FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Buckley, MR
Lippincott, WH
AF Buckley, Matthew R.
Lippincott, W. Hugh
TI Spin-dependent interpretation for possible signals of light dark matter
SO PHYSICAL REVIEW D
LA English
DT Article
ID 730 KG DAYS; SEARCH
AB Signals broadly compatible with light (7-10 GeV) dark matter have been reported in three direct detection experiments: CoGeNT, DAMA/LIBRA, and CDMS-II silicon. These possible signals have been interpreted in the context of spin-independent interactions between the target nuclei and dark matter, although there is tension with null results, particularly from xenon-based experiments. In this paper, we demonstrate that the CoGeNT and CDMS-II silicon results are also compatible assuming a spin-dependent neutron interaction, though this is in tension with xenon-based experiments and PICASSO. The tension with the null results from XENON100 and XENON10 is approximately the same as for the spin-independent coupling. All three experimental signals can be made compatible through a combination of spin-dependent interactions with both the proton and neutron, although such a scenario increases the conflict with the null results of other experiments.
C1 [Buckley, Matthew R.; Lippincott, W. Hugh] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
RP Buckley, MR (reprint author), Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, POB 500, Batavia, IL 60510 USA.
NR 56
TC 9
Z9 9
U1 1
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD SEP 3
PY 2013
VL 88
IS 5
AR 056003
DI 10.1103/PhysRevD.88.056003
PG 5
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 211GG
UT WOS:000323893400014
ER
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CA CMS Collaboration
TI Measurement of neutral strange particle production in the underlying
event in proton-proton collisions at root s=7 TeV
SO PHYSICAL REVIEW D
LA English
DT Article
AB Measurements are presented of the production of primary K-S(0) and Lambda particles in proton-proton collisions at root s = 7 TeV in the region transverse to the leading charged-particle jet in each event. The average multiplicity and average scalar transverse momentum sum of K-S(0) and Lambda particles measured at pseudorapidities vertical bar eta vertical bar < 2 rise with increasing charged-particle jet p(T) in the range 1-10 GeV/c and saturate in the region 10-50 GeV/c. The rise and saturation of the strange-particle yields and transverse momentum sums in the underlying event are similar to those observed for inclusive charged particles, which confirms the impact-parameter picture of multiple parton interactions. The results are compared to recent tunes of the PYTHIA Monte Carlo event generator. The PYTHIA simulations underestimate the data by 15%-30% for K-S(0) mesons and by about 50% for Lambda baryons, a deficit similar to that observed for the inclusive strange-particle production in non-single-diffractive proton-proton collisions. The constant strange-to charged-particle activity ratios with respect to the leading jet p(T) and similar trends for mesons and baryons indicate that the multiparton-interaction dynamics is decoupled from parton hadronization, which occurs at a later stage.
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[De Cosa, A.; Iorio, A. O. M.] Univ Naples Federico II, Naples, Italy.
[Cavallo, N.; Fabozzi, F.] Univ Basilicata Potenza, Naples, Italy.
[Meola, S.] Univ G Marconi Roma, Naples, Italy.
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[Gabusi, M.; Ratti, S. P.; Riccardi, C.; Vitulo, P.] Univ Pavia, I-27100 Pavia, Italy.
[Biasini, M.; Bilei, G. M.; Fano, L.; Lariccia, P.; Mantovani, G.; Menichelli, M.; Nappi, A.; Romeo, F.; Saha, A.; Santocchia, A.; Spiezia, A.] Ist Nazl Fis Nucl, Sez Perugia, Perugia, Italy.
[Biasini, M.; Fano, L.; Lariccia, P.; Mantovani, G.; Nappi, A.; Romeo, F.; Santocchia, A.; Spiezia, A.] Univ Perugia, I-06100 Perugia, Italy.
[Androsov, K.; Azzurri, P.; Bagliesi, G.; Boccali, T.; Broccolo, G.; Castaldi, R.; D'Agnolo, R. T.; Dell'Orso, R.; Fiori, F.; Foa, L.; Giassi, A.; Kraan, A.; Ligabue, F.; Lomtadze, T.; Martini, L.; Messineo, A.; Palla, F.; Rizzi, A.; Serban, A. T.; Spagnolo, P.; Squillacioti, P.; Tenchini, R.; Tonelli, G.; Venturi, A.; Verdini, P. G.; Vernieri, C.] Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy.
[Messineo, A.; Rizzi, A.; Tonelli, G.] Univ Pisa, Pisa, Italy.
[Broccolo, G.; D'Agnolo, R. T.; Fiori, F.; Foa, L.; Ligabue, F.; Verdini, P. G.; Vernieri, C.] Scuola Normale Super Pisa, Pisa, Italy.
[Barone, L.; Cavallari, F.; Del Re, D.; Diemoz, M.; Grassi, M.; Longo, E.; Margaroli, F.; Meridiani, P.; Micheli, F.; Nourbakhsh, S.; Organtini, G.; Paramatti, R.; Rahatlou, S.; Soffi, L.; Rovelli, C.] Ist Nazl Fis Nucl, Sez Roma, Rome, Italy.
[Barone, L.; Del Re, D.; Grassi, M.; Longo, E.; Margaroli, F.; Micheli, F.; Nourbakhsh, S.; Organtini, G.; Rahatlou, S.; Soffi, L.] Univ Rome, Rome, Italy.
[Amapane, N.; Arcidiacono, R.; Argiro, S.; Arneodo, M.; Biino, C.; Cartiglia, N.; Casasso, S.; Costa, M.; De Remigis, P.; Demaria, N.; Mariotti, C.; Maselli, S.; Migliore, E.; Monaco, V.; Musich, M.; Obertino, M. M.; Pastrone, N.; Pelliccioni, M.; Potenza, A.; Romero, A.; Ruspa, M.; Sacchi, R.; Solano, A.; Staiano, A.; Tamponi, U.] Ist Nazl Fis Nucl, Sez Torino, Turin, Italy.
[Amapane, N.; Argiro, S.; Casasso, S.; Costa, M.; Migliore, E.; Monaco, V.; Potenza, A.; Romero, A.; Sacchi, R.; Solano, A.] Univ Turin, Turin, Italy.
[Arcidiacono, R.; Arneodo, M.; Obertino, M. M.; Ruspa, M.] Univ Piemonte Orientale Novara, Turin, Italy.
[Belforte, S.; Candelise, V.; Casarsa, M.; Cossutti, F.; Della Ricca, G.; Gobbo, B.; La Licata, C.; Marone, M.; Montanino, D.; Penzo, A.; Schizzi, A.; Zanetti, A.] Ist Nazl Fis Nucl, Sez Trieste, Trieste, Italy.
[Candelise, V.; Della Ricca, G.; La Licata, C.; Marone, M.; Montanino, D.; Schizzi, A.] Univ Trieste, Trieste, Italy.
[Kim, T. Y.; Nam, S. K.] Kangwon Natl Univ, Chunchon, South Korea.
[Chang, S.; Kim, D. H.; Kim, G. N.; Kim, J. E.; Kong, D. J.; Oh, Y. D.; Park, H.; Son, D. C.; Kamon, T.] Kyungpook Natl Univ, Daegu, South Korea.
[Kim, J. Y.; Kim, Zero J.; Song, S.] Chonnam Natl Univ, Inst Universe & Elementary Particles, Kwangju, South Korea.
[Choi, S.; Gyun, D.; Hong, B.; Jo, M.; Kim, H.; Kim, T. J.; Lee, K. S.; Park, S. K.; Roh, Y.] Korea Univ, Seoul, South Korea.
[Choi, M.; Kim, J. H.; Park, C.; Park, I. C.; Park, S.; Ryu, G.] Univ Seoul, Seoul, South Korea.
[Choi, Y.; Choi, Y. K.; Goh, J.; Kim, M. S.; Kwon, E.; Lee, B.; Lee, J.; Lee, S.; Seo, H.; Yu, I.] Sungkyunkwan Univ, Suwon, South Korea.
[Grigelionis, I.; Juodagalvis, A.] Vilnius State Univ, Vilnius, Lithuania.
[Castilla-Valdez, H.; De la Cruz-Burelo, E.; Heredia-De la Cruz, I.; Martinez-Ortega, J.; Sanchez-Hernandez, A.; Villasenor-Cendejas, L. M.] Ctr Invest & Estudios Avanzados IPN, Mexico City, DF, Mexico.
[Moreno, S. Carrillo; Valencia, F. Vazquez] Univ Iberoamer, Mexico City, DF, Mexico.
[Ibarguen, H. A. Salazar] Benemerita Univ Autonoma Puebla, Puebla, Mexico.
[Linares, E. Casimiro; Pineda, A. Morelos; Reyes-Santos, M. A.] Univ Autonoma San Luis Potosi, San Luis Potosi, Mexico.
[Krofcheck, D.] Univ Auckland, Auckland 1, New Zealand.
[Bell, A. J.; Butler, P. H.; Doesburg, R.; Reucroft, S.; Silverwood, H.] Univ Canterbury, Christchurch 1, New Zealand.
[Ahmad, M.; Asghar, M. I.; Butt, J.; Hoorani, H. R.; Khalid, S.; Khan, W. A.; Khurshid, T.; Qazi, S.; Shah, M. A.; Shoaib, M.] Quaid I Azam Univ, Natl Ctr Phys, Islamabad, Pakistan.
[Bluj, M.; Bialkowska, H.; Boimska, B.; Frueboes, T.; Gorski, M.; Kazana, M.; Nawrocki, K.; Romanowska-Rybinska, K.; Szleper, M.; Wrochna, G.; Zalewski, P.] Natl Ctr Nucl Res, Otwock, Poland.
[Brona, G.; Bunkowski, K.; Cwiok, M.; Dominik, W.; Doroba, K.; Kalinowski, A.; Konecki, M.; Krolikowski, J.; Misiura, M.; Wolszczak, W.] Univ Warsaw, Fac Phys, Inst Expt Phys, Warsaw, Poland.
[Almeida, N.; Bargassa, P.; David, A.; Faccioli, P.; Parracho, P. G. Ferreira; Gallinaro, M.; Antunes, J. Rodrigues; Seixas, J.; Varela, J.; Vischia, P.] Lab Instrumentacao & Fis Expt Particulas, Lisbon, Portugal.
[Viret, S.; Tsamalaidze, Z.; Bunin, P.; Gavrilenko, M.; Golutvin, I.; Gorbunov, I.; Kamenev, A.; Karjavin, V.; Konoplyanikov, V.; Kozlov, G.; Lanev, A.; Malakhov, A.; Matveev, V.; Moisenz, P.; Palichik, V.; Perelygin, V.; Shmatov, S.; Skatchkov, N.; Smirnov, V.; Zarubin, A.] Joint Inst Nucl Res, Dubna, Russia.
[Evstyukhin, S.; Golovtsov, V.; Ivanov, Y.; Kim, V.; Levchenko, P.; Murzin, V.; Oreshkin, V.; Smirnov, I.; Sulimov, V.; Uvarov, L.; Vavilov, S.; Vorobyev, A.; Vorobyev, An.] Petersburg Nucl Phys Inst, Gatchina, Russia.
[Andreev, Yu.; Dermenev, A.; Gninenko, S.; Golubev, N.; Kirsanov, M.; Krasnikov, N.; Pashenkov, A.; Tlisov, D.; Toropin, A.; Musienko, Y.] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia.
[Epshteyn, V.; Erofeeva, M.; Gavrilov, V.; Lychkovskaya, N.; Popov, V.; Safronov, G.; Semenov, S.; Spiridonov, A.; Stolin, V.; Vlasov, E.; Zhokin, A.; Starodumov, A.; Nikitenko, A.] Inst Theoret & Expt Phys, Moscow 117259, Russia.
[Azarkin, M.; Dremin, I.; Kirakosyan, M.; Leonidov, A.; Mesyats, G.; Vinogradov, A.] PN Lebedev Phys Inst, Moscow 117924, Russia.
[Popov, A.; Zhukov, V.; Katkov, I.; Belyaev, A.; Boos, E.; Dubinin, M.; Dudko, L.; Ershov, A.; Gribushin, A.; Klyukhin, V.; Kodolova, O.; Lokhtin, I.; Markina, A.; Obraztsov, S.; Petrushanko, S.; Savrin, V.; Snigirev, A.] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow, Russia.
[Azhgirey, I.; Bayshev, I.; Bitioukov, S.; Kachanov, V.; Kalinin, A.; Konstantinov, D.; Krychkine, V.; Petrov, V.; Ryutin, R.; Sobol, A.; Tourtchanovitch, L.; Troshin, S.; Tyurin, N.; Uzunian, A.; Volkov, A.] State Res Ctr Russian Federat, Inst High Energy Phys, Protvino, Russia.
[Adzic, P.; Ekmedzic, M.; Krpic, D.; Milosevic, J.; Milenovic, P.] Univ Belgrade, Fac Phys, Belgrade 11001, Serbia.
[Adzic, P.; Ekmedzic, M.; Krpic, D.; Milosevic, J.; Milenovic, P.] Vinca Inst Nucl Sci, Belgrade, Serbia.
[Aguilar-Benitez, M.; Maestre, J. Alcaraz; Battilana, C.; Calvo, E.; Cerrada, M.; Llatas, M. Chamizo; Colino, N.; De la Cruz, B.; Peris, A. Delgado; Vazquez, D. Dominguez; Bedoya, C. Fernandez; Ramos, J. P. Fernandez; Ferrando, A.; Flix, J.; Fouz, M. C.; Garcia-Abia, P.; Lopez, O. Gonzalez; Lopez, S. Goy; Hernandez, J. M.; Josa, M. I.; Merino, G.; De Martino, E. Navarro; Pelayo, J. Puerta; Olmeda, A. Quintario; Redondo, I.; Romero, L.; Santaolalla, J.; Soares, M. S.; Willmott, C.] CIEMAT, E-28040 Madrid, Spain.
[Albajar, C.; de Troconiz, J. F.] Univ Autonoma Madrid, Madrid, Spain.
[Brun, H.; Cuevas, J.; Menendez, J. Fernandez; Folgueras, S.; Caballero, I. Gonzalez; Iglesias, L. Lloret; Gomez, J. Piedra; Anastassov, A.] Univ Oviedo, Oviedo, Spain.
[Cifuentes, J. A. Brochero; Cabrillo, I. J.; Calderon, A.; Chuang, S. H.; Campderros, J. Duarte; Fernandez, M.; Gomez, G.; Sanchez, J. Gonzalez; Graziano, A.; Jorda, C.; Virto, A. Lopez; Marco, J.; Marco, R.; Rivero, C. Martinez; Matorras, F.; Sanchez, F. J. Munoz; Rodrigo, T.; Rodriguez-Marrero, A. Y.; Ruiz-Jimeno, A.; Scodellaro, L.; Vila, I.; Cortabitarte, R. Vilar] Univ Cantabria, CSIC, Inst Fis Cantabria IFCA, E-39005 Santander, Spain.
[Abbaneo, D.; Auffray, E.; Auzinger, G.; Bachtis, M.; Baillon, P.; Ball, A. H.; Barney, D.; Bendavid, J.; Benitez, J. F.; Bernet, C.; Bianchi, G.; Bloch, P.; Bocci, A.; Bonato, A.; Bondu, O.; Botta, C.; Breuker, H.; Camporesi, T.; Cerminara, G.; Christiansen, T.; Perez, J. A. Coarasa; Colafranceschi, S.; d'Enterria, D.; Dabrowski, A.; De Roeck, A.; De Visscher, S.; Di Guida, S.; Dobson, M.; Dupont-Sagorin, N.; Elliott-Peisert, A.; Eugster, J.; Funk, W.; Georgiou, G.; Giffels, M.; Gigi, D.; Gill, K.; Giordano, D.; Girone, M.; Giunta, M.; Glege, F.; Garrido, R. Gomez-Reino; Gowdy, S.; Guida, R.; Hammer, J.; Hansen, M.; Harris, P.; Hartl, C.; Hegner, B.; Hinzmann, A.; Innocente, V.; Janot, P.; Karavakis, E.; Kousouris, K.; Krajczar, K.; Lecoq, P.; Lee, Y. -J.; Lourenco, C.; Magini, N.; Malberti, M.; Malgeri, L.; Mannelli, M.; Masetti, L.; Meijers, F.; Mersi, S.; Meschi, E.; Moser, R.; Mulders, M.; Musella, P.; Nesvold, E.; Orsini, L.; Cortezon, E. Palencia; Perez, E.; Perrozzi, L.; Petrilli, A.; Pfeiffer, A.; Pierini, M.; Pimiae, M.; Piparo, D.; Plagge, M.; Polese, G.; Quertenmont, L.; Racz, A.; Reece, W.; Rolandi, G.; Rovelli, C.; Rovere, M.; Sakulin, H.; Santanastasio, F.; Schaefer, C.; Schwick, C.; Segoni, I.; Sekmen, S.; Sharma, A.; Siegrist, P.; Silva, P.; Simon, M.; Sphicas, P.; Spiga, D.; Stoye, M.; Tsirou, A.; Veres, G. I.; Vlimant, J. R.; Woehri, H. K.; Worm, S. D.; Zeuner, W. D.] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland.
[Bertl, W.; Deiters, K.; Erdmann, W.; Gabathuler, K.; Horisberger, R.; Ingram, Q.; Kaestli, H. C.; Koenig, S.; Kotlinski, D.; Langenegger, U.; Renker, D.; Rohe, T.; Naegeli, C.] Paul Scherrer Inst, Villigen, Switzerland.
[Abdulsalam, A.; Bachmair, F.; Baeni, L.; Bortignon, P.; Buchmann, M. A.; Casal, B.; Chanon, N.; Deisher, A.; Dissertori, G.; Dittmar, M.; Donega, M.; Duenser, M.; Eller, P.; Freudenreich, K.; Grab, C.; Hits, D.; Lecomte, P.; Lustermann, W.; Marini, A. C.; del Arbol, P. Martinez Ruiz; Mohr, N.; Moortgat, F.; Naegeli, C.; Nef, P.; Nessi-Tedaldi, F.; Pandolfi, F.; Pape, L.; Pauss, F.; Peruzzi, M.; Ronga, F. J.; Rossini, M.; Sala, L.; Sanchez, A. K.; Starodumov, A.; Stieger, B.; Takahashi, M.; Tauscher, L.; Thea, A.; Theofilatos, K.; Treille, D.; Urscheler, C.; Wallny, R.; Weber, H. A.] ETH, Inst Particle Phys, Zurich, Switzerland.
[Amsler, C.; Chiochia, V.; Favaro, C.; Rikova, M. Ivova; Kilminster, B.; Mejias, B. Millan; Otiougova, P.; Robmann, P.; Snoek, H.; Taroni, S.; Tupputi, S.; Verzetti, M.] Univ Zurich, Zurich, Switzerland.
[Cardaci, M.; Chen, K. H.; Ferro, C.; Kuo, C. M.; Li, S. W.; Lin, W.; Lu, Y. J.; Volpe, R.; Yu, S. S.] Natl Cent Univ, Chungli 32054, Taiwan.
[Bartalini, P.; Chang, P.; Chang, Y. H.; Chang, Y. W.; Chao, Y.; Chen, K. F.; Dietz, C.; Grundler, U.; Hou, W. -S.; Hsiung, Y.; Kao, K. Y.; Lei, Y. J.; Lu, R. -S.; Majumder, D.; Petrakou, E.; Shi, X.; Shiu, J. G.; Tzeng, Y. M.; Wang, M.] Natl Taiwan Univ, Taipei 10764, Taiwan.
[Asavapibhop, B.; Suwonjandee, N.] Chulalongkorn Univ, Bangkok, Thailand.
[Adiguzel, A.; Bakirci, M. N.; Cerci, S.; Dozen, C.; Dumanoglu, I.; Eskut, E.; Girgis, S.; Gokbulut, G.; Gurpinar, E.; Hos, I.; Kangal, E. E.; Topaksu, A. Kayis; Onengut, G.; Ozdemir, K.; Ozturk, S.; Polatoz, A.; Sogut, K.; Cerci, D. Sunar; Tali, B.; Topakli, H.; Vergili, M.] Cukurova Univ, Adana, Turkey.
[Akin, I. V.; Aliev, T.; Bilin, B.; Bilmis, S.; Deniz, M.; Gamsizkan, H.; Guler, A. M.; Karapinar, G.; Ocalan, K.; Ozpineci, A.; Serin, M.; Sever, R.; Surat, U. E.; Yalvac, M.; Zeyrek, M.] Middle E Tech Univ, Dept Phys, TR-06531 Ankara, Turkey.
[Guelmez, E.; Isildak, B.; Kaya, M.; Kaya, O.; Ozkorucuklu, S.; Sonmez, N.] Bogazici Univ, Istanbul, Turkey.
[Bahtiyar, H.; Barlas, E.; Cankocak, K.; Guenaydin, Y. O.; Vardarli, F. I.; Yuecel, M.] Istanbul Tech Univ, TR-80626 Istanbul, Turkey.
[Levchuk, L.; Sorokin, P.] Kharkov Phys & Technol Inst, Natl Sci Ctr, UA-310108 Kharkov, Ukraine.
[Brooke, J. J.; Clement, E.; Cussans, D.; Flacher, H.; Frazier, R.; Goldstein, J.; Grimes, M.; Heath, G. P.; Heath, H. F.; Kreczko, L.; Metson, S.; Newbold, D. M.; Nirunpong, K.; Poll, A.; Senkin, S.; Smith, V. J.; Williams, T.] Univ Bristol, Bristol, Avon, England.
[Worm, S. D.; Newbold, D. M.; Basso, L.; Bell, K. W.; Belyaev, A.; Brew, C.; Brown, R. M.; Cockerill, D. J. A.; Coughlan, J. A.; Harder, K.; Harper, S.; Jackson, J.; Olaiya, E.; Petyt, D.; Radburn-Smith, B. C.; Shepherd-Themistocleous, C. H.; Tomalin, I. R.; Womersley, W. J.; Lucas, R.] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
[Bainbridge, R.; Buchmuller, O.; Burton, D.; Colling, D.; Cripps, N.; Cutajar, M.; Dauncey, P.; Davies, G.; Della Negra, M.; Ferguson, W.; Fulcher, J.; Futyan, D.; Gilbert, A.; Bryer, A. Guneratne; Hall, G.; Hatherell, Z.; Hays, J.; Iles, G.; Jarvis, M.; Karapostoli, G.; Kenzie, M.; Lane, R.; Lucas, R.; Lyons, L.; Magnan, A. -M.; Marrouche, J.; Mathias, B.; Nandi, R.; Nash, J.; Nikitenko, A.; Pela, J.; Pesaresi, M.; Petridis, K.; Pioppi, M.; Raymond, D. M.; Rogerson, S.; Rose, A.; Seez, C.; Sharp, P.; Sparrow, A.; Tapper, A.; Acosta, M. Vazquez; Virdee, T.; Wakefield, S.; Wardle, N.; Whyntie, T.] Imperial Coll, London, England.
[Chadwick, M.; Cole, J. E.; Hobson, P. R.; Khan, A.; Kyberd, P.; Leggat, D.; Leslie, D.; Martin, W.; Reid, I. D.; Symonds, P.; Teodorescu, L.; Turner, M.] Brunel Univ, Uxbridge UB8 3PH, Middx, England.
[Dittmann, J.; Hatakeyama, K.; Kasmi, A.; Liu, H.; Scarborough, T.] Baylor Univ, Waco, TX 76798 USA.
[Charaf, O.; Cooper, S. I.; Henderson, C.; Rumerio, P.] Univ Alabama, Tuscaloosa, AL USA.
[Avetisyan, A.; Bose, T.; Fantasia, C.; Heister, A.; Lawson, P.; Lazic, D.; Rohlf, J.; Sperka, D.; John, J. St.; Sulak, L.] Boston Univ, Boston, MA 02215 USA.
[Alimena, J.; Bhattacharya, S.; Christopher, G.; Cutts, D.; Demiragli, Z.; Ferapontov, A.; Garabedian, A.; Heintz, U.; Kukartsev, G.; Laird, E.; Landsberg, G.; Luk, M.; Narain, M.; Segala, M.; Sinthuprasith, T.; Speer, T.] Brown Univ, Providence, RI 02912 USA.
[Breedon, R.; Breto, G.; De La Barca Sanchez, M. Calderon; Chauhan, S.; Chertok, M.; Conway, J.; Conway, R.; Cox, P. T.; Erbacher, R.; Gardner, M.; Houtz, R.; Ko, W.; Kopecky, A.; Lander, R.; Mall, O.; Miceli, T.; Nelson, R.; Pellett, D.; Ricci-Tam, F.; Rutherford, B.; Searle, M.; Smith, J.; Squires, M.; Tripathi, M.; Wilbur, S.; Yohay, R.] Univ Calif Davis, Davis, CA 95616 USA.
[Andreev, V.; Cline, D.; Cousins, R.; Erhan, S.; Everaerts, P.; Farrell, C.; Felcini, M.; Hauser, J.; Ignatenko, M.; Jarvis, C.; Rakness, G.; Schlein, P.; Takasugi, E.; Traczyk, P.; Valuev, V.; Weber, M.] Univ Calif Los Angeles, Los Angeles, CA USA.
[Babb, J.; Clare, R.; Dinardo, M. E.; Ellison, J.; Gary, J. W.; Hanson, G.; Liu, H.; Long, O. R.; Luthra, A.; Nguyen, H.; Paramesvaran, S.; Sturdy, J.; Sumowidagdo, S.; Wilken, R.; Wimpenny, S.] Univ Calif Riverside, Riverside, CA 92521 USA.
[Andrews, W.; Branson, J. G.; Cerati, G. B.; Cittolin, S.; Evans, D.; Holzner, A.; Kelley, R.; Lebourgeois, M.; Letts, J.; Macneill, I.; Mangano, B.; Padhi, S.; Palmer, C.; Petrucciani, G.; Pieri, M.; Sani, M.; Sharma, V.; Simon, S.; Sudano, E.; Tadel, M.; Tu, Y.; Vartak, A.; Wasserbaech, S.; Wuerthwein, F.; Yagil, A.; Yoo, J.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Barge, D.; Bellan, R.; Campagnari, C.; D'Alfonso, M.; Danielson, T.; Flowers, K.; Geffert, P.; George, C.; Golf, F.; Incandela, J.; Justus, C.; Kalavase, P.; Kovalskyi, D.; Krutelyov, V.; Lowette, S.; Villalba, R. Magana; Mccoll, N.; Pavlunin, V.; Ribnik, J.; Richman, J.; Rossin, R.; Stuart, D.; To, W.; West, C.] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
[Dias, F. A.; Dubinin, M.; Apresyan, A.; Bornheim, A.; Bunn, J.; Chen, Y.; Di Marco, E.; Duarte, J.; Kcira, D.; Ma, Y.; Mott, A.; Newman, H. B.; Rogan, C.; Spiropulu, M.; Timciuc, V.; Veverka, J.; Wilkinson, R.; Xie, S.; Yang, Y.] CALTECH, Pasadena, CA 91125 USA.
[Zhu, R. Y.; Azzolini, V.; Calamba, A.; Carroll, R.; Ferguson, T.; Iiyama, Y.; Jang, D. W.; Liu, Y. F.; Paulini, M.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
[Russ, J.; Vogel, H.; Vorobiev, I.; Cumalat, J. P.; Drell, B. R.; Ford, W. T.; Gaz, A.; Lopez, E. Luiggi; Nauenberg, U.; Smith, J. G.; Stenson, K.; Ulmer, K. A.; Wagner, S. R.] Univ Colorado, Boulder, CO 80309 USA.
[Alexander, J.; Chatterjee, A.; Eggert, N.; Gibbons, L. K.; Hopkins, W.; Khukhunaishvili, A.; Kreis, B.; Mirman, N.; Kaufman, G. Nicolas; Patterson, J. R.; Ryd, A.; Salvati, E.; Sun, W.; Teo, W. D.; Thom, J.; Thompson, J.; Tucker, J.; Weng, Y.; Winstrom, L.; Wittich, P.] Cornell Univ, Ithaca, NY USA.
[Winn, D.] Fairfield Univ, Fairfield, CT 06430 USA.
[Abdullin, S.; Albrow, M.; Anderson, J.; Apollinari, G.; Bauerdick, L. A. T.; Beretvas, A.; Berryhill, J.; Bhat, P. C.; Burkett, K.; Butler, J. N.; Chetluru, V.; Cheung, H. W. K.; Chlebana, F.; Cihangir, S.; Elvira, V. D.; Fisk, I.; Freeman, J.; Gao, Y.; Gottschalk, E.; Gray, L.; Green, D.; Gutsche, O.; Hare, D.; Harris, R. M.; Hirschauer, J.; Hooberman, B.; Jindariani, S.; Johnson, M.; Joshi, U.; Klima, B.; Kunori, S.; Kwan, S.; Leonidopoulos, C.; Linacre, J.; Lincoln, D.; Lipton, R.; Lykken, J.; Maeshima, K.; Marraffino, J. M.; Outschoorn, V. I. Martinez; Maruyama, S.; Mason, D.; McBride, P.; Mishra, K.; Mrenna, S.; Musienko, Y.; Newman-Holmes, C.; O'Dell, V.; Prokofyev, O.; Ratnikova, N.; Sexton-Kennedy, E.; Sharma, S.; Spalding, W. J.; Spiegel, L.; Taylor, L.; Tkaczyk, S.; Tran, N. V.; Uplegger, L.; Vaandering, E. W.; Vidal, R.; Whitmore, J.; Wu, W.; Yang, F.; Yun, J. C.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Acosta, D.; Avery, P.; Bourilkov, D.; Chen, M.; Cheng, T.; Das, S.; De Gruttola, M.; Di Giovanni, G. P.; Dobur, D.; Drozdetskiy, A.; Field, R. D.; Fisher, M.; Fu, Y.; Furic, I. K.; Hugon, J.; Kim, B.; Konigsberg, J.; Korytov, A.; Kropivnitskaya, A.; Kypreos, T.; Low, J. F.; Matchev, K.; Milenovic, P.; Mitselmakher, G.; Muniz, L.; Remington, R.; Rinkevicius, A.; Skhirtladze, N.; Snowball, M.; Yelton, J.; Zakaria, M.] Univ Florida, Gainesville, FL USA.
[Gaultney, V.; Hewamanage, S.; Lebolo, L. M.; Linn, S.; Markowitz, P.; Martinez, G.; Rodriguez, J. L.] Florida Int Univ, Miami, FL 33199 USA.
[Adams, T.; Askew, A.; Bochenek, J.; Chen, J.; Diamond, B.; Gleyzer, S. V.; Haas, J.; Hagopian, S.; Hagopian, V.; Johnson, K. F.; Prosper, H.; Veeraraghavan, V.; Weinberg, M.] Florida State Univ, Tallahassee, FL 32306 USA.
[Baarmand, M. M.; Dorney, B.; Hohlmann, M.; Kalakhety, H.; Yumiceva, F.] Florida Inst Technol, Melbourne, FL 32901 USA.
[Adams, M. R.; Apanasevich, L.; Bazterra, V. E.; Betts, R. R.; Bucinskaite, I.; Callner, J.; Cavanaugh, R.; Evdokimov, O.; Gauthier, L.; Gerber, C. E.; Hofman, D. J.; Khalatyan, S.; Kurt, P.; Lacroix, F.; Moon, D. H.; O'Brien, C.; Silkworth, C.; Strom, D.; Turner, P.] UIC, Chicago, IL USA.
[Varelas, N.; Akgun, U.; Albayrak, E. A.; Bilki, B.; Clarida, W.; Dilsiz, K.; Duru, F.; Griffiths, S.; Merlo, J. -P.; Mermerkaya, H.; Mestvirishvili, A.; Moeller, A.; Nachtman, J.; Newsom, C. R.; Ogul, H.; Onel, Y.; Ozok, F.; Sen, S.; Tan, P.; Tiras, E.; Wetzel, J.; Yetkin, T.; Yi, K.] Univ Iowa, Iowa City, IA USA.
[Barnett, B. A.; Blumenfeld, B.; Bolognesi, S.; Fehling, D.; Giurgiu, G.; Gritsan, A. V.; Guo, Z. J.; Hu, G.; Maksimovic, P.; Swartz, M.; Whitbeck, A.] Johns Hopkins Univ, Baltimore, MD USA.
[Sibille, J.; Baringer, P.; Bean, A.; Benelli, G.; Kenny, R. P., III; Murray, M.; Noonan, D.; Sanders, S.; Stringer, R.; Wood, J. S.] Univ Kansas, Lawrence, KS 66045 USA.
[Barfuss, A. F.; Chakaberia, I.; Ivanov, A.; Khalil, S.; Makouski, M.; Maravin, Y.; Shrestha, S.; Svintradze, I.] Kansas State Univ, Manhattan, KS 66506 USA.
[Gronberg, J.; Lange, D.; Rebassoo, F.; Wright, D.] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Baden, A.; Calvert, B.; Eno, S. C.; Gomez, J. A.; Hadley, N. J.; Kellogg, R. G.; Kolberg, T.; Lu, Y.; Marionneau, M.; Mignerey, A. C.; Pedro, K.; Peterman, A.; Skuja, A.; Temple, J.; Tonjes, M. B.; Tonwar, S. C.] Univ Maryland, College Pk, MD 20742 USA.
[Apyan, A.; Bauer, G.; Busza, W.; Butz, E.; Cali, I. A.; Chan, M.; Dutta, V.; Ceballos, G. Gomez; Goncharov, M.; Kim, Y.; Klute, M.; Lai, Y. S.; Levin, A.; Luckey, P. D.; Ma, T.; Nahn, S.; Paus, C.; Ralph, D.; Roland, C.; Roland, G.; Stephans, G. S. F.; Stoeckli, F.; Sumorok, K.; Sung, K.; Velicanu, D.; Wolf, R.; Wyslouch, B.; Yang, M.; Yilmaz, Y.; Yoon, A. S.; Zanetti, M.; Zhukova, V.] MIT, Cambridge, MA 02139 USA.
[Dahmes, B.; De Benedetti, A.; Franzoni, G.; Gude, A.; Haupt, J.; Kao, S. C.; Klapoetke, K.; Kubota, Y.; Mans, J.; Pastika, N.; Rusack, R.; Sasseville, M.; Singovsky, A.; Tambe, N.; Turkewitz, J.] Univ Minnesota, Minneapolis, MN USA.
[Cremaldi, L. M.; Kroeger, R.; Perera, L.; Rahmat, R.; Sanders, D. A.; Summers, D.] Univ Mississippi, Oxford, MS USA.
[Avdeeva, E.; Bloom, K.; Bose, S.; Claes, D. R.; Dominguez, A.; Eads, M.; Suarez, R. Gonzalez; Keller, J.; Kravchenko, I.; Lazo-Flores, J.; Malik, S.; Meier, F.; Snow, G. R.] Univ Nebraska Lincoln, Lincoln, NE USA.
[Dolen, J.; Godshalk, A.; Iashvili, I.; Jain, S.; Kharchilava, A.; Kumar, A.; Rappoccio, S.; Wan, Z.] SUNY Coll Buffalo, Buffalo, NY 14222 USA.
[Alverson, G.; Barberis, E.; Baumgartel, D.; Chasco, M.; Haley, J.; Nash, D.; Orimoto, T.; Trocino, D.; Wood, D.; Zhang, J.] Northeastern Univ, Boston, MA 02115 USA.
[Anastassov, A.; Hahn, K. A.; Kubik, A.; Lusito, L.; Mucia, N.; Odell, N.; Pollack, B.; Pozdnyakov, A.; Schmitt, M.; Stoynev, S.; Velasco, M.; Won, S.] Northwestern Univ, Evanston, IL USA.
[Berry, D.; Brinkerhoff, A.; Chan, K. M.; Hildreth, M.; Jessop, C.; Karmgard, D. J.; Kolb, J.; Lannon, K.; Luo, W.; Lynch, S.; Marinelli, N.; Morse, D. M.; Pearson, T.; Planer, M.; Ruchti, R.; Slaunwhite, J.; Valls, N.; Wayne, M.; Wolf, M.] Univ Notre Dame, Notre Dame, IN 46556 USA.
[Antonelli, L.; Bylsma, B.; Durkin, L. S.; Hill, C.; Hughes, R.; Kotov, K.; Ling, T. Y.; Puigh, D.; Rodenburg, M.; Smith, G.; Vuosalo, C.; Williams, G.; Winer, B. L.; Wolfe, H.] Ohio State Univ, Columbus, OH 43210 USA.
[Berry, E.; Elmer, P.; Halyo, V.; Hebda, P.; Hegeman, J.; Hunt, A.; Jindal, P.; Koay, S. A.; Pegna, D. Lopes; Lujan, P.; Marlow, D.; Medvedeva, T.; Mooney, M.; Olsen, J.; Piroue, P.; Quan, X.; Raval, A.; Saka, H.; Stickland, D.; Tully, C.; Werner, J. S.; Zenz, S. C.; Zuranski, A.] Princeton Univ, Princeton, NJ 08544 USA.
[Brownson, E.; Lopez, A.; Mendez, H.; Vargas, J. E. Ramirez] Univ Puerto Rico, Mayaguez, PR USA.
[Abdulsalam, A.; Alagoz, E.; Benedetti, D.; Bolla, G.; Bortoletto, D.; De Mattia, M.; Everett, A.; Hu, Z.; Jones, M.; Jung, K.; Koybasi, O.; Kress, M.; Leonardo, N.; Maroussov, V.; Merkel, P.; Miller, D. H.; Neumeister, N.; Shipsey, I.; Silvers, D.; Svyatkovskiy, A.; Marono, M. Vidal; Wang, F.; Xu, L.; Yoo, H. D.; Zablocki, J.; Zheng, Y.] Purdue Univ, W Lafayette, IN 47907 USA.
[Guragain, S.; Parashar, N.] Purdue Univ Calumet, Hammond, IN USA.
[Adair, A.; Akgun, B.; Ecklund, K. M.; Geurts, F. J. M.; Li, W.; Padley, B. P.; Redjimi, R.; Roberts, J.; Zabel, J.] Rice Univ, Houston, TX USA.
[Betchart, B.; Bodek, A.; Covarelli, R.; De Barbaro, P.; Demina, R.; Eshaq, Y.; Ferbel, T.; Garcia-Bellido, A.; Goldenzweig, P.; Han, J.; Harel, A.; Miner, D. C.; Petrillo, G.; Vishnevskiy, D.; Zielinski, M.] Univ Rochester, Rochester, NY USA.
[Bhatti, A.; Ciesielski, R.; Demortier, L.; Goulianos, K.; Lungu, G.; Malik, S.; Mesropian, C.] Rockefeller Univ, New York, NY 10021 USA.
[Arora, S.; Barker, A.; Chou, J. P.; Contreras-Campana, C.; Contreras-Campana, E.; Duggan, D.; Ferencek, D.; Gershtein, Y.; Gray, R.; Halkiadakis, E.; Hidas, D.; Lath, A.; Panwalkar, S.; Park, M.; Patel, R.; Rekovic, V.; Robles, J.; Rose, K.; Salur, S.; Schnetzer, S.; Seitz, C.; Somalwar, S.; Stone, R.; Thomas, S.; Walker, M.] Rutgers State Univ, Piscataway, NJ USA.
[Cerizza, G.; Hollingsworth, M.; Spanier, S.; Yang, Z. C.; York, A.] Univ Tennessee, Knoxville, TN USA.
[Eusebi, R.; Flanagan, W.; Gilmore, J.; Kamon, T.; Khotilovich, V.; Montalvo, R.; Osipenkov, I.; Pakhotin, Y.; Perloff, A.; Roe, J.; Safonov, A.; Sakuma, T.; Suarez, I.; Tatarinov, A.; Toback, D.] Texas A&M Univ, College Stn, TX USA.
[Akchurin, N.; Damgov, J.; Dragoiu, C.; Dudero, P. R.; Jeong, C.; Kovitanggoon, K.; Lee, S. W.; Libeiro, T.; Volobouev, I.; Delannoy, A. G.; Greene, S.; Gurrola, A.; Johns, W.] Texas Tech Univ, Lubbock, TX 79409 USA.
[Appelt, E.; Maguire, C.; Mao, Y.; Melo, A.; Sharma, M.; Sheldon, P.; Snook, B.; Tuo, S.; Velkovska, J.] Vanderbilt Univ, Nashville, TN 37235 USA.
[Arenton, M. W.; Boutle, S.; Cox, B.; Francis, B.; Goodell, J.; Hirosky, R.; Ledovskoy, A.; Lin, C.; Neu, C.; Wood, J.] Univ Virginia, Charlottesville, VA USA.
[Gollapinni, S.; Harr, R.; Karchin, P. E.; Don, C. Kottachchi Kankanamge; Lamichhane, P.; Sakharov, A.] Wayne State Univ, Detroit, MI USA.
[Anderson, M.; Belknap, D. A.; Borrello, L.; Carlsmith, D.; Cepeda, M.; Dasu, S.; Friis, E.; Grogg, K. S.; Grothe, M.; Hall-Wilton, R.; Herndon, M.; Herve, A.; Kaadze, K.; Klabbers, P.; Klukas, J.; Lanaro, A.; Lazaridis, C.; Loveless, R.; Mohapatra, A.; Mozer, M. U.; Ojalvo, I.; Pierro, G. A.; Ross, I.; Savin, A.; Smith, W. H.; Swanson, J.] Univ Wisconsin, Madison, WI USA.
[Fabjan, C.; Fruehwirth, R.; Jeitler, M.; Krammer, M.; Wulz, C. -E.] Vienna Univ Technol, A-1040 Vienna, Austria.
[Rabady, D.; Genchev, V.; Iaydjiev, P.; Lingemann, J.; Guthoff, M.; Hartmann, F.; Hauth, T.; Kornmayer, A.; Mohanty, A. K.; Safarzadeh, B.; De Filippis, N.; Masetti, G.; Giordano, F.; Lucchini, M. T.; Martelli, A.; Meola, S.; Paolucci, P.; Galanti, M.; D'Agnolo, R. T.; Ligabue, F.; Grassi, M.; Pelliccioni, M.; Cossutti, F.; Seixas, J.; Llatas, M. Chamizo] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland.
[Chinellato, J.; Tonelli Manganote, E. J.] Univ Estadual Campinas, Campinas, SP, Brazil.
[Assran, Y.] Suez Canal Univ, Suez, Egypt.
[Kamel, A. Ellithi] Cairo Univ, Cairo, Egypt.
[Mahmoud, M. A.] Fayoum Univ, Al Fayyum, Egypt.
[Mahrous, A.] Helwan Univ, Cairo, Egypt.
[Radi, A.] British Univ Egypt, Cairo, Egypt.
[Agram, J. -L.; Conte, E.; Drouhin, F.; Fontaine, J. -C.] Univ Haute Alsace, Mulhouse, France.
[Bergholz, M.; Lohmann, W.; Schmidt, R.] Brandenburg Tech Univ Cottbus, Cottbus, Germany.
[Vesztergombi, G.; Veres, G. I.] Eotvos Lorand Univ, Budapest, Hungary.
[Maity, M.] Visva Bharati Univ, Santini Ketan, W Bengal, India.
[Wickramage, N.] Univ Ruhuna, Matara, Sri Lanka.
[Arfaei, H.; Fahim, A.] Sharif Univ Technol, Tehran, Iran.
[Etesami, S. M.] Isfahan Univ Technol, Esfahan, Iran.
[Safarzadeh, B.; Leonidopoulos, C.] Islamic Azad Univ, Plasma Phys Res Ctr, Sci & Res Branch, Tehran, Iran.
[Androsov, K.; Martini, L.] Univ Siena, I-53100 Siena, Italy.
[Heredia-De la Cruz, I.] Univ Michoacana, Morelia, Michoacan, Mexico.
[Adzic, P.; Krpic, D.] Univ Belgrade, Fac Phys, Belgrade 11001, Serbia.
[Colafranceschi, S.] Univ Rome, Fac Ingn, Rome, Italy.
[Rolandi, G.] Ist Nazl Fis Nucl, Scuola Normale & Sez, Pisa, Italy.
[Amsler, C.] Albert Einstein Ctr Fundamental Phys, Bern, Switzerland.
[Bakirci, M. N.; Ozturk, S.; Topakli, H.] Gaziosmanpasa Univ, Tokat, Turkey.
[Cerci, S.; Cerci, D. Sunar; Tali, B.] Adiyaman Univ, Adiyaman, Turkey.
[Onengut, G.] Cag Univ, Mersin, Turkey.
[Sogut, K.] Mersin Univ, Mersin, Turkey.
[Karapinar, G.] Izmir Inst Technol, Izmir, Turkey.
[Isildak, B.] Ozyegin Univ, Istanbul, Turkey.
[Kaya, M.; Kaya, O.] Kafkas Univ, Kars, Turkey.
[Ozkorucuklu, S.] Suleyman Demirel Univ, TR-32200 Isparta, Turkey.
[Sonmez, N.] Ege Univ, Izmir, Turkey.
[Bahtiyar, H.; Albayrak, E. A.; Ozok, F.] Mimar Sinan Univ, Istanbul, Turkey.
[Guenaydin, Y. O.] Kahramanmaras Sutcu Imam Univ, TR-46050 Kahramanmaras, Turkey.
[Basso, L.; Belyaev, A.] Univ Southampton, Sch Phys & Astron, Southampton, Hants, England.
[Pioppi, M.] Univ Perugia, Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy.
[Wasserbaech, S.] Utah Valley Univ, Orem, UT USA.
[Leonidopoulos, C.] Univ Edinburgh, Edinburgh, Midlothian, Scotland.
[Bilki, B.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Mermerkaya, H.] Erzincan Univ, Erzincan, Turkey.
[Yetkin, T.] Yildiz Tekn Univ, Istanbul, Turkey.
RP Chatrchyan, S (reprint author), Yerevan Phys Inst, Yerevan 375036, Armenia.
RI Rolandi, Luigi (Gigi)/E-8563-2013; Sguazzoni, Giacomo/J-4620-2015; Inst.
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Mikhail/I-3942-2016; Paganoni, Marco/A-4235-2016; Kirakosyan,
Martin/N-2701-2015; Raidal, Martti/F-4436-2012; Lazzizzera,
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Demaria, Natale/0000-0003-0743-9465; Vieira de Castro Ferreira da Silva,
Pedro Manuel/0000-0002-5725-041X; Bean, Alice/0000-0001-5967-8674;
Longo, Egidio/0000-0001-6238-6787; Di Matteo,
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Dudko, Lev/0000-0002-4462-3192; Tinoco Mendes, Andre
David/0000-0001-5854-7699;
FU Austrian Federal Ministry of Science and Research; Austrian Science
Fund; Belgian Fonds de la Recherche Scientifique; Fonds voor
Wetenschappelijk Onderzoek; CNPq; CAPES; FAPERJ; FAPESP; Bulgarian
Ministry of Education, Youth and Science; CERN; Chinese Academy of
Sciences; Ministry of Science and Technology; National Natural Science
Foundation of China; Colombian Funding Agency (COLCIENCIAS); Croatian
Ministry of Science, Education and Sport; Research Promotion Foundation,
Cyprus; Ministry of Education and Research [SF0690030s09]; European
Regional Development Fund, Estonia; Academy of Finland; Finnish Ministry
of Education and Culture; Helsinki Institute of Physics; Institut
National de Physique Nucleaire et de Physique des Particules/CNRS;
Commissariat a l'Energie Atomique et aux Energies Alternatives/CEA,
France; Bundesministerium fur Bildung und Forschung; Deutsche
Forschungsgemeinschaft; Helmholtz-Gemeinschaft Deutscher
Forschungszentren, Germany; General Secretariat for Research and
Technology, Greece; National Scientific Research Foundation; National
Office for Research and Technology, Hungary; Department of Atomic
Energy; Department of Science and Technology, India; Institute for
Studies in Theoretical Physics and Mathematics, Iran; Science
Foundation, Ireland; Istituto Nazionale di Fisica Nucleare, Italy;
Korean Ministry of Education, Science and Technology; World Class
University program of NRF, Republic of Korea; Lithuanian Academy of
Sciences; CINVESTAV; CONACYT; SEP; UASLP-FAI; Ministry of Science and
Innovation, New Zealand; Pakistan Atomic Energy Commission; Ministry of
Science and Higher Education; National Science Centre, Poland; Fundacao
para a Ciencia e a Tecnologia, Portugal; JINR (Armenia); JINR (Belarus);
JINR (Georgia); JINR (Ukraine); JINR (Uzbekistan); Ministry of Education
and Science of the Russian Federation; Federal Agency of Atomic Energy
of the Russian Federation; Russian Academy of Sciences; Russian
Foundation for Basic Research; Ministry of Science and Technological
Development of Serbia; Secretaria de Estado de Investigacion; Desarrollo
e Innovacion and Programa Consolider-Ingenio, Spain; ETH Board; ETH
Zurich; PSI; SNF; UniZH; Canton Zurich; SER; National Science Council,
Taipei; Thailand Center of Excellence in Physics; Institute for the
Promotion of Teaching Science and Technology of Thailand; National
Science and Technology Development Agency of Thailand; Scientific and
Technical Research Council of Turkey; Turkish Atomic Energy Authority;
Science and Technology Facilities Council, UK; US Department of Energy;
National Science Foundation; Marie-Curie programme; European Research
Council; EPLANET (European Union); Leventis Foundation; A. P. Sloan
Foundation; Alexander von Humboldt Foundation; Belgian Federal Science
Policy Office; Fonds pour la Formation a la Recherche dans l'Industrie
et dans l'Agriculture (FRIA-Belgium); Agentschap voor Innovatie door
Wetenschap en Technologie (IWT-Belgium); Ministry of Education, Youth
and Sports (MEYS) of Czech Republic; Council of Science and Industrial
Research, India; Compagnia di San Paolo (Torino); HOMING PLUS programme
of Foundation for Polish Science; EU; Regional Development Fund; EU-ESF;
Greek NSRF
FX We congratulate our colleagues in the CERN accelerator departments for
the excellent performance of the LHC and thank the technical and
administrative staffs at CERN and at other CMS institutes for their
contributions to the success of the CMS effort. In addition, we
gratefully acknowledge the computing centers and personnel of the
Worldwide LHC Computing Grid for delivering so effectively the computing
infrastructure essential to our analyses. Finally, we acknowledge the
enduring support for the construction and operation of the LHC and the
CMS detector provided by the following funding agencies: the Austrian
Federal Ministry of Science and Research and the Austrian Science Fund;
the Belgian Fonds de la Recherche Scientifique, and Fonds voor
Wetenschappelijk Onderzoek; the Brazilian Funding Agencies (CNPq, CAPES,
FAPERJ, and FAPESP); the Bulgarian Ministry of Education, Youth and
Science; CERN; the Chinese Academy of Sciences, Ministry of Science and
Technology, and National Natural Science Foundation of China; the
Colombian Funding Agency (COLCIENCIAS); the Croatian Ministry of
Science, Education and Sport; the Research Promotion Foundation, Cyprus;
the Ministry of Education and Research, Recurrent financing Contract No.
SF0690030s09 and European Regional Development Fund, Estonia; the
Academy of Finland, Finnish Ministry of Education and Culture, and
Helsinki Institute of Physics; the Institut National de Physique
Nucleaire et de Physique des Particules/CNRS, and Commissariat a
l'Energie Atomique et aux Energies Alternatives/CEA, France; the
Bundesministerium fur Bildung und Forschung, Deutsche
Forschungsgemeinschaft, and Helmholtz-Gemeinschaft Deutscher
Forschungszentren, Germany; the General Secretariat for Research and
Technology, Greece; the National Scientific Research Foundation, and
National Office for Research and Technology, Hungary; the Department of
Atomic Energy and the Department of Science and Technology, India; the
Institute for Studies in Theoretical Physics and Mathematics, Iran; the
Science Foundation, Ireland; the Istituto Nazionale di Fisica Nucleare,
Italy; the Korean Ministry of Education, Science and Technology and the
World Class University program of NRF, Republic of Korea; the Lithuanian
Academy of Sciences; the Mexican Funding Agencies (CINVESTAV, CONACYT,
SEP, and UASLP-FAI); the Ministry of Science and Innovation, New
Zealand; the Pakistan Atomic Energy Commission; the Ministry of Science
and Higher Education and the National Science Centre, Poland; the
Fundacao para a Ciencia e a Tecnologia, Portugal; JINR (Armenia,
Belarus, Georgia, Ukraine, Uzbekistan); the Ministry of Education and
Science of the Russian Federation, the Federal Agency of Atomic Energy
of the Russian Federation, Russian Academy of Sciences, and the Russian
Foundation for Basic Research; the Ministry of Science and Technological
Development of Serbia; the Secretaria de Estado de Investigacion,
Desarrollo e Innovacion and Programa Consolider-Ingenio 2010, Spain; the
Swiss Funding Agencies (ETH Board, ETH Zurich, PSI, SNF, UniZH, Canton
Zurich, and SER); the National Science Council, Taipei; the Thailand
Center of Excellence in Physics, the Institute for the Promotion of
Teaching Science and Technology of Thailand and the National Science and
Technology Development Agency of Thailand; the Scientific and Technical
Research Council of Turkey, and Turkish Atomic Energy Authority; the
Science and Technology Facilities Council, UK; and the US Department of
Energy and National Science Foundation.; Individuals have received
support from the Marie-Curie programme and the European Research Council
and EPLANET (European Union); the Leventis Foundation; the A. P. Sloan
Foundation; the Alexander von Humboldt Foundation; the Belgian Federal
Science Policy Office; the Fonds pour la Formation a la Recherche dans
l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor
Innovatie door Wetenschap en Technologie (IWT-Belgium); the Ministry of
Education, Youth and Sports (MEYS) of Czech Republic; the Council of
Science and Industrial Research, India; the Compagnia di San Paolo
(Torino); the HOMING PLUS programme of Foundation for Polish Science,
cofinanced by EU, Regional Development Fund; and the Thalis and Aristeia
programmes cofinanced by EU-ESF and the Greek NSRF.
NR 31
TC 2
Z9 2
U1 3
U2 113
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
EI 1550-2368
J9 PHYS REV D
JI Phys. Rev. D
PD SEP 3
PY 2013
VL 88
IS 5
AR UNSP 052001
DI 10.1103/PhysRevD.88.052001
PG 21
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 211GG
UT WOS:000323893400001
ER
PT J
AU Dai, LY
Portoles, J
Shekhovtsova, O
AF Dai, L. Y.
Portoles, J.
Shekhovtsova, O.
TI Three pseudoscalar meson production in e(+)e(-) annihilation
SO PHYSICAL REVIEW D
LA English
DT Article
ID ELECTRON-POSITRON ANNIHILATION; TO-LEADING ORDER; CHIRAL
PERTURBATION-THEORY; HADRONIC CROSS-SECTION; INTERVAL 1350-2400 MEV;
LOW-ENERGY CONSTANTS; RADIATIVE RETURN; PHENOMENOLOGICAL LAGRANGIANS;
QUANTUM CHROMODYNAMICS; PHOTON-EMISSION
AB We study-at leading order in the large number of colors expansion and within the resonance chiral theory framework-the odd-intrinsic-parity e(+)e(-) -> pi(+)pi(-) (pi(0); eta) cross sections in the energy regime populated by hadron resonances, namely 3m(pi) less than or similar to E less than or similar to 2 GeV. In addition, we implement our results in the Monte Carlo generator PHOKHARA 7.0 and we simulate hadron production through the radiative return method.
C1 [Dai, L. Y.] Peking Univ, Dept Phys, Beijing 1000871, Peoples R China.
[Dai, L. Y.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
[Portoles, J.] Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain.
[Shekhovtsova, O.] NSC Kharkov Inst Phys & Technol, UA-61108 Kharkov, Ukraine.
[Shekhovtsova, O.] PAN, Inst Nucl Phys, Krakow, Poland.
RP Dai, LY (reprint author), Peking Univ, Dept Phys, Beijing 1000871, Peoples R China.
EM lingyun@jlab.org; Jorge.Portoles@ific.uv.es;
olga.shekhovtsova@ifj.edu.pl
RI Portoles, Jorge/A-1219-2007
OI Portoles, Jorge/0000-0003-1038-4303
FU China Scholarship Council; Polish National Science Centre
[DEC-2012/04/M/ST2/00240, DEC-2011/03/B/ST2/00107]; Spanish Government;
ERDF funds from the EU Commission [FPA2007-60323, FPA2011-23778,
CSD2007-00042]; U.S. DOE [DE-AC05-06OR23177]
FX Conversations with German Rodrigo on the topic of this paper are warmly
acknowledged. We would like to thank Henryk Czyz for fruitful
discussions on context of MC PHOKHARA 7.0. We also wish to thank Michael
R. Pennington for a careful reading of our manuscript and for his
suggestions. Lingyun Dai thanks the China Scholarship Council for their
support. This research has been supported in part by the funds of the
Polish National Science Centre under decisions DEC-2012/04/M/ST2/00240
and DEC-2011/03/B/ST2/00107 (O. S.) and by the Spanish Government and
ERDF funds from the EU Commission [Grants No. FPA2007-60323, No.
FPA2011-23778, No. CSD2007-00042 (Consolider Project CPAN)]. This paper
has been authored in part by Jefferson Science Associates, LLC under
U.S. DOE Contract No. DE-AC05-06OR23177.
NR 65
TC 8
Z9 8
U1 0
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD SEP 3
PY 2013
VL 88
IS 5
AR 056001
DI 10.1103/PhysRevD.88.056001
PG 23
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 211GG
UT WOS:000323893400012
ER
PT J
AU Liu, YZ
Meurice, Y
Qin, MP
Unmuth-Yockey, J
Xiang, T
Xie, ZY
Yu, JF
Zou, HY
AF Liu, Yuzhi
Meurice, Y.
Qin, M. P.
Unmuth-Yockey, J.
Xiang, T.
Xie, Z. Y.
Yu, J. F.
Zou, Haiyuan
TI Exact blocking formulas for spin and gauge models
SO PHYSICAL REVIEW D
LA English
DT Article
ID MATRIX RENORMALIZATION-GROUP; LATTICE; SYSTEMS; DUALITY; FLAVORS
AB Using the example of the two-dimensional (2D) Ising model, we show that in contrast to what can be done in configuration space, the tensor renormalization group formulation allows one to write exact, compact, and manifestly local blocking formulas and exact coarse-grained expressions for the partition function. We argue that similar results should hold for most models studied by lattice gauge theorists. We provide exact blocking formulas for several 2D spin models [the O(2) and O(3) sigma models and the SU(2) principal chiral model] and for the three-dimensional gauge theories with groups Z(2), U(1) and SU(2). We briefly discuss generalizations to other groups, higher dimensions and practical implementations.
C1 [Liu, Yuzhi; Meurice, Y.; Unmuth-Yockey, J.; Zou, Haiyuan] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
[Liu, Yuzhi] Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA.
[Qin, M. P.; Xiang, T.; Xie, Z. Y.; Yu, J. F.] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
RP Liu, YZ (reprint author), Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
RI qin, mingpu/S-1545-2016;
OI qin, mingpu/0000-0001-7733-9684; Meurice, Yannick/0000-0002-0995-9694
FU Department of Energy [DE-SC0010114, FG02-91ER40664]; Office of Science
of the U.S. Department of Energy [DE-AC02-05CH11231]; URA Visiting
Scholars' program; United States Department of Energy; NSF [1066293];
[DE-AC02-07CH11359]
FX This research was supported in part by the Department of Energy under
Awards No. DE-SC0010114 and No. FG02-91ER40664. Preliminary numerical
work checking the validity of analytical formulas presented here used
resources of the National Energy Research Scientific Computing Center,
which is supported by the Office of Science of the U.S. Department of
Energy under Contract No. DE-AC02-05CH11231. Y.L. is supported by the
URA Visiting Scholars' program. Fermilab is operated by Fermi Research
Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the United
States Department of Energy. Our work on the subject started while
attending the KITPC workshop "Critical Properties of Lattice Models" in
summer 2012. Y. M. did part of the work while at the workshop "LGT in
the LHC Era" in summer 2013 at the Aspen Center for Physics supported by
NSF Grant No 1066293. We thank M. C. Banuls, S. Chandrasekharan, A.
Denbleyker, A. Hasenfratz, A. Li, M. Ogilvie, P. Orland, W. Polyzou, C.
Pryor, V. Rodgers, T. Tomboulis, and X.-G. Wen, for valuable
conversations and suggestions.
NR 36
TC 11
Z9 11
U1 1
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD SEP 3
PY 2013
VL 88
IS 5
AR 056005
DI 10.1103/PhysRevD.88.056005
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 211GG
UT WOS:000323893400016
ER
PT J
AU Schneider, AR
Geissler, PL
AF Schneider, Anna R.
Geissler, Phillip L.
TI Coexistence of Fluid and Crystalline Phases of Proteins in
Photosynthetic Membranes
SO BIOPHYSICAL JOURNAL
LA English
DT Article
ID LIGHT-HARVESTING COMPLEX; PHOTOSYSTEM-II SUPERCOMPLEX; HIGHER-PLANT
CHLOROPLASTS; GRANA MEMBRANES; THYLAKOID MEMBRANE; SUPRAMOLECULAR
ORGANIZATION; MACRO-ORGANIZATION; STATE TRANSITIONS; GREEN PLANTS;
ARABIDOPSIS-THALIANA
AB Photosystem II (PSII) and its associated light-harvesting complex II (LHCII) are highly concentrated in the stacked grana regions of photosynthetic thylakoid membranes. PSII-LHCII supercomplexes can be arranged in disordered packings, ordered arrays, or mixtures thereof. The physical driving forces underlying array formation are unknown, complicating attempts to determine a possible functional role for arrays in regulating light harvesting or energy conversion efficiency. Here, we introduce a coarse-grained model of protein interactions in coupled photosynthetic membranes, focusing on just two particle types that feature simple shapes and potential energies motivated by structural studies. Reporting on computer simulations of the model's equilibrium fluctuations, we demonstrate its success in reproducing diverse structural features observed in experiments, including extended PSII-LHCII arrays. Free energy calculations reveal that the appearance of arrays marks a phase transition from the disordered fluid state to a system-spanning crystal. The predicted region of fluid-crystal coexistence is broad, encompassing much of the physiologically relevant parameter regime; we propose experiments that could test this prediction. Our results suggest that grana membranes lie at or near phase coexistence, conferring significant structural and functional flexibility to this densely packed membrane protein system.
C1 [Schneider, Anna R.] Univ Calif Berkeley, Biophys Grad Grp, Berkeley, CA 94720 USA.
[Geissler, Phillip L.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Geissler, Phillip L.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
[Geissler, Phillip L.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Geissler, PL (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM geissler@berkeley.edu
FU Office of Science of the U. S. Department of Energy [DE-AC02-05CH11231];
National Science Foundation
FX Some computations were performed using resources of the National Energy
Research Scientific Computing Center, which is supported by the Office
of Science of the U. S. Department of Energy under contract No.
DE-AC02-05CH11231. A.R.S. was supported in part by a National Science
Foundation Graduate Research Fellowship.
NR 75
TC 9
Z9 9
U1 1
U2 35
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD SEP 3
PY 2013
VL 105
IS 5
BP 1161
EP 1170
DI 10.1016/j.bpj.2013.06.052
PG 10
WC Biophysics
SC Biophysics
GA 212NP
UT WOS:000323990400009
PM 24010659
ER
PT J
AU Chiu, CC
Singh, S
de Pablo, JJ
AF Chiu, Chi-cheng
Singh, Sadanand
de Pablo, Juan J.
TI Effect of Proline Mutations on the Monomer Conformations of Amylin
SO BIOPHYSICAL JOURNAL
LA English
DT Article
ID ISLET AMYLOID POLYPEPTIDE; MOLECULAR-DYNAMICS METHOD; TYPE-2
DIABETES-MELLITUS; ALPHA-HELICAL STATES; PARTICLE MESH EWALD; INSULAR
AMYLOIDOSIS; FIBRIL FORMATION; RAT AMYLIN; HUMAN IAPP; PRAMLINTIDE
AB The formation of human islet amyloid polypeptide (hIAPP) is implicated in the loss of pancreatic beta-cells in type II diabetes. Rat amylin, which differs from human amylin at six residues, does not lead to formation of amyloid fibrils. Pramlintide is a synthetic analog of human amylin that shares three proline substitutions with rat amylin. Pramlintide has a much smaller propensity to form amyloid aggregates and has been widely prescribed in amylin replacement treatment. It is known that the three prolines attenuate beta-sheet formation. However, the detailed effects of these proline substitutions on full-length hIAPP remain poorly understood. In this work, we use molecular simulations and bias-exchange metadynamics to investigate the effect of proline substitutions on the conformation of the hIAPP monomer. Our results demonstrate that hIAPP can adopt various beta-sheet conformations, some of which have been reported in experiments. The proline substitutions perturb the formation of long beta-sheets and reduce their stability. More importantly, we find that all three proline substitutions of pramlintide are required to inhibit beta conformations and stabilize the alpha-helical conformation. Fewer substitutions do not have a significant inhibiting effect.
C1 [Chiu, Chi-cheng; de Pablo, Juan J.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Chiu, Chi-cheng; de Pablo, Juan J.] Univ Chicago, Inst Mol Engn, Chicago, IL 60637 USA.
[Singh, Sadanand] Univ Wisconsin, Dept Chem & Biol Engn, Madison, WI USA.
RP de Pablo, JJ (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM depablo@uchicago.edu
FU Office of Basic Energy Sciences, U.S. Department of Energy
[DE-AC02-06CH11357]; National Institutes of Health [1R01DK088184]
FX The authors are grateful to James L. Skinner and Martin T. Zanni for
fruitful discussions. This work was supported by the Office of Basic
Energy Sciences, U.S. Department of Energy, under contract No.
DE-AC02-06CH11357, and the National Institutes of Health under grant No.
1R01DK088184.
NR 74
TC 20
Z9 20
U1 2
U2 49
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0006-3495
EI 1542-0086
J9 BIOPHYS J
JI Biophys. J.
PD SEP 3
PY 2013
VL 105
IS 5
BP 1227
EP 1235
DI 10.1016/j.bpj.2013.07.029
PG 9
WC Biophysics
SC Biophysics
GA 212NP
UT WOS:000323990400016
PM 24010666
ER
PT J
AU Borysov, SS
Platz, D
de Wijn, AS
Forchheimer, D
Tolen, EA
Balatsky, AV
Haviland, DB
AF Borysov, Stanislav S.
Platz, Daniel
de Wijn, Astrid S.
Forchheimer, Daniel
Tolen, Eric A.
Balatsky, Alexander V.
Haviland, David B.
TI Reconstruction of tip-surface interactions with multimodal
intermodulation atomic force microscopy
SO PHYSICAL REVIEW B
LA English
DT Article
ID LATERAL FORCE; CANTILEVERS; MODE; SPECTROSCOPY; MOTION; FLUIDS
AB We propose a theoretical framework for reconstructing tip-surface interactions using the intermodulation technique when more than one eigenmode is required to describe the cantilever motion. Two particular cases of bimodal motion are studied numerically: one bending and one torsional mode, and two bending modes. We demonstrate the possibility of accurate reconstruction of a two-dimensional conservative force field for the former case, while dissipative forces are studied for the latter.
C1 [Borysov, Stanislav S.; Platz, Daniel; Forchheimer, Daniel; Haviland, David B.] KTH Royal Inst Technol, SE-10691 Stockholm, Sweden.
[Borysov, Stanislav S.; Balatsky, Alexander V.] KTH Royal Inst Technol, Nordita, SE-10691 Stockholm, Sweden.
[Borysov, Stanislav S.; Balatsky, Alexander V.] Stockholm Univ, SE-10691 Stockholm, Sweden.
[de Wijn, Astrid S.] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden.
[Tolen, Eric A.] Intermodulat Prod AB, SE-16958 Solna, Sweden.
[Balatsky, Alexander V.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Balatsky, Alexander V.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
RP Borysov, SS (reprint author), KTH Royal Inst Technol, Roslagstullsbacken 21, SE-10691 Stockholm, Sweden.
EM borysov@kth.se
OI Forchheimer, Daniel/0000-0003-0675-974X; de Wijn, Astrid
S./0000-0003-4664-6811
FU Nordita; DOE; VR VCB [621-2012-2983]; Knut and Allice Wallenberg
Foundation; Olle Enqvist Foundation
FX This work is supported by Nordita, DOE, VR VCB 621-2012-2983, the Knut
and Allice Wallenberg Foundation, and the Olle Enqvist Foundation.
NR 66
TC 8
Z9 8
U1 1
U2 36
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD SEP 3
PY 2013
VL 88
IS 11
AR 115405
DI 10.1103/PhysRevB.88.115405
PG 11
WC Physics, Condensed Matter
SC Physics
GA 211FO
UT WOS:000323891100012
ER
PT J
AU Peng, HW
Scanlon, DO
Stevanovic, V
Vidal, J
Watson, GW
Lany, S
AF Peng, Haowei
Scanlon, David O.
Stevanovic, Vladan
Vidal, Julien
Watson, Graeme W.
Lany, Stephan
TI Convergence of density and hybrid functional defect calculations for
compound semiconductors
SO PHYSICAL REVIEW B
LA English
DT Article
ID AUGMENTED-WAVE METHOD; ELECTRON-GAS; EXCHANGE; ENERGY
AB Recent revisions of defect formation energy calculations based on bandgap corrected hybrid functionals have raised concerns about the validity of earlier results based on standard density functionals and about the reliability of the theoretical prediction of electrical properties in semiconductor materials in general. We show here that a close agreement between the two types of functionals can be achieved by determining appropriate values for the electronic and atomic reference energies, thereby mitigating uncertainties associated with the choice of the underlying functional.
C1 [Peng, Haowei; Stevanovic, Vladan; Lany, Stephan] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Scanlon, David O.] UCL, Kathleen Lonsdale Mat Chem, Dept Chem, London WC1H 0AJ, England.
[Scanlon, David O.] Diamond Light Source Ltd, Didcot OX11 0DE, Oxon, England.
[Stevanovic, Vladan] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA.
[Vidal, Julien] Chim ParisTech, EDF R&D, UMR CNRS 7174, IRDEP, F-78401 Chatou, France.
[Watson, Graeme W.] Univ Dublin Trinity Coll, Sch Chem, Dublin 2, Ireland.
[Watson, Graeme W.] Univ Dublin Trinity Coll, CRANN, Dublin 2, Ireland.
RP Peng, HW (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
RI Scanlon, David/B-1516-2008; Peng, Haowei/K-4654-2012; Watson,
Graeme/B-4262-2008;
OI Scanlon, David/0000-0001-9174-8601; Peng, Haowei/0000-0002-6502-8288;
Watson, Graeme/0000-0001-6732-9474; Lany, Stephan/0000-0002-8127-8885
FU NREL; CSM; U.S. Department of Energy, Office of Energy Efficiency and
Renewable Energy, Next Generation Photovoltaics II (SunShot initiative)
[DE-AC36-08GO28308]; SFI through the PI programme (PI) [06/IN.1/I92,
06/IN.1/I92/EC07]; UCL; Ramsay Memorial Trust; UCL Ramsay Fellowship;
EPSRC [EP/F067496]
FX Financial support: For NREL and CSM (H. P., V. S., and S. L.), the U.S.
Department of Energy, Office of Energy Efficiency and Renewable Energy,
Next Generation Photovoltaics II (SunShot initiative), under Contract
No. DE-AC36-08GO28308 to NREL. For TCD (D.O.S and G. W. W.), the SFI
through the PI programme (PI Grant Nos. 06/IN.1/I92 and
06/IN.1/I92/EC07). UCL (D.O.S.), Ramsay Memorial Trust and UCL Ramsay
Fellowship. High performance computing resources: RedMesa by NREL's
Computational Science Center, Kelvin by TCHPC, the Stokes cluster by
ICHEC, and HECToR through membership of the HPC Materials Chemistry
Consortium under EPSRC (Grant No. EP/F067496). Administrative support:
For V.S., REMRSEC at CSM.
NR 49
TC 27
Z9 27
U1 3
U2 51
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD SEP 3
PY 2013
VL 88
IS 11
AR 115201
DI 10.1103/PhysRevB.88.115201
PG 7
WC Physics, Condensed Matter
SC Physics
GA 211FO
UT WOS:000323891100006
ER
PT J
AU Staar, P
Maier, T
Schulthess, TC
AF Staar, Peter
Maier, Thomas
Schulthess, Thomas C.
TI Dynamical cluster approximation with continuous lattice self-energy
SO PHYSICAL REVIEW B
LA English
DT Article
ID MEAN-FIELD THEORY; STRONGLY CORRELATED SYSTEMS; ELECTRONIC-STRUCTURE;
FUNCTIONAL APPROACH; DELTA-PLUTONIUM; TRANSITION; SPECTRA;
SUPERCONDUCTIVITY; DIMENSIONS
AB The dynamical cluster approximation (DCA) is a systematic extension beyond the single-site approximation in dynamical mean field theory, to include spatially nonlocal correlations in quantum many-body simulations of strongly correlated systems. We extend the DCA with a continuous lattice self-energy in order to achieve better convergence with cluster size. This method, which we call DCA(+), cures the cluster-shape dependence problems of the DCA, without suffering from causality violations of previous attempts to interpolate the cluster self-energy. A practical approach based on standard inference techniques is given to deduce the continuous lattice self-energy from an interpolated cluster self-energy. We study the pseudogap region of a hole-doped two-dimensional Hubbard model and find that, in the DCA(+) algorithm, the self-energy and pseudogap temperature T* converge monotonously with cluster size. Introduction of a continuous lattice self-energy eliminates artificial long-range correlations and thus significantly reduces the sign problem of the quantum Monte Carlo cluster solver in the DCA(+) algorithm compared to the normal DCA. Simulations with much larger cluster sizes thus become feasible, which, along with the improved convergence in cluster size, raises hope that precise extrapolations to the exact infinite cluster size limit can be reached for other physical quantities as well.
C1 [Staar, Peter; Schulthess, Thomas C.] Swiss Fed Inst Technol, Inst Theoret Phys, CH-8093 Zurich, Switzerland.
[Maier, Thomas; Schulthess, Thomas C.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
[Maier, Thomas] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Schulthess, Thomas C.] Swiss Fed Inst Technol, Swiss Natl Supercomp Ctr, CH-6900 Lugano, Switzerland.
RP Staar, P (reprint author), Swiss Fed Inst Technol, Inst Theoret Phys, CH-8093 Zurich, Switzerland.
RI Maier, Thomas/F-6759-2012
OI Maier, Thomas/0000-0002-1424-9996
FU Office of Science [DE-AC05-00OR22725]; Scientific User Facilities
Division, Office of Basic Energy Sciences, of the Department of Energy
FX This research was carried out with resources of the Swiss National
Supercomputing Center (CSCS), Oak Ridge Leadership Computing Facility
(OLCF), and the Center for Nanophase Materials Sciences (CNMS). OLCF and
CNMS are located at Oak Ridge National Laboratory and supported,
respectively, by the Office of Science under Contract No.
DE-AC05-00OR22725 and by the Scientific User Facilities Division, Office
of Basic Energy Sciences, of the Department of Energy.
NR 60
TC 9
Z9 9
U1 0
U2 16
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD SEP 3
PY 2013
VL 88
IS 11
AR 115101
DI 10.1103/PhysRevB.88.115101
PG 16
WC Physics, Condensed Matter
SC Physics
GA 211FO
UT WOS:000323891100001
ER
PT J
AU Ross, TJ
Hughes, RO
Beausang, CW
Allmond, JM
Angell, CT
Basunia, MS
Bleuel, DL
Burke, JT
Casperson, RJ
Escher, JE
Fallon, P
Hatarik, R
Munson, J
Paschalis, S
Petri, M
Phair, LW
Ressler, JJ
Scielzo, ND
AF Ross, T. J.
Hughes, R. O.
Beausang, C. W.
Allmond, J. M.
Angell, C. T.
Basunia, M. S.
Bleuel, D. L.
Burke, J. T.
Casperson, R. J.
Escher, J. E.
Fallon, P.
Hatarik, R.
Munson, J.
Paschalis, S.
Petri, M.
Phair, L. W.
Ressler, J. J.
Scielzo, N. D.
TI Remnants of spherical shell structures in deformed nuclei: The impact of
an N=64 neutron subshell closure on the structure of N approximate to 90
gadolinium nuclei
SO PHYSICAL REVIEW C
LA English
DT Article
ID SINGLE-PARTICLE STATES; DATA SHEETS; CHARGE RADII; ISOTOPES; SM-153
AB Odd-mass gadolinium isotopes around N = 90 were populated by the (p,d) reaction, utilizing 25-MeV protons, resulting in population of low-spin quasineutron states at energies near and below the Fermi surface. Systematics of the single quasineutron levels populated are presented. A large excitation energy gap is observed between levels originating from the 2d(3/2), 1h(11/2), and 3s(1/2) spherical parents (above the N = 64 gap), and the 2d(5/2) (below the gap), indicating that the spherical shell model level spacing is maintained at least to moderate deformations.
C1 [Ross, T. J.; Hughes, R. O.; Beausang, C. W.] Univ Richmond, Dept Phys, Richmond, VA 23173 USA.
[Ross, T. J.] Univ Surrey, Dept Phys, Guildford GU2 7JL, Surrey, England.
[Allmond, J. M.] Oak Ridge Natl Lab, JIHIR, Oak Ridge, TN 37831 USA.
[Angell, C. T.; Munson, J.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
[Basunia, M. S.; Fallon, P.; Hatarik, R.; Paschalis, S.; Petri, M.; Phair, L. W.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
[Bleuel, D. L.; Burke, J. T.; Casperson, R. J.; Escher, J. E.; Ressler, J. J.; Scielzo, N. D.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Ross, TJ (reprint author), Univ Kentucky, Dept Chem, Lexington, KY 40506 USA.
RI Burke, Jason/I-4580-2012; Petri, Marina/H-4630-2016; Paschalis,
Stefanos/H-8758-2016;
OI Petri, Marina/0000-0002-3740-6106; Paschalis,
Stefanos/0000-0002-9113-3778; Angell, Christopher/0000-0003-0333-6557
FU National Science Foundation; US Department of Energy; University of
Richmond [DE-FG52-06NA26206, DE-FG02-05ER41379]; Lawrence Livermore
National Laboratory [W-7405-Eng-48, DE-AC52-07NA27344]; Lawrence
Berkeley National Laboratory [DE-AC02-05CH11231]; Lawrence Berkeley
National Laboratory through the TORUS topical collaboration
FX The authors thank the 88-Inch Cyclotron operations and facilities staff
for their help in performing this experiment. This work was performed
under the auspices of the National Science Foundation and the US
Department of Energy by the University of Richmond under Grants No.
DE-FG52-06NA26206 and No. DE-FG02-05ER41379, Lawrence Livermore National
Laboratory under Contracts No. W-7405-Eng-48 and No. DE-AC52-07NA27344,
and Lawrence Berkeley National Laboratory under Contract No.
DE-AC02-05CH11231 with partial support through the TORUS topical
collaboration.
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD SEP 3
PY 2013
VL 88
IS 3
AR 031301
DI 10.1103/PhysRevC.88.031301
PG 4
WC Physics, Nuclear
SC Physics
GA 211GE
UT WOS:000323893200001
ER
PT J
AU Rzaca-Urban, T
Czerwinski, M
Urban, W
Smith, AG
Ahmad, I
Nowacki, F
Sieja, K
AF Rzaca-Urban, T.
Czerwinski, M.
Urban, W.
Smith, A. G.
Ahmad, I.
Nowacki, F.
Sieja, K.
TI First observation of excited states in Se-87: Collectivity and j-1
anomaly at N=53
SO PHYSICAL REVIEW C
LA English
DT Article
ID NUCLEAR-DATA SHEETS; SHELL-MODEL; ALAGA MODEL; ISOTOPES; FISSION; REGION
AB The Se-87 nucleus has been studied via prompt gamma-ray spectroscopy using the Eurogam2 Ge array to measure gamma rays following fission of Cm-248. Excited levels in Se-87 have been observed for the first time. The yrast excitation scheme in this nucleus is similar to the excitations schemes of its N = 53 neighbors and fits the energy systematics, indicating j - 1 anomaly below Z = 38. Large-scale shell-model calculations reproduce in detail yrast excitations in Se-87 and other N = 53 isotones. The j - 1 anomaly is explained as due to the enhancement of collectivity towards the proton midshell. The coexistence of collective and single-particle excitations is predicted in Se-87.
C1 [Rzaca-Urban, T.; Czerwinski, M.; Urban, W.] Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland.
[Smith, A. G.] Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England.
[Ahmad, I.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Nowacki, F.; Sieja, K.] Univ Strasbourg, IPHC, F-67037 Strasbourg, France.
[Nowacki, F.; Sieja, K.] CNRS, UMR7178, F-67037 Strasbourg, France.
RP Rzaca-Urban, T (reprint author), Univ Warsaw, Fac Phys, Ulica Hoza 69, PL-00681 Warsaw, Poland.
FU US Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]
FX This work has been partially supported by the US Department of Energy,
Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357. The
authors are indebted for the use of 248Cm to the Office of
Basic Energy Sciences, Department of Energy, through the transplutonium
element production facilities at the Oak Ridge National Laboratory.
NR 36
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SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD SEP 3
PY 2013
VL 88
IS 3
AR 034302
DI 10.1103/PhysRevC.88.034302
PG 5
WC Physics, Nuclear
SC Physics
GA 211GE
UT WOS:000323893200003
ER
PT J
AU Sharapov, EI
Morris, CL
Makela, M
Saunders, A
Adamek, ER
Bagdasarova, Y
Broussard, LJ
Cude-Woods, CB
Fellers, DE
Geltenbort, P
Hasan, SI
Hickerson, KP
Hogan, G
Holley, AT
Liu, CY
Mendenhall, MP
Ortiz, J
Pattie, RW
Phillips, DG
Ramsey, J
Salvat, DJ
Seestrom, SJ
Shaw, E
Sjue, SKL
Sondheim, WE
VornDick, B
Wang, Z
Womack, TL
Young, AR
Zeck, BA
AF Sharapov, E. I.
Morris, C. L.
Makela, M.
Saunders, A.
Adamek, Evan R.
Bagdasarova, Y.
Broussard, L. J.
Cude-Woods, C. B.
Fellers, Deion E.
Geltenbort, Peter
Hasan, S. I.
Hickerson, K. P.
Hogan, G.
Holley, A. T.
Liu, Chen-Yu
Mendenhall, M. P.
Ortiz, J.
Pattie, R. W., Jr.
Phillips, D. G., II
Ramsey, J.
Salvat, D. J.
Seestrom, S. J.
Shaw, E.
Sjue, S. K. L.
Sondheim, W. E.
VornDick, B.
Wang, Z.
Womack, T. L.
Young, A. R.
Zeck, B. A.
TI Measurements of ultracold neutron upscattering and absorption in
polyethylene and vanadium
SO PHYSICAL REVIEW C
LA English
DT Article
ID SURFACE
AB The study of neutron cross sections for elements used as efficient "absorbers" of ultracold neutrons (UCN) is crucial for many precision experiments in nuclear and particle physics, cosmology and gravity. In this context, "absorption" includes both the capture and upscattering of neutrons to the energies above the UCN energy region. The available data, especially for hydrogen, do not agree between themselves or with the theory. In this report we describe measurements performed at the Los Alamos National Laboratory UCN facility of the UCN upscattering cross sections for vanadium and for hydrogen in CH2 using simultaneous measurements of the radiative capture cross sections for these elements. We measured sigma(up) = 1972 +/- 130 b for hydrogen in CH2, which is below theoretical expectations, and sigma(up) = 25 +/- 9 b for vanadium, in agreement with the expectation for the neutron heating by thermal excitations in solids.
C1 [Sharapov, E. I.] Joint Inst Nucl Res, Dubna 141980, Russia.
[Morris, C. L.; Makela, M.; Saunders, A.; Bagdasarova, Y.; Broussard, L. J.; Fellers, Deion E.; Hogan, G.; Ortiz, J.; Ramsey, J.; Seestrom, S. J.; Shaw, E.; Sjue, S. K. L.; Sondheim, W. E.; Wang, Z.; Womack, T. L.] Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
[Adamek, Evan R.; Cude-Woods, C. B.; Holley, A. T.; Liu, Chen-Yu; Salvat, D. J.] Indiana Univ, Dept Phys, Indiana, PA USA.
[Geltenbort, Peter] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France.
[Hasan, S. I.] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
[Hickerson, K. P.; Mendenhall, M. P.] CALTECH, Kellogg Radiat Lab, Pasadena, CA 91125 USA.
[Pattie, R. W., Jr.; Phillips, D. G., II; VornDick, B.; Young, A. R.; Zeck, B. A.] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA.
RP Morris, CL (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA.
EM morris@lanl.gov
OI Broussard, Leah/0000-0001-9182-2808; Makela, Mark/0000-0003-0592-3683;
Morris, Christopher/0000-0003-2141-0255
FU US Department of Energy [DE-AC52-06NA25396]; DOE Office of Science
Graduate Fellowship Program (DOE SCGF); ORISE-ORAU [DE-AC05-06OR23100]
FX This work was performed under the auspices of the US Department of
Energy under Contract No. DE-AC52-06NA25396. D.J.S. is supported by the
DOE Office of Science Graduate Fellowship Program (DOE SCGF), made
possible in part by the American Recovery and Reinvestment Act of 2009,
administered by ORISE-ORAU under contract no. DE-AC05-06OR23100.
NR 16
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U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD SEP 3
PY 2013
VL 88
IS 3
AR UNSP 037601
DI 10.1103/PhysRevC.88.037601
PG 4
WC Physics, Nuclear
SC Physics
GA 211GE
UT WOS:000323893200008
ER
PT J
AU Bousso, R
Hall, L
AF Bousso, Raphael
Hall, Lawrence
TI Why comparable? A multiverse explanation of the dark matter-baryon
coincidence
SO PHYSICAL REVIEW D
LA English
DT Article
ID MASS; PARTICLES; MODEL
AB The densities of dark and baryonic matter are comparable: zeta rho(D)/rho(B) similar to O(1). This is surprising because they are controlled by different combinations of low-energy physics parameters. Here we consider the probability distribution over zeta in the landscape. We argue that the Why Comparable problem can be solved without detailed anthropic assumptions, and independently of the nature of dark matter. Overproduction of dark matter suppresses the probability like (1 + zeta)(-1), if the causal patch is used to regulate infinities. This suppression can counteract a prior distribution favoring large zeta, selecting zeta similar to O(1). This effect not only explains the Why Comparable coincidence but also renders otherwise implausible models of dark matter viable. For the special case of axion dark matter, Wilczek and independently Freivogel have already noted that a (1 + zeta)(-1) suppression prevents overproduction of a GUT-scale QCD axion. If the dark matter is the LSP, the effect can explain the moderate fine-tuning of the weak scale in simple supersymmetric models.
C1 [Bousso, Raphael] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Ctr Theoret Phys, Berkeley, CA 94720 USA.
Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Bousso, R (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
FU Berkeley Center for Theoretical Physics; National Science Foundation
[1002399, 0855653, 0756174]; fqxi Grant [RFP3-1004]; fqxi Grant
"Multiverse Predictions for the LHC"; New Frontiers in Astronomy and
Cosmology; U.S. Department of Energy [DE-AC02-05CH11231]
FX We thank Roni Harnik and Yasunori Nomura for discussions. This work was
supported by the Berkeley Center for Theoretical Physics, by the
National Science Foundation (Grants No. 1002399, No. 0855653, and No.
0756174), by fqxi Grant No. RFP3-1004, by fqxi Grant "Multiverse
Predictions for the LHC," by "New Frontiers in Astronomy and Cosmology,"
and by the U.S. Department of Energy under Contract No.
DE-AC02-05CH11231.
NR 40
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PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD SEP 3
PY 2013
VL 88
IS 6
AR 063503
DI 10.1103/PhysRevD.88.063503
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 211GM
UT WOS:000323894000007
ER
PT J
AU del Campo, A
AF del Campo, Adolfo
TI Shortcuts to Adiabaticity by Counterdiabatic Driving
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DYNAMICS; STATES; TRAPS
AB The evolution of a system induced by counterdiabatic driving mimics the adiabatic dynamics without the requirement of slow driving. Engineering it involves diagonalizing the instantaneous Hamiltonian of the system and results in the need of auxiliary nonlocal interactions for matter waves. Here, experimentally realizable driving protocols are found for a large class of single-particle, many-body, and nonlinear systems without demanding the spectral properties as an input. The method is applied to the fast decompression of Bose-Einstein condensates in different trapping potentials.
C1 [del Campo, Adolfo] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[del Campo, Adolfo] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
RP del Campo, A (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RI del Campo, Adolfo/B-8439-2009
OI del Campo, Adolfo/0000-0003-2219-2851
FU U.S. Department of Energy through the LANL/LDRD Program; LANL J. Robert
Oppenheimer fellowship
FX The author would like to thank E. Passemar, D. Roy, and N. Sinitsyn for
insightful discussions. This work is supported by the U.S. Department of
Energy through the LANL/LDRD Program and LANL J. Robert Oppenheimer
fellowship support.
NR 42
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PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD SEP 3
PY 2013
VL 111
IS 10
AR 100502
DI 10.1103/PhysRevLett.111.100502
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 211HW
UT WOS:000323898300006
PM 25166641
ER
PT J
AU Jin, WC
Yeh, PC
Zaki, N
Zhang, DT
Sadowski, JT
Al-Mahboob, A
van der Zande, AM
Chenet, DA
Dadap, JI
Herman, IP
Sutter, P
Hone, J
Osgood, RM
AF Jin, Wencan
Yeh, Po-Chun
Zaki, Nader
Zhang, Datong
Sadowski, Jerzy T.
Al-Mahboob, Abdullah
van der Zande, Arend M.
Chenet, Daniel A.
Dadap, Jerry I.
Herman, Irving P.
Sutter, Peter
Hone, James
Osgood, Richard M., Jr.
TI Direct Measurement of the Thickness-Dependent Electronic Band Structure
of MoS2 Using Angle-Resolved Photoemission Spectroscopy
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SINGLE-LAYER MOS2; TRANSITION-METAL DICHALCOGENIDES; MONOLAYER MOS2;
MICROSCOPY; GRAPHENE
AB We report on the evolution of the thickness-dependent electronic band structure of the two-dimensional layered-dichalcogenide molybdenum disulfide (MoS2). Micrometer-scale angle-resolved photoemission spectroscopy of mechanically exfoliated and chemical-vapor-deposition-grown crystals provides direct evidence for the shifting of the valence band maximum from (Gamma) over bar to (K) over bar, for the case of MoS2 having more than one layer, to the case of single-layer MoS2, as predicted by density functional theory. This evolution of the electronic structure from bulk to few-layer to monolayer MoS2 had earlier been predicted to arise from quantum confinement. Furthermore, one of the consequences of this progression in the electronic structure is the dramatic increase in the hole effective mass, in going from bulk to monolayer MoS2 at its Brillouin zone center, which is known as the cause for the decreased carrier mobility of the monolayer form compared to that of bulk MoS2.
C1 [Jin, Wencan; Zhang, Datong; Dadap, Jerry I.; Herman, Irving P.; Osgood, Richard M., Jr.] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA.
[Yeh, Po-Chun; Zaki, Nader; Osgood, Richard M., Jr.] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA.
[Sadowski, Jerzy T.; Al-Mahboob, Abdullah; Sutter, Peter] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
[van der Zande, Arend M.] Columbia Univ, Energy Frontier Res Ctr, New York, NY 10027 USA.
[van der Zande, Arend M.; Chenet, Daniel A.; Hone, James] Columbia Univ, Dept Mech Engn, New York, NY 10027 USA.
RP Jin, WC (reprint author), Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA.
EM osgood@columbia.edu
RI Hone, James/E-1879-2011; van der Zande, Arend/C-1989-2016;
OI Hone, James/0000-0002-8084-3301; van der Zande,
Arend/0000-0001-5104-9646; Sadowski, Jerzy/0000-0002-4365-7796
FU U.S. Department of Energy [DE-FG 02-04-ER-46157]; U.S. Department of
Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]; Center for
Redefining Photovoltaic Efficiency through Molecular-Scale Control; U.S.
Department of Energy ( DOE), Office of Science, Office of Basic Energy
Sciences [DE-SC0001085]
FX We acknowledge very useful discussions with Chris A. Marianetti and
Philip Kim. This work was financially supported by the U.S. Department
of Energy under Contract No. DE-FG 02-04-ER-46157. Research carried out
in part at the Center for Functional Nanomaterials and National
Synchrotron Light Source, Brookhaven National Laboratory, which are
supported by the U.S. Department of Energy, Office of Basic Energy
Sciences, under Contract No. DE-AC02-98CH10886. D.Z., A.M.Z., D. C., I.
P. H., and J.H. were supported as part of the Center for Redefining
Photovoltaic Efficiency through Molecular-Scale Control, an Energy
Frontier Research Center funded by the U.S. Department of Energy ( DOE),
Office of Science, Office of Basic Energy Sciences under Award No.
DE-SC0001085.
NR 31
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U2 249
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD SEP 3
PY 2013
VL 111
IS 10
AR 106801
DI 10.1103/PhysRevLett.111.106801
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 211HW
UT WOS:000323898300016
PM 25166690
ER
PT J
AU Lees, JP
Poireau, V
Tisserand, V
Grauges, E
Palano, A
Eigen, G
Stugu, B
Brown, DN
Kerth, LT
Kolomensky, YG
Lee, MJ
Lynch, G
Koch, H
Schroeder, T
Hearty, C
Mattison, TS
McKenna, JA
So, RY
Khan, A
Blinov, VE
Buzykaev, AR
Druzhinin, VP
Golubev, VB
Kravchenko, EA
Onuchin, AP
Serednyakov, SI
Skovpen, YI
Solodov, EP
Todyshev, KY
Yushkov, AN
Kirkby, D
Lankford, AJ
Mandelkern, M
Dey, B
Gary, JW
Long, O
Vitug, GM
Campagnari, C
Sevilla, MF
Hong, TM
Kovalskyi, D
Richman, JD
West, CA
Eisner, AM
Lockman, WS
Martinez, AJ
Schumm, BA
Seiden, A
Chao, DS
Cheng, CH
Echenard, B
Flood, KT
Hitlin, DG
Ongmongkolkul, P
Porter, FC
Andreassen, R
Huard, Z
Meadows, BT
Sokoloff, MD
Sun, L
Bloom, PC
Ford, WT
Gaz, A
Nauenberg, U
Smith, JG
Wagner, SR
Ayad, R
Toki, WH
Spaan, B
Schubert, KR
Schwierz, R
Bernard, D
Verderi, M
Playfer, S
Bettoni, D
Bozzi, C
Calabrese, R
Cibinetto, G
Fioravanti, E
Garzia, I
Luppi, E
Piemontese, L
Santoro, V
Baldini-Ferroli, R
Calcaterra, A
de Sangro, R
Finocchiaro, G
Martellotti, S
Patteri, P
Peruzzi, IM
Piccolo, M
Rama, M
Zallo, A
Contri, R
Guido, E
Lo Vetere, M
Monge, MR
Passaggio, S
Patrignani, C
Robutti, E
Bhuyan, B
Prasad, V
Morii, M
Adametz, A
Uwer, U
Lacker, HM
Dauncey, PD
Mallik, U
Chen, C
Cochran, J
Meyer, WT
Prell, S
Rubin, AE
Gritsan, AV
Arnaud, N
Davier, M
Derkach, D
Grosdidier, G
Le Diberder, F
Lutz, AM
Malaescu, B
Roudeau, P
Stocchi, A
Wormser, G
Lange, DJ
Wright, DM
Coleman, JP
Fry, JR
Gabathuler, E
Hutchcroft, DE
Payne, DJ
Touramanis, C
Bevan, AJ
Di Lodovico, F
Sacco, R
Cowan, G
Bougher, J
Brown, DN
Davis, CL
Denig, AG
Fritsch, M
Gradl, W
Griessinger, K
Hafner, A
Prencipe, E
Barlow, RJ
Lafferty, GD
Behn, E
Cenci, R
Hamilton, B
Jawahery, A
Roberts, DA
Cowan, R
Dujmic, D
Sciolla, G
Cheaib, R
Patel, PM
Robertson, SH
Biassoni, P
Neri, N
Palombo, F
Cremaldi, L
Godang, R
Sonnek, P
Summers, DJ
Nguyen, X
Simard, M
Taras, P
De Nardo, G
Monorchio, D
Onorato, G
Sciacca, C
Martinelli, M
Raven, G
Jessop, CP
LoSecco, JM
Honscheid, K
Kass, R
Brau, J
Frey, R
Sinev, NB
Strom, D
Torrence, E
Feltresi, E
Margoni, M
Morandin, M
Posocco, M
Rotondo, M
Simi, G
Simonetto, F
Stroili, R
Akar, S
Ben-Haim, E
Bomben, M
Bonneaud, GR
Briand, H
Calderini, G
Chauveau, J
Leruste, P
Marchiori, G
Ocariz, J
Sitt, S
Biasini, M
Manoni, E
Pacetti, S
Rossi, A
Angelini, C
Batignani, G
Bettarini, S
Carpinelli, M
Casarosa, G
Cervelli, A
Forti, F
Giorgi, MA
Lusiani, A
Oberhof, B
Paoloni, E
Perez, A
Rizzo, G
Walsh, JJ
Pegna, DL
Olsen, J
Smith, AJS
Faccini, R
Ferrarotto, F
Ferroni, F
Gaspero, M
Gioi, LL
Piredda, G
Buenger, C
Gruenberg, O
Hartmann, T
Leddig, T
Voss, C
Waldi, R
Adye, T
Olaiya, EO
Wilson, FF
Emery, S
de Monchenault, GH
Vasseur, G
Yeche, C
Anulli, F
Aston, D
Bard, DJ
Benitez, JF
Cartaro, C
Convery, MR
Dorfan, J
Dubois-Felsmann, GP
Dunwoodie, W
Ebert, M
Field, RC
Fulsom, BG
Gabareen, AM
Graham, MT
Hast, C
Innes, WR
Kim, P
Kocian, ML
Leith, DWGS
Lewis, P
Lindemann, D
Lindquist, B
Luitz, S
Luth, V
Lynch, HL
MacFarlane, DB
Muller, DR
Neal, H
Nelson, S
Perl, M
Pulliam, T
Ratcliff, BN
Roodman, A
Salnikov, AA
Schindler, RH
Snyder, A
Su, D
Sullivan, MK
Va'vra, J
Wagner, AP
Wang, WF
Wisniewski, WJ
Wittgen, M
Wright, DH
Wulsin, HW
Ziegler, V
Park, W
Purohit, MV
White, RM
Wilson, JR
Randle-Conde, A
Sekula, SJ
Bellis, M
Burchat, PR
Miyashita, TS
Puccio, EMT
Alam, MS
Ernst, JA
Gorodeisky, R
Guttman, N
Peimer, DR
Soffer, A
Spanier, SM
Ritchie, JL
Ruland, AM
Schwitters, RF
Wray, BC
Izen, JM
Lou, XC
Bianchi, F
De Mori, F
Filippi, A
Gamba, D
Zambito, S
Lanceri, L
Vitale, L
Martinez-Vidal, F
Oyanguren, A
Villanueva-Perez, P
Ahmed, H
Albert, J
Banerjee, S
Bernlochner, FU
Choi, HHF
King, GJ
Kowalewski, R
Lewczuk, MJ
Lueck, T
Nugent, IM
Roney, JM
Sobie, RJ
Tasneem, N
Gershon, TJ
Harrison, PF
Latham, TE
Band, HR
Dasu, S
Pan, Y
Prepost, R
Wu, SL
AF Lees, J. P.
Poireau, V.
Tisserand, V.
Grauges, E.
Palano, A.
Eigen, G.
Stugu, B.
Brown, D. N.
Kerth, L. T.
Kolomensky, Yu. G.
Lee, M. J.
Lynch, G.
Koch, H.
Schroeder, T.
Hearty, C.
Mattison, T. S.
McKenna, J. A.
So, R. Y.
Khan, A.
Blinov, V. E.
Buzykaev, A. R.
Druzhinin, V. P.
Golubev, V. B.
Kravchenko, E. A.
Onuchin, A. P.
Serednyakov, S. I.
Skovpen, Yu. I.
Solodov, E. P.
Todyshev, K. Yu.
Yushkov, A. N.
Kirkby, D.
Lankford, A. J.
Mandelkern, M.
Dey, B.
Gary, J. W.
Long, O.
Vitug, G. M.
Campagnari, C.
Sevilla, M. Franco
Hong, T. M.
Kovalskyi, D.
Richman, J. D.
West, C. A.
Eisner, A. M.
Lockman, W. S.
Martinez, A. J.
Schumm, B. A.
Seiden, A.
Chao, D. S.
Cheng, C. H.
Echenard, B.
Flood, K. T.
Hitlin, D. G.
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Sun, L.
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Gaz, A.
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Wagner, S. R.
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Toki, W. H.
Spaan, B.
Schubert, K. R.
Schwierz, R.
Bernard, D.
Verderi, M.
Playfer, S.
Bettoni, D.
Bozzi, C.
Calabrese, R.
Cibinetto, G.
Fioravanti, E.
Garzia, I.
Luppi, E.
Piemontese, L.
Santoro, V.
Baldini-Ferroli, R.
Calcaterra, A.
de Sangro, R.
Finocchiaro, G.
Martellotti, S.
Patteri, P.
Peruzzi, I. M.
Piccolo, M.
Rama, M.
Zallo, A.
Contri, R.
Guido, E.
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Monge, M. R.
Passaggio, S.
Patrignani, C.
Robutti, E.
Bhuyan, B.
Prasad, V.
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Uwer, U.
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Dauncey, P. D.
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Chen, C.
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Prell, S.
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Grosdidier, G.
Le Diberder, F.
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Gabathuler, E.
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Payne, D. J.
Touramanis, C.
Bevan, A. J.
Di Lodovico, F.
Sacco, R.
Cowan, G.
Bougher, J.
Brown, D. N.
Davis, C. L.
Denig, A. G.
Fritsch, M.
Gradl, W.
Griessinger, K.
Hafner, A.
Prencipe, E.
Barlow, R. J.
Lafferty, G. D.
Behn, E.
Cenci, R.
Hamilton, B.
Jawahery, A.
Roberts, D. A.
Cowan, R.
Dujmic, D.
Sciolla, G.
Cheaib, R.
Patel, P. M.
Robertson, S. H.
Biassoni, P.
Neri, N.
Palombo, F.
Cremaldi, L.
Godang, R.
Sonnek, P.
Summers, D. J.
Nguyen, X.
Simard, M.
Taras, P.
De Nardo, G.
Monorchio, D.
Onorato, G.
Sciacca, C.
Martinelli, M.
Raven, G.
Jessop, C. P.
LoSecco, J. M.
Honscheid, K.
Kass, R.
Brau, J.
Frey, R.
Sinev, N. B.
Strom, D.
Torrence, E.
Feltresi, E.
Margoni, M.
Morandin, M.
Posocco, M.
Rotondo, M.
Simi, G.
Simonetto, F.
Stroili, R.
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Ben-Haim, E.
Bomben, M.
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Briand, H.
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Leruste, Ph.
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Batignani, G.
Bettarini, S.
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Casarosa, G.
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Oberhof, B.
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Olsen, J.
Smith, A. J. S.
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Ferrarotto, F.
Ferroni, F.
Gaspero, M.
Gioi, L. Li
Piredda, G.
Buenger, C.
Gruenberg, O.
Hartmann, T.
Leddig, T.
Voss, C.
Waldi, R.
Adye, T.
Olaiya, E. O.
Wilson, F. F.
Emery, S.
de Monchenault, G. Hamel
Vasseur, G.
Yeche, Ch.
Anulli, F.
Aston, D.
Bard, D. J.
Benitez, J. F.
Cartaro, C.
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Luth, V.
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MacFarlane, D. B.
Muller, D. R.
Neal, H.
Nelson, S.
Perl, M.
Pulliam, T.
Ratcliff, B. N.
Roodman, A.
Salnikov, A. A.
Schindler, R. H.
Snyder, A.
Su, D.
Sullivan, M. K.
Va'vra, J.
Wagner, A. P.
Wang, W. F.
Wisniewski, W. J.
Wittgen, M.
Wright, D. H.
Wulsin, H. W.
Ziegler, V.
Park, W.
Purohit, M. V.
White, R. M.
Wilson, J. R.
Randle-Conde, A.
Sekula, S. J.
Bellis, M.
Burchat, P. R.
Miyashita, T. S.
Puccio, E. M. T.
Alam, M. S.
Ernst, J. A.
Gorodeisky, R.
Guttman, N.
Peimer, D. R.
Soffer, A.
Spanier, S. M.
Ritchie, J. L.
Ruland, A. M.
Schwitters, R. F.
Wray, B. C.
Izen, J. M.
Lou, X. C.
Bianchi, F.
De Mori, F.
Filippi, A.
Gamba, D.
Zambito, S.
Lanceri, L.
Vitale, L.
Martinez-Vidal, F.
Oyanguren, A.
Villanueva-Perez, P.
Ahmed, H.
Albert, J.
Banerjee, Sw.
Bernlochner, F. U.
Choi, H. H. F.
King, G. J.
Kowalewski, R.
Lewczuk, M. J.
Lueck, T.
Nugent, I. M.
Roney, J. M.
Sobie, R. J.
Tasneem, N.
Gershon, T. J.
Harrison, P. F.
Latham, T. E.
Band, H. R.
Dasu, S.
Pan, Y.
Prepost, R.
Wu, S. L.
CA BaBar Collaboration
TI Search for CP Violation in B-0-(B-0)over bar Mixing Using Partial
Reconstruction of B-0 -> D*(-)Xl(+)nu(l) and a Kaon Tag
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID BABAR DETECTOR
AB We present results of a search for CP violation in B-0-(B) over bar (0) mixing with the BABAR detector. We select a sample of B0 -> D*-Xl(+)nu decays with a partial reconstruction method and use kaon tagging to assess the flavor of the other B meson in the event. We determine the CP violating asymmetryA(CP) [N((BB0)-B-0) - N((B-0) over bar (B-0) over bar)]/[N((B-0) over bar (B-0) over bar) + N((BB0)-B-0)] = (0.06 +/- 0.17 +/- 0.38-0.32)%, corresponding to Delta(CP) = 1- vertical bar q/p vertical bar = (0.29 +/- 0.84+1.88-1.61) X 10(-3).
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RP Lees, JP (reprint author), Univ Savoie, CNRS IN2P3, LAPP, F-74941 Annecy Le Vieux, France.
RI Patrignani, Claudia/C-5223-2009; Kolomensky, Yury/I-3510-2015; Monge,
Maria Roberta/G-9127-2012; Forti, Francesco/H-3035-2011; Oyanguren,
Arantza/K-6454-2014; Luppi, Eleonora/A-4902-2015; Lo Vetere,
Maurizio/J-5049-2012; Lusiani, Alberto/N-2976-2015; White,
Ryan/E-2979-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese,
Roberto/G-4405-2015; Martinez Vidal, F*/L-7563-2014; Lusiani,
Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; Di Lodovico,
Francesca/L-9109-2016; Calcaterra, Alessandro/P-5260-2015; Frey,
Raymond/E-2830-2016
OI Patrignani, Claudia/0000-0002-5882-1747; Kolomensky,
Yury/0000-0001-8496-9975; Monge, Maria Roberta/0000-0003-1633-3195;
Forti, Francesco/0000-0001-6535-7965; Oyanguren,
Arantza/0000-0002-8240-7300; Luppi, Eleonora/0000-0002-1072-5633; Lo
Vetere, Maurizio/0000-0002-6520-4480; Lusiani,
Alberto/0000-0002-6876-3288; White, Ryan/0000-0003-3589-5900; Calabrese,
Roberto/0000-0002-1354-5400; Martinez Vidal, F*/0000-0001-6841-6035;
Lusiani, Alberto/0000-0002-6876-3288; Morandin,
Mauro/0000-0003-4708-4240; Di Lodovico, Francesca/0000-0003-3952-2175;
Calcaterra, Alessandro/0000-0003-2670-4826; Frey,
Raymond/0000-0003-0341-2636
FU DOE (U.S.); NSF (U.S.); NSERC (Canada); IHEP (China); CEA; CNRS-IN2P3
(France); BMBF; DFG (Germany); INFN (Italy); FOM (Netherlands); NFR
(Norway); MIST (Russia); MEC (Spain); PPARC (United Kingdom); Marie
Curie EIF (European Union); A. P. Sloan Foundation
FX We are grateful for the excellent luminosity and machine conditions
provided by our PEP-II colleagues, and for the substantial dedicated
effort from the computing organizations that support BABAR. The
collaborating institutions wish to thank SLAC for its support and kind
hospitality. This work is supported by DOE and NSF (U.S.), NSERC
(Canada), IHEP (China), CEA and CNRS-IN2P3 (France), BMBF and DFG
(Germany), INFN (Italy), FOM (Netherlands), NFR (Norway), MIST (Russia),
MEC (Spain), and PPARC (United Kingdom). Individuals have received
support from the Marie Curie EIF (European Union) and the A. P. Sloan
Foundation.
NR 14
TC 18
Z9 18
U1 0
U2 16
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD SEP 3
PY 2013
VL 111
IS 10
AR UNSP 101802
DI 10.1103/PhysRevLett.111.101802
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 211HW
UT WOS:000323898300010
PM 25166652
ER
PT J
AU Sakai, S
Blanc, S
Civelli, M
Gallais, Y
Cazayous, M
Measson, MA
Wen, JS
Xu, ZJ
Gu, GD
Sangiovanni, G
Motome, Y
Held, K
Sacuto, A
Georges, A
Imada, M
AF Sakai, S.
Blanc, S.
Civelli, M.
Gallais, Y.
Cazayous, M.
Measson, M. -A.
Wen, J. S.
Xu, Z. J.
Gu, G. D.
Sangiovanni, G.
Motome, Y.
Held, K.
Sacuto, A.
Georges, A.
Imada, M.
TI Raman-Scattering Measurements and Theory of the Energy-Momentum Spectrum
for Underdoped Bi2Sr2CaCuO8+delta Superconductors: Evidence of an s-Wave
Structure for the Pseudogap
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HIGH-T-C; CUPRATE SUPERCONDUCTORS; FERMI-SURFACE; STATE; PHASE; GAP;
BI2SR2CACU2O8+DELTA; SYMMETRY; LIQUID
AB We reveal the full energy-momentum structure of the pseudogap of underdoped high-T-c cuprate superconductors. Our combined theoretical and experimental analysis explains the spectral-weight suppression observed in the B-2g Raman response at finite energies in terms of a pseudogap appearing in the single-electron excitation spectra above the Fermi level in the nodal direction of momentum space. This result suggests an s-wave pseudogap (which never closes in the energy-momentum space), distinct from the d-wave superconducting gap. Recent tunneling and photoemission experiments on underdoped cuprates also find a natural explanation within the s-wave pseudogap scenario.
C1 [Sakai, S.; Georges, A.] Ecole Polytech, Ctr Phys Theor, CNRS, F-91128 Palaiseau, France.
[Sakai, S.; Motome, Y.; Imada, M.] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan.
[Sakai, S.; Georges, A.; Imada, M.] JST CREST, Bunkyo Ku, Tokyo 1138656, Japan.
[Blanc, S.; Gallais, Y.; Cazayous, M.; Measson, M. -A.; Sacuto, A.] Univ Paris 07, Lab Mat & Phenomnes Quant, UMR CNRS 7162, F-75205 Paris 13, France.
[Civelli, M.] Univ Paris 11, Phys Solides Lab, CNRS, UMR 8502, F-91405 Orsay, France.
[Wen, J. S.; Xu, Z. J.; Gu, G. D.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Sangiovanni, G.] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany.
[Sangiovanni, G.; Held, K.] Vienna Univ Technol, Inst Solid State Phys, A-1040 Vienna, Austria.
[Georges, A.] Coll France, F-75005 Paris, France.
[Georges, A.] Univ Geneva, DPMC, CH-1211 Geneva, Switzerland.
RP Sakai, S (reprint author), Ecole Polytech, Ctr Phys Theor, CNRS, F-91128 Palaiseau, France.
RI Wen, Jinsheng/F-4209-2010; Georges, Antoine/H-4855-2012; Sangiovanni,
Giorgio/L-5893-2013; Gallais, Yann/E-5240-2011; xu, zhijun/A-3264-2013;
Measson, Marie-aude/E-6388-2015; Held, Karsten/O-4178-2015; Sacuto,
Alain/L-2620-2016
OI Wen, Jinsheng/0000-0001-5864-1466; Georges, Antoine/0000-0001-9479-9682;
Sangiovanni, Giorgio/0000-0003-2218-2901; Gallais,
Yann/0000-0002-0589-1522; xu, zhijun/0000-0001-7486-2015; Measson,
Marie-aude/0000-0002-6495-7376; Held, Karsten/0000-0001-5984-8549;
Sacuto, Alain/0000-0002-8351-6154
FU MEXT, Japan [22340090]; Strategic Programs for Innovative Research
(SPIRE), MEXT; Computational Materials Science Initiative (CMSI), Japan;
Austrian Science Fund (FWF) through SFB ViCoM [F4103-N13]; FWF [M1136];
l'Agence Nationale de la Recherche [BLAN07-1-183876]; DOE
[DE-AC02-98CH10886]
FX We acknowledge valuable comments by A. Tremblay. M. Ci. acknowledges
discussions with V. Brouet, A. Cano, B. G. Kotliar, I. Paul, and A.
Santander-Syro. The work was supported by a Grant-in-Aid for Scientific
Research (Grant No. 22340090) from MEXT, Japan. A part of the research
has been funded by the Strategic Programs for Innovative Research
(SPIRE), MEXT, and the Computational Materials Science Initiative
(CMSI), Japan. K. H. is supported by the Austrian Science Fund (FWF)
through SFB ViCoM F4103-N13, and G. S. by the FWF under "Lise-Meitner''
Grant No. M1136. S. B., Y. G., M. Ca., M.-A. M., and A. S. acknowledge
support from l'Agence Nationale de la Recherche through Grant No.
BLAN07-1-183876, "GAPSUPRA." The work in BNL is supported by the DOE
under Contract No. DE-AC02-98CH10886. The calculations were performed at
the Vienna Scientific Cluster and at the Supercomputer Center, ISSP,
University of Tokyo.
NR 52
TC 34
Z9 34
U1 3
U2 43
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD SEP 3
PY 2013
VL 111
IS 10
AR 107001
DI 10.1103/PhysRevLett.111.107001
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 211HW
UT WOS:000323898300017
PM 25166695
ER
PT J
AU Takamura, Y
Folven, E
Shu, JBR
Lukes, KR
Li, BZ
Scholl, A
Young, AT
Retterer, ST
Tybell, T
Grepstad, JK
AF Takamura, Yayoi
Folven, Erik
Shu, Jonathan B. R.
Lukes, Karl R.
Li, Binzhi
Scholl, Andreas
Young, Anthony T.
Retterer, Scott T.
Tybell, Thomas
Grepstad, Jostein K.
TI Spin-Flop Coupling and Exchange Bias in Embedded Complex Oxide
Micromagnets
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID THIN-FILMS; LENGTH SCALES; NANOSTRUCTURES; STATES
AB The magnetic domains of embedded micromagnets with 2 mu m X 2 mu m dimensions defined in epitaxial La0.7Sr0.3MnO3 (LSMO) thin films and LaFeO3/LSMO bilayers were investigated using soft x-ray magnetic microscopy. Square micromagnets aligned with their edges parallel to the easy axes of LSMO provide an ideal experimental geometry for probing the influence of interface exchange coupling on the magnetic domain patterns. The observation of unique domain patterns not reported for ferromagnetic metal microstructures, namely divergent antiferromagnetic vortex domains and "Z"-type domains, suggests the simultaneous presence of spin-flop coupling and local exchange bias in this system.
C1 [Takamura, Yayoi; Shu, Jonathan B. R.; Lukes, Karl R.; Li, Binzhi] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
[Folven, Erik; Tybell, Thomas; Grepstad, Jostein K.] Norwegian Univ Sci & Technol, Dept Elect & Telecommun, NO-7491 Trondheim, Norway.
[Scholl, Andreas; Young, Anthony T.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Retterer, Scott T.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Takamura, Y (reprint author), Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA.
EM ytakamura@ucdavis.edu
RI Tybell, Thomas/B-8297-2013; Folven, Erik/D-5218-2013; Retterer,
Scott/A-5256-2011; Scholl, Andreas/K-4876-2012
OI Tybell, Thomas/0000-0003-0787-8476; Folven, Erik/0000-0003-4036-0505;
Retterer, Scott/0000-0001-8534-1979;
FU Oak Ridge National Laboratory; Office of Basic Energy Sciences, U.S.
Department of Energy (DOE); Office of Science, Office of Basic Energy
Sciences, of the U.S. DOE [DE-AC02-05CH11231]; Research Council of
Norway [190086/S10]; National Science Foundation [DMR 0747896]
FX Part of this work was carried out at the Center for Nanophase Materials
Sciences, which is sponsored at Oak Ridge National Laboratory by the
Office of Basic Energy Sciences, U.S. Department of Energy (DOE). The
Advanced Light Source is supported by the Director, Office of Science,
Office of Basic Energy Sciences, of the U. S. DOE under Contract No.
DE-AC02-05CH11231. Funding for these experiments was obtained from the
Research Council of Norway under Contract No. 190086/S10 and the
National Science Foundation (DMR 0747896).
NR 37
TC 8
Z9 8
U1 4
U2 97
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD SEP 3
PY 2013
VL 111
IS 10
AR 107201
DI 10.1103/PhysRevLett.111.107201
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 211HW
UT WOS:000323898300018
PM 25166703
ER
PT J
AU Payne, CM
Resch, MG
Chen, LQ
Crowley, MF
Himmel, ME
Taylor, LE
Sandgren, M
Stahlberg, J
Stals, I
Tan, ZP
Beckham, GT
AF Payne, Christina M.
Resch, Michael G.
Chen, Liqun
Crowley, Michael F.
Himmel, Michael E.
Taylor, Larry E., II
Sandgren, Mats
Stahlberg, Jerry
Stals, Ingeborg
Tan, Zhongping
Beckham, Gregg T.
TI Glycosylated linkers in multimodular lignocellulose-degrading enzymes
dynamically bind to cellulose
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE biofuels; cellulase; post-translational modification; carbohydrate
recognition
ID REESEI CELLOBIOHYDROLASE-I; TRICHODERMA-REESEI; CRYSTALLINE CELLULOSE;
BIOMASS RECALCITRANCE; SERRATIA-MARCESCENS; MOLECULAR-DYNAMICS;
DISORDERED PROTEIN; X-RAY; DEGRADATION; MODULES
AB Plant cell-wall polysaccharides represent a vast source of food in nature. To depolymerize polysaccharides to soluble sugars, many organisms use multifunctional enzyme mixtures consisting of glycoside hydrolases, lytic polysaccharide mono-oxygenases, polysaccharide lyases, and carbohydrate esterases, as well as accessory, redox-active enzymes for lignin depolymerization. Many of these enzymes that degrade lignocellulose are multimodular with carbohydrate-binding modules (CBMs) and catalytic domains connected by flexible, glycosylated linkers. These linkers have long been thought to simply serve as a tether between structured domains or to act in an inchworm-like fashion during catalytic action. To examine linker function, we performed molecular dynamics (MD) simulations of the Trichoderma reesei Family 6 and Family 7 cellobiohydrolases (TrCel6A and TrCel7A, respectively) bound to cellulose. During these simulations, the glycosylated linkers bind directly to cellulose, suggesting a previously unknown role in enzyme action. The prediction from the MD simulations was examined experimentally by measuring the binding affinity of the Cel7A CBM and the natively glycosylated Cel7A CBM-linker. On crystalline cellulose, the glycosylated linker enhances the binding affinity over the CBM alone by an order of magnitude. The MD simulations before and after binding of the linker also suggest that the bound linker may affect enzyme action due to significant damping in the enzyme fluctuations. Together, these results suggest that glycosylated linkers in carbohydrate-active enzymes, which are intrinsically disordered proteins in solution, aid in dynamic binding during the enzymatic deconstruction of plant cell walls.
C1 [Payne, Christina M.; Resch, Michael G.; Crowley, Michael F.; Himmel, Michael E.; Taylor, Larry E., II] Natl Renewable Energy Lab, Biosci Ctr, Golden, CO 80401 USA.
[Beckham, Gregg T.] Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO 80401 USA.
[Payne, Christina M.] Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA.
[Chen, Liqun; Tan, Zhongping] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80303 USA.
[Chen, Liqun; Tan, Zhongping] Univ Colorado, BioFrontiers Inst, Boulder, CO 80303 USA.
[Sandgren, Mats; Stahlberg, Jerry] Swedish Univ Agr Sci, Dept Mol Biol, SE-75007 Uppsala, Sweden.
[Stals, Ingeborg] Univ Coll Ghent, Fac Appl Biosci Engn, B-9000 Ghent, Belgium.
[Stals, Ingeborg] Univ Ghent, Dept Biochem & Mol Biol, B-9000 Ghent, Belgium.
[Beckham, Gregg T.] Colorado Sch Mines, Dept Chem Engn, Golden, CO 80401 USA.
RP Stals, I (reprint author), Univ Coll Ghent, Fac Appl Biosci Engn, B-9000 Ghent, Belgium.
EM ingeborg.stals@hogent.be; zhongping.tan@colorado.edu;
gregg.beckham@nrel.gov
RI crowley, michael/A-4852-2013; Stahlberg, Jerry/D-4163-2013; Payne,
Christina/C-7338-2011
OI crowley, michael/0000-0001-5163-9398; Stahlberg,
Jerry/0000-0003-4059-8580; Payne, Christina/0000-0001-5264-0964
FU BioEnergy Technologies Office; University of Colorado Boulder;
University College Ghent; National Science Foundation through Extreme
Science and Engineering Discovery Environment resources on the National
Institute for Computational Science Kraken and Athena clusters
[TG-MCB090159]; National Renewable Energy Laboratory Computational
Sciences Center; US Department of Energy (DOE) Energy Efficiency and
Renewable Energy [DE-AC36-08GO28308]; ORNL Center for Structural
Molecular Biology [ERKP291]; US DOE Office of Science, Office of
Biological and Environmental Research
FX We thank the Proteomics and Metabolomics Facility at Colorado State
University for analyzing the glycosylated CBM-linker, colleagues at
DuPont Industrial Biosciences for helpful discussions, Steve Decker for
a critical reading of the manuscript, and L. Zhong and J. F. Matthews
for providing a preliminary model of TrCel7A. C. M. P., M. G. R., M. E.
H., L. E. T., M. F. C., and G. T. B. thank the BioEnergy Technologies
Office for funding this work. L. C. and Z.T. thank the University of
Colorado Boulder for funding. I. S. acknowledges the Research Fund of
the University College Ghent. M. S. and J. S. acknowledge the Faculty
for Natural Resources and Agriculture at the Swedish University of
Agricultural Sciences through the research program MicroDrivE.
Computational time for this research was supported in part by the
National Science Foundation through Extreme Science and Engineering
Discovery Environment resources on the National Institute for
Computational Science Kraken and Athena clusters, under Grant
TG-MCB090159 and by the National Renewable Energy Laboratory
Computational Sciences Center supported by US Department of Energy (DOE)
Energy Efficiency and Renewable Energy under Contract DE-AC36-08GO28308.
The Biofuels Science Focus Area (FWP ERKP752) at Oak Ridge National
Laboratory (ORNL) and the ORNL Center for Structural Molecular Biology
(Project ERKP291), funded by the US DOE Office of Science, Office of
Biological and Environmental Research are acknowledged for preparing the
bacterial cellulose used in this study.
NR 56
TC 55
Z9 55
U1 6
U2 120
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD SEP 3
PY 2013
VL 110
IS 36
BP 14646
EP 14651
DI 10.1073/pnas.1309106110
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 211DY
UT WOS:000323886200042
PM 23959893
ER
PT J
AU Zhang, KW
Halitschke, R
Yin, CX
Liu, CJ
Gan, SS
AF Zhang, Kewei
Halitschke, Rayko
Yin, Changxi
Liu, Chang-Jun
Gan, Su-Sheng
TI Salicylic acid 3-hydroxylase regulates Arabidopsis leaf longevity by
mediating salicylic acid catabolism
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE aging; benzoic acid; disease resistance; NahG; senescence-associated
gene
ID ACQUIRED-RESISTANCE; GENE-EXPRESSION; SENESCENCE; TOBACCO; BIOSYNTHESIS;
THALIANA; TRANSCRIPTOME; HYDROXYLASE; PATHOGENS; OXYGENASE
AB The plant hormone salicylic acid (SA) plays critical roles in plant defense, stress responses, and senescence. Although SA biosynthesis is well understood, the pathways by which SA is catabolized remain elusive. Here we report the identification and characterization of an SA 3-hydroxylase (S3H) involved in SA catabolism during leaf senescence. S3H is associated with senescence and is inducible by SA and is thus a key part of a negative feedback regulation system of SA levels during senescence. The enzyme converts SA (with a Km of 58.29 mu M) to both 2,3-dihydroxybenzoic acid (2,3-DHBA) and 2,5-DHBA in vitro but only 2,3-DHBA in vivo. The s3h knockout mutants fail to produce 2,3-DHBA sugar conjugates, accumulate very high levels of SA and its sugar conjugates, and exhibit a precocious senescence phenotype. Conversely, the gain-of-function lines contain high levels of 2,3-DHBA sugar conjugates and extremely low levels of SA and its sugar conjugates and display a significantly extended leaf longevity. This research reveals an elegant SA catabolic mechanism by which plants regulate SA levels by converting it to 2,3-DHBA to prevent SA over-accumulation. The research also provides strong molecular genetic evidence for an important role of SA in regulating the onset and rate of leaf senescence.
C1 [Zhang, Kewei; Yin, Changxi; Gan, Su-Sheng] Cornell Univ, Dept Hort, Ithaca, NY 14853 USA.
[Halitschke, Rayko] Cornell Univ, Dept Ecol & Evolutionary Biol, Ithaca, NY 14853 USA.
[Gan, Su-Sheng] Cornell Univ, Dept Plant Breeding & Genet, Ithaca, NY 14853 USA.
[Zhang, Kewei; Liu, Chang-Jun] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Gan, SS (reprint author), Cornell Univ, Dept Hort, Ithaca, NY 14853 USA.
EM SG288@cornell.edu
FU Department of Energy (DOE) [DE-FG02-02ER15341]; National Science
Foundation (NSF) [MCB-0445596]; DOE [DEAC0298CH10886 (BO-147)]; NSF
[MCB-1051675]
FX We thank Dr. Richard Amasino (University of Wisconsin-Madison) and
William Gan (Cornell University) for critical readings of the manuscript
and Dr. Daniel Klessig (Boyce Thompson Institute) for useful discussion.
Arabidopsis Biological Resource Center (Columbus, Ohio) is thanked for
sending us the T-DNA insertion mutant seed and the BAC F7L13 DNA. This
research was supported by Department of Energy (DOE) Grant
DE-FG02-02ER15341 and National Science Foundation (NSF) Grant
MCB-0445596 (to S.-S.G.) and DOE Grant DEAC0298CH10886 (BO-147) and NSF
Grant MCB-1051675 (to C.-J.L.).
NR 35
TC 39
Z9 43
U1 1
U2 65
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD SEP 3
PY 2013
VL 110
IS 36
BP 14807
EP 14812
DI 10.1073/pnas.1302702110
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 211DY
UT WOS:000323886200069
PM 23959884
ER
PT J
AU Perelson, AS
Ribeiro, RM
AF Perelson, Alan S.
Ribeiro, Ruy M.
TI Modeling the within-host dynamics of HIV infection
SO BMC BIOLOGY
LA English
DT Review
ID IMMUNODEFICIENCY-VIRUS-INFECTION; ACTIVE ANTIRETROVIRAL THERAPY; CD8(+)
T-CELLS; FOLLICULAR DENDRITIC CELLS; IN-VIVO; VIRAL DYNAMICS;
DRUG-RESISTANCE; REVERSE-TRANSCRIPTASE; TYPE-1 INFECTION; COMBINATION
THERAPY
AB The new field of viral dynamics, based on within-host modeling of viral infections, began with models of human immunodeficiency virus (HIV), but now includes many viral infections. Here we review developments in HIV modeling, emphasizing quantitative findings about HIV biology uncovered by studying acute infection, the response to drug therapy and the rate of generation of HIV variants that escape immune responses. We show how modeling has revealed many dynamical features of HIV infection and how it may provide insight into the ultimate cure for this infection.
C1 [Perelson, Alan S.; Ribeiro, Ruy M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Perelson, AS (reprint author), Los Alamos Natl Lab, MS K710, Los Alamos, NM 87545 USA.
EM asp@lanl.gov
OI Ribeiro, Ruy/0000-0002-3988-8241
FU US Department of Energy [DE-AC52-06NA25396]; NIH [P20-GM103452,
OD011095, AI028433]; Center for HIV/AIDS Vaccine Immunology and
Immunogen Discovery [UM1-AI100645-01]; EU [PCOFUND-GA-2009-246542]; FCT
Portugal
FX Portions of this work were performed under the auspices of the US
Department of Energy under contract DE-AC52-06NA25396 and supported by
NIH grants P20-GM103452, OD011095, AI028433, and the Center for HIV/AIDS
Vaccine Immunology and Immunogen Discovery grant number UM1-AI100645-01.
RMR received partial funding from the EU 7th Framework Program under
grant no. PCOFUND-GA-2009-246542 and from FCT Portugal and part of his
work was done while visiting Instituto de Medicina Molecular, Faculdade
de Medicina da Universidade de Lisboa, Lisbon, Portugal.
NR 122
TC 50
Z9 50
U1 4
U2 45
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1741-7007
J9 BMC BIOL
JI BMC Biol.
PD SEP 3
PY 2013
VL 11
AR 96
DI 10.1186/1741-7007-11-96
PG 10
WC Biology
SC Life Sciences & Biomedicine - Other Topics
GA 210MC
UT WOS:000323836600001
PM 24020860
ER
PT J
AU Campanell, M
Wang, HY
AF Campanell, Michael
Wang, Hongyue
TI Influence of emitted electrons transiting between surfaces on
plasma-surface interaction
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID SECONDARY ELECTRONS; HALL THRUSTER; EMISSION; SHEATH; SPACE; SIMULATION;
DISCHARGE; COLLECTOR; CATHODE
AB Emitted electrons are accelerated back into the plasma by the sheath. If their mean free path is large, they can propagate directly to another surface without suffering collisions. We analyze the effects of "transit" on plasma-surface interaction. When transit occurs, surfaces exchanging electrons are intricately coupled. All surfaces float more negatively than they would if the emission collisionally remixed with the bulk plasma. Asymmetries of the system drive a net "transit current" between the surfaces, which influences their potential difference. The larger the initial energy spread of the emitted electrons, the larger the potential difference. (C) 2013 AIP Publishing LLC.
C1 [Campanell, Michael] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Wang, Hongyue] Beijing Univ Aeronaut & Astronaut, Beijing 100083, Peoples R China.
RP Campanell, M (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
FU U.S. Department of Energy [DE-AC02-09CH11466]
FX This work was supported by the U.S. Department of Energy under Contract
No. DE-AC02-09CH11466.
NR 25
TC 1
Z9 1
U1 2
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD SEP 2
PY 2013
VL 103
IS 10
AR 104104
DI 10.1063/1.4820352
PG 4
WC Physics, Applied
SC Physics
GA 217VG
UT WOS:000324389700071
ER
PT J
AU Cao, W
Singh, R
Zhang, CH
Han, JG
Tonouchi, M
Zhang, WL
AF Cao, Wei
Singh, Ranjan
Zhang, Caihong
Han, Jiaguang
Tonouchi, Masayoshi
Zhang, Weili
TI Plasmon-induced transparency in metamaterials: Active near field
coupling between bright superconducting and dark metallic mode
resonators
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ELECTROMAGNETICALLY-INDUCED TRANSPARENCY; TERAHERTZ METAMATERIALS; FANO
RESONANCES; CLASSICAL ANALOG
AB Structured plasmonic metamaterial devices offer the design flexibility to be size scaled for operation across the electromagnetic spectrum and are extremely attractive for generating electromagnetically induced transparency and slow-light behaviors via coupling of bright and dark subwavelength resonators. Here, we experimentally demonstrate a thermally active superconductor-metal coupled resonator based hybrid terahertz metamaterial on a sapphire substrate that shows tunable transparency and slow light behavior as the metamaterial chip is cooled below the high-temperature superconducting phase transition temperature. This hybrid metamaterial opens up the avenues for designing micro-sized active circuitry with switching, modulation, and "slowing down terahertz light" capabilities. (C) 2013 AIP Publishing LLC.
C1 [Cao, Wei; Zhang, Weili] Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA.
[Singh, Ranjan] Los Alamos Natl Lab, AOT HPE, Los Alamos, NM 87545 USA.
[Zhang, Caihong; Tonouchi, Masayoshi] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan.
[Han, Jiaguang; Zhang, Weili] Tianjin Univ, Ctr Terahertz Waves, Tianjin 300072, Peoples R China.
[Han, Jiaguang; Zhang, Weili] Tianjin Univ, Coll Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China.
[Han, Jiaguang; Zhang, Weili] Minist Educ, Key Lab Optoelect Informat & Technol, Tianjin 300072, Peoples R China.
RP Singh, R (reprint author), Los Alamos Natl Lab, AOT HPE, POB 1663, Los Alamos, NM 87545 USA.
EM ranjan.ranjansingh@gmail.com; jiaghan@tju.edu.cn;
weili.zhang@okstate.edu
RI Singh, Ranjan/B-4091-2010; Zhang, Weili/C-5416-2011; Tonouchi,
Masayoshi/I-2402-2015
OI Singh, Ranjan/0000-0001-8068-7428; Zhang, Weili/0000-0002-8591-0200;
Tonouchi, Masayoshi/0000-0002-9284-3501
FU U.S. National Science Foundation [ECCS-1232081]; National Science
Foundation of China [61138001, 61028011, 61007034]
FX This work was supported by the U.S. National Science Foundation (Grand
No. ECCS-1232081) and the National Science Foundation of China (Grant
Nos. 61138001, 61028011, and 61007034).
NR 51
TC 55
Z9 55
U1 9
U2 105
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD SEP 2
PY 2013
VL 103
IS 10
AR 101106
DI 10.1063/1.4819389
PG 5
WC Physics, Applied
SC Physics
GA 217VG
UT WOS:000324389700006
ER
PT J
AU Das, S
Appenzeller, J
AF Das, Saptarshi
Appenzeller, Joerg
TI WSe2 field effect transistors with enhanced ambipolar characteristics
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID THIN-FILM TRANSISTORS; MOS2 TRANSISTORS; MULTILAYER MOS2; NANOTUBE
TRANSISTORS; ELECTRONIC-STRUCTURE; PERFORMANCE; CONTACTS; INTERFACES;
SURFACES; STATES
AB One of the most relevant features that a semiconducting channel material can offer when used in a field-effect transistor (FET) layout is its capability to enable both electron transport in the conduction band and hole transport in the valence band. In this way, complementary metal-oxide-semiconductor type applications become feasible once similar electron and hole drive current densities are achieved, and the threshold voltages are properly adjusted. In this article, we demonstrate pronounced ambipolar device characteristics of multilayer WSe2 FETs using different contact electrodes. Our study reveals that nickel electrodes facilitate electron injection while palladium electrodes are more efficient for hole injection. We also show, as an interesting demonstration, that by using nickel as the source contact electrode and palladium as the drain contact electrode, ambipolar device characteristics with similar on-state performance for both the electron and the hole branch can be achieved in WSe2 FETs. Finally, we discuss a unique technique based on the asymmetry in the ambipolar device characteristics to extract the Schottky barrier heights for such metal to WSe2 contacts. (C) 2013 AIP Publishing LLC.
C1 [Das, Saptarshi; Appenzeller, Joerg] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA.
[Das, Saptarshi; Appenzeller, Joerg] Purdue Univ, Dept ECE, W Lafayette, IN 47907 USA.
[Das, Saptarshi] Argonne Natl Lab, Ctr Nanoscale Mat, Lemont, IL 60439 USA.
RP Das, S (reprint author), Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA.
FU STARnet, a Semiconductor Research Corporation program; MARCO; DARPA
FX This work was in part supported by STARnet, a Semiconductor Research
Corporation program sponsored by MARCO and DARPA.
NR 30
TC 83
Z9 84
U1 21
U2 127
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD SEP 2
PY 2013
VL 103
IS 10
AR 103501
DI 10.1063/1.4820408
PG 5
WC Physics, Applied
SC Physics
GA 217VG
UT WOS:000324389700055
ER
PT J
AU Hayton, DJ
Khudchenko, A
Pavelyev, DG
Hovenier, JN
Baryshev, A
Gao, JR
Kao, TY
Hu, Q
Reno, JL
Vaks, V
AF Hayton, D. J.
Khudchenko, A.
Pavelyev, D. G.
Hovenier, J. N.
Baryshev, A.
Gao, J. R.
Kao, T. Y.
Hu, Q.
Reno, J. L.
Vaks, V.
TI Phase locking of a 3.4 THz third-order distributed feedback quantum
cascade laser using a room-temperature superlattice harmonic mixer (vol
103, 051115, 2013)
SO APPLIED PHYSICS LETTERS
LA English
DT Correction
C1 [Hayton, D. J.; Khudchenko, A.; Baryshev, A.; Gao, J. R.] Univ Groningen, SRON Netherlands Inst Space Res, NL-9474 AD Groningen, Netherlands.
[Pavelyev, D. G.] Lobachevskii State Univ Nizhny Novgorod, Nizhnii Novgorod 603950, Russia.
[Hovenier, J. N.; Gao, J. R.] Delft Univ Technol, Kavli Inst Nanosci, NL-2628 CJ Delft, Netherlands.
[Kao, T. Y.; Hu, Q.] MIT, Dept Elect Engn & Comp Sci, Elect Res Lab, Cambridge, MA 02139 USA.
[Reno, J. L.] Sandia Natl Labs, CINT, Albuquerque, NM 87185 USA.
[Vaks, V.] Russian Acad Sci, Inst Phys Microstruct, Nizhnii Novgorod 603950, Russia.
RP Hayton, DJ (reprint author), Univ Groningen, SRON Netherlands Inst Space Res, NL-9474 AD Groningen, Netherlands.
EM d.j.hayton@sron.nl; j.r.gao@tudelft.nl
RI Khudchenko, Andrey/K-3327-2015
OI Khudchenko, Andrey/0000-0002-8070-917X
NR 1
TC 0
Z9 0
U1 0
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD SEP 2
PY 2013
VL 103
IS 10
AR 109903
DI 10.1063/1.4819755
PG 1
WC Physics, Applied
SC Physics
GA 217VG
UT WOS:000324389700078
ER
PT J
AU Narangammana, LK
Liu, X
Nie, YF
Rueckert, FJ
Budnick, JI
Hines, WA
Gu, G
Wells, BO
AF Narangammana, L. K.
Liu, X.
Nie, Y. F.
Rueckert, F. J.
Budnick, J. I.
Hines, W. A.
Gu, G.
Wells, B. O.
TI Low temperature crystal structure and large lattice discontinuity at T-c
in superconducting FeTeOx films
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB We report a high resolution x-ray diffraction study of the crystal structure of superconducting FeTeOx films. The crystal symmetry of FeTeOx matches the parent FeTe, unlike most iron-based superconductors. However, at the superconducting transition there is a large change in the c-axis lattice parameter. Such a discontinuity in the thermal expansion is known in normal-to-superconducting phase transitions, but here the effect is far larger than for other iron-based superconductors. Following the typical analysis of such a discontinuity in thermal expansion using the Ehrenfest-relation leads to a prediction of a large enhancement of T-c in strained FeTeOx films. (C) 2013 AIP Publishing LLC.
C1 [Narangammana, L. K.; Nie, Y. F.; Rueckert, F. J.; Budnick, J. I.; Hines, W. A.; Wells, B. O.] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
[Liu, X.] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
[Liu, X.] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
[Liu, X.; Gu, G.] Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
RP Nie, YF (reprint author), Cornell Univ, Dept Phys, Lab Atom & Solid State Phys, Ithaca, NY 14853 USA.
RI Nie, Yuefeng/A-1595-2013; Nie, Yuefeng/L-8071-2013
OI Nie, Yuefeng/0000-0002-3449-5393; Nie, Yuefeng/0000-0002-3449-5393
FU U.S. DOE [DE-FG02-00ER45801]; office of Science, Office of Basic Energy
Sciences, U.S. Department of Energy [DE-AC02-98CH10886]
FX We thank J. Hill, H. E. Mohottala, and Z. H. Zhu for their helpful
discussions. This work was supported by the U.S. DOE under Contract No.
DE-FG02-00ER45801. Use of the National Synchrotron Light Source,
Brookhaven National Laboratory was supported by the office of Science,
Office of Basic Energy Sciences, U.S. Department of Energy under
Contract No. DE-AC02-98CH10886.
NR 30
TC 1
Z9 1
U1 3
U2 22
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD SEP 2
PY 2013
VL 103
IS 10
AR 102604
DI 10.1063/1.4820479
PG 4
WC Physics, Applied
SC Physics
GA 217VG
UT WOS:000324389700042
ER
PT J
AU Prestgard, MC
Siegel, G
Ma, Q
Tiwari, A
AF Prestgard, M. C.
Siegel, G.
Ma, Q.
Tiwari, A.
TI Magnetic characteristics of phase-separated CeO2:Co thin films
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID CO-DOPED CEO2; ROOM-TEMPERATURE; SPINTRONICS; SEMICONDUCTORS;
FERROMAGNETISM; BEHAVIOR; GAN
AB Herewith, we are reporting the magnetic properties of phase-separated Co-doped CeO2 films (with a Ce:Co atomic-ratio of 0.97:0.03) grown on single-crystal SrTiO3 (001) substrates. A comparison of the magnetic characteristics of these films with those of homogenously doped CeO2:Co films of the same composition illustrates the significant differences in their magnetic behavior. These behavioral characteristics provide a model for determining if the magnetic behavior observed in this, as well as in other diluted magnetic dielectric systems, is due to homogeneous doping, a mixture of doping and transition metal cluster formation, or exists purely as a result of transition metal clustering. (C) 2013 AIP Publishing LLC.
C1 [Prestgard, M. C.; Siegel, G.; Tiwari, A.] Univ Utah, Dept Mat Sci & Engn, Nanostruct Mat Res Lab, Salt Lake City, UT 84112 USA.
[Ma, Q.] Argonne Natl Lab, Adv Photon Source, Northwestern Synchrotron Res Ctr, DND CAT, Argonne, IL 60439 USA.
RP Tiwari, A (reprint author), Univ Utah, Dept Mat Sci & Engn, Nanostruct Mat Res Lab, Salt Lake City, UT 84112 USA.
EM tiwari@eng.utah.edu
FU NSF [1121252, DMR-0746486, CMMI-1234338]; E. I. DuPont de Nemours Co.;
Dow Chemical Company; State of Illinois; DOE's Office of Basic Energy
Sciences [DE-AC02-06CH11357]
FX Financial support from NSF through Award No. 1121252 (CEMRI), Award No.
DMR-0746486 (CAREER), and Award No. CMMI-1234338 is thankfully
acknowledged. Research at DND-CAT was supported by E. I. DuPont de
Nemours & Co., The Dow Chemical Company, and the State of Illinois. Use
of the APS facilities was supported by the DOE's Office of Basic Energy
Sciences, under the Contract No. DE-AC02-06CH11357.
NR 28
TC 4
Z9 4
U1 1
U2 20
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD SEP 2
PY 2013
VL 103
IS 10
AR 102409
DI 10.1063/1.4820145
PG 4
WC Physics, Applied
SC Physics
GA 217VG
UT WOS:000324389700036
ER
PT J
AU Tschauner, O
Kiefer, B
Tetard, F
Tait, K
Bourguille, J
Zerr, A
Dera, P
McDowell, A
Knight, J
Clark, S
AF Tschauner, Oliver
Kiefer, Boris
Tetard, Florent
Tait, Kimberly
Bourguille, Judith
Zerr, Andreas
Dera, Przemyslaw
McDowell, Alastair
Knight, Jason
Clark, Simon
TI Elastic moduli and hardness of highly incompressible platinum
perpnictide PtAs2
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID AUGMENTED-WAVE METHOD; HIGH-PRESSURE; ELECTRONIC-STRUCTURE;
PHASE-TRANSITIONS; STATE; PREDICTION; TOUGHNESS; CONTACTS; FRACTURE;
NITRIDE
AB PtAs2 appears to be the least compressible known arsenide with a bulk modulus of 220(5) GPa and a shear modulus of between 64 and 77 GPa. PtAs2 has a hardness of 11(1) GPa, which is remarkably high for an arsenide. These elastic and mechanical properties in combination with the known chemical inertness and the small indirect band gap add interest to the use and occurrence of PtAs2 at Pt-GaAs contacts in transistors. We note the modest fracture toughness of 1.1-1.6 MPa m(1/2) of PtAs2. (C) 2013 AIP Publishing LLC.
C1 [Tschauner, Oliver] Univ Nevada, Dept Geosci, High Pressure Sci & Engn Ctr, Las Vegas, NV 89154 USA.
[Kiefer, Boris] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA.
[Tetard, Florent; Bourguille, Judith; Zerr, Andreas] LSPM CNRS, F-93430 Villetaneuse, France.
[Tait, Kimberly] Univ Toronto, Dept Earth Sci, Toronto, ON M5S 3B1, Canada.
[Dera, Przemyslaw] Univ Chicago, Argonne Natl Lab, Argonne, IL 60439 USA.
[McDowell, Alastair; Knight, Jason; Clark, Simon] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Tschauner, O (reprint author), Univ Nevada, Dept Geosci, High Pressure Sci & Engn Ctr, Las Vegas, NV 89154 USA.
RI Tetard, Florent/B-9004-2014;
OI Tetard, Florent/0000-0001-6095-8892; Tetard,
Florent/0000-0003-3938-215X; Zerr, Andreas/0000-0002-4744-3074
FU NNSA through DOE [DE-NA0001982]; Office of Science, Office of Basic
Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
FX This research was supported by NNSA through DOE Cooperative Agreement
DE-NA0001982. The Advanced Light Source is supported by the Director,
Office of Science, Office of Basic Energy Sciences, of the U.S.
Department of Energy under Contract No. DE-AC02-05CH11231.
NR 41
TC 1
Z9 1
U1 5
U2 25
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD SEP 2
PY 2013
VL 103
IS 10
AR 101901
DI 10.1063/1.4819143
PG 5
WC Physics, Applied
SC Physics
GA 217VG
UT WOS:000324389700012
ER
PT J
AU Varley, JB
Lordi, V
AF Varley, J. B.
Lordi, V.
TI Electrical properties of point defects in CdS and ZnS
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID TOTAL-ENERGY CALCULATIONS; CHALCOPYRITE SOLAR-CELLS; II-VI COMPOUNDS;
WAVE BASIS-SET; BAND-GAP; EFFICIENCY; SEMICONDUCTORS
AB We investigate native point defects in CdS and ZnS, which are conventional n-type buffer layers used in thin-film solar cells. Using hybrid functional calculations, we characterize the electrical behavior of these defects and also consider common impurities such as O, H, and their complexes. We find cation vacancies are the dominant compensating acceptors and recombination centers, and their effects are more dramatic in ZnS than in CdS. We also determine the band alignment for conventional Cu(In,Ga)Se-2-based solar cells, giving insight into why CdS outperforms ZnS and why Zn oxysulfides are promising due to their improved conduction band offsets. (C) 2013 AIP Publishing LLC.
C1 [Varley, J. B.; Lordi, V.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Varley, JB (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
OI Lordi, Vincenzo/0000-0003-2415-4656
FU U.S. Department of Energy at Lawrence Livermore National Laboratory
[DE-AC52-07A27344]; Department of Energy office of Energy Efficiency &
Renewable Energy (EERE) through the SunShot Bridging Research
Interactions through collaborative Development Grants in Energy (BRIDGE)
program
FX This work was performed under the auspices of the U.S. Department of
Energy at Lawrence Livermore National Laboratory under Contract No.
DE-AC52-07A27344 and funded by the Department of Energy office of Energy
Efficiency & Renewable Energy (EERE) through the SunShot Bridging
Research Interactions through collaborative Development Grants in Energy
(BRIDGE) program.
NR 28
TC 15
Z9 15
U1 9
U2 48
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD SEP 2
PY 2013
VL 103
IS 10
AR 102103
DI 10.1063/1.4819492
PG 4
WC Physics, Applied
SC Physics
GA 217VG
UT WOS:000324389700025
ER
PT J
AU Barry, BM
Stein, BW
Larsen, CA
Wirtz, MN
Geiger, WE
Waterman, R
Kemp, RA
AF Barry, Brian M.
Stein, Benjamin W.
Larsen, Christopher A.
Wirtz, Melissa N.
Geiger, William E.
Waterman, Rory
Kemp, Richard A.
TI Metal Complexes (M = Zn, Sn, and Pb) of 2-Phosphinobenzenethiolates:
Insights into Ligand Folding and Hemilability
SO INORGANIC CHEMISTRY
LA English
DT Article
ID CHELATED DITHIOLATE LIGANDS; WEAKLY COORDINATING ANIONS;
ELECTRONIC-STRUCTURE; CRYSTAL-STRUCTURE; PHOSPHINOTHIOL LIGANDS;
MOLECULAR-STRUCTURES; LANTHANIDE(III)/ACTINIDE(III) DIFFERENTIATION;
ARENEPHOSPHINOTHIOL LIGANDS; DONOR LIGANDS; CHEMISTRY
AB The divalent metal complexes M-II{(SC6H4-2-PR2)-kappa S-2,P}(2) (3-7, and 9-11) (M= Zn, Sn, or Pb; R = Pr-i, Bu-t, or. Ph); the Sn(W) complexes :Sn{(SC6H4-2-PR2)-kappa(2)-S,P}Ph2Cl (12 and 13) (R = Pr-i and Bu-t), and the ionic Sn(IV) complexes [Sn{(SC6H4-2-PR2)-kappa(2)-S,P}Ph-2[BPh4] (14 and 15) (R = Pr-i and Bu-t) have been prepared and characterized by multinuclear NMR spectroscopy and single. crystal X.-ray diffraction when suitable crystals were afforded The Sn(II) and Pb(II) complexes with R = Ph, Pr-i, or Bu-t (5, 6, 9, and 10) demonstrated ligand "folding" hinging on the P,S vector-a behavior driven by the repulsions of the metal/phosphorus and:metal/sulfur lone Pairs and increased M-S sigma bonding strength. This phenomenon Was examined by density functional theory (DFT) calculations for the compounds in both folded and unfolded states. The Sn(IV) compound 13 (R = Bu-t) crystallized with the phosphine in an axial position of the pseudotrigonal bipyramidal complex and also exhibited hemilability in the Sn P dative bond, while compound 12 (R = Pr-i), interestingly, crystallized with phosphine in an equatorial position and did not show hemilability. Finally, the crystal structure of 15 (R = Bu-t) revealed the presence of an uncommon, 4-coordinate, stable Sn(IV) cation.
C1 [Barry, Brian M.; Stein, Benjamin W.; Larsen, Christopher A.; Wirtz, Melissa N.; Kemp, Richard A.] Univ New Mexico, Dept Chem & Chem Biol, Albuquerque, NM 87131 USA.
[Geiger, William E.; Waterman, Rory] Univ Vermont, Dept Chem, Burlington, VT 05405 USA.
[Kemp, Richard A.] Sandia Natl Labs, Adv Mat Lab, Albuquerque, NM 87106 USA.
RP Kemp, RA (reprint author), Univ New Mexico, Dept Chem & Chem Biol, Albuquerque, NM 87131 USA.
EM rakemp@unm.edu
RI Waterman, Rory/A-4596-2008
OI Waterman, Rory/0000-0001-8761-8759
FU National Science Foundation [CHE09-11110, CHE12-13529]; Laboratory
Directed Research and Development (LDRD) program at Sandia National
Laboratories [LDRD 151300]; National Science Foundation CRIF:MU award
[CHE04-43580]; NSF [CHE08-40523, CHE09-46690]; United States Department
of Energy's National Nuclear Security Administration [AC04-94AL85000]
FX This work was financially supported by the National Science Foundation
(Grants CHE09-11110 and CHE12-13529) and in part by the Laboratory
Directed Research and Development (LDRD) program at Sandia National
Laboratories (LDRD 151300). The Bruker X-ray diffractometer was
purchased via a National Science Foundation CRIF:MU award to the
University of New Mexico (CHE04-43580), and the NMR spectrometers were
upgraded via grants from the NSF (CHE08-40523 and CHE09-46690). Sandia
National Laboratories is a multiprogram laboratory managed and operated
by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin
Corporation, for the United States Department of Energy's National
Nuclear Security Administration under Contract DE-AC04-94AL85000.
NR 80
TC 6
Z9 6
U1 5
U2 27
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
EI 1520-510X
J9 INORG CHEM
JI Inorg. Chem.
PD SEP 2
PY 2013
VL 52
IS 17
BP 9875
EP 9884
DI 10.1021/ic400990n
PG 10
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 240WS
UT WOS:000326129000022
PM 23937328
ER
PT J
AU Calta, NP
Kanatzidis, MG
AF Calta, Nicholas P.
Kanatzidis, Mercouri G.
TI Quaternary Aluminum Silicides Grown in Al Flux: RE5Mn4Al23,Six (RE = Ho,
Er, Yb) and Er44Mn55(AlSi)237
SO INORGANIC CHEMISTRY
LA English
DT Article
ID QUANTUM CRITICAL-POINT; INTERMETALLIC COMPOUNDS; HOMOLOGOUS SERIES;
EXPLORATORY SYNTHESIS; PHYSICAL-PROPERTIES; LIQUID ALUMINUM; MOLTEN
ALUMINUM; MAGNETIC ORDER; CRYSTAL; PHASE
AB Four novel intennetallic silicides, RE5Mn4Al23-xSix (x = 7.9(9),,RE Ho,Er, Yb) and Er44Mn55(AlSi237, have been prepared by reaction in aluminum flux. Three.RE5Mn4Al23,Six compounds crystallize in the tetragonal space group P4/nniirtr with the relatively rare.ddsMgsFe(4)Al(18-x)Si(x) structure type Refinement of single crystal X-ray diffraction data yielded unit : cell parameters of a = 11.3834(9)-114171(10) A and c = 4.0297(2)-4.0575(4) A with volumes ranging from 522.41(5) to. 528.90(8) A3. Structure refinements on single crystal diffraction data show that Er(44)Mri(55)(AlS0237 adopts a new cubic structure . type in the space group Pm3n with a very large unit cell edge of a =21.815(3) A. This new structure is best understood when viewed as two sets of nested polyhedra centered on a main group atom and a manganese atom. These polyhedral clusters describe the majority of the atomic positions in the structure and form a perovskite-type network. We also report the electrical. and magnetic properties of the title compounds. All compounds except the Ho analogue behave as normal paramagnetic metals. without any observed magnetic transitions above 5 K and exhibit antiferromagnetic correlations deduced from the value of their Curie constants. Ho5Mn4Al23_xSix exhibit's a ferromagnetic transition at 20 K and an additional metamagnetic transition at 10K, " suggesting independent ordering temperatures for two distinct magnetic sublattices.
C1 [Calta, Nicholas P.; Kanatzidis, Mercouri G.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
[Kanatzidis, Mercouri G.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Kanatzidis, MG (reprint author), Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA.
EM m-kanatzidis@northwestern.edu
FU U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences, Materials Sciences and Engineering Division
[DE-AC02-06CH11357]; Northwestern University's International Institute
for Nanotechnology; State of Illinois Department of Commerce and
Economic Opportunity (DCEO) Award [10-203031]
FX Research at Argonne is supported by the U.S. Department of Energy,
Office of Science, Office of Basic Energy Sciences, Materials Sciences
and Engineering Division (Argonne contract no. DE-AC02-06CH11357). We
gratefully acknowledge the assistance of Prof. Danna Freedman and her
research group, as well as support from Northwestern University's
International Institute for Nanotechnology and the State of Illinois
Department of Commerce and Economic Opportunity (DCEO) Award #10-203031,
which facilitated some of the magnetic measurements. We also thank Dr.
Lei Fang for some experimental help.
NR 44
TC 2
Z9 2
U1 0
U2 17
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
EI 1520-510X
J9 INORG CHEM
JI Inorg. Chem.
PD SEP 2
PY 2013
VL 52
IS 17
BP 9931
EP 9940
DI 10.1021/ic401659y
PG 10
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 240WS
UT WOS:000326129000028
PM 23931551
ER
PT J
AU Leu, BM
Zgierski, MZ
Bischoff, C
Li, M
Hu, MY
Zhao, JY
Martin, SW
Alp, EE
Scheidt, WR
AF Leu, Bogdan M.
Zgierski, Marek Z.
Bischoff, Christian
Li, Ming
Hu, Michael Y.
Zhao, Jiyong
Martin, Steve W.
Alp, Esen Ercan
Scheidt, W. Robert
TI Quantitative Vibrational Dynamics of the Metal Site in a Tin Porphyrin:
An IR, NRVS, and DFT Study
SO INORGANIC CHEMISTRY
LA English
DT Article
ID NUCLEAR RESONANT SCATTERING; SYNCHROTRON-RADIATION; INFRARED SPECTRA;
NICKEL OCTAETHYLPORPHYRIN; PROTOPORPHYRIN-IX; ISOTOPE SHIFTS;
RAMAN-SPECTRA; FORCE-FIELD; SPECTROSCOPY; COMPLEXES
AB We used a newer, synchrotron-based, spectro scopic technique.(nuclear resonance vibrational spectroscopy,. :NRVS) in combination with a more traditional one (infrared 'absorption, IR) to obtain a. complete, 'quantitative pictine. of the metal center vibrational dynamics in a:six-cdoichnated 'tin :porphyrin. From the NRVS Sn-119 site selectivity and the.'Sensitivity of the IR signal to Sn-112/Sn-119 isotope substitution, we identified the frequency of the antisynimetric stretching of the axial bonds (290 cm(-1)) and all the other vibrations involving Sn. Experimentally authenticated density functional theory (DFT) calculations aid the data interpretation by providing : detailed normal Mode descriptions for each observed vibration. These results may represent a starting point toward the characterization of the local vibrational dynamics of the metallic site in tin porphyrins and compounds with related structures.; The quantitative complementariness between IR, NRVS, and DFT is emphasized.
C1 [Leu, Bogdan M.; Hu, Michael Y.; Zhao, Jiyong; Alp, Esen Ercan] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Zgierski, Marek Z.] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada.
[Bischoff, Christian; Martin, Steve W.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
[Li, Ming; Scheidt, W. Robert] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA.
RP Leu, BM (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
EM leu@aps.anl.gov
FU NIH [GM38401]; U.S. DOE [DE-ACO2-06CH11357]
FX WRS acknowledges generous support from the NIH (GM38401). Use of the
Advanced Photon Source, an Office of Science User Facility operated for
the U.S. Department of Energy (DOE) Office of Science by Argonne
National Laboratory, was supported by the U.S. DOE under Contract No.
DE-ACO2-06CH11357.
NR 56
TC 4
Z9 4
U1 7
U2 29
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
EI 1520-510X
J9 INORG CHEM
JI Inorg. Chem.
PD SEP 2
PY 2013
VL 52
IS 17
BP 9948
EP 9953
DI 10.1021/ic401152b
PG 6
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 240WS
UT WOS:000326129000030
PM 23962374
ER
PT J
AU Wiedner, ES
Roberts, JAS
Dougherty, WG
Kassel, WS
DuBois, DL
Bullock, RM
AF Wiedner, Eric S.
Roberts, John A. S.
Dougherty, William G.
Kassel, W. Scott
DuBois, Daniel L.
Bullock, R. Morris
TI Synthesis and Electrochemical Studies of Cobalt(III) Monohydride
Complexes Containing Pendant Amines
SO INORGANIC CHEMISTRY
LA English
DT Article
ID ELECTROCATALYTIC HYDROGEN EVOLUTION; BOND-DISSOCIATION ENERGIES; HYDRIDE
DONOR ABILITIES; METAL-HYDRIDES; H-2 PRODUCTION; POLYHYDRIDE COMPLEXES;
COBALOXIME CATALYSTS; ELECTRODE-POTENTIALS; FUNCTIONAL MODELS; WATER
REDUCTION
AB Two new tetraphosphine ligandsirc-PPhz2NPh2 ' (1";5-dipheny1-3,7-bis((diphenylphosphino)alkyl)-1,5-diaza: 3,7-diphosphacyclooctane; alkyl = (CH2)(2), n = 2 (L-2);. (CH2)(3), n = 3 (L-3)), have been synthesized. Coordination of these ligands to cobalt affords the complexes [Coll(L2)'(CH3CN)](2)* and [Coll(L-3)(CH3CN)](2+), which are reduced by KC8 to afford [Col(L2)(CH3CN)Y and [Col(L3). :(CH3CN)r. Protonation. of the Co' complexes affords [HCOIII(L2)(CH3CN)]2+ and [HCo111.(13)(CH3CN)P+. The " cyclic voltarnmetry of [HCollI(L2)(CH3CN)]2+,. analyzed using digital simulation, is consistent with an ErCrE,. reduction mechanism involving reversible acetonitrile dissociation from [HColl(L2)(CH3CN)Y. and resulting in formation of HCol(L2). ReductiOti:.of FICel..also results in cleavage of the H CO bond, from HColl or HCol, leading to formation of the Co' complex [COI(L2)(CH3CN)]''. Under voltarnmetric conditions, the,redUced. cobalt hydride reacts with a protic solvent impurity to generate Hi in a monometallic process involving two electrons per.cobalt. In contrast, under bulk electrolysis conditions, H-2 formation requires only one reducing equivalent per [HCoul(L2)(CH3CN)r:, indicating a bimetallic route wherein two cobalt hydride complexes react to form 2 equiv of "3"::[Col(L2)(CH3CN)r and 1 equiv of H2. These results indicate that both HCo11 and HCol can be formed under electrocatalytic conditions and should be considered as potential catalytic intermediates.
C1 [Wiedner, Eric S.; Roberts, John A. S.; DuBois, Daniel L.; Bullock, R. Morris] Pacific NW Natl Lab, Div Phys Sci, Richland, WA 99352 USA.
[Dougherty, William G.; Kassel, W. Scott] Villanova Univ, Dept Chem, Villanova, PA 19085 USA.
RP Wiedner, ES (reprint author), Pacific NW Natl Lab, Div Phys Sci, POB 999,K2-57, Richland, WA 99352 USA.
EM eric.wiedner@pnnl.gov; morris.bullock@pnnl.gov
RI Bullock, R. Morris/L-6802-2016;
OI Bullock, R. Morris/0000-0001-6306-4851; Wiedner,
Eric/0000-0002-7202-9676
FU Center for Molecular Electrocatalysis; Energy Frontier Research Center;
U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences. Pacific Northwest National Laboratory
FX We thank the U.S. Department of Energy, Office of Basic Energy Sciences,
Division of Chemical Sciences, Geosciences and Biosciences, for support
of the initial parts of this study. Current work is supported by the
Center for Molecular Electrocatalysis, an Energy Frontier Research
Center funded by the U.S. Department of Energy, Office of Science,
Office of Basic Energy Sciences. Pacific Northwest National Laboratory
is operated by Battelle for the U.S. Department of Energy.
NR 81
TC 27
Z9 27
U1 2
U2 47
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
EI 1520-510X
J9 INORG CHEM
JI Inorg. Chem.
PD SEP 2
PY 2013
VL 52
IS 17
BP 9975
EP 9988
DI 10.1021/ic401232g
PG 14
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 240WS
UT WOS:000326129000033
PM 23945020
ER
PT J
AU Gulo, F
Samal, SL
Corbett, JD
AF Gulo, Fakhili
Samal, Saroj L.
Corbett, John D.
TI Substantial Cd-Cd Bonding in Ca6PtCd11: A Condensed Intermetallic Phase
Built of Pentagonal Cd, and Rectangular Cd4/2Pt Pyramids
SO INORGANIC CHEMISTRY
LA English
DT Article
ID CRYSTAL-STRUCTURE; GOLD SUBSTITUTION; AU; CA; NETWORKS; SYSTEMS; SR; BA;
CHEMISTRY; TUNNELS
AB The novel intennetallic Ca(6)PtCc(11) is orthorhombic, Pnma, Z = 4,.with a = 18.799(2) A, b = 5.986(1) angstrom, c = 15.585(3) angstrom. The heavily condensed network contains three types of Parallel cadmium chains: apically strongly interbon'ded Cd-7 pentagonal bipyramids, linear Cd arrays, and rectangular Cd4/2Pt pyramids. All of the atoms have 11-13 neighbors. Calculations by means of the linear muffin-tin orbitals method in the atomic spheres approximation indicate that some Cd Cd interactions correspond to notably high Hamilton populations (1.07 eV per average bond) whereas the Ca-Ca covalent interactions (integrated crystal orbital Hamiltonian population) are particularly small (0.17 eV/bond). (Pt-Cd single bond metallic diameters,, and unusually uniform (A = 0.14 A). The Cd atoms.make major contributions to the stability of the phase via substantial Ss and Sp bonding, which include back donation of Cd Ss, Sp and Pt 5d into Ca 3d states in the principal bonding modes for Ca Cd and Ca Pt. Bonding Ca Ca, Ca Cd, and Cd Cd states remain above EF, and some relative oxidation of Ca in this structure seems probable. Ca6PtCd11 joins a.small group of other phases in which Cd clustering and Cd Cd bonding are important.
C1 [Corbett, John D.] Iowa State Univ, Ames Lab, DOE, Ames, IA 50010 USA.
Iowa State Univ, Dept Chem, Ames, IA 50010 USA.
RP Corbett, JD (reprint author), Iowa State Univ, Ames Lab, DOE, Ames, IA 50010 USA.
EM jdc@ameslab.gov
RI Gulo, Fakhili/L-7215-2013
OI Gulo, Fakhili/0000-0003-4371-0208
FU Office of the Basic Energy Sciences, Materials Sciences Division, U.S.
Department of Energy (DOE); DOE by Iowa State University
[DE-ACO2-07CH11358]
FX F.G. acknowledges the support of the Fulbright Scholar Program. Qjsheng
Lin helped guide our searches for quasicrystalline analogues, and Gordie
Miller provided useful theoretical insights and suggestions. The
research was supported by the 4. Ames Laboratory is operated for DOE by
Iowa State University under contract No. DE-ACO2-07CH11358.
NR 47
TC 3
Z9 3
U1 0
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
EI 1520-510X
J9 INORG CHEM
JI Inorg. Chem.
PD SEP 2
PY 2013
VL 52
IS 17
BP 10112
EP 10118
DI 10.1021/ic401455c
PG 7
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 240WS
UT WOS:000326129000048
PM 23957660
ER
PT J
AU Sun, EI
Leyn, SA
Kazanov, MD
Saier, MH
Novichkov, PS
Rodionov, DA
AF Sun, Eric I.
Leyn, Semen A.
Kazanov, Marat D.
Saier, Milton H., Jr.
Novichkov, Pavel S.
Rodionov, Dmitry A.
TI Comparative genomics of metabolic capacities of regulons controlled by
cis-regulatory RNA motifs in bacteria
SO BMC GENOMICS
LA English
DT Article
DE RNA regulatory motif; Riboswitch; Regulon; Gene function; Comparative
genomics; Bacteria
ID CANDIDATE STRUCTURED RNAS; MICROBIAL COMMUNITIES; RIBOSWITCH REGULATION;
GENE-EXPRESSION; TRANSPORT GENES; PROKARYOTES; BIOSYNTHESIS;
IDENTIFICATION; MECHANISMS; RECONSTRUCTION
AB Background: In silico comparative genomics approaches have been efficiently used for functional prediction and reconstruction of metabolic and regulatory networks. Riboswitches are metabolite-sensing structures often found in bacterial mRNA leaders controlling gene expression on transcriptional or translational levels. An increasing number of riboswitches and other cis-regulatory RNAs have been recently classified into numerous RNA families in the Rfam database. High conservation of these RNA motifs provides a unique advantage for their genomic identification and comparative analysis.
Results: A comparative genomics approach implemented in the RegPredict tool was used for reconstruction and functional annotation of regulons controlled by RNAs from 43 Rfam families in diverse taxonomic groups of Bacteria. The inferred regulons include similar to 5200 cis-regulatory RNAs and more than 12000 target genes in 255 microbial genomes. All predicted RNA-regulated genes were classified into specific and overall functional categories. Analysis of taxonomic distribution of these categories allowed us to establish major functional preferences for each analyzed cis-regulatory RNA motif family. Overall, most RNA motif regulons showed predictable functional content in accordance with their experimentally established effector ligands. Our results suggest that some RNA motifs ( including thiamin pyrophosphate and cobalamin riboswitches that control the cofactor metabolism) are widespread and likely originated from the last common ancestor of all bacteria. However, many more analyzed RNA motifs are restricted to a narrow taxonomic group of bacteria and likely represent more recent evolutionary innovations.
Conclusions: The reconstructed regulatory networks for major known RNA motifs substantially expand the existing knowledge of transcriptional regulation in bacteria. The inferred regulons can be used for genetic experiments, functional annotations of genes, metabolic reconstruction and evolutionary analysis. The obtained genome-wide collection of reference RNA motif regulons is available in the RegPrecise database (http://regprecise.lbl.gov/).
C1 [Sun, Eric I.; Saier, Milton H., Jr.] Univ Calif San Diego, Div Biol Sci, Dept Mol Biol, La Jolla, CA 92093 USA.
[Leyn, Semen A.; Rodionov, Dmitry A.] Sanford Burnham Med Res Inst, La Jolla, CA 92037 USA.
[Leyn, Semen A.; Kazanov, Marat D.; Rodionov, Dmitry A.] Russian Acad Sci, AA Kharkevich Inst Informat Transmiss Problems, Moscow 127994, Russia.
[Novichkov, Pavel S.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94710 USA.
RP Rodionov, DA (reprint author), Sanford Burnham Med Res Inst, La Jolla, CA 92037 USA.
EM rodionov@burnham.org
RI Kazanov, Marat/D-6381-2013;
OI Kazanov, Marat/0000-0002-2314-5507; Rodionov, Dmitry/0000-0002-0939-390X
FU Genomic Science Program (GSP), Office of Biological and Environmental
Research (OBER), U.S. Department of Energy (DOE) [DE-SC0004999];
Sanford-Burnham Medical Research Institute (SBMRI); ENIGMA Science Focus
Area (SFA) at LBNL [DE-AC02-05CH11231]; GSP Foundational Science Focus
Area (FSFA) of the Pacific Northwest National Laboratory (PNNL);
National Institute of General Medical Sciences [R01GM077402]; Ministry
of Education and Science of Russian Federation [8135, 8049]; Russian
Foundation for Basic Research [12-04-33003, 12-04-32098]; Lawrence
Berkeley National Laboratory (LBNL)
FX This research was supported by the Genomic Science Program (GSP), Office
of Biological and Environmental Research (OBER), U.S. Department of
Energy (DOE) under contract DE-SC0004999 with Sanford-Burnham Medical
Research Institute (SBMRI) and Lawrence Berkeley National Laboratory
(LBNL), the ENIGMA Science Focus Area (SFA) at LBNL (contract
DE-AC02-05CH11231), and by the GSP Foundational Science Focus Area
(FSFA) of the Pacific Northwest National Laboratory (PNNL). EIS and MHS
were supported by the National Institute of General Medical Sciences
(R01GM077402). MDK was supported by the Ministry of Education and
Science of Russian Federation, projects #8135 and #8049. Additional
funding was provided by the Russian Foundation for Basic Research
(grants 12-04-33003 and 12-04-32098).
NR 47
TC 16
Z9 16
U1 3
U2 24
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1471-2164
J9 BMC GENOMICS
JI BMC Genomics
PD SEP 2
PY 2013
VL 14
AR 597
DI 10.1186/1471-2164-14-597
PG 18
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA 211UN
UT WOS:000323936900001
PM 24060102
ER
PT J
AU Kawano, T
Talou, P
Stetcu, I
Chadwick, MB
AF Kawano, T.
Talou, P.
Stetcu, I.
Chadwick, M. B.
TI Statistical and evaporation models for the neutron emission energy
spectrum in the center-of-mass system from fission fragments
SO NUCLEAR PHYSICS A
LA English
DT Article
DE Prompt fission neutron spectrum; Hauser-Feshbach model; U-235; CGM code
ID MONTE-CARLO-SIMULATION; NUCLEAR-REACTIONS; CROSS-SECTIONS; MULTIMODAL
ANALYSIS; PARAMETER; FORMULA; CF-252
AB The neutron emission energy spectra in the CMS (center-of-mass) frame from two compound nuclei produced by fission are studied. The neutron spectra calculated with the Hauser-Feshbach statistical model are compared with the evaporation theory, and the definition of the temperature is revisited. Using the Monte Carlo technique we average the CMS neutron spectra from many fission fragments to construct the representative CMS spectrum from both the light and heavy fragments. The CMS spectra for each fission fragment pair are also converted into the laboratory frame to calculate the total prompt fission neutron spectrum that can be observed experimentally. This is compared to measured laboratory data for thermal neutron induced fission on U-235. We show that the Hauser-Feshbach calculation gives a different spectrum shape than the Madland-Nix model calculation. (c) 2013 Elsevier B.V. All rights reserved.
C1 [Kawano, T.; Talou, P.; Stetcu, I.; Chadwick, M. B.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Kawano, T (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM kawano@lanl.gov
FU National Nuclear Security Administration of the U.S. Department of
Energy at Los Alamos National Laboratory [DE-AC52-06NA25396]
FX We are grateful to T. Ohsawa, M. Jandel, J. Randrup, and R. Vogt for
useful discussions. This work was carried out under the auspices of the
National Nuclear Security Administration of the U.S. Department of
Energy at Los Alamos National Laboratory under Contract No.
DE-AC52-06NA25396.
NR 49
TC 3
Z9 3
U1 0
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD SEP 2
PY 2013
VL 913
BP 51
EP 70
DI 10.1016/j.nuclphysa.2013.05.020
PG 20
WC Physics, Nuclear
SC Physics
GA 197KA
UT WOS:000322848900003
ER
PT J
AU Uhrenholt, H
Aberg, S
Dobrowolski, A
Dossing, T
Ichikawa, T
Moller, P
AF Uhrenholt, H.
Aberg, S.
Dobrowolski, A.
Dossing, Th
Ichikawa, T.
Moeller, P.
TI Combinatorial nuclear level-density model
SO NUCLEAR PHYSICS A
LA English
DT Article
DE Level-density; Folded-Yukawa; Micro-canonical
ID ASTROPHYSICAL REACTION-RATES; DEFORMED-NUCLEI; PARITY DEPENDENCE;
STATISTICAL-MODEL; STRENGTH FUNCTION; DEFORMATION; PARTICLE; SPECTRA;
CHAOS
AB A microscopic nuclear level-density model is presented. The model is a completely combinatorial (micro-canonical) model based on the folded-Yukawa single-particle potential and includes explicit treatment of pairing, rotational and vibrational states. The microscopic character of all states enables extraction of level-distribution functions with respect to pairing gaps, parity and angular momentum. The results of the model are compared to available experimental data: level spacings at neutron separation energy, data on total level-density functions from the Oslo method, cumulative level densities from low-lying discrete states, and data on parity ratios. Spherical and deformed nuclei follow basically different coupling schemes, and we focus on deformed nuclei. (c) 2013 Elsevier B.V. All rights reserved.
C1 [Uhrenholt, H.; Aberg, S.] Lund Univ, S-22100 Lund, Sweden.
[Dobrowolski, A.] UMCS Lublin, Inst Fizyki, PL-20031 Lublin, Poland.
[Dossing, Th] Niels Bohr Inst, DK-2100 Copenhagen, Denmark.
[Ichikawa, T.] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan.
[Moeller, P.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Aberg, S (reprint author), Lund Univ, POB 118, S-22100 Lund, Sweden.
EM sven.aberg@matfys.lth.se
OI Moller, Peter/0000-0002-5848-3565
FU Swedish National Research Council (VR); National Nuclear Security
Administration of the U.S. Department of Energy at Los Alamos National
Laboratory [DE-AC52-06NA25396]; [DE-FG02-06ER41407]
FX H.U. is grateful for the hospitality of the Los Alamos National
Laboratory during several visits. S.A. and H.U. thank the Swedish
National Research Council (VR) for support. This work was supported by
travel grants for P.M. to JUSTIPEN (Japan-U.S. Theory Institute for
Physics with Exotic Nuclei) under grant number DE-FG02-06ER41407 (U.
Tennessee). This work was partially carried out under the auspices of
the National Nuclear Security Administration of the U.S. Department of
Energy at Los Alamos National Laboratory under Contract No.
DE-AC52-06NA25396.
NR 58
TC 6
Z9 6
U1 0
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD SEP 2
PY 2013
VL 913
BP 127
EP 156
DI 10.1016/j.nuclphysa.2013.06.002
PG 30
WC Physics, Nuclear
SC Physics
GA 197KA
UT WOS:000322848900007
ER
PT J
AU Paull, RE
Carroll, A
Chen, NJ
AF Paull, Robert E.
Carroll, Andrew
Chen, Nancy Jung
TI Lotus Cell Walls and the Genes Involved in its Synthesis and
Modification
SO TROPICAL PLANT BIOLOGY
LA English
DT Article
DE Cell walls; Transferases; Hydrolases; Tannins; Lignin; Ethylene
ID CARBOHYDRATE-ACTIVE ENZYMES; POLYPHENOL OXIDASE; LAND PLANTS;
ARABIDOPSIS-THALIANA; LIGNIN BIOSYNTHESIS; NELUMBO-NUCIFERA; SACRED
LOTUS; FAMILY; EXPRESSION; EVOLUTION
AB The lotus genome (Nelumbo nucifera (Gaertn.)) lacks the paleo-triplication found in other eudicots and has evolved remarkably slowly with fewer nucleotide mutations. It is thought to have greater retention of duplicated genes than other angiosperms. We evaluated the potential genes involved in cell wall synthesis and its modification, and ethylene synthesis and response. In many cell wall transferases and hydrolases families, lotus had fewer members in most families when compared to Arabidopsis. Lotus had similar or fewer members in each family as found in poplar, grape and papaya. The exceptions were in the sialyl and beta-glucuronsyl transferases where similar number were found as in the core eudicots. Lotus had similar numbers of polygalacturonase and pectin methyl esterases as found in Arabidopsis but fewer in all other hydrolases families. For starch degradation, lotus had only two alpha amylases predicted genes versus eight to ten in other eudicots, with similar numbers of beta amylase genes predicted. Lotus also had less than half the number of genes predicted for the enzymes involved in lignin and tannin synthesis compared to Arabidopsis. The stress plant growth regulator ethylene's synthesis, reception and response predicted genes were fewer in lotus than other eudicots. Only two ethylene receptor genes were predicted in lotus with five reported for Arabidopsis and six for tomato. Our analysis does not supports the conclusion that this species has greater retention of duplicated genes though our data does support the conclusion that lotus split occurred at the base of the eudicots.
C1 [Paull, Robert E.; Chen, Nancy Jung] Univ Hawaii Manoa, Honolulu, HI 96822 USA.
[Carroll, Andrew] Lawrence Berkeley Natl Lab, Joint BioEnergy Inst, Emeryville, CA 94608 USA.
RP Paull, RE (reprint author), Univ Hawaii Manoa, Honolulu, HI 96822 USA.
EM paull@hawaii.edu; awcarroll@lbl.gov; Jungc@hawaii.edu
NR 54
TC 0
Z9 1
U1 2
U2 11
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1935-9756
EI 1935-9764
J9 TROP PLANT BIOL
JI Trop. Plant Biol.
PD SEP
PY 2013
VL 6
IS 2-3
BP 152
EP 160
DI 10.1007/s12042-013-9129-x
PG 9
WC Plant Sciences
SC Plant Sciences
GA AK1UR
UT WOS:000338203100008
ER
PT J
AU Chaudhri, VK
Cheng, BH
Overholtzer, A
Roschelle, J
Spaulding, A
Clark, P
Greaves, M
Gunning, D
AF Chaudhri, Vinay K.
Cheng, Britte Haugan
Overholtzer, Adam
Roschelle, Jeremy
Spaulding, Aaron
Clark, Peter
Greaves, Mark
Gunning, Dave
TI Invite Biology: A Textbook that Answers Questions
SO AI MAGAZINE
LA English
DT Article
ID KNOWLEDGE; COMPREHENSION; COHESION
AB Inquire Biology is a prototype of a new kind of intelligent textbook one that answers students' questions, engages their interest, and improves their understanding. Inquire Biology provides unique capabilities through a knowledge representation that captures conceptual knowledge from the textbook and uses inference procedures to answer students' questions. Students ask questions by typing free-form natural language queries or by selecting passages of tat. The System then attempts to answer the question and also generates suggested questions related to the query or selection. The questions supported by the system were chosen to be educationally useful, for example: what is the structure of X? compare X and Y? how does X relate to Y? In user studies, students found this question-answering capability to be extremely useful while reading and while doing problem solving. In an initial controlled experiment, community college students using the Inquire Biology prototype outperformed students using either a hard copy or conventional ebook version of the same biology textbook. While additional research is needed to fully develop Inquire Biology, the initial prototype clearly demonstrates the promise of applying knowledge representation and question-answering technology to electronic textbooks.
C1 [Cheng, Britte Haugan] SRI Int, Ctr Technol Learning, Menlo Pk, CA USA.
[Overholtzer, Adam] SRI Int, Menlo Pk, CA USA.
[Spaulding, Aaron] SRIs Artificial Intelligence Ctr, Menlo Pk, CA USA.
[Clark, Peter; Greaves, Mark; Gunning, Dave] Vulcan Inc, Seattle, WA USA.
[Greaves, Mark] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Gunning, Dave] Palo Alto Res Ctr, Palo Alto, CA USA.
RP Chaudhri, VK (reprint author), SRI Int, Ctr Artificial Intelligence, Menlo Pk, CA 94025 USA.
FU Vulcan Inc.
FX This work has been funded by Vulcan Inc. The authors wish to thank the
members of the Inquire Biology development team: Eva Banik, Roger
Corman, Nikhil Dinesh, Debbie Frazier, Stijn Heymans, Sue Hinojoza, Eric
Kow, David Margolies, Ethan Stone, William Webb, Michael Wessel, and
Neil Yorke-Smith.
NR 41
TC 3
Z9 3
U1 1
U2 6
PU AMER ASSOC ARTIFICIAL INTELL
PI MENLO PK
PA 445 BURGESS DRIVE, MENLO PK, CA 94025-3496 USA
SN 0738-4602
J9 AI MAG
JI AI Mag.
PD FAL
PY 2013
VL 34
IS 3
BP 55
EP 72
PG 18
WC Computer Science, Artificial Intelligence
SC Computer Science
GA AI5FX
UT WOS:000336891900005
ER
PT J
AU Beyerlein, IJ
Wang, J
Zhang, R
AF Beyerlein, Irene J.
Wang, Jian
Zhang, Ruifeng
TI Interface-dependent nucleation in nanostructured layered composites
SO APL MATERIALS
LA English
DT Article
ID SIMULATIONS; DEFORMATION; NANOLAYER
AB Nanocomposite properties are to a large extent governed by interface-associated mechanisms. Via atomic-scale modeling of bi-phase interfaces, we reveal a strong correlation between interface structure and the nucleation of dislocations. We show that the number and types of dislocations that are emitted depend sensitively on a few key structural features of the interface. Based on these insights, a model is developed that connects nucleation propensity with interface structure. This finding implies that tuning interface structure is a conceivable approach for strengthening nanocomposites, one that is distinct from the common strategy of shrinking nanostructure dimensions. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
C1 [Beyerlein, Irene J.; Zhang, Ruifeng] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Wang, Jian] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Beyerlein, IJ (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM Irene@lanl.gov
RI Beyerlein, Irene/A-4676-2011; Wang, Jian/F-2669-2012
OI Wang, Jian/0000-0001-5130-300X
FU Center for Materials at Irradiation and Mechanical Extremes, an Energy
Frontier Research Center; U.S. Department of Energy, Office of Science,
Office of Basic Energy Sciences [2008LANL1026]; National Nuclear
Security Administration of the U.S. Department of Energy
[DE-AC52-06NA25396]
FX The authors gratefully acknowledge support provided by the Center for
Materials at Irradiation and Mechanical Extremes, an Energy Frontier
Research Center funded by the U.S. Department of Energy, Office of
Science, Office of Basic Energy Sciences under Award No. 2008LANL1026.
Los Alamos National Laboratory, an affirmative action equal opportunity
employer, is operated by Los Alamos National Security, LLC, for the
National Nuclear Security Administration of the U.S. Department of
Energy under Contract No. DE-AC52-06NA25396.
NR 25
TC 19
Z9 19
U1 0
U2 21
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 2166-532X
J9 APL MATER
JI APL Mater.
PD SEP
PY 2013
VL 1
IS 3
AR 032112
DI 10.1063/1.4820424
PG 8
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA AC1RP
UT WOS:000332274000014
ER
PT J
AU Disa, AS
Kumah, DP
Ngai, JH
Specht, ED
Arena, DA
Walker, FJ
Ahn, CH
AF Disa, A. S.
Kumah, D. P.
Ngai, J. H.
Specht, E. D.
Arena, D. A.
Walker, F. J.
Ahn, C. H.
TI Phase diagram of compressively strained nickelate thin films
SO APL MATERIALS
LA English
DT Article
ID METAL-INSULATOR-TRANSITION; FIELD-EFFECT TRANSISTOR; RNIO3 R;
PRESSURE-DEPENDENCE; MOTT TRANSITION; RARE-EARTH; PEROVSKITES; NDNIO3;
PRNIO3; EU
AB The complex phase diagrams of strongly correlated oxides arise from the coupling between physical and electronic structure. This can lead to a renormalization of the phase boundaries when considering thin films rather than bulk crystals due to reduced dimensionality and epitaxial strain. The well-established bulk RNiO3 phase diagram shows a systematic dependence between the metal-insulator transition and the perovskite A-site rare-earth ion, R. Here, we explore the equivalent phase diagram for nickelate thin films under compressive epitaxial strain. We determine the metal-insulator phase diagram for the solid solution of Nd1-yLayNiO3 thin films within the range 0 <= y <= 1. We find qualitative similarity between the films and their bulk analogs, but with an overall renormalization in the metal-insulator transition to lower temperature. A combination of x-ray diffraction measurements and soft x-ray absorption spectroscopy indicates that the renormalization is due to increased Ni-O bond hybridization for coherently strained thin films. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
C1 [Disa, A. S.; Kumah, D. P.; Ngai, J. H.; Walker, F. J.; Ahn, C. H.] Yale Univ, Dept Appl Phys, Ctr Res Interface Struct & Phenomena, New Haven, CT 06511 USA.
[Ahn, C. H.] Yale Univ, Dept Mech Engn & Mat Sci, New Haven, CT 06511 USA.
[Specht, E. D.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37830 USA.
[Arena, D. A.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
RP Disa, AS (reprint author), Yale Univ, Dept Appl Phys, Ctr Res Interface Struct & Phenomena, New Haven, CT 06511 USA.
EM ankit.disa@yale.edu
RI Kumah, Divine/A-7031-2011; Specht, Eliot/A-5654-2009;
OI Kumah, Divine/0000-0003-0715-1285; Specht, Eliot/0000-0002-3191-2163;
Walker, Frederick/0000-0002-8094-249X
FU DARPA [W911NF-10-1-0206]; NSF MRSEC [DMR 1119826]; U.S. Department of
Energy, Office of Science, Office of Basic Energy Sciences
[DE-AC02-06CH11357, DE-AC02-98CH10886]
FX This work was supported by DARPA Grant No. W911NF-10-1-0206 and NSF
MRSEC DMR 1119826 (CRISP). Use of the Advanced Photon Source is
supported by the U.S. Department of Energy, Office of Science, Office of
Basic Energy Sciences under Contract No. DE-AC02-06CH11357. Use of the
National Synchrotron Light Source, Brookhaven National Laboratory, is
supported by the U.S. Department of Energy, Office of Science, Office of
Basic Energy Sciences, under Contract No. DE-AC02-98CH10886.
NR 25
TC 14
Z9 14
U1 3
U2 46
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 2166-532X
J9 APL MATER
JI APL Mater.
PD SEP
PY 2013
VL 1
IS 3
AR 032110
DI 10.1063/1.4820431
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA AC1RP
UT WOS:000332274000012
ER
PT J
AU Hunter, A
Beyerlein, IJ
AF Hunter, A.
Beyerlein, I. J.
TI Unprecedented grain size effect on stacking fault width
SO APL MATERIALS
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATION; PLASTIC-DEFORMATION MECHANISMS;
NANOCRYSTALLINE METALS; DISLOCATION DYNAMICS; MEDIATED PLASTICITY; FCC
CRYSTALS; CUBIC METALS; THIN-FILMS; CRACK-TIP; NUCLEATION
AB Using an atomistic-phase field dislocation dynamics model, we isolate and investigate grain size and stress effects on the stacking fault width created by partial dislocation emission from a boundary. We show that the nucleation stress for a Shockley partial is governed by size of the boundary defect and insensitive to grain size. We reveal a grain size regime in which the maximum value the stacking fault width attains increases with grain size. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
C1 [Hunter, A.] Los Alamos Natl Lab, Computat Div X, Los Alamos, NM 87545 USA.
[Beyerlein, I. J.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Hunter, A (reprint author), Los Alamos Natl Lab, Computat Div X, POB 1663, Los Alamos, NM 87545 USA.
EM ahunter@lanl.gov
RI Beyerlein, Irene/A-4676-2011;
OI Hunter, Abigail/0000-0002-0443-4020
FU Los Alamos National Laboratory Directed Research and Development (LDRD)
[20130745ECR]; Los Alamos National LDRD [DR20110029]
FX A.H. would like to acknowledge support from the Los Alamos National
Laboratory Directed Research and Development (LDRD) Project 20130745ECR.
I.J.B. gratefully acknowledges support from the Los Alamos National LDRD
Project DR20110029. The authors gratefully acknowledge valuable
discussions with Dr. Timothy C. Germann.
NR 53
TC 16
Z9 16
U1 5
U2 25
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 2166-532X
J9 APL MATER
JI APL Mater.
PD SEP
PY 2013
VL 1
IS 3
AR 032109
DI 10.1063/1.4820427
PG 9
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA AC1RP
UT WOS:000332274000011
ER
PT J
AU Schubert, S
Ruiz-Oses, M
Ben-Zvi, I
Kamps, T
Liang, X
Muller, E
Muller, K
Padmore, H
Rao, T
Tong, X
Vecchione, T
Smedley, J
AF Schubert, S.
Ruiz-Oses, M.
Ben-Zvi, I.
Kamps, T.
Liang, X.
Muller, E.
Mueller, K.
Padmore, H.
Rao, T.
Tong, X.
Vecchione, T.
Smedley, J.
TI Bi-alkali antimonide photocathodes for high brightness accelerators
SO APL MATERIALS
LA English
DT Article
ID RAY PHOTOELECTRON-SPECTROSCOPY; PHOTO-CATHODES; PHOTOEMITTERS; OXYGEN;
CS
AB Alkali-antimonide photocathodes were grown on Si(100) and studied by means of XPS and UHV-AFM to validate the growth procedure and morphology of this material. The elements were evaporated sequentially at elevated substrate temperatures (first Sb, second K, third Cs). The generated intermediate K-Sb compound itself is a photocathode and the composition of K2.4Sb is close to the favored K3Sb stoichiometry. After cesium deposition, the surface layer is cesium enriched. The determined rms roughness of 25 nm results in a roughness domination of the emittance in the photoinjector already above 3 MV/m. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
C1 [Schubert, S.; Kamps, T.] Helmholtz Zentrum Berlin, D-12489 Berlin, Germany.
[Schubert, S.; Muller, E.; Rao, T.; Smedley, J.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Ruiz-Oses, M.; Ben-Zvi, I.; Liang, X.] SUNY Stony Brook, Stony Brook, NY 11794 USA.
[Mueller, K.; Tong, X.] BNL, Ctr Funct Nanomat, Upton, NY 11973 USA.
[Padmore, H.; Vecchione, T.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Smedley, J (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM smedley@bnl.gov
RI Muller, Kathrin/H-1902-2011
FU U.S. Department of Energy, Office of Basic Energy Sciences
[DE-AC02-98CH10886]; U.S. Department of Energy (DOE) [KC-04-01-010,
DE-FG02-12ER41837]; Bundesministerium fuer Bildung und Forschung (BMBF);
Land Berlin, Germany
FX Research carried out in whole at the Center for Functional
Nanomaterials, Brookhaven National Laboratory, which is supported by the
U.S. Department of Energy, Office of Basic Energy Sciences, under
Contract No. DE-AC02-98CH10886. Funding was received from the U.S.
Department of Energy (DOE) under Grant Nos. KC-04-01-010 and
DE-FG02-12ER41837 and the Bundesministerium fuer Bildung und Forschung
(BMBF) and the Land Berlin, Germany.
NR 21
TC 17
Z9 17
U1 0
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 2166-532X
J9 APL MATER
JI APL Mater.
PD SEP
PY 2013
VL 1
IS 3
AR 032119
DI 10.1063/1.4821625
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA AC1RP
UT WOS:000332274000021
ER
PT J
AU Maalouf, J
Cogswell, ME
Gunn, JP
Curtis, CJ
Rhodes, D
Hoy, K
Pehrsson, P
Nickle, M
Merritt, R
AF Maalouf, Joyce
Cogswell, Mary E.
Gunn, Janelle P.
Curtis, Christine J.
Rhodes, Donna
Hoy, Kathy
Pehrsson, Pamela
Nickle, Melissa
Merritt, Robert
TI Monitoring the Sodium Content of Restaurant Foods: Public Health
Challenges and Opportunities
SO AMERICAN JOURNAL OF PUBLIC HEALTH
LA English
DT Review
ID TAKE-AWAY FOODS; AUSTRALIAN FOODS; NUTRITIONAL PROFILE; MINERAL-CONTENT;
PROXIMATE; MEALS; BAHRAIN; ENERGY; CHAINS; MENU
AB We reviewed methods of studies assessing restaurant foods' sodium content and nutrition databases. We systematically searched the 1964-2012 literature and manually examined references in selected articles and studies.
Twenty-six (5.2%) of the 499 articles we found met the inclusion criteria and were abstracted. Five were conducted nationally. Sodium content determination methods included laboratory analysis (n = 15), point-of-purchase nutrition information or restaurants' Web sites (n = 8), and menu analysis with a nutrient database (n = 3).
There is no comprehensive data system that provides all information needed to monitor changes in sodium or other nutrients among restaurant foods. Combining information from different sources and methods may help inform a comprehensive system to monitor sodium content reduction efforts in the US food supply and to develop future strategies.
C1 [Maalouf, Joyce; Cogswell, Mary E.; Gunn, Janelle P.; Merritt, Robert] Ctr Dis Control & Prevent CDC, Div Heart Dis & Stroke Prevent, Natl Ctr Chron Dis Prevent & Hlth Promot, Atlanta, GA USA.
[Maalouf, Joyce] Oak Ridge Inst Sci & Educ, Oak Ridge, TN USA.
[Curtis, Christine J.] New York City Dept Hlth & Mental Hyg, Nutr Strategy Program, New York, NY USA.
[Rhodes, Donna; Hoy, Kathy] ARS, USDA, Beltsville Human Nutr Res Ctr, Food Surveys Res Grp, Beltsville, MD USA.
[Pehrsson, Pamela; Nickle, Melissa] ARS, USDA, Beltsville Human Nutr Res Ctr, Nutrient Data Lab, Beltsville, MD USA.
RP Maalouf, J (reprint author), Ctr Dis Control & Prevent, Epidemiol & Surveillance Branch, Div Heart Dis & Stroke Prevent, Natl Ctr Chron Dis Prevent & Hlth Promot, 4770 Buford Hwy NE,Mailstop F72, Atlanta, GA 30341 USA.
EM vjh6@cdc.gov
FU Oak Ridge Institute for Science and Education Research Participation
Programs at the Centers for Disease Control and Prevention (CDC)
FX J. Maalouf was supported by the Oak Ridge Institute for Science and
Education Research Participation Programs at the Centers for Disease
Control and Prevention (CDC).
NR 54
TC 1
Z9 2
U1 0
U2 5
PU AMER PUBLIC HEALTH ASSOC INC
PI WASHINGTON
PA 800 I STREET, NW, WASHINGTON, DC 20001-3710 USA
SN 0090-0036
EI 1541-0048
J9 AM J PUBLIC HEALTH
JI Am. J. Public Health
PD SEP
PY 2013
VL 103
IS 9
BP E21
EP E30
DI 10.2105/AJPH.2013.301442
PG 10
WC Public, Environmental & Occupational Health
SC Public, Environmental & Occupational Health
GA AA3NB
UT WOS:000330998200010
PM 23865701
ER
PT J
AU He, YX
Luo, T
Wang, JH
Wang, B
Xiong, W
Li, FR
AF He, Yongxiu
Luo, Tao
Wang, Jianhui
Wang, Bing
Xiong, Wei
Li, F. R.
TI Analysis of Reasonable Energy Price Ratios in China
SO JOURNAL OF ENERGY ENGINEERING
LA English
DT Article
DE Energy; Price ratios; Input/output relationship; Economic standards;
International standards
ID POLICY
AB As a result of China's rapid economic growth, energy demand has increased significantly in recent years. Consequently, energy pricing has become increasingly prominent. This paper defines reasonable energy price ratios and establishes models to analyze them from the aspects of input/output standards, economic standards, and international standards according to the structure of the energy prices. Furthermore, based on the socioeconomic conditions in China, prices of coal, natural gas, and electric power are selected as examples for analyzing the price ratios of regulated and nonregulated energy prices under three evaluation criteria. Finally, reasonable energy price ratios in China are determined through a comprehensive analysis. The paper concludes that these ratios are significant for developing countries undergoing energy market oriented reforms such as China. (C) 2013 American Society of Civil Engineers.
C1 [He, Yongxiu] North China Elect Power Univ, Sch Econ & Management, Beijing 102206, Peoples R China.
[Luo, Tao] Guizhou Power Grid Co, Guiyang Power Supply Bur, Guiyang 550001, Peoples R China.
[Wang, Jianhui] Argonne Natl Lab, Decis & Informat Sci Div, Argonne, IL 60439 USA.
[Wang, Jianhui] Shanghai Univ Elect Power, Sch Econ & Management, Shanghai, Peoples R China.
[Wang, Bing; Xiong, Wei] North China Elect Power Univ, Sch Econ & Management, Beijing 102206, Peoples R China.
[Li, F. R.] Univ Bath, Dept Elect & Elect Engn, Bath BA2 7AY, Avon, England.
RP He, YX (reprint author), North China Elect Power Univ, Sch Econ & Management, Bei Nong Lu 2, Beijing 102206, Peoples R China.
EM heyongxiu@ncepu.edu.cn; luotao9902@126.com; jianhui.wang@anl.gov;
bingw1130@126.com; xw471559631@sina.com; eesfl@bath.ac.uk
FU National Natural Science Foundation of China [71273089]; Beijing Natural
Science Foundation of China [9122022]; U.S. Department of Energy
[DE-AC02-06CH11357]
FX The work described in this paper was supported by the National Natural
Science Foundation of China (Grant No. 71273089) and Beijing Natural
Science Foundation of China (Grant No. 9122022). Argonne National
Laboratory's work was supported under U.S. Department of Energy contract
DE-AC02-06CH11357.
NR 24
TC 1
Z9 1
U1 1
U2 8
PU ASCE-AMER SOC CIVIL ENGINEERS
PI RESTON
PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
SN 0733-9402
EI 1943-7897
J9 J ENERG ENG
JI J. Energy Eng.-ASCE
PD SEP
PY 2013
VL 139
IS 3
BP 214
EP 222
DI 10.1061/(ASCE)EY.1943-7897.0000111
PG 9
WC Energy & Fuels; Engineering, Civil
SC Energy & Fuels; Engineering
GA 301EW
UT WOS:000330516600008
ER
PT J
AU Long, X
Ma, YR
Cho, KR
Li, DS
De Yoreo, JJ
Qi, LM
AF Long, Xia
Ma, Yurong
Cho, Kang Rae
Li, Dongsheng
De Yoreo, James J.
Qi, Limin
TI Oriented Calcite Micropillars and Prisms Formed through Aggregation and
Recrystallization of Poly(Acrylic Acid) Stabilized Nanoparticles
SO CRYSTAL GROWTH & DESIGN
LA English
DT Article
ID URCHIN LARVAL SPICULE; SINGLE-CRYSTALS; CARBONATE MORPHOLOGY; AMORPHOUS
PRECURSOR; PHASE; BIOMINERALIZATION; GROWTH; SYSTEMS; CRYSTALLIZATION;
MINERALIZATION
AB Though calcium carbonate crystals with various morphologies have been successfully fabricated via bioinspired methods, the mechanism underlying crystallization of one-dimensional (1D) calcite microstructures along defined crystallographic axes is poorly understood. In this paper, we first show that by combining the effects of poly(acrylic acid) (PAA) and calcite substrates we can direct the formation of calcite through an intermediate complex of PAA and Ca2(+). into oriented calcite micropillars with {104} faceted coaligned platelike subunits. Moreover, in situ AFM studies under different conditions than those used in bulk experiments also lead to formation of ID calcite microstructures. With a slight change in conditions, arrays of oriented calcite prisms with triangular cross sections are formed on calcite substrates. Though distinct in morphology, these pillars and prisms form in a similar way via anisotropic nanoparticle aggregation, growth, fusion, and reorganization. The results may provide new insights into mechanisms of biomineralization.
C1 [Long, Xia; Ma, Yurong; Qi, Limin] Peking Univ, Coll Chem, State Key Lab Struct Chem Unstable & Stable Speci, BNLMS, Beijing 100871, Peoples R China.
[Cho, Kang Rae; Li, Dongsheng; De Yoreo, James J.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA.
RP Ma, YR (reprint author), Peking Univ, Coll Chem, State Key Lab Struct Chem Unstable & Stable Speci, BNLMS, Beijing 100871, Peoples R China.
EM yurong.ma@pku.edu.cn; jjdeyoreo@lbl.gov; liminqi@pku.edu.cn
RI Qi, Limin/A-4203-2009; LONG, XIA/L-1517-2015; Foundry,
Molecular/G-9968-2014
OI Qi, Limin/0000-0003-4959-6928;
FU National Natural Science Foundation of China [51272298, 21173010,
21073005, 51121091]; China Scholarship Council; Division of Chemical
Sciences, Geosciences, and Biosciences of the US Department of Energy;
Molecular Foundry, Lawrence Berkeley National Laboratory, an Office of
Science, Office of Basic Energy Sciences, Scientific User Facility
[DE-AC02-05CH11231]
FX Financial support from the National Natural Science Foundation of China
(Grants 51272298, 21173010, 21073005, and 51121091), China Scholarship
Council are gratefully acknowledged. The AFM studies were supported by
the Division of Chemical Sciences, Geosciences, and Biosciences of the
US Department of Energy and performed at the Molecular Foundry, Lawrence
Berkeley National Laboratory, an Office of Science, Office of Basic
Energy Sciences, Scientific User Facility under Contract
DE-AC02-05CH11231.
NR 62
TC 8
Z9 8
U1 5
U2 39
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1528-7483
EI 1528-7505
J9 CRYST GROWTH DES
JI Cryst. Growth Des.
PD SEP
PY 2013
VL 13
IS 9
BP 3856
EP 3863
DI 10.1021/cg4010399
PG 8
WC Chemistry, Multidisciplinary; Crystallography; Materials Science,
Multidisciplinary
SC Chemistry; Crystallography; Materials Science
GA 295DC
UT WOS:000330095800004
ER
PT J
AU Eaton, SJ
Beis, SH
Bunting, BG
Fitzpatrick, SW
van Walsum, GP
Pendse, HP
Wheeler, MC
AF Eaton, Scott J.
Beis, Sedat H.
Bunting, Bruce G.
Fitzpatrick, Stephen W.
van Walsum, G. Peter
Pendse, Hemant P.
Wheeler, M. Clayton
TI Characterization and Combustion of Crude Thermal Deoxygenation Oils
Derived From Hydrolyzed Woody Biomass
SO ENERGY & FUELS
LA English
DT Article
ID LEVULINIC ACID; CETANE NUMBER; FUELS; IMPROVEMENT; CONVERSION;
CATALYSTS; PRODUCTS
AB Thermal Deoxygenation (TDO) is a reaction converting calcium-neutralized, biomass-derived acids to crude hydrocarbons at 450 degrees C in an inert atmosphere at ambient pressure. In this work, TDO is applied to hydrolyzate produced by the Biofine process to determine the effects of impurities on TDO oil yield and composition. The oils were characterized for fuel and material properties according to ASTM methods. The oils were found to have low total acid number (<1.4) and a consistent. boiling point distribution according to high temperature simulated distillation (ASTM 7169) of between 75 degrees and 585 degrees C. Combustion and emission characteristics of TDO crude oil as a 50/50 vol. % blend with ultralow sulfur diesel were consistent with fuels of low cetane number. This is attributed to the low hydrogen content of the oils (9.4 wt %) and high aromaticity.
C1 [Eaton, Scott J.; van Walsum, G. Peter; Pendse, Hemant P.; Wheeler, M. Clayton] Univ Maine, Dept Chem & Biol Engn, Orono, ME 04469 USA.
[Beis, Sedat H.; van Walsum, G. Peter; Pendse, Hemant P.; Wheeler, M. Clayton] Univ Maine, Forest Bioprod Res Inst, Orono, ME 04469 USA.
[Eaton, Scott J.] SeaChange Grp LLC, Cape Elizabeth, ME 04107 USA.
[Bunting, Bruce G.] Oak Ridge Natl Lab, Fuels Engines & Emiss Res Ctr, Knoxville, TN 37932 USA.
[Fitzpatrick, Stephen W.] Biofine Technol LLC, Framingham, MA 01701 USA.
RP Wheeler, MC (reprint author), Univ Maine, Dept Chem & Biol Engn, Orono, ME 04469 USA.
EM cwheeler@umche.maine.edu
RI Wheeler, M Clayton/C-9649-2012
OI Wheeler, M Clayton/0000-0003-1113-1324
FU U.S. Department of Energy, Office of Science Experimental Program to
Stimulate Competitive Research Grant [DE-FG02-07ER46373]; U.S.
Department of Energy Office of Biomass [DE-FG02-08ER64635]; U.S.
Logistics Research and Development Program at the Headquarters of the
Defense Logistics Agency, Fort Belvoir, VA [SP4701-11-C-0010]
FX The authors gratefully acknowledge Adriaan van Heiningen and Paige Case
for their valuable advice and support. This work was funded in part by
the U.S. Department of Energy, Office of Science Experimental Program to
Stimulate Competitive Research Grant No. DE-FG02-07ER46373, the U.S.
Department of Energy Office of Biomass Grant No. DE-FG02-08ER64635, and
the U.S. Logistics Research and Development Program at the Headquarters
of the Defense Logistics Agency, Fort Belvoir, VA on project
SP4701-11-C-0010.
NR 21
TC 4
Z9 4
U1 0
U2 16
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0887-0624
EI 1520-5029
J9 ENERG FUEL
JI Energy Fuels
PD SEP
PY 2013
VL 27
IS 9
BP 5246
EP 5252
DI 10.1021/ef4007033
PG 7
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA 295ES
UT WOS:000330100000023
ER
PT J
AU van Dam, HJJ
Vishnu, A
de Jong, WA
AF van Dam, Hubertus J. J.
Vishnu, Abhinav
de Jong, Wibe A.
TI A Case for Soft Error Detection and Correction in Computational
Chemistry
SO JOURNAL OF CHEMICAL THEORY AND COMPUTATION
LA English
DT Article
ID RESILIENCE
AB High performance computing platforms are expected to deliver 1018 floating operations per second by the year 2022 through the deployment of millions of cores. Even if every core is highly reliable the sheer number of them will mean that the mean time between failures will become so short that most application runs will suffer at least one fault. In particular soft errors caused by intermittent incorrect behavior of the hardware are a concern as they lead to silent data corruption. In this paper we investigate the impact of soft errors on optimization algorithms using Hartree-Fock as a particular example. Optimization algorithms iteratively reduce the error in the initial guess to reach the intended solution. Therefore they may intuitively appear to be resilient to soft errors. Our results show that this is true for soft errors of small magnitudes but not for large errors. We suggest error detection and correction mechanisms for different classes of data structures. The results obtained with these mechanisms indicate that we can correct more than 95% of the soft errors at moderate increases in the computational cost.
C1 [van Dam, Hubertus J. J.; Vishnu, Abhinav; de Jong, Wibe A.] Pacific NW Natl Lab, Richland, WA 99354 USA.
RP van Dam, HJJ (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd, Richland, WA 99354 USA.
EM hubertus.vandam@pnnl.gov; abhinav.vishnu@pnnl.gov; wadejong@lbl.gov
RI DE JONG, WIBE/A-5443-2008;
OI DE JONG, WIBE/0000-0002-7114-8315; van Dam, Hubertus Johannes
Jacobus/0000-0002-0876-3294
FU eXtreme Scale Computing Initiative at Pacific Northwest National
Laboratory; U.S. Department of Energy by Battelle [DE-AC05-76RL01830]
FX This work was supported by the eXtreme Scale Computing Initiative at
Pacific Northwest National Laboratory. Pacific Northwest National
Laboratory is operated for the U.S. Department of Energy by Battelle.
This work was done in part using EMSL, a national scientific user
facility sponsored by the Department of Energy's Office of Biological
and Environmental Research and located at Pacific Northwest National
Laboratory, operated for the U.S. Department of Energy by Battelle under
contract DE-AC05-76RL01830.
NR 17
TC 5
Z9 5
U1 0
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1549-9618
EI 1549-9626
J9 J CHEM THEORY COMPUT
JI J. Chem. Theory Comput.
PD SEP
PY 2013
VL 9
IS 9
BP 3995
EP 4005
DI 10.1021/ct400489c
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 295DM
UT WOS:000330096800016
PM 26592395
ER
PT J
AU Lange, AW
Voth, GA
AF Lange, Adrian W.
Voth, Gregory A.
TI Multi-state Approach to Chemical Reactivity in Fragment Based Quantum
Chemistry Calculations
SO JOURNAL OF CHEMICAL THEORY AND COMPUTATION
LA English
DT Article
ID MOLECULAR-ORBITAL METHOD; MANY-BODY EXPANSION; WATER CLUSTERS; LARGE
SYSTEMS; ACCURATE CALCULATIONS; TRANSPORT
AB We introduce a multistate framework for Fragment Molecular Orbital (FMO) quantum mechanical calculations and implement it in the context of protonated water clusters. The purpose of the framework is to address issues of nonuniqueness and dynamic fragmentation in FMO as well as other related fragment methods. We demonstrate that our new approach, Fragment Molecular Orbital Multistate Reactive Molecular Dynamics (FMO-MS-RMD), can improve energetic accuracy and yield stable molecular dynamics for small protonated water clusters undergoing proton transfer reactions.
C1 [Lange, Adrian W.] Argonne Natl Lab, Leadership Comp Facil, Argonne, IL 60439 USA.
[Voth, Gregory A.] Univ Chicago, James Franck Inst, Dept Chem, Inst Biophys Dynam, Chicago, IL 60637 USA.
[Voth, Gregory A.] Univ Chicago, Computat Inst, Chicago, IL 60637 USA.
RP Voth, GA (reprint author), Univ Chicago, James Franck Inst, Dept Chem, Inst Biophys Dynam, Chicago, IL 60637 USA.
EM gavoth@uchicago.edu
FU National Science Foundation (NSF) [CHE-1214087]; Air Force Office of
Scientific Research (AFOSR) [FA9550-13-1-0094]; Office of. Advanced
Scientific Computing Research, Office of Science, U.S. Department of
Energy [DE-AC02-06CH11357]; Office of Science of the U.S. Department of
Energy [DE-AC02-06CH11357]
FX This research was supported by the National Science Foundation (NSF,
Grant No. CHE-1214087), the Air Force Office of Scientific Research
(AFOSR, Grant No. FA9550-13-1-0094), and by the Office of. Advanced
Scientific Computing Research, Office of Science, U.S. Department of
Energy, under Contract DE-AC02-06CH11357. This research used resources
of the Argonne Leadership Computing Facility at Argonne National
Laboratory, which is supported by the Office of Science of the U.S.
Department of Energy under contract DE-AC02-06CH11357. This work was
completed in part with resources provided by the University of Chicago
Research Computing Center. AWL is an Argonne Leadership Computing
Facility Early Science Project postdoctoral fellow.
NR 23
TC 10
Z9 10
U1 0
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1549-9618
EI 1549-9626
J9 J CHEM THEORY COMPUT
JI J. Chem. Theory Comput.
PD SEP
PY 2013
VL 9
IS 9
BP 4018
EP 4025
DI 10.1021/ct400516x
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 295DM
UT WOS:000330096800018
PM 26592397
ER
PT J
AU Atwood, D
Soni, A
AF Atwood, David
Soni, Amarjit
TI Searching for the origin of CP violation in Cabibbo-suppressed D-meson
decays
SO PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
LA English
DT Article
ID B-DECAYS; ISOSPIN ANALYSIS; ASYMMETRIES; PHYSICS
AB The recent evidence of relatively large direct CP violation in D-0 decay at LHCb suggests that CP studies in the D system may become an important new avenue for understanding CP just as studies in the B system have proven to be. The current level of CP violation could be consistent with the Standard Model or, perhaps, contain evidence of new physics. A clean Standard Model prediction of the CP violation in these decays would, of course, be important in understanding these results but hadronic uncertainties make such a prediction difficult. In this paper, we make several suggestions to try to seek the role of new physics. We propose that the hadronic enhancement needed to attribute the observed CP violation in D to two pseudoscalar modes may not operate for inclusive final states, where it is likely that we will see asymmetries at the quark level expectation provided the source is the Standard Model. A simple way to implement this is to search for CP asymmetries in final states containing K and (K) over bar but where the sum of their energies is less than the energy of the parent D. This is meant to ensure that the event belongs to an inclusive and not an exclusive sample. We also propose that CP asymmetries may be enhanced in modes where the tree is color suppressed. In particular, the final state rho(0)rho(0) is of special interest because it consists of charged pions only and, in addition, it can have C-even P-odd triple product correlations; similarly, D-s -> rho K-0(+) and rho K-0*(+) also appear interesting. We also emphasize the use of CPT constraints leading to interesting correlations. We then consider how isospin symmetry can provide observables that are sensitive to certain classes of new physics and are small in the Standard Model. In particular, we discuss using isospin analysis in the decays D -> pi pi, rho pi, and rho rho as well as in D-s -> K*pi. We also consider how such analysis may eventually be supplemented by information about the weak phases in D-0 decay. In order to obtain this information experimentally, we consider various methods for preparing an initial state that is a quantum mechanical mixture of D-0 and (D) over bar (0). This may be done through the use of natural D-0/(D) over bar (0) oscillations; observing D-0 mesons that arise from B-d or B-s mesons, which themselves are oscillating, or from quantum correlations in D-0 pairs that arise from either psi '' decay or B-meson decay. Observing CP violation in the magnitudes of decay amplitudes should be within the capability of experiments in the near future; however, obtaining the weak phases through the methods we discuss will likely require future generations of machines due to the large statistics that are likely to be needed.
C1 [Atwood, David] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Soni, Amarjit] Brookhaven Natl Lab, Theory Grp, Upton, NY 11973 USA.
RP Atwood, D (reprint author), Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
EM atwood@iastate.edu
FU US DOE [DE-AC02-98CH10886, DE-FG02-94ER40817]
FX The work of A.S. was supported in part by the US DOE contract
#DE-AC02-98CH10886 (BNL). The work of D.A. was supported in part by the
US DOE contract #DE-FG02-94ER40817 (ISU).
NR 56
TC 4
Z9 4
U1 0
U2 0
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 2050-3911
J9 PROG THEOR EXP PHYS
JI Prog. Theor. Exp. Phys.
PD SEP
PY 2013
IS 9
AR 093B05
DI 10.1093/ptep/ptt065
PG 25
WC Physics, Multidisciplinary; Physics, Particles & Fields
SC Physics
GA 296UN
UT WOS:000330211000007
ER
PT J
AU Assary, RS
Atesin, AC
Li, Z
Curtiss, LA
Marks, TJ
AF Assary, Rajeev S.
Atesin, Abdurrahman C.
Li, Zhi
Curtiss, Larry A.
Marks, Tobin J.
TI Reaction Pathways and Energetics of Etheric C-O Bond Cleavage Catalyzed
by Lanthanide Triflates
SO ACS CATALYSIS
LA English
DT Article
DE biomass conversion; computational ether C-O hydrogenolysis; ionic
liquids; lanthanide triflate catalysts; density functional theory;
activation energy; kinetic isotopic effect
ID ATOMIC LAYER DEPOSITION; TRANSPORTATION FUELS; FURFURYL ALCOHOL;
LEVULINIC ACID; IONIC LIQUIDS; CONVERSION; BIOMASS; CHEMICALS;
CELLULOSE; BIOFUELS
AB Efficient and selective cleavage of etheric C-O bonds is crucial for converting biomass into platform chemicals and liquid transportation fuels. In this contribution, computational methods at the DFT B3LYP level of theory are employed to understand the efficacy of lanthanide triflate catalysts (Ln(OTf)(3), Ln = La, Ce, Sm, Gd, Yb, and Lu) in cleaving etheric C-O bonds. In agreement with experiment, the calculations indicate that the reaction pathway for C-O cleavage occurs via a C-H -> O-H proton transfer in concert with weakening of the C-O bond of the coordinated ether substrate to ultimately yield a coordinated alkenol. The activation energy for this process falls as the lanthanide ionic radius decreases, reflecting enhanced metal ion electrophilicity. Details of the reaction mechanism for Yb(OTf)(3)-catalyzed ring opening are explored in depth, and for 1-methyl-d(3)-butyl phenyl ether, the computed primary kinetic isotope effect of 2.4 is in excellent agreement with experiment (2.7), confirming that etheric ring-opening pathway involves proton transfer from the methyl group alpha to the etheric oxygen atom, which is activated by the electrophilic lanthanide ion. Calculations of the catalytic pathway using eight different ether substrates indicate that the more rapid cleavage of acyclic versus cyclic ethers is largely due to entropic effects, with the former C-O bond scission processes increasing the degrees of freedom/particles as the transition state is approached.
C1 [Assary, Rajeev S.; Curtiss, Larry A.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Curtiss, Larry A.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Atesin, Abdurrahman C.; Li, Zhi; Marks, Tobin J.] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
RP Assary, RS (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM assary@anl.gov; curtiss@anl.gov; t-marks@northwestern.edu
RI Surendran Assary, Rajeev/E-6833-2012; Li, Zhi/D-8662-2011
OI Surendran Assary, Rajeev/0000-0002-9571-3307; Li,
Zhi/0000-0003-2770-6364
FU U.S. Department of Energy [DE-AC0206CH11357]; Institute of Atom
Efficient Chemical Transformation (IACT), an Energy Frontier Research
Center; U.S. Department of Energy, Office of Sciences, and Office of
Basic Energy Sciences; U.S. Department of Energy, Office of Science,
Office of Basic Energy Sciences [DE-AC02-06CH11357]; Office of Science
of the U.S. Department of Energy [DE-AC02-05CH11231]; NSF [CHE-1213235]
FX This work was supported by the U.S. Department of Energy under contract
DE-AC0206CH11357. This material is based upon work supported as part of
the Institute of Atom Efficient Chemical Transformation (IACT), an
Energy Frontier Research Center funded by the U.S. Department of Energy,
Office of Sciences, and Office of Basic Energy Sciences. We gratefully
acknowledge the computing resources provided on "Fusion", a 320-node
computing cluster operated by the Laboratory Computing Resource Center
at Argonne National Laboratory. Use of the Center for Nanoscale
Materials was supported by the U.S. Department of Energy, Office of
Science, Office of Basic Energy Sciences, under Contract No.
DE-AC02-06CH11357. This research also used resources of the National
Energy Research Scientific Computing Center (NERSC), which is supported
by the Office of Science of the U.S. Department of Energy under Contract
No. DE-AC02-05CH11231. We also acknowledge grants of computer time from
EMSL, a national scientific user facility located at the Pacific
Northwest National Laboratory. Z.L. was supported under NSF grant
CHE-1213235 on basic f-element chemistry, which also provided necessary
equipment.
NR 37
TC 17
Z9 17
U1 7
U2 75
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 2155-5435
J9 ACS CATAL
JI ACS Catal.
PD SEP
PY 2013
VL 3
IS 9
BP 1908
EP 1914
DI 10.1021/cs400483q
PG 7
WC Chemistry, Physical
SC Chemistry
GA 294BG
UT WOS:000330016800001
ER
PT J
AU Lemonidou, AA
Vagia, EC
Lercher, JA
AF Lemonidou, Angeliki A.
Vagia, Ekaterini C.
Lercher, Johannes A.
TI Acetic Acid Reforming over Rh Supported on La2O3/CeO2-ZrO2: Catalytic
Performance and Reaction Pathway Analysis
SO ACS CATALYSIS
LA English
DT Article
DE hydrogen production; steam reforming; acetic acid; La2O3/CeO2-ZrO2;
supported Rh
ID NOBLE-METAL CATALYSTS; BIOMASS PYROLYSIS LIQUIDS; BIO-OIL FRACTION;
HYDROGEN-PRODUCTION; PARTIAL OXIDATION; NICKEL-CATALYSTS; THERMODYNAMIC
ANALYSIS; SUSTAINABLE HYDROGEN; REACTION-KINETICS; MODEL COMPOUNDS
AB Reforming of acetic acid was investigated on Rh supported on CeO2-ZrO2 modified with 3 wt % La. The active catalyst converted acetic acid to H-2-rich gas and hardly formed coke. The low rate of coke formation is concluded to be related to the presence of redox-active oxygen limiting the concentration of coke precursors. Temperature-programmed O-18(2)) isotope exchange measurements showed that the La2O3 and Rh enhanced the mobility of lattice oxygen compared with that of the parent CeO2-ZrO2. Ketonization and decarboxylation of acetic acid are the dominating reactions over the latter up to 600 degrees C, whereas above 600 degrees C, steam reforming and water gas shift also contribute. Over 0.5 wt % Rh on La2O3/CeO2-ZrO2, reforming and water gas shift reactions dominate, even below 300 degrees C, producing mostly H-2 and CO2. Using isotope labeling, it is shown that acetic acid adsorbs dissociatively on Rh, forming acetates, which sequentially decarboxylate and form surface methyl groups. The latter are in turn converted to CO, CO2, and H-2.
C1 [Lemonidou, Angeliki A.; Vagia, Ekaterini C.] Aristotle Univ Thessaloniki, Dept Chem Engn, GR-54124 Thessaloniki, Greece.
[Lercher, Johannes A.] Pacific NW Natl Lab, Inst Integrated Catalysis, Richland, WA 99352 USA.
[Lercher, Johannes A.] Tech Univ Munich, Dept Chem, D-85748 Garching, Germany.
[Lercher, Johannes A.] Tech Univ Munich, Catalysis Res Ctr, D-85748 Garching, Germany.
RP Lemonidou, AA (reprint author), Aristotle Univ Thessaloniki, Dept Chem Engn, Univ Campus, GR-54124 Thessaloniki, Greece.
EM alemonidou@cheng.auth.gr
FU PENED programme; E.U.-European Social Fund; Greek Ministry of
Development-GSRT
FX Angeliki Lemonidou and Ekaterini Vagia acknowledge funding in part from
the PENED programme that is cofinanced by E.U.-European Social Fund
(75%) and the Greek Ministry of Development-GSRT (25%).
NR 62
TC 14
Z9 14
U1 6
U2 41
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 2155-5435
J9 ACS CATAL
JI ACS Catal.
PD SEP
PY 2013
VL 3
IS 9
BP 1919
EP 1928
DI 10.1021/cs4003063
PG 10
WC Chemistry, Physical
SC Chemistry
GA 294BG
UT WOS:000330016800003
ER
PT J
AU Koenigsmann, C
Wong, SS
AF Koenigsmann, Christopher
Wong, Stanislaus S.
TI Tailoring Chemical Composition To Achieve Enhanced Methanol Oxidation
Reaction and Methanol-Tolerant Oxygen Reduction Reaction Performance in
Palladium-Based Nanowire Systems
SO ACS CATALYSIS
LA English
DT Article
DE direct methanol fuel cell; formic acid oxidation; one-dimensional
morphology; noble metal nanostructure; electrocatalysis
ID FORMIC-ACID ELECTROOXIDATION; DENSITY-FUNCTIONAL THEORY; FUEL-CELLS;
ELECTROCATALYTIC PERFORMANCE; NANOPARTICLES; ALLOY; NANOTUBES;
CATALYSTS; ULTRATHIN; SURFACE
AB In this article, we address two key challenges in the development of electrocatalysts for direct methanol fuel cells by rationally tailoring the morphology and chemical composition of Pd-based nanowires (NWs) for enhanced performance. First, we have examined the morphology and composition-dependent performance of Pt1-xPdx NWs toward the methanol oxidation reaction (MOR). Elemental Pt NWs were found to possess a significant morphology-dependent enhancement of nearly 3-fold in terms of peak MOR-specific activity over that of commercial Pt NP/C. In addition, tailoring the chemical composition in Pt(1-x)Pdx NWs can lead to measurable increases in MOR kinetics, which can be attributed to improved oxidation of formic acid and, potentially, increased selectivity for a direct, CO-free pathway. Second, we have explored the stability of ORR performance in the presence of measurable concentrations of methanol as a function of chemical composition in Pt(1-x)Pdx NWs and Pt-free Pd9Au NWs. In the context of the Pt1-xPdx NWs, a distinctive volcano-type dependence has been noted with respect to chemical composition, and on the basis of the MOR activities and methanol tolerant ORR behavior, Pt7Pd3 NWs have been highlighted as an optimal catalyst architecture. We have also analyzed the methanol tolerance in Pd9Au NWs, which represents a highly active, durable Pt-free alternative to traditional Pt-based nanostructured catalysts. Herein, we have demonstrated that Pd9Au NWs (0.42 mA/cm(2)) with no effective Pt content can outperform Pt-based nanostructures, such as Pt NWs (0.32 rnA/cm(2)) and nanoparticulate Pt NP/C (0.24 mA/cm(2)) in the presence of 4 mM methanol/0.1 M HClO4.
C1 [Koenigsmann, Christopher; Wong, Stanislaus S.] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
[Wong, Stanislaus S.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
RP Wong, SS (reprint author), SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
EM stanislaus.wong@stonybrook.edu
FU U.S. Department of Energy, Basic Energy Sciences, Materials Sciences and
Engineering Division; U.S. Department of Energy [DE-ACO2-98CH10886]
FX Research (including support for C.K. and S.S.W. and electrochemical
experiments) was supported by the U.S. Department of Energy, Basic
Energy Sciences, Materials Sciences and Engineering Division. We also
thank R. R. Adzic and M. B. Vukmirovic for use of their facilities and
assistance with electrochemical measurements at Brookhaven National
Laboratory, which is supported by the U.S. Department of Energy under
Contract No. DE-ACO2-98CH10886.
NR 61
TC 26
Z9 26
U1 7
U2 83
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 2155-5435
J9 ACS CATAL
JI ACS Catal.
PD SEP
PY 2013
VL 3
IS 9
BP 2031
EP 2040
DI 10.1021/cs400380t
PG 10
WC Chemistry, Physical
SC Chemistry
GA 294BG
UT WOS:000330016800015
ER
PT J
AU Gao, F
Walter, ED
Washton, NM
Szanyi, J
Peden, CHF
AF Gao, Feng
Walter, Eric D.
Washton, Nancy M.
Szanyi, Janos
Peden, Charles H. F.
TI Synthesis and Evaluation of Cu-SAPO-34 Catalysts for Ammonia Selective
Catalytic Reduction. 1. Aqueous Solution Ion Exchange
SO ACS CATALYSIS
LA English
DT Article
DE selective catalytic reduction; chabazite; SAPO-34; Cu-SAPO-34; diesel
engine; emission control; NOx
ID MOLECULAR-SIEVES; ZEOLITE CATALYSTS; NOX REDUCTION; ACTIVE-SITES;
SAPO-34; CU-SSZ-13; NH3; STABILITY; TEMPLATE; SCR
AB SAPO-34 molecular sieves are synthesized using various structure directing agents (SDAs). Cu-SAPO-34 catalysts are prepared via aqueous solution ion exchange (IE). Catalysts are characterized with surface area/pore volume measurements, temperature programmed reduction (TPR), electron paramagnetic resonance (EPR), and nuclear magnetic resonance (NMR) spectroscopies. Catalytic properties are examined using standard ammonia selective catalytic reduction (NH3-SCR) and ammonia oxidation reactions. During solution IE, different SAPO-34 samples undergo different extent of structural damage via irreversible hydrolysis. Si content within the samples (i.e., Al-O-Si bond density) and framework stress are key factors that affect irreversible hydrolysis. Even using very dilute Cu acetate solutions, it is not possible to generate Cu-SAPO-34 samples with only isolated Cu2+ ions. Small amounts of CuOx species always coexist with isolated Cu2+ ions. Highly active and selective Cu-SAPO-34 catalysts for NH3-SCR are readily generated using this synthesis protocol, even for SAPO-34 samples that degrade substantially during solution IE. High-temperature aging is found to improve the catalytic performance. This is likely due to reduction of intracrystalline mass-transfer limitations via formation of additional porosity in the highly defective SAPO-34 particles formed after 1E.
C1 [Gao, Feng] Pacific NW Natl Lab, Inst Integrated Catalysis & Chem, Richland, WA 99352 USA.
Pacific NW Natl Lab, Div Mat Sci, Richland, WA 99352 USA.
RP Gao, F (reprint author), Pacific NW Natl Lab, Inst Integrated Catalysis & Chem, POB 999, Richland, WA 99352 USA.
EM feng.gao@pnnl.gov; chuck.peden@pnnl.gov
RI Walter, Eric/P-9329-2016;
OI Peden, Charles/0000-0001-6754-9928
FU U.S. Department of Energy (DOE), Energy Efficiency and Renewable Energy,
Vehicle Technologies Office; U.S. DOE by Battelle Memorial Institute
[DE-ACO5-76RL01830]
FX The authors gratefully acknowledge the U.S. Department of Energy (DOE),
Energy Efficiency and Renewable Energy, Vehicle Technologies Office, for
the support of this work. The research described in this paper was
performed at the Environmental Molecular Sciences Laboratory (EMSL), a
national scientific user facility sponsored by the DOE's Office of
Biological and Environmental Research and located at Pacific Northwest
National Laboratory (PNNL). PNNL is operated for the U.S. DOE by
Battelle Memorial Institute under contract number DE-ACO5-76RL01830.
Discussions with Drs. A. Yeierets, K. Kamasamudram, J. H. Li, and J. Y.
Luo from Cummins, Inc. and H. Y. Chen and H. Hess from Johnson-Matthey
are greatly appreciated.
NR 52
TC 47
Z9 47
U1 16
U2 115
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 2155-5435
J9 ACS CATAL
JI ACS Catal.
PD SEP
PY 2013
VL 3
IS 9
BP 2083
EP 2093
DI 10.1021/cs4004672
PG 11
WC Chemistry, Physical
SC Chemistry
GA 294BG
UT WOS:000330016800022
ER
PT J
AU Kwak, JH
Kovarik, L
Szanyi, J
AF Kwak, Ja Hun
Kovarik, Libor
Szanyi, Janos
TI Heterogeneous Catalysis on Atomically Dispersed Supported Metals: CO2
Reduction on Multifunctional Pd Catalysts
SO ACS CATALYSIS
LA English
DT Article
DE CO2 reduction; product selectivity; bifunctionality; atomic metal
dispersion; supported Pd catalysts
ID CARBON NANOTUBES; METHANATION; HYDROGENATION; HYDROCARBONS; GAMMA-AL2O3;
OXIDATION; MECHANISM; KINETICS; CU/SIO2; SILVER
AB Because of their heterogeneous nature, supported metal catalysts always contain metal centers in a rather broad dispersion range, and the presence of even atomically dispersed metals has been reported on oxide supports. The role of the atomically dispersed metal centers in the overall catalytic performances of these supported metal catalysts, however, has not been addressed to date. In this study, temperature programmed reaction and scanning transmission electron microscopy experiments were applied to show the fundamentally different reactivity patterns exhibited by Pd metal in atomically dispersed and traditional 3D clusters in the demanding reaction of CO2 reduction. The requirement for two different catalyst functionalities in the reduction of CO2 with hydrogen on Pd/Al2O3 and Pd/MWCNT catalysts was also substantiated. The results obtained clearly show that the oxide support material, even when it is considered inert like Al2O3, can function as a critical, active component of complex catalyst systems.
C1 [Kwak, Ja Hun; Szanyi, Janos] Pacific NW Natl Lab, Inst Integrated Catalysis, Richland, WA 99352 USA.
[Kovarik, Libor] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Kwak, JH (reprint author), UNIST, Sch Nanobiosci & Chem Engn, Ulsan 689798, South Korea.
EM Kwak@pnnl.gov; janos.szanyi@pnnl.gov
RI Kwak, Ja Hun/J-4894-2014; Kovarik, Libor/L-7139-2016;
OI Kovarik, Libor/0000-0002-2418-6925
FU Laboratory Directed Research and Development (LDRD) project; Chemical
Imaging Initiative at the Pacific Northwest National Laboratory (PNNL)
FX The catalyst preparation and catalytic measurements were supported by a
Laboratory Directed Research and Development (LDRD) project, while the
TEM work was supported by the Chemical Imaging Initiative at the Pacific
Northwest National Laboratory (PNNL). PNNL is operated for the U.S.
Department of Energy by Battelle Memorial Institute.
NR 36
TC 43
Z9 44
U1 23
U2 165
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 2155-5435
J9 ACS CATAL
JI ACS Catal.
PD SEP
PY 2013
VL 3
IS 9
BP 2094
EP 2100
DI 10.1021/cs4001392
PG 7
WC Chemistry, Physical
SC Chemistry
GA 294BG
UT WOS:000330016800023
ER
PT J
AU Milovanovic, P
Zimmermann, EA
Hahn, M
Djonic, D
Puschel, K
Djuric, M
Amling, M
Busse, B
AF Milovanovic, Petar
Zimmermann, Elizabeth A.
Hahn, Michael
Djonic, Danijela
Pueschel, Klaus
Djuric, Marija
Amling, Michael
Busse, Bjoern
TI Osteocytic Canalicular Networks: Morphological Implications for Altered
Mechanosensitivity
SO ACS NANO
LA English
DT Article
DE biological materials; mechanical properties; hierarchical structures;
multiscale; lacuno-canalicular networks
ID HUMAN CORTICAL BONE; STRAIN AMPLIFICATION; PERICELLULAR MATRIX; LACUNAR
DENSITY; TISSUE STRAIN; FLUID-FLOW; AGE; MINERALIZATION; OSTEOPOROSIS;
WOMEN
AB Osteocytes are ramified bone cells distributed throughout the bone matrix within a network of micrometer-scale cavities (lacunae) and numerous nanometer-thick tunnels (canaliculi). The integrity of the canalicular network might influence bone quality and reflect its mechanosensory potential. In this study, we applied an acid etching technique to embedded bone specimens that allows 3D observation of the canalicular network across a 2D plane to quantitatively assess the canalicular connections in cortical bone specimens from young and aged individuals. Our results showed a nearly 30% reduction in the number of canaliculi per osteocyte lacuna in aged individuals (N.Ot.Ca/Ot.Lc: 15.92 +/- 1.5 in aged vs 22.10 +/- 2.82 in young; p < 0.001); moreover, canalicular number was found to be inversely related to the osteonal tissue age represented by Ca/P ratio (p < 0.001). We frequently observed the phenomenon that canaliculi of osteocytes located near the osteon's periphery did not end at the osteon's cement line boundary but penetrated through the cement line and spread into the surrounding bone matrix, thus establishing an "external rooting" or "connection", which might have significant relevance to bone quality. Our findings showed that not only does the aging process diminish the canalicular network within osteons, but it also significantly reduces the probability of external osteonal rooting and connections with the surrounding bone tissue. Deterioration in the canalicular network with age reduces the connectivity between osteocytes and between osteons/interstitial tissue, which affects the supply of nutrients to osteocytes, degrades their mechanosensitivity, and contributes to increased bone fragility in the elderly.
C1 [Milovanovic, Petar; Zimmermann, Elizabeth A.; Hahn, Michael; Amling, Michael; Busse, Bjoern] Univ Med Ctr Hamburg Eppendorf, Dept Osteol & Biomech, D-22529 Hamburg, Germany.
[Milovanovic, Petar; Djonic, Danijela; Djuric, Marija] Univ Belgrade, Sch Med, Inst Anat, Lab Anthropol, Belgrade 11000, Serbia.
[Zimmermann, Elizabeth A.; Busse, Bjoern] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Pueschel, Klaus] Univ Med Ctr Hamburg Eppendorf, Dept Forens Med, D-22529 Hamburg, Germany.
RP Busse, B (reprint author), Univ Med Ctr Hamburg Eppendorf, Dept Osteol & Biomech, Lottestr 59, D-22529 Hamburg, Germany.
EM b.busse@uke.uni-hamburg.de
RI Zimmermann, Elizabeth/A-4010-2015; Busse, Bjorn/O-8462-2016;
OI Busse, Bjorn/0000-0002-3099-8073; Zimmermann,
Elizabeth/0000-0001-9927-3372
FU DAAD (Deutscher Akademischer Austauschdienst, German Academic Exchange
Service) [A/11/83161]; Ministry of Science and Education of the Republic
of Serbia [III 45005]; South-Eastern-European Cooperation of the
University Medical Center Hamburg-Eppendorf; Federal Ministry of
Education and Research [01EC1006F/01EC1005D]; DFG-Emmy Noether Program
(Deutsche Forschungsgemeinschaft, German Research Foundation) [BU
2562/2-1]
FX The study was supported by the DAAD (Deutscher Akademischer
Austauschdienst, German Academic Exchange Service; A/11/83161), the
Ministry of Science and Education of the Republic of Serbia (III 45005),
the South-Eastern-European Cooperation of the University Medical Center
Hamburg-Eppendorf, the Federal Ministry of Education and Research
(01EC1006F/01EC1005D) and the DFG-Emmy Noether Program (Deutsche
Forschungsgemeinschaft, German Research Foundation; BU 2562/2-1). The
authors thank C. Riedel for technical assistance with the electron
microscopy. The authors would also like to acknowledge the support of R.
O. Ritchie and A. Tomsia at Lawrence Berkeley National Lab.
NR 43
TC 25
Z9 25
U1 1
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
EI 1936-086X
J9 ACS NANO
JI ACS Nano
PD SEP
PY 2013
VL 7
IS 9
BP 7542
EP 7551
DI 10.1021/nn401360u
PG 10
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 294BH
UT WOS:000330016900013
PM 23909715
ER
PT J
AU Gamalski, AD
Perea, DE
Yoo, J
Li, N
Olszta, MJ
Colby, R
Schreiber, DK
Ducati, C
Picraux, ST
Hofmann, S
AF Gamalski, Andrew D.
Perea, Daniel E.
Yoo, Jinkyoung
Li, Nan
Olszta, Matthew J.
Colby, Robert
Schreiber, Daniel K.
Ducati, Caterina
Picraux, S. Tom
Hofmann, Stephan
TI Catalyst Composition and Impurity-Dependent Kinetics of Nanowire
Heteroepitaxy
SO ACS NANO
LA English
DT Article
DE nanowire; Ge-Si heteroepitaxy; nucleation barrier; environmental
transmission electron microscopy; AuGa catalyst alloy; dopants
ID SI/SIGE SUPERLATTICE NANOWIRES; HETEROSTRUCTURE NANOWIRES; SILICON
NANOWIRES; GROWTH; HETEROJUNCTIONS; MORPHOLOGY; SI; ABRUPTNESS;
INTERFACE; DIODES
AB The mechanisms and kinetics of axial Ge-Si nanowire heteroepitaxial growth based on the tailoring of the Au catalyst composition via Ga alloying are studied by environmental transmission electron microscopy combined with systematic ex situ ND calibrations. The morphology of the Ge Si heterojunction, in particular, the extent of a local, asymmetric Increase in nanowire diameter, is found to depend on the Ga composition of the catalyst, on the TMGa precursor exposure temperature, and on the presence of dopants. To rationalize the findings, a general nucleation-based model for nanowire heteroepitaxy is established which is anticipated to be relevant to a wide range of material systems and device-enabling heterostructures.
C1 [Gamalski, Andrew D.; Hofmann, Stephan] Univ Cambridge, Dept Engn, Cambridge CB3 0FA, England.
[Perea, Daniel E.; Colby, Robert] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
[Yoo, Jinkyoung; Li, Nan; Picraux, S. Tom] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
[Olszta, Matthew J.; Schreiber, Daniel K.] Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA.
[Ducati, Caterina] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England.
RP Perea, DE (reprint author), Pacific NW Natl Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA.
EM daniel.perea@pnnl.gov; sh315@cam.ac.uk
RI Hofmann, Stephan/D-3906-2012; Perea, Daniel/A-5345-2010; Li, Nan
/F-8459-2010;
OI Hofmann, Stephan/0000-0001-6375-1459; Li, Nan /0000-0002-8248-9027;
Ducati, Caterina/0000-0003-3366-6442
FU ERC [279342]; Marshall Aid Commemoration Commission; National Science
Foundation; Royal Society; Department of Energy's (DOE) Office of
Biological and Environmental Research [DE-AC05-76RL01830]; National
Nuclear Security Administration of the U.S. DOE [DE-AC52-06NA25396]
FX S.H. acknowledges funding from ERC grant InsituNANO (No. 279342). A.D.G.
acknowledges funding from the Marshall Aid Commemoration Commission and
the National Science Foundation. C.D. acknowledges funding from the
Royal Society. A portion of the research was also performed using EMSL,
a national scientific user facility sponsored by the Department of
Energy's (DOE) Office of Biological and Environmental Research and
located at Pacific Northwest National Laboratory (PNNL). PNNL is
operated by Battelle for the U.S. DOE under Contract DE-AC05-76RL01830.
We gratefully acknowledge the use of facilities within the LeRoy Eyring
Center for Solid State Science at Arizona State University. This work
was performed in part at CINT, a U.S. DOE, Office of Science User
Facility. The research was funded in part by the Laboratory Directed
Research and Development Program at LANL, an affirmative action equal
opportunity employer operated by Los Alamos National Security, LLC, for
the National Nuclear Security Administration of the U.S. DOE under
Contract DE-AC52-06NA25396.
NR 35
TC 7
Z9 7
U1 0
U2 23
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
EI 1936-086X
J9 ACS NANO
JI ACS Nano
PD SEP
PY 2013
VL 7
IS 9
BP 7689
EP 7697
DI 10.1021/nn402208p
PG 9
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 294BH
UT WOS:000330016900029
PM 23915202
ER
PT J
AU Staude, I
Miroshnichenko, AE
Decker, M
Fofang, NT
Liu, S
Gonzales, E
Dominguez, J
Luk, TS
Neshev, DN
Brener, I
Kivshar, Y
AF Staude, Isabelle
Miroshnichenko, Andrey E.
Decker, Manuel
Fofang, Nche T.
Liu, Sheng
Gonzales, Edward
Dominguez, Jason
Luk, Ting Shan
Neshev, Dragomir N.
Brener, Igal
Kivshar, Yuri
TI Tailoring Directional Scattering through Magnetic and Electric
Resonances in Subwavelength Silicon Nanodisks
SO ACS NANO
LA English
DT Article
DE magnetic resonance; all-dielectric nanoantennas; nanodisks; directional
scattering; resonant scattering
ID FANO RESONANCE; PLASMONIC NANOCAVITIES; OPTICAL NANOANTENNAS;
METAMATERIALS; NANOPARTICLES; LIGHT; PARTICLES; EMISSION; ANTENNA
AB Interference of optically induced electric and magnetic modes in high-index all-dielectric nanoparticles offers unique opportunities for tailoring directional scattering and engineering the flow of light. In this article we demonstrate theoretically and experimentally that the interference of electric and magnetic optically induced modes in individual subwavelength silicon nano-disks can lead to the suppression of resonant bacicscattering and to enhanced resonant forward scattering of light. To this end we spectrally tune the nanodisk's fundamental electric and magnetic resonances with respect to each other by a variation of the nanodisk aspect ratio. This ability to tune two modes of different character within the same nanoparticle provides direct control over their interference, and, In consequence, allows for engineering the particle's resonant and off-resonant scattering patterns. Most importantly, measured and numerically calculated transmittance spectra reveal that backward scattering can be suppressed and forward scattering can be enhanced at resonance for the particular case of overlapping electric and magnetic resonances. Our experimental results are in good agreement with calculations based on the discrete dipole approach as well as finite-integral frequency-domain simulations. Furthermore, we show useful applications of silicon nanodisks with tailored resonances as optical nanoantennas with strong unidirectional emission from a dipole source.
C1 [Staude, Isabelle; Miroshnichenko, Andrey E.; Decker, Manuel; Neshev, Dragomir N.; Kivshar, Yuri] Australian Natl Univ, Res Sch Phys & Engn, Nonlinear Phys Ctr, Canberra, ACT 0200, Australia.
[Staude, Isabelle; Fofang, Nche T.; Liu, Sheng; Gonzales, Edward; Dominguez, Jason; Luk, Ting Shan; Brener, Igal] Sandia Natl Labs, Ctr Integrated Nanotechnol, Albuquerque, NM 87185 USA.
RP Staude, I (reprint author), Australian Natl Univ, Res Sch Phys & Engn, Nonlinear Phys Ctr, GPO Box 4, Canberra, ACT 0200, Australia.
EM ips124@physics.anu.edu.au
RI Liu, Sheng/P-6029-2014; Staude, Isabelle/N-4270-2015; Neshev,
Dragomir/A-3759-2008; Miroshnichenko, Andrey/C-2170-2016;
OI Liu, Sheng/0000-0003-0967-4514; Neshev, Dragomir/0000-0002-4508-8646;
Miroshnichenko, Andrey/0000-0001-9607-6621; Decker,
Manuel/0000-0002-9125-0851
FU Australian Research Council
FX This work was performed, in part, at the Center for Integrated
Nanotechnologies, an Office of Science User Facility operated for the
U.S. Department of Energy (DOE) Office of Science. Sandia National
Laboratories is a multiprogram laboratory managed and operated by Sandia
Corporation, a wholly owned subsidiary of Lockheed Martin Corporation,
for the U.S. Department of Energy's National Nuclear Security
Administration under contract DE-AC04-94AL85000. The authors also
acknowledge support from the Australian Research Council. We thank W.
Liu, A. Evlyukhin, and A. Kuznetsov for the useful discussions.
NR 46
TC 222
Z9 223
U1 18
U2 101
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
EI 1936-086X
J9 ACS NANO
JI ACS Nano
PD SEP
PY 2013
VL 7
IS 9
BP 7824
EP 7832
DI 10.1021/nn402736f
PG 9
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 294BH
UT WOS:000330016900042
PM 23952969
ER
PT J
AU Rahman, A
Sanyal, MK
AF Rahman, Atikur
Sanyal, Milan K.
TI Correlated Charge Carrier-like Photoresponse of Polymer Nanowires
SO ACS NANO
LA English
DT Article
DE photoresponse; polymer nanowire; correlated electrons
ID SOLAR-CELLS; ULTRAVIOLET DETECTORS; CONJUGATED POLYMERS; MAGNETIC-FIELD;
PHOTODETECTORS; GAIN; PHOTOCONDUCTIVITY; CONVERSION; EXCITONS; ENERGY
AB Size confinement at nanometer length scales gives rise to many new and tunable properties of organic materials that are absent in their bulk state. Here we report, the appearance of large photoconduction property of a conducting polymer when it forms nanowires. The photoresponse and the external photoconductive gain were found to be >10(5) % and >200%, respectively, even at low bias (<1 V) voltage. These nanowires show a resistance switching transition at low temperature above a threshold bias, and below this transition, the resistance changes by more than 3 orders of magnitude under illumination of light. The photoresponse increases superlinearly and the resistance switching threshold voltage decreases with increasing illumination intensity. These properties are absent in the bulk polymer, and the observed photoresponse is not bolometric or excitonic in nature, nor it can be explained by free carrier generation or Schottky barrier modulation, rather it is consistent with the photoexcitation of correlated charge carriers.
C1 [Rahman, Atikur; Sanyal, Milan K.] Saha Inst Nucl Phys, Surface Phys Div, Kolkata 700064, India.
RP Rahman, A (reprint author), Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
EM arahman@bnl.gov; milank.sanyal@saha.ac.in
RI sanyal, milan/J-2527-2015;
OI sanyal, milan/0000-0002-3847-8793; Rahman, Atikur/0000-0002-1275-7129
NR 32
TC 4
Z9 4
U1 6
U2 30
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
EI 1936-086X
J9 ACS NANO
JI ACS Nano
PD SEP
PY 2013
VL 7
IS 9
BP 7894
EP 7900
DI 10.1021/nn402917h
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 294BH
UT WOS:000330016900049
PM 23952915
ER
PT J
AU Clark, KW
Zhang, XG
Vlassiouk, IV
He, GW
Feenstra, RM
Li, AP
AF Clark, Kendal W.
Zhang, X. -G.
Vlassiouk, Ivan V.
He, Guowei
Feenstra, Randall M.
Li, An-Ping
TI Spatially Resolved Mapping of Electrical Conductivity across Individual
Domain (Grain) Boundaries in Graphene
SO ACS NANO
LA English
DT Article
DE graphene; electronic transport; grain boundary; defect; scanning
tunneling microscopy; potentiometry
ID CHEMICAL-VAPOR-DEPOSITION; SCANNING TUNNELING POTENTIOMETRY; ELECTRONIC
TRANSPORT; POLYCRYSTALLINE GRAPHENE; EPITAXIAL GRAPHENE; SPECTROSCOPY;
CONDUCTANCE; SUBSTRATE; DISORDER; GROWTH
AB All large-scale graphene films contain extended topological defects dividing graphene into domains or grains. Here, we spatially map electronic transport near specific domain and grain boundaries in both epitaxial graphene grown on SiC and CVD graphene on Cu subsequently transferred to a SiO2 substrate, with one-to-one correspondence to boundary structures. Boundaries coinciding with the substrate step on SiC exhibit a significant potential barrier for electron transport of epitaxial graphene due to the reduced charge transfer from the substrate near the step edge. Moreover, monolayer-bilayer boundaries exhibit a high resistance that can change depending on the height of substrate step coinciding at the boundary. In CVD graphene, the resistance of a grain boundary changes with the width of the disordered transition region between adjacent grains. A quantitative modeling of boundary resistance reveals the increased electron Fermi wave vector within the boundary region, possibly due to boundary induced charge density variation. Understanding how resistance change with domain (grain) boundary structure in graphene is a crucial first step for controlled engineering of defects in large-scale graphene films.
C1 [Clark, Kendal W.; Zhang, X. -G.; Li, An-Ping] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Vlassiouk, Ivan V.] Oak Ridge Natl Lab, Measurement Sci & Syst Engn Div, Oak Ridge, TN 37831 USA.
[He, Guowei; Feenstra, Randall M.] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA.
RP Li, AP (reprint author), Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
EM apli@ornl.gov
RI Li, An-Ping/B-3191-2012; Feenstra, Randall/P-2530-2014; Vlassiouk,
Ivan/F-9587-2010;
OI Li, An-Ping/0000-0003-4400-7493; Feenstra, Randall/0000-0001-7120-5685;
Vlassiouk, Ivan/0000-0002-5494-0386; He, Guowei/0000-0001-8653-2793
FU Office of Basic Energy Sciences, U.S. Department of Energy; National
Science Foundation
FX This research was conducted at the Center for Nanophase Materials
Sciences, which is sponsored at Oak Ridge National Laboratory by the
Office of Basic Energy Sciences, U.S. Department of Energy. The support
(G.H. and R.M.F.) from the National Science Foundation is also
acknowledged. We thank G. Gu for discussions and S. Jesse for assistance
with data processing of this work.
NR 47
TC 44
Z9 44
U1 7
U2 87
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
EI 1936-086X
J9 ACS NANO
JI ACS Nano
PD SEP
PY 2013
VL 7
IS 9
BP 7956
EP 7966
DI 10.1021/nn403056k
PG 11
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 294BH
UT WOS:000330016900055
PM 23952068
ER
PT J
AU Ciesielski, PN
Matthews, JF
Tucker, MP
Beckham, GT
Crowley, MF
Himmel, ME
Donohoe, BS
AF Ciesielski, Peter N.
Matthews, James F.
Tucker, Melvin P.
Beckham, Gregg T.
Crowley, Michael F.
Himmel, Michael E.
Donohoe, Bryon S.
TI 3D Electron Tomography of Pretreated Biomass Informs Atomic Modeling of
Cellulose Microfibrils
SO ACS NANO
LA English
DT Article
DE transmission electron tomography; biomass nanostructure; cellulose
microfibril; atomic modeling; biofuels; thermochemical pretreatment
ID PLANT-CELL WALLS; LIGNOCELLULOSIC BIOMASS; ENZYMATIC-HYDROLYSIS; FIBER;
SIMULATION; POLYMERIZATION; DIGESTIBILITY; RECALCITRANCE; ARCHITECTURE;
NANOSCALE
AB Fundamental insights into the macromolecular architecture of plant cell walls will elucidate new structure-property relationships and facilitate optimization of catalytic processes that produce fuels and chemicals from biomass. Here we introduce computational methodology to extract nanoscale geometry of cellulose microfibrils within thermochemically treated biomass directly from electron tomographic data sets. We quantitatively compare the cell wall nanostructure in corn stover following two leading pretreatment strategies: dilute acid with iron sulfate co-catalyst and ammonia fiber expansion (AFEX). Computational analysis of the tomographic data is used to extract mathematical descriptions for longitudinal axes of cellulose microfibrils from which we calculate their nanoscale curvature. These nanostructural measurements are used to inform the construction of atomistic models that exhibit features of cellulose within real, process-relevant biomass. By computational evaluation of these atomic models, we propose relationships between the crystal structure of cellulose 1 beta and the nanoscale geometry of cellulose microfibrils.
C1 [Ciesielski, Peter N.; Matthews, James F.; Crowley, Michael F.; Himmel, Michael E.; Donohoe, Bryon S.] Natl Renewable Energy Lab, Biosci Ctr, Golden, CO 80401 USA.
[Tucker, Melvin P.; Beckham, Gregg T.] Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO 80401 USA.
RP Ciesielski, PN (reprint author), Natl Renewable Energy Lab, Biosci Ctr, 15013 Denver West Pkwy, Golden, CO 80401 USA.
EM peter.ciesielski@nrel.gov; bryon.donohoe@nrel.gov
FU Center for Direct Catalytic Conversion of Biomass to Biofuels (C3Bio),
an Energy Frontier Research Center; U.S. Department of Energy, Office of
Science, Office of Basic Energy Sciences [DE-SC0000997]
FX This work was supported by the Center for Direct Catalytic Conversion of
Biomass to Biofuels (C3Bio), an Energy Frontier Research Center funded
by the U.S. Department of Energy, Office of Science, Office of Basic
Energy Sciences under Award Number DE-SC0000997. We would like to thank
Xiaowen Chen for assistance preparing the DA/FE pretreated samples and
Shishir Chundawat and Leonardo da Costa Sousa from MSU's Biomass
Conversion Research Laboratory for providing the AFEX pretreated
materials.
NR 48
TC 22
Z9 22
U1 2
U2 34
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
EI 1936-086X
J9 ACS NANO
JI ACS Nano
PD SEP
PY 2013
VL 7
IS 9
BP 8011
EP 8019
DI 10.1021/nn4031542
PG 9
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 294BH
UT WOS:000330016900061
PM 23988022
ER
PT J
AU Arruda, TM
Kumar, A
Jesse, S
Veith, GM
Tselev, A
Baddorf, AP
Balke, N
Kalinin, SV
AF Arruda, Thomas M.
Kumar, Amit
Jesse, Stephen
Veith, Gabriel M.
Tselev, Alexander
Baddorf, Arthur P.
Balke, Nina
Kalinin, Sergei V.
TI Toward Quantitative Electrochemical Measurements on the Nanoscale by
Scanning Probe Microscopy: Environmental and Current Spreading Effects
SO ACS NANO
LA English
DT Article
DE scanning probe microscopy; solid state electrolyte; counter electrode
effects; Li ion battery; nanoscale electrochemistry
ID ATOMIC-FORCE MICROSCOPY; SILICON SURFACES; LITHIUM; OXIDATION; FILMS
AB The application of electric bias across tip surface junctions in scanning probe microscopy can readily induce surface and bulk electrochemical processes that can be further detected though changes in surface topography, Faradaic or conductive currents, or electromechanical strain responses. However, the basic factors controlling tip-induced electrochemical processes, including the relationship between applied tip bias and the thermodynamics of local processes, remains largely unexplored. Using the model Li-ion reduction reaction on the surface in Li-ion conducting glass ceramic, we explore the factors controlling Li-metal formation and find surprisingly strong effects of atmosphere and back electrode composition on the process. We find that reaction processes are highly dependent on the nature of the counter electrode and environmental conditions. Using a nondepleting Li counter electrode, Li particles could grow significantly larger and faster than a depleting counter electrode. Significant Li ion depletion leads to the inability for further Li reduction. Time studies suggest that Li diffusion replenishes the vacant sites after similar to 12 h. These studies suggest the feasibility of SPM-based quantitative electrochemical studies under proper environmental controls, extending the concepts of ultramicroelectrodes to the single-digit nanometer scale.
C1 [Arruda, Thomas M.; Kumar, Amit; Jesse, Stephen; Tselev, Alexander; Baddorf, Arthur P.; Balke, Nina; Kalinin, Sergei V.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Veith, Gabriel M.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Kalinin, SV (reprint author), Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
EM Sergei2@ornl.gov
RI Kumar, Amit/C-9662-2012; Tselev, Alexander/L-8579-2015; Balke,
Nina/Q-2505-2015; Kalinin, Sergei/I-9096-2012; Jesse,
Stephen/D-3975-2016; Baddorf, Arthur/I-1308-2016
OI Kumar, Amit/0000-0002-1194-5531; Tselev, Alexander/0000-0002-0098-6696;
Balke, Nina/0000-0001-5865-5892; Kalinin, Sergei/0000-0001-5354-6152;
Jesse, Stephen/0000-0002-1168-8483; Baddorf, Arthur/0000-0001-7023-2382
FU Oak Ridge National Laboratory by the Scientific User Facilities
Division, Office of Basic Energy Sciences, U.S. Department of Energy
FX This research was conducted at the Center for Nanophase Materials
Sciences, which is sponsored at Oak Ridge National Laboratory by the
Scientific User Facilities Division, Office of Basic Energy Sciences,
U.S. Department of Energy. The authors gratefully acknowledge Roger De
Souza (RTW Aachen) for thought-provoking discussions that led to this
work and Nick Lavrick (CNMS) for eminently useful references on the role
of ionic dynamics on surface conductance on dielectrics.
NR 22
TC 5
Z9 5
U1 2
U2 56
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
EI 1936-086X
J9 ACS NANO
JI ACS Nano
PD SEP
PY 2013
VL 7
IS 9
BP 8175
EP 8182
DI 10.1021/nn4034772
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 294BH
UT WOS:000330016900079
PM 23968334
ER
PT J
AU Shin, N
Chi, MF
Filler, MA
AF Shin, Naechul
Chi, Miaofang
Filler, Michael A.
TI Sidewall Morphology-Dependent Formation of Multiple Twins in Si
Nanowires
SO ACS NANO
LA English
DT Article
DE silicon; nanowire; defects; twin; surface; facet
ID III-V NANOWIRES; SILICON NANOWIRES; TWINNING SUPERLATTICES; PHOSPHIDE
NANOWIRES; DEFECT FORMATION; GROWTH
AB Precise placement of twin boundaries and stacking faults promises new opportunities to fundamentally manipulate the optical, electrical, and thermal properties of semiconductor nanowires. Here we report on the appearance of consecutive twin boundaries in Si nanowires and show that sidewall morphology governs their spacing. Detailed electron microscopy analysis reveals that thin {111} sidewall facets, which elongate following the first twin boundary (TB1), are responsible for deforming the triple-phase line and favoring the formation of the second twin boundary (TB2). While multiple, geometrically correlated defect planes are known in group III-V nanowires, our findings show that this behavior is also possible in group IV materials.
C1 [Shin, Naechul; Filler, Michael A.] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA.
[Chi, Miaofang] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Filler, MA (reprint author), Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA.
EM michael.filler@chbe.gatech.edu
RI Chi, Miaofang/Q-2489-2015
OI Chi, Miaofang/0000-0003-0764-1567
FU National Science Foundation (CBET) [1133563]; ORNL's Shared Research
Equipment (ShaRE) User Program; Office of Basic Energy Sciences, the
U.S. Department of Energy
FX The authors acknowledge funding from the National Science Foundation
(CBET# 1133563) and greatly appreciate insightful comments from Karren
More. Research supported by ORNL's Shared Research Equipment (ShaRE)
User Program, which is sponsored by the Office of Basic Energy Sciences,
the U.S. Department of Energy.
NR 28
TC 4
Z9 4
U1 2
U2 25
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
EI 1936-086X
J9 ACS NANO
JI ACS Nano
PD SEP
PY 2013
VL 7
IS 9
BP 8206
EP 8213
DI 10.1021/nn4036798
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 294BH
UT WOS:000330016900083
PM 23944902
ER
PT J
AU Zhang, YJ
Ziegler, D
Salmeron, M
AF Zhang, Yingjie
Ziegler, Dominik
Salmeron, Miquel
TI Charge Trapping States at the SiO2-Oligothiophene Monolayer Interface in
Field Effect Transistors Studied by Kelvin Probe Force Microscopy
SO ACS NANO
LA English
DT Article
DE charge trapping; oligothiophene monolayer; field effect transistor;
Kelvin probe force microscopy; density of states
ID THIN-FILM TRANSISTORS; TRANSPORT; BEHAVIOR; PERFORMANCE; CELLS
AB Using Kelvin probe force microscopy (KPFM) we studied the local charge trapping states at the SiO2-oligothiophene Interface in a field effect transistor (FET), where SiO2 is the gate dielectric. KPFM reveals surface potential inhomogeneities within the oligothiophene monolayer, which correlate with its structure. A large peak of trap states with energies in the oligothiophene's band gap due to hydroxyl groups is present at the oxide surface. We show that these states are successfully eliminated by preadsorption of a layer of (3-aminopropyl)triethoxysilane (APTES). Time-resolved surface potential transient measurements further show that the charge carrier injection in the nonpassivated FET contains two exponential transients, due to the charge trapping on the oxide surface and in the bulk oxide, while the APTES-passivated FET has only a single-exponential transient due to the bulk oxide. The results demonstrate that APTES is a good SiO2 surface passivation layer to reduce trap states while maintaining a hydrophilic surface, pointing out the importance of dielectric surface passivation to bridge the gap between soft materials and electronic devices.
C1 [Zhang, Yingjie; Salmeron, Miquel] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
[Zhang, Yingjie] Univ Calif Berkeley, Appl Sci & Technol Grad Program, Berkeley, CA 94720 USA.
[Ziegler, Dominik] Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA USA.
[Salmeron, Miquel] Univ Calif Berkeley, Mat Sci & Engn Dept, Berkeley, CA 94720 USA.
RP Salmeron, M (reprint author), Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
EM MBSalmeron@lbl.gov
RI Foundry, Molecular/G-9968-2014
FU Berkeley Lab's program on "Self-Assembly of Organic/Inorganic
Nanocomposite Materials"; Office of Science, Office of Basic Energy
Sciences (BES), Materials Sciences and Engineering (MSE) Division of the
U.S. Department of Energy (DOE) [DE-AC02-05CH11231]; Office of Science
of the U.S. Department of Energy
FX We thank Andrew Pun and Dr. Yi Liu for help with APTES deposition and
discussions on surface trap states passivation. We also thank Prof.
Jaime Colchero for helping to set up the KPFM. This work was supported
by Berkeley Lab's program on "Self-Assembly of Organic/Inorganic
Nanocomposite Materials", funded by the Office of Science, Office of
Basic Energy Sciences (BES), Materials Sciences and Engineering (MSE)
Division of the U.S. Department of Energy (DOE), under Contract No.
DE-AC02-05CH11231. It used resources of the Molecular Foundry, which are
supported by the Office of Science of the U.S. Department of Energy.
NR 36
TC 15
Z9 15
U1 5
U2 63
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
EI 1936-086X
J9 ACS NANO
JI ACS Nano
PD SEP
PY 2013
VL 7
IS 9
BP 8258
EP 8265
DI 10.1021/nn403750h
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 294BH
UT WOS:000330016900089
PM 23987138
ER
PT J
AU Kim, Y
Kelly, SJ
Morozovska, A
Rahani, EK
Strelcov, E
Eliseev, E
Jesse, S
Biegalski, MD
Balke, N
Benedek, N
Strukov, D
Aarts, J
Hwang, I
Oh, S
Choi, JS
Choi, T
Park, BH
Shenoy, VB
Maksymovych, P
Kalinin, SV
AF Kim, Yunseok
Kelly, Simon J.
Morozovska, Anna
Rahani, Ehsan Kabiri
Strelcov, Evgheni
Eliseev, Eugene
Jesse, Stephen
Biegalski, Michael D.
Balke, Nina
Benedek, Nicole
Strukov, Dmitri
Aarts, J.
Hwang, Inrok
Oh, Sungtaek
Choi, Jin Sik
Choi, Taekjib
Park, Bae Ho
Shenoy, Vivek B.
Maksymovych, Peter
Kalinin, Sergei V.
TI Mechanical Control of Electroresistive Switching
SO NANO LETTERS
LA English
DT Article
DE Piezochemical effect; pressure; mechanical force; metal-insulator
transition; AFM
ID PROBE FORCE MICROSCOPY; LATTICE-PARAMETER; OXIDE INTERFACES; NIO;
EXCHANGE; TRIBOELECTRICITY; SEMICONDUCTORS; POLARIZATION; TRANSITIONS;
MANGANITES
AB Hysteretic metal-insulator transitions (MIT) mediated by ionic dynamics or ferroic phase transitions underpin emergent applications for nonvolatile memories and logic devices. The vast majority of applications and studies have explored the MIT coupled to the electric field or temperarture. Here, we argue that MIT coupled to ionic dynamics should be controlled by mechanical stimuli, the behavior we refer to as the piezochemical effect. We verify this effect experimentally and demonstrate that it allows both studying materials physics and enabling novel data storage technologies with mechanical writing and current-based readout.
C1 [Kim, Yunseok; Kelly, Simon J.; Strelcov, Evgheni; Jesse, Stephen; Biegalski, Michael D.; Balke, Nina; Maksymovych, Peter; Kalinin, Sergei V.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Kim, Yunseok] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 440746, South Korea.
[Kelly, Simon J.; Aarts, J.] Leiden Univ, Leiden Inst Phys, NL-2333 CA Leiden, Netherlands.
[Morozovska, Anna] Natl Acad Sci Ukraine, Inst Phys, UA-03028 Kiev, Ukraine.
[Rahani, Ehsan Kabiri] Brown Univ, Sch Engn, Providence, RI 02906 USA.
[Eliseev, Eugene] Natl Acad Sci Ukraine, Inst Problems Mat Sci, UA-03142 Kiev, Ukraine.
[Benedek, Nicole] Univ Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA.
[Strukov, Dmitri] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA.
[Hwang, Inrok; Oh, Sungtaek; Choi, Jin Sik; Park, Bae Ho] Konkuk Univ, Dept Phys, Div Quantum Phases & Devices, Seoul 143701, South Korea.
[Choi, Taekjib] Sejong Univ, Hybrid Mat Res Ctr, Seoul 143747, South Korea.
[Choi, Taekjib] Sejong Univ, Dept Nanotechnol & Adv Mat Engn, Seoul 143747, South Korea.
[Shenoy, Vivek B.] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA.
RP Kim, Y (reprint author), Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
EM yunseokkim@skku.edu; sergei2@ornl.gov
RI Strelcov, Evgheni/H-1654-2013; Choi, Taekjib/H-8791-2012; Balke,
Nina/Q-2505-2015; Kalinin, Sergei/I-9096-2012; Maksymovych,
Petro/C-3922-2016; Jesse, Stephen/D-3975-2016
OI Choi, Taekjib/0000-0001-6912-3322; Balke, Nina/0000-0001-5865-5892;
Kalinin, Sergei/0000-0001-5354-6152; Maksymovych,
Petro/0000-0003-0822-8459; Jesse, Stephen/0000-0002-1168-8483
FU U.S. Department of Energy, Basic Energy Sciences, Materials Sciences and
Engineering Division; Scientific User Facilities Division, Office of
Basic Energy Sciences, U.S. Department of Energy; National Research
Foundation of Korea (NRF); Korea government (MSIP) [2013R1A3A2042120];
Basic Science Research Program through the NRF; Korea MEST
[2011-0025607]; Dutch Ministry of Economic Affairs; Army Research Office
[W911NF-11-1-0171]
FX Research was supported (S.V.K., Y.K., P.M.). by the U.S. Department of
Energy, Basic Energy Sciences, Materials Sciences and Engineering
Division. A portion of this research was conducted as user project at
the Center for Nanophase Materials Sciences (support for S.J., M.D.B.,
N.B.), which is sponsored at Oak Ridge National Laboratory by the
Scientific User Facilities Division, Office of Basic Energy Sciences,
U.S. Department of Energy. This work was also supported by (I.H., S.O.,
J.S.C., B.H.P.) the National Research Foundation of Korea (NRF) grants
funded by the Korea government (MSIP) (No. 2013R1A3A2042120), (T.C.)
Basic Science Research Program through the NRF funded by the Korea MEST
(Grant No. 2011-0025607), and (S.J.K., J.A.) NanoNed, a national
nanotechnology program coordinated by the Dutch Ministry of Economic
Affairs. V.B.S. gratefully acknowledges the support of the Army Research
Office through Contract W911NF-11-1-0171.
NR 61
TC 20
Z9 20
U1 7
U2 73
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
EI 1530-6992
J9 NANO LETT
JI Nano Lett.
PD SEP
PY 2013
VL 13
IS 9
BP 4068
EP 4074
DI 10.1021/nl401411r
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 296BA
UT WOS:000330158900016
PM 23981113
ER
PT J
AU Lei, Y
Lu, J
Luo, XY
Wu, TP
Du, P
Zhang, XY
Ren, Y
Wen, JG
Miller, DJ
Miller, JT
Sun, YK
Elam, JW
Amine, K
AF Lei, Yu
Lu, Jun
Luo, Xiangyi
Wu, Tianpin
Du, Peng
Zhang, Xiaoyi
Ren, Yang
Wen, Jianguo
Miller, Dean J.
Miller, Jeffrey T.
Sun, Yang-Kook
Elam, Jeffrey W.
Amine, Khalil
TI Synthesis of Porous Carbon Supported Palladium Nanoparticle Catalysts by
Atomic Layer Deposition: Application for Rechargeable Lithium-O-2
Battery
SO NANO LETTERS
LA English
DT Article
DE Li-O-2 battery; atomic layer deposition; palladium nanoparticles; oxygen
reduction reaction; oxygen evolution reaction
ID LI-AIR BATTERIES; LI-O-2 BATTERIES; OXYGEN BATTERY; ELECTROLYTES;
ELECTROCHEMISTRY; ELECTRODES; DISCHARGE; CHEMISTRY; NANOPORES; PLATINUM
AB In this study, atomic layer deposition (ALD) was used to deposit nanostructured palladium on porous carbon as the cathode material for Li-O-2 cells. Scanning transmission electron microscopy showed discrete crystalline nanoparticles decorating the surface of the porous carbon support, where the size could be controlled in the range of 2-8 nm and depended on the number of Pd ALD cycles performed. X-ray absorption spectroscopy at the Pd K-edge revealed that the carbon supported Pd existed in a mixed phase of metallic palladium and palladium oxide. The conformality of ALD allowed us to uniformly disperse the Pd catalyst onto the carbon support while preserving the initial porous structure. As a result, the charging and discharging performance of the oxygen cathode in a Li-O-2 cell was improved. Our results suggest that ALD is a promising technique for tailoring the surface composition and structure of nanoporous supports in energy storage devices.
C1 [Lei, Yu; Elam, Jeffrey W.] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA.
[Lu, Jun; Luo, Xiangyi; Du, Peng; Miller, Jeffrey T.; Amine, Khalil] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
[Wu, Tianpin; Zhang, Xiaoyi; Ren, Yang] Argonne Natl Lab, Adv Photon Sources, Xray Sci Div, Argonne, IL 60439 USA.
[Luo, Xiangyi] Univ Utah, Dept Met Engn, Salt Lake City, UT 84112 USA.
[Wen, Jianguo; Miller, Dean J.] Argonne Natl Lab, Electron Microscopy Ctr, Argonne, IL 60439 USA.
[Sun, Yang-Kook] Hanyang Univ, Dept Energy Engn, Seoul 133791, South Korea.
[Amine, Khalil] King Abdulaziz Univ, Dept Chem, Fac Sci, Jeddah 80203, Saudi Arabia.
RP Elam, JW (reprint author), Argonne Natl Lab, Div Energy Syst, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM jelam@anl.gov; amine@anl.gov
RI Amine, Khalil/K-9344-2013; Du, Peng/F-8336-2013; Luo,
Xiangyi/N-4709-2014; Luo, Xiangyi/K-6058-2015;
OI Luo, Xiangyi/0000-0002-4817-1461; Luo, Xiangyi/0000-0002-4817-1461; Lei,
Yu/0000-0002-4161-5568
FU U.S. Department of Energy; FreedomCAR; Vehicle Technologies Office;
Institute for Atom-efficient Chemical Transformations (IACT); Energy
Frontier Research Center; U.S. Department of Energy, Office of Science,
Office of Basic Energy Sciences; Center for Electrical Energy;
Department of Energy (DOE) Office of Energy Efficiency and Renewable
Energy (EERE); Human Resources Development of the Korea Institute of
Energy Technology Evaluation and Planning (KETEP); Korean government,
Ministry of Knowledge and Economy [20114010203150]; National Research
Foundation of Korea (NRF); Korea government (MEST) [2009-0092780]; U.S.
Department of Energy, Office of Science, Office of Basic Energy Sciences
[DE-ACO2-06CH11357]; Department of Energy [DE-ACO206CH11357]; MRCAT
FX Research at Argonne National Laboratory was funded by U.S. Department of
Energy, FreedomCAR and Vehicle Technologies Office. Y.L. was supported
as part of the Institute for Atom-efficient Chemical Transformations
(IACT), an Energy Frontier Research Center funded by the U.S. Department
of Energy, Office of Science, Office of Basic Energy Sciences. J.W.E.
was supported by the Center for Electrical Energy Storage: Tailored
Interfaces, an Energy Frontier Research Center funded by the U.S.
Department of Energy, Office of Science, Office of Basic Energy
Sciences. J.L. was supported by the Department of Energy (DOE) Office of
Energy Efficiency and Renewable Energy (EERE) Postdoctoral Research
Award under the EERE Vehicles Technology Program. This work was also
supported by the Human Resources Development of the Korea Institute of
Energy Technology Evaluation and Planning (KETEP) grant funded by the
Korean government, Ministry of Knowledge and Economy (No.
20114010203150), and by the National Research Foundation of Korea (NRF)
grant funded by the Korea government (MEST) (No. 2009-0092780). Use of
the Advanced Photon Source and research carried out in the Electron
Microscopy Center at Argonne National Laboratory was supported by the
U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences, under Contract No. DE-ACO2-06CH11357. MRCAT operations are
supported by the Department of Energy under Contract No.
DE-ACO206CH11357 and the MRCAT member institutions.
NR 57
TC 78
Z9 78
U1 31
U2 249
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
EI 1530-6992
J9 NANO LETT
JI Nano Lett.
PD SEP
PY 2013
VL 13
IS 9
BP 4182
EP 4189
DI 10.1021/nl401833p
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 296BA
UT WOS:000330158900035
PM 23927754
ER
PT J
AU Riley, JR
Padalkar, S
Li, QM
Lu, P
Koleske, DD
Wierer, JJ
Wang, GT
Lauhon, LJ
AF Riley, James R.
Padalkar, Sonal
Li, Qiming
Lu, Ping
Koleske, Daniel D.
Wierer, Jonathan J.
Wang, George T.
Lauhon, Lincoln J.
TI Three-Dimensional Mapping of Quantum Wells in a GaN/InGaN Core-Shell
Nanowire Light-Emitting Diode Array
SO NANO LETTERS
LA English
DT Article
DE LED; atom probe tomography; semiconductor; nanowire; GaN; quantum well
ID ATOM-PROBE TOMOGRAPHY; MG-DOPED GAN; LASER-DIODES; EVAPORATION BEHAVIOR;
SPECIMEN PREPARATION; PYRAMIDAL DEFECTS; HETEROSTRUCTURES; MICROSCOPY;
LAYERS; FILMS
AB Correlated atom probe tomography, cross-sectional scanning transmission electron microscopy, and cathodoluminescence spectroscopy are used to analyze InGaN/GaN multiquantum wells (QWs) in nanowire array light-emitting diodes (LEDs). Tomographic analysis of the In distribution, interface morphology, and dopant clustering reveals material quality comparable to that of planar LED QWs. The position-dependent CL emission wavelength of the nonpolar side-facet QWs and semipolar top QWs is correlated with In composition.
C1 [Riley, James R.; Padalkar, Sonal; Lauhon, Lincoln J.] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
[Li, Qiming; Lu, Ping; Koleske, Daniel D.; Wierer, Jonathan J.; Wang, George T.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Lauhon, LJ (reprint author), Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
EM lauhon@northwestern.edu
RI Lauhon, Lincoln/B-7526-2009; Lauhon, Lincoln/H-2976-2015; Wierer,
Jonathan/G-1594-2013
OI Lauhon, Lincoln/0000-0001-6046-3304; Wierer,
Jonathan/0000-0001-6971-4835
FU Energy Frontier Research Center on Solid State Lighting Science; U.S.
DOE Office of Basic Energy Sciences; National Defensive Science and
Engineering Graduate Fellowship program; NSF-MRI [DMR-0420532];
ONR-DURIP [N00014-0400798, N00014-0610539, N00014-0910781]; Initiative
for Sustainability and Energy at Northwestern (ISEN); National Science
Foundation's MRSEC program [DMR-1121262]; U.S. Department of Energy's
National Nuclear Security Administration [DE-AC04-94AL85000]
FX Research was supported by the Energy Frontier Research Center on Solid
State Lighting Science, which is funded by the U.S. DOE Office of Basic
Energy Sciences. J.R.R acknowledges partial support by the National
Defensive Science and Engineering Graduate Fellowship program.
Atom-probe tomography was performed at the Northwestern University
Center for Atom-Probe Tomography (NUCAPT) whose local-electrode
atom-probe (LEAP) tomograph was purchased and upgraded with funding from
NSF-MRI (DMR-0420532) and ONR-DURIP (N00014-0400798, N00014-0610539,
N00014-0910781) grants. Instrumentation at NUCAPT was supported by the
Initiative for Sustainability and Energy at Northwestern (ISEN). NUCAPT
is a Shared Facility at the Materials Research Center of Northwestern
University, supported by the National Science Foundation's MRSEC program
(DMR-1121262). Sandia National Laboratories is a multiprogram laboratory
managed and operated by Sandia Corporation, a wholly owned subsidiary of
Lockheed Martin Corporation, for the U.S. Department of Energy's
National Nuclear Security Administration under contract
DE-AC04-94AL85000.
NR 70
TC 49
Z9 49
U1 3
U2 122
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
EI 1530-6992
J9 NANO LETT
JI Nano Lett.
PD SEP
PY 2013
VL 13
IS 9
BP 4317
EP 4325
DI 10.1021/nl4021045
PG 9
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 296BA
UT WOS:000330158900056
PM 23919559
ER
PT J
AU Shi, FF
Baker, LR
Hervier, A
Somorjai, GA
Komvopoulos, K
AF Shi, Feifei
Baker, L. Robert
Hervier, Antoine
Somorjai, Gabor A.
Komvopoulos, Kyriakos
TI Tuning the Electronic Structure of Titanium Oxide Support to Enhance the
Electrochemical Activity of Platinum Nanoparticles
SO NANO LETTERS
LA English
DT Article
DE Electronic structure; electrochemical activity; platinum nanoparticles;
strong metal support interaction; titanium oxide
ID HIGH-SURFACE-AREA; PARTICLE-SIZE; METHANOL ELECTROOXIDATION; OXYGEN
REDUCTION; FUEL-CELLS; ELECTROCATALYSTS; STABILITY; CATALYST; TIO2;
NANOTUBES
AB Two times higher activity and three times higher stability in methanol oxidation reaction, a 0.12 V negative shift of the CO oxidation peak potential, and a 0.07 V positive shift of the oxygen reaction potential compared to Pt nanoparticles on pristine TiO2 support were achieved by tuning the electronic structure of the titanium oxide support of Pt nanoparticle catalysts. This was accomplished by adding oxygen vacancies or doping with fluorine. Experimental trends are interpreted in the context of an electronic structure model, showing an improvement in electrochemical activity when the Fermi level of the support material in Pt/TiOx systems is close to the Pt Fermi level and the redox potential of the reaction. The present approach provides guidance for the selection of the support material of Pt/TiOx systems and may be applied to other metal-oxide support materials, thus having direct implications in the design and optimization of fuel cell catalyst supports.
C1 [Shi, Feifei; Komvopoulos, Kyriakos] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA.
[Baker, L. Robert; Hervier, Antoine; Somorjai, Gabor A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Shi, Feifei; Baker, L. Robert; Hervier, Antoine; Somorjai, Gabor A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM somorjai@berkeley.edu; kyriakos@me.berkeley.edu
RI Foundry, Molecular/G-9968-2014
FU UCB-KAUST Academic Excellence Alliance (AEA) Program
FX The authors thank Dr. Philip N. Ross, Jr., for helpful discussions on
elertocatalysis, Zhongwei Zhu for assistance in XPS spectra acquisition,
and Yimin Li and Hailiang Wang for fruitful discussions. TiOx
film deposition was carried out at the Marvell Nano Lab, University of
California, Berkeley (UCB). SEM and XPS studies were carried out at the
Molecular Foundry, Lawrence Berkeley National Laboratory. This research
was supported by the UCB-KAUST Academic Excellence Alliance (AEA)
Program.
NR 35
TC 28
Z9 28
U1 8
U2 98
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
EI 1530-6992
J9 NANO LETT
JI Nano Lett.
PD SEP
PY 2013
VL 13
IS 9
BP 4469
EP 4474
DI 10.1021/nl402392u
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 296BA
UT WOS:000330158900080
PM 23924204
ER
PT J
AU Wang, ZG
Gu, M
Zhou, YG
Zu, XT
Connell, JG
Xiao, J
Perea, D
Lauhon, LJ
Bang, J
Zhang, SB
Wang, CM
Gao, F
AF Wang, Zhiguo
Gu, Meng
Zhou, Yungang
Zu, Xiaotao
Connell, Justin G.
Xiao, Jie
Perea, Daniel
Lauhon, Lincoln J.
Bang, Junhyeok
Zhang, Shengbai
Wang, Chongmin
Gao, Fei
TI Electron-Rich Driven Electrochemical Solid-State Amorphization in Li-Si
Alloys
SO NANO LETTERS
LA English
DT Article
DE Li-Si alloys; electrochemical solid-state amorphization; ab initio
molecular dynamics simulations; in situ TEM; electron rich
ID LITHIUM-ION BATTERIES; AB-INITIO; STRUCTURAL EVOLUTION; SILICON
ELECTRODES; LITHIATION; MICROSCOPY; NANOWIRES; 1ST-PRINCIPLES;
INSERTION; BEHAVIOR
AB The physical and chemical behaviors of materials used in energy storage devices, such as lithium-ion batteries (LIBs), are mainly controlled by an electrochemical process, which normally involves insertion/extraction of ions into/from a host lattice with a concurrent flow of electrons to compensate charge balance. The fundamental physics and chemistry governing the behavior of materials in response to the ions insertion/extraction is not known. Herein, a combination of in situ lithiation experiments and large-scale ab initio molecular dynamics simulations are performed to explore the mechanisms of the electrochemically driven solid-state amorphization in Li-Si systems. We find that local electron-rich condition governs the electrochemically driven solid-state amorphization of Li-Si alloys. This discovery provides the fundamental explanation of why lithium insertion in semiconductor and insulators leads to amorphization, whereas in metals, it leads to a crystalline alloy. The present work correlates electrochemically driven reactions with ion insertion, electron transfer, lattice stability, and phase equilibrium.
C1 [Wang, Zhiguo; Zu, Xiaotao] Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China.
[Wang, Zhiguo; Gu, Meng; Zhou, Yungang; Xiao, Jie; Perea, Daniel; Wang, Chongmin; Gao, Fei] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Connell, Justin G.; Lauhon, Lincoln J.] Northwestern Univ, Evanston, IL 60208 USA.
[Bang, Junhyeok; Zhang, Shengbai] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA.
RP Wang, ZG (reprint author), Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China.
EM zgwang@uestc.edu.cn; chongmin.wang@pnnl.gov; fei.gao@pnnl.gov
RI Perea, Daniel/A-5345-2010; Wang, Zhiguo/B-7132-2009; Lauhon,
Lincoln/B-7526-2009; Lauhon, Lincoln/H-2976-2015; Gu, Meng/B-8258-2013
OI Lauhon, Lincoln/0000-0001-6046-3304;
FU DOE's Office of Biological and Environmental Research; DOE
[DE-AC05-76RLO1830, DE-SC0002623]; Los Alamos National Laboratory
[DE-AC52-06NA25396]; Northwestern University [NSF DMR-1006069]; NSF
[DMR-1006069]
FX The work described in this paper is part of the Chemical Imaging
Initiative at Pacific Northwest National Laboratory (PNNL). It was
conducted under the Laboratory Directed Research and Development Program
at PNNL, a multiprogram national laboratory operated by Battelle for the
U.S. Department of Energy (DOE). The work was conducted in the William
R. Wiley Environmental Molecular Sciences Laboratory, a national
scientific user facility sponsored by DOE's Office of Biological and
Environmental Research and located at PNNL. PNNL is operated by Battelle
for DOE under Contract DE-AC05-76RLO1830. Nanowires grown for this study
were synthesized at the Center for Integrated Nanotechnologies, a DOE,
Office of Basic Energy Sciences user facility at Los Alamos National
Laboratory (Contract DE-AC52-06NA25396), and Northwestern University
(NSF DMR-1006069). Work at Northwestern University was supported by NSF
DMR-1006069. J.B. and S.Z. were supported by DOE under Grant No.
DE-SC0002623.
NR 38
TC 18
Z9 18
U1 9
U2 78
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
EI 1530-6992
J9 NANO LETT
JI Nano Lett.
PD SEP
PY 2013
VL 13
IS 9
BP 4511
EP 4516
DI 10.1021/nl402429a
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 296BA
UT WOS:000330158900086
PM 23944904
ER
PT J
AU Chen, Q
Smith, JM
Park, J
Kim, K
Ho, D
Rasool, HI
Zettl, A
Alivisatos, AP
AF Chen, Qian
Smith, Jessica M.
Park, Jungwon
Kim, Kwanpyo
Ho, Davy
Rasool, Haider I.
Zettl, Alex
Alivisatos, A. Paul
TI 3D Motion of DNA-Au Nanoconjugates in Graphene Liquid Cell Electron
Microscopy
SO NANO LETTERS
LA English
DT Article
DE 3D motion; graphene liquid cell TEM; DNA nanotechnology
ID IN-SITU; LIVE CELLS; AQUEOUS-SOLUTION; PLASMON RULERS; GROWTH;
RESOLUTION; MEMBRANES; DYNAMICS; WET
AB Liquid-phase transmission electron microscopy (TEM) can probe and visualize dynamic events with structural or functional details at the nanoscale in a liquid medium. Earlier efforts have focused on the growth and transformation kinetics of hard material systems, relying on their stability under electron beam. Our recently developed graphene liquid cell technique pushed the spatial resolution of such imaging to the atomic scale but still focused on growth trajectories of metallic nanocrystals. Here, we adopt this technique to imaging three-dimensional (3D) dynamics of soft materials instead, double strand (dsDNA) connecting Au nanocrystals as one example, at nanometer resolution. We demonstrate first that a graphene liquid cell can seal an aqueous sample solution of a lower vapor pressure than previously investigated well against the high vacuum in TEM. Then, from quantitative analysis of real time nanocrystal trajectories, we show that the status and configuration of dsDNA dictate the motions of linked nanocrystals throughout the imaging time of minutes. This sustained connecting ability of dsDNA enables this unprecedented continuous imaging of its dynamics via TEM. Furthermore, the inert graphene surface minimizes sample substrate interaction and allows the whole nanostructure to rotate freely in the liquid environment; we thus develop and implement the reconstruction of 3D configuration and motions of the nanostructure from the series of 2D projected TEM images captured while it rotates. In addition to further proving the nanoconjugate structural stability, this reconstruction demonstrates 3D dynamic imaging by TEM beyond its conventional use in seeing a flattened and dry sample. Altogether, we foresee the new and exciting use of graphene liquid cell TEM in imaging 3D biomolecular transformations or interaction dynamics at nanometer resolution.
C1 [Chen, Qian; Smith, Jessica M.; Park, Jungwon; Ho, Davy; Alivisatos, A. Paul] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Chen, Qian] Univ Calif Berkeley, Miller Inst Basic Res Sci, Berkeley, CA 94720 USA.
[Kim, Kwanpyo; Rasool, Haider I.; Zettl, Alex] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Chen, Qian; Smith, Jessica M.; Park, Jungwon; Kim, Kwanpyo; Rasool, Haider I.; Zettl, Alex; Alivisatos, A. Paul] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Alivisatos, AP (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM apalivisatos@lbl.gov
RI Kim, Kwanpyo/D-9121-2011; Chen, Qian/E-9624-2014; Alivisatos , Paul
/N-8863-2015; Park, Jungwon/O-1153-2016; Zettl, Alex/O-4925-2016
OI Kim, Kwanpyo/0000-0001-8497-2330; Alivisatos , Paul
/0000-0001-6895-9048; Park, Jungwon/0000-0003-2927-4331; Zettl,
Alex/0000-0001-6330-136X
FU Defense Threat Reduction Agency (DTRA) [HDTRA1-13-1-0035]; National
Science Foundation within the Center of Integrated Nano-mechanical
Systems [EEC-0832819]; Miller Institute for Basic Research in Science at
UC Berkeley; Agilent Technologies Applications and Core Technology
University Research Grant
FX We thank Peter Ercius at National Center for Electron Microscopy and
David Chandler at UC Berkeley for useful discussions. This research was
supported in part by the Defense Threat Reduction Agency (DTRA) under
award HDTRA1-13-1-0035, which provided for in situ TEM experiments, as
well as DNA-Au nanoparticle sample preparation; by the National Science
Foundation within the Center of Integrated Nano-mechanical Systems,
under Grant EEC-0832819, which provided for early development of
graphene lamination methods. Q.C. was supported by a Miller fellowship
from Miller Institute for Basic Research in Science at UC Berkeley. J.S.
was supported by Agilent Technologies Applications and Core Technology
University Research Grant.
NR 33
TC 50
Z9 50
U1 14
U2 133
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
EI 1530-6992
J9 NANO LETT
JI Nano Lett.
PD SEP
PY 2013
VL 13
IS 9
BP 4556
EP 4561
DI 10.1021/nl402694n
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 296BA
UT WOS:000330158900094
PM 23944844
ER
PT J
AU El Ouaamari, A
Zhou, JY
Dirice, E
Liew, C
Kim, JS
Smith, R
Qian, WJ
Kulkarni, R
AF El Ouaamari, A.
Zhou, J-Y
Dirice, E.
Liew, C.
Kim, J-S
Smith, R.
Qian, W-J
Kulkarni, R.
TI Mechanisms underlying compensatory islet response to insulin resistance
SO DIABETOLOGIA
LA English
DT Meeting Abstract
CT 49th Annual Meeting of the
European-Association-for-the-Study-of-Diabetes (EASD)
CY SEP 23-27, 2013
CL Barcelona, SPAIN
SP European Assoc Study Diabet
C1 [El Ouaamari, A.; Dirice, E.; Liew, C.; Kulkarni, R.] Joslin Diabet Ctr, Boston, MA 02215 USA.
[Zhou, J-Y; Kim, J-S; Smith, R.; Qian, W-J] Pacific NW Natl Lab, Richland, WA 99352 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0012-186X
EI 1432-0428
J9 DIABETOLOGIA
JI Diabetologia
PD SEP
PY 2013
VL 56
SU 1
MA 541
BP S223
EP S223
PG 1
WC Endocrinology & Metabolism
SC Endocrinology & Metabolism
GA 282TQ
UT WOS:000329196901199
ER
PT J
AU Beiersdorfer, P
Lepson, JK
Diaz, F
Ishikawa, Y
Trabert, E
AF Beiersdorfer, P.
Lepson, J. K.
Diaz, F.
Ishikawa, Y.
Traebert, E.
TI Measurement and calculation of L-shell transitions in M-shell iron ions
SO PHYSICA SCRIPTA
LA English
DT Article; Proceedings Paper
CT 16th International Conference on the Physics of Highly Charged Ions
(HCI)
CY SEP 02-07, 2012
CL Ruprecht Karls Univ, Heidelberg, GERMANY
SP CAEN, Oerlikon Leybold Vacuum, RoentDek Handels, Struck Innovat Syst
HO Ruprecht Karls Univ
ID X-RAY; FE XVI; LABORATORY MEASUREMENTS; WAVELENGTHS; ANGSTROM; SPECTRA;
LINES; TRAP
AB We have made high-resolution measurements of the iron L-shell emission near 15 angstrom using the EBIT-I electron beam ion trap at Livermore that exhibit L-shell transitions from autoionizing levels in Fe13+, Fe14+ and Fe15+ ions. The observed L-shell iron spectra were modeled using the flexible atomic code augmented with transition energies produced by calculations based on the relativistic multi-reference Moller-Plesset (MRMP) perturbation theory, allowing us to identify multiple M-shell iron lines. Our measured values for the Fe XV emission lines are in excellent agreement with a recent measurement using the BESSY-II synchrotron but the present measurements have somewhat higher accuracy. Our MRMP calculations are compared to earlier calculations using the many-body perturbation theory approach, and we find good agreement for some but not all transitions.
C1 [Beiersdorfer, P.; Diaz, F.; Ishikawa, Y.] Univ Puerto Rico, Dept Chem, San Juan, PR 00931 USA.
[Beiersdorfer, P.; Diaz, F.; Ishikawa, Y.] Univ Puerto Rico, Chem Phys Program, San Juan, PR 00931 USA.
[Beiersdorfer, P.; Traebert, E.] Lawrence Livermore Natl Lab, Div Phys, Livermore, CA 94550 USA.
[Lepson, J. K.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
RP Beiersdorfer, P (reprint author), Univ Puerto Rico, Dept Chem, San Juan, PR 00931 USA.
EM beiersdorfer@llnl.gov
NR 18
TC 5
Z9 5
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
EI 1402-4896
J9 PHYS SCRIPTA
JI Phys. Scr.
PD SEP
PY 2013
VL T156
AR 014007
DI 10.1088/0031-8949/2013/T156/014007
PG 3
WC Physics, Multidisciplinary
SC Physics
GA 280IP
UT WOS:000329022300008
ER
PT J
AU Brandau, C
Kozhuharov, C
Muller, A
Bernhardt, D
Banas, D
Bosch, F
Currell, FJ
Dimopoulou, C
Gumberidze, A
Hagmann, S
Hillenbrand, PM
Heil, M
Lestinsky, M
Litvinov, YA
Martin, R
Nolden, F
Reuschl, R
Sanjari, S
Schippers, S
Schneider, D
Shubina, D
Simon, H
Spillmann, U
Stachura, Z
Steck, M
Stohlker, T
Weber, G
Wiedeking, M
Winckler, N
Winters, DFA
AF Brandau, C.
Kozhuharov, C.
Mueller, A.
Bernhardt, D.
Banas, D.
Bosch, F.
Currell, F. J.
Dimopoulou, C.
Gumberidze, A.
Hagmann, S.
Hillenbrand, P-M
Heil, M.
Lestinsky, M.
Litvinov, Yu A.
Maertin, R.
Nolden, F.
Reuschl, R.
Sanjari, S.
Schippers, S.
Schneider, D.
Shubina, D.
Simon, H.
Spillmann, U.
Stachura, Z.
Steck, M.
Stoehlker, Th
Weber, G.
Wiedeking, M.
Winckler, N.
Winters, D. F. A.
TI Probing nuclear properties by resonant atomic collisions between
electrons and ions
SO PHYSICA SCRIPTA
LA English
DT Article; Proceedings Paper
CT 16th International Conference on the Physics of Highly Charged Ions
(HCI)
CY SEP 02-07, 2012
CL Ruprecht Karls Univ, Heidelberg, GERMANY
SP CAEN, Oerlikon Leybold Vacuum, RoentDek Handels, Struck Innovat Syst
HO Ruprecht Karls Univ
ID TRANSITION; ENERGY; TH-229
AB The utilization of the resonant atomic electron-ion collision process of dielectronic recombination (DR) as a tool to probe nuclear properties via isotope shifts and hyperfine effects is discussed. Based on DR, this resonance reaction spectroscopy at electron coolers of heavy-ion storage rings denotes a versatile approach to access nuclear parameters such as charge radius, spin, magnetic moment or lifetimes of long-lived excited nuclear states (isomers). The high sensitivity of DR allows for experiments with artificially synthesized rare isotopes and isomers. Recent experimental progress in the preparation of such exotic species at the ESR storage ring in Darmstadt is presented. The DR technique is exemplified for the case of Pa-234(88+) (Z = 91).
C1 [Brandau, C.; Gumberidze, A.; Reuschl, R.] GSI Helmholtzzentrum Schwerionenforsch, EMMI, D-64291 Darmstadt, Germany.
[Brandau, C.; Gumberidze, A.; Reuschl, R.] GSI Helmholtzzentrum Schwerionenforsch, Div Res, D-64291 Darmstadt, Germany.
[Brandau, C.; Kozhuharov, C.; Bosch, F.; Dimopoulou, C.; Gumberidze, A.; Hagmann, S.; Hillenbrand, P-M; Heil, M.; Lestinsky, M.; Litvinov, Yu A.; Maertin, R.; Nolden, F.; Reuschl, R.; Sanjari, S.; Shubina, D.; Simon, H.; Spillmann, U.; Steck, M.; Stoehlker, Th; Weber, G.; Winckler, N.; Winters, D. F. A.] GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
[Mueller, A.; Bernhardt, D.; Hillenbrand, P-M; Schippers, S.] Univ Giessen, IAMP, D-35392 Giessen, Germany.
[Banas, D.] Jan Kochanowski Univ Humanities & Sci, PL-25406 Kielce, Poland.
[Currell, F. J.] Queens Univ Belfast, Dept Phys, Belfast BT7 1NN, Antrim, North Ireland.
[Litvinov, Yu A.; Shubina, D.] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
[Maertin, R.; Stoehlker, Th; Weber, G.] Helmholtz Inst Jena, D-07743 Jena, Germany.
[Schneider, D.; Wiedeking, M.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Stachura, Z.] Inst Fizyki Jadrowej, PL-31342 Krakow, Poland.
RP Brandau, C (reprint author), GSI Helmholtzzentrum Schwerionenforsch, EMMI, D-64291 Darmstadt, Germany.
EM c.brandau@gsi.de
RI Muller, Alfred/A-3548-2009; Banas, Dariusz/F-5025-2011; Schippers,
Stefan/A-7786-2008
OI Muller, Alfred/0000-0002-0030-6929; Banas, Dariusz/0000-0003-1566-5446;
Schippers, Stefan/0000-0002-6166-7138
NR 20
TC 12
Z9 12
U1 1
U2 11
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
EI 1402-4896
J9 PHYS SCRIPTA
JI Phys. Scr.
PD SEP
PY 2013
VL T156
AR 014050
DI 10.1088/0031-8949/2013/T156/014050
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 280IP
UT WOS:000329022300051
ER
PT J
AU Brown, GV
Beilmann, C
Bernitt, S
Clementson, J
Eberle, S
Epp, SW
Graf, A
Hell, N
Kelley, RL
Kilbourne, CA
Kubicek, K
Leutenegger, MA
Mackel, V
Porter, FS
Rudolph, JK
Simon, MC
Steinbrugge, R
Trabert, E
Ullrich, J
Lopez-Urrutia, JRC
Beiersdorfer, P
AF Brown, G. V.
Beilmann, C.
Bernitt, S.
Clementson, J.
Eberle, S.
Epp, S. W.
Graf, A.
Hell, N.
Kelley, R. L.
Kilbourne, C. A.
Kubicek, K.
Leutenegger, M. A.
Maeckel, V.
Porter, F. S.
Rudolph, J. K.
Simon, M. C.
Steinbruegge, R.
Traebert, E.
Ullrich, J.
Lopez-Urrutia, J. R. Crespo
Beiersdorfer, P.
TI Studies of highly charged iron ions using electron beam ion traps for
interpreting astrophysical spectra
SO PHYSICA SCRIPTA
LA English
DT Article; Proceedings Paper
CT 16th International Conference on the Physics of Highly Charged Ions
(HCI)
CY SEP 02-07, 2012
CL Ruprecht Karls Univ, Heidelberg, GERMANY
SP CAEN, Oerlikon Leybold Vacuum, RoentDek Handels, Struck Innovat Syst
HO Ruprecht Karls Univ
ID FE XVI; SPECTROMETER; EMISSION; SPECTROSCOPY; EXCHANGE; EBIT
AB For over a decade, the x-ray astrophysics community has enjoyed a fruitful epoch of discovery largely as a result of the successful launch and operation of the high resolution, high sensitivity spectrometers on board the Chandra, XMM-Newton and Suzaku x-ray observatories. With the launch of the x-ray calorimeter spectrometer on the Astro-H x-ray observatory in 2014, the diagnostic power of high resolution spectroscopy will be extended to some of the hottest, largest and most exotic objects in our Universe. The diagnostic utility of these spectrometers is directly coupled to, and often limited by, our understanding of the x-ray production mechanisms associated with the highly charged ions present in the astrophysical source. To provide reliable benchmarks of theoretical calculations and to address specific problems facing the x-ray astrophysics community, electron beam ion traps have been used in laboratory astrophysics experiments to study the x-ray signatures of highly charged ions. A brief overview of the EBIT-I electron beam ion trap operated at Lawrence Livermore National Laboratory and the Max-Planck-Institut fur Kernphysik's FLASH-EBIT operated at third and fourth generation advanced light sources, including a discussion of some of the results are presented.
C1 [Brown, G. V.; Clementson, J.; Graf, A.; Traebert, E.; Beiersdorfer, P.] Lawrence Livermore Natl Lab, Div Phys, Livermore, CA 94550 USA.
[Beilmann, C.; Bernitt, S.; Eberle, S.; Kubicek, K.; Maeckel, V.; Rudolph, J. K.; Steinbruegge, R.; Ullrich, J.; Lopez-Urrutia, J. R. Crespo] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
[Epp, S. W.] Ctr Free Electron Laser Sci, Max Planck Adv Study Grp, D-22607 Hamburg, Germany.
[Hell, N.] Univ Erlangen Nurnberg, Dr Karl Remeis Sternwarte Bamberg & Erlangen Ctr, D-96049 Bamberg, Germany.
[Kelley, R. L.; Kilbourne, C. A.; Leutenegger, M. A.; Porter, F. S.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Leutenegger, M. A.] Univ Maryland, Dept Phys, Baltimore, MD 21250 USA.
[Rudolph, J. K.] Univ Giessen, Inst Atom & Mol Phys, D-35392 Giessen, Germany.
[Simon, M. C.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
RP Brown, GV (reprint author), Lawrence Livermore Natl Lab, Div Phys, Livermore, CA 94550 USA.
EM brown86@llnl.gov
RI Porter, Frederick/D-3501-2012; Crespo Lopez-Urrutia, Jose
R./F-7069-2011; Simon, Martin/I-5384-2012;
OI Porter, Frederick/0000-0002-6374-1119; Crespo Lopez-Urrutia, Jose
R./0000-0002-2937-8037; Hell, Natalie/0000-0003-3057-1536; Epp,
Sascha/0000-0001-6366-9113
NR 27
TC 1
Z9 1
U1 0
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
EI 1402-4896
J9 PHYS SCRIPTA
JI Phys. Scr.
PD SEP
PY 2013
VL T156
AR 014001
DI 10.1088/0031-8949/2013/T156/014001
PG 3
WC Physics, Multidisciplinary
SC Physics
GA 280IP
UT WOS:000329022300002
ER
PT J
AU Hagmann, S
Stohlker, T
Litvinov, Y
Kozhuharov, C
Hillenbrand, PM
Spillmann, U
Shabaev, V
Stiebing, K
Lestinsky, M
Surzhykov, A
Voitkiv, A
Franzke, B
Fischer, D
Schneider, D
Jakubassa, D
Artiomov, A
DeFilippo, E
Ma, X
Dorner, R
Rothard, H
AF Hagmann, S.
Stoehlker, Th
Litvinov, Yu
Kozhuharov, C.
Hillenbrand, P-M
Spillmann, U.
Shabaev, V.
Stiebing, K.
Lestinsky, M.
Surzhykov, A.
Voitkiv, A.
Franzke, B.
Fischer, D.
Schneider, D.
Jakubassa, D.
Artiomov, A.
DeFilippo, E.
Ma, X.
Doerner, R.
Rothard, H.
TI Few-body quantum dynamics of high-Z ions studied at the future
relativistic high-energy storage ring
SO PHYSICA SCRIPTA
LA English
DT Article; Proceedings Paper
CT 16th International Conference on the Physics of Highly Charged Ions
(HCI)
CY SEP 02-07, 2012
CL Ruprecht Karls Univ, Heidelberg, GERMANY
SP CAEN, Oerlikon Leybold Vacuum, RoentDek Handels, Struck Innovat Syst
HO Ruprecht Karls Univ
ID COLLISIONS
AB At the FAIR facility for antiprotons and ion research, the high-energy storage ring will provide highly charged heavy ions with Z all the way to Z = 92 for beam energies ranging from 200 A MeV up to energies of approximately 5 A GeV. This opens up a wealth of opportunities for in-ring atomic physics experiments on few-body quantum dynamics ranging from, for example, the correlated dynamics of various e(+)-e(-) pair creation processes to quasi-photoionization of inner shells of the highest-Z ions.
C1 [Hagmann, S.; Stiebing, K.; Doerner, R.] Goethe Univ Frankfurt, Inst Kernphys, Frankfurt, Germany.
[Hagmann, S.; Stoehlker, Th; Litvinov, Yu; Kozhuharov, C.; Hillenbrand, P-M; Spillmann, U.; Shabaev, V.; Lestinsky, M.; Franzke, B.] GSI Helmholtzzentrum, Darmstadt, Germany.
[Stoehlker, Th] Univ Jena, Inst Phys, Jena, Germany.
[Stoehlker, Th] Helmholtz Inst, Jena, Germany.
[Hillenbrand, P-M] Univ Giessen, Inst Atom & Mol Phys, Giessen, Germany.
[Shabaev, V.] St Petersburg State Univ, Dept Phys, St Petersburg 199034, Russia.
[Surzhykov, A.; Fischer, D.] Heidelberg Univ, Inst Phys, Heidelberg, Germany.
[Voitkiv, A.] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
[Schneider, D.] Extreme Matter Inst EMMI, Darmstadt, Germany.
[Schneider, D.] LLNL, Livermore, CA USA.
[Jakubassa, D.] Math Inst LMU Munchen, Munich, Germany.
[Artiomov, A.] JINR, Veksler & Baldin Lab, Dubna, Russia.
[DeFilippo, E.] INFN LNS Sez Catania, Catania, Italy.
[Ma, X.] Inst Modern Phys, Lanzhou, Peoples R China.
[Rothard, H.] CIRIL GANIL, Caen, France.
RP Hagmann, S (reprint author), Goethe Univ Frankfurt, Inst Kernphys, Frankfurt, Germany.
EM s.hagmann@gsi.de
RI Doerner, Reinhard/A-5340-2008; Fischer, Daniel/I-5573-2014; Shabaev,
Vladimir/J-7400-2013
OI Doerner, Reinhard/0000-0002-3728-4268; Shabaev,
Vladimir/0000-0002-2769-6891
NR 11
TC 0
Z9 0
U1 0
U2 10
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
EI 1402-4896
J9 PHYS SCRIPTA
JI Phys. Scr.
PD SEP
PY 2013
VL T156
DI 10.1088/0031-8949/2013/T156/014086
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 280IP
UT WOS:000329022300087
ER
PT J
AU Hell, N
Miskovicova, I
Brown, GV
Wilms, J
Clementson, J
Hanke, M
Beiersdorfer, P
Liedahl, D
Pottschmidt, K
Porter, FS
Kilbourne, CA
Kelley, RL
Nowak, MA
Schulz, NS
AF Hell, Natalie
Miskovicova, I.
Brown, G. V.
Wilms, J.
Clementson, J.
Hanke, M.
Beiersdorfer, P.
Liedahl, D.
Pottschmidt, K.
Porter, F. S.
Kilbourne, C. A.
Kelley, R. L.
Nowak, M. A.
Schulz, N. S.
TI Low charge states of Si and S in Cygnus X-1
SO PHYSICA SCRIPTA
LA English
DT Article; Proceedings Paper
CT 16th International Conference on the Physics of Highly Charged Ions
(HCI)
CY SEP 02-07, 2012
CL Ruprecht Karls Univ, Heidelberg, GERMANY
SP CAEN, Oerlikon Leybold Vacuum, RoentDek Handels, Struck Innovat Syst
HO Ruprecht Karls Univ
ID RAY; CHANDRA; WIND
AB Strong, relatively short, absorption dips have been observed in the x-ray light curves measured from the high mass x-ray binary system Cygnus X-1. With increasing strength of the dips, which are believed to be caused by 'clumps' of cold material present in the stellar wind of Cyg X-1's companion star, K-shell absorption lines in L-shell ions of Si and S develop. To determine the bulk motion of the clumps via the Doppler shifts of these lines with high accuracy, we measured their reference energies using the Lawrence Livermore National Laboratory electron beam ion trap EBIT-I and EBIT Calorimeter Spectrometer. Our findings-shifts consistent with zero velocity of the absorber throughout all ionization states at orbital phase zero-provide evidence for an onion-like ion structure of the clumps.
C1 [Hell, Natalie; Miskovicova, I.; Wilms, J.; Hanke, M.] Univ Erlangen Nurnberg, Dr Karl Remeis Sternwarte & Erlangen Ctr Astropar, D-96049 Bamberg, Germany.
[Hell, Natalie; Brown, G. V.; Clementson, J.; Beiersdorfer, P.; Liedahl, D.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Pottschmidt, K.; Porter, F. S.; Kilbourne, C. A.; Kelley, R. L.] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA.
[Pottschmidt, K.] Univ Maryland Baltimore Cty, CRESST, Baltimore, MD 21250 USA.
[Nowak, M. A.; Schulz, N. S.] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.
RP Hell, N (reprint author), Univ Erlangen Nurnberg, Dr Karl Remeis Sternwarte & Erlangen Ctr Astropar, Sternwartstr 7, D-96049 Bamberg, Germany.
EM natalie.hell@sternwarte.uni-erlangen.de
RI Wilms, Joern/C-8116-2013; Porter, Frederick/D-3501-2012;
OI Wilms, Joern/0000-0003-2065-5410; Porter, Frederick/0000-0002-6374-1119;
Hell, Natalie/0000-0003-3057-1536
NR 12
TC 6
Z9 6
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
EI 1402-4896
J9 PHYS SCRIPTA
JI Phys. Scr.
PD SEP
PY 2013
VL T156
AR 014008
DI 10.1088/0031-8949/2013/T156/014008
PG 3
WC Physics, Multidisciplinary
SC Physics
GA 280IP
UT WOS:000329022300009
ER
PT J
AU Hillenbrand, PM
Hagmann, S
Stohlker, T
Litvinov, Y
Kozhuharov, C
Spillmann, U
Shabaev, V
Stiebing, K
Lestinsky, M
Surzhykov, A
Voitkiv, A
Franzke, B
Fischer, D
Brandau, C
Schippers, S
Mueller, A
Schneider, D
Jakubassa, D
Artiomov, A
DeFilippo, E
Ma, X
Dorner, R
Rothard, H
AF Hillenbrand, P. M.
Hagmann, S.
Stoehlker, Th
Litvinov, Yu
Kozhuharov, C.
Spillmann, U.
Shabaev, V.
Stiebing, K.
Lestinsky, M.
Surzhykov, A.
Voitkiv, A.
Franzke, B.
Fischer, D.
Brandau, C.
Schippers, S.
Mueller, A.
Schneider, D.
Jakubassa, D.
Artiomov, A.
DeFilippo, E.
Ma, X.
Doerner, R.
Rothard, H.
TI Future experiments using forward electron spectroscopy to study the
quantum dynamics of high-Z ions at the ESR/CRYRING storage rings
SO PHYSICA SCRIPTA
LA English
DT Article; Proceedings Paper
CT 16th International Conference on the Physics of Highly Charged Ions
(HCI)
CY SEP 02-07, 2012
CL Ruprecht Karls Univ, Heidelberg, GERMANY
SP CAEN, Oerlikon Leybold Vacuum, RoentDek Handels, Struck Innovat Syst
HO Ruprecht Karls Univ
ID COPLANAR ASYMMETRIC GEOMETRY; IONIZATION
AB At the FAIR facility for antiproton and ion research, the new ESR + CRYRING combination of storage rings CRYRING@ESR opens up a wealth of opportunities for in-ring atomic physics experiments on few-body quantum dynamics. The low-energy storage ring CRYRING will serve in its new location at FAIR/ESR for experiments with decelerated antiprotons and highly charged ions. We will discuss selected new experiments in the field of quantum dynamics of high-Z ions, for example for adiabatic superheavy quasi-molecules transiently formed with bare and H-like projectiles. Such experiments will be for the first time possible at the future CRYRING at ESR.
C1 [Hillenbrand, P. M.; Hagmann, S.; Stoehlker, Th; Litvinov, Yu; Kozhuharov, C.; Spillmann, U.; Shabaev, V.; Franzke, B.; Doerner, R.] GSI Helmholtzzentrum, Darmstadt, Germany.
[Hillenbrand, P. M.; Schippers, S.; Mueller, A.] Univ Giessen, Inst Atom & Mol Phys, D-35390 Giessen, Germany.
[Hagmann, S.; Stiebing, K.; Lestinsky, M.] Goethe Univ Frankfurt, Inst Kernphys, Frankfurt, Germany.
[Stoehlker, Th] Univ Jena, Inst Phys, Jena, Germany.
[Stoehlker, Th] Helmholtz Inst, Jena, Germany.
[Shabaev, V.] St Petersburg State Univ, Deparment Phys, St Petersburg 199034, Russia.
[Surzhykov, A.] Heidelberg Univ, Inst Phys, Heidelberg, Germany.
[Fischer, D.] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
[Brandau, C.] Extreme Matter Inst EMMI, Darmstadt, Germany.
[Schneider, D.] LLNL, Livermore, CA USA.
[Jakubassa, D.] Math Inst LMU Munchen, Munich, Germany.
[Artiomov, A.] JINR, Veksler & Baldin Lab, Dubna, Russia.
[DeFilippo, E.] INFN LNS Sez Catania, Catania, Italy.
[Ma, X.] Inst Modern Phys, Lanzhou, Peoples R China.
[Rothard, H.] CIRIL GANIL, Caen, France.
RP Hillenbrand, PM (reprint author), GSI Helmholtzzentrum, Darmstadt, Germany.
EM s.hagmann@gsi.de
RI Doerner, Reinhard/A-5340-2008; Muller, Alfred/A-3548-2009; Fischer,
Daniel/I-5573-2014; Shabaev, Vladimir/J-7400-2013; Schippers,
Stefan/A-7786-2008
OI Doerner, Reinhard/0000-0002-3728-4268; Muller,
Alfred/0000-0002-0030-6929; Shabaev, Vladimir/0000-0002-2769-6891;
Schippers, Stefan/0000-0002-6166-7138
NR 28
TC 0
Z9 0
U1 0
U2 9
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
EI 1402-4896
J9 PHYS SCRIPTA
JI Phys. Scr.
PD SEP
PY 2013
VL T156
DI 10.1088/0031-8949/2013/T156/014087
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 280IP
UT WOS:000329022300088
ER
PT J
AU Lepson, JK
Beiersdorfer, P
Bitter, M
Roquemore, AL
Kaita, R
AF Lepson, J. K.
Beiersdorfer, P.
Bitter, M.
Roquemore, A. L.
Kaita, R.
TI Emission lines of iron in the 150-250 angstrom region on National
Spherical Torus Experiment
SO PHYSICA SCRIPTA
LA English
DT Article; Proceedings Paper
CT 16th International Conference on the Physics of Highly Charged Ions
(HCI)
CY SEP 02-07, 2012
CL Ruprecht Karls Univ, Heidelberg, GERMANY
SP CAEN, Oerlikon Leybold Vacuum, RoentDek Handels, Struck Innovat Syst
HO Ruprecht Karls Univ
ID EXTREME-ULTRAVIOLET REGION; ATOMIC DATABASE; FE-VII; CHIANTI
AB We measured iron emission from the National Spherical Tokamak Experiment. We focused our attention on several band pass regions of the Solar Dynamics Observatory's Atmospheric Imaging Assembly. We found that all significant iron emission in the 171, 193 and 211 angstrom band pass regions are accounted for by the CHIANTI atomic database, although some strong emission lines of carbon are present that may complicate interpretation of solar data if not taken into account.
C1 [Lepson, J. K.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Beiersdorfer, P.] Univ Puerto Rico, Dept Chem, San Juan, PR 00931 USA.
[Beiersdorfer, P.] Univ Puerto Rico, Chem Phys Program, San Juan, PR 00931 USA.
[Bitter, M.; Roquemore, A. L.; Kaita, R.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Beiersdorfer, P.] Lawrence Livermore Natl Lab, Div Phys, Livermore, CA 94550 USA.
RP Lepson, JK (reprint author), Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
EM lepson@ssl.berkeley.edu
NR 14
TC 0
Z9 0
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
EI 1402-4896
J9 PHYS SCRIPTA
JI Phys. Scr.
PD SEP
PY 2013
VL T156
DI 10.1088/0031-8949/2013/T156/014075
PG 3
WC Physics, Multidisciplinary
SC Physics
GA 280IP
UT WOS:000329022300076
ER
PT J
AU Leutenegger, MA
Betancourt-Martinez, GL
Beiersdorfer, P
Brown, GV
Kelley, RL
Kilbourne, CA
Porter, FS
AF Leutenegger, Maurice A.
Betancourt-Martinez, Gabriele L.
Beiersdorfer, Peter
Brown, Gregory V.
Kelley, Richard L.
Kilbourne, Caroline A.
Porter, F. Scott
TI Charge exchange measurements with an x-ray calorimeter at an electron
beam ion trap
SO PHYSICA SCRIPTA
LA English
DT Article; Proceedings Paper
CT 16th International Conference on the Physics of Highly Charged Ions
(HCI)
CY SEP 02-07, 2012
CL Ruprecht Karls Univ, Heidelberg, GERMANY
SP CAEN, Oerlikon Leybold Vacuum, RoentDek Handels, Struck Innovat Syst
HO Ruprecht Karls Univ
ID EXCITED-STATES; TOKAMAK; POPULATION; PLASMAS
AB We present K-shell x-ray spectra of highly ionized Mg acquired with the EBIT calorimeter spectrometer at a resolution of 4.5 eV in charge exchange recombination experiments using the LLNL EBIT-I electron beam ion trap. We measured the Doppler width of Mg11+ Ly alpha in the same experiments using a high resolution crystal spectrometer, giving an estimate of the ion temperature. We find hardness ratios for Mg11+ ranging from 0.6 to 1.6, depending on the neutral gas target. In most of the experiments, the ion temperature was similar to 10-15 eV amu(-1), indicating that the variations in hardness ratio are intrinsic to the choice of neutral target gas, and are not simply a consequence of variations in the collision velocity resulting from evaporative cooling of the trapped ions. The spectral variations show that high resolution x-ray spectroscopy is highly diagnostic of charge exchange reactions, but requires well-developed theory to interpret.
C1 [Leutenegger, Maurice A.; Betancourt-Martinez, Gabriele L.; Kelley, Richard L.; Kilbourne, Caroline A.; Porter, F. Scott] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Leutenegger, Maurice A.] CRESST, Baltimore, MD 21250 USA.
[Leutenegger, Maurice A.] Univ Maryland Baltimore Cty, Baltimore, MD 21250 USA.
[Betancourt-Martinez, Gabriele L.] CRESST, College Pk, MD 20742 USA.
[Betancourt-Martinez, Gabriele L.] Univ Maryland, College Pk, MD 20742 USA.
[Beiersdorfer, Peter; Brown, Gregory V.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Leutenegger, MA (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM maurice.a.leutenegger@nasa.gov
RI Porter, Frederick/D-3501-2012
OI Porter, Frederick/0000-0002-6374-1119
NR 19
TC 2
Z9 2
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
EI 1402-4896
J9 PHYS SCRIPTA
JI Phys. Scr.
PD SEP
PY 2013
VL T156
AR 014006
DI 10.1088/0031-8949/2013/T156/014006
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 280IP
UT WOS:000329022300007
ER
PT J
AU Trabert, E
Beiersdorfer, P
AF Traebert, Elmar
Beiersdorfer, Peter
TI Measurement and modeling of the n=2-3 emission of O VIII near 102
angstrom
SO PHYSICA SCRIPTA
LA English
DT Article; Proceedings Paper
CT 16th International Conference on the Physics of Highly Charged Ions
(HCI)
CY SEP 02-07, 2012
CL Ruprecht Karls Univ, Heidelberg, GERMANY
SP CAEN, Oerlikon Leybold Vacuum, RoentDek Handels, Struck Innovat Syst
HO Ruprecht Karls Univ
ID BEAM ION-TRAP; ELECTRON-BEAM; X-RAY; EXTREME-ULTRAVIOLET;
HIGH-RESOLUTION; LINE RATIOS; FE-XVIII; SPECTROSCOPY; XIX
AB In observations of Capella, the x-ray ultraviolet (XUV) emission compared to the extreme ultraviolet (EUV) emission significantly exceeds expectation from collisional-radiative spectral modeling. This discrepancy is presently undergoing experimental verification at an electron beam ion trap. An important step of the procedure is the relative efficiency calibration of spectroscopic detection equipment for EUV and XUV observations, for which we use the branching ratio of 1s-3p and 2s-3p transitions in the H-like spectrum O VIII. We present high-resolution measurements and associated modeling of the O VIII emission near 102 angstrom, which consists not only of the two 2s-3p transitions, but also of two 2p-3s and three 2p-3d transitions.
C1 [Traebert, Elmar; Beiersdorfer, Peter] Lawrence Livermore Natl Lab, Div Phys, Livermore, CA 94550 USA.
[Traebert, Elmar] Ruhr Univ Bochum, Astron Inst, Fak Phys & Astron, D-44780 Bochum, Germany.
RP Trabert, E (reprint author), Lawrence Livermore Natl Lab, Div Phys, Livermore, CA 94550 USA.
EM traebert@astro.rub.de
NR 12
TC 2
Z9 2
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
EI 1402-4896
J9 PHYS SCRIPTA
JI Phys. Scr.
PD SEP
PY 2013
VL T156
AR 014003
DI 10.1088/0031-8949/2013/T156/014003
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 280IP
UT WOS:000329022300004
ER
PT J
AU Klein-Marcuschamer, D
AF Klein-Marcuschamer, Daniel
TI A Matter of Detail: Assessing the True Potential of Microalgal Biofuels
SO BIOTECHNOLOGY AND BIOENGINEERING
LA English
DT Editorial Material
C1 [Klein-Marcuschamer, Daniel] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
[Klein-Marcuschamer, Daniel] Joint BioEnergy Inst, Deconstruct Div, Emeryville, CA 94608 USA.
[Klein-Marcuschamer, Daniel] Univ Queensland, Australian Inst Bioengn & Nanotechnol, St Lucia, Qld, Australia.
RP Klein-Marcuschamer, D (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, 1 Cyclotron Rd MS 978-4121, Berkeley, CA 94720 USA.
OI Chisti, Yusuf/0000-0002-0826-7012
NR 10
TC 17
Z9 18
U1 1
U2 19
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0006-3592
EI 1097-0290
J9 BIOTECHNOL BIOENG
JI Biotechnol. Bioeng.
PD SEP
PY 2013
VL 110
IS 9
BP 2317
EP 2318
PG 2
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 283WK
UT WOS:000329277500001
PM 23733523
ER
PT J
AU Kassianov, E
Flynn, C
Koontz, A
Sivaraman, C
Barnard, J
AF Kassianov, Evgueni
Flynn, Connor
Koontz, Annette
Sivaraman, Chitra
Barnard, James
TI Failure and Redemption of Multifilter Rotating Shadowband Radiometer
(MFRSR)/Normal Incidence Multifilter Radiometer (NIMFR) Cloud Screening:
Contrasting Algorithm Performance at Atmospheric Radiation Measurement
(ARM) North Slope of Alaska (NSA) and Southern Great Plains (SGP) Sites
SO ATMOSPHERE
LA English
DT Article
DE Multifilter Rotating Shadowband Radiometer (MFRSR); Normal Incidence
Multifilter Radiometer (NIMFR); aerosol optical depth and Angstrom
exponent; ground-based multi-spectral measurements; cloud-screening
algorithms; direct-beam sun transmittance; Atmospheric Radiation
Measurement (ARM) North Slope of Alaska (NSA) sites
ID ALL-SKY IMAGES; MEASUREMENT PROGRAM; PHOTOMETER DATA; AEROSOL; AERONET;
SIMULATIONS
AB Well-known cloud-screening algorithms, which are designed to remove cloud-contaminated aerosol optical depths (AOD) from Multifilter Rotating Shadowband Radiometer (MFRSR) and Normal Incidence Multifilter Radiometer (NIMFR) measurements, have exhibited excellent performance at many middle-to-low latitude sites around world. However, they may occasionally fail under challenging observational conditions, such as when the sun is low (near the horizon) and when optically thin clouds with small spatial inhomogeneity occur. Such conditions have been observed quite frequently at the high-latitude Atmospheric Radiation Measurement (ARM) North Slope of Alaska (NSA) sites. A slightly modified cloud-screening version of the standard algorithm is proposed here with a focus on the ARM-supported MFRSR and NIMFR data. The modified version uses approximately the same techniques as the standard algorithm, but it additionally examines the magnitude of the slant-path line of sight transmittance and eliminates points when the observed magnitude is below a specified threshold. Substantial improvement of the multi-year (1999-2012) aerosol product (AOD and its Angstrom exponent) is shown for the NSA sites when the modified version is applied. Moreover, this version reproduces the AOD product at the ARM Southern Great Plains (SGP) site, which was originally generated by the standard cloud-screening algorithms. The proposed minor modification is easy to implement and its application to existing and future cloud-screening algorithms can be particularly beneficial for challenging observational conditions.
C1 [Kassianov, Evgueni; Flynn, Connor; Koontz, Annette; Sivaraman, Chitra; Barnard, James] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Kassianov, E (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM evgueni.kassianov@pnnl.gov; connor.flynn@pnnl.gov;
annette.koontz@pnnl.gov; chitra.sivaraman@pnnl.gov;
james.barnard@pnnl.gov
FU Office of Biological and Environmental Research (OBER) of the US
Department of Energy (DOE) as part of the Atmospheric Radiation
Measurement (ARM) Program; DOE [DE-A06-76RLO 1830]; Office of Biological
and Environmental Research (OBER) of the US Department of Energy (DOE)
as part of the Atmospheric System Research (ASR) Program
FX This work has been supported by the Office of Biological and
Environmental Research (OBER) of the US Department of Energy (DOE) as
part of the Atmospheric Radiation Measurement (ARM) and Atmospheric
System Research (ASR) Programs. The Pacific Northwest National
Laboratory (PNNL) is operated by Battelle for the DOE under contract
DE-A06-76RLO 1830. We thank five anonymous reviewers for the
constructive comments, which improved the paper.
NR 30
TC 1
Z9 1
U1 2
U2 9
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 2073-4433
J9 ATMOSPHERE-BASEL
JI Atmosphere
PD SEP
PY 2013
VL 4
IS 3
BP 299
EP 314
DI 10.3390/atmos4030299
PG 16
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 274TM
UT WOS:000328629100004
ER
PT J
AU Retallack, GJ
Krull, ES
Thackray, GD
Parkinson, D
AF Retallack, Gregory J.
Krull, Evelyn S.
Thackray, Glenn D.
Parkinson, Dula
TI Problematic urn-shaped fossils from a Paleoproterozoic (2.2 Ga) paleosol
in South Africa
SO PRECAMBRIAN RESEARCH
LA English
DT Article
DE Paleosol; Lichen; South Africa; Paleoproterozoic; Hekpoort Basalt
ID PRECAMBRIAN ATMOSPHERIC COMPOSITION; METAL BIOACCUMULATION; SOIL
FORMATION; TRANSVAAL SUPERGROUP; WITWATERSRAND BASIN; WESTERN-AUSTRALIA;
TERRESTRIAL BIOTA; GRIQUALAND WEST; EARLY EVOLUTION; PILBARA CRATON
AB Small (0.3-1.8 mm long), locally abundant, urn-shaped fossils within surface horizons of a paleosol in the 2.2 Ga Hekpoort Formation near Waterval Onder, South Africa, are here described and named Diskagma buttonii Retallack gen. et sp. nov. The fossils are from fresh rock of a deep highway cutting, and have been metamorphosed to upper greenschist fades like their matrix. Despite metamorphic alteration, total organic carbon of the samples was 0.04% and its isotopic composition (delta C-13) was -25.6 +/- 0.08 parts per thousand (two standard deviations) versus Vienna Pee Dee belemnite standard. Organic outlines of the fossils are also accentuated by recystallized berthierine and opaque oxides. The fossils are locally clumped within surface swales of a Vertisol paleosol, identified from characteristic penecontemporaneous deformation (clastic dikes between swales of mukkara structure) and from pronounced geochemical differentiation (phosphorus and copper strain-corrected mass-depletion characteristic of an oxidized biologically active soil). This paleosol's chemical composition is evidence of temperate humid climate (mean annual temperature 11.3 +/- 4.4 degrees C, and mean annual precipitation 1489 +/- 182 mm). Associated paleosols indicate atmospheric CO2 of 6640 (+12,880/-4293) ppm (0.6%) and 0.9-5% atmospheric O-2. The best preserved examples of Diskagrna are shaped like an urn with a flared rim, and closed below the flare. Observation of hundreds of specimens in thin section reveals substantial variation in growth (elongation) and decay (shredding and deflation). They had a hollow ellipsoidal interior that is unusually devoid of opaque debris, unlike the matrix. Diskagma is superficially comparable with lichens such as Cladonia (Ascomycota) and Geosiphon (Glomeromycota). Definitive reproductive structures remain unknown. They predate the oldest other likely fossil eukaryotes (1.9 Ga) and fungi (1.5 Ga), and current molecular clock estimates for eukaryotes (1.6 Ga) and fungi (1.1 Ga). Lichenized actinobacteria are plausible prokaryotic alternatives permitted by molecular clocks. Although biological affinities of Diskagma are uncertain, these fossils reveal the general appearance of Paleoproterozoic life on land. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Retallack, Gregory J.] Univ Oregon, Dept Geol Sci, Eugene, OR 97403 USA.
[Krull, Evelyn S.] CSIRO Land & Water, Glen Osmond, SA 5064, Australia.
[Thackray, Glenn D.] Idaho State Univ, Dept Geosci, Pocatello, ID 83209 USA.
[Parkinson, Dula] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Retallack, GJ (reprint author), Univ Oregon, Dept Geol Sci, Eugene, OR 97403 USA.
EM gregr@uoregon.edu
RI Parkinson, Dilworth/A-2974-2015
OI Parkinson, Dilworth/0000-0002-1817-0716
NR 136
TC 12
Z9 13
U1 4
U2 20
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0301-9268
EI 1872-7433
J9 PRECAMBRIAN RES
JI Precambrian Res.
PD SEP
PY 2013
VL 235
BP 71
EP 87
DI 10.1016/j.precamres.2013.05.015
PG 17
WC Geosciences, Multidisciplinary
SC Geology
GA 273GD
UT WOS:000328522400005
ER
PT J
AU Wang, D
Kang, S
Nichols, J
Post, W
Liu, S
Zhao, Z
AF Wang, D.
Kang, S.
Nichols, J.
Post, W.
Liu, S.
Zhao, Z.
TI A computational framework for spatially explicit agroecosystem modeling:
Application to regional simulation
SO JOURNAL OF COMPUTATIONAL SCIENCE
LA English
DT Article
DE Environmental software system design; Spatially explicit simulation;
Agroecosystem; High performance computing; Data management
ID COUPLING TOOLKIT; SYSTEM; SUSTAINABILITY
AB Site-based agroecosystem model has been applied at regional and state level to enable comprehensive analyses of environmental sustainability of food and biofuel production. However, spatially explicit ecosystem simulations over large landscape present computational challenges. This paper presents a framework to support spatially explicit agroecosystem modeling and data analysis over large landscape, which includes four major phases of agroecosystem simulation: simulation data preparation, site-based simulation on high performance computers, data management and data analysis. Then, a case study on a regional intensive modeling area (RIMA) was presented as an application to demonstrate the system implementation and capability. (C) 2012 Elsevier B.V. All rights reserved.
C1 [Wang, D.; Kang, S.; Nichols, J.; Post, W.] Oak Ridge Natl Lab, Div Environm Sci, Climate Change Sci Inst, Oak Ridge, TN 37831 USA.
[Liu, S.; Zhao, Z.] Univ Tennessee, Dept Geog, Knoxville, TN 37996 USA.
RP Wang, D (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Climate Change Sci Inst, POB 2008, Oak Ridge, TN 37831 USA.
EM wangd@ornl.gov
FU Great Lake Bioenergy Research Center (GLBRC); Office of Science of the
U.S. Department of Energy (DOE); UT-Battelle LLC for the Department of
Energy [DE-AC05-00OR22725]
FX The research was funded by the Great Lake Bioenergy Research Center
(GLBRC) as well as the Office of Science of the U.S. Department of
Energy (DOE). Oak Ridge National Laboratory is managed by UT-Battelle
LLC for the Department of Energy under contract DE-AC05-00OR22725. We
also would like to acknowledge Terry Copeland Pfeiffer for her
assistance with manuscript editing.
NR 28
TC 1
Z9 1
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1877-7503
J9 J COMPUT SCI-NETH
JI J. Comput. Sci.
PD SEP
PY 2013
VL 4
IS 5
SI SI
BP 386
EP 392
DI 10.1016/j.jocs.2012.08.018
PG 7
WC Computer Science, Interdisciplinary Applications; Computer Science,
Theory & Methods
SC Computer Science
GA 270CS
UT WOS:000328297100010
ER
PT J
AU Deodeshmukh, VP
Srivastava, SK
Bai, J
AF Deodeshmukh, V. P.
Srivastava, S. K.
Bai, J.
TI Early-stage oxidation behavior of Co-rich high-temperature alloys
SO MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
LA English
DT Article
ID OXIDE SCALES
C1 [Deodeshmukh, V. P.; Srivastava, S. K.] Haynes Int Inc, Res & Technol, Kokomo, IN 46904 USA.
[Bai, J.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Deodeshmukh, VP (reprint author), Haynes Int Inc, Res & Technol, 1020 W Pk Ave, Kokomo, IN 46904 USA.
EM vdeodeshmukh@haynesintl.com
FU U.S. Department of Energy, Office of Energy Efficiency and Renewable
Energy, and Vehicle Technologies Program, through the Oak Ridge National
Laboratory's High Temperature Materials Laboratory user program
FX Research at the X14A beamline was partially sponsored by the U.S.
Department of Energy, Office of Energy Efficiency and Renewable Energy,
and Vehicle Technologies Program, through the Oak Ridge National
Laboratory's High Temperature Materials Laboratory user program.
NR 8
TC 2
Z9 2
U1 0
U2 5
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0947-5117
EI 1521-4176
J9 MATER CORROS
JI Mater. Corros.
PD SEP
PY 2013
VL 64
IS 9
BP 772
EP 776
PG 5
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 264HQ
UT WOS:000327868000003
ER
PT J
AU Berezovets', VV
Denys, RV
Zavalii, IY
Paul-Boncour, V
Pecharsky, V
AF Berezovets', V. V.
Denys, R. V.
Zavalii, I. Yu
Paul-Boncour, V.
Pecharsky, V.
TI Characteristic Features of the Sorption-Desorption of Hydrogen by
Mg-M-Ni (M = Al, Mn, Ti) Ternary Alloys
SO MATERIALS SCIENCE
LA English
DT Article
DE hydrogen; magnesium compounds; magnesium alloys; hydrides
ID HYDRIDE; SYSTEM; MG2FEH6; STORAGE
AB By the method of high-energy milling in a ball mill, we obtain new alloys of Mg-M-Ni (M = Al, Mn, Ti) ternary systems. The properties of hydrogen sorption of the Mg3AlNi2 compound (Ti2Ni-type structure) are investigated and compared with the properties of Mg3MNi2 (M = Mn, Ti) isostructural compounds. The sorption-desorption of hydrogen by Mg(88)M4Ni(8) (M = Al, Mn, Ti) alloys is studied. The catalytic influence of Mg3MNi2 ternary phases on the hydrogenation of magnesium is established.
C1 [Berezovets', V. V.; Denys, R. V.; Zavalii, I. Yu] Ukrainian Natl Acad Sci, Karpenko Physicomech Inst, Lvov, Ukraine.
[Paul-Boncour, V.] CNRS, Inst Chim & Mat Paris Est, Thiais, France.
[Pecharsky, V.] Iowa State Univ, Ames Lab, Ames, IA USA.
RP Zavalii, IY (reprint author), Ukrainian Natl Acad Sci, Karpenko Physicomech Inst, Lvov, Ukraine.
EM zavaliy@ipm.lviv.ua
FU CRDF Foundation [UKC2-2970-LV-09]; Ukrainian National Academy of
Sciences "Hydrogen in Alternative Power Engineering and Novel
Technologies" [23-11]; U.S. Department of Energy [DE-AC02-07CH11358];
Iowa State University
FX The present work was supported by the CRDF Foundation (Grant No.
UKC2-2970-LV-09) and Special-Purpose Program of the Ukrainian National
Academy of Sciences "Hydrogen in Alternative Power Engineering and Novel
Technologies" (Grant No. 23-11). The work in the Ames Laboratory is
performed with support of the U.S. Department of Energy under Contract
No. DE-AC02-07CH11358 with Iowa State University.
NR 20
TC 1
Z9 1
U1 9
U2 29
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1068-820X
EI 1573-885X
J9 MATER SCI+
JI Mater. Sci.
PD SEP
PY 2013
VL 49
IS 2
BP 159
EP 169
DI 10.1007/s11003-013-9595-1
PG 11
WC Materials Science, Multidisciplinary
SC Materials Science
GA 268YU
UT WOS:000328207600003
ER
PT J
AU Pan, HL
Lu, X
Yu, XQ
Hu, YS
Li, H
Yang, XQ
Chen, LQ
AF Pan, Huilin
Lu, Xia
Yu, Xiqian
Hu, Yong-Sheng
Li, Hong
Yang, Xiao-Qing
Chen, Liquan
TI Sodium Storage and Transport Properties in Layered Na2Ti3O7 for
Room-Temperature Sodium-Ion Batteries
SO ADVANCED ENERGY MATERIALS
LA English
DT Article
DE sodium-ion batteries; Na2Ti3O7; NaFSI; sodium storage and transport
ID AB-INITIO; ELECTRODE MATERIALS; RECHARGEABLE BATTERIES;
SOLID-ELECTROLYTE; ANODE MATERIAL; HIGH-CAPACITY; LITHIUM; NA; ENERGY;
PERFORMANCE
AB Layered sodium titanium oxide, Na2Ti3O7, is synthesized by a solid-state reaction method as a potential anode for sodium-ion batteries. Through optimization of the electrolyte and binder, the microsized Na2Ti3O7 electrode delivers a reversible capacity of 188 mA h g(-1) in 1 M NaFSI/PC electrolyte at a current rate of 0.1C in a voltage range of 0.0-3.0 V, with sodium alginate as binder. The average Na storage voltage plateau is found at ca. 0.3 V vs. Na+/Na, in good agreement with a first-principles prediction of 0.35 V. The Na storage properties in Na2Ti3O7 are investigated from thermodynamic and kinetic aspects. By reducing particle size, the nanosized Na2Ti3O7 exhibits much higher capacity, but still with unsatisfied cyclic properties. The solid-state interphase layer on Na2Ti3O7 electrode is analyzed. A zero-current overpotential related to thermodynamic factors is observed for both nano- and microsized Na2Ti3O7. The electronic structure, Na+ ion transport and conductivity are investigated by the combination of first-principles calculation and electrochemical characterizations. On the basis of the vacancy-hopping mechanism, a quasi-3D energy favorable trajectory is proposed for Na2Ti3O7. The Na+ ions diffuse between the TiO6 octahedron layers with pretty low activation energy of 0.186 eV.
C1 [Pan, Huilin; Lu, Xia; Hu, Yong-Sheng; Li, Hong; Chen, Liquan] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing Key Lab New Energy Mat & Devices,Key Lab, Beijing 100190, Peoples R China.
[Yu, Xiqian; Yang, Xiao-Qing] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Hu, YS (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing Key Lab New Energy Mat & Devices,Key Lab, Beijing 100190, Peoples R China.
EM yshu@aphy.iphy.ac.cn
RI Lu, Xia/A-7848-2012; Li, Hong/C-4643-2008; Hu, Yong-Sheng/H-1177-2011;
Yu, Xiqian/B-5574-2014; Pan, Huilin/J-9298-2016
OI Lu, Xia/0000-0003-3504-9069; Li, Hong/0000-0002-8659-086X; Hu,
Yong-Sheng/0000-0002-8430-6474; Yu, Xiqian/0000-0001-8513-518X;
FU NSFC [51222210, 11234013]; "863" Project [2009AA033101]; "973" Projects
[2009CB220104]; CAS project [KJCX2-YW-W26]; Chinese Academy of Sciences;
US-DOE [DEAC02-98CH10886]
FX We thank Y. Sun for providing the fullprof facilitate. This work was
supported by funding from the NSFC (51222210, 11234013), "863" Project
(2009AA033101), "973" Projects (2009CB220104), CAS project
(KJCX2-YW-W26), One Hundred Talent Project of the Chinese Academy of
Sciences, and US-DOE (DEAC02-98CH10886). The authors are grateful for
the technical support of Dr Jianming Bai for the XRD studies at the X14A
beamline of NSLS (BNL).
NR 64
TC 152
Z9 153
U1 47
U2 384
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1614-6832
EI 1614-6840
J9 ADV ENERGY MATER
JI Adv. Energy Mater.
PD SEP
PY 2013
VL 3
IS 9
BP 1186
EP 1194
DI 10.1002/aenm.201300139
PG 9
WC Chemistry, Physical; Energy & Fuels; Materials Science,
Multidisciplinary; Physics, Applied; Physics, Condensed Matter
SC Chemistry; Energy & Fuels; Materials Science; Physics
GA 263PT
UT WOS:000327821200013
ER
PT J
AU Wei, XL
Nie, ZM
Luo, QT
Li, B
Chen, BW
Simmons, K
Sprenkle, V
Wang, W
AF Wei, Xiaoliang
Nie, Zimin
Luo, Qingtao
Li, Bin
Chen, Baowei
Simmons, Kevin
Sprenkle, Vincent
Wang, Wei
TI Nanoporous Polytetrafl uoroethylene/Silica Composite Separator as a
High-Performance All-Vanadium Redox Flow Battery Membrane
SO ADVANCED ENERGY MATERIALS
LA English
DT Article
DE all-vanadium redox flow batteries; membrane; nanoporous separator;
polytetrafluoroethylene; silica particles
ID RESEARCH-AND-DEVELOPMENT; ENERGY-STORAGE; PROGRESS; STABILITY
AB A novel low-cost nanoporous polytetrafluoroethylene (PTFE)/silica composite separator has been prepared and evaluated for its use in an all-vanadium redox flow battery (VRB). The separator consists of silica particles enmeshed in a PTFE fibril matrix. It possesses unique nanoporous structures with an average pore size of 38 nm and a porosity of 48%. These pores function as the ion transport channels during redox flow battery operation. This separator provides excellent electrochemical performance in the mixed-acid VRB system. The VRB using this separator delivers impressive energy efficiency, rate capability, and temperature tolerance. In additon, the flow cell using the novel separator also demonstrates an exceptional capacity retention capability over extended cycling, thus offering excellent stability for long-term operation. The characteristics of low cost, excellent electrochemical performance and proven chemical stability afford the PTFE/silica nanoporous separator great potential as a substitute for the Nafion membrane used in VRB applications.
C1 [Wei, Xiaoliang; Nie, Zimin; Luo, Qingtao; Li, Bin; Chen, Baowei; Simmons, Kevin; Sprenkle, Vincent; Wang, Wei] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Wang, W (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA.
EM wei.wang@pnnl.gov
RI Wang, Wei/F-4196-2010
OI Wang, Wei/0000-0002-5453-4695
FU U.S. Department of Energy's (DOE's) Office of Electricity Delivery and
Energy Reliability [57558]; DOE [DE-AC05-76RL01830]
FX The authors would like to acknowledge financial support from the U.S.
Department of Energy's (DOE's) Office of Electricity Delivery and Energy
Reliability (OE) (under Contract No. 57558). We also are grateful for
useful discussions with Dr. Imre Gyuk of the DOE-OE Grid Storage
Program. PNNL is a multi-program national laboratory operated by
Battelle for DOE under Contract DE-AC05-76RL01830.
NR 32
TC 48
Z9 48
U1 19
U2 92
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1614-6832
EI 1614-6840
J9 ADV ENERGY MATER
JI Adv. Energy Mater.
PD SEP
PY 2013
VL 3
IS 9
BP 1215
EP 1220
DI 10.1002/aenm.201201112
PG 6
WC Chemistry, Physical; Energy & Fuels; Materials Science,
Multidisciplinary; Physics, Applied; Physics, Condensed Matter
SC Chemistry; Energy & Fuels; Materials Science; Physics
GA 263PT
UT WOS:000327821200017
ER
PT J
AU Pustelny, S
Kimball, DFJ
Pankow, C
Ledbetter, MP
Wlodarczyk, P
Wcislo, P
Pospelov, M
Smith, JR
Read, J
Gawlik, W
Budker, D
AF Pustelny, Szymon
Kimball, Derek F. Jackson
Pankow, Chris
Ledbetter, Micah P.
Wlodarczyk, Przemyslaw
Wcislo, Piotr
Pospelov, Maxim
Smith, Joshua R.
Read, Jocelyn
Gawlik, Wojciech
Budker, Dmitry
TI The Global Network of Optical Magnetometers for Exotic physics (GNOME):
A novel scheme to search for physics beyond the Standard Model
SO ANNALEN DER PHYSIK
LA English
DT Article
ID INVISIBLE AXION; ATOMIC MAGNETOMETER; PARTICLE PHYSICS; LIMITS
AB A novel experimental scheme enabling the investigation of transient exotic spin couplings is discussed. The scheme is based on synchronous measurements of optical-magnetometer signals from several devices operating in magnetically shielded environments in distant locations ( 100 km). Although signatures of such exotic couplings may be present in the signal from a single magnetometer, it would be challenging to distinguish them from noise. By analyzing the correlation between signals from multiple, geographically separated magnetometers, it is not only possible to identify the exotic transient but also to investigate its nature. The ability of the network to probe presently unconstrained physics beyond the Standard Model is examined by considering the spin coupling to stable topological defects (e.g., domain walls) of axion-like fields. In the spirit of this research, a brief (approximate to 2 hours) demonstration experiment involving two magnetometers located in Krakow and Berkeley (approximate to 9000 km separation) is presented and discussion of the data-analysis approaches that may allow identification of transient signals is provided. The prospects of the network are outlined in the last part of the paper.
C1 [Pustelny, Szymon; Wcislo, Piotr; Gawlik, Wojciech] Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland.
[Pustelny, Szymon; Ledbetter, Micah P.; Budker, Dmitry] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Kimball, Derek F. Jackson] Calif State UniversityEast Bay, Dept Phys, Hayward, CA 94542 USA.
[Pankow, Chris] Univ Wisconsin, Dept Phys, Ctr Gravitat Cosmol & Astrophys, Milwaukee, WI 53211 USA.
[Wlodarczyk, Przemyslaw] AGH Univ Sci & Technol, Dept Elect, PL-30059 Krakow, Poland.
[Wcislo, Piotr] Nicholas Copernicus Univ, Inst Phys, Fac Phys Astron & Informat, PL-87100 Torun, Poland.
[Pospelov, Maxim] Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 1A1, Canada.
[Pospelov, Maxim] Perimeter Inst Theoret Phys, Waterloo, ON N2J 2W9, Canada.
[Smith, Joshua R.; Read, Jocelyn] Calif State Univ Fullerton, Dept Phys, Gravitat Wave Phys & Astron Ctr, Fullerton, CA 92831 USA.
[Budker, Dmitry] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
RP Pustelny, S (reprint author), Jagiellonian Univ, Inst Phys, Reymonta 4, PL-30059 Krakow, Poland.
EM pustelny@uj.edu.pl
RI Wcislo, Piotr/C-9562-2015; Budker, Dmitry/F-7580-2016
OI Wcislo, Piotr/0000-0001-7909-4473; Budker, Dmitry/0000-0002-7356-4814
FU Miller Institute for Basic Research in Science; National Science
Foundation [PHY-0969666, PHY-1068875, PHY-0970074, PHY-0970147]; "Team"
Program of the Foundation for the Polish Science
FX The authors are thankful to S. Bale, J. Clarke, S. Rajendran, M.
Romalis, A. Sushkov, and M. Zolotorev for useful discussions. S.P. is a
scholar of the Polish Ministry of Science and Higher Education within
the Mobility Plus Program. D.B. acknowledges the support by the Miller
Institute for Basic Research in Science. This work has been supported in
part by the National Science Foundation under grants: PHY-0969666,
PHY-1068875, PHY-0970074, PHY-0970147, and the "Team" Program of the
Foundation for the Polish Science.
NR 63
TC 17
Z9 17
U1 3
U2 17
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 0003-3804
EI 1521-3889
J9 ANN PHYS-BERLIN
JI Ann. Phys.-Berlin
PD SEP
PY 2013
VL 525
IS 8-9
SI SI
BP 659
EP 670
DI 10.1002/andp.201300061
PG 12
WC Physics, Multidisciplinary
SC Physics
GA 263PB
UT WOS:000327819400016
ER
PT J
AU Ahrenkiel, RK
AF Ahrenkiel, Richard K.
TI Resonant coupling for contactless measurement of carrier lifetime (vol
31, 04D113, 2013)
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Correction
C1 Natl Renewable Energy Lab, Measurement & Characterizat Ctr, Golden, CO 80401 USA.
RP Ahrenkiel, RK (reprint author), Natl Renewable Energy Lab, Measurement & Characterizat Ctr, 15013 Denver West Pkwy, Golden, CO 80401 USA.
NR 2
TC 0
Z9 0
U1 1
U2 1
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD SEP
PY 2013
VL 31
IS 5
AR 053401
DI 10.1116/1.4819876
PG 1
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 261ZE
UT WOS:000327702800031
ER
PT J
AU Chin, ML
Periasamy, P
O'Regan, TP
Amani, M
Tan, C
O'Hayre, RP
Berry, JJ
Osgood, RM
Parilla, PA
Ginley, DS
Dubey, M
AF Chin, Matthew L.
Periasamy, Prakash
O'Regan, Terrance P.
Amani, Matin
Tan, Cheng
O'Hayre, Ryan P.
Berry, Joseph J.
Osgood, Richard M., III
Parilla, Philip A.
Ginley, David S.
Dubey, Madan
TI Planar metal-insulator-metal diodes based on the Nb/Nb2O5/X material
system
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article
ID ELECTRODES; FILM; RADIATION; ELEMENTS
AB The authors report the performance of various planar metal-insulator-metal (MIM) tunneling diodes, which are being investigated for use in rectenna devices for energy harvesting applications. Six cathode materials (M-2): Nb, Ag, Cu, Ni, Au, and Pt are studied in conjunction with Nb as the anode (M-1) and Nb2O5 (I) as the dielectric. The cathode materials selections were based on results from a prior rapid-screening study that employed a bent-wire metal cathode point-contact method. Planar devices, to enable analysis using standard MIM diode models, were fabricated with the resultant current density-voltage data obtained at both room temperature and 77K. The tunnel barrier heights and dielectric properties for these systems were extracted from the modeling results. Nb/Nb2O5/Pt MIM diodes showed the best performance with an asymmetry ratio greater than 7700, a nonlinearity value of 4.7, and a responsivity of 16.9, all at 0.5V and 300 K. These results confirm prior rapid-screening efforts and further validate the Nb/Nb2O5/Pt system in particular as a promising MIM architecture due to the low barrier height of the junction. (C) 2013 American Vacuum Society.
C1 [Chin, Matthew L.; O'Regan, Terrance P.; Amani, Matin; Tan, Cheng; Dubey, Madan] US Army Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USA.
[Periasamy, Prakash; O'Hayre, Ryan P.] Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 USA.
[Berry, Joseph J.; Parilla, Philip A.; Ginley, David S.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Osgood, Richard M., III] US Army Natick Soldier Res Dev & Engn Ctr, Natick, MA 01760 USA.
RP Chin, ML (reprint author), US Army Res Lab, Sensors & Electron Devices Directorate, 2800 Powder Mill Rd, Adelphi, MD 20783 USA.
EM matthew.l.chin2.civ@mail.mil
FU U.S. Department of Energy [DE-AC36-08-GO28308]; National Renewable
Energy Laboratory, as part of the Laboratory Directed Research and
Development Program; Centre for Revolutionary Solar Photoconversion
(CRSP); Army Research Office [W911NF-12-1-0474]
FX This work was supported by the U.S. Department of Energy under Contract
No. DE-AC36-08-GO28308 with the National Renewable Energy Laboratory, as
part of the Laboratory Directed Research and Development Program and was
also supported by funding from the Centre for Revolutionary Solar
Photoconversion (CRSP). Part of this work is supported by funding from
Army Research Office under Contract No. W911NF-12-1-0474. The authors
thank Harvey Guthrey and Brian Gorman at CSM for their help in obtaining
TEM images.
NR 26
TC 3
Z9 3
U1 3
U2 13
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD SEP
PY 2013
VL 31
IS 5
AR 051204
DI 10.1116/1.4818313
PG 8
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 261ZE
UT WOS:000327702800012
ER
PT J
AU Hwang, YH
Liu, L
Velez, C
Ren, F
Gila, BP
Hays, D
Pearton, SJ
Lambers, E
Kravchenko, II
Lo, CF
Johnson, JW
AF Hwang, Ya-Hsi
Liu, Lu
Velez, Camilo
Ren, Fan
Gila, Brent P.
Hays, David
Pearton, Stephen J.
Lambers, Eric
Kravchenko, Ivan I.
Lo, Chien-Fong
Johnson, Jerry W.
TI GaN metal-insulator-semiconductor high-electron-mobility transistor with
plasma enhanced atomic layer deposited AlN as gate dielectric and
passivation
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article
ID FIELD-EFFECT TRANSISTORS; ALGAN/GAN HEMTS; THIN-FILM; AL2O3; OXIDE
AB AlGaN/GaN based metal-insulator-semiconductor high-electron-mobility transistors (HEMTs) using a plasma enhanced atomic layer deposited 10 nm AlN as the gate insulator and passivation layer were demonstrated. A refractive index of 1.92 for the deposited AlN was measured using an ellipsometer, which was slightly lower than that of bulk AlN. The deviation of the refractive index from the ideal value was caused by AlN surface oxidation, and this was confirmed by X-ray photoelectron spectroscopy and Auger depth profiling analyses. The HEMT drain current was modulated with gate voltages ranging from -3 to +4V. The HEMT exhibited an on-off ratio of 3.3 x 10(8) due to the low gate leakage current and a maximum saturation drain current of 600 mA/mm. Beside reducing the gate leakage current, the effectiveness of the HEMT passivation was confirmed by gate pulse measurements, which showed only a 7% decrease of the drain current. (C) 2013 American Vacuum Society.
C1 [Hwang, Ya-Hsi; Liu, Lu; Velez, Camilo; Ren, Fan] Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA.
[Gila, Brent P.; Hays, David; Pearton, Stephen J.; Lambers, Eric] Univ Florida, Gainesville, FL 32611 USA.
[Kravchenko, Ivan I.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37830 USA.
[Lo, Chien-Fong; Johnson, Jerry W.] IQE, Taunton, MA 02780 USA.
RP Hwang, YH (reprint author), Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA.
EM fren@che.ufl.edu
RI Kravchenko, Ivan/K-3022-2015
OI Kravchenko, Ivan/0000-0003-4999-5822
FU AFOSR MURI; Office of Basic Energy Sciences, U.S. Department of Energy
FX This work was supported by an AFOSR MURI monitored by Jim Hwang. A
portion of this research was conducted at the Center for Nanophase
Materials Sciences, which is sponsored at Oak Ridge National Laboratory
by the Office of Basic Energy Sciences, U.S. Department of Energy.
NR 28
TC 2
Z9 2
U1 2
U2 18
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD SEP
PY 2013
VL 31
IS 5
AR 052201
DI 10.1116/1.4816477
PG 4
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 261ZE
UT WOS:000327702800027
ER
PT J
AU Sheng, JJ
Leonhardt, D
Han, SM
Johnston, SW
Cederberg, JG
Carroll, MS
AF Sheng, Josephine J.
Leonhardt, Darin
Han, Sang M.
Johnston, Steven W.
Cederberg, Jeffrey G.
Carroll, Malcolm S.
TI Empirical correlation for minority carrier lifetime to defect density
profile in germanium on silicon grown by nanoscale interfacial
engineering
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article
ID THREADING-DISLOCATION DENSITIES; MOLECULAR-BEAM EPITAXY;
CHEMICAL-VAPOR-DEPOSITION; HIGH-QUALITY GE; LATERAL OVERGROWTH; SI;
GAAS; HETEROEPITAXY; INTEGRATION; SI(100)
AB High-quality Ge-on-Si heterostructures have been explored for many applications, including near infrared photodetectors and integration with III-V films for multijunction photovoltaics. However, the lattice mismatch between Ge and Si often leads to a high density of defects. Introducing annealing steps prior to and after full Ge island coalescence is found to reduce the defect density. The defect density in Ge is also found to decrease with increasing dopant density in Si substrates, likely due to the defect pinning near the Ge-Si interface by dopants. The authors establish an empirical correlation between the minority carrier lifetime (tau(G)) and the defect density in the Ge film (rho(D)) as a function of distance from the Ge-Si interface: tau(Ge) = C/rho(D), where C is a proportionality constant and a fitting parameter which is determined to be 0.17 and 0.22 s/cm(2) for Ge films grown on low-doped, high-resistivity Si substrates and high-doped, low-resistivity Si substrates, respectively. The effective minority carrier lifetime measured as a function of Ge film thickness is then related to the recombination velocity on Ge film surface, average minority carrier lifetime within Ge film, and recombination velocity at the Ge-Si interface. Using this relation, the authors estimate the Ge-Si interface recombination velocity for Ge films grown on low-doped, high-resistivity and high-doped, low-resistivity Si substrates to be 220 and 100 cm/s, respectively. (C) 2013 American Vacuum Society.
C1 [Sheng, Josephine J.; Leonhardt, Darin; Han, Sang M.] Univ New Mexico, Albuquerque, NM 87131 USA.
[Johnston, Steven W.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Cederberg, Jeffrey G.; Carroll, Malcolm S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Sheng, JJ (reprint author), Univ New Mexico, Albuquerque, NM 87131 USA.
EM meister@unm.edu
FU National Science Foundation [DMR-0907112, CMMI1068970]
FX This work was supported by the National Science Foundation under Awards
DMR-0907112 and CMMI1068970.
NR 59
TC 4
Z9 4
U1 1
U2 9
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD SEP
PY 2013
VL 31
IS 5
AR 051201
DI 10.1116/1.4816488
PG 8
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 261ZE
UT WOS:000327702800009
ER
PT J
AU Crease, RP
AF Crease, Robert P.
TI Critical Point Dramatizing science
SO PHYSICS WORLD
LA English
DT Editorial Material
C1 [Crease, Robert P.] SUNY Stony Brook, Dept Philosophy, Stony Brook, NY USA.
[Crease, Robert P.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Crease, RP (reprint author), SUNY Stony Brook, Dept Philosophy, Stony Brook, NY USA.
EM robert.crease@stonybrook.edu
NR 0
TC 0
Z9 0
U1 1
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8585
J9 PHYS WORLD
JI Phys. World
PD SEP
PY 2013
VL 26
IS 9
BP 19
EP 19
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 266ZQ
UT WOS:000328063800018
ER
PT J
AU Hooper, D
AF Hooper, Dan
TI Revisiting XENON100's constraints (and signals?) for low-mass dark
matter
SO JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
LA English
DT Article
DE dark matter experiments; dark matter theory
ID 730 KG DAYS; SEARCH
AB Although observations made with the CoGeNT and CDMS experiments have been interpreted as possible signals of low-mass (similar to 7-10 GeV) dark matter particles, constraints from the XENON100 collaboration appear to be incompatible with this hypothesis, at least at face value. In this paper, we revisit XENON100's constraint on dark matter in this mass range, and consider how various uncertainties and assumptions made might alter this conclusion. We also note that while XENON100's two nuclear recoil candidates each exhibit very low ratios of ionization-to-scintillation signals, making them difficult to attribute to known electronic or neutron backgrounds, they are consistent with originating from dark matter particles in the mass range favored by CoGeNT and CDMS. We argue that with lower, but not implausible, values for the relative scintillation efficiency of liquid xenon (L-eff), and the suppression of the scintillation signal in liquid xenon at XENON100's electric field (S-nr), these two events could consistently arise from dark matter particles with a mass and cross section in the range favored by CoGeNT and CDMS. If this interpretation is correct, we predict that the LUX experiment, with a significantly higher light yield than XENON100, should observe dark matter induced events at an observable rate of similar to 3-24 per month.
C1 [Hooper, Dan] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
[Hooper, Dan] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
RP Hooper, D (reprint author), Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, POB 500, Batavia, IL 60510 USA.
EM dhooper@fnal.gov
FU US Department of Energy
FX We would like to thank Matthew Szydagis, Eric Dahl, Nicole Fields,
Lauren Hsu, Rafael Lang, Dan McKinsey, Peter Sorensen, Andrew
Sonnenschein, and Juan Collar for helpful discussions. We would also
like to thank the XENON100, CoGeNT and CDMS collaborations for providing
many of the parameter regions and data points shown in the figures
throughout this paper. This work has been supported by the US Department
of Energy.
NR 66
TC 10
Z9 10
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1475-7516
J9 J COSMOL ASTROPART P
JI J. Cosmol. Astropart. Phys.
PD SEP
PY 2013
IS 9
AR 035
DI 10.1088/1475-7516/2013/09/035
PG 19
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 250BU
UT WOS:000326826000035
ER
PT J
AU Irsic, V
Slosar, A
Bailey, S
Eisenstein, DJ
Font-Ribera, A
Le Goff, JM
Lundgren, B
McDonald, P
O'Connell, R
Palanque-Delabrouille, N
Petitjean, P
Rich, J
Rossi, G
Schneider, DP
Sheldon, ES
Yeche, C
AF Irsic, Vid
Slosar, Anze
Bailey, Stephen
Eisenstein, Daniel J.
Font-Ribera, Andreu
Le Goff, Jean-Marc
Lundgren, Britt
McDonald, Patrick
O'Connell, Ross
Palanque-Delabrouille, Nathalie
Petitjean, Patrick
Rich, Jim
Rossi, Graziano
Schneider, Donald P.
Sheldon, Erin S.
Yeche, Christophe
TI Detection of Ly beta auto-correlations and Ly alpha-Ly beta
cross-correlations in BOSS Data Release 9
SO JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
LA English
DT Article
DE Lyman alpha forest; intergalactic media; dark energy experiments; cosmic
web
ID DIGITAL SKY SURVEY; OSCILLATION SPECTROSCOPIC SURVEY; POWER SPECTRUM;
SDSS-III; TRANSMITTED FLUX; TARGET SELECTION; FOREST; CONSTRAINTS;
TELESCOPE; QUASARS
AB The Lyman-beta forest refers to a region in the spectra of distant quasars that lies between the rest-frame Lyman-beta and Lyman-gamma emissions. The forest in this region is dominated by a combination of absorption due to resonant Ly alpha and Ly beta scattering. When considering the 1D Ly beta forest in addition to the 1D Lya forest, the full statistical description of the data requires four 1D power spectra: Lya and Ly beta auto-power spectra and the Ly alpha-Ly beta real and imaginary cross-power spectra. We describe how these can be measured using an optimal quadratic estimator that naturally disentangles Ly alpha and Ly beta contributions. Using a sample of approximately 60,000 quasar sight-lines from the BOSS Data Release 9, we make the measurement of the one-dimensional power spectrum of fluctuations due to the Ly beta resonant scattering. While we have not corrected our measurements for resolution damping of the power and other systematic effects carefully enough to use them for cosmological constraints, we can robustly conclude the following: i) Ly beta power spectrum and Ly alpha-Ly beta cross spectra are detected with high statistical significance; ii) the cross-correlation coefficient is approximate to 1 on large scales; iii) the Ly beta measurements are contaminated by the associated OVI absorption, which is analogous to the SiIII contamination of the Ly alpha forest. Measurements of the Ly beta forest will allow extension of the usable path-length for the Ly alpha measurements while allowing a better understanding of the physics of intergalactic medium and thus more robust cosmological constraints.
C1 [Irsic, Vid] Univ Ljubljana, Fac Math & Phys, Ljubljana 1000, Slovenia.
[Slosar, Anze; Sheldon, Erin S.] Brookhaven Natl Lab, Upton, NY 11375 USA.
[Bailey, Stephen; Font-Ribera, Andreu; McDonald, Patrick] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Eisenstein, Daniel J.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Font-Ribera, Andreu] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland.
[Le Goff, Jean-Marc; Palanque-Delabrouille, Nathalie; Rich, Jim; Rossi, Graziano; Yeche, Christophe] CEA, Ctr Saclay, IRFU, F-91191 Gif Sur Yvette, France.
[Lundgren, Britt] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA.
[O'Connell, Ross] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA.
[Petitjean, Patrick] Univ Paris 06, F-75014 Paris, France.
[Petitjean, Patrick] Inst Astrophys Paris, CNRS, UMP7095, F-75014 Paris, France.
[Schneider, Donald P.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Schneider, Donald P.] Penn State Univ, Inst Gravitat & Cosmos, Davey Lab 525, University Pk, PA 16802 USA.
RP Irsic, V (reprint author), Univ Ljubljana, Fac Math & Phys, Jadranska 19, Ljubljana 1000, Slovenia.
EM vid.irsic@fmf.uni-lj.si; anze@bnl.gov; stephenbailey@lbl.gov;
deisenstein@cfa.harvard.edu; font@physik.uzh.ch; jmlegoff@cea.fr;
lundgren@astro.wisc.ed; pvmcdonald@lbl.gov; rcoconne@andrew.cmu.edu;
nathalie.palanque-delabrouille@cea.fr; ppetitje@iap.fr;
james.rich@cea.fr; graziano.rossi@cea.fr; dps7@psu.edu;
esheldon@bnl.gov; christophe.yeche@cea.fr
OI Irsic, Vid/0000-0002-5445-461X
FU Alfred P. Sloan Foundation; National Science Foundation; U.S. Department
of Energy Office of Science
FX Funding for SDSS-III has been provided by the Alfred P. Sloan
Foundation, the Participating Institutions, the National Science
Foundation, and the U.S. Department of Energy Office of Science. The
SDSS-III web site is http : //www.sdps3.org/.
NR 43
TC 3
Z9 3
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1475-7516
J9 J COSMOL ASTROPART P
JI J. Cosmol. Astropart. Phys.
PD SEP
PY 2013
IS 9
AR 016
DI 10.1088/1475-7516/2013/09/016
PG 22
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 250BU
UT WOS:000326826000016
ER
PT J
AU Alexander, FJ
AF Alexander, Francis J.
TI Machine Learning GUEST EDITOR'S INTRODUCTION
SO COMPUTING IN SCIENCE & ENGINEERING
LA English
DT Editorial Material
C1 [Alexander, Francis J.] Los Alamos Natl Lab, Comp Computat & Stat Sci Div, Los Alamos, NM 87545 USA.
[Alexander, Francis J.] Los Alamos Natl Lab, Informat Sci & Technol Inst, Los Alamos, NM 87545 USA.
RP Alexander, FJ (reprint author), Los Alamos Natl Lab, Comp Computat & Stat Sci Div, Los Alamos, NM 87545 USA.
EM fja@lanl.gov
NR 9
TC 4
Z9 4
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 1521-9615
EI 1558-366X
J9 COMPUT SCI ENG
JI Comput. Sci. Eng.
PD SEP-OCT
PY 2013
VL 15
IS 5
BP 9
EP 11
PG 3
WC Computer Science, Interdisciplinary Applications
SC Computer Science
GA 251AU
UT WOS:000326901000002
ER
PT J
AU Porter, R
Theiler, J
Hush, D
AF Porter, Reid
Theiler, James
Hush, Don
TI Interactive Machine Learning in Data Exploitation
SO COMPUTING IN SCIENCE & ENGINEERING
LA English
DT Article
ID CLASSIFICATION
AB The goal of interactive machine learning is to help scientists and engineers exploit more specialized data from within their deployed environment in less time, with greater accuracy and fewer costs. A basic introduction to the main components is provided here, untangling the many ideas that must be combined to produce practical interactive learning systems.
C1 [Porter, Reid; Theiler, James] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Porter, R (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM rporter@lanl.gov; jtheller@lanl.gov; dhush@lanl.gov
NR 18
TC 4
Z9 4
U1 0
U2 4
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 1521-9615
EI 1558-366X
J9 COMPUT SCI ENG
JI Comput. Sci. Eng.
PD SEP-OCT
PY 2013
VL 15
IS 5
BP 12
EP 20
PG 9
WC Computer Science, Interdisciplinary Applications
SC Computer Science
GA 251AU
UT WOS:000326901000003
ER
PT J
AU Pappas, MJ
Congdon, JD
Brecke, BJ
Freedberg, S
AF Pappas, Michael J.
Congdon, Justin D.
Brecke, Bruce J.
Freedberg, Steven
TI ORIENTATION OF FRESHWATER HATCHLING BLANDING'S (EMYDOIDEA BLANDINGII)
AND SNAPPING TURTLES (CHELYDRA SERPENTINA) DISPERSING FROM EXPERIMENTAL
NESTS IN AGRICULTURAL FIELDS
SO HERPETOLOGICAL CONSERVATION AND BIOLOGY
LA English
DT Article
DE Chelydra serpentina; compass; crop fields; dispersal from nests;
Emydoidea blandingii; hatchling freshwater turtles; orientation
ID SUN-COMPASS ORIENTATION; CHRYSEMYS-PICTA; GLYPTEMYS-INSCULPTA; BREEDING
AMPHIBIANS; TERRAPENE-CAROLINA; CHELONIA-MYDAS; BEHAVIOR; CONSERVATION;
POPULATIONS; MOVEMENTS
AB Tilled crop fields and natural nesting areas of many freshwater turtles have common characteristics that attract nesting females, but as some crops mature, their canopies block access to natural environmental cues used by hatchlings during orientation and dispersal from nests. we examined orientation of 417 naive and 232 experienced hatchling Blanding's turtles (Emydoidea blandingii) and snapping turtles (Chelydra serpentina) during dispersal from experimental nests in three 60-m square arenas located in soybean and corn fields or by tracking re-located experienced hatchlings in a corn field at weaver dunes, Minnesota, USA. for both species, orientation patterns of nave hatchlings in crop fields were primarily random (indicating no environmental cues were available) and secondarily bimodal in both directions of crop row alignment (a dispersal pattern consistent with following paths of least resistance). in contrast to nave individuals, dispersal patterns of natural-experienced hatchling Blanding's turtles were non-random, not in the direction of crop row alignment, and in the directions they had been moving prior to being released in crop fields. hatchling Blanding's and snapping turtles with 45-150 minutes dispersal experience at different times of day in a prairie arena were able to disperse directionally when re-released in a corn plot, a result that supports rapid development of a compass for maintaining headings when targets are not visible. morning-and afternoon-experienced hatchling Blanding's turtles dispersed in different directions in a corn plot and in a different direction or pattern (random versus directional) from their previous dispersal in the prairie arena. the results of our study indicate that mature crop canopies that block access to natural environmental cues used for dispersal from nests pose more substantial orientation problems for naive hatchlings than for experienced hatchlings that are able to use a compass to maintain dispersal headings when environmental cues are not available.
C1 [Pappas, Michael J.] Michaels Restaurant, Rochester, MN 55904 USA.
[Congdon, Justin D.] Savannah River Ecol Lab, Aiken, SC 29802 USA.
[Congdon, Justin D.] Bar Boot Ranch, Douglas, AZ 85608 USA.
[Freedberg, Steven] St Olaf Coll, Dept Biol, Northfield, MN 55057 USA.
RP Congdon, JD (reprint author), Savannah River Ecol Lab, Aiken, SC 29802 USA.
EM michael@michaelsfinedining.com; congdon@vtc.net;
dipsochelys_013@yahoo.com; freedber@stolaf.edu
FU Office of Biological and Environmental Research, U.S. Department of
Energy [DE-FC09-96SR18546]
FX We thank the following people for helping with the research reported in
this paper: (1) landowners Ray and Evie Brueske, Bill and Pat Edelbach,
Eugene Lamey, and Lester "Junior" Schmoker who allowed us access to
their crop fields; (2) Joshua Capps, Nancy Dickson, Richard van Loben
Sels, Carolina Pappas, and St. Olaf's College students (Allison
Christiaansen, Allison Johnson, and Chee Lee) for help with monitoring
the arenas; (3) Larry Gates, Larry Gusa, Allison, Alyssa and Michael
Pappas II, and John Schmoker for help with collection and incubation of
eggs; and (4) Janet Hostetter for photographing some of the field work.
The study was conducted under permits from Richard Baker, Jaime Edwards,
Nick Gulden, Gary Nelson, and Don Ramsden of the Minnesota Department of
Natural Resources (#13808, and #15422), Mary Stefanski of the U.S. Fish
and Wildlife Service (permit #08007), and from Meredith Cornett and Rich
Biske of The Nature Conservancy (permit #2007-17R). Improvements of
earlier drafts of the manuscript are the results of comments from Nancy
Dickson, Janet Hostetter, and on the submitted draft by John Iverson.
Research and manuscript preparation were aided by the Office of
Biological and Environmental Research, U.S. Department of Energy through
Financial Assistant Award No. DE-FC09-96SR18546 to the University of
Georgia Research Foundation and by the Savannah River Ecology
Laboratory.
NR 34
TC 3
Z9 3
U1 3
U2 21
PU HERPETOLOGICAL CONSERVATION & BIOLOGY
PI CORVALLIS
PA C/O R BRUCE BURY, USGS FOREST & RANGELAND, CORVALLIS, OR 00000 USA
SN 2151-0733
EI 1931-7603
J9 HERPETOL CONSERV BIO
JI Herpetol. Conserv. Biol.
PD SEP
PY 2013
VL 8
IS 2
BP 385
EP 399
PG 15
WC Zoology
SC Zoology
GA 257AH
UT WOS:000327354800011
ER
PT J
AU Adloff, C
Blaising, JJ
Chefdeville, M
Drancourt, C
Gaglione, R
Geffroy, N
Karyotakis, Y
Koletsou, I
Prast, J
Vouters, G
Francis, K
Repond, J
Schlereth, J
Smith, J
Xia, L
Baldolemar, E
Li, J
Park, ST
Sosebee, M
White, AP
Yu, J
Eigen, G
Mikami, Y
Watson, NK
Mavromanolakis, G
Thomson, MA
Ward, DR
Yan, W
Benchekroun, D
Hoummada, A
Khoulaki, Y
Apostolakis, J
Dannheim, D
Dotti, A
Folger, G
Ivantchenko, V
Klempt, W
van der Kraaij, E
Lucaci-Timoce, AI
Ribon, A
Schlatter, D
Uzhinskiy, V
Carloganu, C
Gay, P
Manen, S
Royer, L
Tytgat, M
Zaganidis, N
Blazey, GC
Dyshkant, A
Lima, JGR
Zutshi, V
Hostachy, JY
Morin, L
Cornett, U
David, D
Falley, G
Gadow, K
Gottlicher, P
Gunter, C
Hartbrich, O
Hermberg, B
Karstensen, S
Krivan, F
Kruger, K
Lu, S
Morozov, S
Morgunov, V
Reinecke, M
Sefkow, F
Smirnov, P
Terwort, M
Feege, N
Garutti, E
Laurien, S
Marchesini, I
Matysek, M
Ramilli, M
Briggl, K
Eckert, P
Harion, T
Schultz-Coulon, HC
Shen, W
Stamen, R
Bilki, B
Norbeck, E
Onel, Y
Wilson, GW
Kawagoe, K
Sudo, Y
Yoshioka, T
Dauncey, PD
Magnan, AM
Bartsch, V
Wing, M
Salvatore, F
Gil, EC
Mannai, S
Baulieu, G
Calabria, P
Caponetto, L
Combaret, C
Della Negra, R
Grenier, G
Han, R
Ianigro, JC
Kieffer, R
Laktineh, I
Lumb, N
Mathez, H
Mirabito, L
Petrukhin, A
Steen, A
Tromeur, W
Donckt, MV
Zoccarato, Y
Alamillo, EC
Fouz, MC
Puerta-Pelayo, J
Corriveau, F
Bobchenko, B
Chadeeva, M
Danilov, M
Epifantsev, A
Markin, O
Mizuk, R
Novikov, E
Popov, V
Rusinov, V
Tarkovsky, E
Kirikova, N
Kozlov, V
Smirnov, P
Soloviev, Y
Buzhan, P
Ilyin, A
Kantserov, V
Kaplin, V
Karakash, A
Popova, E
Tikhomirov, V
Kiesling, C
Seidel, K
Simon, F
Soldner, C
Szalay, M
Tesar, M
Weuste, L
Amjad, MS
Bonis, J
Callier, S
di Lorenzo, SC
Cornebise, P
Doublet, P
Dulucq, F
Fleury, J
Frisson, T
van der Kolk, N
Li, H
Martin-Chassard, G
Richard, F
de la Taille, C
Poschl, R
Raux, L
Rouene, J
Seguin-Moreau, N
Anduze, M
Balagura, V
Boudry, V
Brient, JC
Cornat, R
Frotin, M
Gastaldi, F
Guliyev, E
Haddad, Y
Magniette, F
Musat, G
Ruan, M
Tran, TH
Videau, H
Bulanek, B
Zacek, J
Cvach, J
Gallus, P
Havranek, M
Janata, M
Kvasnicka, J
Lednicky, D
Marcisovsky, M
Polak, I
Popule, J
Tomasek, L
Tomasek, M
Ruzicka, P
Sicho, P
Smolik, J
Vrba, V
Zalesak, J
Belhorma, B
Ghazlane, H
Kotera, K
Takeshita, T
Uozumi, S
Jeans, D
Gotze, M
Sauer, J
Weber, S
Zeitnitz, C
AF Adloff, C.
Blaising, J. -J.
Chefdeville, M.
Drancourt, C.
Gaglione, R.
Geffroy, N.
Karyotakis, Y.
Koletsou, I.
Prast, J.
Vouters, G.
Francis, K.
Repond, J.
Schlereth, J.
Smith, J.
Xia, L.
Baldolemar, E.
Li, J.
Park, S. T.
Sosebee, M.
White, A. P.
Yu, J.
Eigen, G.
Mikami, Y.
Watson, N. K.
Mavromanolakis, G.
Thomson, M. A.
Ward, D. R.
Yan, W.
Benchekroun, D.
Hoummada, A.
Khoulaki, Y.
Apostolakis, J.
Dannheim, D.
Dotti, A.
Folger, G.
Ivantchenko, V.
Klempt, W.
van der Kraaij, E.
Lucaci-Timoce, A. -I.
Ribon, A.
Schlatter, D.
Uzhinskiy, V.
Carloganu, C.
Gay, P.
Manen, S.
Royer, L.
Tytgat, M.
Zaganidis, N.
Blazey, G. C.
Dyshkant, A.
Lima, J. G. R.
Zutshi, V.
Hostachy, J. -Y.
Morin, L.
Cornett, U.
David, D.
Falley, G.
Gadow, K.
Goettlicher, P.
Guenter, C.
Hartbrich, O.
Hermberg, B.
Karstensen, S.
Krivan, F.
Krueger, K.
Lu, S.
Morozov, S.
Morgunov, V.
Reinecke, M.
Sefkow, F.
Smirnov, P.
Terwort, M.
Feege, N.
Garutti, E.
Laurien, S.
Marchesini, I.
Matysek, M.
Ramilli, M.
Briggl, K.
Eckert, P.
Harion, T.
Schultz-Coulon, H. -Ch.
Shen, W.
Stamen, R.
Bilki, B.
Norbeck, E.
Onel, Y.
Wilson, G. W.
Kawagoe, K.
Sudo, Y.
Yoshioka, T.
Dauncey, P. D.
Magnan, A. -M.
Bartsch, V.
Wing, M.
Salvatore, F.
Gil, E. Cortina
Mannai, S.
Baulieu, G.
Calabria, P.
Caponetto, L.
Combaret, C.
Della Negra, R.
Grenier, G.
Han, R.
Ianigro, J-C.
Kieffer, R.
Laktineh, I.
Lumb, N.
Mathez, H.
Mirabito, L.
Petrukhin, A.
Steen, A.
Tromeur, W.
Vander Donckt, M.
Zoccarato, Y.
Calvo Alamillo, E.
Fouz, M. -C.
Puerta-Pelayo, J.
Corriveau, F.
Bobchenko, B.
Chadeeva, M.
Danilov, M.
Epifantsev, A.
Markin, O.
Mizuk, R.
Novikov, E.
Popov, V.
Rusinov, V.
Tarkovsky, E.
Kirikova, N.
Kozlov, V.
Smirnov, P.
Soloviev, Y.
Buzhan, P.
Ilyin, A.
Kantserov, V.
Kaplin, V.
Karakash, A.
Popova, E.
Tikhomirov, V.
Kiesling, C.
Seidel, K.
Simon, F.
Soldner, C.
Szalay, M.
Tesar, M.
Weuste, L.
Amjad, M. S.
Bonis, J.
Callier, S.
di Lorenzo, S. Conforti
Cornebise, P.
Doublet, Ph.
Dulucq, F.
Fleury, J.
Frisson, T.
van der Kolk, N.
Li, H.
Martin-Chassard, G.
Richard, F.
de la Taille, Ch.
Poeschl, R.
Raux, L.
Rouene, J.
Seguin-Moreau, N.
Anduze, M.
Balagura, V.
Boudry, V.
Brient, J-C.
Cornat, R.
Frotin, M.
Gastaldi, F.
Guliyev, E.
Haddad, Y.
Magniette, F.
Musat, G.
Ruan, M.
Tran, T. H.
Videau, H.
Bulanek, B.
Zacek, J.
Cvach, J.
Gallus, P.
Havranek, M.
Janata, M.
Kvasnicka, J.
Lednicky, D.
Marcisovsky, M.
Polak, I.
Popule, J.
Tomasek, L.
Tomasek, M.
Ruzicka, P.
Sicho, P.
Smolik, J.
Vrba, V.
Zalesak, J.
Belhorma, B.
Ghazlane, H.
Kotera, K.
Takeshita, T.
Uozumi, S.
Jeans, D.
Goetze, M.
Sauer, J.
Weber, S.
Zeitnitz, C.
CA CALICE Collaboration
TI Track segments in hadronic showers in a highly granular
scintillator-steel hadron calorimeter
SO JOURNAL OF INSTRUMENTATION
LA English
DT Article
DE Calorimeters; Calorimeter methods; Detector modelling and simulations I
(interaction of radiation with matter, interaction of photons with
matter, interaction of hadrons with matter, etc); Analysis and
statistical methods
AB We investigate the three dimensional substructure of hadronic showers in the CAL-ICE scintillator-steel hadronic calorimeter. The high granularity of the detector is used to find track segments of minimum ionising particles within hadronic showers, providing sensitivity to the spatial structure and the details of secondary particle production in hadronic cascades. The multiplicity, length and angular distribution of identified track segments are compared to GEANT4 simulations with several different shower models. Track segments also provide the possibility for in-situ calibration of highly granular calorimeters.
C1 [Adloff, C.; Blaising, J. -J.; Chefdeville, M.; Drancourt, C.; Gaglione, R.; Geffroy, N.; Karyotakis, Y.; Koletsou, I.; Prast, J.; Vouters, G.] Univ Savoie, CNRS, IN2P3, Lab Annecy le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
[Francis, K.; Repond, J.; Schlereth, J.; Smith, J.; Xia, L.; Bilki, B.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Baldolemar, E.; Li, J.; Park, S. T.; Sosebee, M.; White, A. P.; Yu, J.] Univ Texas Arlington, Dept Phys, SH108, Arlington, TX 76019 USA.
[Eigen, G.] Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
[Mikami, Y.; Watson, N. K.] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England.
[Mavromanolakis, G.; Thomson, M. A.; Ward, D. R.; Yan, W.] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
[Benchekroun, D.; Hoummada, A.; Khoulaki, Y.] Univ Hassan II Ain Chock, Fac Sci, Casablanca, Morocco.
[Mavromanolakis, G.; Apostolakis, J.; Dannheim, D.; Dotti, A.; Folger, G.; Ivantchenko, V.; Klempt, W.; van der Kraaij, E.; Lucaci-Timoce, A. -I.; Ribon, A.; Schlatter, D.; Uzhinskiy, V.] CERN, CH-1211 Geneva 23, Switzerland.
[Carloganu, C.; Gay, P.; Manen, S.; Royer, L.] Univ Clermont Ferrand, Univ Blaise Pascal, CNRS IN2P3, LPC, F-63000 Clermont Ferrand, France.
[Tytgat, M.; Zaganidis, N.] Univ Ghent, Dept Phys & Astron, B-9000 Ghent, Belgium.
[Blazey, G. C.; Dyshkant, A.; Lima, J. G. R.; Zutshi, V.] No Illinois Univ, Dept Phys, NICADD, De Kalb, IL 60115 USA.
[Hostachy, J. -Y.; Morin, L.] Univ Grenoble 1, CNRS IN2P3, Inst Polytech Grenoble, Lab Phys Subatom & Cosmol, F-38026 Grenoble, France.
[Cornett, U.; David, D.; Falley, G.; Gadow, K.; Goettlicher, P.; Guenter, C.; Hartbrich, O.; Hermberg, B.; Karstensen, S.; Krivan, F.; Krueger, K.; Lu, S.; Morozov, S.; Morgunov, V.; Reinecke, M.; Sefkow, F.; Smirnov, P.; Terwort, M.; Marchesini, I.] DESY, D-22603 Hamburg, Germany.
[Feege, N.; Garutti, E.; Laurien, S.; Marchesini, I.; Matysek, M.; Ramilli, M.] Univ Hamburg, Dept Phys, Inst Expt Phys, D-22761 Hamburg, Germany.
[Briggl, K.; Eckert, P.; Harion, T.; Schultz-Coulon, H. -Ch.; Shen, W.; Stamen, R.] Heidelberg Univ, Fak Phys & Astron, D-69120 Heidelberg, Germany.
[Bilki, B.; Norbeck, E.; Onel, Y.] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA.
[Wilson, G. W.] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA.
[Kawagoe, K.; Sudo, Y.; Yoshioka, T.] Kyushu Univ, Dept Phys, Fukuoka 8128581, Japan.
[Dauncey, P. D.; Magnan, A. -M.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Dept Phys, London SW7 2AZ, England.
[Bartsch, V.; Wing, M.] UCL, Dept Phys & Astron, London WC1E 6BT, England.
[Salvatore, F.] Royal Holloway Univ London, Dept Phys, Egham TW20 0EX, Surrey, England.
[Gil, E. Cortina; Mannai, S.] Catholic Univ Louvain, Ctr Cosmol Particle Phys & Cosmol CP3, B-1320 Louvain, Belgium.
[Baulieu, G.; Calabria, P.; Caponetto, L.; Combaret, C.; Della Negra, R.; Grenier, G.; Han, R.; Ianigro, J-C.; Kieffer, R.; Laktineh, I.; Lumb, N.; Mathez, H.; Mirabito, L.; Petrukhin, A.; Steen, A.; Tromeur, W.; Vander Donckt, M.; Zoccarato, Y.] Univ Lyon 1, CNRS, IN2P3, IPNL, F-69622 Villeurbanne, France.
[Calvo Alamillo, E.; Fouz, M. -C.; Puerta-Pelayo, J.] Ctr Invest Energet Medioambientales & Tecnol, CIEMAT, Madrid, Spain.
[Corriveau, F.] Inst Particle Phys Canada, Montreal, PQ H3A 2T8, Canada.
[Corriveau, F.] Dept Phys, Montreal, PQ H3A 2T8, Canada.
[Bobchenko, B.; Chadeeva, M.; Danilov, M.; Epifantsev, A.; Markin, O.; Mizuk, R.; Novikov, E.; Popov, V.; Rusinov, V.; Tarkovsky, E.] Inst Theoret & Expt Phys, RU-117218 Moscow, Russia.
[Smirnov, P.; Kirikova, N.; Kozlov, V.; Soloviev, Y.] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, Russia.
[Buzhan, P.; Ilyin, A.; Kantserov, V.; Kaplin, V.; Karakash, A.; Popova, E.; Tikhomirov, V.] Moscow Phys Engn Inst, MEPhI, Dept Phys, Moscow 115409, Russia.
[Kiesling, C.; Seidel, K.; Simon, F.; Soldner, C.; Szalay, M.; Tesar, M.; Weuste, L.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Amjad, M. S.; Bonis, J.; Callier, S.; di Lorenzo, S. Conforti; Cornebise, P.; Doublet, Ph.; Dulucq, F.; Fleury, J.; Frisson, T.; van der Kolk, N.; Li, H.; Martin-Chassard, G.; Richard, F.; de la Taille, Ch.; Poeschl, R.; Raux, L.; Rouene, J.; Seguin-Moreau, N.] Univ Paris 11, CNRS IN2P3, Ctr Sci Orsay, Lab Accelerateur Lineaire, F-91898 Orsay, France.
[Anduze, M.; Balagura, V.; Boudry, V.; Brient, J-C.; Cornat, R.; Frotin, M.; Gastaldi, F.; Guliyev, E.; Haddad, Y.; Magniette, F.; Musat, G.; Ruan, M.; Tran, T. H.; Videau, H.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Bulanek, B.; Zacek, J.] Charles Univ Prague, Inst Particle & Nucl Phys, CZ-18000 Prague 8, Czech Republic.
[Cvach, J.; Gallus, P.; Havranek, M.; Janata, M.; Kvasnicka, J.; Lednicky, D.; Marcisovsky, M.; Polak, I.; Popule, J.; Tomasek, L.; Tomasek, M.; Ruzicka, P.; Sicho, P.; Smolik, J.; Vrba, V.; Zalesak, J.] Acad Sci Czech Republic, Inst Phys, CZ-18221 Prague 8, Czech Republic.
[Belhorma, B.; Ghazlane, H.] Ctr Natl Energie Sci & Tech Nucl, Rabat, Morocco.
[Kotera, K.; Takeshita, T.; Uozumi, S.] Shinshu Univ, Dept Phys, Matsumoto, Nagano 390861, Japan.
[Jeans, D.] Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan.
[Goetze, M.; Sauer, J.; Weber, S.; Zeitnitz, C.] Berg Univ Wuppertal, Fachbereich Phys 8, D-42097 Wuppertal, Germany.
[Smith, J.] Univ Texas Arlington, Arlington, TX USA.
[Yan, W.] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China.
[van der Kraaij, E.] Univ Bergen, N-5020 Bergen, Norway.
[Bartsch, V.; Salvatore, F.] Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England.
[Danilov, M.; Mizuk, R.] Moscow Inst Phys & Technol, Moscow, Russia.
[Li, H.] LPSC Grenoble, Grenoble, France.
RP Simon, F (reprint author), Max Planck Inst Phys & Astrophys, Fohringer Ring 6, D-80805 Munich, Germany.
EM fsimon@mpp.mpg.de
RI U-ID, Kyushu/C-5291-2016; Danilov, Mikhail/C-5380-2014; Mizuk,
Roman/B-3751-2014; Chadeeva, Marina/C-8789-2016; van der Kolk,
Naomi/M-9423-2016; Tomasek, Lukas/G-6370-2014; Kvasnicka,
Jiri/G-6425-2014; Soloviev, Yury/M-8788-2015; Kirikova,
Nataliia/N-1710-2015; Tikhomirov, Vladimir/M-6194-2015; Smirnov,
Petr/N-9652-2015; Cvach, Jaroslav/G-6269-2014; Smolik, Jan/H-1479-2014;
Marcisovsky, Michal/H-1533-2014; Zalesak, Jaroslav/G-5691-2014; Calvo
Alamillo, Enrique/L-1203-2014; Kozlov, Valentin/M-8000-2015
OI Danilov, Mikhail/0000-0001-9227-5164; Chadeeva,
Marina/0000-0003-1814-1218; van der Kolk, Naomi/0000-0002-8670-0408;
Thomson, Mark/0000-0002-2654-9005; Blazey, Gerald/0000-0002-7435-5758;
Bilki, Burak/0000-0001-9515-3306; Watson, Nigel/0000-0002-8142-4678;
Tomasek, Lukas/0000-0002-5224-1936; Soloviev, Yury/0000-0003-1136-2827;
Tikhomirov, Vladimir/0000-0002-9634-0581; Zalesak,
Jaroslav/0000-0002-4519-4705; Calvo Alamillo,
Enrique/0000-0002-1100-2963;
FU Bundesministerium fur Bildung und Forschung, Germany; DFG cluster of
excellence 'Origin and Structure of the Universe' of Germany;
Helmholtz-Nachwuchsgruppen [VH-NG-206]; BMBF [05HS6VH1]; Alexander von
Humboldt Foundation [RUS1066839]; Helmholtz Foundation, SC Rosatom
[HRJRG-002]; RFBR, SC Rosatom [HRJRG-002]; Russian Ministry of Education
and Science [8174, 8411, 13662012.2, P220]; MICINN, Spain; CPAN, Spain;
CRI(MST) of MOST/KOSEF in Korea; US Department of Energy; US National
Science Foundation; Ministry of Education, Youth and Sports of the Czech
Republic [AV0 Z3407391, AV0 Z10100502, LC527, LA09042]; Grant Agency of
the Czech Republic [202/05/0653]; National Sciences and Engineering
Research Council of Canada; Science and Technology Facilities Council,
U.K.
FX We gratefully acknowledge the DESY and CERN managements for their
support and hospitality, and their accelerator staff for the reliable
and efficient beam operation. We would like to thank the HEP group of
the University of Tsukuba for the loan of drift chambers for the DESY
test beam. The authors would like to thank the RIMST (Zelenograd) group
for their help and sensors manufacturing. This work was supported by the
Bundesministerium fur Bildung und Forschung, Germany; by the the DFG
cluster of excellence 'Origin and Structure of the Universe' of Germany;
by the Helmholtz-Nachwuchsgruppen grant VH-NG-206; by the BMBF, grant
no. 05HS6VH1; by the Alexander von Humboldt Foundation (Research Award
IV, RUS1066839 GSA); by joint Helmholtz Foundation and RFBR grant
HRJRG-002, SC Rosatom; by the Russian Ministry of Education and Science
via grants 8174, 8411, 1366.2012.2, P220; by MICINN and CPAN, Spain; by
CRI(MST) of MOST/KOSEF in Korea; by the US Department of Energy and the
US National Science Foundation; by the Ministry of Education, Youth and
Sports of the Czech Republic under the projects AV0 Z3407391, AV0
Z10100502, LC527 and LA09042 and by the Grant Agency of the Czech
Republic under the project 202/05/0653; by the National Sciences and
Engineering Research Council of Canada; and by the Science and
Technology Facilities Council, U.K..
NR 18
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U1 0
U2 15
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1748-0221
J9 J INSTRUM
JI J. Instrum.
PD SEP
PY 2013
VL 8
AR P09001
DI 10.1088/1748-0221/8/09/P09001
PG 26
WC Instruments & Instrumentation
SC Instruments & Instrumentation
GA 248FL
UT WOS:000326680200015
ER
PT J
AU Alvarez, V
Borges, FIG
Carcel, S
Castel, J
Cebrian, S
Cervera, A
Conde, CAN
Dafni, T
Dias, THVT
Diaz, J
Egorov, M
Esteve, R
Evtoukhovitch, P
Fernandes, LMP
Ferrario, P
Ferreira, AL
Freitas, EDC
Gehman, VM
Gil, A
Goldschmidt, A
Gomez, H
Gomez-Cadenas, JJ
Gonzalez-Diaz, D
Gutierrez, RM
Hauptman, J
Morata, JAH
Herrera, DC
Iguaz, FJ
Irastorza, IG
Jinete, MA
Labarga, L
Laing, A
Liubarsky, I
Lopes, JAM
Lorca, D
Losada, M
Luzon, G
Mari, A
Martin-Albo, J
Martinez, A
Martinez, G
Miller, T
Moiseenko, A
Monrabal, F
Monserrate, M
Monteiro, CMB
Mora, FJ
Moutinho, LM
Vidal, JM
da Luz, HN
Navarro, G
Nebot-Guinot, M
Nygren, D
Oliveira, CAB
Palma, R
Perez, J
Aparicio, JLP
Renner, J
Ripoll, L
Rodriguez, A
Rodriguez, J
Santos, FP
dos Santos, JMF
Segui, L
Serra, L
Shuman, D
Simon, A
Sofka, C
Sorel, M
Toledo, JF
Tomas, A
Torrent, J
Tsamalaidze, Z
Veloso, JFCA
Villar, JA
Webb, R
White, JT
Yahlali, N
AF Alvarez, V.
Borges, F. I. G.
Carcel, S.
Castel, J.
Cebrian, S.
Cervera, A.
Conde, C. A. N.
Dafni, T.
Dias, T. H. V. T.
Diaz, J.
Egorov, M.
Esteve, R.
Evtoukhovitch, P.
Fernandes, L. M. P.
Ferrario, P.
Ferreira, A. L.
Freitas, E. D. C.
Gehman, V. M.
Gil, A.
Goldschmidt, A.
Gomez, H.
Gomez-Cadenas, J. J.
Gonzalez-Diaz, D.
Gutierrez, R. M.
Hauptman, J.
Hernando Morata, J. A.
Herrera, D. C.
Iguaz, F. J.
Irastorza, I. G.
Jinete, M. A.
Labarga, L.
Laing, A.
Liubarsky, I.
Lopes, J. A. M.
Lorca, D.
Losada, M.
Luzon, G.
Mari, A.
Martin-Albo, J.
Martinez, A.
Martinez, G.
Miller, T.
Moiseenko, A.
Monrabal, F.
Monserrate, M.
Monteiro, C. M. B.
Mora, F. J.
Moutinho, L. M.
Munoz Vidal, J.
Natal da Luz, H.
Navarro, G.
Nebot-Guinot, M.
Nygren, D.
Oliveira, C. A. B.
Palma, R.
Perez, J.
Perez Aparicio, J. L.
Renner, J.
Ripoll, L.
Rodriguez, A.
Rodriguez, J.
Santos, F. P.
dos Santos, J. M. F.
Segui, L.
Serra, L.
Shuman, D.
Simon, A.
Sofka, C.
Sorel, M.
Toledo, J. F.
Tomas, A.
Torrent, J.
Tsamalaidze, Z.
Veloso, J. F. C. A.
Villar, J. A.
Webb, R.
White, J. T.
Yahlali, N.
CA NEXT Collaboration
TI Operation and first results of the NEXT-DEMO prototype using a silicon
photomultiplier tracking array
SO JOURNAL OF INSTRUMENTATION
LA English
DT Article
DE Pattern recognition, cluster finding, calibration and fitting methods;
Double-beta decay detectors; Particle tracking detectors (Gaseous
detectors); Time projection chambers
AB NEXT-DEMO is a high-pressure xenon gas TPC which acts as a technological test-bed and demonstrator for the NEXT-100 neutrinoless double beta decay experiment. In its current configuration the apparatus fully implements the NEXT-100 design concept. This is an asymmetric TPC, with an energy plane made of photomultipliers and a tracking plane made of silicon photomultipliers (SiPM) coated with TPB. The detector in this new configuration has been used to reconstruct the characteristic signature of electrons in dense gas, demonstrating the ability to identify the MIP and "blob" regions. Moreover, the SiPM tracking plane allows for the definition of a large fiducial region in which an excellent energy resolution of 1.82% FWHM at 511 keV has been measured (a value which extrapolates to 0.83% at the xenon Q(beta beta)).
C1 [Alvarez, V.; Carcel, S.; Cervera, A.; Diaz, J.; Ferrario, P.; Gil, A.; Gomez-Cadenas, J. J.; Laing, A.; Liubarsky, I.; Lorca, D.; Martin-Albo, J.; Martinez, A.; Monrabal, F.; Monserrate, M.; Munoz Vidal, J.; Nebot-Guinot, M.; Rodriguez, J.; Serra, L.; Simon, A.; Sorel, M.; Yahlali, N.] CSIC, Inst Fis Corpuscular IFIC, Valencia 46980, Spain.
[Alvarez, V.; Carcel, S.; Cervera, A.; Diaz, J.; Ferrario, P.; Gil, A.; Gomez-Cadenas, J. J.; Laing, A.; Liubarsky, I.; Lorca, D.; Martin-Albo, J.; Martinez, A.; Monrabal, F.; Monserrate, M.; Munoz Vidal, J.; Nebot-Guinot, M.; Rodriguez, J.; Serra, L.; Simon, A.; Sorel, M.; Yahlali, N.] Univ Valencia, Valencia 46980, Spain.
[Borges, F. I. G.; Conde, C. A. N.; Dias, T. H. V. T.; Fernandes, L. M. P.; Freitas, E. D. C.; Lopes, J. A. M.; Monteiro, C. M. B.; Natal da Luz, H.; Santos, F. P.; dos Santos, J. M. F.] Univ Coimbra, Dept Fis, P-3004516 Coimbra, Portugal.
[Castel, J.; Cebrian, S.; Dafni, T.; Gomez, H.; Gonzalez-Diaz, D.; Herrera, D. C.; Iguaz, F. J.; Irastorza, I. G.; Luzon, G.; Rodriguez, A.; Segui, L.; Tomas, A.; Villar, J. A.] Univ Zaragoza, Lab Fis Nucl & Astroparticulas, E-50009 Zaragoza, Spain.
[Egorov, M.; Gehman, V. M.; Goldschmidt, A.; Miller, T.; Nygren, D.; Oliveira, C. A. B.; Renner, J.; Shuman, D.; Toledo, J. F.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Esteve, R.; Mari, A.; Mora, F. J.] Univ Politecn Valencia, I3M, Valencia 46022, Spain.
[Evtoukhovitch, P.; Moiseenko, A.; Tsamalaidze, Z.] Joint Inst Nucl Res, Dubna 141980, Russia.
[Ferreira, A. L.; Moutinho, L. M.; Veloso, J. F. C. A.] Univ Aveiro, I3N, P-3810193 Aveiro, Portugal.
[Gutierrez, R. M.; Jinete, M. A.; Losada, M.; Navarro, G.] Univ Antonio Narino, Ctr Invest, Bogota, Colombia.
[Hauptman, J.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Hernando Morata, J. A.; Martinez, G.] Univ Santiago de Compostela, IGFAE, Santiago De Compostela 15782, Spain.
[Labarga, L.; Perez, J.] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain.
[Palma, R.; Perez Aparicio, J. L.] Univ Politecn Valencia, Dept Mecan Medios Continuos & Teor Estruct, E-46071 Valencia, Spain.
[Ripoll, L.; Torrent, J.] Univ Girona, Escola Politecn Super, Girona 17071, Spain.
[Sofka, C.; Webb, R.; White, J. T.] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA.
RP Laing, A (reprint author), CSIC, Inst Fis Corpuscular IFIC, Calle Catedratico Jose Beltran 2, Valencia 46980, Spain.
EM andrew.laing@ific.uv.es; francesc.monrabal@ific.uv.es
RI Hernando Morata, Jose Angel/L-7642-2014; Dafni, Theopisti /J-9646-2012;
Diaz, Jose/B-3454-2012; AMADE Research Group, AMADE/B-6537-2014;
Balanzat, Josep Costa/C-1017-2014; matias-lopes, jose/H-6074-2012;
Villar, Jose Angel/K-6630-2014; Gonzalez Diaz, Diego/K-7265-2014;
veloso, joao/J-4478-2013; Irastorza, Igor/B-2085-2012; Gomez Cadenas,
Juan Jose/L-2003-2014; Gil Ortiz, Alejandro/M-1671-2014; YAHLALI,
NADIA/L-1880-2014; Monrabal, Francesc/A-5880-2015; Ripoll,
Lluis/A-8413-2015; dos Santos, Joaquim/B-3058-2015; Perez-Aparicio,
Jose/H-7053-2015; Natal da Luz, Hugo/F-6460-2013; Fernandes,
Luis/E-2372-2011; Moutinho, Luis/J-6021-2013; Iguaz Gutierrez, Francisco
Jose/F-4117-2016;
OI Hernando Morata, Jose Angel/0000-0002-8683-5142; Dafni, Theopisti
/0000-0002-8921-910X; Diaz, Jose/0000-0002-7239-223X; AMADE Research
Group, AMADE/0000-0002-5778-3291; matias-lopes,
jose/0000-0002-6366-2963; Villar, Jose Angel/0000-0003-0228-7589;
Gonzalez Diaz, Diego/0000-0002-6809-5996; Irastorza,
Igor/0000-0003-1163-1687; Gomez Cadenas, Juan Jose/0000-0002-8224-7714;
Sorel, Michel/0000-0003-2141-9508; Toledo Alarcon, Jose
Francisco/0000-0002-9782-4510; Freitas, Elisabete/0000-0001-8235-3229;
Santos, Filomena/0000-0002-0214-4185; Martin-Albo,
Justo/0000-0002-7318-1469; Veloso, Joao/0000-0002-7107-7203; Luzon
Marco, Gloria/0000-0002-5352-1884; Munoz Vidal,
Javier/0000-0002-9649-2251; Borges Soares, Filipa/0000-0001-5790-173X;
Ferreira, Antonio /0000-0002-8696-3590; dos Santos, Joaquim Marques
Ferreira/0000-0002-8841-6523; Conde, Carlos/0000-0002-1387-2161;
Monteiro, Cristina Maria Bernardes/0000-0002-1912-2804; Palma,
Roberto/0000-0002-4047-381X; Gil Ortiz, Alejandro/0000-0002-0852-412X;
YAHLALI, NADIA/0000-0003-2184-0132; Monrabal,
Francesc/0000-0002-4047-5620; Ripoll, Lluis/0000-0001-8194-5396;
Perez-Aparicio, Jose/0000-0003-2884-6991; Natal da Luz,
Hugo/0000-0003-1177-870X; Fernandes, Luis/0000-0002-7061-8768; Moutinho,
Luis/0000-0001-9074-4449; Iguaz Gutierrez, Francisco
Jose/0000-0001-6327-9369; Dias, Teresa/0000-0001-5101-4902
FU Ministerio de Economia y Competitividad of Spain [2010 CSD2008-0037,
FPA2009-13697-C04-04, FIS2012-37947-C04]; Office of Science, Office of
Basic Energy Sciences, of the US Department of Energy
[DE-AC02-05CH11231]; Portuguese FCT; FEDER through the program COMPETE
[PTDC/FIS/103860/2008, PTDC/FIS/112272/2009]; US DOE NNSA Stewardship
Science Graduate Fellowship [DE-FC52-08NA28752]
FX This work was supported by the following agencies and institutions: the
Ministerio de Economia y Competitividad of Spain under grants
CONSOLIDER-Ingenio 2010 CSD2008-0037 (CUP), FPA2009-13697-C04-04 and
FIS2012-37947-C04; the Director, Office of Science, Office of Basic
Energy Sciences, of the US Department of Energy under contract no.
DE-AC02-05CH11231; and the Portuguese FCT and FEDER through the program
COMPETE, projects PTDC/FIS/103860/2008 and PTDC/FIS/112272/2009. J.
Renner (LBNL) acknowledges the support of a US DOE NNSA Stewardship
Science Graduate Fellowship under contract no. DE-FC52-08NA28752.
NR 14
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1748-0221
J9 J INSTRUM
JI J. Instrum.
PD SEP
PY 2013
VL 8
AR P09011
DI 10.1088/1748-0221/8/09/P09011
PG 20
WC Instruments & Instrumentation
SC Instruments & Instrumentation
GA 248FL
UT WOS:000326680200025
ER
PT J
AU Gehman, VM
AF Gehman, V. M.
TI WLS R&D for the detection of noble gas scintillation at LBL: seeing the
light from neutrinos, to dark matter, to double beta decay
SO JOURNAL OF INSTRUMENTATION
LA English
DT Article
DE Photon detectors for UV, visible and IR photons (gas); Double-beta decay
detectors; Neutrino detectors; Dark Matter detectors (WIMPs, axions,
etc.)
ID LIQUID-HELIUM; MICROBOONE; NEUTRONS
AB Radiation detectors with noble gasses as the active medium are becoming increasingly common in experimental programs searching for physics beyond the standard model. Nearly all of these experiments rely to some degree on collecting scintillation light from noble gasses. The VUV wavelengths associated with noble gas scintillation mean that most of these experiments use a fluorescent material to shift the direct scintillation light into the visible or near UV band. We present an overview of the R&D program at LBL related to noble gas detectors for neutrino physics, double beta decay, and dark matter. This program ranges from precise measurements of the fluorescence behavior of wavelength shifting films, to the prototyping of large are VUV sensitive light guides for multi-kiloton detectors.
C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA.
RP Gehman, VM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM vmgehman@lbl.gov
FU Office of Science, of the U.S. Department of Energy [DE-AC02-05CH11231]
FX This work was supported by the Director, Office of Science, of the U.S.
Department of Energy under Contract No. DE-AC02-05CH11231.
NR 27
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PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1748-0221
J9 J INSTRUM
JI J. Instrum.
PD SEP
PY 2013
VL 8
AR C09007
DI 10.1088/1748-0221/8/09/C09007
PG 8
WC Instruments & Instrumentation
SC Instruments & Instrumentation
GA 248FL
UT WOS:000326680200007
ER
PT J
AU Huang, HX
Ruan, XC
Ren, J
Fan, CJ
Chen, YN
Lv, YL
Wang, ZH
Zhou, ZY
Hou, L
Xin, B
Yu, CJ
Zhang, JW
Zhang, YH
Bai, JZ
Zhuang, HL
He, W
Liu, JL
Worcester, E
Themann, H
Ling, JJ
Cherwinka, J
Webber, DM
AF Huang, H. X.
Ruan, X. C.
Ren, J.
Fan, C. J.
Chen, Y. N.
Lv, Y. L.
Wang, Z. H.
Zhou, Z. Y.
Hou, L.
Xin, B.
Yu, C. J.
Zhang, J. W.
Zhang, Y. H.
Bai, J. Z.
Zhuang, H. L.
He, W.
Liu, J. L.
Worcester, E.
Themann, H.
Ling, J. J.
Cherwinka, J.
Webber, D. M.
TI Manual calibration system for Daya Bay Reactor Neutrino Experiment
SO JOURNAL OF INSTRUMENTATION
LA English
DT Article
DE Detector alignment and calibration methods (lasers, sources,
particle-beams); Large detector systems for particle and astroparticle
physics
ID LIQUID SCINTILLATOR
AB The Daya Bay Reactor Neutrino Experiment has measured the last unknown neutrino mixing angle, theta(13), to be non-zero at the 7.7 sigma level. This is the most precise measurement to theta(13) to date [1, 2]. To further enhance the understanding of the response of the antineutrino detectors (ADs), a detailed calibration of an AD with the Manual Calibration System (MCS) was undertaken during the summer 2012 shutdown. The MCS is capable of placing a radioactive source with a positional accuracy of 25 mm in R direction, 12 mm in Z axis and 0.5 degrees Phi in F direction. A detailed description of the MCS is presented followed by a summary of its performance in the AD calibration run.
C1 [Huang, H. X.; Ruan, X. C.; Ren, J.; Fan, C. J.; Chen, Y. N.; Lv, Y. L.; Wang, Z. H.; Zhou, Z. Y.; Hou, L.; Xin, B.] China Inst Atom Energy, Dept Phys, Beijing, Peoples R China.
[Yu, C. J.; Zhang, J. W.; Zhang, Y. H.; Bai, J. Z.; Zhuang, H. L.; He, W.] Inst High Energy Phys, Beijing 100039, Peoples R China.
[Liu, J. L.] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200030, Peoples R China.
[Worcester, E.; Themann, H.; Ling, J. J.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Cherwinka, J.; Webber, D. M.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
RP Huang, HX (reprint author), China Inst Atom Energy, Dept Phys, POB 275 46, Beijing, Peoples R China.
EM huanghx@ciae.ac.cn
RI Ling, Jiajie/I-9173-2014; Liu, Jianglai/P-2587-2015
OI Ling, Jiajie/0000-0003-2982-0670; Liu, Jianglai/0000-0002-4563-3157
FU National Natural Science Foundation [10890094]; Ministry of Science and
Technology of China [2013CB834306]
FX This work was supported by the National Natural Science Foundation under
the grant No. 10890094 and the Ministry of Science and Technology of
China under the grant No. 2013CB834306. The authors would like to thank
Ralph Brown from BNL, Xiao Tang, Yuanguang Xia, Xiaoyan Ma, Linshu Wang,
Jingyu Fu from IHEP, and many other technicians for their help during
the MCS design, test and installation.
NR 13
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1748-0221
J9 J INSTRUM
JI J. Instrum.
PD SEP
PY 2013
VL 8
AR P09013
DI 10.1088/1748-0221/8/09/P09013
PG 19
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SC Instruments & Instrumentation
GA 248FL
UT WOS:000326680200027
ER
PT J
AU Malace, SP
Sawatzky, BD
Gao, H
AF Malace, S. P.
Sawatzky, B. D.
Gao, H.
TI Studies of single-photoelectron response and of performance in magnetic
field of a H8500C-03 photomultiplier tube
SO JOURNAL OF INSTRUMENTATION
LA English
DT Article
DE Cherenkov detectors; Photon detectors for UV, visible and IR photons
(vacuum) (photomultipliers, HPDs, others); Spectrometers; Cherenkov and
transition radiation
AB We studied the single-photoelectron detection capabilities of a multianode photomultiplier tube H8500C-03 and its performance in high magnetic field. Our results show that the device can readily resolve signals at the single photoelectron level making it suitable for photon detection in both threshold and ring imaging Cherenkov detectors. We also found that a large longitudinal magnetic field, up to 300 Gauss, induces a change in the relative output of at most 55% for an edge pixel, and of at most 15% for a central pixel. The H8500C-03 signal loss in transverse magnetic fields it is significantly more pronounced than for the longitudinal case. Our studies of single photoelectron reduction in magnetic fields point to the field induced misfocusing of the photoelectron extracted from the photocathode as primary cause of signal loss. With appropriate shielding this PMT could function in high magnetic field environments.
C1 [Malace, S. P.; Gao, H.] Duke Univ, Durham, NC 27708 USA.
[Malace, S. P.; Sawatzky, B. D.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
RP Malace, SP (reprint author), Duke Univ, Durham, NC 27708 USA.
EM simona@jlab.org
FU DOE [DE-AC05-06OR23177]; U.S. Department of Energy [DE-FG02-03ER41231];
U.S. Department of Energy
FX The collaboration wishes to acknowledge the Detector Group at Jefferson
Lab: Drew Weisenberger, Jack Mckisson, and Carl Zorn for their help with
the PMT readout. We would also like to thank the Hamamatsu
representative Ardavan Ghassemi for useful discussions. This work was
supported by the U.S. Department of Energy. Jefferson Science Associates
operates the Thomas Jefferson National Accelerator Facility under DOE
contract No. DE-AC05-06OR23177. This work was also supported by the U.S.
Department of Energy under Contract No. DE-FG02-03ER41231.
NR 2
TC 2
Z9 2
U1 2
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1748-0221
J9 J INSTRUM
JI J. Instrum.
PD SEP
PY 2013
VL 8
AR P09004
DI 10.1088/1748-0221/8/09/P09004
PG 39
WC Instruments & Instrumentation
SC Instruments & Instrumentation
GA 248FL
UT WOS:000326680200018
ER
PT J
AU Pahlka, RB
AF Pahlka, R. B.
TI Status of the solid xenon project at Fermilab
SO JOURNAL OF INSTRUMENTATION
LA English
DT Article
DE Scintillators, scintillation and light emission processes (solid, gas
and liquid scintillators); Cryogenic detectors; Calorimeter methods;
Liquid detectors
AB The solid (crystalline) phase of xenon possesses many of the same advantages of liquid xenon as a particle detector material including good transparency and ionization drift, self-shielding, low intrinsic background, and high scintillation light yield. Many of the properties of solid xenon have been measured previously employing small volumes and thin films. However, few systematic studies have been successfully produced using large volumes of solid xenon. Two major R&D issues must be addressed to make a solid xenon particle detector; the demonstration of the scalability of solid xenon and the capability to readout solid xenon signals. Both issues are being addressed with a dedicated cryogenic system at Fermilab. The first phase of this project entailed growing approximately a kilogram of transparent solid phase xenon and was successfully completed in 2010 at Fermilab. The second phase of this project is underway where the signals from scintillation light and electron drift in solid xenon will be measured. These measurements are expected to be completed this year. In this talk, we will discuss the recent progress of solid xenon detector R&D performed at Fermilab.
C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Pahlka, RB (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
EM pahlka@fnal.gov
FU U.S. Department of Energy
FX This work was supported by the U.S. Department of Energy. We are
grateful to the Fermilab technical staff for providing assistance with
system construction and cryogenics.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1748-0221
J9 J INSTRUM
JI J. Instrum.
PD SEP
PY 2013
VL 8
AR C09013
DI 10.1088/1748-0221/8/09/C09013
PG 6
WC Instruments & Instrumentation
SC Instruments & Instrumentation
GA 248FL
UT WOS:000326680200013
ER
PT J
AU Rielage, K
AF Rielage, K.
CA CAPTAIN Collaboration
TI Photon detection in the Cryogenic Apparatus for Precision Tests of Argon
Interactions with Neutrinos (CAPTAIN)
SO JOURNAL OF INSTRUMENTATION
LA English
DT Article
DE Neutrino detectors; Particle tracking detectors; Large detector systems
for particle; astroparticle physics; Time projection chambers
AB The Cryogenic Apparatus for Precision Tests of Argon Interactions with Neutrinos (CAPTAIN) is being built at Los Alamos National Laboratory. A hexagonal time projection chamber (TPC) with a 1 m drift length will be constructed inside a cryostat containing 7,700L of liquid argon. CAPTAIN will be used to test interactions using beams of neutrons and neutrinos. It will serve as a test bed for various options for the Long Baseline Neutrino Experiment (LBNE) including in the photon detection system. The current photon detection system will be described and future options discussed. The system is composed of sixteen R8520-500 Hamamatsu photomultiplier tubes with a wavelength shifting coating on acrylic in front of the PMT. Various wavelength shifting coatings can be examined with the current default of tetraphenyl butadiene.
C1 [Rielage, K.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Rielage, K (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM rielagek@lanl.gov
OI Rielage, Keith/0000-0002-7392-7152
FU Los Alamos National Laboratory's Laboratory Directed Research and
Development program; Department of Energy's Office of Science High
Energy Physics program
FX This work is supported by the Los Alamos National Laboratory's
Laboratory Directed Research and Development program and the Department
of Energy's Office of Science High Energy Physics program.
NR 4
TC 1
Z9 1
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1748-0221
J9 J INSTRUM
JI J. Instrum.
PD SEP
PY 2013
VL 8
AR C09002
DI 10.1088/1748-0221/8/09/C09002
PG 5
WC Instruments & Instrumentation
SC Instruments & Instrumentation
GA 248FL
UT WOS:000326680200002
ER
PT J
AU Liao, HC
Ho, CC
Chang, CY
Jao, MH
Darling, SB
Su, WF
AF Liao, Hsueh-Chung
Ho, Chun-Chih
Chang, Chun-Yu
Jao, Meng-Huan
Darling, Seth B.
Su, Wei-Fang
TI Additives for morphology control in high-efficiency organic solar cells
SO MATERIALS TODAY
LA English
DT Review
ID OPEN-CIRCUIT VOLTAGE; POWER CONVERSION EFFICIENCY; CONJUGATED
SIDE-CHAIN; LOW-BANDGAP POLYMER; PROCESSING ADDITIVES; SOLVENT
ADDITIVES; PHASE-SEPARATION; INTERPENETRATING NETWORK; PHOTOVOLTAIC
POLYMERS; EXCITON DISSOCIATION
AB Bulk heterojunction (BHJ) photovoltaics represent one of the most promising technologies in low-cost, high-throughput, environmentally friendly energy conversion. Morphological control is one pillar of the recent remarkable progress in power conversion efficiency. This review focuses on morphological control by processing with solvent additives, which has been extensively adopted and exhibits promising compatibility with large-scale processing. Recent investigations including material selection, morphological variations at various length scales, and interpretations of the interaction among additives and BHJ materials will be discussed. Insights into the role of solvent additives represent an important resource for further improvement in materials and processing designs.
C1 [Liao, Hsueh-Chung; Ho, Chun-Chih; Chang, Chun-Yu; Jao, Meng-Huan; Su, Wei-Fang] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 10617, Taiwan.
[Darling, Seth B.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Darling, Seth B.] Univ Chicago, Inst Mol Engn, Chicago, IL 60637 USA.
RP Darling, SB (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM darling@anl.gov; suwf@ntu.edu.tw
RI Su, Wei-Fang/C-2646-2009
FU National Science of Council of Taiwan [101-3113-E-002-010]; U.S.
Department of Energy, Office of Science, Office of Basic Energy Sciences
User Facility [DE-AC02-06CH11357]
FX Financial support obtained from the National Science of Council of
Taiwan (101-3113-E-002-010) is highly appreciated. This work was
performed, in part, at the Center for Nanoscale Materials, a U.S.
Department of Energy, Office of Science, Office of Basic Energy Sciences
User Facility under Contract no. DE-AC02-06CH11357.
NR 103
TC 173
Z9 173
U1 18
U2 160
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1369-7021
EI 1873-4103
J9 MATER TODAY
JI Mater. Today
PD SEP
PY 2013
VL 16
IS 9
BP 326
EP 336
DI 10.1016/j.mattod.2013.08.013
PG 11
WC Materials Science, Multidisciplinary
SC Materials Science
GA 252KB
UT WOS:000327002500017
ER
PT J
AU Guarnieri, MT
AF Guarnieri, Michael T.
TI Comparative proteomics lends insight into genotype-specific
pathogenicity
SO PROTEOMICS
LA English
DT Editorial Material
DE Algae; Comparative proteomics; Pathogenesis; Plant proteomics
ID PROTOTHECA-ZOPFII; OSTREOCOCCUS-TAURI; STARVATION; VIRULENCE; MASTITIS;
PLANTS; ALGAE; LONG
AB Comparative proteomic analyses have emerged as a powerful tool for the identification of unique biomarkers and mechanisms of pathogenesis. In this issue of Proteomics, Murugaiyan et al. utilize difference gel electrophoresis (DIGE) to examine differential protein expression between nonpathogenic and pathogenic genotypes of Prototheca zopfii, a causative agent in bovine enteritis and mastitis. Their findings provide insights into molecular mechanisms of infection and evolutionary adaptation of pathogenic genotypes, demonstrating the power of comparative proteomic analyses.
C1 Natl Bioenergy Ctr, Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Guarnieri, MT (reprint author), Natl Bioenergy Ctr, Natl Renewable Energy Lab, 15013 Denver West Pkwy,MS 3323, Golden, CO 80401 USA.
EM Michael.Guarnieri@nrel.gov
NR 28
TC 1
Z9 1
U1 0
U2 9
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1615-9853
EI 1615-9861
J9 PROTEOMICS
JI Proteomics
PD SEP
PY 2013
VL 13
IS 17
BP 2544
EP 2545
DI 10.1002/pmic.201300322
PG 2
WC Biochemical Research Methods; Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 252MK
UT WOS:000327009000004
PM 23925996
ER
PT J
AU Iacovides, DC
Johnson, AB
Wang, N
Boddapati, S
Korkola, J
Gray, JW
AF Iacovides, D. C.
Johnson, A. B.
Wang, N.
Boddapati, S.
Korkola, J.
Gray, J. W.
TI Identification and quantification of AKT isoforms and phosphoforms in
breast cancer using a novel, ultrasensitive nanofluidic immunoassay
SO EUROPEAN JOURNAL OF CANCER
LA English
DT Meeting Abstract
CT European Cancer Congress 2013 - 17th ECCO / 38th ESMO / 32nd ESTRO
CY SEP 27-OCT 01, 2013
CL Amsterdam, NETHERLANDS
SP European Conf Clin Oncol, European Soc Therapeut Radiol & Oncol, European Soc Med Oncol, European Soc Surg Oncol, European Assoc Canc Res, European Oncol Nursing Soc, European Soc Paediat Oncol
C1 [Iacovides, D. C.; Johnson, A. B.] Lawrence Berkeley Natl Lab, San Francisco, CA USA.
[Wang, N.; Boddapati, S.; Korkola, J.; Gray, J. W.] Oregon Hlth & Sci Univ, Dept Biomed Engn, Portland, OR 97201 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0959-8049
EI 1879-0852
J9 EUR J CANCER
JI Eur. J. Cancer
PD SEP
PY 2013
VL 49
SU 2
MA 645
BP S138
EP S138
PG 1
WC Oncology
SC Oncology
GA 250HY
UT WOS:000326843600488
ER
PT J
AU Zhang, R
Zhang, JX
Zhang, YC
Sun, JY
Yan, GH
AF Zhang, Rui
Zhang, Jinxue
Zhang, Yanchao
Sun, Jinyuan
Yan, Guanhua
TI Privacy-Preserving Profile Matching for Proximity-Based Mobile Social
Networking
SO IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
LA English
DT Article
DE Proximity-based mobile social networking; profile matching; privacy
AB Proximity-based mobile social networking (PMSN) refers to the social interaction among physically proximate mobile users. The first step toward effective PMSN is for mobile users to choose whom to interact with. Profile matching refers to two users comparing their personal profiles and is promising for user selection in PMSN. It, however, conflicts with users' growing privacy concerns about disclosing their personal profiles to complete strangers. This paper tackles this open challenge by designing novel fine-grained private matching protocols. Our protocols enable two users to perform profile matching without disclosing any information about their profiles beyond the comparison result. In contrast to existing coarse-grained private matching schemes for PMSN, our protocols allow finer differentiation between PMSN users and can support a wide range of matching metrics at different privacy levels. The performance of our protocols is thoroughly analyzed and evaluated via real smartphone experiments.
C1 [Zhang, Rui] Univ Hawaii, Dept Elect Engn, Honolulu, HI 96822 USA.
[Zhang, Jinxue; Zhang, Yanchao] Arizona State Univ, Sch Elect Comp & Energy Engn, Tempe, AZ 85287 USA.
[Sun, Jinyuan] Univ Tennessee, Dept Elect Engn & Comp Sci, Knoxville, TN 37996 USA.
[Yan, Guanhua] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Zhang, R (reprint author), Univ Hawaii, Dept Elect Engn, Honolulu, HI 96822 USA.
EM ruizhang@asu.edu; jxzhang@asu.edu; yczhang@asu.edu; jysun@eecs.utk.edu;
ghyan@lanl.gov
FU US National Science Foundation [CNS-1117462, CNS-0844972]
FX This work was supported in part by the US National Science Foundation
under grants CNS-1117462 and CNS-0844972 (CAREER). The preliminary
version of this paper appeared in IEEE INFOCOM' 12 [1].
NR 32
TC 20
Z9 24
U1 2
U2 16
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0733-8716
EI 1558-0008
J9 IEEE J SEL AREA COMM
JI IEEE J. Sel. Areas Commun.
PD SEP
PY 2013
VL 31
IS 9
SU S
BP 656
EP 668
DI 10.1109/JSAC.2013.SUP.0513057
PN 1
PG 13
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 242SR
UT WOS:000326262800058
ER
PT J
AU Burlaka, L
Kutsenko, L
Talianker, M
Fuks, D
Kiv, A
Brown, I
AF Burlaka, Lubov
Kutsenko, Larisa
Talianker, Michael
Fuks, David
Kiv, Arik
Brown, Ian
TI Observation of epsilon '-Ag-17 Mg-54 phase induced by plasma immersion
ion implantation
SO RADIATION EFFECTS AND DEFECTS IN SOLIDS
LA English
DT Article
DE ion implantation; transmission electron microscopy; DFT theory
ID AG
AB This paper provides a confirmation of the effectiveness of the recently suggested ab initio approach to the theoretical prediction of phase transformations which may be induced in metallic alloys by metal plasma immersion and ion implantation processing. The approach is based on an assumption that at certain concentrations of the implanted species, the relaxation of the exited electronic state of the implanted structure should be accompanied by the rearrangement of atoms leading to the formation of a new phase. Recently, on the basis of density functional theory calculations of the energetic characteristics of the electronic subsystems of the implanted Mg-Ag system, it was predicted that concentrations of the implanted Ag ions within the range from approximate to 18 to 23 at% Ag, favor transition to the phase epsilon-Ag17Mg54. Our transmission electron microscopy observations and electron diffraction analysis of the Mg-based alloy subjected to the implantation of Ag ions at dose of approximate to 5x10(15)ion/cm(2) confirmed that the formation of the epsilon-Ag17Mg54 phase indeed takes place.
C1 [Burlaka, Lubov; Kutsenko, Larisa; Talianker, Michael; Fuks, David; Kiv, Arik] Ben Gurion Univ Negev, Dept Mat Engn, IL-84105 Beer Sheva, Israel.
[Brown, Ian] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Kiv, A (reprint author), Ben Gurion Univ Negev, Dept Mat Engn, POB 653, IL-84105 Beer Sheva, Israel.
EM kiv@bgu.ac.il
NR 11
TC 0
Z9 0
U1 1
U2 5
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1042-0150
EI 1029-4953
J9 RADIAT EFF DEFECT S
JI Radiat. Eff. Defects Solids
PD SEP 1
PY 2013
VL 168
IS 9
BP 631
EP 635
DI 10.1080/10420150.2013.781176
PG 5
WC Nuclear Science & Technology; Physics, Fluids & Plasmas; Physics,
Condensed Matter
SC Nuclear Science & Technology; Physics
GA 233XI
UT WOS:000325602400001
ER
PT J
AU Correa, MA
Escobar, VM
Trigueiro-Neto, O
Bohn, F
Sossmeier, KD
Bezerra, CG
Chesman, C
Pearson, J
Hoffmann, A
AF Correa, Marcio Assolin
Escobar, Vivian Montardo
Trigueiro-Neto, Osvaldo
Bohn, Felipe
Sossmeier, Kelly Daiane
Bezerra, Claudionor Gomes
Chesman, Carlos
Pearson, John
Hoffmann, Axel
TI Magnetization Dynamics Through Magnetoimpedance Effect in Isotropic
Co2FeAl/Au/Co2FeAl Full-Heusler Alloy Trilayer Films
SO APPLIED PHYSICS EXPRESS
LA English
DT Article
ID FERROMAGNETIC-RESONANCE; GIANT MAGNETOIMPEDANCE
AB We investigate the magnetization dynamics in low damping parameter alpha systems by measuring the magnetoimpedance effect over a wide range of frequencies, from 0.1 to 3.0 GHz, in Co2FeAl/Au/Co2FeAl full-Heusler alloy trilayer films grown by magnetron sputtering on glass and MgO substrates. We show that the film produced on the glass substrate presents high magnetoimpedance performance, while that grown on the MgO substrate has low magnetoimpedance performance. Since both films are polycrystalline and have isotropic in-plane magnetic properties, we interpret the magnetoimpedance results in terms of the low damping parameter alpha and strain effects in the films. Thus, we verified that our films present good magnetoimpedance performance and showed that high performance can be achieved even in films with isotropic in-plane magnetic properties, since they present low damping parameter alpha. (c) 2013 The Japan Society of Applied Physics
C1 [Correa, Marcio Assolin; Escobar, Vivian Montardo; Trigueiro-Neto, Osvaldo; Bohn, Felipe; Bezerra, Claudionor Gomes; Chesman, Carlos] Univ Fed Rio Grande do Norte, Dept Fis, BR-59078900 Natal, RN, Brazil.
[Bohn, Felipe] Univ Fed Rio Grande do Norte, Escola Ciencias & Tecnol, BR-59078900 Natal, RN, Brazil.
[Sossmeier, Kelly Daiane] Univ Fed Integracao Latinoamer, Inst Latinoamer Ciencias Vida & Nat, BR-85867970 Foz Do Iguacu, PR, Brazil.
[Bezerra, Claudionor Gomes] Trinity Coll Dublin, Sch Phys, Dublin 2, Ireland.
[Chesman, Carlos; Pearson, John; Hoffmann, Axel] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Correa, MA (reprint author), Univ Fed Rio Grande do Norte, Dept Fis, BR-59078900 Natal, RN, Brazil.
RI Bohn, Felipe/F-9233-2011; Correa, Marcio/E-1510-2013; Bezerra,
Claudionor/O-2696-2014; Hoffmann, Axel/A-8152-2009
OI Correa, Marcio/0000-0002-8904-4151; Bezerra,
Claudionor/0000-0001-9660-2142; Hoffmann, Axel/0000-0002-1808-2767
FU CNPq [310761/2011-5, 555620/2010-7]; CAPES [10144-12-9]; FAPERN
[013/2009, 064/2011, Pronem 03/2012]; INCT of Space Studies; U.S.
Department of Energy, Office of Science, Basic Energy Science
[DE-AC02-06CH11357]
FX MAC and FB would like to thank Antonio Azevedo, Sergio Machado Rezende,
and Obed Alves for fruitful discussions and experimental contributions.
The research is partially supported by the Brazilian agencies CNPq
(Grant Nos. 310761/2011-5 and 555620/2010-7), CAPES (Grant No.
10144-12-9), FAPERN (Grant PPP Nos. 013/2009, 064/2011, and Pronem
03/2012), and INCT of Space Studies. Our work at Argonne National
Laboratory was supported by the U.S. Department of Energy, Office of
Science, Basic Energy Science under Contract No. DE-AC02-06CH11357.
NR 24
TC 3
Z9 3
U1 0
U2 31
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1882-0778
EI 1882-0786
J9 APPL PHYS EXPRESS
JI Appl. Phys. Express
PD SEP
PY 2013
VL 6
IS 9
AR 093001
DI 10.7567/APEX.6.093001
PG 4
WC Physics, Applied
SC Physics
GA 219GK
UT WOS:000324494100023
ER
PT J
AU Feng, Q
Blythe, HJ
Fox, AM
Qin, XF
Xu, XH
Heald, SM
Gehring, GA
AF Feng, Qi
Blythe, Harry J.
Fox, A. Mark
Qin, Xiu-Fang
Xu, Xiao-Hong
Heald, Steve M.
Gehring, Gillian A.
TI Grain boundary ferromagnetism in vanadium-doped In2O3 thin films
SO EPL
LA English
DT Article
ID TEMPERATURE FERROMAGNETISM; MAGNETIC OXIDES; SPINTRONICS
AB Room temperature ferromagnetism was observed in In2O3 thin films doped with 5 at.% V, prepared by pulsed-laser deposition at substrate temperatures ranging from 300 to 600 degrees C. X-ray absorption fine-structure measurement indicated that V was substitutionally dissolved in the In2O3 host lattice, thus excluding the existence of secondary phases of V compounds. Magnetic measurements based on SQUID magnetometry and magnetic circular dichroism confirm that the magnetism is at grain boundaries and also in the grains. The overall magnetization originates from the competing effects between grains and grain boundaries. Copyright (C) EPLA, 2013
C1 [Feng, Qi; Blythe, Harry J.; Fox, A. Mark; Gehring, Gillian A.] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England.
[Qin, Xiu-Fang; Xu, Xiao-Hong] Shanxi Normal Univ, Sch Chem & Mat Sci, Linfen 041004, Peoples R China.
[Heald, Steve M.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Feng, Q (reprint author), Chinese Acad Sci, Inst Semicond, SKLSM, POB 912, Beijing 100083, Peoples R China.
EM fengqi1985@gmail.com; g.gehring@sheffield.ac.uk
RI Fox, Mark/F-1096-2010
OI Fox, Mark/0000-0002-9025-2441
FU U.S. DOE under [DE-AC02-06CH11357]; NSFC [51025101]
FX Use of the Advanced Photon Source, an Office of Science User Facility
operated for the U.S. Department of Energy (DOE) Office of Science by
Argonne National Laboratory, was also supported by the U.S. DOE under
Contract No. DE-AC02-06CH11357. The work is also financially supported
by NSFC (51025101).
NR 35
TC 0
Z9 0
U1 2
U2 14
PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
EI 1286-4854
J9 EPL-EUROPHYS LETT
JI EPL
PD SEP
PY 2013
VL 103
IS 6
AR 67007
DI 10.1209/0295-5075/103/67007
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 242XV
UT WOS:000326280200027
ER
PT J
AU Tai, YY
Zhu, JX
Graf, MJ
Ting, CS
AF Tai, Yuan-Yen
Zhu, Jian-Xin
Graf, Matthias J.
Ting, C. S.
TI Calculated phase diagram of doped BaFe2As2 superconductor in a
C-4-symmetry breaking model
SO EPL
LA English
DT Article
ID SYMMETRY; KFE2AS2; WAVE
AB We develop a minimal multiorbital tight-binding model with realistic hopping parameters. The model breaks the symmetry of the tetragonal point group by lowering it from C4 to D2d, which accurately describes the Fermi surface evolution of the electron-doped BaFe2-xCoxAs2 and hole-doped Ba1-yKyFe2As2 compounds. An investigation of the phase diagram with a mean-field t-U-V Bogoliubov-de Gennes Hamiltonian results in agreement with the experimentally observed electron-and hole-doped phase diagram with only one set of t, U and V parameters. Additionally, the self-consistently calculated superconducting order parameter exhibits s(+/-)-wave pairing symmetry with a small d-wave pairing admixture in the entire doping range, which is the subtle result of the weakly broken symmetry and competing interactions in the multiorbital mean-field Hamiltonian. Copyright (C) EPLA, 2013
C1 [Tai, Yuan-Yen; Ting, C. S.] Univ Houston, Dept Phys, Houston, TX 77004 USA.
[Zhu, Jian-Xin; Graf, Matthias J.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Zhu, Jian-Xin] Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA.
RP Tai, YY (reprint author), Univ Houston, Dept Phys, Houston, TX 77004 USA.
FU Robert A. Welch Foundation [E-1146]; U.S. DOE [DE-AC52-06NA25396];
Center for Integrated Nanotechnologies, a U. S. DOE Office of Basic
Energy Sciences user facility
FX We thank A. V. BALATSKY, T. DAS, and W. LI for many helpful discussions.
This work was supported in part by the Robert A. Welch Foundation under
Grant No. E-1146 (Y-YT and CST) and through the UC Laboratory Fees
Research program at LANL under the U.S. DOE Contract No.
DE-AC52-06NA25396 (Y-YT, J-XZ and MJG). This work was in part supported
by the Center for Integrated Nanotechnologies, a U. S. DOE Office of
Basic Energy Sciences user facility. Y-YT thanks LANL for its
hospitality during his visit.
NR 42
TC 10
Z9 10
U1 0
U2 8
PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
EI 1286-4854
J9 EPL-EUROPHYS LETT
JI EPL
PD SEP
PY 2013
VL 103
IS 6
AR 67001
DI 10.1209/0295-5075/103/67001
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 242XV
UT WOS:000326280200021
ER
PT J
AU West, N
Kirby, E
Bierman, P
Slingerland, R
Ma, L
Rood, D
Brantley, S
AF West, Nicole
Kirby, Eric
Bierman, Paul
Slingerland, Rudy
Ma, Lin
Rood, Dylan
Brantley, Susan
TI Regolith production and transport at the Susquehanna Shale Hills
Critical Zone Observatory, Part 2: Insights from meteoric Be-10
SO JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
LA English
DT Review
DE meteoric 10Be; critical zone; regolith flux
ID CHEMICAL-WEATHERING RATES; EASTERN-UNITED-STATES; SEDIMENT TRANSPORT;
COSMOGENIC NUCLIDES; SOIL PRODUCTION; LANDSCAPE EVOLUTION; PHYSICAL
EROSION; SERIES ISOTOPES; RIVER; TOPOGRAPHY
AB Regolith-mantled hillslopes are ubiquitous features of most temperate landscapes, and their morphology reflects the climatically, biologically, and tectonically mediated interplay between regolith production and downslope transport. Despite intensive research, few studies have quantified both of these mass fluxes in the same field site. Here we present an analysis of 87 meteoric Be-10 measurements from regolith and bedrock within the Susquehanna Shale Hills Critical Zone Observatory (SSHO), in central Pennsylvania. Meteoric Be-10 concentrations in bulk regolith samples (n=73) decrease with regolith depth. Comparison of hillslope meteoric Be-10 inventories with analyses of rock chip samples (n=14) from a 24m bedrock core confirms that >80% of the total inventory is retained in the regolith. The systematic downslope increase of meteoric Be-10 inventories observed at SSHO is consistent with Be-10 accumulation in slowly creeping regolith (similar to 0.2cmyr(-1)). Regolith flux inferred from meteoric Be-10 varies linearly with topographic gradient (determined from high-resolution light detection and ranging-based topography) along the upper portions of hillslopes at SSHO. However, regolith flux appears to depend on the product of gradient and regolith depth where regolith is thick, near the base of hillslopes. Meteoric Be-10 inventories at the north and south ridgetops indicate minimum regolith residence times of 10.53.7 and 9.12.9 ky, respectively, similar to residence times inferred from U-series isotopes in Ma et al. (2013). The combination of our results with U-series-derived regolith production rates implies that regolith production and erosion rates are similar to within a factor of two on SSHO hillcrests.
C1 [West, Nicole; Kirby, Eric; Slingerland, Rudy; Brantley, Susan] Penn State Univ, Earth & Environm Syst Inst, University Pk, PA 16802 USA.
[West, Nicole; Kirby, Eric; Slingerland, Rudy; Brantley, Susan] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA.
[Bierman, Paul] Univ Vermont, Dept Geol, Burlington, VT USA.
[Ma, Lin] Univ Texas El Paso, Dept Geol Sci, El Paso, TX 79968 USA.
[Rood, Dylan] Lawrence Livermore Natl Lab, Earth Res Inst, Livermore, CA USA.
RP West, N (reprint author), Penn State Univ, Earth & Environm Syst Inst, 542 Deike Bldg, University Pk, PA 16802 USA.
EM nxw157@psu.edu
FU National Science Foundation [EAR 07-25019]; U.S. Department of Energy by
Lawrence Livermore National Laboratory [DE-AC52-07NA27344]; NASA Earth
and Space Science Fellowship Program
FX We would like to thank the anonymous Associate Editor and reviewers,
whose suggestions led to improvements in this manuscript. We thank L.
Jin and members of the Brantley group for the help in sample collecting
and data interpretation. Members of the Cosmogenic Isotope Laboratory at
University of Vermont, particularly Luke Reusser, Charles Trodick, and
Lee Corbett, provided valuable assistance with meteoric 10Be
extractions. N.W. also thanks Jeremy Wimpey for participation in sample
collection and sample location surveys. Financial support for this work
was provided by the National Science Foundation, grant EAR 07-25019 for
the Susquehanna/Shale Hills Critical Zone Observatory to C. Duffy. AMS
work was performed under the auspices of the U.S. Department of Energy
by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344. NW also acknowledges support from the NASA Earth and
Space Science Fellowship Program.
NR 106
TC 29
Z9 29
U1 5
U2 40
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9003
EI 2169-9011
J9 J GEOPHYS RES-EARTH
JI J. Geophys. Res.-Earth Surf.
PD SEP
PY 2013
VL 118
IS 3
BP 1877
EP 1896
DI 10.1002/jgrf.20121
PG 20
WC Geosciences, Multidisciplinary
SC Geology
GA 238VC
UT WOS:000325978500048
ER
PT J
AU Anjos, DM
McDonough, JK
Perre, E
Brown, GM
Overbury, SH
Gogotsi, Y
Presser, V
AF Anjos, Daniela M.
McDonough, John K.
Perre, Emilie
Brown, Gilbert M.
Overbury, Steven H.
Gogotsi, Yury
Presser, Volker
TI Pseudocapacitance and performance stability of quinone-coated carbon
onions
SO NANO ENERGY
LA English
DT Article
DE Carbon onions; Electrochemical energy storage; Pseudocapacitor;
Quinones; Capacitance
ID ELECTROCHEMICAL ENERGY-STORAGE; DOUBLE-LAYER CAPACITORS; SUPERCAPACITOR
ELECTRODES; AQUEOUS ELECTROCHEMISTRY; DETONATION NANODIAMOND;
NEUTRON-SCATTERING; RAMAN-SPECTROSCOPY; MESOPOROUS CARBON; DIAMOND;
SURFACE
AB Onion-like carbon, also known as carbon onions, is a highly conductive material enabling supercapacitor electrodes with a very high power density. However, the moderate specific capacitance (circa 30 F/g) is insufficient for many energy storage applications. In our study, we show how decoration of carbon onions with quinones provides a facile method to increase the energy density up to one order of magnitude, namely, from 0.5 Wh/kg to 4.5 Wh/kg, while retaining a high power density and long lifetime. We present data for carbon onions modified with three different kinds of quinones: 1,4-naphthoquinone, 9,10-phenanthrenequinone, and 4,5-pyrenedione. Quinone-decorated carbon onion electrodes are investigated considering the actual quinone loading and the resulting electrochemical performance is probed in 1 M H2SO4 as the electrolyte using cyclic voltammetry and galvanostatic charge/discharge. The maximum capacitance, 264 F/g, is found for carbon onions modified with 4,5-pyrenedione, which also shows the smallest fade in specific capacitance, namely 3%, over 10,000 charge and discharge cycles at a high current density of 1.3 A/g. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Anjos, Daniela M.; Brown, Gilbert M.; Overbury, Steven H.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[McDonough, John K.; Gogotsi, Yury] Drexel Univ, AJ Drexel Nanotechnol Inst, Philadelphia, PA 19104 USA.
[McDonough, John K.; Gogotsi, Yury] Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA.
[Perre, Emilie; Presser, Volker] INM Leibniz Inst New Mat, Energy Mat Grp, D-66123 Saarbrucken, Germany.
[Perre, Emilie; Presser, Volker] Univ Saarland, D-66123 Saarbrucken, Germany.
RP Presser, V (reprint author), INM Leibniz Inst New Mat, Energy Mat Grp, D-66123 Saarbrucken, Germany.
EM overburysh@ornl.gov; gogotsi@drexel.edu; volker.presser@inm-gmbh.de
RI Presser, Volker/F-1975-2010; Gogotsi, Yury/B-2167-2008; Overbury,
Steven/C-5108-2016
OI Presser, Volker/0000-0003-2181-0590; Gogotsi, Yury/0000-0001-9423-4032;
Overbury, Steven/0000-0002-5137-3961
FU Fluid Interface Reactions, Structures and Transport (FIRST) Center;
Energy Frontier Research Center; U.S. Department of Energy, Office of
Science, Office of Basic Energy; German Federal Ministry for Research
and Education (BMBF) [03EK3013]
FX This work was supported as part of the Fluid Interface Reactions,
Structures and Transport (FIRST) Center, an Energy Frontier Research
Center funded by the U.S. Department of Energy, Office of Science,
Office of Basic Energy. VP and EP acknowledge funding from the German
Federal Ministry for Research and Education (BMBF) in support of the
nanoEES3D project (award number 03EK3013) as part of the
strategic funding initiative energy storage framework. VP thanks Dr.
Atchison for helpful discussions and Prof. Arzt for his continuing
support (both at INM). The authors also thank Dr. Ganesh (Oak Ridge
National Laboratories) for providing the raw data for the OLC model
shown in Figure 1B and Dr. Niu (formerly at Drexel, now at MIT) for his
assistance with TEM and Dr. Alliger (ORNL) for synthesizing the pyrene
quinone. Mr. Karos (INM) is thanked for his kind assistance with XRD
measurements.
NR 60
TC 49
Z9 49
U1 15
U2 114
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 2211-2855
J9 NANO ENERGY
JI Nano Energy
PD SEP
PY 2013
VL 2
IS 5
BP 702
EP 712
DI 10.1016/j.nanoen.2013.08.003
PG 11
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Applied
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 240YS
UT WOS:000326134200014
ER
PT J
AU Sun, YG
AF Sun, Yugang
TI Lithium ion conducting membranes for lithium-air batteries
SO NANO ENERGY
LA English
DT Review
DE lithium ion conducting membranes; lithium-air batteries; solid state
lithium ion; electrolyte
ID LI-AIR; SECONDARY BATTERIES; SOLID ELECTROLYTES; CRYSTAL-STRUCTURE;
THIO-LISICON; ELECTRICAL-CONDUCTIVITY; SUPERIONIC CONDUCTIVITY;
HETEROGENEOUS SOLIDS; POLYMER ELECTROLYTES; AQUEOUS-ELECTROLYTE
AB Materials design and synthesis is critical for reliable fabrication of stable and high-performance lithium-air batteries that are competitive with other energy delivery systems. Intensive research activities have focused on the development of efficient cathode catalysts and stable electrolytes in the past several years and many review articles are already available. This review aims on lithium ion conducting membranes that are barely studied although they are essentially indispensible for building batteries composed of aqueous electrolytes and batteries composed of non-aqueous electrolytes for long-term operation. In a typical lithium-air battery cell, a lithium ion conducting membrane is sandwiched between the lithium metal anode and the air cathode to prevent the lithium metal anode from reacting with poison species (e.g., water, oxygen, etc.) diffused from cathode to anode, leading to a significant increase in lifetime of the battery. A number of solid materials including polymer/polymer-ceramic composites, non-oxide inorganic compounds, perovskite-type oxides, garnet-type oxides, gamma-Li3PO4 oxides, NASICON-type oxides, and single-crystalline silicon that exhibit good lithium-ion conductivity are comprehensively summarized and discussed in this review. Although only a few of NASICON-type oxides and single-crystalline silicon have been evaluated as the lithium ion conducting membranes in lithium-air battery cells, all of the solid materials summarized in this review and their possible derivative composites are also promising to be developed as lithium ion conducting membranes for lithium-air batteries. This review is also expected to be an advocate for research in lithium ion conducting membranes. (C) 2013 Elsevier Ltd. All rights reserved.
C1 Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Sun, YG (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM ygsun@anl.gov
RI Sun, Yugang /A-3683-2010
OI Sun, Yugang /0000-0001-6351-6977
FU Center for Nanoscale Materials, a U.S. Department of Energy, Office of
Science, Office of Basic Energy Sciences User Facilit
[DE-AC02-06CH11357]
FX This work was performed at the Center for Nanoscale Materials, a U.S.
Department of Energy, Office of Science, Office of Basic Energy Sciences
User Facility under Contract no. DE-AC02-06CH11357.
NR 108
TC 35
Z9 36
U1 45
U2 485
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 2211-2855
J9 NANO ENERGY
JI Nano Energy
PD SEP
PY 2013
VL 2
IS 5
BP 801
EP 816
DI 10.1016/j.nanoen.2013.02.003
PG 16
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Applied
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 240YS
UT WOS:000326134200027
ER
PT J
AU Xia, T
Zhang, W
Li, WJ
Oyler, NA
Liu, G
Chen, XB
AF Xia, Ting
Zhang, Wei
Li, Wenjing
Oyler, Nathan A.
Liu, Gao
Chen, Xiaobo
TI Hydrogenated surface disorder enhances lithium ion battery performance
SO NANO ENERGY
LA English
DT Article
DE Titanium dioxide nanocrystals; Hydrogenation; Surface disorder;
Crystalline core; Lithium ion battery
ID TIO2 NANOTUBE ARRAYS; ANATASE TIO2; TITANIUM-DIOXIDE; PHOTOCATALYTIC
ACTIVITY; ELECTRONIC-STRUCTURE; INTERCALATION; NANOMATERIALS;
ABSORPTION; INSERTION; LI
AB TiO2, well known for its photocatalytic properties, has also been studied as a safer anode material for lithium ion batteries compared to graphite. However, improvements are needed to address the limited lithium ion diffusion within the host and the structural distortion during lithium insertion/extraction. Here, we demonstrate that a thin layer of hydrogenated surface disorder on the crystalline TiO2 electrode induces better electrochemical energy storage performance, better charge/discharge rate performance, larger capacity and longer stability. The reasons for these improvements are explored in terms of the facilitation of lithium ion transport within the disordered layer and the alleviation of structural distortion during the lithium insertion/extraction process, and the faster ion exchange rates in the hydrogenated disordered layer. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Xia, Ting; Li, Wenjing; Oyler, Nathan A.; Chen, Xiaobo] Univ Missouri, Dept Chem, Kansas City, MO 64110 USA.
[Zhang, Wei; Liu, Gao] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Energy Technol Dept, Berkeley, CA 94720 USA.
RP Liu, G (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Energy Technol Dept, Berkeley, CA 94720 USA.
EM GLiu@lbl.gov; Chenxiaobo@umkc.edu
FU College of Arts and Sciences, University of Missouri-Kansas City;
University of Missouri Research Board; Office of Science, Office of
Basic Energy Sciences of the U.S. Department of Energy; United State
Department of Energy [DE-AC03-765F00098]
FX X.C. thanks Samuel S. Mao at Lawrence Berkeley National Laboratory for
helping on the hydrogenation of the TiO2 nanocrystals. X.C.
thanks the support from College of Arts and Sciences, University of
Missouri-Kansas City, the University of Missouri Research Board, and the
generous gift from Dow Kokam. TEM work was performed at the National
Center for Electron Microscopy, which is supported by the Office of
Science, Office of Basic Energy Sciences of the U.S. Department of
Energy. G. L. thanks the fund by the Assistant Secretary for Energy
Efficiency, Office of Vehicle Technologies of the United State
Department of Energy under Contract no. DE-AC03-765F00098.
NR 45
TC 40
Z9 40
U1 5
U2 59
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 2211-2855
J9 NANO ENERGY
JI Nano Energy
PD SEP
PY 2013
VL 2
IS 5
BP 826
EP 835
DI 10.1016/j.nanoen.2013.02.005
PG 10
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Applied
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 240YS
UT WOS:000326134200029
ER
PT J
AU McGrail, BP
Thallapally, PK
Blanchard, J
Nune, SK
Jenks, JJ
Dang, LX
AF McGrail, B. P.
Thallapally, P. K.
Blanchard, J.
Nune, S. K.
Jenks, J. J.
Dang, L. X.
TI Metal-organic heat carrier nanofluids
SO NANO ENERGY
LA English
DT Article
DE Nanofluid; MOF; ORC; Geothermal; Energy efficiency
ID PRUSSIAN BLUE ANALOGS; THERMAL-CONDUCTIVITY; NANOPARTICLES; FRAMEWORK;
ENHANCEMENT; ADSORPTION; ROUTE; NANOCRYSTALS; POLYMERS; CAPTURE
AB Nanofluids, dispersions of metal or oxide nanoparticles in a base working fluid, are being intensively studied due to improvements they offer in thermal properties of the working fluid. However, these benefits have been erratically demonstrated and proven impacts on thermal conductivity are modest and well described from long-established effective medium theory. In this paper, we describe a new class of metal-organic heat carrier (MOHC) nanofluid that offers potential for a larger performance boost in thermal vapor-liquid compression cycles. MOHCs are nanophase porous coordination solids designed to reversibly uptake the working fluid molecules in which the MOHCs are suspended. Additional heat can be extracted in a heat exchanger or solar collector from the endothermic enthalpy of desorption, which is then released as the nanofluid transits through a power generating device such as a turboexpander. Calculations for an R123 MOHC nanofluid indicated potential for up to 15% increase in power output. Capillary tube experiments show that liquid-vapor transitions occur without nanoparticle deposition on the tube walls provided entrance Reynolds number exceeds approximately 100. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [McGrail, B. P.; Thallapally, P. K.; Blanchard, J.; Nune, S. K.; Jenks, J. J.; Dang, L. X.] Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99352 USA.
RP McGrail, BP (reprint author), Pacific NW Natl Lab, Energy & Environm Directorate, 902 Battelle Blvd, Richland, WA 99352 USA.
EM pete.mcgrail@pnnl.gov
RI thallapally, praveen/I-5026-2014
OI thallapally, praveen/0000-0001-7814-4467
FU U.S. Department of Energy (DOE), Office of Energy Efficiency and
Renewable Energy Geothermal Technologies Program under Funding
Opportunity Announcement [DE-PS36-09G099017]; Battelle Memorial
Institute [DE-AC05-76RL01830]
FX This work was supported by the U.S. Department of Energy (DOE), Office
of Energy Efficiency and Renewable Energy Geothermal Technologies
Program under Funding Opportunity Announcement DE-PS36-09G099017. The
authors gratefully acknowledge the support and encouragement Mr. Greg
Stillman at the U.S. DOE. The Pacific Northwest National Laboratory is
operated for the U.S. DOE by Battelle Memorial Institute under contract
DE-AC05-76RL01830.
NR 58
TC 7
Z9 7
U1 6
U2 41
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 2211-2855
J9 NANO ENERGY
JI Nano Energy
PD SEP
PY 2013
VL 2
IS 5
BP 845
EP 855
DI 10.1016/j.nanoen.2013.02.007
PG 11
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Applied
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 240YS
UT WOS:000326134200031
ER
PT J
AU Ulum, S
Holmes, N
Barr, M
Kilcoyne, ALD
Bin Gong, B
Zhou, XJ
Belcher, W
Dastoor, P
AF Ulum, Syahrul
Holmes, Natalie
Barr, Matthew
Kilcoyne, A. L. David
Bin Gong, Bill
Zhou, Xiaojing
Belcher, Warwick
Dastoor, Paul
TI The role of miscibility in polymer:fullerene nanoparticulate organic
photovoltaic devices
SO NANO ENERGY
LA English
DT Article
DE Morphology; OPV; Nanoparticle; Solar Paint
ID POLYMER SOLAR-CELLS; PHASE-SEPARATION; BLENDS; WATER
AB Polymer:fullerene blends are an attractive materials system for organic photovoltaic applications and conventionally are processed into thin films via chlorinated solvent based routes. Recently, the fabrication of OPV devices from water-dispersed nanoparticulate materials (solar paint) has attracted increasing interest since it offers the potential of morphological control coupled with device processing in the absence of an organic solvent. However, to date there have been no studies of the effect of different acceptors in the nanoparticle structure. In this letter, we report the performance of nanoparticulate organic photovoltaic (NPOPV) devices fabricated from poly(3-hexylthiophene) (P3HT):indene-C-60-bisadduct (ICBA) blends. These devices exhibit power conversion efficiencies of 2.5%, which is the highest so far reported for NPOPV cells. Using a combination of scanning transmission X-ray microscopy and thermodynamic modelling we show that the improved performance is driven by the enhanced miscibility of ICBA in P3HT, which results in a more efficient intermixed structure in the annealed devices. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Ulum, Syahrul; Holmes, Natalie; Barr, Matthew; Zhou, Xiaojing; Belcher, Warwick; Dastoor, Paul] Univ Newcastle, Ctr Organ Elect, Callaghan, NSW 2308, Australia.
[Kilcoyne, A. L. David] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Bin Gong, Bill] Univ New S Wales, Mark Wainwright Analyt Ctr, Sydney, NSW 2052, Australia.
RP Dastoor, P (reprint author), Univ Newcastle, Ctr Organ Elect, Callaghan, NSW 2308, Australia.
EM Paul.Dastoor@newcastle.edu.au
RI Kilcoyne, David/I-1465-2013
FU Office of Science, Office of Basic Energy Sciences, of the U.S.
Department of Energy [DE-AC02-05CH11231]; Australian Solar Institute;
Indonesian Directorate General of Higher Education (DIKTI); Commonwealth
of Australia
FX The University of Newcastle is gratefully acknowledged for a PhD
scholarship (MB). The TEM images were collected using the Electron
Microscope and X-Ray Unit at the University of Newcastle. The Australian
Solar Institute is acknowledged for a PhD scholarship (NH). The
Indonesian Directorate General of Higher Education (DIKTI) is
acknowledged for PhD scholarship funding (SU). We acknowledge financial
support from the Commonwealth of Australia through the Access to Major
Research Facilities Program. The ALS is supported by the Director,
Office of Science, Office of Basic Energy Sciences, of the U.S.
Department of Energy under Contract No. DE-AC02-05CH11231.
NR 21
TC 27
Z9 27
U1 4
U2 47
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 2211-2855
J9 NANO ENERGY
JI Nano Energy
PD SEP
PY 2013
VL 2
IS 5
BP 897
EP 905
DI 10.1016/j.nanoen.2013.03.009
PG 9
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Applied
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 240YS
UT WOS:000326134200037
ER
PT J
AU Shen, SH
Kronawitter, CX
Jiang, JG
Guo, PH
Guo, LJ
Mao, SS
AF Shen, Shaohua
Kronawitter, Coleman X.
Jiang, Jiangang
Guo, Penghui
Guo, Liejin
Mao, Samuel S.
TI A ZnO/ZnO:Cr isostructural nanojunction electrode for
photoelectrochemical water splitting
SO NANO ENERGY
LA English
DT Article
DE ZnO nanorods; Water splitting; Photoanodes; Nanojunction; Cr doping
ID NANOROD ARRAYS; PHOTOCATALYTIC PROPERTIES; OXIDE SEMICONDUCTORS;
HYDROGEN GENERATION; THIN-FILMS; ZNO; CR; SPECTROSCOPY; PHOTOANODES;
PERFORMANCE
AB The fabrication and photoelectrochemical characterization of a ZnO/ZnO:Cr isostructural nanojunction electrode is presented. When compared to its constituent components the isostructural nanojunction showed superior performance for water splitting under simulated solar light and visible light (lambda> 510 nm) illumination. In the engineered structure, the presence of intra-bandgap states associated with Cr impurities increases optical absorption, and the nanorod morphology provides a direct pathway for transport of photo-excited electrons to the back contact. The overall photoelectrochemical performance of the ZnO/ZnO:Cr engineered structure is relatively low, however the concept may prove to be applicable to more optimized structures or material systems. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Shen, Shaohua; Jiang, Jiangang; Guo, Penghui; Guo, Liejin] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Int Res Ctr Renewable Energy, Xian 710049, Shaanxi, Peoples R China.
[Shen, Shaohua; Kronawitter, Coleman X.; Mao, Samuel S.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Dept Mech Engn, Environm Energy Technol Div, Berkeley, CA 94720 USA.
RP Shen, SH (reprint author), Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Int Res Ctr Renewable Energy, Xianning West Rd 28, Xian 710049, Shaanxi, Peoples R China.
EM shshen_xjtu@mail.xjtu.edu.cn; ssmao@lbl.gov
RI Shen, Shaohua/E-9507-2011
FU National Natural Science Foundation of China [51102194, 51121092];
Doctoral Program of the Ministry of Education [20110201120040]; Natural
Science Foundation of Shaanxi Province [2011JQ7017]; National Basic
Research Program of China [2009CB220000]; Fundamental Research Funds for
the Central Universities; U.S. Department of Energy, Office of Energy
Efficiency and Renewable Energy; NSF/CMMI [1036076]
FX The authors gratefully acknowledge the financial support of the National
Natural Science Foundation of China (No. 51102194, No. 51121092), the
Doctoral Program of the Ministry of Education (No. 20110201120040), the
Natural Science Foundation of Shaanxi Province (No. 2011JQ7017) and the
National Basic Research Program of China (No. 2009CB220000). One of the
authors (S. Shen) was supported by the "Fundamental Research Funds for
the Central Universities". This research has also been partially
supported by the U.S. Department of Energy, Office of Energy Efficiency
and Renewable Energy and NSF/CMMI under grant #1036076.
NR 39
TC 13
Z9 13
U1 3
U2 45
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 2211-2855
J9 NANO ENERGY
JI Nano Energy
PD SEP
PY 2013
VL 2
IS 5
BP 958
EP 965
DI 10.1016/j.nanoen.2013.03.017
PG 8
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Applied
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 240YS
UT WOS:000326134200044
ER
PT J
AU Dow, K
Berkhout, F
Preston, BL
AF Dow, Kirstin
Berkhout, Frans
Preston, Benjamin L.
TI Limits to adaptation to climate change: a risk approach
SO CURRENT OPINION IN ENVIRONMENTAL SUSTAINABILITY
LA English
DT Review
ID SOCIAL AMPLIFICATION; FRAMEWORK; UNCERTAINTY; DIMENSIONS; PERCEPTION;
GOVERNANCE; IMPACTS
AB As attention to adaptation to climate change increases, there is a growing call for adaptation approaches that focus on risk management. There is also greater recognition that the rate and magnitude of climate variability and change may exceed the limits to adaptation of socio-ecological systems. We offer an actor-centered, risk-based definition for adaptation limits in social systems. Specifically, we frame adaptation limits as the point at which an actor's objectives cannot be secured from intolerable risks through adaptive actions. These limits are significant because exceeding a limit will either result in intolerable losses on the affected actor or system, or precipitate a discontinuous (or transformational) change of behavior by actors. Such discontinuities in behavior have implications for the distribution of risks, with potentially significant governance consequences. We further argue that some adaptation limits are dynamic through time. We conclude with recommendations for further research into adaptation limits and challenges to risk governance.
C1 [Dow, Kirstin] Univ S Carolina, Dept Geog, Columbia, SC 29208 USA.
[Berkhout, Frans] Kings Coll London, Dept Geog, London WC2R 2LS, England.
[Preston, Benjamin L.] Oak Ridge Natl Lab, Climate Change Sci Inst, Oak Ridge, TN 37831 USA.
RP Dow, K (reprint author), Univ S Carolina, Dept Geog, 709 Bull St,Callcott Bldg, Columbia, SC 29208 USA.
EM Kdow@sc.edu
RI Berkhout, Frans/N-4196-2013; Preston, Benjamin/B-9001-2012
OI Berkhout, Frans/0000-0001-8668-0470; Preston,
Benjamin/0000-0002-7966-2386
FU European Commission
FX We would like to acknowledge valuable discussions with Mozaharul Alam,
Habiba Gitay, Richard Klein, Guy Midgley, Rebecca Shaw, James Thurlow,
and other generous colleagues from IPCC AR5 Working Group 2 who took
time to listen and comment on this approach. Frans Berkhout would also
like to acknowledge support of the European Commission-funded RESPONSES
project in conducting this research. The shortcomings remain our
responsibility.
NR 42
TC 15
Z9 15
U1 3
U2 42
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1877-3435
EI 1877-3443
J9 CURR OPIN ENV SUST
JI Curr. Opin. Environ. Sustain.
PD SEP
PY 2013
VL 5
IS 3-4
BP 384
EP 391
DI 10.1016/j.cosust.2013.07.005
PG 8
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Environmental Sciences
SC Science & Technology - Other Topics; Environmental Sciences & Ecology
GA 235SR
UT WOS:000325741500016
ER
PT J
AU Alexandrov, BS
Bishop, AR
Zahariev, N
Kostadinov, I
AF Alexandrov, B. S.
Bishop, A. R.
Zahariev, N.
Kostadinov, I.
TI Dispersed stable states spectrum of the wave equation with space-time
periodic potential
SO EPL
LA English
DT Article
ID SPONTANEOUS EMISSION; FIELDS
AB We study the stable states of the wave equation with d-spatial and 1-time dimensions and with space-time periodic potential. The dispersed stable states spectrum of such (d + 1)periodic wave equation is due to the incommensurability of the speed of light and the ratio of space and time periods. A Bloch-Floquet analysis leads to a (d + 1)-cube as a reduced Brillouin zone, but because of the speed incommensurability the stable states in this cube may form a spectrum of sets with a reduced dimensionality. For electromagnetic waves in photonic crystals the medium may amplify some waves with lengths fitting the crystal lattice. The energy from the external field can be pumped to the waves via the dipole moment oscillations. Copyright (C) EPLA, 2013
C1 [Alexandrov, B. S.; Bishop, A. R.] Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
[Zahariev, N.; Kostadinov, I.] Ohio State Univ, Columbus, OH 43210 USA.
RP Alexandrov, BS (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA.
OI Alexandrov, Boian/0000-0001-8636-4603
FU National Nuclear Security Administration of the U.S. Department of
Energy at Los Alamos National Laboratory [DE-AC52-06NA25396]
FX Research at Los Alamos National Laboratory was carried out under the
auspices of the National Nuclear Security Administration of the U.S.
Department of Energy at Los Alamos National Laboratory under Contract
No. DE-AC52-06NA25396.
NR 27
TC 0
Z9 0
U1 0
U2 4
PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
EI 1286-4854
J9 EPL-EUROPHYS LETT
JI EPL
PD SEP
PY 2013
VL 103
IS 5
AR 50001
DI 10.1209/0295-5075/103/50001
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 240JS
UT WOS:000326092600001
ER
PT J
AU Arsenijevic, S
Petrovic, C
Forro, L
Akrap, A
AF Arsenijevic, Stevan
Petrovic, Cedomir
Forro, Laszlo
Akrap, Ana
TI Manifestation of the spin textures in the thermopower of MnSi
SO EPL
LA English
DT Article
ID PHASE-TRANSITIONS; LIQUID; METAL
AB To identify possible spin texture contributions to thermoelectric transport, we present a detailed temperature and pressure dependence of thermopower S in MnSi, as well as a lowtemperature study of S in a magnetic field. We find that S/T reconstructs the (p, T) phase diagram of MnSi encompassing the Fermi liquid, partially ordered, and non-Fermi-liquid phases. Our results indicate that the latter two phases have essentially the same nature. In the partially ordered phase, S(T) is strongly enhanced, which may be understood as a spiral-fluctuation-driven phase. A low-temperature upturn in S/T pertaining to the partial-order phase persists up to the highest pressure, 24 kbar. Contrarily, a small suppression of S(T) is observed in the ordered skyrmion lattice A phase. Copyright (C) EPLA, 2013
C1 [Arsenijevic, Stevan; Forro, Laszlo] Ecole Polytech Fed Lausanne, Inst Phys Matiere Complexe, CH-1015 Lausanne, Switzerland.
[Petrovic, Cedomir] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
[Akrap, Ana] Univ Geneva, CH-1211 Geneva 4, Switzerland.
RP Arsenijevic, S (reprint author), Ecole Polytech Fed Lausanne, Inst Phys Matiere Complexe, CH-1015 Lausanne, Switzerland.
RI Akrap, Ana/G-1409-2013; Petrovic, Cedomir/A-8789-2009
OI Akrap, Ana/0000-0003-4493-5273; Petrovic, Cedomir/0000-0001-6063-1881
FU Swiss NSF; NCCR MaNEP; U.S. Department of Energy by Brookhaven Science
Associates [DE-Ac02-98CH10886]; "Boursieres d'Excellence" of the
University of Geneva
FX We would like to thank A. Rosch, F. KRUGER, D. VAN DER MAREL and K.
BEHNIA for useful discussions, and N. Miller for helpful comments. This
research was supported by the Swiss NSF and its NCCR MaNEP. Part of this
work was carried out at BNL, operated for the U.S. Department of Energy
by Brookhaven Science Associates DE-Ac02-98CH10886 (CP). AA acknowledges
funding from "Boursieres d'Excellence" of the University of Geneva.
NR 26
TC 1
Z9 1
U1 1
U2 15
PU EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
PI MULHOUSE
PA 6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
SN 0295-5075
EI 1286-4854
J9 EPL-EUROPHYS LETT
JI EPL
PD SEP
PY 2013
VL 103
IS 5
AR 57015
DI 10.1209/0295-5075/103/57015
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 240JS
UT WOS:000326092600033
ER
PT J
AU Saxena, S
Bedoya, ID
Shah, N
Phadke, A
AF Saxena, Samveg
Dario Bedoya, Ivan
Shah, Nihar
Phadke, Amol
TI Understanding Loss Mechanisms and Identifying Areas of Improvement for
HCCI Engines Using Detailed Exergy Analysis
SO JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE
ASME
LA English
DT Article
ID COMBUSTION
AB This paper presents a detailed exergy analysis of homogeneous charge compression ignition (HCCI) engines, including a crank-angle resolved breakdown of mixture exergy and exergy destruction. Exergy analysis is applied to a multizone HCCI simulation including detailed chemical kinetics. The HCCI simulation is validated against engine experiments for ethanol-fueled operation. The exergy analysis quantifies the relative importance of different loss mechanisms within HCCI engines over a range of engine operating conditions. Specifically, four loss mechanisms are studied for their relative impact on exergy losses, including (1) the irreversible combustion process (16.4%-21.5%), (2) physical exergy lost to exhaust gases (12.0%-18.7%), (3) heat losses (3.9%-17.1%), and (4) chemical exergy lost to incomplete combustion (4.7%-37.8%). The trends in each loss mechanism are studied in relation to changes in intake pressure, equivalence ratio, and engine speed as these parameters are directly used to vary engine power output. This exergy analysis methodology is proposed as a tool to inform research and design processes, particularly by identifying the relative importance of each loss mechanism in determining engine operating efficiency.
C1 [Saxena, Samveg; Shah, Nihar; Phadke, Amol] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Dario Bedoya, Ivan] Univ Antioquia, Medellin, Colombia.
RP Saxena, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd,90-2138, Berkeley, CA 94720 USA.
EM samveg@berkeley.edu; ibedoyac@udea.edu.co; nkshah@lbl.gov;
aaphadke@lbl.gov
FU Office of Science, of the U.S. Department of Energy [DE-AC02-05CH11231]
FX This study is part of a research effort at Lawrence Berkeley National
Laboratory that is using exergy analysis as a research portfolio
analysis tool to quantify and compare the efficiency gains that can be
achieved by guiding the strategic direction of research and development
funding in various technology areas. This work was supported by the
Director, Office of Science, of the U.S. Department of Energy under
Contract No. DE-AC02-05CH11231. The authors thank our readers for
choosing this article. We welcome any feedback or questions of the
topics discussed in this article, or discussion of emerging engine or
vehicle powertrain technologies. In particular, we welcome discussions
on potential research collaborations to develop exergy analysis for
emerging engine and vehicle powertrain technologies.
NR 24
TC 1
Z9 1
U1 0
U2 3
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0742-4795
EI 1528-8919
J9 J ENG GAS TURB POWER
JI J. Eng. Gas. Turbines Power-Trans. ASME
PD SEP
PY 2013
VL 135
IS 9
AR 091505
DI 10.1115/1.4024589
PG 10
WC Engineering, Mechanical
SC Engineering
GA 241IC
UT WOS:000326158900010
ER
PT J
AU Roach, LD
Charles, CD
Field, DB
Guilderson, TP
AF Roach, Lydia D.
Charles, Christopher D.
Field, David B.
Guilderson, Thomas P.
TI Foraminiferal radiocarbon record of northeast Pacific decadal subsurface
variability
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
DE North Pacific; decadal variability; benthic foraminifera; Santa Barbara
Basin; radiocarbon
ID SANTA-BARBARA BASIN; CALIFORNIA CURRENT SYSTEM; SURFACE OCEAN
RADIOCARBON; EASTERN TROPICAL PACIFIC; SOUTHERN CALIFORNIA; INTERMEDIATE
WATER; CLIMATE-CHANGE; EL-NINO; CONTINENTAL-MARGIN; CARBON OXIDATION
AB The decadal dynamics of the subsurface North Pacific Ocean are largely inaccessible beyond sparse instrumental observations spanning the last 20 years. Here we present a approximate to 200 year long record of benthic foraminiferal radiocarbon (C-14), extracted at biennial resolution from the annually laminated sediments at the Santa Barbara Basin (SBB) depocenter (approximate to 600 m). The close match between core top benthic foraminiferal C-14 values and the C-14 of seawater dissolved inorganic carbon (DIC) suggests that benthic foraminifera faithfully capture the bottom water radiocarbon concentrations, as opposed to that of the deeper (>0.5 cm) sediment porewater zone. The full time series of benthic foraminiferal C-14 displays significant variability on decadal timescales, with excursions on the order of 40. These excursions are overprinted by a unidirectional trend over the late 20th century that likely reflects the sedimentary incorporation of bomb radiocarbon (via remineralized particulate organic carbon). We isolate this trend by means of a one-dimensional oxidation model, which considers the possible contribution of remineralized particles to the total ambient carbon pool. This oxidation model also considers the possible influence of carbon with a variety of sources (ages). Though variable oxidation of preaged carbon could exert a strong influence on benthic foraminiferal radiocarbon variability, the totality of evidence points to the vertical density structure along the Southern California Margin (SCM) as the primary driver of the SBB benthic foraminiferal C-14 record. For example, intervals characterized by significantly lower C-14 values correspond to periods of enhanced upwelling and subsurface equatorward flow along the SCM.
C1 [Roach, Lydia D.; Charles, Christopher D.] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
[Field, David B.] Hawaii Pacific Univ, Dept Marine Sci, Honolulu, HI USA.
[Guilderson, Thomas P.] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Guilderson, Thomas P.] Univ Calif Santa Cruz, Inst Marine Sci, Santa Cruz, CA 95064 USA.
RP Charles, CD (reprint author), Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
EM ccharles@ucsd.edu
FU Petroleum Research Fund grant; University of California Ship Funds
grant; U.S. Department of Energy [W-7405-Eng-48, DE-AC52-07NA27344]
FX This work was supported by a Petroleum Research Fund grant (to C. D. C.)
and by a University of California Ship Funds grant (to L. D. R.). We
thank Dan Cayan, Ellen Druffel, Manu Di Lorenzo, and Jeff Severinghaus
for valuable discussion. We appreciate the thoughtful comments of three
anonymous reviewers, who helped improve the manuscript substantially. A
portion of this work was performed under the auspices of the U.S.
Department of Energy, under contract W-7405-Eng-48 and
DE-AC52-07NA27344.
NR 88
TC 1
Z9 1
U1 4
U2 19
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9275
EI 2169-9291
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD SEP
PY 2013
VL 118
IS 9
BP 4317
EP 4333
DI 10.1002/jgrc.20274
PG 17
WC Oceanography
SC Oceanography
GA 242HQ
UT WOS:000326230200022
ER
PT J
AU English, TS
Phinney, LM
Hopkins, PE
Serrano, JR
AF English, Timothy S.
Phinney, Leslie M.
Hopkins, Patrick E.
Serrano, Justin R.
TI Mean Free Path Effects on the Experimentally Measured Thermal
Conductivity of Single-Crystal Silicon Microbridges
SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
LA English
DT Review
DE phonon mean free path; short pulsed laser heating; phonon spectroscopy;
thermal conductivity
ID PHONON-BOUNDARY SCATTERING; LOW-TEMPERATURES; METAL-FILMS; TRANSPORT;
SI; DEVICES; LAYERS; THERMOREFLECTANCE; THERMOMETRY; MODEL
AB Accurate thermal conductivity values are essential for the successful modeling, design, and thermal management of microelectromechanical systems (MEMS) and devices. However, the experimental technique best suited to measure the thermal conductivity of these systems, as well as the thermal conductivity itself, varies with the device materials, fabrication processes, geometry, and operating conditions. In this study, the thermal conductivities of boron doped single-crystal silicon microbridges fabricated using silicon-on-insulator (SOI) wafers are measured over the temperature range from 80 to 350K. The microbridges are 4.6mm long, 125 mu m tall, and either 50 or 85 mu m wide. Measurements on the 85 mu m wide microbridges are made using both steady-state electrical resistance thermometry (SSERT) and optical time-domain thermoreflectance (TDTR). A thermal conductivity of 77 Wm(-1) K-1 is measured for both microbridge widths at room temperature, where the results of both experimental techniques agree. However, increasing discrepancies between the thermal conductivities measured by each technique are found with decreasing temperatures below 300K. The reduction in thermal conductivity measured by TDTR is primarily attributed to a ballistic thermal resistance contributed by phonons with mean free paths larger than the TDTR pump beam diameter. Boltzmann transport equation (BTE) modeling under the relaxation time approximation (RTA) is used to investigate the discrepancies and emphasizes the role of different interaction volumes in explaining the underprediction of TDTR measurements.
C1 [English, Timothy S.; Phinney, Leslie M.; Serrano, Justin R.] Sandia Natl Labs, Engn Sci Ctr, Albuquerque, NM 87185 USA.
[English, Timothy S.] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA.
[Hopkins, Patrick E.] Univ Virginia, Dept Mech & Aerosp Engn, Charlottesville, VA 22904 USA.
RP English, TS (reprint author), Sandia Natl Labs, Engn Sci Ctr, POB 5800, Albuquerque, NM 87185 USA.
EM tsengli@sandia.gov; lmphinn@sandia.gov; phopkins@virginia.edu;
jrserra@sandia.gov
FU U.S. Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]; United States Government
FX The authors thank Edward Piekos for insights and discussion, Sandia
National Laboratories SOI MEMS personnel for test structure fabrication,
and Katie Francis for test structure design and layout. This work was
performed, in part, at the Center for Integrated Nanotechnologies, a
U.S. Department of Energy, Office of Basic Energy Sciences user
facility. Sandia National Laboratories is a multiprogram laboratory
managed and operated by Sandia Corporation, a wholly owned subsidiary of
Lockheed Martin Corporation, for the U.S. Department of Energy's
National Nuclear Security Administration under Contract No.
DE-AC04-94AL85000. The United States Government retains, and the
publisher, by accepting the article for publication, acknowledges, that
the United States Government retains a nonexclusive, paid-up,
irrevocable, world-wide license to publish or reproduce the published
form of this manuscript, or allow others to do so, for United States
Government purposes.
NR 54
TC 6
Z9 6
U1 1
U2 28
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0022-1481
EI 1528-8943
J9 J HEAT TRANS-T ASME
JI J. Heat Transf.-Trans. ASME
PD SEP
PY 2013
VL 135
IS 9
SI SI
AR 091103
DI 10.1115/1.4024357
PG 7
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA 241LZ
UT WOS:000326169800005
ER
PT J
AU Fourspring, K
Ninkov, Z
Fodness, BC
Robberto, M
Heap, S
Kim, AG
AF Fourspring, Kenneth
Ninkov, Zoran
Fodness, Bryan C.
Robberto, Massimo
Heap, Sally
Kim, Alex G.
TI Proton radiation testing of digital micromirror devices for space
applications
SO OPTICAL ENGINEERING
LA English
DT Article
DE digital micromirror devices; microelectrical mechanical systems; proton
irradiation
ID MULTIOBJECT SPECTROMETER; MEMS; RELIABILITY; PERFORMANCE
AB Scientists are interested in using digital micromirror devices (DMD) as slit-masks in multiobject spectrometers on future space missions. A favored orbit is at the second Lagrangian point (L2). A requirement for mission planning is to determine how long such microelectrical mechanical systems devices would remain operational given the L2 radiation environment, which is primarily composed of solar protons and cosmic rays. To this end, we initiated DMD proton testing. Three DMDs were irradiated with high-energy protons (35 to 50 MeV) at the Lawrence Berkeley National Laboratory 88 in. Cyclotron. Assuming a typical space-craft shielding of 100 mils of aluminum, our tests imply that DMDs remain fully operable in a five-year mission at L2 with a margin of safety of 4.5. (C) 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
C1 [Fourspring, Kenneth; Ninkov, Zoran; Fodness, Bryan C.] Rochester Inst Technol, Rochester, NY 14623 USA.
[Robberto, Massimo] Space Telescope Sci Inst, Baltimore, MD 21212 USA.
[Heap, Sally] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Kim, Alex G.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Fourspring, K (reprint author), Rochester Inst Technol, 54 Lomb Mem Dr, Rochester, NY 14623 USA.
EM kdf5036@rit.edu
OI Robberto, Massimo/0000-0002-9573-3199
NR 24
TC 3
Z9 3
U1 0
U2 3
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD SEP
PY 2013
VL 52
IS 9
AR 091807
DI 10.1117/1.OE.52.9.091807
PG 11
WC Optics
SC Optics
GA 241EP
UT WOS:000326149500032
ER
PT J
AU Martinez-Galarce, D
Soufli, R
Windt, DL
Bruner, M
Gullikson, E
Khatri, S
Spiller, E
Robinson, JC
Baker, S
Prast, E
AF Martinez-Galarce, Dennis
Soufli, Regina
Windt, David L.
Bruner, Marilyn
Gullikson, Eric
Khatri, Shayna
Spiller, Eberhard
Robinson, Jeff C.
Baker, Sherry
Prast, Evan
TI Multisegmented, multilayer-coated mirrors for the Solar Ultraviolet
Imager
SO OPTICAL ENGINEERING
LA English
DT Article
DE Solar Ultraviolet Imager; extreme ultraviolet solar physics; extreme
ultraviolet optics; multilayer-coated optics; power spectral density of
extreme ultraviolet optics; extreme ultraviolet scattering; surface
microroughness; extreme ultraviolet reflectivity
ID TELESCOPE; PERFORMANCE; IRRADIANCE; MISSION; REGION; CORONA
AB The Solar Ultraviolet Imager (SUVI) is one of the several instruments that will fly on board the next generation of Geostationary Operational Environmental Satellites R-U platforms, as part of the National Oceanic and Atmospheric Administration's space weather monitoring fleet. SUVI is a generalized Cassegrain telescope that employs multilayer-coated optics that operate in six extreme ultraviolet (EUV) narrow bandpasses centered at 93.9, 131.2, 171.1, 195.1, 284.2 and 303.8 angstrom . The innovation of the design is that SUVI is the first EUV solar telescope that has six different wavelength channels accommodated on each mirror. And despite having six segmented multilayer-coatings, shadowing (due to the mask) is minimized allowing SUVI to exceed its effective area specifications. Once operational, SUVI will record full-disk, spectroheliograms every few minutes, where this data will be used to better understand the effects of solar produced EUV radiation on Earth and the near-Earth environment. The material presented discusses general aspects of the SUVI optical design, mirror fabrication, super polishing, and metrology carried out to verify optical surface quality and in-band, EUV reflectivity performance of the multilayer coatings. The power spectral density and EUV measurements are shown to exceed performance requirements and are critical for the overall calibration and monitoring of SUVI's throughput and imaging performance, once operational. (C) 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
C1 [Martinez-Galarce, Dennis] Galapagos Sci & Engn Grp, San Francisco, CA 94105 USA.
[Soufli, Regina; Spiller, Eberhard; Robinson, Jeff C.; Baker, Sherry] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Windt, David L.] Reflect Xray Opt, New York, NY 10027 USA.
[Bruner, Marilyn] Bermar Sci & Technol, Palo Alto, CA 94306 USA.
[Gullikson, Eric] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Khatri, Shayna] L3 Commun IOS Tinsley, Richmond, CA 94806 USA.
[Prast, Evan] Res Electroopt, Boulder, CO 80301 USA.
RP Martinez-Galarce, D (reprint author), Galapagos Sci & Engn Grp, 355 1st St,Suite 407, San Francisco, CA 94105 USA.
EM dsmartinezg@yahoo.com
FU SUVI program, under NASA contract [NNG07HW20C]; U.S. Department of
Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344];
University of California Lawrence Berkeley National Laboratory
[DE-AC03-76F00098]; Director, Office of Science; Office of Basic Energy
Sciences; U.S. Department of Energy [DE-AC0205CH11231]
FX We wish to thank the National Oceanic and Atmospheric Administration's
and the National Aeronautic and Space Adminstration's support for the
SUVI program, under NASA contract NNG07HW20C. This work was also, in
part, performed under the auspices of the U.S. Department of Energy by
Lawrence Livermore National Laboratory under Contract No.
DE-AC52-07NA27344, and by the University of California Lawrence Berkeley
National Laboratory under Contract No. DE-AC03-76F00098. The Advanced
Light Source is supported by the Director, Office of Science, Office of
Basic Energy Sciences, of the U.S. Department of Energy under Contract
No. DE-AC0205CH11231.
NR 29
TC 10
Z9 10
U1 0
U2 11
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD SEP
PY 2013
VL 52
IS 9
AR 095102
DI 10.1117/1.OE.52.9.095102
PG 15
WC Optics
SC Optics
GA 241EP
UT WOS:000326149500050
ER
PT J
AU Pershyn, YP
Gullikson, EM
Kondratenko, VV
Mamon, VV
Reutskaya, SA
Voronov, DL
Zubarev, EN
Artyukov, IA
Vinogradov, AV
AF Pershyn, Yuriy P.
Gullikson, Eric M.
Kondratenko, Valeriy V.
Mamon, Valentine V.
Reutskaya, Svetlana A.
Voronov, Dmitriy L.
Zubarev, Evgeniy N.
Artyukov, Igor A.
Vinogradov, Alexander Vladimirovich
TI Effect of working gas pressure on interlayer mixing in
magnetron-deposited Mo/Si multilayers
SO OPTICAL ENGINEERING
LA English
DT Article
DE x-ray multilayer mirrors; interfaces; composition; Ar pressure
influence; silicides
ID EXTREME-ULTRAVIOLET LITHOGRAPHY; SOFT-X-RAY; MOLYBDENUM-SILICON
MULTILAYERS; PHASE-SHIFT MASKS; BEAM-SPLITTERS; INTERFACE GROWTH;
OPTICS; MO; OPTIMIZATION; TRANSITION
AB By methods of cross-sectional transmission electron microscopy and small-angle x-ray scattering (lambda = 0.154 nm) the influence of Ar gas pressure (1 to 4 mTorr) on the growth of amorphous interfaces in Mo/Si multilayers (MLs) deposited by DC magnetron sputtering is studied. The significant reduction in the ML period, which is evident as a volumetric contraction, is observed in MLs deposited at Ar pressure where the mean-free path for the sputtered atoms is comparable with the magnetron-substrate distance. Some reduction in the thickness of the amorphous interlayers with Ar pressure increase is found, where the composition of the interlayers is enriched with molybdenum. The interface modification resulted in an increase in EUV reflectance of the Mo/Si MLs. (C) 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
C1 [Pershyn, Yuriy P.; Kondratenko, Valeriy V.; Mamon, Valentine V.; Reutskaya, Svetlana A.; Zubarev, Evgeniy N.] Natl Tech Univ, Kharkiv Polytech Inst, Met & Semicond Phys Dept, UA-61002 Kharkov, Ukraine.
[Gullikson, Eric M.; Voronov, Dmitriy L.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Artyukov, Igor A.; Vinogradov, Alexander Vladimirovich] PN Lebedev Phys Inst, Moscow 117942, Russia.
RP Pershyn, YP (reprint author), Natl Tech Univ, Kharkiv Polytech Inst, Met & Semicond Phys Dept, Frunze St 21, UA-61002 Kharkov, Ukraine.
EM persh@kpi.kharkov.ua
RI Artyukov, Igor/B-3105-2009; Vinogradov, Alexander/M-5331-2015
OI Artyukov, Igor/0000-0001-7915-697X;
FU US Department of Energy [DE-AC02-05CH11231]
FX Y. P. P. is acknowledged to ISKCON for improving the realization with
regard to the place of this work. This work was supported by the US
Department of Energy under contract number DE-AC02-05CH11231.
NR 75
TC 1
Z9 1
U1 3
U2 21
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD SEP
PY 2013
VL 52
IS 9
AR 095104
DI 10.1117/1.OE.52.9.095104
PG 10
WC Optics
SC Optics
GA 241EP
UT WOS:000326149500052
ER
PT J
AU Fan, JL
Yan, CS
Zhang, XB
Xu, CC
AF Fan, Jilian
Yan, Chengshi
Zhang, Xuebin
Xu, Changcheng
TI Dual Role for Phospholipid: Diacylglycerol Acyltransferase: Enhancing
Fatty Acid Synthesis and Diverting Fatty Acids from Membrane Lipids to
Triacylglycerol in Arabidopsis Leaves
SO PLANT CELL
LA English
DT Article
ID YEAST SACCHAROMYCES-CEREVISIAE; GLYCEROL-3-PHOSPHATE ACYLTRANSFERASE;
PLANT TRANSFORMATION; ESCHERICHIA-COLI; CARRIER PROTEIN; OIL CONTENT;
BIOSYNTHESIS; ACCUMULATION; METABOLISM; THALIANA
AB There is growing interest in engineering green biomass to expand the production of plant oils as feed and biofuels. Here, we show that PHOSPHOLIPID: DIACYLGLYCEROL ACYLTRANSFERASE1 (PDAT1) is a critical enzyme involved in triacylglycerol (TAG) synthesis in leaves. Overexpression of PDAT1 increases leaf TAG accumulation, leading to oil droplet overexpansion through fusion. Ectopic expression of oleosin promotes the clustering of small oil droplets. Coexpression of PDAT1 with oleosin boosts leaf TAG content by up to 6.4% of the dry weight without affecting membrane lipid composition and plant growth. PDAT1 overexpression stimulates fatty acid synthesis (FAS) and increases fatty acid flux toward the prokaryotic glycerolipid pathway. In the trigalactosyldiacylglycerol1-1 mutant, which is defective in eukaryotic thylakoid lipid synthesis, the combined overexpression of PDAT1 with oleosin increases leaf TAG content to 8.6% of the dry weight and total leaf lipid by fourfold. In the plastidic glycerol-3-phosphate acyltransferase1 mutant, which is defective in the prokaryotic glycerolipid pathway, PDAT1 overexpression enhances TAG content at the expense of thylakoid membrane lipids, leading to defects in chloroplast division and thylakoid biogenesis. Collectively, these results reveal a dual role for PDAT1 in enhancing fatty acid and TAG synthesis in leaves and suggest that increasing FAS is the key to engineering high levels of TAG accumulation in green biomass.
C1 [Fan, Jilian; Yan, Chengshi; Zhang, Xuebin; Xu, Changcheng] Brookhaven Natl Lab, Dept Biosci, Upton, NY 11973 USA.
RP Xu, CC (reprint author), Brookhaven Natl Lab, Dept Biosci, Upton, NY 11973 USA.
EM cxu@bnl.gov
RI Yan, Chengshi/O-5639-2014; zhang, xuebin/K-3361-2015
FU Division of Chemical Sciences, Geosciences, and Biosciences, Office of
Basic Energy Sciences of the U.S. Department of Energy [DEAC0298CH10886
(BO-163)]; Office of Basic Energy Sciences, U.S. Department of Energy
[DEAC02-98CH10886]
FX We thank John Ohlrogge for providing pdat1-2 mutant seeds. We also thank
John Shanklin, John Ohlrogge, and Jitao Zou for critical reading of the
article. This work was supported by the Division of Chemical Sciences,
Geosciences, and Biosciences, Office of Basic Energy Sciences of the
U.S. Department of Energy through Grant DEAC0298CH10886 (BO-163) to C.X.
Use of the transmission electron microscope and confocal microscope at
the Center of Functional Nanomaterials was supported by the Office of
Basic Energy Sciences, U.S. Department of Energy, under Contract
DEAC02-98CH10886.
NR 75
TC 40
Z9 42
U1 6
U2 42
PU AMER SOC PLANT BIOLOGISTS
PI ROCKVILLE
PA 15501 MONONA DRIVE, ROCKVILLE, MD 20855 USA
SN 1040-4651
EI 1532-298X
J9 PLANT CELL
JI Plant Cell
PD SEP
PY 2013
VL 25
IS 9
BP 3506
EP 3518
DI 10.1105/tpc.113.117358
PG 13
WC Biochemistry & Molecular Biology; Plant Sciences; Cell Biology
SC Biochemistry & Molecular Biology; Plant Sciences; Cell Biology
GA 242ZY
UT WOS:000326287100027
PM 24076979
ER
PT J
AU Lo, WC
Sposito, G
AF Lo, Wei-Cheng
Sposito, Garrison
TI Acoustic waves in unsaturated soils
SO WATER RESOURCES RESEARCH
LA English
DT Article
DE unsaturated soils; poroelasticity; acoustic waves
ID 2 IMMISCIBLE FLUIDS; ELASTIC POROUS-MEDIA; HYDRAULIC CONDUCTIVITY;
MOISTURE-CONTENT; PROPAGATION; POROELASTICITY; EQUATIONS; SOUND
AB Seminal papers by Brutsaert (1964) and Brutsaert and Luthin (1964) provided the first rigorous theoretical framework for examining the poroelastic behavior of unsaturated soils, including an important application linking acoustic wave propagation to soil hydraulic properties. Theoretical developments during the 50 years that followed have led Lo et al., (2005) to a comprehensive model of these phenomena, but the relationship of its elasticity parameters to standard poroelasticity parameters measured in hydrogeology has not been established. In the present study, we develop this relationship for three key parameters, the Gassman modulus, Skempton coefficient, and Biot-Willis coefficient by generalizing them to an unsaturated porous medium. We demonstrate the remarkable result that well-known and widely applied relationships among these parameters for a porous medium saturated by a single fluid are also valid under very general conditions for unsaturated soils. We show further that measurement of the Biot-Willis coefficient along with three of the six elasticity coefficients in the model of Lo et al. (2005) is sufficient to characterize poroelastic behavior. The elasticity coefficients in the model of Lo et al. (2005) are sensitive to the dependence of capillary pressure on water saturation and its viscous-drag coefficients are functions of relative permeability, implying that hysteresis in the water retention curve and hydraulic conductivity function should affect acoustic wave behavior in unsaturated soils. To quantify these as-yet unknown effects, we performed numerical simulations for Dune sand at two representative wave excitation frequencies. Our results show that the acoustic wave investigated by Brutsaert and Luthin (1964) propagates at essentially the same speed during imbibition and drainage, but is attenuated more during drainage than imbibition. Overall, effects on acoustic wave behavior caused by hysteresis become more significant as the excitation frequency increases.
C1 [Lo, Wei-Cheng] Natl Cheng Kung Univ, Dept Hydraul & Ocean Engn, Tainan 70101, Taiwan.
[Sposito, Garrison] Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA.
[Sposito, Garrison] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Lo, WC (reprint author), Natl Cheng Kung Univ, Dept Hydraul & Ocean Engn, Tainan 70101, Taiwan.
EM lowc@mail.ncku.edu.tw
FU National Science Council, Taiwan [NSC100-2628-E-006-033]
FX Gratitude is expressed for financial support to the National Science
Council, Taiwan, under contract NSC100-2628-E-006-033. Thanks also to
Ernest Majer, Lawrence Berkeley National Laboratory, for introducing the
authors to the intriguing problem of modeling poroelastic behavior.
Finally, many thanks to Wilfried Brutsaert for years of friendship and
an approach to hydrologic modeling that is both beautiful and true.
NR 35
TC 6
Z9 6
U1 2
U2 21
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0043-1397
EI 1944-7973
J9 WATER RESOUR RES
JI Water Resour. Res.
PD SEP
PY 2013
VL 49
IS 9
BP 5674
EP 5684
DI 10.1002/wrcr.20423
PG 11
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA 238ZO
UT WOS:000325991100039
ER
PT J
AU Chen, X
Ng, BM
Sun, Y
Tong, CH
AF Chen, X.
Ng, B. M.
Sun, Y.
Tong, C. H.
TI A computational method for simulating subsurface flow and reactive
transport in heterogeneous porous media embedded with flexible
uncertainty quantification
SO WATER RESOURCES RESEARCH
LA English
DT Article
DE uncertainty quantification; polynomial chaos; heterogeneous media;
reactive transport; stochastic finite element
ID WATER EQUATIONS MODEL; POLYNOMIAL CHAOS; DECOMPOSITION; VARIABLES;
SYSTEMS
AB In Chen et al. (2013), the fundamental concepts of the modular UQ methodology have been introduced for general multiphysics applications in which each physics module can be independently embedded with its internal UQ method (intrusive or nonintrusive) without losing the global uncertainty propagation property. In the current paper, we extend the modular UQ methodology to subsurface flow and reactive transport applications, which are characterized by high dimensionality in the stochastic space due to spatially random velocity field in randomly heterogeneous porous media. Specifically, we develop a scheme to reduce the dimension of the stochastic space. This is achieved via a doubly nested dimension reduction by applying Karhunen-Loeve expansion to the logarithmic hydraulic conductivity field, followed by Proper Orthogonal Decomposition to the velocity field. This scheme enables the modular UQ framework to handle spatially random models efficiently while maintaining solution accuracy. When compared against sampling-based nonintrusive UQ methods, the modular UQ method demonstrates a similar accuracy at a fraction of computational cost on designed numerical experiments.
C1 [Chen, X.; Tong, C. H.] Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94550 USA.
[Ng, B. M.] Lawrence Livermore Natl Lab, Computat Engn Div, Livermore, CA 94550 USA.
[Sun, Y.] Lawrence Livermore Natl Lab, Atmospher Earth & Energy Div, Livermore, CA 94550 USA.
RP Chen, X (reprint author), Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, 7000 East Ave, Livermore, CA 94550 USA.
EM chen73@llnl.gov
RI Chen, Xiao/K-3070-2014; Sun, Yunwei/C-9751-2010
FU U. S. Department of Energy Office of Advanced Scientific Computing
Research Applied Mathematics Program and performed under the auspices of
the U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX This research was funded by U. S. Department of Energy Office of
Advanced Scientific Computing Research Applied Mathematics Program and
performed under the auspices of the U.S. Department of Energy by
Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344.
NR 43
TC 2
Z9 2
U1 0
U2 10
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0043-1397
EI 1944-7973
J9 WATER RESOUR RES
JI Water Resour. Res.
PD SEP
PY 2013
VL 49
IS 9
BP 5740
EP 5755
DI 10.1002/wrcr.20454
PG 16
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA 238ZO
UT WOS:000325991100044
ER
PT J
AU Chaudhuri, A
Rajaram, H
Viswanathan, H
AF Chaudhuri, A.
Rajaram, H.
Viswanathan, H.
TI Early-stage hypogene karstification in a mountain hydrologic system: A
coupled thermohydrochemical model incorporating buoyant convection
SO WATER RESOURCES RESEARCH
LA English
DT Article
DE hypogene karst; calcite; dissolution kinetics; coupled process; buoyant
convection
ID CO2-WATER SYSTEMS; THERMAL SPRINGS; POROUS-MEDIA; DISSOLUTION;
FRACTURES; LIMESTONE; KINETICS; CAVES; FLOW; INSTABILITIES
AB The early stage of hypogene karstification is investigated using a coupled thermohydrochemical model of a mountain hydrologic system, in which water enters along a water table and descends to significant depth (approximate to 1 km) before ascending through a central high-permeability fracture. The model incorporates reactive alteration driven by dissolution/precipitation of limestone in a carbonic acid system, due to both temperature- and pressure-dependent solubility, and kinetics. Simulations were carried out for homogeneous and heterogeneous initial fracture aperture fields, using the FEHM (Finite Element Heat and Mass Transfer) code. Initially, retrograde solubility is the dominant mechanism of fracture aperture growth. As the fracture transmissivity increases, a critical Rayleigh number value is exceeded at some stage. Buoyant convection is then initiated and controls the evolution of the system thereafter. For an initially homogeneous fracture aperture field, deep well-organized buoyant convection rolls form. For initially heterogeneous aperture fields, preferential flow suppresses large buoyant convection rolls, although a large number of smaller rolls form. Even after the onset of buoyant convection, dissolution in the fracture is sustained along upward flow paths by retrograde solubility and by additional mixing corrosion effects closer to the surface. Aperture growth patterns in the fracture are very different from those observed in simulations of epigenic karst systems, and retain imprints of both buoyant convection and preferential flow. Both retrograde solubility and buoyant convection contribute to these differences. The paper demonstrates the potential value of coupled models as tools for understanding the evolution and behavior of hypogene karst systems.
C1 [Chaudhuri, A.] Indian Inst Technol, Dept Appl Mech, Madras 600036, Tamil Nadu, India.
[Rajaram, H.] Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA.
[Viswanathan, H.] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
RP Rajaram, H (reprint author), Univ Colorado, Engn Ctr ECOT 441, Engn Ctr Off Tower 441,428 UCB, Boulder, CO 80309 USA.
EM hari@colorado.edu
FU Institute of Physics and Planetary Physics at Los Alamos National
Laboratory [IGPP Geo 1714]
FX We gratefully acknowledge financial support from the Institute of
Physics and Planetary Physics at Los Alamos National Laboratory (grant
IGPP Geo 1714). We are grateful to Derek Ford, Daniel Doctor, Associate
Editor Daniel F. Garcia, and an anonymous reviewer for their comments
and suggestions.
NR 54
TC 12
Z9 12
U1 3
U2 15
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0043-1397
EI 1944-7973
J9 WATER RESOUR RES
JI Water Resour. Res.
PD SEP
PY 2013
VL 49
IS 9
BP 5880
EP 5899
DI 10.1002/wrcr.20427
PG 20
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA 238ZO
UT WOS:000325991100054
ER
PT J
AU Lu, D
Ye, M
Meyer, PD
Curtis, GP
Shi, XQ
Niu, XF
Yabusaki, SB
AF Lu, Dan
Ye, Ming
Meyer, Philip D.
Curtis, Gary P.
Shi, Xiaoqing
Niu, Xu-Feng
Yabusaki, Steve B.
TI Effects of error covariance structure on estimation of model averaging
weights and predictive performance
SO WATER RESOURCES RESEARCH
LA English
DT Article
DE model structure error; time series analysis; serial correlation;
measurement error; surface complexation model; logscore
ID UNSATURATED FRACTURED TUFF; SENSITIVITY-ANALYSIS; UNCERTAINTY;
IDENTIFICATION; FLOW; PROBABILITIES; CALIBRATION; PARAMETERS; TRANSPORT;
INFERENCE
AB [1] When conducting model averaging for assessing groundwater conceptual model uncertainty, the averaging weights are often evaluated using model selection criteria such as AIC, AICc, BIC, and KIC (Akaike Information Criterion, Corrected Akaike Information Criterion, Bayesian Information Criterion, and Kashyap Information Criterion, respectively). However, this method often leads to an unrealistic situation in which the best model receives overwhelmingly large averaging weight (close to 100%), which cannot be justified by available data and knowledge. It was found in this study that this problem was caused by using the covariance matrix, C-epsilon, of measurement errors for estimating the negative log likelihood function common to all the model selection criteria. This problem can be resolved by using the covariance matrix, Cek, of total errors (including model errors and measurement errors) to account for the correlation between the total errors. An iterative two-stage method was developed in the context of maximum likelihood inverse modeling to iteratively infer the unknown Cek from the residuals during model calibration. The inferred Cek was then used in the evaluation of model selection criteria and model averaging weights. While this method was limited to serial data using time series techniques in this study, it can be extended to spatial data using geostatistical techniques. The method was first evaluated in a synthetic study and then applied to an experimental study, in which alternative surface complexation models were developed to simulate column experiments of uranium reactive transport. It was found that the total errors of the alternative models were temporally correlated due to the model errors. The iterative two-stage method using Cek resolved the problem that the best model receives 100% model averaging weight, and the resulting model averaging weights were supported by the calibration results and physical understanding of the alternative models. Using Cek obtained from the iterative two-stage method also improved predictive performance of the individual models and model averaging in both synthetic and experimental studies.
C1 [Lu, Dan; Ye, Ming; Shi, Xiaoqing] Florida State Univ, Dept Comp Sci, Tallahassee, FL 32306 USA.
[Meyer, Philip D.; Yabusaki, Steve B.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Curtis, Gary P.] US Geol Survey, Menlo Pk, CA 94025 USA.
[Shi, Xiaoqing] Nanjing Univ, Sch Earth Sci & Engn, Nanjing 210008, Jiangsu, Peoples R China.
[Niu, Xu-Feng] Florida State Univ, Dept Stat, Tallahassee, FL 32306 USA.
RP Ye, M (reprint author), Florida State Univ, Dept Comp Sci, Tallahassee, FL 32306 USA.
EM mye@fsu.edu
RI Ye, Ming/A-5964-2008; Shi, Xiaoqing/G-4439-2010;
OI Shi, Xiaoqing/0000-0002-5074-8856; Meyer, Philip/0000-0002-8714-4693
FU NSF-EAR [0911074]; DOE-SBR [DE-SC0002687]
FX This work was supported in part by NSF-EAR grant 0911074 and DOE-SBR
grant DE-SC0002687. We thank Matthias Kohler for providing the
experimental data and concentration error estimates for the laboratory
column study. We also thank Claire Tiedeman and the anonymous reviewers
for their comments.
NR 89
TC 14
Z9 14
U1 5
U2 34
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0043-1397
EI 1944-7973
J9 WATER RESOUR RES
JI Water Resour. Res.
PD SEP
PY 2013
VL 49
IS 9
BP 6029
EP 6047
DI 10.1002/wrcr.20441
PG 19
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA 238ZO
UT WOS:000325991100064
ER
PT J
AU Kie, JG
Johnson, BK
Noyes, JH
Williams, CL
Dick, BL
Rhodes, OE
Stussy, RJ
Bowyer, RT
AF Kie, John G.
Johnson, Bruce K.
Noyes, James H.
Williams, Christen L.
Dick, Brian L.
Rhodes, Olin E.
Stussy, Rosemary J.
Bowyer, R. Terry
TI Reproduction in North American elk Cervus elaphus: paternity of calves
sired by males of mixed age classes
SO WILDLIFE BIOLOGY
LA English
DT Article
DE cattle grazing; Cervus elaphus; conception date; North American elk;
paternity; reproduction
ID MOOSE ALCES-ALCES; ADULT SEX-RATIO; ALASKAN MOOSE; MULE DEER; CONCEPTION
DATES; PREGNANCY RATES; MATING SUCCESS; BULL ELK; PARTURITION;
POPULATIONS
AB Our objective was to examine effects of groups of mixed numbers and ages of male North American elk Cervus elaphus on the reproductive performance of females. We conducted research at the Starkey Experimental Forest and Range in northeastern Oregon, USA, during 1993-2000. Each spring in late March, we released 40 female elk, eight yearling (9-month old) male elk and 2-8 branch-antlered elk (i.e. >= 2 years of age during rut the following autumn) into a 622-ha fenced pasture. Elk were gathered during autumn and early winter, and were brought to winter feeding grounds where blood samples were drawn to determine pregnancy status. The following spring, females were released into an 80-ha pasture prior to parturition. We searched for and captured newborn calves and obtained ear-punch samples for genetic analysis. We used 18 microsatellite loci to establish paternity of each calf. We varied the ratio of mature males (i.e. >= 3 years old) to female ratio from 0.03 to 0.21. As expected, mature males (older and heavier) were more successful in siring calves than were younger males. Within age classes, however, body mass in spring did not accurately predict mating success in autumn. Reproductive rates were not affected by season of grazing by cattle, yearling male to female ratio or mature male to female ratio. Sire age had no effect on mean dates of calf births or on calf weights. Neither sire age nor season of grazing by cattle had significant effects on calf weights; however, mean date of birth was significantly earlier when cattle grazing occurred during the previous autumn than when cattle grazed during the preceding spring. Furthermore, the number of calves sired by yearling males was greater when cattle grazing occurred during autumn, than when grazing occurred during spring. In the years with disruptive cattle grazing during rut, females mated not only with yearling males, in general, but often with those who were lighter in body mass during the previous spring than others in the same cohort. The extent to which those yearling males are untested in combat with older, dominant herd bulls may have genetic consequences leading to differences in fitness and subsequent reductions in calf survival.
C1 [Kie, John G.; Bowyer, R. Terry] Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209 USA.
[Kie, John G.; Dick, Brian L.] US Forest Serv, Pacific NW Res Stn, La Grande, OR 97850 USA.
[Johnson, Bruce K.] Oregon Dept Fish & Wildlife, La Grande, OR 97850 USA.
[Noyes, James H.] Oregon Dept Fish & Wildlife, Corvallis, OR 97330 USA.
[Williams, Christen L.] Purdue Univ, W Lafayette, IN 47907 USA.
[Rhodes, Olin E.] Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA.
[Stussy, Rosemary J.] Oregon Dept Fish & Wildlife, Central Point, OR 97502 USA.
RP Kie, JG (reprint author), Idaho State Univ, Dept Biol Sci, 921 South 8th Ave,Stop 8007, Pocatello, ID 83209 USA.
EM kiejohn@isu.edu; bruce.k.johnson@state.or.us;
jaines.h.noyes@state.or.us; bldick@fs.fed.us; rhodes@srel.edu;
rosemary.j.stussy@state.or.us; bowyterr@isu.edu
FU Federal Aid in Wildlife Restoration [W-87-R]; Oregon Department of Fish
and Wildlife; United States Forest Service
FX our study was supported by Federal Aid in Wildlife Restoration (W-87-R),
the Oregon Department of Fish and Wildlife and the United States Forest
Service. We appreciate the efforts of project personnel C.D. Borum, P.K.
Coe, S.L. Findholt, T. Heater, R.O. Kennedy, P.B. Kennington, L. Naylor,
J.C. Nothwang and A. Stokes. Previous drafts of this manuscript were
reviewed by J.G. Cook, R.W. DeYoung and S.L. Findholt, who provided many
valuable suggestions.
NR 50
TC 3
Z9 3
U1 1
U2 26
PU WILDLIFE BIOLOGY
PI RONDE
PA C/O JAN BERTELSEN, GRENAAVEJ 14, KALO, DK-8410 RONDE, DENMARK
SN 0909-6396
J9 WILDLIFE BIOL
JI Wildlife Biol.
PD SEP
PY 2013
VL 19
IS 3
BP 302
EP 310
DI 10.2981/12-051
PG 9
WC Ecology; Zoology
SC Environmental Sciences & Ecology; Zoology
GA 239EI
UT WOS:000326005000007
ER
PT J
AU Hastbacka, M
Rutberg, M
Bouza, A
AF Hastbacka, Mildred
Rutberg, Michael
Bouza, Antonio
TI IT and Building Loads
SO ASHRAE JOURNAL
LA English
DT Article
AB The total electricity consumption of information technology (IT) equipment in the U.S. has been estimated to be roughly 100 billion kWh annually (1 quad of primary energy).(1) In commercial buildings, computers alone are estimated to account for more than 0.6 quads of primary energy consumption.(2) As devices related to IT operations continue to proliferate, they are projected to continue accounting for a large share of direct energy consumption in commercial buildings, as well as contributing strongly to commercial building cooling load.
C1 [Hastbacka, Mildred; Rutberg, Michael] TIAX LLC, Mech Syst Grp, Lexington, MA USA.
[Bouza, Antonio] US DOE, Washington, DC 20585 USA.
RP Hastbacka, M (reprint author), TIAX LLC, Mech Syst Grp, Lexington, MA USA.
NR 13
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC HEATING REFRIGERATING AIR-CONDITIONING ENG, INC,
PI ATLANTA
PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA
SN 0001-2491
EI 1943-6637
J9 ASHRAE J
JI ASHRAE J.
PD SEP
PY 2013
VL 55
IS 9
BP 84
EP 87
PG 4
WC Thermodynamics; Construction & Building Technology; Engineering,
Mechanical
SC Thermodynamics; Construction & Building Technology; Engineering
GA 240XV
UT WOS:000326131900024
ER
PT J
AU Brady, PV
Altman, SJ
McGrath, LK
Krumhansl, JL
Anderson, HL
AF Brady, Patrick V.
Altman, Susan J.
McGrath, Lucas K.
Krumhansl, James L.
Anderson, Howard L.
TI pH modification for silica control
SO DESALINATION AND WATER TREATMENT
LA English
DT Article
DE Silica; Scale formation; Nanofiltration
ID WATER
AB Lowering solution pH slows the polymerization of silica and formation of silica scale. In batch systems, lowering the pH of approximately 200ppm silica solutions prevents scale formation for over 300h. Silica scale forms most quickly near pH 8. Solutions with pH 3.6-3.7 can maintain silica levels of 1,000-3,000ppm for roughly 90h. Bench-scale membrane testing showed that silica scale formation lag times of approximately 72h were achievable after lowering the pH to 4.5-4.7, which might allow flushing of silica-laden solutions through, for example, flow reversal, before scale formation occurs during water treatment.
C1 [Brady, Patrick V.; Altman, Susan J.; McGrath, Lucas K.; Krumhansl, James L.; Anderson, Howard L.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Brady, PV (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM pvbrady@sandia.gov
FU US Department of Energy's National Energy Technology Laboratory
(DOE/NETL); US Department of Energy's National Nuclear Security
Administration [DE-AC04-94AL85000]; NETL
FX We greatly appreciate the efforts of the Editor, Miriam Balaban, and the
reviewers. This study was funded by the US Department of Energy's
National Energy Technology Laboratory (DOE/NETL). The NETL sponsors for
this project were Isaac "Andy" Aurelio and Andrea McNemar, Project
Managers, and Jared Ciferno, Technology Manager for the Existing Plants,
Emissions and Capture Program. The authors also acknowledge the
contributions of DOE/NETL colleague Lynn Brickett. This NETL management
team provided guidance and technical oversight for this study. Sandia
National Laboratories is a multiprogram laboratory managed and operated
by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin
Corporation, for the US Department of Energy's National Nuclear Security
Administration under contract DE-AC04-94AL85000.
NR 14
TC 0
Z9 0
U1 2
U2 14
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1944-3994
EI 1944-3986
J9 DESALIN WATER TREAT
JI Desalin. Water Treat.
PD SEP 1
PY 2013
VL 51
IS 31-33
BP 5901
EP 5908
DI 10.1080/19443994.2013.766905
PG 8
WC Engineering, Chemical; Water Resources
SC Engineering; Water Resources
GA 238DQ
UT WOS:000325921700001
ER
PT J
AU Merzari, E
Pointer, WD
Fischer, P
AF Merzari, E.
Pointer, W. D.
Fischer, P.
TI Numerical Simulation and Proper Orthogonal Decomposition of the Flow in
a Counter-Flow T-Junction
SO JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
LA English
DT Article
ID DUCT
AB Large eddy simulations (LES) of the turbulent mixing in a T-junction have been carried out with the spectral element code Nek5000 at two inlet velocity ratios. Numerical results have been compared with an available experiment. Proper orthogonal decomposition (POD) has then been used to identify the most energetic modes of turbulence for both the velocity and temperature fields. Since POD was also performed on the experiment particle image velocimetry (PIV) data, a further means of verification and validation was available. The structure of the numerical POD modes and the time histories of the projection of each mode on the velocity field offer additional insight into the physics of turbulence in T-junctions. In particular, in the case of identical inlet velocities (T-junction velocity ratio equal to 1.0) the dynamics appears to be richer than might be expected and additional diagonal modes are present.
C1 [Merzari, E.; Pointer, W. D.; Fischer, P.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Merzari, E (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM emerzari@anl.gov
FU U.S. Department of Energy Office of Nuclear Energy; U.S. Department of
Energy [DE-AC02-06CH11357]
FX This work was completed under the auspices of the U.S. Department of
Energy Office of Nuclear Energy as part of the Generation IV Energy
Systems program. The submitted manuscript has been created by the
University of Chicago as Operator of Argonne National Laboratory
("Argonne") under Contract No. DE-AC02-06CH11357 with the U.S.
Department of Energy. The U.S. Government retains for itself, and others
acting on its behalf, a paid-up nonexclusive, irrevocable worldwide
license in said article to reproduce, prepare derivative works,
distribute copies to the public, and perform publicly and display
publicly, by or on behalf of the Government.
NR 18
TC 5
Z9 5
U1 3
U2 14
PU ASME
PI NEW YORK
PA TWO PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0098-2202
EI 1528-901X
J9 J FLUID ENG-T ASME
JI J. Fluids Eng.-Trans. ASME
PD SEP
PY 2013
VL 135
IS 9
AR 091304
DI 10.1115/1.4024059
PG 13
WC Engineering, Mechanical
SC Engineering
GA 240OB
UT WOS:000326105300011
ER
PT J
AU Wu, RL
Silks, LA
Olivault-Shiflett, M
Williams, RF
Ortiz, EG
Stotter, P
Kimball, DB
Martinez, RA
AF Wu, Ruilian
Silks, L. A. Pete'
Olivault-Shiflett, Morgane
Williams, Robert F.
Ortiz, Erick G.
Stotter, Philip
Kimball, David B.
Martinez, Rodolfo A.
TI A general route for C-13-labeled fluorenols and phenanthrenols via
palladium-catalyzed cross-coupling and one-carbon homologation
SO JOURNAL OF LABELLED COMPOUNDS & RADIOPHARMACEUTICALS
LA English
DT Article
DE polyaromatic hydrocarbons; palladium-catalyzed cross-coupling;
one-carbon homologation; mass spectral standards; uniformly C-13-labeled
benzene and Friedel-Crafts reactions
ID MASS-SPECTROMETRY METHOD; RESOLUTION; CYCLIZATION; ADDUCTS; REAGENT
AB A series of C-13-labeled polyaromatic hydrocarbons (PAHs), fluorenols and phenanthrenols were synthesized from commercially available C-13-labeled starting material giving rise to M+6 isotopomers. This was accomplished using key palladium-catalyzed cross-coupling and one-carbon homologation strategies. The conditions for these reactions were optimized, and the new chemical routes are efficient in the number of chemical steps, can be scaled to afford gram quantities and occur in good yields based on the C-13 label. These labeled compounds as precursors for more complex PAHs and are useful as internal standards in mass spectrometry and NMR spectroscopy studies for monitoring environmental contamination and biological exposure to PAHs and their metabolites.
C1 [Wu, Ruilian; Silks, L. A. Pete'; Olivault-Shiflett, Morgane; Williams, Robert F.; Ortiz, Erick G.; Stotter, Philip; Kimball, David B.] Los Alamos Natl Lab, Bioenergy & Biome Sci Grp, Biophys Chem Team, Los Alamos, NM 87545 USA.
[Martinez, Rodolfo A.] New Mexico Highland Univ, Dept Chem, Las Vegas, NM 87701 USA.
RP Silks, LA (reprint author), Los Alamos Natl Lab, Bioenergy & Biome Sci Grp, POB 1663, Los Alamos, NM 87545 USA.
EM pete-silks@lanl.gov; rudy@nmhu.edu
FU CDC [R-2589-03-0]; Los Alamos National Laboratory LDRD program [Silks:
20060317 ER: X9DN]
FX We gratefully acknowledge the support of this work by the CDC
(R-2589-03-0) and the Los Alamos National Laboratory LDRD program
(Silks: 20060317 ER: X9DN, Understanding the Process of Intercalation
Using Stable Isotope Labeled Polyaromatic Hydrocarbons (PAHs) and
Oligomeric DNA; the Quantitation of Weak Bonding in DNA).
NR 17
TC 1
Z9 1
U1 1
U2 2
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0362-4803
EI 1099-1344
J9 J LABELLED COMPD RAD
JI J. Label. Compd. Radiopharm.
PD SEP
PY 2013
VL 56
IS 11
BP 581
EP 586
DI 10.1002/jlcr.3066
PG 6
WC Biochemical Research Methods; Chemistry, Medicinal; Chemistry,
Analytical
SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Chemistry
GA 238ZC
UT WOS:000325989900006
PM 24285190
ER
PT J
AU Hall, PB
Brandt, WN
Petitjean, P
Paris, I
Ak, NF
Shen, Y
Gibson, RR
Aubourg, E
Anderson, SF
Schneider, DP
Bizyaev, D
Brinkmann, J
Malanushenko, E
Malanushenko, V
Myers, AD
Oravetz, DJ
Ross, NP
Shelden, A
Simmons, AE
Streblyanska, A
Weaver, BA
York, DG
AF Hall, P. B.
Brandt, W. N.
Petitjean, P.
Paris, I.
Ak, N. Filiz
Shen, Yue
Gibson, R. R.
Aubourg, E.
Anderson, S. F.
Schneider, D. P.
Bizyaev, D.
Brinkmann, J.
Malanushenko, E.
Malanushenko, V.
Myers, A. D.
Oravetz, D. J.
Ross, N. P.
Shelden, A.
Simmons, A. E.
Streblyanska, A.
Weaver, B. A.
York, D. G.
TI Broad absorption line quasars with redshifted troughs: high-velocity
infall or rotationally dominated outflows?
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE galaxies: nuclei; quasars: absorption lines; quasars: general
ID DIGITAL-SKY-SURVEY; OSCILLATION SPECTROSCOPIC SURVEY; ACTIVE GALACTIC
NUCLEUS; ROTATING ACCRETION FLOWS; MASSIVE BLACK-HOLES; DRIVEN DISK
WINDS; 7TH DATA RELEASE; 9TH DATA RELEASE; SURVEY 1ST DATA; SDSS-III
AB We report the discovery in the Sloan Digital Sky Survey (SDSS) and the SDSS-III Baryon Oscillation Spectroscopic Survey of 17 broad absorption line (BAL) quasars with high-ionization troughs that include absorption redshifted relative to the quasar rest frame. The redshifted troughs extend to velocities up to v similar or equal to 12 000 km s(-1) and the trough widths exceed 3000 km s(-1) in all but one case. Approximately 1 in 1000 BAL quasars with blueshifted CIV absorption also has redshifted C IV absorption; objects with CIV absorption present only at redshifted velocities are roughly four times rarer. In more than half of our objects, redshifted absorption is seen in CII or Al III as well as CIV, making low-ionization absorption at least 10 times more common among BAL quasars with redshifted troughs than among standard BAL quasars. However, the CIV absorption equivalent widths in our objects are on average smaller than those of standard BAL quasars with low-ionization absorption.
We consider several possible ways of generating redshifted absorption. The two most likely possibilities may be at work simultaneously, in the same objects or in different ones. Rotationally dominated outflows seen against a quasar's extended continuum source can produce redshifted and blueshifted absorption, but variability consistent with this scenario is seen in only one of the four objects with multiple spectra. The infall of relatively dense and low-ionization gas to radii as small as 400 Schwarzschild radii can in principle explain the observed range of trough profiles, but current models do not easily explain the origin and survival of such gas. Whatever the origin(s) of the absorbing gas in these objects, it must be located at small radii to explain its large redshifted velocities, and thus offers a novel probe of the inner regions of quasars.
C1 [Hall, P. B.] York Univ, Dept Phys & Astron, Toronto, ON M3J 1P3, Canada.
[Brandt, W. N.; Ak, N. Filiz; Schneider, D. P.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Brandt, W. N.; Ak, N. Filiz; Schneider, D. P.] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA.
[Petitjean, P.; Paris, I.] Univ Paris 06, Inst Astrophys Paris, F-75014 Paris, France.
[Ak, N. Filiz] Erciyes Univ, Dept Astron & Space Sci, Fac Sci, TR-38039 Kayseri, Turkey.
[Shen, Yue] Carnegie Observ, Pasadena, CA 91101 USA.
[Gibson, R. R.; Anderson, S. F.] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[Aubourg, E.] Univ Paris 07, APC, F-75205 Paris, France.
[Bizyaev, D.; Brinkmann, J.; Malanushenko, E.; Malanushenko, V.; Oravetz, D. J.; Shelden, A.; Simmons, A. E.] Apache Point Observ, Sunspot, NM 88349 USA.
[Myers, A. D.] Univ Wyoming, Dept Phys & Astron, Laramie, WY 82071 USA.
[Ross, N. P.] Lawrence Berkeley Natl Lab, Berkeley, CA 92420 USA.
[Streblyanska, A.] Inst Astrofis Canarias, E-38200 Tenerife, Spain.
[Weaver, B. A.] NYU, Ctr Cosmol & Particle Phys, New York, NY 10003 USA.
[York, D. G.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[York, D. G.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
RP Hall, PB (reprint author), York Univ, Dept Phys & Astron, Toronto, ON M3J 1P3, Canada.
EM phall@yorku.ca
RI Filiz Ak, Nurten/C-9686-2015; Brandt, William/N-2844-2015
OI Filiz Ak, Nurten/0000-0003-3016-5490; Brandt,
William/0000-0002-0167-2453
FU NSERC; Aspen Center for Physics (NSF) [1066293]; NSF [AST-1108604];
Alfred P. Sloan Foundation; National Science Foundation; US Department
of Energy Office of Science; University of Arizona; Brookhaven National
Laboratory; University of Cambridge; Carnegie Mellon University;
University of Florida; Harvard University; Instituto de Astrofisica de
Canarias; Michigan State/Notre Dame/JINA Participation Group; Johns
Hopkins University; Lawrence Berkeley National Laboratory; Max Planck
Institute for Astrophysics; Max Planck Institute for Extraterrestrial
Physics; New Mexico State University; New York University; Ohio State
University; Pennsylvania State University; University of Portsmouth;
Princeton University; University of Tokyo; University of Utah;
Vanderbilt University; University of Virginia; University of Washington;
Yale University
FX We thank D. Proga, M. Bautista, D. Edmonds and N. Murray for
discussions, and the referee for a careful review. PBH thanks NSERC for
its research support, the Institute of Astronomy at the University of
Cambridge for hosting his sabbatical and the Aspen Center for Physics
(NSF Grant no. 1066293) for its hospitality. WNB and NFA are supported
by NSF grant AST-1108604. This research has made extensive use of NASA's
Astrophysics Data System Bibliographic Services and of the Atomic Line
List at http://www.pa.uky.edu/similar to peter/atomic/.; Funding for
SDSS-III has been provided by the Alfred P. Sloan Foundation, the
Participating Institutions, the National Science Foundation and the US
Department of Energy Office of Science. The SDSS-III website is
http://www.sdss3.org/. SDSS-III is managed by the Astrophysical Research
Consortium for the Participating Institutions of the SDSS-III
Collaboration including the University of Arizona, the Brazilian
Participation Group, Brookhaven National Laboratory, University of
Cambridge, Carnegie Mellon University, University of Florida, the French
Participation Group, the German Participation Group, Harvard University,
the Instituto de Astrofisica de Canarias, the Michigan State/Notre
Dame/JINA Participation Group, Johns Hopkins University, Lawrence
Berkeley National Laboratory, Max Planck Institute for Astrophysics, Max
Planck Institute for Extraterrestrial Physics, New Mexico State
University, New York University, Ohio State University, Pennsylvania
State University, University of Portsmouth, Princeton University, the
Spanish Participation Group, University of Tokyo, University of Utah,
Vanderbilt University, University of Virginia, University of Washington
and Yale University.
NR 142
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PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 1
BP 222
EP 256
DI 10.1093/mnras/stt1012
PG 35
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207XA
UT WOS:000323636800017
ER
PT J
AU Davies, LJM
Maraston, C
Thomas, D
Capozzi, D
Wechsler, RH
Busha, MT
Banerji, M
Ostrovski, F
Papovich, C
Santiago, BX
Nichol, R
Maia, MAG
da Costa, LN
AF Davies, L. J. M.
Maraston, C.
Thomas, D.
Capozzi, D.
Wechsler, R. H.
Busha, M. T.
Banerji, M.
Ostrovski, F.
Papovich, C.
Santiago, B. X.
Nichol, R.
Maia, M. A. G.
da Costa, L. N.
TI Detecting massive galaxies at high redshift using the Dark Energy Survey
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE galaxies: evolution; galaxies: high-redshift
ID LYMAN-BREAK GALAXIES; STAR-FORMING GALAXIES; DIGITAL SKY SURVEY;
ULTRAVIOLET LUMINOSITY DENSITY; ORIGINS DEEP SURVEY; YALE-CHILE MUSYC;
TO 5 LBGS; STELLAR MASS; SUBMILLIMETER GALAXIES; PHOTOMETRIC REDSHIFTS
AB The Dark Energy Survey (DES) will be unprecedented in its ability to probe exceptionally large cosmic volumes to relatively faint optical limits. Primarily designed for the study of comparatively low-redshift (z < 2) galaxies with the aim of constraining dark energy, an intriguing byproduct of the survey will be the identification of massive (> 10(12.0) M-circle dot) galaxies at z greater than or similar to 4. This will greatly improve our understanding of how galaxies form and evolve. By both passively evolving the low-redshift mass function and extrapolating the observed high-redshift mass function, we find that such galaxies should be rare but nonetheless present at early times, with predicted number densities of similar to 0.02 deg(-2). The unique combination of depth and coverage that DES provides will allow the identification of such galaxies should they exist - potentially identifying hundreds of such sources. We then model possible high-redshift galaxies and determine their detectability using the DES filter sets and depths. We model sources with a broad range stellar properties and find that for these galaxies to be detected they must be either sufficiently young, high mass and/or relatively dust free (E(B - V) < 0.45) - with these parameters jointly affecting each galaxy's detectability. We also propose colour-colour selection criteria for the identification of both pristine and dusty sources and find that, although contamination fractions will be high, the most reliable candidate massive high-redshift galaxies are likely to be identifiable in the DES data through prioritisation of colour-selected sources.
C1 [Davies, L. J. M.; Maraston, C.; Thomas, D.; Capozzi, D.; Nichol, R.] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England.
[Davies, L. J. M.] Univ Bristol, Dept Phys, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
[Wechsler, R. H.] Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA.
[Wechsler, R. H.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Wechsler, R. H.] SLAC Natl Accelerator Lab, Dept Particle Phys & Astrophys, Stanford, CA 94305 USA.
[Busha, M. T.] Univ Zurich, Inst Theoret Phys, CH-8001 Zurich, Switzerland.
[Busha, M. T.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA.
[Banerji, M.] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.
[Banerji, M.] UCL, Dept Phys & Astron, London WC1E 6BT, England.
[Ostrovski, F.; Maia, M. A. G.; da Costa, L. N.] Observ Nacl, BR-20921400 Rio De Janeiro, RJ, Brazil.
[Ostrovski, F.; Santiago, B. X.; Maia, M. A. G.; da Costa, L. N.] Lab Nacl E Astron, BR-20921400 Rio De Janeiro, RJ, Brazil.
[Papovich, C.] Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA.
[Papovich, C.] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA.
[Santiago, B. X.] Univ Fed Rio Grande do Sul, Inst Fis, BR-15051 Porto Alegre, RS, Brazil.
RP Davies, LJM (reprint author), Univ Portsmouth, Inst Cosmol & Gravitat, Dennis Sciama Bldg,Burnaby Rd, Portsmouth PO1 3FX, Hants, England.
EM luke.davies@bristol.ac.uk
OI Banerji, Manda/0000-0002-0639-5141
NR 101
TC 3
Z9 3
U1 0
U2 2
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 1
BP 296
EP 312
DI 10.1093/mnras/stt1018
PG 17
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207XA
UT WOS:000323636800020
ER
PT J
AU Ade, PAR
Aghanim, N
Alves, MIR
Arnaud, M
Ashdown, M
Atrio-Barandela, F
Aumont, J
Baccigalupi, C
Balbi, A
Banday, AJ
Barreiro, RB
Bartlett, JG
Battaner, E
Bedini, L
Benabed, K
Benoit, A
Bernard, JP
Bersanelli, M
Bonaldi, A
Bond, JR
Borrill, J
Bouchet, FR
Boulanger, F
Burigana, C
Butler, RC
Cabella, P
Cardoso, JF
Chen, X
Chiang, LY
Christensen, PR
Clements, DL
Colombi, S
Colombo, LPL
Coulais, A
Cuttaia, F
Davies, RD
Davis, RJ
de Bernardis, P
de Gasperis, G
de Zotti, G
Delabrouille, J
Dickinson, C
Diego, JM
Dobler, G
Dole, H
Donzelli, S
Dore, O
Douspis, M
Dupac, X
Ensslin, TA
Finelli, F
Forni, O
Frailis, M
Franceschi, E
Galeotta, S
Ganga, K
Genova-Santos, RT
Ghosh, T
Giard, M
Giardino, G
Giraud-Heraud, Y
Gonzalez-Nuevo, J
Gorski, KM
Gregorio, A
Gruppuso, A
Hansen, FK
Harrison, D
Hernandez-Monteagudo, C
Hildebrandt, SR
Hivon, E
Hobson, M
Holmes, WA
Hornstrup, A
Hovest, W
Huffenberger, KM
Jaffe, TR
Jaffe, AH
Juvela, M
Keihanen, E
Keskitalo, R
Kisner, TS
Knoche, J
Kunz, M
Kurki-Suonio, H
Lagache, G
Lahteenmaki, A
Lamarre, JM
Lasenby, A
Lawrence, CR
Leach, S
Leonardi, R
Lilje, PB
Linden-Vornle, M
Lubin, PM
Macias-Perez, JF
Maffei, B
Maino, D
Mandolesi, N
Maris, M
Marshall, DJ
Martin, PG
Martinez-Gonzalez, E
Masi, S
Massardi, M
Matarrese, S
Mazzotta, P
Melchiorri, A
Mennella, A
Mitra, S
Miville-Deschenes, MA
Moneti, A
Montier, L
Morgante, G
Mortlock, D
Munshi, D
Murphy, JA
Naselsky, P
Nati, F
Natoli, P
Norgaard-Nielsen, HU
Noviello, F
Novikov, D
Novikov, I
Osborne, S
Oxborrow, CA
Pajot, F
Paladini, R
Paoletti, D
Peel, M
Perotto, L
Perrotta, F
Piacentini, F
Piat, M
Pierpaoli, E
Pietrobon, D
Plaszczynski, S
Pointecouteau, E
Polenta, G
Popa, L
Poutanen, T
Pratt, GW
Prunet, S
Puget, JL
Rachen, JP
Reach, WT
Rebolo, R
Reinecke, M
Renault, C
Ricciardi, S
Ristorcelli, I
Rocha, G
Rosset, C
Rubino-Martin, JA
Rusholme, B
Salerno, E
Sandri, M
Savini, G
Scott, D
Spencer, L
Stolyarov, V
Sudiwala, R
Suur-Uski, AS
Sygnet, JF
Tauber, JA
Terenzi, L
Tibbs, CT
Toffolatti, L
Tomasi, M
Tristram, M
Valenziano, L
Van Tent, B
Varis, J
Vielva, P
Villa, F
Vittorio, N
Wade, LA
Wandelt, BD
Ysard, N
Yvon, D
Zacchei, A
Zonca, A
AF Ade, P. A. R.
Aghanim, N.
Alves, M. I. R.
Arnaud, M.
Ashdown, M.
Atrio-Barandela, F.
Aumont, J.
Baccigalupi, C.
Balbi, A.
Banday, A. J.
Barreiro, R. B.
Bartlett, J. G.
Battaner, E.
Bedini, L.
Benabed, K.
Benoit, A.
Bernard, J. -P.
Bersanelli, M.
Bonaldi, A.
Bond, J. R.
Borrill, J.
Bouchet, F. R.
Boulanger, F.
Burigana, C.
Butler, R. C.
Cabella, P.
Cardoso, J. -F.
Chen, X.
Chiang, L. -Y
Christensen, P. R.
Clements, D. L.
Colombi, S.
Colombo, L. P. L.
Coulais, A.
Cuttaia, F.
Davies, R. D.
Davis, R. J.
de Bernardis, P.
de Gasperis, G.
de Zotti, G.
Delabrouille, J.
Dickinson, C.
Diego, J. M.
Dobler, G.
Dole, H.
Donzelli, S.
Dore, O.
Douspis, M.
Dupac, X.
Ensslin, T. A.
Finelli, F.
Forni, O.
Frailis, M.
Franceschi, E.
Galeotta, S.
Ganga, K.
Genova-Santos, R. T.
Ghosh, T.
Giard, M.
Giardino, G.
Giraud-Heraud, Y.
Gonzalez-Nuevo, J.
Gorski, K. M.
Gregorio, A.
Gruppuso, A.
Hansen, F. K.
Harrison, D.
Hernandez-Monteagudo, C.
Hildebrandt, S. R.
Hivon, E.
Hobson, M.
Holmes, W. A.
Hornstrup, A.
Hovest, W.
Huffenberger, K. M.
Jaffe, T. R.
Jaffe, A. H.
Juvela, M.
Keihanen, E.
Keskitalo, R.
Kisner, T. S.
Knoche, J.
Kunz, M.
Kurki-Suonio, H.
Lagache, G.
Lahteenmaki, A.
Lamarre, J. -M.
Lasenby, A.
Lawrence, C. R.
Leach, S.
Leonardi, R.
Lilje, P. B.
Linden-Vornle, M.
Lubin, P. M.
Macias-Perez, J. F.
Maffei, B.
Maino, D.
Mandolesi, N.
Maris, M.
Marshall, D. J.
Martin, P. G.
Martinez-Gonzalez, E.
Masi, S.
Massardi, M.
Matarrese, S.
Mazzotta, P.
Melchiorri, A.
Mennella, A.
Mitra, S.
Miville-Deschenes, M. -A.
Moneti, A.
Montier, L.
Morgante, G.
Mortlock, D.
Munshi, D.
Murphy, J. A.
Naselsky, P.
Nati, F.
Natoli, P.
Norgaard-Nielsen, H. U.
Noviello, F.
Novikov, D.
Novikov, I.
Osborne, S.
Oxborrow, C. A.
Pajot, F.
Paladini, R.
Paoletti, D.
Peel, M.
Perotto, L.
Perrotta, F.
Piacentini, F.
Piat, M.
Pierpaoli, E.
Pietrobon, D.
Plaszczynski, S.
Pointecouteau, E.
Polenta, G.
Popa, L.
Poutanen, T.
Pratt, G. W.
Prunet, S.
Puget, J. -L.
Rachen, J. P.
Reach, W. T.
Rebolo, R.
Reinecke, M.
Renault, C.
Ricciardi, S.
Ristorcelli, I.
Rocha, G.
Rosset, C.
Rubino-Martin, J. A.
Rusholme, B.
Salerno, E.
Sandri, M.
Savini, G.
Scott, D.
Spencer, L.
Stolyarov, V.
Sudiwala, R.
Suur-Uski, A. -S.
Sygnet, J. -F.
Tauber, J. A.
Terenzi, L.
Tibbs, C. T.
Toffolatti, L.
Tomasi, M.
Tristram, M.
Valenziano, L.
Van Tent, B.
Varis, J.
Vielva, P.
Villa, F.
Vittorio, N.
Wade, L. A.
Wandelt, B. D.
Ysard, N.
Yvon, D.
Zacchei, A.
Zonca, A.
TI Planck intermediate results. XII: Diffuse Galactic components in the
Gould Belt system
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE Galaxy: general; radio continuum: ISM; radiation mechanisms: general
ID MICROWAVE-ANISOTROPY-PROBE; SPINNING DUST EMISSION; CENTIMETER-WAVE
CONTINUUM; H-ALPHA; INFRARED-EMISSION; WMAP OBSERVATIONS; ANOMALOUS
DUST; FOREGROUND EMISSION; TENTATIVE DETECTION; POLARIZATION DATA
AB We perform an analysis of the diffuse low-frequency Galactic components in the southern part of the Gould Belt system (130 degrees <= l <= 230 degrees and -50 degrees <= b <= -10 degrees). Strong ultra-violet flux coming from the Gould Belt super-association is responsible for bright diffuse foregrounds that we observe from our position inside the system and that can help us improve our knowledge of the Galactic emission. Free-free emission and anomalous microwave emission (AME) are the dominant components at low frequencies (nu < 40 GHz), while synchrotron emission is very smooth and faint. We separated diffuse free-free emission and AME from synchrotron emission and thermal dust emission by using Planck data, complemented by ancillary data, using the correlated component analysis (CCA) component-separation method and we compared our results with the results of cross-correlation of foreground templates with the frequency maps. We estimated the electron temperature T-e from Ha and free-free emission using two methods (temperature-temperature plot and cross-correlation) and obtained T-e ranging from 3100 to 5200 K for an effective fraction of absorbing dust along the line of sight of 30% (f(d) = 0.3). We estimated the frequency spectrum of the diffuse AME and recovered a peak frequency (in flux density units) of 25.5 +/- 1.5 GHz. We verified the reliability of this result with realistic simulations that include biases in the spectral model for the AME and in the free-free template. By combining physical models for vibrational and rotational dust emission and adding the constraints from the thermal dust spectrum from Planck and IRAS, we are able to present a good description of the AME frequency spectrum for plausible values of the local density and radiation field.
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[Lahteenmaki, A.; Poutanen, T.] Aalto Univ, Metsahovi Radio Observ, Kylmala 02540, Finland.
[Kunz, M.] African Inst Math Sci, Cape Town, South Africa.
[Natoli, P.; Polenta, G.] Agenzia Spaziale Italiana Sci Data Ctr, Frascati, Italy.
[Mandolesi, N.] Agenzia Spaziale Italiana, Rome, Italy.
[Ashdown, M.; Hobson, M.; Lasenby, A.; Stolyarov, V.] Univ Cambridge, Cavendish Lab, Astrophys Grp, Cambridge CB3 OHE, England.
[Bond, J. R.; Martin, P. G.; Miville-Deschenes, M. -A.] Univ Toronto, CITA, Toronto, ON M5S 3H8, Canada.
[Bedini, L.; Salerno, E.] CNR, ISTI, Area Ric, Pisa, Italy.
[Banday, A. J.; Bernard, J. -P.; Forni, O.; Giard, M.; Jaffe, T. R.; Montier, L.; Pointecouteau, E.; Ristorcelli, I.] CNRS, IRAP, F-31028 Toulouse 4, France.
[Dore, O.; Hildebrandt, S. R.; Rocha, G.] CALTECH, Pasadena, CA 91125 USA.
[Hernandez-Monteagudo, C.] CEFCA, Teruel 44001, Spain.
[Borrill, J.; Keskitalo, R.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Comp Cosmol Ctr, Berkeley, CA 94720 USA.
[Rebolo, R.] CSIC, Madrid, Spain.
[Yvon, D.] CEA Saclay, DSM, Irfu, SPP, F-91191 Gif Sur Yvette, France.
[Hornstrup, A.; Linden-Vornle, M.; Norgaard-Nielsen, H. U.; Oxborrow, C. A.] Tech Univ Denmark, DTU Space, Natl Space Inst, DK-2800 Lyngby, Kgs, Denmark.
[Kunz, M.] Univ Geneva, Dept Phys Theor, CH-1211 Geneva 4, Switzerland.
[Atrio-Barandela, F.] Univ Salamanca, Fac Ciencias, Dept Fis Fundamental, E-37008 Salamanca, Spain.
[Toffolatti, L.] Univ Oviedo, Dept Fis, E-33007 Oviedo, Spain.
[Rachen, J. P.] Radboud Univ Nijmegen, IMAPP, Dept Astrophys, NL-6500 GL Nijmegen, Netherlands.
[Keskitalo, R.] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA.
[Scott, D.] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V5Z 1M9, Canada.
[Colombo, L. P. L.; Pierpaoli, E.] Univ So Calif, Dana & David Dornsife Coll Letter Arts & Sci, Dept Phys & Astron, Los Angeles, CA 90089 USA.
[Juvela, M.; Keihanen, E.; Kurki-Suonio, H.; Poutanen, T.; Suur-Uski, A. -S.; Ysard, N.] Univ Helsinki, Dept Phys, Helsinki, Finland.
[Lubin, P. M.; Zonca, A.] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
[Wandelt, B. D.] Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
[Matarrese, S.] Univ Padua, Dipartimento Fis Astron G Galilei, I-35131 Padua, Italy.
[Burigana, C.; Mandolesi, N.; Natoli, P.] Univ Ferrara, Dipartimento Fis Sci Terra, I-44122 Ferrara, Italy.
[de Bernardis, P.; Masi, S.; Melchiorri, A.; Nati, F.; Piacentini, F.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
[Bersanelli, M.; Maino, D.; Mennella, A.] Univ Milan, Dipartimento Fis, Milan, Italy.
[Gregorio, A.] Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
[Balbi, A.; de Gasperis, G.; Mazzotta, P.; Vittorio, N.] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy.
[Cabella, P.] Univ Roma Tor Vergata, Dipartimento Matemat, I-00133 Rome, Italy.
[Christensen, P. R.; Naselsky, P.] Niels Bohr Inst, Discovery Ctr, DK-2100 Copenhagen, Denmark.
[Rebolo, R.; Rubino-Martin, J. A.] Univ La Laguna, Dpto Astrofis, Tenerife 38206, Spain.
[Dupac, X.; Leonardi, R.] European Space Agcy, ESAC, Planck Sci Off, Madrid, Spain.
[Giardino, G.; Tauber, J. A.] European Space Agcy, ESTEC, NL-2201 AZ Noordwijk, Netherlands.
[Kurki-Suonio, H.; Lahteenmaki, A.; Poutanen, T.; Suur-Uski, A. -S.] Univ Helsinki, Helsinki Inst Phys, Helsinki, Finland.
[de Zotti, G.] Osserv Astron Padova, INAF, Padua, Italy.
[Polenta, G.] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, Italy.
[Frailis, M.; Galeotta, S.; Gregorio, A.; Maris, M.; Zacchei, A.] Osserv Astron Trieste, INAF, I-34131 Trieste, Italy.
[Massardi, M.] Ist Radioastron, INAF, I-40129 Bologna, Italy.
[Burigana, C.; Butler, R. C.; Cuttaia, F.; Finelli, F.; Franceschi, E.; Gruppuso, A.; Mandolesi, N.; Morgante, G.; Natoli, P.; Paoletti, D.; Ricciardi, S.; Sandri, M.; Terenzi, L.; Valenziano, L.; Villa, F.] IASF Bologna, INAF, Bologna, Italy.
[Bersanelli, M.; Donzelli, S.; Maino, D.; Mennella, A.; Tomasi, M.] IASF Milano, INAF, Milan, Italy.
[Finelli, F.; Paoletti, D.] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy.
[Melchiorri, A.] Univ Roma La Sapienza, Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy.
[Mitra, S.] IUCAA, Pune 411007, Maharashtra, India.
[Clements, D. L.; Jaffe, A. H.; Mortlock, D.; Novikov, D.] Imperial Coll London, Astrophys Grp, Blackett Lab, London SW7 2AZ, England.
[Chen, X.; Paladini, R.; Rusholme, B.; Tibbs, C. T.] CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA.
[Benoit, A.] Univ Grenoble 1, CNRS, Inst Neel, Grenoble, France.
[Dole, H.] Inst Univ France, F-75005 Paris, France.
[Aghanim, N.; Alves, M. I. R.; Aumont, J.; Boulanger, F.; Dole, H.; Douspis, M.; Ghosh, T.; Kunz, M.; Lagache, G.; Miville-Deschenes, M. -A.; Pajot, F.; Puget, J. -L.] Univ Paris 11, CNRS, Inst Astrophys Spatiale, UMR 8617, F-91405 Orsay, France.
[Benabed, K.; Bouchet, F. R.; Cardoso, J. -F.; Colombi, S.; Hivon, E.; Moneti, A.; Prunet, S.; Sygnet, J. -F.; Wandelt, B. D.] CNRS, Inst Astrophys Paris, UMR 7095, F-75014 Paris, France.
[Popa, L.] Inst Space Sci, Bucharest, Romania.
[Chiang, L. -Y] Acad Sinica, Inst Astron & Astrophys, Taipei 115, Taiwan.
[Harrison, D.] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.
[Hansen, F. K.; Lilje, P. B.] Univ Oslo, Inst Theoret Astrophys, Oslo, Norway.
[Genova-Santos, R. T.; Rebolo, R.; Rubino-Martin, J. A.] Inst Astrofis Canarias, Tenerife, Spain.
[Barreiro, R. B.; Diego, J. M.; Gonzalez-Nuevo, J.; Martinez-Gonzalez, E.; Toffolatti, L.; Vielva, P.] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain.
[Bartlett, J. G.; Colombo, L. P. L.; Dore, O.; Gorski, K. M.; Holmes, W. A.; Lawrence, C. R.; Mitra, S.; Pietrobon, D.; Rocha, G.; Wade, L. A.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
[Bonaldi, A.; Davies, R. D.; Davis, R. J.; Dickinson, C.; Maffei, B.; Noviello, F.; Peel, M.] Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England.
[Ashdown, M.; Harrison, D.; Lasenby, A.; Stolyarov, V.] Kavli Inst Cosmol Cambridge, Cambridge CB3 0HA, England.
[Dobler, G.] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA.
[Plaszczynski, S.; Tristram, M.] Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France.
[Coulais, A.; Lamarre, J. -M.] CNRS, LERMA, Observ Paris, Paris, France.
[Arnaud, M.; Marshall, D. J.; Pratt, G. W.] Univ Paris Diderot, CNRS, CEA Saclay, CEA DSM,Lab AIM,IRFU Serv Astrophys, F-91191 Gif Sur Yvette, France.
[Cardoso, J. -F.] CNRS, Lab Traitement & Commun Informat, UMR 5141, F-75634 Paris 13, France.
[Cardoso, J. -F.] Telecom ParisTech, F-75634 Paris 13, France.
[Macias-Perez, J. F.; Perotto, L.; Renault, C.] Univ Grenoble 1, CNRS, IN2P3, Inst Natl Polytech Grenoble,Lab Phys Subat & Cosm, F-38026 Grenoble, France.
[Van Tent, B.] Univ Paris 11, Phys Theor Lab, F-91405 Orsay, France.
[Van Tent, B.] CNRS, F-91405 Orsay, France.
[Kisner, T. S.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Ensslin, T. A.; Hernandez-Monteagudo, C.; Hovest, W.; Knoche, J.; Rachen, J. P.; Reinecke, M.] Max Planck Inst Astrophys, D-85741 Garching, Germany.
[Varis, J.] VTT Tech Res Ctr Finland, MilliLab, Espoo, Finland.
[Murphy, J. A.] Natl Univ Ireland, Dept Expt Phys, Maynooth, Kildare, Ireland.
[Christensen, P. R.; Naselsky, P.; Novikov, I.] Niels Bohr Inst, DK-2100 Copenhagen, Denmark.
[Savini, G.] UCL, Opt Sci Lab, London, England.
[Baccigalupi, C.; de Zotti, G.; Gonzalez-Nuevo, J.; Leach, S.; Perrotta, F.] SISSA, Astrophys Sect, I-34136 Trieste, Italy.
[Ade, P. A. R.; Munshi, D.; Spencer, L.; Sudiwala, R.] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales.
[Borrill, J.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Stolyarov, V.] Russian Acad Sci, Special Astrophys Observ, Zelenchukskiy Region 369167, Karachai Cherke, Russia.
[Osborne, S.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Benabed, K.; Bouchet, F. R.; Colombi, S.; Hivon, E.; Prunet, S.; Wandelt, B. D.] Univ Paris 06, UPMC, UMR 7095, F-75014 Paris, France.
[Banday, A. J.; Forni, O.; Giard, M.; Jaffe, T. R.; Montier, L.; Pointecouteau, E.; Ristorcelli, I.] Univ Toulouse, UPS OMP, IRAP, F-31028 Toulouse 4, France.
[Reach, W. T.] Univ Space Res Assoc, Stratospher Observ Infrared Astron, Moffett Field, CA 94035 USA.
[Battaner, E.] Univ Granada, Fac Ciencias, Dept Fis Teor & Cosmos, Granada, Spain.
[Huffenberger, K. M.] Univ Miami, Coral Gables, FL 33124 USA.
[Gorski, K. M.] Univ Warsaw Observ, PL-00478 Warsaw, Poland.
RP Bonaldi, A (reprint author), Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Alan Turing Bldg,Oxford Rd, Manchester M13 9PL, Lancs, England.
EM anna.bonaldi@manchester.ac.uk
RI Butler, Reginald/N-4647-2015; Ghosh, Tuhin/E-6899-2016; Tomasi,
Maurizio/I-1234-2016; Novikov, Igor/N-5098-2015; Colombo,
Loris/J-2415-2016; Nati, Federico/I-4469-2016; popa, lucia/B-4718-2012;
Piacentini, Francesco/E-7234-2010; Atrio-Barandela,
Fernando/A-7379-2017; Stolyarov, Vladislav/C-5656-2017; Mazzotta,
Pasquale/B-1225-2016; Salerno, Emanuele/A-2137-2010; Bouchet,
Francois/B-5202-2014; Lahteenmaki, Anne/L-5987-2013; Vielva,
Patricio/F-6745-2014; Toffolatti, Luigi/K-5070-2014; Battaner,
Eduardo/P-7019-2014; Barreiro, Rita Belen/N-5442-2014; Yvon,
Dominique/D-2280-2015; Martinez-Gonzalez, Enrique/E-9534-2015;
Gonzalez-Nuevo, Joaquin/I-3562-2014; Gruppuso, Alessandro/N-5592-2015;
Novikov, Dmitry/P-1807-2015; Kurki-Suonio, Hannu/B-8502-2016;
OI Paoletti, Daniela/0000-0003-4761-6147; Savini,
Giorgio/0000-0003-4449-9416; Pierpaoli, Elena/0000-0002-7957-8993;
Juvela, Mika/0000-0002-5809-4834; Galeotta, Samuele/0000-0002-3748-5115;
Finelli, Fabio/0000-0002-6694-3269; Scott, Douglas/0000-0002-6878-9840;
Frailis, Marco/0000-0002-7400-2135; Gregorio, Anna/0000-0003-4028-8785;
Polenta, Gianluca/0000-0003-4067-9196; Butler,
Reginald/0000-0003-4366-5996; Sandri, Maura/0000-0003-4806-5375;
Cuttaia, Francesco/0000-0001-6608-5017; Huffenberger,
Kevin/0000-0001-7109-0099; Masi, Silvia/0000-0001-5105-1439; de
Bernardis, Paolo/0000-0001-6547-6446; Forni,
Olivier/0000-0001-6772-9689; Morgante, Gianluca/0000-0001-9234-7412;
Maris, Michele/0000-0001-9442-2754; Franceschi,
Enrico/0000-0002-0585-6591; Valenziano, Luca/0000-0002-1170-0104;
Matarrese, Sabino/0000-0002-2573-1243; TERENZI,
LUCA/0000-0001-9915-6379; Reach, William/0000-0001-8362-4094; Zacchei,
Andrea/0000-0003-0396-1192; Hivon, Eric/0000-0003-1880-2733; Lilje,
Per/0000-0003-4324-7794; Tomasi, Maurizio/0000-0002-1448-6131; Colombo,
Loris/0000-0003-4572-7732; Nati, Federico/0000-0002-8307-5088;
Piacentini, Francesco/0000-0002-5444-9327; Atrio-Barandela,
Fernando/0000-0002-2130-2513; Stolyarov, Vladislav/0000-0001-8151-828X;
Mazzotta, Pasquale/0000-0002-5411-1748; WANDELT,
Benjamin/0000-0002-5854-8269; Rubino-Martin, Jose
Alberto/0000-0001-5289-3021; De Zotti, Gianfranco/0000-0003-2868-2595;
Salerno, Emanuele/0000-0002-3433-3634; Vielva,
Patricio/0000-0003-0051-272X; Toffolatti, Luigi/0000-0003-2645-7386;
Barreiro, Rita Belen/0000-0002-6139-4272; Martinez-Gonzalez,
Enrique/0000-0002-0179-8590; Gonzalez-Nuevo,
Joaquin/0000-0003-1354-6822; Gruppuso, Alessandro/0000-0001-9272-5292;
Kurki-Suonio, Hannu/0000-0002-4618-3063; Burigana,
Carlo/0000-0002-3005-5796; Bouchet, Francois/0000-0002-8051-2924;
Ricciardi, Sara/0000-0002-3807-4043; Villa,
Fabrizio/0000-0003-1798-861X; Peel, Mike/0000-0003-3412-2586
FU ESA Member States; NASA; ESA; CNES; CNRS/INSU-IN2P3-INP (France); ASI;
CNR; INAF (Italy); DoE (USA); STFC; UKSA (UK); CSIC; MICINN; JA; RES
(Spain); Tekes; AoF; CSC (Finland); DLR; MPG (Germany); CSA (Canada);
DTU Space (Denmark); SER/SSO (Switzerland);; RCN (Norway); SFI
(Ireland); FCT/MCTES (Portugal)
FX Based on observations obtained with Planck (http://www.esa.int/Planck),
an ESA science mission with instruments and contributions directly
funded by ESA Member States, NASA, and Canada. The development of Planck
has been supported by: ESA; CNES and CNRS/INSU-IN2P3-INP (France); ASI,
CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC,
MICINN, JA and RES (Spain); Tekes, AoF and CSC (Finland); DLR and MPG
(Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN
(Norway); SFI (Ireland); FCT/MCTES (Portugal); and the development of
Planck has been supported by: ESA; CNES and CNRS/INSU-IN2P3-INP
(France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA
(UK); CSIC, MICINN and JA (Spain); Tekes, AoF and CSC (Finland); DLR and
MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland);
RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); and PRACE (EU). A
description of the Planck Collaboration and a list of its members,
including the technical or scientific activities in which they have been
involved, can be found at
http://www.sciops.esa.int/index.php?project=planck&page=Planck_Collabora
tion. We acknowledge the use of the HEALPix (Gorski et al. 2005) package
and of the LAMBDA website http://lambda.gsfc.nasa.gov.
NR 94
TC 8
Z9 8
U1 1
U2 25
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD SEP
PY 2013
VL 557
AR A53
DI 10.1051/0004-6361/201321160
PG 20
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 228TC
UT WOS:000325211900040
ER
PT J
AU Ade, PAR
Aghanim, N
Arnaud, M
Ashdown, M
Atrio-Barandela, F
Aumont, J
Baccigalupi, C
Balbi, A
Banday, AJ
Barreiro, RB
Barrena, R
Bartlett, JG
Battaner, E
Benabed, K
Bernard, JP
Bersanelli, M
Bikmaev, I
Bock, JJ
Bohringer, H
Bonaldi, A
Bond, JR
Borrill, J
Bouchet, FR
Bourdin, H
Burenin, R
Burigana, C
Butler, RC
Cabella, P
Chamballu, A
Chary, RR
Chiang, LY
Chon, G
Christensen, PR
Clements, DL
Colafrancesco, S
Colombi, S
Colombo, LPL
Comis, B
Coulais, A
Crill, BP
Cuttaia, F
Da Silva, A
Dahle, H
Davis, RJ
de Bernardis, P
de Gasperis, G
de Rosa, A
de Zotti, G
Delabrouille, J
Democles, J
Diego, JM
Dole, H
Donzelli, S
Dore, O
Douspis, M
Dupac, X
Efstathiou, G
Ensslin, TA
Finelli, F
Flores-Cacho, I
Forni, O
Frailis, M
Franceschi, E
Frommert, M
Galeotta, S
Ganga, K
Genova-Santos, RT
Giard, M
Giraud-Heraud, Y
Gonzalez-Nuevo, J
Gorski, KM
Gregorio, A
Gruppuso, A
Hansen, FK
Harrison, D
Hernandez-Monteagudo, C
Herranz, D
Hildebrandt, SR
Hivon, E
Hobson, M
Holmes, WA
Hornstrup, A
Hovest, W
Huffenberger, KM
Hurier, G
Jaffe, TR
Jaffe, AH
Jones, WC
Juvela, M
Keihanen, E
Keskitalo, R
Khamitov, I
Kisner, TS
Kneissl, R
Knoche, J
Kunz, M
Kurki-Suonio, H
Laheenmaki, A
Lamarre, JM
Lasenby, A
Lawrence, CR
Le Jeune, M
Leonardi, R
Lilje, PB
Linden-Vornle, M
Lopez-Caniego, M
Lubin, PM
Luzzi, G
Macias-Perez, JF
MacTavish, CJ
Maffei, B
Maino, D
Mandolesi, N
Maris, M
Marleau, F
Marshall, DJ
Martinez-Gonzalez, E
Masi, S
Massardi, M
Matarrese, S
Mazzotta, P
Mei, S
Melchiorri, A
Melin, JB
Mendes, L
Mennella, A
Mitra, S
Miville-Deschenes, MA
Moneti, A
Montier, L
Morgante, G
Mortlock, D
Munshi, D
Murphy, JA
Naselsky, P
Nati, F
Natoli, P
Norgaard-Nielsen, HU
Noviello, F
Novikov, D
Novikov, I
Osborne, S
Oxborrow, CA
Pajot, F
Paoletti, D
Perotto, L
Perrotta, F
Piacentini, F
Piat, M
Pierpaoli, E
Piffaretti, R
Plaszczynski, S
Pointecouteau, E
Polenta, G
Popa, L
Poutanen, T
Pratt, GW
Prunet, S
Puget, JL
Rachen, JP
Rebolo, R
Reinecke, M
Remazeilles, M
Renault, C
Ricciardi, S
Ristorcelli, I
Rocha, G
Roman, M
Rosset, C
Rossetti, M
Rubino-Martin, JA
Rusholme, B
Sandri, M
Savini, G
Scott, D
Spencer, L
Starck, JL
Stolyarov, V
Sudiwala, R
Sunyaev, R
Sutton, D
Suur-Uski, AS
Sygnet, JF
Tauber, JA
Terenzi, L
Toffolatti, L
Tomasi, M
Tristram, M
Valenziano, L
Van Tent, B
Vielva, P
Villa, F
Vittorio, N
Wade, LA
Wandelt, BD
Wang, W
Welikala, N
Weller, J
White, SDM
White, M
Yvon, D
Zacchei, A
Zonca, A
AF Ade, P. A. R.
Aghanim, N.
Arnaud, M.
Ashdown, M.
Atrio-Barandela, F.
Aumont, J.
Baccigalupi, C.
Balbi, A.
Banday, A. J.
Barreiro, R. B.
Barrena, R.
Bartlett, J. G.
Battaner, E.
Benabed, K.
Bernard, J. -P.
Bersanelli, M.
Bikmaev, I.
Bock, J. J.
Boehringer, H.
Bonaldi, A.
Bond, J. R.
Borrill, J.
Bouchet, F. R.
Bourdin, H.
Burenin, R.
Burigana, C.
Butler, R. C.
Cabella, P.
Chamballu, A.
Chary, R. -R.
Chiang, L. -Y
Chon, G.
Christensen, P. R.
Clements, D. L.
Colafrancesco, S.
Colombi, S.
Colombo, L. P. L.
Comis, B.
Coulais, A.
Crill, B. P.
Cuttaia, F.
Da Silva, A.
Dahle, H.
Davis, R. J.
de Bernardis, P.
de Gasperis, G.
de Rosa, A.
de Zotti, G.
Delabrouille, J.
Democles, J.
Diego, J. M.
Dole, H.
Donzelli, S.
Dore, O.
Douspis, M.
Dupac, X.
Efstathiou, G.
Ensslin, T. A.
Finelli, F.
Flores-Cacho, I.
Forni, O.
Frailis, M.
Franceschi, E.
Frommert, M.
Galeotta, S.
Ganga, K.
Genova-Santos, R. T.
Giard, M.
Giraud-Heraud, Y.
Gonzalez-Nuevo, J.
Gorski, K. M.
Gregorio, A.
Gruppuso, A.
Hansen, F. K.
Harrison, D.
Hernandez-Monteagudo, C.
Herranz, D.
Hildebrandt, S. R.
Hivon, E.
Hobson, M.
Holmes, W. A.
Hornstrup, A.
Hovest, W.
Huffenberger, K. M.
Hurier, G.
Jaffe, T. R.
Jaffe, A. H.
Jones, W. C.
Juvela, M.
Keihanen, E.
Keskitalo, R.
Khamitov, I.
Kisner, T. S.
Kneissl, R.
Knoche, J.
Kunz, M.
Kurki-Suonio, H.
Laheenmaki, A.
Lamarre, J. -M.
Lasenby, A.
Lawrence, C. R.
Le Jeune, M.
Leonardi, R.
Lilje, P. B.
Linden-Vornle, M.
Lopez-Caniego, M.
Lubin, P. M.
Luzzi, G.
Macias-Perez, J. F.
MacTavish, C. J.
Maffei, B.
Maino, D.
Mandolesi, N.
Maris, M.
Marleau, F.
Marshall, D. J.
Martinez-Gonzalez, E.
Masi, S.
Massardi, M.
Matarrese, S.
Mazzotta, P.
Mei, S.
Melchiorri, A.
Melin, J. -B.
Mendes, L.
Mennella, A.
Mitra, S.
Miville-Deschenes, M. -A.
Moneti, A.
Montier, L.
Morgante, G.
Mortlock, D.
Munshi, D.
Murphy, J. A.
Naselsky, P.
Nati, F.
Natoli, P.
Norgaard-Nielsen, H. U.
Noviello, F.
Novikov, D.
Novikov, I.
Osborne, S.
Oxborrow, C. A.
Pajot, F.
Paoletti, D.
Perotto, L.
Perrotta, F.
Piacentini, F.
Piat, M.
Pierpaoli, E.
Piffaretti, R.
Plaszczynski, S.
Pointecouteau, E.
Polenta, G.
Popa, L.
Poutanen, T.
Pratt, G. W.
Prunet, S.
Puget, J. -L.
Rachen, J. P.
Rebolo, R.
Reinecke, M.
Remazeilles, M.
Renault, C.
Ricciardi, S.
Ristorcelli, I.
Rocha, G.
Roman, M.
Rosset, C.
Rossetti, M.
Rubino-Martin, J. A.
Rusholme, B.
Sandri, M.
Savini, G.
Scott, D.
Spencer, L.
Starck, J. -L.
Stolyarov, V.
Sudiwala, R.
Sunyaev, R.
Sutton, D.
Suur-Uski, A. -S.
Sygnet, J. -F.
Tauber, J. A.
Terenzi, L.
Toffolatti, L.
Tomasi, M.
Tristram, M.
Valenziano, L.
Van Tent, B.
Vielva, P.
Villa, F.
Vittorio, N.
Wade, L. A.
Wandelt, B. D.
Wang, W.
Welikala, N.
Weller, J.
White, S. D. M.
White, M.
Yvon, D.
Zacchei, A.
Zonca, A.
CA Planck Collaboration
TI Planck intermediate results XI. The gas content of dark matter halos:
the Sunyaev-Zeldovich-stellar mass relation for locally brightest
galaxies
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE cosmology: observations; cosmic background radiation; large-scale
structure of Universe; galaxies: clusters: general
ID ACTIVE GALACTIC NUCLEI; SOUTH-POLE TELESCOPE; DIGITAL SKY SURVEY;
PRE-LAUNCH STATUS; BLACK-HOLES; INTRACLUSTER MEDIUM; SCALING RELATIONS;
COOLING FLOWS; AGN FEEDBACK; CLUSTERS
AB We present the scaling relation between Sunyaev-Zeldovich (SZ) signal and stellar mass for almost 260,000 locally brightest galaxies (LBGs) selected from the Sloan Digital Sky Survey (SDSS). These are predominantly the central galaxies of their dark matter halos. We calibrate the stellar-to-halo mass conversion using realistic mock catalogues based on the Millennium Simulation. Applying a multi-frequency matched filter to the Planck data for each LBG, and averaging the results in bins of stellar mass, we measure the mean SZ signal down to M-* similar to 2 x 10(11) M-circle dot, with a clear indication of signal at even lower stellar mass. We derive the scaling relation between SZ signal and halo mass by assigning halo properties from our mock catalogues to the real LBGs and simulating the Planck observation process. This relation shows no evidence for deviation from a power law over a halo mass range extending from rich clusters down to M-500 similar to 2 x 10(13) M-circle dot, and there is a clear indication of signal down to M-500 similar to 4 x 10(12) M-circle dot. Planck's SZ detections in such low-mass halos imply that about a quarter of all baryons have now been seen in the form of hot halo gas, and that this gas must be less concentrated than the dark matter in such halos in order to remain consistent with X-ray observations. At the high-mass end, the measured SZ signal is 20 % lower than found from observations of X-ray clusters, a difference consistent with the magnitude of Malmquist bias effects that were previously estimated for the X-ray sample.
C1 [Bartlett, J. G.; Delabrouille, J.; Ganga, K.; Giraud-Heraud, Y.; Le Jeune, M.; Piat, M.; Remazeilles, M.; Roman, M.; Rosset, C.] Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, APC,CNRS,IN2P3,CEA lrfu, F-75205 Paris 13, France.
[Laheenmaki, A.; Poutanen, T.] Aalto Univ, Metsahovi Radio Observ, Kylmala 02540, Finland.
[Bikmaev, I.] Acad Sci Tatarstan, Kazan 420111, Russia.
[Kunz, M.] African Inst Math Sci, Cape Town, South Africa.
[Natoli, P.; Polenta, G.] Agenzia Spaziale Italiana Sci Data Ctr, Frascati, Italy.
[Mandolesi, N.] Agenzia Spaziale Italiana, Rome, Italy.
[Ashdown, M.; Hobson, M.; Lasenby, A.; Stolyarov, V.] Univ Cambridge, Cavendish Lab, Astrophys Grp, Cambridge CB3 0HE, England.
[Kneissl, R.] ALMA Santiago Cent Off, Santiago 0355, Chile.
[Bond, J. R.; Miville-Deschenes, M. -A.] Univ Toronto, CITA, Toronto, ON M5S 3H8, Canada.
[Banday, A. J.; Bernard, J. -P.; Flores-Cacho, I.; Forni, O.; Giard, M.; Jaffe, T. R.; Montier, L.; Pointecouteau, E.; Ristorcelli, I.] CNRS, IRAP, F-31028 Toulouse, France.
[Bock, J. J.; Crill, B. P.; Dore, O.; Hildebrandt, S. R.; Mei, S.; Rocha, G.] CALTECH, Pasadena, CA 91125 USA.
[Da Silva, A.] Univ Porto, Ctr Astrofis, P-4150762 Oporto, Portugal.
[Hernandez-Monteagudo, C.] CEFCA, Teruel 44001, Spain.
[Borrill, J.; Keskitalo, R.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Computat Cosmol Ctr, Berkeley, CA 94720 USA.
[Rebolo, R.] CSIC, Madrid, Spain.
[Chamballu, A.; Melin, J. -B.; Piffaretti, R.; Yvon, D.] CEA Saclay, DSM, Irfu, SPP, F-91191 Gif Sur Yvette, France.
[Hornstrup, A.; Linden-Vornle, M.; Norgaard-Nielsen, H. U.; Oxborrow, C. A.] Tech Univ Denmark, Natl Space Inst, DTU Space, DK-2800 Lyngby, Denmark.
[Frommert, M.; Kunz, M.] Univ Geneva, Dept Phys Theor, CH-1211 Geneva, Switzerland.
[Atrio-Barandela, F.] Univ Salamanca, Fac Ciencias, Dept Fis Fundamental, E-37008 Salamanca, Spain.
[Toffolatti, L.] Univ Oviedo, Dept Fis, E-33007 Oviedo, Spain.
[Bikmaev, I.; Khamitov, I.] Kazan Fed Univ, Dept Astron & Geodesy, Kazan 420008, Russia.
[Rachen, J. P.] Radboud Univ Nijmegen, IMAPP, Dept Astrophys, NL-6500 GL Nijmegen, Netherlands.
[Keskitalo, R.] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA.
[Scott, D.] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V5Z 1M9, Canada.
[Colombo, L. P. L.; Pierpaoli, E.] Univ So Calif, Dana & David Dornsife Coll Letter Arts & Sci, Dept Phys & Astron, Los Angeles, CA 90089 USA.
[Juvela, M.; Keihanen, E.; Kurki-Suonio, H.; Poutanen, T.; Suur-Uski, A. -S.] Univ Helsinki, Dept Phys, Helsinki, Finland.
[Jones, W. C.] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA.
[White, M.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Lubin, P. M.; Zonca, A.] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
[Wandelt, B. D.] Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
[Matarrese, S.] Univ Padua, Dipartimento Fis Astron G Galilei, I-35131 Padua, Italy.
[Burigana, C.; Mandolesi, N.; Natoli, P.] Univ Ferrara, Dipartimento Fis & Sci Terra, I-44122 Ferrara, Italy.
[de Bernardis, P.; Masi, S.; Melchiorri, A.; Nati, F.; Piacentini, F.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
[Bersanelli, M.; Maino, D.; Mennella, A.; Rossetti, M.] Univ Milan, Dipartimento Fis, Milan, Italy.
[Gregorio, A.] Univ Trieste, Dipartimento Fis, Trieste, Italy.
[Balbi, A.; Bourdin, H.; de Gasperis, G.; Mazzotta, P.; Vittorio, N.] Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy.
[Cabella, P.] Univ Roma Tor Vergata, Dipartimento Matemat, I-00133 Rome, Italy.
[Christensen, P. R.; Naselsky, P.] Niels Bohr Inst, Discovery Ctr, DK-2100 Copenhagen, Denmark.
[Rebolo, R.; Rubino-Martin, J. A.] Univ La Laguna, Dpto Astrofis, Tenerife, Spain.
[Kneissl, R.] European So Observ, ESO Vitacura, Santiago 19, Chile.
[Dupac, X.; Leonardi, R.; Mendes, L.] European Space Agcy, Planck Sci Off, Madrid, Spain.
[Tauber, J. A.] European Space Agcy, Estec, NL-2201 AZ Noordwijk, Netherlands.
[Mei, S.] Observ Paris, GEPI, Sect Meudon, F-92195 Meudon, France.
[Kurki-Suonio, H.; Laheenmaki, A.; Poutanen, T.; Suur-Uski, A. -S.] Univ Helsinki, Helsinki Inst Phys, Helsinki, Finland.
[de Zotti, G.] Osserv Astron Padova, INAF, Padua, Italy.
[Colafrancesco, S.; Polenta, G.] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, Italy.
[Frailis, M.; Galeotta, S.; Gregorio, A.; Maris, M.; Zacchei, A.] Osserv Astron Trieste, INAF, I-34131 Trieste, Italy.
[Massardi, M.] CNR, Ist Radioastron, INAF, I-40129 Bologna, Italy.
[Burigana, C.; Butler, R. C.; Cuttaia, F.; de Rosa, A.; Finelli, F.; Franceschi, E.; Gruppuso, A.; Mandolesi, N.; Morgante, G.; Natoli, P.; Paoletti, D.; Sandri, M.; Terenzi, L.; Valenziano, L.; Villa, F.] IASF Bologna, INAF, Bologna, Italy.
[Bersanelli, M.; Donzelli, S.; Maino, D.; Mennella, A.; Rossetti, M.; Tomasi, M.] IASF Milano, INAF, Milan, Italy.
[Finelli, F.; Paoletti, D.] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy.
[Melchiorri, A.] Univ Roma Sapienza, INFN, Sez Roma 1, I-00185 Rome, Italy.
[Mitra, S.] IUCAA, Pune 411007, Maharashtra, India.
[Clements, D. L.; Jaffe, A. H.; Mortlock, D.; Novikov, D.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2AZ, England.
[Chary, R. -R.; Rusholme, B.] CALTECH, Infrared Proc & Anal Ctr, Pasadena, CA 91125 USA.
[Dole, H.] Inst Univ France, F-75005 Paris, France.
[Aghanim, N.; Aumont, J.; Chamballu, A.; Dole, H.; Douspis, M.; Kunz, M.; Miville-Deschenes, M. -A.; Pajot, F.; Puget, J. -L.; Remazeilles, M.; Welikala, N.] Univ Paris Sud 11, CNRS, Inst Astrophys Spatiale, UMR 8617, Orsay, France.
[Benabed, K.; Bouchet, F. R.; Colombi, S.; Hivon, E.; Moneti, A.; Prunet, S.; Ricciardi, S.; Sygnet, J. -F.; Wandelt, B. D.] CNRS, Inst Astrophys Paris, UMR 7095, F-75014 Paris, France.
[Popa, L.] Inst Space Sci, Bucharest, Romania.
[Marleau, F.] Univ Innsbruck, Inst Astro & Particle Phys, A-6020 Innsbruck, Austria.
[Chiang, L. -Y] Acad Sinica, Inst Astron & Astrophys, Taipei 115, Taiwan.
[Efstathiou, G.; Harrison, D.; Sutton, D.] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.
[Dahle, H.; Hansen, F. K.; Lilje, P. B.] Univ Oslo, Inst Theoret Astrophys, Oslo, Norway.
[Barrena, R.; Rebolo, R.; Rubino-Martin, J. A.] Inst Astrofis Canarias, Tenerife, Spain.
[Barreiro, R. B.; Diego, J. M.; Gonzalez-Nuevo, J.; Herranz, D.; Lopez-Caniego, M.; Martinez-Gonzalez, E.; Toffolatti, L.; Vielva, P.] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain.
[Bartlett, J. G.; Bock, J. J.; Colombo, L. P. L.; Crill, B. P.; Dore, O.; Gorski, K. M.; Holmes, W. A.; Lawrence, C. R.; Mitra, S.; Rocha, G.; Wade, L. A.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
[Bonaldi, A.; Davis, R. J.; Maffei, B.; Noviello, F.] Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England.
[Ashdown, M.; Harrison, D.; Lasenby, A.; MacTavish, C. J.; Stolyarov, V.; Sutton, D.] Kavli Inst Cosmol Cambridge, Cambridge CB3 0HA, England.
[Luzzi, G.; Plaszczynski, S.; Tristram, M.] Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France.
[Coulais, A.; Lamarre, J. -M.] Observ Paris, CNRS, LERMA, F-75014 Paris, France.
[Arnaud, M.; Chamballu, A.; Democles, J.; Marshall, D. J.; Piffaretti, R.; Pratt, G. W.; Starck, J. -L.] CEA Saclay, Univ Paris Diderot, CNRS, CEA,DSM,IRFU,Serv Astrophys,Lab AIM, F-91191 Gif Sur Yvette, France.
[Comis, B.; Hurier, G.; Macias-Perez, J. F.; Perotto, L.; Renault, C.] Univ Joseph Fourier Grenoble I, Inst Natl Polytech Grenoble, CNRS IN2P3, Lab Phys Subatom & Cosmol, F-38026 Grenoble, France.
[Van Tent, B.] Univ Paris Sud 11, Phys Theor Lab, F-91405 Orsay, France.
[Van Tent, B.] CNRS, F-91405 Orsay, France.
[Kisner, T. S.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Ensslin, T. A.; Hernandez-Monteagudo, C.; Hovest, W.; Knoche, J.; Rachen, J. P.; Reinecke, M.; Sunyaev, R.; Wang, W.; White, S. D. M.] Max Planck Inst Astrophys, D-85741 Garching, Germany.
[Boehringer, H.; Chon, G.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Murphy, J. A.] Natl Univ Ireland, Dept Expt Phys, Maynooth, Kildare, Ireland.
[Christensen, P. R.; Naselsky, P.; Novikov, I.] Niels Bohr Inst, DK-2100 Copenhagen, Denmark.
[Savini, G.] UCL, Opt Sci Lab, London, England.
[Baccigalupi, C.; de Zotti, G.; Gonzalez-Nuevo, J.; Perrotta, F.] SISSA, Astrophys Sect, I-34136 Trieste, Italy.
[Ade, P. A. R.; Munshi, D.; Spencer, L.; Sudiwala, R.] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, Wales.
[Burenin, R.; Sunyaev, R.] Space Res Inst IKI, Moscow, Russia.
[Borrill, J.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Stolyarov, V.] Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Zelenchukskiy, Russia.
[Osborne, S.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Khamitov, I.] TUBITAK Natl Observ, TR-07058 Antalya, Turkey.
[Benabed, K.; Bouchet, F. R.; Colombi, S.; Hivon, E.; Prunet, S.; Ricciardi, S.; Wandelt, B. D.] Univ Paris 06, UMR 7095, F-75014 Paris, France.
[Mei, S.] Univ Denis Diderot Paris 7, F-75205 Paris 13, France.
[Banday, A. J.; Flores-Cacho, I.; Forni, O.; Giard, M.; Jaffe, T. R.; Montier, L.; Pointecouteau, E.; Ristorcelli, I.] Univ Toulouse, UPS OMP, IRAP, F-31028 Toulouse, France.
[Weller, J.] Univ Munich, Univ Observ, D-81679 Munich, Germany.
[Battaner, E.] Univ Granada, Fac Ciencias, Dept Fisica Teor & Cosmos, Granada, Spain.
[Huffenberger, K. M.] Univ Miami, Coral Gables, FL 33124 USA.
[Gorski, K. M.] Univ Warsaw Observ, PL-00478 Warsaw, Poland.
RP Rubino-Martin, JA (reprint author), Inst Astrofis Canarias, C-Via Lactea S-N, Tenerife, Spain.
EM jalberto@iac.es
RI Remazeilles, Mathieu/N-1793-2015; Novikov, Dmitry/P-1807-2015;
Kurki-Suonio, Hannu/B-8502-2016; Tomasi, Maurizio/I-1234-2016; Novikov,
Igor/N-5098-2015; Colombo, Loris/J-2415-2016; Nati,
Federico/I-4469-2016; popa, lucia/B-4718-2012; Piacentini,
Francesco/E-7234-2010; Atrio-Barandela, Fernando/A-7379-2017; Stolyarov,
Vladislav/C-5656-2017; Mazzotta, Pasquale/B-1225-2016; Lopez-Caniego,
Marcos/M-4695-2013; Da Silva, Antonio/A-2693-2010; Bouchet,
Francois/B-5202-2014; Vielva, Patricio/F-6745-2014; Toffolatti,
Luigi/K-5070-2014; Herranz, Diego/K-9143-2014; Battaner,
Eduardo/P-7019-2014; Barreiro, Rita Belen/N-5442-2014; Yvon,
Dominique/D-2280-2015; Martinez-Gonzalez, Enrique/E-9534-2015;
Gonzalez-Nuevo, Joaquin/I-3562-2014; White, Martin/I-3880-2015;
Gruppuso, Alessandro/N-5592-2015; Butler, Reginald/N-4647-2015;
OI Valenziano, Luca/0000-0002-1170-0104; Galeotta,
Samuele/0000-0002-3748-5115; WANDELT, Benjamin/0000-0002-5854-8269;
Finelli, Fabio/0000-0002-6694-3269; Frailis, Marco/0000-0002-7400-2135;
Weller, Jochen/0000-0002-8282-2010; Lopez-Caniego,
Marcos/0000-0003-1016-9283; Gregorio, Anna/0000-0003-4028-8785; Polenta,
Gianluca/0000-0003-4067-9196; Matarrese, Sabino/0000-0002-2573-1243;
Scott, Douglas/0000-0002-6878-9840; Masi, Silvia/0000-0001-5105-1439; de
Bernardis, Paolo/0000-0001-6547-6446; Forni,
Olivier/0000-0001-6772-9689; Morgante, Gianluca/0000-0001-9234-7412;
Remazeilles, Mathieu/0000-0001-9126-6266; Maris,
Michele/0000-0001-9442-2754; Franceschi, Enrico/0000-0002-0585-6591;
Kurki-Suonio, Hannu/0000-0002-4618-3063; Tomasi,
Maurizio/0000-0002-1448-6131; Colombo, Loris/0000-0003-4572-7732; Nati,
Federico/0000-0002-8307-5088; Piacentini, Francesco/0000-0002-5444-9327;
Atrio-Barandela, Fernando/0000-0002-2130-2513; Stolyarov,
Vladislav/0000-0001-8151-828X; Mazzotta, Pasquale/0000-0002-5411-1748;
Rubino-Martin, Jose Alberto/0000-0001-5289-3021; De Zotti,
Gianfranco/0000-0003-2868-2595; Da Silva, Antonio/0000-0002-6385-1609;
Vielva, Patricio/0000-0003-0051-272X; Toffolatti,
Luigi/0000-0003-2645-7386; Herranz, Diego/0000-0003-4540-1417; Barreiro,
Rita Belen/0000-0002-6139-4272; Martinez-Gonzalez,
Enrique/0000-0002-0179-8590; Gonzalez-Nuevo,
Joaquin/0000-0003-1354-6822; White, Martin/0000-0001-9912-5070;
Gruppuso, Alessandro/0000-0001-9272-5292; Butler,
Reginald/0000-0003-4366-5996; Sandri, Maura/0000-0003-4806-5375;
Cuttaia, Francesco/0000-0001-6608-5017; Huffenberger,
Kevin/0000-0001-7109-0099; Burigana, Carlo/0000-0002-3005-5796; Bouchet,
Francois/0000-0002-8051-2924; Ricciardi, Sara/0000-0002-3807-4043;
Lilje, Per/0000-0003-4324-7794; Paoletti, Daniela/0000-0003-4761-6147;
Savini, Giorgio/0000-0003-4449-9416; Pierpaoli,
Elena/0000-0002-7957-8993; Villa, Fabrizio/0000-0003-1798-861X; TERENZI,
LUCA/0000-0001-9915-6379; Starck, Jean-Luc/0000-0003-2177-7794; Hurier,
Guillaume/0000-0002-1215-0706; Zacchei, Andrea/0000-0003-0396-1192;
Hivon, Eric/0000-0003-1880-2733
FU CNES; CNRS; ASI; NASA; Danish Natural Research Council; ESA;
CNRS/INSU-IN2P3-INP (France); INAF (Italy); DoE (USA); STFC; UKSA (UK);
CSIC; MICINN; JA; RES (Spain); Tekes; AoF; CSC (Finland); DLR; MPG
(Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN
(Norway); SFI (Ireland); FCT/MCTES (Portugal); PRACE (EU)
FX The authors from the consortia funded principally by CNES, CNRS, ASI,
NASA, and Danish Natural Research Council acknowledge the use of the
pipeline-running infrastructures Magique3 at Institut d'Astrophysique de
Paris (France), CPAC at Cambridge (UK), and USPDC at IPAC (USA). The
development of Planck has been supported by: ESA; CNES and
CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE
(USA); STFC and UKSA (UK); CSIC, MICINN, JA and RES (Spain); Tekes, AoF
and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space
(Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES
(Portugal); and PRACE (EU). A description of the Planck Collaboration
and a list of its members, including the technical or scientific
activities in which they have been involved, can be found at
http://www.sciops.esa.int/index.php?project=planck. We acknowledge the
use of the HEALPix package (Gorski et al. 2005).
NR 81
TC 23
Z9 23
U1 1
U2 26
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
FRANCE
SN 0004-6361
EI 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD SEP
PY 2013
VL 557
AR A52
DI 10.1051/0004-6361/201220941
PG 17
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 228TC
UT WOS:000325211900027
ER
PT J
AU Schmelling, M
Hashim, NO
Grupen, C
Luitz, S
Maciuc, F
Mailov, A
Muller, AS
Sander, HG
Schmeling, S
Tcaciuc, R
Wachsmuth, H
Ziegler, T
Zuber, K
AF Schmelling, M.
Hashim, N. O.
Grupen, C.
Luitz, S.
Maciuc, F.
Mailov, A.
Mueller, A. -S.
Sander, H. -G.
Schmeling, S.
Tcaciuc, R.
Wachsmuth, H.
Ziegler, T.
Zuber, K.
CA CosmoALEPH Collaboration
TI Spectrum and charge ratio of vertical cosmic ray muons up to momenta of
2.5 TeV/c
SO ASTROPARTICLE PHYSICS
LA English
DT Article
DE Cosmic ray muons; Momentum spectrum; Charge ratio; Chemical composition
of primary cosmic rays; ALEPH; Underground measurement
ID HADRONIC-INTERACTIONS; SIMULATION; ENERGIES; MODEL; CASCADES
AB The ALEPH detector at LEP has been used to measure the momentum spectrum and charge ratio of vertical cosmic ray muons underground. The sea-level cosmic ray muon spectrum for momenta up to 2.5 TeV/c has been obtained by correcting for the overburden of 320 m water equivalent (mwe). The results are compared with Monte Carlo models for air shower development in the atmosphere. From the analysis of the spectrum the total flux and the spectral index of the cosmic ray primaries is inferred. The charge ratio suggests a dominantly light composition of cosmic ray primaries with energies in the energy range between 10(3) and 10(5) GeV. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.
C1 [Schmelling, M.; Maciuc, F.] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
[Hashim, N. O.] Kenyatta Univ, Dept Phys, Nairobi, Kenya.
[Grupen, C.; Tcaciuc, R.] Univ Siegen, Dept Phys, Fac Sci & Technol, D-57068 Siegen, Germany.
[Luitz, S.] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
[Mailov, A.] IDRAK Technol Transfer, Baku, Azerbaijan.
[Mueller, A. -S.] Karlsruhe Inst Technol, D-76021 Karlsruhe, Germany.
[Sander, H. -G.] Johannes Gutenberg Univ Mainz, Inst Phys, Mainz, Germany.
[Schmeling, S.; Wachsmuth, H.] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland.
[Ziegler, T.] SIX Telekurs Ltd, Zurich, Switzerland.
[Zuber, K.] Tech Univ Dresden, Inst Kern & Teilchenphys, Dresden, Germany.
RP Schmelling, M (reprint author), Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
EM Michael.Schmelling@mpi-hd.mpg.de
RI MACIUC, Florin/B-9903-2016
OI MACIUC, Florin/0000-0001-6651-9436
FU Deutsche Forschungsgemeinschaft [DFG/Gr/1796/1-3]
FX The authors gratefully acknowledge the help of the ALEPH collaboration,
and in particular Markus Frank, Beat Jost, Alois Putzer and Bertram
Rensch in doing the measurements. The analysis of the CosmoALEPH
experiment has been supported by the Deutsche Forschungsgemeinschaft
under Grant DFG/Gr/1796/1-3.
NR 26
TC 0
Z9 0
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-6505
EI 1873-2852
J9 ASTROPART PHYS
JI Astropart Phys.
PD SEP
PY 2013
VL 49
BP 1
EP 5
DI 10.1016/j.astropartphys.2013.07.008
PG 5
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 239EZ
UT WOS:000326006700001
ER
PT J
AU Alexander, T
Alton, D
Arisaka, K
Back, HO
Beltrame, P
Benziger, J
Bonfini, G
Brigatti, A
Brodsky, J
Cadonati, L
Calaprice, F
Candela, A
Cao, H
Cavalcante, P
Chavarria, A
Chepurnov, A
Cline, D
Cocco, AG
Condon, C
D'Angelo, D
Davini, S
De Haas, E
Derbin, A
Di Pietro, G
Dratchnev, I
Durben, D
Empl, A
Etenko, A
Fan, A
Fiorillo, G
Fomenko, K
Gabriele, F
Galbiati, C
Gazzana, S
Ghag, C
Ghiano, C
Goretti, A
Grandi, L
Gromov, M
Guan, M
Guo, C
Guray, G
Hungerford, EV
Ianni, A
Ianni, A
Kayunov, A
Keeter, K
Kendziora, C
Kidner, S
Kobychev, V
Koh, G
Korablev, D
Korga, G
Shields, E
Li, P
Loer, B
Lombardi, P
Love, C
Ludhova, L
Lukyanchenko, L
Lund, A
Lung, K
Ma, Y
Machulin, I
Maricic, J
Martoff, CJ
Meng, Y
Meroni, E
Meyers, PD
Mohayai, T
Montanari, D
Montuschi, M
Mosteiro, P
Mount, B
Muratova, V
Nelson, A
Nemtzow, A
Nurakhov, N
Orsini, M
Ortica, F
Pallavicini, M
Pantic, E
Parmeggiano, S
Parsells, R
Pelliccia, N
Perasso, L
Perfetto, F
Pinsky, L
Pocar, A
Pordes, S
Ranucci, G
Razeto, A
Romani, A
Rossi, N
Saggese, P
Saldanha, R
Salvo, C
Sands, W
Seigar, M
Semenov, D
Skorokhvatov, M
Smirnov, O
Sotnikov, A
Sukhotin, S
Suvorov, Y
Tartaglia, R
Tatarowicz, J
Testera, G
Teymourian, A
Thompson, J
Unzhakov, E
Vogelaar, RB
Wang, H
Westerdale, S
Wojcik, M
Wright, A
Xu, J
Yang, C
Zavatarelli, S
Zehfus, M
Zhong, W
Zuzel, G
AF Alexander, T.
Alton, D.
Arisaka, K.
Back, H. O.
Beltrame, P.
Benziger, J.
Bonfini, G.
Brigatti, A.
Brodsky, J.
Cadonati, L.
Calaprice, F.
Candela, A.
Cao, H.
Cavalcante, P.
Chavarria, A.
Chepurnov, A.
Cline, D.
Cocco, A. G.
Condon, C.
D'Angelo, D.
Davini, S.
De Haas, E.
Derbin, A.
Di Pietro, G.
Dratchnev, I.
Durben, D.
Empl, A.
Etenko, A.
Fan, A.
Fiorillo, G.
Fomenko, K.
Gabriele, F.
Galbiati, C.
Gazzana, S.
Ghag, C.
Ghiano, C.
Goretti, A.
Grandi, L.
Gromov, M.
Guan, M.
Guo, C.
Guray, G.
Hungerford, E. V.
Ianni, Al.
Ianni, An.
Kayunov, A.
Keeter, K.
Kendziora, C.
Kidner, S.
Kobychev, V.
Koh, G.
Korablev, D.
Korga, G.
Shields, E.
Li, P.
Loer, B.
Lombardi, P.
Love, C.
Ludhova, L.
Lukyanchenko, L.
Lund, A.
Lung, K.
Ma, Y.
Machulin, I.
Maricic, J.
Martoff, C. J.
Meng, Y.
Meroni, E.
Meyers, P. D.
Mohayai, T.
Montanari, D.
Montuschi, M.
Mosteiro, P.
Mount, B.
Muratova, V.
Nelson, A.
Nemtzow, A.
Nurakhov, N.
Orsini, M.
Ortica, F.
Pallavicini, M.
Pantic, E.
Parmeggiano, S.
Parsells, R.
Pelliccia, N.
Perasso, L.
Perfetto, F.
Pinsky, L.
Pocar, A.
Pordes, S.
Ranucci, G.
Razeto, A.
Romani, A.
Rossi, N.
Saggese, P.
Saldanha, R.
Salvo, C.
Sands, W.
Seigar, M.
Semenov, D.
Skorokhvatov, M.
Smirnov, O.
Sotnikov, A.
Sukhotin, S.
Suvorov, Y.
Tartaglia, R.
Tatarowicz, J.
Testera, G.
Teymourian, A.
Thompson, J.
Unzhakov, E.
Vogelaar, R. B.
Wang, H.
Westerdale, S.
Wojcik, M.
Wright, A.
Xu, J.
Yang, C.
Zavatarelli, S.
Zehfus, M.
Zhong, W.
Zuzel, G.
TI Light yield in DarkSide-10: A prototype two-phase argon TPC for dark
matter searches
SO ASTROPARTICLE PHYSICS
LA English
DT Article
DE Dark matter; Argon; Time projection chamber; Light yield; Photoelectron
yield
ID LIQUID ARGON; DEPENDENCE; PARTICLES; XENON
AB As part of the DarkSide program of direct dark matter searches using two-phase argon TPCs, a prototype detector with an active volume containing 10 kg of liquid argon, DarkSide-10, was built and operated underground in the Gran Sasso National Laboratory in Italy. A critically important parameter for such devices is the scintillation light yield, as photon statistics limits the rejection of electron-recoil backgrounds by pulse shape discrimination. We have measured the light yield of DarkSide-10 using the readily-identifiable full-absorption peaks from gamma ray sources combined with single-photoelectron calibrations using low-occupancy laser pulses. For gamma lines of energies in the range 122-1275 keV, we get light yields averaging 8.887 +/- 0.003(stat)+/- 0.444(sys) p.e./keV(ee). With additional purification, the light yield measured at 511 key increased to 9.142 +/- 0.006(stat) p.e./keV(ee). Published by Elsevier B.V.
C1 [Alton, D.] Augustana Coll, Dept Phys & Astron, Sioux Falls, SD 57197 USA.
[Durben, D.; Keeter, K.; Mount, B.; Thompson, J.; Zehfus, M.] Black Hills State Univ, Sch Nat Sci, Spearfish, SD 57799 USA.
[Maricic, J.] Drexel Univ, Dept Phys, Philadelphia, PA 19104 USA.
[Alexander, T.; Kendziora, C.; Loer, B.; Montanari, D.; Pordes, S.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[Guan, M.; Guo, C.; Li, P.; Ma, Y.; Yang, C.; Zhong, W.] Inst High Energy Phys, Beijing 100049, Peoples R China.
[Kobychev, V.] Natl Acad Sci Ukraine, Inst Nucl Res, UA-03680 Kiev, Ukraine.
[Zuzel, G.] Jagiellonian Univ, Smoluchowski Inst Phys, PL-30059 Krakow, Poland.
[Korablev, D.; Smirnov, O.; Sotnikov, A.] Joint Inst Nucl Res, Dubna 141980, Russia.
[Bonfini, G.; Candela, A.; Cavalcante, P.; Fomenko, K.; Gazzana, S.; Ghiano, C.; Ianni, Al.; Montuschi, M.; Orsini, M.; Razeto, A.; Rossi, N.; Saggese, P.; Saldanha, R.; Tartaglia, R.] Lab Nazl Gran Sasso, I-67010 Assergi, AQ, Italy.
[Chepurnov, A.] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia.
[Etenko, A.; Machulin, I.; Nurakhov, N.; Skorokhvatov, M.; Sukhotin, S.] Natl Res Ctr Kurchatov Inst, Moscow 123182, Russia.
[Benziger, J.; Gromov, M.; Lukyanchenko, L.] Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA.
[Back, H. O.; Brodsky, J.; Calaprice, F.; Cao, H.; Chavarria, A.; Condon, C.; De Haas, E.; Gabriele, F.; Galbiati, C.; Goretti, A.; Grandi, L.; Guray, G.; Ianni, An.; Koh, G.; Shields, E.; Meyers, P. D.; Mohayai, T.; Mosteiro, P.; Nelson, A.; Parsells, R.; Rossi, N.; Sands, W.; Westerdale, S.; Wright, A.; Xu, J.] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA.
[Derbin, A.; Dratchnev, I.; Kayunov, A.; Muratova, V.; Semenov, D.; Unzhakov, E.] St Petersburg Nucl Phys Inst, Gatchina 188350, Russia.
[Love, C.; Martoff, C. J.; Tatarowicz, J.] Temple Univ, Dept Phys, Philadelphia, PA 19122 USA.
[Grandi, L.] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
[Ghag, C.] UCL, Dept Phys & Astron, London WC1E 6BT, England.
[Pallavicini, M.; Perasso, L.; Salvo, C.; Testera, G.; Zavatarelli, S.] Univ Genoa, Dept Phys, I-16146 Genoa, Italy.
[Pallavicini, M.; Perasso, L.; Salvo, C.; Testera, G.; Zavatarelli, S.] Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
[Brigatti, A.; D'Angelo, D.; Di Pietro, G.; Lombardi, P.; Ludhova, L.; Meroni, E.; Parmeggiano, S.; Ranucci, G.] Univ Milan, Dept Phys, I-20133 Milan, Italy.
[Brigatti, A.; D'Angelo, D.; Di Pietro, G.; Lombardi, P.; Ludhova, L.; Meroni, E.; Parmeggiano, S.; Ranucci, G.] Ist Nazl Fis Nucl, I-20133 Milan, Italy.
[Cocco, A. G.; Fiorillo, G.; Perfetto, F.] Univ Naples Federico II, Dept Phys, I-80126 Naples, Italy.
[Cocco, A. G.; Fiorillo, G.; Perfetto, F.] Ist Nazl Fis Nucl, I-80126 Naples, Italy.
[Ortica, F.; Pelliccia, N.; Romani, A.] Univ Perugia, Dept Chem, I-06123 Perugia, Italy.
[Ortica, F.; Pelliccia, N.; Romani, A.] Ist Nazl Fis Nucl, I-06123 Perugia, Italy.
[Seigar, M.] Univ Arkansas, Dept Phys & Astron, Little Rock, AR 72204 USA.
[Arisaka, K.; Beltrame, P.; Cline, D.; Fan, A.; Meng, Y.; Pantic, E.; Suvorov, Y.; Teymourian, A.; Wang, H.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
[Davini, S.; Empl, A.; Hungerford, E. V.; Korga, G.; Pinsky, L.] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Cadonati, L.; Lund, A.; Nemtzow, A.; Pocar, A.] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA.
[Kidner, S.; Vogelaar, R. B.] Virginia Tech, Dept Phys, Blacksburg, VA 24061 USA.
RP Grandi, L (reprint author), Univ Chicago, Kavli Inst Cosmol Phys, 5620 South Ellis Ave,LASR 210, Chicago, IL 60637 USA.
EM lgrandi@uchicago.edu
RI Ortica, Fausto/C-1001-2013; Razeto, Alessandro/J-3320-2015; Pallavicini,
Marco/G-5500-2012; Ranucci, Gioacchino/O-2200-2015; Machulin,
Igor/R-9711-2016; Skorokhvatov, Mikhail/R-9735-2016; Fiorillo,
Giuliana/A-2248-2012; Romani, Aldo/G-8103-2012; DAngelo,
Davide/K-9164-2013; Kobychev, Vladislav/B-3322-2008; Galbiati,
Cristiano/I-7487-2012;
OI Ortica, Fausto/0000-0001-8276-452X; Razeto,
Alessandro/0000-0002-0578-097X; Pallavicini, Marco/0000-0001-7309-3023;
Ranucci, Gioacchino/0000-0002-3591-8191; Fiorillo,
Giuliana/0000-0002-6916-6776; Romani, Aldo/0000-0002-7338-0097; DAngelo,
Davide/0000-0001-9857-8107; Kobychev, Vladislav/0000-0003-0030-7451;
Galbiati, Cristiano/0000-0002-2409-502X; Derbin,
Alexander/0000-0002-4351-2255; Zhong, Weili/0000-0002-4566-5490;
Brodsky, Jason/0000-0002-7498-6461; Xu, Jingke/0000-0001-8084-5609;
Drachnev, Ilia/0000-0002-4064-8093; Unzhakov,
Evgeniy/0000-0003-2952-6412; Westerdale, Shawn/0000-0001-8824-6205;
Ludhova, Livia/0000-0002-3875-0590; Rossi, Nicola/0000-0002-7046-528X
FU NSF (US) [PHY-0919363, PHY-1004072]; DOE (US) [DE-FG02-91ER40671,
DE-AC02-07CH11359]; Istituto Nazionale di Fisica Nucleare (Italy)
FX We acknowledge support from the NSF (US, Grants PHY-0919363,
PHY-1004072, and associated collaborative Grants), DOE (US, Contract
Nos. DE-FG02-91ER40671 and DE-AC02-07CH11359), and the Istituto
Nazionale di Fisica Nucleare (Italy).
NR 26
TC 18
Z9 18
U1 1
U2 22
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-6505
EI 1873-2852
J9 ASTROPART PHYS
JI Astropart Phys.
PD SEP
PY 2013
VL 49
BP 44
EP 51
DI 10.1016/j.astropartphys.2013.08.004
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 239EZ
UT WOS:000326006700005
ER
PT J
AU Aramaki, T
Chan, SK
Craig, WW
Fabris, L
Gahbauer, F
Hailey, CJ
Koglin, JE
Madden, N
Mori, K
Yu, HT
Ziock, KP
AF Aramaki, T.
Chan, S. K.
Craig, W. W.
Fabris, L.
Gahbauer, F.
Hailey, C. J.
Koglin, J. E.
Madden, N.
Mori, K.
Yu, H. T.
Ziock, K. P.
TI A measurement of atomic X-ray yields in exotic atoms and implications
for an antideuteron-based dark matter search
SO ASTROPARTICLE PHYSICS
LA English
DT Article
DE Dark matter; Antiparticle; Antideuteron; Exotic atom; GAPS
ID OPTICAL-MODEL ANALYSIS; CASCADE; ELEMENTS
AB The General AntiParticle Spectrometer (GAPS) is a novel approach for the indirect dark matter search that exploits cosmic antideuterons. GAPS utilizes a distinctive detection method using atomic X-rays and charged particles from the exotic atom as well as the timing, stopping range and dE/dX energy deposit of the incoming particle, which provides excellent antideuteron identification. In anticipation of a future balloon experiment, an accelerator test was conducted in 2004 and 2005 at KEK, Japan, in order to prove the concept and to precisely measure the X-ray yields of antiprotonic exotic atoms formed with different target materials [1]. The X-ray yields of the exotic atoms with Al and S targets were obtained as 75%, which are higher than were previously assumed in [2]. A simple, but comprehensive cascade model has been developed not only to evaluate the measurement results but also to predict the X-ray yields of the exotic atoms formed with any materials in the GAPS instrument. The cascade model is extendable to any kind of exotic atom (any negatively charged cascading particles with any target materials), and it was compared and validated with other experimental data and cascade models for muonic and antiprotonic exotic atoms. The X-ray yields of the antideuteronic exotic atoms are predicted with a simple cascade model and the sensitivity for the GAPS antideuteron search was estimated for the proposed long duration balloon program [3], which suggests that GAPS has a strong potential to detect antideuterons as a dark matter signature. A GAPS prototype flight (pGAPS) was launched successfully from the JAXA/ISAS balloon facility in Hokkaido, Japan in summer 2012 [4,5] and a proposed GAPS science flight is to fly from Antarctica in the austral summer of 2017-2018. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Aramaki, T.; Chan, S. K.; Gahbauer, F.; Hailey, C. J.; Koglin, J. E.; Mori, K.; Yu, H. T.] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA.
[Craig, W. W.; Fabris, L.; Madden, N.; Ziock, K. P.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Aramaki, T (reprint author), Columbia Univ, Columbia Astrophys Lab, 538 W 120th St, New York, NY 10027 USA.
EM tsuguo@astro.columbia.edu
RI Gahbauer, Florian/J-9542-2014; Fabris, Lorenzo/E-4653-2013
OI Gahbauer, Florian/0000-0002-7126-2513; Fabris,
Lorenzo/0000-0001-5605-5615
FU NASA SRT grant [NAG5-5393]
FX We would like to thank J. Collins and the electronics shop staff at LLNL
for the development and construction of the GAPS electronics, and T.
Decker, R. Hill and G. Tajiri for mechanical engineering support. We
would also like to thank T Koike for the helpful discussion on the
cascade model. We gratefully acknowledge the support of M. Ieiri and the
KEK staff, and J. Jou before and during the accelerator experiments.
This work was supported in part by a NASA SR&T grant, NAG5-5393.
NR 29
TC 3
Z9 3
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-6505
EI 1873-2852
J9 ASTROPART PHYS
JI Astropart Phys.
PD SEP
PY 2013
VL 49
BP 52
EP 62
DI 10.1016/j.astropartphys.2013.08.003
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 239EZ
UT WOS:000326006700006
ER
PT J
AU Musselwhite, N
Alayoglu, S
Melaet, G
Pushkarev, VV
Lindeman, AE
An, K
Somorjai, GA
AF Musselwhite, Nathan
Alayoglu, Selim
Melaet, Gerome
Pushkarev, Vladimir V.
Lindeman, Avery E.
An, Kwangjin
Somorjai, Gabor A.
TI Isomerization of n-Hexane Catalyzed by Supported Monodisperse PtRh
Bimetallic Nanoparticles
SO CATALYSIS LETTERS
LA English
DT Article
DE Reforming; Heterogeneous catalysis; Hexane isomerization; PtRh
bimetallic; Ensemble effect; Size effect
AB Composition and size of PtxRh1-x bimetallic nanoparticles were varied in order to study the effects in the catalytic reforming of n-hexane. Hexane isomerization, an analogue to the important industrial process of hydrocarbon reforming is a reaction in which we aim to investigate the molecular level details of catalysis. It is known, that in hydrocarbon isomerization, Pt atoms act to isomerize the reactants, while small amounts of "promoter metal" atoms (such as Rh, Ir, Re and Sn) provide C-C and C-H bond breaking activity. Herein, we report on the effect of composition and size in model bimetallic PtxRh1-x nanoparticle catalysts utilized in n-hexane reforming. Both nanoparticle composition and size were shown to influence catalytic turnover frequency and product selectivity. It was found, through ambient pressure X-ray photoelectron spectroscopy, that the surface of these nanoparticles is both dynamic, and Rh rich under relevant reaction conditions. The findings suggest that an ensemble effect exists, in which the highest isomer production occurs when Rh atoms are surrounded by Pt atoms on the metal surface.
C1 [Musselwhite, Nathan; Alayoglu, Selim; Melaet, Gerome; Lindeman, Avery E.; An, Kwangjin; Somorjai, Gabor A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Musselwhite, Nathan; Alayoglu, Selim; Melaet, Gerome; Pushkarev, Vladimir V.; Lindeman, Avery E.; Somorjai, Gabor A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM somorjai@berkeley.edu
RI Melaet, Gerome/N-4879-2015; Foundry, Molecular/G-9968-2014
OI Melaet, Gerome/0000-0003-1414-1683;
FU Chevron Energy Technology Company; Office of Science, Office of Basic
Energy Sciences, Division of Chemical Sciences, Geological and
Biosciences of the US DOE [DE-AC02-05CH11231]; National Center for
Electron Microscopy, Lawrence Berkeley Lab; U.S. Department of Energy
[DE-AC02-05CH11231]; Office of Science, Office of Basic Energy Sciences,
Division of Material Sciences and Engineering, of the U.S. Department of
Energy [DE-AC02-05CH11231]
FX This work is funded by The Chevron Energy Technology Company. We
acknowledge support from the Director, Office of Science, Office of
Basic Energy Sciences, Division of Chemical Sciences, Geological and
Biosciences of the US DOE under contract DE-AC02-05CH11231. The authors
acknowledge support of the National Center for Electron Microscopy,
Lawrence Berkeley Lab, which is supported by the U.S. Department of
Energy under Contract No. DE-AC02-05CH11231. Work at the Molecular
Foundry was supported by the Director, Office of Science, Office of
Basic Energy Sciences, Division of Material Sciences and Engineering, of
the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
NR 8
TC 8
Z9 8
U1 4
U2 43
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1011-372X
EI 1572-879X
J9 CATAL LETT
JI Catal. Lett.
PD SEP
PY 2013
VL 143
IS 9
BP 907
EP 911
DI 10.1007/s10562-013-1068-5
PG 5
WC Chemistry, Physical
SC Chemistry
GA 235BD
UT WOS:000325688500007
ER
PT J
AU Bauer, JC
Mullins, DR
Oyola, Y
Overbury, SH
Dai, S
AF Bauer, J. Chris
Mullins, David R.
Oyola, Yatsandra
Overbury, Steven H.
Dai, Sheng
TI Structure Activity Relationships of Silica Supported AuCu and AuCuPd
Alloy Catalysts for the Oxidation of CO
SO CATALYSIS LETTERS
LA English
DT Article
DE Heterogeneous catalysis; EXAFS; XRD; Nanoparticles; CO oxidation
ID RAY-ABSORPTION SPECTROSCOPY; GOLD-COPPER NANOPARTICLES; OXYGEN REDUCTION
REACTION; LOW-TEMPERATURE OXIDATION; SOLVENT-FREE OXIDATION;
NANOCRYSTALS; CLUSTERS; SITES; ADSORPTION; KINETICS
AB Supported AuCu and AuCuPd catalysts were synthesized through the diffusion of Pd and Cu into Au nanoparticle seeds. When supported on SiO2, the AuCuPd nanoparticles were found to be the most active for the oxidation of CO after being exposed to reductive pretreatment conditions as opposed to oxidative pretreatment conditions. In contrast, AuCu/SiO2 was found to be more active for CO oxidation after the alloy phase was segregated into a Au-CuOx heterostructure. In situ XRD and EXAFS were used to monitor the structural changes of AuCu and AuCuPd catalysts as they were subjected to different pretreatment conditions.
C1 [Bauer, J. Chris; Mullins, David R.; Oyola, Yatsandra; Overbury, Steven H.; Dai, Sheng] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Overbury, Steven H.; Dai, Sheng] Ctr Nanophase Mat Sci, Oak Ridge, TN USA.
[Dai, Sheng] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
RP Bauer, JC (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM chris.bauer@evonik.com
RI Overbury, Steven/C-5108-2016; Dai, Sheng/K-8411-2015
OI Overbury, Steven/0000-0002-5137-3961; Dai, Sheng/0000-0002-8046-3931
FU Division of Chemical Sciences, Geosciences, and Biosciences, Office of
Basic Energy Sciences, U.S. Department of Energy [DE-AC05-00OR22725];
Oak Ridge National Laboratory; US Department of Energy, Office of
Science, Office of Basic Energy Sciences [DE-AC02-98CH10886];
Synchrotron Catalysis Consortium [DE-FG02-05ER15688]; Scientific User
Facilities Division, U.S. Department of Energy
FX The research was sponsored by the Division of Chemical Sciences,
Geosciences, and Biosciences, Office of Basic Energy Sciences, U.S.
Department of Energy, under Contract No. DE-AC05-00OR22725 with Oak
Ridge National Laboratory managed and operated by UT-Battelle, LLC.
EXAFS experiments were conducted at the National Synchrotron Light
Source, Brookhaven National Laboratory, supported by the US Department
of Energy, Office of Science, Office of Basic Energy Sciences, under
Contract No. DE-AC02-98CH10886 with additional support through the
Synchrotron Catalysis Consortium under grant DE-FG02-05ER15688. A
portion of this research was conducted at the Center for Nanophase
Materials Sciences, which is sponsored at Oak Ridge National Laboratory
by the Scientific User Facilities Division, U.S. Department of Energy.
NR 40
TC 8
Z9 8
U1 4
U2 86
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1011-372X
EI 1572-879X
J9 CATAL LETT
JI Catal. Lett.
PD SEP
PY 2013
VL 143
IS 9
BP 926
EP 935
DI 10.1007/s10562-013-1075-6
PG 10
WC Chemistry, Physical
SC Chemistry
GA 235BD
UT WOS:000325688500010
ER
PT J
AU Giani, A
Bitar, E
Garcia, M
McQueen, M
Khargonekar, P
Poolla, K
AF Giani, Annarita
Bitar, Eilyan
Garcia, Manuel
McQueen, Miles
Khargonekar, Pramod
Poolla, Kameshwar
TI Smart Grid Data Integrity Attacks
SO IEEE TRANSACTIONS ON SMART GRID
LA English
DT Article
DE Cybersecurity; integrity attacks; observability; smart grid;
synchro-phasors
ID BAD DATA DETECTION; STATE ESTIMATION; IDENTIFICATION; OBSERVABILITY;
ALGORITHMS; PLACEMENT; SECURITY
AB Real power injections at loads and generators, and real power flows on selected lines in a transmission network are monitored and transmitted over a SCADA network to the system operator. These are used in state estimation algorithms to make dispatch, re-balance and other energy management system [EMS] decisions. Coordinated cyber attacks on power meter readings can be designed to be undetectable by any bad data detection algorithm. These unobservable attacks present a serious threat to grid operations. Of particular interest are sparse attacks that involve the compromise of a modest number of meter readings. An efficient algorithm to find all unobservable attacks [under standard DC load flow approximations] involving the compromise of exactly two power injection meters and an arbitrary number of power meters on lines is presented. This requires O(n(2)m) flops for a power system with buses and line meters. If all lines are metered, there exist canonical forms that characterize all 3, 4, and 5-sparse unobservable attacks. These can be quickly detected with O(n(2)) flops using standard graph algorithms. Known-secure phasor measurement units [PMUs] can be used as countermeasures against a given collection of cyber attacks. Finding the minimum number of necessary PMUs is NP-hard. It is shown that p + 1 PMUs at carefully chosen buses are sufficient to neutralize a collection of cyber attacks.
C1 [Giani, Annarita] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Bitar, Eilyan] Cornell Univ, Sch Elect & Comp Engn, Ithaca, NY 14850 USA.
[Garcia, Manuel] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA.
[McQueen, Miles] Idaho Natl Lab, Idaho Falls, ID 83401 USA.
[Khargonekar, Pramod] Univ Florida, Dept Elect Engn, Gainesville, FL 32611 USA.
[Poolla, Kameshwar] Univ Calif Berkeley, Dept Elect & Comp Engn, Berkeley, CA 94720 USA.
RP Giani, A (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
OI Khargonekar, Pramod/0000-0001-6634-6950
FU EPRI; CERTS [09-206]; PSERC [S-52]; NSF [EECS-1129061/9001, CPS-1239178,
CNS-1239274/9467/9178]; Republic of Singapores National Research
Foundation; Florida Energy Systems Consortium; University of Florida;
Robert Bosch LLC through Bosch Energy Research Network funding program;
U.S. Department of Energy through INL/LANL/LDRD/CNLS
FX This work was supported in part by EPRI and CERTS under sub-award
09-206; PSERC S-52, in part by the NSF under Grants EECS-1129061/9001,
CPS-1239178, and CNS-1239274/9467/9178, in part by the Republic of
Singapores National Research Foundation through a grant to the Berkeley
Education Alliance for Research in Singapore for the SinBerBEST Program,
in part by the Florida Energy Systems Consortium, the Eckis Professor
endowment at the University of Florida, in part by Robert Bosch LLC
through its Bosch Energy Research Network funding program, and in part
by the U.S. Department of Energy through the INL/LANL/LDRD/CNLS
Programs.
NR 35
TC 37
Z9 39
U1 1
U2 33
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1949-3053
J9 IEEE T SMART GRID
JI IEEE Trans. Smart Grid
PD SEP
PY 2013
VL 4
IS 3
BP 1244
EP 1253
DI 10.1109/TSG.2013.2245155
PG 10
WC Engineering, Electrical & Electronic
SC Engineering
GA 232IX
UT WOS:000325488200003
ER
PT J
AU Chen, C
Wang, JH
Heo, Y
Kishore, S
AF Chen, Chen
Wang, Jianhui
Heo, Yeonsook
Kishore, Shalinee
TI MPC-Based Appliance Scheduling for Residential Building Energy
Management Controller
SO IEEE TRANSACTIONS ON SMART GRID
LA English
DT Article
DE Building; energy management controller; MPC; optimization
ID MODELS; ARIMA
AB This paper proposes an appliance scheduling scheme for residential building energy management controllers, by taking advantage of the time-varying retail pricing enabled by the two-way communication infrastructure of the smart grid. Finite-horizon scheduling optimization problems are formulated to exploit operational flexibilities of thermal and non-thermal appliances using a model predictive control (MPC) method which incorporates both forecasts and newly updated information. For thermal appliance scheduling, the thermal mass of the building, which serves as thermal storage, is integrated into the optimization problem by modeling the thermodynamics of rooms in a building as constraints. Within the comfort range modeled by the predicted mean vote (PMV) index, thermal appliances are scheduled smartly together with thermal mass storage to hedge against high prices and make use of low-price time periods. For non-thermal appliance scheduling, in which delay and/or power consumption flexibilities are available, operation dependence of inter-appliance and intra-appliance is modeled to further exploit the price variation. Simulation results show that customers have notable energy cost savings on their electricity bills with time-varying pricing. The impact of customers' preferences of appliances usage on energy cost savings is also evaluated.
C1 [Chen, Chen; Kishore, Shalinee] Lehigh Univ, Dept Elect & Comp Engn, Bethlehem, PA 18015 USA.
[Wang, Jianhui; Heo, Yeonsook] Argonne Natl Lab, Decis & Informat Sci Div, Argonne, IL 60439 USA.
RP Chen, C (reprint author), Lehigh Univ, Dept Elect & Comp Engn, Bethlehem, PA 18015 USA.
EM cchen@lehigh.edu; jianhui.wang@anl.gov; yheo@anl.gov;
skishore@lehigh.edu
FU [DE-AC02-06CH11357]
FX The submitted manuscript has been created by UChicago Argonne, LLC,
Operator of Argonne National Laboratory (Argonne). Argonne, a U.S.
Department of Energy Office of Science laboratory, is operated under
Contract No. DE-AC02-06CH11357.
NR 24
TC 46
Z9 48
U1 5
U2 22
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1949-3053
J9 IEEE T SMART GRID
JI IEEE Trans. Smart Grid
PD SEP
PY 2013
VL 4
IS 3
BP 1401
EP 1410
DI 10.1109/TSG.2013.2265239
PG 10
WC Engineering, Electrical & Electronic
SC Engineering
GA 232IX
UT WOS:000325488200020
ER
PT J
AU Bulaevskii, LN
Lin, SZ
AF Bulaevskii, L. N.
Lin, S. -Z.
TI Polaron-like vortices, dissociation transition, and self-induced pinning
in magnetic superconductors
SO JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
LA English
DT Article
ID MANGANESE ALLOYS; VORTEX LATTICE; SPIN-GLASSES; ERNI2B2C; STATE;
COEXISTENCE; CHAIN; BOROCARBIDES; ANISOTROPY; COMPOUND
AB Vortices in magnetic superconductors polarize spins nonuniformly and repolarize them when moving. At a low spin relaxation rate and at low bias currents, vortices carrying magnetic polarization clouds become polaron-like and their velocities are determined by the effective drag coefficient that is significantly bigger than the Bardeen-Stephen (BS) one. As the current increases, vortices release polarization clouds and the velocity as well as the voltage in the I-V characteristics jump to values corresponding to the BS drag coefficient at a critical current J (c) . The nonuniform components of the magnetic field and magnetization drop as the velocity increases, resulting in weaker polarization and a discontinuous dynamic dissociation depinning transition. Experimentally, the jump shows up as a depinning transition and the corresponding current at the jump is the depinning current. As the current decreases, on the way back, vortices are retrapped by polarization clouds at the current J (r) < J (c) . As a result, the polaronic effect suppresses dissipation and enhances the critical current. Borocarbides (RE)Ni2B2C with a short penetration length and highly polarizable rare earth spins seem to be optimal systems for a detailed study of vortex polaron formation by measuring I-V characteristics. We also propose to use a superconductor-magnet multilayer structure to study polaronic mechanism of pinning with the goal to achieve high critical currents. The magnetic layers should have large magnetic susceptibility to enhance the coupling between vortices and magnetization in magnetic layers while the relaxation of the magnetization should be slow. For Nb and a proper magnet multilayer structure, we estimate the critical current density J (c) similar to 10(9) A/m(2) at the magnetic field B a parts per thousand 1 T.
C1 [Bulaevskii, L. N.; Lin, S. -Z.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Bulaevskii, LN (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM lnb@lanl.gov
RI Lin, Shi-Zeng/B-2906-2008
OI Lin, Shi-Zeng/0000-0002-4368-5244
FU Los Alamos Laboratory Directed Research and Development Program
[20110138ER]
FX The authors thank P. Canfield, C. D. Batista, V. Kogan, V. Vinokur, D.
Smith, A. Saxena, L. Civale, and B. Maiorov for the helpful discussions.
This publication was made possible by funding from the Los Alamos
Laboratory Directed Research and Development Program, project number
20110138ER.
NR 47
TC 0
Z9 0
U1 2
U2 7
PU MAIK NAUKA/INTERPERIODICA/SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA
SN 1063-7761
EI 1090-6509
J9 J EXP THEOR PHYS+
JI J. Exp. Theor. Phys.
PD SEP
PY 2013
VL 117
IS 3
BP 407
EP 417
DI 10.1134/S1063776113110071
PG 11
WC Physics, Multidisciplinary
SC Physics
GA 235HZ
UT WOS:000325709500004
ER
PT J
AU Koshelev, AE
Dodgson, MJW
AF Koshelev, A. E.
Dodgson, M. J. W.
TI Josephson vortex lattice in layered superconductors
SO JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
LA English
DT Article
ID PARALLEL MAGNETIC-FIELDS; HIGH-TC SUPERCONDUCTORS; O COMPOUND SYSTEM;
SINGLE-CRYSTALS; ANISOTROPIC SUPERCONDUCTORS; FLUX LATTICES; TRANSITION;
VORTICES; PHASE; OSCILLATIONS
AB Many superconducting materials are composed of weakly coupled conducting layers. Such a layered structure has a very strong influence on the properties of vortex matter in a magnetic field. This review focuses on the properties of the Josephson vortex lattice generated by the magnetic field applied in the direction of the layers. The theoretical description is based on the Lawrence-Doniach model in the London limit, which takes only the phase degree of freedom of the superconducting order parameter into account. In spite of its simplicity, this model leads to an amazingly rich set of phenomena. We review in detail the structure of an isolated vortex line and various properties of the vortex lattice, in both dilute and dense limits. In particular, we extensively discuss the influence of the layered structure and thermal fluctuations on the selection of lattice configurations at different magnetic fields.
C1 [Koshelev, A. E.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Dodgson, M. J. W.] Cavendish Lab, Condensed Matter Theory Grp, Cambridge CB3 OHE, England.
Univ Neuchatel, Inst Phys, CH-2000 Neuchatel, Switzerland.
UCL, Dept Phys & Astron, London WC1E 6BT, England.
RP Koshelev, AE (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM koshelev@anl.gov
RI Koshelev, Alexei/K-3971-2013
OI Koshelev, Alexei/0000-0002-1167-5906
FU UChicago Argonne, LLC, operator of Argonne National Laboratory, a U.S.
Department of Energy Office of Science laboratory [DE-AC02-06CH11357]
FX A. E. K. would like to thank L. N. Bulaevskii, M. Tachiki, and X. Hu for
many useful discussions of theoretical issues and Yu. I. Latyshev, I.
Kakeya, T. Hatano, S. Bending, V. K. Vlasko-Vlasov, A. Tonomura, and A.
A. Zhukov for the discussions of relevant experimental data. A. E. K. is
supported by UChicago Argonne, LLC, operator of Argonne National
Laboratory, a U.S. Department of Energy Office of Science laboratory,
operated under contract No. DE-AC02-06CH11357.
NR 82
TC 4
Z9 4
U1 0
U2 14
PU MAIK NAUKA/INTERPERIODICA/SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA
SN 1063-7761
EI 1090-6509
J9 J EXP THEOR PHYS+
JI J. Exp. Theor. Phys.
PD SEP
PY 2013
VL 117
IS 3
BP 449
EP 479
DI 10.1134/S1063776113110125
PG 31
WC Physics, Multidisciplinary
SC Physics
GA 235HZ
UT WOS:000325709500007
ER
PT J
AU Matveev, KA
AF Matveev, K. A.
TI Equilibration of a one-dimensional quantum liquid
SO JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
LA English
DT Article
ID MANY-FERMION SYSTEM; LUTTINGER-LIQUID; ELECTRON-GAS; QUANTIZED
CONDUCTANCE; POINT CONTACTS; MODEL; TRANSPORT; 1D
AB We review some of the recent results on equilibration of one-dimensional quantum liquids. The low-energy properties of these systems are described by the Luttinger liquid theory, in which the excitations are bosonic quasiparticles. At low temperatures, the relaxation of the gas of excitations toward full equilibrium is exponentially slow. In electronic Luttinger liquids, these relaxation processes involve backscattering of electrons and give rise to interesting corrections to the transport properties of one-dimensional conductors. We focus on the phenomenological theory of the equilibration of a quantum liquid and obtain an expression for the relaxation rate in terms of the excitation spectrum.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Matveev, KA (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM matveev@anl.gov
FU UChicago Argonne, LLC [DE-AC02-06CH11357]
FX The author is grateful to A. V. Andreev and A. Furusaki for discussions
and to RIKEN for kind hospitality. This work was supported by UChicago
Argonne, LLC, under contract No. DE-AC02-06CH11357.
NR 45
TC 5
Z9 5
U1 0
U2 3
PU MAIK NAUKA/INTERPERIODICA/SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA
SN 1063-7761
EI 1090-6509
J9 J EXP THEOR PHYS+
JI J. Exp. Theor. Phys.
PD SEP
PY 2013
VL 117
IS 3
BP 508
EP 516
DI 10.1134/S1063776113110137
PG 9
WC Physics, Multidisciplinary
SC Physics
GA 235HZ
UT WOS:000325709500011
ER
PT J
AU Birn, J
Nakamura, R
Hesse, M
AF Birn, J.
Nakamura, R.
Hesse, M.
TI On the propagation of blobs in the magnetotail: MHD simulations
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE blobs; entropy enhancement; magnetotail dynamics
ID BURSTY BULK FLOWS; CENTRAL PLASMA SHEET; AURORAL STREAMERS; MAGNETIC
RECONNECTION; THERMAL CATASTROPHE; FLUX TUBES; SUBSTORMS; TAIL;
INTENSIFICATIONS; INSTABILITY
AB Using three-dimensional magnetohydrodynamic (MHD) simulations of the magnetotail, we investigate the fate of entropy-enhanced localized magnetic flux tubes (blobs). Such flux tubes may be the result of a slippage process that also generates entropy-depleted flux tubes (bubbles) or of a rapid localized energy increase, for instance, from wave absorption. We confirm the expectation that the entropy enhancement leads to a tailward motion and that the speed and distance traveled into the tail increase with the entropy enhancement, even though the blobs tend to break up into pieces. The vorticity on the outside of the blobs twists the magnetic field and generates field-aligned currents predominantly of region-2 sense (earthward on the dusk side and tailward on the dawn side), which might provide a possibility for remote identification from the ground. The breakup, however, leads to more turbulent flow patterns, associated with opposite vorticity and the generation of region-1 sense field-aligned currents of lower intensity but approximately equal integrated magnitude.
C1 [Birn, J.] Space Sci Inst, Boulder, CO 80301 USA.
[Birn, J.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Nakamura, R.] Austrian Acad Sci, Space Res Inst, A-8010 Graz, Austria.
[Hesse, M.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Birn, J (reprint author), Space Sci Inst, 4750 Walnut St,Suite 205, Boulder, CO 80301 USA.
EM jbirn@lanl.gov
RI Nakamura, Rumi/I-7712-2013; feggans, john/F-5370-2012; NASA MMS, Science
Team/J-5393-2013
OI Nakamura, Rumi/0000-0002-2620-9211; NASA MMS, Science
Team/0000-0002-9504-5214
FU US Department of Energy Los Alamos; NSF at Los Alamos; NASA at Los
Alamos
FX This work was performed mainly at Los Alamos under the auspices of the
US Department of Energy, supported by NSF's GEM and NASA's MMS/SMART
Theory and Modeling and SR&T Programs. We thank both referees for
stimulating "minor" comments and questions.
NR 39
TC 4
Z9 4
U1 0
U2 10
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD SEP
PY 2013
VL 118
IS 9
BP 5497
EP 5505
DI 10.1002/jgra.50521
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 232HN
UT WOS:000325483800010
ER
PT J
AU Yu, YQ
Ridley, AJ
AF Yu, Yiqun
Ridley, Aaron J.
TI Exploring the influence of ionospheric O+ outflow on magnetospheric
dynamics: The effect of outflow intensity
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE ionospheric outflow; Kelvin Helmholtz instability; magnetospheric
dynamics; solar wind-magnetosphere coupling
ID KELVIN-HELMHOLTZ VORTICES; SOLAR-WIND; ART.; MAGNETOPAUSE; DEPENDENCE;
TRANSPORT; SHEET; MODEL; IONS; CODE
AB The ionospheric O+ outflow varies dramatically during geomagnetic activities, but the influence of its initial characteristics on the magnetospheric dynamics has not been well established. To expand a previous study on the impact of ionospheric heavy ions outflow originating from different source regions on the magnetotail dynamics and dayside reconnection rate, this study conducts two idealized numerical experiments with different O+ outflow densities to examine the consequent change in the magnetosphere system, especially on the solar wind-magnetosphere coupling efficiency. Results indicate that a larger O+ outflow is capable of triggering the Kelvin-Helmholtz instability (KHI) on the magnetopause flanks. The subsequent surface waves enhance the solar wind-magnetosphere coupling efficiency by transmitting more solar wind energy into the magnetosphere-ionosphere system, increasing the cross polar cap potential index. This index is initially reduced after the ionospheric mass loading owing to the direct depression in the dayside reconnection rate as commonly reported from earlier literature. The above KHI is generated under steady state solar wind conditions, suggesting that besides the commonly recognized cause, the elevated solar wind speed, ionospheric heavy ions outflow is another potential factor in disturbing the boundary by enhancing the mass density near the magnetopause and thus lowering the threshold for generating KHI. During storms, the increased ionospheric mass source causes an increased probability of KHI, which allows more solar wind plasma into the magnetosphere. This implies there is a possibility of even further nonlinear coupling between the magnetosphere and solar wind.
C1 [Yu, Yiqun] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Ridley, Aaron J.] Univ Michigan, Ctr Space Environm Modeling, Ann Arbor, MI 48109 USA.
RP Yu, YQ (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM yiqun@lanl.gov
RI Yu, Yiqun/E-2710-2012; Ridley, Aaron/F-3943-2011
OI Yu, Yiqun/0000-0002-1013-6505; Ridley, Aaron/0000-0001-6933-8534
FU NSF at UM [ATM0639336, ANT0838828]; DoD [FA95550-07-1-0434]; U. S.
Department of Energy through the Los Alamos National
Laboratory/Laboratory Directed Research and Development (LDRD) program
at LANL
FX The work at UM was supported by NSF ATM0639336, ANT0838828, and DoD
FA95550-07-1-0434, and the work at LANL was supported by the U. S.
Department of Energy through the Los Alamos National
Laboratory/Laboratory Directed Research and Development (LDRD) program.
NR 44
TC 8
Z9 8
U1 2
U2 7
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD SEP
PY 2013
VL 118
IS 9
BP 5522
EP 5531
DI 10.1002/jgra.50528
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 232HN
UT WOS:000325483800012
ER
PT J
AU Borovsky, JE
Denton, MH
Denton, RE
Jordanova, VK
Krall, J
AF Borovsky, Joseph E.
Denton, Michael H.
Denton, Richard E.
Jordanova, Vania K.
Krall, Jonathan
TI Estimating the effects of ionospheric plasma on solar wind/magnetosphere
coupling via mass loading of dayside reconnection: Ion-plasma-sheet
oxygen, plasmaspheric drainage plumes, and the plasma cloak
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE reconnection; plasmasphere; plasma sheet; cloak; solar-wind;
magnetosphere coupling
ID COORDINATED MODELING CENTER; GEOSYNCHRONOUS ORBIT; MAGNETIC
RECONNECTION; RING CURRENT; GEOMAGNETIC STORMS; LATITUDE IONOSPHERE;
AURORAL IONOSPHERE; OUTER PLASMASPHERE; THERMAL PLASMA; DRIVEN STORMS
AB Estimates are calculated for the storm time reduction of solar wind/magnetosphere coupling by the mass density (m) of the magnetospheric plasma. Based on the application of the Cassak-Shay reconnection-rate formula at the dayside magnetopause, a numerical factor M is developed to quantify the effect of (m) on the dayside reconnection rate. It is argued that the mass loading of dayside reconnection by (m) also makes reconnection more susceptible to shutoff by magnetosheath velocity shear: a formula is developed to estimate the shortening of the dayside reconnection X-line by (m). Surveys of plasmaspheric drainage plumes at geosynchronous orbit during high-speed-stream-driven storms and coronal mass ejection (CME)-driven storms are presented: in the surveys the CME-driven storms are separated into sheath-driven portions and magnetic-cloud-driven portions. The storm time mass density of the warm plasma cloak (ionospheric outflows into the electron plasma sheet) is obtained from Alfven-wave analysis at geosynchronous orbit. A methodology is developed to extrapolate geosynchronous-orbit plasma measurements to the dayside magnetopause. For each of the three plasmas, estimates of the fractional reduction of the total dayside reconnection rate vary, with typical values of tens of percent; i.e., solar wind/magnetosphere coupling is reduced by tens of percent during storms by oxygen in the ion plasma sheet, by the plasmaspheric drainage plume, and by the plasma cloak. Dependence of the reduction on the F-10.7 solar radio flux is anticipated. Via these ionospheric-origin plasmas, the magnetosphere can exert some control over solar wind/magnetosphere coupling. Pathways to gain a fuller understanding of the physics of the solar wind-driven magnetosphere-ionosphere system are discussed.
C1 [Borovsky, Joseph E.; Denton, Michael H.] Space Sci Inst, Boulder, CO 80301 USA.
[Borovsky, Joseph E.] Univ Michigan, AOSS, Ann Arbor, MI 48109 USA.
[Borovsky, Joseph E.; Denton, Michael H.] Univ Lancaster, Dept Phys, Lancaster, England.
[Denton, Richard E.] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA.
[Jordanova, Vania K.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Krall, Jonathan] Naval Res Lab, Washington, DC USA.
RP Borovsky, JE (reprint author), Space Sci Inst, Boulder, CO 80301 USA.
EM jborovsky@spacescience.org
OI Denton, Michael/0000-0002-1748-3710; Jordanova,
Vania/0000-0003-0475-8743
FU Space Science Institute by the NSF GEM Program; NASA CCMSM-24 Program;
University of Michigan by the NASA Geospace SRT Program; NASA LWS TRT
program; NASA Heliophysics Theory Program [NNX11AO59G]
FX The authors wish to thank Joachim Birn, Paul Cassak, Benoit Lavraud,
John Lyon, Antonius Otto, Lutz Rastatter, and Michelle Thomsen for their
help and to thank Kazue Takahashi for the codevelopment of the GOES
density data set. Global-MHD simulations were performed at the CCMC.
This work was supported at Space Science Institute by the NSF GEM
Program and the NASA CCMSM-24 Program and supported at the University of
Michigan by the NASA Geospace SR&T Program. Work at Dartmouth College,
Los Alamos National Laboratory, and Naval Research Laboratory was
supported by the NASA LWS TR&T program. Work at Dartmouth College was
also supported by the NASA Heliophysics Theory Program NNX11AO59G.
NR 100
TC 18
Z9 18
U1 1
U2 12
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD SEP
PY 2013
VL 118
IS 9
BP 5695
EP 5719
DI 10.1002/jgra.50527
PG 25
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 232HN
UT WOS:000325483800026
ER
PT J
AU Nakamura, TKM
Daughton, W
Karimabadi, H
Eriksson, S
AF Nakamura, T. K. M.
Daughton, W.
Karimabadi, H.
Eriksson, S.
TI Three-dimensional dynamics of vortex-induced reconnection and comparison
with THEMIS observations
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE Kelvin-Helmholtz; magnetic reconnection; flux rope; kinetic simulation;
three-dimensionality; THEMIS
ID KELVIN-HELMHOLTZ INSTABILITY; LATITUDE BOUNDARY-LAYER; FLUX-TRANSFER
EVENTS; MAGNETIC RECONNECTION; GEOTAIL OBSERVATIONS; MAGNETOSPHERIC
BOUNDARY; COLLISIONLESS PLASMAS; MAGNETOTAIL BOUNDARY; MAGNETOPAUSE;
SIMULATIONS
AB The entry of solar wind into the magnetosphere is strongly influenced by kinetic-scale boundary layers where the rapid variation in the magnetic field and/or velocity can drive transport. In current layers with strong Alfvenic velocity shear, the generation of vortices from the Kelvin-Helmholtz instability can drive magnetic reconnection even in broader current sheets by locally compressing these layers as the vortices develop. Previous two-dimensional (2-D) fully kinetic simulations of this vortex-induced reconnection process have demonstrated the copious formation of magnetic islands in regions of strongly compressed current between the vortices. Here we describe the first three-dimensional (3-D) fully kinetic simulations of this process and demonstrate that the compressed current sheets give rise to magnetic flux ropes over a range of oblique angles and along the entire extent of the compressed current layer around the periphery of the vortex. These flux ropes propagate with the shear flow and eventually merge with the vortex. Over longer time scales, this basic scenario is repeated as the vortices drive new compressed current sheets. In the final stage, the vortices undergo a merging process that drives new compressed current sheets and flux ropes. Based on these simulations, a simple model is proposed that predicts the size of these flux ropes relative to their parent vortex. Both the relative sizes as well as the structure of the profiles across the vortex are in reasonable agreement with Time History of Events and Macroscale Interactions (THEMIS) observations at the Earth's low-latitude magnetopause.
C1 [Nakamura, T. K. M.; Daughton, W.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Karimabadi, H.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Karimabadi, H.] SciberQuest Inc, Del Mar, CA USA.
[Eriksson, S.] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA.
RP Nakamura, TKM (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM takuma@lanl.gov
RI Daughton, William/L-9661-2013;
OI Eriksson, Stefan/0000-0002-5619-1577
FU DOE through the LDRD program at LANL; DOE through the LDRD program at
UCSD [DE-SC0004662]; NASA through the Heliophysics Theory and Geospace
Science Programs; DOE [DE-AC05-00OR22725]; NASA at the University of
Colorado at Boulder [NNX10AQ45G]
FX We thank Dan Winske for fruitful discussions and valuable comments. We
are grateful for the support from DOE through the LDRD program at LANL,
and DE-SC0004662 grant at UCSD, and from NASA through the Heliophysics
Theory and Geospace Science Programs. Simulations were performed on
Jaguar at the National Center for Computational Sciences at ORNL, which
is supported by DOE under contract DE-AC05-00OR22725 and with resources
from the LANL institutional computing program. Some of the visualization
and analysis were performed on Nautilus and Longhorn systems using
ParaView and visualization software developed by the NICS RDAV group. We
especially thank B. Loring for his help with visualization. Work by S.
E. was supported by NASA grant NNX10AQ45G at the University of Colorado
at Boulder.
NR 54
TC 23
Z9 24
U1 2
U2 15
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD SEP
PY 2013
VL 118
IS 9
BP 5742
EP 5757
DI 10.1002/jgra.50547
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 232HN
UT WOS:000325483800029
ER
PT J
AU Thomsen, MF
Wilson, RJ
Tokar, RL
Reisenfeld, DB
Jackman, CM
AF Thomsen, M. F.
Wilson, R. J.
Tokar, R. L.
Reisenfeld, D. B.
Jackman, C. M.
TI Cassini/CAPS observations of duskside tail dynamics at Saturn
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
DE Saturn; magnetosphere
ID PLASMA SHEET BOUNDARY; JOVIAN MAGNETOSPHERE; ION; JUPITERS; FLOWS
AB Plasma properties of Saturn's premidnight tail region are surveyed using Cassini/Cassini Plasma Spectrometer (CAPS) ion observations from 2010. Only low-latitude (|lat|<6 degrees) intervals in which the CAPS viewing was roughly symmetric inward and outward around the corotation direction are used. Our numerical moments algorithm returns nonzero ion density for 70% (999) of the intervals selected. Of these, 642 had detectable water-group ion densities, and the remainder were dominantly, if not entirely, light ions. The derived plasma parameters are similar to those found in an earlier study for the postmidnight tail region, except that we find little evidence for the systematic outflows identified in that study, and we do find numerous significant inflow events. One such inflow is identified as a dipolarization event, the first reported plasma properties of such a structure at Saturn. A second, long-lasting event may be evidence for the existence at times of a quasi-steady reconnection region in the premidnight tail. The large majority of the plasma flows are found to be within 20 degrees of the corotation direction, though with flow speeds significantly lower than full corotation. While the inflow events represent plausible evidence for internally driven mass loss in the premidnight region, the absence of significant outflow events suggests that in the region surveyed here, tail reconnection has not yet proceeded to involve lobe field lines, so the disconnected plasma continues its general motion in the corotation direction.
C1 [Thomsen, M. F.; Tokar, R. L.] Planetary Sci Inst, Tucson, AZ USA.
[Thomsen, M. F.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Wilson, R. J.] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA.
[Reisenfeld, D. B.] Univ Montana, Missoula, MT 59812 USA.
[Jackman, C. M.] UCL, Dept Phys & Astron, London, England.
[Jackman, C. M.] UCL Birkbeck, Ctr Planetary Sci, London, England.
RP Thomsen, MF (reprint author), Los Alamos Natl Lab, MS D466, Los Alamos, NM 87545 USA.
EM mthomsen@lanl.gov
RI Wilson, Rob/C-2689-2009; Reisenfeld, Daniel/F-7614-2015;
OI Wilson, Rob/0000-0001-9276-2368; Jackman, Caitriona/0000-0003-0635-7361
FU NASA Cassini program through JPL [1243218]; Southwest Research
Institute; Royal Astronomical Society
FX MFT and RLT appreciate the support they have received as guest
scientists at Los Alamos National Laboratory. We are also grateful to
Dot Delapp for producing the CAPS moments and viewing survey tools used
in this study. Cassini MAG data used in Figures 9 and 10 were provided
by the Planetary Data System (pds.nasa.gov). This work was supported by
the NASA Cassini program through JPL contract 1243218 with Southwest
Research Institute. The Cassini project is managed by the Jet Propulsion
Laboratory for NASA. CMJ was supported by a Royal Astronomical Society
Fellowship.
NR 41
TC 22
Z9 22
U1 0
U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD SEP
PY 2013
VL 118
IS 9
BP 5767
EP 5781
DI 10.1002/jgra.50552
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 232HN
UT WOS:000325483800031
ER
PT J
AU Colestock, PL
Close, S
AF Colestock, P. L.
Close, S.
TI Reply to comment by I. Katz on "Electromagnetic pulses generated by
meteoroid impacts on spacecraft"
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Editorial Material
DE meteoroid; electromagnetic pulse
ID COLLISIONLESS PLASMA; TAYLOR INSTABILITY; EXPANSION; VACUUM
C1 [Colestock, P. L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Close, S.] Stanford Univ, Dept Aeronaut & Astron, Stanford, CA 94305 USA.
RP Colestock, PL (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM colestock@lanl.gov
NR 8
TC 0
Z9 0
U1 1
U2 2
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD SEP
PY 2013
VL 118
IS 9
BP 5806
EP 5806
DI 10.1002/jgra.50535
PG 1
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 232HN
UT WOS:000325483800036
ER
PT J
AU Blair, MW
Muenchausen, RE
Bennett, BL
Smith, NA
Warner, MG
AF Blair, Michael W.
Muenchausen, Ross E.
Bennett, Bryan L.
Smith, Nickolaus A.
Warner, Marvin G.
TI Correlated spin systems in undoped CdSe quantum dots
SO JOURNAL OF NANOPARTICLE RESEARCH
LA English
DT Article
DE EPR spectroscopy; Quantum dots; Electronic structure; Impurities
ID DETECTED MAGNETIC-RESONANCE; ELECTRON-PARAMAGNETIC-RESONANCE; FLIP
RAMAN-SCATTERING; SEMICONDUCTOR NANOCRYSTALS; LATTICE OSCILLATORS;
SINGLE-ELECTRON; RELAXATION; YBRH2SI2; EXCHANGE; METALS
AB The electronic properties of quantum dots have been studied extensively, and recent studies have explored various dopants that can alter electronic properties in quantum dots. Yet, we have found that impurities on the surface of nanometer-scale CdSe materials can also affect electronic properties. Specifically, nitrogen-based impurities on the surface of nanometer-scale CdSe materials (from similar to 4 to 15 nm) interact with the CdSe conduction electrons to yield an anti-ferromagnetic EPR signal at a high resonance field (g similar to 0.56) that has an inverse Dysonian line-shape. However, bulk CdSe particles do not show the same types of EPR signals. This paper will discuss these observations, explain the underlying phenomena, and discuss implications for future research.
C1 [Blair, Michael W.; Muenchausen, Ross E.; Bennett, Bryan L.; Smith, Nickolaus A.] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87544 USA.
[Warner, Marvin G.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Blair, MW (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, POB 1663,MS E549, Los Alamos, NM 87544 USA.
EM mblair@lanl.gov
FU Basic Energy Sciences of the Office of science under FWP [06SCP1000]
FX The Los Alamos authors would like to acknowledge funding from Basic
Energy Sciences of the Office of science under FWP 06SCP1000.
NR 56
TC 2
Z9 2
U1 0
U2 9
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1388-0764
EI 1572-896X
J9 J NANOPART RES
JI J. Nanopart. Res.
PD SEP
PY 2013
VL 15
IS 9
AR 1953
DI 10.1007/s11051-013-1953-2
PG 11
WC Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials
Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 217PA
UT WOS:000324370200077
ER
PT J
AU Mhin, S
Cozzan, C
Nittala, K
Wanninkhof, P
Ihlefeld, JF
Brennecka, GL
Jones, JL
AF Mhin, Sungwook
Cozzan, Clayton
Nittala, Krishna
Wanninkhof, Patrick
Ihlefeld, Jon F.
Brennecka, Geoff L.
Jones, Jacob L.
TI Effect of Switching Atmospheric Conditions during Crystallization on the
Phase Evolution of Solution-Derived Lead Zirconate Titanate Thin Films
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID TIME TEXTURE TRANSITION; FLUORITE
AB The crystallization behavior of solution-derived lead zirconate titanate (PZT) thin films in different atmospheric environments was studied using in situ X-ray diffraction. The stability of the transient intermetallic Pt3Pb phase and perovskite PZT is dependent on oxygen partial pressure during crystallization. Based on the relationship between oxygen partial pressure and the resultant phase stability of intermediate phases, a new route to produce PZT thin films was developed. The new route involves switching atmospheres during crystallization and is shown to mitigate the formation of the transient intermetallic Pt3Pb phase and to promote the perovskite PZT phase. The route evidences a new and significant variable controlling film synthesis and film microstructure.
C1 [Mhin, Sungwook; Cozzan, Clayton; Nittala, Krishna; Wanninkhof, Patrick; Jones, Jacob L.] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA.
[Ihlefeld, Jon F.; Brennecka, Geoff L.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Jones, JL (reprint author), Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA.
EM Jacob_Jones@ncsu.edu
RI Ihlefeld, Jon/B-3117-2009; Brennecka, Geoff/J-9367-2012;
OI Brennecka, Geoff/0000-0002-4476-7655; Cozzan,
Clayton/0000-0003-3409-0377
FU NSF [DMR-1207293]; U.S. Department of the Army [W911NF-09-1-0435];
UF-Science for Life undergraduate award; U.S. Department of Energy's
National Nuclear Security Administration [DE-AC04-94AL85000]
FX This work is supported by NSF under DMR-1207293, the U.S. Department of
the Army under W911NF-09-1-0435, and a UF-Science for Life undergraduate
award. Sandia National Laboratories is a multiprogram laboratory managed
and operated by Sandia Corporation, a wholly owned subsidiary of
Lockheed Martin Corporation, for the U.S. Department of Energy's
National Nuclear Security Administration under contract
DE-AC04-94AL85000.
NR 15
TC 6
Z9 6
U1 0
U2 16
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0002-7820
EI 1551-2916
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD SEP
PY 2013
VL 96
IS 9
BP 2706
EP 2709
DI 10.1111/jace.12522
PG 4
WC Materials Science, Ceramics
SC Materials Science
GA 238GM
UT WOS:000325932000006
ER
PT J
AU Gharagozloo, PE
Kanouff, MP
AF Gharagozloo, Patricia E.
Kanouff, Michael P.
TI Ionic Diffusion Oxidation Model of Uranium
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID PROTECTIVE OXIDE-FILMS; OXYGEN DIFFUSION; CHEMICAL DIFFUSION;
ELECTRON-AFFINITY; DIOXIDE; KINETICS; UO2; METALS; TEMPERATURES;
ADSORPTION
AB A theory-driven model is formulated for the low-temperature oxidation of uranium exposed to oxygen. The model is based on diffusion of oxygen ions through the oxide film driven by the electrostatic potential generated between the metal and adsorbed oxygen ions. The model fits published experimental data well for temperatures between 20 degrees C and 200 degrees C and for oxide film thicknesses less than 300nm. The derived reaction rate coefficients for parabolic and inverse logarithmic growth regimes correspond well to the available published values and outperform the existing empirically derived forms. These reaction rate coefficients can be applied to the oxidation of any metal that is driven by the generated electrostatic potential.
C1 [Gharagozloo, Patricia E.; Kanouff, Michael P.] Sandia Natl Labs, Livermore, CA 94551 USA.
RP Gharagozloo, PE (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA.
EM peghara@sandia.gov
FU Advanced Simulation and Computing; United States Department of Energy's
National Nuclear Security Administration [DE-AC04-94AL85000]
FX The authors would like to thank co-workers Bernice E. Mills, Andrew D.
Shugard, and Scott C. James for their feedback throughout the course of
this work. The authors acknowledge the financial support from Advanced
Simulation and Computing. Sandia is a multiprogram laboratory operated
by Sandia Corporation, a Lockheed Martin Company, for the United States
Department of Energy's National Nuclear Security Administration under
Contract DE-AC04-94AL85000.
NR 59
TC 2
Z9 2
U1 2
U2 10
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0002-7820
EI 1551-2916
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD SEP
PY 2013
VL 96
IS 9
BP 2943
EP 2949
DI 10.1111/jace.12496
PG 7
WC Materials Science, Ceramics
SC Materials Science
GA 238GM
UT WOS:000325932000043
ER
PT J
AU Rodriguez, MA
Garino, TJ
Rademacher, DX
Zhang, XY
Nenoff, TM
AF Rodriguez, Mark A.
Garino, Terry J.
Rademacher, David X.
Zhang, Xiaoyi
Nenoff, Tina M.
TI The Synthesis of Ba- and Fe- Substituted CsAlSi2O6 Pollucites
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID HYDROTHERMAL SYNTHESIS; PHASE-TRANSITION; IMMOBILIZATION; STORAGE;
NUCLEAR; CS
AB Barium-substituted CsAlSi2O6 pollucites, CsxBa(1-x)/2AlSi2O6, and barium- and iron-substituted pollucites, CsxBa(1-x)/2AlxFe1-xSi2O6 and CsxBa1-xAlxFe1-xSi2O6 were synthesized with 1x0.7 using a hydrothermal synthesis procedure. Rietveld analysis of X-ray diffraction data confirmed the substitution of Ba for Cs and Fe for Al, respectively. The crystallographic analysis also describes the effects of three different types of pollucite substitutions on the pollucite unit cell: Ba2+ for Cs1+ cation results in little effect on cell dimensions, intermediate concentrations of Ba2+ and Fe3+ substitution result in net minor expansion due to Fe3+ addition, and large Ba and Fe substitutions result in overall framework contraction. Elemental analysis combined with microscopy further supports the phase purity of these new phases. These materials can be used to study the stability of CsAlSi2O6 as a durable ceramic waste form, which could accommodate with time Cs and its decay product, Ba. Furthermore, success in iron substitution for aluminum into the pollucite lattice predicts that redox charge compensation for Cs cation decay is possible.
C1 [Rodriguez, Mark A.; Garino, Terry J.; Rademacher, David X.; Nenoff, Tina M.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Zhang, Xiaoyi] Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL 60439 USA.
RP Nenoff, TM (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM tmnenof@sandia.gov
FU DOE/NE-FCRD-Separations and Waste Forms Campaign; United States
Department of Energy's National Nuclear Safety Administration
[DE-AC04-94AL85000]; US DOE [DE-AC02-06CH11357]
FX Funding provided by DOE/NE-FCRD-Separations and Waste Forms Campaign.
Sandia is a multiprogram laboratory managed and operated by Sandia
Corporation, a wholly owned subsidiary of Lockheed Martin Company, for
the United States Department of Energy's National Nuclear Safety
Administration under Contract DE-AC04-94AL85000. Work done at Argonne
and use of the Advanced Photon Source, an Office of Science User
Facility operated for the US DOE/Office of Science by Argonne National
Laboratory, was supported by the US DOE, Contract No. DE-AC02-06CH11357.
NR 24
TC 6
Z9 6
U1 3
U2 15
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0002-7820
EI 1551-2916
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD SEP
PY 2013
VL 96
IS 9
BP 2966
EP 2972
DI 10.1111/jace.12396
PG 7
WC Materials Science, Ceramics
SC Materials Science
GA 238GM
UT WOS:000325932000046
ER
PT J
AU Shen, X
Puzyrev, YS
Pantelides, ST
AF Shen, Xiao
Puzyrev, Yevgeniy S.
Pantelides, Sokrates T.
TI Vacancy breathing by grain boundaries-a mechanism of memristive
switching in polycrystalline oxides
SO MRS COMMUNICATIONS
LA English
DT Article
ID SYSTEMS
AB It is widely believed that switching to the conductive state in memristive materials is triggered by the external field that drives defect dynamics. In polycrystalline materials, grain boundaries are further believed to cause switching by enabling faster defect motion. Here, we report a first-principle study of oxygen vacancy dynamics at a grain boundary (GB) in polycrystalline ZnO and show that switching to the conductive state is triggered by a recombination-enhanced motion of vacancies perpendicular to the GB. We call this mechanism the "breathing" trigger of memristive switching.
C1 [Shen, Xiao; Puzyrev, Yevgeniy S.; Pantelides, Sokrates T.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
[Pantelides, Sokrates T.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Pantelides, Sokrates T.] Vanderbilt Univ, Dept Elect Engn & Comp Sci, Nashville, TN 37235 USA.
RP Shen, X (reprint author), Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
EM xiao.shen@vanderbilt.edu
FU National Science Foundation [DMR-1207241]; McMinn Endowment at
Vanderbilt University; NSF XSEDE [DMR130072]
FX This work was supported by National Science Foundation grant DMR-1207241
and the McMinn Endowment at Vanderbilt University. Computational support
was provided by the NSF XSEDE under Grant # DMR130072.
NR 30
TC 4
Z9 4
U1 0
U2 17
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 2159-6859
EI 2159-6867
J9 MRS COMMUN
JI MRS Commun.
PD SEP
PY 2013
VL 3
IS 3
BP 167
EP 170
DI 10.1557/mrc.2013.32
PG 4
WC Materials Science, Multidisciplinary
SC Materials Science
GA 227FF
UT WOS:000325095100010
ER
PT J
AU Chen, XS
Park, HR
Pelton, M
Piao, XJ
Lindquist, NC
Im, H
Kim, YJ
Ahn, JS
Ahn, KJ
Park, N
Kim, DS
Oh, SH
AF Chen, Xiaoshu
Park, Hyeong-Ryeol
Pelton, Matthew
Piao, Xianji
Lindquist, Nathan C.
Im, Hyungsoon
Kim, Yun Jung
Ahn, Jae Sung
Ahn, Kwang Jun
Park, Namkyoo
Kim, Dai-Sik
Oh, Sang-Hyun
TI Atomic layer lithography of wafer-scale nanogap arrays for extreme
confinement of electromagnetic waves
SO NATURE COMMUNICATIONS
LA English
DT Article
ID ENHANCED RAMAN-SPECTROSCOPY; OPTICAL-TRANSMISSION; PLASMONIC NANOGAP;
FIELD ENHANCEMENT; LIGHT; GUIDES; DEPOSITION; APERTURES; QUANTUM; FILMS
AB Squeezing light through nanometre-wide gaps in metals can lead to extreme field enhancements, nonlocal electromagnetic effects and light-induced electron tunnelling. This intriguing regime, however, has not been readily accessible to experimentalists because of the lack of reliable technology to fabricate uniform nanogaps with atomic-scale resolution and high throughput. Here we introduce a new patterning technology based on atomic layer deposition and simple adhesive-tape-based planarization. Using this method, we create vertically oriented gaps in opaque metal films along the entire contour of a millimetre-sized pattern, with gap widths as narrow as 9.9 angstrom, and pack 150,000 such devices on a 4-inch wafer. Electromagnetic waves pass exclusively through the nanogaps, enabling background-free transmission measurements. We observe resonant transmission of near-infrared waves through 1.1-nm-wide gaps (lambda/1,295) and measure an effective refractive index of 17.8. We also observe resonant transmission of millimetre waves through 1.1-nm-wide gaps (lambda/4,000,000) and infer an unprecedented field enhancement factor of 25,000.
C1 [Chen, Xiaoshu; Lindquist, Nathan C.; Im, Hyungsoon; Oh, Sang-Hyun] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA.
[Park, Hyeong-Ryeol; Ahn, Jae Sung; Ahn, Kwang Jun; Kim, Dai-Sik] Seoul Natl Univ, Ctr Subwavelength Opt, Seoul 151747, South Korea.
[Park, Hyeong-Ryeol; Ahn, Jae Sung; Ahn, Kwang Jun; Kim, Dai-Sik] Seoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea.
[Pelton, Matthew] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Piao, Xianji; Kim, Yun Jung; Park, Namkyoo] Seoul Natl Univ, Photon Syst Lab, Sch EECS, Seoul 151744, South Korea.
RP Kim, DS (reprint author), Seoul Natl Univ, Ctr Subwavelength Opt, Seoul 151747, South Korea.
EM dsk@phya.snu.ac.kr; sang@umn.edu
RI Im, Hyungsoon/A-3178-2009; Pelton, Matthew/H-7482-2013;
OI Im, Hyungsoon/0000-0002-0626-1346; Pelton, Matthew/0000-0002-6370-8765;
Park, Namkyoo/0000-0003-0197-7633
FU US Department of Defense (DARPA Young Faculty Award) [N66001-11-1-4152];
National Research Foundation of Korea [SRC 2008-0062255, GRL
K20815000003, 2010-0029648, 20110019170]; National Science Foundation
(NSF) through the National Nanotechnology Infrastructure Network
program; NSF through the Materials Research Science and Engineering
Center; Office of Naval Research Young Investigator Award
[N00014-11-1-0645]; NSF CAREER Award [DBI 1054191]; Minnesota
Partnership Award for Biotechnology; University of Minnesota Thesis
Research Grant; US Department of Energy, Office of Science, Office of
Basic Energy Sciences [DE-AC02-06CH11357]
FX This work was supported by the US Department of Defense (DARPA Young
Faculty Award N66001-11-1-4152; X. S. C., N.C.L., H. I. and S.H.O.) and
the National Research Foundation of Korea (SRC 2008-0062255, GRL
K20815000003, 2010-0029648, 20110019170; H.-R. P., J.S.A., K.J.A.,
D.-S.K. and GRL K20815000003; X. P., Y.J.K. and N.P.). Device
fabrication was performed at the University of Minnesota Nanofabrication
Center, which receives support from the National Science Foundation
(NSF) through the National Nanotechnology Infrastructure Network
program, and the Characterization Facility, which has received capital
equipment funding from the NSF through the Materials Research Science
and Engineering Center. S.-H.O. also acknowledges support from the
Office of Naval Research Young Investigator Award (N00014-11-1-0645),
the NSF CAREER Award (DBI 1054191) and the Minnesota Partnership Award
for Biotechnology. H. I. acknowledges support from the University of
Minnesota Thesis Research Grant. Use of the Center for Nanoscale
Materials was supported by the US Department of Energy, Office of
Science, Office of Basic Energy Sciences, under Contract No.
DE-AC02-06CH11357. We thank Reuven Gordon and Sukmo Koo for their
helpful comments and David Gosztola for his valuable assistance.
NR 38
TC 79
Z9 80
U1 9
U2 100
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2013
VL 4
AR 2361
DI 10.1038/ncomms3361
PG 7
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 232YP
UT WOS:000325531000001
PM 23999053
ER
PT J
AU Hsieh, YC
Zhang, Y
Su, D
Volkov, V
Si, R
Wu, LJ
Zhu, YM
An, W
Liu, P
He, P
Ye, SY
Adzic, RR
Wang, JX
AF Hsieh, Yu-Chi
Zhang, Yu
Su, Dong
Volkov, Vyacheslav
Si, Rui
Wu, Lijun
Zhu, Yimei
An, Wei
Liu, Ping
He, Ping
Ye, Siyu
Adzic, Radoslav R.
Wang, Jia X.
TI Ordered bilayer ruthenium-platinum core-shell nanoparticles as carbon
monoxide-tolerant fuel cell catalysts
SO NATURE COMMUNICATIONS
LA English
DT Article
ID AUGMENTED-WAVE METHOD; OXYGEN REDUCTION; PREFERENTIAL OXIDATION;
HYDROGEN OXIDATION; RU NANOPARTICLES; PT-ALLOY; SURFACES; STRAIN;
ELECTROCATALYSTS; PERFORMANCE
AB Fabricating subnanometre-thick core-shell nanocatalysts is effective for obtaining high surface area of an active metal with tunable properties. The key to fully realize the potential of this approach is a reliable synthesis method to produce atomically ordered core-shell nanoparticles. Here we report new insights on eliminating lattice defects in core-shell syntheses and opportunities opened for achieving superior catalytic performance. Ordered structural transition from ruthenium hcp to platinum fcc stacking sequence at the core-shell interface is achieved via a green synthesis method, and is verified by X-ray diffraction and electron microscopic techniques coupled with density functional theory calculations. The single crystalline Ru cores with well-defined Pt bilayer shells resolve the dilemma in using a dissolution-prone metal, such as ruthenium, for alleviating the deactivating effect of carbon monoxide, opening the door for commercialization of low-temperature fuel cells that can use inexpensive reformates (H-2 with CO impurity) as the fuel.
C1 [Hsieh, Yu-Chi; Zhang, Yu; Si, Rui; An, Wei; Liu, Ping; Adzic, Radoslav R.; Wang, Jia X.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
[Su, Dong] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
[Volkov, Vyacheslav; Wu, Lijun; Zhu, Yimei] Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
[He, Ping; Ye, Siyu] Ballard Power Syst, Burnaby, BC V5J 5J8, Canada.
RP Wang, JX (reprint author), Brookhaven Natl Lab, Dept Chem, Bldg 555, Upton, NY 11973 USA.
EM jia@bnl.gov
RI Wang, Jia/B-6346-2011; An, Wei/E-9270-2010; Su, Dong/A-8233-2013;
OI An, Wei/0000-0002-0760-1357; Su, Dong/0000-0002-1921-6683; Hsieh,
Yu-Chi/0000-0003-0823-6571; Zhang, Yu/0000-0002-0814-2965
FU Brookhaven National Laboratory (BNL) [DE-AC02-98CH10886]; US Department
of Energy (DOE); DOE's Chemical Sciences, Geosciences and Biosciences
Division; BNL's Technology Maturation Fund [10-09]; National Science
Council of Taiwan [NSC-100-2917-I-009-009]; National Chiao Tung
University [NSC-100-2917-I-009-009]
FX This research was performed at Brookhaven National Laboratory (BNL)
under contract DE-AC02-98CH10886 with the US Department of Energy (DOE).
The catalyst development was funded by the DOE's Chemical Sciences,
Geosciences and Biosciences Division and the BNL's Technology Maturation
Fund (#10-09). The electron microscopic studies were carried out at the
Center for Functional Nanomaterials (CFN) and Condensed Mater Physics
and Materials Science Department. The X-ray diffractions were measured
at the X7B beamline at the National Synchrotron Light Source. The DFT
calculations utilized the computing facilities at the CFN. Y.-C.H. is
grateful to National Science Council of Taiwan and National Chiao Tung
University for the Study Abroad Scholarship (NSC-100-2917-I-009-009).
NR 54
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U1 25
U2 221
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2013
VL 4
AR 2466
DI 10.1038/ncomms3466
PG 9
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 232ZO
UT WOS:000325533900013
PM 24045405
ER
PT J
AU Intravaia, F
Koev, S
Jung, IW
Talin, AA
Davids, PS
Decca, RS
Aksyuk, VA
Dalvit, DAR
Lopez, D
AF Intravaia, Francesco
Koev, Stephan
Jung, Il Woong
Talin, A. Alec
Davids, Paul S.
Decca, Ricardo S.
Aksyuk, Vladimir A.
Dalvit, Diego A. R.
Lopez, Daniel
TI Strong Casimir force reduction through metallic surface nanostructuring
SO NATURE COMMUNICATIONS
LA English
DT Article
ID MU-M; RANGE; SOLIDS
AB The Casimir force between bodies in vacuum can be understood as arising from their interaction with an infinite number of fluctuating electromagnetic quantum vacuum modes, resulting in a complex dependence on the shape and material of the interacting objects. Becoming dominant at small separations, the force has a significant role in nanomechanics and object manipulation at the nanoscale, leading to a considerable interest in identifying structures where the Casimir interaction behaves significantly different from the well-known attractive force between parallel plates. Here we experimentally demonstrate that by nanostructuring one of the interacting metal surfaces at scales below the plasma wavelength, an unexpected regime in the Casimir force can be observed. Replacing a flat surface with a deep metallic lamellar grating with sub-100 nm features strongly suppresses the Casimir force and for large inter-surfaces separations reduces it beyond what would be expected by any existing theoretical prediction.
C1 [Intravaia, Francesco; Dalvit, Diego A. R.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Koev, Stephan; Talin, A. Alec; Aksyuk, Vladimir A.] NIST, Ctr Nanoscale Sci & Technol, Gaithersburg, MD 20899 USA.
[Koev, Stephan] Univ Maryland, Maryland Nanoctr, College Pk, MD 20742 USA.
[Jung, Il Woong; Lopez, Daniel] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Davids, Paul S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Decca, Ricardo S.] Indiana Univ Purdue Univ, Dept Phys, Indianapolis, IN 46202 USA.
RP Lopez, D (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM dlopez@anl.gov
RI Intravaia, Francesco/E-6500-2010;
OI Intravaia, Francesco/0000-0001-7993-4698; Aksyuk,
Vladimir/0000-0002-9653-4722
FU DARPA/MTO Casimir Effect Enhancement program under DOE/NNSA
[DE-AC52-06NA25396, DOE-DARPA MIPR 09-Y557]; IUPUI Nanoscale Imaging
Center, Integrated Nanosystems Development Institute, Indiana University
Collaborative Research Grants; Indiana University Center for Space
Symmetries; Center for Nanoscale Materials, a US Department of Energy,
Office of Science, Office of Basic Energy Sciences User Facility
[DE-AC02-06CH11357]
FX We are grateful to R. Behunin, H.B. Chan, J.-J. Greffet, R. Guerout, S.
Johnson, S. de Man, P. Milonni, J. Pendry, F. da Rosa and T. Kenny for
discussions. The full description of the procedures used in this paper
requires the identification of certain commercial products and their
suppliers. The inclusion of such information should in no way be
construed as indicating that such products or suppliers are endorsed by
NIST or are recommended by NIST or that they are necessarily the best
materials, instruments, software or suppliers for the purposes
described. This work was partially supported by the DARPA/MTO Casimir
Effect Enhancement program under DOE/NNSA Contract No. DE-AC52-06NA25396
and DOE-DARPA MIPR 09-Y557. R.S.D. acknowledges support from the IUPUI
Nanoscale Imaging Center, Integrated Nanosystems Development Institute,
Indiana University Collaborative Research Grants and the Indiana
University Center for Space Symmetries. This work was performed, in
part, at the Center for Nanoscale Materials, a US Department of Energy,
Office of Science, Office of Basic Energy Sciences User Facility under
Contract No. DE-AC02-06CH11357.
NR 38
TC 38
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U1 2
U2 31
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2013
VL 4
AR 2515
DI 10.1038/ncomms3515
PG 8
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 233AE
UT WOS:000325535500001
PM 24071657
ER
PT J
AU Jacques, SDM
Di Michiel, M
Kimber, SAJ
Yang, XH
Cernik, RJ
Beale, AM
Billinge, SJL
AF Jacques, Simon D. M.
Di Michiel, Marco
Kimber, Simon A. J.
Yang, Xiaohao
Cernik, Robert J.
Beale, Andrew M.
Billinge, Simon J. L.
TI Pair distribution function computed tomography
SO NATURE COMMUNICATIONS
LA English
DT Article
ID ACTIVE PHASE EVOLUTION; MAGNETIC-RESONANCE; CATALYST BODIES; RAY;
NANOPARTICLES; TIME; NANOSCIENCE; SYNCHROTRON; HYDROGENATION;
SPECTROSCOPY
AB An emerging theme of modern composites and devices is the coupling of nanostructural properties of materials with their targeted arrangement at the microscale. Of the imaging techniques developed that provide insight into such designer materials and devices, those based on diffraction are particularly useful. However, to date, these have been heavily restrictive, providing information only on materials that exhibit high crystallographic ordering. Here we describe a method that uses a combination of X-ray atomic pair distribution function analysis and computed tomography to overcome this limitation. It allows the structure of nanocrystalline and amorphous materials to be identified, quantified and mapped. We demonstrate the method with a phantom object and subsequently apply it to resolving, in situ, the physicochemical states of a heterogeneous catalyst system. The method may have potential impact across a range of disciplines from materials science, biomaterials, geology, environmental science, palaeontology and cultural heritage to health.
C1 [Jacques, Simon D. M.; Cernik, Robert J.] Univ Manchester, Sch Mat, Manchester M13 9PL, Lancs, England.
[Jacques, Simon D. M.; Beale, Andrew M.] Rutherford Appleton Lab, Res Complex Harwell, Didcot OX11 0QX, Oxon, England.
[Di Michiel, Marco; Kimber, Simon A. J.] European Synchrotron Radiat Facil, F-38000 Grenoble, France.
[Yang, Xiaohao; Billinge, Simon J. L.] Columbia Univ, New York, NY 10027 USA.
[Beale, Andrew M.] UCL, Dept Chem, London WC1H 0AJ, England.
[Beale, Andrew M.] Univ Utrecht, Debye Inst Nanomat Sci, NL-3584 CG Utrecht, Netherlands.
[Billinge, Simon J. L.] Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
RP Beale, AM (reprint author), Rutherford Appleton Lab, Res Complex Harwell, Didcot OX11 0QX, Oxon, England.
EM Andrew.Beale@ucl.ac.uk
RI Jacques, Simon/C-6960-2009; Institute (DINS), Debye/G-7730-2014;
OI Jacques, Simon/0000-0002-7275-5272; Kimber, Simon/0000-0003-0489-1851;
Beale, Andrew/0000-0002-0923-1433
FU Engineering and Physical Sciences Research Council (EPSRC)
[EP/H046577/1, EP/K007467/1]; Office of Science, US Department of Energy
(OS-DOE) [DE-AC02-98CH10886]; ESRF
FX We acknowledge the ESRF for the award of in-house experimental time.
S.D.M.J. and A.M.B. are supported by the Engineering and Physical
Sciences Research Council (EPSRC) Grants EP/H046577/1 and EP/K007467/1,
respectively. Work in the S.J.L.B. group was supported by the Office of
Science, US Department of Energy (OS-DOE), under Contract No.
DE-AC02-98CH10886.
NR 56
TC 31
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U1 3
U2 70
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2013
VL 4
AR 2536
DI 10.1038/ncomms3536
PG 7
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 233AV
UT WOS:000325537400001
PM 24077398
ER
PT J
AU Li, WZ
Kovarik, L
Mei, DH
Liu, J
Wang, Y
Peden, CHF
AF Li, Wei-Zhen
Kovarik, Libor
Mei, Donghai
Liu, Jun
Wang, Yong
Peden, Charles H. F.
TI Stable platinum nanoparticles on specific MgAl2O4 spinel facets at high
temperatures in oxidizing atmospheres
SO NATURE COMMUNICATIONS
LA English
DT Article
ID SPACE GAUSSIAN PSEUDOPOTENTIALS; N-BUTANE DEHYDROGENATION; SELECTIVE
OXIDATION; SURFACE-ENERGY; CATALYSTS; BEHAVIOR; METHANOL; ALUMINA;
OXIDE; DEACTIVATION
AB The development of thermally stable, nanometer-sized precious metal-based catalysts remains a daunting challenge. Such materials, especially those based on the use of costly platinum metal, are essential and, to date, non-replaceable for a large number of industrially important catalytic processes. Here we report a well-defined cuboctahedral MgAl2O4 spinel support material that is capable of stabilizing platinum particles in the range of 1-3 nm on its relatively abundant {111} facets during extremely severe aging at 800 degrees C in air for 1 week. The aged catalysts retain platinum dispersions of 15.9% with catalytic activities for methanol oxidation being similar to 80% of that of fresh ones, whereas a conventional Pt/gamma-Al2O3 catalyst is severely sintered and nearly inactive. We reveal the origin of the markedly superior ability of spinel {111} facets, resulting from strong interactions between spinel surface oxygens and epitaxial platinum {111} facets, inspiring the rational design of anti-sintering supported platinum group catalysts.
C1 [Li, Wei-Zhen; Kovarik, Libor; Mei, Donghai; Liu, Jun; Wang, Yong; Peden, Charles H. F.] Inst Integrated Catalysis, Pacific Northwest Natl Lab, Richland, WA 99352 USA.
[Wang, Yong] Washington State Univ, Gene & Linda Voiland Sch Chem Engn & Bioengn, Pullman, WA 99164 USA.
RP Peden, CHF (reprint author), Inst Integrated Catalysis, Pacific Northwest Natl Lab, POB 999, Richland, WA 99352 USA.
EM chuck.peden@pnnl.gov
RI Mei, Donghai/A-2115-2012; Li, Wei-Zhen/G-2602-2013; Li,
Wei-Zhen/A-9715-2015; Mei, Donghai/D-3251-2011; Kovarik,
Libor/L-7139-2016;
OI Mei, Donghai/0000-0002-0286-4182; Li, Wei-Zhen/0000-0002-2298-1423;
Kovarik, Libor/0000-0002-2418-6925; Peden, Charles/0000-0001-6754-9928
FU US Department of Energy (DOE), Office of Basic Energy Sciences, Division
of Chemical Sciences, Biosciences and Geosciences; DOE Office of
Biological and Environmental Research
FX This work was supported by US Department of Energy (DOE), Office of
Basic Energy Sciences, Division of Chemical Sciences, Biosciences and
Geosciences. The research was performed in the Environmental Molecular
Sciences Laboratory (EMSL), a national scientific user facility
sponsored by the DOE Office of Biological and Environmental Research,
and located at Pacific Northwest National Laboratory (PNNL). PNNL is
operated for DOE by Battelle. Dr Mark Bowden (PNNL/EMSL) for analysis of
the XRD data.
NR 46
TC 31
Z9 31
U1 15
U2 148
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2013
VL 4
AR 2481
DI 10.1038/ncomms3481
PG 8
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 232ZO
UT WOS:000325533900028
PM 24064958
ER
PT J
AU Miura, M
Maiorov, B
Kato, T
Shimode, T
Wada, K
Adachi, S
Tanabe, K
AF Miura, Masashi
Maiorov, Boris
Kato, Takeharu
Shimode, Takashi
Wada, Keisuke
Adachi, Seiji
Tanabe, Keiichi
TI Strongly enhanced flux pinning in one-step deposition of
BaFe2(As0.66P0.33)(2) superconductor films with uniformly dispersed
BaZrO3 nanoparticles
SO NATURE COMMUNICATIONS
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTORS; YBA2CU3O7; MECHANISM; DEFECTS; WIRES
AB The high upper critical field and low anisotropy of the iron-based superconductor BaFe2As2 make it promising for its use in the construction of superconducting magnets. However, its critical current density in high magnetic fields needs to be improved. Here we demonstrate a simple, one-step and industrially scalable means of achieving just this. We show that introducing controlled amounts of uniformly dispersed BaZrO3 nanoparticles into carrier-doped BaFe2As2 significantly improves its superconducting performance without degrading its structural or superconducting properties. Our BaFe2(As0.66P0.33)(2) films also exhibit an increase in both the irreversibility line and critical current density at all magnetic-field orientations. These films exhibit nearly isotropic critical current densities in excess of 1.5 MA cm(-2) at 15 K and 1 T-seven times higher than previously reported for BaFe2As2 films. The vortex-pinning force in these films reaches similar to 59 GN m(-3) at 5 K and 3-9 T, substantially higher than that of the conventional Nb3Sn wire.
C1 [Miura, Masashi; Shimode, Takashi; Wada, Keisuke; Adachi, Seiji; Tanabe, Keiichi] Int Superconduct Technol Ctr, Superconduct Res Lab, Koto Ku, Tokyo 1350062, Japan.
[Miura, Masashi] Seikei Univ, Grad Sch Sci & Technol, Musashino, Tokyo 1808633, Japan.
[Maiorov, Boris] Los Alamos Natl Lab, Div Mat Phys & Applicat, Los Alamos, NM 87545 USA.
[Kato, Takeharu] Japan Fine Ceram Ctr, Mat R&D Lab, Atuta Ku, Nagoya, Aichi 4568587, Japan.
RP Miura, M (reprint author), Int Superconduct Technol Ctr, Superconduct Res Lab, Koto Ku, 10-13,Shinonome 1 Chome, Tokyo 1350062, Japan.
EM masashi-m@st.seikei.ac.jp
OI Maiorov, Boris/0000-0003-1885-0436
FU Japan Society for the Promotion of Science, Japan, through the 'Funding
Program for World-Leading Innovative R&D on Science and Technology
Program'; TEPCO Memorial Foundation, Japan; US DOE, Office of Basic
Energy Sciences, Materials Sciences and Engineering Division
FX This work was supported by the Japan Society for the Promotion of
Science, Japan, through the 'Funding Program for World-Leading
Innovative R&D on Science and Technology Program'. M.M. is supported by
the TEPCO Memorial Foundation, Japan. The work at Los Alamos National
Laboratory was supported by the US DOE, Office of Basic Energy Sciences,
Materials Sciences and Engineering Division (B.M.). We would like to
thank Akira Takemori and Yasuo Oshikubo for photolithography
preparation. M.M. would like to thank Jeffrey O. Willis for helpful
discussions and critical reading of the manuscript.
NR 38
TC 35
Z9 35
U1 1
U2 34
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2013
VL 4
AR 2499
DI 10.1038/ncomms3499
PG 7
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 232ZY
UT WOS:000325534900001
PM 24051678
ER
PT J
AU Truncik, CJS
Huttema, WA
Turner, PJ
Ozcan, S
Murphy, NC
Carriere, PR
Thewalt, E
Morse, KJ
Koenig, AJ
Sarrao, JL
Broun, DM
AF Truncik, C. J. S.
Huttema, W. A.
Turner, P. J.
Oezcan, S.
Murphy, N. C.
Carriere, P. R.
Thewalt, E.
Morse, K. J.
Koenig, A. J.
Sarrao, J. L.
Broun, D. M.
TI Nodal quasiparticle dynamics in the heavy fermion superconductor CeCoIn5
revealed by precision microwave spectroscopy
SO NATURE COMMUNICATIONS
LA English
DT Article
ID CAVITY PERTURBATION TECHNIQUE; MAGNETIC PENETRATION DEPTH; D-WAVE
SUPERCONDUCTORS; QUANTUM CRITICAL-POINT; COHERENCE PEAK; SCATTERING;
CONDUCTIVITY; METALS; DEPENDENCE; STATES
AB CeCoIn5 is a heavy fermion superconductor with strong similarities to the high-T-c cuprates, including quasi-two-dimensionality, proximity to antiferromagnetism and probable d-wave pairing arising from a non-Fermi-liquid normal state. Experiments allowing detailed comparisons of their electronic properties are of particular interest, but in most cases are difficult to realize, due to their very different transition temperatures. Here we use low-temperature microwave spectroscopy to study the charge dynamics of the CeCoIn5 superconducting state. The similarities to cuprates, in particular to ultra-clean YBa2Cu3Oy, are striking: the frequency and temperature dependence of the quasiparticle conductivity are instantly recognizable, a consequence of rapid suppression of quasiparticle scattering below T-c; and penetration-depth data, when properly treated, reveal a clean, linear temperature dependence of the quasiparticle contribution to superfluid density. The measurements also expose key differences, including prominent multiband effects and a temperature-dependent renormalization of the quasiparticle mass.
C1 [Truncik, C. J. S.; Huttema, W. A.; Turner, P. J.; Murphy, N. C.; Carriere, P. R.; Thewalt, E.; Morse, K. J.; Koenig, A. J.; Broun, D. M.] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada.
[Oezcan, S.] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
[Sarrao, J. L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Broun, DM (reprint author), Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada.
EM dbroun@sfu.ca
FU Natural Science and Engineering Research Council of Canada; Canadian
Foundation for Innovation; Division of Materials Science and Engineering
of the U.S. Department of Energy Office of Basic Energy Sciences
FX We thank M. Dressel, S.R. Julian and M. Scheffler for discussions and
correspondence. Research support for the experiments was provided by the
Natural Science and Engineering Research Council of Canada and the
Canadian Foundation for Innovation. Research support for sample
preparation was provided by the Division of Materials Science and
Engineering of the U.S. Department of Energy Office of Basic Energy
Sciences.
NR 60
TC 15
Z9 15
U1 3
U2 18
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2013
VL 4
AR 2477
DI 10.1038/ncomms3477
PG 10
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 232ZO
UT WOS:000325533900024
PM 24051545
ER
PT J
AU Zhan, C
Lu, J
Kropf, AJ
Wu, TP
Jansen, AN
Sun, YK
Qiu, XP
Amine, K
AF Zhan, Chun
Lu, Jun
Kropf, A. Jeremy
Wu, Tianpin
Jansen, Andrew N.
Sun, Yang-Kook
Qiu, Xinping
Amine, Khalil
TI Mn(II) deposition on anodes and its effects on capacity fade in spinel
lithium manganate-carbon systems
SO NATURE COMMUNICATIONS
LA English
DT Article
ID LI-ION BATTERIES; TEMPERATURE CYCLING STABILITY; ELEVATED-TEMPERATURE;
CATHODE MATERIALS; GRAPHITE ANODES; LIMN2O4 CATHODE; ELECTROLYTE; CELLS;
PERFORMANCE; IMPEDANCE
AB Dissolution and migration of manganese from cathode lead to severe capacity fading of lithium manganate-carbon cells. Overcoming this major problem requires a better understanding of the mechanisms of manganese dissolution, migration and deposition. Here we apply a variety of advanced analytical methods to study lithium manganate cathodes that are cycled with different anodes. We show that the oxidation state of manganese deposited on the anodes is +2, which differs from the results reported earlier. Our results also indicate that a metathesis reaction between Mn(II) and some species on the solid-electrolyte interphase takes place during the deposition of Mn(II) on the anodes, rather than a reduction reaction that leads to the formation of metallic Mn, as speculated in earlier studies. The concentration of Mn deposited on the anode gradually increases with cycles; this trend is well correlated with the anodes rising impedance and capacity fading of the cell.
C1 [Zhan, Chun; Qiu, Xinping] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China.
[Zhan, Chun; Lu, Jun; Kropf, A. Jeremy; Jansen, Andrew N.; Amine, Khalil] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
[Wu, Tianpin] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA.
[Sun, Yang-Kook] Hanyang Univ, Dept Energy Engn, Seoul 133791, South Korea.
RP Qiu, XP (reprint author), Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China.
EM qiuxp@mail.tsinghua.edu.cn; amine@anl.gov
RI Amine, Khalil/K-9344-2013; BM, MRCAT/G-7576-2011; ID, MRCAT/G-7586-2011;
Jansen, Andrew/Q-5912-2016
OI Jansen, Andrew/0000-0003-3244-7790
FU Department of Energy (DOE) Office of Energy Efficiency and Renewable
Energy (EERE) Postdoctoral Research Award under the EERE Vehicles
Technology Program; DOE [DE-AC05-06OR23100]; Center for Electrical
Energy Storage, an Energy Frontier Research Center; U.S. Department of
Energy, Office of Science, Office of Basic Energy Sciences; Applied
Battery Research for Transportation (ABR) Program from the U. S.
DOE-EERE Office of Vehicle Technologies; U.S. DOE [DE-AC02-06CH11357];
973 Program of China [2009CB220105]; Beijing Natural Science Foundation
[2120001]; National Natural Science Foundation of China [21273129];
Bosch (China) Ltd.; Human Resources Development of the Korea Institute
of Energy Technology Evaluation and Planning (KETEP) grant; Korean
government, Ministry of Trade, Industry and Energy [20124010203310];
National Research Foundation of Korea (NRF); Korea government (MEST)
[2009-0092780]
FX L. was supported by the Department of Energy (DOE) Office of Energy
Efficiency and Renewable Energy (EERE) Postdoctoral Research Award under
the EERE Vehicles Technology Program administered by the Oak Ridge
Institute for Science and Education (ORISE) for the DOE managed by Oak
Ridge Associated Universities (ORAU) under DOE contract number
DE-AC05-06OR23100. K. A. and A. J. K. (X-ray absorption studies) were
supported by the Center for Electrical Energy Storage, an Energy
Frontier Research Center funded by the U.S. Department of Energy, Office
of Science, Office of Basic Energy Sciences. A. N. J. was supported by
the Applied Battery Research for Transportation (ABR) Program from the
U. S. DOE-EERE Office of Vehicle Technologies. Use of the Advanced
Photon Source, an Office of Science User Facility operated for DOE,
Office of Science by Argonne National Laboratory, was supported by the
U.S. DOE under Contract No. DE-AC02-06CH11357. MRCAT operations are
supported by the DOE and the MRCAT member institutions. Financial
support from the 973 Program (2009CB220105) of China, Beijing Natural
Science Foundation (2120001), National Natural Science Foundation of
China (21273129) and Bosch (China) Ltd. is gratefully acknowledged. This
work was also supported by the Human Resources Development of the Korea
Institute of Energy Technology Evaluation and Planning (KETEP) grant
funded by the Korean government, Ministry of Trade, Industry and Energy
(No. 20124010203310) and by the National Research Foundation of Korea
(NRF) grant funded by the Korea government (MEST) (No. 2009-0092780).
NR 41
TC 62
Z9 62
U1 21
U2 221
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2013
VL 4
AR 2437
DI 10.1038/ncomms3437
PG 8
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 232ZM
UT WOS:000325533700034
PM 24077265
ER
PT J
AU Zhang, LJ
Luo, JW
Saraiva, A
Koiller, B
Zunger, A
AF Zhang, Lijun
Luo, Jun-Wei
Saraiva, Andre
Koiller, Belita
Zunger, Alex
TI Genetic design of enhanced valley splitting towards a spin qubit in
silicon
SO NATURE COMMUNICATIONS
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; SI QUANTUM-WELLS; STRAINED SI;
HETEROSTRUCTURES; GE; ENERGY; SUPERLATTICES; DEVICES; LAYERS
AB The long spin coherence time and microelectronics compatibility of Si makes it an attractive material for realizing solid-state qubits. Unfortunately, the orbital (valley) degeneracy of the conduction band of bulk Si makes it difficult to isolate individual two-level spin-1/2 states, limiting their development. This degeneracy is lifted within Si quantum wells clad between Ge-Si alloy barrier layers, but the magnitude of the valley splittings achieved so far is small-of the order of 1 meV or less-degrading the fidelity of information stored within such a qubit. Here we combine an atomistic pseudopotential theory with a genetic search algorithm to optimize the structure of layered-Ge/Si-clad Si quantum wells to improve this splitting. We identify an optimal sequence of multiple Ge/Si barrier layers that more effectively isolates the electron ground state of a Si quantum well and increases the valley splitting by an order of magnitude, to similar to 9 meV.
C1 [Zhang, Lijun; Zunger, Alex] Univ Colorado, Boulder, CO 80309 USA.
[Zhang, Lijun; Luo, Jun-Wei] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Saraiva, Andre; Koiller, Belita] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, Brazil.
RP Zhang, LJ (reprint author), Univ Colorado, Boulder, CO 80309 USA.
EM lijun.zhang@colorado.edu; bk@if.ufrj.br; alex.zunger@colorado.edu
RI Zhang, Lijun/F-7710-2011; LUO, JUNWEI/B-6545-2013
FU Office of Science, Basic Energy Science, MSE division
[DE-FG02-13ER46959]; Center for Inverse Design, an Energy Frontier
Research Center; U.S. Department of Energy, Office of Science, Basic
Energy Sciences [DE-AC36-08GO28308]; FAPERJ; CNPq; CAPES
FX We thank M.A. Eriksson for stimulating discussion, M. d'Avezac for
valuable help on calculations and F. Tsui for helpful discussion on
epitaxial growth of Si-Ge layered structures. Work of L.Z. and A.Z. was
supported by Office of Science, Basic Energy Science, MSE division under
grant DE-FG02-13ER46959 to CU Boulder. Work of L.Z. and J.W. on adapting
the genetic algorithm approach was supported as part of the Center for
Inverse Design, an Energy Frontier Research Center funded by the U.S.
Department of Energy, Office of Science, Basic Energy Sciences under
Award no. DE-AC36-08GO28308. The work of A.S. and B.K. work is part of
the Brazilian National Institute for Science and Technology on Quantum
Information. A.S. and B.K. acknowledge partial support from FAPERJ, CNPq
and CAPES.
NR 45
TC 10
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U1 2
U2 37
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2013
VL 4
AR 2396
DI 10.1038/ncomms3396
PG 7
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 232ZF
UT WOS:000325532800005
PM 24013452
ER
PT J
AU Beresh, SJ
Henfling, JF
Spillers, RW
Pruett, BOM
AF Beresh, Steven J.
Henfling, John F.
Spillers, Russell W.
Pruett, Brian O. M.
TI Very-large-scale coherent structures in the wall pressure field beneath
a supersonic turbulent boundary layer
SO PHYSICS OF FLUIDS
LA English
DT Article
ID HIGH-REYNOLDS-NUMBER; FLUCTUATIONS; RESOLUTION; FEATURES; MOTIONS; FLOW
AB Data have been acquired from a spanwise array of fluctuating wall pressure sensors beneath a wind tunnel wall boundary layer at Mach 2, then invoking Taylor's hypothesis allows the temporal signals to be converted into a spatial map of the wall pressure field. Different frequency ranges of pressure fluctuations may be accessed by bandpass filtering the signals. In all frequency ranges, this reveals signatures of coherent structures where negative pressure events are interspersed amongst positive events, with some degree of alternation in the streamwise direction. Within lower frequency ranges, streaks of instantaneously correlated pressure fluctuations elongated in the streamwise direction exhibit a spanwise meander and show apparent merging of pressure events. Coherent length scales based on single-sensor correlations are artificially shortened by neglecting this meander and merging, but are captured correctly using the sensor array. These measurements are consistent with similar observations by other researchers in the velocity field above the wall, and explain the presence of the flat portion of the wall pressure spectrum at frequencies well below those associated with the boundary layer thickness. However, the pressure data lack the common spanwise alternation of positive and negative events found in velocity data, and conversely demonstrate a weak positive correlation in the spanwise direction at low frequencies. (C) 2013 AIP Publishing LLC.
C1 [Beresh, Steven J.; Henfling, John F.; Spillers, Russell W.; Pruett, Brian O. M.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Beresh, SJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM sjberes@sandia.gov
FU Sandia National Laboratories; (U.S.) Department of Energy (DOE); (U.S.)
Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]
FX This work is supported by Sandia National Laboratories and the (U.S.)
Department of Energy (DOE). Sandia is a multiprogram laboratory managed
and operated by Sandia Corporation, a wholly owned subsidiary of
Lockheed Martin Corporation, for the (U.S.) Department of Energy's
National Nuclear Security Administration under Contract No.
DE-AC04-94AL85000.
NR 37
TC 0
Z9 0
U1 0
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 1070-6631
EI 1089-7666
J9 PHYS FLUIDS
JI Phys. Fluids
PD SEP
PY 2013
VL 25
IS 9
AR 095104
DI 10.1063/1.4820818
PG 19
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 231EU
UT WOS:000325397800057
ER
PT J
AU Dahms, RN
Oefelein, JC
AF Dahms, Rainer N.
Oefelein, Joseph C.
TI On the transition between two-phase and single-phase interface dynamics
in multicomponent fluids at supercritical pressures
SO PHYSICS OF FLUIDS
LA English
DT Article
ID UNDERSTANDING IGNITION PROCESSES; FLAME FRONT PROPAGATION; LINEAR
GRADIENT THEORY; LARGE-EDDY SIMULATION; BINARY-MIXTURES;
SURFACE-TENSION; CRYOGENIC PROPELLANTS; CORRESPONDING STATES;
TRANSPORT-PROPERTIES; BURNING DROPLET
AB A theory that explains the operating pressures where liquid injection processes transition from exhibiting classical two-phase spray atomization phenomena to single-phase diffusion-dominated mixing is presented. Imaging from a variety of experiments have long shown that under certain conditions, typically when the pressure of the working fluid exceeds the thermodynamic critical pressure of the liquid phase, the presence of discrete two-phase flow processes become diminished. Instead, the classical gas-liquid interface is replaced by diffusion-dominated mixing. When and how this transition occurs, however, is not well understood. Modern theory still lacks a physically based model to quantify this transition and the precise mechanisms that lead to it. In this paper, we derive a new model that explains how the transition occurs in multicomponent fluids and present a detailed analysis to quantify it. The model applies a detailed property evaluation scheme based on a modified 32-term Benedict-Webb-Rubin equation of state that accounts for the relevant real-fluid thermodynamic and transport properties of the multicomponent system. This framework is combined with Linear Gradient Theory, which describes the detailed molecular structure of the vapor-liquid interface region. Our analysis reveals that the two-phase interface breaks down not necessarily due to vanishing surface tension forces, but due to thickened interfaces at high subcritical temperatures coupled with an inherent reduction of the mean free molecular path. At a certain point, the combination of reduced surface tension, the thicker interface, and reduced mean free molecular path enter the continuum length scale regime. When this occurs, inter-molecular forces approach that of the multicomponent continuum where transport processes dominate across the interfacial region. This leads to a continuous phase transition from compressed liquid to supercritical mixture states. Based on this theory, a regime diagram for liquid injection is developed that quantifies the conditions under which classical sprays transition to dense-fluid jets. It is shown that the chamber pressure required to support diffusion-dominated mixing dynamics depends on the composition and temperature of the injected liquid and ambient gas. To illustrate the method and analysis, we use conditions typical of diesel engine injection. We also present a companion set of high-speed images to provide experimental validation of the presented theory. The basic theory is quite general and applies to a wide range of modern propulsion and power systems such as liquid rockets, gas turbines, and reciprocating engines. Interestingly, the regime diagram associated with diesel engine injection suggests that classical spray phenomena at typical injection conditions do not occur. (C) 2013 AIP Publishing LLC.
C1 [Dahms, Rainer N.; Oefelein, Joseph C.] Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA.
RP Dahms, RN (reprint author), Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA.
EM Rndahms@sandia.gov
FU (U.S.) Department of Energy (DOE); Office of Science (SC); Basic Energy
Sciences (BES) program; Office of Energy Efficiency and Renewable Energy
(EERE) [KC0301020]; Vehicle Technologies (VT) program [VT0401000];
SC-BES program; EERE-VT program; (U.S.) Department of Energy (DOE)
[DE-AC04-94-AL85000]
FX Support for this research was provided jointly by the (U.S.) Department
of Energy (DOE); Office of Science (SC), Basic Energy Sciences (BES)
program; and the Office of Energy Efficiency and Renewable Energy
(EERE), Vehicle Technologies (VT) program, under Grant Nos. KC0301020
and VT0401000, respectively. Fundamental development of the real-fluid
model and foundational property evaluation schemes for multicomponent
hydrocarbon mixtures was supported by the SC-BES program. Application of
these tools to advanced engine combustion research and development of
multiphase regime diagrams using Gradient Theory was supported by the
EERE-VT program. Sandia National Laboratories is a multiprogram
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the (U.S.) Department of Energy (DOE) under Contract No.
DE-AC04-94-AL85000.
NR 71
TC 21
Z9 23
U1 4
U2 48
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-6631
EI 1089-7666
J9 PHYS FLUIDS
JI Phys. Fluids
PD SEP
PY 2013
VL 25
IS 9
AR 092103
DI 10.1063/1.4820346
PG 24
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 231EU
UT WOS:000325397800026
ER
PT J
AU Myint, PC
Firoozabadi, A
AF Myint, Philip C.
Firoozabadi, Abbas
TI Onset of convection with fluid compressibility and interface movement
SO PHYSICS OF FLUIDS
LA English
DT Article
ID BUOYANCY-DRIVEN CONVECTION; LONG-TERM STORAGE; POROUS-MEDIA;
CARBON-DIOXIDE; BOUNDARY-CONDITIONS; GEOLOGICAL STORAGE; CO2
SEQUESTRATION; SALINE AQUIFERS; DENSITY; FLOW
AB The density increase from carbon dioxide (CO2) dissolution in water or hydrocarbons creates buoyancy-driven instabilities that may lead to the onset of convection. The convection is important for both CO2 sequestration in deep saline aquifers and CO2 improved oil recovery from hydrocarbon reservoirs. We perform linear stability analyses to study the effect of fluid compressibility and interface movement on the onset of buoyancy-driven convection in porous media. Compressibility relates to a non-zero divergence of the velocity field. The interface between the CO2 phase and the aqueous or hydrocarbon phase moves with time as a result of the volume change that occurs upon CO2 dissolution. Previous stability analyses have neglected these two aspects by assuming that the aqueous or hydrocarbon phase is incompressible and that the interface remains fixed in position. The stability analyses are used to compute two key quantities: (1) the critical time and (2) the critical wavenumber. Our results indicate that compressibility has a negligible effect on the critical time and the critical wavenumber in CO2-water mixtures. We use thermodynamics to derive an expression which shows that the two opposing physical processes which contribute to the divergence are comparable in magnitude and largely cancel each other. This result explains why compressibility does not significantly affect the onset, and it also demonstrates the link between compressibility and the volume change that causes movement of the interface. Compared to when the interface is fixed in position, a moving interface in CO2-water mixtures may reduce the critical time by up to around 10%, which can be significant in low permeability formations. The decrease in the critical time due to interface movement may be much more pronounced in hydrocarbons than in water. This could have important implications for CO2 improved oil recovery. (C) 2013 AIP Publishing LLC.
C1 [Myint, Philip C.; Firoozabadi, Abbas] Yale Univ, Dept Chem & Environm Engn, New Haven, CT 06511 USA.
[Myint, Philip C.] Lawrence Livermore Natl Lab, Atmospher Earth & Energy Div, Livermore, CA 94550 USA.
[Firoozabadi, Abbas] Reservoir Engn Res Inst, Palo Alto, CA 94301 USA.
RP Myint, PC (reprint author), Yale Univ, Dept Chem & Environm Engn, 9 Hillhouse Ave, New Haven, CT 06511 USA.
EM philip.myint@yale.edu; abbas.firoozabadi@yale.edu
OI Myint, Philip/0000-0003-4383-5350
FU Reservoir Engineering Research Institute
FX Financial support for this work has been provided by the member
companies of the Reservoir Engineering Research Institute.
NR 47
TC 10
Z9 10
U1 2
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-6631
EI 1089-7666
J9 PHYS FLUIDS
JI Phys. Fluids
PD SEP
PY 2013
VL 25
IS 9
AR 094105
DI 10.1063/1.4821743
PG 16
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 231EU
UT WOS:000325397800052
ER
PT J
AU Atanasiu, CV
Zakharov, LE
AF Atanasiu, C. V.
Zakharov, L. E.
TI Response of a partial wall to an external perturbation of rotating
plasma
SO PHYSICS OF PLASMAS
LA English
DT Article
ID EDDY CURRENTS; RESISTIVE WALL; FEEDBACK STABILIZATION; TOKAMAK; MODES;
STABILITY; GEOMETRY
AB In this paper, we present the response of a 3D thin multiply connected wall to an external kink mode perturbation in axisymmetric tokamak configurations. To calculate the contribution of the plasma perturbed magnetic field in the vacuum region, we have made use of the concept of surface currents [following C. V. Atanasiu, A. H. Boozer, L. E. Zakharov, and A. A. Subbotin, Phys. Plasmas 6, 2781 (1999)]. The wall response is expressed in terms of a stream function of the wall surface currents, which are obtained by solving a diffusion type equation, taking into account the contribution of the wall currents themselves iteratively. The use of stream function makes the approach applicable for both well-studied earlier Resistive Wall Modes and for Wall Touching Kink Modes, which were discovered recently as a key phenomenon in disruptions [L. E. Zakharov, S. A. Galkin, and S. N. Gerasimov, Phys. Plasmas 19, 055703 (2012)]. New analytical expressions, suitable for numerical calculations of toroidal harmonics of the vacuum magnetic fields from the surface currents on axisymmetric shells, are derived. (C) 2013 AIP Publishing LLC.
C1 [Atanasiu, C. V.] Assoc EURATOM MEdC, Natl Inst Laser Plasma & Radiat Phys, Magurele 077125, Romania.
[Zakharov, L. E.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Atanasiu, CV (reprint author), Assoc EURATOM MEdC, Natl Inst Laser Plasma & Radiat Phys, Magurele 077125, Romania.
EM cva@ipp.mpg.de; zakharov@pppl.gov
FU Association EURATOM-MEdC [BS-1]; US DoE [DE-AC02-09-CH11466]
FX Part of this work was conducted during a research stay by C. V. A. to
the Max-Planck Institute for Plasmaphysics in Garching, Germany. The
hospitality of that Institute is greatly appreciated. This work was
partially supported by the Contract BS-1 of the Association EURATOM-MEdC
(C. V. A.), and partially by US DoE Contract No. DE-AC02-09-CH11466 (C.
V. A. and L.E.Z.).
NR 44
TC 6
Z9 6
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 2013
VL 20
IS 9
AR 092506
DI 10.1063/1.4821124
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 231FE
UT WOS:000325399400044
ER
PT J
AU Ebrahimi, F
Hooper, EB
Sovinec, CR
Raman, R
AF Ebrahimi, F.
Hooper, E. B.
Sovinec, C. R.
Raman, R.
TI Magnetic reconnection process in transient coaxial helicity injection
SO PHYSICS OF PLASMAS
LA English
DT Article
ID PLASMA
AB The physics of magnetic reconnection and fast flux closure in transient coaxial helicity injection experiments in NSTX is examined using resistive MHD simulations. These simulations have been performed using the NIMROD code with fixed boundary flux (including NSTX poloidal coil currents) in the NSTX experimental geometry. Simulations show that an X point is formed in the injector region, followed by formation of closed flux surfaces within 0.5 ms after the driven injector voltage and injector current begin to rapidly decrease. As the injector voltage is turned off, the field lines tend to untwist in the toroidal direction and magnetic field compression exerts a radial J x B force and generates a bi-directional radial E-toroidal x B-poloidal pinch flow to bring oppositely directed field lines closer together to reconnect. At sufficiently low magnetic diffusivity (high Lundquist number), and with a sufficiently narrow injector flux footprint width, the oppositely directed field lines have sufficient time to reconnect (before dissipating), leading to the formation of closed flux surfaces. The reconnection process is shown to have transient Sweet-Parker characteristics. (C) 2013 AIP Publishing LLC.
C1 [Ebrahimi, F.] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
[Hooper, E. B.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Sovinec, C. R.] Univ Wisconsin, Madison, WI 53706 USA.
[Raman, R.] Univ Washington, Seattle, WA 98195 USA.
RP Ebrahimi, F (reprint author), Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
EM ebrahimi@princeton.edu
OI Ebrahimi, Fatima/0000-0003-3109-5367
FU DOE at PU [DOE-FG02-12ER55115]; CMSO, PSI Center [DE-FC02-05ER54813,
LLNL DE-AC52-07NA27344, DE-FG02-99ER54519]
FX We would like to thank A. Bhattacharjee, J. Menard, S. Kaye, and R.
Kulsrud for their helpful comments. This work is supported by DOE at PU
DOE-FG02-12ER55115 and CMSO, PSI Center DE-FC02-05ER54813, LLNL
DE-AC52-07NA27344, and DE-FG02-99ER54519.
NR 15
TC 12
Z9 12
U1 3
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 2013
VL 20
IS 9
AR 090702
DI 10.1063/1.4821974
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 231FE
UT WOS:000325399400002
ER
PT J
AU Farmer, WA
Ryutov, DD
AF Farmer, W. A.
Ryutov, D. D.
TI Axisymmetric curvature-driven instability in a model divertor geometry
SO PHYSICS OF PLASMAS
LA English
DT Article
ID STABILITY; ENERGY; PLASMA
AB A model problem is presented which qualitatively describes a pressure-driven instability which can occur near the null-point in the divertor region of a tokamak where the poloidal field becomes small. The model problem is described by a horizontal slot with a vertical magnetic field which plays the role of the poloidal field. Line-tying boundary conditions are applied at the planes defining the slot. A toroidal field lying parallel to the planes is assumed to be very strong, thereby constraining the possible structure of the perturbations. Axisymmetric perturbations which leave the toroidal field unperturbed are analyzed. Ideal magnetohydrodynamics is used, and the instability threshold is determined by the energy principle. Because of the boundary conditions, the Euler equation is, in general, non-separable except at marginal stability. This problem may be useful in understanding the source of heat transport into the private flux region in a snowflake divertor which possesses a large region of small poloidal field, and for code benchmarking as it yields simple analytic results in an interesting geometry. (C) 2013 AIP Publishing LLC.
C1 [Farmer, W. A.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
[Farmer, W. A.; Ryutov, D. D.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Farmer, WA (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX This work was performed under the auspices of the U.S. Department of
Energy by Lawrence Livermore National Laboratory under Contract No.
DE-AC52-07NA27344.
NR 21
TC 5
Z9 5
U1 1
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 2013
VL 20
IS 9
AR 092117
DI 10.1063/1.4821983
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 231FE
UT WOS:000325399400019
ER
PT J
AU Ferron, JR
Holcomb, CT
Luce, TC
Park, JM
Politzer, PA
Turco, F
Heidbrink, WW
Doyle, EJ
Hanson, JM
Hyatt, AW
In, Y
La Haye, RJ
Lanctot, MJ
Okabayashi, M
Petrie, TW
Petty, CC
Zeng, L
AF Ferron, J. R.
Holcomb, C. T.
Luce, T. C.
Park, J. M.
Politzer, P. A.
Turco, F.
Heidbrink, W. W.
Doyle, E. J.
Hanson, J. M.
Hyatt, A. W.
In, Y.
La Haye, R. J.
Lanctot, M. J.
Okabayashi, M.
Petrie, T. W.
Petty, C. C.
Zeng, L.
TI Progress toward fully noninductive discharge operation in DIII-D using
off-axis neutral beam injection
SO PHYSICS OF PLASMAS
LA English
DT Article
ID ADVANCED TOKAMAK; HIGH-BETA; MHD STABILITY; OPTIMIZATION; CONFINEMENT;
TRANSPORT; EQUILIBRIA; PLASMAS; PROFILE; SHEAR
AB The initial experiments on off-axis neutral beam injection into high noninductive current fraction (f(NI)), high normalized pressure (beta(N)) discharges in DIII-D [J. L. Luxon, Fusion Sci. Technol. 48, 828 (2005)] have demonstrated changes in the plasma profiles that increase the limits to plasma pressure from ideal low-n instabilities. The current profile is broadened and the minimum value of the safety factor (q(min)) can be maintained above 2 where the profile of the thermal component of the plasma pressure is found to be broader. The off-axis neutral beam injection results in a broadening of the fast-ion pressure profile. Confinement of the thermal component of the plasma is consistent with the IPB98(y,2) scaling, but global confinement with q(min) > 2 is below the ITER-89P scaling, apparently as a result of enhanced transport of fast ions. A 0-D model is used to examine the parameter space for f(NI) = 1 operation and project the requirements for high performance steady-state discharges. Fully noninductive solutions are found with 4 < beta(N) < 5 and bootstrap current fraction near 0.5 for a weak shear safety factor profile. A 1-D model is used to show that a f(NI) = 1 discharge at the top of this range of beta(N) that is predicted stable to n = 1, 2, and 3 ideal MHD instabilities is accessible through further broadening of the current and pressure profiles with off-axis neutral beam injection and electron cyclotron current drive. (C) 2013 AIP Publishing LLC.
C1 [Ferron, J. R.; Luce, T. C.; Politzer, P. A.; Hyatt, A. W.; La Haye, R. J.; Lanctot, M. J.; Petrie, T. W.; Petty, C. C.] Gen Atom Co, San Diego, CA 92186 USA.
[Holcomb, C. T.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Park, J. M.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Turco, F.; Hanson, J. M.] Columbia Univ, New York, NY 10027 USA.
[Heidbrink, W. W.] Univ Calif Irvine, Irvine, CA 92697 USA.
[Doyle, E. J.; Zeng, L.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[In, Y.] FAR TECH Inc, San Diego, CA 92121 USA.
[Okabayashi, M.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Ferron, JR (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA.
EM ferron@fusion.gat.com
RI Lanctot, Matthew J/O-4979-2016
OI Lanctot, Matthew J/0000-0002-7396-3372
FU US Department of Energy [DE-FC02-04ER54698, DE-AC52-07NA27344,
DE-AC05-00OR22725, DE-FG02-04ER54761, SC-G903402, DE-FG02-08ER54984,
DE-FG02-06ER84442, DE-AC02-09CH11466]
FX This work was supported in part by the US Department of Energy under
DE-FC02-04ER54698, DE-AC52-07NA27344, DE-AC05-00OR22725,
DE-FG02-04ER54761, SC-G903402, DE-FG02-08ER54984, DE-FG02-06ER84442, and
DE-AC02-09CH11466.
NR 42
TC 10
Z9 10
U1 0
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 2013
VL 20
IS 9
AR 092504
DI 10.1063/1.4821072
PG 13
WC Physics, Fluids & Plasmas
SC Physics
GA 231FE
UT WOS:000325399400042
ER
PT J
AU Haines, BM
Grinstein, FF
Welser-Sherrill, L
Fincke, JR
Doss, FW
AF Haines, Brian M.
Grinstein, Fernando F.
Welser-Sherrill, Leslie
Fincke, James R.
Doss, Forrest W.
TI Simulation ensemble for a laser-driven shear experiment
SO PHYSICS OF PLASMAS
LA English
DT Article
ID TURBULENT FLOWS; TRANSITION; TAYLOR; VORTEX
AB We perform an ensemble of simulations of a laser-driven shear experiment [L. Welser-Sherrill et al., "Two laser-driven mix experiments to study reshock and shear,"High Energy Density Phys. J. 9(3), 496-499 (2013)] in the strong-shock high energy-density regime to better understand material mixing driven by the Kelvin-Helmholtz instability. Each simulation uses a different realization of random initial interface perturbations based on data from targets used in experiments. Validation of the simulations is based on direct comparison of simulation and radiographic data. Simulations are also compared with published direct numerical simulation and the theory of homogeneous isotropic turbulence. Despite the fact that the flow is neither homogeneous, isotropic, nor fully turbulent, there are local regions in which the flow demonstrates characteristics of homogeneous isotropic turbulence. Our analysis shows characteristics consistent with those of incompressible isotropic turbulence. Our results show that turbulent features are present both near the shock front and in a separated region in the wake of the shock. These features develop and decay at different rates. Finally, we use the ensemble of three-dimensional simulations to test the performance of two-dimensional Reynolds-averaged Navier-Stokes simulations. In this context, we also test a presumed probability density function turbulent mixing model extensively used in combustion applications. (C) 2013 AIP Publishing LLC.
C1 [Haines, Brian M.; Grinstein, Fernando F.; Welser-Sherrill, Leslie; Fincke, James R.; Doss, Forrest W.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Haines, BM (reprint author), Los Alamos Natl Lab, MS T087, Los Alamos, NM 87545 USA.
OI Haines, Brian/0000-0002-3889-7074
NR 31
TC 5
Z9 5
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 2013
VL 20
IS 9
AR 092301
DI 10.1063/1.4820768
PG 15
WC Physics, Fluids & Plasmas
SC Physics
GA 231FE
UT WOS:000325399400029
ER
PT J
AU Hooper, EB
Sovinec, CR
Raman, R
Ebrahimi, F
Menard, JE
AF Hooper, E. B.
Sovinec, C. R.
Raman, R.
Ebrahimi, F.
Menard, J. E.
TI Resistive magnetohydrodynamic simulations of helicity-injected startup
plasmas in National Spherical Torus eXperiment
SO PHYSICS OF PLASMAS
LA English
DT Article
ID CURRENT DRIVE EXPERIMENTS
AB The generation of helicity-injected startup plasmas in National Spherical Torus eXperiment (NSTX), including flux surface closure, is studied using resistive-magnetohydrodynamic simulations with plasma flows, currents, ohmic heating and anisotropic thermal conduction. An injection-voltage pulse shape is used that separates the injection and closure phases allowing elucidation of the physics. The formation of an X-point near the helicity-injection gap is triggered as the injector voltage drops to zero. Near the forming X-point, magnetic pressure due to toroidal field entrained in the E x B plasma flow from the helicity-injection gap drops, allowing resistive magnetic reconnection even though the total injected current is almost constant. Where appropriate, the simulations are compared with Transient Coaxial Helicity Injection experiments in the NSTX spherical tokamak, which have demonstrated the formation of a promising candidate for non-inductive startup plasmas [Raman et al., Phys. Rev. Lett. 90, 075005 (2003)]. (C) 2013 AIP Publishing LLC.
C1 [Hooper, E. B.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Sovinec, C. R.] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA.
[Raman, R.] Univ Washington, Dept Aeronaut & Astronaut, Seattle, WA 98195 USA.
[Ebrahimi, F.] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
[Ebrahimi, F.; Menard, J. E.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Hooper, EB (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
OI Menard, Jonathan/0000-0003-1292-3286; Ebrahimi,
Fatima/0000-0003-3109-5367
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; PSI Center (University of Wisconsin)
[DE-FC02-05ER54813]; University of Washington [DE-FG02-99ER54519 AM08];
University of New Hampshire [DE-FG02-12ER55115]; Princeton Plasma
Physics Laboratory [DE-AC02-09CH11466]; Office of Science of the U.S.
Department of Energy [DE-AC02-05CH11231]
FX We thank W. H. Meyer for computational support at LLNL. S. M. Kaye's
detailed comments on the manuscript greatly improved its clarity. This
work was performed under the auspices of the U.S. Department of Energy
by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344, by the PSI Center (University of Wisconsin) under
Grant DE-FC02-05ER54813, by the University of Washington under Grant
DE-FG02-99ER54519 AM08, by the University of New Hampshire under Grant
DE-FG02-12ER55115 and by Princeton Plasma Physics Laboratory under
Contract DE-AC02-09CH11466. Some simulations used resources of the
National Energy Research Scientific Computing Center, which was
supported by the Office of Science of the U.S. Department of Energy
under Contract No. DE-AC02-05CH11231.
NR 22
TC 6
Z9 6
U1 1
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 2013
VL 20
IS 9
AR 092510
DI 10.1063/1.4821977
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 231FE
UT WOS:000325399400048
ER
PT J
AU Olson, RE
Leeper, RJ
AF Olson, R. E.
Leeper, R. J.
TI Alternative hot spot formation techniques using liquid deuterium-tritium
layer inertial confinement fusion capsules
SO PHYSICS OF PLASMAS
LA English
DT Article
ID IGNITION
AB The baseline DT ice layer inertial confinement fusion (ICF) ignition capsule design requires a hot spot convergence ratio of similar to 34 with a hot spot that is formed from DT mass originally residing in a very thin layer at the inner DT ice surface. In the present paper, we propose alternative ICF capsule designs in which the hot spot is formed mostly or entirely from mass originating within a spherical volume of DT vapor. Simulations of the implosion and hot spot formation in two DT liquid layer ICF capsule concepts-the DT wetted hydrocarbon (CH) foam concept and the "fast formed liquid" (FFL) concept-are described and compared to simulations of standard DT ice layer capsules. 1D simulations are used to compare the drive requirements, the optimal shock timing, the radial dependence of hot spot specific energy gain, and the hot spot convergence ratio in low vapor pressure (DT ice) and high vapor pressure (DT liquid) capsules. 2D simulations are used to compare the relative sensitivities to low-mode x-ray flux asymmetries in the DT ice and DT liquid capsules. It is found that the overall thermonuclear yields predicted for DT liquid layer capsules are less than yields predicted for DT ice layer capsules in simulations using comparable capsule size and absorbed energy. However, the wetted foam and FFL designs allow for flexibility in hot spot convergence ratio through the adjustment of the initial cryogenic capsule temperature and, hence, DT vapor density, with a potentially improved robustness to low-mode x-ray flux asymmetry. (C) 2013 AIP Publishing LLC.
C1 [Olson, R. E.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Leeper, R. J.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Olson, RE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
FU U. S. Department of Energy by LANL [DE-AC52-06NA25396]; U.S. Department
of Energy [DE-AC04-94AL85000]
FX We thank N. Meezan (LLNL) and J. Salmonson (LLNL) for supplying
information related to the baseline Hydra simulation. We thank D.
Montgomery (LANL) for suggesting that the FFL concept be applied to the
melting of a pure DT ice layer. We thank S. Weber (LLNL) for advice on
the setup of 2D multimode simulations. This work was performed under the
auspices of the U. S. Department of Energy by LANL under contract
DE-AC52-06NA25396. Sandia is a multiprogram laboratory operated by the
Sandia Corporation, a Lockheed-Martin Company, for the U.S. Department
of Energy under Contract DE-AC04-94AL85000.
NR 20
TC 10
Z9 10
U1 0
U2 18
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 2013
VL 20
IS 9
AR 092705
DI 10.1063/1.4822342
PG 12
WC Physics, Fluids & Plasmas
SC Physics
GA 231FE
UT WOS:000325399400055
ER
PT J
AU Ryutov, DD
Umansky, MV
AF Ryutov, D. D.
Umansky, M. V.
TI Divertor with a third-order null of the poloidal field
SO PHYSICS OF PLASMAS
LA English
DT Article
AB A concept and preliminary feasibility analysis of a divertor with the third-order poloidal field null is presented. The third-order null is the point where not only the field itself but also its first and second spatial derivatives are zero. In this case, the separatrix near the null-point has eight branches, and the number of strike-points increases from 2 (as in the standard divertor) to six. It is shown that this magnetic configuration can be created by a proper adjustment of the currents in a set of three divertor coils. If the currents are somewhat different from the required values, the configuration becomes that of three closely spaced first-order nulls. Analytic approach, suitable for a quick orientation in the problem, is used. Potential advantages and disadvantages of this configuration are briefly discussed. (C) 2013 AIP Publishing LLC.
C1 [Ryutov, D. D.; Umansky, M. V.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Ryutov, DD (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
FU U.S. Department of Energy by Lawrence Livermore National Security, LLC,
Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
FX This work was performed under the auspices of the U.S. Department of
Energy by Lawrence Livermore National Security, LLC, Lawrence Livermore
National Laboratory, under Contract DE-AC52-07NA27344.
NR 20
TC 5
Z9 5
U1 0
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 2013
VL 20
IS 9
AR 092509
DI 10.1063/1.4821603
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 231FE
UT WOS:000325399400047
ER
PT J
AU Shin, YM
Church, M
AF Shin, Young-Min
Church, Michael
TI Integrated system modeling analysis of a cryogenic multi-cell
deflecting-mode cavity resonator
SO PHYSICS OF PLASMAS
LA English
DT Article
AB A deflecting mode cavity is the integral element for six-dimensional phase-space beam control in bunch compressors and emittance transformers at high energy beam test facilities. RF performance of a high-Q device is, however, highly sensitive to operational conditions, in particular in a cryo-cooling environment. Using analytic calculations and RF simulations, we examined cavity parameters and deflecting characteristics of TM110,pi mode of a 5 cell resonator in a liquid nitrogen cryostat, which has long been used at the Fermilab A0 Photoinjector (A0PI). The sensitivity analysis indicated that the cavity could lose 30%-40% of deflecting force due to defective input power coupling accompanying non-uniform field distribution across the cells with 40 similar to 50 MeV electron beam and 70-80 kW klystron power. Vacuum-cryomodules of the 5 cell cavity are planned to be installed at the Fermilab Advanced Superconducting Test Accelerator facility. Comprehensive modeling analysis integrated with multi-physics simulation tools showed that RF loading of 1 ms can cause a similar to 5 K maximum temperature increase, corresponding to a similar to 4.3 mu m/ms deformation and a 1.32 MHz/K maximum frequency shift. The integrated system modeling analysis will improve design process of a high-Q cavity with more accurate prediction of cryogenic RF performance under a high power pulse operation. (C) 2013 AIP Publishing LLC.
C1 [Shin, Young-Min] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
[Shin, Young-Min; Church, Michael] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Shin, YM (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
EM yshin@niu.edu
FU Fermi Research Alliance, LLC under the U.S. Department of Energy
FX The work was supported by the Fermi Research Alliance, LLC under the
U.S. Department of Energy.
NR 17
TC 0
Z9 0
U1 0
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 2013
VL 20
IS 9
AR 093101
DI 10.1063/1.4820773
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 231FE
UT WOS:000325399400060
ER
PT J
AU Stoltzfus-Dueck, T
Scott, BD
Krommes, JA
AF Stoltzfus-Dueck, T.
Scott, B. D.
Krommes, J. A.
TI Nonadiabatic electron response in the Hasegawa-Wakatani equations (vol
20, 082314, 2013)
SO PHYSICS OF PLASMAS
LA English
DT Correction
C1 [Stoltzfus-Dueck, T.] EURATOM, Teilinst Greifswald, Max Planck Inst Plasmaphys, D-17491 Greifswald, Germany.
[Scott, B. D.] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany.
[Krommes, J. A.] Princeton Univ, PPPL, Princeton, NJ 08543 USA.
RP Stoltzfus-Dueck, T (reprint author), EURATOM, Teilinst Greifswald, Max Planck Inst Plasmaphys, Wendelsteinstr 1, D-17491 Greifswald, Germany.
EM tstoltzf@ipp.mpg.de
NR 1
TC 0
Z9 0
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 2013
VL 20
IS 9
AR 099901
DI 10.1063/1.4821820
PG 1
WC Physics, Fluids & Plasmas
SC Physics
GA 231FE
UT WOS:000325399400088
ER
PT J
AU Wang, G
Peebles, WA
Rhodes, TL
Austin, ME
Yan, Z
McKee, GR
La Haye, RJ
Burrell, KH
Doyle, EJ
Hillesheim, JC
Lanctot, MJ
Nazikian, R
Petty, CC
Schmitz, L
Smith, S
Strait, EJ
Van Zeeland, M
Zeng, L
AF Wang, G.
Peebles, W. A.
Rhodes, T. L.
Austin, M. E.
Yan, Z.
McKee, G. R.
La Haye, R. J.
Burrell, K. H.
Doyle, E. J.
Hillesheim, J. C.
Lanctot, M. J.
Nazikian, R.
Petty, C. C.
Schmitz, L.
Smith, S.
Strait, E. J.
Van Zeeland, M.
Zeng, L.
TI Multi-field characteristics and eigenmode spatial structure of geodesic
acoustic modes in DIII-D L-mode plasmas
SO PHYSICS OF PLASMAS
LA English
DT Article
ID ZONAL FLOWS; D TOKAMAK; TOROIDAL PLASMAS; OSCILLATIONS; EXCITATION;
UPGRADE
AB The geodesic acoustic mode (GAM), a coherent form of the zonal flow, plays a critical role in turbulence regulation and cross-magnetic-field transport. In the DIII-D tokamak, unique information on multi-field characteristics and radial structure of eigenmode GAMs has been measured. Two simultaneous and distinct, radially overlapping eigenmode GAMs (i.e., constant frequency vs. radius) have been observed in the poloidal E X B flow in L-mode plasmas. As the plasma transitions from an L-mode to an Ohmic regime, one of these eigenmode GAMs becomes a continuum GAM (frequency responds to local parameters), while the second decays below the noise level. The eigenmode GAMs occupy a radial range of rho = 0.6-0.8 and 0.75-0.95, respectively. In addition, oscillations at the GAM frequency are observed for the first time in multiple plasma parameters, including n(e), T-e, and B-theta. The magnitude of T-e/T-e Te at the GAM frequency (the magnitude is similar to that of n(e)/n(e)) and measured n(e)-T-e cross-phase (similar to 140 degrees at the GAM frequency) together indicate that the GAM pressure perturbation is not determined solely by n(e). The magnetic GAM behavior, a feature only rarely reported, is significantly stronger (X 18) on the high-field side of the tokamak, suggesting an anti-ballooning nature. Finally, the GAM is also observed to directly modify intermediate-wavenumber n(e) levels (k rho(s) similar to 1.1). The simultaneous temperature, density, flow fluctuations, density-temperature cross-phase, and magnetic behavior present a new perspective on the underlying physics of the GAM. (C) 2013 AIP Publishing LLC.
C1 [Wang, G.; Peebles, W. A.; Rhodes, T. L.; Doyle, E. J.; Hillesheim, J. C.; Schmitz, L.; Zeng, L.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
[Wang, G.; Peebles, W. A.; Rhodes, T. L.; Doyle, E. J.; Hillesheim, J. C.; Schmitz, L.; Zeng, L.] Univ Calif Los Angeles, PSTI, Los Angeles, CA 90095 USA.
[Austin, M. E.] Univ Texas Austin, Austin, TX 78712 USA.
[Yan, Z.; McKee, G. R.] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA.
[La Haye, R. J.; Burrell, K. H.; Lanctot, M. J.; Petty, C. C.; Smith, S.; Strait, E. J.; Van Zeeland, M.] Gen Atom Co, San Diego, CA 92186 USA.
[Nazikian, R.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Wang, G (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
RI Lanctot, Matthew J/O-4979-2016
OI Lanctot, Matthew J/0000-0002-7396-3372
FU U.S. Department of Energy [DE-FG02-08ER54984, DE-FG03-97ER54415,
DE-FG02-89ER53296, DE-FG02-08ER54999, DE-FC02-04ER54698,
DE-AC02-09CH11466]
FX One of the authors (G. W.) would like to thank Dr. P. B. Snyder and Dr.
S.J. Zweben for useful conversations. This work supported in part by the
U. S. Department of Energy under DE-FG02-08ER54984, DE-FG03-97ER54415,
DE-FG02-89ER53296, DE-FG02-08ER54999, DE-FC02-04ER54698, and
DE-AC02-09CH11466.
NR 57
TC 13
Z9 13
U1 2
U2 20
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 2013
VL 20
IS 9
AR 092501
DI 10.1063/1.4819501
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 231FE
UT WOS:000325399400039
ER
PT J
AU Zheng, J
Qin, H
AF Zheng, Jian
Qin, Hong
TI On the singularity of the Vlasov-Poisson system
SO PHYSICS OF PLASMAS
LA English
DT Article
ID PLASMA-OSCILLATIONS
AB The Vlasov-Poisson system can be viewed as the collisionless limit of the corresponding Fokker-Planck-Poisson system. It is reasonable to expect that the result of Landau damping can also be obtained from the Fokker-Planck-Poisson system when the collision frequency nu approaches zero. However, we show that the collisionless Vlasov-Poisson system is a singular limit of the collisional Fokker-Planck-Poisson system, and Landau's result can be recovered only as the nu approaches zero from the positive side. (C) 2013 AIP Publishing LLC.
C1 [Zheng, Jian; Qin, Hong] Univ Sci & Technol China, CAS Key Lab Basic Plasma Phys, Hefei 230026, Anhui, Peoples R China.
[Zheng, Jian; Qin, Hong] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China.
[Qin, Hong] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08550 USA.
RP Zheng, J (reprint author), Univ Sci & Technol China, CAS Key Lab Basic Plasma Phys, Hefei 230026, Anhui, Peoples R China.
FU Natural Science Foundation of China [11175179, 11075162]; ITER-China
Program [2010GB107001, 2011GB106001]; Ministry of Education [IRT1190]
FX The authors are grateful to the anonymous referee for the suggestion of
the initial-value problem, and to Chang Liu and Yao Zhou for their
discussions. This work was supported by the Natural Science Foundation
of China (Grant Nos. 11175179 and 11075162), ITER-China Program
(2010GB107001 and 2011GB106001), and Ministry of Education (Grant No.
IRT1190).
NR 12
TC 4
Z9 5
U1 1
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1070-664X
EI 1089-7674
J9 PHYS PLASMAS
JI Phys. Plasmas
PD SEP
PY 2013
VL 20
IS 9
AR 092114
DI 10.1063/1.4821831
PG 5
WC Physics, Fluids & Plasmas
SC Physics
GA 231FE
UT WOS:000325399400016
ER
PT J
AU Pankratov, V
Popov, AI
Shirmane, L
Kotlov, A
Bizarri, GA
Burger, A
Bhattacharya, P
Tupitsyn, E
Rowe, E
Buliga, VM
Williams, RT
AF Pankratov, V.
Popov, A. I.
Shirmane, L.
Kotlov, A.
Bizarri, G. A.
Burger, A.
Bhattacharya, P.
Tupitsyn, E.
Rowe, E.
Buliga, V. M.
Williams, R. T.
TI Luminescence and ultraviolet excitation spectroscopy of SrI2 and
SrI2:Eu2+
SO RADIATION MEASUREMENTS
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Luminescence Detectors and Transformers
of Ionizing Radiation (LUMDETR)
CY SEP 10-14, 2012
CL Martin Luther Univ Halle Wittenberg, Halle, GERMANY
SP Ctr Innovat Competence SiLi Nano
HO Martin Luther Univ Halle Wittenberg
DE Strontium iodide; Excitation spectroscopy; Luminescence; Synchrotron
radiation
ID 2-PHOTON SPECTROSCOPY; SCINTILLATORS; CRYSTALS; SPECTRA
AB We report measurements of luminescence and its ultraviolet excitation spectra in SrI2 and SrI2:Eu2+ at temperatures of 10 and 300 K. Attention is focused on determining the exciton energy and its temperature shift from features of the excitation spectra and limits placed by absorption spectroscopy on a 120 mu m thin crystal, on observation of a broadened Eu emission band attributed to trace Eu associated with oxygen in nominally undoped crystals, and on adding observations concerning the 3.4 eV band at low temperature attributed by Pustovarov et al. to the self-trapped exciton. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Pankratov, V.; Popov, A. I.; Shirmane, L.] Latvian State Univ, Inst Solid State Phys, LV-1063 Riga, Latvia.
[Kotlov, A.] DESY, HASYLAB, D-22607 Hamburg, Germany.
[Bizarri, G. A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Burger, A.; Bhattacharya, P.; Tupitsyn, E.; Rowe, E.; Buliga, V. M.] Fisk Univ, Dept Life & Phys Sci, Nashville, TN 37208 USA.
[Williams, R. T.] Wake Forest Univ, Dept Phys, Winston Salem, NC 27109 USA.
[Pankratov, V.] Univ Oulu, Dept Phys, FIN-90014 Oulu, Finland.
RP Pankratov, V (reprint author), Latvian State Univ, Inst Solid State Phys, 8 Kengaraga, LV-1063 Riga, Latvia.
EM vpank@latnet.lv; williams@wfu.edu
RI Popov, Anatoli /E-8828-2010; Kotlov, Aleksei/G-5182-2014; Pankratov,
Vladimir/B-8013-2011; Dep Theor Physics, Computer Modeling/E-6336-2013
OI Popov, Anatoli /0000-0003-2795-9361; Pankratov,
Vladimir/0000-0001-6233-8195;
NR 21
TC 24
Z9 24
U1 3
U2 21
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1350-4487
J9 RADIAT MEAS
JI Radiat. Meas.
PD SEP
PY 2013
VL 56
SI SI
BP 13
EP 17
DI 10.1016/j.radmeas.2013.02.022
PG 5
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 234VC
UT WOS:000325671400004
ER
PT J
AU Ehlers, G
Stewart, JR
Wildes, AR
Deen, PP
Andersen, KH
AF Ehlers, G.
Stewart, J. R.
Wildes, A. R.
Deen, P. P.
Andersen, K. H.
TI Generalization of the classical xyz-polarization analysis technique to
out-of-plane and inelastic scattering
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID NEUTRON POLARIZATION; MAGNETIC SCATTERING; SLOW-NEUTRONS; MULTIDETECTOR;
SPECTROMETER
AB The technique of longitudinal ("xyz") polarization analysis has been used successfully for many years to study disordered magnetic materials in thermal and cold neutron diffraction experiments. The technique allows the simultaneous and unambiguous separation of the nuclear, magnetic, and nuclear spin-incoherent contributions to the scattering. The technical advances seen in recent years, such as the availability of polarized He-3 analyzer cells to cover a large detector solid angle, the ability to detect out-of-plane scattering in a multi-detector, and a significant increase of the usable beam divergence, call for a generalization of the method. A general treatment of the formalism for carrying out neutron polarization analysis will be given in this paper, which describes a possible method of usage at a future, modern diffractometer or inelastic spectrometer with large area multi-detector coverage. (C) 2013 AIP Publishing LLC.
C1 [Ehlers, G.] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA.
[Stewart, J. R.] Rutherford Appleton Lab, ISIS, Didcot OX11 0QX, Oxon, England.
[Wildes, A. R.] Inst Laue Langevin, F-38042 Grenoble, France.
[Deen, P. P.; Andersen, K. H.] European Spallat Source ESS AB, S-22100 Lund, Sweden.
RP Ehlers, G (reprint author), Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA.
RI Stewart, Ross/C-4194-2008; Ehlers, Georg/B-5412-2008
OI Stewart, Ross/0000-0003-0053-0178; Ehlers, Georg/0000-0003-3513-508X
FU Scientific User Facilities Division, Office of Basic Energy Sciences,
U.S. Department of Energy
FX The authors thank the ILL for the use of the D7 spectrometer. G.E.
acknowledges funding by the Scientific User Facilities Division, Office
of Basic Energy Sciences, U.S. Department of Energy.
NR 25
TC 6
Z9 6
U1 1
U2 17
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD SEP
PY 2013
VL 84
IS 9
AR 093901
DI 10.1063/1.4819739
PG 8
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 231FX
UT WOS:000325402000027
PM 24089835
ER
PT J
AU Gotlieb, K
Hussain, Z
Bostwick, A
Lanzara, A
Jozwiak, C
AF Gotlieb, K.
Hussain, Z.
Bostwick, A.
Lanzara, A.
Jozwiak, C.
TI Rapid high-resolution spin- and angle-resolved photoemission
spectroscopy with pulsed laser source and time-of-flight spectrometer
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID TUNABLE TOPOLOGICAL INSULATOR; DEPENDENT ELECTRON DYNAMICS; 2-PHOTON
PHOTOEMISSION; POLARIZATION; TEXTURE; PHASE; POLARIMETER; SCATTERING;
TRANSPORT; FILTER
AB A high-efficiency spin- and angle-resolved photoemission spectroscopy (spin-ARPES) spectrometer is coupled with a laboratory-based laser for rapid high-resolution measurements. The spectrometer combines time-of-flight (TOF) energy measurements with low-energy exchange scattering spin polarimetry for high detection efficiencies. Samples are irradiated with fourth harmonic photons generated from a cavity-dumped Ti:sapphire laser that provides high photon flux in a narrow bandwidth, with a pulse timing structure ideally matched to the needs of the TOF spectrometer. The overall efficiency of the combined system results in near-E-F spin-resolved ARPES measurements with an unprecedented combination of energy resolution and acquisition speed. This allows high-resolution spin measurements with a large number of data points spanning multiple dimensions of interest (energy, momentum, photon polarization, etc.) and thus enables experiments not otherwise possible. The system is demonstrated with spin-resolved energy and momentum mapping of the L-gap Au(111) surface states, a prototypical Rashba system. The successful integration of the spectrometer with the pulsed laser system demonstrates its potential for simultaneous spin- and time-resolved ARPES with pump-probe based measurements. (C) 2013 AIP Publishing LLC.
C1 [Gotlieb, K.] Univ Calif Berkeley, Grad Grp Appl Sci & Technol, Berkeley, CA 94720 USA.
[Hussain, Z.; Bostwick, A.; Jozwiak, C.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
[Lanzara, A.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Lanzara, A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Gotlieb, K (reprint author), Univ Calif Berkeley, Grad Grp Appl Sci & Technol, Berkeley, CA 94720 USA.
EM zhussain@lbl.gov; alanzara@lbl.gov; cmjozwiak@lbl.gov
FU Office of Science, Office of Basic Energy Sciences, Materials Sciences
and Engineering Division, of the U.S. Department of Energy (DOE)
[DE-AC02-05CH11231]; Advanced Light Source, Lawrence Berkeley National
Laboratory; Office of Science, Office of Basic Energy Sciences, of the
U.S. Department of Energy [DE-AC02-05CH11231]; National Science
Foundation (NSF) [DGE 1106400]
FX This work was supported by the Director, Office of Science, Office of
Basic Energy Sciences, Materials Sciences and Engineering Division, of
the U.S. Department of Energy (DOE) under Contract No.
DE-AC02-05CH11231. The work was also supported by the Advanced Light
Source, Lawrence Berkeley National Laboratory, which is supported by the
Director, Office of Science, Office of Basic Energy Sciences, of the
U.S. Department of Energy under Contract No. DE-AC02-05CH11231. One of
the researchers (K.G.) was supported by a fellowship from the National
Science Foundation (NSF) under Grant No. DGE 1106400.
NR 85
TC 5
Z9 5
U1 3
U2 59
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD SEP
PY 2013
VL 84
IS 9
AR 093904
DI 10.1063/1.4821247
PG 5
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 231FX
UT WOS:000325402000030
PM 24089838
ER
PT J
AU Graham, KS
Joyce, JJ
Durakiewicz, T
AF Graham, Kevin S.
Joyce, John J.
Durakiewicz, Tomasz
TI Integrated experimental setup for angle resolved photoemission
spectroscopy of transuranic materials
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID PHOTOELECTRON-SPECTROSCOPY; ELECTRONIC-STRUCTURE; RESONANT
PHOTOEMISSION; F-ELECTRONS; THIN-FILMS; DISPERSION; PU; LOCALIZATION;
TRANSITION; PLUTONIUM
AB We have developed the Angle Resolved Photoemission Spectroscopy (ARPES) system for transuranic materials. The ARPES transuranic system is an endstation upgrade to the Laser Plasma Light Source (LPLS) at Los Alamos National Laboratory. The LPLS is a tunable light source for photoemission with a photon energy range covering the vacuum ultraviolet (VUV) and soft x-ray regions (27-140 eV). The LPLS was designed and developed for transuranic materials. Transuranic photoemission is currently not permitted at the public synchrotrons worldwide in the VUV energy range due to sample encapsulation requirements. With the addition of the ARPES capability to the LPLS system there is an excellent opportunity to explore new details centered on the electronic structure of actinide and transuranic materials. (C) 2013 AIP Publishing LLC.
C1 [Graham, Kevin S.; Joyce, John J.; Durakiewicz, Tomasz] Los Alamos Natl Lab, Mat Phys & Applicat Div, Condensed Matter & Magnet Sci Grp, Los Alamos, NM 87544 USA.
RP Graham, KS (reprint author), Los Alamos Natl Lab, Mat Phys & Applicat Div, Condensed Matter & Magnet Sci Grp, POB 1663, Los Alamos, NM 87544 USA.
EM tomasz@lanl.gov
FU U.S. Department of Energy, Office of Basic Energy Sciences, Division of
Materials Sciences and Engineering
FX This work was performed at Los Alamos National Laboratory under the
auspices of the U.S. Department of Energy, Office of Basic Energy
Sciences, Division of Materials Sciences and Engineering.
NR 40
TC 2
Z9 2
U1 1
U2 18
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD SEP
PY 2013
VL 84
IS 9
AR 093902
DI 10.1063/1.4820480
PG 7
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 231FX
UT WOS:000325402000028
PM 24089836
ER
PT J
AU Jenei, Z
Cynn, H
Visbeck, K
Evans, WJ
AF Jenei, Zsolt
Cynn, Hyunchae
Visbeck, Ken
Evans, William J.
TI High-temperature experiments using a resistively heated high-pressure
membrane diamond anvil cell
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID X-RAY-DIFFRACTION; RAMAN-SPECTROSCOPY; CARBON-DIOXIDE; MELTING CURVES;
PHASE; GPA; CALIBRATION; SENSORS; SYSTEM; H-2
AB We describe a reliable high performance resistive heating method developed for the membrane diamond anvil cell. This method generates homogenous high temperatures at high pressure in the whole sample for extended operation period. It relies on two mini coil heaters made of Pt-Rh alloy wire mounted around the diamond anvils and gasket, while temperature is monitored by two K-type thermocouples mounted near the sample. The sample, diamonds, and tungsten-carbide seats are thermally insulated from the piston and cylinder keeping the cell temperature below 750 K while the sample temperature is 1200 K. The cell with the heaters is placed in a vacuum oven to prevent oxidation and unnecessary heat loss. This assembly allows complete remote operation, ideally suited for experiments at synchrotron facilities. Capabilities of the setup are demonstrated for in situ Raman and synchrotron x-ray diffraction measurements. We show experimental measurements from isothermal compression at 900 K and 580 K to 100 GPa and 185 GPa, respectively, and quasi-isobaric compression at 95 GPa over 1000 K. (C) 2013 AIP Publishing LLC.
C1 [Jenei, Zsolt; Cynn, Hyunchae; Visbeck, Ken; Evans, William J.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Jenei, Z (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RI Jenei, Zsolt/B-3475-2011
FU U.S. DOE/NNSA Science Campaign-2; Department of Energy by Lawrence
Livermore National Laboratory [DE-AC52-07NA27344]; CIW; CDAC; UNLV;
LLNL; DOE-NNSA; DOE-BES [DE-AC02-06CH11357]; National Science Foundation
(NSF)
FX We thank Professor Dr. Choong-Shik Yoo at Washington State University
for insightful discussion on the heater development. We gratefully
acknowledge support from U.S. DOE/NNSA Science Campaign-2 (Program
Manager - Dr. Brad Wallin). This work was performed under the auspices
of the Department of Energy by Lawrence Livermore National Laboratory
under Contract No. DE-AC52-07NA27344. HPCAT is supported by CIW, CDAC,
UNLV, and LLNL through funding from DOE-NNSA, DOE-BES, and National
Science Foundation (NSF). APS is supported by DOE-BES, under Contract
No. DE-AC02-06CH11357.
NR 31
TC 7
Z9 7
U1 5
U2 37
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD SEP
PY 2013
VL 84
IS 9
AR 095114
DI 10.1063/1.4821622
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 231FX
UT WOS:000325402000065
PM 24089873
ER
PT J
AU Martin, JE
AF Martin, James E.
TI A resonant biaxial Helmholtz coil employing a fractal capacitor bank
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
AB The design and construction of a series resonant biaxial Helmholtz coil for the production of magnetic fields as large as 500 G in the range of 100-2500 Hz is described. Important aspects of ac coil design are discussed, including: minimizing power losses due to the expected Joule heating, self-induced eddy currents, and skin resistance; controlling the stray capacitance; maximizing field homogeneity; and keeping peak voltages at acceptable levels. The design and construction of a computer-controlled, optically isolated fractal capacitor bank is then treated, and various aspects of capacitor selection and characterization were discussed. The system performance is demonstrated, including stability and the possibility of field component dephasing with typical magnetic samples. (C) 2013 AIP Publishing LLC.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Martin, JE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
FU U.S. Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]; Division of Materials Science, Office of Basic
Energy Sciences, U.S. Department of Energy (DOE)
FX Sandia National Laboratories is a multi-program laboratory managed and
operated by Sandia Corporation, a wholly owned subsidiary of Lockheed
Martin Corporation, for the U.S. Department of Energy's National Nuclear
Security Administration under Contract No. DE-AC04-94AL85000. This work
was supported by the Division of Materials Science, Office of Basic
Energy Sciences, U.S. Department of Energy (DOE). The design of this
device benefited from discussions with R. A. Anderson. L. Shapnek
fabricated the capacitor banks, and designed the necessary safety
interlocks to ensure their safe operation.
NR 13
TC 6
Z9 6
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD SEP
PY 2013
VL 84
IS 9
AR 094704
DI 10.1063/1.4821878
PG 11
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 231FX
UT WOS:000325402000039
PM 24089847
ER
PT J
AU Tranter, RS
Lynch, PT
AF Tranter, R. S.
Lynch, P. T.
TI A miniature high repetition rate shock tube
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID SCATTERING
AB A miniature high repetition rate shock tube with excellent reproducibility has been constructed to facilitate high temperature, high pressure, gas phase experiments at facilities such as synchrotron light sources where space is limited and many experiments need to be averaged to obtain adequate signal levels. The shock tube is designed to generate reaction conditions of T > 600 K, P < 100 bars at a cycle rate of up to 4 Hz. The design of the apparatus is discussed in detail, and data are presented to demonstrate that well-formed shock waves with predictable characteristics are created, repeatably. Two synchrotron-based experiments using this apparatus are also briefly described here, demonstrating the potential of the shock tube for research at synchrotron light sources. (C) 2013 AIP Publishing LLC.
C1 [Tranter, R. S.; Lynch, P. T.] Argonne Natl Lab, Dept Chem Sci & Engn, Argonne, IL 60439 USA.
RP Tranter, RS (reprint author), Argonne Natl Lab, Dept Chem Sci & Engn, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM tranter@anl.gov
FU Division of Chemical Sciences, Geosciences, and Biosciences, the Office
of Basic Energy Sciences, the U.S. Department of Energy
[DE-AC02-2006CH11357]; U.S. Department of Energy, Office of Science,
Office of Basic Energy Sciences [DE-AC02-06CH11357]; Office of Science,
Office of Basic Energy Sciences, of the U.S. Department of Energy
[DE-AC02-05CH11231]; U.S. Department of Energy [W-31-109-ENG-38]
FX This work was supported by the Division of Chemical Sciences,
Geosciences, and Biosciences, the Office of Basic Energy Sciences, the
U.S. Department of Energy, under Contract No. DE-AC02-2006CH11357 as
part of the Argonne Sandia Consortium on High Pressure Combustion
Chemistry.; The XAS experiments were conducted at the 7-BM beamline of
the Advanced Photon Source at Argonne National Laboratory. We are
grateful to Alan L. Kastengren for his expertise in XAS. Use of the
Advanced Photon Source was supported by the U.S. Department of Energy,
Office of Science, Office of Basic Energy Sciences, under Contract No.
DE-AC02-06CH11357.; The VUV-TOF-MS studies were conducted at the
Chemical Dynamics beamline (9.0.2) and Musahid Ahmed kindly made his
TOF-MS endstation available to us. The Advanced Light Source is
supported by the Director, Office of Science, Office of Basic Energy
Sciences, of the U.S. Department of Energy under Contract No.
DE-AC02-05CH11231.; The article has been created by the University of
Chicago as Operator of Argonne National Laboratory ("Argonne") under
Contract No. W-31-109-ENG-38 with the U.S. Department of Energy. The
U.S. Government retains for itself, and others acting on its behalf, a
paid-up, nonexclusive, irrevocable worldwide license in said article to
reproduce, prepare derivative works, distribute copies to the public,
and perform publicly and display publicly, by or on behalf of the
Government.
NR 26
TC 7
Z9 7
U1 2
U2 32
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD SEP
PY 2013
VL 84
IS 9
AR 094102
DI 10.1063/1.4820917
PG 11
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 231FX
UT WOS:000325402000032
PM 24089840
ER
PT J
AU Frazer, NL
Schaller, RD
Ketterson, JB
AF Frazer, N. Laszlo
Schaller, Richard D.
Ketterson, J. B.
TI Unexpectedly slow two particle decay of ultra-dense excitons in cuprous
oxide
SO SOLID STATE COMMUNICATIONS
LA English
DT Article
DE Copper(I) oxide; Polaritons; Auger; Femtosecond laser
ID BOSE-EINSTEIN CONDENSATION; AUGER DECAY; MOLECULE FORMATION; CU2O;
POLARITONS; SUPERFLUIDITY; TRANSPORT; PARAEXCITONS; ABSORPTION;
TRANSITION
AB For an ultra-dense exciton gas in cuprous oxide (Cu2O), exciton-exciton interactions are the dominant cause of exciton decay. This study demonstrates that the accepted Auger recombination model overestimates the exciton decay rate following intense two photon excitation. Two exciton decay is relevant to the search for collective quantum behavior of excitons in bulk systems. These results suggest the existence of a new high density regime of exciton behavior. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Frazer, N. Laszlo; Ketterson, J. B.] Northwestern Univ, Dept Phys, Evanston, IL 60208 USA.
[Schaller, Richard D.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
[Schaller, Richard D.] Northwestern Univ, Dept Chem, Argonne, IL 60439 USA.
RP Frazer, NL (reprint author), Northwestern Univ, Dept Phys, 2145 Sheridan Rd, Evanston, IL 60208 USA.
EM ssc@laszlofrazer.com; schaller@anl.gov; j-ketterson@northwestern.edu
OI Frazer, Laszlo/0000-0003-3574-8003
FU MRSEC program of the National Science Foundation at the Materials
Research Center of Northwestern University [DMR-0520513]; U. S.
Department of Energy, Office of Science, Office of Basic Energy Sciences
[DE-AC02-06CH11357]; NSF IGERT [DGE-0801685]; Ryan Fellowship;
Northwestern University International Institute for Nanotechnology
FX We would like to thank Professor M. Grayson for helpful discussions.
This work made use of the J.B. Cohen X-Ray Diffraction Facility and OMM
Facility supported by the MRSEC program of the National Science
Foundation (DMR-0520513) at the Materials Research Center of
Northwestern University. Use of the Center for Nanoscale Materials was
supported by the U. S. Department of Energy, Office of Science, Office
of Basic Energy Sciences, under Contract no. DE-AC02-06CH11357. Support
was provided by NSF IGERT DGE-0801685. N.L.F. gratefully acknowledges
the support from the Ryan Fellowship and the Northwestern University
International Institute for Nanotechnology.
NR 42
TC 2
Z9 2
U1 0
U2 10
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-1098
J9 SOLID STATE COMMUN
JI Solid State Commun.
PD SEP
PY 2013
VL 170
BP 34
EP 38
DI 10.1016/j.ssc.2013.07.015
PG 5
WC Physics, Condensed Matter
SC Physics
GA 233UH
UT WOS:000325594500008
ER
PT J
AU Goulay, F
Schrader, PE
Lopez-Yglesias, X
Michelsen, HA
AF Goulay, Fabien
Schrader, Paul E.
Lopez-Yglesias, Xerxes
Michelsen, Hope A.
TI A data set for validation of models of laser-induced incandescence from
soot: temporal profiles of LII signal and particle temperature
SO APPLIED PHYSICS B-LASERS AND OPTICS
LA English
DT Article
ID POLYCYCLIC AROMATIC-HYDROCARBONS; TURBULENT-DIFFUSION FLAMES;
VOLUME-FRACTION; INDUCED FLUORESCENCE; OPTICAL DIAGNOSTICS; GENERATED
SOOT; ELEVATED-TEMPERATURES; NANOSECOND PULSES; REFRACTIVE-INDEX;
LAMINAR
AB We measured spectrally and temporally resolved laser-induced incandescence signals from flame-generated soot at laser fluences of 0.01-3.5 J/cm(2) and laser wavelengths of 532 and 1,064 nm. We recorded LII temporal profiles at 681.8 nm using a fast-gated detector and a spatially homogeneous and temporally smooth laser profile. Time-resolved emission spectra were used to identify and avoid spectral interferences and to infer soot temperatures. Soot temperatures reach a maximum of 4,415 +/- A 65 K at fluences a parts per thousand yen0.2 J/cm(2) at 532 nm and 4,424 +/- A 80 K at fluences a parts per thousand yen0.3 J/cm(2) at 1,064 nm. These temperatures are consistent with the sublimation temperature of C-2 of 4,456.59 K. At fluences above 0.5 J/cm(2) at 532 nm, the measured spectra yield an apparent higher temperature after the soot has fully vaporized but well within the laser pulse. This apparent temperature elevation at high fluence is explained by fluorescence interferences from molecules present in the flame. We also measured 3-color LII temporal profiles at detection wavelengths of 451.5, 681.8, and 854.8 nm. The temperatures inferred from these measurements agree well with those measured using spectrally resolved LII. The data discussed in this manuscript are archived as electronic supplementary material.
C1 [Goulay, Fabien; Schrader, Paul E.; Lopez-Yglesias, Xerxes; Michelsen, Hope A.] Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA.
RP Michelsen, HA (reprint author), Sandia Natl Labs, Combust Res Facil, MS 9055,POB 969, Livermore, CA 94551 USA.
EM hamiche@sandia.gov
FU Division of Chemical Sciences, Geosciences, and Biosciences, the Office
of Basic Energy Sciences, the US Department of Energy; National Nuclear
Security Administration [DE-AC04-94-AL85000]
FX We thank Laszlo Nemes for his valuable comments on the manuscript. We
also thank Daniel Strong for the rendition of the experimental setup
shown in Fig. 1. This work was supported by the Division of Chemical
Sciences, Geosciences, and Biosciences, the Office of Basic Energy
Sciences, the US Department of Energy. Sandia is a multi-program
laboratory operated by Sandia Corporation, a Lockheed Martin Company,
for the National Nuclear Security Administration under contract
DE-AC04-94-AL85000.
NR 79
TC 14
Z9 14
U1 2
U2 22
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0946-2171
EI 1432-0649
J9 APPL PHYS B-LASERS O
JI Appl. Phys. B-Lasers Opt.
PD SEP
PY 2013
VL 112
IS 3
BP 287
EP 306
DI 10.1007/s00340-013-5504-4
PG 20
WC Optics; Physics, Applied
SC Optics; Physics
GA 227GJ
UT WOS:000325099100002
ER
PT J
AU Bambha, RP
Dansson, MA
Schrader, PE
Michelsen, HA
AF Bambha, Ray P.
Dansson, Mark A.
Schrader, Paul E.
Michelsen, Hope A.
TI Effects of volatile coatings on the laser-induced incandescence of soot
SO APPLIED PHYSICS B-LASERS AND OPTICS
LA English
DT Article
ID ABSORPTION CROSS-SECTION; TURBULENT-DIFFUSION FLAMES; BLACK CARBON
MEASUREMENTS; LOW-FLUENCE LII; LIGHT-SCATTERING; OPTICAL-PROPERTIES;
MIXING STATE; WAVELENGTH DEPENDENCE; MOBILITY RELATIONSHIP; RADIATIVE
ABSORPTION
AB We have measured time-resolved laser-induced incandescence (LII) from combustion-generated mature soot extracted from a burner and (1) coated with oleic acid or (2) coated with oleic acid and then thermally denuded using a thermodenuder. The soot samples were size selected using a differential mobility analyzer and characterized with a scanning mobility particle sizer, centrifugal particle mass analyzer, and transmission electron microscope. The results demonstrate a strong influence of coatings on the magnitude and temporal evolution of the LII signal. For coated particles, higher laser fluences are required to reach signal levels comparable to those of uncoated particles. The peak LII curve is shifted to increasingly higher fluences with increasing coating thickness until this effect saturates at a coating thickness of similar to 75 % by mass. These effects are predominantly attributable to the additional energy needed to vaporize the coating while heating the particle. LII signals are higher and signal decay rates are significantly slower for thermally denuded particles relative to coated or uncoated particles, particularly at low and intermediate laser fluences. Our results suggest negligible coating enhancement in absorption cross-section for combustion-generated soot at the laser fluences used. Apparent enhancement in absorption with restructuring may be caused by less conductive cooling.
C1 [Bambha, Ray P.; Dansson, Mark A.; Schrader, Paul E.; Michelsen, Hope A.] Sandia Natl Labs, Combust Res Facil, Livermore, CA USA.
RP Michelsen, HA (reprint author), Sandia Natl Labs, Combust Res Facil, Livermore, CA USA.
EM hamiche@sandia.gov
FU Sandia Laboratory Directed Research and Development program; Division of
Chemical Sciences, Geosciences, and Biosciences, the Office of Basic
Energy Sciences, the US Department of Energy; National Nuclear Security
Administration [DE-AC04-94-AL85000]
FX We thank Daniel Strong for the renditions of the experimental setup
shown in Fig. 1. We are very grateful to Chris Sorensen for his advice
on analysis of the TEM images, Jeff Headrick for his assistance with the
TEM image analysis, and Alexei Khalizov for his insightful comments
about soot restructuring. This work was funded by the Sandia Laboratory
Directed Research and Development program. The TEM analysis, the
thermodenuder design, construction, and testing, and the CPMA were
funded by the Division of Chemical Sciences, Geosciences, and
Biosciences, the Office of Basic Energy Sciences, the US Department of
Energy. Sandia is a multi-program laboratory operated by Sandia
Corporation, a Lockheed Martin Company, for the National Nuclear
Security Administration under contract DE-AC04-94-AL85000.
NR 101
TC 10
Z9 10
U1 3
U2 25
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0946-2171
EI 1432-0649
J9 APPL PHYS B-LASERS O
JI Appl. Phys. B-Lasers Opt.
PD SEP
PY 2013
VL 112
IS 3
BP 343
EP 358
DI 10.1007/s00340-013-5463-9
PG 16
WC Optics; Physics, Applied
SC Optics; Physics
GA 227GJ
UT WOS:000325099100006
ER
PT J
AU Dutton, SM
Banks, D
Brunswick, SL
Fisk, WJ
AF Dutton, Spencer M.
Banks, David
Brunswick, Samuel L.
Fisk, William J.
TI Health and economic implications of natural ventilation in California
offices
SO BUILDING AND ENVIRONMENT
LA English
DT Article
DE Natural ventilation; Occupant health; Sick building syndrome; Exposure
model; Occupant exposure; PM2.5 ozone exposure
ID PARTICULATE AIR-POLLUTION; INDOOR AIR; OZONE; BUILDINGS; MORTALITY;
SYMPTOMS; ASSOCIATION; PERFORMANCE; CHEMISTRY; SINGAPORE
AB This study examines the human health implications of natural ventilation in California office buildings. We modeled work-time exposures using field data on indoor and outdoor ozone and particulate matter from four case studies in naturally ventilated offices and published data from mechanically ventilated offices. We also modeled the amount of time that windows would be open in the naturally ventilated office and used the results to estimate the difference in pollutant exposures for occupants of naturally ventilated versus mechanically ventilated, air-conditioned offices. Based on published concentration response equations, we estimated the incremental changes in health outcomes that resulted from the difference in exposures for occupants in the two types of offices. We also estimated the differences in sick building symptom rates based on symptom prevalence rates in naturally ventilated and air-conditioned offices. Finally, we developed first-order estimates of the health-related costs and benefits of retrofitting 10 percent of California's current office space to use natural ventilation. Findings included an increase in annual health-related costs from increased exposure to ozone and particulate matter of between $130 million and $207 million, and a reduction in sick building syndrome symptom costs, valued between $43 million and $11.5 million. Our estimates have a high degree of uncertainty and exclude potentially significant health-related costs and benefits of both naturally ventilated and air-conditioned buildings. Nonetheless, these estimates indicate that health-related costs of natural ventilation are significant and warrant further study. We also explore several mitigation options that could limit the health and economic impacts of natural ventilation. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Dutton, Spencer M.; Brunswick, Samuel L.; Fisk, William J.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Banks, David] CPP Wind Engn, Ft Collins, CO USA.
RP Dutton, SM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM smdutton@lbl.gov
FU California Energy Commission; Public Interest Energy Research Program;
Buildings End Use Energy Efficiency Program [500-10-025]; U.S.
Department of Energy [DE-AC03-765F00098]
FX This work was supported by the California Energy Commission, Public
Interest Energy Research Program, Buildings End Use Energy Efficiency
Program, Contract number 500-10-025, through the U.S. Department of
Energy under contract DE-AC03-765F00098. The authors would like to thank
Brad Meister of the California Energy Commission, George Loisos,
Frederic Haldi, and finally Ed Arens and Hui Zhang from the University
of California, Berkeley Center for the Built Environment.
NR 45
TC 10
Z9 10
U1 3
U2 35
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-1323
J9 BUILD ENVIRON
JI Build. Environ.
PD SEP
PY 2013
VL 67
BP 34
EP 45
DI 10.1016/j.buildenv.2013.05.002
PG 12
WC Construction & Building Technology; Engineering, Environmental;
Engineering, Civil
SC Construction & Building Technology; Engineering
GA 222GN
UT WOS:000324719300004
ER
PT J
AU Lorenzetti, DM
Dols, WS
Persily, AK
Sohn, MD
AF Lorenzetti, David M.
Dols, W. Stuart
Persily, Andrew K.
Sohn, Michael D.
TI A stiff, variable time step transport solver for CONTAM
SO BUILDING AND ENVIRONMENT
LA English
DT Article
DE Contaminant; Pollutant transport; Simulation; Buildings; CONTAM; CVODE
AB We describe the implementation of a new transport solver for CONTAM, a whole-building airflow and contaminant transport model developed by the National Institute of Standards and Technology. Based on CVODE, a general-purpose code for ordinary differential equations, the new solver features variable time steps, high-order integration methods, and automatic error control. These techniques can make CONTAM more accurate when simulating fast transport mechanisms such as high air change rates, sorption, and chemical reactions. We present the relevant theory, then describe the modeling decisions needed to integrate CVODE into CONTAM. Testing with two realistic building models shows that CVODE can run faster than the legacy solvers. Published by Elsevier Ltd.
C1 [Lorenzetti, David M.; Sohn, Michael D.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Dols, W. Stuart; Persily, Andrew K.] NIST, Gaithersburg, MD 20899 USA.
RP Lorenzetti, DM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd,MS 90-2002, Berkeley, CA 94720 USA.
EM dmlorenzetti@lbl.gov; william.dols@nist.gov; andrew.persily@nist.gov;
mdsohn@lbl.gov
OI Lorenzetti, David/0000-0002-9971-1165
FU Defense Threat Reduction Agency; U.S. Department of Energy
[DE-AC02-05CH11231]; Naval Surface Warfare Center Dahlgren; [MIPRs
N0017810MP00069]; [N0017810MP00160]
FX LBNL's research was funded in part by the Defense Threat Reduction
Agency, and performed under U.S. Department of Energy contract no.
DE-AC02-05CH11231. NIST was supported under MIPRs N0017810MP00069 and
N0017810MP00160, both funded by the Naval Surface Warfare Center
Dahlgren.
NR 11
TC 5
Z9 5
U1 0
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0360-1323
J9 BUILD ENVIRON
JI Build. Environ.
PD SEP
PY 2013
VL 67
BP 260
EP 264
DI 10.1016/j.buildenv.2013.05.008
PG 5
WC Construction & Building Technology; Engineering, Environmental;
Engineering, Civil
SC Construction & Building Technology; Engineering
GA 222GN
UT WOS:000324719300027
ER
PT J
AU Hurrell, JW
Holland, MM
Gent, PR
Ghan, S
Kay, JE
Kushner, PJ
Lamarque, JF
Large, WG
Lawrence, D
Lindsay, K
Lipscomb, WH
Long, MC
Mahowald, N
Marsh, DR
Neale, RB
Rasch, P
Vavrus, S
Vertenstein, M
Bader, D
Collins, WD
Hack, JJ
Kiehl, J
Marshall, S
AF Hurrell, James W.
Holland, M. M.
Gent, P. R.
Ghan, S.
Kay, Jennifer E.
Kushner, P. J.
Lamarque, J. -F.
Large, W. G.
Lawrence, D.
Lindsay, K.
Lipscomb, W. H.
Long, M. C.
Mahowald, N.
Marsh, D. R.
Neale, R. B.
Rasch, P.
Vavrus, S.
Vertenstein, M.
Bader, D.
Collins, W. D.
Hack, J. J.
Kiehl, J.
Marshall, S.
TI The Community Earth System Model A Framework for Collaborative Research
SO BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
LA English
DT Article
ID GENERAL-CIRCULATION MODEL; CLOUD MICROPHYSICS SCHEME; ARCTIC SEA-ICE;
ATMOSPHERE MODEL; PART I; THICKNESS DISTRIBUTION; SATELLITE
MEASUREMENTS; CLIMATE SENSITIVITY; WOOD-HARVEST; VERSION 4
AB The Community Earth System Model (CESM) is a flexible and extensible community tool used to investigate a diverse set of Earth system interactions across multiple time and space scales. This global coupled model significantly extends its predecessor, the Community Climate System Model, by incorporating new Earth system simulation capabilities. These comprise the ability to simulate biogeochemical cycles, including those of carbon and nitrogen, a variety of atmospheric chemistry options, the Greenland Ice Sheet, and an atmosphere that extends to the lower thermosphere. These and other new model capabilities are enabling investigations into a wide range of pressing scientific questions, providing new foresight into possible future climates and increasing our collective knowledge about the behavior and interactions of the Earth system. Simulations with numerous configurations of the CESM have been provided to phase 5 of the Coupled Model Intercomparison Project (CMIP5) and are being analyzed by the broad community of scientists. Additionally, the model source code and associated documentation are freely available to the scientific community to use for Earth system studies, making it a true community tool. This article describes this Earth system model and its various possible configurations, and highlights a number of its scientific capabilities.
C1 [Hurrell, James W.; Holland, M. M.; Gent, P. R.; Kay, Jennifer E.; Lamarque, J. -F.; Large, W. G.; Lawrence, D.; Lindsay, K.; Long, M. C.; Marsh, D. R.; Neale, R. B.; Vertenstein, M.; Kiehl, J.] Natl Ctr Atmospher Res, Boulder, CO 80307 USA.
[Ghan, S.; Rasch, P.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Kushner, P. J.] Univ Toronto, Dept Phys, Toronto, ON, Canada.
[Lipscomb, W. H.] Los Alamos Natl Lab, Los Alamos, NM USA.
[Mahowald, N.] Cornell Univ, Ithaca, NY USA.
[Vavrus, S.] Univ Wisconsin, Madison, WI USA.
[Bader, D.] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Collins, W. D.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Hack, J. J.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Marshall, S.] Univ Calgary, Calgary, AB, Canada.
RP Hurrell, JW (reprint author), NCAR Earth Syst Lab, POB 3000, Boulder, CO 80307 USA.
EM jhurrell@ucar.edu
RI Lawrence, David/C-4026-2011; Collins, William/J-3147-2014; Marsh,
Daniel/A-8406-2008; Lamarque, Jean-Francois/L-2313-2014; Mahowald,
Natalie/D-8388-2013; Bader, David/H-6189-2011; Ghan, Steven/H-4301-2011;
Long, Matthew/H-4632-2016; Kushner, Paul/H-6716-2016; Kay,
Jennifer/C-6042-2012
OI Lawrence, David/0000-0002-2968-3023; Collins,
William/0000-0002-4463-9848; Marsh, Daniel/0000-0001-6699-494X;
Lamarque, Jean-Francois/0000-0002-4225-5074; Mahowald,
Natalie/0000-0002-2873-997X; Bader, David/0000-0003-3210-339X; Ghan,
Steven/0000-0001-8355-8699; Long, Matthew/0000-0003-1273-2957; Kushner,
Paul/0000-0002-6404-4518;
FU U.S. Department of Energy, Office of Science, Scientific Discovery
through Advanced Computing (SciDAC) Program; Office of Science Earth
System Modeling Program; Northwest National Laboratory is operated for
the DOE by Battelle Memorial Institute [DEAC06-76RLO 1830]; National
Science Foundation; Office of Science (BER) of the Department of Energy
[DE-AC05-00OR22725]; Office of Science (BER) of the U.S. Department of
Energy
FX We thank the three referees of the original submission. Their
constructive comments and suggestions improved the manuscript
considerably. We also thank Dr. Jin-ho Yoon and Adam Phillips for their
help in the preparation of several figures, Miren Vizcaino for providing
output from CESM1(CISM) simulations, and William Sacks for software
engineering support that made the CESM1(CISM) simulations possible. S.
Ghan and P. Rasch were funded by the U.S. Department of Energy, Office
of Science, Scientific Discovery through Advanced Computing (SciDAC)
Program, and by the Office of Science Earth System Modeling Program. The
Pacific Northwest National Laboratory is operated for the DOE by
Battelle Memorial Institute under Contract DEAC06-76RLO 1830.; Computing
resources were provided by the Climate Simulation Laboratory at NCAR's
Computational and Information Systems Laboratory (CISL), sponsored by
the National Science Foundation and other agencies, and the Oak Ridge
Leadership Computing Facility, located in the National Center for
Computational Sciences at Oak Ridge National Laboratory, which is
supported by the Office of Science (BER) of the Department of Energy
under Contract DE-AC05-00OR22725. The CESM project is supported by the
National Science Foundation and the Office of Science (BER) of the U.S.
Department of Energy.
NR 94
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U1 18
U2 145
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0003-0007
EI 1520-0477
J9 B AM METEOROL SOC
JI Bull. Amer. Meteorol. Soc.
PD SEP
PY 2013
VL 94
IS 9
BP 1339
EP 1360
DI 10.1175/BAMS-D-12-00121.1
PG 22
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 227SQ
UT WOS:000325135100007
ER
PT J
AU He, T
Habib, S
AF He, Temple
Habib, Salman
TI Chaos and noise
SO CHAOS
LA English
DT Article
ID KAC-ZWANZIG MODEL; HEAT BATH MODELS; DYNAMICAL-SYSTEMS; BROWNIAN-MOTION;
MULTIPLICATIVE NOISE; INDUCE CHAOS
AB Simple dynamical systems-with a small number of degrees of freedom-can behave in a complex manner due to the presence of chaos. Such systems are most often (idealized) limiting cases of more realistic situations. Isolating a small number of dynamical degrees of freedom in a realistically coupled system generically yields reduced equations with terms that can have a stochastic interpretation. In situations where both noise and chaos can potentially exist, it is not immediately obvious how Lyapunov exponents, key to characterizing chaos, should be properly defined. In this paper, we show how to do this in a class of well-defined noise-driven dynamical systems, derived from an underlying Hamiltonian model. (C) 2013 AIP Publishing LLC.
C1 [He, Temple] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[He, Temple] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
[Habib, Salman] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Habib, Salman] Argonne Natl Lab, Div High Energy Phys, Lemont, IL 60439 USA.
[Habib, Salman] Argonne Natl Lab, Math & Comp Sci Div, Lemont, IL 60439 USA.
RP He, T (reprint author), Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA.
FU SULI award at Los Alamos National Laboratory
FX The work of T.H. was supported in part by a SULI award at Los Alamos
National Laboratory, and he acknowledges the many discussions he had
with Hideo Mabuchi. S.H. acknowledges past discussions with Tanmoy
Bhattacharya, Kurt Jacobs, Henry Kandrup, Elaine Mahon, Govindan
Rangarajan, Robert Ryne, Kosuke Shizume, and Robert Zwanzig.
NR 38
TC 5
Z9 5
U1 0
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 1054-1500
J9 CHAOS
JI Chaos
PD SEP
PY 2013
VL 23
IS 3
AR 033123
DI 10.1063/1.4813864
PG 11
WC Mathematics, Applied; Physics, Mathematical
SC Mathematics; Physics
GA 228AW
UT WOS:000325158300023
PM 24089959
ER
PT J
AU Thunga, M
Larson, K
Lio, W
Weerasekera, T
Akinc, M
Kessler, MR
AF Thunga, Mahendra
Larson, Kelsey
Lio, Wilber
Weerasekera, Thilina
Akinc, Mufit
Kessler, Michael R.
TI Low viscosity cyanate ester resin for the injection repair of hole-edge
delaminations in bismaleimide/carbon fiber composites
SO COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
LA English
DT Article
DE Polymer-matrix composites; Thermoset resin; Mechanical properties;
Delamination; Composite repair
ID DAMAGE
AB The repair efficiency of bisphenol E cyanate ester (BECy) resin was investigated for the injection repair of high temperature polymer-matrix composites by ultrasonic C-scan mapping, fluorescent dye penetration, optical microscopy, hole plate shear (HPS), and post delamination compression tests. Bismaleimide/carbon fiber (BMI-cf) composites were chosen as a model substrate. A vacuum-based resin injection repair method was used for repairing the pre-damaged composite specimens. The effect of surface wettability on the repair efficiency of BECy on BMI-cf composite substrate was studied by temperature dependent contact angle measurements. C-scan, fluorescent dye penetration, and optical microscopy images of pristine, delaminated, and repaired specimens reveal efficient infiltration of resin in specimens repaired at elevated temperatures. The repair efficiency calculated from HPS and post delamination compression tests was observed to be 155% and 100%, respectively, illustrating the capability of BECy for repairing high temperature structural composites. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Kessler, Michael R.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
RP Kessler, MR (reprint author), Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
EM mkessler@iastate.edu
RI Kessler, Michael/C-3153-2008
OI Kessler, Michael/0000-0001-8436-3447
FU Strategic Environmental Research and Development Program (SERDP)
[WP-1580]
FX Authors gratefully acknowledge the financial support from "Strategic
Environmental Research and Development Program (SERDP)," (Project Number
WP-1580). Special thanks to Dr. Vinay Dayal (Department of Aerospace
Engineering, Iowa State University) for helping with CAI tests and Dan
Barnard (Center for Nondestructive Evaluation, Iowa State University)
for guidance in C-Scan imaging and providing access to their laboratory
facilities.
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U1 5
U2 43
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1359-835X
J9 COMPOS PART A-APPL S
JI Compos. Pt. A-Appl. Sci. Manuf.
PD SEP
PY 2013
VL 52
BP 31
EP 37
DI 10.1016/j.compositesa.2013.05.001
PG 7
WC Engineering, Manufacturing; Materials Science, Composites
SC Engineering; Materials Science
GA 225KP
UT WOS:000324962100004
ER
PT J
AU Carney, LT
Bohonak, AJ
Edwards, MS
Alberto, F
AF Carney, Laura T.
Bohonak, Andrew J.
Edwards, Matthew S.
Alberto, Filipe
TI Genetic and experimental evidence for a mixed-age, mixed-origin bank of
kelp microscopic stages in southern California
SO ECOLOGY
LA English
DT Article
DE kelp gametophyte bank; kelp genetic diversity; Macrocystis pyrifera;
population recovery
ID MACROCYSTIS-PYRIFERA PHAEOPHYCEAE; GIANT-KELP; COASTAL ENVIRONMENTS;
SPORE DISPERSAL; RECRUITMENT; POPULATION; REPRODUCTION; FOREST;
CONSEQUENCES; GAMETOPHYTES
AB Laboratory studies have demonstrated that the microscopic stages of kelps can rapidly resume development from a delayed state. Like terrestrial seeds or aquatic resting eggs, banks of delayed kelp stages may supplement population recovery after periods of stress, playing an important role for kelp populations that experience adult sporophyte absences due to seasonal or interannual disturbances. We found that removing the microscopic stages from natural rock substratum could prevent the appearance of juvenile kelp sporophytes for three months and the establishment of a diverse kelp assemblage for over four months within a southern California kelp forest. Juveniles were observed within one month in plots where microscopic stages were left intact, which may confer an advantage for the resulting sporophytes as they attain larger sizes before later recruiting neighbors. Microsatellite diversity was high (expected heterozygosity H-E approximate to 0.9) for juveniles and adults within our sites. Using a microsatellite-based parentage analysis for the dominant kelp, Macrocystis pyrifera, we estimated that a portion of the new M. pyrifera sporophyte recruits had originated from their parents at least seven months after their parents had disappeared. Similar delay durations have been demonstrated in recent laboratory studies. Additionally, our results suggest that zoospore dispersal distances >50 m may be supported by including additional microsatellite loci in the analysis. We propose a mixed-age and, potentially, a mixed-origin bank of M. pyrifera gametophytes promotes maximal genetic diversity in recovering populations and reduces population genetic subdivision and self-fertilization rates for intact populations by promoting the survival of zoospores dispersed >10 m and during inhospitable environmental conditions.
C1 [Carney, Laura T.; Bohonak, Andrew J.; Edwards, Matthew S.] San Diego State Univ, Dept Biol, San Diego, CA 92182 USA.
[Carney, Laura T.] Sandia Natl Labs, Livermore, CA 94551 USA.
[Alberto, Filipe] Univ Algarve, Ctr Marine Sci, P-8005139 Faro, Portugal.
[Alberto, Filipe] Univ Wisconsin, Dept Biol Sci, Milwaukee, WI 53201 USA.
RP Carney, LT (reprint author), San Diego State Univ, Dept Biol, 5500 Campanile Dr, San Diego, CA 92182 USA.
EM lauratcarney@gmail.com
OI Alberto, Filipe/0000-0003-0593-3240
FU Santa Barbara Coastal Long Term Ecological Research project; U.S.
National Science Foundation (OCE) [0620276]; Portuguese Science
Foundation FCT [MEGIKELP PTDC/MAR/65461/2006]
FX This work would not have been possible without the help of the divers
who assisted in the field, including S. Fejtek, L. Lewis, C. Dodge, R.
Mothokakobo, H. Carson, R. Jenkinson, R. Borras, R. Carlton, and J.
Coates. Invaluable guidance and assistance with genetic techniques was
provided by N. Coelho, L. Gouveia, G. Silva, A. Mittleberg, and A.
Steele. Guidance on parentage analyses was provided by M. Christie and
T. Marshall. Expertise on latitude/longitude conversion was provided by
B. Nosrat, and site maps were created by H. Johnson. We also thank T.
Lane for his support of kelp ecology. The manuscript was improved based
on comments by S. Williams, J. Stachowicz, and two anonymous reviewers.
This research was supported by the Santa Barbara Coastal Long Term
Ecological Research project funded by the U.S. National Science
Foundation (OCE #0620276) and the Portuguese Science Foundation FCT,
grant MEGIKELP PTDC/MAR/65461/2006. This is contribution No. 10 of the
Coastal and Marine Institute Laboratory, San Diego State University.
NR 51
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U1 4
U2 22
PU ECOLOGICAL SOC AMER
PI WASHINGTON
PA 1990 M STREET NW, STE 700, WASHINGTON, DC 20036 USA
SN 0012-9658
EI 1939-9170
J9 ECOLOGY
JI Ecology
PD SEP
PY 2013
VL 94
IS 9
BP 1955
EP 1965
DI 10.1890/13-0250.1
PG 11
WC Ecology
SC Environmental Sciences & Ecology
GA 219TL
UT WOS:000324532900009
PM 24279267
ER
PT J
AU Norberg, NS
Lux, SF
Kostecki, R
AF Norberg, Nick S.
Lux, Simon Franz
Kostecki, Robert
TI Interfacial side-reactions at a LiNi0.5Mn1.5O4 electrode in organic
carbonate-based electrolytes
SO ELECTROCHEMISTRY COMMUNICATIONS
LA English
DT Article
DE Li-ion positive electrode; LiNi0.5Mn1.5O4; Interfacial reactions;
Fluorescence
ID LITHIUM-ION BATTERIES; CATHODE MATERIALS; RAMAN-SPECTRUM; SURFACE;
SPINEL; BEHAVIOR; FILM; LINI1/2MN3/2O4; TEMPERATURE; PERFORMANCE
AB Interfacial side-reactions at a LiNiO0.5Mn1.5O4 spinel electrode in LiPF6/organic carbonate-based electrolyte were investigated using FTIR and fluorescence spectroscopy. In situ measurements at a carbon- and binder-free LiNiO0.5Mn1.5O4 electrode showed formation of fluorescent species that coincides with the oxidation of NiII+ in a LiNiO0.5Mn1.5O4. The majority of these electrolyte oxidation products diffuse away into the electrolyte but fluorescence images of cycled a LiNiO0.5Mn1.5O4 composite electrodes also show fluorescent residues at the surface of the electrode. FTIR and Raman spectra of the surface layer indicate formation of metal-ion doped organic and inorganic compounds upon electrolyte oxidation at potentials above 42 V. (C) 2013 Elsevier BM. All rights reserved.
C1 [Norberg, Nick S.; Lux, Simon Franz; Kostecki, Robert] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA.
RP Kostecki, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA.
EM r_kostecki@lbl.gov
FU Assistant Secretary for Energy Efficiency and Renewable Energy, Office
of Vehicle Technologies of the U.S. Department of Energy
[DE-AC02-05CH11231]
FX This work was supported by the Assistant Secretary for Energy Efficiency
and Renewable Energy, Office of Vehicle Technologies of the U.S.
Department of Energy, under contract no. DE-AC02-05CH11231. We thank Dr.
Chunjoong Kim and Dr. Jordi Cabana for providing samples of
LiNi0.5Mn1.5O4 powder and composite
electrodes and Dr. Jaroslaw Syzdek for his help obtaining SEM images.
NR 27
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U1 5
U2 131
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1388-2481
J9 ELECTROCHEM COMMUN
JI Electrochem. Commun.
PD SEP
PY 2013
VL 34
BP 29
EP 32
DI 10.1016/j.elecom.2013.04.007
PG 4
WC Electrochemistry
SC Electrochemistry
GA 225LH
UT WOS:000324963900008
ER
PT J
AU Baggetto, L
Keum, JK
Browning, JF
Veith, GM
AF Baggetto, Loic
Keum, Jong K.
Browning, James F.
Veith, Gabriel M.
TI Germanium as negative electrode material for sodium-ion batteries
SO ELECTROCHEMISTRY COMMUNICATIONS
LA English
DT Article
DE Germanium (Ge) sputtered thin films; Sodium-ion (Na-ion) anode; 350 mA h
g(-1) reversible storage capacity; Amorphous bulk structure (XRD); FEC
electrolyte additive improves cycle life; Very high rate performance
ID ANODES; STORAGE
AB Germanium thin film electrodes show a reversible Na-ion reaction at potentials around 0.15/0.6 V. The reaction is accompanied with a reversible capacity close to 350 mAh g(-1), which matches the value expected for the formation of NaGe. The electrode capacity retention is stable over 15 cycles but subsequently declines. However, using fluoroethylene carbonate (FEC) electrolyte additive positively improves capacity retention and promotes the formation of a thinner SEI. Mechanical degradation due to repeated expansion/shrinkage coupled with SEI formation are the main sources of capacity decline. Preliminary XRD results do not reveal the formation of crystalline phases at full (dis)charge. The excellent charge rate up to 340 C highlights the high potential of nanosized germanium as Na-ion anode. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Baggetto, Loic; Veith, Gabriel M.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Keum, Jong K.] Oak Ridge Natl Lab, Neutron Sci Directorate, Spallat Neutron Source, Oak Ridge, TN 37831 USA.
[Browning, James F.] Oak Ridge Natl Lab, Chem & Engn Mat Div, Oak Ridge, TN 37831 USA.
RP Baggetto, L (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
EM baggettol@ornl.gov; veithgm@ornl.gov
RI Keum, Jong/N-4412-2015; Baggetto, Loic/D-5542-2017;
OI Keum, Jong/0000-0002-5529-1373; Baggetto, Loic/0000-0002-9029-2363;
Browning, James/0000-0001-8379-259X
FU U.S. Department of Energy (DOE), Basic Energy Sciences (BES), Materials
Sciences and Engineering Division; ORNL's Shared Research Equipment
(ShaRE) User Program; ORNL by the Office of BES, U.S. DOE
FX This work was supported by the U.S. Department of Energy (DOE), Basic
Energy Sciences (BES), Materials Sciences and Engineering Division.
Microscopy supported by ORNL's Shared Research Equipment (ShaRE) User
Program and XRD conducted at SNS and the Center for Nanophase Materials
Sciences are both sponsored at ORNL by the Office of BES, U.S. DOE.
NR 13
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U1 22
U2 231
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1388-2481
J9 ELECTROCHEM COMMUN
JI Electrochem. Commun.
PD SEP
PY 2013
VL 34
BP 41
EP 44
DI 10.1016/j.elecom.2013.05.025
PG 4
WC Electrochemistry
SC Electrochemistry
GA 225LH
UT WOS:000324963900011
ER
PT J
AU Shui, JL
Wang, HH
Liu, DJ
AF Shui, Jiang-Lan
Wang, Hsien-Hau
Liu, Di-Jia
TI Degradation and revival of Li-O-2 battery cathode
SO ELECTROCHEMISTRY COMMUNICATIONS
LA English
DT Article
DE Li-air battery; Electrolyte; Cathode; Passivation; Durability; Battery
revival
ID LITHIUM-OXYGEN BATTERIES; ETHER-BASED ELECTROLYTES; LI-AIR BATTERIES;
PERFORMANCE; REDUCTION; GRAPHENE
AB Current non-aqueous Li-O-2 cells usually could only operate for tens cycles, and electrolyte decomposition was always observed. Here it is demonstrated that, among all the cell elements, cathode is the first component to fail in our experiment. The passivation effect on the cathode was proven to be the reason for the loss of capacity in the cathode. However, the cathode was not permanently damaged in the failed cell and the capacity could be regenerated after the removal of the insulating layer. Thus, the cell's cycling was revived. This study presented a possibility of significantly elongating the lifespan of Li-O-2 cells. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Shui, Jiang-Lan; Liu, Di-Jia] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
[Wang, Hsien-Hau] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Shui, JL (reprint author), Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM shui@anl.gov; djliu@anl.gov
FU Office of Science, U. S. Department of Energy [DE-AC02-06CH11357]; Grand
Challenge program of Argonne National Laboratory
FX This work is supported by Office of Science, U. S. Department of Energy
under Contract DE-AC02-06CH11357. The financial support from the Grand
Challenge program of Argonne National Laboratory is gratefully
acknowledged.
NR 27
TC 23
Z9 23
U1 3
U2 59
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1388-2481
J9 ELECTROCHEM COMMUN
JI Electrochem. Commun.
PD SEP
PY 2013
VL 34
BP 45
EP 47
DI 10.1016/j.elecom.2013.05.020
PG 3
WC Electrochemistry
SC Electrochemistry
GA 225LH
UT WOS:000324963900012
ER
PT J
AU Xue, Z
Zhang, ZC
Amine, K
AF Xue, Zheng
Zhang, Zhengcheng
Amine, Khalil
TI Cross-linkable urethane acrylate oligomers as binders for lithium-ion
battery
SO ELECTROCHEMISTRY COMMUNICATIONS
LA English
DT Article
DE Binder; Cross-linked polymer; Acrylate oligomers; Lithium-ion batteries
ID ELECTROCHEMICAL PROPERTIES; NEGATIVE ELECTRODES; CATHODE BINDER;
GRAPHITE ANODE; CYCLE LIFE; POLYMERS; PERFORMANCE
AB Cross-linked polymers generated from low molecular weight oligomers were investigated for the first time as electrode binders in lithium-ion batteries. With urethane acrylate-based binder precursors, electrode laminates of LiNi1/3Mn1/3Co1/3O2 (NMC) with good physical properties were prepared via a thermally initiated free-radical polymerization process. The cured NMC electrode was evaluated in both NMC/Li and NMC/MCMB cells and showed excellent cycling performance and C-rate capability. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Xue, Zheng; Zhang, Zhengcheng; Amine, Khalil] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Zhang, ZC (reprint author), Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM zzhang@anl.gov
FU U.S. Department of Energy, Vehicle Technologies Office; U.S. Department
of Energy by UChicago Argonne, LLC [DE-AC02-06CH11357]
FX This research is supported by U.S. Department of Energy, Vehicle
Technologies Office. Argonne National Laboratory is operated for the
U.S. Department of Energy by UChicago Argonne, LLC, under contract
DE-AC02-06CH11357.
NR 20
TC 5
Z9 5
U1 7
U2 62
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1388-2481
J9 ELECTROCHEM COMMUN
JI Electrochem. Commun.
PD SEP
PY 2013
VL 34
BP 86
EP 89
DI 10.1016/j.elecom.2013.05.027
PG 4
WC Electrochemistry
SC Electrochemistry
GA 225LH
UT WOS:000324963900022
ER
PT J
AU Xia, YK
Chen, MJ
Zhu, PF
Lu, CC
Fu, GB
Zhou, XJ
Chen, DZ
Wang, HH
Hang, B
Wang, SL
Zhou, ZM
Sha, JH
Wang, XR
AF Xia, Yankai
Chen, Minjian
Zhu, Pengfei
Lu, Chuncheng
Fu, Guangbo
Zhou, Xiaojin
Chen, Daozhen
Wang, Honghua
Hang, Bo
Wang, Shoulin
Zhou, Zuomin
Sha, Jiahao
Wang, Xinru
TI Urinary phytoestrogen levels related to idiopathic male infertility in
Chinese men
SO ENVIRONMENT INTERNATIONAL
LA English
DT Article
DE Phytoestrogens; Exposure; Human urine; Male infertility; Semen quality
ID HUMAN SEMEN QUALITY; POLYCYCLIC AROMATIC-HYDROCARBONS; DIETARY
PHYTOESTROGENS; PESTICIDE EXPOSURE; BREAST-CANCER; FERTILE MEN; MALE
RATS; METABOLITES; RISK; HEALTH
AB Phytoestrogens (PEs) are naturally occurring chemical constituents of certain plants. The internal PE exposures, mainly from diet, vary among different populations and in different regions due to various eating habits. To investigate the potential relationship between urinary PE levels and idiopathic male infertility and semen quality in Chinese adult males, 608 idiopathic infertile men and 469 fertile controls were recruited by eligibility screening procedures. Individual exposure to PEs was measured using UPLC-MS/MS as spot urinary concentrations of 6 PEs (daidzein, DAI; equol, EQU; genistein, GEN; naringenin, NAR; coumestrol, COU; and secoisolariciresinol, SEC), which were adjusted with urinary creatinine (CR). Semen quality was assessed by sperm concentration, number per ejaculum and motility. We found that exposures to DAI, GEN and SEC were significantly associated with idiopathic male infertility (P-value for trend = 0.036; 0.002; and 0.0001, respectively), while these exposures had stronger association with infertile subjects with at least one abnormal semen parameter than those with all normal semen parameters. Exposures to DAI, GEN and SEC were also related to idiopathic male infertility with abnormal sperm concentration, number per ejaculum and motility (P-value for trend < 0.05), while these exposures had stronger association with the infertile men with abnormal sperm number per ejaculum. These findings provide the evidence that PE exposures are related to male reproductive function and raise a public health concern because that exposure to PEs is ubiquitous in China. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Xia, Yankai; Chen, Minjian; Zhu, Pengfei; Lu, Chuncheng; Fu, Guangbo; Wang, Shoulin; Zhou, Zuomin; Sha, Jiahao; Wang, Xinru] Nanjing Med Univ, State Key Lab Reprod Med, Inst Toxicol, Sch Publ Hlth, Nanjing 211166, Jiangsu, Peoples R China.
[Xia, Yankai; Chen, Minjian; Zhu, Pengfei; Lu, Chuncheng; Fu, Guangbo; Wang, Shoulin; Wang, Xinru] Nanjing Med Univ, Sch Publ Hlth, Key Lab Modern Toxicol, Minist Educ, Nanjing 211166, Jiangsu, Peoples R China.
[Zhu, Pengfei] Wuxi Ctr Dis Control & Prevent, Wuxi 214023, Peoples R China.
[Fu, Guangbo] Nanjing Med Univ, Huaian Affiliated Hosp 1, Huaian 223300, Peoples R China.
[Zhou, Xiaojin; Chen, Daozhen; Wang, Honghua] Nanjing Med Univ, Wuxi Maternal & Child Hlth Hosp, Wuxi 214002, Peoples R China.
[Hang, Bo] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Xia, YK (reprint author), Nanjing Med Univ, State Key Lab Reprod Med, Inst Toxicol, 818 East Tianyuan Rd, Nanjing 211166, Jiangsu, Peoples R China.
EM yankaixia@njmu.edu.cn; xrwang@njmu.edu.cn
FU National Natural Science Foundation of China [81072328, 30930079];
National 973 Program [2009CB941703]; MOE [211063]; Priority Academic
Program Development of Jiangsu Higher Education Institutions (PAPD)
FX We thank Dr. Jianling Bai for statistical analysis, and Ms. Renzhen Zhao
for PEs exposure analysis. This study was supported by grants from the
National Natural Science Foundation of China, No. 81072328; National 973
Program, 2009CB941703; Key Project of National Natural Science
Foundation of China, No. 30930079; Key Project of MOE, No. 211063; and
Priority Academic Program Development of Jiangsu Higher Education
Institutions (PAPD).
NR 37
TC 16
Z9 16
U1 5
U2 29
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0160-4120
EI 1873-6750
J9 ENVIRON INT
JI Environ. Int.
PD SEP
PY 2013
VL 59
BP 161
EP 167
DI 10.1016/j.envint.2013.06.009
PG 7
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA 224PQ
UT WOS:000324901000019
PM 23820060
ER
PT J
AU Elso, C
Lu, XC
Weisner, PA
Thompson, HL
Skinner, A
Carver, E
Stubbs, L
AF Elso, Colleen
Lu, Xiaochen
Weisner, Patricia A.
Thompson, Heather L.
Skinner, Andrea
Carver, Ethan
Stubbs, Lisa
TI A Reciprocal Translocation Dissects Roles of Pax6 Alternative Promoters
and Upstream Regulatory Elements in the Development of Pancreas, Brain,
and Eye
SO GENESIS
LA English
DT Article
DE Pax6 gene regulation; chromosome rearrangement; alternative transcript
function; eye development; pancreas development
ID NASAL DEVELOPMENT; GENETIC-ANALYSIS; ALLELIC SERIES; NERVOUS-SYSTEM;
PAIRED DOMAIN; MOUSE MODEL; EXPRESSION; MICE; OVEREXPRESSION;
ABNORMALITIES
AB Pax6 encodes a transcription factor with key roles in the development of the pancreas, central nervous system, and eye. Gene expression is orchestrated by several alternative promoters and enhancer elements that are distributed over several hundred kilobases. Here, we describe a reciprocal translocation, called 1Gso, which disrupts the integrity of transcripts arising from the 5-most promoter, P0, and separates downstream promoters from enhancers active in pancreas and eye. Despite this fact, 1Gso animals exhibit none of the dominant Pax6 phenotypes, and the translocation complements recessive brain and craniofacial phenotypes. However, 1Gso fails to complement Pax6 recessive effects in lacrimal gland, conjunctiva, lens, and pancreas. The 1Gso animals also express a corneal phenotype that is related to but distinct from that expressed by Pax6 null mutants, and an abnormal density and organization of retinal ganglion cell axons; these phenotypes may be related to a modest upregulation of Pax6 expression from downstream promoters that we observed during development. Our investigation maps the activities of Pax6 alternative promoters including a novel one in developing tissues, confirms the phenotypic consequences of upstream enhancer disruption, and limits the likely effects of the P0 transcript null mutation to recessive abnormalities in the pancreas and specific structures of the eye. genesis 51:630-646. (c) 2013 Wiley Periodicals, Inc.
C1 [Elso, Colleen; Thompson, Heather L.; Stubbs, Lisa] Lawrence Livermore Natl Lab, Genome Biol Div, Livermore, CA USA.
[Lu, Xiaochen; Skinner, Andrea; Stubbs, Lisa] Univ Illinois, Dept Cell & Dev Biol, Urbana, IL 61801 USA.
[Lu, Xiaochen; Weisner, Patricia A.; Stubbs, Lisa] Univ Illinois, Inst Genom Biol, Urbana, IL 61801 USA.
[Weisner, Patricia A.; Stubbs, Lisa] Univ Illinois, Neurosci Program, Urbana, IL 61801 USA.
[Carver, Ethan] Univ Tennessee, Dept Biol & Eenvironmental Sci, Chattanooga, TN USA.
RP Stubbs, L (reprint author), Univ Illinois, Dept Cell & Dev Biol, Urbana, IL 61801 USA.
EM ljstubbs@illinois.edu
OI Stubbs, Lisa/0000-0002-9556-1972
NR 45
TC 7
Z9 7
U1 0
U2 7
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1526-968X
J9 GENESIS
JI Genesis
PD SEP
PY 2013
VL 51
IS 9
BP 630
EP 646
DI 10.1002/dvg.22409
PG 17
WC Developmental Biology; Genetics & Heredity
SC Developmental Biology; Genetics & Heredity
GA 226DQ
UT WOS:000325015100003
PM 23798316
ER
PT J
AU Korneev, V
Glubokovskikh, S
AF Korneev, Valeri
Glubokovskikh, Stanislav
TI Seismic velocity changes caused by an overburden stress
SO GEOPHYSICS
LA English
DT Article
ID ELASTIC-WAVES; NONLINEAR ELASTICITY; INDUCED ANISOTROPY; ROCKS;
COEFFICIENTS; PROPAGATION; EXPLOSIONS; SCATTERING; SANDSTONE; PRESSURE
AB An increase in seismic velocity with depth is a common rock property, one that can be encountered practically everywhere. Overburden pressure increases vertical stress, producing a nonlinear elastic response. Application of a conventional nonlinear theory to this problem leads to transverse isotropy, with explicit relationships between nonlinear constants and elastic anisotropy parameters. These relationships can be used in velocity "depth trend" removal and in computing offset-dependent corrections for stacking and migration. Assumptions about small static stress and the use of linearized solutions for its evaluation are invalid for overburden problems - more accurate approximations are required. Realistic tomography models should account for elastic anisotropy as a basic feature. Our theory gives an accurate fit to well and stacking velocity data for the Los Angeles Basin. Overburden stress is a likely cause of shear-wave generation by underground explosions.
C1 [Korneev, Valeri] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
[Glubokovskikh, Stanislav] All Russian Res Inst Geosyst, Moscow, Russia.
RP Korneev, V (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
EM vakorneev@lbl.gov; stas.glubokovskikh@gmail.com
OI Glubokovskikh, Stanislav/0000-0001-8815-8918
FU BES office of the U.S. Department of Energy [DE-AC02-05CH11231];
ConocoPhillips
FX This work was supported by the BES office of the U.S. Department of
Energy, under contract No. DE-AC02-05CH11231, and partially supported by
ConocoPhillips. Borehole data were kindly provided by John Shaw.
Communication with Dave Aldridge was very stimulating. Authors also
thank Ilia Tsvankin for helpful discussions. Comments of Ian Jones and
an anonymous reviewer helped to improve the manuscript.
NR 47
TC 4
Z9 4
U1 0
U2 8
PU SOC EXPLORATION GEOPHYSICISTS
PI TULSA
PA 8801 S YALE ST, TULSA, OK 74137 USA
SN 0016-8033
J9 GEOPHYSICS
JI Geophysics
PD SEP-OCT
PY 2013
VL 78
IS 5
BP WC25
EP WC31
DI 10.1190/GEO2012-0380.1
PG 7
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 231EA
UT WOS:000325395200059
ER
PT J
AU Wang, ZX
Zhang, RF
Chao, YJ
Lam, PS
AF Wang, Zhong-Xian
Zhang, Ruei-Feng
Chao, Yuh J.
Lam, Poh-Sang
TI EFFECT OF MECHANICAL PROPERTY MISMATCH ON FAILURE ASSESSMENT CURVE FOR
WELDED JOINT WITH A SEMI-ELLIPTICAL CRACK
SO INTERNATIONAL JOURNAL OF APPLIED MECHANICS
LA English
DT Article
DE Semi-elliptical crack; mechanical property mismatch; elastic-plastic
fracture; constraint effect; J-A(2) two-parameter fracture theory;
failure assessment diagram (FAD); welded joint; FEA
ID 3-POINT BEND SPECIMENS; TIP FIELDS; TRIAXIALITY PARAMETER; TRANSITION
CURVE; LIMIT LOAD; FRACTURE; STRESS; CONSTRAINT; GROWTH; FAMILY
AB Elastic-plastic finite element analysis was performed to study the welded joints with a semi-elliptical crack. This research includes the effects of crack depth, strength mismatch ratio, and weld width on the crack driving force J-integral and the constraint parameter A(2) at the crack tip. A two-parameter J-A(2) fracture criterion based on the present results of crack tip stress field in the welded joints was established. The corresponding failure assessment diagrams were investigated in detail, from which the reliability and safety margin of the welded structures were discussed.
C1 [Wang, Zhong-Xian; Zhang, Ruei-Feng] Jiangsu Univ Zhenjiang, Fac Civil Engn & Mech, Zhenjiang 212013, Jiangsu, Peoples R China.
[Chao, Yuh J.] Tianjin Univ, Coll Mat Sci & Engn, Tianjin 300072, Peoples R China.
[Chao, Yuh J.] Univ S Carolina, Dept Mech Engn, Columbia, SC 29208 USA.
[Lam, Poh-Sang] Savannah River Natl Lab, Aiken, SC 29808 USA.
RP Wang, ZX (reprint author), Jiangsu Univ Zhenjiang, Fac Civil Engn & Mech, Zhenjiang 212013, Jiangsu, Peoples R China.
EM wzx-5566@163.com; zrf_0353@163.com; chao@cec.sc.edu; ps.lam@srnl.doe.gov
FU National Natural Science Foundation of China [51275338]
FX The author (Y. J. Chao) would like to thank the National Natural Science
Foundation of China for their financial support (51275338).
NR 30
TC 2
Z9 2
U1 0
U2 6
PU IMPERIAL COLLEGE PRESS
PI LONDON
PA 57 SHELTON ST, COVENT GARDEN, LONDON WC2H 9HE, ENGLAND
SN 1758-8251
J9 INT J APPL MECH
JI Int. J. Appl. Mech.
PD SEP
PY 2013
VL 5
IS 3
AR UNSP 1350029
DI 10.1142/S1758825113500294
PG 18
WC Mechanics
SC Mechanics
GA 230LA
UT WOS:000325339600006
ER
PT J
AU Moller, P
Sierk, AJ
AF Moeller, P.
Sierk, A. J.
TI 80 Years of the liquid drop-50 years of the macroscopic-microscopic
model
SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
LA English
DT Article
DE Nuclear mass; Fission barrier
ID GROUND-STATE PROPERTIES; NUCLEAR-MASSES; FISSION-BARRIERS; HEAVIEST
NUCLEI; DROPLET-MODEL; DEFORMATION ENERGIES; SUPERHEAVY NUCLEI;
SURFACE-TENSION; HEAVY; FORMULA
AB The liquid-drop model has its origins in the first mainstream model of the binding energy of nuclei, sometimes referred to as the semiempirical mass formula, which emerged in the mid 1930s. It is a beautiful example of a model that fulfills the criteria of what a theoretical model is and what an arbitrary parameterization of some data set is not: (1) it has a simple intuitive interpretation, (2) it was of enormous and immediate practical utility in interpreting nuclear experimental data such as radioactive decay and nuclear reactions, (3) it could predict binding energies of nuclei to which its parameters had not been adjusted, (4) it could be generalized to describe new, unanticipated phenomena such as fission, and (5) deviations of its predictions from experimental data yielded insight into nuclear structure and guided the development of more sophisticated models. Generalized liquid-drop models remain important because of the development of macroscopic-microscopic models which give important quantitative insight into ground-state structure and binding energies (nuclear masses) and many details of nuclear fission. We review these points and some associated historical milestones. (c) 2013 Elsevier B.V. All rights reserved.
C1 [Moeller, P.; Sierk, A. J.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Sierk, AJ (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM t2ajs@lanl.gov
OI Moller, Peter/0000-0002-5848-3565
FU National Nuclear Security Administration of the U.S. Department of
Energy at Los Alamos National Laboratory [DE-AC52-06NA25396]
FX The authors wish to thank Denise Neudecker for a careful reading of the
manuscript and for insightful comments. This work was carried out under
the auspices of the National Nuclear Security Administration of the U.S.
Department of Energy at Los Alamos National Laboratory under Contract
No. DE-AC52-06NA25396.
NR 77
TC 3
Z9 3
U1 1
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1387-3806
J9 INT J MASS SPECTROM
JI Int. J. Mass Spectrom.
PD SEP 1
PY 2013
VL 349
SI SI
BP 19
EP 25
DI 10.1016/j.ijms.2013.04.008
PG 7
WC Physics, Atomic, Molecular & Chemical; Spectroscopy
SC Physics; Spectroscopy
GA 226NL
UT WOS:000325043000004
ER
PT J
AU Clark, J
Savard, G
AF Clark, Jason
Savard, Guy
TI Precision masses for studies of the astrophysical r process
SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
LA English
DT Article
DE Ion trap; Penning trap; Exotic isotope; Radioactive isotope; Nuclear
masses; r-Process
ID PENNING TRAP; HEAVY-IONS; ONLINE; NUCLEAR; FACILITY; SPECTROMETER;
REFERENCES; NUCLIDES; ISOTOPES; JYFLTRAP
AB Half of the elements heavier than iron (Z > 26) are thought to be created through the astrophysical r process, whereby nuclides are produced via a rapid series of nuclear reactions that are postulated to occur in high temperature and neutron density environments such as supernovae or merging neutron stars. The nucleosynthetic path that describes the sequence of reactions through the chart of nuclides strongly depends on the neutron-separation energies of the nuclei. Until recently, however, almost all of these neutron-rich nuclei were not within reach of accelerator facilities, and therefore simulations of the r process had to rely on mass models for input into the calculations. Now, with the advent of facilities such as CARIBU at Argonne National Laboratory, the masses of many nuclides along the r-process path can be determined precisely with Penning trap mass spectrometers coupled to these facilities. More than 70 nuclides have been measured with the Canadian Penning Trap mass spectrometer alone in the past year, which overlap and complement results from other Penning trap mass spectrometers, and first calculations with these new masses suggest the timescale of the r process through the tin isotopes is delayed much more strongly than mass models would suggest. (C) 2013 Published by Elsevier B.V.
C1 [Clark, Jason; Savard, Guy] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
[Savard, Guy] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
RP Clark, J (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
EM jclark@phy.anl.gov
FU United States Department of Energy, Office of Nuclear Physics
[DE-AC02-06CH11357]
FX This work was supported by the United States Department of Energy,
Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357.
NR 39
TC 3
Z9 3
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1387-3806
J9 INT J MASS SPECTROM
JI Int. J. Mass Spectrom.
PD SEP 1
PY 2013
VL 349
SI SI
BP 81
EP 86
DI 10.1016/j.ijms.2013.05.021
PG 6
WC Physics, Atomic, Molecular & Chemical; Spectroscopy
SC Physics; Spectroscopy
GA 226NL
UT WOS:000325043000012
ER
PT J
AU Sinnis, G
AF Sinnis, Gus
CA Milagro Collaboration
HAWC Collaboration
TI TeV ASTROPHYSICS WITH THE MILAGRO AND HAWC OBSERVATORIES
SO INTERNATIONAL JOURNAL OF MODERN PHYSICS D
LA English
DT Article; Proceedings Paper
CT 3rd Galileo-Xuguangqi Meeting
CY OCT 11-15, 2011
CL Beijing, PEOPLES R CHINA
DE Gamma ray; cosmic ray; telescopes
ID GAMMA-RAYS; SOURCE LIST; EMISSION; GALAXY; FERMI
AB Ground-based gamma-ray astronomy has historically implemented two dramatically different techniques. One method employs Imaging Atmospheric Cherenkov Telescope(s) (IACT) that detect the Cherenkov light generated in the atmosphere by extensive air showers. The other method employs particle detectors that directly detect the particles that reach ground level - known as Extensive Air Shower (EAS) arrays. Until recently, the IACT method had been the only technique to yield solid detections of TeV gamma-ray sources. Utilizing water Chernkov technology, Milagro, was the first EAS array to discover new gamma-ray sources and demonstrated the power of and need for an all-sky high duty cycle instrument in the TeV energy regime. The transient nature of many TeV sources, the enormous number of potential sources, and the existence of TeV sources that encompass large angular areas all point to the need for an all-sky, high duty-factor instrument with even greater sensitivity than Milagro. The High Altitude Water Cherenkov (HAWC) Observatory will be over an order of magnitude more sensitive than Milagro. In this paper we will discuss the results from Milagro and the design of the HAWC instrument and its experimental sensitivity.
C1 [Sinnis, Gus; Milagro Collaboration; HAWC Collaboration] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
RP Sinnis, G (reprint author), Los Alamos Natl Lab, Div Phys, P-23 MS H803, Los Alamos, NM 87545 USA.
EM gus@lanl.gov
NR 11
TC 0
Z9 0
U1 0
U2 4
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0218-2718
J9 INT J MOD PHYS D
JI Int. J. Mod. Phys. D
PD SEP
PY 2013
VL 22
IS 11
SI SI
AR 1360010
DI 10.1142/S0218271813600109
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 225HH
UT WOS:000324952600010
ER
PT J
AU Karagiannis, G
Andrieu, C
AF Karagiannis, Georgios
Andrieu, Christophe
TI Annealed Importance Sampling Reversible Jump MCMC Algorithms
SO JOURNAL OF COMPUTATIONAL AND GRAPHICAL STATISTICS
LA English
DT Article
DE Bayesian model selection/determination; Gaussian mixture models; Poisson
change point problem; Pseudo-marginal MCMC
ID FREE-ENERGY DIFFERENCES; DISTRIBUTIONS
AB We develop a methodology to efficiently implement the reversible jump Markov chain Monte Carlo (RJ-MCMC) algorithms of Green, applicable for example to model selection inference in a Bayesian framework, which builds on the "dragging fast variables" ideas of Neal. We call such algorithms annealed importance sampling reversible jump (aisRJ). The proposed procedures can be thought of as being exact approximations of idealized RJ algorithms which in a model selection problem would sample the model labels only, but cannot be implemented. Central to the methodology is the idea of bridging different models with fictitious intermediate models, whose role is to introduce smooth intermodel transitions and, as we shall see, improve performance. Efficiency of the resulting algorithms is demonstrated on two standard model selection problems and we show that despite the additional computational effort incurred, the approach can be highly competitive computationally. Supplementary materials for the article are available online.
C1 [Karagiannis, Georgios] Pacific NW Natl Lab, Computat Sci & Math Div, Richland, WA 99352 USA.
[Andrieu, Christophe] Univ Bristol, Dept Math, Univ Walk, Bristol BS8 1TW, Avon, England.
RP Karagiannis, G (reprint author), Pacific NW Natl Lab, Computat Sci & Math Div, 902 Battelle Blvd,POB 999,MSIN K7-90, Richland, WA 99352 USA.
EM Georgios.Karagiannis@pnnl.gov; C.Andrieu@bristol.ac.uk
NR 17
TC 8
Z9 8
U1 0
U2 1
PU AMER STATISTICAL ASSOC
PI ALEXANDRIA
PA 732 N WASHINGTON ST, ALEXANDRIA, VA 22314-1943 USA
SN 1061-8600
J9 J COMPUT GRAPH STAT
JI J. Comput. Graph. Stat.
PD SEP
PY 2013
VL 22
IS 3
SI SI
BP 623
EP 648
DI 10.1080/10618600.2013.805651
PG 26
WC Statistics & Probability
SC Mathematics
GA 231BK
UT WOS:000325387800007
ER
PT J
AU Liu, D
Khaykovich, B
Gubarev, MV
Robertson, JL
Crow, L
Ramsey, BD
Moncton, DE
AF Liu, Dazhi
Khaykovich, Boris
Gubarev, Mikhail V.
Robertson, J. Lee
Crow, Lowell
Ramsey, Brian D.
Moncton, David E.
TI Demonstration of a novel focusing small-angle neutron scattering
instrument equipped with axisymmetric mirrors
SO NATURE COMMUNICATIONS
LA English
DT Article
ID REFRACTIVE OPTICS; RESOLUTION; DIFFRACTOMETER; CALIBRATION; FLUX
AB Small-angle neutron scattering (SANS) is the most significant neutron technique in terms of impact on science and engineering. However, the basic design of SANS facilities has not changed since the technique's inception about 40 years ago, as all SANS instruments, save a few, are still designed as pinhole cameras. Here we demonstrate a novel concept for a SANS instrument based on axisymmetric focusing mirrors. We build and test a small prototype, which shows a performance comparable to that of conventional large SANS facilities. By using a detector with 48-mu m pixels, we build the most compact SANS instrument in the world. This work, together with the recent demonstration that such mirrors could increase the signal rate at least 50-fold, for large samples, while improving resolution, paves the way to novel SANS instruments, thus affecting a broad community of scientists and engineers.
C1 [Liu, Dazhi; Khaykovich, Boris; Moncton, David E.] MIT, Nucl Reactor Lab, Cambridge, MA 02139 USA.
[Gubarev, Mikhail V.; Ramsey, Brian D.] NASA, Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
[Robertson, J. Lee; Crow, Lowell] Oak Ridge Natl Lab, Instrument & Source Design Div, Oak Ridge, TN 37831 USA.
[Moncton, David E.] MIT, Dept Phys, Cambridge, MA 02139 USA.
RP Khaykovich, B (reprint author), MIT, Nucl Reactor Lab, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
EM bkh@mit.edu
RI Liu, Dazhi/G-2675-2013; Khaykovich, Boris/A-7376-2012
OI Liu, Dazhi/0000-0002-7604-6940; Khaykovich, Boris/0000-0002-9490-2771
FU US Department of Energy, Office of Basic Energy Sciences, Division of
Materials Sciences and Engineering [DE-FG02-09ER46556,
DE-FG02-09ER46557]; Basic Energy Science (BES) Program, Office of
Science, US Department of Energy [DE-AC05-00OR22725]; UT-Battelle, LLC
FX We acknowledge useful discussions with Dr. D.F.R. Mildner (NIST).
Research has been supported by the US Department of Energy, Office of
Basic Energy Sciences, Division of Materials Sciences and Engineering
under Awards no. DE-FG02-09ER46556 and no. DE-FG02-09ER46557. The work
at ORNL has been sponsored by the Basic Energy Science (BES) Program,
Office of Science, US Department of Energy under contract number
DE-AC05-00OR22725 with UT-Battelle, LLC.
NR 24
TC 9
Z9 9
U1 0
U2 25
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 2041-1723
J9 NAT COMMUN
JI Nat. Commun.
PD SEP
PY 2013
VL 4
AR 2556
DI 10.1038/ncomms3556
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 233BD
UT WOS:000325538300001
PM 24077533
ER
PT J
AU Dawson, AL
Cassell, CH
Riehle-Colarusso, T
Grosse, SD
Tanner, JP
Kirby, RS
Watkins, SM
Correia, JA
Olney, RS
AF Dawson, April L.
Cassell, Cynthia H.
Riehle-Colarusso, Tiffany
Grosse, Scott D.
Tanner, Jean Paul
Kirby, Russell S.
Watkins, Sharon M.
Correia, Jane A.
Olney, Richard S.
TI Factors Associated With Late Detection of Critical Congenital Heart
Disease in Newborns
SO PEDIATRICS
LA English
DT Article
DE congenital heart disease; neonatal screening
ID PULSE OXIMETRY; BIRTH-DEFECTS; UNITED-STATES; FEASIBILITY; STRATEGIES;
MORTALITY; PROGRAMS; GEORGIA
AB OBJECTIVES: Critical congenital heart disease (CCHD) was recently added to the US Recommended Uniform Screening Panel for newborns. This study assessed whether maternal/household and infant characteristics were associated with late CCHD detection.
METHODS: This was a statewide, population-based, retrospective, observational study of infants with CCHD born between 1998 and 2007 identified by using the Florida Birth Defects Registry. We examined 12 CCHD conditions that are primary and secondary targets of newborn CCHD screening using pulse oximetry. We used Poisson regression models to analyze associations between selected characteristics (eg, CCHD type, birth hospital nursery level [highest level available in the hospital]) and late CCHD detection (defined as diagnosis after the birth hospitalization).
RESULTS: Of 3603 infants with CCHD and linked hospitalizations, CCHD was not detected during the birth hospitalization for 22.9% (n = 825) of infants. The likelihood of late detection varied by CCHD condition. Infants born in a birth hospital with a level I nursery only (adjusted prevalence ratio: 1.9 [95% confidence interval: 1.6-2.2]) or level II nursery (adjusted prevalence ratio: 1.5 [95% confidence interval: 1.3-1.7]) were significantly more likely to have late-detected CCHD compared with infants born in a birth hospital with a level III (highest) nursery.
CONCLUSIONS: After controlling for the selected characteristics, hospital nursery level seems to have an independent association with late CCHD detection. Thus, perhaps universal newborn screening for CCHD could be particularly beneficial in level I and II nurseries and may reduce differences in the frequency of late diagnosis between birth hospital facilities.
C1 [Dawson, April L.; Cassell, Cynthia H.; Riehle-Colarusso, Tiffany; Grosse, Scott D.; Olney, Richard S.] Ctr Dis Control & Prevent, Natl Ctr Birth Defects & Dev Disabil, Atlanta, GA USA.
[Dawson, April L.] Oak Ridge Inst Sci & Educ, Oak Ridge, TN USA.
[Tanner, Jean Paul; Kirby, Russell S.] Univ S Florida, Coll Publ Hlth, Dept Community & Family Hlth, Birth Defects Surveillance Program, Tampa, FL USA.
[Watkins, Sharon M.; Correia, Jane A.] Florida Birth Defects Registry Bur Epidemiol, Dept Hlth, Div Dis Control & Hlth Protect, Tallahassee, FL USA.
RP Dawson, AL (reprint author), CDC, NCBDDD, 1600 Clifton Rd,MS-E86, Atlanta, GA 30333 USA.
EM isp3@cdc.gov
FU March of Dimes Foundation [5-FY09-533]
FX A research grant (5-FY09-533) from the March of Dimes Foundation
supported various aspects of this project, including database
development. This study was also supported by appointments to the
Research Participation Program at the Centers for Disease Control and
Prevention administered by the Oak Ridge Institute for Science and
Education through an interagency agreement between the US Department of
Energy and the Centers for Disease Control and Prevention. Neither
funder was involved in decisions regarding design, analysis, or
interpretation of study results.
NR 30
TC 16
Z9 16
U1 0
U2 5
PU AMER ACAD PEDIATRICS
PI ELK GROVE VILLAGE
PA 141 NORTH-WEST POINT BLVD,, ELK GROVE VILLAGE, IL 60007-1098 USA
SN 0031-4005
J9 PEDIATRICS
JI Pediatrics
PD SEP
PY 2013
VL 132
IS 3
BP E604
EP E611
DI 10.1542/peds.2013-1002
PG 8
WC Pediatrics
SC Pediatrics
GA 226ZX
UT WOS:000325077800005
PM 23940249
ER
PT J
AU Barua, D
Hlavacek, WS
AF Barua, Dipak
Hlavacek, William S.
TI Modeling the Effect of APC Truncation on Destruction Complex Function in
Colorectal Cancer Cells
SO PLOS COMPUTATIONAL BIOLOGY
LA English
DT Article
ID ADENOMATOUS POLYPOSIS-COLI; BETA-CATENIN DEGRADATION; SYNTHASE KINASE
3-BETA; WNT SIGNALING PATHWAY; CRYSTAL-STRUCTURE; TUMOR-SUPPRESSOR;
GSK-3-BETA-DEPENDENT PHOSPHORYLATION; NEGATIVE REGULATOR; STRUCTURAL
BASIS; PLASMA-MEMBRANE
AB In colorectal cancer cells, APC, a tumor suppressor protein, is commonly expressed in truncated form. Truncation of APC is believed to disrupt degradation of beta-catenin, which is regulated by a multiprotein complex called the destruction complex. The destruction complex comprises APC, Axin, beta-catenin, serine/ threonine kinases, and other proteins. The kinases CK1 alpha and GSK-3 beta, which are recruited by Axin, mediate phosphorylation of b-catenin, which initiates its ubiquitination and proteosomal degradation. The mechanism of regulation of beta-catenin degradation by the destruction complex and the role of truncation of APC in colorectal cancer are not entirely understood. Through formulation and analysis of a rule-based computational model, we investigated the regulation of beta-catenin phosphorylation and degradation by APC and the effect of APC truncation on function of the destruction complex. The model integrates available mechanistic knowledge about site-specific interactions and phosphorylation of destruction complex components and is consistent with an array of published data. We find that the phosphorylated truncated form of APC can outcompete Axin for binding to beta-catenin, provided that Axin is limiting, and thereby sequester beta-catenin away from Axin and the Axin-recruited kinases CK1 alpha and GSK-3 beta. Full-length APC also competes with Axin for binding to beta-catenin; however, full-length APC is able, through its SAMP repeats, which bind Axin and which are missing in truncated oncogenic forms of APC, to bring beta-catenin into indirect association with Axin and Axin-recruited kinases. Because our model indicates that the positive effects of truncated APC on beta-catenin levels depend on phosphorylation of APC, at the first 20-amino acid repeat, and because phosphorylation of this site is mediated by CK1E, we suggest that CK1E is a potential target for therapeutic intervention in colorectal cancer. Specific inhibition of CK1E is predicted to limit binding of beta-catenin to truncated APC and thereby to reverse the effect of APC truncation.
C1 [Barua, Dipak; Hlavacek, William S.] Los Alamos Natl Lab, Div Theoret, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA.
[Barua, Dipak; Hlavacek, William S.] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
[Hlavacek, William S.] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA.
[Hlavacek, William S.] Translat Genom Res Inst, Clin Translat Res Div, Phoenix, AZ USA.
RP Barua, D (reprint author), Los Alamos Natl Lab, Div Theoret, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA.
EM wish@lanl.gov
OI Hlavacek, William/0000-0003-4383-8711
FU NIH [R01GM076570, P50GM085273]; Center for Nonlinear Studies at Los
Alamos National Laboratory; US Department of Energy [DE-AC52-06NA25396]
FX This work was supported in part by NIH grants R01GM076570 and
P50GM085273. DB acknowledges support from the Center for Nonlinear
Studies at Los Alamos National Laboratory, which is operated for the US
Department of Energy under contract DE-AC52-06NA25396. WSH acknowledges
support from the Randy Pausch Scholars Program, which is sponsored by
the TGen Foundation, Howard Young, and the Global Cure National Advisory
Council. The funders had no role in study design, data collection and
analysis, decision to publish, or preparation of the manuscript.
NR 77
TC 5
Z9 5
U1 2
U2 9
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1553-7358
J9 PLOS COMPUT BIOL
JI PLoS Comput. Biol.
PD SEP
PY 2013
VL 9
IS 9
AR e1003217
DI 10.1371/journal.pcbi.1003217
PG 18
WC Biochemical Research Methods; Mathematical & Computational Biology
SC Biochemistry & Molecular Biology; Mathematical & Computational Biology
GA 227AZ
UT WOS:000325080900018
PM 24086117
ER
PT J
AU Weck, PF
AF Weck, Philippe F.
TI WORKER EXPOSURE FOR AT-REACTOR MANAGEMENT OF SPENT NUCLEAR FUEL
SO RADIATION PROTECTION DOSIMETRY
LA English
DT Article
AB The radiological impact on workers associated with spent nuclear fuel dry storage operations at reactor sites is discussed. The resulting doses to workers exposed to external radiation include the dose during dry storage system loading, unloading and handling activities, the dose associated with independent spent fuel storage installation (ISFSI) operations, maintenance and surveillance activities, and the dose associated with additional ISFSI construction. Comprehensive dose estimates are reported based on previous radiation surveys.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Weck, PF (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM pfweck@sandia.gov
OI , Philippe/0000-0002-7610-2893
FU US Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]
FX This research was funded by the US Department of Energy's National
Nuclear Security Administration under contract DE-AC04-94AL85000.
NR 22
TC 0
Z9 0
U1 0
U2 9
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0144-8420
J9 RADIAT PROT DOSIM
JI Radiat. Prot. Dosim.
PD SEP
PY 2013
VL 156
IS 3
BP 386
EP 393
DI 10.1093/rpd/nct083
PG 8
WC Environmental Sciences; Public, Environmental & Occupational Health;
Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical
Imaging
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
GA 228KJ
UT WOS:000325184600020
PM 23564883
ER
PT J
AU Atamturktur, S
Williams, B
Egeberg, M
Unal, C
AF Atamturktur, Sez
Williams, Brian
Egeberg, Matthew
Unal, Cetin
TI Batch sequential design of optimal experiments for improved predictive
maturity in physics-based modeling
SO STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
LA English
DT Article
DE Modeling & simulation; Model calibration; Bayesian inference;
Visco-plastic self consistent; Polycrystal plasticity; Uncertainty
quantification; Optimal design of experiments
ID COMPUTER-MODELS; METHODOLOGY; UNCERTAINTY; CALIBRATION; VALIDATION
AB The focus of nuclear fuel design and maintenance has been shifting from a primarily empirical endeavor to that of highly advanced simulations characterized by experiment-based calibration, validation and uncertainty quantification. The experimental data available for calibration and validation, however, is limited by the availability of resources. This limitation poses difficulties especially if the model is to be executed to predict at different settings and/or regimes within a domain. To assure that the model exhibits predictive maturity throughout the domain of applicability, a sufficient number of experiments must be conducted to explore this domain. Given the limited resources, it is therefore crucial to design validation experiments to maximize the improvement in the predictive capability of the physics-based numerical models. This article contributes to the recent developments in the optimal design of validation experiments by evaluating the performance of several experiment selection criteria that specify the specific benefits desired from future experiments. Our focus is on the Batch Sequential Design methods, which for a given set of initial experiments and a selection criteria, iteratively select a batch of future experiments. The performance of various selection criteria in improving model predictiveness are compared considering not only the empirically identified model discrepancy, but also the coverage of the domain of applicability. The manuscript provides an extensive simulation-based study on a polycrystal plasticity material model, utilizing an established index that quantifies predictive maturity of numerical models.
C1 [Atamturktur, Sez; Egeberg, Matthew] Clemson Univ, Glenn Dept Civil Engn, Clemson, SC 29634 USA.
[Williams, Brian; Unal, Cetin] Los Alamos Natl Lab, Los Alamos, NM USA.
RP Atamturktur, S (reprint author), Clemson Univ, Glenn Dept Civil Engn, Clemson, SC 29634 USA.
EM sez@clemson.edu
OI Williams, Brian/0000-0002-3465-4972
FU Verification and Uncertainty Quantification (VU) program element of the
Nuclear Energy Advanced Modeling and Simulation (NEAMS) program at Los
Alamos National Laboratory (LANL) [84093-RFP-10]; Department of Energy
Office of Nuclear Energy's Nuclear Energy University Programs [00101999]
FX This work is funded in part by the Verification and Uncertainty
Quantification (VU) program element of the Nuclear Energy Advanced
Modeling and Simulation (NEAMS) program at Los Alamos National
Laboratory (LANL): subcontract Number 84093-RFP-10. This research is
being performed in part using funding received from the Department of
Energy Office of Nuclear Energy's Nuclear Energy University Programs
(Contract Number: 00101999). The authors would like to thank Ricardo
Lebensohn and Carlos Tome of Los Alamos National Laboratory for sharing
the VPSC code. The technical support of Eddie Duffy of Clemson
University in the use of the Palmetto Cluster is appreciated. Also,
thanks to Murat Hamutcuoglu, a former post-doctoral fellow and RJ
Cadotte, an undergraduate student of Clemson University for their
assistance in the preparation of the manuscript.
NR 47
TC 4
Z9 4
U1 0
U2 11
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1615-147X
EI 1615-1488
J9 STRUCT MULTIDISCIP O
JI Struct. Multidiscip. Optim.
PD SEP
PY 2013
VL 48
IS 3
BP 549
EP 569
DI 10.1007/s00158-013-0915-8
PG 21
WC Computer Science, Interdisciplinary Applications; Engineering,
Multidisciplinary; Mechanics
SC Computer Science; Engineering; Mechanics
GA 227AL
UT WOS:000325079300007
ER
PT J
AU Aute, V
Saleh, K
Abdelaziz, O
Azarm, S
Radermacher, R
AF Aute, V.
Saleh, K.
Abdelaziz, O.
Azarm, S.
Radermacher, R.
TI Cross-validation based single response adaptive design of experiments
for Kriging metamodeling of deterministic computer simulations
SO STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
LA English
DT Article
DE Design optimization; Design of experiments; Kriging metamodeling; Heat
exchanger design
ID GLOBAL OPTIMIZATION; HEAT-EXCHANGERS; APPROXIMATION; CRITERIA
AB A new approach for single response adaptive design of deterministic computer experiments is presented. The approach is called SFCVT, for Space-Filling Cross-Validation Tradeoff. SFCVT uses metamodeling to obtain an estimate of cross-validation errors, which are maximized subject to a constraint on space filling to determine sample points in the design space. The proposed method is compared, using a test suite of forty four numerical examples, with three DOE methods from the literature. The numerical test examples can be classified into symmetric and asymmetric functions. Symmetric examples refer to functions for which the extreme points are located symmetrically in the design space and asymmetric examples are those for which the extreme regions are not located in a symmetric fashion in the design space. Based upon the comparison results for the numerical examples, it is shown that SFCVT performs better than an existing adaptive and a non-adaptive DOE method for asymmetric multimodal functions with high nonlinearity near the boundary, and is comparable for symmetric multimodal functions and other test problems. The proposed approach is integrated with a multi-scale heat exchanger optimization tool to reduce the computational effort involved in the design of novel air-to-water heat exchangers. The resulting designs are shown to be significantly more compact than mainstream heat exchanger designs.
C1 [Aute, V.; Saleh, K.; Azarm, S.; Radermacher, R.] Univ Maryland, Dept Mech Engn, College Pk, MD 20742 USA.
[Abdelaziz, O.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Aute, V (reprint author), Univ Maryland, Dept Mech Engn, College Pk, MD 20742 USA.
EM vikrant@umd.edu; ksaleh@umd.edu; abdelazizoa@ornl.gov; azarm@umd.edu;
raderm@umd.edu
RI Abdelaziz, Omar/O-9542-2015;
OI Abdelaziz, Omar/0000-0002-4418-0125; Radermacher,
Reinhard/0000-0002-9406-1466
FU Office of Naval Research [N000140710468]
FX The work presented in this paper was supported in part through a
contract from the Office of Naval Research, contract number
N000140710468. Such support does not constitute an endorsement by the
funding agency of the opinions expressed in the paper.
NR 48
TC 9
Z9 10
U1 1
U2 18
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1615-147X
J9 STRUCT MULTIDISCIP O
JI Struct. Multidiscip. Optim.
PD SEP
PY 2013
VL 48
IS 3
BP 581
EP 605
DI 10.1007/s00158-013-0918-5
PG 25
WC Computer Science, Interdisciplinary Applications; Engineering,
Multidisciplinary; Mechanics
SC Computer Science; Engineering; Mechanics
GA 227AL
UT WOS:000325079300009
ER
PT J
AU Karig, DK
Jung, SY
Srijanto, B
Collier, CP
Simpson, ML
AF Karig, David K.
Jung, Seung-Yong
Srijanto, Bernadeta
Collier, C. Patrick
Simpson, Michael L.
TI Probing Cell-Free Gene Expression Noise in Femtoliter Volumes
SO ACS SYNTHETIC BIOLOGY
LA English
DT Article
DE cell-free expression; confinement; noise; stochastic
ID FREE PROTEIN-SYNTHESIS; ESCHERICHIA-COLI; MESSENGER-RNA; SINGLE-CELL;
CIRCUITS; TRANSLATION; INITIATION; FREQUENCY; NETWORKS; CONSEQUENCES
AB Cell-free systems offer a simplified and flexible context that enables important biological reactions while removing complicating factors such as fitness, division, and mutation that are associated with living cells, powever, cell-free expression in unconfined spaces is missing important elements of expression in living cells. In particular, t the small volume of living cells can give rise to significant stochastic effects, which are negligible in bulk cell-free reactions. Here, we confine cell-free gene expression reactions to cell-relevant 20 IL volumes (between the volumes of Escherichia coli and Saccharomyces cerevisiae), in polydimethylsiloxane (PDMS) containers. We demonstrate that expression efficiency varies Widely among different containers, likely due to non-Poisson distribution of expression machinery at the observed scale. Previously, this phenomenon has been observed only in liposomes. In addition, we analyze gene expression noise. This analysis is facilitated by our use of cell-free systems, which allow the mapping of the measured noise properties to intrinsic noise models. In contrast, previous live cell noise analysis efforts have been complicated by multiple noise sources. Noise analysis reveals signatures of translational bursting, while noise dynamics suggest that overall cell-free expression is limited by a diminishing translation rate. In addition to offering a unique approach to understanding noise in gene circuits, our work contributes to a deeper understanding of the biophysical properties of cell-free expression systems, thus aiding efforts to harness cell-free systems for synthetic biology applications.
C1 [Karig, David K.; Srijanto, Bernadeta; Collier, C. Patrick; Simpson, Michael L.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
[Jung, Seung-Yong] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN 37831 USA.
[Simpson, Michael L.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Simpson, Michael L.] Univ Tennessee, Ctr Environm Biotechnol, Knoxville, TN 37996 USA.
RP Simpson, ML (reprint author), Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Bethel Valley Rd, Oak Ridge, TN 37831 USA.
EM simpsonml1@ornl.gov
RI Simpson, Michael/A-8410-2011; Srijanto, Bernadeta/D-4213-2016; Collier,
Charles/C-9206-2016; Karig, David/G-5703-2011
OI Simpson, Michael/0000-0002-3933-3457; Srijanto,
Bernadeta/0000-0002-1188-1267; Collier, Charles/0000-0002-8198-793X;
Karig, David/0000-0002-9508-6411
FU Center for Nanophase Materials Sciences; Scientific User Facilities
Division, Office of Science, U.S. Department of Energy; U.S. Department
of Energy [DE-AC05-00OR22725]
FX We thank Dr. Roy Dar, Dr. Scott Retterer, Dr. Jennifer Morrell-Falvey,
and Dr. Mitch Doktycz for helpful advice and conversations. We
acknowledge support from the Center for Nanophase Materials Sciences
that is sponsored by the Scientific User Facilities Division, Office of
Science, U.S. Department of Energy. This research was performed at Oak
Ridge National Laboratory (ORNL). ORNL is managed by UT-Battelle, LLC,
for the U.S. Department of Energy under contract DE-AC05-00OR22725.
NR 61
TC 10
Z9 10
U1 0
U2 20
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 2161-5063
J9 ACS SYNTH BIOL
JI ACS Synth. Biol.
PD SEP
PY 2013
VL 2
IS 9
BP 497
EP 505
DI 10.1021/sb400028c
PG 9
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 223WB
UT WOS:000324842100003
PM 23688072
ER
PT J
AU Jiao, ZB
Luan, JH
Zhang, ZW
Miller, MK
Ma, WB
Liu, CT
AF Jiao, Z. B.
Luan, J. H.
Zhang, Z. W.
Miller, M. K.
Ma, W. B.
Liu, C. T.
TI Synergistic effects of Cu and Ni on nanoscale precipitation and
mechanical properties of high-strength steels
SO ACTA MATERIALIA
LA English
DT Article
DE Cu-rich nanoprecipitate; Nanoscale precipitation; Grain-size refinement;
Ultrahigh-strength steel; Alloy development
ID HIGH-TEMPERATURE OXIDATION; FIM-ATOM PROBE; FE-CU; PHASE-TRANSFORMATION;
SOLUTE COPPER; PCT COPPER; ALLOY; NUCLEATION; HEAT; IRON
AB There is an increasing demand for ultrahigh-strength terrific steels strengthened by nanoprecipitates. Improvement of the precipitation strengthening response requires an understanding of the nanoscale precipitation mechanisms. In this study, the synergistic effects of Cu and Ni on nanoscale precipitation and mechanical properties of ferritic steels were thoroughly investigated, and new steels with ultra-high strength and high ductility have been developed. Our results indicate that Ni effectively increases the number density of Cu-rich nanoprecipitates by more than an order of magnitude, leading to a substantial increase in yield strength. It appears that Ni decreases both the strain energy for nucleation and the interfacial energy between the nucleus and the matrix, thereby decreasing the critical energy for nucleation of Cu-rich nanoprecipitates. Cu and Ni are also found to be beneficial to grain-size refinement, resulting from lowering the austenite-to-ferrite transformation temperature, as determined from thermodynamic calculations. In addition, the strengthening mechanisms of Cu and Ni were quantitatively evaluated in terms of precipitation strengthening, grain refinement strengthening and solid-solution strengthening. The current findings shed light on the composition-microstructure-property relationships in nanoprecipitate-strengthened ferritic steels. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Jiao, Z. B.; Luan, J. H.; Liu, C. T.] City Univ Hong Kong, Ctr Adv Struct Mat, Dept Mech & Biomed Engn, Kowloon, Hong Kong, Peoples R China.
[Zhang, Z. W.; Miller, M. K.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Ma, W. B.] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China.
RP Liu, CT (reprint author), City Univ Hong Kong, Ctr Adv Struct Mat, Dept Mech & Biomed Engn, Kowloon, Hong Kong, Peoples R China.
EM chainliu@cityu.edu.hk
RI zhang, zhongwu/G-1875-2012
OI zhang, zhongwu/0000-0002-2874-2976
FU City University of Hong Kong [9380060]; Office of Basic Energy Sciences,
US Department of Energy
FX This research was supported by the internal funding from City University
of Hong Kong (account CityU No. 9380060). Atom probe tomography research
was performed under the Oak Ridge National Laboratory's Shared Research
Equipment (ShaRE) User Program, which is sponsored by the Office of
Basic Energy Sciences, US Department of Energy. The authors would like
to thank Prof. G.Q. Liu from the University of Science and Technology
Beijing for helpful assistance on the thermodynamic calculations.
NR 51
TC 22
Z9 24
U1 15
U2 60
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
EI 1873-2453
J9 ACTA MATER
JI Acta Mater.
PD SEP
PY 2013
VL 61
IS 16
BP 5996
EP 6005
DI 10.1016/j.actamat.2013.06.040
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 218RI
UT WOS:000324449700008
ER
PT J
AU Shen, YF
Wang, YD
Liu, XP
Sun, X
Peng, RL
Zhang, SY
Zuo, L
Liaw, PK
AF Shen, Y. F.
Wang, Y. D.
Liu, X. P.
Sun, X.
Peng, R. Lin
Zhang, S. Y.
Zuo, L.
Liaw, P. K.
TI Deformation mechanisms of a 20Mn TWIP steel investigated by in situ
neutron diffraction and TEM
SO ACTA MATERIALIA
LA English
DT Article
DE Twinning-induced plasticity steel; In situ neutron diffraction;
Twinning; Martensite
ID AUSTENITIC STAINLESS-STEELS; STACKING-FAULT ENERGY; X-RAY-DIFFRACTION;
MN-C STEEL; TRIP/TWIP STEELS; MARTENSITIC NUCLEATION;
PLASTIC-DEFORMATION; EPSILON-MARTENSITE; TRIP STEELS; BEHAVIOR
AB The deformation mechanisms and associated microstructure changes during tensile loading of an annealed twinning-induced plasticity steel with chemical composition Fe-20Mn-3Si-3Al-0.045C (wt.%) were systematically investigated using in situ time-of-flight neutron diffraction in combination with post mortem transmission electron microscopy (TEM). The initial microstructure of the investigated alloy consists of equiaxed gamma grains with the initial alpha'-phase of similar to 7% in volume. In addition to dislocation slip, twinning and two types of martensitic transformations from the austenite to alpha'- and epsilon-martensites were observed as the main deformation modes during the tensile deformation. In situ neutron diffraction provides a powerful tool for establishing the deformation mode map for elucidating the role of different deformation modes in different strain regions. The critical stress is 520 MPa for the martensitic transformation from austenite to alpha'-martensite, whereas a higher stress (>600 MPa) is required for actuating the deformation twin and/or the martensitic transformation from austenite to epsilon-martensite. Both epsilon- and alpha'-martensites act as hard phases, whereas mechanical twinning contributes to both the strength and the ductility of the studied steel. TEM observations confirmed that the twinning process was facilitated by the parent grains oriented with < 1 1 1 > or < 1 1 0 > parallel to the loading direction. The nucleation and growth of twins are attributed to the pole and self-generation formation mechanisms, as well as the stair-rod cross-slip mechanism. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Shen, Y. F.; Wang, Y. D.; Liu, X. P.; Zuo, L.] Northeastern Univ, Key Lab Anisotropy & Texture Mat, Shenyang 110004, Peoples R China.
[Liu, X. P.; Sun, X.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Peng, R. Lin] Linkoping Univ, Dept Management & Engn, S-58183 Linkoping, Sweden.
[Zhang, S. Y.] CCLRC Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
[Liaw, P. K.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
RP Shen, YF (reprint author), Northeastern Univ, Key Lab Anisotropy & Texture Mat, Shenyang 110004, Peoples R China.
EM Shenyf@smm.neu.edu.cn
RI wang, yandong/G-9404-2013
FU National Natural Science Foundation of China [51231002, 51001024,
50725102]; Fundamental Research Funds for the Central Universities
[N100702001, N100302003]; National Science and Technology Support
Project [2011BAE13B03]; Specialized Research Fund for the Doctoral
Program of Higher Education (SRFDP) [20110042120003]; US National
Science Foundation [CMMI-1100080, CMMI-0900271, DMR-0909037]; US
Department of Energy (DOE); Office of Nuclear Energy's Nuclear Energy
University Program [NEUP-00119262]; DOE's Office of Fossil Energy,
National Energy Technology Laboratory [DE-FE-0008855]; DOE
[DE-AC05-76RL01830]; DOE's Office of FreedomCAR and Vehicle Technologies
under the Automotive Lightweighting Materials Program
FX The present research is supported by the National Natural Science
Foundation of China (Grant Nos. 51231002, 51001024 and 50725102), the
Fundamental Research Funds for the Central Universities (Grant Nos.
N100702001 and N100302003) and the National Science and Technology
Support Project (2011BAE13B03). X.P. Liu would like to acknowledge the
support from the Specialized Research Fund for the Doctoral Program of
Higher Education (SRFDP) (No. 20110042120003). P.K. Liaw very much
appreciates the financial support of the US National Science Foundation
(CMMI-1100080, CMMI-0900271 and DMR-0909037), the US Department of
Energy (DOE), Office of Nuclear Energy's Nuclear Energy University
Program (NEUP-00119262) and the DOE's Office of Fossil Energy, National
Energy Technology Laboratory (DE-FE-0008855). Pacific Northwest National
Laboratory is operated by the Battelle for the DOE under Contract No.
DE-AC05-76RL01830. This work was partially funded by the DOE's Office of
FreedomCAR and Vehicle Technologies under the Automotive Lightweighting
Materials Program managed by Mr. William Joost.
NR 54
TC 15
Z9 15
U1 4
U2 63
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD SEP
PY 2013
VL 61
IS 16
BP 6093
EP 6106
DI 10.1016/j.actamat.2013.06.051
PG 14
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 218RI
UT WOS:000324449700016
ER
PT J
AU Somerday, BP
Sofronis, P
Nibur, KA
San Marchi, C
Kirchheim, R
AF Somerday, B. P.
Sofronis, P.
Nibur, K. A.
San Marchi, C.
Kirchheim, R.
TI Elucidating the variables affecting accelerated fatigue crack growth of
steels in hydrogen gas with low oxygen concentrations
SO ACTA MATERIALIA
LA English
DT Article
DE Hydrogen embrittlement; Fatigue; Steel; Hydrogen gas impurities
ID STRAIN-RATE; PROPAGATION; FRACTURE; STRESS; MECHANISMS; THRESHOLD
AB The objective of this study was to quantify the effects of mechanical and environmental variables on oxygen-modified accelerated fatigue crack growth of steels in hydrogen gas. Experimental results show that in hydrogen gas containing up to 1000 v.p.p.m. oxygen fatigue crack growth rates for X52 line pipe steel are initially coincident with those measured in air or inert gas, but these rates abruptly accelerate above a critical Delta K level that depends on the oxygen concentration. In addition to the bulk gas oxygen concentration, the onset of hydrogen-accelerated crack growth is affected by the load cycle frequency and load ratio R. Hydrogen-accelerated fatigue crack growth is actuated when threshold levels of both the inert environment crack growth rate and K-max, are exceeded. The inert environment crack growth rate dictates the creation of new crack tip surface area, which in turn determines the extent of crack tip oxygen coverage and associated hydrogen uptake, while K-max governs the activation of hydrogen-assisted fracture modes through its relationship to the crack tip stress field. The relationship between the inert environment crack growth rate and crack tip hydrogen uptake is established through the development of an analytical model, which is formulated based on the assumption that oxygen coverage can be quantified from the balance between the rates of new crack tip surface creation and diffusion-limited oxygen transport through the crack channel to this surface. Provided K-max exceeds the threshold value for stress-driven hydrogen embrittlement activation, this model shows that stimulation of hydrogen-accelerated crack growth depends on the interplay between the inert environment crack growth increment per cycle, load cycle frequency, R ratio and bulk gas oxygen concentration. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Somerday, B. P.; San Marchi, C.] Sandia Natl Labs, Livermore, CA 94550 USA.
[Somerday, B. P.; Sofronis, P.; Kirchheim, R.] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, Fukuoka 8190395, Japan.
[Sofronis, P.] Univ Illinois, Urbana, IL 61801 USA.
[Nibur, K. A.] Hy Performance Mat Testing, Bend, OR 97701 USA.
[Kirchheim, R.] Univ Gottingen, Inst Mat Phys, D-37073 Gottingen, Germany.
[Kirchheim, R.] Max Planck Inst Iron Res GmbH, Dusseldorf, Germany.
RP Somerday, BP (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
EM bpsomer@sandia.gov
FU US Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]; US Department of Energy Fuel Cell Technologies
Office through the Hydrogen Delivery sub-program element; US Department
of Energy [GO15045]; International Institute for Carbon Neutral Energy
Research; World Premier International Research Center Initiative, MEXT,
Japan
FX The assistance of Ken Lee in conducting the fatigue crack growth tests
in hydrogen gas environments as well as Andy Gardea and Ryan Nishimoto
in performing metallography and microscopy is gratefully acknowledged.
Sandia National Laboratories is a multi-program laboratory managed and
operated by Sandia Corp., a wholly owned subsidiary of Lockheed Martin
Corp., for the US Department of Energy's National Nuclear Security
Administration under Contract DE-AC04-94AL85000. The experimental work
presented here was supported by the US Department of Energy Fuel Cell
Technologies Office through the Hydrogen Delivery sub-program element.
P.S. gratefully acknowledges support from the US Department of Energy
through Grant GO15045. In addition, B.P.S., P.S., and R.K. acknowledge
support from the International Institute for Carbon Neutral Energy
Research, sponsored by the World Premier International Research Center
Initiative, MEXT, Japan.
NR 38
TC 21
Z9 21
U1 3
U2 31
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD SEP
PY 2013
VL 61
IS 16
BP 6153
EP 6170
DI 10.1016/j.actamat.2013.07.001
PG 18
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 218RI
UT WOS:000324449700021
ER
PT J
AU Guo, HC
Shi, F
Ma, ZF
Zhou, ZW
Zhou, YR
AF Guo Hai-Chao
Shi Fan
Ma Zheng-Fei
Zhou Zhi-Wen
Zhou Yi-Ran
TI Molecular simulations of adsorption and separation of natural gas on
zeolitic imidazolate frameworks
SO ACTA PHYSICA SINICA
LA Chinese
DT Article
DE grand canonical Monte Carlo; natural gas separation; zeolitic
imidazolate framework
ID METAL-ORGANIC FRAMEWORKS; EFFECTIVE CORE POTENTIALS; CARBON-DIOXIDE
CAPTURE; CANONICAL MONTE-CARLO; DYNAMICS SIMULATIONS; ORBITAL METHODS;
METHANE; MIXTURE; ALKANES; HYDROCARBONS
AB Grand canonical Monte Carlo simulations were employed to investigate the adsorption and separation of C2H6, CO2 and CH4 on two zeolitic imidazolate frameworks (ZIF-2 and ZIF-71). The adsorption isotherm and isosteric heat of pure gas, the separation performance of C2H6-CH4, CO2-CH4 and C2H6-CO2 binary mixtures and C2H6-CO2-CH4 ternary mixtures on two ZIFs were simulated and discussed. For single component gas adsorption at a low pressure, the adsorption amount depended on isosteric heat; at a high pressure, due to the limited pore volume, ZIFs preferably adsorbed smaller size gas molecules. For gas mixture separation, energetic effect dominated at low pressure, therefore, ZIFs selectively adsorbed gas component with strong interactions; packing effect usually played an important role at high pressures, consequently, smaller size component would be more entropically favorable. Results demonstrated that both ZIF-2 and ZIF-71 were of good separation performance for these three binary mixtures. For the ternary mixture separation, it was found that ZIF-2 cowld effectively separate C2H6 and CO2 from CH4 at 3000-4000 kPa and room temperature.
C1 [Guo Hai-Chao; Ma Zheng-Fei] Nanjing Univ Technol, Coll Chem & Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China.
[Shi Fan] URS Corp, South Pk, PA USA.
[Shi Fan] US DOE, Natl Energy Technol Lab, Pittsburgh, PA USA.
[Zhou Zhi-Wen; Zhou Yi-Ran] Navi Hlth & Environm Technol, Pittsburgh, PA USA.
RP Ma, ZF (reprint author), Nanjing Univ Technol, Coll Chem & Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China.
EM mazf@njut.edu.cn
RI Guo, Haichao/A-5824-2013
NR 48
TC 1
Z9 1
U1 6
U2 39
PU CHINESE PHYSICAL SOC
PI BEIJING
PA P O BOX 603, BEIJING 100080, PEOPLES R CHINA
SN 1000-3290
J9 ACTA PHYS SIN-CH ED
JI Acta Phys. Sin.
PD SEP
PY 2013
VL 62
IS 17
AR 176802
DI 10.7498/aps.62.176802
PG 8
WC Physics, Multidisciplinary
SC Physics
GA 224HX
UT WOS:000324875300057
ER
PT J
AU Natalizio, E
Di Caro, G
Sekercioglu, A
Yanmaz, E
AF Natalizio, Enrico
Di Caro, Gianni
Sekercioglu, Ahmet
Yanmaz, Evsen
TI A special issue of Ad Hoc Networks on "Theory, algorithms and
applications of wireless networked robotics"
SO AD HOC NETWORKS
LA English
DT Editorial Material
C1 [Natalizio, Enrico] Univ Calabria, I-87030 Commenda Di Rende, Italy.
[Di Caro, Gianni] Dalle Molle Inst Artificial Intelligence IDSIA, Lugano, Switzerland.
[Yanmaz, Evsen] US DOE, CCS Div, Univ Calif Los Alamos Natl Lab, Washington, DC 20585 USA.
[Yanmaz, Evsen] Univ Klagenfurt, Networked & Embedded Syst Inst, Mobile Syst Grp, Klagenfurt, Austria.
RP Natalizio, E (reprint author), Georgia Tech, BWN Broadband Wireless Networking Lab, Atlanta, GA USA.
OI Sekercioglu, Ahmet/0000-0001-9119-8400
NR 0
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1570-8705
J9 AD HOC NETW
JI Ad Hoc Netw.
PD SEP
PY 2013
VL 11
IS 7
SI SI
BP 1891
EP 1892
DI 10.1016/j.adhoc.2013.08.002
PG 2
WC Computer Science, Information Systems; Telecommunications
SC Computer Science; Telecommunications
GA 223WK
UT WOS:000324843000001
ER
PT J
AU Bailey, DH
Borwein, JM
Crandall, RE
Rose, MG
AF Bailey, David H.
Borwein, Jonathan M.
Crandall, Richard E.
Rose, Michael G.
TI Expectations on fractal sets
SO APPLIED MATHEMATICS AND COMPUTATION
LA English
DT Article
DE Expectations; Fractals; Self-similarity; Numerical quadrature; Monte
Carlo methods
ID BOX INTEGRALS; MOMENTS; DISTRIBUTIONS
AB Using fractal self-similarity and functional-expectation relations, the classical theory of box integrals - being expectations on unit hypercubes - is extended to a class of fractal "string-generated Cantor sets" (SCSs) embedded in unit hypercubes of arbitrary dimension. Motivated by laboratory studies on the distribution of brain synapses, these SCSs were designed for dimensional freedom - a suitable choice of generating string allows for fine-tuning the fractal dimension of the corresponding set. We also establish closed forms for certain statistical moments on SCSs, develop a precision algorithm for high embedding dimensions, and report various numerical results. The underlying numerical quadrature issues are in themselves quite challenging. (C) 2013 Elsevier Inc. All rights reserved.
C1 [Bailey, David H.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Borwein, Jonathan M.; Rose, Michael G.] Univ Newcastle, Ctr Comp Assisted Res Math & Its Applicat CARMA, Callaghan, NSW 2308, Australia.
[Crandall, Richard E.] Reed Coll, Ctr Adv Computat, Portland, OR 97202 USA.
RP Rose, MG (reprint author), Univ Newcastle, Ctr Comp Assisted Res Math & Its Applicat CARMA, Callaghan, NSW 2308, Australia.
EM dhbailey@lbl.gov; jonathan.borwein@newcastle.edu.au;
michael.rose@newcastle.edu.au
FU Office of Computational and Technology Research, Division of
Mathematical, Information, and Computational Sciences of the U.S.
Department of Energy [DE-AC02-05CH11231]
FX Supported in part by the Director, Office of Computational and
Technology Research, Division of Mathematical, Information, and
Computational Sciences of the U.S. Department of Energy, under Contract
Number DE-AC02-05CH11231.
NR 21
TC 3
Z9 3
U1 0
U2 7
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0096-3003
EI 1873-5649
J9 APPL MATH COMPUT
JI Appl. Math. Comput.
PD SEP 1
PY 2013
VL 220
BP 695
EP 721
DI 10.1016/j.amc.2013.06.078
PG 27
WC Mathematics, Applied
SC Mathematics
GA 220CP
UT WOS:000324558600068
ER
PT J
AU Loots, GG
AF Loots, Gabriela G.
TI How genomics is changing our view of cancer
SO BRIEFINGS IN FUNCTIONAL GENOMICS
LA English
DT Editorial Material
C1 Lawrence Livermore Natl Lab, Biol & Biotechnol Div, Livermore, CA 94550 USA.
RP Loots, GG (reprint author), Lawrence Livermore Natl Lab, Biol & Biotechnol Div, 7000 East Ave,L-452, Livermore, CA 94550 USA.
NR 6
TC 0
Z9 0
U1 0
U2 1
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 2041-2649
J9 BRIEF FUNCT GENOMICS
JI Brief. Funct. Genomics
PD SEP
PY 2013
VL 12
IS 5
SI SI
BP 389
EP 390
DI 10.1093/bfgp/elt035
PG 2
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA 223BE
UT WOS:000324777500001
PM 24048221
ER
PT J
AU Hudson, BD
Kulp, KS
Loots, GG
AF Hudson, Bryan D.
Kulp, Kristen S.
Loots, Gabriela G.
TI Prostate cancer invasion and metastasis: insights from mining genomic
data
SO BRIEFINGS IN FUNCTIONAL GENOMICS
LA English
DT Article
DE Prostate cancer; metastasis; bone metastasis; biomarkers; microarrays;
RNA-seq
ID CIRCULATING TUMOR-CELLS; CDNA MICROARRAY ANALYSIS; GENE-EXPRESSION
ANALYSIS; LASER-CAPTURE MICRODISSECTION; BREAST-CANCER; BONE METASTASIS;
MESSENGER-RNA; DIFFERENTIAL EXPRESSION; PLASMINOGEN-ACTIVATOR;
BETA-CATENIN
AB Prostate cancer (PCa) is the second most commonly diagnosed malignancy in men in the Western world and the second leading cause of cancer-related deaths among men worldwide. Although most cancers have the potential to metastasize under appropriate conditions, PCa favors the skeleton as a primary site of metastasis, suggesting that the bone microenvironment is conducive to its growth. PCa metastasis proceeds through a complex series of molecular events that include angiogenesis at the site of the original tumor, local migration within the primary site, intravasation into the blood stream, survival within the circulation, extravasation of the tumor cells to the target organ and colonization of those cells within the new site. In turn, each one of these steps involves a complicated chain of events that utilize multiple protein-protein interactions, protein signaling cascades and transcriptional changes. Despite the urgent need to improve current biomarkers for diagnosis, prognosis and drug resistance, advances have been slow. Global gene expression methods such as gene microarrays and RNA sequencing enable the study of thousands of genes simultaneously and allow scientists to examine molecular pathways of cancer pathogenesis. In this review, we summarize the current literature that explored high-throughput transcriptome analysis toward the advancement of biomarker discovery for PCa. Novel biomarkers are strongly needed to enable more accurate detection of PCa, improve prediction of tumor aggressiveness and facilitate the discovery of new therapeutic targets for tailored medicine. Promising molecular markers identified from gene expression profiling studies include HPN, CLU1, WT1, WNT5A, AURKA and SPARC.
C1 [Hudson, Bryan D.] Lawrence Livermore Natl Lab, Biol & Biotechnol Div, Livermore, CA 94550 USA.
[Kulp, Kristen S.; Loots, Gabriela G.] Lawrence Livermore Natl Lab, Biol & Biotechnol Div, Pharmacol & Toxicol Grp, Livermore, CA 94550 USA.
RP Hudson, BD (reprint author), Lawrence Livermore Natl Lab, Biol & Biotechnol Div, 7000 East Ave,L-452, Livermore, CA 94550 USA.
EM hudson27@llnl.gov
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[De-AC52-07NA27344]; [LDRD13-ERD-042]
FX The authors would like to thank Nick R. Hum for designing Figure 1. This
work was done under the auspices of the U.S. Department of Energy by
Lawrence Livermore National Laboratory under contract De-AC52-07NA27344
and was supported by LDRD13-ERD-042.
NR 165
TC 11
Z9 11
U1 1
U2 18
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 2041-2649
J9 BRIEF FUNCT GENOMICS
JI Brief. Funct. Genomics
PD SEP
PY 2013
VL 12
IS 5
SI SI
BP 397
EP 410
DI 10.1093/bfgp/elt021
PG 14
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA 223BE
UT WOS:000324777500003
PM 23878130
ER
PT J
AU van de Walle, A
Tiwary, P
de Jong, M
Olmsted, DL
Asta, M
Dick, A
Shin, D
Wang, Y
Chen, LQ
Liu, ZK
AF van de Walle, A.
Tiwary, P.
de Jong, M.
Olmsted, D. L.
Asta, M.
Dick, A.
Shin, D.
Wang, Y.
Chen, L-Q
Liu, Z-K
TI Efficient stochastic generation of special quasirandom structures
SO CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
LA English
DT Article
DE Special quasirandom structures; Monte Carlo; Alloy theory; Ab initio
methods; Disordered state; Solid solution
ID ELECTRONIC-STRUCTURE; THERMODYNAMIC PROPERTIES; SOLID-SOLUTIONS;
SYSTEMS; PHASE; FCC
AB We present a new algorithm to generate Special Quasirandom Structures (SQS), i.e., best periodic supercell approximations to the true disordered state for a given number of atoms per supercell. The method is based on a Monte Carlo simulated annealing loop with an objective function that seeks to perfectly match the maximum number of correlation functions (as opposed to merely minimizing the distance between the SQS correlation and the disordered state correlations for a pre-specified set of correlations). The proposed method optimizes the shape of the supercell jointly with the occupation of the atomic sites, thus ensuring that the configurational space searched is exhaustive and not biased by a pre-specified supercell shape. The method has been implemented in the "mcsqs" code of the Alloy Theoretic Automated Toolkit (ATAT) in the most general framework of multicomponent multisublattice systems and in a way that minimizes the amount of input information the user needs to specify and that allows for efficient parallelization. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [van de Walle, A.; Tiwary, P.] Brown Univ, Providence, RI 02912 USA.
[de Jong, M.; Olmsted, D. L.; Asta, M.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Shin, D.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Wang, Y.; Chen, L-Q; Liu, Z-K] Penn State Univ, University Pk, PA 16802 USA.
RP van de Walle, A (reprint author), Brown Univ, Providence, RI 02912 USA.
EM avdw@alum.mit.edu
RI van de Walle, Axel/L-5676-2013; Wang, Yi/D-1032-2013; Tiwary,
Pratyush/G-6576-2011; Shin, Dongwon/C-6519-2008; Chen,
LongQing/I-7536-2012; Liu, Zi-Kui/A-8196-2009
OI van de Walle, Axel/0000-0002-3415-1494; Shin,
Dongwon/0000-0002-5797-3423; Chen, LongQing/0000-0003-3359-3781; Liu,
Zi-Kui/0000-0003-3346-3696
FU US Office of Naval Research (ONR) [N00014-11-1-0886, N00014-12-1-0557]
FX The authors acknowledge financial support from the US Office of Naval
Research (ONR) under Grant nos. N00014-11-1-0886 and N00014-12-1-0557.
This work made use of computational resources provided under the Extreme
Science and Engineering Discovery Environment (XSEDE).
NR 22
TC 81
Z9 81
U1 8
U2 94
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0364-5916
J9 CALPHAD
JI Calphad-Comput. Coupling Ph. Diagrams Thermochem.
PD SEP
PY 2013
VL 42
BP 13
EP 18
DI 10.1016/j.calphad.2013.06.006
PG 6
WC Thermodynamics; Chemistry, Physical; Materials Science,
Multidisciplinary; Metallurgy & Metallurgical Engineering
SC Thermodynamics; Chemistry; Materials Science; Metallurgy & Metallurgical
Engineering
GA 221OM
UT WOS:000324668200003
ER
PT J
AU Chen, XJ
Chen, MJ
Xu, B
Tang, R
Han, XM
Qin, YF
Xu, B
Hang, B
Mao, ZL
Huo, WW
Xia, YK
Xu, ZF
Wang, XR
AF Chen, Xiaojiao
Chen, Minjian
Xu, Bo
Tang, Rong
Han, Xiumei
Qin, Yufeng
Xu, Bin
Hang, Bo
Mao, Zhilei
Huo, Weiwei
Xia, Yankai
Xu, Zhengfeng
Wang, Xinru
TI Parental phenols exposure and spontaneous abortion in Chinese population
residing in the middle and lower reaches of the Yangtze River
SO CHEMOSPHERE
LA English
DT Article
DE Pentachlorophenol; 4-n-Octylphenol; Spontaneous abortion; Parental
urinary exposure
ID BISPHENOL-A BPA; PREGNANCY LOSS; RECURRENT MISCARRIAGE;
MASS-SPECTROMETRY; OXIDATIVE STRESS; IN-VITRO; RATS; RISK;
PENTACHLOROPHENOL; METAANALYSIS
AB Widespread use of phenols has led to ubiquitous exposure to phenols. In experimental animals, phenols increased resorptions, reduced live litter size and fetal body weights. However, there are limited epidemiological evidences of the relationships between exposure to phenols and pregnancy outcomes. We evaluated the associations between parental urinary levels of various phenols and spontaneous abortion in a Chinese population residing in the middle and lower reaches of the Yangtze River. A case-control study was conducted that included 70 case couples with medically unexplained spontaneous abortion and 180 control couples who did not have a history of spontaneous abortion and had at least one living child. Both parental urinary phenols were measured by ultra-high performance liquid chromatography-tandem mass spectrometry including bisphenol A (BPA), benzophenone-3 (BP-3), 2,3,4-trichlorophenol (2,3,4-TCP), pentachlorophenol (PCP), 4-n-octylphenol (4-n-OP) and 4-n-nonylphenol (4-n-NP). Compared with the low exposure group, there was an increased risk of spontaneous abortion with high paternal urinary PCP concentration [odds ratio (OR) = 2.09, 95% Confidence Interval (Cl), 1.05-4.14], and maternal exposure to 4-n-OP and alkylphenol(s) also significantly increased the risk of spontaneous abortion (OR = 2.21, 95% Cl, 1.02-4.80; OR = 2.81, 95% Cl, 1.39-5.65, respectively). Our study firstly provides the evidence that paternal PCP exposure, maternal 4-n-OP and alkylphenol(s) exposure are associated with spontaneous abortion in humans. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Chen, Xiaojiao; Chen, Minjian; Xu, Bo; Tang, Rong; Han, Xiumei; Qin, Yufeng; Xu, Bin; Mao, Zhilei; Huo, Weiwei; Xia, Yankai; Wang, Xinru] Nanjing Med Univ, State Key Lab Reprod Med, Inst Toxicol, Nanjing 210029, Jiangsu, Peoples R China.
[Chen, Xiaojiao; Chen, Minjian; Xu, Bo; Tang, Rong; Han, Xiumei; Qin, Yufeng; Xu, Bin; Mao, Zhilei; Huo, Weiwei; Xia, Yankai; Wang, Xinru] Nanjing Med Univ, Minist Educ, Key Lab Modern Toxicol, Sch Publ Hlth, Nanjing 210029, Jiangsu, Peoples R China.
[Hang, Bo] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Dept Canc & DNA Damage Responses, Berkeley, CA 94720 USA.
[Xu, Zhengfeng] Nanjing Med Univ, Ctr Prenatal Diag, Nanjing Matern & Child Hlth Hosp, Nanjing 210029, Jiangsu, Peoples R China.
RP Xia, YK (reprint author), Nanjing Med Univ, State Key Lab Reprod Med, Inst Toxicol, 818 East Tianyuan Rd, Nanjing 211166, Jiangsu, Peoples R China.
EM yankaixia@njmu.edu.cn
FU National 973 Program [2012CBA01306]; National Twelfth-Five Science and
Technology Support Program of China [2012BAI31B07]; National Natural
Science Foundation of China [81072328]; Key Project of MOE [211063];
Priority Academic Program Development of Jiangsu Higher Education
Institutions (PAPD)
FX We thank Ms. Rencheng Zhao for the chemical analysis. This study was
supported by National 973 Program (2012CBA01306); National Twelfth-Five
Science and Technology Support Program of China (No. 2012BAI31B07);
National Natural Science Foundation of China (No. 81072328); The Key
Project of MOE (No. 211063); Priority Academic Program Development of
Jiangsu Higher Education Institutions (PAPD).
NR 45
TC 10
Z9 12
U1 2
U2 32
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0045-6535
J9 CHEMOSPHERE
JI Chemosphere
PD SEP
PY 2013
VL 93
IS 2
BP 217
EP 222
DI 10.1016/j.chemosphere.2013.04.067
PG 6
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA 221OH
UT WOS:000324667700003
PM 23714150
ER
PT J
AU Williams, JT
Baccarelli, P
Paulotto, S
Jackson, DR
AF Williams, Jeffrey T.
Baccarelli, Paolo
Paulotto, Simone
Jackson, David R.
TI 1-D Combline Leaky-Wave Antenna With the Open-Stopband Suppressed:
Design Considerations and Comparisons With Measurements
SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
LA English
DT Article
DE Leaky-wave antennas; leaky waves; periodic structures
ID RADIATION
AB The design of a 1-D planar periodic combline leaky-wave antenna that avoids the open-stopband effects as the beam is scanned through broadside is discussed and verified experimentally. This antenna radiates from nearly resonant stubs, which ensures a small leakage constant and hence a high directivity, and shows a single beam scanning through its n = -1 space harmonic in the X-band frequency range. The open-stopband suppression is obtained by applying a recently proposed matching technique within the unit cell [1] that is experimentally validated here for the first time. Measurements are made of the phase and leakage constants, the S-parameters, and the realized gain patterns. Comparisons are made with numerical values obtained from specialized and commercial software and very good agreement is found in all cases.
C1 [Williams, Jeffrey T.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Baccarelli, Paolo] Univ Roma La Sapienza, Dept Informat Engn Elect & Telecommun, I-00184 Rome, Italy.
[Paulotto, Simone] Maxtena Inc, Bethesda, MD 20814 USA.
[Jackson, David R.] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA.
RP Williams, JT (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM jtwill@sandia.gov; baccarelli@diet.uniroma1.it; s.paulotto@gmail.com;
djackson@uh.edu
NR 21
TC 7
Z9 7
U1 0
U2 8
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-926X
J9 IEEE T ANTENN PROPAG
JI IEEE Trans. Antennas Propag.
PD SEP
PY 2013
VL 61
IS 9
BP 4484
EP 4492
DI 10.1109/TAP.2013.2271234
PG 9
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 217SI
UT WOS:000324380500009
ER
PT J
AU Anghel, M
Milano, F
Papachristodoulou, A
AF Anghel, Marian
Milano, Federico
Papachristodoulou, Antonis
TI Algorithmic Construction of Lyapunov Functions for Power System
Stability Analysis
SO IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
LA English
DT Article
DE Lyapunov methods; nonlinear systems; power system transient stability;
sum of squares; transient energy function
ID TRANSFER-CONDUCTANCES; BCU METHOD; ENERGY FUNCTIONS; DEPENDENT LOADS;
REGIONS; MODELS; DYNAMICS; SQUARES; FORM
AB We present a methodology for the algorithmic construction of Lyapunov functions for the transient stability analysis of classical power system models. The proposed methodology uses recent advances in the theory of positive polynomials, semidefinite programming, and sum of squares decomposition, which have been powerful tools for the analysis of systems with polynomial vector fields. In order to apply these techniques to power grid systems described by trigonometric nonlinearities we use an algebraic reformulation technique to recast the system's dynamics into a set of polynomial differential algebraic equations. We demonstrate the application of these techniques to the transient stability analysis of power systems by estimating the region of attraction of the stable operating point. An algorithm to compute the local stability Lyapunov function is described together with an optimization algorithm designed to improve this estimate.
C1 [Anghel, Marian] Los Alamos Natl Lab, CCS Div, Los Alamos, NM 87545 USA.
[Milano, Federico] Univ Castilla La Mancha, Dept Elect Engn, E-13071 Ciudad Real, Spain.
[Papachristodoulou, Antonis] Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England.
RP Anghel, M (reprint author), Los Alamos Natl Lab, CCS Div, POB 1663, Los Alamos, NM 87545 USA.
EM manghel@lanl.gov; Federico.Mi-lano@uclm.es; antonis@eng.ox.ac.uk
OI Milano, Federico/0000-0002-0049-9185
FU U.S. Department of Energy through the LANL/LDRD Program; Ministry of
Science and Innovation of Spain, MICINN [ENE2009-07685, ENE2012-31326];
Engineering and Physical Sciences Research Council [EP/J012041/1,
EP/I031944/1, EP/J010537/1, EP/H03062X/1]
FX The work of M. Anghel was supported in part by the U.S. Department of
Energy through the LANL/LDRD Program. The work of F. Milano was
supported in part by the Ministry of Science and Innovation of Spain,
MICINN Projects ENE2009-07685 and ENE2012-31326. The work of A.
Papachristodoulou was supported in part by the Engineering and Physical
Sciences Research Council projects EP/J012041/1, EP/I031944/1,
EP/J010537/1, and EP/H03062X/1. This paper was recommended by Associate
Editor X. Li.
NR 50
TC 20
Z9 21
U1 0
U2 12
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1549-8328
EI 1558-0806
J9 IEEE T CIRCUITS-I
JI IEEE Trans. Circuits Syst. I-Regul. Pap.
PD SEP
PY 2013
VL 60
IS 9
BP 2533
EP 2546
DI 10.1109/TCSI.2013.2246233
PG 14
WC Engineering, Electrical & Electronic
SC Engineering
GA 216AS
UT WOS:000324253800027
ER
PT J
AU Muljadi, E
Singh, M
Gevorgian, V
AF Muljadi, Eduard
Singh, Mohit
Gevorgian, Vahan
TI Doubly Fed Induction Generator in an Offshore Wind Power Plant Operated
at Rated V/Hz
SO IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
LA English
DT Article
DE Doubly fed asynchronous generator (DFAG); doubly fed induction generator
(DFIG); frequency modulation; high-voltage alternating current (HVAC);
high-voltage direct current (HVDC); induction generator; open-loop
systems; renewable energy; stability; torque control; V/f; variable
speed; volt per hertz; voltage control; wind turbine generator (WTG)
ID V/F CONTROL METHOD; HIGH-PERFORMANCE; FARM
AB This paper introduces the concept of constant volt/hertz operation of offshore wind power plants (WPPs). The deployment of offshore WPPs requires power transmission from the plant to the load center inland. Because this power transmission requires submarine cables, there is a need to use high-voltage direct current (HVDC) transmission, which is economical for distances greater than 50 km. In the concept presented here, the onshore substation was operated at 60 Hz synced with the grid, and the offshore substation was operated at variable frequency and voltage, allowing the WPP to be operated at constant volt/hertz. In this paper, a variable frequency at rated volt/hertz operation was applied to a Type 3 doubly fed induction generator (DFIG) wind turbine generator. The size of the power converter at the turbine can be significantly reduced from 30% of the rated power output in a conventional Type 3 turbine to 5% of the rated power. The DFIG allows each turbine to vary its operating speed with respect to the other turbines. Thus, small wind diversity within the WPP can be accommodated by the DFIG, and the collector system frequency can be controlled by HVDC to follow large variations in average wind speed.
C1 [Muljadi, Eduard; Singh, Mohit; Gevorgian, Vahan] Natl Renewable Energy Lab, Natl Wind Technol Ctr, Golden, CO 80401 USA.
RP Muljadi, E (reprint author), Natl Renewable Energy Lab, Natl Wind Technol Ctr, Golden, CO 80401 USA.
EM muljadi@nrel.gov; mohit.singh@nrel.gov; vahan.gevorgian@nrel.gov
FU U.S. Department of Energy [DE-AC36-08-GO28308]; National Renewable
Energy Laboratory
FX This work was supported by the U.S. Department of Energy under Contract
DE-AC36-08-GO28308 with the National Renewable Energy Laboratory.
NR 14
TC 8
Z9 8
U1 2
U2 9
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0093-9994
J9 IEEE T IND APPL
JI IEEE Trans. Ind. Appl.
PD SEP-OCT
PY 2013
VL 49
IS 5
DI 10.1109/TIA.2013.2261043
PG 9
WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic
SC Engineering
GA 223TG
UT WOS:000324832300030
ER
PT J
AU Hsu, YK
Yu, CH
Lin, HH
Chen, YC
Lin, YG
AF Hsu, Yu-Kuei
Yu, Chun-Hao
Lin, Hung-Hsun
Chen, Ying-Chu
Lin, Yan-Gu
TI Template synthesis of copper oxide nanowires for photoelectrochemical
hydrogen generation
SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY
LA English
DT Article
DE Copper oxide; Nanowires; Photoelectrochemistry; Template synthesis
ID WATER; FABRICATION; PHOTOCATHODES; ELECTRODES
AB The direct-grown p-type copper oxide nanowires on copper foil were fabricated via a facile and cost-effective template route for photoelectrochemical (PEC) hydrogen generation. The dense and curl-shaped copper oxide nanowires were carried out through thermal transformation of one-dimensional Cu(OH)(2). The effect of thermal treatment on structure and composition revealed the phase transformation to CuO and Cu2O within the nanowire matrix by examinations of XRD and XPS. Significantly, PEC characteristics illustrated that the high active photocathode of copper oxide nanowires can achieve the photocurrent of -1.3 mA cm(-2) at a potential of -0.4 V vs. Ag/AgCl, corresponding to the solar conversion efficiency of 1.3%. The photoresponse of this hybrid copper oxide nanowires widely extended in the near-infrared wavelength of 920 nm, which have great potential application for light-harvesting device. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
C1 [Hsu, Yu-Kuei; Yu, Chun-Hao; Lin, Hung-Hsun] Natl Dong Hwa Univ, Dept Optoelect Engn, Hualien 97401, Taiwan.
[Chen, Ying-Chu] Natl Taiwan Univ, Dept Chem Engn, Taipei 106, Taiwan.
[Lin, Yan-Gu] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA.
RP Hsu, YK (reprint author), Natl Dong Hwa Univ, Dept Optoelect Engn, Hualien 97401, Taiwan.
EM ykhsu@mail.ndhu.edu.tw
RI Hsu, Yu-Kuei/H-6591-2014
FU National Dong Hwa University; National Science Council of the Republic
of China, Taiwan [NSC 101-2221-E-259-011]
FX The authors would like to thank the National Dong Hwa University and the
National Science Council of the Republic of China, Taiwan, for
financially supporting this research under Contract No. NSC
101-2221-E-259-011.
NR 20
TC 17
Z9 17
U1 11
U2 137
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 1572-6657
J9 J ELECTROANAL CHEM
JI J. Electroanal. Chem.
PD SEP 1
PY 2013
VL 704
BP 19
EP 23
DI 10.1016/j.jelechem.2013.06.008
PG 5
WC Chemistry, Analytical; Electrochemistry
SC Chemistry; Electrochemistry
GA 221KV
UT WOS:000324658700003
ER
PT J
AU Pratt, HD
Ingersoll, D
Hudak, NS
McKenzie, BB
Anderson, TM
AF Pratt, Harry D., III
Ingersoll, David
Hudak, Nicholas S.
McKenzie, Bonnie B.
Anderson, Travis M.
TI Copper ionic liquids: Tunable ligand and anion chemistries to control
electrochemistry and deposition morphology
SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY
LA English
DT Article
DE Ionic liquids; Copper; Flow batteries; Electrodeposition; Dendrites
ID RESEARCH-AND-DEVELOPMENT; ELECTRODEPOSITION; CATALYSIS; COMPLEXES;
PROGRESS; CATIONS
AB A multi-technique investigation was performed on three copper-based ionic liquids to elucidate the influence of coordinating ligands and charge-balancing anions on the electrochemical properties of the materials. Galvanostatic cycling of Cu(OHCH2CH2NH2)(6)(BF4)(2) (Cu1) in 1-butyl-3-methyl-imidazolium hexafluorophosphate gave partially reversible plating of copper that was consistent with cyclic voltammetry data (collected using an ionic liquid-based reference electrode verified with measurements of ferrocene, cobaltocene, and lithium). Scanning electron microscopy also showed pitting in the copper-coated surface of the electrode that was consistent with the stripping wave observed by cyclic voltammetry. Potentiostatic deposition in neat Cu1 showed significant dendrite formation. The substitution of the OHCH2CH2NH2 ligands of Cu1 with stronger coordinating NH(CH2CH2OH)(2) in Cu(NH(CH2CH2OH)(2))(6)(BF4)(2) (Cu2) resulted in the complete suppression of both copper stripping and dendrite formation. Substitution of the BF4- anions of Cu2 with CF3SO3- in Cu(NH(CH2CH2OH)(2))(6)(CF3SO3)(2) (Cu3) shifted the copper deposition 0.1 V more negative and produced slightly larger spherical particles (1.5 mu m versus 5 mu m). The results suggested that while the anion composition influenced particle size, and the metal-ligand bond strength helped control particle morphology, both factors affected the electrochemical properties including the plating and stripping of copper. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Pratt, Harry D., III; Ingersoll, David; Hudak, Nicholas S.; McKenzie, Bonnie B.; Anderson, Travis M.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Anderson, TM (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM tmander@sandia.gov
RI Hudak, Nicholas/D-3529-2011
FU U.S. Department of Energy, Office of Electricity Delivery and Energy
Reliability; U.S. Department of Energy's National Nuclear Security
Administration [DE-AC04-94AL85000]
FX The authors would like to thank the U.S. Department of Energy, Office of
Electricity Delivery and Energy Reliability (Dr. Imre Gyuk, Energy
Storage Program) for funding and Mark Rodriguez, James Griego, William
R. Pratt and Mike Stoll for technical assistance. Sandia National
Laboratories is a multi-program laboratory operated by Sandia
Corporation, a wholly owned subsidiary of Lockheed Martin Company, for
the U.S. Department of Energy's National Nuclear Security Administration
under contract DE-AC04-94AL85000.
NR 25
TC 9
Z9 9
U1 4
U2 57
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 1572-6657
EI 1873-2569
J9 J ELECTROANAL CHEM
JI J. Electroanal. Chem.
PD SEP 1
PY 2013
VL 704
BP 153
EP 158
DI 10.1016/j.jelechem.2013.07.006
PG 6
WC Chemistry, Analytical; Electrochemistry
SC Chemistry; Electrochemistry
GA 221KV
UT WOS:000324658700022
ER
PT J
AU Yun, D
Stan, M
AF Yun, Di
Stan, Marius
TI Impact of high porosity on thermal transport in UO2 nuclear fuel
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID OXYGEN DIFFUSION; URANIUM-DIOXIDE; SOLID UO2; CONDUCTIVITY; HEAT;
RECOMMENDATIONS; SIMULATIONS; EXPANSION; EVOLUTION; MODEL
AB During the advance of the nuclear fission reaction, fission products accumulate and form pores (gas bubbles) that decrease the thermal conductivity of the nuclear fuel, potentially leading to overheating of the fuel element. To investigate this important phenomenon, a finite-element method is used to simulate the effect of 3-dimensional (3D) distributions of pores on the thermal transport in a nuclear fuel element consisting of uranium oxide (UO2) nuclear fuel pellet and Zircaloy cladding. Spherical pores ranging in size from 70 to 172 mu m are introduced to create up to 30 vol% total porosity. The simulations demonstrate that the centerline temperature increases with the total porosity and the increase is nonlinear. The results also show that the centerline temperature, at fixed total porosity, weakly depends on the pore size distribution. This method can provide useful information regarding the effect of high porosity levels that may occur in off-normal operation conditions.
C1 [Yun, Di; Stan, Marius] Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA.
RP Stan, M (reprint author), Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM mstan@anl.gov
FU US Department of Energy, Office of Science [DE-AC02-06CH11357]
FX This work was supported by the US Department of Energy, Office of
Science under Contract No. DE-AC02-06CH11357.
NR 30
TC 1
Z9 1
U1 3
U2 21
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0884-2914
J9 J MATER RES
JI J. Mater. Res.
PD SEP
PY 2013
VL 28
IS 17
BP 2308
EP 2315
DI 10.1557/jmr.2013.142
PG 8
WC Materials Science, Multidisciplinary
SC Materials Science
GA 217AN
UT WOS:000324328900013
ER
PT J
AU Chen-Wiegart, YCK
Wada, T
Butakov, N
Xiao, XH
De Carlo, F
Kato, H
Wang, J
Dunand, DC
Maire, E
AF Chen-Wiegart, Yu-chen Karen
Wada, Takeshi
Butakov, Nikita
Xiao, Xianghui
De Carlo, Francesco
Kato, Hidemi
Wang, Jun
Dunand, David C.
Maire, Eric
TI 3D morphological evolution of porous titanium by x-ray micro- and
nano-tomography
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID NANOPOROUS GOLD; DENDRITIC MICROSTRUCTURES
AB The 3D morphological evolution of titanium foams as they undergo a two-step fabrication process is quantitatively characterized through x-ray micro- and nano-tomography. In the first process step, a Cu-Ti-Cr-Zr prealloy is immersed in liquid Mg, where Cu is alloyed with Mg while a skeleton of crystalline Ti-Cr-Zr is created. In the second step, the Mg-Cu phase is etched in acid, leaving a Ti-Cr-Zr foam with submicron struts. 3D images of these solidified Ti-Cr-Zr/Mg-Cu composites and leached Ti-Cr-Zr foams are acquired after 5, 10, and 30 min exposure to liquid Mg. As the Mg exposure time increases, the Ti-Cr-Zr ligaments grow in size. The tortuosity loosely follows the Bruggeman relation. The interfacial surface distribution of these Ti-foams is qualitatively similar to other nano-porous metal prepared by one-step dealloying. The characteristic length of the Mg-Cu phase and pores are also reported.
C1 [Chen-Wiegart, Yu-chen Karen; Butakov, Nikita; Wang, Jun] Brookhaven Natl Lab, Photon Sci Directorate, Upton, NY 11973 USA.
[Wada, Takeshi; Kato, Hidemi] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan.
[Butakov, Nikita] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14261 USA.
[Xiao, Xianghui; De Carlo, Francesco] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Dunand, David C.] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
[Maire, Eric] Inst Natl Sci Appl, MATEIS Lab, F-69621 Lyon, France.
RP Wang, J (reprint author), Brookhaven Natl Lab, Photon Sci Directorate, Upton, NY 11973 USA.
EM junwang@bnl.gov
RI eric, maire/B-4296-2012; Dunand, David/B-7515-2009; Wada,
Takeshi/B-2431-2015; Kato, Hidemi/B-2492-2015;
OI Dunand, David/0000-0001-5476-7379; , eric/0000-0003-1952-2602
FU U.S. Department of Energy, Office of Basic Energy Sciences
[DE-AC02-98CH10886]; U.S. Department of Energy, Office of Science,
Office of Basic Energy Sciences [DE-AC02-98CH10886]; U.S. DOE
[DE-AC02-06CH11357]
FX We thank Dr. Fernando Camino (BNL) for assisting the development of the
sample preparation procedure using FIB/SEM. FIB-lift out sample
preparation was carried out at the Center for Functional Nanomaterials,
Brookhaven National Laboratory, which is supported by the U.S.
Department of Energy, Office of Basic Energy Sciences, under Contract
No. DE-AC02-98CH10886. Use of the National Synchrotron Light Source is
supported by the U.S. Department of Energy, Office of Science, Office of
Basic Energy Sciences, under Contract No. DE-AC02-98CH10886. Use of the
Advanced Photon Source, an Office of Science User Facility operated for
the U.S. Department of Energy (DOE) Office of Science by Argonne
National Laboratory, was supported by the U.S. DOE under Contract No.
DE-AC02-06CH11357.
NR 38
TC 4
Z9 4
U1 3
U2 52
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0884-2914
EI 2044-5326
J9 J MATER RES
JI J. Mater. Res.
PD SEP
PY 2013
VL 28
IS 17
BP 2444
EP 2452
DI 10.1557/jmr.2013.151
PG 9
WC Materials Science, Multidisciplinary
SC Materials Science
GA 217AN
UT WOS:000324328900028
ER
PT J
AU Gardner, SN
Thissen, JB
McLoughlin, KS
Slezak, T
Jaing, CJ
AF Gardner, Shea N.
Thissen, James B.
McLoughlin, Kevin S.
Slezak, Tom
Jaing, Crystal J.
TI Optimizing SNP microarray probe design for high accuracy microbial
genotyping
SO JOURNAL OF MICROBIOLOGICAL METHODS
LA English
DT Article
DE SNP microarrays; SNP detection; Microbial genotyping; Probe design
optimization; Strain typing; Bacillus anthracis
ID ARRAY; VERSATILE; SOFTWARE
AB Microarrays to characterize single nucleotide polymorphisms (SNPs) provide a cost-effective and rapid method (under 24 h) to genotype microbes as an alternative to sequencing. We developed a pipeline for SNP discovery and microarray design that scales to 100's of microbial genomes. Here we tested various SNP probe design strategies against 8 sequenced isolates of Bacillus anthracis to compare sequence and microarray data. The best strategy allowed probe length to vary within 32-40 bp to equalize hybridization free energy. This strategy resulted in a call rate of 99.52% and concordance rate of 99.86% for finished genomes. Other probe design strategies averaged substantially lower call rates (94.65-96.41%) and slightly lower concordance rates (99.64-99.80%). These rates were lower for draft than finished genomes, consistent with higher incidence of sequencing errors and gaps. Highly accurate SNP calls were possible in complex soil and blood backgrounds down to 1000 copies, and moderately accurate SNP calls down to 100 spiked copies. The closest genome to the spiked strain was correctly identified at only 10 spiked copies. Discrepancies between sequence and array data did not alter the SNP-based phylogeny, regardless of the probe design strategy, indicating that SNP arrays can accurately place unsequenced isolates on a phylogeny. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.
C1 [Gardner, Shea N.; Thissen, James B.; McLoughlin, Kevin S.; Slezak, Tom; Jaing, Crystal J.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Gardner, SN (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM gardner26@LLNL.gov
OI McLoughlin, Kevin/0000-0001-9651-4951; Thissen,
James/0000-0002-4693-5886
FU Department of Homeland Security Bioforensics program
[HSHQPM-10-X-00078/P00001]; U.S. Department of Energy by Lawrence
Livermore National Laboratory [DE-AC52-07NA27344]
FX The authors want to thank LLNL and Kris Montgomery for providing the B.
anthracis genomic DNA samples. This work was supported by the Department
of Homeland Security Bioforensics program through contract
HSHQPM-10-X-00078/P00001 to Lawrence Livermore National Laboratory. This
work performed under the auspices of the U.S. Department of Energy by
Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
NR 22
TC 8
Z9 8
U1 0
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-7012
J9 J MICROBIOL METH
JI J. Microbiol. Methods
PD SEP
PY 2013
VL 94
IS 3
BP 303
EP 310
DI 10.1016/j.mimet.2013.07.006
PG 8
WC Biochemical Research Methods; Microbiology
SC Biochemistry & Molecular Biology; Microbiology
GA 221NB
UT WOS:000324664500024
PM 23871857
ER
PT J
AU Baer, DR
Engelhard, MH
Johnson, GE
Laskin, J
Lai, JF
Mueller, K
Munusamy, P
Thevuthasan, S
Wang, HF
Washton, N
Elder, A
Baisch, BL
Karakoti, A
Kuchibhatla, SVNT
Moon, D
AF Baer, Donald R.
Engelhard, Mark H.
Johnson, Grant E.
Laskin, Julia
Lai, Jinfeng
Mueller, Karl
Munusamy, Prabhakaran
Thevuthasan, Suntharampillai
Wang, Hongfei
Washton, Nancy
Elder, Alison
Baisch, Brittany L.
Karakoti, Ajay
Kuchibhatla, Satyanarayana V. N. T.
Moon, DaeWon
TI Surface characterization of nanomaterials and nanoparticles: Important
needs and challenging opportunities
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
LA English
DT Review
ID SUM-FREQUENCY GENERATION; X-RAY PHOTOELECTRON;
AUGER-ELECTRON-SPECTROSCOPY; METAL-OXIDE NANOPARTICLES; MASS-SELECTED
IONS; GOLD NANOPARTICLES; CARBON NANOTUBES; XPS ANALYSIS; BIOMEDICAL
APPLICATIONS; RESONANCE-ABSORPTION
AB This review examines characterization challenges inherently associated with understanding nanomaterials and the roles surface and interface characterization methods can play in meeting some of the challenges. In parts of the research community, there is growing recognition that studies and published reports on the properties and behaviors of nanomaterials often have reported inadequate or incomplete characterization. As a consequence, the true value of the data in these reports is, at best, uncertain. With the increasing importance of nanomaterials in fundamental research and technological applications, it is desirable that researchers from the wide variety of disciplines involved recognize the nature of these often unexpected challenges associated with reproducible synthesis and characterization of nanomaterials, including the difficulties of maintaining desired materials properties during handling and processing due to their dynamic nature. It is equally valuable for researchers to understand how characterization approaches (surface and otherwise) can help to minimize synthesis surprises and to determine how (and how quickly) materials and properties change in different environments. Appropriate application of traditional surface sensitive analysis methods (including x-ray photoelectron and Auger electron spectroscopies, scanning probe microscopy, and secondary ion mass spectroscopy) can provide information that helps address several of the analysis needs. In many circumstances, extensions of traditional data analysis can provide considerably more information than normally obtained from the data collected. Less common or evolving methods with surface selectivity (e. g., some variations of nuclear magnetic resonance, sum frequency generation, and low and medium energy ion scattering) can provide information about surfaces or interfaces in working environments (operando or in situ) or information not provided by more traditional methods. Although these methods may require instrumentation or expertise not generally available, they can be particularly useful in addressing specific questions, and examples of their use in nanomaterial research are presented. (C) 2013 American Vacuum Society.
C1 [Baer, Donald R.; Engelhard, Mark H.; Johnson, Grant E.; Laskin, Julia; Lai, Jinfeng; Mueller, Karl; Munusamy, Prabhakaran; Thevuthasan, Suntharampillai; Wang, Hongfei; Washton, Nancy] Pacific NW Natl Lab, EMSL, Richland, WA 99352 USA.
[Elder, Alison; Baisch, Brittany L.] Univ Rochester, Dept Environm Med, Rochester, NY USA.
[Karakoti, Ajay; Kuchibhatla, Satyanarayana V. N. T.] Battelle Sci & Technol India, Pune, Maharashtra, India.
[Moon, DaeWon] Daegu Gyeongbuk Inst Sci & Technol, Daeju, South Korea.
RP Baer, DR (reprint author), Pacific NW Natl Lab, EMSL, POB 999, Richland, WA 99352 USA.
EM don.baer@pnnl.gov
RI Wang, Hongfei/B-1263-2010; Baer, Donald/J-6191-2013; munusamy,
prabhakaran/G-4598-2014; Mueller, Karl/A-3637-2010; Laskin,
Julia/H-9974-2012;
OI Wang, Hongfei/0000-0001-8238-1641; Baer, Donald/0000-0003-0875-5961;
Laskin, Julia/0000-0002-4533-9644; Engelhard, Mark/0000-0002-5543-0812;
Johnson, Grant/0000-0003-3352-4444
FU DOE-BER; DOE's offices of Basic Energy Science (BES); BER; NIEHS [U19
ES019544, P30 ES01247]; Linus Pauling Fellowship; PNNL's Laboratory
Directed Research and Development Program; [T32 ES07026]
FX This article has evolved from research programs, research conducted as
part of the EMSL User Program (http://www.emsl.pnnl.gov/emslweb/), and
interactions with colleagues from around the world. DRB in particular
thanks Justin Teeguarden, Joel Pounds, and Brian Thrall and the other
members of the NIEHS U19 consortium, as well as colleagues from ASTM
Committee E42 on Surface Analysis and ISO Committees TC201 Surface
Chemical Analysis and TC229 Nanotechnology. Portions of this work were
performed using EMSL, a national scientific user facility sponsored by
DOE-BER and located at PNNL. Aspects of the work have been supported by
the DOE's offices of Basic Energy Science (BES) and BER and the NIEHS
under Center grants U19 ES019544 and P30 ES01247, as well as a training
grant (T32 ES07026). G.E.J. acknowledges support from the Linus Pauling
Fellowship and PNNL's Laboratory Directed Research and Development
Program.
NR 177
TC 39
Z9 40
U1 9
U2 200
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0734-2101
EI 1520-8559
J9 J VAC SCI TECHNOL A
JI J. Vac. Sci. Technol. A
PD SEP
PY 2013
VL 31
IS 5
AR 050820
DI 10.1116/1.4818423
PG 34
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA 217UZ
UT WOS:000324388800020
PM 24482557
ER
PT J
AU Parsons, GN
Elam, JW
George, SM
Haukka, S
Jeon, H
Kessels, WMM
Leskela, M
Poodt, P
Ritala, M
Rossnagel, SM
AF Parsons, Gregory N.
Elam, Jeffrey W.
George, Steven M.
Haukka, Suvi
Jeon, Hyeongtag
Kessels, W. M. M. (Erwin)
Leskela, Markku
Poodt, Paul
Ritala, Mikko
Rossnagel, Steven M.
TI History of atomic layer deposition and its relationship with the
American Vacuum Society
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
LA English
DT Review
ID SENSITIZED SOLAR-CELLS; INTERNATIONAL-SYMPOSIUM; SURFACE MODIFICATION;
EPITAXY; AL2O3; GROWTH; TETRACHLORIDE; POLYMERS; PLASMA
AB This article explores the history of atomic layer deposition (ALD) and its relationship with the American Vacuum Society (AVS). The authors describe the origin and history of ALD science in the 1960s and 1970s. They also report on how the science and technology of ALD progressed through the 1990s and 2000s and continues today. This article focuses on how ALD developed within the AVS and continues to evolve through interactions made possible by the AVS, in particular, the annual International AVS ALD Conference. This conference benefits students, academics, researchers, and industry practitioners alike who seek to understand the fundamentals of self-limiting, alternating binary surface reactions, and how they can be applied to form functional (and sometimes profitable) thin film materials. The flexible structure of the AVS allowed the AVS to quickly organize the ALD community and create a primary conference home. Many new research areas have grown out of the original concepts of "Atomic Layer Epitaxy" and "Molecular Layering," and some of them are described in this article. The people and research in the ALD field continue to evolve, and the AVS ALD Conference is a primary example of how the AVS can help a field expand and flourish. (C) 2013 American Vacuum Society.
C1 [Parsons, Gregory N.] N Carolina State Univ, Dept Chem & Biomol Engn, Raleigh, NC 27695 USA.
[Elam, Jeffrey W.] Argonne Natl Lab, Argonne, IL 60439 USA.
[George, Steven M.] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA.
[George, Steven M.] Univ Colorado, Dept Chem & Biol Engn, Boulder, CO 80309 USA.
[Haukka, Suvi] ASM Microchem Ltd, FI-00560 Helsinki, Finland.
[Jeon, Hyeongtag] Hanyang Univ, Div Mat Sci & Engn, Seoul 133791, South Korea.
[Kessels, W. M. M. (Erwin)] Eindhoven Univ Technol, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands.
[Leskela, Markku; Ritala, Mikko] Univ Helsinki, Dept Chem, FI-00014 Helsinki, Finland.
[Poodt, Paul] Holst Ctr TNO, NL-5600 HE Eindhoven, Netherlands.
[Rossnagel, Steven M.] IBM TJ Watson Res Ctr, Yorktown Hts, NY 10598 USA.
RP Parsons, GN (reprint author), N Carolina State Univ, Dept Chem & Biomol Engn, Raleigh, NC 27695 USA.
EM parsons@ncsu.edu
RI Ritala, Mikko/N-7268-2013; George, Steven/O-2163-2013; Parsons,
Gregory/O-9762-2014; Jeon, Hyeongtag/P-3193-2015;
OI Ritala, Mikko/0000-0002-6210-2980; George, Steven/0000-0003-0253-9184;
Parsons, Gregory/0000-0002-0048-5859; Jeon,
Hyeongtag/0000-0003-2502-7413; Leskela, Markku/0000-0001-5830-2800
FU Center for Electrical Energy Storage: Tailored Interfaces, an Energy
Frontier Research Center; U.S. Department of Energy, Office of Science,
Office of Basic Energy Sciences; Institute for Atom-efficient Chemical
Transformations (IACT), an Energy Frontier Research Center
FX J.W.E. was supported by the Center for Electrical Energy Storage:
Tailored Interfaces, an Energy Frontier Research Center funded by the
U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences, and by the Institute for Atom-efficient Chemical
Transformations (IACT), an Energy Frontier Research Center funded by the
U.S. Department of Energy, Office of Science, Office of Basic Energy
Sciences.
NR 50
TC 20
Z9 20
U1 4
U2 93
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0734-2101
J9 J VAC SCI TECHNOL A
JI J. Vac. Sci. Technol. A
PD SEP
PY 2013
VL 31
IS 5
AR 050818
DI 10.1116/1.4816548
PG 11
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA 217UZ
UT WOS:000324388800018
ER
PT J
AU Cao, GH
Liu, N
Peng, JC
Li, X
Shen, GJ
Russell, AM
AF Cao, G. H.
Liu, N.
Peng, J. C.
Li, X.
Shen, G. J.
Russell, A. M.
TI Transmission electron microscopy study of the microstructure of a
Ti-Fe-Zr alloy
SO MATERIALS CHARACTERIZATION
LA English
DT Article
DE Ti-Fe-Zr alloy; Microstructure; Transmission electron microscopy (TEM)
ID HIGH-STRENGTH; ULTRAFINE COMPOSITES; ENHANCED DUCTILITY; PLASTICITY
AB A Ti-35Fe-30Zr (at.%) alloy was prepared by cold crucible levitation melting, and its microstructure was characterized. Electron microscope observations revealed a microstructure with a bi-modal phase size distribution. One phase was identified as a monoclinic TiFeZr compound with lattice parameters a = 0.895 nm, b = 0.502 nm, c = 0.969 nm, and alpha = 119.4 degrees in C2 (space group). A bcc beta-TiZr phase with lattice parameter a = 0.341 nm coexisted with the monoclinic phase. The mechanisms of phase formation are discussed. (C) 2013 Elsevier Inc. All rights reserved.
C1 [Cao, G. H.; Liu, N.; Li, X.] Shanghai Univ, Dept Mat Engn, Shanghai 200072, Peoples R China.
[Peng, J. C.] Shanghai Univ, Inst Mat, Shanghai 200072, Peoples R China.
[Shen, G. J.] Southeast Univ, Anal & Testing Ctr, Nanjing 211189, Jiangsu, Peoples R China.
[Russell, A. M.] US DOE, Div Mat Sci & Engn, Ames Lab, Ames, IA 50011 USA.
[Russell, A. M.] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Cao, GH (reprint author), Shanghai Univ, Dept Mat Engn, Shanghai 200072, Peoples R China.
EM ghcao@shu.edu.cn
OI Russell, Alan/0000-0001-5264-0104
FU Shanghai Committee of Science and Technology [11520701200, 10JC1405100];
Innovation Program of Shanghai Municipal Education Commission [13ZZ077];
National Natural Science Foundation of China (NSFC) [51271107]; Program
for Professor of Special Appointment (Eastern Scholar) at Shanghai
Institutions of Higher Learning; US Department of Energy by Iowa State
University [DE-AC02-07CH11358]
FX This work was supported by the Shanghai Committee of Science and
Technology under Grant Nos. 11520701200 and 10JC1405100, the Innovation
Program of Shanghai Municipal Education Commission under Grant No.
13ZZ077, the National Natural Science Foundation of China (NSFC) under
Grant 51271107, and the Program for Professor of Special Appointment
(Eastern Scholar) at Shanghai Institutions of Higher Learning. The Ames
Laboratory is operated for the US Department of Energy by Iowa State
University under Contract No. DE-AC02-07CH11358.
NR 18
TC 3
Z9 3
U1 1
U2 25
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1044-5803
J9 MATER CHARACT
JI Mater. Charact.
PD SEP
PY 2013
VL 83
BP 43
EP 48
DI 10.1016/j.matchar.2013.06.003
PG 6
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Materials Science, Characterization & Testing
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 220RV
UT WOS:000324605500005
ER
PT J
AU Rong, LB
Perelson, AS
AF Rong, Libin
Perelson, Alan S.
TI Mathematical analysis of multiscale models for hepatitis C virus
dynamics under therapy with direct-acting antiviral agents
SO MATHEMATICAL BIOSCIENCES
LA English
DT Article; Proceedings Paper
CT 4th International Conference on BIOCOMP - Mathematical Modeling and
Computational Topics in Biosciences Dedicated to the Memory of Luigi M.
Ricciardi (1942-2011)
CY JUN 04-08, 2012
CL Vietri sul Mare, ITALY
DE Hepatitis C virus; Multiscale model; Age-structured model; Stability;
Intracellular viral RNA; Antiviral therapy; Viral kinetics
ID VIRAL KINETICS; PEGYLATED INTERFERON; PROTEASE INHIBITOR; NS5A
INHIBITOR; HCV INFECTION; RIBAVIRIN; COMBINATION; IFN; RNA; REPLICATION
AB Chronic hepatitis C virus (HCV) infection remains a world-wide public health problem. Therapy with interferon and ribavirin leads to viral elimination in less than 50% of treated patients. New treatment options aiming at a higher cure rate are focused on direct-acting antiviral agents (DAAs), which directly interfere with different steps in the HCV life cycle. In this paper, we describe and analyze a recently developed multiscale model that predicts HCV dynamics under therapy with DAAs. The model includes both intracellular viral RNA replication and extracellular viral infection. We calculate the steady states of the model and perform a detailed stability analysis. With certain assumptions we obtain analytical approximations of the viral load decline after treatment initiation. One approximation agrees well with the prediction of the model, and can conveniently be used to fit patient data and estimate parameter values. We also discuss other possible ways to incorporate intracellular viral dynamics into the multiscale model. (C) 2013 Elsevier Inc. All rights reserved.
C1 [Rong, Libin] Oakland Univ, Dept Math & Stat, Rochester, MI 48309 USA.
[Perelson, Alan S.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Perelson, AS (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM asp@lanl.gov
FU NHLBI NIH HHS [HL109334, R34 HL109334]; NIAID NIH HHS [AI028433,
AI07881, R01 AI028433, R01 AI078881, R37 AI028433]; NIH HHS [OD011095,
R01 OD011095]
NR 45
TC 9
Z9 9
U1 0
U2 13
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0025-5564
J9 MATH BIOSCI
JI Math. Biosci.
PD SEP
PY 2013
VL 245
IS 1
SI SI
BP 22
EP 30
DI 10.1016/j.mbs.2013.04.012
PG 9
WC Biology; Mathematical & Computational Biology
SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational
Biology
GA 221OK
UT WOS:000324668000004
PM 23684949
ER
PT J
AU Wu, WT
Aubry, N
Massoudi, M
AF Wu, Wei-Tao
Aubry, Nadine
Massoudi, Mehrdad
TI Flow of granular materials modeled as a non-linear fluid
SO MECHANICS RESEARCH COMMUNICATIONS
LA English
DT Article
DE Non-linear fluids; Reiner-Rivlin fluid; Inclined flow; Volume fraction;
Granular materials
ID INCLINED PLANE; GRAVITY FLOW; MECHANICS; CHUTES; LAW
AB Recently, Massoudi (2011a) derived a generalized form of a constitutive relation related to Reiner's fluid model for wet sand, where not only the effects of volume fraction are incorporated in the theological properties of the fluid, but also the shear viscosity depends on the shear rate. In this paper, we use this model to study the fully developed flow of granular-like materials down an inclined plane. The governing equations are made dimensionless and numerical solutions are presented for the various dimensionless parameters. Published by Elsevier Ltd.
C1 [Wu, Wei-Tao] Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA.
[Aubry, Nadine] Northeastern Univ, Dept Mech Engn, Boston, MA 02115 USA.
[Massoudi, Mehrdad] US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
RP Massoudi, M (reprint author), US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
EM mehrdad.massoudi@netl.doe.gov
NR 31
TC 0
Z9 0
U1 0
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0093-6413
J9 MECH RES COMMUN
JI Mech. Res. Commun.
PD SEP
PY 2013
VL 52
BP 62
EP 68
DI 10.1016/j.mechrescom.2013.06.008
PG 7
WC Mechanics
SC Mechanics
GA 221OV
UT WOS:000324669100010
ER
PT J
AU Zan, YL
Boutchko, R
Huang, Q
Li, B
Chen, KW
Gullberg, GT
AF Zan, Yunlong
Boutchko, Rostyslav
Huang, Qiu
Li, Biao
Chen, Kewei
Gullberg, Grant T.
TI Fast direct estimation of the blood input function and myocardial time
activity curve from dynamic SPECT projections via reduction in spatial
and temporal dimensions
SO MEDICAL PHYSICS
LA English
DT Article
DE dynamic SPECT; slow-rotation; reduction in spatial and temporal
dimensions; B-spline; ML-EM
ID EMISSION COMPUTED-TOMOGRAPHY; KINETIC-PARAMETERS; TC-99M-ECD SPECT;
XE-133 GAS; PET; QUANTIFICATION; RECONSTRUCTION; TEBOROXIME; DSPECT;
SYSTEM
AB Purpose: Reconstruction of parametric images from dynamic single photon emission computed tomography (SPECT) data acquired with slow rotating cameras is a challenge because the estimation of the time-activity curves (TACs) may involve fitting data to an inconsistent underdetermined system of equations. This work presents a novel algorithm for the estimation of the blood input function and myocardial TAC with high accuracy and high efficiency directly from these projections.
Methods: In the proposed dynamic reconstruction method, the information from the segmentation of functional regions from the static reconstructed image was used as a prior to construct a sparse matrix, through which the spatial distribution of the radioactive tracer was represented. Then the temporal distribution of the radioactive tracer was modeled by nonuniform B-spline basis functions which were determined according to a new selection rule. With reduction in both the spatial and temporal dimensions of the reconstructed image, the blood input function and myocardial TAC were estimated using the 4D maximum likelihood expectation maximization algorithm. The method was validated using data from both digital phantom simulations and an experimental rat study.
Results: Compared with the conventional dynamic SPECT reconstruction method without the reduction in spatial dimensions, the proposed method provides more accurate TACs with less computation time in both phantom simulation studies and a rat experimental study.
Conclusions: The proposed method is promising in both providing more accurate time-activity curves and reducing the computation time, which makes it practical for small animal studies using clinical systems with slow rotating cameras. (C) 2013 American Association of Physicists in Medicine.
C1 [Zan, Yunlong; Huang, Qiu; Chen, Kewei] Shanghai Jiao Tong Univ, Sch Biomed Engn, Shanghai 200030, Peoples R China.
[Zan, Yunlong; Huang, Qiu; Li, Biao] Shanghai Jiao Tong Univ, Sch Med, Rui Jin Hosp, Shanghai 200030, Peoples R China.
[Boutchko, Rostyslav; Gullberg, Grant T.] Lawrence Berkeley Natl Lab, Berkeley, CA 94702 USA.
[Chen, Kewei] Banner Good Samaritan Med Ctr, Phoenix, AZ 85006 USA.
RP Zan, YL (reprint author), Shanghai Jiao Tong Univ, Sch Biomed Engn, Shanghai 200030, Peoples R China.
EM qiuhuang@sjtu.edu.cn; lb10363@rjh.com.cn
RI Chen, kewei/P-6304-2015
OI Chen, kewei/0000-0001-8497-3069
FU National Science Foundation of China [81201114, 81271610]; NIH [R01
HL50663, R01 EB07219]; Office of Science, Office of Biological and
Environmental Research of the US Department of Energy
[DE-AC02-05CH11231]
FX This work is funded by the National Science Foundation of China (Nos.
81201114 and 81271610) and by NIH Grant Nos. R01 HL50663 and R01 EB07219
and by the Director, Office of Science, Office of Biological and
Environmental Research of the US Department of Energy under contract
DE-AC02-05CH11231.
NR 33
TC 7
Z9 7
U1 0
U2 10
PU AMER ASSOC PHYSICISTS MEDICINE AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0094-2405
J9 MED PHYS
JI Med. Phys.
PD SEP
PY 2013
VL 40
IS 9
AR 092503
DI 10.1118/1.4816944
PG 10
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA 216CV
UT WOS:000324259800048
PM 24007179
ER
PT J
AU Bae, WK
Brovelli, S
Klimov, VI
AF Bae, Wan Ki
Brovelli, Sergio
Klimov, Victor I.
TI Spectroscopic insights into the performance of quantum dot
light-emitting diodes
SO MRS BULLETIN
LA English
DT Article
ID ORGANIC ELECTROLUMINESCENT DEVICES; CDSE/CDS CORE/SHELL NANOCRYSTALS;
CORE-SHELL INTERFACE; HOT-CARRIER TRANSFER; SEMICONDUCTOR NANOCRYSTALS;
AUGER RECOMBINATION; ENERGY-TRANSFER; COLLOIDAL NANOCRYSTALS; CHARGE
INJECTION; BLINKING
AB Lighting consumes almost one-fifth of all electricity generated today. In principle, with more efficient light sources replacing incandescent lamps, this demand can be reduced at least twofold. A dramatic improvement in lighting efficiency is possible by replacing traditional incandescent bulbs with light-emitting diodes (LEDs) in which current is directly converted into photons via the process of electroluminescence. The focus of this article is on the emerging technology of LEDs that use solution-processed semiconductor quantum dots (QDs) as light emitters. QDs are nano-sized semiconductor particles whose emission color can be tuned by simply changing their dimensions. They feature near-unity emission quantum yields and narrow emission bands, which result in excellent color purity. Here, we review spectroscopic studies of QDs that address the problem of nonradiative carrier losses in QD-LEDs and approaches for its mitigation via the appropriate design of QD emitters. An important conclusion of our studies is that the realization of high-performance LEDs might require a new generation of QDs that in addition to being efficient single-exciton emitters would also show high emission efficiency in the multicarrier regime.
C1 [Bae, Wan Ki; Klimov, Victor I.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
[Brovelli, Sergio] Univ Milano Bicocca, Dept Mat Sci, Milan, Italy.
RP Bae, WK (reprint author), Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
EM wbae@lanl.gov; sergio.brovelli@unimib.it; klimov@lanl.gov
RI Arumugam, Thirumagal/C-3408-2014;
OI Brovelli, Sergio/0000-0002-5993-855X; Klimov, Victor/0000-0003-1158-3179
FU Chemical Sciences, Biosciences, and Geosciences Division of Office of
Science, Office of Basic Energy Sciences, US Department of Energy
FX This work was supported by the Chemical Sciences, Biosciences, and
Geosciences Division of Office of Science, Office of Basic Energy
Sciences, US Department of Energy.
NR 92
TC 27
Z9 27
U1 3
U2 73
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0883-7694
EI 1938-1425
J9 MRS BULL
JI MRS Bull.
PD SEP
PY 2013
VL 38
IS 9
BP 721
EP 730
DI 10.1557/mrs.2013.182
PG 10
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 217RL
UT WOS:000324377400017
ER
PT J
AU Jochem, WC
Sims, K
Bright, EA
Urban, ML
Rose, AN
Coleman, PR
Bhaduri, BL
AF Jochem, Warren C.
Sims, Kelly
Bright, Edward A.
Urban, Marie L.
Rose, Amy N.
Coleman, Phillip R.
Bhaduri, Budhendra L.
TI Estimating traveler populations at airport and cruise terminals for
population distribution and dynamics
SO NATURAL HAZARDS
LA English
DT Article
DE LandScan USA; Population distribution and dynamics; Transitional
population; Airport; Cruise port; Simulation
AB In recent years, uses of high-resolution population distribution databases are increasing steadily for environmental, socioeconomic, public health, and disaster-related research and operations. With the development of daytime population distribution, temporal resolution of such databases has been improved. However, the lack of incorporation of transitional population, namely business and leisure travelers, leaves a significant population unaccounted for within the critical infrastructure networks, such as at transportation hubs. This paper presents two general methodologies for estimating passenger populations in airport and cruise port terminals at a high temporal resolution which can be incorporated into existing population distribution models. The methodologies are geographically scalable and are based on, and demonstrate how, two different transportation hubs with disparate temporal population dynamics can be modeled utilizing publicly available databases including novel data sources of flight activity from the Internet which are updated in near-real time. The airport population estimation model shows great potential for rapid implementation for a large collection of airports on a national scale, and the results suggest reasonable accuracy in the estimated passenger traffic. By incorporating population dynamics at high temporal resolutions into population distribution models, we hope to improve the estimates of populations exposed to or at risk to disasters, thereby improving emergency planning and response, and leading to more informed policy decisions.
C1 [Jochem, Warren C.; Sims, Kelly; Bright, Edward A.; Urban, Marie L.; Rose, Amy N.; Coleman, Phillip R.; Bhaduri, Budhendra L.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Bhaduri, BL (reprint author), Oak Ridge Natl Lab, POB 2008,MS 6017, Oak Ridge, TN 37831 USA.
EM bhaduribl@ornl.gov
OI Sims, Kelly/0000-0002-9349-4542
FU UT-Battelle, LLC [DE-AC05-00OR22725]; US Government
FX This manuscript has been authored by employees of UT-Battelle, LLC,
under contract DE-AC05-00OR22725 with the U.S. Department of Energy.
Accordingly, the United States Government retains and the publisher, by
accepting the article for publication, acknowledges that the United
States Government retains a non-exclusive, paid-up, irrevocable,
worldwide license to publish or reproduce the published form of this
manuscript or allows others to do so, for United States Government
purposes. The authors would like to acknowledge the financial support
for this research from the US Government for the development of LandScan
USA model and database. Significant improvement to the manuscript was
made possible by critical insights from two anonymous reviewers, and the
authors sincerely thank them for their assistance. The assistance of
Jessica Moehl with the development of figures and Ashton Brannon with
general editing is greatly appreciated.
NR 32
TC 2
Z9 2
U1 3
U2 19
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0921-030X
EI 1573-0840
J9 NAT HAZARDS
JI Nat. Hazards
PD SEP
PY 2013
VL 68
IS 3
BP 1325
EP 1342
DI 10.1007/s11069-012-0441-9
PG 18
WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences;
Water Resources
SC Geology; Meteorology & Atmospheric Sciences; Water Resources
GA 221JI
UT WOS:000324653900007
ER
PT J
AU Bai, Y
Zhou, KH
Doudna, JA
AF Bai, Yun
Zhou, Kaihong
Doudna, Jennifer A.
TI Hepatitis C virus 3 ' UTR regulates viral translation through direct
interactions with the host translation machinery
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID CAP-INDEPENDENT TRANSLATION; INTERNAL RIBOSOMAL ENTRY; SINGLE-NUCLEOTIDE
RESOLUTION; MESSENGER-RNA RECRUITMENT; 3'-UNTRANSLATED REGION;
INITIATION-FACTOR; ENHANCES TRANSLATION; UNTRANSLATED REGION; EUKARYOTIC
RIBOSOME; IRES
AB The 3' untranslated region (3'UTR) of hepatitis C virus (HCV) messenger RNA stimulates viral translation by an undetermined mechanism. We identified a high affinity interaction, conserved among different HCV genotypes, between the HCV 3'UTR and the host ribosome. The 3'UTR interacts with 40S ribosomal subunit proteins residing primarily in a localized region on the 40S solvent-accessible surface near the messenger RNA entry and exit sites. This region partially overlaps with the site where the HCV internal ribosome entry site was found to bind, with the internal ribosome entry site-40S subunit interaction being dominant. Despite its ability to bind to 40S subunits independently, the HCV 3'UTR only stimulates translation in cis, without affecting the first round translation rate. These observations support a model in which the HCV 3'UTR retains ribosome complexes during translation termination to facilitate efficient initiation of subsequent rounds of translation.
C1 [Bai, Yun; Doudna, Jennifer A.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
[Zhou, Kaihong; Doudna, Jennifer A.] Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
[Doudna, Jennifer A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Doudna, Jennifer A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Doudna, JA (reprint author), Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
EM doudna@berkeley.edu
FU National Institutes of Health (NIH); Howard Hughes Medical Institute
(HHMI)
FX National Institutes of Health (NIH); the Howard Hughes Medical Institute
(HHMI). J.A.D. is a HHMI investigator. Funding for open access charge:
HHMI.
NR 48
TC 21
Z9 21
U1 0
U2 17
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD SEP
PY 2013
VL 41
IS 16
BP 7861
EP 7874
DI 10.1093/nar/gkt543
PG 14
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 228GG
UT WOS:000325173300032
PM 23783572
ER
PT J
AU Rutherford, K
Yuan, P
Perry, K
Sharp, R
Van Duyne, GD
AF Rutherford, Karen
Yuan, Peng
Perry, Kay
Sharp, Robert
Van Duyne, Gregory D.
TI Attachment site recognition and regulation of directionality by the
serine integrases
SO NUCLEIC ACIDS RESEARCH
LA English
DT Article
ID C-TERMINAL DOMAIN; PHI-C31 INTEGRASE; DNA-BINDING; RECOMBINATION SYSTEM;
METHICILLIN-RESISTANCE; CENTRAL DINUCLEOTIDE; ESCHERICHIA-COLI; PHIC31
INTEGRASE; BXB1 INTEGRATION; PHAGE INTEGRASES
AB Serine integrases catalyze the integration of bacteriophage DNA into a host genome by site-specific recombination between 'attachment sites' in the phage (attP) and the host (attB). The reaction is highly directional; the reverse excision reaction between the product attL and attR sites does not occur in the absence of a phage-encoded factor, nor does recombination occur between other pairings of attachment sites. A mechanistic understanding of how these enzymes achieve site-selectivity and directionality has been limited by a lack of structural models. Here, we report the structure of the C-terminal domains of a serine integrase bound to an attP DNA half-site. The structure leads directly to models for understanding how the integrase-bound attP and attB sites differ, why these enzymes preferentially form attP x attB synaptic complexes to initiate recombination, and how attL x attR recombination is prevented. In these models, different domain organizations on attP vs. attB half-sites allow attachment-site specific interactions to form between integrase subunits via an unusual protruding coiled-coil motif. These interactions are used to preferentially synapse integrase-bound attP and attB and inhibit synapsis of integrase-bound attL and attR. The results provide a structural framework for understanding, testing and engineering serine integrase function.
C1 [Rutherford, Karen; Yuan, Peng; Sharp, Robert; Van Duyne, Gregory D.] Univ Penn, Dept Biochem & Biophys, Perelman Sch Med, Philadelphia, PA 19104 USA.
[Perry, Kay] Cornell Univ, NE CAT, Argonne Natl Lab, Argonne, IL 60439 USA.
[Perry, Kay] Cornell Univ, Dept Chem & Chem Biol, Argonne Natl Lab, Argonne, IL 60439 USA.
RP Van Duyne, GD (reprint author), Univ Penn, Dept Biochem & Biophys, Perelman Sch Med, Philadelphia, PA 19104 USA.
EM vanduyne@mail.med.upenn.edu
OI Perry, Kay/0000-0002-4046-1704
FU NCRR [2P41RR008630-17]; NIGMS [9 P41 GM103622-17, P41-GM103311]
FX The APS NE-CAT beamline is supported by grants from the NCRR
[2P41RR008630-17] and NIGMS [9 P41 GM103622-17]; UCSF Chimera is
supported by NIGMS [P41-GM103311]. Funding for open access charge:
Internal funds (Endowed Chair).
NR 57
TC 20
Z9 20
U1 1
U2 14
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0305-1048
J9 NUCLEIC ACIDS RES
JI Nucleic Acids Res.
PD SEP
PY 2013
VL 41
IS 17
BP 8341
EP 8356
DI 10.1093/nar/gkt580
PG 16
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 228HF
UT WOS:000325175900036
PM 23821671
ER
PT J
AU Matzen, LE
Benjamin, AS
AF Matzen, Laura E.
Benjamin, Aaron S.
TI Older and Wiser: Older Adults' Episodic Word Memory Benefits From
Sentence Study Contexts
SO PSYCHOLOGY AND AGING
LA English
DT Article
DE aging; false memory; context effects; conjunction errors; semantic
errors
ID AGE-RELATED DIFFERENCES; SHORT-TERM RECALL; FALSE MEMORIES; RECOLLECTION
REJECTION; RECOGNITION MEMORY; CONJUNCTION ERRORS; REMEMBERING WORDS;
DRYAD THEORY; YOUNGER; REPETITION
AB A hallmark of adaptive cognition is the ability to modulate learning in response to the demands posed by different types of tests and different types of materials. Here we evaluate how older adults process out-of-context words and sentences differently by examining patterns of memory errors. In two experiments, we explored younger and older adults' sensitivity to lures on a recognition test following study of words in these two types of contexts. Among the studied words were compound words such as "blackmail" and "jailbird" that were related to conjunction lures (e. g., "blackbird") and semantic lures (e. g., "criminal"). Participants engaged in a recognition test that included old items, conjunction lures, semantic lures, and unrelated new items. In both experiments, younger and older adults had the same general pattern of memory errors: more incorrect endorsements of semantic than conjunction lures following sentence study and more incorrect endorsements of conjunction than semantic lures following list study. The similar pattern reveals that older and younger adults responded to the constraints of the two different study contexts in similar ways. However, although younger and older adults showed similar levels of memory performance for the list study context, the sentence study context elicited superior memory performance in the older participants. It appears as though memory tasks that take advantage of greater expertise in older adults-in this case, greater experience with sentence processing-can reveal superior memory performance in the elderly.
C1 [Matzen, Laura E.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Benjamin, Aaron S.] Univ Illinois, Dept Psychol, Urbana, IL 61801 USA.
RP Matzen, LE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM lematze@sandia.gov
FU NIA NIH HHS [R01 AG026263]
NR 75
TC 5
Z9 6
U1 0
U2 12
PU AMER PSYCHOLOGICAL ASSOC
PI WASHINGTON
PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA
SN 0882-7974
J9 PSYCHOL AGING
JI Psychol. Aging
PD SEP
PY 2013
VL 28
IS 3
BP 754
EP 767
DI 10.1037/a0032945
PG 14
WC Gerontology; Psychology, Developmental
SC Geriatrics & Gerontology; Psychology
GA 217FI
UT WOS:000324342000016
PM 23834493
ER
PT J
AU Calderon, F
Haddix, M
Conant, R
Magrini-Bair, K
Paul, E
AF Calderon, Francisco
Haddix, Michelle
Conant, Richard
Magrini-Bair, Kimberly
Paul, Eldor
TI Diffuse-Reflectance Fourier-Transform Mid-Infrared Spectroscopy as a
Method of Characterizing Changes in Soil Organic Matter
SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
LA English
DT Article
ID FT-IR SPECTROSCOPY; DRIFT SPECTROSCOPY; FOREST SOILS; CARBON; FRACTIONS;
NMR; INCUBATION; DYNAMICS; DECOMPOSITION; ACIDS
AB Diffuse-reflectance Fourier-transform mid-infrared spectroscopy (MidIR) can identify the presence of important organic functional groups in soil organic matter (SOM); however, spectral interpretation needs to be validated to correctly assess changes in SOM quality and quantity. We amended soils with known standards, increasing the total C in the sample by 50%, and measured changes in MidIR spectra. Adenine, casein, cellulose, ergosterol, glucosamine, glycine, guanine, indole, methionine, palmitic acid, egg protein, chlorophyllin, tannic acid, xylose, urease, and vanillin standards were used. In addition, corn (Zea mays L.) stalk feedstock and two chars produced at different temperatures were studied. Two soils were used: a Hoytville, OH, soil (2.5% C and 36% clay) and an Akron, CO, soil (1.5% C and 14% clay). The addition of standards with >10% N content resulted in increased amide-like absorbance at 1670, 1588, and 1513 cm(-1). Bands at 2970 to 2800, 2200 to 2000, and 1030 to 1160 cm(-1) were sensitive to added polysaccharide. Protein addition increased absorption at 2970 to 2800 cm(-1) but also increased the 1691 and 1547 cm(-1) amide bands. Vanillin addition resulted in higher absorbance at the 1592, 1515, and 1295 cm(-1) aromatic C=C bands. Biochars produced at 300 degrees C resulted in increased absorbance at carbonyl and aliphatic bands, while addition of 500 degrees C biochar increased aromatic absorbance. Our results showed that MidIR is sensitive to relatively small changes in SOM. If assumptions about the soil mineralogy are met, specific spectral bands can be used to follow changes in SOM chemistry.
C1 [Calderon, Francisco] USDA ARS, Cent Great Plains Res Stn, Akron, CO 80520 USA.
[Haddix, Michelle; Conant, Richard; Paul, Eldor] Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA.
[Magrini-Bair, Kimberly] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Calderon, F (reprint author), USDA ARS, Cent Great Plains Res Stn, 40335 Cty Rd GG, Akron, CO 80520 USA.
EM francisco.calderon@ars.usda.gov
RI Conant, Richard/B-7586-2013;
OI Conant, Richard/0000-0001-7315-2476; Haddix,
Michelle/0000-0003-0984-0404
NR 38
TC 19
Z9 19
U1 8
U2 84
PU SOIL SCI SOC AMER
PI MADISON
PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA
SN 0361-5995
J9 SOIL SCI SOC AM J
JI Soil Sci. Soc. Am. J.
PD SEP-OCT
PY 2013
VL 77
IS 5
BP 1591
EP 1600
DI 10.2136/sssaj2013.04.0131
PG 10
WC Soil Science
SC Agriculture
GA 220ZO
UT WOS:000324626600013
ER
PT J
AU Gerke, BF
Wechsler, RH
Behroozi, PS
Cooper, MC
Yan, RB
Coil, AL
AF Gerke, Brian F.
Wechsler, Risa H.
Behroozi, Peter S.
Cooper, Michael C.
Yan, Renbin
Coil, Alison L.
TI IMPROVED MOCK GALAXY CATALOGS FOR THE DEEP2 GALAXY REDSHIFT SURVEY FROM
SUBHALO ABUNDANCE AND ENVIRONMENT MATCHING
SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
LA English
DT Article
DE ark matter; galaxies: evolution; galaxies: halos; galaxies:
high-redshift; large-scale structure of universe
ID HALO OCCUPATION DISTRIBUTION; DIGITAL SKY SURVEY; LUMINOSITY FUNCTION;
SATELLITE GALAXIES; THEORETICAL-MODELS; EVOLUTION; MASS; Z-SIMILAR-TO-1;
DEPENDENCE; SIMULATIONS
AB We develop empirical methods for modeling the galaxy population and populating cosmological N-body simulations with mock galaxies according to the observed properties of galaxies in survey data. We use these techniques to produce a new set of mock catalogs for the DEEP2 Galaxy Redshift Survey based on the output of the high-resolution Bolshoi simulation, as well as two other simulations with different cosmological parameters, all of which we release for public use. The mock-catalog creation technique uses subhalo abundance matching to assign galaxy luminosities to simulated dark-matter halos. It then adds color information to the resulting mock galaxies in a manner that depends on the local galaxy density, in order to reproduce the measured color-environment relation in the data. In the course of constructing the catalogs, we test various models for including scatter in the relation between halo mass and galaxy luminosity, within the abundance-matching framework. We find that there is no constant-scatter model that can simultaneously reproduce both the luminosity function and the autocorrelation function of DEEP2. This result has implications for galaxy-formation theory, and it restricts the range of contexts in which the mock catalogs can be usefully applied. Nevertheless, careful comparisons show that our new mock catalogs accurately reproduce a wide range of the other properties of the DEEP2 catalog, suggesting that they can be used to gain a detailed understanding of various selection effects in DEEP2.
C1 [Gerke, Brian F.; Wechsler, Risa H.; Behroozi, Peter S.] SLAC Natl Accelerator Lab, Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA.
[Wechsler, Risa H.; Behroozi, Peter S.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Cooper, Michael C.] Univ Calif Irvine, Ctr Galaxy Evolut, Dept Phys & Astron, Irvine, CA 92697 USA.
[Yan, Renbin] NYU, Dept Phys, Ctr Cosmol & Particle Phys, New York, NY 10003 USA.
[Coil, Alison L.] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA.
RP Gerke, BF (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Energy Efficiency Stand Grp, 1 Cyclotron Rd,M-S 90R4000, Berkeley, CA 94720 USA.
EM bgerke@slac.stanford.edu
OI Yan, Renbin/0000-0003-1025-1711
FU U.S. Department of Energy [DE-AC03-76SF00515]; Spitzer space telescope
fellowship program
FX B.F.G. and R.H.W. were supported by the U.S. Department of Energy under
contract number DE-AC03-76SF00515. M.C.C. acknowledges the support of
the Spitzer space telescope fellowship program. We thank Marc Davis,
Jeff Newman, Carlos Frenk, and especially Michael Busha for fruitful
conversations. We thank Anatoly Klypin and Joel Primack for providing
access to the Bolshoi simulation, which was run on the Pleiades machine
at NASA Ames. We thank Jeremy Tinker for providing us with his code to
compute wp(rp) in a simulation box.
NR 55
TC 10
Z9 10
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0067-0049
J9 ASTROPHYS J SUPPL S
JI Astrophys. J. Suppl. Ser.
PD SEP
PY 2013
VL 208
IS 1
AR UNSP 1
DI 10.1088/0067-0049/208/1/1
PG 25
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 214XS
UT WOS:000324172700001
ER
PT J
AU Newman, JA
Cooper, MC
Davis, M
Faber, SM
Coil, AL
Guhathakurta, P
Koo, DC
Phillips, AC
Conroy, C
Dutton, AA
Finkbeiner, DP
Gerke, BF
Rosario, DJ
Weiner, BJ
Willmer, CNA
Yan, RB
Harker, JJ
Kassin, SA
Konidaris, NP
Lai, K
Madgwick, DS
Noeske, KG
Wirth, GD
Connolly, AJ
Kaiser, N
Kirby, EN
Lemaux, BC
Lin, L
Lotz, JM
Luppino, GA
Marinoni, C
Matthews, DJ
Metevier, A
Schiavon, RP
AF Newman, Jeffrey A.
Cooper, Michael C.
Davis, Marc
Faber, S. M.
Coil, Alison L.
Guhathakurta, Puragra
Koo, David C.
Phillips, Andrew C.
Conroy, Charlie
Dutton, Aaron A.
Finkbeiner, Douglas P.
Gerke, Brian F.
Rosario, David J.
Weiner, Benjamin J.
Willmer, C. N. A.
Yan, Renbin
Harker, Justin J.
Kassin, Susan A.
Konidaris, N. P.
Lai, Kamson
Madgwick, Darren S.
Noeske, K. G.
Wirth, Gregory D.
Connolly, A. J.
Kaiser, N.
Kirby, Evan N.
Lemaux, Brian C.
Lin, Lihwai
Lotz, Jennifer M.
Luppino, G. A.
Marinoni, C.
Matthews, Daniel J.
Metevier, Anne
Schiavon, Ricardo P.
TI THE DEEP2 GALAXY REDSHIFT SURVEY: DESIGN, OBSERVATIONS, DATA REDUCTION,
AND REDSHIFTS
SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
LA English
DT Article
DE cosmology: observations; galaxies: distances and redshifts; galaxies:
evolution; galaxies: fundamental parameters; galaxies: high-redshift;
galaxies: statistics; large-scale structure of universe; methods: data
analysis; surveys
ID SIMILAR-TO 1; STAR-FORMING GALAXIES; DIGITAL SKY SURVEY; ACTIVE GALACTIC
NUCLEI; GROTH STRIP SURVEY; EXTRAGALACTIC LEGACY SURVEY;
SPITZER-SPACE-TELESCOPE; OPTICAL-ROTATION CURVES; COLOR-DENSITY
RELATION; TULLY-FISHER RELATION
AB We describe the design and data analysis of the DEEP2 Galaxy Redshift Survey, the densest and largest high-precision redshift survey of galaxies at z similar to 1 completed to date. The survey was designed to conduct a comprehensive census of massive galaxies, their properties, environments, and large-scale structure down to absolute magnitude M-B = -20 at z similar to 1 via similar to 90 nights of observation on the Keck telescope. The survey covers an area of 2.8 deg(2) divided into four separate fields observed to a limiting apparent magnitude of R-AB = 24.1. Objects with z less than or similar to 0.7 are readily identifiable using BRI photometry and rejected in three of the four DEEP2 fields, allowing galaxies with z > 0.7 to be targeted similar to 2.5 times more efficiently than in a purely magnitude-limited sample. Approximately 60% of eligible targets are chosen for spectroscopy, yielding nearly 53,000 spectra and more than 38,000 reliable redshift measurements. Most of the targets that fail to yield secure redshifts are blue objects that lie beyond z similar to 1.45, where the [O II] 3727 angstrom doublet lies in the infrared. The DEIMOS 1200 line mm(-1) grating used for the survey delivers high spectral resolution (R similar to 6000), accurate and secure redshifts, and unique internal kinematic information. Extensive ancillary data are available in the DEEP2 fields, particularly in the Extended Groth Strip, which has evolved into one of the richest multiwavelength regions on the sky. This paper is intended as a handbook for users of the DEEP2 Data Release 4, which includes all DEEP2 spectra and redshifts, as well as for the DEEP2 DEIMOS data reduction pipelines. Extensive details are provided on object selection, mask design, biases in target selection and redshift measurements, the spec2d two-dimensional data-reduction pipeline, the spec1d automated redshift pipeline, and the zspec visual redshift verification process, along with examples of instrumental signatures or other artifacts that in some cases remain after data reduction. Redshift errors and catastrophic failure rates are assessed through more than 2000 objects with duplicate observations. Sky subtraction is essentially photon-limited even under bright OH sky lines; we describe the strategies that permitted this, based on high image stability, accurate wavelength solutions, and powerful B-spline modeling methods. We also investigate the impact of targets that appear to be single objects in ground-based targeting imaging but prove to be composite in Hubble Space Telescope data; they constitute several percent of targets at z similar to 1, approaching similar to 5%-10% at z > 1.5. Summary data are given that demonstrate the superiority of DEEP2 over other deep high-precision redshift surveys at z similar to 1 in terms of redshift accuracy, sample number density, and amount of spectral information. We also provide an overview of the scientific highlights of the DEEP2 survey thus far.
C1 [Newman, Jeffrey A.; Matthews, Daniel J.] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA.
[Cooper, Michael C.] Univ Calif Irvine, Dept Phys & Astron, Ctr Galaxy Evolut, Irvine, CA 92697 USA.
[Davis, Marc; Madgwick, Darren S.] Univ Calif Berkeley, Dept Phys & Astron, Berkeley, CA 94720 USA.
[Faber, S. M.; Guhathakurta, Puragra; Koo, David C.; Phillips, Andrew C.; Conroy, Charlie; Harker, Justin J.; Lai, Kamson] Univ Calif Santa Cruz, UCO Lick Observ, Santa Cruz, CA 95064 USA.
[Coil, Alison L.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
[Conroy, Charlie; Finkbeiner, Douglas P.] Harvard Univ, Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Dutton, Aaron A.] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Gerke, Brian F.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Rosario, David J.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Weiner, Benjamin J.; Willmer, C. N. A.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
[Yan, Renbin] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
[Kassin, Susan A.] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA.
[Kassin, Susan A.; Noeske, K. G.; Lotz, Jennifer M.] CALTECH, Dept Astron, Pasadena, CA 91125 USA.
[Konidaris, N. P.; Kirby, Evan N.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Wirth, Gregory D.] Keck Observ, Kamuela, HI 96743 USA.
[Connolly, A. J.] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[Kaiser, N.; Luppino, G. A.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
[Lemaux, Brian C.] Lab Astrophys Marseille, Marseilles, France.
[Lin, Lihwai] Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan.
[Marinoni, C.] Ctr Phys Theor Marseilles, Marseilles, France.
[Metevier, Anne] Sonoma State Univ, Dept Phys & Astron, Rohnert Pk, CA 94928 USA.
[Schiavon, Ricardo P.] Liverpool John Moores Univ, Astrophys Res Inst, Wirral H41 1LD, Merseyside, England.
RP Newman, JA (reprint author), Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA.
EM janewman@pitt.edu; m.cooper@uci.edu; mdavis@berkeley.edu;
faber@ucolick.org; acoil@ucsd.edu; raja@ucolick.org; koo@ucolick.org;
phillips@ucolick.org; cconroy@cfa.harvard.edu; dutton@mpia.de;
dfinkbeiner@cfa.harvard.edu; bfgerke@lbl.gov; rosario@mpe.mpg.de;
bjw@as.arizona.edu; cnaw@as.arizona.edu; yanrenbin@gmail.com;
jharker@ucolick.org; susan.kassin@nasa.gov; npk@astro.caltech.edu;
klai@ucolick.org; noeske@stsci.edu; wirth@keck.hawaii.edu;
ajc@astro.washington.edu; kaiser@ifa.hawaii.edu; enk@astro.caltech.edu;
brian.lemaux@oamp.fr; lihwailin@asiaa.sinica.edu.tw; lotz@stsci.edu;
ger@ifa.hawaii.edu; marinoni@cpt.univ-mrs.fr; djm70@pitt.edu;
ajmetevier@gmail.com; R.P.Schiavon@ljmu.ac.uk
OI Weiner, Benjamin/0000-0001-6065-7483; Kirby, Evan/0000-0001-6196-5162
FU NSF Center for Particle Astrophysics; National Science Foundation [AST
95-29098, 00-711098, 05-07483, 08-08133, AST 00-71048, 05-07428,
08-07630, 08-06732, ARI 92-14621]; NASA [HST-AR-01947]; NASA through
Hubble Fellowship [51256.01, 51269.01, NAS 5-26555]; Space Telescope
Science Institute; CARA; Hubble Fellowships; Hubble Fellowship; Spitzer
Fellowship; W. M. Keck Foundation; University of California; NASA;
California Association for Research in Astronomy (Keck Observatory);
University of California/Lick Observatory
FX The DEEP2 survey was initiated under the auspices of the NSF Center for
Particle Astrophysics. Major grant support was provided by National
Science Foundation grants AST 95-29098, 00-711098, 05-07483, and
08-08133 to UCSC, AST 00-71048, 05-07428, and 08-07630 to UCB, and
08-06732 to the University of Pittsburgh. Computing hardware used to
analyze DEEP2 data was provided by Sun Microsystems. The HST ACS imaging
mosaic in EGS was constructed by Anton Koekemoer and Jennifer Lotz and
was funded by grant HST-AR-01947 from NASA. NASA imaging of the original
Groth Strip was planned and executed by Ed Groth and Jason Rhodes with
support from NAS5-1661 and NAG5-6279 to the WFPC1 IDT. Support for this
work was provided by NASA through Hubble Fellowship grants 51256.01 and
51269.01 awarded to E.N.K. and M.C.C., respectively, by the Space
Telescope Science Institute, which is operated by the Association of
Universities for Research in Astronomy, Inc., for NASA, under contract
NAS 5-26555. Sandra Faber thank CARA for a generous research grant and
the Miller Institute at UC Berkeley for a Visiting Miller Professorship,
during which much of this paper was written. Jeffrey Newman and Alison
Coil acknowledge support from Hubble Fellowships during their DEEP2
work, and Michael Cooper acknowledges support from both Hubble and
Spitzer Fellowships.; Thanks are due to the many institutions and
individuals who have made the DEEP2 survey possible. First thanks go to
the W. M. Keck Foundation, the University of California, and NASA for
providing funds to construct and operate the Keck telescopes. Second, we
wish to thank the technical teams in the UCO/Lick Shops and at Keck
Observatory for their role in building and commissioning the DEIMOS
spectrograph and for their superb support during many observing runs.
Funds for the spectrograph were provided by instrumentation grant ARI
92-14621 from the National Science Foundation and instrument funds from
the California Association for Research in Astronomy (Keck Observatory)
and from the University of California/Lick Observatory.
NR 156
TC 181
Z9 181
U1 2
U2 13
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0067-0049
EI 1538-4365
J9 ASTROPHYS J SUPPL S
JI Astrophys. J. Suppl. Ser.
PD SEP
PY 2013
VL 208
IS 1
AR UNSP 5
DI 10.1088/0067-0049/208/1/5
PG 57
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 214XS
UT WOS:000324172700005
ER
PT J
AU Eranki, PL
Manowitz, DH
Bals, BD
Izaurralde, RC
Kim, S
Dale, BE
AF Eranki, Pragnya L.
Manowitz, David H.
Bals, Bryan D.
Izaurralde, R. Cesar
Kim, Seungdo
Dale, Bruce E.
TI The watershed-scale optimized and rearranged landscape design (WORLD)
model and local biomass processing depots for sustainable biofuel
production: Integrated life cycle assessments
SO BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
LA English
DT Article
DE Bioethanol; sustainability; environmental assessments; cellulosic
feedstocks; LCA; biofuel supply-chain model
ID UNITED-STATES; SWITCHGRASS; ETHANOL; ENERGY; COPRODUCTION; GRASSLAND;
RUNOFF; COVER
AB An array of feedstock is being evaluated as potential raw material for cellulosic biofuel production. Thorough assessments are required in regional landscape settings before these feedstocks can be cultivated and sustainable management practices can be implemented. On the processing side, a potential solution to the logistical challenges of large biorefineries is provided by a network of distributed processing facilities called local biomass processing depots. A large-scale cellulosic ethanol industry is likely to emerge soon in the United States. We have the opportunity to influence the sustainability of this emerging industry. The watershed-scale optimized and rearranged landscape design (WORLD) model estimates land allocations for different cellulosic feedstocks at biorefinery scale without displacing current animal nutrition requirements. This model also incorporates a network of the aforementioned depots. An integrated life cycle assessment is then conducted over the unified system of optimized feedstock production, processing, and associated transport operations to evaluate net energy yields (NEYs) and environmental impacts.
A sustainability assessment was conducted in a nine-county region of Michigan for the categories of cellulosic ethanol production, soil characteristics, water quality, and greenhouse gas (GHG) emissions. Making significant changes such as introducing perennial grasses, riparian buffers and double crops in current landscapes provides the largest absolute NEYs of about 53 GJ/ha while also attaining 120% gains in soil organic carbon, 103% lower nitrogen leaching, and 68% reductions in net GHG emissions (compared to a baseline of current conventional landscapes). Interestingly, minimizing certain environmental impacts also provides greater NEYs. (c) 2013 Society of Chemical Industry and John Wiley & Sons, Ltd
C1 [Eranki, Pragnya L.; Bals, Bryan D.; Dale, Bruce E.] Michigan State Univ, Lansing, MI 48910 USA.
[Manowitz, David H.; Izaurralde, R. Cesar] Pacific NW Natl Lab, College Pk, MD USA.
[Manowitz, David H.] Univ Maryland, College Pk, MD 20742 USA.
[Izaurralde, R. Cesar] Univ Maryland, Dept Geog Sci, College Pk, MD 20742 USA.
[Kim, Seungdo] Michigan State Univ, Dept Chem Engn & Mat Sci, Lansing, MI 48910 USA.
RP Eranki, PL (reprint author), Michigan State Univ, Biomass Convers Res Lab, Dept Chem Engn & Mat Sci, 3815 Technol Blvd Suite 1045, Lansing, MI 48910 USA.
EM erankipr@msu.edu
FU DOE Great Lakes Bioenergy Research Center; US Department of Energy,
Office of Science, Office of Biological and Environmental Research
[DEFC02-07ER64494]
FX This work was funded by DOE Great Lakes Bioenergy Research Center
(www.greatlakesbioenergy.org) supported by the US Department of Energy,
Office of Science, Office of Biological and Environmental Research,
through Cooperative Agreement DEFC02-07ER64494.
NR 35
TC 10
Z9 11
U1 1
U2 60
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1932-104X
J9 BIOFUEL BIOPROD BIOR
JI Biofuels Bioprod. Biorefining
PD SEP
PY 2013
VL 7
IS 5
BP 537
EP 550
DI 10.1002/bbb.1426
PG 14
WC Biotechnology & Applied Microbiology; Energy & Fuels
SC Biotechnology & Applied Microbiology; Energy & Fuels
GA 211JZ
UT WOS:000323904400016
ER
PT J
AU Laskar, DD
Yang, B
Wang, HM
Lee, J
AF Laskar, Dhrubojyoti D.
Yang, Bin
Wang, Huamin
Lee, John
TI Pathways for biomass-derived lignin to hydrocarbon fuels
SO BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
LA English
DT Review
DE lignin; biomass; biomass pre-treatment; catalytic processing;
depolymerization; hydrocarbon; hydrodeoxygenation; hydrogenation
ID METHYL-SUBSTITUTED PHENOLS; DILUTE-ACID PRETREATMENT; NOBLE-METAL
CATALYSTS; FAST PYROLYSIS OIL; BIO-OIL; CARBOHYDRATE COMPLEXES; KRAFT
LIGNIN; REACTION NETWORK; MODEL-COMPOUND; WOOD LIGNIN
AB Production of hydrocarbon fuel from biomass-derived lignin sources with current vision of biorefinery infrastructure would significantly improve the total carbon use in biomass and make biomass conversion more economically viable. Thus, developing specialty and commodity products from biomass derived-lignin has been an important industrial and scientific endeavor for several decades. However, deconstruction of lignin's complex polymeric framework into low molecular weight reactive moieties amenable for deoxygenation and subsequent processing into hydrocarbons has proven challenging. This review offers a comprehensive outlook on the existing body of work that has been devoted to catalytic processing of lignin derivatives into hydrocarbon fuels, focusing on: (i) the intrinsic complexity and characteristic structural features of biomass-derived lignin; (ii) existing processing technologies for the isolation and depolymerization of bulk lignin (including detailed mechanistic considerations); (iii) approaches aimed at significantly improving the yields of depolymerized lignin species amenable to catalytic upgrading; and (iv) catalytic upgrading, using aqueous phase processes for transforming depolymerized lignin to hydrocarbon derivatives. Technical barriers and challenges to the valorization of lignin are highlighted throughout. The central goal of this review is to present an array of strategies that have been reported to obtain lignin, deconstruct it to reactive intermediates, and reduce its substantial oxygen content to yield hydrocarbon liquids. In this regard, reaction networks with reference to studies of lignin model compounds are exclusively surveyed. Special attention is paid to catalytic hydrodeoxygenation, hydrogenolyis, and hydrogenation. Finally, this review addresses important features of lignin that are vital to economic success of hydrocarbon production. Published in 2013 by John Wiley & Sons, Ltd
C1 [Laskar, Dhrubojyoti D.; Yang, Bin] Washington State Univ, Richland, WA 99354 USA.
[Wang, Huamin; Lee, John] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Yang, B (reprint author), Washington State Univ, Dept Biol Syst Engn, Richland, WA 99354 USA.
EM binyang@tricity.wsu.edu
OI yang, bin/0000-0003-1686-8800
FU Department of Biological Systems Engineering; Bioproducts, Sciences &
Engineering Laboratory at Washington State University; DARPA
[N66001-11-1-4141/P00001]; National Science Foundation [1258504];
National Renewable Energy Laboratory [XGB-2-22204-01]
FX We are grateful for the support from the Department of Biological
Systems Engineering and the Bioproducts, Sciences & Engineering
Laboratory at Washington State University. The material in this work was
also supported by DARPA Young Faculty Award # N66001-11-1-4141/P00001;
National Science Foundation Award # 1258504, and the National Renewable
Energy Laboratory # XGB-2-22204-01. We also appreciate the assistance of
Mr Daniel Lehrburger in writing this paper.
NR 180
TC 42
Z9 43
U1 13
U2 341
PU WILEY
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1932-104X
EI 1932-1031
J9 BIOFUEL BIOPROD BIOR
JI Biofuels Bioprod. Biorefining
PD SEP
PY 2013
VL 7
IS 5
BP 602
EP 626
DI 10.1002/bbb.1422
PG 25
WC Biotechnology & Applied Microbiology; Energy & Fuels
SC Biotechnology & Applied Microbiology; Energy & Fuels
GA 211JZ
UT WOS:000323904400020
ER
PT J
AU Duff-Brown, B
Hecker, SS
AF Duff-Brown, Beth
Hecker, Siegfried S.
TI Siegfried S. Hecker: The story of Plutonium Mountain
SO BULLETIN OF THE ATOMIC SCIENTISTS
LA English
DT Editorial Material
DE fissile material; highly enriched uranium; Kazakhstan; Los Alamos;
nuclear security; nuclear test; Nunn-Lugar Cooperative Threat Reduction
Program; plutonium; Russia; Semipalatinsk; United States
AB In this interview, former Los Alamos National Laboratory director Siegfried S. Hecker details one of the world's great nonproliferation storiesthe effort to secure the Semipalatinsk Test Site in Kazakhstan. He recounts his visit to the Russian nuclear weapons labs in early 1992, after the collapse of the Soviet Union, when he found underfunded scientists who were indifferent to the cleanup of the testing site in the now-independent Kazakhstan and doubtful that the site would pose a security threat. Hecker talks about how he was able to organize engineers and nuclear scientists in the United States, Russia, and Kazakhstan to come together in a 15-year, $150-million effort to secure many of the tunnels and test areas at the sprawling Semipalatinsk Test Site.
C1 [Hecker, Siegfried S.] Los Alamos Natl Lab, Los Alamos, NM USA.
NR 0
TC 0
Z9 0
U1 1
U2 10
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 0096-3402
J9 B ATOM SCI
JI Bull. Atom. Scient.
PD SEP
PY 2013
VL 69
IS 5
BP 1
EP 7
DI 10.1177/0096340213504891
PG 7
WC International Relations; Social Issues
SC International Relations; Social Issues
GA 209FL
UT WOS:000323739900001
ER
PT J
AU Bambha, RP
Dansson, MA
Schrader, PE
Michelsen, HA
AF Bambha, Ray P.
Dansson, Mark A.
Schrader, Paul E.
Michelsen, Hope A.
TI Effects of volatile coatings and coating removal mechanisms on the
morphology of graphitic soot
SO CARBON
LA English
DT Article
ID LASER-INDUCED INCANDESCENCE; OPTICAL-PROPERTIES; LIGHT-SCATTERING;
MOBILITY RELATIONSHIP; ELECTRON-MICROSCOPE; PARTICLE MASS;
SULFURIC-ACID; CARBON; COMBUSTION; AEROSOLS
AB We have measured morphological changes of combustion-generated mature soot with various quantities of hydrocarbon coating and different coating-removal mechanisms. We made these measurements on soot extracted from a burner and then (1) coated with oleic acid, (2) coated with oleic acid and then denuded using a thermodenuder, (3) coated with oleic acid and then heated with a laser, and (4) coated with oleic acid, denuded with a thermodenuder, and then laser heated. We compared these results to results for untreated soot from the burner. The soot samples were size selected using a differential mobility analyzer prior to coating. Uncoated, coated, and denuded particles were characterized by electric mobility size, particle and coating mass, and particle morphology. Our results show that the particles are restructured (become compact) when coated. Particles sent through the thermodenuder are irreversibly restructured. Laser desorption of coatings with thicknesses >= 20% by mass, however, returns the soot particles to a less compact morphology with some fragmentation as the coating rapidly vaporizes. A majority of laser-heated heavily coated particles stay associated with unvaporized oleic acid droplets despite some fragment ejection from the droplet. Thermally denuded particles neither return to a less compact morphology nor fragment when laser heated. (C) 2013 The Authors. Published by Elsevier Ltd. All rights reserved.
C1 [Bambha, Ray P.; Dansson, Mark A.; Schrader, Paul E.; Michelsen, Hope A.] Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA.
RP Michelsen, HA (reprint author), Sandia Natl Labs, Combust Res Facil, POB 969,MS 9055, Livermore, CA 94551 USA.
EM hamiche@sandia.gov
FU Sandia Laboratory Directed Research and Development program; Division of
Chemical Sciences, Geosciences, and Biosciences, the Office of Basic
Energy Sciences, the US Department of Energy; National Nuclear Security
Administration [DE-AC04-94-AL85000]
FX We thank Daniel Strong for the rendition of the experimental setup shown
in Fig. 1. We are very grateful to Chris Sorensen for his sage advice on
fractal analysis. We also appreciate Alexei Khalizov's insightful
comments about soot restructuring and Jeff Headrick's assistance with
the TEM image analysis. This work was funded by the Sandia Laboratory
Directed Research and Development program. The TEM analysis, the
thermodenuder design, construction, and testing, and the CPMA were
funded by the Division of Chemical Sciences, Geosciences, and
Biosciences, the Office of Basic Energy Sciences, the US Department of
Energy. Sandia is a multi-program laboratory operated by Sandia
Corporation, a Lockheed Martin Company, for the National Nuclear
Security Administration under contract DE-AC04-94-AL85000.
NR 50
TC 6
Z9 6
U1 5
U2 35
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0008-6223
EI 1873-3891
J9 CARBON
JI Carbon
PD SEP
PY 2013
VL 61
BP 80
EP 96
DI 10.1016/j.carbon.2013.04.070
PG 17
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 188QN
UT WOS:000322208700009
ER
PT J
AU Wang, Q
Yang, XQ
Qu, DY
AF Wang, Qiang
Yang, Xiao-Qing
Qu, Deyang
TI In situ ESR spectro-electrochemical investigation of the superoxide
anion radical during the electrochemical O-2 reduction reaction in
aprotic electrolyte
SO CARBON
LA English
DT Article
ID SPIN-RESONANCE; DIMETHYL-SULFOXIDE; MOLECULAR-OXYGEN; CARBON-BLACKS;
GENERATION; ELECTROREDUCTION; ACETONITRILE; ION; DIOXYGEN
AB For the first time, electrochemically generated superoxide ions on a porous carbon electrode are investigated by means of in situ electrochemical ESR technique at ambient conditions. Superoxide ions (O-2(center dot-)) are detected as the product of the electrochemical O-2 reduction reaction. The redox couple (O-2/O-2(center dot-)) is reversible in DMSO electrolyte. The superoxide ions are believed to be absorbed and de-mobilized on the carbon surface. Overlapping a symmetric carbon ESR signal, the anisotropic signal of the superoxide is observed. The g-factor of the carbon ESR spectra is found to be 2.0025, which is almost identical to that of a free electron; Anisotropic g-factors for the O-2(center dot-) are g(perpendicular to) = 2.0031, g(parallel to) = 2.0750. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Wang, Qiang; Qu, Deyang] Univ Massachusetts, Dept Chem, Boston, MA 02125 USA.
[Yang, Xiao-Qing] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
RP Qu, DY (reprint author), Univ Massachusetts, Dept Chem, 100 Morrissey Blvd, Boston, MA 02125 USA.
EM deyang.qu@umb.edu
FU Office of Vehicle Technologies of the U.S. Department of Energy
[DEAC02-98CH10886]
FX The authors are indebted to the Assistant Secretary for Energy
Efficiency and Renewable Energy, Office of Vehicle Technologies of the
U.S. Department of Energy for financial support under Contract Number
DEAC02-98CH10886.
NR 24
TC 9
Z9 9
U1 2
U2 34
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0008-6223
J9 CARBON
JI Carbon
PD SEP
PY 2013
VL 61
BP 336
EP 341
DI 10.1016/j.carbon.2013.05.013
PG 6
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 188QN
UT WOS:000322208700037
ER
PT J
AU Johns, TR
Gaudet, JR
Peterson, EJ
Miller, JT
Stach, EA
Kim, CH
Balogh, MP
Datye, AK
AF Johns, Tyne R.
Gaudet, Jason R.
Peterson, Eric J.
Miller, Jeffrey T.
Stach, Eric A.
Kim, Chang H.
Balogh, Michael P.
Datye, Abhaya K.
TI Microstructure of Bimetallic PtPd Catalysts under Oxidizing Conditions
SO CHEMCATCHEM
LA English
DT Article
DE EXAFS spectroscopy; bimetallic catalysts; palladium; platinum; structure
elucidation
ID DIESEL OXIDATION CATALYSTS; NO OXIDATION; ELECTRON-MICROSCOPY; ETHYLENE
OXIDATION; PARTICLE-SIZE; PD; METHANE; COMBUSTION; STABILITY;
DEACTIVATION
AB Diesel oxidation catalysts (DOCs), which decrease the amount of harmful carbon monoxide (CO), nitrogen oxide (NO), and hydrocarbon (HC) emissions in engine exhaust, typically utilize Pt and Pd in the active phase. There is universal agreement that the addition of Pd improves both the catalytic performance and the durability of Pt catalysts. However, the mechanisms by which Pd improves the performance of Pt are less clear. Because these catalysts operate under oxidizing conditions, it is important to understand these catalysts in their working state. Herein, we report the microstructure of PtPd catalysts that are aged in air at 750 degrees C. After 10h of aging, EXAFS and XANES analysis show that the Pt is fully reduced but that almost 30% of the Pd species are present as an oxide. HRTEM images show no evidence of surface oxides on the metallic PtPd particles. Instead, the PdO is present as a separate phase that is dispersed over the alumina support. Within the metallic particles, Pt and Pd are uniformly distributed and there is no evidence of core-shell structures. Therefore, the improved catalytic performance is likely associated with the co-existence of metallic Pt and Pd on the catalyst surface.
C1 [Johns, Tyne R.; Gaudet, Jason R.; Peterson, Eric J.; Datye, Abhaya K.] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA.
[Miller, Jeffrey T.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Stach, Eric A.] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
[Kim, Chang H.; Balogh, Michael P.] Gen Motors Global R&D, Chem & Mat Syst Lab, Warren, MI 48090 USA.
RP Datye, AK (reprint author), Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA.
EM datye@unm.edu
RI Stach, Eric/D-8545-2011; Kim, Chang/E-7752-2010; ID, MRCAT/G-7586-2011;
OI Stach, Eric/0000-0002-3366-2153; Datye, Abhaya/0000-0002-7126-8659
FU NSF [GOALI CBET-1067803, IGERT DGE-0504276, PIRE OISE-0730277, CBET
0960256]; Department of Energy; MRCAT; U.S. Department of Energy, Office
of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357];
Institute for Atom-Efficient Chemical Transformations (IACT), an Energy
Frontier Research Center; U.S. Department of Energy, Office of Basic
Energy Sciences [DE-AC02-98CH10886]
FX We acknowledge financial support from the NSF through grants GOALI
CBET-1067803, IGERT DGE-0504276, and PIRE OISE-0730277. Part of this
work was performed at beamline 10-ID-B (MRCAT) of the Advanced Photon
Source at the Argonne National Laboratory. MRCAT operations were
supported by the Department of Energy and the MRCAT member institutions.
The use of the Advanced Photon Source was supported by the U.S.
Department of Energy, Office of Science, Office of Basic Energy Sciences
under Contract No. DE-AC02-06CH11357. J.T.M. is supported as part of the
Institute for Atom-Efficient Chemical Transformations (IACT), an Energy
Frontier Research Center funded by the U.S. Department of Energy, Office
of Science, Office of Basic Energy Sciences. Part of this work was
performed on a JEOL JEM 2100F AC at General Motors Global R&D, and some
work was performed on an FEI Titan 80-300 environmental transmission
electron microscope (E-TEM) at the Center for Functional Nanomaterials
at Brookhaven National Laboratory, supported by the U.S. Department of
Energy, Office of Basic Energy Sciences, under contract No.
DE-AC02-98CH10886. We also acknowledge support from the NSF for the
acquisition of the XRD through a Major Research Instrumentation grant
(CBET 0960256). We thank Hien Pham for her assistance in obtaining the
SEM images.
NR 31
TC 15
Z9 15
U1 9
U2 100
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1867-3880
J9 CHEMCATCHEM
JI ChemCatChem
PD SEP
PY 2013
VL 5
IS 9
SI SI
BP 2636
EP 2645
DI 10.1002/cctc.201300181
PG 10
WC Chemistry, Physical
SC Chemistry
GA 206IV
UT WOS:000323514200015
ER
PT J
AU Browning, ND
Aydin, C
Lu, J
Kulkarni, A
Okamoto, NL
Ortalan, V
Reed, BW
Uzun, A
Gates, BC
AF Browning, Nigel D.
Aydin, Ceren
Lu, Jing
Kulkarni, Apoorva
Okamoto, Norihiko L.
Ortalan, Volkan
Reed, Bryan W.
Uzun, Alper
Gates, Bruce C.
TI Quantitative Z-Contrast Imaging of Supported Metal Complexes and
ClustersA Gateway to Understanding Catalysis on the Atomic Scale
SO CHEMCATCHEM
LA English
DT Article
DE cluster compounds; electron microscopy; EXAFS spectroscopy;
metal-support interactions; structure elucidation; supported catalysts
ID TRANSMISSION ELECTRON-MICROSCOPY; DARK-FIELD IMAGES; CO OXIDATION;
MULTISLICE METHOD; IRIDIUM CLUSTERS; ZEOLITE NAY; RESOLUTION; CRYSTALS;
STEM; NANOPARTICLES
AB Z-contrast imaging in an aberration-corrected scanning transmission electron microscope can be used to observe and quantify the sizes, shapes, and compositions of the metal frames in supported mono-, bi-, and multimetallic metal clusters and can even detect the metal atoms in single-metal-atom complexes, as well as providing direct structural information characterizing the metal-support interface. Herein, we assess the major experimental challenges associated with obtaining atomic resolution Z-contrast images of the materials that are highly beam-sensitive, that is, the clusters readily migrate and sinter on support surfaces, and the support itself can drastically change in structure if the experiment is not properly controlled. Calibrated and quantified Z-contrast images are used in conjunction with exsitu analytical measurements and larger-scale characterization methods such as extended X-ray absorption fine structure spectroscopy to generate an atomic-scale understanding of supported catalysts and their function. Examples of the application of these methods include the characterization of a wide range of sizes and compositions of supported clusters, primarily those incorporating Ir, Os, and Au, on highly crystalline supports (zeolites and MgO).
C1 [Browning, Nigel D.; Aydin, Ceren; Lu, Jing; Kulkarni, Apoorva; Okamoto, Norihiko L.; Ortalan, Volkan; Uzun, Alper; Gates, Bruce C.] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95618 USA.
[Browning, Nigel D.] Univ Calif Davis, Dept Mol & Cellular Biol, Davis, CA 95618 USA.
[Reed, Bryan W.] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA.
RP Browning, ND (reprint author), Pacific NW Natl Lab, Fundamental & Computat Sci Directorate, 902 Battelle Blvd, Richland, WA 99352 USA.
EM nigel.browning@pnnl.gov
RI Okamoto, Norihiko/A-7345-2010;
OI Browning, Nigel/0000-0003-0491-251X; Okamoto,
Norihiko/0000-0003-0199-7271; Uzun, Alper/0000-0001-7024-2900
FU US Department of Energy (DOE) [DE-FG02-03ER46057, DE-FG02-04ER15513,
DE-SC0005822]; University of California Lab Fee Program; Oak Ridge
National Laboratory SHaRE User Facility; Division of Scientific User
Facilities, DOE Office of Science, Basic Energy Sciences
FX The work presented herein was supported by the US Department of Energy
(DOE, Grants DE-FG02-03ER46057, DE-FG02-04ER15513 (C.A) and DE-SC0005822
(J.L.)) and the University of California Lab Fee Program. We acknowledge
time and the support of the Oak Ridge National Laboratory SHaRE User
Facility, which is supported by the Division of Scientific User
Facilities, DOE Office of Science, Basic Energy Sciences.
NR 60
TC 2
Z9 2
U1 5
U2 70
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1867-3880
J9 CHEMCATCHEM
JI ChemCatChem
PD SEP
PY 2013
VL 5
IS 9
SI SI
BP 2673
EP 2683
DI 10.1002/cctc.201200872
PG 11
WC Chemistry, Physical
SC Chemistry
GA 206IV
UT WOS:000323514200020
ER
PT J
AU Johnson, GE
Priest, T
Laskin, J
AF Johnson, Grant E.
Priest, Thomas
Laskin, Julia
TI Synthesis and Characterization of Gold Clusters Ligated with
1,3-Bis(dicyclohexylphosphino)propane
SO CHEMPLUSCHEM
LA English
DT Article
DE cluster compounds; gold; mass spectrometry; phosphine ligands;
substituent effects
ID SIMPLE METAL-CLUSTERS; NANOCLUSTER FORMATION; NANOPARTICLES;
MONODISPERSE; UNDECAGOLD; REACTIVITY; COMPLEXES; PHYSICS; CO
AB In this multidisciplinary study the chemical reduction synthesis of novel gold clusters in solution was combined with high-resolution analytical mass spectrometry (MS) to gain insight into the composition of the gold clusters and how their size, ionic charge state, and ligand substitution influences their gas-phase fragmentation pathways. Ultrasmall cationic gold clusters ligated with 1,3-bis(dicyclohexylphosphino)propane (dcpp) were synthesized for the first time and introduced into the gas phase using electrospray ionization (ESI). Mass-selected cluster ions were fragmented by employing collision-induced dissociation (CID) and the product ions were analyzed using MS. The solutions were found to contain the multiply charged cationic gold clusters Au9L43+, Au13L53+, Au6L32+, Au8L32+, and Au10L42+ (L=dcpp). The gas-phase fragmentation pathways of these cluster ions were examined systematically by employing CID combined with MS. In addition, CID experiments were performed on related gold clusters of the same size and ionic charge state but capped with 1,3-bis(diphenylphosphino)propane (dppp) ligands containing phenyl functional groups at the two phosphine centers instead of cyclohexane rings. It is shown that this relatively small change in the molecular substitution of the two phosphine centers in diphosphine ligands (C6H11 versus C6H5) exerts a pronounced influence on the size of the species that are preferentially formed in solution during reduction synthesis as well as the gas-phase fragmentation channels of otherwise identical gold cluster ions. The mass spectrometry results indicate that in addition to the length of the alkyl chain between the two phosphine centers, the substituents at the phosphine centers also play a crucial role in determining the composition, size, and stability of diphosphine-ligated gold clusters synthesized in solution.
C1 [Johnson, Grant E.; Priest, Thomas; Laskin, Julia] Pacific NW Natl Lab, Div Phys Sci, Richland, WA 99352 USA.
RP Johnson, GE (reprint author), Pacific NW Natl Lab, Div Phys Sci, POB 999,MSIN K8-88, Richland, WA 99352 USA.
EM Grant.Johnson@pnnl.gov
RI Laskin, Julia/H-9974-2012;
OI Laskin, Julia/0000-0002-4533-9644; Johnson, Grant/0000-0003-3352-4444
FU Linus Pauling Postdoctoral Fellowship Program; Laboratory Directed
Research and Development Program at the Pacific Northwest National
Laboratory (PNNL); U.S. Department of Energy (DOE), Office of Basic
Energy Sciences, and Division of Chemical Sciences, Geosciences, and
Biosciences; DOE's Science Undergraduate Laboratory Internship (SULI) at
PNNL; U.S. DOE of Biological and Environmental Research and located at
PNNL
FX G.E.J. acknowledges the support of the Linus Pauling Postdoctoral
Fellowship Program and the Laboratory Directed Research and Development
Program at the Pacific Northwest National Laboratory (PNNL). J.L. and
T.P. acknowledge support from the U.S. Department of Energy (DOE),
Office of Basic Energy Sciences, and Division of Chemical Sciences,
Geosciences, and Biosciences. T.P. was supported in part by the DOE's
Science Undergraduate Laboratory Internship (SULI) at PNNL. The research
was performed using EMSL, a national scientific user facility sponsored
by the U.S. DOE of Biological and Environmental Research and located at
PNNL. PNNL is operated by Battelle for the U.S. DOE.
NR 43
TC 5
Z9 5
U1 3
U2 40
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 2192-6506
J9 CHEMPLUSCHEM
JI ChemPlusChem
PD SEP
PY 2013
VL 78
IS 9
SI SI
BP 1033
EP 1039
DI 10.1002/cplu.201300134
PG 7
WC Chemistry, Multidisciplinary
SC Chemistry
GA 213GL
UT WOS:000324043400022
ER
PT J
AU Williams, DN
Bremer, T
Doutriaux, C
Patchett, J
Williams, S
Shipman, G
Miller, R
Pugmire, DR
Smith, B
Steed, C
Bethel, EW
Childs, H
Krishnan, H
Prabhat
Wehner, M
Silva, CT
Santos, E
Hoop, D
Ellqvist, T
Poco, J
Geveci, B
Chaudhary, A
Bauer, A
Pletzer, A
Kindig, D
Potter, GL
Maxwell, TP
AF Williams, Dean N.
Bremer, Timo
Doutriaux, Charles
Patchett, John
Williams, Sean
Shipman, Galen
Miller, Ross
Pugmire, David R.
Smith, Brian
Steed, Chad
Bethel, E. Wes
Childs, Hank
Krishnan, Harinarayan
Prabhat
Wehner, Michael
Silva, Claudio T.
Santos, Emanuele
Hoop, David
Ellqvist, Tommy
Poco, Jorge
Geveci, Berk
Chaudhary, Aashish
Bauer, Andy
Pletzer, Alexander
Kindig, Dave
Potter, Gerald L.
Maxwell, Thomas P.
CA Ultrascale Visualization Climate
TI Ultrascale Visualization of Climate Data
SO COMPUTER
LA English
DT Article
AB Collaboration across research, government, academic, and private sectors is integrating more than 70 scientific computing libraries and applications through a tailorable provenance framework, empowering scientists to exchange and examine data in novel ways.
C1 [Williams, Dean N.; Bremer, Timo; Doutriaux, Charles] Lawrence Livermore Natl Lab, Livermore, CA USA.
[Patchett, John; Williams, Sean] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Shipman, Galen; Miller, Ross; Pugmire, David R.; Smith, Brian; Steed, Chad] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Bethel, E. Wes; Childs, Hank; Krishnan, Harinarayan; Prabhat; Wehner, Michael] Lawrence Berkeley Natl Lab, Berkeley, CA USA.
[Silva, Claudio T.; Santos, Emanuele; Hoop, David; Ellqvist, Tommy; Poco, Jorge] NYU, Polytech Inst, New York, NY 10003 USA.
[Potter, Gerald L.; Maxwell, Thomas P.] NASA, Goddard Space Flight Ctr, Washington, DC USA.
RP Williams, DN (reprint author), Lawrence Livermore Natl Lab, Livermore, CA USA.
EM williams13@llnl.gov; bremer5@llnl.gov; doutriaux1@llnl.gov;
patchett@lanl.gov; seanw@lanl.gov; gshipman@ornl.gov; rgmiller@ornl.gov;
pugmire@ornl.gov; smithbe@ornl.gov; steedca@ornl.gov; ewbethel@lbl.gov;
hchilds@lbl.gov; hkrishnan@lbl.gov; prabhat@lbl.gov; MFWehner@lbl.gov;
csilva@nyu.edu; emanuele@lia.ufc.br; dkoop@poly.edu;
tommy.ellqvist@yahoo.se; jpocom@nyu.edu; berk.geveci@kitware.com;
aashish.chaudhary@kitware.com; andy.bauer@kitware.com;
pletzer@txcorp.com; kindig@txcorp.com; gerald.potter@nasa.gov;
thomas.maxwell@nasa.gov
OI Steed, Chad/0000-0002-3501-909X; Poco, Jorge/0000-0001-9096-6287
FU Office of Science, Office of Biological and Environmental Research, of
the US Department of Energy [DE-AC02-05CH11231, DE-AC52-07NA27344];
National Aeronautics and Space Administration; DOE Office of Science
[DE-AC05-00OR22725]
FX This work is supported by the Director, Office of Science, Office of
Biological and Environmental Research, of the US Department of Energy,
under contracts DE-AC02-05CH11231 and DE-AC52-07NA27344 and by the
National Aeronautics and Space Administration. This research used
resources of the Oak Ridge Leadership Computing Facility at Oak Ridge
National Laboratory, which is supported by the DOE Office of Science
under Contract No. DE-AC05-00OR22725.
NR 6
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U1 0
U2 27
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA
SN 0018-9162
J9 COMPUTER
JI Computer
PD SEP
PY 2013
VL 46
IS 9
BP 68
EP 76
PG 9
WC Computer Science, Hardware & Architecture; Computer Science, Software
Engineering
SC Computer Science
GA 218UG
UT WOS:000324457400020
ER
PT J
AU Harrison, E
Love, CN
Jones, KL
Lance, SL
Trexler, JC
Collins, T
AF Harrison, Elizabeth
Love, Cara N.
Jones, Kenneth L.
Lance, Stacey L.
Trexler, Joel C.
Collins, Timothy
TI Isolation and characterization of 18 novel polymorphic microsatellite
markers from the Mayan cichlid (Cichlasoma urophthalmus)
SO CONSERVATION GENETICS RESOURCES
LA English
DT Article
DE Cichlasoma; Illumina; Microsatellite; PAL_FINDER; PCR primers; SSR
ID FLORIDA
AB We isolated and characterized 18 microsatellite loci from the Mayan cichlid, Cichlasoma urophthalmus. Loci were screened for 24 specimens from a total of seven sites in south Florida, Mexico, Belize and Honduras. The number of alleles per locus ranged from 3 to 21, observed heterozygosity ranged from 0.208 to 0.875, and the probability of identity values ranged from 0.012 to 0.203. These new loci will provide tools for identifying the source population(s) for the introduction of Mayan cichlids in south Florida and for comparing population genetic structure of Mayan cichlids within and among subpopulations in its native (Central America) and introduced ranges (south Florida). Mayan cichlids are an invasive species in south Florida so identifying source populations may reveal pathways that can be managed to prevent further introductions. Mayan cichlids may also be useful as a model system in which to examine the relationship between introduction history, population genetic diversity, and invasibility.
C1 [Harrison, Elizabeth; Trexler, Joel C.; Collins, Timothy] Florida Int Univ, Dept Biol Sci, North Miami, FL 33181 USA.
[Love, Cara N.; Lance, Stacey L.] Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA.
[Jones, Kenneth L.] Univ Colorado, Sch Med, Dept Biochem & Mol Genet, Aurora, CO 80045 USA.
RP Harrison, E (reprint author), Florida Int Univ, Dept Biol Sci, 3000 NE 151 St, North Miami, FL 33181 USA.
EM eharr001@fiu.edu
RI Lance, Stacey/K-9203-2013
OI Lance, Stacey/0000-0003-2686-1733
FU Sigma Xi; Florida International University Latin American and Caribbean
Center; DOE [DE-FC09-07SR22506]
FX We thank Joel Loera, Ella Vasquez, Ulises Razo Mendivil, Luis Zambrano,
Xavier Chiapas, Wilfredo Matamoros and Christian Barrientos for their
help in collecting and organizing samples. We also thank Paul Sharp for
his help in laboratory techniques. This research was funded by Sigma Xi
and the Florida International University Latin American and Caribbean
Center. Manuscript preparation was partially supported by the DOE under
Award Number DE-FC09-07SR22506 to the University of Georgia Research
Foundation.
NR 12
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Z9 2
U1 0
U2 12
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1877-7252
EI 1877-7260
J9 CONSERV GENET RESOUR
JI Conserv. Genet. Resour.
PD SEP
PY 2013
VL 5
IS 3
BP 703
EP 705
DI 10.1007/s12686-013-9886-8
PG 3
WC Biodiversity Conservation; Genetics & Heredity
SC Biodiversity & Conservation; Genetics & Heredity
GA 194GT
UT WOS:000322619900025
ER
PT J
AU Carson, EW
Beasley, RR
Jones, KL
Lance, SL
Lozano-Vilano, MD
Vela-Valladares, L
Banda-Villanueva, I
Turner, TF
De la Maza-Benignos, M
AF Carson, Evan W.
Beasley, Rochelle R.
Jones, Kenneth L.
Lance, Stacey L.
de Lourdes Lozano-Vilano, Ma
Vela-Valladares, Lilia
Banda-Villanueva, Iris
Turner, Thomas F.
De la Maza-Benignos, Mauricio
TI Development of polymorphic microsatellite markers for the microendemic
pupfishes Cyprinodon julimes and C-pachycephalus
SO CONSERVATION GENETICS RESOURCES
LA English
DT Article
DE Cyprinodon; Illumina; Microsatellite; PAL_FINDER; PCR primers; SSR
AB We developed microsatellite loci for the Julimes pupfish, Cyprinodon julimes. Twenty-five loci were screened across 19 individuals from Julimes Spring, Chihuahua, Mexico. The number of alleles per locus ranged from 2 to 14, observed heterozygosity ranged from 0.105 to 0.947, and the probability of identity values ranged from 0.022 to 0.588. We then tested for cross-amplification in the bighead pupfish, C. pachycephalus; twenty-three individuals from San Diego de Alcala, Chihuahua, Mexico, were screened across the 20 loci that amplified cleanly. These new loci will be used for long-term genetic monitoring of these critically endangered species.
C1 [Carson, Evan W.; Turner, Thomas F.] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA.
[Carson, Evan W.; Turner, Thomas F.] Univ New Mexico, Museum Southwestern Biol, Albuquerque, NM 87131 USA.
[Beasley, Rochelle R.; Lance, Stacey L.] Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA.
[Jones, Kenneth L.] Univ Colorado, Sch Med, Dept Biochem & Mol Genet, Aurora, CO 80045 USA.
[de Lourdes Lozano-Vilano, Ma] Univ Autonoma Nuevo Leon, Lab Ictiol, Fac Ciencias Biol, San Nicolas De Los Garza 66450, NL, Mexico.
[Vela-Valladares, Lilia; Banda-Villanueva, Iris; De la Maza-Benignos, Mauricio] Pronatura Noreste AC, Monterrey 64710, NL, Mexico.
RP Carson, EW (reprint author), Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA.
EM evan.carson@gmail.com
RI Lance, Stacey/K-9203-2013; Beasley, Rochelle/M-1396-2015
OI Lance, Stacey/0000-0003-2686-1733; Beasley, Rochelle/0000-0001-7325-4085
FU Secretary of Environment and Natural Resources of Mexico (SEMARNAT)
[08D01-00025/1201]; DOE [DE-FC09-07SR22506]; TFT; Pronatura Noreste
FX The authors acknowledge the grant support provided by the Secretary of
Environment and Natural Resources of Mexico (SEMARNAT), through "Fomento
a la Conservacion y al Aprovechamiento Sustentable de la Vida Silvestre"
under award number 08D01-00025/1201 to Amigos del Pandeno, A. C.
Manuscript preparation was partially supported by the DOE under Award
Number DE-FC09-07SR22506 to the University of Georgia Research
Foundation. Funding was provided by TFT and a grant to EWC by Pronatura
Noreste, A. C. Samples were collected under permit numbers
SGPA-DGVS-02015-11 and SGPA-DGVS-02833-12 issued to MLLV and vouchered
at Coleccion Ictiologica de la Facultad de Ciencias Biologicas de la
UANL, under voucher numbers UANL 19666, UANL 19669, and UANL 20830 (C.
julimes), and UANL 19667, UANL 19668, and UANL 20840 (C. pachycephalus).
NR 10
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U1 0
U2 10
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1877-7252
J9 CONSERV GENET RESOUR
JI Conserv. Genet. Resour.
PD SEP
PY 2013
VL 5
IS 3
BP 853
EP 856
DI 10.1007/s12686-013-9925-5
PG 4
WC Biodiversity Conservation; Genetics & Heredity
SC Biodiversity & Conservation; Genetics & Heredity
GA 194GT
UT WOS:000322619900060
ER
PT J
AU Manley, DK
Hines, VA
Jordan, MW
Stoltz, RE
AF Manley, Dawn K.
Hines, Valerie A.
Jordan, Matthew W.
Stoltz, Ronald E.
TI A survey of energy policy priorities in the United States: Energy supply
security, economics, and the environment
SO ENERGY POLICY
LA English
DT Article
DE Energy policy goals; Opinion poll; Multi-criteria decision analysis
ID MULTICRITERIA DECISION-MAKING; AID APPROACH; ATTITUDES; DESIGN; TRENDS;
POWER
AB Security, environment, and economic concerns are commonly identified as three major objectives of energy policy. State and federal governments have set aggressive targets for carbon emissions reductions and for alternative fuel use and increased vehicle efficiency to reduce petroleum consumption. Moreover, jobs creation and GDP growth are often cited as key drivers for energy policies. Previous studies on energy policy decision-making have examined the process for developing and evaluating options using multi-criteria decision analysis tools. In addition, energy opinion polls have either elicited preferences between two goals or whether the public supports a specific policy action. In this article, we report results from a survey of 884 members of professional membership organizations on how the U.S. should prioritize energy policy across the goals of energy supply security, environment and climate, and economics and job creation. The majority favor policymaking that is balanced across all three. Security and economic concerns increase with age for male respondents, whereas environment is the highest priority for females regardless of age. Unlike previous surveys that target the general public and focus on a particular objective or technology, these results provide an example of eliciting a portfolio allocation across multiple energy policy goals from targeted constituents. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Manley, Dawn K.; Hines, Valerie A.] Sandia Natl Labs, Livermore, CA 94551 USA.
RP Manley, DK (reprint author), Sandia Natl Labs, POB 969, Livermore, CA 94551 USA.
EM dmanley@sandia.gov
FU U.S. Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]
FX The authors thank Dr. Laura McNamara and the anonymous reviewers for
their thoughtful review and helpful comments. Sandia National
Laboratories is a multi-program laboratory managed and operated by
Sandia Corporation, a wholly owned subsidiary of Lockheed Martin
Corporation, for the U.S. Department of Energy's National Nuclear
Security Administration under Contract DE-AC04-94AL85000.
NR 42
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U1 2
U2 37
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0301-4215
EI 1873-6777
J9 ENERG POLICY
JI Energy Policy
PD SEP
PY 2013
VL 60
BP 687
EP 696
DI 10.1016/j.enpol.2013.04.061
PG 10
WC Energy & Fuels; Environmental Sciences; Environmental Studies
SC Energy & Fuels; Environmental Sciences & Ecology
GA 206OB
UT WOS:000323530900069
ER
PT J
AU Dooley, JJ
AF Dooley, James J.
TI Human choice and CCS deployment: What have we learned from the social
sciences about CCS?
SO INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
LA English
DT Editorial Material
C1 Pacific NW Natl Lab, Joint Global Change Res Inst, College Pk, MD USA.
RP Dooley, JJ (reprint author), Pacific NW Natl Lab, Joint Global Change Res Inst, College Pk, MD USA.
EM jj.dooley@pnnl.gov
NR 4
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U1 0
U2 4
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1750-5836
J9 INT J GREENH GAS CON
JI Int. J. Greenh. Gas Control
PD SEP
PY 2013
VL 17
BP V
EP VI
DI 10.1016/j.ijggc.2013.05.028
PG 2
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels; Engineering,
Environmental
SC Science & Technology - Other Topics; Energy & Fuels; Engineering
GA 214RO
UT WOS:000324153700001
ER
PT J
AU Sakaki, T
Plampin, MR
Pawar, R
Komatsu, M
Illangasekare, TH
AF Sakaki, Toshihiro
Plampin, Michael R.
Pawar, Rajesh
Komatsu, Mitsuru
Illangasekare, Tissa H.
TI What controls carbon dioxide gas phase evolution in the subsurface?
Experimental observations in a 4.5 m-long column under different
heterogeneity conditions
SO INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
LA English
DT Article
DE Exsolution; Heterogeneity; Long-column experiments; Critical gas
saturation; Dielectric constant; Electrical conductivity
ID POROUS-MEDIUM; BUBBLE-GROWTH; SOLUTE DIFFUSION; DISPOSAL; SATURATION;
AQUIFERS; SENSORS; CO2
AB In order to assess the risk of CO2 leakage affecting the groundwater quality in aquifers, it is important to understand the mechanisms of CO2 gas release when brine carrying dissolved CO2 migrates to the shallow subsurface from sequestrated zones of deep geologic formations. As the brine with dissolved CO2 elevates where the water pressure is lower, development of a gas phase starts with evolution of gas out of liquid, followed by gas phase growth and movement. However, conditions under which CO2 gas evolution is triggered, how the gaseous phase CO2 migrates and/or gets entrapped in the naturally heterogeneous formations are not well understood due to the difficulties involved with obtaining detailed experimental data. In this study, our goal was to identify the conditions under which dissolved CO2 forms a gas phase and to understand how the formed CO2 gas migrates through the saturated soil formation. In particular, we put emphasis on the critical gas saturation (at which the onset of gas phase migration occurs) and how this is explained by the theoretical and modeling studies reported in the literature. We have performed a series of experiments in the laboratory using a highly instrumented long column under highly controlled conditions that are not feasible in field settings. The 4.5 m-long vertical column setup was instrumented with automated sensors to continuously monitor phase saturation, electrical conductivity (EC), temperature, and water pressure distribution along the column length as well as the rates of water and gas outflow at the upstream end of the column. The observations showed that (1) concentration of dissolved CO2 influenced the vertical extent of the gas phase formation, (2) the gas formation pattern was different if the saturation pressure was lower or higher than the static water pressure at the injection port which results largely from the gravity and viscous forces somewhat competing under the conditions in the experiments, (3) the mass transfer-dominant period where bubbles grew and water outflow increased was relatively short, (4) gas outflow was detected at the column outlet only after a continuous gas phase was formed and breakthrough had occurred, (5) the critical gas phase saturation at which the generated gas phase gets mobilized was always about 0.3-0.4 in homogeneous cases, (6) for the heterogeneous cases, a gas saturation higher than the critical gas saturation was observed due to accumulation of gas phase under a finer layer, (7) the injection rate did not affect the gas formation behavior whereas the temperature variation did, and (8) in some cases formation of gas appeared to be triggered by heterogeneities. These observations are expected to improve our understanding of gas evolution for better conceptualization and model development. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Sakaki, Toshihiro; Plampin, Michael R.; Illangasekare, Tissa H.] Colorado Sch Mines, Ctr Expt Study Subsurface Environm Proc CESEP, Golden, CO 80401 USA.
[Pawar, Rajesh] Los Alamos Natl Lab, Earth & Environm Sci Div, Los Alamos, NM 87545 USA.
[Komatsu, Mitsuru] Okayama Univ, Grad Sch Environm & Life Sci, Okayama 7008530, Japan.
RP Sakaki, T (reprint author), Natl Cooperat Disposal Radioact Waste NAGRA, Int Serv & Projects Div, Hard Str 73, CH-5430 Wettingen, Switzerland.
EM toshihiro.sakaki@nagra.ch; mplampin@mymail.mines.edu; rajesh@lanl.gov;
mkomatsu@okayama-u.ac.jp; tissa@mines.edu
RI Plampin, Michael/K-9110-2016
OI Plampin, Michael/0000-0003-4068-5801
FU US Department of Energy's Office of Fossil Energy through National
Energy Technology Laboratory's CO2 Sequestration RD Program
FX This research was funded by the US Department of Energy's Office of
Fossil Energy through National Energy Technology Laboratory's
CO2 Sequestration R&D Program.
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PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1750-5836
J9 INT J GREENH GAS CON
JI Int. J. Greenh. Gas Control
PD SEP
PY 2013
VL 17
BP 66
EP 77
DI 10.1016/j.ijggc.2013.03.025
PG 12
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels; Engineering,
Environmental
SC Science & Technology - Other Topics; Energy & Fuels; Engineering
GA 214RO
UT WOS:000324153700007
ER
PT J
AU Martinez, MJ
Newell, P
Bishop, JE
Turner, DZ
AF Martinez, M. J.
Newell, P.
Bishop, J. E.
Turner, D. Z.
TI Coupled multiphase flow and geomechanics model for analysis of joint
reactivation during CO2 sequestration operations
SO INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
LA English
DT Article
DE Geomechanics; Multiphase flow; Coupled flow and geomechanics; Jointed
rock; CO2 sequestration
ID DEEP SALINE AQUIFERS; CARBON-DIOXIDE; FLUID-FLOW; NORMAL STIFFNESS;
STORAGE; ROCK; FRACTURE; PRESSURES; INJECTION; MEDIA
AB The initial and primary trapping mechanism for long term subsurface sequestration of CO2 is structural trapping beneath a low permeability caprock layer. Maintaining caprock integrity during injection operations is paramount to successful sequestration. Evaluation of jointed/fractured caprock systems is of particular concern to CO2 sequestration because creation of fractures or reactivation of joints can lead to enhanced pathways for leakage.
In this work, a joint model is introduced to describe joint reactivation during injection of CO2. The model assumes equally spaced anisotropic joint sets with non-linear normal stiffness and linear shear stiffness. Normal displacement of the joints is mapped into a dynamically evolving effective anisotropic permeability tensor, assuming a cubic law for fracture permeability as a function of joint aperture. A model problem is presented to demonstrate features of the joint model and how it affects the coupled geomechanics and flow during injection of CO2 into deep saline aquifers. The model is used to demonstrate injection reservoir properties and injection rates that have potential for inducing leakage through the caprock due to overpressures associated with CO2 injection.
In situations where pore pressure approaches or exceeds lithostatic pressure under a constant-rate, 30 year injection, the model indicates between 16 and 20% of injected CO2 could leak past the primary caprock after 50 years. The model also indicates a concomitant overpressure reduction that could signal caprock leakage during the injection. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Martinez, M. J.; Newell, P.; Bishop, J. E.] Sandia Natl Labs, Engn Sci Ctr, Albuquerque, NM 87185 USA.
[Turner, D. Z.] Univ Stellenbosch, Dept Civil Engn, ZA-7600 Stellenbosch, South Africa.
RP Martinez, MJ (reprint author), Sandia Natl Labs, Engn Sci Ctr, POB 5800, Albuquerque, NM 87185 USA.
EM mjmarti@sandia.gov
FU Center for Frontiers of Subsurface Energy Security, an Energy Frontier
Research Center; U.S. Department of Energy, Office of Science, Office of
Basic Energy Sciences [DE-SC0001114]; United States Department of
Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
FX This material is based upon work supported as part of the Center for
Frontiers of Subsurface Energy Security, an Energy Frontier Research
Center funded by the U.S. Department of Energy, Office of Science,
Office of Basic Energy Sciences under Award Number DE-SC0001114. Sandia
is a multi-program laboratory operated by Sandia Corporation, a Lockheed
Martin Company, for the United States Department of Energy's National
Nuclear Security Administration under Contract DE-AC04-94AL85000.
NR 65
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PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1750-5836
EI 1878-0148
J9 INT J GREENH GAS CON
JI Int. J. Greenh. Gas Control
PD SEP
PY 2013
VL 17
BP 148
EP 160
DI 10.1016/j.ijggc.2013.05.008
PG 13
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels; Engineering,
Environmental
SC Science & Technology - Other Topics; Energy & Fuels; Engineering
GA 214RO
UT WOS:000324153700015
ER
PT J
AU Wainwright, HM
Finsterle, S
Zhou, QL
Birkholzer, JT
AF Wainwright, Haruko M.
Finsterle, Stefan
Zhou, Quanlin
Birkholzer, Jens T.
TI Modeling the performance of large-scale CO2 storage systems: A
comparison of different sensitivity analysis methods
SO INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
LA English
DT Article
DE CO2 storage; Basin-scale reservoir model; CO2 saturation; Pressure
buildup; CO2 plume extent; Sensitivity analysis
ID DEEP SALINE AQUIFERS; NATURAL ANALOG SITE; GEOLOGIC STORAGE; PRESSURE
BUILDUP; CARBON-DIOXIDE; SEQUESTRATION; LEAKAGE; SIMULATION; INJECTION;
IMPACT
AB In this study, we perform sensitivity analyses using a high-resolution basin-scale reservoir model developed for a hypothetical carbon sequestration project located in the Southern San Joaquin Basin in California, USA. We use the massively parallel version of the multiphase multicomponent simulator TOUGH2 to simulate CO2/brine migration and pressure buildup within the CO2 storage formation and overlying/underlying formations. We evaluate the impact of parameter uncertainty on risk-related performance measures, i.e., CO2 saturation and pressure buildup at multiple locations, and the extent of the CO2 plume and overpressure zone. We compare three sensitivity analysis methods: a local sensitivity method and the global Morris and Sobol'/Saltelli methods. The uncertainty of sensitivity indices in the global methods is evaluated so that we can interpret the results even when we have a limitation in the computational resources. Results show that the three methods provide complementary information for identifying important parameters and system understanding. All three methods give consistent interpretations and importance rankings, except when a parameter has a significant non-linear effect and/or strong interaction with some other parameters. In addition to the magnitude of parameter sensitivity, our analysis emphasizes the direction (i.e., favorable or adverse in the risk perspective), non-linearity and/or interaction effects, and physical interpretation of each parameter sensitivity trend. Parameter importance varies with time and space, and also depends on the CO2 plume or pressure behaviors. In this study, the reservoir permeability is among the most important parameters for all measures, although it has a large trade-off effect in risk such that a higher permeability would tend to reduce reservoir pressure but, at the same time, increase the size of the CO2 plume footprint. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Wainwright, Haruko M.; Finsterle, Stefan; Zhou, Quanlin; Birkholzer, Jens T.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Wainwright, HM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
EM hmwainwright@lbl.gov
RI Zhou, Quanlin/B-2455-2009; Finsterle, Stefan/A-8360-2009; Wainwright,
Haruko/A-5670-2015; Birkholzer, Jens/C-6783-2011
OI Zhou, Quanlin/0000-0001-6780-7536; Finsterle,
Stefan/0000-0002-4446-9906; Wainwright, Haruko/0000-0002-2140-6072;
Birkholzer, Jens/0000-0002-7989-1912
FU DOE Office of Fossil Energy's Cross Cutting Research program; U.S.
Department of Energy [DE-AC02-05CH11231]
FX This work was completed as part of National Risk Assessment Partnership
(NRAP) project. Support for this project came from the DOE Office of
Fossil Energy's Cross Cutting Research program. Funding was provided to
Lawrence Berkeley National Laboratory under U.S. Department of Energy
Contract No. DE-AC02-05CH11231. The authors wish to thank Jeff Wagoner
of Lawrence Livermore National Laboratory for developing the geologic
framework model of the Southern San Joaquin Basin and Yingqi Zhang of
Lawrence Berkeley National Laboratory for technical review. Helpful
suggestions and comments by George Guthrie of National Energy Technology
Laboratory are greatly appreciated. We also thank two anonymous
reviewers for their helpful comments.
NR 44
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PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1750-5836
J9 INT J GREENH GAS CON
JI Int. J. Greenh. Gas Control
PD SEP
PY 2013
VL 17
BP 189
EP 205
DI 10.1016/j.ijggc.2013.05.007
PG 17
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels; Engineering,
Environmental
SC Science & Technology - Other Topics; Energy & Fuels; Engineering
GA 214RO
UT WOS:000324153700019
ER
PT J
AU Suh, DM
Sun, X
AF Suh, Dong-Myung
Sun, Xin
TI Particle-scale CO2 adsorption kinetics modeling considering three
reaction mechanisms
SO INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
LA English
DT Article
DE CO2 capture; Reaction kinetics; Sorbent particle; Simulation; Adsorption
ID CARBON-DIOXIDE CAPTURE; FIRED POWER-PLANTS; FLUIDIZED-BED; SOLID
SORBENTS; MONOETHANOLAMINE; CONFIGURATIONS; TECHNOLOGY
AB In the presence of water (H2O), dry and wet adsorptions of carbon dioxide (CO2) and physical adsorption of H2O happen concurrently in a sorbent particle. The three reactions depend on each other and have a complicated, but important, effect on CO2 capturing via a solid sorbent. In this study, transport phenomena in the sorbent were modeled, including the three reactions, and a numerical solving procedure for the model also was explained. The reaction variable distribution in the sorbent and their average values were calculated, and simulation results were compared with experimental data to validate the proposed model. Some differences, caused by thermodynamic parameters, were observed between them. However, the developed model reasonably simulated the adsorption behaviors of a sorbent.
The weight gained by each adsorbed species, CO2 and H2O, is difficult to determine experimentally. It is known that more CO2 can be captured in the presence of water. Still, it is not yet known quantitatively how much more CO2 the sorbent can capture, nor is it known how much dry and wet adsorptions separately account for CO2 capture. This study addresses those questions by modeling CO2 adsorption in a particle and simulating the adsorption process using the model. As adsorption temperature changed into several values, the adsorbed amount of each species was calculated. The captured CO2 in the sorbent particle was compared quantitatively between dry and wet conditions. As the adsorption temperature decreased, wet adsorption increased. However, dry adsorption was reduced. Published by Elsevier B.V.
C1 [Suh, Dong-Myung; Sun, Xin] Pacific NW Natl Lab, Computat Sci & Math Div, Richland, WA 99352 USA.
RP Suh, DM (reprint author), Pacific NW Natl Lab, Computat Sci & Math Div, Richland, WA 99352 USA.
EM dongmyung.suh@gmail.com
NR 45
TC 3
Z9 3
U1 0
U2 13
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1750-5836
J9 INT J GREENH GAS CON
JI Int. J. Greenh. Gas Control
PD SEP
PY 2013
VL 17
BP 388
EP 396
DI 10.1016/j.ijggc.2013.05.029
PG 9
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels; Engineering,
Environmental
SC Science & Technology - Other Topics; Energy & Fuels; Engineering
GA 214RO
UT WOS:000324153700036
ER
PT J
AU Rubin, ES
Short, C
Booras, G
Davison, J
Ekstrom, C
Matuszewski, M
Mccoy, S
AF Rubin, Edward S.
Short, Christopher
Booras, George
Davison, John
Ekstrom, Clas
Matuszewski, Michael
McCoy, Sean
TI A proposed methodology for CO2 capture and storage cost estimates
SO INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
LA English
DT Article
DE CO2 capture and storage; CCS costs; Costing methods; Cost reporting;
Levelized cost of electricity
ID POWER-PLANTS; CAPACITY ESTIMATION; CARBON CAPTURE
AB There are significant differences in the methods employed by various organizations to estimate the cost of carbon capture and storage (CCS) systems for fossil fuel power plants. Such differences often are not apparent in publicly reported CCS cost estimates, and thus contribute to misunderstanding, confusion, and mis-representation of CCS cost information, especially among audiences not familiar with the details of CCS costing. Given the international importance of CCS as an option for climate change mitigation, efforts to harmonize methods of estimating CCS costs and improving the communication of cost assumptions and results are especially urgent and timely. Based on an analysis of current deficiencies, this paper recommends a common costing methodology plus guidelines for CCS cost reporting to improve the clarity and consistency of cost estimates for greenhouse gas mitigation measures. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Rubin, Edward S.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
[Short, Christopher] Global Carbon Capture & Storage Inst, Canberra, ACT, Australia.
[Booras, George] Elect Power Res Inst, Palo Alto, CA USA.
[Davison, John] Int Energy Agcy Greenhouse Gas Programme, Cheltenham, Glos, England.
[Ekstrom, Clas] Vattenfall AB, Stockholm, Sweden.
[Matuszewski, Michael] US DOE, Natl Energy Technol Lab, Pittsburgh, PA USA.
[McCoy, Sean] Int Energy Agcy, Paris, France.
RP Rubin, ES (reprint author), Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
EM rubin@cmu.edu
OI McCoy, Sean/0000-0003-0401-893X
NR 25
TC 27
Z9 27
U1 4
U2 27
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1750-5836
J9 INT J GREENH GAS CON
JI Int. J. Greenh. Gas Control
PD SEP
PY 2013
VL 17
BP 488
EP 503
DI 10.1016/j.ijggc.2013.06.004
PG 16
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels; Engineering,
Environmental
SC Science & Technology - Other Topics; Energy & Fuels; Engineering
GA 214RO
UT WOS:000324153700045
ER
PT J
AU Birkholzer, JT
Nicot, JP
Oldenburg, CM
Zhou, QL
Kraemer, S
Bandilla, K
AF Birkholzer, Jens T.
Nicot, Jean Philippe
Oldenburg, Curtis M.
Zhou, Quanlin
Kraemer, Stephen
Bandilla, Karl
TI Reply to comments by Schnaar et al. on "Brine flow up a well caused by
pressure perturbation from geologic carbon sequestration: Static and
dynamic evaluations" by Birkholzer et al. (2011)
SO INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
LA English
DT Letter
C1 [Birkholzer, Jens T.; Oldenburg, Curtis M.; Zhou, Quanlin] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Nicot, Jean Philippe] Univ Texas Austin, Bur Econ Geol, Austin, TX 78713 USA.
[Kraemer, Stephen; Bandilla, Karl] US EPA, Off Res & Dev, Athens, GA 30605 USA.
RP Birkholzer, JT (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
EM jtbirkholzer@lbl.gov
RI Zhou, Quanlin/B-2455-2009; Oldenburg, Curtis/L-6219-2013; Birkholzer,
Jens/C-6783-2011; Nicot, Jean-Philippe/A-3954-2009
OI Zhou, Quanlin/0000-0001-6780-7536; Oldenburg,
Curtis/0000-0002-0132-6016; Birkholzer, Jens/0000-0002-7989-1912;
NR 4
TC 0
Z9 0
U1 0
U2 6
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1750-5836
J9 INT J GREENH GAS CON
JI Int. J. Greenh. Gas Control
PD SEP
PY 2013
VL 17
BP 544
EP 545
DI 10.1016/j.ijggc.2013.06.001
PG 2
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels; Engineering,
Environmental
SC Science & Technology - Other Topics; Energy & Fuels; Engineering
GA 214RO
UT WOS:000324153700051
ER
PT J
AU Kyle, P
Davies, EGR
Dooley, JJ
Smith, SJ
Clarke, LE
Edmonds, JA
Hejazi, M
AF Kyle, Page
Davies, Evan G. R.
Dooley, James J.
Smith, Steven J.
Clarke, Leon E.
Edmonds, James A.
Hejazi, Mohamad
TI Influence of climate change mitigation technology on global demands of
water for electricity generation (vol 13, pg 112, 2013)
SO INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
LA English
DT Correction
C1 [Kyle, Page; Dooley, James J.; Smith, Steven J.; Clarke, Leon E.; Edmonds, James A.; Hejazi, Mohamad] Pacific NW Natl Lab, Joint Global Change Res Inst, College Pk, MD 20740 USA.
[Davies, Evan G. R.] Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB T6G 2W2, Canada.
RP Kyle, P (reprint author), Pacific NW Natl Lab, Joint Global Change Res Inst, 5825 Univ Res Court,Suite 3500, College Pk, MD 20740 USA.
EM pkyle@pnnl.gov
RI Davies, Evan/A-3379-2008
OI Davies, Evan/0000-0003-0536-333X
NR 1
TC 0
Z9 0
U1 2
U2 16
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1750-5836
J9 INT J GREENH GAS CON
JI Int. J. Greenh. Gas Control
PD SEP
PY 2013
VL 17
BP 549
EP 552
DI 10.1016/j.ijggc.2013.03.017
PG 4
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels; Engineering,
Environmental
SC Science & Technology - Other Topics; Energy & Fuels; Engineering
GA 214RO
UT WOS:000324153700053
ER
PT J
AU Yue, P
Di, LP
Wei, YX
Han, WG
AF Yue, Peng
Di, Liping
Wei, Yaxing
Han, Weiguo
TI Intelligent services for discovery of complex geospatial features from
remote sensing imagery
SO ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
LA English
DT Article
DE Image mining; Geospatial services; Workflow; Semantic; Feature
discovery; GIS; Complex geospatial features
ID TOPOLOGICAL SPATIAL RELATIONS; WEB SERVICE; GEOGRAPHIC INFORMATION; DATA
INFRASTRUCTURES; ROAD EXTRACTION; SEMANTIC WEB; LIDAR DATA; ONTOLOGY;
CLASSIFICATION; GEODATA
AB Remote sensing imagery has been commonly used by intelligence analysts to discover geospatial features, including complex ones. The overwhelming volume of routine image acquisition requires automated methods or systems for feature discovery instead of manual image interpretation. The methods of extraction of elementary ground features such as buildings and roads from remote sensing imagery have been studied extensively. The discovery of complex geospatial features, however, is still rather understudied. A complex feature, such as a Weapon of Mass Destruction (WMD) proliferation facility, is spatially composed of elementary features (e.g., buildings for hosting fuel concentration machines, cooling towers, transportation roads, and fences). Such spatial semantics, together with thematic semantics of feature types, can be used to discover complex geospatial features. This paper proposes a workflow-based approach for discovery of complex geospatial features that uses geospatial semantics and services. The elementary features extracted from imagery are archived in distributed Web Feature Services (WFSs) and discoverable from a catalogue service. Using spatial semantics among elementary features and thematic semantics among feature types, workflow-based service chains can be constructed to locate semantically-related complex features in imagery. The workflows are reusable and can provide on-demand discovery of complex features in a distributed environment. (C) 2013 International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS) Published by Elsevier B.V. All rights reserved.
C1 [Yue, Peng; Di, Liping; Han, Weiguo] George Mason Univ, CSISS, Fairfax, VA 22032 USA.
[Yue, Peng] Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430079, Peoples R China.
[Wei, Yaxing] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Di, LP (reprint author), George Mason Univ, CSISS, 10519 Braddock Rd STE 2900, Fairfax, VA 22032 USA.
EM ldi@gmu.edu
RI Wei, Yaxing/K-1507-2013; Han, Weiguo/N-1791-2014
OI Wei, Yaxing/0000-0001-6924-0078; Han, Weiguo/0000-0002-2760-0909
FU U.S. Department of Energy [DE-NA0001123]; National Basic Research
Program of China [2011CB707105]; NSFC; [41271397]
FX We are grateful to the anonymous reviewers for their valuable comments.
Part of the work discussed in the paper was funded by U.S. Department of
Energy (Grant #DE-NA0001123, PI: Prof. Liping Di), National Basic
Research Program of China (2011CB707105), and Project 41271397 supported
by NSFC. The authors would also like to thank Ms. Julia Di for editing
and proofreading the manuscript.
NR 72
TC 15
Z9 16
U1 4
U2 63
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0924-2716
EI 1872-8235
J9 ISPRS J PHOTOGRAMM
JI ISPRS-J. Photogramm. Remote Sens.
PD SEP
PY 2013
VL 83
BP 151
EP 164
DI 10.1016/j.isprsjprs.2013.02.015
PG 14
WC Geography, Physical; Geosciences, Multidisciplinary; Remote Sensing;
Imaging Science & Photographic Technology
SC Physical Geography; Geology; Remote Sensing; Imaging Science &
Photographic Technology
GA 212WQ
UT WOS:000324013900014
ER
PT J
AU Davis, CE
Epton, M
Frank, M
Gryshuk, A
Kenyon, NJ
AF Davis, Cristina E.
Epton, Michael
Frank, Matthias
Gryshuk, Amy
Kenyon, Nicholas J.
TI Emerging topics and new developments in the field: the 2012
international breath analysis meeting
SO JOURNAL OF BREATH RESEARCH
LA English
DT Article
AB The 2012 International Breath Analysis meeting was held in Sonoma, CA (USA) from 28 October-01 November 2012. The focus of the meeting covered several important topics within the research area, including both engineering and the biomedical sciences. As human breath analysis further develops as a multi-disciplinary field, it is clear that sensor development, instrumentation systems and algorithms play critical roles. Although much emphasis in the last decade has focused on breath biomarker compound identification and physiological relevance, we increasingly turn our attention toward portable, fieldable sensor platforms for non-invasive breath monitoring. The mission of this workshop was to assemble a group of leading experts to discuss their own research, debate trends and future directions of the field, and contemplate areas of research that deserve special attention moving forward.
C1 [Davis, Cristina E.] Univ Calif Davis, Dept Mech & Aerosp Engn, Davis, CA 95616 USA.
[Epton, Michael] Christchurch Hosp, Canterbury Resp Res Grp, Canterbury 8022, New Zealand.
[Frank, Matthias; Gryshuk, Amy] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA.
[Kenyon, Nicholas J.] Univ Calif Davis, Ctr Comparat Resp Biol & Med, Div Pulm Crit Care & Sleep Med, Davis, CA 95616 USA.
RP Davis, CE (reprint author), Univ Calif Davis, Dept Mech & Aerosp Engn, Davis, CA 95616 USA.
EM cedavis@ucdavis.edu
RI Davis, Cristina/C-4437-2008; Frank, Matthias/O-9055-2014
FU UC Davis School of Medicine; Lawrence Livermore National Laboratory;
Fairmont Sonoma Mission Inn; PSAV Presentation Services; US Department
of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344];
MGC Diagnostics, Inc.; Aerocrine, Inc.; Shinwa Chemical Industries,
Ltd.; Respiratory Research, Inc.; PAS Technology, GmbH.; Center for
Biophotonics Science and Technology at UC Davis; National Science
Foundation [PHY 0120999]; National Center for Advancing Translational
Sciences a component of the National Institutes of Health (NIH) [UL1
TR000002]; NIH Roadmap for Medical Research; NIH [HL 105573]; Gilead
Sciences, Inc.; Department of the Army; Hartwell Foundation; Soberlink,
Inc.; Office of Naval Research
FX The organizing committee acknowledges the financial support by UC Davis
School of Medicine and by Lawrence Livermore National Laboratory as well
as the hospitality and logistical support by the Fairmont Sonoma Mission
Inn and PSAV Presentation Services that all helped make this conference
possible. Part of this work was performed under the auspices of the US
Department of Energy by Lawrence Livermore National Laboratory under
contract DE-AC52-07NA27344. Financial support was also by our industrial
sponsors: MGC Diagnostics, Inc.; Aerocrine, Inc.; Shinwa Chemical
Industries, Ltd.; Respiratory Research, Inc.; PAS Technology, GmbH.; and
The Center for Biophotonics Science and Technology at UC Davis (this
work has been supported by funding from the National Science Foundation.
The Center for Biophotonics, an NSF Science and Technology Center, is
managed by the University of California, Davis, under cooperative
agreement no. PHY 0120999).; The organizing committee themselves have
research support from several funding agencies. This content of this
work is solely the responsibility of the authors and does not
necessarily represent the official view of these agencies. Partial
support is acknowledged from: UL1 TR000002 from the National Center for
Advancing Translational Sciences a component of the National Institutes
of Health (NIH), and NIH Roadmap for Medical Research [CED, NJK]; NIH
#HL 105573 [NJK]; Gilead Sciences, Inc. [CED]; Department of the Army
[CED], The Hartwell Foundation [CED, NJK]; Soberlink, Inc. [CED]; Office
of Naval Research [CED].
NR 3
TC 4
Z9 4
U1 0
U2 10
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1752-7155
J9 J BREATH RES
JI J. Breath Res.
PD SEP
PY 2013
VL 7
IS 3
AR 039001
DI 10.1088/1752-7155/7/3/039001
PG 9
WC Biochemical Research Methods; Respiratory System
SC Biochemistry & Molecular Biology; Respiratory System
GA 214FQ
UT WOS:000324117800019
PM 23999878
ER
PT J
AU Manginell, RP
Pimentel, AS
Mowry, CD
Mangan, MA
Moorman, MW
Allen, A
Schares, ES
Achyuthan, KE
AF Manginell, Ronald P.
Pimentel, Adam S.
Mowry, Curtis D.
Mangan, Michael A.
Moorman, Matthew W.
Allen, Amy
Schares, Elizabeth S.
Achyuthan, Komandoor E.
TI Diagnostic potential of the pulsed discharged helium ionization detector
(PDHID) for pathogenic Mycobacterial volatile biomarkers
SO JOURNAL OF BREATH RESEARCH
LA English
DT Article
ID ELECTRON-CAPTURE DETECTOR; GAS-CHROMATOGRAPHY; ORGANIC-COMPOUNDS;
PULMONARY TUBERCULOSIS; MOBILITY SPECTROMETRY; BREATH TEST; IN-VITRO;
NOSE; IDENTIFICATION; BACTERIA
AB Pathogenic Mycobacteria cause diseases in animals and humans with significant economic and societal consequences. Current methods for Mycobacterial detection relies upon time- and labor-intensive techniques such as culturing or DNA analysis. Using gas chromatography and mass spectrometry, four volatile compounds (methyl phenylacetate, methyl p-anisate, methyl nicotinate and o-phenyl anisole) were recently proposed as potential biomarkers for Mycobacteria. We demonstrate for the first time the capabilities of a field-deployable, pulsed discharge helium ionization detector (PDHID) for sensing these volatiles. We determined the analytical performance of the PDHID toward these Mycobacterial volatiles. Detector performance was moderately affected over the temperature range of 150 to 350 degrees C. The linear dynamic range for all four analytes exceeded three orders of magnitude. The limits of detection (LOD) and quantitation (LOQ) were calculated as 150 and 450 pg respectively, for all compounds, except methyl phenylacetate (LOD and LOQ, 90 and 270 pg, respectively). Control charts revealed that the PDHID detection system was generally stable, and deviations could be traced to common causes and excluded special causes. Grob tests and ionization potential data suggest that the PDHID is capable of detecting Mycobacterial volatiles in a complex milieu such as culture headspace or breath samples from tuberculosis patients. The diagnostic potential of the PDHID is critical to our goal of a handheld, field-deployable 'sniffer' system for biological pathogens and chemical warfare agents.
C1 [Manginell, Ronald P.; Moorman, Matthew W.] Sandia Natl Labs, Microsyst Enabled Detect Dept, Albuquerque, NM 87185 USA.
[Pimentel, Adam S.] LMATA Govt Serv LLC, Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Mowry, Curtis D.] Sandia Natl Labs, Mat Characterizat Dept, Albuquerque, NM 87185 USA.
[Mangan, Michael A.] Sandia Natl Labs, Photon Microsyst Technol Dept, Albuquerque, NM 87185 USA.
[Allen, Amy] Sandia Staffing Alliance LLC, Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Schares, Elizabeth S.] New Mexico Inst Min & Technol, Dept Chem Engn, Albuquerque, NM 87185 USA.
[Schares, Elizabeth S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Achyuthan, Komandoor E.] Sandia Natl Labs, Biosensors & Nanomat Dept, Albuquerque, NM 87185 USA.
RP Manginell, RP (reprint author), Sandia Natl Labs, Microsyst Enabled Detect Dept, POB 5800,MS0892, Albuquerque, NM 87185 USA.
EM rpmangi@sandia.gov
FU United States Department of Energy [DE-AC04-94AL85000]; Sandia's
Laboratory Directed Research and Development (LDRD) project [151318]
FX Sandia is a multiprogram laboratory operated by Sandia Corp., a Lockheed
Martin Company, for the United States Department of Energy under
Contract DE-AC04-94AL85000. These investigations were funded by Sandia's
Laboratory Directed Research and Development (LDRD) project 151318.
NR 53
TC 5
Z9 5
U1 5
U2 36
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1752-7155
J9 J BREATH RES
JI J. Breath Res.
PD SEP
PY 2013
VL 7
IS 3
AR 037107
DI 10.1088/1752-7155/7/3/037107
PG 9
WC Biochemical Research Methods; Respiratory System
SC Biochemistry & Molecular Biology; Respiratory System
GA 214FQ
UT WOS:000324117800015
PM 23867723
ER
PT J
AU Poulsen, CJ
Zhou, J
AF Poulsen, Christopher J.
Zhou, Jing
TI Sensitivity of Arctic Climate Variability to Mean State: Insights from
the Cretaceous
SO JOURNAL OF CLIMATE
LA English
DT Article
DE Climate variability; Paleoclimate; Climate models
ID OCEAN HEAT-TRANSPORT; THERMOHALINE CIRCULATION; SYSTEM MODEL; SEA-ICE;
THERMAL MAXIMUM; CCSM3; TEMPERATURES; WARM; AMPLIFICATION; OSCILLATION
AB This study investigates Arctic climate variability during a period of extreme warmth using the Community Climate System Model, version 3 (CCSM3) coupled ocean-atmosphere general circulation model. Four mid-Cretaceous simulations were completed with different CO2 levels (1, 10, and 16 times preindustrial levels with dynamic vegetation) and vegetation treatments (10 times with specified uniform bare ground). The magnitude and frequency of Arctic temperature variability is highly sensitive to the mean state and high-latitude upper-ocean static stability. As stability increases with a rise in CO2 levels from 1 to 10 times preindustrial levels, the frequency of temperature variability increases from decades (1x) to centuries (10x with bare ground) and longer (10x) and the peak-to-peak magnitude increases from similar to 1 degrees (for 1x) to similar to 2 degrees C (for 10x). In the 16x simulation with a highly stratified ocean, Arctic temperature variability is low with peak-to-peak magnitudes <0.5 degrees C. Under low CO2, Arctic climate variability is tied to sensible heat release from the ocean during movement of the sea ice margin. In absence of substantial sea ice, variability is driven by mass transport and upper-ocean salinity advection into the Arctic. In both cases, destruction of low-level clouds acts as an important feedback on low-level warming. The authors also report a link between unforced Arctic climate variability and North Pacific meridional overturning with warming events leading intensification. These results suggest that the nature of Arctic climate variability was likely much different in past climates and is likely to be so in the future.
C1 [Poulsen, Christopher J.; Zhou, Jing] Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA.
[Zhou, Jing] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Poulsen, CJ (reprint author), Univ Michigan, Dept Earth & Environm Sci, 2534 CC Little Bldg,1100 North Univ Ave, Ann Arbor, MI 48109 USA.
EM poulsen@umich.edu
RI Poulsen, Christopher/C-6213-2009
OI Poulsen, Christopher/0000-0001-5104-4271
FU National Science Foundations' Paleoclimate Program [0433440]; University
of Michigan
FX This study was financially supported by a grant (0433440) from the
National Science Foundations' Paleoclimate Program to C. Poulsen and a
Barbour Scholarship from the University of Michigan to J. Zhou. We thank
E. Brady, B. Briegleb, C. Shields, and N. Rosenbloom for assistance with
CCSM3, and three reviewers for their constructive comments. The CCSM3
simulations were run at the National Center for Atmospheric Research
(NCAR).
NR 67
TC 7
Z9 7
U1 1
U2 18
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0894-8755
EI 1520-0442
J9 J CLIMATE
JI J. Clim.
PD SEP
PY 2013
VL 26
IS 18
BP 7003
EP 7022
DI 10.1175/JCLI-D-12-00825.1
PG 20
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 213LB
UT WOS:000324057600015
ER
PT J
AU Zelt, CA
Haines, S
Powers, MH
Sheehan, J
Rohdewald, S
Link, C
Hayashi, K
Zhao, D
Zhou, HW
Burton, BL
Petersen, UK
Bonal, ND
Doll, WE
AF Zelt, Colin A.
Haines, Seth
Powers, Michael H.
Sheehan, Jacob
Rohdewald, Siegfried
Link, Curtis
Hayashi, Koichi
Zhao, Don
Zhou, Hua-wei
Burton, Bethany L.
Petersen, Uni K.
Bonal, Nedra D.
Doll, William E.
TI Blind Test of Methods for Obtaining 2-D Near-Surface Seismic Velocity
Models from First-Arrival Traveltimes
SO JOURNAL OF ENVIRONMENTAL AND ENGINEERING GEOPHYSICS
LA English
DT Article
ID GROUNDWATER CONTAMINATION SITE; SHEAR-WAVE VELOCITY; TOMOGRAPHY;
REFRACTION; INVERSION; SEDIMENTS
AB Seismic refraction methods are used in environmental and engineering studies to image the shallow subsurface. We present a blind test of inversion and tomographic refraction analysis methods using a synthetic first-arrival-time dataset that was made available to the community in 2010. The data are realistic in terms of the near-surface velocity model, shot-receiver geometry and the data's frequency and added noise. Fourteen estimated models were determined by ten participants using eight different inversion algorithms, with the true model unknown to the participants until it was revealed at a session at the 2011 SAGEEP meeting. The estimated models are generally consistent in terms of their large-scale features, demonstrating the robustness of refraction data inversion in general, and the eight inversion algorithms in particular. When compared to the true model, all of the estimated models contain a smooth expression of its two main features: a large offset in the bedrock and the top of a steeply dipping low-velocity fault zone. The estimated models do not contain a subtle low-velocity zone and other fine-scale features, in accord with conventional wisdom. Together, the results support confidence in the reliability and robustness of modern refraction inversion and tomographic methods.
C1 [Zelt, Colin A.] Rice Univ, Dept Earth Sci, Houston, TX 77005 USA.
[Haines, Seth] US Geol Survey, Denver Fed Ctr, Cent Energy Resources Sci Ctr, Denver, CO 80225 USA.
[Powers, Michael H.; Burton, Bethany L.] US Geol Survey, Crustal Geophys & Geochem Sci Ctr, Denver, CO 80225 USA.
[Sheehan, Jacob] Zonge Int Inc, Lakewood, CO 80214 USA.
[Rohdewald, Siegfried] Intelligent Resources Inc, Vancouver, BC V6C 1A1, Canada.
[Link, Curtis] Montana Tech Univ, Dept Geophys Engn, Butte, MT 59701 USA.
[Hayashi, Koichi] Geometrics, San Jose, CA 95131 USA.
[Zhao, Don] Geogiga Technol Corp, Calgary, AB T2P 3N4, Canada.
[Zhou, Hua-wei] Univ Houston, Dept Earth & Atmospher Sci, Houston, TX 77204 USA.
[Petersen, Uni K.] Faroes Earth & Energy Directorate, Torshavn, Faroe Islands, Denmark.
[Bonal, Nedra D.] Sandia Natl Labs, Albuquerque, NM 87123 USA.
[Doll, William E.] Battelle Mem Inst, Oak Ridge, TN 37830 USA.
RP Zelt, CA (reprint author), Rice Univ, Dept Earth Sci, MS 126,6100 Main St, Houston, TX 77005 USA.
EM czelt@rice.edu; shaines@usgs.gov; mhpowers@usgs.gov;
jacob.sheehan@zonge.us; info@rayfract.com; clink@mtech.edu;
khayashi@geometrics.com; don@geogiga.com; hzhou@uh.edu;
blburton@usgs.gov; up@jf.fo; nbonal@sandia.gov; dollw@battelle.org
FU DOE [DE-FG02-03ER63662]; U.S. Department of Energy's National Nuclear
Security Administration [DE-AC04-94AL85000]
FX Karl J. Ellefsen (U.S. Geological Survey) and Leiph A. Preston (Sandia
National Laboratories) helped to develop models 12 and 14, respectively.
The review of the manuscript by Karl J. Ellefsen is gratefully
acknowledged. CZ acknowledges support from DOE grant DE-FG02-03ER63662.
Sandia National Laboratories is a multi-program laboratory operated by
Sandia Corporation, a wholly owned subsidiary of Lockheed Martin
company, for the U.S. Department of Energy's National Nuclear Security
Administration under contract DE-AC04-94AL85000. References to any
specific commercial product, process, or service by trade name,
trademark, manufacturer, or otherwise does not constitute or imply its
endorsement, recommendation, or favoring by the United States Government
or any agency thereof.
NR 29
TC 3
Z9 4
U1 3
U2 11
PU ENVIRONMENTAL ENGINEERING GEOPHYSICAL SOC
PI DENVER
PA 1720 SOUTH BELLAIRE, STE 110, DENVER, CO 80222-433 USA
SN 1083-1363
J9 J ENVIRON ENG GEOPH
JI J. Environ. Eng. Geophys.
PD SEP
PY 2013
VL 18
IS 3
BP 183
EP 194
DI 10.2113/JEEG18.3.183
PG 12
WC Geochemistry & Geophysics; Engineering, Geological
SC Geochemistry & Geophysics; Engineering
GA 219LK
UT WOS:000324508300003
ER
PT J
AU Franko, KJ
Lele, SK
AF Franko, Kenneth J.
Lele, Sanjiva K.
TI Breakdown mechanisms and heat transfer overshoot in hypersonic zero
pressure gradient boundary layers
SO JOURNAL OF FLUID MECHANICS
LA English
DT Article
DE compressible boundary layers; turbulence simulation; turbulent
transition
ID DIRECT NUMERICAL-SIMULATION; FLAT-PLATE; MACH-NUMBER; PART 1;
TRANSITION; RECEPTIVITY; LAMINAR; DISTURBANCES; STREAKS; RESOLUTION
AB A laminar Mach 6 flat plate boundary layer is perturbed using three different types of disturbances introduced through blowing and suction. The linear and nonlinear development and eventual breakdown to turbulence are investigated using direct numerical simulation. The three different transition mechanisms compared are first mode oblique breakdown, second mode oblique breakdown and second mode fundamental resonance. The focus of the present work is to compare the nonlinear development and breakdown to turbulence for the different transition mechanisms and explain the heat transfer overshoot observed in experiments. First mode oblique breakdown leads to the shortest transition length and a clear peak in wall heat transfer in the transitional region. For all three transition mechanisms, the development of streamwise streaks precedes the breakdown to fully turbulent flow. The modal linear and nonlinear development are analysed including the breakdown of the streaks. The effect of wall cooling is investigated for second mode fundamental resonance and no qualitative differences in the nonlinear processes are observed. Finally, the development towards fully turbulent flow including mean flow, turbulent spectra, and turbulent fluctuations is shown and the first mode oblique breakdown simulation shows the furthest development towards a fully turbulent flow.
C1 [Franko, Kenneth J.; Lele, Sanjiva K.] Stanford Univ, Dept Aeronaut & Astronaut, Stanford, CA 94305 USA.
RP Franko, KJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM kjfrank@sandia.gov
FU Phase-I STTR at Stanford University; AFOSR; Department of Defense [AFOSR
FA9550-10-C-0174]; Fannie and John Hertz Foundation Fellowship; Stanford
Graduate Fellowship
FX Support was provided by a Phase-I STTR at Stanford University in
partnership with Cascade Technologies, Mountain View, CA with support
from AFOSR (Dr J. Schmisseur, Program Manager). It is now continuing as
a Phase-II effort under a sub-award to Stanford University (Cascade
Technologies, prime contractor) with support from AFOSR. We appreciate
technical discussion and help from Professors G. Iaccarino, Dr O.
Marxen, and Dr R. Bhaskaran. We appreciate technical discussions with Dr
M. Holden of CUBRC and with Dr O. Ramesh of IISc, Bangalore, regarding
heat transfer overshoot. S. K. L. acknowledges very useful discussion
with Professor R. Narasimha regarding the overshoot in figure 31. The
presentation in the paper benefited from this discussion. Computational
resources were provided by the Department of Defense through contract
AFOSR FA9550-10-C-0174. K. J. F. thanks the Fannie and John Hertz
Foundation Fellowship and Stanford Graduate Fellowship for support. We
appreciate the referees' helpful comments and suggestions which
significantly improved the paper.
NR 62
TC 3
Z9 3
U1 1
U2 15
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-1120
J9 J FLUID MECH
JI J. Fluid Mech.
PD SEP
PY 2013
VL 730
BP 491
EP 532
DI 10.1017/jfm.2013.350
PG 42
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 216GN
UT WOS:000324270200007
ER
PT J
AU Alonso-Gutierrez, J
Chan, R
Batth, TS
Adams, PD
Keasling, JD
Petzold, CJ
Lee, TS
AF Alonso-Gutierrez, Jorge
Chan, Rossana
Batth, Tanveer S.
Adams, Paul D.
Keasling, Jay D.
Petzold, Christopher J.
Lee, Taek Soon
TI Metabolic engineering of Escherichia coli for limonene and perillyl
alcohol production
SO METABOLIC ENGINEERING
LA English
DT Article
DE Limonene; Perillyl alcohol; Mevalonate pathway; Microbial production;
Metabolic engineering; Escherichia coli
ID HETEROLOGOUS MEVALONATE PATHWAY; PSEUDOMONAS-PUTIDA; GENE; MONOTERPENES;
EXPRESSION; TERPENOIDS; PROTEIN; OPTIMIZATION; BACTERIA; SEQUENCE
AB Limonene is a valuable monoterpene used in the production of several commodity chemicals and medicinal compounds. Among them, perillyl alcohol (FOR) is a promising anti-cancer agent that can be produced by hydroxylation of limonene. We engineered E. coli with a heterologous mevalonate pathway and limonene synthase for production of limonene followed by coupling with a cytochrome P450, which specifically hydroxylates limonene to produce FOR. A strain containing all mevalonate pathway genes in a single plasmid produced limonene at titers over 400 mg/L from glucose, substantially higher than has been achieved in the past. Incorporation of a cytochrome P450 to hydroxylate limonene yielded approximately 100 mg/L of FOR. Further metabolic engineering of the pathway and in situ product recovery using anion exchange resins would make this engineered E. cob a potential production platform for any valuable limonene derivative. (C) 2013 Elsevier Inc. All rights reserved.
C1 [Alonso-Gutierrez, Jorge; Chan, Rossana; Batth, Tanveer S.; Adams, Paul D.; Keasling, Jay D.; Petzold, Christopher J.; Lee, Taek Soon] Joint Bioenergy Inst, Emeryville, CA 94608 USA.
[Alonso-Gutierrez, Jorge; Chan, Rossana; Batth, Tanveer S.; Adams, Paul D.; Keasling, Jay D.; Petzold, Christopher J.; Lee, Taek Soon] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
[Keasling, Jay D.] Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA.
[Keasling, Jay D.] Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USA.
RP Lee, TS (reprint author), Joint Bioenergy Inst, 5885 Hollis St, Emeryville, CA 94608 USA.
EM tslee@lbl.gov
RI Keasling, Jay/J-9162-2012; Adams, Paul/A-1977-2013
OI Keasling, Jay/0000-0003-4170-6088; Adams, Paul/0000-0001-9333-8219
FU U.S. Department of Energy, Office of Science, Office of Biological and
Environmental Research [DE-AC02-05CH11231]; Fundacion Ramon Areces
FX The authors thank James Kirby, Pamela Peralta-Yahya at JBEI and Seon-Won
Kim at Gyeongsang National University in Korea for helpful discussions.
This work was part of the DOE Joint BioEnergy Institute
(http://www.jbei.org) supported by the U.S. Department of Energy, Office
of Science, Office of Biological and Environmental Research, through
contract DE-AC02-05CH11231 between Lawrence Berkeley National Laboratory
and the U.S. Department of Energy. J.A-G. thanks "Fundacion Ramon
Areces" for his postdoctoral fellowship.
NR 44
TC 93
Z9 97
U1 8
U2 111
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1096-7176
J9 METAB ENG
JI Metab. Eng.
PD SEP
PY 2013
VL 19
BP 33
EP 41
DI 10.1016/j.ymben.2013.05.004
PG 9
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 214UO
UT WOS:000324162100005
PM 23727191
ER
PT J
AU Weston, DJ
Wullschleger, SD
Tuskan, GA
AF Weston, David J.
Wullschleger, Stan D.
Tuskan, Gerald A.
TI Extending the Arabidopsis flowering paradigm to a mass flowering
phenomenon in the tropics
SO MOLECULAR ECOLOGY
LA English
DT News Item
DE drought; ecological genomics; mass flowering; transcriptomics
ID DIPTEROCARPACEAE; ECOLOGY
AB Flowering time is a critical life history trait, one that is shaped by evolution to maximize fecundity, reproductive success and fitness (Amasino 2010). This is especially true of annual plants where the cycle of floral initiation, pollination and seed production occur at regular intervals to ensure the survival of the species. In long-lived perennials, however, flowering can be an intermittent phenomenon and thus a challenge to understand. In this issue of Molecular Ecology, Kobayashi et al. (2013) tackle this particular challenge by applying modern-day molecular techniques to the 'spectacular and mysterious' mass flowering that takes places in mixed dipterocarp forests of South-East Asia. Here, amidst an almost unimaginable diversity of forbs, shrubs and trees, these authors used next-generation sequencing technology to characterize what they refer to as the 'ecological transcriptome' in an attempt to glimpse into the functional genomic reprogramming of Shorea beccariana at pre-and postflowering developmental transitions. They encountered many of the challenges that are often underappreciated yet typical for tropical ecological research including sample collection within a similar to 40-m high tree canopy, unpredictable flowering intervals and determining the most appropriate pre-flowering state for sampling. Despite these challenges, the authors were able to integrate gene ontology relationships with gene-clustering algorithms and environmental data to support the hypothesis that drought is a key trigger for flowering in S. beccariana. The cloning and transgenic expression of selected S. beccariana genes to corroborate presumed protein function is a key feature of their work and seldom applied within an ecological framework. As illustrated by Kobayashi et al. (2013), the inclusion of molecular biology, genomics and bioinformatics has the potential to shed light on long-standing questions of ecological concern.
C1 [Weston, David J.; Tuskan, Gerald A.] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN 37831 USA.
[Wullschleger, Stan D.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Weston, DJ (reprint author), Oak Ridge Natl Lab, Biosci Div, POB 2008 MS-6407, Oak Ridge, TN 37831 USA.
EM westondj@ornl.gov
RI Wullschleger, Stan/B-8297-2012; Tuskan, Gerald/A-6225-2011
OI Wullschleger, Stan/0000-0002-9869-0446; Tuskan,
Gerald/0000-0003-0106-1289
NR 11
TC 1
Z9 1
U1 1
U2 38
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0962-1083
J9 MOL ECOL
JI Mol. Ecol.
PD SEP
PY 2013
VL 22
IS 18
BP 4603
EP 4605
DI 10.1111/mec.12473
PG 3
WC Biochemistry & Molecular Biology; Ecology; Evolutionary Biology
SC Biochemistry & Molecular Biology; Environmental Sciences & Ecology;
Evolutionary Biology
GA 212ZP
UT WOS:000324022600001
PM 24167825
ER
PT J
AU Hambleton, KM
Kurtz, DW
Prsa, A
Guzik, JA
Pavlovski, K
Bloemen, S
Southworth, J
Conroy, K
Littlefair, SP
Fuller, J
AF Hambleton, K. M.
Kurtz, D. W.
Prsa, A.
Guzik, J. A.
Pavlovski, K.
Bloemen, S.
Southworth, J.
Conroy, K.
Littlefair, S. P.
Fuller, J.
TI KIC 4544587: an eccentric, short-period binary system with delta Sct
pulsations and tidally excited modes
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE binaries: eclipsing; stars: individual: KIC 4544587; stars:
oscillations; stars: variables: delta Scuti
ID ZZ CETI STARS; GAMMA-DORADUS; COMPONENT SPECTRA; ECLIPSING BINARIES;
SCUTI STAR; KEPLER OBSERVATIONS; STELLAR PULSATIONS; RADIAL-VELOCITIES;
MAIN-SEQUENCE; SPACED DATA
AB We present Kepler photometry and ground-based spectroscopy of KIC 4544587, a short-period eccentric eclipsing binary system with self-excited pressure and gravity modes, tidally excited modes, tidally influenced p modes and rapid apsidal motion of 182 yr per cycle. The primary and secondary components of KIC 4544587 reside within the delta Scuti and gamma Dor instability region of the Hertzsprung-Russell diagram, respectively. By applying the binary modelling software phoebe to prewhitened Kepler photometric data and radial velocity data obtained using the William Herschel Telescope and 4-m Mayall telescope at Kitt Peak Northern Observatory (KPNO), the fundamental parameters of this important system have been determined, including the stellar masses, 1.98 +/- 0.07 and 1.60 +/- 0.06 M-circle dot, and radii, 1.76 +/- 0.03 and 1.42 +/- 0.02 R, for the primary and secondary components, respectively. Frequency analysis of the residual data revealed 31 modes, 14 in the gravity mode region and 17 in the pressure mode region. Of the 14 gravity modes, 8 are orbital harmonics: a signature of tidal resonance. While the measured amplitude of these modes may be partially attributed to residual signal from binary model subtraction, we demonstrate through consideration of the folded light curve that these frequencies do in fact correspond to tidally excited pulsations. Furthermore, we present an echelle diagram of the pressure mode frequency region (modulo the orbital frequency) and demonstrate that the tides are also influencing the p modes. A first look at asteroseismology hints that the secondary component is responsible for the p modes, which is contrary to our expectation that the hotter star should pulsate in higher radial overtone, higher frequency p modes.
C1 [Hambleton, K. M.; Kurtz, D. W.] Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England.
[Hambleton, K. M.; Bloemen, S.] Katholieke Univ Leuven, Inst Sterrenkunde, B-3001 Louvain, Belgium.
[Hambleton, K. M.; Prsa, A.] Villanova Univ, Dept Astron & Astrophys, Villanova, PA 19085 USA.
[Guzik, J. A.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Pavlovski, K.] Univ Zagreb, Fac Sci, Dept Phys, Zagreb 41000, Croatia.
[Southworth, J.] Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England.
[Conroy, K.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
[Littlefair, S. P.] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England.
[Fuller, J.] Cornell Univ, Dept Astron, Ctr Space Res, Ithaca, NY 14853 USA.
RP Hambleton, KM (reprint author), Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England.
EM kmhambleton@uclan.ac.uk
FU Science and Technology Funding Council (STFC); RAS; NASA Kepler PSP
grant [NNX12AD20G]; European Research Council under the European
Community [227224]; Research Council of KU Leuven [GOA/2008/04]; NASA's
Science Mission Directorate
FX We express our sincere thanks to NASA and the Kepler team for allowing
us to work with and analyse the Kepler data, making this work possible.
The Kepler mission is funded by NASA's Science Mission Directorate. This
work was also supported by the Science and Technology Funding Council
(STFC). We would also like to thank the RAS for providing grants which
enabled KH's attendance at conferences and thus enabled the development
of collaborations and the successful completion of this work. AP
acknowledges support through NASA Kepler PSP grant NNX12AD20G. The
research leading to these results has received funding from the European
Research Council under the European Community's Seventh Framework
Programme (FP7/2007-2013)/ERC grant agreement no. 227224 (PROSPERITY),
as well as from the Research Council of KU Leuven grant agreement
GOA/2008/04. We acknowledge the observations taken using the 4-m Mayall
telescope at the NOAO, survey number #11A-0022 and the Isaac Newton
Group of Telescopes for the use of the William Herschel Telescope (WHT).
The WHT is operated on the island of La Palma by the Isaac Newton Group
in the Spanish Observatorio del Roque de los Muchachos of the Instituto
de Astrofisica de Canarias. We would also like to thank Susan Thompson
and William Welsh for their comments and suggestions.
NR 79
TC 50
Z9 50
U1 0
U2 2
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 2
BP 925
EP 940
DI 10.1093/mnras/stt886
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207XO
UT WOS:000323638200002
ER
PT J
AU Xavier, HS
Gupta, RR
Sako, M
D'Andrea, CB
Frieman, JA
Galbany, L
Garnavich, PM
Marriner, J
Nichol, RC
Olmstead, MD
Schneider, DP
Smith, M
AF Xavier, Henrique S.
Gupta, Ravi R.
Sako, Masao
D'Andrea, Chris B.
Frieman, Joshua A.
Galbany, Lluis
Garnavich, Peter M.
Marriner, John
Nichol, Robert C.
Olmstead, Matthew D.
Schneider, Donald P.
Smith, Mathew
TI Properties of Type Ia supernovae inside rich galaxy clusters
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE supernovae: general; galaxies: clusters: general
ID DIGITAL SKY SURVEY; OSCILLATION SPECTROSCOPIC SURVEY; GIANT-BRANCH
STARS; STANDARD STELLAR LIBRARY; INITIAL MASS FUNCTION; TP-AGB MODELS;
DATA RELEASE; SDSS-III; HOST GALAXIES; LEGACY SURVEY
AB We used the Gaussian Mixture Brightest Cluster Galaxy catalogue and Sloan Digital Sky Survey-II supernovae data with redshifts measured by the Baryon Oscillation Spectroscopic Survey to identify 48 Type Ia supernovae (SNe Ia) residing in rich galaxy clusters and compare their properties with 1015 SNe Ia in the field. Their light curves were parametrized by the SALT2 model and the significance of the observed differences was assessed by a resampling technique. To test our samples and methods, we first looked for known differences between SNe Ia residing in active and passive galaxies. We confirm that passive galaxies host SNe Ia with smaller stretch, weaker colour-luminosity relation [beta of 2.54(22) against 3.35(14)], and that are similar to 0.1 mag more luminous after stretch and colour corrections. We show that only 0.02 per cent of random samples drawn from our set of SNe Ia in active galaxies can reach these values. Reported differences in the Hubble residuals scatter could not be detected, possibly due to the exclusion of outliers. We then show that, while most field and cluster SNe Ia properties are compatible at the current level, their stretch distributions are different (similar to 3 Sigma): besides having a higher concentration of passive galaxies than the field, the cluster's passive galaxies host SNe Ia with an average stretch even smaller than those in field passive galaxies (at 95 per cent confidence). We argue that the older age of passive galaxies in clusters is responsible for this effect since, as we show, old passive galaxies host SNe Ia with smaller stretch than young passive galaxies (similar to 4 Sigma).
C1 [Xavier, Henrique S.] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, Brazil.
[Xavier, Henrique S.; Gupta, Ravi R.; Sako, Masao] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA.
[D'Andrea, Chris B.; Nichol, Robert C.] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England.
[Frieman, Joshua A.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Frieman, Joshua A.] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
[Frieman, Joshua A.; Marriner, John] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
[Galbany, Lluis] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Bellaterra, Barcelona, Spain.
[Galbany, Lluis] Inst Super Tecn, Ctr Multidisciplinar Astrofis, P-1049001 Lisbon, Portugal.
[Garnavich, Peter M.] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
[Olmstead, Matthew D.] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA.
[Schneider, Donald P.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
[Schneider, Donald P.] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA.
[Smith, Mathew] Univ Western Cape, Dept Phys, ZA-7535 Cape Town, South Africa.
RP Xavier, HS (reprint author), Univ Sao Paulo, Inst Fis, Rua Matao,Travessa R,187, BR-05508090 Sao Paulo, Brazil.
EM hsxavier@if.usp.br
RI Galbany, Lluis/A-8963-2017
OI Galbany, Lluis/0000-0002-1296-6887
FU Alfred P. Sloan Foundation; National Science Foundation; US Department
of Energy Office of Science; University of Arizona; Brazilian
Participation Group; Brookhaven National Laboratory; University of
Cambridge; Carnegie Mellon University; University of Florida; French
Participation Group; German Participation Group; Harvard University;
Instituto de Astrofisica de Canarias; Michigan State/Notre Dame/JINA
Participation Group; Johns Hopkins University; Lawrence Berkeley
National Laboratory; Max Planck Institute for Astrophysics; Max Planck
Institute for Extraterrestrial Physics; New Mexico State University; New
York University; Ohio State University; Pennsylvania State University;
University of Portsmouth; Princeton University; Spanish Participation
Group; University of Tokyo; University of Utah; Vanderbilt University;
University of Virginia; University of Washington; Yale University
FX Funding for SDSS-III has been provided by the Alfred P. Sloan
Foundation, the Participating Institutions, the National Science
Foundation and the US Department of Energy Office of Science. The
SDSS-III website is http://www.sdss3.org/.; SDSS-III is managed by the
Astrophysical Research Consortium for the Participating Institutions of
the SDSS-III Collaboration including the University of Arizona, the
Brazilian Participation Group, Brookhaven National Laboratory,
University of Cambridge, Carnegie Mellon University, University of
Florida, the French Participation Group, the German Participation Group,
Harvard University, the Instituto de Astrofisica de Canarias, the
Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins
University, Lawrence Berkeley National Laboratory, Max Planck Institute
for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New
Mexico State University, New York University, Ohio State University,
Pennsylvania State University, University of Portsmouth, Princeton
University, the Spanish Participation Group, University of Tokyo,
University of Utah, Vanderbilt University, University of Virginia,
University of Washington and Yale University.
NR 74
TC 2
Z9 2
U1 0
U2 3
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD SEP
PY 2013
VL 434
IS 2
BP 1443
EP 1459
DI 10.1093/mnras/stt1100
PG 17
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 207XO
UT WOS:000323638200039
ER
PT J
AU Wei, H
House, S
Wu, JJX
Zhang, J
Wang, ZD
He, Y
Gao, EJ
Gao, YG
Robinson, H
Li, W
Zuo, JM
Robertson, IM
Lu, Y
AF Wei, Hui
House, Stephen
Wu, Jiangjiexing
Zhang, Jiong
Wang, Zidong
He, Ying
Gao, Elizabeth J.
Gao, Yigui
Robinson, Howard
Li, Wei
Zuo, Jianmin
Robertson, Ian M.
Lu, Yi
TI Enhanced and tunable fluorescent quantum dots within a single crystal of
protein
SO NANO RESEARCH
LA English
DT Article
DE functional bio-nanomaterials; quantum dots; protein single crystals;
X-ray crystallography; tomography
ID UP-CONVERSION NANOPARTICLES; GOLD NANOPARTICLES; DIRECTED SYNTHESIS;
SEMICONDUCTOR CRYSTALLITES; LYSOZYME CRYSTALS; CANCER-CELLS; ION;
CLUSTERS; NANOSTRUCTURES; NANOMATERIALS
AB The design and synthesis of bio-nano hybrid materials can not only provide new materials with novel properties, but also advance our fundamental understanding of interactions between biomolecules and their abiotic counterparts. Here, we report a new approach to achieving such a goal by growing CdS quantum dots (QDs) within single crystals of lysozyme protein. This bio-nano hybrid emitted much stronger red fluorescence than its counterpart without the crystal, and such fluorescence properties could be either enhanced or suppressed by the addition of Ag(I) or Hg(II), respectively. The three-dimensional incorporation of CdS QDs within the lysozyme crystals was revealed by scanning transmission electron microscopy with electron tomography. More importantly, since our approach did not disrupt the crystalline nature of the lysozyme crystals, the metal and protein interactions were able to be studied by X-ray crystallography, thus providing insight into the role of Cd(II) in the CdS QDs formation.
C1 [Wei, Hui; Wu, Jiangjiexing; Gao, Elizabeth J.; Lu, Yi] Univ Illinois, Dept Chem, Urbana, IL 61801 USA.
[House, Stephen; Zhang, Jiong; Wang, Zidong; He, Ying; Zuo, Jianmin; Robertson, Ian M.; Lu, Yi] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA.
[Wu, Jiangjiexing; Li, Wei] Tianjin Univ, Key Lab Green Chem Technol MOE, Tianjin 300072, Peoples R China.
[Gao, Yigui] Univ Illinois, George L Clark Xray Facil, Urbana, IL 61801 USA.
[Gao, Yigui] Univ Illinois, Mat Lab 3M, Urbana, IL 61801 USA.
[Robinson, Howard] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Zuo, JM (reprint author), Univ Illinois, Dept Mat Sci & Engn, 1304 W Green St, Urbana, IL 61801 USA.
EM jianzuo@illinois.edu; ianr@illinois.edu; yi-lu@illinois.edu
RI Wei, Hui/E-6799-2011; Lu, Yi/B-5461-2010;
OI Wei, Hui/0000-0003-0870-7142; Lu, Yi/0000-0003-1221-6709; House,
Stephen/0000-0003-2035-6373
FU US National Science Foundation [CMMI 0749028, DMR-0117792]; US
Department of Energy [DE-FC36-05GO15064]; Office of Biological and
Environmental Research of the US Department of Energy; Office of Basic
Energy Sciences of the US Department of Energy; National Center for
Research Resources of the National Institutes of Health [P41RR012408];
National Institute of General Medical Sciences of the National
Institutes of Health [P41GM103473]
FX This work was supported by the US National Science Foundation (Nos. CMMI
0749028 and DMR-0117792). The authors thank C. Lei and W. Swiech for
help with the STEM imaging, C. M. Bee and D. Zhang for fluorescence
microscopic measurements, S. M. Nie for the use of Nuance system and A.
M. Smith for insightful discussions. S. H. and I. M. R. acknowledge
support from the US Department of Energy (grant No. DE-FC36-05GO15064).
STEM experiments were carried out in part in the Frederick Seitz
Materials Research Laboratory Central Facilities, University of
Illinois. X-ray crystallographic data for this study were measured at
beamline X12C of the National Synchrotron Light Source, Brookhaven
National Laboratory. Financial support comes principally from the
Offices of Biological and Environmental Research and of Basic Energy
Sciences of the US Department of Energy, and from the National Center
for Research Resources (No. P41RR012408) and the National Institute of
General Medical Sciences (No. P41GM103473) of the National Institutes of
Health.
NR 75
TC 10
Z9 10
U1 5
U2 102
PU TSINGHUA UNIV PRESS
PI BEIJING
PA TSINGHUA UNIV, RM A703, XUEYAN BLDG, BEIJING, 10084, PEOPLES R CHINA
SN 1998-0124
J9 NANO RES
JI Nano Res.
PD SEP
PY 2013
VL 6
IS 9
BP 627
EP 634
DI 10.1007/s12274-013-0348-0
PG 8
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary; Physics, Applied
SC Chemistry; Science & Technology - Other Topics; Materials Science;
Physics
GA 214NU
UT WOS:000324141400001
ER
PT J
AU Langille, MGI
Zaneveld, J
Caporaso, JG
McDonald, D
Knights, D
Reyes, JA
Clemente, JC
Burkepile, DE
Thurber, RLV
Knight, R
Beiko, RG
Huttenhower, C
AF Langille, Morgan G. I.
Zaneveld, Jesse
Caporaso, J. Gregory
McDonald, Daniel
Knights, Dan
Reyes, Joshua A.
Clemente, Jose C.
Burkepile, Deron E.
Thurber, Rebecca L. Vega
Knight, Rob
Beiko, Robert G.
Huttenhower, Curtis
TI Predictive functional profiling of microbial communities using 16S rRNA
marker gene sequences
SO NATURE BIOTECHNOLOGY
LA English
DT Article
ID PROTEIN FAMILIES; GUT MICROBIOME; GLOBAL-NETWORK; EVOLUTION; GENOME;
METAGENOMICS; BACTERIA; DATABASE; GREENGENES; PHYLOGENY
AB Profiling phylogenetic marker genes, such as the 16S rRNA gene, is a key tool for studies of microbial communities but does not provide direct evidence of a community's functional capabilities. Here we describe PICRUSt (phylogenetic investigation of communities by reconstruction of unobserved states), a computational approach to predict the functional composition of a metagenome using marker gene data and a database of reference genomes. PICRUSt uses an extended ancestral-state reconstruction algorithm to predict which gene families are present and then combines gene families to estimate the composite metagenome. Using 16S information, PICRUSt recaptures key findings from the Human Microbiome Project and accurately predicts the abundance of gene families in host-associated and environmental communities, with quantifiable uncertainty. Our results demonstrate that phylogeny and function are sufficiently linked that this 'predictive metagenomic' approach should provide useful insights into the thousands of uncultivated microbial communities for which only marker gene surveys are currently available.
C1 [Langille, Morgan G. I.; Beiko, Robert G.] Dalhousie Univ, Fac Comp Sci, Halifax, NS, Canada.
[Zaneveld, Jesse; Thurber, Rebecca L. Vega] Oregon State Univ, Dept Microbiol, Corvallis, OR 97331 USA.
[Caporaso, J. Gregory] No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA.
[Caporaso, J. Gregory] Argonne Natl Lab, Inst Genom & Syst Biol, Lemont, IL USA.
[McDonald, Daniel] Univ Colorado, BioFrontiers Inst, Boulder, CO 80309 USA.
[McDonald, Daniel] Univ Colorado, Dept Comp Sci, Boulder, CO 80309 USA.
[Knights, Dan] Univ Minnesota, Dept Comp Sci & Engn, Minneapolis, MN USA.
[Knights, Dan] Univ Minnesota, Inst Biotechnol, St Paul, MN 55108 USA.
[Reyes, Joshua A.; Huttenhower, Curtis] Harvard Univ, Sch Publ Hlth, Dept Biostat, Boston, MA 02115 USA.
[Clemente, Jose C.; Knight, Rob] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA.
[Burkepile, Deron E.] Florida Int Univ, Dept Biol Sci, Miami Beach, FL USA.
[Knight, Rob] Univ Colorado, Howard Hughes Med Inst, Boulder, CO 80309 USA.
[Huttenhower, Curtis] Broad Inst MIT & Harvard, Cambridge, MA USA.
RP Huttenhower, C (reprint author), Harvard Univ, Sch Publ Hlth, Dept Biostat, Boston, MA 02115 USA.
EM chuttenh@hsph.harvard.edu
RI Knight, Rob/D-1299-2010;
OI Langille, Morgan/0000-0002-6604-3009; Huttenhower,
Curtis/0000-0002-1110-0096
FU Canadian Institutes of Health Research; Canada Research Chairs program;
US National Science Foundation (NSF) [1130786]; Howard Hughes Medical
Institute; US National Institutes of Health (NIH) [P01DK078669,
U01HG004866, R01HG004872]; Crohn's and Colitis Foundation of America;
Sloan Foundation; NSF [CAREER DBI1053486]; ARO [W911NF-11-1-0473]; [NIH
1R01HG005969]
FX We would like to thank A. Robbins-Pianka and N. Segata, along with all
members of the Knight, Beiko, Vega Thurber, Caporaso and Huttenhower
laboratories, for their assistance during PICRUSt conception and
development. This work was supported in part by the Canadian Institutes
of Health Research (M. G. I. L., R. G. B.), the Canada Research Chairs
program (R. G. B.), US National Science Foundation (NSF) OCE #1130786
(R. V. T., D. B.), the Howard Hughes Medical Institute (R. K.), US
National Institutes of Health (NIH) P01DK078669, U01HG004866,
R01HG004872 (R. K.), the Crohn's and Colitis Foundation of America (R.
K.), the Sloan Foundation (R. K.), NIH 1R01HG005969 (C. H.), NSF CAREER
DBI1053486 (C. H.) and ARO W911NF-11-1-0473 (C.H.).
NR 49
TC 625
Z9 632
U1 63
U2 387
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1087-0156
J9 NAT BIOTECHNOL
JI Nat. Biotechnol.
PD SEP
PY 2013
VL 31
IS 9
BP 814
EP +
DI 10.1038/nbt.2676
PG 10
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 216TC
UT WOS:000324306300021
PM 23975157
ER
PT J
AU Pattanayak, V
Lin, S
Guilinger, JP
Ma, EB
Doudna, JA
Liu, DR
AF Pattanayak, Vikram
Lin, Steven
Guilinger, John P.
Ma, Enbo
Doudna, Jennifer A.
Liu, David R.
TI High-throughput profiling of off-target DNA cleavage reveals
RNA-programmed Cas9 nuclease specificity
SO NATURE BIOTECHNOLOGY
LA English
DT Article
ID ZINC-FINGER NUCLEASES; GENE DISRUPTION; CRISPR; SYSTEMS; CELLS;
ENDONUCLEASE; SEQUENCE; IMMUNITY; TALENS
AB The RNA-programmable Cas9 endonuclease cleaves double-stranded DNA at sites complementary to a 20-base-pair guide RNA. The Cas9 system has been used to modify genomes in multiple cells and organisms, demonstrating its potential as a facile genome-engineering tool. We used in vitro selection and high-throughput sequencing to determine the propensity of eight guide-RNA:Cas9 complexes to cleave each of 10(12) potential off-target DNA sequences. The selection results predicted five off-target sites in the human genome that were confirmed to undergo genome cleavage in HEK293T cells upon expression of one of two guide-RNA:Cas9 complexes. In contrast to previous models, our results show that guide-RNA:Cas9 specificity extends past a 7- to 12-base-pair seed sequence. Our results also suggest a tradeoff between activity and specificity both in vitro and in cells as a shorter, less-active guide RNA is more specific than a longer, more-active guide RNA. High concentrations of guide-RNA:Cas9 complexes can cleave off-target sites containing mutations near or within the PAM that are not cleaved when enzyme concentrations are limiting.
C1 [Pattanayak, Vikram; Guilinger, John P.; Liu, David R.] Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA.
[Pattanayak, Vikram; Guilinger, John P.; Liu, David R.] Harvard Univ, Howard Hughes Med Inst, Cambridge, MA 02138 USA.
[Lin, Steven; Ma, Enbo; Doudna, Jennifer A.] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
[Lin, Steven; Ma, Enbo; Doudna, Jennifer A.] Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
[Doudna, Jennifer A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
[Doudna, Jennifer A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Doudna, JA (reprint author), Univ Calif Berkeley, Dept Mol & Cell Biol, 229 Stanley Hall, Berkeley, CA 94720 USA.
EM doudna@berkeley.edu; drliu@fas.harvard.edu
FU DARPA [HR0011-11-2-0003, N66001-12-C-4207]; Howard Hughes Medical
Institute; National Institute of General Medical Sciences [T32GM007753];
Howard Hughes Medical Institute (HHMI); US National Institutes of Health
[R01GM073794-05]; HHMI
FX V.P., J.P.G. and D.R.L. were supported by DARPA HR0011-11-2-0003, DARPA
N66001-12-C-4207, and the Howard Hughes Medical Institute. V.P. was
supported by award no. T32GM007753 from the National Institute of
General Medical Sciences. S.L. and J.A.D. were supported by the Howard
Hughes Medical Institute (HHMI); E. M. was supported by US National
Institutes of Health grant R01GM073794-05 to J.A.D.; J.A.D. and D.R.L.
are HHMI Investigators.
NR 21
TC 402
Z9 431
U1 31
U2 172
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1087-0156
J9 NAT BIOTECHNOL
JI Nat. Biotechnol.
PD SEP
PY 2013
VL 31
IS 9
BP 839
EP +
DI 10.1038/nbt.2673
PG 7
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 216TC
UT WOS:000324306300025
PM 23934178
ER
PT J
AU Jones, AM
Yu, HY
Ghimire, NJ
Wu, SF
Aivazian, G
Ross, JS
Zhao, B
Yan, JQ
Mandrus, DG
Xiao, D
Yao, W
Xu, XD
AF Jones, Aaron M.
Yu, Hongyi
Ghimire, Nirmal J.
Wu, Sanfeng
Aivazian, Grant
Ross, Jason S.
Zhao, Bo
Yan, Jiaqiang
Mandrus, David G.
Xiao, Di
Yao, Wang
Xu, Xiaodong
TI Optical generation of excitonic valley coherence in monolayer WSe2
SO NATURE NANOTECHNOLOGY
LA English
DT Article
ID ELECTRONIC-STRUCTURE; CHARGED EXCITONS; QUANTUM-WELLS; MOS2;
POLARIZATION; SEMICONDUCTOR; DOTS
AB As a consequence of degeneracies arising from crystal symmetries, it is possible for electron states at band-edges ('valleys') to have additional spin-like quantum numbers(1-6). An important question is whether coherent manipulation can be performed on such valley pseudospins, analogous to that implemented using true spin, in the quest for quantum technologies(7,8). Here, we show that valley coherence can be generated and detected. Because excitons in a single valley emit circularly polarized photons, linear polarization can only be generated through recombination of an exciton in a coherent superposition of the two valley states. Using monolayer semiconductor WSe2 devices, we first establish the circularly polarized optical selection rules for addressing individual valley excitons and trions. We then demonstrate coherence between valley excitons through the observation of linearly polarized luminescence, whose orientation coincides with that of the linearly polarized excitation, for any given polarization angle. In contrast, the corresponding photoluminescence from trions is not observed to be linearly polarized, consistent with the expectation that the emitted photon polarization is entangled with valley pseudospin. The ability to address coherence(9,10), in addition to valley polarization(11-15), is a step forward towards achieving quantum manipulation of the valley index necessary for coherent valleytronics.
C1 [Jones, Aaron M.; Wu, Sanfeng; Aivazian, Grant; Zhao, Bo; Xu, Xiaodong] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Yu, Hongyi; Yao, Wang] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China.
[Yu, Hongyi; Yao, Wang] Univ Hong Kong, Ctr Theoret & Computat Phys, Hong Kong, Hong Kong, Peoples R China.
[Ghimire, Nirmal J.; Mandrus, David G.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
[Ghimire, Nirmal J.; Yan, Jiaqiang; Mandrus, David G.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Ross, Jason S.; Xu, Xiaodong] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA.
[Yan, Jiaqiang; Mandrus, David G.] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
[Xiao, Di] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA.
RP Yao, W (reprint author), Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China.
EM wangyao@hku.hk; xuxd@uw.edu
RI Xiao, Di/B-1830-2008; Yao, Wang/C-1353-2008; Mandrus, David/H-3090-2014;
Wu, Sanfeng/L-1323-2016;
OI Xiao, Di/0000-0003-0165-6848; Yao, Wang/0000-0003-2883-4528; Wu,
Sanfeng/0000-0002-6227-6286; Jones, Aaron/0000-0002-8326-1294
FU National Science Foundation (NSF) [DMR-1150719]; Defense Advanced
Research Projects Agency (DARPA) [N66001-11-1-4124]; Research Grant
Council [HKU705513P]; University Grant Council of the government of Hong
Kong [AoE/P-04/08]; Croucher Foundation; US Department of Energy (DoE),
Basic Energy Sciences (BES), Materials Sciences and Engineering Division
FX The authors thank B. Spivak, D. Cobden, A. Andreev and K-M. Fu for
helpful discussions. This work was mainly supported by the National
Science Foundation (NSF, DMR-1150719). The experimental set-up and
device fabrication was partially supported by a Defense Advanced
Research Projects Agency (DARPA) Young Faculty Award (YFA)
(N66001-11-1-4124). H.Y. and W.Y. were supported by the Research Grant
Council (HKU705513P) and the University Grant Council (AoE/P-04/08) of
the government of Hong Kong, and the Croucher Foundation under the
Croucher Innovation Award. N.G., J.Y., D. M. and D. X. were supported by
the US Department of Energy (DoE), Basic Energy Sciences (BES),
Materials Sciences and Engineering Division. Device fabrication was
performed at the University of Washington Microfabrication Facility and
the NSF-funded Nanotech User Facility.
NR 33
TC 345
Z9 345
U1 53
U2 424
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1748-3387
J9 NAT NANOTECHNOL
JI Nat. Nanotechnol.
PD SEP
PY 2013
VL 8
IS 9
BP 634
EP 638
DI 10.1038/NNANO.2013.151
PG 5
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 214XT
UT WOS:000324172800010
PM 23934096
ER
PT J
AU Laocharoensuk, R
Palaniappan, K
Smith, NA
Dickerson, RM
Werder, DJ
Baldwin, JK
Hollingsworth, JA
AF Laocharoensuk, Rawiwan
Palaniappan, Kumaranand
Smith, Nickolaus A.
Dickerson, Robert M.
Werder, Donald J.
Baldwin, Jon K.
Hollingsworth, Jennifer A.
TI Flow-based solution-liquid-solid nanowire synthesis
SO NATURE NANOTECHNOLOGY
LA English
DT Article
ID SEMICONDUCTOR NANOWIRES; CDSE NANOWIRES; QUANTUM WIRES; MICROFLUIDIC
REACTORS; SILICON NANOWIRES; SLS GROWTH; HETEROSTRUCTURES; NANOCRYSTALS;
SUBSTRATE; ZNSE
AB Discovered almost two decades ago, the solution-liquid-solid (SLS) method for semiconductor nanowire synthesis has proven to be an important route to high-quality, single-crystalline anisotropic nanomaterials. In execution, the SLS technique is similar to colloidal quantum-dot synthesis in that it entails the injection of chemical precursors into a hot surfactant solution, but mechanistically it is considered the solution-phase analogue to vapour-liquid-solid (VLS) growth. Both SLS and VLS methods make use of molten metal nanoparticles to catalyse the nucleation and elongation of single-crystalline nanowires. Significantly, however, the methods differ in how chemical precursors are introduced to the metal catalysts. In SLS, precursors are added in a one-off fashion in a flask, whereas in VLS they are carried by a flow of gas through the reaction chamber, and by-products are removed similarly. The ability to dynamically control the introduction of reactants and removal of by-products in VLS synthesis has enabled a degree of synthetic control not possible with SLS growth. We show here that SLS synthesis can be transformed into a continuous technique using a microfluidic reactor. The resulting flow-based SLS ('flow-SLS') platform allows us to slow down the synthesis of nanowires and capture mechanistic details concerning their growth in the solution phase, as well as synthesize technologically relevant axially heterostructured semiconductor nanowires, while maintaining the propensity of SLS for accessing ultrasmall diameters below 10 nm.
C1 [Laocharoensuk, Rawiwan; Palaniappan, Kumaranand; Smith, Nickolaus A.; Baldwin, Jon K.; Hollingsworth, Jennifer A.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA.
[Dickerson, Robert M.] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA.
[Werder, Donald J.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
RP Hollingsworth, JA (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Mat Phys & Applicat Div, POB 1663, Los Alamos, NM 87545 USA.
EM jenn@lanl.gov
RI Dennis, Allison/A-7654-2014
FU Los Alamos National Laboratory (LANL) Laboratory Directed Research and
Development (LDRD); National Science and Technology Development Agency
of Thailand (NSTDA); LANL Center for Integrated Nanotechnologies (CINT);
LANL LDRD programme; LANL CINT; National Nuclear Security Administration
of the US DOE [DE-AC52-06NA25396]
FX R.L. was supported by a Los Alamos National Laboratory (LANL) Laboratory
Directed Research and Development (LDRD) Program's Director's
Postdoctoral Research Fellowship. R. L. is currently supported by the
National Science and Technology Development Agency of Thailand (NSTDA),
through which some of the data analysis was completed. K. P. was
supported in part by LANL Center for Integrated Nanotechnologies (CINT)
postdoctoral funding. N.A.S., R. M. D., D.J.W. and J.A.H. acknowledge
support from the LANL LDRD programme. J.K.B. was funded by LANL CINT.
This work was performed in large part at CINT, a US Department of Energy
(DOE) Office of Science Nanoscale Science Research Center and User
Facility. LANL, an affirmative action equal opportunity employer, is
operated by Los Alamos National Security, LLC, for the National Nuclear
Security Administration of the US DOE under contract DE-AC52-06NA25396.
NR 43
TC 30
Z9 30
U1 14
U2 156
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1748-3387
J9 NAT NANOTECHNOL
JI Nat. Nanotechnol.
PD SEP
PY 2013
VL 8
IS 9
BP 660
EP 666
DI 10.1038/NNANO.2013.149
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 214XT
UT WOS:000324172800015
PM 23955811
ER
PT J
AU Onses, MS
Song, C
Williamson, L
Sutanto, E
Ferreira, PM
Alleyne, AG
Nealey, PF
Ahn, H
Rogers, JA
AF Onses, M. Serdar
Song, Chiho
Williamson, Lance
Sutanto, Erick
Ferreira, Placid M.
Alleyne, Andrew G.
Nealey, Paul F.
Ahn, Heejoon
Rogers, John A.
TI Hierarchical patterns of three-dimensional block-copolymer films formed
by electrohydrodynamic jet printing and self-assembly
SO NATURE NANOTECHNOLOGY
LA English
DT Article
ID THIN-FILMS; DIBLOCK COPOLYMERS; NANOSCALE PATTERNS; TEMPLATES; BLENDS;
ARRAYS; NANOLITHOGRAPHY; NANOSTRUCTURES; GRAPHOEPITAXY; LITHOGRAPHY
AB Self-assembly of block-copolymers provides a route to the fabrication of small (size, <50 nm) and dense (pitch, <100 nm) features with an accuracy that approaches even the demanding specifications for nanomanufacturing set by the semiconductor industry. A key requirement for practical applications, however, is a rapid, high-resolution method for patterning block-copolymers with different molecular weights and compositions across a wafer surface, with complex geometries and diverse feature sizes. Here we demonstrate that an ultrahigh-resolution jet printing technique that exploits electrohydrodynamic effects can pattern large areas with block-copolymers based on poly(styrene-block-methyl methacrylate) with various molecular weights and compositions. The printed geometries have diameters and linewidths in the sub-500 nm range, line edge roughness as small as similar to 45 nm, and thickness uniformity and repeatability that can approach molecular length scales (similar to 2 nm). Upon thermal annealing on bare, or chemically or topographically structured substrates, such printed patterns yield nanodomains of block-copolymers with well-defined sizes, periodicities and morphologies, in overall layouts that span dimensions from the scale of nanometres (with sizes continuously tunable between 13 nm and 20 nm) to centimetres. As well as its engineering relevance, this methodology enables systematic studies of unusual behaviours of block-copolymers in geometrically confined films.
C1 [Onses, M. Serdar; Song, Chiho; Ahn, Heejoon; Rogers, John A.] Univ Illinois, Dept Mat Sci & Engn, Beckman Inst, Urbana, IL 61801 USA.
[Onses, M. Serdar; Song, Chiho; Ahn, Heejoon; Rogers, John A.] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA.
[Sutanto, Erick; Ferreira, Placid M.; Alleyne, Andrew G.; Rogers, John A.] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Williamson, Lance; Nealey, Paul F.] Univ Chicago, Inst Mol Engn, Chicago, IL 60637 USA.
[Williamson, Lance; Nealey, Paul F.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Song, Chiho; Ahn, Heejoon] Hanyang Univ, Dept Organ & Nano Engn, Seoul 133791, South Korea.
[Song, Chiho; Ahn, Heejoon] Hanyang Univ, Inst Nano Sci & Technol, Seoul 133791, South Korea.
RP Rogers, JA (reprint author), Univ Illinois, Dept Mat Sci & Engn, Beckman Inst, Urbana, IL 61801 USA.
EM ahn@hanyang.ac.kr; jrogers@illinois.edu
RI ferreira, placid/D-5308-2012; Alleyne, Andrew/C-3127-2015; Ahn,
Heejoon/K-4603-2015; Rogers, John /L-2798-2016
OI ferreira, placid/0000-0002-5517-6586; Alleyne,
Andrew/0000-0002-1347-9669; Ahn, Heejoon/0000-0002-3322-6423;
FU Center for Nanoscale Chemical Electrical Mechanical Manufacturing
Systems at the University of Illinois; National Science Foundation
[CMMI-0749028]; National Research Foundation of Korea; Ministry of
Education, Science and Technology [2012R1A6A1029029]
FX This work was supported by the Center for Nanoscale Chemical Electrical
Mechanical Manufacturing Systems at the University of Illinois (funded
by the National Science Foundation under grant CMMI-0749028). The
authors acknowledge R. Gronheid and P. Rincon Delgadillo for providing
the chemically patterned substrates. C. S. and H. A. were partially
supported by the Basic Science Research Program through the National
Research Foundation of Korea funded by the Ministry of Education,
Science and Technology (2012R1A6A1029029). The authors thank S. Maclaren
and K. Chow for support with AFM and electron-beam lithography,
respectively. AFM and SEM studies were carried out in the Frederick
Seitz Materials Research Laboratory Central Facilities, University of
Illinois.
NR 38
TC 54
Z9 55
U1 19
U2 171
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1748-3387
J9 NAT NANOTECHNOL
JI Nat. Nanotechnol.
PD SEP
PY 2013
VL 8
IS 9
BP 667
EP 675
DI 10.1038/NNANO.2013.160
PG 9
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 214XT
UT WOS:000324172800016
PM 23975188
ER
PT J
AU Burgos, JMM
Burrell, KH
Solomon, WM
Grierson, BA
Loch, SD
Ballance, CP
Chrystal, C
AF Burgos, J. M. Munoz
Burrell, K. H.
Solomon, W. M.
Grierson, B. A.
Loch, S. D.
Ballance, C. P.
Chrystal, C.
TI Kinetic theory and atomic physics corrections for determination of ion
velocities from charge-exchange spectroscopy
SO NUCLEAR FUSION
LA English
DT Article
ID POLOIDAL ROTATION; HYDROGENIC IONS; FUSION PLASMAS; R-MATRIX;
POPULATIONS; STATES
AB Charge-exchange spectroscopy is a powerful diagnostic tool for determining ion temperatures, densities and rotational velocities in tokamak plasmas. This technique depends on detailed understanding of the atomic physics processes that affect the measured apparent velocities with respect to the true ion rotational velocities. These atomic effects are mainly due to energy dependence of the charge-exchange cross-sections, and in the case of poloidal velocities, due to gyro-motion of the ion during the finite lifetime of the excited states. Accurate lifetimes are necessary for correct interpretation of measured poloidal velocities, specially for high density plasma regimes on machines such as ITER, where l-mixing effects must be taken into account. In this work, a full nl-resolved atomic collisional radiative model coupled with a full kinetic calculation that includes the effects of electric and magnetic fields on the ion gyro-motion is presented for the first time. The model directly calculates from atomic physics first principles the excited state lifetimes that are necessary to evaluate the gyro-orbit effects. It is shown that even for low density plasmas where l-mixing effects are unimportant and coronal conditions can be assumed, the nl-resolved model is necessary for an accurate description of the gyro-motion effects to determine poloidal velocities. This solution shows good agreement when compared to three QH-mode shots on DIII-D, which contain a wide range of toroidal velocities and high ion temperatures where greater atomic corrections are needed. The velocities obtained from the model are compared to experimental velocities determined from co- and counter-injection of neutral beams on DIII-D.
C1 [Burgos, J. M. Munoz] Oak Ridge Inst Sci Educ, Oak Ridge, TN 37830 USA.
[Burrell, K. H.] Gen Atom Co, San Diego, CA 92186 USA.
[Solomon, W. M.; Grierson, B. A.] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Loch, S. D.; Ballance, C. P.] Auburn Univ, Dept Phys, Auburn, AL 36849 USA.
[Chrystal, C.] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA.
RP Burgos, JMM (reprint author), Oak Ridge Inst Sci Educ, Oak Ridge, TN 37830 USA.
EM munozj@fusion.gat.com
OI Solomon, Wayne/0000-0002-0902-9876
FU US Department of Energy [DE-AC05-06OR23100, DE-FC02-04ER54698,
DE-ACO2-09CH11466, DE-AC05-00OR22725]; Auburn University; ADAS
consortium; DIII-D Team
FX This work was supported in part by the US Department of Energy under
DE-AC05-06OR23100, DE-FC02-04ER54698, DE-ACO2-09CH11466 and
DE-AC05-00OR22725. The authors wish to acknowledge the support of the
atomic physics group at Auburn University, the ADAS consortium and the
DIII-D Team.
NR 40
TC 1
Z9 1
U1 1
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
J9 NUCL FUSION
JI Nucl. Fusion
PD SEP
PY 2013
VL 53
IS 9
AR 093012
DI 10.1088/0029-5515/53/9/093012
PG 24
WC Physics, Fluids & Plasmas
SC Physics
GA 214TZ
UT WOS:000324160400014
ER
PT J
AU Degnan, JH
Amdahl, DJ
Domonkos, M
Lehr, FM
Grabowski, C
Robinson, PR
Ruden, EL
White, WM
Wurden, GA
Intrator, TP
Sears, J
Weber, T
Waganaar, WJ
Frese, MH
Frese, SD
Camacho, JF
Coffey, SK
Makhin, V
Roderick, NF
Gale, DG
Kostora, M
Lerma, A
McCullough, JL
Sommars, W
Kiuttu, GF
Bauer, B
Fuelling, SR
Siemon, RE
Lynn, AG
Turchi, PJ
AF Degnan, J. H.
Amdahl, D. J.
Domonkos, M.
Lehr, F. M.
Grabowski, C.
Robinson, P. R.
Ruden, E. L.
White, W. M.
Wurden, G. A.
Intrator, T. P.
Sears, J.
Weber, T.
Waganaar, W. J.
Frese, M. H.
Frese, S. D.
Camacho, J. F.
Coffey, S. K.
Makhin, V.
Roderick, N. F.
Gale, D. G.
Kostora, M.
Lerma, A.
McCullough, J. L.
Sommars, W.
Kiuttu, G. F.
Bauer, B.
Fuelling, S. R.
Siemon, R. E.
Lynn, A. G.
Turchi, P. J.
TI Recent magneto-inertial fusion experiments on the field reversed
configuration heating experiment
SO NUCLEAR FUSION
LA English
DT Article
ID TARGET FUSION; THETA-PINCH; PLASMA; COMPRESSION; LINER
AB Magneto-inertial fusion (MIF) approaches take advantage of an embedded magnetic field to improve plasma energy confinement by reducing thermal conduction relative to conventional inertial confinement fusion (ICF). MIF reduces required precision in the implosion and the convergence ratio. Since 2008 (Wurden et al 2008 IAEA 2008 Fusion Energy Conf. (Geneva, Switzerland, 13-18 October) IC/P4-13 LA-UR-08-0796) and since our prior refereed publication on this topic (Degnan et al 2008 IEEE Trans. Plasma Sci. 36 80), AFRL and LANL have developed further one version of MIF. We have (1) reliably formed, translated, and captured field reversed configurations (FRCs) in magnetic mirrors inside metal shells or liners in preparation for subsequent compression by liner implosion; (2) imploded a liner with interior magnetic mirror field, obtaining evidence for compression of a 1.36 T field to 540 T; (3) performed a full system experiment of FRC formation, translation, capture, and imploding liner compression operation; (4) identified by comparison of 2D-MHD simulation and experiments factors limiting the closed-field lifetime of FRCs to about half that required for good liner compression of FRCs to multi-keV, 10(19) ion cm(-3), high energy density plasma (HEDP) conditions; and (5) designed and prepared hardware to increase that closed-field FRC lifetime to the required amount. Those lifetime experiments are now underway, with the goal of at least doubling closed-field FRC lifetimes and performing FRC implosions to HEDP conditions this year. These experiments have obtained imaging evidence of FRC rotation, and of initial rotation control measures slowing and stopping such rotation. Important improvements in fidelity of simulation to experiment have been achieved, enabling improved guidance and understanding of experiment design and performance.
C1 [Degnan, J. H.; Amdahl, D. J.; Domonkos, M.; Lehr, F. M.; Grabowski, C.; Robinson, P. R.; Ruden, E. L.; White, W. M.] Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
[Wurden, G. A.; Intrator, T. P.; Sears, J.; Weber, T.; Waganaar, W. J.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Frese, M. H.; Frese, S. D.; Camacho, J. F.; Coffey, S. K.; Makhin, V.; Roderick, N. F.] NumerEx LLC, Albuquerque, NM 87106 USA.
[Gale, D. G.; Kostora, M.; Lerma, A.; McCullough, J. L.; Sommars, W.] SAIC, Albuquerque, NM 87113 USA.
[Kiuttu, G. F.] VariTech Serv, Albuquerque, NM 87112 USA.
[Bauer, B.; Fuelling, S. R.; Siemon, R. E.] Univ Nevada, Dept Phys, Reno, NV 89557 USA.
[Lynn, A. G.] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA.
[Turchi, P. J.] Los Alamos Sci Lab, Los Alamos, NM 87545 USA.
RP Degnan, JH (reprint author), Air Force Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA.
RI Wurden, Glen/A-1921-2017
OI Wurden, Glen/0000-0003-2991-1484
FU Department of Energy, Office of Fusion Energy Science
[IA-DE-AI02-04ER54764]
FX This work was supported by The Department of Energy, Office of Fusion
Energy Science, Grant IA-DE-AI02-04ER54764. The support and
encouragement of Dr Robert E. Peterkin, Jr, Chief Scientist of Air Force
Research Laboratory, Directed Energy Directorate is acknowledged and
appreciated.
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
J9 NUCL FUSION
JI Nucl. Fusion
PD SEP
PY 2013
VL 53
IS 9
AR UNSP 093003
DI 10.1088/0029-5515/53/9/093003
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 214TZ
UT WOS:000324160400005
ER
PT J
AU Diallo, A
Canik, J
Goerler, T
Ku, SH
Kramer, GJ
Osborne, T
Snyder, P
Smith, DR
Guttenfelder, W
Bell, RE
Boyle, DP
Chang, CS
LeBlanc, BP
Maingi, R
Podesta, M
Sabbagh, S
AF Diallo, A.
Canik, J.
Goeerler, T.
Ku, S. -H.
Kramer, G. J.
Osborne, T.
Snyder, P.
Smith, D. R.
Guttenfelder, W.
Bell, R. E.
Boyle, D. P.
Chang, C. -S.
LeBlanc, B. P.
Maingi, R.
Podesta, M.
Sabbagh, S.
TI Progress in characterization of the pedestal stability and turbulence
during the edge-localized-mode cycle on National Spherical Torus
Experiment
SO NUCLEAR FUSION
LA English
DT Article
ID TOKAMAK
AB Progress in characterizing the edge stability and properties of the microinstabilities responsible for enhanced transport in the pedestal region is reported. The stability of the pedestal is characterized in high performance discharges on National Spherical Torus Experiment. These high performance plasmas are found to be ideal kink-peeling and ideal infinite-n ballooning unstable prior to the onset of edge-localized modes (ELM). The spatial structure of turbulence present during an ELM cycle in the pedestal region indicates poloidal spatial scales k(theta)rho(pedi)(i) similar to 0.2 propagating in the ion diamagnetic drift direction at the pedestal top, and radial spatial scales k(r)rho(pedi)(i) similar to 0.7. These propagating spatial scales are found to be poloidally elongated and consistent with ion-scale microturbulence. Both global and local gyrokinetic simulations have been performed to identify the microturbulence structure. The local gyrokinetic analysis indicates the presence of a linearly unstable hybrid kinetic ballooning mode and trapped electron mode with spatial scale and propagation direction consistent with experimental observations. In the global gyrokinetic analysis, the nonlinearly saturated potential fluctuations show radial and poloidal correlation lengths in agreement with experimental density fluctuation correlation length measurements.
C1 [Diallo, A.; Ku, S. -H.; Kramer, G. J.; Guttenfelder, W.; Bell, R. E.; Boyle, D. P.; Chang, C. -S.; LeBlanc, B. P.; Maingi, R.; Podesta, M.] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08544 USA.
[Canik, J.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
[Goeerler, T.] Max Planck Inst Plasma Phys, Garching, Germany.
[Osborne, T.; Snyder, P.] Gen Atom, San Diego, CA USA.
[Smith, D. R.] Univ Wisconsin, Dept Engn Phys, Madison, WI USA.
[Sabbagh, S.] Columbia Univ, Dept Appl Phys, New York, NY 10027 USA.
RP Diallo, A (reprint author), Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08544 USA.
EM adiallo@pppl.gov
RI Ku, Seung-Hoe/D-2315-2009;
OI Ku, Seung-Hoe/0000-0002-9964-1208; Canik, John/0000-0001-6934-6681;
Boyle, Dennis/0000-0001-8091-8169; Gorler, Tobias/0000-0002-0851-6699
FU US Dept of Energy [DE-AC02-09CH11466, DE-AC05-00OR22725, DE-SC0001288,
DE-FG02-99ER54524]
FX A. D. acknowledges useful discussions with N. Crocker and the UCLA group
for providing the reflectometer data. We also thank the anonymous
referees for their constructive suggestions. This work is supported by
US Dept of Energy contracts DE-AC02-09CH11466, DE-AC05-00OR22725,
DE-SC0001288, and DE-FG02-99ER54524. A part of this work was carried out
using the HELIOS supercomputer system at IFERC-CSC, Aomori, Japan.
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
J9 NUCL FUSION
JI Nucl. Fusion
PD SEP
PY 2013
VL 53
IS 9
AR 093026
DI 10.1088/0029-5515/53/9/093026
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 214TZ
UT WOS:000324160400028
ER
PT J
AU Eich, T
Leonard, AW
Pitts, RA
Fundamenski, W
Goldston, RJ
Gray, TK
Herrmann, A
Kirk, A
Kallenbach, A
Kardaun, O
Kukushkin, AS
LaBombard, B
Maingi, R
Makowski, MA
Scarabosio, A
Sieglin, B
Terry, J
Thornton, A
AF Eich, T.
Leonard, A. W.
Pitts, R. A.
Fundamenski, W.
Goldston, R. J.
Gray, T. K.
Herrmann, A.
Kirk, A.
Kallenbach, A.
Kardaun, O.
Kukushkin, A. S.
LaBombard, B.
Maingi, R.
Makowski, M. A.
Scarabosio, A.
Sieglin, B.
Terry, J.
Thornton, A.
CA ASDEX Upgrade Team
JET EFDA Contributors
TI Scaling of the tokamak near the scrape-off layer H-mode power width and
implications for ITER
SO NUCLEAR FUSION
LA English
DT Article
ID ALCATOR C-MOD; HEAT-FLUX; JET; FLUCTUATIONS; TRANSPORT; ASDEX
AB Amulti-machine database for the H-mode scrape-off layer power fall-off length, lambda(q) in JET, DIII-D, ASDEX Upgrade, C-Mod, NSTX and MAST has been assembled under the auspices of the International Tokamak Physics Activity. Regression inside the database finds that the most important scaling parameter is the poloidal magnetic field (or equivalently the plasma current), with lambda(q) decreasing linearly with increasing B-pol. For the conventional aspect ratio tokamaks, the regression finds lambda(q) alpha B-tor(-0.8). q(95)(1.1).P-SOL(0.1).R-geo(0), yielding lambda(q,) (ITER) congruent to 1mm for the baseline inductive H-mode burning plasma scenario at I-p = 15 MA. The experimental divertor target heat flux profile data, from which lambda(q) is derived, also yield a divertor power spreading factor (S) which, together with lambda(q), allows an integral power decay length on the target to be estimated. There are no differences in the lambda(q) scaling obtained from all-metal or carbon dominated machines and the inclusion of spherical tokamaks has no significant influence on the regression parameters. Comparison of the measured lambda(q) with the values expected from a recently published heuristic drift based model shows satisfactory agreement for all tokamaks.
C1 [Eich, T.; Herrmann, A.; Kallenbach, A.; Kardaun, O.; Scarabosio, A.; Sieglin, B.] Max Planck Inst Plasma Phys, D-85748 Garching, Germany.
Culham Sci Ctr, JET EFDA, Abingdon OX14 3DB, Oxon, England.
[Leonard, A. W.] Gen Atom, San Diego, CA 92186 USA.
[Pitts, R. A.; Kukushkin, A. S.] ITER Org, F-13115 St Paul Les Durance, France.
[Fundamenski, W.; Kirk, A.; Thornton, A.] EURATOM, Culham Sci Ctr, CCFE, Abingdon, Oxon, England.
[Goldston, R. J.; Maingi, R.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
[Gray, T. K.; Maingi, R.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[LaBombard, B.; Terry, J.] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
[Makowski, M. A.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Eich, T (reprint author), Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany.
FU US DOE [DE-FC02-04ER54698, DE-AC02-09CH11466, DE-FC02-99ER54512,
DE-AC05-00OR22725, DE-AC52-07NA27344]; EURATOM
FX The views and opinions expressed herein do not necessarily reflect those
of the ITER Organization. This work was supported in part by the US DOE
under DE-FC02-04ER54698 (GA), DE-AC02-09CH11466 (PPPL),
DE-FC02-99ER54512 (MIT), DE-AC05-00OR22725 (ORNL), and DE-AC52-07NA27344
(LLNL). This work was supported by EURATOM and carried out within the
framework of the European Fusion Development Agreement (EFDA). The views
and opinions expressed herein do not necessarily reflect those of the
European Commission.
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
EI 1741-4326
J9 NUCL FUSION
JI Nucl. Fusion
PD SEP
PY 2013
VL 53
IS 9
AR 093031
DI 10.1088/0029-5515/53/9/093031
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 214TZ
UT WOS:000324160400033
ER
PT J
AU Evans, TE
Orlov, DM
Wingen, A
Wu, W
Loarte, A
Casper, TA
Schmitz, O
Saibene, G
Schaffer, MJ
Daly, E
AF Evans, T. E.
Orlov, D. M.
Wingen, A.
Wu, W.
Loarte, A.
Casper, T. A.
Schmitz, O.
Saibene, G.
Schaffer, M. J.
Daly, E.
TI 3D vacuum magnetic field modelling of the ITER ELM control coil during
standard operating scenarios
SO NUCLEAR FUSION
LA English
DT Article
ID TOKAMAK PLASMAS; EDGE; PERTURBATIONS; SUPPRESSION; STABILITY; PHYSICS
AB In-vessel, non-axisymmetric, control coils have proven to be an important option for mitigating and suppressing edg-elocalized modes (ELMs) in high performance operating regimes on a growing number of tokamaks. Additionally, an in-vessel non-axisymmetric ELM control coil is being considered in the ITER baseline design. In preparing for the initial operation of this coil set, a comprehensive study was carried out to characterize the linear superposition of the 3D vacuum magnetic field, produced by the ELM coil, on a series of equilibria representing nine standard ITER operating scenarios. Here, the spatial phase angle of toroidally distributed currents, specified with a cosine waveform, in the upper and lower rows of the ITER ELM coil (IEC) set is varied in 2 degrees. steps while holding the current in the equatorial row of coils constant. The peak current in each of the three toroidal rows of window-frame coils making up the IEC is scanned between 5 kAt and 90 kAt in 5 kAt steps and the width of the edge region covered by overlapping vacuum field magnetic islands is calculated. This width is compared to a vacuum field ELM suppression correlation criterion found in DIII-D. A minimum coil current satisfying the DIII-D criterion, along with an associated set of phase angles, is identified for each ITER operating scenario. These currents range from 20 kAt to 75 kAt depending on the operating scenario being used and the toroidal mode number (n) of the cosine waveform. Comparisons between the scaling of the divertor footprint area in cases with n = 3 perturbation fields versus those with n = 4 show significant advantages when using n = 3. In addition, it is found that the DIII-D correlation criterion can be satisfied in the event that various combinations of individual IEC window-frame coils need to be turned off due to malfunctioning components located inside the vacuum vessel. Details of these results for both the full set of 27 window-frame coils and various reduced sets, using either n = 3 and n = 4 perturbation fields, are discussed.
C1 [Evans, T. E.; Wu, W.; Schaffer, M. J.] Gen Atom, San Diego, CA 92186 USA.
[Orlov, D. M.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Wingen, A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Loarte, A.; Casper, T. A.; Daly, E.] ITER Org, F-13115 St Paul Les Durance, France.
[Schmitz, O.] Forschungszentrum Julich, IEF 4 Euratom Assoc, D-52425 Julich, Germany.
[Saibene, G.] Fus Energy Joint Undertaking, Barcelona, Spain.
RP Evans, TE (reprint author), Gen Atom, POB 85608, San Diego, CA 92186 USA.
EM evans@fusion.gat.com
RI Wingen, Andreas/K-8822-2013; Orlov, Dmitriy/D-2406-2016;
OI Orlov, Dmitriy/0000-0002-2230-457X; Wingen, Andreas/0000-0001-8855-1349
FU UT BATTELLE, LLC [4000095588]; US Department of Energy
[DE-FG02-05ER54809, DE-FG02-07ER54917, DE-AC05-00OR22725]; ITER
[C19TD42FU]
FX This work was supported by UT BATTELLE, LLC under 4000095588 and the US
Department of Energy under DE-FG02-05ER54809, DE-FG02-07ER54917,
DE-AC05-00OR22725 and ITER Task Agreement C19TD42FU. The views and
opinions expressed herein do not necessarily reflect those of the ITER
Organization.
NR 34
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
J9 NUCL FUSION
JI Nucl. Fusion
PD SEP
PY 2013
VL 53
IS 9
AR 093029
DI 10.1088/0029-5515/53/9/093029
PG 13
WC Physics, Fluids & Plasmas
SC Physics
GA 214TZ
UT WOS:000324160400031
ER
PT J
AU Groebner, RJ
Chang, CS
Hughes, JW
Maingi, R
Snyder, PB
Xu, XQ
Boedo, JA
Boyle, DP
Callen, JD
Canik, JM
Cziegler, I
Davis, EM
Diallo, A
Diamond, PH
Elder, JD
Eldon, DP
Ernst, DR
Fulton, DP
Landreman, M
Leonard, AW
Lore, JD
Osborne, TH
Pankin, AY
Parker, SE
Rhodes, TL
Smith, SP
Sontag, AC
Stacey, WM
Walk, J
Wan, W
Wang, EHJ
Watkins, JG
White, AE
Whyte, DG
Yan, Z
Belli, EA
Bray, BD
Candy, J
Churchill, RM
Deterly, TM
Doyle, EJ
Fenstermacher, ME
Ferraro, NM
Hubbard, AE
Joseph, I
Kinsey, JE
LaBombard, B
Lasnier, CJ
Lin, Z
Lipschultz, BL
Liu, C
Ma, Y
McKee, GR
Ponce, DM
Rost, JC
Schmitz, L
Staebler, GM
Sugiyama, LE
Terry, JL
Umansky, MV
Waltz, RE
Wolfe, SM
Zeng, L
Zweben, SJ
AF Groebner, R. J.
Chang, C. S.
Hughes, J. W.
Maingi, R.
Snyder, P. B.
Xu, X. Q.
Boedo, J. A.
Boyle, D. P.
Callen, J. D.
Canik, J. M.
Cziegler, I.
Davis, E. M.
Diallo, A.
Diamond, P. H.
Elder, J. D.
Eldon, D. P.
Ernst, D. R.
Fulton, D. P.
Landreman, M.
Leonard, A. W.
Lore, J. D.
Osborne, T. H.
Pankin, A. Y.
Parker, S. E.
Rhodes, T. L.
Smith, S. P.
Sontag, A. C.
Stacey, W. M.
Walk, J.
Wan, W.
Wang, E. H. -J.
Watkins, J. G.
White, A. E.
Whyte, D. G.
Yan, Z.
Belli, E. A.
Bray, B. D.
Candy, J.
Churchill, R. M.
Deterly, T. M.
Doyle, E. J.
Fenstermacher, M. E.
Ferraro, N. M.
Hubbard, A. E.
Joseph, I.
Kinsey, J. E.
LaBombard, B.
Lasnier, C. J.
Lin, Z.
Lipschultz, B. L.
Liu, C.
Ma, Y.
McKee, G. R.
Ponce, D. M.
Rost, J. C.
Schmitz, L.
Staebler, G. M.
Sugiyama, L. E.
Terry, J. L.
Umansky, M. V.
Waltz, R. E.
Wolfe, S. M.
Zeng, L.
Zweben, S. J.
TI Improved understanding of physics processes in pedestal structure,
leading to improved predictive capability for ITER
SO NUCLEAR FUSION
LA English
DT Article
ID ALCATOR C-MOD; BOOTSTRAP-CURRENT; ASPECT-RATIO; ARBITRARY
COLLISIONALITY; PLASMA-CONFINEMENT; TRANSPORT MODELS; TOKAMAK PLASMAS;
CHAPTER 2; DIII-D; TEMPERATURE
AB Joint experiment/theory/modelling research has led to increased confidence in predictions of the pedestal height in ITER. This work was performed as part of a US Department of Energy Joint Research Target in FY11 to identify physics processes that control the H-mode pedestal structure. The study included experiments on C-Mod, DIII-D and NSTX as well as interpretation of experimental data with theory-based modelling codes. This work provides increased confidence in the ability of models for peeling-ballooning stability, bootstrap current, pedestal width and pedestal height scaling to make correct predictions, with some areas needing further work also being identified. A model for pedestal pressure height has made good predictions in existing machines for a range in pressure of a factor of 20. This provides a solid basis for predicting the maximum pedestal pressure height in ITER, which is found to be an extrapolation of a factor of 3 beyond the existing data set. Models were studied for a number of processes that are proposed to play a role in the pedestal n(e) and T-e profiles. These processes include neoclassical transport, paleoclassical transport, electron temperature gradient turbulence and neutral fuelling. All of these processes may be important, with the importance being dependent on the plasma regime. Studies with several electromagnetic gyrokinetic codes show that the gradients in and on top of the pedestal can drive a number of instabilities.
C1 [Groebner, R. J.; Snyder, P. B.; Leonard, A. W.; Osborne, T. H.; Smith, S. P.; Belli, E. A.; Bray, B. D.; Candy, J.; Deterly, T. M.; Ferraro, N. M.; Kinsey, J. E.; Liu, C.; Ponce, D. M.; Staebler, G. M.; Waltz, R. E.] Gen Atom, San Diego, CA 92186 USA.
[Chang, C. S.; Maingi, R.; Boyle, D. P.; Diallo, A.; Zweben, S. J.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Hughes, J. W.; Davis, E. M.; Ernst, D. R.; Landreman, M.; Walk, J.; White, A. E.; Whyte, D. G.; Churchill, R. M.; Hubbard, A. E.; LaBombard, B.; Lipschultz, B. L.; Ma, Y.; Rost, J. C.; Sugiyama, L. E.; Terry, J. L.; Wolfe, S. M.] MIT, Cambridge, MA 02139 USA.
[Xu, X. Q.; Wang, E. H. -J.; Fenstermacher, M. E.; Joseph, I.; Lasnier, C. J.; Umansky, M. V.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Boedo, J. A.; Cziegler, I.; Diamond, P. H.; Eldon, D. P.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Callen, J. D.; Yan, Z.; McKee, G. R.] Univ Wisconsin, Coll Engn, Madison, WI 53706 USA.
[Canik, J. M.; Lore, J. D.; Sontag, A. C.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Elder, J. D.] Univ Toronto, Inst Aerosp Studies, Toronto, ON M3H 576, Canada.
[Fulton, D. P.; Lin, Z.] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92616 USA.
[Pankin, A. Y.] Tech X, Boulder, CO 80303 USA.
[Parker, S. E.; Wan, W.] Univ Colorado Boulder, Dept Phys, Boulder, CO 80309 USA.
[Rhodes, T. L.; Doyle, E. J.; Schmitz, L.; Zeng, L.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
[Rhodes, T. L.; Doyle, E. J.; Schmitz, L.; Zeng, L.] Univ Calif Los Angeles, PSTI, Los Angeles, CA 90095 USA.
[Stacey, W. M.] Georgia Inst Technol, Atlanta, GA 30332 USA.
[Watkins, J. G.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Groebner, RJ (reprint author), Gen Atom, POB 85608, San Diego, CA 92186 USA.
EM groebner@fusion.gat.com
RI Diallo, Ahmed/M-7792-2013; Lipschultz, Bruce/J-7726-2012; Ernst,
Darin/A-1487-2010; Landreman, Matt/C-7684-2017;
OI Boyle, Dennis/0000-0001-8091-8169; Lipschultz,
Bruce/0000-0001-5968-3684; Lore, Jeremy/0000-0002-9192-465X; Eldon,
David/0000-0003-1895-0648; Ernst, Darin/0000-0002-9577-2809; Landreman,
Matt/0000-0002-7233-577X; Canik, John/0000-0001-6934-6681
FU US Department of Energy [DE-FC02-04ER54698, DE-FG02-95ER54309,
DE-FG02-00ER54538, DE-AC52-07NA27344, DE-FC02-93ER54186,
DE-AC05-00OR22725, DE-AC02-09CH11466, DE-AC04-94AL85000,
DE-FG03-94ER54271, DE-FG02-08ER54984, DE-FG02-07ER54917,
DE-FC02-05ER54816, DE-FG02-89ER53296, DE-FG02-08ER54999]; Natural
Sciences and Engineering Research Council of Canada
FX This work was supported in part by the US Department of Energy under
DE-FC02-04ER54698, DE-FG02-95ER54309, DE-FG02-00ER54538,
DE-AC52-07NA27344, DE-FC02-93ER54186, DE-AC05-00OR22725,
DE-AC02-09CH11466, DE-AC04-94AL85000, DE-FG03-94ER54271,
DE-FG02-08ER54984, DE-FG02-07ER54917, DE-FC02-05ER54816,
DE-FG02-89ER53296, DE-FG02-08ER54999 and work performed at the
University of Toronto was funded by the Natural Sciences and Engineering
Research Council of Canada.
NR 85
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PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
J9 NUCL FUSION
JI Nucl. Fusion
PD SEP
PY 2013
VL 53
IS 9
AR 093024
DI 10.1088/0029-5515/53/9/093024
PG 19
WC Physics, Fluids & Plasmas
SC Physics
GA 214TZ
UT WOS:000324160400026
ER
PT J
AU Guttenfelder, W
Peterson, JL
Candy, J
Kaye, SM
Ren, Y
Bell, RE
Hammett, GW
LeBlanc, BP
Mikkelsen, DR
Nevins, WM
Yuh, H
AF Guttenfelder, W.
Peterson, J. L.
Candy, J.
Kaye, S. M.
Ren, Y.
Bell, R. E.
Hammett, G. W.
LeBlanc, B. P.
Mikkelsen, D. R.
Nevins, W. M.
Yuh, H.
TI Progress in simulating turbulent electron thermal transport in NSTX
SO NUCLEAR FUSION
LA English
DT Article
ID SPHERICAL TOKAMAK; TEARING INSTABILITIES; ANOMALOUS TRANSPORT;
KINETIC-THEORY; MODES; GRADIENT; MICROTURBULENCE; MICROSTABILITY;
CONFINEMENT; FACILITY
AB Nonlinear simulations based on multiple NSTX discharge scenarios have progressed to help differentiate unique instability mechanisms and to validate with experimental turbulence and transport data. First nonlinear gyrokinetic simulations of microtearing turbulence in a high-beta NSTX H-mode discharge predict experimental levels of electron thermal transport that are dominated by magnetic flutter and increase with collisionality, roughly consistent with energy confinement times in dimensionless collisionality scaling experiments. Electron temperature gradient (ETG) simulations predict significant electron thermal transport in some low-and high-beta discharges when ion scales are suppressed by E x B shear. Although the predicted transport in H-modes is insensitive to variation in collisionality (inconsistent with confinement scaling), it is sensitive to variations in other parameters, particularly density gradient stabilization. In reversed shear L-mode discharges that exhibit electron internal transport barriers, ETG transport has also been shown to be suppressed nonlinearly by strong negative magnetic shear, s << 0. In many high-beta plasmas, instabilities which exhibit a stiff beta dependence characteristic of kinetic ballooning modes (KBMs) are sometimes found in the core region. However, they do not have a distinct finite beta threshold, instead transitioning gradually to a trapped electron mode (TEM) as beta is reduced to zero. Nonlinear simulations of this 'hybrid' TEM/KBM predict significant transport in all channels, with substantial contributions from compressional magnetic perturbations. As multiple instabilities are often unstable simultaneously in the same plasma discharge, even on the same flux surface, unique parametric dependencies are discussed which may be useful for distinguishing the different mechanisms experimentally.
C1 [Guttenfelder, W.; Kaye, S. M.; Ren, Y.; Bell, R. E.; Hammett, G. W.; LeBlanc, B. P.; Mikkelsen, D. R.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Peterson, J. L.; Nevins, W. M.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Candy, J.] Gen Atom Co, San Diego, CA 92186 USA.
[Yuh, H.] Nova Photon Inc, Princeton, NJ 08540 USA.
RP Guttenfelder, W (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM wgutten@pppl.gov
RI Hammett, Gregory/D-1365-2011
OI Hammett, Gregory/0000-0003-1495-6647
FU US DOE [DE-AC02-05CH11231]; DOE [DE-AC05-00OR22725, DE-AC02-09CH11466,
DE-FG03-95ER54309, DE-AC52-07NA27344, DE-FG02-99ER54527]
FX We would like to thank J. Canik, S. Gerhardt and J. Menard for useful
discussions. This research used resources of the National Energy
Research Scientific Computing Center, supported by US DOE Contract
DE-AC02-05CH11231, and the Oak Ridge Leadership Computing Facility,
supported by DOE contract DE-AC05-00OR22725. This work was also
supported by DOE contracts DE-AC02-09CH11466, DE-FG03-95ER54309,
DE-AC52-07NA27344 and DE-FG02-99ER54527.
NR 95
TC 26
Z9 26
U1 4
U2 25
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
EI 1741-4326
J9 NUCL FUSION
JI Nucl. Fusion
PD SEP
PY 2013
VL 53
IS 9
AR 093022
DI 10.1088/0029-5515/53/9/093022
PG 13
WC Physics, Fluids & Plasmas
SC Physics
GA 214TZ
UT WOS:000324160400024
ER
PT J
AU Heidbrink, WW
Van Zeeland, MA
Austin, ME
Bass, EM
Ghantous, K
Gorelenkov, NN
Grierson, BA
Spong, DA
Tobias, BJ
AF Heidbrink, W. W.
Van Zeeland, M. A.
Austin, M. E.
Bass, E. M.
Ghantous, K.
Gorelenkov, N. N.
Grierson, B. A.
Spong, D. A.
Tobias, B. J.
TI The effect of the fast-ion profile on Alfven eigenmode stability
SO NUCLEAR FUSION
LA English
DT Article
ID DIII-D TOKAMAK; SPECTROSCOPY; DRIVEN; EXCITATION
AB Different combinations of on-axis and off-axis neutral beams are injected into DIII-D plasmas that are unstable to reversed shear Alfven eigenmodes (RSAE) and toroidal Alfven eigenmodes (TAE). The variations alter the classically expected fast-ion gradient. del beta(f) in the plasma interior. Off-axis injection reduces the amplitude of RSAE activity an order of magnitude. Core TAEs are also strongly stabilized. In contrast, at larger minor radius, the fast-ion gradient is similar for on-and off-axis injection and switching the angle of injection has a weaker effect on the stability of TAEs. The average mode amplitude correlates strongly with the classically expected profile but the measured profile relaxes to similar values independent of the fraction of off-axis beams. The observations agree qualitatively with a 'critical-gradient' model of fast-ion transport.
C1 [Heidbrink, W. W.] Univ Calif Irvine, Irvine, CA 92717 USA.
[Van Zeeland, M. A.] Gen Atom Co, San Diego, CA USA.
[Austin, M. E.] Univ Texas Austin, Austin, TX 78712 USA.
[Bass, E. M.] Univ Calif San Diego, San Diego, CA 92103 USA.
[Ghantous, K.; Gorelenkov, N. N.; Grierson, B. A.; Tobias, B. J.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Spong, D. A.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP Heidbrink, WW (reprint author), Univ Calif Irvine, Irvine, CA 92717 USA.
FU US Department of Energy [SC-G903402, DE-FC02-04ER54698,
DE-AC02-09CH11466, DE-AC05-0000R22725]
FX We thank the DIII-D team for their support. This work was funded by the
US Department of Energy under SC-G903402, DE-FC02-04ER54698,
DE-AC02-09CH11466 and DE-AC05-0000R22725.
NR 39
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U1 1
U2 16
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
J9 NUCL FUSION
JI Nucl. Fusion
PD SEP
PY 2013
VL 53
IS 9
AR 093006
DI 10.1088/0029-5515/53/9/093006
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 214TZ
UT WOS:000324160400008
ER
PT J
AU Kessel, CE
Wolfe, SM
Hutchinson, IH
Hughes, JW
Lin, Y
Ma, Y
Mikkelsen, DR
Poli, FM
Reinke, ML
Wukitch, SJ
AF Kessel, C. E.
Wolfe, S. M.
Hutchinson, I. H.
Hughes, J. W.
Lin, Y.
Ma, Y.
Mikkelsen, D. R.
Poli, F. M.
Reinke, M. L.
Wukitch, S. J.
CA C-Mod Team
TI Alcator C-Mod experiments in support of the ITER baseline 15 MA scenario
SO NUCLEAR FUSION
LA English
DT Article
ID PLASMA; CONSUMPTION; DENSITY; LIMITS; JET
AB Experiments on Alcator C-Mod from 2009-2012 have examined the rampup, flattop and rampdown phases of the proposed ITER 15 MA baseline scenario. Rampup studies show ICRF heating can significantly reduce the V-s requirement, and that an H-mode late in the ramp can reduce this further. ICRF modifications to l(i) in L-mode are minimal, although the T-e profile is peaked relative to ohmic in the plasma centre, and reduces the sawtooth onset times. Flattop plasmas targeting ITER baseline parameters have been sustained for 20 tau(E) or 8 - 13 tau(CR), but only reach H-98 similar to 0.6 at n/n(Gr) = 0.85, rising to 0.9 at n/n(Gr) = 0.65. Rampdown studies show H-modes can be routinely sustained with ICRF power injection, avoiding an OH coil over-current associated with the H-L transition. In addition, faster current rampdowns are preferred to avoid an over-current when an H-L transition ultimately does occur. In the H-mode rampdown the density is found to drop with I-p, preserving the n/n(Gr) ratio, so long as ICRF power is injected.
C1 [Kessel, C. E.; Mikkelsen, D. R.; Poli, F. M.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Wolfe, S. M.; Hutchinson, I. H.; Hughes, J. W.; Lin, Y.; Ma, Y.; Reinke, M. L.; Wukitch, S. J.] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
RP Kessel, CE (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM ckessel@pppl.gov
RI poli, francesca/C-2226-2008
OI poli, francesca/0000-0003-3959-4371
FU DOE [DE-FC0299ER54512, DE-AC02-09CH11466]
FX Work supported by DOE contracts DE-FC0299ER54512 and DE-AC02-09CH11466.
NR 15
TC 4
Z9 4
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
J9 NUCL FUSION
JI Nucl. Fusion
PD SEP
PY 2013
VL 53
IS 9
AR 093021
DI 10.1088/0029-5515/53/9/093021
PG 12
WC Physics, Fluids & Plasmas
SC Physics
GA 214TZ
UT WOS:000324160400023
ER
PT J
AU Olynyk, GM
Granetz, RS
Reinke, ML
Whyte, DG
Golfinopoulos, T
Hughes, JW
Walk, JR
Izzo, VA
Combs, SK
Milora, SL
Brookman, MW
AF Olynyk, G. M.
Granetz, R. S.
Reinke, M. L.
Whyte, D. G.
Golfinopoulos, T.
Hughes, J. W.
Walk, J. R.
Izzo, V. A.
Combs, S. K.
Milora, S. L.
Brookman, M. W.
TI Rapid shutdown experiments with one and two gas jets on Alcator C-Mod
SO NUCLEAR FUSION
LA English
DT Article
ID DISRUPTION MITIGATION; DIII-D; ITER
AB Massive gas injection rapid shutdown experiments have been conducted on the Alcator C-Mod tokamak using two toroidally separated gas injectors, in order to investigate the effect of multiple gas injection locations on the toroidal asymmetry in the radiated power. Toroidal radiation asymmetry is diagnosed by an array of six single-channel photodiodes mounted on the vessel wall. The presence of magnetohydrodynamic (MHD) activity is diagnosed using an array of magnetic pickup (Mirnov) coils, mounted on stalks on the vessel wall. Scans were conducted of the relative timing between the two jets, of the 95th percentile safety factor, and of the plasma elongation. It is observed that firing the two gas jets so that the injected impurities arrive at the plasma at nearly the same time produced an increase in the toroidal radiation asymmetry. In addition, the radiation asymmetry in the thermal quench phase correlates with the growth rate of low toroidal mode number MHD modes, indicating that these mode(s) are playing a role in setting the radiation asymmetry.
C1 [Olynyk, G. M.; Granetz, R. S.; Reinke, M. L.; Whyte, D. G.; Golfinopoulos, T.; Hughes, J. W.; Walk, J. R.] MIT Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
[Izzo, V. A.] UCSD Ctr Energy Res, La Jolla, CA 92093 USA.
[Combs, S. K.; Milora, S. L.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Brookman, M. W.] Univ Texas Fus Res Ctr, Austin, TX 78712 USA.
RP Olynyk, GM (reprint author), MIT Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
EM golynyk@psfc.mit.edu
FU United States Department of Energy [DE-FC02-99ER54512]; Canada NSERC PGS
D program
FX The authors would like to thank the Alcator C-Mod team, including
especially the engineers and technical staff, without whom no
experiments could be carried out. Valuable discussions with A.N.
Tronchin-James are acknowledged. This work was supported by United
States Department of Energy Cooperative Agreement DE-FC02-99ER54512 and
the Canada NSERC PGS D program.
NR 16
TC 13
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U1 0
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
J9 NUCL FUSION
JI Nucl. Fusion
PD SEP
PY 2013
VL 53
IS 9
AR 092001
DI 10.1088/0029-5515/53/9/092001
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 214TZ
UT WOS:000324160400001
ER
PT J
AU Rice, JE
Podpaly, YA
Reinke, ML
Gao, C
Shiraiwa, S
Terry, JL
Theiler, C
Wallace, GM
Bonoli, PT
Brunner, D
Churchill, RM
Cziegler, I
Delgado-Aparicio, L
Diamond, PH
Faust, IC
Fisch, NJ
Granetz, RS
Greenwald, MJ
Hubbard, AE
Hughes, JW
Hutchinson, IH
Irby, JH
Lee, J
Lin, Y
Marmar, ES
Mumgaard, R
Parker, RR
Scott, SD
Walk, JR
Wolfe, SM
Wukitch, SJ
AF Rice, J. E.
Podpaly, Y. A.
Reinke, M. L.
Gao, C.
Shiraiwa, S.
Terry, J. L.
Theiler, C.
Wallace, G. M.
Bonoli, P. T.
Brunner, D.
Churchill, R. M.
Cziegler, I.
Delgado-Aparicio, L.
Diamond, P. H.
Faust, I. C.
Fisch, N. J.
Granetz, R. S.
Greenwald, M. J.
Hubbard, A. E.
Hughes, J. W.
Hutchinson, I. H.
Irby, J. H.
Lee, J.
Lin, Y.
Marmar, E. S.
Mumgaard, R.
Parker, R. R.
Scott, S. D.
Walk, J. R.
Wolfe, S. M.
Wukitch, S. J.
TI Effects of LHRF on toroidal rotation in Alcator C-Mod plasmas
SO NUCLEAR FUSION
LA English
DT Article
ID NO MOMENTUM INPUT; TOKAMAK PLASMA; DIII-D; CYCLOTRON; TRANSPORT;
FREQUENCY; JET
AB Application of lower hybrid range of frequencies (LHRF) waves can induce both co- and counter-current directed changes in toroidal rotation in Alcator C-Mod plasmas, depending on the target plasma current, electron density, confinement regime and magnetic shear. For ohmic L-mode discharges with good core LH wave absorption, and significant current drive at a fixed LH power near 0.8 MW, the interior (r/a < 0.5) rotation increments (on a time scale of order the current relaxation time) in the counter-current direction if n(e)(10(20) m(-3)) > q(95)/11.5, and in the co-current direction if n(e)(10(20) m(-3)) < q(95)/11.5. All discharges with co-current rotation changes have q(0) > 1, indicating a good correlation with driven current fraction, unifying the results observed on various tokamaks. For high density (n(e) >= 1.2 x 10(20) m(-3)) L-mode target discharges, where core LH wave absorption is low, the rotation change is in the co-current direction, but evolves on a shorter momentum transport time scale, and is seen across the entire spatial profile. For H-mode target plasmas, both co- and counter-current direction increments have been observed with LHRF. The H-mode co-rotation is correlated with the pedestal temperature gradient, which itself is enhanced by the LH waves absorbed in the plasma periphery. The H-mode counter-rotation increment, a flattening of the peaked velocity profile in the core, is consistent with a reduction in the momentum pinch correlated with a steepening of the core density profile. Most of these rotation changes must be due to indirect transport effects of LH waves on various parameters, which modify the momentum flux.
C1 [Rice, J. E.; Podpaly, Y. A.; Reinke, M. L.; Gao, C.; Shiraiwa, S.; Terry, J. L.; Theiler, C.; Wallace, G. M.; Bonoli, P. T.; Brunner, D.; Churchill, R. M.; Faust, I. C.; Granetz, R. S.; Greenwald, M. J.; Hubbard, A. E.; Hughes, J. W.; Hutchinson, I. H.; Irby, J. H.; Lee, J.; Lin, Y.; Marmar, E. S.; Mumgaard, R.; Parker, R. R.; Walk, J. R.; Wolfe, S. M.; Wukitch, S. J.] MIT, PSFC, Cambridge, MA 02139 USA.
[Cziegler, I.; Diamond, P. H.] Univ Calif San Diego, CMTFO, San Diego, CA 92093 USA.
[Delgado-Aparicio, L.; Fisch, N. J.; Scott, S. D.] PPPL, Princeton, NJ 08543 USA.
RP Rice, JE (reprint author), MIT, PSFC, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
OI Theiler, Christian/0000-0003-3926-1374; Greenwald,
Martin/0000-0002-4438-729X
FU DoE [DE-FC02-99ER54512]
FX The authors thank C. Fenzi, B. Chouli, F. Nave, M. Yoshida, S. Koide and
Y. Shi for information regarding LHCD rotation and the Alcator C-Mod
operations, LH and ICRF groups for expert running of the tokamak. Work
supported at MIT by DoE Contract No DE-FC02-99ER54512 and in part by an
appointment to the US DOE Fusion Energy Postdoctoral Research Programme
administered by ORISE.
NR 78
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U1 5
U2 29
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
EI 1741-4326
J9 NUCL FUSION
JI Nucl. Fusion
PD SEP
PY 2013
VL 53
IS 9
AR 093015
DI 10.1088/0029-5515/53/9/093015
PG 17
WC Physics, Fluids & Plasmas
SC Physics
GA 214TZ
UT WOS:000324160400017
ER
PT J
AU Solomon, WM
Politzer, PA
Buttery, RJ
Holcomb, CT
Ferron, JR
Garofalo, AM
Grierson, BA
Hanson, JM
In, Y
Jackson, GL
Kinsey, JE
La Haye, RJ
Lanctot, MJ
Luce, TC
Okabayashi, M
Petty, CC
Turco, F
Welander, AS
AF Solomon, W. M.
Politzer, P. A.
Buttery, R. J.
Holcomb, C. T.
Ferron, J. R.
Garofalo, A. M.
Grierson, B. A.
Hanson, J. M.
In, Y.
Jackson, G. L.
Kinsey, J. E.
La Haye, R. J.
Lanctot, M. J.
Luce, T. C.
Okabayashi, M.
Petty, C. C.
Turco, F.
Welander, A. S.
TI Access to high beta advanced inductive plasmas at low injected torque
SO NUCLEAR FUSION
LA English
DT Article
ID NEOCLASSICAL TEARING MODE; CYCLOTRON CURRENT DRIVE; DIII-D;
STABILIZATION; CONFINEMENT; PERFORMANCE; DISCHARGES; TRANSPORT;
TOKAMAKS; ITER
AB Recent experiments on DIII-D demonstrate that advanced inductive (AI) discharges with high equivalent normalized fusion gain can be accessed and sustained with very low amounts (similar to 1Nm) of externally injected torque, a level of torque that is anticipated to drive a similar amount of rotation as the beams on ITER, via simple consideration of the scaling of the moment of inertia and confinement time. The AI regime is typically characterized by high confinement, and high beta(N), allowing the possibility for high performance, high gain operation at reduced plasma current. Discharges achieved beta(N) similar to 3.1 with H-98(y,H-2) similar to 1 at q(95) similar to 4, and are sustained for the maximum duration of the counter neutral beams (NBs). In addition, plasmas using zero net NB torque from the startup all the way through to the high beta(N) phase have been created. AI discharges are found to become increasingly susceptible to m/n = 2/1 neoclassical tearing modes as the torque is decreased, which if left unmitigated, generally slow and lock, terminating the high performance phase of the discharge. Access is not notably different whether one ramps the torque down at high beta(N), or ramps beta(N) up at low torque. The use of electron cyclotron heating (ECH) and current drive proved to be an effective method of avoiding such modes, enabling stable operation at high beta and low torque, a portion of phase space that has otherwise been inaccessible. Thermal confinement is significantly reduced at low rotation, a result that is reproduced using the TGLF transport model. Although it is thought that stiffness is increased in regions of low magnetic shear, in these AI plasmas, the reduced confinement occurs at radii outside the low shear, and in fact, higher temperature gradients can be found in the low shear region at low rotation. Momentum transport is also larger at low rotation, but a significant intrinsic torque is measured that is consistent with a previous scaling considering the role of the turbulent Reynolds stress and thermal ion orbit loss. Although high normalized fusion performance has been achieved in these discharges, more detailed projections suggest that enhancement in the confinement needs to be realized in order to obtain a low current solution consistent with ITER Q = 10 performance, and this remains a future research challenge.
C1 [Solomon, W. M.; Grierson, B. A.; Okabayashi, M.] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Politzer, P. A.; Buttery, R. J.; Ferron, J. R.; Garofalo, A. M.; Jackson, G. L.; Kinsey, J. E.; La Haye, R. J.; Luce, T. C.; Petty, C. C.; Welander, A. S.] Gen Atom, San Diego, CA 92186 USA.
[Hanson, J. M.; Turco, F.] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA.
[In, Y.] FAR TECH Inc, San Diego, CA 92121 USA.
[Holcomb, C. T.; Lanctot, M. J.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Solomon, WM (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM wsolomon@pppl.gov
RI Lanctot, Matthew J/O-4979-2016;
OI Lanctot, Matthew J/0000-0002-7396-3372; Solomon,
Wayne/0000-0002-0902-9876
FU US Department of Energy [DE-AC02-09CH11466, DE-FC02-04ER54698,
DE-FG02-04ER54761, DE-FG02-08ER85195, DE-AC52-07NA27344]
FX This work was supported by the US Department of Energy under
DE-AC02-09CH11466, DE-FC02-04ER54698, DE-FG02-04ER54761,
DE-FG02-08ER85195 and DE-AC52-07NA27344.
NR 31
TC 6
Z9 6
U1 0
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
J9 NUCL FUSION
JI Nucl. Fusion
PD SEP
PY 2013
VL 53
IS 9
AR 093033
DI 10.1088/0029-5515/53/9/093033
PG 12
WC Physics, Fluids & Plasmas
SC Physics
GA 214TZ
UT WOS:000324160400035
ER
PT J
AU Belova, IV
Kulkarni, NS
Sohn, YH
Murch, GE
AF Belova, I. V.
Kulkarni, N. S.
Sohn, Y. H.
Murch, G. E.
TI Simultaneous measurement of tracer and interdiffusion coefficients: an
isotopic phenomenological diffusion formalism for the binary alloy
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
DE diffusion; SIMS; theoretical
ID VACANCIES; TRANSPORT; SOLIDS
AB In this paper, a new development of the classic Onsager phenomenological formalism is derived using relations based on linear response theory. The development concerns the correct description of the fluxes of the atomic isotopes. The resulting expressions in the laboratory frame are surprisingly simple and consist of terms coming from the standard interdiffusion expressions and from Fick's first law, where the tracer diffusion coefficient is involved thus providing a better understanding of the relationship between the two approaches - Fick's first law and the Onsager phenomenological formalism. From an experimental application perspective, the new development is applied to the binary alloy case. The formalism provides the means to obtain the interdiffusion coefficient and tracer diffusion coefficients simultaneously from analysis of the interdiffusion composition profiles in a single experiment.
C1 [Belova, I. V.; Murch, G. E.] Univ Newcastle, Ctr Mass & Thermal Transport Engn Mat, Callaghan, NSW 2308, Australia.
[Kulkarni, N. S.] Oak Ridge Natl Lab, Measurement Sci & Syst Engn Div, Oak Ridge, TN USA.
[Sohn, Y. H.] Univ Cent Florida, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA.
[Sohn, Y. H.] Univ Cent Florida, Dept Mech Mat & Aerosp Engn, Orlando, FL 32816 USA.
RP Belova, IV (reprint author), Univ Newcastle, Ctr Mass & Thermal Transport Engn Mat, Callaghan, NSW 2308, Australia.
EM Irina.Belova@newcastle.edu.au
RI Sohn, Yongho/A-8517-2010
OI Sohn, Yongho/0000-0003-3723-4743
FU Australian Research Council [DP130101464]; US Department of Energy,
Office of Vehicle Technologies, Automotive Lightweight Materials Program
[DE-AC05-00OR22725]; UT-Battelle, LLC
FX The authors (IVB and GEM) gratefully acknowledge encouraging discussions
with emeritus professor Alan Allnatt (University of Western
Ontario).This research was primarily supported under the Australian
Research Council Discovery Projects funding scheme (project number
DP130101464). Two of the authors (Kulkarni and Sohn) are also grateful
for the financial support from the US Department of Energy, Assistant
Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle
Technologies, Automotive Lightweight Materials Program under contract
DE-AC05-00OR22725 with UT-Battelle, LLC.
NR 11
TC 11
Z9 12
U1 0
U2 6
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PD SEP 1
PY 2013
VL 93
IS 26
BP 3515
EP 3526
DI 10.1080/14786435.2013.813982
PG 12
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 210EY
UT WOS:000323813300005
ER
PT J
AU Yu, KY
Sun, C
Chen, Y
Liu, Y
Wang, H
Kirk, MA
Li, M
Zhang, X
AF Yu, K. Y.
Sun, C.
Chen, Y.
Liu, Y.
Wang, H.
Kirk, M. A.
Li, M.
Zhang, X.
TI Superior tolerance of Ag/Ni multilayers against Kr ion irradiation: an
in situ study
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
DE Ag/Ni; in situ radiation; Kr; interface
ID RADIATION-DAMAGE; GRAIN-SIZE; FISSION NEUTRONS; VOID FORMATION;
COMPOSITES; BOUNDARIES; ENERGY; INTERFACES; REDUCTION; METALS
AB Monolithic Ag and Ni films and Ag/Ni multilayers with individual layer thickness of 5 and 50nm were subjected to in situ Kr ion irradiation at room temperature to 1 displacement-per-atom (a fluence of 2x10(14)ions/cm(2)). Monolithic Ag has high density of small loops (4nm in diameter), whereas Ni has fewer but much greater loops (exceeding 20nm). In comparison, dislocation loops, approximate to 4nm in diameter, were the major defects in the irradiated Ag/Ni 50nm film, while the loops were barely observed in the Ag/Ni 5nm film. At 0.2dpa (0.4x10(14)ions/cm), defect density in both monolithic Ag and Ni saturated at 1.6 and 0.2x10(23)/m(3), compared with 0.8x10(23)/m(3) in Ag/Ni 50nm multilayer at a saturation fluence of approximate to 1dpa (2x10(14)ions/cm(2)). Direct observations of frequent loop absorption by layer interfaces suggest that these interfaces are efficient defect sinks. Ag/Ni 5nm multilayer showed a superior morphological stability against radiation compared to Ag/Ni 50nm film.
C1 [Yu, K. Y.; Sun, C.; Chen, Y.; Liu, Y.; Wang, H.; Zhang, X.] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA.
[Wang, H.] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA.
[Kirk, M. A.] Argonne Natl Lab, Mat Sci Div, Argonne, IL 60439 USA.
[Li, M.] Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA.
[Zhang, X.] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA.
RP Zhang, X (reprint author), Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA.
EM zhangx@tamu.edu
RI Sun, Cheng/G-8953-2013; Yu, Kaiyuan /B-8398-2014; Liu, Yue/H-4071-2014;
Zhang, Xinghang/H-6764-2013; Wang, Haiyan/P-3550-2014; Chen,
Youxing/P-5006-2016
OI Sun, Cheng/0000-0002-1368-243X; Yu, Kaiyuan /0000-0002-5442-2992; Liu,
Yue/0000-0001-8518-5734; Zhang, Xinghang/0000-0002-8380-8667; Wang,
Haiyan/0000-0002-7397-1209; Chen, Youxing/0000-0003-1111-4495
FU US Army Research Office - Materials Science Division [W911NF-09-1-0223];
DOE-NEUP [DE-AC07-05ID14517-00088120]; NSF-DMR metallic materials and
nanostructures program [0644835]; DOE-BES
FX We acknowledge financial support by US Army Research Office - Materials
Science Division, under contract no. W911NF-09-1-0223. Radiation effort
was partially supported by DOE-NEUP under contract no.
DE-AC07-05ID14517-00088120. Y. Liu and a portion of TEM work were
supported by NSF-DMR metallic materials and nanostructures program,
under grant no. 0644835. We also thank Edward A. Ryan and Peter M. Baldo
at Argonne National Laboratory for their help during in situ
experiments. The IVEM facility at Argonne National Laboratory is
supported by DOE-BES.
NR 38
TC 17
Z9 17
U1 1
U2 26
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PD SEP 1
PY 2013
VL 93
IS 26
BP 3547
EP 3562
DI 10.1080/14786435.2013.815378
PG 16
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 210EY
UT WOS:000323813300007
ER
PT J
AU Allegrini, F
Dayeh, MA
Desai, MI
Funsten, HO
Fuselier, SA
Janzen, PH
McComas, DJ
Mobius, E
Reisenfeld, DB
Rodriguez, MDF
Schwadron, N
Wurz, P
AF Allegrini, F.
Dayeh, M. A.
Desai, M. I.
Funsten, H. O.
Fuselier, S. A.
Janzen, P. H.
McComas, D. J.
Moebius, E.
Reisenfeld, D. B.
Rodriguez, D. F. M.
Schwadron, N.
Wurz, P.
TI Lunar energetic neutral atom (ENA) spectra measured by the interstellar
boundary explorer (IBEX)
SO PLANETARY AND SPACE SCIENCE
LA English
DT Article
DE Energetic neutral atoms; ENA Moon albedo; Solar wind; IBEX
ID CHANDRAYAAN-1 MISSION; INSTRUMENT; MOON
AB The solar wind continuously flows out from the Sun, filling interplanetary space and directly interacting with the surfaces of small planetary bodies and other objects throughout the solar system. A significant fraction of these ions backscatter from the surface as energetic neutral atoms (ENAs). The first observations of these ENA emissions from the Moon were recently reported from the Interstellar Boundary Explorer (IBEX). These observations yielded a lunar ENA albedo of similar to 10% and showed that the Moon reflects similar to 150 metric tons of neutral hydrogen per year. More recently, a survey of the first 2.5 years of IBEX observations of lunar ENAs was conducted for times when the Moon was in the solar wind. Here, we present the first IBEX ENA observations when the Moon is inside the terrestrial magnetosheath and compare them with observations when the Moon is in the solar wind. Our analysis shows that: (1) the ENA intensities are on average higher when the Moon is in the magnetosheath, (2) the energy spectra are similar above similar to 0.6* solar wind energy but below there are large differences of the order of a factor of 10, (3) the energy spectra resemble a power law with a "hump" at similar to 0.6 * solar wind energy, and (4) this "hump" is broader when the Moon is in the magnetosheath. We explore potential scenarios to explain the differences, namely the effects of the topography of the lunar surface and the consequences of a very different Mach number in the solar wind versus in the magnetosheath. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Allegrini, F.; Dayeh, M. A.; Desai, M. I.; Fuselier, S. A.; McComas, D. J.] SW Res Inst, San Antonio, TX 78228 USA.
[Allegrini, F.; Desai, M. I.; McComas, D. J.] Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX 78249 USA.
[Funsten, H. O.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Janzen, P. H.; Reisenfeld, D. B.] Univ Montana, Missoula, MT 59812 USA.
[Moebius, E.; Schwadron, N.] Univ New Hampshire, Ctr Space Sci, Dept Phys & Astron, Durham, NH 03824 USA.
[Rodriguez, D. F. M.; Wurz, P.] Univ Bern, Inst Phys, CH-3012 Bern, Switzerland.
RP Allegrini, F (reprint author), SW Res Inst, PO Drawer 28510, San Antonio, TX 78228 USA.
EM fallegrini@swri.edu
RI Funsten, Herbert/A-5702-2015; Reisenfeld, Daniel/F-7614-2015;
OI Funsten, Herbert/0000-0002-6817-1039; Moebius,
Eberhard/0000-0002-2745-6978
FU Swiss national Science Foundation
FX We acknowledge the use of ACE and Wind solar wind data, provided through
the OMNIWeb Plus data at Goddard Space Flight Center through their
public through their public interface. Simulation results have been
provided by the Community Coordinated Modeling Center at Goddard Space
Flight Center through their public Runs on Request system
(http://ccmc.gsfc.nasa.gov). The CCMC is a multi-agency partnership
between NASA, AFMC, AFOSR, AFRL, AFWA, NOAA, NSF and ONR. The BATSRUS
Model was developed by the Dr. Tamas Gombosi et al. at the Center for
Space Environment Modeling, University of Michigan. We also acknowledge
the use of a Clementine basemap V2 map obtained from NASA PDS Imaging
Node, USGS Astrogeology Research Program. D.F.R.M. and P.W. acknowledge
the financial support by the Swiss national Science Foundation.
NR 25
TC 7
Z9 7
U1 1
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0032-0633
J9 PLANET SPACE SCI
JI Planet Space Sci.
PD SEP 1
PY 2013
VL 85
BP 232
EP 242
DI 10.1016/j.pss.2013.06.014
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 217MR
UT WOS:000324364100018
ER
PT J
AU Inabinett, D
Knight, T
Adams, T
Gray, J
AF Inabinett, D.
Knight, T.
Adams, T.
Gray, J.
TI Study of XeF2 fluorination potential against SrO, MoO3, and Nb2O5 in
TG/DTA for use in reactive gas recycle
SO PROGRESS IN NUCLEAR ENERGY
LA English
DT Article
DE Xenon difluoride; TG/DTA; Reactive gas recycle; Reprocessing;
Fluorination; Used nuclear fuel
ID FLUORIDE VOLATILITY METHOD; FUEL
AB Oxides SrO, MoO3, and Nb2O5, simulating parts of the Used Nuclear Fuel (UNF) matrix were fluorinated using XeF2 to form volatile and non-volatile compounds to demonstrate the possibility of a chemical and thermal separations. Experiments were conducted using a TG/DTA instrument at the milligram quantity scale, and XRD enabled confirmation for the fluorination reaction when sample residues were present. The study of these chemistries could be incorporated into advanced separations methods to provide another possible solution for the long-term, sustainability of nuclear power as the issue of reuse and disposal of commercial fuel continues to grow. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Inabinett, D.; Knight, T.] Univ S Carolina, Columbia, SC 29208 USA.
[Adams, T.; Gray, J.] Savannah River Natl Lab, Savannah, GA USA.
RP Knight, T (reprint author), Univ S Carolina, 300 Main St, Columbia, SC 29208 USA.
EM knighttw@cec.sc.edu
OI Knight, Travis/0000-0002-8517-7395
FU National Academy for Nuclear Training (NANT)
FX The authors Wish to acknowledge Joe Teprovich for his assistance in the
XRD analysis. Thanks are also given to SRNL's internship program which
allowed Dillon Inabinett to join the RGR research team and complete this
research. Finally, the authors would like to thank the National Academy
for Nuclear Training (NANT) in providing a fellowship to fund Dillon
Inabinett in his pursuit of a Master's Degree.
NR 6
TC 1
Z9 1
U1 0
U2 6
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0149-1970
J9 PROG NUCL ENERG
JI Prog. Nucl. Energy
PD SEP
PY 2013
VL 68
BP 16
EP 19
DI 10.1016/j.pnucene.2013.05.002
PG 4
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 218TT
UT WOS:000324456100002
ER
PT J
AU Tian, HM
Mancilla-David, F
Ellis, K
Muljadi, E
Jenkins, P
AF Tian, Hongmei
Mancilla-David, Fernando
Ellis, Kevin
Muljadi, Eduard
Jenkins, Peter
TI Determination of the optimal configuration for a photovoltaic array
depending on the shading condition
SO SOLAR ENERGY
LA English
DT Article
DE Photovoltaic array; Shading effects; Optimal configuration; Mathematical
simulation; Outdoor measurement
ID MODEL
AB This paper utilizes the cell-to-module-to-array model to investigate the effects of temperature and shading on the performance of a photovoltaic (PV) array. Three shading conditions for a PV array were investigated: (1) each module operates at the same cell temperature, but at a different irradiation level; (2) each module operates at the same irradiation level, but at a different cell temperature; (3) each module operates at a different cell temperature and irradiation level. Current voltage (I-V) and power voltage (P-V) curves were calculated from model results for each shading condition and the effect of the bypass diode. Model results were used to determine the optimal configuration depending on the shading condition. Outdoor experiments were performed to validate model results using a four module array composed of Kyocera's KC85TS PV panels. Measured I-V and P-V curves were obtained for different configurations of the PV array under natural shading conditions. Model results and outdoor measurement show good agreement and reveal that I-V curves display step behavior while P-V curves exhibit multiple extrema behavior. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Tian, Hongmei; Mancilla-David, Fernando] Univ Colorado, Dept Elect Engn, Denver, CO 80217 USA.
[Tian, Hongmei] Shenzhen Polytech, Ind Training Ctr, Shenzhen 518055, Guangdong, Peoples R China.
[Muljadi, Eduard] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Ellis, Kevin; Jenkins, Peter] Univ Colorado, Dept Mech Engn, Denver, CO 80217 USA.
RP Mancilla-David, F (reprint author), Univ Colorado, Dept Elect Engn, 1200 Larimer St, Denver, CO 80217 USA.
EM hmtian@szpt.edu.cn; Fernando.Mancilla-David@ucdenver.edu;
kevin.ellis86@gmail.com; eduard.muljadi@nrel.gov;
Peter.Jenkins@ucdenver.edu
NR 20
TC 19
Z9 19
U1 0
U2 13
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-092X
J9 SOL ENERGY
JI Sol. Energy
PD SEP
PY 2013
VL 95
BP 1
EP 12
DI 10.1016/j.solener.2013.05.028
PG 12
WC Energy & Fuels
SC Energy & Fuels
GA 212WN
UT WOS:000324013600001
ER
PT J
AU Ho, CK
Sment, J
Yuan, J
Sims, CA
AF Ho, Clifford K.
Sment, Jeremy
Yuan, James
Sims, Cianan A.
TI Evaluation of a reflective polymer film for heliostats
SO SOLAR ENERGY
LA English
DT Article
DE Heliostat; Polymer film; SMF1100; Beam quality
AB Commercially available Solar Mirror Film (SMF) 1100 from 3M was evaluated for application in concentrating solar power tower applications, where large arrays of heliostats are used to reflect and concentrate sunlight toward a central receiver at potentially large distances. The reflectance and soiling rate of SMF1100 was compared to silvered glass mirrors during outdoor exposure for over a year. In addition, the reflected beam quality and peak flux resulting from solar reflections from SMF1100 and silvered glass facets at distances up to 1700 m were compared. Results showed that the impacts of soiling and outdoor exposure on the solar-weighted reflectance of coupons of SMF1100 did not differ significantly from that of silvered glass over a year of testing. However, the initial (clean) specular reflectance (at 660 nm) of SMF1100 was found to be similar to 2-4% lower than that of silvered glass for acceptance angles ranging from 25 mrad to 15 mrad, which contributed to a lower overall heliostat beam power projected onto the tower similar to 200 m away when compared to an adjacent heliostat with silvered glass. The peak flux was measured from individual facets with SMF1100 and silvered glass at distances up to similar to 1700 m. Slight differences existed in the focal length, specular reflectance, and time of testing of the individual facets, but results showed that the mean of the measured peak fluxes (normalized to the direct normal irradiance at the time of testing) of the SMF100 and silvered glass facets were statistically similar. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Ho, Clifford K.; Sment, Jeremy; Yuan, James; Sims, Cianan A.] Sandia Natl Labs, Concentrating Solar Technol Dept, Albuquerque, NM 87185 USA.
RP Ho, CK (reprint author), Sandia Natl Labs, Concentrating Solar Technol Dept, POB 5800, Albuquerque, NM 87185 USA.
EM ckho@sandia.gov
FU US Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]
FX The authors thank Mark O'Neill, Mark Speir, Roger Buck, Joe Eaton, Ed
Smith, J.J. Kelton, Daniel Ray, Bradley Ho, and Cheryl Ghanbari for
their assistance with the testing. Sandia National Laboratories is a
multi-program laboratory managed and operated by Sandia Corporation, a
wholly owned subsidiary of Lockheed Martin Corporation, for the US
Department of Energy's National Nuclear Security Administration under
contract DE-AC04-94AL85000.
NR 9
TC 2
Z9 2
U1 0
U2 27
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-092X
J9 SOL ENERGY
JI Sol. Energy
PD SEP
PY 2013
VL 95
BP 229
EP 236
DI 10.1016/j.solener.2013.06.015
PG 8
WC Energy & Fuels
SC Energy & Fuels
GA 212WN
UT WOS:000324013600020
ER
PT J
AU Forst, M
Mankowsky, R
Bromberger, H
Fritz, DM
Lemke, H
Zhu, D
Chollet, M
Tomioka, Y
Tokura, Y
Merlin, R
Hill, JP
Johnson, SL
Cavalleri, A
AF Foerst, M.
Mankowsky, R.
Bromberger, H.
Fritz, D. M.
Lemke, H.
Zhu, D.
Chollet, M.
Tomioka, Y.
Tokura, Y.
Merlin, R.
Hill, J. P.
Johnson, S. L.
Cavalleri, A.
TI Displacive lattice excitation through nonlinear phononics viewed by
femtosecond X-ray diffraction
SO SOLID STATE COMMUNICATIONS
LA English
DT Article
DE Correlated electron systems; Ionic Raman Scattering; Nonlinear
phononics; Time-resolved hard X-ray diffraction
ID RAMAN-SCATTERING; METAL TRANSITION; SUPERCONDUCTIVITY; VISUALIZATION;
MANGANITE; LAMNO3; PHASE
AB The nonlinear lattice dynamics of La0.7Sr0.3MnO3, as initiated by strong mid-infrared femtosecond pulses made resonant with a specific lattice vibration, are measured with ultrafast X-ray diffraction at the LCLS free electron laser. Our experiments show that large amplitude excitation of an infrared-active stretching mode leads also to a displacive motion along the coordinate of a second, anharmonically coupled, Raman mode. This rectification of the vibrational field is described within the framework of the Ionic Raman Scattering theory and explains how direct lattice excitation in the nonlinear regime can induce a structural phase transition. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Foerst, M.; Mankowsky, R.; Bromberger, H.; Cavalleri, A.] Max Planck Inst Struct & Dynam Matter, D-22761 Hamburg, Germany.
[Fritz, D. M.; Lemke, H.; Zhu, D.; Chollet, M.] SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA.
[Tomioka, Y.] AIST, Correlated Electron Engn Grp, Tsukuba, Ibaraki 3058562, Japan.
[Tokura, Y.] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan.
[Merlin, R.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
[Hill, J. P.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
[Johnson, S. L.] ETH, Inst Quantum Elect, Dept Phys, CH-8093 Zurich, Switzerland.
[Cavalleri, A.] Univ Oxford, Dept Phys, Oxford OX1 3PU, England.
RP Forst, M (reprint author), Max Planck Inst Struct & Dynam Matter, D-22761 Hamburg, Germany.
EM michael.foerst@mpsd.cfel.de; andrea.cavalleri@mpsd.cfel.de
RI Zhu, Diling/D-1302-2013; Forst, Michael/D-8924-2012; Johnson,
Steven/B-3252-2008; Tokura, Yoshinori/C-7352-2009; Lemke, Henrik
Till/N-7419-2016;
OI Johnson, Steven/0000-0001-6074-4894; Lemke, Henrik
Till/0000-0003-1577-8643; Merlin, Roberto/0000-0002-5584-0248
FU US Department of Energy, Division of Materials Science
[DE-AC02-98CH10886]
FX Work performed at Brookhaven National Laboratory was supported by the US
Department of Energy, Division of Materials Science, under Contract no.
DE-AC02-98CH10886.
NR 25
TC 17
Z9 17
U1 2
U2 47
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-1098
J9 SOLID STATE COMMUN
JI Solid State Commun.
PD SEP
PY 2013
VL 169
BP 24
EP 27
DI 10.1016/j.ssc.2013.06.024
PG 4
WC Physics, Condensed Matter
SC Physics
GA 218SI
UT WOS:000324452400006
ER
PT J
AU McManamay, RA
Orth, DJ
Dolloff, CA
AF McManamay, Ryan A.
Orth, Donald J.
Dolloff, Charles A.
TI Macroinvertebrate Community Responses to Gravel Addition in a
Southeastern Regulated River
SO SOUTHEASTERN NATURALIST
LA English
DT Article
ID BENTHIC INVERTEBRATE COMMUNITIES; STREAM HABITAT RESTORATION; CALIFORNIA
RIVER; ECOSYSTEM; ASSEMBLAGES; REHABILITATION; DISTURBANCE; DIVERSITY;
DYNAMICS; RECOVERY
AB Sediment transport, one of the key processes of river systems, is altered or stopped by dams, leaving lower river reaches barren of sand and gravel, both of which are essential habitat for fish and macroinvertebrates. One way to compensate for losses in sediment is to supplement gravel to river reaches below impoundments. Because gravel addition has become a widespread practice, it is essential to evaluate the biotic response to restoration projects in order to improve the efficacy of future applications. The purpose of our study was to evaluate the response of the macroinvertebrate community to gravel addition in a high-gradient, regulated river in western North Carolina. We collected benthic macroinvertebrate samples from gravel-enhanced areas and unenhanced areas for 1 season before gravel addition, and for 4 seasons afterwards. Repeated measures multivariate analysis of variance indicated that the responses of macroinvertebrates to gravel addition were generally specific to individual taxa or particular functional feeding groups and did not lead to consistent patterns in overall family richness, diversity, density, or evenness. Non-metric multi-dimensional scaling showed that shifts in macroinvertebrate community composition were temporary and dependent upon site conditions and season. Correlations between macroinvertebrate response variables and substrate microhabitat variables existed with or without the inclusion of data from enhanced areas, which suggests that substrate-biotic relationships were present before gravel addition. A review of the current literature suggests that the responses of benthic macroinvertebrates to substrate restoration are inconsistent and dependent upon site conditions and the degree habitat improvement of pre-restoration site conditions.
C1 [McManamay, Ryan A.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Orth, Donald J.] Virginia Polytech Inst & State Univ, Dept Fish & Wildlife Conservat, Blacksburg, VA 24061 USA.
[Dolloff, Charles A.] Virginia Polytech Inst & State Univ, US Forest Serv, USDA, Dept Fish & Wildlife Conservat, Blacksburg, VA 24061 USA.
RP McManamay, RA (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM mcmanamayra@ornl.gov
FU Cheoah Fund Board; Alcoa Power; USDA Forest Service; US Fish and
Wildlife Service; North Carolina Wildlife Resources Commission; NC
Division of Water Resources-DENR; Sigma Xi Scientific Research Society
FX This work was funded by the Cheoah Fund Board, a multi-agency
collaboration between Alcoa Power, USDA Forest Service, US Fish and
Wildlife Service, North Carolina Wildlife Resources Commission, and the
NC Division of Water Resources-DENR, and other grants provided by the
USDA Forest Service. Funding was also provided through the
Grants-in-Aid-of-Research program through Sigma Xi Scientific Research
Society. We thank Travis Patton, Toby Coyner, and Rachel McManamay for
their assistance in the field and Jason Herrala for his assistance in
the lab. We also thank John Smith for his assistance with statistical
procedures.
NR 49
TC 1
Z9 1
U1 2
U2 38
PU HUMBOLDT FIELD RESEARCH INST
PI STEUBEN
PA PO BOX 9, STEUBEN, ME 04680-0009 USA
SN 1528-7092
J9 SOUTHEAST NAT
JI Southeast. Nat.
PD SEP
PY 2013
VL 12
IS 3
BP 599
EP 618
DI 10.1656/058.012.0313
PG 20
WC Biodiversity Conservation; Ecology
SC Biodiversity & Conservation; Environmental Sciences & Ecology
GA 217RW
UT WOS:000324378800013
ER
PT J
AU Aruga, Y
Nako, H
Tsuneishi, H
Hasegawa, Y
Tao, H
Ichihara, C
Serizawa, A
AF Aruga, Yasuhiro
Nako, Hidenori
Tsuneishi, Hidemasa
Hasegawa, Yuki
Tao, Hiroaki
Ichihara, Chikara
Serizawa, Ai
TI Effect of Mg or Ag addition on the evaporation field of Al
SO ULTRAMICROSCOPY
LA English
DT Article; Proceedings Paper
CT 53rd International Field Emission Symposium (IFES)
CY MAY 21-25, 2013
CL Tuscaloosa, AL
DE Atom probe tomography; Evaporation field; Image force model; Work
function; Binding energy; Al alloy
ID 3D ATOM-PROBE; TEMPERATURE; IONS
AB It is known that the distribution of the charge-states as well as the evaporation field shift to higher values as the specimen temperature is decreased at a constant rate of evaporation. This study has explored the effect of Mg or Ag addition on the evaporation field of Al in terms of the charge state distribution of the field evaporated Al ions. The fractional abundance of Al2+ ions with respect to the total Al ions in Al-Mg alloy is lower than that in pure Al, whereas it shows higher level in the Al-Ag alloy at lower temperatures. The temperature dependence of the fractional abundance of Al2+ ions has been also confirmed, suggesting that Al atoms in the Al-Mg alloy need lower evaporation field, while higher field is necessary to evaporate Al atoms in the Al-Ag alloy, compared with pure Al. This tendency is in agreement with that of the evaporation fields estimated theoretically by means of measurements of the work function and calculations of the binding energy of the pure Al, Al-Mg and Al-Ag alloys. (C) 2012 Elsevier B.V. All rights reserved.
C1 [Aruga, Yasuhiro; Nako, Hidenori] Kobe Steel Ltd, Mat Res Lab, Nishi Ku, Kobe, Hyogo 6512271, Japan.
[Tsuneishi, Hidemasa; Hasegawa, Yuki] Kobelco Res Inst Inc, Div Elect, Nishi Ku, Kobe, Hyogo 6512271, Japan.
[Tao, Hiroaki; Ichihara, Chikara] Kobe Steel Ltd, Elect Res Lab, Nishi Ku, Kobe, Hyogo 6512271, Japan.
[Serizawa, Ai] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Aruga, Y (reprint author), Kobe Steel Ltd, Mat Res Lab, Nishi Ku, 1-5-5Takatsukadai, Kobe, Hyogo 6512271, Japan.
EM aruga.yasuhiro@kobelco.com
FU Office of Basic Energy Sciences, US Department of Energy
[DE-AC05-000R22725]; UT-Battelle, LLC.
FX This research was conducted at the Oak Ridge National Laboratory SHaRE
User Facility, which is sponsored by the Office of Basic Energy
Sciences, US Department of Energy, under Contract no, DE-AC05-000R22725
with UT-Battelle, LLC. The authors thank Dr. Michael K. Miller of ORNL
for fruitful discussions and Dr. Baptiste Gault of McMaster University
for helpful comments.
NR 17
TC 1
Z9 1
U1 3
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
EI 1879-2723
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD SEP
PY 2013
VL 132
BP 31
EP 35
DI 10.1016/j.ultramic.2012.10.011
PG 5
WC Microscopy
SC Microscopy
GA 215UF
UT WOS:000324235500006
PM 23234834
ER
PT J
AU Broderick, SR
Bryden, A
Suram, SK
Rajan, K
AF Broderick, Scott R.
Bryden, Aaron
Suram, Santosh K.
Rajan, Krishna
TI Data mining for isotope discrimination in atom probe tomography
SO ULTRAMICROSCOPY
LA English
DT Article; Proceedings Paper
CT 53rd International Field Emission Symposium (IFES)
CY MAY 21-25, 2013
CL Tuscaloosa, AL
DE Atom probe tomography (APT); Eigenvalue decomposition; Kinetic energy
discrimination; Principal component analysis (PCA); Data visualization
ID SPECTRA; ENERGY
AB Ions with similar time (TOP) can be discriminated by mapping their kinetic energy. While current generation position sensitive detectors have been considered insufficient for capturing the isotope kinetic energy, we demonstrate in this paper that statistical learning methodologies can be used to capture the kinetic energy from all or the parameters currently measured by mathematically transforming the signal. This approach works because the kinetic energy is sufficiently described by the descriptors on the potential, the material, and the evaporation process within atom probe tomography (APT). We discriminate the isotopes for Mg and Al by capturing the kinetic energy, and then decompose the TOF spectrum into its isotope components and identify the isotope for each individual atom measured. This work demonstrates the value of advanced data mining methods to help enhance the information resolution of the atom probe. (C) 2013 Elsevier By. All rights reserved.
C1 [Broderick, Scott R.; Suram, Santosh K.; Rajan, Krishna] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
[Broderick, Scott R.; Suram, Santosh K.; Rajan, Krishna] Iowa State Univ, Inst Combinatorial Discovery, Ames, IA 50011 USA.
[Bryden, Aaron] Ames Natl Lab, Ames, IA 50011 USA.
RP Rajan, K (reprint author), Iowa State Univ, I2220 Hoover Hall, Ames, IA 50011 USA.
EM krajan@iastate.edu
FU NSF-CDI Type II program [PHY 09-41576]; NSF-ARI Program [CMMI
09-3890182]; Defense Advanced Research Projects Agency (DARPA) N/MEMS
S&T Fundamentals program [N66001-10-1-4004]; Space and Naval Warfare
Systems Center Pacific (SPAWAR); Air Force Office of Scientific Research
(AFOSR) [FA9550-10-1-0256, FA9550-11-1-0158, FA9550-12-0496]; Wilkinson
Professorship of Interdisciplinary Engineering
FX This work was supported by NSF-CDI Type II program: grant no. PHY
09-41576; NSF-ARI Program: CMMI 09-3890182; the Defense Advanced
Research Projects Agency (DARPA) N/MEMS S&T Fundamentals program under
grant no. N66001-10-1-4004 issued by the Space and Naval Warfare Systems
Center Pacific (SPAWAR); and Air Force Office of Scientific Research
(AFOSR) grant nos. FA9550-10-1-0256, FA9550-11-1-0158 and
FA9550-12-0496. KR also acknowledges support from the Wilkinson
Professorship of Interdisciplinary Engineering.
NR 20
TC 7
Z9 7
U1 2
U2 24
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
EI 1879-2723
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD SEP
PY 2013
VL 132
BP 121
EP 128
DI 10.1016/j.ultramic.2013.02.001
PG 8
WC Microscopy
SC Microscopy
GA 215UF
UT WOS:000324235500021
PM 23522846
ER
PT J
AU Bryden, A
Broderick, S
Suram, SK
Kaluskar, K
LeSar, R
Rajan, K
AF Bryden, Aaron
Broderick, Scott
Suram, Santosh K.
Kaluskar, Kaustubh
LeSar, Richard
Rajan, Krishna
TI Interactive visualization of APT data at full fidelity
SO ULTRAMICROSCOPY
LA English
DT Article; Proceedings Paper
CT 53rd International Field Emission Symposium (IFES)
CY MAY 21-25, 2013
CL Tuscaloosa, AL
DE Atom probe tomography; Visualization; Spherical impostor; Materials
visualization
ID ATOM-PROBE TOMOGRAPHY; FIELD EVAPORATION; SPATIAL-RESOLUTION;
MASS-SPECTRA; SURFACE; MICROSTRUCTURES; BEHAVIOR; TUNGSTEN; SILICON
AB Understanding the impact of noise and incomplete data is a critical need for using atom probe tomography effectively. Although many tools and techniques have been developed to address this problem, visualization of the raw data remains an important part of this process. In this paper, we present two contributions to the visualization of data acquired through atom probe tomography. First, we describe the application of a rendering technique, ray cast spherical impostors, that enables the interactive rendering of large numbers (as large as 10 million plus) of pixel perfect, lit spheres representing individual atoms. This technique is made possible by the use of a consumer level graphics processing unit (CPU), and it yields an order of magnitude improvement both in render quality and speed over techniques previously used to render spherical glyphs in this domain. Second, we present an interactive tool that allows the user to mask, filter, and colorize the data in real time to help them understand and visualize a precise subset and properties of the raw data. We demonstrate the effectiveness of our tool through benchmarks and an example that shows how the ability to interactively render large numbers of spheres, combined with the use of filters and masks, leads to improved understanding of the three-dimensional (3D) and incomplete nature of atom probe data This improvement arises from the ability of lit spheres to more effectively show the 3D position and the local spatial distribution of individual atoms than what is possible with point or isosurface renderings. The techniques described in this paper serve to introduce new rendering and interaction techniques that have only recently become practical as well as new ways of interactively exploring the raw data (C) 2012 Elsevier B.V. All rights reserved.
C1 [Bryden, Aaron; LeSar, Richard] Ames Natl Lab, Ames, IA 50011 USA.
[Broderick, Scott; Suram, Santosh K.; Kaluskar, Kaustubh; LeSar, Richard; Rajan, Krishna] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
[Broderick, Scott; Suram, Santosh K.; Kaluskar, Kaustubh; LeSar, Richard; Rajan, Krishna] Iowa State Univ, Inst Combinatorial Discovery, Ames, IA 50011 USA.
RP Rajan, K (reprint author), Iowa State Univ, Dept Mat Sci & Engn, 2220 Hoover Hall, Ames, IA 50011 USA.
EM krajan@iastate.edu
FU US Department of Energy National Energy Technology Laboratory;
Department of Energy [DE-AC02-07CH11358]; US Department of Energy,
Office of Basic Energy Sciences; NSF-CDI [PHY 09-41576]; NSF-ARI [CMMI
09-3890182]; Defense Advanced Research Projects Agency (DARPA) N/MEMS
S&T Fundamentals program [N66001-10-1-4004]; Space and Naval Warfare
Systems Center Pacific (SPAWAR); Wilkinson Professorship of
Interdisciplinary Engineering
FX The work of A.B. was funded in part by the US Department of Energy
National Energy Technology Laboratory. Work at the Ames Laboratory was
supported by the Department of Energy under Contract no.
DE-AC02-07CH11358, The work of R.L. was funded in part by the US
Department of Energy, Office of Basic Energy Sciences, SB, SKS, KK, and
KR were supported by NSF-CDI Type II program: grant #PHY 09-41576
NSF-ARI Program: CMMI 09-3890182; the Defense Advanced Research Projects
Agency (DARPA) N/MEMS S&T Fundamentals program under Grant no.
N66001-10-1-4004 issued by the Space and Naval Warfare Systems Center
Pacific (SPAWAR). KR also acknowledges support from the Wilkinson
Professorship of Interdisciplinary Engineering.
NR 41
TC 2
Z9 2
U1 1
U2 21
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3991
EI 1879-2723
J9 ULTRAMICROSCOPY
JI Ultramicroscopy
PD SEP
PY 2013
VL 132
BP 129
EP 135
DI 10.1016/j.ultramic.2012.12.006
PG 7
WC Microscopy
SC Microscopy
GA 215UF
UT WOS:000324235500022
PM 23352804
ER
PT J
AU Chen-Wiegart, YCK
Wang, S
McNulty, I
Dunand, DC
AF Chen-Wiegart, Yu-chen Karen
Wang, Steve
McNulty, Ian
Dunand, David C.
TI Effect of Ag-Au composition and acid concentration on dealloying front
velocity and cracking during nanoporous gold formation
SO ACTA MATERIALIA
LA English
DT Article
DE Nanofoam; TXM; X-ray imaging; In situ
ID BEHAVIOR; EVOLUTION
AB Nanoporous gold has many potential applications in various fields, including energy storage, catalysis, sensing and actuating. Dealloying of Ag-Au alloys under free corrosion conditions is a simple method to fabricate nanoporous gold. Here, we systematically investigate the dealloying rate of Ag-xAu alloy for a range of alloy compositions (x = 20-40 at.%) and nitric acid concentration (7.3-14.9 M) using in situ transmission X-ray microscopy. High-resolution in situ X-ray projections and ex situ tomographic reconstructions allow imaging of the dealloying front position during dealloying. The dealloying front velocity is constant with time, and depends exponentially on the alloy Ag/Au atomic ratio and the acid molar concentration. Only the leanest alloy, Ag-20 Au, shows a large macroscopic shrinkage in sample diameter (similar to 38%) after dealloying, which leads to crack nucleation and growth observed in real time during dealloying. Finite element modeling is used to estimate dealloying-induced stresses and strains, and sheds light on the cracks created by the diameter shrinkage. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Chen-Wiegart, Yu-chen Karen; Dunand, David C.] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
[Wang, Steve] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[McNulty, Ian] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
RP Chen-Wiegart, YCK (reprint author), Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
EM yuchen.karen.chen@gmail.com
RI Dunand, David/B-7515-2009;
OI Dunand, David/0000-0001-5476-7379
FU US Department of Energy, Office of Science, Office of Basic Energy
Sciences [DE-AC02-06CH11357]
FX We gratefully thank Prof. Peter Voorhees (NU) for useful discussions
throughout the experimental design and data analysis and Mr. Alex Deny
(APS) who helped with the in situ dealloying setup. X-ray imaging was
assisted by Dr. Alix Deymier-Black (NU), Ms. Rachel Mak (NU) and Mr.
Ashish Tripathi (U Melbourne). Use of the APS is supported by the US
Department of Energy, Office of Science, Office of Basic Energy
Sciences, under Contract No. DE-AC02-06CH11357.
NR 42
TC 11
Z9 12
U1 3
U2 74
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD SEP
PY 2013
VL 61
IS 15
BP 5561
EP 5570
DI 10.1016/j.actamat.2013.05.039
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 210AK
UT WOS:000323801500002
ER
PT J
AU Pasebani, S
Charit, I
Wu, YQ
Butt, DP
Cole, JI
AF Pasebani, S.
Charit, I.
Wu, Y. Q.
Butt, D. P.
Cole, J. I.
TI Mechanical alloying of lanthana-bearing nanostructured ferritic steels
SO ACTA MATERIALIA
LA English
DT Article
DE Mechanical alloying; Nanostructured ferritic steels; Oxide dispersion
strengthened steels; Lanthanum oxide
ID 3-DIMENSIONAL ATOM-PROBE; OXIDE; PARAMETERS; CLUSTERS
AB A novel nanostructured ferritic steel powder with the nominal composition Fe-14Cr-1Ti-0.3Mo-0.5La(2)O(3) (wt.%) was developed via high energy ball milling. La2O3 was added to this alloy instead of the traditionally used Y2O3. The effects of varying the ball milling parameters, such as milling time, steel ball size and ball to powder ratio, on the mechanical properties and microstructural characteristics of the as-milled powder were investigated. Nanocrystallites of a body-centered cubic ferritic solid solution matrix with a mean size of approximately 20 nm were observed by transmission electron microscopy. Nanoscale characterization of the as-milled powder by local electrode atom probe tomography revealed the formation of Cr-Ti-La-O-enriched nanoclusters during mechanical alloying. The Cr:Ti:La:O ratio is considered "non-stoichiometric". The average size (radius) of the nanoclusters was about 1 nm, with number density of 3.7 x 10(24) m(-3). The mechanism for formation of nanoclusters in the as-milled powder is discussed. La2O3 appears to be a promising alternative rare earth oxide for future nanostructured ferritic steels. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Pasebani, S.; Charit, I.] Univ Idaho, Dept Chem & Mat Engn, Moscow, ID 83844 USA.
[Pasebani, S.; Charit, I.; Wu, Y. Q.; Butt, D. P.; Cole, J. I.] Ctr Adv Energy Studies, Idaho Falls, ID 83401 USA.
[Wu, Y. Q.; Butt, D. P.] Boise State Univ, Dept Mat Sci & Engn, Boise, ID 83725 USA.
[Cole, J. I.] Idaho Natl Lab, Idaho Falls, ID 83401 USA.
RP Charit, I (reprint author), Univ Idaho, Dept Chem & Mat Engn, Moscow, ID 83844 USA.
EM icharit@uidaho.edu
RI Pasebani, Somayeh/G-5448-2014;
OI Cole, James/0000-0003-1178-5846
FU Laboratory Directed Research and Development Program of the Idaho
National Laboratory [DE-AC07-05ID14517]; Advanced Test Reactor National
Scientific User Facility
FX This work was supported partly by the Laboratory Directed Research and
Development Program of the Idaho National Laboratory, contract
DE-AC07-05ID14517, and partly by a grant from the Advanced Test Reactor
National Scientific User Facility. TEM and APT were done at the
Microscopy and Characterization Suite (MaCS), Center for Advanced Energy
Studies. We would also like to acknowledge the help of Ms Jatupom Burns
and Dr Kerry Allahar. Furthermore, we would like to thank the reviewers
for their helpful comments.
NR 35
TC 16
Z9 16
U1 2
U2 37
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
EI 1873-2453
J9 ACTA MATER
JI Acta Mater.
PD SEP
PY 2013
VL 61
IS 15
BP 5605
EP 5617
DI 10.1016/j.actamat.2013.06.002
PG 13
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 210AK
UT WOS:000323801500006
ER
PT J
AU Zhu, YY
Ophus, C
Ciston, J
Wang, HY
AF Zhu, Yuanyuan
Ophus, Colin
Ciston, Jim
Wang, Haiyan
TI Interface lattice displacement measurement to 1 pm by geometric phase
analysis on aberration-corrected HAADF STEM images
SO ACTA MATERIALIA
LA English
DT Article
DE Lattice strains; Heterogeneous interface; Thin films; Scanning
transmission electron microscopy (STEM); Geometric phase analysis (GPA)
ID TRANSMISSION ELECTRON-MICROSCOPY; DARK-FIELD IMAGES; SURFACE RELAXATION;
STRAIN; HETEROSTRUCTURES; INSULATOR; CONTRAST; DEFECTS; ORIGIN; HREM
AB In this work, the accuracy of geometric phase analysis (GPA) on aberration-corrected high-angle annular dark-field scanning transmission electron microscopy (Cs-corrected HAADF-STEM) images for lattice strain measurement at heterogeneous interfaces has been systematically investigated. Starting with an ideal crystal lattice of synthetic images, and then experimental HAADF images of a single-crystal lattice, we have quantitatively evaluated the inherent GPA processing artifacts and experimental errors due to STEM scanning distortions. Our results suggest that, with a properly chosen Fourier mask size and strain profile direction/width, 1 pm accuracy can be achieved for GPA strain quantification in the STEM fast-scan direction with a spatial resolution of <1 nm. To demonstrate the effectiveness and reliability of the STEM-based GPA strain profile, we have applied it to two experimental heterointerfaces: the strained LaAlO3/SrTiO3 (LAO/STO) and the relaxed SrTiO3/MgO (STO/MgO). Interestingly, GPA strain mapping reveals a novel secondary relaxation mechanism in the LAO/STO heterostructures. Essential limitations in GPA are also discussed using the example of a FeSe0.5Te0.5(FST)/SrTiO3 heterointerface. Although we focus on the interfacial lattice strain in this paper, the approaches for strain error estimation and the fundamental discussions on line profiles can also be applied, with some modifications, to other nanostructures. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Zhu, Yuanyuan; Wang, Haiyan] Texas A&M Univ, Program Mat Sci & Engn, College Stn, TX 77843 USA.
[Ophus, Colin; Ciston, Jim] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
[Wang, Haiyan] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA.
RP Wang, HY (reprint author), Texas A&M Univ, Program Mat Sci & Engn, College Stn, TX 77843 USA.
EM wangh@ece.tamu.edu
RI Wang, Haiyan/P-3550-2014; Foundry, Molecular/G-9968-2014;
OI Wang, Haiyan/0000-0002-7397-1209; Ophus, Colin/0000-0003-2348-8558
FU National Science Foundation [0846504]; Air Force Office of Scientific
Research [FA9550-09-1-0114]; Office of Science, Office of Basic Energy
Sciences of the US Department of Energy [DE-AC02-05CH11231]
FX This research was funded by National Science Foundation (Ceramic Program
Award No. 0846504). The superconductor work was funded by the Air Force
Office of Scientific Research (Contract No. FA9550-09-1-0114). A portion
of the electron microscopy experiments were performed at NCEM, which is
supported by the Office of Science, Office of Basic Energy Sciences of
the US Department of Energy under Contract No. DE-AC02-05CH11231. Y.Z.
is grateful to Drs. A. Minor, C. Kisielowski and Chengyu Song for
additional help and fruitful discussions at NCEM. Y.Z. also thanks Dr.
Holzenburg at TAMU for the advice on conducting complementary real space
measurement.
NR 44
TC 11
Z9 11
U1 6
U2 88
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD SEP
PY 2013
VL 61
IS 15
BP 5646
EP 5663
DI 10.1016/j.actamat.2013.06.006
PG 18
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 210AK
UT WOS:000323801500010
ER
PT J
AU Otto, F
Dlouhy, A
Somsen, C
Bei, H
Eggeler, G
George, EP
AF Otto, F.
Dlouhy, A.
Somsen, Ch.
Bei, H.
Eggeler, G.
George, E. P.
TI The influences of temperature and microstructure on the tensile
properties of a CoCrFeMnNi high-entropy alloy
SO ACTA MATERIALIA
LA English
DT Article
DE High-entropy alloys; Mechanical properties; Deformation twinning; Yield
strength; Temperature dependence
ID STACKING-FAULT ENERGY; STRESS-STRAIN BEHAVIOR; MULTICOMPONENT ALLOYS;
SINGLE-CRYSTALS; DEFORMATION-BEHAVIOR; TRIP/TWIP STEELS;
PHASE-STABILITY; SOLID-SOLUTIONS; YIELD REGION; FCC ALLOYS
AB An equiatomic CoCrFeMnNi high-entropy alloy, which crystallizes in the face-centered cubic (fcc) crystal structure, was produced by arc melting and drop casting. The drop-cast ingots were homogenized, cold rolled and recrystallized to obtain single-phase microstructures with three different grain sizes in the range 4-160 mu m. Quasi-static tensile tests at an engineering strain rate of 10(-3) s(-1) were then performed at temperatures between 77 and 1073 K. Yield strength, ultimate tensile strength and elongation to fracture all increased with decreasing temperature. During the initial stages of plasticity (up to similar to 2% strain), deformation occurs by planar dislocation glide on the normal fcc slip system, {1 1 1} < 1 1 0 >, at all the temperatures and grain sizes investigated. Undissociated 1/2 < 1 1 0 > dislocations were observed, as were numerous stacking faults, which imply the dissociation of several of these dislocations into 1/6 < 1 1 2 > Shockley partials. At later stages (similar to 20% strain), nanoscale deformation twins were observed after interrupted tests at 77 K, but not in specimens tested at room temperature, where plasticity occurred exclusively by the aforementioned dislocations which organized into cells. Deformation twinning, by continually introducing new interfaces and decreasing the mean free path of dislocations during tensile testing ("dynamic Hall-Petch"), produces a high degree of work hardening and a significant increase in the ultimate tensile strength. This increased work hardening prevents the early onset of necking instability and is a reason for the enhanced ductility observed at 77 K. A second reason is that twinning can provide an additional deformation mode to accommodate plasticity. However, twinning cannot explain the increase in yield strength with decreasing temperature in our high-entropy alloy since it was not observed in the early stages of plastic deformation. Since strong temperature dependencies of yield strength are also seen in binary fcc solid solution alloys, it may be an inherent solute effect, which needs further study. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
C1 [Otto, F.; Bei, H.; George, E. P.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Otto, F.; George, E. P.] Univ Tennessee, Mat Sci & Engn Dept, Knoxville, TN 37996 USA.
[Dlouhy, A.] Acad Sci Czech Republic, Inst Phys Mat, Brno 61662, Czech Republic.
[Somsen, Ch.; Eggeler, G.] Ruhr Univ Bochum, Inst Werkstoffe, D-44780 Bochum, Germany.
RP Otto, F (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
EM frederik.otto@rub.de
RI Dlouhy, Antonin/F-9721-2014; George, Easo/L-5434-2014; Eggeler,
Gunther/R-9833-2016;
OI Bei, Hongbin/0000-0003-0283-7990
FU US Department of Energy, Basic Energy Sciences, Materials Sciences and
Engineering Division; Alexander von Humboldt Foundation through a Feodor
Lynen Research Fellowship; IPM AS CR [RVO:68081723]
FX This research was supported by the US Department of Energy, Basic Energy
Sciences, Materials Sciences and Engineering Division. F.O. also
received funding from the Alexander von Humboldt Foundation through a
Feodor Lynen Research Fellowship. A.D. received financial support
through the IPM AS CR development program no. RVO:68081723.
NR 53
TC 195
Z9 201
U1 65
U2 357
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD SEP
PY 2013
VL 61
IS 15
BP 5743
EP 5755
DI 10.1016/j.actamat.2013.06.018
PG 13
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 210AK
UT WOS:000323801500019
ER
PT J
AU Liedahl, DA
Rubenchik, A
Libby, SB
Nikolaev, S
Phipps, CR
AF Liedahl, D. A.
Rubenchik, A.
Libby, S. B.
Nikolaev, S.
Phipps, C. R.
TI Pulsed laser interactions with space debris: Target shape effects
SO ADVANCES IN SPACE RESEARCH
LA English
DT Article
DE Laser ablation; Laser orbit modification
AB Among the approaches to the proposed mitigation and remediation of the space debris problem is the de-orbiting of objects in low Earth orbit through irradiation by ground-based high-intensity pulsed lasers. Laser ablation of a thin surface layer causes target recoil, resulting in the depletion of orbital angular momentum and accelerated atmospheric re-entry. However, both the magnitude and direction of the recoil are shape dependent, a feature of the laser-based remediation concept that has received little attention. Since the development of a predictive capability is desirable, we have investigated the dynamical response to ablation of objects comprising a variety of shapes. We derive and demonstrate a simple analytical technique for calculating the ablation-driven transfer of linear momentum, emphasizing cases for which the recoil is not exclusively parallel to the incident beam. For the purposes of comparison and contrast, we examine one case of momentum transfer in the low-intensity regime, where photon pressure is the dominant momentum transfer mechanism, showing that shape and orientation effects influence the target response in a similar, but not identical, manner. We address the related problem of target spin and, by way of a few simple examples, show how ablation can alter the spin state of a target, which often has a pronounced effect on the recoil dynamics. (C) 2013 COSPAR. Published by Elsevier Ltd. All rights reserved.
C1 [Liedahl, D. A.; Rubenchik, A.; Libby, S. B.; Nikolaev, S.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Liedahl, DA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM liedahl1@llnl.gov; rubenchik1@llnl.gov; libby1@llnl.gov;
nikolaev2@llnl.gov; crphipps@photonicassociates.com
FU U.S. Department of Energy, National Nuclear Security Administration
[DE-AC52-07NA27344]
FX The authors thank the referees for providing useful suggestions that
have helped to improve the clarity of the manuscript. Lawrence Livermore
National Laboratory is operated by Lawrence Livermore National Security,
LLC, for the U.S. Department of Energy, National Nuclear Security
Administration under Contract DE-AC52-07NA27344.
NR 29
TC 16
Z9 18
U1 2
U2 19
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0273-1177
J9 ADV SPACE RES
JI Adv. Space Res.
PD SEP 1
PY 2013
VL 52
IS 5
BP 895
EP 915
DI 10.1016/j.asr.2013.05.019
PG 21
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 210TN
UT WOS:000323857700011
ER
PT J
AU Klunder, GL
Plaue, JW
Spackman, PE
Grant, PM
Lindvall, RE
Hutcheon, ID
AF Klunder, Gregory L.
Plaue, Jonathan W.
Spackman, Paul E.
Grant, Patrick M.
Lindvall, Rachel E.
Hutcheon, Ian D.
TI Application of Visible/Near-Infrared Reflectance Spectroscopy to Uranium
Ore Concentrates for Nuclear Forensic Analysis and Attribution
SO APPLIED SPECTROSCOPY
LA English
DT Article
DE Near-infrared spectroscopy; Nuclear forensic analysis; Uranium ore
concentrate; Yellowcake; Ammonium uranates; Uranium speciation
ID X-RAY-DIFFRACTION; AMMONIUM URANATES; YELLOW CAKES; SPECTRA; OXIDES;
SPECTROMETRY; ORIGIN
AB Uranium ore concentrates (UOCs) are produced at mining facilities from the various types of uranium-bearing ores using several processes that can include different reagents, separation procedures, and drying conditions. The final UOC products can consist of different uranium species, which are important to identify to trace interdicted samples back to their origins. Color has been used as a simple indicator; however, visual determination is subjective and no chemical information is provided. In this work, we report the application of near-infrared (NIR) spectroscopy as a non-contact, non-destructive method to rapidly analyze UOC materials for species and/or process information. Diffuse reflectance spectra from 350 to 2500 nm were measured from a number UOC samples that were also characterized by X-ray diffraction. Combination and overtone bands were used to identify the amine and hydroxyl-containing species, such as ammonium uranates or ammonium uranyl carbonate, while other uranium oxide species (e.g., uranium trioxide [UO3] and triuranitum octoxide [U3O8]) exhibit absorption bands arising from crystal field effects and electronic transitions. Principal component analysis was used to classify the different UOC materials.
C1 [Klunder, Gregory L.; Plaue, Jonathan W.; Spackman, Paul E.; Grant, Patrick M.; Lindvall, Rachel E.; Hutcheon, Ian D.] Lawrence Livermore Natl Lab, Div Chem Sci, Livermore, CA 94551 USA.
RP Klunder, GL (reprint author), Lawrence Livermore Natl Lab, Div Chem Sci, POB 808,L-091, Livermore, CA 94551 USA.
EM klunder@llnl.gov
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; NNSA Office on Nonproliferation Verification
FX This work was performed under the auspices of the U.S. Department of
Energy by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344 and was supported by the NNSA Office on
Nonproliferation Verification. The authors greatly appreciate and
acknowledge the technical support of Mike Sharp, Sarah Roberts, Lars
Borg, and Martin Robel.
NR 32
TC 8
Z9 8
U1 1
U2 31
PU SOC APPLIED SPECTROSCOPY
PI FREDERICK
PA 5320 SPECTRUM DRIVE SUITE C, FREDERICK, MD 21703 USA
SN 0003-7028
J9 APPL SPECTROSC
JI Appl. Spectrosc.
PD SEP
PY 2013
VL 67
IS 9
BP 1049
EP 1056
DI 10.1366/12-06947
PG 8
WC Instruments & Instrumentation; Spectroscopy
SC Instruments & Instrumentation; Spectroscopy
GA 210CB
UT WOS:000323805800009
PM 24067636
ER
PT J
AU Manner, VW
Chellappa, RS
Sheffield, SA
Liu, ZX
Dattelbaum, DM
AF Manner, Virginia W.
Chellappa, Raja S.
Sheffield, Stephen A.
Liu, Zhenxian
Dattelbaum, Dana M.
TI High-Pressure Far-Infrared Spectroscopic Studies of Hydrogen Bonding in
Formic Acid
SO APPLIED SPECTROSCOPY
LA English
DT Article
DE Formic acid; Far infrared; Diamond anvil cell; High pressure; Hydrogen
bonding
ID HIGHER-ENERGY CONFORMER; X-RAY-DIFFRACTION; EXTREME CONDITIONS;
CRYSTAL-STRUCTURE; CARBOXYLIC ACIDS; ACETIC ACIDS; SOLID ARGON; SPECTRA;
MOLECULES; DIMER
AB Simple molecules such as HCOOH, or formic acid, are suggested to have played important roles in planetary physics due to their possibility for high pressure and temperature chemistry under impact conditions. In this study, we have investigated the effect of pressure (up to 50 GPa) on H-bonding and reactivity of formic acid using synchrotron far infrared spectroscopy. Based on the pressure-induced changes to H-bond nu(O-H center dot center dot center dot O) stretching and gamma(O-H center dot center dot center dot O) deformations, we observe significant reorganization of H-bonding network beginning at similar to 20 GPa. This is in good agreement with reports of symmetrization of H-bonds reported at 16-21 GPa from X-ray diffraction and Raman spectroscopy studies as well as molecular dynamics simulations. With further increase in pressure, beyond 35 GPa, formic acid undergoes a polymerization process that is complete beyond 45 GPa. Remarkably, upon decompression, the polymeric phase reverts to the crystalline high-pressure phase at 8 GPa.
C1 [Manner, Virginia W.; Chellappa, Raja S.; Sheffield, Stephen A.; Dattelbaum, Dana M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Liu, Zhenxian] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA.
RP Dattelbaum, DM (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM danadat@lanl.gov
FU U.S. Department of Energy [DE-AC52-06NA25396]; LANL LDRD program, LDRD
project [20110012DR]; Agnew National Security Fellowship and Campaign 2;
NSF [DMR0805056, EAR 06-49658]; DOE/NNSA [DE-FCO303N00144]; DOE/BES
[DE-AC02-98CH10886]
FX Los Alamos National Laboratory is operated by LANS, LLC, for the U.S.
Department of Energy under contract DE-AC52-06NA25396. Funding was
provided by the LANL LDRD program, LDRD project 20110012DR. VWM
acknowledges funding from the Agnew National Security Fellowship and
Campaign 2. The use of U2A beamline was supported by NSF (DMR0805056;
EAR 06-49658, COMPRES) and DOE/NNSA (DE-FCO303N00144, CDAC). NSLS
(National Synchrotron Light Source) is supported by the DOE/BES
(DE-AC02-98CH10886).
NR 61
TC 1
Z9 1
U1 4
U2 35
PU SOC APPLIED SPECTROSCOPY
PI FREDERICK
PA 5320 SPECTRUM DRIVE SUITE C, FREDERICK, MD 21703 USA
SN 0003-7028
J9 APPL SPECTROSC
JI Appl. Spectrosc.
PD SEP
PY 2013
VL 67
IS 9
BP 1080
EP 1086
DI 10.1366/13-07040
PG 7
WC Instruments & Instrumentation; Spectroscopy
SC Instruments & Instrumentation; Spectroscopy
GA 210CB
UT WOS:000323805800013
PM 24067640
ER
PT J
AU Jones, RW
Rathke, SJ
Laird, DA
McClelland, JF
AF Jones, Roger W.
Rathke, Samuel J.
Laird, David A.
McClelland, John F.
TI Real-Time Sensing of Soil Nitrate Concentration in the Parts per Million
Range While the Soil Is in Motion
SO APPLIED SPECTROSCOPY
LA English
DT Article
DE Soil nitrate; Transient infrared spectroscopy; Photoacoustic
spectroscopy; PAS; Diffuse reflectance; DRIFTS
ID TRANSIENT INFRARED-SPECTROSCOPY; PARTIAL LEAST-SQUARES; MIDINFRARED
SPECTROSCOPY; REFLECTANCE SPECTROSCOPY; IDENTIFICATION; REGRESSION;
ARRAY
AB Reactive nitrogen (Nr) is a term used to describe non-nitrogen gas (non-N-2) forms of nitrogen (N) in the biosphere. It causes major pollution problems when it occurs in excess, and it has many sources, including fertilizers used in production agriculture. Currently there is no on-the-go soil nitrate sensor that could guide the application of the optimal amount of fertilizer, which often varies significantly within a field. We report for the first time nitrate-in-soil measurements performed on moving soil samples at concentration levels relevant for fertilizer application. An infrared emission technique called transient infrared spectroscopy (TIRS) was tested on soil samples spiked with different nitrate concentrations in the parts-per-million range and moving at a velocity of 2.6 m/s (5.8 miles per hour) in the laboratory. The TIRS Fourier transform infrared (FT-IR) spectra were modeled by partial least squares and produced a standard error of cross-validation (SECV) of 6.3 parts per million (ppm) N and an R-2 of 0.938 for 512-scan spectra. These results are compared to those using fewer TIRS scans and to those from photoacoustic spectroscopy (PAS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) measurements on stationary samples. TIRS 128-, 32-, and 8-scan spectra yielded SEC Vs of 11.2, 11.4, and 18.4 ppm N and R-2 values of 0.800, 0.831, and 0.583, respectively. The PAS and DRIFTS measurements produced SECVs of 12.4 and 9.0 ppm N and R-2 values of 0.766 and 0.876, respectively.
C1 [Jones, Roger W.; McClelland, John F.] Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
[Rathke, Samuel J.; Laird, David A.] Iowa State Univ, Dept Agron, Ames, IA 50011 USA.
[McClelland, John F.] Iowa State Univ, Dept Mech Engn, Ames, IA 50011 USA.
RP McClelland, JF (reprint author), Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
EM mcclelland.john7@gmail.com
RI Laird, David/E-8598-2014
FU U.S. Department of Energy by Iowa State University [DE-AC02-07CH11358]
FX This research was performed at the Ames Laboratory. Ames Laboratory is
operated for the U.S. Department of Energy by Iowa State University
under contract no. DE-AC02-07CH11358.
NR 29
TC 2
Z9 2
U1 0
U2 22
PU SOC APPLIED SPECTROSCOPY
PI FREDERICK
PA 5320 SPECTRUM DRIVE SUITE C, FREDERICK, MD 21703 USA
SN 0003-7028
J9 APPL SPECTROSC
JI Appl. Spectrosc.
PD SEP
PY 2013
VL 67
IS 9
BP 1106
EP 1110
DI 10.1366/13-07064
PG 5
WC Instruments & Instrumentation; Spectroscopy
SC Instruments & Instrumentation; Spectroscopy
GA 210CB
UT WOS:000323805800017
PM 24067644
ER
PT J
AU Lam, PS
Lam, PY
Sokhansanj, S
Bi, XTT
Lim, CJ
AF Lam, Pak Sui
Lam, Pak Yiu
Sokhansanj, Shahab
Bi, Xiaotao T.
Lim, C. J.
TI Mechanical and compositional characteristics of steam-treated Douglas
fir (Pseudotsuga menziesii L.) during pelletization
SO BIOMASS & BIOENERGY
LA English
DT Article
DE Steam treatment; Wood pellet; Asymptotic modulus; Stress relaxation;
Hardness; Binding
ID MOISTURE-CONTENT; FUEL PELLETS; BIOMASS; TEMPERATURE; WOOD;
TORREFACTION; PRETREATMENT; RELAXATION; COMPACTION; SOFTWOOD
AB Rheological properties of pelletizing steam-treated Douglas fir at four different severities were investigated. Steam-treated wood pellets exhibited three compression regions that became more distinct with increasing treatment severity. Hydrolysis of hemicelluloses and condensations of lignin led to an increase in elasticity of pellets made from steam treated feedstock. The increased treatment duration improved the dimensional stability of pellets. The increase in particle surface roughness and concentration of mono-sugars and extractives contributed to the increase in required energy for extruding steam treated pellets from the die. The maximum breaking force, Meyer hardness and the hardness modulus increased with steam treatment. The increased hardness and dimensional stability of steam-treated pellets can be attributed to the binding role of mono-sugars released from Douglas fir during steam treatment. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Lam, Pak Sui; Lam, Pak Yiu; Sokhansanj, Shahab; Bi, Xiaotao T.; Lim, C. J.] Univ British Columbia, Dept Chem & Biol Engn, Vancouver, BC V6T 1Z3, Canada.
[Sokhansanj, Shahab] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Lam, PS (reprint author), Univ British Columbia, Dept Chem & Biol Engn, 2360 East Mall, Vancouver, BC V6T 1Z3, Canada.
EM wilsonlam82@yahoo.com
FU Natural Science and Engineering Research Council of Canada (NSERC); Wood
Pellet Association of Canada; B.C. Ministry of Forest and Range;
Agricultural Biorefining Innovative Network; U.S. Department of Energy's
Office of Biomass Program
FX The author would like to acknowledge Professor Jack Saddler and his
research group of Forest Biotechnology Group in University of British
Columbia for the technical support of the analysis of the biomass's
chemical composition. The author would like to acknowledge Mr. Jeff Hoi
for the help of the pelletization's experiment. The author would also
like to acknowledge the financial support in part by the Natural Science
and Engineering Research Council of Canada (NSERC), Wood Pellet
Association of Canada, B.C. Ministry of Forest and Range and
Agricultural Biorefining Innovative Network. The U.S. Department of
Energy's Office of Biomass Program funded and supported the off-site
research at the University of British Columbia.
NR 39
TC 10
Z9 10
U1 2
U2 18
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0961-9534
J9 BIOMASS BIOENERG
JI Biomass Bioenerg.
PD SEP
PY 2013
VL 56
BP 116
EP 126
DI 10.1016/j.biombioe.2013.05.001
PG 11
WC Agricultural Engineering; Biotechnology & Applied Microbiology; Energy &
Fuels
SC Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels
GA 210BR
UT WOS:000323804800015
ER
PT J
AU Asdrubali, F
Baldassarri, C
Fthenakis, V
AF Asdrubali, Francesco
Baldassarri, Catia
Fthenakis, Vasilis
TI Life cycle analysis in the construction sector: Guiding the optimization
of conventional Italian buildings
SO ENERGY AND BUILDINGS
LA English
DT Article
DE Life Cycle Assessment; Buildings; Energy optimization; LCA; Environment
ID ENVIRONMENTAL PERFORMANCE; EMBODIED ENERGY; SPAIN; DWELLINGS; CARBON;
NEED
AB Life Cycle Assessment (LCA) is a widely known methodology for "cradle to grave" investigation of the environmental impacts of products and technological lifecycles; however, this methodology has not been yet broadly used as an eco-design tool among the practitioners of the building sector. We applied LCA on three conventional Italian buildings - a detached residential house, a multi-family and a multi-story office building. Our analysis includes all the life stages, from the production of the construction materials, to their transportation, assembling, lighting, appliances, cooling- and heating-usages during the operating phase, to the end of life of all the materials and components. We found that the operation phase has the greatest contribution to the total impact (from 77% of that of the detached house, up to 85% of the office building), whereas the impact of the construction phase ranges from about 14% (office building) to 21% (detached house). We carried further analyses to evaluate the influence of various optimizations of the buildings, e.g., more efficient envelopes and facilities, on the entire life cycle of the three buildings. In addition, we propose a methodological approach, which can contribute to the acceptance of LCA as a tool in the eco-friendly design of buildings, especially those buildings whose impact during the construction phase needs to be carefully checked, such as Nearly Zero Energy Buildings. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Asdrubali, Francesco; Baldassarri, Catia] Univ Perugia, Dept Ind Engn, I-06125 Perugia, Italy.
[Fthenakis, Vasilis] Brookhaven Natl Lab, New York, NY USA.
[Fthenakis, Vasilis] Columbia Univ, New York, NY USA.
RP Asdrubali, F (reprint author), Univ Perugia, Dept Ind Engn, Via G Duranti 67, I-06125 Perugia, Italy.
EM fasdruba@unipg.it
RI Asdrubali, Francesco/N-4690-2015
OI Asdrubali, Francesco/0000-0003-1943-7547
FU Italian Ministry for Education and Research
FX The study was carried out within the national research project FISR
"GENIUS LOCI - The role of the building sector on climate change",
funded by the Italian Ministry for Education and Research to Perugia
University.
NR 47
TC 55
Z9 55
U1 3
U2 49
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0378-7788
J9 ENERG BUILDINGS
JI Energy Build.
PD SEP
PY 2013
VL 64
BP 73
EP 89
DI 10.1016/j.enbuild.2013.04.018
PG 17
WC Construction & Building Technology; Energy & Fuels; Engineering, Civil
SC Construction & Building Technology; Energy & Fuels; Engineering
GA 207UC
UT WOS:000323629100009
ER
PT J
AU Lumsdaine, A
AF Lumsdaine, Arnold
TI Fusion Science and Technology PREFACE
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Editorial Material
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Lumsdaine, A (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
NR 0
TC 0
Z9 0
U1 4
U2 7
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP V
EP V
PG 1
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800001
ER
PT J
AU Yang, HL
Kwak, JG
Oh, YK
Park, KR
Kim, WC
Lee, SG
Kim, JY
Bae, YS
Park, YM
Kim, HK
Chu, Y
Park, MK
Kim, JS
In, SR
Joung, SH
Choe, WH
Park, HK
Hwang, YS
Na, YS
Park, JG
Ahn, JW
Park, YS
Kwon, M
Leuer, JA
Eidietis, NW
Hyatt, AW
Walker, M
Gorelov, Y
Lohr, J
Mueller, D
Grisham, LR
Sabbagh, SA
Watanabe, K
Inoue, T
Sakamoto, K
Oda, Y
Kajiwara, K
Ellis, R
Hosea, J
Delpech, L
Hoang, TT
Litaudon, X
Namkung, W
Cho, MH
AF Yang, H. L.
Kwak, J. G.
Oh, Y. K.
Park, K. R.
Kim, W. C.
Lee, S. G.
Kim, J. Y.
Bae, Y. S.
Park, Y. M.
Kim, H. K.
Chu, Y.
Park, M. K.
Kim, J. S.
In, S. R.
Joung, S. H.
Choe, W. H.
Park, H. K.
Hwang, Y. S.
Na, Y. S.
Park, J. G.
Ahn, J. W.
Park, Y. S.
Kwon, M.
Leuer, J. A.
Eidietis, N. W.
Hyatt, A. W.
Walker, M.
Gorelov, Y.
Lohr, J.
Mueller, D.
Grisham, L. R.
Sabbagh, S. A.
Watanabe, K.
Inoue, T.
Sakamoto, K.
Oda, Y.
Kajiwara, K.
Ellis, R.
Hosea, J.
Delpech, L.
Hoang, T. T.
Litaudon, X.
Namkung, W.
Cho, M. H.
CA KSTAR Team
TI OVERVIEW OF KSTAR RESULTS IN PHASE-I OPERATION
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 20th American-Nuclear-Society (ANS) Topical Meeting on the Technology of
Fusion Energy (TOFE)
CY AUG 27-31, 2012
CL Nashville, TN
SP Amer Nucl Soc (ANS), Oak Ridge Natl Lab, US ITER, Lawrence Livermore Natl Lab, Princeton Plasma Phys Lab, Naval Res Lab, Atom Energy Soc Japan, Canadian Nucl Soc, Inst Elect & Elect Engineers
ID TOKAMAK
AB The KSTAR (Korea Superconducting Tokamak Advanced Research) pursued to develop key technologies for superconducting tokamak operation and to contribute to a few research items for ITER relevant issues. As a result, the KSTAR achieved highly confined mode (H-mode) in 2010 campaign and successfully demonstrated suppression of Edge Localized Mode (ELM) using n=1 Resonant Magnetic Perturbation (RMP) coils. The KSTAR is also initiating machine performance based on the designed machine parameters. The plasma current we achieved was I MA, and longest plasma pulse length has been extended to 10 s. In spite of limited heating power to 3.5 MW, several key actuators satisfactorily supported to implement a few scientific researches such as ELM control. On the basis of big progress in both the plasma performance and the experimental results, the KSTAR operation will explore key scientific and technical research issues under steady state operation condition in phase-2 operation.
C1 [Yang, H. L.; Kwak, J. G.; Oh, Y. K.; Park, K. R.; Kim, W. C.; Lee, S. G.; Kim, J. Y.; Bae, Y. S.; Park, Y. M.; Kim, H. K.; Chu, Y.; Park, M. K.; Kim, J. S.; Kwon, M.] Natl Fus Res Inst, Taejon 305333, South Korea.
[In, S. R.; Joung, S. H.] Korea Atom Energy Res Insititute, Taejon 305333, South Korea.
[Choe, W. H.] Korea Adv Inst Sci & Technol, Taejon 305701, South Korea.
[Park, H. K.; Namkung, W.; Cho, M. H.] Pohang Univ Sci & Technol, Pohang 790784, Gyungbuk, South Korea.
[Hwang, Y. S.; Na, Y. S.] Seoul Natl Univ, Seoul 151742, South Korea.
[Park, J. G.; Mueller, D.; Grisham, L. R.; Ellis, R.; Hosea, J.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Ahn, J. W.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Leuer, J. A.; Eidietis, N. W.; Hyatt, A. W.; Walker, M.; Gorelov, Y.; Lohr, J.] Gen Atom Co, San Diego, CA 92121 USA.
[Park, Y. S.; Sabbagh, S. A.] Columbia Univ, Princeton, NJ 08543 USA.
[Watanabe, K.; Inoue, T.; Sakamoto, K.; Oda, Y.; Kajiwara, K.] Japan Atom Energy Agcy, Naka, Ibaraki 3110193, Japan.
[Delpech, L.; Hoang, T. T.; Litaudon, X.] CEA, IFRM, F-13108 St Paul Les Durance, France.
RP Yang, HL (reprint author), Natl Fus Res Inst, 113 Gwahangno, Taejon 305333, South Korea.
EM hlyang@nfri.re.kr
RI Choe, Wonho/C-1556-2011;
OI Walker, Michael/0000-0002-4341-994X
NR 19
TC 2
Z9 2
U1 0
U2 13
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP 407
EP 416
PG 10
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800004
ER
PT J
AU Kessel, CE
Tillack, MS
Blanchard, JP
AF Kessel, C. E.
Tillack, M. S.
Blanchard, J. P.
TI THE EVALUATION OF THE HEAT LOADING FROM STEADY, TRANSIENT AND OFF-NORMAL
CONDITIONS IN ARIES POWER PLANTS
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 20th American-Nuclear-Society (ANS) Topical Meeting on the Technology of
Fusion Energy (TOFE)
CY AUG 27-31, 2012
CL Nashville, TN
SP Amer Nucl Soc (ANS), Oak Ridge Natl Lab, US ITER, Lawrence Livermore Natl Lab, Princeton Plasma Phys Lab, Naval Res Lab, Atom Energy Soc Japan, Canadian Nucl Soc, Inst Elect & Elect Engineers
ID PLASMA-FACING COMPONENTS; PARTICLE LOSSES; 1ST WALL; I ELMS; H-MODE;
ENERGY; ITER; DISRUPTIONS; DIVERTOR; JET
AB The heat loading on plasma facing components (PFCs) provides a critical limitation for design and operation of the first wall, divertor, and other special components. Power plants will have high power entering the scrape-off layer and transporting to the first wall and divertor. Although the engineering design for steady heat loads is understood, characterizing the steady heat load and the approach for transient and off-normal loading is not. The characterization of heat loads developed for ITER can be applied to power plants to better develop the operating space of viable solutions and point to research focus areas.
C1 [Kessel, C. E.] Princeton Plasma Phys Lab, Princeton, NJ 08534 USA.
[Tillack, M. S.] Univ Calif San Diego, La Jolla, CA 92093 USA.
[Blanchard, J. P.] Univ Wisconsin, Madison, WI 53706 USA.
RP Kessel, CE (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08534 USA.
EM ckessel@pppl.gov
NR 42
TC 7
Z9 7
U1 0
U2 4
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP 440
EP 448
PG 9
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800008
ER
PT J
AU El-Guebaly, L
Huhn, T
Rowcliffe, A
Malang, S
AF El-Guebaly, L.
Huhn, T.
Rowcliffe, A.
Malang, S.
CA ARIES-ACT Team
TI DESIGN CHALLENGES AND ACTIVATION CONCERNS FOR ARIES VACUUM VESSEL
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 20th American-Nuclear-Society (ANS) Topical Meeting on the Technology of
Fusion Energy (TOFE)
CY AUG 27-31, 2012
CL Nashville, TN
SP Amer Nucl Soc (ANS), Oak Ridge Natl Lab, US ITER, Lawrence Livermore Natl Lab, Princeton Plasma Phys Lab, Naval Res Lab, Atom Energy Soc Japan, Canadian Nucl Soc, Inst Elect & Elect Engineers
ID STEELS
AB Research has been conducted to find the optimal steel to use in the vacuum vessel (VV) of ARIES power plants. The VV should meet several design criteria, including activation and fabrication requirements. Seven different types of steel were examined in order to determine which steel would be the best candidate for the ARIES VV. The main concerns are related to activation, properties under irradiation, and fabrication of a sizable VV. Steels generating high-level waste (such as 316-SS) were excluded from possible material choices. As a VV material, there is the necessity for a carefully controlled the post-weld-heat-treatment at similar to 750 degrees C after assembly, welding, and rewelding. For this particular reason, the F82H FS is not suitable for the ARIES VV. The newly developed 3Cr-3WV bainitic FS meets the activation requirements and has the potential to satisfy the fabrication requirements for the ARIES VV. It is recommended for further consideration because of several advantages over other candidate steels.
C1 [El-Guebaly, L.; Huhn, T.] Univ Wisconsin, Madison, WI 53706 USA.
[Rowcliffe, A.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP El-Guebaly, L (reprint author), Univ Wisconsin, 1500 Engn Dr, Madison, WI 53706 USA.
EM elguebaly@engr.wisc.edu; afrowcliffe@atlanticbb.net; smalang@web.de
NR 13
TC 7
Z9 7
U1 1
U2 7
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP 449
EP 454
PG 6
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800009
ER
PT J
AU Neilson, GH
Brown, TG
Gates, DA
Kessel, CE
Menard, JE
Prager, SC
Scott, SD
Wilson, JR
Zarnstorff, MC
AF Neilson, G. H.
Brown, T. G.
Gates, D. A.
Kessel, C. E.
Menard, J. E.
Prager, S. C.
Scott, S. D.
Wilson, J. R.
Zarnstorff, M. C.
TI MISSION AND READINESS ASSESSMENT FOR FUSION NUCLEAR FACILITIES
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 20th American-Nuclear-Society (ANS) Topical Meeting on the Technology of
Fusion Energy (TOFE)
CY AUG 27-31, 2012
CL Nashville, TN
SP Amer Nucl Soc (ANS), Oak Ridge Natl Lab, US ITER, Lawrence Livermore Natl Lab, Princeton Plasma Phys Lab, Naval Res Lab, Atom Energy Soc Japan, Canadian Nucl Soc, Inst Elect & Elect Engineers
ID POWER-PLANT; TOKAMAK
AB Magnetic fusion development toward DEMO will most likely require a number of fusion nuclear facilities (FNF), intermediate between ITER and DEMO, to test and validate plasma and nuclear technologies and to advance the level of system integration. The FNF mission space is wide, ranging from basic materials research to net electricity demonstration, so there is correspondingly a choice among machine options, scope, and risk in planning such a step. Readiness requirements to proceed with a DEMO are examined, and two FNF options are assessed in terms of the contributions they would make to closing DEMO readiness gaps, and their readiness to themselves proceed with engineering design about ten years from now. An advanced tokamak (AT) pilot plant with superconducting coils and a mission to demonstrate net electricity generation would go a long way toward DEMO. As a next step, however, a pilot plant would entail greater risk than a copper-coil FNSF-AT with its more focussed mission and technology requirements. The stellarator path to DEMO is briefly discussed. Regardless of the choice of FNF option, an accompanying science and technology development program, also aimed at DEMO readiness, is absolutely essential.
C1 [Neilson, G. H.; Brown, T. G.; Gates, D. A.; Kessel, C. E.; Menard, J. E.; Prager, S. C.; Scott, S. D.; Wilson, J. R.; Zarnstorff, M. C.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Neilson, GH (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM hneilson@pppl.gov
OI Menard, Jonathan/0000-0003-1292-3286
NR 15
TC 0
Z9 0
U1 0
U2 10
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP 463
EP 472
PG 10
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800011
ER
PT J
AU Zolfaghari, A
Brooks, A
Michaels, A
Hanson, J
Hartwell, G
AF Zolfaghari, A.
Brooks, A.
Michaels, A.
Hanson, J.
Hartwell, G.
TI CALCULATION OF EDDY CURRENTS IN THE CTH VACUUM VESSEL AND COIL FRAME FOR
USE IN MHD EQUILIBRIUM RECONSTRUCTION OF THE PLASMA DISCHARGE
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 20th American-Nuclear-Society (ANS) Topical Meeting on the Technology of
Fusion Energy (TOFE)
CY AUG 27-31, 2012
CL Nashville, TN
SP Amer Nucl Soc (ANS), Oak Ridge Natl Lab, US ITER, Lawrence Livermore Natl Lab, Princeton Plasma Phys Lab, Naval Res Lab, Atom Energy Soc Japan, Canadian Nucl Soc, Inst Elect & Elect Engineers
AB Knowledge of eddy currents in the vacuum vessel walls and nearby conducting support structures can significantly contribute to the accuracy of Magnetohydrodynamics (MHD) equilibrium reconstruction in toroidal plasmas. Moreover, the magnetic fields produced by the eddy currents could generate error fields that may give rise to islands at rational surfaces or cause field lines to become chaotic. In the Compact Toroidal Hybrid (CTH) device (R0 = 0.75 m, a = 0.29 m, B <= 0.7 T), the primary driver of the eddy currents during the plasma discharge is the changing flux of the ohmic heating transformer. Electromagnetic simulations are used to calculate eddy current paths and profile in the vacuum vessel and in the coil frame pieces with known time dependent currents in the ohmic heating coils. MAXWELL and SPARK codes were used for the Electromagnetic modeling and simulation. MAXWELL code was used for detailed 3D finite-element analysis of the eddy currents in the structures. SPARK code was used to calculate the eddy currents in the structures as modeled with shell/surface elements, with each element representing a current loop. In both cases current filaments representing the eddy currents were prepared for input into VMEC code for MHD equilibrium reconstruction of the plasma discharge.
C1 [Zolfaghari, A.; Brooks, A.; Michaels, A.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA.
[Hanson, J.; Hartwell, G.] Auburn Univ, Auburn, AL 36849 USA.
RP Zolfaghari, A (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM azolfagh@pppl.gov
NR 3
TC 2
Z9 2
U1 0
U2 4
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP 498
EP 501
PG 4
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800016
ER
PT J
AU Combs, SK
Foust, CR
McGill, JM
Caughman, JBO
McCarthy, KJ
Baylor, LR
Chamorro, M
Fehling, DT
Garcia, R
Harris, JH
Sanchez, JH
Hidalgo, C
Meitner, SJ
Rasmussen, DA
Unamuno, R
AF Combs, S. K.
Foust, C. R.
McGill, J. M.
Caughman, J. B. O.
McCarthy, K. J.
Baylor, L. R.
Chamorro, M.
Fehling, D. T.
Garcia, R.
Harris, J. H.
Hernandez Sanchez, J.
Hidalgo, C.
Meitner, S. J.
Rasmussen, D. A.
Unamuno, R.
TI RESULTS FROM LABORATORY TESTING OF A NEW FOUR-BARREL PELLET INJECTOR FOR
THE TJ-II STELLARATOR
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 20th American-Nuclear-Society (ANS) Topical Meeting on the Technology of
Fusion Energy (TOFE)
CY AUG 27-31, 2012
CL Nashville, TN
SP Amer Nucl Soc (ANS), Oak Ridge Natl Lab, US ITER, Lawrence Livermore Natl Lab, Princeton Plasma Phys Lab, Naval Res Lab, Atom Energy Soc Japan, Canadian Nucl Soc, Inst Elect & Elect Engineers
ID MST
AB A compact pellet injector has been built/tested at Oak Ridge National Laboratory (ORNL) for the TJ-II stellarator. The design is an upgraded version of that used for the ORNL injector installed on the Madison Symmetric Torus (MST). It is a four-barrel system equipped with a cryogenic refrigerator for in situ hydrogen pellet formation, a propellant valve system for pellet acceleration (speeds similar to 1000 m/s), pellet diagnostics, and an injection line. On TJ-II, it will be used as an active diagnostic and for fueling. To accommodate the plasma experiments planned for TJ-II, pellet sizes significantly smaller than those used for the MST application are required The system has been initially equipped with four pellet sizes, with the gun barrel bores ranging between 0.4 and 1.0 mm. The most challenging technical issue is achieving reliable operation with the smallest pellet size. The system is described, highlighting the new features added since the original MST injector was constructed Results from laboratory testing are presented and discussed, including the range of pellet sizes and speeds that will be available for initial experiments on and the expected reliability of delivering intact pellets to the plasmas.
C1 [Combs, S. K.; Foust, C. R.; McGill, J. M.; Caughman, J. B. O.; Baylor, L. R.; Fehling, D. T.; Harris, J. H.; Meitner, S. J.; Rasmussen, D. A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[McCarthy, K. J.; Chamorro, M.; Garcia, R.; Hernandez Sanchez, J.; Hidalgo, C.; Unamuno, R.] CIEMAT, Lab Nacl Fus, E-28040 Madrid, Spain.
RP Combs, SK (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM combssk@ornl.gov; kieran.mccarthy@ciemat.es
RI Caughman, John/R-4889-2016; Hidalgo, Carlos/H-6109-2015
OI Caughman, John/0000-0002-0609-1164;
NR 18
TC 3
Z9 3
U1 2
U2 5
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
EI 1943-7641
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP 513
EP 520
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800018
ER
PT J
AU Diem, SJ
Fehling, DT
Hillis, DL
Horton, AR
Nagy, A
Pinsker, RI
Unterberg, EA
AF Diem, S. J.
Fehling, D. T.
Hillis, D. L.
Horton, A. R.
Nagy, A.
Pinsker, R. I.
Unterberg, E. A.
TI INITIAL TESTING OF OPTICAL ARC DETECTOR INSIDE 285/300 FAST WAVE ANTENNA
BOX ON DIII-D
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 20th American-Nuclear-Society (ANS) Topical Meeting on the Technology of
Fusion Energy (TOFE)
CY AUG 27-31, 2012
CL Nashville, TN
SP Amer Nucl Soc (ANS), Oak Ridge Natl Lab, US ITER, Lawrence Livermore Natl Lab, Princeton Plasma Phys Lab, Naval Res Lab, Atom Energy Soc Japan, Canadian Nucl Soc, Inst Elect & Elect Engineers
AB Locating arcs within the fast wave current drive system is necessary to improve antenna performance and coupling to the plasma. Previously, there had been no way to observe arcs inside the vacuum vessel in an ICRF antenna on DIII-D. A new diagnostic that uses photomultiplier tubes has been installed for the 2012 run campaign on the 285/300 antenna of the fast wave system. The diagnostic has top and bottom views of the back of the four antenna straps and uses narrow-bandpass visible filters to isolate emission lines of copper (577 nm) and deuterium (656.1 nm). This diagnostic is based on the ORNL filterscope system currently in use on multiple devices. The system will be used to guide fast wave antenna conditioning, plasma operation and provide insight into future antenna upgrades on DIII-D.
C1 [Diem, S. J.; Fehling, D. T.; Hillis, D. L.; Horton, A. R.; Unterberg, E. A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Nagy, A.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Pinsker, R. I.] Gen Atom Co, San Diego, CA 92121 USA.
RP Diem, SJ (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM diemsj@ornl.gov
RI Unterberg, Ezekial/F-5240-2016
OI Unterberg, Ezekial/0000-0003-1353-8865
NR 5
TC 0
Z9 0
U1 0
U2 2
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP 530
EP 532
PG 3
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800021
ER
PT J
AU Sawan, ME
Bohm, TD
Ulrickson, MA
AF Sawan, M. E.
Bohm, T. D.
Ulrickson, M. A.
TI NEUTRONICS ANALYSIS OF ITER BLANKET MODULES WITH IMPACT ON VACUUM VESSEL
SHIELDING
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 20th American-Nuclear-Society (ANS) Topical Meeting on the Technology of
Fusion Energy (TOFE)
CY AUG 27-31, 2012
CL Nashville, TN
SP Amer Nucl Soc (ANS), Oak Ridge Natl Lab, US ITER, Lawrence Livermore Natl Lab, Princeton Plasma Phys Lab, Naval Res Lab, Atom Energy Soc Japan, Canadian Nucl Soc, Inst Elect & Elect Engineers
AB Detailed profiles of nuclear heating and radiation damage parameters were determined in ITER blanket modules at different poloidal locations. The results indicate that the nuclear parameters are sensitive to the configuration and material composition. Nuclear analysis was performed for several sections with cutouts in the back of the blanket modules for manifolds, inter-modular keys, and in-vessel coils to assess the impact on vacuum vessel shielding.
C1 [Sawan, M. E.; Bohm, T. D.] Univ Wisconsin, Madison, WI 53706 USA.
[Ulrickson, M. A.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Sawan, ME (reprint author), Univ Wisconsin, Madison, WI 53706 USA.
EM sawan@engr.wisc.edu
NR 9
TC 0
Z9 0
U1 1
U2 5
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP 555
EP 562
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800026
ER
PT J
AU Youssef, MZ
Feder, R
AF Youssef, Mahmoud Z.
Feder, Russell
TI SUMMARY OF THE UP-TO-DATE 3-D NUCLEAR ANALYSES OF ITER DIAGNOSTICS
GENERIC EQUATORIAL PORT PLUG (GEPP) PERFORMED WITH THE ATTILA DESIGN
CODE
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 20th American-Nuclear-Society (ANS) Topical Meeting on the Technology of
Fusion Energy (TOFE)
CY AUG 27-31, 2012
CL Nashville, TN
SP Amer Nucl Soc (ANS), Oak Ridge Natl Lab, US ITER, Lawrence Livermore Natl Lab, Princeton Plasma Phys Lab, Naval Res Lab, Atom Energy Soc Japan, Canadian Nucl Soc, Inst Elect & Elect Engineers
ID NEUTRONICS ANALYSIS
AB The upper, equatorial, and lower diagnostics port plugs in ITER will include numerous intermingling labyrinths and many streaming paths whose impact should be carefully studied For this purpose, the 3-D Discrete Ordinates code, Attila, has been routinely used by PPPL/UCLA to assess the nuclear field in these geometrically complex plugs both during operation and after shutdown. In this paper we describe the calculation procedure followed and the input parameters/assumptions applied to assess the shutdown dose rates (SDDR) everywhere with emphasize on their values inside the generic equatorial port plug (GEPP) and its inter-space extension area. Factors inherent in the Discrete Ordinates method that impact the accuracy of the results (e.g. quadrature sets used, boundary conditions applied, etc.) are discussed Means to minimize streaming through straight gaps and open channels present in the GEPP are presented in this paper, along with an examination of their effectiveness in reducing the SDDR in the port inter-space area.
C1 [Youssef, Mahmoud Z.] Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
[Feder, Russell] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Youssef, MZ (reprint author), Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
EM youssef@fusion.ucla.edu; rfeder@pppl.gov
NR 19
TC 3
Z9 3
U1 0
U2 2
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP 571
EP 581
PG 11
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800028
ER
PT J
AU Wong, CPC
Abdou, M
Katoh, Y
Kurtz, RJ
Lumsdaine, A
Marriott, E
Merrill, B
Morley, N
Pint, BA
Sawan, ME
Smolentsev, S
Williams, B
Willms, RS
Youssef, M
AF Wong, C. P. C.
Abdou, M.
Katoh, Y.
Kurtz, R. J.
Lumsdaine, A.
Marriott, E.
Merrill, B.
Morley, N.
Pint, B. A.
Sawan, M. E.
Smolentsev, S.
Williams, B.
Willms, R. S.
Youssef, M.
TI PROGRESS ON DCLL BLANKET CONCEPT
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 20th American-Nuclear-Society (ANS) Topical Meeting on the Technology of
Fusion Energy (TOFE)
CY AUG 27-31, 2012
CL Nashville, TN
SP Amer Nucl Soc (ANS), Oak Ridge Natl Lab, US ITER, Lawrence Livermore Natl Lab, Princeton Plasma Phys Lab, Naval Res Lab, Atom Energy Soc Japan, Canadian Nucl Soc, Inst Elect & Elect Engineers
ID CORROSION BEHAVIOR; PB-17LI; DESIGN; EXTRACTION; STEELS; ITER
AB Under the US Fusion Nuclear Science and Technology Development program, we have selected the Dual Coolant Lead Lithium concept (DCLL) as a reference blanket, which has the potential to be a high performance DEMO blanket design with a projected thermal efficiency of >40%. Reduced activation ferritic/martensitic (RAF/M) steel is used as the structural material. The self-cooled breeder PbLi is circulated for power conversion and for tritium breeding. A SiC-based flow channel insert (FCI) is used as a means for magnetohydrodynamic pressure drop reduction from the circulating liquid PbLi and as a thermal insulator to separate the high-temperature PbLi (similar to 700 degrees C) from the helium-cooled RAF/M steel structure. We are making progress on related R&D needs to address critical Fusion Nuclear Science and Facility (FNSF) and DEMO blanket development issues. While performing the function as the Interface Coordinator for the DCLL blanket concept, we were developing the mechanical design and performing neutronics, structural and thermal hydraulics analyses of the DCLL TBM module. We estimated the necessary ancillary equipment that will be needed at the ITER site, and a detailed safety impact report was prepared. This provided additional understanding of the DCLL blanket concept in preparation for the FNSF and DEMO. This paper is a summary report on the progress of the DCLL TBM design and R&D for the DCLL blanket concept.
C1 [Wong, C. P. C.] Gen Atom Co, San Diego, CA 92186 USA.
[Abdou, M.; Morley, N.; Smolentsev, S.; Youssef, M.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[Katoh, Y.; Lumsdaine, A.; Pint, B. A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Kurtz, R. J.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Marriott, E.; Sawan, M. E.] Univ Wisconsin, Madison, WI 53706 USA.
[Merrill, B.] Idaho Natl Lab, Idaho Falls, ID 83515 USA.
[Williams, B.] Ultramet Inc, Pacoima, CA 91331 USA.
[Willms, R. S.] ITER Org, Cadarache, France.
RP Wong, CPC (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA.
EM wongc@fusion.gat.com
RI Pint, Bruce/A-8435-2008
OI Pint, Bruce/0000-0002-9165-3335
NR 31
TC 5
Z9 5
U1 0
U2 9
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP 623
EP 630
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800035
ER
PT J
AU Brown, T
Costley, AE
Goldston, RJ
El-Guebaly, L
Kessel, C
Neilson, GH
Malang, S
Menard, JE
Prager, S
Waganer, L
Titus, P
Zarnstorff, M
AF Brown, T.
Costley, A. E.
Goldston, R. J.
El-Guebaly, L.
Kessel, C.
Neilson, G. H.
Malang, S.
Menard, J. E.
Prager, S.
Waganer, L.
Titus, P.
Zarnstorff, M.
TI COMPARISON OF OPTIONS FOR A PILOT PLANT FUSION NUCLEAR MISSION
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 20th American-Nuclear-Society (ANS) Topical Meeting on the Technology of
Fusion Energy (TOFE)
CY AUG 27-31, 2012
CL Nashville, TN
SP Amer Nucl Soc (ANS), Oak Ridge Natl Lab, US ITER, Lawrence Livermore Natl Lab, Princeton Plasma Phys Lab, Naval Res Lab, Atom Energy Soc Japan, Canadian Nucl Soc, Inst Elect & Elect Engineers
ID POWER-PLANT; ARIES-ST; TOKAMAK
AB A fusion pilot plant study was initiated to clarify the development needs in moving from ITER to a first of a kind fusion power plant, following a path similar to the approach adopted for the commercialization of fission. The pilot plant mission encompassed component test and fusion nuclear science missions plus the requirement to produce net electricity with high availability in a device designed to be prototypical of the commercial device. Three magnetic configuration options were developed around this mission: the advanced tokamak (AT), spherical tokamak (ST) and compact stellarator (CS).
With the completion of the study and separate documentation of each design option a question can now be posed; how do the different designs compare with each other as candidates for meeting the pilot plant mission? In a pro/con format this paper will examine the key arguments for and against the AT, ST and CS magnetic configurations. Key topics addressed include: plasma parameters, device configurations, size and weight comparisons, diagnostic issues, maintenance schemes, availability influences and possible test cell arrangement schemes.
C1 [Brown, T.; Goldston, R. J.; Kessel, C.; Neilson, G. H.; Menard, J. E.; Prager, S.; Titus, P.; Zarnstorff, M.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[El-Guebaly, L.] Univ Wisconsin, Madison, WI USA.
[Malang, S.] Fus Nucl Technol Consulting, Linkenheim, Germany.
[Waganer, L.] Boeing Co, St Louis, MO USA.
RP Brown, T (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM tbrown@pppl.gov
OI Menard, Jonathan/0000-0003-1292-3286
NR 26
TC 2
Z9 2
U1 1
U2 7
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP 662
EP 669
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800042
ER
PT J
AU Titus, PH
Zolfaghari, A
AF Titus, Peter H.
Zolfaghari, Ali
TI TF INNER LEG SPACE ALLOCATION FOR PILOT PLANT DESIGN STUDIES
SO FUSION SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 20th American-Nuclear-Society (ANS) Topical Meeting on the Technology of
Fusion Energy (TOFE)
CY AUG 27-31, 2012
CL Nashville, TN
SP Amer Nucl Soc (ANS), Oak Ridge Natl Lab, US ITER, Lawrence Livermore Natl Lab, Princeton Plasma Phys Lab, Naval Res Lab, Atom Energy Soc Japan, Canadian Nucl Soc, Inst Elect & Elect Engineers
AB A critical design feature of any tokamak is the space taken up by the inner leg of the toroidal field (TF) coil. The radial build needed for the TF inner leg, along with shield thickness, size of the central solenoid and plasma minor radius set the major radius of the machine. Small reductions in the TF build can have a large impact on the overall cost of the reactor.
The cross section of the TF inner leg support the centering force and that portion of the vertical separating force that is not supported by the outer structures. In this paper, the TF inner leg equatorial plane cross sections are considered. Out-of-Plane (OOP) forces are taken by structures that are not closely coupled with the radial build of the central column at the equatorial plane. The "Vertical Access AT Pilot Plant" currently under consideration at PPPL is used as a starting point for the structural, field and current requirements. Other TF structural concepts are considered. With the expectation that the pilot plant will be a steady state machine, a static stress criteria is used for all the concepts. The coils are assumed to be superconducting, with the superconductor not contributing to the structural strength. Limit analysis is employed to assess the degree of conservatism in the static criteria as it is applied to a linear elastic stress analysis. TF concepts, and in particular the PPPL AT PILOT plate concept are evaluated based on amount of space needed for structure and the amount of space left for superconductor.
C1 [Titus, Peter H.; Zolfaghari, Ali] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Titus, PH (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM ptitus@pppl.gov
NR 4
TC 0
Z9 0
U1 0
U2 1
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 1536-1055
J9 FUSION SCI TECHNOL
JI Fusion Sci. Technol.
PD SEP
PY 2013
VL 64
IS 3
BP 680
EP 686
PG 7
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NK
UT WOS:000323914800045
ER
PT J
AU Nilsen, J
Johnson, WR
Cheng, KT
AF Nilsen, Joseph
Johnson, Walter R.
Cheng, K. T.
TI The effect of bound states on X-ray Thomson scattering for partially
ionized plasmas
SO HIGH ENERGY DENSITY PHYSICS
LA English
DT Article
DE Average atom technique; Thomson scattering; X-FEL; Plasma diagnostic
techniques; Laser-plasma interactions; Strongly coupled plasmas;
Dielectric properties
AB X-ray Thomson scattering is being developed as a method to measure the temperature, electron density, and ionization state of high energy density plasmas such as those used in inertial confinement fusion. Xray laser sources have always been of interest because of the need to have a bright monochromatic X-ray source to overcome plasma emission and eliminate other lines in the background that complicate the analysis. With the advent of the X-ray free electron laser (X-FEL) at the SNAL Linac Coherent Light Source (LCLS) and other facilities coming online worldwide, we now have such a source available in the key regime. An important challenge with X-ray Thomson scattering experiments is understanding how to model the scattering for partially ionized plasmas. Most Thomson scattering codes used to model experimental data greatly simplify or neglect the contributions of the bound electrons to the scattered intensity. In this work we take the existing models of Thomson scattering that include elastic ion ion scattering and inelastic electron electron scattering and add the contribution of bound electrons in the partially ionized plasmas. Except for hydrogen plasmas, most plasmas studied today have bound electrons and it is important to understand their contribution to the Thomson scattering, especially as new X-ray sources such as an X-FEL will allow us to study much higher Z plasmas. To date, most experiments have studied hydrogen or beryllium plasmas. We first analyze existing experimental data for beryllium to validate the code. We then consider several higher Z materials such as Cr and predict the existence of additional peaks in the scattering spectrum that require new computational tools to understand. For a Sn plasma, we show that bound contributions change the shape of the scattered spectrum in a way that would change the plasma temperature and density inferred from experiment. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Nilsen, Joseph; Cheng, K. T.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Johnson, Walter R.] Univ Notre Dame, Notre Dame, IN 46556 USA.
RP Nilsen, J (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM jnilsen@llnl.gov
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX This work was performed under the auspices of the U.S. Department of
Energy by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344.
NR 9
TC 3
Z9 3
U1 0
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-1818
J9 HIGH ENERG DENS PHYS
JI High Energy Density Phys.
PD SEP
PY 2013
VL 9
IS 3
BP 388
EP 391
DI 10.1016/j.hedp.2013.04.010
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 210SP
UT WOS:000323855100002
ER
PT J
AU Johnson, WR
Nilsen, J
Cheng, KT
AF Johnson, W. R.
Nilsen, J.
Cheng, K. T.
TI Resonant bound-free contributions to Thomson scattering of X-rays by
warm dense matter
SO HIGH ENERGY DENSITY PHYSICS
LA English
DT Article
DE 52.25.Os: Emission; Absorption and scattering of radiation; 52.38.-r:
Laser-plasma interaction; 52.70.-m: Plasma diagnostic techniques;
56.65.Rr: Particle in cell method
AB Recent calculations [Nilsen et al. arXiv:1212.5972] predict that contributions to the scattered photon spectrum from 3s and 3p bound states in chromium (Z = 24) at metallic density and T = 12 eV resonate below the respective bound-state thresholds. These resonances are shown to be closely related to continuum lowering, where 3d bound states in the free atom dissolve into a resonant l = 2 partial wave in the continuum. The resulting d-state resonance dominates contributions to the bound-free dynamic structure function, leading to the predicted resonances in the scattered X-ray spectrum. Similar resonant features are shown to occur in all elements in the periodic table between Ca and Mn (20 <= Z <= 25). (C) 2013 Elsevier B.V. All rights reserved.
C1 [Johnson, W. R.] Univ Notre Dame, Notre Dame, IN 46556 USA.
[Nilsen, J.; Cheng, K. T.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Johnson, WR (reprint author), Univ Notre Dame, Notre Dame, IN 46556 USA.
EM johnson@nd.edu; nilsen1@llnl.gov; ktcheng@llnl.gov
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX The authors owe a debt of gratitude to T. Doppner for bringing up the
question of the origin of the resonances predicted in average-atom
calculations. The work of J.N. and K.T.C. was performed under the
auspices of the U.S. Department of Energy by Lawrence Livermore National
Laboratory under Contract DE-AC52-07NA27344.
NR 3
TC 3
Z9 3
U1 1
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-1818
J9 HIGH ENERG DENS PHYS
JI High Energy Density Phys.
PD SEP
PY 2013
VL 9
IS 3
BP 407
EP 409
DI 10.1016/j.hedp.2013.03.008
PG 3
WC Physics, Fluids & Plasmas
SC Physics
GA 210SP
UT WOS:000323855100005
ER
PT J
AU Zhang, Z
Nishimura, H
Namimoto, T
Fujioka, S
Arikawa, Y
Nagatomo, H
Nakai, M
Ozaki, T
Koga, M
Johzaki, T
Sunahara, A
Chen, H
Park, J
Williams, GJ
Shiraga, H
Kojima, S
Nishikino, M
Kawachi, T
Hosoda, H
Okano, Y
Miyanaga, N
Kawanaka, J
Nakata, Y
Jitsuno, T
Azechi, H
AF Zhang, Z.
Nishimura, H.
Namimoto, T.
Fujioka, S.
Arikawa, Y.
Nagatomo, H.
Nakai, M.
Ozaki, T.
Koga, M.
Johzaki, T.
Sunahara, A.
Chen, H.
Park, J.
Williams, G. J.
Shiraga, H.
Kojima, S.
Nishikino, M.
Kawachi, T.
Hosoda, H.
Okano, Y.
Miyanaga, N.
Kawanaka, J.
Nakata, Y.
Jitsuno, T.
Azechi, H.
TI Quantitative measurement of hard X-ray spectra from laser-driven fast
ignition plasma
SO HIGH ENERGY DENSITY PHYSICS
LA English
DT Article
DE X-ray spectroscopy; Laser-plasma interaction; Hard X-rays; Fast ignition
ID PULSE
AB Absolute K alpha line spectroscopy is proposed for studying laser plasma interactions taking place in the Au cone-guided fast ignition targets. X-ray spectra ranging from 20 to 100 key were quantitatively measured with a Laue spectrometer composed of a cylindrically curved crystal and a filter-absorption method for Bremsstrahlung continuum emission. The absolute sensitivities of the Laue spectrometer systems were calibrated using pre-characterized laser-produced X-ray sources and radioisotopes. The integrated reflectivity for the crystal is in good agreement with predictions by an X-ray diffraction code. The energy transfer efficiency from incident laser beams to hot electrons, as the energy transfer mechanism, is derived from this work. The absolute yield of Au and Ta K alpha lines were measured in the fast ignition experimental campaign performed at Institute of Laser Engineering, Osaka University. Applying the hot electron spectrum information from electron spectrometer and scaling laws, the energy transfer efficiency from the incident LFEX, a kJ-class PW laser, to hot electrons was derived for the first time. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Zhang, Z.; Nishimura, H.; Namimoto, T.; Fujioka, S.; Arikawa, Y.; Nagatomo, H.; Nakai, M.; Koga, M.; Shiraga, H.; Kojima, S.; Hosoda, H.; Miyanaga, N.; Kawanaka, J.; Nakata, Y.; Jitsuno, T.; Azechi, H.] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan.
[Ozaki, T.] LHD, Natl Inst Fus Sci, Gifu 5095292, Japan.
[Johzaki, T.] Hiroshima Univ, Grad Sch Engn, Higashihiroshima 7398527, Japan.
[Sunahara, A.] Inst Laser Technol, Suita, Osaka 5650871, Japan.
[Chen, H.; Park, J.; Williams, G. J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Nishikino, M.; Kawachi, T.] JAEA, Kansai Photon Sci Inst, Quantum Beam Sci Directorate, Kyoto 6190215, Japan.
[Okano, Y.] Natl Inst Nat Sci, Inst Mol Sci, Laser Res Ctr Mol Sci, Okazaki, Aichi 4448585, Japan.
RP Zhang, Z (reprint author), Osaka Univ, Inst Laser Engn, 2-2 Yamada Oka, Suita, Osaka 5650871, Japan.
EM zhang-z@ile.osaka-u.ac.jp
RI Johzaki, Tomoyuki/D-8678-2012; Okano, Yasuaki/A-3998-2015; Miyanaga,
Noriaki/F-1340-2015; Azechi, Hiroshi/H-5876-2015; Nakai,
Mitsuo/I-6758-2015; Nishimura, Hiroaki/I-4908-2015; Shiraga,
Hiroyuki/I-9565-2015; Fujioka, Shinsuke/J-5530-2015; Nakata,
Yoshiki/L-4957-2015; Arikawa, Yasunobu/L-8760-2015; Jitsuno,
Takahisa/M-6056-2015; Kawanaka, Junji/P-8065-2015; Zhang,
Zhe/J-2655-2014
OI SUNAHARA, ATSUSHI/0000-0001-7543-5226; Miyanaga,
Noriaki/0000-0002-9902-5392; Nakai, Mitsuo/0000-0001-6076-756X; Fujioka,
Shinsuke/0000-0001-8406-1772; Nakata, Yoshiki/0000-0002-0680-999X;
Arikawa, Yasunobu/0000-0002-3142-3060; Kawanaka,
Junji/0000-0001-5655-7981; Zhang, Zhe/0000-0001-8076-5094
FU U.S. DOE by LLNL [DE-AC52-07NA27344]
FX The authors would like to thank the Gekko-XII and LFEX laser operation
crew, the target fabrication group, the plasma diagnostics group, and
the computer operation staffs for their great contribution to this work.
The work by LLNL staffs was performed under the auspices of the U.S. DOE
by LLNL under Contract DE-AC52-07NA27344.
NR 20
TC 3
Z9 3
U1 0
U2 18
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-1818
J9 HIGH ENERG DENS PHYS
JI High Energy Density Phys.
PD SEP
PY 2013
VL 9
IS 3
BP 435
EP 438
DI 10.1016/j.hedp.2013.04.001
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 210SP
UT WOS:000323855100010
ER
PT J
AU Grosskopf, MJ
Drake, RP
Miles, AR
Plewa, T
Kuranz, CC
AF Grosskopf, M. J.
Drake, R. P.
Miles, A. R.
Plewa, T.
Kuranz, C. C.
TI Modeling of aspheric, diverging hydrodynamic instability experiments on
the National Ignition Facility
SO HIGH ENERGY DENSITY PHYSICS
LA English
DT Article
DE Computer simulation; Laboratory astrophysics
ID CORE-COLLAPSE SUPERNOVAE; RAYLEIGH-TAYLOR INSTABILITY; 2-DIMENSIONAL
SIMULATIONS; DECELERATING INTERFACE; EARLY EVOLUTION; NOVA LASER;
SN-1987A; EXPLOSIONS; RELEVANT; JETS
AB One branch of work in the laboratory astrophysics community has been focused on developing the understanding of hydrodynamic mixing in core-collapse supernovae (ccSNe) by the Rayleigh Taylor instability. Experiments studying these processes in the past have been limited to planar systems in large part due to limitations of drive energy. The National Ignition Facility (NIF) is now capable of providing experiments with far more energy than has been previously available on laser facilities, enabling supernova-relevant hydrodynamics in a diverging system. This paper focuses on a proposed design in which hydrodynamic instabilities develop from an aspheric blast-wave driven through multiple, coupled interfaces in a hemispheric target in which the relative masses of the layers are scaled to those within the ccSNe progenitor star. The simulations investigate the diagnosability and experimental value of different designs using a variety of drive conditions. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Grosskopf, M. J.; Drake, R. P.; Kuranz, C. C.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Miles, A. R.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Plewa, T.] Florida State Univ, Tallahassee, FL 32306 USA.
RP Grosskopf, MJ (reprint author), Univ Michigan, Ann Arbor, MI 48109 USA.
EM mikegros@umich.edu
RI Drake, R Paul/I-9218-2012
OI Drake, R Paul/0000-0002-5450-9844
FU NNSA-DS; SC-OFES Joint Program in High-Energy-Density Laboratory
Plasmas; National Laser User Facility Program in NNSA-DS; Predictive
Sciences Academic Alliances Program in NNSA-ASC; [DE-FG52-09NA29548];
[DE-FG52-09NA29034]; [DE-FC52-08NA28616]
FX This work is funded by the NNSA-DS and SC-OFES Joint Program in
High-Energy-Density Laboratory Plasmas, by the National Laser User
Facility Program in NNSA-DS and by the Predictive Sciences Academic
Alliances Program in NNSA-ASC. The corresponding grant numbers are
DE-FG52-09NA29548, DE-FG52-09NA29034, and DE-FC52-08NA28616.
NR 49
TC 1
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U1 0
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-1818
EI 1878-0563
J9 HIGH ENERG DENS PHYS
JI High Energy Density Phys.
PD SEP
PY 2013
VL 9
IS 3
BP 439
EP 447
DI 10.1016/j.hedp.2013.04.003
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 210SP
UT WOS:000323855100011
ER
PT J
AU Gaffney, JA
Clark, D
Sonnad, V
Libby, SB
AF Gaffney, J. A.
Clark, D.
Sonnad, V.
Libby, S. B.
TI Bayesian inference of inaccuracies in radiation transport physics from
inertial confinement fusion experiments
SO HIGH ENERGY DENSITY PHYSICS
LA English
DT Article
DE Inertial confinement fusion; Radiation hydrodynamic simulation; Bayesian
inference; Plasma opacity; Uncertainty quantification; National Ignition
Facility radiation transport
AB First principles microphysics models are essential to the design and analysis of high energy density physics experiments. Using experimental data to investigate the underlying physics is also essential, particularly when simulations and experiments are not consistent with each other. This is a difficult task, due to the large number of physical models that play a role, and due to the complex and noisy nature of the experiments. This results in a large number of parameters that make any inference a daunting task; it is also very important to consistently treat both experimental and prior understanding of the problem. In this paper we present a Bayesian method that includes both these effects, and allows the inference of a set of modifiers that have been constructed to give information about microphysics models from experimental data. We pay particular attention to radiation transport models. The inference takes into account a large set of experimental parameters and an estimate of the prior knowledge through a modified chi(2) function, which is minimised using an efficient genetic algorithm. Both factors play an essential role in our analysis. We find that although there is evidence of inaccuracies in off-line calculations of X-ray drive intensity and Ge L shell absorption, modifications to radiation transport are unable to reconcile differences between 1D HYDRA simulations and the experiment. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Gaffney, J. A.; Clark, D.; Sonnad, V.; Libby, S. B.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Gaffney, JA (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA.
EM gaffney3@llnl.gov
OI Gaffney, Jim/0000-0002-2408-0047
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]; [LLNL-JRNL-617033]
FX This work performed under the auspices of the U.S. Department of Energy
by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344. LLNL-JRNL-617033.
NR 18
TC 4
Z9 4
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-1818
J9 HIGH ENERG DENS PHYS
JI High Energy Density Phys.
PD SEP
PY 2013
VL 9
IS 3
BP 457
EP 461
DI 10.1016/j.hedp.2013.04.012
PG 5
WC Physics, Fluids & Plasmas
SC Physics
GA 210SP
UT WOS:000323855100013
ER
PT J
AU Turck-Chieze, S
Gilles, D
Le Pennec, M
Blenski, T
Thais, F
Bastiani-Ceccotti, S
Blancard, C
Busquet, M
Caillaud, T
Colgan, J
Cosse, P
Delahaye, F
Ducreta, JE
Faussurier, G
Fontes, CJ
Gilleron, F
Guzik, J
Harris, JW
Kilcrease, DP
Loisel, G
Magee, NH
Pain, JC
Reverdin, C
Silvert, V
Villette, B
Zeippen, CJ
AF Turck-Chieze, S.
Gilles, D.
Le Pennec, M.
Blenski, T.
Thais, F.
Bastiani-Ceccotti, S.
Blancard, C.
Busquet, M.
Caillaud, T.
Colgan, J.
Cosse, P.
Delahaye, F.
Ducreta, J. E.
Faussurier, G.
Fontes, C. J.
Gilleron, F.
Guzik, J.
Harris, J. W.
Kilcrease, D. P.
Loisel, G.
Magee, N. H.
Pain, J. C.
Reverdin, C.
Silvert, V.
Villette, B.
Zeippen, C. J.
TI Radiative properties of stellar envelopes: Comparison of asteroseismic
results to opacity calculations and measurements for iron and nickel
SO HIGH ENERGY DENSITY PHYSICS
LA English
DT Review
DE Stellar plasma; Stellar opacity calculations; Opacity measurements
ID TRANSITION-ARRAYS; ABSORPTION-MEASUREMENTS; ELEMENT OPACITIES; PLASMAS;
STARS; PULSATIONS; SPECTRA; PROJECT; MODEL; CODE
AB The international OPAC consortium consists of astrophysicists, plasma physicists and experimentalists who examine opacity calculations used in stellar physics that appear questionable and perform new calculations and laser experiments to understand the differences and improve the calculations. We report on iron and nickel opacities for envelopes of stars from 2 to 14 M and deliver our first conclusions concerning the reliability of the used calculations by illustrating the importance of the configuration interaction and of the completeness of the calculations for temperatures around 15-27 eV. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Turck-Chieze, S.; Gilles, D.; Le Pennec, M.; Ducreta, J. E.] CE Saclay, CEA DSM IRFU SAp, UMR 7158, F-91190 Gif Sur Yvette, France.
[Blenski, T.; Thais, F.; Loisel, G.] CE Saclay, CEA DSM IRAMIS SPAM, F-91190 Gif Sur Yvette, France.
[Bastiani-Ceccotti, S.] UPMC, CEA, CNRS, LULI,Ecole Polytech, F-91128 Palaiseau, France.
[Blancard, C.; Caillaud, T.; Cosse, P.; Faussurier, G.; Gilleron, F.; Pain, J. C.; Reverdin, C.; Silvert, V.; Villette, B.] CEA DAM DIF, F-91297 Arpajon, France.
[Busquet, M.] ARTEP, Ellicott City, MD 21042 USA.
[Colgan, J.; Guzik, J.; Kilcrease, D. P.; Magee, N. H.] LANL, Div Theoret, Los Alamos, NM 87545 USA.
[Fontes, C. J.] LANL, Computat Phys Div, Los Alamos, NM 87545 USA.
[Delahaye, F.; Zeippen, C. J.] LERMA Observ Paris, F-92195 Meudon, France.
[Harris, J. W.] AWE, Reading RG7 4PR, Berks, England.
RP Turck-Chieze, S (reprint author), CE Saclay, CEA DSM IRFU SAp, UMR 7158, F-91190 Gif Sur Yvette, France.
EM Sylvaine.Turck-Chieze@cea.fr
OI Colgan, James/0000-0003-1045-3858; Pain,
Jean-Christophe/0000-0002-7825-1315; Kilcrease,
David/0000-0002-2319-5934
NR 43
TC 11
Z9 11
U1 2
U2 14
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-1818
EI 1878-0563
J9 HIGH ENERG DENS PHYS
JI High Energy Density Phys.
PD SEP
PY 2013
VL 9
IS 3
BP 473
EP 479
DI 10.1016/j.hedp.2013.04.004
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 210SP
UT WOS:000323855100015
ER
PT J
AU Welser-Sherrill, L
Fincke, J
Doss, F
Loomis, E
Flippo, K
Offermann, D
Keiter, P
Haines, B
Grinstein, F
AF Welser-Sherrill, L.
Fincke, J.
Doss, F.
Loomis, E.
Flippo, K.
Offermann, D.
Keiter, P.
Haines, B.
Grinstein, F.
TI Two laser-driven mix experiments to study reshock and shear
SO HIGH ENERGY DENSITY PHYSICS
LA English
DT Article
DE Turbulence; Mix; High energy density experiments; Inertial Confinement
Fusion
AB In an effort to better understand mix in Inertial Confinement Fusion (ICF) implosion cores, a series of laser-driven mix experiments has been designed for the University of Rochester's OMEGA laser. Our objective is to perform experiments to investigate the turbulent mixing at material interfaces when subject to multiple shocks and reshocks or high-speed shear. Ultimately, these experiments are providing detailed quantitative measurements to assist in validation efforts for the BHR-2 mix model, which is implemented in the RAGE hydrodynamics code. The Reshock experiment studies the physical process of shocking and reshocking mix layers. Radiographs are recorded to compile a temporal evolution of the mixing layer and its subsequent reshock, compression, and re-growth phases. The Shear experiment investigates shear-driven growth of a mix layer, and radiography captures the time evolution of the development of turbulent mixing due to shear. Simulations of both the Reshock and Shear experiments using RAGE and the BHR-2 mix model demonstrate good agreement with the mix evolution seen in the experimental data, giving confidence that BHR-2 is capable of simulating the behavior of both compressive and shear-driven turbulent flows. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Welser-Sherrill, L.; Fincke, J.; Doss, F.; Loomis, E.; Flippo, K.; Offermann, D.; Keiter, P.; Haines, B.; Grinstein, F.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Welser-Sherrill, L (reprint author), MS T086,POB 1663, Los Alamos, NM 87545 USA.
EM lwelser@lanl.gov
RI Flippo, Kirk/C-6872-2009;
OI Flippo, Kirk/0000-0002-4752-5141; Offermann, Dustin/0000-0002-6033-4905;
Haines, Brian/0000-0002-3889-7074
FU U.S. Department of Energy [DE-AC52-06NA25396]
FX The authors would like to gratefully acknowledge the contributions of
Los Alamos target fabrication and the OMEGA operations crew, who were
invaluable to the success of these experiments. Los Alamos National
Laboratory is operated by Los Alamos National Security, LLC, under
contract DE-AC52-06NA25396 for the U.S. Department of Energy.
NR 9
TC 18
Z9 18
U1 3
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-1818
J9 HIGH ENERG DENS PHYS
JI High Energy Density Phys.
PD SEP
PY 2013
VL 9
IS 3
BP 496
EP 499
DI 10.1016/j.hedp.2013.04.015
PG 4
WC Physics, Fluids & Plasmas
SC Physics
GA 210SP
UT WOS:000323855100019
ER
PT J
AU Golovkin, I
MacFarlane, JJ
Woodruff, P
Hall, I
Gregori, G
Bailey, J
Harding, E
Ao, T
Glenzer, S
AF Golovkin, Igor
MacFarlane, Joseph J.
Woodruff, Pamela
Hall, Iain
Gregori, Gianluca
Bailey, James
Harding, Eric
Ao, Tom
Glenzer, Siegfried
TI Simulation of X-ray scattering diagnostics in multi-dimensional plasma
SO HIGH ENERGY DENSITY PHYSICS
LA English
DT Article
DE X-ray scattering; Dense plasma diagnostics; Spectroscopy
ID INERTIAL CONFINEMENT FUSION; NATIONAL IGNITION FACILITY; SOLID DENSITY
PLASMAS; THOMSON SCATTERING; PHYSICS BASIS
AB X-ray scattering is a powerful diagnostic technique that has been used in a variety of experimental settings to determine the temperature, density, and ionization state of warm dense matter. In order to maximize the intensity of the scattered signal, the x-ray source is often placed in close proximity to the target plasma. Therefore, the interpretation of the experimental data can become complicated by the fact that the detector records photons scattered at different angles from points within the plasma volume. In addition, the target plasma that is scattering the x-rays can have significant temperature and density gradients. To address these issues, we have developed the capability to simulate x-ray scattering for realistic experimental configurations where the effects of plasma non-uniformities and a range of x-ray scattering angles are included. We will discuss the implementation details and show results relevant to previous and ongoing experimental investigations. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Golovkin, Igor; MacFarlane, Joseph J.; Woodruff, Pamela; Hall, Iain] Prism Computat Sci Inc, Madison, WI 53711 USA.
[Gregori, Gianluca] Univ Oxford, Dept Phys, Oxford OX1 3PU, England.
[Bailey, James; Harding, Eric; Ao, Tom] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Glenzer, Siegfried] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA.
RP Golovkin, I (reprint author), Prism Computat Sci Inc, 455 Sci Dr,Suite 140, Madison, WI 53711 USA.
EM golovkin@prism-cs.com
NR 20
TC 5
Z9 5
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-1818
J9 HIGH ENERG DENS PHYS
JI High Energy Density Phys.
PD SEP
PY 2013
VL 9
IS 3
BP 510
EP 515
DI 10.1016/j.hedp.2013.05.001
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 210SP
UT WOS:000323855100022
ER
PT J
AU Hansen, S
Armstrong, GSJ
Bastiani-Ceccotti, S
Bowen, C
Chung, HK
Colgan, JP
de Dortan, F
Fontes, CJ
Gilleron, F
Marques, JR
Piron, R
Peyrusse, O
Poirier, M
Ralchenko, Y
Sasaki, A
Stambulchik, E
Thais, F
AF Hansen, Stephanie
Armstrong, G. S. J.
Bastiani-Ceccotti, S.
Bowen, C.
Chung, H. -K.
Colgan, J. P.
de Dortan, F.
Fontes, C. J.
Gilleron, F.
Marques, J. -R.
Piron, R.
Peyrusse, O.
Poirier, M.
Ralchenko, Yu.
Sasaki, A.
Stambulchik, E.
Thais, F.
TI Testing the reliability of non-LTE spectroscopic models for complex ions
SO HIGH ENERGY DENSITY PHYSICS
LA English
DT Article
DE X-ray spectroscopy; Atomic kinetics; Plasma diagnostics; L-shell
ID X-RAY; PLASMAS; WORKSHOP; RECOMBINATION
AB Collisional-radiative atomic models are widely used to help diagnose experimental plasma conditions through fitting and interpreting measured spectra. Here we present the results of a code comparison in which a variety of models determined plasma temperatures and densities by finding the best fit to an experimental L-shell Kr spectrum from a well characterized, but not benchmarked, laser plasma. While variations in diagnostic strategies and qualities of fit were significant, the results generally confirmed the typically quoted uncertainties for such diagnostics of 20% in electron temperature and factors of about two in density. The comparison also highlighted some model features important for spectroscopic diagnostics: fine structure was required to match line positions and relative intensities within each charge state and for density diagnostics based on emission from metastable states; an extensive configuration set was required to fit the wings of satellite features and to reliably diagnose the temperature through the inferred charge state distribution; and the inclusion of self-consistent opacity effects was an important factor in the quality of the fit. Published by Elsevier B.V.
C1 [Hansen, Stephanie] Sandia Natl Labs, Albuquerque, NM 87123 USA.
[Armstrong, G. S. J.; Colgan, J. P.; Fontes, C. J.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Bastiani-Ceccotti, S.; Marques, J. -R.] UPMC, LULI, Ecole Polytech, CNRS,CEA, F-91128 Palaiseau, France.
[Bowen, C.; Gilleron, F.; Piron, R.] CEA, DAM, DIF, F-91297 Arpajon, France.
[Chung, H. -K.] IAEA, Nucl Data Sect, A-1400 Vienna, Austria.
[de Dortan, F.] Acad Sci Czech Republic, Inst Phys, Prague 8, Czech Republic.
[de Dortan, F.] UPM, DENIM, Madrid, Spain.
[Peyrusse, O.] Univ Bordeaux, CEA, CNRS, CELIA,UMR 5107, F-33400 Talence, France.
[Poirier, M.; Thais, F.] CEA, IRAMIS, Serv Photons Atomes & Mol, Ctr Etud Saclay, F-91191 Gif Sur Yvette, France.
[Ralchenko, Yu.] NIST, Gaithersburg, MD 20899 USA.
[Sasaki, A.] Japan Atom Energy Agcy, Kizugawa, Kyoto 6190215, Japan.
[Stambulchik, E.] Weizmann Inst Sci, Fac Phys, IL-76100 Rehovot, Israel.
RP Hansen, S (reprint author), Sandia Natl Labs, Albuquerque, NM 87123 USA.
EM sbhanse@sandia.gov
RI Ralchenko, Yuri/E-9297-2016; Sasaki, Akira/J-8158-2016;
OI Ralchenko, Yuri/0000-0003-0083-9554; Colgan, James/0000-0003-1045-3858
FU Sandia, a multiprogram laboratory; United States Department of Energy's
National Nuclear Security Administration [DE-AC04-94AL85000]; United
States Department of Energy [DE-AC52-06NA25396]; Office of Fusion Energy
Sciences of the U.S. Department of Energy; JSPS (Japan Society for the
Promotion of Science) [23340185, 23246165]; Czech Republic's Ministry of
Education, Youth and Sports [CZ,1.05/1.1.00/02.0061]; EC OP
[CZ.1.07/2.3.00/20.0087]
FX S.H. was supported by Sandia, a multiprogram laboratory operated by
Sandia Corporation, a Lockheed Martin Company, for the United States
Department of Energy's National Nuclear Security Administration under
contract DE-AC04-94AL85000. The work of G.A., J.C., and C.F. was
performed under the auspices of the United States Department of Energy
under contract DE-AC52-06NA25396. Yu.R. was supported in part by the
Office of Fusion Energy Sciences of the U.S. Department of Energy. A.S.
was supported in part by JSPS (Japan Society for the Promotion of
Science) grants No. 23340185 and 23246165. F.dD. was funded by Czech
Republic's Ministry of Education, Youth and Sports to the ELI-Beamlines
(ELI, CZ,1.05/1.1.00/02.0061) and EC OP CZ.1.07/2.3.00/20.0087.
NR 31
TC 12
Z9 12
U1 2
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-1818
J9 HIGH ENERG DENS PHYS
JI High Energy Density Phys.
PD SEP
PY 2013
VL 9
IS 3
BP 523
EP 527
DI 10.1016/j.hedp.2013.05.002
PG 5
WC Physics, Fluids & Plasmas
SC Physics
GA 210SP
UT WOS:000323855100024
ER
PT J
AU Pikuz, SA
Faenov, AY
Colgan, J
Dance, RJ
Abdallah, J
Wagenaars, E
Booth, N
Culfa, O
Evans, RG
Gray, RJ
Kaempfer, T
Lancaster, KL
McKenna, P
Rossall, AL
Skobelev, IY
Schulze, KS
Uschmann, I
Zhidkov, AG
Woolsey, NC
AF Pikuz, S. A.
Faenov, A. Ya.
Colgan, J.
Dance, R. J.
Abdallah, J.
Wagenaars, E.
Booth, N.
Culfa, O.
Evans, R. G.
Gray, R. J.
Kaempfer, T.
Lancaster, K. L.
McKenna, P.
Rossall, A. L.
Skobelev, I. Yu.
Schulze, K. S.
Uschmann, I.
Zhidkov, A. G.
Woolsey, N. C.
TI Measurement and simulations of hollow atom X-ray spectra of
solid-density relativistic plasma created by high-contrast PW optical
laser pulses
SO HIGH ENERGY DENSITY PHYSICS
LA English
DT Article
DE Relativistic laser plasma; Hollow atoms; X-ray spectroscopy; X-ray
sources; Radiation-dominated kinetics
ID EMISSION; ALUMINUM; RADIATION; IONS; IONIZATION; SCATTERING; SURFACE
AB K-shell spectra of solid Al excited by petawatt picosecond laser pulses have been investigated at the Vulcan PW facility. Laser pulses of ultrahigh contrast with an energy of 160 J on the target allow studies of interactions between the laser field and solid state matter at 10(20) W/cm(2). Intense X-ray emission of KK hollow atoms (atoms without n = 1 electrons) from thin aluminum foils is observed from optical laser plasma for the first time. Specifically for 1.5 mu m thin foil targets the hollow atom yield dominates the resonance line emission. It is suggested that the hollow atoms are predominantly excited by the impact of X-ray photons generated by radiation friction to fast electron currents in solid-density plasma due to Thomson scattering and bremsstrahlung in the transverse plasma fields. Numerical simulations of Al hollow atom spectra using the ATOMIC code confirm that the impact of keV photons dominates the atom ionization. Our estimates demonstrate that solid-density plasma generated by relativistic optical laser pulses provide the source of a polychromatic key range X-ray field of 10(18) W/cm(2) intensity, and allows the study of excited matter in the radiation-dominated regime. High-resolution X-ray spectroscopy of hollow atom radiation is found to be a powerful tool to study the properties of high-energy density plasma created by intense X-ray radiation. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Pikuz, S. A.; Faenov, A. Ya.; Skobelev, I. Yu.] Russian Acad Sci, Joint Inst High Temp, Moscow 125412, Russia.
[Colgan, J.; Abdallah, J.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Dance, R. J.; Wagenaars, E.; Culfa, O.; Rossall, A. L.; Woolsey, N. C.] Univ York, Dept Phys, York Plasma Inst, York YO10 5DD, N Yorkshire, England.
[Booth, N.; Lancaster, K. L.] STFC Rutherford Appleton Lab, Cent Laser Facil, Didcot OX11 0QX, Oxon, England.
[Evans, R. G.] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England.
[Gray, R. J.; McKenna, P.] Univ Strathclyde, SUPA, Dept Phys, Glasgow G4 ONG, Lanark, Scotland.
[Kaempfer, T.; Schulze, K. S.; Uschmann, I.] Helmholtzinst Jena, D-07743 Jena, Germany.
[Zhidkov, A. G.] Osaka Univ, Photon Pioneers Ctr, Suita, Osaka 5650871, Japan.
[Zhidkov, A. G.] JST CREST, Suita, Osaka 5650871, Japan.
[Faenov, A. Ya.] Japan Atom Energy Agcy, Quantum Beam Sci Directorate, Kizu, Kyoto 6190215, Japan.
[Uschmann, I.] Univ Jena, Inst Opt & Quantenelekt, D-07743 Jena, Germany.
RP Pikuz, SA (reprint author), Russian Acad Sci, Joint Inst High Temp, 13-2 Izhorskaya St, Moscow 125412, Russia.
EM spikuz@gmail.com
RI Pikuz, Sergey/F-7768-2014; McKenna, Paul/B-9764-2009; Wagenaars,
Erik/A-9248-2013; Rossall, Andrew/R-2312-2016;
OI Pikuz, Sergey/0000-0003-2529-1142; McKenna, Paul/0000-0001-8061-7091;
Wagenaars, Erik/0000-0002-5493-3434; Rossall,
Andrew/0000-0002-0123-8163; Colgan, James/0000-0003-1045-3858
FU U.S. Department of Energy [DE-AC52-06NA25396]; STFC; EPSRC of the United
Kingdom [EP/E048668/1]; RFBR; Royal Society [12-02-92617-KOa, E120059];
RF President Grant [MK-4725.2012.8]
FX The Los Alamos National Laboratory is operated by Los Alamos National
Security, LLC for the National Nuclear Security Administration of the
U.S. Department of Energy under Contract No. DE-AC52-06NA25396. The
research leading to these results has received funding from STFC and
EPSRC of the United Kingdom (Grant No. EP/E048668/1). The work is
supported by a mutual grant of the RFBR and Royal Society No.
12-02-92617-KOa / No. E120059, and RF President Grant No.
MK-4725.2012.8. We thank Vulcan technical and target preparation teams
at the Central Laser Facility for their support during the experiments.
NR 44
TC 11
Z9 11
U1 2
U2 22
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-1818
J9 HIGH ENERG DENS PHYS
JI High Energy Density Phys.
PD SEP
PY 2013
VL 9
IS 3
BP 560
EP 567
DI 10.1016/j.hedp.2013.05.008
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 210SP
UT WOS:000323855100030
ER
PT J
AU Barrios, MA
Fournier, KB
Regan, SP
Landen, O
May, M
Opachich, YP
Widmann, K
Bradley, DK
Collins, GW
AF Barrios, M. A.
Fournier, K. B.
Regan, S. P.
Landen, O.
May, M.
Opachich, Y. P.
Widmann, K.
Bradley, D. K.
Collins, G. W.
TI Backlighter development at the National Ignition Facility (NIF): Zinc to
zirconium
SO HIGH ENERGY DENSITY PHYSICS
LA English
DT Review
DE X-ray emission; Conversion efficiency; Backlighter foils
ID SECONDARY-ELECTRON EMISSION; LASER-PRODUCED PLASMAS; X-RAYS; CSI;
OPACITY; REGION
AB K-shell X-ray emission from laser-irradiated planar Zn, Ge, Br, and Zr foils was measured at the National Ignition Facility for laser irradiances in the range of 0.6-9.5 x 10(15) W/cm(2). The incident laser power had a pre-pulse to enhance the laser-to-X-ray conversion efficiency (CE) of a 2-5 ns constant-intensity pulse used as the main laser drive. The measured CE into the 8-16 key energy band ranged from 0.43% to 2%, while the measured CE into the He-like resonance 1s2-1s2p(1P) and intercombination 1s2-1s2p(3P) transitions, as well as from their 1s2(2s,2p)l-1s2p(2s,2p)l satellite transitions for l = 1, 2, 3, corresponding to the Li-, Be-, and B-like resonances, respectively, ranged from 0.3% to 1.5%. Absolute and relative CE measurements are consistent with X-ray energy scaling of (hv)(-3) to (he)(-5), where he is the X-ray energy. The temporal evolution of the broadband X-ray power was similar to the main laser drive for ablation plasmas having a critical density surface. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Barrios, M. A.; Fournier, K. B.; Landen, O.; May, M.; Opachich, Y. P.; Widmann, K.; Bradley, D. K.; Collins, G. W.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Regan, S. P.] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA.
RP Barrios, MA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM barriosgarci1@llnl.gov
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX The authors thank the operations crew at NIF for their effort and
support for these experiments. This work was done under the auspices of
the U.S. Department of Energy by Lawrence Livermore National Laboratory
under Contract DE-AC52-07NA27344.
NR 41
TC 17
Z9 17
U1 2
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-1818
EI 1878-0563
J9 HIGH ENERG DENS PHYS
JI High Energy Density Phys.
PD SEP
PY 2013
VL 9
IS 3
BP 626
EP 634
DI 10.1016/j.hedp.2013.05.018
PG 9
WC Physics, Fluids & Plasmas
SC Physics
GA 210SP
UT WOS:000323855100039
ER
PT J
AU Vaughan, K
Moore, AS
Smalyuk, V
Wallace, K
Gate, D
Glendinning, SG
McAlpin, S
Park, HS
Sorce, C
Stevenson, RM
AF Vaughan, K.
Moore, A. S.
Smalyuk, V.
Wallace, K.
Gate, D.
Glendinning, S. G.
McAlpin, S.
Park, H. S.
Sorce, C.
Stevenson, R. M.
TI High-resolution 22-52 keV backlighter sources and application to X-ray
radiography
SO HIGH ENERGY DENSITY PHYSICS
LA English
DT Article
DE Radiography; Backlighter; High-intensity; k-alpha
ID LASER-SOLID INTERACTIONS
AB The requirement for sources of hard X-rays suitable for high resolution radiography through large pR targets is prominent in many aspects of current laser-driven plasma physics research. In recent work using the OMEGA EP laser facility [L. J. Waxer, M. J. Guardalben, J. H. Kelly et al., CLEO/QELS, Optical Society of America, San Jose, CA, IEEE (2008)] at the Laboratory for Laser Energetics (LLE) in Rochester, NY, experiments have been performed to measure characteristics of 22-52 keV X-ray sources using high intensity short-pulse lasers. High quality point projection, two-dimensional radiography was demonstrated by irradiating microwire targets with laser intensities of 10(16)W cm(-2)-10(19) W cm(-2). Microwire targets were manufactured to dimensions of 10 mu m x 10 mu m x 300 mu m and were supported by a 100 mu m x 300 mu m x 6 mu m low-Z substrate. Measurements of the k-alpha conversion efficiency and X-ray source-size are discussed and, of particular importance for radiography, the spectral purity of the backlighter is characterized to assess the relative importance of the K alpha emission to bremsstrahlung background. (C) 2013 Published by Elsevier B.V.
C1 [Vaughan, K.; Moore, A. S.; Wallace, K.; Gate, D.; McAlpin, S.; Stevenson, R. M.] Atom Weap Estab, Aldermaston, England.
[Smalyuk, V.; Glendinning, S. G.; Park, H. S.; Sorce, C.] Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Moore, AS (reprint author), Atom Weap Estab, Aldermaston, England.
EM alastair.moore@physics.org
FU Ministry of Defence (MOD/UK)
FX These experiments were funded by the Ministry of Defence (MOD/UK).
NR 17
TC 3
Z9 3
U1 1
U2 10
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1574-1818
EI 1878-0563
J9 HIGH ENERG DENS PHYS
JI High Energy Density Phys.
PD SEP
PY 2013
VL 9
IS 3
BP 635
EP 641
DI 10.1016/j.hedp.2013.05.006
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 210SP
UT WOS:000323855100040
ER
PT J
AU Carpenter, J
Sandberg, R
AF Carpenter, John
Sandberg, Richard
TI Perspective on the Use of Coherent Diffraction Imaging as a Tool for
High Resolution Materials Characterization
SO JOM
LA English
DT Editorial Material
C1 [Carpenter, John] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
[Carpenter, John; Sandberg, Richard] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Carpenter, J (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
EM carpenter@lanl.gov
OI Sandberg, Richard/0000-0001-9719-8188; Carpenter,
John/0000-0001-8821-043X
NR 0
TC 0
Z9 0
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1047-4838
J9 JOM-US
JI JOM
PD SEP
PY 2013
VL 65
IS 9
BP 1181
EP 1182
DI 10.1007/s11837-013-0671-7
PG 2
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Mineralogy; Mining & Mineral Processing
SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy;
Mining & Mineral Processing
GA 207SF
UT WOS:000323623400017
ER
PT J
AU Harder, R
Robinson, IK
AF Harder, Ross
Robinson, Ian K.
TI Coherent X-Ray Diffraction Imaging of Morphology and Strain in
Nanomaterials
SO JOM
LA English
DT Article
ID BARIUM-TITANATE; NANOSCALE; PHASE; MICROCRYSTALS; MICROSCOPY; DYNAMICS;
FIELD
AB The last decade has seen a remarkable surge in x-ray characterization methods (Willmott, An Introduction to Synchrotron Radiation, John Wiley & Sons, Inc., New York, 2011). Imaging with x-rays has evolved from simple radiography, to image internal structure and diagnose injury, to a full-fledged tool for nanoscale characterization (Holt et al., Annu Rev Mater Res 43:1, 2013). Central to this development has been the advent of high-brilliance synchrotron and free electron laser sources of x-rays. The high degree of spacial coherence of the resulting beams has enabled novel imaging methods. Of these, coherent diffraction imaging has proven highly successful at imaging the structure in nano materials (Miao et al., Nature 400:342, 1999). In addition, this imaging method can be combined with Bragg diffraction to image strain with high sensitivity (Pfeifer et al., Nature 442:63, 2006; Robinson and Harder, Nat Mater 8:291, 2009).
C1 [Harder, Ross] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Robinson, Ian K.] UCL, London Ctr Nanotechnol, London WC1E 6BT, England.
[Robinson, Ian K.] Harwell, Didcot OX11 0DE, Oxon, England.
RP Harder, R (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
EM rharder@aps.anl.gov
FU U.S. Department of Energy, Basic Energy Sciences, Office of Science
[DE-AC02-06CH11357]
FX This work is supported by the U.S. Department of Energy, Basic Energy
Sciences, Office of Science, under Contract DE-AC02-06CH11357.
NR 42
TC 7
Z9 7
U1 5
U2 43
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1047-4838
J9 JOM-US
JI JOM
PD SEP
PY 2013
VL 65
IS 9
BP 1202
EP 1207
DI 10.1007/s11837-013-0682-4
PG 6
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Mineralogy; Mining & Mineral Processing
SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy;
Mining & Mineral Processing
GA 207SF
UT WOS:000323623400019
ER
PT J
AU Sandberg, RL
Huang, ZF
Xu, R
Rodriguez, JA
Miao, JW
AF Sandberg, Richard L.
Huang, Zhifeng
Xu, Rui
Rodriguez, Jose A.
Miao, Jianwei
TI Studies of Materials at the Nanometer Scale Using Coherent X-Ray
Diffraction Imaging
SO JOM
LA English
DT Article
ID ORDER HARMONIC-GENERATION; FOURIER-TRANSFORM HOLOGRAPHY;
EXTREME-ULTRAVIOLET LASER; PHASE-MATCHED GENERATION; FREE-ELECTRON
LASERS; ATOMIC-RESOLUTION; 3-DIMENSIONAL STRUCTURE; WAVELENGTH
RESOLUTION; ULTRAFAST LASERS; NONLINEAR OPTICS
AB For many years, x-ray microscopy has been attractive for materials studies with its ability to image thick samples and provide nanometer-scale resolution. However, the ability to manufacture high-resolution x-ray optics has been a hurdle to achieving the full potential of diffraction limited x-ray imaging. Recently, the advent of bright and coherent x-ray sources at synchrotrons and x-ray free electron lasers has enabled a lensless imaging technique called coherent diffractive imaging (CDI). Since it was first demonstrated in 1999, CDI has been rapidly developing into a materials imaging technique with resolutions approaching a few nanometers. This review provides an overview of the development of CDI and several applications to nanometer-scale imaging in two and three dimensions of biological and condensed mater materials. Also, we review the development of tabletop, coherent, soft x-ray sources that provide a complimentary and potentially more accessible source for nanometer-scale coherent imaging of materials.
C1 [Sandberg, Richard L.] Los Alamos Natl Lab, Lab Ultrafast Mat & Opt Sci, Ctr Integrated Nanotechnol, Los Alamos, NM 87544 USA.
[Huang, Zhifeng; Xu, Rui; Miao, Jianwei] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
[Huang, Zhifeng; Xu, Rui; Miao, Jianwei] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA.
[Rodriguez, Jose A.] Univ Calif Los Angeles, UCLA DOE Inst Genom & Prote, Dept Biol Chem, Los Angeles, CA 90095 USA.
[Rodriguez, Jose A.] Howard Hughes Med Inst, Chevy Chase, MD 20815 USA.
RP Sandberg, RL (reprint author), Los Alamos Natl Lab, Lab Ultrafast Mat & Opt Sci, Ctr Integrated Nanotechnol, POB 1663, Los Alamos, NM 87544 USA.
EM sandberg@lanl.gov
OI Sandberg, Richard/0000-0001-9719-8188
NR 167
TC 4
Z9 4
U1 3
U2 60
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1047-4838
EI 1543-1851
J9 JOM-US
JI JOM
PD SEP
PY 2013
VL 65
IS 9
BP 1208
EP 1220
DI 10.1007/s11837-013-0699-8
PG 13
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Mineralogy; Mining & Mineral Processing
SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy;
Mining & Mineral Processing
GA 207SF
UT WOS:000323623400020
ER
PT J
AU Carlsson, P
Lycksam, H
Gren, P
Gebart, R
Wiinikka, H
Iisa, K
AF Carlsson, Per
Lycksam, Henrik
Gren, Per
Gebart, Rikard
Wiinikka, Henrik
Iisa, Kristiina
TI High-speed imaging of biomass particles heated with a laser
SO JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
LA English
DT Article; Proceedings Paper
CT 19th International Symposium on Analytical and Applied Pyrolysis
(PYROLYSIS)
CY MAY 21-25, 2012
CL Johannes Kepler Univ, Linz, AUSTRIA
SP Bruker, CDS Analyt, Frontier Lab, Gerstel, JKU Chem Serv, Linz Tourism, Syreta, Shimadzu, Thermo Sci
HO Johannes Kepler Univ
DE Biomass; Pyrolysis; Laser; High-speed photography; Melting
ID PYROLYSIS; TEMPERATURE; CELLULOSE
AB In this work two types of lignocellulosic biomass particles, European spruce and American hardwood (particle sizes from 100 pm to 500 mu m) were pyrolyzed with a continuous wave 2W Nd:YAG laser. Simultaneously a high-speed camera was used to capture the behavior of the biomass particle as it was heated for about 0.1 s. Cover glasses were used as a sample holder which allowed for light microscope studies after the heating. Since the cover glasses are not initially heated by the laser, vapors from the biomass particle are quenched on the glass within about 1 particle diameter from the initial particle. Image processing was used to track the contour of the biomass particle and the enclosed area of the contour was calculated for each frame.
The main observations are: there is a significant difference between how much surface energy is needed to pyrolyze the spruce (about 75% more) compared to the hardwood. The oil-like substance which appeared on the glass during the experiment is solid at room temperature and shows different levels of transparency. A fraction of this substance is water soluble. A brownish coat is seen on the unreacted biomass. The biomass showed insignificant swelling as it was heated. The biomass particle appears to melt and boil at the front that is formed between the laser beam and the biomass particle. The part of the particle that is not subjected to the laser beam seems to be unaffected. (c) 2012 Elsevier B.V. All rights reserved.
C1 [Carlsson, Per; Wiinikka, Henrik] ETC, S-94128 Pitea, Sweden.
[Lycksam, Henrik; Gren, Per; Gebart, Rikard] Lulea Univ Technol, S-95187 Lulea, Sweden.
[Iisa, Kristiina] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Carlsson, P (reprint author), ETC, Box 726, S-94128 Pitea, Sweden.
EM per.carlsson@etcpitea.se
OI Gebart, Rikard/0000-0002-6958-5508
NR 17
TC 1
Z9 2
U1 0
U2 14
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0165-2370
J9 J ANAL APPL PYROL
JI J. Anal. Appl. Pyrolysis
PD SEP
PY 2013
VL 103
SI SI
BP 278
EP 286
DI 10.1016/j.jaap.2012.11.020
PG 9
WC Chemistry, Analytical; Spectroscopy
SC Chemistry; Spectroscopy
GA 210RO
UT WOS:000323852400038
ER
PT J
AU Akhavan, M
Imhoff, PT
Andres, AS
Finsterle, S
AF Akhavan, Maryam
Imhoff, Paul T.
Andres, A. Scott
Finsterle, Stefan
TI Model evaluation of denitrification under rapid infiltration basin
systems
SO JOURNAL OF CONTAMINANT HYDROLOGY
LA English
DT Article
DE Land based wastewater treatment; Denitrification; Biodegradation;
Modeling; Unsaturated zone; Overland flow
ID DISSOLVED ORGANIC-CARBON; SOIL-AQUIFER TREATMENT; MULTICOMPONENT
REACTIVE TRANSPORT; IN-SITU DENITRIFICATION; WASTE-WATER SYSTEMS;
MICROBIAL-GROWTH; NITROGEN TRANSFORMATION; GROUNDWATER RECHARGE; MEDIA;
SIMULATION
AB Rapid Infiltration Basin Systems (RIBS) are used for disposing reclaimed wastewater into soil to achieve additional treatment before it recharges groundwater. Effluent from most new sequenced batch reactor wastewater treatment plants is completely nitrified, and denitrification (DNF) is the main reaction for N removal. To characterize effects of complex surface and subsurface flow patterns caused by non-uniform flooding on DNF, a coupled overland flow-vadose zone model is implemented in the multiphase flow and reactive transport simulator TOUGHREACT. DNF is simulated in two representative soils varying the application cycle, hydraulic loading rate, wastewater quality, water table depth, and subsurface heterogeneity. Simulations using the conventional specified flux boundary condition under-predict DNF by as much as 450% in sand and 230% in loamy sand compared to predictions from the coupled overland flow-vadose zone model, indicating that simulating coupled flow is critical for predicting DNF in cases where hydraulic loading rates are not sufficient to spread the wastewater over the whole basin. Smaller ratios of wetting to drying time and larger hydraulic loading rates result in greater water saturations, more anoxic conditions, and faster water transport in the vadose zone, leading to greater DNF. These results in combination with those from different water table depths explain why reported DNF varied with soil type and water table depth in previous field investigations. Across all simulations, cumulative percent DNF varies between 2 and 49%, indicating that NO3 removal in RIBS may vary widely depending on operational procedures and subsurface conditions. These modeling results improve understanding of DNF in RIBS and suggest operational procedures that may improve NO3 removal. (c) 2013 Elsevier B.V. All rights reserved.
C1 [Akhavan, Maryam; Imhoff, Paul T.] Univ Delaware, Dept Civil & Environm Engn, Newark, DE 19716 USA.
[Andres, A. Scott] Delaware Geol Survey, Newark, DE 19716 USA.
[Finsterle, Stefan] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Imhoff, PT (reprint author), Univ Delaware, Dept Civil & Environm Engn, Newark, DE 19716 USA.
EM makhavan@udel.edu; imhoff@udel.edu; asandres@udel.edu;
safinsterle@lbl.gov
RI Finsterle, Stefan/A-8360-2009
OI Finsterle, Stefan/0000-0002-4446-9906
FU Delaware Water Resources Center; U.S. Dept. of Energy
[DE-AC02-05CH11231]
FX The authors thank Dr. Chuanhui Gu and Dr. Federico Maggi for their help
with TOUGHREACT and Dr. Andrew Barry for the helpful comments on
bioclogging. Computational facilities at the University of Delaware
Center for Applied Coastal Research were used in this work. Financial
support for this study was provided by the Delaware Water Resources
Center. The last co-author was supported, in part, by the U.S. Dept. of
Energy under Contract No. DE-AC02-05CH11231.
NR 84
TC 4
Z9 4
U1 4
U2 59
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-7722
EI 1873-6009
J9 J CONTAM HYDROL
JI J. Contam. Hydrol.
PD SEP
PY 2013
VL 152
BP 18
EP 34
DI 10.1016/j.jconhyd.2013.05.007
PG 17
WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources
SC Environmental Sciences & Ecology; Geology; Water Resources
GA 212OE
UT WOS:000323991900003
PM 23835290
ER
PT J
AU Wozniak, JM
Wilde, M
Katz, DS
AF Wozniak, Justin M.
Wilde, Michael
Katz, Daniel S.
TI JETS: Language and System Support for Many-Parallel-Task Workflows
SO JOURNAL OF GRID COMPUTING
LA English
DT Article
DE MPI; MTC; MPTC; Swift; JETS; NAMD; Workflow
ID MOLECULAR-DYNAMICS; SWIFT
AB Many-task computing is a well-established paradigm for implementing loosely coupled applications (tasks) on large-scale computing systems. However, few of the model's existing implementations provide efficient, low-latency support for executing tasks that are tightly coupled multiprocessing applications. Thus, a vast array of parallel applications cannot readily be used effectively within many-task workloads. In this work, we present JETS, a middleware component that provides high performance support for many-parallel-task computing (MPTC). JETS is based on a highly concurrent approach to parallel task dispatch and on new capabilities now available in the MPICH2 MPI implementation and the ZeptoOS Linux operating system. JETS represents an advance over the few known examples of multilevel many-parallel-task scheduling systems: it more efficiently schedules and launches many short-duration parallel application invocations; it overcomes the challenges of coupling the user processes of each multiprocessing application invocation via the messaging fabric; and it concurrently manages many application executions in various stages. We report here on the JETS architecture and its performance on both synthetic benchmarks and an MPTC application in molecular dynamics.
C1 [Wozniak, Justin M.; Wilde, Michael; Katz, Daniel S.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Wozniak, JM (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM wozniak@mcs.anl.gov
OI Katz, Daniel S./0000-0001-5934-7525
FU Office of Advanced Scientific Computing Research, Office of Science,
U.S. Department of Energy [DE-AC02-06CH11357]
FX This research is supported by the Office of Advanced Scientific
Computing Research, Office of Science, U.S. Department of Energy under
Contract DE-AC02-06CH11357. Computing resources were provided by the
Argonne Leadership Computing Facility.
NR 46
TC 0
Z9 0
U1 0
U2 5
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1570-7873
EI 1572-9184
J9 J GRID COMPUT
JI J. Comput.
PD SEP
PY 2013
VL 11
IS 3
BP 341
EP 360
DI 10.1007/s10723-013-9259-2
PG 20
WC Computer Science, Information Systems; Computer Science, Theory &
Methods
SC Computer Science
GA 208HX
UT WOS:000323669800002
ER
PT J
AU Gu, Y
Wu, CQ
Liu, X
Yu, DT
AF Gu, Yi
Wu, Chase Qishi
Liu, Xin
Yu, Dantong
TI Distributed Throughput Optimization for Large-Scale Scientific Workflows
Under Fault-Tolerance Constraint
SO JOURNAL OF GRID COMPUTING
LA English
DT Article
DE Fault tolerance; Throughput; Workflow mapping; Distributed algorithm
ID TASK-ALLOCATION ALGORITHMS; MAXIMIZING RELIABILITY; SCHEDULING
ALGORITHMS; COMPUTING SYSTEMS; MULTIPROCESSORS; GRAPHS; EXECUTION; TIME
AB With the advent of next-generation scientific applications, the workflow approach that integrates various computing and networking technologies has provided a viable solution to managing and optimizing large-scale distributed data transfer, processing, and analysis. This paper investigates a problem of mapping distributed scientific workflows for maximum throughput in faulty networks where nodes and links are subject to probabilistic failures. We formulate this problem as a bi-objective optimization problem to maximize both throughput and reliability. By adapting and modifying a centralized fault-free workflow mapping scheme, we propose a new mapping algorithm to achieve high throughput for smooth data flow in a distributed manner while satisfying a pre-specified bound of the overall failure rate for a guaranteed level of reliability. The performance superiority of the proposed solution is illustrated by both extensive simulation-based comparisons with existing algorithms and experimental results from a real-life scientific workflow deployed in wide-area networks.
C1 [Gu, Yi] Univ Tennessee, Dept Management Mkt Comp Sci & Info Syst, Martin, TN 38237 USA.
[Wu, Chase Qishi] Univ Memphis, Dept Comp Sci, Memphis, TN 38152 USA.
[Liu, Xin; Yu, Dantong] Brookhaven Natl Lab, Computat Sci Ctr, Upton, NY 11973 USA.
RP Gu, Y (reprint author), Univ Tennessee, Dept Management Mkt Comp Sci & Info Syst, 554 Univ St, Martin, TN 38237 USA.
EM ygu6@utm.edu; qishiwu@memphis.edu; xinliu@bnl.gov; dtyu@bnl.gov
FU U.S. Department of Energy's Office of Science [DE-SC0002400]; University
of Memphis
FX This research is sponsored by U.S. Department of Energy's Office of
Science under Grant No. DE-SC0002400 with University of Memphis.
NR 41
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U1 0
U2 6
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1570-7873
J9 J GRID COMPUT
JI J. Comput.
PD SEP
PY 2013
VL 11
IS 3
BP 361
EP 379
DI 10.1007/s10723-013-9266-3
PG 19
WC Computer Science, Information Systems; Computer Science, Theory &
Methods
SC Computer Science
GA 208HX
UT WOS:000323669800003
ER
PT J
AU Vahi, K
Harvey, I
Samak, T
Gunter, D
Evans, K
Rogers, D
Taylor, I
Goode, M
Silva, F
Al-Shakarchi, E
Mehta, G
Deelman, E
Jones, A
AF Vahi, Karan
Harvey, Ian
Samak, Taghrid
Gunter, Daniel
Evans, Kieran
Rogers, David
Taylor, Ian
Goode, Monte
Silva, Fabio
Al-Shakarchi, Eddie
Mehta, Gaurang
Deelman, Ewa
Jones, Andrew
TI A Case Study into Using Common Real-Time Workflow Monitoring
Infrastructure for Scientific Workflows
SO JOURNAL OF GRID COMPUTING
LA English
DT Article
DE Scientific workflows; Real time monitoring; Common monitoring
infrastructure; Log analysis; Troubleshooting; Workflow performance data
ID SCIENCE; TOOLKIT
AB Scientific workflow systems support various workflow representations, operational modes, and configurations. Regardless of the system used, end users have common needs: to track the status of their workflows in real time, be notified of execution anomalies and failures automatically, perform troubleshooting, and automate the analysis of the workflow results. In this paper, we describe how the Stampede monitoring infrastructure was integrated with the Pegasus Workflow Management System and the Triana Workflow Systems, in order to add generic real time monitoring and troubleshooting capabilities across both systems. Stampede is an infrastructure that provides interoperable monitoring using a three-layer model: (1) a common data model to describe workflow and job executions; (2) high-performance tools to load workflow logs conforming to the data model into a data store; and (3) a common query interface. This paper describes the integration of Stampede monitoring architecture with Pegasus and Triana and shows the new analysis capabilities that Stampede provides to these workflow systems. The successful integration of Stampede with these workflow engines demonstrates the generic nature of the Stampede monitoring infrastructure and its potential to provide a common platform for monitoring across scientific workflow engines.
C1 [Vahi, Karan; Mehta, Gaurang; Deelman, Ewa] USC Informat Sci Inst, Marina Del Rey, CA USA.
[Harvey, Ian; Evans, Kieran; Rogers, David; Taylor, Ian; Al-Shakarchi, Eddie; Jones, Andrew] Sch Comp Sci, Cardiff, S Glam, Wales.
[Samak, Taghrid; Gunter, Daniel; Goode, Monte] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Silva, Fabio] Univ So Calif, Los Angeles, CA USA.
RP Vahi, K (reprint author), USC Informat Sci Inst, Marina Del Rey, CA USA.
EM vahi@isi.edu; i.c.harvey@cs.cardiff.ac.uk; tsamak@lbl.gov;
dkgunter@lbl.gov; k.evans@cs.cardiff.ac.uk; d.m.rogers@cs.cardiff.ac.uk;
Ian.J.Taylor@cs.cardiff.ac.uk; mmgoode@lbl.gov; fabio.silva@usc.edu;
gmehta@isi.edu; deelman@isi.edu; Andrew.C.Jones@cs.cardiff.ac.uk
OI Taylor, Ian/0000-0001-5040-0772
FU Mathematical, Information, and Computational Sciences Division
subprogram of the Office of Advanced Scientific Computing Research,
Office of Science, U.S. Department of Energy [DE-AC02-05CH11231]; NSF
[OCI-0943705]; PPARC (GridOneD); PPARC [Geo 600, ST/F002033/1]
FX The Stampede work was supported in part by the Mathematical,
Information, and Computational Sciences Division subprogram of the
Office of Advanced Scientific Computing Research, Office of Science,
U.S. Department of Energy, under contract DE-AC02-05CH11231. Additional
support was provided by NSF grant OCI-0943705.; For Triana, we would
like to thank our sponsors, PPARC (GridOneD and Geo 600) for the
development of Triana, UK STFC TRIACS project ST/F002033/1 for the
Triacs work, Wellcome Trust for the Sintero work and the EU for the
Gridlab project to help the development of the distributed computing
capabilities and SHIWA for the development of the SHIWA bundles that
provide the cloud-based distributed mechanisms, described in the Triana
sections of this paper. We would also like to thank Andrew Harrison for
his insight and for helping recreate Triana in its present form.
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PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1570-7873
J9 J GRID COMPUT
JI J. Comput.
PD SEP
PY 2013
VL 11
IS 3
BP 381
EP 406
DI 10.1007/s10723-013-9265-4
PG 26
WC Computer Science, Information Systems; Computer Science, Theory &
Methods
SC Computer Science
GA 208HX
UT WOS:000323669800004
ER
PT J
AU Evans, JD
Brown, SJ
Hackett, KJ
Robinson, G
Richards, S
Lawson, D
Elsik, C
Coddington, J
Edwards, O
Emrich, S
Gabaldon, T
Goldsmith, M
Hanes, G
Misof, B
Munoz-Torres, M
Niehuis, O
Papanicolaou, A
Pfrender, M
Poelchau, M
Purcell-Miramontes, M
Robertson, HM
Ryder, O
Tagu, D
Torres, T
Zdobnov, E
Zhang, GJ
Zhou, X
AF Evans, Jay D.
Brown, Susan J.
Hackett, Kevin J.
Robinson, Gene
Richards, Stephen
Lawson, Daniel
Elsik, Christine
Coddington, Jonathan
Edwards, Owain
Emrich, Scott
Gabaldon, Toni
Goldsmith, Marian
Hanes, Glenn
Misof, Bernard
Munoz-Torres, Monica
Niehuis, Oliver
Papanicolaou, Alexie
Pfrender, Michael
Poelchau, Monica
Purcell-Miramontes, Mary
Robertson, Hugh M.
Ryder, Oliver
Tagu, Denis
Torres, Tatiana
Zdobnov, Evgeny
Zhang, Guojie
Zhou, Xin
CA i5K Consortium
TI The i5K Initiative:Advancing Arthropod Genomics for Knowledge, Human
Health,Agriculture, and the Environment i5K CONSORTIUM
SO JOURNAL OF HEREDITY
LA English
DT Article
DE comparative genomics; disease vector; agriculture; insect evolution;
genome sequencing
ID SEQUENCE
AB Insects and their arthropod relatives including mites, spiders, and crustaceans play major roles in the world's terrestrial, aquatic, and marine ecosystems. Arthropods compete with humans for food and transmit devastating diseases. They also comprise the most diverse and successful branch of metazoan evolution, with millions of extant species. Here, we describe an international effort to guide arthropod genomic efforts, from species prioritization to methodology and informatics. The 5000 arthropod genomes initiative (i5K) community met formally in 2012 to discuss a roadmap for sequencing and analyzing 5000 high-priority arthropods and is continuing this effort via pilot projects, the development of standard operating procedures, and training of students and career scientists, With university, governmental, and industry support, the i5K Consortium aspires to deliver sequences and analytical tools for each of the arthropod branches and each of the species having beneficial and negative effects on humankind.
C1 [Evans, Jay D.; Hackett, Kevin J.; Hanes, Glenn] USDA ARS, Beltsville, MD USA.
[Brown, Susan J.] Kansas State Univ, Manhattan, KS 66506 USA.
[Robinson, Gene; Robertson, Hugh M.] Univ Illinois, Urbana, IL 61801 USA.
[Richards, Stephen] Baylor Coll Med, Human Genome Sequencing Ctr, Houston, TX 77030 USA.
[Lawson, Daniel] European Bioinformat Inst Hinxton, Hinxton, England.
[Elsik, Christine] Univ Missouri, Columbia, MO USA.
[Coddington, Jonathan] Smithsonian Inst NMNH, Washington, DC USA.
[Edwards, Owain] CSIRO, Ctr Environm & Life Sci, Floreat, Australia.
[Emrich, Scott; Pfrender, Michael] Univ Notre Dame, South Bend, IN USA.
[Gabaldon, Toni] Ctr Genom Regulat, Barcelona, Spain.
[Goldsmith, Marian] Univ Rhode Isl, Providence, RI 02908 USA.
[Misof, Bernard; Niehuis, Oliver] Ctr Mol Biodivers Res, ZFMK, Bonn, Germany.
[Munoz-Torres, Monica] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Genom Div, Berkeley, CA 94720 USA.
[Papanicolaou, Alexie] CSIRO Ecosyst Sci, Black Mt, Australia.
[Poelchau, Monica] Georgetown Univ, Dept Biol, Washington, DC 20057 USA.
[Purcell-Miramontes, Mary] Natl Inst Food & Agr, USDA, Washington, DC USA.
[Ryder, Oliver] San Diego Zoo, Inst Conservat Res, San Diego, CA USA.
[Tagu, Denis] INRA UMR 1349 IGEPP, Rennes, France.
[Torres, Tatiana] Univ Sao Paulo, Sao Paulo, Brazil.
[Zdobnov, Evgeny] Univ Geneva, Sch Med, CH-1211 Geneva, Switzerland.
[Zhang, Guojie; Zhou, Xin] BGI Shenzhen, Shenzhen, Peoples R China.
RP Evans, JD (reprint author), ARS, USDA, Bee Res Lab, Beltsville, MD 20705 USA.
EM jay.evans@ars.usda.gov; kevin.hackett@ars.usda.gov;
generobi@illinois.edu; stephenr@hgsc.bcm.edu; lawson@ebi.ac.uk;
elsikc@missouri.edu; coddington@si.edu; owain.edwards@csixo.au;
semrich@nd.edu; toni.gabaldon@crg.es; mki101@uri.edu;
Glenn.Hanes@ars.usda.gov; b.misof.zfmk@uni-bonn.de; mcmunozt@lbl.gov;
o.niehuis.zfmk@uni-bonn.de; alexie.papanicolaou@csito.au;
pfrender.1@nd.edu; mpoel-chau@gmail.com; mpurcell@nifa.usda.gov;
hughrobe@life.uiuc.edu; oryder@sandiegozoo.org;
denis.tagu@rennes.inra.fr; tttorres@ib.usp.br; evgeny.zdobnov@unige.ch;
zhanggj@genomics.org.cn; xinzhou@genomics.org.cn
RI Torres, Tatiana/B-6431-2012; UMR IGEPP, INRA/A-4054-2011; Evans,
Jay/C-8408-2012; Zhang, Guojie/B-6188-2014; Edwards, Owain/B-9707-2008;
Papanicolaou, Alexie/A-1618-2011; Gabaldon, Toni/A-7336-2008; Zhou,
Xin/D-4025-2009; Zdobnov, Evgeny/K-1133-2012; Elsik,
Christine/C-4120-2017
OI Torres, Tatiana/0000-0002-4286-3504; Evans, Jay/0000-0002-0036-4651;
Zhang, Guojie/0000-0001-6860-1521; Papanicolaou,
Alexie/0000-0002-3635-6848; Gabaldon, Toni/0000-0003-0019-1735; Zhou,
Xin/0000-0002-1407-7952; Elsik, Christine/0000-0002-4248-7713
FU American Genetic Association; Arthropod Genomics Center (Kansas State
University); US Department of Agriculture (National Institute for Food
and Agriculture and Agricultural Research Service)
FX American Genetic Association; the Arthropod Genomics Center (Kansas
State University); and the US Department of Agriculture (National
Institute for Food and Agriculture and Agricultural Research Service).
NR 4
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PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 0022-1503
EI 1465-7333
J9 J HERED
JI J. Hered.
PD SEP-OCT
PY 2013
VL 104
IS 5
BP 595
EP 600
DI 10.1093/jhered/est050
PG 6
WC Evolutionary Biology; Genetics & Heredity
SC Evolutionary Biology; Genetics & Heredity
GA 203LJ
UT WOS:000323294400001
ER
PT J
AU Janka, O
Baumbach, RE
Thompson, JD
Bauer, ED
Kauzlarich, SM
AF Janka, Oliver
Baumbach, Ryan E.
Thompson, Joe D.
Bauer, Eric D.
Kauzlarich, Susan M.
TI Crystal structure, magnetism and transport properties of
Ce3Ni25.75Ru3.16Al4.1B10
SO JOURNAL OF SOLID STATE CHEMISTRY
LA English
DT Article
DE Rare earths; Intermetallic; Magnetic properties; Electrical resistivity;
Single crystal; Crystal structure
ID INTERMETALLIC COMPOUNDS; FLUX; ND
AB Single crystals of Ce3Ni25.75Ru3.16Al4.1B10 were obtained from a process in which a polycrystalline sample of CeRu2Al2B was annealed in an excess of a Ni-In flux. The initial phase, CeRu2Al2B, does not recrystallize, instead, crystals of a new phase, Ce3Ni25.75Ru3.16Al4.1B10, could be isolated once the flux was removed. The title compound crystallizes in the tetragonal space group P4/nmm (No. 129) with a=1139.02(8), c=801.68(6) pm (c/a=0.70) in the Nd3Ni29Si4B10 structure type. Electrical resistivity measurements reveal metallic behavior with a minimum of 700 mu Omega cm and a small residual resistivity ratio of RRR=1.4 indicating a large amount of disorder scattering. The cerium atoms are either in the 4+ or an intermediate valence state with a valence fluctuation temperature far above room temperature. (c) 2013 Published by Elsevier Inc.
C1 [Janka, Oliver; Kauzlarich, Susan M.] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA.
[Baumbach, Ryan E.; Thompson, Joe D.; Bauer, Eric D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Bauer, ED (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM edbauer@lanl.gov; smkauzlarich@ucdavis.edu
RI Janka, Oliver/B-3233-2011;
OI Janka, Oliver/0000-0002-9480-3888; Bauer, Eric/0000-0003-0017-1937
FU NSF [DMR-1100313]; US Department of Energy, Office of Basic Energy
Sciences, Division of Materials Sciences and Engineering; Los Alamos
Laboratory Directed Research and Development program
FX This work was funded by NSF DMR-1100313. Work at Los Alamos National
Laboratory was performed under the auspices of the US Department of
Energy, Office of Basic Energy Sciences, Division of Materials Sciences
and Engineering, PECASE funding from the US DOE, OBES, Division of
Material Science and Engineering, and funded in part by the Los Alamos
Laboratory Directed Research and Development program.
NR 19
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U1 3
U2 15
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0022-4596
J9 J SOLID STATE CHEM
JI J. Solid State Chem.
PD SEP
PY 2013
VL 205
BP 154
EP 159
DI 10.1016/j.jssc.2013.05.041
PG 6
WC Chemistry, Inorganic & Nuclear; Chemistry, Physical
SC Chemistry
GA 210TS
UT WOS:000323858200024
ER
PT J
AU Zhernenkov, M
Fabbris, G
Chmaissem, O
Mitchell, JF
Zheng, H
Haskel, D
AF Zhernenkov, Mikhail
Fabbris, Gilberto
Chmaissem, Omar
Mitchell, J. F.
Zheng, H.
Haskel, Daniel
TI Pressure-induced volume collapse and structural phase transitions in
SrRuO3
SO JOURNAL OF SOLID STATE CHEMISTRY
LA English
DT Article
DE Pv-to-pPv transition; High pressure; X-ray diffraction; Volume collapse;
SrRuO3
ID METAL-INSULATOR TRANSITIONS; QUANTUM CRITICALITY; SINGLE-CRYSTAL;
PEROVSKITES; DIFFRACTION; BEHAVIOR; OXIDES
AB We report on the low temperature (6 K) structural properties of SrRuO3 under quasi-hydrostatic pressure studied by synchrotron X-ray powder diffraction in a diamond anvil cell. First principle calculations predict a first-order perovskite (N) to post-perovskite (pPv) phase transition at similar to 40 GPa accompanied by a 1.9% volume collapse. Our results rule out the occurrence of a pPv phase to 54 GPa. Instead, we find a Pv to monoclinic to triclinic sequence of phase transitions. The monoclinic to triclinic phase transition at similar to 38 GPa is accompanied by a 3.5% volume collapse. X-ray absorption spectroscopy indicates that this volume collapse is not accompanied by a change in Ru valence state. Our results should help guide improvements to theoretical treatments of this and other correlated d-electron systems based on density functional theory. (c) 2013 Elsevier Inc. All rights reserved.
C1 [Zhernenkov, Mikhail; Fabbris, Gilberto; Haskel, Daniel] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
[Fabbris, Gilberto] Washington Univ, Dept Phys, St Louis, MO 63130 USA.
[Chmaissem, Omar] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA.
[Chmaissem, Omar; Mitchell, J. F.; Zheng, H.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Zhernenkov, M (reprint author), Brookhaven Natl Lab, POB 5000, Upton, NY 11973 USA.
EM zherne@bnl.gov
RI Fabbris, Gilberto/F-3244-2011;
OI Fabbris, Gilberto/0000-0001-8278-4985; Zhernenkov,
Mikhail/0000-0003-3604-0672
FU U.S. Department of Energy, Office of Science [DE-AC02-06CH11357]; CIW;
CDAC; UNLV; LLNL; DOE-BES; NSF
FX Work at Argonne National Laboratory is supported by the U.S. Department
of Energy, Office of Science, under contract No. DE-AC02-06CH11357.
HP-CAT is supported by CIW, CDAC, UNLV, LLNL through funding from
DOE-NNSA, DOE-BES and NSF. We would like to thank Brian Toby (ANL) for
the enlightening discussion on powder diffraction results, Sergey
Tkachev (GSECARS, APS, ANL) for his gracious help with gas loading
system, Changyong Park, Dmitri Popov, and Curtis Kenney-Benson for their
help during experiments at HP-CAT and Yang Ding for his valuable advice
regarding the use of Beryllium gaskets in the diamond anvil cell.
NR 36
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U2 40
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0022-4596
J9 J SOLID STATE CHEM
JI J. Solid State Chem.
PD SEP
PY 2013
VL 205
BP 177
EP 182
DI 10.1016/j.jssc.2013.07.002
PG 6
WC Chemistry, Inorganic & Nuclear; Chemistry, Physical
SC Chemistry
GA 210TS
UT WOS:000323858200028
ER
PT J
AU Bridges, CA
Harrison, KL
Unocic, RR
Idrobo, JC
Paranthaman, MP
Manthiram, A
AF Bridges, Craig A.
Harrison, Katharine L.
Unocic, Raymond R.
Idrobo, Juan-Carlos
Paranthaman, M. Parans
Manthiram, Arumugam
TI Defect chemistry of phospho-olivine nanoparticles synthesized by a
microwave-assisted solvothermal process
SO JOURNAL OF SOLID STATE CHEMISTRY
LA English
DT Article
DE Lithium-ion batteries; LiFePO4 cathode; Antisite disorder; Neutron
diffraction
ID LITHIUM IRON PHOSPHATE; HYDROTHERMALLY PREPARED LIFEPO4; DOMINO-CASCADE
MODEL; ION BATTERIES; SURFACE MODIFICATION; ELECTRODE MATERIALS;
ANTISITE DEFECTS; SINGLE-CRYSTALS; LIMPO4 M=MN; DIFFRACTION
AB Nanocrystalline LiFePO4 powders synthesized by a microwave-assisted solvothermal (MW-ST) process have been structurally characterized with a combination of high resolution powder neutron diffraction, synchrotron X-ray diffraction, and aberration-corrected HAADF STEM imaging. A significant level of defects has been found in the samples prepared at 255 and 275 degrees C. These temperatures are significantly higher than what has previously been suggested to be the maximum temperature for defect formation in LiFePO4, so the presence of defects is likely related to the rapid MW-ST synthesis involving a short reaction time (similar to 5 min). A defect model has been tentatively proposed, though it has been shown that powder diffraction data alone cannot conclusively determine the precise defect distribution in LiFePO4 samples. The model is consistent with other literature reports on nanopowders synthesized at low temperatures, in which the unit cell volume is significantly reduced relative to defect-free, micron-sized LiFePO4 powders. Published by Elsevier Inc.
C1 [Bridges, Craig A.; Paranthaman, M. Parans] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
[Unocic, Raymond R.; Idrobo, Juan-Carlos] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Harrison, Katharine L.; Manthiram, Arumugam] Univ Texas Austin, Electrochem Energy Lab, Austin, TX 78712 USA.
[Harrison, Katharine L.; Manthiram, Arumugam] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA.
RP Bridges, CA (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM bridgesca@ornl.gov
RI Idrobo, Juan/H-4896-2015; Paranthaman, Mariappan/N-3866-2015;
OI Idrobo, Juan/0000-0001-7483-9034; Paranthaman,
Mariappan/0000-0003-3009-8531; Unocic, Raymond/0000-0002-1777-8228
FU U.S. Department of Energy, Basic Energy Sciences, Materials Sciences and
Engineering Division, at the University of Texas at Austin
[DE-SC0005397]; U.S. Department of Energy, Basic Energy Sciences,
Materials Sciences and Engineering Division, at Oak Ridge National
Laboratory (ORNL); National Science Foundation; Scientific User
Facilities Division, Office of Basic Energy Sciences, U.S. Department of
Energy
FX This work was supported by the U.S. Department of Energy, Basic Energy
Sciences, Materials Sciences and Engineering Division, at the University
of Texas at Austin (under award number DE-SC0005397) and at Oak Ridge
National Laboratory (ORNL). We acknowledge Ashfia Huq and Jason Hodges
for assistance with collection of powder neutron diffraction data at the
Spallation Neutron Source (SNS). Research at ORNL's SNS, Center of
Nano-phase Materials Sciences (CNMS) and Shared Research Equipment
(ShaRE) User Facility Programs were sponsored by the Scientific User
Facilities Division, Office of Basic Energy Sciences, U.S. Department of
Energy. One of the authors (KH) thanks the National Science Foundation
for the award of a Graduate Research Fellowship.
NR 49
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U1 2
U2 57
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0022-4596
J9 J SOLID STATE CHEM
JI J. Solid State Chem.
PD SEP
PY 2013
VL 205
BP 197
EP 204
DI 10.1016/j.jssc.2013.07.011
PG 8
WC Chemistry, Inorganic & Nuclear; Chemistry, Physical
SC Chemistry
GA 210TS
UT WOS:000323858200031
ER
PT J
AU Logvenov, G
Gozar, A
Bozovic, I
AF Logvenov, G.
Gozar, A.
Bozovic, I.
TI High Temperature Interface Superconductivity
SO JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
LA English
DT Article; Proceedings Paper
CT 4th International Conference on Fundamental Problems of High Temperature
Superconductivity (FPS)
CY OCT 03-07, 2011
CL Moscow-Zvenigorod, RUSSIA
DE High temperature interface superconductivity; Molecular beam epitaxy;
Oxides heterostructures
ID LA2-XSRXCUO4; INSULATOR; OXIDES
AB We use atomic-layer-by-layer molecular beam epitaxy (ALL-MBE) to deposit atomically smooth films of cuprate superconductors and other complex oxides. Bilayers, multilayers, and superlattices are grown with atomic precision and virtually perfect interfaces. This has allowed a discovery and in-depth study of high-temperature interface superconductivity, which is briefly reviewed here.
C1 [Logvenov, G.] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany.
[Gozar, A.; Bozovic, I.] Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Logvenov, G (reprint author), Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany.
EM G.Logvenov@fkf.mpg.de
FU US DOE [MA-509-MACA]
FX The experiments at BNL were done in collaboration with A. T. Bollinger,
V.Y. Butko, C. Deville Caveline, and J. Seo, and the numerical
simulation in collaboration with Z. Radovic and N. Bozovic. This
research has been supported by US DOE Grant MA-509-MACA.
NR 18
TC 2
Z9 3
U1 5
U2 50
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1557-1939
EI 1557-1947
J9 J SUPERCOND NOV MAGN
JI J. Supercond. Nov. Magn
PD SEP
PY 2013
VL 26
IS 9
BP 2863
EP 2865
DI 10.1007/s10948-013-2215-3
PG 3
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 211RE
UT WOS:000323926600017
ER
PT J
AU Khaymovich, IM
Chtchelkatchev, NM
Vinokur, VM
AF Khaymovich, I. M.
Chtchelkatchev, N. M.
Vinokur, V. M.
TI Interplay of Superconductivity and Topological Order in HgTe Quantum
Wells
SO JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
LA English
DT Article; Proceedings Paper
CT 4th International Conference on Fundamental Problems of High Temperature
Superconductivity (FPS)
CY OCT 03-07, 2011
CL Moscow-Zvenigorod, RUSSIA
DE Topological insulators; Superconductivity
AB Using the microscopic tight-binding equations we derive the effective Hamiltonian for the double-layer comprised of the two-dimensional topological insulator (TI) coupled to the s-wave isotropic superconductor (SC), and show that it contains terms describing mixing of the TI sub-band branches by the superconducting correlations induced by the proximity effect. We find that the proximity effect breaks down the rotational symmetry of the TI spectrum. We show that the edge states not only acquire the gap, as follows from the standard theory, but can also become localized by the Andreev-backscattering mechanism in a small coupling regime. In a strong coupling regime the edge states merge with the bulk states, and the TI transforms into an anisotropic narrow-gap semiconductor.
C1 [Khaymovich, I. M.] RAS, IPM, Nizhnii Novgorod 603950, Russia.
[Chtchelkatchev, N. M.] RAS, HPPI & ITP LD Landau, Moscow 117940, Russia.
[Vinokur, V. M.] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Chtchelkatchev, NM (reprint author), RAS, HPPI & ITP LD Landau, Moscow 117940, Russia.
EM n.chtchelkatchev@gmail.com
RI Chtchelkatchev, Nikolay/L-1273-2013; Khaymovich, Ivan/F-2695-2013
OI Chtchelkatchev, Nikolay/0000-0002-7242-1483; Khaymovich,
Ivan/0000-0003-2160-5984
NR 5
TC 1
Z9 1
U1 2
U2 9
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1557-1939
EI 1557-1947
J9 J SUPERCOND NOV MAGN
JI J. Supercond. Nov. Magn
PD SEP
PY 2013
VL 26
IS 9
BP 2881
EP 2883
DI 10.1007/s10948-013-2207-3
PG 3
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 211RE
UT WOS:000323926600022
ER
PT J
AU Kobayashi, R
Ogane, Y
Hirai, D
Nishioka, T
Matsumura, M
Kawamura, Y
Matsubayashi, K
Uwatoko, Y
Tanida, H
Sera, M
AF Kobayashi, Riki
Ogane, Yuta
Hirai, Daishi
Nishioka, Takashi
Matsumura, Masahiro
Kawamura, Yukihiro
Matsubayashi, Kazuyuki
Uwatoko, Yoshiya
Tanida, Hiroshi
Sera, Masafumi
TI Change in Unusual Magnetic Properties by Rh Substitution in CeRu2Al10
SO JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
LA English
DT Article
DE CeRu2Al10; Ce(Ru1-xRhx)(2)Al-10; Kondo semiconductor; Rh substitution
effect; electron doping; specific heat; magnetic susceptibility;
electrical resistivity; Hall resistivity; T-x phase diagram
ID PRESSURE; GAP
AB We have studied the Rh substitution (electron doping) effect in the Kondo semiconductor CeRu2Al10, which orders antiferromagnetically below (T-0 = 27 K), by specific heat C, magnetic susceptibility chi, electrical resistivity rho, and Hall resistivity rho(H) measurements of Ce(Ru1-xRhx)(2)Al-10 (x = 0: 12, 0.2, 0.23, 0.34) single crystals. T-0 decreases monotonically with an increase in x. In addition, new anomalies occur at T-1 similar to 6.5 and T-2 similar to 3.0 K in all the Rh substitution samples. However, T-1 and T-2 are almost independent of x. The shape of the anomaly at T-0 in chi(T) changes with Rh substitution, which implies the reorientation of the ordered moment. These phenomena indicate that the magnetic properties of CeRu2Al10 are strongly associated with the number of 4d electrons.
C1 [Kobayashi, Riki] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA.
[Kobayashi, Riki] Univ Tokyo, Inst Solid State Phys, Neutron Sci Lab, Tokai, Ibaraki 3191106, Japan.
[Kobayashi, Riki; Ogane, Yuta; Hirai, Daishi; Nishioka, Takashi; Matsumura, Masahiro; Kawamura, Yukihiro] Kochi Univ, Grad Sch Integrated Arts & Sci, Kochi 7808520, Japan.
[Kawamura, Yukihiro] Muroran Inst Technol, Muroran, Hokkaido 0508585, Japan.
[Matsubayashi, Kazuyuki; Uwatoko, Yoshiya] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan.
[Tanida, Hiroshi; Sera, Masafumi] Hiroshima Univ, ADSM, Dept Quantum Matter, Hiroshima 7398530, Japan.
RP Kobayashi, R (reprint author), Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA.
EM kobayashi.riki@issp.u-tokyo.ac.jp
RI Tanida, Hiroshi/E-1878-2013; Matsubayashi, Kazuyuki/F-7696-2013
FU Ministry of Education, Culture, Sports, Science and Technology, Japan;
Comprehensive Support Programs for Creation of Regional Innovation of
Japan Science and Technology Agency (JST)
FX We would like to thank Professor H. Yoshizawa for the use of PPMS and
Mr. T. Matsuzaki for the composition analysis using an EPMA device. We
also thank Dr. K. Kaneko, Dr. S. Wakimoto, and Dr. M. Takeda for
valuable discussions and suggestions. This work was partially supported
by a Grant-in-Aid for Scientific Research (C) from the Ministry of
Education, Culture, Sports, Science and Technology, Japan and the
Comprehensive Support Programs for Creation of Regional Innovation of
Japan Science and Technology Agency (JST).
NR 43
TC 16
Z9 16
U1 1
U2 17
PU PHYSICAL SOC JAPAN
PI TOKYO
PA YUSHIMA URBAN BUILDING 5F, 2-31-22 YUSHIMA, BUNKYO-KU, TOKYO, 113-0034,
JAPAN
SN 0031-9015
J9 J PHYS SOC JPN
JI J. Phys. Soc. Jpn.
PD SEP
PY 2013
VL 82
IS 9
AR 093702
DI 10.7566/JPSJ.82.093702
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 210GS
UT WOS:000323819500003
ER
PT J
AU Tong, S
Ma, BH
Narayanan, M
Liu, SS
Balachandran, U
Shi, DL
AF Tong, Sheng
Ma, Beihai
Narayanan, Manoj
Liu, Shanshan
Balachandran, Uthamalingam
Shi, Donglu
TI Dielectric behavior of lead lanthanum zirconate titanate thin films
deposited on different electrodes/substrates
SO MATERIALS LETTERS
LA English
DT Article
DE Thin films; Ferroelectrics; Dielectrics; Deposition; X-ray techniques
ID STRESS; ELECTRODES
AB The dielectric properties of lead lanthanum zirconate titanate (PLZT) thin films are investigated on different combinations of bottom electrode (Pt, LaNiO3) and substrate (Ni, Si). The results indicate strong effects of electrode on the permittivity and dielectric loss of these PLZT thin-films capacitors. The substrate-induced thermal strain has a great impact on the temperature dependence of the dielectric behavior. Based on these findings, dielectric applications using PLZT thin films in a wide range of temperature are possible by selecting appropriate electrodes and substrates. (C) 2013 Published by Elsevier B.V.
C1 [Tong, Sheng; Shi, Donglu] Univ Cincinnati, Coll Engn & Appl Sci, Cincinnati, OH 45221 USA.
[Tong, Sheng; Ma, Beihai; Narayanan, Manoj; Liu, Shanshan; Balachandran, Uthamalingam] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA.
[Tong, Sheng] Argonne Natl Lab, Nanosci & Technol Div, Argonne, IL 60439 USA.
RP Tong, S (reprint author), Argonne Natl Lab, Nanosci & Technol Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM shengtg@mail.uc.edu; shid@ucmail.uc.edu
RI Tong, Sheng/A-2129-2011; Ma, Beihai/I-1674-2013
OI Tong, Sheng/0000-0003-0355-7368; Ma, Beihai/0000-0003-3557-2773
FU US Department of Energy, Vehicle Technologies Program
[DE-AC02-06CH11357]
FX This work was supported by the US Department of Energy, Vehicle
Technologies Program, under Contract DE-AC02-06CH11357.
NR 29
TC 2
Z9 2
U1 2
U2 30
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-577X
J9 MATER LETT
JI Mater. Lett.
PD SEP 1
PY 2013
VL 106
BP 405
EP 408
DI 10.1016/j.matlet.2013.05.068
PG 4
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 195DM
UT WOS:000322682500106
ER
PT J
AU Hu, HY
Lin, H
Zheng, W
Tomanicek, SJ
Johs, A
Feng, XB
Elias, DA
Liang, LY
Gu, BH
AF Hu, Haiyan
Lin, Hui
Zheng, Wang
Tomanicek, Stephen J.
Johs, Alexander
Feng, Xinbin
Elias, Dwayne A.
Liang, Liyuan
Gu, Baohua
TI Oxidation and methylation of dissolved elemental mercury by anaerobic
bacteria
SO NATURE GEOSCIENCE
LA English
DT Article
ID DESULFOVIBRIO-DESULFURICANS ND132; NATURAL ORGANIC-MATTER; ANOXIC
ENVIRONMENTS; GASEOUS MERCURY; REDUCTION; WATERS; COMPLEXATION; HG(0);
VAPOR
AB Methylmercury is a neurotoxin that poses significant health risks to humans. Some anaerobic sulphate- and iron-reducing bacteria can methylate oxidized forms of mercury, generating methylmercury(1-4). One strain of sulphate-reducing bacteria (Desulfovibrio desulphuricans ND132) can also methylate elemental mercury(5). The prevalence of this trait among different bacterial strains and species remains unclear, however. Here, we compare the ability of two strains of the sulphate-reducing bacterium Desulfovibrio and one strain of the iron-reducing bacterium Geobacter to oxidize and methylate elemental mercury in a series of laboratory incubations. Experiments were carried out under dark, anaerobic conditions, in the presence of environmentally relevant concentrations of elemental mercury. We report differences in the ability of these organisms to oxidize and methylate elemental mercury. In line with recent findings(5), we show that D. desulphuricans ND132 can both oxidize and methylate elemental mercury. We find that the rate of methylation of elemental mercury is about one-third the rate of methylation of oxidized mercury. We also show that Desulfovibrio alaskensis G20 can oxidize, but not methylate, elemental mercury. Geobacter sulphurreducens PCA is able to oxidize and methylate elemental mercury in the presence of cysteine. We suggest that the activity of methylating and non-methylating bacteria may together enhance the formation of methylmercury in anaerobic environments.
C1 [Hu, Haiyan; Lin, Hui; Zheng, Wang; Tomanicek, Stephen J.; Johs, Alexander; Liang, Liyuan; Gu, Baohua] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37830 USA.
[Hu, Haiyan; Feng, Xinbin] Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China.
[Elias, Dwayne A.] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN 37831 USA.
RP Gu, BH (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37830 USA.
EM gub1@ornl.gov
RI Johs, Alexander/F-1229-2011; Elias, Dwayne/B-5190-2011; Feng,
Xinbin/F-4512-2011; Liang, Liyuan/O-7213-2014; Gu, Baohua/B-9511-2012
OI Johs, Alexander/0000-0003-0098-2254; Elias, Dwayne/0000-0002-4469-6391;
Feng, Xinbin/0000-0002-7462-8998; Liang, Liyuan/0000-0003-1338-0324; Gu,
Baohua/0000-0002-7299-2956
FU Office of Biological and Environmental Research, Office of Science, US
Department of Energy (DOE) as part of the Mercury Science Focus Area
Program at ORNL; DOE [DE-AC05-00OR22725]
FX We thank X. Yin, Y. Qian, R. Jr Hurt and M. Drake at Oak Ridge National
Laboratory (ORNL) and H. Guo at the University of Tennessee for
technical assistance and support. This research was sponsored by the
Office of Biological and Environmental Research, Office of Science, US
Department of Energy (DOE) as part of the Mercury Science Focus Area
Program at ORNL, which is managed by UT-Battelle LLC for the DOE under
contract DE-AC05-00OR22725.
NR 30
TC 42
Z9 44
U1 18
U2 176
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1752-0894
J9 NAT GEOSCI
JI Nat. Geosci.
PD SEP
PY 2013
VL 6
IS 9
BP 751
EP 754
DI 10.1038/NGEO1894
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 208YA
UT WOS:000323717500018
ER
PT J
AU Drosg, M
Lisowski, PW
AF Drosg, M.
Lisowski, P. W.
TI Neutron Interactions with He-3 Revisited-II: Nonelastic Cross Sections
in the Mega-Electron-Volt Range
SO NUCLEAR SCIENCE AND ENGINEERING
LA English
DT Article
ID ELASTIC-SCATTERING; HE3
AB Reliable nonelastic cross-section measurements of fast neutrons with He-3 are sparse. In the energy range up to 40 MeV, the data are dominated by unpublished nonelastic n-He-3 values derived from measurements made in 1982. As mentioned elsewhere, n-He-3 elastic cross-section data reported in the same report had not been corrected for the outgoing neutron attenuation even though the sample size was >7 mol. To check the database of existing nonelastic n-He-3 cross-section data, and in particular those from 1982, a detailed balance calculation of time-reversed charged-particle data was performed. Because there are few existing independent data, we provide an updated detailed balance analysis in the energy range up to 31 MeV for both He-3(n,p)H-3 and He-3(n,d)H-2, supplying accurate absolute-angle-dependent differential cross sections. Subtracting the integrals of these and the elastic cross sections from the total provides a prediction for the sum of the He-3(n,2n)2p and He-3(n,n + p)H-2 cross sections. The relevant experimental data are compared with their time-reversed counterparts.
C1 [Drosg, M.] Univ Vienna, Vienna, Austria.
[Lisowski, P. W.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Drosg, M (reprint author), Univ Vienna, Vienna, Austria.
EM lisowski@lanl.gov
FU University of Vienna
FX Thanks are due B. Hoop, who made us aware of the nonlinearity of the
charge collection in proportional counters. One of the authors (M. D.)
acknowledges support from the University of Vienna.
NR 28
TC 2
Z9 2
U1 1
U2 1
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5639
J9 NUCL SCI ENG
JI Nucl. Sci. Eng.
PD SEP
PY 2013
VL 175
IS 1
BP 19
EP 27
PG 9
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NC
UT WOS:000323913900002
ER
PT J
AU Favorite, JA
AF Favorite, Jeffrey A.
TI Nonspherical Perturbations of Spherical Geometries in Transport Theory
SO NUCLEAR SCIENCE AND ENGINEERING
LA English
DT Article
ID INTERNAL INTERFACE PERTURBATIONS
AB It is often desirable to solve radiation transport problems in one-dimensional spherical geometries even if the actual object being modeled is not spherical. It may be possible to use perturbation theory to account for the difference between the real multidimensional system and the spherical approximation. This idea is tested using uncollided as well as multigroup inhomogeneous transport problems with upscattering. Asymmetric and nonuniform perturbations are made to the shielding (not the source) of spherical geometries, including transformations from a sphere to a cube (the surface transformation function is derived), and Schwinger, Roussopolos, and combined perturbation estimates are applied. For uncollided fluxes, perturbation theory, particularly the Schwinger estimate, worked very well when the response of interest was the flux measured at a symmetric spherical 4 pi detector external to the geometry, but perturbation theory did not work well when the response of interest was the flux measured at a single external point (unless extra care was taken to account for geometric effects). For neutron-induced gamma-ray line fluxes, the Roussopolos estimate worked well when the response of interest was the flux measured at an external 4 pi detector or an external point detector.
C1 Los Alamos Natl Lab, Computat Phys X CP Div, Los Alamos, NM 87545 USA.
RP Favorite, JA (reprint author), Los Alamos Natl Lab, Computat Phys X CP Div, MS F663, Los Alamos, NM 87545 USA.
EM fave@lanl.gov
NR 29
TC 1
Z9 1
U1 0
U2 0
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5639
J9 NUCL SCI ENG
JI Nucl. Sci. Eng.
PD SEP
PY 2013
VL 175
IS 1
BP 44
EP 69
PG 26
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NC
UT WOS:000323913900004
ER
PT J
AU Zhang, DK
Rahnema, F
Ougouag, AM
AF Zhang, Dingkang
Rahnema, Farzad
Ougouag, Abderrafi M.
TI A Local Incident Flux Response Expansion Transport Method for Coupling
to the Diffusion Method in Cylindrical Geometry
SO NUCLEAR SCIENCE AND ENGINEERING
LA English
DT Article
ID SIMULATIONS
AB A local incident flux response expansion transport method is developed to generate transport solutions for coupling to diffusion theory codes regardless of their solution method (e.g., fine mesh, nodal, response based, finite element, etc.) for reactor core calculations in both two-dimensional (2-D) and three-dimensional (3-D) cylindrical geometries. In this approach, a Monte Carlo method is first used to precompute the local transport solution (i.e., response function library) for each unique transport coarse node, in which diffusion theory is not valid due to strong transport effects. The response function library is then used to iteratively determine the albedo coefficients on the diffusion-transport interfaces, which are then used as the coupling parameters within the diffusion code. This interface coupling technique allows a seamless integration of the transport and diffusion methods. The new method retains the detailed heterogeneity of the transport nodes and naturally constructs any local solution within them by a simple superposition of local responses to all incoming fluxes from the contiguous coarse nodes. A new technique is also developed for coupling to fine-mesh diffusion methods/codes. The local transport method/module is tested in 2-D and 3-D pebble-bed reactor benchmark problems consisting of an inner reflector, an annular fuel region, and a controlled outer reflector. It is found that the results predicted by the transport module agree very well with the reference fluxes calculated directly by MCNP in both benchmark problems.
C1 [Zhang, Dingkang; Rahnema, Farzad] Georgia Inst Technol, Nucl & Radiol Engn Program, Atlanta, GA 30332 USA.
[Zhang, Dingkang; Rahnema, Farzad] Georgia Inst Technol, Med Phys Program, Atlanta, GA 30332 USA.
[Ougouag, Abderrafi M.] Idaho Natl Lab, Idaho Falls, ID 83401 USA.
RP Zhang, DK (reprint author), Georgia Inst Technol, Nucl & Radiol Engn Program, 770 State St, Atlanta, GA 30332 USA.
EM farzad@gatech.edu
OI Ougouag, Abderrafi/0000-0003-4436-380X
FU U.S. Department of Energy under the Nuclear Energy Research Initiative
[DE-FC07-07ID14821]
FX This work was supported by grant DE-FC07-07ID14821 from the U.S.
Department of Energy under the Nuclear Energy Research Initiative.
NR 14
TC 0
Z9 0
U1 0
U2 1
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5639
EI 1943-748X
J9 NUCL SCI ENG
JI Nucl. Sci. Eng.
PD SEP
PY 2013
VL 175
IS 1
BP 70
EP 80
PG 11
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NC
UT WOS:000323913900005
ER
PT J
AU Rising, ME
Talou, P
Kawano, T
Prinja, AK
AF Rising, M. E.
Talou, P.
Kawano, T.
Prinja, A. K.
TI Evaluation and Uncertainty Quantification of Prompt Fission Neutron
Spectra of Uranium and Plutonium Isotopes
SO NUCLEAR SCIENCE AND ENGINEERING
LA English
DT Article
ID NUCLEAR-DATA; ENERGY; U-235; SCIENCE
AB The prompt fission neutron spectra (PFNS) of the low-incident-energy neutron-induced fission reactions n + U229-238 and n + Pu235-242 have been systematically evaluated using differential experimental data and the Los Alamos model (LA model). Using the first-order, linear Kalman filter, the LA model parameters are constrained using the experimental data and an evaluation of the PFNS and its uncertainties across a suite of isotopes' results. Correlations between isotopes of each actinide are presented through the model parameter correlations, and the resulting evaluations can be used to fill in inconsistencies within the ENDF/B-VII.1 library where PFNS data are scarce or in need of an update.
C1 [Rising, M. E.; Talou, P.; Kawano, T.] Los Alamos Natl Lab, Nucl & Particle Phys Astrophys & Cosmol Theoret D, Los Alamos, NM 87545 USA.
[Rising, M. E.; Prinja, A. K.] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA.
RP Rising, ME (reprint author), Los Alamos Natl Lab, Nucl & Particle Phys Astrophys & Cosmol Theoret D, POB 1663, Los Alamos, NM 87545 USA.
EM mrising@lanl.gov
NR 37
TC 14
Z9 14
U1 0
U2 7
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5639
EI 1943-748X
J9 NUCL SCI ENG
JI Nucl. Sci. Eng.
PD SEP
PY 2013
VL 175
IS 1
BP 81
EP 93
PG 13
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 211NC
UT WOS:000323913900006
ER
PT J
AU Ilas, G
AF Ilas, Germina
TI SPECIAL ISSUE ON THE INTERNATIONAL TOPICAL MEETING ON REACTOR PHYSICS
PHYSOR 2012 FOREWORD
SO NUCLEAR TECHNOLOGY
LA English
DT Editorial Material
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Ilas, G (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
NR 0
TC 0
Z9 0
U1 1
U2 4
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
J9 NUCL TECHNOL
JI Nucl. Technol.
PD SEP
PY 2013
VL 183
IS 3
BP 271
EP 271
PG 1
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 208OM
UT WOS:000323689000001
ER
PT J
AU Cisneros, AT
Ilas, D
AF Cisneros, Anselmo T.
Ilas, Dan
TI NEUTRONICS AND DEPLETION METHODS FOR MULTIBATCH FLUORIDE SALT-COOLED
HIGH-TEMPERATURE REACTORS WITH SLAB FUEL GEOMETRY
SO NUCLEAR TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT International Topical Meeting on Reactor Physics
CY APR 15-20, 2012
CL Oak Ridge Knoxville Local Sect ANS, Knoxville, TN
HO Oak Ridge Knoxville Local Sect ANS
DE linear reactivity model; reactivity-equivalent physical transformation;
fluoride salt-cooled high-temperature reactor
AB The Advanced High-Temperature Reactor (AHTR) is a 3400-MW(thermal) fluoride salt cooled high-temperature reactor that uses coated particle fuel compacted into slabs rather than spherical or cylindrical fuel compacts. Simplified methods are required for parametric design studies to perform burnup analysis on the entire feasible design space. These simplifications include fuel homogenization techniques to increase the speed of neutron transport calculations and equilibrium depletion analysis methods to analyze systems with multibatch fuel management schemes.
This paper presents three elements of significant novelty. First, the reactivity-equivalent physical transformation (RPT) methodology usually applied in systems with cylindrical and spherical geometries has been extended to slab geometries. Second, implementing this RPT homogenization, a Monte Carlo based depletion methodology was developed to search for the maximum discharge burnup in a multibatch system by iteratively estimating the beginning of equilibrium cycle composition and sampling different discharge burnups. This iterative equilibrium depletion search method fully defines an equilibrium fuel cycle (k(eff), power, flux, and composition evolutions) but is computationally demanding. Therefore, an analytical method, the nonlinear reactivity model, was developed so that single-batch depletion results could be extrapolated to estimate the maximum discharge burnup in systems with multibatch fuel management schemes.
C1 [Cisneros, Anselmo T.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Ilas, Dan] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM tommycisneros@berkeley.edu
OI Ilas, Dan/0000-0002-4971-9476
FU U.S. Department of Energy (DOE) Nuclear Energy University Programs
Graduate Fellowship [DE-AC05-00OR22725]; Nuclear Engineering Science
Laboratory Synthesis (NESLS) internship program at Oak Ridge National
Laboratory (ORNL); UT-Battelle LLC [DE-AC05-00OR22725]; DOE
FX This material is based on previous work supported by a U.S. Department
of Energy (DOE) Nuclear Energy University Programs Graduate Fellowship.
Any opinions, findings, conclusions, or recommendations expressed in
this publication are those of the author(s) and do not necessarily
reflect the views of the Department of Energy.; This manuscript has been
authored by UT-Battelle LLC under contract DE-AC05-00OR22725 with the
DOE.; The work performed by the first author was supported by the
Nuclear Engineering Science Laboratory Synthesis (NESLS) internship
program at Oak Ridge National Laboratory (ORNL). The AHTR concept is
under development at ORNL as part of the DOE's Advanced Reactor Concepts
program. The authors acknowledge the suggestions of J. C. Gehin and B.
J. Ade during the ORNL internal review process.
NR 12
TC 1
Z9 1
U1 0
U2 8
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
EI 1943-7471
J9 NUCL TECHNOL
JI Nucl. Technol.
PD SEP
PY 2013
VL 183
IS 3
BP 331
EP 340
PG 10
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 208OM
UT WOS:000323689000007
ER
PT J
AU Ilas, D
AF Ilas, Dan
TI SCALE CODE VALIDATION FOR PRISMATIC HIGH-TEMPERATURE GAS-COOLED REACTORS
SO NUCLEAR TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT International Topical Meeting on Reactor Physics
CY APR 15-20, 2012
CL Oak Ridge Knoxville Local Sect ANS, Knoxville, TN
HO Oak Ridge Knoxville Local Sect ANS
DE high-temperature gas-cooled reactor; High Temperature Engineering Test
Reactor; SCALE
AB Using experimental data published in the International Handbook of Evaluated Reactor Physics Benchmark Experiments for the fresh cold core of the High Temperature Engineering Test Reactor, a comprehensive validation study has been carried out to assess the performance of the SCALE code system for analysis of high-temperature gas-cooled reactor configurations. This paper describes part of the results of that effort. The studies performed included criticality evaluations for the full core and for the annular cores realized during the fuel loading, as well as calculations and comparisons for excess reactivity, shutdown margin, control rod worths, temperature coefficient of reactivity, and reaction rate distributions. Comparisons of the SCALE results with both experimental values and MCNP-calculated values are presented. The comparisons show that the SCALE calculated results, obtained with both multi group and continuous energy cross sections, are in reasonable agreement with the experimental data and the MCNP predictions.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM ilasd@ornl.gov
OI Ilas, Dan/0000-0002-4971-9476
FU U.S. Nuclear Regulatory Commission Office of Research; UT-Battelle LLC
[DE-AC05-00OR22725]
FX The work described in this paper was sponsored by the U.S. Nuclear
Regulatory Commission Office of Research. This paper has been authored
by UT-Battelle LLC under contract DE-AC05-00OR22725 with the U.S.
Department of Energy.
NR 7
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U2 2
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
EI 1943-7471
J9 NUCL TECHNOL
JI Nucl. Technol.
PD SEP
PY 2013
VL 183
IS 3
BP 379
EP 390
PG 12
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 208OM
UT WOS:000323689000011
ER
PT J
AU Kelly, R
Ilas, D
AF Kelly, Ryan
Ilas, Dan
TI VERIFICATION OF A DEPLETION METHOD IN SCALE FOR THE ADVANCED
HIGH-TEMPERATURE REACTOR
SO NUCLEAR TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT International Topical Meeting on Reactor Physics
CY APR 15-20, 2012
CL Oak Ridge Knoxville Local Sect ANS, Knoxville, TN
HO Oak Ridge Knoxville Local Sect ANS
DE SCALE; VESTA; AHTR
AB This study describes a new approach employing the Dancoff correction method to model the TRISO-based fuel form used by the Advanced High-Temperature Reactor (AHTR) design concept. The Dancoff correction method is used to perform isotope depletion analysis using the TRITON sequence of SCALE and is verified by code-to-code comparisons. The current AHTR fuel design has TRISO particles concentrated along the edges of a slab fuel element. This geometry prevented the use of the DOUBLEHET treatment, previously developed in SCALE to model spherical and cylindrical fuel. The new method permits fuel depletion on complicated geometries that traditionally can be handled only by continuous-energy-based depletion code systems. The method was initially tested on a fuel configuration typical of the Next Generation Nuclear Plant, where DOUBLEHET treatment is possible. A confirmatory study was performed on the AHTR reference core geometry using the VESTA code, which uses the continuous-energy MCNP5 code as a transport solver and ORIGEN2.2 code for depletion calculations. Comparisons of the results indicate good agreement of whole-core characteristics, such as the multiplication factor and the isotopics, including their spatial distribution. Key isotopes analyzed included U-235, Pu-239, Pu-240, and Pu-241. The results from this study indicate that the Dancoff factor method can generate estimates of core characteristics with reasonable precision for scoping studies of configurations where DOUBLEHET treatment cannot be performed.
C1 [Kelly, Ryan] Texas A&M Univ, Dept Nucl Engn, College Stn, TX 77843 USA.
[Ilas, Dan] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM kell2443@tamu.edu
OI Ilas, Dan/0000-0002-4971-9476
FU National Nuclear Security Administration; UT-Battelle LLC
[DE-AC05-00OR22725]
FX The first author would like to acknowledge the help of T. Cisneros in
developing his understanding of the RPT method, and for his advice on
various aspects of the VESTA model. The development of the VESTA AHTR
model and the inter-comparisons of the SCALE depletion procedure based
on the Dancoff factor with the results of the VESTA simulations were
performed at ORNL during a safeguards internship sponsored by the
National Nuclear Security Administration. The AHTR concept is under
development at ORNL as part of the U.S. Department of Energy (DOE)
Advanced Reactor Concepts program. I. Maldonado of University of
Tennessee in Knoxville is acknowledged for allowing the use of the
computer cluster at the Department of Nuclear Engineering for VESTA
computations.; This manuscript has been authored by UT-Battelle LLC
under contract DE-AC05-00OR22725 with the DOE.
NR 7
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U1 0
U2 2
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
EI 1943-7471
J9 NUCL TECHNOL
JI Nucl. Technol.
PD SEP
PY 2013
VL 183
IS 3
BP 391
EP 397
PG 7
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 208OM
UT WOS:000323689000012
ER
PT J
AU Tak, T
Lee, D
Kim, TK
AF Tak, Taewoo
Lee, Deokjung
Kim, T. K.
TI DESIGN OF ULTRALONG-CYCLE FAST REACTOR EMPLOYING BREED-AND-BURN STRATEGY
SO NUCLEAR TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT International Topical Meeting on Reactor Physics
CY APR 15-20, 2012
CL Oak Ridge Knoxville Local Sect ANS, Knoxville, TN
HO Oak Ridge Knoxville Local Sect ANS
DE breed and burn; ultralong-cycle fast reactor
ID CANDLE; CODE
AB A new design of ultralong-cycle fast reactor (UCFR) with power rate of 1000 MW (electric) has been developed based on the strategy of breed and burn. The bottom region of the core with low-enriched uranium plays a role of igniter of the core burning and the upper natural uranium region acts as a blanket for breeding. Fissile materials are bred in the blanket and the active core moves upward at a speed of 5.0 cm/year. Through the core depletion calculation using Monte Carlo code McCARD, it is confirmed that a full-power operation of 60 years without refueling is feasible with respect to nuclear isotopics and criticality. Core performance characteristics have been evaluated in terms of axial/radial power shapes, reactivity feedback coefficients, etc. This design will serve as a base model for further design study of UCFRs using light water reactor spent fuels in the blanket region.
C1 [Tak, Taewoo; Lee, Deokjung] Ulsan Natl Inst Sci & Technol, Ulsan 689798, South Korea.
[Kim, T. K.] Argonne Natl Lab, Argonne, IL 60564 USA.
EM deokjung@unist.ac.kr
OI Lee, Deokjung/0000-0002-3935-5058
FU National Research Foundation of Korea; Korea government (MEST)
FX This work was supported by National Research Foundation of Korea grant
funded by the Korea government (MEST).
NR 24
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U1 0
U2 5
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
EI 1943-7471
J9 NUCL TECHNOL
JI Nucl. Technol.
PD SEP
PY 2013
VL 183
IS 3
BP 427
EP 435
PG 9
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 208OM
UT WOS:000323689000015
ER
PT J
AU McGraw, C
Ilas, G
AF McGraw, Carolyn
Ilas, Germina
TI PRESSURIZED WATER REACTOR ENDF/B-VII CROSS-SECTION LIBRARIES FOR
ORIGEN-ARP
SO NUCLEAR TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT International Topical Meeting on Reactor Physics
CY APR 15-20, 2012
CL Oak Ridge Knoxville Local Sect ANS, Knoxville, TN
HO Oak Ridge Knoxville Local Sect ANS
DE pressurized water reactor; SCALE; ORIGEN
ID ANALYSIS CAPABILITIES; SCALE; DEPLETION
AB New pressurized water reactor (PWR) cross-section libraries were generated for use with the ORIGEN-ARP depletion sequence in the SCALE nuclear analysis code system. These libraries are based on ENDF/B-VILO nuclear data and were generated using the two-dimensional depletion sequence, TRITON/NEWT, in SCALE 6.1. The libraries contain multiple burnup-dependent cross sections for seven PWR fuel designs, with enrichments ranging from 1.5 to 6 wt% U-235 and burnups from 0 to 90 GW(d)/tonne U. The computational methodology and studies performed to establish an optimal depletion model for cross-section library generation are discussed in this paper. Verification against detailed TRITON simulations for the considered assembly designs showed that depletion calculations performed in ORIGEN-ARP with the pregenerated libraries provide results similar to those obtained with direct TRITON depletion while greatly reducing the computation time. Validation of the libraries, carried out using radiochemical assay measurements and decay heat measurements for PWR spent fuel, showed good agreement between calculated and experimental data.
C1 [McGraw, Carolyn] Texas A&M Univ, College Stn, TX 77840 USA.
[Ilas, Germina] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM car3262@tamu.edu
FU Nuclear Engineering Science Laboratory Synthesis internship program at
Oak Ridge National Laboratory; UT-Battelle LLC [DE-AC05-00OR22725]
FX The first author would like to thank the Nuclear Engineering Science
Laboratory Synthesis internship program at Oak Ridge National Laboratory
for funding her work.; This manuscript has been authored by UT-Battelle
LLC under contract DE-AC05-00OR22725 with the U.S. Department of Energy.
NR 16
TC 0
Z9 0
U1 0
U2 4
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
EI 1943-7471
J9 NUCL TECHNOL
JI Nucl. Technol.
PD SEP
PY 2013
VL 183
IS 3
BP 436
EP 445
PG 10
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 208OM
UT WOS:000323689000016
ER
PT J
AU Williams, ML
Ilas, G
Jessee, MA
Rearden, BT
Wiarda, D
Zwermann, W
Gallner, L
Klein, M
Krzykacz-Hausmann, B
Pautz, A
AF Williams, M. L.
Ilas, G.
Jessee, M. A.
Rearden, B. T.
Wiarda, D.
Zwermann, W.
Gallner, L.
Klein, M.
Krzykacz-Hausmann, B.
Pautz, A.
TI A STATISTICAL SAMPLING METHOD FOR UNCERTAINTY ANALYSIS WITH SCALE AND
XSUSA
SO NUCLEAR TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT International Topical Meeting on Reactor Physics
CY APR 15-20, 2012
CL Oak Ridge Knoxville Local Sect ANS, Knoxville, TN
HO Oak Ridge Knoxville Local Sect ANS
DE uncertainty analysis; statistical sampling; SCALE
ID ANALYSIS CAPABILITIES; SENSITIVITY
AB A new statistical sampling sequence called Sampler has been developed for the SCALE code system. Random values for the input multigroup cross sections are determined by using the XSUSA program to sample uncertainty data provided in the SCALE covariance library. Using these samples, Sampler computes perturbed self-shielded cross sections and propagates the perturbed nuclear data through any specified SCALE analysis sequence, including those for criticality safety, lattice physics with depletion, and shielding calculations. Statistical analysis of the output distributions provides uncertainties and correlations in the desired responses, due to nuclear data uncertainties. The Sampler/XSUSA methodology is described, and example applications are shown for criticality safety and spent-fuel analysis.
C1 [Williams, M. L.; Ilas, G.; Jessee, M. A.; Rearden, B. T.; Wiarda, D.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
EM williamsml@ornl.gov
FU U.S. Nuclear Regulatory Commission Office of Research; German Federal
Ministry of Economics and Technology; UT-Battelle, LLC
[DE-ACO5-00OR22725]
FX This work was sponsored by the U.S. Nuclear Regulatory Commission Office
of Research and the German Federal Ministry of Economics and
Technology.; This manuscript has been authored by UT-Battelle, LLC,
under contract DE-ACO5-00OR22725 with the U.S. Department of Energy.
NR 14
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U1 1
U2 5
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
EI 1943-7471
J9 NUCL TECHNOL
JI Nucl. Technol.
PD SEP
PY 2013
VL 183
IS 3
BP 515
EP 526
PG 12
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 208OM
UT WOS:000323689000023
ER
PT J
AU Zou, L
Zhang, HB
Gehin, J
Kochunas, B
AF Zou, Ling
Zhang, Hongbin
Gehin, Jess
Kochunas, Brendan
TI COUPLED THERMAL-HYDRAULIC/NEUTRONICS/CRUD FRAMEWORK IN PREDICTION OF
CRUD-INDUCED POWER SHIFT PHENOMENON
SO NUCLEAR TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT International Topical Meeting on Reactor Physics
CY APR 15-20, 2012
CL Oak Ridge Knoxville Local Sect ANS, Knoxville, TN
HO Oak Ridge Knoxville Local Sect ANS
DE crud; computational fluid dynamics; neutronics
ID DEPOSITS
AB A thermal-hydraulics (TH)/neutronics/crud multi-physics coupling framework to simulate the crud deposits' impact on crud-induced power shift (CIPS) phenomenon is proposed in this paper. The coupling among three essential physics (i.e., TH, crud, and neutronics) was implemented by coupling the computational fluid dynamics software STAR-CCM+, a newly developed crud module, and the neutronics code DeCART. A typical 3 x 3 pressurized water reactor fuel pin problem was analyzed with this framework and simulation results are presented. Time-dependent results are provided for a 12-month simulation. Simulation results provide the history of crud deposits inventory and their distributions on fuel rods, boron hideout amount inside crud deposits, and power shape changing over time. The obtained results clearly showed the power shape suppression in regions where crud deposits exist, a clear indication of CIPS phenomenon.
C1 [Zou, Ling; Zhang, Hongbin] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
[Gehin, Jess] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Kochunas, Brendan] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA.
EM Ling.Zou@inl.gov
RI Zou, Ling/D-7577-2016;
OI Zou, Ling/0000-0003-0664-0474; Gehin, Jess/0000-0001-8337-9551
FU U.S. Department of Energy, Office of Nuclear Energy, under U.S.
Department of Energy Idaho Operations Offic [DE-AC07-05ID14517]
FX This work was supported by the U.S. Department of Energy, Office of
Nuclear Energy, under U.S. Department of Energy Idaho Operations Office
contract DE-AC07-05ID14517.
NR 29
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U1 0
U2 12
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5450
EI 1943-7471
J9 NUCL TECHNOL
JI Nucl. Technol.
PD SEP
PY 2013
VL 183
IS 3
BP 535
EP 542
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 208OM
UT WOS:000323689000025
ER
PT J
AU McCloy, JS
Potter, BG
AF McCloy, John S.
Potter, Barrett G.
TI Photoluminescence in Chemical Vapor Deposited ZnS: insight into
electronic defects
SO OPTICAL MATERIALS EXPRESS
LA English
DT Article
ID POLYCRYSTALLINE CVD-ZNS; ZINC-SULFIDE; LUMINESCENCE-CENTERS; PRESSURE;
TEMPERATURE; PHOSPHORS; LASERS
AB Photoluminescence spectra taken from chemical vapor deposited (CVD) ZnS are shown to exhibit sub-band-gap emission bands characteristic of isoelectronic oxygen defects. The emission spectra vary spatially with position and orientation with respect to the major axis of CVD growth. These data suggest that a complex set of defects exist in the band gap of CVD ZnS whose structural nature is highly dependent upon local deposition and growth conditions, contributing to inherent heterogeneity in optical behavior throughout the material. (c) 2013 Optical Society of America
C1 [McCloy, John S.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[McCloy, John S.] Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA.
[Potter, Barrett G.] Univ Arizona, Dept Mat Sci & Engn, Tucson, AZ 85721 USA.
[Potter, Barrett G.] Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721 USA.
RP McCloy, JS (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd, Richland, WA 99352 USA.
EM john.mccloy@wsu.edu
RI McCloy, John/D-3630-2013
OI McCloy, John/0000-0001-7476-7771
FU Raytheon Company
FX This work was performed as part of the primary author's doctorate work
at the University of Arizona with support from Raytheon Company.
NR 27
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U1 1
U2 27
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 2159-3930
J9 OPT MATER EXPRESS
JI Opt. Mater. Express
PD SEP 1
PY 2013
VL 3
IS 9
BP 1273
EP 1278
DI 10.1364/OME.3.001273
PG 6
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA 211XH
UT WOS:000323944700008
ER
PT J
AU Pitarka, A
Thio, HK
Somerville, P
Bonilla, LF
AF Pitarka, Arben
Thio, Hong Kie
Somerville, Paul
Bonilla, Luis Fabian
TI Broadband Ground-Motion Simulation of an Intraslab Earthquake and
Nonlinear Site Response: 2010 Ferndale, California, Earthquake Case
Study
SO SEISMOLOGICAL RESEARCH LETTERS
LA English
DT Article
ID BEHAVIOR; BASIN; FAULT
C1 [Pitarka, Arben] Atmospher Earth & Energy Div, Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
[Thio, Hong Kie; Somerville, Paul] URS Corp, Los Angeles, CA 90017 USA.
[Bonilla, Luis Fabian] Univ Paris Est IFSTTAR, Dept GERS Geotech Environm Risques Nat & Sci Terr, Lab Seismes & Vibrat, F-77447 Marne La Vallee 2, France.
RP Pitarka, A (reprint author), Atmospher Earth & Energy Div, Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94551 USA.
EM pitarka1@llnl.gov
RI pitarka, arben/K-5491-2014; Bonilla, Luis Fabian/K-5092-2012
FU California Department of Conservation, California Geological Survey,
Strong Motion Instrumentation Program [1010-933]
FX This work was partially supported by the California Department of
Conservation, California Geological Survey, Strong Motion
Instrumentation Program, Contract 1010-933. We thank the anonymous
reviewer for his helpful suggestions, and Anthony Shakal for the
constructive discussions.
NR 26
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U1 1
U2 5
PU SEISMOLOGICAL SOC AMER
PI ALBANY
PA 400 EVELYN AVE, SUITE 201, ALBANY, CA 94706-1375 USA
SN 0895-0695
J9 SEISMOL RES LETT
JI Seismol. Res. Lett.
PD SEP-OCT
PY 2013
VL 84
IS 5
BP 785
EP 795
DI 10.1785/0220130031
PG 11
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 212NS
UT WOS:000323990700009
ER
PT J
AU Harmon, RS
Russo, RE
Hark, RR
AF Harmon, Russell S.
Russo, Richard E.
Hark, Richard R.
TI Applications of laser-induced breakdown spectroscopy for geochemical and
environmental analysis: A comprehensive review
SO SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
LA English
DT Review
DE Laser-induced breakdown spectroscopy; GEOLIBS; Geochemical analysis;
Environmental analysis; Chemometrics
ID INDUCED PLASMA SPECTROSCOPY; QUANTITATIVE ELEMENTAL ANALYSIS; INDIVIDUAL
FLUID INCLUSIONS; BULK AQUEOUS-SOLUTIONS; IN-SITU CHARACTERIZATION;
DOUBLE-PULSE LIBS; TOTAL SOIL CARBON; EMISSION-SPECTROSCOPY; REAL-TIME;
IRON-ORE
AB Applications of laser-induced breakdown spectroscopy (LIBS) have been growing rapidly and continue to be extended to a broad range of materials. This paper reviews recent application of LIBS for the analysis of geological and environmental materials, here termed "GEOLIBS". Following a summary of fundamentals of the LIBS analytical technique and its potential for chemical analysis in real time, the history of the application of LIBS to the analysis of natural fluids, minerals, rocks, soils, sediments, and other natural materials is described. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Russo, Richard E.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Hark, Richard R.] Juniata Coll, Dept Chem, Huntingdon, PA 16652 USA.
RP Hark, RR (reprint author), Juniata Coll, Dept Chem, Huntingdon, PA 16652 USA.
EM Russell.S.Harmon@usace.army.mil; rerusso@lbl.gov; hark@juniata.edu
FU Army Research Laboratory; Chemical Science Division, Office of Basic
Energy Sciences; Defense Nuclear Nonproliferation Research and
Development Office of the U.S. Department of Energy at the Lawrence
Berkeley National Laboratory [DE-AC02-05CH11231]; ARO Grant [60674-EV];
II-VI Foundation
FX The authors gratefully acknowledge Army Research Laboratory funding to
RSH, support by the Chemical Science Division, Office of Basic Energy
Sciences and the Defense Nuclear Nonproliferation Research and
Development Office of the U.S. Department of Energy under contract
number DE-AC02-05CH11231 at the Lawrence Berkeley National Laboratory to
RER, and financial support to RRH from ARO Grant 60674-EV and the II-VI
Foundation.
NR 216
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U1 8
U2 135
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0584-8547
J9 SPECTROCHIM ACTA B
JI Spectroc. Acta Pt. B-Atom. Spectr.
PD SEP 1
PY 2013
VL 87
BP 11
EP 26
DI 10.1016/j.sab.2013.05.017
PG 16
WC Spectroscopy
SC Spectroscopy
GA 210ZN
UT WOS:000323874000003
ER
PT J
AU Martin, MZ
Mayes, MA
Heal, KR
Brice, DJ
Wullschleger, SD
AF Martin, Madhavi Z.
Mayes, Melanie A.
Heal, Katherine R.
Brice, Deanne J.
Wullschleger, Stan D.
TI Investigation of laser-induced breakdown spectroscopy and multivariate
analysis for differentiating inorganic and organic C in a variety of
soils
SO SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
LA English
DT Article
DE Soil carbon; Inorganic carbon and organic carbon in soils; LIBS; PLS
models
ID CARBON; SPECTRA; SAMPLES; FOREST
AB Laser-induced breakdown spectroscopy (LIBS) along with multivariate analysis was used to differentiate between the total carbon (C), inorganic C, and organic C in a set of 58 different soils from 5 soil orders. A 532 nm laser with 45 mJ of laser power was used to excite the 58 samples of soil and the emission of all the elements present in the soil samples was recorded in a single spectrum with a wide wavelength range of 200-800 nm. The results were compared to the laboratory standard technique, e.g., combustion on a LECO-CN analyzer, to determine the true values for total C, inorganic C, and organic C concentrations. Our objectives were: 1) to determine the characteristic spectra of soils containing different amounts of organic and inorganic C, and 2) to examine the viability of this technique for differentiating between soils that contain predominantly organic and/or inorganic C content for a range of diverse soils. Previous work has shown that LIBS is an accurate and reliable approach to measuring total carbon content of soils, but it remains uncertain whether inorganic and organic forms of carbon can be separated using this approach. Total C and inorganic C exhibited correlation with rock-forming elements such as Al, Si, Fe, Ti, Ca, and Sr, while organic C exhibited minor correlation with these elements and a major correlation with Mg. We calculated a figure of merit (Mg/Ca) based on our results to enable differentiation between inorganic versus organic C. We obtained the LIBS validation prediction for total, inorganic, and organic C to have a coefficient of regression, r(2) = 0.91, 0.87, and 0.91 respectively. These examples demonstrate an advance in LIBS-based techniques to distinguish between organic and inorganic C using the full wavelength spectra. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Martin, Madhavi Z.] Oak Ridge Natl Lab, BioSci Div, Oak Ridge, TN 37831 USA.
[Mayes, Melanie A.; Brice, Deanne J.; Wullschleger, Stan D.] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Mayes, Melanie A.; Wullschleger, Stan D.] Oak Ridge Natl Lab, Climate Change Sci Inst, Oak Ridge, TN 37831 USA.
[Heal, Katherine R.] Univ Washington, Dept Oceanog, Seattle, WA 98122 USA.
RP Martin, MZ (reprint author), Oak Ridge Natl Lab, BioSci Div, Oak Ridge, TN 37831 USA.
EM martinm1@ornl.gov
RI Wullschleger, Stan/B-8297-2012;
OI Wullschleger, Stan/0000-0002-9869-0446; Martin,
Madhavi/0000-0002-6677-2180
FU U.S. Department of Energy Office of Science Biological and Environmental
Research (BER) Program; U.S. Department of Energy [DE-AC05-00OR22725]
FX This research was supported by the U.S. Department of Energy Office of
Science Biological and Environmental Research (BER) Program. This
manuscript has been authored by UT-Battelle LLC under Contract No.
DE-AC05-00OR22725 with the U.S. Department of Energy. The United States
Government retains and the publisher, by accepting the article for
publication, acknowledges that the United States Government retains a
non-exclusive, paid-up, irrevocable, world-wide license to publish or
reproduce the published form of this manuscript, or allow others to do
so, for United States Government purposes.
NR 31
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U1 1
U2 34
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0584-8547
J9 SPECTROCHIM ACTA B
JI Spectroc. Acta Pt. B-Atom. Spectr.
PD SEP 1
PY 2013
VL 87
BP 100
EP 107
DI 10.1016/j.sab.2013.05.026
PG 8
WC Spectroscopy
SC Spectroscopy
GA 210ZN
UT WOS:000323874000014
ER
PT J
AU Brand, V
Baker, MS
de Boer, MP
AF Brand, Vitali
Baker, Michael S.
de Boer, Maarten P.
TI Impact of Contact Materials and Operating Conditions on Stability of
Micromechanical Switches
SO TRIBOLOGY LETTERS
LA English
DT Article
DE Tribopolymer; Nanoswitch; Microswitch; Cold-switching; Gas environment;
Pt; RuO2
ID VAPOR-PHASE LUBRICATION; MEMS SWITCHES; ELECTRICAL CONTACTS; ORGANIC
VAPORS; METAL; CHEMISTRY; RESISTANCE; POLYMERS; DEVICES; CMOS
AB Nano and micromechanical switches are of great interest in applications that require high speed, low-power consumption and high electrical isolation. There is strong evidence that airborne hydrocarbon accumulation on the contact surfaces of the switch is a key cause for device failure. Relatively unexplored contact materials such as RuO2 are of interest because they are believed to be less prone to hydrocarbon deposit accumulation than more commonly used materials such as Pt and Au. Here, we measure the reliability of RuO2 and Pt-coated microswitches in hydrocarbon-rich environments with N-2 and N-2:O-2 background gases. The RuO2 material performs very poorly in contaminated N-2, but very well in contaminated N-2:O-2. Furthermore, RuO2 performs much better than Pt in the contaminated N-2:O-2. It is demonstrated that the deposit, initially being an insulator, can be electrically broken-down, thereby substantially lowering switch resistance. It is further shown that the passage of electrical current through the contacts augments deposit accumulation.
C1 [Brand, Vitali; de Boer, Maarten P.] Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA.
[Baker, Michael S.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP de Boer, MP (reprint author), Carnegie Mellon Univ, Dept Mech Engn, 5000 Forbes Ave, Pittsburgh, PA 15213 USA.
EM mpdebo@andrew.cmu.edu
RI de Boer, Maarten/C-1525-2013
OI de Boer, Maarten/0000-0003-1574-9324
FU U.S. Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]; General Electric Corporation
FX Sandia National Laboratories is a multi-program laboratory managed and
operated by Sandia Corporation, a wholly owned subsidiary of Lockheed
Martin Corporation, for the U.S. Department of Energy's National Nuclear
Security Administration under contract DE-AC04-94AL85000. We acknowledge
General Electric Corporation for providing funds to construct the test
chamber.
NR 58
TC 14
Z9 14
U1 0
U2 23
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1023-8883
J9 TRIBOL LETT
JI Tribol. Lett.
PD SEP
PY 2013
VL 51
IS 3
BP 341
EP 356
DI 10.1007/s11249-013-0166-2
PG 16
WC Engineering, Chemical; Engineering, Mechanical
SC Engineering
GA 203ZE
UT WOS:000323332800005
ER
PT J
AU Bryan, T
Gonzalez, JM
Bacik, JP
DeNunzio, NJ
Unkefer, CJ
Schrader, TE
Ostermann, A
Dunaway-Mariano, D
Allen, KN
Fisher, SZ
AF Bryan, Tyrel
Gonzalez, Javier M.
Bacik, John P.
DeNunzio, Nicholas J.
Unkefer, Clifford J.
Schrader, Tobias E.
Ostermann, Andreas
Dunaway-Mariano, Debra
Allen, Karen N.
Fisher, S. Zoe
TI Neutron diffraction studies towards deciphering the protonation state of
catalytic residues in the bacterial KDN9P phosphatase
SO ACTA CRYSTALLOGRAPHICA SECTION F-STRUCTURAL BIOLOGY AND CRYSTALLIZATION
COMMUNICATIONS
LA English
DT Article
ID CARBONIC-ANHYDRASE II; JOINT X-RAY; PROTEIN CRYSTALLOGRAPHY; HYDROGEN;
SUPERFAMILY; DIVERSITY; NETWORK; ENZYMES; ROLES; MODEL
AB The enzyme 2-keto-3-deoxy-9-O-phosphonononic acid phosphatase (KDN9P phosphatase) functions in the pathway for the production of 2-keto-3-deoxy-D-glycero-D-galacto-nononic acid, a sialic acid that is important for the survival of commensal bacteria in the human intestine. The enzyme is a member of the haloalkanoate dehalogenase superfamily and represents a good model for the active-site protonation state of family members. Crystals of approximate dimensions 1.5 x 1.0 x 1.0 mm were obtained in space group P2(1)2(1)2, with unit-cell parameters a = 83.1, b = 108.9, c = 75.7 angstrom. A complete neutron data set was collected from a medium-sized H/D-exchanged crystal at BIODIFF at the Heinz Maier-Leibnitz Zentrum (MLZ), Garching, Germany in 18 d. Initial refinement to 2.3 angstrom resolution using only neutron data showed significant density for catalytically important residues.
C1 [Bryan, Tyrel; Dunaway-Mariano, Debra] Univ New Mexico, Dept Chem & Chem Biol, Albuquerque, NM 87131 USA.
[Gonzalez, Javier M.; Bacik, John P.; Unkefer, Clifford J.; Fisher, S. Zoe] Los Alamos Natl Lab, BioSci Div B11, Los Alamos, NM 87545 USA.
[DeNunzio, Nicholas J.; Allen, Karen N.] Boston Univ, Dept Chem, Boston, MA 02115 USA.
[Schrader, Tobias E.] Forschungszentrum Julich, JCNS, Heinz Maier Leibnitz Zentrum MLZ, D-85748 Garching, Germany.
[Ostermann, Andreas] Tech Univ Munich, Heinz Maier Leibnitz Zentrum MLZ, D-85748 Garching, Germany.
RP Fisher, SZ (reprint author), Los Alamos Natl Lab, BioSci Div B11, POB 1663, Los Alamos, NM 87545 USA.
EM zfisher@lanl.gov
OI Allen, Karen/0000-0001-7296-0551; Ostermann,
Andreas/0000-0002-1477-5590; Gonzalez, Javier M./0000-0002-3298-2235;
Schrader, Tobias Erich/0000-0001-5159-0846
FU National Institute of Health [U54 GM093342]; Department of Energy Office
of Biological and Environmental Research (DOE-OBER)
FX We acknowledge funding from the National Institute of Health U54
GM093342 (to KNA and DD-M). The PCS is funded by the Department of
Energy Office of Biological and Environmental Research (DOE-OBER).
NR 34
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U1 0
U2 13
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1744-3091
J9 ACTA CRYSTALLOGR F
JI Acta Crystallogr. F-Struct. Biol. Cryst. Commun.
PD SEP
PY 2013
VL 69
BP 1015
EP 1019
DI 10.1107/S1744309113021386
PN 9
PG 5
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Biophysics; Crystallography
SC Biochemistry & Molecular Biology; Biophysics; Crystallography
GA 208YT
UT WOS:000323719700014
PM 23989152
ER
PT J
AU Kordilla, J
Tartakovsky, AM
Geyer, T
AF Kordilla, J.
Tartakovsky, A. M.
Geyer, T.
TI A smoothed particle hydrodynamics model for droplet and film flow on
smooth and rough fracture surfaces
SO ADVANCES IN WATER RESOURCES
LA English
DT Article
DE Unsaturated flow; Fractured rocks; Smoothed particle hydrodynamics;
Gravity-driven flow; Film flow; Surface tension
ID HYDRAULIC CONDUCTIVITY; POROUS-MEDIA; LIQUID-DROPS; UNSATURATED
FRACTURES; HORIZONTAL SURFACES; SCALING PROPERTIES; CONTACT-ANGLE;
DYNAMICS; TRANSPORT; TENSION
AB Flow on fracture surfaces has been identified by many authors as an important flow process in unsaturated fractured rock formations. Given the complexity of flow dynamics on such small scales, robust numerical methods have to be employed in order to capture the highly dynamic interfaces and flow intermittency. In this work we use a three-dimensional multiphase Smoothed Particle Hydrodynamics (SPH) model to simulate surface tension dominated flow on smooth fracture surfaces. We model droplet and film flow over a wide range of contact angles and Reynolds numbers encountered in such flows on rock surfaces. We validate our model via comparison with existing empirical and semi-analytical solutions for droplet flow. We use the SPH model to investigate the occurrence of adsorbed trailing films left behind droplets under various flow conditions and its importance for the flow dynamics when films and droplets coexist. It is shown that flow velocities are higher on prewetted surfaces covered by a thin film which is qualitatively attributed to the enhanced dynamic wetting and dewetting at the trailing and advancing contact lines. Finally, we demonstrate that the SPH model can be used to study flow on rough surfaces. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Kordilla, J.; Geyer, T.] Univ Gottingen, Geosci Ctr, D-37073 Gottingen, Germany.
[Tartakovsky, A. M.] Pacific NW Natl Lab, Computat Math Grp, Richland, WA 99352 USA.
RP Kordilla, J (reprint author), Univ Gottingen, Geosci Ctr, Goldschmidstr 3, D-37073 Gottingen, Germany.
EM jkordil@gwdg.de
FU DAAD (German Academic Exchange Service); Department of Energy's Office
of Advanced Scientific Computing Research Program
FX The authors thank four anonymous reviewers. This work was partially
supported by the DAAD (German Academic Exchange Service) providing J.
Kordilla with an international research scholarship at the Pacific
Northwest National Laboratory (PNNL), USA. A.M. Tartakovsky was
supported by the Department of Energy's Office of Advanced Scientific
Computing Research Program and at Pacific Northwest National Laboratory
(PNNL). PNNL is operated by Battelle for the US Department of Energy.
NR 64
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U1 6
U2 50
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0309-1708
EI 1872-9657
J9 ADV WATER RESOUR
JI Adv. Water Resour.
PD SEP
PY 2013
VL 59
BP 1
EP 14
DI 10.1016/j.advwatres.2013.04.009
PG 14
WC Water Resources
SC Water Resources
GA 207MZ
UT WOS:000323606500001
ER
PT J
AU Tartakovsky, GD
Tartakovsky, AM
Scheibe, TD
Fang, Y
Mahadevan, R
Lovley, DR
AF Tartakovsky, G. D.
Tartakovsky, A. M.
Scheibe, T. D.
Fang, Y.
Mahadevan, R.
Lovley, D. R.
TI Pore-scale simulation of microbial growth using a genome-scale metabolic
model: Implications for Darcy-scale reactive transport
SO ADVANCES IN WATER RESOURCES
LA English
DT Article
DE Pore-scale; Simulation; Biogeochemistry; Metal reduction; Geobacter;
Genome-scale model
ID SMOOTHED PARTICLE HYDRODYNAMICS; SITU URANIUM BIOREMEDIATION;
POROUS-MEDIA; IN-SITU; ESCHERICHIA-COLI; GEOBACTER-SULFURREDUCENS; FLOW;
REDUCTION; SILICO; SUBSURFACE
AB Recent advances in microbiology have enabled the quantitative simulation of microbial metabolism and growth based on genome-scale characterization of metabolic pathways and fluxes. We have incorporated a genome-scale metabolic model of the iron-reducing bacteria Geobacter sulfurreducens into a pore-scale simulation of microbial growth based on coupling of iron reduction to oxidation of a soluble electron donor (acetate). In our model, fluid flow and solute transport is governed by a combination of the Navier-Stokes and advection-diffusion-reaction equations. Microbial growth occurs only on the surface of soil grains where solid-phase mineral iron oxides are available. Mass fluxes of chemical species associated with microbial growth are described by the genome-scale microbial model, implemented using a constraint-based metabolic model, and provide the Robin-type boundary condition for the advection-diffusion equation at soil grain surfaces.
Conventional models of microbially-mediated subsurface reactions use a lumped reaction model that does not consider individual microbial reaction pathways, and describe reactions rates using empirically-derived rate formulations such as the Monod-type kinetics. We have used our pore-scale model to explore the relationship between genome-scale metabolic models and Monod-type formulations, and to assess the manifestation of pore-scale variability (microenvironments) in terms of apparent Darcy-scale microbial reaction rates. The genome-scale model predicted lower biomass yield, and different stoichiometry for iron consumption, in comparison to prior Monod formulations based on energetics considerations. We were able to fit an equivalent Monod model, by modifying the reaction stoichiometry and biomass yield coefficient, that could effectively match results of the genome-scale simulation of microbial behaviors under excess nutrient conditions, but predictions of the fitted Monod model deviated from those of the genome-scale model under conditions in which one or more nutrients were limiting.
The fitted Monod kinetic model was also applied at the Darcy scale; that is, to simulate average reaction processes at the scale of the entire pore-scale model domain. As we expected, even under excess nutrient conditions for which the Monod and genome-scale models predicted equal reaction rates at the pore scale, the Monod model over-predicted the rates of biomass growth and iron and acetate utilization when applied at the Darcy scale. This discrepancy is caused by an inherent assumption of perfect mixing over the Darcy-scale domain, which is clearly violated in the pore-scale models. These results help to explain the need to modify the flux constraint parameters in order to match observations in previous applications of the genome-scale model at larger scales. These results also motivate further investigation of quantitative multi-scale relationships between fundamental behavior at the pore scale (where genome-scale models are appropriately applied) and observed behavior at larger scales (where predictions of reactive transport phenomena are needed). (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Tartakovsky, G. D.; Scheibe, T. D.; Fang, Y.] Pacific NW Natl Lab, Hydrol Grp, Richland, WA 99352 USA.
[Tartakovsky, A. M.] Pacific NW Natl Lab, Computat Math Grp, Richland, WA 99352 USA.
[Mahadevan, R.] Univ Toronto, Dept Chem Engn & Appl Chem, Toronto, ON M5S 1A1, Canada.
[Lovley, D. R.] Univ Massachusetts, Dept Microbiol, Amherst, MA 01003 USA.
RP Tartakovsky, GD (reprint author), Pacific NW Natl Lab, Hydrol Grp, Richland, WA 99352 USA.
EM guzel.tartakovsky@pnl.gov
RI Scheibe, Timothy/A-8788-2008; Fang, Yilin/J-5137-2015; Mahadevan,
Radhakrishnan/A-8502-2008
OI Scheibe, Timothy/0000-0002-8864-5772; Mahadevan,
Radhakrishnan/0000-0002-1270-9063
FU Subsurface Biogeochemical Research Program of the U.S. Department of
Energy, Office of Science; Advanced Scientific Computing Research
Program of the U.S. Department of Energy, Office of Science
FX This work was supported by the Subsurface Biogeochemical Research
Program and the Advanced Scientific Computing Research Program of the
U.S. Department of Energy, Office of Science. Pacific Northwest National
Laboratory is operated by Battelle for the U.S. Department of Energy.
NR 68
TC 5
Z9 5
U1 7
U2 73
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0309-1708
J9 ADV WATER RESOUR
JI Adv. Water Resour.
PD SEP
PY 2013
VL 59
BP 256
EP 270
DI 10.1016/j.advwatres.2013.05.007
PG 15
WC Water Resources
SC Water Resources
GA 207MZ
UT WOS:000323606500020
ER
PT J
AU Meixner, M
Panuzzo, P
Roman-Duval, J
Engelbracht, C
Babler, B
Seale, J
Hony, S
Montiel, E
Sauvage, M
Gordon, K
Misselt, K
Okumura, K
Chanial, P
Beck, T
Bernard, JP
Bolatto, A
Bot, C
Boyer, ML
Carlson, LR
Clayton, GC
Chen, CHR
Cormier, D
Fukui, Y
Galametz, M
Galliano, F
Hora, JL
Hughes, A
Indebetouw, R
Israel, FP
Kawamura, A
Kemper, F
Kim, S
Kwon, E
Lebouteiller, V
Li, A
Long, KS
Madden, SC
Matsuura, M
Muller, E
Oliveira, JM
Onishi, T
Otsuka, M
Paradis, D
Poglitsch, A
Reach, WT
Robitaille, TP
Rubio, M
Sargent, B
Sewilo, M
Skibba, R
Smith, LJ
Srinivasan, S
Tielens, AGGM
van Loon, JT
Whitney, B
AF Meixner, M.
Panuzzo, P.
Roman-Duval, J.
Engelbracht, C.
Babler, B.
Seale, J.
Hony, S.
Montiel, E.
Sauvage, M.
Gordon, K.
Misselt, K.
Okumura, K.
Chanial, P.
Beck, T.
Bernard, J. -P.
Bolatto, A.
Bot, C.
Boyer, M. L.
Carlson, L. R.
Clayton, G. C.
Chen, C. -H. R.
Cormier, D.
Fukui, Y.
Galametz, M.
Galliano, F.
Hora, J. L.
Hughes, A.
Indebetouw, R.
Israel, F. P.
Kawamura, A.
Kemper, F.
Kim, S.
Kwon, E.
Lebouteiller, V.
Li, A.
Long, K. S.
Madden, S. C.
Matsuura, M.
Muller, E.
Oliveira, J. M.
Onishi, T.
Otsuka, M.
Paradis, D.
Poglitsch, A.
Reach, W. T.
Robitaille, T. P.
Rubio, M.
Sargent, B.
Sewilo, M.
Skibba, R.
Smith, L. J.
Srinivasan, S.
Tielens, A. G. G. M.
van Loon, J. Th.
Whitney, B.
TI THE HERSCHEL INVENTORY OF THE AGENTS OF GALAXY EVOLUTION IN THE
MAGELLANIC CLOUDS, A HERSCHEL OPEN TIME KEY PROGRAM
SO ASTRONOMICAL JOURNAL
LA English
DT Article
DE catalogs; dust, extinction; infrared: galaxies; Magellanic Clouds;
submillimeter: general; surveys
ID STAR-FORMATION HISTORY; YOUNG STELLAR OBJECTS; III PHOTOMETRIC MAPS; LOW
METALLICITY; SPITZER SURVEY; MOLECULAR CLOUDS; EVOLVED STARS; INFRARED
OBSERVATIONS; APERTURE SYNTHESIS; EXCESS EMISSION
AB We present an overview of the HERschel Inventory of The Agents of Galaxy Evolution (HERITAGE) in the Magellanic Clouds project, which is a Herschel Space Observatory open time key program. We mapped the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) at 100, 160, 250, 350, and 500 mu m with the Spectral and Photometric Imaging Receiver (SPIRE) and Photodetector Array Camera and Spectrometer (PACS) instruments on board Herschel using the SPIRE/PACS parallel mode. The overriding science goal of HERITAGE is to study the life cycle of matter as traced by dust in the LMC and SMC. The far-infrared and submillimeter emission is an effective tracer of the interstellar medium (ISM) dust, the most deeply embedded young stellar objects (YSOs), and the dust ejected by the most massive stars. We describe in detail the data processing, particularly for the PACS data, which required some custom steps because of the large angular extent of a single observational unit and overall the large amount of data to be processed as an ensemble. We report total global fluxes for the LMC and SMC and demonstrate their agreement with measurements by prior missions. The HERITAGE maps of the LMC and SMC are dominated by the ISM dust emission and bear most resemblance to the tracers of ISM gas rather than the stellar content of the galaxies. We describe the point source extraction processing and the criteria used to establish a catalog for each waveband for the HERITAGE program. The 250 mu m band is the most sensitive and the source catalogs for this band have similar to 25,000 objects for the LMC and similar to 5500 objects for the SMC. These data enable studies of ISM dust properties, submillimeter excess dust emission, dust-to-gas ratio, Class 0 YSO candidates, dusty massive evolved stars, supernova remnants (including SN1987A), H II regions, and dust evolution in the LMC and SMC. All images and catalogs are delivered to the Herschel Science Center as part of the community support aspects of the project. These HERITAGE images and catalogs provide an excellent basis for future research and follow up with other facilities.
C1 [Meixner, M.; Roman-Duval, J.; Seale, J.; Gordon, K.; Beck, T.; Boyer, M. L.; Long, K. S.; Sargent, B.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Meixner, M.; Sewilo, M.] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
[Panuzzo, P.; Hony, S.; Sauvage, M.; Okumura, K.; Chanial, P.; Cormier, D.; Galliano, F.; Lebouteiller, V.; Madden, S. C.] CEA, Irfu SAp, Lab AIM, F-91191 Gif Sur Yvette, France.
[Panuzzo, P.] Observ Paris, CNRS, Lab GEPI, F-92195 Meudon, France.
[Engelbracht, C.; Montiel, E.; Misselt, K.; Skibba, R.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
[Engelbracht, C.] Raytheon Co, Tucson, AZ 85756 USA.
[Babler, B.; Whitney, B.] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA.
[Montiel, E.; Clayton, G. C.] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
[Bernard, J. -P.; Paradis, D.] CNRS, IRAP, F-31028 Toulouse 4, France.
[Bernard, J. -P.; Paradis, D.] Univ Toulouse, UPS OMP, IRAP, F-31028 Toulouse 4, France.
[Bolatto, A.] Univ Maryland, Dept Astron, Lab Millimeter Wave Astron, College Pk, MD 20742 USA.
[Bot, C.] Univ Strasbourg, Observ Astron Strasbourg, F-67000 Strasbourg, France.
[Bot, C.] CNRS, Observ Astron Strasbourg, UMR7550, F-67000 Strasbourg, France.
[Boyer, M. L.] NASA, Goddard Space Flight Ctr, Observat Cosmol Lab, Greenbelt, MD 20771 USA.
[Boyer, M. L.] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA.
[Carlson, L. R.; Israel, F. P.; Tielens, A. G. G. M.] Leiden Univ, Sterrewacht Leiden, NL-2300 RA Leiden, Netherlands.
[Chen, C. -H. R.] Max Planck Inst Radioastron, D-53121 Bonn, Germany.
[Fukui, Y.] Nagoya Univ, Dept Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, Japan.
[Galametz, M.] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.
[Hora, J. L.] Harvard Univ, Ctr Astrophys, Cambridge, MA 02138 USA.
[Hughes, A.; Robitaille, T. P.] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
[Indebetouw, R.] Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA.
[Indebetouw, R.] Natl Radio Astron Observ, Charlottesville, VA 22903 USA.
[Kawamura, A.; Muller, E.] Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.
[Kemper, F.; Otsuka, M.; Srinivasan, S.] Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan.
[Kim, S.; Kwon, E.] Sejong Univ, Dept Astron & Space Sci, Seoul 143747, South Korea.
[Li, A.] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA.
[Matsuura, M.] UCL, Dept Phys & Astron, London WC1E 6BT, England.
[Oliveira, J. M.; van Loon, J. Th.] Keele Univ, Lennard Jones Labs, Sch Phys & Geog Sci, Keele ST5 5BG, Staffs, England.
[Onishi, T.] Osaka Prefecture Univ, Dept Phys Sci, Sakai, Osaka 5998531, Japan.
[Poglitsch, A.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Reach, W. T.] Univ Space Res Assoc, Stratospher Observ Infrared Astron, Moffett Field, CA 94035 USA.
[Rubio, M.] Univ Chile, Dept Astron, Santiago, Chile.
[Sargent, B.] Rochester Inst Technol, Ctr Imaging Sci, Rochester, NY 14623 USA.
[Sargent, B.] Rochester Inst Technol, Lab Multiwavelength Astrophys, Rochester, NY 14623 USA.
[Smith, L. J.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Smith, L. J.] European Space Agcy, Baltimore, MD 21218 USA.
[Srinivasan, S.] Inst Astrophys, UPMC CNRS, UMR7095, F-75014 Paris, France.
RP Meixner, M (reprint author), Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA.
EM meixner@stsci.edu
RI Kemper, Francisca/D-8688-2011; Rubio, Monica/J-3384-2016;
OI Kemper, Francisca/0000-0003-2743-8240; Bot,
Caroline/0000-0001-6118-2985; Babler, Brian/0000-0002-6984-5752;
Lebouteiller, Vianney/0000-0002-7716-6223; Reach,
William/0000-0001-8362-4094; Robitaille, Thomas/0000-0002-8642-1329;
Clayton, Geoffrey/0000-0002-0141-7436
FU NASA Herschel Science Center, JPL [1381522, 1381650, 1350371]; FONDECYT
[1080335]; FONDAP [15010003]; National Science Council
[NSC100-2112-M-001-023-MY3]; European Space Agency (ESA); Herschel
Science Center; NASA Herschel Science Center; PACS; SPIRE Instrument
Control Centers
FX We acknowledge financial support from the NASA Herschel Science Center,
JPL contract Nos. 1381522 and 1381650. M. R. is supported by FONDECYT
No1080335 and FONDAP No15010003. F. K. acknowledges support from the
National Science Council in the form of grant NSC100-2112-M-001-023-MY3.
R. A. S. acknowledges financial support from the NASA Herschel Science
Center, JPL contract No. 1350371. We are thankful for the contributions
and support from the European Space Agency (ESA), the PACS and SPIRE
teams, the Herschel Science Center (esp. L. Conversi) and the NASA
Herschel Science Center (esp. A. Barbar and R. Paladini), and the PACS
and SPIRE Instrument Control Centers (esp. George Bendo), without which
none of this work would be possible.
NR 111
TC 45
Z9 45
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-6256
EI 1538-3881
J9 ASTRON J
JI Astron. J.
PD SEP
PY 2013
VL 146
IS 3
AR 62
DI 10.1088/0004-6256/146/3/62
PG 35
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 203OO
UT WOS:000323302700019
ER
PT J
AU Sabbi, E
Anderson, J
Lennon, DJ
van der Marel, RP
Aloisi, A
Boyer, ML
Cignoni, M
de Marchi, G
de Mink, SE
Evans, CJ
Gallagher, JS
Gordon, K
Gouliermis, DA
Grebel, EK
Koekemoer, AM
Larsen, SS
Panagia, N
Ryon, JE
Smith, LJ
Tosi, M
Zaritsky, D
AF Sabbi, E.
Anderson, J.
Lennon, D. J.
van der Marel, R. P.
Aloisi, A.
Boyer, M. L.
Cignoni, M.
de Marchi, G.
de Mink, S. E.
Evans, C. J.
Gallagher, J. S., III
Gordon, K.
Gouliermis, D. A.
Grebel, E. K.
Koekemoer, A. M.
Larsen, S. S.
Panagia, N.
Ryon, J. E.
Smith, L. J.
Tosi, M.
Zaritsky, D.
TI HUBBLE TARANTULA TREASURY PROJECT: UNRAVELING TARANTULA'S WEB. I.
OBSERVATIONAL OVERVIEW AND FIRST RESULTS
SO ASTRONOMICAL JOURNAL
LA English
DT Article
DE galaxies: star clusters: individual (30 Doradus); Magellanic Clouds;
stars: formation; stars: imaging; stars: pre-main sequence
ID LARGE-MAGELLANIC-CLOUD; 30 DORADUS NEBULA; YOUNG STELLAR POPULATIONS;
STAR-FORMATION HISTORY; INITIAL MASS FUNCTION; LYMAN BREAK GALAXIES;
ALL-SKY SURVEY; DWARF GALAXIES; IRREGULAR GALAXIES; INTERMEDIATE-MASS
AB The Hubble Tarantula Treasury Project (HTTP) is an ongoing panchromatic imaging survey of stellar populations in the Tarantula Nebula in the Large Magellanic Cloud that reaches into the sub-solar mass regime (<0.5 M-circle dot). HTTP utilizes the capability of the Hubble Space Telescope to operate the Advanced Camera for Surveys and the Wide Field Camera 3 in parallel to study this remarkable region in the near-ultraviolet, optical, and near-infrared spectral regions, including narrow-band H alpha images. The combination of all these bands provides a unique multi-band view. The resulting maps of the stellar content of the Tarantula Nebula within its main body provide the basis for investigations of star formation in an environment resembling the extreme conditions found in starburst galaxies and in the early universe. Access to detailed properties of individual stars allows us to begin to reconstruct the temporal and spatial evolution of the stellar skeleton of the Tarantula Nebula over space and time on a sub-parsec scale. In this first paper we describe the observing strategy, the photometric techniques, and the upcoming data products from this survey and present preliminary results obtained from the analysis of the initial set of near-infrared observations.
C1 [Sabbi, E.; Anderson, J.; van der Marel, R. P.; Aloisi, A.; de Mink, S. E.; Gordon, K.; Koekemoer, A. M.; Panagia, N.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Lennon, D. J.] ESA, European Space Astron Ctr, E-28691 Madrid, Spain.
[Boyer, M. L.] NASA, Goddard Space Flight Ctr, Observat Cosmol Lab, Greenbelt, MD 20771 USA.
[Boyer, M. L.] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA.
[Cignoni, M.] Univ Bologna, Dipartimento Astron, I-40127 Bologna, Italy.
[Cignoni, M.; Tosi, M.] Osservatorio Astron Bologna, Ist Nazl Astrofis, I-40127 Bologna, Italy.
[de Marchi, G.] European Space Agcy, Dept Space Sci, NL-2200 AG Noordwijk, Netherlands.
[de Mink, S. E.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
[Evans, C. J.] Royal Observ, UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland.
[Gallagher, J. S., III; Ryon, J. E.] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA.
[Gouliermis, D. A.] Heidelberg Univ, Inst Theoret Astrophys, Zentrum Astron, D-69120 Heidelberg, Germany.
[Grebel, E. K.] Heidelberg Univ, Astron Rechen Inst, Zentrum Astron, D-69120 Heidelberg, Germany.
[Larsen, S. S.] Radboud Univ Nijmegen, Dept Astrophys, IMAPP, NL-6500 GL Nijmegen, Netherlands.
[Panagia, N.] Osserv Astrofis Catania, Ist Nazl Astrofis, I-95123 Catania, Italy.
[Smith, L. J.] ESA, STScI, Baltimore, MD 21218 USA.
[Zaritsky, D.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
RP Sabbi, E (reprint author), Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA.
EM sabbi@stsci.edu
RI Tosi, Monica/O-9377-2015; Cignoni, Michele/J-9365-2016;
OI Tosi, Monica/0000-0002-0986-4759; Cignoni, Michele/0000-0001-6291-6813;
de Mink, Selma/0000-0001-9336-2825; Lennon, Daniel/0000-0003-3063-4867;
Gouliermis, Dimitrios/0000-0002-2763-0075; /0000-0002-1891-3794;
Koekemoer, Anton/0000-0002-6610-2048
FU NASA through Space Telescope Science Institute [GO-12499, GO-12939];
NASA [NAS 5-26555]; Collaborative Research Center "The Milky Way System"
of the German Research Foundation (DFG) [SFB 881]; German Research
Foundation (DFG) [GO 1659/3-1]; NASA through Hubble Fellowship
[HST-HF-51270.01-A]; Space Telescope Science Institute; [ASI
I009/10/0]; [PRIN-INAF-2010]; [PRIN-MIUR-2010-11]
FX The authors are grateful to Zolt Levay for his work on the images shown
in Figures 1 and 3. M. T. and M. C. have been partially funded by
contracts ASI I009/10/0, PRIN-INAF-2010 and PRIN-MIUR-2010-11. Support
for programs GO-12499 and GO-12939 was provided by NASA through grants
from the Space Telescope Science Institute, which is operated by the
Association of Universities for Research in Astronomy, Inc., under NASA
contract NAS 5-26555. E. K. G. acknowledges support from the
Collaborative Research Center "The Milky Way System" (SFB 881) of the
German Research Foundation (DFG), particularly by subproject B5. D. A.
G. kindly acknowledges financial support by the German Research
Foundation (DFG) through grant GO 1659/3-1. S.d.M. acknowledges support
by NASA through Hubble Fellowship grant HST-HF-51270.01-A awarded by the
Space Telescope Science Institute, which is operated by the Association
of Universities for Research in Astronomy, Inc., for NASA, under
contract NAS 5-26555.
NR 88
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-6256
J9 ASTRON J
JI Astron. J.
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PY 2013
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DI 10.1088/0004-6256/146/3/53
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WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 203OO
UT WOS:000323302700010
ER
PT J
AU Bard, D
Kratochvil, JM
Chang, C
May, M
Kahn, SM
AlSayyad, Y
Ahmad, Z
Bankert, J
Connolly, A
Gibson, RR
Gilmore, K
Grace, E
Haiman, Z
Hannel, M
Huffenberger, KM
Jernigan, JG
Jones, L
Krughoff, S
Lorenz, S
Marshall, S
Meert, A
Nagarajan, S
Peng, E
Peterson, J
Rasmussen, AP
Shmakova, M
Sylvestre, N
Todd, N
Young, M
AF Bard, D.
Kratochvil, J. M.
Chang, C.
May, M.
Kahn, S. M.
AlSayyad, Y.
Ahmad, Z.
Bankert, J.
Connolly, A.
Gibson, R. R.
Gilmore, K.
Grace, E.
Haiman, Z.
Hannel, M.
Huffenberger, K. M.
Jernigan, J. G.
Jones, L.
Krughoff, S.
Lorenz, S.
Marshall, S.
Meert, A.
Nagarajan, S.
Peng, E.
Peterson, J.
Rasmussen, A. P.
Shmakova, M.
Sylvestre, N.
Todd, N.
Young, M.
TI EFFECT OF MEASUREMENT ERRORS ON PREDICTED COSMOLOGICAL CONSTRAINTS FROM
SHEAR PEAK STATISTICS WITH LARGE SYNOPTIC SURVEY TELESCOPE
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmological parameters; dark energy; gravitational lensing: weak;
methods: statistical
ID WEAK LENSING SURVEYS; PRIMORDIAL NON-GAUSSIANITY; DARK-MATTER HALOS;
GALAXY CLUSTERS; NUMBER COUNTS; MODEL; COSMOS; FIELDS
AB We study the effect of galaxy shape measurement errors on predicted cosmological constraints from the statistics of shear peak counts with the Large Synoptic Survey Telescope (LSST). We use the LSST Image Simulator in combination with cosmological N-body simulations to model realistic shear maps for different cosmological models. We include both galaxy shape noise and, for the first time, measurement errors on galaxy shapes. We find that the measurement errors considered have relatively little impact on the constraining power of shear peak counts for LSST.
C1 [Bard, D.; Chang, C.; Kahn, S. M.; Gilmore, K.; Marshall, S.; Rasmussen, A. P.; Shmakova, M.] Stanford Univ, KIPAC, Stanford, CA 94309 USA.
[Kratochvil, J. M.; Huffenberger, K. M.] Univ Miami, Dept Phys, Coral Gables, FL 33124 USA.
[May, M.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
[AlSayyad, Y.; Connolly, A.; Gibson, R. R.; Jones, L.; Krughoff, S.] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[Ahmad, Z.; Bankert, J.; Grace, E.; Hannel, M.; Lorenz, S.; Meert, A.; Nagarajan, S.; Peng, E.; Peterson, J.; Sylvestre, N.; Todd, N.; Young, M.] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
[Haiman, Z.; Jernigan, J. G.] Columbia Univ, Dept Astron & Astrophys, New York, NY 10027 USA.
[Jernigan, J. G.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
RP Bard, D (reprint author), Stanford Univ, KIPAC, 452 Lomita Mall, Stanford, CA 94309 USA.
EM djbard@slac.stanford.edu
OI Huffenberger, Kevin/0000-0001-7109-0099
FU NASA's Jet Propulsion Laboratory [1363745]; U.S. Department of Energy
[DE-AC02-98CH10886]; National Science Foundation [0809409]; Department
of Energy [DE-AC02-76-SFO0515]; SLAC National Accelerator Laboratory
FX We would like to thank Brandon Calabro for useful discussions on shear
maps and aperture mass statistics. J.M.K. and K. M. H. receive support
from NASA's Jet Propulsion Laboratory subcontract 1363745. This research
utilized resources at the New York Center for Computational Sciences, a
cooperative effort between Brookhaven National Laboratory and Stony
Brook University, supported in part by the State of New York. This work
is supported in part by the U.S. Department of Energy under Contract No.
DE-AC02-98CH10886.; LSST project activities are supported in part by the
National Science Foundation through Governing Cooperative Agreement
0809409 managed by the Association of Universities for Research in
Astronomy (AURA), and the Department of Energy under contract
DE-AC02-76-SFO0515 with the SLAC National Accelerator Laboratory.
Additional LSST funding comes from private donations, grants to
universities, and in-kind support from LSSTC Institutional Members.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
VL 774
IS 1
AR 49
DI 10.1088/0004-637X/774/1/49
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700049
ER
PT J
AU Boyer, ML
Girardi, L
Marigo, P
Williams, BF
Aringer, B
Nowotny, W
Rosenfield, P
Dorman, CE
Guhathakurta, P
Dalcanton, JJ
Melbourne, JL
Olsen, KAG
Weisz, DR
AF Boyer, M. L.
Girardi, L.
Marigo, P.
Williams, B. F.
Aringer, B.
Nowotny, W.
Rosenfield, P.
Dorman, C. E.
Guhathakurta, P.
Dalcanton, J. J.
Melbourne, J. L.
Olsen, K. A. G.
Weisz, D. R.
TI IS THERE A METALLICITY CEILING TO FORM CARBON STARS?-A NOVEL TECHNIQUE
REVEALS A SCARCITY OF C STARS IN THE INNER M31 DISK
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: individual (M31); stars: AGB and post-AGB; stars: carbon;
stars: late-type
ID ASYMPTOTIC GIANT BRANCH; SMALL-MAGELLANIC-CLOUD; NEAR-INFRARED
IDENTIFICATION; HIGH-REDSHIFT GALAXIES; AGB-STARS; LOCAL GROUP; STELLAR
POPULATIONS; TP-AGB; SYNTHETIC PHOTOMETRY; RED SUPERGIANTS
AB We use medium-band near-infrared (NIR) Hubble Space Telescope WFC3 photometry with model NIR spectra of asymptotic giant branch (AGB) stars to develop a new tool for efficiently distinguishing carbon-rich (C-type) AGB stars from oxygen-rich (M-type) AGB stars in galaxies at the edge of and outside the Local Group. We present the results of a test of this method on a region of the inner disk of M31, where we find a surprising lack of C stars, contrary to the findings of previous C star searches in other regions of M31. We find only one candidate C star (plus up to six additional, less certain C star candidates), resulting in an extremely low ratio of C to M stars (C/M = (3.3(-0.1)(+20)) x 10(-4)) that is one to two orders of magnitude lower than other C/M estimates in M31. The low C/M ratio is likely due to the high metallicity in this region which impedes stars from achieving C/O > 1 in their atmospheres. These observations provide stringent constraints to evolutionary models of metal-rich AGB stars and suggest that there is a metallicity threshold above which M stars are unable to make the transition to C stars, dramatically affecting AGB mass loss and dust production and, consequently, the observed global properties of metal-rich galaxies.
C1 [Boyer, M. L.] NASA, Goddard Space Flight Ctr, Observat Cosmol Lab, Greenbelt, MD 20771 USA.
[Boyer, M. L.] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA.
[Girardi, L.] Osservatorio Astron Padova INAF, I-35122 Padua, Italy.
[Marigo, P.] Univ Padua, Dept Phys & Astron G Galilei, I-35122 Padua, Italy.
[Williams, B. F.; Rosenfield, P.; Dalcanton, J. J.; Weisz, D. R.] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[Aringer, B.; Nowotny, W.] Univ Vienna, Dept Astrophys, A-1180 Vienna, Austria.
[Dorman, C. E.; Guhathakurta, P.] Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA.
[Melbourne, J. L.] CALTECH, Caltech Opt Observ, Div Phys Math & Astron, Pasadena, CA 91125 USA.
[Olsen, K. A. G.] Natl Opt Astron Observ, Tucson, AZ 85719 USA.
RP Boyer, ML (reprint author), NASA, Goddard Space Flight Ctr, Observat Cosmol Lab, Code 665, Greenbelt, MD 20771 USA.
EM martha.boyer@nasa.gov
FU NASA Postdoctoral Program at the Goddard Space Flight Center; NASA
[NAS5-26555]; NASA through HST from the STScI [GO-12862, GO-12055];
University of Padova [CPDA125588/12]; Austrian Science Fund (FWF)
[P21988-N16]
FX We thank the referee, Jacco van Loon, for thoughtful comments that
improved the manuscript and helped to clarify important issues. This
work was supported by the NASA Postdoctoral Program at the Goddard Space
Flight Center, administered by ORAU through a contract with NASA and by
NASA through HST grant numbers GO-12862 and GO-12055 from the STScI,
which is operated by AURA, Inc., under NASA contract NAS5-26555. P.M.
and L.G. acknowledge support from Progetto di Ateneo 2012, University of
Padova, ID: CPDA125588/12. This research was funded in part by the
Austrian Science Fund (FWF): P21988-N16.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
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VL 774
IS 1
AR 83
DI 10.1088/0004-637X/774/1/83
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700083
ER
PT J
AU Kasen, D
Badnell, NR
Barnes, J
AF Kasen, Daniel
Badnell, N. R.
Barnes, Jennifer
TI OPACITIES AND SPECTRA OF THE r-PROCESS EJECTA FROM NEUTRON STAR MERGERS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE gravitational waves; nuclear reactions, nucleosynthesis, abundances;
opacity; radiative transfer; stars: neutron; supernovae: general
ID GAMMA-RAY BURSTS; COMPACT OBJECT MERGERS; LIGHT CURVES; ELECTROMAGNETIC
COUNTERPARTS; PROCESS NUCLEOSYNTHESIS; ANALYTIC SOLUTIONS; IA
SUPERNOVAE; BINARIES; EXPLOSION; COALESCENCE
AB Material ejected during (or immediately following) the merger of two neutron stars may assemble into heavy elements through the r-process. The subsequent radioactive decay of the nuclei can power transient electromagnetic emission similar to, but significantly dimmer than, an ordinary supernova. Identifying such events is an important goal of future optical surveys, offering new perspectives on the origin of r-process nuclei and the astrophysical sources of gravitational waves. Predictions of the transient light curves and spectra, however, have suffered from the uncertain optical properties of heavy ions. Here we argue that the opacity of an expanding r-process material is dominated by bound-bound transitions from those ions with the most complex valence electron structure, namely the lanthanides. For a few representative ions, we run atomic structure models to calculate the radiative transition rates for tens of millions of lines. The resulting r-process opacities are orders of magnitude larger than that of ordinary (e.g., iron-rich) supernova ejecta. Radiative transport calculations using these new opacities suggest that the light curves should be longer, dimmer, and redder than previously thought. The spectra appear to be pseudo-blackbody, with broad absorption features, and peak in the infrared (similar to 1 mu m). We discuss uncertainties in the opacities and attempt to quantify their impact on the spectral predictions. The results have important implications for observational strategies to find and study the radioactively powered electromagnetic counterparts to neutron star mergers.
C1 [Kasen, Daniel; Barnes, Jennifer] Univ Calif Berkeley, Dept Phys & Astron, Berkeley, CA 94720 USA.
[Kasen, Daniel; Barnes, Jennifer] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
[Badnell, N. R.] Univ Strathclyde, Dept Phys, Glasgow G4 0NG, Lanark, Scotland.
RP Kasen, D (reprint author), Univ Calif Berkeley, Dept Phys & Astron, Berkeley, CA 94720 USA.
FU Department of Energy Office of Nuclear Physics; Office of Energy
Research, Office of High Energy and Nuclear Physics, Divisions of
Nuclear Physics, of the U.S. Department of Energy [DE-AC02-05CH11231];
STFC [ST/J000892/1]
FX This work was supported by the Department of Energy Office of Nuclear
Physics Early Career Award, and by the Director, Office of Energy
Research, Office of High Energy and Nuclear Physics, Divisions of
Nuclear Physics, of the U.S. Department of Energy under Contract No.
DE-AC02-05CH11231. The work of N.R.B. was supported by STFC
(ST/J000892/1).
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
VL 774
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DI 10.1088/0004-637X/774/1/25
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700025
ER
PT J
AU McDonald, M
Benson, BA
Vikhlinin, A
Stalder, B
Bleem, LE
de Haan, T
Lin, HW
Aird, KA
Ashby, MLN
Bautz, MW
Bayliss, M
Bocquet, S
Brodwin, M
Carlstrom, JE
Chang, CL
Cho, HM
Clocchiatti, A
Crawford, TM
Crites, AT
Desai, S
Dobbs, MA
Dudley, JP
Foley, RJ
Forman, WR
George, EM
Gettings, D
Gladders, MD
Gonzalez, AH
Halverson, NW
High, FW
Holder, GP
Holzapfel, WL
Hoover, S
Hrubes, JD
Jones, C
Joy, M
Keisler, R
Knox, L
Lee, AT
Leitch, EM
Liu, J
Lueker, M
Luong-Van, D
Mantz, A
Marrone, DP
McMahon, JJ
Mehl, J
Meyer, SS
Miller, ED
Mocanu, L
Mohr, JJ
Montroy, TE
Murray, SS
Nurgaliev, D
Padin, S
Plagge, T
Pryke, C
Reichardt, CL
Rest, A
Ruel, J
Ruhl, JE
Saliwanchik, BR
Saro, A
Sayre, JT
Schaffer, KK
Shirokoff, E
Song, J
Suhada, R
Spieler, HG
Stanford, SA
Staniszewski, Z
Stark, AA
Story, K
van Engelen, A
Vanderlinde, K
Vieira, JD
Williamson, R
Zahn, O
Zenteno, A
AF McDonald, M.
Benson, B. A.
Vikhlinin, A.
Stalder, B.
Bleem, L. E.
de Haan, T.
Lin, H. W.
Aird, K. A.
Ashby, M. L. N.
Bautz, M. W.
Bayliss, M.
Bocquet, S.
Brodwin, M.
Carlstrom, J. E.
Chang, C. L.
Cho, H. M.
Clocchiatti, A.
Crawford, T. M.
Crites, A. T.
Desai, S.
Dobbs, M. A.
Dudley, J. P.
Foley, R. J.
Forman, W. R.
George, E. M.
Gettings, D.
Gladders, M. D.
Gonzalez, A. H.
Halverson, N. W.
High, F. W.
Holder, G. P.
Holzapfel, W. L.
Hoover, S.
Hrubes, J. D.
Jones, C.
Joy, M.
Keisler, R.
Knox, L.
Lee, A. T.
Leitch, E. M.
Liu, J.
Lueker, M.
Luong-Van, D.
Mantz, A.
Marrone, D. P.
McMahon, J. J.
Mehl, J.
Meyer, S. S.
Miller, E. D.
Mocanu, L.
Mohr, J. J.
Montroy, T. E.
Murray, S. S.
Nurgaliev, D.
Padin, S.
Plagge, T.
Pryke, C.
Reichardt, C. L.
Rest, A.
Ruel, J.
Ruhl, J. E.
Saliwanchik, B. R.
Saro, A.
Sayre, J. T.
Schaffer, K. K.
Shirokoff, E.
Song, J.
Suhada, R.
Spieler, H. G.
Stanford, S. A.
Staniszewski, Z.
Stark, A. A.
Story, K.
van Engelen, A.
Vanderlinde, K.
Vieira, J. D.
Williamson, R.
Zahn, O.
Zenteno, A.
TI THE GROWTH OF COOL CORES AND EVOLUTION OF COOLING PROPERTIES IN A SAMPLE
OF 83 GALAXY CLUSTERS AT 0.3 < z < 1.2 SELECTED FROM THE SPT-SZ SURVEY
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE early universe; galaxies: clusters: general; galaxies: clusters:
intracluster medium; X-rays: galaxies: clusters
ID SOUTH-POLE TELESCOPE; ACTIVE GALACTIC NUCLEI; RAY LUMINOUS CLUSTERS;
COLD MOLECULAR GAS; 720 SQUARE DEGREES; STAR-FORMATION; FLOW CLUSTERS;
HIGH-REDSHIFT; INTRACLUSTER MEDIUM; PERSEUS CLUSTER
AB We present first results on the cooling properties derived from Chandra X-ray observations of 83 high-redshift (0.3 < z < 1.2) massive galaxy clusters selected by their Sunyaev-Zel'dovich signature in the South Pole Telescope data. We measure each cluster's central cooling time, central entropy, and mass deposition rate, and compare these properties to those for local cluster samples. We find no significant evolution from z similar to 0 to z similar to 1 in the distribution of these properties, suggesting that cooling in cluster cores is stable over long periods of time. We also find that the average cool core entropy profile in the inner similar to 100 kpc has not changed dramatically since z similar to 1, implying that feedback must be providing nearly constant energy injection to maintain the observed "entropy floor" at similar to 10 keV cm(2). While the cooling properties appear roughly constant over long periods of time, we observe strong evolution in the gas density profile, with the normalized central density (rho(g),(0)/rho(crit)) increasing by an order of magnitude from z similar to 1 to z similar to 0. When using metrics defined by the inner surface brightness profile of clusters, we find an apparent lack of classical, cuspy, cool-core clusters at z > 0.75, consistent with earlier reports for clusters at z > 0.5 using similar definitions. Our measurements indicate that cool cores have been steadily growing over the 8 Gyr spanned by our sample, consistent with a constant, similar to 150M(circle dot) yr(-1) cooling flow that is unable to cool below entropies of 10 keV cm(2) and, instead, accumulates in the cluster center. We estimate that cool cores began to
C1 [McDonald, M.; Bautz, M. W.; Miller, E. D.] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.
[Benson, B. A.; Bleem, L. E.; Carlstrom, J. E.; Chang, C. L.; Crawford, T. M.; Crites, A. T.; Gladders, M. D.; High, F. W.; Hoover, S.; Keisler, R.; Leitch, E. M.; Mantz, A.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Padin, S.; Plagge, T.; Schaffer, K. K.; Story, K.; Vieira, J. D.; Williamson, R.] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
[Benson, B. A.; Carlstrom, J. E.; Chang, C. L.; Hoover, S.; Meyer, S. S.; Schaffer, K. K.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
[Vikhlinin, A.; Stalder, B.; Ashby, M. L. N.; Bayliss, M.; Foley, R. J.; Forman, W. R.; Jones, C.; Murray, S. S.; Stark, A. A.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Bleem, L. E.; Carlstrom, J. E.; Keisler, R.; Meyer, S. S.; Story, K.; Vieira, J. D.] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
[de Haan, T.; Dobbs, M. A.; Dudley, J. P.; Holder, G. P.; van Engelen, A.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
[Lin, H. W.] Caddo Parish Magnet High Sch, Shrevport, LA 71101 USA.
[Aird, K. A.; Hrubes, J. D.; Luong-Van, D.] Univ Chicago, Chicago, IL 60637 USA.
[Bayliss, M.; Nurgaliev, D.; Ruel, J.] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
[Bocquet, S.; Desai, S.; Liu, J.; Mohr, J. J.; Saro, A.; Suhada, R.; Zenteno, A.] Univ Munich, Dept Phys, D-81679 Munich, Germany.
[Bocquet, S.; Desai, S.; Liu, J.; Mohr, J. J.; Zenteno, A.] Excellence Cluster Univ, D-85748 Garching, Germany.
[Brodwin, M.] Univ Missouri, Dept Phys & Astron, Kansas City, MO 64110 USA.
[Carlstrom, J. E.; Crawford, T. M.; Crites, A. T.; Gladders, M. D.; High, F. W.; Leitch, E. M.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Padin, S.; Plagge, T.; Williamson, R.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
[Carlstrom, J. E.; Chang, C. L.; Mehl, J.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Cho, H. M.] NIST Quantum Devices Grp, Boulder, CO 80305 USA.
[Clocchiatti, A.] Pontificia Univ Catolica, Dept Astron & Astrosif, Santiago, Chile.
[George, E. M.; Holzapfel, W. L.; Lee, A. T.; Lueker, M.; Reichardt, C. L.; Shirokoff, E.; Zahn, O.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
[Gettings, D.; Gonzalez, A. H.] Univ Florida, Dept Astron, Gainesville, FL 32611 USA.
[Halverson, N. W.] Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA.
[Halverson, N. W.] Univ Colorado, Dept Phys, Boulder, CO 80309 USA.
[Joy, M.] NASA, George C Marshall Space Flight Ctr, Dept Space Sci, Huntsville, AL 35812 USA.
[Knox, L.; Stanford, S. A.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
[Lee, A. T.; Spieler, H. G.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA.
[Lueker, M.; Padin, S.; Shirokoff, E.; Vieira, J. D.] CALTECH, Pasadena, CA 91125 USA.
[Marrone, D. P.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
[McMahon, J. J.; Song, J.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
[Mohr, J. J.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Montroy, T. E.; Ruhl, J. E.; Saliwanchik, B. R.; Sayre, J. T.; Staniszewski, Z.] Case Western Reserve Univ, Dept Phys, Ctr Educ & Res Cosmol & Astrophys, Cleveland, OH 44106 USA.
[Pryke, C.] Univ Minnesota, Dept Phys, Minneapolis, MN 55455 USA.
[Rest, A.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
[Schaffer, K. K.] Sch Art Inst Chicago, Liberal Arts Dept, Chicago, IL 60603 USA.
[Stanford, S. A.] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA.
[Vanderlinde, K.] Univ Toronto, Dunlap Inst Astron & Astrophys, Toronto, ON M5S 3H4, Canada.
[Vanderlinde, K.] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada.
[Zahn, O.] Univ Calif Berkeley, Dept Phys, Berkeley Ctr Cosmol Phys, Berkeley, CA 94720 USA.
[Zahn, O.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP McDonald, M (reprint author), MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
EM mcdonald@space.mit.edu
RI Williamson, Ross/H-1734-2015; Holzapfel, William/I-4836-2015;
OI Williamson, Ross/0000-0002-6945-2975; Aird, Kenneth/0000-0003-1441-9518;
Reichardt, Christian/0000-0003-2226-9169; Lin, Henry/0000-0003-2767-6142
FU NASA [HST-HF51308.01-A, 12800071, 12800088, 13800883]; Space Telescope
Science Institute; Association of Universities for Research in
Astronomy, Inc., for NASA [NAS 5-26555]; National Science Foundation
[ANT-0638937]; NSF Physics Frontier Center [PHY-0114422]; Kavli
Foundation; Gordon and Betty Moore Foundation; NSF [AST-1009012,
AST-1009649, MRI-0723073]; U.S. Department of Energy [DE-AC02-06CH11357]
FX M.M. acknowledges support by NASA through a Hubble Fellowship grant
HST-HF51308.01-A awarded by the Space Telescope Science Institute, which
is operated by the Association of Universities for Research in
Astronomy, Inc., for NASA, under contract NAS 5-26555. The South Pole
Telescope program is supported by the National Science Foundation
through grant ANT-0638937. Partial support is also provided by the NSF
Physics Frontier Center grant PHY-0114422 to the Kavli Institute of
Cosmological Physics at the University of Chicago, the Kavli Foundation,
and the Gordon and Betty Moore Foundation. Support for X-ray analysis
was provided by NASA through Chandra Award Nos. 12800071, 12800088, and
13800883 issued by the Chandra X-Ray Observatory Center, which is
operated by the Smithsonian Astrophysical Observatory for and on behalf
of NASA. Galaxy cluster research at Harvard is supported by NSF grant
AST-1009012 and at SAO in part by NSF grants AST-1009649 and
MRI-0723073. Argonne National Laboratory's work was supported under U.S.
Department of Energy contract DE-AC02-06CH11357.
NR 95
TC 43
Z9 43
U1 1
U2 12
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
VL 774
IS 1
AR UNSP 23
DI 10.1088/0004-637X/774/1/23
PG 23
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700023
ER
PT J
AU Orlove, ST
Smith, CW
Vasquez, BJ
Schwadron, NA
Skoug, RM
Zurbuchen, TH
Zhao, L
AF Orlove, Steven T.
Smith, Charles W.
Vasquez, Bernard J.
Schwadron, Nathan A.
Skoug, Ruth M.
Zurbuchen, Thomas H.
Zhao, Liang
TI INTERVALS OF RADIAL INTERPLANETARY MAGNETIC FIELDS AT 1 AU, THEIR
ASSOCIATION WITH RAREFACTION REGIONS, AND THEIR APPARENT MAGNETIC FOOT
POINTS AT THE SUN
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE magnetohydrodynamics (MHD); solar wind; turbulence
ID ADVANCED COMPOSITION EXPLORER; SOLAR-WIND; HELIOSPHERE
AB We have examined 226 intervals of nearly radial interplanetary magnetic field orientations at 1 AU lasting in excess of 6 hr. They are found within rarefaction regions as are the previously reported high-latitude observations. We show that these rarefactions typically do not involve high-speed wind such as that seen by Ulysses at high latitudes during solar minimum. We have examined both the wind speeds and the thermal ion composition before, during and after the rarefaction in an effort to establish the source of the flow that leads to the formation of the rarefaction. We find that the bulk of the measurements, both fast- and slow-wind intervals, possess both wind speeds and thermal ion compositions that suggest they come from typical low-latitude sources that are nominally considered slow-wind sources. In other words, we find relatively little evidence of polar coronal hole sources even when we examine the faster wind ahead of the rarefaction regions. While this is in contrast to high-latitude observations, we argue that this is to be expected of low-latitude observations where polar coronal hole sources are less prevalent. As with the previous high-latitude observations, we contend that the best explanation for these periods of radial magnetic field is interchange reconnection between two sources of different wind speed.
C1 [Orlove, Steven T.; Smith, Charles W.; Vasquez, Bernard J.; Schwadron, Nathan A.] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA.
[Orlove, Steven T.; Smith, Charles W.; Vasquez, Bernard J.; Schwadron, Nathan A.] Univ New Hampshire, Ctr Space Sci, Inst Study Earth Oceans & Space, Durham, NH 03824 USA.
[Skoug, Ruth M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Zurbuchen, Thomas H.; Zhao, Liang] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA.
RP Orlove, ST (reprint author), Univ New Hampshire, Dept Phys, Durham, NH 03824 USA.
EM stx33@wildcats.unh.edu; Charles.Smith@unh.edu; Bernie.Vasquez@unh.edu;
N.Schwadron@unh.edu; rskoug@lanl.gov; thomasz@umich.edu; lzh@umich.edu
OI Zhao, Liang/0000-0002-5975-7476
FU Caltech [44A-1062037]; NASA Guest Investigator grant [NNX09AG28G];
NASA/SRT grant [NNX10AC18G]; NSF/SHINE grant [ATM0850705]; NSF FESD
Sun-to-Ice Project; U.S. Department of Energy; NASA ACE program; ACE
program subcontract from Caltech
FX S.T.O. and C.W.S. are supported by Caltech subcontract 44A-1062037 to
the University of New Hampshire in support of the ACE/MAG instrument.
B.J.V. is supported by NASA Guest Investigator grant NNX09AG28G,
NASA/SR&T grant NNX10AC18G, and NSF/SHINE grant ATM0850705. Support for
N.A.S. is provided by the NSF FESD Sun-to-Ice Project. Support at LANL
was provided under the auspices of the U.S. Department of Energy, with
financial support from the NASA ACE program. T.H.Z. and L.Z. are
supported by an ACE program subcontract from Caltech. S.T.O. is an
undergraduate physics major at the University of New Hampshire.
NR 25
TC 4
Z9 4
U1 0
U2 10
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
VL 774
IS 1
AR 15
DI 10.1088/0004-637X/774/1/15
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700015
ER
PT J
AU Whalen, DJ
Johnson, JL
Smidt, J
Meiksin, A
Heger, A
Even, W
Fryer, CL
AF Whalen, Daniel J.
Johnson, Jarrett L.
Smidt, Joseph
Meiksin, Avery
Heger, Alexander
Even, Wesley
Fryer, Chris L.
TI THE SUPERNOVA THAT DESTROYED A PROTOGALAXY: PROMPT CHEMICAL ENRICHMENT
AND SUPERMASSIVE BLACK HOLE GROWTH
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE accretion, accretion disks; black hole physics; early universe;
galaxies: high-redshift; hydrodynamics; quasars: general; radiative
transfer; stars: early-type; supernovae: general
ID PAIR-INSTABILITY SUPERNOVAE; METAL-POOR STARS; DIGITAL SKY SURVEY;
HYDRODYNAMIC MODEL-CALCULATIONS; REDSHIFT DWARF GALAXIES; PRIMORDIAL
HII-REGIONS; DARK-MATTER HALOES; EARLY UNIVERSE; 1ST STARS; DIRECT
COLLAPSE
AB The first primitive galaxies formed from accretion and mergers by z similar to 15, and were primarily responsible for cosmological reionization and the chemical enrichment of the early cosmos. But a few of these galaxies may have formed in the presence of strong Lyman-Werner UV fluxes that sterilized them of H-2, preventing them from forming stars or expelling heavy elements into the intergalactic medium prior to assembly. At masses of 10(8) M-circle dot and virial temperatures of 10(4) K, these halos began to rapidly cool by atomic lines, perhaps forming 10(4)-10(6) M-circle dot Pop III stars and, later, the seeds of supermassive black holes. We have modeled the explosion of a supermassive Pop III star in the dense core of a line-cooled protogalaxy with the ZEUS-MP code. We find that the supernova (SN) expands to a radius of similar to 1 kpc, briefly engulfing the entire galaxy, but then collapses back into the potential well of the dark matter. Fallback fully mixes the interior of the protogalaxy with metals, igniting a violent starburst and fueling the rapid growth of a massive black hole at its center. The starburst would populate the protogalaxy with stars in greater numbers and at higher metallicities than in more slowly evolving, nearby halos. The SN remnant becomes a strong synchrotron source that can be observed with eVLA and eMERLIN and has a unique signature that easily distinguishes it from less energetic SN remnants. Such explosions, and their attendant starbursts, may well have marked the birthplaces of supermassive black holes on the sky.
C1 [Whalen, Daniel J.; Johnson, Jarrett L.; Smidt, Joseph] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Whalen, Daniel J.] Heidelberg Univ, Inst Theoret Astrophys, Zentrum Astron, D-69120 Heidelberg, Germany.
[Meiksin, Avery] Univ Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland.
[Heger, Alexander] Monash Univ, Monash Ctr Astrophys, Clayton, Vic 3800, Australia.
[Even, Wesley; Fryer, Chris L.] Los Alamos Natl Lab, CCC 2, Los Alamos, NM 87545 USA.
RP Whalen, DJ (reprint author), Los Alamos Natl Lab, T-2, Los Alamos, NM 87545 USA.
OI Meiksin, Avery/0000-0002-5451-9057; Even, Wesley/0000-0002-5412-3618
FU Baden-Wurttemberg-Stiftung via the program Internationale
Spitzenforschung II [P-LS-SPII/18]; LANL Director's Fellowships; U.S.
DOE Program for Scientific Discovery through Advanced Computing (SciDAC)
[DE-FC02-09ER41618]; U.S. Department of Energy [DE-FG02-7ER40328]; Joint
Institute for Nuclear Astrophysics (JINA); Joint Institute for Nuclear
Astrophysics (NSF) [PHY08-22648, PHY110-2511]; ARC Future Fellowship
[FT120100363]; Monash University Larkins Fellowship; National Nuclear
Security Administration of the U.S. Department of Energy at Los Alamos
National Laboratory [DE-AC52-06NA25396]
FX D.J.W. acknowledges support from the Baden-Wurttemberg-Stiftung by
contract research via the program Internationale Spitzenforschung II
(grant P-LS-SPII/18). J.L.J. and J.S. were supported by LANL Director's
Fellowships. A. H. was supported by the U.S. DOE Program for Scientific
Discovery through Advanced Computing (SciDAC; DE-FC02-09ER41618), by the
U.S. Department of Energy under grant DE-FG02-7ER40328, and by the Joint
Institute for Nuclear Astrophysics (JINA; NSF grant PHY08-22648 and
PHY110-2511). A. H. acknowledges support by an ARC Future Fellowship
(FT120100363) and a Monash University Larkins Fellowship. Work at LANL
was done under the auspices of the National Nuclear Security
Administration of the U.S. Department of Energy at Los Alamos National
Laboratory under Contract No. DE-AC52-06NA25396. All ZEUS-MP simulations
were performed on Institutional Computing platforms (Pinto) at LANL.
NR 134
TC 24
Z9 24
U1 0
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD SEP 1
PY 2013
VL 774
IS 1
AR 64
DI 10.1088/0004-637X/774/1/64
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 205FA
UT WOS:000323426700064
ER
PT J
AU Eichorst, SA
Varanasi, P
Stavila, V
Zemla, M
Auer, M
Singh, S
Simmons, BA
Singer, SW
AF Eichorst, Stephanie A.
Varanasi, Patanjali
Stavila, Vatalie
Zemla, Marcin
Auer, Manfred
Singh, Seema
Simmons, Blake A.
Singer, Steven W.
TI Community dynamics of cellulose-adapted thermophilic bacterial consortia
SO ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID GLYCOSIDE HYDROLASE ACTIVITIES; SP-NOV.; GEN. NOV.; SEQUENCE DATA;
FRESH-WATER; SOIL; SWITCHGRASS; MEMBER; DEGRADATION; CELLULASES
AB Enzymatic hydrolysis of cellulose is a key process in the global carbon cycle and the industrial conversion of biomass to biofuels. In natural environments, cellulose hydrolysis is predominately performed by microbial communities. However, detailed understanding of bacterial cellulose hydrolysis is primarily confined to a few model isolates. Developing models for cellulose hydrolysis by mixed microbial consortia will complement these isolate studies and may reveal new mechanisms for cellulose deconstruction. Microbial communities were adapted to microcrystalline cellulose under aerobic, thermophilic conditions using green waste compost as the inoculum to study cellulose hydrolysis in a microbial consortium. This adaptation selected for three dominant taxa - the Firmicutes, Bacteroidetes and Thermus. A high-resolution profile of community development during the enrichment demonstrated a community transition from Firmicutes to a novel Bacteroidetes population that clusters in the Chitinophagaceae family. A representative strain of this population, strain NYFB, was successfully isolated, and sequencing of a nearly full-length 16S rRNA gene demonstrated that it was only 86% identical compared with other validated strains in the phylum Bacteroidetes. Strain NYFB grew well on soluble polysaccharide substrates, but grew poorly on insoluble polysaccharide substrates. Similar communities were observed in companion thermophilic enrichments on insoluble wheat arabinoxylan, a hemicellulosic substrate, suggesting a common model for deconstruction of plant polysaccharides. Combining observations of community dynamics and the physiology of strain NYFB, a cooperative successional model for polysaccharide hydrolysis by the Firmicutes and Bacteroidetes in the thermophilic cellulolytic consortia is proposed.
C1 [Eichorst, Stephanie A.; Varanasi, Patanjali; Stavila, Vatalie; Zemla, Marcin; Auer, Manfred; Singh, Seema; Simmons, Blake A.; Singer, Steven W.] Joint BioEnergy Inst, Emeryville, CA 94608 USA.
[Eichorst, Stephanie A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
[Eichorst, Stephanie A.] Univ Vienna, Div Microbial Ecol, A-1090 Vienna, Austria.
[Varanasi, Patanjali; Stavila, Vatalie; Singh, Seema; Simmons, Blake A.] Sandia Natl Labs, Biol & Mat Sci Ctr, Livermore, CA 94551 USA.
[Zemla, Marcin; Auer, Manfred] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA.
[Singer, Steven W.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Singer, SW (reprint author), Joint BioEnergy Inst, Emeryville, CA 94608 USA.
EM swsinger@lbl.gov
RI Eichorst, Stephanie A/A-1079-2017;
OI Eichorst, Stephanie A/0000-0002-9017-7461; Simmons,
Blake/0000-0002-1332-1810
FU U.S. Department of Energy, Office of Science, Office of Biological and
Environmental Research [DE-AC02-05CH11231]; Office of Science of the
U.S. Department of Energy [DE-AC02-05CH11231]
FX This work was performed as part of the DOE Joint BioEnergy Institute
(http://www.jbei.org) supported by the U.S. Department of Energy, Office
of Science, Office of Biological and Environmental Research, through
contract DE-AC02-05CH11231 between Lawrence Berkeley National Laboratory
and the U.S. Department of Energy. Pyrotag sequencing was conducted by
the Joint Genome Institute which is supported by the Office of Science
of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
NR 45
TC 17
Z9 17
U1 6
U2 70
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1462-2912
J9 ENVIRON MICROBIOL
JI Environ. Microbiol.
PD SEP
PY 2013
VL 15
IS 9
SI SI
BP 2573
EP 2587
DI 10.1111/1462-2920.12159
PG 15
WC Microbiology
SC Microbiology
GA 211HK
UT WOS:000323897000013
PM 23763762
ER
PT J
AU Rodi, WL
Myers, SC
AF Rodi, William L.
Myers, Stephen C.
TI Computation of traveltime covariances based on stochastic models of
velocity heterogeneity
SO GEOPHYSICAL JOURNAL INTERNATIONAL
LA English
DT Article
DE Seismic monitoring and test-ban treaty verification; Body waves;
Computational seismology; Statistical seismology
ID SEISMIC LOCATION; MANTLE; SHEAR; FLUCTUATIONS; UNCERTAINTY; TOMOGRAPHY;
INVERSION; LASA
AB We formulate the error covariance for calculated seismic traveltimes (traveltime covariance) along any two propagation paths as a double integral of a covariance function describing velocity-model error (velocity covariance) with sensitivity distributions for the paths. Two numerical techniques are presented for evaluating the traveltime covariance matrix for multiple paths. The first technique evaluates the covariance matrix directly. The second evaluates the inverse of the covariance matrix summed with a covariance matrix for observational errors, as is utilized in event locators. Our approach takes the velocity covariance to be the Green's function of a differential operator, which can be specified in terms of physically meaningful parameters, such as spatially variable velocity variance and correlation lengths. Our numerical algorithms reduce to solving finite-difference equations based on the differential operator. As a demonstration, we compute traveltime covariance using ray-based sensitivity distributions and a suite of depth-dependent models of velocity covariance. We compare our theoretical calculations to empirical estimates of traveltime variance versus event-station distance, derived from observed residuals relative to the 'ak135' velocity model. Our calculations predict and explain some key features of the distance dependence of observed residual statistics, such as abrupt changes in variance at crossover points separating branches of the first-arrival traveltime curve. We find that the observed traveltime variances in the distance range 2 degrees-33 degrees are well matched by assuming a velocity standard deviation (relative to 'ak135') of > 10 per cent in the crust and decaying from similar to 2 per cent in the uppermost mantle to near 0 per cent below the 410-km discontinuity. These variance estimates hold over a wide range of assumed correlation lengths of velocity error, which are not well constrained by traveltime variance observations. By providing a physical understanding of traveltime covariance, our approach may help in the development of improved methods for locating seismic events, for estimating path-specific corrections to baseline traveltime models, and for constraining the statistics of velocity variations in the Earth.
C1 [Rodi, William L.] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA.
[Myers, Stephen C.] Lawrence Livermore Natl Lab, Atmospher Earth & Energy Div, Livermore, CA 94550 USA.
RP Rodi, WL (reprint author), MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA.
EM rodi@mit.edu
RI Myers, Stephen/K-1368-2014
OI Myers, Stephen/0000-0002-0315-5599
FU US Department of Energy, National Nuclear Security Administration
[DE-FC52-05NA26603, DE-AC52-07NA27344]
FX This research was sponsored by the US Department of Energy, National
Nuclear Security Administration, under contracts DE-FC52-05NA26603 (to
Massachusetts Institute of Technology) and DE-AC52-07NA27344 (to LLNL).
The authors are grateful to Vernon Cormier of the University of
Connecticut for his thoughtful review of the paper and helpful
suggestions for its improvement, and to Jonathan Kane of Shell Oil
Company for the insights into geostatistical modelling and inversion he
has shared during many years of collaboration.
NR 28
TC 2
Z9 2
U1 1
U2 6
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0956-540X
J9 GEOPHYS J INT
JI Geophys. J. Int.
PD SEP
PY 2013
VL 194
IS 3
BP 1582
EP 1595
DI 10.1093/gji/ggt171
PG 14
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 205KJ
UT WOS:000323442800022
ER
PT J
AU Corbus, D
Kuss, M
Piwko, D
Hinkle, G
Matsuura, M
McNeff, M
Roose, L
Brooks, A
AF Corbus, Dave
Kuss, Mike
Piwko, Dick
Hinkle, Gene
Matsuura, Marc
McNeff, Mat
Roose, Leon
Brooks, Alec
TI All Options on the Table
SO IEEE POWER & ENERGY MAGAZINE
LA English
DT Article
C1 [Corbus, Dave; Kuss, Mike] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Piwko, Dick; Hinkle, Gene] GE Co, Schenectady, NY 12301 USA.
[Matsuura, Marc] Hawaiian Elect Co, Honolulu, HI USA.
[McNeff, Mat] MECO Elect Co, Maui, HI USA.
[Roose, Leon] Univ Hawaii Manoa, Hawaii Nat Energy Inst, Honolulu, HI USA.
[Brooks, Alec] Aerovironment, Monrovia, CA USA.
RP Corbus, D (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
NR 4
TC 2
Z9 3
U1 1
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1540-7977
J9 IEEE POWER ENERGY M
JI IEEE Power Energy Mag.
PD SEP-OCT
PY 2013
VL 11
IS 5
BP 65
EP 74
DI 10.1109/MPE.2013.2268814
PG 10
WC Engineering, Electrical & Electronic
SC Engineering
GA 207AC
UT WOS:000323567600009
ER
PT J
AU Sundaram, S
Colombo, P
Katoh, Y
AF Sundaram, Shanmugavelayutham
Colombo, Paolo
Katoh, Yutai
TI Selected Emerging Opportunities for Ceramics in Energy, Environment, and
Transportation
SO INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
LA English
DT Article
ID DIESEL; RANGE; THZ; TECHNOLOGY; CORDIERITE; EMISSIONS; SCIENCE; FILTER;
DPF
AB Novel ceramic materials and advanced techniques for processing them and controlling their microstructure are breaking new ground in the areas of energy, environment, and transportation. For example, terahertz (THz) properties of ceramic materials and advanced structures reveal their potential for sensing in energy and environmental applications as well as local communication networks in transportation. Emerging opportunities for the development of improved porous ceramics for engine emissions control are discussed in particular, in consideration of the key role that this technology has with respect to global environmental and transportation concerns. Moreover, it is anticipated that advanced ceramics and composites of certain classes will enable innovation in nuclear energy by providing breakthrough accident-tolerant features. In this article, we highlight these three areas of ceramics that are critical to the future and also show promise for growth.
C1 [Sundaram, Shanmugavelayutham] Alfred Univ, Kazuo Inamori Sch Engn, Alfred, NY 14802 USA.
[Sundaram, Shanmugavelayutham] Alfred Univ, New York State Coll Ceram, Alfred, NY 14802 USA.
[Colombo, Paolo] Univ Padua, Dipartimento Ingn Ind, I-35131 Padua, Italy.
[Colombo, Paolo] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
[Katoh, Yutai] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Sundaram, S (reprint author), Alfred Univ, Kazuo Inamori Sch Engn, Alfred, NY 14802 USA.
EM sundaram@alfred.edu
FU United States Government [DE-AC05-00OR22725]; United States Department
of Energy; Kyocera Corporation, Japan
FX This submission was partly (YK) sponsored by a contractor of the United
States Government under contract DE-AC05-00OR22725 with the United
States Department of Energy. YK acknowledges useful discussions with
Kurt A. Terrani and Lance L. Snead. SKS acknowledges support from the
Kyocera Corporation, Japan, in the form of the Inamori Professorship.
The authors acknowledge editorial help by Deborah Melinda, ORNL.
NR 54
TC 4
Z9 4
U1 1
U2 28
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1546-542X
J9 INT J APPL CERAM TEC
JI Int. J. Appl. Ceram. Technol.
PD SEP
PY 2013
VL 10
IS 5
BP 731
EP 739
DI 10.1111/ijac.12155
PG 9
WC Materials Science, Ceramics
SC Materials Science
GA 211FZ
UT WOS:000323892600002
ER
PT J
AU Asthana, R
Singh, M
Lin, HT
Matsunaga, T
Ishikawa, T
AF Asthana, Rajiv
Singh, Mrityunjay
Lin, Hua-Tay
Matsunaga, Tadashi
Ishikawa, Toshihiro
TI Joining of SiC Fiber-Bonded Ceramics using Silver, Copper, Nickel,
Palladium, and Silicon-Based Alloy Interlayers
SO INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
LA English
DT Article
ID CU-CLAD-MOLYBDENUM; METALLIC-GLASS INTERLAYERS; CARBON-CARBON
COMPOSITES; BRAZED JOINTS; MECHANICAL-PROPERTIES; HIGH-STRENGTH; TI;
MICROSTRUCTURE; TITANIUM
AB SiC fiber-bonded ceramics, SA-Tyrannohex((R)), (SA-THX) with perpendicular and parallel fiber orientations were brazed using Ag-, Ni- and Pd-base brazes, and four Si-X (X: Ti, Cr, Y, Ta) eutectics. Outcomes were variable, ranging from bonded joints through partially bonded to un-bonded joints. Prominent Ti- and Si-rich interfaces developed with Cusil-ABA, Ticusil, and Copper-ABA and Ni- and Si-rich layers with MBF-20. Stress rupture tests at 650 and 750 degrees C on Cusil-ABA-bonded joints revealed a temperature-dependent behavior for the perpendicular joints but not for the parallel joints with failure occurring at brazed interface. Higher-use temperatures can be targeted with eutectic Si-Ti and Si-Cr alloys.
C1 [Asthana, Rajiv] Univ Wisconsin Stout, Dept Engn & Technol, Menomonie, WI 54751 USA.
[Singh, Mrityunjay] Ohio Aerosp Inst, Cleveland, OH 44142 USA.
[Lin, Hua-Tay] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Matsunaga, Tadashi; Ishikawa, Toshihiro] Ube Ind Ltd, Inorgan Specialty Prod Res Lab, Ube, Yamaguchi 7558633, Japan.
RP Asthana, R (reprint author), Univ Wisconsin Stout, Dept Engn & Technol, Menomonie, WI 54751 USA.
EM asthanar@uwstout.edu
NR 19
TC 4
Z9 4
U1 3
U2 35
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1546-542X
J9 INT J APPL CERAM TEC
JI Int. J. Appl. Ceram. Technol.
PD SEP
PY 2013
VL 10
IS 5
BP 801
EP 813
DI 10.1111/ijac.12161
PG 13
WC Materials Science, Ceramics
SC Materials Science
GA 211FZ
UT WOS:000323892600010
ER
PT J
AU Fang, YL
Nguyen, BN
Carroll, KC
Xu, ZJ
Yabusaki, SB
Scheibe, TD
Bonneville, A
AF Fang, Yilin
Ba Nghiep Nguyen
Carroll, Kenneth C.
Xu, Zhijie
Yabusaki, Steven B.
Scheibe, Timothy D.
Bonneville, Alain
TI Development of a coupled thermo-hydro-mechanical model in discontinuous
media for carbon sequestration
SO INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
LA English
DT Article
DE Carbon sequestration; Geomechanics; Multiphase flow; Rigid Body-Spring
Model; Global Arrays toolkit; High-performance simulation
ID DEEP SALINE AQUIFERS; CO2 SEQUESTRATION; FLUID-FLOW; FRACTURED ROCKS;
GLOBAL ARRAYS; STORAGE; BEHAVIOR; SALAH; FIELD; PERMEABILITY
AB Geomechanical alteration of porous media is generally ignored for most shallow subsurface applications, whereas carbon dioxide (CO2) injection, migration, and trapping in deep saline aquifers will be controlled by coupled multifluid flow, energy transfer, and geomechanical processes. The accurate assessment of the risks associated with potential leakage of injected CO2 and the design of effective injection systems require that we represent these coupled processes within numerical simulators. The objectives of this study were to develop a coupled thermo-hydro-mechanical model into a single software and to examine the coupling of thermal, hydrological, and geomechanical processes for simulation of CO2 injection into the subsurface for carbon sequestration. A numerical model was developed to couple nonisothermal multiphase hydrological and geomechanical processes for prediction of multiple interconnected processes for carbon sequestration in deep saline aquifers. The geomechanics model was based on the Rigid Body-Spring Model (RBSM), a discrete method for modeling discontinuous rock systems. Poisson's effect that was often ignored by RBSM was considered in the model. The simulation of large-scale and long-term coupled processes in carbon capture and storage projects requires large memory and computational performance. The Global Array Toolkit was used to build the model to permit high-performance simulations of coupled processes. The model was used to simulate a case study with several scenarios to demonstrate the impacts of considering coupled processes and Poisson's effect for the prediction of CO2 sequestration. As a demonstration of the coupled model, a conceptual 3D model was used to explain the double-lobe uplift pattern observed in the Krechba gas field at In Salah (Algeria), a site that demonstrated the success of a CO2 sequestration effort into a deep saline formation. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Fang, Yilin; Ba Nghiep Nguyen; Carroll, Kenneth C.; Xu, Zhijie; Yabusaki, Steven B.; Scheibe, Timothy D.; Bonneville, Alain] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Fang, YL (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM Yilin.Fang@pnnl.gov
RI Scheibe, Timothy/A-8788-2008; Carroll, Kenneth/H-5160-2011; Fang,
Yilin/J-5137-2015; Xu, Zhijie/A-1627-2009;
OI Scheibe, Timothy/0000-0002-8864-5772; Carroll,
Kenneth/0000-0003-2097-9589; Xu, Zhijie/0000-0003-0459-4531; Bonneville,
Alain/0000-0003-1527-1578
FU United States-China Clean Energy Partnership; Pacific Northwest National
Laboratory (PNNL) Laboratory Directed Research and Development Program
under PNNL's Carbon Sequestration Initiative; National Energy Technology
Laboratory; U.S. Dept. of Energy Office of Fossil Energy as part of the
National Risk Assessment Partnership; U.S. Department of Energy Office
of Fossil Energy; U.S. Department of Energy Office of Science
[DE-AC05-76RL01830]
FX This research was supported by the United States-China Clean Energy
Partnership and the Pacific Northwest National Laboratory (PNNL)
Laboratory Directed Research and Development Program under PNNL's Carbon
Sequestration Initiative. Partial funding for this work was provided by
the National Energy Technology Laboratory and the U.S. Dept. of Energy
Office of Fossil Energy as part of the National Risk Assessment
Partnership and the Zero Emissions Research & Technology Program managed
by Montana State University and funded by the U.S. Department of Energy
Office of Fossil Energy. A portion of the research was performed using
PNNL Institutional Computing at Pacific Northwest National Laboratory.
PNNL is operated by Battelle for the U.S. Department of Energy Office of
Science under Contract DE-AC05-76RL01830.
NR 54
TC 10
Z9 10
U1 0
U2 24
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1365-1609
EI 1873-4545
J9 INT J ROCK MECH MIN
JI Int. J. Rock Mech. Min. Sci.
PD SEP
PY 2013
VL 62
BP 138
EP 147
DI 10.1016/j.ijrmms.2013.05.002
PG 10
WC Engineering, Geological; Mining & Mineral Processing
SC Engineering; Mining & Mineral Processing
GA 206PF
UT WOS:000323533900017
ER
PT J
AU Gall, DL
Ralph, J
Donohue, TJ
Noguera, DR
AF Gall, Daniel L.
Ralph, John
Donohue, Timothy J.
Noguera, Daniel R.
TI Benzoyl Coenzyme A Pathway-Mediated Metabolism of meta-Hydroxy-Aromatic
Acids in Rhodopseudomonas palustris
SO JOURNAL OF BACTERIOLOGY
LA English
DT Article
ID BACTERIUM THAUERA-AROMATICA; ANAEROBIC METABOLISM; PHENOLIC-COMPOUNDS;
COA PATHWAY; LYSINE ACETYLATION; GENOME SEQUENCE; ELECTRON-DONOR; KEY
ENZYME; DEGRADATION; LIGASE
AB Photoheterotrophic metabolism of two meta-hydroxy-aromatic acids, meta-, para-dihydroxybenzoate (protocatechuate) and meta-hydroxybenzoate, was investigated in Rhodopseudomonas palustris. When protocatechuate was the sole organic carbon source, photoheterotrophic growth in R. palustris was slow relative to cells using compounds known to be metabolized by the benzoyl coenzyme A (benzoyl-CoA) pathway. R. palustris was unable to grow when meta-hydroxybenzoate was provided as a sole source of organic carbon under photoheterotrophic growth conditions. However, in cultures supplemented with known benzoyl-CoA pathway inducers (para-hydroxybenzoate, benzoate, or cyclohexanoate), protocatechuate and meta-hydroxybenzoate were taken up from the culture medium. Further, protocatechuate and meta-hydroxybenzoate were each removed from cultures containing both meta-hydroxy-aromatic acids at equimolar concentrations in the absence of other organic compounds. Analysis of changes in culture optical density and in the concentration of soluble organic compounds indicated that the loss of these meta-hydroxy-aromatic acids was accompanied by biomass production. Additional experiments with defined mutants demonstrated that enzymes known to participate in the dehydroxylation of para-hydroxybenzoyl-CoA (HbaBCD) and reductive dearomatization of benzoyl-CoA (BadDEFG) were required for metabolism of protocatechuate and meta-hydroxybenzoate. These findings indicate that, under photoheterotrophic growth conditions, R. palustris can degrade meta-hydroxy-aromatic acids via the benzoyl-CoA pathway, apparently due to the promiscuity of the enzymes involved.
C1 [Gall, Daniel L.; Noguera, Daniel R.] Univ Wisconsin, Dept Civil & Environm Engn, Madison, WI 53706 USA.
[Donohue, Timothy J.] Univ Wisconsin, Dept Bacteriol, Madison, WI 53706 USA.
[Ralph, John] Univ Wisconsin, Dept Biochem, Madison, WI 53705 USA.
[Gall, Daniel L.; Ralph, John; Donohue, Timothy J.; Noguera, Daniel R.] Univ Wisconsin, Wisconsin Energy Inst, Great Lakes Bioenergy Res Ctr, Dept Energy, Madison, WI USA.
[Noguera, Daniel R.] Univ Wisconsin, Environm Chem & Technol Program, Madison, WI USA.
RP Gall, DL (reprint author), Univ Wisconsin, Dept Civil & Environm Engn, Madison, WI 53706 USA.
EM noguera@engr.wisc.edu
OI Donohue, Timothy/0000-0001-8738-2467
FU Department of Energy Office of Science's Great Lakes Bioenergy Research
Center [DE-FG02-07ER64495]; National Institute of General Medical
Sciences (NIGMS) [T32 GM08349]
FX This study was supported by a Department of Energy Office of Science's
Great Lakes Bioenergy Research Center grant (DE-FG02-07ER64495). D. L.
G. was supported by a traineeship from the National Institute of General
Medical Sciences (NIGMS) under biotechnology training grant T32 GM08349.
NR 43
TC 5
Z9 5
U1 1
U2 21
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0021-9193
J9 J BACTERIOL
JI J. Bacteriol.
PD SEP
PY 2013
VL 195
IS 18
BP 4112
EP 4120
DI 10.1128/JB.00634-13
PG 9
WC Microbiology
SC Microbiology
GA 208BD
UT WOS:000323649300011
PM 23852864
ER
PT J
AU Jardine, KJ
Meyers, K
Abrell, L
Alves, EG
Serrano, AM
Kesselmeier, J
Karl, T
Guenther, A
Chambers, JQ
Vickers, C
AF Jardine, Kolby J.
Meyers, Kimberly
Abrell, Leif
Alves, Eliane G.
Yanez Serrano, Ana Maria
Kesselmeier, Jurgen
Karl, Thomas
Guenther, Alex
Chambers, Jeffrey Q.
Vickers, Claudia
TI Emissions of putative isoprene oxidation products from mango branches
under abiotic stress
SO JOURNAL OF EXPERIMENTAL BOTANY
LA English
DT Article
DE 2-Methyl-3-buten-2-ol; 3-methyl furan; methacrolein; methyl vinyl
ketone; reactive oxygen species; volatile organic compounds
ID VOLATILE ORGANIC-COMPOUNDS; REACTION MASS-SPECTROMETRY;
LIPID-PEROXIDATION; ATMOSPHERIC CHEMISTRY; COMPOUND EMISSIONS; ONLINE
ANALYSIS; TRACE GASES; LEAVES; PLANTS; OXYGEN
AB Although several per cent of net carbon assimilation can be re-released as isoprene emissions to the atmosphere by many tropical plants, much uncertainty remains regarding its biological significance. In a previous study, we detected emissions of isoprene and its oxidation products methyl vinyl ketone (MVK) and methacrolein (MACR) from tropical plants under high temperature/light stress, suggesting that isoprene is oxidized not only in the atmosphere but also within plants. However, a comprehensive analysis of the suite of isoprene oxidation products in plants has not been performed and production relationships with environmental stress have not been described. In this study, putative isoprene oxidation products from mango (Mangifera indica) branches under abiotic stress were first identified. High temperature/light and freezethaw treatments verified direct emissions of the isoprene oxidation products MVK and MACR together with the first observations of 3-methyl furan (3-MF) and 2-methyl-3-buten-2-ol (MBO) as putative novel isoprene oxidation products. Mechanical wounding also stimulated emissions of MVK and MACR. Photosynthesis under (CO2)-C-13 resulted in rapid (< 30min) labelling of up to five carbon atoms of isoprene, with a similar labelling pattern observed in the putative oxidation products. These observations highlight the need to investigate further the mechanisms of isoprene oxidation within plants under stress and its biological and atmospheric significance.
C1 [Jardine, Kolby J.; Chambers, Jeffrey Q.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Climate Sci Dept, Berkeley, CA 94720 USA.
[Meyers, Kimberly] ARS, USDA, Tucson, AZ 85719 USA.
[Abrell, Leif] Univ Arizona, Dept Chem & Biochem, Tucson, AZ 85721 USA.
[Abrell, Leif] Univ Arizona, Dept Soil Water & Environm Sci, Tucson, AZ 85721 USA.
[Alves, Eliane G.; Yanez Serrano, Ana Maria] Inst Nacl de Pesquisas da Amazonia, Large Scale Biosphere Atmosphere Expt LBA, BR-69060001 Manaus, Amazonas, Brazil.
[Yanez Serrano, Ana Maria; Kesselmeier, Jurgen] Max Planck Inst Chem, Biogeochem Dept, D-55020 Mainz, Germany.
[Karl, Thomas] Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307 USA.
[Vickers, Claudia] Univ Queensland, Australian Inst Bioengn & Nanotechnol, St Lucia, Qld 4072, Australia.
RP Jardine, KJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Climate Sci Dept, 1 Cyclotron Rd,Bldg 64,Room 241, Berkeley, CA 94720 USA.
EM kjjardine@lbl.gov
RI Jardine, Kolby/N-2802-2013; Karl, Thomas/D-1891-2009; Vickers,
Claudia/A-1288-2009; Chambers, Jeffrey/J-9021-2014; Kesselmeier,
Jurgen/E-2389-2016;
OI Abrell, Leif/0000-0003-2490-1180; Jardine, Kolby/0000-0001-8491-9310;
Karl, Thomas/0000-0003-2869-9426; Vickers, Claudia/0000-0002-0792-050X;
Chambers, Jeffrey/0000-0003-3983-7847; Kesselmeier,
Jurgen/0000-0002-4446-534X; YANEZ SERRANO, ANA MARIA/0000-0001-6408-5961
FU Office of Biological and Environmental Research of the US Department of
Energy [DE-AC02-05CH11231]; Philecology Foundation of Fort Worth, Texas
FX This research was supported by the Office of Biological and
Environmental Research of the US Department of Energy under Contract no.
DE-AC02-05CH11231 as part of their Terrestrial Ecosystem Science
Program. Additional funding for this project came from the Philecology
Foundation of Fort Worth, Texas, and instrumentation support (CHE
0216226) from the US National Science Foundation.
NR 59
TC 18
Z9 18
U1 1
U2 32
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0022-0957
EI 1460-2431
J9 J EXP BOT
JI J. Exp. Bot.
PD SEP
PY 2013
VL 64
IS 12
BP 3697
EP 3709
DI 10.1093/jxb/ert202
PG 13
WC Plant Sciences
SC Plant Sciences
GA 207DY
UT WOS:000323578700012
PM 23881400
ER
PT J
AU Nguyen, BN
Henager, CH
AF Ba Nghiep Nguyen
Henager, Charles H., Jr.
TI Fiber/matrix interfacial thermal conductance effect on the thermal
conductivity of SiC/SiC composites
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID SUBCRITICAL CRACK-GROWTH; SILICON-CARBIDE; ELEVATED-TEMPERATURES; FUSION
APPLICATIONS; NEUTRON-IRRADIATION; 2D-SICF/SIC COMPOSITES; CVISICF/SIC
COMPOSITES; MECHANICAL-PROPERTIES; COMPUTER-SIMULATION; DEFECT
ACCUMULATION
AB SiC/SiC composites used in fusion reactor applications are subjected to high heat fluxes and require knowledge and tailoring of their in-service thermal conductivity. Accurately predicting the thermal conductivity of SiC/SiC composites as a function of temperature will guide the design of these materials for their intended use, which will eventually include the effects of 14-MeV neutron irradiations. This paper applies an Eshelby-Mori-Tanaka approach (EMTA) to compute the thermal conductivity of unirradiated SiC/SiC composites. The homogenization procedure includes three steps. In the first step EMTA computes the homogenized thermal conductivity of the unidirectional (UD) SiC fiber embraced by its coating layer. The second step computes the thermal conductivity of the UD composite formed by the equivalent SiC fibers embedded in a SiC matrix, and finally the thermal conductivity of the as-formed SiC/SiC composite is obtained by averaging the solution for the UD composite over all possible fiber orientations using the second-order fiber orientation tensor. The EMTA predictions for the transverse thermal conductivity of several types of SiC/SiC composites with different fiber types and interfaces are compared to the predicted and experimental results by Youngblood et al. [J. Nucl. Mater. 307-311 (2002) 1120-1125, Fusion Sci. Technol. 45 (2004) 583-591, Compos. Sci. Technol. 62 (2002) 1127-1139.] (C) 2013 Elsevier B.V. All rights reserved.
C1 [Ba Nghiep Nguyen; Henager, Charles H., Jr.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Nguyen, BN (reprint author), Pacific NW Natl Lab, POB 999,MSIN J4-55, Richland, WA 99352 USA.
EM Ba.Nguyen@pnnl.gov
OI Henager, Chuck/0000-0002-8600-6803
FU United States Department of Energy (US DOE) [DE-AC05-76RL01830]; US DOE
Office of Fusion Energy Sciences; US DOE Office of Nuclear Energy; US
DOE Office of Vehicle Technologies
FX The work described in this article was performed by Pacific Northwest
National Laboratory, which is operated by Battelle Memorial Institute
for the United States Department of Energy (US DOE) under Contract
DE-AC05-76RL01830 and was funded by the US DOE Office of Fusion Energy
Sciences and the US DOE Office of Nuclear Energy under the Nuclear
Energy Enabling Technologies Reactor Materials Program (NEET-RM). The
development of EMTA was funded by the US DOE Office of Vehicle
Technologies.
NR 51
TC 4
Z9 4
U1 1
U2 32
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
EI 1873-4820
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 11
EP 20
DI 10.1016/j.jnucmat.2013.04.031
PG 10
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600003
ER
PT J
AU Mei, ZG
Stan, M
Pichler, B
AF Mei, Zhi-Gang
Stan, Marius
Pichler, Benjamin
TI First-principles study of structural, elastic, electronic, vibrational
and thermodynamic properties of UN
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID BRILLOUIN-ZONE INTEGRATIONS; AUGMENTED-WAVE METHOD; URANIUM NITRIDE;
HEAT-CAPACITY; THERMAL-EXPANSION; LATTICE-DYNAMICS; NUCLEAR-FUELS;
MONONITRIDE; TEMPERATURE; UO2
AB The structural, elastic, electronic, phonon and thermodynamic properties of UN are studied by density functional theory (DFT) within local-density approximation (LDA) and generalized gradient approximation (GGA), and GGA + U. The GGA calculations of the ground state structural and elastic properties of UN show an overall better agreement with experimental data compared to LDA or GGA + U. The melting temperature of UN (T-m) is estimated from the calculated elastic constant, with GGA predicting T-m = 2944 +/- 300 K, in excellent agreement with experimental data. The calculated phonon dispersions of UN agree well with the low temperature measurements. Furthermore, the thermodynamic properties of UN are studied using quasiharmonic approximation by including both lattice vibrational and thermal electronic contributions. The predicted thermodynamic properties, such as enthalpy, entropy, Gibbs energy, heat capacity and thermal expansion coefficient, agree well with experimental data. The derived thermodynamic functions of UN are useful to the thermodynamic modeling of phase stabilities in UN-based materials. This study shows that the thermal electronic energy and entropy due to U 5f electrons are important to describe the free energy of UN, due to the metallic character of UN. The calculated thermodynamic properties also suggest that the anharmonic effects are less important in UN even at high-temperature. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Mei, Zhi-Gang; Stan, Marius] Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA.
[Pichler, Benjamin] Cornell Univ, Coll Arts & Sci, Ithaca, NY 14850 USA.
RP Mei, ZG (reprint author), Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM zmei@anl.gov
RI Mei, Zhi-Gang/D-3333-2012
OI Mei, Zhi-Gang/0000-0002-4249-7532
FU US Department of Energy, Office of Science [DE-AC02-06CH11357]
FX This work was supported by the US Department of Energy, Office of
Science under Contract No. DE-AC02-06CH11357. First-principles
calculations were carried out on LCRC's high performance computing
cluster Fusion and CNM's high performance computing cluster Carbon. ZGM
thanks Boris Dorado for providing specific modules for the VASP code.
NR 54
TC 12
Z9 12
U1 2
U2 48
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 63
EP 69
DI 10.1016/j.jnucmat.2013.04.058
PG 7
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600010
ER
PT J
AU Wang, LY
Li, MM
Almer, J
AF Wang, Leyun
Li, Meimei
Almer, Jonathan
TI In situ characterization of Grade 92 steel during tensile deformation
using concurrent high energy X-ray diffraction and small angle X-ray
scattering
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID MARTENSITIC STEEL; NEUTRON-DIFFRACTION; CREEP; TEMPERATURE; SYNCHROTRON;
NUCLEATION; STABILITY; EVOLUTION; CEMENTITE; STRENGTH
AB The tensile deformation in Grade 92 steel was studied in situ using simultaneous high energy X-ray diffraction (HE-XRD), radiography, and small angle X-ray scattering (SAXS) at room temperature (RT), 400, and 650 degrees C. Temperature-dependent elastic properties, i.e. Young's modulus and Poisson's ratio, were measured for alpha-Fe matrix, M23C6 and Nb(C,N) phases in various crystallographic orientation. Significant differences in the evolution of lattice strain, peak broadening/sharpening, and void development in the a-Fe matrix, M23C6 and Nb(C,N) precipitates revealed markedly different deformation and damage mechanisms at low and high temperature in the alloy. The strengthening effect of each type of precipitates measured by lattice strain agrees with the dislocation pile-up model at room temperature, while a different dislocation behavior was observed at 650 degrees C. Void volume fraction as a function of strain measured by SAXS can be described by a classic void nucleation and growth model at room temperature but not at 650 degrees C, implying a different damage process at high temperature. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Wang, Leyun; Li, Meimei; Almer, Jonathan] Argonne Natl Lab, Argonne, IL 60439 USA.
RP Wang, LY (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM leyunwang@anl.gov
FU U.S. Department of Energy [DE-AC02-06CH11357]
FX This work was supported under the U.S. Department of Energy Contract
DE-AC02-06CH11357. Use of the Advanced Photon Source is supported by the
U.S. Department of Energy, Office of Science. We also appreciate the
valuable discussion with Dr. Jan Ilavsky on the proper use of the Irena
package for SAXS data analysis.
NR 42
TC 14
Z9 14
U1 2
U2 37
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 81
EP 90
DI 10.1016/j.jnucmat.2013.04.063
PG 10
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600012
ER
PT J
AU Van den Bosch, J
Anderoglu, O
Dickerson, R
Hartl, M
Dickerson, P
Aguiar, JA
Hosemann, P
Toloczko, MB
Maloy, SA
AF Van den Bosch, J.
Anderoglu, O.
Dickerson, R.
Hartl, M.
Dickerson, P.
Aguiar, J. A.
Hosemann, P.
Toloczko, M. B.
Maloy, S. A.
TI SANS and TEM of ferritic-martensitic steel T91 irradiated in FFTF up to
184 dpa at 413 degrees C
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID MICROSTRUCTURAL EXAMINATION; NEUTRON-SCATTERING; ALLOYS; CREEP;
STABILITY; PHASES; HEATS
AB Ferritic-martensitic steel T91 was previously irradiated in the Materials Open Test Assembly (MOTA) program of the Fast Flux Test Reactor Facility (FFTF) at 413 degrees C up to 184 dpa. The microstructure was analyzed by small angle neutron scattering (SANS) and transmission electron microscopy (TEM). Both SANS and TEM revealed a large fraction of voids with an average size of 29-32 nm leading to a calculated void swelling of 1.2-1.6% based on the volume fraction of the voids in the sample. SANS gave no indication of second phase particles having formed under irradiation in the material. Using TEM, one zone was found where a few G-phase particles were analyzed. Quantities were however too low to state reliable particle densities. No alpha prime (alpha') or Laves phase were observed in any of the investigated zones. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Van den Bosch, J.; Anderoglu, O.; Dickerson, R.; Hartl, M.; Dickerson, P.; Aguiar, J. A.; Hosemann, P.; Maloy, S. A.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Van den Bosch, J.] CEN SCK, B-2400 Mol, Belgium.
[Hosemann, P.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA.
[Toloczko, M. B.] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Van den Bosch, J (reprint author), CEN SCK, B-2400 Mol, Belgium.
EM jvdbosch@sckcen.be
RI Hartl, Monika/F-3094-2014; Maloy, Stuart/A-8672-2009; Hartl,
Monika/N-4586-2016
OI Hartl, Monika/0000-0002-6601-7273; Maloy, Stuart/0000-0001-8037-1319;
Hartl, Monika/0000-0002-6601-7273
FU Fuel Cycle Research and Development program; Department of Energy's
Office of Basic Energy Sciences; DOE [DE-AC52-06NA25396]
FX This research is funded by Fuel Cycle Research and Development program.
Authors thank T. Romero for the hot cell work. This work has benefitted
from the use of the Manuel Lujan, Jr. Neutron Scattering Center at Los
Alamos National Laboratory, which is funded by the Department of
Energy's Office of Basic Energy Sciences. Los Alamos National laboratory
is operated by Los Alamos National Security LLC under DOE Contract
DE-AC52-06NA25396.
NR 24
TC 6
Z9 6
U1 2
U2 26
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
EI 1873-4820
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 91
EP 97
DI 10.1016/j.jnucmat.2013.04.025
PG 7
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600013
ER
PT J
AU Fraile, A
Cuesta-Lopez, S
Iglesias, R
Caro, A
Perlado, JM
AF Fraile, A.
Cuesta-Lopez, S.
Iglesias, R.
Caro, A.
Perlado, J. M.
TI Atomistic molecular point of view for liquid lead and lithium in Nuclear
Fusion technology
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID BLANKET CONCEPT; METALS; DYNAMICS
AB Understanding the behavior and properties of liquid metals is a crucial milestone in different current Nuclear Technology developments. Extracting both structural and dynamical properties of liquid metals via Molecular Dynamics simulations, represents a strong pillar for multiscale modeling efforts aiming to understand the suitability of these compounds. Here we present first results on the validation of two semi-empirical potentials for Li and Pb in liquid phase. Our results establish a solid base as a previous, but crucial step, to implement a LiPb cross potential. Structural and thermodynamical analyses confirm that the analyzed potentials for Li and Pb are sufficiently accurate to simulate both elements in the liquid phase, and in conditions of interest for Nuclear Technology. (C) 2013 Published by Elsevier B.V.
C1 [Fraile, A.; Perlado, J. M.] Univ Politecn Madrid, ETSI Ind, Inst Fus Nucl, E-28006 Madrid, Spain.
[Cuesta-Lopez, S.] Univ Burgos, Burgos 09001, Spain.
[Iglesias, R.] Univ Oviedo, Dept Fis, E-33007 Oviedo, Spain.
[Caro, A.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Cuesta-Lopez, S (reprint author), Univ Burgos, Parque Cient I D I,Plaza Misael Banuelos S-N, Burgos 09001, Spain.
EM scuesta@ubu.es
OI Cuesta-Lopez, Santiago/0000-0002-7401-3889; Iglesias,
Roberto/0000-0002-6406-7883
FU Spanish National Project on Breeding Blanket Technologies TECNO_FUS
through CONSOLIDER_INGENIO Programme
FX We are grateful to Professor D. Belashchenko for providing us details on
his lithium EAM potential and fruitful comments. We thank CESGA (Centro
de Supercomputacion de Galicia), for granting us computing resources.
This work was partially funded by the Spanish National Project on
Breeding Blanket Technologies TECNO_FUS through CONSOLIDER_INGENIO 2010
Programme.
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PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 98
EP 103
DI 10.1016/j.jnucmat.2013.04.001
PG 6
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600014
ER
PT J
AU Egeland, GW
Mariani, RD
Hartmann, T
Porter, DL
Hayes, SL
Kennedy, JR
AF Egeland, G. W.
Mariani, R. D.
Hartmann, T.
Porter, D. L.
Hayes, S. L.
Kennedy, J. R.
TI Reduction of FCCI effects in lanthanide-iron diffusion couples by doping
with palladium
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID CLADDING CHEMICAL INTERACTION; RARE-EARTH METALS; STAINLESS-STEEL; MINOR
ACTINIDES; ALLOY SYSTEM; FUEL; NEODYMIUM; BARRIER; CERIUM; PERFORMANCE
AB Fast-reactor metallic fuels produce lanthanide fission products which have been shown to diffuse to the fuel periphery. Lanthanides interacting with the cladding is one cause of fuel-cladding chemical interaction. To test the viability of reducing the interaction by pinning these lanthanides, palladium was chosen as a fuel dopant based on the lanthanide-palladium intermetallic thermodynamic stability and fuel compatibility. Three lanthanides were tested, neodymium, cerium, and praseodymium, along with their 1:1 palladium compounds, against iron using diffusion couples. These experiments show the direct contact effect on iron of each lanthanide and its respective palladium compound at temperatures from 580 degrees C to 700 degrees C for 100 h. (C) 2013 Published by Elsevier B.V.
C1 [Egeland, G. W.; Hartmann, T.] Univ Nevada, Harry Reid Ctr Environm Studies, Las Vegas, NV 89154 USA.
[Mariani, R. D.; Porter, D. L.; Hayes, S. L.; Kennedy, J. R.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Egeland, GW (reprint author), Univ Nevada, Harry Reid Ctr Environm Studies, Las Vegas, NV 89154 USA.
EM gerald.egeland@gmail.com
RI Hayes, Steven/D-8373-2017
OI Hayes, Steven/0000-0002-7583-2069
FU Radiochemistry Department; Harry Reid Center for Environmental Studies
at the University of Nevada Las Vegas; DOE [DE-AC07-05ID14517]
FX We would like to thank those with the Radiochemistry Department and the
Harry Reid Center for Environmental Studies at the University of Nevada
Las Vegas for support and assistance. This program was funded by DOE
Contract No. DE-AC07-05ID14517.
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PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
EI 1873-4820
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 178
EP 192
DI 10.1016/j.jnucmat.2013.04.060
PG 15
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600025
ER
PT J
AU Tonks, MR
Millett, PC
Nerikar, P
Du, S
Andersson, D
Stanek, CR
Gaston, D
Andrs, D
Williamson, R
AF Tonks, Michael R.
Millett, Paul C.
Nerikar, Pankaj
Du, Shiyu
Andersson, David
Stanek, Christopher R.
Gaston, Derek
Andrs, David
Williamson, Richard
TI Multiscale development of a fission gas thermal conductivity model:
Coupling atomic, meso and continuum level simulations
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID IRRADIATED UO2 FUEL; MOLECULAR-DYNAMICS; URANIUM-DIOXIDE; NUCLEAR-FUEL;
THERMOPHYSICAL PROPERTIES; RELEASE; HELIUM
AB Fission gas production and evolution significantly impact the fuel performance, causing swelling, a reduction in the thermal conductivity and fission gas release. However, typical empirical models of fuel properties treat each of these effects separately and uncoupled. Here, we couple a fission gas release model to a model of the impact of fission gas on the fuel thermal conductivity. To quantify the specific impact of grain boundary (GB) bubbles on the thermal conductivity, we use atomistic and mesoscale simulations. Atomistic molecular dynamic simulations were employed to determine the GB thermal resistance. These values were then used in mesoscale heat conduction simulations to develop a mechanistic expression for the effective GB thermal resistance of a GB containing gas bubbles, as a function of the percentage of the GB covered by fission gas. The coupled fission gas release and thermal conductivity model was implemented in Idaho National Laboratory's BISON fuel performance code to model the behavior of a 10-pellet LWR fuel rodlet, showing how the fission gas impacts the UO2 thermal conductivity. Furthermore, additional BISON simulations were conducted to demonstrate the impact of average grain size on both the fuel thermal conductivity and the fission gas release. Published by Elsevier B.V.
C1 [Tonks, Michael R.; Millett, Paul C.; Gaston, Derek; Andrs, David; Williamson, Richard] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
[Nerikar, Pankaj; Du, Shiyu; Andersson, David; Stanek, Christopher R.] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA.
RP Tonks, MR (reprint author), Idaho Natl Lab, POB 1625, Idaho Falls, ID 83415 USA.
EM Michael.Tonks@inl.gov
OI Williamson, Richard/0000-0001-7734-3632
FU Department of Energy Nuclear Energy Advanced Modeling and Simulation
program; US Department of Energy [DE-AC07-05ID14517]
FX The authors thank Jason Hales from Idaho National Laboratory for his
help with the BISON fuel performance code and Mark Horstemeyer from
Mississippi State University for discussions on ISV theory. This work
was funded by the Department of Energy Nuclear Energy Advanced Modeling
and Simulation program. This manuscript has been authored by Battelle
Energy Alliance, LLC under Contract No. DE-AC07-05ID14517 with the US
Department of Energy. The United States Government retains and the
publisher, by accepting the article for publication, acknowledges that
the United States Government retains a nonexclusive, paid-up,
irrevocable, world-wide license to publish or reproduce the published
form of this manuscript, or allow others to do so, for United States
Government purposes.
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PI AMSTERDAM
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SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 193
EP 200
DI 10.1016/j.jnucmat.2013.05.008
PG 8
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600026
ER
PT J
AU Wang, H
Wang, JAJ
Tan, T
Jiang, H
Cox, TS
Howard, RL
Bevard, BB
Flanagan, M
AF Wang, Hong
Wang, Jy-An John
Tan, Ting
Jiang, Hao
Cox, Thomas S.
Howard, Rob L.
Bevard, Bruce B.
Flanagan, Michelle
TI Development of U-frame bending system for studying the vibration
integrity of spent nuclear fuel
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID FATIGUE; LIFE
AB A bending fatigue system developed to evaluate the response of spent nuclear fuel rods to vibration loads is presented. A U-frame testing setup is used for imposing bending loads on the fuel rod specimen. The U-frame setup consists of two rigid arms, side connecting plates to the rigid arms, and linkages to a universal testing machine. The test specimen's curvature is obtained through a three-point deflection measurement method. The tests using surrogate specimens with stainless steel cladding revealed increased flexural rigidity under unidirectional cyclic bending, significant effect of cladding-pellets bonding on the response of surrogate rods, and substantial cyclic softening in reverse bending mode. These phenomena may cast light on the expected response of a spent nuclear fuel rod. The developed U-frame system is thus verified and demonstrated to be ready for further pursuit in hot-cell tests. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Wang, Hong; Wang, Jy-An John; Tan, Ting; Jiang, Hao; Cox, Thomas S.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
[Howard, Rob L.; Bevard, Bruce B.] Oak Ridge Natl Lab, Reactor & Nucl Syst Div, Oak Ridge, TN 37831 USA.
[Flanagan, Michelle] US Nucl Regulatory Commiss, Off Nucl Regulatory Res, Washington, DC 20555 USA.
RP Wang, JAJ (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, 1 Bethel Valley Rd, Oak Ridge, TN 37831 USA.
EM wangja@ornl.gov
RI Wang, Hong/O-1987-2016;
OI Wang, Hong/0000-0002-0173-0545; Bevard, Bruce/0000-0002-0272-186X; Wang,
Jy-An/0000-0003-2402-3832
FU NRC RES under DOE [DE-AC05-00OR22725]; UT-Battelle, LLC
FX The authors gratefully acknowledge Dr. James Hemrick for reviewing this
manuscript. Authors also want to thank Brian Sparks, and Randy J. Parten
of ORNL for their help in machining the components of the U-frame setup.
The research was sponsored by NRC RES under DOE contract
DE-AC05-00OR22725 with UT-Battelle, LLC.
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PI AMSTERDAM
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SN 0022-3115
EI 1873-4820
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 201
EP 213
DI 10.1016/j.jnucmat.2013.05.009
PG 13
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600027
ER
PT J
AU Dremov, VV
Sapozhnikov, FA
Ionov, GV
Karavaev, AV
Vorobyova, MA
Chung, BW
AF Dremov, V. V.
Sapozhnikov, F. A.
Ionov, G. V.
Karavaev, A. V.
Vorobyova, M. A.
Chung, B. W.
TI MD simulations of phase stability of PuGa alloys: Effects of primary
radiation defects and helium bubbles
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID GA ALLOYS; PLUTONIUM; DYNAMICS; DELTA; METAL
AB We present classical molecular dynamics (MD) with Modified Embedded Atom Model (MEAM) simulations to investigate the role of primary radiation defects and radiogenic helium as factors affecting the phase stability of PuGa alloys in cooling-heating cycles at ambient pressure. The models of PuGa alloys equilibrated at ambient conditions were subjected to cooling-heating cycles in which they were initially cooled down to 100 K and then heated up to 500 K at ambient pressure. The rate of temperature change in the cycles was 10 K/ns. The simulations showed that the initial FCC phase of PuGa alloys undergo polymorphous transition in cooling to a lower symmetry alpha'-phase. All the alloys undergo direct and reverse polymorphous transitions in the cooling-heating cycles. The alloys containing vacancies shift in both transitions to lower temperatures relative to the defect-free alloys. The radiogenic helium has much less effect on the phase stability compared to that of primary radiation defects (in spite of the fact that helium concentration is twice of that for the primary radiation defects). This computational result agrees with experimental data on unconventional stabilization mechanism of PuGa alloys. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Dremov, V. V.; Sapozhnikov, F. A.; Ionov, G. V.; Karavaev, A. V.; Vorobyova, M. A.] Russian Fed Nucl Ctr, Inst Tech Phys, Snezhinsk 456770, Chelyabinsk Reg, Russia.
[Chung, B. W.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Dremov, VV (reprint author), Russian Fed Nucl Ctr, Inst Tech Phys, 13 Vasiliev St, Snezhinsk 456770, Chelyabinsk Reg, Russia.
EM vvd0531@mail.ru
RI Chung, Brandon/G-2929-2012; Karavaev, Alexey/D-5306-2013
OI Karavaev, Alexey/0000-0002-2661-9616
FU Russian Scientific Research Institute of Technical Physics (VNIITF)
[B582483]; Lawrence Levermore National Laboratory [B582483]
FX The work was performed through collaboration authorized under Contract
B582483 between the All-Russian Scientific Research Institute of
Technical Physics (VNIITF) and Lawrence Levermore National Laboratory.
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PI AMSTERDAM
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SN 0022-3115
EI 1873-4820
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 278
EP 282
DI 10.1016/j.jnucmat.2013.05.016
PG 5
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600036
ER
PT J
AU Yu, KY
Liu, Y
Fu, EG
Wang, YQ
Myers, MT
Wang, H
Shao, L
Zhang, X
AF Yu, K. Y.
Liu, Y.
Fu, E. G.
Wang, Y. Q.
Myers, M. T.
Wang, H.
Shao, L.
Zhang, X.
TI Comparisons of radiation damage in He ion and proton irradiated
immiscible Ag/Ni nanolayers
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID DISLOCATION-OBSTACLE INTERACTIONS; GRAIN-BOUNDARIES; MULTILAYERS;
METALS; TOLERANCE; SIZE; NI; COMPOSITES; HYDROGEN; DEFECTS
AB We compare the evolution of microstructure and mechanical properties of Ag/Ni multilayers of varying layer thickness (1-200 nm) subjected to helium ion and proton irradiation at room temperature to similar dose, similar to 2 displacements-per-atom on average. Layer structure remained intact after both types of irradiation although defects accumulated in the layers are different. Helium bubbles were the major defects in helium ion irradiated films, while dislocation loops were ubiquitous in proton irradiated multilayers. In He ion irradiated multilayers, radiation hardening was greater than that in proton irradiated specimens, and the magnitude of hardening decreased with decreasing individual layer thickness. In comparison no size dependent hardening was observed in proton irradiated films. Mechanisms of irradiation induced hardening were discussed. Published by Elsevier B.V.
C1 [Yu, K. Y.; Liu, Y.; Zhang, X.] Texas A&M Univ, Dept Mech Engn, Dept Mat Sci & Engn, College Stn, TX 77843 USA.
[Fu, E. G.] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China.
[Wang, Y. Q.] Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA.
[Myers, M. T.; Shao, L.] Texas A&M Univ, Dept Nucl Engn, College Stn, TX 77843 USA.
[Wang, H.] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA.
RP Zhang, X (reprint author), Texas A&M Univ, Dept Mech Engn, Dept Mat Sci & Engn, College Stn, TX 77843 USA.
EM zhangx@tamu.edu
RI Yu, Kaiyuan /B-8398-2014; Liu, Yue/H-4071-2014; Zhang,
Xinghang/H-6764-2013; Wang, Haiyan/P-3550-2014
OI Yu, Kaiyuan /0000-0002-5442-2992; Liu, Yue/0000-0001-8518-5734; Zhang,
Xinghang/0000-0002-8380-8667; Wang, Haiyan/0000-0002-7397-1209
FU US Army Research Office - Materials Science Division [W911NF-09-1-0223];
NSF [CMMI-0846835]; Center for Integrated Nanotechnologies (CINT) under
Los Alamos National Laboratory
FX XZ acknowledges financial support by US Army Research Office - Materials
Science Division, under contract No. W911NF-09-1-0223. LS acknowledges
the support by NSF under Grant no. CMMI-0846835. Support by Center for
Integrated Nanotechnologies (CINT) under user agreement at Los Alamos
National Laboratory is also acknowledged.
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SN 0022-3115
EI 1873-4820
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 310
EP 318
DI 10.1016/j.jnucmat.2013.04.069
PG 9
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600041
ER
PT J
AU Cockeram, BV
Byun, TS
Leonard, KJ
Hollenbeck, JL
Snead, LL
AF Cockeram, B. V.
Byun, T. S.
Leonard, K. J.
Hollenbeck, J. L.
Snead, L. L.
TI Post-irradiation fracture toughness of unalloyed molybdenum, ODS
molybdenum, and TZM molybdenum following irradiation at 244 degrees C to
507 degrees C
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID TITANIUM-0.1 PCT ZIRCONIUM; FAST-NEUTRON IRRADIATION; MO-5-PERCENT RE
ALLOYS; CARBON ARC-CAST; TENSILE PROPERTIES; TEMPERATURE-DEPENDENCE;
ANNEALED CONDITIONS; WROUGHT LCAC; MICROSTRUCTURE; REACTOR
AB Commercially available unalloyed molybdenum (Low Carbon Arc Cast (LCAC)), Oxide Dispersion Strengthened (ODS) molybdenum, and TZM molybdenum were subject to fracture toughness testing following neutron irradiation at temperatures of nominally 244 degrees C, 407 degrees C, and 509 degrees C to neutron fluences between 1.0 and 4.6 x 10(25) n/m(2) (E > 0.1 MeV). All alloys exhibited a Ductile to Brittle Transition Temperature that was defined to occur at 30 +/- 4 MPa root m. The highest post-irradiated fracture toughness values (26-107 MPa root m) and lowest DBTT (100-150 degrees C) was observed for ODS molybdenum in the longitudinal orientation. The results for ODS molybdenum are anisotropic with lower post-irradiated toughness values (20-30 MPa root m) and higher DBTT (450-600 degrees C) in the transverse (T-L) orientation. The results for ODS molybdenum are better than those for LCAC molybdenum (21-71 MPa root m and 450-800 degrees C DBTT). The fracture toughness values measured for LCAC and T-L ODS molybdenum at temperatures below the DBTT were determined to be 8-18 MPa root m. The role of microstructure and grain size on post-irradiated fracture toughness was evaluated. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Cockeram, B. V.; Hollenbeck, J. L.] Bechtel Marine Prop Corp Inc, West Mifflin, PA 15122 USA.
[Byun, T. S.; Leonard, K. J.; Snead, L. L.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Cockeram, BV (reprint author), Bechtel Marine Prop Corp Inc, POB 79, West Mifflin, PA 15122 USA.
EM bcockeram@verizon.net
FU USDOE [DE-AC11-98PN38206]; ORNL's Shared Research Equipment (ShaRE) User
Facility; Office of Basic Energy Sciences, U.S. Department of Energy
FX This work was supported under USDOE Contract No. DE-AC11-98PN38206. The
following ORNL personnel contributed to this work by specimen
preparation and testing (M.M. Lee, J.P. Strizak, A.W. Williams, and J.L.
Bailey). The authors acknowledge D. Ward at Bettis for void size/number
analysis and R.W. Smith and J.E. Hack for numerous discussions on this
work. Research supported in part by ORNL's Shared Research Equipment
(ShaRE) User Facility, which is sponsored by the Office of Basic Energy
Sciences, U.S. Department of Energy.
NR 52
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SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 382
EP 413
DI 10.1016/j.jnucmat.2013.05.027
PG 32
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600048
ER
PT J
AU Pint, BA
Terrani, KA
Brady, MP
Cheng, T
Keiser, JR
AF Pint, B. A.
Terrani, K. A.
Brady, M. P.
Cheng, T.
Keiser, J. R.
TI High temperature oxidation of fuel cladding candidate materials in
steam-hydrogen environments
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article
ID FE-CR ALLOYS; WATER-VAPOR; MODEL ALLOYS; BEHAVIOR; STEELS;
VOLATILIZATION; PERFORMANCE; ZIRCALOY-4; KINETICS
AB Alternative fuel cladding materials to Zr alloys are being investigated for enhanced accident tolerance, which specifically involves oxidation resistance to steam or steam-H-2 environments at >= 1200 degrees C for short times. Based on a comparison of a range of commercial and model alloys, conventional austenitic steels do not have sufficient oxidation resistance with only similar to 18Cr-10Ni. Higher alloyed type 310 stainless steel is protective but Ni is not a desirable alloy addition for this application. Results at 1350 degrees C indicated that FeCrAl alloys and CVD SiC remain oxidation resistant in steam. At 1200 degrees C, high (>= 25% Cr) ferritic alloys appear to be good candidates for this application. Higher pressures (up to 20.7 bar) and H-2 additions appeared to have a limited effect on the oxidation behavior of the most oxidation resistant alloys, but higher pressures accelerated the maximum metal loss for less oxidation resistant steels and less metal loss was observed for type 317 L tubing in a H-2-50%H2O environment at 10.3 bar compared to 100% H2O. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Pint, B. A.; Terrani, K. A.; Brady, M. P.; Cheng, T.; Keiser, J. R.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Pint, BA (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA.
EM pintba@ornl.gov
RI Brady, Michael/A-8122-2008; Pint, Bruce/A-8435-2008
OI Brady, Michael/0000-0003-1338-4747; Pint, Bruce/0000-0002-9165-3335
FU U.S. Department of Energy's Office of Nuclear Energy, Advanced Fuel
Campaign of the Fuel Cycle RD program
FX The experimental work was conducted by M. Howell, M. Stephens, T. Lowe,
H. Longmire, J. Mayotte and T. Jordan. Y. Yamamoto and S.J. Pawel
provided useful comments on the manuscript. This research was funded by
the U.S. Department of Energy's Office of Nuclear Energy, Advanced Fuel
Campaign of the Fuel Cycle R&D program.
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SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 420
EP 427
DI 10.1016/j.jnucmat.2013.05.047
PG 8
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600050
ER
PT J
AU Costantini, JM
Beuneu, F
Weber, WJ
AF Costantini, Jean-Marc
Beuneu, Francois
Weber, William J.
TI Radiation damage in cubic-stabilized zirconia
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT Conference on Nuclear Materials (NuMat)
CY OCT 22-25, 2012
CL Osaka, JAPAN
ID CHARGED-PARTICLE IRRADIATIONS; SINGLE-CRYSTALS; COMPUTER-SIMULATION;
THERMAL RECOVERY; DEFECT STRUCTURE; INERT MATRIX; ELECTRON; OXIDE; FUEL;
CONDUCTIVITY
AB Cubic yttria-stabilized zirconia (YSZ) can be used for nuclear applications as an inert matrix for actinide immobilization or transmutation. Indeed, the large amount of native oxygen vacancies leads to a high radiation tolerance of this material owing to defect recombination occurring in the atomic displacement cascades induced by fast neutron irradiation or ion implantations, as showed by molecular dynamics (MD) simulations. Amorphization cannot be obtained in YSZ either by nuclear-collision or electronic-excitation damage, just like in urania. A kind of polygonization structure with slightly disoriented crystalline domains is obtained in both cases. In the first steps of damage, specific isolated point defects (like F+-type color centers) and point-defect clusters are produced by nuclear collisions with charged particles or neutrons. Further increase of damage leads to dislocation-loop formation then to collapse of the dislocation network into a polygonization structure. For swift heavy ion irradiations, a similar polygonization structure is obtained above a threshold stopping power value of about 20-30 keV nm(-1). (C) 2013 Elsevier B.V. All rights reserved.
C1 [Costantini, Jean-Marc] CEA, DEN, SRMA, F-91191 Gif Sur Yvette, France.
[Beuneu, Francois] Ecole Polytech, CNRS, CEA, LSI, F-91128 Palaiseau, France.
[Weber, William J.] Univ Tennessee, Knoxville, TN 37996 USA.
[Weber, William J.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Costantini, JM (reprint author), CEA, DEN, SRMA, F-91191 Gif Sur Yvette, France.
EM jean-marc.costantini@cea.fr
RI Weber, William/A-4177-2008
OI Weber, William/0000-0002-9017-7365
NR 64
TC 10
Z9 10
U1 3
U2 54
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
EI 1873-4820
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 508
EP 514
DI 10.1016/j.jnucmat.2013.02.041
PG 7
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600062
ER
PT J
AU Colas, KB
Motta, AT
Daymond, MR
Almer, JD
AF Colas, Kimberly B.
Motta, Arthur T.
Daymond, Mark R.
Almer, Jonathan D.
TI Effect of thermo-mechanical cycling on zirconium hydride reorientation
studied in situ with synchrotron X-ray diffraction
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT NuMat Conference
CY OCT 22-25, 2012
CL Osaka, JAPAN
ID PRECIPITATION; DISSOLUTION; ZIRCALOY; ALLOYS; KINETICS
AB The circumferential hydrides normally present in nuclear reactor fuel cladding after reactor exposure may dissolve during drying for dry storage and re-precipitate when cooled under load into a more radial orientation, which could embrittle the fuel cladding. It is necessary to study the rates and conditions under which hydride reorientation may happen in order to assess fuel integrity in dry storage.
The objective of this work is to study the effect of applied stress and thermal cycling on the hydride morphology in cold-worked stress-relieved Zircaloy-4 by combining conventional metallography and in situ X-ray diffraction techniques. Metallography is used to study the evolution of hydride morphology after several thermo-mechanical cycles. In situ X-ray diffraction performed at the Advanced Photon Source synchrotron provides real-time information on the process of hydride dissolution and precipitation under stress during several thermal cycles. The detailed study of diffracted intensity, peak position and full-width at half-maximum provides information on precipitation kinetics, elastic strains and other characteristics of the hydride precipitation process.
The results show that thermo-mechanical cycling significantly increases the radial hydride fraction as well as the hydride length and connectivity. The radial hydrides are observed to precipitate at a lower temperature than circumferential hydrides. Variations in the magnitude and range of hydride strains due to reorientation and cycling have also been observed. These results are discussed in light of existing models and experiments on hydride reorientation. The study of hydride elastic strains during precipitation shows marked differences between circumferential and radial hydrides, which can be used to investigate the reorientation process. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Colas, Kimberly B.; Motta, Arthur T.] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA.
[Daymond, Mark R.] Queens Univ, Dept Mech & Mat Engn, Kingston, ON K7L 3N6, Canada.
[Almer, Jonathan D.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Colas, KB (reprint author), CEA Saclay, French Atom Energy Commiss, DEN DANS DMN SEMI LM2E, F-91191 Gif Sur Yvette, France.
EM kimberly.colas@cea.fr
OI Colas, Kimberly/0000-0002-5270-5462; Daymond, Mark/0000-0001-6242-7489
NR 26
TC 10
Z9 10
U1 1
U2 28
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 586
EP 595
DI 10.1016/j.jnucmat.2013.04.047
PG 10
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600075
ER
PT J
AU Tremsin, AS
Vogel, SC
Mock, M
Bourke, MAM
Yuan, V
Nelson, RO
Brown, DW
Feller, WB
AF Tremsin, A. S.
Vogel, S. C.
Mock, M.
Bourke, M. A. M.
Yuan, V.
Nelson, R. O.
Brown, D. W.
Feller, W. B.
TI Non-destructive studies of fuel pellets by neutron resonance absorption
radiography and thermal neutron radiography
SO JOURNAL OF NUCLEAR MATERIALS
LA English
DT Article; Proceedings Paper
CT NuMat Conference
CY OCT 22-25, 2012
CL Osaka, JAPAN
ID TEMPERATURE-MEASUREMENT; TRANSMISSION SPECTROSCOPY; WATER DISTRIBUTION;
TIME; TOMOGRAPHY; EFFICIENCY; DETECTOR; CAPTURE
AB Many isotopes in nuclear materials exhibit strong peaks in neutron absorption cross sections in the epithermal energy range (1-1000 eV). These peaks (often referred to as resonances) occur at energies specific to particular isotopes, providing a means of isotope identification and concentration measurements. The high penetration of epithermal neutrons through most materials is very useful for studies where samples consist of heavy-Z elements opaque to X-rays and sometimes to thermal neutrons as well. The characterization of nuclear fuel elements in their cladding can benefit from the development of high resolution neutron resonance absorption imaging (NRAI), enabled by recently developed spatially-resolved neutron time-of-flight detectors. In this technique the neutron transmission of the sample is measured as a function of spatial location and of neutron energy. In the region of the spectra that borders the resonance energy for a particular isotope, the reduction in transmission can be used to acquire an image revealing the 2-dimensional distribution of that isotope within the sample. Provided that the energy of each transmitted neutron is measured by the neutron detector used and the irradiated sample possesses neutron absorption resonances, then isotope-specific location maps can be acquired simultaneously for several isotopes. This can be done even in the case where samples are opaque or have very similar transmission for thermal neutrons and X-rays or where only low concentrations of particular isotopes are present (<0.1 atom% in some cases). Ultimately, such radiographs of isotope location can be utilized to measure isotope concentration, and can even be combined to produce three-dimensional distributions using tomographic methods.
In this paper we present the proof-of-principle of NRAI and transmission Bragg edge imaging performed at Flight Path 5 (FP5) at the LANSCE pulsed, moderated neutron source of Los Alamos National Laboratory. A set of urania mockup fuel assemblies with intentionally introduced defects was investigated. The maps of elemental composition of pellets containing urania and tungsten were obtained simultaneously by resonance absorption imaging with spatial resolution better than similar to 200 mu M, while the voids and cracks were revealed by the transmission images obtained with thermal and cold neutrons. Our proof-of-principle experiments demonstrate that simultaneous acquisition of resonance and Bragg edge spectra enables concurrent mapping of isotope distributions, imaging of cracks and voids as well as measurements of some crystallographic parameters of fuel assemblies and their cladding. A detailed study of energy-dependent neutron statistics achievable at FP5 with our present detection system is also presented for a wide range of neutron energies. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Tremsin, A. S.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Vogel, S. C.; Mock, M.; Bourke, M. A. M.; Yuan, V.; Nelson, R. O.; Brown, D. W.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Feller, W. B.] NOVA Sci Inc, Sturbridge, MA 01566 USA.
RP Tremsin, AS (reprint author), Univ Calif Berkeley, Berkeley, CA 94720 USA.
EM ast@ssl.berkeley.edu
OI Mocko, Michael/0000-0003-0447-4687; Vogel, Sven C./0000-0003-2049-0361
NR 52
TC 10
Z9 10
U1 3
U2 25
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3115
J9 J NUCL MATER
JI J. Nucl. Mater.
PD SEP
PY 2013
VL 440
IS 1-3
BP 633
EP 646
DI 10.1016/j.jnucmat.2013.06.007
PG 14
WC Materials Science, Multidisciplinary; Nuclear Science & Technology
SC Materials Science; Nuclear Science & Technology
GA 204UL
UT WOS:000323396600082
ER
PT J
AU Lee, BS
Gapud, EJ
Zhang, SC
Dorsett, Y
Bredemeyer, A
George, R
Callen, E
Daniel, JA
Osipovich, O
Oltz, EM
Bassing, CH
Nussenzweig, A
Lees-Miller, S
Hammel, M
Chen, BPC
Sleckman, BP
AF Lee, Baeck-Seung
Gapud, Eric J.
Zhang, Shichuan
Dorsett, Yair
Bredemeyer, Andrea
George, Rosmy
Callen, Elsa
Daniel, Jeremy A.
Osipovich, Oleg
Oltz, Eugene M.
Bassing, Craig H.
Nussenzweig, Andre
Lees-Miller, Susan
Hammel, Michal
Chen, Benjamin P. C.
Sleckman, Barry P.
TI Functional Intersection of ATM and DNA-Dependent Protein Kinase
Catalytic Subunit in Coding End Joining during V(D)J Recombination
SO MOLECULAR AND CELLULAR BIOLOGY
LA English
DT Article
ID DOUBLE-STRAND-BREAK; TELANGIECTASIA MUTATED ATM; ATAXIA-TELANGIECTASIA;
SIGNAL JOINT; LYMPHOCYTE DEVELOPMENT; GENOMIC INSTABILITY; NONSENSE
MUTATION; CELL-LINES; PKCS; REPAIR
AB V(D)J recombination is initiated by the RAG endonuclease, which introduces DNA double-strand breaks (DSBs) at the border between two recombining gene segments, generating two hairpin-sealed coding ends and two blunt signal ends. ATM and DNA-dependent protein kinase catalytic subunit (DNA-PKcs) are serine-threonine kinases that orchestrate the cellular responses to DNA DSBs. During V(D) J recombination, ATM and DNA-PKcs have unique functions in the repair of coding DNA ends. ATM deficiency leads to instability of postcleavage complexes and the loss of coding ends from these complexes. DNA-PKcs deficiency leads to a nearly complete block in coding join formation, as DNA-PKcs is required to activate Artemis, the endonuclease that opens hairpin-sealed coding ends. In contrast to loss of DNA-PKcs protein, here we show that inhibition of DNA-PKcs kinase activity has no effect on coding join formation when ATM is present and its kinase activity is intact. The ability of ATM to compensate for DNA-PKcs kinase activity depends on the integrity of three threonines in DNA-PKcs that are phosphorylation targets of ATM, suggesting that ATM can modulate DNA-PKcs activity through direct phosphorylation of DNA-PKcs. Mutation of these threonine residues to alanine (DNA-PKcs(3A)) renders DNA-PKcs dependent on its intrinsic kinase activity during coding end joining, at a step downstream of opening hairpin-sealed coding ends. Thus, DNA-PKcs has critical functions in coding end joining beyond promoting Artemis endonuclease activity, and these functions can be regulated redundantly by the kinase activity of either ATM or DNA-PKcs.
C1 [Lee, Baeck-Seung; Gapud, Eric J.; Dorsett, Yair; Bredemeyer, Andrea; George, Rosmy; Osipovich, Oleg; Oltz, Eugene M.; Sleckman, Barry P.] Washington Univ, Sch Med, Dept Pathol & Immunol, St Louis, MO 63130 USA.
[Zhang, Shichuan; Chen, Benjamin P. C.] Univ Texas SW Med Ctr Dallas, Dept Radiat Oncol, Div Mol Radiat Biol, Dallas, TX 75390 USA.
[Callen, Elsa; Nussenzweig, Andre] NCI, Lab Genome Integr, NIH, Bethesda, MD 20892 USA.
[Daniel, Jeremy A.] Univ Copenhagen, Fac Hlth & Med Sci, Novo Nordisk Fdn Ctr Prot Res, Copenhagen, Denmark.
[Bassing, Craig H.] Univ Penn, Childrens Hosp Philadelphia, Dept Pathol & Lab Med, Ctr Childhood Canc Res,Div Canc Pathobiol, Philadelphia, PA 19104 USA.
[Bassing, Craig H.] Univ Penn, Dept Pathol & Lab Med, Abramson Family Canc Res Inst, Philadelphia, PA USA.
[Bassing, Craig H.] Univ Penn, Immunol Grad Grp, Perelman Sch Med, Philadelphia, PA 19104 USA.
[Lees-Miller, Susan] Univ Calgary, Dept Biochem & Mol Biol, Calgary, AB, Canada.
[Lees-Miller, Susan] Univ Calgary, Southern Alberta Canc Res Inst, Calgary, AB, Canada.
[Hammel, Michal] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Sleckman, BP (reprint author), Washington Univ, Sch Med, Dept Pathol & Immunol, St Louis, MO 63130 USA.
EM sleckman@immunology.wustl.edu
RI Daniel, Jeremy/S-4729-2016;
OI Daniel, Jeremy/0000-0002-1981-5571; Bredemeyer,
Andrea/0000-0003-2970-5998
FU National Institutes of Health [CA136470, AI074953, AI47829, CA92584,
GM105404]; Lawrence Berkeley National Lab IDAT program; CIHR [691369]
FX This work was supported by National Institutes of Health grants CA136470
(B. P. S.), AI074953 (B. P. S.), AI47829 (B. P. S.), CA92584 (S. L.-M.
and M. H.), and GM105404 (M. H.). M. H. was also supported by the
Lawrence Berkeley National Lab IDAT program, and S. L.-M. was supported
by CIHR grant 691369.
NR 64
TC 12
Z9 14
U1 0
U2 14
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0270-7306
J9 MOL CELL BIOL
JI Mol. Cell. Biol.
PD SEP
PY 2013
VL 33
IS 18
BP 3568
EP 3579
DI 10.1128/MCB.00308-13
PG 12
WC Biochemistry & Molecular Biology; Cell Biology
SC Biochemistry & Molecular Biology; Cell Biology
GA 208BQ
UT WOS:000323651200003
PM 23836881
ER
PT J
AU Hagos, S
Leung, R
Rauscher, SA
Ringler, T
AF Hagos, Samson
Leung, Ruby
Rauscher, Sara A.
Ringler, Todd
TI Error Characteristics of Two Grid Refinement Approaches in Aquaplanet
Simulations: MPAS-A and WRF
SO MONTHLY WEATHER REVIEW
LA English
DT Article
DE Convective parameterization; Model comparison; Model errors; Model
evaluation; performance; Multigrid models; Regional models
ID GENERAL-CIRCULATION MODEL; REGIONAL CLIMATE SIMULATION;
VARIABLE-RESOLUTION GCM; WESTERN UNITED-STATES; STANDARD TEST; PART I;
SENSITIVITY; PARAMETERIZATIONS; PRECIPITATION; CONVECTION
AB This study compares the error characteristics associated with two grid refinement approaches including global variable resolution and nesting for high-resolution regional climate modeling. The global variable-resolution model, Model for Prediction Across Scales-Atmosphere (MPAS-A), and the limited-area model, Weather Research and Forecasting Model (WRF), are compared in an idealized aquaplanet context. For MPAS-A, simulations have been performed with a quasi-uniform-resolution global domain at coarse (1 degrees) and high (0.25 degrees) resolution, and a variable-resolution domain with a high-resolution region at 0.25 degrees configured inside a coarse-resolution global domain at 1 degrees resolution. Similarly, WRF has been configured to run on a coarse (1 degrees) and high (0.25 degrees) tropical channel domain as well as a nested domain with a high-resolution region at 0.25 degrees nested two-way inside the coarse-resolution (1 degrees) tropical channel. The variable-resolution or nested simulations are compared against the high-resolution simulations. Both models respond to increased resolution with enhanced precipitation and significant reduction in the ratio of convective to nonconvective precipitation. The limited-area grid refinement induces zonal asymmetry in precipitation (heating), accompanied by zonal anomalous Walker-like circulations and standing Rossby wave signals. Within the high-resolution limited area, the zonal distribution of precipitation is affected by advection in MPAS-A and by the nesting strategy in WRF. In both models, the propagation characteristics of equatorial waves are not significantly affected by the variations in resolution.
C1 [Hagos, Samson; Leung, Ruby] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Rauscher, Sara A.; Ringler, Todd] Los Alamos Natl Lab, Los Alamos, NM USA.
RP Hagos, S (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd, Richland, WA 99352 USA.
EM samson.hagos@pnnl.gov
FU Regional and Global Climate Modeling Program of the U.S. Department of
Energy Biological and Environmental Research Program; U.S. Department of
Energy [DE-AC06-76RLO1830]
FX This work is supported by the Regional and Global Climate Modeling
Program of the U.S. Department of Energy Biological and Environmental
Research Program. Computing resources are provided by the National
Energy Research Scientific Computing Center (NERSC). Pacific Northwest
National Laboratory is operated by Battelle for the U.S. Department of
Energy under Contract DE-AC06-76RLO1830.
NR 41
TC 14
Z9 14
U1 1
U2 12
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0027-0644
J9 MON WEATHER REV
JI Mon. Weather Rev.
PD SEP
PY 2013
VL 141
IS 9
BP 3022
EP 3036
DI 10.1175/MWR-D-12-00338.1
PG 15
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 208CZ
UT WOS:000323655400005
ER
PT J
AU Martin, MC
Dabat-Blondeau, C
Unger, M
Sedlmair, J
Parkinson, DY
Bechtel, HA
Illman, B
Castro, JM
Keiluweit, M
Buschke, D
Ogle, B
Nasse, MJ
Hirschmugl, CJ
AF Martin, Michael C.
Dabat-Blondeau, Charlotte
Unger, Miriam
Sedlmair, Julia
Parkinson, Dilworth Y.
Bechtel, Hans A.
Illman, Barbara
Castro, Jonathan M.
Keiluweit, Marco
Buschke, David
Ogle, Brenda
Nasse, Michael J.
Hirschmugl, Carol J.
TI 3D spectral imaging with synchrotron Fourier transform infrared
spectro-microtomography
SO NATURE METHODS
LA English
DT Article
ID EMBRYONIC STEM-CELLS; SPATIAL-RESOLUTION PROPERTIES; FOCAL-PLANE ARRAY;
NEURONAL DIFFERENTIATION; ZINNIA-ELEGANS; RECONSTRUCTION;
SPECTROMICROSCOPY; MICROSPECTROSCOPY; TISSUE; FTIR
AB We report Fourier transform infrared spectro-microtomography, a nondestructive three-dimensional imaging approach that reveals the distribution of distinctive chemical compositions throughout an intact biological or materials sample. The method combines mid-infrared absorption contrast with computed tomographic data acquisition and reconstruction to enhance chemical and morphological localization by determining a complete infrared spectrum for every voxel (millions of spectra determined per sample).
C1 [Martin, Michael C.; Dabat-Blondeau, Charlotte; Parkinson, Dilworth Y.; Bechtel, Hans A.] Lawrence Berkeley Natl Lab, Adv Light Source Div, Berkeley, CA USA.
[Unger, Miriam; Hirschmugl, Carol J.] Univ Wisconsin, Dept Phys, Milwaukee, WI USA.
[Sedlmair, Julia; Illman, Barbara] US Dept Agr Forest Serv, Forest Prod Lab, Madison, WI USA.
[Sedlmair, Julia; Illman, Barbara] Univ Wisconsin Madison, Synchrotron Radiat Ctr, Stoughton, WI USA.
[Castro, Jonathan M.] Johannes Gutenberg Univ Mainz, Inst Geosci, D-55122 Mainz, Germany.
[Keiluweit, Marco] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA USA.
[Buschke, David; Ogle, Brenda] Univ Wisconsin, Dept Biomed Engn, Madison, WI USA.
[Nasse, Michael J.] Karlsruhe Inst Technol, Lab Applicat Synchrotron Radiat, D-76021 Karlsruhe, Germany.
RP Martin, MC (reprint author), Lawrence Berkeley Natl Lab, Adv Light Source Div, Berkeley, CA USA.
EM MCMartin@lbl.gov; cjhirsch@uwm.edu
RI Parkinson, Dilworth/A-2974-2015
OI Parkinson, Dilworth/0000-0002-1817-0716
FU US National Science Foundation [MRI-0619759, CHE-1112433]; Office of
Science, Office of Basic Energy Sciences, US Department of Energy
[DE-AC02-05CH11231]; University of Wisconsin-Madison; University of
Wisconsin-Milwaukee
FX Thanks to K. Krueger, M. Fisher and G. Rogers for outstanding machining
skills and technical support. We also thank D. Ron for assistance on the
spectral extractions. This work is based on research conducted at the
IRENI beamline, whose construction and development was supported by the
US National Science Foundation by award MRI-0619759. This work was
supported by the US National Science Foundation under grant CHE-1112433.
The ALS is supported by the Director, Office of Science, Office of Basic
Energy Sciences, US Department of Energy under contract no.
DE-AC02-05CH11231. The SRC is primarily funded by the University of
Wisconsin-Madison, with supplemental support from facility users and the
University of Wisconsin-Milwaukee.
NR 40
TC 24
Z9 24
U1 6
U2 59
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1548-7091
J9 NAT METHODS
JI Nat. Methods
PD SEP
PY 2013
VL 10
IS 9
BP 861
EP +
DI 10.1038/NMETH.2596
PG 6
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 209LX
UT WOS:000323760000021
PM 23913258
ER
PT J
AU Luther, JM
Blackburn, JL
AF Luther, Joseph M.
Blackburn, Jeffrey L.
TI OPTOELECTRONICS Plasmon-enhanced plastic devices
SO NATURE PHOTONICS
LA English
DT News Item
ID NANOPARTICLES
C1 [Luther, Joseph M.; Blackburn, Jeffrey L.] Natl Renewable Energy Lab, Chem & Mat Sci Ctr, Golden, CO 80401 USA.
RP Luther, JM (reprint author), Natl Renewable Energy Lab, Chem & Mat Sci Ctr, Golden, CO 80401 USA.
EM joey.luther@nrel.gov; jeffrey.blackburn@nrel.gov
NR 14
TC 8
Z9 8
U1 0
U2 20
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1749-4885
EI 1749-4893
J9 NAT PHOTONICS
JI Nat. Photonics
PD SEP
PY 2013
VL 7
IS 9
BP 675
EP 677
DI 10.1038/nphoton.2013.218
PG 2
WC Optics; Physics, Applied
SC Optics; Physics
GA 208XG
UT WOS:000323715000005
ER
PT J
AU Welp, U
Kadowaki, K
Kleiner, R
AF Welp, Ulrich
Kadowaki, Kazuo
Kleiner, Reinhold
TI Superconducting emitters of THz radiation
SO NATURE PHOTONICS
LA English
DT Review
ID INTRINSIC JOSEPHSON-JUNCTIONS; TRIANGULAR BI2SR2CACU2O8+DELTA MESAS;
QUANTUM-CASCADE LASERS; LAYERED SUPERCONDUCTORS; TERAHERTZ TECHNOLOGY;
FLUX-FLOW; T-C; TUNNELING SPECTROSCOPY; SINGLE-CRYSTALS; PHASE-LOCKING
AB Layered superconductors such as the copper-oxide high-temperature superconductor Bi2Sr2CaCu2O8+delta are emerging as compact sources of coherent continuous-wave electromagnetic radiation in the subterahertz and terahertz frequency ranges. The basis of their operation is the Josephson effect, which intrinsically occurs between the superconducting layers. The Josephson effect naturally converts a direct-current voltage into a high-frequency electric current. Therefore, a unique property of the devices reviewed here is the wide tunability of their frequency by varying the bias voltage. Recently, emission powers of free-space radiation of several hundreds of microwatts and emission linewidths as low as 6 MHz at 600 GHz have been achieved. These devices are promising for new applications in imaging, medical diagnostics, spectroscopy and security.
C1 [Welp, Ulrich] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
[Kadowaki, Kazuo] Univ Tsukuba, Fac Pure & Appl Sci, Div Mat Sci, Tsukuba, Ibaraki 3058573, Japan.
[Kleiner, Reinhold] Univ Tubingen, Inst Phys, D-72076 Tubingen, Germany.
[Kleiner, Reinhold] Univ Tubingen, Ctr Collect Quantum Phenomena LISA, D-72076 Tubingen, Germany.
RP Welp, U (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM welp@anl.gov
FU U.S. Department of Energy (BES); Japanese Society for the Promotion of
Science (JSPS); Japan Science and Technology Agency (JST); Deutsche
Forschungsgemeinschaft (DFG)
FX The authors thank W. K. Kwok, A. E. Koshelev, T. Benseman, B. Gross, H.
B. Wang, V. P. Koshelets, R. G. Mints, D. Koelle, T. Kashiwagi, I.
Kakeya, T. Yamamoto, R. A. Klemm, M. Tsujimoto, H. Minami and M. Tachiki
for many helpful discussions. U.W. acknowledges support from the U.S.
Department of Energy (BES), K.K. acknowledges support from the Japanese
Society for the Promotion of Science (JSPS) and the Japan Science and
Technology Agency (JST), and R.K. acknowledges support from Deutsche
Forschungsgemeinschaft (DFG).
NR 109
TC 79
Z9 82
U1 10
U2 122
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1749-4885
J9 NAT PHOTONICS
JI Nat. Photonics
PD SEP
PY 2013
VL 7
IS 9
BP 702
EP 710
DI 10.1038/NPHOTON.2013.216
PG 9
WC Optics; Physics, Applied
SC Optics; Physics
GA 208XG
UT WOS:000323715000010
ER
PT J
AU Rabin, BH
Swank, WD
Wright, RN
AF Rabin, B. H.
Swank, W. D.
Wright, R. N.
TI Thermophysical properties of Alloy 617 from 25 degrees C to 1000 degrees
C
SO NUCLEAR ENGINEERING AND DESIGN
LA English
DT Article
DE Alloy 617; Thermophysical properties; Thermal conductivity
ID BASE ALLOY; NICKEL; TEMPERATURE; HEAT
AB Key thermophysical properties needed for the successful design and use of Alloy 617 in steam generator and heat exchanger applications have been measured experimentally, and results are compared with literature values and results obtained from some other commercial Ni-Cr alloys and model materials. Specifically, the thermal diffusivity, thermal expansion coefficient, and specific heat capacity have been measured for Alloy 617 over a range of temperatures, allowing calculation of thermal conductivity up to 1000 degrees C. It has been found that the thermal conductivity of Alloy 617 exhibits significant deviation from monotonic behavior in the temperature range from 600 degrees C to 850 degrees C. the temperatures of interest for most heat transfer applications. The non-linear behavior appears to result primarily from short-range order/disorder phenomena known to occur in the Ni-Cr system. Similar deviation from monotonic behavior was observed in the solid solution Ni-Cr-W Alloy 230, and lesser deviations were observed in iron based Alloy 800H and an austenitic stainless steel. Measured thermophysical property data are provided for four different heats of Alloy 617, and it is shown that property variations between the four different heats are not significant. Measurements were also obtained from Alloy 617 that was aged for up to 2000h at 750 degrees C, and it was found that this aging treatment does not significantly influence the thermophysical properties. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Rabin, B. H.; Swank, W. D.; Wright, R. N.] Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Rabin, BH (reprint author), Idaho Natl Lab, POB 1625, Idaho Falls, ID 83415 USA.
EM barry.rabin@inl.gov
FU U.S. Department of Energy Nuclear Energy; U.S. Department of Energy
[DE-AC07-051D14517]
FX The authors would like to acknowledge D.C. Haggard for assistance in
preparing specimens and Arnie Erickson for performing density
measurements. This work was supported through the U.S. Department of
Energy Nuclear Energy. Notwithstanding the terms and conditions included
in this document, the identified paper, material, or work was or will be
authored by Battelle Energy Alliance, LLC (BEA) under and is subject to
Contract No. DE-AC07-051D14517 with the U.S. Department of Energy taking
priority. The United States Government retains, and the other entity or
entities identified in this document, by accepting the identified paper,
material, or work for publication acknowledges that the United States
Government retains, a non-exclusive, paid-up, irrevocable, world-wide
license to publish and reproduce the published form of the identified
paper, material, or work or allow others to do so, for United States
Government purposes. BEA does not make any expressed or implied
representations or warranties, including, but not limited to, with
respect to fitness for use of the identified paper, material, or work
and BEA does not indemnify the other entity or entities identified in
this document or any third parties from any and all claims, damages, or
attorney fees that may arise from the use, reproduction, or publication
of such paper, material, or work. Any and all litigation involving
entities' rights and duties under this document will be brought in a
court of competent jurisdiction in the state (or equivalent) of the
defendant's principal place of business identified in this document.
NR 18
TC 4
Z9 4
U1 0
U2 17
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0029-5493
J9 NUCL ENG DES
JI Nucl. Eng. Des.
PD SEP
PY 2013
VL 262
BP 72
EP 80
DI 10.1016/j.nucengdes.2013.03.048
PG 9
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 207HE
UT WOS:000323588700008
ER
PT J
AU Hu, R
Fanning, TH
AF Hu, Rui
Fanning, Thomas H.
TI A momentum source model for wire-wrapped rod bundles-Concept,
validation, and application
SO NUCLEAR ENGINEERING AND DESIGN
LA English
DT Article
AB Large uncertainties still exist in the treatment of wire-spacers and drag models for momentum transfer in current lumped parameter models. To improve the hydraulic modeling of wire-wrap spacers in a rod bundle, a three-dimensional momentum source model (MSM) has been developed to model the anisotropic flow without the need to resolve the geometric details of the wire-wraps. The MSM is examined for 7-pin and 37-pin bundles steady-state simulations using the commercial CFD code STAR-CCM+. The calculated steady-state inter-subchannel cross flow velocities match very well in comparisons between bare bundles with the MSM applied and the wire-wrapped bundles with explicit geometry. The validity of the model is further verified by mesh and parameter sensitivity studies. Furthermore, the MSM is applied to a 61-pin EBR-II experimental subassembly for both steady state and PLOF transient simulations. Reasonably accurate predictions of temperature, pressure, and fluid flow velocities have been achieved using the MSM for both steady-state and transient conditions. Significant computing resources are saved with the MSM since it can be used on a much coarser computational mesh. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Hu, Rui; Fanning, Thomas H.] Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA.
RP Hu, R (reprint author), Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM rhu@anl.gov
RI Hu, Rui/A-7624-2012
OI Hu, Rui/0000-0002-3771-2920
FU U.S. Department of Energy Office of Nuclear Energy's Nuclear Energy
Advanced Modeling and Simulation (NEAMS) program; U.S. Department of
Energy [DE-AC02-06CH11357]
FX This work is supported by U.S. Department of Energy Office of Nuclear
Energy's Nuclear Energy Advanced Modeling and Simulation (NEAMS)
program. The submitted manuscript has been created by UChicago Argonne,
LLC, Operator of Argonne National Laboratory ("Argonne") under contract
No. DE-AC02-06CH11357 with the U.S. Department of Energy.
NR 19
TC 1
Z9 2
U1 0
U2 4
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0029-5493
J9 NUCL ENG DES
JI Nucl. Eng. Des.
PD SEP
PY 2013
VL 262
BP 371
EP 389
DI 10.1016/j.nucengdes.2013.04.026
PG 19
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 207HE
UT WOS:000323588700035
ER
PT J
AU Bakosi, J
Christon, MA
Lowrie, RB
Pritchett-Sheats, LA
Nourgaliev, RR
AF Bakosi, J.
Christon, M. A.
Lowrie, R. B.
Pritchett-Sheats, L. A.
Nourgaliev, R. R.
TI Large-eddy simulations of turbulent flow for grid-to-rod fretting in
nuclear reactors
SO NUCLEAR ENGINEERING AND DESIGN
LA English
DT Article
ID SEMIIMPLICIT PROJECTION METHODS; VISCOUS INCOMPRESSIBLE-FLOW; CONSISTENT
MASS MATRIX; FINITE-ELEMENT METHOD; FUEL; IMPLEMENTATION
AB The grid-to-rod fretting (GTRF) problem in pressurized water reactors is a flow-induced vibration problem that results in wear and failure of the fuel rods in nuclear assemblies. In order to understand the fluid dynamics of GTRF and to build an archival database of turbulence statistics for various configurations, implicit large-eddy simulations of time-dependent single-phase turbulent flow have been performed in 3 x 3 and 5 x 5 rod bundles with a single grid spacer. To assess the computational mesh and resolution requirements, a method for quantitative assessment of unstructured meshes with no-slip walls is described. The calculations have been carried out using Hydra-TH, a thermal-hydraulics code developed at Los Alamos for the Consortium for Advanced Simulation of Light water reactors, a United States Department of Energy Innovation Hub. Hydra-TH uses a second-order implicit incremental projection method to solve the single-phase incompressible Navier Stokes equations. The simulations explicitly resolve the large scale motions of the turbulent flow field using first principles and rely on a monotonicity-preserving numerical technique to represent the unresolved scales. Each series of simulations for the 3 x 3 and 5 x 5 rod-bundle geometries is an analysis of the flow field statistics combined with a mesh-refinement study and validation with available experimental data. Our primary focus is the time history and statistics of the forces loading the fuel rods. These hydrodynamic forces are believed to be the key player resulting in rod vibration and GTRF wear, one of the leading causes for leaking nuclear fuel which costs power utilities millions of dollars in preventive measures. We demonstrate that implicit large-eddy simulation of rod-bundle flows is a viable way to calculate the excitation forces for the GTRF problem. Published by Elsevier B.V.
C1 [Bakosi, J.; Christon, M. A.; Lowrie, R. B.; Pritchett-Sheats, L. A.] Los Alamos Natl Lab, Comp Computat & Stat Sci Div, Computat Phys Grp CCS 2, Los Alamos, NM 87545 USA.
[Nourgaliev, R. R.] Idaho Natl Lab, Reactor Safety Simulat Grp, Thermal Sci & Safety Anal Dept, Idaho Falls, ID 83415 USA.
RP Bakosi, J (reprint author), Los Alamos Natl Lab, Comp Computat & Stat Sci Div, Computat Phys Grp CCS 2, POB 1663, Los Alamos, NM 87545 USA.
EM jbakosi@lanl.gov; christon@lanl.gov; lowrie@lanl.gov; lpritch@lanl.gov;
robert.nourgaliev@inl.gov
OI Bakosi, Jozsef/0000-0002-0604-5555; Lowrie, Robert/0000-0001-5537-9183
FU Consortium for Advanced Simulation of Light Water Reactors (CASL); U.S.
Department of Energy Innovation Hub
FX This research is supported by the Consortium for Advanced Simulation of
Light Water Reactors (CASL), a U.S. Department of Energy Innovation Hub.
The authors gratefully acknowledge the help in visualization and
high-performance computing issues from Ross Toedte and Ramanan Sankaran,
respectively, at Oak Ridge National Laboratory; Elvis
Dominguez-Ontiveros and Yassin Hassan at Texas A&M University for
providing the experimental data; and the help in meshing from Roger
Pawlowski and Tom Smith at Sandia National Laboratories.
NR 24
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U1 0
U2 31
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0029-5493
J9 NUCL ENG DES
JI Nucl. Eng. Des.
PD SEP
PY 2013
VL 262
BP 544
EP 561
DI 10.1016/j.nucengdes.2013.06.007
PG 18
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 207HE
UT WOS:000323588700050
ER
PT J
AU Benzi, M
Wang, Z
AF Benzi, Michele
Wang, Zhen
TI A parallel implementation of the modified augmented Lagrangian
preconditioner for the incompressible Navier-Stokes equations
SO NUMERICAL ALGORITHMS
LA English
DT Article
DE Preconditioning; Saddle point problems; Oseen problem; Krylov subspace
methods; Multicores
AB We describe a parallel implementation of a block triangular preconditioner based on the modified augmented Lagrangian approach to the steady incompressible Navier-Stokes equations. The equations are linearized by Picard iteration and discretized with various finite element and finite difference schemes on two- and three-dimensional domains. We report strong scalability results for up to 64 cores.
C1 [Benzi, Michele] Emory Univ, Dept Math & Comp Sci, Atlanta, GA 30322 USA.
[Wang, Zhen] Oak Ridge Natl Lab, Sci Comp Grp, Natl Ctr Computat Sci, Oak Ridge, TN 37831 USA.
RP Benzi, M (reprint author), Emory Univ, Dept Math & Comp Sci, Atlanta, GA 30322 USA.
EM benzi@mathcs.emory.edu; wangz@ornl.gov
FU Laney Graduate School of Arts and Science at Emory University;
Mathematical, Information, and Computational Sciences Division, Office
of Advanced Scientific Computing Research, U.S. Department of Energy
[DE-AC05-00OR22725]; UT-Battelle, LLC.; University Research Committee of
Emory University
FX M. Benzi work supported in part by a grant of the University Research
Committee of Emory University.; Z. Wang work supported in part by the
Laney Graduate School of Arts and Science at Emory University and by the
Mathematical, Information, and Computational Sciences Division, Office
of Advanced Scientific Computing Research, U.S. Department of Energy,
under Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC.
NR 19
TC 2
Z9 2
U1 0
U2 2
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1017-1398
J9 NUMER ALGORITHMS
JI Numer. Algorithms
PD SEP
PY 2013
VL 64
IS 1
BP 73
EP 84
DI 10.1007/s11075-012-9655-x
PG 12
WC Mathematics, Applied
SC Mathematics
GA 204CU
UT WOS:000323343400004
ER
PT J
AU Ringler, T
Petersen, M
Higdon, RL
Jacobsen, D
Jones, PW
Maltrud, M
AF Ringler, Todd
Petersen, Mark
Higdon, Robert L.
Jacobsen, Doug
Jones, Philip W.
Maltrud, Mathew
TI A multi-resolution approach to global ocean modeling
SO OCEAN MODELLING
LA English
DT Article
DE MPAS-Ocean; Global ocean model; Finite-volume; Multi-resolution;
Spherical Centroidal Voronoi Tesselations
ID CENTROIDAL VORONOI TESSELLATIONS; CIRCULATION MODELS;
GENERAL-CIRCULATION; CARIBBEAN SEA; FREE-SURFACE; REPRESENTATION;
SIMULATIONS; TOPOGRAPHY; TRANSPORT; PARAMETERIZATION
AB A new global ocean model (MPAS-Ocean) capable of using enhanced resolution in selected regions of the ocean domain is described and evaluated. Three simulations using different grids are presented. The first grid is a uniform high-resolution (15 km) mesh; the second grid has similarly high resolution (15 km) in the North Atlantic (NA), but coarse resolution elsewhere; the third grid is a variable resolution grid like the second but with higher resolution (7.5 km) in the NA. Simulation results are compared to observed sea-surface height (SSH), SSH variance and selected current transports. In general, the simulations produce subtropical and subpolar gyres with peak SSH amplitudes too strong by between 0.25 and 0.40 m. The mesoscale eddy activity within the NA is, in general, well simulated in both structure and amplitude. The uniform high-resolution simulation produces reasonable representations of mesoscale activity throughout the global ocean. Simulations using the second variable-resolution grid are essentially identical to the uniform case within the NA region. The third case with higher NA resolution produces a simulation that agrees somewhat better in the NA with observed SSH, SSH variance and transports than the two 15 km simulations. The actual throughput, including I/O, for the x1-15 km simulation is the same as the structured grid Parallel Ocean Program ocean model in its standard high-resolution 0.1 degrees configuration. Our overall conclusion is that this ocean model is a viable candidate for multi-resolution simulations of the global ocean system on climate-change time scales. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Ringler, Todd; Petersen, Mark; Jacobsen, Doug; Jones, Philip W.; Maltrud, Mathew] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Higdon, Robert L.] Oregon State Univ, Dept Math, Corvallis, OR 97331 USA.
RP Ringler, T (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM ringler@lanl.gov
OI Petersen, Mark/0000-0001-7170-7511
FU Office of Biological and Environmental Research within the US Department
of Energy's Office of Science; Cnes
FX This ocean model is being developed as a part of the MPAS project to
produce a shared software framework for the development of dynamical
cores. This work would not have been possible without the contributions
from the broad MPAS development team and, in particular, the
contributions of Michael Duda. The manuscript benefited from the
comments of Sergey Danilov and two anonymous reviewers. The altimeter
products were produced by Ssalto/Duacs and distributed by Aviso, with
support from Cnes (http://www.aviso.oceanobs.com/duacs/). The authors
thank Gregory Johnson for providing observational data of the Equatorial
Undercurrent. Simulations were conducted using LANL Institutional
Computing resources. This work was supported by the Earth System
Modeling and Regional and Global Climate Modeling programs of the Office
of Biological and Environmental Research within the US Department of
Energy's Office of Science.
NR 71
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U1 1
U2 21
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1463-5003
EI 1463-5011
J9 OCEAN MODEL
JI Ocean Model.
PD SEP
PY 2013
VL 69
BP 211
EP 232
DI 10.1016/j.ocemod.2013.04.010
PG 22
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 206XF
UT WOS:000323558600015
ER
PT J
AU Prantil, MA
Cormier, E
Dawson, JW
Gibson, DJ
Messerly, MJ
Barty, CPJ
AF Prantil, Matthew A.
Cormier, Eric
Dawson, Jay W.
Gibson, David J.
Messerly, Michael J.
Barty, C. P. J.
TI Widely tunable 11 GHz femtosecond fiber laser based on a nonmode-locked
source
SO OPTICS LETTERS
LA English
DT Article
ID PULSE-COMPRESSION; COMB
AB An 11 GHz fiber laser built on a modulated cw platform is described and characterized. This compact, vibration-insensitive, fiber-based system can be operated at wavelengths compatible with high-energy fiber technology, is driven by an RF signal directly, and is tunable over a wide range of drive frequencies. The demonstration system when operated at 1040 nm is capable of 50 ns bursts of 575 micropulses produced at a macropulse rate of 83 kHz where the macropulse and micropulse energies are 1.8 and 3.2 nJ, respectively. Micropulse durations of 850 fs are demonstrated. Extensions to shorter duration are discussed. (C) 2013 Optical Society of America
C1 [Prantil, Matthew A.; Dawson, Jay W.; Gibson, David J.; Messerly, Michael J.; Barty, C. P. J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
[Cormier, Eric] Univ Bordeaux, Bordeaux, France.
RP Prantil, MA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM prantil2@llnl.gov
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX This work was performed under the auspices of the U.S. Department of
Energy by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344.
NR 8
TC 1
Z9 1
U1 0
U2 11
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD SEP 1
PY 2013
VL 38
IS 17
BP 3216
EP 3218
DI 10.1364/OL.38.003216
PG 3
WC Optics
SC Optics
GA 209LJ
UT WOS:000323758000006
PM 23988917
ER
PT J
AU Kulagin, OV
Gorbunov, IA
Sergeev, AM
Valley, M
AF Kulagin, O. V.
Gorbunov, I. A.
Sergeev, A. M.
Valley, M.
TI Picosecond Raman compression laser at 1530 nm with aberration
compensation
SO OPTICS LETTERS
LA English
DT Article
ID SPHERICAL-ABERRATION; PULSE-COMPRESSION; CRYSTALS; 1.5-MU-M; RODS
AB A passively Q-switched Nd:YAG laser with a master-oscillator power-amplifier configuration based on Brillouin and Raman pulse compression has been developed. The laser operates at 100 Hz repetition rate, producing 50 mJ pulses of approximately 30 ps duration at 1530 nm wavelength with near-diffraction-limited beam quality (M-2 <= 1.2). The effect of spherical aberration in thermally loaded Nd:YAG rods was studied, and efficient aberration compensation was achieved by use of a specially designed aspheric element. (C) 2013 Optical Society of America
C1 [Kulagin, O. V.; Gorbunov, I. A.; Sergeev, A. M.] Inst Appl Phys, Nizhnii Novgorod 603950, Russia.
[Valley, M.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Kulagin, OV (reprint author), Inst Appl Phys, 46 Uljanov St, Nizhnii Novgorod 603950, Russia.
EM ok@appl.sci-nnov.ru
RI Sergeev, Alexander/F-3027-2017
FU Sandia National Laboratories [444259, 618301, 748192, 1012071, 1012097];
United States Department of Energy's National Nuclear Security
Administration [DE-AC04-94AL85000]
FX This work was supported by Sandia National Laboratories through
contracts 444259, 618301, 748192, 1012071, and 1012097. Sandia is a
multi-program laboratory operated by Sandia Corporation, a Lockheed
Martin Company, for the United States Department of Energy's National
Nuclear Security Administration under contract DE-AC04-94AL85000.
NR 21
TC 4
Z9 5
U1 0
U2 6
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD SEP 1
PY 2013
VL 38
IS 17
BP 3237
EP 3240
DI 10.1364/OL.38.003237
PG 4
WC Optics
SC Optics
GA 209LJ
UT WOS:000323758000012
PM 23988923
ER
PT J
AU Messerly, MJ
Pax, PH
Dawson, JW
AF Messerly, Michael J.
Pax, Paul H.
Dawson, Jay W.
TI Patterned flattened modes
SO OPTICS LETTERS
LA English
DT Article
ID LARGE-EFFECTIVE-AREA; FIBERS; DESIGN; LASERS; FIELD
AB We show that field-flattened strands may be added to and arbitrarily positioned within a field-flattened shell to create patterned, flattened modes. Patterning does not alter the effective index or flatness of the flattened mode but does alter the characteristics of other modes; we show that it can improve a flattened mode's bend performance significantly. Patterning provides a new and potentially valuable waveguide design tool that may lead to higher-power transport and laser fibers. (C) 2013 Optical Society of America
C1 [Messerly, Michael J.; Pax, Paul H.; Dawson, Jay W.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Messerly, MJ (reprint author), Lawrence Livermore Natl Lab, L-491,POB 808, Livermore, CA 94551 USA.
EM messerly2@LLNL.gov
FU U.S. Department of Energy by Lawrence Livermore National Laboratory
[DE-AC52-07NA27344]
FX This work was performed under the auspices of the U.S. Department of
Energy by Lawrence Livermore National Laboratory under Contract
DE-AC52-07NA27344.
NR 13
TC 0
Z9 0
U1 0
U2 5
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD SEP 1
PY 2013
VL 38
IS 17
BP 3329
EP 3332
DI 10.1364/OL.38.003329
PG 4
WC Optics
SC Optics
GA 209LJ
UT WOS:000323758000037
PM 23988948
ER
PT J
AU Gautam, ARS
Howe, JM
AF Gautam, Abhay Raj S.
Howe, James M.
TI A method to predict the orientation relationship, interface planes and
morphology between a crystalline precipitate and matrix: part II -
application
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
DE interfaces; crystalline interface; grain boundaries; orientation
relationship; interface orientation
ID PERCENT CR ALLOY; INTERPHASE BOUNDARY STRUCTURES; PHASE-TRANSFORMATIONS;
HABIT PLANE; ALPHA; CRYSTALLOGRAPHY; MARTENSITE; DEFORMATION;
NUCLEATION; ZIRCONIUM
AB A model based on near coincidence of diffraction intensity-weighted reciprocal lattice spots was used to study the orientation relationships between a precipitate and matrix in various alloys. The model was used to calculate the orientation relationship and interface orientations between phases including body-centred cubic, body-centred tetragonal, face-centred cubic and hexagonal close-packed crystals. Comparison of calculated results with those reported from various experimental observations demonstrate that in most cases the model can predict the orientation relationship between two phases with an accuracy of a few degrees or better. Calculation of the interface orientation was found to be very sensitive to the exact orientation relationship and therefore, in some cases, showed significant deviation from experimental observations.
C1 [Gautam, Abhay Raj S.; Howe, James M.] Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA.
[Gautam, Abhay Raj S.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA.
RP Gautam, ARS (reprint author), Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA.
EM arg5b@virginia.edu
FU National Science Foundation [DMR-0554792, DMR-1106230]
FX This research was supported by the National Science Foundation under
Grants DMR-0554792 and DMR-1106230.
NR 47
TC 1
Z9 1
U1 3
U2 12
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
EI 1478-6443
J9 PHILOS MAG
JI Philos. Mag.
PD SEP 1
PY 2013
VL 93
IS 25
BP 3472
EP 3490
DI 10.1080/14786435.2013.811307
PG 19
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 207WD
UT WOS:000323634500005
ER
PT J
AU Muthan, B
Roston, RL
Froehlich, JE
Benning, C
AF Muthan, Bagyalakshmi
Roston, Rebecca L.
Froehlich, John E.
Benning, Christoph
TI Probing Arabidopsis Chloroplast Diacylglycerol Pools by Selectively
Targeting Bacterial Diacylglycerol Kinase to Suborganellar Membranes
SO PLANT PHYSIOLOGY
LA English
DT Article
ID OUTER ENVELOPE MEMBRANE; PHOSPHATIDIC-ACID; ESCHERICHIA-COLI;
SN-1,2-DIACYLGLYCEROL KINASE; SPINACH-CHLOROPLASTS; LIPID TRAFFICKING;
TRANSBILAYER DIFFUSION; PRECURSOR PROTEINS; BINDING; MUTANT
AB Diacylglycerol (DAG) is an intermediate in metabolism of both triacylglycerols and membrane lipids. Probing the steady-state pools of DAG and understanding how they contribute to the synthesis of different lipids is important when designing plants with altered lipid metabolism. However, traditional methods of assaying DAG pools are difficult, because its abundance is low and because fractionation of subcellular membranes affects DAG pools. To manipulate and probe DAG pools in an in vivo context, we generated multiple stable transgenic lines of Arabidopsis (Arabidopsis thaliana) that target an Escherichia coli DAG kinase (DAGK) to each leaflet of each chloroplast envelope membrane. E. coli DAGK is small, self inserts into membranes, and has catalytic activity on only one side of each membrane. By comparing whole-tissue lipid profiles between our lines, we show that each line has an individual pattern of DAG, phosphatidic acid, phosphatidylcholine, and triacylglycerol steady-state levels, which supports an individual function of DAG in each membrane leaflet. Furthermore, conversion of DAG in the leaflets facing the chloroplast intermembrane space by DAGK impairs plant growth. As a result of DAGK presence in the outer leaflet of the outer envelope membrane, phosphatidic acid accumulation is not observed, likely because it is either converted into other lipids or removed to other membranes. Finally, we use the outer envelope-targeted DAGK line as a tool to probe the accessibility of DAG generated in response to osmotic stress.
C1 [Muthan, Bagyalakshmi; Roston, Rebecca L.; Froehlich, John E.; Benning, Christoph] Michigan State Univ, Dept Biochem & Mol Biol, E Lansing, MI 48824 USA.
[Froehlich, John E.] Michigan State Univ, US DOE, Plant Res Lab, E Lansing, MI 48824 USA.
RP Benning, C (reprint author), Michigan State Univ, Dept Biochem & Mol Biol, E Lansing, MI 48824 USA.
EM benning@msu.edu
OI Roston, Rebecca/0000-0002-3063-5002
FU Division of Chemical Sciences, Geosciences, and Biosciences, Office of
Basic Energy Sciences of the U.S. Department of Energy
[DE-FG02-98ER20305, DE-FG02-91ER20021]; Michigan AgBioResearch
FX This work was supported by the Division of Chemical Sciences,
Geosciences, and Biosciences, Office of Basic Energy Sciences of the
U.S. Department of Energy (grant nos. DE-FG02-98ER20305 to C. B. and
DE-FG02-91ER20021 to J.E.F.) and Michigan AgBioResearch (to C.B.).
NR 68
TC 6
Z9 6
U1 0
U2 13
PU AMER SOC PLANT BIOLOGISTS
PI ROCKVILLE
PA 15501 MONONA DRIVE, ROCKVILLE, MD 20855 USA
SN 0032-0889
J9 PLANT PHYSIOL
JI Plant Physiol.
PD SEP
PY 2013
VL 163
IS 1
BP 61
EP 74
DI 10.1104/pp.113.222513
PG 14
WC Plant Sciences
SC Plant Sciences
GA 209LS
UT WOS:000323759200006
PM 23839866
ER
PT J
AU Brunner, D
LaBombard, B
Churchill, RM
Hughes, J
Lipschultz, B
Ochoukov, R
Rognlien, TD
Theiler, C
Walk, J
Umansky, MV
Whyte, D
AF Brunner, D.
LaBombard, B.
Churchill, R. M.
Hughes, J.
Lipschultz, B.
Ochoukov, R.
Rognlien, T. D.
Theiler, C.
Walk, J.
Umansky, M. V.
Whyte, D.
TI An assessment of ion temperature measurements in the boundary of the
Alcator C-Mod tokamak and implications for ion fluid heat flux limiters
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID SCRAPE-OFF LAYER; RETARDING-FIELD ANALYZER; EDGE PLASMA; KATSUMATA
PROBE; H-MODE; DIVERTOR; TRANSPORT; PROFILES; SIMULATION; PARAMETERS
AB The ion temperature is not frequently measured in the boundary of magnetic fusion devices. Comparisons among different ion temperature techniques and simulations are even rarer. Here we present a comparison of ion temperature measurements in the boundary of the Alcator C-Mod tokamak from three different diagnostics: charge exchange recombination spectroscopy (CXRS), an ion sensitive probe (ISP), and a retarding field analyzer (RFA). Comparison between CXRS and the ISP along with close examination of the ISP measurements reveals that the ISP is space charge limited. It is thus unable to measure ion temperature in the high density (>10(19) m(-3)) boundary plasma of C-Mod with its present geometry. Comparison of ion temperatures measured by CXRS and the RFA shows fair agreement. Ion and electron parallel heat flow is analyzed with a simple 1D fluid code. The code takes divertor measurements as input and results are compared to the measured ratios of upstream ion to electron temperature, as inferred respectively by CXRS and a Langmuir probe. The analysis reveals the limits of the fluid model at high Knudsen number. The upstream temperature ratio is under predicted by a factor of 2. Heat flux limiters (kinetic corrections) to the fluid model are necessary to match experimental data. The values required are found to be close to those reported in kinetic simulations. The 1D code is benchmarked against the 2D plasma fluid code UEDGE with good agreement.
C1 [Brunner, D.; LaBombard, B.; Churchill, R. M.; Hughes, J.; Lipschultz, B.; Ochoukov, R.; Theiler, C.; Walk, J.; Whyte, D.] MIT, PSFC, Cambridge, MA 02139 USA.
[Rognlien, T. D.; Umansky, M. V.] LLNL, Livermore, CA 94550 USA.
RP Brunner, D (reprint author), MIT, PSFC, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
RI Lipschultz, Bruce/J-7726-2012;
OI Lipschultz, Bruce/0000-0001-5968-3684; Theiler,
Christian/0000-0003-3926-1374; Churchill, Randy/0000-0001-5711-746X
FU US DOE [DEFC02-99ER54512]
FX Thanks to the entire Alcator C-Mod Team for making these experiments
possible. Work supported by US DOE Coop. Agreement No DEFC02-99ER54512.
NR 96
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U1 3
U2 31
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD SEP
PY 2013
VL 55
IS 9
AR 095010
DI 10.1088/0741-3335/55/9/095010
PG 14
WC Physics, Fluids & Plasmas
SC Physics
GA 209QL
UT WOS:000323774400011
ER
PT J
AU Clayton, DJ
Tritz, K
Stutman, D
Bell, RE
Diallo, A
LeBlanc, BP
Podesta, M
AF Clayton, D. J.
Tritz, K.
Stutman, D.
Bell, R. E.
Diallo, A.
LeBlanc, B. P.
Podesta, M.
TI Electron temperature profile reconstructions from multi-energy SXR
measurements using neural networks
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID ATOMIC DATABASE; RADIATED POWER; TIME; JET; SPECTRA; PLASMAS; CHIANTI
AB Neural networks have been implemented to reconstruct electron temperature profiles from multi-energy soft-x-ray (ME-SXR) arrays and other plasma diagnostics with fast time resolution. On NSTX, electron temperature profiles are measured with a Thomson scattering diagnostic at 60 Hz, a speed limited by the repetition rate of the lasers. By training a neural network to match fast (>10 kHz) x-ray data with T-e profiles from Thomson scattering, the ME-SXR diagnostic can be used to produce T-e profiles with high time resolution. In particular, a new ME-SXR system will be used in conjunction with a new laser blow-off impurity injection system to measure cold pulse propagation in NSTX-U plasmas for direct, perturbative heat transport measurements. Synthetic ME-SXR data were used to optimize performance of the neural networks and study the impact of including data from various diagnostics in the networks. Initial tests on data from a previous-generation ME-SXR diagnostic on NSTX have proven successful.
C1 [Clayton, D. J.; Tritz, K.; Stutman, D.] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
[Bell, R. E.; Diallo, A.; LeBlanc, B. P.; Podesta, M.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Clayton, DJ (reprint author), Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
EM ClaytoDJ@nv.doe.gov
RI Stutman, Dan/P-4048-2015
FU United States DoE [DE-FG02-09ER55012]
FX This work was supported by the United States DoE contract number
DE-FG02-09ER55012.
NR 31
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U1 0
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD SEP
PY 2013
VL 55
IS 9
AR 095015
DI 10.1088/0741-3335/55/9/095015
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 209QL
UT WOS:000323774400016
ER
PT J
AU Lau, C
Lin, Y
Wallace, G
Wukitch, SJ
Hanson, GR
Labombard, B
Ochoukov, R
Shiraiwa, S
Terry, J
AF Lau, C.
Lin, Y.
Wallace, G.
Wukitch, S. J.
Hanson, G. R.
Labombard, B.
Ochoukov, R.
Shiraiwa, S.
Terry, J.
TI Effects of ICRF power on SOL density profiles and LH coupling during
simultaneous LH and ICRF operation on Alcator C-Mod
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID PLASMA INTERACTIONS; ION-CYCLOTRON; ANTENNAS; CONVECTION; TFTR
AB A dedicated experiment during simultaneous lower hybrid (LH) and ion cyclotron range-of-frequencies (ICRF) operations is carried out to evaluate and understand the effects of ICRF power on the scrape-off-layer (SOL) density profiles and on the resultant LH coupling for a wide range of plasma parameters on Alcator C-Mod. Operation of the LH launcher with the adjacent ICRF antenna significantly degrades LH coupling while operation with the ICRF antenna that is not magnetically connected to the LH launcher minimally affects LH coupling. An X-mode reflectometer system at three poloidal locations adjacent to the LH launcher and a visible video camera imaging the LH launcher are used to measure local SOL density profile and emissivity modifications with the application of LH and LH + ICRF power. These measurements confirm that the density in front of the LH launcher depends strongly on the magnetic field line mapping of the active ICRF antenna. Reflectometer measurements also observe both ICRF-driven and LH-driven poloidal density profile asymmetries, especially a strong density depletion at certain poloidal locations in front of the LH launcher during operation with a magnetically connected ICRF antenna. The results indicate that understanding both LH-driven flows and ICRF sheath driven flows may be necessary to understand the observed density profile modifications and LH coupling results during simultaneous LH + ICRF operation.
C1 [Lau, C.; Lin, Y.; Wallace, G.; Wukitch, S. J.; Labombard, B.; Ochoukov, R.; Shiraiwa, S.; Terry, J.] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
[Hanson, G. R.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Lau, C (reprint author), MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
EM cornwall@psfc.mit.edu
OI , Cornwall/0000-0002-8576-5867
FU MIT by US DoE [DE-AC05-00OR22725]; ORNL [DE-FC02-99ER54512]
FX This work was supported at MIT by US DoE under awards DE-AC05-00OR22725
and at ORNL by DE-FC02-99ER54512.
NR 30
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PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD SEP
PY 2013
VL 55
IS 9
AR 095003
DI 10.1088/0741-3335/55/9/095003
PG 13
WC Physics, Fluids & Plasmas
SC Physics
GA 209QL
UT WOS:000323774400004
ER
PT J
AU Tobias, B
Yu, L
Domier, CW
Luhmann, NC
Austin, ME
Paz-Soldan, C
Turnbull, AD
Classen, IGJ
AF Tobias, B.
Yu, L.
Domier, C. W.
Luhmann, N. C., Jr.
Austin, M. E.
Paz-Soldan, C.
Turnbull, A. D.
Classen, I. G. J.
CA DIII-D Team
TI Boundary perturbations coupled to core 3/2 tearing modes on the DIII-D
tokamak
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID EMISSION RADIOMETER UPGRADE; DISCHARGES; JET
AB High confinement (H-mode) discharges on the DIII-D tokamak are routinely subject to the formation of long-lived, non-disruptive magnetic islands that degrade confinement and limit fusion performance. Simultaneous, 2D measurement of electron temperature fluctuations in the core and edge regions allows for reconstruction of the radially resolved poloidal mode number spectrum and phase of the global plasma response associated with these modes. Coherent, n = 2 excursions of the plasma boundary are found to be the result of coupling to an n = 2, kink-like mode which arises locked in phase to the 3/2 island chain. This coupling dictates the relative phase of the displacement at the boundary with respect to the tearing mode. This unambiguous phase relationship, for which no counter-examples are observed, is presented as a test for modeling of the perturbed fields to be expected outside the confined plasma.
C1 [Tobias, B.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Yu, L.; Domier, C. W.; Luhmann, N. C., Jr.] Univ Calif Davis, Davis, CA 95616 USA.
[Austin, M. E.] Univ Texas Austin, Austin, TX 78712 USA.
[Paz-Soldan, C.] Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37831 USA.
[Turnbull, A. D.] Gen Atom, San Diego, CA 92186 USA.
[Classen, I. G. J.] Dutch Inst Fundamental Energy Res DIFFER, Rijnhuizen, Netherlands.
RP Tobias, B (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM bjtobias@pppl.gov
FU US DOE [DE-AC02-09CH11466, DE-FG02-99ER54531, DE-FG03-97ER54415]
FX The authors would like to thank W A Cooper, N M Ferraro, R J La Haye, S
C Jardin, E A Lazarus and A Welander for their insights in discussion of
this work. Work supported by US DOE under DE-AC02-09CH11466,
DE-FG02-99ER54531 and DE-FG03-97ER54415.
NR 37
TC 5
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U1 1
U2 9
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD SEP
PY 2013
VL 55
IS 9
AR 095006
DI 10.1088/0741-3335/55/9/095006
PG 8
WC Physics, Fluids & Plasmas
SC Physics
GA 209QL
UT WOS:000323774400007
ER
PT J
AU Anctil, A
Fthenakis, V
AF Anctil, Annick
Fthenakis, Vasilis
TI Critical metals in strategic photovoltaic technologies: abundance versus
recyclability
SO PROGRESS IN PHOTOVOLTAICS
LA English
DT Article; Proceedings Paper
CT 27th European Photovoltaic Solar Energy (EU PVSEC)
CY 2012
CL Frankfurt, GERMANY
DE photovoltaics; recycling
ID SOLAR-CELLS; EFFICIENCY; MODULES
AB Research efforts have been directed toward photovoltaic technologies using abundant base metals such as copper and zinc (e.g., CZTS or more recently CZTSSe) to overcome the material constraint challenges posed by tellurium, indium, germanium and gallium in current generation technologies (e.g., CdTe, CIGS, a-Si/thin-film Si). These materials are limited in supply because they are minor byproducts of copper, zinc, lead and aluminum production and their economic production is inherently linked to that of the base metals. On the other hand, although the base metals currently are abundant, their reserves are not inexhaustible. In addition to resource availability, the main sustainability metrics for large scales of photovoltaics growth are low cost and minimum environmental impact. As photovoltaics installations grow to greatly displace traditional power generation infrastructures, recycling will play an increasingly important role in managing their end-of-life and relieving pressure on the prices of critical materials. Identifying potential issues of current technologies can help implement take-back or recycling program ahead of time. This work explores the material recycling potential of various commercial and under development photovoltaic technologies. It sheds light on a dimension of sustainability that has not been investigated before. On the basis of entropy analyses, documented by the experience of recycling electronic products, we show that recycling of some types of photovoltaic modules that are based on abundant materials could be burdened by complexity and lack of value, creating, therefore, concerns associated with both end-of life environmental impacts and resource availability. Published 2012. This article is a U.S. Government work and is in the public domain in the USA.
C1 [Anctil, Annick; Fthenakis, Vasilis] Brookhaven Natl Lab, PV Environm Res Ctr, Upton, NY 11973 USA.
[Fthenakis, Vasilis] Columbia Univ, Ctr Life Cycle Anal, New York, NY USA.
RP Fthenakis, V (reprint author), Brookhaven Natl Lab, PV Environm Res Ctr, Upton, NY 11973 USA.
EM fthenakis@bnl.gov
OI Anctil, Annick/0000-0001-5123-0146
NR 43
TC 39
Z9 41
U1 4
U2 106
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1062-7995
EI 1099-159X
J9 PROG PHOTOVOLTAICS
JI Prog. Photovoltaics
PD SEP
PY 2013
VL 21
IS 6
SI SI
BP 1253
EP 1259
DI 10.1002/pip.2308
PG 7
WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied
SC Energy & Fuels; Materials Science; Physics
GA 203YO
UT WOS:000323331000001
ER
PT J
AU Urquhart, B
Sengupta, M
Keller, J
AF Urquhart, Bryan
Sengupta, Manajit
Keller, Jamie
TI Optimizing geographic allotment of photovoltaic capacity in a
distributed generation setting
SO PROGRESS IN PHOTOVOLTAICS
LA English
DT Article; Proceedings Paper
CT 27th European Photovoltaic Solar Energy (EU PVSEC)
CY 2012
CL Frankfurt, GERMANY
DE optimization; photovoltaics; variability; distribution; solar
ID POWER OUTPUT; PV SYSTEMS; SCALE; FLUCTUATIONS; IRRADIANCE; MODEL
AB A multi-objective optimization was performed to allocate 2MW of photovoltaic (PV) among four candidate sites on the island of Lanai, Hawaii, such that energy was maximized and variability in the form of ramp rates was minimized. This resulted in the Pareto-optimal set, an optimal solution set that provides a range of geographic allotment alternatives for fixed PV capacity. Within the Pareto-optimal set, a trade-off was found between energy produced and variability experienced, whereby a decrease in variability always necessitates a simultaneous decrease in energy. With this development, system designers have a method to select the preferred combination of energy generation and variability within the set of optimal alternatives to meet their needs. A design point within the optimal set was selected for study that decreased extreme ramp rates by more than 50% while decreasing annual energy generation by only 3% above the maximum generation allocation. To quantify the allotment mix selected, a new metric called the ramp ratio was developed. It compares ramping magnitude when all capacity is allotted to a single location to the aggregate ramping magnitude in a distributed scenario. The ramp ratio quantifies simultaneously how much more smoothing a distributed scenario would experience than single-site allotment and how much a single site is being underutilized for its ability to reduce aggregate variability. This paper creates a framework for use by cities and municipal utilities to reduce variability impacts while planning for high penetration of PV on the distribution grid, thereby maximizing the value of investments. Copyright (c) 2013 John Wiley & Sons, Ltd.
C1 [Urquhart, Bryan; Sengupta, Manajit; Keller, Jamie] Natl Renewable Energy Lab, Golden, CO 80401 USA.
[Urquhart, Bryan] Univ Calif San Diego, La Jolla, CA 92093 USA.
RP Sengupta, M (reprint author), Natl Renewable Energy Lab, 15013 Denver West Pkwy, Golden, CO 80401 USA.
EM Manajit.Sengupta@nrel.gov
NR 17
TC 6
Z9 6
U1 1
U2 12
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1062-7995
J9 PROG PHOTOVOLTAICS
JI Prog. Photovoltaics
PD SEP
PY 2013
VL 21
IS 6
SI SI
BP 1276
EP 1285
DI 10.1002/pip.2334
PG 10
WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied
SC Energy & Fuels; Materials Science; Physics
GA 203YO
UT WOS:000323331000003
ER
PT J
AU Liu, HH
Rutqvist, J
AF Liu, Hui-Hai
Rutqvist, Jonny
TI Coupled Hydro-mechanical Processes Associated with Multiphase Flow in a
Dual-continuum System: Formulations and an Application
SO ROCK MECHANICS AND ROCK ENGINEERING
LA English
DT Article
DE Hydromechanical process; Rock mechanics; Dual continuum; CO2 geological
sequestration; Numerical simulation
ID NATURALLY FRACTURED RESERVOIRS; DOUBLE-POROSITY; ROCK; MODEL;
GEOMECHANICS; DEFORMATION; SIMULATION; TRANSPORT; MEDIA
AB Fractured rock has often been conceptualized as a dual-continuum system for many practical applications. This study proposes a systematic approach to deal with multiphase flow in a dual-continuum system. Considering that fluid flow occurs in pore volumes (including fracture apertures), we first develop a so-called pore-space conservation equation for deformed fractured rock and then combine this equation with fluid mass balance to derive governing equations for multiphase flow associated with rock deformation. Constitutive relationships are also presented for describing stress dependence of hydraulic properties and effective mechanical parameters for bulk rock body (as a function of the corresponding parameters for fracture and matrix continua). Finally, we applied the developed approach to a CO2 geological sequestration problem to demonstrate the usefulness of the approach.
C1 [Liu, Hui-Hai; Rutqvist, Jonny] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Liu, HH (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
EM hhliu@lbl.gov
RI Rutqvist, Jonny/F-4957-2015
OI Rutqvist, Jonny/0000-0002-7949-9785
FU Office of Sequestration, Hydrogen, and Clean Coal Fuels of the US
Department of Energy [DE-AC02-05CH11231]
FX We thank Drs. Jonathan Ajo-Franklin and Daniel Hawkes at LBNL for
reviewing the initial version of the paper and In Salah Gas Project for
providing data sets related to CO2 sequestration activities
at the In Salah site. Constructive comments from Prof. Herbert Einstein
and anonymous reviewers are appreciated. This work was supported by the
Assistant Secretary for Fossil Energy, Office of Sequestration,
Hydrogen, and Clean Coal Fuels of the US Department of Energy under
Contract No. DE-AC02-05CH11231. Especially, we like to acknowledge In
Salah JIP and their partners BP, StatoiHydro, and Sonatrach for
providing field data and valuable discussions.
NR 31
TC 5
Z9 6
U1 1
U2 34
PU SPRINGER WIEN
PI WIEN
PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 WIEN, AUSTRIA
SN 0723-2632
J9 ROCK MECH ROCK ENG
JI Rock Mech. Rock Eng.
PD SEP
PY 2013
VL 46
IS 5
BP 1103
EP 1112
DI 10.1007/s00603-012-0313-3
PG 10
WC Engineering, Geological; Geosciences, Multidisciplinary
SC Engineering; Geology
GA 208IC
UT WOS:000323670300012
ER
PT J
AU Kim, HM
Rutqvist, J
Jeong, JH
Choi, BH
Ryu, DW
Song, WK
AF Kim, Hyung-Mok
Rutqvist, Jonny
Jeong, Ju-Hwan
Choi, Byung-Hee
Ryu, Dong-Woo
Song, Won-Kyong
TI Characterizing Excavation Damaged Zone and Stability of Pressurized
Lined Rock Caverns for Underground Compressed Air Energy Storage
SO ROCK MECHANICS AND ROCK ENGINEERING
LA English
DT Article
DE Excavation damaged zone (EDZ); Compliance; Lined rock cavern (LRC);
Compressed air energy storage (CAES); TOUGH-FLAC simulator
ID FRACTURED ROCK; DISTURBED ZONE; PERFORMANCE; PERMEABILITY; REPOSITORY;
MINE; CLAY
AB In this paper, we investigate the influence of the excavation damaged zone (EDZ) on the geomechanical performance of compressed air energy storage (CAES) in lined rock caverns. We conducted a detailed characterization of the EDZ in rock caverns that have been excavated for a Korean pilot test program on CAES in (concrete) lined rock caverns at shallow depth. The EDZ was characterized by measurements of P- and S-wave velocities and permeability across the EDZ and into undisturbed host rock. Moreover, we constructed an in situ concrete lining model and conducted permeability measurements in boreholes penetrating the concrete, through the EDZ and into the undisturbed host rock. Using the site-specific conditions and the results of the EDZ characterization, we carried out a model simulation to investigate the influence of the EDZ on the CAES performance, in particular related to geomechanical responses and stability. We used a modeling approach including coupled thermodynamic multiphase flow and geomechanics, which was proven to be useful in previous generic CAES studies. Our modeling results showed that the potential for inducing tensile fractures and air leakage through the concrete lining could be substantially reduced if the EDZ around the cavern could be minimized. Moreover, the results showed that the most favorable design for reducing the potential for tensile failure in the lining would be a relatively compliant concrete lining with a tight inner seal, and a relatively stiff (uncompliant) host rock with a minimized EDZ. Because EDZ compliance depends on its compressibility (or modulus) and thickness, care should be taken during drill and blast operations to minimize the damage to the cavern walls.
C1 [Kim, Hyung-Mok] Sejong Univ, Energy & Mineral Resources Engn, Seoul 143747, South Korea.
[Rutqvist, Jonny] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Jeong, Ju-Hwan] Minist Knowledge Econ, South Mine Secur Off, Hwasun 519805, South Korea.
[Choi, Byung-Hee; Ryu, Dong-Woo; Song, Won-Kyong] Korea Inst Geosci & Mineral Resources KIGAM, Taejon 305350, South Korea.
RP Ryu, DW (reprint author), Korea Inst Geosci & Mineral Resources KIGAM, Taejon 305350, South Korea.
EM dwryu@kigam.re.kr
RI Rutqvist, Jonny/F-4957-2015;
OI Rutqvist, Jonny/0000-0002-7949-9785; Ryu, Dongwoo/0000-0002-4556-9669
FU Basic Research Project of the Korea Institute of Geoscience and Mineral
Resources (KIGAM) [GP2012-001]; Ministry of Knowledge Economy of Korea;
KIGAM; US Department of Energy [DE-AC02-05CH11231]
FX This research was supported by the Basic Research Project of the Korea
Institute of Geoscience and Mineral Resources (KIGAM, GP2012-001),
funded by the Ministry of Knowledge Economy of Korea, and funding from
KIGAM for Dr. Jonny Rutqvist and Berkeley Lab was provided through the
US Department of Energy Contract No. DE-AC02-05CH11231. Editorial review
by Dan Hawkes at Berkeley Lab is greatly appreciated.
NR 28
TC 7
Z9 8
U1 1
U2 34
PU SPRINGER WIEN
PI WIEN
PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 WIEN, AUSTRIA
SN 0723-2632
J9 ROCK MECH ROCK ENG
JI Rock Mech. Rock Eng.
PD SEP
PY 2013
VL 46
IS 5
BP 1113
EP 1124
DI 10.1007/s00603-012-0312-4
PG 12
WC Engineering, Geological; Geosciences, Multidisciplinary
SC Engineering; Geology
GA 208IC
UT WOS:000323670300013
ER
PT J
AU Crowell, SR
Sharma, AK
Amin, S
Soelberg, JJ
Sadler, NC
Wright, AT
Baird, WM
Williams, DE
Corley, RA
AF Crowell, Susan Ritger
Sharma, Arun K.
Amin, Shantu
Soelberg, Jolen J.
Sadler, Natalie C.
Wright, Aaron T.
Baird, William M.
Williams, David E.
Corley, Richard A.
TI Impact of Pregnancy on the Pharmacokinetics of Dibenzo[def,p]chrysene in
Mice
SO TOXICOLOGICAL SCIENCES
LA English
DT Article
DE PBPK modeling; dibenzo[def; p]chrysene; polycyclic aromatic
hydrocarbons; pregnancy; gestation
ID TUMOR-INITIATING ACTIVITY; TANDEM MASS-SPECTRA; RAT MAMMARY-GLAND; MOUSE
SKIN; IN-VIVO; TRANSPLACENTAL CARCINOGENESIS; ULTIMATE CARCINOGENS;
ACCURATE MASS; CYTOCHROME-P450; MODELS
AB Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants generated during combustion. Dibenzo[def,p]chrysene (DBC) is a high molecular weight PAH classified as a 2B carcinogen by the International Agency for Research on Cancer. DBC crosses the placenta in exposed mice, causing carcinogenicity in offspring. We present pharmacokinetic data of DBC in pregnant and nonpregnant mice. Pregnant (gestational day 17) and nonpregnant female B6129SF1/J mice were exposed to 15mg/kg DBC by oral gavage. Subgroups of mice were sacrificed up to 48h postdosing, and blood, excreta, and tissues were analyzed for DBC and its major diol and tetrol metabolites. Elevated maximum concentrations and areas under the curve of DBC and its metabolites were observed in blood and tissues of pregnant animals compared with nave mice. Using a physiologically based pharmacokinetic (PBPK) model, we found observed differences in pharmacokinetics could not be attributed solely to changes in tissue volumes and blood flows that occur during pregnancy. Measurement of enzyme activity in nave and pregnant mice by activity-based protein profiling indicated a 2- to 10-fold reduction in activities of many of the enzymes relevant to PAH metabolism. Incorporating this reduction into the PBPK model improved model predictions. Concentrations of DBC in fetuses were one to two orders of magnitude below maternal blood concentrations, whereas metabolite concentrations closely resembled those observed in maternal blood.
C1 [Crowell, Susan Ritger; Soelberg, Jolen J.; Sadler, Natalie C.; Wright, Aaron T.; Corley, Richard A.] Pacific NW Natl Lab, Fundamental & Computat Sci Directorate, Richland, WA 99352 USA.
[Sharma, Arun K.; Amin, Shantu] Penn State Univ, Coll Med, Dept Pharmacol, Hershey, PA 17033 USA.
[Wright, Aaron T.; Baird, William M.] Oregon State Univ, Dept Environm & Mol Toxicol, Corvallis, OR 97331 USA.
RP Crowell, SR (reprint author), Syst Toxicol, 902 Battelle Blvd, Richland, WA 99352 USA.
EM susan.crowell@pnnl.gov
OI Wright, Aaron/0000-0002-3172-5253
FU National Institute of Environmental Health Sciences [P42 ES016465];
National Institute of General Medical Sciences [8P41GM103493-10]; United
States Department of Energy Laboratory Directed Research and Development
Project [90001]
FX National Institute of Environmental Health Sciences (P42 ES016465),
National Institute of General Medical Sciences (8P41GM103493-10), United
States Department of Energy Laboratory Directed Research and Development
Project 90001.
NR 46
TC 8
Z9 8
U1 1
U2 23
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 1096-6080
J9 TOXICOL SCI
JI Toxicol. Sci.
PD SEP
PY 2013
VL 135
IS 1
BP 48
EP 62
DI 10.1093/toxsci/kft124
PG 15
WC Toxicology
SC Toxicology
GA 207SQ
UT WOS:000323624500005
PM 23744095
ER
PT J
AU Liu, HH
Valocchi, AJ
Kang, QJ
Werth, C
AF Liu, Haihu
Valocchi, Albert J.
Kang, Qinjun
Werth, Charles
TI Pore-Scale Simulations of Gas Displacing Liquid in a Homogeneous Pore
Network Using the Lattice Boltzmann Method
SO TRANSPORT IN POROUS MEDIA
LA English
DT Article
DE Pore-scale simulations; Fingering; Porous media; Multiphase flows;
Lattice Boltzmann
ID INCOMPRESSIBLE 2-PHASE FLOWS; LEVEL SET METHOD; POROUS-MEDIA; IMMISCIBLE
DISPLACEMENT; RELATIVE PERMEABILITY; INVASION PERCOLATION;
LINEAR-STABILITY; MULTIPHASE FLOWS; FLUID INTERFACE; DENSITY RATIOS
AB A lattice Boltzmann high-density-ratio model, which uses diffuse interface theory to describe the interfacial dynamics and was proposed originally by Lee and Liu (J Comput Phys 229:8045-8063, 2010), is extended to simulate immiscible multiphase flows in porous media. A wetting boundary treatment is proposed for concave and convex corners. The capability and accuracy of this model is first validated by simulations of equilibrium contact angle, injection of a non-wetting gas into two parallel capillary tubes, and dynamic capillary intrusion. The model is then used to simulate gas displacement of liquid in a homogenous two-dimensional pore network consisting of uniformly spaced square obstructions. The influence of capillary number (Ca), viscosity ratio (), surface wettability, and Bond number (Bo) is studied systematically. In the drainage displacement, we have identified three different regimes, namely stable displacement, capillary fingering, and viscous fingering, all of which are strongly dependent upon the capillary number, viscosity ratio, and Bond number. Gas saturation generally increases with an increase in capillary number at breakthrough, whereas a slight decrease occurs when Ca is increased from to , which is associated with the viscous instability at high Ca. Increasing the viscosity ratio can enhance stability during displacement, leading to an increase in gas saturation. In the two-dimensional phase diagram, our results show that the viscous fingering regime occupies a zone markedly different from those obtained in previous numerical and experimental studies. When the surface wettability is taken into account, the residual liquid blob decreases in size with the affinity of the displacing gas to the solid surface. Increasing Bo can increase the gas saturation, and stable displacement is observed for because the applied gravity has a stabilizing influence on the drainage process.
C1 [Liu, Haihu; Valocchi, Albert J.; Werth, Charles] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA.
[Kang, Qinjun] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
RP Liu, HH (reprint author), Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA.
EM haihuliu@illinois.edu
RI Liu, Haihu/B-2097-2013; Kang, Qinjun/A-2585-2010
OI Liu, Haihu/0000-0002-0295-1251; Kang, Qinjun/0000-0002-4754-2240
FU LDRD Program of the Los Alamos National Laboratory [20100025DR];
International Institute for Carbon Neutral Energy Research (WPI-I2CNER);
Japanese Ministry of Education, Culture, Sports, Science and Technology
FX The authors gratefully acknowledge the support of the LDRD Program (No.
20100025DR) of the Los Alamos National Laboratory, and the International
Institute for Carbon Neutral Energy Research (WPI-I2CNER), sponsored by
the Japanese Ministry of Education, Culture, Sports, Science and
Technology. The authors would like to thank Dr. A. Hunt, Dr. R. P.
Ewing, and two anonymous referees for many valuable comments and
suggestions.
NR 95
TC 26
Z9 26
U1 4
U2 73
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0169-3913
J9 TRANSPORT POROUS MED
JI Transp. Porous Media
PD SEP
PY 2013
VL 99
IS 3
BP 555
EP 580
DI 10.1007/s11242-013-0200-8
PG 26
WC Engineering, Chemical
SC Engineering
GA 206HA
UT WOS:000323508300007
ER
PT J
AU Rangarajan, D
Curtis, JS
Benyahia, S
Mychkovsky, AG
AF Rangarajan, Deepak
Curtis, Jennifer S.
Benyahia, Sofiane
Mychkovsky, Alexander G.
TI Continuum model validation of gas jet plume injection into a gas-solid
bubbling fluidized bed
SO AICHE JOURNAL
LA English
DT Article
DE multiphase flows for interphase exchanges; Eulerian-Eulerian modeling;
continuum gas-solid modeling
ID PHASE-VELOCITY PROFILES; NUMERICAL-SIMULATION; SPOUTED BED; LDV
MEASUREMENTS; HYDRODYNAMIC MODELS; GRANULAR-MATERIALS; PARTICLE FLOWS;
CFD MODELS; PENETRATION; DILUTE
AB A continuum gas-solid model that includes descriptions for solid frictional stress and a turbulent gas phase is evaluated against published experimental measurements of mean and fluctuating velocity inside the jet plume region of a bubbling fluidized bed with a high-speed vertical jet injection. The main uncertainties in closure relations necessary in the continuum model are first identified and then determined using available experimental data. The overall model shows good agreement with both the gas and particle experimental velocity profiles. The trends in the centerline mean and fluctuating velocity with change in the fluidized state of the emulsion are also captured favorably. Main deviations between the model and experiment are noted and possible reasons for the mismatch are discussed. (c) 2013 American Institute of Chemical Engineers AIChE J, 59: 3247-3264, 2013
C1 [Rangarajan, Deepak; Curtis, Jennifer S.] Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA.
[Benyahia, Sofiane] Natl Energy Technol Lab, Morgantown, WV 26505 USA.
[Mychkovsky, Alexander G.] Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA.
RP Rangarajan, D (reprint author), Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA.
EM deepakrangarajan@ufl.edu
FU Department of Energy's Office of Fossil Energy's University Research
Program [DE-NT0007649]
FX The funding for this work was sponsored by the Department of Energy's
Office of Fossil Energy's University Research Program under project
number DE-NT0007649. The authors acknowledge the University of Florida
High-Performance Computing Center for providing computational resources
and support that have contributed to the research results reported
within this article (URL: http://hpc.ufl.edu).
NR 58
TC 1
Z9 2
U1 6
U2 37
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0001-1541
J9 AICHE J
JI AICHE J.
PD SEP
PY 2013
VL 59
IS 9
BP 3247
EP 3264
DI 10.1002/aic.14018
PG 18
WC Engineering, Chemical
SC Engineering
GA 201NU
UT WOS:000323149100012
ER
PT J
AU D'Ettorre, G
Lo Presti, A
Gori, C
Cella, E
Bertoli, A
Vullo, V
Perno, CF
Ciotti, M
Foley, BT
Ciccozzi, M
AF D'Ettorre, Gabriella
Lo Presti, Alessandra
Gori, Caterina
Cella, Eleonora
Bertoli, Ada
Vullo, Vincenzo
Perno, Carlo Federico
Ciotti, Marco
Foley, Brian T.
Ciccozzi, Massimo
CA HIV-2 Study Grp
TI An HIV Type 2 Case Series in Italy: A Phylogenetic Analysis
SO AIDS RESEARCH AND HUMAN RETROVIRUSES
LA English
DT Article
ID IMMUNODEFICIENCY-VIRUS TYPE-2; WEST-AFRICA; GUINEA-BISSAU; INFECTION;
EPIDEMIOLOGY; AIDS; PREVALENCE; RETROVIRUS; DIAGNOSES; PORTUGAL
AB In recent years, the increase of migration from countries where human immunodeficiency virus type 2 (HIV-2) is endemic to industrialized countries has facilitated the spread of the virus in individuals previously unexposed to this threat. In this report, we performed a phylogenetic analysis on pol and env sequences of HIV-2 strains identified in foreigners and native citizens to trace the origin of infection. All but one of the 17 pol gene sequences were classified as group A. HIV-2 strains were aggregated in several clusters depending by the country of origin and/or infection. One patient (1AA) was classified as being infected with a recombinant between HIV-2 group A and HIV-2 group B, because the pol gene sequence was clearly in the group A, but an env V3 region sequence from this patient was more similar to group B viruses. Therefore, it is urgent to strengthen the surveillance and use adequate molecular virological tools to diagnose and monitor HIV-2 infection.
C1 [D'Ettorre, Gabriella; Vullo, Vincenzo] Univ Roma La Sapienza, Dept Publ Hlth & Infect Dis, I-00185 Rome, Italy.
[Lo Presti, Alessandra; Cella, Eleonora; Ciccozzi, Massimo] Ist Super Sanita, Dept Infect Dis, I-00161 Rome, Italy.
[Gori, Caterina] INMI L Spallanzani, Rome, Italy.
[Bertoli, Ada; Perno, Carlo Federico] Univ Roma Tor Vergata, Dept Expt Med & Surg, Rome, Italy.
[Ciotti, Marco] Fdn Polyclin Tor Vergata, Mol Virol Lab, Rome, Italy.
[Foley, Brian T.] Los Alamos Natl Lab, Theoret Biol Div, Los Alamos, NM USA.
RP Ciccozzi, M (reprint author), Ist Super Sanita, Dept Infect Dis, Viale Regina Elena 299, I-00161 Rome, Italy.
EM ciccozzi@iss.it
RI perno, carlo federico/O-1544-2016; d'Ettorre, Gabriella/K-4511-2016;
Cella, Eleonora/J-9961-2016; Lo Presti, Alessandra/K-1451-2016;
CICCOZZI, MASSIMO/C-6484-2016; Ceccarelli, Giancarlo/K-6454-2016
OI d'Ettorre, Gabriella/0000-0002-3571-5677; gori,
caterina/0000-0002-6042-7570; Cavallari, Eugenio
Nelson/0000-0002-6021-484X; BERTOLI, ADA/0000-0003-0663-2503; Foley,
Brian/0000-0002-1086-0296; Cella, Eleonora/0000-0002-7870-9744; Lo
Presti, Alessandra/0000-0001-7611-5021; CICCOZZI,
MASSIMO/0000-0003-3866-9239; Ceccarelli, Giancarlo/0000-0001-5921-3180
NR 25
TC 1
Z9 1
U1 1
U2 11
PU MARY ANN LIEBERT, INC
PI NEW ROCHELLE
PA 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA
SN 0889-2229
J9 AIDS RES HUM RETROV
JI Aids Res. Hum. Retrovir.
PD SEP
PY 2013
VL 29
IS 9
BP 1254
EP 1259
DI 10.1089/aid.2013.0091
PG 6
WC Immunology; Infectious Diseases; Virology
SC Immunology; Infectious Diseases; Virology
GA 204NL
UT WOS:000323372600012
PM 23638670
ER
PT J
AU Wissel, SA
Zwicker, A
Ross, J
Gershman, S
AF Wissel, Stephanie A.
Zwicker, Andrew
Ross, Jerry
Gershman, Sophia
TI The use of dc glow discharges as undergraduate educational tools
SO AMERICAN JOURNAL OF PHYSICS
LA English
DT Article
ID PLASMA PHYSICS; LABORATORY COURSE; SPECTROSCOPY
AB Plasmas have a beguiling way of getting students interested in physics. We argue that plasmas can and should be incorporated into the undergraduate curriculum as both demonstrations and advanced investigations of electromagnetism and quantum effects. We describe a device, based on a direct-current (dc) glow discharge tube, which allows for a number of experiments into topics such as electrical breakdown, spectroscopy, magnetism, and electron temperature. (C) 2013 American Association of Physics Teachers.
C1 [Wissel, Stephanie A.; Zwicker, Andrew] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
[Ross, Jerry] Shawnee State Univ, Portsmouth, OH 45662 USA.
[Gershman, Sophia] Adv Res Innovat Sci Educ ARISE, Scotch Plains, NJ 07076 USA.
RP Wissel, SA (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA.
EM swissel@physics.ucla.edu; azwicker@pppl.gov
NR 24
TC 1
Z9 1
U1 3
U2 6
PU AMER ASSOC PHYSICS TEACHERS AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0002-9505
J9 AM J PHYS
JI Am. J. Phys.
PD SEP
PY 2013
VL 81
IS 9
BP 663
EP 669
DI 10.1119/1.4811435
PG 7
WC Education, Scientific Disciplines; Physics, Multidisciplinary
SC Education & Educational Research; Physics
GA 203GS
UT WOS:000323280600005
ER
PT J
AU Lindley, MC
Lorick, SA
Geevarughese, A
Lee, SJ
Makvandi, M
Miller, BL
Nace, DA
Smith, C
Ahmed, F
AF Lindley, Megan C.
Lorick, Suchita A.
Geevarughese, Anita
Lee, Soo-Jeong
Makvandi, Monear
Miller, Brady L.
Nace, David A.
Smith, Carmela
Ahmed, Faruque
TI Evaluating a Standardized Measure of Healthcare Personnel Influenza
Vaccination
SO AMERICAN JOURNAL OF PREVENTIVE MEDICINE
LA English
DT Article
ID LONG-TERM-CARE; RANDOMIZED CONTROLLED-TRIAL; NOSOCOMIAL INFLUENZA;
ELDERLY-PEOPLE; HOME STAFF; WORKERS; MORTALITY; RESIDENTS; OUTBREAK;
RATES
AB Background: Methods of measuring influenza vaccination of healthcare personnel (HCP) vary substantially, as do the groups of HCP that are included in any given set of measurements. Thus, comparison of vaccination rates across healthcare facilities is difficult.
Purpose: The goal of the study was to determine the feasibility of implementing a standardized measure for reporting HCP influenza vaccination data in various types of healthcare facilities.
Methods: A total of 318 facilities recruited in four U.S. jurisdictions agreed to participate in the evaluation, including hospitals, long-term care facilities, dialysis clinics, ambulatory surgery centers, and physician practices. HCP in participating facilities were categorized as employees, credentialed non-employees, or other non-employees using standard definitions. Data were gathered using cross-sectional web-based surveys completed at three intervals between October 2010 and May 2011; data were analyzed in February 2012.
Results: 234 facilities (74%) completed all three surveys. Most facilities could report on-site employee vaccination; almost one third could not provide complete data on HCP vaccinated outside the facility, contraindications, or declinations, primarily due to missing non-employee data. Inability to determine vaccination status of credentialed and other non-employees was cited as a major barrier to measure implementation by 24% and 27% of respondents, respectively.
Conclusions: Using the measure to report employee vaccination status was feasible for most facilities; tracking non-employee HCP was more challenging. Based on evaluation findings, the measure was revised to limit the types of non-employees included. Although the revised measure is less comprehensive, it is more likely to produce valid vaccination coverage estimates. Use of this standardized measure can inform quality improvement efforts and facilitate comparison of HCP influenza vaccination among facilities. Published by Elsevier Inc. on behalf of American Journal of Preventive Medicine
C1 [Lindley, Megan C.; Lorick, Suchita A.; Ahmed, Faruque] CDC, Natl Ctr Immunizat & Resp Dis, Atlanta, GA 30333 USA.
[Geevarughese, Anita] New York City Dept Hlth & Mental Hyg, Bur Immunizat, New York, NY USA.
[Lee, Soo-Jeong] Univ Calif San Francisco, Sch Nursing, San Francisco, CA 94143 USA.
[Makvandi, Monear] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Miller, Brady L.] Univ Michigan, Sch Med, Ann Arbor, MI USA.
[Nace, David A.] Univ Pittsburgh, Div Geriatr Med, Pittsburgh, PA USA.
RP Lindley, MC (reprint author), Natl Ctr Immunizat & Resp Dis, 1600 Clifton Rd NE,Mailstop A-19, Atlanta, GA 30333 USA.
EM MLindley@cdc.gov
RI Nace, David/D-2638-2014
FU CDC
FX This work was supported by the CDC.
NR 40
TC 2
Z9 2
U1 0
U2 4
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0749-3797
J9 AM J PREV MED
JI Am. J. Prev. Med.
PD SEP
PY 2013
VL 45
IS 3
BP 297
EP 303
DI 10.1016/j.amepre.2013.04.019
PG 7
WC Public, Environmental & Occupational Health; Medicine, General &
Internal
SC Public, Environmental & Occupational Health; General & Internal Medicine
GA 202CU
UT WOS:000323191900007
PM 23953356
ER
PT J
AU Banerjee, A
Kaplan, JB
Soherwardy, A
Nudell, Y
Mackenzie, GA
Johnson, S
Balashova, NV
AF Banerjee, Anushree
Kaplan, Jeffrey B.
Soherwardy, Amenah
Nudell, Yoav
Mackenzie, Grace A.
Johnson, Shannon
Balashova, Nataliya V.
TI Characterization of TEM-1 beta-Lactamase-Producing Kingella kingae
Clinical Isolates
SO ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
LA English
DT Article
ID POLYMERASE-CHAIN-REACTION; SKELETAL SYSTEM INFECTIONS;
NEISSERIA-GONORRHOEAE; OSTEOARTICULAR INFECTIONS; SEPTIC ARTHRITIS;
ACTINOBACILLUS-ACTINOMYCETEMCOMITANS; ANTIBIOTIC SUSCEPTIBILITY;
MENINGOCOCCAL PORB; EMERGING PATHOGEN; ESCHERICHIA-COLI
AB Kingella kingae is a human pathogen that causes pediatric osteoarticular infections and infective endocarditis in children and adults. The bacterium is usually susceptible to beta-lactam antibiotics, although beta-lactam resistance has been reported in rare isolates. This study was conducted to identify beta-lactam-resistant strains and to characterize the resistance mechanism. Screening of a set of 90 K. kingae clinical isolates obtained from different geographic locations revealed high-level resistance to penicillins among 25% of the strains isolated from Minnesota and Iceland. These strains produced TEM-1 beta-lactamase and were shown to contain additional >= 50-kb plasmids. Ion Torrent sequencing of extrachromosomal DNA from a beta-lactamase-producing strain confirmed the plasmid location of the bla(TEM) gene. An identical plasmid pattern was demonstrated by multiplex PCR in all beta-lactamase producers. The porin gene's fragments were analyzed to investigate the relatedness of bacterial strains. Phylogenetic analysis revealed 27 single-nucleotide polymorphisms (SNPs) in the por gene fragment, resulting in two major clusters with 11 allele types forming bacterial-strain subclusters. beta-Lactamase producers were grouped together based on por genotyping. Our results suggest that the beta-lactamase-producing strains likely originate from a single plasmid-bearing K. kingae isolate that traveled from Europe to the United States, or vice versa. This study highlights the prevalence of penicillin resistance among K. kingae strains in some regions and emphasizes the importance of surveillance for antibiotic resistance of the pathogen.
C1 [Banerjee, Anushree; Soherwardy, Amenah; Nudell, Yoav; Mackenzie, Grace A.; Balashova, Nataliya V.] Univ Med & Dent New Jersey, New Jersey Dent Sch, Dept Oral Biol, Newark, NJ 07103 USA.
[Kaplan, Jeffrey B.] American Univ, Dept Biol, Washington, DC 20016 USA.
[Johnson, Shannon] Los Alamos Natl Lab, Genome Biol Grp, Los Alamos, NM USA.
RP Balashova, NV (reprint author), Univ Med & Dent New Jersey, New Jersey Dent Sch, Dept Oral Biol, Newark, NJ 07103 USA.
EM balashnv@umdnj.edu
FU NIH [AI82392, AI80844]; American Heart Association [9SDG2310194]
FX This work was supported in part by NIH grants AI82392 (to J.B.K.) and
AI80844 (to N.V.B.) and by American Heart Association grant 9SDG2310194
(to N.V.B.).
NR 54
TC 8
Z9 8
U1 0
U2 10
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0066-4804
EI 1098-6596
J9 ANTIMICROB AGENTS CH
JI Antimicrob. Agents Chemother.
PD SEP
PY 2013
VL 57
IS 9
BP 4300
EP 4306
DI 10.1128/AAC.00318-13
PG 7
WC Microbiology; Pharmacology & Pharmacy
SC Microbiology; Pharmacology & Pharmacy
GA 203IL
UT WOS:000323285500026
PM 23796935
ER
PT J
AU Schaefer, AL
Lappala, CR
Morlen, RP
Pelletier, DA
Lu, TYS
Lankford, PK
Harwood, CS
Greenberg, EP
AF Schaefer, Amy L.
Lappala, Colin R.
Morlen, Ryan P.
Pelletier, Dale A.
Lu, Tse-Yuan S.
Lankford, Patricia K.
Harwood, Caroline S.
Greenberg, E. Peter
TI LuxR- and LuxI-Type Quorum-Sensing Circuits Are Prevalent in Members of
the Populus deltoides Microbiome
SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID HOMOSERINE LACTONE; PSEUDOMONAS-AERUGINOSA; RHIZOBIUM-LEGUMINOSARUM;
SINORHIZOBIUM-MELILOTI; VIRULENCE; RHIZOSPHERE; HOMOLOG; GENES;
MOLECULES; BACTERIA
AB We are interested in the root microbiome of the fast-growing Eastern cottonwood tree, Populus deltoides. There is a large bank of bacterial isolates from P. deltoides, and there are 44 draft genomes of bacterial endophyte and rhizosphere isolates. As a first step in efforts to understand the roles of bacterial communication and plant-bacterial signaling in P. deltoides, we focused on the prevalence of acyl-homoserine lactone (AHL) quorum-sensing-signal production and reception in members of the P. deltoides microbiome. We screened 129 bacterial isolates for AHL production using a broad-spectrum bioassay that responds to many but not all AHLs, and we queried the available genome sequences of microbiome isolates for homologs of AHL synthase and receptor genes. AHL signal production was detected in 40% of 129 strains tested. Positive isolates included members of the Alpha-, Beta-, and Gammaproteobacteria. Members of the luxI family of AHL synthases were identified in 18 of 39 proteobacterial genomes, including genomes of some isolates that tested negative in the bioassay. Members of the luxR family of transcription factors, which includes AHL-responsive factors, were more abundant than luxI homologs. There were 72 in the 39 proteobacterial genomes. Some of the luxR homologs appear to be members of a subfamily of LuxRs that respond to as-yet-unknown plant signals rather than bacterial AHLs. Apparently, there is a substantial capacity for AHL cell-to-cell communication in proteobacteria of the P. deltoides microbiota, and there are also Proteobacteria with LuxR homologs of the type hypothesized to respond to plant signals or cues.
C1 [Schaefer, Amy L.; Lappala, Colin R.; Morlen, Ryan P.; Harwood, Caroline S.; Greenberg, E. Peter] Univ Washington, Dept Microbiol, Seattle, WA 98195 USA.
[Pelletier, Dale A.; Lu, Tse-Yuan S.; Lankford, Patricia K.] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN USA.
RP Greenberg, EP (reprint author), Univ Washington, Dept Microbiol, Seattle, WA 98195 USA.
EM epgreen@uw.edu
FU Genomic Science Program, U.S. Department of Energy, Office of Science,
Biological and Environmental Research, Plant Microbe Interfaces
Scientific Focus Area; U.S. Department of Energy [DE-AC05-00OR22725]
FX This research was sponsored by the Genomic Science Program, U.S.
Department of Energy, Office of Science, Biological and Environmental
Research, as part of the Plant Microbe Interfaces Scientific Focus Area
(http://pmi.ornl.gov). Oak Ridge National Laboratory is managed by
UT-Battelle LLC for the U.S. Department of Energy under contract
DE-AC05-00OR22725.
NR 43
TC 9
Z9 9
U1 2
U2 48
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0099-2240
J9 APPL ENVIRON MICROB
JI Appl. Environ. Microbiol.
PD SEP
PY 2013
VL 79
IS 18
BP 5745
EP 5752
DI 10.1128/AEM.01417-13
PG 8
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 205DO
UT WOS:000323421900037
PM 23851092
ER
PT J
AU Busygina, V
Gaines, WA
Xu, YY
Kwon, Y
Williams, GJ
Lin, SW
Chang, HY
Chi, P
Wang, HW
Sung, P
AF Busygina, Valeria
Gaines, William A.
Xu, Yuanyuan
Kwon, Youngho
Williams, Gareth J.
Lin, Sheng-Wei
Chang, Hao-Yen
Chi, Peter
Wang, Hong-Wei
Sung, Patrick
TI Functional attributes of the Saccharomyces cerevisiae meiotic
recombinase Dmc1
SO DNA REPAIR
LA English
DT Article
DE Dmc1 recombinase; Homologous recombination; Meiosis
ID DNA STRAND EXCHANGE; RAD51 NUCLEOPROTEIN FILAMENTS; HELICAL FILAMENTS;
GENETIC-RECOMBINATION; YEAST RAD51; MEIOSIS; PROTEIN; HOMOLOG; COMPLEX;
ROLES
AB The role of Dmc1 as a meiosis-specific general recombinase was first demonstrated in Saccharomyces cerevisiae. Progress in understanding the biochemical mechanism of ScDmc1 has been hampered by its tendency to form inactive aggregates. We have found that the inclusion of ATP during protein purification prevents Dmc1 aggregation. ScDmc1 so prepared is capable of forming D-loops and responsive to its accessory factors Rad54 and Rdh54. Negative staining electron microscopy and iterative helical real-space reconstruction revealed that the ScDmc1-ssDNA nucleoprotein filament harbors 6.5 protomers per turn with a pitch of similar to 106 angstrom. The ScDmc1 purification procedure and companion molecular analyses should facilitate future studies on this recombinase. (c) 2013 Elsevier B.V. All rights reserved.
C1 [Busygina, Valeria; Gaines, William A.; Xu, Yuanyuan; Kwon, Youngho; Sung, Patrick] Yale Univ, Sch Med, Dept Mol Biophys & Biochem, New Haven, CT 06520 USA.
[Williams, Gareth J.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA.
[Lin, Sheng-Wei; Chi, Peter] Acad Sinica, Inst Biol Chem, Taipei 115, Taiwan.
[Chang, Hao-Yen; Chi, Peter] Natl Taiwan Univ, Inst Biochem Sci, Taipei 10617, Taiwan.
[Wang, Hong-Wei] Tsinghua Univ, Tsinghua Peking Joint Ctr Life Sci, Struct Biol Ctr, Minist Educ,Prot Sci Lab,Sch Life Sci, Beijing 100084, Peoples R China.
RP Sung, P (reprint author), Yale Univ, Sch Med, Dept Mol Biophys & Biochem, 333 Cedar St,SHM C130, New Haven, CT 06520 USA.
EM Patrick.Sung@yale.edu
RI Lin, Sheng-Wei/G-8142-2015;
OI CHI, HUNG-YUAN/0000-0001-9229-8729
FU NIH [RO1GM057814, RO1ES007061, PO1CA092584, F32GM101808]; National
Science Council of Taiwan [NSC 100-2311-B-002-009]; National Taiwan
University [102R7848, 102R7560-6]; National Basic Research Program of
China [2010CB912401]; National Center for Protein Sciences Beijing
FX We are grateful to Douglas Bishop for the (His)6-ScDmc1
expression plasmid and to Edward Egelman for the IHRSR processing
package used in the 3D reconstructions. Image acquisition and processing
were conducted in the Yale CryoEM and High Performance Computational
facilities. This study was supported by NIH grants RO1GM057814,
RO1ES007061, and PO1CA092584, NIH postdoctoral fellowship F32GM101808,
National Science Council of Taiwan grant NSC 100-2311-B-002-009,
National Taiwan University grants 102R7848 and 102R7560-6, National
Basic Research Program of China grant 2010CB912401, and the National
Center for Protein Sciences Beijing.
NR 41
TC 4
Z9 5
U1 1
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1568-7864
J9 DNA REPAIR
JI DNA Repair
PD SEP
PY 2013
VL 12
IS 9
BP 707
EP 712
DI 10.1016/j.dnarep.2013.05.004
PG 6
WC Genetics & Heredity; Toxicology
SC Genetics & Heredity; Toxicology
GA 205TT
UT WOS:000323468400003
PM 23769192
ER
PT J
AU Horton, JK
Stefanick, DF
Gassman, NR
Williams, JG
Gabel, SA
Cuneo, MJ
Prasad, R
Kedar, PS
DeRose, EF
Hou, EW
London, RE
Wilson, SH
AF Horton, Julie K.
Stefanick, Donna F.
Gassman, Natalie R.
Williams, Jason G.
Gabel, Scott A.
Cuneo, Matthew J.
Prasad, Rajendra
Kedar, Padmini S.
DeRose, Eugene F.
Hou, Esther W.
London, Robert E.
Wilson, Samuel H.
TI Preventing oxidation of cellular XRCC1 affects PARP-mediated DNA damage
responses
SO DNA REPAIR
LA English
DT Article
DE DNA polymerase beta; XRCC1; PARP-1; Methyl methanesulfonate; PARP
inhibitor; Poly(ADP-ribose)
ID STRAND-BREAK REPAIR; BASE EXCISION-REPAIR; POLYMERASE-BETA INTERACTION;
LIGASE III-ALPHA; BRCT DOMAIN; NUCLEAR ANTIGEN; PROTEIN; CELLS;
POLY(ADP-RIBOSE); HYPERSENSITIVITY
AB Poly(ADP-ribose) polymerase-1 (PARP-1) binds intermediates of base excision repair (BER) and becomes activated for poly(ADP-ribose) (PAR) synthesis. PAR mediates recruitment and functions of the key BER factors XRCC1 and DNA polymerase beta (pol beta) that in turn regulate PAR. Yet, the molecular mechanism and implications of coordination between XRCC1 and pol beta in regulating the level of PAR are poorly understood. A complex of PARP-1, XRCC1 and pol beta is found in vivo, and it is known that pol beta and XRCC1 interact through a redox-sensitive binding interface in the N-terminal domain of XRCC1. We confirmed here that both oxidized and reduced forms of XRCC1 are present in mouse fibroblasts. To further understand the importance of the C12-C20 oxidized form of XRCC1 and the interaction with pol beta, we characterized cell lines representing stable transfectants in Xrcc1(-/-) mouse fibroblasts of wildtype XRCC1 and two mutants of XRCC1, a novel reduced form with the C12-C20 disulfide bond blocked (C12A) and a reference mutant that is unable to bind pol beta (V88R). XRCC1-deficient mouse fibroblasts are extremely hypersensitive to methyl methanesulfonate (MMS), and transfected wild-type and C12A mutant XRCC1 proteins similarly reversed MMS hypersensitivity. However, after MMS exposure the cellular PAR level was found to increase to a much greater extent in cells expressing the C12A mutant than in cells expressing wild-type XRCC1. PARP inhibition resulted in very strong MMS sensitization in cells expressing wild-type XRCC1, but this sensitization was much less in cells expressing the C12A mutant. The results suggest a role for the oxidized form of XRCC1 in the interaction with pol beta in (1) controlling the PAR level after MMS exposure and (2) enabling the extreme cytotoxicity of PARP inhibition during the MMS DNA damage response. Published by Elsevier B.V.
C1 [Horton, Julie K.; Stefanick, Donna F.; Gassman, Natalie R.; Williams, Jason G.; Gabel, Scott A.; Prasad, Rajendra; Kedar, Padmini S.; DeRose, Eugene F.; Hou, Esther W.; London, Robert E.; Wilson, Samuel H.] NIEHS, Struct Biol Lab, NIH, Res Triangle Pk, NC 27709 USA.
[Cuneo, Matthew J.] Oak Ridge Natl Lab, Biol & Soft Matter Div, Oak Ridge, TN 37831 USA.
RP Wilson, SH (reprint author), NIEHS, Struct Biol Lab, NIH, 111 TW Alexander Dr,POB 12233, Res Triangle Pk, NC 27709 USA.
EM wilson5@niehs.nih.gov
OI Gassman, Natalie/0000-0002-8488-2332; Cuneo, Matthew/0000-0002-1475-6656
FU Intramural Research Program of the NIH, National Institute of
Environmental Health Sciences [Z01 ES050158, ES050159, Z01 ES050147]
FX This work was supported by the Intramural Research Program of the NIH,
National Institute of Environmental Health Sciences (project numbers Z01
ES050158, ES050159 to S.H.W. and Z01 ES050147 to R.E.L.).
NR 37
TC 12
Z9 14
U1 0
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1568-7864
J9 DNA REPAIR
JI DNA Repair
PD SEP
PY 2013
VL 12
IS 9
BP 774
EP 785
DI 10.1016/j.dnarep.2013.06.004
PG 12
WC Genetics & Heredity; Toxicology
SC Genetics & Heredity; Toxicology
GA 205TT
UT WOS:000323468400010
PM 23871146
ER
PT J
AU Pouchard, LC
Branstetter, ML
Cook, RB
Devarakonda, R
Green, J
Palanisamy, G
Alexander, P
Noy, NF
AF Pouchard, Line C.
Branstetter, Marcia L.
Cook, Robert B.
Devarakonda, Ranjeet
Green, Jim
Palanisamy, Giri
Alexander, Paul
Noy, Natalya F.
TI A Linked Science investigation: enhancing climate change data discovery
with semantic technologies
SO EARTH SCIENCE INFORMATICS
LA English
DT Article
DE Linked Science; Ontologies; BioPortal; Semantic search; Climate change;
Data discovery
ID ONTOLOGY; WEB; ACCESS; SYSTEM; EARTH
AB Linked Science is the practice of inter-connecting scientific assets by publishing, sharing and linking scientific data and processes in end-to-end loosely coupled workflows that allow the sharing and re-use of scientific data. Much of this data does not live in the cloud or on the Web, but rather in multi-institutional data centers that provide tools and add value through quality assurance, validation, curation, dissemination, and analysis of the data. In this paper, we make the case for the use of scientific scenarios in Linked Science. We propose a scenario in river-channel transport that requires biogeochemical experimental data and global climate-simulation model data from many sources. We focus on the use of ontologies-formal machine-readable descriptions of the domain-to facilitate search and discovery of this data. Mercury, developed at Oak Ridge National Laboratory, is a tool for distributed metadata harvesting, search and retrieval. Mercury currently provides uniform access to more than 100,000 metadata records; 30,000 scientists use it each month. We augmented search in Mercury with ontologies, such as the ontologies in the Semantic Web for Earth and Environmental Terminology (SWEET) collection by prototyping a component that provides access to the ontology terms from Mercury. We evaluate the coverage of SWEET for the ORNL Distributed Active Archive Center (ORNL DAAC).
C1 [Pouchard, Line C.; Branstetter, Marcia L.; Cook, Robert B.; Devarakonda, Ranjeet; Green, Jim; Palanisamy, Giri] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
[Alexander, Paul; Noy, Natalya F.] Stanford Univ, Stanford Ctr Biomed Informat Res, Stanford, CA 94305 USA.
RP Pouchard, LC (reprint author), Oak Ridge Natl Lab, 1 Bethel Valley Rd, Oak Ridge, TN 37831 USA.
EM pouchardlc@ornl.gov
RI Devarakonda, Ranjeet/E-5976-2016;
OI Devarakonda, Ranjeet/0000-0003-2661-1937; Cook,
Robert/0000-0001-7393-7302
FU U.S. Department of Energy [De-AC05-00OR22725]
FX This work has been in part performed at Oak Ridge National Laboratory,
Managed by UT Battelle, LLC under Contract No. De-AC05-00OR22725 for the
U.S. Department of Energy.
NR 31
TC 5
Z9 5
U1 1
U2 34
PU SPRINGER HEIDELBERG
PI HEIDELBERG
PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
SN 1865-0473
EI 1865-0481
J9 EARTH SCI INFORM
JI Earth Sci. Inform.
PD SEP
PY 2013
VL 6
IS 3
BP 175
EP 185
DI 10.1007/s12145-013-0118-2
PG 11
WC Computer Science, Interdisciplinary Applications; Geosciences,
Multidisciplinary
SC Computer Science; Geology
GA 206DK
UT WOS:000323497400006
ER
PT J
AU Lai, Y
Beaver, J
Lorente, K
Ramjagsingh, S
McMurray, C
Zhang, Z
Liu, Y
AF Lai, Y.
Beaver, J.
Lorente, K.
Ramjagsingh, S.
McMurray, C.
Zhang, Z.
Liu, Y.
TI MSH2-MSH3 Promotes GAA Repeat Expansion by Stimulating DNA Polymerase
beta Activity during Base Excision Repair
SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS
LA English
DT Meeting Abstract
CT 44th Annual Meeting of the
Environmental-Mutagenesis-and-Genomics-Society (EMGS)
CY SEP 21-25, 2013
CL Monterey, CA
SP Environm Mutagenesis & Genom Soc (EMGS)
C1 [Lai, Y.; Beaver, J.; Lorente, K.; Ramjagsingh, S.; Liu, Y.] Florida Int Univ, Dept Chem & Biochem, Miami, FL 33199 USA.
[Lai, Y.; Zhang, Z.] Sichuan Univ, Dept Environm & Occupat Hlth, West China Sch Publ Hlth, Chengdu 610064, Peoples R China.
[McMurray, C.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0893-6692
J9 ENVIRON MOL MUTAGEN
JI Environ. Mol. Mutagen.
PD SEP
PY 2013
VL 54
SU 1
BP S30
EP S30
PG 1
WC Environmental Sciences; Genetics & Heredity; Toxicology
SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology
GA 205FV
UT WOS:000323429400071
ER
PT J
AU Nath, R
Vulimiri, S
Pachkowski, B
Sonawane, B
AF Nath, R.
Vulimiri, S.
Pachkowski, B.
Sonawane, B.
TI Evidence for Genotoxicity and Mutagenicity of Formaldehyde
SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS
LA English
DT Meeting Abstract
CT 44th Annual Meeting of the
Environmental-Mutagenesis-and-Genomics-Society (EMGS)
CY SEP 21-25, 2013
CL Monterey, CA
SP Environm Mutagenesis & Genom Soc (EMGS)
C1 [Nath, R.; Vulimiri, S.; Pachkowski, B.; Sonawane, B.] US EPA, Natl Ctr Environm Assessment, Off Res & Dev, Washington, DC 20460 USA.
[Pachkowski, B.] Oak Ridge Inst Sci & Educ, Washington, DC USA.
NR 0
TC 0
Z9 0
U1 1
U2 6
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0893-6692
J9 ENVIRON MOL MUTAGEN
JI Environ. Mol. Mutagen.
PD SEP
PY 2013
VL 54
SU 1
BP S45
EP S45
PG 1
WC Environmental Sciences; Genetics & Heredity; Toxicology
SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology
GA 205FV
UT WOS:000323429400134
ER
PT J
AU Snijders, AM
Blakeley, E
Chang, P
Sridharan, D
Mori, H
Rosen, C
Bjornstad, K
Huang, Y
Mao, JH
Pluth, J
AF Snijders, A. M.
Blakeley, E.
Chang, P.
Sridharan, D.
Mori, H.
Rosen, C.
Bjornstad, K.
Huang, Y.
Mao, J. H.
Pluth, J.
TI Exposure to Bisphenol-A Alters Mammary Gland Development and Increases
Breast Cancer Risk.
SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS
LA English
DT Meeting Abstract
CT 44th Annual Meeting of the
Environmental-Mutagenesis-and-Genomics-Society (EMGS)
CY SEP 21-25, 2013
CL Monterey, CA
SP Environm Mutagenesis & Genom Soc (EMGS)
C1 [Snijders, A. M.; Blakeley, E.; Chang, P.; Sridharan, D.; Mori, H.; Rosen, C.; Bjornstad, K.; Huang, Y.; Mao, J. H.; Pluth, J.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Chang, P.] SRI Int, Menlo Pk, CA 94025 USA.
NR 0
TC 0
Z9 0
U1 1
U2 12
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0893-6692
J9 ENVIRON MOL MUTAGEN
JI Environ. Mol. Mutagen.
PD SEP
PY 2013
VL 54
SU 1
BP S41
EP S41
PG 1
WC Environmental Sciences; Genetics & Heredity; Toxicology
SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology
GA 205FV
UT WOS:000323429400116
ER
PT J
AU Sridharan, D
Chappell, L
Wilson, W
Whalen, M
Cucinotta, F
Pluth, J
AF Sridharan, D.
Chappell, L.
Wilson, W.
Whalen, M.
Cucinotta, F.
Pluth, J.
TI Genomic Instability Elicited by the Mutagenic Heavy Ions in Space
Differs with Cell Type and Radiation Quality.
SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS
LA English
DT Meeting Abstract
CT 44th Annual Meeting of the
Environmental-Mutagenesis-and-Genomics-Society (EMGS)
CY SEP 21-25, 2013
CL Monterey, CA
SP Environm Mutagenesis & Genom Soc (EMGS)
C1 [Sridharan, D.; Wilson, W.; Whalen, M.; Pluth, J.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Chappell, L.; Cucinotta, F.] NASA, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0893-6692
J9 ENVIRON MOL MUTAGEN
JI Environ. Mol. Mutagen.
PD SEP
PY 2013
VL 54
SU 1
BP S55
EP S55
PG 1
WC Environmental Sciences; Genetics & Heredity; Toxicology
SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology
GA 205FV
UT WOS:000323429400172
ER
PT J
AU Sridharan, D
Snijders, A
Blakely, E
Chang, P
Rosen, C
Bjornstad, K
Mao, JH
Pluth, J
AF Sridharan, D.
Snijders, A.
Blakely, E.
Chang, P.
Rosen, C.
Bjornstad, K.
Mao, J-H
Pluth, J.
TI Environmental Levels of Bisphenol-A Can Expand Numbers of Mammary Stem
Cells and Potentially Increase Breast Cancer Risk.
SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS
LA English
DT Meeting Abstract
CT 44th Annual Meeting of the
Environmental-Mutagenesis-and-Genomics-Society (EMGS)
CY SEP 21-25, 2013
CL Monterey, CA
SP Environm Mutagenesis & Genom Soc (EMGS)
C1 [Sridharan, D.; Snijders, A.; Blakely, E.; Chang, P.; Rosen, C.; Bjornstad, K.; Mao, J-H; Pluth, J.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
NR 0
TC 1
Z9 1
U1 0
U2 10
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0893-6692
J9 ENVIRON MOL MUTAGEN
JI Environ. Mol. Mutagen.
PD SEP
PY 2013
VL 54
SU 1
BP S41
EP S41
PG 1
WC Environmental Sciences; Genetics & Heredity; Toxicology
SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology
GA 205FV
UT WOS:000323429400115
ER
PT J
AU Williams, PT
AF Williams, Paul T.
TI Walking and Running Produce Similar Reductions in Cause-Specific Disease
Mortality in Hypertensives
SO HYPERTENSION
LA English
DT Article
DE cardiovascular diseases; diabetes mellitus; type 2; exercise;
hypertension; renal insufficiency; chronic
ID CORONARY-HEART-DISEASE; DEATH CERTIFICATE COMPLETION; TYPE-2
DIABETES-MELLITUS; TIME PHYSICAL-ACTIVITY; RISK-FACTORS; CARDIOVASCULAR
MORTALITY; INSULIN-RESISTANCE; BLOOD-PRESSURE; ANTIHYPERTENSIVE THERAPY;
ATRIAL-FIBRILLATION
AB To test prospectively in hypertensives whether moderate and vigorous exercise produces equivalent reductions in mortality, Cox-proportional hazard analyses were applied to energy expenditure (metabolic equivalents hours/d [METh/d]) in 6973 walkers and 3907 runners who used hypertensive medications at baseline. A total of 1121 died during 10.2-year follow-up: 695 cardiovascular disease (International Classification of Diseases, Tenth Revision [ICD10] I00-99; 465 underlying cause and 230 contributing cause), 124 cerebrovascular disease, 353 ischemic heart disease (ICD10 I20-25; 257 underlying and 96 contributing), 122 heart failure (ICD10 I50; 24 underlying and 98 contributing), and 260 dysrhythmias (ICD10 I46-49; 24 underlying and 236 contributing). Relative to <1.07 METh/d, running or walking 1.8 to 3.6 METh/d produced significantly lower all-cause (29% reduction; 95% confidence interval [CI], 17%-39%; P=0.0001), cardiovascular disease (34% reduction; 95% CI, 20%-46%; P=0.0001), cerebrovascular disease (55% reduction; 95% CI, 27%-73%; P=0.001), dysrhythmia (47% reduction; 95% CI, 27%-62%; P=0.0001), and heart failure mortality (51% reduction; 95% CI, 21%-70%; P=0.003), as did 3.6 METh/d with all-cause (22% reduction; 95% CI, 6%-35%; P=0.005), cardiovascular disease (36% reduction; 95% CI, 19%-50%; P=0.0002), cerebrovascular disease (47% reduction; 95% CI, 6%-71%; P=0.03), and dysrhythmia mortality (43% reduction; 95% CI, 16%-62%; P=0.004). Diabetes mellitus and chronic kidney disease mortality also decreased significantly with METh/d. All results remained significant when body mass index adjusted. Merely meeting guideline levels (1.07-1.8 METh/d) did not significantly reduced mortality. The dose-response was significantly nonlinear for all end points except diabetes mellitus, and cerebrovascular and chronic kidney disease. Results did not differ between running and walking. Thus, walking and running produce similar reductions in mortality in hypertensives.
C1 [Williams, Paul T.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Williams, PT (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Donner 464,1 Cycloton Rd, Berkeley, CA 94720 USA.
EM ptwilliams@lbl.gov
FU National Heart, Lung, and Blood Institute [HL094717]
FX This research was supported by grant HL094717 from the National Heart,
Lung, and Blood Institute and was conducted at the Ernest Orlando
Lawrence Berkeley National Laboratory (Department of Energy
DE-AC03-76SF00098 to the University of California). The funders had no
role in study design, data collection, and analysis, decision to
publish, or preparation of the article.
NR 46
TC 5
Z9 5
U1 0
U2 7
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0194-911X
J9 HYPERTENSION
JI Hypertension
PD SEP
PY 2013
VL 62
IS 3
BP 485
EP 491
DI 10.1161/HYPERTENSIONAHA.113.01608
PG 7
WC Peripheral Vascular Disease
SC Cardiovascular System & Cardiology
GA 201OA
UT WOS:000323149700018
PM 23940195
ER
PT J
AU Brislawn, CM
AF Brislawn, Christopher M.
TI Group-Theoretic Structure of Linear Phase Multirate Filter Banks
SO IEEE TRANSACTIONS ON INFORMATION THEORY
LA English
DT Article
DE Filter bank; free product; group; group lifting structure; JPEG 2000;
lifting; linear phase filter; polyphase matrix; semidirect product;
unique factorization; wavelet
ID GROUP LIFTING STRUCTURES; PRODUCT GROUP-APPROACH; COMPRESSION STANDARD;
WIDE-BAND; SYMMETRIC EXTENSION; CODING STANDARD; DIGITAL AUDIO; SPEECH;
SIGNAL; FACTORIZATIONS
AB Unique lifting factorization results for group lifting structures are used to characterize the group-theoretic structure of two-channel linear phase FIR perfect reconstruction filter bank groups. For D-invariant, order-increasing group lifting structures, it is shown that the associated lifting cascade group C is isomorphic to the free product of the upper and lower triangular lifting matrix groups. Under the same hypotheses, the associated scaled lifting group S is the semidirect product of C by the diagonal gain scaling matrix group D. These results apply to the group lifting structures for the two principal classes of linear phase perfect reconstruction filter banks, the whole-and half-sample symmetric classes. Since the unimodular whole-sample symmetric class forms a group, W, that is in fact equal to its own scaled lifting group,W = S-W, the results of this paper characterize the group-theoretic structure of W up to isomorphism. Although the half-sample symmetric class h does not form a group, it can be partitioned into cosets of its lifting cascade group,C-h, or, alternatively, into cosets of its scaled lifting group, S-h. Homomorphic comparisons reveal that scaled lifting groups covered by the results in this paper have a structure analogous to a "noncommutative vector space."
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Brislawn, CM (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM brislawn@lanl.gov
FU U.S. Department of Energy [DE-AC52-06NA25396]; Los Alamos
Laboratory-Directed Research & Development Program
FX Los Alamos National Laboratory is operated by Los Alamos National
Security LLC for the U.S. Department of Energy under contract
DE-AC52-06NA25396. This work was supported in part by the Los Alamos
Laboratory-Directed Research & Development Program, Kristi D. Brislawn,
and Reilly R. Brislawn.
NR 86
TC 0
Z9 0
U1 0
U2 8
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9448
J9 IEEE T INFORM THEORY
JI IEEE Trans. Inf. Theory
PD SEP
PY 2013
VL 59
IS 9
BP 5842
EP 5859
DI 10.1109/TIT.2013.2259292
PG 18
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA 205PE
UT WOS:000323455800041
ER
PT J
AU Alalaimi, M
Lorente, S
Anderson, R
Bejan, A
AF Alalaimi, M.
Lorente, S.
Anderson, R.
Bejan, A.
TI Effect of size on ground-coupled heat pump performance
SO INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
LA English
DT Article
DE Constructal design; Cooling; Heat pumps; Ground heat exchangers
ID POWER-PLANTS
AB Here we document and explain interactions between two thermodynamic trends that determine the optimum performance of refrigeration and heat pump systems. We show analytically why the performance of the system must increase with the size of the installation. The second law efficiency of heat pump systems must increase with their size. We also show that the power requirement for a specific ground-coupled heat pump system must decrease as the size of the ground heat exchanger increases. From these two trends emerges the tradeoff between the size of the heat pump and the size of the ground heat exchanger. The challenge is to find the optimum size of the ground-coupled heat pump. We show numerically the optimum heat pump size and the ground heat exchanger size that correspond to minimum total power requirement subject to a cost constraint. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Alalaimi, M.; Bejan, A.] Duke Univ, Dept Mech Engn & Mat Sci, Durham, NC 27708 USA.
[Lorente, S.] Univ Toulouse, UPS, INSA, LMDC, F-31077 Toulouse 04, France.
[Anderson, R.] Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Bejan, A (reprint author), Duke Univ, Dept Mech Engn & Mat Sci, Durham, NC 27708 USA.
EM dalford@duke.edu
FU Kuwait University; National Renewable Energy Laboratory
FX Mr. Alalaimi's work was supported by Kuwait University. Drs. Lorente,
Anderson, and Bejan's work was sponsored by the National Renewable
Energy Laboratory.
NR 20
TC 5
Z9 5
U1 0
U2 21
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0017-9310
EI 1879-2189
J9 INT J HEAT MASS TRAN
JI Int. J. Heat Mass Transf.
PD SEP
PY 2013
VL 64
BP 115
EP 121
DI 10.1016/j.ijheatmasstransfer.2013.04.034
PG 7
WC Thermodynamics; Engineering, Mechanical; Mechanics
SC Thermodynamics; Engineering; Mechanics
GA 202RI
UT WOS:000323236900013
ER
PT J
AU Yu, WH
Timofeeva, EV
Singh, D
France, DM
Smith, RK
AF Yu, Wenhua
Timofeeva, Elena V.
Singh, Dileep
France, David M.
Smith, Roger K.
TI Investigations of heat transfer of copper-in-Therminol 59 nanofluids
SO INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
LA English
DT Article
DE Nanofluid; Convective heat transfer; Turbulent flow; Heat transfer
prediction; Heat transfer enhancement
ID THERMAL-CONDUCTIVITY; TRANSFER ENHANCEMENT; FLOW
AB Convective turbulent-flow heat transfer experiments were performed with Therminol 59-based nanofluids containing copper nanoparticles at particle volume concentrations of 0.50% and 0.75%. These nanofluids have the unusual properties of being significantly above the thermal conductivity predictions of the effective medium theory with high dynamic viscosities. The friction factors and heat transfer coefficients of the nanofluids were experimentally determined and compared to the predictions from the standard correlation equations. The experimental heat transfer coefficient enhancements were also compared to the predicted heat transfer coefficient ratios of the nanofluids over the base fluid using their thermophysical properties. Finally, based on the measured thermophysical properties and heat transfer coefficients of the nanofluids, the effect of elevated temperature on the heat transfer coefficient ratios of the nanofluids over the base fluid were evaluated. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Yu, Wenhua; Timofeeva, Elena V.; Smith, Roger K.] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA.
[Singh, Dileep] Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA.
[France, David M.] Univ Illinois, Dept Mech & Ind Engn, Chicago, IL 60607 USA.
RP Yu, WH (reprint author), Argonne Natl Lab, Div Energy Syst, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM wyu@anl.gov; etimofeeva@anl.gov; dsingh@anl.gov; dfrance@uic.edu;
rk.smith@anl.gov
RI Timofeeva, Elena/E-6391-2010;
OI Timofeeva, Elena V./0000-0001-7839-2727
FU US Department of Energy's Solar Energy Technology Program Office,
American Recovery and Reinvestment Act (ARRA) at Argonne National
Laboratory [DE-AC02-06CH11357]
FX This work was sponsored by the US Department of Energy's Solar Energy
Technology Program Office, American Recovery and Reinvestment Act (ARRA)
funding, under contract number DE-AC02-06CH11357 at Argonne National
Laboratory, managed by UChicago Argonne LLC. Experimental assistance by
J. Gaviria and K. Velvadapu is acknowledged.
NR 35
TC 11
Z9 11
U1 2
U2 10
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0017-9310
J9 INT J HEAT MASS TRAN
JI Int. J. Heat Mass Transf.
PD SEP
PY 2013
VL 64
BP 1196
EP 1204
DI 10.1016/j.ijheatmasstransfer.2013.03.023
PG 9
WC Thermodynamics; Engineering, Mechanical; Mechanics
SC Thermodynamics; Engineering; Mechanics
GA 202RI
UT WOS:000323236900114
ER
PT J
AU Zhou, AF
Baidoo, E
He, ZL
Mukhopadhyay, A
Baumohl, JK
Benke, P
Joachimiak, MP
Xie, M
Song, R
Arkin, AP
Hazen, TC
Keasling, JD
Wall, JD
Stahl, DA
Zhou, JZ
AF Zhou, Aifen
Baidoo, Edward
He, Zhili
Mukhopadhyay, Aindrila
Baumohl, Jason K.
Benke, Peter
Joachimiak, Marcin P.
Xie, Ming
Song, Rong
Arkin, Adam P.
Hazen, Terry C.
Keasling, Jay D.
Wall, Judy D.
Stahl, David A.
Zhou, Jizhong
TI Characterization of NaCl tolerance in Desulfovibrio vulgaris
Hildenborough through experimental evolution
SO ISME JOURNAL
LA English
DT Article
DE D. vulgaris; experimental evolution; salt adaptation; transcriptomics;
metabolites assay; PLFA analysis
ID SULFATE-REDUCING BACTERIA; UPTAKE REGULATOR FUR; BACILLUS-SUBTILIS;
ESCHERICHIA-COLI; HYPEROSMOTIC STRESS; GLYCINE BETAINE; OSMOTIC-STRESS;
HIGH-SALINITY; SALT STRESS; ADAPTATION
AB Desulfovibrio vulgaris Hildenborough strains with significantly increased tolerance to NaCl were obtained via experimental evolution. A NaCl-evolved strain, ES9-11, isolated from a population cultured for 1200 generations in medium amended with 100 mM NaCl, showed better tolerance to NaCl than a control strain, EC3-10, cultured for 1200 generations in parallel but without NaCl amendment in medium. To understand the NaCl adaptation mechanism in ES9-11, we analyzed the transcriptional, metabolite and phospholipid fatty acid (PLFA) profiles of strain ES9-11 with 0, 100- or 250 mM-added NaCl in medium compared with the ancestral strain and EC3-10 as controls. In all the culture conditions, increased expressions of genes involved in amino-acid synthesis and transport, energy production, cation efflux and decreased expression of flagellar assembly genes were detected in ES9-11. Consistently, increased abundances of organic solutes and decreased cell motility were observed in ES9-11. Glutamate appears to be the most important osmoprotectant in D. vulgaris under NaCl stress, whereas, other organic solutes such as glutamine, glycine and glycine betaine might contribute to NaCl tolerance under low NaCl concentration only. Unsaturation indices of PLFA significantly increased in ES9-11. Branched unsaturated PLFAs vertical bar 17: 1 omega 9c, a17: 1 omega 9c and branched saturated i15: 0 might have important roles in maintaining proper membrane fluidity under NaCl stress. Taken together, these data suggest that the accumulation of osmolytes, increased membrane fluidity, decreased cell motility and possibly an increased exclusion of Na+ contribute to increased NaCl tolerance in NaCl-evolved D. vulgaris.
C1 [Zhou, Aifen; He, Zhili; Xie, Ming; Song, Rong; Zhou, Jizhong] Univ Oklahoma, Inst Environm Genom, Dept Microbiol & Plant Biol, Norman, OK 73019 USA.
[Baidoo, Edward; Mukhopadhyay, Aindrila; Baumohl, Jason K.; Benke, Peter; Joachimiak, Marcin P.; Arkin, Adam P.; Keasling, Jay D.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
[Hazen, Terry C.] Univ Tennessee, Dept Civil & Environm Engn, Knoxville, TN USA.
[Hazen, Terry C.] Oak Ridge Natl Lab, Biosci Div, Oak Ridge, TN USA.
[Wall, Judy D.] Univ Missouri, Dept Biochem, Columbia, MO USA.
[Wall, Judy D.] Univ Missouri, Dept Mol Microbiol & Immunol, Columbia, MO USA.
[Stahl, David A.] Univ Washington, Dept Civil & Environm Engn, Seattle, WA 98195 USA.
[Zhou, Jizhong] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
[Zhou, Jizhong] Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China.
RP Zhou, JZ (reprint author), Univ Oklahoma, Inst Environm Genom, Dept Microbiol & Plant Biol, Norman, OK 73019 USA.
EM jzhou@ou.edu
RI Keasling, Jay/J-9162-2012; Arkin, Adam/A-6751-2008; Hazen,
Terry/C-1076-2012
OI Keasling, Jay/0000-0003-4170-6088; Arkin, Adam/0000-0002-4999-2931;
Hazen, Terry/0000-0002-2536-9993
FU Office of Science, Office of Biological and Environmental Research, US
Department of Energy [DE-AC02-05CH11231]
FX This work conducted by ENIGMA-Ecosystems and Networks Integrated with
Genes and Molecular Assemblies (http://enigma.lbl.gov)-a Scientific
Focus Area Program at Lawrence Berkeley National Laboratory, was
supported by the Office of Science, Office of Biological and
Environmental Research, US Department of Energy under Contract No.
DE-AC02-05CH11231.
NR 42
TC 12
Z9 12
U1 3
U2 42
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1751-7362
J9 ISME J
JI ISME J.
PD SEP
PY 2013
VL 7
IS 9
BP 1790
EP 1802
DI 10.1038/ismej.2013.60
PG 13
WC Ecology; Microbiology
SC Environmental Sciences & Ecology; Microbiology
GA 204RI
UT WOS:000323385600010
PM 23575373
ER
PT J
AU Isanapong, J
Hambright, WS
Willis, AG
Boonmee, A
Callister, SJ
Burnum, KE
Pasa-Tolic, L
Nicora, CD
Wertz, JT
Schmidt, TM
Rodrigues, JLM
AF Isanapong, Jantiya
Hambright, W. Sealy
Willis, Austin G.
Boonmee, Atcha
Callister, Stephen J.
Burnum, Kristin E.
Pasa-Tolic, Ljiljana
Nicora, Carrie D.
Wertz, John T.
Schmidt, Thomas M.
Rodrigues, Jorge L. M.
TI Development of an ecophysiological model for Diplosphaera colotermitum
TAV2, a termite hindgut Verrucomicrobium
SO ISME JOURNAL
LA English
DT Article
DE termite; microaerophilic; Verrucomicrobia; xylan
ID RETICULITERMES-SPERATUS; GUT MICROBIOTA; STENOXYBACTER-ACETIVORANS;
OBLIGATE MICROAEROPHILE; PHYSIOLOGICAL ECOLOGY; BACTERIAL MICROBIOTA;
MASS-SPECTROMETRY; SOFTWARE PACKAGE; OXIDATIVE STRESS; GEN. NOV.
AB Termite hindguts are populated by a dense and diverse community of microbial symbionts working in concert to transform lignocellulosic plant material and derived residues into acetate, to recycle and fix nitrogen, and to remove oxygen. Although much has been learned about the breadth of microbial diversity in the hindgut, the ecophysiological roles of its members is less understood. In this study, we present new information about the ecophysiology of microorganism Diplosphaera colotermitum strain TAV2, an autochthonous member of the Reticulitermes flavipes gut community. An integrated high-throughput approach was used to determine the transcriptomic and proteomic profiles of cells grown under hypoxia (2% O-2) or atmospheric (20% O-2) concentrations of oxygen. Our results revealed that genes and proteins associated with energy production and utilization, carbohydrate transport and metabolism, nitrogen fixation, and replication and recombination were upregulated under 2% O-2. The metabolic map developed for TAV2 indicates that this microorganism may be involved in biological nitrogen fixation, amino-acid production, hemicellulose degradation and consumption of O-2 in the termite hindgut. Variation of O-2 concentration explained 55.9% of the variance in proteomic profiles, suggesting an adaptive evolution of TAV2 to the hypoxic periphery of the hindgut. Our findings advance the current understanding of microaerophilic microorganisms in the termite gut and expand our understanding of the ecological roles for members of the phylum Verrucomicrobia.
C1 [Isanapong, Jantiya; Hambright, W. Sealy; Willis, Austin G.; Boonmee, Atcha; Rodrigues, Jorge L. M.] Univ Texas Arlington, Dept Biol, Arlington, TX 76019 USA.
[Isanapong, Jantiya] Univ Texas Arlington, Dept Earth & Environm Sci, Arlington, TX 76019 USA.
[Boonmee, Atcha] Khon Kaen Univ, Fac Sci, Dept Microbiol, Khon Kaen, Thailand.
[Callister, Stephen J.; Burnum, Kristin E.; Nicora, Carrie D.] Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
[Pasa-Tolic, Ljiljana] Pacific NW Natl Lab, Environm & Mol Sci Lab, Richland, WA 99352 USA.
[Wertz, John T.] Calvin Coll, Dept Biol, Grand Rapids, MI 49506 USA.
[Schmidt, Thomas M.] Univ Michigan, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 48109 USA.
[Schmidt, Thomas M.] Univ Michigan, Dept Internal Med, Ann Arbor, MI 48109 USA.
RP Rodrigues, JLM (reprint author), Univ Texas Arlington, Dept Biol, Arlington, TX 76019 USA.
EM Jorge@uta.edu
RI Burnum, Kristin/B-1308-2011;
OI Burnum, Kristin/0000-0002-2722-4149; Schmidt, Thomas/0000-0002-8209-6055
FU Department of Energy's Office of Biological and Environmental Research
at Pacific Northwest National Laboratory [EMSL 28690]
FX A portion of the research was performed using EMSL, a national
scientific user facility sponsored by the Department of Energy's Office
of Biological and Environmental Research and located at Pacific
Northwest National Laboratory (EMSL 28690). We thank Maeli Melotto and
John Breznak for critically reading this manuscript and providing
valuable suggestions.
NR 54
TC 5
Z9 5
U1 1
U2 24
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1751-7362
J9 ISME J
JI ISME J.
PD SEP
PY 2013
VL 7
IS 9
BP 1803
EP 1813
DI 10.1038/ismej.2013.74
PG 11
WC Ecology; Microbiology
SC Environmental Sciences & Ecology; Microbiology
GA 204RI
UT WOS:000323385600011
PM 23657364
ER
PT J
AU Wang, SY
L'Heureux, M
Yoon, JH
AF Wang, Shih-Yu
L'Heureux, Michelle
Yoon, Jin-Ho
TI Are Greenhouse Gases Changing ENSO Precursors in the Western North
Pacific?
SO JOURNAL OF CLIMATE
LA English
DT Article
DE Atmosphere-ocean interaction; ENSO; Climate models
ID SEASONAL FOOTPRINTING MECHANISM; SEA-SURFACE TEMPERATURES; REANALYSIS
PROJECT; INDIAN MONSOON; VARIABILITY; ANOMALIES; IMPACT; MODEL;
20TH-CENTURY; EVOLUTION
AB Using multiple observational and model datasets, the authors document a strengthening relationship between boreal winter sea surface temperature anomalies (SSTAs) in the western North Pacific (WNP) and the development of the El Nino-Southern Oscillation (ENSO) in the following year. The increased WNP-ENSO association emerged in the mid-twentieth century and has grown through the present, reaching correlation coefficients as high as similar to 0.70 in recent decades. Fully coupled climate experiments with the Community Earth System Model, version 1 (CESM1), replicate the WNP-ENSO association and indicate that greenhouse gases (GHGs) are largely responsible for this observed increase. The authors speculate that shifts in the location of the largest positive SST trends between the subtropical and tropical western Pacific impact the low-level circulation in a manner that reinforces the link between the WNP and the development of ENSO. A strengthened GHG-driven relationship with the WNP provides an example of how anthropogenic climate change may directly influence one of the most prominent patterns of natural climate variability, ENSO, and potentially improve the skill of intraseasonal-to-interannual climate prediction.
C1 [Wang, Shih-Yu] Utah State Univ, Utah Climate Ctr, Logan, UT 84322 USA.
[Wang, Shih-Yu] Utah State Univ, Dept Plants Soils & Climate, Logan, UT 84322 USA.
[L'Heureux, Michelle] NOAA, NCEP, Climate Predict Ctr, Camp Springs, MD USA.
[Yoon, Jin-Ho] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Wang, SY (reprint author), 4820 Old Main Hill, Logan, UT 84341 USA.
EM simon.wang@usu.edu
RI Wang, S.-Y. Simon/G-2566-2010; YOON, JIN-HO/A-1672-2009
OI YOON, JIN-HO/0000-0002-4939-8078
FU Utah State University Agricultural Experiment Station [8472]; Office of
Science of the U.S. Department of Energy as part of the Earth System
Modeling program; National Science Foundation; Office of Science of the
U.S. Department of Energy; Department of Energy [DE-AC06-76RLO1830];
[NNX13AC37G]; [MOTC-CWB-101-M-15]
FX Critical and valuable comments offered by Tony Barnston, Bruce Anderson,
and Karthik Balaguru are highly appreciated. This study was supported
under Grants NNX13AC37G, MOTC-CWB-101-M-15, and the Utah State
University Agricultural Experiment Station (approved as journal paper
8472). Jin-Ho Yoon is supported by the Office of Science of the U.S.
Department of Energy as part of the Earth System Modeling program. The
CESM project is supported by the National Science Foundation and the
Office of Science of the U.S. Department of Energy. PNNL is operated for
the Department of Energy by Battelle Memorial Institute under Contract
DE-AC06-76RLO1830.
NR 38
TC 14
Z9 14
U1 1
U2 26
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0894-8755
EI 1520-0442
J9 J CLIMATE
JI J. Clim.
PD SEP
PY 2013
VL 26
IS 17
BP 6309
EP 6322
DI 10.1175/JCLI-D-12-00360.1
PG 14
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 205AK
UT WOS:000323412300006
ER
PT J
AU Fitch, AC
Olson, JB
Lundquist, JK
AF Fitch, Anna C.
Olson, Joseph B.
Lundquist, Julie K.
TI Parameterization of Wind Farms in Climate Models
SO JOURNAL OF CLIMATE
LA English
DT Article
DE Boundary layer; Friction; Surface fluxes; Surface temperature;
Parameterization; Renewable energy
ID ATMOSPHERIC BOUNDARY-LAYER; TURBULENCE CLOSURE-MODEL; LAND-SURFACE;
TURBINE WAKES; IMPACTS; SENSITIVITY; STABILITY; FLUXES; POWER; HEAT
AB For assessing the impacts of wind farms on regional climate, wind farms may be represented in climate models by an increase in aerodynamic roughness length. Studies employing this method have found near-surface temperature changes of 1-2 K over wind farm areas. By contrast, mesoscale and large-eddy simulations (LES), which represent wind farms as elevated sinks of momentum, generally showed temperature changes of less than 0.5 K. This study directly compares the two methods of representing wind farms in simulations of a strong diurnal cycle. Nearly the opposite wake structure is seen between the two methods, both during the day and at night. The sensible heat fluxes are generally exaggerated in the enhanced roughness approach, leading to much greater changes in temperature. Frequently, the two methods display the opposite sign in temperature change. Coarse resolution moderates the sensible heat fluxes but does not significantly improve the near-surface temperatures or low-level wind speed deficit. Since wind farm impacts modeled by the elevated momentum sink approach are similar to those seen in observations and from LES, the authors conclude that the increased surface roughness approach is not an appropriate option to represent wind farms or explore their impacts.
C1 [Fitch, Anna C.] Univ Bergen, Inst Geophys, Bergen, Norway.
[Fitch, Anna C.] Uni Res, Bergen, Norway.
[Fitch, Anna C.] Natl Ctr Atmospher Res, Mesoscale & Microscale Meteorol Div, Boulder, CO 80307 USA.
[Olson, Joseph B.] NOAA, Earth Syst Res Lab, Boulder, CO USA.
[Olson, Joseph B.] Univ Colorado, NOAA, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA.
[Lundquist, Julie K.] Univ Colorado Boulder, Dept Atmospher & Ocean Sci, Boulder, CO USA.
[Lundquist, Julie K.] Natl Renewable Energy Lab, Golden, CO USA.
RP Fitch, AC (reprint author), Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA.
EM fitch@ucar.edu
RI Olson, Joseph/N-3726-2014;
OI Olson, Joseph/0000-0003-3612-0808; LUNDQUIST, JULIE/0000-0001-5490-2702
FU NORCOWE; NREL LDRD [06501101]
FX We wish to thank RE power for providing the thrust and power
coefficients for the 5M turbine. We express our appreciation for
research funding from a variety of sources. Funding for ACF is from
NORCOWE and support for JKL is from NREL LDRD 06501101. We thank Jimy
Dudhia for useful discussions. All the simulations were performed on the
NREL/Sandia Red Mesa high-performance computing system. NREL is a
national laboratory of the U.S. Department of Energy, Office of Energy
Efficiency and Renewable Energy, operated by the Alliance for
Sustainable Energy, LLC.
NR 46
TC 21
Z9 21
U1 0
U2 26
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0894-8755
EI 1520-0442
J9 J CLIMATE
JI J. Clim.
PD SEP
PY 2013
VL 26
IS 17
BP 6439
EP 6458
DI 10.1175/JCLI-D-12-00376.1
PG 20
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 205AK
UT WOS:000323412300014
ER
PT J
AU Feldman, DR
Coleman, DM
Collins, WD
AF Feldman, Daniel R.
Coleman, Daniel M.
Collins, William D.
TI On the Usage of Spectral and Broadband Satellite Instrument Measurements
to Differentiate Climate Models with Different Cloud Feedback Strengths
SO JOURNAL OF CLIMATE
LA English
DT Article
DE Feedback; Radiances; Satellite observations; Time series; Cloud
parameterizations; Model comparison
ID VERSION-3 CCSM3; SENSITIVITY; RADIANCE; SYSTEM; SPACE; BENCHMARK;
TRENDS; DECADE
AB Top-of-atmosphere radiometric signals associated with different high- and low-cloud-radiative feedbacks have been examined through the use of an observing system simulation experiment (OSSE). The OSSE simulates variations in the spectrally resolved and spectrally integrated signals that are due to a range of plausible feedbacks of the climate system when forced with CO2 concentrations that increase at 1% yr(-1). This initial version of the OSSE is based on the Community Climate System Model, version 3 (CCSM3), and exploits the fact that CCSM3 exhibits different cloud feedback strengths for different model horizontal resolutions. In addition to the conventional broadband shortwave albedos and outgoing longwave fluxes, a dataset of shortwave spectral reflectance and longwave spectral radiance has been created. These data have been analyzed to determine simulated satellite instrument signals of poorly constrained cloud feedbacks for three plausible realizations of Earth's climate system produced by CCSM3. These data have been analyzed to estimate the observational record length of albedo, outgoing longwave radiation, shortwave reflectance, or longwave radiance required to differentiate these dissimilar Earth system realizations. Shortwave spectral measurements in visible and near-infrared water vapor overtone lines are best suited to differentiate model results, and a 33% difference in shortwave-cloud feedbacks can be detected with 20 years of continuous measurements. Nevertheless, at most latitudes and with most wavelengths, the difference detection time is more than 30 years. This suggests that observing systems of sufficiently stable calibration would be useful in addressing the contribution of low clouds to the spread of climate sensitivities currently exhibited by the models that report to the Intergovernmental Panel on Climate Change (IPCC).
C1 [Feldman, Daniel R.; Collins, William D.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
[Coleman, Daniel M.; Collins, William D.] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
RP Feldman, DR (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd,MS 50A4037, Berkeley, CA 94720 USA.
EM drfeldman@lbl.gov
RI Feldman, Daniel/N-8703-2013; Collins, William/J-3147-2014; Richards,
Amber/K-8203-2015
OI Feldman, Daniel/0000-0003-3365-5233; Collins,
William/0000-0002-4463-9848;
FU NASA [NNX11AE65G]; Contractor Supporting Research (CSR) from Berkeley
Lab by Office of Science, of the U.S. Department of Energy
[DE-AC02-05CH11231]; NASA High-End Computing Grant [SMD-10-1799]
FX Funding for this research was supported by the NASA Grant NNX11AE65G.
This work was also supported by Contractor Supporting Research (CSR)
funding from Berkeley Lab, provided by the Director, Office of Science,
of the U.S. Department of Energy under Contract DE-AC02-05CH11231.
Additionally, NASA High-End Computing Grant SMD-10-1799 allotted
computational resources to produce the simulations. The following
individuals also provided considerable assistance with this research:
David Young, Bruce Wielicki, and Rosemary Baize of the NASA Langley
Research Center; Chris Paciorek, Chris Little, and Tsengdar Lee of the
NASA Science Mission Directorate; and the entire NASA High-End Computing
technical support team of NASA User Services. We also acknowledge the
invaluable feedback from two anonymous peer-reviewers.
NR 34
TC 2
Z9 2
U1 0
U2 13
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0894-8755
J9 J CLIMATE
JI J. Clim.
PD SEP
PY 2013
VL 26
IS 17
BP 6561
EP 6574
DI 10.1175/JCLI-D-12-00378.1
PG 14
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 205AK
UT WOS:000323412300021
ER
PT J
AU Tanaka, T
Nagao, Y
Mochinaga, T
Saito, K
Guo, QX
Nishio, M
Yu, KM
Walukiewicz, W
AF Tanaka, Tooru
Nagao, Yasuhiro
Mochinaga, Tomohiro
Saito, Katsuhiko
Guo, Qixin
Nishio, Mitsuhiro
Yu, Kin M.
Walukiewicz, Wladek
TI Molecular beam epitaxial growth of ZnCdTeO epilayers for intermediate
band solar cells
SO JOURNAL OF CRYSTAL GROWTH
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Molecular Beam Epitaxy (MBE)
CY SEP 23-28, 2012
CL Nara, JAPAN
DE Molecular beam epitaxy; Highly mismatched alloy; Semiconducting II-VI
materials; Intermediate band solar cells
ID OPTICAL-PROPERTIES; ALLOYS; SPECTROSCOPY; ZNTE
AB We report the growth and characterization of the lattice-matched Zn1-xCdxTe1-yOy(ZnCdTeO) layers on ZnTe substrates by radio frequency plasma-assisted molecular beam epitaxy technique. The Cd composition increases linearly with increasing Cd/(Zn+Cd) flux ratio, indicating a controllability of Cd composition by Cd flux. Introduction of O radical during the growth of ZnCdTe resulted in the formation of ZnCdTeO layer. At particular O and Cd compositions lattice-matched ZnCdTeO epilayers on ZnTe substrate were obtained. Photoreflectance (PR) spectroscopy on the lattice-matched ZnCdTeO layer revealed two distinct PR features in the energy regions at 2.2-2.5 eV and 1.5-1.8 eV, which can be attributed to transitions from the valence band to the two conduction subbands, E+ and E-, respectively. (c) 2013 Elsevier B.V. All rights reserved.
C1 [Tanaka, Tooru; Nagao, Yasuhiro; Mochinaga, Tomohiro; Saito, Katsuhiko; Guo, Qixin; Nishio, Mitsuhiro] Saga Univ, Dept Elect & Elect Engn, Saga 8408502, Japan.
[Tanaka, Tooru] Japan Sci & Technol Agcy JST, PRESTO, Kawaguchi, Saitama 3320012, Japan.
[Yu, Kin M.; Walukiewicz, Wladek] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Tanaka, T (reprint author), Saga Univ, Dept Elect & Elect Engn, 1 Honjo, Saga 8408502, Japan.
EM ttanaka@cc.saga-u.ac.jp
OI Tanaka, Tooru/0000-0001-5747-1717; Yu, Kin Man/0000-0003-1350-9642
NR 19
TC 5
Z9 5
U1 1
U2 25
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-0248
J9 J CRYST GROWTH
JI J. Cryst. Growth
PD SEP 1
PY 2013
VL 378
BP 259
EP 262
DI 10.1016/j.jcrysgro.2012.12.086
PG 4
WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied
SC Crystallography; Materials Science; Physics
GA 204HJ
UT WOS:000323355900066
ER
PT J
AU Kajimoto, M
Priddy, CMO
Ledee, DR
Xu, C
Isern, N
Olson, AK
Portman, MA
AF Kajimoto, Masaki
Priddy, Colleen M. O'Kelly
Ledee, Dolena R.
Xu, Chun
Isern, Nancy
Olson, Aaron K.
Portman, Michael A.
TI Extracorporeal membrane oxygenation promotes long chain fatty acid
oxidation in the immature swine heart in vivo
SO JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY
LA English
DT Article
DE Extracorporeal membrane oxygenation; Immature heart; Fatty acid
oxidation; Nuclear magnetic resonance; Substrate metabolism
ID MECHANICAL CIRCULATORY SUPPORT; PYRUVATE-DEHYDROGENASE KINASE;
GENE-EXPRESSION; LIFE-SUPPORT; CARDIOPULMONARY BYPASS; CONTRACTILE
FUNCTION; CARDIAC-HYPERTROPHY; PROTEIN-METABOLISM; SKELETAL-MUSCLE;
MALONYL-COA
AB Extracorporeal membrane oxygenation (ECMO) supports infants and children with severe cardiopulmonary compromise. Nutritional support for these children includes provision of medium- and long-chain fatty acids (FAs). However, ECM induces a stress response, which could limit the capacity for FA oxidation. Metabolic impairment could induce new or exacerbate existing myocardial dysfunction. Using a clinically relevant piglet model, we tested the hypothesis that ECM maintains the myocardial capacity for FA oxidation and preserves myocardial energy state. Provision of 13-Carbon labeled medium-chain FA (octanoate), long-chain free FAs (LCFAs), and lactate into systemic circulation showed that ECM promoted relative increases in myocardial LCFA oxidation while inhibiting lactate oxidation. Loading of these labeled substrates at high dose into the left coronary artery demonstrated metabolic flexibility as the heart preferentially oxidized octanoate. ECM preserved this octanoate metabolic response, but also promoted LCFA oxidation and inhibited lactate utilization. Rapid upregulation of pyruvate dehydrogenase kinase-4 (PDK4) protein appeared to participate in this metabolic shift during ECMO. ECM also increased relative flux from lactate to alanine further supporting the role for pyruvate dehydrogenase inhibition by PDK4. High dose substrate loading during ECM() also elevated the myocardial energy state indexed by phosphocreatine to ATP ratio. ECM promotes LCFA oxidation in immature hearts, while maintaining myocardial energy state. These data support the appropriateness of FA provision during ECMO support for the immature heart (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Kajimoto, Masaki; Priddy, Colleen M. O'Kelly; Ledee, Dolena R.; Xu, Chun; Olson, Aaron K.; Portman, Michael A.] Seattle Childrens Res Inst, Ctr Dev Therapeut, Seattle, WA 98101 USA.
[Isern, Nancy] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
[Olson, Aaron K.; Portman, Michael A.] Univ Washington, Dept Pediat, Div Cardiol, Seattle, WA 98195 USA.
RP Portman, MA (reprint author), Seattle Childrens Res Inst, 1900 9th Ave, Seattle, WA 98101 USA.
EM michael.portman@seattlechildrens.org
RI Isern, Nancy/J-8016-2013;
OI Isern, Nancy/0000-0001-9571-8864
FU National Institutes of Health [R01HL60666]; Department of Energy's
Office of Biological and Environmental Research at Pacific Northwest
National Laboratory
FX This work was supported by the National Institutes of Health R01HL60666
to M. A. Portman. A portion of the research was performed using EMSL, a
national scientific user facility sponsored by the Department of
Energy's Office of Biological and Environmental Research and located at
Pacific Northwest National Laboratory.
NR 53
TC 10
Z9 10
U1 0
U2 6
PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0022-2828
EI 1095-8584
J9 J MOL CELL CARDIOL
JI J. Mol. Cell. Cardiol.
PD SEP
PY 2013
VL 62
BP 144
EP 152
DI 10.1016/j.yjmcc.2013.05.014
PG 9
WC Cardiac & Cardiovascular Systems; Cell Biology
SC Cardiovascular System & Cardiology; Cell Biology
GA 198RV
UT WOS:000322940900019
PM 23727393
ER
PT J
AU Bezrukov, F
Kartavtsev, A
Lindner, M
AF Bezrukov, F.
Kartavtsev, A.
Lindner, M.
TI Leptogenesis in models with keV sterile neutrino dark matter
SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
LA English
DT Article
ID BARYON ASYMMETRY; UNIVERSE; BARYOGENESIS; CONSTRAINTS
AB We analyze leptogenesis in gauge extensions of the Standard Model with keV sterile neutrino dark matter. We find that both the observed dark matter abundance and the correct baryon asymmetry of the Universe can simultaneously emerge in these models. Both the dark matter abundance and the leptogenesis are controlled by the out-of-equilibrium decays of the same heavy right-handed neutrino.
C1 [Bezrukov, F.] Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
[Bezrukov, F.] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA.
[Bezrukov, F.] Univ Munich, D-80333 Munich, Germany.
[Kartavtsev, A.; Lindner, M.] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
RP Bezrukov, F (reprint author), Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
EM fedor.bezrukov@uconn.edu; alexander.kartavtsev@mpi-hd.mpg.de;
manfred.lindner@mpi-hd.mpg.de
OI Bezrukov, Fedor/0000-0003-3601-1003; Lindner,
Manfred/0000-0002-3704-6016
FU Humboldt foundation; DFG [KA-3274/1-1]
FX The work of FB was partially supported by the Humboldt foundation. AK is
supported by DFG under grant KA-3274/1-1 'Systematic analysis of
baryogenesis in non-equilibrium quantum field theory'.
NR 29
TC 6
Z9 6
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0954-3899
J9 J PHYS G NUCL PARTIC
JI J. Phys. G-Nucl. Part. Phys.
PD SEP
PY 2013
VL 40
IS 9
AR 095202
DI 10.1088/0954-3899/40/9/095202
PG 8
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 201IZ
UT WOS:000323135200016
ER
PT J
AU Jimenez-Delgado, P
Melnitchouk, W
Owens, JF
AF Jimenez-Delgado, P.
Melnitchouk, W.
Owens, J. F.
TI Parton momentum and helicity distributions in the nucleon
SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
LA English
DT Review
ID DEEP-INELASTIC-SCATTERING; NEUTRON SPIN STRUCTURE; DEPENDENT
STRUCTURE-FUNCTION; STRUCTURE FUNCTIONS G(1)(P); ELECTRON-PROTON
SCATTERING; INTRINSIC CHARM COMPONENT; STRUCTURE FUNCTIONS G(2); HEAVY
FLAVOR PRODUCTION; DRELL-YAN PROCESS; LIGHT-QUARK SEA
AB We review the current status of spin-averaged and spin-dependent parton distribution functions (PDFs) of the nucleon. After presenting the formalism used to fit PDFs in modern global data analyses, we discuss constraints placed on the PDFs by specific data types. We give representative examples of unpolarized and polarized PDFs and their errors, and list open questions in global quantum chromodynamics fitting. Finally, we anticipate how future facilities, with fixed-target and collider experiments, may impact our knowledge of PDFs and reduce their uncertainties.
C1 [Jimenez-Delgado, P.; Melnitchouk, W.] Jefferson Lab, Newport News, VA 23606 USA.
[Owens, J. F.] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA.
RP Jimenez-Delgado, P (reprint author), Jefferson Lab, Newport News, VA 23606 USA.
EM wmelnitc@jlab.org
FU DOE under which Jefferson Science Associates, LLC operates Jefferson Lab
[DE-AC05-06OR23177]; DOE [DE-FG02-13ER41942]
FX We thank A Accardi and K Griffioen for helpful comments and a careful
reading of the manuscript. The work of PJ-D and WM was supported by DOE
contract no. DE-AC05-06OR23177, under which Jefferson Science
Associates, LLC operates Jefferson Lab. The work of JFO was supported by
DOE contract no. DE-FG02-13ER41942.
NR 266
TC 26
Z9 26
U1 0
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0954-3899
EI 1361-6471
J9 J PHYS G NUCL PARTIC
JI J. Phys. G-Nucl. Part. Phys.
PD SEP
PY 2013
VL 40
IS 9
AR 093102
DI 10.1088/0954-3899/40/9/093102
PG 51
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 201IZ
UT WOS:000323135200002
ER
PT J
AU Wang, HX
Yoda, Y
Dong, WB
Huang, SPD
AF Wang, Hongxin
Yoda, Yoshitaka
Dong, Weibing
Huang, Songping D.
TI Energy calibration issues in nuclear resonant vibrational spectroscopy:
observing small spectral shifts and making fast calibrations
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE nuclear resonant vibrational spectroscopy; high-resolution
monochromator; in situ energy calibration; quick-switching energy
calibration; small energy shift; energy scale; energy position
ID NORMAL-MODE ANALYSIS; SCATTERING BEAMLINE; FEMO-COFACTOR; RAMAN;
CLUSTER; NRVS; HYDROGENASE; NITROGENASE; SPRING-8; SITE
AB The conventional energy calibration for nuclear resonant vibrational spectroscopy (NRVS) is usually long. Meanwhile, taking NRVS samples out of the cryostat increases the chance of sample damage, which makes it impossible to carry out an energy calibration during one NRVS measurement. In this study, by manipulating the 14.4 keV beam through the main measurement chamber without moving out the NRVS sample, two alternative calibration procedures have been proposed and established: (i) an in situ calibration procedure, which measures the main NRVS sample at stage A and the calibration sample at stage B simultaneously, and calibrates the energies for observing extremely small spectral shifts; for example, the 0.3 meV energy shift between the 100%-Fe-57-enriched [Fe4S4Cl4](=) and 10%-Fe-57 and 90%-Fe-54 labeled [Fe4S4Cl4](=) has been well resolved; (ii) a quick-switching energy calibration procedure, which reduces each calibration time from 3-4 h to about 30 min. Although the quick-switching calibration is not in situ, it is suitable for normal NRVS measurements.
C1 [Wang, Hongxin; Dong, Weibing] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA.
[Wang, Hongxin] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Yoda, Yoshitaka] JASRI, Sayo, Hyogo 6795198, Japan.
[Dong, Weibing] Liaoning Normal Univ, Liaoning Prov Key Lab Biotechnol & Drug Discovery, Dalian 116081, Peoples R China.
[Huang, Songping D.] Kent State Univ, Dept Chem & Biochem, Kent, OH 44242 USA.
RP Wang, HX (reprint author), Univ Calif Davis, Dept Chem, 1 Shields Ave, Davis, CA 95616 USA.
EM hxwang2@lbl.gov
FU NIH [GM-65440, EB-001962]; DOE Office of Biological and Environmental
Research; NIH-NCI [1R21CA143408-01A1]
FX This work was funded by NIH grants GM-65440, EB-001962, and the DOE
Office of Biological and Environmental Research (all to Professor
Stephen P. Cramer at UC Davis). The work at Kent State University was
supported by NIH-NCI (1R21CA143408-01A1, to SDH). NRVS spectra were
measured at SPring-8 BL09XU with the approval of JASRI (Proposal No.
2011A/B0032 and 2012A/B0032). We also thank Professor Cramer (at UC
Davis) for the overall support, Dr Ilya Sergeev/Dr Aleksandr Chumakov
(at ESRF/ID18) for assistance in obtaining the
[MgFe(CN)6]= NRVS, and Dr Jiyong Zhao (at APS
03ID) for discussion on HRM calibrations.
NR 23
TC 2
Z9 2
U1 0
U2 8
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD SEP
PY 2013
VL 20
BP 683
EP 690
DI 10.1107/S0909049513021201
PN 5
PG 8
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 203HN
UT WOS:000323282800002
PM 23955030
ER
PT J
AU Pompidor, G
Dworkowski, FSN
Thominet, V
Schulze-Briese, C
Fuchs, MR
AF Pompidor, Guillaume
Dworkowski, Florian S. N.
Thominet, Vincent
Schulze-Briese, Clemens
Fuchs, Martin R.
TI A new on-axis micro-spectrophotometer for combining Raman, fluorescence
and UV/Vis absorption spectroscopy with macromolecular crystallography
at the Swiss Light Source
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE macromolecular crystallography; single-crystal spectroscopy;
micro-spectrophotometry; complementary techniques; Raman spectroscopy
ID X-RAY CRYSTALLOGRAPHY; RESONANCE RAMAN; RADIATION-DAMAGE; PROTEIN
CRYSTALLOGRAPHY; BIOLOGICAL CRYSTALS; BEAMLINE X26-C; MYOGLOBIN;
COMPLEX; INTERMEDIATE; MICROSPECTROPHOTOMETER
AB The combination of X-ray diffraction experiments with optical methods such as Raman, UV/Vis absorption and fluorescence spectroscopy greatly enhances and complements the specificity of the obtained information. The upgraded version of the in situ on-axis micro-spectrophotometer, MS2, at the macromolecular crystallography beamline X10SA of the Swiss Light Source is presented. The instrument newly supports Raman and resonance Raman spectroscopy, in addition to the previously available UV/Vis absorption and fluorescence modes. With the recent upgrades of the spectral bandwidth, instrument stability, detection efficiency and control software, the application range of the instrument and its ease of operation were greatly improved. Its on-axis geometry with collinear X-ray and optical axes to ensure optimal control of the overlap of sample volumes probed by each technique is still unique amongst comparable facilities worldwide and the instrument has now been in general user operation for over two years.
C1 [Pompidor, Guillaume; Dworkowski, Florian S. N.; Thominet, Vincent; Fuchs, Martin R.] Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
[Schulze-Briese, Clemens] DECTRIS Ltd, CH-5400 Baden, Switzerland.
RP Fuchs, MR (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM mfuchs@bnl.gov
OI Dworkowski, Florian/0000-0001-5004-8684
FU PSI Forschungskommission; Max Planck Gesellschaft; Novartis; F.
Hoffman-La Roche
FX The authors would like to thank Alke Meents (DESY), Robin Owen (DLS) and
Arwen Pearson (University of Leeds) for inspiration and helpful input
and discussions. The presented work would have been impossible without
the support by Jose Gabadinho, Ezequiel Panepucci, Claude Pradervand,
Jorg Schneider, Roman Schneider, Takashi Tomizaki and the rest of the
SLS MX-Group. Funding was provided by a PSI Forschungskommission grant
as well as the X10SA beamline partners Max Planck Gesellschaft, Novartis
and F. Hoffman-La Roche.
NR 54
TC 9
Z9 9
U1 0
U2 15
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD SEP
PY 2013
VL 20
BP 765
EP 776
DI 10.1107/S0909049513016063
PN 5
PG 12
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 203HN
UT WOS:000323282800013
PM 23955041
ER
PT J
AU Roessler, CG
Kuczewski, A
Stearns, R
Ellson, R
Olechno, J
Orville, AM
Allaire, M
Soares, AS
Heroux, A
AF Roessler, Christian G.
Kuczewski, Anthony
Stearns, Richard
Ellson, Richard
Olechno, Joseph
Orville, Allen M.
Allaire, Marc
Soares, Alexei S.
Heroux, Annie
TI Acoustic methods for high-throughput protein crystal mounting at
next-generation macromolecular crystallographic beamlines
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE acoustic droplet ejection; conveyor belt; crystal mounting; high
throughput; X-ray diffraction; macromolecular crystallography
ID X-RAY-DIFFRACTION; INTEGRATED SOFTWARE; DATA-COLLECTION;
CRYSTALLIZATION; OPTIMIZATION; SYSTEM
AB To take full advantage of advanced data collection techniques and high beam flux at next-generation macromolecular crystallography beamlines, rapid and reliable methods will be needed to mount and align many samples per second. One approach is to use an acoustic ejector to eject crystal-containing droplets onto a solid X-ray transparent surface, which can then be positioned and rotated for data collection. Proof-of-concept experiments were conducted at the National Synchrotron Light Source on thermolysin crystals acoustically ejected onto a polyimide 'conveyor belt'. Small wedges of data were collected on each crystal, and a complete dataset was assembled from a well diffracting subset of these crystals. Future developments and implementation will focus on achieving ejection and translation of single droplets at a rate of over one hundred per second.
C1 [Roessler, Christian G.; Kuczewski, Anthony; Orville, Allen M.; Allaire, Marc; Soares, Alexei S.; Heroux, Annie] Brookhaven Natl Lab, Photon Sci Directorate, Upton, NY 11973 USA.
[Stearns, Richard; Ellson, Richard; Olechno, Joseph] Labcyte Inc, Sunnyvale, CA 94089 USA.
[Orville, Allen M.] Brookhaven Natl Lab, Dept Biosci, Upton, NY 11973 USA.
RP Soares, AS (reprint author), Brookhaven Natl Lab, Photon Sci Directorate, Upton, NY 11973 USA.
EM soares@bnl.gov; heroux@bnl.gov
RI Soares, Alexei/F-4800-2014
OI Soares, Alexei/0000-0002-6565-8503
FU Brookhaven National Laboratory/US Department of Energy, Laboratory
Directed Research and Development [11-008]; DOE Office of Biological and
Environmental Research [FWP BO-70]; National Center for Research
Resources of the National Institutes of Health [2-P41-RR012408];
National Institute of General Medical Sciences [Y1 GM 0080-03]; DOE
Office of Basic Energy Sciences [DE-AC02-98CH10886]
FX Data for this study were measured at beamline X25 of the National
Synchrotron Light Source (NSLS). This work was supported by the
Brookhaven National Laboratory/US Department of Energy, Laboratory
Directed Research and Development grant 11-008, from the DOE Office of
Biological and Environmental Research (FWP BO-70) and from the National
Center for Research Resources of the National Institutes of Health
(2-P41-RR012408) and the National Institute of General Medical Sciences
(Grant Y1 GM 0080-03). The NSLS was supported by the DOE Office of Basic
Energy Sciences (DE-AC02-98CH10886). Author contributions: CGR, AMO, MA,
ASS and AH designed the experiment. CGR, AK, ASS and AH performed the
beamline experiments. RS, RE and JO provided critical information
relating to acoustic droplet ejection. CGR, ASS and AH analyzed the
data. All authors wrote the paper.
NR 26
TC 21
Z9 22
U1 1
U2 7
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD SEP
PY 2013
VL 20
BP 805
EP 808
DI 10.1107/S0909049513020372
PN 5
PG 4
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 203HN
UT WOS:000323282800018
PM 23955046
ER
PT J
AU Aubry, S
Arsenlis, A
AF Aubry, S.
Arsenlis, A.
TI Use of spherical harmonics for dislocation dynamics in anisotropic
elastic media
SO MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
LA English
DT Article
ID GREENS FUNCTIONS
AB Large-scale dislocation dynamics simulations usually involve several millions of interacting dislocation segments. The stress at a point and interaction force between two segments need to be computed many times during simulations. We evaluate the cost versus accuracy of using spherical harmonics series to approximate the anisotropic elastic Green's function in calculating stresses and forces between segments. The stress at a point is obtained by analytically integrating the spherical harmonics series once and the forces by integrating it analytically twice. We analyze the convergence and cost of using this approach and describe the elements of a fast implementation. We find that the cost of the force and stress calculations grows quadratically with the accuracy for a fixed anisotropy ratio.
C1 [Aubry, S.; Arsenlis, A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Aubry, S (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
FU US Department of Energy, National Nuclear Security Administration
[DE-AC52-07NA27344]
FX The Lawrence Livermore National Laboratory is operated by the Lawrence
Livermore National Security, LLC, for the US Department of Energy,
National Nuclear Security Administration, under Contract
DE-AC52-07NA27344.
NR 15
TC 6
Z9 6
U1 0
U2 9
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0965-0393
J9 MODEL SIMUL MATER SC
JI Model. Simul. Mater. Sci. Eng.
PD SEP
PY 2013
VL 21
IS 6
AR 065013
DI 10.1088/0965-0393/21/6/065013
PG 18
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA 203KF
UT WOS:000323290600014
ER
PT J
AU Homes, CC
Vogt, T
AF Homes, Christopher C.
Vogt, Thomas
TI COLOSSAL PERMITTIVITY MATERIALS Doping for superior dielectrics
SO NATURE MATERIALS
LA English
DT News Item
ID CONSTANT
C1 [Homes, Christopher C.] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
[Vogt, Thomas] Univ S Carolina, NanoCtr, Columbia, SC 29208 USA.
[Vogt, Thomas] Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA.
RP Homes, CC (reprint author), Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
EM homes@bnl.gov; tvogt@mailbox.sc.edu
NR 7
TC 17
Z9 17
U1 5
U2 111
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1476-1122
J9 NAT MATER
JI Nat. Mater.
PD SEP
PY 2013
VL 12
IS 9
BP 782
EP 783
PG 2
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 205CE
UT WOS:000323417600010
PM 23966049
ER
PT J
AU King, BA
Alam, S
Promoff, G
Arrazola, R
Dube, SR
AF King, Brian A.
Alam, Suhana
Promoff, Gabbi
Arrazola, Rene
Dube, Shanta R.
TI Awareness and Ever-Use of Electronic Cigarettes Among U.S. Adults,
2010-2011
SO NICOTINE & TOBACCO RESEARCH
LA English
DT Article
ID NICOTINE DELIVERY-SYSTEMS; TOBACCO; POLICY; SMOKE; RISE
AB Introduction: Electronic cigarettes, or e-cigarettes, were introduced into the U.S. market in recent years. However, little is known about the health impact of the product or the extent of its use. This study assessed the prevalence and correlates of awareness and ever-use of e-cigarettes among U.S. adults during 2010-2011.
Methods: Data were obtained from the HealthStyles survey, a national consumer-based survey of U.S. adults aged years old. In 2010, data collection for the HealthStyles survey was both mail-based (n = 4,184) and web-based (n = 2,505), and in 2011, web-based (n = 4,050) only. Estimates of awareness and ever-use of e-cigarettes were calculated overall and by sex, age, race/ethnicity, educational attainment, household income, region, and smoking status.
Results: In 2010, overall awareness of e-cigarettes was 38.5% (mail survey) and 40.9% (web survey); in 2011, awareness was 57.9% (web survey). Ever-use of e-cigarettes among all respondents was 2.1% in the 2010 mail survey, 3.3% in the 2010 web survey, and 6.2% in the 2011 web survey. Ever-use of e-cigarettes was significantly higher among current smokers compared with both former and never-smokers, irrespective of survey method or year. During 2010-2011, ever-use increased among both sexes, those aged 45-54 years, non-Hispanic Whites, those living in the South, and current and former smokers.
Conclusions: Awareness and ever-use of e-cigarettes increased among U.S. adults from 2010 to 2011. In 2011, approximately 1 in 5 current smokers reported having ever-used e-cigarettes. Continued surveillance of e-cigarettes is needed for public health planning.
C1 [King, Brian A.; Alam, Suhana; Promoff, Gabbi; Arrazola, Rene; Dube, Shanta R.] Ctr Dis Control & Prevent, Off Smoking & Hlth, Natl Ctr Chron Dis Prevent & Hlth Promot, Atlanta, GA 30341 USA.
[King, Brian A.] Ctr Dis Control & Prevent, Epidem Intelligence Serv, Div Appl Sci, Sci Educ & Profess Dev Program Off, Atlanta, GA 30341 USA.
[Alam, Suhana] Oak Ridge Inst Sci & Educ, Oak Ridge, TN USA.
RP King, BA (reprint author), Ctr Dis Control & Prevent, Off Smoking & Hlth, Natl Ctr Chron Dis Prevent & Hlth Promot, 4770 Buford Highway,MS K-50, Atlanta, GA 30341 USA.
EM baking@cdc.gov
FU U.S. Department of Energy; CDC [DE-AC05-06OR23100]
FX This project was supported in part by an appointment to the Research
Participation Program at the Centers for Disease Control and Prevention
(CDC) administered by the Oak Ridge Institute for Science and Education
through an interagency agreement between the U.S. Department of Energy
and the CDC (Grant DE-AC05-06OR23100).
NR 27
TC 201
Z9 203
U1 2
U2 52
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 1462-2203
J9 NICOTINE TOB RES
JI Nicotine Tob. Res.
PD SEP
PY 2013
VL 15
IS 9
BP 1623
EP 1627
DI 10.1093/ntr/ntt013
PG 5
WC Substance Abuse; Public, Environmental & Occupational Health
SC Substance Abuse; Public, Environmental & Occupational Health
GA 202CM
UT WOS:000323191100018
PM 23449421
ER
PT J
AU Wen, J
Gao, C
Li, YH
Wang, YQ
Zhang, LM
Hu, BT
Chen, LJ
Su, X
AF Wen, J.
Gao, C.
Li, Y. H.
Wang, Y. Q.
Zhang, L. M.
Hu, B. T.
Chen, L. J.
Su, X.
TI Ion irradiation induced order-to-disorder transformation in delta-phase
Lu4Hf3O12
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article
DE Ion irradiation; delta-Lu4Hf3O12; Order-to-disorder transformation
ID NUCLEAR-WASTE; PLUTONIUM DISPOSITION; RADIATION TOLERANCE; CERAMIC
INSULATORS; DELTA-SC4ZR3O12; IMMOBILIZATION; ACTINIDES; SPECTRUM;
OXIDES; FORM
AB In this study, polycrystalline delta-phase Lu4Hf3O12 was irradiated with 6 MeV Xe26+ ions to fluences ranging from 2 x 10(13) to 1 x 10(15) ions/cm(2). Ion irradiation-induced microstructural evolution was examined by using grazing incidence X-ray diffraction (GIXRD). A complete phase transformation from ordered rhombohedral to disordered fluorite (O-D) was observed by a fluence of 1 x 10(15) ions/cm(2), equivalent to a peak ballistic damage dose of similar to 3.49 displacements per atom (dpa). To research the different irradiation effect between light ion and heavy ion on delta-Lu4Hf3O12, 400 keV Ne2+ ions were implanted to ion fluences ranging from 1 x 10(14) to 1 x 10(15) ions/cm(2). A complete O-D crystal structure transformation was observed by a fluence of 5 x 10(14) ions/cm(2) (similar to 0.22 dpa). This threshold dose was found to be observably lower than the threshold dose to produce order-to-disorder transformation using Xe26+ ions on delta-Lu4Hf3O12. This suggests that heavy ions are less efficient than light ions in producing the retained defects that are responsible for the O-D transformation. The theoretical calculations show that the O-D transformation of delta-phase was attributed to the anion oxygen Frenkel pair defect. The ion irradiation-induced transformation of delta-phase Lu4Hf3O12 into disordered fluorite structure observed here is also discussed in relation to the temperature-composition (T-C) phase diagrams for the compound. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Wen, J.; Gao, C.; Li, Y. H.; Zhang, L. M.; Hu, B. T.; Chen, L. J.; Su, X.] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China.
[Wang, Y. Q.] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Li, YH (reprint author), Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China.
EM liyuhong@lzu.edu.cn
FU National Natural Science Foundation of China [11175076, 10975065,
91026021, 11135002]; U.S Department of Energy (DOE), Office of Basic
Energy Sciences (OBES), Division of Materials Sciences and Engineering
FX This work was sponsored by the National Natural Science Foundation of
China (11175076, 10975065, 91026021 and 11135002). The work also
sponsored by the U.S Department of Energy (DOE), Office of Basic Energy
Sciences (OBES), Division of Materials Sciences and Engineering. The
author wishes to thank the operators of the 320 kV platform for
multi-discipline research with highly charged ions at the Institute of
Modern Physics, CAS.
NR 26
TC 0
Z9 0
U1 2
U2 12
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD SEP 1
PY 2013
VL 310
BP 1
EP 5
DI 10.1016/j.nimb.2013.04.055
PG 5
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 203NE
UT WOS:000323299100001
ER
PT J
AU Salvadori, MC
Teixeira, FS
Sgubin, LG
Cattani, M
Brown, IG
AF Salvadori, M. C.
Teixeira, F. S.
Sgubin, L. G.
Cattani, M.
Brown, I. G.
TI Electrical conductivity of gold-implanted alumina nanocomposite
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article
DE Conducting ceramic; Metal ion implantation; Surface conductivity;
Percolation
ID DYNAMIC COMPOSITION CHANGES; METAL-ION IMPLANTATION; FILTERED
VACUUM-ARC; FILMS; NANOPARTICLES; DEPOSITION; SIMULATION; CERAMICS;
TRIDYN
AB We have carried out ion implantation of gold into alumina ceramic substrates and measured the surface resistivity as a function of implantation dose. The Au ion energy was 40 keV and the dose spanned the range 2.7-8.9 x 10(16) cm(-2). Imaging of the implanted material by transmission electron microscopy revealed that the implanted gold self-assembles into nanoparticles, thus forming a gold-alumina nanocomposite. The surface resistivity measurements were compared with the predictions of a model based on percolation theory, in which electron transport through the composite is explained by conduction through a random resistor network formed by the Au nanoparticles. The electrical conductivity of a composite, near the critical conductor-insulator transition, is given by sigma approximate to sigma(0)(x-x(c))(t), where sigma(0) is the saturation conductivity for which the material still remains a composite, x is the normalized metal atom concentration of the conducting phase, x(c) is the critical concentration, or percolation threshold and t is the critical exponent. Excellent agreement was found between the experimental results and the predictions of the theory, and the results are consistent with prior related (but more limited) work. The percolation dose was 4.4 x 10(16) cm(-2), and the critical exponent obtained was t = 1.4 +/- 0.1. We conclude that the conductivity process is due to percolation and that the contribution from tunneling conduction is negligible. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Salvadori, M. C.; Teixeira, F. S.; Sgubin, L. G.; Cattani, M.] Univ Sao Paulo, Inst Phys, BR-05314970 Sao Paulo, Brazil.
[Brown, I. G.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Salvadori, MC (reprint author), Univ Sao Paulo, Inst Phys, CP 66318, BR-05314970 Sao Paulo, Brazil.
EM mcsalvadori@if.usp.br
RI Cattani, Mauro/N-9749-2013; Teixeira, Fernanda/A-9395-2013; Salvadori,
Maria Cecilia/A-9379-2013
FU Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); Conselho
Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Brazil
FX This work was supported by the Fundacao de Amparo a Pesquisa do Estado
de Sao Paulo (FAPESP) and the Conselho Nacional de Desenvolvimento
Cientifico e Tecnologico (CNPq), Brazil. We are grateful to the
Institute of Ion Beam Physics and Materials Research at the
Forschungszentrum Dresden-Rossendorf, Germany, for the TRIDYN-FZR
computer simulation code.
NR 35
TC 6
Z9 6
U1 1
U2 20
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD SEP 1
PY 2013
VL 310
BP 32
EP 36
DI 10.1016/j.nimb.2013.05.024
PG 5
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 203NE
UT WOS:000323299100007
ER
PT J
AU Stoller, RE
Toloczko, MB
Was, GS
Certain, AG
Dwaraknath, S
Garner, FA
AF Stoller, R. E.
Toloczko, M. B.
Was, G. S.
Certain, A. G.
Dwaraknath, S.
Garner, F. A.
TI On the use of SRIM for computing radiation damage exposure
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article
DE SRIM code; dpa; Radiation dose
ID DISPLACEMENT DAMAGE; DEFECT PRODUCTION; IRRADIATION; SOLIDS; METALS;
RATES; ATOMS
AB The SRIM (formerly TRIM) Monte Carlo simulation code is widely used to compute a number of parameters relevant to ion beam implantation and ion beam processing of materials. It also has the capability to compute a common radiation damage exposure unit known as atomic displacements per atom (dpa). Since dpa is a standard measure of primary radiation damage production, most researchers who employ ion beams as a tool for inducing radiation damage in materials use SRIM to determine the dpa associated with their irradiations. The use of SRIM for this purpose has been evaluated and comparisons have been made with an internationally-recognized standard definition of dpa, as well as more detailed atomistic simulations of atomic displacement cascades. Differences between the standard and SRIM-based dpa are discussed and recommendations for future usage of SRIM in radiation damage studies are made. In particular, it is recommended that when direct comparisons between ion and neutron data are intended, the Kinchin-Pease option of SRIM should be selected. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Stoller, R. E.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Toloczko, M. B.; Certain, A. G.] Pacific NW Natl Lab, Richland, WA 99352 USA.
[Was, G. S.; Dwaraknath, S.] Univ Michigan, Ann Arbor, MI 48109 USA.
[Garner, F. A.] Radiat Effects Consulting, Richland, WA USA.
RP Stoller, RE (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
EM rkn@ornl.gov
OI Dwaraknath, Shyam/0000-0003-0289-2607
FU Office of Fusion Energy Sciences, U.S. Department of Energy
[DE-AC05-00OR22725]; UT-Battelle, LLC; U.S. Department of Energy Office
of Nuclear Energy
FX Research sponsored by the Office of Fusion Energy Sciences, U.S.
Department of Energy, under contract DE-AC05-00OR22725 with UT-Battelle,
LLC (RES), and by the U.S. Department of Energy Office of Nuclear Energy
Fuel Cycle Technology Program (MBZ).
NR 32
TC 167
Z9 169
U1 11
U2 129
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
EI 1872-9584
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD SEP 1
PY 2013
VL 310
BP 75
EP 80
DI 10.1016/j.nimb.2013.05.008
PG 6
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 203NE
UT WOS:000323299100011
ER
PT J
AU Kreyssig, A
Beutier, G
Hiroto, T
Kim, MG
Tucker, GS
de Boissieu, M
Tamura, R
Goldman, AI
AF Kreyssig, Andreas
Beutier, Guillaume
Hiroto, Takanobu
Kim, Min Gyu
Tucker, Gregory S.
de Boissieu, Marc
Tamura, Ryuji
Goldman, Alan I.
TI Antiferromagnetic order and the structural order-disorder transition in
the Cd6Ho quasicrystal approximant
SO PHILOSOPHICAL MAGAZINE LETTERS
LA English
DT Article
DE quasicrystal; approximant; antiferromagnetism; X-ray resonant magnetic
scattering
ID PHASE
AB It has generally been accepted that the orientational ordering of the Cd-4 tetrahedron within the Cd6R quasicrystal approximants is kinetically inhibited for R=Ho, Er, Tm and Lu by steric constraints. Our high-resolution X-ray scattering measurements of the Cd6Ho quasicrystal approximant, however, reveal an abrupt (first-order) transition to a monoclinic structure below T-S=178K for samples that have aged' at room temperature for approximately one year, reopening this question. Using X-ray resonant magnetic scattering at the Ho L-3-edge we have elucidated the nature of the antiferromagnetic ordering below T-N=8.5K in Cd6Ho. The magnetic Bragg peaks are found at the charge forbidden H+K+L=2n+1 positions, referenced to the high-temperature body-centred cubic structure. In general terms, this corresponds to antiferromagnetic arrangements of the Ho moments on adjacent clusters in the unit cell as previously found for Cd6Tb.
C1 [Kreyssig, Andreas; Kim, Min Gyu; Tucker, Gregory S.; Goldman, Alan I.] Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
[Kreyssig, Andreas; Kim, Min Gyu; Tucker, Gregory S.; Goldman, Alan I.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
[Beutier, Guillaume; de Boissieu, Marc] UMR 5266 CNRS Grenoble INP UJF, SIMaP, St Martin Dheres, France.
[Hiroto, Takanobu; Tamura, Ryuji] Tokyo Univ Sci, Dept Mat Sci & Technol, Noda, Chiba JP2788510, Japan.
RP Kreyssig, A (reprint author), Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
EM kreyssig@ameslab.gov; goldman@ameslab.gov
RI Kim, Min Gyu/B-8637-2012; Tucker, Gregory/L-9357-2013
OI Kim, Min Gyu/0000-0001-7676-454X; Tucker, Gregory/0000-0002-2787-8054
FU Department of Physics and Astronomy [DE-AC02-07CH11358]
FX The work as part of Andreas Kreyssig, Guillaume Beutier, Takanobu
Hiroto, Min Gyu Kim, Gregory S. Tucker, Marc de Boissieu, Ryuji Tamura
and Alan I. Goldman's official duties as Federal Government Contractors
is published by permission of the Ames Laboratory, U. S. DOE and
Department of Physics and Astronomy under Contract Number
DE-AC02-07CH11358. The US Government retains for itself, and others
acting on its behalf, a paid-up, non-exclusive, and irrevocable
worldwide license in said article to reproduce, prepare derivative
works, distribute copies to the public, and perform publicly and display
publicly, by or on behalf of the Government.
NR 17
TC 4
Z9 4
U1 2
U2 11
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0950-0839
J9 PHIL MAG LETT
JI Philos. Mag. Lett.
PD SEP 1
PY 2013
VL 93
IS 9
BP 512
EP 520
DI 10.1080/09500839.2013.815375
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 204ZL
UT WOS:000323409700003
ER
PT J
AU Xie, ZB
Xu, YP
Liu, G
Liu, Q
Zhu, JG
Tu, C
Amonette, JE
Cadisch, G
Yong, JWH
Hu, SJ
AF Xie, Zubin
Xu, Yanping
Liu, Gang
Liu, Qi
Zhu, Jianguo
Tu, Cong
Amonette, James E.
Cadisch, Georg
Yong, Jean W. H.
Hu, Shuijin
TI Impact of biochar application on nitrogen nutrition of rice,
greenhouse-gas emissions and soil organic carbon dynamics in two paddy
soils of China
SO PLANT AND SOIL
LA English
DT Article
DE Biochar; Greenhouse gases; Carbon sequestration; Nitrogen use
efficiency; Rice
ID OXIDE EMISSION; N2O EMISSIONS; METHANE EMISSION; WATER MANAGEMENT;
PLANT-GROWTH; FIELDS; CO2; FERTILIZERS; CH4; CHARCOAL
AB Two field microcosm experiments and N-15 labeling techniques were used to investigate the effects of biochar addition on rice N nutrition and GHG emissions in an Inceptisol and an Ultisol.
Biochar N bioavailability and effect of biochar on fertilizer nitrogen-use efficiency (NUE) were studied by N-15-enriched wheat biochar (7.8803 atom% N-15) and fertilizer urea (5.0026 atom% N-15) (Experiment I). Corn biochar and corn stalks were applied at 12 Mg ha(-1) to study their effects on GHG emissions (Experiment II).
Biochar had no significant impact on rice production and less than 2 % of the biochar N was available to plants in the first season. Biochar addition increased soil C and N contents and decreased urea NUE. Seasonal cumulative CH4 emissions with biochar were similar to the controls, but significantly lower than the local practice of straw amendment. N2O emissions with biochar were similar to the control in the acidic Ultisol, but significantly higher in the slightly alkaline Inceptisol. Carbon-balance calculations found no major losses of biochar-C.
Low bio-availability of biochar N did not make a significantly impact on rice production or N nutrition during the first year. Replacement of straw amendments with biochar could decrease CH4 emissions and increase SOC stocks.
C1 [Xie, Zubin; Xu, Yanping; Liu, Gang; Liu, Qi; Zhu, Jianguo] Chinese Acad Sci, Inst Soil Sci, Jiangsu Biochar Engn Ctr, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China.
[Xie, Zubin; Tu, Cong; Hu, Shuijin] N Carolina State Univ, Dept Plant Pathol, Soil Ecol Lab, Raleigh, NC 27695 USA.
[Xu, Yanping; Liu, Qi] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China.
[Amonette, James E.] Pacific NW Natl Lab, Chem & Mat Sci Div, Richland, WA 99352 USA.
[Cadisch, Georg] Univ Hohenheim, Inst Plant Prod & Agroecol Trop & Subtrop, D-70593 Stuttgart, Germany.
[Yong, Jean W. H.] Singapore Univ Technol & Design, Singapore 138682, Singapore.
RP Xie, ZB (reprint author), Chinese Acad Sci, Inst Soil Sci, Jiangsu Biochar Engn Ctr, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China.
EM zbxie@issas.ac.cn; wshxyp@126.com; gliu@issas.ac.cn; liuq@issas.ac.cn;
jgzhu@issas.ac.cn; congtu62@yahoo.com; jim.amonette@pnl.gov;
georg.cadisch@uni-hohenheim.de; jyong@sutd.edu.sg; shu4@ncsu.edu
FU Natural Science Foundation of China [41171191, 40871146]; Chinese
Academy of Sciences [KZCX2-YW-Q1-07, KZCX2-EW-409]; Ministry of Science
and Technology of China [2008BAD95B05]; Blue Moon Fund, USA
FX We wish to express our gratitude to the Natural Science Foundation of
China (41171191, 40871146), Chinese Academy of Sciences (KZCX2-YW-Q1-07,
KZCX2-EW-409), Ministry of Science and Technology of China
(2008BAD95B05) and Blue Moon Fund, USA for financial support. The
constructive comments of the two anonymous reviewers are highly
appreciated.
NR 58
TC 35
Z9 46
U1 20
U2 255
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0032-079X
J9 PLANT SOIL
JI Plant Soil
PD SEP
PY 2013
VL 370
IS 1-2
BP 527
EP 540
DI 10.1007/s11104-013-1636-x
PG 14
WC Agronomy; Plant Sciences; Soil Science
SC Agriculture; Plant Sciences
GA 202XG
UT WOS:000323253500039
ER
PT J
AU Pearman, BP
Mohajeri, N
Slattery, DK
Hampton, MD
Seal, S
Cullen, DA
AF Pearman, Benjamin P.
Mohajeri, Nahid
Slattery, Darlene K.
Hampton, Michael D.
Seal, Sudipta
Cullen, David A.
TI The chemical behavior and degradation mitigation effect of cerium oxide
nanoparticles in perfluorosulfonic acid polymer electrolyte membranes
SO POLYMER DEGRADATION AND STABILITY
LA English
DT Article
DE Cerium oxide; Perfluorosulfonic acid; Polymer electrolyte membrane
(PEM); Fuel cell; Fenton test; Degradation mitigation
ID PROTON-EXCHANGE MEMBRANE; FUEL-CELLS; RADICALS
AB Perfluorosulfonic acid membranes are susceptible to degradation during hydrogen fuel cell operation due to radical attack on the polymer chains. Mitigation of this attack by cerium-based radical scavengers is an approach that has shown promise. In this work, two formulations of crystalline cerium oxide nanoparticles, with an order of magnitude difference in particle size, are incorporated into said membranes and subjected to proton conductivity measurements and ex-situ durability tests. We found that ceria is reduced to Ce(III) ions in the acidic environment of a heated, humidified membrane which negatively impacts proton conductivity. In liquid and gas Fenton testing, fluoride emission is reduced by an order of magnitude, drastically increasing membrane longevity. Sideproduct analysis demonstrated that in the liquid Fenton test, the main point of attack is weak polymer end groups, while in the gas Fenton test, there is additional side-chain attack. Both mechanisms are mitigated by the addition of the ceria nanoparticles, whereby the extent of the concentration-dependent durability improvement is found to be independent of particle size. (C) 2013 Elsevier Ltd. All rights reserved.
C1 [Pearman, Benjamin P.; Mohajeri, Nahid; Slattery, Darlene K.] Univ Cent Florida, Florida Solar Energy Ctr, Cocoa, FL 32922 USA.
[Pearman, Benjamin P.; Hampton, Michael D.] Univ Cent Florida, Dept Chem, Orlando, FL 32816 USA.
[Seal, Sudipta] Univ Cent Florida, Dept Mech Mat & Aerosp Engn, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA.
[Cullen, David A.] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Mohajeri, N (reprint author), Univ Cent Florida, Florida Solar Energy Ctr, 1679 Clearlake Rd, Cocoa, FL 32922 USA.
EM nmohajeri@fsec.ucf.edu
RI Cullen, David/A-2918-2015
OI Cullen, David/0000-0002-2593-7866
FU DOE under the Florida Hydrogen Initiative [DE-FC36-04GO14225]; Oak Ridge
National Laboratory's ShaRE User Facility; Office of Basic Energy
Sciences, U.S. Department of Energy; Chemistry Department at the
University of Central Florida
FX The authors gratefully acknowledge funding from DOE under the Florida
Hydrogen Initiative, contract #DE-FC36-04GO14225. NMR support was
provided by Dr. David Richardson of the Chemistry Department at the
University of Central Florida and ceria synthesis and characterization
help by Dr. Ajay Karakoti. This research was supported by Oak Ridge
National Laboratory's ShaRE User Facility, which is sponsored by the
Office of Basic Energy Sciences, U.S. Department of Energy. Work was
performed at the Materials Characterization Facility of the University
of Central Florida with valuable instrumental and analytical help
provided by Mr. Kirk Scammon. Ion chromatography work was performed by
Mr. Peter Kubiak and Mr. Nicholas Miller. Thanks to J.M. Zuo and J.C.
Mabon for use of the web-based electron microscopy application software
Web-EMAPS, available at http://emaps.mrl.uiuc.edu/.
NR 33
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U1 1
U2 32
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0141-3910
J9 POLYM DEGRAD STABIL
JI Polym. Degrad. Stabil.
PD SEP
PY 2013
VL 98
IS 9
BP 1766
EP 1772
DI 10.1016/j.polymdegradstab.2013.05.025
PG 7
WC Polymer Science
SC Polymer Science
GA 205SD
UT WOS:000323464200028
ER
PT J
AU Der, BS
Jha, RK
Lewis, SM
Thompson, PM
Guntas, G
Kuhlman, B
AF Der, Bryan S.
Jha, Raamesh K.
Lewis, Steven M.
Thompson, Peter M.
Guntas, Gurkan
Kuhlman, Brian
TI Combined computational design of a zinc-binding site and a
protein-protein interaction: One open zinc coordination site was not a
robust hotspot for de novo ubiquitin binding (vol 81, pg 1245, 2013)
SO PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS
LA English
DT Correction
C1 [Der, Bryan S.; Jha, Raamesh K.; Lewis, Steven M.; Thompson, Peter M.; Guntas, Gurkan; Kuhlman, Brian] Univ N Carolina, Dept Biochem & Biophys, Chapel Hill, NC 27599 USA.
[Jha, Raamesh K.] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
[Kuhlman, Brian] Univ N Carolina, Lineberger Comprehens Canc Ctr, Chapel Hill, NC 27599 USA.
RP Kuhlman, B (reprint author), Univ N Carolina, Dept Biochem & Biophys, Chapel Hill, NC 27599 USA.
EM bkuhlman@email.unc.edu
OI Jha, Ramesh/0000-0001-5904-3441
NR 1
TC 0
Z9 0
U1 0
U2 5
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0887-3585
J9 PROTEINS
JI Proteins
PD SEP
PY 2013
VL 81
IS 9
BP 1678
EP 1678
DI 10.1002/prot.24379
PG 1
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 204RT
UT WOS:000323386900018
ER
PT J
AU Chen, X
Guo, S
Li, J
Zhang, GT
Lu, M
Shi, Y
AF Chen, Xi
Guo, Stephen
Li, Jinwei
Zhang, Guitao
Lu, Ming
Shi, Yong
TI Flexible piezoelectric nanofiber composite membranes as high performance
acoustic emission sensors
SO SENSORS AND ACTUATORS A-PHYSICAL
LA English
DT Article
DE Lead zirconate titanate (PZT); Nanofiber; Flexible electronics; Acoustic
emission (AE) sensor; Structural health monitoring (SHM)
ID FIBER COMPOSITES; PZT; NANOGENERATORS; TRANSDUCERS; ARRAYS; STRAIN;
DAMAGE
AB A flexible acoustic emission (AE) sensor based on lead zirconate titanate (PZT) nanofiber composite membrane is described. The PZT nanofibers, with diameters varying from 50 nm to 120 nm, were electrospun and aligned across interdigitated electrodes. After being packaged in a flexible polymer structure with a thickness of similar to 5 mu m, this small scale AE sensor can bend freely to follow curved surfaces or embedded into structures. High piezoelectric voltage constant, flexibility and mechanical strength of PZT nanfibers result in a high performance of the demonstrated AE sensor. Fundamental characterization indicates a spontaneous polarization of the PZT nanofibers without any polarization treatment. The electromechanical coupling effect was increased up to 370% after 90 min of polarization under an external electric field of similar to 3 V/mu m. The anisotropic sensitivity, which can reduce the required number of sensors to indentify the location of the AE source, was observed from the attenuation maps. The small scale, flexible and highly sensitive PZT nanofiber AE sensor opens up new applications for monitoring small scale structures, curved surfaces and even living cells. (c) 2013 Elsevier B.V. All rights reserved.
C1 [Chen, Xi; Guo, Stephen; Li, Jinwei; Zhang, Guitao; Shi, Yong] Stevens Inst Technol, Dept Mech Engn, Hoboken, NJ 07030 USA.
[Lu, Ming] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
RP Shi, Y (reprint author), Stevens Inst Technol, Dept Mech Engn, Hoboken, NJ 07030 USA.
EM xc2239@columbia.edu; yong.shi@stevens.edu
FU National Science Foundation [CMMI-0826418, ECCS-0802168]; U.S.
Department of Energy, Office of Basic Energy Sciences
[DE-AC02-98CH10886]
FX This work was supported in part by the National Science Foundation
(Award No. CMMI-0826418 & No. ECCS-0802168). Research carried out in
part at the Center for Functional Nanomaterials, Brookhaven National
Laboratory, which is supported by the U.S. Department of Energy, Office
of Basic Energy Sciences, under Contract No. DE-AC02-98CH10886. The
authors would also like to thank Sibo Li for the help of annealing
process.
NR 35
TC 8
Z9 8
U1 3
U2 61
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0924-4247
J9 SENSOR ACTUAT A-PHYS
JI Sens. Actuator A-Phys.
PD SEP 1
PY 2013
VL 199
BP 372
EP 378
DI 10.1016/j.sna.2013.06.011
PG 7
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 202RZ
UT WOS:000323238600051
ER
PT J
AU Qiu, DR
Wei, HH
Tu, QC
Yang, YF
Xie, M
Chen, JR
Pinkerton, MH
Liang, YL
He, ZL
Zhou, JZ
AF Qiu, Dongru
Wei, Hehong
Tu, Qichao
Yang, Yunfeng
Xie, Ming
Chen, Jingrong
Pinkerton, Mark H., Jr.
Liang, Yili
He, Zhili
Zhou, Jizhong
TI Combined Genomics and Experimental Analyses of Respiratory
Characteristics of Shewanella putrefaciens W3-18-1
SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID C-TYPE CYTOCHROME; PERIPLASMIC NITRATE REDUCTASE; ONEIDENSIS MR-1;
ANAEROBIC RESPIRATION; FUMARATE REDUCTASE; ESCHERICHIA-COLI;
PSEUDOMONAS-AERUGINOSA; GENUS SHEWANELLA; SYSTEMS BIOLOGY; SP. NOV
AB It has previously been shown that the Shewanella putrefaciens W3-18-1 strain produces remarkably high current in microbial fuel cells (MFCs) and can form magnetite at 0 degrees C. To explore the underlying mechanisms, we developed a genetic manipulation method by deleting the restriction-modification system genes of the SGI1 (Salmonella genome island 1)-like prophage and analyzed the key genes involved in bacterial respiration. W3-18-1 has less respiratory flexibility than the well-characterized S. oneidensis MR-1 strain, as it possesses fewer cytochrome c genes and lacks the ability to oxidize sulfite or reduce dimethyl sulfoxide (DMSO) and timethylamine oxide (TMAO). W3-18-1 lacks the hydrogen-producing Fe-only hydrogenase, and the hydrogen-oxidizing Ni-Fe hydrogenase genes were split into two separate clusters. Two periplasmic nitrate reductases (NapDAGHB and NapDABC) were functionally redundant in anaerobic growth of W3-18-1 with nitrate as the electron acceptor, though napDABC was not regulated by Crp. Moreover, nitrate respiration started earlier in W3-18-1 than in MR-1 (with NapDAGHB only) under microoxic conditions. These results indicate that Shewanella putrefaciens W3-18-1 is well adapted to habitats with higher oxygen levels. Taken together, the results of this study provide valuable insights into bacterial genome evolution.
C1 [Qiu, Dongru; Tu, Qichao; Xie, Ming; Chen, Jingrong; Pinkerton, Mark H., Jr.; Liang, Yili; He, Zhili; Zhou, Jizhong] Univ Oklahoma, Inst Environm Genom, Norman, OK 73019 USA.
[Qiu, Dongru; Tu, Qichao; Xie, Ming; Chen, Jingrong; Pinkerton, Mark H., Jr.; Liang, Yili; He, Zhili; Zhou, Jizhong] Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USA.
[Qiu, Dongru; Wei, Hehong] Chinese Acad Sci, Inst Hydrobiol, Wuhan, Peoples R China.
[Qiu, Dongru; Wei, Hehong] Chinese Acad Sci, Grad Univ, Wuhan, Peoples R China.
[Yang, Yunfeng] Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China.
[Yang, Yunfeng] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
RP Zhou, JZ (reprint author), Univ Oklahoma, Inst Environm Genom, Norman, OK 73019 USA.
EM jzhou@ou.edu
FU U.S. Department of Energy (DOE) [DE-FG02-07ER64383]; Chinese Academy of
Science [Y15103-1-401]; ENIGMA under the Office of Science, Office of
Biological and Environmental Research, of the U.S. Department of Energy
[DE-AC02-05CH11231]
FX This work was supported by U.S. Department of Energy (DOE) grant
DE-FG02-07ER64383 to J.Z.D.Q. and H.W. were partly supported by the
Chinese Academy of Science Grant Y15103-1-401 to D.Q. This work was also
supported by ENIGMA under contract DE-AC02-05CH11231 by the Office of
Science, Office of Biological and Environmental Research, of the U.S.
Department of Energy.
NR 42
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Z9 9
U1 3
U2 42
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0099-2240
J9 APPL ENVIRON MICROB
JI Appl. Environ. Microbiol.
PD SEP
PY 2013
VL 79
IS 17
BP 5250
EP 5257
DI 10.1128/AEM.00619-13
PG 8
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 197CZ
UT WOS:000322828100019
PM 23811511
ER
PT J
AU Goltsman, DSA
Dasari, M
Thomas, BC
Shah, MB
VerBerkmoes, NC
Hettich, RL
Banfield, JF
AF Goltsman, Daniela S. Aliaga
Dasari, Mauna
Thomas, Brian C.
Shah, Manesh B.
VerBerkmoes, Nathan C.
Hettich, Robert L.
Banfield, Jillian F.
TI New Group in the Leptospirillum Clade: Cultivation-Independent Community
Genomics, Proteomics, and Transcriptomics of the New Species
"Leptospirillum Group IV UBA BS"
SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID ACID-MINE DRAINAGE; ACIDOPHILIC MICROBIAL COMMUNITY; SP-NOV; IRON
MOUNTAIN; COPPER MINE; BACTERIA; FERROOXIDANS; ENVIRONMENT; RESISTANCE;
SEQUENCE
AB Leptospirillum spp. are widespread members of acidophilic microbial communities that catalyze ferrous iron oxidation, thereby increasing sulfide mineral dissolution rates. These bacteria play important roles in environmental acidification and are harnessed for bioleaching-based metal recovery. Known members of the Leptospirillum clade of the Nitrospira phylum are Leptospirillum ferrooxidans (group I), Leptospirillum ferriphilum and "Leptospirillum rubarum" (group II), and Leptospirillum ferrodiazotrophum (group III). In the Richmond Mine acid mine drainage (AMD) system, biofilm formation is initiated by L. rubarum; L. ferrodiazotrophum appears in later developmental stages. Here we used community metagenomic data from unusual, thick floating biofilms to identify distinguishing metabolic traits in a rare and uncultivated community member, the new species "Leptospirillum group IV UBA BS." These biofilms typically also contain a variety of Archaea, Actinobacteria, and a few other Leptospirillum spp. The Leptospirillum group IV UBA BS species shares 98% 16S rRNA sequence identity and 70% average amino acid identity between orthologs with its closest relative, L. ferrodiazotrophum. The presence of nitrogen fixation and reverse tricarboxylic acid (TCA) cycle proteins suggest an autotrophic metabolism similar to that of L. ferrodiazotrophum, while hydrogenase proteins suggest anaerobic metabolism. Community transcriptomic and proteomic analyses demonstrate expression of a multicopper oxidase unique to this species, as well as hydrogenases and core metabolic genes. Results suggest that the Leptospirillum group IV UBA BS species might play important roles in carbon fixation, nitrogen fixation, hydrogen metabolism, and iron oxidation in some acidic environments.
C1 [Goltsman, Daniela S. Aliaga; Dasari, Mauna; Thomas, Brian C.; Banfield, Jillian F.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Shah, Manesh B.; VerBerkmoes, Nathan C.; Hettich, Robert L.] Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP Goltsman, DSA (reprint author), Univ Calif Berkeley, Berkeley, CA 94720 USA.
EM dgoltsman@berkeley.edu
RI Hettich, Robert/N-1458-2016;
OI Hettich, Robert/0000-0001-7708-786X; Dasari, Mauna/0000-0002-1956-2500
FU U.S. Department of Energy [DE-FG02-05ER64134, DE-FG02-10ER64996]; NSF
GRFP
FX This research was supported by the U.S. Department of Energy through the
Genomic Sciences (DE-FG02-05ER64134) and Carbon-Cycling
(DE-FG02-10ER64996) programs. D. S. A. G. was supported by an NSF GRFP
fellowship.
NR 56
TC 17
Z9 17
U1 3
U2 43
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA
SN 0099-2240
J9 APPL ENVIRON MICROB
JI Appl. Environ. Microbiol.
PD SEP
PY 2013
VL 79
IS 17
BP 5384
EP 5393
DI 10.1128/AEM.00202-13
PG 10
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 197CZ
UT WOS:000322828100034
PM 23645189
ER
PT J
AU Lawrence, BA
Jackson, RD
Kucharik, CJ
AF Lawrence, Beth A.
Jackson, Randall D.
Kucharik, Christopher J.
TI Testing the stability of carbon pools stored in tussock sedge meadows
SO APPLIED SOIL ECOLOGY
LA English
DT Article
DE Carex stricta; C mineralization; Incubation; Methane; Restoration;
Wetland
ID LEAF-LITTER DECOMPOSITION; NITROGEN MINERALIZATION; METHANE PRODUCTION;
NORTHERN WETLANDS; SOIL RESPIRATION; CLIMATE-CHANGE; TEMPERATURE;
PEATLAND; DIOXIDE; VEGETATION
AB Tussocks formed by Carex stricta are a relatively large carbon (C) pool in sedge meadows, but the stability of organic matter in these ecosystems is not well understood. We initiated year-long incubation experiments (22.5 degrees C) to evaluate the CO2 and CH4 production potentials of sedge meadow substrates under field moist and inundated treatments from five sites in the Upper Midwest, USA (4 reference, I restored). C mineralization potentials decreased with depth (tussocks > underlying soil), and were positively correlated with macro-organic matter content and negatively with lignin. Across sites, C stored in tussocks and soil at the restoration was the least stable, suggesting that the restoration of C-storage function may take decades. Mineralization potentials were similar between field moist and inundated treatments, but inundation resulted in higher methane production, accounting for 24-51% of total carbon mineralized from tussocks. In the field however, C stricta tussocks emitted less methane (393 +/- 76 mg CH4 m(-2) d(-1)) than tussock interspaces (1362 +/- 371 mg CH4 m(-2) d(-1)) early in the growing season; we suggest that tussock tops oxidized methane produced from deeper anoxic horizons. Our results highlight the importance of considering how microtopography modulates greenhouse gas flux from wetlands and suggests that the C stored in the older, more decomposed C stricta tussock sedge meadow substrates (both within and between sites) is relatively stable. (C) 2013 Elsevier B.V. All rights reserved.
C1 [Lawrence, Beth A.] Univ Wisconsin Madison, Dept Bot, Madison, WI 53706 USA.
[Jackson, Randall D.; Kucharik, Christopher J.] Univ Wisconsin Madison, Dept Agron, Madison, WI 53706 USA.
[Jackson, Randall D.; Kucharik, Christopher J.] Univ Wisconsin Madison, US DOE, Great Lakes Bioenergy Res Ctr, Madison, WI 53706 USA.
[Kucharik, Christopher J.] Univ Wisconsin Madison, Ctr Sustainabil & Global Environm, Madison, WI 53706 USA.
RP Lawrence, BA (reprint author), De Paul Univ, Dept Environm Sci & Studies, 1110 West Belden Ave, Chicago, IL 60614 USA.
EM blawren6@depaul.edu
OI Kucharik, Christopher/0000-0002-0400-758X
FU NSF Doctoral Dissertation Improvement Grant [0909933]; Wetlands
Foundation; ON and EK Allen Fellowship
FX Research was supported in part by a NSF Doctoral Dissertation
Improvement Grant (#0909933), a Wetlands Foundation Travel Grant, and an
ON and EK Allen Fellowship to BAL. We thank the UW-Madison Arboretum,
Cherokee Marsh Conservation Park, Wisconsin DNR State Natural Areas, and
Wetlands Research, Inc. for access to research sites. Joy Zedler
provided insightful guidance during all phases of the project. We also
thank Gary Oates and Gregg Sanford for technical support, Cecile Ane for
statistical consultation, Tim Fahey and Joe Yavitt for insightful
advice, and constructive feedback from two anonymous reviewers.
NR 54
TC 2
Z9 2
U1 4
U2 45
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0929-1393
J9 APPL SOIL ECOL
JI Appl. Soil Ecol.
PD SEP
PY 2013
VL 71
BP 48
EP 57
DI 10.1016/j.apsoil.2013.05.007
PG 10
WC Soil Science
SC Agriculture
GA 198MF
UT WOS:000322926300007
ER
PT J
AU Hoagland, KC
Ruark, MD
Renz, MJ
Jackson, RD
AF Hoagland, Kolby C.
Ruark, Matthew D.
Renz, Mark J.
Jackson, Randall D.
TI Agricultural Management of Switchgrass for Fuel Quality and Thermal
Energy Yield on Highly Erodible Land in the Driftless Area of Southwest
Wisconsin
SO BIOENERGY RESEARCH
LA English
DT Article
DE Switchgrass; Highly erodible land; Nitrogen; Moisture; Ash; Chloride;
Thermal energy yield
ID BIOENERGY CROP PRODUCTION; BIOMASS YIELD; UNITED-STATES;
NITROGEN-FERTILIZATION; PANICUM-VIRGATUM; SOUTHERN IOWA; BIOFUELS;
HARVEST; USA; COMBUSTION
AB Converting row crop production to a perennial grass crop on highly erodible land has numerous benefits. Switchgrass, grown as a biofuel crop, can provide soil conservation benefits as a perennial crop and also provide economic value to the grower. However, little information exists regarding switchgrass management and production on these lands. The objectives of this study were to determine the effect of two management practices, nitrogen (N) fertilizer rate (0, 56, 112, 168, and 224 kg ha(-1)) and harvest timing (mid-fall, late-fall, and spring), on: (1) dry matter (DM) yield, (2) switchgrass quality components (moisture, ash, and chloride (Cl-) concentrations), and (3) combustion energy content and yield. The study was conducted in 2009 and 2010 on highly erodible lands in the Driftless Area of southwest Wisconsin. Results showed a positive response of switchgrass DM to N fertilizer, with no yield gain above 112 kg ha(-1) of N, although application of N increased Cl- concentrations. Harvest timing also affected switchgrass yield, with decreases in yield observed with progressively later harvest timings; this yield decrease was slightly greater compared with previous studies. Progressively later harvest timings led to a decrease in moisture, ash concentration, and Cl- concentration in both years. Energy content of switchgrass was not significantly affected by management. Energy yields, similar to DM yields, were maximized with 112 kg ha(-1) of N with a mid-fall harvest. The similarities between this study and other research indicate there is a universal response of switchgrass to N in the northern USA and yields determined in this study indicate that highly erodible lands in the Driftless Area can be used to produce switchgrass at regionally expected yields.
C1 [Hoagland, Kolby C.] BBI Int, Grand Forks, ND 58203 USA.
[Ruark, Matthew D.] Univ Wisconsin, Dept Soil Sci, Madison, WI 53706 USA.
[Renz, Mark J.; Jackson, Randall D.] Univ Wisconsin, Dept Agron, Madison, WI 53706 USA.
[Jackson, Randall D.] Univ Wisconsin, DOE Great Lakes Bioenergy Res Ctr, Madison, WI 53706 USA.
RP Ruark, MD (reprint author), Univ Wisconsin, Dept Soil Sci, 1525 Observ Dr, Madison, WI 53706 USA.
EM mdruark@wisc.edu
FU DOE Great Lakes Bioenergy Research Center (DOE Office of Science BER)
[DE-FC02-07ER64494]; State of Wisconsin's Office of Energy Independence;
USDA Hatch; University of Wisconsin-Madison [WIS01541]
FX This work was funded in part by the DOE Great Lakes Bioenergy Research
Center (DOE Office of Science BER DE-FC02-07ER64494), a grant by the
State of Wisconsin's Office of Energy Independence, and a grant from
USDA Hatch and University of Wisconsin-Madison (project No. WIS01541).
The authors would also like to recognize the contributions of Mack
Naber, Peter Wakeman, Anna Tapsieva, Julie Doll, Madeline Raudenbush,
and Jessica Miesel for their assistance on this project.
NR 41
TC 6
Z9 7
U1 1
U2 50
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1939-1234
J9 BIOENERG RES
JI BioEnergy Res.
PD SEP
PY 2013
VL 6
IS 3
BP 1012
EP 1021
DI 10.1007/s12155-013-9335-2
PG 10
WC Energy & Fuels; Environmental Sciences
SC Energy & Fuels; Environmental Sciences & Ecology
GA 197DU
UT WOS:000322830400016
ER
PT J
AU Otter, RR
Hayden, M
Mathews, T
Fortner, A
Bailey, FC
AF Otter, Ryan R.
Hayden, Mary
Mathews, Teresa
Fortner, Allison
Bailey, Frank C.
TI The use of tetragnathid spiders as bioindicators of metal exposure at a
coal ASH spill site
SO ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
LA English
DT Article
DE Spiders; Tetragnathid; Selenium; Mercury; Coal ash
ID SWALLOWS TACHYCINETA-BICOLOR; SELENIUM; BIOACCUMULATION; ACCUMULATION;
CONTAMINANTS; FISH; BIOAVAILABILITY; METHYLMERCURY; TENNESSEE; KINGSTON
AB On 22 December 2008, a dike containing coal fly ash from the Tennessee Valley Authority Kingston Fossil Fuel Plant (TN, USA) failed, resulting in the largest coal ash spill in US history. The present study was designed to determine sediment metal concentrations at multiple site locations and to determine whether site-specific bioaccumulation of metals existed in tetragnathid spiders. Selenium and nickel were the only 2 metals to exceed the US Environmental Protection Agency sediment screening levels. Selenium concentrations in spiders were significantly higher at ash-affected sites than in those from reference sites. The ratio of methylmercury to total mercury in spiders was found to be similar to that in other organisms (65-75%), which highlights the potential use of tetragnathid spiders as an indicator species for tracing contaminant transfer between the aquatic and terrestrial ecosystems. (C) 2013 SETAC
C1 [Otter, Ryan R.; Hayden, Mary; Bailey, Frank C.] Middle Tennessee State Univ, Dept Biol, Murfreesboro, TN 37130 USA.
[Mathews, Teresa] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
[Fortner, Allison] ARCADIS US, Knoxville, TN USA.
RP Otter, RR (reprint author), Middle Tennessee State Univ, Dept Biol, Murfreesboro, TN 37130 USA.
EM Ryan.Otter@mtsu.edu
FU Tennessee Valley Authority; Middle Tennessee State University's
Undergraduate Research Experience and Creative Activity Program; Oak
Ridge National Laboratory [DE-ACO5-000R22725]
FX The present study was funded by the Tennessee Valley Authority as part
of a larger project investigating the environmental consequences of the
coal ash spill at the Kingston Tennessee fossil fuel plant. Additional
support was provided by Middle Tennessee State University's
Undergraduate Research Experience and Creative Activity Program. The Oak
Ridge National Laboratory is managed by UT-Battelle for the US
Department of Energy under contract number DE-ACO5-000R22725. Special
thanks to B. Gendron for assistance with the collection of spiders and
to T. Jeff for final laboratory preparation of samples.
NR 31
TC 12
Z9 12
U1 2
U2 37
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0730-7268
J9 ENVIRON TOXICOL CHEM
JI Environ. Toxicol. Chem.
PD SEP
PY 2013
VL 32
IS 9
BP 2065
EP 2068
DI 10.1002/etc.2277
PG 4
WC Environmental Sciences; Toxicology
SC Environmental Sciences & Ecology; Toxicology
GA 189FX
UT WOS:000322253800017
PM 23686551
ER
PT J
AU Skogen, EJ
Vawter, GA
Tauke-Pedretti, A
Alford, CR
Overberg, ME
Sullivan, CT
AF Skogen, Erik J.
Vawter, G. Allen
Tauke-Pedretti, Anna
Alford, Charles R.
Overberg, Mark E.
Sullivan, Charles T.
TI Integrated Guided-Wave Photodiode Using Through-Absorber
Quantum-Well-Intermixing
SO IEEE PHOTONICS TECHNOLOGY LETTERS
LA English
DT Article
DE Ion implantation; photodiodes; quantum well devices; integrated
optoelectronics
ID COMPONENTS
AB A high-speed, high-saturation power photodiode compatible with a relatively simple monolithic integration process is described. The detector is comprised of an intrinsic bulk absorption layer, an electron drift region, and a field termination layer, and is grown above a main waveguide core comprised of a number of quantum wells, which are used as the active region of a phase modulator. Through-absorber quantum-well-intermixing is used to blue-shift the bandedge of the underlying quantum wells, reducing the optical losses of that material. The detectors demonstrate >90% quantum efficiency, >16 dBm input saturation power, and 3-dB bandwidth of 50 GHz.
C1 [Skogen, Erik J.; Vawter, G. Allen; Tauke-Pedretti, Anna; Alford, Charles R.; Overberg, Mark E.; Sullivan, Charles T.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Skogen, EJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM erik.skogen@sandia.gov; gavawte@sandia.gov; ataukep@sandia.gov;
cralfor@sandia.gov; meoverb@sandia.gov; ctsulli@sandia.gov
FU Sandia National Laboratories; U.S. Department of Energy's National
Nuclear Security Administration [DE-AC04-94AL85000]
FX Manuscript received April 10, 2013; revised June 3, 2013; accepted July
9, 2013. Date of publication July 17, 2013; date of current version
August 5, 2013. This work was supported in part by the Sandia National
Laboratories, which is a multi-program laboratory managed and operated
by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin
Corporation, and in part by the U.S. Department of Energy's National
Nuclear Security Administration under Contract DE-AC04-94AL85000.
NR 5
TC 1
Z9 1
U1 2
U2 18
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1041-1135
J9 IEEE PHOTONIC TECH L
JI IEEE Photonics Technol. Lett.
PD SEP 1
PY 2013
VL 25
IS 17
BP 1684
EP 1686
DI 10.1109/LPT.2013.2273754
PG 3
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA 202LW
UT WOS:000323219100009
ER
PT J
AU Li, JL
Armstrong, BL
Daniel, C
Kiggans, J
Wood, DL
AF Li, Jianlin
Armstrong, Beth L.
Daniel, Claus
Kiggans, Jim
Wood, David L., III
TI Optimization of multicomponent aqueous suspensions of lithium iron
phosphate (LiFePO4) nanoparticles and carbon black for lithium-ion
battery cathodes
SO JOURNAL OF COLLOID AND INTERFACE SCIENCE
LA English
DT Article
DE Dispersant; Lithium-ion batteries; Lithium iron phosphate; Materials
processing; Polyethyleneimine; Aqueous processing
ID ELECTROCHEMICAL PERFORMANCE; CARBOXYMETHYL CELLULOSE; DISPERSION
HOMOGENEITY; CELL PERFORMANCE; LICOO2 CATHODES; ELECTRODES
AB Addition of polyethyleneimine (PEI) to aqueous LiFePO4 nanoparticle suspensions improves stability and reduces agglomerate size, which is beneficial to lithium-ion battery cathode manufacturing. This research examines the effect of both PEI concentration and molecular weight (MW) on dispersing LiFePO4 and Super P C45 in multicomponent aqueous suspensions. It is demonstrated that the optimal conditions for obtaining stable suspensions with minimal agglomerate size are 1.5 wt% PEI with MW = 2000 g mol(-1) and 5.0 wt% PEI with MW = 10,000 g mol(-1) for LiFePO4 and Super P C45, respectively. The mixing sequence also affects rheological properties of these suspensions. It is found that dispersing the LiFePO4 and Super P C45 separately yielded suspensions with superior properties (Newtonian rheological behavior, smaller agglomerate size, improved settling, etc.). In particular, dispersing the LiFePO4 prior to the Super P C45 when making the final multicomponent suspension is found to be beneficial, which was evidenced by higher half-cell discharge capacity. (C) 2013 Elsevier Inc. All rights reserved.
C1 [Li, Jianlin; Daniel, Claus] Oak Ridge Natl Lab, Energy & Transportat Sci Div, Oak Ridge, TN 37831 USA.
[Armstrong, Beth L.; Kiggans, Jim; Wood, David L., III] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
[Daniel, Claus] Univ Tennessee, Bredesen Ctr Interdisciplinary Res & Grad Educ, Knoxville, TN 37996 USA.
RP Li, JL (reprint author), 1 Bethel Valley Rd,POB 2008,MS-6479, Oak Ridge, TN 37831 USA.
EM lij4@oml.gov; armstrongbl@oml.gov; danielc@oml.gov;
kiggansjojr@orni.gov; wooddl@oml.gov
RI Daniel, Claus/A-2060-2008; Li, Jianlin/D-3476-2011; kiggans,
james/E-1588-2017; Armstrong, Beth/E-6752-2017
OI Daniel, Claus/0000-0002-0571-6054; Li, Jianlin/0000-0002-8710-9847;
kiggans, james/0000-0001-5056-665X; Armstrong, Beth/0000-0001-7149-3576
FU U.S. Department of Energy (DOE) [DE-AC05-00OR22725]; Vehicle
Technologies Program (VTP); Office of Energy Efficiency and Renewable
Energy (EERE) Advanced Manufacturing Office
FX This research was performed at Oak Ridge National Laboratory (ORNL),
managed by UT Battelle, LLC, for the U.S. Department of Energy (DOE)
under contract DE-AC05-00OR22725, and was sponsored by the Office of
Energy Efficiency and Renewable Energy (EERE) Advanced Manufacturing
Office and Vehicle Technologies Program (VTP) (Applied Battery Research
Program Manager: Peter Faguy). The authors further wish to acknowledge
Kevin Cooley for assistance with the experiments. The authors also thank
Phostech Lithium Inc. and TIMCAL Graphite & Carbon for supplying
materials.
NR 24
TC 12
Z9 13
U1 7
U2 91
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9797
J9 J COLLOID INTERF SCI
JI J. Colloid Interface Sci.
PD SEP 1
PY 2013
VL 405
BP 118
EP 124
DI 10.1016/j.jcis.2013.05.030
PG 7
WC Chemistry, Physical
SC Chemistry
GA 180MD
UT WOS:000321598400017
PM 23764234
ER
PT J
AU Ding, YZ
Liu, B
Shen, X
Zhong, LR
Li, XQ
AF Ding, Yuanzhao
Liu, Bo
Shen, Xin
Zhong, Lirong
Li, Xiqing
TI Foam-Assisted Delivery of Nanoscale Zero Valent Iron in Porous Media
SO JOURNAL OF ENVIRONMENTAL ENGINEERING
LA English
DT Article
DE Foam; Delivery; Nanoscale zero valent iron (nZVI); Vadose zone; Porous
media
ID CONTAMINATED SOIL; SURFACTANT FOAM; RHAMNOLIPID FOAM; VADOSE ZONE;
REMEDIATION; PARTICLES; NANOPARTICLES; GROUNDWATER; FILTRATION;
SEDIMENTS
AB Foam is potentially a promising vehicle to deliver nanoparticles for vadose-zone remediation because foam can overcome the intrinsic problems associated with solution-based delivery, such as preferential flow and contaminant mobilization and spreading. In this work, the feasibility of using foam to deliver nanoscale zero valent iron (nZVI) in unsaturated porous media was investigated. Foam generated using the surfactant sodium lauryl ether sulfate (SLES) showed excellent ability to carry nZVI. SLES and nZVI concentrations in the foaming solutions did not affect the percentages of nZVI concentrations in foam relative to nZVI concentrations in the solutions. When foams carrying nZVI were injected through the unsaturated columns, the fractions of nZVI exiting the column were much higher than those when nZVI was injected with liquid. The enhanced nZVI transport implies that foam delivery could significantly increase the radius of influence of injected nZVI. The type and concentrations of surfactants and the influent nZVI concentrations did not noticeably affect nZVI transport during foam delivery. In contrast, nZVI retention increased considerably as the grain size of porous media decreased. Oxidation of foam-delivered nZVI due to oxygen diffusion into unsaturated porous media was visually examined in flow cell texts. It was demonstrated that if foam is injected to cover a deep vadose-zone layer, oxidation would only cause a small fraction of foam-delivered nZVI to be oxidized before it reacts with contaminants.
C1 [Ding, Yuanzhao; Liu, Bo; Li, Xiqing] Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Beijing 100871, Peoples R China.
[Shen, Xin] China Natl Environm Monitoring Ctr, Beijing 100012, Peoples R China.
[Zhong, Lirong] Pacific NW Natl Lab, Energy & Environm Directorate, Richland, WA 99354 USA.
RP Li, XQ (reprint author), Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Beijing 100871, Peoples R China.
EM lirong.zhong@pnl.gov; xli@urban.pku.edu.cn
FU National High-Tech Research and Development Program of the Ministry of
Science and Technology of China [2009AA063102]; Shenzhen Bureau of
Science Information [SY200806300176A]; U.S. DOE [DE-AC06-76RLO 1830]
FX This material is based on work funded by the National High-Tech Research
and Development Program of the Ministry of Science and Technology of
China (Grant 2009AA063102) and the Shenzhen Bureau of Science &
Information (Grant SY200806300176A). The Pacific Northwest National
Laboratory (PNNL) is operated by Battelle for the U.S. DOE under
Contract DE-AC06-76RLO 1830.
NR 47
TC 1
Z9 1
U1 2
U2 44
PU ASCE-AMER SOC CIVIL ENGINEERS
PI RESTON
PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
SN 0733-9372
J9 J ENVIRON ENG
JI J. Environ. Eng.-ASCE
PD SEP 1
PY 2013
VL 139
IS 9
BP 1206
EP 1212
DI 10.1061/(ASCE)EE.1943-7870.0000727
PG 7
WC Engineering, Environmental; Engineering, Civil; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 198YY
UT WOS:000322961500008
ER
PT J
AU Freedman, VL
Mackley, R
Waichler, SR
Horner, J
AF Freedman, Vicky L.
Mackley, Rob
Waichler, Scott R.
Horner, Jake
TI Evaluation of Analytical and Numerical Techniques for Defining the
Radius of Influence for an Open-Loop Ground Source Heat Pump System
SO JOURNAL OF HYDROLOGIC ENGINEERING
LA English
DT Article
DE Open-loop heat pumps; Ground source heat pumps; Groundwater heat pumps
(GHPs); Groundwater; Radius of influence
ID DELAYED GRAVITY RESPONSE; UNCONFINED AQUIFERS; FLOW
AB In an open-loop groundwater heat pump (GHP) system, groundwater is extracted, run through a heat exchanger, and injected back into the ground, resulting in no mass balance changes to the flow system. Although the groundwater use is nonconsumptive, the withdrawal and injection of groundwater may cause negative hydraulic and thermal impacts to the flow system. Because GHPs are a relatively new technology and regulatory guidelines for determining environmental impacts for GHPs may not exist, consumptive-use metrics may need to be used for permit applications. For consumptive-use permits, a radius of influence is often used, which is defined as the radius beyond which hydraulic impacts to the system are considered negligible. In this paper, the hydraulic radius of influence concept was examined using analytical and numerical methods for a nonconsumptive GHP system in southeastern Washington State. At this location, the primary hydraulic concerns were impacts to nearby contaminant plumes and a water supply well field. The results reported in this paper show that distance drawdown methods for both analytical and numerical methods were generally unsuitable because they overpredicted the influence of the well system. Particle tracking yielded more reasonable results because flow paths demonstrated the probable impact on the flow system. In particular, the use of a capture zone analysis was identified as the best method for determining potential changes in current contaminant plume trajectories, which could be performed with both analytical and numerical techniques. Capture zone analysis is a more quantitative and reliable tool for determining the radius of influence with a greater accuracy and better insight for a nonconsumptive GHP assessment. (C) 2013 American Society of Civil Engineers.
C1 [Freedman, Vicky L.; Mackley, Rob; Waichler, Scott R.; Horner, Jake] Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Freedman, VL (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM vicky.freedman@pnnl.gov
NR 25
TC 0
Z9 0
U1 0
U2 19
PU ASCE-AMER SOC CIVIL ENGINEERS
PI RESTON
PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
SN 1084-0699
J9 J HYDROL ENG
JI J. Hydrol. Eng.
PD SEP 1
PY 2013
VL 18
IS 9
BP 1170
EP 1179
DI 10.1061/(ASCE)HE.1943-5584.0000720
PG 10
WC Engineering, Civil; Environmental Sciences; Water Resources
SC Engineering; Environmental Sciences & Ecology; Water Resources
GA 198ZG
UT WOS:000322962300013
ER
PT J
AU Fitz-Gibbon, S
Tomida, S
Chiu, BH
Nguyen, L
Du, C
Liu, MH
Elashoff, D
Erfe, MC
Loncaric, A
Kim, J
Modlin, RL
Miller, JF
Sodergren, E
Craft, N
Weinstock, GM
Li, HY
AF Fitz-Gibbon, Sorel
Tomida, Shuta
Chiu, Bor-Han
Lin Nguyen
Du, Christine
Liu, Minghsun
Elashoff, David
Erfe, Marie C.
Loncaric, Anya
Kim, Jenny
Modlin, Robert L.
Miller, Jeff F.
Sodergren, Erica
Craft, Noah
Weinstock, George M.
Li, Huiying
TI Propionibacterium acnes Strain Populations in the Human Skin Microbiome
Associated with Acne
SO JOURNAL OF INVESTIGATIVE DERMATOLOGY
LA English
DT Article
ID STREPTOLYSIN-S; STAPHYLOCOCCUS-AUREUS; ESCHERICHIA-COLI; BODY HABITATS;
BACTERIA; SEQUENCE; STREPTOCOCCUS; RESISTANCE; DIVERSITY; GENES
AB The human skin microbiome has important roles in skin health and disease. However, bacterial population structure and diversity at the strain level is poorly understood. We compared the skin microbiome at the strain level and genome level of Propionibacterium acnes, a dominant skin commensal, between 49 acne patients and 52 healthy individuals by sampling the pilosebaceous units on their noses. Metagenomic analysis demonstrated that although the relative abundances of P. acnes were similar, the strain population structures were significantly different in the two cohorts. Certain strains were highly associated with acne, and other strains were enriched in healthy skin. By sequencing 66 previously unreported P. acnes strains and comparing 71 P. acnes genomes, we identified potential genetic determinants of various P. acnes strains in association with acne or health. Our analysis suggests that acquired DNA sequences and bacterial immune elements may have roles in determining virulence properties of P. acnes strains, and some could be future targets for therapeutic interventions. This study demonstrates a previously unreported paradigm of commensal strain populations that could explain the pathogenesis of human diseases. It underscores the importance of strain-level analysis of the human microbiome to define the role of commensals in health and disease.
C1 [Fitz-Gibbon, Sorel; Tomida, Shuta; Chiu, Bor-Han; Lin Nguyen; Du, Christine; Li, Huiying] Univ Calif Los Angeles, David Geffen Sch Med, Crump Inst Mol Imaging, Dept Mol & Med Pharmacol, Los Angeles, CA 90095 USA.
[Du, Christine; Elashoff, David; Loncaric, Anya; Kim, Jenny; Modlin, Robert L.] Univ Calif Los Angeles, David Geffen Sch Med, Dept Med, Los Angeles, CA 90095 USA.
[Liu, Minghsun; Modlin, Robert L.; Miller, Jeff F.] Univ Calif Los Angeles, David Geffen Sch Med, Dept Microbiol Immunol & Mol Genet, Los Angeles, CA 90095 USA.
[Erfe, Marie C.; Craft, Noah] Univ Calif Los Angeles, David Geffen Sch Med, Harbor UCLA Med Ctr, Ctr Immunotherapeut Res,Los Angeles Biomed Res In, Los Angeles, CA 90095 USA.
[Kim, Jenny; Sodergren, Erica; Weinstock, George M.] Vet Affairs Greater Los Angeles Healthcare Syst, Dept Dermatol, Los Angeles, CA USA.
[Li, Huiying] Washington Univ, Genome Inst, St Louis, MO USA.
[Fitz-Gibbon, Sorel; Tomida, Shuta] UCLA DOE Inst Genom & Prote, Los Angeles, CA USA.
RP Li, HY (reprint author), Univ Calif Los Angeles, 4339 CNSI,570 Westwood Plaza,Bldg 114, Los Angeles, CA 90095 USA.
EM huiying@mednet.ucla.edu
OI Modlin, Robert/0000-0003-4720-031X
FU NIH [U54HG004968]; NIH/NIAMS [UH2AR057503]
FX We thank G Kasimatis, B Shi, EE Curd, R Yan, M Wong, and J Liu for
comments and technical support. We thank C Lee for performing
statistical analyses in the initial phase. We also thank Z Guo and CS
Miller for critical reading of the manuscript. This research was funded
as one of the Demonstration Projects by the NIH Human Microbiome Project
(HMP). It was supported by grant UH2AR057503 from NIH/NIAMS and grant
U54HG004968 from NIH.
NR 43
TC 106
Z9 111
U1 8
U2 80
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 0022-202X
J9 J INVEST DERMATOL
JI J. Invest. Dermatol.
PD SEP
PY 2013
VL 133
IS 9
BP 2152
EP 2160
DI 10.1038/jid.2013.21
PG 9
WC Dermatology
SC Dermatology
GA 202GY
UT WOS:000323203300013
PM 23337890
ER
PT J
AU Craft, N
Li, HY
AF Craft, Noah
Li, Huiying
TI Response to the Commentaries on the Paper: Propionibacterium acnes
Strain Populations in the Human Skin Microbiome Associated with Acne
SO JOURNAL OF INVESTIGATIVE DERMATOLOGY
LA English
DT Letter
C1 [Craft, Noah] Univ Calif Los Angeles, Los Angeles Med Ctr, Ctr Immunotherapeut Res, Los Angeles Biomed Res Inst Harbor, Los Angeles, CA 90024 USA.
[Li, Huiying] Univ Calif Los Angeles, David Geffen Sch Med, Crump Inst Mol Imaging, Dept Mol & Med Pharmacol, Los Angeles, CA 90095 USA.
[Li, Huiying] Univ Calif Los Angeles, DOE Inst Genom & Prote, Los Angeles, CA USA.
RP Craft, N (reprint author), Univ Calif Los Angeles, Los Angeles Med Ctr, Ctr Immunotherapeut Res, Los Angeles Biomed Res Inst Harbor, Los Angeles, CA 90024 USA.
EM huiying@mednet.ucla.edu
NR 17
TC 6
Z9 6
U1 0
U2 23
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 0022-202X
J9 J INVEST DERMATOL
JI J. Invest. Dermatol.
PD SEP
PY 2013
VL 133
IS 9
BP 2295
EP 2297
DI 10.1038/jid.2013.275
PG 3
WC Dermatology
SC Dermatology
GA 202GY
UT WOS:000323203300031
PM 23774528
ER
PT J
AU Al Hasan, NM
Johnson, GE
Laskin, J
AF Al Hasan, Naila M.
Johnson, Grant E.
Laskin, Julia
TI Gas-Phase Synthesis of Singly and Multiply Charged Polyoxovanadate
Anions Employing Electrospray Ionization and Collision Induced
Dissociation
SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
LA English
DT Article
DE Polyoxometalate; Electrospray ionization; Vanadium oxide; Multiply
charged; Mass spectrometry; Collision-induced dissociation
ID OXIDE CLUSTER CATIONS; NEUTRAL VANADIUM-OXIDE; MASS-SPECTROMETRY;
VIBRATIONAL SPECTROSCOPY; PHOTOELECTRON-SPECTROSCOPY;
ELECTRONIC-STRUCTURE; CHEMISTRY; IONS; CATALYSIS; CAGES
AB Electrospray ionization mass spectrometry (ESI-MS) combined with in-source fragmentation and tandem mass spectrometry (MS/MS) experiments were used to generate a wide range of singly and multiply charged vanadium oxide cluster anions including VxOy (n-) and VxOyCln- ions (x = 1-14, y = 2-36, n = 1-3), protonated clusters, and ligand-bound polyoxovanadate anions. The cluster anions were produced by electrospraying a solution of tetradecavanadate, V14O36Cl(L)(5) (L = Et4N+, tetraethylammonium), in acetonitrile. Under mild source conditions, ESI-MS generates a distribution of doubly and triply charged VxOyCln- and VxOyCl(L)((n-1)-) clusters predominantly containing 14 vanadium atoms as well as their protonated analogs. Accurate mass measurement using a high-resolution LTQ/Orbitrap mass spectrometer (m/Delta m = 60,000 at m/z 410) enabled unambiguous assignment of the elemental composition of the majority of peaks in the ESI-MS spectrum. In addition, high-sensitivity mass spectrometry allowed the charge state of the cluster ions to be assigned based on the separation of the major from the much less abundant minor isotope of vanadium. In-source fragmentation resulted in facile formation of smaller VxOyCl(1-2)- and VxOy ((1-2)-) anions. Collision-induced dissociation (CID) experiments enabled systematic study of the gas-phase fragmentation pathways of the cluster anions originating from solution and from in-source CID. Surprisingly simple fragmentation patterns were obtained for all singly and doubly charged VxOyCl and VxOy species generated through multiple MS/MS experiments. In contrast, cluster anions originating directly from solution produced comparatively complex CID spectra. These results are consistent with the formation of more stable structures of VxOyCl and VxOy anions through low-energy CID. Furthermore, our results demonstrate that solution-phase synthesis of one precursor cluster anion combined with gas-phase CID is an efficient approach for the top-down synthesis of a wide range of singly and multiply charged gas-phase metal oxide cluster anions for subsequent investigations of structure and reactivity using mass spectrometry and ion spectroscopy techniques.
C1 [Al Hasan, Naila M.; Johnson, Grant E.; Laskin, Julia] Pacific NW Natl Lab, Div Phys Sci, Richland, WA 99352 USA.
RP Laskin, J (reprint author), Pacific NW Natl Lab, Div Phys Sci, Richland, WA 99352 USA.
EM Julia.Laskin@pnnl.gov
RI Laskin, Julia/H-9974-2012;
OI Laskin, Julia/0000-0002-4533-9644; Johnson, Grant/0000-0003-3352-4444
FU Office of Basic Energy Sciences, Division of Chemical Sciences,
Geosciences, and Biosciences of the U.S. Department of Energy (DOE); DOE
Science Undergraduate Laboratory Internship (SULI); Linus Pauling
Fellowship; Laboratory Directed Research and Development Program at the
Pacific Northwest National Laboratory (PNNL); Department of Energy's
Office of Biological and Environmental Research and located at PNNL
FX This research was funded by the Office of Basic Energy Sciences,
Division of Chemical Sciences, Geosciences, and Biosciences of the U.S.
Department of Energy (DOE). N.M.A. acknowledges support from the DOE
Science Undergraduate Laboratory Internship (SULI). G.E.J. acknowledges
support from the Linus Pauling Fellowship and the Laboratory Directed
Research and Development Program at the Pacific Northwest National
Laboratory (PNNL). This work was performed using EMSL, a national
scientific user facility sponsored by the Department of Energy's Office
of Biological and Environmental Research and located at PNNL. PNNL is
operated by Battelle for the U.S. DOE.
NR 71
TC 3
Z9 3
U1 3
U2 53
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1044-0305
J9 J AM SOC MASS SPECTR
JI J. Am. Soc. Mass Spectrom.
PD SEP
PY 2013
VL 24
IS 9
BP 1385
EP 1395
DI 10.1007/s13361-013-0683-0
PG 11
WC Biochemical Research Methods; Chemistry, Analytical; Chemistry,
Physical; Spectroscopy
SC Biochemistry & Molecular Biology; Chemistry; Spectroscopy
GA 200HX
UT WOS:000323060000010
PM 23817833
ER
PT J
AU Lee, H
Caparelli, E
Li, HF
Mandal, A
Smith, SD
Zhang, SN
Bilfinger, TV
Benveniste, H
AF Lee, Hedok
Caparelli, Elisabeth
Li, Haifang
Mandal, Amit
Smith, S. David
Zhang, Shaonan
Bilfinger, Thomas V.
Benveniste, Helene
TI Computerized MRS voxel registration and partial volume effects in single
voxel H-1-MRS
SO MAGNETIC RESONANCE IMAGING
LA English
DT Article
DE (HMRS)-H-1; Partial volume effects; Image reconstruction
ID MAGNETIC-RESONANCE-SPECTROSCOPY; SHORT-ECHO-TIME; PROTON NMR-SPECTRA;
HUMAN BRAIN; IN-VIVO; METABOLITE CONCENTRATIONS; WHITE-MATTER;
N-ACETYLASPARTATE; TISSUE WATER; H-1 MRS
AB Partial volume effects in proton magnetic resonance spectroscopy in the brain have been studied previously in terms of proper water concentration calculations, but there is a lack of disclosure in terms of voxel placement techniques that would affect the calculations. The purpose of this study is to facilitate a fully automated MRS voxel registration method which is time efficient, accurate, and can be extended to all imaging modalities. A total of thirteen healthy adults underwent single voxel 1H-MRS scans in 3.0 T MRI scanners. Transposition of a MRS voxel onto an anatomical scan is derived along with a full calculation of water concentration with a correction term to account for the partial volume effects. Five metabolites (tNAA, Glx, tCr, ml, and tCho) known to yield high reliability are studied. Pearson's correlation analyses between tissue volume fractions and metabolite concentrations were statistically significant in parietal (tCr, Glx, and tNAA) lobe and occipital lobe (tNAA). MRS voxel overlaps quantified by dice metric over repeated visits yielded 60% similar to 70% and coefficients of variance in metabolites concentration were 4% similar to 10%. These findings reiterate an importance of considering the partial volume effects when tissue water is used as an internal concentration reference so as to avoid misinterpreting a morphometric difference as a metabolic difference. (C) 2013 Elsevier Inc. All rights reserved.
C1 [Lee, Hedok; Mandal, Amit; Benveniste, Helene] SUNY Stony Brook, Dept Anesthesiol, Stony Brook, NY 11794 USA.
[Caparelli, Elisabeth] SUNY Stony Brook, Social Cognit & Affect Neurosci Ctr, Stony Brook, NY 11794 USA.
[Li, Haifang; Benveniste, Helene] SUNY Stony Brook, Dept Radiol, Stony Brook, NY 11794 USA.
[Smith, S. David] Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
[Zhang, Shaonan] SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA.
[Bilfinger, Thomas V.] SUNY Stony Brook, Dept Surg, Stony Brook, NY 11794 USA.
RP Lee, H (reprint author), SUNY Stony Brook, Dept Anesthesiol, Stony Brook, NY 11794 USA.
EM hedoklee@gmail.com
FU Translational Research Opportunity Grant from the School of Medicine,
State University of New York at Stony Brook
FX This research was supported by a grant from a Translational Research
Opportunity Grant from the School of Medicine, State University of New
York at Stony Brook. Preliminary account was previously presented at the
International Society for Magnetic Resonance in Medicine, May 7-11,
2012; Melbourne, Australia. We thank the Wellcome Trust Centre for
Neuroimaging at University College London
(http://www.fil.ion.ucl.ac.uk/spm/) for the development of SPM.
NR 64
TC 5
Z9 5
U1 0
U2 14
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0730-725X
J9 MAGN RESON IMAGING
JI Magn. Reson. Imaging
PD SEP
PY 2013
VL 31
IS 7
BP 1197
EP 1205
DI 10.1016/j.mri.2013.04.001
PG 9
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA 198TG
UT WOS:000322944600022
PM 23659770
ER
PT J
AU Tasora, A
Anitescu, M
AF Tasora, Alessandro
Anitescu, Mihai
TI A complementarity-based rolling friction model for rigid contacts
SO MECCANICA
LA English
DT Article
DE Variational inequalities; Contacts; Rolling friction; Multibody;
Complementarity
ID DISCRETE ELEMENT METHOD; MULTIBODY DYNAMICS; GRANULAR-MATERIALS; BODY
DYNAMICS; LARGE-SCALE; RESISTANCE
AB In this work (also, preprint ANL/MCS-P3020-0812, Argonne National Laboratory) we introduce a complementarity-based rolling friction model to characterize dissipative phenomena at the interface between moving parts. Since the formulation is based on differential inclusions, the model fits well in the context of nonsmooth dynamics, and it does not require short integration timesteps. The method encompasses a rolling resistance limit for static cases, similar to what happens for sliding friction; this is a simple yet efficient approach to problems involving transitions from rolling to resting, and vice-versa. We propose a convex relaxation of the formulation in order to achieve algorithmic robustness and stability; moreover, we show the side effects of the convexification. A natural application of the model is the dynamics of granular materials, because of the high computational efficiency and the need for only a small set of parameters. In particular, when used as a micromechanical model for rolling resistance between granular particles, the model can provide an alternative way to capture the effect of irregular shapes. Other applications can be related to real-time simulations of rolling parts in bearing and guideways, as shown in examples.
C1 [Tasora, Alessandro] Univ Parma, Dipartimento Ingn Ind, I-43100 Parma, Italy.
[Anitescu, Mihai] Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
RP Tasora, A (reprint author), Univ Parma, Dipartimento Ingn Ind, I-43100 Parma, Italy.
EM tasora@ied.unipr.it; anitescu@mcs.anl.gov
FU U.S. Department of Energy [DE-AC02-06CH11357]; Ferrari Automotive; TP
Engineering
FX A. Tasora thanks Ferrari Automotive and TP Engineering for financial
support. Mihai Anitescu was supported by the U.S. Department of Energy,
under Contract No. DE-AC02-06CH11357.
NR 37
TC 8
Z9 8
U1 2
U2 25
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0025-6455
J9 MECCANICA
JI Meccanica
PD SEP
PY 2013
VL 48
IS 7
BP 1643
EP 1659
DI 10.1007/s11012-013-9694-y
PG 17
WC Mechanics
SC Mechanics
GA 200IO
UT WOS:000323061900008
ER
PT J
AU Hazen, TC
AF Hazen, Terry C.
TI The SuperChip for microbial community structure, and function from all
environments
SO MICROBIAL BIOTECHNOLOGY
LA English
DT Editorial Material
ID SEA OIL PLUME
AB We have the technology and capability to develop an all-in-one microarray that can provide complete information on a microbial community, including algae, protozoa, bacteria, archaea, fungi, viruses, antimicrobial resistance, biotoxins and functional activity. With lab-on-a-chip, nanotechnology integrating a variety of the latest methods for a large number of sample types (water, sediment, waste water, food, blood, etc.) it is possible to make a desktop instrument that would have universal applications. There are two major thrusts to this grand challenge that will allow us to take advantage of the latest biotechnological breakthroughs in real time. The first is a bioengineering thrust that will take advantage of the large multidisciplinary laboratories in developing key technologies. Miniaturization will reduce reagent costs and increase sensitivity and reaction kinetics for rapid turnaround time. New and evolving technologies will allow us to port the designs for state-of-the-art microarrays today to completely new nanotechnology inspired platforms as they mature. The second thrust is in bioinformatics to use our existing expertise to take advantage of the rapidly evolving landscape of bioinformatics data. This increasing capacity of the data set will allow us to resolve microbial species to greatly improved levels and identify functional genes beyond the hypothetical protein level. A cheap and portable assay would impact countless areas, including clean water technologies, emerging diseases, bioenergy, infectious disease diagnosis, climate change, food safety, environmental clean-up and bioterrorism. In my opinion it is possible but it will require a very large group of multidiscplenary scientists from multiple institutions crossing many international boundaries and funding over a 5-year period of more than $100 million. Given the impact that this SuperChip could have it is well worth the price!!!
C1 [Hazen, Terry C.] Univ Tennessee, Dept Civil & Environm Engn, Knoxville, TN 37996 USA.
[Hazen, Terry C.] Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA.
[Hazen, Terry C.] Oak Ridge Natl Lab, Biol Sci Div, Oak Ridge, TN 37831 USA.
RP Hazen, TC (reprint author), Univ Tennessee, Dept Civil & Environm Engn, Knoxville, TN 37996 USA.
EM tchazen@utk.edu
RI Luan, Gan/B-3211-2015; Hazen, Terry/C-1076-2012
OI Hazen, Terry/0000-0002-2536-9993
NR 6
TC 1
Z9 2
U1 4
U2 37
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1751-7907
EI 1751-7915
J9 MICROB BIOTECHNOL
JI Microb. Biotechnol.
PD SEP
PY 2013
VL 6
IS 5
BP 450
EP 452
DI 10.1111/1751-7915.12045
PG 3
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 200XP
UT WOS:000323105200002
PM 23464831
ER
PT J
AU Piskorska, M
Soule, T
Gosse, JL
Milliken, C
Flickinger, MC
Smith, GW
Yeager, CM
AF Piskorska, M.
Soule, T.
Gosse, J. L.
Milliken, C.
Flickinger, M. C.
Smith, G. W.
Yeager, C. M.
TI Preservation of H-2 production activity in nanoporous latex coatings of
Rhodopseudomonas palustris CGA009 during dry storage at ambient
temperatures
SO MICROBIAL BIOTECHNOLOGY
LA English
DT Article
ID LACTIC-ACID BACTERIA; HYDROGEN-PRODUCTION; ESCHERICHIA-COLI;
BIOCATALYTIC COATINGS; DRIED BACTERIA; IMMOBILIZATION; MICROORGANISMS;
SORBITOL; CELLS; MICROSTRUCTURE
AB To assess the applicability of latex cell coatings as an 'off-the-shelf' biocatalyst, the effect of osmoprotectants, temperature, humidity and O2 on preservation of H2 production in Rhodopseudomonas palustris coatings was evaluated. Immediately following latex coating coalescence (24 h) and for up to 2 weeks of dry storage, rehydrated coatings containing different osmoprotectants displayed similar rates of H2 production. Beyond 2 weeks of storage, sorbitol-treated coatings lost all H2 production activity, whereas considerable H2 production was still detected in sucrose-and trehalose-stabilized coatings. The relative humidity level at which the coatings were stored had a significant impact on the recovery and subsequent rates of H2 production. After 4 weeks storage under air at 60% humidity, coatings produced only trace amounts of H2 (0-0.1% headspace accumulation), whereas those stored at < 5% humidity retained 27-53% of their H2 production activity after 8 weeks of storage. When stored in argon at < 5% humidity and room temperature, R. palustris coatings retained full H2 production activity for 3 months, implicating oxidative damage as a key factor limiting coating storage. Overall, the results demonstrate that biocatalytic latex coatings are an attractive cell immobilization platform for preservation of bioactivity in the dry state.
C1 [Piskorska, M.; Smith, G. W.] Univ S Carolina, Aiken, SC 29801 USA.
[Soule, T.; Milliken, C.; Yeager, C. M.] Savannah River Natl Lab, Aiken, SC 29808 USA.
[Gosse, J. L.; Flickinger, M. C.] N Carolina State Univ, Raleigh, NC 27695 USA.
RP Yeager, CM (reprint author), Los Alamos Natl Lab, Biosci Div, POB 1663, Los Alamos, NM 87545 USA.
EM cyeager@lanl.gov
OI Flickinger, Michael/0000-0002-2192-2501
FU US Department of Energy, Office of Environmental Management [LDRD09060];
DOE, Office of Fossil Energy - National Energy Technology Laboratory
[DE-EE0003152]; Economic Development Partnership for Aiken [0026];
Edgefield Counties
FX This project was supported by the US Department of Energy, Office of
Environmental Management as administered by the SRNL Laboratory Directed
Research and Development Program (LDRD09060), DOE Grant DE-EE0003152,
Office of Fossil Energy - National Energy Technology Laboratory and
support from the Economic Development Partnership for Aiken 0026;
Edgefield Counties.
NR 48
TC 2
Z9 2
U1 3
U2 25
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1751-7907
J9 MICROB BIOTECHNOL
JI Microb. Biotechnol.
PD SEP
PY 2013
VL 6
IS 5
BP 515
EP 525
DI 10.1111/1751-7915.12032
PG 11
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 200XP
UT WOS:000323105200006
PM 23331993
ER
EF