FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Li, SY Beyerlein, IJ Necker, CT AF Li, SY Beyerlein, IJ Necker, CT TI On the development of microstructure and texture heterogeneity in ECAE via route C SO ACTA MATERIALIA LA English DT Article DE microstructure; texture; severe plastic deformation; latent hardening; simple shear ID CHANNEL ANGULAR EXTRUSION; FINITE-ELEMENT-ANALYSIS; INITIAL TEXTURE; MODELING TEXTURE; PROCESSING ROUTE; FCC POLYCRYSTALS; BCC MATERIALS; SIMPLE SHEAR; EVOLUTION; DEFORMATION AB Deformation in every two passes of route C by equal channel angular extrusion (ECAE) is commonly viewed as severe forward and reverse shearing. Contrary to predictions by standard polycrystal models, microstructural observations and texture measurements of a variety of ECAE materials consistently show that the initial state of the material is not recovered after even-numbered passes in this route. For the first time, the factors governing the microstructural and texture evolutions during two passes of route C are investigated using orientation imaging microscopy (OIM) and multi-scale modeling. For a two-pass pure copper sample processed by a 90 degrees die, a useful model example, the OIM measurements reveal that the variation in rnicrostructure and texture across the sample thickness is significant and all the textures show shear-type characteristics. Using finite element simulations for the macroscopic deformation, self-consistent modeling for polycrystals, and a latent hardening model for single crystals, it is shown that the deviation from idealized simple shear deformation and the difference in the deformation between successive passes due to changes in material behavior play a primary role, while anisotropy in single-crystal hardening plays a relatively minor one. Textures predicted, considering the two main factors, are in good agreement with the measurements. Published by Elsevier Ltd on behalf of Acta Materialia Inc. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Li, SY (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. EM Saiyi@lanl.gov RI Li, Saiyi/J-3968-2012; Beyerlein, Irene/A-4676-2011 NR 30 TC 38 Z9 38 U1 0 U2 2 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 MAR PY 2006 VL 54 IS 5 BP 1397 EP 1408 DI 10.1016/j.actamat.2005.11.020 PG 12 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 018LH UT WOS:000235765300022 ER PT J AU Jones, KW Feng, H Stern, EA Neuhausler, U Osan, J Marinkovic, N Song, Z AF Jones, KW Feng, H Stern, EA Neuhausler, U Osan, J Marinkovic, N Song, Z TI Properties of New York/New Jersey Harbor Sediments SO ACTA PHYSICA POLONICA A LA English DT Article; Proceedings Paper CT 40th Zakopane School of Physics International Symposium CY MAY 20-25, 2005 CL Zakopane, POLAND SP Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Polish Acad Sci, Comm Phys, Jagiellonian Univ, Marian Smoluchowski Inst Phys AB Sediments found in waterways around the world may contain toxic compounds of anthropogenic origin that can harm the environment and human health. As a result, it is often necessary to remove them and find disposal methods that are environmentally and economically acceptable. Here, we report on results obtained in an experimental program to characterize the nature of the sediment contamination. The objective was to gain a better understanding of the properties of the sediments to develop better methods for understanding the fate and transport of the contaminants and for improving methods for their removal from the sediments. Our investigations made use of X-ray facilities at the Brookhaven National Synchrotron Light Source and the European Synchrotron Radiation Facility at Grenoble, France. The experiments included: measurements of the microstructure of the sediments using computed microtomography, X-ray absorption, and fluorescence microscopy with resolutions as low as 0.2 micrometers to obtain information on the relationships of organic and mineral components of the sediments and on the distribution of contaminants on the surfaces of the sediment grains, investigation of functional groups of chemical compounds using X-ray absorption near-edge spectroscopy and Fourier transform infrared spectroscopy. Scanning electron microscopy and electron probe measurements were made to ascertain the morphology of the sediment surfaces and the distribution of metals on individual sediment grains. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Montclair State Univ, Montclair, NJ 07043 USA. US EPA, New York, NY 10007 USA. Univ Bielefeld, D-33501 Bielefeld, Germany. KFKI Atom Energy Res Inst, H-1525 Budapest, Hungary. Albert Einstein Coll Med, Bronx, NY 10461 USA. RP Brookhaven Natl Lab, Upton, NY 11973 USA. RI Marinkovic, Nebojsa/A-1137-2016 OI Marinkovic, Nebojsa/0000-0003-3579-3453 NR 4 TC 1 Z9 1 U1 0 U2 0 PU POLISH ACAD SCIENCES INST PHYSICS PI WARSAW PA AL LOTNIKOW 32-46, PL-02-668 WARSAW, POLAND SN 0587-4246 EI 1898-794X J9 ACTA PHYS POL A JI Acta Phys. Pol. A PD MAR PY 2006 VL 109 IS 3 BP 279 EP 286 PG 8 WC Physics, Multidisciplinary SC Physics GA 025WZ UT WOS:000236299200007 ER PT J AU Brodsky, SJ AF Brodsky, SJ TI Photon-photon collisions - Past and future SO ACTA PHYSICA POLONICA B LA English DT Article; Proceedings Paper CT Internatioanl Conference on Structure and Interactions of the Photon/16th International Workshop on Photon-Photon Collisions CY AUG 30-SEP 04, 2005 CL Warsaw, POLAND SP Warsaw Univ, Fac Phys, Andrzej Soltan Inst Nucl Studies, DESY Zeuthen, Polish Acad Arts & Sci, Polish Acad Sci, European Phys Soc, Cooperat Entre L I N2P3 Lab Polonais, Polish Minist Natl Educ & Sport, Polish Minist Sci & Informat Soc Technol, Natl Atom Energy Agcy, TopGaN Ltd, City Warsaw, Royal Castle Warsaw, ATM S A, Warsaw Destinat Alliance, A Blikele Sp z o o ID 2-PHOTON COLLISIONS; QUANTUM CHROMODYNAMICS; PARTICLE PRODUCTION; EXCLUSIVE PROCESSES; ELECTRON-ELECTRON; LINEAR COLLIDER; PAIR PRODUCTION; CROSS-SECTIONS; HIGH-ENERGIES; SCATTERING AB I give a brief review of the history of photon-photon physics and a survey of its potential at future electron-positron colliders. Exclusive hadron production processes in photon-photon and electron-photon collisions provide important tests of QCD at the amplitude level, particularly as measures of hadron distribution amplitudes. There are also important high energy gamma gamma and e gamma tests of quantum chromodynamics, including the production of jets in photon-photon collisions, deeply virtual Compton scattering on a photon target, and leading-twist single-spin asymmetries for a photon polarized normal to a production plane. Since photons couple directly to all fundamental fields carrying the electromagnetic current including leptons, quarks, W's, and supersymmetric particles, high energy gamma gamma collisions will provide a comprehensive laboratory for Higgs production and exploring virtually every aspect of the Standard Model and its extensions. High energy back-scattered laser beams will thus greatly extend the range of physics of the International Linear Collider. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Brodsky, SJ (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM sjbth@slac.stanford.edu NR 66 TC 8 Z9 8 U1 0 U2 2 PU ACTA PHYSICA POLONICA B, JAGELLONIAN UNIV, INST PHYSICS PI KRAKOW PA REYMONTA 4, 30-059 KRAKOW, POLAND SN 0587-4254 J9 ACTA PHYS POL B JI Acta Phys. Pol. B PD MAR PY 2006 VL 37 IS 3 BP 619 EP 632 PG 14 WC Physics, Multidisciplinary SC Physics GA 027KT UT WOS:000236415200008 ER PT J AU Brodsky, SJ AF Brodsky, SJ TI Exclusive two-photon processes in QCD SO ACTA PHYSICA POLONICA B LA English DT Article; Proceedings Paper CT Internatioanl Conference on Structure and Interactions of the Photon/16th International Workshop on Photon-Photon Collisions CY AUG 30-SEP 04, 2005 CL Warsaw, POLAND SP Warsaw Univ, Fac Phys, Andrzej Soltan Inst Nucl Studies, DESY Zeuthen, Polish Acad Arts & Sci, Polish Acad Sci, European Phys Soc, Cooperat Entre L I N2P3 Lab Polonais, Polish Minist Natl Educ & Sport, Polish Minist Sci & Informat Soc Technol, Natl Atom Energy Agcy, TopGaN Ltd, City Warsaw, Royal Castle Warsaw, ATM S A, Warsaw Destinat Alliance, A Blikele Sp z o o ID PERTURBATIVE QUANTUM CHROMODYNAMICS; PIONS DISTRIBUTION AMPLITUDE; LARGE-MOMENTUM-TRANSFER; TRANSITION FORM-FACTOR; COMPTON-SCATTERING; TRANSVERSE-MOMENTUM; WAVE-FUNCTION; GAMMA-GAMMA; 2ND MOMENT; LATTICE AB Hadron pair production from two-photon annihilation plays an important role in unraveling the perturbative and non-perturbative structure of QCD, first by testing the validity and empirical applicability of leading-twist factorization theorems, second by verifying the structure of the underlying perturbative QCD subprocesses, and third, through measurements of angular distributions and ratios which are sensitive to the shape of the distribution amplitudes. In effect, photon-photon collisions provide a microscope for testing fundamental scaling laws of PQCD and for measuring distribution amplitudes. The determination of the shape and normalization of the distribution amplitude is particularly important in view of their importance in the analysis of exclusive semi-leptonic and two-body hadronic B-decays. The data from the Belle and CLEO collaborations on single and double meson production are in excellent agreement with the QCD predictions. In contrast, the normalization of the nominal leading-order predictions of PQCD for proton pair production appears to be significantly below recent Belle measurements. I also review issues relating to renormalization scale setting. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Brodsky, SJ (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM sjbth@slac.stanford.edu NR 65 TC 1 Z9 1 U1 0 U2 0 PU ACTA PHYSICA POLONICA B, JAGELLONIAN UNIV, INST PHYSICS PI KRAKOW PA REYMONTA 4, 30-059 KRAKOW, POLAND SN 0587-4254 J9 ACTA PHYS POL B JI Acta Phys. Pol. B PD MAR PY 2006 VL 37 IS 3 BP 905 EP 918 PG 14 WC Physics, Multidisciplinary SC Physics GA 027KT UT WOS:000236415200049 ER PT J AU Barabash, OM Barabash, RI David, SA Ice, GE AF Barabash, OM Barabash, RI David, SA Ice, GE TI Residual stresses, thermomechanical behavior and interfaces in the weld joint of Ni-based superalloys SO ADVANCED ENGINEERING MATERIALS LA English DT Article C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Barabash, OM (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. EM barabashom@ornl.gov NR 8 TC 4 Z9 4 U1 0 U2 4 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 1438-1656 J9 ADV ENG MATER JI Adv. Eng. Mater. PD MAR PY 2006 VL 8 IS 3 BP 202 EP 205 DI 10.1002/adem.200500239 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA 026AJ UT WOS:000236308800015 ER PT J AU Gurvits, L AF Gurvits, L TI The Van der Waerden conjecture for mixed discriminants SO ADVANCES IN MATHEMATICS LA English DT Article DE matrices; determination; mixed discriminant; mixed volume; Alexandrov-Fenchel inequalities; convex analysis AB We prove that the mixed discrirninant of doubly stochastic n-tuples of semidefinite hermitian n x n rnatrices is bounded below by n!/n(n) and that this bound is uniquely attained at the n-tuple (1/nI,...1/nI). This result settles a conjecture posed by R. Bapat in 1989. We consider various generalizations and applications of this result. (c) 2005 Elsevier Inc. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Gurvits, L (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM gurvits@lanl.gov NR 20 TC 11 Z9 11 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0001-8708 J9 ADV MATH JI Adv. Math. PD MAR 1 PY 2006 VL 200 IS 2 BP 435 EP 454 DI 10.1016/j.aim.2004.12.002 PG 20 WC Mathematics SC Mathematics GA 016NH UT WOS:000235626400005 ER PT J AU Xu, XF Chen, SY Zhang, DX AF Xu, XF Chen, SY Zhang, DX TI Convective stability analysis of the long-term storage of carbon dioxide in deep saline aquifers SO ADVANCES IN WATER RESOURCES LA English DT Article DE geologic carbon sequestration; porous media; anisotropic permeability; linear stability analysis; global stability analysis ID ANISOTROPIC POROUS LAYER; NATURAL-CONVECTION; TEMPERATURE; ENERGY; ONSET; MEDIA AB Deep saline aquifers are one of the most suitable geologic formations for carbon sequestration. The linear and global stability analysis of the time-dependent density-driven convection in deep saline aquifers is presented for long-term storage of carbon dioxide (CO2). The convective mixing that can greatly accelerate the CO2 dissolution into saline aquifers arises because the density of brine increases upon the dissolution of CO2 and such a density difference may induce instability. The effects of anisotropic permeability on the stability criteria, such as the critical time for the appearance of convective phenomena and the critical wavelength of the most unstable perturbation, are investigated with linear and global stability analysis. The linear stability analysis provides a sufficient condition for instability while the global stability analysis yields a sufficient condition for stability. The results obtained from these two approaches are not exactly the same but show a consistent trend, both indicating that the anisotropic system becomes more unstable when either the vertical or horizontal permeability increases. (c) 2005 Elsevier Ltd. All rights reserved. C1 Univ Oklahoma, Norman, OK 73019 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Peking Univ, CCSE, Beijing 100871, Peoples R China. Peking Univ, LTCS, Beijing 100871, Peoples R China. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Zhang, DX (reprint author), Univ Oklahoma, Norman, OK 73019 USA. EM donzhang@ou.edu RI Zhang, Dongxiao/D-5289-2009; Chen, Shiyi/A-3234-2010 OI Zhang, Dongxiao/0000-0001-6930-5994; NR 16 TC 123 Z9 130 U1 2 U2 18 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 MAR PY 2006 VL 29 IS 3 BP 397 EP 407 DI 10.1016/j.advwatres.2005.05.008 PG 11 WC Water Resources SC Water Resources GA 007JM UT WOS:000234965000002 ER PT J AU Lo, WC Sposito, G Majer, E AF Lo, WC Sposito, G Majer, E TI Low-frequency dilatational wave propagation through fully-saturated poroelastic media SO ADVANCES IN WATER RESOURCES LA English DT Article DE low-frequency limit; dilatational wave; Biot theory; poroelastic ID POROUS-MEDIA; ELASTIC-WAVES; DISPERSION; ROCKS; MODEL; SAND AB The strong coupling of applied stress and pore fluid pressure, known as poroelasticity, is relevant to a number of applied problems arising in hydrogeology and reservoir engineering. The standard theory of poroelastic behavior in a homogeneous, isotropic, elastic porous medium saturated by a viscous, compressible fluid is due to Biot, who derived a pair of coupled partial differential equations that accurately predict the existence of two independent dilatational (compressional) wave motions, corresponding to in-phase and out-of-phase displacements of the solid and fluid phases, respectively. The Biot equations can be decoupled exactly after Fourier transformation to the frequency domain, but the resulting pair of Helmholtz equations cannot be converted to partial differential equations in the time domain and, therefore, closed-form analytical solutions of these equations in space and time variables cannot be obtained. In this paper we show that the decoupled Helmholtz equations can in fact be transformed to two independent partial differential equations in the time domain if the wave excitation frequency is very small as compared to a critical frequency equal to the kinematic viscosity of the pore fluid divided by the permeability of the porous medium. The partial differential equations found are a propagating wave equation and a dissipative wave equation, for which closed-form solutions are known under a variety of initial and boundary conditions. Numerical calculations indicate that the magnitude of the critical frequency for representative sedimentary materials containing either water or a nonaqueous phase liquid is in the kHz-MHz range, which is generally above the seismic band of frequencies. Therefore, the two partial differential equations obtained should be accurate for modeling elastic wave phenomena in fluid-saturated porous media under typical low-frequency conditions applicable to hydrogeological problems. (c) 2005 Elsevier Ltd. All rights reserved. C1 Natl Cheng Kung Univ, Dept Hydraul & Ocean Engn, Tainan 701, Taiwan. Lawrence Berkeley Natl Lab, Dept Geophys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA. RP Lo, WC (reprint author), Natl Cheng Kung Univ, Dept Hydraul & Ocean Engn, Tainan 701, Taiwan. EM lowc@mail.ncku.edu.tw NR 29 TC 13 Z9 15 U1 1 U2 3 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 MAR PY 2006 VL 29 IS 3 BP 408 EP 416 DI 10.1016/j.advwatres.2005.05.012 PG 9 WC Water Resources SC Water Resources GA 007JM UT WOS:000234965000003 ER PT J AU Zelenyuk, A Cai, Y Imre, D AF Zelenyuk, A Cai, Y Imre, D TI From agglomerates of spheres to irregularly shaped particles: Determination of dynamic shape factors from measurements of mobility and vacuum aerodynamic diameters SO AEROSOL SCIENCE AND TECHNOLOGY LA English DT Article ID SLIP CORRECTION MEASUREMENTS; AEROSOL-PARTICLES; NONSPHERICAL PARTICLES; MICROSTRUCTURAL REARRANGEMENT; DENSITY CHARACTERIZATION; UNIFORM SPHERES; WATER-VAPOR; DRAG FORCES; MORPHOLOGY; APPARATUS AB With the advent of advanced real-time aerosol instrumentation, it has become possible to simultaneously measure individual particle mobility and vacuum aerodynamic diameters. This paper presents an experimental exploration of the effect of particle shape on the relationship between mobility and vacuum aerodynamic diameters. We make measurements on systems of three types: ( 1) Agglomerates of spheres, for which the density and the volume are known; ( 2) Ammonium sulfate, sodium chloride, succinic acid and lauric acid irregularly shaped particles of known density; and ( 3) Internally mixed particles, containing organics and ammonium sulfate, of unknown density and shape. For agglomerates of spheres we observe and quantify alignment effects in the Differential Mobility Analyzer (DMA), an important consequence of which is that mobility diameter of aspherical particles can be a function of DMA operating voltages. We report the first measurements of the dynamic shape factors (DSFs) in free molecular regime. We report the first experimental determination of DSF for ammonium sulfate particles, for which we find DSF to increase from 1.03 to 1.07 as particle mobility diameter increases from 160 nm to 500 nm. Three types of NaCl particles were generated and characterized: nearly spherical particles with DSF of similar to 1.02; cubic with DSF that increases from 1.06 to 1.17 as particle mobility diameter increases; and compact agglomerates with DSF 1.3 - 1.4. Organic particles were found to be nearly spherical. The data suggest that addition of organics to ammonium sulfate particles lowers their DSF. C1 Pacific NW Natl Lab, Richland, WA 99354 USA. Imre Consulting, Richland, WA USA. RP Zelenyuk, A (reprint author), Pacific NW Natl Lab, POB 999,MSIN K8-88, Richland, WA 99354 USA. EM alla.zelenyuk@pnl.gov NR 45 TC 102 Z9 103 U1 5 U2 34 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 0278-6826 J9 AEROSOL SCI TECH JI Aerosol Sci. Technol. PD MAR PY 2006 VL 40 IS 3 BP 197 EP 217 DI 10.1080/02786820500529406 PG 21 WC Engineering, Chemical; Engineering, Mechanical; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 017QU UT WOS:000235708900002 ER PT J AU McMeeking, GR Kreidenweis, SM Lunden, M Carrillo, J Carrico, CM Lee, T Herckes, P Engling, G Day, DE Hand, J Brown, N Malm, WC Collett, JL AF McMeeking, Gavin R. Kreidenweis, Sonia M. Lunden, Melissa Carrillo, Jacqueline Carrico, Christian M. Lee, Taehyoung Herckes, Pierre Engling, Guenter Day, Derek E. Hand, Jennifer Brown, Nancy Malm, William C. Collett, Jeffrey L., Jr. TI Smoke-impacted regional haze in California during the summer of 2002 SO AGRICULTURAL AND FOREST METEOROLOGY LA English DT Article DE aerosol; smoke; regional scale; haze; carbon; wildland fire ID BIOMASS-BURNING EMISSIONS; YOSEMITE-NATIONAL-PARK; UNITED-STATES; PARTICULATE MATTER; AEROSOL; CARBON; IDENTIFICATION; COMBUSTION; VISIBILITY; PARTICLES AB Observations of aerosol physical, chemical, and optical properties made at 38 locations in Washington. Oregon. and California are presented to show the regional-scale influence of wildfire smoke during the summer of 2002. Aerosol measurements made during an intensive field campaign conducted in July, August, and September 2002 in Yosemite National Park indicated that smoke-impacted aerosols were present at the park during frequent haze episodes. In addition, backward trajectory analyses showed that large-scale meteorological conditions during the study were dominated by transport from western and southern Ore-on, a region with high fire activity during the summer of 2002. Observations of aerosol properties at the Yosemite NP site were remarkably similar, with similar temporal variations, to data from a second monitoring site at Blodgett Forest Research Station in the Sierra Nevada, approximately 150 km to the NNW. Further similarities to the temporal changes in aerosol properties as measured by monitoring networks with numerous sites in California and Oregon confirmed the regional nature of the haze. which had elevated fine aerosol particle mass concentrations compared with typical summertime average concentrations. The observations suggest that emissions from wild fires can have strong and sustained regional impacts on aerosol concentrations, air quality, and visibility. (c) 2006 Elsevier B.V. All rights reserved. C1 Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Colorado State Univ, CIRA, Ft Collins, CO 80523 USA. RP Kreidenweis, SM (reprint author), Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA. EM sonia@atmos.colostate.edu RI McMeeking, Gavin/A-7679-2008; Collett, Jeffrey/F-2862-2010; Herckes, Pierre/E-6824-2011; Xiongfei, Zhao/G-7690-2015; Engling, Guenter/Q-7833-2016; Kreidenweis, Sonia/E-5993-2011 OI McMeeking, Gavin/0000-0001-9782-3713; Collett, Jeffrey/0000-0001-9180-508X; Herckes, Pierre/0000-0002-0205-3187; Engling, Guenter/0000-0001-9954-0362; Kreidenweis, Sonia/0000-0002-2561-2914 NR 47 TC 31 Z9 32 U1 1 U2 25 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-1923 EI 1873-2240 J9 AGR FOREST METEOROL JI Agric. For. Meteorol. PD MAR 1 PY 2006 VL 137 IS 1-2 BP 25 EP 42 DI 10.1016/j.agrformet.2006.01.011 PG 18 WC Agronomy; Forestry; Meteorology & Atmospheric Sciences SC Agriculture; Forestry; Meteorology & Atmospheric Sciences GA 046TP UT WOS:000237834300003 ER PT J AU Grinstein, FF Liu, NS Oefelein, JC AF Grinstein, FF Liu, NS Oefelein, JC TI Introduction: combustion modeling and large eddy simulation: Development and validation needs for gas turbines SO AIAA JOURNAL LA English DT Editorial Material C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. NASA, John H Glenn Res Ctr Lewis Field, Cleveland, OH 44135 USA. Sandia Natl Labs, Livermore, CA USA. RP Grinstein, FF (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA. NR 2 TC 0 Z9 0 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0001-1452 J9 AIAA J JI AIAA J. PD MAR PY 2006 VL 44 IS 3 BP 417 EP 417 DI 10.2514/1.23184 PG 1 WC Engineering, Aerospace SC Engineering GA 021DI UT WOS:000235963300001 ER PT J AU Oefelein, JC Schefer, RW Barlow, RS AF Oefelein, JC Schefer, RW Barlow, RS TI Toward validation of large eddy simulation for turbulent combustion SO AIAA JOURNAL LA English DT Article ID CONDITIONAL MOMENT CLOSURE; SUBGRID-SCALE MODEL; NITRIC-OXIDE FORMATION; JET DIFFUSION FLAME; DENSITY-FUNCTION; COMPOSITIONAL STRUCTURE; CORRESPONDING STATES; TRANSPORT-PROPERTIES; NONPREMIXED FLAMES; PREMIXED FLAMES AB A quantitative overview focused on validation of the large eddy simulation (LES) technique for application to gas-turbine combustion processes is provided. The primary objective is to provide a systematic analysis of the current state of the art and assist in the development of technical performance metrics for model validation. Research is currently required to provide both improved multiphase combustion models and improved datasets for validation. Phenomenological requirements for further model development must be established through more detailed analyses of the space-time characteristics of small-scale turbulence-chemistry interactions. Concurrently, a refined set of implementation requirements must be established for LES, and a systematic hierarchy of databases for model validation must be developed. Steps taken toward these goals are described by focusing on validation requirements, boundary conditions, and the progressive implementation of LES in more complex configurations. First the distinct set of tradeoffs and requirments for LES are listed. A systematic progression of case studies that highlight key aspects related to the state of the art is then presented. In conclusion, recent findings associated with the International Workshop on Measurement and Computation of Turbulent Nonpremixed Flames, from the perspective of validation and model development for LES, are highlighted. C1 Sandia Natl Labs, Livermore, CA 94551 USA. RP Oefelein, JC (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA. EM oefelei@sandia.gov RI Schefer, Jurg/G-3960-2012 NR 62 TC 19 Z9 19 U1 2 U2 13 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0001-1452 J9 AIAA J JI AIAA J. PD MAR PY 2006 VL 44 IS 3 BP 418 EP 433 DI 10.2514/1.16425 PG 16 WC Engineering, Aerospace SC Engineering GA 021DI UT WOS:000235963300002 ER PT J AU Sidwell, T Richards, G Casleton, K Straub, D Maloney, D Strakey, P Ferguson, D Beer, S Woodruff, S AF Sidwell, T Richards, G Casleton, K Straub, D Maloney, D Strakey, P Ferguson, D Beer, S Woodruff, S TI Optically accessible pressurized research combustor for computational fluid dynamics model validation SO AIAA JOURNAL LA English DT Article ID PASSIVE CONTROL; INSTABILITY; FLAMES AB The development of, and results from, the operation of an optically accessible industrial-scale research combustor, designed to provide comprehensive data sets to assist the development of large eddy simulation codes for turbulent combustion applications is discussed. The combustor can he operated at elevated pressure and inlet air temperature, with precisely determined thermal, acoustic, and flow boundary conditions. The effect of fuel composition is investigated by augmenting the natural gas baseline fuel with hydrogen using a lean-premixed combustor configuration. A detailed description of the research combustor and test facility is provided, and recent data on the effects of hydrogen content and combustor heat losses on lean extinction limits, dynamic stability, and pollutant emissions are included. Analysis of the results confirm that heat losses in the combustor play an important role in pollutant formation and that characterization of the thermal boundary conditions is crucial in providing explicit data sets for model validation. C1 US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA. RP Sidwell, T (reprint author), US DOE, Natl Energy Technol Lab, POB 880, Morgantown, WV 26507 USA. EM Todd.Sidwell@net.doc.gov NR 32 TC 17 Z9 17 U1 0 U2 4 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0001-1452 J9 AIAA J JI AIAA J. PD MAR PY 2006 VL 44 IS 3 BP 434 EP 443 DI 10.2514/1.15197 PG 10 WC Engineering, Aerospace SC Engineering GA 021DI UT WOS:000235963300003 ER PT J AU Jung, JH Hassanein, A Lyczkowski, RW AF Jung, JH Hassanein, A Lyczkowski, RW TI Hemodynamic computation using multiphase flow dynamics in a right coronary artery SO ANNALS OF BIOMEDICAL ENGINEERING LA English DT Article DE multiphase; particulate buildup; computational fluid dynamics; wall shear stress; non-newtonian; secondary flow; cardiovascular disease ID ENDOTHELIAL SHEAR-STRESS; IN-VIVO; BLOOD-FLOW; WALL SHEAR; CONCENTRATED SUSPENSIONS; PLASMA VISCOSITY; FLUID-MECHANICS; ATHEROSCLEROSIS; CELLS; ERYTHROCYTES AB Hemodynamic data on the roles of physiologically critical blood particulates are needed to better understand cardiovascular diseases. The blood flow patterns and particulate buildup were numerically simulated using the multiphase non-Newtonian theory of dense suspension hemodynamics in a realistic right coronary artery (RCA) having various cross sections. The local hemodynamic factors, such as wall shear stress (WSS), red blood cell (RBC) buildup, viscosity, and velocity, varied with the spatially nonuniform vessel structures and temporal cardiac cycles. The model generally predicted higher RBC buildup on the inside radius of curvature. A low WSS region was found in the high RBC buildup region, in particular, on the area of maximum curvature of a realistic human RCA. The complex recirculation patterns, the oscillatory flow with flow reversal, and vessel geometry resulted in RBC buildup due to the prolonged particulate residence time, specifically, at the end of the diastole cycle. The increase of the initial plasma viscosity caused the lower WSS. These predictions have significant implications for understanding the local hemodynamic phenomena that may contribute to the earliest stage of atherosclerosis, as clinically observed on the inside curvatures and torsion of coronary arteries. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. RP Jung, JH (reprint author), Argonne Natl Lab, Div Energy Technol, Bldg 308,9700 S Cass Ave, Argonne, IL 60439 USA. EM jungjh@anl.gov NR 69 TC 36 Z9 37 U1 0 U2 6 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0090-6964 J9 ANN BIOMED ENG JI Ann. Biomed. Eng. PD MAR PY 2006 VL 34 IS 3 BP 393 EP 407 DI 10.1007/s10439-005-9017-0 PG 15 WC Engineering, Biomedical SC Engineering GA 035DL UT WOS:000236980300004 PM 16477502 ER PT J AU Densmore, JD AF Densmore, JD TI Interface methods for hybrid Monte Carlo-diffusion radiation-transport simulations SO ANNALS OF NUCLEAR ENERGY LA English DT Article ID MEAN FREE PATHS AB Discrete diffusion Monte Carlo (DDMC) is a technique for increasing the efficiency of Monte Carlo simulations in diffusive media. An important aspect of DDMC is the treatment of interfaces between diffusive regions, where DDMC is used, and transport regions, where standard Monte Carlo is employed. Three previously developed methods exist for treating transport-diffusion interfaces: the Marshak interface method, based on the Marshak boundary condition, the asymptotic interface method, based on the asymptotic diffusion-limit boundary condition, and the Nth-collided source technique, a scheme that allows Monte Carlo particles to undergo several collisions in a diffusive region before DDMC is used. Numerical calculations have shown that each of these interface methods gives reasonable results as part of larger radiation-transport simulations. In this paper, we use both analytic and numerical examples to compare the ability of these three interface techniques to treat simpler, transport-diffusion interface problems outside of a more complex radiation-transport calculation. We find that the asymptotic interface method is accurate regardless of the angular distribution of Monte Carlo particles incident on the interface surface. In contrast, the Marshak boundary condition only produces correct solutions if the incident particles are isotropic. We also show that the Nth-collided source technique has the capacity to yield accurate results if spatial cells are optically small and Monte Carlo particles are allowed to undergo many collisions within a diffusive region before DDMC is employed. These requirements make the Nth-collided source technique impractical for realistic radiation-transport calculations. (c) 2005 Elsevier Ltd. All rights reserved. C1 Los Alamos Natl Lab, Transport Methods Grp, Los Alamos, NM 87545 USA. RP Densmore, JD (reprint author), Los Alamos Natl Lab, Transport Methods Grp, CCS 4,POB 1663,MS D409, Los Alamos, NM 87545 USA. EM jdd@lanl.gov NR 13 TC 7 Z9 7 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0306-4549 J9 ANN NUCL ENERGY JI Ann. Nucl. Energy PD MAR PY 2006 VL 33 IS 4 BP 343 EP 353 DI 10.1016/j.anucene.2005.11.007 PG 11 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 027PT UT WOS:000236428200005 ER PT J AU Pritychenko, B Sonzogni, AA Winchell, DF Zerkin, VV Arcilla, R Burrows, TW Dunford, CL Herman, MW McLane, V Oblozinsky, P Sanborn, Y Tull, JK AF Pritychenko, B Sonzogni, AA Winchell, DF Zerkin, VV Arcilla, R Burrows, TW Dunford, CL Herman, MW McLane, V Oblozinsky, P Sanborn, Y Tull, JK TI Nuclear reaction and structure data services of the National Nuclear Data Center SO ANNALS OF NUCLEAR ENERGY LA English DT Article ID STRUCTURE DATA FILE; REFERENCES; DATABASES AB The mission of the National Nuclear Data Center (NNDC) includes collection, evaluation, and dissemination of nuclear physics data for basic nuclear research and applied nuclear technologies. In 2004, to answer the needs of nuclear data users, NNDC completed a project to modernize storage and management of its databases and began offering new nuclear data Web services. The principles of database and Web application development used at NNDC are described. Examples of nuclear structure, nuclear reaction and bibliographical database applications along with a number of nuclear science tools and codes are presented. (c) 2005 Elsevier Ltd. All rights reserved. C1 Natl Nucl Data Ctr, Brookhaven Natl Lab, Upton, NY 11973 USA. IAEA, Nucl Data Sect, A-1400 Vienna, Austria. RP Pritychenko, B (reprint author), Natl Nucl Data Ctr, Brookhaven Natl Lab, Upton, NY 11973 USA. EM pritychenko@bnl.gov NR 35 TC 16 Z9 16 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0306-4549 J9 ANN NUCL ENERGY JI Ann. Nucl. Energy PD MAR PY 2006 VL 33 IS 4 BP 390 EP 399 DI 10.1016/j.anucene.2005.10.004 PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 027PT UT WOS:000236428200010 ER PT J AU Priester, JH Olson, SG Webb, SM Neu, MP Hersman, LE Holden, PA AF Priester, JH Olson, SG Webb, SM Neu, MP Hersman, LE Holden, PA TI Enhanced exopolymer production and chromium stabilization in Pseudomonas putida unsaturated biofilms SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID CHROMATE RETENTION MECHANISMS; HEXAVALENT CHROMIUM; HEAVY-METALS; IN-VITRO; BACTERIAL BIOFILMS; EXTRACELLULAR DNA; CROSS-LINKS; CELL-WALL; REDUCTION; AERUGINOSA AB Chromium-contaminated soils threaten surface and groundwater quality at many industrial sites. In vadose zones, indigenous bacteria can reduce Cr(VI) to Cr(III), but the subsequent fate of Cr(III) and the roles of bacterial biofilms are relatively unknown. To investigate, we cultured Pseudomonas putida, a model organism for vadose zone bioremediation, as unsaturated biofilms on membranes overlaying iron-deficient solid media either containing molecular dichromate from potassium dichromate (Cr-only treatment) or with deposits of solid, dichromate-coated hematite (Fe+Cr treatment) to simulate vadose zone conditions. Controls included iron-deficient solid medium and an Fe-only treatment using solid hematite deposits. Under iron-deficient conditions, chromium exposure resulted in lower cell yield and lower amounts of cellular protein and carbohydrate, but providing iron in the form of hematite overcame these toxic effects of Cr. For the Cr and Fe+Cr treatments, Cr(VI) was completely reduced to Cr(III) that accumulated on biofilm cells and extracellular polymeric substances (EPSs). Chromium exposure resulted in elevated extracellular carbohydrates, protein, DNA, and EPS sugars that were relatively enriched in Ar-acetyl-glucosamine, rhamnose, glucose, and mannose. The proportions of EPS protein and carbohydrate relative to intracellular pools suggested Cr toxicity-mediated cell lysis as the origin. However, DNA accumulated extracellularly in amounts far greater than expected from cell lysis, and Cr was liberated when extracted EPS was treated with DNase. These results demonstrate that Cr accumulation in unsaturated biofilms occurs with enzymatic reduction of Cr(VI), cellular lysis, cellular association, and extracellular DNA binding of Cr(III), which altogether can facilitate localized biotic stabilization of Cr in contaminated vadose zones. C1 Univ Calif Santa Barbara, Donald Breen Sch Environm Sci & Management, Santa Barbara, CA 93106 USA. Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Holden, PA (reprint author), Univ Calif Santa Barbara, Donald Breen Sch Environm Sci & Management, Santa Barbara, CA 93106 USA. EM holden@bren.ucsb.edu RI Webb, Samuel/D-4778-2009 OI Webb, Samuel/0000-0003-1188-0464 NR 74 TC 87 Z9 92 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 MAR PY 2006 VL 72 IS 3 BP 1988 EP 1996 DI 10.1128/AEM.72.3.1988-1996.2006 PG 9 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 022PX UT WOS:000236069200033 PM 16517647 ER PT J AU Starkenburg, SR Chain, PSG Sayavedra-Soto, LA Hauser, L Land, ML Larimer, FW Malfatti, SA Klotz, MG Bottomley, PJ Arp, DJ Hickey, WJ AF Starkenburg, SR Chain, PSG Sayavedra-Soto, LA Hauser, L Land, ML Larimer, FW Malfatti, SA Klotz, MG Bottomley, PJ Arp, DJ Hickey, WJ TI Genome sequence of the chemolithoautotrophic nitrite-oxidizing bacterium Nitrobacter winogradskyi Nb-255 SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Review ID CARBON-MONOXIDE DEHYDROGENASE; RHIZOBIUM SINORHIZOBIUM MELILOTI; GRAM-NEGATIVE BACTERIA; ESCHERICHIA-COLI; PSEUDOMONAS-AERUGINOSA; NITROSOMONAS-EUROPAEA; OLIGOTROPHA-CARBOXIDOVORANS; BRADYRHIZOBIUM-JAPONICUM; MEGAPLASMID PHCG3; MEMBRANE-PROTEINS AB The alphaproteobacterium Nitrobacter winogradskyi (ATCC 25391) is a gram-negative facultative chemolithoautotroph capable of extracting energy from the oxidation of nitrite to nitrate. Sequencing and analysis of its genome revealed a single circular chromosome of 3,402,093 bp encoding 3,143 predicted proteins. There were extensive similarities to genes in two alphaproteobacteria, Bradyrhizobium japonicum USDA110 (1,300 genes) and Rhodopseudomonas palustris CGA009 CG (815 genes). Genes encoding pathways for known modes of chemolithotrophic and chemoorganotrophic growth were identified. Genes encoding multiple enzymes involved in anapleurotic reactions centered on C-2 to C-4 metabolism, including a glyoxylate bypass, were annotated. The inability of N. winogradskyi to grow on C-6 molecules is consistent with the genome sequence, which lacks genes for complete Embden-Meyerhof and Entner-Doudoroff pathways, and active uptake of sugars. Two gene copies of the nitrite oxidoreductase, type I iibulose-1,5-bisphosphate carboxylase/oxygenase, cytochrome c oxidase, and gene homologs encoding an aerobic-type carbon monoxide dehydrogenase were present. Similarity of nitrite oxidoreductases to respiratory nitrate reductases was confirmed. Approximately 10% of the N. winogradskyi genome codes for genes involved in transport and secretion, including the presence of transporters for various organic-nitrogen molecules. The N. winogradskyi genome provides new insight into the phylogenetic identity and physiological capabilities of nitrite-oxidizing bacteria. The genome will serve as a model to study the cellular and molecular processes that control nitrite oxidation and its interaction with other nitrogen-cycling processes. C1 Univ Wisconsin, Dept Soil Sci, Madison, WI 53706 USA. Oregon State Univ, Corvallis, OR 97331 USA. Joint Genome Inst, Walnut Creek, CA 94598 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Louisville, Louisville, KY 40292 USA. RP Hickey, WJ (reprint author), Univ Wisconsin, Dept Soil Sci, 1525 Observ Dr, Madison, WI 53706 USA. EM wjhickey@wisc.edu RI Land, Miriam/A-6200-2011; Hauser, Loren/H-3881-2012; chain, patrick/B-9777-2013; Klotz, Martin/D-2091-2009 OI Land, Miriam/0000-0001-7102-0031; Klotz, Martin/0000-0002-1783-375X NR 105 TC 82 Z9 429 U1 9 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 MAR PY 2006 VL 72 IS 3 BP 2050 EP 2063 DI 10.1128/AEM.72.3.2050-2063.2006 PG 14 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 022PX UT WOS:000236069200040 PM 16517654 ER PT J AU Imachi, H Sekiguchi, Y Kamagata, Y Loy, A Qiu, YL Hugenholtz, P Kimura, N Wagner, M Ohashi, A Harada, H AF Imachi, H Sekiguchi, Y Kamagata, Y Loy, A Qiu, YL Hugenholtz, P Kimura, N Wagner, M Ohashi, A Harada, H TI Non-sulfate-reducing, syntrophic bacteria affiliated with Desulfotomaculum cluster I are widely distributed in methanogenic environments SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID 16S RIBOSOMAL-RNA; PROPIONATE-OXIDIZING BACTERIUM; TARGETED OLIGONUCLEOTIDE PROBES; BILOPHILA-WADSWORTHIA RZATAU; MULTIPLE LATERAL TRANSFERS; POLYMERASE CHAIN-REACTION; RICE FIELD SOIL; GEN. NOV.; SYNTROPHOBACTER-WOLINII; MICROBIAL-POPULATIONS AB The classical perception of members of the gram-positive Desulfotomaculum cluster I as sulfate-reducing bacteria was recently challenged by the isolation of new representatives lacking the ability for anaerobic sulfate respiration. For example, the two described syntrophic propionate-oxidizing species of the genus Pelotomaculum form the novel Desulfotomaculum subcluster Ih. In the present study, we applied a polyphasic approach by using cultivation-independent and culturing techniques in order to further characterize the occurrence, abundance, and physiological properties of subcluster Ih bacteria in low-sulfate, methanogenic environments. 16S rRNA (gene)-based cloning, quantitative fluorescence in situ hybridization, and real-time PCR analyses showed that the subcluster Ih population composed a considerable part of the Desulfotomaculum cluster I community in almost all samples examined. Additionally, five propionate-degrading syntrophic enrichments of subeluster Ih bacteria were successfully established, from one of which the new strain MGP was isolated in coculture with a hydrogenotrophic methanogen. None of the cultures analyzed, including previously described Pelotomaculum species and strain MGP, consumed sulfite, sulfate, or organosulfonates. In accordance with these phenotypic observations, a PCR-based screening for dsrAB (key genes of the sulfate respiration pathway encoding the alpha and beta subunits of the dissimilatory sulfite reductase) of all enrichments/ (co) cultures was negative with one exception. Surprisingly, strain MGP contained dsrAB, which were transcribed in the presence and absence of sulfate. Based on these and previous findings, we hypothesize that members of Desulfotomaculum subcluster Ih have recently adopted a syntrophic lifestyle to thrive in low-sulfate, methanogenic environments and thus have lost their ancestral ability for dissimilatory sulfate/sulfite reduction. C1 Nagaoka Univ Technol, Dept Environm Syst Engn, Nagaoka, Niigata 9402188, Japan. Natl Inst Adv Ind Sci & Technol, Inst Biol Resources & Funct, Tsukuba, Ibaraki 3058566, Japan. Univ Vienna, Dept Microbial Ecol, A-1090 Vienna, Austria. DOE, Joint Genome Inst, Microbial Ecol Program, Walnut Creek, CA USA. RP Imachi, H (reprint author), Nagaoka Univ Technol, Dept Environm Syst Engn, 1603-1 Kamitomioka, Nagaoka, Niigata 9402188, Japan. EM imachi@vos.nagaokaut.ac.jp RI Loy, Alexander/A-8182-2008; Imachi, Hiroyuki/D-3298-2009; Hugenholtz, Philip/G-9608-2011; Ohashi, Akiyoshi/H-4744-2011; Harada, Hideki/F-1057-2014; Wagner, Michael/A-7801-2011; OI Loy, Alexander/0000-0001-8923-5882; Wagner, Michael/0000-0002-9778-7684; hugenholtz, philip/0000-0001-5386-7925 FU Austrian Science Fund FWF [P 18836] NR 59 TC 109 Z9 110 U1 4 U2 33 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 MAR PY 2006 VL 72 IS 3 BP 2080 EP 2091 DI 10.1128/AEM.72.3.2080-2091.2006 PG 12 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 022PX UT WOS:000236069200043 PM 16517657 ER PT J AU van der Lelie, D Lesaulnier, C McCorkle, S Geets, J Taghavi, S Dunn, J AF van der Lelie, D Lesaulnier, C McCorkle, S Geets, J Taghavi, S Dunn, J TI Use of single-point genome signature tags as a universal tagging method for microbial genome surveys SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID 16S RIBOSOMAL-RNA; STREPTOCOCCUS-PNEUMONIAE; PROKARYOTIC DIVERSITY; COMMUNITY STRUCTURE; VIRAL COMMUNITY; EXCISION-REPAIR; SERIAL ANALYSIS; DNA; SEQUENCE; BACTERIA AB We developed single-point genome signature tags (SP-GSTs), a generally applicable, high-throughput sequencing-based method that targets specific genes to generate identifier tags from well-defined points in a genome. The technique yields identifier tags that can distinguish between closely related bacterial strains and allow for the identification of microbial community members. SP-GSTs are determined by three parameters: (i) the primer designed to recognize a conserved gene sequence, (ii) the anchoring enzyme recognition sequence, and (iii) the type US restriction enzyme which defines the tag length. We evaluated the SP-GST method in silico for bacterial identification using the genes rpoC, uvrB, and recA and the 16S rRNA gene. The best distinguishing tags were obtained with the restriction enzyme Csp6I upstream of the 16S rRNA gene, which discriminated all organisms in our data set to at least the genus level and most organisms to the species level. The method was successfully used to generate Csp6I-based tags upstream of the 16S rRNA gene and allowed us to discriminate between closely related strains of Bacillus cereus and Bacillus anthracis. This concept was further used successfully to identify the individual members of a defined microbial community. C1 Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. Univ Aix Marseille 1, ESIL, IRD, UR 101,IFR,BAIM, F-13288 Marseille 09, France. Univ Hasselt, B-3590 Diepenbeek, Belgium. RP van der Lelie, D (reprint author), Brookhaven Natl Lab, Dept Biol, Bldg 463, Upton, NY 11973 USA. EM vdlelied@bnl.gov FU NIAID NIH HHS [U01 AI056480-01, U01 AI056480] NR 32 TC 14 Z9 15 U1 0 U2 1 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 MAR PY 2006 VL 72 IS 3 BP 2092 EP 2101 DI 10.1128/AEM.72.3.2092-2101.2006 PG 10 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 022PX UT WOS:000236069200044 PM 16517658 ER PT J AU McMillan, JD AF McMillan, James D. TI Introduction to the proceeding of the twenty-seventh symposium on biotechnology for fuels and chemicals SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP McMillan, JD (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD MAR PY 2006 VL 132 IS 1-3 BP III EP VIII PG 6 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA V44LV UT WOS:000203005100001 ER PT J AU McMillan, JD AF McMillan, James D. TI Introduction to the proceedings of the twenty-seventh symposium on biotechnology for fuels and chemicals SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP McMillan, JD (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD MAR PY 2006 VL 131 IS 1-3 BP III EP viii PG 6 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA V44LU UT WOS:000203005000001 PM 18563641 ER PT J AU Gidh, A Talreja, D Vinzant, TB Williford, TC Mikell, A AF Gidh, Aarti Talreja, Dinesh Vinzant, Todd B. Williford, Todd Clint Mikell, Alfred TI Detailed analysis of modifications in lignin after treatment with cultures screened for lignin depolymerizing agents SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article DE lignin; beetles; NIR; HPLC; AFM; depolymerization ID SP. STRAIN BOS55; MODEL COMPOUNDS; AEROBIC-BACTERIA; KRAFT LIGNIN; DEGRADATION; POLYMERIZATION; TERMITES; SYSTEM; FUNGI; WHEAT AB Termites, beetles, and other arthropods can digest living and decaying wood plus other lignocellulosic plant litter. Microbial sources like other wood-eating insect guts and wastewater treatment sludge were screened for lignin depolymerization. Near infrared spectroscopy and atomic force microscopy (AFM) along with high-performance liquid chromatography (HPLC), were used to track changes in functional groups, size, shape, and molecular weight of lignin molecules during incubations. Odontotaenius disjunctus (Betsy beetle) guts dissected whole or separately as midgut, foregut, and hindgut, consumed corn stover but did not show lignin depolymerization. The sludge-treated lignin did show some reduction in molecular weight on the HPLC, particle size (350-650 nm initially to 135-220 nm by day 30) and particles per field on AFM. pH and the presence of nutrients had a substantial effect on the extent of depolymerization. Cultures in lignin and nutrients showed higher growth than cultures with lignin only. Colony characteristics within the beetle gut and the sludge were also evaluated. C1 [Gidh, Aarti; Williford, Todd Clint] Univ Mississippi, Dept Chem Engn, University, MS 38677 USA. [Talreja, Dinesh; Mikell, Alfred] Univ Mississippi, Dept Biol, University, MS 38677 USA. [Vinzant, Todd B.] Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO 80401 USA. RP Gidh, A (reprint author), Univ Mississippi, Dept Chem Engn, University, MS 38677 USA. EM agidh@olemiss.edu NR 29 TC 1 Z9 1 U1 2 U2 12 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 EI 1559-0291 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD MAR PY 2006 VL 131 IS 1-3 BP 829 EP 843 DI 10.1385/ABAB:131:1:829 PG 15 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA V44LU UT WOS:000203005000017 PM 18563657 ER PT J AU Borole, AP Klasson, KT Ridenour, W Holland, J Karim, K Al-Dahhan, MH AF Borole, Abhijeet P. Klasson, K. Thomas Ridenour, Whitney Holland, Justin Karim, Khursheed Al-Dahhan, Muthanna H. TI Methane production in a 100-L upflow bioreactor by anaerobic digestion of farm waste SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article DE anaerobic digestion; animal manure; gas recirculation; mixing; biogas AB Manure waste from dairy farms has been used for methane production for decades, however, problems such as digester failure are routine. The problem has been investigated in small scale (1-2 L) digesters in the laboratory; however, very little scale-up to intermediate scales are available. We report production of methane in a 100-L digester and the results of an investigation into the effect of partial mixing induced by gas upflow/recirculation in the digester. The digester was operated for a period of about 70 d (with 16-d hydraulic retention time) with and without the mixing induced by gas recirculation through an internal draft tube. The results show a clear effect of mixing on digester operation. Without any mixing, the digester performance deteriorated within 30-50 d, whereas with mixing continuous production of methane was observed. This study demonstrates the importance of mixing and its critical role in design of large scale anaerobic digesters. C1 [Klasson, K. Thomas] ARS, USDA, So Reg Res Ctr, New Orleans, LA 70124 USA. [Borole, Abhijeet P.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Ridenour, Whitney; Holland, Justin] Oak Ridge Associated Univ, Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37830 USA. [Karim, Khursheed; Al-Dahhan, Muthanna H.] Washington Univ, Dept Chem Engn, CREL, St Louis, MO 63130 USA. RP Klasson, KT (reprint author), ARS, USDA, So Reg Res Ctr, 1100 Robert E Lee Blvd, New Orleans, LA 70124 USA. EM tklasson@srrc.ars.usda.gov RI Borole, AP/F-3933-2011; OI Klasson, K. Thomas/0000-0003-3358-3081; Borole, Abhijeet/0000-0001-8423-811X NR 17 TC 11 Z9 11 U1 0 U2 1 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD MAR PY 2006 VL 131 IS 1-3 BP 887 EP 896 DI 10.1385/ABAB:131:1:887 PG 10 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA V44LU UT WOS:000203005000024 PM 18563663 ER PT J AU Klasson, KT Borole, AP McKeown, CK Hamilton, CY AF Klasson, K. Thomas Borole, Abhijeet P. McKeown, Catherine K. Hamilton, Choo Y. TI Biomodification of coal to remove mercury SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article DE bioleaching; mercury; coal; ferrooxidans ID BITUMINOUS COAL; MILD PYROLYSIS; FERROOXIDANS; BIOFILM; FATE AB A biological process for removal of mercury from coal is under investigation. Iron and sulfur oxidizing bacteria have previously been used for desulfurization of coal and for mineral mining. We have shown that removal of mercury from coal is also possible via the same principles. Two pure cultures, Leptospirillum ferrooxidans and Acidithiobacillus ferrooxidans and four environmental consortium samples obtained from an acid mine drainage site were studied for mercury removal from coal. Four different coal samples were included in the study and the preliminary results have shown that up to 20% of the mercury can be removed in batch cultures compared to control. Additional parameters such as media composition and inoculum size were also studied. This is the first report demonstrating successful leaching of mercury from coal using biological treatment. C1 [Klasson, K. Thomas; Borole, Abhijeet P.; McKeown, Catherine K.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Hamilton, Choo Y.] Univ Tennessee, Knoxville, TN 37996 USA. RP Borole, AP (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM borolea@ornl.gov RI Borole, AP/F-3933-2011; OI Klasson, K. Thomas/0000-0003-3358-3081; Borole, Abhijeet/0000-0001-8423-811X NR 26 TC 3 Z9 3 U1 0 U2 4 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 EI 1559-0291 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD MAR PY 2006 VL 131 IS 1-3 BP 897 EP 908 PG 12 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA V44LU UT WOS:000203005000025 PM 18563664 ER PT J AU McMillan, JD AF McMillan, James D. TI Introduction to the Proceedings of the Twenty-Seventh Symposium on Biotechnology for Fuels and Chemicals SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP McMillan, JD (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD MAR PY 2006 VL 130 IS 1-3 BP III EP VIII PG 6 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA V44LT UT WOS:000203004900001 ER PT J AU Davison, BH Drescher, SR Tuskan, GA Davis, MF Nghiem, NP AF Davison, Brian H. Drescher, Sadie R. Tuskan, Gerald A. Davis, Mark F. Nghiem, Nhuan P. TI Variation of S/G ratio and lignin content in a Populus family influences the release of xylose by dilute acid hydrolysis SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article DE cell wall chemistry; genetic variation; hybrid poplar; hydrolysis; lignin AB Wood samples from a second generation Populus cross were shown to have different lignin contents and S/G ratios (S: syringyl-like lignin structures; G: guaiacyl-like lignin structures). The lignin contents varied from 22.7% to 25.8% and the S/G ratio from 1.8 to 2.3. Selected samples spanning these ranges were hydrolyzed with dilute (1%) sulfuric acid to release fermentable sugars. The conditions were chosen for partial hydrolysis of the hemicellulosic fraction to maximize the expression of variation among samples. The results indicated that both lignin contents and S/G ratio significantly affected the yield of xylose. For example, the xylose yield of the 25.8% lignin and 2.3 S/G ( high lignin, high S/G) sample produced 30% of the theoretical yield, whereas the xylose yield of the 22.7% lignin and 1.8 S/G ( low lignin, low S/G) was 55% of the theoretical value. These results indicate that lignin content and composition among genetic variants within a single species can influence the hydrolyzability of the biomass. C1 [Davison, Brian H.; Drescher, Sadie R.; Tuskan, Gerald A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Davis, Mark F.] Natl Renewable Energy Lab, Golden, CO 80401 USA. [Nghiem, Nhuan P.] Market Biosci Corp, Winchester 40391, KY, England. RP Davison, BH (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM davisonbh@ornl.gov RI Tuskan, Gerald/A-6225-2011; Davison, Brian/D-7617-2013; OI Tuskan, Gerald/0000-0003-0106-1289; Davison, Brian/0000-0002-7408-3609; davis, mark/0000-0003-4541-9852 NR 15 TC 68 Z9 70 U1 2 U2 34 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD MAR PY 2006 VL 130 IS 1-3 BP 427 EP 435 DI 10.1385/ABAB:130:1:427 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA V44LT UT WOS:000203004900009 ER PT J AU Viamajala, S Selig, MJ Vinzant, TB Tucker, MP Himmel, ME McMillan, JD Decker, SR AF Viamajala, Sridhar Selig, Michael J. Vinzant, Todd B. Tucker, Melvin P. Himmel, Michael E. McMillan, James D. Decker, Stephen R. TI Catalyst transport in corn stover internodes - Elucidating transport mechanisms using Direct Blue-I SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article DE biomass conversion; internode transport; dilute acid pretreatment; Direct Blue-I; biomass recalcitrance AB The transport of catalysts (chemicals and enzymes) within plant biomass is believed to be a major bottleneck during thermochemical pretreatment and enzymatic conversion of lignocellulose. Subjecting biomass to size reduction and mechanical homogenization can reduce catalyst transport limitations; however, such processing adds complexity and cost to the overall process. Using high-resolution light microscopy, we have monitored the transport of an aqueous solution of Direct Blue-I (DB-I) dye through intact corn internodes under a variety of impregnation conditions. DB-I is a hydrophilic anionic dye with affinity for cellulose. This model system has enabled us to visualize likely barriers and mechanisms of catalyst transport in corn stems. Microscopic images were compared with calculated degrees of saturation (i.e., volume fraction of internode void space occupied by dye solution) to correlate impregnation strategies with dye distribution and transport mechanisms. Results show the waxy rind exterior and air trapped within individual cells to be the major barriers to dye transport, whereas the vascular bundles, apoplastic continuum (i.e., the intercellular void space at cell junctions), and fissures formed during the drying process provided the most utilized pathways for transport. Although representing only 20-30% of the internode volume, complete saturation of the apoplast and vascular bundles by fluid allowed dye contact with a majority of the cells in the internode interior. C1 [Viamajala, Sridhar; Selig, Michael J.; Vinzant, Todd B.; Tucker, Melvin P.; Himmel, Michael E.; McMillan, James D.; Decker, Stephen R.] Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO 80401 USA. RP Viamajala, S (reprint author), Natl Renewable Energy Lab, Natl Bioenergy Ctr, 1617 Cole Blvd, Golden, CO 80401 USA. EM Sridhar_viamajala@nrel.gov NR 16 TC 8 Z9 8 U1 0 U2 2 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD MAR PY 2006 VL 130 IS 1-3 BP 509 EP 527 DI 10.1385/ABAB:130:1:509 PG 19 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA V44LT UT WOS:000203004900016 ER PT J AU Zhu, YM Kim, TH Lee, YY Chen, RG Elander, RT AF Zhu, Yongming Kim, Tae Hyun Lee, Y. Y. Chen, Rongfu Elander, Richard T. TI Enzymatic production of xylooligosaccharides from corn stover and corn cobs treated with aqueous ammonia SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article DE corn stover; corn cobs; xylooligosaccharides; xylan; aqueous ammonia; pretreatment; endoxylanase AB A novel method of producing food-grade xylooligosaccharides from corn stover and corn cobs was investigated. The process starts with pretreatment of feedstock in aqueous ammonia, which results delignified and xylan-rich substrate. The pretreated substrates are subjected to enzymatic hydrolysis of xylan using endoxylanase for production of xylooligosaccharides. The conventional enzyme-based method involves extraction of xylan with a strong alkaline solution to form a liquid intermediate containing soluble xylan. This intermediate is heavily contaminated with various extraneous components. A costly purification step is therefore required before enzymatic hydrolysis. In the present method, xylan is obtained in solid form after pretreatment. Water-washing is all that is required for enzymatic hydrolysis of this material. The complex step of purifying soluble xylan from contaminant is essentially eliminated. Refining of xylooligosaccharides to food-grade is accomplished by charcoal adsorption followed by ethanol elution. Xylanlytic hydrolysis of the pretreated corn stover yielded glucan-rich residue that is easily digestible by cellulase enzyme. The digestibility of the residue reached 86% with enzyme loading of 10 filter paper units/g-glucan. As a feedstock for xylooligosaccharides production, corn cobs are superior to corn stover because of high xylan content and high packing density. The high packing density of corn cobs reduces water input and eventually raises the product concentration. C1 [Zhu, Yongming; Kim, Tae Hyun; Lee, Y. Y.] Auburn Univ, Dept Chem Engn, Auburn, AL 36849 USA. [Chen, Rongfu] SNC Lavalin GDS Inc, Houston, TX 77096 USA. [Elander, Richard T.] Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO 80401 USA. RP Lee, YY (reprint author), Auburn Univ, Dept Chem Engn, Auburn, AL 36849 USA. EM yylee@eng.auburn.edu OI Kim, Tae Hyun/0000-0002-2225-1199 NR 19 TC 16 Z9 16 U1 1 U2 14 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD MAR PY 2006 VL 130 IS 1-3 BP 586 EP 598 DI 10.1385/ABAB:130:1:586 PG 13 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA V44LT UT WOS:000203004900021 ER PT J AU McMillan, JD AF McMillan, James D. TI Introduction to the proceedings of the twenty-seventh symposium on biotechnology for fuels and chemicals SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP McMillan, JD (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD MAR PY 2006 VL 129 IS 1-3 BP III EP VIII PG 6 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA V44LS UT WOS:000203004800001 ER PT J AU Stout, SA Cho, YC Komarneni, S AF Stout, SA Cho, YC Komarneni, S TI Uptake of cesium and strontium cations by potassium-depleted phlogopite SO APPLIED CLAY SCIENCE LA English DT Article DE phlogopite; mica; cesium; strontium; ion exchange; radionuclides ID ION-EXCHANGE MATERIALS; ZIRCONIUM PHOSPHATE; REMOVAL; SELECTIVITY; WASTES; MICA AB Phlogopite mica was equilibrated with 1.0 N sodium chloride (NaCl)-0.2 N sodium tetraphenylborate (NaTPB)-0.01 M disodium ethylenediaminetetraacetic acid (EDTA) solution at room temperature resulting in an almost complete removal (92%) of the mica's interlayer K. X-ray powder diffraction analysis provides additional evidence that hydrated Na+ ions had almost completely replaced the interlayer K. Following equilibration, the c-axis spacing of the mica increased from 10.0 angstrom to approximately 12.2 angstrom. Cesium and Sr ion exchange isotherms indicate that K-depleted pblogopite is highly selective for both elements, the Cs+ exchange capacity is 1.26 meq/g or 65% of the theoretical cation exchange capacity and the Sr2+ exchange capacity is 1.94 meq/g or 100% of the theoretical exchange capacity of the mica. Kielland plots indicated that the mica was selective for Cs+ when the equivalent exchange capacity of Cs+ in the exchanger phase ((X) over bar (Cs)) was < 0.66 and selective for Sr2+ when (X) over bar (Sr)< 0.41. At equivalent fractions greater than these levels, layer collapse and/or steric effects limit the diffusion of these ions into the interlayers of the mica. Analysis of the Cs+ equilibrated mica utilizing XRD indicated that a collapse of the c-axis spacing had occurred. Based on the high selectivity of < 45-mu m K-depleted phlogopite for Sr2+ and Cs+, this material may prove useful as an inorganic ion exchanger for these radioactive isotopes. (c) 2005 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Div Chem, CSIC, Los Alamos, NM 87545 USA. Penn State Univ, Dept Crop & Soil Sci, University Pk, PA 16802 USA. Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA. RP Stout, SA (reprint author), Los Alamos Natl Lab, Div Chem, CSIC, POB 1663, Los Alamos, NM 87545 USA. EM stout@lanl.gov NR 31 TC 21 Z9 22 U1 1 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-1317 J9 APPL CLAY SCI JI Appl. Clay Sci. PD MAR PY 2006 VL 31 IS 3-4 BP 306 EP 313 DI 10.1016/j.clay.2005.10.008 PG 8 WC Chemistry, Physical; Materials Science, Multidisciplinary; Mineralogy SC Chemistry; Materials Science; Mineralogy GA 022VT UT WOS:000236084900015 ER PT J AU Feldstein, A Neves, KW Thompson, S AF Feldstein, A Neves, KW Thompson, S TI Sharpness results for state dependent delay differential equations: An overview SO APPLIED NUMERICAL MATHEMATICS LA English DT Article; Proceedings Paper CT 3rd International Conference on Numerical Solutions of Volterra and Delay Equations CY MAY, 2004 CL Tempe, AZ DE delay differential equations; state dependent delays; discontinuity tree; restart method; derivative jump points; generalized smoothing; derivative correction methods; multiplicity effects ID RUNGE-KUTTA METHODS; NUMERICAL-SOLUTION; NEUTRAL TYPE; SYSTEMS; DISCONTINUITIES; SOLVER; CODE; DDES AB This manuscript presents many detailed studies of the numerical solution (by the restart method) of a general class of functional differential equations with state dependent lags; that is, where the delays depend upon the (unknown) solution. It emphasizes the sharpness of earlier published results, including those that relate the multiplicity of various shifted zeros of the lag function to the rates of convergence of methods for locating these zeros and to the rates of convergence of the global solution of the delay equation. The studies were selected to clarify the unusual aspects of numerical methods for delay equations, particularly those with state dependent lags. Although the results given here are mainly analytical in nature, they are ones that every numerical analyst and software designer interested in delay equations should master since they form the technological basis for modern software for state dependent delay differential equations. Indeed, almost all modern delay equation software, in one form or another, is based on these results. (c) 2005 IMACS. Published by Elsevier B.V. All rights reserved. C1 Radford Univ, Dept Math & Stat, Radford, VA 24142 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Arizona State Univ, Dept Math & Stat, Tempe, AZ 85287 USA. RP Thompson, S (reprint author), Radford Univ, Dept Math & Stat, Radford, VA 24142 USA. EM theorems@webtv.net; neves3@llnl.gov; thompson@radford.edu NR 42 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9274 J9 APPL NUMER MATH JI Appl. Numer. Math. PD MAR-APR PY 2006 VL 56 IS 3-4 BP 472 EP 487 DI 10.1016/j.apnum.2005.04.017 PG 16 WC Mathematics, Applied SC Mathematics GA 027OU UT WOS:000236425700017 ER PT J AU Stolz, CJ Feit, MD Pistor, TV AF Stolz, CJ Feit, MD Pistor, TV TI Laser intensification by spherical inclusions embedded with multilayer coatings SO APPLIED OPTICS LA English DT Article ID THERMOMECHANICAL MODEL; DAMAGE; MIRROR; GEOMETRIES; 1.06-MU-M AB The initiation of laser damage within optical coatings can be better understood by electric-field modeling of coating defects. The result of this modeling shows that light intensification as large as 24x can occur owing to these coating defects. Light intensification tends to increase with inclusion diameter. Defects irradiated over a range of incident angles from 0 to 60 deg tend to have a higher light intensification at a 45 deg incidence. Irradiation wavelength has a significant effect on light intensification within the defect and the multilayer. Finally, shallow, or in the case of 45 deg irradiation, deeply embedded inclusions tend to have the highest light intensification. (c) 2006 Optical Society of America C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Panoram Technol Inc, Berkeley, CA 94704 USA. RP Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. EM stolz1@llnl.gov RI Feit, Michael/A-4480-2009 NR 22 TC 57 Z9 63 U1 0 U2 5 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1559-128X EI 2155-3165 J9 APPL OPTICS JI Appl. Optics PD MAR 1 PY 2006 VL 45 IS 7 BP 1594 EP 1601 DI 10.1364/AO.45.001594 PG 8 WC Optics SC Optics GA 018NB UT WOS:000235770000046 PM 16539268 ER PT J AU Tommasini, R Bruch, R Fill, E Bjeoumikhov, A AF Tommasini, R Bruch, R Fill, E Bjeoumikhov, A TI Convergent-beam diffraction of ultra-short hard X-ray pulses focused by a capillary lens SO APPLIED PHYSICS B-LASERS AND OPTICS LA English DT Article ID CRYSTALLOGRAPHY; REFLECTION; RESOLUTION; RADIATION; DYNAMICS AB We report the generation of diffraction patterns using X-ray pulses from a fs-laser plasma focused by an X-ray capillary lens to a spot size smaller than 100 mu m. A thin moving iron tape is irradiated at 10 Hz with 200 mJ/130 fs titanium-sapphire laser pulses. Fe K-alpha (lambda=0.194 nm) radiation emitted from the rear side of the tape is focused to a spot by the capillary lens resulting in an intensity enhancement of about 1600. The ability of this system to effectively allow diffraction from samples of micron size is demonstrated by producing well-illuminated diffractograms from a Si(111) crystal with good signal to noise ratio obtained in only about 10 s. The different path lengths of propagation in the lens induce an angle-encoded delay of the converging X-ray pulse and thus provide the possibility of realizing a novel ultra-fast streak camera. C1 Max Planck Inst Quantum Opt, D-85748 Garching, Germany. Inst Geratebau GmbH, D-12489 Berlin, Germany. RP Tommasini, R (reprint author), Lawrence Livermore Natl Lab, POB 5508, Livermore, CA 94550 USA. EM tommasini2@llnl.gov RI Tommasini, Riccardo/A-8214-2009 OI Tommasini, Riccardo/0000-0002-1070-3565 NR 18 TC 3 Z9 3 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0946-2171 J9 APPL PHYS B-LASERS O JI Appl. Phys. B-Lasers Opt. PD MAR PY 2006 VL 82 IS 4 BP 519 EP 522 DI 10.1007/s00340-005-2105-x PG 4 WC Optics; Physics, Applied SC Optics; Physics GA 012VG UT WOS:000235368400003 ER PT J AU van Herpen, MMJW Ngai, AKY Bisson, SE Hackstein, JHP Woltering, EJ Harren, FJM AF van Herpen, MMJW Ngai, AKY Bisson, SE Hackstein, JHP Woltering, EJ Harren, FJM TI Optical parametric oscillator-based photoacoustic detection of CO2 at 4.23 mu m allows real-time monitoring of the respiration of small insects SO APPLIED PHYSICS B-LASERS AND OPTICS LA English DT Article ID POLED LITHIUM-NIOBATE; QUANTUM-CASCADE LASERS; TRACE GAS-DETECTION; CONTINUOUS-WAVE; HIGH-POWER; SPECTROSCOPY; OPERATION; LINBO3 AB A continuous wave, single frequency and continuously tunable optical parametric oscillator is used in combination with photoacoustic spectroscopy to detect trace emissions of CO2 from insects under atmospheric conditions. The optical parametric oscillator (OPO) contains a periodically poled lithium niobate crystal and is tunable over the 3.9 to 4.8 mu m infrared wavelength region. With the strong rotational-vibrational absorption band of CO2 at 4.23 mu m, it is possible to detect CO2 down to 7 parts per billion volume using 20 mW of the OPO beam. This detection sensitivity was achieved by adding 4% of SF6 gas to the atmospheric gas mixture to overcome the slow vibrational relaxation of the excited CO2 levels. The usefulness of this system is demonstrated by real-time measuring of the fluctuations of the CO2 concentration in the breath of a single ant (Lasius niger) and individual fruit flies (Drosophila melanogaster). C1 Univ Nijmegen, Life Sci Trace Gas Facil, NL-6500 GL Nijmegen, Netherlands. Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA. Radboud Univ, Dept Evolut Microbiol, NL-6500 GL Nijmegen, Netherlands. Univ Wageningen & Res Ctr, NL-6700 AA Wageningen, Netherlands. RP Harren, FJM (reprint author), Univ Nijmegen, Life Sci Trace Gas Facil, POB 9010, NL-6500 GL Nijmegen, Netherlands. EM f.harren@science.ru.nl RI Harren, Frans/A-1729-2010 NR 29 TC 23 Z9 23 U1 3 U2 8 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0946-2171 J9 APPL PHYS B-LASERS O JI Appl. Phys. B-Lasers Opt. PD MAR PY 2006 VL 82 IS 4 BP 665 EP 669 DI 10.1007/s00340-005-2119-4 PG 5 WC Optics; Physics, Applied SC Optics; Physics GA 012VG UT WOS:000235368400028 ER PT J AU Burr, TL Hemphill, GS AF Burr, TL Hemphill, GS TI Multiple-component radiation-measurement error models SO APPLIED RADIATION AND ISOTOPES LA English DT Article DE radiation-measurement error models; item-specific bias; analysis of variance ID 2-COMPONENT MODEL AB Measurement error modeling and assessment are crucial to any assay method. Realistic error models prioritize future efforts to reduce key error components and provide a way to estimate total ("random" and "systematic") measurement error. This paper describes multiple-component error models for radiation-based assay, gives example applications, and describes strategies for choosing and then fitting error models. (c) 2005 Elsevier Ltd. All rights reserved. C1 Los Alamos Natl Lab, Stat Sci Grp, Los Alamos, NM 87545 USA. RP Burr, TL (reprint author), Los Alamos Natl Lab, Stat Sci Grp, Mail Stop F600, Los Alamos, NM 87545 USA. EM tburr@lanl.gov NR 11 TC 7 Z9 7 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0969-8043 J9 APPL RADIAT ISOTOPES JI Appl. Radiat. Isot. PD MAR PY 2006 VL 64 IS 3 BP 379 EP 385 DI 10.1016/j.apradiso.2005.09.002 PG 7 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Chemistry; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 022KM UT WOS:000236054700014 PM 16297633 ER PT J AU Brown, MS Fiechtner, GJ Rudd, JV Zimdars, DA Warmuth, M Gord, JR AF Brown, MS Fiechtner, GJ Rudd, JV Zimdars, DA Warmuth, M Gord, JR TI Water-vapor detection using asynchronous THz sampling SO APPLIED SPECTROSCOPY LA English DT Article DE terahertz time-domain spectroscopy; THz-TDS; asynchronous optical sampling; ASOPS; water vapor ID TIME-DOMAIN SPECTROSCOPY; TERAHERTZ SPECTROSCOPY; COHERENT TRANSIENTS; PROBE SPECTROSCOPY; ATOMIC SODIUM; LOSS TANGENT; LIQUIDS; PUMP; RADIATION; DYNAMICS AB The use of a fiber-coupled terahertz (THz) transmitter/receiver pair for spectroscopic detection of water vapor is investigated. Transmission signals of all alumina cylinder demonstrate that the measurement approach call be applied in a windowless ceramic combustor. First, a conventional commercial transmitter/receiver pair is used to make measurements for frequencies to 1.25 THz. Water-vapor absorption is clearly evident within the alumina transparency window and is readily modeled using existing databases. A variety of data-acquisition schemes is possible using THz instrumentation. To assess signal-collection techniques, a prototype THz transmitter/receiver pair is then used with the asynchronous optical-sampling (ASOPS) technique to obtain asynchronous THz-sampling signals to 1 THz without the need for all optomechanical delay line. Two mode-locked Ti:sapphire lasers operating at slightly different repetition rates are used for pumping the transmitter and receiver independently to permit a complete time-domain THz signal to be recorded. The resulting repetitive phase walkout is demonstrated by collecting power spectra of room air that exhibit water-vapor absorption. C1 Innovat Sci Solut Inc, Dayton, OH 45440 USA. Sandia Natl Labs, Livermore, CA 94550 USA. Picometrix Inc, Ann Arbor, MI 48104 USA. USAF, Res Lab, Propuls Directorate, Wright Patterson AFB, OH 45433 USA. RP Brown, MS (reprint author), Innovat Sci Solut Inc, 2766 Indian Ripple Rd, Dayton, OH 45440 USA. EM rnichael.brown@wpafb.af.mil NR 43 TC 6 Z9 6 U1 1 U2 6 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 USA SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD MAR PY 2006 VL 60 IS 3 BP 261 EP 265 DI 10.1366/000370206776342670 PG 5 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA 028RK UT WOS:000236505800006 PM 16608568 ER PT J AU Williarns, BJ Huzurbazar, AV AF Williarns, BJ Huzurbazar, AV TI Posterior sampling with constructed likelihood functions: an application to flowgraph models SO APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY LA English DT Article; Proceedings Paper CT 7th World Meeting of the International-Society-for-Bayesian-Analysis CY MAY 23-27, 2004 CL Vina del Mar, CHILE SP Int Soc Bayesian Analy DE Bayesian predictive distribution; censored data; flowgraph model; incomplete data; slice sampling; queuing model ID HISTOGRAM AB We consider posterior sampling in situations where data are incomplete in such a way that likelihood functions corresponding to portions of the data must be constructed. Slice sampling, a recently developed Markov chain Monte Carlo method, makes such computation feasible. Such situations arise in the context of stochastic networks where an overall predictive waiting time is comprised of convolutions and finite mixtures of individual transitions and portions of the individual transition information is unobserved for some records. We present applications involving flowgraph models in the reliability setting; however, the methodology presented is relevant to any application where likelihood functions cannot be specified in closed form but can be evaluated nurnerically. Copyright (C) 2006 John Wiley & Sons, Ltd. C1 Univ New Mexico, Dept Math & Stat, Albuquerque, NM 87131 USA. Los Alamos Natl Lab, Stat Sci Grp, Los Alamos, NM 87545 USA. RP Huzurbazar, AV (reprint author), Univ New Mexico, Dept Math & Stat, Albuquerque, NM 87131 USA. EM brianw@lanl.gov; aparna@stat.unm.edu OI Williams, Brian/0000-0002-3465-4972 NR 15 TC 4 Z9 4 U1 0 U2 1 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 1524-1904 J9 APPL STOCH MODEL BUS JI Appl. Stoch. Models. Bus. Ind. PD MAR-APR PY 2006 VL 22 IS 2 BP 127 EP 137 DI 10.1002/asmb.623 PG 11 WC Operations Research & Management Science; Mathematics, Interdisciplinary Applications; Statistics & Probability SC Operations Research & Management Science; Mathematics GA 037NP UT WOS:000237154000004 ER PT J AU VanGeet, O Reilly, S AF VanGeet, O Reilly, S TI Ventilation heat recovery for laboratories SO ASHRAE JOURNAL LA English DT Article C1 Natl Renewable Energy Lab, Site Operat Grp, Golden, CO 80401 USA. Enermodal Engn, Denver, CO USA. RP VanGeet, O (reprint author), Natl Renewable Energy Lab, Site Operat Grp, Golden, CO 80401 USA. NR 3 TC 0 Z9 0 U1 0 U2 2 PU AMER SOC HEATING REFRIGERATING AIR-CONDITIONING ENG, INC, PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA SN 0001-2491 J9 ASHRAE J JI ASHRAE J. PD MAR PY 2006 VL 48 IS 3 BP 44 EP + PG 8 WC Thermodynamics; Construction & Building Technology; Engineering, Mechanical SC Thermodynamics; Construction & Building Technology; Engineering GA 022UR UT WOS:000236082100010 ER PT J AU Quartararo, L Roth, K AF Quartararo, L Roth, K TI Optimal whole building control systems SO ASHRAE JOURNAL LA English DT Article C1 TIAX, Elect Syst Unit, Cambridge, MA USA. TIAX, HVAC, Cambridge, MA USA. TIAX, Refrigerat Technol Sector, Cambridge, MA USA. US DOE, Bldg Technol Program, Washington, DC USA. RP Quartararo, L (reprint author), TIAX, Elect Syst Unit, Cambridge, MA USA. NR 12 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 J9 ASHRAE J JI ASHRAE J. PD MAR PY 2006 VL 48 IS 3 BP 66 EP 68 PG 3 WC Thermodynamics; Construction & Building Technology; Engineering, Mechanical SC Thermodynamics; Construction & Building Technology; Engineering GA 022UR UT WOS:000236082100013 ER PT J AU Fan, XH Strauss, MA Richards, GT Hennawi, JF Becker, RH White, RL Diamond-Stanic, AM Donley, JL Jiang, LH Kim, JS Vestergaard, M Young, JE Gunn, JE Lupton, RH Knapp, GR Schneider, DP Brandt, WN Bahcall, NA Barentine, JC Brinkmann, J Brewington, HJ Fukugita, M Harvanek, M Kleinman, SJ Krzesinski, J Long, D Neilsen, EH Nitta, A Snedden, SA Voges, W AF Fan, XH Strauss, MA Richards, GT Hennawi, JF Becker, RH White, RL Diamond-Stanic, AM Donley, JL Jiang, LH Kim, JS Vestergaard, M Young, JE Gunn, JE Lupton, RH Knapp, GR Schneider, DP Brandt, WN Bahcall, NA Barentine, JC Brinkmann, J Brewington, HJ Fukugita, M Harvanek, M Kleinman, SJ Krzesinski, J Long, D Neilsen, EH Nitta, A Snedden, SA Voges, W TI A survey of z > 5.7 quasars in the Sloan Digital Sky Survey. IV. Discovery of seven additional quasars SO ASTRONOMICAL JOURNAL LA English DT Article DE quasars : absorption lines; quasars : emission lines; quasars : general ID SURVEY COMMISSIONING DATA; HIGH-REDSHIFT QUASARS; BL-LACERTAE OBJECTS; 1ST DATA RELEASE; EMISSION; Z-SIMILAR-TO-6; SPECTRA; CATALOG; SYSTEM; SAMPLE AB We present the discovery of seven quasars at z > 5.7, selected from similar to 2000 deg(2) of multicolor imaging data of the Sloan Digital Sky Survey. The new quasars have redshifts z from 5.79 to 6.13. Five are selected as part of a complete flux-limited sample in the SDSS northern Galactic cap; two have larger photometric errors and are not part of the complete sample. One of the new quasars, SDSS J1335+3533 (z = 5.93), exhibits no emission lines; the 3 sigma limit on the rest-frame equivalent width of the Ly alpha+N v line is 5 angstrom. It is the highest redshift lineless quasar known and could be a gravitational lensed galaxy, a BL Lac object, or a new type of quasar. Two new z > 6 quasars, SDSS 1250+3130 (z = 6.13) and SDSS J1137+3549 (z = 6.01), show deep Gunn-Peterson absorption gaps in Ly alpha. These gaps are narrower than the complete Gunn-Peterson absorption troughs observed among quasars at z > 6.2 and do not have complete Ly alpha absorption. C1 Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Princeton Univ Observ, Princeton, NJ 08544 USA. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Lawrence Livermore Natl Lab, Inst Geophys & Planetary Sci, Livermore, CA 94550 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. Apache Point Observ, Sunspot, NM 88349 USA. Univ Tokyo, Inst Cosm Ray Res, Tanashi, Tokyo 1888502, Japan. Cracow Pedagog Univ, Mt Suhora Observ, PL-30084 Krakow, Poland. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Max Planck Inst Extraterr Phys, D-85750 Garching, Germany. RP Fan, XH (reprint author), Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. RI Vestergaard, Marianne/M-5247-2014; Brandt, William/N-2844-2015; Jiang, Linhua/H-5485-2016 OI Vestergaard, Marianne/0000-0001-9191-9837; Brandt, William/0000-0002-0167-2453; Jiang, Linhua/0000-0003-4176-6486 NR 53 TC 231 Z9 232 U1 1 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 2006 VL 131 IS 3 BP 1203 EP 1209 DI 10.1086/500296 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 023RK UT WOS:000236143700001 ER PT J AU Silvestri, NM Hawley, SL West, AA Szkody, P Bochanski, JJ Eisenstein, DJ McGehee, P Schmidt, GD Smith, JA Wolfe, MA Harris, HC Kleinman, SJ Liebert, J Nitta, A Barentine, JC Brewington, HJ Brinkmann, J Harvanek, M Krzesinski, J Long, D Neilsen, EH Schneider, DP Snedden, SA AF Silvestri, NM Hawley, SL West, AA Szkody, P Bochanski, JJ Eisenstein, DJ McGehee, P Schmidt, GD Smith, JA Wolfe, MA Harris, HC Kleinman, SJ Liebert, J Nitta, A Barentine, JC Brewington, HJ Brinkmann, J Harvanek, M Krzesinski, J Long, D Neilsen, EH Schneider, DP Snedden, SA TI A catalog of spectroscopically selected close binary systems from the sloan digital sky survey data release four SO ASTRONOMICAL JOURNAL LA English DT Article DE binaries : close; novae, cataclysmic variables; stars : activity; stars : low-mass; brown dwarfs; white dwarfs ID WHITE-DWARF STARS; 1ST DATA RELEASE; LOW-MASS; CATACLYSMIC VARIABLES; MAGNETIC ACTIVITY; COOL COMPANIONS; KINEMATICS; EMISSION; OBJECTS; SEARCH AB We present a spectroscopic sample of 747 detached close binary systems from the Sloan Digital Sky Survey ( SDSS) Fourth Data Release. The majority of these binaries consist of a white dwarf primary and a low- mass secondary ( typically M dwarf) companion. We have determined the temperature and gravity for 496 of the white dwarf primaries and the spectral type and magnetic activity properties for 661 of the low- mass secondaries. We have estimated the distances for each of the white dwarf - main- sequence star binaries and use white dwarf evolutionary grids to establish the age of each binary system from the white dwarf cooling times. With respect to a spectroscopically identified sample of similar to 8000 isolated M dwarf stars in the SDSS, the M dwarf secondaries show enhanced activity with a higher active fraction at a given spectral type. The white dwarf temperatures and gravities are similar to the distribution of similar to 1900 DA white dwarfs from the SDSS. The ages of the binaries in this study range from similar to 0.5Myr to nearly 3 Gyr ( average age similar to 0.20 Gyr). C1 Univ Washington, Dept Astron, Seattle, WA 98195 USA. Univ Arizona, Dept Astron, Tucson, AZ 85721 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Los Alamos Natl Lab, LANSCE 8, Los Alamos, NM 87545 USA. New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. US Naval Observ, Flagstaff, AZ 86002 USA. New Mexico State Univ, Apache Point Observ, Sunspot, NM 88349 USA. Cracow Pedagog Univ, Mt Suhoro Observ, PL-30084 Krakow, Poland. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. RP Silvestri, NM (reprint author), Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA. EM nms@astro.washington.edu; slh@astro.washington.edu; west@astro.washington.edu; szkody@astro.washington.edu; bochansk@astro.washington.edu; eisenste@cmb.as.arizona.edu; peregrin@apo.nmsu.edu; schmidt@as.arizona.edu; jasman@nis.lanl.gov; maw2323@u.washington.edu; hch@nofs.navy.mil; jurek@apo.nmsu.edu; jliebert@as.arizona.edu; neilsen@fnal.gov; dps@miffy2.astro.psu.edu RI West, Andrew/H-3717-2014 NR 59 TC 94 Z9 97 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 2006 VL 131 IS 3 BP 1674 EP 1686 DI 10.1086/499494 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 023RK UT WOS:000236143700036 ER PT J AU Agueros, MA Anderson, SF Margon, B Posselt, B Haberl, F Voges, W Annis, J Schneider, DP Brinkmann, J AF Agueros, MA Anderson, SF Margon, B Posselt, B Haberl, F Voges, W Annis, J Schneider, DP Brinkmann, J TI Candidate isolated neutron stars and other optically blank X-ray fields identified from the Rosat all-sky and sloan digital sky surveys SO ASTRONOMICAL JOURNAL LA English DT Article DE stars : neutron ID BRIGHT SOURCE CATALOG; MEDIUM-SENSITIVITY SURVEY; XMM-NEWTON; DATA RELEASE; IDENTIFICATIONS; ACCRETION; SELECTION; BINARIES; SPECTRA; CHANDRA AB Only seven radio-quiet isolated neutron stars (INSs) emitting thermal X-rays are known, a sample that has yet to definitively address such fundamental issues as the equation of state of degenerate neutron matter. We describe a selection algorithm based on a cross-correlation of the ROSAT All-Sky Survey (RASS) and the Sloan Digital Sky Survey (SDSS) that identifies X-ray error circles devoid of plausible optical counterparts to the SDSS g similar to 22 mag limit. We quantitatively characterize these error circles as optically blank; they may host INSs or other similarly exotic X-ray sources such as radio-quiet BL Lac objects and obscured active galactic nuclei. Our search is an order of magnitude more selective than previous searches for optically blank RASS error circles and excludes the 99.9% of error circles that containmore common X-ray-emitting subclasses. We find 11 candidates, 9 of which are new. While our search is designed to find the best INS candidates and not to produce a complete list of INSs in the RASS, it is reassuring that our number of candidates is consistent with predictions from INS population models. Further X-ray observations will obtain pinpoint positions and determine whether these sources are entirely optically blank at g similar to 22, supporting the presence of likely INSs and perhaps enabling detailed follow-up studies of neutron star physics. C1 Univ Washington, Dept Astron, Seattle, WA 98195 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Max Planck Inst Extraterr Phys, D-85741 Garching, Germany. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. Apache Point Observ, Sunspot, NM 88349 USA. RP Agueros, MA (reprint author), Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA. EM agueros@astro.washington.edu RI Margon, Bruce/B-5913-2012; Agueros, Marcel/K-7998-2014; OI Agueros, Marcel/0000-0001-7077-3664; Posselt, Bettina/0000-0003-2317-9747 NR 44 TC 22 Z9 22 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 2006 VL 131 IS 3 BP 1740 EP 1749 DI 10.1086/500049 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 023RK UT WOS:000236143700044 ER PT J AU Domingo-Santamaria, E Torres, DF AF Domingo-Santamaria, E Torres, DF TI Hadronic processes within collective stellar winds SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE gamma rays : theory; gamma rays : observations; stars : winds, outflows ID GAMMA-RAY SOURCES; INITIAL MASS FUNCTION; COSMIC-RAYS; SOLAR-WIND; PARTICLE-ACCELERATION; MILKY-WAY; ELECTROMAGNETIC-RADIATION; CLUSTER WESTERLUND-1; TERMINAL VELOCITIES; SUPERNOVA-REMNANTS AB We have proposed that the interaction between relativistic protons resulting from Fermi first order acceleration in the superbubble of a stellar OB association or in other nearby accelerators and ions residing in single stellar winds of massive stars could lead to TeV sources without strong counterparts at lower energies. Here we refine this analysis in several directions. We study collective wind configurations produced by a number of massive stars, and obtain densities and expansion velocities of the stellar wind gas that is to be target of hadronic interactions. We study the expected gamma-ray emission from these regions, considering in an approximate way the effect of cosmic ray modulation. We compute secondary particle production (electrons from knock-on interactions and electrons and positrons from charged pion decay), and solve the loss equation with ionization, synchrotron, bremsstrahlung, inverse Compton and expansion losses. We provide examples where configurations can produce sources for GLAST satellite and the MAGIC/HESS/VERITAS telescopes in non-uniform ways, i.e., with or without the corresponding counterparts. We show that in all cases we studied, no EGRET source is expected. We comment on HESS J1303-631 and on Cygnus OB 2 and Westerlund 1 as two associations where this scenario could be tested. C1 Inst Fis Altes Energies, Bellaterra 08193, Spain. Inst Ciencies Espai, Fac Ciencies, Bellaterra 08193, Spain. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Domingo-Santamaria, E (reprint author), Inst Fis Altes Energies, Edifici C-N,Campus UAB, Bellaterra 08193, Spain. EM dtorres@ieec.uab.es RI Torres, Diego/O-9422-2016 OI Torres, Diego/0000-0002-1522-9065 NR 62 TC 25 Z9 25 U1 0 U2 0 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 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 2006 VL 448 IS 2 BP 613 EP 622 DI 10.1051/0004-6361:20054027 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 018PQ UT WOS:000235777700028 ER PT J AU Abbasi, RU Abu-Zayyad, T Amann, JF Archbold, G Atkins, R Belov, K Belz, JW BenZvi, S Bergman, DR Boyer, JH Cannon, CT Cao, Z Connolly, BM Fedorova, Y Finley, CB Hanlon, WF Hoffman, CM Holzscheiter, MH Hughes, GA Huntemeyer, P Jui, CCH Kirn, MA Knapp, BC Loh, EC Manago, N Mannel, EJ Martens, K Matthews, JAJ Matthews, JN O'Neill, A Reil, K Roberts, MD Schnetzer, SR Seman, M Sinnis, G Smith, JD Sokolsky, P Song, C Springer, RW Stokes, BT Thomas, SB Thomson, GB Tupa, D Westerhoff, S Wiencke, LR Zech, A AF Abbasi, RU Abu-Zayyad, T Amann, JF Archbold, G Atkins, R Belov, K Belz, JW BenZvi, S Bergman, DR Boyer, JH Cannon, CT Cao, Z Connolly, BM Fedorova, Y Finley, CB Hanlon, WF Hoffman, CM Holzscheiter, MH Hughes, GA Huntemeyer, P Jui, CCH Kirn, MA Knapp, BC Loh, EC Manago, N Mannel, EJ Martens, K Matthews, JAJ Matthews, JN O'Neill, A Reil, K Roberts, MD Schnetzer, SR Seman, M Sinnis, G Smith, JD Sokolsky, P Song, C Springer, RW Stokes, BT Thomas, SB Thomson, GB Tupa, D Westerhoff, S Wiencke, LR Zech, A CA High Resolution Fly's Eye Collabor TI A measurement of time-averaged aerosol optical depth using air-showers observed in stereo by HiRes SO ASTROPARTICLE PHYSICS LA English DT Article DE HiRes; extensive air-showers; atmosphere; aerosols; aerosol optical depth ID FLYS EYE AB Air fluorescence measurements of cosmic ray energy must be corrected for attenuation of the atmosphere. In this paper, we show that the air-showers themselves can yield a measurement of the aerosol attenuation in terms of optical depth, time-averaged over extended periods. Although the technique lacks statistical power to make the critical hourly measurements that only specialized active instruments can achieve, we note the technique does not depend on absolute calibration of the detector hardware, and requires no additional equipment beyond the fluorescence detectors that observe the air showers. This paper describes the technique, and presents results based oil analysis of 1258 air-showers observed in stereo by the High Resolution Fly's Eye over a four year span. (c) 2006 Elsevier B.V. All rights reserved. C1 Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA. High Energy Astrophys Inst, Salt Lake City, UT 84112 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Montana, Dept Phys & Astron, Missoula, MT 59812 USA. Columbia Univ, Nevis Labs, Irvington, NY 10533 USA. Columbia Univ, Dept Phys, New York, NY 10027 USA. Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA. Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan. Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA. RP Wiencke, LR (reprint author), Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA. EM wiencke@cosmic.utah.edu RI Song, Chihwa/A-3455-2008; Martens, Kai/A-4323-2011; Belov, Konstantin/D-2520-2013; OI Tupa, Dale/0000-0002-6265-5016 NR 7 TC 9 Z9 9 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-6505 J9 ASTROPART PHYS JI Astropart Phys. PD MAR PY 2006 VL 25 IS 2 BP 93 EP 97 DI 10.1016/j.astropartphys.2006.01.001 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 023IR UT WOS:000236120800001 ER PT J AU Belz, JW Burt, GW Cao, Z Chang, FY Chen, CC Chen, CW Chen, P Field, C Findlay, J Huntemeyer, P Huang, MA Hwang, WYP Iverson, R Jones, BF Jui, CCH Kirn, M Lin, GL Loh, EC Maestas, MM Manago, N Martens, K Matthews, JN Ng, JST Odian, A Reil, K Smith, JD Snow, R Sokolsky, P Springer, RW Thomas, JR Thomas, SB Thomson, GB Walz, D Zech, A AF Belz, JW Burt, GW Cao, Z Chang, FY Chen, CC Chen, CW Chen, P Field, C Findlay, J Huntemeyer, P Huang, MA Hwang, WYP Iverson, R Jones, BF Jui, CCH Kirn, M Lin, GL Loh, EC Maestas, MM Manago, N Martens, K Matthews, JN Ng, JST Odian, A Reil, K Smith, JD Snow, R Sokolsky, P Springer, RW Thomas, JR Thomas, SB Thomson, GB Walz, D Zech, A CA FLASH Collaboration TI Measurement of pressure dependent fluorescence yield of air: Calibration factor for UHECR detectors SO ASTROPARTICLE PHYSICS LA English DT Article DE nitrogen fluorescence; air fluorescence; extensive air shower; ultrahigh-energy cosmic rays ID LIFETIME MEASUREMENTS; PHOTON YIELDS; COSMIC-RAYS; SPECTRUM; ELECTRONS; GAS AB In a test experiment at the Final Focus Test Beam of the Stanford Linear Accelerator Center, the fluorescence yield of 28.5 GeV electrons in air and nitrogen was measured. The measured photon yields between 300 and 400 nm at 1 atm and 29 degrees C are Y(760 Torr)(air) = 4.42 +/- 0.73 and Y(760 Torr)N-2 = 29.2 +/- 4.8 photons per electron per meter. Assuming that the fluorescence yield is proportional to the energy deposition of a charged particle traveling through air, good agreement with measurements at lower particle energies is observed. Published by Elsevier B.V. C1 Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA. Univ Utah, High Energy Astrophys Inst, Salt Lake City, UT 84112 USA. Natl Taiwan Univ, Dept Phys, Ctr Cosmol & Particle Astrophys, Taipei 10617, Taiwan. Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA. RP Huntemeyer, P (reprint author), Univ Utah, Dept Phys, 115 South 1400 East,Rm 201 James Fletcher Bldg, Salt Lake City, UT 84112 USA. EM petra@cosmic.utah.edu RI Martens, Kai/A-4323-2011; OI HWANG, W-Y/0000-0003-1563-8683 NR 29 TC 28 Z9 28 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-6505 J9 ASTROPART PHYS JI Astropart Phys. PD MAR PY 2006 VL 25 IS 2 BP 129 EP 139 DI 10.1016/j.astropartphys.2005.12.008 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 023IR UT WOS:000236120800005 ER PT J AU Linder, EV AF Linder, EV TI On oscillating dark energy SO ASTROPARTICLE PHYSICS LA English DT Article DE dark energy; cosmology; supernovae; large scale structure AB Distance-redshift data can impose strong constraints on dark energy models even when the equation of state is oscillatory. Despite the double integral dependence of the distance on the equation of state, precision measurement of the distance-redshift relation for z = 0-2 is more incisive than the linear growth factor, CMB last scattering surface distance, and the age of the universe in distinguishing oscillatory behavior from an average behavior. While oscillating models might help solve the coincidence problem (since acceleration occurs periodically), next generation observations will strongly constrain such possibilities. Published by Elsevier B.V. C1 Univ Calif Berkeley, Berkeley Lab, Berkeley, CA 94720 USA. RP Linder, EV (reprint author), Univ Calif Berkeley, Berkeley Lab, Berkeley, CA 94720 USA. EM evlinder@lbl.gov NR 14 TC 33 Z9 33 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-6505 J9 ASTROPART PHYS JI Astropart Phys. PD MAR PY 2006 VL 25 IS 2 BP 167 EP 171 DI 10.1016/j.astropartphys.2005.12.003 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 023IR UT WOS:000236120800008 ER PT J AU Koushiappas, SM Zentner, AR AF Koushiappas, SM Zentner, AR TI Testing models of supermassive black hole seed formation through gravity waves SO ASTROPHYSICAL JOURNAL LA English DT Review DE black hole physics; cosmology : theory; dark matter; galaxies : halos; gravitational waves; quasars : general ID FREQUENCY GRAVITATIONAL-WAVES; PROBE WMAP OBSERVATIONS; ACTIVE GALACTIC NUCLEI; GALAXY FORMATION; ANGULAR-MOMENTUM; 1ST STARS; SIGMA RELATION; HIERARCHICAL-MODELS; LUMINOSITY FUNCTION; POWER SPECTRUM AB We study the gravitational wave background produced from the formation and assembly of supermassive black holes within the cosmological paradigm of hierarchical structure formation. In particular, we focus on a supermassive black hole formation scenario in which the present-day population of supermassive black holes is built from high-mass seed black holes, and we compute the concomitant spectrum of gravitational radiation produced by mergers of the seed black holes. We find that this scenario predicts a large gravitational wave background that should be resolved into individual sources with space interferometers, such as the proposed Laser Interferometric Space Antenna (LISA). The number of inspiral, merger, and ringdown events above a signal-to-noise ratio of 5 that results from massive black hole seeds is on the order of 10(3). This prediction is robust and insensitive to several of the details of the model. We conclude that an interferometer such as LISA will be able to effectively rule out or confirm a class of models in which supermassive black holes grow from high-mass seed black holes and may be able to place strong limits on the role of mergers as a channel for supermassive black hole growth. Supermassive black hole seeds likely form in the earliest protogalactic structures at high redshift, and the masses of supermassive black holes are known to be strongly correlate dwith the potentials of the spheroids in which they reside. Therefore, these results imply that space interferometers can be used as a powerful probe of the physics of galaxy formation and protogalaxy formation at very high redshift. C1 ETH, Dept Phys, CH-8093 Zurich, Switzerland. Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA. Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA. RP Los Alamos Natl Lab, Div Theoret T6, Los Alamos, NM 87545 USA. EM smkoush@lanl.gov; zentner@kicp.uchicago.edu NR 114 TC 34 Z9 35 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 MAR 1 PY 2006 VL 639 IS 1 BP 7 EP 22 DI 10.1086/499325 PN 1 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 019LI UT WOS:000235836900002 ER PT J AU Mei, S Blakeslee, JP Stanford, SA Holden, BP Rosati, P Strazzullo, V Homeier, N Postman, M Franx, M Rettura, A Ford, H Illingworth, GD Ettori, S Bouwens, RJ Demarco, R Martel, AR Clampin, M Hartig, GF Eisenhardt, P Ardila, DR Bartko, F Benitez, N Bradley, LD Broadhurst, TJ Brown, RA Burrows, CJ Cheng, ES Cross, NJG Feldman, PD Golimowski, DA Goto, T Gronwall, C Infante, L Kimble, RA Krist, JE Lesser, MP Menanteau, F Meurer, GR Miley, GK Motta, V Sirianni, M Sparks, WB Tran, HD Tsvetanov, ZI White, RL Zheng, W AF Mei, S Blakeslee, JP Stanford, SA Holden, BP Rosati, P Strazzullo, V Homeier, N Postman, M Franx, M Rettura, A Ford, H Illingworth, GD Ettori, S Bouwens, RJ Demarco, R Martel, AR Clampin, M Hartig, GF Eisenhardt, P Ardila, DR Bartko, F Benitez, N Bradley, LD Broadhurst, TJ Brown, RA Burrows, CJ Cheng, ES Cross, NJG Feldman, PD Golimowski, DA Goto, T Gronwall, C Infante, L Kimble, RA Krist, JE Lesser, MP Menanteau, F Meurer, GR Miley, GK Motta, V Sirianni, M Sparks, WB Tran, HD Tsvetanov, ZI White, RL Zheng, W TI Evolution of the color-magnitude relation in high-redshift clusters: Blue early-type galaxies and red pairs in RDCS J0910+5422 SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : clusters : individual (RDCS J0910+5422); galaxies : elliptical and lenticular, cD; galaxies : evolution ID HUBBLE DEEP FIELD; ELLIPTIC GALAXIES; ADVANCED CAMERA; MS 1054-03; QUANTITATIVE MORPHOLOGY; DISTANT CLUSTERS; S0 GALAXIES; CL 1358+62; CALIBRATION; PHOTOMETRY AB The color-magnitude relation has been determined for the RDCS J0910+5422 cluster of galaxies at redshift z = 1.106. Cluster members were selected from the Hubble Space Telescope Advanced Camera for Surveys (HST ACS) images, combined with ground-based near-IR imaging and optical spectroscopy. The observed early-type color-magnitude relation (CMR) in i(775) - z(850) versus z(850) shows an intrinsic scatter in color of 0.060 +/- 0.009 mag, within 10 from the cluster X-ray emission center. Both the elliptical and the S0 galaxies show small scatter about the CMR of 0.042 +/- 0.010 and 0.044 +/- 0.020 mag, respectively. From the scatter about the CMR, a mean luminosity weighted age t > 3: 3 Gyr (z(f) approximate to 3) is derived for the elliptical galaxies, assuming a simple stellar population modeling (single-burst solar metallicity). Strikingly, the S0 galaxies in RDCS J0910+5422 are systematically bluer in i(775) - z(850), by 0.07 +/- 0.02 mag, than the ellipticals. The ellipticity distribution as a function of color indicates that the face-on S0s in this particular cluster have likely been classified as elliptical. Thus, if anything, the offset in color between the elliptical and S0 populations may be even more significant. The color offset between S0 and E galaxies corresponds to an age difference of approximate to 1 Gyr for a single-burst solar-metallicity model. A solar-metallicity model with an exponential decay in star formation will reproduce the offset for an age of 3.5 Gyr; i.e., the S0s have evolved gradually from star-forming progenitors. The early-type population in this cluster appears to be still forming. The blue early-type disk galaxies in RDCS J0910+5422 likely represent the direct progenitors of the more evolved S0s that follow the same red sequence as elliptical galaxies in other clusters. Thirteen red galaxy pairs are observed, and the galaxies associated in pairs constitute similar to 40% of the CMR galaxies in this cluster. C1 Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Univ Calif Davis, Dept Phys, Davis, CA 94516 USA. Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA. Univ Calif Santa Cruz, Lick Observ, Santa Cruz, CA 95064 USA. European So Observ, D-85748 Garching, Germany. Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Leiden Observ, NL-2300 RA Leiden, Netherlands. Univ Paris Sud 11, F-91405 Orsay, France. INAF, Osservat Astron, I-40127 Bologna, Italy. CALTECH, Jet Propuls Lab, Pasadena, CA 91125 USA. Bartko Sci & Technol, Brighton, CO 80602 USA. CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain. Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. LLC, Conceptual Anal, Glenn Dale, MD 20769 USA. Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. WM Keck Observ, Kamuela, HI 96743 USA. RP Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. EM smei@pha.jhu.edu RI White, Richard/A-8143-2012; Clampin, mark/D-2738-2012; Kimble, Randy/D-5317-2012; Ettori, Stefano/N-5004-2015; OI Ettori, Stefano/0000-0003-4117-8617; Benitez, Narciso/0000-0002-0403-7455; Blakeslee, John/0000-0002-5213-3548 NR 69 TC 60 Z9 60 U1 0 U2 5 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 MAR 1 PY 2006 VL 639 IS 1 BP 81 EP 94 DI 10.1086/499259 PN 1 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 019LI UT WOS:000235836900007 ER PT J AU Jaikumar, P Ouyed, R AF Jaikumar, P Ouyed, R TI Skyrmion stars: Astrophysical motivations and implications SO ASTROPHYSICAL JOURNAL LA English DT Article DE dense matter; elementary particles; neutrinos ID ROTATING RELATIVISTIC STARS; NEUTRON-STARS; NUCLEAR-MATTER; BLACK-HOLE; MASS; EQUATION; STATE; MODEL; PULSARS; BARYONS AB We study mass-radius relations for compact stars employing an equation of state (EOS) of dense matter based on a Skyrme fluid. The zero-temperature mean-field model is based on mesonic excitations, incorporates the scale breaking of QCD, and accommodates baryons (nucleons) that arise as a solitonic configuration of mesonic fields. Stable configurations are obtained for central densities rho(c)/rho(n) <= 5.0, where rho(n) 2.575 x 10(14) g cm(-3) is the nuclear saturation density. These "skyrmion stars'' are mostly fluid, with a crust that we describe by the EOS of Baym, Pethick, & Sutherland. Their masses and radii are in the ranges 0.4 <= M/M-circle dot <= 3.6 and 13 km <= R <= 23 km, respectively. The minimum spin period is computed to be in the range 0.7 ms <= P <= 2.1 ms. They appear to have a mass-radius curve quite different from either neutron or quark stars and provide a suitable description of the heavier mass neutron stars discovered recently due to the inherently stiff EOS. Within the same model, we compute the dominant neutrino emissivity in neutron-rich beta-equilibrated matter and determine the cooling behavior of skyrmion stars. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada. RP Argonne Natl Lab, Div Phys, 9700 S Cass Ave, Argonne, IL 60439 USA. EM jaikumar@phy.anl.gov; ouyed@phas.ucalgary.ca NR 65 TC 8 Z9 8 U1 0 U2 5 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 MAR 1 PY 2006 VL 639 IS 1 BP 354 EP 362 DI 10.1086/499267 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 019LI UT WOS:000235836900031 ER PT J AU McGowan, KE Zane, S Cropper, M Vestrand, WT Ho, C AF McGowan, KE Zane, S Cropper, M Vestrand, WT Ho, C TI Evidence for surface cooling emission in the XMM-Newton spectrum of the x-ray pulsar PSR B2334+61 SO ASTROPHYSICAL JOURNAL LA English DT Article DE pulsars : individual (PSR B2334+61); stars : neutron; X-rays : stars ID NEUTRON-STARS; SUPERNOVA REMNANT; RADIO PULSARS; RADIATION; PSR-B1706-44; SEARCH; FIELD; MODEL AB We report on the first XMM-Newton observation of the Vela-like pulsar PSR B2334+61. Spectral analysis reveals soft X-ray emission, with the bulk of the photons emitted at energies below similar to 1.5 keV. We find that the spectrum has a thermal origin and is well-fitted with either a blackbody or a magnetized, pure H atmospheric model. In the latter case, for a neutron star with a radius of 13 km and a magnetic field of 10(13) G, the best fit gives a hydrogen column density N-H 0.33 x 10(22) cm(-2) and an effective temperature T-eff(infinity) 0.65 x 10(6) K, as measured at Earth. A comparison of the surface temperature of PSR B2334+61 obtained from this fit with cooling curves favors a medium-mass neutron star with M similar to 1.45 M-circle dot or M similar to 1.6 M-circle dot, depending on which of two different models of proton superfluidity in the interior is used. We do not detect any pulsed emission from the source and determine an upper limit of 5% for the modulation amplitude of the emission on the pulsar's radio frequency. C1 UCL, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP UCL, Mullard Space Sci Lab, Holmbury St Mary, Dorking RH5 6NT, Surrey, England. EM km2@mssl.ucl.ac.uk RI Cropper, Mark/C-1574-2008 NR 43 TC 12 Z9 12 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 MAR 1 PY 2006 VL 639 IS 1 BP 377 EP 381 DI 10.1086/497327 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 019LI UT WOS:000235836900033 ER PT J AU Dearborn, DSP Lattanzio, JC Eggleton, PP AF Dearborn, DSP Lattanzio, JC Eggleton, PP TI Three-dimensional numerical experimentation on the core helium flash of low-mass red giants SO ASTROPHYSICAL JOURNAL LA English DT Article DE stars : evolution; stars : interiors ID NEUTRINO ENERGY-LOSS; STELLAR INTERIORS; OPACITIES; ELECTRONS; EVOLUTION; PLASMA; MATTER; STARS AB We model the core helium flash in a low-mass red giant using Djehuty, a fully three-dimensional (3D) code. The 3D structures were generated from converged models obtained during the one-dimensional (1D) evolutionary calculation of a 1 M-circle dot star. Independently of which starting point we adopted, we found that after some transient relaxation the 3D model settled down with a briskly convecting He-burning shell that was not very different from what the 1D model predicted. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Monash Univ, Dept Math, Melbourne, Vic 3168, Australia. RP Dearborn, DSP (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94551 USA. EM dearborn2@llnl.gov; john.lattanzio@sci.monash.edu.au; ppe@igpp.ucllnl.org NR 22 TC 59 Z9 59 U1 0 U2 5 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 1 PY 2006 VL 639 IS 1 BP 405 EP 415 DI 10.1086/499263 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 019LI UT WOS:000235836900036 ER PT J AU McDonald, P Seljak, U Burles, S Schlegel, DJ Weinberg, DH Cen, RY Shih, D Schaye, J Schneider, DP Bahcall, NA Briggs, JW Brinkmann, J Brunner, RJ Fukugita, M Gunn, JE Ivezic, Z Kent, S Lupton, RH Berk, DEV AF McDonald, P Seljak, U Burles, S Schlegel, DJ Weinberg, DH Cen, RY Shih, D Schaye, J Schneider, DP Bahcall, NA Briggs, JW Brinkmann, J Brunner, RJ Fukugita, M Gunn, JE Ivezic, Z Kent, S Lupton, RH Berk, DEV TI The Ly alpha forest power spectrum from the Sloan Digital Sky Survey SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE cosmology : observations; intergalactic medium; large-scale structure of universe methods : data analysis; quasars : absorption lines ID INTERGALACTIC MEDIUM; DATA RELEASE; COSMOLOGY; EVOLUTION; SYSTEM; SAMPLE; MODEL; FLUX AB We measure the power spectrum, P-F(k, z), of the transmitted flux in the Ly alpha forest using 3035 high-redshift quasar spectra from the Sloan Digital Sky Survey. This sample is almost 2 orders of magnitude larger than any previously available data set, yielding statistical errors of similar to 0.6% and similar to 0.005 on, respectively, the overall amplitude and logarithmic slope of PF( k; z). This unprecedented statistical power requires a correspondingly careful analysis of the data and of possible systematic contaminations in it. For this purpose we reanalyze the raw spectra to make use of information not preserved by the standard pipeline. We investigate the details of the noise in the data, resolution of the spectrograph, sky subtraction, quasar continuum, and metal absorption. We find that background sources such as metals contribute significantly to the total power and have to be subtracted properly. We also find clear evidence for Si III correlations with the Ly alpha forest and suggest a simple model to account for this contribution to the power. Our tests indicate that any residual systematics in the analysis are unlikely to affect the inference of cosmological parameters from P-F(k, z). These results should provide an essential ingredient for all future attempts to constrain modeling of structure formation, cosmological parameters, and theories for the origin of primordial fluctuations. C1 Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada. Princeton Univ, Dept Phys, Princeton, NJ 08544 USA. MIT, Dept Phys, Cambridge, MA 02139 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Ohio State Univ, Dept Astron, Columbus, OH 43210 USA. Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. Natl Solar Observ, Sunspot, NM 88349 USA. Apacha Point Observ, Sunspot, NM 88349 USA. Univ Illinois, NCSA, Urbana, IL 61801 USA. Univ Illinois, Dept Astron, Urbana, IL 61801 USA. Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan. Univ Washington, Dept Astron, Seattle, WA 98195 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP McDonald, P (reprint author), Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada. EM pmcdonal@cita.utoronto.ca OI McDonald, Patrick/0000-0001-8346-8394 NR 40 TC 209 Z9 209 U1 0 U2 5 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD MAR PY 2006 VL 163 IS 1 BP 80 EP 109 DI 10.1086/444361 PG 30 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 026RO UT WOS:000236360000003 ER PT J AU Raman, S Ertugrul, M Nestor, CW Trzhaskovskaya, MB AF Raman, S Ertugrul, M Nestor, CW Trzhaskovskaya, MB TI Ratios of internal conversion coefficients SO ATOMIC DATA AND NUCLEAR DATA TABLES LA English DT Review ID ELECTRON-CAPTURE DECAY; PURE E2 TRANSITIONS; L-SUBSHELL RATIOS; LINE INTENSITY RATIOS; LOW-ENERGY TRANSITIONS; KEV E3 TRANSITION; EXCITED-STATES; LEVEL STRUCTURE; ANOMALOUS CONVERSION; ISOMERIC TRANSITION AB We present here a database of available experimental ratios of internal conversion coefficients for different atomic subshells measured with an accuracy of 10% or better for a number of elements in the range 26 <= Z <= 100. The experimental set involves 414 ratios for pure and 1096 ratios for rnixed-multipolarity nuclear transitions in the transition energy range from 2 to 2300 keV. We give relevant theoretical ratios calculated in the framework of the Dirac-Fock method with and without regard for the hole in the atomic subshell after conversion. For comparison, the ratios obtained within the relativistic Hartree-Fock-Slater approximation are also presented. In cases where several ratios were measured for the same transition in a given isotope in which two multipolarities were involved, we present the mixing ratio 62 obtained by a least squares fit. (c) 2005 Elsevier Inc. All rights reserved. C1 Univ Tennessee, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Ataturk Univ, Div Phys, TR-25240 Erzurum, Turkey. Petersburg Nucl Phys Inst, RU-188300 Gatchina, Russia. RP Univ Tennessee, Knoxville, TN 37996 USA. EM CNestorjr@aol.com NR 330 TC 8 Z9 8 U1 1 U2 5 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0092-640X EI 1090-2090 J9 ATOM DATA NUCL DATA JI Atom. Data Nucl. Data Tables PD MAR PY 2006 VL 92 IS 2 BP 207 EP 243 DI 10.1016/j.adt.2005.12.001 PG 37 WC Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Physics GA 018GB UT WOS:000235751100002 ER PT J AU Semin, BK Seibert, M AF Semin, BK Seibert, M TI A carboxylic residue at the high-affinity, Mn-binding site participates in the binding of iron cations that block the site SO BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS LA English DT Article DE photosystem II; PSII; high-affinity site; manganese; iron; D1 Asp-170; citrate; chemical modification; carboxylic amino acid; low pH; metal ion oxidation; Y-z; metal ion binding; low affinity site ID OXYGEN-EVOLVING COMPLEX; PHOTOSYSTEM-II PREPARATIONS; D1 POLYPEPTIDE; ELECTRON DONATION; MANGANESE CLUSTER; WATER-OXIDATION; MEMBRANE-FRAGMENTS; CRYSTAL-STRUCTURE; DIFFERENCE SPECTROSCOPY; ANGSTROM RESOLUTION AB The role of carboxylic residues at the high-affinity, Mn-binding site in the ligation of iron cations blocking the site [Biochemistry 41 (2000) 5854] was studied, using a method developed to extract the iron cations blocking the site. We found that specifically bound Fe(Ill) cations can be extracted with citrate buffer at pH 3.0. Furthermore, citrate can also prevent the photooxidation of Fe(II) cations by Y-Z(center dot). Participation of a COOH group(s) in the ligation of Fe(111) at the high-affinity site was investigated using 1-ethyl-3-[(3-dimethylamino)propyl]carbodiimide (EDC), a chemical modifier of carboxylic amino acid residues. Modification of the COOH groups inhibits the light-induced oxidation of exogenous Mn(II) cations by Mn-depleted photosystem II (PSII[-Mn]) membranes. The rate of Mn(II) oxidation saturates at >= 10 mu M in PSII(-Mn) membranes and >= 500 mu M in EDC-treated PSII (-Mn) samples. Intact PSII(-Mn) membranes have only one site for Mn(II) oxidation via Y-Z (dissociation constant, K-d = 0.64 mu M), while EDC-treated PSII(-Mn) samples have two sites (K-d = 1.52 and 22 mu M; the latter is the low-affinity site). When PSII(-Mn) membranes were incubated with Fe(II) before modifier treatment (to block the high-affinity site) and the blocking iron cations were extracted with citrate (pH 3.0) after modification, the membranes contained only one site (K-d = 2.3 mu M) for exogenous Mn(II) oxidation by Y-Z(center dot) radical. In this case, the rate of electron donation via Y-Z saturated at a Mn(II) concentration >= 15 mu M. These results indicate that the carboxylic residue participating in Mn(II) coordination and the binding of oxidized manganese cations at the HA(Z) site is protected from the action of the modifier by the iron cations blocking the HA(Z) site. We concluded that the carboxylic residue (D1 Asp-170) participating in the coordination of the manganese cation at the HA(Z) site (Mn4 in the tetranuclear manganese cluster [Science 303 (2004) 1831]) is also involved in the ligation of the Fe cation(s) blocking the high-affinity Mn-binding site. (c) 2006 Elsevier B.V. All rights reserved. C1 Natl Renewable Energy Lab, Bas Sci Ctr, Golden, CO 80401 USA. Moscow MV Lomonosov State Univ, Fac Biol, Dept Biophys, Moscow 119992, Russia. RP Seibert, M (reprint author), Natl Renewable Energy Lab, Bas Sci Ctr, Golden, CO 80401 USA. EM mike_seibert@nrel.gov NR 56 TC 6 Z9 6 U1 2 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0005-2728 J9 BBA-BIOENERGETICS JI Biochim. Biophys. Acta-Bioenerg. PD MAR PY 2006 VL 1757 IS 3 BP 189 EP 197 DI 10.1016/j.bbabio.2006.02.001 PG 9 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 040UL UT WOS:000237406000008 PM 16564021 ER PT J AU Kraineva, J Nicolini, C Thiyagarajan, P Kondrashkina, E Winter, R AF Kraineva, J Nicolini, C Thiyagarajan, P Kondrashkina, E Winter, R TI Incorporation of alpha-chymotrypsin into the 3D channels of bicontinuous cubic lipid mesophases SO BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS LA English DT Article; Proceedings Paper CT Conference on Trends in High Pressure Protein Sciences CY SEP 01-03, 2005 CL Montpellier, FRANCE SP COST D30 DE high pressure; SAXD; FT-IR; lipid; cubic phase; monoolein; alpha-chymotrypsin; cytochrome c ID X-RAY-DIFFRACTION; DRUG-DELIVERY SYSTEMS; HIGH-PRESSURE; AMPHIPHILIC SYSTEMS; CYTOCHROME-C; PROTEIN; PHASES; SPECTROSCOPY; WATER; TEMPERATURE AB The effects of protein entrapment on the structure and phase behavior of periodically curved lipid mesostructures have been examined by synchrotron small-angle X-ray diffraction and FT-IR spectroscopy. The study was directed towards a better understanding of the effect of confinement in a lipid environment on the stability and unfolding behavior of alpha-chymotrypsin, and, vice versa, the effect of the entrapped protein on the lipid's mesophase structure and temperature- and pressure-dependent phase behavior. We compare the interaction of protein molecules of two different sizes (cytochrome c, 12.4 kDa, and alpha-chymotrypsin, 25.8 kDa) with the cubic Ia3d phase of monoolein (MO), which forms spontaneously in water. The cubic structure changes significantly when cyt c is incorporated: above a protein concentration of 0.2 wt.%, the interaction between the positively charged protein and the lipid headgroups leads to an increase in interfacial curvature which promotes the formation of a new micellar cubic phase, presumably of crystallographic space group P4(3)32, which the lipid system does not form on its own. The larger alpha-chymotrypsin leads to a different scenario. On the basis of an examination of the calculated geometric parameters and water volume fractions, it is concluded that the alpha-chymotrypsin molecules cannot be located exclusively in the water channels of the cubic Ia3d or P4(3)32 phases, but rather form new, less ordered (presumably cubic Pn3m) structures. The new structure disappears above the unfolding temperature of chymotrypsin and exhibits a pressure stability, which - in contrast to cyt c in MO - decreases with increasing chymotrypsin concentration in the system, While the secondary structure of cyt c remains unaffected in the confining lipid environment, the structure of alpha-chymotrypsin gets destabilized slightly, and the protein tends to aggregate even at relatively low concentrations. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Dortmund, Dept Chem Phys Chem Biophys Chem 1, D-44227 Dortmund, Germany. Argonne Natl Lab, IPNS, Argonne, IL 60439 USA. Argonne Natl Lab, BioCAT, Adv Photon Source, Argonne, IL 60439 USA. RP Winter, R (reprint author), Univ Dortmund, Dept Chem Phys Chem Biophys Chem 1, Otto Hahn Str 6, D-44227 Dortmund, Germany. EM winter@pci.chemie.uni-dortmund.de RI ID, BioCAT/D-2459-2012 FU NCRR NIH HHS [RR-08630] NR 44 TC 31 Z9 31 U1 1 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1570-9639 J9 BBA-PROTEINS PROTEOM JI BBA-Proteins Proteomics PD MAR PY 2006 VL 1764 IS 3 BP 424 EP 433 DI 10.1016/j.bbapap.2005.11.004 PG 10 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 033IA UT WOS:000236839300012 PM 16330264 ER PT J AU Smith, A Chandonia, JM Brenner, SE AF Smith, A Chandonia, JM Brenner, SE TI ANDY: a general, fault-tolerant tool for database searching on computer clusters SO BIOINFORMATICS LA English DT Article AB ANDY (seArch coordination aND analYsis) is a set of Perl programs and modules for distributing large biological database searches, and in general any sequence of commands, across the nodes of a Linux computer cluster. ANDY is compatible with several commonly used distributed resource management (DRM) systems, and it can be easily extended to new DRMs. A distinctive feature of ANDY is the choice of either dedicated or fair-use operation: ANDY is almost as efficient as single-purpose tools that require a dedicated cluster, but it runs on a general-purpose cluster along with any other jobs scheduled by a DRM. Other features include communication through named pipes for performance, flexible customizable routines for error-checking and summarizing results, and multiple fault-tolerance mechanisms. Availability: ANDY is freely available and can be obtained from http://compbio.berkeley.edu/proj/andy Contact: brenner@compbio.berkeley.edu Supplementary information: Supplemental data, figures, and a more detailed overview of the software are found at http://compbio.berkeley.edu/proj/andy. C1 Univ Calif Berkeley, Dept Plant & Microbial Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley Struct Genom Ctr, Berkeley, CA 94720 USA. Yale Univ, Dept Mol Biophys & Biochem, New Haven, CT 06520 USA. Yale Univ, Dept Comp Sci, New Haven, CT 06520 USA. RP Brenner, SE (reprint author), Univ Calif Berkeley, Dept Plant & Microbial Sci, 461A Koshland Hall, Berkeley, CA 94720 USA. EM brenner@compbio.berkeley.edu RI Brenner, Steven/A-8729-2008 OI Brenner, Steven/0000-0001-7559-6185 FU NHGRI NIH HHS [1-K22-HG00056, K22 HG000056]; NIGMS NIH HHS [1-P50-GM62412, R01-GM62621] NR 6 TC 0 Z9 0 U1 0 U2 2 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1367-4803 J9 BIOINFORMATICS JI Bioinformatics PD MAR 1 PY 2006 VL 22 IS 5 BP 618 EP 620 DI 10.1093/bioinformatics/btk020 PG 3 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Computer Science, Interdisciplinary Applications; Mathematical & Computational Biology; Statistics & Probability SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Computer Science; Mathematical & Computational Biology; Mathematics GA 016EV UT WOS:000235604400016 PM 16397008 ER PT J AU Marrey, RV Burgermeister, R Grishaber, RB Ritchie, RO AF Marrey, RV Burgermeister, R Grishaber, RB Ritchie, RO TI Fatigue and life prediction for cobalt-chromium stents: A fracture mechanics analysis SO BIOMATERIALS LA English DT Article DE fracture mechanics; fatigue; coronary stents; life prediction ID CRACKS AB To design against premature mechanical failure, most implant devices such as coronary and endovascular stents are assessed oil the basis of survival, i.e., if a fatigue life of 10(8) cycles is required, testing is performed to ascertain whether the device will survive 10(8) cycles under accelerated in vitro loading conditions. This is a far from satisfactory approach as the safety factors, which essentially tell you how close you are to failure, remain unknown; rather, the probability of fatigue failure should instead be assessed on the basis of testing to failure. In this work, a new damage-tolerant analysis of a cardiovascular stent is presented, where the design life is conservatively evaluated using a fracture mechanics methodology. In addition to enabling estimates of safe in vivo lifetimes to be made, this approach serves to quantify the effect of flaws in terms of their potential effect on device failure, and as such provides a rational basis for quality control. (C) 2005 Elsevier Ltd. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. Johnson & Johnson Co, Cordis Corp, Warren, NJ 07059 USA. RP Ritchie, RO (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM roritchie@lbl.gov RI Ritchie, Robert/A-8066-2008 OI Ritchie, Robert/0000-0002-0501-6998 NR 16 TC 113 Z9 116 U1 4 U2 30 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0142-9612 J9 BIOMATERIALS JI Biomaterials PD MAR PY 2006 VL 27 IS 9 BP 1988 EP 2000 DI 10.1016/j.biomaterials.2005.10.012 PG 13 WC Engineering, Biomedical; Materials Science, Biomaterials SC Engineering; Materials Science GA 007IO UT WOS:000234962500038 PM 16260033 ER PT J AU Hu, ZY Zhou, DM Greenberg, R Thundat, T AF Hu, ZY Zhou, DM Greenberg, R Thundat, T TI Nanopowder molding method for creating implantable high-aspect-ratio electrodes on thin flexible substrates SO BIOMATERIALS LA English DT Article DE neural prosthesis; nanoparticle; micromachining; biocompatibility; micropatterning; electrodes ID MICRO POWDER-METALLURGY; ELECTRICAL-STIMULATION; NANOPARTICLES; PROSTHESIS; COATINGS; PACKING; RETINA; FILMS; ARRAY AB Metal nanopartieles and a nanopowder molding process were used to fabricate 2D and 3D patternable structures having a height-to-width ratio of up to 10:1. By means of this process, an entire neural stimulation circuit, including stimulating electrode, connection trace, and contact pad, can be fused into one continuous, integrated structure where different sections can have different heights, widths, and shapes. The technique is suitable for mass production, and the fabricated electrode is robust and very flexible. More importantly for biomedical applications, the entire fabricated structure can be packed at room temperature onto a biocompatible flexible substrate, such as polydimethylsiloxane, parylene, and polyimide as well as other temperature-sensitive or vacuum-sensitive materials. The electrodes and wires have about the same electrical resistivities as bulk materials and desirable electrochemical properties, including low impedance. (C) 2005 Elsevier Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Second Sight Med Prod Inc, Sylmar, CA 91342 USA. Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA. RP Hu, ZY (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM huzn@ornl.gov RI Hu, Zhiyu/J-7742-2013 NR 36 TC 13 Z9 14 U1 2 U2 9 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0142-9612 J9 BIOMATERIALS JI Biomaterials PD MAR PY 2006 VL 27 IS 9 BP 2009 EP 2017 DI 10.1016/j.biomaterials.2005.10.030 PG 9 WC Engineering, Biomedical; Materials Science, Biomaterials SC Engineering; Materials Science GA 007IO UT WOS:000234962500040 PM 16310844 ER PT J AU Yang, QD Cox, BN Nalla, RK Ritchie, RO AF Yang, QD Cox, BN Nalla, RK Ritchie, RO TI Fracture length scales in human cortical bone: The necessity of nonlinear fracture models SO BIOMATERIALS LA English DT Article DE cortical bone; fracture; toughness; cohesive zone ID BRITTLE-MATRIX COMPOSITES; II DELAMINATION CRACKS; BRIDGED CRACKS; MECHANICAL-PROPERTIES; FIBROUS COMPOSITES; COMPACT-BONE; TOUGHNESS; AGE; BEHAVIOR; TISSUE AB Recently published data for fracture in human humeral cortical bone are analyzed using cohesive-zone models to deal with the nonlinear processes of material failure. Such models represent the nonlinear deformation processes involved in fracture by cohesive tractions exerted by the failing material along a fracture process zone, rather than attributing all damage to a process occurring at a single point, as in conventional linear-elastic fracture mechanics (LEFM). The relationship between the tractions and the net displacement discontinuity across the process zone is hypothesized to be a material property for bone. To test this hypothesis, the cohesive law was evaluated by analyzing published load vs. load-point displacement data from one laboratory; the calibrated law was then used to predict similar data taken for a different source of bone using a different specimen geometry in a different laboratory. Further model calculations are presented to illustrate more general characteristics of the nonlinear fracture of bone and to demonstrate in particular that LEFM is not internally consistent for all cases of interest. For example.. the fracture toughness of bone deduced via LEFM from test data is not necessarily a material constant, but will take different values for different crack lengths and test configurations. LEFM is valid when the crack is much longer than a certain length scale, representative of the length of the process zone in the cohesive model, which for human cortical bone ranges from 3 to 10 mm. Since naturally occurring bones and the specimens used to test them are not much larger than this dimension for most relevant orientations, it is apparent that only nonlinear fracture models can give an internally consistent account of their fracture. The cohesive law is thus a more complete representation of the mechanics of material failure than the single-parameter fracture toughness and may therefore provide a superior measure of bone quality. The analysis of fracture data also requires proper representation of the approximately orthotropic elasticity of the bone specimen, if the specimen is incorrectly assumed to be isotropic, the initial measured compliance cannot be reproduced to within a factor of four and the fracture toughness deduced from the measured work of fracture will be overestimated by similar to 30%. (C) 2005 Elsevier Ltd. All rights reserved. C1 Rockwell Sci Co LLC, Thousand Oaks, CA 91360 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Yang, QD (reprint author), Rockwell Sci Co LLC, 1049 Camino Dos Rios, Thousand Oaks, CA 91360 USA. EM qyang@rwsc.com RI Ritchie, Robert/A-8066-2008 OI Ritchie, Robert/0000-0002-0501-6998 FU NIDCR NIH HHS [5R01 DE015633] NR 65 TC 65 Z9 66 U1 0 U2 10 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0142-9612 J9 BIOMATERIALS JI Biomaterials PD MAR PY 2006 VL 27 IS 9 BP 2095 EP 2113 DI 10.1016/j.biomaterials.2005.09.040 PG 19 WC Engineering, Biomedical; Materials Science, Biomaterials SC Engineering; Materials Science GA 007IO UT WOS:000234962500051 PM 16271757 ER PT J AU Gu, KL Bi, LR Zhao, M Wang, C Dolan, C Kao, MC Tok, JBH Peng, SQ AF Gu, KL Bi, LR Zhao, M Wang, C Dolan, C Kao, MC Tok, JBH Peng, SQ TI Stereoselective synthesis and anti-inflammatory activities of 6-and 7-membered dioxacycloalkanes SO BIOORGANIC & MEDICINAL CHEMISTRY LA English DT Article DE stereoselective trans-acetalization; 5-amino-dioxacycloalkanes; anti-inflammatory activity ID PROTEIN-KINASE-C; CONFORMATIONALLY CONSTRAINED ANALOGS; TARGET; DIACYLGLYCEROL; INFLAMMATION; PSORIASIS; LACTONES; THERAPY; EPSILON; CANCER AB A class of 5-trifluoroacetylamino-1,3-dioxacycloalkanes, 5-benzoylamino-1,3-dioxacycloalkanes and 5-amino-1,3-dioxacycloalkane compounds were stereoselectively synthesized as potential anti-inflammatory drug candidates. The anti -inflammatory activities of these compounds were tested using the xylene-induced mouse ear edema model, from which multiple compounds possessing anti-inflammatory properties which surpass aspirin were identified; these compounds were then compared to establish structure-activity relationships. (c) 2005 Elsevier Ltd. All rights reserved. C1 Peking Univ, Coll Pharmaceut Sci, Beijing 100083, Peoples R China. Capital Univ Med Sci, Coll Pharmaceut Sci, Beijing 100054, Peoples R China. Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. RP Zhao, M (reprint author), Peking Univ, Coll Pharmaceut Sci, Beijing 100083, Peoples R China. EM tok2@llnl.gov; sqpeng@mail.bjmu.edu.cn NR 24 TC 14 Z9 15 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0968-0896 J9 BIOORGAN MED CHEM JI Bioorg. Med. Chem. PD MAR 1 PY 2006 VL 14 IS 5 BP 1339 EP 1347 DI 10.1016/j.bmc.2005.09.068 PG 9 WC Biochemistry & Molecular Biology; Chemistry, Medicinal; Chemistry, Organic SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Chemistry GA 011CE UT WOS:000235244400006 PM 16263290 ER PT J AU Dennison, SM Bowen, ME Brunger, AT Lentz, BR AF Dennison, SM Bowen, ME Brunger, AT Lentz, BR TI Neuronal SNAREs do not trigger fusion between synthetic membranes but do promote PEG-mediated membrane fusion SO BIOPHYSICAL JOURNAL LA English DT Article ID POLY(ETHYLENE GLYCOL)-INDUCED FUSION; SYNAPTIC VESICLES; UNILAMELLAR VESICLES; SINGLE-MOLECULE; LIPID TRANSFER; T-SNARES; COMPLEX; MECHANISM; KINETICS; BILAYER AB At low surface concentrations that permit formation of impermeable membranes, neuronal soluble N-ethyl maleimide sensitive factor attachment protein receptor (SNARE) proteins form a stable, parallel, trans complex when vesicles are brought into contact by a low concentration of poly(ethylene glycol) (PEG). Surprisingly, formation of a stable SNARE complex does not trigger fusion under these conditions. However, neuronal SNAREs do promote fusion at low protein/lipid ratios when triggered by higher concentrations of PEG. Promotion of PEG-triggered fusion required phosphatidylserine and depended only on the surface concentration of SNAREs and not on the formation of a trans SNARE complex. These results were obtained at protein surface concentrations reported for synaptobrevin in synaptic vesicles and with an optimally fusogenic lipid composition. At a much higher protein/lipid ratio, vesicles joined by SNARE complex slowly mixed lipids at 37 degrees C in the absence of PEG, in agreement with earlier reports. However, vesicles containing syntaxin at a high protein/lipid ratio (>= 1:250) lost membrane integrity. We conclude that the neuronal SNARE complex promotes fusion by joining membranes and that the individual proteins syntaxin and synaptobrevin disrupt membranes so as to favor formation of a stalk complex and to promote conversion of the stalk to a fusion pore. These effects are similar to the effects of viral fusion peptides and transmembrane domains, but they are not sufficient by themselves to produce fusion in our in vitro system at surface concentrations documented to occur in synaptic vesicles. Thus, it is likely that proteins or factors other than the SNARE complex must trigger fusion in vivo. C1 Univ N Carolina, Dept Biochem, Chapel Hill, NC 27599 USA. Univ N Carolina, Program Mol Cell Biophys, Chapel Hill, NC 27599 USA. Stanford Univ, Howard Hughes Med Inst, Stanford, CA 94305 USA. Stanford Univ, Dept Cellular & Mol Physiol, Stanford, CA 94305 USA. Stanford Univ, Dept Neurol, Stanford, CA 94305 USA. Stanford Univ, Dept Neurol Sci, Stanford, CA 94305 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. RP Lentz, BR (reprint author), Univ N Carolina, Dept Biochem, Chapel Hill, NC 27599 USA. EM uncbrl@med.unc.edu OI Brunger, Axel/0000-0001-5121-2036; Lentz, Barry/0000-0001-9685-8690 FU NIGMS NIH HHS [GM32707, R01 GM032707]; NIMH NIH HHS [R37 MH063105, MH63105, R01 MH063105] NR 40 TC 98 Z9 99 U1 0 U2 6 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD MAR PY 2006 VL 90 IS 5 BP 1661 EP 1675 DI 10.1529/biophysj.105.069617 PG 15 WC Biophysics SC Biophysics GA 010ZA UT WOS:000235235600020 PM 16339880 ER PT J AU Xiao, ZH Goldsmith, HL McIntosh, FA Shankaran, H Neelamegham, S AF Xiao, ZH Goldsmith, HL McIntosh, FA Shankaran, H Neelamegham, S TI Biomechanics of P-selectin PSGL-1 bonds: Shear threshold and integrin-independent cell adhesion SO BIOPHYSICAL JOURNAL LA English DT Article ID NEUTROPHIL-PLATELET ADHESION; SURFACE-ADHERENT PLATELETS; HYDRODYNAMIC SHEAR; GLYCOPROTEIN LIGAND-1; ACTIVATED PLATELETS; LEUKOCYTE ACTIVATION; MONOCLONAL-ANTIBODY; KINETIC-ANALYSIS; STABLE ADHESION; COUETTE-FLOW AB Platelet-leukocyte adhesion may contribute to thrombosis and inflammation. We examined the heterotypic interaction between unactivated neutrophils and either thrombin receptor activating peptide ( TRAP)-stimulated platelets or P-selectin-bearing beads ( Ps-beads) in suspension. Cone-plate viscometers were used to apply controlled shear rates from 14 to 3000/s. Platelet-neutrophil and bead-neutrophil adhesion analysis was performed using both flow cytometry and high-speed video-microscopy. We observed that although blocking antibodies against either P-selectin or P-selectin glycoprotein ligand-1 ( PSGL-1) alone inhibited platelet-neutrophil adhesion by; 60% at 140/s, these reagents completely blocked adhesion at 3000/s. Anti-Mac-1 alone did not alter platelet-neutrophil adhesion rates at any shear rate, though in synergy with selectin antagonists it abrogated cell binding. Unstimulated neutrophils avidly bound Ps-beads and activated platelets in an integrin-independent manner, suggesting that purely selectin-dependent cell adhesion is possible. In support of this, antagonists against P-selectin or PSGL-1 caused dissociation of previously formed platelet-neutrophil and Ps-bead neutrophil aggregates under shear in a variety of experimental systems, including in assays performed with whole blood. In studies where medium viscosity and shear rate were varied, a shear threshold for P-selectin PSGL-1 binding was also noted at shear rates,100/s when Ps-beads collided with isolated neutrophils. Results are discussed in light of biophysical computations that characterize the collision between unequal-size particles in linear shear flow. Overall, our studies reveal an integrin-independent regime for cell adhesion and weak shear threshold for P-selectin PSGL-1 interactions that may be physiologically relevant. C1 SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA. McGill Univ, Dept Med, Montreal, PQ, Canada. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Neelamegham, S (reprint author), SUNY Buffalo, Dept Chem & Biol Engn, 906 Furnas Hall, Buffalo, NY 14260 USA. EM neel@eng.buffalo.edu OI Neelamegham, Sriram/0000-0002-1371-8500 FU NHLBI NIH HHS [HL63014, HL76211, K02 HL076211, R01 HL063014] NR 58 TC 15 Z9 16 U1 2 U2 5 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD MAR PY 2006 VL 90 IS 6 BP 2221 EP 2234 DI 10.1529/biophysj.105.065789 PG 14 WC Biophysics SC Biophysics GA 017RA UT WOS:000235709500036 PM 16387772 ER PT J AU Tadesse, I Isoaho, SA Green, FB Puhakka, JA AF Tadesse, I Isoaho, SA Green, FB Puhakka, JA TI Lime enhanced chromium removal in advanced integrated wastewater pond system SO BIORESOURCE TECHNOLOGY LA English DT Article DE leather tanning wastewater; lime alkalinity; pH adjustment; chromium precipitation; horizontal settling tanks; AFP; AIWPS ID TANNERY EFFLUENT AB The removal of trivalent chromium from a combined tannery effluent in horizontal settling tanks and subsequent Advanced Integrated Wastewater Pond System (AIWPS) reactors was investigated. The raw combined effluent from Modjo tannery had pH in the range of 11.2-12. At this pH, a trivalent chromium removal of 46-72% was obtained in the horizontal settling tanks after a one-day detention time. Trivalent chromium precipitated as chromium hydroxide, Cr(OH)(3). 58-95% Cr(III) was removed in the advanced facultative pond (AFP) where the water column pH of 7.2-8.4 was close to pH 8, which is the optimum precipitation pH for trivalent chromium. Chromium removals in the secondary facultative pond (SFP) and maturation pond (MP) were 30-50% and 6-16%, respectively. With Cr(III) concentration of 0.2-0.8 mg/l in the final treated effluent, the AMPS preceded by horizontal settling tanks produced effluent that could easily meet most of the current Cr(III) discharge limits to receive water bodies. (c) 2005 Elsevier Ltd. All rights reserved. C1 Tampere Univ Technol, Inst Environm Engn & Biotechnol, Tampere 33101, Finland. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Tadesse, I (reprint author), Tampere Univ Technol, Inst Environm Engn & Biotechnol, POB 541, Tampere 33101, Finland. EM issayas.tadesse@sbcglobal.net RI Puhakka, Jaakko/G-4220-2014 NR 21 TC 27 Z9 27 U1 0 U2 10 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0960-8524 J9 BIORESOURCE TECHNOL JI Bioresour. Technol. PD MAR PY 2006 VL 97 IS 4 BP 529 EP 534 DI 10.1016/j.biortech.2005.04.028 PG 6 WC Agricultural Engineering; Biotechnology & Applied Microbiology; Energy & Fuels SC Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels GA 002BX UT WOS:000234587500001 PM 15963717 ER PT J AU Saez-Miranda, JC Saliceti-Piazza, L McMillan, JD AF Saez-Miranda, JC Saliceti-Piazza, L McMillan, JD TI And analysis of intracellular ATP levels in metabolically engineered Zymomonas mobilis fermenting glucose and xylose mixtures SO BIOTECHNOLOGY PROGRESS LA English DT Article ID NUCLEAR-MAGNETIC-RESONANCE; ETHANOL-PRODUCTION; ESCHERICHIA-COLI; ACETIC-ACID; ADENOSINE-TRIPHOSPHATE; GROWTH; POOL; PERFORMANCE; BIOMASS; BIOLUMINESCENCE AB Intracellular adenosine-Y-triphosphate (ATP) levels were measured in a metabolically engineered Zymomonas mobilis over the course of batch fermentations of glucose and xylose mixtures. Fermentations were conducted over a range of pH (5-6) in the presence of varying initial amounts of acetic acid (0-8 g/L) using a 10% (w/v) total sugar concentration (glucose only, xylose only, or 5% glucose/5% xylose mixture). Over the design space investigated. ethanol process yields varied between 56.6% and 92.3% +/- 1.3% of theoretical, depending upon the test conditions. The large variation in process yields reflects the strong effect pH plays in modulating the inhibitory effect of acetic acid on fermentation performance. A corresponding effect was observed on maximum cellular specific growth rates, with the rates varying between a low of 0.15 h(-1) observed at pH 5 in the presence of 8 g/L acetic acid to a high of 0.32 +/- 0.02 h(-1) obtained at pH 5 or 6 when no acetic acid was initially present. While substantial differences were observed in intracellular specific ATP concentration profiles depending upon fermentation conditions, maximum intracellular ATP accumulation levels varied within a relatively narrow range (1.5-3.8 mg ATP/g dry cell mass). Xylose fermentations produced and accumulated ATP at much slower rates than mixed sugar fermentations (5% glucose, 5% xylose), and the ATP production and accumulation rates in the mixed sugar fermentations were slightly slower than in glucose fermentations. Results demonstrate that higher levels of acetic acid delay the onset and influence the extent of intracellular ATP accumulation. ATP production and accumulation rates were most sensitive to acetic acid at lower values of pH. C1 Univ Puerto Rico, Dept Chem Engn, Mayaguez, PR 00681 USA. Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO 80401 USA. RP Saez-Miranda, JC (reprint author), Univ Puerto Rico, Dept Chem Engn, Mayaguez Campus,POB 9046, Mayaguez, PR 00681 USA. EM juancarlos12@hotmail.com NR 42 TC 11 Z9 12 U1 1 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 8756-7938 J9 BIOTECHNOL PROGR JI Biotechnol. Prog. PD MAR-APR PY 2006 VL 22 IS 2 BP 359 EP 368 DI 10.1021/bp050115c PG 10 WC Biotechnology & Applied Microbiology; Food Science & Technology SC Biotechnology & Applied Microbiology; Food Science & Technology GA 032OG UT WOS:000236783400003 PM 16599547 ER PT J AU Pagel, JM Appelbaum, FR Eary, JF Rajendran, J Fisher, DR Gooley, T Ruffner, K Nemecek, E Sickle, E Durack, L Carreras, J Horowitz, MM Press, OW Gopal, AK Martin, PJ Bernstein, ID Matthews, DC AF Pagel, JM Appelbaum, FR Eary, JF Rajendran, J Fisher, DR Gooley, T Ruffner, K Nemecek, E Sickle, E Durack, L Carreras, J Horowitz, MM Press, OW Gopal, AK Martin, PJ Bernstein, ID Matthews, DC TI I-131-anti-CD45 antibody plus busulfan and cyclophosphamide before allogeneic hematopoietic cell transplantation for treatment of acute myeloid leukemia in first remission SO BLOOD LA English DT Article ID BONE-MARROW-TRANSPLANTATION; ACUTE MYELOGENOUS LEUKEMIA; TOTAL-BODY IRRADIATION; NON-HODGKINS-LYMPHOMA; RADIOLABELED MONOCLONAL-ANTIBODIES; PHASE-I-II; MYELODYSPLASTIC SYNDROME; INTENSIVE CHEMOTHERAPY; POSTREMISSION THERAPY; ANTI-CD45 ANTIBODY AB In an attempt to improve outcomes for patients with acute myeloid leukemia (AML) after allogeneic hematopoietic cell transplantation (HCT), we conducted a phase 1/2 study in which targeted irradiation delivered by I-131-anti-CD45 antibody was combined with targeted busulfan (BU; area-under-curve, 600-900 ng/mL) and cyclophosphamide (CY; 120 mg/kg). Fifty-two (88%) of 59 patients receiving a trace I-131-labeled dose of 0.5 mg/kg anti-CD45 murine antibody had higher estimated absorbed radiation in bone marrow and spleen than in any other organ. Forty-six patients were treated with 102 to 298 mCi (3774-11 026 MBq) I-131, delivering an estimated 5.3 to 19 (mean, 11.3) Gy to marrow, 17-72 (mean, 29.7) Gy to spleen, and 3.5 Gy (n = 4) to 5.25 Gy (n = 42) to the liver. The estimated 3-year nonrelapse mortality and disease-free survival (DFS) were 21% and 61%, respectively. These, results were compared with those from 509 similar International Bone Marrow Transplant Registry patients who underwent transplantation using BU/CY alone. After adjusting for differences in age and cytogenetics risk, the hazard of mortality among all anti body-treated patients was 0.65 times that of the Registry patients (95% CI 0.39-1.08; P = .09). The addition of targeted hematopoietic irradiation to conventional BU/CY is feasible and well tolerated, and phase 2 results are sufficiently encouraging to warrant further study. C1 Fred Hutchinson Canc Res Ctr, Div Clin Res, Seattle, WA 98109 USA. Univ Washington, Dept Pediat, Seattle, WA 98195 USA. Univ Washington, Dept Med, Seattle, WA USA. Univ Washington, Dept Radiol, Seattle, WA 98195 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. Med Coll Wisconsin, Milwaukee, WI 53226 USA. RP Pagel, JM (reprint author), Fred Hutchinson Canc Res Ctr, Div Clin Res, D5-380,1100 Fairview Ave N,POB 19024, Seattle, WA 98109 USA. EM jpagel@fhcrc.org FU NCI NIH HHS [CA76930, CA18029, CA44991, K08CA95448]; NCRR NIH HHS [M01RR-00037] NR 62 TC 81 Z9 84 U1 0 U2 5 PU AMER SOC HEMATOLOGY PI WASHINGTON PA 1900 M STREET. NW SUITE 200, WASHINGTON, DC 20036 USA SN 0006-4971 J9 BLOOD JI Blood PD MAR 1 PY 2006 VL 107 IS 5 BP 2184 EP 2191 DI 10.1182/blood-2005-06-2317 PG 8 WC Hematology SC Hematology GA 016PQ UT WOS:000235632700068 PM 16254140 ER PT J AU Bhattacharyya, MH Valdez, M Tormos, K Agha, L Smith, L Wilson, AK AF Bhattacharyya, MH Valdez, M Tormos, K Agha, L Smith, L Wilson, AK TI Role of CCN1 protein in osteoclast-mediated bone resorption after low-level cadmium SO BONE LA English DT Meeting Abstract CT 11th and Valedictory Workshop on Cell Biology of Bone and Cartilage in Health and Disease CY MAR 18-21, 2006 CL Davos, SWITZERLAND C1 Argonne Natl Lab, Argonne, IL 60439 USA. Benedictine Univ, Lisle, IL 60532 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 8756-3282 J9 BONE JI Bone PD MAR PY 2006 VL 38 IS 3 SU 1 BP S24 EP S24 DI 10.1016/j.bone.2006.01.106 PG 1 WC Endocrinology & Metabolism SC Endocrinology & Metabolism GA 022JI UT WOS:000236051300047 ER PT J AU Tomasi, D AF Tomasi, D TI Optimization of biplanar gradient coils for magnetic resonance imaging SO BRAZILIAN JOURNAL OF PHYSICS LA English DT Article DE magnetic resonance imaging; MRI scanners ID DESIGN; LENGTH; SET AB "Open" magnetic resonance imaging (MRI) scanners are frequently based on electromagnets or permanent magnets, and require self-shielded planar gradient coils to prevent image artifacts resulting from eddy currents in metallic parts of the scanner. This work presents an optimization method for the development of self-shielded gradient coils with biplanar geometry for "Open" MRI scanners. Compared to other optimization methods, this simple approach results in coils that produce larger uniform gradient volumes, and have simple and scalable manufacture. C1 Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. RP Tomasi, D (reprint author), Brookhaven Natl Lab, Dept Med, 30 Bell St, Upton, NY 11973 USA. RI Tomasi, Dardo/J-2127-2015 NR 15 TC 5 Z9 5 U1 5 U2 8 PU SOCIEDADE BRASILEIRA FISICA PI SAO PAULO PA CAIXA POSTAL 66328, 05315-970 SAO PAULO, BRAZIL SN 0103-9733 J9 BRAZ J PHYS JI Braz. J. Phys. PD MAR PY 2006 VL 36 IS 1A BP 23 EP 27 PG 5 WC Physics, Multidisciplinary SC Physics GA 026FT UT WOS:000236325500008 ER PT J AU Tomasi, D Ernst, T AF Tomasi, D Ernst, T TI A simple theory for vibration of MRI gradient coils SO BRAZILIAN JOURNAL OF PHYSICS LA English DT Article DE MRI; MRI coils ID SCANNER ACOUSTIC NOISE; FUNCTIONAL MRI; BRAIN ACTIVATION; SOUND; INTERFERENCE; MOTOR; ECHO; FMRI AB Vibrations of a string can provide a model for vibrations of MRI coil assemblies. The string model for the vibrations of MRI coils is presented, and compared with experimental results. Gradient coils exhibit resonant modes because of the finite coil length, l, and the elasticity of materials that comprise the assembly. The resonance frequencies depend on l and the Young modulus, as well as on the Current distribution. Under longitudinal gradient pulses, anti-symmetrical modes of surface vibration are produced due to the symmetry of current distribution. In contrast, transverse gradient pulses produce coil bending that results in symmetrical vibration modes of the coil axis. The viscosity of the assembly materials controls the width of the vibrational resonance modes. Experimental results are in agreement with this simple string model. C1 Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. Univ Hawaii, Dept Med, Honolulu, HI 96813 USA. RP Tomasi, D (reprint author), Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. RI Tomasi, Dardo/J-2127-2015 NR 19 TC 6 Z9 6 U1 1 U2 11 PU SOCIEDADE BRASILEIRA FISICA PI SAO PAULO PA CAIXA POSTAL 66328, 05315-970 SAO PAULO, BRAZIL SN 0103-9733 J9 BRAZ J PHYS JI Braz. J. Phys. PD MAR PY 2006 VL 36 IS 1A BP 34 EP 39 PG 6 WC Physics, Multidisciplinary SC Physics GA 026FT UT WOS:000236325500010 ER PT J AU Pisarski, RD AF Pisarski, RD TI Chasing the unicorn: RMC and the QGP SO BRAZILIAN JOURNAL OF PHYSICS LA English DT Article; Proceedings Paper CT 25th Brazilian National Meeting on Particles and Fields CY AUG 25-27, 2004 CL Caxambu, BRAZIL DE QCD; quarks; gluons; RHIC ID POLYAKOV LOOP; QUARK AB At nonzero temperature, it is expected that QCD undergoes a phase transition to a deconfined, chirally symmetric phase, the Quark-Gluon Plasma (QGP). I review what we expect theoretically about this possible transition, and what we have learned from heavy ion experiments at RHIC. I argue that while there are unambiguous signals for qualitatively new behavior at RHIC, versus experiments at lower energies, that in detail, no simple theoretical model can explain all salient features of the data. C1 Brookhaven Natl Lab, Nucl Theory & High Energy Theory Nucl Theory Grp, Upton, NY 11973 USA. Niels Bohr Inst, DK-2100 Copenhagen, Denmark. Goethe Univ Frankfurt, Frankfurt Inst Adv Study, D-60054 Frankfurt, Germany. RP Pisarski, RD (reprint author), Brookhaven Natl Lab, Nucl Theory & High Energy Theory Nucl Theory Grp, Upton, NY 11973 USA. NR 27 TC 3 Z9 3 U1 0 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0103-9733 EI 1678-4448 J9 BRAZ J PHYS JI Braz. J. Phys. PD MAR PY 2006 VL 36 IS 1B BP 122 EP 131 DI 10.1590/S0103-97332006000200004 PG 10 WC Physics, Multidisciplinary SC Physics GA 028GI UT WOS:000236474600004 ER PT J AU Wilson, C Brigmon, RL Knox, A Seaman, J Smith, G AF Wilson, C Brigmon, RL Knox, A Seaman, J Smith, G TI Effects of microbial and phosphate amendments on the bioavailability of lead (Pb) in shooting range soil SO BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY LA English DT Article ID CONTAMINATED SEDIMENTS; HYDROXYAPATITE; IMMOBILIZATION; BIOSURFACTANTS; URANIUM C1 Westinghouse Savannah River Co, Savannah River Natl Lab, Aiken, SC 29808 USA. Univ S Carolina, Aiken, SC 29801 USA. Savannah River Ecol Lab, Aiken, SC 29808 USA. RP Brigmon, RL (reprint author), Westinghouse Savannah River Co, Savannah River Natl Lab, Bldg 999W, Aiken, SC 29808 USA. NR 22 TC 17 Z9 17 U1 1 U2 5 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0007-4861 J9 B ENVIRON CONTAM TOX JI Bull. Environ. Contam. Toxicol. PD MAR PY 2006 VL 76 IS 3 BP 392 EP 399 DI 10.1007/s00128-006-0934-x PG 8 WC Environmental Sciences; Toxicology SC Environmental Sciences & Ecology; Toxicology GA 039EV UT WOS:000237289700004 PM 16652251 ER PT J AU Turchi, PEA Kaufman, L Liu, ZK AF Turchi, PEA Kaufman, L Liu, ZK TI Modeling of Ni-Cr-Mo based alloys: Part I - phase stability SO CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY LA English DT Article ID SYSTEM AB The CALPHAD approach is applied to the study of the stability of several candidate Ni-Cr-Mo based alloys for use in waste disposal canisters for the Yucca Mountain Project (YMP). The stability of occurring phases in the as-fabricated materials is investigated since temporal evolution of precipitates at service temperatures can significantly alter their corrosion resistance and mechanical properties. To account for the stability of the Ni2Cr phase and the hypothetical Ni2Mo and Ni2W phases, available thermodynamic data and ab initio electronic structure-based results were employed. A comparative study of property diagrams for the nominal composition of several YMP candidate alloys is presented. These results form the basis for experimental and theoretical studies of kinetics of phase transformation and aging to be presented in Part II. (c) 2005 Elsevier Ltd. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA. RP Turchi, PEA (reprint author), Lawrence Livermore Natl Lab, L-372,POB 808, Livermore, CA 94551 USA. EM turchi1@llnl.gov RI Liu, Zi-Kui/A-8196-2009 OI Liu, Zi-Kui/0000-0003-3346-3696 NR 30 TC 53 Z9 53 U1 2 U2 14 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 MAR PY 2006 VL 30 IS 1 BP 70 EP 87 DI 10.1016/j.calphad.2005.10.003 PG 18 WC Thermodynamics; Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Thermodynamics; Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 020RX UT WOS:000235929100010 ER PT J AU DeGregorio, MW Dingley, KH Wurz, GT Ubick, E Turteltaub, KW AF DeGregorio, MW Dingley, KH Wurz, GT Ubick, E Turteltaub, KW TI Accelerator mass spectrometry allows for cellular quantification of doxorubicin at femtomolar concentrations SO CANCER CHEMOTHERAPY AND PHARMACOLOGY LA English DT Article DE accelerator mass spectrometry; doxorubicin; multidrug resistance; breast cancer ID INDUCED FLUORESCENCE DETECTION; MDR1 P-GLYCOPROTEIN; BREAST-CANCER CELLS; CAPILLARY-ELECTROPHORESIS; MULTIDRUG-RESISTANCE; PHARMACOKINETIC ANALYSIS; LIQUID-CHROMATOGRAPHY; BIOCHEMICAL SAMPLES; MAGNETIC-RESONANCE; TRANSPORT ACTIVITY AB Accelerator mass spectrometry (AMS) is a highly sensitive analytical methodology used to quantify the content of radioisotopes, such as C-14, in a sample. The primary goals of this work were to demonstrate the utility of AMS in determining total cellular [C-14] anthracycline concentrations following administration of doxorubicin (DOX) and to develop a sensitive assay that is superior to high performance liquid chromatography (HPLC) for the quanti. cation of [C-14] anthracycline at the tumor level. In order to validate the sensitivity of AMS versus HPLC with fluorescence detection, we performed three studies comparing the cellular accumulation of DOX: one in vitro cell line study, and two in vivo xenograft mouse studies. Using AMS, we quanti. fied cellular [C-14] anthracycline content up to 4 h following in vitro exposure at concentrations ranging from 0.2 pg/ml (345 mu M) to 2 mu g/ml (3.45 mu M) [C-14] DOX. The results of this study show that, compared to standard fluorescence-based HPLC, the AMS method was over five orders of magnitude more sensitive. Two in vivo studies compared the sensitivity of AMS to HPLC using a nude mouse xenograft model in which breast cancer cells were implanted subcutaneously. After sufficiently large tumors formed, [C-14] DOX was administered intravenously at two dose levels. Additionally, we tested the AMS method in a nude mouse xenograft model of multidrug resistance (MDR) in which each mouse was implanted with both wild type and MDR+ cells on opposite flanks. The results of the second and third studies showed that [C-14] anthracycline concentrations were significantly higher in the wild type tumors compared to the MDR+ tumors, consistent with the MDR model. Although this method does not discriminate between parent drug and metabolites, the extreme sensitivity of AMS should facilitate similar studies in humans to establish target site drug delivery and to potentially determine the optimal treatment dose and regimen. C1 Univ Calif Davis, Dept Internal Med, Div Hematol & Oncol, Ctr Canc, Sacramento, CA 95817 USA. Lawrence Livermore Natl Lab, Biol Sci Directorate, Livermore, CA 94551 USA. RP DeGregorio, MW (reprint author), Univ Calif Davis, Dept Internal Med, Div Hematol & Oncol, Ctr Canc, 4501 X St,Room 3016, Sacramento, CA 95817 USA. EM mwdegregorio@ucdavis.edu FU NCI NIH HHS [CA93373-01]; NCRR NIH HHS [RR13461] NR 27 TC 5 Z9 6 U1 1 U2 8 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0344-5704 J9 CANCER CHEMOTH PHARM JI Cancer Chemother. Pharmacol. PD MAR PY 2006 VL 57 IS 3 BP 335 EP 342 DI 10.1007/s00280-005-0060-1 PG 8 WC Oncology; Pharmacology & Pharmacy SC Oncology; Pharmacology & Pharmacy GA 996US UT WOS:000234201200009 PM 16047147 ER PT J AU Cleaver, JE Cooper, PK Linn, SM Bissell, MJ AF Cleaver, JE Cooper, PK Linn, SM Bissell, MJ TI Beatrice A Singer: In memoriam (1923-2005) SO CANCER RESEARCH LA English DT Biographical-Item C1 Univ Calif San Francisco, Sch Med, San Francisco, CA 94143 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA USA. RP Cleaver, JE (reprint author), Univ Calif San Francisco, Sch Med, 2340 Sutter St,Room N424,Box 0808, San Francisco, CA 94143 USA. EM Jcleaver@cc.ucsf.edu NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA 615 CHESTNUT ST, 17TH FLOOR, PHILADELPHIA, PA 19106-4404 USA SN 0008-5472 J9 CANCER RES JI Cancer Res. PD MAR 1 PY 2006 VL 66 IS 5 BP 2876 EP 2877 DI 10.1158/0008-5472.CAN-06-0033 PG 2 WC Oncology SC Oncology GA 019HO UT WOS:000235826400050 ER PT J AU Montano, M Tang, DC Somorjai, GA AF Montano, M Tang, DC Somorjai, GA TI Scanning tunneling microscopy (STM) at high pressures. Adsorption and catalytic reaction studies on platinum and rhodium single crystal surfaces SO CATALYSIS LETTERS LA English DT Article DE adsorption studies by STM; catalytic reaction by STM; platinum and rhodium crystal surfaces ID VIBRATIONAL SPECTROSCOPY; ETHYLENE HYDROGENATION; GAS-PHASE; PT(111); RH(111); CO; CYCLOHEXENE; DEHYDROGENATION; EQUILIBRIUM; LEED AB In this paper, we review the experimental results that were obtained using our high pressure-high temperature STM system (HP/HT STM) for studies of gas adsorption in a broad pressure range. Measurements are carried out in equilibrium with the gas phase. We discovered ordered surface structures of adsorbates that do not exist at low pressures. It appears that small increases in coverage due to increased ambient pressures cause ordering due to repulsive adsorbate-adsorbate interactions. Adsorption isotherms, one of the oldest fields of surface thermodynamics, can be revisited using HP/HT STM to obtain molecular surface structures and surface phase diagrams as the gas pressure is altered. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. 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@socrates.berkeley.edu NR 20 TC 15 Z9 15 U1 4 U2 13 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 1011-372X J9 CATAL LETT JI Catal. Lett. PD MAR PY 2006 VL 107 IS 3-4 BP 131 EP 141 DI 10.1007/s10562-005-0015-5 PG 11 WC Chemistry, Physical SC Chemistry GA 023GM UT WOS:000236114500001 ER PT J AU Egging, DF van Vlijmen, I Starcher, B Gijsen, Y Zweers, MC Blankevoort, L Bristow, J Schalkwijk, J AF Egging, DF van Vlijmen, I Starcher, B Gijsen, Y Zweers, MC Blankevoort, L Bristow, J Schalkwijk, J TI Dermal connective tissue development in mice: an essential role for tenascin-X SO CELL AND TISSUE RESEARCH LA English DT Article DE tenascin-X; collagen; elastin; development; Ehlers-Danlos syndrome; mouse (TNX knockout) ID EHLERS-DANLOS-SYNDROME; ELASTIC FIBERS; DEFICIENT MICE; FATTY-ACIDS; COLLAGEN; MOUSE; SKIN; FIBRILLOGENESIS; IDENTIFICATION; ABNORMALITIES AB Deficiency of the extracellular matrix protein tenascin-X (TNX) causes a recessive form of Ehlers-Danlos syndrome (EDS) characterized by hyperextensible skin and hypermobile joints. It is not known whether the observed alterations of dermal collagen fibrils and elastic fibers in these patients are caused by disturbed assembly and deposition or by altered stability and turnover. We used biophysical measurements and immunofluorescence to study connective tissue properties in TNX knockout and wild-type mice. We found that TNX knockout mice, even at a young age, have greatly disturbed biomechanical properties of the skin. No joint abnormalities were noted at any age. The spatio-temporal expression of TNX during normal mouse skin development, during embryonic days 13-19 (E13-E19), was distinct from tropoelastin and the dermal fibrillar collagens type I, III, and V. Our data show that TNX is not involved in the earliest phase (E10-E14) of the deposition of collagen fibrils and elastic fibers during fetal development. From E15 to E19, TNX starts partially to colocalize with the dermal collagens and elastin, and in adult mice, TNX is present in the entire dermis. In adult TNX knockout mice, we observed an apparent increase of elastin. We conclude that TNX knockout mice only partially recapitulate the phenotype of TNX-deficient EDS patients, and that TNX could potentially be involved in maturation and/or maintenance of the dermal collagen and elastin network. C1 Radboud Univ Nijmegen, Med Ctr, Ctr Mol Life Sci, Dept Dermatol, NL-6500 HB Nijmegen, Netherlands. Univ Texas Hlth Ctr, Dept Biochem, Tyler, TX 75710 USA. Univ Amsterdam, Acad Med Ctr, Orthotrauma Res Ctr Amsterdam, Dept Orthoped, NL-1105 AZ Amsterdam, Netherlands. Univ Calif San Francisco, Dept Pediat, San Francisco, CA 94143 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genome Sci, Berkeley, CA 94720 USA. RP Egging, DF (reprint author), Radboud Univ Nijmegen, Med Ctr, Ctr Mol Life Sci, Dept Dermatol, POB 9101, NL-6500 HB Nijmegen, Netherlands. EM d.egging@derma.umcn.nl RI Schalkwijk, Joost/N-1774-2013; van Vlijmen-Willems, Ivonne/P-5336-2015 NR 38 TC 17 Z9 18 U1 1 U2 3 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0302-766X J9 CELL TISSUE RES JI Cell Tissue Res. PD MAR PY 2006 VL 323 IS 3 BP 465 EP 474 DI 10.1007/s00441-005-0100-5 PG 10 WC Cell Biology SC Cell Biology GA 011ZF UT WOS:000235307300011 PM 16331473 ER PT J AU Nam, JM Nair, PM Neve, RM Gray, JW Groves, JT AF Nam, JM Nair, PM Neve, RM Gray, JW Groves, JT TI A fluid membrane-based soluble ligand-display system for live-cell assays SO CHEMBIOCHEM LA English DT Article DE cell assay; growth factors; membranes; receptor tyrosine kinase; soluble signaling ligand ID SUPPORTED LIPID-BILAYERS; ERBB SIGNALING NETWORK; MICROARRAYS; ADHESION; MOLECULES; SCREENS; CANCER C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. Univ Calif San Francisco, Lab Med & Radiat Oncol, San Francisco, CA 94143 USA. Seoul Natl Univ, Sch Chem, Seoul 151747, South Korea. RP Groves, JT (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM jtgroves@lbl.gov FU NCI NIH HHS [U54 CA112970-02, U54 CA112970] NR 30 TC 27 Z9 28 U1 0 U2 6 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1439-4227 J9 CHEMBIOCHEM JI ChemBioChem PD MAR PY 2006 VL 7 IS 3 BP 436 EP 440 DI 10.1002/cbic.200500479 PG 5 WC Biochemistry & Molecular Biology; Chemistry, Medicinal SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy GA 020SN UT WOS:000235930800007 PM 16456901 ER PT J AU Cao, CS Fung, SC AF Cao, CS Fung, SC TI Comparison of heterogeneous catalyst activities in various reactor types and reaction conditions SO CHEMICAL ENGINEERING & TECHNOLOGY LA English DT Article AB A comprehensive reactor analysis package is provided that will enable more accurate comparison of catalyst activity in various reactor types and reaction conditions. Conservation of mass was applied to formulate the performance equations for catalytic batch, plug flow, continuous stirred tank, and pulse reactors. The weight hourly space velocity was correlated with the conversion and the reaction rate in many integral forms. The apparent reaction rate constant can be obtained from kinetic data for each reactor type. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Exxon Res & Engn Co, Annandale, NJ 08801 USA. RP Cao, CS (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM chunshecao@yvahoo.com NR 13 TC 0 Z9 0 U1 0 U2 2 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0930-7516 J9 CHEM ENG TECHNOL JI Chem. Eng. Technol. PD MAR PY 2006 VL 29 IS 3 BP 307 EP 312 DI 10.1002/ceat.200500318 PG 6 WC Engineering, Chemical SC Engineering GA 022KZ UT WOS:000236056000002 ER PT J AU Romanov, V Soong, Y Schroeder, K AF Romanov, V Soong, Y Schroeder, K TI Volumetric effects in coal sorption capacity measurements SO CHEMICAL ENGINEERING & TECHNOLOGY LA English DT Article ID CARBON-DIOXIDE; ADSORPTION-ISOTHERMS; ACTIVATED CARBON; METHANE; PRESSURE; TEMPERATURE; NITROGEN; MPA; DRY AB Many types of materials e.g., rubber, polymer, coal, change their volume and structure after absorption of gaseous and liquid substances. Various kinds of volume changes affect the accuracy of absorption measurements by gravimetric and manometric methods, the two major techniques currently employed. The errors associated with the volumetric effects, specifically, the case of carbon dioxide sorption on coal, were investigated. It was demonstrated that the resulting error in the buoyancy correction in the gravimetric method is equivalent to the corresponding error in the assumed void volume in the manometric method. It is suggested that the integration of the two methods, combined with the binary gas mixture technique of in-situ volume measurement, will contribute to dramatically improve the accuracy of absorption measurements for plastic materials. C1 US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. RP Romanov, V (reprint author), US DOE, Natl Energy Technol Lab, POB 10940, Pittsburgh, PA 15236 USA. EM Romanov@or.netl.doe.gov RI Romanov, Vyacheslav/C-6467-2008 OI Romanov, Vyacheslav/0000-0002-8850-3539 NR 18 TC 22 Z9 23 U1 0 U2 3 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0930-7516 J9 CHEM ENG TECHNOL JI Chem. Eng. Technol. PD MAR PY 2006 VL 29 IS 3 BP 368 EP 374 DI 10.1002/ceat.200500242 PG 7 WC Engineering, Chemical SC Engineering GA 022KZ UT WOS:000236056000011 ER PT J AU Gutowski, M Autrey, T AF Gutowski, Maciej Autrey, To TI Hydrogen gets on board SO CHEMISTRY WORLD LA English DT Article ID STORAGE C1 Pacific NW Natl Lab, Washington, DC USA. RP Gutowski, M (reprint author), Pacific NW Natl Lab, Washington, DC USA. NR 5 TC 10 Z9 10 U1 1 U2 4 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1473-7604 J9 CHEM WORLD-UK JI Chem. World PD MAR PY 2006 VL 3 IS 3 BP 44 EP 48 PG 5 WC Chemistry, Multidisciplinary SC Chemistry GA 081OQ UT WOS:000240327300062 ER PT J AU Bruen, MP Ottsen, CE Laughton, C AF Bruen, MP Ottsen, CE Laughton, C TI Through it all SO CIVIL ENGINEERING LA English DT Article C1 MWH, Bellevue, WA USA. MWH, Chicago, IL USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Bruen, MP (reprint author), MWH, Bellevue, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASCE-AMER SOC CIVIL ENGINEERS PI RESTON PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA SN 0885-7024 J9 CIVIL ENG JI Civil Eng. PD MAR PY 2006 VL 76 IS 3 BP 46 EP 51 PG 6 WC Engineering, Civil SC Engineering GA 022MM UT WOS:000236059900019 ER PT J AU Sun, S Bleck, R AF Sun, S Bleck, R TI Multi-century simulations with the coupled GISS-HYCOM climate model: control experiments SO CLIMATE DYNAMICS LA English DT Article ID ANTARCTIC CIRCUMPOLAR CURRENT; COORDINATE OCEAN MODEL; EDDY-INDUCED ADVECTION; ONE-DIMENSIONAL MODEL; THERMOHALINE CIRCULATION; SEA-ICE; GLOBAL OCEAN; DEEP CONVECTION; SYSTEM MODEL; EL-NINO AB Multi-century climate simulations obtained with the GISS atmospheric general circulation model coupled to the hybrid-isopycnic ocean model HYCOM are described. Greenhouse gas concentrations are held fixed in these experiments to investigate the coupled model's ability to reproduce the major features of today's climate with minimal drift. Emphasis is placed on the realism of the oceanic general circulation and its effect on air-sea exchange processes. Several model runs using different closures for turbulent vertical exchange as well as improvements to reduce vertical numerical diffusion are compared with climate observations. As in previous studies, the Southern Ocean emerges as the Achilles Heel of the ocean model; deficiencies in its physical representation had far-reaching consequences in early experiments with the coupled model and have provided the strongest impetus for model improvement. The overarching goal of this work is to add diversity to the pool of ocean models available for climate prediction and thereby reduce biases that may stand in the way of assessing climate prediction uncertainty. C1 NASA, Goddard Inst Space Studies, New York, NY 10025 USA. Los Alamos Natl Lab, Los Alamos, NM USA. RP Sun, S (reprint author), NASA, Goddard Inst Space Studies, New York, NY 10025 USA. EM ssun@giss.nasa.gov; rbleck@giss.nasa.gov RI Sun, Shan/H-2318-2015 NR 67 TC 24 Z9 24 U1 0 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0930-7575 J9 CLIM DYNAM JI Clim. Dyn. PD MAR PY 2006 VL 26 IS 4 BP 407 EP 428 DI 10.1007/s00382-005-0091-7 PG 22 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 011ZG UT WOS:000235307400005 ER PT J AU Murphy, JJ Shaddix, CR AF Murphy, JJ Shaddix, CR TI Combustion kinetics of coal chars in oxygen-enriched environments SO COMBUSTION AND FLAME LA English DT Article DE coal, char; combustion; kinetics; oxy-fuel; O-2 enriched ID INTRINSIC KINETICS; PULVERIZED FUEL; HIGH-PRESSURE; OXIDATION; PARTICLE; GASIFICATION; MIXTURES; MODELS; RATES; CO2 AB Oxygen-enhanced and oxygen-fired pulverized coal combustion is actively being investigated to achieve emission reductions and reductions in flue gas cleanup costs, as well as for coal-bed methane and enhanced oil recovery applications. To fully understand the results of pilot scale tests and to accurately predict scale-up performance through CFD modeling, accurate rate expressions are needed to describe coal char combustion under these unconventional combustion conditions. In the work reported here, the combustion rates of two pulverized coal chars have been measured in both conventional and oxygen-enriched atmospheres. A combustion-driven entrained flow reactor equipped with an optical particle-sizing pyrometry diagnostic and a rapid-quench sampling probe has been used for this investigation. Highvale subbituminous coal and a high-volatile eastern United States bituminous coal have been investigated, over oxygen concentrations ranging from 6 to 36 mol% and gas temperatures of 1320-1800 K. The results from these experiments demonstrate that pulverized coal char particles burn under increasing kinetic control in elevated oxygen environments, despite their higher burning rates in these environments. Empirical fits to the data have been successfully performed over the entire range of oxygen concentrations using a single-film oxidation model. Both a simple nth-order Arrhenius expression and an nth-order Langmuir-Hinshelwood kinetic equation provide good fits to the data. Local fits of the nth-order Arrhenius expression to the oxygen-enriched and oxygen-depleted data produce lower residuals in comparison to fits of the entire dataset. These fits demonstrate that the apparent reaction order varies from 0.1 under near-diffusion-limit oxygen-depleted conditions to 0.5 under oxygen-enriched conditions. Burnout predictions show good agreement with measurements. Predicted char particle temperatures tend to be low for combustion in oxygen-depleted environments. (c) 2005 The Combustion Institute. Published by Elsevier Inc. All rights reserved. C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA. RP Shaddix, CR (reprint author), Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA. EM crshadd@sandia.gov NR 61 TC 175 Z9 194 U1 8 U2 96 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD MAR PY 2006 VL 144 IS 4 BP 710 EP 729 DI 10.1016/j.combustflame.2005.08.039 PG 20 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA 024JU UT WOS:000236192100006 ER PT J AU Bouhram, M Berthelier, JJ Illiano, JM Johnson, RE Tokar, RL Crary, FJ Young, DT AF Bouhram, M Berthelier, JJ Illiano, JM Johnson, RE Tokar, RL Crary, FJ Young, DT TI The ionospheric halo around Saturn's rings. SO COMPTES RENDUS PHYSIQUE LA French DT Article DE planetary science; plasmas; Saturn; planetary rings; ionosphere ID PLASMA; MAGNETOSPHERE AB During its insertion on an orbit around Saturn, the Cassini orbiter flew above the A and B rings and observations have revealed the presence of an ionosphere composed of O+ and O-2(+) ions. These observations can be explained by the presence around the rings of an atmospheric halo made up of molecular oxygen produced by the photolytic decomposition of the ice which constitutes the grains. At the temperature of the ring particles, oxygen molecules do not stick on the ice and thus are not lost during collisions with grains. A model of the formation of the ionospheric halo is presented based on a test-particle approach to describe the transport and the physical and chemical mechanisms that play an essential role. This model provides a very satisfactory fit with the data. C1 Ctr Etud Environm Terr & Planetaires, F-94100 St Maur des Fosses, France. Univ Virginia, Charlottesville, VA 22904 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. SW Res Inst, San Antonio, TX 78238 USA. RP Bouhram, M (reprint author), Ctr Etud Environm Terr & Planetaires, 4 Ave Neptune, F-94100 St Maur des Fosses, France. EM mehdi.bouhram@cetp.ipsl.fr NR 14 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER PI PARIS PA 23 RUE LINOIS, 75724 PARIS, FRANCE SN 1631-0705 J9 CR PHYS JI C. R. Phys. PD MAR PY 2006 VL 7 IS 2 BP 301 EP 306 DI 10.1016/j.crhy.2006.03.001 PG 6 WC Astronomy & Astrophysics; Physics, Multidisciplinary SC Astronomy & Astrophysics; Physics GA 052PB UT WOS:000238244500019 ER PT J AU Jackson, KA Horoi, M Chaudhuri, I Frauenheim, T Shvartsburg, AA AF Jackson, KA Horoi, M Chaudhuri, I Frauenheim, T Shvartsburg, AA TI Statistical evaluation of the big bang search algorithm SO COMPUTATIONAL MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT 4th International Conference on Theory of Atomic and Molecular Clusters CY APR 24-28, 2004 CL Toulouse, FRANCE SP CNRS, Univ Paul Sabatier, French Minist Educ & Res, Commissariat Energie Atom, Conseil Reg Midi Pyrenees, Mairie Toulouse, Conseil Reg Haute Garonne, Lab Phys Quant DE silicon clusters; energy surfaces; search algorithms ID LENNARD-JONES CLUSTERS; SILICON CLUSTERS; GLOBAL OPTIMIZATION; POTENTIALS; APPROXIMATION; IONIZATION; CHEMISTRY; GEOMETRY; CATIONS AB We probe the statistical performance of the big bang search algorithm, a highly parallel method involving large numbers of gradient quenches from random, but highly compressed initial geometries. Using Lennard-Jones clusters as test systems, we find that the number of energy evaluations required to locate global minima follows an exponential distribution and that the width of the distribution is reduced by starting from compressed geometries. With a volume compression of about 1/100, the efficiency of the method is comparable to that of more sophisticated algorithms for clusters containing up to 40 atoms. We apply the algorithm to the problem of Si clusters, obtaining the ground state structures for Si-n and Si-n(+) for n = 20-27, a range that spans the well-known silicon cluster shape transition. The results provide a detailed accounting of the transition, including a simple explanation of the three structural families observed in this size range. (c) 2005 Elsevier B.V. All rights reserved. C1 Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA. Univ Paderborn, D-33095 Paderborn, Germany. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Jackson, KA (reprint author), Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA. EM jackson@phys.cmich.edu RI Frauenheim, Thomas/C-5653-2015 OI Frauenheim, Thomas/0000-0002-3073-0616 NR 21 TC 9 Z9 9 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-0256 J9 COMP MATER SCI JI Comput. Mater. Sci. PD MAR PY 2006 VL 35 IS 3 BP 232 EP 237 DI 10.1016/j.commatsci.2004.07.014 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA 007KU UT WOS:000234968500017 ER PT J AU Xu, TF Sonnenthal, E Spycher, N Pruess, K AF Xu, TF Sonnenthal, E Spycher, N Pruess, K TI TOUGHREACT - A simulation program for non-isothermal multiphase reactive geochemical transport in variably saturated geologic media: Applications to geothermal injectivity and CO2 geological sequestration SO COMPUTERS & GEOSCIENCES LA English DT Article DE reactive fluid flow; geochemical transport; TOUGHREACT; hydrothermal systems; mineral scaling; clay swelling; injectivity enhancement; CO2 geologic sequestration; mineral trapping; saline aquifer ID SUBSURFACE FLOW SYSTEMS; WATER-ROCK INTERACTION; FLUID-FLOW; POROUS-MEDIA; HYDROTHERMAL SYSTEMS; NUMERICAL-SIMULATION; MODEL DEVELOPMENT; FRACTURED ROCKS; YUCCA MOUNTAIN; DISPOSAL AB TOUGHREACT is a numerical simulation program for chemically reactive non-isothermal flows of multiphase fluids in porous and fractured media. The program was written in Fortran 77 and developed by introducing reactive geochemistry into the multiphase fluid and heat flow simulator TOUGH2. A variety of subsurface thermophysical-chemical processes are considered under a wide range of conditions of pressure, temperature, water saturation, ionic strength, and pH and Eh. Interactions between mineral assemblages and fluids can occur under local equilibrium or kinetic rates. The gas phase can be chemically active. Precipitation and dissolution reactions can change formation porosity and permeability. The program can be applied to many geologic systems and environmental problems, including geothermal systems, diagenetic, and weathering processes, subsurface waste disposal, acid mine drainage remediation, contaminant transport, and groundwater quality. Here we present two examples to illustrate applicability of the program. The first example deals with injectivity effects of mineral scaling in a fractured geothermal reservoir. A major concern in the development of hot dry rock and hot fractured rock reservoirs is achieving and maintaining adequate injectivity, while avoiding the development of preferential short-circuiting flow paths. Rock-fluid interactions and associated mineral dissolution and precipitation effects could have a major impact on the long-term performance of these reservoirs. We used recent European studies as a starting point to explore chemically induced effects of fluid circulation in the geothermal systems. We examine ways in which the chemical composition of reinjected waters can be modified to improve reservoir performance by maintaining or even enhancing injectivity. The second TOUGHREACT application example is related to CO2 geologic sequestration in a saline aquifer. We performed numerical simulations for a commonly encountered Gulf Coast sediment under CO2 injection conditions in order to analyze the impact of CO2 immobilization through carbonate precipitation. Using the data presented in this paper, the CO2 mineral-trapping capability after 10,000 years can reach 60 kg/m(3) of sandstone by secondary carbonate mineral precipitation such as siderite, ankerite, and dawsonite. Most of the simulated mineral alteration pattern is consistent with the field observations of natural CO2 reservoirs. (C) 2005 Elsevier Ltd. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. EM Tianfu_Xu@lbl.gov RI Spycher, Nicolas/E-6899-2010; Sonnenthal, Eric/A-4336-2009 NR 60 TC 238 Z9 267 U1 15 U2 113 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0098-3004 EI 1873-7803 J9 COMPUT GEOSCI-UK JI Comput. Geosci. PD MAR PY 2006 VL 32 IS 2 BP 145 EP 165 DI 10.1016/j.cageo.2005.06.014 PG 21 WC Computer Science, Interdisciplinary Applications; Geosciences, Multidisciplinary SC Computer Science; Geology GA 007TN UT WOS:000234992800001 ER PT J AU List, GF Wood, B Turnquist, MA Nozick, LK Jones, DA Lawton, CR AF List, GF Wood, B Turnquist, MA Nozick, LK Jones, DA Lawton, CR TI Logistics planning under uncertainty for disposition of radioactive wastes SO COMPUTERS & OPERATIONS RESEARCH LA English DT Article ID HAZARDOUS MATERIALS TRANSPORTATION; VEHICLE ALLOCATION; OPTIMIZATION; MODELS AB The US Department of Energy (DOE) faces an enormous environmental remediation challenge involving highly radioactive wastes at former weapons production facilities. The purpose of this analysis is to focus on equipment acquisition and fleet sizing issues related to transportation of wastes from remediation sites to disposal sites. Planning for the transportation of these wastes must be done with recognition of important uncertainties related to overall quantities of waste to be moved, the rate at which the wastes will be prepared for transport, and the certification of suitable transportation containers for use in the effort. However, deadlines for completion of the effort have already been set by the political process, without much regard for these uncertainties. To address this fleet sizing problem, we have created a robust optimization model that focuses on equipment investment decisions. Through this robust optimization, we illustrate how modeling can be used to explore the effects of uncertainty on the equipment acquisition strategy. The disposition of radioactive wastes from DOE sites is an important illustration of a category of problems where equipment investments must be made under conditions of considerable uncertainty. The methodology illustrated in this paper can be applied to this general class of problems. (c) 2004 Elsevier Ltd. All rights reserved. C1 Cornell Univ, Sch Civil & Environm Engn, Ithaca, NY 14853 USA. Rensselaer Polytech Inst, Dept Civil Engn, Troy, NY 12180 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Turnquist, MA (reprint author), Cornell Univ, Sch Civil & Environm Engn, Hollister Hall, Ithaca, NY 14853 USA. EM MAT14@cornell.edu NR 23 TC 9 Z9 11 U1 0 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0305-0548 J9 COMPUT OPER RES JI Comput. Oper. Res. PD MAR PY 2006 VL 33 IS 3 BP 701 EP 723 DI 10.1016/j.cor.2004.07.017 PG 23 WC Computer Science, Interdisciplinary Applications; Engineering, Industrial; Operations Research & Management Science SC Computer Science; Engineering; Operations Research & Management Science GA 970RF UT WOS:000232326600009 ER PT J AU Zhang, ZG Gesmundo, F Hou, PY Niu, Y AF Zhang, ZG Gesmundo, F Hou, PY Niu, Y TI Criteria for the formation of protective Al2O3 scales on Fe-Al and Fe-Cr-Al alloys SO CORROSION SCIENCE LA English DT Article DE FeCrAl; ternary alloys; oxidation; Cr effect ID IRON-ALUMINUM-ALLOYS; HIGH-TEMPERATURE OXIDATION; HIGH OXIDANT PRESSURES; Y ALLOYS; INTERNAL OXIDATION; GROWTH MECHANISMS; EXTERNAL OXIDATION; SELF-DIFFUSION; BASE ALLOYS; GAMMA-IRON AB The conditions for the formation of external alumina scales on binary Fe-Al alloys and the nature of the third-element effect due to chromium additions have been investigated by studying the oxidation at 1000 degrees C in 1 atm O-2 of a binary Fe-10 at.% Al alloy (Fe-10Al) and of two ternary Fe-Cr-10 at.% Al alloys containing 5 and 10 at.% chromium (Fe-5Cr-10Al and Fe-10Cr-10Al, respectively). An Al-rich scale developed initially on Fe-10Al was subsequently replaced by a multi-layered scale containing mixtures of Fe and Al oxides plus a large number of Fe-rich oxide nodules: internal aluminum oxidation was essentially absent from this alloy. Addition of 5 at.% chromium to Fe-10Al did not suppress the formation or nodules, but they were eventually healed by the growth of all alumina layer at their base, resulting in a significant reduction of the oxidation rate. Finally, the alloy with 10 at.% Cr formed continuous external alumina scales without any Fe-rich nodule. Thus, the addition of sufficient amounts of chromium to Fe-10Al produces a third-element effect as expected. However, the process found in this alloy system does not involve a prevention of the internal oxidation of Al. Instead, it shows a transition from the growth of mixed Fe- and Al-rich external scales directly to all external Al2O3 scale formation. An interpretation of this kind of mechanism involving a third-element is presented along with a prediction of the critical Al contents required to produce the various possible scaling modes on binary Fe-Al alloys. (C) 2005 Elsevier Ltd. All rights reserved. C1 Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China. Univ Genoa, DICheP, I-16129 Genoa, Italy. Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Niu, Y (reprint author), Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Wencui Rd 62, Shenyang 110016, Peoples R China. EM yniu@imr.ac.cn NR 49 TC 92 Z9 95 U1 5 U2 28 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0010-938X J9 CORROS SCI JI Corrosion Sci. PD MAR PY 2006 VL 48 IS 3 BP 741 EP 765 DI 10.1016/j.corsci.2005.01.012 PG 25 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 023OR UT WOS:000236136600016 ER PT J AU Kim, H Perelson, AS AF Kim, Hwijin Perelson, Alan S. TI Dynamic characteristics of HIV-1 reservoirs SO CURRENT OPINION IN HIV AND AIDS LA English DT Article DE HIV dynamics; intermittent viremia (blips); latent reservoir; mathematical modeling AB Purpose of review To examine kinetic issues related to the stability of the latent reservoir and the observation of low levels of viremia (< 50 copies/ml) in patients treated with highly active antiretroviral therapy. Recent findings Once HIV-1 RNA becomes undetectable it is difficult to deduce the events occurring in HIV-infected individuals. Analyses of viral blips and genetic changes in HIV-1 DNA have, however, provided insights into ongoing viral replication and the stability of the latent reservoir. Summary Under potent therapy, HIV-1 RNA decays in two phases and then becomes undetectable by clinical assay. Three possible scenarios are explored: the viral load stabilizes at a new steady state, or viral clearance remains more rapid than viral production and viral load declines either in a third exponential phase that might reflect the half-life of the latent reservoir, or in a decelerating manner reflecting heterogeneities in the cell populations making up the latent reservoir. A simple model shows that depending on the viral burst size it may be possible to sustain a low approximately steady level of viremia, say 10 copies/ml, for years without seriously depleting the latent reservoir. C1 [Kim, Hwijin; Perelson, Alan S.] 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 FU US Department of Energy [W-7405-ENG-36]; National Institutes of Health [AI28433, RR06555] FX Sponsorship: This work was performed under the auspices of the US Department of Energy under contract W-7405-ENG-36, and supported by National Institutes of Health grants AI28433 and RR06555. NR 49 TC 7 Z9 7 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 1746-630X J9 CURR OPIN HIV AIDS JI Curr. Opin. HIV AIDS PD MAR PY 2006 VL 1 IS 2 BP 152 EP 156 DI 10.1097/01.COH.0000203836.08974.96 PG 5 WC Immunology; Infectious Diseases SC Immunology; Infectious Diseases GA V24NM UT WOS:000208417100010 PM 19372800 ER PT J AU Heun, P Erhardt, S Blower, MD Weiss, S Skora, AD Karpen, GH AF Heun, P Erhardt, S Blower, MD Weiss, S Skora, AD Karpen, GH TI Mislocalization of the Drosophila centromere-specific histone CID promotes formation of functional ectopic kinetochores SO DEVELOPMENTAL CELL LA English DT Article ID H3 VARIANT; TOPOISOMERASE-II; CENP-A; PROTEIN; CHROMOSOME; CHROMATIN; LOCALIZATION; CHECKPOINT; NEOCENTROMERE; MELANOGASTER AB The centromere-specific histone variant CENP-A (CID in Drosophila) is a structural and functional foundation for kinetochore formation and chromosome segregation. Here, we show that overexpressed CID is mislocalized into normally noncentromeric regions in Drosophila tissue culture cells and animals. Analysis of mitoses in living and fixed cells reveals that mitotic delays, anaphase bridges, chromosome fragmentation, and cell and organismal lethality are all direct consequences of CID mislocalization. In addition, proteins that are normally restricted to endogenous kinetochores assemble at a subset of ectopic CID incorporation regions. The presence of microtubule motors and binding proteins, spindle attachments, and aberrant chromosome morphologies demonstrate that these ectopic kinetochores are functional. We conclude that CID mislocalization promotes formation of ectopic centromeres and multicentric chromosomes, which causes chromosome missegregation, aneuploidy, and growth defects. Thus, CENP-A mislocalization is one possible mechanism for genome instability during cancer progression, as well as centromere plasticity during evolution. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genome Biol, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA. Johns Hopkins Univ, Dept Biol, Baltimore, MD 21208 USA. RP Karpen, GH (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genome Biol, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM karpen@fruitfly.org RI Heun, Patrick/F-3883-2011 FU NIGMS NIH HHS [R01 GM066272, R01 GM066272-04, R01 GM66272]; Wellcome Trust [072016] NR 47 TC 184 Z9 194 U1 0 U2 8 PU CELL PRESS PI CAMBRIDGE PA 1100 MASSACHUSETTS AVE, CAMBRIDGE, MA 02138 USA SN 1534-5807 J9 DEV CELL JI Dev. Cell PD MAR PY 2006 VL 10 IS 3 BP 303 EP 315 DI 10.1016/j.devcel.2006.01.014 PG 13 WC Cell Biology; Developmental Biology SC Cell Biology; Developmental Biology GA 025HH UT WOS:000236255500008 PM 16516834 ER PT J AU Triesch, J Teuscher, C Deak, GO Carlson, E AF Triesch, J Teuscher, C Deak, GO Carlson, E TI Gaze following: why (not) learn it? SO DEVELOPMENTAL SCIENCE LA English DT Review ID JOINT VISUAL-ATTENTION; WILLIAMS-SYNDROME; EYE-MOVEMENTS; EARLY INFANCY; AUTISM; CHILDREN; DIRECTION; FACE; LANGUAGE; RECOGNITION AB We propose a computational model of the emergence of gaze following skills in infant-caregiver interactions. The model is based oil the idea that infants learn that monitoring their caregivers direction of gaze allows their to predict the locations of interesting objects or events in their environment (Moore & Corkinn, 1994). Elaborating on this theory, we demonstrate that a specific Basic Set of structures and mechanisms is sufficient for gaze following to emerge. This Basic Set includes the infant's perceptual skills and preferences, habituation and reward-driven learning, and a structured social environment featuring a caregiver who tends to look at things the infant will find interesting. We review evidence that all elements of the Basic Set are established well before the relerant gaze following skills emerge. We evaluate the model in a series of simulations and show that it can account for typical development. We also demonstrate that plausible alterations of model paraineters, motivated by,findings oil two different developmental disorders-autism and Williams syndrome-produce delays or deficits in the emergence of gaze following. The model makes a number of testable predictions. In addition, it opens a new perspective for theorizing about cross-species differences in gaze following. C1 Univ Calif San Diego, Dept Cognit Sci, La Jolla, CA 92093 USA. Univ Frankfurt, Inst Adv Studies, D-6000 Frankfurt, Germany. Los Alamos Natl Lab, Los Alamos, NM USA. RP Triesch, J (reprint author), Univ Calif San Diego, Dept Cognit Sci, 9500 Gilman Dr, La Jolla, CA 92093 USA. EM triesch@cogsci.ucsd.edu NR 121 TC 98 Z9 100 U1 3 U2 26 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 1363-755X J9 DEVELOPMENTAL SCI JI Dev. Sci. PD MAR PY 2006 VL 9 IS 2 BP 125 EP 147 DI 10.1111/j.1467-7687.2006.00470.x PG 23 WC Psychology, Developmental; Psychology, Experimental SC Psychology GA 021WK UT WOS:000236016400003 PM 16472311 ER PT J AU Triesch, O Teuscher, C Deak, GO AF Triesch, O Teuscher, C Deak, GO TI Gaze following: how (not) to derive predictions from a computational model SO DEVELOPMENTAL SCIENCE LA English DT Editorial Material ID ATTENTION C1 Univ Calif San Diego, Dept Cognit Sci, La Jolla, CA 92093 USA. Univ Frankfurt, Inst Adv Studies, D-6000 Frankfurt, Germany. Los Alamos Natl Lab, Los Alamos, NM USA. RP Triesch, O (reprint author), Univ Calif San Diego, Dept Cognit Sci, 9500 Gilman Dr, La Jolla, CA 92093 USA. EM triesch@cogsci.ucsd.edu NR 7 TC 0 Z9 0 U1 0 U2 2 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 1363-755X J9 DEVELOPMENTAL SCI JI Dev. Sci. PD MAR PY 2006 VL 9 IS 2 BP 156 EP 157 PG 2 WC Psychology, Developmental; Psychology, Experimental SC Psychology GA 021WK UT WOS:000236016400007 ER PT J AU Balas, E Carr, R Fischetti, M Simonetti, N AF Balas, Egon Carr, Robert Fischetti, Matteo Simonetti, Neil TI New facets of the STS polytope generated from known facets of the ATS polytope SO DISCRETE OPTIMIZATION LA English DT Article DE symmetric traveling salesman problem; asymmetric traveling salesman problem; lifting; inequalities; facets; CAT inequalities; curtain inequalities; cloning ID TRAVELING SALESMAN POLYTOPE AB While it had been known for a long time how to transform an asymmetric traveling salesman (ATS) problem on the complete graph with n vertices into a symmetric traveling salesman (STS) problem on ail incomplete graph with 2n vertices, no method was available for using this correspondence to derive facets of the symmetric polytope from facets of the asymmetric polytope until the work of E. Balas and M. Fischetti in [Lifted cycle inequalities for the asymmetric traveling salesman problem, Mathematics of Operations Research 24 (2) (1999) 273-292] suggested an approach. The original Balas-Fischetti method uses a standard sequential lifting procedure for the computation of the coefficient of the edges that are missing in the incomplete STS graph, which is a difficult task when addressing classes of (as opposed to single) inequalities. In this paper we introduce a systematic procedure for accomplishing the lifting task. The procedure exploits the structure of the tight STS tours and organizes them into a Suitable tree structure. The potential of the method is illustrated by deriving large new classes of facet-defining STS inequalities. (c) 2005 Elsevier B.V. All rights reserved. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Univ Padua, DEI, I-35100 Padua, Italy. Bryn Athyn Coll New Church, Bryn Athyn, PA 19009 USA. RP Carr, R (reprint author), Sandia Natl Labs, POB 5800,MS1110, Albuquerque, NM 87185 USA. EM rdcarr@sandia.gov NR 9 TC 2 Z9 2 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1572-5286 J9 DISCRETE OPTIM JI Discret. Optim. PD MAR PY 2006 VL 3 IS 1 BP 3 EP 19 DI 10.1016/j.disopt.2005.10.001 PG 17 WC Operations Research & Management Science; Mathematics, Applied SC Operations Research & Management Science; Mathematics GA 117EI UT WOS:000242855100002 ER PT J AU Forst, CV AF Forst, CV TI Host-pathogen systems biology SO DRUG DISCOVERY TODAY LA English DT Review ID POWER-LAW APPROXIMATION; T-CELL RECEPTORS; METABOLIC PATHWAYS; DRUG DISCOVERY; MYCOBACTERIUM-TUBERCULOSIS; MODELS; ORGANIZATION; SIMULATION; ALIGNMENT; NETWORKS AB Unlike traditional biological research that focuses on a small set of components, systems biology studies the complex interactions between a large number of genes, proteins and other elements of biological networks and systems. Host-pathogen systems biology examines the interactions between the components of two distinct organisms, either a microbial or viral pathogen and its animal host or two different microbial species in a community. With the availability of complete genomic sequences of various hosts and pathogens, together with breakthroughs in proteomics, metabolomics and other experimental areas, the investigation of host-pathogen systems on a multitude of levels of detail has come within reach. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Forst, CV (reprint author), Los Alamos Natl Lab, Biosci Div, Mailstop M888,POB 1663, Los Alamos, NM 87545 USA. EM chris@lanl.gov NR 56 TC 54 Z9 55 U1 0 U2 3 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 1359-6446 J9 DRUG DISCOV TODAY JI Drug Discov. Today PD MAR PY 2006 VL 11 IS 5-6 BP 220 EP 227 AR PII S1359-6446(05)03735-9 DI 10.1016/S1359-6446(05)03735-9 PG 8 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA 024AN UT WOS:000236167400006 PM 16580599 ER PT J AU Xiong, Y Wood, S Kruszewski, J AF Xiong, Yongliang Wood, Scott Kruszewski, Jason TI Hydrothermal transport and deposition of rhenium under subcritical conditions revisited SO ECONOMIC GEOLOGY LA English DT Article ID PHOTOELECTRON-SPECTROSCOPY; POLYCRYSTALLINE RHENIUM; XPS; OXIDATION; CATALYSTS; O-2; GAMMA-AL2O3; SOLUBILITY; ADSORPTION; OXIDES AB Data on the solubility of Re metal in subcritical hydrothermal solutions presented in Xiong and Wood (2001) have been reinterpreted assuming that the following reaction controlled dissolved Re concentrations: ReO2(s) + 2H(2)O(l) <-> Re(OH)(4(aq)). The formation of ReO2(s) on the surface of Re metal at the conditions of the previous experiments was demonstrated conclusively in a new experiment using X-ray photoelectron spectroscopy (XPS). The temperature dependence (200 degrees-25 degrees C) of the equilibrium constant for the above reaction at infinite dilution can be expressed as log K = - 4700 +/- 760 + 6.2 +/- 2.0(2 sigma). These new equilibrium constants predict that metallic rhenium, ReO2(s), and ReS2(s) have much lower solubilities than those implied in Xiong and Wood (2001). Based upon the new equilibrium constants, the free energy of formation, the enthalpy of formation, and entropy at the reference state (298.15 K and 1 bar) for the neutral rhenium species, Re(OH)(4(aq)) (also alternatively formulated as ReO(OH)(2(aq))), are derived in this study. Based on derived equilibrium constants at 25 degrees C for dissolution of ReS2(s) as Re(OH)(4(aq)), we predict that rhenium can be enriched in the reduced zone in supergene environments in porphyry copper-molybdenum deposits. C1 Univ Idaho, Dept Geol Sci, Moscow, ID 83844 USA. Sandia Natl Labs, Carlsbad, NM 88220 USA. RP Wood, S (reprint author), Univ Idaho, Dept Geol Sci, Box 443022, Moscow, ID 83844 USA. EM swood@uidaho.edu NR 27 TC 16 Z9 19 U1 3 U2 14 PU SOC ECONOMIC GEOLOGISTS, INC PI LITTLETON PA 7811 SCHAFFER PARKWAY, LITTLETON, CO 80127 USA SN 0361-0128 J9 ECON GEOL JI Econ. Geol. PD MAR-APR PY 2006 VL 101 IS 2 BP 471 EP 478 DI 10.2113/gsecongeo.101.2.471 PG 8 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 064CV UT WOS:000239067700010 ER PT J AU Miracle, A Ankley, G Lattier, D AF Miracle, A Ankley, G Lattier, D TI Expression of two vitellogenin genes (vg1 and vg3) in fathead minnow (Pimephales promelas) liver in response to exposure to steroidal estrogens and androgens SO ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY LA English DT Article DE vitellogenin; fathead minnow; real-time PCR; estrogen; androgen ID DEDUCED PRIMARY-STRUCTURE; LIFE-CYCLE; SEQUENCE; 17-BETA-ESTRADIOL; TRANSCRIPTION; PURIFICATION; ESTRADIOL; EVOLUTION; CHEMICALS; PROTEIN AB In this study, we describe the sequence for the fathead minnow (Pimephalts promelas) vitellogenin 3 gene (vg3) and compare the responses of vg1 and vg3 following exposure to steroidal estrogens and androgens. The fathead minnow vg3 sequence is:the second nucleotide sequence described in teleosts, following the original description of this isoform in zebrafish (Danio rerio). Following a brief water exposure (24 h) to 2, 5, and 10 ng/L 17 alpha-ethynylestradiol (EE2), both vg1 and vg3 were upregulated in male liver. However, levels of vg3 induction were four orders of magnitude lower than levels of induction of vy1. Suppression of vg in female liver following exposure to 50 or 500 ng/L of the synthetic androgen 17 beta-trenbolone occurs at similar magnitude for both vg1 and vg3 isoforms. The results of this study Support the use of vg1 as an indicator of estrogenic exposure in male fish and indicate the potential for vg1 and/or vg3 for use as indicators of androgenic exposure. Published by Elsevier Inc. C1 US EPA, Ecol Exposure Res Div, Cincinnati, OH 45268 USA. US EPA, Environm Res Lab, Mid Continent Ecol Div, Duluth, MN 55804 USA. RP Miracle, A (reprint author), Pacific NW Natl Lab, Environm Technol Directorate, Nat Resource Div, Richland, WA 99352 USA. EM ann.miracle@pnl.gov NR 31 TC 49 Z9 53 U1 3 U2 13 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0147-6513 J9 ECOTOX ENVIRON SAFE JI Ecotox. Environ. Safe. PD MAR PY 2006 VL 63 IS 3 BP 337 EP 342 DI 10.1016/j.ecoenv.2005.12.002 PG 6 WC Environmental Sciences; Toxicology SC Environmental Sciences & Ecology; Toxicology GA 026ZQ UT WOS:000236382600001 PM 16464498 ER PT J AU Amine, K Wang, QZ Vissers, DR Zhang, ZC Rossi, NAA West, R AF Amine, K Wang, QZ Vissers, DR Zhang, ZC Rossi, NAA West, R TI Novel silane compounds as electrolyte solvents for Li-ion batteries SO ELECTROCHEMISTRY COMMUNICATIONS LA English DT Article DE silane; electrolyte solvent; lithium ion battery; calendar and cycle life ID POLYMER ELECTROLYTE; COMB POLYMERS; LITHIUM PERCHLORATE; SULFONATE GROUPS; SIDE-CHAINS; SILOXANE; CONDUCTIVITY; OLIGO(OXYETHYLENE); COMPLEXES AB Novel silane compounds such as {2-[2-(2-methoxyethoxy)ethoxy]ethoxy} trimethylsilane (1),bis{2-[2-(2-methoxyethoxy)ethoxy]ethoxyldimethylsilane (2), {3-[2-(2-(2-methoxyethoxy)ethoxy)ethoxy]-propylltrimethylsilane (3) and 1[2-(2-(2-methoxyethoxy)ethoxy)ethoxy]-methyl) trimethylsilane (4) have been synthesized and used as non-aqueous electrolyte solvents in lithium-ion batteries. These silane molecules can easily dissolve most lithium salts including lithium bis(oxalato)borate (LiBOB), LiPF6, LiBF4, and lithium trifluoromethylsulfonimide. The LiBOB salt was found to be very appropriate for these silane molecules because, unlike LiPF6, LiBOB can provide a good passivation film on a graphite anode. Cyclic voltammetry analyses show that silane-based electrolytes with a 0.8 M LiBOB salt concentration are stable to 4.4 V; they also exhibit very high lithium-ion conductivities up to 1.29 x 10(-3) S/cm at room temperature. Full cell performance tests with LiNi0.08Co0.15Al0.05O2 as the positive electrode and MCMB graphite as the negative electrode have shown excellent cyclability both at room temperature and at 40 degrees C. Cells with these new silane electrolytes exhibit long calendar life; they show no impedance rise after aging at 80% state of charge and 55 degrees C for one year. The results suggest that silane-based electrolytes have great potential for use in lithium-ion batteries. (c) 2006 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Div Chem Engn, Electrochem Technol Program, Argonne, IL 60439 USA. Univ Wisconsin, Organosilicon Res Ctr, Dept Chem, Madison, WI 53706 USA. RP Amine, K (reprint author), Argonne Natl Lab, Div Chem Engn, Electrochem Technol Program, Argonne, IL 60439 USA. EM amine@cmt.anl.gov RI Amine, Khalil/K-9344-2013 NR 16 TC 37 Z9 41 U1 5 U2 41 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 MAR PY 2006 VL 8 IS 3 BP 429 EP 433 DI 10.1016/j.elecom.2005.12.017 PG 5 WC Electrochemistry SC Electrochemistry GA 022JP UT WOS:000236052000011 ER PT J AU Grubor, NM Armstrong, DW Jankowiak, R AF Grubor, NM Armstrong, DW Jankowiak, R TI Flow-through partial-filling affinity capillary electrophoresis using a crossreactive antibody for enantiomeric separations SO ELECTROPHORESIS LA English DT Article DE affinity capillary electrophoresis; benzo[a]pyrene tetrols; chiral separations; crossreactive antibodies; enantiomers ID DIVERSITY; PROTEINS AB It is demonstrated that the separation of diastereoisomers; and enantiomers can be accomplished by the flow-through partial-filling affinity CE using a crossreactive mAb. This approach revealed differences in the binding strength of the (+/-)-cis- and (+/-)-trans-benzo[a]pyrene tetrols with the anti-polycyclic aromatic hydrocarbon mAb and demonstrated that (+)-enantiomers are more strongly immunocomplexed than their (-)-counterparts. It is proposed that crossreactive monoclonal antibodies (i.e. mAb raised against achiral molecule and possessing limited selectivity) could be effectively utilized for specific stereoisomeric differentiation and chiral separations. C1 Kansas State Univ, Dept Chem, Manhattan, KS 66502 USA. Kansas State Univ, Terry C Johnson Ctr Basic Canc Res, Manhattan, KS 66502 USA. Iowa State Univ, US DOE, Dept Chem, Ames Lab, Ames, IA USA. Univ Texas Arlington, Dept Chem & Biochem, Arlington, TX USA. RP Jankowiak, R (reprint author), Kansas State Univ, Dept Chem, Manhattan, KS 66502 USA. EM ryszard@ksu.edu FU NCI NIH HHS [2PO1 CA 49210-12]; NIGMS NIH HHS [R01 GM53825-08] NR 16 TC 8 Z9 8 U1 0 U2 4 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0173-0835 J9 ELECTROPHORESIS JI Electrophoresis PD MAR PY 2006 VL 27 IS 5-6 BP 1078 EP 1083 DI 10.1002/elps.200500660 PG 6 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 028TO UT WOS:000236511900017 PM 16523453 ER PT J AU Gabitto, J Tsouris, C AF Gabitto, J Tsouris, C TI Dissolution mechanisms of CO2 hydrate droplets in deep seawaters SO ENERGY CONVERSION AND MANAGEMENT LA English DT Article DE CO2 hydrate; mass transfer; ocean carbon sequestration; hydrate dissolution ID CLATHRATE-HYDRATE; LIQUID CO2; WATER; FILMS; INTERFACE; OCEAN; TRANSPORT; MODEL AB Carbon dioxide dissolution at intermediate ocean depths was studied using physical and mass transfer models. Particle density and hydrate layer thickness were determined using existing field data. Pseudo-homogeneous and heterogeneous mass transfer models were proposed to study the dissolution process. Pseudo-homogeneous models do not seem to represent the dissolution process well. Although heterogeneous models interpret the physical behavior better, unresolved issues related to hydrate dissolution still remain. For example, solid hydrate forms on one side of the hydrate film while it dissolves on the other. Dissolution is a complex process that comprises at least two sequential steps. The global process is controlled by mass transfer inside the hydrate layer or by a dissolution reaction at the hydrate-water interface. (c) 2005 Elsevier Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Dept Serparat & Mat, Oak Ridge, TN 37831 USA. Prairie View A&M Univ, Dept Chem Engn, Prairie View, TX 77446 USA. RP Tsouris, C (reprint author), Oak Ridge Natl Lab, Dept Serparat & Mat, POB 2008, Oak Ridge, TN 37831 USA. EM tsourisc@ornl.gov RI Tsouris, Costas/C-2544-2016 OI Tsouris, Costas/0000-0002-0522-1027 NR 20 TC 12 Z9 21 U1 1 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0196-8904 J9 ENERG CONVERS MANAGE JI Energy Conv. Manag. PD MAR PY 2006 VL 47 IS 5 BP 494 EP 508 DI 10.1016/j.enconman.2005.05.016 PG 15 WC Thermodynamics; Energy & Fuels; Mechanics SC Thermodynamics; Energy & Fuels; Mechanics GA 004BC UT WOS:000234726000002 ER PT J AU Czernik, S French, RJ AF Czernik, S French, RJ TI Production of hydrogen from plastics by pyrolysis and catalytic steam reform SO ENERGY & FUELS LA English DT Article ID THERMAL-DEGRADATION; WASTES AB Thermal decomposition of the most common plastics such as polyethylene and polypropylene produces a mixture of many different hydrocarbons that can be used as a feedstock for producing hydrogen. The proposed process includes two steps: pyrolysis of plastics and catalytic steam reforming of pyrolysis gases and vapors. This research provides a proof of concept supported by experiments on selected polymers performed using a microscale reactor system interfaced with a molecular beam mass spectrometer and demonstrates process performance using a two-reactor bench-scale system. From 60 g/h polypropylene fed to the system 20.5 g/h hydrogen was produced, which corresponds to 80% of the theoretical potential. C1 Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO 80401 USA. RP Czernik, S (reprint author), Natl Renewable Energy Lab, Natl Bioenergy Ctr, 1617 Cole Blvd, Golden, CO 80401 USA. EM Stefan_Czernik@nrel.gov NR 13 TC 33 Z9 33 U1 0 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD MAR-APR PY 2006 VL 20 IS 2 BP 754 EP 758 DI 10.1021/ef050354h PG 5 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA 024BA UT WOS:000236168700044 ER PT J AU Zhao, HB Kwak, JH Wang, Y Franz, JA White, JM Holladay, JE AF Zhao, HB Kwak, JH Wang, Y Franz, JA White, JM Holladay, JE TI Effects of crystallinity on dilute acid hydrolysis of cellulose by cellulose ball-milling study SO ENERGY & FUELS LA English DT Article ID NEUTRON FIBER DIFFRACTION; HYDROGEN-BONDING SYSTEM; SYNCHROTRON X-RAY; STATE C-13 NMR; NATIVE CELLULOSE; BOUND WATER AB The dilute acid (0.05 M H2SO4) hydrolysis at 175 degrees C of samples comprised of varying fractions of crystalline (alpha-form) and amorphous cellulose was studied. The amorphous content, based on XRD and CP/MAS NMR, and the product (glucose) yield, based on HPLC, increased by as much as a factor of 3 upon ball milling. These results are interpreted in terms of a model involving mechanical disruption of crystallinity by breaking hydrogen bonds in alpha-cellulose, opening up the structure, and making more beta-1,4 glycosidic bonds readily accessible to the dilute acid. However, in parallel with hydrolysis to form liquid-phase products, there are reactions of amorphous cellulose that form solid degradation products. C1 Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA. RP Holladay, JE (reprint author), Pacific NW Natl Lab, Inst Interfacial Catalysis, POB 999, Richland, WA 99352 USA. EM john.holladay@pnl.gov RI Wang, Yong/C-2344-2013; Kwak, Ja Hun/J-4894-2014 NR 28 TC 139 Z9 147 U1 4 U2 79 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD MAR-APR PY 2006 VL 20 IS 2 BP 807 EP 811 DI 10.1021/ef050319a PG 5 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA 024BA UT WOS:000236168700052 ER PT J AU Greene, DL Hopson, JL Li, J AF Greene, DL Hopson, JL Li, J TI Have we run out of oil yet? Oil peaking analysis from an optimist's perspective SO ENERGY POLICY LA English DT Article; Proceedings Paper CT 30th Seminar of Energy Policy CY MAR 23-25, 2004 CL Hong Kong Baptist Univ, Hong Kong Energy Studies Ctr, Hong Kong, PEOPLES R CHINA HO Hong Kong Baptist Univ, Hong Kong Energy Studies Ctr DE oil depletion; oil peaking; energy transition ID GAS DEPLETION; GLOBAL OIL; RESOURCES AB This Study addresses several questions concerning the peaking of conventional oil production from an optimist's perspective. Is the oil peak imminent? What is the range of uncertainty? What are the key determining factors'? Will a transition to unconventional oil undermine or strengthen OPEC's influence over world oil markets? These issues are explored using a model combining alternative world energy scenarios with an accounting of resource depletion and a market-based simulation of transition to unconventional oil resources. No political or environmental constraints are allowed to hinder oil production, geological constraints on the rates at which oil can be produced are not represented, and when USGS resource estimates are used, more than the mean estimate of ultimately recoverable resources is assumed to exist. The issue is framed not as a question of "running out" of conventional oil, but in terms of the timing and rate of transition from conventional to unconventional oil resources. Unconventional oil is chosen because production from Venezuela's heavy-oil fields and Canada's Athabascan oil sands is already underway on a significant scale and unconventional oil is most consistent with the existing infrastructure for producing, refining, distributing and Consuming petroleum. However, natural gas or even coal might also prove to be economical sources of liquid hydrocarbon fuels. These results indicate a high probability that production of conventional oil from outside of the Middle East region will peak, or that the rate of increase of production will become highly constrained before 2025. If world consumption of hydrocarbon fuels is to continue growing, massive development Of unconventional resources will be required. While there are grounds for pessimism and optimism, it is certainly not too soon for extensive, detailed analysis of transitions to alternative energy Sources. Published by Elsevier Ltd. C1 Univ Tennessee, Oak Ridge Natl Lab, Natl Transportat Res Ctr, Knoxville, TN 37932 USA. RP Greene, DL (reprint author), Univ Tennessee, Oak Ridge Natl Lab, Natl Transportat Res Ctr, 2360 Cherahala Blvd, Knoxville, TN 37932 USA. EM dlgreene@ornl.gov; hopsonjl@ornl.gov; lij1@ornl.gov NR 40 TC 85 Z9 87 U1 6 U2 63 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0301-4215 J9 ENERG POLICY JI Energy Policy PD MAR PY 2006 VL 34 IS 5 BP 515 EP 531 DI 10.1016/j.enpol.2005.11.025 PG 17 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA 009SP UT WOS:000235133300006 ER PT J AU Knize, MG Hatch, FT Tanga, MJ Lau, EY Colvin, ME AF Knize, MG Hatch, FT Tanga, MJ Lau, EY Colvin, ME TI A QSAR for the mutagenic potencies of twelve 2-amino-trimethylimidazopyridine isomers: Structural, quantum chemical, and hydropathic factors SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Article DE QSAR; TMIP; heterocyclic amine; cooking mutagen ID AMINE FOOD MUTAGENS; QUANTITATIVE STRUCTURE; HETEROCYCLIC AMINES; AROMATIC-AMINES; NITRENIUM IONS; SALMONELLA-TYPHIMURIUM; RELATIVE STABILITIES; MODEL SYSTEMS; SOFT ACIDS; CARCINOGENS AB An isomeric series of heterocyclic amines related to one found in heated muscle meats was investigated for properties that predict their measured mutagenic potency. Eleven of the 12 possible 2-amino-trimethylimiclazopyridine (TMIP) isomers were tested for mutagenic potency in the Ames/Salmonella test with bacterial strain TA98, and resulted in a 600-fold range in potency. Structural, quantum chemical, and hydropathic data were calculated on the parent molecules and the corresponding nitrenium ions of all of the tested isomers to establish models for predicting the potency of the unknown isomer. The principal determinants of higher mutagenic potency in these amines are: (1) a small dipole moment, (2) the combination of b-face ring fusion and N3-methyl group, (3) a lower calculated energy of the pi electron system, (4) a smaller energy gap between the amine HOMO and LUMO orbitals (Pearson "softness"), and (5) a more stable nitrenium ion. Based on predicted potency from the average of six regression models, the isomer not yet synthesized and tested is expected to have a mutagenic potency of 0.77 revertants/mu g in tester strain TA98, which is near the low end of the potency range of the isomers. C1 Lawrence Livermore Natl Lab, Biosci Directorate, Livermore, CA 94550 USA. SRI Int, Biosci Div, Menlo Pk, CA 94025 USA. Univ Calif Merced, Sch Nat Sci, Merced, CA USA. RP Knize, MG (reprint author), Lawrence Livermore Natl Lab, Biosci Directorate, 7000 East Ave, Livermore, CA 94550 USA. EM knize1@llnl.gov FU NCI NIH HHS [CA55861] NR 52 TC 17 Z9 17 U1 0 U2 6 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD MAR PY 2006 VL 47 IS 2 BP 132 EP 146 DI 10.1002/em.20177 PG 15 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 012OL UT WOS:000235348400007 PM 16258923 ER PT J AU Guzman, KAD Taylor, MR Banfield, JF AF Guzman, KAD Taylor, MR Banfield, JF TI Environmental risks of nanotechnology: National nanotechnology initiative funding, 2000-2004 SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID WATER-SOLUBLE FULLERENE; WALL CARBON NANOTUBES; TITANIUM-DIOXIDE PARTICLES; SEMICONDUCTOR QUANTUM DOTS; RAT-LIVER MICROSOMES; ULTRAFINE PARTICLES; PULMONARY TOXICITY; PHYSICOCHEMICAL PROPERTIES; PHOTOINDUCED CYTOTOXICITY; POROUS-MEDIA AB By considering risk in the early stages of a technology, costs of identifying important health and environmental impacts after a technology has widely diffused can be avoided. Nanotechnology, involving materials and objects less than 100 nm in size, is an important case in point. In this paper we analyze the research priorities discussed by various interest groups concerned with the environmental risks of nanotechnology, evaluate the distribution of federal environmental nanotechnology R&D funding, and discuss research in this field. Overall federal environmental R&D funding to date is limited and focuses more on the positive environmental applications of nanotechnology than on basic knowledge/research, tools for nanoenvironmental research, or the potential risks of nanotechnology. The situation began to change in 2004 when a significant increase occurred in federal R&D funding for the environmental implications of engineered nanomaterials. Though literature exits on the exposure, transport, and toxicity of incidental nanoparticles, little work has been published on the environmental risks of engineered nanoparticles. C1 Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Div Earth Sci, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Goldman Sch Publ Policy, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA. RP Guzman, KAD (reprint author), Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. EM kadunphy@berkeley.edu NR 82 TC 157 Z9 161 U1 5 U2 64 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD MAR 1 PY 2006 VL 40 IS 5 BP 1401 EP 1407 DI 10.1021/es0515708 PG 7 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 018WS UT WOS:000235796100011 PM 16568748 ER PT J AU Dynes, JJ Tyliszczak, T Araki, T Lawrence, JR Swerhone, GDW Leppard, GG Hitchcock, AP AF Dynes, JJ Tyliszczak, T Araki, T Lawrence, JR Swerhone, GDW Leppard, GG Hitchcock, AP TI Speciation and quantitative mapping of metal species in microbial biofilms using scanning transmission X-ray microscopy SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID ADVANCED LIGHT-SOURCE; ACTIVATED-SLUDGE; ELECTRON-MICROSCOPY; ABSORPTION; IRON; MANGANESE; SPECTROMICROSCOPY; REMOVAL; SPECTROSCOPY; RESOLUTION AB A scanning transmission X-ray microscope illuminated with synchrotron light was used to investigate the speciation and spatial distributions of metals in a microbial biofilm cultivated from river water. Metal 2p absorption edge signals were used to provide metal speciation (through shapes of the absorption spectra) and quantitative spatial distributions of the metal species. This paper presents sample data and describes methods for extracting quantitative maps of metal species from image sequences recorded in the region of the metal 2p edges. Comparisons were made with biochemical characterization of the same region using images recorded at the C 1s and 0 1s edges. The method is applied to detailed quantitative analysis of ferrous and ferric iron in a river biofilm, in concert with mapping Ni-(II) and Mn(II) species in the same region. The distributions of the metal species are discussed in the context of the biofilm structure. These results demonstrate that soft X-ray STXM measurements at the metal 2p absorption edges can be used to speciate metals and to provide quantitative spatial distribution maps for metal species in environmental samples with 50 nm spatial resolution. C1 McMaster Univ, Brockhouse Inst Mat Res, Hamilton, ON L8S 4M1, Canada. Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA. Natl Water Res Inst Branch, Saskatoon, SK S7N 3H5, Canada. Natl Water Res Inst Branch, Burlington, ON L7R 4A6, Canada. RP Hitchcock, AP (reprint author), McMaster Univ, Brockhouse Inst Mat Res, Hamilton, ON L8S 4M1, Canada. EM aph@mcmaster.ca RI Lawrence, John/D-5758-2011 OI Lawrence, John/0000-0001-5872-1212 NR 52 TC 90 Z9 91 U1 3 U2 49 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD MAR 1 PY 2006 VL 40 IS 5 BP 1556 EP 1565 DI 10.1021/es0513638 PG 10 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 018WS UT WOS:000235796100033 PM 16568770 ER PT J AU Bardayan, DW AF Bardayan, D. W. TI Recent astrophysical studies with exotic beams at ORNL SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article AB The availability of exotic beams has produced great opportunities for advances in our understanding of the nucleosynthesis occurring in stellar burning and stellar explosions such as novae, X-ray bursts, and supernovae. In these extreme environments, synthesized radioactive nuclei can undergo subsequent nuclear processing before they decay, and thus to understand these events, we must understand reaction rates involving radioactive nuclei. At the ORNL Holifield Radioactive Ion Beam Facility (HRIBF), we have made a number of measurements using proton-rich beams such as F-18 and Be-7 and neutron-rich beams such as Ge-82 and Se-84 that help clarify the structure of astrophysically-important nuclei. We are also poised to begin studies with doubly-magic Sn-132. The experimental methods and results are discussed. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Bardayan, DW (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. EM bardayan@mail.phy.ornl.gov FU Oak Ridge National Laboratory; U.S. Department of Energy [DE-AC05-00OR22725] FX Most of the experiments mentioned here were performed by the Radioactive Ion Beams for Explosive Nucleosynthesis Studies (RIBENS) Collaboration, which is a collaboration of over 30 scientists from 11 institutions including ORNL, Rutgers University, Tennessee Technological University, Colorado School of Mines, Ohio University, Yale University, and the University of North Carolina at Chapel Hill. This research was sponsored, in part, by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy under Contract No. DE-AC05-00OR22725. NR 46 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD MAR PY 2006 VL 27 SU 1 BP 97 EP 106 DI 10.1140/epja/i2006-08-014-9 PG 10 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA V19NQ UT WOS:000208079500015 ER PT J AU Jenkins, DG Lister, CJ Janssens, RVF Khoo, TL Moore, EF Rehm, KE Seweryniak, D Wuosmaa, AH Davinson, T Woods, PJ Jokinen, A Penttila, H Martinez-Pinedo, G Jose, J AF Jenkins, D. G. Lister, C. J. Janssens, R. V. F. Khoo, T. L. Moore, E. F. Rehm, K. E. Seweryniak, D. Wuosmaa, A. H. Davinson, T. Woods, P. J. Jokinen, A. Penttila, H. Martinez-Pinedo, G. Jose, J. TI Re-evaluating reaction rates relevant to nova nucleosynthesis from a nuclear structure perspective SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article AB Conventionally, reaction rates relevant to nova nucleosynthesis are determined by performing the relevant proton capture reactions directly for stable species, or as has become possible more recently in inverse kinematics using short-lived accelerated radioactive beams with recoil separators. A secondary approach is to compile information on the properties of levels in the Gamow window using transfer reactions. We present a complementary technique where the states of interest are populated in a heavy-ion fusion reaction and their gamma decay studied with a state-of-the-art array of high-purity germanium detectors. The advantages of this approach, including the ability to determine resonance energies with high precision and the possibility of determining spins and parities from gamma-ray angular distributions are discussed. Two specific examples related to the (22)Na(p, gamma) and (30)P(p, gamma) reactions are presented. C1 [Jenkins, D. G.] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England. [Lister, C. J.; Janssens, R. V. F.; Khoo, T. L.; Moore, E. F.; Rehm, K. E.; Seweryniak, D.; Wuosmaa, A. H.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. [Davinson, T.; Woods, P. J.] Univ Edinburgh, Sch Phys, Edinburgh, Midlothian, Scotland. [Jokinen, A.; Penttila, H.] Univ Jyvaskyla, Dept Phys, Jyvaskyla, Finland. [Martinez-Pinedo, G.] ICREA, E-08010 Barcelona, Spain. [Martinez-Pinedo, G.; Jose, J.] IEEC, E-08034 Barcelona, Spain. RP Jenkins, DG (reprint author), Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England. EM dj4@york.ac.uk RI Martinez-Pinedo, Gabriel/A-1915-2013; Penttila, Heikki/A-4420-2013; Jokinen, Ari/C-2477-2017 OI Martinez-Pinedo, Gabriel/0000-0002-3825-0131; Jokinen, Ari/0000-0002-0451-125X NR 17 TC 2 Z9 2 U1 0 U2 2 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD MAR PY 2006 VL 27 SU 1 BP 117 EP 121 DI 10.1140/epja/i2006-08-016-7 PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA V19NQ UT WOS:000208079500017 ER PT J AU Mukhamedzhanov, AM Blokhintsev, LD Brown, BA Burjan, V Cherubini, S Gagliardi, CA Irgaziev, BF Kroha, V Nunes, FM Pirlepesov, F Pizzone, RG Romano, S Spitaleri, C Tang, XD Trache, L Tribble, RE Tumino, A AF Mukhamedzhanov, A. M. Blokhintsev, L. D. Brown, B. A. Burjan, V. Cherubini, S. Gagliardi, C. A. Irgaziev, B. F. Kroha, V. Nunes, F. M. Pirlepesov, F. Pizzone, R. G. Romano, S. Spitaleri, C. Tang, X. D. Trache, L. Tribble, R. E. Tumino, A. TI Indirect techniques in nuclear astrophysics Asymptotic Normalization Coefficient and Trojan Horse SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article ID S-FACTOR; COULOMB DISSOCIATION; VERTEX CONSTANT; CROSS-SECTIONS; LOW ENERGIES; STARS AB Owing to the presence of the Coulomb barrier at astrophysically relevant kinetic energies it is very difficult, or sometimes impossible, to measure astrophysical reaction rates in the laboratory. That is why different indirect techniques are being used along with direct measurements. Here we address two important indirect techniques, the asymptotic normalization coefficient (ANC) and the Trojan Horse (TH) methods. We discuss the application of the ANC technique for calculation of the astrophysical processes in the presence of subthreshold bound states, in particular, two different mechanisms are discussed: direct capture to the subthreshold state and capture to the low-lying bound states through the subthreshold state, which plays the role of the subthreshold resonance. The ANC technique can also be used to determine the interference sign of the resonant and nonresonant (direct) terms of the reaction amplitude. The TH method is unique indirect technique allowing one to measure astrophysical rearrangement reactions down to astrophysically relevant energies. We explain why there is no Coulomb barrier in the sub-process amplitudes extracted from the TH reaction. The expressions for the TH amplitude for direct and resonant cases are presented. C1 [Mukhamedzhanov, A. M.; Gagliardi, C. A.; Pirlepesov, F.; Trache, L.; Tribble, R. E.] Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA. [Blokhintsev, L. D.] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, Russia. [Brown, B. A.; Nunes, F. M.] Michigan State Univ, NSCL, E Lansing, MI 48824 USA. [Brown, B. A.; Nunes, F. M.] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. [Burjan, V.; Kroha, V.] Acad Sci Czech Republic, Inst Nucl Phys, Prague, Czech Republic. [Cherubini, S.; Pizzone, R. G.; Romano, S.; Spitaleri, C.; Tumino, A.] Univ Catania, DMFCI, Catania, Italy. [Cherubini, S.; Pizzone, R. G.; Romano, S.; Spitaleri, C.; Tumino, A.] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95129 Catania, Italy. [Irgaziev, B. F.] Natl Univ, Dept Phys, Tashkent, Uzbekistan. [Tang, X. D.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Mukhamedzhanov, AM (reprint author), Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA. EM akram@comp.tamu.edu RI Tumino, Aurora/I-3941-2012; Pizzone, Rosario/I-4527-2015; Spitaleri, Claudio/K-3215-2015; Tang, Xiaodong /F-4891-2016; Trache, Livius/M-6265-2016; Cherubini, Silvio/F-3503-2017; OI Tumino, Aurora/0000-0002-6953-7725; Pizzone, Rosario/0000-0003-2436-6640; Spitaleri, Claudio/0000-0001-6256-9727; Cherubini, Silvio/0000-0002-1974-0389 FU U.S. Department of Energy [DE-FG03-93ER40773]; U.S. National Science Foundation [INT-9909787, PHY-0140343]; NSF [ME 385(2000), ME 643(2003)]; MSMT, CR [K1048102]; Grant Agency of the Czech Republic [202/05/0302]; Robert A. Welch Foundation FX This work was supported by the U.S. Department of Energy under Grant No. DE-FG03-93ER40773, the U.S. National Science Foundation under Grant No. INT-9909787 and Grant No. PHY-0140343, ME 385(2000) and ME 643(2003) projects NSF and MSMT, CR, project K1048102 and grant No. 202/05/0302 of the Grant Agency of the Czech Republic, and by the Robert A. Welch Foundation. NR 31 TC 17 Z9 17 U1 2 U2 4 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1434-6001 EI 1434-601X J9 EUR PHYS J A JI Eur. Phys. J. A PD MAR PY 2006 VL 27 SU 1 BP 205 EP 215 DI 10.1140/epja/i2006-08-032-7 PG 11 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA V19NQ UT WOS:000208079500033 ER PT J AU Urban, W Sarkar, MS Sarkar, S Rzaca-Urban, T Durell, JL Smith, AG Genevey, JA Pinston, JA Simpson, GS Ahmad, I AF Urban, W Sarkar, MS Sarkar, S Rzaca-Urban, T Durell, JL Smith, AG Genevey, JA Pinston, JA Simpson, GS Ahmad, I TI New information on the T-1/2=47 s isomer in the I-136 nucleus SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article ID SPONTANEOUS FISSION; SN-132 REGION; DRIP-LINE; NEUTRON; DECAY; MASS; STATES; ENERGIES; TE-136 AB The I-136 nucleus, populated in the spontaneous fission of Cm-248, was studied by means of prompt gamma-ray spectroscopy using the EUROGAM2 array. The observation in this work of the 42.6 keV prompt-gamma, M1 + E2 transition de-exciting the 7(-) level in I-136 indicates that this level, interpreted as the (pi g(7/2)(3)vf(7/2))(7)- configuration, does not correspond to the T = 47s, beta-decaying isomer in I-136. The isomer is placed 42.6 keV below the 7(-) level. It has spin 6(-) and is interpreted as the (pi g(7/2)(2)d(5/2)vf(7/2))(6)- configuration. This and other members of both multiplets can be reproduced properly only if one assumes that the pi d(5/2) orbital in I-136 is located 400 keV lower than in Sb-133. Possible mechanisms causing this effect are discussed. C1 Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland. Saha Inst Nucl Phys, Kolkata 700064, W Bengal, India. Univ Burdwan Golapbag, Dept Phys, Burdwan 713104, W Bengal, India. Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England. Univ Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, F-38026 St Martin Dheres, France. Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France. Argonne Natl Lab, Argonne, IL 60439 USA. RP Urban, W (reprint author), Univ Warsaw, Fac Phys, Ul Hoza 69, PL-00681 Warsaw, Poland. EM urban@fuw.edu.pl RI Saha Sarkar, Maitreyee/E-8294-2012 OI Saha Sarkar, Maitreyee/0000-0002-9465-4210 NR 28 TC 10 Z9 11 U1 0 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1434-6001 EI 1434-601X J9 EUR PHYS J A JI Eur. Phys. J. A PD MAR PY 2006 VL 27 IS 3 BP 257 EP 262 DI 10.1140/epja/i2005-10273-1 PG 6 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 041GM UT WOS:000237442400001 ER PT J AU Achouri, NL Santos, FDO Lewitowicz, M Blank, B Aysto, J Canchel, G Czajkowski, S Dendooven, P Emsallem, A Giovinazzo, J Guillet, N Jokinen, A Larid, AM Longour, C Perajarvi, K Smirnova, N Stanoiu, M Thomas, JC AF Achouri, NL Santos, FDO Lewitowicz, M Blank, B Aysto, J Canchel, G Czajkowski, S Dendooven, P Emsallem, A Giovinazzo, J Guillet, N Jokinen, A Larid, AM Longour, C Perajarvi, K Smirnova, N Stanoiu, M Thomas, JC TI The beta-decay of Al-22 SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article ID DELAYED-PROTON DECAY; NUCLEAR-DATA SHEETS; NUBASE EVALUATION; SPECTROSCOPY; EMISSION AB In an experiment performed at the LISE3 facility of GANIL, we studied the decay of Al-22 produced by the fragmentation of a Ar-36 primary beam. A beta-decay half-life of T-1/2 = 91.1 +/- 0.5ms was measured. The beta-delayed one- and two-proton emission as well as beta-alpha and beta-delayed gamma-decays were measured and allowed us to establish a partial decay scheme for this nucleus. New levels were determined in the daughter nucleus Mg-22. The comparison with model calculations strongly favours a spin-parity of I-pi = 4(+) for the ground state of Al-22. C1 ISMRA Univ Caen, Phys Corpusculaire Lab, F-14050 Caen, France. Grand Accelerateur Natl Ions Lourds, F-14076 Caen 5, France. CEN Bordeaux Gradignan, F-33175 Gradignan, France. Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland. Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands. Univ Lyon 1, Inst Phys Nucl, F-69622 Villeurbanne, France. Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England. IReS Strasbourg, F-67037 Strasbourg, France. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Ghent, Vakgrp Subatom & Stralingsfys, Ghent, Belgium. Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany. RP Achouri, NL (reprint author), ISMRA Univ Caen, Phys Corpusculaire Lab, 6 Bd Mal Juin, F-14050 Caen, France. EM achouri@lpccaen.in2p3.fr RI Jokinen, Ari/C-2477-2017 OI Jokinen, Ari/0000-0002-0451-125X NR 20 TC 11 Z9 11 U1 0 U2 2 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD MAR PY 2006 VL 27 IS 3 BP 287 EP 300 DI 10.1140/epja/i2005-10274-0 PG 14 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 041GM UT WOS:000237442400004 ER PT J AU Kubono, S Teranishi, T Notani, M Yamaguchi, H Saito, A He, JJ Wakabayashi, Y Fujikawa, H Amadio, G Baba, H Fukuchi, T Shimoura, S Michimasa, S Nishimura, S Nishimura, M Gono, Y Odahara, A Kato, S Moon, JY Lee, JH Kwon, YK Lee, CS Hahn, KI Fulop, Z Guimaraes, V Lichtenthaler, R AF Kubono, S. Teranishi, T. Notani, M. Yamaguchi, H. Saito, A. He, J. J. Wakabayashi, Y. Fujikawa, H. Amadio, G. Baba, H. Fukuchi, T. Shimoura, S. Michimasa, S. Nishimura, S. Nishimura, M. Gono, Y. Odahara, A. Kato, S. Moon, J. Y. Lee, J. H. Kwon, Y. K. Lee, C. S. Hahn, K. I. Fueloep, Zs Guimaraes, V. Lichtenthaler, R. TI Nuclear astrophysics at the east drip line SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article AB In the first half of the paper, the nuclear astrophysics activities in Japan, especially in experimental studies are briefly overviewed. A variety of beams have been developed and used for nuclear astrophysics experiments in Japan. The activities include the RI beam facilities at low energies by the in-flight method at the Center for Nuclear Study (CNS), University of Tokyo and by the ISOL-based method at the JAERI tandem facility, and the RI beam facility at intermediate energies at RIKEN. Other activities include a study of the (12)C(alpha,gamma)(16)O reaction exclusively at the tandem accelerator at the Kyushu University, and studies at the neutron facility at Tokyo Institute of Technology and at the photon facility at AIST (Sanso-ken). Research opportunities in the future at RIBF, J-PARC, and SPRING8 are also discussed. A discussion on the research activities at CNS has been specifically extended in the latter half, including various possibilities in collaboration at the RI beam factory at RIKEN. C1 [Kubono, S.; Yamaguchi, H.; Saito, A.; He, J. J.; Wakabayashi, Y.; Fujikawa, H.; Amadio, G.; Shimoura, S.] Univ Tokyo, CNS, Wako Branch, RIKEN, Wako, Saitama 3510198, Japan. [Teranishi, T.; Wakabayashi, Y.; Nishimura, M.] Kyushu Univ, Dept Phys, Fukuoka 8128581, Japan. [Notani, M.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. [Fukuchi, T.] Rikkyo Univ, Toshima Ku, Tokyo 1710021, Japan. [Odahara, A.] Nishi Nippon Inst Technol, Fukuoka 8000394, Japan. [Kato, S.] Yamagata Univ, Dept Phys, Yamagata 9998560, Japan. [Moon, J. Y.; Lee, J. H.; Kwon, Y. K.; Lee, C. S.] Chung Ang Univ, Dept Phys, Seoul 156756, South Korea. [Hahn, K. I.] Ewha Womans Univ, Seoul 120750, South Korea. [Fueloep, Zs] Inst Nucl Res ATOMKI, H-4001 Debrecen, Hungary. [Guimaraes, V.; Lichtenthaler, R.] Univ Sao Paulo, Dept Fysica Nucl, Sao Paulo, Brazil. RP Kubono, S (reprint author), Univ Tokyo, CNS, Wako Branch, RIKEN, Hirosawa 2-1, Wako, Saitama 3510198, Japan. EM kubono@cns.s.u-tokyo.ac.jp RI Fulop, Zsolt/B-2262-2008; Teranishi, Takashi/D-2166-2012; Shimoura, Susumu/E-8692-2012; Lichtenthaler, Rubens/K-7278-2012; Guimaraes, Valdir/B-4958-2014; Amadio, Guilherme/M-3195-2015; Fukuchi, Tomonori/D-3855-2017 OI Shimoura, Susumu/0000-0003-4741-2865; Lichtenthaler, Rubens/0000-0001-8317-2630; Guimaraes, Valdir/0000-0003-3715-0726; Amadio, Guilherme/0000-0002-2102-7945; Fukuchi, Tomonori/0000-0003-3566-9954 NR 20 TC 5 Z9 5 U1 0 U2 2 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD MAR PY 2006 VL 27 SU 1 BP 327 EP 332 DI 10.1140/epja/i2006-08-050-5 PG 6 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA V19NQ UT WOS:000208079500051 ER PT J AU Enberg, R Pire, B Szymanowski, L Wallon, S AF Enberg, R. Pire, B. Szymanowski, L. Wallon, S. TI BFKL resummation effects in gamma*gamma*->rho rho SO EUROPEAN PHYSICAL JOURNAL C LA English DT Article ID LARGE MOMENTUM-TRANSFER; TO-LEADING BFKL; VECTOR-MESON PHOTOPRODUCTION; TOTAL CROSS-SECTION; DIPOLE CHAIN MODEL; QCD POMERON; QUANTUM CHROMODYNAMICS; DIFFRACTIVE PHOTOPRODUCTION; E(+)E(-) COLLISIONS; PERTURBATION-THEORY AB We calculate the leading order BFKL amplitude for the exclusive diffractive process gamma(L)*(Q(1)(2))gamma(L)*(Q(2)(2)) -> rho(0)(L)rho(0)(L) in the forward direction, which can be studied in future high energy e(+)e(-) linear colliders. The resummation effects are very large compared to the fixed-order calculation. We also estimate the next-to-leading logarithmic corrections to the amplitude by using a specific resummation of higher order effects and find a substantial growth with energy, but smaller than in the leading logarithmic approximation. C1 Ecole Polytech, CPHT, F-91128 Palaiseau, France. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland. Univ Liege, B-4000 Cointe Ougree, Belgium. Univ Paris 11, LPT, F-91405 Orsay, France. RP Enberg, R (reprint author), Ecole Polytech, CPHT, F-91128 Palaiseau, France. EM REnberg@lbl.gov RI Pire, Bernard/I-3994-2013; OI Enberg, Rikard/0000-0003-0452-0671 NR 63 TC 31 Z9 32 U1 0 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 1434-6044 J9 EUR PHYS J C JI Eur. Phys. J. C PD MAR PY 2006 VL 45 IS 3 BP 759 EP 769 DI 10.1140/epjc/s2005-02451-2 PG 11 WC Physics, Particles & Fields SC Physics GA 098YI UT WOS:000241559300014 ER PT J AU Carena, M Heinemeyer, S Wagner, CEM Weiglein, G AF Carena, M. Heinemeyer, S. Wagner, C. E. M. Weiglein, G. TI MSSM Higgs boson searches at the Tevatron and the LHC: Impact of different benchmark scenarios SO EUROPEAN PHYSICAL JOURNAL C LA English DT Review ID EXPLICIT CP VIOLATION; SUPERSYMMETRIC STANDARD MODEL; FEYNMAN-DIAGRAMMATIC APPROACH; HIGH-PRECISION PREDICTIONS; QUARK SCALAR CURRENTS; RADIATIVE-CORRECTIONS; QCD CORRECTIONS; PERTURBATIVE QCD; HADRON COLLIDERS; FERMIONIC DECAYS AB The Higgs boson search has shifted from LEP2 to the Tevatron and will subsequently move to the LHC. The current limits from the Tevatron and the prospective sensitivities at the LHC are often interpreted in specific MSSM scenarios. For heavy Higgs boson production and subsequent decay into b (b) over bar or tau(+)tau(-), the present Tevatron data allow one to set limits in the M-A-tan beta plane for small M-A and large tan 0 values. Similar channels have been explored for the LHC, where the discovery reach extends to higher values of M-A and smaller tan beta. Searches for MSSM charged Higgs bosons, produced in top decays or in association with top quarks, have also been investigated at the Tevatron and the LHC. We analyze the current Tevatron limits and prospective LHC sensitivities. We discuss how robust they are with respect to variations of the other MSSM parameters and possible improvements of the theoretical predictions for Higgs boson production and decay. It is shown that the inclusion of supersymmetric radiative corrections to the production cross sections and decay widths leads to important modifications of the present limits on the MSSM parameter space. The impact on the region where only the lightest MSSM Higgs boson can be detected at the LHC is also analyzed. We propose to extend the existing benchmark scenarios by including additional values of the higgsino mass parameter mu. This affects only slightly the search channels for a SM-like Higgs boson, while having a major impact on the searches for non-standard MSSM Higgs bosons. C1 Dept Theoret Phys, Batavia, IL 60510 USA. CERN, Dept Phys, TH Div, CH-1211 Geneva 23, Switzerland. Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Univ Durham, IPPP, Durham DH1 3LE, England. RP Carena, M (reprint author), Dept Theoret Phys, Batavia, IL 60510 USA. EM carena@fnal.gov; Sven.Heinemeyer@cern.ch; cwagner@hep.anl.gov; Georg.Weiglein@durham.ac.uk NR 118 TC 92 Z9 92 U1 0 U2 2 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1434-6044 J9 EUR PHYS J C JI Eur. Phys. J. C PD MAR PY 2006 VL 45 IS 3 BP 797 EP 814 DI 10.1140/epjc/s2005-02470-y PG 18 WC Physics, Particles & Fields SC Physics GA 098YI UT WOS:000241559300018 ER PT J AU Chia, EEM Salamon, MB Park, T Kim, HJ Lee, SI Takeya, H AF Chia, EEM Salamon, MB Park, T Kim, HJ Lee, SI Takeya, H TI Observation of the spontaneous vortex phase in the weakly ferromagnetic superconductor ErNi2B2C: A penetration depth study SO EUROPHYSICS LETTERS LA English DT Article ID SINGLE-CRYSTAL ERNI2B2C; TEMPERATURE; COEXISTENCE; MAGNETISM; STATE; FILMS AB The coexistence of weak ferromagnetism and superconductivity in ErNi2B2C suggests the possibility of a spontaneous vortex phase (SVP) in which vortices appear in the absence of an external field. We report evidence for the long-sought SVP from the in-plane magnetic penetration depth Delta lambda(T) of high-quality single crystals of ErNi2B2C. In addition to expected features at the Neel temperature T-N = 6.0 K and weak ferromagnetic onset at T-WFM = 2.3K, Delta lambda(T) rises to a maximum at T-m = 0.45 K before dropping sharply down to similar to 0.1 K. We assign the 0.45 K maximum to the proliferation and freezing of spontaneous vortices. A model proposed by Koshelev and Vinokur explains the increasing Delta lambda(T) as a consequence of increasing vortex density, and its subsequent decrease below T-m as defect pinning suppresses vortex hopping. C1 Univ Illinois, Dept Phys, Urbana, IL 61801 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Pohang Univ Sci & Technol, Natl Creat Res Initiat Ctr Superconduct, Pohang 790784, South Korea. Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea. Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan. Univ Illinois, Ctr Microanal Mat, Urbana, IL 61801 USA. RP Chia, EEM (reprint author), Univ Illinois, Dept Phys, 1110 W Green St, Urbana, IL 61801 USA. RI Park, Tuson/A-1520-2012; Chia, Elbert/B-6996-2011 OI Chia, Elbert/0000-0003-2066-0834 NR 29 TC 4 Z9 4 U1 0 U2 2 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 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD MAR PY 2006 VL 73 IS 5 BP 772 EP 778 DI 10.1209/epl/i2005-10465-7 PG 7 WC Physics, Multidisciplinary SC Physics GA 018PT UT WOS:000235778000018 ER PT J AU Basagaoglu, H Meakin, P Succi, S Welhan, J AF Basagaoglu, H Meakin, P Succi, S Welhan, J TI Boundary effects on the onset of nonlinear flow in porous domains SO EUROPHYSICS LETTERS LA English DT Article ID PARTICLE IMAGE VELOCIMETRY; MEDIA AB The effects of flow domain boundaries on the onset ofnonlinear flow, and kinetic-energy and energy dissipation densities in three-dimensional heterogeneous porous domains were analyzed. The analyses were based on kinetic-energy and energy dissipation participation numbers, and a 3D lattice Boltzmann model was used to simulate gravity-driven single-phase flow in random porous media. The results revealed that the boundary conditions (periodic vs. no-slip) parallel to the main flow direction have insignificant effects on the magnitude of the critical Reynolds number, that characterizes the onset of nonlinear effects, although it affected the spatial correlations of pore-scale kinetic-energy and energy dissipation densities in all Cartesian directions. Flow domains with periodic boundaries resulted in less-localized (more dispersed) steady-state flows than domains with no-slip boundaries. C1 Oregon State Univ, Dept Geosci, Corvallis, OR 97331 USA. Idaho Natl Lab, Idaho Falls, ID 83415 USA. CNR, IAC, Ist Applicaz Calcolo, I-00161 Rome, Italy. Idaho State Univ, Dept Geosci, Pocatello, ID 83209 USA. RP Basagaoglu, H (reprint author), Oregon State Univ, Dept Geosci, Corvallis, OR 97331 USA. RI Succi, Sauro/E-4606-2015 OI Succi, Sauro/0000-0002-3070-3079 NR 13 TC 4 Z9 4 U1 0 U2 4 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 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD MAR PY 2006 VL 73 IS 6 BP 858 EP 863 DI 10.1209/epl/i2005-10474-6 PG 6 WC Physics, Multidisciplinary SC Physics GA 018PU UT WOS:000235778100008 ER PT J AU Schirmacher, W AF Schirmacher, W TI Thermal conductivity of glassy materials and the "boson peak" SO EUROPHYSICS LETTERS LA English DT Article ID VIBRATIONAL EXCITATIONS; AMORPHOUS SOLIDS; VITREOUS SILICA; PHONON LOCALIZATION; DISORDERED-SYSTEMS; HEAT-TRANSPORT; RANDOM-MATRIX; TEMPERATURE; LIQUIDS; MODES AB A theory for the anomalous vibrational and thermal properties of disordered solids based on the model assumption of randomly fluctuating transverse elastic constants is presented. Mean-field expressions for the vibrational density of states and the energy diffusivity are derived with field-theoretical techniques. As in previous approaches of this type the boson peak (enhancement of the low-frequency density of states) is explained as a result of the frozen-in disorder and compares well with the experimental findings. The plateau in the temperature variation of the thermal conductivity and the behavior beyond the plateau is shown to arise from the enhanced scattering in the boson peak regime and to be essentially a harmonic phenomenon. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Tech Univ Munich, Phys Dept E13, D-85747 Garching, Germany. RP Schirmacher, W (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 56 TC 93 Z9 93 U1 0 U2 22 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 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD MAR PY 2006 VL 73 IS 6 BP 892 EP 898 DI 10.1209/epl/i2005-10471-9 PG 7 WC Physics, Multidisciplinary SC Physics GA 018PU UT WOS:000235778100013 ER PT J AU Li, CH Kim, HJ Jiang, J Li, C Koga, T Lurio, L Schwarz, S Narayanan, S Lee, HJ Lee, YJ Jiang, Z Sinha, S Rafailovich, MH Sokolov, JC AF Li, CH Kim, HJ Jiang, J Li, C Koga, T Lurio, L Schwarz, S Narayanan, S Lee, HJ Lee, YJ Jiang, Z Sinha, S Rafailovich, MH Sokolov, JC TI The effect of surface interactions on the viscosity of polymer thin films SO EUROPHYSICS LETTERS LA English DT Article ID INTERFACE; POLYSTYRENE; DIFFUSION; BEHAVIOR; REGIME; MELTS AB We have measured the viscosity of thin polymer films as a function of film thickness using three independent techniques. The results of all methods indicated that the viscosity of the film increases about two orders of magnitude near the solid substrate. Measurements performed on split layer substrates indicated that a layer of polymer chains remained permanently adsorbed at the Si substrate. This layer was responsible for trapping subsequent layers, and propagating the effect of surface interactions to chains without direct contacts to the solid substrate. If this layer was applied prior to the rest of the film, it can screen the surface interactions and even initiate auto-dewetting of other chemically identical layers above it. C1 SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA. Sogang Univ, Dept Phys, Seoul 121742, South Korea. Sogang Univ, Interdisciplinary Program Integrated Biotechnol, Seoul 121742, South Korea. No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. CUNY Queens Coll, Dept Phys, Flushing, NY 11367 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. RP Li, CH (reprint author), SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA. EM chuli@ic.sunysb.edu; mrafailovich@notes.cc.sunysb.edu RI Koga, Tadanori/A-4007-2010; Jiang, Zhang/A-3297-2012 OI Jiang, Zhang/0000-0003-3503-8909 NR 22 TC 11 Z9 12 U1 1 U2 6 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 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD MAR PY 2006 VL 73 IS 6 BP 899 EP 905 DI 10.1209/epl/i2005-10475-5 PG 7 WC Physics, Multidisciplinary SC Physics GA 018PU UT WOS:000235778100014 ER PT J AU Tafuri, F Kirtley, JR Born, D Stornaiuolo, D Medaglia, PG Orgiani, P Balestrino, G Kogan, VG AF Tafuri, F Kirtley, JR Born, D Stornaiuolo, D Medaglia, PG Orgiani, P Balestrino, G Kogan, VG TI Dissipation in ultra-thin current-carrying superconducting bridges; evidence for quantum tunneling of Pearl vortices SO EUROPHYSICS LETTERS LA English DT Article ID VORTEX; FILMS AB We have made zero-field current-voltage (IV) measurements of artificially layered high-T-c thin-film bridges. SQUID microscopy of these films provides Pearl lengths. longer than the bridge widths, and shows current distributions that are uniform across the bridges. At high temperatures and high currents the voltages follow the power law V proportional to I-n, with n = phi(2)(0)/8 pi(2)Lambda kT + 1, in good agreement with the predictions for thermally activated vortex motion. At low temperatures, the IV's are better fit by ln V linear in I-2, as expected if the low-temperature dissipation is dominated by quantum tunneling of individual Pearl vortices. C1 Univ Naples 2, Dipartimento Ingn Informaz, Aversa, CE, Italy. IBM Corp, Watson Res Ctr, Yorktown Hts, NY 10598 USA. Univ Naples Federico II, Dipartimento Sci Fisiche, CNR, INFM Coherentia, Naples, Italy. Univ Roma Tor Vergata, Dipartimento Ingn Meccan, CNR, INFM Coherentia, I-00173 Rome, Italy. Iowa State Univ, Ames Lab, DOE, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Tafuri, F (reprint author), Univ Naples 2, Dipartimento Ingn Informaz, Aversa, CE, Italy. RI Orgiani, Pasquale/E-7146-2013; stornaiuolo, daniela/D-2516-2014; OI Orgiani, Pasquale/0000-0002-1082-9651; Tafuri, Francesco/0000-0003-0784-1454 NR 20 TC 36 Z9 36 U1 1 U2 11 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 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD MAR PY 2006 VL 73 IS 6 BP 948 EP 954 DI 10.1209/epl/i2005-10485-3 PG 7 WC Physics, Multidisciplinary SC Physics GA 018PU UT WOS:000235778100021 ER PT J AU Phelippeau, A Pommier, S Zakharchenko, I Levy-Tubiana, R Tsakalakos, T Clavel, M Croft, M Zhong, Z Prioul, C AF Phelippeau, A Pommier, S Zakharchenko, I Levy-Tubiana, R Tsakalakos, T Clavel, M Croft, M Zhong, Z Prioul, C TI Cold drawn steel wires-processing, residual stresses and ductility - Part II: Synchrotron and neutron diffraction SO FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES LA English DT Article DE EDXRD; elongation to failure; martensite; martensite transformation; residual stress AB Cold drawing of steel wires leads to an increase of their mechanical strength and to a drop in their ductility. The increase of their mechanical strength has long been related to the reduction of the various material scales by an intense plastic deformation. Besides, it was discussed in the companion paper that large plastic deformation leads to the loss of the material hardening capabilities and that, in such a case, residual stresses preserve the elongation to failure of wires. Experimental measurements of residual stresses inside the wire have therefore been undertaken. In this paper, lattice parameters as measured using synchrotron diffraction are compared with those calculated using the residual stress fields as determined by the finite-element method. There is a major disagreement between experimental and numerical results that is too large to be attributed to the errors of the finite-element analyses. Therefore, neutron diffraction experiments have also been performed. These measurements show that there is a significant variation of the lattice parameter with the drawing level, which is not inherited from residual stresses, and that variation is very sensitive to the cooling rate after processing. It is therefore proposed that cold drawing would induce a phase transformation of the steel, possibly a martensitic transformation. C1 Ecole Normale Super, LMT, F-94235 Cachan, France. Ecole Cent Paris, MSSMat, F-92295 Chatenay Malabry, France. CEA Saclay, LLB, F-91191 Gif Sur Yvette, France. Rutgers State Univ, Dept Mat Sci & Engn, Piscataway, NJ 08854 USA. Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. RP Pommier, S (reprint author), Ecole Normale Super, LMT, 61 Ave President Wilson, F-94235 Cachan, France. EM pommier@lmt.ens-cachan.fr NR 9 TC 2 Z9 2 U1 1 U2 4 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 8756-758X J9 FATIGUE FRACT ENG M JI Fatigue Fract. Eng. Mater. Struct. PD MAR PY 2006 VL 29 IS 3 BP 255 EP 265 DI 10.1111/j.1460-2695.2005.00987.x PG 11 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA 015ZF UT WOS:000235589500009 ER PT J AU Bagwell, CE Liu, X Wu, L Zhou, J AF Bagwell, CE Liu, X Wu, L Zhou, J TI Effects of legacy nuclear waste on the compositional diversity and distributions of sulfate-reducing bacteria in a terrestrial subsurface aquifer SO FEMS MICROBIOLOGY ECOLOGY LA English DT Article DE sulfate-reducing bacteria; dsrAB; metals; community stability ID DISSIMILATORY METAL REDUCTION; IRON REACTIVE BARRIER; DESULFOVIBRIO-DESULFURICANS; URANIUM REDUCTION; HEAVY-METAL; MICROBIAL COMMUNITIES; SEDIMENT; SOIL; BIOREMEDIATION; CONTAMINATION AB The impact of legacy nuclear waste on the compositional diversity and distribution of sulfate-reducing bacteria in a heavily contaminated subsurface aquifer was examined. dsrAB clone libraries were constructed and restriction fragment length polymorphism (RFLP) analysis used to evaluate genetic variation between sampling wells. Principal component analysis identified nickel, nitrate, technetium, and organic carbon as the primary variables contributing to well-to-well geochemical variability, although comparative sequence analysis showed the sulfate-reducing bacteria community structure to be consistent throughout contaminated and uncontaminated regions of the aquifer. Only 3% of recovered dsrAB gene sequences showed apparent membership to the Deltaproteobacteria. The remainder of recovered sequences may represent novel, deep-branching lineages that, to our knowledge, do not presently contain any cultivated members; although corresponding phylotypes have recently been reported from several different marine ecosystems. These findings imply resiliency and adaptability of sulfate-reducing bacteria to extremes in environmental conditions, although the possibility for horizontal transfer of dsrAB is also discussed. C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Cent S Univ, Sch Minerals Proc & Bioengn, Changsha, Peoples R China. RP Zhou, J (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Bethel Valley Rd,Bldg 1505 MS 6038, Oak Ridge, TN 37831 USA. EM zhouj@ornl.gov NR 36 TC 14 Z9 15 U1 2 U2 8 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0168-6496 J9 FEMS MICROBIOL ECOL JI FEMS Microbiol. Ecol. PD MAR PY 2006 VL 55 IS 3 BP 424 EP 431 DI 10.1111/j.1574-6941.2005.00039.x PG 8 WC Microbiology SC Microbiology GA 010EJ UT WOS:000235169400009 PM 16466381 ER PT J AU Guo, XH Tandy, PC Thomas, AW AF Guo, XH Tandy, PC Thomas, AW TI Chiral extrapolation of lattice data for heavy meson hyperfine splittings SO FEW-BODY SYSTEMS LA English DT Article ID SYMMETRY; PHYSICS AB We investigate the chiral extrapolation of the lattice data for the light-heavy meson hyperfine splittings D*-D and B*-B to the physical region for the light quark mass. The chiral loop corrections providing a non-analytic behavior in m(pi) are consistent with the chiral perturbation theory for heavy mesons. Since chiral loop corrections tend to decrease the already too low splittings obtained from linear extrapolation, we investigate two models to guide the form of the analytic background behavior: the constituent quark potential model, and the covariant model of QCD based on the ladder-rainbow truncation of the Dyson-Schwinger equations. The extrapolated hyperfine splittings remain clearly below the experimental values even allowing for the model dependence in the description of the analytic background. C1 Beijing Normal Univ, Key Lab Radiat Beam Technol & Mat Modificat, Natl Minist Educ, Beijing 100875, Peoples R China. Beijing Normal Univ, Inst Low Energy Nucl Phys, Beijing 100875, Peoples R China. Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia. Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia. Kent State Univ, Dept Phys, Nucl Res Ctr, Kent, OH 44242 USA. Jefferson Lab, Newport News, VA 23606 USA. RP Guo, XH (reprint author), Beijing Normal Univ, Key Lab Radiat Beam Technol & Mat Modificat, Natl Minist Educ, Beijing 100875, Peoples R China. EM xhguo@bnu.edu.cn; tandy@cnr2.kent.edu; awthomas@jlab.org OI Thomas, Anthony/0000-0003-0026-499X NR 28 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER WIEN PI WIEN PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 WIEN, AUSTRIA SN 0177-7963 J9 FEW-BODY SYST JI Few-Body Syst. PD MAR PY 2006 VL 38 IS 1 BP 17 EP 29 DI 10.1007/s00601-005-0121-3 PG 13 WC Physics, Multidisciplinary SC Physics GA 020IF UT WOS:000235901400002 ER PT J AU Holladay, CA Kwit, C Collins, B AF Holladay, CA Kwit, C Collins, B TI Woody regeneration in and around aging southern bottomland hardwood forest gaps: Effects of herbivory and gap size SO FOREST ECOLOGY AND MANAGEMENT LA English DT Article DE bottomland hardwoods; canopy gaps; gap partitioning; herbivory; natural regeneration; oak regeneration; seedling establishment and dynamics ID WHITE-TAILED DEER; QUERCUS-MICHAUXII REGENERATION; EXPERIMENTAL CANOPY GAPS; ODOCOILEUS-VIRGINIANUS; SPECIES-DIVERSITY; UNITED-STATES; OPENING SIZE; GROWTH; PENNSYLVANIA; USA AB We examined long-term impacts of mammalian herbivores and canopy gap characteristics on woody plant establishment and growth within six size classes of canopy gaps created in 1994 in a southern bottomland hardwood forest. Woody stem composition (1996, 2004) and height (2004) were assessed in and out of white-tailed deer (Odocoileus virginianus) and swamp rabbit (Sylvilagus aquaticus aquaticus) exclosures in gap centers, and in additional plots in gap centers, edges, and beneath adjacent forest canopy. Herbivory did not influence vegetation patterns. Composition was more homogenous in 1996 than in 2004, both in gap centers, and along the gap center-forest understory gradient. Composition differed among gap sizes (oaks were more prevalent in larger gaps) and with distance from gap centers (wind-dispersed trees, wind- and animal-dispersed trees, and oaks typified gap centers, gap edges, and forest understory, respectively). Seedlings and saplings were tallest in the smallest gaps and gap centers, intermediate on gap edges, and shortest in the forest. Maintaining low deer densities could continue to minimize mammalian herbivore effects on woody regeneration in this bottomland hardwood forest system. In addition, management for canopy openings in a variety of sizes could promote woody vegetation heterogeneity and regeneration of desirable tree species. (c) 2005 Elsevier B.V. All rights reserved. C1 Savannah River Ecol Lab, Aiken, SC 29802 USA. RP Kwit, C (reprint author), Miami Univ, Dept Bot, Oxford, OH 45056 USA. EM kwitc@muohio.edu NR 50 TC 15 Z9 20 U1 2 U2 24 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-1127 EI 1872-7042 J9 FOREST ECOL MANAG JI For. Ecol. Manage. PD MAR 1 PY 2006 VL 223 IS 1-3 BP 218 EP 225 DI 10.1016/j.foreco.2005.11.004 PG 8 WC Forestry SC Forestry GA 018QQ UT WOS:000235780300022 ER PT J AU Dirk, DL Zandhuis, P AF Dirk, DL Zandhuis, P TI The distribution of sulfur compounds in hydrotreated jet fuels: Implications for obtaining low-sulfur petroleum fractions SO FUEL LA English DT Article DE sulfur analysis; jet fuel; simulated distillation ID VACUUM GAS OIL; DIRECT OXIDATION; COMPONENTS; CELL AB The mechanism by which jet fuels are hydrotreated to reduce sulfur levels has some important implications in terms of the species and distribution of sulfur compounds remaining in the fuel. The species of sulfur that. are most difficult to remove by hydrotreating, such as benzothiophenes and methyl- and dimethyl-benzothiophenes, are concentrated in the higher-boiling fraction of the fuel. Consequently, the lower-boiling fractions of the fuel contain much less sulfur. It may be possible, therefore, to obtain petroleum fractions that contain low levels of sulfur simply by distillation of the jet fuel into low-boiling and high-boiling fractions. A mufti-element simulated distillation procedure according to ASTM D-2887, standard test method for boiling range distribution of petroleum fractions by gas chromatography, was coupled with atomic emission detection (GC-AED) and was used to estimate the sulfur concentration in various fractions of jet fuel, namely 20, 50, and 60%. The estimations of sulfur concentration were verified by comparing theta to analyzed sulfur concentrations in several fractions of physical distillations of the jet fuels according to a modified ASTM D-86, standard test method for distillation of petroleum products at atmospheric pressure. Sulfur analyses showed that for all fuels analyzed, the initial 20% boiling fraction of the fuel contained no snore than approximately 5% of the total sulfur concentration. The initial 50% boiling fraction of the fuel contained no more than 25% of the total sulfur concentration, and in most cases contained significantly less (8-16%). The total concentration of sulfur in the jet fuels tested ranged from 260 to 1380 mu g/g, and there did not appear to be a direct relationship between total sulfur concentration and percentage of sulfur in each jet fuel boiling fraction. (c) 2005 Elsevier Ltd. All rights reserved. C1 US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. NETL Site Support Contractor, South Pk, PA 15129 USA. RP Dirk, DL (reprint author), US DOE, Natl Energy Technol Lab, POB 10940, Pittsburgh, PA 15236 USA. EM dlink@netl.doe.gov NR 11 TC 0 Z9 0 U1 2 U2 6 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0016-2361 J9 FUEL JI Fuel PD MAR PY 2006 VL 85 IS 4 BP 451 EP 455 DI 10.1016/j.fuel.2005.08.029 PG 5 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA 995UN UT WOS:000234129800004 ER PT J AU Santana, RC Do, PT Santikunaporn, M Alvarez, WE Taylor, JD Sughrue, EL Resasco, DE AF Santana, RC Do, PT Santikunaporn, M Alvarez, WE Taylor, JD Sughrue, EL Resasco, DE TI Evaluation of different reaction strategies for the improvement of cetane number in diesel fuels SO FUEL LA English DT Article DE cetane number; neural networks; aromatics; diesel; ring opening; ring contraction ID NEURAL-NETWORK PREDICTION; DEEP DESULFURIZATION; ZEOLITE CATALYSTS; DECALIN; HYDROGENATION; TETRALIN; HYDRODESULFURIZATION; DEAROMATIZATION; HYDROCARBONS; PHENANTHRENE AB Cetane number improvement of diesel fuels is a difficult task that refiners will face in the near future. Aromatics saturation by deep hydrogenation is a necessary, but perhaps not sufficient step in the diesel treatment. Some researchers have proposed selective ring opening (SRO) as an additional step in the upgrading. In this work, we explore some possible reaction pathways of compounds typically found in diesel after different levels of hydrogenation, i.e. decalin (decahydronaphthalene), perhydrophenanthrene, tetralin (1,2,3,4-tetrahydronapthalene), as well as 1-ring and 2-ring aromatic phenanthrenes. We have estimated the cetane number (CN) of each individual compound involved in the reaction pathways, using an artificial neural network program that was trained with pure compound cetane numbers from a database. The results demonstrate the great challenge that reaching high CN represents. In the conversion of decalin, acidic catalysts alone are not able to yield products with CN significantly higher than the decalin feed. Similarly, no significant gain in CN can be expected with hydrogenolysis metal catalysts operating via the dicarbene mechanism. Only in the case of selective metal-catalyzed hydrogenolysis, with preferential cleavage at substituted C-C bonds, the predicted products have CN substantially higher than the decalin feed. As expected, branching has a strongly negative effect on the CN and it should be minimized. Both, metal-catalyzed di-carbenium C-C cleavage and acid-catalyzed ring contraction/ring opening combination leave branching groups in the product. Similarly, the acid-catalyzed ring opening of perhydrophenanthrene does not result in a significantly higher CN than the initial feed. The possibility of minimizing hydrogen consumption in the CN improvement process by an initial partial hydrogenation followed by ring opening was tested by using phenanthrene and tetralin as probe molecules. In the first reaction strategy, partially hydrogenated phenanthrenes (1-ring and 2-ring aromatics) were followed by ring opening of one of the saturated rings. Although this option would lead to lower overall hydrogen consumption, it results in products of much lower CNs than the ones obtained by full hydrogenation of phenanthrene. Similar results are obtained for tetralin. From this analysis, it is clear that upgrading CN of diesel requires extensive hydrogen consumption. For further upgrading, highly selective hydrogenolysis catalysts are needed in order to minimize branching and therefore obtain high CN products. (C) 2005 Elsevier Ltd. All rights reserved. C1 Univ Oklahoma, Sch Chem Biol & Mat Engn, Norman, OK 73019 USA. ConocoPhillips Bartlesville Technol Ctr, Bartlesville, OK 74004 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Resasco, DE (reprint author), Univ Oklahoma, Sch Chem Biol & Mat Engn, Norman, OK 73019 USA. EM resasco@ou.edu NR 40 TC 123 Z9 130 U1 3 U2 30 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0016-2361 J9 FUEL JI Fuel PD MAR-APR PY 2006 VL 85 IS 5-6 BP 643 EP 656 DI 10.1016/j.fuel.2005.08.028 PG 14 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA 004PO UT WOS:000234764900008 ER PT J AU Sanders, AJ Gillies, GT AF Sanders, AJ Gillies, GT TI Comment on Lockerbie N.A.: Gen. Rel. Grav. 36, 593 (2004) SO GENERAL RELATIVITY AND GRAVITATION LA English DT Editorial Material DE gravitational constant ID SATELLITE ENERGY-EXCHANGE; GRAVITATIONAL CONSTANT-G AB We comment on the paper "ISLAND - Inverse-Square-Law Acceleration Measurement using Inertial Drift," by Lockerbie, N.A.: Gen. Rel. Grav. 36, 593-600 (2004). C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA. RP Sanders, AJ (reprint author), Oak Ridge Natl Lab, Engn Sci & Technol Div, POB 2008, Oak Ridge, TN 37831 USA. EM asanders@utkux.utcc.utk.edu; gtg@cms.mail.virginia.edu NR 14 TC 0 Z9 0 U1 2 U2 3 PU SPRINGER/PLENUM PUBLISHERS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0001-7701 J9 GEN RELAT GRAVIT JI Gen. Relativ. Gravit. PD MAR PY 2006 VL 38 IS 3 BP 529 EP 532 DI 10.1007/s10714-006-0240-2 PG 4 WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 022UW UT WOS:000236082600012 ER PT J AU Weng, L Rubin, EM Bristow, J AF Weng, L Rubin, EM Bristow, J TI Application of sequence-based methods in human microbial ecology SO GENOME RESEARCH LA English DT Article ID 16S RIBOSOMAL-RNA; HUMAN SUBGINGIVAL CREVICE; IN-SITU HYBRIDIZATION; WHIPPLES-DISEASE; BACTERIAL DIVERSITY; TROPHERYMA-WHIPPLEI; OLIGONUCLEOTIDE MICROARRAY; UNCULTURED MICROORGANISMS; HUMAN EHRLICHIOSIS; PCR AMPLIFICATION AB Ecologists studying microbial life in the environment have recognized the enormous complexity of microbial diversity for many years, and the development of a variety of culture-independent methods, many of them coupled with high-throughput DNA sequencing, has allowed this diversity to be explored in ever-greater detail. Despite the widespread application of these new techniques to the characterization Of uncultivated microbes and microbial communities in the environment, their application to human health and disease has lagged. Because DNA-based techniques for defining Uncultured microbes allow not only cataloging of microbial diversity but also insight into microbial functions, investigators are beginning to apply these tools to the microbial communities that abound oil and within us, in what has aptly been called "the second Human Genome Project." In this review we discuss the sequence-based methods for microbial analysis that are Currently available and their application to identify novel human pathogens, improve diagnosis of known infectious diseases, and advance understanding of our relationship with microbial communities that normally reside in and oil the human body. C1 Joint Genome Inst, Walnut Creek, CA 94598 USA. RP Bristow, J (reprint author), Joint Genome Inst, Walnut Creek, CA 94598 USA. EM jbristow@LBL.gov FU NHLBI NIH HHS [HL007279F] NR 83 TC 24 Z9 26 U1 1 U2 5 PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT PI WOODBURY PA 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2924 USA SN 1088-9051 J9 GENOME RES JI Genome Res. PD MAR PY 2006 VL 16 IS 3 BP 316 EP 322 DI 10.1101/gr.3676406 PG 7 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity GA 018CZ UT WOS:000235742700004 PM 16461883 ER PT J AU Volik, S Raphael, BJ Huang, GQ Stratton, MR Bignel, G Murnane, J Brebner, JH Bajsarowicz, K Paris, PL Tao, QZ Kowbel, D Lapuk, A Shagin, DA Shagina, IA Gray, JW Cheng, JF de Jong, PJ Pevzner, P Collins, C AF Volik, S Raphael, BJ Huang, GQ Stratton, MR Bignel, G Murnane, J Brebner, JH Bajsarowicz, K Paris, PL Tao, QZ Kowbel, D Lapuk, A Shagin, DA Shagina, IA Gray, JW Cheng, JF de Jong, PJ Pevzner, P Collins, C TI Decoding the fine-scale structure of a breast cancer genome and transcriptome SO GENOME RESEARCH LA English DT Article ID DUPLEX-SPECIFIC NUCLEASE; RECEPTOR-GENE CLUSTERS; BOVINE BAC LIBRARY; TELOMERE DYSFUNCTION; CHROMOSOME REARRANGEMENTS; PROSTATE-CANCER; FUSION GENES; CELL-LINES; SEQUENCE; CONSTRUCTION AB A comprehensive understanding of cancer is predicated upon knowledge of the structure of malignant genomes underlying its many variant forms and the molecular mechanisms giving rise to them. It is well established that solid tumor genomes accumulate a large number of genome rearrangements during tumorigenesis. End Sequence Profiling (ESP) maps and clones genome breakpoints associated with all types of genome rearrangements elucidating the structural organization Of tumor genomes. Here we extend the ESP methodology in several directions using the breast cancer cell line MCF-7. First, targeted ESP is applied to multiple amplified loci, revealing a complex process of rearrangement and coamplification in these regions reminiscent of breakage/fusion/bridge cycles. Second, genome breakpoints identified by ESP are confirmed using a combination of DNA sequencing and PCR. Third, in vitro functional Studies assign biological function to a rearranged tumor BAC clone, demonstrating that it encodes antiapoptotic activity. Finally, ESP is extended to the transcriptome identifying four novel fusion transcripts and providing evidence that expression of fusion geries may be common in tumors. These results demonstrate the distinct advantages of ESP including: (1) the ability to detect all types of rearrangements and copy number changes; (2) straightforward integration of ESP data with the annotated genome sequence; (3) immortalization of the genome; (4) ability to generate tumor-specific reagents for in vitro and in Vivo functional Studies. Given these properties, ESP could play an important role in a tumor genome project. C1 Univ Calif San Francisco, Ctr Comprehens Canc, Dept Urol, San Francisco, CA 94115 USA. Univ Calif San Francisco, Ctr Comprehens Canc, Canc Res Inst, San Francisco, CA 94115 USA. Univ Calif San Diego, Dept Comp Sci & Engn, La Jolla, CA 92093 USA. Wellcome Trust Sanger Inst, Cambridge CB10 1SA, England. Dept Radiat Oncol, San Francisco, CA 94103 USA. Amplicon Express, Pullman, WA 99163 USA. Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA. Genom Div, Berkeley, CA 94720 USA. Joint Genome Inst, Berkeley, CA 94720 USA. Evrogen JSC, Moscow 117997, Russia. Childrens Hosp Oakland, BACPAC Resources, Oakland, CA 94609 USA. RP Collins, C (reprint author), Univ Calif San Francisco, Ctr Comprehens Canc, Dept Urol, San Francisco, CA 94115 USA. EM collins@cc.ucsf.edu FU NCI NIH HHS [R01 CA069044, R01 CA69044, R33 CA103068]; NHLBI NIH HHS [U01 HL66728]; NIEHS NIH HHS [R01 ES008427] NR 63 TC 41 Z9 43 U1 0 U2 4 PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT PI COLD SPRING HARBOR PA 1 BUNGTOWN RD, COLD SPRING HARBOR, NY 11724 USA SN 1088-9051 J9 GENOME RES JI Genome Res. PD MAR PY 2006 VL 16 IS 3 BP 394 EP 404 DI 10.1101/gr.4247306 PG 11 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity GA 018CZ UT WOS:000235742700013 PM 16461635 ER PT J AU Luo, CQ Lu, XC Stubbs, L Kim, J AF Luo, CQ Lu, XC Stubbs, L Kim, J TI Rapid evolution of a recently retroposed transcription factor YY2 in mammalian genomes SO GENOMICS LA English DT Article DE retroposition; evolution; zinc finger transcription factor ID BINDING PROTEIN; SEQUENCE ALIGNMENT; GENE DUPLICATION; SP1; CLONING; CHROMOSOME; REPRESSION; RETROGENE; DNA AB YY2 was originally identified due to its unusual similarity to the evolutionarily well-conserved zinc finger gene YY1. In this study, we have determined the evolutionary origin and conservation of YY2 using comparative genomic approaches. Our results indicate that YY2 is a retroposed copy of YY1 that has been inserted into another gene locus named Mbtps2 (membrane-bound transcription factor protease site 2). This retroposition is estimated to have occurred after the divergence of placental mammals from other vertebrates based on the detection of YY2 only in the placental mammals. The N- and C-terminal regions of YY2 have evolved under different selection pressures. The N-terminal region has evolved at a very fast pace with very limited functional constraints, whereas the DNA-binding, C-terminal region still maintains a sequence structure very similar to that of YY1 and is also well conserved among placental mammals. In situ hybridizations using different adult mouse tissues indicate that mouse YY2 is expressed at relatively low levels in Purkinje and granular cells of cerebellum and in neuronal cells of cerebrum, but at very high levels in testis. The expression levels of YY2 are much lower than those of YY1, but the overall spatial expression patterns are similar to those of Mbtps2, suggesting a possible shared transcriptional control between YY2 and Mbtps2. Taken together, the formation and evolution of YY2 represent a very unusual case where a transcription factor was first retroposed into another gene locus encoding a protease and survived with different selection schemes and expression patterns. (c) 2005 Elsevier Inc. All rights reserved. C1 Louisiana State Univ, Dept Biol Sci, Baton Rouge, LA 70803 USA. Lawrence Livermore Natl Lab, Genome Biol Div, Livermore, CA 94551 USA. RP Kim, J (reprint author), Louisiana State Univ, Dept Biol Sci, Baton Rouge, LA 70803 USA. EM jkim@lsu.edu OI Stubbs, Lisa/0000-0002-9556-1972 FU NIGMS NIH HHS [GM66225, R01 GM066225] NR 26 TC 20 Z9 27 U1 0 U2 1 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0888-7543 J9 GENOMICS JI Genomics PD MAR PY 2006 VL 87 IS 3 BP 348 EP 355 DI 10.1016/j.ygeno.2005.11.001 PG 8 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA 017VD UT WOS:000235720500004 PM 16377127 ER PT J AU DePaolo, DJ AF DePaolo, DJ TI Isotopic effects in fracture-dominated reactive fluid-rock systems SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Article ID TROIS-SEIGNEURS-MASSIF; MID-ATLANTIC RIDGE; EAST PACIFIC RISE; HYDROTHERMAL ALTERATION; CONTAMINANT TRANSPORT; GROUNDWATER SYSTEMS; DISCRETE FRACTURES; WEATHERING RATES; OCEANIC-CRUST; IGNEOUS ROCKS AB A mathematical model is presented that describes the effects of pore fluid aqueous diffusion and reaction rate on the isotopic exchange between fluids and rocks in reactive geo-hydrological systems where flow is primarily through fractures. The model describes a simple system with parallel equidistant fractures, and chemical transport in the matrix slabs between fractures by aqueous diffusion through a stagnant pore fluid. The solid matrix exchanges isotopes with pore fluid by solution-precipitation at a rate characterized by a time constant, R (yr(-1)), which is an adjustable parameter. The effects of reaction on the isotopes of a particular element in the fracture fluid are shown to depend on the ratio of the diffusive reaction length for that element (L) to the fracture spacing (b). The reaction length depends on the solid-fluid exchange rate within the matrix, the partitioning of the element between the matrix pore fluid and the matrix solid phase, the porosity and density of the matrix, and the aqueous diffusivity. For L/b < 0.3, fluid-rock isotopic exchange is effectively reduced by a factor of 2L/b relative to a standard porous flow (single porosity) model. For L/b > 1, the parallel fracture model is no different from a porous flow model. If isotopic data are available for two or more elements with different L values, it may be possible to use the model with appropriate isotopic measurements to estimate the spacing of the primary fluid-carrying fractures in natural fluid-rock systems. Examples are given using Sr and O isotopic data from mid-ocean ridge (MOR) hydrothermal vent fluids and Sr isotopes in groundwater aquifers hosted by fractured basalt. The available data for MOR systems are consistent with average fracture spacing of 1-4 m. The groundwater data suggest larger effective fracture spacing, in the range 50-500 m. In general, for fractured rock systems, the effects of fracture-matrix diffusive exchange must be considered when comparing isotopic exchange effects for different elements, as well as for estimating water age using radioactive and cosmogenic isotopes. (c) 2005 Elsevier Inc. All rights reserved. C1 Univ Calif Berkeley, EO Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. RP DePaolo, DJ (reprint author), Univ Calif Berkeley, EO Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA. EM depaolo@eps.berkeley.edu NR 61 TC 23 Z9 23 U1 2 U2 19 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAR 1 PY 2006 VL 70 IS 5 BP 1077 EP 1096 DI 10.1016/j.gca.2005.11.022 PG 20 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 020ZJ UT WOS:000235951700001 ER PT J AU Yanina, SV Rosso, KM Meakin, P AF Yanina, SV Rosso, KM Meakin, P TI Defect distribution and dissolution morphologies on low-index surfaces of alpha-quartz SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Article ID SODIUM-CHLORIDE SOLUTIONS; ATOMIC-FORCE MICROSCOPY; INFRARED-SPECTROSCOPY; KINETICS; SILICA; 25-DEGREES-C; MECHANISMS; WATER; MODEL; PRECIPITATION AB The dissolution of prismatic and rhombohedral quartz surfaces by KOH/H2O solutions was investigated by atomic force microscopy. Rates of dissolution of different classes of surface features (e.g., steps, voids, and dislocation etch pits) were measured. The prismatic surface etched almost two orders of magnitude faster than the rhombohedral surface, mostly due to the difference in the number and the rate of dissolution of extended defects, such as dislocations. Because of the presence of imperfect twin boundaries, defect densities on the prismatic surface were estimated at 50-100 mu m(-2), whereas the rhombohedral surface possessed only similar to 0.5-1.0 mu m(-2), mostly in the form of crystal voids. Crystal voids etched almost one order of magnitude faster on the prismatic surface than on the rhombohedral surface due to differences in the number and the density of steps formed by voids on the different surfaces. In the absence of extended defects, both surfaces underwent step-wise dissolution at similar rates. Average rates of step retreat were comparable on both surfaces (similar to 3-5 nm/h on the prismatic surface and similar to 5-10 nm/h on the rhombohedral surface). Prolonged dissolution left the prismatic surface reshaped to a hill-and-valley morphology, whereas the rhombohedral surface dissolved to form coalescing arrays of oval-shaped etch pits. (c) 2005 Elsevier Inc. All rights reserved. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Yanina, SV (reprint author), Pacific NW Natl Lab, POB 999 K8-96, Richland, WA 99352 USA. EM svetlana.yanina@pnl.gov NR 41 TC 16 Z9 18 U1 1 U2 12 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAR 1 PY 2006 VL 70 IS 5 BP 1113 EP 1127 DI 10.1016/j.gca.2005.11.019 PG 15 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 020ZJ UT WOS:000235951700003 ER PT J AU Jimenez-Lopez, C Romanek, CS Caballero, E AF Jimenez-Lopez, C Romanek, CS Caballero, E TI Carbon isotope fractionation in synthetic magnesian calcite SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Article ID GROWTH-RATE; COEXISTING CALCITE; DELTA-C-13 VALUES; TOTAL PRESSURE; OXYGEN; DOLOMITE; DIOXIDE; PRECIPITATION; DELTA-O-18; SEAWATER AB Mg-calcite was precipitated at 25 degrees C in closed system, free-drift experiments, from solutions containing NaHCO3, CaCl2 and MgCl2. The carbon stable isotope composition of bulk solid and solution were analyzed from subsamples collected during time course experiments of 24 h duration. Considering only the Mg-content and delta C-13 values for the bulk solid, the carbon isotope fractionation factor for the Mg-calcite-HCO3(aq)- system (as 10(3) 1n alpha(-)(Mg-c1-HCO3(aq))) increased with average mol percentage of Mg (X-Mg) in the solid at a rate of (0.024 +/- 0.011) per mol% MgCO3. Extrapolation of this relationship to the pure calcite end member yields a value of 0.82 +/- 0.09, which is similar to published values for the calcite-HCO3(aq)-system. Although 10(3) 1n alpha(-)(Mg-c1-HCO3(aq)) did not vary for precipitation rates that ranged from 10(3.21) to 10(4.60) mu mol m(-2) h(-1), it was not possible to hold Mg-content of the solid constant, so kinetic effect on 10(3) 1n alpha could not be evaluated from these experiments. (c) 2005 Elsevier Inc. All rights reserved. C1 CSIC, Estac Expt Zaidin, E-18008 Granada, Spain. Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. Univ Georgia, Dept Geol, Aiken, SC 29802 USA. RP Jimenez-Lopez, C (reprint author), Univ Granada, Fac Ciencias, Dept Microbiol, Campus Fuentenueva S-N, E-18071 Granada, Spain. EM cjl@ugr.es NR 40 TC 19 Z9 19 U1 1 U2 11 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAR 1 PY 2006 VL 70 IS 5 BP 1163 EP 1171 DI 10.1016/j.gca.2005.11.005 PG 9 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 020ZJ UT WOS:000235951700006 ER PT J AU Owen, LA Caffee, MW Bovard, KR Finkel, RC Sharma, MC AF Owen, LA Caffee, MW Bovard, KR Finkel, RC Sharma, MC TI Terrestrial cosmogenic nuclide surface exposure dating of the oldest glacial successions in the Himalayan orogen: Ladakh Range, northern India SO GEOLOGICAL SOCIETY OF AMERICA BULLETIN LA English DT Article DE terrestrial cosmogenic nuclide; surface exposure dating; Transhimalaya; glacial geology; geochronology; Ladakh ID LATE QUATERNARY GLACIATIONS; PRODUCTION-RATES; NORTHWESTERN HIMALAYA; MOUNT EVEREST; ARABIAN SEA; SLIP RATES; BE-10; PAKISTAN; MONSOON; MORAINES AB Terrestrial cosmogenic nuclide surface exposure dating of moraine boulders and alluvial fan sediments define the timing of five glacial advances over at least the last five glacial cycles in the Ladakh Range of the Transhirnalaya. The glacial stages that have been identified are: the Indus Valley glacial stage, dated at older than 430 ka; the Leh glacial stage occurring in the penultiniate glacial cycle or older; the Kar glacial stage, occurring during the early part of the last glacial cycle; the Bazgo glacial stage, at its maximum during the middle of the last glacial cycle, and the early Holocene Khalling glacial stage. The exposure ages of the Indus Valley moraines are the oldest observed to date throughout the Himalayan orogen. We observe a pattern of progressively more restricted glaciation during the last five glacial cycles., likely indicating a progressive reduction in the moisture supply necessary to sustain glaciation. A possible explanation is that uplift of Himalayan ranges to the south and/or of the Karakoram Mountains to the west of the region may have effectively blocked moisture supply by the south Asian summer monsoon and mid-latitude westerlies, respectively. Alternatively, this pattern of glaciation may reflect a trend of progressively less extensive glaciation in mountain regions that has been observed globally throughout the Pleistocene. C1 Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA. Purdue Univ, Dept Phys, PRIME, W Lafayette, IN 47907 USA. Univ Calif Riverside, Dept Earth Sci, US Geol Survey, Riverside, CA 92521 USA. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. Jawaharlal Nehru Univ, Ctr Study Reg Dev, New Delhi 110067, India. RP Owen, LA (reprint author), Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA. EM lewis.owen@uc.edu RI Caffee, Marc/K-7025-2015 OI Caffee, Marc/0000-0002-6846-8967 NR 57 TC 91 Z9 97 U1 3 U2 12 PU GEOLOGICAL SOC AMERICA, INC PI BOULDER PA PO BOX 9140, BOULDER, CO 80301-9140 USA SN 0016-7606 J9 GEOL SOC AM BULL JI Geol. Soc. Am. Bull. PD MAR-APR PY 2006 VL 118 IS 3-4 BP 383 EP 392 DI 10.1130/B25750.1 PG 10 WC Geosciences, Multidisciplinary SC Geology GA 021DC UT WOS:000235962700009 ER PT J AU Briner, JP Miller, GH Davis, PT Finkel, RC AF Briner, JP Miller, GH Davis, PT Finkel, RC TI Cosmogenic radionuclides from fiord landscapes support differential erosion by overriding ice sheets SO GEOLOGICAL SOCIETY OF AMERICA BULLETIN LA English DT Review DE fjord; cosmogenic radionuclide; Laurentide Ice Sheet; weathering zone; glacier erosion; basal thermal regime ID LAST GLACIAL MAXIMUM; EASTERN BAFFIN-ISLAND; ARCTIC CANADA; NORTHWEST-TERRITORIES; HEINRICH EVENTS; FENNOSCANDIAN GLACIATION; PERIGLACIAL TRIMLINES; CONTINENTAL SHELVES; NORTHEAST SCOTLAND; WEATHERING ZONES AB The interpretation of differentially weathered mountainous areas along the fringes of Pleistocene ice sheets is fundamental for determining ice-sheet behavior and thickness during the last glaciation. Two existing interpretations are either that highly weathered uplands remained its nunataks while freshly eroded troughs held outlet glaciers during the last glaciation or that uplands and lowlands were equally covered by ice, but that it was differentially erosive as a function of its spatially variable basal thermal regime. Cosmogenic radionuclide measurements from 33 bedrock samples and 27 upland erratics front differentially weathered fiord landscapes on northeastern Baffin Island shed light on Laurentide Ice Sheet (LIS) dynamics and thickness. Tors on weathered upland surfaces have minimum Be-10 ages between ca. 50 and ca. 170 ka (n = 12), whereas the majority of erratics perched in the uplands range front ca. 10 to ca. 13 ka (n = 14), indicating that the whole landscape was glaciated during the Last Glacial Maximum (LGM). Glacially sculpted bedrock (n = 7) near sea level reflects the age of deglaciation, and increasing amounts of isotopic inheritance in high-elevation sculpted bedrock (n = 3), higher elevation intermediately weathered bedrock (n = 11), and highest elevation intensely weathered bedrock reflect the weakening of erosive power as the ice sheet transitioned from fiords to interfiord plateaus. Cold-based glaciation of uplands was contemporaneous with warm-based glaciation in fiords, suggesting the presence of ice streams. Al-26 and Be-10 concentrations measured in 10 bedrock samples indicate that tors have experienced a complex history of alternating periods of exposure, burial, and limited glacial erosion. The paired isotope data reveal a minimum duration of burial of 80-500 k.y., presumably by cold-based ice, and indicate that the tors have an age of at least 150-580 ka. These data, together with other reconstructions of ice streams in the eastern Canadian Arctic, suggest that ice streams were a large influence on northeastern LIS dynamics throughout the late Quaternary. Thus, the northeastern LIS was sensitively tied with North Atlantic thermohaline circulation and abrupt climate change. C1 Univ Colorado, INSTAAR, Boulder, CO 80303 USA. Bentley Coll, Dept Nat Sci, Waltham, MA 02454 USA. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. RP SUNY Buffalo, Dept Geol, Buffalo, NY 14260 USA. EM jbriner@buffalo.edu NR 124 TC 83 Z9 83 U1 1 U2 12 PU GEOLOGICAL SOC AMER, INC PI BOULDER PA PO BOX 9140, BOULDER, CO 80301-9140 USA SN 0016-7606 EI 1943-2674 J9 GEOL SOC AM BULL JI Geol. Soc. Am. Bull. PD MAR-APR PY 2006 VL 118 IS 3-4 BP 406 EP 420 DI 10.1130/B25716.1 PG 15 WC Geosciences, Multidisciplinary SC Geology GA 021DC UT WOS:000235962700011 ER PT J AU Li, YL Vali, H Yang, J Phelps, TJ Zhang, CL AF Li, YL Vali, H Yang, J Phelps, TJ Zhang, CL TI Reduction of iron oxides enhanced by a sulfate-reducing bacterium and biogenic H2S SO GEOMICROBIOLOGY JOURNAL LA English DT Article DE sulfate-reducing bacteria; iron oxides; enzymatic iron reduction; iron sulfide ID CRYSTALLINE IRON(III) OXIDES; ELEMENTAL SULFUR; DESULFOVIBRIO-DESULFURICANS; HYDROGEN-SULFIDE; ISOTOPE FRACTIONATION; MICROBIAL REDUCTION; URANIUM REDUCTION; DISSOLVED SULFIDE; FE(III) REDUCTION; MARINE-SEDIMENTS AB Interactions between bacteria and minerals at low temperatures often lead to accelerated alteration and transformation of mineral phases through dissolution and precipitation. Here we report the reductive dissolution of ferrihydrite, goethite, hematite, and magnetite by the sulfate-reducing bacterium Desulfovibrio desulfuricans strain G-20. The goal of this study was: (1) to investigate iron reduction by G-20 using iron as the sole electron acceptor and (2) to determine whether iron reduction could be enhanced during bacterial sulfate reduction. In the absence of sulfate, G-20 was capable of enzymatically reducing structural Fe3+ from different iron-oxide phases including ferrihydrite (4.6% of total iron reduced), goethite (5.3%), hematite (3.7%), magnetite (8.8%) and ferric citrate (23.0%). Enzymatic reduction of goethite and hematite was comparable to abiotic reduction by N2S using the same medium. Within 3 weeks, the maximum cells-density increased 13-fold in the magnetite culture and 5-fold in the ferric-citrate culture compared to cell densities at the beginning. In the presence of sulfate, iron reduction was significantly enhanced in all bacterial cultures. The amount of reduced iron was 64.3% of total iron for hematite, 73.9% for goethite, 97.3% for magnetite, and nearly 100% for ferric citrate and ferrihydrite after incubation for 156 hours. The accelerated dissolution of the iron oxides under sulfate-reducing conditions was due to strong interplay between cell growth and redox-reactions between ferric iron and biogenic sulfides. Analysis by transmission electron microscopy and electron-dispersion spectroscopy indicated extensive alteration of the crystals of goethite, hematite, and magnetite, and revealed changes in stoichiometry of iron sulfides after 1 year's incubation. C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29803 USA. McGill Univ, Dept Anat & Cell Biol, Montreal, PQ H3A 2B2, Canada. Lincoln Univ, Environm Res Ctr, Jefferson City, MO USA. Oak Ridge Natl Lab, Environm Sci Div, Oak Ridge, TN 37831 USA. RP Zhang, CL (reprint author), Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29803 USA. EM Zhang@SREL.edu RI Li, Yiliang/E-9916-2010; phelps, tommy/A-5244-2011; Vali, Hojatollah/F-3511-2012 OI Vali, Hojatollah/0000-0003-3464-9943 NR 65 TC 35 Z9 39 U1 4 U2 59 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 0149-0451 J9 GEOMICROBIOL J JI Geomicrobiol. J. PD MAR PY 2006 VL 23 IS 2 BP 103 EP 117 DI 10.1080/01490450500533965 PG 15 WC Environmental Sciences; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Geology GA 017RD UT WOS:000235709900004 ER PT J AU Constable, S Weiss, CJ AF Constable, S Weiss, CJ TI Mapping thin resistors and hydrocarbons with marine EM methods: Insights from 1D modeling SO GEOPHYSICS LA English DT Article ID ELECTRICAL-CONDUCTIVITY; MAGNETOTELLURIC DATA; INVERSION; EXPLORATION; ALGORITHM AB The use of marine controlled-source electromagnetic EM (CSEM) sounding to detect thin resistive layers at depths below the seafloor has been exploited recently to assess the resistivity of potential hydrocarbon reservoirs before drilling. We examine the sensitivity of the CSEM method to such layers with forward and inverse modeling in one and three dimensions. The 3D modeling demonstrates that if both source and receivers are over a tabular 3D target, 1D modeling predicts the observed response to very high accuracy. Experimental design can thus be based on 1D analysis in which hundreds of range and frequency combinations can be computed to find the optimal survey parameters for a given target structure. Modeling in three dimensions shows that the vertical electric-field response is largest over the edges of a 3D target. The 3D modeling also suggests that a target body needs to have a diameter twice the burial depth to be reliably seen by CSEM sounding. A simple air-wave model (energy propagating from Source to receiver via the atmosphere) allows the effects of the target layer and atmosphere to be separated and shows where sensitivity to the target is diminished or lost because of finite water depth as a function of range, frequency, and seafloor resistivity. Unlike DC resistivity sounding, the marine CSEM method is not completely T-equivalent and, in principle, can resolve resistivity and thickness separately. Smooth inversion provides an estimate of the method's resolving power and highlights the fact. that although the radial CSEM fields contain most of the sensitivity to the thin resistive target, inverted alone they produce only increasing resistivity with depth. Inclusion of the radial mode CSEM data forces the recovery of the thin resistor, but magnetotelluric data can be used more effectively to achieve the same result. C1 Scripps Inst Oceanog, La Jolla, CA 92093 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Constable, S (reprint author), Scripps Inst Oceanog, La Jolla, CA 92093 USA. EM sconstable@ucsd.edu; cjweiss@sandia.gov RI Constable, Steven/B-8959-2008 NR 28 TC 106 Z9 119 U1 3 U2 27 PU SOC EXPLORATION GEOPHYSICISTS PI TULSA PA 8801 S YALE ST, TULSA, OK 74137 USA SN 0016-8033 J9 GEOPHYSICS JI Geophysics PD MAR-APR PY 2006 VL 71 IS 2 BP G43 EP G51 DI 10.1190/1.2187748 PG 9 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 029DW UT WOS:000236539700014 ER PT J AU Smith, JT Morrison, HF AF Smith, JT Morrison, HF TI Approximating spheroid inductive responses using spheres SO GEOPHYSICS LA English DT Article AB Spheroid responses are important as limiting cases when modeling inductive responses of isolated metallic Objects Such as unexploded military ordnance. The response of high-permeability (mu(r) >= 50) conductive spheroids of moderate aspect ratios (0.25-4) to excitation by uniform magnetic fields in the axial or transverse direction is approximated by the response of spheres of appropriate diameters, of the same conductivity and permeability, with magnitude rescaled based oil the differing volumes, dc magnetizations, and high-frequency limit responses of the spheres and modelled spheroids. In the frequency domain, the scaled sphere responses agree within 5% of complex magnitudes for prolate spheroids and within 7% for oblate spheroids. The approximation is more accurate for source magnetic fields in the spheroid's shorter direction than in the spheroid's longer direction. In the time domain, the approximation describes spheroid responses over five decades of time after transmitter shutoff, With a maximum discrepancy of 20%. C1 Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Smith, JT (reprint author), Lawrence Berkeley Natl Lab, Div Earth Sci, 90-1116,1 Cyclotron Rd, Berkeley, CA 94720 USA. EM jt-smith@lbl.gov; HFMorrison@berkeley.edu NR 3 TC 4 Z9 4 U1 0 U2 2 PU SOC EXPLORATION GEOPHYSICISTS PI TULSA PA 8801 S YALE ST, TULSA, OK 74137 USA SN 0016-8033 J9 GEOPHYSICS JI Geophysics PD MAR-APR PY 2006 VL 71 IS 2 BP G21 EP G25 DI 10.1190/1.2187738 PG 5 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 029DW UT WOS:000236539700011 ER PT J AU Stauffer, PH AF Stauffer, PH TI Flux flummoxed: A proposal for consistent usage SO GROUND WATER LA English DT Editorial Material C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. RP Stauffer, PH (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, Mail Stop T003, Los Alamos, NM 87545 USA. EM stauffer@lanl.gov OI Stauffer, Philip/0000-0002-6976-221X NR 22 TC 10 Z9 10 U1 0 U2 4 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0017-467X J9 GROUND WATER JI Ground Water PD MAR PY 2006 VL 44 IS 2 BP 125 EP 128 DI 10.1111/j.1745-6584.2006.00197.x PG 4 WC Geosciences, Multidisciplinary; Water Resources SC Geology; Water Resources GA 017ZA UT WOS:000235730800002 PM 16556188 ER PT J AU Luo, J Wu, WM Fienen, MN Jardine, PM Mehlhorn, TL Watson, DB Cirpka, OA Criddle, CS Kitanidis, PK AF Luo, J Wu, WM Fienen, MN Jardine, PM Mehlhorn, TL Watson, DB Cirpka, OA Criddle, CS Kitanidis, PK TI A nested-cell approach for in situ remediation SO GROUND WATER LA English DT Article ID SCALE EVALUATION; GROUND-WATER; WELL PAIRS; INJECTION; BIOREMEDIATION; REDUCTION; AQUIFER; DESIGN; U(VI); ZONE AB We characterize the hydraulics of an extraction-injection well pair in arbitrarily oriented regional flow by the recirculation ratio, area, and average residence time in the recirculation zone. Erratic regional flow conditions may compromise the performance of the reactor between a single well pair. We propose an alternative four-well system: two downgradient extraction and two upgradient injection wells creating an inner cell nested within an outer cell. The outer cell protects the inner cell from the influence of regional flow. Compared to a two-well system, the proposed four-well system has several advantages: (1) the recirculation ratio within the nested inner cell is less sensitive to the regional flow direction; (2) a transitional recirculation zone between the inner and outer cells can capture flow leakage from the inner cell, minimizing the release of untreated contaminants; and (3) the size of the recirculation zone and residence times can be better controlled within the inner cell by changing the pumping rates. The system is applied at the Field Research Center in Oak Ridge, Tennessee, where experiments on microbial in situ reduction of uranium (VI) are under way. C1 Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. EAWAG, CH-8600 Dubendorf, Switzerland. RP Luo, J (reprint author), Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA. EM jianluo@stanford.edu RI Fienen, Michael/D-2479-2009; Cirpka, Olaf/C-7178-2008; Watson, David/C-3256-2016 OI Fienen, Michael/0000-0002-7756-4651; Cirpka, Olaf/0000-0003-3509-4118; Watson, David/0000-0002-4972-4136 NR 19 TC 40 Z9 41 U1 0 U2 8 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0017-467X J9 GROUND WATER JI Ground Water PD MAR PY 2006 VL 44 IS 2 BP 266 EP 274 DI 10.1111/j.1745-6584.2005.00106.x PG 9 WC Geosciences, Multidisciplinary; Water Resources SC Geology; Water Resources GA 017ZA UT WOS:000235730800021 PM 16556208 ER PT J AU Hubbell, JM Osiensky, JL Nicholl, MJ Sisson, JB AF Hubbell, JM Osiensky, JL Nicholl, MJ Sisson, JB TI A suction bailer for sampling very thin saturated zones SO GROUND WATER MONITORING AND REMEDIATION LA English DT Article ID CASING MATERIALS; WATER AB A suction bailer is developed for the express purpose of sampling very thin perched water bodies (on the order of 1 cm thick) that may also be ephemeral. This device incorporates a semi-permeable membrane on the bottom of the bailer that allows water entry, while simultaneously blocking air. This design allows unattended sample collection, which is monitored with a simple pressure transducer. Three prototypes were constructed and tested; one is based on a commercial suction lysimeter, while the other two are fabricated from stainless steel. All three prototypes were shown to be capable of sampling thin layers of water on the order of 1 cm thick and operating unattended for extended periods to capture intermittent events. Sample sizes of 100-1,000 mL are possible depending on fluid availability. The design does not place any constraints on the depth of emplacement. C1 Idaho Natl Lab, Dept Geosci, Idaho Falls, ID 83415 USA. Univ Idaho, Dept Geol Sci, Moscow, ID 83844 USA. Univ Nevada, Dept Geosci, Las Vegas, NV 89122 USA. RP Hubbell, JM (reprint author), Idaho Natl Lab, Dept Geosci, POB 1625,MS 2107, Idaho Falls, ID 83415 USA. EM joel.hubbell@inl.gov NR 16 TC 0 Z9 0 U1 2 U2 6 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 1069-3629 J9 GROUND WATER MONIT R JI Ground Water Monit. Remediat. PD SPR PY 2006 VL 26 IS 2 BP 52 EP 57 DI 10.1111/j.1745-6592.2006.00064.x PG 6 WC Water Resources SC Water Resources GA 043KY UT WOS:000237601200003 ER PT J AU Siegrist, RL Lowe, KS Crimi, ML Urynowicz, MA AF Siegrist, RL Lowe, KS Crimi, ML Urynowicz, MA TI Quantifying PCE and TCE in DNAPL source zones: Effects of sampling methods used for intact cores at varied contaminant levels and media temperatures SO GROUND WATER MONITORING AND REMEDIATION LA English DT Article AB An experimental study was completed to assess the impact of sampling methods, contaminant levels, and subsurface temperatures on the quantification of tetrachloroethylene (PCE) and trichloroethylene (TCE) in source zones contaminated by dense non-aqueous phase liquids (DNAPLs). Intact cores of clean aquifer solids (fine-grained uniform sand with low f(oc)) from a DNAPL site in Florida were spiked with neat PCE and TCE to yield concentrations such that DNAPL-phase contamination would be absent or present. Three methods characterized by different levels of media disaggregation and atmospheric exposure (MDE) were used to obtain samples from intact cores, which were at temperatures of 2 degrees C, 20 degrees C, and 38 degrees C. The results of this study demonstrated that sampling of intact cores can yield negative bias, ranging from 0% to 98% or more, in the concentrations of PCE and TCE measured. Larger negative bias was correlated with higher MDE methods, presumably due to elevated volatilization losses during sample collection and containerization. Larger negative bias was also correlated with higher temperatures but only during sampling using higher MDE methods. The results of this study suggest that intact core sampling procedures may or may not lead to erroneous conclusions about a DNAPL source zone. For example, sampling data may lead to a conclusion that a potential source zone has no DNAPL-phase contamination present when in fact it is present, or that remediation has achieved source zone cleanup to a residual concentration goal, when in fact the goal was not met. Conversely, if a remediation goal is to achieve a specified mass depletion level (e.g., 90%), measurement bias may not result in an erroneous conclusion. Further research is planned to examine a wider range of aquifer properties and sampling conditions and to assess the impacts of measurement errors on DNAPL source zone characterization and assessment of remediation performance. C1 Colorado Sch Mines, Golden, CO 80401 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. E Tennessee State Univ, Dept Environm Hlth, Johnson City, TN 37614 USA. Univ Wyoming, Laramie, WY 82071 USA. RP Siegrist, RL (reprint author), Colorado Sch Mines, Golden, CO 80401 USA. EM siegrist@mines.edu NR 15 TC 9 Z9 9 U1 0 U2 9 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 1069-3629 J9 GROUND WATER MONIT R JI Ground Water Monit. Remediat. PD SPR PY 2006 VL 26 IS 2 BP 114 EP 124 DI 10.1111/j.1745-6592.2006.00085.x PG 11 WC Water Resources SC Water Resources GA 043KY UT WOS:000237601200011 ER PT J AU Muksinova, K Kirillova, EN Zakharova, ML Revina, VS Neta, R AF Muksinova, K Kirillova, EN Zakharova, ML Revina, VS Neta, R TI A repository of bio-specimens from Mayak workers exposed to protracted radiation SO HEALTH PHYSICS LA English DT Article DE internal radiation; external radiation; exposure; occupational; nuclear workers ID NUCLEAR-COMPLEX; HUMAN LUNG AB A repository of bio-specimens that includes organs from 700 deceased workers employed at the first nuclear weapons facility "Mayak" and donations of blood, buccal cells, and tissues removed at the time of surgery and/or biopsy from the members of the Mayak cohort undergoing medical treatment or diagnostic procedures has been established at the Southern Ural Biophysics Institute, in Ozyorsk, Russian Federation. The autopsied tissues include formaline-preserved organs, paraffin blocks, and histology slides. For all, occupational, dosimetry, and detailed medical information is available. For 359 individuals, information on malignant tumors, i.e., lung (171), stomach (51), liver (28), and intestine (19), as well as 32 cases of leukemia, are available. External gamma exposures are known for 95% of the 700 autopsies, of whom 560 were exposed to protracted doses exceeding 0.5 Gy, with known maximum annual doses ranging from 0.01-0.5 Gy for about 46%, and annual doses exceeding 0.5 Gy for 48%. Plutonium body burden is known for 73%, of which 40% had body burden greater than 1.5 kBq, and 15% of individuals had body burdens greater than 11.85 kBq. Newly collected specimens include frozen lymphocytes, EBV-immortalized B-cells, frozen erythrocytes, and DNA as well as frozen tumors. Donations were obtained to date from more than 1,600 individuals. For these donors external doses of exposure exceeded 0.5 Gy for 83%, and plutonium body burden exceeded 1.48 kBq for 30%. C1 US DOE, Off Hlth Studies, Washington, DC 20585 USA. RP Neta, R (reprint author), US DOE, Off Hlth Studies, 1000 Independence Ave NW, Washington, DC 20585 USA. EM ruth.neta@eh.doe.gov NR 9 TC 2 Z9 10 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD MAR PY 2006 VL 90 IS 3 BP 263 EP 265 DI 10.1097/01.HP.0000175441.68227.ff PG 3 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 016DG UT WOS:000235600300009 PM 16505624 ER PT J AU Farber, DL Antonangeli, D Aracne, CM Benterou, J AF Farber, DL Antonangeli, D Aracne, CM Benterou, J TI Preparation and characterization of single crystal samples for high-pressure experiments SO HIGH PRESSURE RESEARCH LA English DT Article DE single crystal; polishing; laser cutting; diamond anvil cell ID X-RAY-DIFFRACTION; MEGABAR PRESSURES; IRON; GPA; HYDROGEN; GIGAPASCALS; ELASTICITY; STATE AB To date, most research utilizing the diamond anvil cell ( DAC) at very high pressure has been conducted with polycrystalline samples, thus the results are limited to addressing average bulk properties. However, experiments on single crystals can yield data on a range of orientation-dependent properties such as thermal and electrical conductivity, magnetic susceptibility, elasticity and plasticity. Here, we report new procedures to produce extremely high-quality metallic single crystal samples of size compatible with DAC experiments in the Mbar range. So far, we have produced samples of zinc, Al2O3, cobalt, molybdenum and cerium, and have evaluated the quality of the finished samples with white-light interferometry, synchrotron X-ray diffraction and inelastic X-ray scattering. C1 Lawrence Livermore Natl Lab, Div Earth Sci, Livermore, CA 94550 USA. Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064 USA. Lawrence Livermore Natl Lab, Elect Engn Directorate, Livermore, CA 94550 USA. RP Farber, DL (reprint author), Lawrence Livermore Natl Lab, Div Earth Sci, Livermore, CA 94550 USA. EM farber2@llnl.gov RI Farber, Daniel/F-9237-2011 NR 26 TC 11 Z9 11 U1 0 U2 8 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0895-7959 J9 HIGH PRESSURE RES JI High Pressure Res. PD MAR PY 2006 VL 26 IS 1 BP 1 EP 10 DI 10.1080/08957950500502531 PG 10 WC Physics, Multidisciplinary SC Physics GA 051JQ UT WOS:000238157800001 ER PT J AU Zerr, A Serghiou, G Boehler, R Ross, M AF Zerr, A Serghiou, G Boehler, R Ross, M TI Decomposition of alkanes at high pressures and temperatures SO HIGH PRESSURE RESEARCH LA English DT Article DE alkanes; methane; decomposition; high pressure; high temperature ID HEATED DIAMOND CELL; SHOCKED HYDROCARBONS; VIBRATIONAL DYNAMICS; ULTRAHIGH-PRESSURE; RAMAN MEASUREMENTS; MEGABAR PRESSURES; METHANE; HYDROGEN; GPA; CH4 AB The stability of methane ( CH4), ethane ( C2H6), octane ( C8H18), decane ( C10H22), octadecane ( C18H38), and nonadecane ( C19H40) were studied in a CO2-laser heated diamond anvil cell at pressures up to 25 GPa and temperatures up to about 7300 K. Methane and ethane were found to decompose to form hydrogen and diamond. Substantially greater yields of diamond were obtained from the longer chain alkanes. C1 Max Planck Inst Chem, D-55020 Mainz, Germany. Univ Paris 13, CNRS, Inst Galilee, Lab Proprietes Mecan & Thermodynam Mat, F-93430 Villetaneuse, France. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Zerr, A (reprint author), Max Planck Inst Chem, Postfach 3060, D-55020 Mainz, Germany. EM zerr@lpmtm.univ-paris13.fr NR 37 TC 16 Z9 17 U1 1 U2 12 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0895-7959 J9 HIGH PRESSURE RES JI High Pressure Res. PD MAR PY 2006 VL 26 IS 1 BP 23 EP 32 DI 10.1080/08957950600608931 PG 10 WC Physics, Multidisciplinary SC Physics GA 051JQ UT WOS:000238157800003 ER PT J AU Choo, JH Kim, JD Chung, JH Stubbs, L Kim, J AF Choo, JH Kim, JD Chung, JH Stubbs, L Kim, J TI Allele-specific deposition of macroH2A1 in imprinting control regions SO HUMAN MOLECULAR GENETICS LA English DT Article ID INACTIVE X-CHROMOSOME; HISTONE VARIANT MACROH2A; CALORIE RESTRICTION; BARR BODY; METHYLATION; BINDING; DOMAIN; GENE; IGF2; H19 AB In the current study, we analyzed the deposition patterns of macroH2A1 at a number of different genomic loci located in X chromosome and autosomes. MacroH2A1 is preferentially deposited at methylated CpG-rich regions located close to promoters. The macroH2A1 deposition patterns at the methylated CpG islands of several imprinted domains, including the imprinting control regions (ICRs) of Xist, Peg3, H19/Igf2, Gtl2/Dlk1 and Gnas domains, show consistent allele-specificity towards inactive, methylated alleles. The macroH2A1 deposition levels at the ICRs and other differentially methylated regions of these domains are also either higher or comparable to those observed at the inactive X chromosome of female mammals. Overall, our results indicate that besides DNA methylation macroH2A1 is another epigenetic component in the chromatin of ICRs displaying differential association with two parental alleles. C1 Louisiana State Univ, Dept Biol Sci, Ctr BioModular Multiscale Syst, Baton Rouge, LA 70803 USA. Korea Adv Inst Sci & Technol, Dept Biol Sci, Taejon 305701, South Korea. Lawrence Livermore Natl Lab, Gen Biol Div, Livermore, CA 94551 USA. RP Kim, J (reprint author), Louisiana State Univ, Dept Biol Sci, Ctr BioModular Multiscale Syst, Baton Rouge, LA 70803 USA. EM jkim@lsu.edu OI Stubbs, Lisa/0000-0002-9556-1972 FU NIGMS NIH HHS [R01 GM066225, R01 GM66225] NR 35 TC 33 Z9 34 U1 0 U2 2 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0964-6906 J9 HUM MOL GENET JI Hum. Mol. Genet. PD MAR 1 PY 2006 VL 15 IS 5 BP 717 EP 724 DI 10.1093/hmg/ddi485 PG 8 WC Biochemistry & Molecular Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Genetics & Heredity GA 013TQ UT WOS:000235432900005 PM 16421169 ER PT J AU Habib, IW Song, Q Li, ZM Rao, NSV AF Habib, IW Song, Q Li, ZM Rao, NSV TI Deployment of the GMPLS control plane for grid applications in experimental high-performance networks SO IEEE COMMUNICATIONS MAGAZINE LA English DT Article AB In this article we present a review of the latest activities in recent experimental high-performance optical networks such as UltraScience Network (USN), Dynamic Resource Allocation via GMPLS Optical Network (DRAGON), and Circuit-Switched High-Speed End-to-End Transport Architecture (CHEETAH). We compare the control and management approaches adopted in each of these networks and analyze their capabilities vis-a-vis the functional requirements of grid computing applications. Grid computing is increasingly on the rise to meet the massive processing and storage demands of a new class of e-science physics applications that may generate and require the processing of data sets reaching terabytes per day. The requirements of these applications challenge the limitations of the networking technologies that are in place today. In particular, the area of network management and control is undergoing significant developments in order to meet the demands of these applications. It is the purpose of this article to share our experiences in the deployment of the GMPLS control plane in these experimental optical networks. It is our belief that these and similar efforts will result in significant progress toward enabling connect ion-oriented high-performance networking. This new paradigm will encompass grid computing applications as well as commercial, health, and entertainment services, thus making it useful to the public at large. C1 CUNY, Dept Elect Engn, Grad Ctr, New York, NY 10021 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. RP Habib, IW (reprint author), CUNY, Dept Elect Engn, Grad Ctr, New York, NY 10021 USA. EM habib@ccny.cuny.edu; qsong@ccny.cuny.edu; zli@ccny.cuny.edu; raons@ornl.gov OI Rao, Nageswara/0000-0002-3408-5941 NR 9 TC 15 Z9 16 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0163-6804 J9 IEEE COMMUN MAG JI IEEE Commun. Mag. PD MAR PY 2006 VL 44 IS 3 BP 65 EP 73 DI 10.1109/MCOM.2006.1607868 PG 9 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA 020GI UT WOS:000235896300009 ER PT J AU McCown, F Nelson, ML Zubair, M Liu, XM AF McCown, F Nelson, ML Zubair, M Liu, XM TI Search engine coverage of the OAI-PMH corpus SO IEEE INTERNET COMPUTING LA English DT Article AB Having indexed much of the "surface" Web, search engines are now using various approaches to index the "deep" Web. At the same time, institutional repositories and digital libraries are adopting the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) to expose their holdings. The authors harvested nearly 10 million records from OAI-PMH repositories. From these records, they extracted 3.3 million unique resource URLs and then conducted searches on samples from this collection to determine how much of the OAI-PMH corpus the three major search engines have indexed. C1 Old Dominion Univ, Norfolk, VA 23529 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP McCown, F (reprint author), Old Dominion Univ, Norfolk, VA 23529 USA. EM fmccown@cs.odu.edu; mln@cs.odu.edu; zubair@cs.odu.edu; liu_x@lanl.gov OI Nelson, Michael/0000-0003-3749-8116 NR 13 TC 13 Z9 13 U1 1 U2 3 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA SN 1089-7801 J9 IEEE INTERNET COMPUT JI IEEE Internet Comput. PD MAR-APR PY 2006 VL 10 IS 2 BP 66 EP 73 DI 10.1109/MIC.2006.41 PG 8 WC Computer Science, Software Engineering SC Computer Science GA 018AV UT WOS:000235736000009 ER PT J AU Waldmueller, I Chow, WW Young, EW Wanke, MC AF Waldmueller, I Chow, WW Young, EW Wanke, MC TI Nonequilibrium many-body theory of intersubband lasers SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article DE intersubband semiconductor laser; nonequilibrium laser dynamics; microscopic scattering; relaxation rate approximation ID QUANTUM-CASCADE LASERS; HOT-CARRIER RELAXATION; MICROSCOPIC THEORY; SCATTERING; TRANSPORT; TEMPERATURE; PERFORMANCE; DEPENDENCE; MODEL; WELL AB We present a theory for intersubband lasers, based on the solution of the Maxwell-semiconductor Bloch equations for the laser field and active medium. The collision contributions are treated within the relaxation rate approximation, where the relaxation rates are determined by microscopic scattering calculations. The theory is suitable for investigating steady-state as well as dynamical laser characteristics. As examples of applications of the theory, we examine the thermal dependence of the laser output versus current density curve and the response to modulation of the injection current, for a three-subband laser. The influence of the nonparabolicity of the conduction band and Hartree-Fock many-body effects are investigated. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM iwaldmu@sandia.gov; wwchow@sandia.gov; ewyoung@sandia.gov; mcwanke@sandia.gov RI Montano, Ines/I-7497-2012 NR 32 TC 28 Z9 28 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 0018-9197 EI 1558-1713 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD MAR-APR PY 2006 VL 42 IS 3-4 BP 292 EP 301 DI 10.1109/JQE.2006.869813 PG 10 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA 030ZN UT WOS:000236674000009 ER PT J AU Devgan, P Serkland, D Keeler, G Geib, K Kumar, P AF Devgan, P Serkland, D Keeler, G Geib, K Kumar, P TI An optoelectronic oscillator using an 850-nm VCSEL for generating low jitter optical pulses SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article DE 850-nm vertical-cavity surface-emitting laser (VCSEL); optical pulses; optoelectronic oscillator (OEO); self-starting pulse source; timing jitter ID NOISE; LASERS AB We demonstrate an optoelectronic oscillator using a gain-switched vertical-cavity surface-emitting laser in a fiber-feedback configuration. We simultaneously generate a 2-GHz optical pulse stream at 850 nm with 750-fs timing jitter (over 100 Hz-10 MHz range) along with an electrical signal that is locked to the repetition rate of the optical pulses. The timing jitter performance is confirmed by measuring higher harmonic phase noise. C1 Northwestern Univ, Dept Elect Engn & Comp Sci, Ctr Photon Commun & Comp, Evanston, IL 60208 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Devgan, P (reprint author), Northwestern Univ, Dept Elect Engn & Comp Sci, Ctr Photon Commun & Comp, Evanston, IL 60208 USA. EM p-devgan@northwestern.edu RI Kumar, Prem/B-6691-2009 NR 13 TC 14 Z9 15 U1 0 U2 7 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD MAR-APR PY 2006 VL 18 IS 5-8 BP 685 EP 687 DI 10.1109/LPT.2006.870068 PG 3 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA 035CL UT WOS:000236977500012 ER PT J AU Bishop, M Frincke, DA AF Bishop, M Frincke, DA TI Who owns your computer? SO IEEE SECURITY & PRIVACY LA English DT Article C1 Univ Calif Davis, Davis, CA 95616 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Bishop, M (reprint author), Univ Calif Davis, Davis, CA 95616 USA. EM bishop@cs.ucdavis.edu; deborah.frincke@pnl.gov NR 7 TC 2 Z9 2 U1 1 U2 1 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA SN 1540-7993 J9 IEEE SECUR PRIV JI IEEE Secur. Priv. PD MAR-APR PY 2006 VL 4 IS 2 BP 61 EP 63 DI 10.1109/MSP.2006.56 PG 3 WC Computer Science, Information Systems; Computer Science, Software Engineering SC Computer Science GA 029JK UT WOS:000236558300008 ER PT J AU Chowdhuri, P Pallem, C Demko, JA Gouge, MJ AF Chowdhuri, P Pallem, C Demko, JA Gouge, MJ TI Analysis on the transient voltage performance of a DC superconducting cable SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article DE DC superconducting cable; transient voltages ID WAVE-PROPAGATION AB Transient voltage distribution in a de superconducting cable, comprising of four concentric metallic cylinders was analyzed. Of the four concentric cylinders, two carry the load current, and the other two comprise the cryogenic enclosure. Analysis was performed with transient current injected either to the innermost or the outermost cylinder. The outermost cylinder was either bare or insulated. The outer three cylinders were either solidly grounded or isolated from ground at the point of current injection. It was concluded that transient voltages will appear across the RETURN cryogen flow and also across the vacuum space in the cryogenic enclosure. As these two systems are designed for their thermal performance, they may suffer permanent damage caused by unwanted electrical transients. C1 Tennessee Technol Univ, Ctr Energy Syst Res, Cookeville, TN 38505 USA. Oak Ridge Natl Lab, Appl Superconduct Grp, Oak Ridge, TN 37831 USA. RP Chowdhuri, P (reprint author), Tennessee Technol Univ, Ctr Energy Syst Res, Cookeville, TN 38505 USA. EM pchowdhuri@tntech.edu; cpallem21@tntech.edu; demkoja@ornl.gov; gougemj@ornl.gov NR 9 TC 0 Z9 0 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 2006 VL 16 IS 1 BP 21 EP 30 DI 10.1109/TASC.2005.863517 PG 10 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 024QQ UT WOS:000236211500005 ER PT J AU Pallem, C Chowdhuri, P Demko, JA Gouge, MJ AF Pallem, C Chowdhuri, P Demko, JA Gouge, MJ TI Parametric effects on the transient voltage performance of a DC superconducting cable SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article DE DC superconducting cable; transient voltages AB The objective of this work was to determine the significant parameters of a 3-GW 200-kV dc superconducting cable system which influence the transient voltage distribution in the various parts of the cable. The cable system consists of four coaxial metallic cylinders. It was found that the dielectric constant and the electrical resistivity of the soil significantly affect the severity of the transient voltages; lower dielectric constant and higher resistivity of the soil will increase the magnitudes of the transient voltages by increasing the earth-return impedance. It was also found that the effect of the conductor internal impedances of the cable is insignificant. Shorting the coaxial cylinders of the cryogen How and the cryostat will lessen the severity of the transient voltages. Grounding the second, third, and fourth cylinders at regular intervals with low-impedance grounding impedance will also improve the transient performance of the cable. More research is needed to evaluate these procedures. C1 Tennessee Technol Univ, Ctr Elect Power, Cookeville, TN 38505 USA. Oak Ridge Natl Lab, Appl Superconduct Grp, Oak Ridge, TN 37831 USA. RP Pallem, C (reprint author), Tennessee Technol Univ, Ctr Elect Power, Cookeville, TN 38505 USA. EM cpallem21@tntech.edu; pchowdhuri@tntech.edu; demkoja@ornl.gov; gougemj@ornl.gov NR 2 TC 2 Z9 2 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 2006 VL 16 IS 1 BP 31 EP 37 DI 10.1109/TASC.2005.863519 PG 7 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 024QQ UT WOS:000236211500006 ER PT J AU Theiler, J Alper, J AF Theiler, J Alper, J TI On the choice of random directions for stochastic approximation algorithms SO IEEE TRANSACTIONS ON AUTOMATIC CONTROL LA English DT Article DE finite difference; random direction; simultaneous perturbation; stochastic approximation ID PERTURBATION GRADIENT APPROXIMATION; OPTIMIZATION AB Stochastic approximation provides a simple and effective approach for finding roots and minima of functions whose evaluations are contaminated with noise. We investigate variants of the random direction stochastic approximation (RDSA) algorithm for optimizing noisy loss functions in high-dimensional spaces. The most popular variant is random selection from a Bernoulli distribution, which also goes by the name simultaneous perturbation stochastic approximation (SPSA). Viable alternatives include an axis-aligned distribution, normal distribution, and uniform distribution on a spherical shell. Although there are special cases where the Bernoulli distribution is optimal, we identify other cases where it performs worse than the alternatives. We show that performance depends on the orientation of the loss function with respect to its coordinate axes, and consider averages over all orientations. We find that the average asymptotic performance depends only on the radial fourth moment of the distribution of random directions, and is identical for the Bernoulli, axis-aligned, and spherical shell distributions. Of these variants, the spherical shell is optimal in the sense of minimum variance over random orientations of the loss function with respect to the coordinate axes. We also show that for unaligned loss functions, the performance of the Kiefer-Wolfowitz-Blum finite difference stochastic approximation (FDSA) is asymptotically equivalent to the RDSA algorithms, and we observe numerically that the pre-asymptotic performance of FDSA is often superior. C1 Los Alamos Natl Lab, Space & Remote Sensing Sci Grp, Los Alamos, NM 87545 USA. RP Theiler, J (reprint author), Los Alamos Natl Lab, Space & Remote Sensing Sci Grp, MS B244, Los Alamos, NM 87545 USA. EM jt@lanl.gov; jarod@math.stanford.edu NR 9 TC 7 Z9 8 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9286 J9 IEEE T AUTOMAT CONTR JI IEEE Trans. Autom. Control PD MAR PY 2006 VL 51 IS 3 BP 476 EP 481 DI 10.1109/TAC.2005.864195 PG 6 WC Automation & Control Systems; Engineering, Electrical & Electronic SC Automation & Control Systems; Engineering GA 022KQ UT WOS:000236055100009 ER PT J AU Hilt, MJ Vincent, TL Joshi, BS Simpson, LJ AF Hilt, MJ Vincent, TL Joshi, BS Simpson, LJ TI Estimating relative deposition rates in a multi-source continuous-deposition process using a single composition sensor SO IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY LA English DT Article DE experiment design; identification; parameter estimation; thin films; vapor deposition ID FILM SOLAR-CELLS AB When only a single composition sensor is available for a multi-zone co-evaporation process, it can be difficult to determine the relative amount of material deposited in each zone. In this paper, a method of estimating the deposition-rate ratio between zones using small signal perturbation sequences is presented that exploits the exponential dependence of deposition rate on the temperature of the molten metal. A quality metric for the ratio estimate is presented, which can be easily calculated. Then, in order to determine the best perturbation sequence that meets all manufacturing constraints, a constrained optimization problem is described that is shown to be convex. An interesting feature of the solution is the importance of correlations between purturbation inputs. Experimental and simulation results are presented to validate the method. C1 Numer Corp, Ft Collins, CO 80525 USA. Colorado Sch Mines, Div Engn, Golden, CO 80401 USA. Univ N Carolina, Dept Elect & Comp Engn, Charlotte, NC 28223 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Hilt, MJ (reprint author), Numer Corp, Ft Collins, CO 80525 USA. EM tvincent@mines.edu; bsjoshi@uncc.edu; Lin_Simpson@nrel.gov RI Vincent, Tyrone/A-8923-2013 NR 13 TC 3 Z9 3 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1063-6536 J9 IEEE T CONTR SYST T JI IEEE Trans. Control Syst. Technol. PD MAR PY 2006 VL 14 IS 2 BP 247 EP 259 DI 10.1109/TCST.2005.0863651 PG 13 WC Automation & Control Systems; Engineering, Electrical & Electronic SC Automation & Control Systems; Engineering GA 018HH UT WOS:000235754500006 ER PT J AU El-Refaie, AA Jahns, TM McCleer, PJ McKeever, JW AF El-Refaie, AA Jahns, TM McCleer, PJ McKeever, JW TI Experimental verification of optimal flux weakening in surface PM machines using concentrated windings SO IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS LA English DT Article; Proceedings Paper CT 40th Annual Meeting of the IEEE-Industry-Applications-Society CY OCT 02-06, 2005 CL Hong Kong, PEOPLES R CHINA SP IEEE Ind Applicat Soc DE concentrated; experimental; flux weakening; fractional slot; permanent magnet; surface; synchronous; verification; windings ID PERMANENT-MAGNET MACHINES AB Previous analytical work has shown that it is possible to design surface permanent-magnet (SPM) machines using fractional-slot concentrated windings to achieve wide speed ranges of constant power operation by satisfying the optimal flux-weakening condition. This paper presents a 6-kW 36-slot/30-pole concentrated winding prototype SPM machine that has been designed using a closed-form analytical technique developed specifically for this class of machines. Experimental testing of this machine has been carried out to determine its performance capabilities, including flux-weakening operation. Detailed comparisons between analytical, finite-element analysis (FEA), and experimental results are presented, which confirm the ability of fractional-slot concentrated winding SPM machines to achieve their high-speed operating objectives. Important issues including the machine's back EMF voltage at top speed, eddy-current losses in the magnets, and inverter performance are analyzed and discussed in detail. C1 Univ Wisconsin, Dept Elect & Comp Engn, Madison, WI 53706 USA. McCleer Power Inc, Jackson, MI 49203 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP GE Global Res Ctr, Elect Machines & Drives Lab, Moscow 123098, Russia. EM elrefaie@research.ge.com; jahns@engr.wisc.edu; pat@mccleerpower.com; mckeeverjw@ornl.gov NR 21 TC 92 Z9 95 U1 0 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 0093-9994 EI 1939-9367 J9 IEEE T IND APPL JI IEEE Trans. Ind. Appl. PD MAR-APR PY 2006 VL 42 IS 2 BP 443 EP 453 DI 10.1109/TIA.2006.870043 PG 11 WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic SC Engineering GA 027DT UT WOS:000236394600012 ER PT J AU Rivetta, CH Emadi, A Williamson, GA Jayabalan, R Fahimi, B AF Rivetta, CH Emadi, A Williamson, GA Jayabalan, R Fahimi, B TI Analysis and control of a buck DC-DC converter operating with constant power load in sea and undersea vehicles SO IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS LA English DT Article; Proceedings Paper CT 39th Annual Meeting of the IEEE-Industry-Applications-Society CY OCT 03-07, 2004 CL Seattle, WA SP IEEE Ind Applicat Soc DE buck converter; constant power loads; control; dc-dc converters; modeling and analysis; sea and undersea vehicles ID SYSTEM AB Power-electronics-based zonal direct current (dc) power distribution systems are being considered for sea and undersea vehicles. The stability of the dc power-electronics-based power distribution systems is a significant design consideration because of the potential for negative-impedance-induced instabilities. In this paper, the dynamic properties and control of a buck converter feeding a downstream dc-dc converter are studied. The controller in this system combines an instantaneous current feedback loop using hysteresis with a proportional-integral (PI) algorithm to regulate the output voltage of the converter. Based on a large-signal-averaged model of the converter, the stability-in-large around the operation point is presented. The complete analysis is carried out considering a buck dc-dc converter operating with a constant power load (CPL). Simulations and experimental results are provided to verify the analysis. C1 IIT, Dept Elect & Comp Engn, Chicago, IL 60616 USA. Univ Texas, Dept Elect & Comp Engn, Arlington, TX 76019 USA. RP Rivetta, CH (reprint author), Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. EM rivetta@slac.stanford.edu; emadi@iit.edu; fahimi@uta.edu NR 27 TC 64 Z9 68 U1 0 U2 8 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 MAR-APR PY 2006 VL 42 IS 2 BP 559 EP 572 DI 10.1109/TIA.2005.863903 PG 14 WC Engineering, Multidisciplinary; Engineering, Electrical & Electronic SC Engineering GA 027DT UT WOS:000236394600025 ER PT J AU Ma, XS Lee, J Winslett, M AF Ma, XS Lee, J Winslett, M TI High-level buffering for hiding periodic output cost in scientific simulations SO IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS LA English DT Article DE parallel I/O library design; performance optimization; experimentation AB Scientific applications often need to write out large arrays and associated metadata periodically for visualization or restart purposes. In this paper, we present active buffering, a high-level transparent buffering scheme for collective I/O, in which processors actively organize their idle memory into a hierarchy of buffers for periodic output data. It utilizes idle memory on the processors, yet makes no assumption regarding runtime memory availability. Active buffering can perform background I/O while the computation is going on, is extensible to remote I/O for more efficient data migration, and can be implemented in a portable style in today's parallel I/O libraries. It can also mask performance problems of scientific data formats used by many scientists. Performance experiments with both synthetic benchmarks and real simulation codes on multiple platforms show that active buffering can greatly reduce the visible I/O cost from the application's point of view. C1 N Carolina State Univ, Dept Comp Sci, Raleigh, NC 27695 USA. Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. Univ Illinois, Dept Comp Sci, Urbana, IL 61801 USA. RP Ma, XS (reprint author), N Carolina State Univ, Dept Comp Sci, Campus Box 7534, Raleigh, NC 27695 USA. EM jna@cs.ncsu.edu; jlee@mcs.atil.gov; winslett@cs.uiuc.edu NR 27 TC 8 Z9 8 U1 0 U2 1 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA SN 1045-9219 J9 IEEE T PARALL DISTR JI IEEE Trans. Parallel Distrib. Syst. PD MAR PY 2006 VL 17 IS 3 BP 193 EP 204 DI 10.1109/TPDS.2006.36 PG 12 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA 014AQ UT WOS:000235451500001 ER PT J AU McKnight, TE Melechko, AV Griffin, GD Simpson, ML AF McKnight, T. E. Melechko, A. V. Griffin, G. D. Simpson, M. L. TI Plant tissue transformation using periodic arrays of vertically aligned carbon nanofibers. SO IN VITRO CELLULAR & DEVELOPMENTAL BIOLOGY-ANIMAL LA English DT Meeting Abstract C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM mcknightte@orn1.gov RI Melechko, Anatoli/B-8820-2008; Simpson, Michael/A-8410-2011; McKnight, Tim/H-3087-2011 OI Simpson, Michael/0000-0002-3933-3457; McKnight, Tim/0000-0003-4326-9117 NR 0 TC 3 Z9 3 U1 0 U2 0 PU SOCIETY IN VITRO BIOLOGY PI RALEIGH PA 514 DANIELS STREET, STE 411, RALEIGH, NC 27605 USA SN 1071-2690 J9 IN VITRO CELL DEV-AN JI In Vitro Cell. Dev. Biol.-Anim. PD SPR PY 2006 VL 42 SU S BP 17A EP 17A PG 1 WC Cell Biology; Developmental Biology SC Cell Biology; Developmental Biology GA 106VF UT WOS:000242129400060 ER PT J AU Li, XS Courtney, AR Yantasee, W Mattigod, SV Fryxell, GE AF Li, XS Courtney, AR Yantasee, W Mattigod, SV Fryxell, GE TI Templated synthesis of mesoporous titanium phosphates for the sequestration of radionuclides SO INORGANIC CHEMISTRY COMMUNICATIONS LA English DT Article DE mesoporous; metal phosphate; sorbent; radionuclide; synthesis ID MOLECULAR-SIEVES; HYDROTHERMAL SYNTHESIS; ZIRCONIUM PHOSPHATE AB Several mesoporous titanium phosphate phases, with varying pore sizes, were prepared using non-ionic surfactants and easily handled titanium precursors under mild reaction conditions. Preliminary testing reveals that these materials have high affinity for certain radionuclides of environmental concern. (C) 2005 Elsevier B.V. All rights reserved. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Fryxell, GE (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. EM glen.fryxell@pnl.gov NR 10 TC 16 Z9 17 U1 2 U2 16 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1387-7003 J9 INORG CHEM COMMUN JI Inorg. Chem. Commun. PD MAR PY 2006 VL 9 IS 3 BP 293 EP 295 DI 10.1016/j.inoche.2005.11.014 PG 3 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 019CX UT WOS:000235814300011 ER PT J AU Yoo, YK Xue, QZ Chu, YS Xu, SF Hangen, U Lee, HC Stein, W Xiang, XD AF Yoo, YK Xue, QZ Chu, YS Xu, SF Hangen, U Lee, HC Stein, W Xiang, XD TI Identification of amorphous phases in the Fe-Ni-Co ternary alloy system using continuous phase diagram material chips SO INTERMETALLICS LA English DT Article DE ternary alloy systems; glasses; metallic; phase diagrams; thin films AB In conventional bulk alloy phase diagrams, each discrete composition point is prepared and characterized one at a time, and consequently has a different thermodynamic history. The continuous phase diagram (CPD) offers a unique opportunity to conduct high throughput construction of thin film phase diagram with single universal thermodynamic history applied to all the compositions. Here, we performed the CPD experiment of Fe-Ni-Co ternary alloy system using combinatorial ion beam sputtering system. The high throughput screenings of structural and physical properties were made using scanning microbeam X-ray diffractometer, scanning magneto-optic Kerr effect (SMOKE) measurement, and scanning nano-indentation microscope. The results are consistent with the known structural phases and phase boundaries. In addition, we identified two very narrow amorphous regions, carefully examined and confirmed by synchrotron microbeam X-ray diffraction studies. (c) 2005 Published by Elsevier Ltd. C1 Intematix Corp, Moraga, CA 94556 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. SRI Int, Menlo Pk, CA 94025 USA. SURFACE, NanoLab, D-41836 Hueckelhoven, Germany. RP Xiang, XD (reprint author), Intematix Corp, 351 Rheem Blvd, Moraga, CA 94556 USA. EM xdxiang@intematix.com RI Xiang, Xiaodong/A-9445-2012; Xiang, Xiaodong/A-5936-2017 NR 18 TC 12 Z9 17 U1 3 U2 12 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0966-9795 J9 INTERMETALLICS JI Intermetallics PD MAR PY 2006 VL 14 IS 3 BP 241 EP 247 DI 10.1016/j.internet.2005.05.013 PG 7 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 995IJ UT WOS:000234093700003 ER PT J AU Donde, V Hiskens, IA AF Donde, V Hiskens, IA TI Shooting methods for locating grazing phenomena in hybrid systems SO INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS LA English DT Article DE grazing; limit cycles; piecewise smooth dynamical systems; shooting methods; continuation methods ID BORDER-COLLISION BIFURCATIONS; THYRISTOR CONTROLLED REACTOR; SWITCHING TIME BIFURCATIONS; SENSITIVITY-ANALYSIS; IMPACT OSCILLATORS AB Hybrid systems are typified by strong coupling between continuous dynamics and discrete events. For such piecewise smooth systems, event triggering generally has a significant influence over subsequent system behavior. Therefore, it is important to identify situations where a small change in parameter values alters the event triggering pattern. The bounding case, which separates regions of (generally) quite different dynamic behaviors, is referred to as grazing. At a grazing point, the system trajectory makes tangential contact with an event triggering hypersurface. The paper formulates conditions governing grazing points. Both transient and periodic behaviors are considered. The resulting boundary value problems are solved using shooting methods that are applicable for general nonlinear hybrid (piecewise smooth). dynamical systems. The grazing point formulation underlies the development of a continuation process for exploring parametric dependence. It also provides the basis for an optimization technique that finds the smallest parameter change necessary to induce grazing. Examples are drawn from power electronics, power systems and robotics, all of which involve intrinsic interactions between continuous dynamics and discrete events. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Wisconsin, Dept Elect & Comp Engn, Madison, WI 53706 USA. RP Donde, V (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM VDonde@lbl.gov; hiskens@engr.wisc.edu NR 39 TC 21 Z9 21 U1 0 U2 4 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0218-1274 J9 INT J BIFURCAT CHAOS JI Int. J. Bifurcation Chaos PD MAR PY 2006 VL 16 IS 3 BP 671 EP 692 DI 10.1142/S0218127406015040 PG 22 WC Mathematics, Interdisciplinary Applications; Multidisciplinary Sciences SC Mathematics; Science & Technology - Other Topics GA 047SX UT WOS:000237900100009 ER PT J AU Srinivasan, NK Michael, JV AF Srinivasan, NK Michael, JV TI The thermal decomposition of water SO INTERNATIONAL JOURNAL OF CHEMICAL KINETICS LA English DT Article ID REFLECTED SHOCK-WAVES; COLLISION RATE CONSTANTS; FALL-OFF RANGE; UNIMOLECULAR REACTIONS; HIGH-TEMPERATURE; OH RADICALS; TUBE; KINETICS; RECOMBINATION; DISSOCIATION AB The reflected shock tube technique with multipass absorption spectrometric detection of OH-radicals at 308 nm, corresponding to a total path length of 1.749 m, has been used to study the reaction H2O + M -> H + OH + M between 2196 and 2792 K using 0.3, 0.5, and 1% H2O, diluted in Kr. As a result of the increased sensitivity for OH-radical detection, the existing database for this reaction could be extended downward by similar to 500 K. Combining the present work with that of Homer and Hurle, the composite rate expression for water dissociation in either Ar or Kr bath gas is k(1,Ar(orKr)) =(2.43 +/- 0.57)x 10(-10) exp(-47117 +/- 633K/T) cm(3) molecule(-1) s(-1) over the T-range of 2196-3290 K. Applying the Troe factorization method to data for both forward and reverse reactions, the rate behavior could be expressed to within <+/- 18% over the T-range. 300-3400 K, by the three-parameter expression k(1.Ar) = 1.007 x 10(4) T-3.322 exp(-60782 K/T) cm(3) molecule(-1) s(-1) A large enhancement due to H2O with H2O collisional activation has been noted previously, and both absolute and relative data have been considered allowing us to suggest k(1,H2O) = 1.671 x 10(2) T-2.440 exp(-60475 K/T) cm(3) molecule(-1) s(-1) for the rate constants with H2O bath gas over the T-range, 300-3400 K. (c) 2006 Wiley Periodicals, Inc. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Michael, JV (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. EM jmichael@anl.gov RI Michael, Joe/E-3907-2010 NR 32 TC 32 Z9 32 U1 0 U2 19 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0538-8066 J9 INT J CHEM KINET JI Int. J. Chem. Kinet. PD MAR PY 2006 VL 38 IS 3 BP 211 EP 219 DI 10.1002/kin.20172 PG 9 WC Chemistry, Physical SC Chemistry GA 018TF UT WOS:000235787000008 ER PT J AU Barenblatt, GI AF Barenblatt, G. I. TI Scaling phenomena in fatigue and fracture SO INTERNATIONAL JOURNAL OF FRACTURE LA English DT Article; Proceedings Paper CT 11th International Conference on Fracture CY MAR 20-25, 2005 CL Torino, ITALY SP Italian Govt, Minist Infrastructures transport, Natl Sci Fdn Italy DE fracture-advanced similarity analysis; fatigue-advanced similarity analysis; scaling laws in fatigue; scaling laws in fracture; incomplete similarity; pan's law; fracture-cracks; fatigue-cracks; dynamic cracks ID COHESIVE CRACK MODEL; GROWTH; STRENGTH; STEEL AB The general classification of scaling laws will be presented and the basic concepts of modern similarity analysis - intermediate asymptotics, complete and incomplete similarity - will be introduced and discussed. The examples of scaling laws corresponding to complete similarity will be given. The Paris scaling law in fatigue will be discussed as an instructive example of incomplete similarity. It will be emphasized that in the Paris law the powers are not the material constants. Therefore, the evaluation of the life-time of structures using the data obtained from standard fatigue tests requires some precautions. C1 Univ Calif Berkeley, Dept Math, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Barenblatt, GI (reprint author), Univ Calif Berkeley, Dept Math, Berkeley, CA 94720 USA. EM gibar@math.berkeley.edu NR 41 TC 20 Z9 24 U1 1 U2 17 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0376-9429 J9 INT J FRACTURE JI Int. J. Fract. PD MAR-APR PY 2006 VL 138 IS 1-4 BP 19 EP 35 DI 10.1007/s10704-006-0036-0 PG 17 WC Materials Science, Multidisciplinary; Mechanics SC Materials Science; Mechanics GA 069FN UT WOS:000239431900010 ER PT J AU Gerberich, WW Mook, WM Cordill, MJ Jungk, JM Boyce, B Friedmann, T Moody, NR Yang, D AF Gerberich, W. W. Mook, W. M. Cordill, M. J. Jungk, J. M. Boyce, B. Friedmann, T. Moody, N. R. Yang, D. TI Nanoprobing fracture length scales SO INTERNATIONAL JOURNAL OF FRACTURE LA English DT Article; Proceedings Paper CT 11th International Conference on Fracture CY MAR 20-25, 2005 CL Torino, ITALY SP Italian Govt, Minist Infrastructures transport, Natl Sci Fdn Italy ID SENSING INDENTATION EXPERIMENTS; THIN-FILMS; DISLOCATION EMISSION; COMPUTER-SIMULATION; PLASTIC-DEFORMATION; ACOUSTIC-EMISSION; CHANNEL CRACKING; STRAIN; NANOSTRUCTURES; DELAMINATION AB Historically fracture behavior has been measured and modeled from the largest structures of earthquakes and ships to the smallest components of semiconductor chips and magnetic recording media. Accompanying this is an evolutionary interest in scale effects partially due to advances in instrumentation and partially to expanded supercomputer simulations. We emphasize the former in this study using atomic force microscopy, nanoindentation and acoustic emission to probe volumes small in one, two and three dimensions. Predominant interest is on relatively ductile Cu and An films and semi-brittle, silicon nanoparticles. Measured elastic and plastic properties in volumes having at least one dimension on the order of 10 - 1000 nm, are shown to be state of stress and length scale dependent. These in turn are shown to affect fracture properties. All properties can vary by a factor of three dependent upon scale. Analysis of fracture behavior with dislocation-based, crack-tip shielding is shown to model both scale and stress magnitude effects. C1 Hysiton Inc, Minneapolis, MN 55404 USA. Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Sandia Natl Labs, Livermore, CA 94550 USA. RP Yang, D (reprint author), Hysiton Inc, Minneapolis, MN 55404 USA. EM wgerb@tc.umn.edu RI Boyce, Brad/H-5045-2012; OI Boyce, Brad/0000-0001-5994-1743; Cordill, Megan/0000-0003-1142-8312 NR 73 TC 10 Z9 10 U1 0 U2 9 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0376-9429 J9 INT J FRACTURE JI Int. J. Fract. PD MAR-APR PY 2006 VL 138 IS 1-4 BP 75 EP 100 DI 10.1007/s10704-006-7155-5 PG 26 WC Materials Science, Multidisciplinary; Mechanics SC Materials Science; Mechanics GA 069FN UT WOS:000239431900013 ER PT J AU Matveev, KI Swift, GW Backhaus, S AF Matveev, KI Swift, GW Backhaus, S TI Temperatures near the interface between an ideal heat exchanger and a thermal buffer tube or pulse tube SO INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER LA English DT Article DE thermoacoustics; pulse tube; thermal buffer tube; joining conditions; interface ID REFRIGERATORS AB A thermal buffer tube (or pulse tube) thermally isolates two heat exchangers at different temperatures in a thermoacoustic engine or refrigerator while allowing the flow of acoustic power. For many heat transport mechanisms, the quality of the thermal isolation depends on the time-averaged mean temperature distribution in the thermal buffer tube, which is determined by boundary conditions set up by the heat exchangers. However, finite-amplitude effects within one peak-to-peak gas displacement of the heat exchangers can lead to significant modification of the thermal boundary conditions and thus the heat transport. To explore these effects, measured mean temperature profiles in the vicinity of the interface between a heat exchanger and thermal buffer tube are reported for a broad range of acoustic and thermal conditions. A one-dimensional Lagrangian model is developed to predict the mean temperature distribution, and reasonable agreement between experimental data and model results is found for the majority of the acoustic conditions considered. (c) 2005 Elsevier Ltd. All rights reserved. C1 Los Alamos Natl Lab, Condensed Matter & Thermal Phys Grp, Los Alamos, NM 87545 USA. RP Swift, GW (reprint author), Los Alamos Natl Lab, Condensed Matter & Thermal Phys Grp, MS K764, Los Alamos, NM 87545 USA. EM swift@lanl.gov RI Backhaus, Scott/F-4285-2012; OI Backhaus, Scott/0000-0002-0344-6791 NR 16 TC 8 Z9 8 U1 0 U2 0 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 MAR PY 2006 VL 49 IS 5-6 BP 868 EP 878 DI 10.1016/j.ijheatmasstransfer.2005.09.029 PG 11 WC Thermodynamics; Engineering, Mechanical; Mechanics SC Thermodynamics; Engineering; Mechanics GA 023IS UT WOS:000236120900006 ER PT J AU McKone, TE Kyle, AD Jolliet, O Olsen, SI Hauschild, M AF McKone, TE Kyle, AD Jolliet, O Olsen, SI Hauschild, M TI Dose-response modeling for life cycle impact assessment - Findings of the Portland review workshop SO INTERNATIONAL JOURNAL OF LIFE CYCLE ASSESSMENT LA English DT Article C1 Univ Calif Berkeley, Sch Publ Hlth, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Tech Univ Denmark, DK-2800 Lyngby, Denmark. RP McKone, TE (reprint author), Univ Calif Berkeley, Sch Publ Hlth, Berkeley, CA 94720 USA. EM temckone@lbl.gov RI Hauschild, Michael/G-4335-2011; QSA, DTU/J-4787-2014; Olsen, Stig/K-6423-2015; Hauschild, Michael /L-6059-2015; OI Olsen, Stig/0000-0003-4599-7660; Hauschild, Michael /0000-0002-8331-7390; Jolliet, Olivier/0000-0001-6955-4210 NR 6 TC 13 Z9 13 U1 0 U2 4 PU ECOMED PUBLISHERS PI LANDSBERG PA JUSTUS-VON-LIEBIG-STR 1, D-86899 LANDSBERG, GERMANY SN 0948-3349 J9 INT J LIFE CYCLE ASS JI Int. J. Life Cycle Assess. PD MAR PY 2006 VL 11 IS 2 BP 137 EP 140 DI 10.1065/lca2006.02.005 PG 4 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 025CG UT WOS:000236242300011 ER PT J AU Laskin, J AF Laskin, J TI Chava Lifshitz memorial issue - An appreciation SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY LA English DT Biographical-Item C1 PNNL, Richland, WA USA. RP Laskin, J (reprint author), PNNL, Richland, WA USA. RI Laskin, Julia/H-9974-2012 OI Laskin, Julia/0000-0002-4533-9644 NR 1 TC 2 Z9 2 U1 0 U2 0 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 MAR 1 PY 2006 VL 249 BP XII EP XXII PG 11 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA 022TO UT WOS:000236079000002 ER PT J AU Wilson, KR Belau, L Nicolas, C Jimenez-Cruz, M Leone, SR Ahmed, M AF Wilson, KR Belau, L Nicolas, C Jimenez-Cruz, M Leone, SR Ahmed, M TI Direct determination of the ionization energy of histidine with VUV synchrotron radiation SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY LA English DT Article DE ionization energies; amino acids; single photon ionization; biological nanoparticles; ab-initio calculations ID AROMATIC-AMINO-ACIDS; PYROLYSIS-GAS CHROMATOGRAPHY; MASS-SPECTROMETRY; PHOTOELECTRON-SPECTROSCOPY; FRAGMENTATION REACTIONS; PROTON AFFINITIES; AB-INITIO; SPECTRA; PHASE; CONFORMATION AB Intact molecules of histidine are generated in the gas phase using impaction of nanoparticles on a heater. The direct determination of the ionization energy (IE) of histidine (155 m/z) is performed using single photon ionization with tunable vacuum ultraviolet (VUV) synchrotron radiation and is reported to be 8.2(+/- 0.1)eV. Ab initio calculations are performed at the B3LYP/6-311G (UB3LYP/6-311G) level of theory generating vertical and adiabatic ionization energies and possible fragmentation mechanisms. The theoretical adiabatic ionization energies derived for two lying conformers of histidine agree very well with the experimental result. Thermal dissociation at the heater gives rise to fragments, which are subsequently photoionized generating m/z 82 and 111, while m/z 110 is formed by dissociative photoionization of the histidine cation. Appearance energies of fragment ions at m/z 82, 110 and 111 are 8.5(+/- 0.1), 8.5(+/- 0.1) and 8.4(+/- 0.1) eV, respectively, at a heater temperature of 373 K. The H-atom dissociation energy of protonated histidine is derived to be 4.8(+/- 0.1) eV using thermodynamic arguments. Published by Elsevier B.V. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem & Phys, Berkeley, CA 94720 USA. RP Ahmed, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA. EM mahmed@lbl.gov RI Ahmed, Musahid/A-8733-2009 NR 36 TC 25 Z9 26 U1 4 U2 16 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 MAR 1 PY 2006 VL 249 BP 155 EP 161 DI 10.1016/j.ijms.2005.12.044 PG 7 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA 022TO UT WOS:000236079000019 ER PT J AU Laskin, J Bailey, TH Futrell, JH AF Laskin, J Bailey, TH Futrell, JH TI Mechanisms of peptide fragmentation from time- and energy-resolved surface-induced dissociation studies: Dissociation of angiotensin analogs SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY LA English DT Article DE surface-induced dissociation; protonated peptide; fragmentation mechanism; fragmentation energetics; FT-ICR MS ID GAS-PHASE BASICITIES; FT-ICR MS; RESONANCE MASS-SPECTROMETRY; PROTONATED PEPTIDES; ION CHEMISTRY; AMINO-ACIDS; AB-INITIO; AFFINITIES; ENERGETICS; CLEAVAGE AB Energetics and mechanism of dissociation of singly protonated angiotensin III (RVYIHPF) and its analogs RVYIFPF, RVYIYPF, RVYIHAF and RVYIHDF was studied using surface-induced dissociation (SID) in a Fourier transform ion cyclotron resonance mass spectrometer (Fr-ICR MS) specially configured for studying ion activation by collisions with surfaces. The energetics and dynamics of peptide fragmentation were deduced by modeling the time- and energy-resolved survival curves for each precursor ion using an RRKM-based approach developed in our laboratory. Fragmentation mechanisms were inferred from comparison of time- and energy-resolved fragmentation efficiency curves (TFECs) of different fragment ions followed by RRKM modeling of dissociation of angiotensin III into six major families of fragment ions. Detailed modeling demonstrated that dissociation of these peptides is dominated by loss of ammonia from the precursor ion and characterized by a high-energy barrier of 1.6 eV. Loss of NH3 and subsequent rearrangement of the MH+-NH3 ion results in proton mobilization and release of ca. 30 kcal/mol into internal excitation of the MH+-NH3 ion. The resulting highly excited ion accesses a variety of non-specific dissociation pathways with very high rate constants. Fast fragmentation of excited MH+-NH3 ion forms a variety of abundant b(n)-NH3 and a(n)-NH3 fragment ions. Abundant XH and HX internal fragments are also formed, reflecting the stability of histidine-containing diketopiperazine structures. (c) 2005 Elsevier B.V. All rights reserved. C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. Univ Delaware, Dept Chem & Biochem, Newark, DE 19716 USA. Pacific NW Natl Lab, Off Chief Res Officer, Richland, WA 99352 USA. RP Laskin, J (reprint author), Pacific NW Natl Lab, Fundamental Sci Directorate, POB 999,K8-88, Richland, WA 99352 USA. EM Julia.Laskin@pnl.gov RI Laskin, Julia/H-9974-2012 OI Laskin, Julia/0000-0002-4533-9644 NR 39 TC 22 Z9 22 U1 0 U2 1 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 MAR 1 PY 2006 VL 249 BP 462 EP 472 DI 10.1016/j.ijms.2005.11.007 PG 11 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA 022TO UT WOS:000236079000056 ER PT J AU Swiatecki, WJ AF Swiatecki, WJ TI Relativity and the speed of light - A 100 year old misunderstanding SO INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS LA English DT Article; Proceedings Paper CT 12th Workshop on Nuclear Physics - Marie and Pierre Curie CY SEP 21-25, 2005 CL Kazimierz Dolny, POLAND AB I point out a conceptual misunderstanding in the exposition of relativity, namely the mistaken belief that light has something to do with the essence of relativity. This misunderstanding can be clarified by stressing that the content of Special Relativity is simply that "we live in a Minkowski spacetime", together with a thought experiment that illustrates how one could discover this fact without ever mentioning even the existence of light. I also note a recently uncovered implication of living in Minkowski spacetime, namely the Copenhagen reinterpretation of Quantum Mechanics, developed in the past decade. C1 Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Lawrence Berkeley Natl Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM WJSwiatecki@lbl.gov NR 16 TC 1 Z9 1 U1 0 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0218-3013 EI 1793-6608 J9 INT J MOD PHYS E JI Int. J. Mod. Phys. E-Nucl. Phys. PD MAR PY 2006 VL 15 IS 2 BP 275 EP 283 DI 10.1142/S0218301306004107 PG 9 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 018JN UT WOS:000235760600001 ER PT J AU Goutte, H Berger, JF Gogny, D AF Goutte, H Berger, JF Gogny, D TI Fission collective dynamics in a microscopic framework SO INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS LA English DT Article; Proceedings Paper CT 12th Workshop on Nuclear Physics - Marie and Pierre Curie CY SEP 21-25, 2005 CL Kazimierz Dolny, POLAND ID NUCLEAR-FISSION; EVAPORATION; BARRIER; SPACE; U-238 AB A time-dependent microscopic approach of the fission process based on the constrained HFB approach with the Gogny force and the Hill and Wheeler configuration mixing method is described. Recent results concerning fragment distributions (mass, kinetic and deformation energies) and other fragment observables in U-238 obtained with such an approach are presented and discussed. C1 CEA, DAM Ile France, Serv Phys Nucl, F-91680 Bruyeres Le Chatel, France. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP CEA, DAM Ile France, Serv Phys Nucl, BP 12, F-91680 Bruyeres Le Chatel, France. EM heloise.goutte@cea.fr NR 22 TC 5 Z9 5 U1 0 U2 3 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0218-3013 EI 1793-6608 J9 INT J MOD PHYS E JI Int. J. Mod. Phys. E-Nucl. Phys. PD MAR PY 2006 VL 15 IS 2 BP 292 EP 301 DI 10.1142/S0218301306004120 PG 10 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 018JN UT WOS:000235760600003 ER PT J AU Staszczak, A Dobaczewski, J Nazarewicz, W AF Staszczak, A Dobaczewski, J Nazarewicz, W TI Fission barriers of superheavy nuclei in the skyrme-hartree-fock model SO INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS LA English DT Article; Proceedings Paper CT 12th Workshop on Nuclear Physics - Marie and Pierre Curie CY SEP 21-25, 2005 CL Kazimierz Dolny, POLAND ID HARMONIC-OSCILLATOR BASIS; BOGOLYUBOV EQUATIONS; PROGRAM; HFODD; VERSION AB Constrained Skyrme-Hartree-Fock calculations of static fission barriers are performed for even-even elements with Z = 100 divided by 110 as well as for superheavy N = 184 isotones. In our study we use the Skyrme parametrization SLy4 and a seniority pairing force treated in the BCS approximation. The computations are carried out applying a code that makes it possible to break all self-consistent symmetries of the nuclear mean field, including axial symmetry and reflection symmetry. The influence of reflection-asymmetric and triaxial degrees of freedom on fission barriers are discussed. C1 Marie Curie Sklodowska Univ, Inst Phys, PL-20031 Lublin, Poland. Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Staszczak, A (reprint author), Marie Curie Sklodowska Univ, Inst Phys, Pl M Curie Sklodowskiej 1, PL-20031 Lublin, Poland. EM stas@tytan.umcs.lublin.pl; jacek.dobaczewski@fuw.edu.pl; witek@utk.edu NR 21 TC 8 Z9 8 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0218-3013 J9 INT J MOD PHYS E JI Int. J. Mod. Phys. E-Nucl. Phys. PD MAR PY 2006 VL 15 IS 2 BP 302 EP 310 DI 10.1142/S0218301306004132 PG 9 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 018JN UT WOS:000235760600004 ER PT J AU Dukelsky, J Ortiz, G AF Dukelsky, J Ortiz, G TI The exactly solvable Richardson model in the BCS-to-BEC crossover SO INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS LA English DT Article; Proceedings Paper CT 12th Workshop on Nuclear Physics - Marie and Pierre Curie CY SEP 21-25, 2005 CL Kazimierz Dolny, POLAND AB The exact Richardson solution of the reduced BCS Hamiltonian is reviewed with special emphasis on the structure of the many-body wavefunction. A clear definition of the Cooper pairs in the superconducting or Fermi superfluid medium emerges. The structure of the Cooper pair wavefunction is general enough to describe large overlapping pair resonances in the weak coupling limit (BCS) as well as a Bose-Einstein condensate (BEC) of quasi-bound molecules in the strong coupling limit. C1 CSIC, Inst Estructura Mat, E-28006 Madrid, Spain. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Dukelsky, J (reprint author), CSIC, Inst Estructura Mat, Serrano 123, E-28006 Madrid, Spain. EM dukelsky@iem.cfmac.csic.es; ortiz@viking.lanl.gov RI Dukelsky, Jorge/I-1118-2015 OI Dukelsky, Jorge/0000-0002-7715-5487 NR 21 TC 2 Z9 2 U1 0 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0218-3013 J9 INT J MOD PHYS E JI Int. J. Mod. Phys. E-Nucl. Phys. PD MAR PY 2006 VL 15 IS 2 BP 324 EP 332 DI 10.1142/S0218301306004168 PG 9 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 018JN UT WOS:000235760600007 ER PT J AU Williams, PT Wood, PD AF Williams, PT Wood, PD TI The effects of changing exercise levels on weight and age-related weight gain SO INTERNATIONAL JOURNAL OF OBESITY LA English DT Article DE exercise; running; aging; body mass index; regional adiposity ID CORONARY HEART-DISEASE; ENERGY-EXPENDITURE; PHYSICAL-ACTIVITY; BODY-COMPOSITION; CARDIORESPIRATORY FITNESS; MORTALITY; WOMEN; MEN; OBESITY; OVERWEIGHT AB Objective: To determine prospectively whether physical activity can prevent age-related weight gain and whether changing levels of activity affect body weight. Design/subjects: The study consisted of 8080 male and 4871 female runners who completed two questionnaires an average ( +/- standard deviation ( s.d.)) of 3.20 +/- 2.30 and 2.59 +/- 2.17 years apart, respectively, as part of the National Runners' Health Study. Results: Changes in running distance were inversely related to changes in men's and women's body mass indices ( BMIs) ( slope +/- standard error ( s.e.): -0.015 +/- 0.001 and -0.009 +/- 0.001 kg/m(2) per Delta km/week, respectively), waist circumferences ( -0.030 +/- 0.002 and -0.022 +/- 0.005 cm per Delta km/week, respectively) and percent changes in body weight ( -0.062 +/- 0.003 and -0.041 +/- 0.003% per Delta km/week, respectively, all P < 0.0001). The regression slopes were significantly steeper ( more negative) in men than women for Delta BMI and Delta%body weight ( P < 0.0001). A longer history of running diminished the impact of changing running distance on men's weights. When adjusted for Delta km/week, years of aging in men and years of aging in women were associated with increases of 0.066 +/- 0.005 and 0.056 +/- 0.006 kg/m(2) in BMI, respectively, increases of 0.294 +/- 0.019 and 0.279 +/- 0.028% in Delta% body weight, respectively, and increases of 0.203 +/- 0.016 and 0.271 +/- 0.033cm in waist circumference, respectively ( all P < 0.0001). These regression slopes suggest that vigorous exercise may need to increase 4.4 km/week annually in men and 6.2 km/week annually in women to compensate for the expected gain in weight associated with aging ( 2.7 and 3.9 km/week annually when correct for the attenuation due to measurement error). Conclusions: Age-related weight gain occurs even among the most active individuals when exercise is constant. Theoretically, vigorous exercise must increase significantly with age to compensate for the expected gain in weight associated with aging. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Donner Lab, Berkeley, CA 94720 USA. Stanford Univ, Stanford Ctr Res Dis Prevent, Sch Med, Stanford, CA 94305 USA. RP Williams, PT (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Donner Lab, Berkeley, CA 94720 USA. EM ptwilliams@lbl.gov FU NHLBI NIH HHS [HL-072110, R01 HL072110, HL-45652]; NIA NIH HHS [R03 AG032004-01A1, R03 AG032004]; NIDDK NIH HHS [R01 DK066738, DK066738] NR 37 TC 29 Z9 30 U1 0 U2 2 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0307-0565 J9 INT J OBESITY JI Int. J. Obes. PD MAR PY 2006 VL 30 IS 3 BP 543 EP 551 DI 10.1038/sj.ijo.0803172 PG 9 WC Endocrinology & Metabolism; Nutrition & Dietetics SC Endocrinology & Metabolism; Nutrition & Dietetics GA 016UL UT WOS:000235645900019 PM 16314878 ER PT J AU Roy, D Calaf, GM Hande, MP Hei, TK AF Roy, D Calaf, GM Hande, MP Hei, TK TI Allelic imbalance at 11q23-q24 chromosome associated with estrogen and radiation-induced breast cancer progression SO INTERNATIONAL JOURNAL OF ONCOLOGY LA English DT Article DE allelic imbalance; estrogen; breast cancer ID INDUCED NEOPLASTIC TRANSFORMATION; TUMOR-SUPPRESSOR GENE; EPITHELIAL-CELLS; CHEMICAL CARCINOGENS; IONIZING-RADIATION; OVARIAN-CANCER; FISH ANALYSIS; HETEROZYGOSITY; REGIONS; REARRANGEMENTS AB Multiple genetic alterations are common in cancers including those of the breast. The mechanisms leading to these alterations such as point mutations, gene amplifications, deletions and replication error are often associated with frequent and consistent loss of heterozygosity (LOH) or microsatellite instability (MSI). Several cytological and molecular studies have shown high frequency loss of genetic information on the long arm of chromosome 11 (i.e., 11q) in various primary breast cancers. In the present study allelic alterations in a refined position oil the long arm of chromosome 11 were Studied to identify the spectrum of induced damage at different stages of malignant transformation of MCF-10F cell lines after exposure to high-LET radiation using alpha-particles and exposure to estradiol by using PCR-single strand conformation polymorphism (SSCP) and fluorescence in sitit hybridization (FISH) analysis. Microsatellite markers were selected from chromosome 11 (11 q23-q24 loci) and it was found that frequency of allelic imbalance occurs at different stages Of tumor progression with a range of 15-45% depending oil the marker studied. These results strongly suggested the presence of several tumor Suppressor genes in this critical region of chromosome 11 (11 q23-q24). It also represents the first indication of allele loss at these loci in human breast epithelial cells induced by radiation and estrogen treatment suggesting a potential interventional target in breast carcinogenesis. C1 Columbia Univ, Coll Phys & Surg, Ctr Radiol Res, New York, NY USA. Univ Tarapaca, Dept Biol & Hlth, Fac Sci, Arica, Chile. Univ Tarapaca, Ctr Invest Hombre Desierto, Arica, Chile. Natl Univ Singapore, Dept Physiol, Fac Med, Singapore 117548, Singapore. RP Roy, D (reprint author), Brookhaven Natl Lab, Dept Biol, 463,50 Bell Ave, Upton, NY 11973 USA. EM droy@bnl.gov RI Hande, M. Prakash/B-1645-2008 OI Hande, M. Prakash/0000-0002-4511-6256 FU NCI NIH HHS [CA49062]; NIEHS NIH HHS [ES05786, P30 ES09089] NR 58 TC 8 Z9 8 U1 0 U2 4 PU SPANDIDOS PUBL LTD PI ATHENS PA POB 18179, ATHENS, 116 10, GREECE SN 1019-6439 J9 INT J ONCOL JI Int. J. Oncol. PD MAR PY 2006 VL 28 IS 3 BP 667 EP 674 PG 8 WC Oncology SC Oncology GA 012GA UT WOS:000235325000012 PM 16465372 ER PT J AU Davenport, MP Zhang, L Shiver, JW Casmiro, DR Ribeiro, RM Perelson, AS AF Davenport, MP Zhang, L Shiver, JW Casmiro, DR Ribeiro, RM Perelson, AS TI Influence of peak viral load on the extent of CD4(+) T-cell depletion in simian HIV infection SO JAIDS-JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES LA English DT Article DE vaccine; pathogenesis; viral load; virus-cell interaction; CD4-positive T lymphocytes; mathematic models ID IMMUNODEFICIENCY-VIRUS-INFECTION; RHESUS-MONKEYS; NEUTRALIZING ANTIBODIES; GASTROINTESTINAL-TRACT; CHIMERIC VIRUS; MACAQUES; DYNAMICS; MEMORY; REPLICATION; VIREMIA AB Simian HIV (SHIV) infection of macaques with CXCR4 tropic viruses results in early and profound CD4(+) T-cell depletion in the first few weeks of infection. Analyzing data from a large study of vaccination and SHIV-89.6P challenge, we observe a strong correlation between peak viral load and the extent of CD4(+) T-cell depletion in acute infection, consistent with a simple kinetic model of viral infection of CD4(+) T cells. We have modeled the dynamics of the interaction of virus and CD4(+) T cells over time to investigate the rate of CD4(+) T-cell infection and death. This analysis indicates that up to 80% of CD4(+) T cells are infected at peak viremia and that the proportion of CD4(+) T cells destroyed is correlated with the peak viral load. The simple relation between viral load and CD4(+) T-cell depletion allows prediction of the level of viral control required to prevent CD4(+) T-cell depletion in acute SHIV infection. Whether such a simple relation also holds for HIV or simian immunodeficiency virus infections remains to be determined, particularly in the gut and other anatomic sites in which most early T-cell depletion occurs. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ New S Wales, Prince Wales Hosp, Dept Haematol, Kensington, NSW 2033, Australia. Univ New S Wales, Ctr Vasc Res, Kensington, NSW 2033, Australia. Merck Res Labs, West Point, PA USA. RP Perelson, AS (reprint author), Los Alamos Natl Lab, MS-K710,T-10, Los Alamos, NM 87545 USA. EM asp@lanl.gov FU NCRR NIH HHS [RR 18754, RR 06555]; NIAID NIH HHS [AI 28433] NR 36 TC 31 Z9 31 U1 0 U2 3 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 1525-4135 J9 JAIDS-J ACQ IMM DEF JI JAIDS PD MAR PY 2006 VL 41 IS 3 BP 259 EP 265 DI 10.1097/01.qai.0000199232.31340.d3 PG 7 WC Immunology; Infectious Diseases SC Immunology; Infectious Diseases GA 019WX UT WOS:000235870000001 PM 16540926 ER PT J AU van de Vijver, DA Wensing, AMJ Angarano, G Asjo, B Balotta, C Boeri, E Camacho, R Chaix, ML Costagliola, D De Luca, A Derdelinckx, I Grossman, Z Hamouda, O Hatzakis, A Hemmer, R Hoepelman, A Horban, A Korn, K Kucherer, C Leitner, T Loveday, C MacRae, E Maljkovic, I de Mendoza, C Meyer, L Nielsen, C de Coul, ELMO Ormaasen, V Paraskevis, D Perrin, L Puchhammer-Stockl, E Ruiz, L Salminen, M Schmit, JC Schneider, F Schuurman, R Soriano, V Stanczak, G Stanojevic, M Vandamme, AM Van Laethem, K Violin, M Wilbe, K Yerly, S Zazzi, M Boucher, CAB AF van de Vijver, DA Wensing, AMJ Angarano, G Asjo, B Balotta, C Boeri, E Camacho, R Chaix, ML Costagliola, D De Luca, A Derdelinckx, I Grossman, Z Hamouda, O Hatzakis, A Hemmer, R Hoepelman, A Horban, A Korn, K Kucherer, C Leitner, T Loveday, C MacRae, E Maljkovic, I de Mendoza, C Meyer, L Nielsen, C de Coul, ELMO Ormaasen, V Paraskevis, D Perrin, L Puchhammer-Stockl, E Ruiz, L Salminen, M Schmit, JC Schneider, F Schuurman, R Soriano, V Stanczak, G Stanojevic, M Vandamme, AM Van Laethem, K Violin, M Wilbe, K Yerly, S Zazzi, M Boucher, CAB CA SPREAD Programme TI The calculated genetic barrier for antiretroviral drug resistance substitutions is largely similar for different HIV-1 subtypes SO JAIDS-JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES LA English DT Article; Proceedings Paper CT 13th International HIV Drug Resistance Workshop CY JUN 08-12, 2004 CL Tenerife, SPAIN DE HIV; non-B subtypes; drug resistance; genetic barrier ID IMMUNODEFICIENCY-VIRUS TYPE-1; REVERSE-TRANSCRIPTASE; CLADE-C; PROTEASE; MUTATION; POLYMORPHISMS; INDIVIDUALS; PREVALENCE; NUCLEOTIDE; VARIANTS AB Background: The genetic barrier, defined as the number of mutations required to overcome drug-selective pressure, is an important factor for the development of HIV drug resistance. Because of high variability between subtypes, particular HIV-1 subtypes could have different genetic barriers for drug resistance substitutions. This study compared the genetic barrier between subtypes using some 2000 HIV-1 sequences (> 600 of non-B subtype) isolated from antiretroviral-naive patients in Europe. Methods: The genetic barrier was calculated as the sum of transitions (scored as 1) and/or transversions (2.5) required for evolution to any major drug resistance substitution. In addition, the number of minor protease substitutions was determined for every subtype. Results: Few dissimilarities were found. An increased genetic barrier was calculated for 182A (subtypes C and G), V 1081 (subtype G), V 1181 (subtype G), Q 15 1 M (subtypes D and F), L210W (subtypes C, F, G, and CRF02_AG), and P225H (subtype A) (P < 0.001 compared with subtype B). A decreased genetic barrier was found for I82T (subtypes C and G) and V106M (subtype C) (P < 0.001 vs subtype B). Conversely, minor protease substitutions differed extensively between subtypes. Conclusions: Based on the calculated genetic barrier, the rate of drug resistance development may be similar for different HIV-1 subtypes. Because of differences in minor protease substitutions, protease inhibitor resistance could be enhanced in particular subtypes once the relevant major substitutions are selected. C1 Univ Utrecht, Eijkman Winkler Inst, Ctr Med, Dept Virol, NL-3584 CX Utrecht, Netherlands. Univ Utrecht, Med Ctr, Dept Internal Med, Utrecht, Netherlands. Univ Foggia, Foggia, Italy. Univ Bergen, Bergen, Norway. Univ Milan, Milan, Italy. Diagnost & Ric San Raffaele, Milan, Italy. Hosp Egas Moniz, Lisbon, Portugal. Hop Necker Enfants Malad, Virol Lab, Paris, France. CHU Pitie Salpetriere, INSERM, EMI 0214, Paris, France. Catholic Univ Rome, Inst Clin Infect Dis, Rome, Italy. Katholieke Univ Leuven, Kega Inst Med Res, Louvain, Belgium. Chaim Sheba Med Ctr, IL-52621 Tel Hashomer, Israel. Robert Koch Inst, D-1000 Berlin, Germany. Univ Athens, Sch Med, GR-11527 Athens, Greece. Ctr Hosp, Luxembourg, Luxembourg. Hosp Infect Dis, Warsaw, Poland. AIDS Diagnosis & Therapy Ctr, Warsaw, Poland. Univ Erlangen Nurnberg, Erlangen, Germany. Los Alamos Natl Lab, Los Alamos, NM USA. Swedish Inst Infect Dis Control, Solna, Sweden. Hosp Carlos III, Madrid, Spain. INSERM, U569, Le Kremlin Bicetre, France. State Serum Inst, Copenhagen, Denmark. Natl Inst Publ Hlth & Environm, NL-3720 BA Bilthoven, Netherlands. Ullevaal Univ Hosp, Oslo, Norway. Univ Hosp Geneva, Geneva, Switzerland. Univ Vienna, Vienna, Austria. IRSICAIXA Fdn, Retroviral Lab, Badalona, Spain. Natl Publ Hlth Inst, Helsinki, Finland. Univ Belgrade, Belgrade, Serbia Monteneg. Univ Siena, I-53100 Siena, Italy. RP Boucher, CAB (reprint author), Univ Utrecht, Eijkman Winkler Inst, Ctr Med, Dept Virol, G04-614, NL-3584 CX Utrecht, Netherlands. EM C.Boucher@azu.nl RI wensing, a.m.j./F-3005-2011; De Luca, Andrea/G-8810-2011; Vandamme, Anne Mieke/I-4127-2012; Salminen, Mika/D-8784-2013; Camacho, Ricardo/I-7629-2012; Costagliola, Dominique/H-5849-2011; Van Laethem, Kristel/R-6282-2016; OI Vandamme, Anne Mieke/0000-0002-6594-2766; Salminen, Mika/0000-0003-3020-0866; ANGARANO, Gioacchino/0000-0003-3207-7523; Camacho, Ricardo/0000-0002-9129-3237; Costagliola, Dominique/0000-0003-0765-0869; Van Laethem, Kristel/0000-0001-6036-2271; Stanojevic, Maja/0000-0002-4643-4272; Paraskevis, Dimitrios/0000-0001-6167-7152 NR 26 TC 67 Z9 70 U1 1 U2 6 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 1525-4135 J9 JAIDS-J ACQ IMM DEF JI JAIDS PD MAR PY 2006 VL 41 IS 3 BP 352 EP 360 DI 10.1097/01.qai.0000209899.05126.e4 PG 9 WC Immunology; Infectious Diseases SC Immunology; Infectious Diseases GA 019WX UT WOS:000235870000013 PM 16540937 ER PT J AU Morris, JR Wang, XL Fultz, BT AF Morris, JR Wang, XL Fultz, BT TI Neutron scattering applied to materials problems SO JOM LA English DT Editorial Material C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Tennessee, Knoxville, TN USA. CALTECH, Pasadena, CA 91125 USA. RP Morris, JR (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Wang, Xun-Li/C-9636-2010; Morris, J/I-4452-2012 OI Wang, Xun-Li/0000-0003-4060-8777; Morris, J/0000-0002-8464-9047 NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1047-4838 J9 JOM-US JI JOM PD MAR PY 2006 VL 58 IS 3 BP 46 EP 46 DI 10.1007/s11837-006-0160-3 PG 1 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA 021UY UT WOS:000236012600007 ER PT J AU Wang, XL AF Wang, XL TI The application of neutron diffraction to engineering problems SO JOM LA English DT Article ID RESIDUAL-STRESSES; INTERNAL-STRESSES; AUSTENITIC STEEL; TEMPERATURE; BEHAVIOR; TEXTURE AB After more than two decades of extensive development, neutron diffraction has become an essential research tool for the study of mechanical behavior in materials. This article will focus on how information obtained from the diffraction peak position and width is used to answer important questions concerning the mechanical behavior of materials. The principle of strain measurements is described, and the concept of strain mapping is introduced. Examples are presented to illustrate the application of neutron diffraction to engineering problems, and new research opportunities are discussed that will be enabled by the next generation of instruments. C1 Oak Ridge Natl Lab, Spallat Neutron Source & Met & Ceram Div, Oak Ridge, TN 37831 USA. RP Wang, XL (reprint author), Oak Ridge Natl Lab, Spallat Neutron Source & Met & Ceram Div, Oak Ridge, TN 37831 USA. EM wangxl@ornl.gov RI Wang, Xun-Li/C-9636-2010 OI Wang, Xun-Li/0000-0003-4060-8777 NR 21 TC 6 Z9 6 U1 0 U2 3 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1047-4838 J9 JOM-US JI JOM PD MAR PY 2006 VL 58 IS 3 BP 52 EP 57 DI 10.1007/s11837-006-0162-1 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA 021UY UT WOS:000236012600009 ER PT J AU Holden, T Krawitz, AD Anderson, I AF Holden, T Krawitz, AD Anderson, I TI Neutron sources in North America: Present and future SO JOM LA English DT Article AB Six neutron sources are available for research in North America. The facilities are funded by their respective governments as user-facilities. User proposals are accepted on a regular basis and if they are successful in competition with all the other proposals, time is allocated for the experiments. This paper describes the neutron sources and their capabilities. C1 Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA. Oak Ridge Natl Lab, Expt Facil Div, SNS, Oak Ridge, TN USA. RP Holden, T (reprint author), No Stress Tech, 208 Pine Point Rd, Deep River, ON KOJ 1P0, Canada. EM holdent@magma.ca NR 0 TC 1 Z9 1 U1 0 U2 0 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1047-4838 J9 JOM-US JI JOM PD MAR PY 2006 VL 58 IS 3 BP 64 EP 67 DI 10.1007/s11837-006-0164-z PG 4 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA 021UY UT WOS:000236012600011 ER PT J AU Michel, EG Dunham, D Tejeda, A Soukiassian, P Rotenberg, E Denlinger, JD AF Michel, EG Dunham, D Tejeda, A Soukiassian, P Rotenberg, E Denlinger, JD TI The (3x2) beta-SiC(001) surface reconstruction investigated by photoelectron diffraction in the backscattering regime SO JOURNAL DE PHYSIQUE IV LA English DT Article; Proceedings Paper CT 10th International Conference on the Formation of Semiconductor Interfaces CY JUL 03-08, 2005 CL Univ Paul Cezanne, Aix en Provence, FRANCE HO Univ Paul Cezanne ID ENERGY ELECTRON-DIFFRACTION; X-RAY PHOTOELECTRON; SI ATOMIC LINES; AUGER-ELECTRON; SCATTERING; CRYSTALLOGRAPHY; SPECTROSCOPY; RELIABILITY AB The atomic positions of the (3 x 2) reconstruction of the Cubic polytype of SiC(001) are determined by using photoelectron diffraction in the backscattering regime. The comparison of multiple scattering spherical wave Calculations with experimental data favours a modified version of the two-adlayer asymmetric dimer model. The atomic positions in the reconstructed layers are obtained from an R-factor refinement analysis. Atoms in the Outermost layer form asymmetric dimers with a corrugation of (0.25 +/- 0.10) angstrom. The second layer is also dimerized and originates rows of long and short dimers. C1 Univ Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, Spain. Univ Autonoma Madrid, Inst Ciencia Mat Nicolas Cabrera, E-28049 Madrid, Spain. Univ Paris Sud, DSM, DRECAM,SPCSI, Comissariat Energie Atom,Lab SIMA, F-91191 Gif Sur Yvette, France. No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. Ernest Orlando Lawrence Berkeley Natl Lab, ALS, Berkeley, CA 94720 USA. RP Michel, EG (reprint author), Univ Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, Spain. EM enrique.garcia.michel@uam.es; psoukiassian@cea.fr RI Rotenberg, Eli/B-3700-2009; Michel, Enrique/A-1545-2008; Tejeda, Antonio/C-4711-2014 OI Rotenberg, Eli/0000-0002-3979-8844; Michel, Enrique/0000-0003-4207-7658; Tejeda, Antonio/0000-0003-0125-4603 NR 25 TC 0 Z9 0 U1 0 U2 1 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 1155-4339 J9 J PHYS IV JI J. Phys. IV PD MAR PY 2006 VL 132 BP 49 EP 55 DI 10.1051/jp4:200613210 PG 7 WC Physics, Multidisciplinary SC Physics GA 029XS UT WOS:000236598300010 ER PT J AU De la Iglesia, R Castro, D Ginocchio, R van der Lelie, D Gonzalez, B AF De la Iglesia, R Castro, D Ginocchio, R van der Lelie, D Gonzalez, B TI Factors influencing the composition of bacterial communities found at abandoned copper-tailings dumps SO JOURNAL OF APPLIED MICROBIOLOGY LA English DT Article DE bioavailable copper; copper toxicity; mine wastes; revegetation; tailings; terminal-restriction fragment length polymorphism ID MICROBIAL COMMUNITIES; BIOSENSORS; CHILE; RESISTANCE; PROFILES; TOXICITY; SAMPLES; SOILS AB Aims: To study the effect that copper residues exert on bacterial communities and the ability of bacteria to colonize different microhabitats in abandoned tailing dumps. Methods and Results: We used the terminal-restriction fragment length polymorphism technique, a culture-independent molecular approach based on PCR amplification of ribosomal genes, to compare the structure of the bacterial communities from samples taken at two nearby located abandoned tailing dumps found in the Mediterranean-climate area of central Chile. Our results show that elevated available copper content in tailings has a strong effect on the bacterial community composition, but that other factors like pH and organic matter content also play an important role in the structure of these communities. We also found that the number of abundant bacteria in these samples was significantly lower than in soils not exposed to metal pollution. Conclusions: In addition to bioavailable copper, bacterial communities found in copper-tailings dumps are also affected by several other environmental factors. Significance and Impact of the Study: This first report on environmental factors influencing microbial communities in copper-tailings dumps will help to devise appropriate restoration procedures in this type of polluted habitat. C1 Catholic Univ Chile, Ctr Adv Studies Ecol & Biodivers, Lab Microbiol, Fac Ciencias Biol,Dept Genet Mol & Microbiol, Santiago, Chile. Ctr Invest Mineras & Met, Lab Suelos & Plantas, Santiago, Chile. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. RP Gonzalez, B (reprint author), Catholic Univ Chile, Ctr Adv Studies Ecol & Biodivers, Lab Microbiol, Fac Ciencias Biol,Dept Genet Mol & Microbiol, Casilla 114-D, Santiago, Chile. EM bgonzale@bio.puc.cl NR 32 TC 15 Z9 17 U1 4 U2 15 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 1364-5072 J9 J APPL MICROBIOL JI J. Appl. Microbiol. PD MAR PY 2006 VL 100 IS 3 BP 537 EP 544 DI 10.1111/j.1365-2672.2005.02793.x PG 8 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 012IO UT WOS:000235332100013 PM 16478493 ER PT J AU Hearne, SJ Floro, JA Rodriguez, MA Tissot, RT Frazer, CS Brewer, L Hlava, P Foiles, S AF Hearne, SJ Floro, JA Rodriguez, MA Tissot, RT Frazer, CS Brewer, L Hlava, P Foiles, S TI Stress creation during Ni-Mn alloy electrodeposition SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID THIN-FILMS; MICROSYSTEM APPLICATIONS; ISLAND COALESCENCE; SURFACE-DIFFUSION; INTRINSIC STRESS; EVOLUTION; GROWTH AB The stress evolution during electrodeposition of NiMn from a sulfamate-based bath was investigated as a function of Mn concentration and current density. The NiMn stress evolution with film thickness exhibited an initial high transitional stress region followed by a region of steady-state stress with a magnitude that depended on deposition rate, similar to the previously reported stress evolution in electrodeposited Ni [S. J. Hearne and J. A. Floro, J. Appl. Phys. 97, 014901-1 (2005)]. The incorporation of increasing amounts of Mn resulted in a linear increase in the steady-state stress at constant current density. However, no significant changes in the texture or grain size were observed, which indicates that an atomistic process is driving the changes in steady-state stress. Additionally, microstrain measured by ex situ x-ray diffraction increased with increasing Mn content, which was likely the result of localized lattice distortions associated with substitutional incorporation of Mn and/or increased twin density. (c) 2006 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Hearne, SJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM sjhearn@sandia.gov NR 21 TC 6 Z9 6 U1 1 U2 10 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 1 PY 2006 VL 99 IS 5 AR 053517 DI 10.1063/1.2179138 PG 4 WC Physics, Applied SC Physics GA 021RP UT WOS:000236002900025 ER PT J AU Joly, AG Williams, JR Chambers, SA Xiong, G Hess, WP Laman, DM AF Joly, AG Williams, JR Chambers, SA Xiong, G Hess, WP Laman, DM TI Carrier dynamics in alpha-Fe2O3 (0001) thin films and single crystals probed by femtosecond transient absorption and reflectivity SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID PIEZOELECTRIC FIELDS; ACOUSTIC PHONONS; QUANTUM-WELLS; IRON-OXIDE; HEMATITE; GAAS; HETEROJUNCTIONS; NANOPARTICLES; GENERATION; PULSES AB Femtosecond transient reflectivity and absorption are used to measure the carrier lifetimes in alpha-Fe2O3 thin films and single crystals. The results from the thin films show that initially excited hot electrons relax to the band edge within 300 fs and then recombine with holes or trap within 5 ps. The trapped electrons have a lifetime of hundreds of picoseconds. Transient reflectivity measurements from hematite (alpha-Fe2O3) single crystals show similar but slightly faster dynamics leading to the conclusion that the short carrier lifetimes in these materials are due primarily to trapping to Fe d-d states in the band gap. In the hematite single crystal, the transient reflectivity displays oscillations due to the formation of longitudinal acoustic phonons generated following absorption of the ultrashort excitation pulse. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Cent Washington Univ, Ellensburg, WA 98926 USA. RP Joly, AG (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. EM agjoly@pnl.gov NR 23 TC 87 Z9 87 U1 3 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 1 PY 2006 VL 99 IS 5 AR 053521 DI 10.1063/1.2177426 PG 6 WC Physics, Applied SC Physics GA 021RP UT WOS:000236002900029 ER PT J AU Chhabra, SR He, Q Huang, KH Gaucher, SP Alm, EJ He, Z Hadi, MZ Hazen, TC Wall, JD Zhou, J Arkin, AP Singh, AK AF Chhabra, SR He, Q Huang, KH Gaucher, SP Alm, EJ He, Z Hadi, MZ Hazen, TC Wall, JD Zhou, J Arkin, AP Singh, AK TI Global analysis of heat shock response in Desulfovibrio vulgaris Hildenborough SO JOURNAL OF BACTERIOLOGY LA English DT Article ID GENE-EXPRESSION ANALYSIS; ESCHERICHIA-COLI K-12; BACILLUS-SUBTILIS; TRANSCRIPTIONAL REGULATION; SHEWANELLA-ONEIDENSIS; ENERGY-METABOLISM; GENOME SEQUENCE; PROTEIN; DNA; MICROARRAY AB Desulfovibrio vulgaris Hildenborough belongs to a class of sulfate-reducing bacteria (SRB) and is found ubiquitously in nature. Given the importance of SRB-mediated reduction for bioremediation of metal ion contaminants, ongoing research on D. vulgaris has been in the direction of elucidating regulatory mechanisms for this organism under a variety of stress conditions. This work presents a global view of this organism's response to elevated growth temperature using whole-cell transcriptomics and proteomics tools. Transcriptional response (1.7-fold change or greater; Z >= 1.5) ranged from 1,135 genes at 15 min to 1,463 genes at 120 min for a temperature up-shift of 13 degrees C from a growth temperature of 37 degrees C for this organism and suggested both direct and indirect modes of heat sensing. Clusters of orthologous group categories that were significantly affected included posttranslational modifications; protein turnover and chaperones (up-regulated); energy production and conversion (down-regulated), nucleotide transport, metabolism (down-regulated), and translation; ribosomal structure; and biogenesis (down-regulated). Analysis of the genome sequence revealed the presence of features of both negative and positive regulation which included the CIRCE element and promoter sequences corresponding to the alternate sigma factors sigma(32) and sigma(54). While mechanisms of heat shock control for some genes appeared to coincide with those established for Escherichia coli and Bacillus subtilis, the presence of unique control schemes for several other genes was also evident. Analysis of protein expression levels using differential in-get electrophoresis suggested good agreement with transcriptional profiles of several heat shock proteins, including DnaK (DVU0811), HtpG (DVU2643), HtrA (DVU1468), and AhpC (DVU2247). The proteomics study also suggested the possibility of posttranslational modifications in the chaperones DnaK, AhpC, GroES (DVU1977), and GroEL (DVU1976) and also several periplasmic ABC transporters. C1 Sandia Natl Labs, Biosyst Res Dept, Livermore, CA 94550 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA. Univ Missouri, Dept Biochem, Columbia, MO 65211 USA. Univ Missouri, Dept Mol Microbiol & Immunol, Columbia, MO 65211 USA. RP Singh, AK (reprint author), Sandia Natl Labs, Biosyst Res Dept, Mailstop 9292,7011 E Ave, Livermore, CA 94550 USA. EM aksingh@sandia.gov RI Arkin, Adam/A-6751-2008; He, Qiang/G-9061-2011; He, Zhili/C-2879-2012; Hazen, Terry/C-1076-2012 OI Arkin, Adam/0000-0002-4999-2931; He, Qiang/0000-0002-7155-6474; Hazen, Terry/0000-0002-2536-9993 NR 49 TC 77 Z9 79 U1 2 U2 15 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 MAR PY 2006 VL 188 IS 5 BP 1817 EP 1828 DI 10.1128/JB.188.5.1817-1828.2006 PG 12 WC Microbiology SC Microbiology GA 019EU UT WOS:000235819200015 PM 16484192 ER PT J AU King, PW Posewitz, MC Ghirardi, ML Seibert, M AF King, PW Posewitz, MC Ghirardi, ML Seibert, M TI Functional studies of [FeFe] hydrogenase maturation in an Escherichia coli biosynthetic system SO JOURNAL OF BACTERIOLOGY LA English DT Article ID ALGA CHLAMYDOMONAS-REINHARDTII; ACTIVE-SITE; CLOSTRIDIUM-ACETOBUTYLICUM; ONLY HYDROGENASE; S-ADENOSYLMETHIONINE; CRYSTAL-STRUCTURE; IRON HYDROGENASE; CARBON-MONOXIDE; DESULFOVIBRIO-DESULFURICANS; MOLECULAR CHARACTERIZATION AB Maturation of [FeFe] hydrogenases requires the biosynthesis and insertion of the catalytic iron-sulfur cluster, the H cluster. Two radical S-adenosylmethionine (SAM) proteins proposed to function in H cluster biosynthesis, HydEF and HydG, were recently identified in the hydEF-1 mutant of the green alga Chlamydomonas reinhardtii (M. C. Posewitz, P. W. King, S. L. Smolinski, L. Zhang, M. Seibert, and M. L. Ghirardi, J. Biol. Chem. 279:25711-25720, 2004). Previous efforts to study [FeFe] hydrogenase maturation in Escherichia coli by coexpression of C. reinhardtii HydEF and HydG and the HydA1 [FeFe] hydrogenase were hindered by instability of the hydEF and hydG expression clones. A more stable [FeFe] hydrogenase expression system has been achieved in E. coli by cloning and coexpression of hydE, hydF, and hydG from the bacterium Clostridium acetobutylicum. Coexpression of the C. acetobutylicum maturation proteins with various algal and bacterial [FeFe] hydrogenases in E. coli resulted in purified enzymes with specific activities that were similar to those of the enzymes purified from native sources. In the case of structurally complex [FeFe] hydrogenases, maturation of the catalytic sites could occur in the absence of an accessory iron-sulfur cluster domain. Initial investigations of the structure and function of the maturation proteins HydE, HydF, and HydG showed that the highly conserved radical-SAM domains of both HydE and HydG and the GTPase domain of HydF were essential for achieving biosynthesis of active [FeFe] hydrogenases. Together, these results demonstrate that the catalytic domain and a functionally complete set of Hyd maturation proteins are fundamental to achieving biosynthesis of catalytic [FeFe] hydrogenases. C1 NREL, Basic Sci Ctr, Golden, CO 80401 USA. Colorado Sch Mines, Dept Environm Sci & Engn, Golden, CO 80401 USA. RP King, PW (reprint author), NREL, Basic Sci Ctr, 1617 Cole Blvd,Mail 3313, Golden, CO 80401 USA. EM paul_king@nrel.gov RI King, Paul/D-9979-2011 OI King, Paul/0000-0001-5039-654X NR 52 TC 176 Z9 182 U1 5 U2 30 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 MAR PY 2006 VL 188 IS 6 BP 2163 EP 2172 DI 10.1128/JB.188.6.2163-2172.2006 PG 10 WC Microbiology SC Microbiology GA 021JQ UT WOS:000235979900016 PM 16513746 ER PT J AU Sainz, G Jakoncic, J Sieker, LC Stojanoff, V Sanishvili, N Asso, M Bertrand, P Armengaud, J Jouanneau, Y AF Sainz, G Jakoncic, J Sieker, LC Stojanoff, V Sanishvili, N Asso, M Bertrand, P Armengaud, J Jouanneau, Y TI Structure of a [2Fe-2S] ferredoxin from Rhodobacter capsulatus likely involved in Fe-S cluster biogenesis and conformational changes observed upon reduction SO JOURNAL OF BIOLOGICAL INORGANIC CHEMISTRY LA English DT Article DE ferredoxin; crystal structure; iron-sulfur cluster; redox potential; conformational changes ID IRON-SULFUR PROTEINS; ELECTRON-TRANSFER; ESCHERICHIA-COLI; CRYSTAL-STRUCTURE; VERTEBRATE-TYPE; AZOTOBACTER-VINELANDII; P450CAM MONOOXYGENASE; PSEUDOMONAS-PUTIDA; GENE-CLUSTER; ADRENODOXIN AB FdVI from Rhodobacter capsulatus is structurally related to a group of [2Fe-2S] ferredoxins involved in iron-sulfur cluster biosynthesis. Comparative genomics suggested that FdVI and orthologs found in alpha-Proteobacteria are involved in this process. Here, the crystal structure of FdVI has been determined for both the oxidized and the reduced protein. The [2Fe-2S] cluster lies 6 angstrom below the protein surface in a hydrophobic pocket without access to the solvent. This particular cluster environment might explain why the FdVI midpoint redox potential (-306 mV at pH 8.0) did not show temperature or ionic strength dependence. Besides the four cysteines that bind the cluster, FdVI features an extra cysteine which is located close to the S1 atom of the cluster and is oriented in a position such that its thiol group points towards the solvent. Upon reduction, the general fold of the polypeptide chain was almost unchanged. The [2Fe-2S] cluster underwent a conformational change from a planar to a distorted lozenge. In the vicinity of the cluster, the side chain of Met24 was rotated by 180 degrees, bringing its S atom within hydrogen-bonding distance of the S2 atom of the cluster. The reduced molecule also featured a higher content of bound water molecules, and more extensive hydrogen-bonding networks compared with the oxidized molecule. The unique conformational changes observed in FdVI upon reduction are discussed in the light of structural studies performed on related ferredoxins. C1 CEA Grenoble, CNRS,UMR 5092, Dept Reponse & Dynam Cellulaires, Lab Biochim & Biophys Syst, F-38054 Grenoble 9, France. European Synchrotron Radiat Facil, F-38054 Grenoble, France. Univ Washington, Dept Biol Struct, Seattle, WA 98195 USA. Argonne Natl Lab, Struct Biol Ctr, Midwest Ctr Struct Genom, Argonne, IL 60439 USA. CNRS, UPR 9036, Lab Bioenerget & Ingn Prot, F-13402 Marseille 20, France. CEA Valrho, DSV DIEP SBTN, F-30207 Bagnols Sur Ceze, France. RP Jouanneau, Y (reprint author), CEA Grenoble, CNRS,UMR 5092, Dept Reponse & Dynam Cellulaires, Lab Biochim & Biophys Syst, F-38054 Grenoble 9, France. EM yves.jouanneau@cea.fr RI stojanoff, vivian /I-7290-2012; OI stojanoff, vivian /0000-0002-6650-512X; ARMENGAUD, Jean/0000-0003-1589-445X FU NIGMS NIH HHS [GM 0080] NR 47 TC 16 Z9 17 U1 1 U2 6 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0949-8257 J9 J BIOL INORG CHEM JI J. Biol. Inorg. Chem. PD MAR PY 2006 VL 11 IS 2 BP 235 EP 246 DI 10.1007/s00775-005-0069-2 PG 12 WC Biochemistry & Molecular Biology; Chemistry, Inorganic & Nuclear SC Biochemistry & Molecular Biology; Chemistry GA 011LQ UT WOS:000235270100011 PM 16402206 ER PT J AU Lane, NE Yao, W Balooch, M Nalla, RK Balooch, G Habelitz, S Kinney, JH Bonewald, LF AF Lane, NE Yao, W Balooch, M Nalla, RK Balooch, G Habelitz, S Kinney, JH Bonewald, LF TI Glucocorticoid-treated mice have localized changes in trabecular bone material properties and osteocyte lacunar size that are not observed in placebo-treated or estrogen-deficient mice SO JOURNAL OF BONE AND MINERAL RESEARCH LA English DT Article DE glucocorticoids; mice; elastic modulus; mineralization; bone strength ID INDUCED OSTEOPOROSIS; VERTEBRAL FRACTURE; FORCE MODULATION; HIP FRACTURE; APOPTOSIS; OSTEOBLASTS; RESORPTION; THERAPY; HISTOMORPHOMETRY; NANOINDENTATION AB This study compares changes in bone microstructure in 6-month-old male GC-treated and female ovariectomized mice to their respective controls. In addition to a reduction in trabecular bone volume, GC treatment reduced bone mineral and elastic modulus of bone adjacent to osteocytes that was not observed in control mice nor estrogen-deficient mice. These microstructural changes in combination with the macrostructural changes could amplify the bone fragility in this metabolic bone disease. Introduction: Patients with glucocorticoid (GC)-induced secondary osteoporosis tend to fracture at higher bone mineral densities than patients with postmenopausal osteoporosis. This suggests that GCs may alter bone material properties in addition to BMD and bone macrostructure. Materials and Methods: Changes in trabecular bone structure, elastic modulus, and mineral to matrix ratio of the fifth lumbar vertebrae was assessed in prednisolone-treated mice and placebo-treated controls for comparison with estrogen-deficient mice and sham-operated controls. Compression testing of the third lumbar vertebrae was performed to assess whole bone strength. Results: Significant reductions in trabecular bone volume and whole bone strength occurred in both prednisolone-treated and estrogen-deficient mice compared with controls after 21 days (p < 0.05). The average elastic modulus over the entire surface of each trabecula was similar in all the experimental groups. However, localized changes within the trabeculae in areas surrounding the osteocyte lacunae were observed only in the prednisolone-treated mice. The size of the osteocyte lacunae was increased, reduced elastic modulus around the lacunae was observed, and a "halo" of hypomineralized bone surrounding the lacunae was observed. This was associated with reduced (nearly 40%) mineral to matrix ratio determined by Raman microspectroscopy. These localized changes in elastic modulus and bone mineral to matrix ratio were not observed in the other three experimental groups. Conclusions: Based on these results, it seems that GCs may have direct effects on osteocytes, resulting in a modification of their microenvironment. These changes, including an enlargement of their lacunar space and the generation of a surrounding sphere of hypomineralized bone, seem to produce highly localized changes in bone material properties that may influence fracture risk. C1 Univ Calif Davis, Med Ctr, Dept Med, Sacramento, CA 95817 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif San Francisco, Dept Prevent & Restorat Dent Sci, San Francisco, CA 94143 USA. Univ Missouri, Sch Dent, Dept Oral Biol, Kansas City, MO USA. RP Lane, NE (reprint author), Univ Calif Davis, Med Ctr, Dept Med, 4800 2nd Ave,Suite 2600, Sacramento, CA 95817 USA. EM nancy.lane@ucdmc.ucdavis.edu FU NCI NIH HHS [P50 CA095817]; NIAMS NIH HHS [1K24AR48841-02, K24 AR048841, P01 AR046798, P01 AR46798, R01 AR043052, R01 AR043052-07]; NICHD NIH HHS [R01 HD046661]; NIDDK NIH HHS [R01 DK46661-10] NR 45 TC 158 Z9 172 U1 0 U2 15 PU AMER SOC BONE & MINERAL RES PI WASHINGTON PA 2025 M ST, N W, STE 800, WASHINGTON, DC 20036-3309 USA SN 0884-0431 J9 J BONE MINER RES JI J. Bone Miner. Res. PD MAR PY 2006 VL 21 IS 3 BP 466 EP 476 DI 10.1359/JBMR.051103 PG 11 WC Endocrinology & Metabolism SC Endocrinology & Metabolism GA 016UE UT WOS:000235645100015 PM 16491295 ER PT J AU Brown, WM Martin, S Rintoul, MD Faulon, JL AF Brown, WM Martin, S Rintoul, MD Faulon, JL TI Designing novel polymers with targeted properties using the signature molecular descriptor brown SO JOURNAL OF CHEMICAL INFORMATION AND MODELING LA English DT Article ID LINEAR DIOPHANTINE EQUATIONS; EXTENDED VALENCE SEQUENCES; COMPUTER-AIDED-DESIGN; GLOBAL OPTIMIZATION; TOPOLOGICAL INDEXES; REQUIRED PROPERTIES; GENETIC ALGORITHM; QSAR; GRAPHS; SOLVENTS AB A method for solving the inverse quantitative structure-property relationship (QSPR) problem is presented which facilitates the design of novel polymers with targeted properties. Here, we demonstrate the efficacy of the approach using the targeted design of polymers exhibiting a desired glass transition temperature, heat capacity, and density. We present novel QSPRs based on the signature molecular descriptor capable of predicting glass transition temperature, heat capacity, density, molar volume, and cohesive energies of linear homopolymers with cross-validation squared correlation coefficients ranging between 0.81 and 0.95. Using these QSPRs, we show how the inverse problem can be solved to design poly(N-methyl hexamethylene sebacamide) despite the fact that the polymer was used not used in the training, of this model. C1 Sandia Natl Labs, Dept Computat Biol, Albuquerque, NM 87185 USA. Sandia Natl Labs, Dept Computat Biosci, Livermore, CA 94551 USA. RP Brown, WM (reprint author), Sandia Natl Labs, Dept Computat Biol, POB 5800, Albuquerque, NM 87185 USA. EM wmbrown@sandia.gov NR 42 TC 15 Z9 15 U1 1 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1549-9596 J9 J CHEM INF MODEL JI J. Chem Inf. Model. PD MAR-APR PY 2006 VL 46 IS 2 BP 826 EP 835 DI 10.1021/ic0504521 PG 10 WC Chemistry, Medicinal; Chemistry, Multidisciplinary; Computer Science, Information Systems; Computer Science, Interdisciplinary Applications SC Pharmacology & Pharmacy; Chemistry; Computer Science GA 028XT UT WOS:000236522800044 PM 16563014 ER PT J AU Lins, RD Rothlisberger, U AF Lins, RD Rothlisberger, U TI Influence of long-range electrostatic treatments on the folding of the N-terminal H4 histone tail peptide SO JOURNAL OF CHEMICAL THEORY AND COMPUTATION LA English DT Article ID MOLECULAR-DYNAMICS SIMULATIONS; PROTEIN SECONDARY STRUCTURE; PARTICLE MESH EWALD; GROMOS FORCE-FIELD; ARTIFICIAL PERIODICITY; SOLVATED POLYPEPTIDES; PARAMETER SET; CUTOFF SIZE; TRIFLUOROETHANOL; THERMODYNAMICS AB A series of ca. 20-ns molecular dynamics simulation runs of the N-terminal H4 histone tail in its un- and tetraacetylated forms were performed using three different long-range electrostatic treatments namely, spherical-cutoff, reaction field, and particle mesh Ewald. Comparison of the dynamical properties of the peptide reveals that internal flexibility and sampling of the conformational space are heavily dependent on the chosen method. Among the three tested methods, the particle mesh Ewald treatment yields the least conformational variation and a structural stabilization tendency around the initially defined topological framework. C1 Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland. RP Lins, RD (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM roberto.lins@pnl.gov RI Lins, Roberto/J-7511-2012 OI Lins, Roberto/0000-0002-3983-8025 NR 41 TC 20 Z9 20 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1549-9618 J9 J CHEM THEORY COMPUT JI J. Chem. Theory Comput. PD MAR-APR PY 2006 VL 2 IS 2 BP 246 EP 250 DI 10.1021/ct0501699 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 022LF UT WOS:000236056600004 PM 26626511 ER PT J AU Sodt, A Beran, GJO Jung, YS Austin, B Head-Gordon, M AF Sodt, A Beran, GJO Jung, YS Austin, B Head-Gordon, M TI A fast implementation of perfect pairing and imperfect pairing using the resolution of the identity approximation SO JOURNAL OF CHEMICAL THEORY AND COMPUTATION LA English DT Article ID AUXILIARY BASIS-SETS; ELECTRONIC-STRUCTURE; AB-INITIO; INTEGRAL APPROXIMATIONS; RI-MP2; EFFICIENCY; CHEMISTRY; ENERGY; MODEL; FIELD AB We present an efficient implementation of the perfect pairing and imperfect pairing coupled-cluster methods, as well as their nuclear gradients, using the resolution of the identity approximation to calculate two-electron integrals. The perfect pairing and imperfect pairing equations may be solved rapidly, making integral evaluation the bottleneck step. The method's efficiency is demonstrated for a series of linear alkanes, for which we show significant speedups (of approximately a factor of 10) with negligible error. We also apply the imperfect pairing method to a model of a recently synthesized stable singlet biradicaloid based on a planar GeN-Ge-N ring, confirming its biradical character, which appears to be remarkably high. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Sodt, A (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RI Beran, Gregory/B-8684-2011; Jung, Yousung/D-1676-2010 OI Beran, Gregory/0000-0002-2229-2580; Jung, Yousung/0000-0003-2615-8394 NR 34 TC 15 Z9 15 U1 0 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1549-9618 J9 J CHEM THEORY COMPUT JI J. Chem. Theory Comput. PD MAR-APR PY 2006 VL 2 IS 2 BP 300 EP 305 DI 10.1021/ct050239b PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 022LF UT WOS:000236056600011 PM 26626518 ER PT J AU Okur, A Wickstrom, L Layten, M Geney, R Song, K Hornak, V Simmerling, C AF Okur, A Wickstrom, L Layten, M Geney, R Song, K Hornak, V Simmerling, C TI Improved efficiency of replica exchange simulations through use of a hybrid explicit/implicit solvation model SO JOURNAL OF CHEMICAL THEORY AND COMPUTATION LA English DT Article ID MOLECULAR-DYNAMICS SIMULATIONS; FREE-ENERGY LANDSCAPE; POLYPROLINE II HELIX; GENERALIZED BORN; MONTE-CARLO; EXPLICIT SOLVENT; BETA-HAIRPIN; SIDE-CHAIN; BIOMOLECULAR SIMULATIONS; BIOLOGICAL MOLECULES AB The use of parallel tempering or replica exchange molecular dynamics (REMD) simulations has facilitated the exploration of free energy landscapes for complex molecular systems, but application to large systems is hampered by the scaling of the number of required replicas with increasing system size. Use of continuum solvent models reduces system size and replica requirements, but these have been shown to provide poor results in many cases, including overstabilization of ion pairs and secondary structure bias. Hybrid explicit/continuum solvent models can overcome some of these problems through an explicit representation of water molecules in the first solvation shells, but these methods typically require restraints on the solvent molecules and show artifacts in water properties due to the solvation interface. We propose an REMD variant in which the simulations are performed with a fully explicit solvent, but the calculation of exchange probability is carried out using a hybrid model, with the solvation shells calculated on the fly during the fully solvated simulation. The resulting reduction in the perceived system size in the REMD exchange calculation provides a dramatic decrease in the computational cost of REMD, while maintaining a very good agreement with results obtained from the standard explicit solvent REMD. We applied several standard and hybrid REMD methods with different solvent models to alanine polymers of 1, 3, and 10 residues, obtaining ensembles that were essentially independent of the initial conformation, even with explicit solvation. Use of only a continuum model without a shell of explicit water provided poor results for Ala(3) and Ala(10), with a significant bias in favor of the alpha-helix. Likewise, using only the solvation shells and no continuum model resulted in ensembles that differed significantly from the standard explicit solvent data. Ensembles obtained from hybrid REMD are in very close agreement with explicit solvent data, predominantly populating polyproline II conformations. Inclusion of a second shell of explicit solvent was found to be unnecessary for these peptides. C1 SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. SUNY Stony Brook, Grad Program Biochem & Struct Biol, Stony Brook, NY 11794 USA. SUNY Stony Brook, Grad Program Mol & Cellular Biol, Stony Brook, NY 11794 USA. SUNY Stony Brook, Ctr Struct Biol, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Computat Sci Ctr, Upton, NY 11973 USA. RP Simmerling, C (reprint author), SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. EM carlos.simmerling@stonybrook.edu NR 75 TC 87 Z9 87 U1 0 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1549-9618 J9 J CHEM THEORY COMPUT JI J. Chem. Theory Comput. PD MAR-APR PY 2006 VL 2 IS 2 BP 420 EP 433 DI 10.1021/ct050196z PG 14 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 022LF UT WOS:000236056600022 PM 26626529 ER PT J AU Zhang, Z Fenter, P Cheng, L Sturchio, NC Bedzyk, MJ Machesky, ML Anovitz, LM Wesolowski, DJ AF Zhang, Z Fenter, P Cheng, L Sturchio, NC Bedzyk, MJ Machesky, ML Anovitz, LM Wesolowski, DJ TI Zn2+ and Sr2+ adsorption at the TiO2 (110)-electrolyte interface: Influence of ionic strength, coverage, and anions SO JOURNAL OF COLLOID AND INTERFACE SCIENCE LA English DT Article DE electrical double layer; rutile; adsorption; oxide-aqueous inter-face; X-ray standing wave; multisite complexation; ionic strength ID RUTILE-WATER INTERFACE; RAY STANDING WAVES; ELECTRICAL DOUBLE-LAYER; GRAZING-INCIDENCE XAFS; METAL-OXIDE SURFACES; MOLECULAR-DYNAMICS; NACL MEDIA; SORPTION; MODEL; 250-DEGREES-C AB The X-ray standing wave technique was used to probe the sensitivity of Zn2+ and Sr2+ ion adsorption to changes in both the adsorbed ion coverage and the background electrolyte species and concentrations at the rutile alpha-TiO2 (110)-aqueous interface. Measurements were made with various background electrolytes (NaG, NaTr, RbCl, NaBr) at concentrations as high as I m. The results demonstrate that Zn2+ and Sr2+ reside primarily in the condensed layer and that the ion heights above the Ti-O surface plane are insensitive to ionic strength and the choice of background electrolyte (with < 0.1 angstrom changes over the full compositional range). The lack of any specific anion coadsorption upon probing with Br-, coupled with the insensitivity of Zn2+ and Sr2+ cation heights to changes in the background electrolyte, implies that anions do not play a significant role in the adsorption of these divalent metal ions to the rutile (110) surface. Absolute ion coverage measurements for Zn2+ and Sr2+ show a maximum Stern-layer coverage of similar to 0.5 monolayer, with no significant variation in height as a function of Stern-layer coverage. These observations are discussed in the context of Gouy-Chapman-Stem models of the electrical double layer developed from macroscopic sorption and pH-titration studies of rutile powder suspensions. Direct comparison between these experimental observations and the MUltiSIte Complexation (MUSIC) model predictions of cation surface coverage as a function of ionic strength revealed good agreement between measured and predicted surface coverages with no adjustable parameters. (c) 2005 Elsevier Inc. All rights reserved. C1 Argonne Natl Lab, Environm Res Div, Argonne, IL 60439 USA. Northwestern Univ, Inst Environm Catalysis, Evanston, IL 60208 USA. Univ Illinois, Chicago, IL 60607 USA. Illinois State Water Survey, Champaign, IL 61820 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Zhang, Z (reprint author), Argonne Natl Lab, Environm Res Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM zhanzhang@anl.gov RI Zhang, Zhan/A-9830-2008; Bedzyk, Michael/B-7503-2009; Cheng, Likwan/C-1436-2013; Bedzyk, Michael/K-6903-2013; Anovitz, Lawrence/P-3144-2016 OI Zhang, Zhan/0000-0002-7618-6134; Anovitz, Lawrence/0000-0002-2609-8750 NR 53 TC 27 Z9 28 U1 1 U2 18 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 MAR 1 PY 2006 VL 295 IS 1 BP 50 EP 64 DI 10.1016/j.jcis.2005.08.018 PG 15 WC Chemistry, Physical SC Chemistry GA 009GD UT WOS:000235098700006 PM 16150454 ER PT J AU Brunner, TA Urbatsch, TJ Evans, TM Gentile, NA AF Brunner, TA Urbatsch, TJ Evans, TM Gentile, NA TI Comparison of four parallel algorithms for domain decomposed implicit Monte Carlo SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE Monte Carlo methods; parallel computation; radiative transfer AB We consider four asynchronous parallel algorithms for Implicit Monte Carlo (IMC) thermal radiation transport on spatially decomposed meshes. Two of the algorithms are from the production codes KULL from Lawrence Liver-more National Laboratory and Milagro from Los Alamos National Laboratory. Improved versions of each of the existing algorithms are also presented. All algorithms were analyzed in an implementation of the KULL IMC package in ALEGRA, a Sandia National Laboratory high energy density physics code. The improved Milagro algorithm performed the best by scaling almost linearly out to 244 processors for well load balanced problems. (c) 2005 Elsevier Inc. All rights reserved. C1 Sandia Natl Labs, Target & Z Pinch Theory, Albuquerque, NM 87185 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Brunner, TA (reprint author), Sandia Natl Labs, Target & Z Pinch Theory, POB 5800, Albuquerque, NM 87185 USA. EM TABRUNN@sandia.gov NR 11 TC 14 Z9 14 U1 0 U2 3 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD MAR 1 PY 2006 VL 212 IS 2 BP 527 EP 539 DI 10.1016/j.jcp.2005.07.009 PG 13 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 995QY UT WOS:000234120100008 ER PT J AU Chacon, L Lapenta, G AF Chacon, L Lapenta, G TI A fully implicit, nonlinear adaptive grid strategy SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE grid generation; Newton-Krylov; fully implicit methods; multigrid; Beltrami equation; harmonic maps; moving mesh ID FINITE-ELEMENT-METHOD; NEWTON-KRYLOV METHOD; MOVING MESH METHODS; HARMONIC MAPS; RIEMANNIAN-MANIFOLDS; DIRECTIONAL CONTROL; GENERATION; RADIATION; SOLVER; EQUIDISTRIBUTION AB We propose an efficient, fully implicit, nonlinear solver for the Beltrami grid generation equation. The Beltrami equation is obtained using Harmonic map theory, and therefore the existence and uniqueness of a solution is guaranteed. The nonlinear solver strategy is based on Newton-Krylov methods, preconditioned here with a multigrid-based method for scalability. Numerical experiments performed for both grid adaptation and grid alignment are presented and demonstrate optimal scaling under grid refinement. We therefore conclude that such a fully nonlinear approach is indeed feasible and efficient. (c) 2005 Elsevier Inc. All rights reserved. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Chacon, L (reprint author), Los Alamos Natl Lab, Div Theoret, MS 4717,T-15, Los Alamos, NM 87545 USA. EM chacon@lanl.gov OI Chacon, Luis/0000-0002-4566-8763; Lapenta, Giovanni/0000-0002-3123-4024 NR 48 TC 9 Z9 11 U1 1 U2 3 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD MAR 1 PY 2006 VL 212 IS 2 BP 703 EP 717 DI 10.1016/j.jcp.2005.07.023 PG 15 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 995QY UT WOS:000234120100016 ER PT J AU Easther, R Lim, EA Martin, MR AF Easther, R Lim, EA Martin, MR TI Counting pockets with world lines in eternal inflation SO JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS LA English DT Article DE string theory and cosmology; inflation; quantum gravity phenomenology ID UNIVERSE SCENARIO; PERTURBATIONS; COSMOLOGY; CONSTANT; FLATNESS; HORIZON AB We consider the long standing puzzle of how to obtain meaningful probabilities in eternal inflation. We demonstrate a new algorithm for computing the probability distribution of pocket universe types, given a multivacua inflationary potential. The computed probability distribution is finite and manifestly gauge independent. We argue that in some scenarios this technique can be applied to disfavour some eternally inflating potentials. C1 Yale Univ, Dept Phys, New Haven, CT 06511 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Easther, R (reprint author), Yale Univ, Dept Phys, New Haven, CT 06511 USA. EM richard.easther@yale.edu; eugene.lim@yale.edu; mrmartin@lanl.gov OI Easther, Richard/0000-0002-7233-665X NR 33 TC 51 Z9 51 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 MAR PY 2006 IS 3 AR 016 DI 10.1088/1475-7516/2006/03/016 PG 16 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028ED UT WOS:000236468800003 ER PT J AU Navarro, I Santiago, J AF Navarro, I Santiago, J TI Unconventional cosmology on the (thick) brane SO JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS LA English DT Article DE extra dimensions; cosmology with extra dimensions; cosmological applications of theories with extra dimensions ID EXTRA DIMENSION; Z-GREATER-THAN-1; SUPERNOVAE; EXPANSION; EVOLUTION; CONSTANT; DYNAMICS; UNIVERSE; GRAVITY; VORTEX AB We consider the cosmology of a thick codimension 1 brane. We obtain the matching conditions leading to the cosmological evolution equations and show that when one includes matter with a pressure component along the extra dimension in the brane energy - momentum tensor, the cosmology is of non-standard type. In particular one can get acceleration when a dust of non-relativistic matter particles is the only source for the (modified) Friedman equation. Our equations would seem to violate the conservation of energy momentum from a 4D perspective, but in 5D the energy-momentum is conserved. One could write down an effective conserved 4D energy-momentum tensor attaching a 'dark energy' component to the energy-momentum tensor of matter that has pressure along the extra dimension. This extra component could, on a cosmological scale, be interpreted as matter-coupled quintessence. We comment on the effective 4D description of this effect in terms of the time evolution of a scalar field (the 5D radion) coupled to this kind of matter. C1 Univ Durham, Dept Phys, IPPP, Durham DH1 3LE, England. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Navarro, I (reprint author), Univ Durham, Dept Phys, IPPP, Durham DH1 3LE, England. EM ignacio.navarro@durham.ac.uk; jsantiag@fnal.gov RI Santiago, Jose/D-9109-2016 OI Santiago, Jose/0000-0003-3585-5626 NR 26 TC 9 Z9 9 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 MAR PY 2006 IS 3 AR 015 DI 10.1088/1475-7516/2006/03/015 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028ED UT WOS:000236468800004 ER PT J AU Specht, P Ho, JC Xu, X Armitage, R Weber, ER Erni, E Kisielowski, C AF Specht, P Ho, JC Xu, X Armitage, R Weber, ER Erni, E Kisielowski, C TI Zincblende and wurtzite phases in InN epilayers and their respective band transitions SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 2nd International Indium Nitride Workshop CY JAN 09-13, 2005 CL Kailua Kona, HI DE band transitions; characterization; VEELS; nitrides; polytypes ID ENERGY-LOSS SPECTROSCOPY; GAP AB Zincblende and wurtzite phases of InN are found in InN epilayers deposited by Molecular beam epitaxy on GaN buffers which were grown by metal organic chemical vapor deposition. Valence electron energy loss spectroscopy (VEELS) was applied to determine band transitions in both phases of InN. GaN buffer layers were used as VEELS reference. The chemistry and crystalline structure of the observed areas was recorded simultaneously to exclude a contribution from oxides and/or metal Clusters or extended defects Such as grain boundaries. At room temperature a band transition for wurtzite InN was found at (1.7 +/- 0.2) eV and for zincblende InN at (1.4 +/- 0.2)eV that are ascribed to the fundamental bandgaps of the respective polytypes. Those values correlate well with recent results of various research groups measuring the bandgap in InGaN alloys with VEELS. Published by Elsevier B.V. C1 Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA. RP Specht, P (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. EM specht@socrates.berkeley.edu RI Ho, Johnny/K-5275-2012 OI Ho, Johnny/0000-0003-3000-8794 NR 19 TC 7 Z9 8 U1 0 U2 0 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 MAR 1 PY 2006 VL 288 IS 2 BP 225 EP 229 DI 10.1016/j.jcrysgro.2005.12.002 PG 5 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 019RU UT WOS:000235855200003 ER PT J AU Waluklewicz, W Jones, RE Li, SX Yu, KM Ager, JW Haller, EE Lu, H Schaff, W AF Waluklewicz, W Jones, RE Li, SX Yu, KM Ager, JW Haller, EE Lu, H Schaff, W TI Dopants and defects in InN and InGaN alloys SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 2nd International Indium Nitride Workshop CY JAN 09-13, 2005 CL Kailua Kona, HI DE defects; doping; nitrides; semiconducting indium compounds ID SEMICONDUCTORS AB We have performed systematic studies of the effects of high-energy particle irradiation on the properties of InGaN alloys. In agreement with the amphoteric defect model, irradiation of InN produces donor-like defects. The electron concentration increases with increasing radiation dose and saturates at 4 X 10(20) cm(-3) at very high doses. We find that the increase of the electron concentration causes a large blue-shift of the absorption edge, which is well explained by the Burstein-Moss effect. The maximum electron concentration decreases with increasing Ga fraction in irradiated In1-xGaxN alloys as the conduction band edge approaches the Fermi level stabilization energy (E-FS). For x > 0.66 the conduction band edge moves above E-FS and the irradiation of n-type films produces acceptor-like defects, resulting in a reduced free electron concentration. An analysis of the concentration dependence of the electron mobility in InN indicates that the dominant defects in irradiated InN are triply charged donors. Finally, we show that InN films doped with Mg acceptors behave like undoped films above a threshold radiation dose. (c) 2006 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. Cornell Univ, Dept Elect & Comp Engn, Ithaca, NY 14853 USA. RP Waluklewicz, W (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM w_walukiewicz@lbl.gov RI Schaff, William/B-5839-2009; Yu, Kin Man/J-1399-2012; OI Yu, Kin Man/0000-0003-1350-9642; Ager, Joel/0000-0001-9334-9751 NR 18 TC 9 Z9 10 U1 0 U2 3 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 MAR 1 PY 2006 VL 288 IS 2 BP 278 EP 282 DI 10.1016/j.jcrysgro.2005.12.082 PG 5 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 019RU UT WOS:000235855200012 ER PT J AU Dong, CL Mattesini, M Augustsson, A Wen, XG Zhang, WX Yang, SH Persson, C Ahuja, R Luning, J Chang, CL Guo, JH AF Dong, CL Mattesini, M Augustsson, A Wen, XG Zhang, WX Yang, SH Persson, C Ahuja, R Luning, J Chang, CL Guo, JH TI Electronic structure and surface structure of Cu2S nanorods from polarization dependent X-ray absorption spectroscopy SO JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA LA English DT Article DE Cu2S nanorods; electronic structure; X-ray spectroscopy; ab initio multiple-scattering calculations ID SULFIDE NANOWIRE ARRAYS; CDSE NANOCRYSTALS; CRYSTAL-STRUCTURE; COPPER SURFACE; LOW CHALCOCITE; PARTICLE-SIZE; GROWTH; CARBON; NANOPARTICLES; STATE AB Highly aligned CuS nanorods have been studied by polarization dependent X-ray absorption spectroscopy. In contrast to bulk Cu2S, strong s, p, and d hybridization is found in the nanorods. The polarization dependence shows a predominant d(z2) character of Cu 3d states. Ab initio multiple-scattering calculations confirm the strong hybridization, and reveal that CuS nanorods are grown along the z-axis of chalcocite structure with Cu-7 and Cu-10 sites being the main building blocks. The hybridized absorption peak in the nanorods is shifted towards lower energies for smaller diameter of nanorods, which is attributed to surface reconstruction due to strong Cu-Cu interactions on the Cu-rich surface of the nanorods. (c) 2005 Elsevier B.V. All rights reserved. C1 Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA. Tamkang Univ, Dept Phys, Tamsui 25137, Taiwan. Uppsala Univ, Dept Phys, SE-75121 Uppsala, Sweden. Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China. Royal Inst Technol, Dept Mat Sci & Engn, SE-10044 Stockholm, Sweden. Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. RP Guo, JH (reprint author), Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA. EM jguo@lbl.gov RI Mattesini, Maurizio/B-8520-2009; OI Mattesini, Maurizio/0000-0002-7744-8626; Augustsson, Andreas/0000-0002-9463-3700; Chang, Ching-Lin/0000-0001-8547-371X; Yang, Shihe/0000-0002-6469-8415 NR 37 TC 2 Z9 2 U1 1 U2 17 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0368-2048 J9 J ELECTRON SPECTROSC JI J. Electron Spectrosc. Relat. Phenom. PD MAR PY 2006 VL 151 IS 1 BP 64 EP 70 DI 10.1016/j.elspec.2005.10.003 PG 7 WC Spectroscopy SC Spectroscopy GA 017GX UT WOS:000235683200012 ER PT J AU Fossum, AF Vianco, PT Neilsen, MK Pierce, DM AF Fossum, AF Vianco, PT Neilsen, MK Pierce, DM TI A practical viscoplastic damage model for lead-free solder SO JOURNAL OF ELECTRONIC PACKAGING LA English DT Article ID TERNARY 95.5SN-3.9AG-0.6CU SOLDER; PARAMETER-ESTIMATION; CREEP FRACTURE; INELASTIC FLOW; ROCK-SALT; COMPRESSION; BEHAVIOR; STRESS AB This paper summarizes the results of a program to construct an internal variable viscoplastic damage model to characterize 95.5Sn-3.9ft-0.6Cu (wt.%) lead-free solder tender cyclic thermomechanical loading conditions. A unified model is enhanced to account for a deteriorating microstructure through the use of an isotropic damage evolution equation. Model predictions versus experimental data are given for constant strain-rate tests that were conducted at strain rates of 4.2x10(-5) s(-1) and 8.3x10(-4) s(-1) over a temperature range front -25 degrees C to 160 degrees C; cyclic shear tests; and elevated-temperature creep tests. A description is given of how this work, supports larger ongoing efforts to develop a predictive capability in materials aging and reliability and solder interconnect reliability. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA. RP Fossum, AF (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM affossu@sandia.gov NR 24 TC 10 Z9 10 U1 0 U2 5 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 1043-7398 J9 J ELECTRON PACKAGING JI J. Electron. Packag. PD MAR PY 2006 VL 128 IS 1 BP 71 EP 81 DI 10.1115/1.2160514 PG 11 WC Engineering, Electrical & Electronic; Engineering, Mechanical SC Engineering GA 024ZT UT WOS:000236235800010 ER PT J AU Aceves, SM Martinez-Frias, J Reistad, GM AF Aceves, SM Martinez-Frias, J Reistad, GM TI Analysis of homogeneous charge compression ignition (HCCI) engines for cogeneration applications SO JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME LA English DT Article ID SYSTEM AB This paper presents an evaluation of the applicability of homogeneous charge compression ignition (HCCI) engines for small-scale cogeneration (< 1 MWe) in comparison to jive previously analyzed prime movers. The five comparator prime movers include stoichiometric spark-ignited (SI) engines, lean burn SI engines, diesel engines, microturbines, and fuel cells. The investigated option, HCCI engines, is a relatively new type of engine that has some fundamental differences with respect to other prime movers. The prime movers are compared by calculating electric and heating efficiency, fuel consumption, nitrogen oxide (NO(x)) emissions, and capital and fuel costs. Two cases are analyzed. In case 1, the cogeneration facility requires combined power and heating. In case 2, the requirement is for power and chilling. The results show that HCCI engines closely approach the very high fuel utilization efficiency of diesel engines without the high emissions of NOx and the expensive diesel fuel. HCCI engines offer a new alternative for cogeneration that provides a combination of low cost, high efficiency, low emissions, and flexibility in operating temperatures that can be optimally tuned for cogeneration systems. HCCI is the most efficient engine technology that meets the strict 2007 CARB NO(x) standards for cogeneration engines, and merits more detailed analysis and experimental demonstration. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Oregon State Univ, Coll Engn, Corvallis, OR 97331 USA. RP Aceves, SM (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,L-644, Livermore, CA 94551 USA. EM saceves@llnl.gov; Gordon.Reistad@oregonstate.edu RI aceves, salvador/G-9052-2011 OI aceves, salvador/0000-0001-5687-7256 NR 28 TC 9 Z9 9 U1 0 U2 1 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0195-0738 J9 J ENERG RESOUR-ASME JI J. Energy Resour. Technol.-Trans. ASME PD MAR PY 2006 VL 128 IS 1 BP 16 EP 27 DI 10.1115/1.2131883 PG 12 WC Energy & Fuels SC Energy & Fuels GA 015CU UT WOS:000235530300003 ER PT J AU Sharpe, GJ Bdzil, JB AF Sharpe, G. J. Bdzil, J. B. TI Interactions of inert confiners with explosives SO JOURNAL OF ENGINEERING MATHEMATICS LA English DT Article DE detonation; explosives; shock waves; transonic AB The deformation of an inert confiner by a steady detonation wave in an adjacent explosive is investigated for cases where the confiner is sufficiently strong (or the explosive sufficiently weak) such that the overall change in the sound speed of the inert is small. A coupling condition which relates the pressure to the deflection angle along the explosive-inert interface is determined. This includes its dependence on the thickness of the inert, for cases where the initial sound speed of the inert is less than or greater than the detonation speed in the explosive (supersonic and subsonic inert flows, respectively). The deformation of the inert is then solved by prescribing the pressure along the interface. In the supersonic case, the detonation drives a shock into the inert, subsequent to which the flow in the inert consists of alternating regions of compression and tension. In this case reverberations or 'ringing' occurs along both the deflected interface and outer edge of the inert. For the subsonic case, the flow in the interior of the inert is smooth and shockless. The detonation in the explosive initially deflects the smooth interface towards the explosive. For sufficiently thick inerts in such cases, it appears that the deflection of the confiner would either drive the detonation speed in the explosive up to the sound speed of the inert or drive a precursor wave ahead of the detonation in the explosive. Transonic cases, where the inert sound speed is close to the detonation speed, are also considered. It is shown that the confinement affect of the inert on the detonation is enhanced as sonic conditions are approached from either side. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Sharpe, GJ (reprint author), Univ Leeds, Sch Mech Engn, Leeds LS2 9JT, W Yorkshire, England. EM mengjs@leeds.ac.uk; jbb@lanl.gov NR 12 TC 9 Z9 9 U1 0 U2 7 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0022-0833 J9 J ENG MATH JI J. Eng. Math. PD MAR PY 2006 VL 54 IS 3 BP 273 EP 298 DI 10.1007/s10665-005-9025-y PG 26 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications SC Engineering; Mathematics GA 052ZJ UT WOS:000238272400005 ER PT J AU Holladay, JS Doll, WE Beard, LP Lee, JLC Bell, DT AF Holladay, JS Doll, WE Beard, LP Lee, JLC Bell, DT TI UXO time-constant estimation from helicopter-borne TEM data SO JOURNAL OF ENVIRONMENTAL AND ENGINEERING GEOPHYSICS LA English DT Article AB We have developed a new helicopter-borne transient electromagnetic system, known as ORAGS-TEM, which was designed for the detection of unexploded ordnance (UXO) through very low attitude measurements. This system has already achieved considerable success in demonstrations over prepared test grids and a bombing site at the former Badlands Bombing Range (BBR) in South Dakota. UXO ranging in size from 113 kg (250 lb) bombs to 60 mm illumination shells and 7 cm (2.75 in) rocket components were detected by both magnetometer and transient electromagnetic technologies during these trials, conducted in September, 2002. The signal/noise ratio (SNR) observed in TEM measurements during these trials was high, prompting us to ask, "What degree of UXO discrimination can be achieved through detailed analysis of this airborne TEM dataset?" Given the degree of spatial averaging and sampling limitations imposed by the system's flight height and speed, we felt that a very detailed analysis of the type performed by Pasion and Oldenburg would not be practical. Instead, we developed an improved transient analysis technique based on the Matrix Pencil Method to improve the accuracy of exponential decomposition of the observed transients. Where target SNR values of 10 or higher were present this method yielded repeatable results that reliably distinguished compact, long-time-constant targets such as bombs and artillery shells from short-time-constant targets Such as thin-walled scrap from practice bombs. As system sensitivity and resolution continues to improve, we expect that similar target discrimination methods will become standard data analysis tools. C1 Geosensors Inc, Toronto, ON, Canada. Battelle Oak Ridge Operat, Oak Ridge, TN USA. RP Holladay, JS (reprint author), Geosensors Inc, Toronto, ON, Canada. NR 24 TC 5 Z9 6 U1 0 U2 2 PU ENVIRONMENTAL ENGINEERING GEOPHYSICAL SOCIETY 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 MAR PY 2006 VL 11 IS 1 BP 43 EP 52 DI 10.2113/JEEG11.1.43 PG 10 WC Geochemistry & Geophysics; Engineering, Geological SC Geochemistry & Geophysics; Engineering GA 025LI UT WOS:000236267200005 ER PT J AU Whicker, JJ Pinder, JE Breshears, DD AF Whicker, JJ Pinder, JE Breshears, DD TI Increased wind erosion from forest wildfire: Implications for contaminant-related risks SO JOURNAL OF ENVIRONMENTAL QUALITY LA English DT Article ID SEMIARID SHRUBLAND; ERODED SEDIMENT; SOIL COVER; FIELD; CESIUM-137; REDISTRIBUTION; VARIABILITY; ECOSYSTEMS; LANDSCAPE; TRANSPORT AB Assessments of contaminant-related human and ecological risk require estimation of transport rates, but few data exist on wind-driven transport rates in nonagricultural systems, particularly in response to ecosystem disturbances such as forest wildfire and also relative to water-driven transport. The Cerro Grande wildfire in May of 2000 burned across ponderosa pine (Pinus ponderosa Douglas ex P.&C. Lawson var. scopulorum Englem.) forest within Los Alamos National Laboratory in northern New Mexico, where contaminant transport and associated post-fire inhalation risks are of concern. In response, the objectives of this study were to measure and compare wind-driven horizontal and vertical dust fluxes, metrics of transport related to wind erosion, for 3 yr for sites differentially affected by the Cerro Grande wildfire: unburned, moderately burned (fire mostly confined to ground vegetation), and severely burned (crown fire). Wind-driven dust flux was significantly greater in both types of burned areas relative to unburned areas, by more than one order of magnitude initially and by two to three times 1 yr after the fire. Unexpectedly, the elevated dust fluxes did not decrease during the second and third years in burned areas, apparently because ongoing drought delayed post-fire recovery. Our estimates enable assessment of amplification in contaminant-related risks following a major type of disturbance-wildfire, which is expected to increase in intensity and frequency due to climate change. More generally, our results highlight the importance of considering wind- as well as water-driven transport and erosion, particularly following disturbance, for ecosystem biogeochemistry in general and human and ecological risk assessment in particular. C1 Los Alamos Natl Lab, Hlth Phys Measurements Grp, Los Alamos, NM 87545 USA. Colorado State Univ, Dept Environm & Radiol Hlth Sci, Ft Collins, CO 80523 USA. Univ Arizona, Sch Nat Resources, Tucson, AZ 85721 USA. Inst Study Planet Earth, Tucson, AZ 85721 USA. Dept Ecol & Evolutionary Biol, Tucson, AZ 85721 USA. RP Whicker, JJ (reprint author), Los Alamos Natl Lab, Hlth Phys Measurements Grp, Mail Stop J573, Los Alamos, NM 87545 USA. EM jjwhicker@lanl.gov RI Breshears, David/B-9318-2009 OI Breshears, David/0000-0001-6601-0058 NR 70 TC 32 Z9 32 U1 0 U2 18 PU AMER SOC AGRONOMY PI MADISON PA 677 S SEGOE RD, MADISON, WI 53711 USA SN 0047-2425 J9 J ENVIRON QUAL JI J. Environ. Qual. PD MAR-APR PY 2006 VL 35 IS 2 BP 468 EP 478 DI 10.2134/jeq2005.0112 PG 11 WC Environmental Sciences SC Environmental Sciences & Ecology GA 020VY UT WOS:000235942300008 PM 16455847 ER PT J AU Chen, YT Chen, HJ Zhang, JS Hsieh, HT AF Chen, YT Chen, HJ Zhang, JS Hsieh, HT TI Theoretical analysis on the secondary flow in a rotating helical pipe with an elliptical cross section SO JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article DE secondary flow; curved pipe/duct; rotation; Coriolis force ID STEADY LAMINAR-FLOW; CURVED PIPE; VISCOUS-FLOW; FLUID; DUCTS; BIFURCATION AB In the present study, the flow in a rotating helical pipe with an elliptical cross section is considered. The axes of the elliptical cross section are in arbitrary directions. Using the perturbation method, the Navier-Stokes equations in a rotating helical coordinate system are solved. The combined effects of rotation, torsion, and geometry on the characteristics of secondary flow and fluid particle trajectory are discussed. Some new and interesting conclusions are obtained, such as how the number of secondary flow cells and the secondary flow intensity depends on the ratio of the Coroilis force to the centrifugal force. The results show that the increase of torsion has the tendency to transfer the structure of secondary flow into a saddle flow, and that the incline angle alpha increases or decreases the secondary flow intensity depending on the resultant force between the Corilois force and centrifugal force. C1 Univ Nevada, Dept Mech Engn, Las Vegas, NV 89154 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Chen, YT (reprint author), Univ Nevada, Dept Mech Engn, Las Vegas, NV 89154 USA. EM uuchen@nscee.edu RI Zhang, Jinsuo/H-4717-2012 OI Zhang, Jinsuo/0000-0002-3412-7769 NR 22 TC 2 Z9 2 U1 0 U2 4 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0098-2202 J9 J FLUID ENG-T ASME JI J. Fluids Eng.-Trans. ASME PD MAR PY 2006 VL 128 IS 2 BP 258 EP 265 DI 10.1115/1.2169818 PG 8 WC Engineering, Mechanical SC Engineering GA 028YA UT WOS:000236523500007 ER PT J AU Clevestig, P Pramanik, L Leitner, T Ehrnst, A AF Clevestig, P Pramanik, L Leitner, T Ehrnst, A TI CCR5 use by human immunodeficiency virus type 1 is associated closely with the gp120 V3 loop N-linked glycosylation site SO JOURNAL OF GENERAL VIROLOGY LA English DT Article ID AMINO-ACID; CORECEPTOR USAGE; IMPORTANT DETERMINANT; PHENOTYPE PREDICTION; EXTRACELLULAR LOOP; HIV-1; TROPISM; REGION; CXCR4; EFFICIENCY AB Human immunodeficiency virus type 1 (HIV-1) enters cells through the chemokine receptors CCR5 (R5 virus) and/or CXCR4 (X4 virus). Loss of N-linked glycans and increased net charge of the third variable loop (V3) of the gpl 20 envelope glycoprotein have been observed to be important steps towards CXCR4 use. All reported sequences using CCR5 or CXCR4 exclusively, or using both, were gathered from the Los Alamos HIV Database and analysed with regard to the V3 N-linked glycosylation motifs (sequons) and charge. The V3 loop glycan had a sensitivity of 0(.)98 and a 0(.)92 positive predictive value in the context of CCR5 use. The difference from X4 was remarkable (p < 10(-12)). Especially, the sequon motif NNT within the V3 loop was conserved in 99(.)2% of the major clades. The results suggest a close association between the V3 loop glycan and CCR5 use and may provide new insight into HIV-1 tropism and help to improve phenotype-prediction models. C1 Karolinska Univ Hosp Huddinge, Microbiol & Tumor Biol Ctr, SE-17177 Stockholm, Sweden. Karolinska Univ Hosp Huddinge, Dept Lab Med, Div Clin Virol, SE-17177 Stockholm, Sweden. Karolinska Inst, SE-17177 Stockholm, Sweden. Los Alamos Natl Lab, Theoret Biol & Biophys Grp, Los Alamos, NM USA. RP Ehrnst, A (reprint author), Karolinska Univ Hosp Huddinge, Microbiol & Tumor Biol Ctr, Box 280, SE-17177 Stockholm, Sweden. EM Anneka.Ehrnst@mtc.ki.se FU NIAID NIH HHS [Y1-AI-1500-04] NR 33 TC 41 Z9 41 U1 0 U2 1 PU SOC GENERAL MICROBIOLOGY PI READING PA MARLBOROUGH HOUSE, BASINGSTOKE RD, SPENCERS WOODS, READING RG7 1AG, BERKS, ENGLAND SN 0022-1317 J9 J GEN VIROL JI J. Gen. Virol. PD MAR PY 2006 VL 87 BP 607 EP 612 DI 10.1099/vir.0.81510-0 PN 3 PG 6 WC Biotechnology & Applied Microbiology; Virology SC Biotechnology & Applied Microbiology; Virology GA 018DM UT WOS:000235744000013 PM 16476981 ER PT J AU Lu, L Nakano, T Li, CH Fu, YS Miller, S Kuiken, C Robertson, BH Hagedorn, CH AF Lu, L Nakano, T Li, CH Fu, YS Miller, S Kuiken, C Robertson, BH Hagedorn, CH TI Hepatitis C virus complete genome sequences identified from China representing subtypes 6k and 6n and a novel, as yet unassigned subtype within genotype 6 SO JOURNAL OF GENERAL VIROLOGY LA English DT Article ID BLOOD-DONORS; MOLECULAR CHARACTERIZATION; NUCLEOTIDE-SEQUENCES; GENETIC GROUPS; CHIANG-MAI; HCV; NOMENCLATURE; VARIANTS; THAILAND; CLASSIFICATION AB Here, the complete genome sequences for three hepatitis C virus (HCV) variants identified from China and belonging to genotype 6 are reported: km41, km42 and gz52557. Their entire genome lengths were 9430, 9441 and 9448 nt, respectively; the 5' untranslated regions (UTRs) contained 341, 342 and 339 nt, followed by single open reading frames of 9045, 9045 and 9057 nt, respectively; the 3' UTRs, up to the poly(U) tracts, were 41, 51 and 52 nt, respectively. Phylogenetic analyses showed that km41 is classified into subtype 6k and km42 into subtype 6n. Although gz52557 clustered distantly with subtype 6g, it appeared to belong to a distinct subtype. Analysis with 53 and 105 partial core and NS5B region sequences, respectively, representing 17 subtypes from 6a to 6q and three unassigned isolates of genotype 6 in co-analyses demonstrated that gz52557 was equidistant from all of these isolates, indicating that it belongs to a novel subtype. However, based on a recent consensus that three or more examples are required for a new HCV subtype designation, it is suggested that gz52557 remains unassigned to any subtype. C1 Univ Kansas, Med Ctr, Dept Med, Div Gastroenterol & Hepatol, Kansas City, KS 66160 USA. Ichinomiya Nishi Hosp, Dept Internal Med, Aichi, Japan. Chinese Acad Sci, Kunming Inst Zool, Kunming, Peoples R China. Chinese Acad Sci, Grad Sch, Beijing, Peoples R China. Guangzhou Blood Ctr, Guangzhou, Guangdong, Peoples R China. Los Alamos Natl Lab, Los Alamos, NM USA. Ctr Dis Control & Prevent, Natl Ctr Infect Dis, Atlanta, GA 30333 USA. RP Lu, L (reprint author), Univ Kansas, Med Ctr, Dept Med, Div Gastroenterol & Hepatol, 4035 Delp,MS 1023, Kansas City, KS 66160 USA. EM llu@kumc.edu FU NCI NIH HHS [CA-063064]; NCRR NIH HHS [5 P 20 RR016443-04] NR 22 TC 18 Z9 19 U1 0 U2 1 PU SOC GENERAL MICROBIOLOGY PI READING PA MARLBOROUGH HOUSE, BASINGSTOKE RD, SPENCERS WOODS, READING RG7 1AG, BERKS, ENGLAND SN 0022-1317 J9 J GEN VIROL JI J. Gen. Virol. PD MAR PY 2006 VL 87 BP 629 EP 634 DI 10.1099/vir.0.81400-0 PN 3 PG 6 WC Biotechnology & Applied Microbiology; Virology SC Biotechnology & Applied Microbiology; Virology GA 018DM UT WOS:000235744000016 PM 16476984 ER PT J AU Daun, K Franca, F Larsen, M Leduc, G Howell, JR AF Daun, K Franca, F Larsen, M Leduc, G Howell, JR TI Comparison of methods for inverse design of radiant enclosures SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME LA English DT Article ID SYSTEMS AB A particular inverse design problem is proposed as a benchmark for comparison of five solution techniques used in design of enclosures with radiating sources. The enclosure is three-dimensional and includes some surfaces that are diffuse and others that are specular diffuse. Two aspect ratios are treated. The problem is completely described, and solutions are presented as obtained by the Tikhonov method, truncated singular value decomposition, conjugate gradient regularization, quasi-Newton minimization, and simulated annealing. All of the solutions use a common set of exchange factors computed by Monte Carlo, and smoothed by a constrained maximum likelihood estimation technique that imposes conservation, reciprocity, and non-negativity Solutions obtained by the various methods ore presented and compared, and the relative advantages and disadvantages of these methods are summarized. C1 Natl Res Council Canada, Ottawa, ON, Canada. Univ Fed Rio Grande do Sul, Porto Alegre, RS, Brazil. Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Toulouse 3, Lab Energet, F-31062 Toulouse, France. Univ Texas, Austin, TX 78712 USA. RP Daun, K (reprint author), Natl Res Council Canada, Ottawa, ON, Canada. NR 23 TC 27 Z9 27 U1 0 U2 2 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0022-1481 J9 J HEAT TRANS-T ASME JI J. Heat Transf.-Trans. ASME PD MAR PY 2006 VL 128 IS 3 BP 269 EP 282 DI 10.1115/1.2151198 PG 14 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA 021TV UT WOS:000236009600007 ER PT J AU Fedewa, LA AF Fedewa, LA TI Fluctuating gram-negative microflora in developing anurans SO JOURNAL OF HERPETOLOGY LA English DT Article ID AMPHIBIAN METAMORPHOSIS; IMMUNE-SYSTEM; XENOPUS-LAEVIS; RANA-PIPIENS; MORTALITY; TOADS; FROGS; SIZE; INFECTION; PREDATION AB Enteric bacterial communities from Southern Toads (Bufo terrestris) and Spring Peepers (Pseudacris crucifer) were quantified during larval development and metamorphosis to examine relationships between development and enteric microflora. Higher levels of enteric Gram-negative bacteria were observed during metamorphosis in each species' intestines. Gut content had no effect on bacterial levels in B. terrestris. Much higher bacterial levels were recorded in smaller metamorphs. The results of this research suggest that enteric microflora may play an ecological role in anuran development and metamorphosis. C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. RP Fedewa, LA (reprint author), Univ Georgia, Savannah River Ecol Lab, PO Drawer E, Aiken, SC 29802 USA. NR 38 TC 3 Z9 3 U1 1 U2 5 PU SOC STUDY AMPHIBIANS REPTILES PI ST LOUIS PA C/O ROBERT D ALDRIDGE, ST LOUIS UNIV, DEPT BIOLOGY, 3507 LACLEDE, ST LOUIS, MO 63103 USA SN 0022-1511 J9 J HERPETOL JI J. Herpetol. PD MAR PY 2006 VL 40 IS 1 BP 131 EP 135 DI 10.1670/104-04N.1 PG 5 WC Zoology SC Zoology GA 031OS UT WOS:000236714500020 ER PT J AU Chiou, DW Ganor, OJ Kim, BS AF Chiou, DW Ganor, OJ Kim, BS TI A deformation of twistor space and a chiral mass term in N=4 super Yang-Mills Theory SO JOURNAL OF HIGH ENERGY PHYSICS LA English DT Article DE superspaces; topological strings; duality in gauge field theories; topological field theories ID TOPOLOGICAL STRINGS; GAUGE-THEORY; DUALITY AB Super twistor space admits a certain (super) complex structure deformation that preserves the Poincare subgroup of the symmetry group PSL(4 vertical bar 4) and depends on 10 parameters. In a previous paper [1], it was proposed that in twistor string theory this deformation corresponds to augmenting N = 4 super Yang-Mills theory by a mass term for the left-chirality spinors. In this paper we analyze this proposal in more detail. We calculate 4-particle scattering amplitudes of fermions, gluons and scalars and show that they are supported on holomorphic curves in the deformed twistor space. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. EM dwchiou@socrates.berkeley.edu; origa@socrates.berkeley.edu; bskim@socrates.berkeley.edu NR 46 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1029-8479 J9 J HIGH ENERGY PHYS JI J. High Energy Phys. PD MAR PY 2006 IS 3 AR 027 PG 45 WC Physics, Particles & Fields SC Physics GA 029RU UT WOS:000236582900078 ER PT J AU Freivogel, B Hubeny, VE Maloney, A Myers, RC Rangamani, M Shenker, S AF Freivogel, B Hubeny, VE Maloney, A Myers, RC Rangamani, M Shenker, S TI Inflation in AdS/CFT SO JOURNAL OF HIGH ENERGY PHYSICS LA English DT Article DE dS vacua in string theory; AdS-CFT correspondence ID FALSE-VACUUM BUBBLES; HETEROTIC M-THEORY; STRING THEORY; DOMAIN-WALLS; BLACK-HOLES; UNIVERSE; STABILIZATION; MANIFOLDS; DYNAMICS; FLUXES AB We study the AdS/CFT correspondence as a probe of inflation. We assume the existence of a string landscape containing at least one stable AdS vacuum and a ( nearby) metastable de Sitter state. Standard arguments imply that the bulk physics in the vicinity of the AdS minimum is described by a boundary CFT. We argue that large enough bubbles of the dS phase, including those able to inflate, are described by mixed states in the CFT. Inflating degrees of freedom are traced over and do not appear explicitly in the boundary description. They nevertheless leave a distinct imprint on the mixed state. Analytic continuation allows us, in principle, to recover a large amount of nonperturbatively defined information about the inflating regime. Our work also shows that no scattering process can create an inflating region, even by quantum tunneling, since a pure state can never evolve into a mixed state under unitary evolution. C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA. LBNL, Dept Phys, Berkeley, CA 94720 USA. LBNL, Theoret Phys Grp, Berkeley, CA 94720 USA. Univ Durham, Dept Math Sci, Durham DH1 3LE, England. Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada. Univ Waterloo, Dept Phys, Waterloo, ON N2L 3G1, Canada. RP Freivogel, B (reprint author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA. EM freivogel@berkeley.edu; veronika.hubeny@durham.ac.uk; maloney@slac.stanford.edu; rmyers@perimeterinstitute.ca; mukund.rangamani@durham.ac.uk; sshenker@stanford.edu NR 89 TC 63 Z9 63 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1029-8479 J9 J HIGH ENERGY PHYS JI J. High Energy Phys. PD MAR PY 2006 IS 3 AR 007 DI 10.1088/1126-6708/2006/03/007 PG 52 WC Physics, Particles & Fields SC Physics GA 029RU UT WOS:000236582900098 ER PT J AU Giryavets, A AF Giryavets, A TI New attractors and area codes SO JOURNAL OF HIGH ENERGY PHYSICS LA English DT Article DE black holes in string theory; superstring vacua; flux compactifications ID CALABI-YAU COMPACTIFICATIONS; BLACK-HOLES AB In this note we give multiple examples of the recently proposed New Attractors describing supersymmetric flux vacua and non-supersymmetric extremal black holes in IIB string theory. Examples of non-supersymmetric extremal black hole attractors arise on a hypersurface in WP1,1,1,1,24. For flux vacua on the orientifold of the same hypersurface existence of multiple basins of attraction is established. It is explained that certain fluxes may give rise to multiple supersymmetric flux vacua in a finite region on moduli space, say at the mirror of Landau-Ginzburg point and close to conifold point. This suggests the existence of multiple basins for flux vacua and domain walls in the landscape for a fixed flux and at interior points in moduli space. C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Univ, SLAC, Stanford, CA 94305 USA. RP Giryavets, A (reprint author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA. EM giryav@stanford.edu NR 25 TC 36 Z9 36 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1029-8479 J9 J HIGH ENERGY PHYS JI J. High Energy Phys. PD MAR PY 2006 IS 3 AR 020 DI 10.1088/1126-6708/2006/03/020 PG 14 WC Physics, Particles & Fields SC Physics GA 029RU UT WOS:000236582900085 ER PT J AU Kallosh, R Sivanandam, N Soroush, M AF Kallosh, R Sivanandam, N Soroush, M TI The non-BPS black hole attractor equation SO JOURNAL OF HIGH ENERGY PHYSICS LA English DT Article DE black holes; superstring vacua; black holes in string theory ID SUPERGRAVITY; SUPERSYMMETRY; MANIFOLDS; SYMMETRY; DUALITY; ENTROPY; MODULI; SPACE AB We study the attractor mechanism for extremal non-BPS black holes with an infinite throat near horizon geometry, developing, as we do so, a physical argument as to why such a mechanism does not exist in non-extremal cases. We present a detailed derivation of the non-supersymmetric attractor equation. This equation defines the stabilization of moduli near the black hole horizon: the fixed moduli take values specified by electric and magnetic charges corresponding to the fluxes in a Calabi Yau compactification of string theory. They also define the so-called double-extremal solutions. In some examples, studied previously by Tripathy and Trivedi, we solve the equation and show that the moduli are fixed at values which may also be derived from the critical points of the black hole potential. C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Univ, SLAC, Stanford, CA 94309 USA. RP Kallosh, R (reprint author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA. EM kallosh@stanford.edu; navins@stanford.edu; soroush@stanford.edu NR 30 TC 94 Z9 94 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1029-8479 J9 J HIGH ENERGY PHYS JI J. High Energy Phys. PD MAR PY 2006 IS 3 AR 060 DI 10.1088/1126-6708/2006/03/060 PG 31 WC Physics, Particles & Fields SC Physics GA 029RU UT WOS:000236582900045 ER PT J AU Pines, A AF Pines, A TI Erwin L Hahn - Scientist, Mentor, Friend SO JOURNAL OF MAGNETIC RESONANCE LA English DT Biographical-Item C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Pines, A (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM Pines@berkeley.edu NR 1 TC 1 Z9 1 U1 1 U2 3 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 1090-7807 J9 J MAGN RESON JI J. Magn. Reson. PD MAR PY 2006 VL 179 IS 1 BP 5 EP 7 DI 10.1016/j.jmr.2006.01.012 PG 3 WC Biochemical Research Methods; Physics, Atomic, Molecular & Chemical; Spectroscopy SC Biochemistry & Molecular Biology; Physics; Spectroscopy GA 035CM UT WOS:000236977600002 PM 16527504 ER PT J AU Maryasov, AG Bowman, MK AF Maryasov, AG Bowman, MK TI Two-dimensional hyperfine sublevel correlation spectroscopy: Powder features for S=1/2, I=1 SO JOURNAL OF MAGNETIC RESONANCE LA English DT Article DE ESE EM; HYSCORE; 2D spectroscopy; catastrophe theory; nitrogen nucleus; hyperfine interaction; singularity patterns; mapping; quadrupolar interaction; fold; cusp ID HYSCORE SPECTRA; SPIN SYSTEMS; ORIENTATION; CATASTROPHE; TRIPLE; ESEEM AB The lineshapes of two-dimensional magnetic resonance spectra of disordered or partially ordered solids are dominated by ridges of singularities in the frequency plane. The positions of these ridges are described by a branch of mathematics known as catastrophe theory concerning the mapping of one 2D surface onto another. We systematically consider the characteristics of HYSCORE spectra for paramagnetic centers having electron spin S = 1/2 and nuclear spin 1 = 1 in terms of singularities using an exact solution of the nuclear spin Hamiltonian. The lineshape characteristics are considered for several general cases: zero nuclear quadrupole coupling; isotropic hyperfine but arbitrary nuclear quadrupole couplings; coincident principal axes for the nuclear hyperfine and quadrupole tensors; and the general case of arbitrary nuclear quadrupole and hyperfine tensors. The patterns of singularities in the HYSCORE spectra are described for each case. (c) 2005 Elsevier Inc. All rights reserved. C1 Russian Acad Sci, Inst Chem Kinet & Combust, Siberian Branch, Novosibirsk 650090, Russia. Battelle Pacific NW Labs, Struct Biol & Microimaging, Richland, WA 99354 USA. RP Maryasov, AG (reprint author), Russian Acad Sci, Inst Chem Kinet & Combust, Siberian Branch, Novosibirsk 650090, Russia. EM maryasov@ns.kinetics.nsc.ru RI Bowman, Michael/F-4265-2011 OI Bowman, Michael/0000-0003-3464-9409 FU NIGMS NIH HHS [GM61904] NR 24 TC 10 Z9 10 U1 0 U2 11 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 1090-7807 J9 J MAGN RESON JI J. Magn. Reson. PD MAR PY 2006 VL 179 IS 1 BP 120 EP 135 DI 10.1016/j.jmr.2005.11.013 PG 16 WC Biochemical Research Methods; Physics, Atomic, Molecular & Chemical; Spectroscopy SC Biochemistry & Molecular Biology; Physics; Spectroscopy GA 035CM UT WOS:000236977600016 PM 16337820 ER PT J AU Mossle, M Han, SI Myers, WR Lee, SK Kelso, N Hatridge, M Pines, A Clarke, J AF Mossle, M Han, SI Myers, WR Lee, SK Kelso, N Hatridge, M Pines, A Clarke, J TI SQUID-detected microtesla MRI in the presence of metal SO JOURNAL OF MAGNETIC RESONANCE LA English DT Article DE magnetic resonance imaging; SQUID detection; low held; susceptibility artifacts; RF screening ID QUANTUM INTERFERENCE DEVICE; MAGNETIC-RESONANCE IMAGES; FIELD; ARTIFACTS; ENHANCEMENT; NMR AB In magnetic resonance imaging performed at fields of I T and above, the presence of a metal insert can distort the image because of susceptibility differences within the sample and modification of the radiofrequency fields by screening currents. Furthermore, it is not feasible to perform nuclear magnetic resonance (NMR) spectroscopy or acquire a magnetic resonance image if the sample is enclosed in a metal container. Both problems can be overcome by substantially lowering the NMR frequency. Using a microtesla imaging system operating at 2.8 kHz, with a superconducting quantum interference device as the signal detector, we have obtained distortion-free images of a phantom containing a titanium bar and three-dimensional images of an object enclosed in an aluminum can; in both cases high-field images are inaccessible. (c) 2005 Elsevier Inc. All rights reserved. C1 Lawrence Berkeley Lab, Dept Phys, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Dept Chem, Berkeley, CA 94720 USA. RP Mossle, M (reprint author), Lawrence Berkeley Lab, Dept Phys, Berkeley, CA 94720 USA. EM moessle@lbl.gov RI Han, Songi/E-4723-2012; Lee, Seung-Kyun/A-3464-2008 OI Han, Songi/0000-0001-6489-6246; Lee, Seung-Kyun/0000-0001-7625-3141 NR 23 TC 58 Z9 58 U1 4 U2 9 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 1090-7807 J9 J MAGN RESON JI J. Magn. Reson. PD MAR PY 2006 VL 179 IS 1 BP 146 EP 151 DI 10.1016/j.jmr.2005.11.005 PG 6 WC Biochemical Research Methods; Physics, Atomic, Molecular & Chemical; Spectroscopy SC Biochemistry & Molecular Biology; Physics; Spectroscopy GA 035CM UT WOS:000236977600019 PM 16310385 ER PT J AU Rar, A Pharr, GM Oliver, WC Karapetian, E Kalinin, SV AF Rar, A Pharr, GM Oliver, WC Karapetian, E Kalinin, SV TI Piezoelectric nanoindentation SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID THIN-FILMS; INDENTATION AB Piezoelectric nanoindentation (PNI) has been developed to quantitatively address electromechanical coupling and pressure-induced dynamic phenomena in ferroelectric materials on the nanoscale. In PNI, an oscillating voltage is applied between the back side of the sample and the indenter tip, and the first harmonic of bias-induced surface displacement at the area of indenter contact is detected. PNI is implemented using a standard nanoindentation system equipped with a continuous stiffness measurement system. The piezoresponse of polycrystalline lead zirconate titanate (PZT) and BaTiO3 piezoceramics was studied during a standard nanoindentation experiment. For PZT, the response was found to be load independent, in agreement with theoretical predictions. In polycrystalline barium titanate, a load dependence of the piezoresponse was observed. The potential of piezoelectric nanoindentation for studies of phase transitions and local structure-property relations in piezoelectric materials is discussed. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. MTS Corp, Oak Ridge, TN 37831 USA. Suffolk Univ, Boston, MA 02108 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Rar, A (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. EM rara@ornl.gov; sergei2@ornl.gov RI Kalinin, Sergei/I-9096-2012 OI Kalinin, Sergei/0000-0001-5354-6152 NR 14 TC 33 Z9 34 U1 3 U2 19 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD MAR PY 2006 VL 21 IS 3 BP 552 EP 556 DI 10.1557/JMR.2006.0081 PG 5 WC Materials Science, Multidisciplinary SC Materials Science GA 018SU UT WOS:000235785900003 ER PT J AU Moriarty, JA Benedict, LX Glosli, JN Hood, RQ Orlikowski, DA Patel, MV Soderlind, P Streitz, FH Tang, MJ Yang, LH AF Moriarty, JA Benedict, LX Glosli, JN Hood, RQ Orlikowski, DA Patel, MV Soderlind, P Streitz, FH Tang, MJ Yang, LH TI Robust quantum-based interatomic potentials for multiscale modeling in transition metals SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID GENERALIZED PSEUDOPOTENTIAL THEORY; DENSITY-FUNCTIONAL FORMULATION; MOLYBDENUM SINGLE-CRYSTALS; ATOMISTIC SIMULATION; SCREW DISLOCATIONS; BCC TANTALUM; FLOW-STRESS; TA; PRESSURE; MO AB First-principles generalized pseudopotential theory (GPT) provides a fundamental basis for transferable multi-ion interatomic potentials in transition metals and alloys within density-functional quantum mechanics. In the central body-centered cubic (bcc) metals, where multi-ion angular forces are important to materials properties, simplified model GPT (MGPT) potentials have been developed based on canonical d bands to allow analytic forms and large-scale atomistic simulations. Robust, advanced-generation MGPT potentials have now been obtained for Ta and Mo and successfully applied to a wide range of structural, thermodynamic, defect, and mechanical properties at both ambient and extreme conditions. Selected applications to multiscale modeling discussed here include dislocation core structure and mobility, atomistically informed dislocation dynamics simulations of plasticity, and thermoelasticity and high-pressure strength modeling. Recent algorithm improvements have provided a more general matrix representation of MGPT beyond canonical bands, allowing improved accuracy and extension to f-electron actinide metals, an order of magnitude increase in computational speed for dynamic simulations, and the development of temperature-dependent potentials. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM moriarty2@llnl.gov OI Patel, Mehul/0000-0002-0486-010X NR 37 TC 34 Z9 34 U1 1 U2 13 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 MAR PY 2006 VL 21 IS 3 BP 563 EP 573 DI 10.1557/JMR.2006.0070 PG 11 WC Materials Science, Multidisciplinary SC Materials Science GA 018SU UT WOS:000235785900005 ER PT J AU Venkataraman, S Scudino, S Eckert, J Gemming, T Mickel, C Schultz, L Sordelet, DJ AF Venkataraman, S Scudino, S Eckert, J Gemming, T Mickel, C Schultz, L Sordelet, DJ TI Nanocrystallization of gas atomized Cu47Ti33Zr11Ni8Si1 metallic glass SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID ENTHALPY RELAXATION BEHAVIOR; BASE AMORPHOUS-ALLOYS; PHASE-SEPARATION; STRUCTURAL RELAXATION; SUPERCOOLED LIQUID; PRIMARY CRYSTALLIZATION; TEMPERATURE; DECOMPOSITION; NI; NUCLEATION AB Cu47Ti33Zr11Ni8Si1 metallic glass powder was prepared by gas atomization. Decomposition in the amorphous alloy and primary crystallization has been studied by differential scanning calorimetry (DSC), x-ray diffraction (XRD), and transmission electron microscopy (TEM). The glassy powder exhibits a broad DSC exotherm prior to bulk crystallization. Controlled annealing experiments reveal that this exotherm corresponds to a combination of structural relaxation and nanocrystallization. A uniform featureless amorphous contrast is observed in the TEM prior to the detection of nanocrystals of 4-6 nm in size. High-resolution TEM studies indicate that this nanocrystalline phase has a close crystallographic relationship with the gamma-CuTi phase having a tetragonal structure. The product of the main crystallization event is also nanocrystalline, hexagonal Cu51Zr14, having dimensions of 20 nm. However, there is no evidence for possible amorphous phase separation prior to the nanocrystallization events. C1 Leibniz Inst Festkorper & Werkstofforsch Dresden, IFW, Inst Met Werkstoffe, D-01171 Dresden, Germany. Tech Univ Darmstadt, Fachgebiet Phys Metallkunde11 Mat & Geowissenscha, D-64287 Darmstadt, Germany. Leibniz Inst Festkorper & Werkstofforsch Dresden, IFW, Inst Festkorperanalyt & Strukurforsch, D-01171 Dresden, Germany. Iowa State Univ, Ames Lab, US DOE, Mat & Engn Phys Program, Ames, IA 50014 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50014 USA. RP Venkataraman, S (reprint author), Leibniz Inst Festkorper & Werkstofforsch Dresden, IFW, Inst Met Werkstoffe, D-01171 Dresden, Germany. EM s.venkataraman@phm.tu-darmstadt.de RI Schultz, Ludwig/B-3383-2010; Gemming, Thomas/D-3920-2015; Scudino, Sergio/D-8049-2015 OI Gemming, Thomas/0000-0002-7353-595X; NR 74 TC 13 Z9 13 U1 0 U2 2 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD MAR PY 2006 VL 21 IS 3 BP 597 EP 607 DI 10.1557/JMR.2006.0072 PG 11 WC Materials Science, Multidisciplinary SC Materials Science GA 018SU UT WOS:000235785900008 ER PT J AU Hossain, M Meyer, HM Abu-Safe, HH Naseem, H Brown, WD AF Hossain, M Meyer, HM Abu-Safe, HH Naseem, H Brown, WD TI Large-grain poly-crystalline silicon thin films prepared by aluminum-induced crystallization of sputter-deposited hydrogenated amorphous silicon SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID X-RAY-DIFFRACTION; SI-H; LAYER AB A metal-induced crystallization (MIC) technique was used to produce large-grain poly-crystalline silicon. Two sets of samples were prepared by first sputting onto glass substrates. For one set of samples, hydrogenated amorphous silicon (a-Si:H) was sputtered on top of the Al without breaking the vacuum. For the second set, the samples were taken out of the vacuum chamber and exposed to the atmosphere to Grow a very thin layer of native aluminum oxide before sputter depositing the a-Si:H. Both sets of samples were then annealed at temperatures between 400 and 525 degrees C for 40 min. X-ray diffraction patterns confirmed the crystallization of the samples. Scanning Auger microanalysis was used to confirm that the a-Si:H and Al layers exchanged positions in this structure during the crystallization process. Auger mapping revealed the formation of large grain poly-silicon (10-20 mu m). A model is proposed to explain how the crystallization process progresses with anneal temperature. C1 Univ Arkansas, Dept Elect Engn, Fayetteville, AR 72701 USA. Oak Ridge Natl Lab, Microscopy Microanal & Microstruct Grp, Met & Ceram Div, Oak Ridge, TN 37831 USA. RP Hossain, M (reprint author), Univ Arkansas, Dept Elect Engn, Fayetteville, AR 72701 USA. EM maruf72703@yahoo.com NR 13 TC 8 Z9 8 U1 0 U2 3 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD MAR PY 2006 VL 21 IS 3 BP 761 EP 766 DI 10.1557/JMR.2006.0091 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA 018SU UT WOS:000235785900028 ER PT J AU Bhuiyan, MS Paranthaman, M Goyal, A Heatherly, L Beach, DB AF Bhuiyan, MS Paranthaman, M Goyal, A Heatherly, L Beach, DB TI Deposition of rare earth tantalate buffers on textured Ni-W substrates for YBCO coated conductor using chemical solution deposition approach SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID THIN-FILMS; SUPERCONDUCTING FILMS; DIELECTRIC-PROPERTIES; MOD APPROACH; PYROCHLORES; LAYERS; GROWTH; FABRICATION; PLUTONIUM; FLUORITE AB Epitaxial films of rare-earth (RE = La, Ce, Eu, and Gd) tantalates, RE3TaO7 with pyrochlore structures were grown on biaxially textured nickel-3 at.% tungsten (Ni-W) substrates using chemical solution deposition (CSD) process. Precursor solution of 0.3 similar to 0.4 M concentration of total cations were spin coated on to short samples of Ni-W substrates and the films were crystallized at 1050 similar to 1100 degrees C in a gas mixture of Ar-4% H-2 for 15 to 60 min. X-ray studies show that the films of pyrochlore RE tantalate films are highly textured with cube-on-cube epitaxy. Improved texture was observed in case of lanthanum tantalate (La3TaO7) film grown on Ni-W substrates. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) investigations of RE3TaO7 films reveal a fairly dense and smooth microstructure without cracks and porosity. The rare-earth tantalate layers may be potentially used as buffer layers for YBa2Cu3O7-delta (YBCO) coated conductors. C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Met & Ceram Div, Oak Ridge, TN 37831 USA. RP Bhuiyan, MS (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM s9r@ornl.gov RI Paranthaman, Mariappan/N-3866-2015 OI Paranthaman, Mariappan/0000-0003-3009-8531 NR 31 TC 6 Z9 7 U1 3 U2 4 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD MAR PY 2006 VL 21 IS 3 BP 767 EP 773 DI 10.1557/JMR.2006.0099 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA 018SU UT WOS:000235785900029 ER PT J AU Ye, XR Daraio, C Wang, C Talbot, JB Jin, S AF Ye, XR Daraio, C Wang, C Talbot, JB Jin, S TI Room temperature solvent-free synthesis of monodisperse magnetite nanocrystals SO JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY LA English DT Article DE room temperature; solvent-free synthesis; monodispersed; magnetite nanocrystals ID SOLID-STATE REACTIONS; GAMMA-FE2O3 NANOPARTICLES; ULTRAFINE PARTICLES; BIOMEDICINE; SUPERLATTICES AB We have successfully demonstrated a facile, solvent-free synthesis of highly crystalline and monodisperse Fe3O4 nanocrystallites at ambient temperature avoiding any heating. Solid state reaction of inorganic Fe(II) and Fe(III) salts with NaOH was found to produce highly crystalline Fe3O4 nanoparticles. The reaction, if carried out in the presence of surfactant such as oleic acid-oleylamine adduct, generated monodisperse Fe3O4 nanocrystals extractable directly from the reaction mixture. The extracted nanoparticles were capable of forming self-assembled, two-dimensional and uniform periodic array. The new process Utilizes inexpensive and nontoxic starting materials, and does not require a use of high boiling point and toxic solvents, thus is amenable to an environmentally desirable, large-scale synthesis;of nanocrystals. C1 Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Jin, S (reprint author), Univ Calif San Diego, Dept Mech & Aerosp Engn, 9500 Gilman Dr, La Jolla, CA 92093 USA. RI Daraio, Chiara/N-2170-2015 OI Daraio, Chiara/0000-0001-5296-4440 NR 20 TC 23 Z9 23 U1 2 U2 12 PU AMER SCIENTIFIC PUBLISHERS PI STEVENSON RANCH PA 25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USA SN 1533-4880 J9 J NANOSCI NANOTECHNO JI J. Nanosci. Nanotechnol. PD MAR PY 2006 VL 6 IS 3 BP 852 EP 856 DI 10.1166/jnn.2006.135 PG 5 WC Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 020VR UT WOS:000235941500042 PM 16573149 ER PT J AU Pena, LA Williams, DS Lin, X Rooney, WD Wang, R Gifford, AN AF Pena, LA Williams, DS Lin, X Rooney, WD Wang, R Gifford, AN TI Development of cytokine receptor pet-imaging probes in the EAE model of multiple sclerosis SO JOURNAL OF NEUROCHEMISTRY LA English DT Meeting Abstract CT Annual Meeting of the American-Society-for-Neurochemistry CY MAR 11-15, 2006 CL Portland, OR SP Amer Soc Neurochem C1 Brookhaven Natl Lab, Upton, NY 11973 USA. BioSET Inc, Rockville, MD USA. Oregon Hlth Sci Univ, Portland, OR 97201 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0022-3042 J9 J NEUROCHEM JI J. Neurochem. PD MAR PY 2006 VL 96 SU 1 BP 98 EP 98 PG 1 WC Biochemistry & Molecular Biology; Neurosciences SC Biochemistry & Molecular Biology; Neurosciences & Neurology GA 021KU UT WOS:000235982900245 ER PT J AU Marsh, BJ Rosenzweig, H Stevens, SL Hillary, B Gopalan, B Cannon, W Stenzel-Poore, MJ AF Marsh, BJ Rosenzweig, H Stevens, SL Hillary, B Gopalan, B Cannon, W Stenzel-Poore, MJ TI LPS induced ischemic preconditioning: a seminal role for NFKB in the establishment of tolerance to cerebral ischemic injury SO JOURNAL OF NEUROCHEMISTRY LA English DT Meeting Abstract CT Annual Meeting of the American-Society-for-Neurochemistry CY MAR 11-15, 2006 CL Portland, OR SP Amer Soc Neurochem C1 Oregon Hlth & Sci Univ, Dept Mol Microbiol & Immunol, Portland, OR USA. Pacific NW Natl Lab, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0022-3042 J9 J NEUROCHEM JI J. Neurochem. PD MAR PY 2006 VL 96 SU 1 BP 122 EP 122 PG 1 WC Biochemistry & Molecular Biology; Neurosciences SC Biochemistry & Molecular Biology; Neurosciences & Neurology GA 021KU UT WOS:000235982900314 ER PT J AU Wong, J Ferriera, JL Lindsey, EF Haupt, DL Hutcheon, ID Kinney, JH AF Wong, J Ferriera, JL Lindsey, EF Haupt, DL Hutcheon, ID Kinney, JH TI Morphology and microstructure in fused silica induced by high fluence ultraviolet 3 omega (355 nm) laser pulses SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article DE radiation effects; laser-matter interactions; secondary ion mass spectroscopy; defects; photoinduced effects; silica; water in glass ID DEFECT FORMATION; INDUCED DAMAGE; DENSIFICATION; IRRADIATION; MICROSCOPE; INTERFACE; DIOXIDE; GLASS AB The morphology and microstructure induced in high quality fused silica by UV (355 nm) laser pulses at high fluence (10(-45) j/cm(2)) have been investigated using a suite of microscopic and spectroscopic tools. The laser beam has a near-Gaussian profile with a 1/e(2) diameter of similar to 0.98 min at the sample plane and a pulse length FWHM (full width at half maximum) of 7.5 ns. The damage craters consist of a molten core region (thermal explosion), surrounded by a near concentric region of fractured material. The latter arises from propagation of lateral cracks induced by the laser-generated shock waves, which also compact the crater wall, similar to 10 mu m thick and similar to 20% higher in density. The size of the damage crater varies with laser fluence, number of pulses, and laser irradiation history. In the compaction layer, there is no detectable change in the Si/O stoichiometry to within 1.6% and no crystalline nano-particles of Si were observed. Micro(1-10 mu m) and nano-(20-200 nm) cracks are found, however. A lower valence Si(3+) species on the top 2-3 nm of the compaction layer is evident from the Si 2p XPS. The results are used to construct a physical model of the damage crater and to gain critical insight into laser damage process. (c) 2005 Elsevier B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Wong, J (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. EM wong10@llnl.gov NR 33 TC 71 Z9 78 U1 3 U2 15 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD MAR 1 PY 2006 VL 352 IS 3 BP 255 EP 272 DI 10.1016/j.jnoncrysol.2005.11.036 PG 18 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA 015XH UT WOS:000235584300008 ER PT J AU Byun, TS Hashimoto, N Farrell, K Lee, EH AF Byun, TS Hashimoto, N Farrell, K Lee, EH TI Characteristics of microscopic strain localization in irradiated 316 stainless steels and pure vanadium SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article ID STACKING-FAULT TETRAHEDRON; COPPER SINGLE CRYSTALS; DISK-BEND TEST; DEFORMATION MICROSTRUCTURES; PLASTIC INSTABILITY; NEUTRON-IRRADIATION; POLYCRYSTALLINE METALS; LOW-TEMPERATURE; MECHANISMS; STRESS AB Characteristics of localized dislocation glide were investigated for 316 and 316LN stainless steels and pure vanadium after ion or neutron irradiation near room temperature and deformation by a uniaxial tensile load or by a multiaxial bending load. In the irradiated 316 stainless steels, both the uniaxial tensile loading and the multiaxial bend loading produced straight localized bands in the form of channels and twins. In vanadium specimens, on the other hand, curved channels were observed after tensile deformation, and these became a common feature after multiaxial bend deformation. No twin was observed in vanadium. A river pattern of channels was observed in the bent samples after irradiation to a high dose of 0.69 dpa. A highly curved channel can be formed by successive cross slip of screw dislocations. Also, the channel width was not constant along the channels; channel widening occurred when weak defect clusters were removed by the gliding screw dislocations changing their paths by cross slip. It is believed that the dissociation of dislocations into partials and high angles between easy glide planes suppresses the formation of curved channels, while a multiaxial stress state, or a higher stress constraint, increases the tendency for channel bending and widening, (c) 2005 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Byun, TS (reprint author), Oak Ridge Natl Lab, POB 2008,MS 6151, Oak Ridge, TN 37831 USA. EM byunts@ornl.gov RI HASHIMOTO, Naoyuki/D-6366-2012 NR 57 TC 21 Z9 21 U1 1 U2 16 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 MAR 1 PY 2006 VL 349 IS 3 BP 251 EP 264 DI 10.1016/j.jnucmat.2005.10.011 PG 14 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 016NO UT WOS:000235627100002 ER PT J AU Caro, A Caro, M Lopasso, EM Turchi, PEA Farkas, D AF Caro, A Caro, M Lopasso, EM Turchi, PEA Farkas, D TI Thermodynamics of Fe-Cu alloys as described by a classic potential SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article ID MONTE-CARLO SIMULATIONS; PRESSURE-VESSEL STEELS; COMPUTER-SIMULATION; ALPHA-IRON; EVOLUTION AB The Fe-Cu system is of relevance to the nuclear industry because of the deleterious consequences of Cu precipitates in the mechanical properties of Fe. Several sets of classical potentials are used in molecular dynamics simulations studies of this system, in particular that proposed by Ludwig et A [M. Ludwig, D. Farkas, D. Pedraza, S. Schmauder, Model. Simul. Mater. Sci. Eng. 6 (1998) 19]. In this work we extract thermodynamic information from this interatomic potential. We obtain equilibrium phase diagram and find a reasonable agreement with the experimental phases in the regions of relevance to radiation damage studies. We compare the results with the predicted phase diagram based on other potential.. as calculated in previous work. We discuss the disagreements found between the phase diagram calculated here and experimental results, focusing on the pure components and discuss the applicability of these potentials. Improved potentials, primarily for the pure components, should be developed to account for proper phase stability in the solid phase up to melting. Finally we suggest an approach to improve existing potentials for this system. (c) 2005 Elsevier B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina. Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA. RP Caro, A (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. EM caro2@llnl.gov NR 33 TC 16 Z9 20 U1 0 U2 10 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 MAR 1 PY 2006 VL 349 IS 3 BP 317 EP 326 DI 10.1016/j.jnucmat.2005.11.004 PG 10 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 016NO UT WOS:000235627100007 ER PT J AU Glaser, ST Gatley, SJ Gifford, AN AF Glaser, ST Gatley, SJ Gifford, AN TI Ex vivo imaging of fatty acid amide hydrolase activity and its inhibition in the mouse brain SO JOURNAL OF PHARMACOLOGY AND EXPERIMENTAL THERAPEUTICS LA English DT Article ID CANNABINOID RECEPTOR AGONIST; IN-VIVO; ARACHIDONYLETHANOLAMIDE ANANDAMIDE; PHARMACOLOGICAL ACTIVITY; METABOLISM; PHOSPHOLIPIDS; ARACHIDONATE; MICE; INACTIVATION; DEGRADATION AB There is recent behavioral evidence that fatty acid amide hydrolase ( FAAH) inhibitors produce a subset of cannabinoid receptor agonist effects, suggesting both anandamide-specific behavioral functions and possible regional differences in FAAH inhibitory effects. Here, we introduce a novel imaging method to quantify regional differences in brain FAAH activity. Upon intravenous [H-3] anandamide administration, brain FAAH activity generates [ H-3] arachidonic acid, which is promptly trapped in membrane phospholipids. As a result, wild-type ( WT) brains accumulate tritium in a regionally specific manner that is dependent upon regional FAAH activity, whereas brains from FAAH knockout ( KO) mice show a uniform [ H-3] anandamide distribution. Increasing doses of anandamide +[ H-3] anandamide fail to alter regional tritium accumulation, suggesting insensitivity toward this process by anandamide-induced changes in regional cerebral blood flow. Regional tritiated metabolite levels in WT brains were highest in the somatosensory and visual cortices and the thalamus. Treatment with methylarachidonyl fluorophosphonate ( MAFP) ( 1 mg/kg i. p.) reduced regional tritium accumulation in the somatosensory and visual cortices ( p < 0.01), and at higher doses, the thalamus ( p < 0.05). The selective FAAH inhibitor 1-oxazolo[ 4,5-b] pyridin-2-yl-1-dodecanone ( CAY10435), although having similar efficacy as MAFP in reducing tritium in the thalamus and somatosensory and visual cortices, also reduces caudate putamen and cerebellum ( p < 0.01) activity. These data indicate FAAH activity generates heterogeneous regional accumulation of [ H-3] anandamide and metabolites, and they suggest the modulation of endocannabinoid tone by FAAH inhibitors depends upon not only the dose and compound used but also on the degree of FAAH expression in the brain regions examined. This imaging method determines regionally specific FAAH inhibition and can elucidate the in vivo effects of pharmacological agents targeting anandamide inactivation. C1 Brookhaven Natl Lab, Dept Med, Ctr Translat Neuroimaging, Upton, NY 11973 USA. Northeastern Univ, Ctr Drug Discovery, Boston, MA 02115 USA. RP Glaser, ST (reprint author), Brookhaven Natl Lab, Dept Med, Ctr Translat Neuroimaging, Bldg 490,30 Bell Ave, Upton, NY 11973 USA. EM sglaser@bnl.gov FU NIAAA NIH HHS [5R21AA014018]; NIDA NIH HHS [5T32DA007316] NR 38 TC 17 Z9 17 U1 2 U2 2 PU AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3995 USA SN 0022-3565 J9 J PHARMACOL EXP THER JI J. Pharmacol. Exp. Ther. PD MAR PY 2006 VL 316 IS 3 BP 1088 EP 1097 PG 10 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA 014JM UT WOS:000235476000015 PM 16278311 ER PT J AU Peacock, S Maltrud, M AF Peacock, S Maltrud, M TI Transit-time distributions in a global ocean model SO JOURNAL OF PHYSICAL OCEANOGRAPHY LA English DT Article ID CIRCULATION MODELS; ANTHROPOGENIC CO2; AGE; TRANSPORT; TRACERS; LAYER; WATER; PRECIPITATION; SIMULATIONS AB Results from a simulation of the ocean "transit-time distribution" ("TTD") for global and regional ocean surface boundary conditions are presented based on a 5000-yr integration using the Parallel Ocean Program ocean general circulation model. The TTD describes the probability that water at a given interior point in the ocean was at some point on the ocean surface a given amount of time ago. It is shown that the spatial distribution of ocean TTDs can be understood in terms of conventional wisdom regarding time scales and pathways of the ventilated thermocline and the thermohaline circulation-driven deep-ocean circulation. The true mean age from the model (the first moment of the TTD) is demonstrated to be very large everywhere, because of very long-tailed distributions. Regional TTD distributions are presented for distinct surface boundary subregions, and it is shown how these can help in the interpretation of the global TTD. The spatial structure of each regional TTD is shown to become essentially the same at relatively long times. The form of the TTD at a given point in the ocean can be very simple, but some regions do exhibit more complicated multimodal distributions. The degree to which a simple functional approximation to the TTD is able to predict the spatial and temporal evolution of selected idealized tracers (for which interior sources and sinks are known or zero) with knowledge of only the tracer surface boundary condition is explored. C1 Univ Chicago, Dept Geophys Sci, Chicago, IL 60637 USA. Los Alamos Natl Lab, Los Alamos, NM USA. RP Peacock, S (reprint author), Univ Chicago, Dept Geophys Sci, 5734 S Ellis Ave, Chicago, IL 60637 USA. EM synte@geosci.uchicago.edu NR 35 TC 38 Z9 38 U1 0 U2 4 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0022-3670 EI 1520-0485 J9 J PHYS OCEANOGR JI J. Phys. Oceanogr. PD MAR PY 2006 VL 36 IS 3 BP 474 EP 495 DI 10.1175/JPO2860.1 PG 22 WC Oceanography SC Oceanography GA 034DY UT WOS:000236908700013 ER PT J AU Gleeson, B AF Gleeson, B TI Thermal barrier coatings for aeroengine applications SO JOURNAL OF PROPULSION AND POWER LA English DT Article ID CHEMICAL-VAPOR-DEPOSITION; AL-BASED ALLOYS; OXIDATION BEHAVIOR; ALUMINIDE COATINGS; FAILURE MECHANISMS; SCALE ADHESION; GAS-TURBINES; BOND-COAT; INTERDIFFUSION BEHAVIOR; GROWN OXIDE AB Thermal barrier coatings (TBCs) have been in use in aeroturbine engine hot sections for over 20 years. The initial applications were driven by the need to suppress component degradation caused by excessive thermal gradients in vane airfoils. A TBC is essentially a layered, multimaterial structure that must withstand harsh temperature, environmental, thermal cycling, and stress conditions for an extended number of aircraft takeoffs and landings. A description of the TBC materials systems presently in use is presented, together with a summary of current understanding of materials and failure issues in TBCs. C1 Iowa State Univ, Ames, IA 50011 USA. US DOE, Ames Lab, Ames, IA 50011 USA. RP Gleeson, B (reprint author), Iowa State Univ, Ames, IA 50011 USA. NR 81 TC 137 Z9 145 U1 4 U2 70 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAR-APR PY 2006 VL 22 IS 2 BP 375 EP 383 DI 10.2514/1.20734 PG 9 WC Engineering, Aerospace SC Engineering GA 022WO UT WOS:000236087000010 ER PT J AU Lee, S Young, NL Whetstone, PA Cheal, SM Benner, WH Lebrilla, CB Meares, CF AF Lee, S Young, NL Whetstone, PA Cheal, SM Benner, WH Lebrilla, CB Meares, CF TI Method to site-specificafly identify and quantitate carbonyl end products of protein oxidation using oxidation-dependent element coded affinity tags (O-ECAT) and nanoliquid chromatography Fourier transform mass spectrometry SO JOURNAL OF PROTEOME RESEARCH LA English DT Article DE protein oxidation; mass tag; element-coded affinity tag (ECAT); nanoLC-FTICR-MS ID BIFUNCTIONAL CHELATING-AGENTS; AMINO-ACID-RESIDUES; RADIOLYTIC MODIFICATION; BINDING ANTIBODY; SERUM-ALBUMIN; PEPTIDES; DISEASE; YTTRIUM(III); COMPLEX; PROBES AB Protein oxidation is linked to cellular stress, aging, and disease. Protein oxidations that result in reactive species are of particular interest, since these reactive oxidation products may react with other proteins or biomolecules in an unmediated and irreversible fashion, providing a potential marker for a variety of disease mechanisms. We have developed a novel system to identify and quantitate, relative to other states, the sites of oxidation on a given protein. This presents a significant advancement over current methods, combining strengths of current methods and adding the abilities to multiplex, quantitate, and probe more modified amino acids. A specially designed Oxidation-dependent carbonyl-specific Element-Coded Affinity Mass Tag (O-ECAT), AOD, ((S)-2-(4-(2-aminooxy)-acetamido)-benzyl)-1,4,7,10-tetraazacyclododecane-N,N',",N'"-tetraacetic acid, is used to covalently tag the residues of a protein oxidized to alclehyde or keto end products. O-ECAT can be loaded with a variety of metals, which yields the ability to generate mass pairs and multiplex multiple samples. The O-ECAT moiety also serves as a handle. for identification, quantitation, and affinity purification. After proteolysis, the AOD-tagged peptides are affinity purified and analyzed by nanoLC-FTICR-MS (nanoliquid chromatography-Fourier transform ion cyclotron resonance-mass spectrometry), which provides high specificity in extracting coeluting AOD mass pairs with a unique mass difference and allows relative quantitation based on isotopic ratios. Using this methodology, we have quantified and mapped the surface oxidation sites on a model protein, recombinant human serum albumin (rHSA) in its native form (as purchased) and after FeEDTA oxidation both at the protein and amino acid levels. A variety of modified amino acid residues including lysine, arginine, proline, histidine, threonine, aspartic, and glutamic acids, were found to be oxidized to aldehyde and keto end products. The sensitivity of this methodology is shown by the number of peptides identified, twenty peptides on the native protein and twenty-nine after surface oxidation using FeEDTA and ascorbate. All identified peptides map to the surface of the HSA crystal structure, validating this method for identifying oxidized amino acids on protein surfaces. In relative quantitation experiments between FeEDTA oxidation and native protein oxidation, identified sites showed different relative propensities toward oxidation, independent of amino acid residue. This novel methodology not only has the ability to identify and quantitate oxidized proteins but also yields site-specific quantitation on a variety of individual amino acids. We expect to extend this methodology to study disease-related oxidation. C1 Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. Lawrence Livermore Natl Lab, NanoSci Lab, Livermore, CA USA. RP Lebrilla, CB (reprint author), Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. EM cblebrilla@ucdavis.edu; cfmeares@ucdavis.edu RI Meares, Claude/A-8345-2011 FU NIGMS NIH HHS [GM25909, GM049077] NR 28 TC 37 Z9 37 U1 1 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1535-3893 J9 J PROTEOME RES JI J. Proteome Res. PD MAR PY 2006 VL 5 IS 3 BP 539 EP 547 DI 10.1021/pr050299q PG 9 WC Biochemical Research Methods SC Biochemistry & Molecular Biology GA 020GP UT WOS:000235897000009 PM 16512668 ER PT J AU Dewberry, RA Salaymeh, SR Casella, VR Moore, FS AF Dewberry, RA Salaymeh, SR Casella, VR Moore, FS TI HEU measurements of holdup and recovered residue in the deactivation and decommission activities of the 321-M Reactor Fuel Fabrication Facility at the Savannah River Site SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article AB This paper contains a summary of the holdup and material control and accountability (MC&A) assays conducted for the determination of highly enriched uranium (HEU) in the deactivation and decommissioning (D&D) of the Reactor Fuel Fabrication Facility at the Savannah River Site (SRS). The facility was used to fabricate HEU fuel assemblies, lithium-aluminum target tubes, neptunium assemblies. and miscellaneous components for the SRS production reactors. The facility operated for more than 35 years. During this time thousands of uranium-aluminum alloy (U-Al) production reactor fuel tubes were produced. After the facility ceased operations in 1995, all of the easily accessible U-Al was removed from the building, and only residual amounts remained. The bulk of this residue was located in the equipment that generated and handled small U-Al particles and in the exhaust systems for this equipment (e.g., chip compactor, casting furnaces, log saw, lathes A & B, cyclone separator, Freon(TM) cart, riser crusher, ..., etc). The D&D project is likely to represent an important example for D&D activities across SRS and across the Department of Energy weapons complex. The Savannah River National Laboratory was tasked to conduct holdup assays to quantify the amount of HEU on all components removed from the facility prior to placing in solid waste containers. The U-235 holdup in any single component of process equipment must not exceed 50 g in order to meet the container limit. This limit was imposed to meet criticality requirements of the low level solid waste storage vaults. Thus, the holdup measurements were used as guidance to determine if further decontamination of equipment was needed to ensure that the quantity of U-235 did not exceed the 50 g limit and to ensure that the waste met the Waste Acceptance Criteria (WAC) of the solid waste storage vaults. Since HEU is an accountable nuclear material. the holdup assays and assays of recovered residue were also important for material control and accountability purposes. In summary, the results of the holdup assays were essential for determining compliance with the Waste Acceptance Criteria, Material Control & Accountability, and to ensure that administrative criticality safety controls were not exceeded. This paper discusses the gamma-ray assay measurements conducted and the modeling of the acquired data to obtain measured holdup in process equipment, exhaust components, and fixed geometry scrap cans. It also presents development work required to model new acquisition configurations and to adapt available instrumentation to perform the assays. C1 Westinghouse Savannah River Co, Savannah River Lab, Aiken, SC 29808 USA. RP Dewberry, RA (reprint author), Westinghouse Savannah River Co, Savannah River Lab, Aiken, SC 29808 USA. NR 42 TC 2 Z9 2 U1 0 U2 2 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD MAR PY 2006 VL 267 IS 3 BP 515 EP 531 DI 10.1007/s10967-006-0081-1 PG 17 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 029IJ UT WOS:000236555500002 ER PT J AU Luther, TA Herbst, RS Peterman, DR Tillotson, RD Garn, TG Babain, VA Smirnov, IV Stoyanov, ES Antonov, NG AF Luther, TA Herbst, RS Peterman, DR Tillotson, RD Garn, TG Babain, VA Smirnov, IV Stoyanov, ES Antonov, NG TI Some aspects of fundamental chemistry of the Universal Extraction (UNEX) process for the simultaneous separation of major radionuclides (cesium, strontium, actinides, and lanthanides) from radioactive wastes SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY LA English DT Article ID WATER-NITROBENZENE SYSTEM; POLYETHYLENE-GLYCOL; COBALT DICARBOLLIDE; NITRIC-ACID; SOLVENT; BARIUM AB Scientists at the Idaho National Laboratory (INL) and Khlopin Radium Institute (KRI) collaboratively developed and validated the concept of a Universal Extraction (UNEX) process for simultaneously removing the major radionuclides (Cs, Sr, actinides, and lanthanides) from acidic radioactive waste in a single solvent extraction process. The process chemistry is unique and complicated, since the extractants, chlorinated cobalt dicarbollide (CCD), polyethylene glycol (PEG), and diphenyl-N,N-di-n-butylcarbamoylmethylphosphine oxide (Ph2CMPO), operate synergistically to extract the major radionuclides. A combination of classical chemistry techniques, infrared (IR) spectroscopy, and nuclear magnetic resonance (NMR) spectroscopy were utilized to identify and explain the structures formed in the organic phase with protons or metal ions. Model systems, CCD-PEG and CCD-bidentate organophosphorus compounds were studied and possible structures of complexes, existing in the organic phase, are proposed and properties of the UNEX extractant are discussed. C1 Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. VG Khlopin Radium Inst, St Petersburg 197022, Russia. Novosibirsk Catalysis Inst, Novosibirsk 630090, Russia. St Petersburg State Univ, St Petersburg, Russia. RP Luther, TA (reprint author), Idaho Natl Engn Lab, POB 1625, Idaho Falls, ID 83415 USA. EM Thomas.Luther@inl.gov NR 29 TC 28 Z9 28 U1 0 U2 8 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0236-5731 J9 J RADIOANAL NUCL CH JI J. Radioanal. Nucl. Chem. PD MAR PY 2006 VL 267 IS 3 BP 603 EP 613 DI 10.1007/s10967-006-0114-9 PG 11 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 029IJ UT WOS:000236555500014 ER PT J AU Ingber, MS Mammoli, AA Vorobieff, P McCollam, T Graham, AL AF Ingber, MS Mammoli, AA Vorobieff, P McCollam, T Graham, AL TI Experimental and numerical analysis of irreversibilities among particles suspended in a Couette device SO JOURNAL OF RHEOLOGY LA English DT Article ID PRESSURE-DRIVEN FLOW; SIMPLE SHEAR-FLOW; CONCENTRATED SUSPENSIONS; SURFACE-ROUGHNESS; DILUTE SUSPENSION; VISCOUS FLUID; STOKES FLOWS; SPHERES; MIGRATION; SIMULATION AB An experimental and numerical study is performed of irreversibilities among particles in a wide-gap Couette device. Five spheres are placed in the Couette in a tightly packed arrangement. The inner cylinder is rotated five revolutions counterclockwise and subsequently five revolutions clockwise. Irreversibilities in the system are characterized by the radial spread of the particles measured by a radial moment. The experimental results are compared to a set of numerical simulations performed using a lubrication-corrected completed double layer boundary element method with a particle roughness model. In both the experiments and simulations, there is a critical value of the initial radial moment above which there is little irreversibility in the systems and below which irreversibilities accumulate rapidly. Particle roughness in the simulations can be used as a parameter to achieve the best agreement with experiment. It is noteworthy that the roughness value producing the best agreement is different than the actual average roughness of the particles used in the experiments. (c) 2006 The Society of Rheology. C1 Univ New Mexico, Dept Mech Engn, Albuquerque, NM 87131 USA. Rock Isl Arsenal, Armament Res, Ctr Dev & Engn, Rock Isl, IL 61299 USA. Los Alamos Natl Lab, Div Engn & Appl Sci, Los Alamos, NM 87545 USA. RP Ingber, MS (reprint author), Univ New Mexico, Dept Mech Engn, Albuquerque, NM 87131 USA. EM ingber@me.unm.edu RI Vorobieff, Peter/B-3376-2011; OI Vorobieff, Peter/0000-0003-0631-7263 NR 36 TC 11 Z9 11 U1 0 U2 4 PU JOURNAL RHEOLOGY AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0148-6055 J9 J RHEOL JI J. Rheol. PD MAR-APR PY 2006 VL 50 IS 2 BP 99 EP 114 DI 10.1122/1.2169806 PG 16 WC Mechanics SC Mechanics GA 021TD UT WOS:000236007700001 ER PT J AU Liu, SF Corbett, JD AF Liu, SF Corbett, JD TI Synthesis, structure, and properties of four ternary compounds: CaSrTt, Tt = Si, Ge, Sn, Pb SO JOURNAL OF SOLID STATE CHEMISTRY LA English DT Article DE tetrelide phase; crystal structure; synthesis; inverse PbCl2 structure type ID METALLIC ZINTL PHASE; CRYSTAL-STRUCTURE; CLUSTERS; CYCLOPENTADIENYL; STABILIZATION; EXAMPLES; LATTICE; SYSTEMS; BINARY; CO2SI AB The title compounds were synthesized and characterized by structural measurements and electronic structure calculations. Single-crystal X-ray diffraction analyses established that they all have the orthorhombic inverse-PbCl2-type structure (Pnma, Z = 4, a = 8.108(2), 8.124(2), 8.421(2), 8.509(2) angstrom; b = 4.944(1), 4.949(1), 5.168(1), 5.189(1) angstrom; c = 9.170(2), 9.184(2), 9.685(2), 9.740(2) angstrom, respectively). The tetrel (Tt) atoms are situated in tricapped trigonal prisms of ordered Sr and Ca atoms in which the smaller Ca atoms play a distinctive role. The structure is distinguishable from the Co2Si type by its more nearly ideal 6 + 3 (TCTP) environment about Tt rather than a higher coordination by cations. Other representations of the two structural types are also considered. Electronic band structure calculations suggest that the compounds are semiconductors, in agreement with literature data on their Ae(2)Tt analogues. (C) 2005 Elsevier Inc. All rights reserved. C1 Iowa State Univ, Dept Chem, Ames Lab, Ames, IA 50010 USA. RP Corbett, JD (reprint author), Iowa State Univ, Dept Chem, Ames Lab, Ames, IA 50010 USA. EM jcorbett@iastate.edu NR 33 TC 6 Z9 6 U1 0 U2 6 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 MAR PY 2006 VL 179 IS 3 BP 830 EP 835 DI 10.1016/j.jssc.2005.12.006 PG 6 WC Chemistry, Inorganic & Nuclear; Chemistry, Physical SC Chemistry GA 022WD UT WOS:000236085900026 ER PT J AU Kisa, M Li, L Yang, J Minton, TK Stratton, WG Voyles, P Chen, XD van Benthem, K Permycook, SJ AF Kisa, M Li, L Yang, J Minton, TK Stratton, WG Voyles, P Chen, XD van Benthem, K Permycook, SJ TI Homogeneous silica formed by the oxidation of Si(100) in hyperthermal atomic oxygen SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Article; Proceedings Paper CT 7th International Conference on Protection of Materials and Structures from Space Environment (ICPMSE-7) CY 2004 CL Toronto, CANADA ID SCANNING-TUNNELING-MICROSCOPY; MOLECULAR-BEAM EPITAXY; STRUCTURAL COMPARISONS; DISORDERED MATERIALS; SURFACES; HF; SI; PASSIVATION; OZONE; SPECTROSCOPY AB We review and summarize all of our microstructural comparisons of the silica and Si/SiOx interface created by the oxidation of Si(100) in atomic oxygen and molecular oxygen, using primarily electron microscopy techniques. A laser detonation source was used to produce atomic oxygen with kinetic energy 5.1 eV, whereas a conventional furnace was used to expose Si single crystal to thermal molecular oxygen. The silica formed on Si(100) by atomic oxygen is thicker, more homogeneous, and less amorphous (similar to alpha-quartz), as compared to the oxide layer created by molecular oxygen. High-angle annular dark field imaging and high-spatial-resolution electron energy loss spectroscopy confirmed that the Si/SiOx interface created by atomic oxygen is abrupt, containing no suboxides, as opposed to the broad interface with transitional states formed by molecular oxygen. Preliminary fluctuation electron microscopy results confirmed increased medium-range ordering in SiOx formed by atomic oxygen compared to the nonregular arrangement present in the amorphous oxide formed by the oxidation of Si(100) in molecular oxygen. Differences in the oxide films grown by exposure to atomic and molecular oxygen are discussed in the context of the thermionic emission model of silicon oxidation. C1 Univ Pittsburgh, Dept Mat Sci & Engn, Pittsburgh, PA 15261 USA. Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA. Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA. Cedarville Univ, Dept Sci & Math, Cedarville, OH 45314 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Kisa, M (reprint author), Univ Pittsburgh, Dept Mat Sci & Engn, Pittsburgh, PA 15261 USA. OI Voyles, Paul/0000-0001-9438-4284 NR 32 TC 4 Z9 5 U1 0 U2 5 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD MAR-APR PY 2006 VL 43 IS 2 BP 431 EP 435 DI 10.2514/1.17323 PG 5 WC Engineering, Aerospace SC Engineering GA 037AM UT WOS:000237119100023 ER PT J AU Leschziner, AE Nogales, E AF Leschziner, AE Nogales, E TI The orthogonal tilt reconstruction method: An approach to generating single-class volumes with no missing cone for ab initio reconstruction of asymmetric particles SO JOURNAL OF STRUCTURAL BIOLOGY LA English DT Article DE electron microscopy; single-particle reconstruction; random conical tilt; heterogeneity; initial model ID ESCHERICHIA-COLI RIBOSOME; 3-DIMENSIONAL RECONSTRUCTION; CRYOELECTRON MICROSCOPY; ELECTRON TOMOGRAPHY; CONVEX PROJECTIONS; ICE; MACROMOLECULES; RESOLUTION; VIEWS AB Generating reliable initial models is a critical step in the reconstruction of asymmetric single-particles by 3D electron microscopy. This is particularly difficult to do if heterogeneity is present in the sample. The Random Conical Tilt (RCT) method, arguably the most robust presently to accomplish this task, requires significant user intervention to solve the "missing cone" problem. We present here a novel approach, termed the orthogonal tilt reconstruction method, that eliminates the missing cone altogether, making it possible for single-class volumes to be used directly as initial references in refinement without further processing. The method involves collecting data at +45 degrees and -45 degrees tilts and only requires that particles adopt a relatively large number of orientations on the grid. One tilted data set is used for alignment and classification and the other set-which provides views orthogonal to those in the first-is used for reconstruction, resulting in the absence of a missing cone. We have tested this method with synthetic data and compared its performance to that of the RCT method. We also propose a way of increasing the level of homogeneity in individual 2D classes (and volumes) in a heterogeneous data set and identifying the most homogeneous volumes. (C) 2005 Elsevier Inc. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA. Howard Hughes Med Inst, Coconut Grove, FL 33133 USA. RP Leschziner, AE (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM AELeschziner@lbl.gov NR 24 TC 61 Z9 62 U1 0 U2 3 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 1047-8477 J9 J STRUCT BIOL JI J. Struct. Biol. PD MAR PY 2006 VL 153 IS 3 BP 284 EP 299 DI 10.1016/j.jsb.2005.10.012 PG 16 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA 020XD UT WOS:000235945600008 PM 16431136 ER PT J AU Friedrich, S AF Friedrich, S TI Cryogenic X-ray detectors for synchrotron science SO JOURNAL OF SYNCHROTRON RADIATION LA English DT Article DE superconducting X-ray detectors; microcalorimeters; superconducting tunnel junctions; fluorescence-detected X-ray absorption spectroscopy ID SUPERCONDUCTING TUNNEL-JUNCTIONS; METALLIC MAGNETIC CALORIMETERS; ENERGY RESOLUTION; IMAGING SPECTROMETERS; PARTICLE-DETECTION; SPECTROSCOPY; MICROCALORIMETER; RADIATION; FLUORESCENCE; SENSITIVITY AB Cryogenic detectors operated at temperatures below 1 K offer an order of magnitude higher energy resolution than conventional semiconductor-based energy-dispersive detectors, and orders of magnitude higher efficiency that grating spectrometers. Initially developed for astrophysics applications, these detectors are increasingly used in synchrotron-based research, both for detector characterization and for high-resolution X-ray spectroscopy. This article reviews current cryogenic detector technologies and their performance with respect to their use in synchrotron science. It also discusses areas of research that can benefit from improved energy resolution detectors, and outlines desirable detector developments in the context of novel science they would enable. C1 Lawrence Livermore Natl Lab, Adv Detector Grp, Livermore, CA 94550 USA. Lawrence Berkeley Natl Lab, Adv Biol & Environm Xray Facil, Berkeley, CA 94720 USA. RP Friedrich, S (reprint author), Lawrence Livermore Natl Lab, Adv Detector Grp, 7000 E Ave,L-270, Livermore, CA 94550 USA. EM friedrich1@llnl.gov NR 63 TC 26 Z9 26 U1 1 U2 6 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0909-0495 J9 J SYNCHROTRON RADIAT JI J. Synchrot. Radiat. PD MAR PY 2006 VL 13 BP 159 EP 171 DI 10.1107/S090904950504197X PN 2 PG 13 WC Instruments & Instrumentation; Optics; Physics, Applied SC Instruments & Instrumentation; Optics; Physics GA 013BH UT WOS:000235384100008 PM 16495616 ER PT J AU Smith, GC AF Smith, GC TI Gas-based detectors for synchrotron radiation SO JOURNAL OF SYNCHROTRON RADIATION LA English DT Article DE X-ray detectors; proportional chamber; position sensing; position resolution ID X-RAY-DETECTOR; HIGH-RESOLUTION; PROPORTIONAL DETECTORS; FILLED DETECTORS; AREA-DETECTOR; MACROMOLECULAR CRYSTALLOGRAPHY; PROTEIN CRYSTALLOGRAPHY; POSITION DETECTION; DIGITAL CONVERTER; IMAGING DETECTOR AB Gas-filled detectors have played an important role in experiments at synchrotron sources for many years. Although other X-ray detection technologies are gaining wider use, particularly with the higher flux of new sources, gas-filled detectors are still well suited for specific experiments. This article describes some fundamental characteristics of gas-filled detectors for X-ray detection, with emphasis on position encoding, position resolution and linearity. Recently developed micropattern structures for achieving electron multiplication are described. Some applications of conventional wire chambers and micro-pattern detectors are given. C1 Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA. RP Smith, GC (reprint author), Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA. EM gsmith@bnl.gov NR 50 TC 6 Z9 6 U1 0 U2 4 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0909-0495 J9 J SYNCHROTRON RADIAT JI J. Synchrot. Radiat. PD MAR PY 2006 VL 13 BP 172 EP 179 DI 10.1107/S0909049505033923 PN 2 PG 8 WC Instruments & Instrumentation; Optics; Physics, Applied SC Instruments & Instrumentation; Optics; Physics GA 013BH UT WOS:000235384100009 PM 16495617 ER PT J AU Toellner, TS Alatas, A Said, A Shu, D Sturhahn, W Zhao, J AF Toellner, TS Alatas, A Said, A Shu, D Sturhahn, W Zhao, J TI A cryogenically stabilized meV-monochromator for hard X-rays SO JOURNAL OF SYNCHROTRON RADIATION LA English DT Article DE high resolution; monochromator; X-rays; cryostat; Sn ID SYNCHROTRON-RADIATION; ENERGY RESOLUTION; SCATTERING; COLLIMATOR; WATER AB The design and performance results for a cryogenically stabilized high-resolution monochromator for 23.880 keV ( lambda = 52 pm) X-rays are presented. The four-crystal-reflection monochromator is suitable for nuclear resonant scattering measurements from 119 Sn compounds using synchrotron radiation. The design includes a low-vibration cryostat that maintains two of the four crystal reflections at a temperature where the coefficient for thermal expansion of the crystalline material ( silicon) vanishes. Test results demonstrate a 1.3 meV bandwidth with negligible broadening due to vibrations and a spectral efficiency of 37% when used with an undulator source. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Toellner, TS (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. EM toellner@anl.gov NR 14 TC 26 Z9 26 U1 2 U2 6 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0909-0495 J9 J SYNCHROTRON RADIAT JI J. Synchrot. Radiat. PD MAR PY 2006 VL 13 BP 211 EP 215 DI 10.1107/S0909049505042664 PN 2 PG 5 WC Instruments & Instrumentation; Optics; Physics, Applied SC Instruments & Instrumentation; Optics; Physics GA 013BH UT WOS:000235384100013 PM 16495621 ER PT J AU Ulrich, TJ Johnson, PA Sutin, A AF Ulrich, TJ Johnson, PA Sutin, A TI Imaging nonlinear scatterers applying the time reversal mirror SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID ACOUSTIC HARMONIC-GENERATION; WAVE SPECTROSCOPY NEWS; SOLIDS; CRACKS; DAMAGE AB Nonlinear elastic wave spectroscopy (NEWS) has been shown to exhibit a high degree of sensitivity to both distributed and isolated nonlinear scatterers in solids. In the case of an isolated nonlinear scatterer such as a crack, by combining the elastic energy localization of the time reversal mirror with NEWS, it is shown here that one can isolate surfacial nonlinear scatterers in solids. The experiments presented here are conducted in a doped glass block applying two different fixed frequency time-reversed signals at each focal point and scanning over a localized nonlinear scatterer (a complex crack). The results show a distinct increase in nonlinear response, via intermodulation distortion, over the damaged area. The techniques described herein provide the means to discriminate between linear and nonlinear scatterers, and thus to ultimately image and characterize damaged regions. (c) 2006 Acoustical Society of America. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Stevens Inst Technol, Artann Labs, Hoboken, NJ 07030 USA. RP Ulrich, TJ (reprint author), Los Alamos Natl Lab, EES-11, Los Alamos, NM 87545 USA. EM tju@lanl.gov; paj@lanl.gov; asutin@stevens-tech.edu OI Johnson, Paul/0000-0002-0927-4003 NR 19 TC 53 Z9 55 U1 0 U2 7 PU ACOUSTICAL SOC AMER AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD MAR PY 2006 VL 119 IS 3 BP 1514 EP 1518 DI 10.1121/1.2168413 PG 5 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA 023VU UT WOS:000236155100023 ER PT J AU Lawson, DR Gardetto, E AF Lawson, DR Gardetto, E TI Untitled SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION LA English DT Letter C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Sierra Res, Ann Arbor, MI USA. RP Lawson, DR (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU AIR & WASTE MANAGEMENT ASSOC PI PITTSBURGH PA ONE GATEWAY CENTER, THIRD FL, PITTSBURGH, PA 15222 USA SN 1047-3289 J9 J AIR WASTE MANAGE JI J. Air Waste Manage. Assoc. PD MAR PY 2006 VL 56 IS 3 BP 242 EP 243 PG 2 WC Engineering, Environmental; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 021KZ UT WOS:000235983400002 ER PT J AU Brochu, M Gauntt, BD Shah, R Loehman, RE AF Brochu, M Gauntt, BD Shah, R Loehman, RE TI Comparison between micrometer- and nano-scale glass composites for sealing solid oxide fuel cells SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID BEHAVIOR; PHASE; MG AB The present study compares the feasibility of controlling the properties of a glass composite seal by adding nano- or micronscale yttria-stabilized zirconia (YSZ) powders to a borate glass used for sealing electrolyte-supported solid oxide fuel cells (SOFCs). The crystallization of the glass composites was found to be independent of the volume fraction of added YSZ, for both sizes of the additive. The variation of the flow properties of both composite seals was measured using a wettability test, and an increase of the contact angle was observed when the volume fraction of additives was increased. The major factor found to decrease spreading of the glass composite was the additive particle size, where shape retention was observed for the nanometer (nm)-YSZ composites while spreading of the micrometer (pm)YSZ composites was observed under the same testing conditions. Examination of the microstructure showed that initially the Ba-containing glass reacted with YSZ to form a BaZrO3 compound. Long-time exposure at 800 degrees C caused a large reduction in the coefficient of thermal expansion (CTE), which can be explained by increased formation of BaZrO3 and further change in glass composition. This change in CTE occurs rapidly for the nm-YSZ composites, which is not observed for the mu m-YSZ composites. However, the adverse reactions occurring between the additives and the glass matrix were found to reduce the CTE of the glass composites to a value lower than the recommended limit for a system used for sealing SOFCs. C1 Sandia Natl Labs, Adv Mat Labs, Albuquerque, NM 87106 USA. RP Loehman, RE (reprint author), Sandia Natl Labs, Adv Mat Labs, Albuquerque, NM 87106 USA. EM loehman@sandia.gov NR 22 TC 27 Z9 27 U1 0 U2 4 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAR PY 2006 VL 89 IS 3 BP 810 EP 816 DI 10.1111/j.1551-2916.2005.00804.x PG 7 WC Materials Science, Ceramics SC Materials Science GA 030AY UT WOS:000236606700006 ER PT J AU Xu, Y Goyal, A Leonard, KJ Specht, ED Shi, D Paranthaman, M AF Xu, Y Goyal, A Leonard, KJ Specht, ED Shi, D Paranthaman, M TI Processing dependence of texture, and critical properties of YBa2Cu3O7-delta films on RABiTS substrates by a non-fluorine MOD method SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID CRITICAL-CURRENT-DENSITY; HIGH-TC SUPERCONDUCTORS; PERFORMANCE YBCO FILMS; THIN-FILMS; TRIFLUOROACETATE PRECURSORS; METALORGANIC DEPOSITION; BA2YCU3O7-X; GROWTH; FABRICATION; CONDUCTORS AB YBa2Cu3O7-delta (YBCO or Y123) films on rolling-assisted biaxially textured substrates (RABiTS) were prepared via a fluorine-free metallorganic deposition (MOD) through spin coating, burnout, and high temperature anneal. The effects of substrate texture and surface energy of the CeO2 cap layer were investigated. Except for the commonly accepted key factors, such as the textures of substrate and buffer layers, we found some other factors, for example, the deposition temperature of the cap layer, are also critical to the epitaxial growth of Y123 phase. With the CeO2 cap layer deposited at relative high temperature of 700 degrees C, a critical current density, J(c), over 1 MA/cm(2) has been demonstrated for the first time on Ni-RABiTS by a fluorine-free MOD method. Whereas for samples with CeO2 cap layers deposited at a lower temperature of 600 degrees C, even though XRD data showed a better texture on these buffer layers, texture degradations of YBCO grains under the optimized processing conditions were observed and a lower oxygen partial pressure around 40 ppm was necessary for the epitaxial growth of Y123 phase. As a result, J(c) fell to 0.45 MA/cm(2) at 77 K. The observed phenomena points to the change of surface energy and reactivity of the CeO2 cap layer with respect to the CeO2 deposition temperature. In this paper, the YBCO phase diagram was also summarized. C1 Univ Cincinnati, Dept Mat Sci, Cincinnati, OH 45221 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Xu, Y (reprint author), Univ Cincinnati, Dept Mat Sci, Cincinnati, OH 45221 USA. EM yxu@ues.com RI Specht, Eliot/A-5654-2009; Paranthaman, Mariappan/N-3866-2015 OI Specht, Eliot/0000-0002-3191-2163; Paranthaman, Mariappan/0000-0003-3009-8531 NR 39 TC 8 Z9 10 U1 2 U2 7 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAR PY 2006 VL 89 IS 3 BP 914 EP 920 DI 10.1111/j.1551-2916.2005.00821.x PG 7 WC Materials Science, Ceramics SC Materials Science GA 030AY UT WOS:000236606700022 ER PT J AU Weyant, CM Faber, KT Almer, JD Guiheen, JV AF Weyant, CM Faber, KT Almer, JD Guiheen, JV TI Residual stress and microstructural evolution in environmental barrier coatings of tantalum oxide alloyed with aluminum oxide and lanthanum oxide SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID SIO2 SCALE VOLATILITY; SILICON-CARBIDE; COMBUSTION CONDITIONS; MULLITE COATINGS; SIC CERAMICS; TEMPERATURE; RECESSION; OXIDATION; DELAMINATION; MECHANICS AB Pure Ta2O5 has been investigated as a possible environmental barrier coating (EBC) material for silicon nitride-based ceramics, but was found to be inadequate because of localized buckling and the formation of microcracks. To address these issues, alloying additions were explored to improve some of the properties of Ta2O5 for this application. Aluminum oxide (Al2O3) was investigated to stabilize the low-temperature beta-Ta2O5 phase and reduce grain growth in the coating through the formation of a solid solution. Lanthanum oxide (La2O3) was investigated as a second phase former designed to pin grain-boundaries and reduce grain growth. High-brilliance X-rays at the Advanced Photon Source at Argonne National Laboratory were used to evaluate residual stress and phase evolution in the alloyed coatings. Scanning electron microscopy was used to study microstructural changes and grain growth. Al2O3 was successful at stabilizing beta-Ta2O5 and the Al2O3 and La2O3 significantly reduced grain growth in the coatings. Significant microcracking was observed in the coatings alloyed with Al2O3 after thermal cycling in air. Coatings alloyed with Al2O3 and La2O3 showed no evidence of microcracking. However, some of the alloyed coatings which were first thermally cycled in air and subsequently, exposed to high-temperature steam completely delaminated from the AS800 silicon nitride substrates, a highly undesirable result for an EBC. C1 Northwestern Univ, Dept Mat Sci & Engn, Robert R McCormick Sch Engn & Appl Sci, Evanston, IL 60208 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Honeywell Int, Morristown, NJ 07962 USA. RP Faber, KT (reprint author), Northwestern Univ, Dept Mat Sci & Engn, Robert R McCormick Sch Engn & Appl Sci, Evanston, IL 60208 USA. EM k-faber@northwestern.edu RI Faber, Katherine/B-6741-2009 NR 38 TC 10 Z9 10 U1 2 U2 24 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAR PY 2006 VL 89 IS 3 BP 971 EP 978 DI 10.1111/j.1551-2916.2005.00830.x PG 8 WC Materials Science, Ceramics SC Materials Science GA 030AY UT WOS:000236606700032 ER PT J AU Haslam, JJ Lange, FF AF Haslam, JJ Lange, FF TI Effects of heat treatments in HCl on the fiber bundle strength of a two-phase polycrystalline oxide fiber SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID BRITTLE-MATRIX COMPOSITES; CERAMIC COMPOSITE AB The effects of heat treatments in air and in an HCl gas atmosphere on the strength of Nextel 720 fibers were investigated. These fibers were polycrystalline oxide fibers containing two phases: mullite and alumina. The fibers were heat treated in air and in HCl at 1200 degrees and 1300 degrees C for I h to simulate possible processing conditions for all-oxide ceramic fiber composites. These fibers were tested as bundles containing approximately 400 fibers, as supplied by the manufacturer. Tests with fibers in the as-received condition were also conducted for comparison. The as-received fibers had a bundle strength of approximately I GPa. Most of the fiber heat treatments appear to cause modest reductions in the average strength, although there was scatter in the results. Fibers heat treated in HCl at 1300 degrees C did not appear to show a statistically significant reduction in strength, and suggest the suitability of this process for strengthening an all-oxide ceramic fiber composite. Examination of the fracture surfaces indicated that weld lines (at locations where the fibers were touching when the fibers were made) were the source of the critical flaws that caused fiber fracture. The possible effects of the heat treatments on the weld lines and the bundle strengths were discussed. C1 Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA. RP Haslam, JJ (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM haslam2@llnl.gov NR 20 TC 3 Z9 3 U1 1 U2 6 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAR PY 2006 VL 89 IS 3 BP 985 EP 989 DI 10.1111/j.1551-2916.2005.00851.x PG 5 WC Materials Science, Ceramics SC Materials Science GA 030AY UT WOS:000236606700034 ER PT J AU Zhang, F Chen, CH Hanson, JC Robinson, RD Herman, IP Chan, SW AF Zhang, F Chen, CH Hanson, JC Robinson, RD Herman, IP Chan, SW TI Phases in ceria-zirconia binary oxide (1-x)CeO2-xZrO(2) nanoparticles: The effect of particle size SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article; Proceedings Paper CT 106th Annual Meeting of the American-Ceramic-Society CY APR 18-21, 2004 CL Indianapolis, IN SP Amer Ceram Soc ID OXYGEN STORAGE CAPACITY; X-RAY-DIFFRACTION; RAMAN-SPECTROSCOPY; TETRAGONAL PHASE; CEO2; CATALYSTS; TEMPERATURE; SCATTERING; BEHAVIOR; ZRO2 AB The phases of ceria-zirconia nanoparticles observed in air are studied as a function of particle size and composition by X-ray diffraction, transmission electron microscopy, and Raman spectroscopy. The emergence of two tetragonal phases t" and t monotonically moves toward higher zirconia concentrations with decreasing particle size. A smaller particle size increases the solubility of zirconia in cubic ceria, while higher zirconia content in ceria stabilizes against coarsening. In particular, the cubic Ce1-xZrxO2-y is persistent and is 8% in phase amount even at 90% zirconia with 33 nm crystal size. Neither the monoclinic phase in nor the tetragonal phase is observed in the present nanoparticles (< 40 nm). The effectiveness of these nanoparticles as oxygen source-and-sink in catalytic support is largely due to the persistence of the cubic and the t" phases. C1 Columbia Univ, Dept Appl Phys & Appl Math, Mat Res Sci & Engn Ctr, New York, NY 10027 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Chan, SW (reprint author), Columbia Univ, Dept Appl Phys & Appl Math, Mat Res Sci & Engn Ctr, New York, NY 10027 USA. EM sc174@columbia.edu RI Hanson, jonathan/E-3517-2010 NR 31 TC 74 Z9 75 U1 2 U2 25 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD MAR PY 2006 VL 89 IS 3 BP 1028 EP 1036 DI 10.1111/j.1551-2916.2005.00788.x PG 9 WC Materials Science, Ceramics SC Materials Science GA 030AY UT WOS:000236606700040 ER PT J AU Denney, MC Smythe, NA Cetto, KL Kemp, RA Goldberg, KI AF Denney, MC Smythe, NA Cetto, KL Kemp, RA Goldberg, KI TI Insertion of molecular oxygen into a palladium(II) hydride bond SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID COORDINATED PALLADIUM(0); AEROBIC OXIDATION; DIOXYGEN; COMPLEXES; HYDROPEROXO; CATALYSIS; PLATINUM; ALKENES; KETONES; RHODIUM C1 Univ Washington, Dept Chem, Seattle, WA 98195 USA. Univ New Mexico, Dept Chem, Albuquerque, NM 87131 USA. Sandia Natl Labs, Adv Mat Lab, Albuquerque, NM 87106 USA. RP Kemp, RA (reprint author), Univ Washington, Dept Chem, Box 351700, Seattle, WA 98195 USA. EM goldberg@chem.washington.edu NR 26 TC 125 Z9 125 U1 2 U2 27 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAR 1 PY 2006 VL 128 IS 8 BP 2508 EP 2509 DI 10.1021/ja0562292 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 018TH UT WOS:000235787200003 PM 16492014 ER PT J AU Mirica, LM Rudd, DJ Vance, MA Solomon, EI Hodgson, KO Hedman, B Stack, TDP AF Mirica, LM Rudd, DJ Vance, MA Solomon, EI Hodgson, KO Hedman, B Stack, TDP TI mu-eta(2):eta(2)-Peroxodicopper(II) complex with a secondary diamine ligand: A functional model of tyrosinase SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID SIDE-ON PEROXO; COPPER-DIOXYGEN COMPLEXES; ACTIVE-SITES; PEROXODICOPPER(II) COMPLEX; ELECTRONIC-STRUCTURE; REACTIVITY; BINDING; MECHANISM; OXYHEMOCYANIN; OXYGENATION AB The activation of dioxygen (O-2) by Cu(I) complexes is an important process in biological systems and industrial applications. In tyrosinase, a binuclear copper enzyme, a mu-eta(2):eta(2)-peroxodicopper(II) species is accepted generally to be the active oxidant. Reported here is the characterization and reactivity of a mu-eta(2):eta(2)-peroxodicopper(II) complex synthesized by reacting the Cu(I) complex of the secondary diamine ligand N,N'-di-tert-butyl-ethylenediamine (DBED), [(DBED)Cu(MeCN)](X) (1 center dot X, X = CF3SO3, CH3SO3-, SbF6-, BF4-), with O-2 at 193 K to give [{Cu(DBED)}(2)(O-2)](X)(2) (2 center dot X-2). The UV-vis and resonance Raman spectroscopic features of 2 vary with the counteranion employed yet are invariant with change of solvent. These results implicate an intimate interaction of the counteranions with the Cu2O2 core. Such interactions are supported further by extended X-ray absorption fine structure (EXAFS) analyses of solutions that reveal weak copper-counteranion interactions. The accessibility of the Cu2O2 core to exogenous ligands such as these counteranions is manifest further in the reactivity of 2 with externally added substrates. Most notable is the hydroxylation reactivity with phenolates to give catechol and quinone products. Thus the strategy of using simple bidentate ligands at low temperatures provides not only spectroscopic models of tyrosinase but also functional models. C1 Stanford Univ, Dept Chem, Stanford, CA 94305 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, SLAC, Stanford, CA 94309 USA. RP Solomon, EI (reprint author), Stanford Univ, Dept Chem, Stanford, CA 94305 USA. EM stack@stanford.edu FU NCRR NIH HHS [RR01209]; NIDDK NIH HHS [DK31450]; NIGMS NIH HHS [GM50730] NR 56 TC 53 Z9 54 U1 0 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAR 1 PY 2006 VL 128 IS 8 BP 2654 EP 2665 DI 10.1021/ja056740v PG 12 WC Chemistry, Multidisciplinary SC Chemistry GA 018TH UT WOS:000235787200041 PM 16492052 ER PT J AU Gaucher, SP Hadi, MZ Young, MM AF Gaucher, SP Hadi, MZ Young, MM TI Influence of crosslinker identity and position on gas-phase dissociation of Lys-Lys crosslinked peptides SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY LA English DT Article ID TANDEM MASS-SPECTROMETRY; MULTI-PROTEIN COMPLEXES; LOW-ENERGY; LINKING; IDENTIFICATION; CLEAVAGE; RESOLUTION; RESIDUES; SPECTRA; HISTIDINE AB A systematic study of the dissociation patterns of crosslinked peptides analyzed by tandem mass spectrometry is reported. A series of 11-mer peptides was designed around either a polyalanine or polyglycine scaffold with arginine at the C terminus. One or two lysine residues were included at various locations within the peptides to effect inter- or intra-molecular crosslinking, respectively. Crosslinked species were generated with four commonly used amine-specific chemical crosslinking reagents: disuccinimidyl suberate (DSS), disuccinimidyl tartarate (DST), dithiobis(succinimidylpropionate) (DSP), and disuccinimidyl glutarate (DSG). The influence of precursor charge state, location of crosslink, and specific crosslinking reagent on the MS/MS dissociation pattern was examined. Observed trends in the dissociation patterns obtained for these species will allow for improvements to software used in the automated interpretation of crosslinked peptide MS/MS data. C1 Sandia Natl Labs, Livermore, CA 94551 USA. RP Gaucher, SP (reprint author), Sandia Natl Labs, POB 969,MS 9291, Livermore, CA 94551 USA. EM spgauch@sandia.gov NR 44 TC 21 Z9 22 U1 2 U2 10 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 1044-0305 J9 J AM SOC MASS SPECTR JI J. Am. Soc. Mass Spectrom. PD MAR PY 2006 VL 17 IS 3 BP 395 EP 405 DI 10.1016/j.jasms.2005.11.023 PG 11 WC Biochemical Research Methods; Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Biochemistry & Molecular Biology; Chemistry; Spectroscopy GA 021SE UT WOS:000236004700012 PM 16443364 ER PT J AU Austin, DE Cruz, D Blain, MG AF Austin, DE Cruz, D Blain, MG TI Simulations of ion trapping in a micrometer-sized cylindrical ion trap SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY LA English DT Article ID FLIGHT MASS-SPECTROMETER; ELECTRON-IMPACT IONIZATION; HIGH-RESOLUTION; MINIATURE; TRAJECTORIES; ARRAY; DYNAMICS; COMPACT AB We have performed detailed SIMION simulations of ion behavior in micrometer-sized cylindrical ion traps (r(0) = 1 mu m). Simulations examined the effects of ion and neutral temperature, the pressure and nature of cooling gas, ion mass, trap voltage and frequency, space-charge, fabrication defects, and other parameters on the ability of micrometer-sized traps to store ions. At this size scale voltage and power limitations constrain trap operation to frequencies about 1 GHz and rf amplitudes of tens of volts. Correspondingly, the pseudopotential well depth of traps is shallow, and thermal energies contribute significantly to ion losses. Trapping efficiency falls off gradually as q(z) approaches 0.908, possibly complicating mass-selective trapping, ejection, or quantitation. Coulombic repulsion caused by multiple ions in a small-volume results in a trapping limit of a single ion per trap. If multiple ions are produced in a trap, all but one ion are ejected within a few microseconds. The remaining ion tends to have favorable trapping parameters and a lifetime about hundreds of microseconds; however, this lifetime is significantly shorter than it would have been in the absence of space-charge. Typical microfabrication defects affect ion trapping only minimally. We recently reported (IJMS 2004, 236, 91-104) on the construction of a massively parallel array of ion traps with dimensions of r(0) = 1 mu m. The relationship of the simulations to the expected performance of the microfabricated array is discussed. C1 Brigham Young Univ, Dept Chem & Biochem, Provo, UT 84602 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Brigham Young Univ, Dept Chem & Biochem, Provo, UT 84602 USA. EM austin@chem.byu.edu NR 43 TC 18 Z9 18 U1 3 U2 19 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1044-0305 EI 1879-1123 J9 J AM SOC MASS SPECTR JI J. Am. Soc. Mass Spectrom. PD MAR PY 2006 VL 17 IS 3 BP 430 EP 441 DI 10.1016/j.jasms.2005.11.020 PG 12 WC Biochemical Research Methods; Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Biochemistry & Molecular Biology; Chemistry; Spectroscopy GA 021SE UT WOS:000236004700016 PM 16442302 ER PT J AU Liu, YG Daum, PH McGraw, R Wood, R AF Liu, YG Daum, PH McGraw, R Wood, R TI Parameterization of the autoconversion process. Part II: Generalization of sundqvist-type parameterizations SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID KESSLER-TYPE PARAMETERIZATIONS; ANALYTICAL FORMULATION; MARINE STRATOCUMULUS; CLIMATE MODELS; LAYER CLOUDS; PHYSICS; DRIZZLE AB Existing Sundqvist-type parameterizations, which only consider dependence of the autoconversion rate on cloud liquid water content, are generalized to explicitly account for the droplet concentration and relative dispersion of the cloud droplet size distribution as well. The generalized Sundqvist-type parameterization includes the more commonly used Kessler-type parameterization as a special case, unifying the two different types of parameterizations for the autoconversion rate. The generalized Sundqvist-type parameterization is identical with the Kessler-type parameterization presented in Part I beyond the autoconversion threshold, but exhibits a more realistic, smooth transition in the vicinity of the autoconversion threshold (threshold behavior) in contrast to the discontinuously abrupt transition embodied in the Kessler-type parameterization. A new Sundqvist-type parameterization is further derived by applying the expression for the critical radius derived from the kinetic potential theory to the generalized Sundqvist-type parameterization. The new parameterization eliminates the need for defining the driving radius and for prescribing the critical radius associated with Kessler-type parameterizations. The two-part structure of the autoconversion process raises questions regarding model-based empirical parameterizations obtained by fitting simulation results from detailed collection models with a single function. C1 Brookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USA. Univ Washington, Seattle, WA 98195 USA. RP Liu, YG (reprint author), Brookhaven Natl Lab, Div Atmospher Sci, Bldg 815E,75 Rutherford Dr, Upton, NY 11973 USA. EM lyg@bnl.gov RI Liu, Yangang/H-6154-2011; Wood, Robert/A-2989-2008 OI Wood, Robert/0000-0002-1401-3828 NR 22 TC 19 Z9 20 U1 1 U2 6 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0022-4928 J9 J ATMOS SCI JI J. Atmos. Sci. PD MAR PY 2006 VL 63 IS 3 BP 1103 EP 1109 DI 10.1175/JAS3675.1 PG 7 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 031WM UT WOS:000236735900020 ER PT J AU Barnard, PL Owen, LA Finkel, RC AF Barnard, PL Owen, LA Finkel, RC TI Quaternary fans and terraces in the Khumbu Himal south of Mount Everest: their characteristics, age and formation SO JOURNAL OF THE GEOLOGICAL SOCIETY LA English DT Article ID CENTRAL BRITISH-COLUMBIA; CENTRAL NEPAL HIMALAYA; LANDSCAPE EVOLUTION; GARHWAL HIMALAYA; NORTHERN INDIA; PARAGLACIAL SEDIMENTATION; PRODUCTION-RATES; LAHUL-HIMALAYA; FLOW DEPOSITS; ALLUVIAL FANS AB Large fans and terraces are frequent in the Khumbu Himal within the high Himalayan valleys south of Mt. Everest. These features are composed of massive matrix- and clast-supported diamicts that were formed from both hyperconcentrated flows and coarse-grained debris flows. Cosmogenic radionuclide (CRN) exposure ages for boulders on fans and terraces indicate that periods of fan and terrace formation occurred at c. 16, c. 12, c. 8, c. 4 and c. 1.5 ka, and are broadly coincident with the timing of glaciation in the region. The dating precision is insufficient to resolve whether the surfaces formed before, during or after the correlated glacial advance. However, the sedimentology, and morphostratigraphic and geomorphological relationships suggest that fan and terrace sedimentation in this part of the Himalaya primarily occurs during glacier retreat and is thus paraglacial in origin. Furthermore, modem glacial-lake outburst floods and their associated deposits are common in the Khumbu Himal as the result of glacial retreat during historical times. We therefore suggest that Late Quaternary and Holocene fan and terrace formation and sediment transfer are probably linked to temporal changes in discharge and sediment load caused by glacier oscillations responding to climate change. The timing of major sedimentation events in this region can be correlated with fans and terraces in other parts of the Himalaya, suggesting that major sedimentation throughout the Himalaya is synchronous and tied to regional climatic oscillations. Bedrock incision rates calculated from strath terrace ages average c. 3.9 mm a(-1), suggesting that the overall rate of incision is set by regional uplift. C1 US Geol Survey, Pacific Sci Ctr, Santa Cruz, CA 95060 USA. Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Barnard, PL (reprint author), US Geol Survey, Pacific Sci Ctr, 400 Nat Bridges Dr, Santa Cruz, CA 95060 USA. EM pbarnard@usgs.gov NR 73 TC 29 Z9 33 U1 0 U2 6 PU GEOLOGICAL SOC PUBL HOUSE PI BATH PA UNIT 7, BRASSMILL ENTERPRISE CENTRE, BRASSMILL LANE, BATH BA1 3JN, AVON, ENGLAND SN 0016-7649 J9 J GEOL SOC LONDON JI J. Geol. Soc. PD MAR PY 2006 VL 163 BP 383 EP 399 DI 10.1144/0016-764904-157 PN 2 PG 17 WC Geosciences, Multidisciplinary SC Geology GA 018SF UT WOS:000235784400013 ER PT J AU Wang, XJ Xiang, D Kim, TK Ihee, H AF Wang, XJ Xiang, D Kim, TK Ihee, H TI Potential of femtosecond electron diffraction using near-relativistic electrons from a photocathode RF electron gun SO JOURNAL OF THE KOREAN PHYSICAL SOCIETY LA English DT Article DE femtosecond; electron diffraction; RF gun ID X-RAY-DIFFRACTION; TRANSIENT MOLECULAR-STRUCTURES; ULTRAFAST DIFFRACTION; CRYSTALLOGRAPHY; CRYSTAL AB The electron beam from a photocathode RF electron gun is usually used to drive a free electron laser (FEL) after acceleration and to generate coherent radiation from 113, to X-rays. Building on our earlier proposal that such an electron beam itself can be used as scattering particles to produce a time-dependent diffraction signal, which contains structural information on a femtosecond resolution, here we further elucidate several important practical factors relevant to realizing electron diffraction on this time scale. A higher electrical field on the cathode of the RF gun can provide a larger number of electrons per bunch with a shorter temporal width compared to a typical DC gun, owing to a significant reduction in the space-charge effect. The near-relativistic speed of the electrons will further reduce the velocity mismatch and significantly improve the overall time resolution. However, the de Broglie wavelength of near-relativistic electrons at similar to 2 MeV is one order of magnitude shorter than that of the electrons generated by a typical DC gun operated at 30 keV. Consequently the Bragg angle is one order smaller and is comparable to the beam's intrinsic divergence, significantly blurring the observed diffraction pattern. Our simulations show that it is possible to restore the ideal diffraction pattern from the observed, blurred diffraction pattern; therefore, femtosecond electron diffraction using a photocathode BF gun can be a useful and practical tool. In addition, the sensitive dependence of the diffraction pattern on the electron beam divergence can be utilized to measure the divergence with high accuracy. C1 Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. Tsing Hua Univ, Dept Engn Phys, Beijing 100084, Peoples R China. Korea Adv Inst Sci & Technol, Dept Chem, Taejon 305701, South Korea. Korea Adv Inst Sci & Technol, Sch Mol Sci BK21, Taejon 305701, South Korea. RP Wang, XJ (reprint author), Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. EM hyotcherl.ihee@kaist.ac.kr RI Ihee, Hyotcherl/C-1614-2011; Xiang, Dao/P-2169-2015; KIM, TAE KYU/A-8737-2016 OI KIM, TAE KYU/0000-0002-9578-5722 NR 35 TC 47 Z9 47 U1 0 U2 10 PU KOREAN PHYSICAL SOC PI SEOUL PA 635-4, YUKSAM-DONG, KANGNAM-KU, SEOUL 135-703, SOUTH KOREA SN 0374-4884 J9 J KOREAN PHYS SOC JI J. Korean Phys. Soc. PD MAR PY 2006 VL 48 IS 3 BP 390 EP 396 PG 7 WC Physics, Multidisciplinary SC Physics GA 022EQ UT WOS:000236038100010 ER PT J AU Cai, W Arsenlis, A Weinberger, CR Bulatov, VV AF Cai, W Arsenlis, A Weinberger, CR Bulatov, VV TI A non-singular continuum theory of dislocations SO JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS LA English DT Article DE dislocation; self-force; singularity; spreading dislocation core ID GRADIENT ELASTICITY; FORCE AB We develop a non-singular, self-consistent framework for computing the stress field and the total elastic energy of a general dislocation microstructure. The expressions are self-consistent in that the driving force defined as the negative derivative of the total energy with respect to the dislocation position, is equal to the force produced by stress, through the Peach-Koehler formula. The singularity intrinsic to the classical continuum theory is removed here by spreading the Burgers vector isotropically about every point on the dislocation line using a spreading function characterized by a single parameter a, the spreading radius. A particular form of the spreading function chosen here leads to simple analytic formulations for stress produced by straight dislocation segments, segment self and interaction energies, and forces on the segments, For any value a > 0, the total energy and the stress remain finite everywhere, including on the dislocation lines themselves. Furthermore, the well-known singular expressions are recovered for a = 0. The value of the spreading radius a can be selected for numerical convenience, to reduce the stiffness of the dislocation equations of motion. Alternatively, a can be chosen to match the atomistic and continuum energies of dislocation configurations. (c) 2005 Elsevier Ltd. All rights reserved. C1 Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Cai, W (reprint author), Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA. EM caiwei@stanford.edu RI Weinberger, Christopher/E-2602-2011; OI Weinberger, Christopher/0000-0001-9550-6992; Cai, Wei/0000-0001-5919-8734 NR 26 TC 122 Z9 123 U1 2 U2 30 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0022-5096 J9 J MECH PHYS SOLIDS JI J. Mech. Phys. Solids PD MAR PY 2006 VL 54 IS 3 BP 561 EP 587 DI 10.1016/j.jmps.2005.09.005 PG 27 WC Materials Science, Multidisciplinary; Mechanics; Physics, Condensed Matter SC Materials Science; Mechanics; Physics GA 023NF UT WOS:000236132800005 ER PT J AU Karstens, W Bobela, DC Smith, DY AF Karstens, W Bobela, DC Smith, DY TI Impurity and free-carrier effects on the far-infrared dispersion spectrum of silicon SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION LA English DT Article ID N-TYPE SILICON; KRAMERS-KRONIG ANALYSIS; OPTICAL-CONSTANTS; REFRACTIVE-INDEX; EFFECTIVE-MASS; RED ABSORPTION; DOPED SILICON; SUM-RULES; GERMANIUM; SEMICONDUCTORS AB We investigate a generalized Cauchy power-series expansion for the index of refraction of an n-type elemental semiconductor in the region of IR transparency. A plot of index versus photon energy squared should be very nearly linear if all absorptions lie above the transparent region. However, free carriers produce far-IR absorption, and the dispersive signature of this is a deviation from linearity in the mid- to far-IR. By retaining terms with negative exponents in the index expansion, we find a substantially improved fit to index measurements. Moreover, the free-carrier density may be determined from the coefficients in the regression fit. The method has been used to evaluate several extensive index measurements for doped silicon found in the literature. (C) 2006 Optical Society of America. C1 St Michaels Coll, Colchester, VT 05439 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Vermont, Burlington, VT 05405 USA. RP Karstens, W (reprint author), St Michaels Coll, Colchester, VT 05439 USA. EM wkarstens@smcvt.edu NR 63 TC 2 Z9 2 U1 2 U2 9 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1084-7529 J9 J OPT SOC AM A JI J. Opt. Soc. Am. A-Opt. Image Sci. Vis. PD MAR PY 2006 VL 23 IS 3 BP 723 EP 729 DI 10.1364/JOSAA.23.000723 PG 7 WC Optics SC Optics GA 018EX UT WOS:000235747900026 PM 16539071 ER PT J AU Padilla, WJ Smith, DR Basov, DN AF Padilla, WJ Smith, DR Basov, DN TI Spectroscopy of metamaterials from infrared to optical frequencies SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID LEFT-HANDED METAMATERIALS; NEGATIVE REFRACTION; TERAHERTZ; RESONANCE; PLASMONS AB We review both the theoretical electromagnetic response and the spectroscopic measurements of metamaterials. To critically examine published results for metamaterial structures operating in the range from terahertz to optical frequencies, we focus on protocols allowing one to extract the optical constants from experimental observables. We discuss the complexity of this task when applied to metamaterials exhibiting electric, magnetic, and magneto-optical response. The general theory of the electromagnetic response of such systems is presented and methods are described. Finally, we briefly overview possible solutions for implementing metamaterials with tunable resonant behavior. (c) 2006 Optical Society of America. C1 Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. Duke Univ, Dept Elect & Comp Engn, Durham, NC 27708 USA. Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. RP Padilla, WJ (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Mat Sci & Technol Div, MS G756, Los Alamos, NM 87545 USA. EM willie@lanl.gov RI Smith, David/E-4710-2012; Padilla, Willie/A-7235-2008 OI Padilla, Willie/0000-0001-7734-8847 NR 36 TC 45 Z9 45 U1 0 U2 17 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD MAR PY 2006 VL 23 IS 3 BP 404 EP 414 DI 10.1364/JOSAB.23.000404 PG 11 WC Optics SC Optics GA 026BP UT WOS:000236312000003 ER PT J AU Koschny, T Moussa, R Soukoulis, CM AF Koschny, T Moussa, R Soukoulis, CM TI Limits on the amplification of evanescent waves of left-handed materials SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID REFRACTIVE-INDEX SLAB; PERFECT LENS AB We investigate the transfer function of the discretized perfect lens in finite-difference time-domain (FDTD) and transfer matrix method (TMM) simulations; the latter allow to eliminate the problems associated with the explicit time dependence in FDTD simulations. We also find that the finite discretization mesh acts like imaginary deviations from mu=epsilon=-1 and leads to a crossover in the transfer function from constance to exponential decay around k(parallel to,max) limiting the attainable super-resolution. We propose a simple qualitative model to describe the impact of the discretization. k(parallel to,max) is found to depend logarithmically on the mesh constant in qualitative agreement with the TMM simulations. (c) 2006 Optical Society of America. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. FORTH, Inst Elect Struct & Laser, GR-71110 Iraklion, Crete, Greece. RP Koschny, T (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM koschny@ameslab.gov RI Soukoulis, Costas/A-5295-2008 NR 13 TC 13 Z9 13 U1 0 U2 3 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD MAR PY 2006 VL 23 IS 3 BP 485 EP 489 DI 10.1364/JOSAB.23.000485 PG 5 WC Optics SC Optics GA 026BP UT WOS:000236312000013 ER PT J AU Gabitov, IR Indik, RA Litchinitser, NM Maimistov, AI Shalaev, VM Soneson, JE AF Gabitov, IR Indik, RA Litchinitser, NM Maimistov, AI Shalaev, VM Soneson, JE TI Double-resonant optical materials with embedded metal nanostructures SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID NEGATIVE INDEX; NANOPARTICLES; REFRACTION; METAMATERIALS; VERIFICATION; PARTICLES AB We derive equations modeling the resonant interaction of electric and magnetic components of light fields with metal nanostructures. This paired resonance was recently shown to produce negative refractive index. The model equations are a generalization of the well-known Maxwell-Lorentz model. We demonstrate that in the case of nonlinear polarization and linear magnetization, these equations are equivalent to a system of equations describing the resonant interaction of light with plasmonic oscillations in metal nanospheres. A family of solitary wave solutions is found that is similar to pulses associated with self-induced transparency in the framework of the Maxwell-Bloch model. The evolution of incident optical pulses is studied numerically, as are the collision dynamics of the solitary waves. These simulations reveal that the collision dynamics vary from near perfectly elastic to highly radiative, depending on the relative phase of the initial pulses. (c) 2006 Optical Society of America. C1 Univ Arizona, Dept Math, Tucson, AZ 85721 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA. Moscow Engn Phys Inst, Dept Solid State Phys, Moscow 115409, Russia. Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA. Univ Arizona, Program Appl Math, Tucson, AZ 85721 USA. RP Gabitov, IR (reprint author), Univ Arizona, Dept Math, 617 N Santa Rita Ave, Tucson, AZ 85721 USA. NR 17 TC 28 Z9 28 U1 0 U2 13 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD MAR PY 2006 VL 23 IS 3 BP 535 EP 542 DI 10.1364/JOSAB.23.000535 PG 8 WC Optics SC Optics GA 026BP UT WOS:000236312000019 ER PT J AU Guillen, DP Williams, BG AF Guillen, DP Williams, BG TI In-flight oxidation of aluminum in the twin-wire electric arc process SO JOURNAL OF THERMAL SPRAY TECHNOLOGY LA English DT Article DE aluminum coatings; oxidation; twin-wire electric arc process ID INTERNAL CIRCULATION; SPRAY DEPOSITION; REYNOLDS NUMBER; PARTICLES; STEEL AB This paper examines the in-flight oxidation of aluminum sprayed in air using the twin-wire electric arc (TWEA) thermal spray process. Aerodynamic shear at the droplet surface increases the amount of in-flight oxidation by promoting entrainment of the surface oxides within the molten droplet and continually exposing fresh fluid available for oxidation. Mathematical predictions herein confirm experimental measurements that reveal an elevated, nearly constant surface temperature (similar to 2273 K) of the droplets during flight. The calculated oxide volume fraction of a "typical" droplet with internal circulation compares favorably to the experimentally determined oxide content (3.3-12.7%) for a typical TWEA-sprayed aluminum coating sprayed onto a room temperature substrate. It is concluded that internal circulation within the molten aluminum droplet is a significant source of oxidation. This effect produces an oxide content nearly two orders of magnitude larger than that of a droplet without continual oxidation. C1 Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. Idaho State Univ, Pocatello, ID 83209 USA. RP Guillen, DP (reprint author), Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. EM Donna.Guillen@inl.gov RI Guillen, Donna/B-9681-2017 OI Guillen, Donna/0000-0002-7718-4608 NR 32 TC 7 Z9 7 U1 1 U2 2 PU ASM INTERNATIONAL PI MATERIALS PARK PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002 USA SN 1059-9630 J9 J THERM SPRAY TECHN JI J. Therm. Spray Technol. PD MAR PY 2006 VL 15 IS 1 BP 63 EP 71 DI 10.1361/105996306X92604 PG 9 WC Materials Science, Coatings & Films SC Materials Science GA 020GU UT WOS:000235897500014 ER PT J AU Watson, A Opresko, D Young, R Hauschild, V AF Watson, A Opresko, D Young, R Hauschild, V TI Development and application of acute exposure guideline levels (AEGLs) for chemical warfare nerve and sulfur mustard agents SO JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH-PART B-CRITICAL REVIEWS LA English DT Review ID GULF-WAR VETERANS; POSTWAR HOSPITALIZATION EXPERIENCE; PLASMA PARAOXONASE ARYLESTERASE; POSTTRAUMATIC-STRESS-DISORDER; INDUCED DELAYED NEUROTOXICITY; CORONARY-ARTERY-DISEASE; RED CELL CHOLINESTERASE; GUINEA-PIGS; SARIN VAPOR; GAS WORKERS AB Acute exposure guideline levels (AEGLs) have been developed for the chemical warfare agents GB, CA, GD, GF, VX, and sulfur mustard. These AEGLs were approved by the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances after Federal Register publication and comment, and judged as scientifically valid by the National Research Council Committee on Toxicology Subcommittee on AEGLs. AEGLs represent general public exposure limits for durations ranging from 10 min to 8 h, and for three levels of severity (AEGL-1, AEGL-2, AEGL-3). Mild effects are possible at concentrations greater than AEGL-1, while life-threatening effects are expected at concentrations greater than AECL-3. AEGLs can be applied to various civilian and national defense purposes, including evacuation and shelter-in-place protocols, reentry levels, protective clothing specifications, and analytical monitoring requirements. This report documents development and derivation of AEGL values for six key chemical warfare agents, and makes recommendations for their application to various potential exposure scenarios. C1 Oak Ridge Natl Lab, Div Life Sci, Toxicol & Hazard Assessment Grp, Oak Ridge, TN 37830 USA. US EPA, Off Emergency Management, Washington, DC 20460 USA. RP Watson, A (reprint author), Oak Ridge Natl Lab, Div Life Sci, Toxicol & Hazard Assessment Grp, 1060 Commerce Pk Dr, Oak Ridge, TN 37830 USA. EM waLsonap@ornl.gov NR 330 TC 20 Z9 20 U1 4 U2 19 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 1093-7404 J9 J TOXICOL ENV HEAL B JI J. Toxicol. Env. Health-Pt b-Crit. Rev. PD MAR-JUN PY 2006 VL 9 IS 2-3 BP 173 EP 263 DI 10.1080/15287390500194441 PG 91 WC Environmental Sciences; Public, Environmental & Occupational Health; Toxicology SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Toxicology GA 030AN UT WOS:000236605600003 PM 16621779 ER PT J AU Serrano, JR Xu, QQ Cahill, DG AF Serrano, JR Xu, QQ Cahill, DG TI Stress-induced wrinkling of sputtered SiO2 films on polymethylmethacrylate SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A LA English DT Article ID COMPRESSED ELASTIC FILM; THIN-FILMS; VISCOUS LAYER; MECHANICAL-STRESS; RELAXATION; KINETICS; MODULUS; ISLANDS; GLASS AB Compressively stressed SiO2 films are deposited by rf magnetron sputtering onto polymethylmethacrylate- (PMMA) coated Si substrates. The oxide film roughens by wrinkling during deposition; wrinkling is enabled by the viscous flow of the PMMA layer. The nanoscale lateral length scale of the wrinkling, similar to 120 nm, is established during the first few nanometers of film deposition and is controlled by the thickness and stress of the SiO2 film at the onset of the instability. Continued deposition of SiO2 leads to a rapid increase and then saturation of the rms roughness at similar to 5 nm. (c) 2006 American Vacuum Society. C1 Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA. Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA. RP Serrano, JR (reprint author), Sandia Natl Labs, POB 5800,MS 1310, Albuquerque, NM 87185 USA. RI Cahill, David/B-3495-2014 NR 25 TC 11 Z9 11 U1 1 U2 11 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 MAR-APR PY 2006 VL 24 IS 2 BP 324 EP 327 DI 10.1116/1.2171711 PG 4 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 024ZH UT WOS:000236234600026 ER PT J AU Adams, DP Vasile, MJ AF Adams, DP Vasile, MJ TI Accurate focused ion beam sculpting of silicon using a variable pixel dwell time approach SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article ID 3-DIMENSIONAL MICROFABRICATION; DEPTH CONTROL; TECHNOLOGY; YIELD; FABRICATION; SCAN AB This work demonstrates accurate focused ion beam sculpting of micron-scale curved shapes into initially planar solids. Sculpting is accomplished by varying the dose per pixel within individual boustrophedonic scans and accounting for the material-specific angle-dependent sputter yield and the ion beam spatial distribution. We refine this technique by demonstrating how a range of preferred dwell times leads to improved sculpting. An optimized dwell time range is delineated by two effects. Excessively large dwell times lead to enhanced deposition of ejected species, asymmetric milled features (when symmetric features are intended), and depths greater than intended values. These effects occur for dwell times such that the depth removed per pixel in a given scan is on the order of the width of the focused ion beam. On the other end of the dwell time range, inordinately low times lead to undesired ion milling outside targeted areas. Milling outside targeted regions, such as a circle or an ellipse, can occur because the ion beam is retraced to a rectilinear frame bounding the area. When dwell times are chosen to be on the order of the time to transit from the rectilinear frame to an outlined area edge, this leads to a significant dose over unintended areas, thereby producing a feature with irregular boundaries. Despite these two effects, a large range of acceptable dwell times (approximately three to four decades) can be established for milling most curved shapes. Hemispherical, parabolic, and sinusoidal features are demonstrated in Si(100). (c) 2006 American Vacuum Society. C1 Sandia Natl Labs, Thin Film Vacuum & Packaging Dept, Albuquerque, NM 87185 USA. RP Adams, DP (reprint author), Sandia Natl Labs, Thin Film Vacuum & Packaging Dept, POB 5800, Albuquerque, NM 87185 USA. EM dpadams@sandia.gov NR 37 TC 34 Z9 37 U1 1 U2 4 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 MAR-APR PY 2006 VL 24 IS 2 BP 836 EP 844 DI 10.1116/1.2184325 PG 9 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA 037UE UT WOS:000237172000059 ER PT J AU Edgcombe, CJ de Jonge, N AF Edgcombe, CJ de Jonge, N TI Properties of a field emitter deduced from curvature of its Fowler-Nordheim plot SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 18th International Vacuum Nanoelectronics Conference CY JUL 10-14, 2005 CL Oxford, ENGLAND ID THIN CARBON NANOTUBES; ELECTRON-EMISSION AB Recent experimental results on a carefully cleaned carbon nanotube show that the slope of its Fowler-Nordheim (FN) plot is not constant but increases slightly in magnitude as the anode-cathode voltage V-a is reduced. Theory for emission from a spherical surface shows that this curvature of slope increases with the curvature of the emitting surface. By detailed calculation using the change of FN slope, it is possible to deduce the radius of curvature of the emitting region, surface field, effective solid angle of emission, and an electron supply factor, all more accurately than is feasible using planar theory. (c) 2006 American Vacuum Society. C1 Univ Cambridge, Dept Phys, Cambridge CB3 0HE, England. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Philips Res Labs, Eindhoven, Netherlands. RP Edgcombe, CJ (reprint author), Univ Cambridge, Dept Phys, Cambridge CB3 0HE, England. EM cje1@cam.ac.uk RI de Jonge, Niels/B-5677-2008 NR 12 TC 10 Z9 11 U1 0 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 MAR-APR PY 2006 VL 24 IS 2 BP 869 EP 873 DI 10.1116/1.2179456 PG 5 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA 037UE UT WOS:000237172000065 ER PT J AU Islam, SK Durisety, C Vijayaraghavan, R Blalock, BJ Grundman, T Baylor, LR Gardner, WL AF Islam, SK Durisety, C Vijayaraghavan, R Blalock, BJ Grundman, T Baylor, LR Gardner, WL TI All-inverter complementary metal oxide semiconductor based dose control circuit for using vertically aligned carbon nanofibers in maskless lithography SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 18th International Vacuum Nanoelectronics Conference CY JUL 10-14, 2005 CL Oxford, ENGLAND ID BEAM ARRAY LITHOGRAPHY AB This article presents a prototype implementation of a circuit that can control charge emission from the vertically aligned carbon nanofibers (VACNFs), for use in the implementation of digital electrostatically focused e-beam array direct-write lithography. This lithography technique can be used to fabricate ultra-small feature size devices, while cutting down the manufacturing costs of photomasks [Baylor et al., J. Vac. Sci. Technol. B 20, 2646 (2002)]. These VACNFs are found to be quite robust for use as microfabricated field-emission devices [Bolton et al., Sens. Actuators B 85, 179 (2002)]. The all-inverter based dose control circuit presented in this article was fabricated using a standard 0.5 mu m complementary metal oxide semiconductor process to improve the dose-rate accuracy, when using these VACNFs for etching in maskless lithography. Simulation and measurement results are compared and analyzed, and future work for improving the design is discussed. 0 2006 American Vacuum Society. C1 Univ Tennessee, Dept Elect & Comp Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Islam, SK (reprint author), Univ Tennessee, Dept Elect & Comp Engn, Knoxville, TN 37996 USA. EM sislam@utk.edu NR 7 TC 2 Z9 2 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 MAR-APR PY 2006 VL 24 IS 2 BP 1026 EP 1029 DI 10.1116/1.2183783 PG 4 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA 037UE UT WOS:000237172000098 ER PT J AU Wu, HL Huang, YX Dykes, C Liu, DC Ma, JM Perelson, AS Demeter, LM AF Wu, HL Huang, YX Dykes, C Liu, DC Ma, JM Perelson, AS Demeter, LM TI Modeling and estimation of replication fitness of human immunodeficiency virus type 1 in vitro experiments by using a growth competition assay SO JOURNAL OF VIROLOGY LA English DT Article ID REVERSE-TRANSCRIPTASE; PROTEASE INHIBITORS; RELATIVE FITNESS; RESISTANCE; VIVO; DYNAMICS; TIME; DRUG AB Growth competition assays have been developed to quantify the relative fitnesses of human immunodeficiency virus (HIV-1) mutants. In this article we develop mathematical models to describe viral/cellular dynamic interactions in the assay experiment, from which new competitive fitness indices or parameters are defined. These indices include the log fitness ratio (LFR), the log relative fitness (LRF), and the production rate ratio (PRR). From the population genetics perspective, we clarify the confusion and correct the inconsistency in the definition of relative fitness in the literature of HIV-1 viral fitness. The LFR and LRF are easier to estimate from the experimental data than the PRR, which was misleadingly defined as the relative fitness in recent HIV-1 research literature. Calculation and estimation methods based on two data points and multiple data points were proposed and were carefully studied. In particular, we suggest using both standard linear regression (method of least squares) and a measurement error model approach for more-accurate estimates of competitive fitness parameters from multiple data points. The developed methodologies are generally applicable to any growth competition assays. A user-friendly computational tool also has been developed and is publicly available on the World Wide Web at http://www.urmc.rochester.edu/bstools/Vfitness/virusfitness.htm. C1 Univ Rochester, Dept Biostat & Computat Biol, Sch Med & Dent, Rochester, NY 14642 USA. Univ S Florida, Dept Epidemiol & Biostat, Coll Publ Hlth, Tampa, FL 33612 USA. Univ Rochester, Sch Med & Dent, Dept Med, Rochester, NY 14642 USA. Los Alamos Natl Lab, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA. RP Wu, HL (reprint author), Univ Rochester, Dept Biostat & Computat Biol, Sch Med & Dent, 601 Elmwood Ave,Box 630, Rochester, NY 14642 USA. EM hwu@bst.rochester.edu FU NIAID NIH HHS [N01 AI38858, U01 AI27658, U01 AI038858, U01 AI027658, R01 AI41387, R01 AI055290, R01 AI052765, R01 AI041387] NR 19 TC 40 Z9 40 U1 0 U2 1 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0022-538X J9 J VIROL JI J. Virol. PD MAR PY 2006 VL 80 IS 5 BP 2380 EP 2389 DI 10.1128/JVI.80.5.2380-2389.2006 PG 10 WC Virology SC Virology GA 013CY UT WOS:000235388400030 PM 16474144 ER PT J AU Wang, ZC Metcalf, B Ribeiro, RM McClure, H Kaur, A AF Wang, ZC Metcalf, B Ribeiro, RM McClure, H Kaur, A TI Th-1-type cytotoxic CD8(+) T-lymphocyte responses to simian immunodeficiency virus (SIV) are a consistent feature of natural SIV infection in sooty mangabeys SO JOURNAL OF VIROLOGY LA English DT Article ID CELLULAR IMMUNE-RESPONSES; PLASMA VIRAL LOAD; HIV-1 INFECTION; NONHUMAN-PRIMATES; TYPE-1 INFECTION; RHESUS-MACAQUES; HOST RESPONSES; ACTIVATION; VIREMIA; CELLS AB Sooty mangabeys are a natural host of simian immunodeficiency virus (SIV) that remain asymptomatic and do not exhibit increased immune activation or increased T-lymphocyte turnover despite sustained high levels of SIV viremia. In this study we asked whether an altered immune response to SIV contributes to the lack of immunopathology in sooty mangabeys as opposed to species with pathogenic lentivirus infection. SIV-specific cellular immune responses were investigated in a cohort of 25 sooty mangabeys with natural SIV infection. Gamma interferon (IFN-gamma) enzyme-linked immunospot (ELISPOT) assay responses targeting a median of four SIV proteins were detected in all 25 mangabeys and were comparable in magnitude to those of 13 rhesus macaques infected with SIVmac251 for more than 6 months. As with rhesus macaques, Th2 ELISPOT responses to SIV were absent or > 10-fold lower than the IFN-gamma ELISPOT response to the same SIV protein. The SIV-specific ELISPOT response was predominantly mediated by CD8(+) T lymphocytes; the frequency of circulating SIV-specific CD8(+) T lymphocytes ranged between 0.11% and 3.26% in 13 mangabeys. Functionally, the SIV-specific CD8(+) T lymphocytes were cytotoxic; secreted IFN-gamma, tumor necrosis factor alpha, and macrophage inflammatory protein 1 beta; and had an activated effector phenotype. Although there was a trend toward higher frequencies of SIV-specific CD8(+) T lymphocytes in mangabeys with lower viral loads, a significant inverse correlation between SIV viremia and SIV-specific cellular immunity was not detected. The consistent detection of Th1-type SIV-specific cellular immune responses in naturally infected sooty mangabeys suggests that immune attenuation is neither a feature of nor a requirement for maintenance of nonpathogenic SIV infection in its natural host. C1 Harvard Univ, Sch Med, Div Immunol, New England Primate Res Ctr, Southborough, MA 01772 USA. Emory Univ, Yerkes Natl Primate Res Ctr, Atlanta, GA 30322 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Kaur, A (reprint author), Harvard Univ, Sch Med, Div Immunol, New England Primate Res Ctr, 1 Pine Hill Dr, Southborough, MA 01772 USA. EM amitinder_kaur@hms.harvard.edu OI Ribeiro, Ruy/0000-0002-3988-8241 FU NCRR NIH HHS [P51 RR000168, P51RR00168]; NIAID NIH HHS [P30 AI050409, R01 AI049809, R01 AI49809] NR 57 TC 51 Z9 51 U1 0 U2 0 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0022-538X J9 J VIROL JI J. Virol. PD MAR PY 2006 VL 80 IS 6 BP 2771 EP 2783 DI 10.1128/JVI.80.6.2771-2783.2006 PG 13 WC Virology SC Virology GA 023MS UT WOS:000236131400018 PM 16501086 ER PT J AU Zuniga, R Lucchetti, A Galvan, P Sanchez, S Sanchez, C Hernandez, A Sanchez, H Frahm, N Linde, CH Hewitt, HS Hildebrand, W Altfeld, M Allen, TM Walker, BD Korber, BT Leitner, T Sanchez, J Brander, C AF Zuniga, R Lucchetti, A Galvan, P Sanchez, S Sanchez, C Hernandez, A Sanchez, H Frahm, N Linde, CH Hewitt, HS Hildebrand, W Altfeld, M Allen, TM Walker, BD Korber, BT Leitner, T Sanchez, J Brander, C TI Relative dominance of Gag p24-specific cytotoxic T lymphocytes is associated with human immunodeficiency virus control SO JOURNAL OF VIROLOGY LA English DT Article ID PLASMA VIRAL LOAD; TYPE-1 SUBTYPE-C; CELL RESPONSES; HIV-INFECTION; IMMUNODOMINANT REGIONS; ESCAPE MUTATION; CD8(+); TRANSMISSION; HLA; MAGNITUDE AB Conflicting data on the role of total virus- and protein-specific cytotoxic-T-lymphocyte (CTL) responses in the control of human immunodeficiency virus (HIV) disease progression exist. We present data generated from a Peruvian cohort of untreated, clade B-infected subjects, demonstrating that the proportion of Gag-specific, and in particular p24-reactive, CTL responses among the total virus-specific CTL activity is associated with individuals' CD4 counts and viral loads. Analyses in a second cohort in the United States confirm these findings and point towards a dominant role of Gag-specific immunity in effective control of HIV infection, providing important guidance for HIV vaccine development. C1 Massachusetts Gen Hosp, Partners AIDS Res Ctr, Charlestown, MA 02129 USA. Asociac Civil IMPACTA Salud & Educ, Lima, Peru. Univ Oklahoma, Norman, OK 73019 USA. Los Alamos Natl Lab, Los Alamos, NM USA. Santa Fe Inst, Santa Fe, NM 87501 USA. RP Brander, C (reprint author), Massachusetts Gen Hosp, Partners AIDS Res Ctr, 5th Floor,MGH E,5239,149 13th St, Charlestown, MA 02129 USA. EM cbrander@partners.org RI Allen, Todd/F-5473-2011; OI Brander, Christian/0000-0002-0548-5778; Korber, Bette/0000-0002-2026-5757 FU NIAID NIH HHS [N01-AI-15422, N01AI30024] NR 23 TC 196 Z9 204 U1 0 U2 4 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0022-538X J9 J VIROL JI J. Virol. PD MAR PY 2006 VL 80 IS 6 BP 3122 EP 3125 DI 10.1128/JVI.80.6.3122-3125.2006 PG 4 WC Virology SC Virology GA 023MS UT WOS:000236131400058 PM 16501126 ER PT J AU Neff, S Knobloch, R Hoffmann, DHH Tauschwitz, A Yu, SS AF Neff, S Knobloch, R Hoffmann, DHH Tauschwitz, A Yu, SS TI Transport of heavy-ion beams in a 1 m free-standing plasma channel SO LASER AND PARTICLE BEAMS LA English DT Article DE ARIES study; heavy-ion beam; inertial confinement fusion; plasma channel ID INERTIAL FUSION ENERGY; DISCHARGE CHANNELS; CHAMBER TRANSPORT; PERSPECTIVES; SIMULATION; DRIVER AB The transport Of high-current heavy-ion beams in plasma channels is a promising option for the final transport in a heavy-ion fusion reactor, since it simplifies the construction of the reactor chamber significantly. Our experiments at the Gesellschaft fur Schwerionenforschung demonstrate the creation of I m long stable plasma channels and the transport of heavy-ion beams. The article outlines the experimental Setup used at GS1 and reports the results of beam transport measurements using these long channels. The experiments demonstrate good beam transport properties of the channel, indicating that channel transport is a viable alternative to neutralized-ballistic transport. C1 Gesell Schwerionenforsch mbH, Dept Plasma Phys, Darmstadt, Germany. Tech Univ Darmstadt, Inst Kernphys, D-64287 Darmstadt, Germany. Lawrence Berkeley Lab, Berkeley, CA USA. RP Neff, S (reprint author), Gesell Schwerionenforsch mbH, Dept Plasma Phys, Darmstadt, Germany. EM x.neff@gsi.de RI Hoffmann, Dieter H.H./A-5265-2008 NR 21 TC 27 Z9 27 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH ST, NEW YORK, NY 10011-4211 USA SN 0263-0346 J9 LASER PART BEAMS JI Laser Part. Beams PD MAR PY 2006 VL 24 IS 1 BP 71 EP 80 DI 10.1017/S0263034606060125 PG 10 WC Physics, Applied SC Physics GA 027XI UT WOS:000236449000012 ER PT J AU Hu, JZ Wind, RA Rommereim, DN AF Hu, JZ Wind, RA Rommereim, DN TI H-1 relaxation times of metabolites in biological samples obtained with nondestructive ex-vivo slow-MAS NMR SO MAGNETIC RESONANCE IN CHEMISTRY LA English DT Article DE NMR; H-1; metabolites; T-1; T-2; T-1p; rat liver; slow magic angle spinning; 2D-PASS ID NUCLEAR-MAGNETIC-RESONANCE; HIGH-RESOLUTION H-1-NMR; ANGLE-SPINNING NMR; MR SPECTROSCOPY; IN-VIVO; RAT-LIVER; TISSUE; TUMORS; CELLS; WATER AB Methods suitable for measuring H-1 relaxation times such as T-1, T-2 and T-1p, of metabolites in small, intact biological objects including live cells, excised organs and tissues, oil seeds etc. are developed in this work. This was achieved by combining inversion-recovery, spin-echo, or a spin-lock segment with the phase-adjusted spinning sideband (PASS) technique, which was applied at low sample-spinning rates. Here, PASS was used to produce high-resolution H-1 spectra in a nondestructive way so that the relaxation parameters of individual metabolite could be determined. The methodologies were demonstrated by measuring H-1 T-1, T-2, and T1(p) of metabolites in excised rat liver at a spinning rate of 40 Hz. Copyright (c) 2006 John Wiley & Sons, Ltd. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Hu, JZ (reprint author), Pacific NW Natl Lab, POB 999,MS K8-98, Richland, WA 99352 USA. EM Jianzhi.Hu@pnl.gov RI Hu, Jian Zhi/F-7126-2012 NR 48 TC 7 Z9 7 U1 2 U2 7 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0749-1581 J9 MAGN RESON CHEM JI Magn. Reson. Chem. PD MAR PY 2006 VL 44 IS 3 BP 269 EP 275 DI 10.1002/mrc.1764 PG 7 WC Chemistry, Multidisciplinary; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA 021VK UT WOS:000236013800010 PM 16477679 ER PT J AU Van Bramer, SE Glatfelter, A Bai, S Dybowski, C Neue, G Perry, DL AF Van Bramer, SE Glatfelter, A Bai, S Dybowski, C Neue, G Perry, DL TI Solid-state Pb-207 NMR studies of lead-group 16 and mixed transition-metal/lead-group 16 element-containing materials SO MAGNETIC RESONANCE IN CHEMISTRY LA English DT Article DE Pb-207 NMR; solid-state NMR; lead selenide; lead selenate; calcium plumbate; strontium plumbite; barium plumbite; lead borate; lead zirconate; lead tungstate; lead meta-tantalate; lead niobate; lead molybdate; lead meta-vanadate; lead sulfite; lead sulfate; materials ID CHEMICAL-SHIFT TENSORS; X-RAY-DIFFRACTION; SINGLE-CRYSTAL; LEAD ZIRCONATE; QUANTUM DOTS; TEMPERATURE; REFINEMENT; PBSE; ANISOTROPY; WULFENITE AB Pb-207 solid-state NMR studies have been conducted on binary lead-group 16 and mixed transition-metal/lead group 16 materials, correlating the NMR chemical shifts of the materials with their structures. The experimental results show that the Pb-207 chemical shifts are strongly influenced by the local electronic structure. Data are reported for lead selenide, lead selenate, calcium plumbate, strontium plumbite, barium plumbite, lead borate, lead zirconate, lead tungstate, lead meta-tantalate, lead niobate, lead molybdate, lead meta-vanadate, lead sulfite, and lead sulfate. Copyright (c) 2006 John Wiley & Sons, Ltd. C1 Univ Delaware, Dept Chem & Biochem, Newark, DE 19716 USA. Widener Univ, Dept Chem, Chester, PA 19013 USA. Univ Dortmund, D-44221 Dortmund, Germany. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Dybowski, C (reprint author), Univ Delaware, Dept Chem & Biochem, Newark, DE 19716 USA. EM dybowski@udel.edu NR 38 TC 14 Z9 14 U1 2 U2 14 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0749-1581 J9 MAGN RESON CHEM JI Magn. Reson. Chem. PD MAR PY 2006 VL 44 IS 3 BP 357 EP 365 DI 10.1002/mrc.1751 PG 9 WC Chemistry, Multidisciplinary; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA 021VK UT WOS:000236013800020 PM 16477690 ER PT J AU Luliucci, R Taylor, C Hollis, WK AF Luliucci, R Taylor, C Hollis, WK TI H-1/Si-29 cross-polarization NMR experiments of silica-reinforced polydimethylsiloxane elastomers: probing the polymer-filler interface SO MAGNETIC RESONANCE IN CHEMISTRY LA English DT Article DE solid-state NMR; H-1/Si-29 cross-polarization; variable contact time; 2D heteronuclear correlation spectroscopy; polydimethylsiloxane; fumed silica; elastomer curing ID SOLID-STATE NMR; NUCLEAR-MAGNETIC-RESONANCE; ANGLE-SPINNING NMR; COMPOSITE-MATERIALS; MOLECULAR-DYNAMICS; CALCIUM SILICATE; SURFACE; SI-29; C-13; SPECTROSCOPY AB Polydimethylsiloxane (PDMS) elastomers reinforced with fumed silica exhibit unusual strength characteristics that are necessary for their designed applications. The microscopic details of the surface interaction between the polymer and silica are not well characterized. H-1/Si-29 cross-polarization (cp) experiments are used to characterize cured and uncured samples of Dow Corning silastic 745. Changes to the cp dynamics upon curing are evident by the variation in peak intensities in the variable contact-time spectra of the two samples. Estimates of the cp relaxation parameters are reported for the cured sample. Additional information can be obtained by expanding the H-1/Si-29 cp to a two-dimensional heteronuclear correlation experiment. Dramatic differences between the cured and uncured H-1/Si-29 HetCor spectra are observed that are not visible in the 1D spectra. These changes can be rationalized as a dehydration of the silica surface and an increased hardening of the polymer after the curing process. Furthermore, isolation of the NMR signal corresponding to nuclei at or near the polymer-filler interface may be achieved in the 2D H-1/Si-29 HetCor spectrum. C1 Washington & Jefferson Coll, Dept Chem, Washington, PA 15301 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Luliucci, R (reprint author), Washington & Jefferson Coll, Dept Chem, Washington, PA 15301 USA. EM riuliucci@washjeff.edu NR 41 TC 7 Z9 7 U1 1 U2 11 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0749-1581 J9 MAGN RESON CHEM JI Magn. Reson. Chem. PD MAR PY 2006 VL 44 IS 3 BP 375 EP 384 DI 10.1002/mrc.1763 PG 10 WC Chemistry, Multidisciplinary; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA 021VK UT WOS:000236013800022 ER PT J AU Enos, DG Levin, BL Henkebein, T AF Enos, DG Levin, BL Henkebein, T TI More on corrosion mitigation of once-through heat exchangers - Reply SO MATERIALS PERFORMANCE LA English DT Letter C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Enos, DG (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NATL ASSN CORROSION ENG PI HOUSTON PA 1440 SOUTH CREEK DRIVE, HOUSTON, TX 77084-4906 USA SN 0094-1492 J9 MATER PERFORMANCE JI Mater. Perform. PD MAR PY 2006 VL 45 IS 3 BP 10 EP 10 PG 1 WC Materials Science, Characterization & Testing SC Materials Science GA 022QZ UT WOS:000236072100003 ER PT J AU Pushin, VG Valiev, RZ Zhu, YT Gunderov, DV Korolev, AV Kourov, NI Kuntsevich, TE Valiev, EZ Yurchenko, LI AF Pushin, Vladimir G. Valiev, Ruslan Z. Zhu, Yuntian T. Gunderov, Dmitrii V. Korolev, Alexander V. Kourov, Nikolai I. Kuntsevich, Tatiana E. Valiev, Eduard Z. Yurchenko, Lyudmila I. TI Severe plastic deformation of melt-spun shape memory Ti2NiCu and Ni2MnGa alloys SO MATERIALS TRANSACTIONS LA English DT Article DE nanocrystallization; melt-spun alloys; severe plastic deformation; titanium-nickel-cuprum based alloy; nickel-manganese-gallium based alloy; martensitic transformation; shape memory AB This paper describes the influence of severe plastic deformation (SPD) on the structure, phase transformations, and physical properties of melt-spun Ti2NiCu-based and Ni2MnGa-based shape memory intermetallic alloys. It was found that the SPD by high pressure torsion (HPT) at room temperature can be effectively used for the synthesis of bulk nanostructured states in these initially submicro-grained or amorphized alloys obtained by melt-spinning method in the form of a ribbon. The subsequent low-temperature annealing of HPT-processed alloys leads to formation of homogeneous ultrafine nano-grained structure. This is connected with a very high degree and high homogeneity of deformation at SPD in the whole volume of deformed samples. C1 Russian Acad Sci, Ural Div, Inst Met Phys, Ekaterinburg 620041, Russia. Ufa State Aviat Tech Univ, Inst Adv Mat, Ufa 450000, Russia. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Pushin, VG (reprint author), Russian Acad Sci, Ural Div, Inst Met Phys, 18 S Kovalevskaya St, Ekaterinburg 620041, Russia. RI Zhu, Yuntian/B-3021-2008; Gunderov , Dmitry/G-6262-2013; Kuntsevich, Tatiana/J-4705-2013; Vladimir, Pushin/J-4807-2013; kourov, Nikolai/J-9421-2013; valiev, eduard/J-9337-2013; Alexander, Korolev/K-3036-2013 OI Zhu, Yuntian/0000-0002-5961-7422; Gunderov , Dmitry/0000-0001-5925-4513; Kuntsevich, Tatiana/0000-0003-1793-6457; Vladimir, Pushin/0000-0001-7569-0999; kourov, Nikolai/0000-0002-6104-9102; valiev, eduard/0000-0002-0760-0370; Alexander, Korolev/0000-0002-5104-3997 NR 13 TC 14 Z9 15 U1 1 U2 10 PU JAPAN INST METALS PI SENDAI PA 1-14-32, ICHIBANCHO, AOBA-KU, SENDAI, 980-8544, JAPAN SN 1345-9678 EI 1347-5320 J9 MATER TRANS JI Mater. Trans. PD MAR PY 2006 VL 47 IS 3 BP 546 EP 549 DI 10.2320/matertrans.47.546 PG 4 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 046CS UT WOS:000237789600022 ER PT J AU Lashley, JC Ledbetter, H Darling, TW Saxena, A Malinowski, A Hundley, MF Smith, JL Thoma, DJ AF Lashley, Jason C. Ledbetter, Hassel Darling, Tim W. Saxena, Avadh Malinowski, Artur Hundley, Michael F. Smith, James L. Thoma, Dan J. TI Free-energy density of the shape-memory alloy AuZn SO MATERIALS TRANSACTIONS LA English DT Article DE anharmonic phonons; B-phase alloy; boson peak; elastic anisotropy; fermi surface; gold-zinc; specific heat; thermal expansion ID ELASTIC-CONSTANTS; MARTENSITE; CADMIUM; AG AB The shape-memory alloy AuZn transforms martensitically (T-M = 65 K) from a cubic 132 (Pm3m) to a rhombohedral R-phase (P3) through softening of the TA(2)[110] phonon branch. We report elastic constants, specific heat, and thermal expansivity measurements through the transition. A large elastic anisotropy, A = 9 at T-M, associated with softening of the TA(2)[110] phonon branch accompanied with a volume change Delta V/V of 0.25% characterize the transition. We find that specific heat and thermal expansion are well represented by adding low-energy Einstein modes to the harmonic lattice. On the basis of these measurements, combined with established group-theoretical symmetry criteria, the free-energy density is presented with atomic shuffle displacements as the primary order parameter, Q. We use this free-energy model to explain the atomic displacements in the R-phase. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Lashley, JC (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Malinowski, Artur/A-2184-2015 OI Malinowski, Artur/0000-0003-3771-9353 NR 31 TC 3 Z9 3 U1 1 U2 7 PU JAPAN INST METALS PI SENDAI PA 1-14-32, ICHIBANCHO, AOBA-KU, SENDAI, 980-8544, JAPAN SN 1345-9678 EI 1347-5320 J9 MATER TRANS JI Mater. Trans. PD MAR PY 2006 VL 47 IS 3 BP 587 EP 593 DI 10.2320/matertrans.47.587 PG 7 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 046CS UT WOS:000237789600029 ER PT J AU Balogh, Z Daroczi, L Harasztosi, L Beke, DL Lograsso, TA Schlagel, DL AF Balogh, Zoltdn Daroczi, Lajos Harasztosi, Lajos Beke, Dezso L. Lograsso, Thomas A. Schlagel, Deborah L. TI Magnetic emission during austenite-martensite transformation in Ni2MnGa shape memory alloy SO MATERIALS TRANSACTIONS LA English DT Article DE ferromagnetic shape memory; critical exponent; magnetic emission; nickel-manganese-gallium; Barkhausen noise ID SELF-ORGANIZED CRITICALITY; ACOUSTIC-EMISSION; BARKHAUSEN NOISE; DISTRIBUTIONS; TRANSITIONS; AVALANCHES AB The magnetic emission signals, accompanying the martensitic transition in Ni2MnGa magnetic shape memory alloy, are studied. The width (duration) and height (amplitude) distributions of the signals exhibit a power-law behaviour, with exponents alpha and beta respectively. The values of alpha and beta are characteristic of the magnetic noise originating from the transition itself and both have the value of 3.0 +/- 0.15. C1 Univ Debrecen, Dept Solid State Phys, H-4010 Debrecen, Hungary. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RP Balogh, Z (reprint author), Univ Debrecen, Dept Solid State Phys, POB 2, H-4010 Debrecen, Hungary. NR 14 TC 10 Z9 10 U1 0 U2 4 PU JAPAN INST METALS PI SENDAI PA 1-14-32, ICHIBANCHO, AOBA-KU, SENDAI, 980-8544, JAPAN SN 1345-9678 EI 1347-5320 J9 MATER TRANS JI Mater. Trans. PD MAR PY 2006 VL 47 IS 3 BP 631 EP 634 DI 10.2320/matertrans.47.631 PG 4 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 046CS UT WOS:000237789600037 ER PT J AU Pushin, VG Valiev, RZ Zhu, YT Gunderov, DV Kourov, NI Kuntsevich, TE Uksusnikov, AN Yurchenko, LI AF Pushin, Vladimir G. Valiev, Ruslan Z. Zhu, Yuntian T. Gunderov, Dmitrii V. Kourov, Nikolai I. Kuntsevich, Tatiana E. Uksusnikov, Alexei N. Yurchenko, Lyudmila I. TI Effect of severe plastic deformation on the behavior of Ti-Ni shape memory alloys SO MATERIALS TRANSACTIONS LA English DT Article DE titanium-nickel-based alloys; severe plastic deformation; nanostructure; martensite transformation; shape memory AB The nanostructured TiNi-based shape-memory alloys were synthesized by severe plastic deformation (SPD), including high pressure torsion, equal-channel angular pressing, and multi-step SPD deformations (SPD plus cold rolling or drawing). It is found that the SPD processing changed the morphology of the martensite and temperature of martensite transformation. Also, we found that the mechanical and shape memory properties can be enhanced by forming nanostructures in these alloys. SPD processing renders higher strength, higher yield dislocation strength and in results-higher recovery stress (up to 1.5 GPa) and maximum reverse strain (up to 10%) of shape memory, which are desirable in various practical application. C1 Russian Acad Sci, Inst Met Phys, Ural Div, Ekaterinburg 620041, Russia. Ufa State Aviat Tech Univ, Inst Adv Mat, Ufa 450000, Russia. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Pushin, VG (reprint author), Russian Acad Sci, Inst Met Phys, Ural Div, 18 S Kovalevskaya St, Ekaterinburg 620041, Russia. RI Zhu, Yuntian/B-3021-2008; Gunderov , Dmitry/G-6262-2013; Kuntsevich, Tatiana/J-4705-2013; Uksusnikov, Alexey/J-5270-2013; Vladimir, Pushin/J-4807-2013; kourov, Nikolai/J-9421-2013 OI Zhu, Yuntian/0000-0002-5961-7422; Gunderov , Dmitry/0000-0001-5925-4513; Kuntsevich, Tatiana/0000-0003-1793-6457; Uksusnikov, Alexey/0000-0003-2551-8968; Vladimir, Pushin/0000-0001-7569-0999; kourov, Nikolai/0000-0002-6104-9102 NR 10 TC 16 Z9 16 U1 0 U2 11 PU JAPAN INST METALS PI SENDAI PA 1-14-32, ICHIBANCHO, AOBA-KU, SENDAI, 980-8544, JAPAN SN 1345-9678 EI 1347-5320 J9 MATER TRANS JI Mater. Trans. PD MAR PY 2006 VL 47 IS 3 BP 694 EP 697 DI 10.2320/matertrans.47.694 PG 4 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 046CS UT WOS:000237789600048 ER PT J AU Fan, C Kecskes, L Jiao, T Choo, H Inoue, A Liaw, P AF Fan, Cang Kecskes, Laszlo Jiao, Tong Choo, Hahn Inoue, Akihisa Liaw, Peter TI Shear-band deformation in amorphous alloys and composites SO MATERIALS TRANSACTIONS LA English DT Article DE bulk metallic glasses; shear bands; structures; composites; deformation ID METALLIC GLASSES; EVOLUTION AB The deformation of monolithic bulk-metallic glasses (BMGs), nanocrystal-containing, and micrometer-sized, ductile-particle-reinforced bulk metallic glass composites (BMGCs) has been investigated. The number density of shear bands, the interaction of shear bands with the particles, as well as the apparent plasticity was found to be significantly different in three types of samples before failure occurred. The interaction of shear bands with the micrometer-sized particles implied that shear bands can be initiated by stress concentration at the particle boundaries and, at the same time, absorbed by the deformation of particles. It is hypothesized that the observed number density and motion of shear bands could arise from the interaction of rotational sliding of medium range order (MRO) or dense-packed clusters, fine crystals, and the free volume in the material. An estimate of the shear band thickness, based on the size of particles or grains near and in the shear bands of the BMGs, BMGCs, and ultra-fine structured materials is consistent with this conjecture. C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37916 USA. USA, Res Lab, Aberdeen Proving Ground, MD 21005 USA. Brown Univ, Div Engn, Providence, RI 02912 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Tohoku Univ, Mat Res Inst, Sendai, Miyagi 9808577, Japan. RP Fan, C (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37916 USA. RI Choo, Hahn/A-5494-2009; Kecskes, Laszlo/F-6880-2014; Inoue, Akihisa/E-5271-2015 OI Choo, Hahn/0000-0002-8006-8907; Kecskes, Laszlo/0000-0002-1342-3729; NR 15 TC 9 Z9 9 U1 1 U2 6 PU JAPAN INST METALS PI SENDAI PA 1-14-32, ICHIBANCHO, AOBA-KU, SENDAI, 980-8544, JAPAN SN 1345-9678 EI 1347-5320 J9 MATER TRANS JI Mater. Trans. PD MAR PY 2006 VL 47 IS 3 BP 817 EP 821 DI 10.2320/matertrans.47.817 PG 5 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 046CS UT WOS:000237789600069 ER PT J AU Ciupe, MS Bivort, BL Bortz, DM Nelson, PW AF Ciupe, MS Bivort, BL Bortz, DM Nelson, PW TI Estimating kinetic parameters from HIV primary infection data through the eyes of three different mathematical models SO MATHEMATICAL BIOSCIENCES LA English DT Article DE HIV; primary infection; time delays; Monte Carlo; jackknifing; model sensitivity ID DYNAMICS IN-VIVO; CELL; RESPONSES; PROLIFERATION; GENERATION AB The dynamics of HIV-1 infection consist of three distinct phases starting with primary infection, then latency and finally AIDS or drug therapy. In this paper we model the dynamics of primary infection and the beginning of latency. We show that allowing for time delays in the model better predicts viral load data when compared to models with no time delays. We also find that our model of primary infection predicts the turnover rates for productively infected T cells and viral totals to be much longer than compared to data from patients receiving anti-viral drug therapy. Hence the dynamics of the infection can change dramatically from one stage to the next. However, we also show that with the data available the results are highly sensitive to the chosen model. We compare the results using analysis and Monte Carlo techniques for three different models and show how each predicts rather dramatic differences between the fitted parameters. We show, using a chi(2) test, that these differences between models are statistically significant and using a jackknifing method, we find the confidence intervals for the parameters. These differences in parameter estimations lead to widely varying conclusions about HIV pathogenesis. For instance, we find in our model with time delays the existence of a Hopf bifurcation that leads to sustained oscillations and that these oscillations could simulate the rapid turnover between viral strains and the appropriate CTL response necessary to control the virus, similar to that of a predator-prey type system. (c) 2006 Elsevier Inc. All rights reserved. C1 Univ Michigan, Dept Math, Math Biol Res Grp, Ann Arbor, MI 48109 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Harvard Univ, Dept Mol & Cellular Biol, Cambridge, MA 02138 USA. RP Nelson, PW (reprint author), Univ Michigan, Dept Math, Math Biol Res Grp, 530 Church St, Ann Arbor, MI 48109 USA. EM pwn@umich.edu RI Bortz, David/E-8797-2012 OI Bortz, David/0000-0003-1163-7317 NR 24 TC 43 Z9 43 U1 0 U2 6 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 MAR PY 2006 VL 200 IS 1 BP 1 EP 27 DI 10.1016/j.mbs.2005.12.006 PG 27 WC Biology; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology GA 023ZK UT WOS:000236164500001 PM 16469337 ER PT J AU Lieuwen, T Richards, G AF Lieuwen, T Richards, G TI Burning questions - Combustion research prepares for the more complex fuel supply of the near future. SO MECHANICAL ENGINEERING LA English DT Article C1 Georgia Inst Technol, Sch Aerosp Engn, Atlanta, GA 30332 USA. Natl Energy Technol Lab, Pittsburgh, PA USA. Natl Energy Technol Lab, Morgantown, WV USA. RP Lieuwen, T (reprint author), Georgia Inst Technol, Sch Aerosp Engn, Atlanta, GA 30332 USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA SN 0025-6501 J9 MECH ENG JI Mech. Eng. PD MAR PY 2006 VL 128 IS 3 BP 40 EP 42 PG 3 WC Engineering, Mechanical SC Engineering GA 019FR UT WOS:000235821500031 ER PT J AU Martin, ME Wabuyele, M Panjehpour, M Overholt, B DeNovo, R Kennel, S Cunningham, G Vo-Dinh, T AF Martin, ME Wabuyele, M Panjehpour, M Overholt, B DeNovo, R Kennel, S Cunningham, G Vo-Dinh, T TI An AOTF-based dual-modality hyperspectral imaging system (DMHSI) capable of simultaneous fluorescence and reflectance imaging SO MEDICAL ENGINEERING & PHYSICS LA English DT Article DE hyperspectral fluorescence spectroscopy; acousto-optic tunable filters; medical imaging; biomedical optics; laser-induced fluorescence ID ACOUSTOOPTIC TUNABLE FILTER; BARRETTS-ESOPHAGUS; CANCER-DIAGNOSIS; MICROSCOPE; ENDOSCOPY; BIOPSY AB An acousto-optic tunable filter (AOTF)-based system for dual-modality hyperspectral imaging (DMHSI) has been developed for use in characterization of normal and malignant mouse tissue. The system consists of a laser, endoscope, AOTE and two cameras coupled with optics and electronics. Initial results show that the system can delineate normal and malignant mouse tissues real-time. The analysis shows that malignant tissues consistently exhibit less fluorescent intensity in the wavelength band from 440 to 540 nm with a peak intensity of around 490 nm. The analysis also shows key spectroscopic differences between normal and malignant tissues. Further, these results are compared to real-time spectroscopic data and show good correlation. (c) 2005 IPEM. Published by Elsevier Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Div Life Sci, Ctr Adv Biomed Photon, Oak Ridge, TN 37831 USA. Tennessee Technol Univ, Dept Mech Engn, Cookeville, TN 38501 USA. Thompson Canc Ctr, Knoxville, TN 37916 USA. Univ Tennessee, Sch Vet, Dept Small Anim Clin Sci, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Ctr Mammalian Genet, Oak Ridge, TN 37831 USA. RP Vo-Dinh, T (reprint author), Oak Ridge Natl Lab, Div Life Sci, Ctr Adv Biomed Photon, POB 2008, Oak Ridge, TN 37831 USA. EM vodinht@ornl.gov FU NCI NIH HHS [R01 CA88787-01] NR 25 TC 18 Z9 21 U1 1 U2 7 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 1350-4533 J9 MED ENG PHYS JI Med. Eng. Phys. PD MAR PY 2006 VL 28 IS 2 BP 149 EP 155 DI 10.1016/j.medengphy.2005.04.022 PG 7 WC Engineering, Biomedical SC Engineering GA 012HI UT WOS:000235328700005 PM 15955718 ER PT J AU Li, TF Liang, ZR Singanallur, JV Satogata, TJ Williams, DC Schulte, RW AF Li, TF Liang, ZR Singanallur, JV Satogata, TJ Williams, DC Schulte, RW TI Reconstruction for proton computed tomography by tracing proton trajectories: A Monte Carlo study SO MEDICAL PHYSICS LA English DT Article DE proton CT; multiple Coulomb scattering; curved proton path; ART algorithm ID MULTIPLE COULOMB SCATTERING; RESOLUTION AB Proton computed tomography (pCT) has been explored in the past decades because of its unique imaging characteristics, low radiation dose, and its possible use for treatment planning and on-line target localization in proton therapy. However, reconstruction of pCT images is challenging because the proton path within the object to be imaged is statistically affected by multiple Coulomb scattering. In this paper, we employ GEANT4-based Monte Carlo simulations of the two-dimensional pCT reconstruction of an elliptical phantom to investigate the possible use of the algebraic reconstruction technique (ART) with three different path-estimation methods for pCT reconstruction. The first method assumes a straight-line path (SLP) connecting the proton entry and exit positions, the second method adapts the most-likely path (MLP) theoretically determined for a uniform medium, and the third method employs a cubic spline path (CSP). The ART reconstructions showed progressive improvement of spatial resolution when going from the SLP [2 line pairs (lp) cm(-1)] to the curved CSP and MLP path estimates (5 lp cm(-1)). The MLP-based ART algorithm had the fastest convergence and smallest residual error of all three estimates. This work demonstrates the advantage of tracking curved proton paths in conjunction with the ART algorithm and curved path estimates. (c) 2006 American Association of Physicists in Medicine. C1 SUNY Stony Brook, Dept Radiol, Stony Brook, NY 11794 USA. SUNY Stony Brook, Dept Comp Sci, Stony Brook, NY 11794 USA. SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA. Loma Linda Univ, Med Ctr, Dept Radiat Med, Loma Linda, CA 92354 USA. RP Liang, ZR (reprint author), SUNY Stony Brook, Dept Radiol, Stony Brook, NY 11794 USA. EM jzl@mil.sunysb.edu FU NCI NIH HHS [CA82402, R01 CA082402] NR 27 TC 70 Z9 70 U1 0 U2 9 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 MAR PY 2006 VL 33 IS 3 BP 699 EP 706 DI 10.1118/1.2171507 PG 8 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 025KF UT WOS:000236263900014 PM 16878573 ER PT J AU Blobaum, KJM Krenn, CR Mitchell, JN Haslam, JJ Wall, MA Massalski, TB Schwartz, AJ AF Blobaum, KJM Krenn, CR Mitchell, JN Haslam, JJ Wall, MA Massalski, TB Schwartz, AJ TI Evidence of transformation bursts during thermal cycling of a Pu-Ga alloy SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID PHASE-TRANSFORMATIONS; ACOUSTIC-EMISSION; PLUTONIUM; MARTENSITE; KINETICS; NUCLEATION; STABILITY; SYSTEM AB The thermodynamics and kinetics of the fcc (delta) to monoclinic (alpha-prime) phase transformation and its reversion in a plutonium-gallium alloy have been studied using differential scanning calorimetry, resistometry, and dilatometry. Under ambient conditions, the delta phase is metastable in a Pu-2.0 at. pct Ga alloy. Thermal cycling to below the ambient temperature results in a partial transformation to the alpha-prime phase; this transformation is composition-invariant and exhibits martensitic behavior. Because this transformation results in an unusually large 25 vol pct contraction that cannot be fully accommodated by purely elastic adjustments, the transformation mode is expected to involve burst formation of individual alpha-prime particles. However, upon cooling, these individual bursts were not resolved by the above techniques, although signals corresponding to the overall accumulation of many alpha-prime particles were observed. On the other hand, upon heating, signals from differential scanning calorimetry, resistometry, and dilatometry showed a series of discrete changes Occurring in periodic increments beginning at approximately 32 degrees C. These features correspond to the cooperative reversion of many alpha-prime particles to the delta phase; they appear to be the result of an interplay between the autocatalytically driven reversion of a cascade of individual martensite units and self-quenching caused by small changes of temperature or stress accompanying each individual transformation burst. The heat of the delta/alpha-prime transformation is estimated to be about +4 kJ/mol. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. RP Blobaum, KJM (reprint author), Lawrence Livermore Natl Lab, POB 5508, Livermore, CA 94550 USA. EM blobauml@llnl.gov RI Mitchell, Jeremy/E-2875-2010 OI Mitchell, Jeremy/0000-0001-7109-3505 NR 37 TC 27 Z9 27 U1 3 U2 7 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD MAR PY 2006 VL 37A IS 3 BP 567 EP 577 DI 10.1007/s11661-006-0029-7 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 018UX UT WOS:000235791400007 ER PT J AU Muddle, BC Aaronson, HI Kelly, PM Srinivasan, GR Kelly, PM Laughlin, DE Reynolds, WT Braun, M Purdy, G Zhang, WZ Howe, JM Zhang, MX Soffa, WA Baskes, MI Vasudevan, VK DeTavernier, C Furuhara, T Hillert, M Pond, RC Shiflet, GJ AF Muddle, BC Aaronson, HI Kelly, PM Srinivasan, GR Kelly, PM Laughlin, DE Reynolds, WT Braun, M Purdy, G Zhang, WZ Howe, JM Zhang, MX Soffa, WA Baskes, MI Vasudevan, VK DeTavernier, C Furuhara, T Hillert, M Pond, RC Shiflet, GJ TI General discussion session of the 2004 Hume-Rothery Symposium on "The structure and diffusional growth mechanisms of irrational interphase boundaries" SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Editorial Material C1 Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA. Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA. Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA. Monash Univ, Clayton, Vic 3168, Australia. Univ Queensland, St Lucia, Qld 4067, Australia. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Pretoria, ZA-0002 Pretoria, South Africa. McMaster Univ, Hamilton, ON L8S 4L8, Canada. Tsing Hua Univ, Beijing 100084, Peoples R China. Univ Virginia, Charlottesville, VA 22903 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Ghent, B-9000 Ghent, Belgium. Kyoto Univ, Kyoto, Japan. Royal Inst Technol, Stockholm, Sweden. Univ Liverpool, Liverpool L69 3BX, Merseyside, England. RI Furuhara, Tadashi/B-2149-2010 OI Furuhara, Tadashi/0000-0002-7445-1264 NR 0 TC 2 Z9 2 U1 0 U2 1 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD MAR PY 2006 VL 37A IS 3A BP 961 EP 974 PG 14 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 024VB UT WOS:000236223300017 ER PT J AU El-Dasher, BS Edgecumbe, TS Torres, SG AF El-Dasher, BS Edgecumbe, TS Torres, SG TI The effect of solution annealing on the microstructural behavior of alloy 22 welds SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID GRAIN-BOUNDARY MOTION; RECRYSTALLIZATION; STABILITY; NICKEL; C-22 AB Multipass gas tungsten arc welds of alloy 22 were subjected to solution annealing durations of 20 minutes, 24 hours, 72 hours, and 1 week at temperatures of 1075 degrees C, 1121 degrees C, 1200 degrees C, and 1300 degrees C. The specimens were studied in cross section by secondary electron microscopy to determine the effect of solution annealing on tetrahedrally close-packed (TCP) precipitate stability. Electron backscatter diffraction mapping was also performed on all of the specimens to determine the recrystallization behavior of the welds. It was found that complete TCP precipitate dissolution Occurs after solution annealing at 1075 degrees C and 1121 degrees C for 24 hours, and at 1200 degrees C and 1300 degrees C for durations of 20 minutes. Regions of most rapid recrystallization were correlated to the regions of lowest solute content, highest plastic strain, and highest residual stresses. Texture analysis indicated that while the columnar dendrites originally present: in the weld grew with a < 001 > orientation in the transverse direction (approximately opposite the heat flow direction), the recrystallized grains adopt a < 101 > orientation in the transverse direction when recrystallization and TCP phase dissolution occur simultaneously. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP El-Dasher, BS (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM eldasher2@llnl.gov NR 33 TC 4 Z9 5 U1 0 U2 4 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD MAR PY 2006 VL 37A IS 3A BP 1027 EP 1038 DI 10.1007/s11661-006-1022-x PG 12 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 024VB UT WOS:000236223300023 ER PT J AU Hildebrand, AR McCausland, PJA Brown, PG Longstaffe, FJ Russell, SDJ Tagliaferrii, E Wacker, JF Mazur, MJ AF Hildebrand, AR McCausland, PJA Brown, PG Longstaffe, FJ Russell, SDJ Tagliaferrii, E Wacker, JF Mazur, MJ TI The fall and recovery of the Tagish Lake meteorite SO METEORITICS & PLANETARY SCIENCE LA English DT Article ID CARBONACEOUS CHONDRITES; ASTEROIDS; ORBIT; EARTH; TRAJECTORIES; MINERALOGY; FIREBALLS; POROSITY; IMPACTS; NETWORK AB The Tagish Lake C2 (ungrouped) carbonaceous chondrite fall of January 18, 2000, delivered similar to 10 kg of one of the most primitive and physically weak meteorites yet studied. In this paper, we report the detailed circumstances of the fall and the recovery of all documented Tagish Lake fragments from a strewnfield at least 16 km long and 3 to 4 km wide. Nearly 1 kg of '' pristine '' meteorites were collected one week after the fall before new snow covered the strewn field; the majority of the recovered mass was collected during the spring melt. Ground eyewitnesses and a variety of instrument-recorded observations of the Tagish Lake fireball provide a refined estimate of the fireball trajectory. From its calculated orbit and its similarity to the remotely sensed properties of the D- and P-class asteroids, the Tagish Lake carbonaceous chondrite apparently represents these outer belt asteroids. The cosmogenic nuclide results and modeled production indicate a prefall radius of 2.1-2.4 m (corresponding to 60-90 tons) consistent with the observed fireball energy release. The bulk oxygen-isotope compositions plot just below the terrestrial fractionation line (TFL), following a trend similar to the CM meteorite mixing line. The bulk density of the Tagish Lake material (1.64 0.02 g/cm(3)) is the same, within uncertainty, as the total bulk densities of several C-class and especially D- and P-class asteroids. The high microporosity of Tagish Lake samples (similar to 40%) provides an obvious candidate material for the composition of low bulk density primitive asteroids. C1 Univ Calgary, Dept Geol & Geophys, Calgary, AB T2N 1N4, Canada. Univ Western Ontario, Dept Earth Sci, London, ON N6A 5B7, Canada. Univ Western Ontario, Dept Phys & Astron, London, ON N6A 3K7, Canada. ET Space Syst, Camarillo, CA 93012 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Hildebrand, AR (reprint author), Univ Calgary, Dept Geol & Geophys, Calgary, AB T2N 1N4, Canada. EM ahildebr@ucalgary.ca; pbrown@uwo.ca NR 61 TC 42 Z9 42 U1 2 U2 9 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 USA SN 1086-9379 J9 METEORIT PLANET SCI JI Meteorit. Planet. Sci. PD MAR PY 2006 VL 41 IS 3 BP 407 EP 431 PG 25 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 029ZN UT WOS:000236603000006 ER PT J AU Rachman, H Strong, M Schaible, U Schuchhardt, J Hagens, K Mollenkopf, H Eisenberg, D Kaufmann, SHE AF Rachman, H Strong, M Schaible, U Schuchhardt, J Hagens, K Mollenkopf, H Eisenberg, D Kaufmann, SHE TI Mycobacterium tuberculosis gene expression profiling within the context of protein networks SO MICROBES AND INFECTION LA English DT Article DE tuberculosis; protein networks; microarray; macrophages ID ESCHERICHIA-COLI; PHAGOSOME MATURATION; GLYOXYLATE CYCLE; MACROPHAGES; VIRULENCE; ATTENUATION; SURVIVAL; GROWTH; PYROPHOSPHATASE; DISRUPTION AB As one of the world's most successful intracellular pathogens, Mycobacterium tuberculosis, the causative agent of human tuberculosis, is responsible for two to three million deaths annually. The pathogenicity of M. tuberculosis relies on its ability to survive and persist within host macrophage cells during infection. It is of central importance, therefore, to identify genes and pathways that are involved in the survival and persistence of M. tuberculosis within these cells. Utilizing genome-wide DNA arrays we have identified M. tuberculosis genes that are specifically induced during macrophage infection. To better understand the cellular context of these differentially expressed genes, we have also combined our array analyses with computational methods of protein network identification. Our combined approach reveals certain signatures of M. tuberculosis residing within macrophage cells, including the induction of genes involved in DNA damage repair, fatty acid degradation, iron metabolism, and cell wall metabolism. (c) 2005 Elsevier SAS. All rights reserved. C1 Max Planck Inst Infect Biol, Dept Immunol, D-10117 Berlin, Germany. Univ Calif Los Angeles, Inst Mol Biol, DOE Inst Genomics & Prote, Howard Hughes Med Inst, Los Angeles, CA USA. MicroDiscovery GmbH, Berlin, Germany. RP Kaufmann, SHE (reprint author), Max Planck Inst Infect Biol, Dept Immunol, Schumannstr 21-22, D-10117 Berlin, Germany. EM kaufmann@mpiib-berlin.mpg.de RI Kaufmann, Stefan HE/I-5454-2014 OI Kaufmann, Stefan HE/0000-0001-9866-8268 FU NIGMS NIH HHS [GM07185] NR 51 TC 45 Z9 47 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1286-4579 J9 MICROBES INFECT JI Microbes Infect. PD MAR PY 2006 VL 8 IS 3 BP 747 EP 757 DI 10.1016/j.micinf.2005.09.011 PG 11 WC Immunology; Infectious Diseases; Microbiology SC Immunology; Infectious Diseases; Microbiology GA 045PL UT WOS:000237754000020 PM 16513384 ER PT J AU De Windt, W Gao, HC Kromer, W Van Damme, P Dick, J Mast, J Boon, N Zhou, JZ Verstraete, W AF De Windt, W Gao, HC Kromer, W Van Damme, P Dick, J Mast, J Boon, N Zhou, JZ Verstraete, W TI AggA is required for aggregation and increased biofilm formation of a hyper-aggregating mutant of Shewanella oneidensis MR-1 SO MICROBIOLOGY-SGM LA English DT Article ID ENTEROAGGREGATIVE ESCHERICHIA-COLI; MICROBIAL IRON RESPIRATION; PSEUDOMONAS-PUTIDA; ACTIVATED-SLUDGE; EXPRESSION; ADHERENCE; AUTOAGGREGATION; CORROSION; SURFACES; ADHESION AB Shewanella oneidensis COAG, a hyper-aggregating mutant of MR-1, was isolated from a rifampicin-challenged culture. Compared to the wild-type, COAG exhibited increased biofilm formation on glass carrier material. The role of surface-located proteins in the process of COAG auto-aggregation was confirmed by different proteolytic treatments of the aggregates. All of the tested proteolytic enzymes resulted in deflocculation within 3 In of incubation. In order to examine the altered expression of outer-membrane proteins in COAG, membrane-enriched cell preparations were analysed by proteomics and the protein pattern was compared to that of MR-1. From the proteomics results, it was hypothesized that the agglutination protein AggA, associated with the secretion of a putative RTX protein, was involved in the hyper-aggregating phenotype. These results were confirmed with a DNA microarray study of COAG versus MR-1. An insertional mutation in the S. oneidensis COAG aggA locus resulted in loss of the hyper-aggregating properties and the increased biofilm-forming capability. The insertional mutation resulted in strongly decreased attachment during the initial stage of biofilm formation. By complementing this mutation with the vector pCM62, expressing the aggA gene, this effect could be nullified and biofilm formation was restored to at least the level of the MR-1 wild-type. C1 Univ Ghent, Lab Microbial Ecol & Technol, B-9000 Ghent, Belgium. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Eurogentec Proteom GmbH, D-14513 Teltow, Germany. VAR Ukkel, B-1180 Brussels, Belgium. RP Verstraete, W (reprint author), Univ Ghent, Lab Microbial Ecol & Technol, Coupure Links 653, B-9000 Ghent, Belgium. EM willy.verstraete@ugent.be RI Boon, Nico/B-4083-2011; Gao, Haichun/A-2160-2014 OI Boon, Nico/0000-0002-7734-3103; NR 37 TC 18 Z9 19 U1 1 U2 10 PU SOC GENERAL MICROBIOLOGY PI READING PA MARLBOROUGH HOUSE, BASINGSTOKE RD, SPENCERS WOODS, READING RG7 1AG, BERKS, ENGLAND SN 1350-0872 J9 MICROBIOL-SGM JI Microbiology-(UK) PD MAR PY 2006 VL 152 BP 721 EP 729 DI 10.1099/mic.0.28204-0 PN 3 PG 9 WC Microbiology SC Microbiology GA 026EY UT WOS:000236321700015 PM 16514152 ER PT J AU Lee, BI Wang, X Kwon, SJ Maie, H Kota, R Hwang, JH Park, JG Hu, M AF Lee, BI Wang, X Kwon, SJ Maie, H Kota, R Hwang, JH Park, JG Hu, M TI Synthesis of high tetragonality nanoparticle BaTiO3 SO MICROELECTRONIC ENGINEERING LA English DT Article DE barium titanate; dielectrics; nanoparticles; tetragonality ID BARIUM-TITANATE POWDERS; HYDROTHERMAL SYNTHESIS; NANOCRYSTALLINE BATIO3; FINE PARTICLES; CRYSTALLIZATION AB New preparation methods for barium titanate powders that can be used for more compact/superior multilayer ceramic capacitors, embedded capacitors, and high capacitance plastic composite materials in microelectronics are described. The methods involve dissolution and precipitation of barium and titanium compounds followed by crystallization at near arribient condition. The particle morphology, tetragonality, and the corresponding dielectric constants are shown to be different for different preparation methods. The mean particle sizes are less than 100 nm and smaller for lower dielectric constant of the solvent medium and higher refluxing temperature. The tetragonality is high for the particles synthesized under totally water-free conditions at 180 degrees C followed by calcination at 600 degrees C. The dielectric constants of particles prepared under water-based ambient conditions were 490 and 900 after dehydroxylation treatment by N-methyl pyrrolidone. (c) 2005 Elsevier B.V. All rights reserved. C1 Clemson Univ, Sch Mat Sci & Engn, Clemson, SC 29634 USA. Korea Inst Sci & Technol, Seoul 130650, South Korea. Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Lee, BI (reprint author), Clemson Univ, Sch Mat Sci & Engn, Olin Hall, Clemson, SC 29634 USA. EM lburtra@clemson.edu OI Hu, Michael/0000-0001-8461-9684; Park, Jae-Gwan/0000-0003-4736-0540 NR 31 TC 13 Z9 13 U1 3 U2 25 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-9317 J9 MICROELECTRON ENG JI Microelectron. Eng. PD MAR PY 2006 VL 83 IS 3 BP 463 EP 470 DI 10.1016/j.mee.2005.10.058 PG 8 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Optics; Physics, Applied SC Engineering; Science & Technology - Other Topics; Optics; Physics GA 026EB UT WOS:000236318700012 ER PT J AU Dupuy, LM Rudd, RE AF Dupuy, LM Rudd, RE TI Surface identification, meshing and analysis during large molecular dynamics simulations SO MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING LA English DT Article ID METALS; GENERATION; NUCLEATION; PLASTICITY; FRACTURE; FAILURE; AREAS AB Techniques are presented for the identification and analysis of surfaces and interfaces in atomistic simulations of solids. Atomistic and other particle-based Simulations have no inherent notion of a surface, only atomic positions and interactions. The algorithms we develop here provide an unambiguous means to determine which atoms constitute the surface, and the list of surface atoms and a tessellation (meshing) of the surface are determined simultaneously. The tessellation is then used to calculate various surface integrals such as volume, area and shape (multiple moment). The principle of surface identification and tessellation is closely related to that used in the generation of the r-reduced surface, a step in the Visualization of molecular surfaces used in biology. The algorithms have been implemented and demonstrated to run automatically (on the fly) in a large-scale parallel molecular dynamics (MD) code on a supercomputer. We demonstrate the validity of the method in three applications in which the Surfaces and interfaces evolve: void surfaces in ductile fracture, the surface morphology due to significant plastic deformation of a nanoscale metal plate, and the interfaces (grain boundaries) and void surfaces in a nanoscale polycrystalline system undergoing ductile failure. The technique is found to be quite robust, even when the topology of the surfaces changes as in the case of void coalescence where two surfaces merge into one. It is found to add negligible computational overhead to an MD code. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Dupuy, LM (reprint author), Lawrence Livermore Natl Lab, L-415, Livermore, CA 94551 USA. EM dupuy2@llnl.gov; robert.rudd@llnl.gov RI Dupuy, Laurent/E-3983-2013; OI Rudd, Robert/0000-0002-6632-2681 NR 44 TC 5 Z9 5 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0965-0393 J9 MODEL SIMUL MATER SC JI Model. Simul. Mater. Sci. Eng. PD MAR PY 2006 VL 14 IS 2 BP 229 EP 251 DI 10.1088/0965-0393/14/2/008 PG 23 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 029XP UT WOS:000236598000008 ER PT J AU Chiang, YJ Nguyen, ML Gurunathan, S Kaminker, P Tessarollo, L Campisi, J Hodes, RJ AF Chiang, YJ Nguyen, ML Gurunathan, S Kaminker, P Tessarollo, L Campisi, J Hodes, RJ TI Generation and characterization of telomere length maintenance in tankyrase 2-deficient mice SO MOLECULAR AND CELLULAR BIOLOGY LA English DT Article ID IN-VIVO; BINDING PROTEIN; REGULATOR TRF1; HUMAN-CELLS; IDENTIFICATION; IRAP; TIN2; DNA; CHROMOSOMES; EXPRESSION AB Telomere length and function are crucial factors that determine the capacity for cell proliferation and survival, mediate cellular senescence, and play a role in malignant transformation in eukaryotic systems. The telomere length of a specific mammalian species is maintained within a given range by the action of telomerase and telomerea-associated proteins. TRF1 is a telomere-associated protein that inhibits telomere elongation by its binding to telomere repeats, preventing access to telomerase. Human TRF1 interacts with tankyrase 1 and tankyrase 2 proteins, two related members of the tankyrase family shown to have poly(ADP-ribose) polymerase activity. Human tankyrase 1 is reported to ADP-ribosylate TRF1 and to down-regulate the telomeric repeat binding activity of TRF1, resulting in telomerase-dependent telomere elongation. Human tankyrase 2 is proposed to have activity similar to that of tankyrase 1, although tankyrase 2 function has been less extensively characterized. In the present study, we have assessed the in vivo function of mouse tankyrase 2 by germ line gene inactivation and show that inactivation of tankyrase 2 does not result in detectable alteration in telomere length when monitored through multiple generations of breeding. This finding suggests that either mouse tankyrases 1 and 2 have redundant functions in telomere length maintenance or that mouse tankyrase 2 differs from human tankyrase 2 in its role in telomere length maintenance. Tankyrase 2 deficiency did result in a significant decrease in body weight sustained through at least the first year of life, most marked in male mice, suggesting that tankyrase 2 functions in potentially telomerase-independent pathways to affect overall development and/or metabolism. C1 NCI, Expt Immunol Branch, NIH, Bethesda, MD 20892 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. NCI, Canc Res Ctr, Mouse Canc Genet Program, Frederick, MD 21702 USA. NIA, NIH, Bethesda, MD 20892 USA. RP Chiang, YJ (reprint author), NCI, Expt Immunol Branch, NIH, Bldg 10,4B36,9000 Rockville Pike, Bethesda, MD 20892 USA. EM chiangj@mail.nih.gov FU Intramural NIH HHS NR 36 TC 35 Z9 35 U1 0 U2 2 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 MAR PY 2006 VL 26 IS 6 BP 2037 EP 2043 DI 10.1128/MCB.26.6.2037-2043.2006 PG 7 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 020NE UT WOS:000235915400003 PM 16507984 ER PT J AU Hsiao, SJ Poitras, MF Cook, BD Liu, Y Smith, S AF Hsiao, SJ Poitras, MF Cook, BD Liu, Y Smith, S TI Tankyrase 2 poly(ADP-ribose) polymerase domain-deleted mice exhibit growth defects but have normal telomere length and capping SO MOLECULAR AND CELLULAR BIOLOGY LA English DT Article ID REGULATED MEMBRANE AMINOPEPTIDASE; EMBRYONIC STEM-CELLS; STERILE ALPHA-MOTIF; TERMINAL TRANSFERASE; MAMMALIAN TELOMERASE; GLUCOSE-HOMEOSTASIS; INSULIN-RECEPTOR; FLOW-CYTOMETRY; BINDING MOTIF; ADAPTER GRB14 AB Regulation of telomere length maintenance and capping are a critical cell functions in both normal and tumor cells. Tankyrase 2 (Tnks2) is a poly(ADP-ribose) polymerase (PARP) that has been shown to modify itself and TRF1, a telomere-binding protein. We show here by overexpression studies that tankyrase 2, like its closely related homolog tankyrase 1, can function as a positive regulator of telomere length in human cells, dependent on its catalytic PAR-P activity. To study the role of Tnks2 in vivo, we generated mice with the Tnks2 PARP domain deleted. These mice are viable and fertile but display a growth retardation phenotype. Telomere analysis by quantitative fluorescence in situ hybridization (FISH), flow-FISH, and restriction fragment analysis showed no change in telomere length or telomere capping in these mice. To determine the requirement for Tnks2 in long-term maintenance of telomeres, we generated embryonic stem cells with the Tnks2 PARP domain deleted and observed no change, even upon prolonged growth, in telomere length or telomere capping. Together, these results suggest that Tnks2 has a role in normal growth and development but is not essential for telomere length maintenance or telomere capping in mice. C1 NYU, Sch Med, Skirball Inst Biomol Med, New York, NY 10016 USA. Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA. RP Smith, S (reprint author), NYU, Sch Med, Skirball Inst Biomol Med, 540 1st Ave,2nd Floor, New York, NY 10016 USA. EM smithsu@saturn.med.nyu.edu OI Smith, Susan/0000-0002-8213-5915 FU NCI NIH HHS [R01 CA095099, R01 CA95099]; NIGMS NIH HHS [GM07238, GM07308, T32 GM007238, T32 GM007308] NR 62 TC 44 Z9 45 U1 0 U2 7 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 MAR PY 2006 VL 26 IS 6 BP 2044 EP 2054 DI 10.1128/MCB.26.6.2044-2054.2006 PG 11 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 020NE UT WOS:000235915400004 PM 16507985 ER PT J AU Mullen, LM Hirschmann, RJ Prince, KL Glenn, TC Dewey, MJ Hoekstra, HE AF Mullen, LM Hirschmann, RJ Prince, KL Glenn, TC Dewey, MJ Hoekstra, HE TI Sixty polymorphic microsatellite markers for the oldfield mouse developed in Peromyscus polionotus and Peromyscus maniculatus SO MOLECULAR ECOLOGY NOTES LA English DT Article DE deer mouse; microsatellites; oldfield mouse; Peromyscus; Rodentia; simple sequence repeats ID POPULATIONS; LOCI; MICE AB We isolated and characterized 60 novel microsatellite markers from the closely related oldfield mouse (Peromyscus polionotus) and deer mouse (Peromyscus maniculatus) for studies of conservation, ecological, quantitative and population genetics. We assessed all 60 markers in a wild population of Peromyscus polionotus rhoadsi (N = 20) from central Florida and found an average of nine alleles per marker and an observed heterozygosity (H-O) of 0.66 (range = 0.00-1.00). These polymorphic markers contribute to the growing number of genomic resources for Peromyscus, an emerging model system for ecological and evolutionary research. C1 Univ Calif San Diego, Div Biol Sci, La Jolla, CA 92093 USA. Univ S Carolina, Peromyscus Genet Stock Ctr, Columbia, SC 29208 USA. Univ S Carolina, Dept Biol Sci, Columbia, SC 29208 USA. Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. RP Hoekstra, HE (reprint author), Univ Calif San Diego, Div Biol Sci, La Jolla, CA 92093 USA. EM hoekstra@ucsd.edu RI Glenn, Travis/A-2390-2008; Hoekstra, Hopi/I-6690-2012 OI Hoekstra, Hopi/0000-0003-1431-1769 NR 21 TC 17 Z9 18 U1 1 U2 14 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 1471-8278 J9 MOL ECOL NOTES JI Mol. Ecol. Notes PD MAR PY 2006 VL 6 IS 1 BP 36 EP 40 DI 10.1111/j.1471-8286.2005.01128.x PG 5 WC Biochemistry & Molecular Biology; Ecology; Evolutionary Biology SC Biochemistry & Molecular Biology; Environmental Sciences & Ecology; Evolutionary Biology GA 017XC UT WOS:000235725600012 ER PT J AU Lin, G Hu, GQ Tsu, C Kunes, YZ Li, HL Dick, L Parsons, T Li, P Chen, ZQ Zwickl, P Weich, N Nathan, C AF Lin, G Hu, GQ Tsu, C Kunes, YZ Li, HL Dick, L Parsons, T Li, P Chen, ZQ Zwickl, P Weich, N Nathan, C TI Mycobacterium tuberculosis prcBA genes encode a gated proteasome with broad oligopeptide specificity SO MOLECULAR MICROBIOLOGY LA English DT Article ID SELF-COMPARTMENTALIZING PROTEASE; 20S PROTEASOME; CORE PARTICLE; RHODOCOCCUS PROTEASOME; 26S PROTEASOME; AXIAL CHANNEL; NITRIC-OXIDE; COMPLEX; DEGRADATION; IDENTIFICATION AB Genes predicted to be associated with the putative proteasome of Mycobacterium tuberculosis (Mtb) play a critical role in defence of the bacillus against nitrosative stress. However, proteasomes are uncommon in eubacteria and it remains to be established whether Mtb's prcBA genes in fact encode a proteasome. We found that coexpression of recombinant PrcB and PrcA in Escherichia coli over a prolonged period at 37 degrees C allowed formation of an alpha(7)beta(7)beta(7)alpha(7), 750 kDa cylindrical stack of four rings in which all 14 beta-subunits were proteolytically processed to expose the active site threonine. In contrast to another Actinomycete, Rhodococcus erythropolis, Mtb's beta-chain propeptide was not required for particle assembly. Peptidolytic activity of the 750 kDa particle towards a hydrophobic oligopeptide was nearly two orders of magnitude less than that of the Rhodococcus 20S proteasome, and unlike eukaryotic and archaeal proteasomes, activity of the Mtb 750 kDa particle could not be stimulated by SDS, Mg2+ or Ca2+. Electron microscopy revealed what appeared to be obstructed alpha-rings in the Mtb 750 kDa particle. Deletion of the N-terminal octapeptide from Mtb's alpha-chain led to disappearance of the apparent obstruction and a marked increase of peptidolytic activity. Unlike proteasomes isolated from other Actinomycetes, the open-gate Mtb mutant 750 kDa particle cleaved oligopeptides not only after hydrophobic residues but also after basic, acidic and small, neutral amino acids. Thus, Mtb encodes a broadly active, gated proteasome that may work in concert with an endogenous activator. C1 Cornell Univ, Weill Med Coll, Dept Microbiol & Immunol, New York, NY 10021 USA. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. Millennium Pharmaceut, Cambridge, MA 02139 USA. Max Planck Inst Biochem, D-82152 Martinsried, Germany. RP Nathan, C (reprint author), Cornell Univ, Weill Med Coll, Dept Microbiol & Immunol, 1300 York Ave, New York, NY 10021 USA. EM cnathan@med.cornell.edu FU NIAID NIH HHS [P01 AI56293, R01 AI070285] NR 48 TC 56 Z9 65 U1 0 U2 4 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0950-382X J9 MOL MICROBIOL JI Mol. Microbiol. PD MAR PY 2006 VL 59 IS 5 BP 1405 EP 1416 DI 10.1111/j.1365-2958.2005.05035.x PG 12 WC Biochemistry & Molecular Biology; Microbiology SC Biochemistry & Molecular Biology; Microbiology GA 010TG UT WOS:000235220200005 PM 16468985 ER PT J AU Hu, GQ Lin, G Wang, M Dick, L Xu, RM Nathan, C Li, HL AF Hu, GQ Lin, G Wang, M Dick, L Xu, RM Nathan, C Li, HL TI Structure of the Mycobacterium tuberculosis proteasome and mechanism of inhibition by a peptidyl boronate SO MOLECULAR MICROBIOLOGY LA English DT Article ID 20S PROTEASOME; ANTIGEN PRESENTATION; CRYSTAL-STRUCTURE; CORE PARTICLE; RESOLUTION; PROTEOLYSIS; SYSTEM; MATURATION; ACTIVATOR; SOFTWARE AB Mycobacterium tuberculosis (Mtb) has the remarkable ability to resist killing by human macrophages. The 750 kDa proteasome, not available in most eubacteria except Actinomycetes, appears to contribute to Mtb's resistance. The crystal structure of the Mtb proteasome at 3.0 angstrom resolution reveals a substrate-binding pocket with composite features of the distinct beta 1, beta 2 and beta 5 substrate binding sites of eukaryotic proteasomes, accounting for the broad specificity of the Mtb proteasome towards oligopeptides described in the companion article [Lin et al. (2006), Mol Microbiol doi:10.1111/j.1365-2958.2005.05035.x]. The substrate entrance at the end of the cylindrical proteasome appears open in the crystal structure due to partial disorder of the alpha-subunit N-terminal residues. However, cryo-electron microscopy of the core particle reveals a closed end, compatible with the density observed in negative-staining electron microscopy that depended on the presence of the N-terminal octapetides of the alpha-subunits in the companion article, suggesting that the Mtb proteasome has a gated structure. We determine for the first time the proteasomal inhibition mechanism of the dipeptidyl boronate N-(4-morpholine)carbonyl-beta-(1-naphthyl)-L-alanine- L-leucine boronic acid (MLN-273), an analogue of the antimyeloma drug bortezomib. The structure improves prospects for designing Mtb-specific proteasomal inhibitors as a novel approach to chemotherapy of tuberculosis. C1 Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. Cornell Univ, Weill Med Coll, Dept Microbiol & Immunol, New York, NY 10021 USA. Cold Spring Harbor Lab, Cold Spring Harbor, NY 11724 USA. Millennium Pharmaceut, Cambridge, MA 02139 USA. RP Li, HL (reprint author), Brookhaven Natl Lab, Dept Biol, 50 Bell Ave, Upton, NY 11973 USA. EM hli@bnl.gov FU NIAID NIH HHS [P01 AI56293, R01 AI070285] NR 42 TC 75 Z9 86 U1 1 U2 9 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0950-382X J9 MOL MICROBIOL JI Mol. Microbiol. PD MAR PY 2006 VL 59 IS 5 BP 1417 EP 1428 DI 10.1111/j.1365-2958.2005.05036.x PG 12 WC Biochemistry & Molecular Biology; Microbiology SC Biochemistry & Molecular Biology; Microbiology GA 010TG UT WOS:000235220200006 PM 16468986 ER PT J AU Sabo, D Rempe, SB Greathouse, JA Martin, MG AF Sabo, D. Rempe, S. B. Greathouse, J. A. Martin, M. G. TI Molecular studies of the structural properties of hydrogen gas in bulk water SO MOLECULAR SIMULATION LA English DT Article; Proceedings Paper CT Annual Meeting of the American-Institute-for-Chemical-Engineers (AIChE) CY OCT 30-NOV 04, 2005 CL Cincinnati, OH SP AIChE DE hydrophobic hydration; hydrogen; clathrate hydrate; coordination number ID CLATHRATE HYDRATE; DYNAMICS; MODEL; PSEUDOPOTENTIALS; POTENTIALS; DEPENDENCE; CLUSTERS; BEHAVIOR; STORAGE AB We report on our studies of the structural properties of a hydrogen molecule dissolved in liquid water. The radial distribution function, coordination number and coordination number distribution are calculated using different representations of the interatomic forces within molecular dynamics (MD), Monte Carlo (MC) and ab initio molecular dynamics (AIMD) simulation frameworks. Although structural details differ in the radial distribution functions generated from the different force fields, all approaches agree that the average and most probable number of water molecules occupying the inner hydration sphere around hydrogen is 16. Furthermore, all results exclude the possibility of clathrate-like organization of water molecules around the hydrophobic molecular hydrogen solute. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sabo, D (reprint author), Sandia Natl Labs, MS 1413 & 0310, Albuquerque, NM 87185 USA. EM dsabo@sandia.gov; slrempe@sandia.gov RI Rempe, Susan/H-1979-2011 NR 46 TC 14 Z9 14 U1 0 U2 5 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0892-7022 J9 MOL SIMULAT JI Mol. Simul. PD MAR-APR PY 2006 VL 32 IS 3-4 BP 269 EP 278 DI 10.1080/08927020600728621 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 058GI UT WOS:000238653100011 ER PT J AU Schaller, RD Sykora, M Pietryga, JM Klimov, VI AF Schaller, RD Sykora, M Pietryga, JM Klimov, VI TI Seven excitons at a cost of one: Redefining the limits for conversion efficiency of photons into charge carriers SO NANO LETTERS LA English DT Article ID ELECTRON-TRANSFER DYNAMICS; QUANTUM DOTS; SOLAR-CELLS; COLLOIDAL PBSE; MULTIPLICATION; NANOCRYSTALS AB The performance of photovoltaic and photochemical devices is directly linked to the efficiency with which absorbed photons are converted into electron-hole pairs (excitons). A usual assumption is that one photon produces a single exciton, while the photon energy in the excess of the material's energy gap (the gap that separates the conduction from the valence band) is wasted as heat. Here we experimentally demonstrate that using semiconductor nanocrystals we can reduce this energy loss to a nearly absolute minimum allowed by energy conservation by producing multiple excitons per single photon. Specifically, we generate seven excitons from a photon with an energy of 7.8 energy gaps, which corresponds to only similar to 10% energy loss, while in the normal scenario (one photon produces one exciton) similar to 90% of the photon energy would be dissipated as heat. Such large yields of charge carriers (photon-to-exciton conversion efficiency up to 700%) has the potential to dramatically increase the performance of photovoltaic cells and can greatly advance solar fuel producing technologies. C1 Los Alamos Natl Lab, Div Chem, CPCS, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Chem, CPCS, Los Alamos, NM 87545 USA. EM klimov@lanl.gov OI Klimov, Victor/0000-0003-1158-3179 NR 21 TC 352 Z9 363 U1 8 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 MAR PY 2006 VL 6 IS 3 BP 424 EP 429 DI 10.1021/nl052276g 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 022IV UT WOS:000236049800017 PM 16522035 ER PT J AU Huang, JX Tao, AR Connor, S He, RR Yang, PD AF Huang, JX Tao, AR Connor, S He, RR Yang, PD TI A general method for assembling single colloidal particle lines SO NANO LETTERS LA English DT Article ID QUANTUM-DOT MONOLAYERS; NANOPARTICLES; TRANSPORT; PATTERNS; GOLD AB We have developed a general method for assembling colloidal particles into one-dimensional lines of single particle thickness. Well-spaced, parallel single particle lines can be readily deposited on a substrate from a dilute Langmuir-Blodgett particle monolayer via a stick-slip motion of the water-substrate contact line. The particle density within the lines is controllable by the particle concentration in the monolayer as well as the pulling speed of the substrate. Lines of a great variety of materials and sizes, ranging from a few nanometers to a few micrometers, have been demonstrated. Multiple depositions create complex patterns such as cross lines, even of different particles. The ability of placing nanoparticles into one-dimensional arrays enables the construction of higher hierarchical device structures. For example, using gold nanoparticle seeds, vertical single nanowire arrays of silicon can be grown replicating the pattern of single particle lines. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Yang, PD (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM p_yang@berkeley.edu RI Huang, Jiaxing/B-7521-2009; Huang, Jiaxing/A-9417-2012 NR 27 TC 150 Z9 150 U1 7 U2 65 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1530-6984 J9 NANO LETT JI Nano Lett. PD MAR PY 2006 VL 6 IS 3 BP 524 EP 529 DI 10.1021/nl060235u 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 022IV UT WOS:000236049800038 PM 16522056 ER PT J AU Vo-Dinh, T Kasili, P Wabuyele, M AF Vo-Dinh, Tuan Kasili, Paul Wabuyele, Musundi TI Nanoprobes and nanobiosensors for monitoring and imaging individual living cells SO NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE LA English DT Article AB This article presents an overview of nanobiosensors and nanoprobes. The fabrication, operating principle, and applications of these systems and their capacity for in vivo analysis and optical imaging at the single-cell level are discussed. Recently the cross-disciplinary integration of nanotechnology, biology, and photonics has been revolutionizing important areas in molecular biology, especially diagnostics and therapy at the molecular and cellular levels. Nanobiosensors and nanoprobes are a relatively new class of biosensing and imaging devices that allow for analytical measurements in individual living cells. These devices have the capacity to sense individual chemical species in specific locations within a cell. This article discusses the usefulness and potential of these nanotechnology-based systems in biological research and their applications to monitoring individual living cells. (c) 2006 Published by Elsevier Inc. C1 Oak Ridge Natl Lab, Ctr Adv Biomed Photon, Adv Biomed Sci & Technol Grp, Div Life Sci, Oak Ridge, TN 37831 USA. RP Vo-Dinh, T (reprint author), Oak Ridge Natl Lab, Ctr Adv Biomed Photon, Adv Biomed Sci & Technol Grp, Div Life Sci, POB 2008, Oak Ridge, TN 37831 USA. EM vodinht@ornl.gov NR 37 TC 59 Z9 59 U1 2 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1549-9634 EI 1549-9642 J9 NANOMED-NANOTECHNOL JI Nanomed.-Nanotechnol. Biol. Med. PD MAR PY 2006 VL 2 IS 1 BP 22 EP 30 DI 10.1016/j.nano.2005.10.012 PG 9 WC Nanoscience & Nanotechnology; Medicine, Research & Experimental SC Science & Technology - Other Topics; Research & Experimental Medicine GA 067XZ UT WOS:000239337200003 PM 17292112 ER PT J AU Kline, RJ Mcgehee, MD Toney, MF AF Kline, RJ Mcgehee, MD Toney, MF TI Highly oriented crystals at the buried interface in polythiophene thin-film transistors SO NATURE MATERIALS LA English DT Article ID FIELD-EFFECT TRANSISTORS; X-RAY-SCATTERING; MOLECULAR-WEIGHT; EFFECT MOBILITY; REGIOREGULAR POLYTHIOPHENE; CONJUGATED POLYMERS; ENHANCEMENT; COPOLYMERS; DEPENDENCE; ALIGNMENT AB Thin films of polymer semiconductors are being intensively investigated for large-area electronics applications such as light-emitting diodes, photovoltaic cells and thin-film transistors. Understanding the relationship between film morphology and charge transport is key to improving the performance of thin-film transistors. Here we use X-ray diffraction rocking curves to provide direct evidence for highly oriented crystals at the critical buried interface between the polymer and the dielectric where the current flows in thin-film transistors. Treating the substrate surface with self-assembled monolayers significantly varies the concentration of these crystals. We show that the polymer morphology at the buried interface can be different from that in the bulk of the thin films, and provide insight into the processes that limit charge transport in polythiophene films. These results are used to build a more complete model of the relationship between chain packing in polymer thin-films and charge transport. C1 Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA. Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. RP Mcgehee, MD (reprint author), Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA. EM mmcgehee@stanford.edu RI Kline, Regis/B-8557-2008 NR 36 TC 536 Z9 542 U1 8 U2 132 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 MAR PY 2006 VL 5 IS 3 BP 222 EP 228 DI 10.1038/nmat1590 PG 7 WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 017QK UT WOS:000235707900022 ER PT J AU Ozer, MM Thompson, JR Weitering, HH AF Ozer, MM Thompson, JR Weitering, HH TI Hard superconductivity of a soft metal in the quantum regime SO NATURE PHYSICS LA English DT Article ID THIN-FILMS; FLUX-CREEP; SUSCEPTIBILITY; NANOWIRES; LIMIT; DISKS; FIELD C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Thompson, JR (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. EM jrt@utk.edu; hanno@utk.edu NR 29 TC 116 Z9 117 U1 6 U2 23 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 1745-2473 J9 NAT PHYS JI Nat. Phys. PD MAR PY 2006 VL 2 IS 3 BP 173 EP 176 DI 10.1038/nphys244 PG 4 WC Physics, Multidisciplinary SC Physics GA 023LM UT WOS:000236128200019 ER PT J AU Scannapieco, E Ferrara, A Heger, A Madau, P Schneider, R Woosley, S AF Scannapieco, E Ferrara, A Heger, A Madau, P Schneider, R Woosley, S TI Detecting primordial stars SO NEW ASTRONOMY REVIEWS LA English DT Article; Proceedings Paper CT First Light and Reionization - Theoretical Study and Experimental Detection of First Luminous Sources in the Universe CY MAY 18-21, 2005 CL Irvine, CA DE cosmology; theory; galaxy formation; supernovae ID POPULATION III STARS; WOLF-RAYET STARS; 1ST STARS; INTERGALACTIC MEDIUM; EVOLUTION; METALS; MASS; FRAGMENTATION; SUPERNOVAE; UNIVERSE AB We study the detectability of primordial metal-free stars, both through direct searches for their emission, as well as searches for the resulting supernovae. We show that enrichment is a local process that takes place over an extended redshift range. While the duration of the transition from a metal-free to an enriched universe depends on several unknown factors, in all models late-forming metal-free stars are found in 10(7.5)-10(8.0) M-circle dot objects, which are just large enough to cool, but small enough to not be clustered near areas of previous star formation. We discuss the observational properties of these objects, some of which may have already been detected in ongoing surveys of high-redshift Lyman-alpha emitters. If metal-free stars have masses 140M(circle dot) less than or similar to M-* less than or similar to 260M(circle dot), they are expected to end their lives as pair-production supernovae (PPSNe), in which an electron-positron pair-production instability triggers explosive nuclear burning. Using the implicit hydrodynamics code KEPLER, we calculate a set of PPSNe light curves that allows us to assess observational strategies for finding these objects. The peak luminosities of typical PPSNe are only slightly greater than those of Type Ia supernovac, but they remain bright much longer (similar to 1 year) and have hydrogen lines. Ongoing supernova searches may soon be able to place stringent limits on the fraction of very massive stars out to z approximate to 2. The planned Joint Dark Energy Mission satellite will be able to extend these limits out to z approximate to 6. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA. SISSA, Int Sch Adv Studies, I-34014 Trieste, Italy. Los Alamos Natl Lab, Theoret Astrophys Grp, Los Alamos, NM 87545 USA. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. Osserv Astrofis Arcetri, I-50125 Florence, Italy. RP Scannapieco, E (reprint author), Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA. EM evan@kitp.ucsb.edu RI Ferrara, Andrea/A-4357-2011; Schneider, Raffaella/E-4216-2017 OI Schneider, Raffaella/0000-0001-9317-2888 NR 36 TC 2 Z9 2 U1 1 U2 1 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 1387-6473 J9 NEW ASTRON REV JI New Astron. Rev. PD MAR PY 2006 VL 50 IS 1-3 BP 89 EP 93 DI 10.1016/j.newar.2005.11.009 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 018ET UT WOS:000235747500015 ER PT J AU Helmer, RG AF Helmer, RG TI Nuclear data sheets for A=153 SO NUCLEAR DATA SHEETS LA English DT Review ID HIGH-SPIN STATES; NEUTRON-DEFICIENT ISOTOPES; RARE-EARTH REGION; ODD-MASS NUCLEI; FISSION-PRODUCT NUCLIDES; NEGATIVE-PARITY STATES; HALF-LIFE MEASUREMENTS; PARTICLE-ROTOR MODEL; GAMMA-RAY SPECTRA; INTRINSIC REFLECTION ASYMMETRY AB The experimental results from the various reaction and decay studies leading to nuclides in the A=153 mass chain have been reviewed. These data are summarized and presented, together with adopted level schemes and properties. This evaluation replaces that of Nuclear Data Sheets 83 (1998) 285 (1998He06). C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Helmer, RG (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. NR 477 TC 18 Z9 18 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0090-3752 EI 1095-9904 J9 NUCL DATA SHEETS JI Nucl. Data Sheets PD MAR PY 2006 VL 107 IS 3 BP 507 EP + DI 10.1016/j.nds.2006.02.001 PG 281 WC Physics, Nuclear SC Physics GA 022PD UT WOS:000236067100001 ER PT J AU Ball, S AF Ball, S TI Sensitivity studies of modular high-temperature gas-cooled reactor postulated accidents SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT 2nd International Topical Meeting on High Temperature Reactor Technology (HTR-2004) CY SEP 22-24, 2004 CL Beijing, PEOPLES R CHINA AB The results of various accident scenario simulations for the two major modular high temperature gas-cooled reactor (HTGR) variants (prismatic and pebble bed cores) are presented. Sensitivity studies can help to quantify the uncertainty ranges of the predicted outcomes for variations in some of the more crucial system parameters, as well as for occurrences of equipment and/or operator failures or errors. In addition, sensitivity studies can guide further efforts in improving the design and determining where more (or less) R&D is appropriate. Both of the modular HTGR designs studied - the 400-MW(t) pebble bed modular reactor (PBMR, pebble) and the 600-MW(t) gas-turbine modular helium reactor (GT-MHR, prismatic) - show excellent accident prevention and mitigation capabilities because of their inherent passive safety features. The large thermal margins between operating and "potential damage" temperatures, along with the typically very slow accident response times (approximate days to reach peak temperatures), tend to reduce concerns about uncertainties in the simulation models, the initiating events, and the equipment and operator responses. (c) 2006 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. RP Ball, S (reprint author), Oak Ridge Natl Lab, Nucl Sci & Technol Div, POB 2008, Oak Ridge, TN 37831 USA. EM sjb@ornl.gov NR 8 TC 5 Z9 5 U1 0 U2 5 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 MAR PY 2006 VL 236 IS 5-6 BP 454 EP 462 DI 10.1016/j.nucengdes.2005.10.029 PG 9 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 033ZV UT WOS:000236894500003 ER PT J AU Ougouag, AM Kloosterman, JL van Rooijen, WFG Gougar, HD Terry, WK AF Ougouag, AM Kloosterman, JL van Rooijen, WFG Gougar, HD Terry, WK TI Investigation of bounds on particle packing in pebble-bed high temperature reactors SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT 2nd International Topical Meeting on High Temperature Reactor Technology (HTR-2004) CY SEP 22-24, 2004 CL Beijing, PEOPLES R CHINA ID FUEL AB Models and methods are presented for determining practical limits of the packing density of TRISO particles in fuel pebbles for a pebble-bed reactor (PBR). These models are devised for designing and interpreting fuel testing experiments. Two processes for particle failure are accounted for: failure of touching particles at the pressing stage in the pebble manufacturing process and failure due to inner pressure buildup during irradiation. The second process gains importance with increasing fuel temperature, which limits the particle packing density and the corresponding fuel enrichment. Suggestions for improvements to the models are presented. (c) 2006 Elsevier B.V. All rights reserved. C1 Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. Delft Univ Technol, Fac Sci Appl, NL-2629 JB Delft, Netherlands. RP Ougouag, AM (reprint author), Idaho Natl Engn Lab, POB 1625, Idaho Falls, ID 83415 USA. EM Abderrafi.Ougouag@inl.gov; J.L.Kloosterman@tudelft.nl RI Ougouag, Abderrafi/A-9499-2009 OI Ougouag, Abderrafi/0000-0003-4436-380X NR 13 TC 6 Z9 6 U1 0 U2 0 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 MAR PY 2006 VL 236 IS 5-6 BP 669 EP 676 DI 10.1016/j.nucengdes.2005.12.006 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 033ZV UT WOS:000236894500024 ER PT J AU Gates, DA Kessel, C Menard, J Taylor, G Wilson, JR Bell, MG Bell, RE Bernabei, S Bialek, J Biewer, T Blanchard, W Boedo, J Bush, C Carter, MD Choe, W Crocker, N Darrow, DS Davis, W Delgado-Aparicio, L Diem, S Ferron, J Field, A Foley, J Fredrickson, ED Gibney, T Harvey, R Hatcher, RE Heidbrink, W Hill, K Hosea, JC Jarboe, TR Johnson, DW Kaita, R Kaye, S Kubota, S Kugel, HW Lawson, J LeBlanc, BP Lee, KC Levinton, F Maingi, R Manickam, J Maqueda, R Marsala, R Mastrovito, D Mau, TK Medley, SS Meyer, H Mikkelsen, DR Mueller, D Munsat, T Nelson, BA Neumeyer, C Nishino, N Ono, M Park, H Park, W Paul, S Peebles, T Peng, M Phillips, C Pigarov, A Pinsker, R Ram, A Ramakrishnan, S Raman, R Rasmussen, D Redi, M Rensink, M Rewoldt, G Robinson, J Roney, P Roquemore, L Ruskov, E Ryan, P Sabbagh, SA Schneider, H Skinner, CH Smith, DR Sontag, A Soukhanovskii, V Stevenson, T Stotler, D Stratton, B Stutman, D Swain, D Synakowski, E Takase, Y Tritz, K von Halle, A Wade, M White, R Wilgen, J Williams, M Zhu, W Zweben, SJ Akers, R Beiersdorfer, P Betti, R Bigelow, T AF Gates, DA Kessel, C Menard, J Taylor, G Wilson, JR Bell, MG Bell, RE Bernabei, S Bialek, J Biewer, T Blanchard, W Boedo, J Bush, C Carter, MD Choe, W Crocker, N Darrow, DS Davis, W Delgado-Aparicio, L Diem, S Ferron, J Field, A Foley, J Fredrickson, ED Gibney, T Harvey, R Hatcher, RE Heidbrink, W Hill, K Hosea, JC Jarboe, TR Johnson, DW Kaita, R Kaye, S Kubota, S Kugel, HW Lawson, J LeBlanc, BP Lee, KC Levinton, F Maingi, R Manickam, J Maqueda, R Marsala, R Mastrovito, D Mau, TK Medley, SS Meyer, H Mikkelsen, DR Mueller, D Munsat, T Nelson, BA Neumeyer, C Nishino, N Ono, M Park, H Park, W Paul, S Peebles, T Peng, M Phillips, C Pigarov, A Pinsker, R Ram, A Ramakrishnan, S Raman, R Rasmussen, D Redi, M Rensink, M Rewoldt, G Robinson, J Roney, P Roquemore, L Ruskov, E Ryan, P Sabbagh, SA Schneider, H Skinner, CH Smith, DR Sontag, A Soukhanovskii, V Stevenson, T Stotler, D Stratton, B Stutman, D Swain, D Synakowski, E Takase, Y Tritz, K von Halle, A Wade, M White, R Wilgen, J Williams, M Zhu, W Zweben, SJ Akers, R Beiersdorfer, P Betti, R Bigelow, T TI Progress towards steady state on NSTX SO NUCLEAR FUSION LA English DT Article; Proceedings Paper CT 4th IAEA Technical Meeting on Steady State Operation of Magnetic Fusion Devices and MHD of Advanced Scenarios CY FEB 01-05, 2005 CL Ahmedabad, INDIA SP IAEA ID SPHERICAL-TORUS-EXPERIMENT; ELECTRON BERNSTEIN WAVES; HARMONIC FAST-WAVE; HIGH-BETA; PLASMAS; EXPLORATION; TRANSPORT; TOKAMAKS; MODE AB In order to reduce recirculating power fraction to acceptable levels, the spherical torus concept relies on the simultaneous achievement of high toroidal beta and high bootstrap fraction in steady state. In the last year, as a result of plasma control system improvements, the achievable plasma elongation on NSTX has been raised from kappa similar to 2.1 to kappa similar to 2.6-approximately a 25% increase. This increase in elongation has led to a substantial increase in the toroidal beta for long pulse discharges. The increase in beta associated with an increase in plasma current at nearly fixed poloidal beta, which enables higher beta(1), with nearly constant bootstrap fraction. As a result, for the first time in a spherical torus, a discharge with a plasma current of I MA has been sustained for 1 s (0.8 s current flat-top). Data are presented from NSTX correlating the increase in performance with increased plasma shaping capability. In addition to improved shaping, H-modes induced during the current ramp phase of the plasma discharge have been used to reduce flux consumption and to delay the onset of MHD instabilities. Based on these results, a modelled integrated scenario, which has 100% non-inductive current drive with very high toroidal, will also be discussed. The NSTX poloidal field coils are currently being modified to produce the plasma shape which is required for this scenario, which requires high triangularity (delta similar to 0.8) at elevated elongation (kappa similar to 2.5). The other main requirement of steady state on NSTX is the ability to drive a fraction of the total plasma current with RF waves. The results of high harmonic fast wave heating and current drive studies as well as electron Bernstein wave emission studies will be presented. C1 Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Columbia Univ, Dept Appl Phys, New York, NY 10027 USA. Univ Calif San Diego, San Diego, CA 92103 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Korea Adv Inst Sci & Technol, Taejon 305701, South Korea. Univ Calif Los Angeles, Los Angeles, CA USA. Johns Hopkins Univ, Baltimore, MD USA. Gen Atom Co, San Diego, CA USA. UKAEA Euratom Fus Assoc, Abingdon, Oxon, England. CompX, Del Mar, CA USA. Univ Calif Irvine, Irvine, CA USA. Univ Washington, Seattle, WA 98195 USA. Univ Calif Davis, Davis, CA 95616 USA. Nova Photon, Princeton, NJ USA. Univ Colorado, Boulder, CO 80309 USA. Hiroshima Univ, Hiroshima, Japan. MIT, Cambridge, MA 02139 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. Univ Tokyo, Tokyo, Japan. Univ Rochester, Rochester, NY USA. RP Gates, DA (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. RI Sabbagh, Steven/C-7142-2011; Nishino, Nobuhiro/D-6390-2011; Choe, Wonho/C-1556-2011; Stotler, Daren/J-9494-2015; Stutman, Dan/P-4048-2015; OI Stotler, Daren/0000-0001-5521-8718; Davis, William/0000-0003-0666-7247; Menard, Jonathan/0000-0003-1292-3286 NR 18 TC 14 Z9 14 U1 0 U2 5 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD MAR PY 2006 VL 46 IS 3 BP S22 EP S28 DI 10.1088/0029-5515/46/3/S04 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 031CP UT WOS:000236682000005 ER PT J AU Berg, JS AF Berg, JS TI Computational needs for muon accelerators SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE muon accelerators; beam dynamics; simulation; target ID FLOWS AB Muon accelerators contain beam lines and components which are unlike any found in existing accelerators. Production of the muons requires targets for beams with powers which are at or beyond what has currently been achieved. Many subsystems use solenoid focusing systems where at any given point, several magnets have a significant influence. The beams that are transported can have energy spreads of +/- 30% or more. The required emittances necessitate accurate tracking of particles with angles of tenth of a radian and which are positioned almost at the edge of the beam pipe. Tracking must be done not only in vacuum, but also in materials; therefore, statistical fluctuations must also be included. Design and simulation of muon accelerators requires software which can: accurately simulate the dynamics of solid and liquid targets under proton bombardment; predict the production of particles from these targets; accurately compute magnetic fields based on either a real magnet design or a model which includes end fields; and accurately design and simulate a beam line where the transported beam satisfies the above specifications and the beam line contains non-standard, overlapping elements. The requirements for computational tools will be discussed, the capabilities of existing tools will be described and compared to what is required. (c) 2005 Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Berg, JS (reprint author), Brookhaven Natl Lab, Bldg 901A,POB 5000, Upton, NY 11973 USA. EM jsberg@bnl.gov RI Berg, Joseph/E-8371-2014 OI Berg, Joseph/0000-0002-5955-6973 NR 28 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 20 EP 24 DI 10.1016/j.nima.2005.11.054 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200004 ER PT J AU Ostroumov, PN Nolen, JA Mustapha, B AF Ostroumov, PN Nolen, JA Mustapha, B TI Computational needs for the RIA accelerator systems SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE RIA simulations; beam dynamics; stripper modeling; target simulations; fragment separators ID HEAVY-IONS; CHARGE STATES; ISOL TARGETS; HIGH-ENERGY; SIMULATIONS; EFFUSION; PROGRAM; FOILS; MODEL; GAS AB This paper discusses the computational needs for the full design and simulation of the RIA accelerator systems. Beam dynamics simulations are essential to first define and optimize the architectural design for both the driver linac and the post-accelerator. They are also important to study different design options and various off-normal modes in order to decide on the most-performing and cost-effective design. Due to the high-intensity primary beams, the beam-stripper interaction is a source of both radioactivation and beam contamination and should be carefully investigated and simulated for proper beam collimation and shielding. The targets and fragment separators area needs also very special attention in order to reduce any radiological hazards by careful shielding design. For all these simulations parallel computing is an absolute necessity. (c) 2005 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Ostroumov, PN (reprint author), Argonne Natl Lab, Div Phys, 9700 S Cass Ave, Argonne, IL 60439 USA. EM ostroumov@phy.anl.gov NR 40 TC 4 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 25 EP 31 DI 10.1016/j.nima.2005.11.034 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200005 ER PT J AU Chang, P Lee, SY Yan, YT AF Chang, P Lee, SY Yan, YT TI A differential algebraic integration algorithm for symplectic mappings in systems with three-dimensional magnetic field SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE differential algebras; symplectic integration; particle tracking; transfer maps AB A differential algebraic integration algorithm is developed for symplectic mapping through a three-dimensional (3-D) magnetic field. The self-consistent reference orbit in phase space is obtained by making a canonical transformation to eliminate the linear part of the Hamiltonian. Transfer maps from the entrance to the exit of any 3-D magnetic field are then obtained through slice-by-slice symplectic integration. The particle phase-space coordinates are advanced by using the integrable polynomial procedure. This algorithm is a powerful tool to attain nonlinear maps for insertion devices in synchrotron light source or complicated magnetic field in the interaction region in high energy colliders. (c) 2005 Elsevier B.V. All rights reserved. C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Natl Synchrotron Radiat Res Ctr, Hsinchu 33077, Taiwan. Indiana Univ, Dept Phys, Bloomington, IN 47405 USA. RP Yan, YT (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM yan@slac.stanford.edu NR 4 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 66 EP 68 DI 10.1016/j.nima.2005.11.016 PG 3 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200015 ER PT J AU Warnock, R Bassi, G Ellison, JA AF Warnock, R Bassi, G Ellison, JA TI Vlasov treatment of coherent synchrotron radiation from arbitrary planar orbits SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE CSR; coherent synchrotron; bunch compressor; Vlasov equation AB We study the influence of coherent synchrotron radiation (CSR) on particle bunches traveling on arbitrary planar orbits between parallel conducting plates which represent the vacuum chamber. Our goal is to follow the time evolution of the phase space distribution by solving the Viasov-Maxwell equations in the time domain. This should provide simulations with lower numerical noise than the macro-particle method, and allow one to study such issues as emittance degradation and microbunching due to CSR in bunch compressors. The fields excited by the bunch are computed in the laboratory frame from a new formula that leads to much simpler computations than usual methods. The nonlinear Vlasov equation, formulated in the interaction picture, is integrated in the beam frame by approximating the Perron-Frobenius operator. For application to a chicane bunch compressor we take steps to deal with energy chirp. (c) 2005 Elsevier B.V. All rights reserved. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Univ New Mexico, Dept Math, Albuquerque, NM 87131 USA. RP Warnock, R (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM warnock@slac.stanford.edu; gbassi@math.unm.edu; ellison@math.unm.edu NR 7 TC 9 Z9 9 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 85 EP 89 DI 10.1016/j.nima.2005.11.070 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200019 ER PT J AU Poklonskiy, AA Neuffer, D Johnstone, CJ Berz, M Makino, K Ovsyannikov, DA Ovsyannikov, AD AF Poklonskiy, AA Neuffer, D Johnstone, CJ Berz, M Makino, K Ovsyannikov, DA Ovsyannikov, AD TI Optimizing the adiabatic buncher and phase-energy rotator for neutrino factories SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE neutrino factory; buncher; phase rotator; map methods AB In the US scenario for a Neutrino Factory presented in "A feasibility study of a neutrino source based on a muon storage ring", N. Holtkamp (Ed.), D. Finley (Ed.), Fermilab, April 15th, 2000), a large percentage of the cost is related to an induction linac for phase-energy rotation and bunching of the muon beam collected after the production target and decay channel. A more cost-effective adiabatic buncher and phase-energy rotator has been proposed to replace the induction linac system (D. Neuffer, A. Van Ginneken, High-frequency bunching and (phi - delta E) rotation for a muon source, Proceedings of the 2001 Particle Accelerators Conference, Chicago, 2001, p. 2029). The new method uses consecutive RF cavities with differing frequencies. The frequencies are changed to enable bunching and phase-energy rotation. In this paper, the theoretical concept is developed and demonstrated with simulation results obtained with the map code COSY Infinity (http://cosy.pa.msu.edu). An optimization strategy is also explored. (c) 2005 Elsevier B.V. All rights reserved. C1 Fermilab Natl Accelerator Lab, MS221, Batavia, IL 60510 USA. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. St Petersburg State Univ, Fac Math & Control Proc, St Petersburg 198504, Russia. RP Poklonskiy, AA (reprint author), Fermilab Natl Accelerator Lab, MS221, POB 500, Batavia, IL 60510 USA. EM poklonsk@fnal.gov; neuffer@fnal.gov; cjj@fnal.gov; berz@msu.edu; makino@msu.edu; dovs@apmath.spbu.ru; ovs@apmath.spbu.ru RI Ovsyannikov, Dmitri/H-8715-2013; Ovsyannikov, Alexander/K-7123-2013 OI Ovsyannikov, Dmitri/0000-0002-0829-2023; Ovsyannikov, Alexander/0000-0002-2467-6529 NR 10 TC 2 Z9 2 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 135 EP 141 DI 10.1016/j.nima.2005.11.038 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200029 ER PT J AU Snopok, P Johnstone, C Berz, M Ovsyannikov, DA Ovsyannikovc, AD AF Snopok, P Johnstone, C Berz, M Ovsyannikov, DA Ovsyannikovc, AD TI Study and optimal correction of a systematic skew quadrupole field in the Tevatron SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE tevatron; optimization; dipole error; skew quadrupole correction; COSYINFINITY; tracking; transfer map AB Increasing demands for luminosity in existing and future colliders have made lattice design and error tolerance and correction critical to achieving performance goals. The current state of the Tevatron collider is an example, with a strong skew quadrupole error present in the operational lattice. This work studies the high-order performance of the Tevatron and the strong nonlinear behavior introduced when a significant skew quadrupole error is combined with conventional sextupole correction, a behavior still clearly evident after optimal tuning of available skew quadrupole circuits. An optimization study is performed using different skew quadrupole families, and, importantly, local and global correction of the linear skew terms in maps generated by the code COSY INFINITY [M. Berz, COSY INFINITY version 8.1 user's guide and reference manual, Department of Physics and Astronomy MSUHEP-20704, Michigan State University (2002). URL http://cosy.pa.msu.edu/cosymanu/index.html]. Two correction schemes with one family locally correcting each arc and eight independent correctors in the straight sections for global correction are proposed and shown to dramatically improve linearity and performance of the baseline Tevatron lattice. Published by Elsevier B.V. C1 Fermilab Astrophys Ctr, MS 221, Batavia, IL 60510 USA. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Dept Appl Math & Control Proc, St Petersburg 198504, Russia. RP Snopok, P (reprint author), Fermilab Astrophys Ctr, MS 221, POB 500, Batavia, IL 60510 USA. EM snopok@pa.msu.edu; cjj@fnal.gov; berz@msu.edu; dovs@compmath.spbu.ru; ovs@compmath.spbu.ru RI Ovsyannikov, Dmitri/H-8715-2013; Ovsyannikov, Alexander/K-7123-2013 OI Ovsyannikov, Dmitri/0000-0002-0829-2023; Ovsyannikov, Alexander/0000-0002-2467-6529 NR 13 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 142 EP 146 DI 10.1016/j.nima.2005.11.083 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200030 ER PT J AU Candel, AE Dehler, MM Troyer, M AF Candel, AE Dehler, MM Troyer, M TI A massively parallel particle-in-cell code for the simulation of field-emitter based electron sources SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE electromagnetism; charged-particle beam; free-electron lasers; computer simulation; Maxwell; self-consistent; particle dynamics; particle-in-cell; time-domain; parallel computing; C plus ID MAXWELLS EQUATIONS AB For the realistic simulation of electron sources using field emitter arrays, the sub-micron resolution required for the emitters leads to simulation models not suitable for current serial codes. Thus, a parallel high-performance 3D Particle-In-Cell code, called Capone, has been implemented in C+ + using the POOMA II framework on the Linux platform. Sophisticated C+ + expression templates techniques deliver Fortran performance combined with high-level programming and development comfort. For the computation of external fields, matching parallel field solvers are in development with the electrostatic one being completed. The Maxwell field solver is based on the Finite Integration Algorithm on a non-uniform rectilinear grid. Anisotropic epsilon and mu constants and perfect electric/magnetic materials stored in triangulated grid cells are supported as well as open, electric and magnetic boundary conditions. Self-consistent macro-particle pushing is accomplished by integrating the classical relativistic equations of motion in combination with charge-conserving current scattering onto the computational grid. Parallelization is performed by partitioning the calculation domain into patches associated to individual processors. Fields are statically distributed while Particles are concurrently distributed to processors according to their position to allow fast local interpolation. (c) 2005 Elsevier B.V. All rights reserved. C1 ETH, CH-8093 Zurich, Switzerland. Paul Scherrer Inst, Villigen, Switzerland. RP Candel, AE (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd,M-S 27, Menlo Pk, CA 94025 USA. EM arno@candel.org RI Troyer, Matthias/B-7826-2008 OI Troyer, Matthias/0000-0002-1469-9444 NR 11 TC 2 Z9 2 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 154 EP 158 DI 10.1016/j.nima.2005.11.059 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200033 ER PT J AU Kabel, A Cai, Y Dohlus, M Sen, T Uplenchwar, R AF Kabel, A Cai, Y Dohlus, M Sen, T Uplenchwar, R TI Applications of parallel computational methods to charged-particle beam dynamics SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE beam dynamics; numerical simulation; beam-beam effect; coherent synchrotron radiation AB The availability of parallel computation hardware and the advent of standardized programming interfaces has made a new class of beam dynamics problems accessible to numerical simulations. We describe recent progress in code development for simulations of coherent synchrotron radiation and the weak-strong and strong-strong beam-beam interaction. Parallelization schemes will be discussed, and typical results will be presented. (c) 2005 Elsevier B.V. All rights reserved. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. DESY, D-22603 Hamburg, Germany. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Kabel, A (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. EM akabel@slac.stanford.edu NR 10 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 163 EP 167 DI 10.1016/j.nima.2005.11.079 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200035 ER PT J AU Li, ZH Folwell, N Ge, LX Guetz, A Ivanov, V Kowalski, M Lee, LQ Ng, CK Schussman, G Stingelin, L Uplenchwar, R Wolf, M Xiao, LL Ko, K AF Li, ZH Folwell, N Ge, LX Guetz, A Ivanov, V Kowalski, M Lee, LQ Ng, CK Schussman, G Stingelin, L Uplenchwar, R Wolf, M Xiao, LL Ko, K TI High-performance computing in accelerating structure design and analysis SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE acceleration; linear collider; cavity design; wakefield; parallel electromagnetic codes; unstructured grid; high-performance computing; large-scale simulation AB Future high-energy accelerators such as the Next Linear Collider (NLC) will accelerate multi-bunch beams of high current and low emittance to obtain high luminosity, which put stringent requirements on the accelerating structures for efficiency and beam stability. While numerical modeling has been quite standard in accelerator R&D, designing the NLC accelerating structure required a new simulation capability because of the geometric complexity and level of accuracy involved. Under the US DOE Advanced Computing initiatives (first the Grand Challenge and now SciDAC), SLAC has developed a suite of electromagnetic codes based on unstructured grids and utilizing high-performance computing to provide an advanced tool for modeling structures at accuracies and scales previously not possible. This paper will discuss the code development and computational science research (e.g. domain decomposition, scalable eigensolvers, adaptive mesh refinement) that have enabled the large-scale simulations needed for meeting the computational challenges posed by the NLC as well as projects such as the PEP-II and RIA. Numerical results will be presented to show how high-performance computing has made a qualitative improvement in accelerator structure modeling for these accelerators, either at the component level (single cell optimization), or on the scale of an entire structure (beam heating and long-range wakefields). (c) 2005 Elsevier B.V. All rights reserved. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94305 USA. Univ Illinois, Urbana, IL 61801 USA. RP Li, ZH (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94305 USA. EM lizh@slac.stanford.edu NR 6 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 168 EP 174 DI 10.1016/j.nima.2005.11.080 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200036 ER PT J AU Ng, CK Folwell, N Guetz, A Ivanov, V Lee, LQ Li, ZH Schussman, G Ko, K AF Ng, CK Folwell, N Guetz, A Ivanov, V Lee, LQ Li, ZH Schussman, G Ko, K TI Simulating dark current in NLC structures SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE particle accelerator; electromagnetism; dark current ID EMISSION AB Dark current generation and capture are of great importance in high gradient accelerating structure R&D especially for the NLC which aims to operate at 65 MV/m with specific limits on dark current and RF breakdown rates. Although considerable effort has been devoted to building and testing various types of structures to meet these requirements, few theoretical studies have been done to understand these effects in actual structures. This paper focuses on the simulation of dark current in a NLC test structure for which experimental data are available. The parallel time-domain field solver Tau3P and the parallel particle tracking code Track3P are used together to simulate, for the first time, a dark current pulse to compare with the data measured downstream. Results from SLAC X-band 30-cell constant impedance structure for RF drive pulses with different rise times are presented and discussed. (c) 2005 Elsevier B.V. All rights reserved. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Ng, CK (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. EM cho@slac.stanford.edu NR 10 TC 2 Z9 2 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 EI 1872-9576 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 192 EP 195 DI 10.1016/j.nima.2005.11.072 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200040 ER PT J AU Johnstone, C Berz, M Makino, K AF Johnstone, C Berz, M Makino, K TI Staging acceleration and cooling in a Neutrino Factory SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE Neutrino Factory; Muon acceleration; FFAGs ID FIELDS AB All schemes to produce intense sources of high-energy muons-Neutrino factories, beta beams, Colliders-require collection, RF capture, and transport of particle beams with unprecedented emittances, both longitudinally and transversely. These large initial emittances must be reduced or "cooled" both in size and in energy spread before the muons can be efficiently accelerated to multi-GeV energies. The acceleration stage becomes critical in formulating and optimizing muon beams; individual stages are strongly interlinked and not independent as is the case in most conventional acceleration systems. Most importantly, the degree of cooling, or cooling channel, depends on the choice of acceleration. In the current US baseline scenario, the cooling required for acceleration is about a factor of 10 in transverse emittance per plane. Longitudinal cooling is also required. In the proposed Japanese scenario, using an alternative acceleration scheme, no cooling is presumed. This work discusses two basic, but different approaches to a Neutrino Factory and how the optimal strategy depends on beam parameters and method of acceleration. Published by Elsevier B.V. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. RP Johnstone, C (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM cjj@fnal.gov; berz@msu.edu NR 23 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 282 EP 291 DI 10.1016/j.nima.2005.11.078 PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200062 ER PT J AU Lebedev, V Nagaslaev, V Valishev, A Sajaev, V AF Lebedev, V Nagaslaev, V Valishev, A Sajaev, V TI Measurement and correction of linear optics and coupling at tevatron complex SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE beam optics AB The optics measurements have played important role in improving the performance of Tevatron collider. Until recently, most of them were based on the differential orbit measurements with data analysis, which neglects measurement inaccuracies such as differences in differential responses of beam position monitors, their rolls, etc. To address these complications we have used a method based on the analysis of many differential orbits. That creates the redundancy in the data allowing to get more detailed understanding of the machine. In this article, we discuss the progress with Tevatron optics correction.. its present status and future improvements. (c) 2005 Elsevier B.V. All rights reserved. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. ANL, Argonne, IL 60439 USA. RP Lebedev, V (reprint author), Fermilab Natl Accelerator Lab, MS 340,POB 500, Batavia, IL 60510 USA. EM val@fnal.gov NR 4 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 299 EP 302 DI 10.1016/j.nima.2005.11.027 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200065 ER PT J AU Parsa, Z Zadorozhny, V AF Parsa, Z Zadorozhny, V TI Approximation technique for solving the Vlasov-Poisson problem SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE L-moment problem; Vlasov-Poisson equation AB In this paper, we describe the beam distribution in particle accelerators in the framework of a Vlasov-Poisson scheme. A new approach to the investigation and numerical simulation is based on the property of an universality of Maxwell equations, and L-moment problem. In this scheme, it is possible to reduce a problem of an optimal stabilization of the given motion to the L-moment problem using its regular approximation technique and well developed computational procedures. (c) 2005 Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, Phys Dept 510A, Upton, NY 11973 USA. Ukrainian Acad Sci, Inst Cybernet, Kiev, Ukraine. RP Parsa, Z (reprint author), Brookhaven Natl Lab, Phys Dept 510A, Upton, NY 11973 USA. EM parsa@bnl.com NR 10 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 311 EP 313 DI 10.1016/j.nima.2005.11.030 PG 3 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200068 ER PT J AU Yan, YT Cai, Y AF Yan, YT Cai, Y TI Precision PEP-II optics measurement with an SVD-enhanced least-square fitting SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE optics measurement; least-square fitting; electron-positron storage rings AB A singular value decomposition (SVD)-enhanced Least-Square fitting technique is discussed. By automatic identifying, ordering, and selecting dominant SVD modes of the derivative matrix that responds to the variations of the variables, the converging process of the Least-Square fitting is significantly enhanced. Thus the fitting speed can be fast enough for a fairly large system. This technique has been successfully applied to precision PEP-II optics measurement in which we determine all quadrupole strengths (both normal and skew components) and sextupole feed-downs as well as all BPM gains and BPM cross-plane couplings through Least-Square fitting of the phase advances and the Local Green's functions as well as the coupling ellipses among BPMs. The local Green's functions are specified by 4 local transfer matrix components R12, R34, R32, R14. These measurable quantities (the Green's functions, the phase advances and the coupling ellipse tilt angles and axis ratios) are obtained by analyzing turn-by-turn Beam Position Monitor (BPM) data with a high-resolution model-independent analysis (MIA). Once all of the quadrupoles and sextupole feed-downs are determined, we obtain a computer virtual accelerator which matches the real accelerator in linear optics. Thus, beta functions, linear coupling parameters, and interaction point (IP) optics characteristics can be measured and displayed. (c) 2005 Elsevier B.V. All rights reserved. C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Yan, YT (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM yan@slac.stanford.edu NR 6 TC 4 Z9 5 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 336 EP 339 DI 10.1016/j.nima.2005.11.071 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200074 ER PT J AU Qiang, J Furman, MA Ryne, RD Fischer, W Ohmi, K AF Qiang, J Furman, MA Ryne, RD Fischer, W Ohmi, K TI Recent advances of strong-strong beam-beam simulation SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 8th International Computational Accelerator Physics Conference CY JUN 29-JUL 02, 2004 CL St Petersburg State Univ, St Petersburg, RUSSIA HO St Petersburg State Univ DE beam-beam simulation ID COLLIDERS AB In this paper, we report on recent advances in strong-strong beam-beam simulation. Numerical methods used in the calculation of the beam-beam forces are reviewed. A new computational method to solve the Poisson equation on nonuniform grid is presented. This method reduces the computational cost by a half compared with the standard FFT based method on uniform grid. It also appears to be more accurate than the standard method for a colliding beam with low transverse aspect ratio. In applications, we present the study of coherent modes with multi-bunch, multi-collision beam-beam interactions at RHIC. We also present the strong-strong simulation of the luminosity evolution at KEKB with and without finite crossing angle. (c) 2005 Elsevier B.V. All rights reserved. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan. RP Qiang, J (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM jqiang@lbl.gov NR 16 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 EI 1872-9576 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 1 PY 2006 VL 558 IS 1 BP 351 EP 355 DI 10.1016/j.nima.2005.11.045 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 023YN UT WOS:000236162200077 ER PT J AU Allen, FI Persaud, A Park, SJ Minor, A Sakurai, M Schneider, DH Schenkel, T AF Allen, FI Persaud, A Park, SJ Minor, A Sakurai, M Schneider, DH Schenkel, T TI Transport of multiply and highly charged ions through nanoscale apertures in silicon nitride membranes SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article DE slow highly charged ions; capillary transmission; charge exchange ID SLOW; IMPLANTATION; SURFACES AB We report on experimental studies of the transport of multiply (Ar-2,Ar-3+; 0.2-0.3 keV/u) and highly charged ions (Ar16+, Xe44+, 2-3 keV/u) through nanoscale apertures. Arrays of apertures with diameters of 50-200 nm and aspect ratios of 1.5:1-1:5 were formed in silicon nitride membranes by focused ion beam drilling in combination with ion beam assisted thin film deposition. The fraction of ions undergoing charge exchange is found to be in agreement with model predictions for low charge state ions, while it is much lower than expected for high charge state ions. We discuss results in relation to a classical over-the-barrier model and capillary guiding mechanisms. (c) 2005 Elsevier B.V. All rights reserved. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Humboldt Univ, Inst Phys, Lehrstuhl Plasmaphys, D-12489 Berlin, Germany. RP Allen, FI (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM allen@physik.hu-berlin.de NR 14 TC 14 Z9 14 U1 0 U2 2 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 MAR PY 2006 VL 244 IS 2 BP 323 EP 326 DI 10.1016/j.nimb.2005.10.029 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 017VY UT WOS:000235722600004 ER PT J AU Pruet, J Brown, D Beck, B McNabb, DP AF Pruet, J Brown, D Beck, B McNabb, DP TI Alternative approach to nuclear data representation SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article DE nuclear reactions : general; nuclear engineering and nuclear power studies; computer data analysis AB This paper considers an approach for representing nuclear data that is qualitatively different from the approach currently adopted by the nuclear science community. Specifically, we examine a representation in which complicated data is described through collections of distinct and self-contained simple data structures. This structure-based representation is compared with the ENDF and ENDL formats, which can be roughly characterized as dictionary-based representations. A pilot data representation for replacing the format currently used at LLNL is presented. Examples are given as is a discussion of promises and shortcomings associated with moving from traditional dictionary-based formats to a structure-rich or class-like representation. (c) 2005 Elsevier B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94550 USA. EM pruet1@llnl.gov NR 7 TC 1 Z9 1 U1 0 U2 0 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 MAR PY 2006 VL 244 IS 2 BP 473 EP 480 DI 10.1016/j.nimb.2005.10.015 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 017VY UT WOS:000235722600026 ER PT J AU Golterman, M Izubuchi, T Shamir, Y AF Golterman, M Izubuchi, T Shamir, Y TI Double poles in lattice QCD with mixed actions SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT Workshop on Computational Hadron Physics CY SEP 14-17, 2005 CL Nicosia, CYPRUS ID SCATTERING AB We consider effects resulting from the use of different discretizations for the valence and the sea quarks, considering Wilson and/or Ginsparg-Wilson fermions. We assume that such effects appear through scaling violations that can be studied using effective-lagrangian techniques. We show that a double pole is present in flavor-neutral Goldstone meson propagators, even if the flavor non-diagonal Goldstone mesons made out of valence or sea quark have equal masses. We then consider some observables known to be anomalously sensitive to the presence of a double pole. We find that the double-pole enhanced scaling violations may turn out to be rather small in practice. C1 San Francisco State Univ, Dept Phys & Astron, San Francisco, CA 94132 USA. Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA. Kanazawa Univ, Inst Theoret Phys, Kanazawa, Ishikawa 9201192, Japan. Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Ramat Aviv, Israel. RP Golterman, M (reprint author), San Francisco State Univ, Dept Phys & Astron, 1600 Holloway Ave, San Francisco, CA 94132 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAR PY 2006 VL 153 BP 135 EP 138 DI 10.1016/j.nuclphysbps.2006.01.020 PG 4 WC Physics, Particles & Fields SC Physics GA 021SI UT WOS:000236005100020 ER PT J AU Lin, HW Ohta, S Yamada, N AF Lin, HW Ohta, S Yamada, N CA RBC Collaboration TI Charm mesons with DWF quarks on a quenched 3 GeV lattice SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT Workshop on Computational Hadron Physics CY SEP 14-17, 2005 CL Nicosia, CYPRUS ID HEAVY; SPECTRUM; QCD AB We present some preliminary results on charmed meson spectroscopy from a 13,1KEN-ML-Colunibia lattice numerical claculations. We use domain-wall fermions (DWF) for all quark flavors including charm. To make this meaningful we use quenched gauge ensemble with lattice cutoff alpha(-1) of about 3 GeV obtained with the DBW2 rectangular improved action. With the strange quark mass estimate Of m(strange)a = 0.030 from the associated kaon sector calculations, we obtain a charm mass estimate Of n(charm)a = 0.360(7) by fitting the D. meson mass. With these and additional extrapolations for light quark mass to the chiral limit, we discuss charmed (D and D*) and charm-strange (D-s and D-sJ) mesons with spin-parity J(P) = 0(+/-) and 1(+/-). We also discuss our preliminary results for the pseudoscalar meson (D and D-s) decay constants. C1 Columbia Univ, Dept Phys, New York, NY 10027 USA. KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 3050801, Japan. Grad Univ Adv Studies, SOKENDAI, Dept Phys, Tsukuba, Ibaraki 3050801, Japan. Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. RP Lin, HW (reprint author), Columbia Univ, Dept Phys, 538 W 120th St, New York, NY 10027 USA. EM shigemi.ohta@kek.jp NR 18 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAR PY 2006 VL 153 BP 199 EP 206 DI 10.1016/j.nuclphysbps.2006.01.046 PG 8 WC Physics, Particles & Fields SC Physics GA 021SI UT WOS:000236005100028 ER PT J AU Basak, S Edwards, RG Fleming, GT Heller, UM Lichtl, A Morningstar, C Richards, DG Sato, I Wallace, S AF Basak, S Edwards, RG Fleming, GT Heller, UM Lichtl, A Morningstar, C Richards, DG Sato, I Wallace, S TI Baryon operators and baryon spectroscopy SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT Workshop on Computational Hadron Physics CY SEP 14-17, 2005 CL Nicosia, CYPRUS ID LATTICE QCD; QUARK-MODEL; MATRIX; OCTET AB The issues involved in a determination of the baryon resonance spectrum in lattice QCD are discussed. The variational method is introduced and the need to construct a sufficient basis of interpolating operators is emphasised. The construction of baryon operators using group-theory techniques is outlined. We find that the use both of quark-field smearing and link-field smearing in the operators is essential firstly to reduce the coupling of operators to high-frequency modes and secondly to reduce the gauge-field fluctuations in correlators. We conclude with a status report of our current investigation of baryon spectroscopy. C1 Univ Maryland, Dept Phys, College Pk, MD 20742 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Yale Univ, Sloane Phys Lab, New Haven, CT 06520 USA. Amer Phys Soc, Ridge, NY 11961 USA. Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA. RP Univ Maryland, Dept Phys, College Pk, MD 20742 USA. EM dgr@jlab.org RI Fleming, George/L-6614-2013; Morningstar, Colin/N-6925-2014; OI Fleming, George/0000-0002-4987-7167; Morningstar, Colin/0000-0002-0607-9923; Heller, Urs M./0000-0002-2780-5584 NR 18 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 EI 1873-3832 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAR PY 2006 VL 153 BP 242 EP 249 DI 10.1016/j.nuclphysbps.2006.01.040 PG 8 WC Physics, Particles & Fields SC Physics GA 021SI UT WOS:000236005100034 ER PT J AU Lasscock, BG Hedditch, J Kamleh, W Leinweber, DB Melnitchouk, W Thomas, AW Williams, AG Young, RD Zanotti, JM AF Lasscock, BG Hedditch, J Kamleh, W Leinweber, DB Melnitchouk, W Thomas, AW Williams, AG Young, RD Zanotti, JM TI Lattice QCD studies of pentaquarks and exotics SO NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS LA English DT Article; Proceedings Paper CT Workshop on Computational Hadron Physics CY SEP 14-17, 2005 CL Nicosia, CYPRUS ID MASSES AB The possible discovery of the Theta(+) pentaquark has motivated a number of studies into its nature using lattice QCD. Initial studies focused on spin-1/2 states and more recently also spin-3/2 states. Here we report the results of the first exploratory study in quenched lattice QCD of pentaquarks with both spin-1/2 and spin-3/2 using the FLIC fermion action. We do not find any evidence for the standard lattice resonance signature of attraction (i.e. binding at quark masses near the physical regime) in the spin-1/2 channels or in the J(P) = 3/2(-) channel. Some evidence of binding is inferred in the isoscalar 3/2(+) channel. We also present the results of our study into exotic meson states using hybrid meson interpolators with explicit gluonic degrees of freedom. We find a candidate for the J(PC) = 1(-+) exotic meson which has a mass consistent with the pi(1) (1600) experimental candidate. C1 Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia. Univ Adelaide, Dept Phys, Adelaide, SA 5005, Australia. Univ Dublin Trinity Coll, Sch Math, Dublin 2, Ireland. Jefferson Lab, Newport News, VA 23606 USA. Univ Edinburgh, Sch Phys, Edinburgh EH9 3JZ, Midlothian, Scotland. RP Lasscock, BG (reprint author), Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia. RI Zanotti, James/H-8128-2012; Young, Ross/H-8207-2012; Williams, Anthony/I-6698-2012; Leinweber, Derek/J-6705-2013; OI Zanotti, James/0000-0002-3936-1597; Leinweber, Derek/0000-0002-4745-6027; Williams, Anthony/0000-0002-1472-1592; Thomas, Anthony/0000-0003-0026-499X NR 21 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5632 J9 NUCL PHYS B-PROC SUP JI Nucl. Phys. B-Proc. Suppl. PD MAR PY 2006 VL 153 BP 348 EP 353 DI 10.1016/j.nuclphysbps.2006.01.026 PG 6 WC Physics, Particles & Fields SC Physics GA 021SI UT WOS:000236005100048 ER PT J AU Carew, JF Hu, K AF Carew, JF Hu, K TI Effect of transverse neutron leakage on the attenuation of the displacements per atom in the reactor pressure vessel SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article AB The changes in the energy dependence of the neutron removal cross section at the vessel inner wall water/steel interface produce a substantial shift in the neutron spectrum as the fluence propagates into the pressure vessel. To account for this spectral shift, Regulatory Guide 1.99, Revision 2 requires that the fluence used in determining the reference temperature for nil-ductility transition RTNDT be extrapolated from the pressure vessel inner surface using the displacements per atom (dpa). The strong azimuthal and axial variation of the fluence at the vessel inner wall results in a substantial redistribution of the fluence as it propagates through the vessel due to transverse neutron leakage (i.e., perpendicular to the radial direction through the vessel). This transverse leakage tends to increase the dpa radial attenuation in regions of high fluence and reduce the attenuation in regions of low fluence. A series of pressure vessel fluence calculations has been carried out to determine the effect of (a) the transverse neutron leakage and (b) the plant-specific reactor design configuration on the radial attenuation of the dpa through the vessel. The calculations were performed for four operating pressurized water reactors and were carried out using the methods described in U.S. Nuclear Regulatory Commission Regulatory Guide 1.190. The calculations were performed with the DORT discrete ordinates transport code using ENDF/B-VI neutron transport and dpa cross sections. The transverse leakage is found to introduce a substantial variation of the dpa attenuation rate over the inner surface of the vessel. In the belt-line region opposite the core, the transverse leakage results in an similar to 6 to 14% azimuthal variation and an similar to 3 to 11% axial variation in the dpa at a 15-cm depth into the vessel, depending on the plant configuration. In order to simplify the determination of Delta RTNDT in probabilistic fracture mechanics analyses, conservative belt-line and reflector region dpa attenuation rates have been determined. Plant-specific analytic expressions for the radial dependence of the dpa through the vessel have also been determined. C1 Brookhaven Natl Lab, Dept Energy Sci & Technol, Nucl Sci & Technol Div, Upton, NY 11973 USA. RP Carew, JF (reprint author), Brookhaven Natl Lab, Dept Energy Sci & Technol, Nucl Sci & Technol Div, POB 5000, Upton, NY 11973 USA. EM carew@bnl.gov NR 10 TC 0 Z9 0 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD MAR PY 2006 VL 152 IS 3 BP 256 EP 273 PG 18 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 019KD UT WOS:000235833100002 ER PT J AU Buongiorno, J Sterbentz, JW MacDonald, PE AF Buongiorno, J Sterbentz, JW MacDonald, PE TI Study of solid moderators for the thermal-spectrum supercritical water-cooled reactor SO NUCLEAR TECHNOLOGY LA English DT Article DE supercritical watercooled reactors; solid moderator; zirconium hydride ID ZIRCONIUM HYDRIDE; HYDROGEN; IRRADIATION; ZR AB The supercritical water-cooled nuclear reactor (SCWR) concept offers potential for superior economics due to its high thermal efficiency and plant simplification. However, design of a thermal-spectrum core for such a reactor is complicated by the relatively low density of the water coolant and therefore reduced moderation. This requires the SCWR design to include a dedicated moderator. One solution explored worldwide is based on the use of water rods. In this paper we assess the feasibility of a different approach based on solid moderators, which has some potential advantages including increased core thermal capacity, reduced coolant worth, and simplified vessel internals. The neutronic performance of several solid moderators was evaluated and compared to that of water rods. It was found that the only acceptable solid moderator is zirconium hydride. Axial and local peaking can be readily suppressed by modest variations of the enrichment in a manner similar to the boiling water reactor practice. The Doppler and coolant reactivity coefficients are both negative and in the range of light water reactor experience. The use of zirconium hydride as a stable structural core component was evaluated and found to be acceptable under steady-state and accident conditions. In addition to its chemical and mechanical stability, zirconium hydride can also be fabricated with existing technology. However, its impact on the SCWR cost of electricity generation is deemed significant. C1 MIT, Cambridge, MA 02139 USA. Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. RP Buongiorno, J (reprint author), MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA. EM jacopo@mit.edu NR 50 TC 6 Z9 7 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD MAR PY 2006 VL 153 IS 3 BP 282 EP 303 PG 22 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 018HJ UT WOS:000235754700006 ER PT J AU Zhao, K Upadhyaya, BR Wood, RT AF Zhao, K Upadhyaya, BR Wood, RT TI Robust dynamic sensor fault detection and isolation of helical coil steam generator systems using a subspace identification technique SO NUCLEAR TECHNOLOGY LA English DT Article DE fault detection and isolation; helical coil steam generator; subspace identification ID FIELD DEVICES AB A design approach to sensor fault detection and isolation (FDI) of helical coil steam generator (HCSG) systems of the International Reactor Innovation Secure (IRIS) reactor is presented. In the design phase, a physical model is first developed to provide a realistic simulation and generate data characterizing the system dynamics. A subspace identification technique is then used to extract a low-order linear state-space model from the data. Finally, a robust dynamic parity space approach is utilized to design residual generators for FDI This design approach is able to achieve fault isolation following a predetermined logic without the need to use data during fault conditions, which is an unrealistic assumption of many FDI approaches studied for nuclear power plants. The results of the HCSG application show that the approach is robust to not only measurement and process noises but also operation condition changes and has the capability of correct FDI during reactor power transients and during the propagation of sensor faults in a control loop. C1 Univ Tennessee, Nucl Engn Dept, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Zhao, K (reprint author), Univ Tennessee, Nucl Engn Dept, Knoxville, TN 37996 USA. EM bupadhya@utk.edu NR 24 TC 2 Z9 2 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD MAR PY 2006 VL 153 IS 3 BP 326 EP 340 PG 15 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 018HJ UT WOS:000235754700009 ER PT J AU Falgout, RD AF Falgout, RD TI Special issue on multigrid methods SO NUMERICAL LINEAR ALGEBRA WITH APPLICATIONS LA English DT Editorial Material C1 Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94550 USA. RP Falgout, RD (reprint author), Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94550 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 1070-5325 J9 NUMER LINEAR ALGEBR JI Numer. Linear Algebr. Appl. PD MAR-APR PY 2006 VL 13 IS 2-3 BP 85 EP 85 DI 10.1002/nla.483 PG 1 WC Mathematics, Applied; Mathematics SC Mathematics GA 024TD UT WOS:000236218200001 ER PT J AU Evans, JW Sommargren, G Macintosh, BA Severson, S Dillon, D AF Evans, JW Sommargren, G Macintosh, BA Severson, S Dillon, D TI Effect of wavefront error on 10(-7) contrast measurements SO OPTICS LETTERS LA English DT Article AB We have measured a contrast of 6.5 x 10(-8) from 10 to 25 gimel/D in visible light on the Extreme Adaptive Optics testbed, using a shaped pupil for diffraction suppression. The testbed was designed with a minimal number of high-quality optics to ensure low wavefront error and uses a phase-shifting diffraction interferometer for metrology. This level of contrast is within the regime needed for imaging young Jupiter-like planets, a primary application of high-contrast imaging. We have concluded that wavefront error, not pupil quality, is the limiting error source for improved contrast in our system. (c) 2006 Optical Society of America. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Lab Adapt Opt, Santa Cruz, CA 95064 USA. RP Evans, JW (reprint author), Univ Calif Davis, Davis, CA 95616 USA. EM evans74@llnl.gov NR 6 TC 11 Z9 11 U1 0 U2 3 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 MAR 1 PY 2006 VL 31 IS 5 BP 565 EP 567 DI 10.1364/OL.31.000565 PG 3 WC Optics SC Optics GA 015DR UT WOS:000235532600001 PM 16570399 ER PT J AU Carr, CW Auerbach, JM AF Carr, CW Auerbach, JM TI Effect of multiple wavelengths on laser-induced damage in KH(2-x)DxPO4 crystals SO OPTICS LETTERS LA English DT Article ID POTASSIUM DIHYDROGEN PHOSPHATE; IRRADIATION AB Laser-induced damage is a key factor that constrains the ways in which optical materials are used in high-power laser systems. We study the size and density of bulk laser-induced damage sites formed during frequency tripling in a DKDP crystal. The characteristics of the damage sites formed during tripling, for which 1053, 526, and 351 am light is simultaneously present, are compared to those of damage sites formed by 351 nm light alone. The fluence of each wavelength is calculated as a function of depth with a full 4D(x,y,z,t) frequency conversion code and compared with measured damage density and size distributions. The density of damage is found to be governed predominantly by 351 nm light with some lesser, though nonnegligible, contribution from 526 nm light. The 1053 nm light does not appear to contribute to the damage density. The morphology of the damage sites, however, is seen to be relatively insensitive to wavelength and to depend only on total fluence of all wavelengths present. The strong and negligible wavelength dependences of initiation density and damage morphology, respectively, indicate that the dominant energy deposition mechanism varies during the damaging pulse. (c) 2006 Optical Society of America. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Carr, CW (reprint author), Lawrence Livermore Natl Lab, Mail Stop L-592,7000 East Ave, Livermore, CA 94550 USA. EM carr19@llnl.gov RI Carr, Chris/F-7163-2013 NR 11 TC 14 Z9 16 U1 1 U2 7 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 MAR 1 PY 2006 VL 31 IS 5 BP 595 EP 597 DI 10.1364/OL.31.000595 PG 3 WC Optics SC Optics GA 015DR UT WOS:000235532600011 PM 16570409 ER PT J AU Gilbert, Y Bachelot, R Royer, P Bouhelier, A Wiederrecht, GP Novotny, L AF Gilbert, Y Bachelot, R Royer, P Bouhelier, A Wiederrecht, GP Novotny, L TI Longitudinal anisotropy of the photoinduced molecular migration in azobenzene polymer films SO OPTICS LETTERS LA English DT Article ID SURFACE-RELIEF GRATINGS; NEAR-FIELD; BEAMS; TIP AB The effects of tightly focused, higher-order laser beams on the photoinduced molecular migration and surface deformations in azobenzene polymer films are investigated. We demonstrate that the surface relief is principally triggered by longitudinal fields, i.e., electric fields polarized along the optical axis of the focused beam. Our findings can be explained by the translational diffusion of isomerized chromophores when the constraining effect of the polymer-air interface is considered. (c) 2006 Optical Society of America. C1 CNRS, FRE 2971, Lab Nanotechnol & Instrumentat Opt, Troyes, France. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. Univ Rochester, Inst Opt, Rochester, NY 14627 USA. Univ Bourgogne, Phys Lab, F-21078 Dijon, France. RP Gilbert, Y (reprint author), CNRS, FRE 2971, Lab Nanotechnol & Instrumentat Opt, 12 Rue Marie Curie,BP 2060, Troyes, France. EM bouhelier@anl.gov RI Bouhelier, Alexandre/A-1960-2010; Bachelot, Renaud/M-6888-2015 NR 16 TC 34 Z9 34 U1 0 U2 4 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 MAR 1 PY 2006 VL 31 IS 5 BP 613 EP 615 DI 10.1364/OL.31.000613 PG 3 WC Optics SC Optics GA 015DR UT WOS:000235532600017 PM 16570415 ER PT J AU Bartlett, RA Biegler, LT AF Bartlett, RA Biegler, LT TI QPSchur: A dual, active-set, Schur-complement method for large-scale and structured convex quadratic programming SO OPTIMIZATION AND ENGINEERING LA English DT Article DE quadratic programming; Schur complement; active-set; dual space; object oriented programming AB We describe an active-set, dual-feasible Schur-complement method for quadratic programming QP) with positive definite Hessians. The formulation of the QP being solved is general and flexible, and is appropriate for many different application areas. Moreover, the specialized structure of the QP is abstracted away behind a fixed KKT matrix called K,, and other problem matrices, which naturally leads to an object-oriented software implementation. Updates to the working set of active inequality constraints are facilitated using a dense Schur complement, which we expect to remain small. Here, the dual Schur complement method requires the projected Hessian to be positive definite for every working set considered by the algorithm. Therefore, this method is not appropriate for all QPs, While the Schur complement approach to linear algebra is very flexible with respect to allowing exploitation of problem structure, it is not as numerically stable as approaches using a QR factorization. However, we show that the use of fixed-precision iterative refinement helps to dramatically improve the numerical stability of this Schur complement algorithm. The use of the object-oriented QP solver implementation is demonstrated on two different application areas with specializations in each area; large-scale model predictive control (MPC) and reduced-space successive quadratic programming (with several different representations for the reduced Hessian). These results demonstrate that the QP solver can exploit application-specific structure in a computationally efficient and fairly robust manner as compared to other QP solver implementations. C1 Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Biegler, LT (reprint author), Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. EM rabartl@sandia.gov; lb01@andrew.cmu.edu NR 17 TC 27 Z9 27 U1 0 U2 3 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 1389-4420 J9 OPTIM ENG JI Optim. Eng. PD MAR PY 2006 VL 7 IS 1 BP 5 EP 32 DI 10.1007/s11081-006-6588-z PG 28 WC Engineering, Multidisciplinary; Operations Research & Management Science; Mathematics, Interdisciplinary Applications SC Engineering; Operations Research & Management Science; Mathematics GA 038PO UT WOS:000237235000001 ER PT J AU Kende, H AF Kende, H TI Remembering Lee McIntosh (1949-2004), a pioneer in the molecular biology of chloroplast and mitochondrion function - Obituary SO PHOTOSYNTHESIS RESEARCH LA English DT Biographical-Item C1 Michigan State Univ, MSU DOE Plant Res Lab, E Lansing, MI 48824 USA. RP Kende, H (reprint author), Michigan State Univ, MSU DOE Plant Res Lab, E Lansing, MI 48824 USA. EM hkende@msu.edu NR 0 TC 0 Z9 0 U1 1 U2 1 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0166-8595 J9 PHOTOSYNTH RES JI Photosynth. Res. PD MAR PY 2006 VL 87 IS 3 BP 247 EP 251 DI 10.1007/s11120-006-9037-0 PG 5 WC Plant Sciences SC Plant Sciences GA 042EM UT WOS:000237510700002 PM 16479363 ER PT J AU Scherbakov, AV Alkimov, AV Yakovlev, DR Merkulov, IA Bayer, M Waag, A Molenkamp, LW AF Scherbakov, AV Alkimov, AV Yakovlev, DR Merkulov, IA Bayer, M Waag, A Molenkamp, LW TI Picosecond kinetics of magnetization in optically excited (Zn,Mn)Se quantum wells SO PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS LA English DT Article; Proceedings Paper CT 12th International Conference on II-VI Compounds CY SEP 12-16, 2005 CL Warsaw, POLAND ID ENERGY-TRANSFER; SPIN; RELAXATION; SYSTEM; IONS AB The magnetization kinetics in (Zn,Mn)Se/(Zn,Be)Se quantum wells is studied on a ps-time scale after pulsed laser excitation. The magnetization induced by an external magnetic field is reduced by up to 30% within about 100 ps due to spin and energy transfer from photocarriers to magnetic Mn ions. A model based on spin-momentum coupling in the valence band is suggested for explaining this transfer. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. C1 AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia. Univ Dortmund, D-44227 Dortmund, Germany. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Tech Univ Carolo Wilhelmina Braunschweig, Inst Semicond Technol, D-38106 Braunschweig, Germany. Univ Wurzburg, Inst Phys, D-97074 Wurzburg, Germany. RP AF Ioffe Phys Tech Inst, Politekhnicheskaya 26, St Petersburg 194021, Russia. EM scherbakov@mail.ioffe.ru OI Molenkamp, Laurens/0000-0003-4833-5179 NR 14 TC 0 Z9 0 U1 1 U2 2 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA POSTFACH 101161, 69451 WEINHEIM, GERMANY SN 0370-1972 EI 1521-3951 J9 PHYS STATUS SOLIDI B JI Phys. Status Solidi B-Basic Solid State Phys. PD MAR PY 2006 VL 243 IS 4 BP 934 EP 938 DI 10.1002/pssb.200564681 PG 5 WC Physics, Condensed Matter SC Physics GA 028JQ UT WOS:000236483900038 ER PT J AU Aguilar, A Gillaspy, JD Gribakin, GF Phaneuf, RA Gharaibeh, MF Kozlov, MG Bozek, JD Kilcoyne, ALD AF Aguilar, A Gillaspy, JD Gribakin, GF Phaneuf, RA Gharaibeh, MF Kozlov, MG Bozek, JD Kilcoyne, ALD TI Absolute photoionization cross sections for Xe4+, Xe5+, and Xe6+ near 13.5 nm: Experiment and theory SO PHYSICAL REVIEW A LA English DT Article ID EXTREME-ULTRAVIOLET; RADIATION TRANSPORT; CHARGED IONS; 4D THRESHOLD; BA+ IONS; XE+ IONS; XENON; LITHOGRAPHY; PLASMA; EUV AB Absolute photoionization cross-section measurements for a mixture of ground and metastable states of Xe4+, Xe5+, and Xe6+ are reported in the photon energy range of 4d -> nf transitions, which occur within or adjacent to the 13.5 nm window for extreme ultraviolet lithography light source development. The reported values allow the quantification of opacity effects in xenon plasmas due to these 4d -> nf autoionizing states. The oscillator strengths for the 4d -> 4f and 4d -> 5f transitions in Xeq+ (q=1-6) ions are calculated using nonrelativistic Hartree-Fock and random phase approximations. These are compared with published experimental values for Xe+ to Xe3+ and with the values obtained from the present experimental cross-section measurements for Xe4+ to Xe6+. The calculations assisted in the determination of the metastable content in the ion beams for Xe5+ and Xe6+. The experiments were performed by merging a synchrotron photon beam generated by an undulator beamline of the Advanced Light Source with an ion beam produced by an electron cyclotron resonance ion source. C1 Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. Queens Univ Belfast, Dept Appl Math & Theoret Phys, Belfast BT7 1NN, Antrim, North Ireland. Univ Nevada, Dept Phys, Reno, NV 89557 USA. Petersburg Nucl Phys Inst, Gatchina 188300, Russia. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Aguilar, A (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA. EM alex.aguilar@jpl.nasa.gov; john.gillaspy@nist.gov; g.gribakin@am.qub.ac.uk; phaneuf@physics.unr.edu RI Bozek, John/E-4689-2010; Kozlov, Mikhail/D-8963-2011; Bozek, John/E-9260-2010; Kilcoyne, David/I-1465-2013 OI Kozlov, Mikhail/0000-0002-7751-6553; Bozek, John/0000-0001-7486-7238; NR 40 TC 19 Z9 19 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD MAR PY 2006 VL 73 IS 3 AR 032717 DI 10.1103/PhysRevA.73.032717 PG 10 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 028DQ UT WOS:000236467500103 ER PT J AU Bilodeau, RC Bozek, JD Ackerman, GD Aguilar, A Berrah, N AF Bilodeau, RC Bozek, JD Ackerman, GD Aguilar, A Berrah, N TI Photodetachment of He- near the 1s threshold: Absolute cross-section measurements and postcollision interactions SO PHYSICAL REVIEW A LA English DT Article ID INNER-SHELL PHOTODETACHMENT; PHOTOIONIZATION; REGION; STATE; RESONANCES; HELIUM; ENERGY; ION AB Inner-shell photodetachment of He- is studied near the He- 1s2s2p P-4(o)-> He 2s2p P-3(o) threshold. The spectrum over this region shows significant suppression of He+ signal production due to postcollision interaction (PCI) effects. The observed shape and absolute cross section are in general agreement with theoretical predictions when corrections for semiclassical PCI effects are included. C1 Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA. Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA. Univ Nevada, Dept Phys, Reno, NV 89557 USA. RP CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. RI Bozek, John/E-4689-2010; Bozek, John/E-9260-2010; OI Bozek, John/0000-0001-7486-7238; Bilodeau, Rene/0000-0001-8607-2328 NR 27 TC 8 Z9 8 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9926 EI 2469-9934 J9 PHYS REV A JI Phys. Rev. A PD MAR PY 2006 VL 73 IS 3 AR 034701 DI 10.1103/PhysRevA.73.034701 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 028DQ UT WOS:000236467500195 ER PT J AU Houfek, K Rescigno, TN McCurdy, CW AF Houfek, K Rescigno, TN McCurdy, CW TI Numerically solvable model for resonant collisions of electrons with diatomic molecules SO PHYSICAL REVIEW A LA English DT Article ID DISSOCIATIVE ATTACHMENT; VIBRATIONAL-EXCITATION; CROSS-SECTIONS; LOCAL APPROXIMATION; NUCLEAR-DYNAMICS; SCATTERING; COMPLEX; N-2 AB We describe a simple model for electron-molecule collisions that has one nuclear and one electronic degree of freedom and that can be solved to arbitrarily high precision, without making the Born-Oppenheimer approximation, by employing a combination of the exterior complex scaling method and a finite-element implementation of the discrete-variable representation. We compare exact cross sections for vibrational excitation and dissociative attachment with results obtained using the local complex potential approximation as commonly applied in the "boomerang" model, and suggest how this two-dimensional model can be used to test the underpinnings of contemporary nonlocal approximations to resonant collisions. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. RP Houfek, K (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM khoufek@lbl.gov; tnrescigno@lbl.gov; cwmccurdy@lbl.gov NR 21 TC 12 Z9 12 U1 2 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD MAR PY 2006 VL 73 IS 3 AR 032721 DI 10.1103/PhysRevA.73.032721 PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 028DQ UT WOS:000236467500107 ER PT J AU Macek, JH Ovchinnikov, SY Gasaneo, G AF Macek, JH Ovchinnikov, SY Gasaneo, G TI Exact solution for three particles interacting via zero-range potentials SO PHYSICAL REVIEW A LA English DT Article ID BOSE-EINSTEIN CONDENSATE; 3-BODY PROBLEM; LOW-ENERGY; FESHBACH RESONANCES; SCATTERING LENGTH; RECOMBINATION; STATES; REPRESENTATION; COLLISIONS; FORCES AB Exact solutions for three identical bosons interacting via zero-range s-wave potentials are derived. The solutions are contour integrals over a product of hyperradial Bessel functions times angular functions weighted by a coefficient. The product function is a solution of the free-particle Schrodigner equation and the weight function is chosen to satisfy the zero-range boundary conditions. Scattering matrix elements for boson-dimer elastic scattering, breakup of a dimer into three particles and the time-reversed recombination process are derived. For vanishing total energy E, these quantities are given as closed-form functions of the two-body s-wave scattering length a and a three-body renormalization constant R-0. The exact results obtained by this method are compared with those obtained using other methods. Differences in the functional dependence on R-0 of the order of 2% are noted. Comparison with the hidden-crossing theory finds similar agreement with the functional dependence upon a and R-0. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Nacl Sur, Dept Fis, RA-8000 Bahia Blanca, Buenos Aires, Argentina. AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia. RP Macek, JH (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. EM serge@charcoal.phys.utk.edu RI Ovchinnikov, Serguei/C-4994-2014 NR 35 TC 16 Z9 16 U1 0 U2 7 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD MAR PY 2006 VL 73 IS 3 AR 032704 DI 10.1103/PhysRevA.73.032704 PG 14 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 028DQ UT WOS:000236467500090 ER PT J AU Reinhold, CO Yoshida, S Burgdorfer, J Zhao, W Mestayer, JJ Lancaster, JC Dunning, FB AF Reinhold, CO Yoshida, S Burgdorfer, J Zhao, W Mestayer, JJ Lancaster, JC Dunning, FB TI Realization of the kicked atom at high scaled frequencies SO PHYSICAL REVIEW A LA English DT Article ID RYDBERG ATOM; IONIZATION; DYNAMICS AB The response of quasi-one-dimensional very-high-n Rydberg atoms to a periodic train of short unidirectional electric-field pulses, termed half-cycle pulses (HCPs), is studied at high scaled frequencies. Pronounced nonmonotonic structure in the survival probability is observed as N, the number of HCPs in the train is increased, the survival probability actually increasing with N over certain ranges of N. This behavior is very sensitive to the polarization of the Rydberg states and is explained with the aid of classical simulations. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. Veinna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria. Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA. RP Reinhold, CO (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. OI Reinhold, Carlos/0000-0003-0100-4962 NR 15 TC 4 Z9 4 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD MAR PY 2006 VL 73 IS 3 AR 033420 DI 10.1103/PhysRevA.73.033420 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 028DQ UT WOS:000236467500137 ER PT J AU Yoshida, S Reinhold, CO Burgdorfer, J Zhao, W Mestayer, JJ Lancaster, JC Dunning, FB AF Yoshida, S Reinhold, CO Burgdorfer, J Zhao, W Mestayer, JJ Lancaster, JC Dunning, FB TI Influence of a dc offset field on kicked quasi-one-dimensional Rydberg atoms: Stabilization and frustrated field ionization SO PHYSICAL REVIEW A LA English DT Article ID HALF-CYCLE PULSES; HYDROGEN-ATOMS; STATES AB The influence of a superposed offset field on the response of highly polarized (quasi-1D) very-high-n Rydberg atoms to a periodic train of unidirectional half-cycle pulses (HCPs) is investigated, both experimentally and theoretically. It is observed that the presence of an offset field strongly influences the dynamics. The electronic states become transiently stabilized and trapped near the ionization threshold when the net average field they experience is near zero irrespective of whether the HCPs, applied parallel to the atomic axis, are directed towards or away from the nucleus. The nature of this stabilization is explored using Poincare surfaces of section. In large offset fields, direct field ionization becomes possible but it is demonstrated that this can be suppressed by application of an oppositely directed HCP train. The use of such "frustrated field ionization" to measure the polarization of Rydberg atoms is discussed. C1 Vienna Tech Univ, Inst Theoret Phys, Vienna, Austria. Oak Ridge Natl Lab, Phys Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA. RP Yoshida, S (reprint author), Vienna Tech Univ, Inst Theoret Phys, Vienna, Austria. OI Reinhold, Carlos/0000-0003-0100-4962 NR 19 TC 3 Z9 3 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD MAR PY 2006 VL 73 IS 3 AR 033411 DI 10.1103/PhysRevA.73.033411 PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 028DQ UT WOS:000236467500128 ER PT J AU Allen, LJ Findlay, SD Oxley, MP Witte, C Zaluzec, NJ AF Allen, LJ Findlay, SD Oxley, MP Witte, C Zaluzec, NJ TI Channeling effects in high-angular-resolution electron spectroscopy SO PHYSICAL REVIEW B LA English DT Article ID ENERGY-LOSS SPECTROSCOPY; INNER-SHELL IONIZATION; INELASTICALLY SCATTERED ELECTRONS; DYNAMIC FORM-FACTOR; CRYSTALLINE ENVIRONMENT; DIFFRACTION; DELOCALIZATION; MICROSCOPE; DEPENDENCE; SPACE AB Momentum-transfer-resolved electron spectroscopy is a technique for examining the electronic structure of materials and requires the use of detectors accepting a small range of momentum transfers. For crystalline specimens, it is necessary to consider the channeling behavior of the fast electrons both before and after inelastic scattering to adequately describe the signals produced. Using oxygen K-shell core loss in NiO as a case study, we examine channeling in high-angular-resolution electron-channeling electron spectroscopy. The roles of nonlocality and sample thickness as they relate to the channeling effect are explored. Particular attention is given to the behavior arising from the channeling of the scattered electrons, as compared with models in which only the incident electrons channel. Calculations allowing for the channeling of both the incident and the scattered electrons are computationally demanding and we explore approximations that can be made for detectors with small acceptance angles. C1 Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Argonne Natl Lab, Ctr Electron Microscopy, Div Sci Mat, Argonne, IL 60439 USA. RP Allen, LJ (reprint author), Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia. RI Findlay, Scott/C-9764-2013 OI Findlay, Scott/0000-0003-4862-4827 NR 38 TC 13 Z9 13 U1 0 U2 7 PU AMERICAN 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 MAR PY 2006 VL 73 IS 9 AR 094104 DI 10.1103/PhysRevB.73.094104 PG 11 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100050 ER PT J AU Alvine, KJ Pontoni, D Shpyrko, OG Pershan, PS Cookson, DJ Shin, K Russell, TP Brunnbauer, M Stellacci, F Gang, O AF Alvine, KJ Pontoni, D Shpyrko, OG Pershan, PS Cookson, DJ Shin, K Russell, TP Brunnbauer, M Stellacci, F Gang, O TI Solvent mediated assembly of nanoparticles confined in mesoporous alumina SO PHYSICAL REVIEW B LA English DT Article ID GOLD NANOPARTICLES; X-RAY; SCATTERING; CRYSTALLIZATION; NANOWIRES; NANOTUBES; COLLOIDS; CLUSTERS; PACKING; SURFACE AB The controlled self-assembly of thiol stabilized gold nanocrystals in a mediating solvent and confined within mesoporous alumina was probed in situ with small angle x-ray scattering. The evolution of the self-assembly process was controlled reversibly via regulated changes in the amount of solvent condensed from an undersaturated vapor. Analysis indicated that the nanoparticles self-assembled into cylindrical monolayers within the porous template. Nanoparticle nearest-neighbor separation within the monolayer increased and the ordering decreased with the controlled addition of solvent. The process was reversible with the removal of solvent. Isotropic clusters of nanoparticles were also observed to form temporarily during desorption of the liquid solvent and disappeared upon complete removal of liquid. Measurements of the absorption and desorption of the solvent showed strong hysteresis upon thermal cycling. In addition, the capillary filling transition for the solvent in the nanoparticle-doped pores was shifted to larger chemical potential, relative to the liquid/vapor coexistence, by a factor of 4 as compared to the expected value for the same system without nanoparticles. C1 Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA. Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. Harvard Univ, Dept Phys, Cambridge, MA 02138 USA. Argonne Natl Lab, Australian Synchrotron Res Program, Argonne, IL 60439 USA. Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA. MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA. Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. RP Alvine, KJ (reprint author), Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA. EM alvine@fas.harvard.edu RI Stellacci, Francesco/B-1990-2008; Shpyrko, Oleg/J-3970-2012 OI Stellacci, Francesco/0000-0003-4635-6080; NR 36 TC 10 Z9 10 U1 0 U2 11 PU AMERICAN 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 MAR PY 2006 VL 73 IS 12 AR 125412 DI 10.1103/PhysRevB.73.125412 PG 9 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400109 ER PT J AU Antonov, VN Harmon, BN Yaresko, AN Bekenov, LV Shpak, AP AF Antonov, VN Harmon, BN Yaresko, AN Bekenov, LV Shpak, AP TI Spin spirals and X-ray magnetic circular dichroism in IrMnAl: First-principles calculations SO PHYSICAL REVIEW B LA English DT Article ID METALLIC FERROMAGNET NIMNSB; HALF-METALLICITY; GROUND-STATE; ABSORPTION-SPECTROSCOPY; ELECTRONIC-STRUCTURE; FINITE-TEMPERATURE; TRANSITION-METALS; HEUSLER ALLOY; FE; DYNAMICS AB The electronic structure and x-ray magnetic circular dichroism linear muffin-tin orbital spectra of IrMnAl were investigated theoretically from first principles using the fully relativistic Dirac LMTO band structure method. The electronic structure is obtained with the local spin-density approximation. We found that the induced magnetic moment at the Ir site depends strongly on the local environment. An important feature of IrMnAl is a very small magnetic moment on the Mn site of about 0.4 mu(B) which is much smaller than the moment of (2-5)mu(B) found in ferromagnetic Mn compounds with either L2(1) or C1(b) crystal structure. The small value of the net magnetic moment in IrMnAl is associated with the noncollinear magnetic structure and possible Mn intersite disorder. The total energies for different spin spirals are calculated, and the ground-state magnetic structure is identified. In addition, the variation of the magnetic moment as a function of the spiral structure is studied. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany. Inst Met Phys, UA-03142 Kiev, Ukraine. RP Iowa State Univ, Ames Lab, Ames, IA 50011 USA. OI Bekenov, Lev/0000-0003-1839-0134 NR 54 TC 7 Z9 7 U1 1 U2 10 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 MAR PY 2006 VL 73 IS 9 AR 094445 DI 10.1103/PhysRevB.73.094445 PG 10 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100133 ER PT J AU Aryanpour, K Dagotto, ER Mayr, M Paiva, T Pickett, WE Scalettar, RT AF Aryanpour, K Dagotto, ER Mayr, M Paiva, T Pickett, WE Scalettar, RT TI Effect of inhomogeneity on s-wave superconductivity in the attractive Hubbard model SO PHYSICAL REVIEW B LA English DT Article ID THERMODYNAMIC PROPERTIES; SYSTEMS; LOCALIZATION; TRANSITION; DENSITY; STATE AB Inhomogeneous s-wave superconductivity is studied in the two-dimensional, square lattice attractive Hubbard Hamiltonian using the Bogoliubov-de Gennes (BdG) mean field approximation. We find that at weak coupling, and for densities mainly below half-filling, an inhomogeneous interaction in which the on-site interaction U-i takes on two values, U-i=0, 2U results in a larger zero temperature pairing amplitude, and that the superconducting T-c can also be significantly increased, relative to a uniform system with U-i=U on all sites. These effects are observed for stripe, checkerboard, and even random patterns of the attractive centers, suggesting that the pattern of inhomogeneity is unimportant. Monte Carlo calculations which reintroduce some of the fluctuations neglected within the BdG approach see the same effect, both for the attractive Hubbard model and a Hamiltonian with d-wave pairing symmetry. C1 Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Univ Fed Rio de Janeiro, Inst Fis, Dept Fis Solidos, BR-21945970 Rio De Janeiro, RJ, Brazil. RP Aryanpour, K (reprint author), Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. RI Paiva, Thereza/B-9778-2013 OI Paiva, Thereza/0000-0002-4199-3809 NR 30 TC 24 Z9 24 U1 0 U2 3 PU AMERICAN 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 MAR PY 2006 VL 73 IS 10 AR 104518 DI 10.1103/PhysResB.73.104518 PG 5 WC Physics, Condensed Matter SC Physics GA 028DN UT WOS:000236467200120 ER PT J AU Bug, ALR Sterne, PA AF Bug, ALR Sterne, PA TI Path integral Monte Carlo simulations of positronium annihilation: From micropores to mesopores SO PHYSICAL REVIEW B LA English DT Article ID MOLECULAR SUBSTANCES; LIFETIME; POLYMERS; SOLIDS; MODEL; SPECTROSCOPY; COMPUTATION; SYSTEMS AB Path integral Monte Carlo (PIMC) can reproduce the results of simple analytical calculations in which a single quantum particle is used to represent positronium within an idealized spherical pore. Our calculations improve on this approach by explicitly treating the positronium as a two-particle e(-), e(+) system interacting via the Coulomb interaction. We study the lifetime and the internal contact density, kappa, which controls the self-annihilation behavior for positronium in model spherical pores as a function of temperature and pore size. We compare the results with both PIMC and analytical calculations for a single-particle model. C1 Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 USA. NR 42 TC 1 Z9 1 U1 0 U2 3 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 MAR PY 2006 VL 73 IS 9 AR 094106 DI 10.1103/PhysRevB.73.094106 PG 7 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100052 ER PT J AU Choi, HJ Cohen, ML Louie, SG AF Choi, HJ Cohen, ML Louie, SG TI Anisotropic Eliashberg theory and the two-band model for the superconducting properties of MgB2 SO PHYSICAL REVIEW B LA English DT Article ID ENERGY; ORIGIN AB We present a framework for the anisotropic Eliashberg theory for the superconducting properties of MgB2 and reduce the framework to a zeroth-order two-band model by neglecting the variation of the electron-phonon interaction within the sigma and pi sheets, of the Fermi surface. We then derive a second-order-corrected two-band model using a systematic expansion of the theory with respect to the intrasheet variation of the electron-phonon interaction. Our results show that the zeroth-order two-band model reproduces successfully the results of the anisotropic Eliashberg theory with fairly small errors and that, with the second-order corrections, the model coincides with the full theory. The second-order-corrected two-band model reproduces not only the intersheet but also the intrasheet variation of the superconducting energy gap on the Fermi surface. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Korea Inst Adv Study, Seoul 130722, South Korea. Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea. Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. EM h.j.choi@yonsei.ac.kr RI Choi, Hyoung Joon/N-8933-2015 OI Choi, Hyoung Joon/0000-0001-8565-8597 NR 27 TC 22 Z9 22 U1 0 U2 3 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 MAR PY 2006 VL 73 IS 10 AR 104520 DI 10.1103/PhysRevB.73.104520 PG 8 WC Physics, Condensed Matter SC Physics GA 028DN UT WOS:000236467200122 ER PT J AU Chuang, FC Wang, CZ Ho, KH AF Chuang, FC Wang, CZ Ho, KH TI Structure of neutral aluminum clusters Al-n (2 <= n <= 23): Genetic algorithm tight-binding calculations SO PHYSICAL REVIEW B LA English DT Article ID AB-INITIO SIMULATIONS; GEOMETRY OPTIMIZATION; ELECTRONIC-STRUCTURE; METAL-CLUSTERS; BASIS-SET; ANIONS AB We performed global structural optimizations for neutral aluminum clusters Al-n (n up to 23) using a genetic algorithm (GA) coupled with a tight-binding interatomic potential. Structural candidates obtained from our GA search were further optimized by using first-principles total energy calculations. We report the lowest energy structures of neutral Al-n (n=2-23). We found that the icosahedral structure of Al-13 serves as the core for the growth of aluminum clusters from Al-14 to Al-18. C1 US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Chuang, FC (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA. RI Chuang, FengChuan/H-7166-2013; OI Chuang, FengChuan/0000-0003-0351-4253; Wang, Chong/0000-0003-4489-4344 NR 28 TC 76 Z9 83 U1 0 U2 8 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 MAR PY 2006 VL 73 IS 12 AR 125431 DI 10.1103/PhysRevB.73.125431 PG 7 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400128 ER PT J AU Deb, A Ralph, JM Cairns, EJ Bergmann, U AF Deb, A Ralph, JM Cairns, EJ Bergmann, U TI Characterization of La0.8Sr0.2FeO3-delta and La0.7Sr0.2FeO3-delta as a function of temperature by x-ray absorption spectroscopy SO PHYSICAL REVIEW B LA English DT Article ID OXIDE FUEL-CELLS; FINE-STRUCTURE; MAGNETIC-PROPERTIES; CHARGE DISPROPORTIONATION; MULTIPLE-SCATTERING; MOSSBAUER; ORDER; SYSTEM; MANGANITES; CAFEO3 AB A temperature-dependent x-ray absorption spectroscopy (XAS) study was performed to investigate the changes in electronic and atomic structure of La-deficient La0.7Sr0.2FeO3-delta (L7S2FO3) and stoichiometric La0.8Sr0.2FeO3-delta (L8S2FO3). La0.8Sr0.2FeO3-delta is a promising cathode material for intermediate operating temperature (700-800 degrees C) solid oxide fuel cells. Performance improvements have been shown by increasing the La- or A-site deficiency in this material but a clear understanding of the mechanisms responsible for this improvement are still needed. Here we report an x-ray absorption spectroscopy (XAS) study as a function of temperature to investigate electronic and atomic structure changes of La-deficient La0.7Sr0.2FeO3-delta (L7S2FO3) and stoichiometric La0.8Sr0.2FeO3-delta (L8S2FO3). In particular we have measured the temperature-dependent changes in oxidation state, bond distance, Fe coordination number, and oxygen vacancies for both compounds. L7S2FO3 contains 10% A-site vacancies compared to stoichiometric L8S2FO3, which has a fully occupied A site and thus some form of charge compensation is necessary in the former to maintain charge neutrality. X-ray absorption near edge spectroscopy shows the presence of Fe3+ and Fe4+ in both L7S2FO3 and L8S2FO3 (mixed valence) as established by comparison with model compounds. Studies from room temperature to 850 degrees C show that Fe3+ dominates over Fe4+ in both materials with increasing dominance as the temperature is increased. Furthermore, the temperature-dependent study revealed the La-deficiency in L7S2FO3 leads to a higher concentration of both electron holes (i.e., more Fe4+ created) and oxygen vacancies, compared to the stoichiometric L8S2FO3. Analysis of the extended x-ray absorption fine structure shows that the Fe-O bond increases with the increase in temperature for both the systems. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA. Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. RP Deb, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM adeb@slac.stanford.edu RI Deb, Aniruddha/H-7529-2016; Cairns, Elton/E-8873-2012 OI Deb, Aniruddha/0000-0002-0331-9709; Cairns, Elton/0000-0002-1179-7591 NR 44 TC 9 Z9 9 U1 2 U2 9 PU AMERICAN 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 MAR PY 2006 VL 73 IS 11 AR 115114 DI 10.1103/PhysRevB.73.115114 PG 9 WC Physics, Condensed Matter SC Physics GA 028DO UT WOS:000236467300052 ER PT J AU dela Cruz, CR Yen, F Lorenz, B Gospodinov, MM Chu, CW Ratcliff, W Lynn, JW Park, S Cheong, SW AF dela Cruz, CR Yen, F Lorenz, B Gospodinov, MM Chu, CW Ratcliff, W Lynn, JW Park, S Cheong, SW TI Structural anomalies at the magnetic and ferroelectric transitions in RMn2O5 (R=Tb,Dy,Ho) SO PHYSICAL REVIEW B LA English DT Article ID NEUTRON-DIFFRACTION; PHASE-TRANSITIONS; POLARIZATION; YMN2O5 AB Strong anomalies of the thermal expansion coefficients at the magnetic and ferroelectric transitions have been detected in multiferroic RMn2O5. Their correlation with anomalies of the specific heat and the dielectric constant is discussed. The results provide evidence for the magnetic origin of the ferroelectricity mediated by strong spin-lattice coupling in the compounds. Neutron scattering data for HoMn2O5 indicate a spin reorientation at the two low-temperature phase transitions. C1 Univ Houston, Dept Phys, Houston, TX 77204 USA. Univ Houston, TCSUH, Houston, TX 77204 USA. Univ Houston, Dept Phys, Houston, TX 77204 USA. Univ Houston, TCSUH, Houston, TX 77204 USA. Bulgarian Acad Sci, Inst Solid State Phys, BU-1784 Sofia, Bulgaria. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China. NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA. Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA. Rutgers State Univ, Ctr Emergent Mat, Piscataway, NJ 08854 USA. RP dela Cruz, CR (reprint author), Univ Houston, Dept Phys, Houston, TX 77204 USA. RI dela Cruz, Clarina/C-2747-2013; Yen, Fei/C-8713-2015 OI dela Cruz, Clarina/0000-0003-4233-2145; Yen, Fei/0000-0003-2295-3040 NR 20 TC 64 Z9 64 U1 1 U2 19 PU AMERICAN 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 MAR PY 2006 VL 73 IS 10 AR 100406 DI 10.1103/PhysRevB.73.100406 PG 4 WC Physics, Condensed Matter SC Physics GA 028DN UT WOS:000236467200007 ER PT J AU Eich, D Fuchs, O Groh, U Weinhardt, L Fink, R Umbach, E Heske, C Fleszar, A Hanke, W Gross, EKU Bostedt, C Von Buuren, T Franco, N Terminello, LJ Keim, M Reuscher, G Lugauer, H Waag, A AF Eich, D Fuchs, O Groh, U Weinhardt, L Fink, R Umbach, E Heske, C Fleszar, A Hanke, W Gross, EKU Bostedt, C Von Buuren, T Franco, N Terminello, LJ Keim, M Reuscher, G Lugauer, H Waag, A TI Resonant inelastic soft x-ray scattering of Be chalcogenides SO PHYSICAL REVIEW B LA English DT Article ID EXCITATION-ENERGY DEPENDENCE; BAND-STRUCTURE; BERYLLIUM CHALCOGENIDES; ELECTRONIC EXCITATIONS; EMISSION; FLUORESCENCE; ABSORPTION; GRAPHITE; SPECTRA; SOLIDS AB The bulk electronic band structures of BeTe and BeSe have been studied by resonant inelastic soft x-ray scattering (RIXS) at the Be 1s edge. We derive direct and indirect bulk band gaps and observe the coexistence of core excitons and momentum conservation. A quantitative analysis of the coherent spectral fraction gives insight into the femtosecond time scale of the relevant dephasing processes. Experimental results agree very well with calculations based on the Kramers-Heisenberg and density-functional theories. C1 Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA. Univ Wurzburg, D-97074 Wurzburg, Germany. Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA. EM heske@unlv.nevada.edu RI Fink, Rainer/C-5333-2008; Fink, Rainer/F-8365-2010; Weinhardt, Lothar/G-1689-2013 OI Fink, Rainer/0000-0002-6896-4266; Fink, Rainer/0000-0002-6896-4266; NR 30 TC 20 Z9 20 U1 1 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD MAR PY 2006 VL 73 IS 11 AR 115212 DI 10.1103/PhysRevB.73.115212 PG 6 WC Physics, Condensed Matter SC Physics GA 028DO UT WOS:000236467300077 ER PT J AU Fattebert, JL Gygi, F AF Fattebert, JL Gygi, F TI Linear-scaling first-principles molecular dynamics with plane-waves accuracy SO PHYSICAL REVIEW B LA English DT Article ID ELECTRONIC-STRUCTURE CALCULATIONS; DENSITY-FUNCTIONAL-THEORY; NONORTHOGONAL LOCALIZED ORBITALS; SIMULATIONS; WATER AB We propose a real-space finite differences approach for accurate and unbiased O(N) density functional theory molecular dynamics simulations based on a localized orbitals representation of the electronic structure. The discretization error can be reduced systematically by adapting the mesh spacing, while the orbitals truncation error decreases exponentially with the radius of the localization regions. For regions large enough, energy conservation in microcanonical simulations is demonstrated for liquid water. We propose an explanation for the energy drift observed for smaller regions. C1 Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551 USA. RP Fattebert, JL (reprint author), Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, POB 5508, Livermore, CA 94551 USA. NR 25 TC 39 Z9 39 U1 1 U2 12 PU AMERICAN 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 MAR PY 2006 VL 73 IS 11 AR 115124 DI 10.1103/PhysRevB.73.115124 PG 5 WC Physics, Condensed Matter SC Physics GA 028DO UT WOS:000236467300062 ER PT J AU Fritsch, V Thompson, JD Sarrao, JL von Nidda, HAK Eremina, RM Loidl, A AF Fritsch, V Thompson, JD Sarrao, JL von Nidda, HAK Eremina, RM Loidl, A TI Correlation between magnetic frustration and electrical conductivity in RInCu4 compounds (R=Gd-Tm) SO PHYSICAL REVIEW B LA English DT Article ID VALENCE PHASE-TRANSITION; SPIN RESONANCE; YBXIN1-XCU2; YBINCU4; METALS; STATE; IONS; GD3+; ESR AB RInCu4-compounds (R=Gd-Tm) are geometrically frustrated antiferromagnets due to the R-ions forming tetrahedra on a fcc-lattice [V. Fritsch , Phys. Rev. B 71, 132401 (2005)]. Replacing In with Cd yields a strongly increased Neel temperature, while the Weiss temperature retains its original order of magnitude. Thus the frustration vanishes, though the original tetrahedral configuration of the rare-earth spins persists. While the RInCu4 compounds exhibit a very low electrical conductivity and the relevant magnetic interactions in those systems are short-range interactions, in RCdCu4 an enhanced conductivity is observed. Here, conduction electron mediated long-range interactions are introduced into the system, which relieve the frustration. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Karlsruhe, Inst Phys, D-76128 Karlsruhe, Germany. Univ Augsburg, Ctr Elect Correlat & Magnetism, D-86135 Augsburg, Germany. EK Zavoisky Phys Tech Inst, Kazan 420029, Russia. RP Fritsch, V (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RI Loidl, Alois/L-8199-2015; Fritsch, Veronika/P-1352-2016 OI Loidl, Alois/0000-0002-5579-0746; Fritsch, Veronika/0000-0002-6620-4554 NR 20 TC 11 Z9 11 U1 2 U2 7 PU AMERICAN 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 MAR PY 2006 VL 73 IS 9 AR 094413 DI 10.1103/PhysRevB.73.094413 PG 7 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100101 ER PT J AU Fujimori, S Terai, K Takeda, Y Okane, T Saitoh, Y Muramatsu, Y Fujimori, A Yamagami, H Tokiwa, Y Ikeda, S Matsuda, TD Haga, Y Yamamoto, E Onuki, Y AF Fujimori, S Terai, K Takeda, Y Okane, T Saitoh, Y Muramatsu, Y Fujimori, A Yamagami, H Tokiwa, Y Ikeda, S Matsuda, TD Haga, Y Yamamoto, E Onuki, Y TI Itinerant U 5f band states in the layered compound UFeGa5 observed by soft x-ray angle-resolved photoemission spectroscopy SO PHYSICAL REVIEW B LA English DT Article ID ELECTRONIC-STRUCTURE; FERMI-SURFACE; SYSTEMS AB We have performed angle-resolved photoemission spectroscopy experiments on paramagnetic UFeGa5 using soft x-ray synchrotron radiation (h nu=500 eV) and derived the bulk- and U 5f-sensitive electronic structure of UFeGa5. Although the agreement between the experimental band structure and the local density approximation calculation treating U 5f electrons as being itinerant is qualitative, the morphology of the Fermi surface is well-explained by the calculation, suggesting that the U 5f states can be essentially understood within the itinerant-electron model. C1 Japan Atom Energy Agcy, Synchrotron Radiat Res Unit, Sayo, Hyogo 6795148, Japan. Univ Tokyo, Dept Complex Sci & Engn, Kashiwa, Chiba 2778561, Japan. Kyoto Sangyo Univ, Fac Sci, Dept Phys, Kyoto 6038555, Japan. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan. Osaka Univ, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan. RP Fujimori, S (reprint author), Japan Atom Energy Agcy, Synchrotron Radiat Res Unit, Sayo, Hyogo 6795148, Japan. RI Tokiwa, Yoshifumi/P-6593-2015 OI Tokiwa, Yoshifumi/0000-0002-6294-7879 NR 20 TC 19 Z9 19 U1 0 U2 4 PU AMERICAN 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 MAR PY 2006 VL 73 IS 12 AR 125109 DI 10.1103/PhysRevB.73.125109 PG 6 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400026 ER PT J AU Goupalov, SV Satishkumar, BC Doorn, SK AF Goupalov, SV Satishkumar, BC Doorn, SK TI Excitation and chirality dependence of the exciton-phonon coupling in carbon nanotubes SO PHYSICAL REVIEW B LA English DT Article AB Based on the empirical nearest-neighbor tight-binding model, we predict that the dependence of the cross section of the resonance Raman scattering from the radial breathing mode of a carbon nanotube multiplied by the fourth power of the nanotube radius is a quadratic function of a newly introduced parameter characterizing nanotube chirality. This dependence reflects the dependence of the exciton-phonon coupling matrix element on the nanotube radius and chiral angle. We perform Raman scattering measurements on nanotubes in solution and confirm the predicted parabolic dependence assuming a close-to-uniform distribution of chiral angles in nanotube samples. The deviation of the experimental points from the parabola provides information about chirality distribution of nanotubes in a sample, which opens new horizons in characterization of samples containing nanotubes of different chiralities. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia. Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. RP Goupalov, SV (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA. NR 19 TC 33 Z9 33 U1 0 U2 7 PU AMERICAN 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 MAR PY 2006 VL 73 IS 11 AR 115401 DI 10.1103/PhysRevB.73.115401 PG 6 WC Physics, Condensed Matter SC Physics GA 028DO UT WOS:000236467300121 ER PT J AU Guo, Y Qu, ZH Zhang, ZY AF Guo, Y Qu, ZH Zhang, ZY TI Lyapunov stability and precise control of the frictional dynamics of a one-dimensional particle array SO PHYSICAL REVIEW B LA English DT Article ID FRENKEL-KONTOROVA MODEL; STICK-SLIP MOTION AB Using Lyapunov theory and numerical simulations, we analyze the local stability of an array of mechanically coupled particles whose frictional dynamics is described by the Frenkel-Kontorova model, and design feedback controls to precisely control the friction. We first establish the asymptotic stability of the system around the equilibrium positions of the particles. We then show how to construct efficient feedback control laws to achieve any predestined average velocity of the particle array, with no fluctuation, and irrespective of the detailed nature of the interparticle coupling. These rigorous results are supported in extensive numerical simulations, and are expected to be applicable to other related physical systems as well. C1 Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA. Univ Cent Florida, Dept Elect & Comp Engn, Orlando, FL 32816 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RP Guo, Y (reprint author), Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA. NR 19 TC 13 Z9 13 U1 1 U2 3 PU AMERICAN 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 MAR PY 2006 VL 73 IS 9 AR 094118 DI 10.1103/PhysRevB.73.094118 PG 5 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100064 ER PT J AU Hamilton, JC AF Hamilton, JC TI Edge energies: Atomistic calculations of a continuum quantity SO PHYSICAL REVIEW B LA English DT Article ID GROWTH; SHAPES; ISLANDS AB Controlling the properties of self-assembled nanostructures requires controlling their shape. Size-dependent shape transitions, frequently observed at nanolength scales, are commonly attributed to edge energy effects. To rigorously test such theories against experiment, quantitative atomistic calculations of edge energies are essential, yet none exist. I describe a fundamental ambiguity in the atomistic definition of edge energies, propose a definition based on equimolar dividing surfaces, and present an atomistic calculation of edge energies for Pd clusters. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Hamilton, JC (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. NR 14 TC 17 Z9 17 U1 1 U2 13 PU AMERICAN 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 MAR PY 2006 VL 73 IS 12 AR 125447 DI 10.1103/PhysRevB.73.125447 PG 7 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400144 ER PT J AU Hancock, JN McKnew, T Schlesinger, Z Sarrao, JL Fisk, Z AF Hancock, JN McKnew, T Schlesinger, Z Sarrao, JL Fisk, Z TI Infrared dynamics of YbIn1-xAgxCu4: Kondo scaling, sum rules, and temperature dependence SO PHYSICAL REVIEW B LA English DT Article ID 1ST-ORDER VALENCE TRANSITION; PERIODIC ANDERSON MODEL; MEAN-FIELD THEORY; PHASE-TRANSITION; MAGNETIC-SUSCEPTIBILITY; TRANSPORT-PROPERTIES; INFINITE DIMENSIONS; FERMION SYSTEMS; YB COMPOUNDS; YBINCU4 AB We present an infrared/optical study of the dynamics of the strongly correlated electron system YbIn1-xAgxCu4 as a function of composition and temperature for x ranging from 0 to 1, and T between 20 and 300 K. YbIn1-xAgxCu4 evolves from a mixed-valent system at low x to a heavy-Fermion system at high x, and exhibits an unusual electronic phase transition in the low x region. This paper reveals information about the unusual phase transition as well as the phases themselves. Scaling relations emerge from the data and are investigated in detail using a periodic Anderson model based calculation. We also explore the temperature dependence of sigma(1)(omega) and the infrared sum rule behavior, and provide a picture in which to view both the low- and high-energy x-dependent features of the infrared data. C1 Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. RP Hancock, JN (reprint author), Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA. EM jhancock@stanford.edu RI Hancock, Jason/F-4694-2010 NR 56 TC 13 Z9 13 U1 0 U2 5 PU AMERICAN 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 MAR PY 2006 VL 73 IS 12 AR 125119 DI 10.1103/PhysRevB.73.125119 PG 13 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400036 ER PT J AU He, JQ Vasco, E Dittmann, R Wang, RH AF He, JQ Vasco, E Dittmann, R Wang, RH TI Growth dynamics and strain relaxation mechanisms in BaTiO3 pulsed laser deposited on SrRuO3/SrTiO3 SO PHYSICAL REVIEW B LA English DT Article ID MISFIT DISLOCATIONS; THIN-FILMS; MICROSTRUCTURE; INTERFACES; CRYSTALS; NANOSTRUCTURES; ACCOMMODATION; PARAMETERS; STABILITY AB The atomic structure of epitaxial BaTiO3 films grown on SrRuO3-covered (001)SrTiO3 substrates by pulsed laser deposition has been studied by transmission electron microscopy. It revealed a three-layered structure, each layer with a different morphology, remaining strain, and density of defects. These results pointed to the existence of two growth regimes with distinctive strain-relaxation mechanisms: (i) A first dislocation-free layer extending 3 nm from the coherent interface with SrRuO3. (ii) Beyond it, a second 7 nm thick semicoherent layer exhibiting a high density of misfit dislocations with a Burger vector a < 010 >. The structures of both layers are the outcome of a two-dimensional layer-by-layer growth regime. (iii) A third layer extending throughout the rest of the BaTiO3 film, showing a columnar structure of stoichiometric grains encapsulated by amorphous Ti-enriched boundaries, as disclosed by energy-dispersive x-ray spectroscopy. The structure of this third layer reflects its three-dimensional-featured growth habit. By considering both regimes as a single mode, the growth dynamics of the BaTiO3 films is discussed in relation to strain-relaxation mechanisms potentially responsible for the Stranski-Krastanov growth mode of this system. C1 Forschungszentrum Julich GmbH, Inst Festkorperforsch, D-52425 Julich, Germany. CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain. Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China. Wuhan Univ, Ctr Elect Microscopy, Wuhan 430072, Peoples R China. RP He, JQ (reprint author), Brookhaven Natl Lab, Ctr Funct Nanomat, Bldg 480, Upton, NY 11973 USA. RI He, Jiaqing/A-2245-2010; Dittmann, Regina/J-9458-2013 OI Dittmann, Regina/0000-0003-1886-1864 NR 31 TC 33 Z9 33 U1 1 U2 20 PU AMERICAN 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 MAR PY 2006 VL 73 IS 12 AR 125413 DI 10.1103/PhysRevB.73.125413 PG 7 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400110 ER PT J AU He, LX Zunger, A AF He, LX Zunger, A TI Multiple charging of InAs/GaAs quantum dots by electrons or holes: Addition energies and ground-state configurations SO PHYSICAL REVIEW B LA English DT Article ID SPECTROSCOPY; PSEUDOPOTENTIALS; EMISSION; MODEL; INP AB Atomistic pseudopotential plus configuration interaction calculations of the energy needed to charge dots by either electrons or holes are described, and contrasted with the widely used, but highly simplified two-dimensional parabolic effective mass approximation (2D-EMA). Substantial discrepancies are found, especially for holes, regarding the stable electronic configuration and filling sequence which defies both Hund's rule and the Aufbau principle. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP He, LX (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. RI Zunger, Alex/A-6733-2013 NR 45 TC 26 Z9 27 U1 0 U2 2 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 MAR PY 2006 VL 73 IS 11 AR 115324 DI 10.1103/PhysRevB.73.115324 PG 14 WC Physics, Condensed Matter SC Physics GA 028DO UT WOS:000236467300101 ER PT J AU Heffner, RH Morris, GD Fluss, MJ Chung, B McCall, S MacLaughlin, DE Shu, L Ohishi, K Bauer, ED Sarrao, JL Higemoto, W Ito, TU AF Heffner, RH Morris, GD Fluss, MJ Chung, B McCall, S MacLaughlin, DE Shu, L Ohishi, K Bauer, ED Sarrao, JL Higemoto, W Ito, TU TI Limits for ordered magnetism in Pu from muon spin rotation spectroscopy SO PHYSICAL REVIEW B LA English DT Article ID DELTA-PU; ELECTRONIC-STRUCTURE; ALPHA-PU; RELAXATION; PLUTONIUM; METALS; ANTIFERROMAGNETICS; IMPURITIES; FIELD; AUFE AB We present mu SR measurements on Pu metal which set stringent upper limits on the magnitude of the ordered moments mu(ord) in alpha-Pu and delta-stabilized Pu (alloyed with 4.3 at.% Ga). The magnitude of the low-temperature (4 K < T < 100-150 K) mu SR rate in zero applied field is independent of temperature and consistent with nuclear dipolar broadening alone. The Knight shift in alpha-Pu in 2 T applied field is also independent of temperature below about 100 K, but increases abruptly at higher temperatures, an effect likely caused by muon diffusion to paramagnetic impurities. A rough estimate for the muon hopping rate 1/tau(h) at 150 K in alpha-Pu yields 1/tau(h)approximate to 3x10(7) s(-1); no estimate is yet obtained for delta-Pu. The principal results reported here are limits for mu(ord) in both alpha- and delta-Pu <= 10(-3)mu(B) at T congruent to 4 K. These limits are discussed in terms of recent models of the electronic properties of delta-Pu, where magnetism has been previously predicted. Our results are consistent with, but cannot unambiguously distinguish between, cases where the moments in delta-Pu are essentially zero, possess very weak interatomic exchange, are reduced by hybridization, or are washed out by dynamical fluctuations. C1 Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. TRIUMF, Vancouver, BC V6T 2A3, Canada. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA. Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan. RP Heffner, RH (reprint author), Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan. RI Ohishi, Kazuki/E-9592-2010; Bauer, Eric/D-7212-2011; Shu, Lei/E-7524-2012; Chung, Brandon/G-2929-2012; McCall, Scott/G-1733-2014; OI Ohishi, Kazuki/0000-0003-1494-6502; McCall, Scott/0000-0002-7979-4944; Ito, Takashi/0000-0003-1971-4313; Bauer, Eric/0000-0003-0017-1937 NR 23 TC 27 Z9 27 U1 2 U2 11 PU AMERICAN 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 MAR PY 2006 VL 73 IS 9 AR 094453 DI 10.1103/PhysRevB.73.094453 PG 5 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100141 ER PT J AU Howell, RC Proffen, T Conradson, SD AF Howell, RC Proffen, T Conradson, SD TI Pair distribution function and structure factor of spherical particles SO PHYSICAL REVIEW B LA English DT Article ID X-RAY; NEUTRON-DIFFRACTION; POWDER DIFFRACTION; TOTAL SCATTERING; NANOPARTICLES; REFINEMENT; ELECTRON; CRYSTALS; ORDER; SIZE AB The availability of neutron spallation-source instruments that provide total scattering powder diffraction has led to an increased application of real-space structure analysis using the pair distribution function. Currently, the analytical treatment of finite size effects within pair distribution refinement procedures is limited. To that end, an envelope function is derived which transforms the pair distribution function of an infinite solid into that of a spherical particle with the same crystal structure. Distributions of particle sizes are then considered, and the associated envelope function is used to predict the particle size distribution of an experimental sample of gold nanoparticles from its pair distribution function alone. Finally, complementing the wealth of existing diffraction analysis, the peak broadening for the structure factor of spherical particles, expressed as a convolution derived from the envelope functions, is calculated exactly for all particle size distributions considered, and peak maxima, offsets, and asymmetries are discussed. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Lujan Neutron Scattering Ctr, Los Alamos, NM 87545 USA. RP Howell, RC (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. EM rhowell@lanl.gov; tproffen@lanl.gov; conradson@lanl.gov RI Lujan Center, LANL/G-4896-2012; Proffen, Thomas/B-3585-2009 OI Proffen, Thomas/0000-0002-1408-6031 NR 21 TC 31 Z9 31 U1 5 U2 24 PU AMERICAN 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 MAR PY 2006 VL 73 IS 9 AR 094107 DI 10.1103/PhysRevB.73.094107 PG 7 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100053 ER PT J AU Hurley, DH Wright, OB Matsuda, O Suzuki, T Tamura, S Sugawara, Y AF Hurley, DH Wright, OB Matsuda, O Suzuki, T Tamura, S Sugawara, Y TI Time-resolved surface acoustic wave propagation across a single grain boundary SO PHYSICAL REVIEW B LA English DT Article ID LASER-GENERATED ULTRASOUND; MICROSTRUCTURE; MICROSCOPY; SCATTERING; CRYSTALS; LINE AB Using an optical technique, we present time-resolved measurements of high frequency surface acoustic waves propagating across the boundary between two single crystals. The choice of the elastically anisotropic cubic crystal copper allows the observation of anisotropic surface acoustic propagation with cuspidal wave fronts together with refraction in the presence of significant orientation mismatch. The effect of the subsurface grain boundary angle on the transmitted acoustic field is revealed. C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA. Hokkaido Univ, Dept Appl Phys, Grad Sch Engn, Sapporo, Hokkaido 0608628, Japan. Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England. RP Hurley, DH (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. RI Matsuda, Osamu/A-7193-2012 OI Matsuda, Osamu/0000-0002-0736-1242 NR 28 TC 10 Z9 10 U1 1 U2 12 PU AMERICAN 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 MAR PY 2006 VL 73 IS 12 AR 125403 DI 10.1103/PhysRevB.73.125403 PG 6 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400100 ER PT J AU Kaneshita, E Martin, I Bishop, AR AF Kaneshita, E Martin, I Bishop, AR TI Pressure-induced phase transition and bipolaronic sliding in a hole-doped Cu2O3-ladder system SO PHYSICAL REVIEW B LA English DT Article ID LADDER; SR14-XCAXCU24O41; STATES; SUPERCONDUCTIVITY; SPECTROSCOPY; SR14CU24O41; MODEL AB We study a hole-doped two-leg ladder system including metal ions, oxygen, and electron-lattice interaction, as a model for Sr14-xCaxCu24O41-delta . Single- and bipolaronic states at 1/4-hole doping are modeled as functions of pressure by applying an unrestricted Hartree-Fock approximation to a multiband Peierls-Hubbard Hamiltonian. We find evidence for a pressure-induced phase transition between single-polaron and bipolaron lattices. The electronic and phononic excitations in those states, including distinctive local lattice vibrational modes, are calculated by means of a direct-space random phase approximation. Finally, as a function of pressure, we identify a transition between site- and bond-centered bipolarons, accompanied by a soft mode and a low-energy charge-sliding mode. We suggest comparisons with available experimented data. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Kaneshita, E (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 23 TC 1 Z9 1 U1 1 U2 5 PU AMERICAN 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 MAR PY 2006 VL 73 IS 9 AR 094514 DI 10.1103/PhysRevB.73.094514 PG 10 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100158 ER PT J AU Leite, MS Gray, JL Hull, R Floro, JA Magalhaes-Paniago, R Medeiros-Ribeiro, G AF Leite, MS Gray, JL Hull, R Floro, JA Magalhaes-Paniago, R Medeiros-Ribeiro, G TI X-ray diffraction mapping of strain fields and chemical composition of SiGe : Si(001) quantum dot molecules SO PHYSICAL REVIEW B LA English DT Article ID NUCLEATION; GROWTH; SI(001); FILMS; GE; EVOLUTION; ISLANDS; SURFACE AB A variety of surface morphologies can be formed by controlling kinetic parameters during heteroepitaxial film growth. The system reported is a Si0.7Ge0.3 film grown by molecular beam epitaxy at 550 degrees C and a 1 A/s deposition rate, producing quantum dot molecule (QDM) structures. These nanostructures are very uniform in size and shape, allowing strain mapping and chemical composition evaluation by means of anomalous x-ray diffraction in a grazing incidence geometry. Tensile and compressed regions coexist inside QDMs, in accordance with the finite-element calculations of lattice relaxation. The Ge content was found to vary significantly within the structures, and to be quite different from the nominal composition. C1 Lab Nacl Luz Sincrotron, BR-13084971 Campinas, SP, Brazil. Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil. Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22903 USA. Sandia Natl Labs, Livermore, CA 94550 USA. UFMG, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil. RP Leite, MS (reprint author), Lab Nacl Luz Sincrotron, Caixa Postal 6192, BR-13084971 Campinas, SP, Brazil. RI medeiros ribeiro, gilberto/E-1835-2012; Inst. of Physics, Gleb Wataghin/A-9780-2017 NR 20 TC 10 Z9 10 U1 0 U2 6 PU AMERICAN 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 MAR PY 2006 VL 73 IS 12 AR 121308 DI 10.1103/PhysRevB.73.121308 PG 4 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400013 ER PT J AU Li, MZ Evans, JW AF Li, MZ Evans, JW TI Mound slope and shape selection during unstable multilayer growth: Analysis of step-dynamics models including downward funneling SO PHYSICAL REVIEW B LA English DT Article ID MOLECULAR-BEAM EPITAXY; THIN-FILM GROWTH; CRYSTAL-GROWTH; TEMPERATURE; HOMOEPITAXY; INSTABILITY; ROUGHNESS; SURFACES; DECAY; NUCLEATION AB Step-dynamics models are developed for mound shape evolution during multilayer homoepitaxial growth in the presence of inhibited interlayer transport. Unconventionally, our models also incorporate downward funneling (DF) of atoms deposited at step edges. The extent of DF can be reduced continuously to zero where one recovers traditional step dynamics models. This allows direct comparison between the behavior of models with and without DF. We show that DF greatly enhances growth of the height of valleys at the mound bases to an extent compatible with slope selection. To elucidate the selected shapes of finite mounds, we consider a suitably defined net flux of adatom attachment at steps summed over a mound side between valley and peak. This quantity varies periodically but vanishes when further averaged over time, a condition which directly constrains the selected mound shapes. We also characterize the dependence of these shapes on the prescription of nucleation of new islands at the mound peak. C1 Iowa State Univ, Inst Phys Res & Technol, Ames, IA 50011 USA. Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Math, Ames, IA 50011 USA. RP Li, MZ (reprint author), Iowa State Univ, Inst Phys Res & Technol, Ames, IA 50011 USA. NR 55 TC 9 Z9 9 U1 1 U2 7 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 MAR PY 2006 VL 73 IS 12 AR 125434 DI 10.1103/PhysRevB.73.125434 PG 13 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400131 ER PT J AU Lin, JF Gavriliuk, AG Struzhkin, VV Jacobsen, SD Sturhahn, W Hu, MY Chow, P Yoo, CS AF Lin, JF Gavriliuk, AG Struzhkin, VV Jacobsen, SD Sturhahn, W Hu, MY Chow, P Yoo, CS TI Pressure-induced electronic spin transition of iron in magnesiowustite-(Mg,Fe)O SO PHYSICAL REVIEW B LA English DT Article ID RAY-EMISSION SPECTROSCOPY; EARTHS LOWER MANTLE; METAL OXIDES; SHEAR-WAVES; FEO; FLUORESCENCE; CHEMISTRY; MOSSBAUER; MAGNETISM; COLLAPSE AB An electronic transition of iron in magnesiowustite has been studied with synchrotron Mossbauer and x-ray emission spectroscopies under high pressures. Synchrotron Mossbauer studies show that the quadrupole splitting disappears and the isomer shift drops significantly across the spin-paring transition of iron in (Mg-0.75,Fe-0.25)O between 52 and 70 GPa. Based upon current results and percolation theory, we reexamine the high-pressure phase diagram of (Mg,Fe)O and find that iron-iron exchange interaction plays an important role in stabilizing the high-spin state of iron in FeO-rich (Mg,Fe)O. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA. Inst High Pressure Phys, Troitsk 142190, Moscow Oblast, Russia. Russian Acad Sci, Inst Crystallog, Moscow 117333, Russia. Argonne Natl Lab, Adv Photon Source, HPCAT, Argonne, IL 60439 USA. RP Lin, JF (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94550 USA. RI Lin, Jung-Fu/B-4917-2011; Struzhkin, Viktor/J-9847-2013; Jacobsen, Steven/F-3443-2013; Gavriliuk, Alexander/G-1317-2011 OI Struzhkin, Viktor/0000-0002-3468-0548; Jacobsen, Steven/0000-0002-9746-958X; Gavriliuk, Alexander/0000-0003-0604-586X NR 28 TC 48 Z9 48 U1 3 U2 15 PU AMERICAN 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 MAR PY 2006 VL 73 IS 11 AR 113107 DI 10.1103/PhysRevB.73.113107 PG 4 WC Physics, Condensed Matter SC Physics GA 028DO UT WOS:000236467300007 ER PT J AU Mihut, I Agosta, CC Martin, C Mielke, CH Coffey, T Tokumoto, M Kurmoo, M Schlueter, JA Goddard, P Harrison, N AF Mihut, I Agosta, CC Martin, C Mielke, CH Coffey, T Tokumoto, M Kurmoo, M Schlueter, JA Goddard, P Harrison, N TI Incoherent Bragg reflection and Fermi-surface hot spots in a quasi-two-dimensional metal SO PHYSICAL REVIEW B LA English DT Article ID HAAS-VAN-ALPHEN; HIGH MAGNETIC-FIELDS; ORGANIC SUPERCONDUCTOR KAPPA-(BEDT-TTF)2CU(NCS)2; EFFECTIVE-MASS; KAPPA-(BEDT-TTF)(2)CU(NCS)(2); SCATTERING; OSCILLATIONS; TEMPERATURE; ANISOTROPY; BREAKDOWN AB We propose a mechanism whereby a finite correlation length associated with the periodicity of the crystalline lattice gives rise to incoherent Bragg reflection of quasiparticles. This introduces an additional effective scattering rate tau(-1)(hot)[k(F)] that selectively damps quantum oscillations originating from orbits that are the product of Bragg reflection. The model is applied to the dimerization in kappa-(BEDT-TTF)(2)Cu(NCS)(2) where we show that tau(-1)(hot)[k(F)] is strongly dependent on the Fermi momentum k(F), being concentrated at "hot spots" located on the Brillouin zone boundary. C1 Clark Univ, Dept Phys, Worcester, MA 01610 USA. LANL, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA. AIST, Nanotechnol Res Inst, Tsukuba, Ibaraki 9058568, Japan. UCL Royal Inst Great Britain, London W1X 4BS, England. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Mihut, I (reprint author), Clark Univ, Dept Phys, 950 Main St, Worcester, MA 01610 USA. RI Stroe, Izabela/B-3790-2010; Goddard, Paul/A-8638-2015; OI Goddard, Paul/0000-0002-0666-5236; Harrison, Neil/0000-0001-5456-7756 NR 22 TC 4 Z9 4 U1 0 U2 1 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 MAR PY 2006 VL 73 IS 12 AR 125118 DI 10.1103/PhysRevB.73.125118 PG 4 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400035 ER PT J AU Na-Phattalung, S Smith, MF Kim, K Du, MH Wei, SH Zhang, SB Limpijumnong, S AF Na-Phattalung, S Smith, MF Kim, K Du, MH Wei, SH Zhang, SB Limpijumnong, S TI First-principles study of native defects in anatase TiO2 SO PHYSICAL REVIEW B LA English DT Article ID AB-INITIO CALCULATIONS; RUTILE TIO2-X; N-TYPE; SEMICONDUCTORS; DIFFUSION; ENERGIES; CRYSTALS; GAAS AB Native point defects in anatase TiO2 are investigated by using first-principles pseudopotential calculations based on density-functional theory (DFT). Antisite defects, namely, Ti-antisite (Ti-O) and O-antisite (O-Ti), have high formation energies and are hence unstable. In contrast, all other fundamental native defects (Ti-i, O-i, V-Ti, and V-O) have low formation energies. In particular, titanium interstitial (Ti-i) is a quadruple donor defect with lowest formation energy in p-type samples, whereas Ti vacancy (V-Ti) is a quadruple acceptor defect with lowest formation energy in n-type samples. Interstitial oxygen (O-i) would spontaneously and strongly bind to lattice oxygen, resulting in a neutral O-2 dimer substituting on one O site. None of the four low-energy defects have energy levels inside the DFT band gap. C1 Natl Synchrotron Res Ctr, Nakhon Ratchasima, Thailand. Suranaree Univ Technol, Sch Phys, Nakhon Ratchasima, Thailand. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Na-Phattalung, S (reprint author), Natl Synchrotron Res Ctr, Nakhon Ratchasima, Thailand. RI Du, Mao-Hua/B-2108-2010; Krausnick, Jennifer/D-6291-2013; Zhang, Shengbai/D-4885-2013 OI Du, Mao-Hua/0000-0001-8796-167X; Zhang, Shengbai/0000-0003-0833-5860 NR 28 TC 172 Z9 176 U1 14 U2 136 PU AMERICAN 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 MAR PY 2006 VL 73 IS 12 AR 125205 DI 10.1103/PhysRevB.73.125205 PG 6 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400045 ER PT J AU Niklowitz, PG Knebel, G Flouquet, J Bud'ko, SL Canfield, PC AF Niklowitz, PG Knebel, G Flouquet, J Bud'ko, SL Canfield, PC TI Field-induced non-Fermi-liquid resistivity of stoichiometric YbAgGe single crystals SO PHYSICAL REVIEW B LA English DT Article ID QUANTUM CRITICAL-POINT; INELASTIC NEUTRON-SCATTERING; PHASE-TRANSITION; LOW-TEMPERATURES; COMPOUND YBAGGE; METALS; MAGNETORESISTANCE; SR3RU2O7; ELECTRON; CERU2SI2 AB We have investigated hexagonal YbAgGe down to 70 mK by measuring the magnetic-field and temperature dependence of the resistivity rho of single crystals in fields up to 14 T. Our results extend the H-T phase diagram to the lowest temperatures for H applied in the basal plane and along the c axis. In particular, critical fields for the suppression of several magnetic phases are determined. The temperature dependence of rho(T) is unusual: whereas at low H, rho(T) reveals a temperature exponent n >= 2, we find 1 <= n < 1.5 and strong enhancement of the temperature dependence of rho(T) close to and beyond the highest critical field for each field direction. For H applied in the basal plane, at high fields a conventional T-2 dependence of rho(T) is reached above 10 T accompanied by an approach to saturation of a strong drop in the residual resistivity. YbAgGe appears to be one of few Yb-based stoichiometric systems, where quantum-critical behavior may be induced by a magnetic field. C1 CEA, SPSMS, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP CEA, SPSMS, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France. EM niklowit@drfmc.ceng.cea.fr RI Knebel, Georg/A-3294-2012; Canfield, Paul/H-2698-2014 NR 37 TC 25 Z9 25 U1 1 U2 6 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 MAR PY 2006 VL 73 IS 12 AR 125101 DI 10.1103/PhysRevB.73.125101 PG 9 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400018 ER PT J AU Patil, SKR Khare, SV Tuttle, BR Bording, JK Kodambaka, S AF Patil, SKR Khare, SV Tuttle, BR Bording, JK Kodambaka, S TI Mechanical stability of possible structures of PtN investigated using first-principles calculations SO PHYSICAL REVIEW B LA English DT Article ID TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; PLATINUM NITRIDE; PSEUDOPOTENTIALS; METALS AB We report an ab initio study of the mechanical stability of platinum nitride (PtN), in four different crystal structures, the rock salt (rs-PtN), zinc-blende (zb-PtN), cooperite, and a face-centered orthorhombic phase. Of these phases only the rs-PtN phase is found to be stable and has the highest bulk modulus B=284 GPa. Its electronic density of states shows no band gap making it metallic. The zb-PtN phase does not stabilize or harden by the nitrogen vacancies investigated in this study. Therefore, the experimental observation of super hardness in PtN remains a puzzle. C1 Univ Toledo, Dept Mech Engn, Toledo, OH 43606 USA. Univ Toledo, Dept Phys & Astron, Toledo, OH 43606 USA. Penn State Univ, Behrend Coll, Sch Sci, Erie, PA 16513 USA. Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. TJ Watson Res Ctr, IBM Res Div, Yorktown Hts, NY 10598 USA. RP Univ Toledo, Dept Mech Engn, Toledo, OH 43606 USA. EM khare@physics.utoledo.edu NR 35 TC 99 Z9 102 U1 1 U2 18 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD MAR PY 2006 VL 73 IS 10 AR 104118 DI 10.1103/PhysRevB.73.104118 PG 8 WC Physics, Condensed Matter SC Physics GA 028DN UT WOS:000236467200034 ER PT J AU Posselt, M Gao, F Weber, WJ AF Posselt, M Gao, F Weber, WJ TI Atomistic simulations on the thermal stability of the antisite pair in 3C-and 4H-SiC SO PHYSICAL REVIEW B LA English DT Article ID MOLECULAR-DYNAMICS; ELECTRONIC-STRUCTURE; DEFECT PROPERTIES; AB-INITIO; PHOTOLUMINESCENCE; ENERGETICS; DIFFUSION; ENERGIES; SILICON AB The thermal stability of the first-neighbor antisite pair configurations in 3C- and 4H-SiC is investigated by atomic-level computer simulations. First, the structure and energetics of these defects are determined in order to check the accuracy of the interatomic potential employed. The results are comparable to literature data obtained by the density-functional theory. Then, the lifetime of the antisite pair configurations is calculated for temperatures between 800 and 2500 K. Both in 3C- and 4H-SiC, the thermal stability of the antisite pairs is rather low. Therefore, in contrast to previous theoretical interpretations, the antisite pair cannot be correlated with the D-I photoluminescence center that is stable to above 2000 K. The atomic mechanism of the recombination of the antisite pair in 3C-SiC and of three antisite pair configurations in 4H-SiC is a modified concerted exchange. Because of the different sizes of the silicon and carbon atoms, this process is not identical to the concerted exchange in Si. Two intermediate metastable configurations found during the recombination are similar to the bond defect in Si. Since the SiC lattice contains two types of atoms, there are also two different types of bond defects. The two bond defects can be considered as the result of the incomplete recombination of a carbon vacancy and a neighboring mixed dumbbell interstitial. The antisite pair in 4H-SiC with the two atoms on hexagonal sites has a slightly higher formation energy than the other three antisite pair configurations in 4H-SiC. Its lifetime shows another dependence on the temperature, and its recombination is characterized by a separate motion of atoms. The comparison to results obtained by molecular dynamics simulations that are based on the density-functional theory demonstrates that the atomistic simulations describe the antisite pair and its recombination reasonably well. C1 Forschungszentrum Rossendorf EV, Inst Ion Beam Phys & Mat Res, D-01314 Dresden, Germany. Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. RP Posselt, M (reprint author), Forschungszentrum Rossendorf EV, Inst Ion Beam Phys & Mat Res, POB 510119, D-01314 Dresden, Germany. EM M.Posselt@fzrossendorf.de RI Weber, William/A-4177-2008; Gao, Fei/H-3045-2012 OI Weber, William/0000-0002-9017-7365; NR 27 TC 12 Z9 12 U1 0 U2 10 PU AMERICAN 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 MAR PY 2006 VL 73 IS 12 AR 125206 DI 10.1103/PhysRevB.73.125206 PG 8 WC Physics, Condensed Matter SC Physics GA 028DP UT WOS:000236467400046 ER PT J AU Rodriguez, JP Maley, MP AF Rodriguez, JP Maley, MP TI Collective pinning of imperfect vortex lattices by material line defects in extreme type-II superconductors SO PHYSICAL REVIEW B LA English DT Article ID YBA2CU3O7 COATED CONDUCTORS; THIN-FILMS; COLUMNAR DEFECTS AB The critical current density shown by a superconductor at the extreme type-II limit is predicted to follow a 1/root B power law with external magnetic field B if the vortex lattice is weakly pinned by material line defects. It acquires an additional inverse dependence with thickness along the line direction once pinning of the interstitial vortex lines by material point defects is included. Moderate quantitative agreement with the critical current density shown by second-generation wires of high-temperature superconductors in kG magnetic fields is achieved at liquid-nitrogen temperature. C1 Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA. RP Rodriguez, JP (reprint author), Los Alamos Natl Lab, Superconduct Technol Ctr, POB 1663, Los Alamos, NM 87545 USA. NR 24 TC 4 Z9 4 U1 0 U2 1 PU AMERICAN 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 MAR PY 2006 VL 73 IS 9 AR 094502 DI 10.1103/PhysRevB.73.094502 PG 5 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100146 ER PT J AU Romano, P Ozyuzer, L Yusof, Z Kurter, C Zasadzinski, JF AF Romano, P Ozyuzer, L Yusof, Z Kurter, C Zasadzinski, JF TI Modeling study of the dip-hump feature in Bi2Sr2CaCu2O8+delta tunneling spectroscopy SO PHYSICAL REVIEW B LA English DT Article ID T-C SUPERCONDUCTORS; OVERDOPED BI2SR2CACU2O8+DELTA; SINGLE-CRYSTALS; GAP; PHOTOEMISSION; PSEUDOGAP; JOSEPHSON AB The tunneling spectra of high-temperature superconductors on Bi2Sr2CaCu2O8+delta (Bi-2212) reproducibly show a high-bias structure in the form of a dip-hump at voltages higher than the gap voltage. Of central concern is whether this feature originates from the normal state background or is intrinsic to the superconducting mechanism. We address this issue by generating a set of model conductance curves-a "normal state" conductance that takes into account effects such as the band structure and a possible pseudogap, and a pure superconducting state conductance. When combined, the result shows that the dip-hump feature present in the experimental conductance curves cannot be naively attributed to a normal state effect. In particular, strong dip features found in superconductor-insulator-superconductor data on optimally doped Bi-2212, including negative dI/dV, cannot be a consequence of an extrinsic pseudogap. However, such features can easily arise from state-conserving deviations in the superconducting density of states, e.g., from strong-coupling effects. C1 Univ Sannio, CNR, INFM, SUPERMAT Salerno, I-82100 Benevento, Italy. Univ Sannio, DSBA, I-82100 Benevento, Italy. Izmir Inst Technol, Dept Phys, TR-35430 Izmir, Turkey. Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA. IIT, Div Phys, Chicago, IL 60616 USA. RP Univ Sannio, CNR, INFM, SUPERMAT Salerno, Via Port Arsa 11, I-82100 Benevento, Italy. EM ozyuzer@iyte.edu.tr RI Ozyuzer, Lutfi/H-3142-2011 NR 23 TC 11 Z9 11 U1 0 U2 2 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 MAR PY 2006 VL 73 IS 9 AR 092514 DI 10.1103/PhysRevB.73.092514 PG 4 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100042 ER PT J AU Rose, V Buchanan, K Chung, SH Grimsditch, M Metlushko, V Hoffmann, A Novosad, V Bader, SD Ibach, H AF Rose, V Buchanan, K Chung, SH Grimsditch, M Metlushko, V Hoffmann, A Novosad, V Bader, SD Ibach, H TI Frustrated magnetic vortices in a triad of permalloy rings: Magneto-optical Kerr effect, magnetic force microscopy, and micromagnetic simulations SO PHYSICAL REVIEW B LA English DT Article ID ELEMENTS; ARRAYS; NANOMAGNETS; REVERSAL; FIELD AB The field dependent magnetization of three mutually touching permalloy rings were investigated by means of the magneto-optical Kerr effect, magnetic force microscopy, and micromagnetic simulations. Each ring has a width of 0.2-1.8 mu m, an outer diameter of 4 mu m, and a thickness of 17 nm. Decreasing an applied magnetic field from saturation leads to the nucleation and annihilation of magnetic vortices, leaving at least one ring in a magnetically frustrated state. The properties of the magnetization reversal strongly depend on the ring width and on the direction of the applied field. Multiple complex reversal paths with vortexlike magnetization configurations are found. C1 Res Ctr Julich, Inst Surfaces & Interfaces, D-52425 Julich, Germany. Res Ctr Julich, Ctr Nanoelect Syst Informat Technol, D-52425 Julich, Germany. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. Univ Illinois, Chicago, IL 60612 USA. RP Rose, V (reprint author), Res Ctr Julich, Inst Surfaces & Interfaces, D-52425 Julich, Germany. EM v.rose@fz-juelich.de RI Bader, Samuel/A-2995-2013; Hoffmann, Axel/A-8152-2009; Novosad, Valentyn/C-2018-2014; Rose, Volker/B-1103-2008; Novosad, V /J-4843-2015; OI Hoffmann, Axel/0000-0002-1808-2767; Rose, Volker/0000-0002-9027-1052; Buchanan, Kristen/0000-0003-0879-0038 NR 28 TC 7 Z9 7 U1 0 U2 6 PU AMERICAN 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 MAR PY 2006 VL 73 IS 9 AR 094442 DI 10.1103/PhysRevB.73.094442 PG 7 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100130 ER PT J AU Samulon, EC Islam, Z Sebastian, SE Brooks, PB McCourt, MK Ilavsky, J Fisher, IR AF Samulon, EC Islam, Z Sebastian, SE Brooks, PB McCourt, MK Ilavsky, J Fisher, IR TI Low-temperature structural phase transition and incommensurate lattice modulation in the spin-gap compound BaCuSi2O6 SO PHYSICAL REVIEW B LA English DT Article ID MODES AB Results of high-resolution x-ray diffraction experiments are presented for single crystals of the spin-gap compound BaCuSi2O6 in the temperature range from 16 to 300 K. The data show clear evidence of a transition from the room-temperature tetragonal phase into an incommensurately modulated orthorhombic structure below similar to 100 K. This lattice modulation is characterized by a resolution-limited reduced wavevector q(IC)=(0,0.129 +/- 0.001,0) (reciprocal lattice units) referred to the orthorhombic lattice, and its second and third harmonics. The phase transition is first order and exhibits considerable hysteresis. This observation implies that the spin Hamiltonian representing the system is more complex than originally thought. C1 Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA. Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Stanford Univ, Dept Phys, Stanford, CA 94305 USA. RP Samulon, EC (reprint author), Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA. RI Ilavsky, Jan/D-4521-2013; OI Ilavsky, Jan/0000-0003-1982-8900; McCourt, Michael/0000-0003-4531-7733 NR 15 TC 19 Z9 19 U1 1 U2 10 PU AMERICAN 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 MAR PY 2006 VL 73 IS 10 AR 100407 DI 10.1103/PhysRevB.73.100407 PG 4 WC Physics, Condensed Matter SC Physics GA 028DN UT WOS:000236467200008 ER PT J AU Schnack, J Bruger, M Luban, M Kogerler, P Morosan, E Fuchs, R Modler, R Nojiri, H Rai, RC Cao, J Musfeldt, JL Wei, X AF Schnack, J Bruger, M Luban, M Kogerler, P Morosan, E Fuchs, R Modler, R Nojiri, H Rai, RC Cao, J Musfeldt, JL Wei, X TI Observation of field-dependent magnetic parameters in the magnetic molecule {Ni4Mo12} SO PHYSICAL REVIEW B LA English DT Article ID CLUSTERS; COMPLEXES; ANISOTROPY; CRYSTAL; IONS AB We investigate the bulk magnetic, electron paramagnetic resonance, and magneto-optical properties of {Ni4Mo12}, a magnetic molecule with antiferromagnetically coupled tetrahedral Ni-II in a diamagnetic molybdenum matrix. The low-temperature magnetization exhibits steps at irregular field intervals, a result that cannot be explained using a Heisenberg model even if it is augmented by magnetic anisotropy and biquadratic terms. Allowing the exchange and anisotropy parameters to depend on the magnetic field provides the best fit to our data, suggesting that the molecular structure (and thus the interactions between spins) may be changing with applied magnetic field. C1 Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Johann Modler GmbH, D-63741 Aschaffenburg, Germany. Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan. Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. RP Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany. EM jschnack@uos.de RI Schnack, Jurgen/A-4079-2008; Cao, Jinbo/C-7537-2009; Nojiri, Hiroyuki/B-3688-2011; Kogerler, Paul/H-5866-2013; OI Schnack, Jurgen/0000-0003-0702-2723; Kogerler, Paul/0000-0001-7831-3953; Rai, Ram/0000-0003-2475-2488 NR 45 TC 31 Z9 31 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 9 AR 094401 DI 10.1103/PhysRevB.73.094401 PG 9 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100089 ER PT J AU Sergienko, IA Dagotto, E AF Sergienko, IA Dagotto, E TI Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites SO PHYSICAL REVIEW B LA English DT Article ID WEAK FERROMAGNETISM; DOUBLE-EXCHANGE; POLARIZATION; MODEL AB With the perovskite multiferroic RMnO3 (R=Gd,Tb,Dy) as guidance, we argue that the Dzyaloshinskii-Moriya interaction (DMI) provides the microscopic mechanism for the coexistence and strong coupling between ferroelectricity and incommensurate magnetism. We use Monte Carlo simulations and zero-temperature exact calculations to study a model incorporating the double-exchange, superexchange, Jahn-Teller, and DMI terms. The phase diagram contains a multiferroic phase between A and E antiferromagnetic phases, in excellent agreement with experiments. C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. RP Oak Ridge Natl Lab, Condensed Matter Sci Div, POB 2008, Oak Ridge, TN 37831 USA. NR 32 TC 744 Z9 749 U1 30 U2 205 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 MAR PY 2006 VL 73 IS 9 AR 094434 DI 10.1103/PhysRevB.73.094434 PG 5 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100122 ER PT J AU Singh, DJ AF Singh, DJ TI Electronic structure and bond competition in the polar magnet PbVO3 SO PHYSICAL REVIEW B LA English DT Article ID FERROELECTRICS; STABILITY AB Density functional electronic structure studies of tetragonal PbVO3 are reported. The results show an important role for both Pb 6p-O 2p and V d-O p bonding, with an interplay between these. This is discussed in relation to the possibility of obtaining magnetoelectric behavior. C1 Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA. RP Singh, DJ (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA. RI Singh, David/I-2416-2012 NR 25 TC 34 Z9 34 U1 4 U2 11 PU AMERICAN 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 MAR PY 2006 VL 73 IS 9 AR 094102 DI 10.1103/PhysRevB.73.094102 PG 5 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100048 ER PT J AU Tokiwa, Y Pikul, A Gegenwart, P Steglich, F Bud'ko, SL Canfield, PC AF Tokiwa, Y Pikul, A Gegenwart, P Steglich, F Bud'ko, SL Canfield, PC TI Low-temperature thermodynamic properties of the heavy-fermion compound YbAgGe close to the field-induced quantum critical point SO PHYSICAL REVIEW B LA English DT Article ID INELASTIC NEUTRON-SCATTERING AB We present temperature and field dependent heat capacity and magnetization data taken at temperatures down to 50 mK and in an applied magnetic field up to 11.5 T for YbAgGe, a heavy-fermion compound with a field induced quantum critical point. These data clearly indicate that the same electronic degrees of freedom are responsible for the features seen in both specific heat and magnetization data. In addition, they further refine the different boundaries suggested for the H-T phase diagram of YbAgGe through previous, magneto-transport measurements, and allow for further understanding of different phases on the H-T phase diagram, in particular, clearly disconnecting the field-induced quantum critical point in YbAgGe from any sort of saturation of the Yb moment in higher applied magnetic field. C1 Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany. US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Tokiwa, Y (reprint author), Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany. RI Canfield, Paul/H-2698-2014; Pikul, Adam/G-5650-2015; Tokiwa, Yoshifumi/P-6593-2015; Gegenwart, Philipp/A-7291-2017 OI Tokiwa, Yoshifumi/0000-0002-6294-7879; NR 16 TC 14 Z9 14 U1 2 U2 7 PU AMERICAN 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 MAR PY 2006 VL 73 IS 9 AR 094435 DI 10.1103/PhysRevB.73.094435 PG 6 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100123 ER PT J AU Tretiakov, OA Matveev, KA AF Tretiakov, OA Matveev, KA TI Decay of metastable current states in one-dimensional resonant tunneling devices SO PHYSICAL REVIEW B LA English DT Article ID GAAS-ALAS SUPERLATTICES; INTRINSIC BISTABILITY; FALSE VACUUM; FLUCTUATIONS; TIME; SUPERSYMMETRY; TRANSITION; BREAKING; FIELD; FATE AB Current switching in a double-barrier resonant tunneling structure is studied in the regime where the current-voltage characteristic exhibits intrinsic bistability, so that in a certain range of bias two different steady states of current are possible. Near the upper boundary V-th of the bistable region the upper current state is metastable, and because of the shot noise it eventually decays to the stable lower current state. We find the time of this switching process in strip-shaped devices, with the width small compared to the length. As the bias V is tuned away from the boundary value V-th of the bistable region, the mean switching time tau increases exponentially. We show that in long strips ln tau proportional to(V-th-V)(5/4), whereas in short strips ln tau proportional to(V-th-V)(3/2). The one-dimensional geometry of the problem enables us to obtain analytically exact expressions for both the exponential and the prefactor of tau. Furthermore, we show that, depending on the parameters of the system, the switching can be initiated either inside the strip, or at its ends. C1 Duke Univ, Dept Phys, Durham, NC 27708 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Tretiakov, OA (reprint author), Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. RI Tretiakov, Oleg/A-2795-2009 OI Tretiakov, Oleg/0000-0001-7283-6884 NR 41 TC 2 Z9 2 U1 0 U2 1 PU AMERICAN 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 MAR PY 2006 VL 73 IS 11 AR 115302 DI 10.1103/PhysRevB.73.115302 PG 11 WC Physics, Condensed Matter SC Physics GA 028DO UT WOS:000236467300079 ER PT J AU Trinkle, DR Jones, MD Hennig, RG Rudin, SP Albers, RC Wilkins, JW AF Trinkle, DR Jones, MD Hennig, RG Rudin, SP Albers, RC Wilkins, JW TI Empirical tight-binding model for titanium phase transformations SO PHYSICAL REVIEW B LA English DT Article ID TOTAL-ENERGY CALCULATIONS; PHONON DISPERSIONS; FORCE-CONSTANTS; BRILLOUIN-ZONE; SPECIAL POINTS; NOBLE-METALS; TRANSITION; OMEGA; DYNAMICS; ALPHA AB For a previously published study of the titanium hexagonal close packed (alpha) to omega (omega) transformation, a tight-binding model was developed for titanium that accurately reproduces the structural energies and electron eigenvalues from all-electron density-functional calculations. We use a fitting method that matches the correctly symmetrized wave functions of the tight-binding model to those of the density-functional calculations at high symmetry points. The structural energies, elastic constants, phonon spectra, and point-defect energies predicted by our tight-binding model agree with density-functional calculations and experiment. In addition, a modification to the functional form is implemented to overcome the "collapse problem" of tight binding, necessary for phase transformation studies and molecular dynamics simulations. The accuracy, transferability, and efficiency of the model makes it particularly well suited to understanding structural transformations in titanium. C1 USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. SUNY Buffalo, Buffalo, NY 14260 USA. Ohio State Univ, Columbus, OH 43210 USA. RP USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA. RI Trinkle, Dallas/E-6609-2010; Hennig, Richard/A-2978-2008 OI Hennig, Richard/0000-0003-4933-7686 NR 33 TC 16 Z9 16 U1 2 U2 20 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 MAR PY 2006 VL 73 IS 9 AR 094123 DI 10.1103/PhysRevB.73.094123 PG 9 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100069 ER PT J AU Valkunas, L Ma, YZ Fleming, GR AF Valkunas, L Ma, YZ Fleming, GR TI Exciton-exciton annihilation in single-walled carbon nanotubes SO PHYSICAL REVIEW B LA English DT Article ID LIGHT-HARVESTING ANTENNA; PHOTOSYNTHETIC SYSTEMS; EXCITATION ANNIHILATION; CHROMOPHORE COMPLEXES; TRANSIENT ABSORPTION; DYNAMICS; KINETICS; ENERGY; RECOMBINATION; FLUORESCENCE AB The femtosecond fluorescence and transient absorption kinetics recorded on selected semiconducting single-walled carbon nanotubes exhibit pronounced excitation-intensity-dependent decays as the result of exciton-exciton annihilation. A satisfactory description of the decays obtained at various excitation intensities, however, requires a time-independent annihilation rate that is valid only for extended systems with dimensionality greater than 2 in conjunction with diffusive migration of excitons. We resolved this apparent contradiction by developing a stochastic model, in which we assumed that the exciton states in semiconducting nanotubes are coherent, and the multiexciton manifolds are resonantly coupled with other excited states, which decay by subsequent linear relaxation due to electron-phonon coupling. The formalism derived from this model enables a qualitative description of the experimental results for the (9,5), (8,3), and (6,5) semiconducting single-walled carbon nanotubes. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. Inst Phys, LT-02300 Vilnius, Lithuania. Vilnius State Univ, Fac Phys, Dept Theoret Phys, LT-10222 Vilnius, Lithuania. RP Fleming, GR (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM grfleming@lbl.gov RI Ma, Yingzhong/L-6261-2016 OI Ma, Yingzhong/0000-0002-8154-1006 NR 55 TC 57 Z9 57 U1 1 U2 22 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 MAR PY 2006 VL 73 IS 11 AR 115432 DI 10.1103/PhysRevB.73.115432 PG 12 WC Physics, Condensed Matter SC Physics GA 028DO UT WOS:000236467300152 ER PT J AU Wu, KA Karma, A Hoyt, JJ Asta, M AF Wu, KA Karma, A Hoyt, JJ Asta, M TI Ginzburg-Landau theory of crystalline anisotropy for bcc-liquid interfaces SO PHYSICAL REVIEW B LA English DT Article ID DENDRITIC GROWTH; MELT INTERFACE; FREE-ENERGIES; PATTERN SELECTION; MOLECULAR THEORY; SOLIDIFICATION; POTENTIALS; SIMULATION AB The weak anisotropy of the interfacial free energy gamma is a crucial parameter influencing dendritic crystal growth morphologies in systems with atomically rough solid-liquid interfaces. The physical origin and quantitative prediction of this anisotropy are investigated for body-centered-cubic (bcc) forming systems using a Ginzburg-Landau theory where the order parameters are the amplitudes of density waves corresponding to principal reciprocal lattice vectors. We find that this theory predicts the correct sign gamma(100 >)gamma(110) and magnitude (gamma(100)-gamma(110))/(gamma(100)+gamma(110))approximate to 1% of this anisotropy in good agreement with the results of molecular dynamics (MD) simulations for Fe. The results show that the directional dependence of the rate of spatial decay of solid density waves into the liquid, imposed by the crystal structure, is a main determinant of anisotropy. This directional dependence is validated by MD computations of density wave profiles for different reciprocal lattice vectors for {110} crystal faces. Our results are contrasted with the prediction of the reverse ordering gamma(100)= 8) clusters with closed-shell electronic configurations are higher than that of As-4, indicating their relative stability upon dissociation into As-4 fragments. Similar to P-n clusters, supercluster structures based on As-4, As-6, As-8 units and As-2 bridge were found to be dominant for the larger As-n with n >= 14. The size-dependent physical properties of clusters such as atomization energies, ionization potentials, and molecular orbital gaps have been discussed. C1 Dalian Univ Technol, State Key Lab Mat Modificat Laser Electron & Ion, Dalian 116024, Peoples R China. Dalian Univ Technol, Coll Adv Sci & Technol, Dalian 116024, Peoples R China. Washington State Univ, Inst Shock Phys, Pullman, WA 99164 USA. Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 224502, Peoples R China. SE Univ, Dept Phys, Nanjing 210096, Peoples R China. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Zhao, JJ (reprint author), Dalian Univ Technol, State Key Lab Mat Modificat Laser Electron & Ion, Dalian 116024, Peoples R China. EM zhaojj@dlut.edu.cn RI Wang, Jinlan/B-3507-2012; Wang, Jinlan/B-3503-2012; Zhao, Jijun/I-6030-2015 OI Wang, Jinlan/0000-0002-4529-874X; NR 60 TC 21 Z9 21 U1 1 U2 4 PU AMERICAN 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 MAR PY 2006 VL 73 IS 11 AR 115418 DI 10.1103/PhysRevB.73.115418 PG 10 WC Physics, Condensed Matter SC Physics GA 028DO UT WOS:000236467300138 ER PT J AU Zvyagin, SA Wosnitza, J Krzystek, J Stern, R Jaime, M Sasago, Y Uchinokura, K AF Zvyagin, SA Wosnitza, J Krzystek, J Stern, R Jaime, M Sasago, Y Uchinokura, K TI Spin-triplet excitons in the S=1/2 gapped antiferromagnet BaCuSi2O6: Electron paramagnetic resonance studies SO PHYSICAL REVIEW B LA English DT Article ID TEMPERATURE; EPR; CHAINS AB BaCuSi2O6, a S=1/2 quantum antiferromagnet with a double-layer structure of Cu2+ ions in a distorted planar-rectangular coordination and with a dimerized spin singlet ground state, has been studied by means of the electron paramagnetic resonance technique. It is argued that multiple absorptions observed at low temperatures are intimately related to a thermally activated spin-triplet exciton superstructure, which appears to be a characteristic feature of low-dimensional anisotropic spin-1/2 systems with the dimerized spin-singlet ground state. We showed that analysis of the angular dependence of exciton modes could be used for accurate estimation of anisotropy parameters in BaCuSi2O6; the procedure can be applied for a large number of S=1/2 quantum antiferromagnets. In addition, the temperature dependence of EPR intensity and linewidth in BaCuSi2O6 has been studied and discussed. C1 Forschungszentrum Rossendorf, Dresden High Magnet Field Lab, HLD, D-01314 Dresden, Germany. Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. NICPB, EE-12618 Tallinn, Estonia. Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA. Hitachi Ltd, Cent Res Lab, Kokubunji, Tokyo 1858601, Japan. RIKEN, Wako, Saitama 3510198, Japan. RP Forschungszentrum Rossendorf, Dresden High Magnet Field Lab, HLD, Postfach 510119, D-01314 Dresden, Germany. RI Zvyagin, Sergei/H-8389-2014; Jaime, Marcelo/F-3791-2015; Stern, Raivo/A-5387-2008 OI Jaime, Marcelo/0000-0001-5360-5220; Stern, Raivo/0000-0002-6724-9834 NR 26 TC 15 Z9 15 U1 1 U2 23 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 MAR PY 2006 VL 73 IS 9 AR 094446 DI 10.1103/PhysRevB.73.094446 PG 5 WC Physics, Condensed Matter SC Physics GA 028DM UT WOS:000236467100134 ER PT J AU Adams, J Aggarwal, MM Ahammed, Z Amonett, J Anderson, BD Arkhipkin, D Averichev, GS Badyal, SK Bai, Y Balewski, J Barannikova, O Barnby, LS Baudot, J Bekele, S Belaga, VV Bellingeri-Laurikainen, A Bellwied, R Berger, J Bezverkhny, BI Bharadwaj, S Bhasin, A Bhati, AK Bichsel, H Bielcik, J Bielcikova, J Billmeier, A Bland, LC Blyth, CO Blyth, SL Bonner, BE Botje, M Boucham, A Bouchet, J Brandin, AV Bravar, A Bystersky, M Cadman, RV Cai, XZ Caines, H Sanchez, MCD Castillo, J Catu, O Cebra, D Chajecki, Z Chaloupka, P Chattopadhyay, S Chen, HF Chen, JH Chen, Y Cheng, J Cherney, M Chikanian, A Choi, HA Christie, W Coffin, JP Cormier, TM Cosentino, MR Cramer, JG Crawford, HJ Das, D Das, S Daugherity, M de Moura, MM Dedovich, TG DePhillips, M Derevschikov, AA Didenko, L Dietel, T Dogra, SM Dong, WJ Dong, X Draper, JE Du, F Dunin, VB Dunlop, JC Majumdar, MRD Eckardt, V Edwards, WR Efimov, LG Emelianov, V Engelage, J Eppley, G Erazmus, B Estienne, M Fachini, P Faivre, J Fatemi, R Fedorisin, J Filimonov, K Filip, P Finch, E Fine, V Fisyak, Y Fornazier, KSF Fu, J Gagliardi, CA Gaillard, L Gans, J Ganti, MS Geurts, F Ghazikhanian, V Ghosh, P Gonzalez, JE Gorbunov, YG Gos, H Grachov, O Grebenyuk, O Grosnick, D Guertin, SM Guo, Y Gupta, A Gupta, N Gutierrez, TD Hallman, TJ Hamed, A Hardtke, D Harris, JW Heinz, M Henry, TW Hepplemann, S Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Horner, MJ Huang, HZ Huang, SL Hughes, EW Humanic, TJ Igo, G Ishihara, A Jacobs, P Jacobs, WW Jiang, H Jones, PG Judd, EG Kabana, S Kang, K Kaplan, M Keane, D Kechechyan, A Khodyrev, VY Kim, BC Kiryluk, J Kisiel, A Kislov, EM Klay, J Klein, SR Koetke, DD Kollegger, T Kopytine, M Kotchenda, L Kowalik, KL Kramer, M Kravtsov, P Kravtsov, VI Krueger, K Kuhn, C Kulikov, AI Kumar, A Kutuev, RK Kuznetsov, AA Lamont, MAC Landgraf, JM Lange, S Laue, F Lauret, J Lebedev, A Lednicky, R Lee, CH Lehocka, S LeVine, MJ Li, C Li, Q Li, Y Lin, G Lindenbaum, SJ Lisa, MA Liu, F Liu, H Liu, J Liu, L Liu, QJ Liu, Z Ljubicic, T Llope, WJ Long, H Longacre, RS Lopez-Noriega, M Love, WA Lu, Y Ludlam, T Lynn, D Ma, GL Ma, JG Ma, YG Magestro, D Mahajan, S Mahapatra, DP Majka, R Mangotra, LK Manweiler, R Margetis, S Markert, C Martin, L Marx, JN Matis, HS Matulenko, YA McClain, CJ McShane, TS Meissner, F Melnick, Y Meschanin, A Miller, ML Minaev, NG Mironov, C Mischke, A Mishra, DK Mitchell, J Mohanty, B Molnar, L Moore, CF Morozov, DA Munhoz, MG Nandi, BK Nayak, SK Nayak, TK Nelson, JM Netrakanti, PK Nikitin, VA Nogach, LV Nurushev, SB Odyniec, G Ogawa, A Okorokov, V Oldenburg, M Olson, D Pal, SK Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Peitzmann, T Perevoztchikov, V Perkins, C Peryt, W Petrov, VA Phatak, SC Picha, R Planinic, M Pluta, J Porile, N Porter, J Poskanzer, AM Potekhin, M Potrebenikova, E Potukuchi, BVKS Prindle, D Pruneau, C Putschke, J Rakness, G Raniwala, R Raniwala, S Ravel, O Ray, RL Razin, SV Reichhold, D Reid, JG Reinnarth, J Renault, G Retiere, F Ridiger, A Ritter, HG Roberts, JB Rogachevskiy, OV Romero, JL Rose, A Roy, C Ruan, L Russcher, MJ Sahoo, R Sakrejda, I Salur, S Sandweiss, J Sarsour, M Savin, I Sazhin, PS Schambach, J Scharenberg, RP Schmitz, N Schweda, K Seger, J Selyuzhenkov, I Seyboth, P Shahaliev, E Shao, M Shao, W Sharma, M Shen, WQ Shestermanov, KE Shimanskiy, SS Sichtermann, E Simon, F Singaraju, RN Smirnov, N Snellings, R Sood, G Sorensen, P Sowinski, J Speltz, J Spinka, HM Srivastava, B Stadnik, A Stanislaus, TDS Stock, R Stolpovsky, A Strikhanov, M Stringfellow, B Suaide, AAP Sugarbaker, E Sumbera, M Surrow, B Swanger, M Symons, TJM de Toledo, AS Tai, A Takahashi, J Tang, AH Tarnowsky, T Thein, D Thomas, JH Timmins, AR Timoshenko, S Tokarev, M Trainor, TA Trentalange, S Tribble, RE Tsai, OD Ulery, J Ullrich, T Underwood, DG van Buren, G van der Kolk, N van Leeuwen, M Vander Molen, AM Varma, R Vasilevski, IM Vasiliev, AN Vernet, R Vigdor, SE Viyogi, YP Vokal, S Voloshin, SA Waggoner, WT Wang, F Wang, G Wang, G Wang, XL Wang, Y Wang, Y Wang, ZM Ward, H Watson, JW Webb, JC Westfall, GD Wetzler, A Whitten, C Wieman, H Wissink, SW Witt, R Wood, J Wu, J Xu, N Xu, Z Xu, ZZ Yamamoto, E Yepes, P Yoo, IK Yurevich, VI Zborovsky, I Zhang, H Zhang, WM Zhang, Y Zhang, ZP Zhong, C Zoulkarneev, R Zoulkarneeva, Y Zubarev, AN Zuo, JX AF Adams, J Aggarwal, MM Ahammed, Z Amonett, J Anderson, BD Arkhipkin, D Averichev, GS Badyal, SK Bai, Y Balewski, J Barannikova, O Barnby, LS Baudot, J Bekele, S Belaga, VV Bellingeri-Laurikainen, A Bellwied, R Berger, J Bezverkhny, BI Bharadwaj, S Bhasin, A Bhati, AK Bichsel, H Bielcik, J Bielcikova, J Billmeier, A Bland, LC Blyth, CO Blyth, SL Bonner, BE Botje, M Boucham, A Bouchet, J Brandin, AV Bravar, A Bystersky, M Cadman, RV Cai, XZ Caines, H Sanchez, MCD Castillo, J Catu, O Cebra, D Chajecki, Z Chaloupka, P Chattopadhyay, S Chen, HF Chen, JH Chen, Y Cheng, J Cherney, M Chikanian, A Choi, HA Christie, W Coffin, JP Cormier, TM Cosentino, MR Cramer, JG Crawford, HJ Das, D Das, S Daugherity, M de Moura, MM Dedovich, TG DePhillips, M Derevschikov, AA Didenko, L Dietel, T Dogra, SM Dong, WJ Dong, X Draper, JE Du, F Dunin, VB Dunlop, JC Majumdar, MRD Eckardt, V Edwards, WR Efimov, LG Emelianov, V Engelage, J Eppley, G Erazmus, B Estienne, M Fachini, P Faivre, J Fatemi, R Fedorisin, J Filimonov, K Filip, P Finch, E Fine, V Fisyak, Y Fornazier, KSF Fu, J Gagliardi, CA Gaillard, L Gans, J Ganti, MS Geurts, F Ghazikhanian, V Ghosh, P Gonzalez, JE Gorbunov, YG Gos, H Grachov, O Grebenyuk, O Grosnick, D Guertin, SM Guo, Y Gupta, A Gupta, N Gutierrez, TD Hallman, TJ Hamed, A Hardtke, D Harris, JW Heinz, M Henry, TW Hepplemann, S Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Horner, MJ Huang, HZ Huang, SL Hughes, EW Humanic, TJ Igo, G Ishihara, A Jacobs, P Jacobs, WW Jiang, H Jones, PG Judd, EG Kabana, S Kang, K Kaplan, M Keane, D Kechechyan, A Khodyrev, VY Kim, BC Kiryluk, J Kisiel, A Kislov, EM Klay, J Klein, SR Koetke, DD Kollegger, T Kopytine, M Kotchenda, L Kowalik, KL Kramer, M Kravtsov, P Kravtsov, VI Krueger, K Kuhn, C Kulikov, AI Kumar, A Kutuev, RK Kuznetsov, AA Lamont, MAC Landgraf, JM Lange, S Laue, F Lauret, J Lebedev, A Lednicky, R Lee, CH Lehocka, S LeVine, MJ Li, C Li, Q Li, Y Lin, G Lindenbaum, SJ Lisa, MA Liu, F Liu, H Liu, J Liu, L Liu, QJ Liu, Z Ljubicic, T Llope, WJ Long, H Longacre, RS Lopez-Noriega, M Love, WA Lu, Y Ludlam, T Lynn, D Ma, GL Ma, JG Ma, YG Magestro, D Mahajan, S Mahapatra, DP Majka, R Mangotra, LK Manweiler, R Margetis, S Markert, C Martin, L Marx, JN Matis, HS Matulenko, YA McClain, CJ McShane, TS Meissner, F Melnick, Y Meschanin, A Miller, ML Minaev, NG Mironov, C Mischke, A Mishra, DK Mitchell, J Mohanty, B Molnar, L Moore, CF Morozov, DA Munhoz, MG Nandi, BK Nayak, SK Nayak, TK Nelson, JM Netrakanti, PK Nikitin, VA Nogach, LV Nurushev, SB Odyniec, G Ogawa, A Okorokov, V Oldenburg, M Olson, D Pal, SK Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Peitzmann, T Perevoztchikov, V Perkins, C Peryt, W Petrov, VA Phatak, SC Picha, R Planinic, M Pluta, J Porile, N Porter, J Poskanzer, AM Potekhin, M Potrebenikova, E Potukuchi, BVKS Prindle, D Pruneau, C Putschke, J Rakness, G Raniwala, R Raniwala, S Ravel, O Ray, RL Razin, SV Reichhold, D Reid, JG Reinnarth, J Renault, G Retiere, F Ridiger, A Ritter, HG Roberts, JB Rogachevskiy, OV Romero, JL Rose, A Roy, C Ruan, L Russcher, MJ Sahoo, R Sakrejda, I Salur, S Sandweiss, J Sarsour, M Savin, I Sazhin, PS Schambach, J Scharenberg, RP Schmitz, N Schweda, K Seger, J Selyuzhenkov, I Seyboth, P Shahaliev, E Shao, M Shao, W Sharma, M Shen, WQ Shestermanov, KE Shimanskiy, SS Sichtermann, E Simon, F Singaraju, RN Smirnov, N Snellings, R Sood, G Sorensen, P Sowinski, J Speltz, J Spinka, HM Srivastava, B Stadnik, A Stanislaus, TDS Stock, R Stolpovsky, A Strikhanov, M Stringfellow, B Suaide, AAP Sugarbaker, E Sumbera, M Surrow, B Swanger, M Symons, TJM de Toledo, AS Tai, A Takahashi, J Tang, AH Tarnowsky, T Thein, D Thomas, JH Timmins, AR Timoshenko, S Tokarev, M Trainor, TA Trentalange, S Tribble, RE Tsai, OD Ulery, J Ullrich, T Underwood, DG van Buren, G van der Kolk, N van Leeuwen, M Vander Molen, AM Varma, R Vasilevski, IM Vasiliev, AN Vernet, R Vigdor, SE Viyogi, YP Vokal, S Voloshin, SA Waggoner, WT Wang, F Wang, G Wang, G Wang, XL Wang, Y Wang, Y Wang, ZM Ward, H Watson, JW Webb, JC Westfall, GD Wetzler, A Whitten, C Wieman, H Wissink, SW Witt, R Wood, J Wu, J Xu, N Xu, Z Xu, ZZ Yamamoto, E Yepes, P Yoo, IK Yurevich, VI Zborovsky, I Zhang, H Zhang, WM Zhang, Y Zhang, ZP Zhong, C Zoulkarneev, R Zoulkarneeva, Y Zubarev, AN Zuo, JX CA STAR Collaboration TI Multiplicity and pseudorapidity distributions of charged particles and photons at forward pseudorapidity in Au plus Au collisons at root s(NN)=62.4 GeV SO PHYSICAL REVIEW C LA English DT Article ID NUCLEUS-NUCLEUS COLLISIONS; HEAVY-ION COLLISIONS; HIGH-DENSITY QCD; SMALL-X; QUARK; STAR; ENERGIES; DETECTOR; MATTER; MODEL AB We present the centrality-dependent measurement of multiplicity and pseudorapidity distributions of charged particles and photons in Au+Au collisions at root s(NN)=62.4 GeV. The charged particles and photons are measured in the pseudorapidity region 2.9 <=eta <= 3.9 and 2.3 <=eta <= 3.7, respectively. We have studied the scaling of particle production with the number of participating nucleons and the number of binary collisions. The photon and charged particle production in the measured pseudorapidity range has been shown to be consistent with energy-independent limiting fragmentation behavior. Photons are observed to follow a centrality-independent limiting fragmentation behavior, while for charged particles it is centrality dependent. We have carried out a comparative study of the pseudorapidity distributions of positively charged hadrons, negatively charged hadrons, photons, pions, and net protons in nucleus-nucleus collisions and pseudorapidity distributions from p+p collisions. From these comparisons, we conclude that baryons in the inclusive charged particle distribution are responsible for the observed centrality dependence of limiting fragmentation. The mesons are found to follow an energy-independent behavior of limiting fragmentation, whereas the behavior of baryons is energy dependent. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Univ Bern, CH-3012 Bern, Switzerland. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Brookhaven Natl Lab, Upton, NY 11973 USA. CALTECH, Pasadena, CA 91121 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Creighton Univ, Omaha, NE 68178 USA. Acad Sci Czech Republic, Inst Phys Nucl, CZ-25068 Rez, Czech Republic. JINR, Lab High Energy, Dubna, Russia. JINR, Particle Phys Lab, Dubna, Russia. Goethe Univ Frankfurt, D-6000 Frankfurt, Germany. Inst Phys, Bhubaneswar 751005, Orissa, India. Indian Inst Technol, Bombay 400076, Maharashtra, India. Indiana Univ, Bloomington, IN 47408 USA. Inst Rech Subatom, Strasbourg, France. Univ Jammu, Jammu 180001, India. Kent State Univ, Kent, OH 44242 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. MIT, Cambridge, MA 02139 USA. Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany. Michigan State Univ, E Lansing, MI 48824 USA. Moscow Phys Engn Inst, Moscow, Russia. CUNY City Coll, New York, NY 10031 USA. NIKHEF, Amsterdam, Netherlands. Univ Utrecht, Amsterdam, Netherlands. Ohio State Univ, Columbus, OH 43210 USA. Panjab Univ, Chandigarh 160014, India. Penn State Univ, University Pk, PA 16802 USA. Inst High Energy Phys, Protvino, Russia. Purdue Univ, W Lafayette, IN 47907 USA. Pusan Natl Univ, Pusan 609735, South Korea. Univ Rajasthan, Jaipur 302004, Rajasthan, India. Rice Univ, Houston, TX 77251 USA. Univ Sao Paulo, Sao Paulo, Brazil. Univ Sci & Technol China, Hefei 230026, Peoples R China. Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China. SUBATECH, Nantes, France. Texas A&M Univ, College Stn, TX 77843 USA. Univ Texas, Austin, TX 78712 USA. Tsinghua Univ, Beijing 100084, Peoples R China. Valparaiso Univ, Valparaiso, IN 46383 USA. Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India. Warsaw Univ Technol, Warsaw, Poland. Univ Washington, Seattle, WA 98195 USA. Wayne State Univ, Detroit, MI 48201 USA. HZNU, CCNU, Inst Particle Phys, Wuhan 430079, Peoples R China. Yale Univ, New Haven, CT 06520 USA. Univ Zagreb, HR-10002 Zagreb, Croatia. RP Adams, J (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Strikhanov, Mikhail/P-7393-2014; Dogra, Sunil /B-5330-2013; Chaloupka, Petr/E-5965-2012; Suaide, Alexandre/L-6239-2016; van der Kolk, Naomi/M-9423-2016; Inst. of Physics, Gleb Wataghin/A-9780-2017; Okorokov, Vitaly/C-4800-2017; Ma, Yu-Gang/M-8122-2013; Barnby, Lee/G-2135-2010; Voloshin, Sergei/I-4122-2013; Lednicky, Richard/K-4164-2013; Zborovsky, Imrich/G-7964-2014; Cosentino, Mauro/L-2418-2014; Sumbera, Michal/O-7497-2014; Mischke, Andre/D-3614-2011; Takahashi, Jun/B-2946-2012; Chen, Yu/E-3788-2012; Planinic, Mirko/E-8085-2012; Peitzmann, Thomas/K-2206-2012; Witt, Richard/H-3560-2012; Castillo Castellanos, Javier/G-8915-2013 OI Strikhanov, Mikhail/0000-0003-2586-0405; Suaide, Alexandre/0000-0003-2847-6556; van der Kolk, Naomi/0000-0002-8670-0408; Okorokov, Vitaly/0000-0002-7162-5345; Ma, Yu-Gang/0000-0002-0233-9900; Barnby, Lee/0000-0001-7357-9904; Cosentino, Mauro/0000-0002-7880-8611; Sumbera, Michal/0000-0002-0639-7323; Takahashi, Jun/0000-0002-4091-1779; Peitzmann, Thomas/0000-0002-7116-899X; Castillo Castellanos, Javier/0000-0002-5187-2779 NR 63 TC 36 Z9 36 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 EI 1089-490X J9 PHYS REV C JI Phys. Rev. C PD MAR PY 2006 VL 73 IS 3 AR 034906 DI 10.1103/PhysRevC.73.034906 PG 14 WC Physics, Nuclear SC Physics GA 028DK UT WOS:000236466900056 ER PT J AU Adams, J Aggarwal, MM Ahammed, Z Amonett, J Anderson, BD Arkhipkin, D Averichev, GS Badyal, SK Bai, Y Balewski, J Barannikova, O Barnby, LS Baudot, J Bekele, S Belaga, VV Bellingeri-Laurikainen, A Bellwied, R Berger, J Bezverkhny, BI Bharadwaj, S Bhasin, A Bhati, AK Bhatia, VS Bichsel, H Bielcik, J Bielcikova, J Billmeier, A Bland, LC Blyth, CO Blyth, SL Bonner, BE Botje, M Boucham, A Bouchet, J Brandin, AV Bravar, A Bystersky, M Cadman, RV Cai, XZ Caines, H Sanchez, MCD Castillo, J Catu, O Cebra, D Chajecki, Z Chaloupka, P Chattopadhyay, S Chen, HF Chen, JH Chen, Y Cheng, J Cherney, M Chikanian, A Choi, HA Christie, W Coffin, JP Cormier, TM Cosentino, MR Cramer, JG Crawford, HJ Das, D Das, S Daugherity, M de Moura, MM Dedovich, TG DePhillips, M Derevschikov, AA Didenko, L Dietel, T Dogra, SM Dong, WJ Dong, X Draper, JE Du, F Dubey, AK Dunin, VB Dunlop, JC Mazumdar, MRD Eckardt, V Edwards, WR Efimov, LG Emelianov, V Engelage, J Eppley, G Erazmus, B Estienne, M Fachini, P Faivre, J Fatemi, R Fedorisin, J Filimonov, K Filip, P Finch, E Fine, V Fisyak, Y Fornazier, KSF Fu, J Gagliardi, CA Gaillard, L Gans, J Ganti, MS Geurts, F Ghazikhanian, V Ghosh, P Gonzalez, JE Gos, H Grachov, O Grebenyuk, O Grosnick, D Guertin, SM Guo, Y Gupta, A Gupta, N Gutierrez, TD Hallman, TJ Hamed, A Hardtke, D Harris, JW Heinz, M Henry, TW Hepplemann, S Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Horner, MJ Huang, HZ Huang, SL Hughes, EW Humanic, TJ Igo, G Ishihara, A Jacobs, P Jacobs, WW Jedynak, M Jiang, H Jones, PG Judd, EG Kabana, S Kang, K Kaplan, M Keane, D Kechechyan, A Khodyrev, VY Kim, BC Kiryluk, J Kisiel, A Kislov, EM Klay, J Klein, SR Koetke, DD Kollegger, T Kopytine, M Kotchenda, L Kowalik, KL Kramer, M Kravtsov, P Kravtsov, VI Krueger, K Kuhn, C Kulikov, AI Kumar, A Kutuev, RK Kuznetsov, AA Lamont, MAC Landgraf, JM Lange, S Laue, F Lauret, J Lebedev, A Lednicky, R Lee, CH Lehocka, S LeVine, MJ Li, C Li, Q Li, Y Lin, G Lindenbaum, SJ Lisa, MA Liu, F Liu, H Liu, J Liu, L Liu, QJ Liu, Z Ljubicic, T Llope, WJ Long, H Longacre, RS Lopez-Noriega, M Love, WA Lu, Y Ludlam, T Lynn, D Ma, GL Ma, JG Ma, YG Magestro, D Mahajan, S Mahapatra, DP Majka, R Mangotra, LK Manweiler, R Margetis, S Markert, C Martin, L Marx, JN Matis, HS Matulenko, YA McClain, CJ McShane, TS Meissner, F Melnick, Y Meschanin, A Miller, ML Minaev, NG Mironov, C Mischke, A Mishra, DK Mitchell, J Mohanty, B Molnar, L Moore, CF Morozov, DA Munhoz, MG Nandi, BK Nayak, SK Nayak, TK Nelson, JM Netrakanti, PK Nikitin, VA Nogach, LV Nurushev, SB Odyniec, G Ogawa, A Okorokov, V Oldenburg, M Olson, D Pal, SK Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Peitzmann, T Perevoztchikov, V Perkins, C Peryt, W Petrov, VA Phatak, SC Picha, R Planinic, M Pluta, J Porile, N Porter, J Poskanzer, AM Potekhin, M Potrebenikova, E Potukuchi, BVKS Prindle, D Pruneau, C Putschke, J Rakness, G Raniwala, R Raniwala, S Ravel, O Ray, RL Razin, SV Reichhold, D Reid, JG Reinnarth, J Renault, G Retiere, F Ridiger, A Ritter, HG Roberts, JB Rogachevskiy, OV Romero, JL Rose, A Roy, C Ruan, L Russcher, MJ Sahoo, R Sakrejda, I Salur, S Sandweiss, J Sarsour, M Savin, I Sazhin, PS Schambach, J Scharenberg, RP Schmitz, N Schweda, K Seger, J Selyuzhenkov, I Seyboth, P Shahaliev, E Shao, M Shao, W Sharma, M Shen, WQ Shestermanov, KE Shimanskiy, SS Sichtermann, E Simon, F Singaraju, RN Smirnov, N Snellings, R Sood, G Sorensen, P Sowinski, J Speltz, J Spinka, HM Srivastava, B Stadnik, A Stanislaus, TDS Stock, R Stolpovsky, A Strikhanov, M Stringfellow, B Suaide, AAP Sugarbaker, E Sumbera, M Surrow, B Swanger, M Symons, TJM de Toledo, AS Tai, A Takahashi, J Tang, AH Tarnowsky, T Thein, D Thomas, JH Timmins, AR Timoshenko, S Tokarev, M Trentalange, S Tribble, RE Tsai, OD Ulery, J Ullrich, T Underwood, DG van Buren, G van der Kolk, N van Leeuwen, M Vander Molen, AM Varma, R Vasilevski, IM Vasiliev, AN Vernet, R Vigdor, SE Viyogi, YP Vokal, S Voloshin, SA Waggoner, WT Wang, F Wang, G Wang, G Wang, XL Wang, Y Wang, Y Wang, ZM Ward, H Watson, JW Webb, JC Westfall, GD Wetzler, A Whitten, C Wieman, H Wissink, SW Witt, R Wood, J Wu, J Xu, N Xu, Z Xu, ZZ Yamamoto, E Yepes, P Yoo, IK Yurevich, VI Zborovsky, I Zhang, H Zhang, WM Zhang, Y Zhang, ZP Zhong, C Zoulkarneev, R Zoulkarneeva, Y Zubarev, AN Zuo, JX AF Adams, J Aggarwal, MM Ahammed, Z Amonett, J Anderson, BD Arkhipkin, D Averichev, GS Badyal, SK Bai, Y Balewski, J Barannikova, O Barnby, LS Baudot, J Bekele, S Belaga, VV Bellingeri-Laurikainen, A Bellwied, R Berger, J Bezverkhny, BI Bharadwaj, S Bhasin, A Bhati, AK Bhatia, VS Bichsel, H Bielcik, J Bielcikova, J Billmeier, A Bland, LC Blyth, CO Blyth, SL Bonner, BE Botje, M Boucham, A Bouchet, J Brandin, AV Bravar, A Bystersky, M Cadman, RV Cai, XZ Caines, H Sanchez, MCD Castillo, J Catu, O Cebra, D Chajecki, Z Chaloupka, P Chattopadhyay, S Chen, HF Chen, JH Chen, Y Cheng, J Cherney, M Chikanian, A Choi, HA Christie, W Coffin, JP Cormier, TM Cosentino, MR Cramer, JG Crawford, HJ Das, D Das, S Daugherity, M de Moura, MM Dedovich, TG DePhillips, M Derevschikov, AA Didenko, L Dietel, T Dogra, SM Dong, WJ Dong, X Draper, JE Du, F Dubey, AK Dunin, VB Dunlop, JC Mazumdar, MRD Eckardt, V Edwards, WR Efimov, LG Emelianov, V Engelage, J Eppley, G Erazmus, B Estienne, M Fachini, P Faivre, J Fatemi, R Fedorisin, J Filimonov, K Filip, P Finch, E Fine, V Fisyak, Y Fornazier, KSF Fu, J Gagliardi, CA Gaillard, L Gans, J Ganti, MS Geurts, F Ghazikhanian, V Ghosh, P Gonzalez, JE Gos, H Grachov, O Grebenyuk, O Grosnick, D Guertin, SM Guo, Y Gupta, A Gupta, N Gutierrez, TD Hallman, TJ Hamed, A Hardtke, D Harris, JW Heinz, M Henry, TW Hepplemann, S Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Horner, MJ Huang, HZ Huang, SL Hughes, EW Humanic, TJ Igo, G Ishihara, A Jacobs, P Jacobs, WW Jedynak, M Jiang, H Jones, PG Judd, EG Kabana, S Kang, K Kaplan, M Keane, D Kechechyan, A Khodyrev, VY Kim, BC Kiryluk, J Kisiel, A Kislov, EM Klay, J Klein, SR Koetke, DD Kollegger, T Kopytine, M Kotchenda, L Kowalik, KL Kramer, M Kravtsov, P Kravtsov, VI Krueger, K Kuhn, C Kulikov, AI Kumar, A Kutuev, RK Kuznetsov, AA Lamont, MAC Landgraf, JM Lange, S Laue, F Lauret, J Lebedev, A Lednicky, R Lee, CH Lehocka, S LeVine, MJ Li, C Li, Q Li, Y Lin, G Lindenbaum, SJ Lisa, MA Liu, F Liu, H Liu, J Liu, L Liu, QJ Liu, Z Ljubicic, T Llope, WJ Long, H Longacre, RS Lopez-Noriega, M Love, WA Lu, Y Ludlam, T Lynn, D Ma, GL Ma, JG Ma, YG Magestro, D Mahajan, S Mahapatra, DP Majka, R Mangotra, LK Manweiler, R Margetis, S Markert, C Martin, L Marx, JN Matis, HS Matulenko, YA McClain, CJ McShane, TS Meissner, F Melnick, Y Meschanin, A Miller, ML Minaev, NG Mironov, C Mischke, A Mishra, DK Mitchell, J Mohanty, B Molnar, L Moore, CF Morozov, DA Munhoz, MG Nandi, BK Nayak, SK Nayak, TK Nelson, JM Netrakanti, PK Nikitin, VA Nogach, LV Nurushev, SB Odyniec, G Ogawa, A Okorokov, V Oldenburg, M Olson, D Pal, SK Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Peitzmann, T Perevoztchikov, V Perkins, C Peryt, W Petrov, VA Phatak, SC Picha, R Planinic, M Pluta, J Porile, N Porter, J Poskanzer, AM Potekhin, M Potrebenikova, E Potukuchi, BVKS Prindle, D Pruneau, C Putschke, J Rakness, G Raniwala, R Raniwala, S Ravel, O Ray, RL Razin, SV Reichhold, D Reid, JG Reinnarth, J Renault, G Retiere, F Ridiger, A Ritter, HG Roberts, JB Rogachevskiy, OV Romero, JL Rose, A Roy, C Ruan, L Russcher, MJ Sahoo, R Sakrejda, I Salur, S Sandweiss, J Sarsour, M Savin, I Sazhin, PS Schambach, J Scharenberg, RP Schmitz, N Schweda, K Seger, J Selyuzhenkov, I Seyboth, P Shahaliev, E Shao, M Shao, W Sharma, M Shen, WQ Shestermanov, KE Shimanskiy, SS Sichtermann, E Simon, F Singaraju, RN Smirnov, N Snellings, R Sood, G Sorensen, P Sowinski, J Speltz, J Spinka, HM Srivastava, B Stadnik, A Stanislaus, TDS Stock, R Stolpovsky, A Strikhanov, M Stringfellow, B Suaide, AAP Sugarbaker, E Sumbera, M Surrow, B Swanger, M Symons, TJM de Toledo, AS Tai, A Takahashi, J Tang, AH Tarnowsky, T Thein, D Thomas, JH Timmins, AR Timoshenko, S Tokarev, M Trentalange, S Tribble, RE Tsai, OD Ulery, J Ullrich, T Underwood, DG van Buren, G van der Kolk, N van Leeuwen, M Vander Molen, AM Varma, R Vasilevski, IM Vasiliev, AN Vernet, R Vigdor, SE Viyogi, YP Vokal, S Voloshin, SA Waggoner, WT Wang, F Wang, G Wang, G Wang, XL Wang, Y Wang, Y Wang, ZM Ward, H Watson, JW Webb, JC Westfall, GD Wetzler, A Whitten, C Wieman, H Wissink, SW Witt, R Wood, J Wu, J Xu, N Xu, Z Xu, ZZ Yamamoto, E Yepes, P Yoo, IK Yurevich, VI Zborovsky, I Zhang, H Zhang, WM Zhang, Y Zhang, ZP Zhong, C Zoulkarneev, R Zoulkarneeva, Y Zubarev, AN Zuo, JX CA STAR Collaboration TI Directed flow in Au plus Au collisions at root s(NN)=62.4 GeV SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; TIME PROJECTION CHAMBER; COLLECTIVE FLOW; ANISOTROPIC FLOW; STAR; MULTIPLICITY; DEPENDENCE AB We present the directed flow (v(1)) measured in Au+Au collisions at root s(NN)=62.4 GeV in the midpseudorapidity region parallel to eta parallel to < 1.3 and in the forward pseudorapidity region 2.5 K++ Y for Lambda and Sigma(0) hyperons SO PHYSICAL REVIEW C LA English DT Article ID PHOTON ENERGIES; PHOTOPRODUCTION; HYDROGEN; MESONS; RESONANCES; POLARIZATION; K&LAMBDA; P(GAMMA; K+; K&SIGMA0 AB High-statistics cross sections for the reactions gamma+p -> K++Lambda and gamma+p -> K++Sigma(0) have been measured using CLAS at Jefferson Lab for center-of-mass energies W between 1.6 and 2.53 GeV, and for -0.85 < cos theta(K)(+c.m.)<+0.95. In the K(+)Lambda channel we confirm a resonance-like structure near W=1.9 GeV at backward kaon angles. The position and width of this structure change with angle, indicating that more than one resonance is likely playing a role. The K(+)Lambda channel at forward angles and all energies is well described by a t-channel scaling characteristic of Regge exchange, whereas the same scaling applied to the K(+)Sigma(0) channel is less successful. Several existing theoretical models are compared to the data, but none provide a good representation of the results. C1 Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Arizona State Univ, Tempe, AZ 85287 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Catholic Univ Amer, Washington, DC 20064 USA. CEA Saclay, Serv Phys Nucl, F-91191 Gif Sur Yvette, France. Christopher Newport Univ, Newport News, VA 23606 USA. Univ Connecticut, Storrs, CT 06269 USA. Duke Univ, Durham, NC 27708 USA. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Florida Int Univ, Miami, FL 33199 USA. Florida State Univ, Tallahassee, FL 32306 USA. George Washington Univ, Washington, DC 20052 USA. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Idaho State Univ, Pocatello, ID 83209 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy. Inst Phys Nucl ORSAY, Orsay, France. Inst Theoret & Expt Phys, RU-117259 Moscow, Russia. James Madison Univ, Harrisonburg, VA 22807 USA. Kyungpook Natl Univ, Taegu 702701, South Korea. MIT, Cambridge, MA 02139 USA. Univ Massachusetts, Amherst, MA 01003 USA. Moscow MV Lomonosov State Univ, Gen Nucl Phys Inst, RU-119899 Moscow, Russia. Univ New Hampshire, Durham, NH 03824 USA. Norfolk State Univ, Norfolk, VA 23504 USA. Ohio Univ, Athens, OH 45701 USA. Old Dominion Univ, Norfolk, VA 23529 USA. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Rensselaer Polytech Inst, Troy, NY 12180 USA. Rice Univ, Houston, TX 77005 USA. Univ Richmond, Richmond, VA 23173 USA. Univ S Carolina, Columbia, SC 29208 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Union Coll, Schenectady, NY 12308 USA. Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA. Univ Virginia, Charlottesville, VA 22901 USA. Coll William & Mary, Williamsburg, VA 23187 USA. Yerevan Phys Inst, Yerevan 375036, Armenia. RP Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. RI riccardi, gabriele/A-9269-2012; Quinn, Brian/N-7343-2014; Zhang, Jixie/A-1461-2016; Bektasoglu, Mehmet/A-2074-2012; Zana, Lorenzo/H-3032-2012; Zhao, Bo/J-6819-2012; Protopopescu, Dan/D-5645-2012; Ireland, David/E-8618-2010; Osipenko, Mikhail/N-8292-2015; Schumacher, Reinhard/K-6455-2013; Brooks, William/C-8636-2013; Sabatie, Franck/K-9066-2015; Meyer, Curtis/L-3488-2014; Ishkhanov, Boris/E-1431-2012; Kuleshov, Sergey/D-9940-2013 OI Quinn, Brian/0000-0003-2800-986X; Zhao, Bo/0000-0003-3171-5335; Ireland, David/0000-0001-7713-7011; Osipenko, Mikhail/0000-0001-9618-3013; Schumacher, Reinhard/0000-0002-3860-1827; Brooks, William/0000-0001-6161-3570; Sabatie, Franck/0000-0001-7031-3975; Meyer, Curtis/0000-0001-7599-3973; Kuleshov, Sergey/0000-0002-3065-326X NR 52 TC 207 Z9 208 U1 2 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD MAR PY 2006 VL 73 IS 3 AR 035202 DI 10.1103/PhysRevC.73.035202 PG 36 WC Physics, Nuclear SC Physics GA 028DK UT WOS:000236466900065 ER PT J AU Chankova, R Schiller, A Agvaanluvsan, U Algin, E Bernstein, LA Guttormsen, M Ingebretsen, F Lonnroth, T Messelt, S Mitchell, GE Rekstad, J Siem, S Larsen, AC Voinov, A Odegard, S AF Chankova, R Schiller, A Agvaanluvsan, U Algin, E Bernstein, LA Guttormsen, M Ingebretsen, F Lonnroth, T Messelt, S Mitchell, GE Rekstad, J Siem, S Larsen, AC Voinov, A Odegard, S TI Level densities and thermodynamical quantities of heated Mo93-98 isotopes SO PHYSICAL REVIEW C LA English DT Article ID STATISTICAL GAMMA-DECAY; STRENGTH FUNCTION; ATOMIC-NUCLEI; SPECTRA; MODEL; TRANSITION; DY-162; PHASE AB Level densities for Mo93-98 have been extracted using the ( He-3, alpha gamma) and ( He-3, He-3'gamma) reactions. From the level densities thermodynamical quantities such as temperature and heat capacity can be deduced. Data have been analyzed by utilizing both the microcanonical and the canonical ensemble. Structures in the microcanonical temperature are consistent with the breaking of nucleon Cooper pairs. The S shape of the heat capacity curves found within the canonical ensemble is interpreted as consistent with a pairing phase transition with a critical temperature for the quenching of pairing correlations at T-c similar to 0.7-1.0MeV. C1 Univ Oslo, Dept Phys, N-0316 Oslo, Norway. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. N Carolina State Univ, Raleigh, NC 27695 USA. Triangle Univ Nucl Lab, Durham, NC 27708 USA. Osmangazi Univ, Dept Phys, TR-26480 Meselik, Eskisehir, Turkey. Abo Akad Univ, Dept Phys, FIN-20500 Turku, Finland. Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA. Joint Nucl Res Inst, Frank Lab Neutron Phys, RU-141980 Moscow, Russia. RP Chankova, R (reprint author), Univ Oslo, Dept Phys, POB 1048, N-0316 Oslo, Norway. EM rositsa.chankova@fys.uio.no NR 51 TC 33 Z9 33 U1 0 U2 4 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 MAR PY 2006 VL 73 IS 3 AR 034311 DI 10.1103/PhysRevC.73.034311 PG 12 WC Physics, Nuclear SC Physics GA 028DK UT WOS:000236466900023 ER PT J AU Gade, A Janssens, RVF Bazin, D Brown, BA Campbell, CM Carpenter, MP Cook, JM Deacon, AN Dinca, DC Freeman, SJ Glasmacher, T Kay, BP Mantica, PF Mueller, WF Terry, JR Zhu, S AF Gade, A Janssens, RVF Bazin, D Brown, BA Campbell, CM Carpenter, MP Cook, JM Deacon, AN Dinca, DC Freeman, SJ Glasmacher, T Kay, BP Mantica, PF Mueller, WF Terry, JR Zhu, S TI Spectroscopy of the odd-odd fp-shell nucleus Sc-52 from secondary fragmentation SO PHYSICAL REVIEW C LA English DT Article ID NEUTRON-RICH NUCLEI; COULOMB-EXCITATION; MODEL; CLOSURE AB The odd-odd fp-shell nucleus Sc-52 was investigated using in-beam gamma-ray spectroscopy following secondary fragmentation of a V-55 and Cr-57 cocktail beam. Aside from the known gamma-ray transition at 674(5) keV, a new decay at E-gamma=212(3) keV was observed. It is attributed to the depopulation of a low-lying excited level. This new state is discussed in the framework of shell-model calculations with the GXPF1, GXPF1A, and KB3G effective interactions. These calculations are found to be fairly robust for the low-lying level scheme of Sc-52 irrespective of the choice of the effective interaction. In addition, the frequency of spin values predicted by the shell model is successfully modeled by a spin distribution formulated in a statistical approach with an empirical, energy-independent spin-cutoff parameter. C1 Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Univ Manchester, Dept Phys & Astron, Schuster Lab, Manchester M13 9PL, Lancs, England. Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA. RP Gade, A (reprint author), Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. RI Gade, Alexandra/A-6850-2008; Glasmacher, Thomas/C-4462-2008; Campbell, Christopher/B-9429-2008; Freeman, Sean/B-1280-2010; Kay, Benjamin/F-3291-2011; Glasmacher, Thomas/H-9673-2014; Carpenter, Michael/E-4287-2015 OI Gade, Alexandra/0000-0001-8825-0976; Freeman, Sean/0000-0001-9773-4921; Kay, Benjamin/0000-0002-7438-0208; Glasmacher, Thomas/0000-0001-9436-2448; Carpenter, Michael/0000-0002-3237-5734 NR 37 TC 9 Z9 9 U1 1 U2 2 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 MAR PY 2006 VL 73 IS 3 AR 037309 DI 10.1103/PhysRevC.73.037309 PG 4 WC Physics, Nuclear SC Physics GA 028DK UT WOS:000236466900097 ER PT J AU Gudkov, V Greene, GL Calarco, JR AF Gudkov, V Greene, GL Calarco, JR TI General classification and analysis of neutron beta-decay experiments SO PHYSICAL REVIEW C LA English DT Article ID RADIATIVE-CORRECTIONS; WEAK INTERACTIONS; TESTS; MODEL AB A general analysis of the sensitivities of neutron beta-decay experiments to manifestations of possible interaction beyond the standard model is carried out. In a consistent fashion, we take into account all known radiative and recoil corrections arising in the standard model. This provides a description of angular correlations in neutron decay in terms of one parameter, which is accurate to the level of similar to 10(-5). Based on this general expression, we present an analysis of the sensitivities to new physics for selected neutron decay experiments. We emphasize that the usual parametrization of experiments in terms of the tree-level coefficients a,A, and B is inadequate when the experimental sensitivities are at the same or higher level relative to the size of the corrections to the tree-level description. C1 Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ New Hampshire, Dept Phys, Durham, NH 03824 USA. RP Gudkov, V (reprint author), Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA. EM gudkov@sc.edu; greenegl@ornl.gov; calarco@unh.edu NR 23 TC 13 Z9 13 U1 1 U2 4 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 MAR PY 2006 VL 73 IS 3 AR 035501 DI 10.1103/PhysRevC.73.035501 PG 7 WC Physics, Nuclear SC Physics GA 028DK UT WOS:000236466900079 ER PT J AU Klimenko, AV Kuhn, SE Butuceanu, C Egiyan, KS Griffioen, KA Adams, G Ambrozewicz, P Anghinolfi, M Asryan, G Avakian, H Bagdasaryan, H Baillie, N Ball, JP Baltzell, NA Barrow, S Batourine, V Battaglieri, M Bedlinskiy, I Bektasoglu, M Bellis, M Benmouna, N Biselli, AS Bouchigny, S Boiarinov, S Bradford, R Branford, D Brooks, WK Bultmann, S Burkert, VD Calarco, JR Careccia, SL Carman, DS Cazes, A Chen, S Cole, PL Coltharp, P Cords, D Corvisiero, P Crabb, D Cummings, JP Dashyan, NB DeVita, R Sanctis, ED Degtyarenko, PV Denizli, H Dennis, L Dharmawardane, KV Djalali, C Dodge, GE Donnelly, J Doughty, D Dugger, M Dytman, S Dzyubak, OP Egiyan, H Elouadrhiri, L Eugenio, P Fatemi, R Fedotov, G Fersch, RG Feuerbach, RJ Funsten, H Garcon, M Gavalian, G Gilfoyle, GP Giovanetti, KL Girod, FX Goetz, JT Gonenc, A Gordon, CIO Gothe, RW Guidal, M Guillo, M Guler, N Guo, L Gyurjyan, V Hadjidakis, C Hakobyan, RS Hardie, J Hersman, FW Hicks, K Hleiqawi, I Holtrop, M Hyde-Wright, CE Ilieva, Y Ireland, DG Ishkhanov, BS Ito, MM Jenkins, D Jo, HS Joo, K Juengst, HG Kellie, JD Khandaker, M Kim, W Klein, A Klein, FJ Kossov, M Kramer, LH Kubarovsky, V Kuhn, J Kuleshov, SV Lachniet, J Laget, JM Langheinrich, J Lawrence, D Li, J Livingston, K McAleer, S McKinnon, B McNabb, JWC Mecking, BA Mehrabyan, S Melone, JJ Mestayer, MD Meyer, CA Mibe, T Mikhailov, K Minehart, R Mirazita, M Miskimen, R Mokeev, V Morand, L Morrow, SA Mueller, J Mutchler, GS Nadel-Turonski, P Napolitano, J Nasseripour, R Niccolai, S Niculescu, G Niculescu, I Niczyporuk, BB Niyazov, RA Nozar, M O'Rielly, GV Osipenko, M Ostrovidov, AI Park, K Pasyuk, E Paterson, C Pierce, J Pivnyuk, N Pocanic, D Pogorelko, O Pozdniakov, S Preedom, BM Price, JW Prok, Y Protopopescu, D Raue, BA Riccardi, G Ricco, G Ripani, M Ritchie, BG Ronchetti, F Rosner, G Rossi, P Sabatie, F Salgado, C Santoro, JP Sapunenko, V Schumacher, RA Serov, VS Sharabian, YG Skabelin, AV Smith, ES Smith, LC Sober, DI Stavinsky, A Stepanyan, SS Stepanyan, S Stokes, BE Stoler, P Strauch, S Taiuti, M Tedeschi, DJ Thoma, U Tkabladze, A Tkachenko, S Todor, L Tur, C Ungaro, M Vineyard, MF Vlassov, AV Weinstein, LB Weygand, DP Williams, M Wolin, E Wood, MH Yegneswaran, A Zana, L Zhang, J Zhao, B AF Klimenko, AV Kuhn, SE Butuceanu, C Egiyan, KS Griffioen, KA Adams, G Ambrozewicz, P Anghinolfi, M Asryan, G Avakian, H Bagdasaryan, H Baillie, N Ball, JP Baltzell, NA Barrow, S Batourine, V Battaglieri, M Bedlinskiy, I Bektasoglu, M Bellis, M Benmouna, N Biselli, AS Bouchigny, S Boiarinov, S Bradford, R Branford, D Brooks, WK Bultmann, S Burkert, VD Calarco, JR Careccia, SL Carman, DS Cazes, A Chen, S Cole, PL Coltharp, P Cords, D Corvisiero, P Crabb, D Cummings, JP Dashyan, NB DeVita, R Sanctis, ED Degtyarenko, PV Denizli, H Dennis, L Dharmawardane, KV Djalali, C Dodge, GE Donnelly, J Doughty, D Dugger, M Dytman, S Dzyubak, OP Egiyan, H Elouadrhiri, L Eugenio, P Fatemi, R Fedotov, G Fersch, RG Feuerbach, RJ Funsten, H Garcon, M Gavalian, G Gilfoyle, GP Giovanetti, KL Girod, FX Goetz, JT Gonenc, A Gordon, CIO Gothe, RW Guidal, M Guillo, M Guler, N Guo, L Gyurjyan, V Hadjidakis, C Hakobyan, RS Hardie, J Hersman, FW Hicks, K Hleiqawi, I Holtrop, M Hyde-Wright, CE Ilieva, Y Ireland, DG Ishkhanov, BS Ito, MM Jenkins, D Jo, HS Joo, K Juengst, HG Kellie, JD Khandaker, M Kim, W Klein, A Klein, FJ Kossov, M Kramer, LH Kubarovsky, V Kuhn, J Kuleshov, SV Lachniet, J Laget, JM Langheinrich, J Lawrence, D Li, J Livingston, K McAleer, S McKinnon, B McNabb, JWC Mecking, BA Mehrabyan, S Melone, JJ Mestayer, MD Meyer, CA Mibe, T Mikhailov, K Minehart, R Mirazita, M Miskimen, R Mokeev, V Morand, L Morrow, SA Mueller, J Mutchler, GS Nadel-Turonski, P Napolitano, J Nasseripour, R Niccolai, S Niculescu, G Niculescu, I Niczyporuk, BB Niyazov, RA Nozar, M O'Rielly, GV Osipenko, M Ostrovidov, AI Park, K Pasyuk, E Paterson, C Pierce, J Pivnyuk, N Pocanic, D Pogorelko, O Pozdniakov, S Preedom, BM Price, JW Prok, Y Protopopescu, D Raue, BA Riccardi, G Ricco, G Ripani, M Ritchie, BG Ronchetti, F Rosner, G Rossi, P Sabatie, F Salgado, C Santoro, JP Sapunenko, V Schumacher, RA Serov, VS Sharabian, YG Skabelin, AV Smith, ES Smith, LC Sober, DI Stavinsky, A Stepanyan, SS Stepanyan, S Stokes, BE Stoler, P Strauch, S Taiuti, M Tedeschi, DJ Thoma, U Tkabladze, A Tkachenko, S Todor, L Tur, C Ungaro, M Vineyard, MF Vlassov, AV Weinstein, LB Weygand, DP Williams, M Wolin, E Wood, MH Yegneswaran, A Zana, L Zhang, J Zhao, B CA CLAS Collaboration TI Electron scattering from high-momentum neutrons in deuterium SO PHYSICAL REVIEW C LA English DT Article ID FINAL-STATE INTERACTION; NUCLEI; PROTON; TARGETS; DEPENDENCE; RATIO; IRON; DIS; FIT AB We report results from an experiment measuring the semiinclusive reaction H-2(e,e(')p(s)) in which the proton p(s) is moving at a large angle relative to the momentum transfer. If we assume that the proton was a spectator to the reaction taking place on the neutron in deuterium, the initial state of that neutron can be inferred. This method, known as spectator tagging, can be used to study electron scattering from high-momentum (off-shell) neutrons in deuterium. The data were taken with a 5.765 GeV electron beam on a deuterium target in Jefferson Laboratory's Hall B, using the CEBAF large acceptance spectrometer. A reduced cross section was extracted for different values of final state missing mass W-*, backward proton momentum p(s)(->), and momentum transfer Q(2). The data are compared to a simple plane wave impulse approximation (PWIA) spectator model. A strong enhancement in the data observed at transverse kinematics is not reproduced by the PWIA model. This enhancement can likely be associated with the contribution of final state interactions (FSI) that were not incorporated into the model. Within the framework of the simple spectator model, a "bound neutron structure function" F-2n(eff) was extracted as a function of W-* and the scaling variable x(*) at extreme backward kinematics, where the effects of FSI appear to be smaller. For p(s)> 0.4 GeV/c, where the neutron is far off-shell, the model overestimates the value of F-2n(eff) in the region of x(*) between 0.25 and 0.6. A dependence of the bound neutron structure function on the neutron's "off-shell-ness" is one possible effect that can cause the observed deviation. C1 Arizona State Univ, Tempe, AZ 85287 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Catholic Univ Amer, Washington, DC 20064 USA. CEA Saclay, Serv Phys Nucl, F-91191 Gif Sur Yvette, France. Christopher Newport Univ, Newport News, VA 23606 USA. Univ Connecticut, Storrs, CT 06269 USA. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Florida Int Univ, Miami, FL 33199 USA. Florida State Univ, Tallahassee, FL 32306 USA. George Washington Univ, Washington, DC 20052 USA. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Idaho State Univ, Pocatello, ID 83209 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy. Inst Phys Nucl Orsay, Orsay, France. Univ Bonn, Inst Strahlen & Kernphys, D-5300 Bonn, Germany. Inst Theoret & Expt Phys, RU-117259 Moscow, Russia. James Madison Univ, Harrisonburg, VA 22807 USA. Kyungpook Natl Univ, Taegu 702701, South Korea. MIT, Cambridge, MA 02139 USA. Univ Massachusetts, Amherst, MA 01003 USA. Moscow MV Lomonosov State Univ, Gen Nucl Phys Inst, RU-119899 Moscow, Russia. Univ New Hampshire, Durham, NH 03824 USA. Norfolk State Univ, Norfolk, VA 23504 USA. Ohio Univ, Athens, OH 45701 USA. Old Dominion Univ, Norfolk, VA 23529 USA. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Rensselaer Polytech Inst, Troy, NY 12180 USA. Rice Univ, Houston, TX 77005 USA. Sakarya Univ, Sakarya, Turkey. Univ Richmond, Richmond, VA 23173 USA. Univ S Carolina, Columbia, SC 29208 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Union Coll, Schenectady, NY 12308 USA. Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA. Univ Virginia, Charlottesville, VA 22901 USA. Coll William & Mary, Williamsburg, VA 23187 USA. Yerevan Phys Inst, Yerevan 375036, Armenia. RP Klimenko, AV (reprint author), Arizona State Univ, Tempe, AZ 85287 USA. EM klimenko@lanl.gov; skuhn@odu.edu RI Zana, Lorenzo/H-3032-2012; Ishkhanov, Boris/E-1431-2012; Zhao, Bo/J-6819-2012; Brooks, William/C-8636-2013; Kuleshov, Sergey/D-9940-2013; Schumacher, Reinhard/K-6455-2013; Meyer, Curtis/L-3488-2014; Sabatie, Franck/K-9066-2015; Osipenko, Mikhail/N-8292-2015; Ireland, David/E-8618-2010; Bektasoglu, Mehmet/A-2074-2012; Protopopescu, Dan/D-5645-2012; riccardi, gabriele/A-9269-2012; Zhang, Jixie/A-1461-2016; OI Zhao, Bo/0000-0003-3171-5335; Brooks, William/0000-0001-6161-3570; Kuleshov, Sergey/0000-0002-3065-326X; Schumacher, Reinhard/0000-0002-3860-1827; Meyer, Curtis/0000-0001-7599-3973; Sabatie, Franck/0000-0001-7031-3975; Osipenko, Mikhail/0000-0001-9618-3013; Ireland, David/0000-0001-7713-7011; Sapunenko, Vladimir/0000-0003-1877-9043; Hyde, Charles/0000-0001-7282-8120; Bellis, Matthew/0000-0002-6353-6043 NR 45 TC 23 Z9 23 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 EI 1089-490X J9 PHYS REV C JI Phys. Rev. C PD MAR PY 2006 VL 73 IS 3 AR 035212 DI 10.1103/PhysRevC.73.035212 PG 14 WC Physics, Nuclear SC Physics GA 028DK UT WOS:000236466900075 ER PT J AU Marrone, S Abbondanno, U Aerts, G Alvarez-Velarde, F Alvarez-Pol, H Andriamonje, S Andrzejewski, J Badurek, G Baumann, P Becvar, F Benlliure, J Berthomieux, E Calvino, F Cano-Ott, D Capote, R Cennini, P Chepel, V Chiaveri, E Colonna, N Cortes, G Cortina, D Couture, A Cox, J Dababneh, S Dahlfors, M David, S Dolfini, R Domingo-Pardo, C Duran-Escribano, I Embid-Segura, M Ferrant, L Ferrari, A Ferreira-Marques, R Frais-Koelbl, H Fujii, K Furman, WI Gallino, R Goncalves, IF Gonzalez-Romero, E Goverdovski, A Gramegna, F Griesmayer, E Gunsing, F Haas, B Haight, R Heil, M Herrera-Martinez, A Isaev, S Jericha, E Kappeler, F Kadi, Y Karadimos, D Kerveno, M Ketlerov, V Koehler, PE Konovalov, V Kritcka, M Lamboudis, C Leeb, H Lindote, A Lopes, MI Lozano, M Lukic, S Marganiec, J Martinez-Val, J Mastinu, PF Mengoni, A Milazzo, PM Molina-Coballes, A Moreau, C Mosconi, M Neves, F Oberhummer, H O'Brien, S Pancin, J Papaevangelou, T Paradela, C Pavlik, A Pavlopoulos, P Perlado, JM Perrot, L Pignatari, M Pigni, MT Plag, R Plompen, A Plukis, A Poch, A Policarpo, A Pretel, C Quesada, JM Raman, S Rapp, W Rauscher, T Reifarth, R Rosetti, M Rubbia, C Rudolf, G Rullhusen, P Salgado, J Soares, JC Stephan, C Tagliente, G Tain, JL Tassan-Got, L Tavora, LMN Terlizzi, R Vannini, G Vaz, P Ventura, A Villamarin-Fernandez, D Vincente-Vincente, M Vlachoudis, V Voss, F Wendler, H Wiescher, M Wisshak, K AF Marrone, S Abbondanno, U Aerts, G Alvarez-Velarde, F Alvarez-Pol, H Andriamonje, S Andrzejewski, J Badurek, G Baumann, P Becvar, F Benlliure, J Berthomieux, E Calvino, F Cano-Ott, D Capote, R Cennini, P Chepel, V Chiaveri, E Colonna, N Cortes, G Cortina, D Couture, A Cox, J Dababneh, S Dahlfors, M David, S Dolfini, R Domingo-Pardo, C Duran-Escribano, I Embid-Segura, M Ferrant, L Ferrari, A Ferreira-Marques, R Frais-Koelbl, H Fujii, K Furman, WI Gallino, R Goncalves, IF Gonzalez-Romero, E Goverdovski, A Gramegna, F Griesmayer, E Gunsing, F Haas, B Haight, R Heil, M Herrera-Martinez, A Isaev, S Jericha, E Kappeler, F Kadi, Y Karadimos, D Kerveno, M Ketlerov, V Koehler, PE Konovalov, V Kritcka, M Lamboudis, C Leeb, H Lindote, A Lopes, MI Lozano, M Lukic, S Marganiec, J Martinez-Val, J Mastinu, PF Mengoni, A Milazzo, PM Molina-Coballes, A Moreau, C Mosconi, M Neves, F Oberhummer, H O'Brien, S Pancin, J Papaevangelou, T Paradela, C Pavlik, A Pavlopoulos, P Perlado, JM Perrot, L Pignatari, M Pigni, MT Plag, R Plompen, A Plukis, A Poch, A Policarpo, A Pretel, C Quesada, JM Raman, S Rapp, W Rauscher, T Reifarth, R Rosetti, M Rubbia, C Rudolf, G Rullhusen, P Salgado, J Soares, JC Stephan, C Tagliente, G Tain, JL Tassan-Got, L Tavora, LMN Terlizzi, R Vannini, G Vaz, P Ventura, A Villamarin-Fernandez, D Vincente-Vincente, M Vlachoudis, V Voss, F Wendler, H Wiescher, M Wisshak, K CA n-TOF Collaborat TI Measurement of the Sm-151(n, gamma) cross section from 0.6 eV to 1 MeV via the neutron time-of-flight technique at the CERN n_TOF facility SO PHYSICAL REVIEW C LA English DT Article ID NUCLEAR-LEVEL DENSITY; GIANT BRANCH STARS; METAL-POOR STARS; S-PROCESS; TRANSMISSION MEASUREMENTS; CAPTURE; NUCLEOSYNTHESIS; ISOTOPES; SYSTEM; SAMARIUM AB The Sm-151(n,gamma) cross section was measured with the time-of-flight technique from 0.6 eV up to 1 MeV relative to the Au standard with an overall uncertainty of typically 6%. Neutrons were produced by spallation at the innovative n_TOF facility at CERN; the gamma rays from capture events were detected with organic C6D6 scintillators. Experimental setup and data analysis procedures are described with emphasis on the corrections for detection efficiency, background subtraction, and neutron flux determination. At low energies, resonances could be resolved up to about 1 keV, yielding a resonance integral of 3575 +/- 210 b, an average s-wave resonance spacing of < D-0>=1.49 +/- 0.07 eV, and a neutron strength function of < S-0>=(3.87 +/- 0.33)x10(-4). Maxwellian-averaged capture cross sections are reported for thermal energies between 5 and 100 keV. These results are of relevance for nuclear structure studies, nuclear astrophysics, and nuclear technology. The new value of the Maxwellian-averaged cross section at kT=30 keV is 3.08 +/- 0.15 b, considerably larger than previous theoretical estimates, and provides better constraints for the thermodynamic conditions during the occurrence of the slow neutron capture process in low-mass stars during their asymptotic giant branch phase. C1 Ist Nazl Fis Nucl, Dipartimento Fis, I-70126 Bari, Italy. Vienna Univ Technol, Atominst Osterreichischen Univ, A-1060 Vienna, Austria. Univ Vienna, Inst Isotopenforsch & Kernphys, Vienna, Austria. Fachsch Wiener Neustadt, Vienna, Austria. IAEA, NAPC Nucl Data Sect, Vienna, Austria. CEC JRC IRMM, Geel, Belgium. IPN, IN2P3, CNRS, Orsay, France. CNRS, IN2P3, IreS, Strasbourg, France. CNRS, IN2P3, CENBG, Bordeaux, France. CEA Saclay, DSM, DAPNIA, SPhN, F-91191 Gif Sur Yvette, France. Pole Univ Leonard Vinci, Paris, France. Forschungszentrum Karlsruhe, Inst Kernphys, Karlsruhe, Germany. Univ Ioannina, GR-45110 Ioannina, Greece. Aristotle Univ Thessaloniki, GR-54006 Thessaloniki, Greece. ENEA, Bologna, Italy. Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy. Dipartimento Fis, Bologna, Italy. Ist Nazl Fis Nucl, I-40126 Bologna, Italy. Dipartimento Fis Gen, Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Ist Nazl Fis Nucl, Sez Trieste, Trieste, Italy. Univ Pavia, I-27100 Pavia, Italy. Univ Lodz, PL-90131 Lodz, Poland. Univ Coimbra, LIP Coimbra, Coimbra, Portugal. Univ Coimbra, Dept Fis, P-3000 Coimbra, Portugal. Inst Tecnol & Nucl, Lisbon, Portugal. Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna, Russia. Inst Phys & Power Engn, Obninsk, Russia. Ctr Invest Energet Medioambientales & Tecnol, Madrid, Spain. Univ Valencia, CSIC, Valencia, Spain. Univ Politecn Madrid, Madrid, Spain. Univ Seville, Seville, Spain. Univ Santiago de Compostela, Santiago De Compostela, Spain. Univ Politecn Cataluna, Barcelona, Spain. CERN, Geneva, Switzerland. Univ Basel, Dept Phys & Astron, Basel, Switzerland. Los Alamos Natl Lab, Los Alamos, NM USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Notre Dame, Notre Dame, IN 46556 USA. Charles Univ Prague, Prague, Czech Republic. RP Ist Nazl Fis Nucl, Dipartimento Fis, Via Orabona 4, I-70126 Bari, Italy. EM stefano.marrone@ba.infn.it RI Lopes, Isabel/A-1806-2014; Cortes, Guillem/B-6869-2014; Tain, Jose L./K-2492-2014; Cano Ott, Daniel/K-4945-2014; Quesada Molina, Jose Manuel/K-5267-2014; Rauscher, Thomas/D-2086-2009; Jericha, Erwin/A-4094-2011; Ventura, Alberto/B-9584-2011; Martinez-Val, Jose/D-3871-2013; Lindote, Alexandre/H-4437-2013; Neves, Francisco/H-4744-2013; Vaz, Pedro/K-2464-2013; Mengoni, Alberto/I-1497-2012; Gonzalez Romero, Enrique/L-7561-2014; Pretel Sanchez, Carme/L-8287-2014; Capote Noy, Roberto/M-1245-2014; Alvarez Pol, Hector/F-1930-2011; Cortina-Gil, Dolores/H-9626-2015; Paradela, Carlos/J-1492-2012; Gramegna, Fabiana/B-1377-2012; Papaevangelou, Thomas/G-2482-2016; Calvino, Francisco/K-5743-2014; Benlliure, Jose/K-8407-2014; Dababneh, Saed/E-7281-2017 OI Lopes, Isabel/0000-0003-0419-903X; Cano Ott, Daniel/0000-0002-9568-7508; Quesada Molina, Jose Manuel/0000-0002-2038-2814; Rauscher, Thomas/0000-0002-1266-0642; Jericha, Erwin/0000-0002-8663-0526; Ventura, Alberto/0000-0001-6748-7931; Martinez-Val, Jose/0000-0002-6325-6981; Lindote, Alexandre/0000-0002-7965-807X; Neves, Francisco/0000-0003-3635-1083; Vaz, Pedro/0000-0002-7186-2359; Mengoni, Alberto/0000-0002-2537-0038; Gonzalez Romero, Enrique/0000-0003-2376-8920; Capote Noy, Roberto/0000-0002-1799-3438; Alvarez Pol, Hector/0000-0001-9643-6252; Cortina-Gil, Dolores/0000-0001-7672-9912; Gramegna, Fabiana/0000-0001-6112-0602; Papaevangelou, Thomas/0000-0003-2829-9158; Calvino, Francisco/0000-0002-7198-4639; Benlliure, Jose/0000-0002-5114-1298; Dababneh, Saed/0000-0002-7376-1084 NR 68 TC 36 Z9 37 U1 2 U2 13 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD MAR PY 2006 VL 73 IS 3 AR 034604 DI 10.1103/PhysRevC.73.034604 PG 18 WC Physics, Nuclear SC Physics GA 028DK UT WOS:000236466900040 ER PT J AU Stetcu, I Barrett, BR Navratil, P Vary, JP AF Stetcu, I Barrett, BR Navratil, P Vary, JP TI Long- and short-range correlations in the ab-initio no-core shell model SO PHYSICAL REVIEW C LA English DT Article ID EFFECTIVE OPERATORS; NUCLEI AB In the framework of the ab-initio no-core shell model (NCSM), we describe the longitudinal-longitudinal distribution function, part of the inclusive (e,e(')) longitudinal response. In the two-body cluster approximation, we compute the effective operators consistent with the unitary transformation used to obtain the effective Hamiltonian. When short-range correlations are probed, the results display independence from the model space size and length scale. Long-range correlations are more difficult to model in the NCSM and they can be des-cribed only by increasing the model space or increasing the cluster size. In order to illustrate the model space independence for short-range observables, we present results for a large set of model spaces for He-4, and in 0-4h Omega model spaces for C-12. C1 Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Univ Arizona, Dept Phys, POB 210081, Tucson, AZ 85721 USA. NR 30 TC 16 Z9 17 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD MAR PY 2006 VL 73 IS 3 AR 037307 DI 10.1103/PhysRevC.73.037307 PG 4 WC Physics, Nuclear SC Physics GA 028DK UT WOS:000236466900095 ER PT J AU Timmermans, RGE Penninga, TD Gibson, BF Liou, MK AF Timmermans, RGE Penninga, TD Gibson, BF Liou, MK TI Nucleon-nucleon bremsstrahlung: Anomalous magnetic moment effects SO PHYSICAL REVIEW C LA English DT Article ID PROTON-PROTON BREMSSTRAHLUNG; RELATIVISTIC SPIN CORRECTIONS; PARTIAL-WAVE ANALYSIS; NEUTRON-PROTON; SCATTERING; COLLISIONS; EXCHANGE AB Background: Two soft-photon amplitudes, the two-u-two-t special ( TuTts) amplitude and the Low amplitude, are known to produce quantitatively similar npy cross sections, but they predict quite different pp. cross sections for those kinematic conditions in which the nucleon scattering angles are small ( less than 25 degrees.). Purpose: These two amplitudes have been applied to systematically investigate three different nucleon-nucleon bremsstrahlung ( NN gamma) processes: pp gamma, np gamma, and nn gamma. The nn gamma process is explored for the first time. The primary focus of this work is to investigate the contribution of the proton and the neutron anomalous magnetic moments to all three NN gamma processes for projectile energies above 150 MeV and for laboratory scattering angles (theta(1) and theta(2)) lying between 8 degrees and 40 degrees. Method: A special soft-photon expansion in which the TuTts amplitude is expanded in terms of the Low amplitude plus additional amplitudes is utilized to explore the relationship between the TuTts and Low amplitudes and the reasons why they agree and disagree. We also used the TuTts amplitude to calculate the NN gamma cross section with and without the anomalous magnetic moment contributions to explore the importance of that element of the electromagnetic current. Results: The TuTts amplitude describes well the available pp. cross- section data. The anomalous magnetic moment contribution is ( i) significant in the pp. process when each scattering angle is less than 25 degrees but insignificant when each scattering angle is 40 degrees or greater and ( ii) insignificant in the np gamma process for all scattering angles. The nn. cross sections for the TuTts and Low amplitudes differ substantially for the kinematics investigated. Conclusions: In general, the Low amplitude agrees well with the TuTts amplitude when anomalous magnetic moment effects are not significant, but the two amplitudes can yield quite different predictions when such effects are significant. These findings have enhanced our understanding of the fundamental emission mechanism governing NN gamma processes, and they explain why the TuTts amplitude should be used to describe all three NN gamma processes. C1 Univ Groningen, Theory Grp, Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. CUNY Brooklyn Coll, Dept Phys, Brooklyn, NY 11210 USA. CUNY Brooklyn Coll, Inst Nucl Theory, Brooklyn, NY 11210 USA. RP Timmermans, RGE (reprint author), Univ Groningen, Theory Grp, Kernfys Versneller Inst, Zernikelaan 25, NL-9747 AA Groningen, Netherlands. NR 27 TC 13 Z9 13 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 3 AR 034006 DI 10.1103/PhysRevC.73.034006 PG 20 WC Physics, Nuclear SC Physics GA 028DK UT WOS:000236466900012 ER PT J AU Urban, W Droste, C Rzaca-Urban, T Zlomaniec, A Durell, JL Smith, AG Varley, BJ Ahmad, I AF Urban, W Droste, C Rzaca-Urban, T Zlomaniec, A Durell, JL Smith, AG Varley, BJ Ahmad, I TI Near-yrast structure of the Mo-109 nucleus SO PHYSICAL REVIEW C LA English DT Article ID FISSION FRAGMENTS; ROTATIONAL BANDS; 1ST OBSERVATION; EXCITED-STATES; ISOTOPES; DEFORMATION; REGION; ZR; IDENTIFICATION; SR AB Excited states in Mo-109, populated in the spontaneous fission of Cm-248, were studied using the EUROGAM2 array. Octupole deformation reported previously in Mo-109 was not confirmed. Spin and parity of the ground state were changed. A new band found in this work suggests the 5/2(+)[402] neutron configuration for the ground state. In the 222.2 keV band, the 110.8 and 138.9 keV transitions are of M1 + E2 instead of E1 multipolarity, as reported previously. The 222.2 keV band is explained as the 7/2(-)[523] neutron configuration. C1 Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland. Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England. Argonne Natl Lab, Argonne, IL 60439 USA. RP Urban, W (reprint author), Univ Warsaw, Fac Phys, Ul Hoza 69, PL-00681 Warsaw, Poland. NR 20 TC 0 Z9 0 U1 1 U2 1 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 MAR PY 2006 VL 73 IS 3 AR 037302 DI 10.1103/PhysRevC.73.037302 PG 4 WC Physics, Nuclear SC Physics GA 028DK UT WOS:000236466900090 ER PT J AU Wiringa, RB AF Wiringa, RB TI Pair counting, pion-exchange forces and the structure of light nuclei SO PHYSICAL REVIEW C LA English DT Article ID ENERGY-LEVELS; 1P SHELL AB A simple but useful guide for understanding the structure of light nuclei is presented. It is based on counting the number of interacting pairs in different spin-isospin (S,T) states for a given spatial symmetry and estimating the overall binding according to the sum of sigma(i)(.)sigma(j)tau(i)(.)tau(j) expectation values, as suggested by one-pion exchange. Applied to s- and p-shell nuclei, this simple picture accounts for the relative stability of nuclei as A increases and as T changes across isobars, the saturation of nuclear binding in the p shell, and the tendency to form d,t, or alpha subclusters there. With allowance for pairwise tensor and spin-orbit forces, which are also generated or boosted by pion exchange, the model explains why mixing of different spatial symmetries in ground states increases as T increases across isobars and why, for states of the same spatial symmetry, the ones with greater S are lower in the spectrum. The ordering of some sd-shell intruder levels can also be understood. The success of this simple model supports the idea that one-pion exchange is the dominant force controlling the structure of light nuclei. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Wiringa, RB (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. EM wiringa@anl.gov RI Wiringa, Robert/M-4970-2015 NR 30 TC 20 Z9 20 U1 0 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 EI 1089-490X J9 PHYS REV C JI Phys. Rev. C PD MAR PY 2006 VL 73 IS 3 AR 034317 DI 10.1103/PhysRevC.73.034317 PG 11 WC Physics, Nuclear SC Physics GA 028DK UT WOS:000236466900029 ER PT J AU Wu, CY Hua, H Cline, D Hayes, AB Teng, R Riley, D Clark, RM Fallon, P Goergen, A Macchiavelli, AO Vetter, K AF Wu, CY Hua, H Cline, D Hayes, AB Teng, R Riley, D Clark, RM Fallon, P Goergen, A Macchiavelli, AO Vetter, K TI Evidence for possible shape transitions in neutron-rich Ru isotopes: Spectroscopy of Ru-109,Ru-110,Ru-111,Ru-112 SO PHYSICAL REVIEW C LA English DT Article ID PLUS-QUADRUPOLE MODEL; ENERGY LEVELS; NUCLEI; BANDS; MOMENTS; STATE; DEFORMATIONS; PROLATE; OBLATE; RU-111 AB The spectroscopy of neutron-rich Ru-109,Ru-110,Ru-111,Ru-112 nuclei was studied by measuring the prompt gamma rays that originate from fission fragments, produced by the U-238( alpha, f) fusion-fission reaction, in coincidence with the detection of both fragments. For Ru-109,Ru-111, both the negative-parity ( h(11/2) orbitals) and K = 5/2 positive-parity ( mainly g(7/2) and d(5/2) orbitals) bands were extended to substantially higher spin and excitation energy than known previously. The ground-state and gamma-vibrational bands of Ru-110,Ru-112 also were extended to higher spin, allowing observation of the second band crossing at the rotational frequency of approximate to 450 keV in Ru-112, which is approximate to 50 keV above the first band crossing. At a similar rotational frequency, the first band crossing for the h11/2 band in Ru-111 was observed, which is absent in Ru-109. These band crossings most likely are caused by the alignment of the g(9/2) proton pair. This early onset of the band crossing for the aligned pi g(9/2) orbitals may be evidence of a triaxial shape transition from prolate to oblate occurring in Ru-111. The data together with a comparison of cranked shell-model predictions are presented. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Rochester, Dept Phys, Nucl Struct Res Lab, Rochester, NY 14627 USA. Lawrence Bekeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Wu, CY (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 34 TC 29 Z9 30 U1 0 U2 4 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 MAR PY 2006 VL 73 IS 3 AR 034312 DI 10.1103/PhysRevC.73.034312 PG 10 WC Physics, Nuclear SC Physics GA 028DK UT WOS:000236466900024 ER PT J AU Abazajian, K AF Abazajian, K TI Linear cosmological structure limits on warm dark matter SO PHYSICAL REVIEW D LA English DT Article ID LYMAN-ALPHA FOREST; PROBE WMAP OBSERVATIONS; DIGITAL SKY SURVEY; BACKGROUND POWER SPECTRUM; GALAXY FORMATION; X-RAY; CONSTRAINTS; HALO; SUBSTRUCTURE; REIONIZATION AB I consider constraints from observations on a cutoff scale in clustering due to free streaming of the dark matter in a warm dark matter cosmological model with a cosmological constant. The limits are derived in the framework of a sterile neutrino warm dark matter universe, but can be applied to gravitinos and other models with small-scale suppression in the linear matter power spectrum. With freedom in all cosmological parameters including the free streaming scale of the sterile neutrino dark matter, limits are derived using observations of the fluctuations in the cosmic microwave background, the 3D clustering of galaxies and 1D clustering of gas in the Lyman-alpha (Ly alpha) forest in the Sloan Digital Sky Survey (SDSS), as well as the Ly alpha forest in high-resolution spectroscopic observations. In the most conservative case, using only the SDSS main-galaxy 3D power-spectrum shape, the limit is m(s) > 0.11 keV; including the SDSS Ly alpha forest, this limit improves to m(s) > 1.7 keV. More stringent constraints may be placed from the inferred matter power spectrum from high-resolution Ly alpha forest observations, which has significant systematic uncertainties; in this case, the limit improves to m(s) > 3.0 keV (all at 95% CL). C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Abazajian, K (reprint author), Los Alamos Natl Lab, Div Theoret, MS B285, Los Alamos, NM 87545 USA. NR 61 TC 79 Z9 80 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 6 AR 063513 DI 10.1103/PhysRevD.73.063513 PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DD UT WOS:000236466100030 ER PT J AU Abazajian, K AF Abazajian, K TI Production and evolution of perturbations of sterile neutrino dark matter SO PHYSICAL REVIEW D LA English DT Article ID DIGITAL SKY SURVEY; LY-ALPHA FOREST; GALAXY FORMATION; POWER SPECTRUM; GALACTIC SATELLITES; REIONIZATION; OSCILLATIONS; CONSTRAINTS; MASS; HALO AB Sterile neutrinos, fermions with no standard model couplings [SU(2) singlets], are predicted by most extensions of the standard model, and may be the dark matter. I describe the nonthermal production and linear perturbation evolution in the early universe of this dark matter candidate. I calculate production of sterile neutrino dark matter including effects of Friedmann dynamics dictated by the quark-hadron transition and particle population, the alteration of finite temperature effective mass of active neutrinos due to the presence of thermal leptons, and heating of the coupled species due to the disappearance of degrees of freedom in the plasma. These effects leave the sterile neutrinos with a nontrivial momentum distribution. I also calculate the evolution of sterile neutrino density perturbations in the early universe through the linear regime and provide a fitting function form for the transfer function describing the suppression of small-scale fluctuations for this warm dark matter candidate. The results presented here differ quantitatively from previous work due to the inclusion of the relevant physical effects during the production epoch. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Theoret, MS B285, Los Alamos, NM 87545 USA. NR 64 TC 92 Z9 92 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 6 AR 063506 DI 10.1103/PhysRevD.73.063506 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DD UT WOS:000236466100023 ER PT J AU Abe, K Abe, K Adachi, I Aihara, H Asano, Y Aushev, T Aziz, T Bahinipati, S Bakich, AM Barbero, M Bedny, I Bitenc, U Bizjak, I Bozek, A Bracko, M Brodzicka, J Browder, TE Chang, P Chao, Y Chen, A Chen, KF Chen, WT Cheon, BG Chistov, R Choi, Y Choi, YK Chuvikov, A Dalseno, J Danilov, M Dash, M Dragic, J Drutskoy, A Eidelman, S Fratina, S Gabyshev, N Gershon, T Go, A Gokhroo, G Golob, B Gorisek, A Ha, HC Hara, T Hasegawa, Y Hastings, NC Hayasaka, K Hayashii, H Hazumi, M Hokuue, T Hoshi, Y Hou, S Hou, WS Hsiung, YB Iijima, T Imoto, A Inami, K Ishikawa, A Itoh, R Iwasaki, M Iwasaki, Y Kapusta, P Katayama, N Kawai, H Kawasaki, T Kent, N Khan, HR Kichimi, H Kim, SK Kim, SM Kinoshita, K Korpar, S Krizan, P Krokovny, P Kulasiri, R Kuo, CC Kuzmin, A Kwon, YJ Lee, SE Lesiak, T Limosani, A Lin, SW Liventsev, D Mandl, F Matsumoto, T Matyja, A Mitaroff, W Miyabayashi, K Miyake, H Miyata, H Miyazaki, Y Nagamine, T Nakano, E Nakao, M Natkaniec, Z Nishida, S Nitoh, O Ohshima, T Okabe, T Okuno, S Olsen, SL Ostrowicz, W Ozaki, H Palka, H Park, CW Park, H Park, KS Peak, LS Pestotnik, R Piilonen, LE Poluektov, A Rozanska, M Sakai, Y Sarangi, TR Satoyama, N Schietinger, T Schneider, O Schumann, J Schwanda, C Schwartz, AJ Seidl, R Sevior, ME Shibuya, H Singh, JB Somov, A Stamen, R Stanic, S Staric, M Sumiyoshi, T Suzuki, S Suzuki, SY Takasaki, F Tamai, K Tamura, N Tanaka, M Taylor, GN Teramoto, Y Tian, XC Trabelsi, K Tsuboyama, T Tsukamoto, T Uglov, T Uno, S Urquijo, P Varner, G Villa, S Wang, CH Wang, MZ Watanabe, Y Won, E Xie, QL Yamaguchi, A Yamauchi, M Zhang, LM Zhang, ZP Zhilich, V Zurcher, D AF Abe, K Abe, K Adachi, I Aihara, H Asano, Y Aushev, T Aziz, T Bahinipati, S Bakich, AM Barbero, M Bedny, I Bitenc, U Bizjak, I Bozek, A Bracko, M Brodzicka, J Browder, TE Chang, P Chao, Y Chen, A Chen, KF Chen, WT Cheon, BG Chistov, R Choi, Y Choi, YK Chuvikov, A Dalseno, J Danilov, M Dash, M Dragic, J Drutskoy, A Eidelman, S Fratina, S Gabyshev, N Gershon, T Go, A Gokhroo, G Golob, B Gorisek, A Ha, HC Hara, T Hasegawa, Y Hastings, NC Hayasaka, K Hayashii, H Hazumi, M Hokuue, T Hoshi, Y Hou, S Hou, WS Hsiung, YB Iijima, T Imoto, A Inami, K Ishikawa, A Itoh, R Iwasaki, M Iwasaki, Y Kapusta, P Katayama, N Kawai, H Kawasaki, T Kent, N Khan, HR Kichimi, H Kim, SK Kim, SM Kinoshita, K Korpar, S Krizan, P Krokovny, P Kulasiri, R Kuo, CC Kuzmin, A Kwon, YJ Lee, SE Lesiak, T Limosani, A Lin, SW Liventsev, D Mandl, F Matsumoto, T Matyja, A Mitaroff, W Miyabayashi, K Miyake, H Miyata, H Miyazaki, Y Nagamine, T Nakano, E Nakao, M Natkaniec, Z Nishida, S Nitoh, O Ohshima, T Okabe, T Okuno, S Olsen, SL Ostrowicz, W Ozaki, H Palka, H Park, CW Park, H Park, KS Peak, LS Pestotnik, R Piilonen, LE Poluektov, A Rozanska, M Sakai, Y Sarangi, TR Satoyama, N Schietinger, T Schneider, O Schumann, J Schwanda, C Schwartz, AJ Seidl, R Sevior, ME Shibuya, H Singh, JB Somov, A Stamen, R Stanic, S Staric, M Sumiyoshi, T Suzuki, S Suzuki, SY Takasaki, F Tamai, K Tamura, N Tanaka, M Taylor, GN Teramoto, Y Tian, XC Trabelsi, K Tsuboyama, T Tsukamoto, T Uglov, T Uno, S Urquijo, P Varner, G Villa, S Wang, CH Wang, MZ Watanabe, Y Won, E Xie, QL Yamaguchi, A Yamauchi, M Zhang, LM Zhang, ZP Zhilich, V Zurcher, D TI Study of B-+/--> DCPK +/- and (DCPK +/-)-K-* decays SO PHYSICAL REVIEW D LA English DT Article ID CP-VIOLATION; ASYMMETRIES AB We report a study of the modes B-+/--> DK +/- and B-+/-->(DK +/-)-K-* where D-(*) decays to CP eigenstates. The data sample used contains 275x10(6) B (B) over bar events at the Upsilon(4S) resonance collected by the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. The CP asymmetries obtained for DCPK are: A(1)=0.06 +/- 0.14(stat)+/- 0.05(sys), A(2)=-0.12 +/- 0.14(stat)+/- 0.05(sys) and for (DCPK)-K-*: A(1)(*)=-0.20 +/- 0.22(stat)+/- 0.04(sys), A(2)(*)=0.13 +/- 0.30(stat)+/- 0.08(sys). C1 Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Chiba Univ, Chiba, Japan. Chonnam Natl Univ, Kwangju, South Korea. Univ Cincinnati, Cincinnati, OH 45221 USA. Goethe Univ Frankfurt, D-6000 Frankfurt, Germany. Gyeongsang Natl Univ, Chinju, South Korea. Univ Hawaii, Honolulu, HI 96822 USA. Hiroshima Inst Technol, Hiroshima, Japan. Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China. Inst High Energy Phys, Protvino, Russia. Inst High Energy Phys, Vienna, Austria. Inst Theoret & Expt Phys, Moscow 117259, Russia. Jozef Stefan Inst, Ljubljana, Slovenia. Kanagawa Univ, Yokohama, Kanagawa, Japan. Korea Univ, Seoul 136701, South Korea. Kyoto Univ, Kyoto, Japan. Kyungpook Natl Univ, Taegu 702701, South Korea. Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol Lausanne, CH-1015 Lausanne, Switzerland. Univ Ljubljana, Ljubljana, Slovenia. Univ Maribor, SLO-2000 Maribor, Slovenia. Univ Melbourne, Parkville, Vic 3052, Australia. Nagoya Univ, Nagoya, Aichi, Japan. Nara Womens Univ, Nara 630, Japan. Natl Cent Univ, Chungli 32054, Taiwan. Natl United Univ, Miaoli, Taiwan. Natl Taiwan Univ, Dept Phys, Taipei, Taiwan. H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland. Nippon Dent Univ, Niigata, Japan. Niigata Univ, Niigata, Japan. Nova Gorica Polytech, Nova Gorica, Slovenia. Osaka City Univ, Osaka 558, Japan. Osaka Univ, Suita, Osaka 565, Japan. Panjab Univ, Chandigarh 160014, India. Peking Univ, Beijing 100871, Peoples R China. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Princeton Univ, Princeton, NJ 08544 USA. RIKEN, BNL, Res Ctr, Upton, NY 11973 USA. Saga Univ, Saga, Japan. Univ Sci & Technol China, Hefei 230026, Peoples R China. Seoul Natl Univ, Seoul, South Korea. Shinshu Univ, Nagano, Japan. Sungkyunkwan Univ, Suwon, South Korea. Univ Sydney, Sydney, NSW 2006, Australia. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. Toho Univ, Funabashi, Chiba 274, Japan. Tohoku Gakuin Univ, Tagajo, Miyagi, Japan. Tohoku Univ, Sendai, Miyagi 980, Japan. Univ Tokyo, Dept Phys, Tokyo 113, Japan. Tokyo Inst Technol, Tokyo 152, Japan. Tokyo Metropolitan Univ, Tokyo 158, Japan. Tokyo Univ Agr & Technol, Tokyo, Japan. Toyama Natl Coll Maritime Technol, Toyama, Japan. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA. Yonsei Univ, Seoul 120749, South Korea. Natl Lab High Energy Phys, KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan. RP Natl Lab High Energy Phys, KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan. RI Danilov, Mikhail/C-5380-2014; Krokovny, Pavel/G-4421-2016; Chistov, Ruslan/B-4893-2014; Drutskoy, Alexey/C-8833-2016; Abe, Kazuo/F-6576-2010; Aihara, Hiroaki/F-3854-2010; Nitoh, Osamu/C-3522-2013; Tian, Xinchun/L-2060-2013; Kim, Sun Kee/G-2042-2015; Uglov, Timofey/B-2406-2014; OI Danilov, Mikhail/0000-0001-9227-5164; Krokovny, Pavel/0000-0002-1236-4667; Chistov, Ruslan/0000-0003-1439-8390; Drutskoy, Alexey/0000-0003-4524-0422; Trabelsi, Karim/0000-0001-6567-3036; Aihara, Hiroaki/0000-0002-1907-5964; Tian, Xinchun/0000-0002-6246-0470; Kim, Sun Kee/0000-0002-0013-0775; Uglov, Timofey/0000-0002-4944-1830; HSIUNG, YEE/0000-0003-4801-1238; Krizan, Peter/0000-0002-4967-7675; CHANG, PAO-TI/0000-0003-4064-388X NR 17 TC 38 Z9 39 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 5 AR 051106 DI 10.1103/PhysRevD.73.051106 PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800006 ER PT J AU Abulencia, A Acosta, D Adelman, J Affolder, T Akimoto, T Albrow, MG Ambrose, D Amerio, S Amidei, D Anastassov, A Anikeev, K Annovi, A Antos, J Aoki, M Apollinari, G Arguin, JF Arisawa, T Artikov, A Ashmanskas, W Attal, A Azfar, F Azzi-Bacchetta, P Azzurri, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Bartsch, V Bauer, G Bedeschi, F Behari, S Belforte, S Bellettini, G Bellinger, J Belloni, A Ben-Haim, E Benjamin, D Beretvas, A Beringer, J Berry, T Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Boisvert, V Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bourov, S Boveia, A Brau, B Bromberg, C Brubaker, E Budagov, J Budd, HS Budd, S Burkett, K Busetto, G Bussey, P Byrum, KL Cabrera, S Campanelli, M Campbell, M Canelli, F Canepa, A Carlsmith, D Carosi, R Carron, S Casarsa, M Castro, A Catastini, P Cauz, D Cavalli-Sforza, M Cerri, A Cerrito, L Chang, SH Chapman, J Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Cho, I Cho, K Chokheli, D Chou, JP Chu, PH Chuang, SH Chung, K Chung, WH Chung, YS Ciljak, M Ciobanu, CI Ciocci, MA Clark, A Clark, D Coca, M Connolly, A Convery, ME Conway, J Cooper, B Copic, K Cordelli, M Cortiana, G Cruz, A Cuevas, J Culbertson, R Cyr, D DaRonco, S D'Auria, S D'onofrio, M Dagenhart, D de Barbaro, P De Cecco, S Deisher, A De Lentdecker, G Dell'Orso, M Demers, S Demortier, L Deng, J Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, J DiTuro, P Dorr, C Dominguez, A Donati, S Donega, M Dong, P Donini, J Dorigo, T Dube, S Ebina, K Efron, J Ehlers, J Erbacher, R Errede, D Errede, S Eusebi, R Fang, HC Farrington, S Fedorko, I Fedorko, WT Feild, RG Feindt, M Fernandez, JP Field, R Flanagan, G Flores-Castillo, LR Foland, A Forrester, S Foster, GW Franklin, M Freeman, JC Fujii, Y Furic, I Gajjar, A Gallinaro, M Galyardt, J Garcia, JE Sciverez, MG Garfinkel, AF Gay, C Gerberich, H Gerchtein, E Gerdes, D Giagu, S Giannetti, P Gibson, A Gibson, K Ginsburg, C Giolo, K Giordani, M Giunta, M Giurgiu, G Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Gomez-Ceballos, G Goncharov, M Gonzalez, O Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Griffiths, M Grinstein, S Grosso-Pilcher, C Grundler, U Guimaraes da Costa, J Haber, C Hahn, SR Hahn, K Halkiadakis, E Hamilton, A Han, BY Handler, R Happacher, F Hara, K Hare, M Harper, S Harr, RF Harris, RM Hatakeyama, K Hauser, J Hays, C Hayward, H Heijboer, A Heinemann, B Heinrich, J Hennecke, M Herndon, M Heuser, J Hidas, D Hill, CS Hirschbuehl, D Hocker, A Holloway, A Hou, S Houlden, M Hsu, SC Huffman, BT Hughes, RE Huston, J Ikado, K Incandela, J Introzzi, G Iori, M Ishizawa, Y Ivanov, A Iyutin, B James, E Jang, D Jayatilaka, B Jeans, D Jensen, H Jeon, EJ Jones, M Joo, KK Jun, SY Junk, TR Kamon, T Kang, J Karagoz-Unel, M Karchin, PE Kato, Y Kemp, Y Kephart, R Kerzel, U Khotilovich, V Kilminster, B Kim, DH Kim, HS Kim, JE Kim, MJ Kim, MS Kim, SB Kim, SH Kim, YK Kirby, M Kirsch, L Klimenko, S Klute, M Knuteson, B Ko, BR Kobayashi, H Kondo, K Kong, DJ Konigsberg, J Kordas, K Korytov, A Kotwal, AV Kovalev, A Kraus, J Kravchenko, I Kreps, M Kreymer, A Kroll, J Krumnack, N Kruse, M Krutelyov, V Kuhlmann, SE Kusakabe, Y Kwang, S Laasanen, AT Lai, S Lami, S Lammel, S Lancaster, M Lander, RL Lannon, K Lath, A Latino, G Lazzizzera, I Lecci, C LeCompte, T Lee, J Lee, J Lee, SW Lefevre, R Leonardo, N Leone, S Levy, S Lewis, JD Li, K Lin, C Lin, CS Lindgren, M Lipeles, E Liss, TM Lister, A Litvintsev, DO Liu, T Liu, Y Lockyer, NS Loginov, A Loreti, M Loverre, P Lu, RS Lucchesi, D Lujan, P Lukens, P Lungu, G Lyons, L Lys, J Lysak, R Lytken, E Mack, P MacQueen, D Madrak, R Maeshima, K Maksimovic, P Manca, G Margaroli, F Marginean, R Marino, C Martin, A Martin, M Martin, V Martinez, M Maruyama, T Matsunaga, H Mattson, ME Mazini, R Mazzanti, P McFarland, KS McGivern, D McIntyre, P McNamara, P McNulty, R Mehta, A Menzemer, S Menzione, A Merkel, P Mesropian, C Messina, A von der Mey, M Miao, T Miladinovic, N Miles, J Miller, R Miller, JS Mills, C Milnik, M Miquel, R Miscetti, S Mitselmakher, G Miyamoto, A Moggi, N Mohr, B Moore, R Morello, M Fernandez, MP Mulmenstadt, J Mukherjee, A Mulhearn, M Muller, T Mumford, R Murat, P Nachtman, J Nahn, S Nakano, I Napier, A Naumov, D Necula, V Neu, C Neubauer, MS Nielsen, J Nigmanov, T Nodulman, L Norniella, O Ogawa, T Oh, SH Oh, YD Okusawa, T Oldeman, R Orava, R Osterberg, K Pagliarone, C Palencia, E Paoletti, R Papadimitriou, V Papikonomou, A Paramonov, AA Parks, B Pashapour, S Patrick, J Pauletta, G Paulini, M Paus, C Pellett, DE Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, K Plager, C Pondrom, L Pope, G Portell, X Poukhov, O Pounder, N Prakoshyn, F Pronko, A Proudfoot, J Ptohos, F Punzi, G Pursley, J Rademacker, J Rahaman, A Rakitin, A Rappoccio, S Ratnikov, F Reisert, B Rekovic, V van Remortel, N Renton, P Rescigno, M Richter, S Rimondi, F Rinnert, K Ristori, L Robertson, WJ Robson, A Rodrigo, T Rogers, E Rolli, S Roser, R Rossi, M Rossin, R Rott, C Ruiz, A Russ, J Rusu, V Ryan, D Saarikko, H Sabik, S Safonov, A Sakumoto, WK Salamanna, G Salto, O Saltzberg, D Sanchez, C Santi, L Sarkar, S Sato, K Savard, P Savoy-Navarro, A Scheidle, T Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Schwarz, T Scodellaro, L Scott, AL Scribano, A Scuri, F Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Sexton-Kennedy, L Sfiligoi, I Shapiro, MD Shears, T Shepard, PF Sherman, D Shimojima, M Shochet, M Shon, Y Shreyber, I Sidoti, A Sinervo, P Sisakyan, A Sjolin, J Skiba, A Slaughter, AJ Sliwa, K Smirnov, D Smith, JR Snider, FD Snihur, R Soderberg, M Soha, A Somalwar, S Sorin, V Spalding, J Spinella, F Squillacioti, P Stanitzki, M Staveris-Polykalas, A St Denis, R Stelzer, B Stelzer-Chilton, O Stentz, D Strologas, J Stuart, D Suh, JS Sukhanov, A Sumorok, K Sun, H Suzuki, T Taffard, A Tafirout, R Takashima, R Takeuchi, Y Takikawa, K Tanaka, M Tanaka, R Tecchio, M Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tiwari, V Tkaczyk, S Toback, D Tollefson, K Tomura, T Tonelli, D Tonnesmann, M Torre, S Torretta, D Tourneur, S Trischuk, W Tsuchiya, R Tsuno, S Turini, N Ukegawa, F Unverhau, T Uozumi, S Usynin, D Vacavant, L Vaiciulis, A Vallecorsa, S Varganov, A Vataga, E Velev, G Veramendi, G Veszpremi, V Vickey, T Vidal, R Vila, I Vilar, R Vollrath, I Volobouev, I Wurthwein, F Wagner, P Wagner, RG Wagner, RL Wagner, W Wallny, R Walter, T Wan, Z Wang, MJ Wang, SM Warburton, A Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Whiteson, D Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wittich, P Wolbers, S Wolfe, C Worm, S Wright, T Wu, X Wynne, SM Yagil, A Yamamoto, K Yamaoka, J Yamashita, Y Yang, C Yang, UK Yao, WM Yeh, GP Yoh, J Yorita, K Yoshida, T Yu, I Yu, SS Yun, JC Zanello, L Zanetti, A Zaw, I Zetti, F Zhang, X Zhou, J Zucchelli, S AF Abulencia, A Acosta, D Adelman, J Affolder, T Akimoto, T Albrow, MG Ambrose, D Amerio, S Amidei, D Anastassov, A Anikeev, K Annovi, A Antos, J Aoki, M Apollinari, G Arguin, JF Arisawa, T Artikov, A Ashmanskas, W Attal, A Azfar, F Azzi-Bacchetta, P Azzurri, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Bartsch, V Bauer, G Bedeschi, F Behari, S Belforte, S Bellettini, G Bellinger, J Belloni, A Ben-Haim, E Benjamin, D Beretvas, A Beringer, J Berry, T Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Boisvert, V Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bourov, S Boveia, A Brau, B Bromberg, C Brubaker, E Budagov, J Budd, HS Budd, S Burkett, K Busetto, G Bussey, P Byrum, KL Cabrera, S Campanelli, M Campbell, M Canelli, F Canepa, A Carlsmith, D Carosi, R Carron, S Casarsa, M Castro, A Catastini, P Cauz, D Cavalli-Sforza, M Cerri, A Cerrito, L Chang, SH Chapman, J Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Cho, I Cho, K Chokheli, D Chou, JP Chu, PH Chuang, SH Chung, K Chung, WH Chung, YS Ciljak, M Ciobanu, CI Ciocci, MA Clark, A Clark, D Coca, M Connolly, A Convery, ME Conway, J Cooper, B Copic, K Cordelli, M Cortiana, G Cruz, A Cuevas, J Culbertson, R Cyr, D DaRonco, S D'Auria, S D'onofrio, M Dagenhart, D de Barbaro, P De Cecco, S Deisher, A De Lentdecker, G Dell'Orso, M Demers, S Demortier, L Deng, J Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, J DiTuro, P Dorr, C Dominguez, A Donati, S Donega, M Dong, P Donini, J Dorigo, T Dube, S Ebina, K Efron, J Ehlers, J Erbacher, R Errede, D Errede, S Eusebi, R Fang, HC Farrington, S Fedorko, I Fedorko, WT Feild, RG Feindt, M Fernandez, JP Field, R Flanagan, G Flores-Castillo, LR Foland, A Forrester, S Foster, GW Franklin, M Freeman, JC Fujii, Y Furic, I Gajjar, A Gallinaro, M Galyardt, J Garcia, JE Sciverez, MG Garfinkel, AF Gay, C Gerberich, H Gerchtein, E Gerdes, D Giagu, S Giannetti, P Gibson, A Gibson, K Ginsburg, C Giolo, K Giordani, M Giunta, M Giurgiu, G Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Gomez-Ceballos, G Goncharov, M Gonzalez, O Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Griffiths, M Grinstein, S Grosso-Pilcher, C Grundler, U Guimaraes da Costa, J Haber, C Hahn, SR Hahn, K Halkiadakis, E Hamilton, A Han, BY Handler, R Happacher, F Hara, K Hare, M Harper, S Harr, RF Harris, RM Hatakeyama, K Hauser, J Hays, C Hayward, H Heijboer, A Heinemann, B Heinrich, J Hennecke, M Herndon, M Heuser, J Hidas, D Hill, CS Hirschbuehl, D Hocker, A Holloway, A Hou, S Houlden, M Hsu, SC Huffman, BT Hughes, RE Huston, J Ikado, K Incandela, J Introzzi, G Iori, M Ishizawa, Y Ivanov, A Iyutin, B James, E Jang, D Jayatilaka, B Jeans, D Jensen, H Jeon, EJ Jones, M Joo, KK Jun, SY Junk, TR Kamon, T Kang, J Karagoz-Unel, M Karchin, PE Kato, Y Kemp, Y Kephart, R Kerzel, U Khotilovich, V Kilminster, B Kim, DH Kim, HS Kim, JE Kim, MJ Kim, MS Kim, SB Kim, SH Kim, YK Kirby, M Kirsch, L Klimenko, S Klute, M Knuteson, B Ko, BR Kobayashi, H Kondo, K Kong, DJ Konigsberg, J Kordas, K Korytov, A Kotwal, AV Kovalev, A Kraus, J Kravchenko, I Kreps, M Kreymer, A Kroll, J Krumnack, N Kruse, M Krutelyov, V Kuhlmann, SE Kusakabe, Y Kwang, S Laasanen, AT Lai, S Lami, S Lammel, S Lancaster, M Lander, RL Lannon, K Lath, A Latino, G Lazzizzera, I Lecci, C LeCompte, T Lee, J Lee, J Lee, SW Lefevre, R Leonardo, N Leone, S Levy, S Lewis, JD Li, K Lin, C Lin, CS Lindgren, M Lipeles, E Liss, TM Lister, A Litvintsev, DO Liu, T Liu, Y Lockyer, NS Loginov, A Loreti, M Loverre, P Lu, RS Lucchesi, D Lujan, P Lukens, P Lungu, G Lyons, L Lys, J Lysak, R Lytken, E Mack, P MacQueen, D Madrak, R Maeshima, K Maksimovic, P Manca, G Margaroli, F Marginean, R Marino, C Martin, A Martin, M Martin, V Martinez, M Maruyama, T Matsunaga, H Mattson, ME Mazini, R Mazzanti, P McFarland, KS McGivern, D McIntyre, P McNamara, P McNulty, R Mehta, A Menzemer, S Menzione, A Merkel, P Mesropian, C Messina, A von der Mey, M Miao, T Miladinovic, N Miles, J Miller, R Miller, JS Mills, C Milnik, M Miquel, R Miscetti, S Mitselmakher, G Miyamoto, A Moggi, N Mohr, B Moore, R Morello, M Fernandez, MP Mulmenstadt, J Mukherjee, A Mulhearn, M Muller, T Mumford, R Murat, P Nachtman, J Nahn, S Nakano, I Napier, A Naumov, D Necula, V Neu, C Neubauer, MS Nielsen, J Nigmanov, T Nodulman, L Norniella, O Ogawa, T Oh, SH Oh, YD Okusawa, T Oldeman, R Orava, R Osterberg, K Pagliarone, C Palencia, E Paoletti, R Papadimitriou, V Papikonomou, A Paramonov, AA Parks, B Pashapour, S Patrick, J Pauletta, G Paulini, M Paus, C Pellett, DE Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, K Plager, C Pondrom, L Pope, G Portell, X Poukhov, O Pounder, N Prakoshyn, F Pronko, A Proudfoot, J Ptohos, F Punzi, G Pursley, J Rademacker, J Rahaman, A Rakitin, A Rappoccio, S Ratnikov, F Reisert, B Rekovic, V van Remortel, N Renton, P Rescigno, M Richter, S Rimondi, F Rinnert, K Ristori, L Robertson, WJ Robson, A Rodrigo, T Rogers, E Rolli, S Roser, R Rossi, M Rossin, R Rott, C Ruiz, A Russ, J Rusu, V Ryan, D Saarikko, H Sabik, S Safonov, A Sakumoto, WK Salamanna, G Salto, O Saltzberg, D Sanchez, C Santi, L Sarkar, S Sato, K Savard, P Savoy-Navarro, A Scheidle, T Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Schwarz, T Scodellaro, L Scott, AL Scribano, A Scuri, F Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Sexton-Kennedy, L Sfiligoi, I Shapiro, MD Shears, T Shepard, PF Sherman, D Shimojima, M Shochet, M Shon, Y Shreyber, I Sidoti, A Sinervo, P Sisakyan, A Sjolin, J Skiba, A Slaughter, AJ Sliwa, K Smirnov, D Smith, JR Snider, FD Snihur, R Soderberg, M Soha, A Somalwar, S Sorin, V Spalding, J Spinella, F Squillacioti, P Stanitzki, M Staveris-Polykalas, A St Denis, R Stelzer, B Stelzer-Chilton, O Stentz, D Strologas, J Stuart, D Suh, JS Sukhanov, A Sumorok, K Sun, H Suzuki, T Taffard, A Tafirout, R Takashima, R Takeuchi, Y Takikawa, K Tanaka, M Tanaka, R Tecchio, M Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tiwari, V Tkaczyk, S Toback, D Tollefson, K Tomura, T Tonelli, D Tonnesmann, M Torre, S Torretta, D Tourneur, S Trischuk, W Tsuchiya, R Tsuno, S Turini, N Ukegawa, F Unverhau, T Uozumi, S Usynin, D Vacavant, L Vaiciulis, A Vallecorsa, S Varganov, A Vataga, E Velev, G Veramendi, G Veszpremi, V Vickey, T Vidal, R Vila, I Vilar, R Vollrath, I Volobouev, I Wurthwein, F Wagner, P Wagner, RG Wagner, RL Wagner, W Wallny, R Walter, T Wan, Z Wang, MJ Wang, SM Warburton, A Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Whiteson, D Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wittich, P Wolbers, S Wolfe, C Worm, S Wright, T Wu, X Wynne, SM Yagil, A Yamamoto, K Yamaoka, J Yamashita, Y Yang, C Yang, UK Yao, WM Yeh, GP Yoh, J Yorita, K Yoshida, T Yu, I Yu, SS Yun, JC Zanello, L Zanetti, A Zaw, I Zetti, F Zhang, X Zhou, J Zucchelli, S TI Measurement of mass and width of the excited charmed meson states D-1(0) and D-2(*0) at CDF SO PHYSICAL REVIEW D LA English DT Article ID HEAVY MESONS; QUARK-MODEL; DECAY; TRACKER AB We report on precision measurements of the masses and widths of the narrow, orbitally excited states D-1(0) and D-2(*0) using the CDF II detector at the Fermilab Tevatron. Both states (collectively called D-**) are reconstructed in the decay channel D-**-> D*+pi(-). The D-2(*0) is also reconstructed in the D-**-> D+pi(-) channel. Using a data set with an integrated luminosity of 210 pb(-1), the measured masses and widths for the D-1(0) are 2421.7 +/- 0.7 +/- 0.6 MeV/c(2) and 20.0 +/- 1.7 +/- 1.3 MeV/c(2) respectively, while for the D-2(*0) they are 2463.3 +/- 0.6 +/- 0.8 MeV/c(2) and 49.2 +/- 2.3 +/- 1.2 MeV/c(2). These values are currently the single best measurements available. C1 Univ Illinois, Urbana, IL 61801 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain. Baylor Univ, Waco, TX 76798 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Brandeis Univ, Waltham, MA 02254 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. 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Seoul Natl Univ, Seoul 151742, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Liverpool, Liverpool L69 7ZE, Merseyside, England. UCL, London WC1E 6BT, England. MIT, Cambridge, MA 02139 USA. McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada. Univ Toronto, Toronto, ON M5S 1A7, Canada. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Inst Theoret & Expt Phys, Moscow 117259, Russia. Univ New Mexico, Albuquerque, NM 87131 USA. Northwestern Univ, Evanston, IL 60208 USA. Ohio State Univ, Columbus, OH 43210 USA. Okayama Univ, Okayama 7008530, Japan. Osaka City Univ, Osaka 588, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy. Univ Penn, Philadelphia, PA 19104 USA. Scuola Normale Super Pisa, I-56127 Pisa, Italy. Univ Pisa, Ist Nazl Fis Nucl, Siena, Italy. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Purdue Univ, W Lafayette, IN 47907 USA. Univ Rochester, Rochester, NY 14627 USA. Rockefeller Univ, New York, NY 10021 USA. Univ Roma La Sapienza, Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas A&M Univ, College Stn, TX 77843 USA. Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Tufts Univ, Medford, MA 02155 USA. Waseda Univ, Tokyo 169, Japan. Wayne State Univ, Detroit, MI 48201 USA. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06520 USA. RP Univ Illinois, Urbana, IL 61801 USA. RI Warburton, Andreas/N-8028-2013; Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; St.Denis, Richard/C-8997-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012; Amerio, Silvia/J-4605-2012; Punzi, Giovanni/J-4947-2012; messina, andrea/C-2753-2013; Annovi, Alberto/G-6028-2012; Ivanov, Andrew/A-7982-2013; Connolly, Amy/J-3958-2013; Kim, Soo-Bong/B-7061-2014; Lysak, Roman/H-2995-2014; Scodellaro, Luca/K-9091-2014; Paulini, Manfred/N-7794-2014; Russ, James/P-3092-2014; Lazzizzera, Ignazio/E-9678-2015; Cabrera Urban, Susana/H-1376-2015; Garcia, Jose /H-6339-2015; ciocci, maria agnese /I-2153-2015; Cavalli-Sforza, Matteo/H-7102-2015; Muelmenstaedt, Johannes/K-2432-2015; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Prokoshin, Fedor/E-2795-2012; Leonardo, Nuno/M-6940-2016; Canelli, Florencia/O-9693-2016; Chiarelli, Giorgio/E-8953-2012; OI Warburton, Andreas/0000-0002-2298-7315; Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Annovi, Alberto/0000-0002-4649-4398; Ivanov, Andrew/0000-0002-9270-5643; Scodellaro, Luca/0000-0002-4974-8330; Paulini, Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155; Lazzizzera, Ignazio/0000-0001-5092-7531; ciocci, maria agnese /0000-0003-0002-5462; Muelmenstaedt, Johannes/0000-0003-1105-6678; Introzzi, Gianluca/0000-0002-1314-2580; Lancaster, Mark/0000-0002-8872-7292; Gallinaro, Michele/0000-0003-1261-2277; Salamanna, Giuseppe/0000-0002-0861-0052; Turini, Nicola/0000-0002-9395-5230; Osterberg, Kenneth/0000-0003-4807-0414; Gorelov, Igor/0000-0001-5570-0133; Prokoshin, Fedor/0000-0001-6389-5399; Leonardo, Nuno/0000-0002-9746-4594; Canelli, Florencia/0000-0001-6361-2117; Chiarelli, Giorgio/0000-0001-9851-4816; Giordani, Mario/0000-0002-0792-6039; Casarsa, Massimo/0000-0002-1353-8964; Latino, Giuseppe/0000-0002-4098-3502; iori, maurizio/0000-0002-6349-0380 NR 26 TC 11 Z9 11 U1 1 U2 6 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 MAR PY 2006 VL 73 IS 5 AR 051104 DI 10.1103/PhysRevD.73.051104 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800004 ER PT J AU Abulencia, A Acosta, D Adelman, J Affolder, T Akimoto, T Albrow, MG Ambrose, D Amerio, S Amidei, D Anastassov, A Anikeev, K Annovi, A Antos, J Aoki, M Apollinari, G Arguin, JF Arisawa, T Artikov, A Ashmanskas, W Attal, A Azfar, F Azzi-Bacchetta, P Azzurri, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Bartsch, V Bauer, G Bedeschi, F Behari, S Belforte, S Bellettini, G Bellinger, J Belloni, A Ben Haim, E Benjamin, D Beretvas, A Beringer, J Berry, T Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Boisvert, V Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bourov, S Boveia, A Brau, B Bromberg, C Brubaker, E Budagov, J Budd, HS Budd, S Burkett, K Busetto, G Bussey, P Byrum, KL Cabrera, S Campanelli, M Campbell, M Canelli, F Canepa, A Carlsmith, D Carosi, R Carron, S Casarsa, M Castro, A Catastini, P Cauz, D Cavalli-Sforza, M Cerri, A Cerrito, L Chang, SH Chapman, J Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Cho, I Cho, K Chokheli, D Chou, JP Chu, PH Chuang, SH Chung, K Chung, WH Chung, YS Ciljak, M Ciobanu, CI Ciocci, MA Clark, A Clark, D Coca, M Connolly, A Convery, ME Conway, J Cooper, B Copic, K Cordelli, M Cortiana, G Cruz, A Cuevas, J Culbertson, R Cyr, D DaRonco, S D'Auria, S D'onofrio, M Dagenhart, D de Barbaro, P De Cecco, S Deisher, A De Lentdecker, G Dell'Orso, M Demers, S Demortier, L Deng, J Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, JR DiTuro, P Dorr, C Dominguez, A Donati, S Donega, M Dong, P Donini, J Dorigo, T Dube, S Ebina, K Efron, J Ehlers, J Erbacher, R Errede, D Errede, S Eusebi, R Fang, HC Farrington, S Fedorko, I Fedorko, WT Feild, RG Feindt, M Fernandez, JP Field, R Flanagan, G Flores-Castillo, LR Foland, A Forrester, S Foster, GW Franklin, M Freeman, JC Fujii, Y Furic, I Gajjar, A Gallinaro, M Galyardt, J Garcia, JE Sciveres, MG Garfinkel, AF Gay, C Gerberich, H Gerchtein, E Gerdes, D Giagu, S di Giovanni, GP Giannetti, P Gibson, A Gibson, K Ginsburg, C Giokaris, N Giolo, K Giordani, M Giunta, M Giurgiu, G Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Gomez-Ceballos, G Goncharov, M Gonzalez, O Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Griffiths, M Grinstein, S Grosso-Pilcher, C Grundler, U da Costa, JG Haber, C Hahn, SR Hahn, K Halkiadakis, E Hamilton, A Han, BY Handler, R Happacher, F Hara, K Hare, M Harper, S Harr, RF Harris, RM Hatakeyama, K Hauser, J Hays, C Hayward, H Heijboer, A Heinemann, B Heinrich, J Hennecke, M Herndon, M Heuser, J Hidas, D Hill, CS Hirschbuehl, D Hocker, A Holloway, A Hou, S Houlden, M Hsu, SC Huffman, BT Hughes, RE Huston, J Ikado, K Incandela, J Introzzi, G Iori, M Ishizawa, Y Ivanov, A Iyutin, B James, E Jang, D Jayatilaka, B Jeans, D Jensen, H Jeon, EJ Jones, M Joo, KK Jun, SY Junk, TR Kamon, T Kang, J Karagoz-Unel, M Karchin, PE Kato, Y Kemp, Y Kephart, R Kerzel, U Khotilovich, V Kilminster, B Kim, DH Kim, HS Kim, JE Kim, MJ Kim, MS Kim, SB Kim, SH Kim, YK Kirby, M Kirsch, L Klimenko, S Klute, M Knuteson, B Ko, BR Kobayashi, H Kondo, K Kong, DJ Konigsberg, J Kordas, K Korytov, A Kotwal, AV Kovalev, A Kraus, J Kravchenko, I Kreps, M Kreymer, A Kroll, J Krumnack, N Kruse, M Krutelyov, V Kuhlmann, SE Kusakabe, Y Kwang, S Laasanen, AT Lai, S Lami, S Lammel, S Lancaster, M Lander, RL Lannon, K Lath, A Latino, G Lazzizzera, I Lecci, C LeCompte, T Lee, J Lee, J Lee, SW Lefevre, R Leonardo, N Leone, S Levy, S Lewis, JD Li, K Lin, C Lin, CS Lindgren, M Lipeles, E Liss, TM Lister, A Litvintsev, DO Liu, T Liu, Y Lockyer, NS Loginov, A Loreti, M Loverre, P Lu, RS Lucchesi, D Lujan, P Lukens, P Lungu, G Lyons, L Lys, J Lysak, R Lytken, E Mack, P MacQueen, D Madrak, R Maeshima, K Maksimovic, P Manca, G Margaroli, F Marginean, R Marino, C Martin, A Martin, M Martin, V Martinez, M Maruyama, T Matsunaga, H Mattson, ME Mazini, R Mazzanti, P McFarland, KS McGivern, D McIntyre, P McNamara, P McNulty, R Mehta, A Menzemer, S Menzione, A Merkel, P Mesropian, C Messina, A von der Mey, M Miao, T Miladinovic, N Miles, J Miller, R Miller, JS Mills, C Milnik, M Miquel, R Miscetti, S Mitselmakher, G Miyamoto, A Moggi, N Mohr, B Moore, R Morello, M Fernandez, PM Mulmenstadt, J Mukherjee, A Mulhearn, M Muller, T Mumford, R Murat, P Nachtman, J Nahn, S Nakano, I Napier, A Naumov, D Necula, V Neu, C Neubauer, MS Nielsen, J Nigmanov, T Nodulman, L Norniella, O Ogawa, T Oh, SH Oh, YD Okusawa, T Oldeman, R Orava, R Osterberg, K Pagliarone, C Palencia, E Paoletti, R Papadimitriou, V Papikonomou, A Paramonov, AA Parks, B Pashapour, S Patrick, J Pauletta, G Paulini, M Paus, C Pellett, DE Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, K Plager, C Pondrom, L Pope, G Portell, X Poukhov, O Pounder, N Prakoshyn, F Pronko, A Proudfoot, J Ptohos, F Punzi, G Pursley, J Rademacker, J Rahaman, A Rakitin, A Rappoccio, S Ratnikov, F Reisert, B Rekovic, V van Remortel, N Renton, P Rescigno, M Richter, S Rimondi, F Rinnert, K Ristori, L Robertson, WJ Robson, A Rodrigo, T Rogers, E Rolli, S Roser, R Rossi, M Rossin, R Rott, C Ruiz, A Russ, J Rusu, V Ryan, D Saarikko, H Sabik, S Safonov, A Sakumoto, WK Salamanna, G Salto, O Saltzberg, D Sanchez, C Santi, L Sarkar, S Sato, K Savard, P Savoy-Navarro, A Scheidle, T Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Schwarz, T Scodellaro, L Scott, AL Scribano, A Scuri, F Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Sexton-Kennedy, L Sfiligoi, I Shapiro, MD Shears, T Shepard, PF Sherman, D Shimojima, M Shochet, M Shon, Y Shreyber, I Sidoti, A Sill, A Sinervo, P Sisakyan, A Sjolin, J Skiba, A Slaughter, AJ Sliwa, K Smirnov, D Smith, JR Snider, FD Snihur, R Soderberg, M Soha, A Somalwar, S Sorin, V Spalding, J Spinella, F Squillacioti, P Stanitzki, M Staveris-Polykalas, A St Denis, R Stelzer, B Stelzer-Chilton, O Stentz, D Strologas, J Stuart, D Suh, JS Sukhanov, A Sumorok, K Sun, H Suzuki, T Taffard, A Tafirout, R Takashima, R Takeuchi, Y Takikawa, K Tanaka, M Tanaka, R Tecchio, M Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tiwari, V Tkaczyk, S Toback, D Tokar, S Tollefson, K Tomura, T Tonelli, D Tonnesmann, M Torre, S Torretta, D Tourneur, S Trischuk, W Tsuchiya, R Tsuno, S Turini, N Ukegawa, F Unverhau, T Uozumi, S Usynin, D Vacavant, L Vaiciulis, A Vallecorsa, S Varganov, A Vataga, E Velev, G Veramendi, G Veszpremi, V Vickey, T Vidal, R Vila, I Vilar, R Vollrath, I Volobouev, I Wurthwein, F Wagner, P Wagner, RG Wagner, RL Wagner, W Wallny, R Walter, T Wan, Z Wang, MJ Wang, SM Warburton, A Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Whiteson, D Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wittich, P Wolbers, S Wolfe, C Worm, S Wright, T Wu, X Wynne, SM Yagil, A Yamamoto, K Yamaoka, J Yamashita, Y Yang, C Yang, UK Yao, WM Yeh, GP Yoh, J Yorita, K Yoshida, T Yu, I Yu, SS Yun, JC Zanello, L Zanetti, A Zaw, I Zetti, F Zhang, X Zhou, J Zucchelli, S AF Abulencia, A Acosta, D Adelman, J Affolder, T Akimoto, T Albrow, MG Ambrose, D Amerio, S Amidei, D Anastassov, A Anikeev, K Annovi, A Antos, J Aoki, M Apollinari, G Arguin, JF Arisawa, T Artikov, A Ashmanskas, W Attal, A Azfar, F Azzi-Bacchetta, P Azzurri, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Bartsch, V Bauer, G Bedeschi, F Behari, S Belforte, S Bellettini, G Bellinger, J Belloni, A Ben Haim, E Benjamin, D Beretvas, A Beringer, J Berry, T Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Boisvert, V Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bourov, S Boveia, A Brau, B Bromberg, C Brubaker, E Budagov, J Budd, HS Budd, S Burkett, K Busetto, G Bussey, P Byrum, KL Cabrera, S Campanelli, M Campbell, M Canelli, F Canepa, A Carlsmith, D Carosi, R Carron, S Casarsa, M Castro, A Catastini, P Cauz, D Cavalli-Sforza, M Cerri, A Cerrito, L Chang, SH Chapman, J Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Cho, I Cho, K Chokheli, D Chou, JP Chu, PH Chuang, SH Chung, K Chung, WH Chung, YS Ciljak, M Ciobanu, CI Ciocci, MA Clark, A Clark, D Coca, M Connolly, A Convery, ME Conway, J Cooper, B Copic, K Cordelli, M Cortiana, G Cruz, A Cuevas, J Culbertson, R Cyr, D DaRonco, S D'Auria, S D'onofrio, M Dagenhart, D de Barbaro, P De Cecco, S Deisher, A De Lentdecker, G Dell'Orso, M Demers, S Demortier, L Deng, J Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, JR DiTuro, P Dorr, C Dominguez, A Donati, S Donega, M Dong, P Donini, J Dorigo, T Dube, S Ebina, K Efron, J Ehlers, J Erbacher, R Errede, D Errede, S Eusebi, R Fang, HC Farrington, S Fedorko, I Fedorko, WT Feild, RG Feindt, M Fernandez, JP Field, R Flanagan, G Flores-Castillo, LR Foland, A Forrester, S Foster, GW Franklin, M Freeman, JC Fujii, Y Furic, I Gajjar, A Gallinaro, M Galyardt, J Garcia, JE Sciveres, MG Garfinkel, AF Gay, C Gerberich, H Gerchtein, E Gerdes, D Giagu, S di Giovanni, GP Giannetti, P Gibson, A Gibson, K Ginsburg, C Giokaris, N Giolo, K Giordani, M Giunta, M Giurgiu, G Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Gomez-Ceballos, G Goncharov, M Gonzalez, O Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Griffiths, M Grinstein, S Grosso-Pilcher, C Grundler, U da Costa, JG Haber, C Hahn, SR Hahn, K Halkiadakis, E Hamilton, A Han, BY Handler, R Happacher, F Hara, K Hare, M Harper, S Harr, RF Harris, RM Hatakeyama, K Hauser, J Hays, C Hayward, H Heijboer, A Heinemann, B Heinrich, J Hennecke, M Herndon, M Heuser, J Hidas, D Hill, CS Hirschbuehl, D Hocker, A Holloway, A Hou, S Houlden, M Hsu, SC Huffman, BT Hughes, RE Huston, J Ikado, K Incandela, J Introzzi, G Iori, M Ishizawa, Y Ivanov, A Iyutin, B James, E Jang, D Jayatilaka, B Jeans, D Jensen, H Jeon, EJ Jones, M Joo, KK Jun, SY Junk, TR Kamon, T Kang, J Karagoz-Unel, M Karchin, PE Kato, Y Kemp, Y Kephart, R Kerzel, U Khotilovich, V Kilminster, B Kim, DH Kim, HS Kim, JE Kim, MJ Kim, MS Kim, SB Kim, SH Kim, YK Kirby, M Kirsch, L Klimenko, S Klute, M Knuteson, B Ko, BR Kobayashi, H Kondo, K Kong, DJ Konigsberg, J Kordas, K Korytov, A Kotwal, AV Kovalev, A Kraus, J Kravchenko, I Kreps, M Kreymer, A Kroll, J Krumnack, N Kruse, M Krutelyov, V Kuhlmann, SE Kusakabe, Y Kwang, S Laasanen, AT Lai, S Lami, S Lammel, S Lancaster, M Lander, RL Lannon, K Lath, A Latino, G Lazzizzera, I Lecci, C LeCompte, T Lee, J Lee, J Lee, SW Lefevre, R Leonardo, N Leone, S Levy, S Lewis, JD Li, K Lin, C Lin, CS Lindgren, M Lipeles, E Liss, TM Lister, A Litvintsev, DO Liu, T Liu, Y Lockyer, NS Loginov, A Loreti, M Loverre, P Lu, RS Lucchesi, D Lujan, P Lukens, P Lungu, G Lyons, L Lys, J Lysak, R Lytken, E Mack, P MacQueen, D Madrak, R Maeshima, K Maksimovic, P Manca, G Margaroli, F Marginean, R Marino, C Martin, A Martin, M Martin, V Martinez, M Maruyama, T Matsunaga, H Mattson, ME Mazini, R Mazzanti, P McFarland, KS McGivern, D McIntyre, P McNamara, P McNulty, R Mehta, A Menzemer, S Menzione, A Merkel, P Mesropian, C Messina, A von der Mey, M Miao, T Miladinovic, N Miles, J Miller, R Miller, JS Mills, C Milnik, M Miquel, R Miscetti, S Mitselmakher, G Miyamoto, A Moggi, N Mohr, B Moore, R Morello, M Fernandez, PM Mulmenstadt, J Mukherjee, A Mulhearn, M Muller, T Mumford, R Murat, P Nachtman, J Nahn, S Nakano, I Napier, A Naumov, D Necula, V Neu, C Neubauer, MS Nielsen, J Nigmanov, T Nodulman, L Norniella, O Ogawa, T Oh, SH Oh, YD Okusawa, T Oldeman, R Orava, R Osterberg, K Pagliarone, C Palencia, E Paoletti, R Papadimitriou, V Papikonomou, A Paramonov, AA Parks, B Pashapour, S Patrick, J Pauletta, G Paulini, M Paus, C Pellett, DE Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, K Plager, C Pondrom, L Pope, G Portell, X Poukhov, O Pounder, N Prakoshyn, F Pronko, A Proudfoot, J Ptohos, F Punzi, G Pursley, J Rademacker, J Rahaman, A Rakitin, A Rappoccio, S Ratnikov, F Reisert, B Rekovic, V van Remortel, N Renton, P Rescigno, M Richter, S Rimondi, F Rinnert, K Ristori, L Robertson, WJ Robson, A Rodrigo, T Rogers, E Rolli, S Roser, R Rossi, M Rossin, R Rott, C Ruiz, A Russ, J Rusu, V Ryan, D Saarikko, H Sabik, S Safonov, A Sakumoto, WK Salamanna, G Salto, O Saltzberg, D Sanchez, C Santi, L Sarkar, S Sato, K Savard, P Savoy-Navarro, A Scheidle, T Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Schwarz, T Scodellaro, L Scott, AL Scribano, A Scuri, F Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Sexton-Kennedy, L Sfiligoi, I Shapiro, MD Shears, T Shepard, PF Sherman, D Shimojima, M Shochet, M Shon, Y Shreyber, I Sidoti, A Sill, A Sinervo, P Sisakyan, A Sjolin, J Skiba, A Slaughter, AJ Sliwa, K Smirnov, D Smith, JR Snider, FD Snihur, R Soderberg, M Soha, A Somalwar, S Sorin, V Spalding, J Spinella, F Squillacioti, P Stanitzki, M Staveris-Polykalas, A St Denis, R Stelzer, B Stelzer-Chilton, O Stentz, D Strologas, J Stuart, D Suh, JS Sukhanov, A Sumorok, K Sun, H Suzuki, T Taffard, A Tafirout, R Takashima, R Takeuchi, Y Takikawa, K Tanaka, M Tanaka, R Tecchio, M Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tiwari, V Tkaczyk, S Toback, D Tokar, S Tollefson, K Tomura, T Tonelli, D Tonnesmann, M Torre, S Torretta, D Tourneur, S Trischuk, W Tsuchiya, R Tsuno, S Turini, N Ukegawa, F Unverhau, T Uozumi, S Usynin, D Vacavant, L Vaiciulis, A Vallecorsa, S Varganov, A Vataga, E Velev, G Veramendi, G Veszpremi, V Vickey, T Vidal, R Vila, I Vilar, R Vollrath, I Volobouev, I Wurthwein, F Wagner, P Wagner, RG Wagner, RL Wagner, W Wallny, R Walter, T Wan, Z Wang, MJ Wang, SM Warburton, A Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Whiteson, D Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wittich, P Wolbers, S Wolfe, C Worm, S Wright, T Wu, X Wynne, SM Yagil, A Yamamoto, K Yamaoka, J Yamashita, Y Yang, C Yang, UK Yao, WM Yeh, GP Yoh, J Yorita, K Yoshida, T Yu, I Yu, SS Yun, JC Zanello, L Zanetti, A Zaw, I Zetti, F Zhang, X Zhou, J Zucchelli, S CA CDF Collaboration TI Search for second-generation scalar leptoquarks in p(p)over-bar collisions at root s=1.96 TeV SO PHYSICAL REVIEW D LA English DT Article ID FERMION-PAIR PRODUCTION; ROOT-S; HERA; TEVATRON; PHYSICS; LEP AB Results on a search for pair production of second-generation scalar leptoquark in p (p) over bar collisions at root s=1.96 TeV are reported. The data analyzed were collected by the CDF detector during the 2002-2003 Tevatron Run II and correspond to an integrated luminosity of 198 pb(-1). Leptoquarks (LQ) are sought through their decay into (charged) leptons and quarks, with final state signatures represented by two muons and jets and one muon, large transverse missing energy and jets. We observe no evidence for LQ production and derive 95% C.L. upper limits on the LQ production cross sections as well as lower limits on their mass as a function of beta, where beta is the branching fraction for LQ ->mu q. C1 Univ Illinois, Urbana, IL 61801 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain. Baylor Univ, Waco, TX 76798 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Brandeis Univ, Waltham, MA 02254 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Joint Nucl Res Inst, RU-141980 Dubna, Russia. Duke Univ, Durham, NC 27708 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Florida, Gainesville, FL 32611 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Geneva, CH-1211 Geneva 4, Switzerland. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Harvard Univ, Cambridge, MA 02138 USA. Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland. Helsinki Inst Phys, FIN-00014 Helsinki, Finland. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Liverpool, Liverpool L69 7ZE, Merseyside, England. UCL, London WC1E 6BT, England. MIT, Cambridge, MA 02139 USA. McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada. Univ Toronto, Toronto, ON M5S 1A7, Canada. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Inst Theoret & Expt Phys, Moscow 117259, Russia. Univ New Mexico, Albuquerque, NM 87131 USA. Northwestern Univ, Evanston, IL 60208 USA. Ohio State Univ, Columbus, OH 43210 USA. Okayama Univ, Okayama 7008530, Japan. Osaka City Univ, Osaka 588, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy. Univ Paris 06, LPNHE, IN2P3, CNRS, F-75252 Paris 05, France. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Ist Nazl Fis Nucl, Siena, Italy. Scuola Normale Super Pisa, I-56127 Pisa, Italy. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Purdue Univ, W Lafayette, IN 47907 USA. Univ Rochester, Rochester, NY 14627 USA. Rockefeller Univ, New York, NY 10021 USA. Univ Roma La Sapienza, Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas A&M Univ, College Stn, TX 77843 USA. Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Tufts Univ, Medford, MA 02155 USA. Waseda Univ, Tokyo 169, Japan. Wayne State Univ, Detroit, MI 48201 USA. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06520 USA. RP Univ Illinois, Urbana, IL 61801 USA. RI Connolly, Amy/J-3958-2013; Warburton, Andreas/N-8028-2013; Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; St.Denis, Richard/C-8997-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012; Amerio, Silvia/J-4605-2012; Punzi, Giovanni/J-4947-2012; messina, andrea/C-2753-2013; Annovi, Alberto/G-6028-2012; Ivanov, Andrew/A-7982-2013; Kim, Soo-Bong/B-7061-2014; Lysak, Roman/H-2995-2014; Scodellaro, Luca/K-9091-2014; Paulini, Manfred/N-7794-2014; Russ, James/P-3092-2014; Cabrera Urban, Susana/H-1376-2015; Garcia, Jose /H-6339-2015; ciocci, maria agnese /I-2153-2015; Cavalli-Sforza, Matteo/H-7102-2015; Prokoshin, Fedor/E-2795-2012; Muelmenstaedt, Johannes/K-2432-2015; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Leonardo, Nuno/M-6940-2016; Canelli, Florencia/O-9693-2016 OI Warburton, Andreas/0000-0002-2298-7315; Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Annovi, Alberto/0000-0002-4649-4398; Ivanov, Andrew/0000-0002-9270-5643; Scodellaro, Luca/0000-0002-4974-8330; Paulini, Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155; ciocci, maria agnese /0000-0003-0002-5462; Prokoshin, Fedor/0000-0001-6389-5399; Muelmenstaedt, Johannes/0000-0003-1105-6678; Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Leonardo, Nuno/0000-0002-9746-4594; Canelli, Florencia/0000-0001-6361-2117 NR 40 TC 25 Z9 25 U1 1 U2 5 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. 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D PD MAR PY 2006 VL 73 IS 5 AR 051102 DI 10.1103/PhysRevD.73.051102 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800002 ER PT J AU Abulencia, A Acosta, D Adelman, J Affolder, T Akimoto, T Albrow, MG Ambrose, D Amerio, S Amidei, D Anastassov, A Anikeev, K Annovi, A Antos, J Aoki, M Apollinari, G Arguin, JF Arisawa, T Artikov, A Ashmanskas, W Attal, A Azfar, F Azzi-Bacchetta, P Azzurri, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Bartsch, V Bauer, G Bedeschi, F Behari, S Belforte, S Bellettini, G Bellinger, J Belloni, A Ben Haim, E Benjamin, D Beretvas, A Beringer, J Berry, T Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Boisvert, V Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bourov, S Boveia, A Brau, B Bromberg, C Brubaker, E Budagov, J Budd, HS Budd, S Burkett, K Busetto, G Bussey, P Byrum, KL Cabrera, S Campanelli, M Campbell, M Canelli, F Canepa, A Carlsmith, D Carosi, R Carron, S Casarsa, M Castro, A Catastini, P Cauz, D Cavalli-Sforza, M Cerri, A Cerrito, L Chang, SH Chapman, J Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Cho, I Cho, K Chokheli, D Chou, JP Chu, PH Chuang, SH Chung, K Chung, WH Chung, YS Ciljak, M Ciobanu, CI Ciocci, MA Clark, A Clark, D Coca, M Connolly, A Convery, ME Conway, J Cooper, B Copic, K Cordelli, M Cortiana, G Cruz, A Cuevas, J Culbertson, R Cyr, D DaRonco, S D'Auria, S D'onofrio, M Dagenhart, D de Barbaro, P De Cecco, S Deisher, A De Lentdecker, G Dell'Orso, M Demers, S Demortier, L Deng, J Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, JR DiTuro, P Dorr, C Dominguez, A Donati, S Donega, M Dong, P Donini, J Dorigo, T Dube, S Ebina, K Efron, J Ehlers, J Erbacher, R Errede, D Errede, S Eusebi, R Fang, HC Farrington, S Fedorko, I Fedorko, WT Feild, RG Feindt, M Fernandez, JP Field, R Flanagan, G Flores-Castillo, LR Foland, A Forrester, S Foster, GW Franklin, M Freeman, JC Fujii, Y Furic, I Gajjar, A Gallinaro, M Galyardt, J Garcia, JE Sciveres, MG Garfinkel, AF Gay, C Gerberich, H Gerchtein, E Gerdes, D Giagu, S di Giovanni, GP Giannetti, P Gibson, A Gibson, K Ginsburg, C Giokaris, N Giolo, K Giordani, M Giunta, M Giurgiu, G Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Gomez-Ceballos, G Goncharov, M Gonzalez, O Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Griffiths, M Grinstein, S Grosso-Pilcher, C Grundler, U da Costa, JG Haber, C Hahn, SR Hahn, K Halkiadakis, E Hamilton, A Han, BY Handler, R Happacher, F Hara, K Hare, M Harper, S Harr, RF Harris, RM Hatakeyama, K Hauser, J Hays, C Hayward, H Heijboer, A Heinemann, B Heinrich, J Hennecke, M Herndon, M Heuser, J Hidas, D Hill, CS Hirschbuehl, D Hocker, A Holloway, A Hou, S Houlden, M Hsu, SC Huffman, BT Hughes, RE Huston, J Ikado, K Incandela, J Introzzi, G Iori, M Ishizawa, Y Ivanov, A Iyutin, B James, E Jang, D Jayatilaka, B Jeans, D Jensen, H Jeon, EJ Jones, M Joo, KK Jun, SY Junk, TR Kamon, T Kang, J Karagoz-Unel, M Karchin, PE Kato, Y Kemp, Y Kephart, R Kerzel, U Khotilovich, V Kilminster, B Kim, DH Kim, HS Kim, JE Kim, MJ Kim, MS Kim, SB Kim, SH Kim, YK Kirby, M Kirsch, L Klimenko, S Klute, M Knuteson, B Ko, BR Kobayashi, H Kondo, K Kong, DJ Konigsberg, J Kordas, K Korytov, A Kotwal, AV Kovalev, A Kraus, J Kravchenko, I Kreps, M Kreymer, A Kroll, J Krumnack, N Kruse, M Krutelyov, V Kuhlmann, SE Kusakabe, Y Kwang, S Laasanen, AT Lai, S Lami, S Lammel, S Lancaster, M Lander, RL Lannon, K Lath, A Latino, G Lazzizzera, I Lecci, C LeCompte, T Lee, J Lee, J Lee, SW Lefevre, R Leonardo, N Leone, S Levy, S Lewis, JD Li, K Lin, C Lin, CS Lindgren, M Lipeles, E Liss, TM Lister, A Litvintsev, DO Liu, T Liu, Y Lockyer, NS Loginov, A Loreti, M Loverre, P Lu, RS Lucchesi, D Lujan, P Lukens, P Lungu, G Lyons, L Lys, J Lysak, R Lytken, E Mack, P MacQueen, D Madrak, R Maeshima, K Maksimovic, P Manca, G Margaroli, F Marginean, R Marino, C Martin, A Martin, M Martin, V Martinez, M Maruyama, T Matsunaga, H Mattson, ME Mazini, R Mazzanti, P McFarland, KS McGivern, D McIntyre, P McNamara, P McNulty, R Mehta, A Menzemer, S Menzione, A Merkel, P Mesropian, C Messina, A von der Mey, M Miao, T Miladinovic, N Miles, J Miller, R Miller, JS Mills, C Milnik, M Miquel, R Miscetti, S Mitselmakher, G Miyamoto, A Moggi, N Mohr, B Moore, R Morello, M Fernandez, PM Mulmenstadt, J Mukherjee, A Mulhearn, M Muller, T Mumford, R Murat, P Nachtman, J Nahn, S Nakano, I Napier, A Naumov, D Necula, V Neu, C Neubauer, MS Nielsen, J Nigmanov, T Nodulman, L Norniella, O Ogawa, T Oh, SH Oh, YD Okusawa, T Oldeman, R Orava, R Osterberg, K Pagliarone, C Palencia, E Paoletti, R Papadimitriou, V Papikonomou, A Paramonov, AA Parks, B Pashapour, S Patrick, J Pauletta, G Paulini, M Paus, C Pellett, DE Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, K Plager, C Pondrom, L Pope, G Portell, X Poukhov, O Pounder, N Prakoshyn, F Pronko, A Proudfoot, J Ptohos, F Punzi, G Pursley, J Rademacker, J Rahaman, A Rakitin, A Rappoccio, S Ratnikov, F Reisert, B Rekovic, V van Remortel, N Renton, P Rescigno, M Richter, S Rimondi, F Rinnert, K Ristori, L Robertson, WJ Robson, A Rodrigo, T Rogers, E Rolli, S Roser, R Rossi, M Rossin, R Rott, C Ruiz, A Russ, J Rusu, V Ryan, D Saarikko, H Sabik, S Safonov, A Sakumoto, WK Salamanna, G Salto, O Saltzberg, D Sanchez, C Santi, L Sarkar, S Sato, K Savard, P Savoy-Navarro, A Scheidle, T Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Schwarz, T Scodellaro, L Scott, AL Scribano, A Scuri, F Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Sexton-Kennedy, L Sfiligoi, I Shapiro, MD Shears, T Shepard, PF Sherman, D Shimojima, M Shochet, M Shon, Y Shreyber, I Sidoti, A Sill, A Sinervo, P Sisakyan, A Sjolin, J Skiba, A Slaughter, AJ Sliwa, K Smirnov, D Smith, JR Snider, FD Snihur, R Soderberg, M Soha, A Somalwar, S Sorin, V Spalding, J Spinella, F Squillacioti, P Stanitzki, M Staveris-Polykalas, A St Denis, R Stelzer, B Stelzer-Chilton, O Stentz, D Strologas, J Stuart, D Suh, JS Sukhanov, A Sumorok, K Sun, H Suzuki, T Taffard, A Tafirout, R Takashima, R Takeuchi, Y Takikawa, K Tanaka, M Tanaka, R Tecchio, M Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tiwari, V Tkaczyk, S Toback, D Tokar, S Tollefson, K Tomura, T Tonelli, D Tonnesmann, M Torre, S Torretta, D Tourneur, S Trischuk, W Tsuchiya, R Tsuno, S Turini, N Ukegawa, F Unverhau, T Uozumi, S Usynin, D Vacavant, L Vaiciulis, A Vallecorsa, S Varganov, A Vataga, E Velev, G Veramendi, G Veszpremi, V Vickey, T Vidal, R Vila, I Vilar, R Vollrath, I Volobouev, I Wurthwein, F Wagner, P Wagner, RG Wagner, RL Wagner, W Wallny, R Walter, T Wan, Z Wang, MJ Wang, SM Warburton, A Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Whiteson, D Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wittich, P Wolbers, S Wolfe, C Worm, S Wright, T Wu, X Wynne, SM Yagil, A Yamamoto, K Yamaoka, J Yamashita, Y Yang, C Yang, UK Yao, WM Yeh, GP Yoh, J Yorita, K Yoshida, T Yu, I Yu, SS Yun, JC Zanello, L Zanetti, A Zaw, I Zetti, F Zhang, X Zhou, J Zucchelli, S AF Abulencia, A Acosta, D Adelman, J Affolder, T Akimoto, T Albrow, MG Ambrose, D Amerio, S Amidei, D Anastassov, A Anikeev, K Annovi, A Antos, J Aoki, M Apollinari, G Arguin, JF Arisawa, T Artikov, A Ashmanskas, W Attal, A Azfar, F Azzi-Bacchetta, P Azzurri, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Bartsch, V Bauer, G Bedeschi, F Behari, S Belforte, S Bellettini, G Bellinger, J Belloni, A Ben Haim, E Benjamin, D Beretvas, A Beringer, J Berry, T Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Boisvert, V Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bourov, S Boveia, A Brau, B Bromberg, C Brubaker, E Budagov, J Budd, HS Budd, S Burkett, K Busetto, G Bussey, P Byrum, KL Cabrera, S Campanelli, M Campbell, M Canelli, F Canepa, A Carlsmith, D Carosi, R Carron, S Casarsa, M Castro, A Catastini, P Cauz, D Cavalli-Sforza, M Cerri, A Cerrito, L Chang, SH Chapman, J Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Cho, I Cho, K Chokheli, D Chou, JP Chu, PH Chuang, SH Chung, K Chung, WH Chung, YS Ciljak, M Ciobanu, CI Ciocci, MA Clark, A Clark, D Coca, M Connolly, A Convery, ME Conway, J Cooper, B Copic, K Cordelli, M Cortiana, G Cruz, A Cuevas, J Culbertson, R Cyr, D DaRonco, S D'Auria, S D'onofrio, M Dagenhart, D de Barbaro, P De Cecco, S Deisher, A De Lentdecker, G Dell'Orso, M Demers, S Demortier, L Deng, J Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, JR DiTuro, P Dorr, C Dominguez, A Donati, S Donega, M Dong, P Donini, J Dorigo, T Dube, S Ebina, K Efron, J Ehlers, J Erbacher, R Errede, D Errede, S Eusebi, R Fang, HC Farrington, S Fedorko, I Fedorko, WT Feild, RG Feindt, M Fernandez, JP Field, R Flanagan, G Flores-Castillo, LR Foland, A Forrester, S Foster, GW Franklin, M Freeman, JC Fujii, Y Furic, I Gajjar, A Gallinaro, M Galyardt, J Garcia, JE Sciveres, MG Garfinkel, AF Gay, C Gerberich, H Gerchtein, E Gerdes, D Giagu, S di Giovanni, GP Giannetti, P Gibson, A Gibson, K Ginsburg, C Giokaris, N Giolo, K Giordani, M Giunta, M Giurgiu, G Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Gomez-Ceballos, G Goncharov, M Gonzalez, O Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Griffiths, M Grinstein, S Grosso-Pilcher, C Grundler, U da Costa, JG Haber, C Hahn, SR Hahn, K Halkiadakis, E Hamilton, A Han, BY Handler, R Happacher, F Hara, K Hare, M Harper, S Harr, RF Harris, RM Hatakeyama, K Hauser, J Hays, C Hayward, H Heijboer, A Heinemann, B Heinrich, J Hennecke, M Herndon, M Heuser, J Hidas, D Hill, CS Hirschbuehl, D Hocker, A Holloway, A Hou, S Houlden, M Hsu, SC Huffman, BT Hughes, RE Huston, J Ikado, K Incandela, J Introzzi, G Iori, M Ishizawa, Y Ivanov, A Iyutin, B James, E Jang, D Jayatilaka, B Jeans, D Jensen, H Jeon, EJ Jones, M Joo, KK Jun, SY Junk, TR Kamon, T Kang, J Karagoz-Unel, M Karchin, PE Kato, Y Kemp, Y Kephart, R Kerzel, U Khotilovich, V Kilminster, B Kim, DH Kim, HS Kim, JE Kim, MJ Kim, MS Kim, SB Kim, SH Kim, YK Kirby, M Kirsch, L Klimenko, S Klute, M Knuteson, B Ko, BR Kobayashi, H Kondo, K Kong, DJ Konigsberg, J Kordas, K Korytov, A Kotwal, AV Kovalev, A Kraus, J Kravchenko, I Kreps, M Kreymer, A Kroll, J Krumnack, N Kruse, M Krutelyov, V Kuhlmann, SE Kusakabe, Y Kwang, S Laasanen, AT Lai, S Lami, S Lammel, S Lancaster, M Lander, RL Lannon, K Lath, A Latino, G Lazzizzera, I Lecci, C LeCompte, T Lee, J Lee, J Lee, SW Lefevre, R Leonardo, N Leone, S Levy, S Lewis, JD Li, K Lin, C Lin, CS Lindgren, M Lipeles, E Liss, TM Lister, A Litvintsev, DO Liu, T Liu, Y Lockyer, NS Loginov, A Loreti, M Loverre, P Lu, RS Lucchesi, D Lujan, P Lukens, P Lungu, G Lyons, L Lys, J Lysak, R Lytken, E Mack, P MacQueen, D Madrak, R Maeshima, K Maksimovic, P Manca, G Margaroli, F Marginean, R Marino, C Martin, A Martin, M Martin, V Martinez, M Maruyama, T Matsunaga, H Mattson, ME Mazini, R Mazzanti, P McFarland, KS McGivern, D McIntyre, P McNamara, P McNulty, R Mehta, A Menzemer, S Menzione, A Merkel, P Mesropian, C Messina, A von der Mey, M Miao, T Miladinovic, N Miles, J Miller, R Miller, JS Mills, C Milnik, M Miquel, R Miscetti, S Mitselmakher, G Miyamoto, A Moggi, N Mohr, B Moore, R Morello, M Fernandez, PM Mulmenstadt, J Mukherjee, A Mulhearn, M Muller, T Mumford, R Murat, P Nachtman, J Nahn, S Nakano, I Napier, A Naumov, D Necula, V Neu, C Neubauer, MS Nielsen, J Nigmanov, T Nodulman, L Norniella, O Ogawa, T Oh, SH Oh, YD Okusawa, T Oldeman, R Orava, R Osterberg, K Pagliarone, C Palencia, E Paoletti, R Papadimitriou, V Papikonomou, A Paramonov, AA Parks, B Pashapour, S Patrick, J Pauletta, G Paulini, M Paus, C Pellett, DE Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, K Plager, C Pondrom, L Pope, G Portell, X Poukhov, O Pounder, N Prakoshyn, F Pronko, A Proudfoot, J Ptohos, F Punzi, G Pursley, J Rademacker, J Rahaman, A Rakitin, A Rappoccio, S Ratnikov, F Reisert, B Rekovic, V van Remortel, N Renton, P Rescigno, M Richter, S Rimondi, F Rinnert, K Ristori, L Robertson, WJ Robson, A Rodrigo, T Rogers, E Rolli, S Roser, R Rossi, M Rossin, R Rott, C Ruiz, A Russ, J Rusu, V Ryan, D Saarikko, H Sabik, S Safonov, A Sakumoto, WK Salamanna, G Salto, O Saltzberg, D Sanchez, C Santi, L Sarkar, S Sato, K Savard, P Savoy-Navarro, A Scheidle, T Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Schwarz, T Scodellaro, L Scott, AL Scribano, A Scuri, F Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Sexton-Kennedy, L Sfiligoi, I Shapiro, MD Shears, T Shepard, PF Sherman, D Shimojima, M Shochet, M Shon, Y Shreyber, I Sidoti, A Sill, A Sinervo, P Sisakyan, A Sjolin, J Skiba, A Slaughter, AJ Sliwa, K Smirnov, D Smith, JR Snider, FD Snihur, R Soderberg, M Soha, A Somalwar, S Sorin, V Spalding, J Spinella, F Squillacioti, P Stanitzki, M Staveris-Polykalas, A St Denis, R Stelzer, B Stelzer-Chilton, O Stentz, D Strologas, J Stuart, D Suh, JS Sukhanov, A Sumorok, K Sun, H Suzuki, T Taffard, A Tafirout, R Takashima, R Takeuchi, Y Takikawa, K Tanaka, M Tanaka, R Tecchio, M Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tiwari, V Tkaczyk, S Toback, D Tokar, S Tollefson, K Tomura, T Tonelli, D Tonnesmann, M Torre, S Torretta, D Tourneur, S Trischuk, W Tsuchiya, R Tsuno, S Turini, N Ukegawa, F Unverhau, T Uozumi, S Usynin, D Vacavant, L Vaiciulis, A Vallecorsa, S Varganov, A Vataga, E Velev, G Veramendi, G Veszpremi, V Vickey, T Vidal, R Vila, I Vilar, R Vollrath, I Volobouev, I Wurthwein, F Wagner, P Wagner, RG Wagner, RL Wagner, W Wallny, R Walter, T Wan, Z Wang, MJ Wang, SM Warburton, A Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Whiteson, D Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wittich, P Wolbers, S Wolfe, C Worm, S Wright, T Wu, X Wynne, SM Yagil, A Yamamoto, K Yamaoka, J Yamashita, Y Yang, C Yang, UK Yao, WM Yeh, GP Yoh, J Yorita, K Yoshida, T Yu, I Yu, SS Yun, JC Zanello, L Zanetti, A Zaw, I Zetti, F Zhang, X Zhou, J Zucchelli, S CA CDF Collaboration TI Search for anomalous semileptonic decay of heavy flavor hadrons produced in association with a W boson at CDF II SO PHYSICAL REVIEW D LA English DT Article ID PHYSICS AB We present a search for anomalous semileptonic decays of heavy flavor hadrons produced in association with a W boson in proton-antiproton collisions at root s=1.96 TeV. We use 162 pb(-1) of data collected with the CDF II detector at the Fermilab Tevatron Collider. We select events with one W boson and at least one jet with an identified secondary vertex. In the jets with a secondary vertex we look for a semileptonic decay to a muon. We compare the number of jets with both a secondary vertex and a semileptonic decay and the kinematic properties of these jets, with the standard model expectation of W plus heavy flavor production and decay. No discrepancy is seen between the observation and the expectation, and we set limits on the production cross section of a B-like hadron with an anomalously high semileptonic branching ratio. C1 Univ Illinois, Urbana, IL 61801 USA. Helsinki Inst Phys, FIN-00014 Helsinki, Finland. Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland. Harvard Univ, Cambridge, MA 02138 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 701701, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Liverpool, Liverpool L69 7ZE, Merseyside, England. UCL, London WC1E 6BT, England. MIT, Cambridge, MA 02139 USA. McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada. Univ Toronto, Toronto, ON M5S 1A7, Canada. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Moscow Theoret & Expt Phys Inst, Moscow 117259, Russia. Univ New Mexico, Albuquerque, NM 87131 USA. Northwestern Univ, Evanston, IL 60208 USA. Ohio State Univ, Columbus, OH 43210 USA. Okayama Univ, Okayama 7008530, Japan. Osaka City Univ, Osaka 588, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy. Univ Paris 06, LPNHE, IN2P3, Paris, France. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Scuola Normale Super Pisa, I-56127 Pisa, Italy. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Purdue Univ, W Lafayette, IN 47907 USA. Univ Rochester, Rochester, NY 14627 USA. Rockefeller Univ, New York, NY 10021 USA. Univ Roma La Sapienza, Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas A&M Univ, College Stn, TX 77843 USA. Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Tufts Univ, Medford, MA 02155 USA. Waseda Univ, Tokyo 169, Japan. Wayne State Univ, Detroit, MI 48201 USA. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06520 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain. Baylor Univ, Waco, TX 76798 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Brandeis Univ, Waltham, MA 02254 USA. Univ Calif Davis, Livermore, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Duke Univ, Durham, NC 27708 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Florida, Gainesville, FL 32611 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Geneva, CH-1211 Geneva 4, Switzerland. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. RP Univ Illinois, Urbana, IL 61801 USA. RI Gorelov, Igor/J-9010-2015; Prokoshin, Fedor/E-2795-2012; Leonardo, Nuno/M-6940-2016; Canelli, Florencia/O-9693-2016; Kim, Soo-Bong/B-7061-2014; Lysak, Roman/H-2995-2014; Scodellaro, Luca/K-9091-2014; Paulini, Manfred/N-7794-2014; Russ, James/P-3092-2014; Lazzizzera, Ignazio/E-9678-2015; vilar, rocio/P-8480-2014; Cabrera Urban, Susana/H-1376-2015; Garcia, Jose /H-6339-2015; ciocci, maria agnese /I-2153-2015; Cavalli-Sforza, Matteo/H-7102-2015; Muelmenstaedt, Johannes/K-2432-2015; Introzzi, Gianluca/K-2497-2015; Ruiz, Alberto/E-4473-2011; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012; Ivanov, Andrew/A-7982-2013; Connolly, Amy/J-3958-2013; Warburton, Andreas/N-8028-2013; St.Denis, Richard/C-8997-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012; Amerio, Silvia/J-4605-2012; Punzi, Giovanni/J-4947-2012; messina, andrea/C-2753-2013; Annovi, Alberto/G-6028-2012 OI Gorelov, Igor/0000-0001-5570-0133; Prokoshin, Fedor/0000-0001-6389-5399; Leonardo, Nuno/0000-0002-9746-4594; Canelli, Florencia/0000-0001-6361-2117; Scodellaro, Luca/0000-0002-4974-8330; Paulini, Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155; Lazzizzera, Ignazio/0000-0001-5092-7531; ciocci, maria agnese /0000-0003-0002-5462; Muelmenstaedt, Johannes/0000-0003-1105-6678; Introzzi, Gianluca/0000-0002-1314-2580; Ruiz, Alberto/0000-0002-3639-0368; Ivanov, Andrew/0000-0002-9270-5643; Warburton, Andreas/0000-0002-2298-7315; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Annovi, Alberto/0000-0002-4649-4398 NR 18 TC 3 Z9 3 U1 1 U2 4 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 MAR PY 2006 VL 73 IS 5 AR 051101 DI 10.1103/PhysRevD.73.051101 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800001 ER PT J AU Acosta, D Affolder, T Albrow, MG Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Behari, S Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Beretvas, A Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bromberg, C Brubaker, E Budagov, J Budd, HS Burkett, K Busetto, G Byrum, KL Cabrera, S Campbell, M Carithers, W Carlsmith, D Castro, A Cauz, D Cerri, A Cerrito, L Chapman, J Chen, C Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Chu, ML Chung, JY Chung, WH Chung, YS Ciobanu, CI Clark, AG Coca, M Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S de Barbaro, P De Cecco, S Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, JR Dominguez, A Donati, S D'Onofrio, M Dorigo, T Eddy, N Erbacher, R Errede, D Errede, S Eusebi, R Farrington, S Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Flores-Castillo, LR Foster, GW Franklin, M Friedman, J Furic, I Gallinaro, M Garcia-Sciveres, M Garfinkel, AF Gay, C Gerdes, DW Gerstein, E Giagu, S Giannetti, P Giolo, K Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Goncharov, M Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Grosso-Pilcher, C Guenther, M Guimaraes da Costa, J Haber, C Hahn, SR Halkiadakis, E Handler, R Happacher, F Hara, K Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Hennecke, M Herndon, M Hill, C Hocker, A Hoffman, KD Hou, S Huffman, BT Hughes, R Huston, J Incandela, J Introzzi, G Iori, M Issever, C Ivanov, A Iwata, Y Iyutin, B James, E Jones, M Kamon, T Kang, J Unel, KM Kartal, S Kasha, H Kato, Y Kennedy, RD Kephart, R Kilminster, B Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, TH Kim, YK Kirby, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kuznetsova, N Laasanen, AT Lami, S Lammel, S Lancaster, J Lancaster, M Lander, R Lannon, K Lath, A Latino, G LeCompte, T Le, Y Lee, J Lee, SW Leonardo, N Leone, S Lewis, JD Li, K Lin, CS Lindgren, M Liss, TM Litvintsev, DO Liu, T Lockyer, NS Loginov, A Loreti, M Lucchesi, D Lukens, P Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martin, M Martin, A Martin, V Martinez, M Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, JS Miller, R Miscetti, S Mitselmakher, G Moggi, N Moore, R Moulik, T Mukherjee, A Mulhearn, M Muller, T Munar, A Murat, P Nachtman, J Nahn, S Nakano, I Napora, R Nelson, C Nelson, T Neu, C Neubauer, MS Newman-Holmes, C Niell, F Nigmanov, T Nodulman, L Oh, SH Oh, YD Ohsugi, T Okusawa, T Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Patrick, J Pauletta, G Paulini, M Pauly, T Paus, C Pellett, D Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, KT Pompos, A Pondrom, L Pope, G Poukov, O Pratt, T Prokoshin, F Proudfoot, J Ptohos, F Punzi, G Rademacker, J Rakitine, A Ratnikov, F Ray, H Reichold, A Renton, P Rescigno, M Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Ryan, D Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sarkar, S Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scribano, A Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Sill, A Sinervo, P Slaughter, AJ Sliwa, K Snider, FD Snihur, R Spezziga, M Spiegel, L Spinella, F Spiropulu, M Stefanini, A Strologas, J Stuart, D Sukhanov, A Sumorok, K Suzuki, T Takashima, R Takikawa, K Tanaka, M Tecchio, M Teng, PK Terashi, K Tesarek, RJ Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tkaczyk, S Toback, D Tollefson, K Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W Tseng, J Tsybychev, D Turini, N Ukegawa, F Unverhau, T Vaiciulis, T Varganov, A Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Wagner, RG Wagner, RL Wagner, W Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wolbers, S Wolter, M Worm, S Wu, X Wurthwein, F Yang, UK Yao, W Yeh, GP Yi, K Yoh, J Yoshida, T Yu, I Yu, S Yun, JC Zanello, L Zanetti, A Zetti, F Zucchelli, S AF Acosta, D Affolder, T Albrow, MG Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Behari, S Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Beretvas, A Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bromberg, C Brubaker, E Budagov, J Budd, HS Burkett, K Busetto, G Byrum, KL Cabrera, S Campbell, M Carithers, W Carlsmith, D Castro, A Cauz, D Cerri, A Cerrito, L Chapman, J Chen, C Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Chu, ML Chung, JY Chung, WH Chung, YS Ciobanu, CI Clark, AG Coca, M Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S de Barbaro, P De Cecco, S Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, JR Dominguez, A Donati, S D'Onofrio, M Dorigo, T Eddy, N Erbacher, R Errede, D Errede, S Eusebi, R Farrington, S Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Flores-Castillo, LR Foster, GW Franklin, M Friedman, J Furic, I Gallinaro, M Garcia-Sciveres, M Garfinkel, AF Gay, C Gerdes, DW Gerstein, E Giagu, S Giannetti, P Giolo, K Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Goncharov, M Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Grosso-Pilcher, C Guenther, M Guimaraes da Costa, J Haber, C Hahn, SR Halkiadakis, E Handler, R Happacher, F Hara, K Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Hennecke, M Herndon, M Hill, C Hocker, A Hoffman, KD Hou, S Huffman, BT Hughes, R Huston, J Incandela, J Introzzi, G Iori, M Issever, C Ivanov, A Iwata, Y Iyutin, B James, E Jones, M Kamon, T Kang, J Unel, KM Kartal, S Kasha, H Kato, Y Kennedy, RD Kephart, R Kilminster, B Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, TH Kim, YK Kirby, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kuznetsova, N Laasanen, AT Lami, S Lammel, S Lancaster, J Lancaster, M Lander, R Lannon, K Lath, A Latino, G LeCompte, T Le, Y Lee, J Lee, SW Leonardo, N Leone, S Lewis, JD Li, K Lin, CS Lindgren, M Liss, TM Litvintsev, DO Liu, T Lockyer, NS Loginov, A Loreti, M Lucchesi, D Lukens, P Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martin, M Martin, A Martin, V Martinez, M Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, JS Miller, R Miscetti, S Mitselmakher, G Moggi, N Moore, R Moulik, T Mukherjee, A Mulhearn, M Muller, T Munar, A Murat, P Nachtman, J Nahn, S Nakano, I Napora, R Nelson, C Nelson, T Neu, C Neubauer, MS Newman-Holmes, C Niell, F Nigmanov, T Nodulman, L Oh, SH Oh, YD Ohsugi, T Okusawa, T Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Patrick, J Pauletta, G Paulini, M Pauly, T Paus, C Pellett, D Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, KT Pompos, A Pondrom, L Pope, G Poukov, O Pratt, T Prokoshin, F Proudfoot, J Ptohos, F Punzi, G Rademacker, J Rakitine, A Ratnikov, F Ray, H Reichold, A Renton, P Rescigno, M Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Ryan, D Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sarkar, S Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scribano, A Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Sill, A Sinervo, P Slaughter, AJ Sliwa, K Snider, FD Snihur, R Spezziga, M Spiegel, L Spinella, F Spiropulu, M Stefanini, A Strologas, J Stuart, D Sukhanov, A Sumorok, K Suzuki, T Takashima, R Takikawa, K Tanaka, M Tecchio, M Teng, PK Terashi, K Tesarek, RJ Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tkaczyk, S Toback, D Tollefson, K Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W Tseng, J Tsybychev, D Turini, N Ukegawa, F Unverhau, T Vaiciulis, T Varganov, A Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Wagner, RG Wagner, RL Wagner, W Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wolbers, S Wolter, M Worm, S Wu, X Wurthwein, F Yang, UK Yao, W Yeh, GP Yi, K Yoh, J Yoshida, T Yu, I Yu, S Yun, JC Zanello, L Zanetti, A Zetti, F Zucchelli, S TI Measurement of the azimuthal angle distribution of leptons from W boson decays as a function of the W transverse momentum in p(p)over-bar collisions at root s = 1.8 TeV SO PHYSICAL REVIEW D LA English DT Article ID HADRONIC COLLISIONS; CROSS-SECTIONS; COLLIDERS AB We present the first measurement of the A(2) and A(3) angular coefficients of the W boson produced in proton-antiproton collisions. We study W -> e nu(e) and W ->mu nu(mu) candidate events produced in association with at least one jet at CDF, during Run Ia and Run Ib of the Tevatron at root s=1.8 TeV. The corresponding integrated luminosity was 110 pb(-1). The jet balances the transverse momentum of the W and introduces QCD effects in W boson production. The extraction of the angular coefficients is achieved through the direct measurement of the azimuthal angle of the charged lepton in the Collins-Soper rest-frame of the W boson. The angular coefficients are measured as a function of the transverse momentum of the W boson. The electron, muon, and combined results are in good agreement with the standard model prediction, up to order alpha(s)(2) in QCD. C1 Univ Florida, Gainesville, FL 32611 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Brandeis Univ, Waltham, MA 02254 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Duke Univ, Durham, NC 27708 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Florida, Gainesville, FL 32611 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Geneva, CH-1211 Geneva 4, Switzerland. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Harvard Univ, Cambridge, MA 02138 USA. Hiroshima Univ, Higashihiroshima 724, Japan. Univ Illinois, Urbana, IL 61801 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. UCL, London WC1E 6BT, England. MIT, Cambridge, MA 02139 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Inst Theoret & Expt Phys, Moscow 117259, Russia. Univ New Mexico, Albuquerque, NM 87131 USA. Northwestern Univ, Evanston, IL 60208 USA. Ohio State Univ, Columbus, OH 43210 USA. Osaka City Univ, Osaka 588, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, Italy. Scuola Normale Super Pisa, I-56100 Pisa, Italy. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Purdue Univ, W Lafayette, IN 47907 USA. Univ Rochester, Rochester, NY 14627 USA. Rockefeller Univ, New York, NY 10021 USA. Univ Rome 1, Inst Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas A&M Univ, College Stn, TX 77843 USA. Texas Tech Univ, Lubbock, TX 79409 USA. Univ Toronto, Inst Particle Phys, Toronto, ON M5S 1A7, Canada. Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Tufts Univ, Medford, MA 02155 USA. Waseda Univ, Tokyo 169, Japan. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06520 USA. RP Univ Florida, Gainesville, FL 32611 USA. RI Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Prokoshin, Fedor/E-2795-2012; Leonardo, Nuno/M-6940-2016; Paulini, Manfred/N-7794-2014; vilar, rocio/P-8480-2014; Ruiz, Alberto/E-4473-2011; De Cecco, Sandro/B-1016-2012; Wolter, Marcin/A-7412-2012; St.Denis, Richard/C-8997-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012; Punzi, Giovanni/J-4947-2012; Ivanov, Andrew/A-7982-2013; Kim, Soo-Bong/B-7061-2014; Scodellaro, Luca/K-9091-2014; Connolly, Amy/J-3958-2013; Cabrera Urban, Susana/H-1376-2015 OI Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Prokoshin, Fedor/0000-0001-6389-5399; Leonardo, Nuno/0000-0002-9746-4594; Paulini, Manfred/0000-0002-6714-5787; Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Ivanov, Andrew/0000-0002-9270-5643; Scodellaro, Luca/0000-0002-4974-8330; NR 17 TC 6 Z9 6 U1 2 U2 7 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 MAR PY 2006 VL 73 IS 5 AR 052002 DI 10.1103/PhysRevD.73.052002 PG 29 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800012 ER PT J AU Anderson, PR Eftekharzadeh, A Hu, BL AF Anderson, PR Eftekharzadeh, A Hu, BL TI Self-force on a scalar charge in radial infall from rest using the Hadamard-WKB expansion SO PHYSICAL REVIEW D LA English DT Article ID STRESS-ENERGY TENSOR; GRAVITATIONAL-WAVE ASTRONOMY; SCHWARZSCHILD BLACK-HOLE; CURVED SPACETIME; POINT-CHARGE; FIELD; PARTICLES AB We present an analytic method based on the Hadamard-WKB expansion to calculate the self-force for a particle with scalar charge that undergoes radial infall in a Schwarzschild spacetime after being held at rest until a time t=0. Our result is valid in the case of short duration from the start. It is possible to use the Hadamard-WKB expansion in this case because the value of the integral of the retarded Green's function over the particle's entire past trajectory can be expressed in terms of two integrals over the time period that the particle has been falling. This analytic result is expected to be useful as a check for numerical prescriptions including those involving mode-sum regularization and for any other analytical approximations to self-force calculations. C1 Wake Forest Univ, Dept Phys, Winston Salem, NC 27109 USA. Univ Maryland, Dept Phys, College Pk, MD 20742 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Wake Forest Univ, Dept Phys, Winston Salem, NC 27109 USA. EM anderson@wfu.edu; eftekhar@wam.umd.edu; hub@physics.umd.edu NR 48 TC 12 Z9 12 U1 0 U2 2 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 MAR PY 2006 VL 73 IS 6 AR 064023 DI 10.1103/PhysRevD.73.064023 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DD UT WOS:000236466100070 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges, E Palano, A Pappagallo, M Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Battaglia, M Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Chevalier, N Cottingham, WN Cuhadar-Donszelmann, T Fulsom, BG Hearty, C Knecht, NS Mattison, TS McKenna, JA Khan, A Kyberd, P Saleem, M Teodorescu, L Blinov, AE Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bondioli, M Bruinsma, M Chao, M Curry, S Eschrich, I Kirkby, D Lankford, AJ Lund, P Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Weinstein, AJR Foulkes, SD Gary, JW Long, O Shen, BC Wang, K Zhang, L del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Flacco, CJ Heusch, CA Kroseberg, J Lockman, WS Nesom, G Schalk, T Schumm, BA Seiden, A Spradlin, P Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Andreassen, R Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Blanc, F Bloom, P Chen, S Ford, WT Hirschauer, JF Kreisel, A Nauenberg, U Olivas, A Rankin, P Ruddick, WO Smith, JG Ulmer, KA Wagner, SR Zhang, J Chen, A Eckhart, EA Soffer, A Toki, WH Wilson, RJ Zeng, Q Altenburg, D Feltresi, E Hauke, A Spaan, B Brandt, T Brose, J Dickopp, M Klose, V Lacker, HM Nogowski, R Otto, S Petzold, A Schott, G Schubert, J Schubert, KR Schwierz, R Sundermann, JE Bernard, D Bonneaud, GR Grenier, P Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ Gradl, W Muheim, F Playfer, S Xie, Y Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Brandenburg, G Chaisanguanthum, KS Morii, M Won, E Wu, J Dubitzky, RS Langenegger, U Marks, J Schenk, S Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Flack, RL Gaillard, JR Morton, GW Nash, JA Nikolich, MB Taylor, GP Vazquez, WP Charles, MJ Mader, WF Mallik, U Mohapatra, AK Cochran, J Crawley, HB Eyges, V Meyer, WT Prell, S Rosenberg, EI Rubin, AE Yi, J Arnaud, N Davier, M Giroux, X Grosdidier, G Hocker, A Le Diberder, F Lepeltier, V Lutz, AM Oyanguren, A Petersen, TC Pierini, M Plaszczynski, S Rodier, S Roudeau, P Schune, MH Stocchi, A Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Chavez, CA Forster, IJ Fry, JR Gabathuler, E Gamet, R George, KA Hutchcroft, DE Parry, RJ Payne, DJ Schofield, KC Touramanis, C Cormack, CM Di Lodovico, F Menges, W Sacco, R Brown, CL Cowan, G Flaecher, HU Green, MG Hopkins, DA Jackson, PS McMahon, TR Ricciardi, S Salvatore, F Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Edgar, CL Hodgkinson, MC Kelly, MP Lafferty, GD Naisbit, MT Williams, JC Chen, C Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Roberts, DA Simi, G Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Koptchev, VB Li, X Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Koeneke, K Sciolla, G Sekula, SJ Spitznagel, M Taylor, F Yamamoto, RK Kim, H Patel, PM Robertson, SH Lazzaro, A Lombardo, V Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Viaud, B Nicholson, H Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Bulten, H Raven, G Snoek, HL Wilden, L Jessop, CP LoSecco, JM Allmendinger, T Benelli, G Gan, KK Honscheid, K Hufnagel, D Jackson, PD Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Lu, M Potter, CT Sinev, NB Strom, D Strube, J Torrence, E Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Benayoun, M Briand, H Chauveau, J David, P Del Buono, L de la Vaissiere, C Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pacetti, S Pioppi, M Angelini, C 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Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, SL Yu, Z Neal, H AF Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges, E Palano, A Pappagallo, M Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Battaglia, M Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Chevalier, N Cottingham, WN Cuhadar-Donszelmann, T Fulsom, BG Hearty, C Knecht, NS Mattison, TS McKenna, JA Khan, A Kyberd, P Saleem, M 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Spitznagel, M Taylor, F Yamamoto, RK Kim, H Patel, PM Robertson, SH Lazzaro, A Lombardo, V Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Viaud, B Nicholson, H Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Bulten, H Raven, G Snoek, HL Wilden, L Jessop, CP LoSecco, JM Allmendinger, T Benelli, G Gan, KK Honscheid, K Hufnagel, D Jackson, PD Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Lu, M Potter, CT Sinev, NB Strom, D Strube, J Torrence, E Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Benayoun, M Briand, H Chauveau, J David, P Del Buono, L de la Vaissiere, C Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pacetti, S Pioppi, M Angelini, C Batignani, G Bettarini, S Bucci, F Calderini, G Carpinelli, M Cenci, R Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Walsh, J Haire, M Judd, D Wagoner, DE Biesiada, J Danielson, N Elmer, P Lau, YP Lu, C Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Wilson, FF Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Graziani, G de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Allen, MT Aston, D Bakel, N Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Coleman, JP Convery, MR Cristinziani, M Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W Fan, S Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hast, C Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Stelzer, J Su, D Sullivan, MK Suzuki, K Swain, S Thompson, JM Va'vra, J Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Yi, K Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Wappler, FR Zain, SB Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bomben, M Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Vitale, L Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Latham, TE Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, SL Yu, Z Neal, H CA BABAR Collaboration TI Search for the decay B+ -> tau(+)nu(tau) SO PHYSICAL REVIEW D LA English DT Article ID CP-VIOLATION AB We search for the rare leptonic decay B+->tau(+)nu(tau) in a sample of 232x10(6) B (B) over bar pairs collected with the BABAR detector at the SLAC PEP-II B-Factory. Signal events are selected by examining the properties of the B meson recoiling against the semileptonic decay B--> D(*0)l(-)nu(l). We find no evidence for a signal and set an upper limit on the branching fraction of B(B+->tau(+)nu(tau))< 2.8x10(-4) at the 90% confidence level. We combine this result with a previous, statistically independent BABAR search for B+->tau(+)nu(tau) to give an upper limit of B(B+->tau(+)nu(tau))< 2.6x10(-4) at the 90% confidence level. C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. 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RI Lusiani, Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Lusiani, Alberto/A-3329-2016; Di Lodovico, Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Luppi, Eleonora/A-4902-2015; Monge, Maria Roberta/G-9127-2012; Saeed, Mohammad Alam/J-7455-2012; Oyanguren, Arantza/K-6454-2014; Kravchenko, Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; M, Saleem/B-9137-2013; Della Ricca, Giuseppe/B-6826-2013; Rotondo, Marcello/I-6043-2012; Peters, Klaus/C-2728-2008; Neri, Nicola/G-3991-2012; de Groot, Nicolo/A-2675-2009; Bellini, Fabio/D-1055-2009; Lista, Luca/C-5719-2008; de Sangro, Riccardo/J-2901-2012; Patrignani, Claudia/C-5223-2009; Forti, Francesco/H-3035-2011; Cavallo, Nicola/F-8913-2012; Negrini, Matteo/C-8906-2014; Roe, Natalie/A-8798-2012 OI Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Lusiani, Alberto/0000-0002-6876-3288; Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Egede, Ulrik/0000-0001-5493-0762; Raven, Gerhard/0000-0002-2897-5323; Luppi, Eleonora/0000-0002-1072-5633; Monge, Maria Roberta/0000-0003-1633-3195; Saeed, Mohammad Alam/0000-0002-3529-9255; Oyanguren, Arantza/0000-0002-8240-7300; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304; Della Ricca, Giuseppe/0000-0003-2831-6982; Rotondo, Marcello/0000-0001-5704-6163; Peters, Klaus/0000-0001-7133-0662; Neri, Nicola/0000-0002-6106-3756; Bellini, Fabio/0000-0002-2936-660X; de Sangro, Riccardo/0000-0002-3808-5455; Patrignani, Claudia/0000-0002-5882-1747; Forti, Francesco/0000-0001-6535-7965; Negrini, Matteo/0000-0003-0101-6963; NR 16 TC 11 Z9 11 U1 0 U2 0 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. 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D PD MAR PY 2006 VL 73 IS 5 AR 057101 DI 10.1103/PhysRevD.73.057101 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800092 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges, E Palano, A Pappagallo, M Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Battaglia, M Best, DS Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, JA Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Cottingham, WN Walker, D Cuhadar-Donszelmann, T Fulsom, BG Hearty, C Knecht, NS Mattison, TS McKenna, JA Khan, A Kyberd, P Saleem, M Teodorescu, L Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Todyshev, KY Bondioli, M Bruinsma, M Chao, M Curry, S Eschrich, I Kirkby, D Lankford, AJ Lund, P Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Abachi, S Buchanan, C Foulkes, SD Gary, JW Long, O Shen, BC Wang, K Zhang, L del Re, D Hadavand, HK Hill, EJ Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Richman, JD Beck, TW Eisner, AM Flacco, CJ Heusch, CA Kroseberg, J Lockman, WS Nesom, G Schalk, T Schumm, BA Seiden, A Spradlin, P Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Minamora, JS Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Andreassen, R Mancinelli, G Meadows, BT Sokoloff, MD Blanc, F Bloom, PC Chen, S Ford, WT Hirschauer, JF Kreisel, A Nauenberg, U Olivas, A Ruddick, WO Smith, JG Ulmer, KA Wagner, SR Zhang, J Chen, A Eckhart, EA Soffer, A Toki, WH Wilson, RJ Winklmeier, F Zeng, Q Altenburg, DD Feltresi, E Hauke, A Jasper, H Spaan, B Brandt, T Dickopp, M Klose, V Lacker, HM Nogowski, R Otto, S Petzold, A Schubert, J Schubert, KR Schwierz, R Sundermann, JE Volk, A Bernard, D Bonneaud, GR Grenier, P Latour, E Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ Gradl, W Muheim, F Playfer, S Xie, Y Andreotti, M Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Pacetti, S Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Lo Vetere, M Macri, MM Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Brandenburg, G Chaisanguanthum, KS Morii, M Wu, J Dubitzky, RS Marks, J Schenk, S Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Flack, RL Gaillard, JR Nash, JA Nikolich, MB Vazquez, PW Chai, X Charles, MJ Mader, WF Mallik, U Ziegler, V Cochran, J Crawley, HB Dong, L Eyges, V Meyer, WT Prell, S Rosenberg, EI Rubin, AE Schott, G Arnaud, N Davier, M Grosdidier, G Hocker, A Le Diberder, F Lepeltier, V Lutz, AM Oyanguren, A Petersen, TC Pruvot, S Rodier, S Roudeau, P Schune, MH Stocchi, A Wang, WF Wormser, G Cheng, CH Lange, DJ Wright, DM Bevan, AJ Chavez, CA Forster, IJ Fry, JR Gabathuler, E Gamet, R George, KA Hutchcroft, DE Payne, DJ Schofield, KC Touramanis, C Di Lodovico, F Menges, W Sacco, R Brown, CL Cowan, G Flaecher, HU Green, MG Hopkins, DA Jackson, PS McMahon, TR Ricciardi, S Salvatore, F Brown, DN Davis, CL Allison, J Barlow, NR Barlow, RJ Chia, YM Edgar, CL Kelly, MP Lafferty, GD Naisbit, MT Williams, JC Yi, JI Chen, C Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Roberts, DA Simi, G Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Li, X Moore, TB Saremi, S Staengle, H Willocq, SY Cowan, R Koeneke, K Sciolla, G Sekula, SJ Spitznagel, M Taylor, F Yamamoto, RK Kim, H Patel, PM Potter, CT Robertson, SH Lazzaro, A Lombardo, V Palombo, FF Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Viaud, FB Nicholson, H Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Bulten, H Raven, G Snoek, HL Jessop, CP LoSecco, JM Allmendinger, T Benelli, G Gan, KK Honscheid, K Hufnagel, D Jackson, PD Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Blount, NL Brau, J Frey, R Igonkina, O Lu, M Rahmat, R Sinev, NB Strom, D Strube, J Torrence, E Galeazzi, F Margoni, M Morandin, M Pompili, A Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Benayoun, M Chauveau, J David, P Del Buono, L de la Vaissiere, C Hamon, O Hartfiel, BL John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bucci, F Calderini, G Carpinelli, M Cenci, R Forti, F Giorgi, MA Lusiani, A Marchiori, G Mazur, MA Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Walsh, J Haire, M Judd, D Wagoner, DE Biesiada, J Danielson, N Elmer, P Lau, YP Lu, C Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Marco, ED Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, SF Voena, C Schroder, H Waldi, R Adye, T De Groot, N Franek, B Olaiya, EO Wilson, FF Emery, S Gaidot, A Ganzhur, SF Hamel de Monchenault, G Kozanecki, W Legendre, M Mayer, B Vasseur, G Yeche, C Zito, M Park, W Purohit, MV Weidemann, AW Wilson, JR Abe, T Allen, MT Aston, D Bartoldus, R Berger, N Boyarski, AM Claus, R Coleman, JP Convery, MR Cristinziani, M Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W Fan, S Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hast, C Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL MacFarlane, DB Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Stelzer, J Su, D Sullivan, MK Suzuki, K Swain, SK Thompson, JM Va'vra, J van Bakel, N Weaver, M Weinstein, AJR Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Yi, K Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Wilden, L Ahmed, S Alam, MS Bula, R Ernst, JA Jain, V Pan, B Saeed, MA Wappler, FR Zain, SB Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bomben, M Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Vitale, L Azzolini, V Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Kowalewski, R Nugent, IM Roney, JM Sobie, RJ Back, JJ Harrison, PF Latham, TE Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, MT Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Mohapatra, AK Pan, Y Pierini, M Prepost, R Tan, P Wu, SL Yu, Z Neal, H AF Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges, E Palano, A Pappagallo, M Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Battaglia, M Best, DS Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, JA Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Cottingham, WN Walker, D Cuhadar-Donszelmann, T Fulsom, BG Hearty, C Knecht, NS Mattison, TS McKenna, JA Khan, A Kyberd, P Saleem, M Teodorescu, L Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Todyshev, KY Bondioli, M Bruinsma, M Chao, M Curry, S Eschrich, I Kirkby, D Lankford, AJ Lund, P Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Abachi, S Buchanan, C Foulkes, SD Gary, JW Long, O Shen, BC Wang, K Zhang, L del Re, D Hadavand, HK Hill, EJ Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Richman, JD Beck, TW Eisner, AM Flacco, CJ Heusch, CA Kroseberg, J Lockman, WS Nesom, G Schalk, T Schumm, BA Seiden, A Spradlin, P Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Minamora, JS Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Andreassen, R Mancinelli, G Meadows, BT Sokoloff, MD Blanc, F Bloom, PC Chen, S Ford, WT Hirschauer, JF Kreisel, A Nauenberg, U Olivas, A Ruddick, WO Smith, JG Ulmer, KA Wagner, SR Zhang, J Chen, A Eckhart, EA Soffer, A Toki, WH Wilson, RJ Winklmeier, F Zeng, Q Altenburg, DD Feltresi, E Hauke, A Jasper, H Spaan, B Brandt, T Dickopp, M Klose, V Lacker, HM Nogowski, R Otto, S Petzold, A Schubert, J Schubert, KR Schwierz, R Sundermann, JE Volk, A Bernard, D Bonneaud, GR Grenier, P Latour, E Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ Gradl, W Muheim, F Playfer, S Xie, Y Andreotti, M Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Pacetti, S Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Lo Vetere, M Macri, MM Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Brandenburg, G Chaisanguanthum, KS Morii, M Wu, J Dubitzky, RS Marks, J Schenk, S Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Flack, RL Gaillard, JR Nash, JA Nikolich, MB Vazquez, PW Chai, X Charles, MJ Mader, WF Mallik, U Ziegler, V Cochran, J Crawley, HB Dong, L Eyges, V Meyer, WT Prell, S Rosenberg, EI Rubin, AE Schott, G Arnaud, N Davier, M Grosdidier, G Hocker, A Le Diberder, F Lepeltier, V Lutz, AM Oyanguren, A Petersen, TC Pruvot, S Rodier, S Roudeau, P Schune, MH Stocchi, A Wang, WF Wormser, G Cheng, CH Lange, DJ Wright, DM Bevan, AJ Chavez, CA Forster, IJ Fry, JR Gabathuler, E Gamet, R George, KA Hutchcroft, DE Payne, DJ Schofield, KC Touramanis, C Di Lodovico, F Menges, W Sacco, R Brown, CL Cowan, G Flaecher, HU Green, MG Hopkins, DA Jackson, PS McMahon, TR Ricciardi, S Salvatore, F Brown, DN Davis, CL Allison, J Barlow, NR Barlow, RJ Chia, YM Edgar, CL Kelly, MP Lafferty, GD Naisbit, MT Williams, JC Yi, JI Chen, C Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Roberts, DA Simi, G Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Li, X Moore, TB Saremi, S Staengle, H Willocq, SY Cowan, R Koeneke, K Sciolla, G Sekula, SJ Spitznagel, M Taylor, F Yamamoto, RK Kim, H Patel, PM Potter, CT Robertson, SH Lazzaro, A Lombardo, V Palombo, FF Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Viaud, FB Nicholson, H Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Bulten, H Raven, G Snoek, HL Jessop, CP LoSecco, JM Allmendinger, T Benelli, G Gan, KK Honscheid, K Hufnagel, D Jackson, PD Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Blount, NL Brau, J Frey, R Igonkina, O Lu, M Rahmat, R Sinev, NB Strom, D Strube, J Torrence, E Galeazzi, F Margoni, M Morandin, M Pompili, A Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Benayoun, M Chauveau, J David, P Del Buono, L de la Vaissiere, C Hamon, O Hartfiel, BL John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bucci, F Calderini, G Carpinelli, M Cenci, R Forti, F Giorgi, MA Lusiani, A Marchiori, G Mazur, MA Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Walsh, J Haire, M Judd, D Wagoner, DE Biesiada, J Danielson, N Elmer, P Lau, YP Lu, C Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Marco, ED Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, SF Voena, C Schroder, H Waldi, R Adye, T De Groot, N Franek, B Olaiya, EO Wilson, FF Emery, S Gaidot, A Ganzhur, SF Hamel de Monchenault, G Kozanecki, W Legendre, M Mayer, B Vasseur, G Yeche, C Zito, M Park, W Purohit, MV Weidemann, AW Wilson, JR Abe, T Allen, MT Aston, D Bartoldus, R Berger, N Boyarski, AM Claus, R Coleman, JP Convery, MR Cristinziani, M Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W Fan, S Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hast, C Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL MacFarlane, DB Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Stelzer, J Su, D Sullivan, MK Suzuki, K Swain, SK Thompson, JM Va'vra, J van Bakel, N Weaver, M Weinstein, AJR Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Yi, K Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Wilden, L Ahmed, S Alam, MS Bula, R Ernst, JA Jain, V Pan, B Saeed, MA Wappler, FR Zain, SB Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bomben, M Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Vitale, L Azzolini, V Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Kowalewski, R Nugent, IM Roney, JM Sobie, RJ Back, JJ Harrison, PF Latham, TE Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, MT Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Mohapatra, AK Pan, Y Pierini, M Prepost, R Tan, P Wu, SL Yu, Z Neal, H TI Measurement of CP observables for the decays B-+/-->(DCPK +/-)-K-0 SO PHYSICAL REVIEW D LA English DT Article AB We present a study of the decay B-->(D(CP)K-)-K-0 and its charge conjugate, where D-(CP)(0) is reconstructed in CP-even, CP-odd, and non-CP flavor eigenstates, based on a sample of 232x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at the PEP-II e(+)e(-) storage ring. We measure the partial-rate charge asymmetries A(CP +/-) and the ratios R-CP +/- of the B ->(DK)-K-0 decay branching fractions as measured in CP +/- and non-CP D-0 decays: A(CP+)=0.35 +/- 0.13(stat)+/- 0.04(syst), A(CP-)=-0.06 +/- 0.13(stat)+/- 0.04(syst), RCP+=0.90 +/- 0.12(stat)+/- 0.04(syst), and RCP-=0.86 +/- 0.10(stat)+/- 0.05(syst). C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. 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Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00161 Rome, Italy. Ist Nazl Fis Nucl, I-00161 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Phys Corpusculaire Lab, Clermont Ferrand, France. Univ Basilicata, I-85100 Potenza, Italy. RP Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. RI Lusiani, Alberto/A-3329-2016; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; dong, liaoyuan/A-5093-2015; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; de Sangro, Riccardo/J-2901-2012; M, Saleem/B-9137-2013; Cavallo, Nicola/F-8913-2012; Lista, Luca/C-5719-2008; Saeed, Mohammad Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; Bellini, Fabio/D-1055-2009; Neri, Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; Monge, Maria Roberta/G-9127-2012; Oyanguren, Arantza/K-6454-2014; Luppi, Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani, Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Rizzo, Giuliana/A-8516-2015; OI Lusiani, Alberto/0000-0002-6876-3288; Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Bettarini, Stefano/0000-0001-7742-2998; Cibinetto, Gianluigi/0000-0002-3491-6231; dong, liaoyuan/0000-0002-4773-5050; Peters, Klaus/0000-0001-7133-0662; de Sangro, Riccardo/0000-0002-3808-5455; Saeed, Mohammad Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Bellini, Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; Patrignani, Claudia/0000-0002-5882-1747; Monge, Maria Roberta/0000-0003-1633-3195; Oyanguren, Arantza/0000-0002-8240-7300; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Pacetti, Simone/0000-0002-6385-3508; Galeazzi, Fulvio/0000-0002-6830-9982; Covarelli, Roberto/0000-0003-1216-5235; Rizzo, Giuliana/0000-0003-1788-2866; Paoloni, Eugenio/0000-0001-5969-8712; Faccini, Riccardo/0000-0003-2613-5141; Cavoto, Gianluca/0000-0003-2161-918X; Barlow, Roger/0000-0002-8295-8612 NR 16 TC 15 Z9 15 U1 1 U2 7 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 MAR PY 2006 VL 73 IS 5 AR 051105 DI 10.1103/PhysRevD.73.051105 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800005 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges, E Palano, A Pappagallo, M Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Battaglia, M Best, DS Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, JA Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Cottingham, WN Walker, D Cuhadar-Donszelmann, T Fulsom, BG Hearty, C Knecht, NS Mattison, TS McKenna, JA Khan, A Kyberd, P Saleem, M Teodorescu, L Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Todyshev, KY Bondioli, M Bruinsma, M Chao, M Curry, S Eschrich, I Kirkby, D Lankford, AJ Lund, P Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Abachi, S Buchanan, C Foulkes, SD Gary, JW Long, O Shen, BC Wang, K Zhang, L del Re, D Hadavand, HK Hill, EJ Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Richman, JD Beck, TW Eisner, AM Flacco, CJ Heusch, CA Kroseberg, J Lockman, WS Nesom, G Schalk, T Schumm, BA Seiden, A Spradlin, P Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Andreassen, R Mancinelli, G Meadows, BT Sokoloff, MD Blanc, F Bloom, PC Chen, S Ford, WT Hirschauer, JF Kreisel, A Nauenberg, U Olivas, A Ruddick, WO Smith, JG Ulmer, KA Wagner, SR Zhang, J Chen, A Eckhart, EA Soffer, A Toki, WH Wilson, RJ Winklmeier, F Zeng, Q Altenburg, DD Feltresi, E Hauke, A Jasper, H Spaan, B Brandt, T Dickopp, M Klose, V Lacker, HM Nogowski, R Otto, S Petzold, A Schubert, J Schubert, KR Schwierz, R Sundermann, JE Volk, A Bernard, D Bonneaud, GR Grenier, P Latour, E Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ Gradl, W Muheim, F Playfer, S Xie, Y Andreotti, M Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Pacetti, S Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Vetere, ML Macri, MM Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Brandenburg, G Chaisanguanthum, KS Morii, M Wu, J Dubitzky, RS Marks, J Schenk, S Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Flack, RL Gaillard, JR Nash, JA Nikolich, MB Vazquez, WP Chai, X Charles, MJ Mader, WF Mallik, U Ziegler, V Cochran, J Crawley, HB Dong, L Eyges, V Meyer, WT Prell, S Rosenberg, EI Rubin, AE Schott, G Arnaud, N Davier, M Grosdidier, G Hocker, A Diberder, FL Lepeltier, V Lutz, AM Oyanguren, A Petersen, TC Pruvot, S Rodier, S Roudeau, P Schune, MH Stocchi, A Wang, WF Wormser, G Cheng, CH Lange, DJ Wright, DM Bevan, AJ Chavez, CA Forster, IJ Fry, JR Gabathuler, E Gamet, R George, KA Hutchcroft, DE Payne, DJ Schofield, KC Touramanis, C Lodovico, FD Menges, W Sacco, R Brown, CL Cowan, G Flaecher, HU Green, MG Hopkins, DA Jackson, PS McMahon, TR Ricciardi, S Salvatore, F Brown, DN Davis, CL Allison, J Barlow, NR Barlow, RJ Chia, YM Edgar, CL Kelly, MP Lafferty, GD Naisbit, MT Williams, JC Yi, JI Chen, C Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Roberts, DA Simi, G Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Li, X Moore, TB Saremi, S Staengle, H Willocq, SY Cowan, R Koeneke, K Sciolla, G Sekula, SJ Spitznagel, M Taylor, F Yamamoto, RK Kim, H Patel, PM Potter, CT Robertson, SH Lazzaro, A Lombardo, V Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Viaud, FB Nicholson, H Cavallo, N Nardo, GD Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Bulten, H Raven, G Snoek, HL Jessop, CP LoSecco, JM Allmendinger, T Benelli, G Gan, KK Honscheid, K Hufnagel, D Jackson, PD Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Blount, NL Brau, J Frey, R Igonkina, O Lu, M Rahmat, R Sinev, NB Strom, D Strube, J Torrence, E Galeazzi, F Margoni, M Morandin, M Pompili, A Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Benayoun, M Chauveau, J David, P Buono, LD de la Vaissiere, C Hamon, O Hartfiel, BL John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bucci, F Calderini, G Carpinelli, M Cenci, R Forti, F Giorgi, MA Lusiani, A Marchiori, G Mazur, MA Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Walsh, J Haire, M Judd, D Wagoner, DE Biesiada, J Danielson, N Elmer, P Lau, YP Lu, C Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Marco, ED Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Gioi, LL Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Schroder, H Waldi, R Adye, T Groot, ND Franek, B Olaiya, EO Wilson, FF Emery, S Gaidot, A Ganzhur, SF de Monchenault, GH Kozanecki, W Legendre, M Mayer, B Vasseur, G Yeche, C Zito, M Park, W Purohit, MV Weidemann, AW Wilson, JR Allen, MT Aston, D Bartoldus, R Berger, N Boyarski, AM Claus, R Coleman, JP Convery, MR Cristinziani, M Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Halyo, V Hast, C Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL MacFarlane, DB Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Stelzer, J Su, D Sullivan, MK Suzuki, K Swain, SK Thompson, JM Va'vra, J van Bakel, N Weaver, M Weinstein, AJR Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Yi, K Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Wilden, L Ahmed, S Alam, MS Bula, R Ernst, JA Jain, V Pan, B Saeed, MA Wappler, FR Zain, SB Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bomben, M Bosisio, L Cartaro, C Cossutti, F Ricca, GD Dittongo, S Grancagnolo, S Lanceri, L Vitale, L Azzolini, V Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Kowalewski, R Nugent, IM Roney, JM Sobie, RJ Back, JJ Harrison, PF Latham, TE Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, MT Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Mohapatra, AK Pan, Y Pierini, M Prepost, R Tan, P Wu, SL Yu, Z Neal, H AF Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges, E Palano, A Pappagallo, M Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Battaglia, M Best, DS Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, JA Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP Cottingham, WN Walker, D Cuhadar-Donszelmann, T Fulsom, BG Hearty, C Knecht, NS Mattison, TS McKenna, JA Khan, A Kyberd, P Saleem, M Teodorescu, L Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Todyshev, KY Bondioli, M Bruinsma, M Chao, M Curry, S Eschrich, I Kirkby, D Lankford, AJ Lund, P Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Abachi, S Buchanan, C Foulkes, SD Gary, JW Long, O Shen, BC Wang, K Zhang, L del Re, D Hadavand, HK Hill, EJ Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Richman, JD Beck, TW Eisner, AM Flacco, CJ Heusch, CA Kroseberg, J Lockman, WS Nesom, G Schalk, T Schumm, BA Seiden, A Spradlin, P Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Andreassen, R Mancinelli, G Meadows, BT Sokoloff, MD Blanc, F Bloom, PC Chen, S Ford, WT Hirschauer, JF Kreisel, A Nauenberg, U Olivas, A Ruddick, WO Smith, JG Ulmer, KA Wagner, SR Zhang, J Chen, A Eckhart, EA Soffer, A Toki, WH Wilson, RJ Winklmeier, F Zeng, Q Altenburg, DD Feltresi, E Hauke, A Jasper, H Spaan, B Brandt, T Dickopp, M Klose, V Lacker, HM Nogowski, R Otto, S Petzold, A Schubert, J Schubert, KR Schwierz, R Sundermann, JE Volk, A Bernard, D Bonneaud, GR Grenier, P Latour, E Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ Gradl, W Muheim, F Playfer, S Xie, Y Andreotti, M Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Pacetti, S Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Vetere, ML Macri, MM Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Brandenburg, G Chaisanguanthum, KS Morii, M Wu, J Dubitzky, RS Marks, J Schenk, S Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Flack, RL Gaillard, JR Nash, JA Nikolich, MB Vazquez, WP Chai, X Charles, MJ Mader, WF Mallik, U Ziegler, V Cochran, J Crawley, HB Dong, L Eyges, V Meyer, WT Prell, S Rosenberg, EI Rubin, AE Schott, G Arnaud, N Davier, M Grosdidier, G Hocker, A Diberder, FL Lepeltier, V Lutz, AM Oyanguren, A Petersen, TC Pruvot, S Rodier, S Roudeau, P Schune, MH Stocchi, A Wang, WF Wormser, G Cheng, CH Lange, DJ Wright, DM Bevan, AJ Chavez, CA Forster, IJ Fry, JR Gabathuler, E Gamet, R George, KA Hutchcroft, DE Payne, DJ Schofield, KC Touramanis, C Lodovico, FD Menges, W Sacco, R Brown, CL Cowan, G Flaecher, HU Green, MG Hopkins, DA Jackson, PS McMahon, TR Ricciardi, S Salvatore, F Brown, DN Davis, CL Allison, J Barlow, NR Barlow, RJ Chia, YM Edgar, CL Kelly, MP Lafferty, GD Naisbit, MT Williams, JC Yi, JI Chen, C Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Roberts, DA Simi, G Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Li, X Moore, TB Saremi, S Staengle, H Willocq, SY Cowan, R Koeneke, K Sciolla, G Sekula, SJ Spitznagel, M Taylor, F Yamamoto, RK Kim, H Patel, PM Potter, CT Robertson, SH Lazzaro, A Lombardo, V Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Viaud, FB Nicholson, H Cavallo, N Nardo, GD Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Bulten, H Raven, G Snoek, HL Jessop, CP LoSecco, JM Allmendinger, T Benelli, G Gan, KK Honscheid, K Hufnagel, D Jackson, PD Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Blount, NL Brau, J Frey, R Igonkina, O Lu, M Rahmat, R Sinev, NB Strom, D Strube, J Torrence, E Galeazzi, F Margoni, M Morandin, M Pompili, A Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Benayoun, M Chauveau, J David, P Buono, LD de la Vaissiere, C Hamon, O Hartfiel, BL John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bucci, F Calderini, G Carpinelli, M Cenci, R Forti, F Giorgi, MA Lusiani, A Marchiori, G Mazur, MA Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Walsh, J Haire, M Judd, D Wagoner, DE Biesiada, J Danielson, N Elmer, P Lau, YP Lu, C Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G D'Orazio, A Marco, ED Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Gioi, LL Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Schroder, H Waldi, R Adye, T Groot, ND Franek, B Olaiya, EO Wilson, FF Emery, S Gaidot, A Ganzhur, SF de Monchenault, GH Kozanecki, W Legendre, M Mayer, B Vasseur, G Yeche, C Zito, M Park, W Purohit, MV Weidemann, AW Wilson, JR Allen, MT Aston, D Bartoldus, R Berger, N Boyarski, AM Claus, R Coleman, JP Convery, MR Cristinziani, M Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Halyo, V Hast, C Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL MacFarlane, DB Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Stelzer, J Su, D Sullivan, MK Suzuki, K Swain, SK Thompson, JM Va'vra, J van Bakel, N Weaver, M Weinstein, AJR Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Yi, K Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Roat, C Wilden, L Ahmed, S Alam, MS Bula, R Ernst, JA Jain, V Pan, B Saeed, MA Wappler, FR Zain, SB Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Bomben, M Bosisio, L Cartaro, C Cossutti, F Ricca, GD Dittongo, S Grancagnolo, S Lanceri, L Vitale, L Azzolini, V Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Kowalewski, R Nugent, IM Roney, JM Sobie, RJ Back, JJ Harrison, PF Latham, TE Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, MT Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mellado, B Mihalyi, A Mohapatra, AK Pan, Y Pierini, M Prepost, R Tan, P Wu, SL Yu, Z Neal, H TI The e(+)e(-)-> 3(pi(+)pi(-)), 2(pi(+)pi(-)pi(0)) and K(+)K(-)2(pi(+)pi(-)) cross sections at center-of-mass energies from production threshold to 4.5 GeV measured with initial-state radiation SO PHYSICAL REVIEW D LA English DT Article ID NARROW DIP STRUCTURE; E(+)E(-) ANNIHILATION; BHABHA SCATTERING; E&E ANNIHILATION; TAGGED PHOTONS; 1.9 GEV/C(2); MONTE-CARLO; PHYSICS AB We study the processes e(+)e(-)-> 3(pi(+)pi(-))gamma, 2(pi(+)pi(-)pi(0))gamma and K(+)K(-)2(pi(+)pi(-))gamma, with the photon radiated from the initial state. About 20 000, 33 000 and 4000 fully reconstructed events, respectively, have been selected from 232 fb(-1) of BABAR data. The invariant mass of the hadronic final state defines the effective e(+)e(-) center-of-mass energy, so that these data can be compared with the corresponding direct e(+)e(-) measurements. From the 3(pi(+)pi(-)), 2(pi(+)pi(-)pi(0)) and K(+)K(-)2(pi(+)pi(-)) mass spectra, the cross sections for the processes e(+)e(-)-> 3(pi(+)pi(-)), e(+)e(-)-> 2(pi(+)pi(-)pi(0)) and e(+)e(-)-> K(+)K(-)2(pi(+)pi(-)) are measured for center-of-mass energies from production threshold to 4.5 GeV. The uncertainty in the cross section measurement is typically 6%-15%. We observe a structure at 1.9 GeV in both cross sections and a resonance structure with mass 1645 +/- 0.008 GeV/c(2) and width 0.114 +/- 0.014 GeV when the omega(782)eta final state is extracted. We observe the J/psi in all these final states and measure the corresponding branching fractions. C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Phys Expt, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, LLR, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany. Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ Sci & Technol, Ames, IA 50011 USA. Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany. Lab Accelerateur Lineaire, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 7ZE, Merseyside, England. Queen Mary Univ London, London E1 4NS, England. Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40292 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. NIKHEF H, Natl Inst Nucl & High Energy Phys, NL-1009 DB Amsterdam, Netherlands. Univ Notre Dame, Notre Dame, IN 46556 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, I-35131 Padua, Italy. Univ Paris 06, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France. Univ Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Univ Pisa, Dipartimento Fis, Scuola Normale Super, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. RP Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Oyanguren, Arantza/K-6454-2014; Kravchenko, Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Luppi, Eleonora/A-4902-2015; Monge, Maria Roberta/G-9127-2012; Roe, Natalie/A-8798-2012; Saeed, Mohammad Alam/J-7455-2012; Della Ricca, Giuseppe/B-6826-2013; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Bellini, Fabio/D-1055-2009; dong, liaoyuan/A-5093-2015; Rizzo, Giuliana/A-8516-2015; Rotondo, Marcello/I-6043-2012; Neri, Nicola/G-3991-2012; Grancagnolo, Sergio/J-3957-2015; de Sangro, Riccardo/J-2901-2012; Negrini, Matteo/C-8906-2014; Forti, Francesco/H-3035-2011; Lusiani, Alberto/A-3329-2016; Lusiani, Alberto/N-2976-2015; Lista, Luca/C-5719-2008; Cavallo, Nicola/F-8913-2012; Di Lodovico, Francesca/L-9109-2016; Morandin, Mauro/A-3308-2016; Patrignani, Claudia/C-5223-2009; OI Oyanguren, Arantza/0000-0002-8240-7300; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Luppi, Eleonora/0000-0002-1072-5633; Monge, Maria Roberta/0000-0003-1633-3195; Saeed, Mohammad Alam/0000-0002-3529-9255; Wilson, Robert/0000-0002-8184-4103; Strube, Jan/0000-0001-7470-9301; Barlow, Roger/0000-0002-8295-8612; Chen, Chunhui /0000-0003-1589-9955; Raven, Gerhard/0000-0002-2897-5323; Della Ricca, Giuseppe/0000-0003-2831-6982; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Egede, Ulrik/0000-0001-5493-0762; Peters, Klaus/0000-0001-7133-0662; Bellini, Fabio/0000-0002-2936-660X; Paoloni, Eugenio/0000-0001-5969-8712; Lanceri, Livio/0000-0001-8220-3095; Carpinelli, Massimo/0000-0002-8205-930X; Sciacca, Crisostomo/0000-0002-8412-4072; Adye, Tim/0000-0003-0627-5059; Lafferty, George/0000-0003-0658-4919; Faccini, Riccardo/0000-0003-2613-5141; Cavoto, Gianluca/0000-0003-2161-918X; Hamel de Monchenault, Gautier/0000-0002-3872-3592; dong, liaoyuan/0000-0002-4773-5050; Pacetti, Simone/0000-0002-6385-3508; Galeazzi, Fulvio/0000-0002-6830-9982; Covarelli, Roberto/0000-0003-1216-5235; Rizzo, Giuliana/0000-0003-1788-2866; Cristinziani, Markus/0000-0003-3893-9171; Rotondo, Marcello/0000-0001-5704-6163; Neri, Nicola/0000-0002-6106-3756; Grancagnolo, Sergio/0000-0001-8490-8304; de Sangro, Riccardo/0000-0002-3808-5455; Negrini, Matteo/0000-0003-0101-6963; Forti, Francesco/0000-0001-6535-7965; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Di Lodovico, Francesca/0000-0003-3952-2175; Morandin, Mauro/0000-0003-4708-4240; Patrignani, Claudia/0000-0002-5882-1747; Cibinetto, Gianluigi/0000-0002-3491-6231; Bettarini, Stefano/0000-0001-7742-2998 NR 31 TC 373 Z9 378 U1 7 U2 16 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 MAR PY 2006 VL 73 IS 5 AR 052003 DI 10.1103/PhysRevD.73.052003 PG 26 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800013 ER PT J AU Bao, RY Carena, M Lykken, J Park, M Santiago, J AF Bao, RY Carena, M Lykken, J Park, M Santiago, J TI Revamped braneworld gravity SO PHYSICAL REVIEW D LA English DT Article ID VELTMAN-ZAKHAROV DISCONTINUITY; EXTRA DIMENSIONS; PHENOMENOLOGY; RADION; MODEL; MASS; BIGRAVITY; HIERARCHY; ABSENCE; BRANES AB Gravity in five-dimensional braneworld backgrounds often exhibits problematic features, including kinetic ghosts, strong coupling, and the van Dam-Veltman-Zakharov (vDVZ) discontinuity. These problems are an obstacle to producing and analyzing braneworld models with interesting and potentially observable modifications of 4d gravity. We examine these problems in a general AdS(5)/AdS(4) setup with two branes and localized curvature from arbitrary brane kinetic terms. We use the interval approach and an explicit straight gauge-fixing. We compute the complete quadratic gauge-fixed effective 4d action, as well as the leading cubic order corrections. We compute the exact Green's function for gravity as seen on the brane. In the full parameter space, we exhibit the regions which avoid kinetic ghosts and tachyons. We give a general formula for the strong coupling scale, i.e., the energy scale at which the linearized treatment of gravity breaks down, for relevant regions of the parameter space. We show how the vDVZ discontinuity can be naturally but nontrivially avoided by ultralight graviton modes. We present a direct comparison of warping versus localized curvature in terms of their effects on graviton mode couplings. We exhibit the first example of Dvali-Gabadadze-Porrati (DGP)-like crossover behavior in a general warped setup. C1 Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Univ Chicago, Dept Phys, Chicago, IL 60637 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA. EM rbao@theory.uchicago.edu; carena@fnal.gov; lykken@fnal.gov; mpark@uchicago.edu; jsantiag@fnal.gov RI Santiago, Jose/D-9109-2016 OI Santiago, Jose/0000-0003-3585-5626 NR 58 TC 17 Z9 17 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 6 AR 064026 DI 10.1103/PhysRevD.73.064026 PG 25 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DD UT WOS:000236466100073 ER PT J AU Beane, SR Bedaque, PF Orginos, K Savage, MJ AF Beane, SR Bedaque, PF Orginos, K Savage, MJ TI I=2 pi pi scattering from fully-dynamical mixed-action lattice QCD SO PHYSICAL REVIEW D LA English DT Article ID GENERALIZED PARTON DISTRIBUTIONS; 2-PION WAVE-FUNCTION; WILSON FERMIONS; PHASE-SHIFT; CHIRAL FERMIONS; LENGTH; ENERGY; QUARKS; APPROXIMATION; ALPHA(S) AB We compute the I=2 pi pi scattering length at pion masses of m(pi)similar to 294, 348, and 484 MeV in fully-dynamical lattice QCD using Luscher's finite-volume method. The calculation is performed with domain-wall valence-quark propagators on asqtad-improved MILC configurations with staggered sea quarks at a single lattice spacing, b similar to 0.125 fm. Chiral perturbation theory is used to perform the extrapolation of the scattering length from lattice quark masses down to the physical value, and we find m(pi)a(2)=-0.0426 +/- 0.0006 +/- 0.0003 +/- 0.0018, in good agreement with experiment. The I=2 pi pi scattering phase shift is calculated to be delta=-43 +/- 10 +/- 5 degrees at vertical bar p vertical bar similar to 544 MeV for m(pi) similar to 484 MeV. C1 Univ New Hampshire, Dept Phys, Durham, NH 03824 USA. Jefferson Lab, Newport News, VA 23606 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA. CALTECH, Pasadena, CA 91125 USA. Univ Washington, Dept Phys, Seattle, WA 98195 USA. RP Univ New Hampshire, Dept Phys, Durham, NH 03824 USA. NR 61 TC 84 Z9 84 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 5 AR 054503 DI 10.1103/PhysRevD.73.054503 PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800063 ER PT J AU Bergstrom, L Hooper, D AF Bergstrom, L Hooper, D TI Dark matter and gamma rays from draco: MAGIC, GLAST and CACTUS SO PHYSICAL REVIEW D LA English DT Article ID GALACTIC-CENTER; NEUTRALINO ANNIHILATION; CONSTRAINTS; DIRECTION; BREAKING; HALO AB The dwarf spheroidal galaxy Draco has long been considered likely to be one of the brightest point sources of gamma rays generated through dark matter annihilations. Recent studies of this object have found that it remains largely intact from tidal striping, and may be more massive than previously thought. In this article, we revisit Draco as a source of dark matter annihilation radiation, with these new observational constraints in mind. We discuss the prospects for the experiments MAGIC and GLAST to detect dark matter in Draco, as well as constraints from the observations of EGRET. We also discuss the possibility that the CACTUS experiment has already detected gamma rays from Draco. We find that it is difficult to generate the flux reported by CACTUS without resorting to nonthermally produced WIMPs and/or a density spike in Draco's dark matter distribution due to the presence of an intermediate mass black hole. We also find that for most annihilation modes, a positive detection of Draco by CACTUS would be inconsistent with the lack of events seen by EGRET. C1 Stockholm Univ, AlbaNova Univ Ctr, Dept Phys, SE-10691 Stockholm, Sweden. Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA. RP Bergstrom, L (reprint author), Stockholm Univ, AlbaNova Univ Ctr, Dept Phys, SE-10691 Stockholm, Sweden. NR 40 TC 57 Z9 57 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 6 AR 063510 DI 10.1103/PhysRevD.73.063510 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DD UT WOS:000236466100027 ER PT J AU Bern, Z Dixon, LJ Kosower, DA AF Bern, Z Dixon, LJ Kosower, DA TI Bootstrapping multiparton loop amplitudes in QCD SO PHYSICAL REVIEW D LA English DT Review ID SUPER-YANG-MILLS; GAUGE-THEORY AMPLITUDES; MULTI-GLUON SCATTERING; HELICITY AMPLITUDES; TREE AMPLITUDES; CROSS-SECTIONS; TWISTOR SPACE; MHV VERTICES; UNITARITY; ORDER AB We present a new method for computing complete one-loop amplitudes, including their rational parts, in nonsupersymmetric gauge theory. This method merges the unitarity method with on-shell recursion relations. It systematizes a unitarity-factorization bootstrap approach previously applied by the authors to the one-loop amplitudes required for next-to-leading order QCD corrections to the processes e(+)e(-) -> Z,gamma* -> 4 jets and pp -> W + 2 jets. We illustrate the method by reproducing the one-loop color-ordered five-gluon helicity amplitudes in QCD that interfere with the tree amplitude, namely A(5;1)(1(-),2(-),3(+),4(+),5(+)) and A(5;1)(1(-),2(+),3(-),4(+),5(+)). Then we describe the construction of the six- and seven-gluon amplitudes with two adjacent negative-helicity gluons, A(6;1)(1(-),2(-),3(+),4(+),5(+),6(+)) and A(7;1)(1(-),2(-),3(+),4(+),5(+),6(+),7(+)), which uses the previously-computed logarithmic parts of the amplitudes as input. We present a compact expression for the six-gluon amplitude. No loop integrals are required to obtain the rational parts. C1 Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. CEA Saclay, Serv Phys Theor, Lab Direct Sci Mat, F-91191 Gif Sur Yvette, France. RP Bern, Z (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. NR 102 TC 126 Z9 126 U1 0 U2 1 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 MAR PY 2006 VL 73 IS 6 AR 065013 DI 10.1103/PhysRevD.73.065013 PG 20 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DD UT WOS:000236466100097 ER PT J AU Berruto, F Blum, T Orginos, K Soni, A AF Berruto, F Blum, T Orginos, K Soni, A TI Calculation of the neutron electric dipole moment with two dynamical flavors of domain wall fermions SO PHYSICAL REVIEW D LA English DT Article ID STRONG CP-VIOLATION; QUANTUM CHROMODYNAMICS; LATTICE QCD; CONSERVATION; BOSON AB We present a study of the neutron electric dipole moment ((d) over right arrow (N)) within the framework of lattice QCD with two flavors of dynamical light quarks. The dipole moment is sensitive to the topological structure of the gauge fields, and accuracy can only be achieved by using dynamical, or sea quark, calculations. However, the topological charge evolves slowly in these calculations, leading to a relatively large uncertainty in (d) over right arrow (N). It is shown, using quenched configurations, that a better sampling of the charge distribution reduces this problem, but because the CP even part of the fermion determinant is absent, both the topological charge distribution and (d) over right arrow (N) are pathological in the chiral limit. We discuss the statistical and systematic uncertainties arising from the topological charge distribution and unphysical size of the quark mass in our calculations and prospects for eliminating them. Our calculations employ the RBC collaboration two flavor domain wall fermion and DBW2 gauge action lattices with inverse lattice spacing a(-1)approximate to 1.7 GeV, physical volume V approximate to(2 fm)(3), and light quark mass roughly equal to the strange quark mass (m(sea)=0.03 and 0.04). We determine a value of the electric dipole moment that is zero within (statistical) errors, from which we obtain the bound parallel to(d) over right arrow (N)parallel to less than or similar to 0.02e-theta-fm. Satisfactory results for the magnetic and electric form factors of the proton and neutron are also obtained and presented. C1 Brookhaven Natl Lab, High Energy Theory Grp, Upton, NY 11973 USA. Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA. Univ Connecticut, Dept Phys, Storrs, CT 06269 USA. Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA. Jefferson Lab, Newport News, VA 23606 USA. RP Brookhaven Natl Lab, High Energy Theory Grp, Upton, NY 11973 USA. NR 39 TC 41 Z9 41 U1 0 U2 1 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 MAR PY 2006 VL 73 IS 5 AR 054509 DI 10.1103/PhysRevD.73.054509 PG 16 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800069 ER PT J AU Bousso, R Mints, AL AF Bousso, R Mints, AL TI Decoding the matrix: Coincident membranes on the plane wave SO PHYSICAL REVIEW D LA English DT Article ID STRINGS AB At the core of nonperturbative theories of quantum gravity lies the holographic encoding of bulk data in large matrices. At present this mapping is poorly understood. The plane wave matrix model provides a laboratory for isolating aspects of this problem in a controlled setting. At large boosts, configurations of concentric membranes become superselection sectors, whose exact spectra are known. From the bulk point of view, one expects product states of individual membranes to be contained within the full spectrum. However, for non-BPS states this inclusion relation is obscured by Gauss law constraints. Its validity rests on nontrivial relations in representation theory, which we identify and verify by explicit computation. C1 Univ Calif Berkeley, Dept Phys, Ctr Theoret Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Bousso, R (reprint author), Univ Calif Berkeley, Dept Phys, Ctr Theoret Phys, Berkeley, CA 94720 USA. EM bousso@lbl.gov; mints@socrates.berkeley.edu NR 15 TC 1 Z9 1 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 6 AR 066014 DI 10.1103/PhysRevD.73.066014 PG 21 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DD UT WOS:000236466100126 ER PT J AU Campbell, J Ellis, RK Maltoni, F Willenbrock, S AF Campbell, J Ellis, RK Maltoni, F Willenbrock, S TI Production of a Z boson and two jets with one heavy-quark tag SO PHYSICAL REVIEW D LA English DT Article ID SUPERSYMMETRIC HIGGS BOSONS; TOP-QUARK; FERMILAB TEVATRON; HADRON COLLIDERS; FINAL-STATES; COLLISIONS; LHC; SEARCH; TEV; QCD AB We present a next-to-leading-order calculation of the production of a Z boson with two jets, one or more of which contains a heavy quark (Q=c,b). We show that the cross section with only one heavy-quark jet is larger than that with two heavy-quark jets at both the Fermilab Tevatron and the CERN LHC. These processes are the dominant irreducible backgrounds to a Higgs boson produced in association with a Z boson, followed by h -> b (b) over bar. Our calculation makes use of a heavy-quark distribution function, which resums collinear logarithms and makes the next-to-leading-order calculation tractable. C1 CERN, CH-1211 Geneva 23, Switzerland. Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. Catholic Univ Louvain, Inst Theoret Phys, B-1348 Louvain, Belgium. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. RP CERN, CH-1211 Geneva 23, Switzerland. NR 58 TC 34 Z9 34 U1 0 U2 1 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 MAR PY 2006 VL 73 IS 5 AR 054007 DI 10.1103/PhysRevD.73.054007 PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800038 ER PT J AU Ejiri, S Karsch, F Laermann, E Schmidt, C AF Ejiri, S Karsch, F Laermann, E Schmidt, C TI Isentropic equation of state of 2-flavor QCD SO PHYSICAL REVIEW D LA English DT Article ID HEAVY-ION COLLISIONS; FREEZE-OUT; BARYON-NUMBER AB Using Taylor expansions of the pressure obtained previously in studies of 2-flavor QCD at nonzero chemical potential we calculate expansion coefficients for the energy and entropy densities up to O(mu(6)(q)) in the quark chemical potential. We use these series in mu(q)/T to determine lines of constant entropy per baryon number (S/N-B) that characterize the expansion of dense matter created in heavy ion collisions. In the high temperature regime these lines are found to be well approximated by lines of constant mu(q)/T. In the low temperature phase, however, the quark chemical potential is found to increase with decreasing temperature. This is in accordance with resonance gas model calculations. Along the lines of constant S/N-B we calculate the energy density and pressure. Within the accuracy of our present analysis we find that the ratio p/epsilon for T > T-0 as well as the softest point of the equation of state, (p/epsilon)(min)similar or equal to 0.075, show no significant dependence on S/N-B. C1 Univ Tokyo, Dept Phys, Tokyo 1130033, Japan. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Univ Bielefeld, Fak Phys, D-33615 Bielefeld, Germany. RP Univ Tokyo, Dept Phys, Tokyo 1130033, Japan. NR 19 TC 50 Z9 50 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 5 AR 054506 DI 10.1103/PhysRevD.73.054506 PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800066 ER PT J AU Horowitz, GT Silverstein, E AF Horowitz, GT Silverstein, E TI The inside story: Quasilocal tachyons and black holes SO PHYSICAL REVIEW D LA English DT Article ID STRING AMPLITUDES AB We analyze the fate of excitations in regions of closed string tachyon condensate, a question crucial for understanding unitarity in a class of black holes in string theory. First we introduce a simple new example of quasilocal tachyon condensation in a globally stable AdS/CFT background, and review tachyons' appearance in black hole physics. Then we calculate forces on particles and fields in a tachyon phase using a field theoretic model with spatially localized exponentially growing time-dependent masses. This model reveals two features, both supporting unitary evolution in the bulk of spacetime. First, the growing energy of fields sourced by sets of (real and virtual) particles in the tachyon phase yields outward forces on them, leaving behind only combinations which do not source any fields. Secondly, requiring the consistency of perturbative string theory imposes cancellation of a BRST anomaly, which also yields a restricted set of states. Each of these effects supports the notion of a black hole final state arising from string-theoretic dynamics replacing the black hole singularity. C1 Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94305 USA. Stanford Univ, Dept Phys, Stanford, CA 94305 USA. RP Horowitz, GT (reprint author), Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA. NR 57 TC 42 Z9 42 U1 0 U2 0 PU AMERICAN 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 MAR PY 2006 VL 73 IS 6 AR 064016 DI 10.1103/PhysRevD.73.064016 PG 14 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DD UT WOS:000236466100063 ER PT J AU Hu, J Mehen, T AF Hu, J Mehen, T TI Chiral Lagrangian with heavy quark-diquark symmetry SO PHYSICAL REVIEW D LA English DT Article ID DOUBLY-CHARMED BARYONS; DECAY; HADROPRODUCTION; SPECTROSCOPY; PHYSICS; MASSES; NRQCD; MODEL; QCD AB We construct a chiral Lagrangian for doubly heavy baryons and heavy mesons that is invariant under heavy quark-diquark symmetry at leading order and includes the leading O(1/m(Q)) symmetry violating operators. The theory is used to predict the electromagnetic decay width of the J=3/2 member of the ground state doubly heavy baryon doublet. Numerical estimates are provided for doubly charm baryons. We also calculate chiral corrections to doubly heavy baryon masses and strong decay widths of low lying excited doubly heavy baryons. C1 Duke Univ, Dept Phys, Durham, NC 27708 USA. Jefferson Lab, Newport News, VA 23606 USA. RP Duke Univ, Dept Phys, Durham, NC 27708 USA. EM hujie@phy.duke.edu; mehen@phy.duke.edu NR 56 TC 45 Z9 45 U1 0 U2 1 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 MAR PY 2006 VL 73 IS 5 AR 054003 DI 10.1103/PhysRevD.73.054003 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800034 ER PT J AU Laiho, J Van de Water, RS AF Laiho, J Van de Water, RS TI B -> D(*)l nu and B -> Dl nu form factors in staggered chiral perturbation theory SO PHYSICAL REVIEW D LA English DT Article ID LATTICE QCD; MESONS; DECAYS AB We calculate the B -> D and B -> D-* form factors at zero recoil in staggered chiral perturbation theory. We consider heavy-light mesons in which only the light (u, d, or s) quark is staggered; current lattice simulations generally use a highly improved action such as the Fermilab or nonrelativistic QCD action for the heavy (b or c) quark. We work to lowest nontrivial order in the heavy-quark expansion and to one-loop order in the chiral expansion. We present results for a partially quenched theory with three sea quarks in which there are no mass degeneracies (the "1+1+1" theory) and for a partially quenched theory in which the u and d sea quark masses are equal (the "2+1" theory). We also present results for full (2+1) QCD, along with a numerical estimate of the size of staggered discretization errors. Finally, we calculate the finite volume corrections to the form factors and estimate their numerical size in current lattice simulations. C1 Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. RP Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. NR 22 TC 16 Z9 16 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 5 AR 054501 DI 10.1103/PhysRevD.73.054501 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800061 ER PT J AU Linder, EV AF Linder, EV TI Paths of quintessence SO PHYSICAL REVIEW D LA English DT Article ID CARDASSIAN EXPANSION; DARK ENERGY; UNIVERSE; SPACE; MODEL; FLAT AB The structure of the dark energy equation of state phase plane holds important information on the nature of the physics. We explain the bounds of the freezing and thawing models of scalar field dark energy in terms of the tension between the steepness of the potential vs the Hubble drag. Additionally, we extend the phase plane structure to modified gravity theories, examine trajectories of models with certain properties, and categorize regions in terms of scalar field hierarchical parameters, showing that dark energy is generically not a slow roll phenomenon. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 43 TC 74 Z9 74 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 6 AR 063010 DI 10.1103/PhysRevD.73.063010 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DD UT WOS:000236466100015 ER PT J AU Mei, DM Hime, A AF Mei, DM Hime, A TI Muon-induced background study for underground laboratories SO PHYSICAL REVIEW D LA English DT Article ID COSMIC-RAY MUONS; NEUTRON-FLUX; INTENSITY CURVE; MONTE-CARLO; DEPTH; DETECTORS; ENERGIES; TARGETS; HADRONS; TEV AB We provide a comprehensive study of the cosmic-ray muon flux and induced activity as a function of overburden along with a convenient parametrization of the salient fluxes and differential distributions for a suite of underground laboratories ranging in depth from similar to 1 to 8 km.w.e.. Particular attention is given to the muon-induced fast neutron activity for the underground sites and we develop a depth-sensitivity relation to characterize the effect of such background in experiments searching for WIMP dark matter and neutrinoless double-beta decay. C1 Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA. RP Mei, DM (reprint author), Los Alamos Natl Lab, Div Phys, MS H803, Los Alamos, NM 87545 USA. NR 73 TC 140 Z9 141 U1 0 U2 8 PU AMERICAN 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 MAR PY 2006 VL 73 IS 5 AR 053004 DI 10.1103/PhysRevD.73.053004 PG 18 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800023 ER PT J AU Villa, S Abe, K Abe, K Adachi, I Aihara, H Asano, Y Aushev, T Bahinipati, S Bakich, AM Balagura, V Barberio, E Bay, A Bedny, I Belous, K Bitenc, U Bizjak, I Bondar, A Bozek, A Bracko, M Browder, TE Chao, Y Chen, A Chen, WT Cheon, BG Chistov, R Choi, Y Chuvikov, A Cole, S Dalseno, J Danilov, M Dash, M Drutskoy, A Eidelman, S Gabyshev, N Garmash, A Gershon, T Gokhroo, G Golob, B Haba, J Hara, T Hayasaka, K Hazumi, M Hinz, L Hokuue, T Hoshi, Y Hou, S Hou, WS Ikado, K Imoto, A Inami, K Itoh, R Iwasaki, M Iwasaki, Y Jacoby, C Kang, JH Kapusta, P Kawasaki, T Khan, HR Kichimi, H Kim, SK Kim, SM Kinoshita, K Korpar, S Krokovny, P Kulasiri, R Kuo, CC Kuzmin, A Kwon, YJ Leder, G Lesiak, T Lin, SW Liventsev, D Matsumoto, T Mitaroff, W Miyata, H Miyazaki, Y Mizuk, R Mohapatra, D Nakamura, I Nakano, E Nakao, M Natkaniec, Z Nishida, S Ogawa, S Ohshima, T Okabe, T Okuno, S Olsen, SL Ozaki, H Palka, H Park, CW Park, KS Pestotnik, R Piilonen, LE Sakai, Y Sato, N Satoyama, N Schietinger, T Schneider, O Schwanda, C Seidl, R Senyo, K Sevior, ME Shapkin, M Shibuya, H Somov, A Soni, N Stamen, R Stanic, S Staric, M Sumiyoshi, T Tamai, K Tamura, N Tanaka, M Taylor, GN Teramoto, Y Tian, XC Trabelsi, K Tsukamoto, T Uehara, S Uglov, T Ueno, K Uno, S Urquijo, P Varner, G Varvell, KE Wang, CC Wang, CH Watanabe, Y Wicht, J Won, E Xie, QL Yabsley, BD Yamaguchi, A Yamauchi, M Ying, J Zhang, LM Zhang, ZP Zurcher, D AF Villa, S Abe, K Abe, K Adachi, I Aihara, H Asano, Y Aushev, T Bahinipati, S Bakich, AM Balagura, V Barberio, E Bay, A Bedny, I Belous, K Bitenc, U Bizjak, I Bondar, A Bozek, A Bracko, M Browder, TE Chao, Y Chen, A Chen, WT Cheon, BG Chistov, R Choi, Y Chuvikov, A Cole, S Dalseno, J Danilov, M Dash, M Drutskoy, A Eidelman, S Gabyshev, N Garmash, A Gershon, T Gokhroo, G Golob, B Haba, J Hara, T Hayasaka, K Hazumi, M Hinz, L Hokuue, T Hoshi, Y Hou, S Hou, WS Ikado, K Imoto, A Inami, K Itoh, R Iwasaki, M Iwasaki, Y Jacoby, C Kang, JH Kapusta, P Kawasaki, T Khan, HR Kichimi, H Kim, SK Kim, SM Kinoshita, K Korpar, S Krokovny, P Kulasiri, R Kuo, CC Kuzmin, A Kwon, YJ Leder, G Lesiak, T Lin, SW Liventsev, D Matsumoto, T Mitaroff, W Miyata, H Miyazaki, Y Mizuk, R Mohapatra, D Nakamura, I Nakano, E Nakao, M Natkaniec, Z Nishida, S Ogawa, S Ohshima, T Okabe, T Okuno, S Olsen, SL Ozaki, H Palka, H Park, CW Park, KS Pestotnik, R Piilonen, LE Sakai, Y Sato, N Satoyama, N Schietinger, T Schneider, O Schwanda, C Seidl, R Senyo, K Sevior, ME Shapkin, M Shibuya, H Somov, A Soni, N Stamen, R Stanic, S Staric, M Sumiyoshi, T Tamai, K Tamura, N Tanaka, M Taylor, GN Teramoto, Y Tian, XC Trabelsi, K Tsukamoto, T Uehara, S Uglov, T Ueno, K Uno, S Urquijo, P Varner, G Varvell, KE Wang, CC Wang, CH Watanabe, Y Wicht, J Won, E Xie, QL Yabsley, BD Yamaguchi, A Yamauchi, M Ying, J Zhang, LM Zhang, ZP Zurcher, D TI Search for the decay B-0 ->gamma gamma SO PHYSICAL REVIEW D LA English DT Article ID BELLE DETECTOR; MODEL AB The rare decay B-0 ->gamma gamma is searched for in 104 fb(-1) of data, corresponding to 111x10(6)B (B) over bar pairs, collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No evidence for the signal is found, and an upper limit of 6.2x10(-7) at 90% confidence level is set for the corresponding branching fraction. C1 Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol Lausanne, CH-1015 Lausanne, Switzerland. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Chonnam Natl Univ, Kwangju, South Korea. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Hawaii, Honolulu, HI 96822 USA. Natl Lab High Energy Phys, KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan. Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China. Inst High Energy Phys, Vienna, Austria. Inst High Energy Phys, Protvino, Russia. Inst Theoret & Expt Phys, Moscow 117259, Russia. Jozef Stefan Inst, Ljubljana, Slovenia. Kanagawa Univ, Yokohama, Kanagawa, Japan. Korea Univ, Seoul 136701, South Korea. Univ Ljubljana, Ljubljana, Slovenia. Univ Maribor, SLO-2000 Maribor, Slovenia. Univ Melbourne, Parkville, Vic 3052, Australia. Nagoya Univ, Nagoya, Aichi, Japan. Nara Womens Univ, Nara 630, Japan. Natl Cent Univ, Chungli 32054, Taiwan. Natl United Univ, Miaoli, Taiwan. Natl Taiwan Univ, Dept Phys, Taipei, Taiwan. H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland. Niigata Univ, Niigata, Japan. Nova Gorica Polytech, Nova Gorica, Slovenia. Osaka City Univ, Osaka 558, Japan. Osaka Univ, Osaka, Japan. Panjab Univ, Chandigarh 160014, India. Peking Univ, Beijing 100871, Peoples R China. Princeton Univ, Princeton, NJ 08544 USA. RIKEN, BNL, Res Ctr, Upton, NY 11973 USA. Univ Sci & Technol China, Hefei 230026, Peoples R China. Seoul Natl Univ, Seoul, South Korea. Shinshu Univ, Nagano, Japan. Sungkyunkwan Univ, Suwon, South Korea. Univ Sydney, Sydney, NSW 2006, Australia. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. Toho Univ, Funabashi, Chiba 274, Japan. Tohoku Gakuin Univ, Tagajo, Miyagi, Japan. Tohoku Univ, Sendai, Miyagi 980, Japan. Univ Tokyo, Dept Phys, Tokyo, Japan. Tokyo Inst Technol, Tokyo 152, Japan. Tokyo Metropolitan Univ, Tokyo 158, Japan. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA. Yonsei Univ, Seoul 120749, South Korea. RP Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol Lausanne, CH-1015 Lausanne, Switzerland. RI Abe, Kazuo/F-6576-2010; Aihara, Hiroaki/F-3854-2010; Tian, Xinchun/L-2060-2013; Kim, Sun Kee/G-2042-2015; Uglov, Timofey/B-2406-2014; Danilov, Mikhail/C-5380-2014; Mizuk, Roman/B-3751-2014; Krokovny, Pavel/G-4421-2016; Chistov, Ruslan/B-4893-2014; Drutskoy, Alexey/C-8833-2016 OI Trabelsi, Karim/0000-0001-6567-3036; Aihara, Hiroaki/0000-0002-1907-5964; Tian, Xinchun/0000-0002-6246-0470; Kim, Sun Kee/0000-0002-0013-0775; Uglov, Timofey/0000-0002-4944-1830; Danilov, Mikhail/0000-0001-9227-5164; Krokovny, Pavel/0000-0002-1236-4667; Chistov, Ruslan/0000-0003-1439-8390; Drutskoy, Alexey/0000-0003-4524-0422 NR 18 TC 4 Z9 4 U1 0 U2 0 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 MAR PY 2006 VL 73 IS 5 AR 051107 DI 10.1103/PhysRevD.73.051107 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 028DB UT WOS:000236465800007 ER PT J AU Amodei, D Keers, H Vasco, D Johnson, L AF Amodei, D Keers, H Vasco, D Johnson, L TI Computation of uniform wave forms using complex rays SO PHYSICAL REVIEW E LA English DT Article ID CUSPOID CANONICAL INTEGRALS; INHOMOGENEOUS-MEDIA; SYNTHETIC SEISMOGRAMS; NUMERICAL EVALUATION; DIFFRACTION; DERIVATIVES; CAUSTICS; VICINITY AB Complex rays and polynomial phase functions are used to numerically solve the Helmholtz equation in a realistic two-dimensional smoothly varying heterogeneous velocity model with multiple adjacent cusp caustics. Together these two methods allow the determination of global uniformly asymptotic solutions in the presence of arbitrarily many caustics. Two algorithms are introduced to this end: a two-point ray tracing algorithm for complex rays and a perturbation method for constructing polynomial phase functions. Model representation in complex space is performed via discrete cosine transform analysis. Geometrical and uniformly asymptotic solutions are computed for a linear layer test model as well as a velocity model from Yucca Mountain. C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Schlumberger Cambridge Res Ltd, Cambridge CB3 0EL, England. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Amodei, D (reprint author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA. EM damodei@stanford.edu RI Vasco, Donald/I-3167-2016 OI Vasco, Donald/0000-0003-1210-8628 NR 45 TC 9 Z9 9 U1 0 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAR PY 2006 VL 73 IS 3 AR 036704 DI 10.1103/PhysRevE.73.036704 PN 2 PG 14 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 028DS UT WOS:000236467700113 PM 16605695 ER PT J AU Barash, L Shchur, LN AF Barash, L Shchur, LN TI Periodic orbits of the ensemble of Sinai-Arnold cat maps and pseudorandom number generation SO PHYSICAL REVIEW E LA English DT Article ID MONTE-CARLO SIMULATIONS; ERRORS; MODEL AB We propose methods for constructing high-quality pseudorandom number generators (RNGs) based on an ensemble of hyperbolic automorphisms of the unit two-dimensional torus (Sinai-Arnold map or cat map) while keeping a part of the information hidden. The single cat map provides the random properties expected from a good RNG and is hence an appropriate building block for an RNG, although unnecessary correlations are always present in practice. We show that introducing hidden variables and introducing rotation in the RNG output, accompanied with the proper initialization, dramatically suppress these correlations. We analyze the mechanisms of the single-cat-map correlations analytically and show how to diminish them. We generalize the Percival-Vivaldi theory in the case of the ensemble of maps, find the period of the proposed RNG analytically, and also analyze its properties. We present efficient practical realizations for the RNGs and check our predictions numerically. We also test our RNGs using the known stringent batteries of statistical tests and find that the statistical properties of our best generators are not worse than those of other best modern generators. C1 Landau Inst Theoret Phys, Chernogolovka 142432, Russia. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Barash, L (reprint author), Landau Inst Theoret Phys, Chernogolovka 142432, Russia. EM barash@itp.ac.ru; lev@landau.ac.ru RI Barash, Lev/F-2812-2017 OI Barash, Lev/0000-0002-2298-785X NR 47 TC 10 Z9 10 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAR PY 2006 VL 73 IS 3 AR 036701 DI 10.1103/PhysRevE.73.036701 PN 2 PG 15 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 028DS UT WOS:000236467700110 PM 16605692 ER PT J AU Ben-Naim, E Krapivsky, PL AF Ben-Naim, E Krapivsky, PL TI Alignment of rods and partition of integers SO PHYSICAL REVIEW E LA English DT Article ID SELF-ORGANIZATION; MICROTUBULES; SYNCHRONIZATION; KURAMOTO; MOTORS; MODEL AB We study dynamical ordering of rods. In this process, rod alignment via pairwise interactions competes with diffusive wiggling. Under strong diffusion, the system is disordered, but at weak diffusion, the system is ordered. We present an exact steady-state solution for the nonlinear and nonlocal kinetic theory of this process. We find the Fourier transform as a function of the order parameter, and show that Fourier modes decay exponentially with the wave number. We also obtain the order parameter in terms of the diffusion constant. This solution is obtained using iterated partitions of the integer numbers. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Boston Univ, Dept Phys, Boston, MA 02215 USA. Boston Univ, Ctr Mol Cybernet, Boston, MA 02215 USA. RP Ben-Naim, E (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA. RI Ben-Naim, Eli/C-7542-2009; Krapivsky, Pavel/A-4612-2014 OI Ben-Naim, Eli/0000-0002-2444-7304; NR 31 TC 13 Z9 13 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAR PY 2006 VL 73 IS 3 AR 031109 DI 10.1103/PhysRevE.73.031109 PN 1 PG 6 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 028DR UT WOS:000236467600014 PM 16605502 ER PT J AU Cooley, JH Antonsen, TM Milchberg, HM Fan, J Margolin, L Pyatnitskii, L AF Cooley, JH Antonsen, TM Milchberg, HM Fan, J Margolin, L Pyatnitskii, L TI Parametric instability in the formation of plasma waveguides SO PHYSICAL REVIEW E LA English DT Article ID INTENSITY LASER-PULSES; PERIODIC STRUCTURES; CHANNELS; SPARK AB Plasma waveguides generated by focusing a moderate intensity laser into neutral gas with an axicon lens can be unstable to the generation of axial modulations in the channel parameters. A model is proposed in which the modulations are due to the nonlinear coupling between the axicon field and a scattered mode in the evolving channel. Good agreement is found with experimental measurements of these modulations. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA. Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA. Russian Acad Sci, Inst High Temp, Moscow, Russia. RP Cooley, JH (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Antonsen, Thomas/D-8791-2017 OI Antonsen, Thomas/0000-0002-2362-2430 NR 21 TC 8 Z9 8 U1 0 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAR PY 2006 VL 73 IS 3 AR 036404 DI 10.1103/PhysRevE.73.036404 PN 2 PG 11 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 028DS UT WOS:000236467700083 PM 16605665 ER PT J AU Gomez-Gardenes, J Malomed, BA Floria, LM Bishop, AR AF Gomez-Gardenes, J Malomed, BA Floria, LM Bishop, AR TI Solitons in the Salerno model with competing nonlinearities SO PHYSICAL REVIEW E LA English DT Article ID SCHRODINGER-EQUATION; DISCRETE BREATHERS; LOCALIZED MODES; STABILITY; LATTICES; DYNAMICS; LIGHT AB We consider a lattice equation (Salerno model) combining onsite self-focusing and intersite self-defocusing cubic terms, which may describe a Bose-Einstein condensate of dipolar atoms trapped in a strong periodic potential. In the continuum approximation, the model gives rise to solitons in a finite band of frequencies, with sechlike solitons near one edge, and an exact peakon solution at the other. A similar family of solitons is found in the discrete system, including a peakon; beyond the peakon, the family continues in the form of cuspons. Stability of the lattice solitons is explored through computation of eigenvalues for small perturbations, and by direct simulations. A small part of the family is unstable (in that case, the discrete solitons transform into robust pulsonic excitations); both peakons and cuspons are stable. The Vakhitov-Kolokolov criterion precisely explains the stability of regular solitons and peakons, but does not apply to cuspons. In-phase and out-of-phase bound states of solitons are also constructed. They exchange their stability at a point where the bound solitons are peakons. Mobile solitons, composed of a moving core and background, exist up to a critical value of the strength of the self-defocusing intersite nonlinearity. Colliding solitons always merge into a single pulse. C1 Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain. Univ Zaragoza, Inst Biocomputac & Fis Sistemas Complejos, E-50009 Zaragoza, Spain. Univ Zaragoza, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain. Fac Engn, Sch Elect Engn, Dept Interdisciplinary Studies, IL-69978 Tel Aviv, Israel. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Gomez-Gardenes, J (reprint author), Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain. RI Gomez-Gardenes, Jesus/A-3226-2009; Floria, Luis Mario/L-7261-2014; Gomez-Gardenes, Jesus/B-5818-2009 OI Floria, Luis Mario/0000-0002-1406-8810; Gomez-Gardenes, Jesus/0000-0001-5204-1937 NR 26 TC 23 Z9 23 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 EI 1550-2376 J9 PHYS REV E JI Phys. Rev. E PD MAR PY 2006 VL 73 IS 3 AR 036608 DI 10.1103/PhysRevE.73.036608 PN 2 PG 8 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 028DS UT WOS:000236467700096 PM 16605678 ER PT J AU Luo, F Zhong, JX Yang, YF Zhou, JZ AF Luo, F Zhong, JX Yang, YF Zhou, JZ TI Application of random matrix theory to microarray data for discovering functional gene modules SO PHYSICAL REVIEW E LA English DT Article ID EXPRESSION PATTERNS; BIOLOGY; CELLS AB We show that spectral fluctuation of coexpression correlation matrices of yeast gene microarray profiles follows the description of the Gaussian orthogonal ensemble (GOE) of the random matrix theory (RMT) and removal of small values of the correlation coefficients results in a transition from the GOE statistics to the Poisson statistics of the RMT. This transition is directly related to the structural change of the gene expression network from a global network to a network of isolated modules. C1 Xiangtan Univ, Dept Phys, Xiangtan 411105, Peoples R China. Clemson Univ, Dept Comp Sci, Clemson, SC 29634 USA. Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Univ Oklahoma, Dept Bot & Microbiol, Norman, OK 73019 USA. RP Zhong, JX (reprint author), Xiangtan Univ, Dept Phys, Xiangtan 411105, Peoples R China. EM zhongjn@ornl.gov; zhouj@ornl.gov RI Yang, Yunfeng/H-9853-2013 OI Yang, Yunfeng/0000-0001-8274-6196 NR 19 TC 31 Z9 32 U1 2 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAR PY 2006 VL 73 IS 3 AR 031924 DI 10.1103/PhysRevE.73.031924 PN 1 PG 5 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 028DR UT WOS:000236467600087 PM 16605575 ER PT J AU Nukala, S Nukala, PKVV Simunovic, S Guess, F AF Nukala, S Nukala, PKVV Simunovic, S Guess, F TI Crack-cluster distributions in the random fuse model SO PHYSICAL REVIEW E LA English DT Article ID DISORDERED-SYSTEMS; FRACTURE; BREAKDOWN; STRENGTH; NETWORKS; FAILURE AB Using large-scale numerical simulations and extensive sampling, we analyze the scaling properties of the crack-cluster distribution and the largest crack-cluster distribution at the peak load. The simulations are performed using both two-dimensional and three-dimensional random fuse models. The numerical results indicate that in contrast with the randomly diluted networks (percolation disorder), the crack-cluster distribution in the random fuse model at the peak load follows neither a power law nor an exponential distribution. The largest crack-cluster distribution at the peak load follows a lognormal distribution, and this is discussed in the context of whether there exists a relationship between the largest crack-cluster size distribution at peak load and the fracture strength distribution. Contrary to popular belief, we find that the fracture strength and the largest crack-cluster size at the peak load are uncorrelated. Indeed, quite often, the final spanning crack is formed not due to the propagation of the largest crack at the peak load, but instead due to coalescence of smaller cracks. C1 Univ Tennessee, Dept Ind & Informat Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Stat Operat & Management Sci, Knoxville, TN 37996 USA. RP Univ Tennessee, Dept Ind & Informat Engn, Knoxville, TN 37996 USA. NR 23 TC 4 Z9 4 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0045 EI 2470-0053 J9 PHYS REV E JI Phys. Rev. E PD MAR PY 2006 VL 73 IS 3 AR 036109 DI 10.1103/PhysRevE.73.036109 PN 2 PG 6 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 028DS UT WOS:000236467700018 PM 16605600 ER PT J AU Reinhard, PG Stevenson, PD Almehed, D Maruhn, JA Strayer, MR AF Reinhard, PG Stevenson, PD Almehed, D Maruhn, JA Strayer, MR TI Role of boundary conditions in dynamic studies of nuclear giant resonances and collisions SO PHYSICAL REVIEW E LA English DT Article ID METAL-CLUSTERS; CONTINUUM; DECAY; RPA AB Absorbing boundary conditions are often employed in time-dependent mean-field calculations to cope with the problem of emitted particles which would otherwise return back onto the system and falsify the dynamical evolution. We scrutinize two widely used methods, imaginary potentials and gradual attenuation by a mask function. To that end, we consider breathing oscillations of a O-16 nucleus computed on a radial one-dimensional grid in coordinate space. The most critical test case is the computation of resonance spectra in the (linear) domain of small amplitude motion. Absorbing bounds turn out to provide a reliable alternative to fully fledged continuum random phase approximation (RPA) calculations, although rather large absorbing bounds are required to simulate reliably well continuum conditions. We also investigate the computation of observables in the nonlinear domain. This regime turns out to be less demanding. Smaller absorbing margin suffice to achieve the wanted absorption effect. C1 Univ Erlangen Nurnberg, Inst Theoret Phys 2, D-91058 Erlangen, Germany. Oak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA. Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England. Univ Frankfurt, Inst Theoret Phys, D-60325 Frankfurt, Germany. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Reinhard, PG (reprint author), Univ Erlangen Nurnberg, Inst Theoret Phys 2, Staudtstr 7, D-91058 Erlangen, Germany. RI Stevenson, Paul/B-9016-2012 OI Stevenson, Paul/0000-0003-2645-2569 NR 35 TC 63 Z9 63 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAR PY 2006 VL 73 IS 3 AR 036709 DI 10.1103/PhysRevE.73.036709 PN 2 PG 11 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 028DS UT WOS:000236467700118 PM 16605700 ER PT J AU Schneider, BI Collins, LA Hu, SX AF Schneider, BI Collins, LA Hu, SX TI Parallel solver for the time-dependent linear and nonlinear Schrodinger equation SO PHYSICAL REVIEW E LA English DT Article ID EINSTEIN CONDENSATION DYNAMICS; GROSS-PITAEVSKII EQUATION; EXPONENTIAL OPERATORS; STATISTICAL PHYSICS; NUMERICAL-SOLUTION; QUANTUM-MECHANICS; GROUND-STATE; IONIZATION; ALGORITHM; MOLECULES AB A solution of the time-dependent Schrodinger equation is required in a variety of problems in physics and chemistry. These include atoms and molecules in time-dependent electromagnetic fields, time-dependent approaches to atomic collision problems, and describing the behavior of materials subjected to internal and external forces. We describe an approach in which the finite-element discrete variable representation (FEDVR) is combined with the real-space product (RSP) algorithm to generate an efficient and highly accurate method for the solution of the time-dependent linear and nonlinear Schrodinger equation. The FEDVR provides a highly accurate spatial representation using a minimum number of grid points (N) while the RSP algorithm propagates the wave function in O(N) operations per time step. Parallelization of the method is transparent and is implemented here by distributing one or two spatial dimensions across the available processors, within the message-passing-interface scheme. The complete formalism and a number of three-dimensional examples are given; its high accuracy and efficacy are illustrated by a comparison with the usual finite-difference method. C1 Natl Sci Fdn, Div Phys, Arlington, VA 22230 USA. Natl Inst Stand & Technol, Electron & Opt Phys Div, Gaithersburg, MD 20899 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Schneider, BI (reprint author), Natl Sci Fdn, Div Phys, 4201 Wilson Blvd, Arlington, VA 22230 USA. EM bschneid@nsf.gov; lac@lanl.gov; suxing@lanl.gov RI Hu, Suxing/A-1265-2007 OI Hu, Suxing/0000-0003-2465-3818 NR 44 TC 73 Z9 73 U1 1 U2 11 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 EI 1550-2376 J9 PHYS REV E JI Phys. Rev. E PD MAR PY 2006 VL 73 IS 3 AR 036708 DI 10.1103/PhysRevE.73.036708 PN 2 PG 11 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 028DS UT WOS:000236467700117 PM 16605699 ER PT J AU Tang, YF Shen, YF Yang, J Liu, XH Zi, J Hu, XH AF Tang, YF Shen, YF Yang, J Liu, XH Zi, J Hu, XH TI Omnidirectional total reflection for liquid surface waves propagating over a bottom with one-dimensional periodic undulations SO PHYSICAL REVIEW E LA English DT Article ID FREQUENCY-RANGE; WATER WAVES; LOCALIZATION; RESONANCE AB We study theoretically the propagation of liquid surface waves over a bottom with one-dimensional (1D) periodic undulations. We find a general criterion for omnidirectional total reflection in such a system. Numerical simulations based on a transfer matrix method demonstrate unambiguously the existence of omnidirectional total reflection for liquid surface waves propagating over a bottom with 1D periodic undulations. C1 Fudan Univ, Surface Phys Lab, Shanghai 200433, Peoples R China. Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Tang, YF (reprint author), Fudan Univ, Surface Phys Lab, Shanghai 200433, Peoples R China. EM liuxh@fudan.edu.cn; jzi@fudan.edu.cn RI Hu, Xinhua/A-5930-2010; Zi, Jian/B-5102-2009 OI Hu, Xinhua/0000-0003-3153-7612; NR 30 TC 11 Z9 11 U1 2 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAR PY 2006 VL 73 IS 3 AR 035302 DI 10.1103/PhysRevE.73.035302 PN 2 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 028DS UT WOS:000236467700009 PM 16605591 ER PT J AU Warshavsky, VB Song, XY AF Warshavsky, VB Song, XY TI Fundamental-measure density functional theory study of the crystal-melt interface of the hard sphere system SO PHYSICAL REVIEW E LA English DT Article ID ANISOTROPIC FREE-ENERGY; SOLID-LIQUID INTERFACE; CLASSICAL FLUIDS; SIMULATION; METALS AB Two versions of the fundamental measure density functionals together with a new interfacial density profile parametrization were used to study the hard-sphere crystal-melt interface in the framework of the fundamental measure density functional theory. The equilibrium interfacial density profiles and interfacial free energies were found as a result of minimization of grand canonical potential of system with respect to parameters of density profile. We found that the average interfacial free energy is about 0.78, which is in reasonable agreement with simulation results. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. RP Warshavsky, VB (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. NR 38 TC 20 Z9 20 U1 0 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD MAR PY 2006 VL 73 IS 3 AR 031110 DI 10.1103/PhysRevE.73.031110 PN 1 PG 6 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 028DR UT WOS:000236467600015 PM 16605503 ER PT J AU Berg, JS AF Berg, JS TI Minimizing longitudinal distortion in a nearly isochronous linear nonscaling fixed-field alternating gradient accelerator SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID ELECTRON MODEL AB Linear nonscaling FFAGs (fixed-field alternating gradient accelerators) are machines that use linear magnets to achieve an extremely large energy acceptance (generally a factor of 2 or more). This paper examines the longitudinal dynamics in such a machine, focusing on the longitudinal acceptance, the phase space area that is transmitted without excessive distortion. The paper shows how to compute the distortion in two ways: computing the emittance growth, and computing the distortion of an initial ellipse from an elliptical shape. The paper will describe a model for the longitudinal dynamics in a linear nonscaling FFAG, show how to compute the longitudinal distortion in such a machine using a Dragt-Finn factorization, examine the accuracy of the calculation, and describe how longitudinal acceptance can interact with other performance criteria for an FFAG. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Berg, JS (reprint author), Brookhaven Natl Lab, Bldg 901A,POB 5000, Upton, NY 11973 USA. EM jsberg@bnl.gov RI Berg, Joseph/E-8371-2014 OI Berg, Joseph/0000-0002-5955-6973 NR 21 TC 9 Z9 9 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD MAR PY 2006 VL 9 IS 3 AR 034001 DI 10.1103/PhysRevSTAB.9.034001 PG 11 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 034IJ UT WOS:000236922200010 ER PT J AU Dorf, M Davidson, RC Startsev, EA AF Dorf, M Davidson, RC Startsev, EA TI Transverse compression of an intense ion beam propagating through an alternating-gradient quadrupole lattice SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID SIMULATION; CHANNEL AB The transverse compression and dynamics of an intense beam propagating through an alternating-gradient quadrupole lattice, plays an important role in many accelerator physics applications. Typically, the compression can be achieved by means of increasing the focusing strength of the lattice along the beam propagation direction. However, beam propagation through the lattice transition region inevitably leads to a certain level of beam mismatch and halo formation. In this work we present a detailed analysis of these phenomena using the envelope equations in the smooth-focusing approximation, which describe the average effects of an alternating-gradient lattice, and full particle-in-cell numerical simulations using the WARP code, taking into account the effects of the alternating-gradient quadrupole field. Simulations are presented for both space-charge-dominated beams, and beams with a moderate space-charge strength. C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Dorf, M (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 20 TC 13 Z9 13 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD MAR PY 2006 VL 9 IS 3 AR 034202 DI 10.1103/PhysRevSTAB.9.034202 PG 12 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 034IJ UT WOS:000236922200013 ER PT J AU Furman, MA Chaplin, VH AF Furman, MA Chaplin, VH TI Update on electron-cloud power deposition for the Large Hadron Collider arc dipoles SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID VACUUM-SYSTEM; BEAM; INSTABILITY; LHC AB We revisit the estimation of the power deposited by the electron cloud (EC) in the arc dipoles of the Large Haydron Collider, by means of simulations. We adopt, as simulation input, a set of electron-related parameters closely resembling those used in recent simulations at CERN [ F. Zimmermann, in LTC Meeting No. 40, CERN, 2005]. We explore values for the bunch population N-b in the range 0.4 x 10(11) <= N-b <= 1.6 x 10(11), peak secondary electron yield delta(max) in the range 1.0 <= delta(max) <= 2.0, and bunch spacing t(b) either 25 or 75 ns. For t(b) = 25 ns we find that the EC average power deposition per unit length of beam pipe, d (P) over bar /dz, will exceed the available cooling capacity, which we take to be 1: 7 W/m at nominal N-b [F. Zimmermann, in LHC MAC Meeting No. 17, 2005], if delta(max) exceeds similar to 1.3, but d (P) over bar /dz will be comfortably within the cooling capacity if delta(max) <= 1.2. For t(b) = 75 ns d (P) over bar /dz exceeds the cooling capacity only when delta(max) > 2 and N-b > 1.5 x 10(11) taken in combination. The rediffused component of the secondary electron emission spectrum plays a significant role: if we artificially suppress this component while keeping delta(max) fixed, d (P) over bar /dz is roughly cut in half for most values of N-b explored here, and in this case we find good agreement with earlier results [ F. Zimmermann, in LTC Meeting No. 40, CERN, 2005], as expected. We provide a fairly detailed explanation of the mechanism responsible for such a relatively large effect. We assess the sensitivity of our results to numerical simulation parameters, and to physical parameters such as the photoelectric yield, bunch train length, etc. Owing to the lack of detailed knowledge of the electron emission spectrum, the sensitivity of d (P) over bar /dz to the rediffused component appears to be the most significant source of uncertainty in our results. Nevertheless, taking our results as a whole, the condition delta(max) <= 1.2 seems to be a conservative requirement for the cooling capacity not to be exceeded. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Beam Phys, Berkeley, CA 94720 USA. Swarthmore Coll, Swarthmore, PA 19081 USA. RP Furman, MA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Beam Phys, Bldg 71R0259,1 Cyclotron Rd, Berkeley, CA 94720 USA. EM mafurman@lbl.gov; vchapli1@swarthmore.edu NR 74 TC 12 Z9 12 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD MAR PY 2006 VL 9 IS 3 AR 034403 DI 10.1103/PhysRevSTAB.9.034403 PG 14 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 034IJ UT WOS:000236922200016 ER PT J AU Li, XP Enokizono, H Okamoto, H Yuri, Y Sessler, AM Wei, J AF Li, XP Enokizono, H Okamoto, H Yuri, Y Sessler, AM Wei, J TI Phonon spectrum and the maintenance condition of crystalline beams SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID STORAGE-RING; ION-BEAMS; COOLER; TRAP AB It has been shown that the maintenance condition for a crystalline beam requires that there be no resonance between the crystal's phonon frequencies, and the frequency associated with a beam moving through a lattice of N-sp periods. This resonance can be avoided provided that the phonon frequencies all are below half the lattice frequency. Here, we study in detail the phonon modes of several crystalline beams. The analytic results obtained in the smooth approximation are compared with numerical evaluations employing Fourier transform of the molecular dynamics (MD) modes. The stability of various crystalline structures is examined through systematic MD simulations based on several different lattice designs. The maintenance condition, when combined with either the simple analytic theory or the numerical evaluation of phonon modes, exhibits excellent agreement with the MD calculations of crystal stability. A confirmed maintenance condition, derived from linear-resonance criteria, is that the lattice frequency must not equal the sum of any two phonon frequencies. C1 Skyworks Solut Inc, Newbury Pk, CA 91320 USA. Hiroshima Univ, Grad Sch Adv Sci Matter, Dept Quantum Matter, Higashihiroshima 7398530, Japan. Japan Atom Energy Agcy, Takasaki Adv Radiat Res Inst, Takasaki, Gumma 3701292, Japan. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Li, XP (reprint author), Skyworks Solut Inc, 2427 W Hillcrest Dr, Newbury Pk, CA 91320 USA. EM jwei@bnl.gov NR 21 TC 6 Z9 6 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD MAR PY 2006 VL 9 IS 3 AR 034201 DI 10.1103/PhysRevSTAB.9.034201 PG 10 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 034IJ UT WOS:000236922200012 ER PT J AU Nash, B Wu, JH Chao, AW AF Nash, B Wu, JH Chao, AW TI Equilibrium beam distribution in an electron storage ring near linear synchrobetatron coupling resonances SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID SYNCHROTRON-RADIATION INTEGRALS AB Linear dynamics in a storage ring can be described by the one-turn map matrix. In the case of a resonance where two of the eigenvalues of this matrix are degenerate, a coupling perturbation causes a mixing of the uncoupled eigenvectors. A perturbation formalism is developed to find eigenvalues and eigenvectors of the one-turn map near such a linear resonance. Damping and diffusion due to synchrotron radiation can be obtained by integrating their effects over one turn, and the coupled eigenvectors can be used to find the coupled damping and diffusion coefficients. Expressions for the coupled equilibrium emittances and beam distribution moments are then derived. In addition to the conventional instabilities at the sum, integer, and half-integer resonances, it is found that the coupling can cause an instability through antidamping near a sum resonance even when the symplectic dynamics are stable. As one application of this formalism, the case of linear synchrobetatron coupling is analyzed where the coupling is caused by dispersion in the rf cavity, or by a crab cavity. Explicit closed-form expressions for the sum/difference resonances are given along with the integer/half-integer resonances. The integer and half-integer resonances caused by coupling require particular care. We find an example of this with the case of a crab cavity for the integer resonance of the synchrotron tune. Whether or not there is an instability is determined by the value of the horizontal betatron tune, a unique feature of these coupling-caused integer or half-integer resonances. Finally, the coupled damping and diffusion coefficients along with the equilibrium invariants and projected emittances are plotted as a function of the betatron and synchrotron tunes for an example storage ring based on PEP-II. C1 SLAC, Menlo Pk, CA 94025 USA. RP Nash, B (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM bnash@slac.stanford.edu NR 23 TC 2 Z9 2 U1 2 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD MAR PY 2006 VL 9 IS 3 AR 032801 DI 10.1103/PhysRevSTAB.9.032801 PG 43 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 034IJ UT WOS:000236922200009 ER PT J AU Piot, P Sun, YE Kim, KJ AF Piot, P Sun, YE Kim, KJ TI Photoinjector generation of a flat electron beam with transverse emittance ratio of 100 SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB The generation of a flat electron beam directly from a photoinjector is an attractive alternative to the electron damping ring as envisioned for linear colliders. It also has potential applications to light sources such as the generation of ultrashort x-ray pulses or Smith-Purcell free electron lasers. In this paper, we report on the experimental generation of a flat beam with a measured transverse emittance ratio of 100 +/- 20 for a bunch charge of similar to 0.5 nC; the smaller measured normalized root-mean-square emittance is similar to 0.4 mu m and is limited by the resolution of our experimental setup. The experimental data, obtained at the Fermilab/NICADD Photoinjector Laboratory, are compared with numerical simulations and the expected scaling laws. C1 No Illinois Univ, De Kalb, IL 60115 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Chicago, Chicago, IL 60637 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Piot, P (reprint author), No Illinois Univ, De Kalb, IL 60115 USA. EM piot@nicadd.niu.edu; yinesun@uchicago.edu NR 34 TC 44 Z9 44 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD MAR PY 2006 VL 9 IS 3 AR 031001 DI 10.1103/PhysRevSTAB.9.031001 PG 7 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 034IJ UT WOS:000236922200004 ER PT J AU Yang, BX Friedsam, H AF Yang, BX Friedsam, H TI High-resolution accelerator alignment using x-ray optics SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID SYSTEM; DESIGN AB We propose a novel alignment technique utilizing the x-ray beam of an undulator in conjunction with pinholes and position-sensitive detectors for positioning components of the accelerator, undulator, and beam line in an x-ray free-electron laser. Two retractable pinholes at each end of the undulator define a stable and reproducible x-ray beam axis (XBA). Targets are precisely positioned on the XBA using a pinhole camera technique. Position-sensitive detectors responding to both x-ray and electron beams enable direct transfer of the position setting from the XBA to the electron beam. This system has the potential to deliver superior alignment accuracy (1-3 mu m) for target pinholes in the transverse directions over a long distance (200 m or longer). It can be used to define the beam axis of the electron-beam-based alignment, enabling high reproducibility of the latter. This x-ray-based concept should complement the electron-beam-based alignment and the existing survey methods to raise the alignment accuracy of long accelerators to an unprecedented level. Further improvement of the transverse accuracy using x-ray zone plates will be discussed. We also propose a concurrent measurement scheme during accelerator operation to allow real-time feedback for transverse position correction. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Yang, BX (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. NR 29 TC 0 Z9 0 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD MAR PY 2006 VL 9 IS 3 AR 030701 DI 10.1103/PhysRevSTAB.9.030701 PG 17 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 034IJ UT WOS:000236922200001 ER PT J AU Kunz, M Lager, GA Burgi, HB Fernandez-Diaz, MT AF Kunz, M Lager, GA Burgi, HB Fernandez-Diaz, MT TI High-temperature single-crystal neutron diffraction study of natural chondrodite SO PHYSICS AND CHEMISTRY OF MINERALS LA English DT Article DE chondrodite; hydrous magnesium silicates; high temperature; neutron diffraction; hydrogen bonds; anisotropic displacement parameters ID RAMAN-SPECTRA; BOND LENGTHS; PHASE-E; O-H; PRESSURES; MINERALS; MOTION AB The H-atom environment in a Tilly Foster chondrodite was analyzed using single-crystal neutron-diffraction data collected at 500, 700 and 900 K and previously published low temperature data collected at 10, 100 and 300 K on the same crystal (Mg4.64Fe0.28Mn0.014 Ti-0.023(Si1.01O4)(2)F-1.16(OH)(0.84); Friedrich et al. in Am Mineral 86: 981 - 989, 2001). The full mean square displacement matrix Sigma of the O - H pair was determined from the temperature dependence of the anisotropic displacement parameters, enabling a proper correction of the O - H bond for thermal vibration without assumptions about the correlation of O and H movements. The results show that the perpendicular O - H motions in chondrodite are intermediate between the riding and the independent motion models. The corrected O - H bond lengths do not change with temperature whereas the corrected H center dot center dot center dot F distances show an increase of similar to 0.02 angstrom with temperature, as do the Mg - O distances. This result shows that spectroscopic observations on the strength of the covalent O - H bond cannot be interpreted unambiguously in terms of a corresponding behaviour of the associated H center dot center dot center dot O/F hydrogen bond. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. Univ Louisville, Dept Geog & Geosci, Louisville, KY 40292 USA. Univ Bern, Lab Chem & Mineral Kristallog, CH-3012 Bern, Switzerland. Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France. RP Kunz, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, 1 cyclotron Rd,MS 4R 0230, Berkeley, CA 94720 USA. EM mkunz@lbl.gov RI Kunz, Martin/K-4491-2012; Fernandez-Diaz, Maria Teresa/D-7373-2014 OI Kunz, Martin/0000-0001-9769-9900; NR 27 TC 4 Z9 5 U1 2 U2 3 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0342-1791 J9 PHYS CHEM MINER JI Phys. Chem. Miner. PD MAR PY 2006 VL 33 IS 1 BP 17 EP 27 DI 10.1007/s00269-005-0035-0 PG 11 WC Materials Science, Multidisciplinary; Mineralogy SC Materials Science; Mineralogy GA 017TW UT WOS:000235717200003 ER PT J AU Knoll, DA Chacon, L AF Knoll, DA Chacon, L TI Coalescence of magnetic islands, sloshing, and the pressure problem SO PHYSICS OF PLASMAS LA English DT Article ID RECONNECTION; INSTABILITY; SATURATION; ENERGY AB The coalescence of magnetic islands in the high Lundquist number regime is studied. Within the resistive magnetohydrodynamics model, the coalescence rate is known to stall (sloshing) in the limit of high Lundquist number. Previously, this stalling has been associated with the presence of a secondary tearing mode. Here it is shown that this stalling results from high magnetic pressure gradients, which result from thin current sheets at high Lundquist number. This phenomenon is frequently referred to as the "pressure problem" in flux pile-up reconnection studies. Sensitivity of the dynamic solution is presented, over a wide range of resistivities. (c) 2006 American Institute of Physics. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Knoll, DA (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. OI Chacon, Luis/0000-0002-4566-8763 NR 17 TC 24 Z9 24 U1 0 U2 3 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 J9 PHYS PLASMAS JI Phys. Plasmas PD MAR PY 2006 VL 13 IS 3 AR 032307 DI 10.1063/1.2173515 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 028CH UT WOS:000236463000018 ER PT J AU McDonald, JW Suter, LJ Landen, OL Foster, JM Celeste, JR Holder, JP Dewald, EL Schneider, MB Hinkel, DE Kauffman, RL Atherton, LJ Bonanno, RE Dixit, SN Eder, DC Haynam, CA Kalantar, DH Koniges, AE Lee, FD MacGowan, BJ Manes, KR Munro, DH Murray, JR Shaw, MJ Stevenson, RM Parham, TG Van Wonterghem, BM Wallace, RJ Wegner, PJ Whitman, PK Young, BK Hammel, BA Moses, EI AF McDonald, JW Suter, LJ Landen, OL Foster, JM Celeste, JR Holder, JP Dewald, EL Schneider, MB Hinkel, DE Kauffman, RL Atherton, LJ Bonanno, RE Dixit, SN Eder, DC Haynam, CA Kalantar, DH Koniges, AE Lee, FD MacGowan, BJ Manes, KR Munro, DH Murray, JR Shaw, MJ Stevenson, RM Parham, TG Van Wonterghem, BM Wallace, RJ Wegner, PJ Whitman, PK Young, BK Hammel, BA Moses, EI TI Hard x-ray and hot electron environment in vacuum hohlraums at the National Ignition Facility SO PHYSICS OF PLASMAS LA English DT Article ID INERTIAL-CONFINEMENT FUSION; LASER-HEATED HOHLRAUMS; DISK TARGETS; RADIATION; LIGHT; BREMSSTRAHLUNG; EFFICIENT; CAVITIES; PLASMAS; DRIVE AB Time resolved hard x-ray images (hv>9 keV) and time integrated hard x-ray spectra (hv=18-150 keV) from vacuum hohlraums irradiated with four 351 nm wavelength National Ignition Facility [J. A. Paisner, E. M. Campbell, and W. J. Hogan, Fusion Technol. 26, 755 (1994)] laser beams are presented as a function of hohlraum size, laser power, and duration. The hard x-ray images and spectra provide insight into the time evolution of the hohlraum plasma filling and the production of hot electrons. The fraction of laser energy detected as hot electrons (F-hot) shows a correlation with laser intensity and with an empirical hohlraum plasma filling model. In addition, the significance of Au K-alpha emission and Au K-shell reabsorption observed in some of the bremsstrahlung dominated spectra is discussed. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. RI Whitman, Pamela/B-2336-2013 NR 27 TC 20 Z9 22 U1 1 U2 5 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 1070-664X EI 1089-7674 J9 PHYS PLASMAS JI Phys. Plasmas PD MAR PY 2006 VL 13 IS 3 AR 032703 DI 10.1063/1.2186927 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 028CH UT WOS:000236463000031 ER PT J AU Ryutov, DD Furno, I Intrator, TP Abbate, S Madziwa-Nussinov, T AF Ryutov, DD Furno, I Intrator, TP Abbate, S Madziwa-Nussinov, T TI Phenomenological theory of the kink instability in a slender plasma column SO PHYSICS OF PLASMAS LA English DT Article ID MAGNETIC RECONNECTION; STABILITY; MODES; WALLS AB In this paper we are concerned with the kink instability of a current-carrying plasma column whose radius a is much smaller than its length L. In the limit a < L, one can consider the column as a thin filament whose kinking can be adequately described simply by a two dimensional 2D displacement vector, xi(x)=xi(x)(z,t); xi(y)=xi(y)(z,t). Details of the internal structure of the column such as the radial distribution of the current, density, and axial flow can be lumped into some phenomenological parameters. This approach is particularly efficient in the problems with nonideal (sheath) boundary conditions (BC) at the end electrodes, with the finite plasma resistivity, and with a substantial axial flow. With the sheath BC imposed at one of the endplates, we find instability in the domain well below the classical Kruskal-Shafranov limit. The presence of an axial flow causes the onset of rotation of the kink and strong axial "skewness" of the eigenfunction, with the perturbation amplitude increasing in the flow direction. The limitations of the phenomenological approach are analyzed and are related to the steepness with which the plasma resistivity increases at the plasma boundary with vacuum. (c) 2006 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Ryutov, DD (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM ryutov1@llnl.gov NR 19 TC 39 Z9 39 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 J9 PHYS PLASMAS JI Phys. Plasmas PD MAR PY 2006 VL 13 IS 3 AR 032105 DI 10.1063/1.2180667 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 028CH UT WOS:000236463000008 ER PT J AU Schroeder, CB Esarey, E Shadwick, BA Leemans, WP AF Schroeder, CB Esarey, E Shadwick, BA Leemans, WP TI Trapping, dark current, and wave breaking in nonlinear plasma waves SO PHYSICS OF PLASMAS LA English DT Article ID MODULATED LASER WAKEFIELDS; WAKE-FIELD GENERATION; ELECTRON ACCELERATION; PULSES; OSCILLATIONS; INJECTION; CHANNELS; BEAMS; AMPLITUDE AB The trapping of thermal electrons in a nonlinear electron plasma wave of arbitrary phase velocity is investigated. Using a model based on single-particle dynamics, various thermal effects are calculated, such as the evolution of the plasma temperature. Assuming a broad (one-dimensional) plasma wave driver, the threshold plasma wave amplitude for electron trapping is calculated, thereby determining the fraction of trapped plasma electrons and the expected dark current in a plasma-based accelerator. It is shown that the trapping threshold is increased within the region of the laser pulse. The laser intensity required to excite plasma waves of sufficient amplitude to trap background electrons is determined. The hydrodynamic wave breaking field amplitude is recovered from particle trapping considerations. Implications for experimental and numerical studies of plasma accelerators are discussed. C1 Lawrence Livermore Natl Lab, Berkeley, CA 94720 USA. RP Lawrence Livermore Natl Lab, Berkeley, CA 94720 USA. OI Schroeder, Carl/0000-0002-9610-0166 NR 44 TC 38 Z9 38 U1 1 U2 8 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 1070-664X EI 1089-7674 J9 PHYS PLASMAS JI Phys. Plasmas PD MAR PY 2006 VL 13 IS 3 AR 033103 DI 10.1063/1.2173960 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 028CH UT WOS:000236463000036 ER PT J AU Shen, Q Hao, Q Gruner, SM AF Shen, Q Hao, Q Gruner, SM TI Macromolecular phasing SO PHYSICS TODAY LA English DT Article ID X-RAY-DIFFRACTION; SYNCHROTRON-RADIATION; ANOMALOUS SCATTERING; CRYSTALLOGRAPHY; RESOLUTION; INFORMATION; MICROSCOPY; RETRIEVAL; CRAMBIN C1 CHESS, Ithaca, NY USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Northwestern Univ, Evanston, IL USA. RP Shen, Q (reprint author), CHESS, Ithaca, NY USA. RI Hao, Quan/C-4304-2009; Gruner, Sol/G-2924-2010 OI Gruner, Sol/0000-0002-1171-4426 NR 35 TC 4 Z9 4 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD MAR PY 2006 VL 59 IS 3 BP 46 EP 52 DI 10.1063/1.2195315 PG 7 WC Physics, Multidisciplinary SC Physics GA 018QX UT WOS:000235781000018 ER PT J AU Crease, RP AF Crease, RP TI Critical Point F = ma SO PHYSICS WORLD LA English DT Editorial Material C1 SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Crease, RP (reprint author), SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA. EM rcrease@notes.cc.sunysb.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8585 J9 PHYS WORLD JI Phys. World PD MAR PY 2006 VL 19 IS 3 BP 17 EP 17 PG 1 WC Physics, Multidisciplinary SC Physics GA 020JJ UT WOS:000235904500025 ER PT J AU Ryutov, DD Remington, BA AF Ryutov, DD Remington, BA TI Similarity laws for collisionless interaction of superstrong electromagnetic fields with a plasma SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Letter ID HIGH-ENERGY-DENSITY; LASERS; ASTROPHYSICS; ELECTRONS; PROGRESS; EXTREME; PHYSICS; PULSES AB Several similarity laws for the collisionless interaction of ultra-intense electromagnetic fields with a plasma of an arbitrary initial shape are presented. Both ultra-relativistic and non-relativistic cases are covered. The ion motion is included. A relation to the S-similarity described in Pukhov et al (2004 Plasma Phys. Control. Fusion 46 B 179) and Gordienko and Pukhov (2005 Phys. Plasmas 12 043109) is established. A brief discussion of possible ways of experimental verification of scaling laws is presented. The results can be of interest for experiments and numerical simulations in the areas of ion acceleration, harmonic generation, magnetic field generation and Coulomb explosion of clusters. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Ryutov, DD (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 20 TC 5 Z9 5 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD MAR PY 2006 VL 48 IS 3 BP L23 EP L31 DI 10.1088/0741-3335/48/3/L01 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 028VX UT WOS:000236518000001 ER PT J AU Yandell, M Mungall, CJ Smith, C Prochnik, S Kaminker, J Hartzell, G Lewis, S Rubin, GM AF Yandell, Mark Mungall, Chris J. Smith, Chris Prochnik, Simon Kaminker, Joshua Hartzell, George Lewis, Suzanna Rubin, Gerald M. TI Large-scale trends in the evolution of gene structures within 11 animal genomes SO PLOS COMPUTATIONAL BIOLOGY LA English DT Article ID ACID SUBSTITUTION MATRICES; SPLICEOSOMAL INTRONS; SEQUENCE; DROSOPHILA; DIVERGENCE; CONSERVATION; RESOLUTION; ALIGNMENT; ORIGINS; FLYBASE AB We have used the annotations of six animal genomes (Homo sapiens, Mus musculus, Ciona intestinalis, Drosophila melanogaster, Anopheles gambiae, and Caenorhabditis elegans) together with the sequences of five unannotated Drosophila genomes to survey changes in protein sequence and gene structure over a variety of timescales-from the less than 5 million years since the divergence of D. simulans and D. melanogaster to the more than 500 million years that have elapsed since the Cambrian explosion. To do so, we have developed a new open-source software library called CGL (for "Comparative Genomics Library"). Our results demonstrate that change in intron-exon structure is gradual, clock-like, and largely independent of coding-sequence evolution. This means that genome annotations can be used in new ways to inform, corroborate, and test conclusions drawn from comparative genomics analyses that are based upon protein and nucleotide sequence similarities. C1 Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA. Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Dept Genome Sci, Berkeley, CA USA. RP Yandell, M (reprint author), Univ Utah, Dept Human Genet, Eccles Inst Human Genet, 201 Presidents Circle, Salt Lake City, UT 84112 USA. EM myandell@genetics.utah.edu OI Lewis, Suzanna/0000-0002-8343-612X; Rubin, Gerald/0000-0001-8762-8703 FU NHGRI NIH HHS [HG00739, HG00750, P41 HG000739, U41 HG000739] NR 56 TC 53 Z9 54 U1 0 U2 2 PU PUBLIC LIBRARY SCIENCE PI SAN FRANCISCO PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA SN 1553-734X EI 1553-7358 J9 PLOS COMPUT BIOL JI PLoS Comput. Biol. PD MAR PY 2006 VL 2 IS 3 BP 113 EP 125 AR e15 DI 10.1371/journal.pcbi.0020015 PG 13 WC Biochemical Research Methods; Mathematical & Computational Biology SC Biochemistry & Molecular Biology; Mathematical & Computational Biology GA 070AV UT WOS:000239493600001 PM 16518452 ER PT J AU Ball, DY AF Ball, DY TI The Russian military: Power and policy SO POLITICAL SCIENCE QUARTERLY LA English DT Book Review C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Ball, DY (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU ACAD POLITICAL SCIENCE PI NEW YORK PA 475 RIVERSIDE DRIVE, SUITE 1274, NEW YORK, NY 10115-1274 USA SN 0032-3195 J9 POLIT SCI QUART JI Polit. Sci. Q. PD SPR PY 2006 VL 121 IS 1 BP 181 EP 182 PG 2 WC Political Science SC Government & Law GA 030KK UT WOS:000236633200034 ER PT J AU Chinn, SC Wilson, TS Maxwell, RS AF Chinn, SC Wilson, TS Maxwell, RS TI Analysis of radiation induced degradation in FPC-461 fluoropolymers by variable temperature multinuclear NMR SO POLYMER DEGRADATION AND STABILITY LA English DT Article; Proceedings Paper CT 3rd International Conference on Polymer Modification, Degradation and Stabilisation CY AUG, 2004 CL Lyon, FRANCE DE FPC-461; fluoropolymer; variable temperature NMR; degradation ID POLY(VINYL CHLORIDE); MAGNETIC-RESONANCE; F-19 NMR; CHEMISTRY; POLY(CHLOROTRIFLUOROETHYLENE); SPECTROSCOPY; POWDER AB Solid state nuclear magnetic resonance techniques have been used to investigate aging mechanisms in a vinyl chloride:chlorotrifluoroethylene copolymer, FPC-461, due to exposure to gamma-radiation. Solid state H-1 MAS NMR spectra revealed structural changes in the polymer upon irradiation under both air and nitrogen atmospheres. Considerable degradation is seen with H-1 NMR in the vinyl chloride region of the polymer, particularly in the samples irradiated in air. F-19 MAS NMR was used to investigate speciation in the chlorotrifluoroethylene blocks, though negligible changes were seen. H-1 and F-19 NMR at elevated temperature revealed increased segmental mobility and decreased structural heterogeneity within the polymer, yielding significant resolution enhancement over room temperature solid state detection. The effects of multi-site exchange are manifested in both the H-1 and F-19 NMR spectra Lis a line broadening and change in peak position as a function of temperature. (c) 2005 Elsevier Ltd. All rights reserved. C1 Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. Lawrence Livermore Natl Lab, Phys & Adv Technol Directorate, Livermore, CA 94550 USA. RP Maxwell, RS (reprint author), Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, 7000 E Ave,L-231, Livermore, CA 94550 USA. EM maxwell7@llnl.gov RI Chinn, Sarah/E-1195-2011 NR 19 TC 2 Z9 2 U1 0 U2 2 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 MAR PY 2006 VL 91 IS 3 BP 541 EP 547 DI 10.1016/j.polymdegradstab.2005.01.058 PG 7 WC Polymer Science SC Polymer Science GA 996GQ UT WOS:000234162800019 ER PT J AU Patel, M Swain, AC Cunningham, JL Maxwell, RS Chinn, SC AF Patel, M Swain, AC Cunningham, JL Maxwell, RS Chinn, SC TI The stability of poly (m-carborane-siloxane) elastomers exposed to heat and gamma radiation SO POLYMER DEGRADATION AND STABILITY LA English DT Article; Proceedings Paper CT 3rd International Conference on Polymer Modification, Degradation and Stabilisation CY AUG, 2004 CL Lyon, FRANCE DE NMR; poly(m-carboranyl-siloxane); degradation; chain dynamics ID POLY(M-CARBORANE-SILOXANE) ELASTOMERS; NMR-SPECTROSCOPY; DENSITY; RUBBER AB Poly(m-carboranyl-siloxatie) elastomers containing a mixture of di-methyl- and methylphenyl-silyl units were synthesised using the ferric chloride catalysed condensation reaction between di-chloro-diorganosilane and bis(di-methylmethoxysilyl)-m-carborane. These elastomeric materials were originally developed to have greater stability to extreme thermal environments and retain tailorable physical and chemical properties relative to comparable non-carborane containing elastomers. Prepared samples were aged either by heating in air at elevated temperatures or by gamma irradiation from a Co-60 source. Multinuclear (H-1, C-13 and B-11) solid and solution state nuclear magnetic resonance (NMR) was used to assess degradation. This included measurements of segmental chain dynamics using a solid-echo pulse sequence reflecting changes in crosslink density and assessing changes to the carborane fragment by B-11 and H-1 Magic Angle Spinning (MAS) methods. Thermogravimetric measurements were also performed to assess thermal stability. Gamma radiation (to a dose of 1 MGy) was found to induce only a small degree of elastomer hardening as evidenced by a reduction in segmental chain dynamics. The carborane cage however, remained intact at these dose levels. Thermal degradation was observed to lead to oxidative crosslinking, the degree of which is dependent on temperature. At temperatures below 350 degrees C, only small changes in segmental dynamics were observed commensurate with only minor weight loss at this temperature. At temperatures above 350 degrees C, the degradation of the elastomer increased dramatically with decreased segmental dynamics and presumed partial oxidation of the carborane cage. The integrity of the in-carborane cage and the segmental dynamics were found to be significantly reduced at temperatures above 580 degrees C, in line with the known cage rearrangement temperature for icosahedral carboranes. Crown Copyright (c) 2005 Published by Elsevier Ltd. All rights reserved. C1 Atom Weapons Estab, Reading RG7 4PR, Berks, England. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Patel, M (reprint author), Atom Weapons Estab, Reading RG7 4PR, Berks, England. EM mogon.patel@awe.co.uk RI Chinn, Sarah/E-1195-2011 NR 16 TC 16 Z9 17 U1 0 U2 15 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 MAR PY 2006 VL 91 IS 3 BP 548 EP 554 DI 10.1016/j.polymdegradstab.2005.03.026 PG 7 WC Polymer Science SC Polymer Science GA 996GQ UT WOS:000234162800020 ER PT J AU Chinn, S DeTeresa, S Sawvel, A Shields, A Balazs, B Maxwell, RS AF Chinn, S DeTeresa, S Sawvel, A Shields, A Balazs, B Maxwell, RS TI Chemical origins of permanent set in a peroxide cured filled silicone elastomer - tensile and H-1 NMR analysis SO POLYMER DEGRADATION AND STABILITY LA English DT Article; Proceedings Paper CT 3rd International Conference on Polymer Modification, Degradation and Stabilisation CY AUG, 2004 CL Lyon, FRANCE DE siloxanes; radiation; multiple quantum NMR; permanent set; unilateral NMR ID RESIDUAL DIPOLAR COUPLINGS; NUCLEAR-MAGNETIC-RESONANCE; DOUBLE-QUANTUM NMR; CROSS-LINKED ELASTOMERS; SEGMENTAL DYNAMICS; MOLECULAR-DYNAMICS; POLYMER MELTS; ORDER; RUBBER; DENSITY AB The aging of a commercial filled siloxane polymeric composite in states of high stress and Co-60 gamma-radiation exposure has been studied. DC-745 is it commercially available silicone elastomer consisting of dimethyl, methyl-phenyl, and vinyl-methyl siloxane monomers crosslinked with a peroxide vinyl specific curing agent. It is filled with similar to 30 wt.% Mixture of high and low Surface area silicas. This filled material is shown lobe subject to permanent set if exposed to radiation while under tensile stress. Tensile modulus measurements show that the material becomes inarginally softer with combined radiation exposure and tensile strain as compared to material exposed to radiation without tensile strain. In addition, the segmental dynamics as measured by both uniaxial NMR relaxometry and Multiple Quantum NMR methods indicate that the material undergoes radiatively-induced crosslinking in the absence of tensile strain. In the presence of tensile strain, relaxometry and MQ NMR studies show of polymer chains associated with the filler surface. Solvent swell strain dependent change in the dynamic order parameter and in the number ing measurements indicated no dependence oil network crosslink density on strain ratio. Variable tau CPMG echo experiments indicate that a fraction of the polymer chains diffuses through areas of strong magnetic field gradients both at the filler-polyrner interface and adjacent to micro-voids within the network. The population of the polymer chains influenced by the field gradients wits observed to be dependent on the cumulative dose and degree of tensile strain applied during exposure. The relative change in crosslink density from the NMR and solvent swelling data deviates from that predicted from the Tobolsky model, particularly at higher doses. The likely reasons for this deviation are changes in the filler-polymer interface, increasing deviation from Gaussian chain statistics, and/or the formation of increased numbers of elastically ineffective network chains. (c) 2005 Elsevier Ltd. All rights reserved. C1 Ctr Natl Secur Applicat Magnet Resonance, Chem & Mat Sci Directorate, Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Maxwell, RS (reprint author), 7000 E Ave L-231, Livermore, CA 94551 USA. EM maxwell7@llnl.gov RI Chinn, Sarah/E-1195-2011 NR 42 TC 21 Z9 21 U1 1 U2 21 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 MAR PY 2006 VL 91 IS 3 BP 555 EP 564 DI 10.1016/j.polymdegradstab.2005.05.035 PG 10 WC Polymer Science SC Polymer Science GA 996GQ UT WOS:000234162800021 ER PT J AU Toby, B Kaduk, J Huang, TC AF Toby, B Kaduk, J Huang, TC TI New section on crystallography education SO POWDER DIFFRACTION LA English DT Editorial Material C1 Argonne Natl Lab, Argonne, IL 60439 USA. Innovene USA, Crystallog Serv Lab, Naperville, IL USA. RP Toby, B (reprint author), Argonne Natl Lab, Argonne, IL 60439 USA. RI Toby, Brian/F-3176-2013 OI Toby, Brian/0000-0001-8793-8285 NR 0 TC 8 Z9 8 U1 0 U2 5 PU J C P D S-INT CENTRE DIFFRACTION DATA PI NEWTOWN SQ PA 12 CAMPUS BLVD, NEWTOWN SQ, PA 19073-3273 USA SN 0885-7156 J9 POWDER DIFFR JI Powder Diffr. PD MAR PY 2006 VL 21 IS 1 BP 1 EP 2 DI 10.1154/1.2178852 PG 2 WC Materials Science, Characterization & Testing SC Materials Science GA 025DT UT WOS:000236246200001 ER PT J AU Toby, BH AF Toby, BH TI R factors in Rietveld analysis: How good is good enough? SO POWDER DIFFRACTION LA English DT Article ID POWDER DIFFRACTION; REFINEMENT AB The definitions for important Rietveld error indices are defined and discussed. It is shown that while smaller error index values indicate a better fit of a model to the data, wrong models with poor quality data may exhibit smaller values error index values than some superb models with very high quality data. (c) 2006 International Centre for Diffraction Data. C1 Argonne Natl Lab, Adv Photon Source, XOR, BESSRC, Argonne, IL 60439 USA. RP Toby, BH (reprint author), Argonne Natl Lab, Adv Photon Source, XOR, BESSRC, Argonne, IL 60439 USA. RI Toby, Brian/F-3176-2013 OI Toby, Brian/0000-0001-8793-8285 NR 9 TC 215 Z9 217 U1 12 U2 81 PU J C P D S-INT CENTRE DIFFRACTION DATA PI NEWTOWN SQ PA 12 CAMPUS BLVD, NEWTOWN SQ, PA 19073-3273 USA SN 0885-7156 J9 POWDER DIFFR JI Powder Diffr. PD MAR PY 2006 VL 21 IS 1 BP 67 EP 70 DI 10.1154/1.2179804 PG 4 WC Materials Science, Characterization & Testing SC Materials Science GA 025DT UT WOS:000236246200015 ER PT J AU Cui, J Huang, Q Toby, BH AF Cui, J Huang, Q Toby, BH TI Magnetic structure refinement with neutron powder diffraction data using GSAS: A tutorial SO POWDER DIFFRACTION LA English DT Article DE magnetic structure; Rietveld analysis; power diffraction; crystallographic education; neutron scattering ID SYMMETRY; NUCLEAR AB Neutron diffraction provides a direct probe for the ordering of spins from unpaired electrons in materials with magnetic properties. The ordering of the spins can be modeled ill many cases by adding spin directions to standard crystallographic models. This requires, however, that crystallographic space groups be extended by addition of a "color" attribute to symmetry operations, which determines if the operation maintains or flips the direction of a magnetic spin. Rietveld analysis provides a mechanism for fitting magnetic structure models to powder diffraction data. The general structure and analysis system (GSAS) software suite is commonly used for Rietveld analysis and includes the ability to compute magnetic scattering. Different approaches are commonly used within GSAS to create models that include magnetism. Three equivalent but different approaches are presented to provide a tutorial on how magnetic scattering data may be modeled using differing treatment of symmetry. Also discussed is how magnetic models may be visualized. The cornmands used to run the GSAS programs are Summarized within, but are shown in great detail in Supplementary web pages. (c) 2006 International Centre for Diffraction Data. C1 GE Co, Global Res Ctr, Mat Anal & Chem Sci, Niskayuna, NY 12309 USA. Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Cui, J (reprint author), GE Co, Global Res Ctr, Mat Anal & Chem Sci, Niskayuna, NY 12309 USA. RI Toby, Brian/F-3176-2013 OI Toby, Brian/0000-0001-8793-8285 NR 24 TC 12 Z9 12 U1 1 U2 13 PU J C P D S-INT CENTRE DIFFRACTION DATA PI NEWTOWN SQ PA 12 CAMPUS BLVD, NEWTOWN SQ, PA 19073-3273 USA SN 0885-7156 J9 POWDER DIFFR JI Powder Diffr. PD MAR PY 2006 VL 21 IS 1 BP 71 EP 79 DI 10.1154/1.2179805 PG 9 WC Materials Science, Characterization & Testing SC Materials Science GA 025DT UT WOS:000236246200016 ER PT J AU Benyahia, S Syamlal, M O'Brien, TJ AF Benyahia, S Syamlal, M O'Brien, TJ TI Extension of Hill-Koch-Ladd drag correlation over all ranges of Reynolds number and solids volume fraction SO POWDER TECHNOLOGY LA English DT Article DE drag correlation; LBM simulation; gas/solids fluidization ID FLUIDIZED-BED; RANDOM ARRAYS; SPHERES; FLOWS; MONODISPERSE; SIMULATIONS; FORCES AB Hill et al. [R. J. Hill, D.L. Koch, J.C. Ladd, J. Fluid Mech. (2001), 448, pp. 213-241 and 243-278] proposed a set of drag correlations, based on data from Lattice-Boltzmann simulations. These correlations, while very accurate within the range of void fractions and Reynolds numbers used in the Lattice-Boltzmann simulations, do not cover the full range of void fractions and Reynolds numbers encountered in fluidized bed simulations. In this paper a drag correlation applicable to the full range of void fractions and Reynolds numbers is developed by blending the Hill-Koch-Ladd (HKL) drag correlation with known limiting forms of the gas-solids drag function such that the blended function is continuous with respect to Reynolds number and void fraction. This study also corrects a misinterpretation of the HKL drag correlation that was published in the literature, which makes the drag function discontinuous with respect to the Reynolds number. Two examples of gas/solids flows in a bubbling fluidized bed and a one-dimensional channel flow are used to illustrate differences between the proposed extension of HKL drag correlation and another form published in the literature. (c) 2005 Elsevier B.V. All rights reserved. C1 Fluent Inc, Morgantown, WV 26505 USA. US DOE, Morgantown, WV 26505 USA. RP Benyahia, S (reprint author), Fluent Inc, 3647 Collins Ferry Rd,Suite A, Morgantown, WV 26505 USA. EM sof@fluent.com; tobrie@netl.doe.gov NR 18 TC 69 Z9 70 U1 1 U2 22 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0032-5910 J9 POWDER TECHNOL JI Powder Technol. PD MAR 1 PY 2006 VL 162 IS 2 BP 166 EP 174 DI 10.1016/j.powtec.2005.12.014 PG 9 WC Engineering, Chemical SC Engineering GA 019TC UT WOS:000235858600011 ER PT J AU Kessler, C AF Kessler, C TI Post-Cold War effects on the non-proliferation regime SO PROBLEMS OF POST-COMMUNISM LA English DT Article AB As the world's only superpower, the United States may have unintentionally contributed to the resurfacing of nuclear proliferation as an international security problem since the end of the cold war. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Kessler, C (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. NR 19 TC 0 Z9 0 U1 0 U2 0 PU M E SHARPE INC PI ARMONK PA 80 BUSINESS PARK DR, ARMONK, NY 10504 USA SN 1075-8216 J9 PROBL POST-COMMUNISM JI Probl. Post-Communism PD MAR-APR PY 2006 VL 53 IS 2 BP 30 EP 38 DI 10.2753/PPC1075-8216530203 PG 9 WC Political Science SC Government & Law GA 025CM UT WOS:000236242900003 ER PT J AU Hahn, J Guillen, DP Anderson, T AF Hahn, J Guillen, DP Anderson, T TI Process control systems in the chemical industry: Safety vs. security SO PROCESS SAFETY PROGRESS LA English DT Article AB Traditionally, the primary focus of the chemical industry has been safety and productivity. However, recent threats to our nation's critical infrastructure have prompted a tightening of security measures across many different industry sectors. Reducing control system vulnerabilities against physical and cyber attack is necessary to ensure the safety, reliability, integrity, and availability of these systems. The U.S. Department Of Homeland Security has developed a strategy to secure these vulnerabilities. Crucial to this strategy is the Control Systems Security and Test Center (CSSTC) established to test and analyze control systems and their components. In addition, the CSSTC promotes a proactive, collaborative approach to increase industry's awareness of standards, products, and processes that can enhance the security of control systems. This paper outlines measures that can be taken to enhance the cybersecurity of process control systems in the chemical sector. (c) 2005 American Institute of Chemical Engineers Process Saf Prog 25: 40-43, 2006. C1 Idaho Natl Engn Lab, US CERT GSSTC, Idaho Falls, ID 83415 USA. RP Hahn, J (reprint author), Idaho Natl Engn Lab, US CERT GSSTC, Idaho Falls, ID 83415 USA. EM Jeffrey.Hahn@inl.gov RI Guillen, Donna/B-9681-2017 OI Guillen, Donna/0000-0002-7718-4608 NR 9 TC 2 Z9 2 U1 1 U2 11 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 1066-8527 J9 PROCESS SAF PROG JI Process Saf. Prog. PD MAR PY 2006 VL 25 IS 1 BP 40 EP 43 DI 10.1002/prs.10114 PG 4 WC Engineering, Chemical SC Engineering GA 014BW UT WOS:000235454700006 ER PT J AU Mason, JE Fthenakis, VM Hansen, T Kim, HC AF Mason, JE Fthenakis, VM Hansen, T Kim, HC TI Energy payback and life-cycle CO2 emissions of the BOS in an optimized 3.5 MW PV installation SO PROGRESS IN PHOTOVOLTAICS LA English DT Article DE PV plant; balance of system; life-cycle assessment; energy payback; greenhouse gas emissions ID SYSTEMS AB This study is a life-cycle analysis of the balance of system (BOS) components of the 3.5 MWP multi-crystalline PV installation at Tucson Electric Power's (TEP) Springerville, AZ field PV plant. TEP instituted all innovative PV installation program guided by design optimization and cost minimization. The advanced design of the PV structure incorporated the weight of the PV modules as all element of support design, thereby eliminating the need for concrete foundations. The estimate of the life-cycle energy requirements embodied in the BOS is 542 MJ/m(2), a 71% reduction front those of all older central plant; the corresponding life-cycle greenhouse gas emissions are 29 kg CO2 eq./m(2). From field measurements, the energy payback time (EPT) of the BOS is 0.21 years for the actual location of this plant, and 0.37 years for average US insolation/temperature conditions. This is a great improvement from the EPT of about 1.3 years, estimated for all older central plant. The total cost of the balance of system components was $940 US per kW(P) of installed PV, all other milestone in improvement. These results were verified with data from different databases and further tested with sensitivity- and data-uncertainty analyses. Copyright (c) 2005 John Wiley & Sons, Ltd. C1 Solar Energy Campaign, Farmingdale, NY 11735 USA. Brookhaven Natl Lab, PV EH&S Res Ctr, Upton, NY 11973 USA. Tucson Elect Power, Tucson, AZ 85702 USA. RP Mason, JE (reprint author), Solar Energy Campaign, 52 Columbia St, Farmingdale, NY 11735 USA. EM cjjmason5@earthlink.net NR 22 TC 77 Z9 77 U1 0 U2 16 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 1062-7995 J9 PROG PHOTOVOLTAICS JI Prog. Photovoltaics PD MAR PY 2006 VL 14 IS 2 BP 179 EP 190 DI 10.1002/pip.652 PG 12 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA 020IL UT WOS:000235902100008 ER PT J AU Silver, RB AF Silver, RB TI Enzymes necessary for production of leukotriene B4 are located on peri-nuclear endoplasmic reticulum, and are not intranuclear, at the time of the Leukotriene B4 evoked calcium signal required for cell division SO PROSTAGLANDINS & OTHER LIPID MEDIATORS LA English DT Meeting Abstract CT 9th International Conference Eicosanoids CY SEP 11-14, 2005 CL San Francisco, CA C1 Wayne State Univ, Dept Pharmacol, Sch Med, Detroit, MI 48201 USA. Wayne State Univ, Dept Physiol, Sch Med, Detroit, MI 48201 USA. Wayne State Univ, Dept Radiol, Sch Med, Detroit, MI 48201 USA. Wayne State Univ, Coll Engn, Dept Biomed Engn, Detroit, MI 48201 USA. Argonne Natl Lab, Decis & Informat Sci Div, Argonne, IL 60439 USA. Marine Biol Lab, Woods Hole, MA 02543 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 1098-8823 EI 2212-196X J9 PROSTAG OTH LIPID M JI Prostaglandins Other Lipid Mediat. PD MAR PY 2006 VL 79 IS 1-2 BP 164 EP 164 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 027NS UT WOS:000236422900089 ER PT J AU El-Shafey, A Tolic, N Young, MM Sale, K Smith, RD Kery, V AF El-Shafey, A Tolic, N Young, MM Sale, K Smith, RD Kery, V TI "Zero-length" cross-linking in solid state as an approach for analysis of protein-protein interactions SO PROTEIN SCIENCE LA English DT Article DE cross-linking; mass spectrometry; protein complex; protein folding; protein-protein interactions; protein structure; solid state; O-18 labeling ID GLUTATHIONE-S-TRANSFERASE; MASS-SPECTROMETRY; SCHISTOSOMA-JAPONICUM; LINKED PEPTIDES; COMPLEXES; IDENTIFICATION; PROTEOMICS; REAGENTS AB We have developed a new approach for the analysis of interacting interfaces in protein complexes and protein quaternary structure based on cross-linking in the solid state. Protein complexes are freeze-dried under vacuum, and cross-links are introduced in the solid phase by dehydrating the protein in a nonaqueous solvent creating peptide bonds between amino and carboxyl groups of the interacting peptides. Cross-lined proteins are digested into peptides with trypsin in both (H2O)-O-16 and (H2O)-O-18 and then readily distinguished in mass spectra by characteristic 8 atomic mass unit (amu) shifts reflecting incorporation of two O-18 atoms into each C terminus of proteolytic peptides. Computer analysis of mass spectrometry (MS) and MS/MS data is used to identify the cross-linked peptides. We demonstrated specificity and reproducibility of our method by cross-linking homo-oligomeric protein complexes of glutathione-S-transferase (GST) from Schistosoma japonicum alone or in a mixture of many other proteins. Identified cross-links were predominantly of amide origin, but six esters and thioesters were also found. The cross-linked peptides were validated against the GST monomer and dimer X-ray structures and by experimental (MS/MS) analyses. Some of the identified cross-links matched interacting peptides in the native 3D structure of GST, indicating that the structure of GST and its oligomeric complex remained primarily intact after freeze-drying. The pattern of oligomeric GST obtained in solid state was the same as that obtained in solution by Ru(II)BP32+ catalyzed, oxidative "zero-length" cross-linking, confirming that it is feasible to use our strategy for analyzing the molecular interfaces of interacting proteins or peptides. C1 Pacific NW Natl Lab, Richland, WA 99354 USA. Sandia Natl Labs, Livermore, CA 94550 USA. RP Kery, V (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999,K4-12, Richland, WA 99354 USA. EM Vladimir.Kery@pnl.gov RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 21 TC 18 Z9 19 U1 0 U2 3 PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT PI WOODBURY PA 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2924 USA SN 0961-8368 J9 PROTEIN SCI JI Protein Sci. PD MAR PY 2006 VL 15 IS 3 BP 429 EP 440 DI 10.1110/ps.051685706 PG 12 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 021AS UT WOS:000235955400005 PM 16501223 ER PT J AU Zhou, XC Zhou, JZ AF Zhou, XC Zhou, JZ TI Protein microarrays on hybrid polymeric thin films prepared by self-assembly of polyelectrolytes for multiple-protein immunoassays SO PROTEOMICS LA English DT Article DE immunodetection; protein immobilization; protein microarray; protein-protein interaction; surface coatings ID LIGAND INTERACTIONS; ARRAYS; IMMOBILIZATION; ANTIBODY; DNA; BINDING; MONOLAYERS; OLIGONUCLEOTIDE; MULTILAYERS; POLYSTYRENE AB We report here the development and characterization of protein microarrays fabricated on nanoengineered 3-D polyelectrolyte thin films (PET) deposited on glass slide by consecutive adsorption of polyelectrolytes via self-assembly technique. Antibodies or antigens were immobilized in the PET-coated glass slides by electrostatic adsorption and entrapment of porous structure of the 3-D polymer film and thus establishing a platform for parallel analysis. Both antigen and antibody microarrays were fabricated on the PET-coated slides, and direct and indirect immunoassays on protein microarrays for multiple-analyte detection were demonstrated. Microarrays produced on these PET-coated slides have consistent spot morphology and provide performance features needed for proteomic analysis. The protein microarrays on the PET films provide LOD as low as 6 pg/mL and dynamic ranges up to three orders of magnitude, which are wider than the protein microarrays fabricated on aldehyde and poly-L-lysine functionalized slides. The PET films constructed by self-assembly technique in aqueous solution is green chemistry based, cost-effective method to generate 3-D thin film coatings on glass surface, and the coated slide is well suited for immobilizing many types of biological molecules so that a wide variety of microarray formats can be developed on this type of slide. C1 Oak Ridge Natl Lab, Div Environm Sci, Genom Grp, Oak Ridge, TN 37831 USA. RP Zhou, JZ (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Genom Grp, POB 2008, Oak Ridge, TN 37831 USA. EM zhouj@ornl.gov NR 52 TC 30 Z9 32 U1 1 U2 12 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1615-9853 J9 PROTEOMICS JI Proteomics PD MAR PY 2006 VL 6 IS 5 BP 1415 EP 1426 DI 10.1002/pmic.200500138 PG 12 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 022TS UT WOS:000236079400005 PM 16404721 ER PT J AU Taylor-McCabe, KJ Wang, ZL Sauer, NN Marrone, BL AF Taylor-McCabe, KJ Wang, ZL Sauer, NN Marrone, BL TI Proteomic analysis of beryllium-induced genotoxicity in an Escherichia coli mutant model system SO PROTEOMICS LA English DT Article DE beryllium; comutagenesis; E. coli; mutagenesis ID INDUCED MUTAGENESIS; CRYSTAL-STRUCTURE; METAL; MUTAGENICITY; INVITRO; INVIVO; IONS; CARCINOGENS; INHIBITION; GLYCOLYSIS AB Beryllium is the second lightest metal, has a high melting point and high strength-to-weight ratio, and is chemically stable. These unique chemical characteristics make beryllium metal an ideal choice as a component material for a wide variety of applications in aerospace, defense, nuclear weapons, and industry. However, inhalation of beryllium dust or fumes induces significant health effects, including chronic beryllium disease and lung cancer. In this study, the mutagenicity of beryllium sulfate (BeSO4) and the comutagenicity of beryllium with a known mutagen 1-methyl-3-nitro-1-nitrosoguanidine (MNNG) were evaluated using a forward mutant detection system developed in Escherichia coli. In this system, BeSO4 was shown to be weakly mutagenic alone and significantly enhanced the mutagenicity of MNNG up to 3.5-fold over MNNG alone. Based on these results a proteomic study was conducted to identify the proteins regulated by BeSO4. Using the techniques of 2-DE and oMALDI-TOF MS, we successfully identified 32 proteins being differentially regulated by beryllium and/or MNNG in the E. coli test system. This is the first study to describe the proteins regulated by beryllium in vitro, and the results suggest several potential pathways for the focus of further research into the mechanisms underlying beryllium-induced genotoxicity. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Taylor-McCabe, KJ (reprint author), Los Alamos Natl Lab, Biosci Div, MS M888, Los Alamos, NM 87545 USA. EM kjmccab@lanl.gov NR 34 TC 6 Z9 7 U1 0 U2 0 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1615-9853 J9 PROTEOMICS JI Proteomics PD MAR PY 2006 VL 6 IS 5 BP 1663 EP 1675 DI 10.1002/pmic.200500190 PG 13 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 022TS UT WOS:000236079400026 PM 16447159 ER PT J AU Kiebel, GR Auberry, KJ Jaitly, N Clark, DA Monroe, ME Peterson, ES Tolic, N Anderson, GA Smith, RD AF Kiebel, GR Auberry, KJ Jaitly, N Clark, DA Monroe, ME Peterson, ES Tolic, N Anderson, GA Smith, RD TI PRISM: A data management system for high-throughput proteomics SO PROTEOMICS LA English DT Article DE database; high-throughput; LC-MS; software ID TANDEM MASS-SPECTROMETRY; SEARCHING SEQUENCE DATABASES; PROTEIN IDENTIFICATION; ACCURATE MASS; SPECTRAL DATA; TAG STRATEGY; PEPTIDE; ALGORITHM; MS AB Advanced proteomic research efforts involving areas such as systems biology or biomarker discovery are enabled by the use of high level informatics tools that allow the effective analysis of large quantities of differing types of data originating from various studies. Performing such analyses on a large scale is not feasible without a computational platform that performs data processing and management tasks. Such a platform must be able to provide high-throughput operation while having sufficient flexibility to accommodate evolving data analysis tools and methodologies. The Proteomics Research Information Storage and Management system (PRISM) provides a platform that serves the needs of the accurate mass and time tag approach developed at Pacific Northwest National Laboratory. PRISM incorporates a diverse set of analysis tools and allows a wide range of operations to be incorporated by using a state machine that is accessible to independent, distributed computational nodes. The system has scaled well as data volume has increased over several years, while allowing adaptability for incorporating new and improved data analysis tools for more effective proteomics research. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Smith, RD (reprint author), Pacific NW Natl Lab, POB 999,K8-98, Richland, WA 99352 USA. EM rds@pnl.gov RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 22 TC 50 Z9 51 U1 0 U2 2 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1615-9853 J9 PROTEOMICS JI Proteomics PD MAR PY 2006 VL 6 IS 6 BP 1783 EP 1790 DI 10.1002/pmic.200500500 PG 8 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 027MV UT WOS:000236420600011 PM 16470653 ER PT J AU Dornburg, CC McDaniel, MA AF Dornburg, CC McDaniel, MA TI The Cognitive Interview enhances long-term free recall of older adults SO PSYCHOLOGY AND AGING LA English DT Article DE standardized Cognitive Interview; older adults; text-based stimuli ID AGE-DIFFERENCES; EYEWITNESS MEMORY; FALSE RECALL; HYPERMNESIA; ACCOUNT; YOUNG AB The Cognitive Interview, a retrieval-based mnemonic technique, has received only limited attention in its application with older adults, and based on previous findings, its benefit to older adults is unclear. The authors found that the Cognitive Interview effectively increased older adults' recall relative to standard recall instructions at a 3-week delay. These findings demonstrate the benefit of a standardized (rather than the prototypically interactive) Cognitive Interview as applied to perceptually impoverished, text-based stimuli. Both theoretical and practical implications of the findings are discussed. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Washington Univ, Dept Psychol, St Louis, MO 63130 USA. RP Dornburg, CC (reprint author), Sandia Natl Labs, POB 5800,Mail Stop 0830, Albuquerque, NM 87185 USA. EM ccdornb@sandia.gov FU NIA NIH HHS [AG 17481, AG 02049] NR 22 TC 17 Z9 17 U1 1 U2 8 PU AMER PSYCHOLOGICAL ASSOC/EDUCATIONAL PUBLISHING FOUNDATION PI WASHINGTON PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA SN 0882-7974 J9 PSYCHOL AGING JI Psychol. Aging PD MAR PY 2006 VL 21 IS 1 BP 196 EP 200 DI 10.1037/0882-7974.21.1.196 PG 5 WC Gerontology; Psychology, Developmental SC Geriatrics & Gerontology; Psychology GA 031RR UT WOS:000236722200020 PM 16594805 ER PT J AU Dargavllle, TR Celina, M Clough, RL AF Dargavllle, TR Celina, M Clough, RL TI Evaluation of vinylidene fluoride polymers for use in space environments: Comparison of radiation sensitivities SO RADIATION PHYSICS AND CHEMISTRY LA English DT Article DE gamma irradiation; vinylidene fluoride; copolymers; performance assessment; materials selection; crosslinking ID POLY(VINYLIDENE FLUORIDE); CROSS-LINKING; ORGANIC-SOLVENTS; FLUOROPOLYMERS; IRRADIATION; POLYTETRAFLUOROETHYLENE; CRYSTALLINITY; NETWORKS; INCREASE; PFA AB Poly(vinylidene fluoride) and copolymers of vinylidene fluoride with hexafluoropropylene, trifluoroethylene and chlorotrifluoroethylene have been exposed to gamma irradiation in vacuum, up to doses of 1 MGy under identical conditions, to obtain a ranking of radiation sensitivities. Changes in the tensile properties, crystalline melting points, heats of fusion, gel contents and solvent uptake factors were used as the defining parameters. The initial degree of crystallinity and film processing had the greatest influence on relative radiation damage, although the cross-linked network features were almost identical in their solvent swelling characteristics, regardless of the comonomer composition or content. (c) 2005 Elsevier Ltd. All rights reserved. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Dargavllle, TR (reprint author), Sandia Natl Labs, 1515 Eubank Blvd SE,Bldg 897-1021, Albuquerque, NM 87185 USA. EM trdarga@sandia.gov OI Dargaville, Tim/0000-0003-4665-9508 NR 37 TC 13 Z9 13 U1 1 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0969-806X J9 RADIAT PHYS CHEM JI Radiat. Phys. Chem. PD MAR PY 2006 VL 75 IS 3 BP 432 EP 442 DI 10.1016/j.radphysche.2005.10.010 PG 11 WC Chemistry, Physical; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical SC Chemistry; Nuclear Science & Technology; Physics GA 019VC UT WOS:000235863800010 ER PT J AU Woloschak, G Paunesku, T Thurn, K Vogt, S Maser, J Lai, B AF Woloschak, G Paunesku, T Thurn, K Vogt, S Maser, J Lai, B TI Development of titanium dioxide-DNA nanocomposites for intracellular delivery and radiation-mediated DNA scission SO RADIOTHERAPY AND ONCOLOGY LA English DT Meeting Abstract CT 3rd International Conference on Translational Research and Pre-Clinical Strategies in Radiation Oncology CY MAR 12-15, 2006 CL Lugano, SWITZERLAND SP European Sch Oncol, European Soc Radiotherapeut Radiol & Oncol, European Org Res & Treatment Canc, Amer Med Assoc, EACCME C1 Northwestern Univ, Chicago, IL 60611 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RI Maser, Jorg/K-6817-2013; Paunesku, Tatjana/A-3488-2017; Woloschak, Gayle/A-3799-2017 OI Paunesku, Tatjana/0000-0001-8698-2938; Woloschak, Gayle/0000-0001-9209-8954 NR 0 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER IRELAND LTD PI CLARE PA ELSEVIER HOUSE, BROOKVALE PLAZA, EAST PARK SHANNON, CO, CLARE, 00000, IRELAND SN 0167-8140 J9 RADIOTHER ONCOL JI Radiother. Oncol. PD MAR PY 2006 VL 78 SU 1 MA 210 BP S73 EP S74 DI 10.1016/S0167-8140(06)80687-0 PG 2 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA 043KD UT WOS:000237599000191 ER PT J AU Helton, JC Johnson, JD Oberkampf, WL AF Helton, JC Johnson, JD Oberkampf, WL TI Probability of loss of assured safety in temperature dependent systems with multiple weak and strong links SO RELIABILITY ENGINEERING & SYSTEM SAFETY LA English DT Article DE aleatory uncertainty; competing risk; fire environment; high consequence system; probability of loss of assured safety; reliability; strong link; weak link ID HIGHLY DEPENDABLE SYSTEMS; RISK ANALYSIS; UNCERTAINTY; MODELS; ASSESSMENTS; SIMULATION AB Relationships to determine the probability that a weak link (WL)/strong link (SL) safety system will fail to function as intended in a fire environment are investigated. In the systems under study, failure of the WL system before failure of the SL system is intended to render the overall system inoperational and thus prevent the possible occurrence of accidents with potentially serious consequences. Formal developments of the probability that the WL system fails to deactivate the overall system before failure of the SL system (i.e. the probability of loss of assured safety, PLOAS) are presented for several WL/SL configurations: (i) one WL, one SL; (ii) multiple WLs, multiple SLs with failure of any SL before any WL constituting failure of the safety system; (iii) multiple WLs, multiple SLs with failure of all SLs before any WL constituting failure of the safety system; and (iv) multiple WLs, multiple SLs and multiple sublinks in each SL with failure of any sublink constituting failure of the associated SL and failure of all SLs before failure of any WL constituting failure of the safety system. The indicated probabilities derive from time-dependent temperatures in the WL/SL system and variability (i.e. aleatory uncertainty) in the temperatures at which the individual components of this system fail and are formally defined as multidimensional integrals. Numerical procedures based on quadrature (i.e. trapezoidal rule, Simpson's rule) and also on Monte Carlo techniques (i.e. simple random sampling, importance sampling) are described and illustrated for the evaluation of these integrals. (c) 2005 Elsevier Ltd. All rights reserved. C1 Sandia Natl Labs, Dept 6874, Albuquerque, NM 87185 USA. Arizona State Univ, Dept Math & Stat, Tempe, AZ 85287 USA. ProStat, Mesa, AZ 85204 USA. RP Helton, JC (reprint author), Sandia Natl Labs, Dept 6874, MS 0779, Albuquerque, NM 87185 USA. EM jchelto@sandia.gov NR 31 TC 8 Z9 8 U1 1 U2 3 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0951-8320 J9 RELIAB ENG SYST SAFE JI Reliab. Eng. Syst. Saf. PD MAR PY 2006 VL 91 IS 3 BP 320 EP 348 DI 10.1016/j.ress.2005.01.011 PG 29 WC Engineering, Industrial; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA 004ZD UT WOS:000234790400007 ER PT J AU Anantram, MP Leonard, F AF Anantram, MP Leonard, F TI Physics of carbon nanotube electronic devices SO REPORTS ON PROGRESS IN PHYSICS LA English DT Review ID CURRENT-CARRYING CAPACITY; FIELD-EFFECT TRANSISTORS; CURRENT SATURATION; QUANTUM CONDUCTANCE; WORK-FUNCTIONS; SINGLE; EMISSION; RESISTANCE; TRANSPORT; STATES AB Carbon nanotubes (CNTs) are amongst the most explored one-dimensional nanostructures and have attracted tremendous interest from fundamental science and technological perspectives. Albeit topologically simple, they exhibit a rich variety of intriguing electronic properties, such as metallic and semiconducting behaviour. Furthermore, these structures are atomically precise, meaning that each carbon atom is still three-fold coordinated without any dangling bonds. CNTs have been used in many laboratories to build prototype nanodevices. These devices include metallic wires, field-effect transistors, electromechanical sensors and displays. They potentially form the basis of future all-carbon electronics. This review deals with the building blocks of understanding the device physics of CNT-based nanodevices. There are many features that make CNTs different from traditional materials, including chirality-dependent electronic properties, the one-dimensional nature of electrostatic screening and the presence of several direct bandgaps. Understanding these novel properties and their impact on devices is crucial in the development and evolution of CNT applications. C1 NASA, Ames Res Ctr, Ctr Nanotechnol, Moffett Field, CA 94035 USA. Sandia Natl Labs, Nanoscale Sci & Technol Dept, Livermore, CA 94551 USA. RP NASA, Ames Res Ctr, Ctr Nanotechnol, Mail Stop 229-1, Moffett Field, CA 94035 USA. EM anant@arc.nasa.gov; fleonar@sandia.gov RI 李, 府中/H-4357-2011 NR 121 TC 312 Z9 317 U1 16 U2 129 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0034-4885 EI 1361-6633 J9 REP PROG PHYS JI Rep. Prog. Phys. PD MAR PY 2006 VL 69 IS 3 BP 507 EP 561 DI 10.1088/0034-4885/69/3/R01 PG 55 WC Physics, Multidisciplinary SC Physics GA 031IJ UT WOS:000236697700001 ER PT J AU Alton, GD Liu, Y Stracener, DW AF Alton, G. D. Liu, Y. Stracener, D. W. TI High-efficiency target ion sources for radioactive ion beam generation SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE ID ISOTOPE-SEPARATION ONLINE; COMPOUND MATERIALS; RIB GENERATION; FACILITY; SELECTION; MATRICES; RELEASE; SYSTEMS; DESIGN; NE-18 AB In this report, high-temperature ion sources are described, which have demonstrated the high ionization efficiency, species versatility, and operational reliability required at isotope-separator-online (ISOL) based radioactive ion beam facilities such as the Holifield Radioactive Ion Beam Facility (HRIBF). Specific attention is given to the ion optics, operational parameters, thermal transport properties, emittances, and ionization efficiencies of the HRIBF ion sources that have been carefully designed for safe handling in the high-level radiation fields incumbent at such facilities. Included in the article are descriptions and performance data for high-temperature, positive- (electron impact and surface ionization) and negative- (kinetic ejection and surface ionization) ion sources as well as low-temperature, batch-mode negative-ion sources, developed for processing long-lived isotopes that have been the principal contributors to recent successes held at the Holifield Radioactive Ion Beam Facility. (c) 2006 American Institute of Physics. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Alton, GD (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM gda@ornl.gov NR 32 TC 2 Z9 2 U1 0 U2 0 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03A711 DI 10.1063/1.2173968 PN 2 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200096 ER PT J AU Becker, R Herrmannsfeldt, WB AF Becker, R Herrmannsfeldt, WB TI Why pi and mrad? SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE AB Today it is generally accepted in the ion source and accelerator communities to communicate emittance data with units of pi mm mrad or pi cm mrad. The emittance of a beam with 2 cm diameter or width and an opening angle of 200 mrad then is written as E = 100 pi cm mrad. This example shows that pi has not been involved when calculating the half-axis' product which is the numerical definition for the emittance. Why should we add pi to the dimensions? We will explain that this convention is not at all a logical one and is confusing to all those who are entering the field as freshmen or just do not want to become experts by adjusting to strange rules. We therefore propose to skip the "pi" in the dimension and to add characters as sub- or superscripts to the variable E, which describe the specific kind of emittance formulation used, e.g., E-r,E-r', E-x,E-x', E-rms, E-4*rms, E-norm, E-area, and E-ellipse. In a real case, such an emittance naming could appear as E-x,x',4rms(norm). Additionally- to be consistent with cleaning up-the dimension of emittances should be given in centimeters or meters, because rad are ratios and free of dimension. Therefore, instead of using cm mrad it is much more logical to communicate emittance data by writing epsilon m, where epsilon is the product of the maximum value for half of the beam thickness in meters and its opening angle in rad. (c) 2006 American Institute of Physics. C1 Univ Frankfurt, IAP, D-60438 Frankfurt, Germany. Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Becker, R (reprint author), Univ Frankfurt, IAP, Max Laue Str 1, D-60438 Frankfurt, Germany. NR 2 TC 3 Z9 3 U1 1 U2 1 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03B907 DI 10.1063/1.2166430 PN 2 PG 2 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200151 ER PT J AU Chacon-Golcher, E Bowers, KJ AF Chacon-Golcher, E Bowers, KJ TI Two-dimensional, three-velocity particle-in-cell with Monte Carlo collisions simulations of LANSCE's H- source SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE AB A two-dimensional, three-velocity particle-in-cell with Monte Carlo collisions (MCC) gun code is under development at LANSCE to study surface conversion H- ion source physics from a first-principles approach. The code is electromagnetostatic and is based on a sine transform/ tridiagonal matrix Poisson solver implemented in axisymmetric geometry. A filament discharge is simulated by the injection of seed electrons at a biased filament surface. These electrons drive the discharge through a collection of (presently 22) reactions implemented as a MCC package. The simulation region is rectangular with internal electrodes of arbitrary shape. Given the nature of the code, no ad hoc models are necessary to model sheath physics, diffusion across magnetic-field lines, ion extraction, or other plasma phenomena. (c) 2006 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Chacon-Golcher, E (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 9 TC 2 Z9 2 U1 0 U2 1 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03A526 DI 10.1063/1.2169819 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200073 ER PT J AU Grisham, LR Kwan, JW Hahto, SK Hahto, ST Leung, KN Westenskow, G AF Grisham, LR Kwan, JW Hahto, SK Hahto, ST Leung, KN Westenskow, G TI Negative halogen ions for fusion applications (invited) SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE ID CHAMBER; PROPAGATION; DRIVER; JT-60U AB Over the past quarter century, advances in hydrogen negative-ion sources have extended the usable range of hydrogen-isotope neutral beams to energies suitable for large magnetic confinement fusion devices. Recently negative halogen ions have been proposed as an alternative to positive ions for heavy-ion fusion drivers in inertial confinement fusion, because electron accumulation would be prevented in negative-ion beams, and if desired, the beams could be photodetached to neutrals. This article reports an experiment comparing the current density and beam emittance of Cl+ and Cl- extracted from substantially ion-ion plasmas with that of Ar+ extracted from an ordinary electron-ion plasma, all using the same source, extractor, and emittance scanner. At similar discharge conditions, the Cl- current was typically 85%-90% of the positive chlorine current, with an e(-)/Cl- ratio as low as 7 without grid magnets. The Cl- current was as much as 76% of the Ar+ current from a discharge with the same rf drive. The minimum normalized beam emittance and infer-red ion temperatures of Cl+, Cl-, and Ar+ were similar, so the current density and optical quality of Cl- appear as suitable for heavy-ion fusion applications as a positive noble gas ion of similar mass. Since F, 1, and Br should all behave similarly in an ion source, they should also be suitable as driver beams. (c) 2006 American Institute of Physics. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Grisham, LR (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 15 TC 9 Z9 9 U1 0 U2 0 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03A501 DI 10.1063/1.2149302 PN 2 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200048 ER PT J AU Gushenets, VI Bugaev, AS Oks, EM Yushkov, GY Hershcovitch, A Johnson, BM Kulevoy, TV Poole, HJ Swarovsky, AY AF Gushenets, VI Bugaev, AS Oks, EM Yushkov, GY Hershcovitch, A Johnson, BM Kulevoy, TV Poole, HJ Swarovsky, AY TI Generation of a boron ion beam in a modified ion source for semiconductor applications SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE AB Presented here are results of experimental studies on the production of intense beams of boron ions using a modified Bernas-Calutron ion source. Instead of using the conventional boron-trifluoride gas, a solid lithium-boron-tetrafluoride compound was heated to release boron-trifluoride. For optimum ion source parameters the measured 25-41 mA of total ion beam current was composed of 70% singly charged and about 1% doubly charged boron ions. (c) 2006 American Institute of Physics. C1 Russian Acad Sci, Inst High Current Elect, Tomsk, Russia. Brookhaven Natl Lab, Upton, NY 11973 USA. Inst Theoret & Expt Phys, Moscow 117259, Russia. PVI, Oxnard, CA USA. AA Bochvara Sci Res Inst Inorgan Mat, Siberian Branch, Moscow, Russia. RP Gushenets, VI (reprint author), Russian Acad Sci, Inst High Current Elect, Tomsk, Russia. EM gvi@opee.hcei.tsc.ru RI Oks, Efim/A-9409-2014; Yushkov, Georgy/O-8024-2015 OI Oks, Efim/0000-0002-9323-0686; Yushkov, Georgy/0000-0002-7615-6058 NR 10 TC 7 Z9 7 U1 1 U2 3 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03C109 DI 10.1063/1.2164894 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200164 ER PT J AU Hershcovitch, A Batalin, VA Bugaev, AS Gushenets, VI Johnson, BM Kolomiets, AA Kropachev, GN Kuibeda, RP Kulevoy, TV Litovko, IV Masunov, ES Oks, EM Pershin, VI Petrenko, SV Polozov, SM Poole, HJ Rudskoy, I Selznev, DN Storozhenko, PA Svarovski, AY Yushkov, GY AF Hershcovitch, A Batalin, VA Bugaev, AS Gushenets, VI Johnson, BM Kolomiets, AA Kropachev, GN Kuibeda, RP Kulevoy, TV Litovko, IV Masunov, ES Oks, EM Pershin, VI Petrenko, SV Polozov, SM Poole, HJ Rudskoy, I Selznev, DN Storozhenko, PA Svarovski, AY Yushkov, GY TI Ion sources for the varying needs of ion implantation SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE ID ELECTRON-BEAM ENHANCEMENT AB A joint research and development effort whose ultimate goal is to develop steady-state intense ion sources to meet the needs of the two energy extremes of ion implanters (mega-electron-volt and of hundreds of electron-volt) has been in progress for the past two years. Present day high-energy ion implanters utilize low charge state (usually single charge) ion sources in combination with rf accelerators. Usually, a MeV linear accelerator is used for acceleration of a few milliamperes. It is desirable to have instead an intense, high charge state ion source on a relatively low-energy platform (dc acceleration) to generate high-energy ion beams for implantation. This endeavor has already resulted in very high steady-state output currents of higher charge states antimony and phosphorous extracted ions. Low-energy ion implantation is performed presently by decelerating high-energy extracted ions. Consequently, output currents are low due to space charge problems. Contamination is also a problem due to gases and plasmas employed to mitigate the space charge issues. Our efforts involve molecular ions and a plasmaless/gasless deceleration method. A program overview is presented in this article. Although source specifics are described in accompanying papers, only this article contains our most recent results. (c) 2006 American Institute of Physics. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Inst Theoret & Expt Phys, Moscow 117259, Russia. Russian Acad Sci, High Current Elect Inst, Tomsk 634055, Russia. Moscow Engn Phys Inst, Moscow 115409, Russia. PVI, Oxnard, CA 93031 USA. State Res Inst Chem & Technol Organoelement Cpds, Moscow 111123, Russia. AA Bochvara Sci Res Inst Inorgan Mat, Russian Natl Res Ctr, Siberian Div, Seversk 636070, Russia. RP Hershcovitch, A (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. RI Oks, Efim/A-9409-2014; Yushkov, Georgy/O-8024-2015 OI Oks, Efim/0000-0002-9323-0686; Yushkov, Georgy/0000-0002-7615-6058 NR 9 TC 6 Z9 6 U1 1 U2 5 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03B510 DI 10.1063/1.2162827 PN 2 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200129 ER PT J AU Kalvas, T Hahto, SK Gicquel, F King, M Vainionpaa, JH Reijonen, J Leung, KN Miller, TG AF Kalvas, T. Hahto, S. K. Gicquel, F. King, M. Vainionpaa, J. H. Reijonen, J. Leung, K. N. Miller, T. G. TI Fast slit-beam extraction and chopping for neutron generator SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE AB High-intensity fast white neutron pulses are needed for pulsed fast neutron transmission spectroscopy (PFNTS). A compact tritium-tritium fusion reaction neutron generator with an integrated ion beam chopping system has been designed, simulated, and tested for PFNTS. The design consists of a toroidal plasma chamber with 20 extraction slits, concentric cylindrical electrodes, chopper plates, and a central titanium-coated beam target. The total ion beam current is 1 A. The beam chopping is done at 30 keV energy with a parallel-plate deflector integrated with an Einzel lens. Beam pulses with 5 ns width can be achieved with a 15 ns rise/fall time 1500 V sweep on the chopper plates. The neutrons are produced at 120 keV energy. A three-dimensional simulation code based on Vlasov iteration was developed for simulating the ion optics of this system. The results with this code were found to be consistent with other simulation codes. So far we have measured 50 ns ion beam pulses from the system. 0 2006 American Institute of Physics. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Tensor Technol Inc, Madison, AL 35758 USA. RP Kalvas, T (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 6 TC 2 Z9 2 U1 1 U2 3 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03B904 DI 10.1063/1.2163271 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200148 ER PT J AU Kawai, Y Alton, GD Tarvainen, O Suominen, P Koivisto, H AF Kawai, Y Alton, GD Tarvainen, O Suominen, P Koivisto, H TI Effect of broadband microwave radiation on the performance of a conventional B-minimum geometry electron cyclotron resonance ion source SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE AB The performances of electron cyclotron resonance ion sources can be enhanced by increasing the physical sizes or numbers of resonant zones embedded within their plasma volumes. Broadband rf power offers a simple, cost effective alternative for increasing the sizes of electron cyclotron resonance (ECR) zones in conventional minimum-B geometry sources over independently powered narrow bandwidth, multiple discrete frequency schemes. In this report, the charge-state enhancing effects of broadband microwave radiation are first demonstrated by comparing the high charge states of Ar ion beams produced by powering a conventional minimum-B geometry, 6.4 GHz ECR ion source with broadband microwave radiation 1200 MHz [full width at half maximum (FWHM)]) with those produced by conventional bandwidth [similar to 1.5 MHz (FWHM)] radiation. The results of these studies show that high-charge-state beams (e.g., Ar11+) can be enhanced by factors > 2 with broadband microwave radiation over those powered with narrow bandwidth radiation at the same power level, with or without voltage applied to the biased disk. The high charge states exhibit an anomalously strong increase in intensity at an optimum pressure with broadband microwave radiation. (c) 2006 American Institute of Physics. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. Univ Jyvaskyla, Dept Phys, FIN-40014 Jyvaskyla, Finland. RP Kawai, Y (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. EM gda@ornl.gov NR 13 TC 9 Z9 9 U1 0 U2 1 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03A331 DI 10.1063/1.2174830 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200032 ER PT J AU Kim, JS Liu, C Edgell, DH Pardo, R AF Kim, JS Liu, C Edgell, DH Pardo, R TI Monte Carlo beam capture and charge breeding simulation SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE ID IONIZATION CROSS-SECTIONS; RESONANCE ION-SOURCE; ATOMS AB A full six-dimensional (6D) phase space Monte Carlo beam capture charge-breeding simulation code examines the beam capture processes of singly charged ion beams injected to an electron cyclotron resonance (ECR) charge breeder from entry to exit. The code traces injected beam ions in an ECR ion source (ECRIS) plasma including Coulomb collisions, ionization, and charge exchange. The background ECRIS plasma is modeled within the current frame work of the generalized ECR ion source model. A simple sample case of an oxygen background plasma with an injected Ar + 1 ion beam produces lower charge breeding efficiencies than experimentally obtained. Possible reasons for discrepancies are discussed. (c) 2006 American Institute of Physics. C1 FAR TECH Inc, San Diego, CA 92121 USA. Univ Rochester, Rochester, NY 14627 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Kim, JS (reprint author), FAR TECH Inc, 10350 Sci Ctr Dr, San Diego, CA 92121 USA. EM kim@far-tech.com NR 11 TC 4 Z9 4 U1 0 U2 0 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03B106 DI 10.1063/1.2170105 PN 2 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200113 ER PT J AU Kulevoy, TV Petrenko, SV Kuibeda, RP Batalin, VA Pershin, VI Koslov, AV Stasevich, YB Hershcovitch, A Johnson, BM Oks, EM Gushenets, VI Poole, HJ Storozhenko, PA Gurkova, EL Alexeyenko, OV AF Kulevoy, TV Petrenko, SV Kuibeda, RP Batalin, VA Pershin, VI Koslov, AV Stasevich, YB Hershcovitch, A Johnson, BM Oks, EM Gushenets, VI Poole, HJ Storozhenko, PA Gurkova, EL Alexeyenko, OV TI Decaborane beam from ITEP bernas ion source SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE AB A joint research and development program is under way to develop steady-state intense ion sources for the two energy extremes of MeV and hundreds of eV. The difficulties of extraction and transportation of low-energy boron beams are investigated using a decaborane compound [I. Yamada, W. L. Brown, J. A. Northby, and M. Sosnowski, Nucl. Instrum. Methods Phys. Res. B 79, 223 (1993)]. Presented here are the results from ITEP experiments using the Bernas ion source with an indirectly heated LaB6 cathode. (c) 2006 American Institute of Physics. C1 Inst Theoret & Expt Phys, Moscow 117218, Russia. Brookhaven Natl Lab, Upton, NY 11973 USA. Russian Acad Sci, Inst High Current Elect, Tomsk 634055, Russia. PVI, Oxnard, CA 93031 USA. State Res Inst Chem & Technol Organelements Cpds, Moscow 111123, Russia. RP Kulevoy, TV (reprint author), Inst Theoret & Expt Phys, Moscow 117218, Russia. RI Oks, Efim/A-9409-2014 OI Oks, Efim/0000-0002-9323-0686 NR 5 TC 8 Z9 8 U1 0 U2 0 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03C102 DI 10.1063/1.2147737 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200157 ER PT J AU Kulevoy, TV Kuibeda, RP Petrenko, SV Batalin, VA Pershin, VI Kropachev, GN Hershcovitch, A Johnson, BM Gushenets, VI Oks, EM Poole, HJ AF Kulevoy, TV Kuibeda, RP Petrenko, SV Batalin, VA Pershin, VI Kropachev, GN Hershcovitch, A Johnson, BM Gushenets, VI Oks, EM Poole, HJ TI ITEP Bernas ion source with additional electron beam SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE ID IMPLANTATION AB A joint research and development program is underway to develop steady-state intense ion sources for the two energy extremes of MeV and hundreds of eV. For the MeV range the investigations were focused on charge-state enhancement for ions generated by the modified Bernas ion sources. Based on the previously successful ITEP experience with the e-metal vapor vacuum arc ion source [e.g., Batalin et al., Rev. Sci. Instrum. 75, 1900 (2004)], the injection of a high-energy electron beam into the Bernas ion source discharge region is expected to enhance the production of high charge states. Presented here are construction details and studies of electron-beam influence on the enhancement of ion-beam charge states generated by the modified Bernas ion source. (c) 2006 American Institute of Physics. C1 Inst Theoret & Expt Phys, Moscow 117218, Russia. Brookhaven Natl Lab, Upton, NY 11973 USA. Russian Acad Sci, Inst High Current Elect, Tomsk 634055, Russia. PVI, Oxnard, CA 93031 USA. RP Kulevoy, TV (reprint author), Inst Theoret & Expt Phys, Moscow 117218, Russia. RI Oks, Efim/A-9409-2014 OI Oks, Efim/0000-0002-9323-0686 NR 5 TC 11 Z9 11 U1 0 U2 1 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03C110 DI 10.1063/1.2165267 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200165 ER PT J AU Kwan, JW Bieniosek, FM Grote, DP Westenskow, GA AF Kwan, J. W. Bieniosek, F. M. Grote, D. P. Westenskow, G. A. TI Compact multibeamlet high-current injector for heavy-ion fusion drivers SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE AB Using curved electrodes in the injector, an array of converging beamlets can produce a beam with the envelope radius, convergence, and ellipticity matched to an electrostatic quadrupole channel. Experimental results were in good quantitative agreement with the simulation and have demonstrated the feasibility of this concept. Based on this approach, the size of a driver-scale injector system will be reduced, so the success of this experiment has significant economical and technical impacts on the architecture of heavy-ion fusion drivers. (c) 2006 American Institute of Physics. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Kwan, JW (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 3 TC 2 Z9 2 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0034-6748 EI 1089-7623 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03B503 DI 10.1063/1.2164947 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200122 ER PT J AU Leitner, D Lyneis, CM Loew, T Todd, DS Virostek, S Tarvainen, O AF Leitner, D Lyneis, CM Loew, T Todd, DS Virostek, S Tarvainen, O TI Status report of the 28 GHz superconducting electron cyclotron resonance ion source VENUS (invited) SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE ID BEAMS AB The superconducting versatile electron cyclotron resonance (ECR) ion source for nuclear science (VENUS) is a next generation superconducting ECR ion source designed to produce high-current, high-charge-state ions for the 88-Inch Cyclotron at the Lawrence Berkeley National Laboratory. VENUS also serves as the prototype ion source for the rare isotope accelerator (RIA) front end, where the goal is to produce intense beams of medium-charge-state ions. Example beams for the RIA accelerator are 15 p mu A of Kr17+(260 e mu A), 12 p mu A of Xe20+ (240 e mu A of Xe20+), and 8 p mu A of U28+(230 e mu A). To achieve these high currents, VENUS has been optimized for operation at 28 GHz, reaching maximal confinement fields of 4 and 3 T axially and over 2.2 T on the plasma chamber wall radially. After a commissioning phase at 18 GHz, the source started the 28 GHz operation in the summer of 2004. During that ongoing 28 GHz commissioning process, record ion-beam intensities have been extracted. For instance, measured extracted currents for the low to medium charge states were 270 e mu A of Xe27+ and 245 e mu A of Bi-29, while for the higher charge states 15 e mu A of Xe34+, 15 e mu A of Bi41+, and 0.5 e mu A of Bi50+ could be produced. Results from the ongoing 28 GHz commissioning as well as results using double-frequency heating with 18 and 28 GHz for oxygen and xenon are presented. The effect of the minimum B field on the ion source performance has been systematically measured for 18 and 28 GHz. In both cases the performance peaked at a minimum B field of about 80% of the resonance field. In addition, a strong dependence of the x-ray flux and energy on the minimum B field value was found. (c) 2006 American Institute of Physics. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Leitner, D (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 13 TC 37 Z9 38 U1 0 U2 0 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03A302-1 DI 10.1063/1.2149298 PN 2 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200003 ER PT J AU Lyneis, C Leitner, D Todd, D Virostek, S Loew, T Heinen, A Tarvainen, O AF Lyneis, C Leitner, D Todd, D Virostek, S Loew, T Heinen, A Tarvainen, O TI Measurements of bremsstrahlung production and x-ray cryostat heating in VENUS SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE ID ECR ION-SOURCE AB The VENUS superconducting electron cyclotron resonance (ECR) ion source is designed to operate at 28 GHz with up to 1.0 kW of rf power. Most of this power is absorbed by the plasma electrons and then dumped onto the plasma chamber wall. The distribution of heating and bremsstrahlung production is highly nonuniform and reflects the geometry of the magnetic confinement fields. The nonuniform distribution of electron losses to the wall results in localized heating on the aluminum chamber walls, which can lead to burnout. In addition, part of the bremsstrahlung produced by the collision of the hot-electrons with the walls is absorbed by the cold mass of the superconducting magnet leading to an additional heat load in the cryostat in the order of several watts. Therefore a new plasma chamber has been installed that incorporates a high-Z tantalum shield to reduce the cryostat heating and enhance water cooling to minimize the chance of burnout. In order to better understand the heat load, the spectrum of the bremsstrahlung has been carefully measured as a function of rf power, magnetic confinement, and rf frequency. In addition, the distribution of electron heating in VENUS magnetic field has been simulated with a three-dimensional computer code [H. Heinen and H. J. Andra, Proceedings of the 14th International Workshop on ECR Sources (CERN, Geneva, 1999), 224; H. J. Andra and A. Heinen, Proceedings of the 15th International Workshop on ECR Ion Sources, ECRIS'02 (Jyvaskyla, Finland 2002), 85.] to better understand the heat load distribution on the plasma chamber wall. The new plasma chamber design, results of the bremsstrahlung measurements, and the effectiveness of the high-Z shielding are described. (c) 2006 American Institute of Physics. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Inst Nucl Phys, D-48149 Munster, Germany. Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland. RP Lyneis, C (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 12 TC 22 Z9 23 U1 0 U2 1 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03A342 DI 10.1063/1.2163870 PN 2 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200043 ER PT J AU Moehs, DP AF Moehs, DP TI Submicrosecond beam notching at low energy SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE AB A technique for creating a burst of 100 ns notches (beam extinctions) in a H- beam at 454 kHz has been developed at <= 20 keV utilizing a magnetron ion source with a slit extraction system and a split extractor. Each half of the extractor is treated as part of a 50 Omega transmission line which can be pulsed at +/- 700 V, creating a 1400 V gradient across the extractor. A beam current reduction of better than 95% has been observed at the end of the Fermilab 400 MeV linac. Notched multiturn charge-exchange injection into the booster, a 400 MeV-8 GeV synchrotron, has been demonstrated with a charge reduction in the resulting beam gap of 83%. Presently, the trailing edge of the notch may be adversely affected by space charge resulting in a beam recovery with two different time constants. Efforts to minimize this effect are discussed. (c) 2006 American Institute of Physics. C1 Fermilab Astrophys Ctr, Batavia, IL 60510 USA. RP Moehs, DP (reprint author), Fermilab Astrophys Ctr, POB 500,MS 307, Batavia, IL 60510 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03B911 DI 10.1063/1.2166248 PN 2 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200155 ER PT J AU Oka, Y Ikeda, K Takeiri, Y Tsumori, K Kaneko, O Nagaoka, K Osakabe, M Asano, E Kondo, T Sato, M Shibuya, M Grisham, L Umeda, N Honda, A Ikeda, Y Yamamoto, T AF Oka, Y Ikeda, K Takeiri, Y Tsumori, K Kaneko, O Nagaoka, K Osakabe, M Asano, E Kondo, T Sato, M Shibuya, M Grisham, L Umeda, N Honda, A Ikeda, Y Yamamoto, T TI Doppler-shift spectra of H-alpha lines from negative-ion-based neutral beams for large helical device neutral beam injection SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE AB The velocity spectra of the negative-ion-(H-) based neutral beams are studied in high-performance large-area ion sources during injection into large helical device fusion plasmas. We are conducting systematic observations in standard neutral beam injection to correlate beam spectra with source operating conditions. Almost all of the transmitted beam power was at full acceleration energy (similar to 170 keV). The small stripping beam component which was produced in the extraction gap was evaluated to be about 9%-22% by amplitude of the measured spectra for the sources in beam lines I and 2. H- production uniformity from the spectrum profile was 86%-90% for three sources. For the longest pulse injection during 74 and 128 s, a full energy component tended to decrease with time, while the accelerator gap stripping tail tended to increase slightly with time, which is attributed to beam-induced outgassing in the accelerator. A higher conductance multislot ground and accelerator appeared to show little growth in the accelerator gap beam stripping during long pulses compared to the conventional multiaperture ground grid. The beam uniformity appeared to vary in part with the Cs uniformity on the plasma grid. (c) 2006 American Institute of Physics. C1 Natl Inst Fus Sci, Toki 5095292, Japan. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Japan Atom Energy Res Inst, Ibaraki 3110193, Japan. RP Oka, Y (reprint author), Natl Inst Fus Sci, Toki 5095292, Japan. NR 8 TC 2 Z9 2 U1 0 U2 0 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03A538 DI 10.1063/1.2166676 PN 2 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200085 ER PT J AU Oks, EM Savkin, KP Yushkov, GY Nikolaev, AG Anders, A Brown, IG AF Oks, EM Savkin, KP Yushkov, GY Nikolaev, AG Anders, A Brown, IG TI Measurement of total ion current from vacuum arc plasma sources SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE ID CATHODE EROSION; DISCHARGES; IONIZATION; ORIGIN AB The total ion current generated by a vacuum arc plasma source was measured. The discharge system investigated allowed ion collection from the arc plasma streaming through a hemispherical mesh anode with geometric transparency of 72%. A range of different cathode materials was investigated, and the arc current was varied over the range of 50-500 A. We find that the normalized ion current (I-ion/I-arc) depends on the cathode material, with values in the range from 5% to 19% and generally greater for elements of low cohesive energy. The application of a strong axial magnetic field in the cathode and arc region leads to increased normalized ion current, but only by virtue of enhanced ion charge states formed in a strong magnetic field. (c) 2006 American Institute of Physics. C1 Russian Acad Sci, High Current Elect Inst, Tomsk 634050, Russia. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Oks, EM (reprint author), Russian Acad Sci, High Current Elect Inst, Tomsk 634050, Russia. RI Oks, Efim/A-9409-2014; Anders, Andre/B-8580-2009; Yushkov, Georgy/O-8024-2015; Nikolaev, Alexey/R-2154-2016 OI Oks, Efim/0000-0002-9323-0686; Anders, Andre/0000-0002-5313-6505; Yushkov, Georgy/0000-0002-7615-6058; Nikolaev, Alexey/0000-0003-2724-3697 NR 17 TC 7 Z9 9 U1 1 U2 1 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03B504 DI 10.1063/1.2164967 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200123 ER PT J AU Petrenko, SV Kropachev, GN Kuibeda, RP Kulevoy, TV Pershin, VI Masunov, ES Polozov, SM Hershcovitch, A Johnson, BM Poole, HJ AF Petrenko, SV Kropachev, GN Kuibeda, RP Kulevoy, TV Pershin, VI Masunov, ES Polozov, SM Hershcovitch, A Johnson, BM Poole, HJ TI Transport line for beam generated by ITEP Bernas ion source SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE AB A joint research and development program is underway to investigate beam transport systems for intense steady-state ion sources for ion implanters. Two energy extremes of MeV and hundreds of eV are investigated using a modified Bernas ion source with an indirectly heated cathode. Results are presented for simulations of electrostatic systems performed to investigate the transportation of ion beams over a wide mass range: boron to decaborane. (c) 2006 American Institute of Physics. C1 Inst Theoret & Expt Phys, Moscow 117218, Russia. Moscow Engn Phys Inst, Moscow 115409, Russia. Brookhaven Natl Lab, Upton, NY 11973 USA. PVI, Oxnard, CA 93031 USA. RP Petrenko, SV (reprint author), Inst Theoret & Expt Phys, Moscow 117218, Russia. NR 1 TC 4 Z9 4 U1 0 U2 0 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03C112 DI 10.1063/1.2165746 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200167 ER PT J AU Pikin, A Alessi, JG Beebe, EN Kponou, A Prelec, K AF Pikin, A. Alessi, J. G. Beebe, E. N. Kponou, A. Prelec, K. TI Experimental study of electron- and ion-beam properties on the BNL electron-beam ion source and comparison with theoretical models SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE ID EBIS AB The maximum achievable perveance of the electron beam in the ion trap region and in the electron collector of the BNL Test electron-beam ion source (EBIS) has been measured for different electron-beam currents. These perveances determine the maximum degree of electron-beam retardation in these areas, which limits for the first case the maximum capacity of the ion trap, and for the second case the minimum dissipated power on the electron collector, for a given electron current. The results are compared with the results of optical simulations of the electron beam. In another set of experiments, data on Test EBIS ionization efficiency for different experimental conditions were obtained. These results are presented and compared with calculations based on stepwise ionization assuming 100% ion confinement in the trap. Finally, a series of experimentally measured longitudinal-energy spectra of the extracted ion beam are presented, and will be compared with the calculated energy spread. (c) 2006 American Institute of Physics. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Pikin, A (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 4 TC 8 Z9 8 U1 0 U2 0 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03A910 DI 10.1063/1.2149377 PN 2 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200106 ER PT J AU Pikin, A Alessi, JG Beebe, EN Kponou, A Prelec, K AF Pikin, A Alessi, JG Beebe, EN Kponou, A Prelec, K TI Study of a liquid metal ion source for external ion injection into electron-beam ion source SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article; Proceedings Paper CT 11th International Conference on Ion Sources CY SEP 12-16, 2005 CL Caen, FRANCE AB A liquid metal ion source (LMIS) has several attractive features as an external injector of primary ions (mostly metallic ions) into electron-beam ion source (EBIS). It does not use a buffer gas and therefore it provides only a very small gas load to the system; its control and operation are simple, power consumption does not exceed 10 W, and beam pulses are very stable. A gold-silicon LMIS was supplied by FEI Company (http://www.feibeamtech.com/pages/liquid.html) and tested in a pulsed regime with an ion pulse width of 2 ms and frequency up to 5 Hz. Total extracted ion current reached 50 mu A and the normalized emittance of the total ion beam was 0.05 pi mm mrad. The results of this test, as well as results of experiments in which this ion source is used for injection of Au ions into EBIS, are presented. (c) 2006 American Institute of Physics. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Pikin, A (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 3 TC 1 Z9 1 U1 0 U2 0 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 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 03A909 DI 10.1063/1.2166428 PN 2 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 041RK UT WOS:000237473200105 ER PT J AU Russell, SJ Wang, ZF Haynes, WB Carlsten, BE Earley, LM AF Russell, SJ Wang, ZF Haynes, WB Carlsten, BE Earley, LM TI Optical beam profile diagnostic for low energy, long pulse, moderate current electron beams SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID WIGGLER MAGNET; SHEET-BEAM AB Currently ongoing at Los Alamos National Laboratory is a program to develop high-power, planar 100-300 GHz traveling-wave tubes. An enabling technology for this effort is a sheet electron beam source and much of our effort has been geared toward understanding sheet beam generation and transport. Toward this end we have developed a robust, high resolution optical diagnostic for measuring the transverse density profiles of our electron beams. The diagnostic consists of a thin metal foil followed by an YAG:Ce or YAP:Ce scintillator crystal, both mounted on a vacuum actuator that allows us to position the foil/scintillator combination at arbitrary positions along the beam's longitudinal axis. The electron beam strikes the metal foil and is stopped, generating Bremsstrahlung x rays that are imaged by the scintillator crystal. This image is then captured by an optical system using a high-speed, intensified gated camera. Using this diagnostic, we have measured beam profiles with resolutions as low as 0.05 mm from a 0.51 mu P electron gun operated between 20 and 120 kV. (c) 2006 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Russell, SJ (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM srussell@lanl.gov OI Carlsten, Bruce/0000-0001-5619-907X NR 13 TC 2 Z9 2 U1 2 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 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD MAR PY 2006 VL 77 IS 3 AR 033302 DI 10.1063/1.2173028 PN 1 PG 7 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 031XS UT WOS:000236739100009 ER EF