FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Vaccaro, RJ
Zaki, AS
AF Vaccaro, Richard J.
Zaki, Ahmed S.
TI Statistical Modeling of Rate Gyros
SO IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
LA English
DT Article
DE Allan variance; best linear unbiased estimator; gyroscopes; inertial
measurement units
AB Gyroscopes are integral components of inertial measurement units, which are used for guidance and stabilization of many platforms. This paper presents an algorithm for estimating the statistical parameters that govern the performance of rate gyros, i.e., the spectral densities R and Q of the angle random walk and rate random walk components, respectively. Previous work on gyro modeling is based on computing the Allan variance of a gyro signal and using a well-known formula for its mean. The algorithm in this paper uses these as well as the following quantities, which are derived in this paper: the theoretical variance of the Allan variance and the covariance between different Allan variance points. The algorithm is developed using the formulation of the best linear unbiased estimator from statistical estimation theory. The performance of the algorithm is demonstrated using simulated and experimental data. A bound on the error in the integral of the gyro output, as a function of Q and R, is also derived.
C1 [Vaccaro, Richard J.] Univ Rhode Isl, Dept Elect Comp & Biomed Engn, Kingston, RI 02881 USA.
[Zaki, Ahmed S.] USN, Undersea Warfare Ctr, Div Newport, Newport, RI 02840 USA.
RP Vaccaro, RJ (reprint author), Univ Rhode Isl, Dept Elect Comp & Biomed Engn, Kingston, RI 02881 USA.
EM vaccaro@ele.uri.edu; ahmed.zaki@navy.mil
NR 9
TC 24
Z9 29
U1 2
U2 11
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9456
EI 1557-9662
J9 IEEE T INSTRUM MEAS
JI IEEE Trans. Instrum. Meas.
PD MAR
PY 2012
VL 61
IS 3
BP 673
EP 684
DI 10.1109/TIM.2011.2171609
PG 12
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 891WX
UT WOS:000300248600012
ER
PT J
AU Nipoti, R
Nath, A
Qadri, SB
Tian, YL
Albonetti, C
Carnera, A
Rao, MV
AF Nipoti, R.
Nath, A.
Qadri, S. B.
Tian, Y-L.
Albonetti, C.
Carnera, A.
Rao, Mulpuri V.
TI High-Dose Phosphorus-Implanted 4H-SiC: Microwave and Conventional
Post-Implantation Annealing at Temperatures >= 1700 degrees C
SO JOURNAL OF ELECTRONIC MATERIALS
LA English
DT Article
DE Silicon carbide; ion implantation; doping; post-implantation annealing;
electrical characterization
ID ELECTRON HALL-MOBILITY; ION-IMPLANTATION; SILICON-CARBIDE; QUALITY; 4H;
SIMULATION; ANISOTROPY; CAP; 6H
AB Semi-insulating 4H-SiC aY0001aY (c) wafers have been phosphorus ion implanted at 500A degrees C to obtain phosphorus box depth profiles with dopant concentration from 5 x 10(19) cm(-3) to 8 x 10(20) cm(-3). These samples have been annealed by microwave and conventional inductively heated systems in the temperature range 1700A degrees C to 2050A degrees C. Resistivity, Hall electron density, and Hall mobility of the phosphorus-implanted and annealed 4H-SiC layers have been measured in the temperature range from room temperature to 450A degrees C. The high-resolution x-ray diffraction and rocking curve of both virgin and processed 4H-SiC samples have been analyzed to obtain the sample crystal quality up to about 3 mu m depth from the wafer surface. For both increasing implanted phosphorus concentration and increasing post-implantation annealing temperature the implanted material resistivity decreases to an asymptotic value of about 1.5 x 10(-3) Omega cm. Increasing the implanted phosphorus concentration and post-implantation annealing temperature beyond 4 x 10(20) cm(-3) and 2000A degrees C, respectively, does not bring any apparent benefit with respect to the minimum obtainable resistivity. Sheet resistance and sheet electron density increase with increasing measurement temperature. Electron density saturates at 1.5 x 10(20) cm(-3) for implanted phosphorus plateau values a parts per thousand yen4 x 10(20) cm(-3), irrespective of the post-implantation annealing method. Implantation produces an increase of the lattice parameter in the bulk 4H-SiC underneath the phosphorus-implanted layer. Microwave and conventional annealing produce a further increase of the lattice parameter in such a depth region and an equivalent recovered lattice in the phosphorus-implanted layers.
C1 [Nipoti, R.] CNR IMM Bologna, I-40129 Bologna, Italy.
[Nath, A.; Rao, Mulpuri V.] George Mason Univ, Elect & Comp Engn Dept, Fairfax, VA 22030 USA.
[Qadri, S. B.] USN, Res Lab, Washington, DC 20375 USA.
[Tian, Y-L.] LT Technol, Fairfax, VA 22033 USA.
[Albonetti, C.] Ist Studio Mat Nanostrutturati, Consiglio Nazl Ricerche, I-40129 Bologna, Italy.
[Carnera, A.] Univ Padua, Dipartimento Fis Galileo Galilei, I-35131 Padua, Italy.
RP Nipoti, R (reprint author), CNR IMM Bologna, Via Gobetti 101, I-40129 Bologna, Italy.
EM nipoti@bo.imm.cnr.it
RI Albonetti, Cristiano/H-9943-2014; Nipoti, Roberta/N-6162-2014
OI Albonetti, Cristiano/0000-0002-5665-0788; Nipoti,
Roberta/0000-0002-8019-9149
FU Army Research Office (ARO) [W911NF-09-1-0407]; DARPA through U.S. Naval
Research Laboratory [N0017310-2-C006]
FX This material is based on work supported by the Army Research Office
(ARO under Contract #W911NF-09-1-0407) and also by DARPA through U.S.
Naval Research Laboratory Contract #N0017310-2-C006. The clean rooms,
ion beam, and electronic departments of CNR-IMM Bologna are acknowledged
for sample processing.
NR 33
TC 8
Z9 8
U1 0
U2 16
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0361-5235
J9 J ELECTRON MATER
JI J. Electron. Mater.
PD MAR
PY 2012
VL 41
IS 3
BP 457
EP 465
DI 10.1007/s11664-011-1794-7
PG 9
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied
SC Engineering; Materials Science; Physics
GA 887LY
UT WOS:000299930100005
ER
PT J
AU Looney, R
AF Looney, Robert
TI The Quest: Energy, Security, and the Remaking of the Modern World
SO MIDDLE EAST JOURNAL
LA English
DT Book Review
C1 [Looney, Robert] Naval Postgrad Sch, Monterey, CA 93943 USA.
RP Looney, R (reprint author), Naval Postgrad Sch, Monterey, CA 93943 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU MIDDLE EAST INST
PI WASHINGTON
PA 1761 N ST NW, CIRCULATION DEPT, WASHINGTON, DC 20036-2882 USA
SN 0026-3141
J9 MIDDLE EAST J
JI Middle East J.
PD SPR
PY 2012
VL 66
IS 2
BP 381
EP 382
PG 2
WC Area Studies
SC Area Studies
GA V31XL
UT WOS:000208916200021
ER
PT J
AU Sandlin, AT
Magann, EF
Ounpraseuth, ST
Dahlke, JD
Igwe, E
Chang, E
Abuhamad, AZ
Chauhan, SP
AF Sandlin, Adam T.
Magann, Everett F.
Ounpraseuth, Songthip T.
Dahlke, Josh D.
Igwe, Elena
Chang, Eugene
Abuhamad, Alfred Z.
Chauhan, Suneet P.
TI Signifi cant Variability in Antenatal Detection of Small-for-Gestational
Age Neonates among Tertiary Centers
SO REPRODUCTIVE SCIENCES
LA English
DT Meeting Abstract
C1 [Sandlin, Adam T.; Magann, Everett F.; Ounpraseuth, Songthip T.] Univ Arkansas Med Sci, Little Rock, AR 72205 USA.
[Dahlke, Josh D.] Naval Med Ctr Portsmouth, Portsmouth, VA USA.
[Igwe, Elena] Temple Univ, Philadelphia, PA 19122 USA.
[Chang, Eugene] Med Univ S Carolina, Charleston, SC 29425 USA.
[Abuhamad, Alfred Z.; Chauhan, Suneet P.] Eastern Virginia Med Sch, Norfolk, VA 23501 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1933-7191
EI 1933-7205
J9 REPROD SCI
JI Reprod. Sci.
PD MAR
PY 2012
VL 19
IS S3
SU 3
BP 371A
EP 371A
PG 1
WC Obstetrics & Gynecology; Reproductive Biology
SC Obstetrics & Gynecology; Reproductive Biology
GA 287LP
UT WOS:000329543603243
ER
PT J
AU Mace, NA
AF Mace, Nancy A.
TI Amelia
SO SCRIBLERIAN AND THE KIT-CATS
LA English
DT Book Review
C1 [Mace, Nancy A.] USN Acad, Annapolis, MD 21402 USA.
RP Mace, NA (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU NEW YORK UNIV
PI NEW YORK
PA C/O PROF MARILYN GAULL, DEPT ENGLISH, NEW YORK, NY 10003-4556 USA
SN 0036-9640
J9 SCRIBLERIAN KIT-CATS
JI Scriblerian Kit-Cats
PD SPR-FAL
PY 2012
VL 44-45
BP 70
EP 71
PG 2
WC Literature, British Isles
SC Literature
GA 082HY
UT WOS:000314384100013
ER
PT J
AU Hysell, DL
Varney, RH
Vlasov, MN
Nossa, E
Watkins, B
Pedersen, T
Huba, JD
AF Hysell, D. L.
Varney, R. H.
Vlasov, M. N.
Nossa, E.
Watkins, B.
Pedersen, T.
Huba, J. D.
TI Estimating the electron energy distribution during ionospheric
modification from spectrographic airglow measurements
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID PUMP ENHANCED AIRGLOW; GROSS EARTH DATA; SUPRATHERMAL ELECTRONS; HEATING
EXPERIMENTS; MAGNETIC ZENITH; F-REGION; LANGMUIR TURBULENCE;
THERMAL-ELECTRONS; CROSS-SECTIONS; HF
AB The electron energy distribution during an F region ionospheric modification experiment at the HAARP facility near Gakona, Alaska, is inferred from spectrographic airglow emission data. Emission lines at 630.0, 557.7, and 844.6 nm are considered along with the absence of detectable emissions at 427.8 nm. Estimating the electron energy distribution function from the airglow data is a problem in classical linear inverse theory. We describe an augmented version of the method of Backus and Gilbert which we use to invert the data. The method optimizes the model resolution, the precision of the mapping between the actual electron energy distribution and its estimate. Here, the method has also been augmented so as to limit the model prediction error. Model estimates of the suprathermal electron energy distribution versus energy and altitude are incorporated in the inverse problem formulation as representer functions. Our methodology indicates a heater-induced electron energy distribution with a broad peak near 5 eV that decreases approximately exponentially by 30 dB between 5-50 eV.
C1 [Hysell, D. L.; Varney, R. H.; Vlasov, M. N.; Nossa, E.] Cornell Univ, Ithaca, NY 14853 USA.
[Watkins, B.] Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA.
[Pedersen, T.] USAF, Space Vehicles Directorate, Res Lab, Kirtland AFB, NM 87117 USA.
[Huba, J. D.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Hysell, DL (reprint author), Cornell Univ, Ithaca, NY 14853 USA.
OI Varney, Roger/0000-0002-5976-2638
FU DARPA [HR0011-09-C-0099]; Office of Naval Research; Air Force Research
Laboratory [N00014-07-1-1079]; Air Force Office of Scientific Research;
High Frequency Active Auroral Research Program (HAARP)
FX This project was supported by DARPA through contract HR0011-09-C-0099.
Additional support came from the High Frequency Active Auroral Research
Program (HAARP) and from the Office of Naval Research and the Air Force
Research Laboratory under grant N00014-07-1-1079 to Cornell. Work at
AFRL was supported by the Air Force Office of Scientific Research.
NR 50
TC 4
Z9 4
U1 0
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD FEB 29
PY 2012
VL 117
AR A02317
DI 10.1029/2011JA017187
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 903RE
UT WOS:000301135600001
ER
PT J
AU Mackey, M
Schuele, DE
Zhu, L
Flandin, L
Wolak, MA
Shirk, JS
Hiltner, A
Baer, E
AF Mackey, Matthew
Schuele, Donald E.
Zhu, Lei
Flandin, Lionel
Wolak, Mason A.
Shirk, James S.
Hiltner, Anne
Baer, Eric
TI Reduction of Dielectric Hysteresis in Multi layered Films via
Nanoconfinement
SO MACROMOLECULES
LA English
DT Article
ID ELECTRICAL ENERGY DENSITY; FERROELECTRIC POLYMERS; POLY(VINYLIDENE
FLUORIDE); CONFINED CRYSTALLIZATION; POLYVINYLIDENE FLUORIDE;
NANOCOMPOSITES; OXIDE; STRENGTH; FIELD; PVDF
AB Micro/nanolayer coextrusion was used to fabricate polycarbonate (PC)/poly(vinylidene fluoride) (PVDF) layered films with significantly reduced dielectric losses while maintaining high energy density. The high-field polarization hysteresis was characterized for layered films as a function of PVDF layer thickness (6000 to 10 nm) and composition (10 to 70 vol % PVDF), and was found to decrease with decreasing layer thickness and PVDF content. To gain a mechanistic understanding of the layer thickness (or nanoconfinement) effect, wide-angle X-ray diffraction, polarized Fourier transform infrared spectroscopy, and broadband dielectric spectroscopy were employed. The results revealed that charge migration, instead of dipole flipping, was responsible for the hysteresis in multilayered films. The absence of PVDF dipole-flipping was attributed to the nonuniform electric field distribution in the layered structure, where the field in PVDF layers were calculated to be significantly lower than that in PC layers due to large contrast in dielectric constant (similar to 3 for PC versus similar to 12 for PVDF). The charges were likely to be impurity ions in the form of catalyst residue or surfactants from suspension polymerization. The characteristics of the dielectric spectroscopy relaxation indicated that ions mostly existed in the PVDF layers, and PC/PVDF interfaces prevented them from entering adjacent layers. Therefore, as the layer thickness decreases to nanometer scales, the amount of ion movement, dielectric loss, and hysteresis were decreased. This study provides clear evidence of the nanoconfinement effect in multilayered films, which advantageously decreases the hysteresis loss.
C1 [Mackey, Matthew; Schuele, Donald E.; Zhu, Lei; Hiltner, Anne; Baer, Eric] Case Western Reserve Univ, Dept Macromol Sci & Engn, Cleveland, OH 44106 USA.
[Flandin, Lionel] Univ Savoie, LEPMI, CNRS, UMR 5279, F-73376 Le Bourget Du Lac, France.
[Wolak, Mason A.; Shirk, James S.] USN, Res Lab, Washington, DC 20375 USA.
RP Zhu, L (reprint author), Case Western Reserve Univ, Dept Macromol Sci & Engn, Cleveland, OH 44106 USA.
EM lxz121@case.edu; exb6@case.edu
RI Zhu, Lei/C-8754-2013
OI Zhu, Lei/0000-0001-6570-9123
FU National Science Foundation through the Center for Layered Polymeric
Systems (CLiPS) Science and Technology Center [DMR-0423914]; Office of
Naval Research [N00014-10-1-0349]
FX This research was generously supported by the National Science
Foundation through the Center for Layered Polymeric Systems (CLiPS)
Science and Technology Center (DMR-0423914) and the Office of Naval
Research (N00014-10-1-0349). Jung-Kai Tseng is acknowledged for carrying
out the polarized FTIR experiments.
NR 52
TC 35
Z9 37
U1 6
U2 72
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
EI 1520-5835
J9 MACROMOLECULES
JI Macromolecules
PD FEB 28
PY 2012
VL 45
IS 4
BP 1954
EP 1962
DI 10.1021/ma202267r
PG 9
WC Polymer Science
SC Polymer Science
GA 898QN
UT WOS:000300757000025
ER
PT J
AU Yang, R
Huang, L
Lai, YC
Pecora, LM
AF Yang, Rui
Huang, Liang
Lai, Ying-Cheng
Pecora, Louis M.
TI Modulating quantum transport by transient chaos
SO APPLIED PHYSICS LETTERS
LA English
DT Article
DE chaos; electrical conductivity; nanostructured materials; quantum dots
ID CONDUCTANCE FLUCTUATIONS; SYSTEMS; EIGENFUNCTIONS; ORBITS; SCARS
AB We propose a scheme to modulate quantum transport in nanostructures based on classical chaos. By applying external gate voltage to generate a classically forbidden region, transient chaos can be generated, and the escape rate associated with the underlying non-attracting chaotic set can be varied continuously by adjusting the gate voltage. We demonstrate that this can effectively modulate the quantum conductance-fluctuation patterns. A theory based on self-energies and the spectrum of the generalized non-Hermitian Hamiltonian of the open quantum system is developed to understand the modulation mechanism. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3690046]
C1 [Yang, Rui; Huang, Liang; Lai, Ying-Cheng] Arizona State Univ, Sch Elect Comp & Energy Engn, Tempe, AZ 85287 USA.
[Huang, Liang] Lanzhou Univ, Inst Computat Phys & Complex Syst, Lanzhou 730000, Gansu, Peoples R China.
[Lai, Ying-Cheng] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA.
[Pecora, Louis M.] USN, Res Lab, Washington, DC 20375 USA.
RP Huang, L (reprint author), Arizona State Univ, Sch Elect Comp & Energy Engn, Tempe, AZ 85287 USA.
EM huangl@lzu.edu.cn
RI Huang, Liang/A-1671-2009
FU AFOSR [FA9550-09-1-0260]; ONR [N00014-08-1-0627]; NSFC [11005053]
FX This work was supported by AFOSR under Grant No. FA9550-09-1-0260 and by
ONR under Grant No. N00014-08-1-0627. L. H. was also supported by NSFC
under Grant No. 11005053.
NR 18
TC 14
Z9 14
U1 0
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 27
PY 2012
VL 100
IS 9
AR 093105
DI 10.1063/1.3690046
PG 4
WC Physics, Applied
SC Physics
GA 908QI
UT WOS:000301504800052
ER
PT J
AU Chattopadhyay, S
Tchesnokova, V
McVeigh, A
Kisiela, DI
Dori, K
Navarro, A
Sokurenko, EV
Savarino, SJ
AF Chattopadhyay, Sujay
Tchesnokova, Veronika
McVeigh, Annette
Kisiela, Dagmara I.
Dori, Kathleen
Navarro, Armando
Sokurenko, Evgeni V.
Savarino, Stephen J.
TI Adaptive Evolution of Class 5 Fimbrial Genes in Enterotoxigenic
Escherichia coli and Its Functional Consequences
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID FACTOR ANTIGEN-I; COLONIZATION FACTOR; FIMH ADHESIN; BINDING
SPECIFICITIES; BACTERIAL ADHESION; CFA/I FIMBRIAE; MUTATIONS; DIARRHEA;
DIVERSITY; SELECTION
AB Class 5 fimbriae of enterotoxigenic Escherichia coli (ETEC) comprise eight serologically discrete colonization factors that mediate small intestinal adhesion. Their differentiation has been attributed to the pressure imposed by host adaptive immunity. We sequenced the major pilin and minor adhesin subunit genes of a geographically diverse population of ETEC elaborating CFA/I (n = 31), CS17 (n = 20), and CS2 (n = 18) and elucidated the functional effect of microevolutionary processes. Between the fimbrial types, the pairwise nucleotide diversity for the pilin or adhesin genes ranged from 35-43%. Within each fimbrial type, there were 17 non-synonymous and 1 synonymous point mutations among all pilin or adhesin gene copies, implying that each fimbrial type was acquired by ETEC strains very recently, consistent with a recent origin of this E. coli pathotype. The 17 non-synonymous allelic differences occurred in the CFA/I pilin gene cfaB (two changes) and adhesin gene cfaE (three changes), and CS17 adhesin gene csbD (12 changes). All but one amino acid change in the adhesins clustered around the predicted ligand-binding pocket. Functionally, these changes conferred an increase in cell adhesion in a flow chamber assay. In contrast, the two mutations in the non-adhesive CfaB subunit localized to the intersubunit interface and significantly reduced fimbrial adhesion in this assay. In conclusion, naturally occurring mutations in the ETEC adhesive and non-adhesive subunits altered function, were acquired under positive selection, and are predicted to impact bacteria-host interactions.
C1 [Chattopadhyay, Sujay; Tchesnokova, Veronika; Kisiela, Dagmara I.; Sokurenko, Evgeni V.] Univ Washington, Dept Microbiol, Sch Med, Seattle, WA 98195 USA.
[McVeigh, Annette; Dori, Kathleen; Savarino, Stephen J.] USN, Med Res Ctr, Enter Dis Dept, Silver Spring, MD 20910 USA.
[Navarro, Armando] Univ Nacl Autonoma Mexico, Fac Med, Dept Salud Publ, Mexico City 04510, DF, Mexico.
[Savarino, Stephen J.] Uniformed Serv Univ Hlth Sci, Dept Pediat, Bethesda, MD 20814 USA.
RP Sokurenko, EV (reprint author), Univ Washington, Dept Microbiol, Sch Med, Room E309,Hlth Sci Bldg,Campus Box 357242, Seattle, WA 98195 USA.
EM evs@u.washington.edu; stephen.savarino@med.navy.mil
FU U.S. Army Medical Research and Materiel Command Award [6000 RAD1 DA2
A0307]; Henry M. Jackson Foundation for the Advancement of Military
Medicine [G1876KI]
FX This work was supported by the U.S. Army Medical Research and Materiel
Command Award 6000 RAD1 DA2 A0307 (to S. J. S.) and the Henry M. Jackson
Foundation for the Advancement of Military Medicine Grant G1876KI (to S.
J. S.).
NR 49
TC 11
Z9 11
U1 0
U2 8
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA
SN 0021-9258
J9 J BIOL CHEM
JI J. Biol. Chem.
PD FEB 24
PY 2012
VL 287
IS 9
BP 6150
EP 6158
DI 10.1074/jbc.M111.303735
PG 9
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 899CQ
UT WOS:000300791800008
PM 22215679
ER
PT J
AU Richie, TL
Haberberger, RL
AF Richie, Thomas L.
Haberberger, Richard L.
TI RTS,S/AS01 Malaria Vaccine in African Children
SO NEW ENGLAND JOURNAL OF MEDICINE
LA English
DT Letter
C1 [Richie, Thomas L.] US Mil Malaria Vaccine Program, Silver Spring, MD USA.
[Haberberger, Richard L.] USN, Med Res Ctr, Silver Spring, MD USA.
RP Richie, TL (reprint author), US Mil Malaria Vaccine Program, Silver Spring, MD USA.
EM thomas.richie@med.navy.mil
NR 2
TC 1
Z9 1
U1 0
U2 0
PU MASSACHUSETTS MEDICAL SOC
PI WALTHAM
PA WALTHAM WOODS CENTER, 860 WINTER ST,, WALTHAM, MA 02451-1413 USA
SN 0028-4793
J9 NEW ENGL J MED
JI N. Engl. J. Med.
PD FEB 23
PY 2012
VL 366
IS 8
BP 765
EP 765
PG 1
WC Medicine, General & Internal
SC General & Internal Medicine
GA 896FS
UT WOS:000300551500019
PM 22356335
ER
PT J
AU David, HN
Haelewyn, B
Degoulet, M
Colomb, DG
Risso, JJ
Abraini, JH
AF David, Helene N.
Haelewyn, Benoit
Degoulet, Mickael
Colomb, Denis G., Jr.
Risso, Jean-Jacques
Abraini, Jacques H.
TI Ex Vivo and In Vivo Neuroprotection Induced by Argon When Given after an
Excitotoxic or Ischemic Insult
SO PLOS ONE
LA English
DT Article
ID TRANSIENT CEREBRAL-ISCHEMIA; NITROUS-OXIDE; NOBLE-GASES; FOREBRAIN
ISCHEMIA; ARTERY OCCLUSION; BRAIN-INJURY; XENON; RAT; STROKE; ISOFLURANE
AB In vitro studies have well established the neuroprotective action of the noble gas argon. However, only limited data from in vivo models are available, and particularly whether postexcitotoxic or postischemic argon can provide neuroprotection in vivo still remains to be demonstrated. Here, we investigated the possible neuroprotective effect of postexcitotoxic-postischemic argon both ex vivo in acute brain slices subjected to ischemia in the form of oxygen and glucose deprivation (OGD), and in vivo in rats subjected to an intrastriatal injection of N-methyl-D-aspartate (NMDA) or to the occlusion of middle-cerebral artery (MCAO). We show that postexcitotoxic-postischemic argon reduces OGD-induced cell injury in brain slices, and further reduces NMDA-induced brain damage and MCAO-induced cortical brain damage in rats. Contrasting with its beneficial effect at the cortical level, we show that postischemic argon increases MCAO-induced subcortical brain damage and provides no improvement of neurologic outcome as compared to control animals. These results extend previous data on the neuroprotective action of argon. Particularly, taken together with previous in vivo data that have shown that intraischemic argon has neuroprotective action at both the cortical and subcortical level, our findings on postischemic argon suggest that this noble gas could be administered during but not after ischemia, i.e. before but not after reperfusion has occurred, in order to provide cortical neuroprotection and to avoid increasing subcortical brain damage. Also, the effects of argon are discussed as regards to the oxygen-like chemical, pharmacological, and physical properties of argon.
C1 [David, Helene N.; Abraini, Jacques H.] Univ Laval, Ctr Rech, Ctr Hosp Affilie Univ Hotel Dieu Levis, Levis, PQ, Canada.
[Haelewyn, Benoit] Univ Caen Basse Normandie, CURB, Caen, France.
[Haelewyn, Benoit; Degoulet, Mickael; Abraini, Jacques H.] Univ Caen Basse Normandie, UMR 6232, Caen, France.
[Haelewyn, Benoit; Degoulet, Mickael; Abraini, Jacques H.] CNRS, UMR 6232, Caen, France.
[Colomb, Denis G., Jr.] USN, Expt Diving Unit, Panama City, FL USA.
[Risso, Jean-Jacques] Inst Rech Biomed Armees, Antenne Toulon, France.
[Abraini, Jacques H.] Univ Laval, Ctr Rech, Inst Univ Sante Mentale Quebec, Quebec City, PQ, Canada.
RP David, HN (reprint author), Univ Laval, Ctr Rech, Ctr Hosp Affilie Univ Hotel Dieu Levis, Levis, PQ, Canada.
EM jh.abraini@gmail.com
FU Direction Generale de l'Armement of the French Ministry of Defence;
NNOXe Pharmaceuticals (Quebec City, QC, Canada)
FX This work was supported by the Direction Generale de l'Armement of the
French Ministry of Defence and NNOXe Pharmaceuticals (Quebec City, QC,
Canada). The funders had no role in study design, data collection and
analysis, decision to publish, or preparation of the manuscript. No
additional external funding was received for this study.
NR 46
TC 23
Z9 23
U1 0
U2 2
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD FEB 22
PY 2012
VL 7
IS 2
AR e30934
DI 10.1371/journal.pone.0030934
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 926ZZ
UT WOS:000302875500006
PM 22383981
ER
PT J
AU Hoang, K
Janotti, A
van de Walle, CG
AF Hoang, Khang
Janotti, Anderson
van de Walle, Chris G.
TI Mechanisms for the decomposition and dehydrogenation of Li amide/imide
SO PHYSICAL REVIEW B
LA English
DT Article
ID HYDROGEN STORAGE PROPERTIES; TOTAL-ENERGY CALCULATIONS; AUGMENTED-WAVE
METHOD; N-H SYSTEM; LITHIUM AMIDE; CRYSTAL-STRUCTURE; REACTION PATHWAY;
METAL-HYDRIDES; H-2 STORAGE; BASIS-SET
AB Reversible reaction involving Li amide (LiNH2) and Li imide (Li2NH) is a potential mechanism for hydrogen storage. Recent synchrotron x-ray diffraction experiments [W. I. David et al., J. Am. Chem. Soc. 129, 1594 (2007)] suggest that the transformation between LiNH2 and Li2NH is a bulk reaction that occurs through nonstoichiometric processes and involves the migration of Li+ and H+ ions. In order to understand the atomistic mechanisms behind these processes, we carry out comprehensive first-principles studies of native point defects and defect complexes in the two compounds. We find that both LiNH2 and Li2NH are prone to Frenkel disorder on the Li sublattice. Lithium interstitials and vacancies have low formation energies and are highly mobile, and therefore play an important role in mass transport and ionic conduction. Hydrogen interstitials and vacancies, on the other hand, are responsible for forming and breaking N-H bonds, which is essential in the Li amide/imide reaction. Based on the structure, energetics, and migration of hydrogen-, lithium-, and nitrogen-related defects, we propose that LiNH2 decomposes into Li2NH and NH3 according to two competing mechanisms with different activation energies: one mechanism involves the formation of native defects in the interior of thematerial, the other at the surface. As a result, the prevailing mechanism and hence the effective activation energy for decomposition depend on the surface-to-volume ratio or the specific surface area, which changes with particle size during ball milling. These mechanisms also provide an explanation for the dehydrogenation of LiNH2 + LiH mixtures.
C1 [Hoang, Khang; Janotti, Anderson; van de Walle, Chris G.] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA.
RP Hoang, K (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM hoang@dave.nrl.navy.mil; vandewalle@mrl.ucsb.edu
RI Hoang, Khang/C-2879-2008; Van de Walle, Chris/A-6623-2012; Janotti,
Anderson/F-1773-2011
OI Hoang, Khang/0000-0003-1889-0745; Van de Walle,
Chris/0000-0002-4212-5990; Janotti, Anderson/0000-0001-5028-8338
FU General Motors Corporation; US Department of Energy [DE-FG02-07ER46434];
NSF [CHE-0321368, DMR070072N]; DOE Office of Science [DE-AC02-05CH11231]
FX K.H. was supported by General Motors Corporation, and A.J. by the US
Department of Energy (Grant No. DE-FG02-07ER46434). We acknowledge the
use of the CNSI Computing Facility under NSF Grant No. CHE-0321368,
NERSC resources supported by the DOE Office of Science under Contract
No. DE-AC02-05CH11231, and the Ranger supercomputer from the TeraGrid
computing resources supported by the NSF under Grant No. DMR070072N.
NR 54
TC 13
Z9 13
U1 0
U2 31
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 FEB 22
PY 2012
VL 85
IS 6
AR 064115
DI 10.1103/PhysRevB.85.064115
PG 12
WC Physics, Condensed Matter
SC Physics
GA 896KV
UT WOS:000300565700001
ER
PT J
AU Banerjee, R
Ghosh, D
Padmanaban, E
Ramaswamy, R
Pecora, LM
Dana, SK
AF Banerjee, Ranjib
Ghosh, Dibakar
Padmanaban, E.
Ramaswamy, R.
Pecora, L. M.
Dana, Syamal K.
TI Enhancing synchrony in chaotic oscillators by dynamic relaying
SO PHYSICAL REVIEW E
LA English
DT Article
ID LAG SYNCHRONIZATION; PHASE SYNCHRONIZATION; SYSTEMS; LASERS
AB In a chain of mutually coupled oscillators, the coupling threshold for synchronization between the outermost identical oscillators decreases when a type of impurity (in terms of parameter mismatch) is introduced in the inner oscillator(s). The outer oscillators interact indirectly via dynamic relaying, mediated by the inner oscillator(s). We confirm this enhancing of critical coupling in the chaotic regimes of the Lorenz system, in the Rossler system in the absence of coupling delay, and in the Mackey-Glass system with delay coupling. The enhancing effect is experimentally verified in the electronic circuit of Rossler oscillators.
C1 [Banerjee, Ranjib] Gargi Mem Inst Technol, Dept Math, Kolkata, India.
[Ghosh, Dibakar] Dinabandhu Andrews Coll, Dept Math, Kolkata 700084, India.
[Banerjee, Ranjib; Padmanaban, E.; Dana, Syamal K.] Indian Inst Chem Biol, CSIR, Kolkata 700032, India.
[Ramaswamy, R.] Univ Hyderabad, Hyderabad 500046, Andhra Pradesh, India.
[Pecora, L. M.] USN, Res Lab, Washington, DC 20375 USA.
RP Banerjee, R (reprint author), Gargi Mem Inst Technol, Dept Math, Kolkata, India.
OI Ramaswamy, Ramakrishna/0000-0002-9085-8224
FU BRNS/DAE, India [2009/34/26/BRNS]; US Naval Research Laboratory
FX This work is partially supported by the BRNS/DAE, India (Project No.
2009/34/26/BRNS). L. M. P. is supported by the US Naval Research
Laboratory.
NR 28
TC 10
Z9 10
U1 1
U2 9
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 FEB 21
PY 2012
VL 85
IS 2
AR 027201
DI 10.1103/PhysRevE.85.027201
PN 2
PG 5
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 896NJ
UT WOS:000300573900011
PM 22463360
ER
PT J
AU Abramowski, A
Acero, F
Aharonian, F
Akhperjanian, AG
Anton, G
Balzer, A
Barnacka, A
de Almeida, UB
Becherini, Y
Becker, J
Behera, B
Bernlohr, K
Birsin, E
Biteau, J
Bochow, A
Boisson, C
Bolmont, J
Bordas, P
Brucker, J
Brun, F
Brun, P
Bulik, T
Busching, I
Carrigan, S
Casanova, S
Cerruti, M
Chadwick, PM
Charbonnier, A
Chaves, RCG
Cheesebrough, A
Clapson, AC
Coignet, G
Cologna, G
Conrad, J
Dalton, M
Daniel, MK
Davids, ID
Degrange, B
Deil, C
Dickinson, HJ
Djannati-Atai, A
Domainko, W
Drury, LO
Dubus, G
Dutson, K
Dyks, J
Dyrda, M
Egberts, K
Eger, P
Espigat, P
Fallon, L
Farnier, C
Fegan, S
Feinstein, F
Fernandes, MV
Fiasson, A
Fontaine, G
Forster, A
Fussling, M
Gallant, YA
Gast, H
Gerard, L
Gerbig, D
Giebels, B
Glicenstein, JF
Gluck, B
Goret, P
Goring, D
Haffner, S
Hague, JD
Hampf, D
Hauser, M
Heinz, S
Heinzelmann, G
Henri, G
Hermann, G
Hinton, JA
Hoffmann, A
Hofmann, W
Hofverberg, P
Holler, M
Horns, D
Jacholkowska, A
de Jager, OC
Jahn, C
Jamrozy, M
Jung, I
Kastendieck, MA
Katarzynski, K
Katz, U
Kaufmann, S
Keogh, D
Khangulyan, D
Khelifi, B
Klochkov, D
Kluzniak, W
Kneiske, T
Komin, N
Kosack, K
Kossakowski, R
Laffon, H
Lamanna, G
Lennarz, D
Lohse, T
Lopatin, A
Lu, CC
Marandon, V
Marcowith, A
Masbou, J
Maurin, D
Maxted, N
Mayer, M
McComb, TJL
Medina, MC
Mehault, J
Moderski, R
Moulin, E
Naumann, CL
Naumann-Godo, M
de Naurois, M
Nedbal, D
Nekrassov, D
Nguyen, N
Nicholas, B
Niemiec, J
Nolan, SJ
Ohm, S
Wilhelmi, ED
Opitz, B
Ostrowski, M
Oya, I
Panter, M
Arribas, MP
Pedaletti, G
Pelletier, G
Petrucci, PO
Pita, S
Puhlhofer, G
Punch, M
Quirrenbach, A
Raue, M
Rayner, SM
Reimer, A
Reimer, O
Renaud, M
de los Reyes, R
Rieger, F
Ripken, J
Rob, L
Rosier-Lees, S
Rowell, G
Rudak, B
Rulten, CB
Ruppel, J
Sahakian, V
Sanchez, DA
Santangelo, A
Schlickeiser, R
Schock, FM
Schulz, A
Schwanke, U
Schwarzburg, S
Schwemmer, S
Sheidaei, F
Skilton, JL
Sol, H
Spengler, G
Stawarz, L
Steenkamp, R
Stegmann, C
Stinzing, F
Stycz, K
Sushch, I
Szostek, A
Tavernet, JP
Terrier, R
Tluczykont, M
Valerius, K
van Eldik, C
Vasileiadis, G
Venter, C
Vialle, JP
Viana, A
Vincent, P
Volk, HJ
Volpe, F
Vorobiov, S
Vorster, M
Wagner, SJ
Ward, M
White, R
Wierzcholska, A
Zacharias, M
Zajczyk, A
Zdziarski, AA
Zech, A
Zechlin, HS
Aleksic, J
Antonelli, LA
Antoranz, P
Backes, M
Barrio, JA
Bastieri, D
Gonzalez, JB
Bednarek, W
Berdyugin, A
Berger, K
Bernardini, E
Biland, A
Blanch, O
Bock, RK
Boller, A
Bonnoli, G
Tridon, DB
Braun, I
Bretz, T
Canellas, A
Carmona, E
Carosi, A
Colin, P
Colombo, E
Contreras, JL
Cortina, J
Cossio, L
Covino, S
Dazzi, F
De Angelis, A
del Pozo, ED
De Lotto, B
Mendez, CD
Ortega, AD
Doert, M
Dominguez, A
Prester, DD
Dorner, D
Doro, M
Elsaesser, D
Ferenc, D
Fonseca, MV
Font, L
Fruck, C
Lopez, RJG
Garczarczyk, M
Garrido, D
Giavitto, G
Godinovic, N
Hadasch, D
Hafner, D
Herrero, A
Hildebrand, D
Hohne-Monch, D
Hose, J
Hrupec, D
Huber, B
Jogler, T
Klepser, S
Krahenbuhl, T
Krause, J
La Barbera, A
Lelas, D
Leonardo, E
Lindfors, E
Lombardi, S
Lopez, M
Lorenz, E
Makariev, M
Maneva, G
Mankuzhiyil, N
Mannheim, K
Maraschi, L
Mariotti, M
Martinez, M
Mazin, D
Meucci, M
Miranda, JM
Mirzoyan, R
Miyamoto, H
Moldon, J
Moralejo, A
Munar, P
Nieto, D
Nilsson, K
Orito, R
Oya, I
Paneque, D
Paoletti, R
Pardo, S
Paredes, JM
Partini, S
Pasanen, M
Pauss, F
Perez-Torres, MA
Persic, M
Peruzzo, L
Pilia, M
Pochon, J
Prada, F
Moroni, PGP
Prandini, E
Puljak, I
Reichardt, I
Reinthal, R
Rhode, W
Ribo, M
Rico, J
Rugamer, S
Saggion, A
Saito, K
Saito, TY
Salvati, M
Satalecka, K
Scalzotto, V
Scapin, V
Schultz, C
Schweizer, T
Shayduk, M
Shore, SN
Sillanpaa, A
Sitarek, J
Sobczynska, D
Spanier, F
Spiro, S
Stamerra, A
Steinke, B
Storz, J
Strah, N
Suric, T
Takalo, L
Takami, H
Tavecchio, F
Temnikov, P
Terzic, T
Tescaro, D
Teshima, M
Thom, M
Tibolla, O
Torres, DF
Treves, A
Vankov, H
Vogler, P
Wagner, RM
Weitzel, Q
Zabalza, V
Zandanel, F
Zanin, R
Arlen, T
Aune, T
Beilicke, M
Benbow, W
Bouvier, A
Bradbury, SM
Buckley, JH
Bugaev, V
Byrum, K
Cannon, A
Cesarini, A
Ciupik, L
Connolly, MP
Cui, W
Dickherber, R
Duke, C
Errando, M
Falcone, A
Finley, JP
Finnegan, G
Fortson, L
Furniss, A
Galante, N
Gall, D
Godambe, S
Griffin, S
Grube, J
Gyuk, G
Hanna, D
Holder, J
Huan, H
Hui, CM
Kaaret, P
Karlsson, N
Kertzman, M
Khassen, Y
Kieda, D
Krawczynski, H
Krennrich, F
Lang, MJ
LeBohec, S
Maier, G
McArthur, S
McCann, A
Moriarty, P
Mukherjee, R
Nunez, PD
Ong, RA
Orr, M
Otte, AN
Park, N
Perkins, JS
Pichel, A
Pohl, M
Prokoph, H
Ragan, K
Reyes, LC
Reynolds, PT
Roache, E
Rose, HJ
Ruppel, J
Schroedter, M
Sembroski, GH
Senturk, GD
Telezhinsky, I
Tesic, G
Theiling, M
Thibadeau, S
Varlotta, A
Vassiliev, VV
Vivier, M
Wakely, SP
Weekes, TC
Williams, DA
Zitzer, B
de Almeida, UB
Cara, M
Casadio, C
Cheung, CC
McConville, W
Davies, F
Doi, A
Giovannini, G
Giroletti, M
Hada, K
Hardee, P
Harris, DE
Junor, W
Kino, M
Lee, NP
Ly, C
Madrid, J
Massaro, F
Mundell, CG
Nagai, H
Perlman, ES
Steele, IA
Walker, RC
Wood, DL
AF Abramowski, A.
Acero, F.
Aharonian, F.
Akhperjanian, A. G.
Anton, G.
Balzer, A.
Barnacka, A.
de Almeida, U. Barres
Becherini, Y.
Becker, J.
Behera, B.
Bernloehr, K.
Birsin, E.
Biteau, J.
Bochow, A.
Boisson, C.
Bolmont, J.
Bordas, P.
Brucker, J.
Brun, F.
Brun, P.
Bulik, T.
Buesching, I.
Carrigan, S.
Casanova, S.
Cerruti, M.
Chadwick, P. M.
Charbonnier, A.
Chaves, R. C. G.
Cheesebrough, A.
Clapson, A. C.
Coignet, G.
Cologna, G.
Conrad, J.
Dalton, M.
Daniel, M. K.
Davids, I. D.
Degrange, B.
Deil, C.
Dickinson, H. J.
Djannati-Atai, A.
Domainko, W.
Drury, L. O'C.
Dubus, G.
Dutson, K.
Dyks, J.
Dyrda, M.
Egberts, K.
Eger, P.
Espigat, P.
Fallon, L.
Farnier, C.
Fegan, S.
Feinstein, F.
Fernandes, M. V.
Fiasson, A.
Fontaine, G.
Foerster, A.
Fuessling, M.
Gallant, Y. A.
Gast, H.
Gerard, L.
Gerbig, D.
Giebels, B.
Glicenstein, J. F.
Glueck, B.
Goret, P.
Goering, D.
Haeffner, S.
Hague, J. D.
Hampf, D.
Hauser, M.
Heinz, S.
Heinzelmann, G.
Henri, G.
Hermann, G.
Hinton, J. A.
Hoffmann, A.
Hofmann, W.
Hofverberg, P.
Holler, M.
Horns, D.
Jacholkowska, A.
de Jager, O. C.
Jahn, C.
Jamrozy, M.
Jung, I.
Kastendieck, M. A.
Katarzynski, K.
Katz, U.
Kaufmann, S.
Keogh, D.
Khangulyan, D.
Khelifi, B.
Klochkov, D.
Kluzniak, W.
Kneiske, T.
Komin, Nu.
Kosack, K.
Kossakowski, R.
Laffon, H.
Lamanna, G.
Lennarz, D.
Lohse, T.
Lopatin, A.
Lu, C. -C.
Marandon, V.
Marcowith, A.
Masbou, J.
Maurin, D.
Maxted, N.
Mayer, M.
McComb, T. J. L.
Medina, M. C.
Mehault, J.
Moderski, R.
Moulin, E.
Naumann, C. L.
Naumann-Godo, M.
de Naurois, M.
Nedbal, D.
Nekrassov, D.
Nguyen, N.
Nicholas, B.
Niemiec, J.
Nolan, S. J.
Ohm, S.
Wilhelmi, E. de Ona
Opitz, B.
Ostrowski, M.
Oya, I.
Panter, M.
Arribas, M. Paz
Pedaletti, G.
Pelletier, G.
Petrucci, P. -O.
Pita, S.
Puehlhofer, G.
Punch, M.
Quirrenbach, A.
Raue, M.
Rayner, S. M.
Reimer, A.
Reimer, O.
Renaud, M.
de los Reyes, R.
Rieger, F.
Ripken, J.
Rob, L.
Rosier-Lees, S.
Rowell, G.
Rudak, B.
Rulten, C. B.
Ruppel, J.
Sahakian, V.
Sanchez, D. A.
Santangelo, A.
Schlickeiser, R.
Schoeck, F. M.
Schulz, A.
Schwanke, U.
Schwarzburg, S.
Schwemmer, S.
Sheidaei, F.
Skilton, J. L.
Sol, H.
Spengler, G.
Stawarz, L.
Steenkamp, R.
Stegmann, C.
Stinzing, F.
Stycz, K.
Sushch, I.
Szostek, A.
Tavernet, J. -P.
Terrier, R.
Tluczykont, M.
Valerius, K.
van Eldik, C.
Vasileiadis, G.
Venter, C.
Vialle, J. P.
Viana, A.
Vincent, P.
Voelk, H. J.
Volpe, F.
Vorobiov, S.
Vorster, M.
Wagner, S. J.
Ward, M.
White, R.
Wierzcholska, A.
Zacharias, M.
Zajczyk, A.
Zdziarski, A. A.
Zech, A.
Zechlin, H. -S.
Aleksic, J.
Antonelli, L. A.
Antoranz, P.
Backes, M.
Barrio, J. A.
Bastieri, D.
Becerra Gonzalez, J.
Bednarek, W.
Berdyugin, A.
Berger, K.
Bernardini, E.
Biland, A.
Blanch, O.
Bock, R. K.
Boller, A.
Bonnoli, G.
Tridon, D. Borla
Braun, I.
Bretz, T.
Canellas, A.
Carmona, E.
Carosi, A.
Colin, P.
Colombo, E.
Contreras, J. L.
Cortina, J.
Cossio, L.
Covino, S.
Dazzi, F.
De Angelis, A.
De Cea del Pozo, E.
De Lotto, B.
Delgado Mendez, C.
Diago Ortega, A.
Doert, M.
Dominguez, A.
Prester, D. Dominis
Dorner, D.
Doro, M.
Elsaesser, D.
Ferenc, D.
Fonseca, M. V.
Font, L.
Fruck, C.
Garcia Lopez, R. J.
Garczarczyk, M.
Garrido, D.
Giavitto, G.
Godinovic, N.
Hadasch, D.
Haefner, D.
Herrero, A.
Hildebrand, D.
Hoehne-Moench, D.
Hose, J.
Hrupec, D.
Huber, B.
Jogler, T.
Klepser, S.
Kraehenbuehl, T.
Krause, J.
La Barbera, A.
Lelas, D.
Leonardo, E.
Lindfors, E.
Lombardi, S.
Lopez, M.
Lorenz, E.
Makariev, M.
Maneva, G.
Mankuzhiyil, N.
Mannheim, K.
Maraschi, L.
Mariotti, M.
Martinez, M.
Mazin, D.
Meucci, M.
Miranda, J. M.
Mirzoyan, R.
Miyamoto, H.
Moldon, J.
Moralejo, A.
Munar, P.
Nieto, D.
Nilsson, K.
Orito, R.
Oya, I.
Paneque, D.
Paoletti, R.
Pardo, S.
Paredes, J. M.
Partini, S.
Pasanen, M.
Pauss, F.
Perez-Torres, M. A.
Persic, M.
Peruzzo, L.
Pilia, M.
Pochon, J.
Prada, F.
Moroni, P. G. Prada
Prandini, E.
Puljak, I.
Reichardt, I.
Reinthal, R.
Rhode, W.
Ribo, M.
Rico, J.
Ruegamer, S.
Saggion, A.
Saito, K.
Saito, T. Y.
Salvati, M.
Satalecka, K.
Scalzotto, V.
Scapin, V.
Schultz, C.
Schweizer, T.
Shayduk, M.
Shore, S. N.
Sillanpaa, A.
Sitarek, J.
Sobczynska, D.
Spanier, F.
Spiro, S.
Stamerra, A.
Steinke, B.
Storz, J.
Strah, N.
Suric, T.
Takalo, L.
Takami, H.
Tavecchio, F.
Temnikov, P.
Terzic, T.
Tescaro, D.
Teshima, M.
Thom, M.
Tibolla, O.
Torres, D. F.
Treves, A.
Vankov, H.
Vogler, P.
Wagner, R. M.
Weitzel, Q.
Zabalza, V.
Zandanel, F.
Zanin, R.
Arlen, T.
Aune, T.
Beilicke, M.
Benbow, W.
Bouvier, A.
Bradbury, S. M.
Buckley, J. H.
Bugaev, V.
Byrum, K.
Cannon, A.
Cesarini, A.
Ciupik, L.
Connolly, M. P.
Cui, W.
Dickherber, R.
Duke, C.
Errando, M.
Falcone, A.
Finley, J. P.
Finnegan, G.
Fortson, L.
Furniss, A.
Galante, N.
Gall, D.
Godambe, S.
Griffin, S.
Grube, J.
Gyuk, G.
Hanna, D.
Holder, J.
Huan, H.
Hui, C. M.
Kaaret, P.
Karlsson, N.
Kertzman, M.
Khassen, Y.
Kieda, D.
Krawczynski, H.
Krennrich, F.
Lang, M. J.
LeBohec, S.
Maier, G.
McArthur, S.
McCann, A.
Moriarty, P.
Mukherjee, R.
Nunez, P. D.
Ong, R. A.
Orr, M.
Otte, A. N.
Park, N.
Perkins, J. S.
Pichel, A.
Pohl, M.
Prokoph, H.
Ragan, K.
Reyes, L. C.
Reynolds, P. T.
Roache, E.
Rose, H. J.
Ruppel, J.
Schroedter, M.
Sembroski, G. H.
Sentuerk, G. D.
Telezhinsky, I.
Tesic, G.
Theiling, M.
Thibadeau, S.
Varlotta, A.
Vassiliev, V. V.
Vivier, M.
Wakely, S. P.
Weekes, T. C.
Williams, D. A.
Zitzer, B.
de Almeida, U. Barres
Cara, M.
Casadio, C.
Cheung, C. C.
McConville, W.
Davies, F.
Doi, A.
Giovannini, G.
Giroletti, M.
Hada, K.
Hardee, P.
Harris, D. E.
Junor, W.
Kino, M.
Lee, N. P.
Ly, C.
Madrid, J.
Massaro, F.
Mundell, C. G.
Nagai, H.
Perlman, E. S.
Steele, I. A.
Walker, R. C.
Wood, D. L.
CA HESS Collaboration
MAGIC Collaboration
VERITAS Collaboration
TI THE 2010 VERY HIGH ENERGY gamma-RAY FLARE AND 10 YEARS OF
MULTI-WAVELENGTH OBSERVATIONS OF M 87
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: active; galaxies: individual (M 87); galaxies: jets; galaxies:
nuclei; gamma rays: galaxies; radiation mechanisms: non-thermal
ID ACTIVE GALACTIC NUCLEI; LARGE-AREA TELESCOPE; SUPERMASSIVE BLACK-HOLE;
RADIO GALAXY M87; BASE-LINE ARRAY; TEV EMISSION; CRAB-NEBULA; UNIFIED
SCHEMES; SCALE JETS; INNER JET
AB The giant radio galaxy M 87 with its proximity (16 Mpc), famous jet, and very massive black hole ((3-6) x 10(9) M-circle dot) provides a unique opportunity to investigate the origin of very high energy (VHE; E > 100 GeV) gamma-ray emission generated in relativistic outflows and the surroundings of supermassive black holes. M 87 has been established as a VHE gamma-ray emitter since 2006. The VHE gamma-ray emission displays strong variability on timescales as short as a day. In this paper, results from a joint VHE monitoring campaign on M 87 by the MAGIC and VERITAS instruments in 2010 are reported. During the campaign, a flare at VHE was detected triggering further observations at VHE (H.E.S.S.), X-rays (Chandra), and radio (43 GHz Very Long Baseline Array, VLBA). The excellent sampling of the VHE gamma-ray light curve enables one to derive a precise temporal characterization of the flare: the single, isolated flare is well described by a two-sided exponential function with significantly different flux rise and decay times of tau(rise)(d) = (1.69 +/- 0.30) days and tau(decay)(d) = (0.611 +/- 0.080) days, respectively. While the overall variability pattern of the 2010 flare appears somewhat different from that of previous VHE flares in 2005 and 2008, they share very similar timescales (similar to day), peak fluxes (Phi(>0.35 TeV) similar or equal to (1-3) x 10(-11) photons cm(-2) s(-1)), and VHE spectra. VLBA radio observations of 43 GHz of the inner jet regions indicate no enhanced flux in 2010 in contrast to observations in 2008, where an increase of the radio flux of the innermost core regions coincided with a VHE flare. On the other hand, Chandra X-ray observations taken similar to 3 days after the peak of the VHE gamma-ray emission reveal an enhanced flux from the core (flux increased by factor similar to 2; variability timescale <2 days). The long-term (2001-2010) multi-wavelength (MWL) light curve of M 87, spanning from radio to VHE and including data from Hubble Space Telescope, Liverpool Telescope, Very Large Array, and European VLBI Network, is used to further investigate the origin of the VHE gamma-ray emission. No unique, common MWL signature of the three VHE flares has been identified. In the outer kiloparsec jet region, in particular in HST-1, no enhanced MWL activity was detected in 2008 and 2010, disfavoring it as the origin of the VHE flares during these years. Shortly after two of the three flares (2008 and 2010), the X-ray core was observed to be at a higher flux level than its characteristic range (determined from more than 60 monitoring observations: 2002-2009). In 2005, the strong flux dominance of HST-1 could have suppressed the detection of such a feature. Published models for VHE gamma-ray emission from M 87 are reviewed in the light of the new data.
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RP Abramowski, A (reprint author), Univ Hamburg, Inst Expt Phys, Luruper Chaussee 149, D-22761 Hamburg, Germany.
EM martin.raue@desy.de; stawarz@astro.isas.jaxa.jp; colin@mppmu.mpg.de;
mazin@ifae.es; beilicke@physics.wustl.edu; cmhui@physics.utah.edu
RI Braun, Isabel/C-9373-2012; Prada Moroni, Pier Giorgio/G-5565-2011;
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Tjus, Julia/G-8145-2012; Fontaine, Gerard/D-6420-2014; Venter,
Christo/E-6884-2011; Rico, Javier/K-8004-2014; Fernandez,
Ester/K-9734-2014; Lopez Moya, Marcos/L-2304-2014; Moralejo Olaizola,
Abelardo/M-2916-2014; Ribo, Marc/B-3579-2015; Katarzynski,
Krzysztof/G-4528-2014; Jamrozy, Marek/F-4507-2015; Casanova,
Sabrina/J-8935-2013; Antoranz, Pedro/H-5095-2015; Anton,
Gisela/C-4840-2013; Khassen, Yerbol/I-3806-2015; Delgado,
Carlos/K-7587-2014; Nieto, Daniel/J-7250-2015; Miranda, Jose
Miguel/F-2913-2013; Daniel, Michael/A-2903-2010; Font,
Lluis/L-4197-2014; Contreras Gonzalez, Jose Luis/K-7255-2014; Maneva,
Galina/L-7120-2016; Temnikov, Petar/L-6999-2016; Massaro,
Francesco/L-9102-2016; Makariev, Martin/M-2122-2016; Backes,
Michael/N-5126-2016; Torres, Diego/O-9422-2016; Reichardt,
Ignasi/P-7478-2016; Drury, Luke/B-1916-2017; Barrio, Juan/L-3227-2014;
Moulin, Emmanuel/B-5959-2017; Martinez Rodriguez, Manel/C-2539-2017;
Cortina, Juan/C-2783-2017; Fonseca Gonzalez, Maria Victoria/I-2004-2015;
Komin, Nukri/J-6781-2015;
OI Braun, Isabel/0000-0002-9389-0502; Reimer, Olaf/0000-0001-6953-1385; van
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Lopez Moya, Marcos/0000-0002-8791-7908; Moralejo Olaizola,
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Antoranz, Pedro/0000-0002-3015-3601; Anton, Gisela/0000-0003-2039-4724;
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Lotto, Barbara/0000-0003-3624-4480
FU Namibian authorities; German Ministry for Education and Research (BMBF);
Max Planck Society; French Ministry for Research; CNRS-IN2P3; CNRS; U.K.
Science and Technology Facilities Council (STFC); IPNP of the Charles
University; Polish Ministry of Science and Higher Education; South
African Department of Science and Technology; National Research
Foundation; University of Namibia; German BMBF; German MPG; Italian
INFN; Swiss National Fund SNF; Spanish MICINN; Bulgarian NSF
[CSD2007-00042, CSD2009-00064, DO02-353]; Academy of Finland [127740];
YIP of the Helmholtz Gemeinschaft; DFG Cluster of Excellence "Origin and
Structure of the Universe,"; DFG Collaborative Research Centers
[SFB823/C4, SFB876/C3]; Polish MNiSzW [745/N-HESS-MAGIC/2010/0]; US
Department of Energy Office of Science; US National Science Foundation;
Smithsonian Institution; NSERC in Canada; Science Foundation Ireland
(SFI) [10/RFP/AST2748]; STFC in the UK; Istituto Nazionale di
Astrofisica in Italy; Centre National d'Etudes Spatiales in France; NASA
[GO0-11120X]; Associated Universities, Inc.; European Community [227290]
FX The H.E.S.S. Collaboration acknowledges support of the Namibian
authorities and of the University of Namibia in facilitating the
construction and operation of H.E.S.S., as is the support by the German
Ministry for Education and Research (BMBF), the Max Planck Society, the
French Ministry for Research, the CNRS-IN2P3 and the Astroparticle
Interdisciplinary Programme of the CNRS, the U.K. Science and Technology
Facilities Council (STFC), the IPNP of the Charles University, the
Polish Ministry of Science and Higher Education, the South African
Department of Science and Technology and National Research Foundation,
and by the University of Namibia. We appreciate the excellent work of
the technical support staff in Berlin, Durham, Hamburg, Heidelberg,
Palaiseau, Paris, Saclay, and in Namibia in the construction and
operation of the equipment.; The MAGIC Collaboration thank the Instituto
de Astrofisica de Canarias for the excellent working conditions at the
Observatorio del Roque de los Muchachos in La Palma. The support of the
German BMBF and MPG, the Italian INFN, the Swiss National Fund SNF, and
the Spanish MICINN is gratefully acknowledged. This work was also
supported by the Marie Curie program, by the CPAN CSD2007-00042 and
MultiDark CSD2009-00064 projects of the Spanish Consolider-Ingenio 2010
programme, by grant DO02-353 of the Bulgarian NSF, by grant 127740 of
the Academy of Finland, by the YIP of the Helmholtz Gemeinschaft, by the
DFG Cluster of Excellence "Origin and Structure of the Universe," by the
DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, and by the
Polish MNiSzW grant 745/N-HESS-MAGIC/2010/0.; The VERITAS Collaboration
acknowledges support from the US Department of Energy Office of Science,
the US National Science Foundation, and the Smithsonian Institution,
from NSERC in Canada, from Science Foundation Ireland (SFI
10/RFP/AST2748), and from STFC in the UK. We acknowledge the excellent
work of the technical support staff at the FLWO and at the collaborating
institutions in the construction and operation of the instrument.; The
Fermi LAT Collaboration acknowledges generous ongoing support from a
number of agencies and institutes that have supported both the
development and the operation of the LAT as well as scientific data
analysis. These include the National Aeronautics and Space
Administration and the Department of Energy in the United States, the
Commissariat a l'Energie Atomique and the Centre National de la
Recherche Scientifique/Institut National de Physique Nucleaire et de
Physique des Particules in France, the Agenzia Spaziale Italiana and the
Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of
Education, Culture, Sports, Science and Technology (MEXT), High Energy
Accelerator Research Organization (KEK) and Japan Aerospace Exploration
Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish
Research Council and the Swedish National Space Board in Sweden.
Additional support for science analysis during the operations phase is
gratefully acknowledged from the Istituto Nazionale di Astrofisica in
Italy and the Centre National d'Etudes Spatiales in France.; Analysis of
the Chandra data was supported by NASA grant GO0-11120X.; The Very Long
Baseline Array is operated by the National Radio Astronomy Observatory,
a facility of the NSF, operated under cooperative agreement by
Associated Universities, Inc.; The European VLBI Network is a joint
facility of European, Chinese, South African, and other radio astronomy
institutes funded by their national research councils. This effort is
supported by the European Community Framework Programme 7, Advanced
Radio Astronomy in Europe, grant agreement no. 227290.
NR 107
TC 59
Z9 61
U1 3
U2 42
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 FEB 20
PY 2012
VL 746
IS 2
AR 151
DI 10.1088/0004-637X/746/2/151
PG 18
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 894DD
UT WOS:000300406300037
ER
PT J
AU Efroimsky, M
AF Efroimsky, Michael
TI TIDAL DISSIPATION COMPARED TO SEISMIC DISSIPATION: IN SMALL BODIES,
EARTHS, AND SUPER-EARTHS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE celestial mechanics; Earth; Moon; planet-star interactions; planets and
satellites: dynamical evolution and stability; planets and satellites:
general
ID WAVE ATTENUATION; GRAVITATIONAL MOTION; MANTLE; CONSTRAINTS; DISPERSION;
EQUATIONS; EVOLUTION; CORE; BODY; MARS
AB While the seismic quality factor and phase lag are defined solely by the bulk properties of the mantle, their tidal counterparts are determined by both the bulk properties and the size effect (self-gravitation of a body as a whole). For a qualitative estimate, we model the body with a homogeneous sphere, and express the tidal phase lag through the lag in a sample of material. Although simplistic, our model is sufficient to understand that the lags are not identical. The difference emerges because self-gravitation pulls the tidal bulge down. At low frequencies, this reduces strain and the damping rate, making tidal damping less efficient in larger objects. At higher frequencies, competition between self-gravitation and rheology becomes more complex, though for sufficiently large super-Earths the same rule applies: the larger the planet, the weaker the tidal dissipation in it. Being negligible for small terrestrial planets and moons, the difference between the seismic and tidal lagging (and likewise between the seismic and tidal damping) becomes very considerable for large exoplanets (super-Earths). In those, it is much lower than what one might expect from using a seismic quality factor. The tidal damping rate deviates from the seismic damping rate, especially in the zero-frequency limit, and this difference takes place for bodies of any size. So the equal in magnitude but opposite in sign tidal torques, exerted on one another by the primary and the secondary, have their orbital averages going smoothly through zero as the secondary crosses the synchronous orbit. We describe the mantle rheology with the Andrade model, allowing it to lean toward the Maxwell model at the lowest frequencies. To implement this additional flexibility, we reformulate the Andrade model by endowing it with a free parameter zeta which is the ratio of the anelastic timescale to the viscoelastic Maxwell time of the mantle. Some uncertainty in this parameter's frequency dependence does not influence our principal conclusions.
C1 USN Observ, Washington, DC 20392 USA.
RP Efroimsky, M (reprint author), USN Observ, Washington, DC 20392 USA.
EM michael.efroimsky@usno.navy.mil
OI Efroimsky, Michael/0000-0003-1249-9622
NR 43
TC 43
Z9 43
U1 0
U2 9
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 FEB 20
PY 2012
VL 746
IS 2
AR 150
DI 10.1088/0004-637X/746/2/150
PG 20
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 894DD
UT WOS:000300406300036
ER
PT J
AU Hwang, U
Laming, JM
AF Hwang, Una
Laming, J. Martin
TI A CHANDRA X-RAY SURVEY OF EJECTA IN THE CASSIOPEIA A SUPERNOVA REMNANT
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE hydrodynamics; ISM: individual objects (Cassiopeia A); ISM: supernova
remnants; X-rays: ISM
ID CORE-COLLAPSE SUPERNOVAE; ISOLATED RADIO PULSARS; A SUPERNOVA;
NEUTRON-STAR; 3-DIMENSIONAL STRUCTURE; ACCELERATED ELECTRONS; GAMMA-RAY;
CAS-A; INTERSTELLAR-MEDIUM; DRIVEN SUPERNOVA
AB We present a survey of the X-ray-emitting ejecta in the Cassiopeia A supernova remnant (SNR) based on an extensive analysis of over 6000 spectral regions extracted on 2.'' 5-10 '' angular scales using the Chandra 1 Ms observation. We interpret these results in the context of hydrodynamical models for the evolution of the remnant. The distributions of fitted temperature and ionization age, and the implied mass coordinates, are highly peaked and suggest that the ejecta were subjected to multiple secondary shocks following reverse shock interaction with ejecta inhomogeneities. Based on the fitted emission measure and element abundances, and an estimate of the emitting volume, we derive masses for the X-ray-emitting ejecta and also show the distribution of the mass of various elements over the remnant. An upper limit to the total shocked Fe mass visible in X-rays appears to be roughly 0.13 M-circle dot, which accounts for nearly all of the mass expected in Fe ejecta. We find two populations of Fe ejecta, that associated with normal Si burning and that possibly associated with alpha-rich freezeout, with a mass ratio of approximately 2:1. Essentially all of the observed Fe (both components) lies well outside the central regions of the SNR, possibly having been ejected by hydrodynamic instabilities during the explosion. We discuss this and its implications for the neutron star kick.
C1 [Hwang, Una] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Hwang, Una] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21210 USA.
[Laming, J. Martin] USN, Res Lab, Washington, DC 20375 USA.
RP Hwang, U (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM Una.Hwang-1@gsfc.nasa.gov; laming@nrl.navy.mil
FU NASA [NNH04ZSS001N]; Office of Naval Research
FX We thank Roger Chevalier, Elisabetta Micelotta, Rob Petre, and the
referee for helpful comments on the paper. We gratefully acknowledge
support through NASA grants to the Chandra Guest Observer Program and
NNH04ZSS001N to the Long Term Space Astrophysics Program. J.M.L. was
also supported by basic research funds of the Office of Naval Research.
NR 109
TC 68
Z9 68
U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 20
PY 2012
VL 746
IS 2
AR 130
DI 10.1088/0004-637X/746/2/130
PG 18
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 894DD
UT WOS:000300406300016
ER
PT J
AU Winebarger, AR
Warren, HP
Schmelz, JT
Cirtain, J
Mulu-Moore, F
Golub, L
Kobayashi, K
AF Winebarger, Amy R.
Warren, Harry P.
Schmelz, Joan T.
Cirtain, Jonathan
Mulu-Moore, Fana
Golub, Leon
Kobayashi, Ken
TI DEFINING THE "BLIND SPOT" OF HINODE EIS AND XRT TEMPERATURE MEASUREMENTS
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE Sun: corona
ID X-RAY TELESCOPE; DIFFERENTIAL EMISSION MEASURE; ACTIVE-REGION; PLASMA;
LINES; DIAGNOSTICS; LOOPS; FLARE
AB Observing high-temperature, low emission measure plasma is key to unlocking the coronal heating problem. With current instrumentation, a combination of EUV spectral data from Hinode Extreme-ultraviolet Imaging Spectrometer (EIS; sensitive to temperatures up to 4 MK) and broadband filter data from Hinode X-ray Telescope (XRT; sensitive to higher temperatures) is typically used to diagnose the temperature structure of the observed plasma. In this Letter, we demonstrate that a "blind spot" exists in temperature-emission measure space for combined Hinode EIS and XRT observations. For a typical active region core with significant emission at 3-4 MK, Hinode EIS and XRT are insensitive to plasma with temperatures greater than similar to 6 MK and emission measures less than similar to 10(27) cm(-5). We then demonstrate that the temperature and emission measure limits of this blind spot depend upon the temperature distribution of the plasma along the line of sight by considering a hypothetical emission measure distribution sharply peaked at 1 MK. For this emission measure distribution, we find that EIS and XRT are insensitive to plasma with emission measures less than similar to 10(26) cm(-5). We suggest that a spatially and spectrally resolved 6-24 angstrom spectrum would improve the sensitivity to these high-temperature, low emission measure plasma.
C1 [Winebarger, Amy R.; Cirtain, Jonathan; Mulu-Moore, Fana] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
[Warren, Harry P.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Schmelz, Joan T.] Univ Memphis, Dept Phys, Memphis, TN 38152 USA.
[Golub, Leon] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
[Kobayashi, Ken] Ctr Space Plasma & Aeron Res, Huntsville, AL 35805 USA.
RP Winebarger, AR (reprint author), NASA, George C Marshall Space Flight Ctr, VP 62, Huntsville, AL 35812 USA.
EM amy.r.winebarger@nasa.gov
OI Golub, Leon/0000-0001-9638-3082
NR 23
TC 22
Z9 22
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD FEB 20
PY 2012
VL 746
IS 2
AR L17
DI 10.1088/2041-8205/746/2/L17
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 896ZT
UT WOS:000300611100004
ER
PT J
AU Helmboldt, JF
Lazio, TJW
Intema, HT
Dymond, KF
AF Helmboldt, J. F.
Lazio, T. J. W.
Intema, H. T.
Dymond, K. F.
TI A new technique for spectral analysis of ionospheric TEC fluctuations
observed with the Very Large Array VHF system: From QP echoes to MSTIDs
SO RADIO SCIENCE
LA English
DT Article
ID NIGHTTIME MIDLATITUDE IONOSPHERE; SPORADIC-E EXPERIMENT; INSTABILITY
AB We have used a relatively long, contiguous VHF observation of a bright cosmic radio source (Cygnus A) with the Very Large Array (VLA) through the nighttime, midlatitude ionosphere to demonstrate the phenomena observable with this instrument. In a companion paper, we showed that the VLA can detect fluctuations in total electron content (TEC) with amplitudes of <= 10(-3) TECU and can measure TEC gradients with a precision of about 2 x 10(-4) TECU km(-1). We detail two complementary techniques for producing spectral analysis of these TEC gradient measurements. The first is able to track individual waves with wavelengths of about half the size of the array (similar to 20 km) or more. This technique was successful in detecting and characterizing many medium-scale traveling ionospheric disturbances (MSTIDs) seen intermittently throughout the night and has been partially validated using concurrent GPS measurements. Smaller waves are also seen with this technique at nearly all times, many of which move in similar directions as the detected MSTIDs. The second technique allows for the detection and statistical description of the properties of groups of waves moving in similar directions with wavelengths as small as 5 km. Combining the results of both spectral techniques, we found a class of intermediate and small scale waves which are likely the quasi-periodic (QP) echoes that have been observed to occur within sporadic-E (E-s) layers. We find two distinct populations of these waves. The members of one population are coincident in time with MSTIDs and are consistent with being generated within E-s layers by the E-F coupling instability. The other population seems more influenced by the neutral wind, similar to the predominant types of QP echoes found by the Sporadic-E Experiments over Kyushu (SEEK). We have also found that the spectra of background (i.e., isotropic) fluctuations can be interpreted as the sum of two turbulent components with maximum scales of about 300 km and 10 km.
C1 [Helmboldt, J. F.; Dymond, K. F.] USN, Res Lab, Washington, DC 20375 USA.
[Lazio, T. J. W.] CALTECH, Jet Prop Lab, Pasadena, CA 91106 USA.
[Intema, H. T.] Natl Radio Astron Observ, Charlottesville, VA 22903 USA.
RP Helmboldt, JF (reprint author), USN, Res Lab, Code 7213,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM joe.helmboldt@nrl.navy.mil; joseph.lazio@jpl.nasa.gov; hintema@nrao.edu;
kenneth.dymond@nrl.navy.mil
RI Helmboldt, Joseph/C-8105-2012; Intema, Huib/D-1438-2012;
OI Intema, Huib/0000-0002-5880-2730; Dymond, Kenneth/0000-0001-8060-9016
FU National Aeronautics and Space Administration
FX The authors would like to thank the referees for useful comments and
suggestions. Basic research in astronomy at the Naval Research
Laboratory is supported by 6.1 base funding. The VLA was operated by the
National Radio Astronomy Observatory which is a facility of the National
Science Foundation operated under cooperative agreement by Associated
Universities, Inc. Part of this research was carried out at the Jet
Propulsion Laboratory, California Institute of Technology, under a
contract with the National Aeronautics and Space Administration.
NR 26
TC 17
Z9 17
U1 1
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0048-6604
EI 1944-799X
J9 RADIO SCI
JI Radio Sci.
PD FEB 18
PY 2012
VL 47
AR RS0L02
DI 10.1029/2011RS004787
PG 21
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
GA 899PE
UT WOS:000300827500001
ER
PT J
AU Robertson, K
Furukawa, Y
Underwood, A
Black, L
Liu, JL
AF Robertson, Kelly
Furukawa, Yoko
Underwood, Alison
Black, Lindsay
Liu, Jinny L.
TI Deletion of the Hoc and Soc capsid proteins affects the surface and
cellular uptake properties of bacteriophage T4 derived nanoparticles
SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
LA English
DT Article
DE T4 NPs; Hoc; Soc; Zeta potentials; Cellular uptake
ID MOLECULAR ARCHITECTURE; HEAD; PARTICLES; PHAGE-T4; DELIVERY; DOMAINS
AB Recently the use of engineered viral scaffolds in biotechnology and medical applications has been increasing dramatically. T4 phage capsid derived nanoparticles (NPs) have potential advantages as sensors and in biotechnology. These applications require that the physical properties and cellular uptake of these NPs be understood. In this study we used a T4 deletion mutant to investigate the effects of removing both the Hoc and Soc proteins from the capsid surface on T4 tailless NPs. The surface charge, zeta potential, size, and cellular uptake efficiencies for both the T4 NP and T4 Delta Hoc Delta Soc NP mutant were measured and compared using dynamic light scattering and flow cytometry and significant differences were detected. Published by Elsevier Inc.
C1 [Robertson, Kelly; Liu, Jinny L.] USN, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC 20375 USA.
[Furukawa, Yoko] USN, Res Lab, Seafloor Sci Branch, Stennis Space Ctr, Stennis Space Ctr, MS 39529 USA.
[Black, Lindsay] Univ Maryland, Sch Med, Dept Biochem, Baltimore, MD 21230 USA.
RP Liu, JL (reprint author), USN, Res Lab, Ctr Bio Mol Sci & Engn, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM jinny.liu@nrl.navy.mil
RI Furukawa, Yoko/B-3099-2013
FU NRL
FX We thank Drs. Patricia Legler and Stella North for their comments on the
manuscript. This work is supported by NRL 6.2 base program. The opinions
expressed here are those of authors and do not represent those of the US
Navy, the US Department of Defense, or the US government.
NR 21
TC 4
Z9 4
U1 0
U2 4
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0006-291X
J9 BIOCHEM BIOPH RES CO
JI Biochem. Biophys. Res. Commun.
PD FEB 17
PY 2012
VL 418
IS 3
BP 537
EP 540
DI 10.1016/j.bbrc.2012.01.061
PG 4
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 900XL
UT WOS:000300925300017
PM 22285187
ER
PT J
AU Weidinger, D
Houchins, C
Owrutsky, JC
AF Weidinger, Daniel
Houchins, Cassidy
Owrutsky, Jeffrey C.
TI Vibrational dynamics of tricyanomethanide
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID TEMPERATURE IONIC LIQUIDS; SOLAR-CELLS; ENERGY RELAXATION; DICYANAMIDE
ANION; POLAR-SOLVENTS; CYANIDE ION; PSEUDOHALIDES; SPECTROSCOPY;
EQUILIBRIUM; CONVERSION
AB Steady-state and time resolved IR spectroscopy have been used to characterize vibrational spectra and relaxation dynamics of the antisymmetric CN stretching band of tricyanomethanide (TCM) in solutions of water, heavy water, methanol, dimethyl sulfoxide, formamide, and the ionic liquid 1-butyl-3-methyl-imidazolium tetrafluoroborate [BMIM][BF4]. The vibrational energy relaxation times for tricyanomethanide in these solvents are longer than those previously reported for dicyanamide, another CN containing anion, in the same solvents. Results of ab initio calculations of the vibrational frequencies for tricyanomethanide depend on the method used and compare favorably with experimentally measured values for IR-active and Raman-active bands. Proton and electron affinities were also calculated. (C) 2012 Elsevier B. V. All rights reserved.
C1 [Weidinger, Daniel; Owrutsky, Jeffrey C.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
[Houchins, Cassidy] SRA Int, Fairfax, VA 22033 USA.
RP Owrutsky, JC (reprint author), USN, Res Lab, Div Chem, Code 6111,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM Jeff.Owrutsky@nrl.navy.mil
RI Owrutsky, Jeffrey/K-7649-2012
FU Office of Naval Research through the Naval Research Laboratory; National
Research Council
FX Support for this work was provided by the Office of Naval Research
through the Naval Research Laboratory. D.W. and C.H. thank the National
Research Council for fellowship support. The authors thank Michael B.
Pomfret for assistance in collecting Raman spectra.
NR 31
TC 6
Z9 6
U1 2
U2 25
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD FEB 16
PY 2012
VL 525-26
BP 60
EP 63
DI 10.1016/j.cplett.2011.12.060
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 891OG
UT WOS:000300225900010
ER
PT J
AU Gomez, RM
Nedoluha, GE
Neal, HL
McDermid, IS
AF Gomez, R. Michael
Nedoluha, Gerald E.
Neal, Helen L.
McDermid, I. Stuart
TI The fourth-generation Water Vapor Millimeter-Wave Spectrometer
SO RADIO SCIENCE
LA English
DT Article
ID MIDDLE ATMOSPHERE; RADIOMETER
AB For 20 years the Naval Research Laboratory has been making continuous water vapor profile measurements at 22.235 GHz with the Water Vapor Millimeter-Wave Spectrometer (WVMS) instruments, with the program expanding from one to three instruments in the first 6 years. Since the initial deployments there have been gradual improvements in the instrument design which have improved data quality and reduced maintenance requirements. Recent technological developments have made it possible to entirely redesign the instrument and improve not only the quality of the measurements but also the capability of the instrument. We present the fourth-generation instrument now operating at Table Mountain, California, which incorporates the most recent advances in microwave radiometry. This instrument represents the most significant extension of our measurement capability to date, enabling us to measure middle atmospheric water vapor from similar to 26-80 km.
C1 [Gomez, R. Michael; Nedoluha, Gerald E.] USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA.
[Neal, Helen L.] Computat Phys Inc, Springfield, VA 22151 USA.
[McDermid, I. Stuart] Jet Prop Lab, Table Mt Facil, Wrightwood, CA 92397 USA.
RP Gomez, RM (reprint author), USN, Remote Sensing Div, Res Lab, Code 7227,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM mike.gomez@nrl.navy.mil
FU Mauna Loa Observatory; NASA; Naval Research Laboratory; staff at the
Table Mountain Facility
FX We wish to thank the staff at the Table Mountain Facility and the Mauna
Loa Observatory for their assistance and support. This work is sponsored
by NASA under the Upper Atmosphere Research Program and the Naval
Research Laboratory.
NR 12
TC 3
Z9 3
U1 1
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0048-6604
J9 RADIO SCI
JI Radio Sci.
PD FEB 16
PY 2012
VL 47
AR RS1010
DI 10.1029/2011RS004778
PG 11
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
GA 899PC
UT WOS:000300827300001
ER
PT J
AU Helmboldt, JF
Lazio, TJW
Intema, HT
Dymond, KF
AF Helmboldt, J. F.
Lazio, T. J. W.
Intema, H. T.
Dymond, K. F.
TI High-precision measurements of ionospheric TEC gradients with the Very
Large Array VHF system
SO RADIO SCIENCE
LA English
DT Article
AB We have used a relatively long, contiguous VHF observation of a bright cosmic radio source (Cygnus A) with the Very Large Array (VLA) to demonstrate the capability of this instrument to study the ionosphere. This interferometer, and others like it, can observe ionospheric total electron content (TEC) fluctuations on a much wider range of scales than is possible with many other instruments. We have shown that with a bright source, the VLA can measure differential TEC values between pairs of antennas (delta TEC) with a precision of 3 x 10(-4) TECU. Here, we detail the data reduction and processing techniques used to achieve this level of precision. In addition, we demonstrate techniques for exploiting these high-precision delta TEC measurements to compute the TEC gradient observed by the array as well as small-scale fluctuations within the TEC gradient surface. A companion paper details specialized spectral analysis techniques used to characterize the properties of wave-like fluctuations within this data.
C1 [Helmboldt, J. F.; Dymond, K. F.] USN, Res Lab, Washington, DC 20375 USA.
[Lazio, T. J. W.] CALTECH, Jet Prop Lab, Pasadena, CA 91106 USA.
[Intema, H. T.] Natl Radio Astron Observ, Charlottesville, VA 22903 USA.
RP Helmboldt, JF (reprint author), USN, Res Lab, Code 7213,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM joe.helmboldt@nrl.navy.mil; joseph.lazio@jpl.nasa.gov; hintema@nrao.edu;
kenneth.dymond@nrl.navy.mil
RI Helmboldt, Joseph/C-8105-2012; Intema, Huib/D-1438-2012
OI Intema, Huib/0000-0002-5880-2730
FU 6.1 base funding; National Aeronautics and Space Administration
FX The authors would like to thank the referees for useful comments and
suggestions. Basic research in astronomy at the Naval Research
Laboratory is supported by 6.1 base funding. The VLA was operated by the
National Radio Astronomy Observatory which is a facility of the National
Science Foundation operated under cooperative agreement by Associated
Universities, Inc. Part of this research was carried out at the Jet
Propulsion Laboratory, California Institute of Technology, under a
contract with the National Aeronautics and Space Administration.
NR 16
TC 10
Z9 10
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0048-6604
J9 RADIO SCI
JI Radio Sci.
PD FEB 16
PY 2012
VL 47
AR RS0K02
DI 10.1029/2011RS004883
PG 13
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences; Remote Sensing; Telecommunications
GA 899PC
UT WOS:000300827300002
ER
PT J
AU Ohta, T
Beechem, TE
Robinson, JT
Kellogg, GL
AF Ohta, Taisuke
Beechem, Thomas E.
Robinson, Jeremy T.
Kellogg, G. L.
TI Long-range atomic ordering and variable interlayer interactions in two
overlapping graphene lattices with stacking misorientations
SO PHYSICAL REVIEW B
LA English
DT Article
ID EPITAXIAL GRAPHENE; BORON-NITRIDE; ELECTRONS; BILAYER; LAYERS
AB The low-energy electronic dispersion of graphene is extremely sensitive to the nearest layer interaction and thus the stacking sequence. Here, we report a method to examine the effect of stacking misorientation in bilayer graphene by transferring chemical vapor deposited (CVD) graphene onto monolithic graphene epitaxially grown on silicon carbide (SiC) (0001). The resulting hybrid bilayer graphene displays long-range Moire diffraction patterns having various misorientations even as it exhibits electron reflectivity spectra nearly identical to epitaxial bilayer graphene grown directly on SiC. These varying twist angles affect the 2D (G')-band shape of the Raman spectrum, indicating regions of both a monolayer-like single pi state and Bernal-like split pi states brought about by the differing interlayer interactions. This hybrid bilayer graphene fabricated via a transfer process therefore offers a way to systematically study the electronic properties of bilayer graphene films as a function of stacking misorientation angle.
C1 [Ohta, Taisuke; Beechem, Thomas E.; Kellogg, G. L.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Robinson, Jeremy T.] USN, Res Lab, Washington, DC 20375 USA.
RP Ohta, T (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM tohta@sandia.gov
RI Robinson, Jeremy/F-2748-2010
FU Laboratory Directed Research and Development; US Department of Energy
(DOE) Office of Basic Energy Sciences, Division of Materials Science and
Engineering; US Department of Energy's National Nuclear Security
Administration [DE-AC04-94AL85000]; Office of Naval Research
FX The work at Sandia National Laboratories was supported by Laboratory
Directed Research and Development and by the US Department of Energy
(DOE) Office of Basic Energy Sciences, Division of Materials Science and
Engineering. A portion of this work was performed at CINT, a US DOE
Office of Basic Energy Sciences user facility. Sandia National
Laboratories is a multiprogram laboratory managed and operated by Sandia
Corporation, a wholly owned subsidiary of Lockheed Martin Corporation,
for the US Department of Energy's National Nuclear Security
Administration under contract DE-AC04-94AL85000. We are grateful to
Guild Copeland and Anthony McDonald for sample preparation and
characterization. The work at Naval Research Laboratory was funded by
the Office of Naval Research. We are also grateful to Glen G. Jurnigan
and coworkers at NRL for sharing their manuscript prior to
publication.45
NR 44
TC 17
Z9 17
U1 2
U2 43
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 FEB 16
PY 2012
VL 85
IS 7
AR 075415
DI 10.1103/PhysRevB.85.075415
PG 7
WC Physics, Condensed Matter
SC Physics
GA 894ID
UT WOS:000300419500001
ER
PT J
AU Delorme, A
Palmer, J
Onton, J
Oostenveld, R
Makeig, S
AF Delorme, Arnaud
Palmer, Jason
Onton, Julie
Oostenveld, Robert
Makeig, Scott
TI Independent EEG Sources Are Dipolar
SO PLOS ONE
LA English
DT Article
ID BLIND SOURCE SEPARATION; EVENT-RELATED POTENTIALS; COMPONENT ANALYSIS;
VISUAL-CORTEX; ELECTROENCEPHALOGRAPHIC DATA; NEURONAL AVALANCHES;
WORKING-MEMORY; BRAIN SOURCES; RESPONSES; DYNAMICS
AB Independent component analysis (ICA) and blind source separation (BSS) methods are increasingly used to separate individual brain and non-brain source signals mixed by volume conduction in electroencephalographic (EEG) and other electrophysiological recordings. We compared results of decomposing thirteen 71-channel human scalp EEG datasets by 22 ICA and BSS algorithms, assessing the pairwise mutual information (PMI) in scalp channel pairs, the remaining PMI in component pairs, the overall mutual information reduction (MIR) effected by each decomposition, and decomposition 'dipolarity' defined as the number of component scalp maps matching the projection of a single equivalent dipole with less than a given residual variance. The least well-performing algorithm was principal component analysis (PCA); best performing were AMICA and other likelihood/mutual information based ICA methods. Though these and other commonly-used decomposition methods returned many similar components, across 18 ICA/BSS algorithms mean dipolarity varied linearly with both MIR and with PMI remaining between the resulting component time courses, a result compatible with an interpretation of many maximally independent EEG components as being volume-conducted projections of partially-synchronous local cortical field activity within single compact cortical domains. To encourage further method comparisons, the data and software used to prepare the results have been made available (http://sccn.ucsd.edu/wiki/BSSComparison).
C1 [Delorme, Arnaud; Palmer, Jason; Onton, Julie; Makeig, Scott] Univ Calif San Diego, Swartz Ctr Computat Neurosci, La Jolla, CA 92093 USA.
[Delorme, Arnaud] Univ Toulouse 3, Ctr Rech Cerveau & Cognit, F-31062 Toulouse, France.
[Oostenveld, Robert] Radboud Univ Nijmegen, Donders Inst Brain Cognit & Behav, NL-6525 ED Nijmegen, Netherlands.
[Delorme, Arnaud] CNRS, CERCO, Toulouse, France.
[Onton, Julie] Naval Hlth Res Ctr, San Diego, CA USA.
RP Delorme, A (reprint author), Univ Calif San Diego, Swartz Ctr Computat Neurosci, La Jolla, CA 92093 USA.
EM arno@ucsd.edu
RI Delorme, Arnaud/F-8917-2011; Oostenveld, Robert/D-3259-2009
OI Oostenveld, Robert/0000-0002-1974-1293
FU Swartz Foundation (Old Field NY); National Institute of Mental Health
USA [RO1-NS047293-01A1]; National Science Foundation USA [NSF
IIS-0613595]
FX This work was supported by a gift from the Swartz Foundation (Old Field
NY) and by grants from the National Institute of Mental Health USA
(RO1-NS047293-01A1) and the National Science Foundation USA (NSF
IIS-0613595). The funders had no role in study design, data collection
and analysis, decision to publish, or preparation of the manuscript.
NR 56
TC 137
Z9 140
U1 0
U2 21
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD FEB 15
PY 2012
VL 7
IS 2
AR e30135
DI 10.1371/journal.pone.0030135
PG 14
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 925DP
UT WOS:000302741300008
PM 22355308
ER
PT J
AU Rigato, PO
Maciel, M
Goldoni, AL
Piubelli, OG
Orii, NM
Marques, ET
August, JT
Duarte, AJD
Sato, MN
AF Rigato, Paula Ordonhez
Maciel, Milton, Jr.
Goldoni, Adriana Leticia
Piubelli, Orlando Guerra
Orii, Noemia Mie
Marques, Ernesto Torres
August, Joseph Thomas
da Silva Duarte, Alberto Jose
Sato, Maria Notomi
TI Maternal LAMP/p55gagHIV-1 DNA Immunization Induces In Utero Priming and
a Long-Lasting Immune Response in Vaccinated Neonates
SO PLOS ONE
LA English
DT Article
ID EARLY-LIFE; T-CELL; HYPERSENSITIVITY RESPONSE; HIV-1 TRANSMISSION;
ALLERGEN EXPOSURE; MEMBRANE-PROTEIN; II COMPARTMENT; MICE; MOTHER; GAG
AB Infants born to HIV-infected mothers are at high risk of becoming infected during gestation or the breastfeeding period. A search is thus warranted for vaccine formulations that will prevent mother-to-child HIV transmission. The LAMP/gag DNA chimeric vaccine encodes the HIV-1 p55gag fused to the lysosome-associated membrane protein-1 (LAMP-1) and has been shown to enhance anti-Gag antibody (Ab) and cellular immune responses in adult and neonatal mice; such a vaccine represents a new concept in antigen presentation. In this study, we evaluated the effect of LAMP/gag DNA immunization on neonates either before conception or during pregnancy. LAMP/gag immunization of BALB/c mice before conception by the intradermal route led to the transfer of anti-Gag IgG1 Ab through the placenta and via breastfeeding. Furthermore, there were an increased percentage of CD4+ CD25+ Foxp3+ T cells in the spleens of neonates. When offspring were immunized with LAMP/gag DNA, the anti-Gag Ab response and the Gag-specific IFN-gamma-secreting cells were decreased. Inhibition of anti-Gag Ab production and cellular responses were not observed six months after immunization, indicating that maternal immunization did not interfere with the long-lasting memory response in offspring. Injection of purified IgG in conjunction with LAMP/gag DNA immunization decreased humoral and cytotoxic T-cell responses. LAMP/gag DNA immunization by intradermal injection prior to conception promoted the transfer of Ab, leading to a diminished response to Gag without interfering with the development of anti-Gag T- and B-cell memory. Finally, we assessed responses after one intravenous injection of LAMP/gag DNA during the last five days of pregnancy. The intravenous injection led to in utero immunization. In conclusion, DNA vaccine enconding LAMP-1 with Gag and other HIV-1 antigens should be considered in the development of a protective vaccine for the maternal/fetal and newborn periods.
C1 [Rigato, Paula Ordonhez; Goldoni, Adriana Leticia; Piubelli, Orlando Guerra; Orii, Noemia Mie; da Silva Duarte, Alberto Jose; Sato, Maria Notomi] Univ Sao Paulo, Sch Med, Lab Dermatol & Immunodeficiencies, Dept Dermatol,LIM 56, Sao Paulo, Brazil.
[Maciel, Milton, Jr.] USN, Enter Dis Dept, Infect Dis Directorate, Med Res Ctr, Silver Spring, MD USA.
[Marques, Ernesto Torres] Ctr Vaccine Res, Dept Infect Dis & Microbiol, Pittsburgh, PA USA.
[August, Joseph Thomas] Johns Hopkins Univ, Sch Med, Dept Pharmacol & Mol Sci, Baltimore, MD 21205 USA.
RP Rigato, PO (reprint author), Univ Sao Paulo, Sch Med, Lab Dermatol & Immunodeficiencies, Dept Dermatol,LIM 56, Sao Paulo, Brazil.
EM marisato@usp.br
RI Saude Publica, Inct/J-9544-2013; Marques, Ernesto/L-4514-2013; Ordonhez
Rigato, Paula/J-3618-2012; Goldoni, Adriana Leticia/I-1912-2012;
Marques, Ernesto/L-4967-2013
OI Marques, Ernesto/0000-0003-3826-9358; Goldoni, Adriana
Leticia/0000-0002-4298-8526; Marques, Ernesto/0000-0003-3826-9358
FU Ministerio da Saude do Brasil [914BRA1101]; Fundacao de Amparo a
Pesquisa de Sao Paulo (FAPESP) [2004/14443-2]; Laboratorio de
Investigacao Medica, Unidade 56 do Hospital das Clinicas da Faculdade de
Medicina de Sao Paulo
FX This work was supported by Ministerio da Saude do Brasil - Programa
Nacional de HIV/AIDS/DST (914BRA1101), Fundacao de Amparo a Pesquisa de
Sao Paulo (FAPESP no 2004/14443-2) and Laboratorio de
Investigacao Medica, Unidade 56 do Hospital das Clinicas da Faculdade de
Medicina de Sao Paulo. The funders had no role in study design, data
collection and analysis, decision to publish, or preparation of the
manuscript.
NR 33
TC 1
Z9 1
U1 1
U2 4
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD FEB 15
PY 2012
VL 7
IS 2
AR e31608
DI 10.1371/journal.pone.0031608
PG 11
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 925DP
UT WOS:000302741300081
PM 22355381
ER
PT J
AU Weiss, WR
Jiang, CG
AF Weiss, Walter R.
Jiang, Chengyong George
TI Protective CD8+T lymphocytes in Primates Immunized with Malaria
Sporozoites
SO PLOS ONE
LA English
DT Article
ID PLASMODIUM-FALCIPARUM SPOROZOITES; T-CELLS; CIRCUMSPOROZOITE PROTEIN;
IRRADIATED SPOROZOITES; STERILE PROTECTION; RHESUS-MONKEYS; LIVER
STAGES; RESPONSES; VACCINE; BERGHEI
AB Live attenuated malaria vaccines are more potent than the recombinant protein, bacterial or viral platform vaccines that have been tested, and an attenuated sporozoite vaccine against falciparum malaria is being developed for humans. In mice, attenuated malaria sporozoite vaccines induce CD8(+) T cells that kill parasites developing in the liver. We were curious to know if CD8(+) T cells were also important in protecting primates against malaria. We immunized 9 rhesus monkeys with radiation attenuated Plasmodium knowlesi sporozoites, and found that 5 did not develop blood stage infections after challenge with live sporozoites. We then injected 4 of these protected monkeys with cM-T807, a monoclonal antibody to the CD8 molecule which depletes T cells. The fifth monkey received equivalent doses of normal IgG. In 3 of the 4 monkeys receiving cM-T807 circulating CD8(+) T cells were profoundly depleted. When re-challenged with live sporozoites all 3 of these depleted animals developed blood stage malaria. The fourth monkey receiving cM-T807 retained many circulating CD8(+) T cells. This monkey, and the vaccinated monkey receiving normal IgG, did not develop blood stage malaria at re-challenge with live sporozoites. Animals were treated with antimalarial drugs and rested for 4 months. During this interval CD8(+) T cells re-appeared in the circulation of the depleted monkeys. When all vaccinated animals received a third challenge with live sporozoites, all 5 monkeys were once again protected and did not develop blood stage malaria infections. These data indicate that CD8(+) T cells are important effector cells protecting monkeys against malaria sporozoite infection. We believe that malaria vaccines which induce effector CD8+ T cells in humans will have the best chance of protecting against malaria.
C1 [Weiss, Walter R.; Jiang, Chengyong George] USN, Med Res Ctr, Dept Infect Dis, Silver Spring, MD USA.
RP Weiss, WR (reprint author), USN, Med Res Ctr, Dept Infect Dis, Silver Spring, MD USA.
EM walter.weiss@verizon.net
FU U.S. Army Medical Research Materiel Command [6000.RAD1.F.A0309]
FX This work was supported by funds allocated to the Naval Medical Research
Center by the U.S. Army Medical Research Materiel Command (work unit
6000.RAD1.F.A0309). The funders had no role in study design, data
collection and analysis, decision to publish, or preparation of the
manuscript.
NR 28
TC 35
Z9 36
U1 0
U2 2
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD FEB 15
PY 2012
VL 7
IS 2
AR e31247
DI 10.1371/journal.pone.0031247
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 925DP
UT WOS:000302741300049
PM 22355349
ER
PT J
AU Huete, C
Wouchuk, JG
Velikovich, AL
AF Huete, C.
Wouchuk, J. G.
Velikovich, A. L.
TI Analytical linear theory for the interaction of a planar shock wave with
a two- or three-dimensional random isotropic acoustic wave field
SO PHYSICAL REVIEW E
LA English
DT Article
ID RICHTMYER-MESHKOV INSTABILITY; TURBULENCE INTERACTION; RAREFACTION;
GROWTH
AB We present an analytical model that describes the linear interaction of a planar shock wave with an isotropic random sonic field. First, we study the interaction with a single-mode acoustic field. We present the exact evolution for the pressure, velocity, vorticity, and density field generated behind the shock wave, and we also calculate exact and closed analytical expressions for the asymptotic behavior of these modes. Applying superposition, we use the results obtained from the single-mode analysis in order to compute the interaction with 2D/3D isotropic random acoustic fields. We present analytical expressions for the average turbulent kinetic energy generated behind the shock, as well as the averaged vorticity and the density perturbations as a function of the shock strength M-1 and the gas compressibility gamma.. We also study the acoustic energy flux emitted by the shock front. Exact asymptotic analytical scaling laws are given for all the 3D averages downstream. A detailed comparison with previous works is shown.
C1 [Huete, C.; Wouchuk, J. G.] Univ Castilla La Mancha, Escuela Tecn Super Ingenieros Ind, Inst Invest Energet INEI, E-13071 Ciudad Real, Spain.
[Velikovich, A. L.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Huete, C (reprint author), Univ Castilla La Mancha, Escuela Tecn Super Ingenieros Ind, Inst Invest Energet INEI, Campus S-N, E-13071 Ciudad Real, Spain.
EM cesar.huete@uclm.es
RI Huete, Cesar/A-3184-2012; Wouchuk, J. G./F-1449-2016; Huete Ruiz de
Lira, Cesar/F-7412-2016
OI Huete, Cesar/0000-0002-3227-8520; Huete Ruiz de Lira,
Cesar/0000-0002-3227-8520
FU Ministry of Science; MEC [ENE2009-09276\, AP2007-02745]; Junta de CLM,
Spain [PEI11-0056-1890]; US DOE/NNSA
FX This work was supported by the Ministry of Science, MEC (ENE2009-09276,
AP2007-02745) and Junta de CLM (PEI11-0056-1890), Spain (C. H. and
J.G.W.) and by the US DOE/NNSA (A. L. V.). Encouragement from A. Bret
and A. R. Piriz (UCLM) is gratefully acknowledged.
NR 30
TC 7
Z9 7
U1 1
U2 7
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 FEB 15
PY 2012
VL 85
IS 2
AR 026312
DI 10.1103/PhysRevE.85.026312
PN 2
PG 31
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 894JL
UT WOS:000300422900003
PM 22463322
ER
PT J
AU Lane, PA
Cunningham, PD
Melinger, JS
Kushto, GP
Esenturk, O
Heilweil, EJ
AF Lane, Paul A.
Cunningham, Paul D.
Melinger, Joseph S.
Kushto, Gary P.
Esenturk, Okan
Heilweil, Edwin J.
TI Photoexcitation Dynamics in Films of C-60 and Zn Phthalocyanine with a
Layered Nanostructure
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID RESOLVED TERAHERTZ SPECTROSCOPY; SOLAR-CELLS; CHARGE-TRANSFER; METAL
PHTHALOCYANINES; CARRIER DYNAMICS; THIN-FILMS; SOLID C-60; BLENDS;
GENERATION; MOLECULES
AB We elucidate photoexcitation dynamics in C-60 and zinc phthalocyanine (ZnPc) from picoseconds to milliseconds by transient absorption and time-resolved terahertz spectroscopy. Autoionization of C-60 is a precursor to photocarrier generation. Decay of the terahertz signal is due to decreasing photocarrier mobility over the first 20 ps and thereafter reflects recombination dynamics. Singlet diffusion rates in C-60 are determined by modeling the rise of ground state bleaching of ZnPc absorption following C-60 excitation. Recombination dynamics transform from bimolecular to monomolecular as the layer thickness is reduced, revealing a metastable exciplex at the C-60/ZnPc interface with a lifetime of 150 mu s.
C1 [Lane, Paul A.; Cunningham, Paul D.; Melinger, Joseph S.; Kushto, Gary P.] USN, Res Lab, Washington, DC 20375 USA.
[Esenturk, Okan; Heilweil, Edwin J.] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
RP Lane, PA (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
FU Office of Naval Research; NIST
FX This work was supported by the Office of Naval Research and by NIST. P.
C. thanks the National Research Council for administering the
postdoctoral fellowship program at NRL.
NR 37
TC 21
Z9 21
U1 5
U2 36
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 15
PY 2012
VL 108
IS 7
AR 077402
DI 10.1103/PhysRevLett.108.077402
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 894JT
UT WOS:000300423700018
PM 22401254
ER
PT J
AU Lindquist, JM
Neta, B
Giraldo, FX
AF Lindquist, Joseph M.
Neta, Beny
Giraldo, Francis X.
TI High-order non-reflecting boundary conditions for dispersive waves in
polar coordinates using spectral elements
SO APPLIED MATHEMATICS AND COMPUTATION
LA English
DT Article
DE Klein-Gordon equation; Polar coordinates; Advection; Dispersion;
High-order; Non-reflecting boundary condition; Spectral elements
ID UNBOUNDED-DOMAINS; EQUATION; ADVECTION; SYSTEMS
AB High-order non-reflecting boundary conditions are introduced to create a finite computational space and for the solution of dispersive waves using a spectral element formulation with high-order time integration. Numerical examples are used to demonstrate the synergy of using high-order spatial, time, and boundary discretization. We show that by balancing all numerical errors involved, high-order accuracy can be achieved for unbounded domain problems in polar coordinate systems. Published by Elsevier Inc.
C1 [Lindquist, Joseph M.; Neta, Beny; Giraldo, Francis X.] USN, Dept Appl Math, Postgrad Sch, Monterey, CA 93943 USA.
RP Neta, B (reprint author), USN, Dept Appl Math, Postgrad Sch, 833 Dyer Rd, Monterey, CA 93943 USA.
EM joseph.lindquist@us.army.mil; bneta@nps.edu; fxgirald@nps.edu
OI Neta, Beny/0000-0002-7417-7496
FU US Army; Naval Postgraduate School
FX The first author is indebted to the US Army for its support. The authors
would like to express their appreciation to the Naval Postgraduate
School for its support of this research. Finally, the authors wish to
thank the reviewers for their helpful insights, suggestions and
comments.
NR 28
TC 1
Z9 1
U1 0
U2 3
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0096-3003
J9 APPL MATH COMPUT
JI Appl. Math. Comput.
PD FEB 15
PY 2012
VL 218
IS 12
BP 6666
EP 6676
DI 10.1016/j.amc.2011.12.023
PG 11
WC Mathematics, Applied
SC Mathematics
GA 886IJ
UT WOS:000299847700006
ER
PT J
AU Zhou, JC
Tsoi, S
Spillmann, CM
Naciri, J
Ratna, B
AF Zhou, Jing C.
Tsoi, Stanislav
Spillmann, Christopher M.
Naciri, Jawad
Ratna, Banahalli
TI Tuning mechanical properties of liquid crystalline nanoparticles
SO JOURNAL OF COLLOID AND INTERFACE SCIENCE
LA English
DT Article
DE Liquid crystalline nanoparticle; Gel-like matrix; Mechanical analysis;
5CB; Stiffness; Shape anisotropy
ID ATOMIC-FORCE MICROSCOPY; PHOTOPOLYMERIZATION; NANOCOLLOIDS; MONOMERS;
COLLOIDS; GELS
AB We report the synthesis of colloidal nanoparticles with an internal structure forming a gel-like matrix. These nanoparticles are composed of low molecular weight liquid crystal (LC) 4-pentyl-4-cyanobiphenyl (5CB) encapsulated in an LC-based polymer network. Using nanoscopic mechanical analysis, we demonstrate the ability to independently tune the shape anisotropy and stiffness by varying, respectively, the 5CB concentration and the extent of the polymer cross-linking. Based on these data, a model is introduced to account for the effect of the polymer network on the mechanical properties, thus providing novel insight into the nanomechanics of these soft particles. Published by Elsevier Inc.
C1 [Zhou, Jing C.; Tsoi, Stanislav; Spillmann, Christopher M.; Naciri, Jawad; Ratna, Banahalli] USN, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC 20375 USA.
RP Ratna, B (reprint author), USN, Res Lab, Ctr Bio Mol Sci & Engn, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM banahalli.ratna@nrl.navy.mil
FU Defence Threat Reduction Agency; Office of Naval Research; National
Research Council
FX The authors thank the Defence Threat Reduction Agency and the Office of
Naval Research for funding and Mr. Martin Moore for synthesizing
DACTP11. J.C.Z. thanks the National Research Council for providing
funding for the postdoctoral associateship.
NR 15
TC 2
Z9 2
U1 4
U2 20
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 FEB 15
PY 2012
VL 368
BP 152
EP 157
DI 10.1016/j.jcis.2011.11.043
PG 6
WC Chemistry, Physical
SC Chemistry
GA 881MJ
UT WOS:000299490500020
PM 22183259
ER
PT J
AU Fontanella, JJ
Boyles, DA
Filipova, TS
Awwad, S
Edmondson, CA
Bendler, JT
Wintersgill, MC
Lomax, JF
Schroeder, MJ
AF Fontanella, J. J.
Boyles, D. A.
Filipova, T. S.
Awwad, S.
Edmondson, C. A.
Bendler, J. T.
Wintersgill, M. C.
Lomax, J. F.
Schroeder, M. J.
TI Dielectric studies of tetraaryl and triaryl polycarbonates and
comparisons with bisphenol A-polycarbonate
SO JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
LA English
DT Article
DE dielectric properties; dielectric relaxation; glass transition; glassy
polymers; high-performance polymers; high-temperature materials;
polycarbonates
ID GLASS-TRANSITION TEMPERATURE; DEFECT DIFFUSION-MODEL; DENSE POLYMER
SYSTEMS; CROSS-SECTIONAL AREA; SECONDARY RELAXATION; MOLECULAR-WEIGHT;
IMPACT STRENGTH; SOLID-SOLUTIONS; AROMATIC POLYCARBONATES; POLY(ESTER
CARBONATE)S
AB The relative permittivity, loss, and breakdown strength are reported for a commercial sample of bisphenol A-polycarbonate (comm-BPA-PC) and a purified sample of the same polymer (rp-BPA-PC) as well as for two new polycarbonates having low molecular cross-sectional areas, namely a copolymer of tetraaryl polycarbonate and BPA-PC (TABPA-BPA-PC) and a triaryl polycarbonate homopolymer (TriBPA-PC). The glass transition temperatures of the new polymers are higher than the Tg of BPA-PC (187 and 191 degrees C vs. 148 degrees C). Relative permittivity and loss measurements were carried out from 10 to 105 Hz over a wide temperature range, and results for the a- and -relaxation regions are discussed in detail. For the a-relaxation, the isochronal peak position, Ta, scales approximately with Tg. On the other hand, the peak temperature for the ?-relaxation is approximately constant, independent of Tg. Also, in contrast to what is observed for a, ? exhibits a strong increase in peak height as temperature/frequency increases and a significant difference is found between Arrhenius plots determined from isochronal and isothermal data analyses. Next, the ?-relaxation region for comm-BPA-PC and associated activation parameters show strong history/purity effects. The activation parameters also depend on the method of data analysis. The results shed light on discrepancies that exist in the literature for BPA-PC. The shapes of the loss peaks and hence glassy-state motions for all the polymers are very similar. However, the intensities of the TriBPA-PC and TABPA-BPA-PC peaks are reduced by an amount that closely matches the reduced volume fraction of carbonate units in the two new polymers. Finally, for comm-BPA-PC, the breakdown strength is strongly affected by sample history and this is assumed to be related to volatile components in the material. It is found that the breakdown strengths for TriBPA-PC and TABPA-BPA-PC are relatively close to that for rp-BPA-PC with the value for TriBPA-PC being slightly larger than that for rp-BPA-PC or the value usually reported for typical capacitor grade polycarbonate. Finally, it is shown that the real part of the relative permittivity remains relatively constant from low temperatures to Tg. Consequently, based on the dielectric properties, TriBPA-PC and TABPA-BPA-PC should be usable in capacitors to at least 50 degrees C higher than BPA-PC. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2011
C1 [Fontanella, J. J.; Edmondson, C. A.; Wintersgill, M. C.] USN Acad, Dept Phys, Annapolis, MD 21402 USA.
[Boyles, D. A.; Filipova, T. S.; Awwad, S.] S Dakota Sch Mines & Technol, Dept Chem, Rapid City, SD 57701 USA.
[Bendler, J. T.] BSC Inc, Rapid City, SD 57702 USA.
[Lomax, J. F.; Schroeder, M. J.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
RP Fontanella, JJ (reprint author), USN Acad, Dept Phys, Annapolis, MD 21402 USA.
EM fontanel@comcast.net
FU U.S. Office of Naval Research; Department of Defense-Army Research
Office [DAAD19-01-1-0482]
FX This work was supported in part by the U.S. Office of Naval Research.
J.T. Bendler, D. A. Boyles, and T. S. Filipova gratefully acknowledge
financial support by the Department of Defense-Army Research Office
(Grant No. DAAD19-01-1-0482). The authors thank Mark A. Westgate for
technical assistance.
NR 109
TC 5
Z9 5
U1 3
U2 20
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0887-6266
J9 J POLYM SCI POL PHYS
JI J. Polym. Sci. Pt. B-Polym. Phys.
PD FEB 15
PY 2012
VL 50
IS 4
BP 289
EP 304
DI 10.1002/polb.23010
PG 16
WC Polymer Science
SC Polymer Science
GA 872GJ
UT WOS:000298796900008
ER
PT J
AU Wolak, MA
Wan, AS
Shirk, JS
Mackey, M
Hiltner, A
Baer, E
AF Wolak, Mason A.
Wan, Alan S.
Shirk, James S.
Mackey, Matt
Hiltner, Anne
Baer, Eric
TI Imaging the Effect of Dielectric Breakdown in a Multilayered Polymer
Film
SO JOURNAL OF APPLIED POLYMER SCIENCE
LA English
DT Article
DE focused ion beam (FIB); scanning electron microscopy (SEM); multilayer
composite; dielectric properties; polycarbonates; poly(vinylidene
fluorides)
ID FOCUSED ION-BEAM; ELECTRIC-FIELD; BARRIER; COMPOSITES
AB The dielectric strength and energy storage capability of poly(vinylidene fluoride-hexafluoropropylene) copolymer (P[VDF-HFP]) films are enhanced by interleaving layers of PVDF copolymer with thin layers of polycarbonate (PC). To gain insight into the breakdown processes in such materials, focused ion beam (FIB) milling in conjunction with scanning electron microscopy (SEM) was used to study the effect of a breakdown on the film. FIB can sequentially mill cross sections that are each imaged by SEM. The technique can provide quasi-3D images across the film and give a detailed view of the damage caused by an electrical breakdown. Here, breakdowns initiated using a needle-plane electrode configuration were imaged. In homogeneous films, the damage was confined to the small volume at the pinhole site. In 32-layer 50/50 PC/P[VDF-HFP] multilayer films, damage extending laterally up to similar to 15 mu m into the film along the layer interfaces was seen. In addition to the delamination, layer buckling and distortion were apparent. The damage varied with the sample orientation, but the images indicate that the interfaces play an important role in the breakdown. They suggest that modifying the interface properties can be a strategy to further improve the dielectric strength of multilayer polymer dielectric materials. (C) 2011 Wiley Periodicals, Inc(dagger). J Appl Polym Sci 123: 25482557, 2012
C1 [Wolak, Mason A.; Shirk, James S.] USN, Div Opt Sci, Res Lab, Washington, DC 20375 USA.
[Wan, Alan S.] Evans Analyt Grp, E Windsor, NJ 08520 USA.
[Mackey, Matt; Hiltner, Anne; Baer, Eric] Case Western Reserve Univ, Dept Macromol Sci, Cleveland, OH 44106 USA.
[Mackey, Matt; Hiltner, Anne; Baer, Eric] Case Western Reserve Univ, Ctr Appl Polymer Res, Cleveland, OH 44106 USA.
RP Wolak, MA (reprint author), USN, Div Opt Sci, Res Lab, Washington, DC 20375 USA.
EM mason.wolak@nrl.navy.mil
FU Office of Naval Research; National Science Foundation
FX We thank the Office of Naval Research for support of this work.
Case-Western Reserve University also acknowledges the support of the
National Science Foundation.
NR 24
TC 20
Z9 21
U1 3
U2 42
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0021-8995
J9 J APPL POLYM SCI
JI J. Appl. Polym. Sci.
PD FEB 15
PY 2012
VL 123
IS 4
BP 2548
EP 2557
DI 10.1002/app.34269
PG 10
WC Polymer Science
SC Polymer Science
GA 860ET
UT WOS:000297932300080
ER
PT J
AU Agakishiev, G
Aggarwal, MM
Ahammed, Z
Alakhverdyants, AV
Alekseev, I
Alford, J
Anderson, BD
Anson, CD
Arkhipkin, D
Averichev, GS
Balewski, J
Barnby, LS
Beavis, DR
Bellwied, R
Betancourt, MJ
Betts, RR
Bhasin, A
Bhati, AK
Bichsel, H
Bielcik, J
Bielcikova, J
Bland, LC
Bordyuzhin, IG
Borowski, W
Bouchet, J
Braidot, E
Brandin, AV
Brovko, SG
Bruna, E
Bueltmann, S
Bunzarov, I
Burton, TP
Cai, XZ
Caines, H
Sanchez, MCD
Cebra, D
Cendejas, R
Cervantes, MC
Chaloupka, P
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Chen, L
Cheng, J
Cherney, M
Chikanian, A
Christie, W
Chung, P
Codrington, MJM
Corliss, R
Cramer, JG
Crawford, HJ
Cui, X
Leyva, AD
De Silva, LC
Debbe, RR
Dedovich, TG
Deng, J
Derevschikov, AA
de Souza, RD
Didenko, L
Djawotho, P
Dong, X
Drachenberg, JL
Draper, JE
Du, CM
Dunlop, JC
Efimov, LG
Elnimr, M
Engelage, J
Eppley, G
Estienne, M
Eun, L
Evdokimov, O
Fachini, P
Fatemi, R
Fedorisin, J
Fersch, RG
Filip, P
Finch, E
Fine, V
Fisyak, Y
Gagliardi, CA
Gangadharan, DR
Geurts, F
Ghosh, P
Gorbunov, YN
Gordon, A
Grebenyuk, OG
Grosnick, D
Gupta, A
Gupta, S
Guryn, W
Haag, B
Hajkova, O
Hamed, A
Han, LX
Harris, JW
Hays-Wehle, JP
Heppelmann, S
Hirsch, A
Hoffmann, GW
Hofman, DJ
Huang, B
Huang, HZ
Humanic, TJ
Huo, L
Igo, G
Jacobs, WW
Jena, C
Joseph, J
Judd, EG
Kabana, S
Kang, K
Kapitan, J
Kauder, K
Ke, HW
Keane, D
Kechechyan, A
Kettler, D
Kikola, DP
Kiryluk, J
Kisiel, A
Kizka, V
Klein, SR
Koetke, DD
Kollegger, T
Konzer, J
Koralt, I
Koroleva, L
Korsch, W
Kotchenda, L
Kravtsov, P
Krueger, K
Kumar, L
Lamont, MAC
Landgraf, JM
LaPointe, S
Lauret, J
Lebedev, A
Lednicky, R
Lee, JH
Leight, W
LeVine, MJ
Li, C
Li, L
Li, W
Li, X
Li, X
Li, Y
Li, ZM
Lima, LM
Lisa, MA
Liu, F
Ljubicic, T
Llope, WJ
Longacre, RS
Lu, Y
Lukashov, EV
Luo, X
Ma, GL
Ma, YG
Mahapatra, DP
Majka, R
Mall, OI
Margetis, S
Markert, C
Masui, H
Matis, HS
McDonald, D
McShane, TS
Meschanin, A
Milner, R
Minaev, NG
Mioduszewski, S
Mitrovski, MK
Mohammed, Y
Mohanty, B
Mondal, MM
Morozov, B
Morozov, DA
Munhoz, MG
Mustafa, MK
Naglis, M
Nandi, BK
Nasim, M
Nayak, TK
Nogach, LV
Nurushev, SB
Odyniec, G
Ogawa, A
Oh, K
Ohlson, A
Okorokov, V
Oldag, EW
Oliveira, RAN
Olson, D
Pachr, M
Page, BS
Pal, SK
Pandit, Y
Panebratsev, Y
Pawlak, T
Pei, H
Peitzmann, T
Perkins, C
Peryt, W
Pile, P
Planinic, M
Pluta, J
Plyku, D
Poljak, N
Porter, J
Poskanzer, AM
Powell, CB
Prindle, D
Pruneau, C
Pruthi, NK
Pujahari, PR
Putschke, J
Qiu, H
Raniwala, R
Raniwala, S
Ray, RL
Redwine, R
Reed, R
Ritter, HG
Roberts, JB
Rogachevskiy, OV
Romero, JL
Ruan, L
Rusnak, J
Sahoo, NR
Sakrejda, I
Salur, S
Sandweiss, J
Sangaline, E
Sarkar, A
Schambach, J
Scharenberg, RP
Schmah, AM
Schmitz, N
Schuster, TR
Seele, J
Seger, J
Selyuzhenkov, I
Seyboth, P
Shah, N
Shahaliev, E
Shao, M
Sharma, M
Shi, SS
Shou, QY
Sichtermann, EP
Simon, F
Singaraju, RN
Skoby, MJ
Smirnov, N
Solanki, D
Sorensen, P
deSouza, UG
Spinka, HM
Srivastava, B
Stanislaus, TDS
Steadman, SG
Stevens, JR
Stock, R
Strikhanov, M
Stringfellow, B
Suaide, AAP
Suarez, MC
Sumbera, M
Sun, XM
Sun, Y
Sun, Z
Surrow, B
Svirida, DN
Symons, TJM
de Toledo, AS
Takahashi, J
Tang, AH
Tang, Z
Tarini, LH
Tarnowsky, T
Thein, D
Thomas, JH
Tian, J
Timmins, AR
Tlusty, D
Tokarev, M
Trainor, TA
Trentalange, S
Tribble, RE
Tribedy, P
Trzeciak, BA
Tsai, OD
Ullrich, T
Underwood, DG
Van Buren, G
van Nieuwenhuizen, G
Vanfossen, JA
Varma, R
Vasconcelos, GMS
Vasiliev, AN
Videbaek, F
Viyogi, YP
Vokal, S
Voloshin, SA
Wada, M
Walker, M
Wang, F
Wang, G
Wang, H
Wang, JS
Wang, Q
Wang, XL
Wang, Y
Webb, G
Webb, JC
Westfall, GD
Whitten, C
Wieman, H
Wissink, SW
Witt, R
Witzke, W
Wu, YF
Xiao, Z
Xie, W
Xu, H
Xu, N
Xu, QH
Xu, W
Xu, Y
Xu, Z
Xue, L
Yang, Y
Yang, Y
Yepes, P
Yip, K
Yoo, IK
Zawisza, M
Zbroszczyk, H
Zhan, W
Zhang, JB
Zhang, S
Zhang, WM
Zhang, XP
Zhang, Y
Zhang, ZP
Zhao, F
Zhao, J
Zhong, C
Zhu, X
Zhu, YH
Zoulkarneeva, Y
AF Agakishiev, G.
Aggarwal, M. M.
Ahammed, Z.
Alakhverdyants, A. V.
Alekseev, I.
Alford, J.
Anderson, B. D.
Anson, C. D.
Arkhipkin, D.
Averichev, G. S.
Balewski, J.
Barnby, L. S.
Beavis, D. R.
Bellwied, R.
Betancourt, M. J.
Betts, R. R.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Bland, L. C.
Bordyuzhin, I. G.
Borowski, W.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Brovko, S. G.
Bruna, E.
Bueltmann, S.
Bunzarov, I.
Burton, T. P.
Cai, X. Z.
Caines, H.
Sanchez, M. Calderon de la Barca
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Chen, L.
Cheng, J.
Cherney, M.
Chikanian, A.
Christie, W.
Chung, P.
Codrington, M. J. M.
Corliss, R.
Cramer, J. G.
Crawford, H. J.
Cui, X.
Leyva, A. Davila
De Silva, L. C.
Debbe, R. R.
Dedovich, T. G.
Deng, J.
Derevschikov, A. A.
Derradi de Souza, R.
Didenko, L.
Djawotho, P.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Du, C. M.
Dunlop, J. C.
Efimov, L. G.
Elnimr, M.
Engelage, J.
Eppley, G.
Estienne, M.
Eun, L.
Evdokimov, O.
Fachini, P.
Fatemi, R.
Fedorisin, J.
Fersch, R. G.
Filip, P.
Finch, E.
Fine, V.
Fisyak, Y.
Gagliardi, C. A.
Gangadharan, D. R.
Geurts, F.
Ghosh, P.
Gorbunov, Y. N.
Gordon, A.
Grebenyuk, O. G.
Grosnick, D.
Gupta, A.
Gupta, S.
Guryn, W.
Haag, B.
Hajkova, O.
Hamed, A.
Han, L-X.
Harris, J. W.
Hays-Wehle, J. P.
Heppelmann, S.
Hirsch, A.
Hoffmann, G. W.
Hofman, D. J.
Huang, B.
Huang, H. Z.
Humanic, T. J.
Huo, L.
Igo, G.
Jacobs, W. W.
Jena, C.
Joseph, J.
Judd, E. G.
Kabana, S.
Kang, K.
Kapitan, J.
Kauder, K.
Ke, H. W.
Keane, D.
Kechechyan, A.
Kettler, D.
Kikola, D. P.
Kiryluk, J.
Kisiel, A.
Kizka, V.
Klein, S. R.
Koetke, D. D.
Kollegger, T.
Konzer, J.
Koralt, I.
Koroleva, L.
Korsch, W.
Kotchenda, L.
Kravtsov, P.
Krueger, K.
Kumar, L.
Lamont, M. A. C.
Landgraf, J. M.
LaPointe, S.
Lauret, J.
Lebedev, A.
Lednicky, R.
Lee, J. H.
Leight, W.
LeVine, M. J.
Li, C.
Li, L.
Li, W.
Li, X.
Li, X.
Li, Y.
Li, Z. M.
Lima, L. M.
Lisa, M. A.
Liu, F.
Ljubicic, T.
Llope, W. J.
Longacre, R. S.
Lu, Y.
Lukashov, E. V.
Luo, X.
Ma, G. L.
Ma, Y. G.
Mahapatra, D. P.
Majka, R.
Mall, O. I.
Margetis, S.
Markert, C.
Masui, H.
Matis, H. S.
McDonald, D.
McShane, T. S.
Meschanin, A.
Milner, R.
Minaev, N. G.
Mioduszewski, S.
Mitrovski, M. K.
Mohammed, Y.
Mohanty, B.
Mondal, M. M.
Morozov, B.
Morozov, D. A.
Munhoz, M. G.
Mustafa, M. K.
Naglis, M.
Nandi, B. K.
Nasim, Md
Nayak, T. K.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Oh, K.
Ohlson, A.
Okorokov, V.
Oldag, E. W.
Oliveira, R. A. N.
Olson, D.
Pachr, M.
Page, B. S.
Pal, S. K.
Pandit, Y.
Panebratsev, Y.
Pawlak, T.
Pei, H.
Peitzmann, T.
Perkins, C.
Peryt, W.
Pile, P.
Planinic, M.
Pluta, J.
Plyku, D.
Poljak, N.
Porter, J.
Poskanzer, A. M.
Powell, C. B.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Pujahari, P. R.
Putschke, J.
Qiu, H.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Redwine, R.
Reed, R.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Ruan, L.
Rusnak, J.
Sahoo, N. R.
Sakrejda, I.
Salur, S.
Sandweiss, J.
Sangaline, E.
Sarkar, A.
Schambach, J.
Scharenberg, R. P.
Schmah, A. M.
Schmitz, N.
Schuster, T. R.
Seele, J.
Seger, J.
Selyuzhenkov, I.
Seyboth, P.
Shah, N.
Shahaliev, E.
Shao, M.
Sharma, M.
Shi, S. S.
Shou, Q. Y.
Sichtermann, E. P.
Simon, F.
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Solanki, D.
Sorensen, P.
deSouza, U. G.
Spinka, H. M.
Srivastava, B.
Stanislaus, T. D. S.
Steadman, S. G.
Stevens, J. R.
Stock, R.
Strikhanov, M.
Stringfellow, B.
Suaide, A. A. P.
Suarez, M. C.
Sumbera, M.
Sun, X. M.
Sun, Y.
Sun, Z.
Surrow, B.
Svirida, D. N.
Symons, T. J. M.
de Toledo, A. Szanto
Takahashi, J.
Tang, A. H.
Tang, Z.
Tarini, L. H.
Tarnowsky, T.
Thein, D.
Thomas, J. H.
Tian, J.
Timmins, A. R.
Tlusty, D.
Tokarev, M.
Trainor, T. A.
Trentalange, S.
Tribble, R. E.
Tribedy, P.
Trzeciak, B. A.
Tsai, O. D.
Ullrich, T.
Underwood, D. G.
Van Buren, G.
van Nieuwenhuizen, G.
Vanfossen, J. A., Jr.
Varma, R.
Vasconcelos, G. M. S.
Vasiliev, A. N.
Videbaek, F.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Wada, M.
Walker, M.
Wang, F.
Wang, G.
Wang, H.
Wang, J. S.
Wang, Q.
Wang, X. L.
Wang, Y.
Webb, G.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wissink, S. W.
Witt, R.
Witzke, W.
Wu, Y. F.
Xiao, Z.
Xie, W.
Xu, H.
Xu, N.
Xu, Q. H.
Xu, W.
Xu, Y.
Xu, Z.
Xue, L.
Yang, Y.
Yang, Y.
Yepes, P.
Yip, K.
Yoo, I-K.
Zawisza, M.
Zbroszczyk, H.
Zhan, W.
Zhang, J. B.
Zhang, S.
Zhang, W. M.
Zhang, X. P.
Zhang, Y.
Zhang, Z. P.
Zhao, F.
Zhao, J.
Zhong, C.
Zhu, X.
Zhu, Y. H.
Zoulkarneeva, Y.
CA STAR Collaboration
TI Identified Hadron Compositions in p plus p and Au plus Au Collisions at
High Transverse Momenta at root s(NN)=200 GeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID QUARK-GLUON PLASMA; STAR; SPECTRA; COLLABORATION; PERSPECTIVE; MATTER;
TPC
AB We report transverse momentum (p(T) <= 15 GeV/c) spectra of pi(+/-), K-+/-, p, (p) over bar, K-0(S), and rho(0) at midrapidity in p + p and Au + Au collisions at root s(NN) = 200 GeV. Perturbative QCD calculations are consistent with pi(+/-) spectra in p + p collisions but do not reproduce K and p((p) over bar) spectra. The observed decreasing antiparticle-to-particle ratios with increasing p(T) provide experimental evidence for varying quark and gluon jet contributions to high-p(T) hadron yields. The relative hadron abundances in Au + Au at p(T) >= 8 GeV/c are measured to be similar to the p + p results, despite the expected Casimir effect for parton energy loss.
C1 [Agakishiev, G.; Alakhverdyants, A. V.; Averichev, G. S.; Bunzarov, I.; Dedovich, T. G.; Efimov, L. G.; Fedorisin, J.; Filip, P.; Kechechyan, A.; Kizka, V.; Lednicky, R.; Panebratsev, Y.; Rogachevskiy, O. V.; Shahaliev, E.; Tokarev, M.; Vokal, S.; Zoulkarneeva, Y.] Joint Inst Nucl Res, Dubna 141980, Russia.
[Krueger, K.; Spinka, H. M.; Underwood, D. G.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Barnby, L. S.] Univ Birmingham, Birmingham, W Midlands, England.
[Arkhipkin, D.; Beavis, D. R.; Bland, L. C.; Burton, T. P.; Christie, W.; Debbe, R. R.; Didenko, L.; Dunlop, J. C.; Fachini, P.; Fine, V.; Fisyak, Y.; Gordon, A.; Guryn, W.; Lamont, M. A. C.; Landgraf, J. M.; Lauret, J.; Lebedev, A.; Lee, J. H.; LeVine, M. J.; Ljubicic, T.; Longacre, R. S.; Mitrovski, M. K.; Ogawa, A.; Pile, P.; Ruan, L.; Sorensen, P.; Tang, A. H.; Ullrich, T.; Van Buren, G.; Videbaek, F.; Webb, J. C.; Xu, Z.; Yip, K.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Crawford, H. J.; Engelage, J.; Judd, E. G.; Perkins, C.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Brovko, S. G.; Sanchez, M. Calderon de la Barca; Cebra, D.; Draper, J. E.; Haag, B.; Mall, O. I.; Reed, R.; Romero, J. L.; Sangaline, E.] Univ Calif Davis, Davis, CA 95616 USA.
[Cendejas, R.; Huang, H. Z.; Igo, G.; Shah, N.; Trentalange, S.; Tsai, O. D.; Wang, G.; Whitten, C., Jr.; Xu, W.; Zhao, F.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[Derradi de Souza, R.; Takahashi, J.; Vasconcelos, G. M. S.] Univ Estadual Campinas, Sao Paulo, Brazil.
[Betts, R. R.; Evdokimov, O.; Hofman, D. J.; Kauder, K.; Pei, H.; Suarez, M. C.] Univ Illinois, Chicago, IL 60607 USA.
[Cherney, M.; Gorbunov, Y. N.; McShane, T. S.; Seger, J.] Creighton Univ, Omaha, NE 68178 USA.
[Bielcik, J.; Hajkova, O.; Pachr, M.] Czech Tech Univ, FNSPE, Prague 11519, Czech Republic.
[Bielcikova, J.; Chaloupka, P.; Chung, P.; Kapitan, J.; Rusnak, J.; Sumbera, M.; Tlusty, D.] Nucl Phys Inst AS CR, Rez 25068, Czech Republic.
[Kollegger, T.; Schuster, T. R.; Stock, R.] Goethe Univ Frankfurt, Frankfurt, Germany.
[Jena, C.; Mahapatra, D. P.] Inst Phys, Bhubaneswar 751005, Orissa, India.
[Nandi, B. K.; Pujahari, P. R.; Sarkar, A.; Varma, R.] Indian Inst Technol, Bombay 400076, Maharashtra, India.
[Jacobs, W. W.; Page, B. S.; Selyuzhenkov, I.; Stevens, J. R.; Wissink, S. W.] Indiana Univ, Bloomington, IN 47408 USA.
[Alekseev, I.; Bordyuzhin, I. G.; Koroleva, L.; Morozov, B.; Svirida, D. N.] Alikhanov Inst Theoret & Expt Phys, Moscow, Russia.
[Bhasin, A.; Gupta, A.; Gupta, S.] Univ Jammu, Jammu 180001, India.
[Alford, J.; Anderson, B. D.; Bouchet, J.; Joseph, J.; Keane, D.; Kumar, L.; Margetis, S.; Pandit, Y.; Vanfossen, J. A., Jr.; Zhang, W. M.] Kent State Univ, Kent, OH 44242 USA.
[Fatemi, R.; Fersch, R. G.; Korsch, W.; Webb, G.; Witzke, W.] Univ Kentucky, Lexington, KY 40506 USA.
[Du, C. M.; Qiu, H.; Sun, Z.; Wang, J. S.; Xu, H.; Yang, Y.; Zhan, W.] Inst Modern Phys, Lanzhou, Peoples R China.
[Dong, X.; Grebenyuk, O. G.; Kiryluk, J.; Klein, S. R.; Masui, H.; Matis, H. S.; Naglis, M.; Odyniec, G.; Olson, D.; Porter, J.; Poskanzer, A. M.; Powell, C. B.; Ritter, H. G.; Sakrejda, I.; Salur, S.; Schmah, A. M.; Sichtermann, E. P.; Sun, X. M.; Symons, T. J. M.; Thomas, J. H.; Wieman, H.; Xu, N.; Zhang, Y.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Balewski, J.; Betancourt, M. J.; Corliss, R.; Hays-Wehle, J. P.; Leight, W.; Milner, R.; Redwine, R.; Seele, J.; Steadman, S. G.; Surrow, B.; van Nieuwenhuizen, G.; Walker, M.] MIT, Cambridge, MA 02139 USA.
[Schmitz, N.; Seyboth, P.; Simon, F.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Tarnowsky, T.; Wang, H.; Westfall, G. D.] Michigan State Univ, E Lansing, MI 48824 USA.
[Brandin, A. V.; Kotchenda, L.; Kravtsov, P.; Lukashov, E. V.; Okorokov, V.; Strikhanov, M.] Moscow Engn Phys Inst, Moscow 115409, Russia.
[Braidot, E.; Peitzmann, T.] NIKHEF, Amsterdam, Netherlands.
[Braidot, E.; Peitzmann, T.] Univ Utrecht, Amsterdam, Netherlands.
[Anson, C. D.; Gangadharan, D. R.; Humanic, T. J.; Lisa, M. A.] Ohio State Univ, Columbus, OH 43210 USA.
[Bueltmann, S.; Koralt, I.; Plyku, D.] Old Dominion Univ, Norfolk, VA 23529 USA.
[Aggarwal, M. M.; Bhati, A. K.; Pruthi, N. K.] Panjab Univ, Chandigarh 160014, India.
[Eun, L.; Heppelmann, S.] Penn State Univ, University Pk, PA 16802 USA.
[Derevschikov, A. A.; Meschanin, A.; Minaev, N. G.; Morozov, D. A.; Nogach, L. V.; Nurushev, S. B.; Vasiliev, A. N.] Inst High Energy Phys, Protvino, Russia.
[Hirsch, A.; Kikola, D. P.; Konzer, J.; Li, X.; Mustafa, M. K.; Scharenberg, R. P.; Skoby, M. J.; Srivastava, B.; Stringfellow, B.; Wang, F.; Wang, Q.; Xie, W.] Purdue Univ, W Lafayette, IN 47907 USA.
[Oh, K.; Yoo, I-K.] Pusan Natl Univ, Pusan 609735, South Korea.
[Raniwala, R.; Raniwala, S.; Solanki, D.] Univ Rajasthan, Jaipur 302004, Rajasthan, India.
[Eppley, G.; Geurts, F.; Llope, W. J.; McDonald, D.; Roberts, J. B.; Yepes, P.] Rice Univ, Houston, TX 77251 USA.
[Lima, L. M.; Munhoz, M. G.; Oliveira, R. A. N.; deSouza, U. G.; Suaide, A. A. P.; de Toledo, A. Szanto] Univ Sao Paulo, Sao Paulo, Brazil.
[Chen, H. F.; Cui, X.; Huang, B.; Li, C.; Lu, Y.; Luo, X.; Shao, M.; Sun, Y.; Tang, Z.; Wang, X. L.; Xu, Y.; Zhang, Z. P.] Univ Sci & Technol China, Hefei 230026, Peoples R China.
[Deng, J.; Li, X.; Xu, Q. H.] Shandong Univ, Jinan 250100, Shandong, Peoples R China.
[Cai, X. Z.; Chen, J. H.; Han, L-X.; Li, W.; Ma, G. L.; Ma, Y. G.; Shou, Q. Y.; Tian, J.; Xue, L.; Zhang, S.; Zhao, J.; Zhong, C.; Zhu, Y. H.] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
[Borowski, W.; Estienne, M.; Kabana, S.] SUBATECH, Nantes, France.
[Cervantes, M. C.; Codrington, M. J. M.; Djawotho, P.; Drachenberg, J. L.; Gagliardi, C. A.; Hamed, A.; Huo, L.; Mioduszewski, S.; Mohammed, Y.; Tribble, R. E.] Texas A&M Univ, College Stn, TX 77843 USA.
[Leyva, A. Davila; Hoffmann, G. W.; Li, L.; Markert, C.; Oldag, E. W.; Ray, R. L.; Schambach, J.; Thein, D.; Wada, M.] Univ Texas Austin, Austin, TX 78712 USA.
[Bellwied, R.; De Silva, L. C.; Timmins, A. R.] Univ Houston, Houston, TX 77204 USA.
[Cheng, J.; Kang, K.; Li, Y.; Wang, Y.; Xiao, Z.; Zhang, X. P.; Zhu, X.] Tsinghua Univ, Beijing 100084, Peoples R China.
[Witt, R.] USN Acad, Annapolis, MD 21402 USA.
[Grosnick, D.; Koetke, D. D.; Stanislaus, T. D. S.] Valparaiso Univ, Valparaiso, IN 46383 USA.
[Ahammed, Z.; Chattopadhyay, S.; Ghosh, P.; Mohanty, B.; Mondal, M. M.; Nasim, Md; Nayak, T. K.; Pal, S. K.; Sahoo, N. R.; Singaraju, R. N.; Tribedy, P.; Viyogi, Y. P.] Ctr Variable Energy Cyclotron, Kolkata 700064, India.
[Kisiel, A.; Pawlak, T.; Peryt, W.; Pluta, J.; Trzeciak, B. A.; Zawisza, M.; Zbroszczyk, H.] Warsaw Univ Technol, Warsaw, Poland.
[Bichsel, H.; Cramer, J. G.; Kettler, D.; Prindle, D.; Trainor, T. A.] Univ Washington, Seattle, WA 98195 USA.
[Elnimr, M.; LaPointe, S.; Pruneau, C.; Sharma, M.; Tarini, L. H.; Voloshin, S. A.] Wayne State Univ, Detroit, MI 48201 USA.
[Chen, J. Y.; Chen, L.; Ke, H. W.; Li, Z. M.; Liu, F.; Shi, S. S.; Wu, Y. F.; Yang, Y.; Zhang, J. B.] CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China.
[Bruna, E.; Caines, H.; Chikanian, A.; Finch, E.; Harris, J. W.; Majka, R.; Ohlson, A.; Putschke, J.; Sandweiss, J.; Smirnov, N.] Yale Univ, New Haven, CT 06520 USA.
[Planinic, M.; Poljak, N.] Univ Zagreb, HR-10002 Zagreb, Croatia.
RP Agakishiev, G (reprint author), Joint Inst Nucl Res, Dubna 141980, Russia.
RI Derradi de Souza, Rafael/M-4791-2013; Suaide, Alexandre/L-6239-2016;
Svirida, Dmitry/R-4909-2016; Inst. of Physics, Gleb
Wataghin/A-9780-2017; Okorokov, Vitaly/C-4800-2017; Ma,
Yu-Gang/M-8122-2013; Yang, Yanyun/B-9485-2014; Rusnak, Jan/G-8462-2014;
Bielcikova, Jana/G-9342-2014; Xu, Wenqin/H-7553-2014; Barnby,
Lee/G-2135-2010; Alekseev, Igor/J-8070-2014; Sumbera,
Michal/O-7497-2014; Strikhanov, Mikhail/P-7393-2014; XIAO,
Zhigang/C-3788-2015; Aparecido Negrao de Oliveira, Renato/G-9133-2015;
Bruna, Elena/C-4939-2014; Chaloupka, Petr/E-5965-2012; Huang,
Bingchu/H-6343-2015; Planinic, Mirko/E-8085-2012; Yoo,
In-Kwon/J-6222-2012; Peitzmann, Thomas/K-2206-2012; Witt,
Richard/H-3560-2012; Takahashi, Jun/B-2946-2012; Yip, Kin/D-6860-2013;
Xue, Liang/F-8077-2013; Voloshin, Sergei/I-4122-2013; Pandit,
Yadav/I-2170-2013; Tang, Zebo/A-9939-2014; Lednicky, Richard/K-4164-2013
OI Derradi de Souza, Rafael/0000-0002-2084-7001; Suaide,
Alexandre/0000-0003-2847-6556; Okorokov, Vitaly/0000-0002-7162-5345; Ma,
Yu-Gang/0000-0002-0233-9900; Yang, Yanyun/0000-0002-5982-1706; Xu,
Wenqin/0000-0002-5976-4991; Barnby, Lee/0000-0001-7357-9904; Alekseev,
Igor/0000-0003-3358-9635; Sumbera, Michal/0000-0002-0639-7323;
Strikhanov, Mikhail/0000-0003-2586-0405; Bruna,
Elena/0000-0001-5427-1461; Huang, Bingchu/0000-0002-3253-3210;
Peitzmann, Thomas/0000-0002-7116-899X; Takahashi,
Jun/0000-0002-4091-1779; Yip, Kin/0000-0002-8576-4311; Xue,
Liang/0000-0002-2321-9019; Pandit, Yadav/0000-0003-2809-7943; Tang,
Zebo/0000-0002-4247-0081;
FU Offices of NP and HEP within the U.S. DOE Office of Science; U.S. NSF;
Sloan Foundation; DFG cluster of excellence "Origin and Structure of the
Universe" of Germany; STFC of the United Kingdom; CNRS/IN2P3; FAPESP
CNPq of Brazil; Ministry of Ed. and Sci. of the Russian Federation;
NNSFC; CAS; MoST; MoE of China; GA of the Czech Republic; MSMT of the
Czech Republic; FOM of The Netherlands; NWO of The Netherlands; DAE;
DAE, DST; CSIR of India; Polish Ministry of Sci. and Higher Ed.; Korea
Research Foundation; Ministry of Sci., Ed. and Sports of the Rep. of
Croatia; RosAtom of Russia
FX We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at
LBNL and the Open Science Grid consortium for providing resources and
support. This work was supported in part by the Offices of NP and HEP
within the U.S. DOE Office of Science, the U.S. NSF, the Sloan
Foundation, the DFG cluster of excellence "Origin and Structure of the
Universe" of Germany, STFC of the United Kingdom, CNRS/IN2P3, FAPESP
CNPq of Brazil, Ministry of Ed. and Sci. of the Russian Federation,
NNSFC, CAS, MoST, and MoE of China, GA and MSMT of the Czech Republic,
FOM and NWO of The Netherlands, DAE, DST, and CSIR of India, Polish
Ministry of Sci. and Higher Ed., Korea Research Foundation, Ministry of
Sci., Ed. and Sports of the Rep. of Croatia, and RosAtom of Russia.
NR 48
TC 36
Z9 38
U1 0
U2 22
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 14
PY 2012
VL 108
IS 6
AR 072302
DI 10.1103/PhysRevLett.108.072302
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 891WI
UT WOS:000300247100003
PM 22401197
ER
PT J
AU Hu, X
Legler, PM
Khavrutskii, I
Scorpio, A
Compton, JR
Robertson, KL
Friedlander, AM
Wallqvist, A
AF Hu, Xin
Legler, Patricia M.
Khavrutskii, Ilja
Scorpio, Angelo
Compton, Jaimee R.
Robertson, Kelly L.
Friedlander, Arthur M.
Wallqvist, Anders
TI Probing the Donor and Acceptor Substrate Specificity of the
gamma-Glutamyl Transpeptidase
SO BIOCHEMISTRY
LA English
DT Article
ID HELICOBACTER-PYLORI; TRANSFERASE TRANSPEPTIDASE; ESCHERICHIA-COLI;
CRYSTAL-STRUCTURE; CATALYTIC MECHANISM; BACILLUS-SUBTILIS; AMINO-ACIDS;
EXPRESSION; CAPSULE; IDENTIFICATION
AB gamma-Glutamyl transpeptidase (GGT) is a two-substrate enzyme that plays a central role in glutathione metabolism and is a potential target for drug design. GGT catalyzes the cleavage of gamma-glutamyl donor substrates and the transfer of the gamma-glutamyl moiety to an amine of an acceptor substrate or water. Although structures of bacterial GGT have revealed details of the protein-ligand interactions at the donor site, the acceptor substrate site is relatively undefined. The recent identification of a species-specific acceptor site inhibitor, OU749, suggests that these inhibitors may be less toxic than glutamine analogues. Here we investigated the donor and acceptor substrate preferences of Bacillus anthracis GGT (CapD) and applied computational approaches in combination with kinetics to probe the structural basis of the enzyme's substrate and with human GGT. Site-directed mutagenesis studies showed that the R432A and R520S variants exhibited 6- and 95-fold decreases in hydrolase activity, respectively, and that their activity was not stimulated by the addition of the L-Cys acceptor substrate, suggesting an additional role in acceptor binding and/or catalysis of transpeptidation. Rat GGT (and presumably HuGGT) has strict stereospecificity for L-amino acid acceptor substrates, while CapD can utilize both L- and D-acceptor substrates comparably. Modeling and kinetic analysis suggest that R520 and R432 allow two alternate acceptor substrate binding modes for L- and D-acceptors. R432 is conserved in Francisella tularensis, Yersinia pestis, Burkholderia mallei, Helicobacter pylori and Escherichia coli, but not in human GGT. Docking and MD simulations point toward key residues that contribute to inhibitor and acceptor substrate binding, providing a guide to designing novel and specific GGT inhibitors.
C1 [Hu, Xin; Khavrutskii, Ilja; Wallqvist, Anders] USA, Med Res & Mat Command, Telemed & Adv Technol Res Ctr, Biotechnol HPC Software Applicat Inst, Ft Detrick, MD 21702 USA.
[Legler, Patricia M.; Compton, Jaimee R.; Robertson, Kelly L.] USN, Res Labs, Washington, DC 20375 USA.
[Scorpio, Angelo; Friedlander, Arthur M.] USA, Med Res Inst Infect Dis, Ft Detrick, MD 21702 USA.
RP Hu, X (reprint author), USA, Med Res & Mat Command, Telemed & Adv Technol Res Ctr, Biotechnol HPC Software Applicat Inst, Ft Detrick, MD 21702 USA.
EM xin.hu@nih.gov; patricia.legler@nrl.navy.mil
FU Defense Threat and Reduction Agency [2.10010.08.RD.B,
CBM.THERB.02.11.RD.012]; U.S. Department of Defense under the High
Performance Computing Software Applications Institutes initiative
FX This work was sponsored by Defense Threat and Reduction Agency Grants
2.10010.08.RD.B and CBM.THERB.02.11.RD.012 and the U.S. Department of
Defense High Performance Computing Modernization Program, under the High
Performance Computing Software Applications Institutes initiative.
NR 52
TC 20
Z9 20
U1 0
U2 10
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0006-2960
J9 BIOCHEMISTRY-US
JI Biochemistry
PD FEB 14
PY 2012
VL 51
IS 6
BP 1199
EP 1212
DI 10.1021/bi200987b
PG 14
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 890GK
UT WOS:000300132900015
PM 22257032
ER
PT J
AU Moses, WJ
Bowles, JH
Lucke, RL
Corson, MR
AF Moses, Wesley J.
Bowles, Jeffrey H.
Lucke, Robert L.
Corson, Michael R.
TI Impact of signal-to-noise ratio in a hyperspectral sensor on the
accuracy of biophysical parameter estimation in case II waters
SO OPTICS EXPRESS
LA English
DT Article
ID TURBID PRODUCTIVE WATERS; INHERENT OPTICAL-PROPERTIES; OCEAN COLOR;
CHLOROPHYLL-A; ATMOSPHERIC CORRECTION; REMOTE ESTIMATION; COASTAL
WATERS; ALGORITHM; SEAWIFS; MODEL
AB Errors in the estimated constituent concentrations in optically complex waters due solely to sensor noise in a spaceborne hyperspectral sensor can be as high as 80%. The goal of this work is to elucidate the effect of signal-to-noise ratio (SNR) on the accuracy of retrieved constituent concentrations. Large variations in the magnitude and spectral shape of the reflectances from coastal waters complicate the impact of SNR on the accuracy of estimation. Due to the low reflectance of water, the actual SNR encountered for a water target is usually quite lower than the prescribed SNR. The low SNR can be a significant source of error in the estimated constituent concentrations. Simulated and measured at-surface reflectances were used in this study. A radiative transfer code, Tafkaa, was used to propagate the at-surface reflectances up and down through the atmosphere. A sensor noise model based on that of the spaceborne hyperspectral sensor HICO was applied to the at-sensor radiances. Concentrations of chlorophyll-a, colored dissolved organic matter, and total suspended solids were estimated using an optimized error minimization approach and a few semi-analytical algorithms. Improving the SNR by reasonably modifying the sensor design can reduce estimation uncertainties by 10% or more. (C)2012 Optical Society of America
C1 [Moses, Wesley J.] USN, Res Lab, Natl Res Council, Washington, DC 20375 USA.
RP Moses, WJ (reprint author), USN, Res Lab, Natl Res Council, Washington, DC 20375 USA.
EM wesley.moses.ctr.in@nrl.navy.mil
OI Moses, Wesley/0000-0003-3551-6093
FU Office of Naval Research; National Research Council via the Naval
Research Laboratory
FX This research was supported by the Office of Naval Research and by the
National Research Council Associateship awarded to W. J. Moses via the
Naval Research Laboratory.
NR 51
TC 15
Z9 16
U1 1
U2 19
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD FEB 13
PY 2012
VL 20
IS 4
BP 4309
EP 4330
DI 10.1364/OE.20.004309
PG 22
WC Optics
SC Optics
GA 902MH
UT WOS:000301041900096
PM 22418190
ER
PT J
AU Joshi, A
Haynes, ND
Zelmon, DE
Stafsudd, O
Shori, R
AF Joshi, A.
Haynes, N. D.
Zelmon, D. E.
Stafsudd, O.
Shori, R.
TI Impurity concentration and temperature dependence of the refractive
indices of Er3+ doped ceramic Y2O3
SO OPTICS EXPRESS
LA English
DT Article
ID TRANSPARENT YTTRIA; LASER
AB The refractive indices and thermo-optic coefficients for varying concentrations of Er3+ doped polycrystalline yttria were measured at a variety of wavelengths and temperatures. A Lorenz oscillator model was employed to model the room temperature indices and thermo-optic coefficients were calculated based on temperature dependent index measurements from 0.45 to 1.064 microns. Some consequences relating to thermal lensing are discussed. (C)2012 Optical Society of America
C1 [Joshi, A.; Stafsudd, O.; Shori, R.] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA.
[Haynes, N. D.; Zelmon, D. E.] USAF, Res Lab, AFRL RXPS, Wright Patterson AFB, OH 45433 USA.
[Shori, R.] USN, Air Warfare Ctr, China Lake, CA USA.
RP Joshi, A (reprint author), Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA.
EM david.zelmon@wpafb.af.mil
NR 16
TC 4
Z9 4
U1 2
U2 14
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD FEB 13
PY 2012
VL 20
IS 4
BP 4428
EP 4435
DI 10.1364/OE.20.004428
PG 8
WC Optics
SC Optics
GA 902MH
UT WOS:000301041900108
PM 22418202
ER
PT J
AU Agakishiev, G
Aggarwal, MM
Ahammed, Z
Alakhverdyants, AV
Alekseev, I
Alford, J
Anderson, BD
Anson, CD
Arkhipkin, D
Averichev, GS
Balewski, J
Barnby, LS
Beavis, DR
Behera, NK
Bellwied, R
Betancourt, MJ
Betts, RR
Bhasin, A
Bhati, AK
Bichsel, H
Bielcik, J
Bielcikova, J
Bland, LC
Bordyuzhin, IG
Borowski, W
Bouchet, J
Braidot, E
Brandin, AV
Bridgeman, A
Brovko, SG
Bruna, E
Bueltmann, S
Bunzarov, I
Burton, TP
Cai, XZ
Caines, H
Sanchez, MCD
Cebra, D
Cendejas, R
Cervantes, MC
Chaloupka, P
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Chen, L
Cheng, J
Cherney, M
Chikanian, A
Choi, KE
Christie, W
Chung, P
Codrington, MJM
Corliss, R
Cramer, JG
Crawford, HJ
Cui, X
Leyva, AD
De Silva, LC
Debbe, RR
Dedovich, TG
Deng, J
Derevschikov, AA
de Souza, RD
Didenko, L
Djawotho, P
Dogra, SM
Dong, X
Drachenberg, JL
Draper, JE
Du, CM
Dunlop, JC
Efimov, LG
Elnimr, M
Engelage, J
Eppley, G
Estienne, M
Eun, L
Evdokimov, O
Fatemi, R
Fedorisin, J
Fersch, RG
Filip, P
Finch, E
Fine, V
Fisyak, Y
Gagliardi, CA
Gangadharan, DR
Geurts, F
Ghosh, P
Gorbunov, YN
Gordon, A
Grebenyuk, OG
Grosnick, D
Gupta, A
Gupta, S
Guryn, W
Haag, B
Hajkova, O
Hamed, A
Han, LX
Harris, JW
Hays-Wehle, JP
Heinz, M
Heppelmann, S
Hirsch, A
Hjort, E
Hoffmann, GW
Hofman, DJ
Huang, B
Huang, HZ
Humanic, TJ
Huo, L
Igo, G
Jacobs, P
Jacobs, WW
Jena, C
Jin, F
Jones, PG
Joseph, J
Judd, EG
Kabana, S
Kang, K
Kapitan, J
Kauder, K
Ke, HW
Keane, D
Kechechyan, A
Kettler, D
Kikola, DP
Kiryluk, J
Kisiel, A
Kizka, V
Klein, SR
Knospe, AG
Koetke, DD
Kollegger, T
Konzer, J
Koralt, I
Koroleva, L
Korsch, W
Kotchenda, L
Kouchpil, V
Kravtsov, P
Krueger, K
Krus, M
Kumar, L
Lamont, MAC
Landgraf, JM
LaPointe, S
Lauret, J
Lebedev, A
Lednicky, R
Lee, JH
Leight, W
LeVine, MJ
Li, C
Li, L
Li, N
Li, W
Li, X
Li, X
Li, Y
Li, ZM
Lima, LM
Lisa, MA
Liu, F
Liu, H
Liu, J
Ljubicic, T
Llope, WJ
Longacre, RS
Lu, Y
Lukashov, EV
Luo, X
Ma, GL
Ma, YG
Mahapatra, DP
Majka, R
Mall, OI
Manweiler, R
Margetis, S
Markert, C
Masui, H
Matis, HS
McDonald, D
McShane, TS
Meschanin, A
Milner, R
Minaev, NG
Mioduszewski, S
Mitrovski, MK
Mohammed, Y
Mohanty, B
Mondal, MM
Morozov, B
Morozov, DA
Munhoz, MG
Mustafa, MK
Naglis, M
Nandi, BK
Nayak, TK
Nelson, JM
Nogach, LV
Nurushev, SB
Odyniec, G
Ogawa, A
Oh, K
Ohlson, A
Okorokov, V
Oldag, EW
Oliveira, RAN
Olson, D
Pachr, M
Page, BS
Pal, SK
Pandit, Y
Panebratsev, Y
Pawlak, T
Pei, H
Peitzmann, T
Perkins, C
Peryt, W
Pile, P
Planinic, M
Ploskon, MA
Pluta, J
Plyku, D
Poljak, N
Porter, J
Poskanzer, AM
Potukuchi, BVKS
Powell, CB
Prindle, D
Pruneau, C
Pruthi, NK
Pujahari, PR
Putschke, J
Qiu, H
Raniwala, R
Raniwala, S
Ray, RL
Redwine, R
Reed, R
Ritter, HG
Roberts, JB
Rogachevskiy, OV
Romero, JL
Ruan, L
Rusnak, J
Sahoo, NR
Sakrejda, I
Salur, S
Sandweiss, J
Sangaline, E
Sarkar, A
Schambach, J
Scharenberg, RP
Schaub, J
Schmah, AM
Schmitz, N
Schuster, TR
Seele, J
Seger, J
Selyuzhenkov, I
Seyboth, P
Shah, N
Shahaliev, E
Shao, M
Sharma, M
Shi, SS
Shou, QY
Sichtermann, EP
Simon, F
Singaraju, RN
Skoby, MJ
Smirnov, N
Solanki, D
Sorensen, P
deSouza, UG
Spinka, HM
Srivastava, B
Stanislaus, TDS
Steadman, SG
Stevens, JR
Stock, R
Strikhanov, M
Stringfellow, B
Suaide, AAP
Suarez, MC
Subba, NL
Sumbera, M
Sun, XM
Sun, Y
Sun, Z
Surrow, B
Svirida, DN
Symons, TJM
de Toledo, AS
Takahashi, J
Tang, AH
Tang, Z
Tarini, LH
Tarnowsky, T
Thein, D
Thomas, JH
Tian, J
Timmins, AR
Tlusty, D
Tokarev, M
Trainor, TA
Trentalange, S
Tribble, RE
Tribedy, P
Trzeciak, BA
Tsai, OD
Ullrich, T
Underwood, DG
Van Buren, G
van Nieuwenhuizen, G
Vanfossen, JA
Varma, R
Vasconcelos, GMS
Vasiliev, AN
Videbaek, F
Viyogi, YP
Vokal, S
Voloshin, SA
Wada, M
Walker, M
Wang, F
Wang, G
Wang, H
Wang, JS
Wang, Q
Wang, XL
Wang, Y
Webb, G
Webb, JC
Westfall, GD
Whitten, C
Wieman, H
Wissink, SW
Witt, R
Witzke, W
Wu, YF
Xiao, Z
Xie, W
Xu, H
Xu, N
Xu, QH
Xu, W
Xu, Y
Xu, Z
Xue, L
Yang, Y
Yang, Y
Yepes, P
Yip, K
Yoo, IK
Zawisza, M
Zbroszczyk, H
Zhan, W
Zhang, JB
Zhang, S
Zhang, WM
Zhang, XP
Zhang, Y
Zhang, ZP
Zhao, F
Zhao, J
Zhong, C
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Zhu, YH
Zoulkarneeva, Y
AF Agakishiev, G.
Aggarwal, M. M.
Ahammed, Z.
Alakhverdyants, A. V.
Alekseev, I.
Alford, J.
Anderson, B. D.
Anson, C. D.
Arkhipkin, D.
Averichev, G. S.
Balewski, J.
Barnby, L. S.
Beavis, D. R.
Behera, N. K.
Bellwied, R.
Betancourt, M. J.
Betts, R. R.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Bland, L. C.
Bordyuzhin, I. G.
Borowski, W.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Bridgeman, A.
Brovko, S. G.
Bruna, E.
Bueltmann, S.
Bunzarov, I.
Burton, T. P.
Cai, X. Z.
Caines, H.
de la Barca Sanchez, M. Calderon
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Chen, L.
Cheng, J.
Cherney, M.
Chikanian, A.
Choi, K. E.
Christie, W.
Chung, P.
Codrington, M. J. M.
Corliss, R.
Cramer, J. G.
Crawford, H. J.
Cui, X.
Leyva, A. Davila
De Silva, L. C.
Debbe, R. R.
Dedovich, T. G.
Deng, J.
Derevschikov, A. A.
Derradi de Souza, R.
Didenko, L.
Djawotho, P.
Dogra, S. M.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Du, C. M.
Dunlop, J. C.
Efimov, L. G.
Elnimr, M.
Engelage, J.
Eppley, G.
Estienne, M.
Eun, L.
Evdokimov, O.
Fatemi, R.
Fedorisin, J.
Fersch, R. G.
Filip, P.
Finch, E.
Fine, V.
Fisyak, Y.
Gagliardi, C. A.
Gangadharan, D. R.
Geurts, F.
Ghosh, P.
Gorbunov, Y. N.
Gordon, A.
Grebenyuk, O. G.
Grosnick, D.
Gupta, A.
Gupta, S.
Guryn, W.
Haag, B.
Hajkova, O.
Hamed, A.
Han, L-X
Harris, J. W.
Hays-Wehle, J. P.
Heinz, M.
Heppelmann, S.
Hirsch, A.
Hjort, E.
Hoffmann, G. W.
Hofman, D. J.
Huang, B.
Huang, H. Z.
Humanic, T. J.
Huo, L.
Igo, G.
Jacobs, P.
Jacobs, W. W.
Jena, C.
Jin, F.
Jones, P. G.
Joseph, J.
Judd, E. G.
Kabana, S.
Kang, K.
Kapitan, J.
Kauder, K.
Ke, H. W.
Keane, D.
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Kiryluk, J.
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Kizka, V.
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Knospe, A. G.
Koetke, D. D.
Kollegger, T.
Konzer, J.
Koralt, I.
Koroleva, L.
Korsch, W.
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Kouchpil, V.
Kravtsov, P.
Krueger, K.
Krus, M.
Kumar, L.
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LaPointe, S.
Lauret, J.
Lebedev, A.
Lednicky, R.
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Leight, W.
LeVine, M. J.
Li, C.
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Lisa, M. A.
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Longacre, R. S.
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Luo, X.
Ma, G. L.
Ma, Y. G.
Mahapatra, D. P.
Majka, R.
Mall, O. I.
Manweiler, R.
Margetis, S.
Markert, C.
Masui, H.
Matis, H. S.
McDonald, D.
McShane, T. S.
Meschanin, A.
Milner, R.
Minaev, N. G.
Mioduszewski, S.
Mitrovski, M. K.
Mohammed, Y.
Mohanty, B.
Mondal, M. M.
Morozov, B.
Morozov, D. A.
Munhoz, M. G.
Mustafa, M. K.
Naglis, M.
Nandi, B. K.
Nayak, T. K.
Nelson, J. M.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Oh, K.
Ohlson, A.
Okorokov, V.
Oldag, E. W.
Oliveira, R. A. N.
Olson, D.
Pachr, M.
Page, B. S.
Pal, S. K.
Pandit, Y.
Panebratsev, Y.
Pawlak, T.
Pei, H.
Peitzmann, T.
Perkins, C.
Peryt, W.
Pile, P.
Planinic, M.
Ploskon, M. A.
Pluta, J.
Plyku, D.
Poljak, N.
Porter, J.
Poskanzer, A. M.
Potukuchi, B. V. K. S.
Powell, C. B.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Pujahari, P. R.
Putschke, J.
Qiu, H.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Redwine, R.
Reed, R.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Ruan, L.
Rusnak, J.
Sahoo, N. R.
Sakrejda, I.
Salur, S.
Sandweiss, J.
Sangaline, E.
Sarkar, A.
Schambach, J.
Scharenberg, R. P.
Schaub, J.
Schmah, A. M.
Schmitz, N.
Schuster, T. R.
Seele, J.
Seger, J.
Selyuzhenkov, I.
Seyboth, P.
Shah, N.
Shahaliev, E.
Shao, M.
Sharma, M.
Shi, S. S.
Shou, Q. Y.
Sichtermann, E. P.
Simon, F.
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Solanki, D.
Sorensen, P.
deSouza, U. G.
Spinka, H. M.
Srivastava, B.
Stanislaus, T. D. S.
Steadman, S. G.
Stevens, J. R.
Stock, R.
Strikhanov, M.
Stringfellow, B.
Suaide, A. A. P.
Suarez, M. C.
Subba, N. L.
Sumbera, M.
Sun, X. M.
Sun, Y.
Sun, Z.
Surrow, B.
Svirida, D. N.
Symons, T. J. M.
Szanto de Toledo, A.
Takahashi, J.
Tang, A. H.
Tang, Z.
Tarini, L. H.
Tarnowsky, T.
Thein, D.
Thomas, J. H.
Tian, J.
Timmins, A. R.
Tlusty, D.
Tokarev, M.
Trainor, T. A.
Trentalange, S.
Tribble, R. E.
Tribedy, P.
Trzeciak, B. A.
Tsai, O. D.
Ullrich, T.
Underwood, D. G.
Van Buren, G.
van Nieuwenhuizen, G.
Vanfossen, J. A., Jr.
Varma, R.
Vasconcelos, G. M. S.
Vasiliev, A. N.
Videbaek, F.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Wada, M.
Walker, M.
Wang, F.
Wang, G.
Wang, H.
Wang, J. S.
Wang, Q.
Wang, X. L.
Wang, Y.
Webb, G.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wissink, S. W.
Witt, R.
Witzke, W.
Wu, Y. F.
Xiao, Z.
Xie, W.
Xu, H.
Xu, N.
Xu, Q. H.
Xu, W.
Xu, Y.
Xu, Z.
Xue, L.
Yang, Y.
Yang, Y.
Yepes, P.
Yip, K.
Yoo, I-K
Zawisza, M.
Zbroszczyk, H.
Zhan, W.
Zhang, J. B.
Zhang, S.
Zhang, W. M.
Zhang, X. P.
Zhang, Y.
Zhang, Z. P.
Zhao, F.
Zhao, J.
Zhong, C.
Zhu, X.
Zhu, Y. H.
Zoulkarneeva, Y.
CA Star Collaboration
TI Strangeness Enhancement in Cu-Cu and Au-Au Collisions at root s(NN)=200
GeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DEPENDENCE; PARTICLE; ENERGY
AB We report new STAR measurements of midrapidity yields for the Lambda, (Lambda) over bar, K-S(0), Xi(-), (Xi) over bar (+), Omega(-), (Omega) over bar (+) particles in Cu + Cu collisions at root s(NN) = 200 GeV, and midrapidity yields for the Lambda, (Lambda) over bar, K-S(0) particles in Au + Au at root s(NN) = 200 GeV. We show that, at a given number of participating nucleons, the production of strange hadrons is higher in Cu + Cu collisions than in Au + Au collisions at the same center-of-mass energy. We find that aspects of the enhancement factors for all particles can be described by a parametrization based on the fraction of participants that undergo multiple collisions.
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[Bridgeman, A.; Krueger, K.; Spinka, H. M.; Underwood, D. G.] Argonne Natl Lab, Argonne, IL 60439 USA.
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[Braidot, E.; Peitzmann, T.] NIKHEF, Amsterdam, Netherlands.
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RP Agakishiev, G (reprint author), Joint Inst Nucl Res, Dubna 141980, Russia.
RI Svirida, Dmitry/R-4909-2016; Inst. of Physics, Gleb
Wataghin/A-9780-2017; Okorokov, Vitaly/C-4800-2017; Ma,
Yu-Gang/M-8122-2013; Xu, Wenqin/H-7553-2014; Barnby, Lee/G-2135-2010;
Alekseev, Igor/J-8070-2014; Sumbera, Michal/O-7497-2014; Strikhanov,
Mikhail/P-7393-2014; XIAO, Zhigang/C-3788-2015; Aparecido Negrao de
Oliveira, Renato/G-9133-2015; Bruna, Elena/C-4939-2014; Dogra, Sunil
/B-5330-2013; Chaloupka, Petr/E-5965-2012; Huang, Bingchu/H-6343-2015;
Derradi de Souza, Rafael/M-4791-2013; Suaide, Alexandre/L-6239-2016;
Yip, Kin/D-6860-2013; Planinic, Mirko/E-8085-2012; Yoo,
In-Kwon/J-6222-2012; Peitzmann, Thomas/K-2206-2012; Witt,
Richard/H-3560-2012; Xue, Liang/F-8077-2013; Voloshin,
Sergei/I-4122-2013; Pandit, Yadav/I-2170-2013; Lednicky,
Richard/K-4164-2013; Yang, Yanyun/B-9485-2014; Rusnak, Jan/G-8462-2014;
Takahashi, Jun/B-2946-2012; Bielcikova, Jana/G-9342-2014
OI Okorokov, Vitaly/0000-0002-7162-5345; Ma, Yu-Gang/0000-0002-0233-9900;
Bhasin, Anju/0000-0002-3687-8179; Xu, Wenqin/0000-0002-5976-4991;
Barnby, Lee/0000-0001-7357-9904; Alekseev, Igor/0000-0003-3358-9635;
Sumbera, Michal/0000-0002-0639-7323; Strikhanov,
Mikhail/0000-0003-2586-0405; Bruna, Elena/0000-0001-5427-1461; Huang,
Bingchu/0000-0002-3253-3210; Derradi de Souza,
Rafael/0000-0002-2084-7001; Suaide, Alexandre/0000-0003-2847-6556; Yip,
Kin/0000-0002-8576-4311; Peitzmann, Thomas/0000-0002-7116-899X; Xue,
Liang/0000-0002-2321-9019; Pandit, Yadav/0000-0003-2809-7943; Yang,
Yanyun/0000-0002-5982-1706; Takahashi, Jun/0000-0002-4091-1779;
FU RHIC Operations Group; RCF at BNL; NERSC Center at LBNL; Open Science
Grid consortium; Offices of NP; HEP within the U.S. DOE Office of
Science; U.S. NSF, the Sloan Foundation; DFG cluster of excellence
"Origin and Structure of the Universe" of Germany; CNRS/IN2P3; STFC;
EPSRC of the U.K.; FAPESP CNPq of Brazil; Ministry of Ed. and Sci. of
the Russian Federation; NNSFC; CAS; MoST; MoE of China; GA; MSMT of the
Czech Republic; FOM; NWO of the Netherlands; DAE; DST; CSIR of India;
Polish Ministry of Sci. and Higher Ed.; Korea Research Foundation;
Ministry of Sci., Ed. and Sports of the Rep. of Croatia; RosAtom of
Russia
FX We thank Klaus Werner, Joerg Aichelin, Francesco Becattini, and Bin
Zhang for discussions, the RHIC Operations Group and RCF at BNL, the
NERSC Center at LBNL, and the Open Science Grid consortium for providing
resources and support. This work was supported in part by the Offices of
NP and HEP within the U.S. DOE Office of Science, the U.S. NSF, the
Sloan Foundation, the DFG cluster of excellence "Origin and Structure of
the Universe" of Germany, CNRS/IN2P3, STFC, and EPSRC of the U.K.,
FAPESP CNPq of Brazil, Ministry of Ed. and Sci. of the Russian
Federation, NNSFC, CAS, MoST, and MoE of China, GA and MSMT of the Czech
Republic, FOM and NWO of the Netherlands, DAE, DST, and CSIR of India,
Polish Ministry of Sci. and Higher Ed., Korea Research Foundation,
Ministry of Sci., Ed. and Sports of the Rep. of Croatia, and RosAtom of
Russia.
NR 26
TC 41
Z9 42
U1 2
U2 23
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 13
PY 2012
VL 108
IS 6
AR 072301
DI 10.1103/PhysRevLett.108.072301
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 891VX
UT WOS:000300246000007
PM 22401196
ER
PT J
AU Oran, ES
Williams, FA
AF Oran, Elaine S.
Williams, Forman A.
TI The physics, chemistry and dynamics of explosions PREFACE
SO PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL
AND ENGINEERING SCIENCES
LA English
DT Editorial Material
C1 [Oran, Elaine S.] USN, Res Lab, Labs Computat Phys & Fluid Dynam, Washington, DC 20375 USA.
[Williams, Forman A.] Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA.
RP Oran, ES (reprint author), USN, Res Lab, Labs Computat Phys & Fluid Dynam, Washington, DC 20375 USA.
EM oran@lcp.nrl.navy.mil
NR 0
TC 1
Z9 1
U1 0
U2 1
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 1364-503X
J9 PHILOS T R SOC A
JI Philos. Trans. R. Soc. A-Math. Phys. Eng. Sci.
PD FEB 13
PY 2012
VL 370
IS 1960
SI SI
BP 533
EP 533
DI 10.1098/rsta.2011.0438
PG 1
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 873MT
UT WOS:000298888100001
ER
PT J
AU Oran, ES
Williams, FA
AF Oran, Elaine S.
Williams, Forman A.
TI The physics, chemistry and dynamics of explosions INTRODUCTION
SO PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL
AND ENGINEERING SCIENCES
LA English
DT Editorial Material
DE explosion; detonation; deflagration; deflagration-to-detonation
transition; turbulent reacting flows; astrophysical explosions
ID DETONATION PROPAGATION; SYSTEMS
AB The motivation for devoting a Theme Issue to explosions is discussed. As subsequent articles in the issue are written with the assumption that the reader has had a certain amount of previous exposure to the subject, some of the history and necessary background information are presented here. The topics on explosions that will be encountered in the remaining articles are previewed. Finally, several important future outstanding research problems, beyond those addressed in the following articles, are discussed, with the objective of complementing the coverage of explosions in this issue.
C1 [Oran, Elaine S.] USN, Res Lab, Labs Computat Phys & Fluid Dynam, Washington, DC 20375 USA.
[Williams, Forman A.] Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA.
RP Oran, ES (reprint author), USN, Res Lab, Labs Computat Phys & Fluid Dynam, Washington, DC 20375 USA.
EM oran@lcp.nrl.navy.mil
NR 24
TC 4
Z9 4
U1 0
U2 2
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 1364-503X
EI 1471-2962
J9 PHILOS T R SOC A
JI Philos. Trans. R. Soc. A-Math. Phys. Eng. Sci.
PD FEB 13
PY 2012
VL 370
IS 1960
SI SI
BP 534
EP 543
DI 10.1098/rsta.2011.0385
PG 10
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 873MT
UT WOS:000298888100002
PM 22213658
ER
PT J
AU Kessler, DA
Gamezo, VN
Oran, ES
AF Kessler, D. A.
Gamezo, V. N.
Oran, E. S.
TI Gas-phase detonation propagation in mixture composition gradients
SO PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL
AND ENGINEERING SCIENCES
LA English
DT Article
DE detonation; cellular structure; concentration gradient; triple points;
partially premixed; methane
ID METHANE-AIR MIXTURES; TRIPLE FLAME; TRANSMISSION; SIMULATIONS;
PREDICTION; BEHAVIOR; KINETICS; MODEL; DDT
AB The propagation of detonations through several fuel-air mixtures with spatially varying fuel concentrations is examined numerically. The detonations propagate through two-dimensional channels, inside of which the gradient of mixture composition is oriented normal to the direction of propagation. The simulations are performed using a two-component, single-step reaction model calibrated so that one-dimensional detonation properties of model low- and high-activation-energy mixtures are similar to those observed in a typical hydrocarbon-air mixture. In the low-activation-energy mixture, the reaction zone structure is complex, consisting of curved fuel-lean and fuel-rich detonations near the line of stoichiometry that transition to decoupled shocks and turbulent deflagrations near the channel walls where the mixture is extremely fuel-lean or fuel-rich. Reactants that are not consumed by the leading detonation combine downstream and burn in a diffusion flame. Detonation cells produced by the unstable reaction front vary in size across the channel, growing larger away from the line of stoichiometry. As the size of the channel decreases relative to the size of a detonation cell, the effect of the mixture composition gradient is lessened and cells of similar sizes form. In the high-activation-energy mixture, detonations propagate more slowly as the magnitude of the mixture composition gradient is increased and can be quenched in a large enough gradient.
C1 [Kessler, D. A.; Gamezo, V. N.; Oran, E. S.] USN, Res Lab, Lab Computat Phys & Fluid Dynam, Washington, DC 20375 USA.
RP Kessler, DA (reprint author), USN, Res Lab, Lab Computat Phys & Fluid Dynam, Washington, DC 20375 USA.
EM dakessle@lcp.nrl.navy.mil
NR 43
TC 11
Z9 12
U1 0
U2 20
PU ROYAL SOC
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 1364-503X
J9 PHILOS T R SOC A
JI Philos. Trans. R. Soc. A-Math. Phys. Eng. Sci.
PD FEB 13
PY 2012
VL 370
IS 1960
SI SI
BP 567
EP 596
DI 10.1098/rsta.2011.0342
PG 30
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 873MT
UT WOS:000298888100004
PM 22213660
ER
PT J
AU Radko, T
Smith, DP
AF Radko, Timour
Smith, D. Paul
TI Equilibrium transport in double-diffusive convection
SO JOURNAL OF FLUID MECHANICS
LA English
DT Article
DE double diffusive convection; instability; ocean processes
ID STRATIFIED KOLMOGOROV FLOW; SUGAR-SALT FINGERS; THERMOHALINE STAIRCASE;
BETA-PLANE; INSTABILITY; STABILITY; LAYER; FLUXES; FLUID; THERMOCLINE
AB A theoretical model for the equilibrium double-diffusive transport is presented which emphasizes the role of secondary instabilities of salt fingers in saturation of their linear growth. Theory assumes that the fully developed equilibrium state is characterized by the comparable growth rates of primary and secondary instabilities. This assumption makes it possible to formulate an efficient algorithm for computing diffusivities of heat and salt as a function of the background property gradients and molecular parameters. The model predicts that the double-diffusive transport of heat and salt rapidly intensifies with decreasing density ratio. Fluxes are less sensitive to molecular characteristics, mildly increasing with Prandtl number. (Pr) and decreasing with diffusivity ratio (tau). Theory is successfully tested by a series of direct numerical simulations which span a wide range of Pr and tau.
C1 [Radko, Timour; Smith, D. Paul] USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
RP Radko, T (reprint author), USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
EM tradko@nps.edu
FU National Science Foundation [OCE 0547650, AST 0806431, CBET 0933057, ANT
0944536]
FX The authors thank J. Flanagan, R. Schmitt, W. Smyth and reviewers for
helpful comments. Support by the National Science Foundation (grants OCE
0547650, AST 0806431, CBET 0933057 and ANT 0944536) is gratefully
acknowledged.
NR 52
TC 20
Z9 20
U1 0
U2 7
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-1120
J9 J FLUID MECH
JI J. Fluid Mech.
PD FEB 10
PY 2012
VL 692
BP 5
EP 27
DI 10.1017/jfm.2011.343
PG 23
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 886WA
UT WOS:000299883400002
ER
PT J
AU Lifson, AR
Krantz, EM
Grambsch, PL
Macalino, GE
Crum-Cianflone, NF
Ganesan, A
Okulicz, JF
Eaton, A
Powers, JH
Eberly, LE
Agan, BK
AF Lifson, Alan R.
Krantz, Elizabeth M.
Grambsch, Patricia L.
Macalino, Grace E.
Crum-Cianflone, Nancy F.
Ganesan, Anuradha
Okulicz, Jason F.
Eaton, Anne
Powers, John H.
Eberly, Lynn E.
Agan, Brian K.
CA Infect Dis Clinical Res Program
TI Clinical, demographic and laboratory parameters at HAART initiation
associated with decreased post-HAART survival in a US military
prospective HIV cohort
SO AIDS RESEARCH AND THERAPY
LA English
DT Article
DE Highly active antiretroviral therapy; mortality; CD4+lymphocyte count
ID STARTING ANTIRETROVIRAL THERAPY; HUMAN-IMMUNODEFICIENCY-VIRUS;
HEPATITIS-C VIRUS; COLLABORATIVE ANALYSIS; INFECTED INDIVIDUALS; CELL
COUNT; MORTALITY; AIDS; DETERMINANTS; PROGNOSIS
AB Background: Although highly active antiretroviral therapy (HAART) has improved HIV survival, some patients receiving therapy are still dying. This analysis was conducted to identify factors associated with increased risk of post-HAART mortality.
Methods: We evaluated baseline (prior to HAART initiation) clinical, demographic and laboratory factors (including CD4+ count and HIV RNA level) for associations with subsequent mortality in 1,600 patients who began HAART in a prospective observational cohort of HIV-infected U.S. military personnel.
Results: Cumulative mortality was 5%, 10% and 18% at 4, 8 and 12 years post-HAART. Mortality was highest (6.23 deaths/100 person-years [PY]) in those with <= 50 CD4+ cells/mm(3) before HAART initiation, and became progressively lower as CD4+ counts increased (0.70/100 PY with >= 500 CD4+ cells/mm(3)). In multivariate analysis, factors significantly (p < 0.05) associated with post-HAART mortality included: increasing age among those >= 40 years (Hazard ratio [HR] = 1.32 per 5 year increase), clinical AIDS events before HAART (HR = 1.93), <= 50 CD4+ cells/mm(3) (vs. CD4+ >= 500, HR = 2.97), greater HIV RNA level (HR = 1.36 per one log(10) increase), hepatitis C antibody or chronic hepatitis B (HR = 1.96), and HIV diagnosis before 1996 (HR = 2.44). Baseline CD4+ = 51-200 cells (HR = 1.74, p = 0.06), and hemoglobin < 12 gm/dL for women or < 13.5 for men (HR = 1.36, p = 0.07) were borderline significant.
Conclusions: Although treatment has improved HIV survival, defining those at greatest risk for death after HAART initiation, including demographic, clinical and laboratory correlates of poorer prognoses, can help identify a subset of patients for whom more intensive monitoring, counseling, and care interventions may improve clinical outcomes and post-HAART survival.
C1 [Lifson, Alan R.] Univ Minnesota, Div Epidemiol & Community Hlth, Minneapolis, MN 55455 USA.
[Krantz, Elizabeth M.; Grambsch, Patricia L.; Eaton, Anne; Eberly, Lynn E.] Univ Minnesota, Div Biostat, Minneapolis, MN USA.
[Lifson, Alan R.; Krantz, Elizabeth M.; Grambsch, Patricia L.; Macalino, Grace E.; Crum-Cianflone, Nancy F.; Ganesan, Anuradha; Okulicz, Jason F.; Eberly, Lynn E.; Agan, Brian K.] Uniformed Serv Univ Hlth Sci, Infect Dis Clin Res Program, Bethesda, MD 20814 USA.
[Crum-Cianflone, Nancy F.] USN, San Diego Med Ctr, San Diego, CA 92152 USA.
[Ganesan, Anuradha] Natl Naval Med Ctr, Bethesda, MD USA.
[Okulicz, Jason F.] San Antonio Mil Med Ctr, Infect Dis Serv, San Antonio, TX USA.
[Powers, John H.] NIAID, NIH, Bethesda, MD 20892 USA.
RP Lifson, AR (reprint author), Univ Minnesota, Div Epidemiol & Community Hlth, Minneapolis, MN 55455 USA.
EM lifso001@umn.edu; bagan@idcrp.org
OI Polis, Michael/0000-0002-9151-2268; Agan, Brian/0000-0002-5114-1669;
Eberly, Lynn/0000-0003-4763-330X
FU U.S. Government; Infectious Disease Clinical Research Program
[IDCRP-000-14]; Department of Defense (DoD) program executed through the
Uniformed Services University of the Health Sciences; National Institute
of Allergy and Infectious Diseases, National Institutes of Health (NIH)
[Y1-AI-5072]
FX Additional members of the Infectious Disease Clinical Research Program
HIV/ STI Working Group include Susan Banks, Mary Bavaro, Helen Chun,
Cathy Decker, Connor Eggleston, Susan Fraser, Joshua Hartzell, Gunther
Hsue, Arthur Johnson, Mark Kortepeter, Tahaniyat Lalani, Michael
Landrum, Michelle Linfesty, Scott Merritt, Robert O'Connell, Sheila
Peel, Michael Polis, Roseanne Ressnerk, Edmund Tramont, Tyler
Warkentien, Paige Waterman, Amy Weintrob, Timothy Whitman, Glenn
Wortmann, and Michael Zapor. The content and views expressed in this
publication is the sole responsibility of the authors and does not
necessarily reflect the views or policies of the NIH or the Department
of Health and Human Services, the DoD or the Departments of the Army,
Navy, Air Force, Department of Defense, nor the U. S. Government.
Mention of trade names, commercial products, or organizations does not
imply endorsement by the U.S. Government. Support for this work
(IDCRP-000-14) was provided by the Infectious Disease Clinical Research
Program, a Department of Defense (DoD) program executed through the
Uniformed Services University of the Health Sciences. This project has
been funded in whole, or in part, with federal funds from the National
Institute of Allergy and Infectious Diseases, National Institutes of
Health (NIH), under Inter-Agency Agreement Y1-AI-5072.
NR 25
TC 4
Z9 4
U1 0
U2 2
PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 1742-6405
J9 AIDS RES THER
JI Aids Res. Ther.
PD FEB 10
PY 2012
VL 9
AR 4
DI 10.1186/1742-6405-9-4
PG 7
WC Infectious Diseases
SC Infectious Diseases
GA 072RD
UT WOS:000313689000001
PM 22339893
ER
PT J
AU Beers, TC
Carollo, D
Ivezic, Z
An, D
Chiba, M
Norris, JE
Freeman, KC
Lee, YS
Munn, JA
Fiorentin, PR
Sivarani, T
Wilhelm, R
Yanny, B
York, DG
AF Beers, Timothy C.
Carollo, Daniela
Ivezic, Zeljko
An, Deokkeun
Chiba, Masashi
Norris, John E.
Freeman, Ken C.
Lee, Young Sun
Munn, Jeffrey A.
Fiorentin, Paola Re
Sivarani, Thirupathi
Wilhelm, Ronald
Yanny, Brian
York, Donald G.
TI THE CASE FOR THE DUAL HALO OF THE MILKY WAY
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Galaxy: evolution; Galaxy: formation; Galaxy: halo; Galaxy: kinematics
and dynamics; Galaxy: structure; surveys
ID DIGITAL SKY SURVEY; HORIZONTAL-BRANCH STARS; METAL-POOR STARS; VELOCITY
EXPERIMENT RAVE; STELLAR EVOLUTION DATABASE; RR LYRAE STARS; GALACTIC
HALO; DATA RELEASE; OPEN CLUSTERS; POPULATION SYNTHESIS
AB Carollo et al. have recently resolved the stellar population of the Milky Way halo into at least two distinct components, an inner halo and an outer halo. This result has been criticized by Schonrich et al., who claim that the retrograde signature associated with the outer halo is due to the adoption of faulty distances. We refute this claim, and demonstrate that the Schonrich et al. photometric distances are themselves flawed because they adopted an incorrect main-sequence absolute magnitude relationship from the work of Ivezic et al. When compared to the recommended relation from Ivezic et al., which is tied to a Milky Way globular cluster distance scale and accounts for age and metallicity effects, the relation adopted by Schonrich et al. yields up to 18% shorter distances for stars near the main-sequence turnoff (TO). Use of the correct relationship yields agreement between the distances assigned by Carollo et al. and Ivezic et al. for low-metallicity dwarfs to within 6%-10%. Schonrich et al. also point out that intermediate-gravity stars (3.5 <= logg < 4.0) with colors redder than the TO region are likely misclassified, with which we concur. We implement a new procedure to reassign luminosity classifications for the TO stars that require it. New derivations of the rotational behavior demonstrate that the retrograde signature and high velocity dispersion of the outer-halo population remain. We summarize additional lines of evidence for a dual halo, including a test of the retrograde signature based on proper motions alone, and conclude that the preponderance of evidence strongly rejects the single-halo interpretation.
C1 [Beers, Timothy C.; Lee, Young Sun] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
[Beers, Timothy C.; Lee, Young Sun] Michigan State Univ, JINA, E Lansing, MI 48824 USA.
[Beers, Timothy C.] Natl Opt Astron Observ, Tucson, AZ 85719 USA.
[Carollo, Daniela; Norris, John E.; Freeman, Ken C.] Australian Natl Univ, Res Sch Astron & Astrophys, Mt Stromlo Observ, Weston, ACT 2611, Australia.
[Carollo, Daniela] Macquarie Univ, Dept Phys & Astron, Sydney, NSW 2109, Australia.
[Ivezic, Zeljko] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
[An, Deokkeun] Ewha Womans Univ, Dept Sci Educ, Seoul 120750, South Korea.
[Chiba, Masashi] Tohoku Univ, Astron Inst, Sendai, Miyagi 9808578, Japan.
[Munn, Jeffrey A.] USN Observ, Flagstaff Stn, Flagstaff, AZ 86001 USA.
[Fiorentin, Paola Re] INAF Osservatorio Astron Torino, I-10025 Pino Torinese, Italy.
[Sivarani, Thirupathi] Indian Inst Astrophys, Bangalore 560034, Karnataka, India.
[Wilhelm, Ronald] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
[Yanny, Brian] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
[York, Donald G.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
RP Beers, TC (reprint author), Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
EM beers@pa.msu.edu; carollo@mso.anu.edu.au; ivezic@astro.washington.edu;
deokkeun@ewha.ac.kr; chiba@astr.tohoku.ac.jp; jen@mso.anu.edu.au;
kcf@mso.anu.edu.au; lee@pa.msu.edu; jam@nofs.navy.mil;
re.fiorentin@oato.inaf.it; sivarani@iiap.res.in; rjwi222@uky.edu;
yanny@fnal.gov; don@oddjob.uchicago.edu
OI Re Fiorentin, Paola/0000-0002-4995-0475
FU Alfred P. Sloan Foundation; National Science Foundation; U.S. Department
of Energy; National Aeronautics and Space Administration; Japanese
Monbukagakusho; Max Planck Society; Higher Education Funding Council for
England; Physics Frontiers Center/Joint Institute for Nuclear
Astrophysics (JINA) [PHY 02-16783, PHY 08-22648]; U.S. National Science
Foundation; Ministry of Education, Culture, Sports, Science and
Technology in Japan [20340039]; Australian Research Council [DP0663562,
DP0984924]; NSF [AST 06-15991, AST 07-07901, AST 05-51161]; National
Research Foundation of Korea; ASI [I/058/10/0]
FX Funding for SDSS-I and SDSS-II has been provided by the Alfred P. Sloan
Foundation, the Participating Institutions, the National Science
Foundation, the U.S. Department of Energy, the National Aeronautics and
Space Administration, the Japanese Monbukagakusho, the Max Planck
Society, and the Higher Education Funding Council for England. The SDSS
Web site is http://www.sdss.org/.; T.C.B. and Y.S.L. acknowledge partial
support from grants PHY 02-16783 and PHY 08-22648: Physics Frontiers
Center/Joint Institute for Nuclear Astrophysics (JINA), awarded by the
U.S. National Science Foundation. M. C. acknowledges support from a
Grant-in-Aid for Scientific Research (20340039) of the Ministry of
Education, Culture, Sports, Science and Technology in Japan. Studies at
ANU of the most metal-poor populations of the Milky Way are supported by
Australian Research Council grants DP0663562 and DP0984924. Z.I.
acknowledges support from NSF grants AST 06-15991 and AST 07-07901, as
well as from grant AST 05-51161 to LSST for design and development
activities. D. A. acknowledges support provided by the National Research
Foundation of Korea to the Center for Galaxy Evolution Research. The
work of P. R. F. has been partially funded by ASI under contract to INAF
I/058/10/0 (Gaia Mission-The Italian Participation to DPAC).
NR 78
TC 73
Z9 73
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 FEB 10
PY 2012
VL 746
IS 1
AR 34
DI 10.1088/0004-637X/746/1/34
PG 23
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 926VZ
UT WOS:000302861300034
ER
PT J
AU Camilo, F
Kerr, M
Ray, PS
Ransom, SM
Johnston, S
Romani, RW
Parent, D
DeCesar, ME
Harding, AK
Donato, D
Parkinson, PMS
Ferrara, EC
Freire, PCC
Guillemot, L
Keith, M
Kramer, M
Wood, KS
AF Camilo, F.
Kerr, M.
Ray, P. S.
Ransom, S. M.
Johnston, S.
Romani, R. W.
Parent, D.
DeCesar, M. E.
Harding, A. K.
Donato, D.
Parkinson, P. M. Saz
Ferrara, E. C.
Freire, P. C. C.
Guillemot, L.
Keith, M.
Kramer, M.
Wood, K. S.
TI PSR J2030+3641: RADIO DISCOVERY AND GAMMA-RAY STUDY OF A MIDDLE-AGED
PULSAR IN THE NOW IDENTIFIED FERMI-LAT SOURCE 1FGL J2030.0+3641
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE gamma rays: stars; pulsars: individual (PSR J2030+3641)
ID LARGE-AREA TELESCOPE; BLIND FREQUENCY SEARCHES; MILLISECOND PULSARS;
MAGNETIC-FIELD; LIGHT CURVES; SLOT GAPS; EMISSION; POLARIZATION;
ACCELERATION; RADIATION
AB In a radio search with the Green Bank Telescope of three unidentified low Galactic latitude Fermi Large Area Telescope (LAT) sources, we have discovered the middle-aged pulsar J2030+3641 associated with 1FGL J2030.0+3641 (2FGL J2030.0+3640). Following the detection of gamma-ray pulsations using a radio ephemeris, we have obtained a phase-coherent timing solution based on gamma-ray and radio pulse arrival times which spans the entire Fermi mission. With a rotation period of 0.2 s, a spin-down luminosity of 3 x 10(34) erg s(-1), and a characteristic age of 0.5 Myr, PSR J2030+3641 is a middle-aged neutron star with spin parameters similar to those of the exceedingly gamma-ray-bright and radio-undetected Geminga. Its gamma-ray flux is 1% that of Geminga, primarily because of its much larger distance, as suggested by the large integrated column density of free electrons, DM = 246 pc cm(-3). We fit the gamma-ray light curve, along with limited radio polarimetric constraints, to four geometrical models of magnetospheric emission, and while none of the fits have high significance some are encouraging and suggest that further refinements of these models may be worthwhile. We argue that not many more non-millisecond radio pulsars may be detected along the Galactic plane that are responsible for LAT sources, but that modified methods to search for gamma-ray pulsations should be productive-PSR J2030+3641 would have been found blindly in gamma rays if only >= 0.8 GeV photons had been considered, owing to its relatively flat spectrum and location in a region of high soft background.
C1 [Camilo, F.] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA.
[Kerr, M.; Romani, R. W.] Stanford Univ, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA.
[Kerr, M.; Romani, R. W.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
[Ray, P. S.; Wood, K. S.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Ransom, S. M.] Natl Radio Astron Observ, Charlottesville, VA 22903 USA.
[Johnston, S.; Keith, M.] Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Epping, NSW 1710, Australia.
[Parent, D.] George Mason Univ, Ctr Earth Observing & Space Res, Coll Sci, Fairfax, VA 22030 USA.
[DeCesar, M. E.; Harding, A. K.; Donato, D.; Ferrara, E. C.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Donato, D.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[Donato, D.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Donato, D.] CRESST, Greenbelt, MD 20771 USA.
[Parkinson, P. M. Saz] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA.
[Parkinson, P. M. Saz] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Freire, P. C. C.; Guillemot, L.; Kramer, M.] Max Planck Inst Radioastron, D-53121 Bonn, Germany.
[Kramer, M.] Univ Manchester, Jodrell Bank, Ctr Astrophys, Sch Phys & Astron, Manchester M13 9PL, Lancs, England.
RP Camilo, F (reprint author), Columbia Univ, Columbia Astrophys Lab, 538 W 120th St, New York, NY 10027 USA.
EM fernando@astro.columbia.edu; kerrm@stanford.edu; Paul.Ray@nrl.navy.mil
RI Saz Parkinson, Pablo Miguel/I-7980-2013;
OI Ray, Paul/0000-0002-5297-5278; Ransom, Scott/0000-0001-5799-9714
FU NASA [PF0-110073, NAS8-03060]
FX The GBT is operated by the National Radio Astronomy Observatory, a
facility of the National Science Foundation operated under cooperative
agreement by Associated Universities, Inc. The Fermi-LAT Collaboration
acknowledges generous ongoing support from a number of agencies and
institutes that have supported both the development and the operation of
the LAT as well as scientific data analysis. These include the National
Aeronautics and Space Administration (NASA) and the Department of Energy
in the United States, the Commissariat a l'Energie Atomique and the
Centre National de la Recherche Scientifique/Institut National de
Physique Nucleaire et de Physique des Particules in France, the Agenzia
Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in
Italy, the Ministry of Education, Culture, Sports, Science and
Technology (MEXT), High Energy Accelerator Research Organization (KEK)
and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A.
Wallenberg Foundation, the Swedish Research Council, and the Swedish
National Space Board in Sweden. Support for this work was provided by
NASA through Einstein Postdoctoral Fellowship Award Number PF0-110073
issued by the Chandra X-ray Observatory Center, which is operated by the
Smithsonian Astrophysical Observatory for and on behalf of NASA under
contract NAS8-03060.
NR 54
TC 11
Z9 12
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 10
PY 2012
VL 746
IS 1
DI 10.1088/0004-637X/746/1/39
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 926VZ
UT WOS:000302861300039
ER
PT J
AU Luna, M
Karpen, JT
DeVore, CR
AF Luna, M.
Karpen, J. T.
DeVore, C. R.
TI FORMATION AND EVOLUTION OF A MULTI-THREADED SOLAR PROMINENCE
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: corona; Sun: filaments; prominences; Sun: magnetic topology
ID MAGNETIC-FIELD; CORONAL LOOPS; THERMAL NONEQUILIBRIUM; QUIESCENT
PROMINENCES; ALPHA FILTERGRAMS; ACTIVE-REGION; FILAMENT; DYNAMICS;
FLOWS; MODEL
AB We investigate the process of formation and subsequent evolution of prominence plasma in a filament channel and its overlying arcade. We construct a three-dimensional time-dependent model of an intermediate quiescent prominence suitable to be compared with observations. We combine the magnetic field structure of a three-dimensional sheared double arcade with one-dimensional independent simulations of many selected flux tubes, in which the thermal nonequilibrium process governs the plasma evolution. We have found that the condensations in the corona can be divided into two populations: threads and blobs. Threads are massive condensations that linger in the flux tube dips. Blobs are ubiquitous small condensations that are produced throughout the filament and overlying arcade magnetic structure, and rapidly fall to the chromosphere. The threads are the principal contributors to the total mass, whereas the blob contribution is small. The total prominence mass is in agreement with observations, assuming reasonable filling factors of order 0.001 and a fixed number of threads. The motion of the threads is basically horizontal, while blobs move in all directions along the field. We have generated synthetic images of the whole structure in an Ha proxy and in two EUV channels of the Atmospheric Imaging Assembly instrument on board Solar Dynamics Observatory, thus showing the plasma at cool, warm, and hot temperatures. The predicted differential emission measure of our system agrees very well with observations in the temperature range log T = 4.6-5.7. We conclude that the sheared-arcade magnetic structure and plasma behavior driven by thermal nonequilibrium fit the abundant observational evidence well for typical intermediate prominences.
C1 [Luna, M.] NASA, CRESST, GSFC, Greenbelt, MD 20771 USA.
[Luna, M.] NASA, Space Weather Lab, GSFC, Greenbelt, MD 20771 USA.
[DeVore, C. R.] USN, Res Lab, Washington, DC 20375 USA.
RP Luna, M (reprint author), NASA, CRESST, GSFC, Greenbelt, MD 20771 USA.
RI DeVore, C/A-6067-2015; Karpen, Judith/E-1484-2012
OI DeVore, C/0000-0002-4668-591X;
FU University of Maryland at College Park; people of CRESST; NASA through
NASA Center for Climate Simulation (NCCS) at Goddard Space Flight
Center; ISSI
FX This work has been supported by the NASA Heliophysics SR&T program. M.
L. also acknowledges support from the University of Maryland at College
Park and the people of CRESST. Resources supporting this work were
provided by the NASA High-End Computing (HEC) Program through the NASA
Center for Climate Simulation (NCCS) at Goddard Space Flight Center. All
of us are grateful to our colleagues on international teams on solar
prominences hosted by the International Space Science Institute (ISSI)
in Bern, Switzerland, especially team leader N. Labrosse, and
acknowledge the support of ISSI, where this work has been presented.
Finally, we thank J. A. Klimchuk, T. A. Kucera, S. R. Habbal, and K. K.
Reeves for helpful discussions.
NR 63
TC 39
Z9 39
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 FEB 10
PY 2012
VL 746
IS 1
DI 10.1088/0004-637X/746/1/30
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 926VZ
UT WOS:000302861300030
ER
PT J
AU Atwood, RE
Urban, JJ
AF Atwood, Rex E.
Urban, Joseph J.
TI Conformations of the Glycine Tripeptide Analog Ac-Gly-Gly-NHMe: A
Computational Study Including Aqueous Solvation Effects
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID MOLECULAR-FORCE FIELD; POLARIZABLE CONTINUUM MODEL; ACCURATE AB-INITIO;
ALANINE DIPEPTIDE; DENSITY FUNCTIONALS; PEPTIDE MODELS; GAS-PHASE;
DYNAMICS SIMULATIONS; CHARGE-DISTRIBUTION; ENERGY SURFACES
AB A computational study of the conformational preferences of the glycine tripeptide analog, Ac-Gly-Gly-NHMe, has been carried out. The molecule is considered in isolation as well as with a continuum model of aqueous solvation. In the absence of solvent, several low-energy conformers are found that exhibit turnlike structures including type I and type II beta turns. Upon consideration of aqueous solvation, two conformers, corresponding to the type I and II turn structures are found to be significantly lower in energy than all others. Results from ab initio molecular orbital theory calculations at MP2/aug-cc-pVTZ//MP2/6-311+G(d,p) are compared with those from density functional theory with B3LYP, omega B97X-D, B97-D, and M06-2X as well as several empirical force fields.
C1 [Atwood, Rex E.; Urban, Joseph J.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
RP Urban, JJ (reprint author), USN Acad, Dept Chem, 572 Holloway Rd, Annapolis, MD 21402 USA.
EM urban@usna.edu
FU Defense Threat Reduction Agency (DTRA); Naval Academy Research Office
through the Office of Naval Research (ONR)
FX Financial support for this work was provided from the Defense Threat
Reduction Agency (DTRA) and the Naval Academy Research Office through
the Office of Naval Research (ONR). A grant of computing time was also
received from the DoD High Performance Computing Modernization Program.
This support is gratefully acknowledged.
NR 62
TC 7
Z9 7
U1 1
U2 22
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD FEB 9
PY 2012
VL 116
IS 5
BP 1396
EP 1408
DI 10.1021/jp206152d
PG 13
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 888DX
UT WOS:000299985100010
PM 22214366
ER
PT J
AU Raphael, MP
Christodoulides, JA
Mulvaney, SP
Miller, MM
Long, JP
Byers, JM
AF Raphael, Marc P.
Christodoulides, Joseph A.
Mulvaney, Shawn P.
Miller, Michael M.
Long, James P.
Byers, Jeff M.
TI A New Methodology for Quantitative LSPR Biosensing and Imaging
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID SURFACE-PLASMON RESONANCE; SELF-ASSEMBLED MONOLAYERS; SILVER
NANOPARTICLES; GOLD; ARRAYS; SPECTROSCOPY; SENSITIVITY; MICROSCOPY;
SCATTERING; RESOLUTION
AB A new quantitative analysis methodology for localized surface plasmon resonance (LSPR) biosensing which determines surface-receptor fractional occupancy, as well as an LSPR imaging technique for the spatiotemporal mapping of binding events, is presented. Electron beam nanolithography was used to fabricate 20 X 20 arrays of gold nanostructures atop glass coverslips. A single biotinylated array was used to measure the association kinetics of neutravidin to the surface by spectroscopically determining the fractional occupancy as a function of time. By regenerating the same array, a reliable comparison of the kinetics could be made between control samples and neutravidin concentrations ranging from 1 mu M to SO nM. CCD-based imagery of the array, taken simultaneously with the spectroscopic measurements, reveals the binding of neutravidin to the surface as manifested by enhanced scattering over the majority of the resonance peak. The temporal resolution of the LSPR imaging technique was 200 ms and the spatial resolution was 8 mu m(2).
C1 [Raphael, Marc P.; Christodoulides, Joseph A.; Mulvaney, Shawn P.; Miller, Michael M.; Long, James P.; Byers, Jeff M.] USN, Res Lab, Washington, DC 20375 USA.
RP Raphael, MP (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 28
TC 14
Z9 14
U1 1
U2 31
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD FEB 7
PY 2012
VL 84
IS 3
BP 1367
EP 1373
DI 10.1021/ac2023266
PG 7
WC Chemistry, Analytical
SC Chemistry
GA 886OH
UT WOS:000299863200027
PM 22235804
ER
PT J
AU Vo, TT
Parrish, DA
Shreeve, JM
AF Vo, Thao T.
Parrish, Damon A.
Shreeve, Jean'ne M.
TI 1,1-Diamino-2,2-dintroethene (FOX-7) in Copper and Nickel Diamine
Complexes and Copper FOX-7
SO INORGANIC CHEMISTRY
LA English
DT Article
ID 1,1-DIAMINO-2,2-DINITROETHYLENE; SALTS
AB 1,1-Diamino-2,2-dinitroethene (FOX-7) reacts readily with copper nitrate in an aqueous solution of potassium hydroxide to form pea green Cu(FOX)(2)(H2O)(2) (5). FOX-7 complexes of copper and nickel supported by a variety of diamines including Cu(ea)(2)(FOX)(2)(H2O) (1), Cu(pn)(2)(FOX)(2) (2), Cu(bipy)(FOX)(2)(H2O)(4) (3a), Cu(bipy)(2)(FOX)(2)(H2O)(2.5) (3b), Cu(bipy)(FOX)(2)(DMSO)(2)center dot 2DMSO (3c), Cu(phen)(3)(FOX)(2)(H2O)(3) (4), (Ni)(2)(pben)(6)(FOX)(4)(NO3)(3)(H2O)(2) (6), and Ni(bipy)(3)(FOX)(2)(H2O)(4) (7a) were obtained via metathesis reactions with potassium-FOX (K-FOX). Surprisingly FOX-7, in the presence of Ni(II) and bipyridyl in a mixed solvent of methanol and dimethyl sulfoxide, gave a chelated FOX carbamate anion resulting in the compound Ni(bipy)2(FOX-CO2)center dot(DMSO) (7b). All metal salts were characterized by infrared, elemental analysis, and differential scanning calorimetry (DSC). Single-crystal X-ray diffraction structures were obtained for compounds 1, 2, 3c, 6, and 7b.
C1 [Vo, Thao T.; Shreeve, Jean'ne M.] Univ Idaho, Dept Chem, Moscow, ID 83844 USA.
[Parrish, Damon A.] USN, Res Lab, Washington, DC 20375 USA.
RP Shreeve, JM (reprint author), Univ Idaho, Dept Chem, Moscow, ID 83844 USA.
EM jshreeve@uidaho.edu
FU ONR [N00014-10-1-0097]
FX T.V. and J.M.S. gratefully acknowledge the support of the ONR
(N00014-10-1-0097). D.A.P. thanks ONR (N00014-11-AF-0-0002).
NR 18
TC 19
Z9 24
U1 1
U2 16
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
J9 INORG CHEM
JI Inorg. Chem.
PD FEB 6
PY 2012
VL 51
IS 3
BP 1963
EP 1968
DI 10.1021/ic202288t
PG 6
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 895CV
UT WOS:000300474700090
PM 22224456
ER
PT J
AU Chun, C
Lee, MY
Neta, B
Dzunic, J
AF Chun, Changbum
Lee, Mi Young
Neta, Beny
Dzunic, Jovana
TI On optimal fourth-order iterative methods free from second derivative
and their dynamics
SO APPLIED MATHEMATICS AND COMPUTATION
LA English
DT Article
DE Iterative methods; Order of convergence; Rational maps; Basin of
attraction; Julia sets; Conjugacy classes
ID SOLVING NONLINEAR EQUATIONS; ORDER
AB In this paper new fourth order optimal root-finding methods for solving nonlinear equations are proposed. The classical Jarratt's family of fourth-order methods are obtained as special cases. We then present results which describe the conjugacy classes and dynamics of the presented optimal method for complex polynomials of degree two and three. The basins of attraction of existing optimal methods and our method are presented and compared to illustrate their performance. Published by Elsevier Inc.
C1 [Neta, Beny] USN, Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
[Chun, Changbum; Lee, Mi Young] Sungkyunkwan Univ, Dept Math, Suwon 440746, South Korea.
[Dzunic, Jovana] Univ Nis, Dept Math, Fac Elect Engn, Nish 18000, Serbia.
RP Neta, B (reprint author), USN, Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
EM cbchun@skku.edu; sisley9678@naver.com; bneta@nps.edu;
jovana.dzunic@elfak.ni.ac.rs
OI Neta, Beny/0000-0002-7417-7496
FU National Research Foundation of Korea (NRF); Ministry of Education,
Science and Technology [2011-0025877]; Serbian Ministry of Education and
Science [174022]
FX This research was supported by Basic Science Research Program through
the National Research Foundation of Korea (NRF) funded by the Ministry
of Education, Science and Technology (2011-0025877). The fourth author
was partially supported by the Serbian Ministry of Education and Science
under grant 174022.
NR 21
TC 61
Z9 62
U1 1
U2 4
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0096-3003
J9 APPL MATH COMPUT
JI Appl. Math. Comput.
PD FEB 5
PY 2012
VL 218
IS 11
BP 6427
EP 6438
DI 10.1016/j.amc.2011.12.013
PG 12
WC Mathematics, Applied
SC Mathematics
GA 879EH
UT WOS:000299312000024
ER
PT J
AU Baker, DP
Pattison, J
AF Baker, Deane-Peter
Pattison, James
TI The Principled Case for Employing Private Military and Security
Companies in Interventions for Human Rights Purposes
SO JOURNAL OF APPLIED PHILOSOPHY
LA English
DT Article
ID HUMANITARIAN INTERVENTION
AB The possibility of using private military and security companies to bolster the capacity to undertake intervention for human rights purposes (humanitarian intervention and peacekeeping) has been increasingly debated. The focus of such discussions has, however, largely been on practical issues and the contingent problems posed by private force. By contrast, this article considers the principled case for privatising humanitarian intervention. It focuses on two central issues. First, does outsourcing humanitarian intervention to private military and security companies pose some fundamental, deeper problems in this context, such as an abdication of a state's duties? Second, on the other hand, is there a case for preferring these firms to other, state-based agents of humanitarian intervention? For instance, given a state's duties to their own military personnel, should the use of private military and security contractors be preferred to regular soldiers for humanitarian intervention?
C1 [Baker, Deane-Peter] USN Acad, Dept Leadership Eth & Law, Annapolis, MD 21402 USA.
[Pattison, James] Univ Manchester, Dept Polit, Manchester M13 9PL, Lancs, England.
RP Baker, DP (reprint author), USN Acad, Dept Leadership Eth & Law, Annapolis, MD 21402 USA.
EM dbaker@usna.edu; james.pattison@manchester.ac.uk
OI Pattison, James/0000-0002-4649-358X
NR 43
TC 3
Z9 3
U1 1
U2 18
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0264-3758
J9 J APPL PHILOS
JI J. Appl. Philos.
PD FEB
PY 2012
VL 29
IS 1
BP 1
EP 18
DI 10.1111/j.1468-5930.2011.00548.x
PG 18
WC Ethics; Philosophy
SC Social Sciences - Other Topics; Philosophy
GA 021HS
UT WOS:000309876500001
ER
PT J
AU Marques, TA
Thomas, L
Martin, SW
Mellinger, DK
Jarvis, S
Morrissey, RP
Ciminello, CA
DiMarzio, N
AF Marques, Tiago A.
Thomas, Len
Martin, Stephen W.
Mellinger, David K.
Jarvis, Susan
Morrissey, Ronald P.
Ciminello, Carroll-Anne
DiMarzio, Nancy
TI Spatially explicit capture-recapture methods to estimate minke whale
density from data collected at bottom-mounted hydrophones
SO JOURNAL OF ORNITHOLOGY
LA English
DT Article; Proceedings Paper
CT 9th EURING Analytical Meeting
CY SEP 14-20, 2009
CL Ist Superiore Protezione Ricerca Ambientale (ISPRA), Pescara, ITALY
SP EURING
HO Ist Superiore Protezione Ricerca Ambientale (ISPRA)
DE Minke whale; Passive acoustic monitoring; Proximity detector; Spatially
explicit capture recapture (SECR); OpenBUGS
ID HIERARCHICAL MODEL; DATA AUGMENTATION; CETACEANS; WATERS
AB Estimation of cetacean abundance or density using visual methods can be cost-ineffective under many scenarios. Methods based on acoustic data have recently been proposed as an alternative, and could potentially be more effective for visually elusive species that produce loud sounds. Motivated by a dataset of minke whale (Balaenoptera acutorostrata) "boing'' sounds detected at multiple hydrophones at the U.S. Navy's Pacific Missile Range Facility (PMRF), we present an approach to estimate density or abundance based on spatially explicit capture-recapture (SECR) methods. We implement the proposed methods in both a likelihood and a Bayesian framework. The point estimates for abundance and detection parameters from both implementation methods are very similar and agree well with current knowledge about the species. The two implementation approaches are compared in a small simulation study. While the Bayesian approach might be easier to generalize, the likelihood approach is faster to implement (at least in simple cases like the one presented here) and more readily amenable to model selection. SECR methods seem to be a strong candidate for estimating density from acoustic data where recaptures of sound at multiple acoustic sensors are available, and we anticipate further development of related methodologies.
C1 [Marques, Tiago A.; Thomas, Len] Univ St Andrews, Ctr Res Ecol & Environm Modelling, St Andrews KY16 9LZ, Fife, Scotland.
[Martin, Stephen W.] Space & Naval Warfare Syst Ctr Pacific, San Diego, CA 92152 USA.
[Mellinger, David K.] Oregon State Univ, Cooperat Inst Marine Resources Studies, Newport, OR 97365 USA.
[Jarvis, Susan; Morrissey, Ronald P.; Ciminello, Carroll-Anne; DiMarzio, Nancy] USN, Undersea Warfare Ctr Div, Newport, RI 02841 USA.
RP Thomas, L (reprint author), Univ St Andrews, Ctr Res Ecol & Environm Modelling, St Andrews KY16 9LZ, Fife, Scotland.
EM len@mcs.st-and.ac.uk
RI Marques, Tiago/A-5530-2010
OI Marques, Tiago/0000-0002-2581-1972
NR 20
TC 13
Z9 13
U1 1
U2 19
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0021-8375
J9 J ORNITHOL
JI J. Ornithol.
PD FEB
PY 2012
VL 152
SU 2
BP S445
EP S455
DI 10.1007/s10336-010-0535-7
PG 11
WC Ornithology
SC Zoology
GA 016RZ
UT WOS:000309538300015
ER
PT J
AU El-Mohammady, H
Shaheen, HI
Klena, JD
Nakhla, I
Weiner, MA
Armstrong, AW
AF El-Mohammady, Hanan
Shaheen, Hind I.
Klena, John D.
Nakhla, Isabelle
Weiner, Mattew A.
Armstrong, Adam W.
TI Specific IgA antibodies in the diagnosis of acute brucellosis
SO JOURNAL OF INFECTION IN DEVELOPING COUNTRIES
LA English
DT Article
DE brucellosis; IgA antibodies and early diagnostic marker
ID LINKED-IMMUNOSORBENT-ASSAY; OUTER-MEMBRANE PROTEINS; ACUTE FEBRILE
ILLNESS; MICE; ABORTUS; MELITENSIS; INFECTION; ANTIGENS; HUMANS; EGYPT
AB An Egyptian female with night sweats, headache, and back pain was diagnosed with acute brucellosis one week after returning from a North African country. Humoral immune responses to specific immunogenic proteins were investigated before and after treatment. ELISA was performed to detect levels of specific antibody (Ab) titers. Immunoblot analysis of Ab recognizing specific Brucella antigenic bands was also performed. IgA was detected on the day of disease onset. Specific agglutination titer was 1:160; it doubled three days later and treatment was implemented. Blood culture yielded Gram-negative coccobacilli after one month, confirmed as B. melitensis by AMOS-PCR. Immunoblotting revealed IgM Abs against two protein bands of 112 and 130-kDa observed only during the acute stage. On the other hand, the intensity of IgG Abs against 21 and 21.5-kDa protein bands positively correlated with the time of convalescence. Based on our observations we conclude that specific IgA levels may be used as an early diagnostic marker for Brucella and high molecular weight protein bands may be useful in the differentiation between acute and chronic brucellosis.
C1 [El-Mohammady, Hanan; Shaheen, Hind I.; Nakhla, Isabelle] US Naval Med Res Unit 3, Cairo, Egypt.
[Weiner, Mattew A.] US Naval Med Res Ctr, Biol Def Res Directorate, Silver Spring, MD USA.
[Armstrong, Adam W.] USN, Cent HIV Program, Natl Naval Med Ctr, Bethesda, MD 20084 USA.
RP El-Mohammady, H (reprint author), US Naval Med Res Unit 3, Cairo, Egypt.
EM hanan.elmohammady.eg@med.navy.mil
RI Valle, Ruben/A-7512-2013
FU [6000.000.000.E0501]
FX This work was supported by work unit # 6000.000.000.E0501
NR 29
TC 1
Z9 2
U1 0
U2 1
PU J INFECTION DEVELOPING COUNTRIES
PI TRAMANIGLIO
PA JIDC CENT OFF PORTO CONTE RICERCHE RES CTR, S P 55, PORTO CONTE CAPO
CACCIA KM 8.400 LOC, TRAMANIGLIO, 07041, ITALY
SN 1972-2680
J9 J INFECT DEV COUNTR
JI J. Infect. Dev. Ctries.
PD FEB
PY 2012
VL 6
IS 2
BP 192
EP 200
PG 9
WC Infectious Diseases
SC Infectious Diseases
GA 967LC
UT WOS:000305908300015
PM 22337851
ER
PT J
AU Kim, J
Furukawa, Y
Curry, KJ
Bennett, RH
AF Kim, Jinwook
Furukawa, Yoko
Curry, Kenneth J.
Bennett, Richard H.
TI ROLE OF CHITIN IN MONTMORILLONITE FABRIC: TRANSMISSION ELECTRON
MICROSCOPE OBSERVATIONS
SO CLAYS AND CLAY MINERALS
LA English
DT Article
DE Chitin; Fabric; Flocculation; Hydrodynamic Diameter; Montmorillonite;
Transmission Electron Microscopy
ID MICROBIAL FE(III) REDUCTION; DYNAMIC LIGHT-SCATTERING; ORGANIC-MATTER;
FLOC SIZE; CLAY; MARINE; SEDIMENTS; MINERALIZATION; PERMEABILITY;
AGGREGATION
AB Particle concentration, charge, solution chemistry (i.e. ionic strength), and the nature of organic matter (OM) are the major factors controlling particle flocculation in aqueous environments. In the present study, the nature of clay fabric associated with clay OM interaction at a range of ionic strengths was the focus. In the flocculation experiments, the aqueous suspension of montmorillonite and chitin was mixed with NaCl/MgSO4 electrolyte solution. Advanced sample-preparation techniques and visualization methods using transmission electron microscopy were used to observe directly the micro- and nano-scale clay-OM fabric of the resulting flocs. Such direct observation elucidated the role of OM in clay flocculation; few attempts have been made in the past due to the technical difficulties in preserving the original structure. A comparison of clay fabric at two different ionic strengths of 0 and 0.14 M revealed that the individual hexagonal clay particles settled slowly with little intra-aggregate void space (void ratio: 0.07) at 0 M while rapid flocculation and settling of clay particles at 0.14 M, with or without OM, resulted in a more open fabric with greater void space (void ratio: 0.33). The silver-staining technique demonstrated effectively the location of electron-transparent chitin in montmorillonite aggregates. Chitin appeared to link the face-to-face (EF) contacts of clay domains by bridging between negatively charged face surfaces. However, the resultant void ratio and the average hydrodynamic diameter (d(H)) values were lower than in the OM-free system after flocculation. The results indicated that the interplay between ionic strength and OM content affected the floc architecture and void ratio.
C1 [Kim, Jinwook] Yonsei Univ, Dept Earth Syst Sci, Seoul 120749, South Korea.
[Furukawa, Yoko] USN, Res Lab, Seafloor Sci Branch, Stennis Space Ctr, MS 39529 USA.
[Curry, Kenneth J.] Univ So Mississippi, Dept Biol Sci, Hattiesburg, MS 39406 USA.
[Bennett, Richard H.] SEAPROBE Inc, Picayune, MS 39466 USA.
RP Kim, J (reprint author), Yonsei Univ, Dept Earth Syst Sci, Seoul 120749, South Korea.
EM jinwook@yonsei.ac.kr
RI Furukawa, Yoko/B-3099-2013
FU National Research Foundation of Korea (NRF); Ministry of Education,
Science, and Technology [20110013407]; ONR/NRL [0601153N]; National
Science Foundation [OCE-0824566, OCE-0930685, OCE-0824569, OCE-0930879]
FX The research described here was supported by the Basic Science Research
Program through the National Research Foundation of Korea (NRF) funded
by the Ministry of Education, Science, and Technology (20110013407) to
Jinwook Kim, ONR/NRL Core 6.1 funding (PE#0601153N) to Yoko Furukawa,
and was partially supported by grants from the National Science
Foundation to R. Bennett (OCE-0824566 and OCE-0930685) and K. Curry
(OCE-0824569 and OCE-0930879).
NR 50
TC 2
Z9 2
U1 3
U2 16
PU CLAY MINERALS SOC
PI CHANTILLY
PA 3635 CONCORDE PKWY, STE 500, CHANTILLY, VA 20151-1125 USA
SN 0009-8604
J9 CLAY CLAY MINER
JI Clay Clay Min.
PD FEB
PY 2012
VL 60
IS 1
BP 89
EP 98
DI 10.1346/CCMN.2012.0600108
PG 10
WC Chemistry, Physical; Geosciences, Multidisciplinary; Mineralogy; Soil
Science
SC Chemistry; Geology; Mineralogy; Agriculture
GA 930MW
UT WOS:000303144500008
ER
PT J
AU Blaylock, JM
Byers, DK
Gibbs, BT
Nayak, G
Ferguson, M
Tribble, DR
Porter, C
Decker, CF
AF Blaylock, J. M.
Byers, D. K.
Gibbs, B. T.
Nayak, G.
Ferguson, M.
Tribble, D. R.
Porter, C.
Decker, C. F.
TI Longitudinal assessment of cardiac diastolic function in HIV-infected
patients
SO INTERNATIONAL JOURNAL OF STD & AIDS
LA English
DT Article
DE HIV infection; cardiac; cardiovascular disease; diastolic dysfunction;
echocardiography
ID RECEIVING ANTIRETROVIRAL THERAPY; ENDOTHELIAL ACTIVATION MARKERS;
MYOCARDIAL-INFARCTION; COLLABORATIVE ANALYSIS; HEART-FAILURE;
CARDIOVASCULAR-DISEASE; CLINICAL-TRIALS; RISK-FACTORS; DYSFUNCTION;
PREVALENCE
AB Asymptomatic isolated diastolic dysfunction (DD), with normal left ventricular systolic function, may be the first indication of underlying cardiac disease in HIV-negative populations. We previously reported a high prevalence (37%) of DD among asymptomatic HIV-infected patients at low risk for AIDS and cardiovascular disease (CVD). We performed a longitudinal assessment of interval echocardiographic changes in this cohort over a four-year period. Repeat transthoracic echocardiograms (TTEs) utilized standard techniques. Sixty (of the original 91) HIV-infected patients, predominately men, underwent repeat TTE (median follow-up 3.7 years, interquartile range [IQR] 3.5, 4.0). Cohort characteristics (median; IQR) include age 42.0 (36.5, 46.0) years, HIV duration 16.4 years (8.1, 18.9), current CD4 count 572.0 cells/mm(3) (436.5, 839.0), antiretroviral therapy (ART) duration 8.1 years,(4.8, 13.4) and Framingham risk score 1.0 (0.0, 2.0). DD was observed in 28/60 patients on re-evaluation (47%, 95% confidence interval [CI] 34%, 60%); 31% (11/36) of patients had new onset DD for an overall incidence of 8.2/100 person-years. On follow-up, subjects with DD were older, had a trend towards higher body mass index, hypertension and longer duration of HIV infection compared with subjects: without DD. We confirmed a high prevalence of DD (47%) in asymptomatic HIV-infected patients at low risk for AIDS and CVD.
C1 [Decker, C. F.] Natl Naval Med Ctr, Div Infect Dis, Bethesda, MD 20889 USA.
[Blaylock, J. M.; Gibbs, B. T.] Walter Reed Army Med Ctr, Washington, DC 20307 USA.
[Tribble, D. R.] Infect Dis Clin Res Program, Bethesda, MD USA.
[Tribble, D. R.; Decker, C. F.] Uniformed Serv Univ Hlth Sci, Bethesda, MD USA.
[Porter, C.] USN, Med Res Ctr, Silver Spring, MD USA.
RP Decker, CF (reprint author), Natl Naval Med Ctr, Div Infect Dis, 8901 Wisconsin Ave, Bethesda, MD 20889 USA.
EM Catherine.Decker@med.navy.mil
NR 42
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U1 0
U2 1
PU ROYAL SOC MEDICINE PRESS LTD
PI LONDON
PA 1 WIMPOLE STREET, LONDON W1G 0AE, ENGLAND
SN 0956-4624
J9 INT J STD AIDS
JI Int. J. STD AIDS
PD FEB
PY 2012
VL 23
IS 2
BP 105
EP 110
DI 10.1258/ijsa.2011.011099
PG 6
WC Immunology; Infectious Diseases
SC Immunology; Infectious Diseases
GA 929WK
UT WOS:000303096200006
PM 22422684
ER
PT J
AU Bernhardt, PA
Fernsler, RF
AF Bernhardt, Paul A.
Fernsler, Richard F.
TI Electric Field Amplification inside a Porous Spherical Cavity Resonator
Excited by an External Plane Wave
SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
LA English
DT Article
DE Externally excited spherical resonant cavity; gas breakdown; large
electric fields
AB A spherical polyhedron constructed from open surface polygons is an electromagnetic wave resonator that can be excited by an external plane wave. The resonant frequencies of the porous sphere depend on the radius of the sphere and the area of the openings in the surface of the sphere. The strength of the internal electric fields varies with the width of the conducting edges that comprise the polyhedron frame. At the optimum edge width, the external EM wave field excites the strongest internal field amplitudes. The WIPL-D EM simulation model is used to determine the optimum porous resonator for polyhedrons with 180 and 960 vertices. All of the cavity modes for a solid spherical cavity resonator can be excited in the porous spherical cavity resonator (PSCR). With a high resonator Q, an EM plane-wave of 1 V/m can excite an internal electric field of over 1000 V/m that takes finite time for fields to build up. The spherical cavity modes provide a variety of electric field distributions at the interior of the PSCR. The PSCR may be used to greatly increase the electric fields of a high power radio beam in order to produce isolated plasma clouds by neutral gas breakdown.
C1 [Bernhardt, Paul A.; Fernsler, Richard F.] USN, Div Plasma Phys, Res Lab, Washington, DC 20375 USA.
RP Bernhardt, PA (reprint author), USN, Div Plasma Phys, Res Lab, Washington, DC 20375 USA.
EM paul.bernhardt@nrl.navy.mil
FU Office of Naval Research
FX Manuscript received January 01, 2011; revised June 15, 2011; accepted
July 21, 2011. Date of publication October 21, 2011; date of current
version February 03, 2012. This work was supported by the Office of
Naval Research.
NR 8
TC 1
Z9 1
U1 2
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-926X
J9 IEEE T ANTENN PROPAG
JI IEEE Trans. Antennas Propag.
PD FEB
PY 2012
VL 60
IS 2
BP 832
EP 839
DI 10.1109/TAP.2011.2173132
PN 2
PG 8
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 924VV
UT WOS:000302720300013
ER
PT J
AU Ajello, M
Baldini, L
Barbiellini, G
Bastieri, D
Bechtol, K
Bellazzini, R
Berenji, B
Bloom, ED
Bonamente, E
Borgland, AW
Bregeon, J
Brigida, M
Bruel, P
Buehler, R
Buson, S
Caliandro, GA
Cameron, RA
Caraveo, PA
Casandjian, JM
Cecchi, C
Charles, E
Chekhtman, A
Chiang, J
Ciprini, S
Claus, R
Cohen-Tanugi, J
Conrad, J
Cutini, S
de Angelis, A
de Palma, F
Dermer, CD
Silva, EDE
Drell, PS
Drlica-Wagner, A
Enoto, T
Favuzzi, C
Fegan, SJ
Ferrara, EC
Fukazawa, Y
Fusco, P
Gargano, F
Gasparrini, D
Germani, S
Giglietto, N
Giordano, F
Giroletti, M
Glanzman, T
Godfrey, G
Graham, P
Grenier, IA
Guiriec, S
Gustafsson, M
Hadasch, D
Hayashida, M
Hughes, RE
Johnson, AS
Kamae, T
Katagiri, H
Kataoka, J
Knodlseder, J
Kuss, M
Lande, J
Latronico, L
Lionetto, AM
Longo, F
Loparco, F
Lovellette, MN
Lubrano, P
Mazziotta, MN
Michelson, PF
Mitthumsiri, W
Mizuno, T
Monte, C
Monzani, ME
Morselli, A
Moskalenko, IV
Murgia, S
Norris, JP
Nuss, E
Ohsugi, T
Okumura, A
Orlando, E
Ormes, JF
Ozaki, M
Paneque, D
Pesce-Rollins, M
Pierbattista, M
Piron, F
Pivato, G
Raino, S
Razzano, M
Ritz, S
Roth, M
Parkinson, PMS
Scargle, JD
Schalk, TL
Sgro, C
Siskind, EJ
Spandre, G
Spinelli, P
Suson, DJ
Tajima, H
Takahashi, H
Tanaka, T
Thayer, JG
Thayer, JB
Tibaldo, L
Tinivella, M
Torres, DF
Troja, E
Uchiyama, Y
Usher, TL
Vandenbroucke, J
Vasileiou, V
Vianello, G
Vitale, V
Waite, AP
Winer, BL
Wood, KS
Wood, M
Yang, Z
Zimmer, S
AF Ajello, M.
Baldini, L.
Barbiellini, G.
Bastieri, D.
Bechtol, K.
Bellazzini, R.
Berenji, B.
Bloom, E. D.
Bonamente, E.
Borgland, A. W.
Bregeon, J.
Brigida, M.
Bruel, P.
Buehler, R.
Buson, S.
Caliandro, G. A.
Cameron, R. A.
Caraveo, P. A.
Casandjian, J. M.
Cecchi, C.
Charles, E.
Chekhtman, A.
Chiang, J.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
Conrad, J.
Cutini, S.
de Angelis, A.
de Palma, F.
Dermer, C. D.
do Couto e Silva, E.
Drell, P. S.
Drlica-Wagner, A.
Enoto, T.
Favuzzi, C.
Fegan, S. J.
Ferrara, E. C.
Fukazawa, Y.
Fusco, P.
Gargano, F.
Gasparrini, D.
Germani, S.
Giglietto, N.
Giordano, F.
Giroletti, M.
Glanzman, T.
Godfrey, G.
Graham, P.
Grenier, I. A.
Guiriec, S.
Gustafsson, M.
Hadasch, D.
Hayashida, M.
Hughes, R. E.
Johnson, A. S.
Kamae, T.
Katagiri, H.
Kataoka, J.
Knoedlseder, J.
Kuss, M.
Lande, J.
Latronico, L.
Lionetto, A. M.
Longo, F.
Loparco, F.
Lovellette, M. N.
Lubrano, P.
Mazziotta, M. N.
Michelson, P. F.
Mitthumsiri, W.
Mizuno, T.
Monte, C.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Murgia, S.
Norris, J. P.
Nuss, E.
Ohsugi, T.
Okumura, A.
Orlando, E.
Ormes, J. F.
Ozaki, M.
Paneque, D.
Pesce-Rollins, M.
Pierbattista, M.
Piron, F.
Pivato, G.
Raino, S.
Razzano, M.
Ritz, S.
Roth, M.
Parkinson, P. M. Saz
Scargle, J. D.
Schalk, T. L.
Sgro, C.
Siskind, E. J.
Spandre, G.
Spinelli, P.
Suson, D. J.
Tajima, H.
Takahashi, H.
Tanaka, T.
Thayer, J. G.
Thayer, J. B.
Tibaldo, L.
Tinivella, M.
Torres, D. F.
Troja, E.
Uchiyama, Y.
Usher, T. L.
Vandenbroucke, J.
Vasileiou, V.
Vianello, G.
Vitale, V.
Waite, A. P.
Winer, B. L.
Wood, K. S.
Wood, M.
Yang, Z.
Zimmer, S.
TI Limits on large extra dimensions based on observations of neutron stars
with the Fermi-LAT
SO JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
LA English
DT Article
DE extra dimensions; gravity; neutron stars; core-collapse supernovas
ID LARGE-AREA TELESCOPE; EGRET; CATALOG
AB We present limits for the compactification scale in the theory of Large Extra Dimensions (LED) proposed by Arkani-Hamed, Dimopoulos, and Dvali. We use 11 months of data from the Fermi Large Area Telescope (Fermi-LAT) to set gamma ray flux limits for 6 gamma-ray faint neutron stars (NS). To set limits on LED we use the model of Hannestad and Raffelt (HR) that calculates the Kaluza-Klein (KK) graviton production in supernova cores and the large fraction subsequently gravitationally bound around the resulting NS. The predicted decay of the bound KK gravitons to gamma gamma should contribute to the flux from NSs. Considering 2 to 7 extra dimensions of the same size in the context of the HR model, we use Monte Carlo techniques to calculate the expected differential flux of gamma-rays arising from these KK gravitons, including the effects of the age of the NS, graviton orbit, and absorption of gamma-rays in the magnetosphere of the NS. We compare our Monte Carlo-based differential flux to the experimental differential flux using maximum likelihood techniques to obtain our limits on LED. Our limits are more restrictive than past EGRET-based optimistic limits that do not include these important corrections. Additionally, our limits are more stringent than LHC based limits for 3 or fewer LED, and comparable for 4 LED. We conclude that if the effective Planck scale is around a TeV, then for 2 or 3 LED the compactification topology must be more complicated than a torus.
C1 [Ajello, M.; Bechtol, K.; Berenji, B.; Bloom, E. D.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Enoto, T.; Glanzman, T.; Godfrey, G.; Graham, P.; Hayashida, M.; Hughes, R. E.; Kamae, T.; Lande, J.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Okumura, A.; Orlando, E.; Paneque, D.; Tajima, H.; Tanaka, T.; Thayer, J. G.; Thayer, J. B.; Uchiyama, Y.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wood, M.] Stanford Univ, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA.
[Ajello, M.; Bechtol, K.; Berenji, B.; Bloom, E. D.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Enoto, T.; Glanzman, T.; Godfrey, G.; Graham, P.; Hayashida, M.; Hughes, R. E.; Kamae, T.; Lande, J.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Okumura, A.; Orlando, E.; Paneque, D.; Tajima, H.; Tanaka, T.; Thayer, J. G.; Thayer, J. B.; Uchiyama, Y.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wood, M.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
[Baldini, L.; Bellazzini, R.; Bregeon, J.; Kuss, M.; Pesce-Rollins, M.; Razzano, M.; Sgro, C.; Spandre, G.; Tinivella, M.] INFN Sez Pisa, I-56127 Pisa, Italy.
[Barbiellini, G.; Longo, F.] INFN Sez Trieste, I-34127 Trieste, Italy.
[Barbiellini, G.; Longo, F.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
[Bastieri, D.; Buson, S.; Gustafsson, M.; Tibaldo, L.] INFN Sez Padova, I-35131 Padua, Italy.
[Bastieri, D.; Buson, S.; Pivato, G.; Tibaldo, L.] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
[Bonamente, E.; Cecchi, C.; Germani, S.; Lubrano, P.] INFN Sez Perugia, I-06123 Perugia, Italy.
[Bonamente, E.; Cecchi, C.; Ciprini, S.; Germani, S.; Lubrano, P.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Univ Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Politecn Bari, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Gargano, F.; Giglietto, N.; Giordano, F.; Loparco, F.; Mazziotta, M. N.; Monte, C.; Spinelli, P.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Bruel, P.; Fegan, S. J.] Ecole Polytech, Lab Leprince Ringuet, CNRS IN2P3, Palaiseau, France.
[Caliandro, G. A.; Hadasch, D.; Torres, D. F.] Inst Ciencies Espai IEEE CSIC, Barcelona 08193, Spain.
[Caraveo, P. A.] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy.
[Casandjian, J. M.; Grenier, I. A.; Pierbattista, M.] CEA IRFU CNRS Univ Paris Diderot, Lab AIM, Serv Astrophys, CEA Saclay, F-91191 Gif Sur Yvette, France.
[Chekhtman, A.] Artep Inc, Ellicott City, MD 21042 USA.
[Ciprini, S.] ASI Sci Data Ctr, I-00044 Rome, Italy.
[Cohen-Tanugi, J.; Nuss, E.; Piron, F.; Vasileiou, V.] Univ Montpellier 2, Lab Univers & Particules Montpellier, CNRS IN2P3, F-34095 Montpellier 05, France.
[Conrad, J.] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden.
[Conrad, J.; Yang, Z.; Zimmer, S.] Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.
[Conrad, J.] Royal Swedish Acad Sci Res, Stockholm, Sweden.
[Cutini, S.; Gasparrini, D.] Agenzia Spaziale Italiana ASI Sci Data Ctr, I-00044 Rome, Italy.
[de Angelis, A.] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy.
[de Angelis, A.] Grp Collegato Udine, INFN Sez Trieste, I-33100 Udine, Italy.
[Dermer, C. D.; Lovellette, M. N.; Wood, K. S.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Ferrara, E. C.; Troja, E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Fukazawa, Y.; Mizuno, T.] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan.
[Giroletti, M.] INAF Ist Radioastron, I-40129 Bologna, Italy.
[Guiriec, S.] Univ Alabama, Ctr Space Plasma & Aeron Res CSPAR, Huntsville, AL 35899 USA.
[Hughes, R. E.] Kyoto Univ, Dept Astron, Grad Sch Sci, Sakyo Ku, Kyoto 6068502, Japan.
[Johnson, A. S.; Winer, B. L.] Ohio State Univ, Dept Phys, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA.
[Katagiri, H.] Ibaraki Univ, Coll Sci, Bunkyo Ku, Mito, Ibaraki 3108512, Japan.
[Kataoka, J.] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan.
[Knoedlseder, J.] IRAP, CNRS, F-31028 Toulouse 4, France.
[Knoedlseder, J.] Univ Toulouse, GAHEC, UPS OMP, IRAP, Toulouse, France.
[Latronico, L.] INFN Sezioine Torino, I-10125 Turin, Italy.
[Lionetto, A. M.; Morselli, A.; Vitale, V.] INFN Sez Roma Tor Vergata, I-00133 Rome, Italy.
[Lionetto, A. M.; Vitale, V.] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
[Norris, J. P.] Boise State Univ, Dept Phys, Boise, ID 83725 USA.
[Ohsugi, T.; Takahashi, H.] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan.
[Okumura, A.; Ozaki, M.] JAXA, Inst Space & Astronaut Sci, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan.
[Orlando, E.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Ormes, J. F.] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA.
[Paneque, D.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Razzano, M.; Ritz, S.; Parkinson, P. M. Saz; Schalk, T. L.] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA.
[Razzano, M.; Ritz, S.; Parkinson, P. M. Saz; Schalk, T. L.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Siskind, E. J.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Scargle, J. D.] NASA, Ames Res Ctr, Div Space Sci, Moffett Field, CA 94035 USA.
[Siskind, E. J.] NYCB Real Time Comp Inc, Lattingtown, NY 11560 USA.
[Suson, D. J.] Purdue Univ Calumet, Dept Chem & Phys, Hammond, IN 46323 USA.
[Tajima, H.] Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan.
[Troja, E.] NASA Postdoctoral Program, Oak Ridge, TN USA.
[Vianello, G.] Consorzio Interuniv Fis Spaziale CIFS, I-10133 Turin, Italy.
[Torres, D. F.] Inst Catalana Recerca & Estudis Avancats ICREA, Barcelona, Spain.
RP Ajello, M (reprint author), Stanford Univ, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA.
EM bijanb@alumni.stanford.edu; bberenji@uci.edu;
johann.cohen-tanugi@lupm.in2p3.fr
RI Orlando, E/R-5594-2016; Do, Changwoo/A-9670-2011; Baldini,
Luca/E-5396-2012; lubrano, pasquale/F-7269-2012; Morselli,
Aldo/G-6769-2011; Kuss, Michael/H-8959-2012; giglietto,
nicola/I-8951-2012; Ozaki, Masanobu/K-1165-2013; Loparco,
Francesco/O-8847-2015; Gargano, Fabio/O-8934-2015; Moskalenko,
Igor/A-1301-2007; Mazziotta, Mario /O-8867-2015; Sgro,
Carmelo/K-3395-2016; Torres, Diego/O-9422-2016;
OI Do, Changwoo/0000-0001-8358-8417; lubrano, pasquale/0000-0003-0221-4806;
Morselli, Aldo/0000-0002-7704-9553; giglietto,
nicola/0000-0002-9021-2888; Loparco, Francesco/0000-0002-1173-5673;
Gargano, Fabio/0000-0002-5055-6395; Moskalenko,
Igor/0000-0001-6141-458X; Mazziotta, Mario /0000-0001-9325-4672; Torres,
Diego/0000-0002-1522-9065; Gasparrini, Dario/0000-0002-5064-9495;
Baldini, Luca/0000-0002-9785-7726; Graham, Peter/0000-0002-1600-1601; De
Angelis, Alessandro/0000-0002-3288-2517; Caraveo,
Patrizia/0000-0003-2478-8018; Sgro', Carmelo/0000-0001-5676-6214;
SPINELLI, Paolo/0000-0001-6688-8864; Bastieri,
Denis/0000-0002-6954-8862; Pesce-Rollins, Melissa/0000-0003-1790-8018;
Giroletti, Marcello/0000-0002-8657-8852; Cutini,
Sara/0000-0002-1271-2924; Berenji, Bijan/0000-0002-4551-772X
FU National Aeronautics and Space Administration; Department of Energy in
the United States; Commissariat a l'Energie Atomique; Centre National de
la Recherche Scientifique / Institut National de Physique Nucleaire et
de Physique des Particules in France; Agenzia Spaziale Italiana;
Istituto Nazionale di Fisica Nucleare in Italy; Ministry of Education,
Culture, Sports, Science and Technology (MEXT), High Energy Accelerator
Research Organization (KEK); Japan Aerospace Exploration Agency (JAXA)
in Japan; K. A. Wallenberg Foundation; Swedish Research Council; Swedish
National Space Board in Sweden; Istituto Nazionale di Astrofisica in
Italy; Centre National d'Etudes Spatiales in France
FX The Fermi-LAT Collaboration acknowledges generous ongoing support from a
number of agencies and institutes that have supported both the
development and the operation of the LAT as well as scientific data
analysis. These include the National Aeronautics and Space
Administration and the Department of Energy in the United States, the
Commissariat a l'Energie Atomique and the Centre National de la
Recherche Scientifique / Institut National de Physique Nucleaire et de
Physique des Particules in France, the Agenzia Spaziale Italiana and the
Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of
Education, Culture, Sports, Science and Technology (MEXT), High Energy
Accelerator Research Organization (KEK) and Japan Aerospace Exploration
Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish
Research Council and the Swedish National Space Board in Sweden.;
Additional support for science analysis during the operations phase is
gratefully acknowledged from the Istituto Nazionale di Astrofisica in
Italy and the Centre National d'Etudes Spatiales in France.
NR 28
TC 2
Z9 2
U1 0
U2 7
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 FEB
PY 2012
IS 2
AR 012
DI 10.1088/1475-7516/2012/02/012
PG 25
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 904EE
UT WOS:000301176000013
ER
PT J
AU Gilbreath, GC
AF Gilbreath, G. Charmaine
TI From Wheatstone to Cameron and beyond: overview in 3-D and 4-D imaging
technology
SO OPTICAL ENGINEERING
LA English
DT Article
DE realtime interactive 3-D imaging; 3-D and 4-D imaging; realtime
holography; telesurgery; stereoscopy; multi-view stereoscopy
AB This paper reviews three-dimensional (3-D) and four-dimensional (4-D) imaging technology, from Wheatstone through today, with some prognostications for near future applications. This field is rich in variety, subject specialty, and applications. A major trend, multi-view stereoscopy, is moving the field forward to real-time wide-angle 3-D reconstruction as breakthroughs in parallel processing and multiprocessor computers enable very fast processing. Real-time holography meets 4-D imaging reconstruction at the goal of achieving real-time, interactive, 3-D imaging. Applications to telesurgery and telemedicine as well as to the needs of the defense and intelligence communities are also discussed. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.OE.51.2.021102]
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Gilbreath, GC (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM Charmaine.gilbreath@nrl.navy.mil
NR 20
TC 0
Z9 0
U1 0
U2 6
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD FEB
PY 2012
VL 51
IS 2
AR 021102
DI 10.1117/1.OE.51.2.021102
PG 6
WC Optics
SC Optics
GA 925RS
UT WOS:000302779500004
ER
PT J
AU Gilbreath, GC
Lipton, L
AF Gilbreath, G. Charmaine
Lipton, Lenny
TI 3-D and 4-D Imaging Techniques and Applications
SO OPTICAL ENGINEERING
LA English
DT Editorial Material
C1 [Gilbreath, G. Charmaine] USN, Res Lab, Washington, DC 20375 USA.
RP Gilbreath, GC (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM charmaine.gilbreath@nrl.navy.mil; Lipton3D@gmail.com
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
J9 OPT ENG
JI Opt. Eng.
PD FEB
PY 2012
VL 51
IS 2
AR 021101
DI 10.1117/1.OE.51.2.021101
PG 1
WC Optics
SC Optics
GA 925RS
UT WOS:000302779500003
ER
PT J
AU Pelizzo, MG
Fineschi, S
Corso, AJ
Zuppella, P
Nicolosi, P
Seely, J
Kjornrattanawanich, B
Windt, DL
AF Pelizzo, Maria Guglielmina
Fineschi, Silvano
Corso, Alain Jody
Zuppella, Paola
Nicolosi, Piergiorgio
Seely, John
Kjornrattanawanich, Benjawan
Windt, David L.
TI Long-term stability of Mg/SiC multilayers
SO OPTICAL ENGINEERING
LA English
DT Article
DE extreme ultraviolet; multilayer; space instruments; space applications;
SiC/Mg; aging
ID EXTREME-ULTRAVIOLET LITHOGRAPHY; LIGHT CORONAGRAPHIC IMAGER; NM
WAVELENGTH; REFLECTIVITY; PERFORMANCE
AB Mg/SiC multilayers have been selected to coat the primary and secondary mirrors of the SCORE (Sounding-rocket CORonagraphic Experiment) telescope, a part of the NASA HERSCHEL program. Their experimental reflectance at the He II 30.4 nm wavelength is twice as much that of standard Mo/Si multilayer coatings, with a large improvement of the instrument effective area. Nevertheless, their long-term stability still needs to be evaluated in order to consider them as a valuable candidate for instrumentation of a long term space mission. A study is carried out on different Mg/SiC samples designed and fabricated varying the structural parameters and/or the capping layer material and thickness, which have been monitored for four years after deposition. (c) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.OE.51.2.023801]
C1 [Pelizzo, Maria Guglielmina; Corso, Alain Jody; Zuppella, Paola; Nicolosi, Piergiorgio] CNR, Inst Photon & Nanotechnol, LUXOR Lab, I-35131 Padua, Italy.
[Pelizzo, Maria Guglielmina; Corso, Alain Jody; Zuppella, Paola; Nicolosi, Piergiorgio] Univ Padua, Dept Informat Engn, I-35131 Padua, Italy.
[Fineschi, Silvano] INAF, Osservatorio Astron Torino, I-10025 Pino Torinese, TO, Italy.
[Seely, John] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Kjornrattanawanich, Benjawan] Brookhaven Natl Lab, USRA, Upton, NY 11973 USA.
[Kjornrattanawanich, Benjawan] Brookhaven Natl Lab, NSLS, Upton, NY 11973 USA.
[Windt, David L.] Reflect Xray Opt LLC, New York, NY 10027 USA.
RP Pelizzo, MG (reprint author), CNR, Inst Photon & Nanotechnol, LUXOR Lab, Via Trasea 7, I-35131 Padua, Italy.
EM pelizzo@dei.unipd.it
FU Italian Space Agency [ASI/INAF/015/07/0, ASI/ INAF/Solar Orbiter]; CAssa
di RIsparmio di PAdova e ROvigo (CARIPARO) Foundation-Bandi di
Eccellenza
FX The authors thank Prof. Ester Antonucci, INAF-OATO, Principal
Investigator of METIS (Solar Orbiter) and SCORE, and Dr. A. Giglia for
measurement at BEAR beamline. This work has been performed with the
financial support of the Italian Space Agency (ASI/INAF/015/07/0 and
ASI/ INAF/Solar Orbiter) and of the CAssa di RIsparmio di PAdova e
ROvigo (CARIPARO) Foundation-Bandi di Eccellenza 2009/2010. The author
thanks EU COST Action MP0601 "Short wavelength laboratory sources".
NR 22
TC 15
Z9 16
U1 0
U2 8
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD FEB
PY 2012
VL 51
IS 2
AR 023801
DI 10.1117/1.OE.51.2.023801
PG 9
WC Optics
SC Optics
GA 925RS
UT WOS:000302779500028
ER
PT J
AU Ferrer, G
Cortezia, S
Neumann, JM
AF Ferrer, Geraldo
Cortezia, Sandro
Neumann, Jaqueline Morbach
TI Green City
SO JOURNAL OF INDUSTRIAL ECOLOGY
LA English
DT Article
DE industrial ecology; industrial symbiosis; shoe and leather industry;
sustainable operations; utility sharing; waste reduction
ID INDUSTRIAL SYMBIOSIS
AB This research analyzes the Green City project in the town of Tres Coroas, Brazil. We describe its management system, evaluating the change process and the economic, social, and environmental benefits since the recycling center has been in service. We demonstrate a successful case of operational and cultural change in the disposal of industrial waste, describing the key points that helped the adoption of a new set of procedures, and illustrating the role of the champion in the implementation of a symbiotic cluster.
C1 [Ferrer, Geraldo] USN, Grad Sch Business & Publ Policy, Postgrad Sch, Monterey, CA 93943 USA.
[Cortezia, Sandro; Neumann, Jaqueline Morbach] Unisinos, Sao Leopoldo, Brazil.
[Neumann, Jaqueline Morbach] Fac Cenecista, Nova Petropolis, Brazil.
RP Ferrer, G (reprint author), USN, Grad Sch Business & Publ Policy, Postgrad Sch, Monterey, CA 93943 USA.
EM gferrer@nps.edu
OI Ferrer, Geraldo/0000-0003-1395-6143
NR 27
TC 4
Z9 4
U1 3
U2 22
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1088-1980
J9 J IND ECOL
JI J. Ind. Ecol.
PD FEB
PY 2012
VL 16
IS 1
BP 142
EP 152
DI 10.1111/j.1530-9290.2011.00442.x
PG 11
WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Engineering, Environmental;
Environmental Sciences
SC Science & Technology - Other Topics; Engineering; Environmental Sciences
& Ecology
GA 909MZ
UT WOS:000301570100016
ER
PT J
AU Lambrakos, SG
Zervaki, AD
Haidemenopoulos, GN
AF Lambrakos, S. G.
Zervaki, A. D.
Haidemenopoulos, G. N.
TI A Numerical Method for Inverse Thermal Analysis of Steady-State Energy
Deposition in Plate Structures
SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
LA English
DT Article
DE aluminum; modeling processes; welding
AB A numerical method for inverse thermal analysis of steady-state energy deposition in plate structures is constructed according to the general physical characteristics of energy deposition within a volume of material from a beam energy source. This numerical method represents implementation of a general methodology using basis functions that was introduced previously. The formal structure of the numerical method presented follows from a specific definition of the inverse heat transfer problem, which is well posed for inverse analysis of heat deposition processes. This definition is based on the assumption of the availability of information concerning spatially distributed boundary and constraint values. This information would be obtained in principle from both experimental measurements obtained in the laboratory, as well as numerical simulations performed using models having been constructed using basic theory. Experimental measurements include solidification cross sections, thermocouple measurements, and microstructural changes.
C1 [Lambrakos, S. G.] USN, Res Lab, Mat Sci & Technol Div, Ctr Computat Mat, Washington, DC 20375 USA.
[Zervaki, A. D.; Haidemenopoulos, G. N.] Univ Thessaly, Dept Mech Engn, Volos 38334, Greece.
RP Lambrakos, SG (reprint author), USN, Res Lab, Mat Sci & Technol Div, Ctr Computat Mat, Code 6390, Washington, DC 20375 USA.
EM lambrakos@anvil.nrl.navy.mil
RI Haidemenopoulos, Gregory/C-6496-2014
OI Haidemenopoulos, Gregory/0000-0001-9071-0118
FU Naval Research Laboratory (NRL); German Research Foundation DFG; Dr.
Alexander Drenker of Fraunhofer-Institut fur Lasertechnik
FX One of the authors (SGL) acknowledges the support by the Naval Research
Laboratory (NRL) internal core program and active scientific
collaboration with the University of Thessaly. The authors (ADZ, GNH)
would like to thank the German Research Foundation DFG for the support
of the depicted research within the Cluster of Excellence "Integrative
Production Technology for High-Wage Countries" at RWTH Aachen
University." Also ADZ acknowledges the support of Dr. Alexander Drenker
of Fraunhofer-Institut fur Lasertechnik during experimental work.
NR 8
TC 2
Z9 2
U1 0
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1059-9495
J9 J MATER ENG PERFORM
JI J. Mater. Eng. Perform.
PD FEB
PY 2012
VL 21
IS 2
BP 180
EP 190
DI 10.1007/s11665-011-9963-7
PG 11
WC Materials Science, Multidisciplinary
SC Materials Science
GA 912KZ
UT WOS:000301798200005
ER
PT J
AU Minton, TK
Wright, ME
Tomczak, SJ
Marquez, SA
Shen, LH
Brunsvold, AL
Cooper, R
Zhang, JM
Vij, V
Guenthner, AJ
Petteys, BJ
AF Minton, Timothy K.
Wright, Michael E.
Tomczak, Sandra J.
Marquez, Sara A.
Shen, Linhan
Brunsvold, Amy L.
Cooper, Russell
Zhang, Jianming
Vij, Vandana
Guenthner, Andrew J.
Petteys, Brian J.
TI Atomic Oxygen Effects on POSS Polyimides in Low Earth Orbit
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE hyperthermal atomic oxygen; polyimide; polyhedral oligomeric
silsesquioxane; POSS; space environment; polymer erosion; low Earth
orbit
ID OLIGOMERIC SILSESQUIOXANE POLYIMIDES; HYPERVELOCITY SPACE DEBRIS;
HYPERTHERMAL REACTIONS; SCATTERING DYNAMICS; HYDROCARBON SURFACE; O(P-3)
COLLISIONS; VUV RADIATION; FEP TEFLON; POLYMERS; EROSION
AB Kapton polyimde is extensively used in solar arrays, spacecraft thermal blankets, and space inflatable structures. Upon exposure to atomic oxygen in low Earth orbit (LEO), Kapton is severely eroded. An effective approach to prevent this erosion is to incorporate polyhedral oligomeric silsesquioxane (POSS.) into the polyimide matrix by copolymerizing POSS monomers with the polyimide precursor. The copolymerization of POSS provides Si and O in the polymer matrix on the nano level. During exposure of POSS polyimide to atomic oxygen, organic material is degraded, and a silica, passivation layer is formed. This silica layer protects the underlying polymer from further degradation. Laboratory and space-flight experiments have shown that POSS polyimides are highly resistant to atomic-oxygen attack, with erosion yields that may be as little as 1% those of Kapton. The results of all the studies indicate that POSS polyimide would be a space-survivable replacement for Kapton on spacecraft that operate in the LEO environment.
C1 [Minton, Timothy K.; Marquez, Sara A.; Shen, Linhan; Brunsvold, Amy L.; Cooper, Russell; Zhang, Jianming] Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA.
[Tomczak, Sandra J.] USAF, AFRL RZSB, Motor Branch, Res Lab, Edwards AFB, CA 93524 USA.
[Vij, Vandana] USAF, ERC Inc, Mat Applicat Branch, Res Lab, Edwards AFB, CA 93524 USA.
[Wright, Michael E.; Petteys, Brian J.] USN, Res & Engn Sci Dept, Div Chem, NAVAIR, China Lake, CA 93555 USA.
[Guenthner, Andrew J.] USAF, AFRL RZSM, Mat Applicat Branch, Res Lab, Edwards AFB, CA 93524 USA.
RP Minton, TK (reprint author), Montana State Univ, Dept Chem & Biochem, 103 Chem Biochem Bldg, Bozeman, MT 59717 USA.
EM tminton@montana.edu
RI Brunsvold, Amy/H-4315-2016
OI Brunsvold, Amy/0000-0001-9257-2978
FU Defense Advanced Research Projects Agency (DARPA); Air Force Office of
Scientific Research [F49620-01-1-0276, LRIR-92PL0COR]; National Science
Foundation [CHE-0943639]
FX This work was supported by the Defense Advanced Research Projects Agency
(DARPA), the Air Force Office of Scientific Research (Grants
F49620-01-1-0276 & LRIR-92PL0COR), and the National Science Foundation
(CHE-0943639).
NR 61
TC 36
Z9 40
U1 6
U2 68
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD FEB
PY 2012
VL 4
IS 2
BP 492
EP 502
DI 10.1021/am201509n
PG 11
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 897IW
UT WOS:000300644500002
PM 22188314
ER
PT J
AU Fulmer, PA
Wynne, JH
AF Fulmer, Preston A.
Wynne, James H.
TI Coatings Capable of Germinating and Neutralizing Bacillus anthracis
Endospores
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE endospores; germination; coatings; self-decontaminating; antimicrobial
surfaces; Bacillus anthracis; surfaces
ID SUBTILIS; SPORULATION; SPORES; PEPTIDOGLYCAN; MUTATIONS; OLIGOMERS;
BIOCIDES; DYNAMICS
AB Endospores are formed by various bacterial families, including Bacillus and Clostridium, in response to environmental stresses as a means to survive conditions inhospitable to vegetative growth. Although metabolically inert, the endospore must interact with its environment to determine an optimal time to return to a vegetative state, a process known as germination. Germination has been shown to occur in response to a variety of chemical stimuli from specific nutrient germinants including amino acids, sugars and nucleosides. This process is known to be mediated primarily by the GerA family of spore-specific receptor proteins which initiates a signal transduction cascade that results in a return of oxidative metabolism in response to germinant receptor interactions. Herein, we report the development of a novel coating system capable. of germinating B. anthracis endospores, followed by rapid killing of the vegetative bacteria by a novel incorporated amphiphilic biocide: The most effective formulation tested exhibited an ability to germinate and kill B. anthracis endospores and vegetative bacteria, respectively. The formulation reported resulted in a 90% reduction in as little as 5 min, and a 6 log reduction by 45 min.
C1 [Fulmer, Preston A.; Wynne, James H.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
RP Wynne, JH (reprint author), USN, Res Lab, Div Chem, Code 6100,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM james.wynne@nrl.navy.mil
RI Fulmer, Preston/L-7702-2014
OI Fulmer, Preston/0000-0002-2981-576X
FU U.S. Naval Research Laboratory (NRL); Office of Naval Research (ONR)
FX This work was funded by the U.S. Naval Research Laboratory (NRL) and the
Office of Naval Research (ONR). The authors thank Drs. Joanne
Jones-Meehan and William Straube for their assistance in the preparation
of this manuscript.
NR 34
TC 3
Z9 3
U1 0
U2 3
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD FEB
PY 2012
VL 4
IS 2
BP 738
EP 743
DI 10.1021/am201362u
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 897IW
UT WOS:000300644500036
PM 22211260
ER
PT J
AU Jarosz, PR
Shaukat, A
Schauerman, CM
Cress, CD
Kladitis, PE
Ridgley, RD
Landi, BJ
AF Jarosz, Paul R.
Shaukat, Aalyia
Schauerman, Christopher M.
Cress, Cory D.
Kladitis, Paul E.
Ridgley, Richard D.
Landi, Brian J.
TI High-Performance, Lightweight Coaxial Cable from Carbon Nanotube
Conductors
SO ACS APPLIED MATERIALS & INTERFACES
LA English
DT Article
DE carbon nanotubes; lightweight coaxial cable; attenuation; high
frequency; chemical treatment; performance enhancement
ID ELECTRICAL-CONDUCTIVITY; FIBERS; TRANSPORT; YARNS; FILMS
AB Coaxial cables have been constructed with carbon nanotube (CNT) materials serving as both the inner and outer conductors. Treatment of the CNT outer and inner conductors with KAuBr4 was found to significantly reduce the attenuation of these cables, which demonstrates that chemical agents can be used to improve. power transmission through CNT networks at high frequencies (150 kHz-3 GHz). For cables constructed with a KAuBr4-treated CNT outer conductor, power attenuation per length approaches parity with cables constructed from metallic conductors at significantly lower weight per length (i.e., 7.1 g/m for CNT designs compared to 38.8 g/m for an RG-58 design). A relationship between the thickness of the CNT outer conductor and the cable attenuation was observed and used to estimate the effective skin depth at high frequency. These results establish reliable, reproducible methods for the construction of coaxial cables from CNT materials that can facilitate further investigation of their performance in high frequency transmission structures, and highlight a specific opportunity for significant reduction in coaxial cable mass.
C1 [Landi, Brian J.] Rochester Inst Technol, Dept Chem & Biomed Engn, Golisano Inst Sustainabil, NanoPower Res Labs, Rochester, NY 14623 USA.
[Cress, Cory D.] USN, Res Lab, Washington, DC 20375 USA.
[Kladitis, Paul E.] USAF, Dept Elect Engn, Inst Technol, Wright Patterson AFB, OH 45433 USA.
RP Landi, BJ (reprint author), Rochester Inst Technol, Dept Chem & Biomed Engn, Golisano Inst Sustainabil, NanoPower Res Labs, Rochester, NY 14623 USA.
EM brian.landi@rit.edu
OI Cress, Cory/0000-0001-7563-6693
FU Tyco Electronics; U.S. Government; Intelligence Community; Office of the
Director of National Intelligence; Defense Threat Reduction Agency
(DTRA) [HDTRA-1-10-1-0122]
FX The authors acknowledge Tyco Electronics for partial support and
technical discussions. The authors gratefully acknowledge financial
support from the U.S. Government, including a grant from the
Intelligence Community Postdoctoral Research Fellowship Program through
funding from the Office of the Director of National Intelligence, as
well as the Defense Threat Reduction Agency (DTRA) under Grant
HDTRA-1-10-1-0122. The authors also thank Nanocomp Technologies, Inc.
for providing CNT materials used in this effort.
NR 38
TC 12
Z9 13
U1 8
U2 37
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1944-8244
J9 ACS APPL MATER INTER
JI ACS Appl. Mater. Interfaces
PD FEB
PY 2012
VL 4
IS 2
BP 1103
EP 1109
DI 10.1021/am201729g
PG 7
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 897IW
UT WOS:000300644500087
PM 22272936
ER
PT J
AU McClatchey, SK
Lane, RG
Kubis, KC
Boisvert, C
AF McClatchey, Scott K.
Lane, R. Gary
Kubis, Kenneth C.
Boisvert, Chantal
TI Competency checklists for strabismus surgery and retinopathy of
prematurity examination
SO JOURNAL OF AAPOS
LA English
DT Article
ID OPHTHALMOLOGY RESIDENCY; CATARACT-SURGERY; CURRICULUM; SKILLS
AB PURPOSE To evaluate two checklist tools that are designed to guide, document, and assess resident training in strabismus surgery and examination of infants at risk for retinopathy of prematurity (ROP).
METHODS A panel of staff surgeons from several teaching institutions evaluated the checklists and provided constructive feedback. All former residents who had been trained via the use of these checklist tools were asked to take self-assessment surveys on competency in strabismus surgery and ROP examination. A Likert 5-point scale was used for all evaluations, with 1 being the lowest rating and 5 the highest rating.
RESULTS Six experts in strabismus and seven in ROP rated the checklists. Their comments were used to revise the checklists, which were sent to the same group for reevaluation. The mean Likert score for the final checklists was 4.9 of 5.0 for both checklists. Of 16 former residents, 9 responded to the self-assessments with a mean overall score of 4.1 (of 5.0) for strabismus surgery and 3.9 for ROP examination.
CONCLUSIONS These checklist tools can be used to assess the quality of a resident's training and experience in these specific ophthalmology skills. They are complementary to other curriculum and assessment tools and can serve to organize the educational experience while ensuring a uniformity of training. (J AAPOS 2012;16:75-79)
C1 [McClatchey, Scott K.; Kubis, Kenneth C.] USN, San Diego Med Ctr, Dept Ophthalmol, San Diego, CA USA.
[McClatchey, Scott K.; Kubis, Kenneth C.] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
[McClatchey, Scott K.] Loma Linda Univ, Med Ctr, Loma Linda, CA USA.
[Lane, R. Gary] Univ Texas Hlth Sci Ctr San Antonio, Dept Ophthalmol, San Antonio, TX 78229 USA.
[Boisvert, Chantal] Univ New Mexico, Dept Surg, Div Ophthalmol, Hlth Sci Ctr, Albuquerque, NM 87131 USA.
RP McClatchey, SK (reprint author), USN, Bob Wilson Med Ctr, Ophthalmol Suite 202,34520 Bob Wilson Dr, San Diego, CA 92134 USA.
EM Scott.McClatchey@med.navy.mil
NR 15
TC 3
Z9 3
U1 0
U2 2
PU MOSBY-ELSEVIER
PI NEW YORK
PA 360 PARK AVENUE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1091-8531
J9 J AAPOS
JI J. AAPOS
PD FEB
PY 2012
VL 16
IS 1
BP 75
EP 79
DI 10.1016/j.jaapos.2011.09.008
PG 5
WC Ophthalmology; Pediatrics
SC Ophthalmology; Pediatrics
GA 905VQ
UT WOS:000301304700019
PM 22370670
ER
PT J
AU Penano, J
Sprangle, P
Hafizi, B
Gordon, D
Fernsler, R
Scully, M
AF Penano, Joseph
Sprangle, Phillip
Hafizi, Bahman
Gordon, Daniel
Fernsler, Richard
Scully, Marian
TI Remote lasing in air by recombination and electron impact excitation of
molecular nitrogen
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID TEMPERATURE-DEPENDENCE; TRANSPARENT MEDIA; LASER-PULSE; FILAMENTATION;
FLUORESCENCE; HELIUM; PLASMA
AB We analyze and simulate the physical mechanisms for a remote atmospheric lasing configuration which utilizes a combination of an ultrashort pulse laser to form a plasma filament of seed electrons, and a heater beam to heat the seed electrons. Nitrogen molecules are excited by electron impact and recombination processes to induce lasing in the ultraviolet. Recombination excitation, thermal excitation, gain, and saturation are analyzed and simulated. The lasing gain is sufficiently high to reach saturation within the length of the plasma filament. A remotely generated ultraviolet source may have applications for standoff detection of biological and chemical agents. (C) 2012 American Institute of Physics. [doi:10.1063/1.3681282]
C1 [Penano, Joseph; Sprangle, Phillip; Gordon, Daniel; Fernsler, Richard] USN, Div Plasma Phys, Res Lab, Washington, DC 20375 USA.
[Hafizi, Bahman] Icarus Res Inc, Bethesd, MD 20824 USA.
[Scully, Marian] Texas A&M Univ, Dept Phys & Elect Engn, College Stn, TX 77843 USA.
[Scully, Marian] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA.
[Scully, Marian] Princeton Univ, Dept Aerosp & Mech Engn, Princeton, NJ 08544 USA.
RP Penano, J (reprint author), USN, Div Plasma Phys, Res Lab, Washington, DC 20375 USA.
EM joseph.penano@nrl.navy.mil
FU NRL [6.1]
FX The authors are greatful to Dr. S. Suckewer and Dr. A. Zigler for useful
discussions. This work was supported by NRL 6.1 funding.
NR 32
TC 28
Z9 29
U1 1
U2 25
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD FEB 1
PY 2012
VL 111
IS 3
AR 033105
DI 10.1063/1.3681282
PG 8
WC Physics, Applied
SC Physics
GA 902HS
UT WOS:000301029800006
ER
PT J
AU Liebman, KA
Stoddard, ST
Morrison, AC
Rocha, C
Minnick, S
Sihuincha, M
Russell, KL
Olson, JG
Blair, PJ
Watts, DM
Kochel, T
Scott, TW
AF Liebman, Kelly A.
Stoddard, Steven T.
Morrison, Amy C.
Rocha, Claudio
Minnick, Sharon
Sihuincha, Moises
Russell, Kevin L.
Olson, James G.
Blair, Patrick J.
Watts, Douglas M.
Kochel, Tadeusz
Scott, Thomas W.
TI Spatial Dimensions of Dengue Virus Transmission across Interepidemic and
Epidemic Periods in Iquitos, Peru (1999-2003)
SO PLOS NEGLECTED TROPICAL DISEASES
LA English
DT Article
ID AEDES-AEGYPTI DIPTERA; PLASMODIUM-FALCIPARUM INFECTION;
HEMORRHAGIC-FEVER; DISPERSAL; CULICIDAE; PATTERNS; THAILAND; VILLAGE;
DETERMINANTS; SURVEILLANCE
AB Background: Knowledge of spatial patterns of dengue virus (DENV) infection is important for understanding transmission dynamics and guiding effective disease prevention strategies. Because movement of infected humans and mosquito vectors plays a role in the spread and persistence of virus, spatial dimensions of transmission can range from small household foci to large community clusters. Current understanding is limited because past analyses emphasized clinically apparent illness and did not account for the potentially large proportion of inapparent infections. In this study we analyzed both clinically apparent and overall infections to determine the extent of clustering among human DENV infections.
Methodology/Principal Findings: We conducted spatial analyses at global and local scales, using acute case and seroconversion data from a prospective longitudinal cohort in Iquitos, Peru, from 1999-2003. Our study began during a period of interepidemic DENV-1 and DENV-2 transmission and transitioned to epidemic DENV-3 transmission. Infection status was determined by seroconversion based on plaque neutralization testing of sequential blood samples taken at approximately six-month intervals, with date of infection assigned as the middate between paired samples. Each year was divided into three distinct seasonal periods of DENV transmission. Spatial heterogeneity was detected in baseline seroprevalence for DENV-1 and DENV-2. Cumulative DENV-3 seroprevalence calculated by trimester from 2001-2003 was spatially similar to preexisting DENV-1 and DENV-2 seroprevalence. Global clustering (case-control Ripley's K statistic) appeared at radii of similar to 200-800 m. Local analyses (Kuldorf spatial scan statistic) identified eight DENV-1 and 15 DENV-3 clusters from 1999-2003. The number of seroconversions per cluster ranged from 3-34 with radii from zero (a single household) to 750 m; 65% of clusters had radii >100 m. No clustering was detected among clinically apparent infections.
Conclusions/Significance: Seroprevalence of previously circulating DENV serotypes can be a predictor of transmission risk for a different invading serotype and, thus, identify targets for strategically placed surveillance and intervention. Seroprevalence of a specific serotype is also important, but does not preclude other contributing factors, such as mosquito density, in determining where transmission of that virus will occur. Regardless of the epidemiological context or virus serotype, human movement appears to be an important factor in defining the spatial dimensions of DENV transmission and, thus, should be considered in the design and evaluation of surveillance and intervention strategies.
C1 [Liebman, Kelly A.; Stoddard, Steven T.; Morrison, Amy C.; Minnick, Sharon; Scott, Thomas W.] Univ Calif Davis, Dept Entomol, Davis, CA 95616 USA.
[Stoddard, Steven T.; Scott, Thomas W.] NIH, Fogarty Int Ctr, Bethesda, MD 20892 USA.
[Morrison, Amy C.; Rocha, Claudio; Russell, Kevin L.; Olson, James G.; Blair, Patrick J.; Kochel, Tadeusz] USN, Med Res Ctr Detachment, Washington, DC USA.
[Sihuincha, Moises] Hosp Apoyo Iquitos, Region Loreto, Peru.
[Watts, Douglas M.] Univ Texas El Paso, El Paso, TX 79968 USA.
RP Liebman, KA (reprint author), Univ Calif Davis, Dept Entomol, Davis, CA 95616 USA.
EM kaliebman@ucdavis.edu
RI Valle, Ruben/A-7512-2013
FU National Institute of Allergy and Infectious Disease; Military
Infectious Disease Research Program [S0025_02_LI]; Loreto Regional
Health Department
FX This research was supported by a grant from the National Institute of
Allergy and Infectious Disease and the Military Infectious Disease
Research Program grant number S0025_02_LI. The funders had no role in
study design, data collection and analysis, decision to publish, or
preparation of the manuscript.; We thank the residents of Iquitos, Peru,
for allowing us to undertake this study in and around their homes. We
greatly appreciate support of the Loreto Regional Health Department,
including Drs. Carlos Calampa, Jorge Reyes, Ruben Naupay, Carlos Vidal,
Hugo Rodriguez, and Martin Casapia, who all facilitated our work in
Iquitos. Karla Block supervised the phlebotomy team and provided
logistical support for the project. We thank Renan Ricarte Ruiz Chavez
for processing blood samples and keeping the phlebotomy team happy and
Leslye Angulo for tracking down student participants. Serological
Surveys were carried out by Joel Cahuachi Tuesta, Jacqueline Cardenas
Perez, Junnelhy Mireya Flores Lopez, Juan Flores Michi, Marcelina Flores
Michi, Elga Lopez Guerrero, Xiomara Mafaldo Garcia, Nora Marin Moreno,
Maria Juana Martinez Salas, Orfelinda Morales Tejada, Geraldine Ocmin
Galan, Zenith Maria Pezo Villacorta, Zoila Martha Reategui Chota, Luis
Riveros Lopez, Rubiela Nerza Rubio Briceno, Rosana Magaly Soltero
Jimenez, Zenith Tamani Guerrero, Moises Tanchiva Tuanama, Sarita Del
Pilar Tuesta Davila. Angelica Espinoza, Roxana Caceda, and Roger Castio
for carrying out the serological testing, Carolina Guevara for
supervision of the NMRCD virology laboratory, and Juan Perez for data
management. Dr. Truman Sharp, Ms. Lucy Rubio, and Ms. Roxana Lescano of
the U.S. Naval Medical Research Center in Lima, Peru, were instrumental
in facilitating these studies. We also thank Brett Forshey, William K.
Reisen, and David Smith for their comments on earlier drafts.
NR 51
TC 27
Z9 27
U1 1
U2 27
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1935-2735
J9 PLOS NEGLECT TROP D
JI Plos Neglect. Trop. Dis.
PD FEB
PY 2012
VL 6
IS 2
AR e1472
DI 10.1371/journal.pntd.0001472
PG 12
WC Infectious Diseases; Parasitology; Tropical Medicine
SC Infectious Diseases; Parasitology; Tropical Medicine
GA 901FX
UT WOS:000300949200005
PM 22363822
ER
PT J
AU Ackermann, M
Ajello, M
Allafort, A
Baldini, L
Ballet, J
Barbiellini, G
Bastieri, D
Belfiore, A
Bellazzini, R
Berenji, B
Blandford, RD
Bloom, ED
Bonamente, E
Borgland, AW
Bottacini, E
Bregeon, J
Brigida, M
Bruel, P
Buehler, R
Buson, S
Caliandro, GA
Cameron, RA
Caraveo, PA
Casandjian, JM
Cecchi, C
Chekhtman, A
Ciprini, S
Claus, R
Cohen-Tanugi, J
de Angelis, A
de Palma, F
Dermer, CD
Silva, EDE
Drell, PS
Dumora, D
Favuzzi, C
Fegan, SJ
Focke, WB
Fortin, P
Fukazawa, Y
Fusco, P
Gargano, F
Germani, S
Giglietto, N
Giordano, F
Giroletti, M
Glanzman, T
Godfrey, G
Grenier, IA
Guillemot, L
Guiriec, S
Hadasch, D
Hanabata, Y
Harding, AK
Hayashida, M
Hayashi, K
Hays, E
Johannesson, G
Johnson, AS
Kamae, T
Katagiri, H
Kataoka, J
Kerr, M
Knodlseder, J
Kuss, M
Lande, J
Latronico, L
Lee, SH
Longo, F
Loparco, F
Lott, B
Lovellette, MN
Lubrano, P
Martin, P
Mazziotta, MN
McEnery, JE
Mehault, J
Michelson, PF
Mitthumsiri, W
Mizuno, T
Monte, C
Monzani, ME
Morselli, A
Moskalenko, IV
Murgia, S
Naumann-Godo, M
Nolan, PL
Norris, JP
Nuss, E
Ohsugi, T
Okumura, A
Omodei, N
Orlando, E
Ormes, JF
Ozaki, M
Paneque, D
Parent, D
Pesce-Rollins, M
Pierbattista, M
Piron, F
Porter, TA
Raino, S
Rando, R
Razzano, M
Reimer, O
Reposeur, T
Ritz, S
Parkinson, PMS
Sgro, C
Siskind, EJ
Smith, PD
Spinelli, P
Strong, AW
Takahashi, H
Tanaka, T
Thayer, JG
Thayer, JB
Thompson, DJ
Tibaldo, L
Torres, DF
Tosti, G
Tramacere, A
Troja, E
Uchiyama, Y
Vandenbroucke, J
Vasileiou, V
Vianello, G
Vitale, V
Waite, AP
Wang, P
Winer, BL
Wood, KS
Yang, Z
Zimmer, S
Bontemps, S
AF Ackermann, M.
Ajello, M.
Allafort, A.
Baldini, L.
Ballet, J.
Barbiellini, G.
Bastieri, D.
Belfiore, A.
Bellazzini, R.
Berenji, B.
Blandford, R. D.
Bloom, E. D.
Bonamente, E.
Borgland, A. W.
Bottacini, E.
Bregeon, J.
Brigida, M.
Bruel, P.
Buehler, R.
Buson, S.
Caliandro, G. A.
Cameron, R. A.
Caraveo, P. A.
Casandjian, J. M.
Cecchi, C.
Chekhtman, A.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
de Angelis, A.
de Palma, F.
Dermer, C. D.
do Couto e Silva, E.
Drell, P. S.
Dumora, D.
Favuzzi, C.
Fegan, S. J.
Focke, W. B.
Fortin, P.
Fukazawa, Y.
Fusco, P.
Gargano, F.
Germani, S.
Giglietto, N.
Giordano, F.
Giroletti, M.
Glanzman, T.
Godfrey, G.
Grenier, I. A.
Guillemot, L.
Guiriec, S.
Hadasch, D.
Hanabata, Y.
Harding, A. K.
Hayashida, M.
Hayashi, K.
Hays, E.
Johannesson, G.
Johnson, A. S.
Kamae, T.
Katagiri, H.
Kataoka, J.
Kerr, M.
Knoedlseder, J.
Kuss, M.
Lande, J.
Latronico, L.
Lee, S. -H.
Longo, F.
Loparco, F.
Lott, B.
Lovellette, M. N.
Lubrano, P.
Martin, P.
Mazziotta, M. N.
McEnery, J. E.
Mehault, J.
Michelson, P. F.
Mitthumsiri, W.
Mizuno, T.
Monte, C.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Murgia, S.
Naumann-Godo, M.
Nolan, P. L.
Norris, J. P.
Nuss, E.
Ohsugi, T.
Okumura, A.
Omodei, N.
Orlando, E.
Ormes, J. F.
Ozaki, M.
Paneque, D.
Parent, D.
Pesce-Rollins, M.
Pierbattista, M.
Piron, F.
Porter, T. A.
Raino, S.
Rando, R.
Razzano, M.
Reimer, O.
Reposeur, T.
Ritz, S.
Parkinson, P. M. Saz
Sgro, C.
Siskind, E. J.
Smith, P. D.
Spinelli, P.
Strong, A. W.
Takahashi, H.
Tanaka, T.
Thayer, J. G.
Thayer, J. B.
Thompson, D. J.
Tibaldo, L.
Torres, D. F.
Tosti, G.
Tramacere, A.
Troja, E.
Uchiyama, Y.
Vandenbroucke, J.
Vasileiou, V.
Vianello, G.
Vitale, V.
Waite, A. P.
Wang, P.
Winer, B. L.
Wood, K. S.
Yang, Z.
Zimmer, S.
Bontemps, S.
TI The cosmic-ray and gas content of the Cygnus region as measured in
gamma-rays by the Fermi Large Area Telescope
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE ISM: abundances; ISM: clouds; cosmic rays; gamma rays: ISM
ID BLIND FREQUENCY SEARCHES; GALACTIC PLANE SURVEY; MILKY-WAY; SUPERNOVA
REMNANT; INFRARED-EMISSION; MOLECULAR CLOUDS; DARK GAS; OUTER GALAXY;
X-RAY; H-I
AB Context. The Cygnus region hosts a giant molecular-cloud complex that actively forms massive stars. Interactions of cosmic rays with interstellar gas and radiation fields make it shine at gamma-ray energies. Several gamma-ray pulsars and other energetic sources are seen in this direction.
Aims. In this paper we analyze the gamma-ray emission measured by the Fermi Large Area Telescope (LAT) in the energy range from 100 MeV to 100 GeV in order to probe the gas and cosmic-ray content on the scale of the whole Cygnus complex. The gamma-ray emission on the scale of the central massive stellar clusters and from individual sources is addressed elsewhere.
Methods. The signal from bright pulsars is greatly reduced by selecting photons in their off-pulse phase intervals. We compare the diffuse gamma-ray emission with interstellar gas maps derived from radio/mm-wave lines and visual extinction data. A general model of the region, including other pulsars and gamma-ray sources, is sought.
Results. The integral HI emissivity above 100 MeV averaged over the whole Cygnus complex amounts to [2.06 +/- 0.11 (stat.) (+0.15)(-0.84) (syst.)] x 10(-26) photons s(-1) sr(-1) H-atom(-1), where the systematic error is dominated by the uncertainty on the HI opacity to calculate its column densities. The integral emissivity and its spectral energy distribution are both consistent within the systematics with LAT measurements in the interstellar space near the solar system. The average X-CO = N(H-2)/W-CO ratio is found to be [1.68 +/- 0.05 (stat.) (+0.87)(-0.10) (H I opacity)] x 10(20) molecules cm(-2) (K km s(-1))(-1), consistent with other LAT measurements in the Local Arm. We detect significant gamma-ray emission from dark neutral gas for a mass corresponding to similar to 40% of what is traced by CO. The total interstellar mass in the Cygnus complex inferred from its gamma-ray emission amounts to 8 (+5)(-1) x 10(6) M-circle dot at a distance of 1.4 kpc.
Conclusions. Despite the conspicuous star formation activity and high masses of the interstellar clouds, the cosmic-ray population in the Cygnus complex averaged over a few hundred parsecs is similar to that of the local interstellar space.
C1 [Ackermann, M.; Ajello, M.; Allafort, A.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Borgland, A. W.; Bottacini, E.; Buehler, R.; Cameron, R. A.; Claus, R.; do Couto e Silva, E.; Drell, P. S.; Focke, W. B.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Johnson, A. S.; Kamae, T.; Kerr, M.; Lande, J.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Nolan, P. L.; Okumura, A.; Omodei, N.; Orlando, E.; Paneque, D.; Porter, T. A.; Reimer, O.; Tanaka, T.; Thayer, J. G.; Thayer, J. B.; Tramacere, A.; Uchiyama, Y.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wang, P.] Stanford Univ, Dept Phys, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA.
[Ackermann, M.; Ajello, M.; Allafort, A.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Borgland, A. W.; Bottacini, E.; Buehler, R.; Cameron, R. A.; Claus, R.; do Couto e Silva, E.; Drell, P. S.; Focke, W. B.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Johnson, A. S.; Kamae, T.; Kerr, M.; Lande, J.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Nolan, P. L.; Okumura, A.; Omodei, N.; Orlando, E.; Paneque, D.; Porter, T. A.; Reimer, O.; Tanaka, T.; Thayer, J. G.; Thayer, J. B.; Tramacere, A.; Uchiyama, Y.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wang, P.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
[Baldini, L.; Bellazzini, R.; Bregeon, J.; Kuss, M.; Latronico, L.; Pesce-Rollins, M.; Razzano, M.; Sgro, C.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Ballet, J.; Casandjian, J. M.; Grenier, I. A.; Naumann-Godo, M.; Pierbattista, M.; Tibaldo, L.] Univ Paris Diderot, CEA Saclay, Serv Astrophys, Lab AIM,CEA,IRFU,CNRS, F-91191 Gif Sur Yvette, France.
[Barbiellini, G.; Longo, F.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Barbiellini, G.; Longo, F.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
[Bastieri, D.; Buson, S.; Rando, R.; Tibaldo, L.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Bastieri, D.; Buson, S.; Rando, R.; Tibaldo, L.] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
[Belfiore, A.; Caraveo, P. A.] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy.
[Bonamente, E.; Cecchi, C.; Germani, S.; Lubrano, P.; Tosti, G.] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy.
[Bonamente, E.; Cecchi, C.; Ciprini, S.; Germani, S.; Lubrano, P.; Tosti, G.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Univ Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Politecn Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Gargano, F.; Giglietto, N.; Giordano, F.; Loparco, F.; Mazziotta, M. N.; Monte, C.; Raino, S.; Spinelli, P.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Bruel, P.; Fegan, S. J.; Fortin, P.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Caliandro, G. A.; Hadasch, D.; Torres, D. F.] Inst Ciencies Espai IEEE CSIC, Barcelona 08193, Spain.
[Chekhtman, A.] Artep Inc, Ellicott City, MD 21042 USA.
[Ciprini, S.] ASI Sci Data Ctr, I-00044 Rome, Italy.
[Cohen-Tanugi, J.; Mehault, J.; Nuss, E.; Piron, F.; Vasileiou, V.] Univ Montpellier 2, CNRS, IN2P3, Lab Univers & Particules Montpellier, Montpellier, France.
[de Angelis, A.] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy.
[de Angelis, A.] Ist Nazl Fis Nucl, Sez Trieste, Grp Collegato Udine, I-33100 Udine, Italy.
[Dermer, C. D.; Lovellette, M. N.; Wood, K. S.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Dumora, D.; Lott, B.; Reposeur, T.] Univ Bordeaux 1, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France.
[Fukazawa, Y.; Hanabata, Y.; Hayashi, K.; Mizuno, T.] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan.
[Giroletti, M.] INAF Ist Radioastron, I-40129 Bologna, Italy.
[Guiriec, S.] Univ Alabama, CSPAR, Huntsville, AL 35899 USA.
[Harding, A. K.; Hays, E.; McEnery, J. E.; Thompson, D. J.; Troja, E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Johannesson, G.] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland.
[Katagiri, H.] Ibaraki Univ, Coll Sci, Bunkyo Ku, Mito, Ibaraki 3108512, Japan.
[Kataoka, J.] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan.
[Knoedlseder, J.] IRAP, CNRS, F-31028 Toulouse 4, France.
[Knoedlseder, J.] Univ Toulouse, UPS, OMP, IRAP, Toulouse, France.
[Lee, S. -H.] Kyoto Univ, Yukawa Inst Theoret Phys, Sakyo Ku, Kyoto 6068502, Japan.
[Martin, P.; Orlando, E.; Strong, A. W.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[McEnery, J. E.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[McEnery, J. E.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Morselli, A.; Vitale, V.] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.
[Norris, J. P.] Boise State Univ, Dept Phys, Boise, ID 83725 USA.
[Ohsugi, T.; Takahashi, H.] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan.
[Okumura, A.; Ozaki, M.] JAXA, Inst Space & Astronaut Sci, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan.
[Ormes, J. F.] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA.
[Paneque, D.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Parent, D.] George Mason Univ, Coll Sci, Ctr Earth Observing & Space Res, Fairfax, VA 22030 USA.
[Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria.
[Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria.
[Ritz, S.; Parkinson, P. M. Saz] Univ Calif Santa Cruz, Dept Phys, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA.
[Ritz, S.; Parkinson, P. M. Saz] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Siskind, E. J.] NYCB Real Time Comp Inc, Lattingtown, NY 11560 USA.
[Smith, P. D.; Winer, B. L.] Ohio State Univ, Dept Phys, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA.
[Torres, D. F.] ICREA, Barcelona, Spain.
[Tramacere, A.; Vianello, G.] CIFS, I-10133 Turin, Italy.
[Tramacere, A.] INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland.
[Troja, E.] NASA, Postdoctoral Program, Greenbelt, MD 20771 USA.
[Vitale, V.] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
[Yang, Z.; Zimmer, S.] Stockholm Univ, Dept Phys, S-10691 Stockholm, Sweden.
[Yang, Z.; Zimmer, S.] Oskar Klein Ctr Cosmoparticle Phys, S-10691 Stockholm, Sweden.
[Bontemps, S.] Univ Bordeaux, CNRS, INSU, Lab Astrophys Bordeaux, Floirac, France.
RP Ackermann, M (reprint author), Stanford Univ, Dept Phys, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA.
EM isabelle.grenier@cea.fr; luigi.tibaldo@pd.infn.it
RI Thompson, David/D-2939-2012; Harding, Alice/D-3160-2012; Hays,
Elizabeth/D-3257-2012; McEnery, Julie/D-6612-2012; Baldini,
Luca/E-5396-2012; lubrano, pasquale/F-7269-2012; Tosti,
Gino/E-9976-2013; Saz Parkinson, Pablo Miguel/I-7980-2013; Ozaki,
Masanobu/K-1165-2013; Morselli, Aldo/G-6769-2011; Kuss,
Michael/H-8959-2012; giglietto, nicola/I-8951-2012; Reimer,
Olaf/A-3117-2013; Rando, Riccardo/M-7179-2013; Loparco,
Francesco/O-8847-2015; Johannesson, Gudlaugur/O-8741-2015; Gargano,
Fabio/O-8934-2015; Moskalenko, Igor/A-1301-2007; Mazziotta, Mario
/O-8867-2015; Sgro, Carmelo/K-3395-2016; Torres, Diego/O-9422-2016;
Orlando, E/R-5594-2016;
OI Thompson, David/0000-0001-5217-9135; lubrano,
pasquale/0000-0003-0221-4806; Morselli, Aldo/0000-0002-7704-9553;
giglietto, nicola/0000-0002-9021-2888; Reimer, Olaf/0000-0001-6953-1385;
Loparco, Francesco/0000-0002-1173-5673; Johannesson,
Gudlaugur/0000-0003-1458-7036; Gargano, Fabio/0000-0002-5055-6395;
Moskalenko, Igor/0000-0001-6141-458X; Mazziotta, Mario
/0000-0001-9325-4672; Torres, Diego/0000-0002-1522-9065; Giordano,
Francesco/0000-0002-8651-2394; De Angelis,
Alessandro/0000-0002-3288-2517; Caraveo, Patrizia/0000-0003-2478-8018;
Sgro', Carmelo/0000-0001-5676-6214; Rando, Riccardo/0000-0001-6992-818X
FU National Aeronautics and Space Administration; Department of Energy in
the US; Commissariat a l'Energie Atomique; Centre National de la
Recherche Scientifique/Institut National de Physique Nucleaire et de
Physique des Particules in France; Agenzia Spaziale Italiana; Istituto
Nazionale di Fisica Nucleare in Italy; Ministry of Education, Culture,
Sports, Science and Technology (MEXT); High Energy Accelerator Research
Organization (KEK); Japan Aerospace Exploration Agency (JAXA) in Japan;
K. A. Wallenberg Foundation; Swedish Research Council; Swedish National
Space Board in Sweden; Istituto Nazionale di Astrofisica in Italy;
Centre National d'Etudes Spatiales in France; Natural Sciences and
Engineering Research Council of Canada
FX The Fermi LAT Collaboration acknowledges generous ongoing support from a
number of agencies and institutes that have supported both the
development and the operation of the LAT, as well as scientific data
analysis. These include the National Aeronautics and Space
Administration and the Department of Energy in the US, the Commissariat
a l'Energie Atomique and the Centre National de la Recherche
Scientifique/Institut National de Physique Nucleaire et de Physique des
Particules in France, the Agenzia Spaziale Italiana and the Istituto
Nazionale di Fisica Nucleare in Italy, the Ministry of Education,
Culture, Sports, Science and Technology (MEXT), High Energy Accelerator
Research Organization (KEK) and Japan Aerospace Exploration Agency
(JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish
Research Council, and the Swedish National Space Board in Sweden.
Additional support for science analysis during the operations phase is
gratefully acknowledged from the Istituto Nazionale di Astrofisica in
Italy and the Centre National d'Etudes Spatiales in France. We made use
of data from the Canadian Galactic Plane Survey (CGPS). CGPS is a
Canadian project with international partners. The Dominion Radio
Astrophysical Observatory is operated as a national facility by the
National Research Council of Canada. The CGPS is supported by a grant
from the Natural Sciences and Engineering Research Council of Canada. We
thank T. M. Dame for providing the moment-masked CO data.
NR 72
TC 17
Z9 17
U1 0
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 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD FEB
PY 2012
VL 538
AR A71
DI 10.1051/0004-6361/201117539
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 897AX
UT WOS:000300614100071
ER
PT J
AU Giroletti, M
Hada, K
Giovannini, G
Casadio, C
Beilicke, M
Cesarini, A
Cheung, CC
Doi, A
Krawczynski, H
Kino, M
Lee, NP
Nagai, H
AF Giroletti, M.
Hada, K.
Giovannini, G.
Casadio, C.
Beilicke, M.
Cesarini, A.
Cheung, C. C.
Doi, A.
Krawczynski, H.
Kino, M.
Lee, N. P.
Nagai, H.
TI The kinematic of HST-1 in the jet of M 87
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE galaxies: jets; radio continuum: galaxies; galaxies: nuclei
ID RADIO GALAXY M87; GAMMA-RAY EMISSION; CENTRAL BLACK-HOLE; VARIABILITY;
KNOT; SITE
AB Aims. We aim to constrain the structural variations within the HST-1 region downstream of the radio jet of M 87, in general as well as in connection to the episodes of activity at very high energy (VHE).
Methods. We analyzed and compared 26 VLBI observations of the M 87 jet, obtained between 2006 and 2011 with the Very Long Baseline Array (VLBA) at 1.7 GHz and the European VLBI Network (EVN) at 5 GHz.
Results. HST-1 is detected at all epochs; we model-fitted its complex structure with two or more components, the two outermost of which display a significant proper motion with a superluminal velocity around similar to 4c. The motion of a third feature that is detected upstream is more difficult to characterize. The overall position angle of HST-1 has changed during the time of our observations from -65 degrees to -90 degrees, while the structure has moved by over 80 mas downstream. Our results on the component evolution suggest that structural changes at the upstream edge of HST-1 can be related to the VHE events.
C1 [Giroletti, M.; Giovannini, G.] INAF Ist Radioastron, I-40129 Bologna, Italy.
[Hada, K.] Grad Univ Adv Studies SOKENDAI, Mitaka, Tokyo 1818588, Japan.
[Hada, K.; Kino, M.; Nagai, H.] Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.
[Giovannini, G.] Dipartimento Astron, I-40127 Bologna, Italy.
[Casadio, C.] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain.
[Beilicke, M.; Krawczynski, H.] Washington Univ, Dept Phys, St Louis, MO 63130 USA.
[Cesarini, A.] Natl Univ Ireland, Sch Phys, Galway, Ireland.
[Cheung, C. C.] Natl Acad Sci, Natl Res Council, Washington, DC 20001 USA.
[Cheung, C. C.] USN, Res Lab, Washington, DC 20375 USA.
[Doi, A.] JAXA, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan.
[Lee, N. P.] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA.
RP Giroletti, M (reprint author), INAF Ist Radioastron, Via Gobetti 101, I-40129 Bologna, Italy.
EM giroletti@ira.inaf.it
OI Cesarini, Andrea/0000-0002-8611-8610; Giovannini,
Gabriele/0000-0003-4916-6362; Giroletti, Marcello/0000-0002-8657-8852
FU European Union [RI-261525]; national research councils
FX We thank D. E. Harris for reading the manuscript. We acknowledge a
contribution from the Italian Foreign Affair Minister under the
bilateral scientific collaboration between Italy and Japan. e-VLBI
research infrastructure in Europe is supported by the European Union's
Seventh Framework Programme (FP7/2007-2013) under grant agreement no.
RI-261525 NEXPReS. The European VLBI Network is a joint facility of
European, Chinese, South African and other radio astronomy institutes
funded by their national research councils. The National Radio Astronomy
Observatory is a facility of the National Science Foundation operated
under cooperative agreement by AUI.
NR 25
TC 21
Z9 21
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 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD FEB
PY 2012
VL 538
AR L10
DI 10.1051/0004-6361/201218794
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 897AX
UT WOS:000300614100163
ER
PT J
AU Garfinkel, S
AF Garfinkel, Simson
TI Digital forensics XML and the DFXML toolset
SO DIGITAL INVESTIGATION
LA English
DT Article
DE Digital forensics xml; DFXML; Forensic tools; Forensic tool validation;
Forensic automation
AB Digital Forensics XML (DFXML) is an XML language that enables the exchange of structured forensic information. DFXML can represent the provenance of data subject to forensic investigation, document the presence and location of file systems, files, Microsoft Windows Registry entries, JPEG EXIFs, and other technical information of interest to the forensic analyst. DFXML can also document the specific tools and processing techniques that were used to produce the results, making it possible to automatically reprocess forensic information as tools are improved.
This article presents the motivation, design, and use of DFXML. It also discusses tools that have been creased that both ingest and emit DFXML files. Published by Elsevier Ltd.
C1 USN, Postgrad Sch, Arlington, VA 22203 USA.
RP Garfinkel, S (reprint author), USN, Postgrad Sch, 900 N Glebe, Arlington, VA 22203 USA.
EM slgarfin@nps.edu
FU NSF [DUE-0919593]
FX George Dinolt, Kevin Fairbanks, Christophe Grenier, Joshua Gross, Jesse
Kornblum, Neal Krawetz, Alex Nelson, Adam Russell, Elisabeth Rosenberg,
John Wulff, Tony Zuccaro and the anonymous reviewers all provided useful
feedback and criticism regarding the design of DFXML. Portions of this
work were funded by NSF Award DUE-0919593.
NR 47
TC 20
Z9 20
U1 0
U2 4
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1742-2876
J9 DIGIT INVEST
JI Digit. Investig.
PD FEB
PY 2012
VL 8
IS 3-4
BP 161
EP 174
DI 10.1016/j.diin.2011.11.002
PG 14
WC Computer Science, Information Systems; Computer Science,
Interdisciplinary Applications
SC Computer Science
GA 903PS
UT WOS:000301131100003
ER
PT J
AU Ziegeler, SB
Dykes, JD
Shriver, JF
AF Ziegeler, Sean B.
Dykes, James D.
Shriver, Jay F.
TI Spatial Error Metrics for Oceanographic Model Verification
SO JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY
LA English
DT Article
ID FORECAST VERIFICATION; PRECIPITATION FORECASTS; IMAGE REGISTRATION;
OPTICAL-FLOW; COEFFICIENTS; FIELDS
AB A common problem with modern numerical oceanographic models is spatial displacement, including misplacement and misshapenness of ocean circulation features. Traditional error metrics, such as least squares methods, are ineffective in many such cases; for example, only small errors in the location of a frontal pattern are translated to large differences in least squares of intensities. Such problems are common in meteorological forecast verification as well, so the application of spatial error metrics have been a recently popular topic there. Spatial error metrics separate model error into a displacement component and an intensity component, providing a more reliable assessment of model biases and a more descriptive portrayal of numerical model prediction skill. The application of spatial error metrics to oceanographic models has been sparse, and further advances for both meteorology and oceanography exist in the medical imaging field. These advances are presented, along with modifications necessary for oceanographic model output. Standard methods and options for those methods in the literature are explored, and where the best arrangements of options are unclear, comparison studies are conducted. These trials require the reproduction of synthetic displacements in conjunction with synthetic intensity perturbations across 480 Navy Coastal Ocean Model (NCOM) temperature fields from various regions of the globe throughout 2009. Study results revealed the success of certain approaches novel to both meteorology and oceanography, including B-spline transforms and mutual information. That, combined with other common methods, such as quasi-Newton optimization and land masking, could best recover the synthetic displacements under various synthetic intensity changes.
C1 [Ziegeler, Sean B.] High Performance Technol Inc, Reston, VA 20190 USA.
[Dykes, James D.; Shriver, Jay F.] Naval Res Lab, Stennis Space Ctr, MS USA.
RP Ziegeler, SB (reprint author), High Performance Technol Inc, 11955 Freedom Dr,Suite 1100, Reston, VA 20190 USA.
EM sziegeler@hpti.com
NR 24
TC 4
Z9 4
U1 0
U2 6
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0739-0572
EI 1520-0426
J9 J ATMOS OCEAN TECH
JI J. Atmos. Ocean. Technol.
PD FEB
PY 2012
VL 29
IS 2
BP 260
EP 266
DI 10.1175/JTECH-D-11-00109.1
PG 7
WC Engineering, Ocean; Meteorology & Atmospheric Sciences
SC Engineering; Meteorology & Atmospheric Sciences
GA 893WW
UT WOS:000300389400009
ER
PT J
AU Metzler, AM
Siegmann, WL
Collins, MD
AF Metzler, Adam M.
Siegmann, William L.
Collins, Michael D.
TI Single-scattering parabolic equation solutions for elastic media
propagation, including Rayleigh waves
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID SLOPING INTERFACES; OCEAN; APPROXIMATIONS; STONELEY; BOTTOM; GUIDES
AB The parabolic equation method with a single-scattering correction allows for accurate modeling of range-dependent environments in elastic layered media. For problems with large contrasts, accuracy and efficiency are gained by subdividing vertical interfaces into a series of two or more single-scattering problems. This approach generates several computational parameters, such as the number of interface slices, an iteration convergence parameter tau, and the number of iterations n for convergence. Using a narrow-angle approximation, the choices of n = 1 and tau = 2 give accurate solutions. Analogous results from the narrow-angle approximation extend to environments with larger variations when slices are used as needed at vertical interfaces. The approach is applied to a generic ocean waveguide that includes the generation of a Rayleigh interface wave. Results are presented in both frequency and time domains. (C) 2012 Acoustical Society of America. [DOI: 10.1121/1.3675554]
C1 [Metzler, Adam M.; Siegmann, William L.] Rensselaer Polytech Inst, Troy, NY 12180 USA.
[Collins, Michael D.] USN, Res Lab, Stennis Space Ctr, MS 39522 USA.
RP Metzler, AM (reprint author), Univ Texas Austin, Appl Res Labs, Austin, TX 78758 USA.
EM adzler514@gmail.com
FU Office of Naval Research
FX Work supported by the Office of Naval Research. The work of A. M. M. was
supported by the Office of Naval Research through an Ocean Acoustics
Graduate Traineeship Award.
NR 23
TC 3
Z9 3
U1 0
U2 2
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 FEB
PY 2012
VL 131
IS 2
BP 1131
EP 1137
DI 10.1121/1.3675554
PN 1
PG 7
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 895ID
UT WOS:000300488800033
PM 22352488
ER
PT J
AU Foote, KG
Hastings, MC
Ketten, DR
Lin, YT
Reidenberg, JS
Rye, K
AF Foote, Kenneth G.
Hastings, Mardi C.
Ketten, Darlene R.
Lin, Ying-Tsong
Reidenberg, Joy S.
Rye, Kent
TI Sonar-induced pressure fields in a post-mortem common dolphin
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID MARINE MAMMALS; BEAKED-WHALES; BUBBLE-GROWTH; SOUND; CETACEANS; GAS
AB Potential physical effects of sonar transmissions on marine mammals were investigated by measuring pressure fields induced in a 119-kg, 211-cm-long, young adult male common dolphin (Delphinus delphis) cadaver. The specimen was instrumented with tourmaline acoustic pressure gauges used as receiving sensors. Gauge implantation near critical tissues was guided by intraoperative, high-resolution, computerized tomography (CT) scanning. Instrumented structures included the melon, nares, ear, thoracic wall, lungs, epaxial muscle, and lower abdomen. The specimen was suspended from a frame equipped with a standard 50.8-mm-diameter spherical transducer used as the acoustic source and additional receiving sensors to monitor the transmitted and external, scattered field. Following immersion, the transducer transmitted pulsed sinusoidal signals at 5, 7, and 10 kHz. Quantitative internal pressure fields are reported for all cases except those in which the gauge failed or no received signal was detected. A full necropsy was performed immediately after the experiment to examine instrumented areas and all major organs. No lesions attributable to acoustic transmissions were found, consistent with the low source level and source-receiver distances. (C) 2012 Acoustical Society of America. [DOI: 10.11211.3675005]
C1 [Foote, Kenneth G.; Ketten, Darlene R.] Woods Hole Oceanog Inst, Dept Biol, Woods Hole, MA 02543 USA.
[Hastings, Mardi C.] Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA.
[Reidenberg, Joy S.] Mt Sinai Sch Med, Ctr Anat & Funct Morphol, New York, NY 10029 USA.
[Rye, Kent] Naval Surface Warfare Ctr, Dept Navy, Carderock Div, Bethesda, MD 20817 USA.
[Ketten, Darlene R.] Harvard Univ, Sch Med, Dept Otol & Laryngol, Boston, MA 02114 USA.
RP Foote, KG (reprint author), Woods Hole Oceanog Inst, Dept Biol, Woods Hole, MA 02543 USA.
EM kfoote@whoi.edu
OI Reidenberg, Joy/0000-0002-4180-7156
FU NOPP through ONR [N000140710992]; ONR [N000140811231]
FX The contributions of J. A. Clark, deceased, are gratefully acknowledged.
W. H. Lewis and other colleagues at NSWC are thanked for participating
in the experiment. J. Arruda and S. Cramer are thanked for diverse
contributions. M. Parmenter is thanked for editorial assistance. Work
supported by NOPP through ONR Grant No. N000140710992. Work at CSI
additionally supported by ONR Grant No. N000140811231.
NR 38
TC 0
Z9 0
U1 2
U2 26
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 FEB
PY 2012
VL 131
IS 2
BP 1595
EP 1604
DI 10.1121/1.3675005
PN 1
PG 10
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 895ID
UT WOS:000300488800074
PM 22352529
ER
PT J
AU Branstetter, BK
Moore, PW
Finneran, JJ
Tormey, MN
Aihara, H
AF Branstetter, Brian K.
Moore, Patrick W.
Finneran, James J.
Tormey, Megan N.
Aihara, Hitomi
TI Directional properties of bottlenose dolphin (Tursiops truncatus)
clicks, burst-pulse, and whistle sounds
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID TRANSMISSION BEAM PATTERN; WHALE PSEUDORCA-CRASSIDENS; ECHOLOCATION
SIGNALS; LAGENORHYNCHUS-ALBIROSTRIS; STENELLA-LONGIROSTRIS;
SOCIAL-ORGANIZATION; SONAR SIGNAL; PROPAGATION; MOVEMENT; SPINNER
AB The directional properties of bottlenose dolphin clicks, burst-pulse, and whistle signals were measured using a five element array, at horizontal angles of 0 degrees, 45 degrees, 90 degrees, 135 degrees, and 180 degrees relative to a dolphin stationed on an underwater biteplate. Clicks and burst-pulse signals were highly directional with directivity indices of similar to 11 dB for both signal types. Higher frequencies and higher amplitudes dominated the forward, on-axis sound field. A similar result was found with whistles, where higher frequency harmonics had greater directivity indices than lower frequency harmonics. The results suggest the directional properties of these signals not only provide enhanced information to the sound producer (as in echolocation) but can provide valuable information to conspecific listeners during group coordination and socialization. (C) 2012 Acoustical Society of America. [DOI: 10.1121/1.3676694]
C1 [Branstetter, Brian K.; Moore, Patrick W.] Natl Marine Mammal Fdn, San Diego, CA 92106 USA.
[Finneran, James J.] USN, Marine Mammal Program, San Diego, CA 92152 USA.
[Tormey, Megan N.; Aihara, Hitomi] G2 Software Syst Inc, San Diego, CA 92110 USA.
RP Branstetter, BK (reprint author), Natl Marine Mammal Fdn, 2240 Shelter Isl Dr,204, San Diego, CA 92106 USA.
EM brian.branstetter@nmmpfoundation.org
FU Office of Naval Research; U.S. Navy
FX We thank Victoria Bowman and the trainers and interns at the U.S. Navy
Marine Mammal Program for their support. We thank an anonymous reviewer
for their helpful comments and suggestions. We also acknowledge the
dolphin HEP (also known as Heptuna and Tt018) for his 40+ years
contributing to our understanding of dolphin bioacoustics. This work was
supported by the Office of Naval Research.
NR 41
TC 18
Z9 18
U1 2
U2 51
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 FEB
PY 2012
VL 131
IS 2
BP 1613
EP 1621
DI 10.1121/1.3676694
PN 1
PG 9
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 895ID
UT WOS:000300488800076
PM 22352531
ER
PT J
AU Buckhout-White, S
Ancona, M
Oh, E
Deschamps, JR
Stewart, MH
Blanco-Canosa, JB
Dawson, PE
Goldman, ER
Medintz, IL
AF Buckhout-White, Susan
Ancona, Mario
Oh, Eunkeu
Deschamps, Jeffrey R.
Stewart, Michael H.
Blanco-Canosa, Juan B.
Dawson, Philip E.
Goldman, Ellen R.
Medintz, Igor L.
TI Multimodal Characterization of a Linear DNA-Based Nanostructure
SO ACS NANO
LA English
DT Article
DE DNA; AFM; TEM; voltammetry; FRET; DLS; characterization; gold
nanoparticles; fluorophore; Os-bipy; semiconductor; metrology; quantum
dot; electrophoresis; modeling
ID RESONANCE ENERGY-TRANSFER; SINGLE-STRANDED-DNA; GOLD NANOPARTICLES;
QUANTUM DOTS; ELECTRON-MICROSCOPY; PERSISTENCE LENGTH; NUCLEIC-ACIDS;
PROTEIN; ORIGAMI; ARRAYS
AB Designer DNA structures have garnered much interest as a way of assembling novel nanoscale architectures with exquisite control over the positioning of discrete molecules or nanoparticles. Exploiting this potential for a variety of applications such as light-harvesting, molecular electronics, or biosensing is contingent on the degree to which various nanoarchitectures with desired molecular functionalizations can be realized, and this depends critically on characterization. Many techniques exist for analyzing DNA-organized nanostructures; however, these are almost never used in concert because of overlapping concerns about their differing character, measurement environments, and the disparity in DNA modification chemistries and probe structure or size. To assess these concerns and to see what might be gleaned from a multimodal characterization, we Intensively study a single DNA nanostructure using a multiplicity of methods. Our test bed is a linear 100 base-pair double-stranded DNA that has been modified by a variety of chemical handles, dyes, semiconductor quantum dots, gold nanoparticles, and electroactive labels. To this we apply a combination of physical/optical characterization methods Including electrophoresis, atomic force microscopy, transmission electron microscopy, dynamic light scattering, Forster resonance energy transfer, voltammetry, and structural modeling. In general, the results indicate that the differences among the techniques are not so large as to prevent their effective use in combination, that the data tend to be corroborative, and that differences observed among them can actually be quite informative.
C1 [Buckhout-White, Susan; Deschamps, Jeffrey R.; Goldman, Ellen R.; Medintz, Igor L.] USN, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC 20375 USA.
[Oh, Eunkeu; Stewart, Michael H.] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
[Ancona, Mario] USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
[Buckhout-White, Susan] George Mason Univ, Manassas, VA 20110 USA.
[Blanco-Canosa, Juan B.; Dawson, Philip E.] Scripps Res Inst, Dept Cell Biol, La Jolla, CA 92037 USA.
[Blanco-Canosa, Juan B.; Dawson, Philip E.] Scripps Res Inst, Dept Chem, La Jolla, CA 92037 USA.
[Oh, Eunkeu] Sotera Def Solut, Crofton, MD 21114 USA.
RP Medintz, IL (reprint author), USN, Res Lab, Ctr Bio Mol Sci & Engn, Code 6900, Washington, DC 20375 USA.
EM Igor.medintz@nrl.navy.mil
OI Deschamps, Jeffrey/0000-0001-5845-0010
FU ONR; NRL; NRL-NSI; DTRA; DARPA
FX The authors thank M. Twigg and S. Trammel for assistance with the TEM
imaging and the electrochemistry measurements and acknowledge ONR, NRL,
NRL-NSI, DTRA, and DARPA for financial support.
NR 61
TC 17
Z9 17
U1 4
U2 71
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
J9 ACS NANO
JI ACS Nano
PD FEB
PY 2012
VL 6
IS 2
BP 1026
EP 1043
DI 10.1021/nn204680r
PG 18
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
Nanotechnology; Materials Science, Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 898QW
UT WOS:000300757900006
PM 22257317
ER
PT J
AU Palmsten, ML
Holman, RA
AF Palmsten, Margaret L.
Holman, Robert A.
TI Laboratory investigation of dune erosion using stereo video
SO COASTAL ENGINEERING
LA English
DT Article
DE Stereo imaging; Dune erosion; Wave runup; Remote sensing
ID SCALE; IMPACT; RUNUP; COAST
AB Simple parameterizations of dune erosion are necessary for forecasting erosion potential prior to an oncoming storm. Dune erosion may be parameterized in terms of the elevation of the total water level (composed of surge, tide, and wave runup) above the dune base and period of exposure of the dune to waves. In this work, we test several versions of this model using observations from a large wave tank experiment designed to model a storm hydrograph, and we develop a new method for acquiring the appropriate data with confidence intervals using stereo video techniques.
The stereo method results in observations of dune morphology at higher spatial and temporal resolutions than traditional survey methods allow. Resolution of the stereo technique was 0.1 m in the horizontal and 0.04 m in the vertical, and errors in stereo observations were on the order of 0.02 to 0.08 m (1 to 2 pixels) when compared with surveys. A new method was developed to estimate confidence intervals on stereo observations. When the unchanging dune top was repeatedly sampled, the new confidence intervals encompassed 2 standard deviations of scatter about the mean dune surface 98% of the time.
Observations from the stereo method were used to quantify wave runup and dune erosion. We tested a variety of runup statistics based on a Gaussian distribution of swash properties, and found that the most predictive statistic for dune erosion was the 16% exceedance elevation above the dune base, lower than the often used 2% exceedance value. We found that the parameterization of runup was sensitive to the definition of beach slope and that the most accurate beach slope for predicting runup was through the region of the beach profile defined by the mean water level plus one standard deviation of swash. The dune base retreated along a relatively constant trajectory that was a half of the initial beach slope. Finally, a simple model for dune erosion was tested and found to reproduce 64% of the observed variance in dune erosion rate given known forcing at the dune and 49% of the observed variance in dune erosion rate given parameterized forcing. Integrating the simple model over time, 93% of the observed dune retreat distance was reproduced given offshore forcing. (C) 2011 Elsevier B.V. All rights reserved.
C1 [Palmsten, Margaret L.] USN, Res Lab, Stennis Space Ctr, Stennis Space Ctr, MS 39529 USA.
[Palmsten, Margaret L.; Holman, Robert A.] Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
RP Palmsten, ML (reprint author), USN, Res Lab, Stennis Space Ctr, Code 7430, Stennis Space Ctr, MS 39529 USA.
EM margaret.palmsten.ctr@nrlssc.navy.mil
FU Oregon Sea Grant; United States Geological Survey; Office of Naval
Research
FX The authors would like to thank Linden Clarke for early development of
the stereo code, John Stanley for his hard work on this and other Argus
projects, and Peter Ruggiero and Tim Maddux for data collection and
project development. This work was completed with funding from the
Oregon Sea Grant, the United States Geological Survey, and the Office of
Naval Research.
NR 28
TC 11
Z9 15
U1 1
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3839
J9 COAST ENG
JI Coast. Eng.
PD FEB
PY 2012
VL 60
BP 123
EP 135
DI 10.1016/j.coastaleng.2011.09.003
PG 13
WC Engineering, Civil; Engineering, Ocean
SC Engineering
GA 900WF
UT WOS:000300921700011
ER
PT J
AU Kawai, F
Paek, S
Choi, KJ
Prouty, M
Kanipes, MI
Guerry, P
Yeo, HJ
AF Kawai, Fumihiro
Paek, Seonghee
Choi, Kyoung-Jae
Prouty, Michael
Kanipes, Margaret I.
Guerry, Patricia
Yeo, Hye-Jeong
TI Crystal structure of JlpA, a surface-exposed lipoprotein adhesin of
Campylobacter jejuni
SO JOURNAL OF STRUCTURAL BIOLOGY
LA English
DT Article
DE Crystal structure; Bacterial lipoprotein; JlpA; Campylobacter jejuni
ID OUTER-MEMBRANE PROTEIN; EPITHELIAL-CELLS; DENSITY MODIFICATION;
COLONIZATION; REFINEMENT; MODEL; PATHOGENESIS; ASSOCIATION; ACTIVATION;
ADHERENCE
AB The Campylobacter jejuni JlpA protein is a surface-exposed lipoprotein that was discovered as an adhesin promoting interaction with host epithelium cells, an early critical step in the pathogenesis of C. jejuni disease. Increasing evidence ascertained that JlpA is antigenic, indicating a role of JlpA in immune response during the infectious process. Here, we report the crystal structure of JlpA at 2.7 angstrom resolution, revealing a catcher's mitt shaped unclosed half p-barrel. Although the apparent architecture of JlpA is somewhat reminiscent of other bacterial lipoproteins such as LolB, the topology of JlpA is unique among the bacterial surface proteins reported to date and therefore JlpA represents a novel bacterial cell surface lipoprotein. The concave face of the structure results in an unusually large hydrophobic basin with a localized acidic pocket, suggesting a possibility that JlpA may accommodate multiple ligands. Therefore, the structure provides framework for determining the molecular function of JlpA and new strategies for the rational design of small molecule inhibitors efficiently targeting JlpA. (C) 2012 Elsevier Inc. All rights reserved.
C1 [Kawai, Fumihiro; Paek, Seonghee; Choi, Kyoung-Jae; Yeo, Hye-Jeong] Univ Houston, Dept Biol & Biochem, Houston, TX 77204 USA.
[Prouty, Michael; Guerry, Patricia] USN, Enter Dis Dept, Med Res Ctr, Silver Spring, MD 20910 USA.
[Kanipes, Margaret I.] N Carolina Agr & Tech Univ, Dept Chem, Greensboro, NC 27411 USA.
RP Yeo, HJ (reprint author), Univ Houston, Dept Biol & Biochem, Houston, TX 77204 USA.
EM hyeo@uh.edu
RI Guerry, Patricia/A-8024-2011
FU US Department of Energy, Office of Biological and Environmental Research
[DE-AC02-06CH11357]; NIH [AI068943]; Welch Foundation [E-1616]; Military
Infectious Disease Research Program Work Unit [6000.RAD1. DA3.A0308]
FX We thank Stephen J. Savarino for the gift of recombinant LTB and Lanfong
Lee for providing wildtype JlpA for assay development. Results shown in
this report are derived from work performed at Argonne National
Laboratory, Structural Biology Center (19ID) at the Advanced Photon
Source. Argonne is operated by UChicago Argonne, LLC, for the US
Department of Energy, Office of Biological and Environmental Research
under contract DE-AC02-06CH11357. This work was supported in part by NIH
Grant AI068943 and Grant E-1616 from the Welch Foundation to H.-J.Y. and
by the Military Infectious Disease Research Program Work Unit 6000.RAD1.
DA3.A0308 to P.G. M.P. is a military service member and P.G. is a
civilian employee of the US government. This work was prepared as part
of their official duties. Title 17 USC 105 provides that 'Copyright
protection under this title is not available for any work of the US
government. Title 127 USC 101 defines a US government work as a work
prepared by a military service member or employee of the US government
as part of that person's official duties.
NR 30
TC 6
Z9 6
U1 0
U2 8
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 FEB
PY 2012
VL 177
IS 2
BP 583
EP 588
DI 10.1016/j.jsb.2012.01.001
PG 6
WC Biochemistry & Molecular Biology; Biophysics; Cell Biology
SC Biochemistry & Molecular Biology; Biophysics; Cell Biology
GA 898PX
UT WOS:000300755400046
PM 22245776
ER
PT J
AU Sanghera, J
Kim, W
Villalobos, G
Shaw, B
Baker, C
Frantz, J
Sadowski, B
Aggarwal, I
AF Sanghera, Jasbinder
Kim, Woohong
Villalobos, Guillermo
Shaw, Brandon
Baker, Colin
Frantz, Jesse
Sadowski, Bryan
Aggarwal, Ishwar
TI Ceramic Laser Materials
SO MATERIALS
LA English
DT Review
DE ceramics; laser materials; 100 KW; microchip lasers; ultrashort pulse;
ceramic composites; non-oxide ceramics
ID SOLID-STATE LASERS; DOPED YB-YAG; CRYSTALS; GENERATION; EFFICIENCY
AB Ceramic laser materials have come a long way since the first demonstration of lasing in 1964. Improvements in powder synthesis and ceramic sintering as well as novel ideas have led to notable achievements. These include the first Nd:yttrium aluminum garnet (YAG) ceramic laser in 1995, breaking the 1 KW mark in 2002 and then the remarkable demonstration of more than 100 KW output power from a YAG ceramic laser system in 2009. Additional developments have included highly doped microchip lasers, ultrashort pulse lasers, novel materials such as sesquioxides, fluoride ceramic lasers, selenide ceramic lasers in the 2 to 3 mu m region, composite ceramic lasers for better thermal management, and single crystal lasers derived from polycrystalline ceramics. This paper highlights some of these notable achievements.
C1 [Sanghera, Jasbinder; Kim, Woohong; Villalobos, Guillermo; Shaw, Brandon; Baker, Colin; Frantz, Jesse] USN, Res Lab, Washington, DC 20375 USA.
[Sadowski, Bryan; Aggarwal, Ishwar] Sotera Def Solut, Crofton, MD 21114 USA.
RP Sanghera, J (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM jas.sanghera@nrl.navy.mil; rick.kim@nrl.navy.mil;
guillermo.villalobos@nrl.navy.mil; brandon.shaw@nrl.navy.mil;
colin.baker@nrl.navy.mil; jesse.frantz@nrl.navy.mil;
bryan.sadowski.ctr@nrl.navy.mil; ishaggar@nrl.navy.mil
RI Baker, Colin/I-6657-2015
NR 43
TC 54
Z9 56
U1 6
U2 56
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 1996-1944
J9 MATERIALS
JI Materials
PD FEB
PY 2012
VL 5
IS 2
BP 258
EP 277
DI 10.3390/ma5020258
PG 20
WC Materials Science, Multidisciplinary
SC Materials Science
GA 898FT
UT WOS:000300724000005
ER
PT J
AU Hopkins, PE
Baraket, M
Barnat, EV
Beechem, TE
Kearney, SP
Duda, JC
Robinson, JT
Walton, SG
AF Hopkins, Patrick E.
Baraket, Mira
Barnat, Edward V.
Beechem, Thomas E.
Kearney, Sean P.
Duda, John C.
Robinson, Jeremy T.
Walton, Scott G.
TI Manipulating Thermal Conductance at Metal-Graphene Contacts via Chemical
Functionalization
SO NANO LETTERS
LA English
DT Article
DE Graphene; thermal boundary conductance; chemical functionalization;
adsorbates; bond strength; Raman spectroscopy; X-ray photoelectron
spectroscopy; time domain thermoreflectance; sp(3) bonding
ID LAYER GRAPHENE; TRANSPORT; CONDUCTIVITY; GRAPHITE; DIAMOND; FILMS
AB Graphene-based devices have garnered tremendous attention due to the unique physical properties arising from this purely two-dimensional carbon sheet leading to tremendous efficiency in the transport of thermal carriers (i.e., phonons). However, it is necessary for this two-dimensional material to be able to efficiently transport heat into the surrounding 3D device architecture in order to fully capitalize on its intrinsic transport capabilities. Therefore, the thermal boundary conductance at graphene interfaces is a critical parameter in the realization of graphene electronics and thermal solutions. In this work, we examine the role of chemical functionalization on the thermal boundary conductance across metal/graphene interfaces. Specifically, we metalize graphene that has been plasma functionalized and then measure the thermal boundary conductance at Al/graphene/SiO2 contacts with time domain thermoreflectance. The addition of adsorbates to the graphene surfaces are shown to influence the cross plane thermal conductance; this behavior is attributed to changes in the bonding between the metal and the graphene, as both the phonon flux and the vibrational mismatch between the materials are each subject to the interfacial bond strength. These results demonstrate plasma-based functionalization of graphene surfaces is a viable approach to manipulate the thermal boundary conductance.
C1 [Hopkins, Patrick E.; Duda, John C.] Univ Virginia, Dept Mech & Aerosp Engn, Charlottesville, VA 22904 USA.
[Barnat, Edward V.; Beechem, Thomas E.; Kearney, Sean P.; Duda, John C.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
[Baraket, Mira; Walton, Scott G.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Robinson, Jeremy T.] USN, Res Lab, Elect Sci & Technol Div, Washington, DC 20375 USA.
RP Hopkins, PE (reprint author), Univ Virginia, Dept Mech & Aerosp Engn, Charlottesville, VA 22904 USA.
EM phopkins@virginia.edu; scott.walton@nrl.navy.mil
RI Robinson, Jeremy/F-2748-2010; Duda, John/A-7214-2011
FU National Science Foundation [CBET-1134311]; Sandia National
Laboratories; National Research Council; Office of Naval Research; U.S.
Department of Energy's National Nuclear Security Administration
[DE-AC04-94AL85000]
FX P.E.H. is grateful for funding from the National Science Foundation
(CBET-1134311). P.E.H., T.E.B., and J.C.D. gratefully acknowledge
support from the LDRD Program through Sandia National Laboratories. M.B.
appreciates the support of the National Research Council. This work was
partially supported by the Office of Naval Research. J.C.D. gratefully
acknowledges support from the National Science Foundation through the
Graduate Research Fellowship Program. This work was performed, in part,
at the Center for Integrated Nanotechnologies, a U.S. Department of
Energy, Office of Basic Energy Sciences user facility. Sandia National
Laboratories is a multiprogram laboratory managed and operated by Sandia
Corporation, a wholly owned subsidiary of Lockheed Martin Corporation,
for the U.S. Department of Energy's National Nuclear Security
Administration under Contract DE-AC04-94AL85000.
NR 46
TC 90
Z9 90
U1 5
U2 119
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 FEB
PY 2012
VL 12
IS 2
BP 590
EP 595
DI 10.1021/nl203060j
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 887XW
UT WOS:000299967800011
PM 22214512
ER
PT J
AU Liu, X
Metcalf, TH
Robinson, JT
Houston, BH
Scarpa, F
AF Liu, Xiao
Metcalf, Thomas H.
Robinson, Jeremy T.
Houston, Brian H.
Scarpa, Fabrizio
TI Shear Modulus of Monolayer Graphene Prepared by Chemical Vapor
Deposition
SO NANO LETTERS
LA English
DT Article
DE graphene; shear modulus; internal friction; chemical vapor deposition;
carbon; nanomechanics
ID ELASTIC PROPERTIES; MECHANICAL-PROPERTIES; RESONATORS; SHEETS; FILMS;
OXIDE; TEMPERATURE
AB We report shear modulus (G) and internal friction (Q(-1)) measurements of large-area monolayer graphene films grown by chemical vapor deposition on copper foil and transferred onto high-Q silicon mechanical oscillators. The shear modulus, extracted from a resonance frequency shift at 0.4 K where the apparatus is most sensitive, averages 280 GPa. This is five times larger than those of the multilayered graphene-based films measured previously. The internal friction is unmeasurable within the sensitivity of our experiment and thus bounded above by Q(-1) <= 3 X 10(-5), which is orders-of-magnitude smaller than that of multilayered graphene-based films. Neither annealing nor interface modification has a measurable effect on G or Q(-1). Our results on G are consistent with recent theoretical evaluations and simulations carried out in this work, showing that the shear restoring force transitions from interlayer to intralayer interactions as the film thickness approaches one monolayer.
C1 [Liu, Xiao; Metcalf, Thomas H.; Robinson, Jeremy T.; Houston, Brian H.] USN, Res Lab, Washington, DC 20375 USA.
[Scarpa, Fabrizio] Univ Bristol, Bristol Ctr Nanosci & Quantum Informat, Bristol BS8 1FD, Avon, England.
[Scarpa, Fabrizio] Univ Bristol, ACCIS, Bristol BS8 1TR, Avon, England.
RP Liu, X (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM xiao.liu@nrl.navy.mil
RI Robinson, Jeremy/F-2748-2010; Scarpa, Fabrizio/B-9465-2008
OI Scarpa, Fabrizio/0000-0002-5470-4834
FU Office of Naval Research
FX This work was supported by the Office of Naval Research. We thank Dr.
Keith Perkins for his support in the material fabrication and annealing.
NR 33
TC 39
Z9 39
U1 1
U2 63
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 FEB
PY 2012
VL 12
IS 2
BP 1013
EP 1017
DI 10.1021/nl204196v
PG 5
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 887XW
UT WOS:000299967800081
PM 22214257
ER
PT J
AU Hamlington, PE
Krasnov, D
Boeck, T
Schumacher, J
AF Hamlington, Peter E.
Krasnov, Dmitry
Boeck, Thomas
Schumacher, Joerg
TI Statistics of the energy dissipation rate and local enstrophy in
turbulent channel flow
SO PHYSICA D-NONLINEAR PHENOMENA
LA English
DT Article
DE Turbulent channel flows; Turbulent shear flows; Energy dissipation rate;
Enstrophy
ID DIRECT NUMERICAL-SIMULATION; LOW-REYNOLDS-NUMBER; BOUNDARY-LAYER;
ISOTROPIC TURBULENCE; MECHANISMS; VORTICITY
AB Using high-resolution direct numerical simulations, the height and Reynolds number dependence of highorder statistics of the energy dissipation rate and local enstrophy are examined in incompressible, fully developed turbulent channel flow. The statistics are studied over a range of wall distances, spanning the viscous sublayer to the channel flow centerline, for friction Reynolds numbers Re-tau = 180 and Re-tau = 381. The high resolution of the simulations allows dissipation and enstrophy moments up to fourth order to be calculated. These moments show a dependence on wall distance, and Reynolds number effects are observed at the edge of the logarithmic layer. Conditional analyses based on locations of intense rotation are also carried out in order to determine the contribution of vortical structures to the dissipation and enstrophy moments. Our analysis shows that, for the simulation at the larger Reynolds number, smallscale fluctuations of both dissipation and enstrophy show relatively small variations for z(+) greater than or similar to 100. (C) 2011 Elsevier B.V. All rights reserved.
C1 [Hamlington, Peter E.] USN, Res Lab, Lab Computat Phys & Fluid Dynam, Washington, DC 20375 USA.
[Krasnov, Dmitry; Boeck, Thomas; Schumacher, Joerg] Ilmenau Univ Technol, Inst Thermodynam & Fluid Mech, D-98684 Ilmenau, Germany.
RP Hamlington, PE (reprint author), USN, Res Lab, Lab Computat Phys & Fluid Dynam, Washington, DC 20375 USA.
EM peterh@lcp.nrl.navy.mil
RI Boeck, Thomas/C-2188-2017
OI Boeck, Thomas/0000-0002-0814-7432
FU DEISA Consortium through EU [RI-031513, RI-222919]; National Research
Council; Emmy-Noether-Program; Deutsche Forschungsgemeinschaft (DFG);
German-Israeli-Foundation [1072-6.14/2009]
FX We thank the DEISA Consortium (www.deisa.eu), co-funded through the EU
FP6 project RI-031513 and the FP7 project RI-222919, for support within
the DEISA Extreme Computing Initiative. The computations were carried
out on the Cray XT4 Cluster Hector at EPCC in Edinburgh. We wish to
thank Florian Janetzko for assistance with the parallel input/output
routines. PEH was supported by a National Research Council Research
Associateship Award at the Naval Research Laboratory. DK and TB were
supported by the Emmy-Noether-Program and JS was supported by the
Heisenberg Program of the Deutsche Forschungsgemeinschaft (DFG). JS
acknowledges partial support by the German-Israeli-Foundation under
Grant 1072-6.14/2009.
NR 31
TC 8
Z9 8
U1 3
U2 19
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-2789
EI 1872-8022
J9 PHYSICA D
JI Physica D
PD FEB 1
PY 2012
VL 241
IS 3
SI SI
BP 169
EP 177
DI 10.1016/j.physd.2011.06.012
PG 9
WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical
SC Mathematics; Physics
GA 899LA
UT WOS:000300816200006
ER
PT J
AU Arya, R
Dossantos, F
Ohman-Strickland, P
Merlin, MA
AF Arya, Rajiv
Dossantos, Frank
Ohman-Strickland, Pamela
Merlin, Mark A.
TI Impact of trauma activation on the ED length of stay for nontraumatic
patients
SO AMERICAN JOURNAL OF EMERGENCY MEDICINE
LA English
DT Article
ID MYOCARDIAL-INFARCTION; CARE
AB Introduction: Trauma activation prioritizes hospital resources for the assessment and treatment of trauma patient over all patients in the emergency department (ED). We hypothesized that length of stay (LOS) is longer for nontrauma patients during a trauma activation.
Methods: A retrospective, case-control chart review was conducted in a level I trauma center. Cases consist of patients who present 1 hour before and after the presentation of the trauma activation. Controls were patients presenting to the ED during the same period exactly 1 week before and after the cases. Confounding variables measured included sex, age, arrivals, and census for the 3 areas.
Results: Two hundred ninety-four trauma events occurred from January 1 until September 30, 2009. A significant difference was found between LOS of patients seen during a trauma activation with an average increase of 10.7 minutes in LOS (P = .0082; 95% confidence interval [CI], 2.8-18.7). This difference is attributable to the middle acuity area of the ED, in which the average increase in LOS was 20.3 minutes (P = .0004; 95% CI, 9.1-31.5). Significant LOS difference was not found when a trauma activation had an LOS of less than 60 minutes (P = .30; 95% CI, -7.1-61.7 for trauma LOS <60 minutes vs P = .02; 95% CI, 1.6-18.0 for trauma LOS >= 60 minutes).
Conclusion: This retrospective case-control chart review identified an increase in ED LOS for patient presenting during trauma activations. Resource prioritization should be accounted for during times when these critical patients enter the ED. (C) 2012 Elsevier Inc. All rights reserved.
C1 [Arya, Rajiv; Merlin, Mark A.] UMDNJ Robert Wood Johnson Med Sch, Dept Emergency Med, New Brunswick, NJ 08901 USA.
[Dossantos, Frank] USN, Stennis Space Ctr, MS USA.
[Ohman-Strickland, Pamela] UMDNJ SPH, Dept Biostat, New Brunswick, NJ USA.
RP Arya, R (reprint author), UMDNJ Robert Wood Johnson Med Sch, Dept Emergency Med, New Brunswick, NJ 08901 USA.
EM rajiv.arya@rwjuh.edu
NR 9
TC 4
Z9 4
U1 0
U2 0
PU W B SAUNDERS CO-ELSEVIER INC
PI PHILADELPHIA
PA 1600 JOHN F KENNEDY BOULEVARD, STE 1800, PHILADELPHIA, PA 19103-2899 USA
SN 0735-6757
J9 AM J EMERG MED
JI Am. J. Emerg. Med.
PD FEB
PY 2012
VL 30
IS 2
BP 311
EP 316
DI 10.1016/j.ajem.2010.12.011
PG 6
WC Emergency Medicine
SC Emergency Medicine
GA 891SP
UT WOS:000300237200006
PM 21296528
ER
PT J
AU Chandrashekhar, MVS
Chowdhury, I
Kaminski, P
Kozlowski, R
Klein, PB
Sudarshan, T
AF Chandrashekhar, M. V. S.
Chowdhury, Iftekhar
Kaminski, Pavel
Kozlowski, Roman
Klein, P. B.
Sudarshan, Tangali
TI High Purity Semi-Insulating 4H-SiC Epitaxial Layers by
Defect-Competition Epitaxy: Controlling Si Vacancies
SO APPLIED PHYSICS EXPRESS
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION
AB Thick, high-purity semi-insulating (SI) homoepitaxial layers on 4H-SiC were demonstrated using a novel compensation scheme controlled by defect-competition epitaxy at C/Si ratios of 1.3-1.5. These showed resistivity of similar to 10(9) Omega cm. Comparison of secondary ion mass spectra between low-doped epilayers grown at C/Si ratio <1.3 and SI epilayers grown at C/Si ratio >1.3 showed little difference in residual impurity concentrations. A reconciliation of impurity concentration with measured resistivity indicated a compensating trap concentration of similar to 10(15) cm(-3) present only in SI epilayers. High-resolution photoinduced transient spectroscopy (HRPITS) identified them as Si vacancy related centers, with no detectable EH6/7 and Z(1/2) levels. Recombination lifetimes of similar to 5 ns suggest application in fast-switching power devices. (C) 2012 The Japan Society of Applied Physics
C1 [Chandrashekhar, M. V. S.; Chowdhury, Iftekhar; Sudarshan, Tangali] Univ S Carolina, Columbia, SC 29208 USA.
[Kaminski, Pavel; Kozlowski, Roman] Inst Elect Mat Technol, PL-01919 Warsaw, Poland.
[Klein, P. B.] USN, Res Lab, Washington, DC 20375 USA.
RP Chandrashekhar, MVS (reprint author), Univ S Carolina, Columbia, SC 29208 USA.
FU ONR [N000141010530]
FX The authors thank contract monitor Dr. H. Scott Coombe of ONR for his
support (Grant No. N000141010530) of this research, and Drs. Kurt
Gaskill and Rachael Myers-Ward at the Naval Research Laboratory for
their assistance with the SIMS measurements.
NR 22
TC 6
Z9 7
U1 2
U2 9
PU JAPAN SOC APPLIED PHYSICS
PI TOKYO
PA KUDAN-KITA BUILDING 5TH FLOOR, 1-12-3 KUDAN-KITA, CHIYODA-KU, TOKYO,
102-0073, JAPAN
SN 1882-0778
J9 APPL PHYS EXPRESS
JI Appl. Phys. Express
PD FEB
PY 2012
VL 5
IS 2
AR 025502
DI 10.1143/APEX.5.025502
PG 3
WC Physics, Applied
SC Physics
GA 897DV
UT WOS:000300624900038
ER
PT J
AU Ackermann, M
Ajello, M
Allafort, A
Atwood, WB
Baldini, L
Barbiellini, G
Bastieri, D
Bechtol, K
Bellazzini, R
Bhat, PN
Blandford, RD
Bonamente, E
Borgland, AW
Bregeon, J
Briggs, MS
Brigida, M
Bruel, P
Buehler, R
Burgess, JM
Buson, S
Caliandro, GA
Cameron, RA
Casandjian, JM
Cecchi, C
Charles, E
Chekhtman, A
Chiang, J
Ciprini, S
Claus, R
Cohen-Tanugi, J
Connaughton, V
Conrad, J
Cutini, S
Dennis, BR
de Palma, F
Dermer, CD
Digel, SW
Silva, EDE
Drell, PS
Drlica-Wagner, A
Dubois, R
Favuzzi, C
Fegan, SJ
Ferrara, EC
Fortin, P
Fukazawa, Y
Fusco, P
Gargano, F
Germani, S
Giglietto, N
Giordano, F
Giroletti, M
Glanzman, T
Godfrey, G
Grillo, L
Grove, JE
Gruber, D
Guiriec, S
Hadasch, D
Hayashida, M
Hays, E
Horan, D
Iafrate, G
Johannesson, G
Johnson, AS
Johnson, WN
Kamae, T
Kippen, RM
Knodlseder, J
Kuss, M
Lande, J
Latronico, L
Longo, F
Loparco, F
Lott, B
Lovellette, MN
Lubrano, P
Mazziotta, MN
McEnery, JE
Meegan, C
Mehault, J
Michelson, PF
Mitthumsiri, W
Monte, C
Monzani, ME
Morselli, A
Moskalenko, IV
Murgia, S
Murphy, R
Naumann-Godo, M
Nuss, E
Nymark, T
Ohno, M
Ohsugi, T
Okumura, A
Omodei, N
Orlando, E
Paciesas, WS
Panetta, JH
Parent, D
Pesce-Rollins, M
Petrosian, V
Pierbattista, M
Piron, F
Pivato, G
Poon, H
Porter, TA
Preece, R
Raino, S
Rando, R
Razzano, M
Razzaque, S
Reimer, A
Reimer, O
Ritz, S
Sbarra, C
Schwartz, RA
Sgro, C
Share, GH
Siskind, EJ
Spinelli, P
Takahashi, H
Tanaka, T
Tanaka, Y
Thayer, JB
Tibaldo, L
Tinivella, M
Tolbert, AK
Tosti, G
Troja, E
Uchiyama, Y
Usher, TL
Vandenbroucke, J
Vasileiou, V
Vianello, G
Vitale, V
von Kienlin, A
Waite, AP
Wilson-Hodge, C
Wood, DL
Wood, KS
Yang, Z
AF Ackermann, M.
Ajello, M.
Allafort, A.
Atwood, W. B.
Baldini, L.
Barbiellini, G.
Bastieri, D.
Bechtol, K.
Bellazzini, R.
Bhat, P. N.
Blandford, R. D.
Bonamente, E.
Borgland, A. W.
Bregeon, J.
Briggs, M. S.
Brigida, M.
Bruel, P.
Buehler, R.
Burgess, J. M.
Buson, S.
Caliandro, G. A.
Cameron, R. A.
Casandjian, J. M.
Cecchi, C.
Charles, E.
Chekhtman, A.
Chiang, J.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
Connaughton, V.
Conrad, J.
Cutini, S.
Dennis, B. R.
de Palma, F.
Dermer, C. D.
Digel, S. W.
do Couto e Silva, E.
Drell, P. S.
Drlica-Wagner, A.
Dubois, R.
Favuzzi, C.
Fegan, S. J.
Ferrara, E. C.
Fortin, P.
Fukazawa, Y.
Fusco, P.
Gargano, F.
Germani, S.
Giglietto, N.
Giordano, F.
Giroletti, M.
Glanzman, T.
Godfrey, G.
Grillo, L.
Grove, J. E.
Gruber, D.
Guiriec, S.
Hadasch, D.
Hayashida, M.
Hays, E.
Horan, D.
Iafrate, G.
Johannesson, G.
Johnson, A. S.
Johnson, W. N.
Kamae, T.
Kippen, R. M.
Knoedlseder, J.
Kuss, M.
Lande, J.
Latronico, L.
Longo, F.
Loparco, F.
Lott, B.
Lovellette, M. N.
Lubrano, P.
Mazziotta, M. N.
McEnery, J. E.
Meegan, C.
Mehault, J.
Michelson, P. F.
Mitthumsiri, W.
Monte, C.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Murgia, S.
Murphy, R.
Naumann-Godo, M.
Nuss, E.
Nymark, T.
Ohno, M.
Ohsugi, T.
Okumura, A.
Omodei, N.
Orlando, E.
Paciesas, W. S.
Panetta, J. H.
Parent, D.
Pesce-Rollins, M.
Petrosian, V.
Pierbattista, M.
Piron, F.
Pivato, G.
Poon, H.
Porter, T. A.
Preece, R.
Raino, S.
Rando, R.
Razzano, M.
Razzaque, S.
Reimer, A.
Reimer, O.
Ritz, S.
Sbarra, C.
Schwartz, R. A.
Sgro, C.
Share, G. H.
Siskind, E. J.
Spinelli, P.
Takahashi, H.
Tanaka, T.
Tanaka, Y.
Thayer, J. B.
Tibaldo, L.
Tinivella, M.
Tolbert, A. K.
Tosti, G.
Troja, E.
Uchiyama, Y.
Usher, T. L.
Vandenbroucke, J.
Vasileiou, V.
Vianello, G.
Vitale, V.
von Kienlin, A.
Waite, A. P.
Wilson-Hodge, C.
Wood, D. L.
Wood, K. S.
Yang, Z.
TI FERMI DETECTION OF gamma-RAY EMISSION FROM THE M2 SOFT X-RAY FLARE ON
2010 JUNE 12f
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE acceleration of particles; Sun: flares; Sun: particle emission; Sun:
X-rays, gamma rays
ID ACCELERATED-PARTICLE INTERACTIONS; LARGE-AREA TELESCOPE;
HIGH-ENERGY-NEUTRON; SOLAR-FLARES; BURST MONITOR; ELECTRONS;
SPECTROSCOPY; CALIBRATION; ABUNDANCES; COMPTON
AB The Geostationary Operational Environmental Satellite (GOES) M2-class solar flare, SOL2010-06-12T00: 57, was modest in many respects yet exhibited remarkable acceleration of energetic particles. The flare produced an similar to 50 s impulsive burst of hard X-and gamma-ray emission up to at least 400 MeV observed by the Fermi Gamma-ray Burst Monitor and Large Area Telescope experiments. The remarkably similar hard X-ray and high-energy gamma-ray time profiles suggest that most of the particles were accelerated to energies greater than or similar to 300 MeV with a delay of similar to 10 s from mildly relativistic electrons, but some reached these energies in as little as similar to 3 s. The gamma-ray line fluence from this flare was about 10 times higher than that typically observed from this modest GOES class of X-ray flare. There is no evidence for time-extended >100 MeV emission as has been found for other flares with high-energy gamma-rays.
C1 [Ackermann, M.] Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany.
[Ajello, M.; Allafort, A.; Bechtol, K.; Blandford, R. D.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Digel, S. W.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Dubois, R.; Glanzman, T.; Godfrey, G.; Grillo, L.; Hayashida, M.; Johnson, A. S.; Kamae, T.; Lande, J.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Okumura, A.; Omodei, N.; Orlando, E.; Panetta, J. H.; Petrosian, V.; Porter, T. A.; Reimer, A.; Reimer, O.; Tanaka, T.; Thayer, J. B.; Uchiyama, Y.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.] Stanford Univ, Dept Phys, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA.
[Ajello, M.; Allafort, A.; Bechtol, K.; Blandford, R. D.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Digel, S. W.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Dubois, R.; Glanzman, T.; Godfrey, G.; Grillo, L.; Hayashida, M.; Johnson, A. S.; Kamae, T.; Lande, J.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Okumura, A.; Omodei, N.; Orlando, E.; Panetta, J. H.; Petrosian, V.; Porter, T. A.; Reimer, A.; Reimer, O.; Tanaka, T.; Thayer, J. B.; Uchiyama, Y.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
[Atwood, W. B.; Razzano, M.; Ritz, S.] Univ Calif Santa Cruz, Dept Phys, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA.
[Atwood, W. B.; Razzano, M.; Ritz, S.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Baldini, L.; Bellazzini, R.; Bregeon, J.; Kuss, M.; Pesce-Rollins, M.; Razzano, M.; Sgro, C.; Tinivella, M.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Barbiellini, G.; Iafrate, G.; Longo, F.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Barbiellini, G.; Longo, F.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
[Bastieri, D.; Buson, S.; Rando, R.; Sbarra, C.; Tibaldo, L.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Bastieri, D.; Buson, S.; Pivato, G.; Poon, H.; Rando, R.; Tibaldo, L.] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
[Bhat, P. N.; Briggs, M. S.; Burgess, J. M.; Connaughton, V.; Guiriec, S.; Paciesas, W. S.; Preece, R.] Univ Alabama, CSPAR, Huntsville, AL 35899 USA.
[Bonamente, E.; Cecchi, C.; Germani, S.; Lubrano, P.; Tosti, G.] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy.
[Bonamente, E.; Cecchi, C.; Ciprini, S.; Germani, S.; Lubrano, P.; Tosti, G.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Univ Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Politecn Bari, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Gargano, F.; Giglietto, N.; Giordano, F.; Loparco, F.; Mazziotta, M. N.; Monte, C.; Raino, S.; Spinelli, P.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Bruel, P.; Fegan, S. J.; Fortin, P.; Horan, D.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Caliandro, G. A.; Hadasch, D.] Inst Ciencies Espai IEEE CSIC, Barcelona 08193, Spain.
[Casandjian, J. M.; Naumann-Godo, M.; Pierbattista, M.] Univ Paris Diderot, La AIM, CEA IRFU, CNRS,Serv Astrophys,CEA Saclay, F-91191 Gif Sur Yvette, France.
[Chekhtman, A.] Artep Inc, Ellicott City, MD 21042 USA.
[Cutini, S.] ASI, Sci Data Ctr, I-00044 Rome, Italy.
[Cohen-Tanugi, J.; Mehault, J.; Nuss, E.; Piron, F.; Vasileiou, V.] Univ Montpellier 2, Lab Univers & Particules Montpellier, CNRS, IN2P3, Montpellier, France.
[Conrad, J.; Yang, Z.] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden.
[Conrad, J.; Nymark, T.; Yang, Z.] Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.
[Dennis, B. R.; Ferrara, E. C.; Hays, E.; McEnery, J. E.; Schwartz, R. A.; Tolbert, A. K.; Troja, E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Dermer, C. D.; Grove, J. E.; Johnson, W. N.; Lovellette, M. N.; Murphy, R.; Wood, K. S.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Fukazawa, Y.] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan.
[Giroletti, M.] INAF Ist Radioastron, I-40129 Bologna, Italy.
[Gruber, D.; Orlando, E.; von Kienlin, A.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Hayashida, M.] Kyoto Univ, Grad Sch Sci, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan.
[Iafrate, G.] Ist Nazl Astrofis, Osservatorio Astron Trieste, I-34143 Trieste, Italy.
[Johannesson, G.] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland.
[Kippen, R. M.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
[Knoedlseder, J.] IRAP, CNRS, F-31028 Toulouse 4, France.
[Knoedlseder, J.] Univ Toulouse, GAHEC, UPS OMP, IRAP, Toulouse, France.
[Latronico, L.] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
[Lott, B.] Univ Bordeaux 1, CNRS, IN2P3, CEN Bordeaux Gradignan, F-33175 Gradignan, France.
[McEnery, J. E.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[McEnery, J. E.; Share, G. H.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Meegan, C.] Univ Space Res Assoc, Columbia, MD 21044 USA.
[Morselli, A.; Vitale, V.] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.
[Nymark, T.] Royal Inst Technol KTH, Dept Phys, SE-10691 Stockholm, Sweden.
[Ohno, M.; Okumura, A.; Tanaka, Y.] JAXA, Inst Space & Astronaut Sci, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan.
[Ohsugi, T.; Takahashi, H.] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan.
[Parent, D.; Razzaque, S.] George Mason Univ, Ctr Earth Observing & Space Res, Coll Sci, Fairfax, VA 22030 USA.
[Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria.
[Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria.
[Siskind, E. J.] NYCB Real Time Comp Inc, Lattingtown, NY 11560 USA.
[Vianello, G.] CIFS, I-10133 Turin, Italy.
[Vitale, V.] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
[Wilson-Hodge, C.] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
[Wood, D. L.] Praxis Inc, Alexandria, VA 22303 USA.
RP Ackermann, M (reprint author), Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany.
EM michael.briggs@nasa.gov; dgruber@mpe.mpg.de;
francesco.longo@trieste.infn.it; nicola.omodei@gmail.com;
gerald.share@nrl.navy.mil
RI Moskalenko, Igor/A-1301-2007; Mazziotta, Mario /O-8867-2015; Sgro,
Carmelo/K-3395-2016; Orlando, E/R-5594-2016; Dennis, Brian/C-9511-2012;
McEnery, Julie/D-6612-2012; Baldini, Luca/E-5396-2012; lubrano,
pasquale/F-7269-2012; Johannesson, Gudlaugur/O-8741-2015; Loparco,
Francesco/O-8847-2015; Gargano, Fabio/O-8934-2015; Kuss,
Michael/H-8959-2012; giglietto, nicola/I-8951-2012; Morselli,
Aldo/G-6769-2011; Reimer, Olaf/A-3117-2013; Tosti, Gino/E-9976-2013;
Rando, Riccardo/M-7179-2013; Johnson, Neil/G-3309-2014
OI Moskalenko, Igor/0000-0001-6141-458X; Mazziotta, Mario
/0000-0001-9325-4672; lubrano, pasquale/0000-0003-0221-4806;
Johannesson, Gudlaugur/0000-0003-1458-7036; Loparco,
Francesco/0000-0002-1173-5673; Gargano, Fabio/0000-0002-5055-6395;
giglietto, nicola/0000-0002-9021-2888; Morselli,
Aldo/0000-0002-7704-9553; Reimer, Olaf/0000-0001-6953-1385;
FU K. A. Wallenberg Foundation; Fermi GI program
FX Royal Swedish Academy of Sciences Research Fellow, funded by a grant
from the K. A. Wallenberg Foundation.; We thank the referee for
suggesting a more detailed examination of the delay between the hard
X-ray bremsstrahlung and >30 MeV emission observed by LAT. The Fermi LAT
Collaboration acknowledges generous ongoing support from a number of
agencies and institutes that have supported both the development and the
operation of the LAT as well as scientific data analysis. These include
the National Aeronautics and Space Administration and the Department of
Energy in the United States, the Commissariat a l'Energie Atomique and
the Centre National de la Recherche Scientifique/Institut National de
Physique Nucleaire et de Physique des Particules in France, the Agenzia
Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in
Italy, the Ministry of Education, Culture, Sports, Science and
Technology (MEXT), High Energy Accelerator Research Organization (KEK)
and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A.
Wallenberg Foundation, the Swedish Research Council and the Swedish
National Space Board in Sweden.; Co-authors Briggs, Murphy, Schwartz,
Share, and Tolbert were partially funded by the Fermi GI program to
conduct the joint spectroscopic studies presented in this paper.
NR 45
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PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 1
PY 2012
VL 745
IS 2
AR 144
DI 10.1088/0004-637X/745/2/144
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 893AI
UT WOS:000300326800042
ER
PT J
AU Finch, CT
Zacharias, N
Boyd, MR
Henry, TJ
Hambly, NC
AF Finch, Charlie T.
Zacharias, Norbert
Boyd, Mark R.
Henry, Todd J.
Hambly, Nigel C.
TI UCAC3 PROPER MOTION SURVEY. II. DISCOVERY OF NEW PROPER MOTION STARS IN
UCAC3 WITH 0.'' 40 yr(-1) > mu >= 0.'' 18 yr(-1) BETWEEN DECLINATIONS-47
degrees and 00 degrees
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE astrometry; solar neighborhood; stars: distances; stars: statistics;
surveys
ID CCD ASTROGRAPH CATALOG; SUPERCOSMOS SKY SURVEY; SOLAR NEIGHBORHOOD;
NEARBY STARS; SOUTHERN SKY; -47-DEGREES; -90-DEGREES; ASTROMETRY; DWARFS
AB We present 474 new proper motion stellar systems in the southern sky having no previously known components, with 0.'' 40 yr(-1) > mu >= 0.'' 18 yr(-1) between declinations -47 degrees and 0 degrees. In this second paper utilizing the U. S. Naval Observatory third CCD Astrograph Catalog (UCAC3) we complete our sweep of the southern sky for objects in the proper motion range targeted by this survey with R magnitudes ranging from 9.80 to 19.61. The new systems contribute a similar to 16% increase in the number of new stellar systems for the same region of sky reported in previous SuperCOSMOS Research Consortium On Nearby Stars (RECONS) surveys. Among the newly discovered stellar systems are 16 multiples, plus an additional ten components that are new common proper motion companions to previously known objects. A comparison of UCAC3 proper motions to those from Hipparcos, Tycho-2, Southern Proper Motion, and SuperCOSMOS indicates that all proper motions are consistent to similar to 10 mas yr(-1), with the exception of SuperCOSMOS. Distance estimates are derived for all stellar systems having SuperCOSMOS Sky Survey B-J, R-59F, and I-IVN plate magnitudes and Two Micron All Sky Survey (2MASS) infrared photometry. We find five new red dwarf systems estimated to be within 25 pc. These discoveries support results from previous proper motion surveys suggesting that more nearby stellar systems are to be found, particularly in the fainter, slower moving samples. In this second paper utilizing the UCAC3 we complete our sweep of the southern sky for objects in the proper motion range targeted by this survey with R magnitudes ranging from 9.80 to 19.61.
C1 [Finch, Charlie T.; Zacharias, Norbert] USN Observ, Washington, DC 20392 USA.
[Boyd, Mark R.; Henry, Todd J.] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30302 USA.
[Hambly, Nigel C.] Univ Edinburgh, Scottish Univ Phys Alliance, Inst Astron, Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland.
RP Finch, CT (reprint author), USN Observ, Washington, DC 20392 USA.
EM finch@usno.navy.mil
FU RECONS team at Georgia State University
FX We thank the entire UCAC team for making this proper motion survey
possible, and the USNO summer students, who helped with tagging HPM
stars in the UCAC3 catalog. Special thanks go to members of the RECONS
team at Georgia State University for their support, and John Subasavage
in particular for assistance with the SCR searches. This work has made
use of the SIMBAD, VizieR, and Aladin databases operated at the CDS in
Strasbourg, France. We have also made use of data from the Two Micron
All Sky Survey, SuperCOSMOS Science Archive, and the Southern Proper
Motion catalog.
NR 36
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 1
PY 2012
VL 745
IS 2
AR 118
DI 10.1088/0004-637X/745/2/118
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 893AI
UT WOS:000300326800016
ER
PT J
AU Razzaque, S
Dermer, CD
Finke, JD
AF Razzaque, Soebur
Dermer, Charles D.
Finke, Justin D.
TI LOWER LIMITS ON ULTRAHIGH-ENERGY COSMIC RAY AND JET POWERS OF TeV
BLAZARS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmic rays; galaxies: active; gamma rays: galaxies; gamma rays:
general; gamma rays: ISM
ID EXTRAGALACTIC MAGNETIC-FIELDS; LARGE-AREA TELESCOPE; BL-LAC OBJECTS;
ACTIVE GALACTIC NUCLEI; AIR-SHOWER ARRAY; VHE GAMMA-RAYS; SCALE
ANISOTROPY; BACKGROUND LIGHT; BURSTS; CONSTRAINTS
AB Lower limits on the power emitted in ultrahigh-energy cosmic rays (UHECRs), which are assumed to be protons with energy greater than or similar to 10(17)-10(20) eV, are derived for TeV blazars with the assumption that the observed TeV gamma-rays are generated due to interactions of these protons with cosmic microwave photons. The limits depend on the spectrum of the injected UHECR protons. While for a -2.2 injection spectrum the lower limits on the powers emitted in UHECRs by 1ES 0229+200, 1ES 1101-232, and 1ES 0347-121 are lower than their respective synchrotron luminosities (similar to 10(46) erg s(-1)), in the case of 1ES 1426+428 it exceeds the corresponding synchrotron luminosity by up to an order of magnitude. The proposed Auger North Observatory should be able to detect 4 x 10(19) eV cosmic-ray (CR) protons from 1ES 1426+428 within a few years of operation and test the TeV gamma-ray production model by UHECR energy losses while propagating along the line of sight or constrain the intergalactic magnetic field to be larger than similar to 10(-16) G in case of no detection. The lower limits on the apparent-isotropic jet power from accelerated 10(10)-10(20) eV proton spectra in the blazar jet is of the order of the Eddington luminosity of a 10(9) M-circle dot black hole for a CR injection spectrum -2.2 or harder for all blazars considered except for 1ES 1426+428. In the case of the latter, the apparent-isotropic jet power exceeds the Eddington luminosity by an order of magnitude. For an injection spectrum softer than -2.2, as is required to fit the observed CR data above similar to 10(17)-10(18) eV, the Eddington luminosity is exceeded by the lower limits on the jet power for all blazars considered.
C1 [Razzaque, Soebur; Dermer, Charles D.; Finke, Justin D.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Razzaque, Soebur] George Mason Univ, Sch Phys Astron & Computat Sci, Fairfax, VA 22030 USA.
RP Razzaque, S (reprint author), USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
EM srazzaqu@gmu.edu
FU NASA; Office of Naval Research; U.S. Naval Research Laboratory
FX We thank M. Bottcher, C. C. Cheung, L. Costamante, M. Mostafa, and K.
Murase for helpful comments and discussion. We also thank the anonymous
referee for a constructive report. This work is supported by grants from
the NASA Fermi Cycle 3 guest investigator program and by the Office of
Naval Research. The work of S. R. was funded while under contract with
the U.S. Naval Research Laboratory.
NR 69
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U1 0
U2 2
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 FEB 1
PY 2012
VL 745
IS 2
AR 196
DI 10.1088/0004-637X/745/2/196
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 893AI
UT WOS:000300326800094
ER
PT J
AU Montgomery, MT
Davis, C
Dunkerton, T
Wang, Z
Velden, C
Torn, R
Majumdar, SJ
Zhang, FQ
Smith, RK
Bosart, L
Bell, MM
Haase, JS
Heymsfield, A
Jensen, J
Campos, T
Boothe, MA
AF Montgomery, Michael T.
Davis, Christopher
Dunkerton, Timothy
Wang, Zhuo
Velden, Christopher
Torn, Ryan
Majumdar, Sharanya J.
Zhang, Fuqing
Smith, Roger K.
Bosart, Lance
Bell, Michael M.
Haase, Jennifer S.
Heymsfield, Andrew
Jensen, Jorgen
Campos, Teresa
Boothe, Mark A.
TI THE PRE-DEPRESSION INVESTIGATION OF CLOUD-SYSTEMS IN THE TROPICS
(PREDICT) EXPERIMENT Scientific Basis, New Analysis Tools, and Some
First Results
SO BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
LA English
DT Article
ID ENSEMBLE KALMAN FILTER; WAVE CRITICAL LAYER; SAHARAN AIR LAYER;
NUMERICAL SIMULATIONS; DATA ASSIMILATION; FIELD EXPERIMENT; EASTERLY
WAVES; TYPHOON NURI; GENESIS; ATLANTIC
C1 [Montgomery, Michael T.; Bell, Michael M.; Boothe, Mark A.] USN, Postgrad Sch, Dept Meteorol, Monterey, CA 93943 USA.
[Dunkerton, Timothy] NW Res Associates Inc, Bellevue, WA 98009 USA.
[Davis, Christopher; Heymsfield, Andrew; Jensen, Jorgen; Campos, Teresa] Natl Ctr Atmospher Res, Boulder, CO 80307 USA.
[Wang, Zhuo] Univ Illinois, Dept Atmospher Sci, Urbana, IL USA.
[Velden, Christopher] Univ Wisconsin, CIMSS, Madison, WI USA.
[Torn, Ryan; Bosart, Lance] SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 USA.
[Majumdar, Sharanya J.] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Miami, FL 33149 USA.
[Zhang, Fuqing] Penn State Univ, Dept Meteorol, University Pk, PA 16802 USA.
[Smith, Roger K.] Univ Munich, Inst Meteorol, D-8000 Munich, Germany.
[Haase, Jennifer S.] Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA.
[Montgomery, Michael T.; Bell, Michael M.] NOAA, Hurricane Res Div, Miami, FL USA.
RP Montgomery, MT (reprint author), USN, Postgrad Sch, Dept Meteorol, 1 Univ Circle, Monterey, CA 93943 USA.
EM mtmontgo@nps.edu
RI Bell, Michael/B-1144-2009; Heymsfield, Andrew/E-7340-2011; Zhang,
Fuqing/E-6522-2010
OI Bell, Michael/0000-0002-0496-331X; Zhang, Fuqing/0000-0003-4860-9985
FU National Science Foundation [ATM-0733380, 0850709, 0851077, 0840651,
1016095]; NASA [NNH09AK561, NNG09HG031]; NOAA's Hurricane Research
Division; NOAA/AOML; IFEX; GRIP; Earth Observing Laboratory of NCAR
FX This research was supported by the National Science Foundation Grants
ATM-0733380, 0850709, 0851077, 0840651, and 1016095; NASA Grants
NNH09AK561 and NNG09HG031; and a grant to MTM from NOAA's Hurricane
Research Division. The scientists from the PREDICT team wish to express
their gratitude to Stephen Nelson and Bradley Smull at NSF-ATM for
providing helpful guidance through the planning stages of this
experiment. The team expresses also their many thanks to Frank Marks
Jr., of NOAA/AOML and Ramesh Kakar of NASA and the corresponding science
teams of IFEX and GRIP for their enthusiastic collaboration and support.
The authors thank the many members of the Earth Observing Laboratory of
NCAR for their fantastic support of PREDICT. While there were too many
people involved to list all of them, scientists Jose Meitin, Greg
Stossmeister, Al Schanot, Al Cooper, Dave Rogers, Jeff Stith, Julie
Haggerty, Cindy Twohy, and Darin Toohey were vital to the success of the
project, as were operations managers Brigitte Baeuerle and Vidal
Salazar. Pilots Henry Boynton, Scotty McClain, Steve Thompson, Ed
Ringleman, and Lowell Genzlinger provided expert operation of the GV and
were eager to work with the PIs to optimize the flight track given
weather and air space restrictions. We wish to thank Gerald Thomsen and
the German Weather Service for providing the ECMWF data. Numerous
research scientists provided field support as well, including Tony
Wimmers and Derrick Herndon (CIMSS) and Jason Dunion (NOAA/AOML/HRD).
Numerous students and postdocs played a pivotal role in PREDICT, and
they have summarized their experiences in a companion article (Evans et
al. 2011). Finally, we wish to thank David Raymond and Carlos Lopez for
their dedicated participation in the experiment and providing the team
with valuable scientific input, debate, flight-planning support, and
mission-scientist leadership.
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PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0003-0007
J9 B AM METEOROL SOC
JI Bull. Amer. Meteorol. Soc.
PD FEB
PY 2012
VL 93
IS 2
BP 153
EP 172
DI 10.1175/BAMS-D-11-00046.1
PG 20
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 897FP
UT WOS:000300632200005
ER
PT J
AU Noble, SL
Wendel, LE
Donahue, MM
Buzzard, GT
Rundell, AE
AF Noble, Sarah L.
Wendel, Lindsay E.
Donahue, Maia M.
Buzzard, Gregery T.
Rundell, Ann E.
TI Sparse-Grid-Based Adaptive Model Predictive Control of HL60 Cellular
Differentiation
SO IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
LA English
DT Article
DE Biological system; control theory; interpolated dynamics; in vitro
experiments; nonunique and fuzzy parameters; tissue engineering
ID EXPERIMENTAL-DESIGN; SYSTEMS; VARIABLES
AB Quantitative methods such as model-based predictive control are known to facilitate the design of strategies to manipulate biological systems. This study develops a sparse-grid-based adaptive model predictive control (MPC) strategy to direct HL60 cellular differentiation. Sparse-grid sampling and interpolation support a computationally efficient adaptive MPC scheme in which multiple data-consistent regions of the model parameter space are identified and used to calculate a control compromise. The algorithm is evaluated in silico with structural model mismatch. Simulations demonstrate how the multiscenario control strategy more effectively manages the mismatch compared to a single scenario approach. Furthermore, the controller is evaluated in vitro to differentiate HL60 cells in both normal and perturbed environments. The controller-derived input sequence successfully achieves and sustains the specified target level of granulocytes when implemented in the laboratory. The results and analysis given here imply that adoption of this experiment planning technique to direct cell differentiation within more complex tissue engineered constructs will require the use of a reasonably accurate mathematical model and an extension of this algorithm to multiobjective controller design.
C1 [Rundell, Ann E.] Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA.
[Noble, Sarah L.] USN Acad, Weapons & Syst Engn Dept, Annapolis, MD 21401 USA.
[Wendel, Lindsay E.] Johns Hopkins Univ, Dept Biomed Engn, Baltimore, MD 21218 USA.
[Donahue, Maia M.] Dow AgroSci, Indianapolis, IN 46268 USA.
[Buzzard, Gregery T.] Purdue Univ, Dept Math, W Lafayette, IN 47907 USA.
RP Rundell, AE (reprint author), Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA.
EM noble@usna.edu; lwendel2@jhmi.edu; MMDonahue@dow.com;
gbuzzard@purdue.edu; rundell@purdue.edu
RI Rundell, Ann/P-1822-2014; Clegg, Lindsay/D-5945-2014
OI Clegg, Lindsay/0000-0001-8558-9341
FU National Science Foundation (NSF); American Recovery and Reinvestment
Act (ARRA) [ECCS-0846572]
FX Manuscript received May 27, 2011; revised September 19, 2011; accepted
October 15, 2011. Date of publication November 1, 2011; date of current
version January 20, 2012. This work was supported in part by the
National Science Foundation (NSF) CAREER Award and funded under the
American Recovery and Reinvestment Act of 2009 (ARRA) under the grant
ECCS-0846572. All work was performed at Purdue University. Asterisk
indicates corresponding author.
NR 33
TC 3
Z9 3
U1 0
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9294
J9 IEEE T BIO-MED ENG
JI IEEE Trans. Biomed. Eng.
PD FEB
PY 2012
VL 59
IS 2
BP 456
EP 463
DI 10.1109/TBME.2011.2174361
PG 8
WC Engineering, Biomedical
SC Engineering
GA 895PF
UT WOS:000300507800019
PM 22057041
ER
PT J
AU Chung, TH
Burdick, JW
AF Chung, Timothy H.
Burdick, Joel W.
TI Analysis of Search Decision Making Using Probabilistic Search Strategies
SO IEEE TRANSACTIONS ON ROBOTICS
LA English
DT Article
DE Autonomous systems; expected time to decision; probabilistic search;
robotic decision making; search theory
ID SEQUENTIAL SEARCH; DISCRETE SEARCH; PATH; COMPLEXITY; SENSORS; PURSUIT;
TARGET; COST
AB In this paper, we propose a formulation of the spatial search problem, where a mobile searching agent seeks to locate a stationary target in a given search region or declare that the target is absent. The objective is to minimize the expected time until this search decision of target's presence (and location) or absence is made. Bayesian update expressions for the integration of observations, including false-positive and false-negative detections, are derived to facilitate both theoretical and numerical analyses of various computationally efficient (semi-)adaptive search strategies. Closed-form expressions for the search decision evolution and analytic bounds on the expected time to decision are provided under assumptions on search environment and/or sensor characteristics. Simulation studies validate the probabilistic search formulation and comparatively demonstrate the effectiveness of the proposed search strategies.
C1 [Chung, Timothy H.] USN, Postgrad Sch, Dept Syst Engn, Monterey, CA 93943 USA.
[Burdick, Joel W.] CALTECH, Div Engn & Appl Sci, Pasadena, CA 91125 USA.
RP Chung, TH (reprint author), USN, Postgrad Sch, Dept Syst Engn, Monterey, CA 93943 USA.
EM thchung@nps.edu; jwb@robotics.caltech.edu
NR 36
TC 14
Z9 14
U1 2
U2 7
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1552-3098
J9 IEEE T ROBOT
JI IEEE Trans. Robot.
PD FEB
PY 2012
VL 28
IS 1
BP 132
EP 144
DI 10.1109/TRO.2011.2170333
PG 13
WC Robotics
SC Robotics
GA 891AJ
UT WOS:000300188300011
ER
PT J
AU Comon-Lundh, H
Meadows, C
AF Comon-Lundh, Hubert
Meadows, Catherine
TI Special Issue on Security and Rewriting Foreword
SO JOURNAL OF AUTOMATED REASONING
LA English
DT Editorial Material
C1 [Comon-Lundh, Hubert] LSV Ecole Normale Super Cachan, F-94235 Cachan, France.
[Meadows, Catherine] USN, Res Lab, Washington, DC 20375 USA.
RP Comon-Lundh, H (reprint author), LSV Ecole Normale Super Cachan, 61 Ave President Wilson, F-94235 Cachan, France.
EM comon@lsv.ens-cachan.fr; catherine.meadows@nrl.navy.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0168-7433
J9 J AUTOM REASONING
JI J. Autom. Reasoning
PD FEB
PY 2012
VL 48
IS 2
SI SI
BP 133
EP 134
DI 10.1007/s10817-011-9242-1
PG 2
WC Computer Science, Artificial Intelligence
SC Computer Science
GA 895KL
UT WOS:000300495000001
ER
PT J
AU Rudinsky, SL
Matteucci, MJ
AF Rudinsky, Sherri L.
Matteucci, Michael J.
TI EMERGENCY DEPARTMENT PRESENTATION OF SUPERIOR MESENTERIC ARTERY
SYNDROME: TWO CASES IN MARINE CORPS RECRUITS
SO JOURNAL OF EMERGENCY MEDICINE
LA English
DT Article
DE superior mesenteric artery (SMA); intestinal obstruction; duodenum;
abdominal pain; Marine Corps recruits
ID UNCOMMON CAUSE
AB Background: Superior mesenteric artery (SMA) syndrome is a relatively rare etiology of proximal intestinal obstruction. Obstruction results from marked narrowing of the angle between the SMA and aorta, causing compression of the third portion of the duodenum, most commonly as a result of precipitous weight loss. Intermittent non-specific symptoms at presentation often result in a delayed diagnosis, thus the importance of being aware of this condition. Objective: To familiarize emergency physicians with the presentation of SMA syndrome and discuss its diagnosis and management in the emergency department (ED). Case Report: We present two cases of SMA syndrome identified in Marine Corps recruits presenting to our ED. Conclusion: Emergency physicians should include SMA syndrome in the differential diagnosis of abdominal pain and vomiting in individuals with predisposing factors. Published by Elsevier Inc.
C1 [Rudinsky, Sherri L.; Matteucci, Michael J.] USN, Dept Emergency Med, San Diego Med Ctr, San Diego, CA 92134 USA.
RP Rudinsky, SL (reprint author), USN, Dept Emergency Med, San Diego Med Ctr, 34800 Bob Wilson Dr, San Diego, CA 92134 USA.
NR 14
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0736-4679
J9 J EMERG MED
JI J. Emerg. Med.
PD FEB
PY 2012
VL 42
IS 2
BP 155
EP 158
DI 10.1016/j.jemermed.2008.07.029
PG 4
WC Emergency Medicine
SC Emergency Medicine
GA 895ZS
UT WOS:000300535800005
PM 19111427
ER
PT J
AU Nordt, SP
Minns, A
Carstairs, S
Kreshak, A
Campbell, C
Tomaszweski, C
Hayden, SR
Clark, RF
Joshua, A
Ly, BT
AF Nordt, Sean Patrick
Minns, Alicia
Carstairs, Shaun
Kreshak, Allyson
Campbell, Colleen
Tomaszweski, Christian
Hayden, Stephen R.
Clark, Richard F.
Joshua, Alfred
Ly, Binh T.
TI MASS SOCIOGENIC ILLNESS INITIALLY REPORTED AS CARBON MONOXIDE POISONING
SO JOURNAL OF EMERGENCY MEDICINE
LA English
DT Article
DE mass sociogenic illness; mass psychogenic illness; transitional
situational disturbance; oximeter; poisoning
ID ELEMENTARY-SCHOOL; TOXIC EXPOSURE; EPIDEMIC; OUTBREAK
AB Background: Mass sociogenic illness (MSI) is a rare occurrence involving a constellation of physical signs and symptoms in a group of individuals that are exhibited subconsciously and have no corresponding organic etiology. Objectives: To describe an outbreak of MSI initially attributed to carbon monoxide (CO) poisoning. Case Reports: While attending a church service, one child fainted, followed by another. This led to multiple individuals reporting a constellation of symptoms. A total of 22 individuals presented to emergency departments (EDs) with neurologic, gastrointestinal, and respiratory complaints. The onset of symptoms followed evacuation in most of these patients. Prehospital personnel obtained carboxyhemoglobin (COHb) levels with a portable oximeter device, identifying levels up to 19% in 6 patients; 17 were taken to a tertiary hospital with a hyperbaric oxygen chamber, and the other 5 to a local ED. All other attendees were asymptomatic. Within the 15-min transport time, all patients were asymptomatic and had normal physical examinations. The mean age of patients was 13 years; 7 were male and 10 were female. Venous blood gas identified normal COHb levels in all patients. Pulse oximetry in the ED was normal. Another handheld oximeter device in the ED found normal COHb and methemoglobin levels. Conclusion: Varying complaints with onset after removal from the church suggest MSI. The hazardous materials team reproduced the scenario and no toxic gases were detected. Escalation of symptoms and an increased number of persons being affected along with increasing ambulance presence are common in MS'. We suspect that field oximeter readings were either aberrant from an inexperienced operator or were false-positive COHb readings. Clinicians should consider MSI after mass outbreaks of illness, particularly with rapid onset, rapid resolution of symptoms, and normal physical examinations and laboratory analyses. However, the diagnosis of MSI should be entertained only after potential toxicologic etiologies have been excluded. (C) 2012 Elsevier Inc.
C1 [Nordt, Sean Patrick] Univ So Calif, Dept Emergency Med, Keck Sch Med, Los Angeles, CA 90033 USA.
[Minns, Alicia; Kreshak, Allyson; Tomaszweski, Christian; Clark, Richard F.; Ly, Binh T.] Univ Calif San Diego, Div Med Toxicol, San Diego, CA 92103 USA.
[Minns, Alicia; Kreshak, Allyson; Campbell, Colleen; Tomaszweski, Christian; Hayden, Stephen R.; Clark, Richard F.; Joshua, Alfred; Ly, Binh T.] Univ Calif San Diego, Dept Emergency Med, San Diego, CA 92103 USA.
[Carstairs, Shaun] USN, Dept Emergency Med, Med Ctr, San Diego, CA 92152 USA.
[Tomaszweski, Christian; Hayden, Stephen R.] Univ Calif San Diego, Div Hyperbar Med, San Diego, CA 92103 USA.
[Hayden, Stephen R.] Univ Calif San Diego, Off Grad Med Educ, San Diego, CA 92103 USA.
RP Nordt, SP (reprint author), Univ So Calif, Dept Emergency Med, Keck Sch Med, 1200 N State St,Unit 1,Room 1011, Los Angeles, CA 90033 USA.
OI Carstairs, Shaun/0000-0003-4558-9704
NR 14
TC 2
Z9 3
U1 1
U2 6
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0736-4679
J9 J EMERG MED
JI J. Emerg. Med.
PD FEB
PY 2012
VL 42
IS 2
BP 159
EP 161
DI 10.1016/j.jemermed.2011.01.028
PG 3
WC Emergency Medicine
SC Emergency Medicine
GA 895ZS
UT WOS:000300535800006
PM 21658882
ER
PT J
AU Edwankar, RV
Edwankar, CR
Namjoshi, OA
Deschamps, JR
Cook, JM
AF Edwankar, Rahul V.
Edwankar, Chitra R.
Namjoshi, Ojas A.
Deschamps, Jeffrey R.
Cook, James M.
TI Bronsted Acid Mediated Cyclization of Enaminones. Rapid and Efficient
Access to the Tetracyclic Framework of the Strychnos Alkaloids
SO JOURNAL OF NATURAL PRODUCTS
LA English
DT Article
ID PICTET-SPENGLER REACTION; FUNCTIONALIZED ASPIDOSPERMA ALKALOIDS;
ENANTIOSPECIFIC TOTAL-SYNTHESIS; VELLOZO BAILLON APOCYNACEES; GENERAL
SYNTHETIC PATHWAY; C-H BONDS; INDOLE ALKALOIDS; GEISSOSPERMUM-VELLOSII;
LA GEISSOSPERMINE; ETUDE PHARMACODYNAMIQUE
AB The development of an efficient diastereoselective method that permits rapid construction of the tetracyclic core 17 of the Strychnos-Aspidosperma alkaloids is described. Enaminone 16, synthesized in high yield, has been cyclized under the influence of a Bronsted acid to provide the core tetracyclic framework 17 of the Strychnos alkaloids in optically active form or alternatively to the beta-ketoester tetrahydro-beta-carboline (THBC) unit 18, by varying the equivalents of acid and the molar concentration. Attempts to utilize 18 to form the C(7)-C(16) bond of the akuammiline related alkaloids represented by strictamine (22), using metal-carbenoid chemistry, are also described.
C1 [Edwankar, Rahul V.; Edwankar, Chitra R.; Namjoshi, Ojas A.; Cook, James M.] Univ Wisconsin, Dept Chem & Biochem, Milwaukee, WI 53201 USA.
[Deschamps, Jeffrey R.] USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
RP Cook, JM (reprint author), Univ Wisconsin, Dept Chem & Biochem, Milwaukee, WI 53201 USA.
EM capncook@uwm.edu
OI Deschamps, Jeffrey/0000-0001-5845-0010; Namjoshi,
Ojas/0000-0002-2142-3702
FU NIMH; Lynde and Harry Bradley Foundation; NIDA-NRL [Y1-DA1101]
FX We wish to acknowledge the NIMH (in part) and the Lynde and Harry
Bradley Foundation for support of this work. X-ray crystallographic
studies were supported by NIDA-NRL Interagency Agreement Number
Y1-DA1101.
NR 69
TC 35
Z9 35
U1 3
U2 23
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0163-3864
EI 1520-6025
J9 J NAT PROD
JI J. Nat. Prod.
PD FEB
PY 2012
VL 75
IS 2
BP 181
EP 188
DI 10.1021/np200759h
PG 8
WC Plant Sciences; Chemistry, Medicinal; Pharmacology & Pharmacy
SC Plant Sciences; Pharmacology & Pharmacy
GA 896WG
UT WOS:000300601500011
PM 22257244
ER
PT J
AU Colosi, JA
Duda, TF
Lin, YT
Lynch, JF
Newhall, AE
Cornuelle, BD
AF Colosi, John A.
Duda, Timothy F.
Lin, Ying-Tsong
Lynch, James F.
Newhall, Arthur E.
Cornuelle, Bruce D.
TI Observations of sound-speed fluctuations on the New Jersey continental
shelf in the summer of 2006
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID SHALLOW-WATER; OCEAN; PROPAGATION
AB Environmental sensors moored on the New Jersey continental shelf tracked constant density surfaces (isopycnals) for 35 days in the summer of 2006. Sound-speed fluctuations from internal-wave vertical isopycnal displacements and from temperature/salinity variability along isopycnals (spiciness) are analyzed using frequency spectra and vertical covariance functions. Three varieties of internal waves are studied: Diffuse broadband internal waves (akin to waves fitting the deep water Garrett/Munk spectrum), internal tides, and, to a lesser extent, nonlinear internal waves. These internal-wave contributions are approximately distinct in the frequency domain. It is found that in the main thermocline spicy thermohaline structure dominates the root mean square sound-speed variability, with smaller contributions coming from (in order) nonlinear internal waves, diffuse internal waves, and internal tides. The frequency spectra of internal-wave displacements and of spiciness have similar form, likely due to the advection of variable-spiciness water masses by horizontal internal-wave currents, although there are technical limitations to the observations at high frequency. In the low-frequency, internal-wave band the internal-wave spectrum follows frequency to the -1.81 power, whereas the spice spectrum shows a -1.73 power. Mode spectra estimated via covariance methods show that the diffuse internal-wave spectrum has a smaller mode bandwidth than Garrett/Munk and that the internal tide has significant energy in modes one through three. (C) 2012 Acoustical Society of America. [DOI: 10.1121/1.3666014]
C1 [Colosi, John A.] USN, Dept Oceanog, Postgrad Sch Monterey, Monterey, CA 93943 USA.
[Duda, Timothy F.; Lin, Ying-Tsong; Lynch, James F.; Newhall, Arthur E.] Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA.
[Cornuelle, Bruce D.] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
RP Colosi, JA (reprint author), USN, Dept Oceanog, Postgrad Sch Monterey, Monterey, CA 93943 USA.
RI Duda, Timothy/A-7282-2010;
OI Duda, Timothy/0000-0002-5797-5955; Cornuelle, Bruce/0000-0003-2110-3319
FU Office of Naval Research; Naval Postgraduate School's Undersea Warfare
Chair
FX This work was supported by the Office of Naval Research, and Professor
Colosi gratefully acknowledges his additional support from the Naval
Postgraduate School's Undersea Warfare Chair that he holds.
NR 24
TC 9
Z9 10
U1 0
U2 1
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 FEB
PY 2012
VL 131
IS 2
BP 1733
EP 1748
DI 10.1121/1.3666014
PN 2
PG 16
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 895IG
UT WOS:000300489100007
PM 22352602
ER
PT J
AU Colosi, JA
Duda, TF
Morozov, AK
AF Colosi, John A.
Duda, Timothy F.
Morozov, Andrey K.
TI Statistics of low-frequency normal-mode amplitudes in an ocean with
random sound-speed perturbations: Shallow-water environments
SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
LA English
DT Article
ID INTERNAL WAVE SPECTRUM; ACOUSTIC TRANSMISSIONS; COHERENCE; GUIDE; FIELD;
PROPAGATION; SHELF; SOLITONS; PACKETS
AB Second-and fourth-moment mode-amplitude statistics for low-frequency ocean sound propagation through random sound-speed perturbations in a shallow-water environment are investigated using Monte Carlo simulations and a transport theory for the cross-mode coherence matrix. The acoustic observables of mean and mean square intensity are presented and the importance of adiabatic effects and cross-mode coherence decay are emphasized. Using frequencies of 200 and 400 Hz, transport theory is compared with Monte Carlo simulations in a canonical shallow-water environment representative of the summer Mid-Atlantic Bight. Except for ranges less than a horizontal coherence length of the sound structure, the intensity moments from the two calculations are in good agreement. Corrections for the short range behavior are presented. For these frequencies the computed mode coupling rates are extremely small, and the propagation is strongly adiabatic with a rapid decay of cross-mode coherence. Coupling effects are predicted to be important at kilohertz frequencies. Decay of cross-mode coherence has important implications for acoustic interactions with nonlinear internal waves: For the case in which the acoustic path is not at glancing incidence with a nonlinear internal-wave front, adiabatic phase randomizing effects lead to a significantly reduced influence of the nonlinear waves on both mean and mean square intensity. [DOI: 10.1121/1.3666002]
C1 [Colosi, John A.] USN, Dept Oceanog, Postgrad Sch Monterey, Monterey, CA 93943 USA.
[Duda, Timothy F.; Morozov, Andrey K.] Woods Hole Oceanog Inst, Dept Appl Ocean Phys & Engn, Woods Hole, MA 02543 USA.
RP Colosi, JA (reprint author), USN, Dept Oceanog, Postgrad Sch Monterey, Monterey, CA 93943 USA.
RI Duda, Timothy/A-7282-2010
OI Duda, Timothy/0000-0002-5797-5955
FU Office of Naval Research; Naval Undersea Warfare Center's Under-Sea
Warfare chair at the Naval Postgraduate School
FX This work was supported by the Office of Naval Research and the Naval
Undersea Warfare Center's Under-Sea Warfare chair at the Naval
Postgraduate School.
NR 27
TC 14
Z9 16
U1 0
U2 3
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 FEB
PY 2012
VL 131
IS 2
BP 1749
EP 1761
DI 10.1121/1.3666002
PN 2
PG 13
WC Acoustics; Audiology & Speech-Language Pathology
SC Acoustics; Audiology & Speech-Language Pathology
GA 895IG
UT WOS:000300489100008
PM 22352603
ER
PT J
AU Wells, TS
Ryan, MAK
Jones, KA
Hooper, TI
Boyko, EJ
Jacobson, IG
Smith, TC
Gackstetter, GD
AF Wells, Timothy S.
Ryan, Margaret A. K.
Jones, Kelly A.
Hooper, Tomoko I.
Boyko, Edward J.
Jacobson, Isabel G.
Smith, Tyler C.
Gackstetter, Gary D.
TI A comparison of mental health outcomes in persons entering U.S. military
service before and after September 11, 2001
SO JOURNAL OF TRAUMATIC STRESS
LA English
DT Article
ID POSTTRAUMATIC-STRESS-DISORDER; ADVERSE CHILDHOOD EXPERIENCES; US
MILITARY; COMBAT DEPLOYMENT; MILLENNIUM COHORT; PRIMARY-CARE;
ALCOHOL-USE; PRIME-MD; UTILITY; RISK
AB It has been hypothesized that those who entered military service in the pre-September 11, 2001 era might have expectations incongruent with their subsequent experiences, increasing the risk for posttraumatic stress disorder (PTSD) or other mental disorders. A subset of Millennium Cohort Study participants who joined the military during 19951999 was selected and compared with a subset of members who joined the military in 2002 or later. Outcomes included new-onset symptoms of PTSD, depression, panic/anxiety, and alcohol-related problems. Multivariable methods adjusted for differences in demographic and military characteristics. More than 11,000 cohort members were included in the analyses. Those who entered service in the pre-September 11 era had lower odds of new-onset PTSD symptoms (odds ratio [OR] 0.74, 95% CI [0.59, 0.93]) compared with the post-September 11 cohort. There were no statistically significant differences in rates of new-onset symptoms of depression, panic/anxiety, or alcohol-related problems between the groups. The cohort who entered military service in the pre-September 11 era did not experience higher rates of new-onset mental health challenges compared with the cohort who entered service after September 11, 2001. Findings support the concept that the experience of war, and resulting psychological morbidity, is not a function of incongruent expectations.
C1 [Wells, Timothy S.; Jones, Kelly A.; Jacobson, Isabel G.; Smith, Tyler C.] USN, Dept Deployment Hlth Res, Hlth Res Ctr, San Diego, CA 92106 USA.
[Hooper, Tomoko I.] Uniformed Serv Univ Hlth Sci, Dept Prevent Med & Biometr, Bethesda, MD 20814 USA.
[Boyko, Edward J.] Seattle Epidemiol Res & Informat Ctr, Dept Vet Affairs Puget Sound Hlth Care Syst, Seattle, WA USA.
[Gackstetter, Gary D.] Analyt Serv Inc ANSER, Arlington, VA USA.
RP Wells, TS (reprint author), USN, Dept Deployment Hlth Res, Hlth Res Ctr, 140 Sylvester Rd, San Diego, CA 92106 USA.
EM tim_wells@broadstripe.net
RI Schueter, nicos/A-3625-2014
NR 32
TC 3
Z9 3
U1 0
U2 1
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0894-9867
J9 J TRAUMA STRESS
JI J. Trauma Stress
PD FEB
PY 2012
VL 25
IS 1
BP 17
EP 24
DI 10.1002/jts.21657
PG 8
WC Psychology, Clinical; Psychiatry
SC Psychology; Psychiatry
GA 897VA
UT WOS:000300685800004
PM 22354504
ER
PT J
AU Xu, X
Su, M
Levy, NB
Kaur, P
Garcia, R
Mohtashamian, A
Broome, HE
Dell'Aquila, ML
Wang, HY
AF Xu, X.
Su, M.
Levy, N. B.
Kaur, P.
Garcia, R.
Mohtashamian, A.
Broome, H. E.
Dell'Aquila, M. L.
Wang, H-Y
TI Myeloid Neoplasia with t(3;8)(q26;q24): Report of Four Cases and Review
of the English Literature
SO LABORATORY INVESTIGATION
LA English
DT Meeting Abstract
CT 101st Annual Meeting of the
United-States-and-Canadian-Academy-of-Pathology (USCAP)
CY MAR 17-23, 2012
CL Vancouver, CANADA
SP US & Canadian Acad Pathol (USCAP)
C1 Univ Calif San Diego, La Jolla, CA 92093 USA.
Univ Texas SW Med Ctr Dallas, Dallas, TX 75390 USA.
Dartmouth Hitchcock Med Ctr, Lebanon, NH 03766 USA.
USN, San Diego Med Ctr, San Diego, CA 92152 USA.
NR 0
TC 0
Z9 0
U1 0
U2 2
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 0023-6837
J9 LAB INVEST
JI Lab. Invest.
PD FEB
PY 2012
VL 92
SU 1
MA 1598
BP 382A
EP 382A
PG 1
WC Medicine, Research & Experimental; Pathology
SC Research & Experimental Medicine; Pathology
GA 885SA
UT WOS:000299799902110
ER
PT J
AU Drake, GW
Bolden, S
Dailey, J
McQuaid, MJ
Parrish, D
AF Drake, Gregory W.
Bolden, Sarah
Dailey, Jami
McQuaid, Michael J.
Parrish, Damon
TI New Takes on Nitrate Ester Chemistry: Salts with Oxygen-Rich Ammonium
Cations
SO PROPELLANTS EXPLOSIVES PYROTECHNICS
LA English
DT Article
DE Nitroxy salts; Gibbs free energy calculations
ID SET MODEL CHEMISTRY; ENERGETIC SALTS; IONIC LIQUIDS; PENTAERYTHRITOL
TETRANITRATE; THERMAL-DECOMPOSITION; ORGANIC NITRATES; METHYL NITRATE;
TOTAL ENERGIES; DENSITY; HEATS
AB Nitrate (anion) salts with nitroxy-functionalized ammonium cations were synthesized. Several revealed surprising thermal and hydrolytic stability. Various physical properties were measured, and Gibbs free energy (?Gr(298)) differences between the salts and postulated products of their thermal decomposition were computed. The computed differences indicate that salts with cations that have more than one nitroxy group are endothermic at 298 K. Nevertheless, the stability observed for some salts with this property indicates that kinetic barriers are sufficient to prevent facile decomposition at this temperature. This is in contrast to the case observed for nitrate salts of nitroxy-functionalized ammonium cations with acidic protons.
C1 [Drake, Gregory W.; Bolden, Sarah; Dailey, Jami] USA, Aviat & Missile Res Dev & Engn Ctr RDMR WDP E, Redstone Arsenal, AL 35898 USA.
[Dailey, Jami] ERC Inc, Weap Directorate, Redstone Arsenal, AL 35898 USA.
[McQuaid, Michael J.] USA, Res Lab, RDRL WMD D, Aberdeen Proving Ground, MD 21005 USA.
[Parrish, Damon] USN, Res Lab, Washington, DC 20375 USA.
RP Drake, GW (reprint author), USA, Aviat & Missile Res Dev & Engn Ctr RDMR WDP E, Bldg 7120 Redstone Rd, Redstone Arsenal, AL 35898 USA.
EM Gregory.w.drake@us.army.mil
FU SERDP [WP-1764]; EQBRD; AMRDEC
FX Funding for this study was provided under SERDP project WP-1764
(administered by Mr. J. Hough) and an EQBRD program (administered by Mr.
M. Wrazen and Ms. Kristin Dawag, both of the U.S. Army ARDEC, Picatinny
Arsenal, NJ). Most of the computations were conducted with CPU time
provided under the High Performance Computing and Modernization Office
Challenge project C4C, and were performed at the Air Force Research
Laboratory DoD Supercomputing Resource Center, Wright-Patterson Air
Force Base, OH. AMRDEC researchers are grateful to Mr. Michael Morrison,
Dr. Jamie Neidert, Mr. Paul Turner, Dr. Robin Buckelew, and Mr. Steve
Cornelius for their patience and financial support. The authors
acknowledge fruitful discussions with Mr. Scott Dawley (Aerojet
Corporation), Dr. Ronald Clawson (ATK Corporation), and Dr. Joe Flanagan
(Flanagan Enterprises).
NR 84
TC 2
Z9 2
U1 2
U2 4
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0721-3115
J9 PROPELL EXPLOS PYROT
JI Propellants Explos. Pyrotech.
PD FEB
PY 2012
VL 37
IS 1
BP 40
EP 51
DI 10.1002/prep.201100039
PG 12
WC Chemistry, Applied; Engineering, Chemical
SC Chemistry; Engineering
GA 897RB
UT WOS:000300671200006
ER
PT J
AU Sweeney, LM
Gut, CP
Gargas, ML
Reddy, G
Williams, LR
Johnson, MS
AF Sweeney, Lisa M.
Gut, Chester P., Jr.
Gargas, Michael L.
Reddy, Gunda
Williams, Larry R.
Johnson, Mark S.
TI Assessing the non-cancer risk for RDX
(hexahydro-1,3,5-trinitro-1,3,5-triazine) using physiologically based
pharmacokinetic (PBPK) modeling
SO REGULATORY TOXICOLOGY AND PHARMACOLOGY
LA English
DT Article
DE RDX; Physiologically-based pharmacokinetic model; PBPK; Reference dose
ID BOBWHITE COLINUS-VIRGINIANUS; CYCLOTRIMETHYLENETRINITRAMINE RDX;
EXPOSURE; 1,3,5-TRINITRO-1,3,5-TRIAZINE; TOXICITY; RAT
AB RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) is an explosive used in military applications. It has been detected in ground water surrounding US military installations and at manufacturing facilities. RDX has been shown to produce hepatotoxicity, testicular, and neurological effects in animals, the latter also in humans. The current chronic oral reference dose (RfD) of 0.003 mg/kg/day was derived based on prostate effects in rats. Here, we provide a reevaluation of the risk associated with RDX exposure by examining old and new data and using physiologically based pharmacokinetic (PBPK) modeling approaches. Candidate non-cancer endpoints in rodents were evaluated and the most plausible mode(s) of action were determined. A PBPK model was used to derive appropriate internal doses based on the mode of action, and then a benchmark dose (BMD) and the lower confidence limit on the BMD (BMDL) were determined using these internal doses in animals. Uncertainty factors (UF) were applied to the animal BMDL or no-observed effect level and a human PBPK model was used to determine a human equivalent dose resulting in the candidate RfDs (cRfDs). A proposed chronic RfD of 0.07 mg/kg/day, based on multiple effects observed in rats, was selected from among the cRfDs. (C) 2011 Elsevier Inc. All rights reserved.
C1 [Sweeney, Lisa M.; Gut, Chester P., Jr.; Gargas, Michael L.] USN, Med Res Unit Dayton, Wright Patterson AFB, OH 45433 USA.
[Reddy, Gunda; Williams, Larry R.; Johnson, Mark S.] USA, Inst Publ Hlth, Aberdeen Proving Ground, MD USA.
RP Sweeney, LM (reprint author), USN, Med Res Unit Dayton, 2729 R St, Wright Patterson AFB, OH 45433 USA.
EM lisa.sweeney.ctr@wpafb.af.mil
RI Sweeney, Lisa/K-5114-2012
OI Sweeney, Lisa/0000-0002-4672-7358
FU US Army Environmental Command [61063]
FX This work was sponsored by the US Army Environmental Command,
Installation Restoration Program, under Work Unit Number 61063; Army
personnel who are listed co-authors contributed to the interpretation of
the data, the preparation of the manuscript, and the decision to submit
the paper for publication.
NR 35
TC 4
Z9 4
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 0273-2300
J9 REGUL TOXICOL PHARM
JI Regul. Toxicol. Pharmacol.
PD FEB
PY 2012
VL 62
IS 1
BP 107
EP 114
DI 10.1016/j.yrtph.2011.12.007
PG 8
WC Medicine, Legal; Pharmacology & Pharmacy; Toxicology
SC Legal Medicine; Pharmacology & Pharmacy; Toxicology
GA 887XN
UT WOS:000299965400012
PM 22197625
ER
PT J
AU Hanbicki, AT
Cheng, SF
Goswami, R
van 't Erve, OMJ
Jonker, BT
AF Hanbicki, A. T.
Cheng, S. -F.
Goswami, R.
van 't Erve, O. M. J.
Jonker, B. T.
TI Electrical injection and detection of spin accumulation in Ge at room
temperature
SO SOLID STATE COMMUNICATIONS
LA English
DT Article
DE Semiconductors; Magnetic films and multilayers; Spin accumulation
ID SILICON; SEMICONDUCTORS; METAL; POLARIZATION; CONTACT; BARRIER; LOGIC
AB We inject spin-polarized electrons from an Fe/MgO tunnel barrier contact into n-type Ge(001) substrates with electron densities 2 x 10(16) < n < 8 x 10(17) cm(-3), and electrically detect the resulting spin accumulation using three-terminal Hanle measurements. We observe significant spin accumulation in the Ge up to room temperature. We observe precessional dephasing of the spin accumulation (the Hanle effect) in an applied magnetic field for both forward and reverse bias (spin extraction and injection), and determine spin lifetimes and corresponding diffusion lengths for temperatures of 225-300 K. The room temperature spin lifetime increases from tau(s) = 50 ps to 123 ps with decreasing electron concentration, as expected from electron spin resonance work on bulk Ge. The measured spin resistance-area product is in good agreement with values predicted by theory for samples with carrier densities below the metal-insulator transition (MIT), but 10(2) larger for samples above the MIT. These data demonstrate that the spin accumulation measured occurs in the Ge, although dopant-derived interface or band states may enhance the measured spin voltage above the MIT. We estimate the polarization in the Ge to be on the order of 1%. Published by Elsevier Ltd
C1 [Hanbicki, A. T.; Cheng, S. -F.; van 't Erve, O. M. J.; Jonker, B. T.] USN, Res Lab, Washington, DC 20375 USA.
[Goswami, R.] SAIC Inc, Mclean, VA 22012 USA.
RP Hanbicki, AT (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM Hanbicki@nrl.navy.mil
FU NRL
FX We would like to acknowledge C.H. Li and G. Kioseoglou for useful
conversations. This work was supported by core programs at NRL.
NR 33
TC 23
Z9 23
U1 3
U2 27
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-1098
J9 SOLID STATE COMMUN
JI Solid State Commun.
PD FEB
PY 2012
VL 152
IS 4
BP 244
EP 248
DI 10.1016/j.ssc.2011.11.033
PG 5
WC Physics, Condensed Matter
SC Physics
GA 896TA
UT WOS:000300593100002
ER
PT J
AU Eckel, FA
Allen, MS
Sittel, MC
AF Eckel, F. Anthony
Allen, Mark S.
Sittel, Matthew C.
TI Estimation of Ambiguity in Ensemble Forecasts
SO WEATHER AND FORECASTING
LA English
DT Article
ID PREDICTION SYSTEM; PROBABILISTIC FORECASTS; ECONOMIC VALUE; ECMWF;
CALIBRATION; UNCERTAINTY; SKILL; ERROR
AB Ambiguity is uncertainty in the prediction of forecast uncertainty, or in the forecast probability of a specific event, associated with random error in an ensemble forecast probability density function. In ensemble forecasting ambiguity arises from finite sampling and deficient simulation of the various sources of forecast uncertainty. This study introduces two practical methods of estimating ambiguity and demonstrates them on 5-day, 2-m temperature forecasts from the Japan Meteorological Agency's Ensemble Prediction System. The first method uses the error characteristics of the calibrated ensemble as well as the ensemble spread to predict likely errors in forecast probability. The second method applies bootstrap resampling on the ensemble members to produce multiple likely values of forecast probability. Both methods include forecast calibration since ambiguity results from random and not systematic errors, which must be removed to reveal the ambiguity. Additionally, use of a more robust calibration technique (improving beyond just correcting average errors) is shown to reduce ambiguity. Validation using a low-order dynamical system reveals that both estimation methods have deficiencies but exhibit some skill, making them candidates for application to decision making the subject of a companion paper.
C1 [Eckel, F. Anthony; Allen, Mark S.] USN, Postgrad Sch, Monterey, CA USA.
[Sittel, Matthew C.] Univ Corp Atmospher Res, Boulder, CO USA.
RP Eckel, FA (reprint author), Univ Washington, Dept Atmospher Sci, 408 ATG Bldg,Box 351640, Seattle, WA 98195 USA.
EM tony.eckel@noaa.gov
FU Naval Postgraduate School, Monterey, California; U.S. Air Force
FX This work was made possible by support from the Naval Postgraduate
School, Monterey, California, and the U.S. Air Force. Ensemble forecast
and analysis data were accessed from the THORPEX Interactive Grand
Global Ensemble (TIGGE) via the European Centre for Medium-Range Weather
Forecasts interface. We thank three anonymous reviewers for their very
helpful contributions.
NR 29
TC 8
Z9 8
U1 0
U2 2
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0882-8156
J9 WEATHER FORECAST
JI Weather Forecast.
PD FEB
PY 2012
VL 27
IS 1
BP 50
EP 69
DI 10.1175/WAF-D-11-00015.1
PG 20
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 895VW
UT WOS:000300525800003
ER
PT J
AU Allen, MS
Eckel, FA
AF Allen, Mark S.
Eckel, F. Anthony
TI Value from Ambiguity in Ensemble Forecasts
SO WEATHER AND FORECASTING
LA English
DT Article
ID ECONOMIC VALUE; PROBABILISTIC FORECASTS; PREDICTION SYSTEM; WEATHER
FORECASTS
AB This study explores the objective application of ambiguity information, that is, the uncertainty in forecast probability derived from an ensemble. One application approach, called uncertainty folding, merges ambiguity with forecast uncertainty information for subsequent use in standard risk-analysis decision making. Uncertainty folding is found to be of no practical benefit when tested in a low-order, weather forecast simulation. A second approach, called ulterior motives, attempts to use ambiguity information to aid secondary decision factors not considered in the standard risk analysis, while simultaneously maintaining the primary value associated with the probabilistic forecasts. Following ulterior motives, the practical utility of ambiguity information is demonstrated on real-world ensemble forecasts used to support decisions concerning the preparation for freezing temperatures paired with a secondary desire for the reduction in repeat false alarms. Sample products for communicating ambiguity to the user are also presented.
C1 [Allen, Mark S.; Eckel, F. Anthony] USN, Postgrad Sch, Monterey, CA USA.
RP Allen, MS (reprint author), 101 Nelson Dr, Offutt AFB, NE 68113 USA.
EM mark.allen@offutt.af.mil
FU Naval Postgraduate School, Monterey, California; U.S. Air Force
FX This work was made possible by support from the Naval Postgraduate
School, Monterey, California, and the U.S. Air Force. Ensemble forecast
and analysis data were accessed from the THORPEX Interactive Grand
Global Ensemble (TIGGE) via the European Centre for Medium-Range Weather
Forecast interface. This research represents a portion of the first
author's dissertation work. We thank three anonymous reviewers for their
very helpful contribution.
NR 22
TC 2
Z9 2
U1 1
U2 4
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0882-8156
EI 1520-0434
J9 WEATHER FORECAST
JI Weather Forecast.
PD FEB
PY 2012
VL 27
IS 1
BP 70
EP 84
DI 10.1175/WAF-D-11-00016.1
PG 15
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 895VW
UT WOS:000300525800004
ER
PT J
AU Zhang, L
Pu, ZX
Lee, WC
Zhao, QY
AF Zhang, Lei
Pu, Zhaoxia
Lee, Wen-Chau
Zhao, Qingyun
TI The Influence of Airborne Doppler Radar Data Quality on Numerical
Simulations of a Tropical Cyclone
SO WEATHER AND FORECASTING
LA English
DT Article
ID DATA ASSIMILATION; HIGH-RESOLUTION; X-BAND; DIFFERENTIAL REFLECTIVITY;
HURRICANE INITIALIZATION; CONVECTIVE STORMS; RAIN ATTENUATION; VELOCITY;
LANDFALL; SYSTEM
AB The impact of airborne Doppler radar data assimilation on improving numerical simulations of tropical cyclones (TCs) has been well recognized. However, the influence of radar data quality on the numerical simulation of tropical cyclones has not been given much attention. It is commonly assumed that higher quality radar data would be more beneficial to numerical simulations of TCs. This study examines the impact of the radar data quality control on assimilation of the airborne Doppler radar reflectivity and radial velocity observations in a numerical simulation of Typhoon Jangmi (2008). It is found that the quality of radar data has a strong influence on the numerical simulation of Typhoon Jangmi in terms of its track, intensity, and precipitation structures. Specifically, results suggest that a trade-off between the data quality and data coverage is necessary for different purposes in practical applications, as the higher quality data contribute to intensity forecast improvements, whereas data of lower quality but having better coverage are more beneficial to accurate track forecasting.
C1 [Zhang, Lei; Pu, Zhaoxia] Univ Utah, Dept Atmospher Sci, Salt Lake City, UT 84112 USA.
[Zhao, Qingyun] USN, Res Lab, Monterey, CA USA.
[Lee, Wen-Chau] Natl Ctr Atmospher Res, Boulder, CO 80307 USA.
RP Pu, ZX (reprint author), Univ Utah, Dept Atmospher Sci, Rm 819,135 S 1460 E, Salt Lake City, UT 84112 USA.
EM zhaoxia.pu@utah.edu
FU Office of Naval Research (ONR) [N000140810308]
FX This study is supported by the Office of Naval Research (ONR) TCS-08
program through Award N000140810308. The computer time for this study
was provided by the Center for High Performance Computing (CHPC) at the
University of Utah. Comments from two anonymous reviewers and Prof.
Da-lin Zhang (University of Maryland) are greatly appreciated, as they
were very helpful in improving the manuscript.
NR 34
TC 4
Z9 4
U1 0
U2 1
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0882-8156
J9 WEATHER FORECAST
JI Weather Forecast.
PD FEB
PY 2012
VL 27
IS 1
BP 231
EP 239
DI 10.1175/WAF-D-11-00028.1
PG 9
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 895VW
UT WOS:000300525800014
ER
PT J
AU Babich, YV
Feigelson, BN
Yelisseyev, AP
Chepurov, AI
AF Babich, Yu. V.
Feigelson, B. N.
Yelisseyev, A. P.
Chepurov, A. I.
TI Nitrogen incorporation in octahedral diamonds grown in the Fe-Ni-C
system
SO GEOCHEMISTRY INTERNATIONAL
LA English
DT Article
DE diamond; nitrogen; defects in diamond; IR spectroscopy; diamond
synthesis
ID HPHT SYNTHETIC DIAMONDS; INFRARED-ABSORPTION; CONTAINING CENTERS;
SINGLE-CRYSTALS; NICKEL; DEFECTS; AGGREGATION; IMPURITIES; KINETICS;
COBALT
C1 [Babich, Yu. V.; Yelisseyev, A. P.; Chepurov, A. I.] Russian Acad Sci, Inst Geol & Mineral, Siberian Branch, Novosibirsk 630090, Russia.
[Feigelson, B. N.] USN, Res Lab, Washington, DC 20375 USA.
RP Babich, YV (reprint author), Russian Acad Sci, Inst Geol & Mineral, Siberian Branch, Pr Koptyuga 3, Novosibirsk 630090, Russia.
EM Babich@igm.nsc.ru
RI Yelisseyev, Alexander/A-3846-2014; Babich, Yuri/A-5655-2014; Chepurov,
Anatoli/A-6730-2014
NR 25
TC 5
Z9 5
U1 1
U2 12
PU MAIK NAUKA/INTERPERIODICA/SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA
SN 0016-7029
J9 GEOCHEM INT+
JI Geochem. Int.
PD FEB
PY 2012
VL 50
IS 2
BP 179
EP 184
DI 10.1134/S0016702911120032
PG 6
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 892KF
UT WOS:000300284400006
ER
PT J
AU Santomauro, M
Masterson, J
Marguet, C
Crain, D
AF Santomauro, Michael
Masterson, James
Marguet, Charles
Crain, Donald
TI DEMOGRAPHICS OF MEN RECEIVING VASECTOMIES IN THE US MILITARY 2000-2009
SO JOURNAL OF SEXUAL MEDICINE
LA English
DT Meeting Abstract
C1 [Santomauro, Michael; Masterson, James; Marguet, Charles; Crain, Donald] NMCSD, San Diego, CA USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1743-6095
J9 J SEX MED
JI J. Sex. Med.
PD FEB
PY 2012
VL 9
SU 1
SI SI
BP 42
EP 42
PG 1
WC Urology & Nephrology
SC Urology & Nephrology
GA 886BW
UT WOS:000299826700135
ER
PT J
AU Croft, M
Jisrawi, N
Ignatov, A
Holtz, RL
Zhong, Z
AF Croft, Mark
Jisrawi, Najeh
Ignatov, Alexander
Holtz, Ronald L.
Zhong, Zhong
TI Fatigue crack growth "overload effect": mechanistic insights from
in-situ synchrotron measurements
SO JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN
LA English
DT Article
DE Fatigue; strain; X-ray; synchrotron; overload
ID X-RAY-DIFFRACTION; FULL-PROFILE ANALYSIS; DELTA-K; STRAIN; FIELDS
AB Synchrotron-based, high-energy X-ray diffraction measurements are used to study the local strain fields underlying the transient fatigue crack growth rate retardation produced by a single overload cycle known as the overload effect. Specifically, 4140 steel compact tension specimens fatigued for varying levels of crack growth after an overload cycle have been studied with in-situ diffraction under varying external loads. The load responses of the strain at the overload-position, versus at the crack tip, are focused upon in detail. The large compressive residual strain at the overload-point is observed to remain essentially unchanged even after the overload-point is left in the wake of the propagating crack tip. The differential strain-load response at the crack-tip/overload position before and immediately after the overload is seen to be unchanged. Once the overload point is behind the crack tip, a highly nonlinear behavior is observed in which the load response of the strain field transfers from the overload -point to the crack tip when the load exceeds a critical value. The results are discussed in terms of plasticity-induced crack face contact at the overload point as an important local mechanism contributing to the "overload effect" in this specific system.
C1 [Croft, Mark; Jisrawi, Najeh; Ignatov, Alexander] Rutgers State Univ, Dept Phys, Piscataway, NJ 08854 USA.
[Croft, Mark; Zhong, Zhong] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
[Jisrawi, Najeh] Univ Sharjah, Dept Appl Phys, Sharjah, U Arab Emirates.
[Holtz, Ronald L.] USN, Res Lab, Washington, DC 20375 USA.
RP Croft, M (reprint author), Rutgers State Univ, Dept Phys, Piscataway, NJ 08854 USA.
EM croft@physics.rutgers.edu
FU Office of Naval Research (ONR) [N00014-04-1-0194]; DURIP ONR
[N00014-02-1-0772]; US Department of Energy [DE-AC02-76CH00016]
FX This work was supported by Office of Naval Research (ONR) under contract
no. N00014-04-1-0194 and DURIP ONR N00014-02-1-0772. Utilization of the
NSLS was supported by US Department of Energy contract
DE-AC02-76CH00016.
NR 32
TC 3
Z9 3
U1 0
U2 13
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 0309-3247
J9 J STRAIN ANAL ENG
JI J. Strain Anal. Eng. Des.
PD FEB
PY 2012
VL 47
IS 2
BP 83
EP 94
DI 10.1177/0309324711435197
PG 12
WC Engineering, Mechanical; Mechanics; Materials Science, Characterization
& Testing
SC Engineering; Mechanics; Materials Science
GA 891MW
UT WOS:000300222300003
ER
PT J
AU Huang, YH
Montgomery, MT
Wu, CC
AF Huang, Yi-Hsuan
Montgomery, Michael T.
Wu, Chun-Chieh
TI Concentric Eyewall Formation in Typhoon Sinlaku (2008). Part II:
Axisymmetric Dynamical Processes
SO JOURNAL OF THE ATMOSPHERIC SCIENCES
LA English
DT Article
ID TROPICAL CYCLONE STRUCTURE; HURRICANE BOUNDARY-LAYER; KALMAN FILTER
ENKF; ASSIMILATION; INTENSITY; ENSEMBLE; MODEL; DOTSTAR; TRACK
AB In Part I of this study, the association between the secondary eyewall formation (SEF) and the broadening of the outer swirling wind in Typhoon Sinlaku (2008) was documented.
The findings from Part I help lay the groundwork for the application of a newly proposed intensification paradigm to SEF. Part IT presents a new model for SEF that utilizes this new paradigm and its axisymmetric view of the dynamics. The findings point to a sequence of structure changes that occur in the vortex's outer-core region, culminating in SEF. The sequence begins with a broadening of the tangential winds, followed by an increase of the corresponding boundary layer (BL) inflow and an enhancement of convergence in the BL where the secondary eyewall forms. The narrow region of strong BL convergence is associated with the generation of supergradient winds in and just above the BL that acts to rapidly decelerate inflow there. The progressive strengthening of BL inflow and the generation of an effective adverse radial force therein leads to an eruption of air from the BL to support convection outside the primary eyewall in a favorable thermodynamic/kinematic environment.
The results suggest that the unbalanced response in the BL serves as an important mechanism for initiating and sustaining a ring of deep convection in a narrow supergradient wind zone outside the primary eyewall. This progressive BL control on SEF suggests that the BL scheme and its coupling to the interior flow need to be adequately represented in numerical models to improve the prediction of SEF timing and preferred location.
C1 [Huang, Yi-Hsuan; Wu, Chun-Chieh] Natl Taiwan Univ, Dept Atmospher Sci, Taipei 106, Taiwan.
[Montgomery, Michael T.] USN, Postgrad Sch, Dept Meteorol, Monterey, CA 93943 USA.
[Montgomery, Michael T.] NOAA, AOML, Hurricane Res Div, Miami, FL USA.
RP Wu, CC (reprint author), Natl Taiwan Univ, Dept Atmospher Sci, 1,Sec 4,Roosevelt Rd, Taipei 106, Taiwan.
EM cwu@typhoon.as.ntu.edu.tw
OI Wu, Chun-Chieh/0000-0002-3612-4537
FU National Science Council of Taiwan [NSC97-2111-M-002-016-MY3,
NSC98-2111-M-002-008-MY3, NSC98-2917-I-002-127]; Central Weather Bureau
of Taiwan [MOTC-CWB-97-6M-01, MOTC-CWB-98-6M-01]; Office of Naval
Research [N00173-08-1-G007]; NOAA's Hurricane Research Division; U.S.
Office of Naval Research [N001408WR20129]
FX The work of CCW and YHH is supported by the National Science Council of
Taiwan through Grants NSC97-2111-M-002-016-MY3,
NSC98-2111-M-002-008-MY3, and NSC98-2917-I-002-127, the Central Weather
Bureau of Taiwan through Grants MOTC-CWB-97-6M-01 and MOTC-CWB-98-6M-01,
and the Office of Naval Research Grant N00173-08-1-G007. The work of MTM
was supported by a grant from NOAA's Hurricane Research Division to the
U.S. Naval Postgraduate School and the U.S. Office of Naval Research
Grant N001408WR20129. The authors thank Roger Smith for his perceptive
comments on a near-final draft of the manuscript. Valuable comments from
the three reviewers are also appreciated.
NR 31
TC 54
Z9 54
U1 2
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 FEB
PY 2012
VL 69
IS 2
BP 662
EP 674
DI 10.1175/JAS-D-11-0114.1
PG 13
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 885SI
UT WOS:000299800700015
ER
PT J
AU Lang, STK
Jones, SC
Leutbecher, M
Peng, MS
Reynolds, CA
AF Lang, Simon T. K.
Jones, Sarah C.
Leutbecher, Martin
Peng, Melinda S.
Reynolds, Carolyn A.
TI Sensitivity, Structure, and Dynamics of Singular Vectors Associated with
Hurricane Helene (2006)
SO JOURNAL OF THE ATMOSPHERIC SCIENCES
LA English
DT Article
ID CONDITIONAL SYMMETRIC INSTABILITY; ENSEMBLE PREDICTION SYSTEM; TROPICAL
CYCLONE; DATA ASSIMILATION; PHYSICAL PROCESSES; CORE STRUCTURE; INITIAL
TESTS; POTENTIAL USE; PART I; GROWTH
AB The sensitivity of singular vectors (SVs) associated with Hurricane Helene (2006) to resolution and diabatic processes is investigated. Furthermore, the dynamics of their growth are analyzed. The SVs are calculated using the tangent linear and adjoint model of the integrated forecasting system (IFS) of the European Centre for Medium-Range Weather Forecasts with a spatial resolution up to TL255 (similar to 80 km) and 48-h optimization time. The TL255 moist (diabatic) SVs possess a three-dimensional spiral structure with significant horizontal and vertical upshear tilt within the tropical cyclone (TC). Also, their amplitude is larger than that of dry and lower-resolution SVs closer to the center of Helene. Both higher resolution and diabatic processes result in stronger growth being associated with the TC compared to other flow features. The growth of the SVs in the vicinity of Helene is associated with baroclinic and barotropic mechanisms. The combined effect of higher resolution and diabatic processes leads to significant differences of the SV structure and growth dynamics within the core and in the vicinity of the TC. If used to initialize ensemble forecasts with the IFS, the higher-resolution moist SVs cause larger spread of the wind speed, track, and intensity of Helene than their lower-resolution or dry counterparts. They affect the outflow of the TC more strongly, resulting in a larger downstream impact during recurvature. Increasing the resolution or including diabatic effects degrades the linearity of the SVs. While the impact of diabatic effects on the linearity is small at low resolution, it becomes large at high resolution.
C1 [Lang, Simon T. K.; Jones, Sarah C.] Karlsruhe Inst Technol, Inst Meteorol & Climate Res IMK TRO, Karlsruhe, Germany.
[Leutbecher, Martin] European Ctr Medium Range Weather Forecasts, Reading, Berks, England.
[Peng, Melinda S.; Reynolds, Carolyn A.] USN, Res Lab, Monterey, CA USA.
RP Lang, STK (reprint author), Karlsruhe Inst Technol KIT, Inst Meteorol & Climate Res, Campus Sud, D-76128 Karlsruhe, Germany.
EM simon.lang@kit.edu
RI Jones, Sarah/B-2339-2013;
OI Reynolds, Carolyn/0000-0003-4690-4171
FU German Research Foundation (DFG) as part of the research unit PANDOWAE
[FOR 896]; Naval Research Laboratory; Office of Naval Research
FX This project was supported by the German Research Foundation (DFG) as
part of the research unit PANDOWAE (FOR 896). Acknowledgment is made for
the use of ECMWF's computing facilities through the special project "The
impact of tropical cyclones on extratropical predictability." We thank
Jan Barkmejier and Leonhard Scheck for valuable discussions and three
anonymous reviewers for their helpful comments. We are grateful to
Carsten Maass and his colleagues at ECMWF user support for technical
support. We acknowledge the Naval Research Laboratory and Office of
Naval Research Global Visiting Scientist Program for financial support.
NR 59
TC 11
Z9 11
U1 0
U2 5
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0022-4928
EI 1520-0469
J9 J ATMOS SCI
JI J. Atmos. Sci.
PD FEB
PY 2012
VL 69
IS 2
BP 675
EP 694
DI 10.1175/JAS-D-11-048.1
PG 20
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 885SI
UT WOS:000299800700016
ER
PT J
AU Rolon, JE
Wijesundara, KC
Ulloa, SE
Bracker, AS
Gammon, D
Stinaff, EA
AF Rolon, Juan E.
Wijesundara, Kushal C.
Ulloa, Sergio E.
Bracker, Allan S.
Gammon, Daniel
Stinaff, Eric A.
TI Oscillatory acoustic phonon relaxation of excitons in quantum dot
molecules
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
AB We study electrically tunable self-assembled InAs quantum dot molecules through photoluminescence (PL) and time-resolved PL measurements. For the model we assume quantum dots with cylindrical symmetry, for which the confinement potentials have been modeled as narrow quantum wells in the growth and in-plane directions matched to parabolic potentials. We focus on the hole scattering rates by bulk acoustic phonons, as these rates are the leading contribution for the neutral indirect exciton relaxation rate when the electron localizes primarily on one dot. The hole-phonon scattering structure factor for acoustic phonons is found to contain a phase relationship between the phonon wave and the hole wave function, which can be tuned by an external electric field. The phase relationship leads to interference effects and tunable oscillatory relaxation rates of indirect excitons, in agreement with experiments. (C) 2012 Optical Society of America
C1 [Rolon, Juan E.; Wijesundara, Kushal C.; Ulloa, Sergio E.; Stinaff, Eric A.] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA.
[Rolon, Juan E.; Wijesundara, Kushal C.; Ulloa, Sergio E.; Stinaff, Eric A.] Ohio Univ, Nanoscale & Quantum Phenomena Inst, Athens, OH 45701 USA.
[Bracker, Allan S.; Gammon, Daniel] USN, Res Lab, Washington, DC 20375 USA.
RP Wijesundara, KC (reprint author), Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA.
EM jr132405@ohio.edu
RI Ulloa, Sergio/F-4621-2011;
OI Ulloa, Sergio/0000-0002-3091-4984; Rolon, Juan E/0000-0002-6104-9321
NR 15
TC 3
Z9 3
U1 1
U2 12
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 FEB
PY 2012
VL 29
IS 2
BP A146
EP A153
PG 8
WC Optics
SC Optics
GA 894DN
UT WOS:000300407300019
ER
PT J
AU Scheibner, M
Economou, SE
Bracker, AS
Gammon, D
Ponomarev, IV
AF Scheibner, Michael
Economou, Sophia E.
Bracker, Allan S.
Gammon, Daniel
Ponomarev, Ilya V.
TI Entangled photon pair generation with quantum dot molecules
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
AB Here we propose a mechanism to generate entangled photon pairs that makes use of double dot quantum dot molecules. Molecular biexciton and molecular exciton states allow us to circumvent the which-path problem that, in most cases, makes the use of single quantum dots technologically challenging. (C) 2012 Optical Society of America
C1 [Scheibner, Michael] Univ Calif Merced, Merced, CA 95343 USA.
[Economou, Sophia E.; Bracker, Allan S.; Gammon, Daniel] USN, Res Lab, Washington, DC 20375 USA.
[Ponomarev, Ilya V.] Thomson Reuters, Rockville, MD 20850 USA.
RP Scheibner, M (reprint author), Univ Calif Merced, 5200 N Lake Rd, Merced, CA 95343 USA.
EM mscheibner@ucmerced.edu
RI Ponomarev, Ilya/F-5183-2010
OI Ponomarev, Ilya/0000-0002-8584-6034
NR 21
TC 2
Z9 2
U1 0
U2 14
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 FEB
PY 2012
VL 29
IS 2
BP A82
EP A85
PG 4
WC Optics
SC Optics
GA 894DN
UT WOS:000300407300012
ER
PT J
AU Sun, B
Yao, W
Xu, XD
Bracker, AS
Gammon, D
Sham, LJ
Steel, D
AF Sun, Bo
Yao, Wang
Xu, Xiaodong
Bracker, Allan S.
Gammon, Daniel
Sham, L. J.
Steel, Duncan
TI Persistent optical nuclear spin narrowing in a singly charged InAs
quantum dot
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
ID STATE PREPARATION; ELECTRON-SPIN; SPECTROSCOPY; EXCITATION; LOCKING
AB We review the investigation of the hole-assisted dynamical nuclear spin polarization mechanism in a singly charged InAs quantum dot. Using coherent dark state spectroscopy, we measure the locking of the Overhauser field to a value determined only by the laser frequencies. Importantly, we review data that the locking effect can suppress nuclear spin fluctuations. We determine the onset time of the nuclear spin narrowing effect and its persistence absent laser interactions by directly measuring the enhancement of the electron spin coherence. This nuclear field locking effect can be explained in terms of an anisotropic hyperfine coupling between the hole spin and the nuclear spins. (C) 2012 Optical Society of America
C1 [Sun, Bo; Steel, Duncan] Univ Michigan, Harrison M Randall Lab Phys, Ann Arbor, MI 48109 USA.
[Yao, Wang] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China.
[Yao, Wang] Univ Hong Kong, Ctr Theoret & Computat Phys, Hong Kong, Hong Kong, Peoples R China.
[Xu, Xiaodong] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Bracker, Allan S.; Gammon, Daniel] USN, Res Lab, Washington, DC 20375 USA.
[Sham, L. J.] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
RP Steel, D (reprint author), Univ Michigan, Harrison M Randall Lab Phys, Ann Arbor, MI 48109 USA.
EM dst@eecs.umich.edu
RI Yao, Wang/C-1353-2008
OI Yao, Wang/0000-0003-2883-4528
FU United States Army Research Office (USARO) MURI [W911NF0910406];
National Science Foundation (NSF); United States Air Force Office of
Scientific Research (AFOSR); Defense Advanced Research Projects Agency
(DARPA)
FX We thank L.-M. Duan and Z.-X. Gong for fruitful discussions. This
research was supported by the United States Army Research Office (USARO)
MURI award W911NF0910406. The authors would also like to acknowledge the
National Science Foundation (NSF), United States Air Force Office of
Scientific Research (AFOSR), and Defense Advanced Research Projects
Agency (DARPA) for their support.
NR 30
TC 2
Z9 2
U1 0
U2 9
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 FEB
PY 2012
VL 29
IS 2
BP A119
EP A126
PG 8
WC Optics
SC Optics
GA 894DN
UT WOS:000300407300016
ER
PT J
AU Xu, X
Su, M
Levy, NB
Kaur, P
Garcia, R
Mohtashamian, A
Broome, HE
Dell'Aquila, ML
Wang, HY
AF Xu, X.
Su, M.
Levy, N. B.
Kaur, P.
Garcia, R.
Mohtashamian, A.
Broome, H. E.
Dell'Aquila, M. L.
Wang, H-Y
TI Myeloid Neoplasia with t(3;8)(q26;q24): Report of Four Cases and Review
of the English Literature
SO MODERN PATHOLOGY
LA English
DT Meeting Abstract
CT 101st Annual Meeting of the
United-States-and-Canadian-Academy-of-Pathology
CY MAR 17-23, 2012
CL Vancouver, CANADA
SP US & Canadian Acad Pathol
C1 Univ Calif San Diego, La Jolla, CA 92093 USA.
Univ Texas SW Med Ctr Dallas, Dallas, TX 75390 USA.
Dartmonth Hitchcook Med Ctr, Lebanon, NH USA.
USN, Med Ctr, San Diego, CA USA.
NR 0
TC 0
Z9 0
U1 0
U2 2
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 0893-3952
J9 MODERN PATHOL
JI Mod. Pathol.
PD FEB
PY 2012
VL 25
SU 2
MA 1598
BP 382A
EP 382A
PG 1
WC Pathology
SC Pathology
GA 888EP
UT WOS:000299986902110
ER
PT J
AU Kramida, A
Brown, CM
Feldman, U
Reader, J
AF Kramida, A.
Brown, C. M.
Feldman, U.
Reader, J.
TI Extension and new level optimization of the Ne IV spectrum
SO PHYSICA SCRIPTA
LA English
DT Article
ID MULTIPLY IONIZED NEON; ENERGY-LEVELS; EXTREME-ULTRAVIOLET; LINES;
SPECTROSCOPY; FORBIDDEN
AB Spectra of Ne emitted by a Penning discharge were recorded in the extreme ultraviolet region between 140 and 359 angstrom on a 10.7 m grazing-incidence spectrograph with phosphor storage image plates. These spectra provided 33 newly identified lines of Ne IV and improved measurements of an additional 58 lines in this spectral region. In addition, 42 lines were newly identified in the previously observed spectra of a capillary discharge (Gallardo et al 2007 Spectrosc. Lett. 40 879) in the vacuum ultraviolet region between 586 and 1410 angstrom. Combining these new measurements and identifications with those previously reported in the literature, we derived 45 new energy levels of Ne IV and significantly improved the accuracy of most of the previously known ones.
C1 [Kramida, A.; Reader, J.] Natl Inst Stand & Technol, Gaithersburg, MD 20889 USA.
[Brown, C. M.] USN, Res Lab, Washington, DC 20375 USA.
[Feldman, U.] Artep Inc, Ellicott City, MD 21042 USA.
RP Kramida, A (reprint author), Natl Inst Stand & Technol, Gaithersburg, MD 20889 USA.
EM alexander.kramida@nist.gov
OI Kramida, Alexander/0000-0002-0788-8087
FU Office of Fusion Energy Sciences of the US Department of Energy;
National Aeronautics and Space Administration
FX We are grateful to G Nave and C Sansonetti for their assistance in
conducting this research and to Yu Ralchenko for helpful discussions and
help in modeling the line intensities. The work at NIST was supported in
part by the Office of Fusion Energy Sciences of the US Department of
Energy and by the National Aeronautics and Space Administration. The NRL
portion of this work was supported in part by the NASA-funded part of
the EIS Solar B program.
NR 39
TC 3
Z9 3
U1 0
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
J9 PHYS SCRIPTA
JI Phys. Scr.
PD FEB
PY 2012
VL 85
IS 2
AR 025303
DI 10.1088/0031-8949/85/02/025303
PG 8
WC Physics, Multidisciplinary
SC Physics
GA 894EW
UT WOS:000300410800017
ER
PT J
AU Boris, DR
Fernsler, RF
Walton, SG
AF Boris, D. R.
Fernsler, R. F.
Walton, S. G.
TI A comparative study of dc biased RF impedance probes and Langmuir probes
for the measurement of processing plasma parameters
SO PLASMA SOURCES SCIENCE & TECHNOLOGY
LA English
DT Article
ID ELECTRON-DENSITY; RESONANCE PROBE; ABSORPTION
AB In this work, we compare measurements of electron density (n(e)), plasma potential (phi(p)), electron temperature (T-e), and electron energy distribution function (EEDF or f(E)) made with a dc biased RF probe and a Langmuir probe. The measurements show good agreement between the two probes across an order of magnitude in plasma density.
C1 [Boris, D. R.; Fernsler, R. F.; Walton, S. G.] USN, Res Lab, Charge Particle Phys Branch Code 6752, Div Plasma Phys, Washington, DC 20375 USA.
RP Boris, DR (reprint author), USN, Res Lab, Charge Particle Phys Branch Code 6752, Div Plasma Phys, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM david.boris@nrl.navy.mil
FU Naval Research Laboratory
FX The authors thank the Naval Research Laboratory Base Program for
supporting this research effort. In addition the authors thank the
National Research Council, as this work was carried out while DRB held a
National Research Council Research Associateship Award at the Naval
Research Laboratory.
NR 18
TC 2
Z9 2
U1 2
U2 9
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0963-0252
J9 PLASMA SOURCES SCI T
JI Plasma Sources Sci. Technol.
PD FEB
PY 2012
VL 21
IS 1
AR 015011
DI 10.1088/0963-0252/21/1/015011
PG 6
WC Physics, Fluids & Plasmas
SC Physics
GA 893XL
UT WOS:000300390900012
ER
PT J
AU Lim, AA
Allam, KA
Taneja, R
Kawamoto, HK
AF Lim, Alan A.
Allam, Karam A.
Taneja, Rashimi
Kawamoto, Henry K.
TI Construction of the Philtral Column Using Palmaris Longus Tendon
SO PLASTIC AND RECONSTRUCTIVE SURGERY
LA English
DT Letter
ID SECONDARY CLEFT-LIP
C1 [Kawamoto, Henry K.] Univ Calif Los Angeles, Med Ctr, Div Plast & Reconstruct Surg, Santa Monica, CA 90404 USA.
[Lim, Alan A.] USN, Med Ctr Portsmouth, Dept Plast & Reconstruct Surg, Portsmouth, VA USA.
[Allam, Karam A.] Sohag Univ, Dept Plast Surg, Sohag, Egypt.
[Taneja, Rashimi] Fortis Fit Lt Rajan Dhali Hosp, New Delhi, India.
RP Kawamoto, HK (reprint author), Univ Calif Los Angeles, Med Ctr, Div Plast & Reconstruct Surg, 1301 20th St,Suite 460, Santa Monica, CA 90404 USA.
EM kawamoto@ucla.edu
NR 5
TC 3
Z9 4
U1 0
U2 2
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0032-1052
J9 PLAST RECONSTR SURG
JI Plast. Reconstr. Surg.
PD FEB
PY 2012
VL 129
IS 2
BP 374E
EP 375E
DI 10.1097/PRS.0b013e31823af008
PG 2
WC Surgery
SC Surgery
GA 891TR
UT WOS:000300240000034
PM 22286469
ER
PT J
AU Kasper, MR
Blair, PJ
Touch, S
Sokhal, B
Yasuda, CY
Williams, M
Richards, AL
Burgess, TH
Wierzba, TF
Putnam, SD
AF Kasper, Matthew R.
Blair, Patrick J.
Touch, Sok
Sokhal, Buth
Yasuda, Chadwick Y.
Williams, Maya
Richards, Allen L.
Burgess, Timothy H.
Wierzba, Thomas F.
Putnam, Shannon D.
TI Infectious Etiologies of Acute Febrile Illness among Patients Seeking
Health Care in South-Central Cambodia
SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
LA English
DT Article
ID POLYMERASE-CHAIN-REACTION; SENTINEL SURVEILLANCE; IMMUNOGLOBULIN-M;
UNKNOWN ORIGIN; SPOTTED-FEVER; DENGUE VIRUS; INFLUENZA; HEPATITIS;
CHILDREN; EPIDEMIOLOGY
AB The agents of human febrile illness can vary by region and country suggesting that diagnosis, treatment, and control programs need to be based on a methodical evaluation of area-specific etiologies. From December 2006 to December 2009, 9,997 individuals presenting with acute febrile illness at nine health care clinics in south-central Cambodia were enrolled in a study to elucidate the etiologies. Upon enrollment, respiratory specimens, whole blood, and serum were collected. Testing was performed for viral, bacterial, and parasitic pathogens. Etiologies were identified in 38.0% of patients. Influenza was the most frequent pathogen, followed by dengue, malaria, and bacterial pathogens isolated from blood culture. In addition, 3.5% of enrolled patients were infected with more than one pathogen. Our data provide the first systematic assessment of the etiologies of acute febrile illness in south-central Cambodia. Data from syndromic-based surveillance studies can help guide public health responses in developing nations.
C1 [Kasper, Matthew R.] USN, Dept Bacteriol, Med Res Unit 6, Lima, Peru.
[Blair, Patrick J.] USN, Hlth Res Ctr, San Diego, CA 92152 USA.
[Touch, Sok] Communicable Dis Control Dept, Phnom Penh, Cambodia.
[Sokhal, Buth] Natl Inst Publ Hlth, Phnom Penh, Cambodia.
[Yasuda, Chadwick Y.] USN, Med Res Unit 2, Phnom Penh, Cambodia.
[Williams, Maya] USN, Dept Virol, Med Res Unit 6, Lima, Peru.
[Richards, Allen L.] USN, Med Res Ctr, Silver Spring, MD USA.
[Burgess, Timothy H.] Uniformed Serv Univ Hlth Sci, Infect Dis Clin Res Program, Bethesda, MD 20814 USA.
[Wierzba, Thomas F.] Int Vaccine Inst, Seoul, South Korea.
RP Kasper, MR (reprint author), USN, Dept Bacteriol, Med Res Unit 6, Unit 3230,DPO,AA 34031, Lima, Peru.
EM matthew.kasper@med.navy.mil; Patrick.blair@med.navy.mil;
touch358@moh.gov.kh; buthsokhal@yahoo.com; chad@namru2.org.kh;
Maya.williams@med.navy.mil; Allen.Richards@med.navy.mil;
thurgess@idcrp.org; twierzba@ivi.int; Shan.putnam@med.navy.mil
RI Valle, Ruben/A-7512-2013
FU U.S. Department of Defense Global Emerging Infectious Systems
(DoD-GEIS); U.S. Department of State; U.S. Centers for Disease Control
and Prevention
FX This work was funded by the U.S. Department of Defense Global Emerging
Infectious Systems (DoD-GEIS), the Biosecurity Engagement Program, U.S.
Department of State, and the U.S. Centers for Disease Control and
Prevention.; We are grateful to the clinicians and medical staff at the
field sites in Cambodia for their assistance in enrolling and sampling
patients. We thank laboratory personnel and field staff of NAMRU2-Phnom
Penh for the conduct of work performed in support of this study.
NR 32
TC 35
Z9 36
U1 1
U2 8
PU AMER SOC TROP MED & HYGIENE
PI MCLEAN
PA 8000 WESTPARK DR, STE 130, MCLEAN, VA 22101 USA
SN 0002-9637
J9 AM J TROP MED HYG
JI Am. J. Trop. Med. Hyg.
PD FEB
PY 2012
VL 86
IS 2
BP 246
EP 253
DI 10.4269/ajtmh.2012.11-0409
PG 8
WC Public, Environmental & Occupational Health; Tropical Medicine
SC Public, Environmental & Occupational Health; Tropical Medicine
GA 886PQ
UT WOS:000299866700014
PM 22302857
ER
PT J
AU Brasier, AR
Ju, H
Garcia, J
Spratt, HM
Victor, SS
Forshey, BM
Halsey, ES
Comach, G
Sierra, G
Blair, PJ
Rocha, C
Morrison, AC
Scott, TW
Bazan, I
Kochel, TJ
AF Brasier, Allan R.
Ju, Hyunsu
Garcia, Josefina
Spratt, Heidi M.
Victor, Sundar S.
Forshey, Brett M.
Halsey, Eric S.
Comach, Guillermo
Sierra, Gloria
Blair, Patrick J.
Rocha, Claudio
Morrison, Amy C.
Scott, Thomas W.
Bazan, Isabel
Kochel, Tadeusz J.
CA Venezuelan Dengue Fever Working
TI A Three-Component Biomarker Panel for Prediction of Dengue Hemorrhagic
Fever
SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
LA English
DT Article
ID DISEASE SEVERITY; INFECTION; VIRUS; CHILDREN; AMERICA; ILLNESS; CELLS
AB Dengue virus infections are a major cause of morbidity in tropical countries. Early detection of dengue hemorrhagic fever (DHF) may help identify individuals that would benefit from intensive therapy. Predictive modeling was performed using 11 laboratory values of 51 individuals (38 DIP and 13 DHF) obtained on initial presentation using logistic regression. We produced a robust model with an area under the curve of 0.9615 that retained IL-10 levels, platelets, and lymphocytes as the major predictive features. A classification and regression tree was developed on these features that were 86% accurate on cross-validation. The IL-.10 levels and platelet counts were also identified as the most informative features associated with DHF using a Random Forest classifier. In the presence of polymerase chain reaction-proven acute dengue infections, we suggest a complete blood count and rapid measurement of IL-10 can assist in the triage of potential DHF cases for close follow-up or clinical intervention improving clinical outcome.
C1 [Brasier, Allan R.] UTMB, Dept Internal Med, Galveston, TX 77555 USA.
[Ju, Hyunsu; Spratt, Heidi M.] UTMB, Dept Prevent Med & Community Hlth, Galveston, TX 77555 USA.
[Garcia, Josefina; Forshey, Brett M.; Halsey, Eric S.; Rocha, Claudio] US Naval Med Res Unit Six Unit 3230, Dpo Aa, FL USA.
[Victor, Sundar S.] UTMB, Dept Biochem & Mol Biol, Galveston, TX 77555 USA.
[Comach, Guillermo; Sierra, Gloria; Bazan, Isabel] Univ Carabobo, Inst Invest Biomed, Estado Aragua, Venezuela.
[Blair, Patrick J.] USN, Hlth Res Ctr, San Diego, CA 92152 USA.
[Morrison, Amy C.; Scott, Thomas W.] Univ Calif Davis, Dept Entomol, Davis, CA 95616 USA.
[Kochel, Tadeusz J.] USN, Viral & Rickettsial Dis Dept, Med Res Ctr, Silver Spring, MD USA.
RP Brasier, AR (reprint author), UTMB, Dept Internal Med, MRB 8-128,301 Univ Blvd, Galveston, TX 77555 USA.
EM arbrasie@utmb.edu; hyju@utmb.edu; Josefina.Garcia@med.navy.mil;
hespratt@utmb.edu; ssvictor@utmb.edu; brett.forshey@gmail.com;
Eric.halsey@med.navy.mil; gcomach@cantv.net; gmsierrac@yahoo.com;
Patrick.Blair@med.navy.mil; claudio.rocha@med.navy.mil;
amy.aegypti@gmail.com; twscott@ucdavis.edu; isabelbazana@gmail.com;
Tad.kochel@med.navy.mil
RI Valle, Ruben/A-7512-2013
FU NIH/NIAID Clinical Proteomics Center [HHSN272200800048C, 1U54RR02614
UTMB CTSA]; Military Infectious Diseases Research Program work unit
[6000RAD1.S.B0302]
FX This work was supported by the NIH/NIAID Clinical Proteomics Center,
HHSN272200800048C (ARB), 1U54RR02614 UTMB CTSA (ARB) and the Military
Infectious Diseases Research Program work unit 6000RAD1.S.B0302.
NR 28
TC 25
Z9 26
U1 0
U2 4
PU AMER SOC TROP MED & HYGIENE
PI MCLEAN
PA 8000 WESTPARK DR, STE 130, MCLEAN, VA 22101 USA
SN 0002-9637
J9 AM J TROP MED HYG
JI Am. J. Trop. Med. Hyg.
PD FEB
PY 2012
VL 86
IS 2
BP 341
EP 348
DI 10.4269/ajtmh.2012.11-0460
PG 8
WC Public, Environmental & Occupational Health; Tropical Medicine
SC Public, Environmental & Occupational Health; Tropical Medicine
GA 886PQ
UT WOS:000299866700029
PM 22302872
ER
PT J
AU Maina, AN
Knobel, DL
Jiang, J
Halliday, J
Feikin, DR
Cleaveland, S
Ng'ang'a, Z
Junghae, M
Breiman, RF
Richards, AL
Njenga, MK
AF Maina, Alice N.
Knobel, Darryn L.
Jiang, Ju
Halliday, Jo
Feikin, Daniel R.
Cleaveland, Sarah
Ng'ang'a, Zipporah
Junghae, Muthoni
Breiman, Robert F.
Richards, Allen L.
Njenga, M. Kariuki
TI Rickettsia fells Infection in Febrile Patients, Western Kenya, 2007-2010
SO EMERGING INFECTIOUS DISEASES
LA English
DT Article
ID SUB-SAHARAN AFRICA; SPOTTED-FEVER; TUNISIA; TYPHUS; FELIS
AB To determine previous exposure and incidence of rickettsial infections in western Kenya during 2007-2010, we conducted hospital-based surveillance. Antibodies against rickettsiae were detected in 57.4% of previously collected serum samples. In a 2008-2010 prospective study, Rickettsia felis DNA was 2.2x more likely to be detected in febrile than in afebrile persons.
C1 [Maina, Alice N.; Ng'ang'a, Zipporah] Jomo Kenyatta Univ Agr & Technol, Nairobi, Kenya.
[Maina, Alice N.; Knobel, Darryn L.] Kenya Govt Med Res Ctr, Kisumu, Kenya.
[Knobel, Darryn L.] Univ Pretoria, Onderstepoort, South Africa.
[Jiang, Ju; Richards, Allen L.] USN, Med Res Ctr, Silver Spring, MD USA.
[Halliday, Jo; Cleaveland, Sarah] Univ Glasgow, Glasgow, Lanark, Scotland.
[Feikin, Daniel R.; Junghae, Muthoni; Breiman, Robert F.; Njenga, M. Kariuki] US Ctr Dis Control & Prevent, Nairobi, Kenya.
RP Njenga, MK (reprint author), Ctr Dis Control & Prevent Global Dis Detect, 2239 St Johns Pl, Woodbury, MN 55129 USA.
EM knjenga@ke.cdc.gov
FU US State Department Biosecurity Engagement; Wellcome Trust UK
[081828/B/06/Z]; US Centers for Disease Control and Prevention; US
Department of Defense Global Emerging Infections Surveillance and
Response System Program
FX This research was supported by the US State Department Biosecurity
Engagement Program, Wellcome Trust UK (grant no. 081828/B/06/Z), the US
Centers for Disease Control and Prevention, and the US Department of
Defense Global Emerging Infections Surveillance and Response System
Program.
NR 15
TC 34
Z9 35
U1 0
U2 6
PU CENTERS DISEASE CONTROL
PI ATLANTA
PA 1600 CLIFTON RD, ATLANTA, GA 30333 USA
SN 1080-6040
J9 EMERG INFECT DIS
JI Emerg. Infect. Dis
PD FEB
PY 2012
VL 18
IS 2
BP 328
EP 331
DI 10.3201/eid1802.111372
PG 4
WC Immunology; Infectious Diseases
SC Immunology; Infectious Diseases
GA 889MU
UT WOS:000300078600025
PM 22304807
ER
PT J
AU Haque, A
Arnaud, F
Teranishi, K
Okada, T
Kim, B
Moon-Massat, PF
Auker, C
McCarron, R
Freilich, D
Scultetus, AH
AF Haque, Ashraful
Arnaud, Francoise
Teranishi, Kohsuke
Okada, Tomoaki
Kim, Bobby
Moon-Massat, Paula F.
Auker, Charles
McCarron, Richard
Freilich, Daniel
Scultetus, Anke H.
TI Pre-hospital Resuscitation with HBOC-201 and rFVIIa Compared to HBOC-201
Alone in Uncontrolled Hemorrhagic Shock in Swine
SO ARTIFICIAL CELLS BLOOD SUBSTITUTES AND BIOTECHNOLOGY
LA English
DT Article
DE hemorrhage; resuscitation; pre-hospital trauma care; HBOC-201; rFVIIa
ID ACTIVATED FACTOR-VII; RECOMBINANT FACTOR VIIA; TRAUMATIC BRAIN-INJURY;
POLYMERIZED HEMOGLOBIN HBOC-201; DECREASES BLOOD-LOSS; V LIVER-INJURIES;
OXYGEN CARRIER; NONCOAGULOPATHIC PIGS; DELAYED EVACUATION; COAGULOPATHY
AB In a previous dose escalation study our group found that combining 90 mu g/kg rFVIIa with HBOC-201 reduced blood loss and improved physiologic parameters compared to HBOC alone. In this follow-up study in a swine liver injury model, we found that while there were no adverse hematology effects and trends observed in the previous study were confirmed, statistical significance could not be reached. Additional pre-clinical studies are indicated to identify optimal components of a multifunctional blood substitute for clinical use in trauma.
C1 [Haque, Ashraful; Arnaud, Francoise; Teranishi, Kohsuke; Okada, Tomoaki; Kim, Bobby; Moon-Massat, Paula F.; Auker, Charles; McCarron, Richard; Freilich, Daniel; Scultetus, Anke H.] USN, Med Res Ctr, Operat & Undersea Med Directorate, NeuroTrauma Dept, Silver Spring, MD 20910 USA.
[Arnaud, Francoise; Scultetus, Anke H.] Uniformed Serv Univ Hlth Sci, Dept Surg, Bethesda, MD 20814 USA.
[Auker, Charles] Uniformed Serv Univ Hlth Sci, Dept Mil & Emergency Med, Bethesda, MD 20814 USA.
[Auker, Charles] Uniformed Serv Univ Hlth Sci, Dept Neurol, Bethesda, MD 20814 USA.
RP Haque, A (reprint author), USN, Med Res Ctr, Operat & Undersea Med Directorate, NeuroTrauma Dept, 503 Robert Grant Ave, Silver Spring, MD 20910 USA.
EM ashraful.haque@med.navy.mil
FU BUMED Core Capability Funding Work Unit [602236N.4426.W26.A0241]
FX This work was supported by BUMED Core Capability Funding Work Unit
Number 602236N.4426.W26.A0241.
NR 27
TC 0
Z9 1
U1 2
U2 3
PU INFORMA HEALTHCARE
PI LONDON
PA TELEPHONE HOUSE, 69-77 PAUL STREET, LONDON EC2A 4LQ, ENGLAND
SN 1073-1199
J9 ARTIF CELL BLOOD SUB
JI Artif. Cells Blood Substit. Biotechnol.
PD FEB
PY 2012
VL 40
IS 1-2
BP 44
EP 55
DI 10.3109/10731199.2011.585615
PG 12
WC Biotechnology & Applied Microbiology; Engineering, Biomedical; Materials
Science, Biomaterials
SC Biotechnology & Applied Microbiology; Engineering; Materials Science
GA 884HW
UT WOS:000299696500006
PM 21806503
ER
PT J
AU Hartkopf, WI
Tokovinin, A
Mason, BD
AF Hartkopf, William I.
Tokovinin, Andrei
Mason, Brian D.
TI SPECKLE INTERFEROMETRY AT SOAR IN 2010 AND 2011: MEASURES, ORBITS, AND
RECTILINEAR FITS
SO ASTRONOMICAL JOURNAL
LA English
DT Article
DE binaries: general; techniques: interferometric
ID VISUAL BINARY STARS; PHASES DIFFERENTIAL ASTROMETRY; LINED SPECTROSCOPIC
BINARIES; PROPER-MOTION STARS; ADAPTIVE OPTICS; RECALCULATED ORBITS;
RADIAL-VELOCITY; SYSTEM MASSES; 1ST ORBITS; CD-ROM
AB We report on the results of speckle observations at the 4.1 m SOAR telescope in 2010 and 2011. A total of 639 objects were observed. We give 562 measurements of 418 resolved binaries, including 21 pairs resolved for the first time, and upper detection limits for 221 unresolved stars. New orbital elements have been determined for 42 physical pairs, of which 22 are first-time calculations; the rest are corrections, sometimes substantial. Linear elements are calculated for nine apparently optical doubles. We comment on new pairs, new orbital solutions, and other remarkable objects.
C1 [Hartkopf, William I.; Mason, Brian D.] USN Observ, Washington, DC 20392 USA.
[Tokovinin, Andrei] Cerro Tololo Interamer Observ, La Serena, Chile.
RP Hartkopf, WI (reprint author), USN Observ, 3450 Massachusetts Ave, Washington, DC 20392 USA.
EM wih@usno.navy.mil; atokovinin@ctio.noao.edu; bdm@usno.navy.mil
OI Tokovinin, Andrei/0000-0002-2084-0782
FU National Aeronautics and Space Administration through the Terrestrial
Planet Finder Foundation [NNH06AD70I]; U. S. Naval Observatory
FX The USNO speckle interferometry program has been supported by the
National Aeronautics and Space Administration under grant no.
NNH06AD70I, issued through the Terrestrial Planet Finder Foundation
Science program. This research has made use of the SIMBAD database,
operated at CDS, Strasbourg, France. Thanks are also extended to Ken
Johnston and the U. S. Naval Observatory for their continued support of
the Double Star Program.
NR 144
TC 40
Z9 40
U1 0
U2 1
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 FEB
PY 2012
VL 143
IS 2
AR 42
DI 10.1088/0004-6256/143/2/42
PG 19
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 885TL
UT WOS:000299803600017
ER
PT J
AU Reini, SA
Fothergill, DM
Gasier, HG
Horn, WG
AF Reini, Seth A.
Fothergill, David M.
Gasier, Heath G.
Horn, Wayne G.
TI Propranolol's Potential to Increase Survival Time in a Disabled
Submarine
SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE
LA English
DT Article
DE propranolol; submarine; survival; carbon dioxide; cardiac output
ID BETA-ADRENERGIC-BLOCKADE; CARDIAC-OUTPUT; HEALTHY-MEN; EXERCISE;
HYPERTENSION; ANXIETY
AB REINI SA, FOTHERGILL DM, GASIER HG, HORN WG. Propranolol's potential to increase survival time in a disabled submarine. Aviat Space Environ Med 2012; 83:131-5.
Background: While awaiting rescue from a disabled submarine, survivors will likely endure an atmosphere of rising CO2 that will result in CO2 toxicity once the available emergency CO2 scrubbing materials are exhausted. Propranolol is a p-blocker that may increase survival time by reducing metabolic CO2 production ((V)over dotCO(2)). The purpose of this study was to determine if propranolol reduces resting (V)over dotCO(2) in healthy men. Methods: Eight healthy men completed a counterbalanced, randomized, placebo-controlled, double-blinded crossover study in which each subject received propranolol (40 mg twice daily) or placebo (lactose pill twice daily) over 72 h. The alternate condition was separated by a minimum 96-h washout period. Resting (V)over dotCO(2), oxygen consumption ((V)over dotCO(2)), ventilation ((V)over dot), respiration rate (RR), respiratory exchange ratio (RER), mean arterial pressure (MAP), heart rate (HR), and cardiac output ((Q)over dot) were measured each morning and afternoon. Results: When compared to placebo, propranolol significantly reduced (V)over dotCO(2) (-6.5%), MAP (-3.6%), HR (-10.4%), and 0 (-8.2%); however, there were no significant differences in (V)over dotCO(2), RR, (V)over dot, or RER. Discussion: These results show that 40 mg of propranolol taken twice daily reduces resting (V)over dotCO(2) in healthy men and suggests that this treatment strategy may increase survival time in a disabled submarine scenario.
C1 [Reini, Seth A.; Fothergill, David M.; Gasier, Heath G.; Horn, Wayne G.] USN, Submarine Med Res Lab, Groton, CT USA.
RP Reini, SA (reprint author), 825 5th Ave,Apt 302, San Diego, CA 92101 USA.
EM seth.reini@med.navy.mil
NR 20
TC 1
Z9 1
U1 0
U2 2
PU AEROSPACE MEDICAL ASSOC
PI ALEXANDRIA
PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 USA
SN 0095-6562
J9 AVIAT SPACE ENVIR MD
JI Aviat. Space Environ. Med.
PD FEB
PY 2012
VL 83
IS 2
BP 131
EP 135
DI 10.3357/ASEM.3136.2012
PG 5
WC Public, Environmental & Occupational Health; Medicine, General &
Internal; Sport Sciences
SC Public, Environmental & Occupational Health; General & Internal
Medicine; Sport Sciences
GA 880IF
UT WOS:000299400100007
PM 22303592
ER
PT J
AU Gerke, TL
Scheckel, KG
Ray, RI
Little, BJ
AF Gerke, T. L.
Scheckel, K. G.
Ray, R. I.
Little, B. J.
TI Can Dynamic Bubble Templating Play a Role in Corrosion Product
Morphology?
SO CORROSION
LA English
DT Article
DE iron; mu-x-ray diffraction; mu-x-ray fluorescence mapping; morphologies;
tube-shaped corrosion
ID WATER DISTRIBUTION-SYSTEM; IRON PIPE CORROSION; CAST-IRON;
DISSOLVED-OXYGEN; SCALES; RELEASE; TUBERCLES; GROWTH
AB Dynamic templating as a result of cathodic hydrogen gas production is suggested as a possible mechanism for the formation of tube-like corrosion products on an unlined cast iron pipe in a drinking water distribution system. Mounds of corrosion product, with protruding tubes and freestanding tubes, were observed within a single 30 cm section of piping. Internal morphologies for all shapes were texturally complex although mineralogically simple, composed of two iron oxide/oxyhydroxides minerals: alpha-FeOOH (goethite) and Fe3O4 (magnetite). Static templating by either microorganisms or minerals was rejected as a possible mechanism for tube formation in this study.
C1 [Gerke, T. L.] Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA.
[Scheckel, K. G.] US EPA, ORD, NRMRL, Cincinnati, OH 45268 USA.
[Ray, R. I.; Little, B. J.] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Gerke, TL (reprint author), Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA.
EM Tammie.Gerke@uc.edu
RI Scheckel, Kirk/C-3082-2009
OI Scheckel, Kirk/0000-0001-9326-9241
FU U.S. Department of Energy (DOE) - Basic Energy Sciences; NSERC;
University of Washington; Simon Fraser University; Advanced Photon
Source; U.S. DOE [DE-AC02-06CH11357]; ONR [61153N, NRL/JA/7330-11-0717]
FX PNC/XOR facilities at the Advanced Photon Source, and research at these
facilities, are supported by the U.S. Department of Energy (DOE) - Basic
Energy Sciences, a major facilities access grant from NSERC, the
University of Washington, Simon Fraser University, and the Advanced
Photon Source. Use of the Advanced Photon Source, an Office of Science
User Facility operated for the U.S. DOE Office of Science by Argonne
National Laboratory, was supported by the U.S. DOE under Contract no.
DE-AC02-06CH11357. We thank S.A. Walley and J.B. Maynard for insightful
comments on earlier versions of this paper, M.K. DeSantis for digital
images of the iron corrosion products, and A. Lane (ELE, Inc.) for
graphic support. The work at NRL was supported by ONR program elements
61153N, NRL/JA/7330-11-0717. The opinions expressed in this paper are
those of the author(s) and do not necessarily reflect the official
positions and policies of the USEPA. Any mention of product or trade
names does not constitute recommendation for use by the USEPA.
NR 30
TC 1
Z9 1
U1 1
U2 9
PU NATL ASSOC CORROSION ENG
PI HOUSTON
PA 1440 SOUTH CREEK DRIVE, HOUSTON, TX 77084-4906 USA
SN 0010-9312
J9 CORROSION
JI Corrosion
PD FEB
PY 2012
VL 68
IS 2
AR 025004
DI 10.5006/1.3683226
PG 7
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 882CS
UT WOS:000299539600005
ER
PT J
AU Sharma, S
Shi, Y
Hou, YT
Sherali, HD
Kompella, S
Midkiff, SF
AF Sharma, Sushant
Shi, Yi
Hou, Y. Thomas
Sherali, Hanif D.
Kompella, Sastry
Midkiff, Scott F.
TI Joint Flow Routing and Relay Node Assignment in Cooperative Multi-Hop
Networks
SO IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
LA English
DT Article
DE Cooperative communications; flow routing; relay assignment; multi-hop;
wireless network
ID AD HOC NETWORKS; WIRELESS NETWORKS; DIVERSITY; THROUGHPUT; STRATEGIES;
ALLOCATION
AB It has been shown that cooperative communications (CC) has the potential to significantly increase the capacity of wireless networks. However, most of the existing results are limited to single-hop wireless networks. To explore the behavior of CC in multi-hop wireless networks, we study a joint optimization problem of relay node assignment and flow routing for a group of sessions. We develop a mathematical model and propose a solution procedure based on the branch-and-bound framework augmented with cutting planes (BB-CP). We design several novel components to speed-up the computational time of BB-CP. Via numerical results, we show the potential rate gain that can be achieved by incorporating CC in multi-hop networks.
C1 [Sharma, Sushant] Brookhaven Natl Lab, Upton, NY 11705 USA.
[Sharma, Sushant; Shi, Yi; Hou, Y. Thomas; Sherali, Hanif D.; Midkiff, Scott F.] Virginia Tech, Blacksburg, VA 24061 USA.
[Kompella, Sastry] USN, Res Lab, Washington, DC 20375 USA.
RP Sharma, S (reprint author), Brookhaven Natl Lab, Upton, NY 11705 USA.
EM sushant@bnl.gov; yshi@vt.edu; thou@vt.edu; han-ifs@vt.edu;
sastry.kompella@nrl.navy.mil; midkiff@vt.edu
OI Midkiff, Scott/0000-0003-4933-7360
FU NSF [CNS-1064953]; ONR
FX The work of Y.T. Hou, H.D. Sherali, and S.F. Midkiff was supported in
part by NSF under grant CNS-1064953. The work of S. Kompella was
supported in part by the ONR.
NR 24
TC 15
Z9 16
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0733-8716
J9 IEEE J SEL AREA COMM
JI IEEE J. Sel. Areas Commun.
PD FEB
PY 2012
VL 30
IS 2
BP 254
EP 262
DI 10.1109/JSAC.2012.120203
PG 9
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 881TL
UT WOS:000299512000003
ER
PT J
AU Prasarn, ML
Baria, D
Milne, E
Latta, L
Sukovich, W
AF Prasarn, Mark L.
Baria, Dinah
Milne, Edward
Latta, Loren
Sukovich, William
TI Adjacent-level biomechanics after single versus multilevel cervical
spine fusion Laboratory investigation
SO JOURNAL OF NEUROSURGERY-SPINE
LA English
DT Article
DE cervical spine; adjacent level disease; multilevel fusion; fusion;
arthrodesis; biomechanics; segmental motion
ID INTRADISCAL PRESSURE; ANTERIOR DISKECTOMY; SEGMENTAL MOTION; INTERBODY
FUSION; DISC DISEASE; FOLLOW-UP; ARTHRODESIS; RADICULOPATHY;
DISLOCATIONS; MYELOPATHY
AB Object. Previous studies have demonstrated that patients with spinal fusion are at greater risk for adjacent-segment disease and require additional surgery. It has been postulated that excessive motion of a given motion segment unit (MSU) leads to an increased risk of disc degeneration. It is the authors' hypothesis that a greater increase in adjacent-segment motion will be observed following a 2-level versus a single-level anterior cervical discectomy and instrumented fusion (ACDF). Therefore, they undertook this study to determine the effect of single-level versus 2-level ACDF on the biomechanics of adjacent MSUs.
Methods. Ten fresh-frozen human cervical spines were used in this study. The specimens were potted at C-4 and T-1 and tested in flexion and extension. Range of motion (ROM) was 30 degrees of flexion and 15 degrees of extension at a maximum load of 50 N. The specimens were tested intact and then were randomized into 2 groups of 5 specimens each. Group I underwent a single-level ACDF at the C5-6 level first, and Group 2 underwent the procedure at the C6-7 level. After testing, both groups had the fusion extended to include the C5-7 levels, and the testing was repeated. Changes in overall ROM, stiffness, and segmental motion were calculated and statistically analyzed using a paired Student t-test.
Results. An increase in sagittal ROM of 31.30% above (p = 0.012) and 33.88% below (p = 0.066) the fused MSU was found comparing a 2-level with a 1-level ACDF. The overall stiffness of the entire spinal construct increased 37.34% (p = 0.051) in extension and 30.59% (p = 0.013) in flexion as the second fusion level was added. As expected, the overall sagittal ROM of the entire spinal construct decreased by 13.68% (p = 0.0014) with a 2-level compared with a 1-level fusion.
Conclusions. This study has shown that the biomechanics at adjacent levels to a cervical spine fusion are altered and that there is increased adjacent-segment motion at the levels above and below, after a 2-level compared with a 1-level ACDF. (DOI: 10.3171/2011.10.SPINE11116)
C1 [Prasarn, Mark L.] Univ Miami, Dept Orthopaed, Coral Gables, FL 33124 USA.
[Baria, Dinah] Univ Miami, Dept Biomed Engn, Coral Gables, FL 33124 USA.
[Milne, Edward; Latta, Loren] Mt Sinai Med Ctr, Max Biedermann Inst Biomech, Miami, FL USA.
[Sukovich, William] USN, Med Ctr, Div Spine Surg, Portsmouth, VA USA.
RP Prasarn, ML (reprint author), Univ Texas Med Sch Houston, Dept Orthopaed Surg, 6400 Fannin,Suite 1700, Houston, TX 77030 USA.
EM markprasarn@yahoo.com
FU DePuy Spine
FX Mr. Milne, Dr. Latta, and Dr. Sukovich report receiving clinical or
research support for this study from DePuy Spine. Dr. Sukovich is a
consultant for and has direct stock ownership in NuVasive and has direct
stock ownership in TranS1.
NR 28
TC 24
Z9 27
U1 0
U2 7
PU AMER ASSOC NEUROLOGICAL SURGEONS
PI ROLLING MEADOWS
PA 5550 MEADOWBROOK DRIVE, ROLLING MEADOWS, IL 60008 USA
SN 1547-5654
EI 1547-5646
J9 J NEUROSURG-SPINE
JI J. Neurosurg.-Spine
PD FEB
PY 2012
VL 16
IS 2
BP 172
EP 177
DI 10.3171/2011.10.SPINE11116
PG 6
WC Clinical Neurology; Surgery
SC Neurosciences & Neurology; Surgery
GA 882TA
UT WOS:000299585600012
PM 22136389
ER
PT J
AU Onate, JA
Dewey, T
Kollock, RO
Thomas, KS
Van Lunen, BL
DeMaio, M
Ringleb, SI
AF Onate, James A.
Dewey, Thomas
Kollock, Roger O.
Thomas, Kathleen S.
Van Lunen, Bonnie L.
DeMaio, Marlene
Ringleb, Stacie I.
TI REAL-TIME INTERSESSION AND INTERRATER RELIABILITY OF THE FUNCTIONAL
MOVEMENT SCREEN
SO JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
LA English
DT Article
DE screening; preparticipation examination; functional performance
assessment
ID LOWER-EXTREMITY INJURY; ERROR SCORING SYSTEM; SCHOOL BASKETBALL PLAYERS;
TEST-RETEST RELIABILITY; VISUAL GAIT ANALYSIS; LOW-BACK-PAIN;
CEREBRAL-PALSY; BALANCE; STRENGTH; TESTS
AB Onate, JA, Dewey, T, Kollock, RO, Thomas, KS, Van Lunen, BL, DeMaio, M, and Ringleb, SI. Real-time intersession and interrater reliability of the functional movement screen. J Strength Cond Res 26(2): 408-415, 2012-The purpose of this study was to examine the real-time intersession and interrater reliability of the functional movement screen (FMS). The overall study consisted of 19 volunteer civilians (12 male, 7 female). The intersession reliability consisted of 12 men and 7 women, whereas 10 men and 6 women participated in the interrater reliability test session. Two raters (A and B) were involved in the interrater reliability aspect of this study. The FMS includes 7 tests: deep squat (DS), hurdle step (HS), in-line lunge (IL), shoulder mobility (SM), active straight leg raise (ASLR), trunk stability push-up (TSPU), and rotary stability (RS). Researchers analyzed the data via intraclass correlation (ICC). To determine the reliability of the intersession scoring of the FMS and the intrasession interrater scoring of the FMS a 2-way mixed effects model intraclass correlation coefficient (ICC3,1) was used for the continuous data, whereas a weighted Cohen's kappa (kappa) was used for the categorical data. The dependent variables were FMS total score (0-21 scale) and associated tests were DS, HS, IL, SM, ASLR, TSPU, and RS. Intersession reliability (ICC, SEM) and kappa were as follows: FMS total score (0.92, 0.51), DS (kappa = 0.69), HS (kappa = 0.16), IL (kappa = 0.69), SM (kappa = 0.84), ASLR (kappa = 0.69), TSPU (kappa = 0.77), and RS (no covariance). Interrater reliability (ICC, SEAM and K were as follows: FMS total score (0.98, 0.25), DS (kappa = 1.0), HS (kappa = 0.33), IL (kappa = 0.88), SM (kappa = 0.90), ASLR (kappa = 0.88), TSPU (kappa = 0.75), and RS (no covariance). The FMS total scores displayed high intersession and interrater reliabilities. Finally, with the exception of HS, all tasks displayed moderate to high intersession reliability and good to high interrater reliability.
C1 [Onate, James A.] Ohio State Univ, Sch Allied Med Profess, Columbus, OH 43210 USA.
[Dewey, Thomas; Kollock, Roger O.; Thomas, Kathleen S.; Van Lunen, Bonnie L.] Old Dominion Univ, Dept Human Movement Sci, Norfolk, VA USA.
[DeMaio, Marlene] USN, Med Ctr Portsmouth, Dept Navy, Norfolk, VA USA.
[Ringleb, Stacie I.] Old Dominion Univ, Dept Mech Engn, Norfolk, VA USA.
RP Onate, JA (reprint author), Ohio State Univ, Sch Allied Med Profess, Columbus, OH 43210 USA.
EM onate.2@osu.edu
RI Onate, James/E-3790-2011
NR 50
TC 39
Z9 40
U1 3
U2 42
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 1064-8011
J9 J STRENGTH COND RES
JI J. Strength Cond. Res.
PD FEB
PY 2012
VL 26
IS 2
BP 408
EP 415
PG 8
WC Sport Sciences
SC Sport Sciences
GA 886MD
UT WOS:000299857600012
PM 22266547
ER
PT J
AU Lipov, EG
Navaie, M
Stedje-Larsen, ET
Burkhardt, K
Smith, JC
Sharghi, LH
Hickey, AH
AF Lipov, Eugene G.
Navaie, Maryam
Stedje-Larsen, Eric T.
Burkhardt, Kevin
Smith, Jessica C.
Sharghi, Leighla H.
Hickey, Anita H.
TI A Novel Application of Stellate Ganglion Block: Preliminary Observations
for the Treatment of Post-Traumatic Stress Disorder
SO MILITARY MEDICINE
LA English
DT Editorial Material
ID COMBAT
C1 [Lipov, Eugene G.; Burkhardt, Kevin] Adv Pain Ctr SC, Hoffman Estates, IL 60169 USA.
[Navaie, Maryam; Smith, Jessica C.; Sharghi, Leighla H.] Advance Hlth Solut LLC, La Jolla, CA 92037 USA.
[Stedje-Larsen, Eric T.; Hickey, Anita H.] USN, San Diego Med Ctr, Dept Anesthesiol, San Diego, CA 92134 USA.
RP Lipov, EG (reprint author), Adv Pain Ctr SC, 2260 W Higgins Rd,Suite 101, Hoffman Estates, IL 60169 USA.
NR 8
TC 7
Z9 8
U1 0
U2 0
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
J9 MIL MED
JI Milit. Med.
PD FEB
PY 2012
VL 177
IS 2
BP 125
EP 127
PG 3
WC Medicine, General & Internal
SC General & Internal Medicine
GA 886KC
UT WOS:000299852300002
PM 22360054
ER
PT J
AU Brawley, S
Fairbanks, K
Nguyen, W
Blivin, S
Frantz, E
AF Brawley, Stephen
Fairbanks, Keith
Nguyen, William
Blivin, Steve
Frantz, Earl
TI Sports Medicine Training Room Clinic Model for the Military
SO MILITARY MEDICINE
LA English
DT Article
ID INJURY; RISK
AB A transition from traditional problem-based clinics to the Sports Medicine and Reconditioning Team (SMART) clinic model was completed by January 2009 at Marine Corps Base Camp Lejeune. The SMART clinic model allows for more patients to be seen and enhances coordinated care between providers. The objective of this research is to show the advantages of implementing a training room team approach for the care of musculoskeletal injuries in active duty members by comparing the number of patients seen, the number of limited duty (LIMDU) periods, the number of physical evaluation boards (PEBs), and the percentage of orthopedic referrals. Electronic medical records for patients seen at sports medicine clinics between January 1, 2007 and December 31. 2010 were reviewed. Naval Hospital Camp Lejeune provided a database of patients placed on LIMDU and PEB from 2007 through 2010. Fifty-eight and twenty-four percent more encounters occurred in 2009 and 2010, respectively. than that in 2007. The percentage of LIMDU referred for PEB in 2010 was reduced to 9% compared to that in 2007. In conclusion. the SMART clinic model allows for more patients to be seen and a reduction in the percentage of patients recommended for PEB from LIMDU.
C1 [Brawley, Stephen] US Naval Hosp Naples, Naples, Italy.
[Fairbanks, Keith; Nguyen, William; Blivin, Steve; Frantz, Earl] USN, Dept Family Med, Hosp Camp Lejeune, Camp Lejeune, NC 28547 USA.
RP Brawley, S (reprint author), US Naval Hosp Naples, Naples, Italy.
NR 4
TC 3
Z9 3
U1 0
U2 5
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
J9 MIL MED
JI Milit. Med.
PD FEB
PY 2012
VL 177
IS 2
BP 135
EP 138
PG 4
WC Medicine, General & Internal
SC General & Internal Medicine
GA 886KC
UT WOS:000299852300004
PM 22360056
ER
PT J
AU Ritchie, JV
Horne, ST
Perry, J
Gay, D
AF Ritchie, James V.
Horne, Simon T.
Perry, Jonathan
Gay, David
TI Ultrasound Triage of Ocular Blast Injury in the Military Emergency
Department
SO MILITARY MEDICINE
LA English
DT Article
ID OPEN-GLOBE INJURIES; FOREIGN-BODIES; COMPUTED-TOMOGRAPHY; OPERATIONS
IRAQI; ENDURING FREEDOM; SOFT-TISSUE; ULTRASONOGRAPHY; DIAGNOSIS; PLAIN;
SENSITIVITY
AB Introduction: Ultrasound (US) provides rapid effective assessment of the globe. In Afghanistan, ocular blast injuries are common. We present a case series demonstrating the value of US in this context. Methods: 29 patients with suspected blast eye injury had both computed tomography (CT) of the head and ocular US as part of their standard care in a military hospital in Afghanistan. The US images were assessed by blinded consultants (emergency department and radiology) and compared with the CT reports. Results: 18 patients had an intraocular injury on either CT or US. CT identified 11 injuries. US detected 18, including all 11 detected by CT. Inter-rater agreement was high (28/29). Discussion: This series suggests that US may be as good as CT at detecting ocular blast injuries. However, inability to follow up local national patients meant that the clinical relevance of these findings cannot be quantified. US is likely to have a role on deployed operations in triaging possible ocular injuries. Conclusions: US is an easy, cheap alternative to CT for the assessment of blast injury to the eye. It appears to have identified all injuries detected by CT in this series and can be accurately interpreted by emergency physicians.
C1 [Ritchie, James V.; Gay, David] USN, Med Ctr, Portsmouth, VA 23708 USA.
[Horne, Simon T.] MDHU Derriford, Plymouth PL6 8DH, Devon, England.
[Perry, Jonathan] MDHU Peterborough, Peterborough PE3 9GZ, Cambs, England.
RP Ritchie, JV (reprint author), USN, Med Ctr, Portsmouth, VA 23708 USA.
NR 15
TC 4
Z9 4
U1 0
U2 2
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
J9 MIL MED
JI Milit. Med.
PD FEB
PY 2012
VL 177
IS 2
BP 174
EP 178
PG 5
WC Medicine, General & Internal
SC General & Internal Medicine
GA 886KC
UT WOS:000299852300011
PM 22360063
ER
PT J
AU Mao, CY
Narang, S
Lopreiato, J
AF Mao, Chad Y.
Narang, Sandeep
Lopreiato, Joseph
TI Breastfeeding Practices in Military Families: A 12-Month Prospective
Population-Based Study in the National Capital Region
SO MILITARY MEDICINE
LA English
DT Article
ID HUMAN-MILK; WOMEN; DURATION; MOTHERS
AB Breastfeeding practices in military families have not been widely investigated. The objective of this study was to measure the prevalence and duration of breast feeding among uniformed families and identify factors associated with breastfeeding. We conducted a prospective study of 253 mothers of new infants from July to December 2004. Initial information gathered included demographic data, feeding choices, and intended duration of breastfeeding. Follow-up surveys were conducted until 12 months postpartum. 51%, of mothers were breastfeeding at 6 months and 25% at I year. Mothers on active duty were equally likely to breastfeed than non active duty mothers. Officer mothers were 3 times more likely to breastfeed compared to enlisted mothers (p = 0.005). Mothers with higher education were twice as likely to breast feed longer (p = 0.015). Families participating in Special Supplemental Nutrition Program for Women. Infants. and Children (WIC) were 2.5 times less likely to breastfed at 1 year (p < 0.001). Our study shows a higher percentage of women initiating and maintaining breastfeeding compared to national data, but still less than current American Academy of Pediatrics guidelines. Our study suggests that to improve breastfeeding rates among uniformed families, more attention may need to be directed to younger, enlisted mothers and those families in a lower socioeconomic status or receiving WIC assistance.
C1 [Mao, Chad Y.] USN, San Diego Med Ctr, Dept Pediat, San Diego, CA 92134 USA.
[Narang, Sandeep] Univ Texas Hlth Sci Ctr San Antonio, Dept Pediat, San Antonio, TX 78207 USA.
[Lopreiato, Joseph] Uniformed Serv Univ Hlth Sci, Natl Capital Area Med Simulat Ctr, Bethesda, MD 20814 USA.
RP Mao, CY (reprint author), USN, San Diego Med Ctr, Dept Pediat, 34800 Bob Wilson Dr, San Diego, CA 92134 USA.
NR 29
TC 5
Z9 6
U1 1
U2 4
PU ASSOC MILITARY SURG US
PI BETHESDA
PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 USA
SN 0026-4075
EI 1930-613X
J9 MIL MED
JI Milit. Med.
PD FEB
PY 2012
VL 177
IS 2
BP 229
EP 234
PG 6
WC Medicine, General & Internal
SC General & Internal Medicine
GA 886KC
UT WOS:000299852300020
PM 22360072
ER
PT J
AU Yaremchuk, M
Carrier, M
AF Yaremchuk, Max
Carrier, Matthew
TI On the Renormalization of the Covariance Operators
SO MONTHLY WEATHER REVIEW
LA English
DT Article
ID VARIATIONAL ASSIMILATION; DIFFUSION OPERATOR; HEAT KERNEL; SYSTEM; OCEAN
AB Many background error correlation (BEC) models in data assimilation are formulated in terms of a smoothing operator B, which simulates the action of the correlation matrix on a state vector normalized by respective BE variances. Under such formulation, B has to have a unit diagonal and requires appropriate renormalization by rescaling. The exact computation of the rescaling factors (diagonal elements of B) is a computationally expensive procedure, which needs an efficient numerical approximation.
In this study approximate renormalization techniques based on the Monte Carlo (MC) and Hadamard matrix (HM) methods and on the analytic approximations derived under the assumption of the local homogeneity (LHA) of B are compared using realistic BEC models designed for oceanographic applications. It is shown that although the accuracy of the MC and HM methods can be improved by additional smoothing, their computational cost remains significantly higher than the LHA method, which is shown to be effective even in the zeroth-order approximation. The next approximation improves the accuracy 1.5-2 times at a moderate increase of CPU time. A heuristic relationship for the smoothing scale in two and three dimensions is proposed for the first-order LHA approximation.
C1 [Yaremchuk, Max; Carrier, Matthew] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Yaremchuk, M (reprint author), USN, Res Lab, Bldg 1009, Stennis Space Ctr, MS 39529 USA.
EM max.yaremchuk@nrlssc.navy.mil
FU Office of Naval Research [0602435N]
FX This study was supported by the Office of Naval Research (Program
Element 0602435N).
NR 19
TC 6
Z9 6
U1 0
U2 0
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0027-0644
J9 MON WEATHER REV
JI Mon. Weather Rev.
PD FEB
PY 2012
VL 140
IS 2
BP 637
EP 649
DI 10.1175/MWR-D-11-00139.1
PG 13
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 886JI
UT WOS:000299850300018
ER
PT J
AU Iliopoulos, AP
Michopoulos, JG
Andrianopoulos, NP
AF Iliopoulos, A. P.
Michopoulos, J. G.
Andrianopoulos, N. P.
TI Performance Analysis of the Mesh-Free Random Grid Method for Full-Field
Synthetic Strain Measurements
SO STRAIN
LA English
DT Article
DE digital imaging; displacement measurement; full-field strain
measurement; hole specimen; material characterization; orthotropic;
simulation
ID DIGITAL IMAGE CORRELATION; DEFORMATION FUNCTION; ERRORS
AB In responding to the needs of the material characterization community, the recently developed mesh-free random grid method (MFRGM) has been exhibiting very promising characteristics of accuracy, adaptability, implementation flexibility and efficiency. To address the design specification of the method according to an intended application, we are presenting a sensitivity analysis that aids into determining the effects of the experimental and computational parameters characterizing the MFRGM in terms of its performance. The performance characteristics of the MFRGM are mainly its accuracy, sensitivity, smoothing properties and efficiency. In this paper, we are presenting a classification of a set of parameters associated with the characteristics of the experimental set-up and the random grid applied on the specimen under measurement. The applied sensitivity analysis is based on synthetic images produced from analytic solutions of specific isotropic and orthotropic elasticity boundary value problems. This analysis establishes the trends in the performance characteristics of the MFRGM that will enable the selection of the user controlled variables for a desired performance specification.
C1 [Iliopoulos, A. P.] USN, Sci Applicat Int Corp, Computat Multiphys Syst Lab, Ctr Computat Mat Sci,Res Lab,Code 6934, Washington, DC 20375 USA.
[Michopoulos, J. G.] USN, Computat Multiphys Syst Lab, Ctr Computat Mat Sci, Res Lab,Code 6934, Washington, DC 20375 USA.
[Andrianopoulos, N. P.] Natl Tech Univ Athens, Sch Appl Math & Phys, Sect Mech, GR-15773 Athens, Hellas, Greece.
RP Iliopoulos, AP (reprint author), USN, Sci Applicat Int Corp, Computat Multiphys Syst Lab, Ctr Computat Mat Sci,Res Lab,Code 6934, Washington, DC 20375 USA.
RI Michopoulos, John/D-6704-2016
OI Michopoulos, John/0000-0001-7004-6838
FU Office of Naval Research; NRL [6.1]
FX The authors acknowledge the support by the Office of Naval Research and
by NRL's 6.1 core-program.
NR 31
TC 11
Z9 11
U1 0
U2 5
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0039-2103
J9 STRAIN
JI Strain
PD FEB
PY 2012
VL 48
IS 1
BP 1
EP 15
DI 10.1111/j.1475-1305.2010.00786.x
PG 15
WC Materials Science, Characterization & Testing
SC Materials Science
GA 885MX
UT WOS:000299784200001
ER
PT J
AU Luce-Fedrow, A
Wright, C
Gaff, HD
Sonenshine, DE
Hynes, WL
Richards, AL
AF Luce-Fedrow, Alison
Wright, Chelsea
Gaff, Holly D.
Sonenshine, Daniel E.
Hynes, Wayne L.
Richards, Allen L.
TI In vitro propagation of Candidatus Rickettsia andeanae isolated from
Amblyomma maculatum
SO FEMS IMMUNOLOGY AND MEDICAL MICROBIOLOGY
LA English
DT Article
DE Rickettsia; spotted fever group; Amblyomma
ID FEVER GROUP RICKETTSIA; GULF-COAST TICKS; NORTHERN PERU; PARKERI; CELLS;
MODEL
AB Candidatus Rickettsia andeanae was identified during an investigation of a febrile outbreak in northwestern Peru (2002). DNA sequencing from two ticks (Amblyomma maculatum, Ixodes boliviensis) collected during the investigation revealed a novel Rickettsia agent with similarity to the spotted fever group rickettsiae. Since then, Candidatus R.similar to andeanae has been detected in A.similar to maculatum ticks collected in the southeastern and southcentral United States, Argentina, and Peru. To date, Candidatus R.similar to andeanae has not been successfully cultivated in the laboratory. We present evidence for the continuous cultivation in three cell lines of Candidatus R.similar to andeanae isolated from an A.similar to maculatum tick (Portsmouth, Virginia).
C1 [Richards, Allen L.] USN, Rickettsial Dis Dept, Med Res Ctr, Silver Spring, MD 20910 USA.
[Wright, Chelsea; Gaff, Holly D.; Sonenshine, Daniel E.; Hynes, Wayne L.] Old Dominion Univ, Dept Biol Sci, Coll Sci, Norfolk, VA 23529 USA.
RP Richards, AL (reprint author), USN, Rickettsial Dis Dept, Med Res Ctr, 503 Robert Grant Ave, Silver Spring, MD 20910 USA.
EM allen.richards@med.navy.mil
RI Valle, Ruben/A-7512-2013;
OI Hynes, Wayne/0000-0003-3998-7781
FU Global Emerging Infections Surveillance and Response System; Global
Emerging Infections Surveillance and Response System, a Division of the
Armed Forces Health Surveillance Center [0000188M.0931.001.A0074]
FX This work is supported by the Global Emerging Infections Surveillance
and Response System, a Division of the Armed Forces Health Surveillance
Center; work unit number 0000188M.0931.001.A0074.
NR 16
TC 13
Z9 13
U1 1
U2 3
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0928-8244
J9 FEMS IMMUNOL MED MIC
JI FEMS Immunol. Med. Microbiol.
PD FEB
PY 2012
VL 64
IS 1
SI SI
BP 74
EP 81
DI 10.1111/j.1574-695X.2011.00905.x
PG 8
WC Immunology; Infectious Diseases; Microbiology
SC Immunology; Infectious Diseases; Microbiology
GA 874LA
UT WOS:000298957500011
PM 22098316
ER
PT J
AU Richards, AL
AF Richards, Allen L.
TI Worldwide detection and identification of new and old rickettsiae and
rickettsial diseases
SO FEMS IMMUNOLOGY AND MEDICAL MICROBIOLOGY
LA English
DT Article
DE Rickettsia; Orientia; diagnostic assays; surveillance
ID POLYMERASE-CHAIN-REACTION; SPECIMENS; DIAGNOSIS; TYPHUS; PCR
AB To determine the prevalence and distribution of rickettsial pathogens around the world, scientists have relied more and more upon molecular techniques in addition to serological and culture methods. The ease of use and sensitivity/specificity of molecular techniques such as quantitative real-time PCR assays and multilocus sequence typing have lead to an increase in reports of the detection and identification of new and old rickettsiae in previously known and in new endemic regions. These assays have been successfully used with clinical samples such as serum, blood, and tissue biopsies and with environmental samples such as arthropod vectors including ticks, fleas, lice, and mites, and blood and tissue specimens from small mammal collections and from wild and domestic large animals. These methods have lead to the detection of new and old rickettsial pathogens often in new locations leading investigators to suggest new regions of risk of these rickettsioses.
C1 USN, Med Res Ctr, Rickettsial Dis Res Program, Viral & Rickettsial Dis Dept, Silver Spring, MD 20910 USA.
RP Richards, AL (reprint author), USN, Med Res Ctr, Rickettsial Dis Res Program, Viral & Rickettsial Dis Dept, 503 Robert Grant Ave, Silver Spring, MD 20910 USA.
EM allen.richards@med.navy.mil
RI Valle, Ruben/A-7512-2013
FU Global Emerging Infections Surveillance and Response System, a Division
of the Armed Forces Health Surveillance Center [0000188M.0931.001.A0074]
FX This work is supported by the Global Emerging Infections Surveillance
and Response System, a Division of the Armed Forces Health Surveillance
Center; work unit number is 0000188M.0931.001.A0074.
NR 19
TC 14
Z9 17
U1 0
U2 7
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0928-8244
J9 FEMS IMMUNOL MED MIC
JI FEMS Immunol. Med. Microbiol.
PD FEB
PY 2012
VL 64
IS 1
SI SI
BP 107
EP 110
DI 10.1111/j.1574-695X.2011.00875.x
PG 4
WC Immunology; Infectious Diseases; Microbiology
SC Immunology; Infectious Diseases; Microbiology
GA 874LA
UT WOS:000298957500017
PM 22067055
ER
PT J
AU Gorantla, SK
Kadloor, S
Kiyavash, N
Coleman, TP
Moskowitz, IS
Kang, MH
AF Gorantla, Siva K.
Kadloor, Sachin
Kiyavash, Negar
Coleman, Todd P.
Moskowitz, Ira S.
Kang, Myong H.
TI Characterizing the Efficacy of the NRL Network Pump in Mitigating Covert
Timing Channels
SO IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY
LA English
DT Article
DE Information-theoretic bounds; network security; NRL network pump;
queueing theory; timing channels
ID CAPACITY; FEEDBACK
AB The Naval Research Laboratory (NRL) Network Pump, or Pump, is a standard for mitigating covert channels that arise in a multilevel secure (MLS) system when a high user (HU) sends acknowledgements to a low user (LU). The issue here is that HU can encode information in the "timings" of the acknowledgements. The Pump aims at mitigating the covert timing channel by introducing buffering between HU and LU, as well as adding noise to the acknowledgment timings. We model the working of the Pump in certain situations, as a communication system with feedback and use then this perspective to derive an upper bound on the capacity of the covert channel between HU and LU in the Pump. This upper bound is presented in terms of a directed information flow over the dynamics of the system. We also present an achievable scheme that can transmit information over this channel. When the support of the noise added by Pump to acknowledgment timings is finite, the achievable rate is nonzero, i.e., infinite number of bits can be reliably communicated. If the support of the noise is infinite, the achievable rate is zero and hence a finite number of bits can be communicated.
C1 [Gorantla, Siva K.; Kadloor, Sachin; Kiyavash, Negar; Coleman, Todd P.] Univ Illinois, Coordinated Sci Lab, Urbana, IL 61801 USA.
[Moskowitz, Ira S.; Kang, Myong H.] USN, Ctr High Assurance Comp Syst, Res Lab, Washington, DC 20375 USA.
RP Gorantla, SK (reprint author), Univ Illinois, Coordinated Sci Lab, 1101 W Springfield Ave, Urbana, IL 61801 USA.
EM sgorant2@illinois.edu; kadloor1@illinois.edu; kiyavash@illinois.edu;
colemant@illinois.edu; ira.moskowitz@nrl.navy.mil;
myong.kang@nrl.navy.mil
FU MURI [FA9550-10-1-0573]; Naval Research Laboratory [N00173-09-1-G-033];
National Science Foundation Cybertrust [CNS-08-31488, FA9550-11-1-0016]
FX Manuscript received December 15, 2010; revised May 16, 2011; accepted
July 12, 2011. Date of publication August 01, 2011; date of current
version January 13, 2012. This work was supported by Research Grant MURI
FA9550-10-1-0573, Research Grant from the Naval Research Laboratory
N00173-09-1-G-033, Research Grant from the National Science Foundation
Cybertrust program CNS-08-31488, and Research Grant FA9550-11-1-0016.
The associate editor coordinating the review of this manuscript and
approving it for publication was Prof. Miodrag Potkonjak.
NR 38
TC 5
Z9 5
U1 2
U2 8
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1556-6013
EI 1556-6021
J9 IEEE T INF FOREN SEC
JI IEEE Trans. Inf. Forensic Secur.
PD FEB
PY 2012
VL 7
IS 1
SI SI
BP 64
EP 75
DI 10.1109/TIFS.2011.2163398
PN 1
PG 12
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA 880WA
UT WOS:000299438100007
ER
PT J
AU Haverhals, LM
Sulpizio, HM
Fayos, ZA
Trulove, MA
Reichert, WM
Foley, MP
De Long, HC
Trulove, PC
AF Haverhals, Luke M.
Sulpizio, Hadley M.
Fayos, Zane A.
Trulove, Matthew A.
Reichert, W. Matthew
Foley, Matthew P.
De Long, Hugh C.
Trulove, Paul C.
TI Process variables that control natural fiber welding: time, temperature,
and amount of ionic liquid
SO CELLULOSE
LA English
DT Article
DE Cellulose dissolution; Cellulose fiber; Composite; Ionic liquid; Partial
dissolution
ID ALL-CELLULOSE COMPOSITES; X-RAY-DIFFRACTION; SURFACE SELECTIVE
DISSOLUTION; MICROCRYSTALLINE CELLULOSE; STRUCTURAL-CHANGES; IR
AB A systematic study of variables that affect the fiber welding process is presented. Cotton cloth samples are treated with controlled amounts of 1-ethyl-3-methylimidazolium acetate for a series of times and temperatures. Diluting the ionic liquid with a volatile molecular co-solvent allows temporal and spatial control of the welding process not possible with neat ionic liquids. Materials are characterized by scanning electron microscopy, infrared spectroscopy, X-ray diffraction, and mechanical (tensile) testing. Results suggest careful management of process variables permits controlled, reproducible manipulation of chemical and physical properties.
C1 [Haverhals, Luke M.; Sulpizio, Hadley M.; Fayos, Zane A.; Trulove, Matthew A.; Reichert, W. Matthew; Foley, Matthew P.; Trulove, Paul C.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
[De Long, Hugh C.] USAF, Off Sci Res, Arlington, VA 22203 USA.
RP Trulove, PC (reprint author), USN Acad, Dept Chem, Annapolis, MD 21402 USA.
EM trulove@usna.edu
FU US Air Force Office of Scientific Research; US Naval Academy
FX We are grateful to the US Air Force Office of Scientific Research and US
Naval Academy for funding portions of this work. Any opinions, findings
and conclusions or recommendations expressed in this material are those
of the authors and do not necessarily reflect the views of the US Air
Force or the US Navy.
NR 40
TC 11
Z9 11
U1 4
U2 22
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0969-0239
J9 CELLULOSE
JI Cellulose
PD FEB
PY 2012
VL 19
IS 1
BP 13
EP 22
DI 10.1007/s10570-011-9605-0
PG 10
WC Materials Science, Paper & Wood; Materials Science, Textiles; Polymer
Science
SC Materials Science; Polymer Science
GA 874YN
UT WOS:000298994600002
ER
PT J
AU Sutton, JA
Williams, BA
Fleming, JW
AF Sutton, Jeffrey A.
Williams, Bradley A.
Fleming, James W.
TI Investigation of NCN and prompt-NO formation in low-pressure C1-C4
alkane flames
SO COMBUSTION AND FLAME
LA English
DT Article
DE NO(x); Prompt NO; Low-pressure flames; Laser-induced fluorescence; NO
precursors; NCN
ID CH; MECHANISM; CH+N-2; STATE; KINETICS; PROPANE; METHANE; HCN
AB Temperature, CH, NCN, and NO profiles were measured for eight low-pressure hydrocarbon flames fueled by methane, ethane, propane, and butane using laser-induced fluorescence (LIF) diagnostics. These measurements were used (1) to assess NCN and prompt-NO formation chemistry across a series of fuels of increasing number of carbons at different equivalence ratios (phi, = 1.07 and 1.28); (2) to examine the predictive capabilities of current C1-C4 hydrocarbon and NCN formation/consumption combustion mechanisms on properly capturing prompt-NO formation and (3) to examine the postulation that additional prompt-NO precursors (other than CH) exist for fuels larger than methane. For a given equivalence ratio, the measured peak CH concentration is fairly constant across all four fuels, while both the peak NCN and post-flame NO concentrations steadily increase. Furthermore, it is found that as the fuels increase in number of carbons, i.e., methane to butane, the correlation between the peak NCN and post-flame NO remains high, while the correlation between peak CH and peak NCN and peak CH and post-flame NO becomes increasingly lower. This is especially evident for rich flame cases. The experimental profiles are compared to numerical calculations using two comprehensive kinetic mechanisms suitable for C4 chemistry, where the CH + N(2) --> NCN + H reaction is assumed as the only prompt-NO initiation reaction. For the phi = 1.28 flame cases, CH is over-predicted using both mechanisms for all four fuels and by as much as 60%, while for the phi = 1.07 cases, CH is predicted to within 15% of the experimentally-derived results, although there is some discrepancy concerning the spatial locations of the CH profiles. For both NCN and NO, there is an increasing under-prediction for the phi = 1.28 cases as the fuel increases in number of carbons, while for the phi = 1.07 cases there is a systematic under-prediction of NCN and NO with a weaker (although evident) fuel dependence. From the experimental results and the comparison to modeling predictions, it is apparent that additional work concerning CH formation and consumption kinetics is necessary to accurately capture the CH concentration profiles across a broad range of conditions. Furthermore the comparisons to the modeling predictions using only a single prompt-NO precursor, CH, indicate a reasonable plausibility that (an) additional prompt-NO precursor (s) exist and become important when considering fuels larger than methane, especially under rich flame conditions. Possible precursors in addition to CH are discussed. (C) 2011 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
C1 [Sutton, Jeffrey A.] Ohio State Univ, Dept Mech & Aerosp Engn, Columbus, OH 43210 USA.
[Williams, Bradley A.; Fleming, James W.] USN, Res Lab, Div Chem, Navy Technol Ctr Safety & Survivabil, Washington, DC 20375 USA.
RP Sutton, JA (reprint author), Ohio State Univ, Dept Mech & Aerosp Engn, Columbus, OH 43210 USA.
EM sutton.235@osu.edu
FU Office of Naval Research (ONR) through the Naval Research Laboratory;
National Research Council
FX Portions of this research were supported by the Office of Naval Research
(ONR) through the Naval Research Laboratory core funding. J.A.S.
acknowledges the National Research Council for his support as a
post-doctoral fellow from 2005-2008. The authors thank Daniel Marrinan
for his assistance in preparing the Supplementary material.
NR 36
TC 18
Z9 18
U1 0
U2 18
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 FEB
PY 2012
VL 159
IS 2
BP 562
EP 576
DI 10.1016/j.combustflame.2011.08.023
PG 15
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA 875XJ
UT WOS:000299068200010
ER
PT J
AU Gamezo, VN
Zipf, RK
Sapko, MJ
Marchewka, WP
Mohamed, KM
Oran, ES
Kessler, DA
Weiss, ES
Addis, JD
Karnack, FA
Sellers, DD
AF Gamezo, Vadim N.
Zipf, R. Karl, Jr.
Sapko, Michael J.
Marchewka, Walter P.
Mohamed, Khaled M.
Oran, Elaine S.
Kessler, David A.
Weiss, Eric S.
Addis, James D.
Karnack, Frank A.
Sellers, Donald D.
TI Detonability of natural gas-air mixtures
SO COMBUSTION AND FLAME
LA English
DT Article
DE Methane-air; Detonability limits; Detonation cells
ID GASEOUS DETONATION; SHOCK-WAVES; METHANE; IGNITION; DEFLAGRATIONS;
PROPANE
AB Direct initiation experiments were carried out in a 105 cm diameter tube to study detonation properties and evaluate the detonability limits for mixtures of natural gas (NG) with air. The natural gas was primarily methane with 1.5-1.7% of ethane. A stoichiometric methane-oxygen mixture contained in a large plastic bag was used as a detonation initiator. Self-supporting detonations with velocities and pressures close to theoretical CJ values were observed in NG-air mixtures containing from 5.3% to 15.6% of NG at atmospheric pressure. These detonability limits are wider than previously measured in smaller channels, and close to the flammability limits. Detonation cell patterns recorded near the limits vary from large cells of the size of the tube to spiral traces of spin detonations. Away from the limits, detonation cell sizes decrease to about 20 cm for 10% NG, and are consistent with existing data for methane-air mixtures obtained in smaller channels. Observed cell patterns are very irregular, and contain secondary cell structures inside primary cells and fine structures inside spin traces. Published by Elsevier Inc. on behalf of The Combustion Institute.
C1 [Gamezo, Vadim N.; Oran, Elaine S.; Kessler, David A.] USN, Computat Phys & Fluid Dynam Lab, Res Lab, Washington, DC 20375 USA.
[Zipf, R. Karl, Jr.; Sapko, Michael J.; Marchewka, Walter P.; Mohamed, Khaled M.; Weiss, Eric S.; Addis, James D.; Karnack, Frank A.; Sellers, Donald D.] NIOSH, OMSHR, Pittsburgh, PA 15236 USA.
RP Gamezo, VN (reprint author), USN, Computat Phys & Fluid Dynam Lab, Res Lab, Washington, DC 20375 USA.
EM gamezo@lcp.nrl.navy.mil
NR 40
TC 6
Z9 7
U1 0
U2 19
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 FEB
PY 2012
VL 159
IS 2
BP 870
EP 881
DI 10.1016/j.combustflame.2011.08.009
PG 12
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA 875XJ
UT WOS:000299068200036
ER
PT J
AU Wrage, S
AF Wrage, Stephen
TI Teaching Ethics at a Military Academy
SO INTERNATIONAL STUDIES PERSPECTIVES
LA English
DT Article
DE teaching ethics; military academy; John Boehrer; Lawrence Rockwood
AB This article offers the reflections of a civilian instructor in ethics after 20 years of teaching at the United States Naval Academy in Annapolis. It describes his efforts to provide the midshipmen in his classes a realistic, practical, yet very demanding preview of the ethical challenges they will face once they are officers deployed to the fleet.
C1 USN Acad, Annapolis, MD 21402 USA.
RP Wrage, S (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 4
TC 0
Z9 0
U1 0
U2 1
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1528-3577
J9 INT STUD PERSPECT
JI Int. Stud. Perspect.
PD FEB
PY 2012
VL 13
IS 1
BP 21
EP 25
DI 10.1111/j.1528-3585.2011.00452.x
PG 5
WC International Relations
SC International Relations
GA 874TV
UT WOS:000298981900007
ER
PT J
AU Oei, JD
Zhao, WW
Chu, LR
DeSilva, MN
Ghimire, A
Rawls, HR
Whang, K
AF Oei, James D.
Zhao, William W.
Chu, Lianrui
DeSilva, Mauris N.
Ghimire, Abishek
Rawls, H. Ralph
Whang, Kyumin
TI Antimicrobial acrylic materials with in situ generated silver
nanoparticles
SO JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
LA English
DT Article
DE cranioplasty; silver nanoparticles; polymethyl methacrylate; bone
cement; antimicrobial
ID TOTAL JOINT REPLACEMENT; ANTIBIOTIC BONE-CEMENT; INFECTION;
CRANIOPLASTY; BIOMATERIALS; EFFICACY; RISK; IONS
AB Polymethyl methacrylate (PMMA) is widely used to treat traumatic head injuries (cranioplasty) and orthopedic injuries (bone cement), but there is a problem with implant-centered infections. With organisms such as Acinetobacter baumannii and methicillin-resistant staphylococcus aureus developing resistance to antibiotics, there is a need for novel antimicrobial delivery mechanisms without risk of developing resistant organisms. Objectives: To develop a novel antimicrobial implant material by generating silver nanoparticles (AgNP) in situ in PMMA. Results: All PMMA samples with AgNP's (AgNP-PMMA) released Ag+ ions in vitro for over 28 days. In vitro antimicrobial assays revealed that these samples (even samples with the slowest release rate) inhibited 99.9% of bacteria against four different strains of bacteria. Long-term antimicrobial assay showed a continued antibacterial effect past 28 days. Some AgNP-loaded PMMA groups had comparable Durometer-D hardness (a measure of degree of cure) and modulus to control PMMA, but all experimental groups had slightly lower ultimate transverse strengths. Conclusions: AgNP-PMMA demonstrated a tremendously broad-spectrum and long-intermediate-term antimicrobial effect with comparable mechanical properties to control PMMA. Current efforts are focused on further improving mechanical properties by reducing AgNP loading and assessing fatigue properties. (C) 2011 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 100B: 409415, 2012.
C1 [Oei, James D.; Zhao, William W.; Ghimire, Abishek; Rawls, H. Ralph; Whang, Kyumin] Univ Texas Hlth Sci Ctr San Antonio, Div Res, Dept Comprehens Dent, San Antonio, TX 78229 USA.
[Zhao, William W.; Chu, Lianrui; DeSilva, Mauris N.; Whang, Kyumin] USN, Med Res Unit, Ft Sam Houston, TX USA.
RP Whang, K (reprint author), Univ Texas Hlth Sci Ctr San Antonio, Div Res, Dept Comprehens Dent, San Antonio, TX 78229 USA.
EM whang@uthscsa.edu
NR 30
TC 20
Z9 20
U1 1
U2 22
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1552-4973
J9 J BIOMED MATER RES B
JI J. Biomed. Mater. Res. Part B
PD FEB
PY 2012
VL 100B
IS 2
BP 409
EP 415
DI 10.1002/jbm.b.31963
PG 7
WC Engineering, Biomedical; Materials Science, Biomaterials
SC Engineering; Materials Science
GA 872EV
UT WOS:000298792500012
PM 22102276
ER
PT J
AU Edmunds, J
Hazelbaker, A
Murphy, JG
Philipp, BL
AF Edmunds, Janet
Hazelbaker, Alison
Murphy, James G.
Philipp, Barbara L.
TI Tongue-Tie
SO JOURNAL OF HUMAN LACTATION
LA English
DT Editorial Material
ID ANKYLOGLOSSIA; INFANTS
C1 [Hazelbaker, Alison] IBCLC, Columbus, OH USA.
[Murphy, James G.] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
[Murphy, James G.] USN, Med Ctr, San Diego, CA 92152 USA.
[Philipp, Barbara L.] Boston Univ, Sch Med, Boston, MA 02215 USA.
[Philipp, Barbara L.] Boston Med Ctr, Boston, MA USA.
NR 7
TC 4
Z9 4
U1 0
U2 8
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0890-3344
J9 J HUM LACT
JI J. Hum. Lact.
PD FEB
PY 2012
VL 28
IS 1
BP 14
EP 17
DI 10.1177/0890334411428588
PG 4
WC Nursing; Obstetrics & Gynecology; Pediatrics
SC Nursing; Obstetrics & Gynecology; Pediatrics
GA 878PQ
UT WOS:000299269400004
PM 22267314
ER
PT J
AU Dimitrov, NB
Plaxton, CG
AF Dimitrov, Nedialko B.
Plaxton, C. Greg
TI Competitive Weighted Matching in Transversal Matroids
SO ALGORITHMICA
LA English
DT Article
DE Matching; Online algorithm; Secretary problem; Transversal matroid
AB Consider a bipartite graph with a set of left-vertices and a set of right-vertices. All the edges adjacent to the same left-vertex have the same weight. We present an algorithm that, given the set of right-vertices and the number of left-vertices, processes a uniformly random permutation of the left-vertices, one left-vertex at a time. In processing a particular left-vertex, the algorithm either permanently matches the left-vertex to a thus-far unmatched right-vertex, or decides never to match the left-vertex. The weight of the matching returned by our algorithm is within a constant factor of that of a maximum weight matching, generalizing the recent results of Babaioff et al.
C1 [Dimitrov, Nedialko B.] USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
[Plaxton, C. Greg] Univ Texas Austin, Dept Comp Sci, Austin, TX 78701 USA.
RP Dimitrov, NB (reprint author), USN, Postgrad Sch, Dept Operat Res, 1411 Cunningham Rd, Monterey, CA 93943 USA.
EM ned@alumni.cs.utexas.edu; plaxton@cs.utexas.edu
FU University of Texas at Austin; NSF [CCF-0635203, ANI-0326001]
FX N.B. Dimitrov is supported by an MCD Fellowship from the University of
Texas at Austin.; C.G. Plaxton is supported by NSF Grants CCF-0635203
and ANI-0326001.
NR 12
TC 6
Z9 6
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0178-4617
J9 ALGORITHMICA
JI Algorithmica
PD FEB
PY 2012
VL 62
IS 1-2
BP 333
EP 348
DI 10.1007/s00453-010-9457-2
PG 16
WC Computer Science, Software Engineering; Mathematics, Applied
SC Computer Science; Mathematics
GA 866NQ
UT WOS:000298388200014
ER
PT J
AU Howard, EC
Hamdan, LJ
Lizewski, SE
Ringeisen, BR
AF Howard, Erinn C.
Hamdan, Leila J.
Lizewski, Stephen E.
Ringeisen, Bradley R.
TI High frequency of glucose-utilizing mutants in Shewanella oneidensis
MR-1
SO FEMS MICROBIOLOGY LETTERS
LA English
DT Article
DE GASP mutants; Shewanella oneidensis MR-1; glucose use; mutator bacteria;
microbial fuel cells
ID SP-NOV.; ESCHERICHIA-COLI; STATIONARY-PHASE; GENUS SHEWANELLA; SP. NOV;
EVOLUTION; DEEP; SEA; COMPETITION; REDUCTION
AB Shewanella oneidensis MR-1 has conventionally been considered unable to use glucose as a carbon substrate for growth. The genome sequence of S. oneidensis MR-1 however suggests the ability to use glucose. Here, we demonstrate that during initial glucose exposure, S. oneidensis MR-1 quickly and frequently gains the ability to utilize glucose as a sole carbon source, in contrast to wild-type S. oneidensis, which cannot immediately use glucose as a sole carbon substrate. High-performance liquid chromatography and 14C glucose tracer studies confirm the disappearance in cultures and assimilation and respiration, respectively, of glucose. The relatively short time frame with which S. oneidensis MR-1 gained the ability to use glucose raises interesting ecological implications.
C1 [Howard, Erinn C.] CNR, Washington, DC 20418 USA.
[Howard, Erinn C.; Ringeisen, Bradley R.] USN, Res Lab, Bioenergy & Biofabricat Sect, Washington, DC 20375 USA.
[Hamdan, Leila J.] USN, Res Lab, Marine Biogeochem Sect, Washington, DC 20375 USA.
[Lizewski, Stephen E.] USN, Res Lab, Lab Biosensors & Biomat, Washington, DC 20375 USA.
RP Ringeisen, BR (reprint author), 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM bradley.ringeisen@nrl.navy.mil
RI Hamdan, Leila/A-4535-2009
OI Hamdan, Leila/0000-0001-7331-0729
FU Office of Naval Research through NRL [62123N]; NRL [61153N]
FX We thank Preston A. Fulmer for laboratory assistance. We also thank
Russell Kirk Pirlo, Lisa A. Fitzgerald, Justin C. Biffinger, and
anonymous reviewers for helpful comments. This work was funded by the
Office of Naval Research through NRL Program Element Number 62123N and
NRL Program Element Number 61153N. This work was carried out while
E.C.H. held a National Research Council Post-Doctoral Associateship.
NR 32
TC 8
Z9 8
U1 2
U2 19
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0378-1097
J9 FEMS MICROBIOL LETT
JI FEMS Microbiol. Lett.
PD FEB
PY 2012
VL 327
IS 1
BP 9
EP 14
DI 10.1111/j.1574-6968.2011.02450.x
PG 6
WC Microbiology
SC Microbiology
GA 872ZM
UT WOS:000298850100002
PM 22092702
ER
PT J
AU Shen, YC
Hsia, RY
AF Shen, Yu-Chu
Hsia, Renee Y.
TI Does Decreased Access to Emergency Departments Affect Patient Outcomes?
Analysis of Acute Myocardial Infarction Population 1996-2005
SO HEALTH SERVICES RESEARCH
LA English
DT Article
DE Emergency department access; acute myocardial infarction; health
outcomes
ID DELAYS; TIME; CARE; PAIN
AB Objective. We analyze whether decreased emergency department (ED) access results in adverse patient outcomes or changes in the patient health profile for patients with acute myocardial infarction (AMI).
Data. We merge Medicare claims, American Hospital Association annual surveys, Medicare hospital cost reports, and location information for 1995-2005.
Study Design. We define four ED access change categories and estimate a ZIP Code fixed-effects regression models on the following AMI outcomes: mortality rates, age, and probability of percutaneous transluminal coronary angioplasty (PTCA) on day of admission.
Principal Findings. We find a small increase in 30-day to 1-year mortality rates among patients in communities that experience a <10-minute increase in driving time. Among patients in communities with >30-minute increases, we find a substantial increase in long-term mortality rates, a shift to younger ages (suggesting that older patients die en route), and a higher probability of immediate PTCA. Most of the adverse effects disappear after the transition years.
Conclusions. Deterioration in geographic access to ED affects a small segment of the population, and most adverse effects are transitory. Policy planners can minimize the adverse effects by providing assistance to ensure adequate capacity of remaining EDs, and facilitating the realignment of health care resources during the critical transition periods.
C1 [Shen, Yu-Chu] USN, Grad Sch Business & Publ Policy, Postgrad Sch, Monterey, CA 93943 USA.
[Shen, Yu-Chu] Natl Bur Econ Res, Cambridge, MA 02138 USA.
[Hsia, Renee Y.] Univ Calif San Francisco, Dept Emergency Med, San Francisco, CA 94143 USA.
RP Shen, YC (reprint author), USN, Grad Sch Business & Publ Policy, Postgrad Sch, 555 Dyer Rd, Monterey, CA 93943 USA.
EM yshen@nps.edu
FU Robert Wood Johnson Foundation's Changes in Health Care Financing and
Organization initiative [63974]; Robert Wood Johnson Foundation;
National Institutes of Health/National Center for Research Resources,
University of California, San Francisco Clinical and Translational
Science [KL2 RR024130]
FX Joint Acknowledgment/Disclosure Statement: We would like to thank Jean
Roth (National Bureau of Economic Research) for helping to extract the
Medicare data; Shouzu Lin (VA, Menlo Park) for excellent programming
assistance; Laurence Baker (Stanford University) for helpful comments
throughout the project; Tanja Srebotnjak (Ecologic Institute, Berlin,
Germany) for her assistance in the generation of the map; and Amy J.
Markowitz (UCSF) for copy editing. This project was supported by the
Robert Wood Johnson Foundation's Changes in Health Care Financing and
Organization initiative (grant 63974). In addition, Hsia was supported
in part by a grant under the Robert Wood Johnson Foundation's Physician
Faculty Scholars Program and the National Institutes of Health/National
Center for Research Resources, University of California, San Francisco
Clinical and Translational Science (KL2 RR024130). The views expressed
herein are those of the authors and do not necessarily reflect the views
of the funder or authors' affiliated institutions.
NR 21
TC 8
Z9 8
U1 0
U2 2
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0017-9124
J9 HEALTH SERV RES
JI Health Serv. Res.
PD FEB
PY 2012
VL 47
IS 1
BP 188
EP 210
DI 10.1111/j.1475-6773.2011.01319.x
PN 1
PG 23
WC Health Care Sciences & Services; Health Policy & Services
SC Health Care Sciences & Services
GA 875OM
UT WOS:000299040600012
PM 22091922
ER
PT J
AU Walters, RC
Marguet, CG
Crain, DS
AF Walters, R. Chanc
Marguet, Charles G.
Crain, Donald S.
TI Lower Prevalence of Varicoceles in Obese Patients Found on Routine
Scrotal Ultrasound
SO JOURNAL OF UROLOGY
LA English
DT Article
DE scrotum; varicocele; obesity; ultrasonography; physical examination
ID BODY-MASS INDEX; INFERTILITY; PARAMETERS; REPAIR; MEN
AB Purpose: Research shows that obese patients have a lower incidence of varicoceles. Increased adipose tissue, which makes physical examination difficult, was hypothesized to be the cause. We evaluated the varicocele incidence on routine scrotal ultrasound to see whether difficult physical examination was causative.
Materials and Methods: We reviewed all scrotal ultrasounds from the last 2 years for men 18 to 40 years old who had a recorded body mass index. Physical examination findings and the indication for ultrasound were included. We used standard criteria for ultrasound detected varicoceles. National Institutes of Health criteria was used to classify patients as normal-body mass index less than 25 kg/m(2), overweight-25 to 30 or obese-greater than 30.
Results: Of the 1,079 patients 330 (30.6%) had an ultrasound detected varicocele. Mean +/- SD body mass index in those with vs without a varicocele was 26.7 +/- 3.8 vs 26.0 +/- 3.7 kg/m(2) (p = 0.04). On physical examination 171 patients (16.0%) had a varicocele. Mean body mass index in those with vs without a varicocele on physical examination was 26.6 +/- 3.7 vs 26.4 +/- 3.9 kg/m(2) (p = 0.09). We calculated varicocele frequency by body mass index for ultrasound detected varicoceles only. Of 374 normal weight patients 129 (34.5%) had a varicocele while in the overweight and obese groups 163 of 535 (30.6%) and 43 of 170 (25.6%), respectively, had a varicocele. The difference between normal and obese patients was statistically significant (p = 0.04).
Conclusions: Obese patients have a lower prevalence of varicoceles detected by ultrasound. The lower prevalence is independent of physical examination and more likely due to another factor.
C1 [Walters, R. Chanc; Marguet, Charles G.; Crain, Donald S.] USN, Dept Urol, San Diego Med Ctr, San Diego, CA 92152 USA.
RP Walters, RC (reprint author), 9747 Stonecrest Blvd, San Diego, CA 92123 USA.
NR 15
TC 5
Z9 5
U1 0
U2 0
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0022-5347
J9 J UROLOGY
JI J. Urol.
PD FEB
PY 2012
VL 187
IS 2
BP 599
EP 601
DI 10.1016/j.juro.2011.10.039
PG 3
WC Urology & Nephrology
SC Urology & Nephrology
GA 875YC
UT WOS:000299070400083
ER
PT J
AU Briggs, BJ
Dickerman, JD
AF Briggs, Benjamin J.
Dickerman, Joseph D.
TI Bleeding disorders in Noonan syndrome
SO PEDIATRIC BLOOD & CANCER
LA English
DT Review
DE bleeding disorders; genetics; hemostasis; neurocardiofacialcutaneous
syndrome family; Noonan syndrome
ID PROTEIN-TYROSINE-PHOSPHATASE; CONGENITAL HEART DISEASE; MUTATIONS CAUSE
NOONAN; PLATELET DYSFUNCTION; GENE ANALYSIS; FACTOR-XI; DEFICIENCY;
COAGULATION; PHENOTYPE; PTPN11
AB Noonan Syndrome (NS) is a common genetic disease with multiple organ defects including bleeding disorders, which was last reviewed in 1997. Since then significant information has been acquired regarding bleeding problems in NS, specifically on the underlying genetics. Associations between mutated genes and bleeding disorders are reviewed along with prevalence and underlying etiologies. Between 5089% of NS patients will have a bleeding disorder and since a significant number will require surgery it is important to identify which ones are at risk prior to their procedure. Recommendations regarding screening for bleeding disorders and their treatment are discussed. Pediatr Blood Cancer 2012; 58: 167172. (C) 2011 Wiley Periodicals, Inc.
C1 [Briggs, Benjamin J.] USN, Med Ctr, San Diego, CA 92152 USA.
[Dickerman, Joseph D.] Univ Vermont, Coll Med, Burlington, VT 05405 USA.
RP Briggs, BJ (reprint author), USN, Med Ctr, San Diego, CA 92152 USA.
EM benjamin.briggs@med.navy.mil
NR 48
TC 11
Z9 11
U1 3
U2 6
PU WILEY PERIODICALS, INC
PI MALDEN
PA COMMERCE PLACE, 350 MAIN STREET, MALDEN, MA 02148-529 USA
SN 1545-5009
J9 PEDIATR BLOOD CANCER
JI Pediatr. Blood Cancer
PD FEB
PY 2012
VL 58
IS 2
BP 167
EP 172
DI 10.1002/pbc.23358
PG 6
WC Oncology; Hematology; Pediatrics
SC Oncology; Hematology; Pediatrics
GA 864RZ
UT WOS:000298259000004
PM 22012616
ER
PT J
AU Johnson-Freese, J
Weeden, B
AF Johnson-Freese, Joan
Weeden, Brian
TI Application of Ostrom's Principles for Sustainable Governance of
Common-Pool Resources to Near-Earth Orbit
SO GLOBAL POLICY
LA English
DT Article
AB Near-Earth orbit is a key global resource, hosting assets critical to governments, militaries and commercial entities and providing services for global communications, remote sensing, national and international security, and accurate positioning and timing. It is also an increasingly crowded, congested and contested environment, at risk from both intentional and unintentional activities and events, and threats natural and human-made. Ensuring the long-term sustainability of the space environment is an increasingly recognized need by all users of space. This article considers the viability of principles regarding sustainable common-pool resources (CPRs) established by Elinor Ostrom for space governance. In this initial consideration, we focus specifically on the issues of boundaries, collective choice arrangements and monitoring. Within those contexts, Ostrom's principles appear most useful for identifying gaps in the current space governance system and mechanisms. Further, while Ostrom provides multiple success stories for her model, they typically include common-pool regimes functioning at a local level, with success stories on a larger scale elusive. Near-Earth orbit is perhaps the largest-scale CPR to consider. Consequently, not only is additional work needed to relate Ostrom's model specifically to space, but to determine the limits of applicability of Ostrom's model and other models that should be considered.
C1 [Johnson-Freese, Joan] USN, War Coll, Natl Secur Affairs Dept, Newport, RI USA.
RP Johnson-Freese, J (reprint author), USN, War Coll, Natl Secur Affairs Dept, Newport, RI USA.
OI Weeden, Brian/0000-0002-7232-5985
NR 25
TC 0
Z9 0
U1 0
U2 6
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1758-5880
J9 GLOB POLICY
JI Glob. Policy
PD FEB
PY 2012
VL 3
IS 1
BP 72
EP 81
DI 10.1111/j.1758-5899.2011.00109.x
PG 10
WC International Relations; Political Science
SC International Relations; Government & Law
GA 061YH
UT WOS:000312885700008
ER
PT J
AU Roach, JA
AF Roach, J. Ashley
TI The Central Arctic Ocean: Another Global Commons
SO GLOBAL POLICY
LA English
DT Article
C1 [Roach, J. Ashley] USN, Judge Advocate Gen Corps, Stennis Space Ctr, MS USA.
[Roach, J. Ashley] US Dept State, Washington, DC USA.
NR 3
TC 0
Z9 0
U1 1
U2 10
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1758-5880
J9 GLOB POLICY
JI Glob. Policy
PD FEB
PY 2012
VL 3
IS 1
BP 82
EP 84
DI 10.1111/j.1758-5899.2011.00149.x
PG 3
WC International Relations; Political Science
SC International Relations; Government & Law
GA 061YH
UT WOS:000312885700009
ER
PT J
AU Evans, BA
Fiser, BL
Prins, WJ
Rapp, DJ
Shields, AR
Glass, DR
Superfine, R
AF Evans, Benjamin A.
Fiser, Briana L.
Prins, Willem J.
Rapp, Daniel J.
Shields, Adam R.
Glass, Daniel R.
Superfine, R.
TI A highly tunable silicone-based magnetic elastomer with nanoscale
homogeneity
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article
DE Magnetic polymer; PDMS; Composite material; Magnetic nanoparticle;
Actuator; Microelectromechanical system
ID BIOMIMETIC CILIA; NANOPARTICLES; GELS; COMPOSITES; HYDROGELS; BEHAVIOR;
FIELD; SOFT; MICROACTUATION; ACTUATORS
AB Magnetic elastomers have been widely pursued for sensing and actuation applications. Silicone-based magnetic elastomers have a number of advantages over other materials such as hydrogels, but aggregation of magnetic nanoparticles within silicones is difficult to prevent. Aggregation inherently limits the minimum size of fabricated structures and leads to non-uniform response from structure to structure. We have developed a novel material that is a complex of a silicone polymer (polydimethyl-siloxane-co-aminopropylmethylsiloxane) adsorbed onto the surface of magnetite (gamma-Fe(2)O(3)) nanoparticles 7-10 nm in diameter. The material is homogenous at very small length scales (< 100 nm) and can be crosslinked to form a flexible magnetic material, which is ideally suited for the fabrication of micro-to nanoscale magnetic actuators. The loading fraction of magnetic nanoparticles in the composite can be varied smoothly from 0 to 50 wt% without loss of homogeneity, providing a simple mechanism for tuning actuator response. We evaluate the material properties of the composite across a range of nanoparticle loading, and demonstrate a magnetic-field-induced increase in compressive modulus as high as 300%. Furthermore, we implement a strategy for predicting the optimal nanoparticle loading for magnetic actuation applications, and show that our predictions correlate well with experimental findings. (C) 2011 Elsevier B.V. All rights reserved.
C1 [Evans, Benjamin A.; Prins, Willem J.; Rapp, Daniel J.; Glass, Daniel R.] Elon Univ, Dept Phys, Elon, NC 27244 USA.
[Fiser, Briana L.; Superfine, R.] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA.
[Shields, Adam R.] USN, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC 20375 USA.
RP Evans, BA (reprint author), Elon Univ, Dept Phys, CB 2625, Elon, NC 27244 USA.
EM ben.evans@elon.edu
RI Shields, Adam/A-3575-2012; Superfine, Richard/A-1968-2012
FU NSF NIRT [CMS-0507151]; Virtual Lung Project [NIH R01-HL077546-01A2];
Center for Computer Integrated Systems for Microscopy and Manipulation
[NIH P41-EB002025-24A1]; Office of Undergraduate Research at Elon
University
FX This work was funded in part by NSF NIRT (CMS-0507151), the Virtual Lung
Project (NIH R01-HL077546-01A2), the Center for Computer Integrated
Systems for Microscopy and Manipulation (NIH P41-EB002025-24A1), and the
Office of Undergraduate Research at Elon University.
NR 46
TC 26
Z9 26
U1 1
U2 43
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD FEB
PY 2012
VL 324
IS 4
BP 501
EP 507
DI 10.1016/j.jmmm.2011.08.045
PG 7
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 841TP
UT WOS:000296536700024
PM 22184482
ER
PT J
AU Chun, C
Neta, B
AF Chun, Changbum
Neta, Beny
TI A new sixth-order scheme for nonlinear equations
SO APPLIED MATHEMATICS LETTERS
LA English
DT Article
DE Newton's method; Iterative methods; Nonlinear equations; Order of
convergence; Root-finding methods
ID FAMILY; ORDER
AB In this paper we present a new efficient sixth-order scheme for nonlinear equations. The method is compared to several members of the family of methods developed by Neta (1979) [B. Neta, A sixth-order family of methods for nonlinear equations, lnt. J. Comput. Math. 7 (1979) 157-161]. It is shown that the new method is an improvement over this well known scheme. Published by Elsevier Ltd
C1 [Neta, Beny] USN, Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
[Chun, Changbum] Sungkyunkwan Univ, Dept Math, Suwon 440746, South Korea.
RP Neta, B (reprint author), USN, Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
EM cbchun@skku.edu; bneta@nps.edu
OI Neta, Beny/0000-0002-7417-7496
FU National Research Foundation of Korea (NRF); Ministry of Education,
Science and Technology [2011-0025877]
FX The first author's research was supported by Basic Science Research
Program through the National Research Foundation of Korea (NRF) funded
by the Ministry of Education, Science and Technology (2011-0025877).
NR 11
TC 7
Z9 7
U1 0
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0893-9659
J9 APPL MATH LETT
JI Appl. Math. Lett.
PD FEB
PY 2012
VL 25
IS 2
BP 185
EP 189
DI 10.1016/j.aml.2011.08.012
PG 5
WC Mathematics, Applied
SC Mathematics
GA 835MY
UT WOS:000296041700019
ER
PT J
AU Moline, MA
Robbins, I
Zelenke, B
Pegau, WS
Wijesekera, H
AF Moline, Mark A.
Robbins, Ian
Zelenke, Brian
Pegau, W. Scott
Wijesekera, Hemantha
TI Evaluation of bio-optical inversion of spectral irradiance measured from
an autonomous underwater vehicle
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID ATTENUATION COEFFICIENT; OPTICAL-PROPERTIES; SURFACE-WAVES; THIN-LAYERS;
PHYTOPLANKTON; OCEAN; ABSORPTION; WATER; PHOTOSYNTHESIS; VARIABILITY
AB Autonomous underwater vehicles (AUVs) can map water conditions at high spatial (horizontal and vertical) and temporal resolution, including under cloudy conditions when satellite and airborne remote sensing are not feasible. As part of the RADYO program, we deployed a passive radiometer on an AUV in the Santa Barbara Channel and off the coast of Hawaii to apply existing bio-optical algorithms for characterizing the optical constituents of coastal seawater (i.e., dissolved organic material, algal biomass, and other particles). The spectral differences between attenuation coefficients were computed from ratios of downwelling irradiance measured at depth and used to provide estimates of the in-water optical constituents. There was generally good agreement between derived values of absorption and concurrent measurements of this inherent optical property in Santa Barbara Channel. Wave focusing, cloud cover, and low attenuation coefficients influenced results off the coast of Hawaii and are used to evaluate the larger-scale application of these methods in the near surface coastal oceans.
C1 [Moline, Mark A.; Robbins, Ian; Zelenke, Brian] Calif Polytech State Univ San Luis Obispo, Dept Biol Sci, San Luis Obispo, CA 93407 USA.
[Moline, Mark A.; Robbins, Ian; Zelenke, Brian] Calif Polytech State Univ San Luis Obispo, Ctr Coastal Marine Sci, San Luis Obispo, CA 93407 USA.
[Pegau, W. Scott] Oil Spill Recovery Inst, Cordova, AK 99574 USA.
[Wijesekera, Hemantha] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Moline, MA (reprint author), Calif Polytech State Univ San Luis Obispo, Dept Biol Sci, 1 Grand Ave, San Luis Obispo, CA 93407 USA.
EM mmoline@calpoly.edu
FU Office of Naval Research (ONR) [N00014-06-1-0070]
FX We thank the crew of the R/V Kilo Moana for their assistance in data
collection. We also thank Jessica Connolly for assistance in the field
effort in the Santa Barbara Channel and Johanna Weston for general
assistance. This research was funded through the Office of Naval
Research (ONR) project "Variability of near surface optical properties
in high sea state conditions" under grant N00014-06-1-0070 to W. S.
Pegau and M. Moline.
NR 51
TC 3
Z9 3
U1 1
U2 3
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD JAN 31
PY 2012
VL 117
AR C00H15
DI 10.1029/2011JC007352
PG 12
WC Oceanography
SC Oceanography
GA 887TT
UT WOS:000299954000006
ER
PT J
AU Raphael, M
Christodoulides, J
Byers, J
AF Raphael, Marc
Christodoulides, Joseph
Byers, Jeff
TI A New Methodology for Quantitative LSPR Biosensing
SO BIOPHYSICAL JOURNAL
LA English
DT Meeting Abstract
CT 56th Annual Meeting of the Biophysical-Society
CY FEB 25-29, 2012
CL San Diego, CA
SP Biophys Soc
C1 [Raphael, Marc; Christodoulides, Joseph; Byers, Jeff] Naval Res Lab, Washington, DC USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD JAN 31
PY 2012
VL 102
IS 3
SU 1
BP 109A
EP 109A
PG 1
WC Biophysics
SC Biophysics
GA 179ZF
UT WOS:000321561200551
ER
PT J
AU Roche, J
Caro, JA
Norberto, D
Barthe, P
Roumestand, C
Schlessman, JL
Garcia, AE
Garcia-Moreno, B
Royer, CA
AF Roche, Julien
Caro, Jose A.
Norberto, Douglas
Barthe, Philippe
Roumestand, Christian
Schlessman, Jamie L.
Garcia, Angel E.
Garcia-Moreno E, Bertrand
Royer, Catherine A.
TI Cavities in the Hydrophobic Core Govern Pressure Unfolding of Proteins
SO BIOPHYSICAL JOURNAL
LA English
DT Meeting Abstract
CT 56th Annual Meeting of the Biophysical-Society
CY FEB 25-29, 2012
CL San Diego, CA
SP Biophys Soc
C1 [Roche, Julien; Norberto, Douglas; Barthe, Philippe; Roumestand, Christian; Royer, Catherine A.] CNRS, UMR5048, INSERM, U554,Ctr Biochim Struct, Montpellier, France.
[Caro, Jose A.; Garcia-Moreno E, Bertrand] Johns Hopkins Univ, Dept Biophys, Baltimore, MD USA.
[Schlessman, Jamie L.] US Naval Acad, Dept Chem, Annapolis, MD USA.
[Garcia, Angel E.] Rensselaer Polytech Inst, Dept Phys & Appl Phys, Troy, NY USA.
[Garcia, Angel E.] Rensselaer Polytech Inst, Ctr Biotechnol & Interdisciplinary Studies, Troy, NY USA.
NR 1
TC 0
Z9 0
U1 1
U2 2
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD JAN 31
PY 2012
VL 102
IS 3
SU 1
BP 218A
EP 218A
PG 1
WC Biophysics
SC Biophysics
GA 179ZF
UT WOS:000321561201402
ER
PT J
AU Kim, Y
Mittal, J
AF Kim, Youngchan
Mittal, Jeetain
TI Quantitative Theory for Protein-Protein Interactions in a Crowded
Environment
SO BIOPHYSICAL JOURNAL
LA English
DT Meeting Abstract
CT 56th Annual Meeting of the Biophysical-Society
CY FEB 25-29, 2012
CL San Diego, CA
SP Biophys Soc
C1 [Kim, Youngchan] Naval Res Lab, Washington, DC USA.
[Mittal, Jeetain] Lehigh Univ, Bethlehem, PA 18015 USA.
NR 0
TC 0
Z9 0
U1 3
U2 4
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0006-3495
J9 BIOPHYS J
JI Biophys. J.
PD JAN 31
PY 2012
VL 102
IS 3
SU 1
BP 473A
EP 474A
PG 2
WC Biophysics
SC Biophysics
GA 179ZF
UT WOS:000321561203280
ER
PT J
AU Bewley, WW
Canedy, CL
Kim, CS
Kim, M
Merritt, CD
Abell, J
Vurgaftman, I
Meyer, JR
AF Bewley, William W.
Canedy, Chadwick L.
Kim, Chul Soo
Kim, Mijin
Merritt, Charles D.
Abell, Joshua
Vurgaftman, Igor
Meyer, Jerry R.
TI Continuous-wave interband cascade lasers operating above room
temperature at lambda=4.7-5.6 mu m
SO OPTICS EXPRESS
LA English
DT Article
ID POWER
AB We have substantially improved the performance of interband cascade lasers emitting at lambda = 4.7 and 5.6 mu m, by applying the recently-pioneered approach of heavily doping the injector regions to rebalance the electron and hole concentrations in the active quantum wells. Ridges of approximate to 10 mu m width, 4 mm length, and high-reflectivity back facets achieve maximum continuous wave operating temperatures of 60 degrees C and 48 degrees C, respectively. The threshold power density of approximate to 1 kW/cm(2) at T = 25 degrees C is over an order of magnitude lower than for state-of-the-art quantum cascade lasers emitting in this spectral range. (C) 2012 Optical Society of America
C1 [Bewley, William W.; Canedy, Chadwick L.; Kim, Chul Soo; Merritt, Charles D.; Abell, Joshua; Vurgaftman, Igor; Meyer, Jerry R.] USN, Res Lab, Washington, DC 20375 USA.
[Kim, Mijin] Sotera Def Solut Inc, Crofton, MD 21114 USA.
RP Bewley, WW (reprint author), USN, Res Lab, Code 5613, Washington, DC 20375 USA.
EM vurgaftman@nrl.navy.mil
NR 14
TC 43
Z9 44
U1 2
U2 13
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD JAN 30
PY 2012
VL 20
IS 3
BP 3235
EP 3240
DI 10.1364/OE.20.003235
PG 6
WC Optics
SC Optics
GA 895ME
UT WOS:000300499500130
PM 22330561
ER
PT J
AU Prokes, SM
Glembocki, OJ
Cleveland, E
Caldwell, JD
Foos, E
Niinisto, J
Ritala, M
AF Prokes, S. M.
Glembocki, O. J.
Cleveland, Erin
Caldwell, Josh D.
Foos, Edward
Niinisto, Jaakko
Ritala, Mikko
TI Spoof-like plasmonic behavior of plasma enhanced atomic layer deposition
grown Ag thin films
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID NANOSPHERE LITHOGRAPHY; SILVER NANOPARTICLES
AB The plasmonic behavior of Ag thin films produced by plasma enhanced atomic layer deposition (PEALD) has been investigated. We show that as-deposited flat PEALD Ag films exhibit unexpected plasmonic properties, and the plasmonic enhancement can differ markedly, depending on the microstructure of the Ag film. Electromagnetic field simulations indicate that this plasmonic behavior is due to air gaps that are an inherent property of the mosaic-like microstructure of the PEALD-grown Ag film, suggesting that this is a metamaterial with behavior very similar to what would be expected in spoof plasmonics where gaps are fabricated in films to create plasmonic-like resonances. (C) 2012 American Institute of Physics. [doi:10.1063/1.3679106]
C1 [Prokes, S. M.; Glembocki, O. J.; Cleveland, Erin; Caldwell, Josh D.; Foos, Edward] USN, Res Lab, Washington, DC 20375 USA.
[Niinisto, Jaakko; Ritala, Mikko] Univ Helsinki, Inorgan Chem Lab, FI-00014 Helsinki, Finland.
RP Prokes, SM (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM prokes@nrl.navy.mil
RI Caldwell, Joshua/B-3253-2008; Ritala, Mikko/N-7268-2013; Niinisto,
Jaakko/J-3894-2014
OI Caldwell, Joshua/0000-0003-0374-2168; Ritala, Mikko/0000-0002-6210-2980;
NR 9
TC 13
Z9 13
U1 5
U2 49
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 30
PY 2012
VL 100
IS 5
AR 053106
DI 10.1063/1.3679106
PG 3
WC Physics, Applied
SC Physics
GA 889HW
UT WOS:000300065300062
ER
PT J
AU Agakishiev, G
Aggarwal, MM
Ahammed, Z
Alakhverdyants, AV
Alekseev, I
Alford, J
Anderson, BD
Anson, CD
Arkhipkin, D
Averichev, GS
Balewski, J
Beavis, DR
Behera, NK
Bellwied, R
Betancourt, MJ
Betts, RR
Bhasin, A
Bhati, AK
Bichsel, H
Bielcik, J
Bielcikova, J
Bland, LC
Bordyuzhin, IG
Borowski, W
Bouchet, J
Braidot, E
Brandin, AV
Bridgeman, A
Brovko, SG
Bruna, E
Bueltmann, S
Bunzarov, I
Burton, TP
Cai, XZ
Caines, H
Sanchez, MCD
Cebra, D
Cendejas, R
Cervantes, MC
Chaloupka, P
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Chen, L
Cheng, J
Cherney, M
Chikanian, A
Choi, KE
Christie, W
Chung, P
Codrington, MJM
Corliss, R
Cramer, JG
Crawford, HJ
Leyva, AD
De Silva, LC
Debbe, RR
Dedovich, TG
Deng, J
Derevschikov, AA
de Souza, RD
Didenko, L
Djawotho, P
Dogra, SM
Dong, X
Drachenberg, JL
Draper, JE
Du, CM
Dunlop, JC
Efimov, LG
Elnimr, M
Engelage, J
Eppley, G
Estienne, M
Eun, L
Evdokimov, O
Fatemi, R
Fedorisin, J
Fersch, RG
Filip, P
Finch, E
Fine, V
Fisyak, Y
Gagliardi, CA
Geurts, F
Ghosh, P
Gorbunov, YN
Gordon, A
Grebenyuk, OG
Grosnick, D
Gupta, A
Gupta, S
Guryn, W
Haag, B
Hajkova, O
Hamed, A
Han, LX
Harris, JW
Hays-Wehle, JP
Heinz, M
Heppelmann, S
Hirsch, A
Hjort, E
Hoffmann, GW
Hofman, DJ
Huang, B
Huang, HZ
Humanic, TJ
Huo, L
Igo, G
Jacobs, P
Jacobs, WW
Jena, C
Jin, F
Joseph, J
Judd, EG
Kabana, S
Kang, K
Kapitan, J
Kauder, K
Ke, HW
Keane, D
Kechechyan, A
Kettler, D
Kikola, DP
Kiryluk, J
Kisiel, A
Kizka, V
Klein, SR
Knospe, AG
Koetke, DD
Kollegger, T
Konzer, J
Koralt, I
Koroleva, L
Korsch, W
Kotchenda, L
Kouchpil, V
Kravtsov, P
Krueger, K
Krus, M
Kumar, L
Lamont, MAC
Landgraf, JM
LaPointe, S
Lauret, J
Lebedev, A
Lednicky, R
Lee, JH
Leight, W
LeVine, MJ
Li, C
Li, L
Li, N
Li, W
Li, X
Li, X
Li, Y
Li, ZM
Lima, LM
Lisa, MA
Liu, F
Liu, H
Liu, J
Ljubicic, T
Llope, WJ
Longacre, RS
Lu, Y
Lukashov, EV
Luo, X
Ma, GL
Ma, YG
Mahapatra, DP
Majka, R
Mall, OI
Manweiler, R
Margetis, S
Markert, C
Masui, H
Matis, HS
McDonald, D
McShane, TS
Meschanin, A
Milner, R
Minaev, NG
Mioduszewski, S
Mitrovski, MK
Mohammed, Y
Mohanty, B
Mondal, MM
Morozov, B
Morozov, DA
Munhoz, MG
Mustafa, MK
Naglis, M
Nandi, BK
Nayak, TK
Nogach, LV
Nurushev, SB
Odyniec, G
Ogawa, A
Oh, K
Ohlson, A
Okorokov, V
Oldag, EW
Oliveira, RAN
Olson, D
Pachr, M
Page, BS
Pal, SK
Pandit, Y
Panebratsev, Y
Pawlak, T
Pei, H
Peitzmann, T
Perkins, C
Peryt, W
Pile, P
Planinic, M
Ploskon, MA
Pluta, J
Plyku, D
Poljak, N
Porter, J
Poskanzer, AM
Potukuchi, BVKS
Powell, CB
Prindle, D
Pruneau, C
Pruthi, NK
Pujahari, PR
Putschke, J
Qiu, H
Raniwala, R
Raniwala, S
Ray, RL
Redwine, R
Reed, R
Ritter, HG
Roberts, JB
Rogachevskiy, OV
Romero, JL
Ruan, L
Rusnak, J
Sahoo, NR
Sakrejda, I
Salur, S
Sandweiss, J
Sangaline, E
Sarkar, A
Schambach, J
Scharenberg, RP
Schaub, J
Schmah, AM
Schmitz, N
Schuster, TR
Seele, J
Seger, J
Selyuzhenkov, I
Seyboth, P
Shah, N
Shahaliev, E
Shao, M
Sharma, M
Shi, SS
Shou, QY
Sichtermann, EP
Simon, F
Singaraju, RN
Skoby, MJ
Smirnov, N
Solanki, D
Sorensen, P
deSouza, UG
Spinka, HM
Srivastava, B
Stanislaus, TDS
Steadman, SG
Stevens, JR
Stock, R
Strikhanov, M
Stringfellow, B
Suaide, AAP
Suarez, MC
Subba, NL
Sumbera, M
Sun, XM
Sun, Y
Sun, Z
Surrow, B
Svirida, DN
Symons, TJM
de Toledo, AS
Takahashi, J
Tang, AH
Tang, Z
Tarini, LH
Tarnowsky, T
Thein, D
Thomas, JH
Tian, J
Timmins, AR
Tlusty, D
Tokarev, M
Trainor, TA
Trentalange, S
Tribble, RE
Tribedy, P
Trzeciak, BA
Tsai, OD
Ullrich, T
Underwood, DG
Van Buren, G
van Nieuwenhuizen, G
Vanfossen, JA
Varma, R
Vasconcelos, GMS
Vasiliev, AN
Videbaek, F
Viyogi, YP
Vokal, S
Voloshin, SA
Wada, M
Walker, M
Wang, F
Wang, G
Wang, H
Wang, JS
Wang, Q
Wang, XL
Wang, Y
Webb, G
Webb, JC
Westfall, GD
Whitten, C
Wieman, H
Wissink, SW
Witt, R
Witzke, W
Wu, YF
Xiao, Z
Xie, W
Xu, H
Xu, N
Xu, QH
Xu, W
Xu, Y
Xu, Z
Xue, L
Yang, Y
Yang, Y
Yepes, P
Yip, K
Yoo, IK
Zawisza, M
Zbroszczyk, H
Zhan, W
Zhang, JB
Zhang, S
Zhang, WM
Zhang, XP
Zhang, Y
Zhang, ZP
Zhao, F
Zhao, J
Zhong, C
Zhu, X
Zhu, YH
Zoulkarneeva, Y
AF Agakishiev, G.
Aggarwal, M. M.
Ahammed, Z.
Alakhverdyants, A. V.
Alekseev, I.
Alford, J.
Anderson, B. D.
Anson, C. D.
Arkhipkin, D.
Averichev, G. S.
Balewski, J.
Beavis, D. R.
Behera, N. K.
Bellwied, R.
Betancourt, M. J.
Betts, R. R.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Bland, L. C.
Bordyuzhin, I. G.
Borowski, W.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Bridgeman, A.
Brovko, S. G.
Bruna, E.
Bueltmann, S.
Bunzarov, I.
Burton, T. P.
Cai, X. Z.
Caines, H.
de la Barca Sanchez, M. Calderon
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Chen, L.
Cheng, J.
Cherney, M.
Chikanian, A.
Choi, K. E.
Christie, W.
Chung, P.
Codrington, M. J. M.
Corliss, R.
Cramer, J. G.
Crawford, H. J.
Leyva, A. Davila
De Silva, L. C.
Debbe, R. R.
Dedovich, T. G.
Deng, J.
Derevschikov, A. A.
de Souza, R. Derradi
Didenko, L.
Djawotho, P.
Dogra, S. M.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Du, C. M.
Dunlop, J. C.
Efimov, L. G.
Elnimr, M.
Engelage, J.
Eppley, G.
Estienne, M.
Eun, L.
Evdokimov, O.
Fatemi, R.
Fedorisin, J.
Fersch, R. G.
Filip, P.
Finch, E.
Fine, V.
Fisyak, Y.
Gagliardi, C. A.
Geurts, F.
Ghosh, P.
Gorbunov, Y. N.
Gordon, A.
Grebenyuk, O. G.
Grosnick, D.
Gupta, A.
Gupta, S.
Guryn, W.
Haag, B.
Hajkova, O.
Hamed, A.
Han, L-X
Harris, J. W.
Hays-Wehle, J. P.
Heinz, M.
Heppelmann, S.
Hirsch, A.
Hjort, E.
Hoffmann, G. W.
Hofman, D. J.
Huang, B.
Huang, H. Z.
Humanic, T. J.
Huo, L.
Igo, G.
Jacobs, P.
Jacobs, W. W.
Jena, C.
Jin, F.
Joseph, J.
Judd, E. G.
Kabana, S.
Kang, K.
Kapitan, J.
Kauder, K.
Ke, H. W.
Keane, D.
Kechechyan, A.
Kettler, D.
Kikola, D. P.
Kiryluk, J.
Kisiel, A.
Kizka, V.
Klein, S. R.
Knospe, A. G.
Koetke, D. D.
Kollegger, T.
Konzer, J.
Koralt, I.
Koroleva, L.
Korsch, W.
Kotchenda, L.
Kouchpil, V.
Kravtsov, P.
Krueger, K.
Krus, M.
Kumar, L.
Lamont, M. A. C.
Landgraf, J. M.
LaPointe, S.
Lauret, J.
Lebedev, A.
Lednicky, R.
Lee, J. H.
Leight, W.
LeVine, M. J.
Li, C.
Li, L.
Li, N.
Li, W.
Li, X.
Li, X.
Li, Y.
Li, Z. M.
Lima, L. M.
Lisa, M. A.
Liu, F.
Liu, H.
Liu, J.
Ljubicic, T.
Llope, W. J.
Longacre, R. S.
Lu, Y.
Lukashov, E. V.
Luo, X.
Ma, G. L.
Ma, Y. G.
Mahapatra, D. P.
Majka, R.
Mall, O. I.
Manweiler, R.
Margetis, S.
Markert, C.
Masui, H.
Matis, H. S.
McDonald, D.
McShane, T. S.
Meschanin, A.
Milner, R.
Minaev, N. G.
Mioduszewski, S.
Mitrovski, M. K.
Mohammed, Y.
Mohanty, B.
Mondal, M. M.
Morozov, B.
Morozov, D. A.
Munhoz, M. G.
Mustafa, M. K.
Naglis, M.
Nandi, B. K.
Nayak, T. K.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Oh, K.
Ohlson, A.
Okorokov, V.
Oldag, E. W.
Oliveira, R. A. N.
Olson, D.
Pachr, M.
Page, B. S.
Pal, S. K.
Pandit, Y.
Panebratsev, Y.
Pawlak, T.
Pei, H.
Peitzmann, T.
Perkins, C.
Peryt, W.
Pile, P.
Planinic, M.
Ploskon, M. A.
Pluta, J.
Plyku, D.
Poljak, N.
Porter, J.
Poskanzer, A. M.
Potukuchi, B. V. K. S.
Powell, C. B.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Pujahari, P. R.
Putschke, J.
Qiu, H.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Redwine, R.
Reed, R.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Ruan, L.
Rusnak, J.
Sahoo, N. R.
Sakrejda, I.
Salur, S.
Sandweiss, J.
Sangaline, E.
Sarkar, A.
Schambach, J.
Scharenberg, R. P.
Schaub, J.
Schmah, A. M.
Schmitz, N.
Schuster, T. R.
Seele, J.
Seger, J.
Selyuzhenkov, I.
Seyboth, P.
Shah, N.
Shahaliev, E.
Shao, M.
Sharma, M.
Shi, S. S.
Shou, Q. Y.
Sichtermann, E. P.
Simon, F.
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Solanki, D.
Sorensen, P.
deSouza, U. G.
Spinka, H. M.
Srivastava, B.
Stanislaus, T. D. S.
Steadman, S. G.
Stevens, J. R.
Stock, R.
Strikhanov, M.
Stringfellow, B.
Suaide, A. A. P.
Suarez, M. C.
Subba, N. L.
Sumbera, M.
Sun, X. M.
Sun, Y.
Sun, Z.
Surrow, B.
Svirida, D. N.
Symons, T. J. M.
de Toledo, A. Szanto
Takahashi, J.
Tang, A. H.
Tang, Z.
Tarini, L. H.
Tarnowsky, T.
Thein, D.
Thomas, J. H.
Tian, J.
Timmins, A. R.
Tlusty, D.
Tokarev, M.
Trainor, T. A.
Trentalange, S.
Tribble, R. E.
Tribedy, P.
Trzeciak, B. A.
Tsai, O. D.
Ullrich, T.
Underwood, D. G.
Van Buren, G.
van Nieuwenhuizen, G.
Vanfossen, J. A., Jr.
Varma, R.
Vasconcelos, G. M. S.
Vasiliev, A. N.
Videbaek, F.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Wada, M.
Walker, M.
Wang, F.
Wang, G.
Wang, H.
Wang, J. S.
Wang, Q.
Wang, X. L.
Wang, Y.
Webb, G.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wissink, S. W.
Witt, R.
Witzke, W.
Wu, Y. F.
Xiao, Z.
Xie, W.
Xu, H.
Xu, N.
Xu, Q. H.
Xu, W.
Xu, Y.
Xu, Z.
Xue, L.
Yang, Y.
Yang, Y.
Yepes, P.
Yip, K.
Yoo, I-K.
Zawisza, M.
Zbroszczyk, H.
Zhan, W.
Zhang, J. B.
Zhang, S.
Zhang, W. M.
Zhang, X. P.
Zhang, Y.
Zhang, Z. P.
Zhao, F.
Zhao, J.
Zhong, C.
Zhu, X.
Zhu, Y. H.
Zoulkarneeva, Y.
CA Star Collaboration
TI rho(0) photoproduction in AuAu collisions at root s(NN)=62.4 GeV
measured with the STAR detector
SO PHYSICAL REVIEW C
LA English
DT Article
ID HEAVY-ION COLLISIONS; TIME PROJECTION CHAMBER; PHYSICS; SATURATION; HERA
AB Vector mesons may be photoproduced in relativistic heavy-ion collisions when a virtual photon emitted by one nucleus scatters from the other nucleus, emerging as a vector meson. The STAR Collaboration has previously presented measurements of coherent rho(0) photoproduction at center of mass energies of 130 GeV and 200 GeV in AuAu collisions. Here, we present a measurement of the cross section at 62.4 GeV; we find that the cross section for coherent rho(0) photoproduction with nuclear breakup is 10.5 +/- 1.5 +/- 1.6mb at 62.4 GeV. The cross-section ratio between 200 GeV and 62.4 GeV is 4.4 +/- 0.6, less than is predicted by most theoretical models. It is, however, proportionally much larger than the previously observed 15% +/- 55% increase between 130 GeV and 200 GeV.
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[Arkhipkin, D.; Beavis, D. R.; Bland, L. C.; Burton, T. P.; Christie, W.; Debbe, R. R.; Didenko, L.; Dunlop, J. C.; Fine, V.; Fisyak, Y.; Gordon, A.; Grebenyuk, O. G.; Guryn, W.; Lamont, M. A. C.; Landgraf, J. M.; Lauret, J.; Lebedev, A.; Lee, J. H.; LeVine, M. J.; Ljubicic, T.; Longacre, R. S.; Mitrovski, M. K.; Ogawa, A.; Pile, P.; Ruan, L.; Sorensen, P.; Tang, A. H.; Ullrich, T.; Van Buren, G.; Videbaek, F.; Webb, J. C.; Xu, Z.; Yip, K.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Crawford, H. J.; Engelage, J.; Judd, E. G.; Perkins, C.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
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[Cendejas, R.; Huang, H. Z.; Igo, G.; Shah, N.; Trentalange, S.; Tsai, O. D.; Wang, G.; Whitten, C., Jr.; Xu, W.; Zhao, F.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
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[Bielcik, J.; Hajkova, O.; Krus, M.; Pachr, M.] Czech Tech Univ, FNSPE, CZ-11519 Prague, Czech Republic.
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[Kollegger, T.; Schuster, T. R.; Stock, R.] Goethe Univ Frankfurt, Frankfurt, Germany.
[Jena, C.; Mahapatra, D. P.] Inst Phys, Bhubaneswar 751005, Orissa, India.
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[Jacobs, W. W.; Page, B. S.; Selyuzhenkov, I.; Stevens, J. R.; Wissink, S. W.] Indiana Univ, Bloomington, IN 47408 USA.
[Alekseev, I.; Bordyuzhin, I. G.; Koroleva, L.; Morozov, B.; Svirida, D. N.] Alikhanov Inst Theoret & Expt Phys, Moscow, Russia.
[Bhasin, A.; Dogra, S. M.; Gupta, S.; Potukuchi, B. V. K. S.] Univ Jammu, Jammu 180001, India.
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[Fatemi, R.; Fersch, R. G.; Korsch, W.; Webb, G.; Witzke, W.] Univ Kentucky, Lexington, KY 40506 USA.
[Du, C. M.; Qiu, H.; Sun, Z.; Wang, J. S.; Xu, H.; Yang, Y.; Zhan, W.] Inst Modern Phys, Lanzhou, Peoples R China.
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[Balewski, J.; Betancourt, M. J.; Corliss, R.; Hays-Wehle, J. P.; Leight, W.; Milner, R.; Redwine, R.; Seele, J.; Steadman, S. G.; Surrow, B.; van Nieuwenhuizen, G.; Walker, M.] MIT, Cambridge, MA 02139 USA.
[Schmitz, N.; Seyboth, P.; Simon, F.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Tarnowsky, T.; Wang, H.; Westfall, G. D.] Michigan State Univ, E Lansing, MI 48824 USA.
[Brandin, A. V.; Kotchenda, L.; Kravtsov, P.; Lukashov, E. V.; Okorokov, V.; Strikhanov, M.] Moscow Engn Phys Inst, Moscow 115409, Russia.
[Braidot, E.; Peitzmann, T.] Univ Utrecht, Amsterdam, Netherlands.
[Braidot, E.; Peitzmann, T.] NIKHEF H, NL-1009 DB Amsterdam, Netherlands.
[Anson, C. D.; Humanic, T. J.; Lisa, M. A.] Ohio State Univ, Columbus, OH 43210 USA.
[Bueltmann, S.; Koralt, I.; Plyku, D.] Old Dominion Univ, Norfolk, VA 23529 USA.
[Aggarwal, M. M.; Bhati, A. K.; Pruthi, N. K.] Panjab Univ, Chandigarh 160014, India.
[Eun, L.; Heppelmann, S.] Penn State Univ, University Pk, PA 16802 USA.
[Derevschikov, A. A.; Meschanin, A.; Minaev, N. G.; Morozov, D. A.; Nogach, L. V.; Nurushev, S. B.; Vasiliev, A. N.] Inst High Energy Phys, Protvino, Russia.
[Hirsch, A.; Kikola, D. P.; Konzer, J.; Li, X.; Mustafa, M. K.; Scharenberg, R. P.; Skoby, M. J.; Srivastava, B.; Stringfellow, B.; Wang, F.; Wang, Q.; Xie, W.] Purdue Univ, W Lafayette, IN 47907 USA.
[Choi, K. E.; Oh, K.; Yoo, I-K.] Pusan Natl Univ, Pusan 609735, South Korea.
[Raniwala, R.; Raniwala, S.; Solanki, D.] Univ Rajasthan, Jaipur 302004, Rajasthan, India.
[Eppley, G.; Geurts, F.; Liu, J.; Llope, W. J.; McDonald, D.; Roberts, J. B.; Yepes, P.] Rice Univ, Houston, TX 77251 USA.
[Lima, L. M.; Munhoz, M. G.; Oliveira, R. A. N.; deSouza, U. G.; Suaide, A. A. P.; de Toledo, A. Szanto] Univ Sao Paulo, Sao Paulo, Brazil.
[Chen, H. F.; Huang, B.; Li, C.; Lu, Y.; Luo, X.; Shao, M.; Sun, Y.; Tang, Z.; Wang, X. L.; Xu, Y.; Zhang, Z. P.] Univ Sci & Technol China, Hefei 230026, Peoples R China.
[Deng, J.; Li, X.; Xu, Q. H.] Shandong Univ, Jinan 250100, Shandong, Peoples R China.
[Cai, X. Z.; Chen, J. H.; Han, L-X; Jin, F.; Li, W.; Ma, G. L.; Ma, Y. G.; Shou, Q. Y.; Tian, J.; Xue, L.; Zhang, S.; Zhao, J.; Zhong, C.; Zhu, Y. H.] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
[Borowski, W.; Estienne, M.; Kabana, S.] SUBATECH, Nantes, France.
[Cervantes, M. C.; Codrington, M. J. M.; Djawotho, P.; Drachenberg, J. L.; Gagliardi, C. A.; Hamed, A.; Huo, L.; Mioduszewski, S.; Mohammed, Y.; Tribble, R. E.] Texas A&M Univ, College Stn, TX 77843 USA.
[Leyva, A. Davila; Hoffmann, G. W.; Li, L.; Markert, C.; Oldag, E. W.; Ray, R. L.; Schambach, J.; Thein, D.; Wada, M.] Univ Texas Austin, Austin, TX 78712 USA.
[Bellwied, R.; De Silva, L. C.; Timmins, A. R.] Univ Houston, Houston, TX 77204 USA.
[Cheng, J.; Kang, K.; Li, Y.; Wang, Y.; Xiao, Z.; Zhang, X. P.; Zhu, X.] Tsinghua Univ, Beijing 100084, Peoples R China.
[Witt, R.] USN Acad, Annapolis, MD 21402 USA.
[Gupta, A.; Koetke, D. D.; Manweiler, R.; Schaub, J.; Stanislaus, T. D. S.] Valparaiso Univ, Valparaiso, IN 46383 USA.
[Ahammed, Z.; Chattopadhyay, S.; Ghosh, P.; Mohanty, B.; Mondal, M. M.; Nayak, T. K.; Pal, S. K.; Sahoo, N. R.; Singaraju, R. N.; Tribedy, P.; Viyogi, Y. P.] Ctr Variable Energy Cyclotron, Kolkata 700064, India.
[Kisiel, A.; Pawlak, T.; Peryt, W.; Pluta, J.; Trzeciak, B. A.; Zawisza, M.; Zbroszczyk, H.] Warsaw Univ Technol, Warsaw, Poland.
[Bichsel, H.; Cramer, J. G.; Kettler, D.; Prindle, D.; Trainor, T. A.] Univ Washington, Seattle, WA 98195 USA.
[Elnimr, M.; LaPointe, S.; Pruneau, C.; Sharma, M.; Tarini, L. H.; Voloshin, S. A.] Wayne State Univ, Detroit, MI 48201 USA.
[Chen, J. Y.; Chen, L.; Ke, H. W.; Li, N.; Li, Z. M.; Liu, F.; Shi, S. S.; Wu, Y. F.; Yang, Y.; Zhang, J. B.] CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China.
[Bruna, E.; Caines, H.; Chikanian, A.; Finch, E.; Harris, J. W.; Heinz, M.; Knospe, A. G.; Majka, R.; Ohlson, A.; Putschke, J.; Sandweiss, J.; Smirnov, N.] Yale Univ, New Haven, CT 06520 USA.
[Planinic, M.; Poljak, N.] Univ Zagreb, HR-10002 Zagreb, Croatia.
RP Agakishiev, G (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Ma, Yu-Gang/M-8122-2013; Strikhanov, Mikhail/P-7393-2014; Xu,
Wenqin/H-7553-2014; XIAO, Zhigang/C-3788-2015; Aparecido Negrao de
Oliveira, Renato/G-9133-2015; Bruna, Elena/C-4939-2014; Dogra, Sunil
/B-5330-2013; Chaloupka, Petr/E-5965-2012; Huang, Bingchu/H-6343-2015;
Derradi de Souza, Rafael/M-4791-2013; Suaide, Alexandre/L-6239-2016;
Svirida, Dmitry/R-4909-2016; Inst. of Physics, Gleb
Wataghin/A-9780-2017; Okorokov, Vitaly/C-4800-2017; Alekseev,
Igor/J-8070-2014; Planinic, Mirko/E-8085-2012; Yoo, In-Kwon/J-6222-2012;
Peitzmann, Thomas/K-2206-2012; Witt, Richard/H-3560-2012; Takahashi,
Jun/B-2946-2012; Yip, Kin/D-6860-2013; Xue, Liang/F-8077-2013; Voloshin,
Sergei/I-4122-2013; Lednicky, Richard/K-4164-2013; Yang,
Yanyun/B-9485-2014; Rusnak, Jan/G-8462-2014; Bielcikova,
Jana/G-9342-2014; Sumbera, Michal/O-7497-2014
OI Ma, Yu-Gang/0000-0002-0233-9900; Strikhanov,
Mikhail/0000-0003-2586-0405; Xu, Wenqin/0000-0002-5976-4991; Bruna,
Elena/0000-0001-5427-1461; Huang, Bingchu/0000-0002-3253-3210; Derradi
de Souza, Rafael/0000-0002-2084-7001; Suaide,
Alexandre/0000-0003-2847-6556; Okorokov, Vitaly/0000-0002-7162-5345;
Alekseev, Igor/0000-0003-3358-9635; Peitzmann,
Thomas/0000-0002-7116-899X; Takahashi, Jun/0000-0002-4091-1779; Yip,
Kin/0000-0002-8576-4311; Xue, Liang/0000-0002-2321-9019; Yang,
Yanyun/0000-0002-5982-1706; Sumbera, Michal/0000-0002-0639-7323
FU RHIC Operations Group; RCF at BNL; NERSC Center at LBNL; Open Science
Grid consortium; Office of NP within the US DOE Office of Science; US
NSF; Sloan Foundation; DFG cluster of excellence "Origin and Structure
of the Universe" of Germany; CNRS/IN2P3; FAPESP CNPq of Brazil; Ministry
of Education and Science of the Russian Federation; NNSFC; CAS; MoST;
MoE of China; GA and MSMT of the Czech Republic; FOM; NWO of the
Netherlands; DAE; DST; CSIR of India; Polish Ministry of Science and
Higher Education; Korea Research Foundation; Ministry of Science,
Education, and Sports of the Republic of Croatia; RosAtom of Russia;
Office of HEP within the US DOE Office of Science
FX We thank Mark Strikman, M. Zhalov, and M. V. T. Machado for providing
theoretical photoproduction cross sections at 62.4 and 130 GeV. We thank
the RHIC Operations Group and RCF at BNL, the NERSC Center at LBNL, and
the Open Science Grid consortium for providing resources and support.
This work was supported in part by the Offices of NP and HEP within the
US DOE Office of Science, the US NSF, the Sloan Foundation, the DFG
cluster of excellence "Origin and Structure of the Universe" of Germany,
CNRS/IN2P3, FAPESP CNPq of Brazil, Ministry of Education and Science of
the Russian Federation, NNSFC, CAS, MoST, and MoE of China, GA and MSMT
of the Czech Republic, FOM and NWO of the Netherlands, DAE, DST, and
CSIR of India, Polish Ministry of Science and Higher Education, Korea
Research Foundation, Ministry of Science, Education, and Sports of the
Republic of Croatia, and RosAtom of Russia.
NR 28
TC 12
Z9 12
U1 1
U2 16
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 JAN 30
PY 2012
VL 85
IS 1
AR 014910
DI 10.1103/PhysRevC.85.014910
PG 7
WC Physics, Nuclear
SC Physics
GA 887IP
UT WOS:000299920400008
ER
PT J
AU Hull, AJ
AF Hull, Andrew J.
TI Elastic response of a cylinder containing longitudinal stiffeners
SO JOURNAL OF SOUND AND VIBRATION
LA English
DT Article
ID THIN CYLINDRICAL-SHELL; WAVE-PROPAGATION; FREE-VIBRATION
AB This paper develops a three-dimensional analytical model of a cylinder that contains a longitudinal stiffener. The model begins with the equations of motion for a fully elastic solid that produces displacement fields with unknown wave propagation coefficients. These are inserted into stress and displacement equations at the cylinder boundaries and at the location of the stiffener. Orthogonalization of these equations produces an infinite number of indexed algebraic equations that can be truncated and incorporated into a global matrix equation. Solving this equation yields the solution to the wave propagation coefficients and allows the system's displacements and stresses to be calculated. The model is verified by comparison of the results of a plane strain analysis example to a solution generated using finite element theory. A three-dimensional example problem is formulated and the displacement results are illustrated. The inclusion of multiple stiffeners is discussed. Published by Elsevier Ltd.
C1 USN, Autonomous & Defens Syst Dept, Undersea Warfare Ctr Div, Newport, RI 02841 USA.
RP Hull, AJ (reprint author), USN, Autonomous & Defens Syst Dept, Undersea Warfare Ctr Div, Newport, RI 02841 USA.
EM andrew.hull@navy.mil
FU Naval Undersea Warfare Center (NUWC)
FX This report was funded by the Naval Undersea Warfare Center's (NUWC)
In-House Laboratory Independent Research (ILIR) Program, program manager
Anthony A. Ruffa. The author wishes to thank Anthony S. Poirier for
providing the finite element analysis results.
NR 13
TC 1
Z9 1
U1 1
U2 3
PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
PI LONDON
PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
SN 0022-460X
J9 J SOUND VIB
JI J. Sound Vibr.
PD JAN 30
PY 2012
VL 331
IS 3
BP 588
EP 604
DI 10.1016/j.jsv.2011.09.012
PG 17
WC Acoustics; Engineering, Mechanical; Mechanics
SC Acoustics; Engineering; Mechanics
GA 852YY
UT WOS:000297394600007
ER
PT J
AU Putzke, C
Coldea, AI
Guillamon, I
Vignolles, D
McCollam, A
LeBoeuf, D
Watson, MD
Mazin, II
Kasahara, S
Terashima, T
Shibauchi, T
Matsuda, Y
Carrington, A
AF Putzke, C.
Coldea, A. I.
Guillamon, I.
Vignolles, D.
McCollam, A.
LeBoeuf, D.
Watson, M. D.
Mazin, I. I.
Kasahara, S.
Terashima, T.
Shibauchi, T.
Matsuda, Y.
Carrington, A.
TI de Haas-van Alphen Study of the Fermi Surfaces of Superconducting LiFeP
and LiFeAs
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB We report a de Haas-van Alphen oscillation study of the 111 iron pnictide superconductors LiFeAs with T-c approximate to 18 Kand LiFeP with T-c approximate to 5 K. We find that for both compounds the Fermi surface topology is in good agreement with density functional band-structure calculations and has almost nested electron and hole bands. The effective masses generally showsignificant enhancement, up to similar to 3 for LiFeP and similar to 5 for LiFeAs. However, one hole Fermi surface in LiFeP shows a very small enhancement, as compared with its other sheets. This difference probably results from k-dependent coupling to spin fluctuations and may be the origin of the different nodal and nodeless superconducting gap structures in LiFeP and LiFeAs, respectively.
C1 [Coldea, A. I.; Watson, M. D.] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England.
[Putzke, C.; Guillamon, I.; Carrington, A.] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
[Vignolles, D.; LeBoeuf, D.] CNRS, Lab Natl Champs Magnet Intenses, Toulouse, France.
[McCollam, A.] Radboud Univ Nijmegen, IMM, High Field Magnet Lab, NL-6525 ED Nijmegen, Netherlands.
[Mazin, I. I.] USN, Res Lab, Washington, DC 20375 USA.
[Kasahara, S.; Terashima, T.] Kyoto Univ, Res Ctr Low Temp & Mat Sci, Sakyo Ku, Kyoto 6068501, Japan.
[Shibauchi, T.; Matsuda, Y.] Kyoto Univ, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan.
RP Coldea, AI (reprint author), Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England.
EM amalia.coldea@physics.ox.ac.uk; a.carrington@bristol.ac.uk
RI Shibauchi, Takasada/B-9349-2008; Kasahara, Shigeru/H-3064-2014;
Guillamon, Isabel/C-9744-2014; McCollam, Alix/F-9697-2015; Coldea,
Amalia/C-1106-2013
OI Watson, Matthew/0000-0002-0737-2814; Shibauchi,
Takasada/0000-0001-5831-4924; Kasahara, Shigeru/0000-0002-6007-9617;
Guillamon, Isabel/0000-0002-2606-3355;
FU EPSRC (UK); EuroMagNET II under EU [228043]; JSPS; National Science
Foundation [DMR-0654118]; State of Florida; U.S. Department of Energy
FX We thank E. Kampert, F. Wolff-Fabris, E. A. Yelland, F. Fabrizi, E.
Choi, and A. Bangura for technical assistance and S. Borisenko for
discussions. This work is supported by EPSRC (UK), EuroMagNET II under
the EU Contract No. 228043, and KAKENHI from JSPS. A portion of this
work was performed at the National High Magnetic Field Laboratory, which
is supported by National Science Foundation Cooperative Agreement No.
DMR-0654118, the State of Florida, and the U.S. Department of Energy.
NR 21
TC 43
Z9 42
U1 2
U2 51
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JAN 26
PY 2012
VL 108
IS 4
AR 047002
DI 10.1103/PhysRevLett.108.047002
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 886CH
UT WOS:000299828100018
PM 22400881
ER
PT J
AU Algar, WR
Wegner, D
Huston, AL
Blanco-Canosa, JB
Stewart, MH
Armstrong, A
Dawson, PE
Hildebrandt, N
Medintz, IL
AF Algar, W. Russ
Wegner, David
Huston, Alan L.
Blanco-Canosa, Juan B.
Stewart, Michael H.
Armstrong, Anika
Dawson, Philip E.
Hildebrandt, Niko
Medintz, Igor L.
TI Quantum Dots as Simultaneous Acceptors and Donors in Time-Gated Forster
Resonance Energy Transfer Relays: Characterization and Biosensing
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID INTRACELLULAR DELIVERY; MOLECULAR BEACONS; IN-VIVO; HYBRIDIZATION;
NANOCRYSTALS; NANOSENSOR; STRATEGIES; STABILITY; CHEMISTRY; PEPTIDES
AB The unique photophysical properties of semiconductor quantum dot (QD) bioconjugates offer many advantages for active sensing, imaging, and optical diagnostics. In particular, QDs have been widely adopted as either donors or acceptors in Forster resonance energy transfer (FRET)based assays and biosensors. Here, we expand their utility by demonstrating that QDs can function in a simultaneous role as acceptors and donors within time-gated FRET relays. To achieve this configuration, the QD was used as a central nanoplatform and coassembled with peptides or oligonucleotides that were labeled with either a long lifetime luminescent terbium(III) complex (Tb) or a fluorescent dye, Alexa Fluor 647 (A647). Within the FRET relay, the QD served as a critical intermediary where (1) an excited-state Tb donor transferred energy to the ground-state QD following a suitable microsecond delay and (2) the QD subsequently transferred that energy to an A647 acceptor. A detailed photophysical analysis was undertaken for each step of the FRET relay. The assembly of increasing ratios of Tb/QD was found to linearly increase the magnitude of the FRET-sensitized time-gated QD photoluminescence intensity. Importantly, the Tb was found to sensitize the subsequent QD A647 donor acceptor FRET pair without significantly affecting the intrinsic energy transfer efficiency within the second step in the relay. The utility of incorporating QDs into this type of time-gated energy transfer configuration was demonstrated in prototypical bioassays for monitoring protease activity and nucleic acid hybridization; the latter included a dual target format where each orthogonal FRET step transduced a separate binding event. Potential benefits of this time-gated FRET approach include: eliminating background fluorescence, accessing two approximately independent FRET mechanisms in a single QD-bioconjugate, and multiplexed biosensing based on spectrotemporal resolution of QD-FRET without requiring multiple colors of QD.
C1 [Algar, W. Russ; Medintz, Igor L.] USN, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC 20375 USA.
[Huston, Alan L.; Stewart, Michael H.; Armstrong, Anika] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
[Algar, W. Russ] George Mason Univ, Coll Sci, Fairfax, VA 22030 USA.
[Wegner, David; Hildebrandt, Niko] Univ Paris 11, Inst Elect Fondamentale, F-91405 Orsay, France.
[Blanco-Canosa, Juan B.; Dawson, Philip E.] Scripps Res Inst, Dept Chem, La Jolla, CA 92037 USA.
[Blanco-Canosa, Juan B.; Dawson, Philip E.] Scripps Res Inst, Dept Cell Biol, La Jolla, CA 92037 USA.
[Armstrong, Anika] Sotera Def Solut, Crofton, MD 21114 USA.
RP Medintz, IL (reprint author), USN, Res Lab, Ctr Bio Mol Sci & Engn, Code 6900, Washington, DC 20375 USA.
EM Igor.medintz@nrl.navy.mil
FU DTRA; DARPA; ONR; NRL; NRL-NSI; European Commission; Innovative
Medicines Initiative (IMI); Natural Sciences and Engineering Research
Council of Canada (NSERC)
FX The authors thank Lumiphore, Inc. for providing the Lumi4- Tb complex
and Invitrogen by Life Technologies for the QDs. The authors acknowledge
DTRA, DARPA, ONR, NRL, the NRL-NSI, the European Commission (FP7 project
NANOG-NOSTICS), and the Innovative Medicines Initiative (IMI project
OncoTrack) for financial support. W.R.A. is grateful to the Natural
Sciences and Engineering Research Council of Canada (NSERC) for a
postdoctoral fellowship.
NR 67
TC 123
Z9 123
U1 12
U2 255
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 JAN 25
PY 2012
VL 134
IS 3
BP 1876
EP 1891
DI 10.1021/ja210162f
PG 16
WC Chemistry, Multidisciplinary
SC Chemistry
GA 903AD
UT WOS:000301084400076
PM 22220737
ER
PT J
AU Bates, JW
AF Bates, J. W.
TI On the theory of a shock wave driven by a corrugated piston in a
non-ideal fluid
SO JOURNAL OF FLUID MECHANICS
LA English
DT Article
DE absolute/convective instability; general fluid mechanics; shock waves
ID STEP SHOCKS; STABILITY; PHASE
AB In the context of an Eulerian fluid description, we investigate the dynamics of a shock wave that is driven by the steady impulsively initiated motion of a two-dimensional planar piston with small corrugations superimposed on its surface. This problem was originally solved by Freeman (Proc. Royal Soc. A, vol. 228, 1955, pp. 341-362), who showed that piston-driven shocks are unconditionally stable when the fluid medium through which they propagate is an ideal gas. Here, we generalize Freeman's mathematical framework to account for a fluid characterized by an arbitrary equation of state. We find that a sufficient condition for shock stability is -1 < h < h(c), where h is the D'yakov parameter and h(c) is a critical value less than unity. For values of h within this range, linear perturbations imparted to the front by the piston at time t = 0 attenuate asymptotically as t(-3/2). Outside of this range, the temporal behaviour of perturbations is more difficult to determine and further analysis is required to assess the stability of a shock front under such circumstances. As a benchmark of the main conclusions of this paper, we compare our generalized expression for the linearized shock-ripple amplitude with an independent Bessel-series solution derived by Zaidel' (J. Appl. Math. Mech., vol. 24, 1960, pp. 316-327) and find excellent agreement.
C1 USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Bates, JW (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
EM jason.bates@nrl.navy.mil
FU National Nuclear Security Administration of the United States Department
of Energy
FX This work was supported by the National Nuclear Security Administration
of the United States Department of Energy.
NR 43
TC 4
Z9 4
U1 0
U2 3
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0022-1120
J9 J FLUID MECH
JI J. Fluid Mech.
PD JAN 25
PY 2012
VL 691
BP 146
EP 164
DI 10.1017/jfm.2011.463
PG 19
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 882VZ
UT WOS:000299593300007
ER
PT J
AU Shulman, I
Penta, B
Moline, MA
Haddock, SHD
Anderson, S
Oliver, MJ
Sakalaukus, P
AF Shulman, Igor
Penta, Bradley
Moline, Mark A.
Haddock, Steven H. D.
Anderson, Stephanie
Oliver, Matthew J.
Sakalaukus, Peter
TI Can vertical migrations of dinoflagellates explain observed
bioluminescence patterns during an upwelling event in Monterey Bay,
California?
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID HARMFUL ALGAL BLOOMS; MODEL; ASSIMILATION; ADAPTATIONS; SELECTION;
DYNAMICS; SYSTEMS
AB Extensive AUVs surveys showed that during the development of upwelling, bioluminescent dinoflagellates from the northern part of the Monterey Bay, California (called the upwelling shadow area), were able to avoid advection by southward flowing currents along the entrance to the Bay, while non-bioluminescent phytoplankton were advected by currents. It is known that vertical swimming of dinoflagellates to deeper layers helps them avoid losses due to advection. In the present paper, we investigate if modeling dinoflagellates' vertical swimming can explain the observed dinoflagellates' ability to avoid advection during the upwelling development. The dynamics of a dinoflagellate population is modeled with the tracer model with introduced vertical swimming velocity. Three swimming behaviors are considered: sinking, swimming to the target depth and diel vertical migration. Velocities in all swimming cases are considered in the ranges of documented velocities for the observed dinoflagellates species during the upwelling development in the Monterey Bay. Our modeling confirmed that observed bioluminescent dinoflagellates' avoidance of advection during the upwelling development can be explained by their vertical swimming ability. In the case of swimming with 20 m/day (which is half of observed maximum swimming velocity), around 40% of dinoflagellates population from the northern part of the Bay were advected along the entrance to the Bay in comparison to the case without swimming. This is in agreement with the ratio of around 45% of observed mean bioluminescence intensity at the entrance to the Bay to the observed mean intensity in the northern part of the Bay. This mechanism also helps explain the general persistence of dinoflagellates in this part of the coastline.
C1 [Shulman, Igor; Penta, Bradley; Anderson, Stephanie; Sakalaukus, Peter] USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
[Haddock, Steven H. D.] Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039 USA.
[Moline, Mark A.] Calif Polytech State Univ San Luis Obispo, Dept Biol Sci, Ctr Marine & Coastal Sci, San Luis Obispo, CA 93407 USA.
[Oliver, Matthew J.] Univ Delaware, Coll Earth Ocean & Environm, Lewes, DE 19958 USA.
RP Shulman, I (reprint author), USN, Res Lab, Div Oceanog, Bldg 1009, Stennis Space Ctr, MS 39529 USA.
EM igor.shulman@nrlssc.navy.mil
FU Naval Research Laboratory (NRL); Office of Naval Research
[N0001411WX20051, N0001410WX20482, N0001409AF00002, N0001410AF00002];
Department of Defense High Performance Computing Initiative
FX This research was funded through the Naval Research Laboratory (NRL)
projects, "Bio-optical studies of predictability and assimilation in the
coastal environment (BIOSPACE)" and "Modeling Dynamic Bio-Optical Layers
In Coastal Systems (DYaBOLIC)" under program element 61153N and grants
N0001411WX20051, N0001410WX20482, N0001409AF00002, and N0001410AF00002
sponsored by the Office of Naval Research, Marine Mammals and Biology
Program. We thank the anonymous reviewers, who provided very insightful
comments and recommendations to improve the paper. Computer time for the
numerical simulations was provided through a grant from the Department
of Defense High Performance Computing Initiative. This manuscript is NRL
contribution 7330-11-785.
NR 32
TC 4
Z9 4
U1 1
U2 22
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD JAN 25
PY 2012
VL 117
AR C01016
DI 10.1029/2011JC007480
PG 10
WC Oceanography
SC Oceanography
GA 884LG
UT WOS:000299706200001
ER
PT J
AU Stephan, AW
Picone, JM
Budzien, SA
Bishop, RL
Christensen, AB
Hecht, JH
AF Stephan, Andrew W.
Picone, J. Michael
Budzien, Scott A.
Bishop, Rebecca L.
Christensen, Andrew B.
Hecht, James H.
TI Measurement and application of the O II 61.7 nm dayglow
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID PHOTOIONIZATION CROSS-SECTIONS; ULTRAVIOLET SPECTROMETER; AIRGLOW;
OXYGEN; ATMOSPHERE; THRESHOLD; EMISSION; N-2
AB We present the first published measurement of an altitude profile of the O II 61.7 nm emission, a dayglow feature that can be used to monitor photoionization of O in the lower thermosphere. This photoionization process also results in the O II 83.4 nm emission that, unlike 61.7 nm, is resonantly scattered by ionospheric O+. Although ionospheric characteristics can be inferred from the shape and intensity of 83.4 nm altitude profiles, the interpretation can result in nonunique ion density profiles if the intensity of this source of photons that illuminates the ionosphere from below is unknown. The 61.7 nm emission provides a means to test the accuracy of current models used to calculate the intensity of that source. The data presented here were collected by the Remote Atmospheric and Ionospheric Detection System from the International Space Station on 29 October 2009. The measured 61.7 nm profiles show a steeper drop in intensity below 260 km, where the emission peaks, compared to our model calculations. While the current analysis cannot resolve if the discrepancy is caused by inaccuracies in our model thermospheric composition, photoabsorption cross sections, or both, a 15%-20% increase in the effective O-2 photoabsorption at 61.7 nm produces the best qualitative match to the measured profile. Ostensibly, 61.7 nm measurements could replace these model calculations as a more direct measure of the intensity of the 83.4 nm photon source region. In either case, accurate specification of local thermospheric neutral species remains an important component of daytime ionospheric remote sensing.
C1 [Stephan, Andrew W.; Budzien, Scott A.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[Picone, J. Michael] George Mason Univ, Sch Phys Astron & Computat Sci, Fairfax, VA 22030 USA.
[Bishop, Rebecca L.; Christensen, Andrew B.; Hecht, James H.] Aerosp Corp, Los Angeles, CA 90009 USA.
RP Stephan, AW (reprint author), USN, Div Space Sci, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM andrew.stephan@nrl.navy.mil
FU NRL Base Program work unit 76-9880; Office of Naval Research; Aerospace
Corporation
FX This work was supported by NRL Base Program work unit 76-9880. RAIDS is
part of the HICO-RAIDS Experiment Payload (HREP), integrated and flown
under the direction of the DOD Space Test Program. RAIDS is a joint
project of the Naval Research Laboratory and the Aerospace Corporation,
with support from the Office of Naval Research and the Aerospace
Corporation Independent Research and Development Program.
NR 28
TC 4
Z9 4
U1 1
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD JAN 25
PY 2012
VL 117
AR A01316
DI 10.1029/2011JA016897
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 884IV
UT WOS:000299699000001
ER
PT J
AU Dong, WD
Finkel, P
Amin, A
Lynch, CS
AF Dong, Wen D.
Finkel, Peter
Amin, Ahmed
Lynch, Christopher S.
TI Giant electro-mechanical energy conversion in [011] cut ferroelectric
single crystals
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ELECTRIC-FIELD; PMN-32-PERCENT-PT CRYSTALS; PIEZOELECTRIC PROPERTIES;
STRESS; PHASE; BEHAVIOR
AB Giant electro-mechanical energy conversion is demonstrated under a ferroelectric/ferroelectric phase transformation in [011] cut and poled lead titanate-based relaxor perovskite morphotropic single crystals. It is found that under mechanical pre-stress, a relatively small oscillatory stress drives the material reversibly between rhombohedral and orthorhombic phases with a remarkably high polarization and strain jump induced at zero bias electric field and room temperature. The measured electrical output per cycle is more than an order of magnitude larger than that reported for linear piezoelectric materials. Ideal thermodynamic cycles are presented for this electro-mechanical energy conversion followed by a presentation and discussion of the experimental data. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3679644]
C1 [Dong, Wen D.; Lynch, Christopher S.] Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Los Angeles, CA 90095 USA.
[Finkel, Peter; Amin, Ahmed] USN, Sensors & Sonar Syst Dept, Undersea Warfare Ctr Newport, Newport, RI 02841 USA.
RP Lynch, CS (reprint author), Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Los Angeles, CA 90095 USA.
EM cslynch@seas.ucla.edu
RI Lynch, Christopher/A-9886-2013
OI Lynch, Christopher/0000-0001-9989-7097
FU Naval Research Enterprise Intern Program
FX The authors gratefully acknowledge the support of the Naval Research
Enterprise Intern Program.
NR 13
TC 25
Z9 25
U1 2
U2 12
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 23
PY 2012
VL 100
IS 4
AR 042903
DI 10.1063/1.3679644
PG 3
WC Physics, Applied
SC Physics
GA 889HO
UT WOS:000300064500052
ER
PT J
AU Mahadik, NA
Stahlbush, RE
Ancona, MG
Imhoff, EA
Hobart, KD
Myers-Ward, RL
Eddy, CR
Gaskill, DK
Kub, FJ
AF Mahadik, Nadeemullah A.
Stahlbush, Robert E.
Ancona, M. G.
Imhoff, Eugene A.
Hobart, Karl D.
Myers-Ward, Rachael L.
Eddy, Charles R., Jr.
Gaskill, D. Kurt
Kub, Fritz J.
TI Observation of stacking faults from basal plane dislocations in highly
doped 4H-SiC epilayers
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID SIC PIN DIODES; CURRENT DENSITIES; SILICON-CARBIDE; GROWTH; DEGRADATION;
SITES
AB Stacking fault (SF) expansion from basal plane dislocations (BPDs) confined in highly doped 4H-SiC buffer layers is observed under high-power ultraviolet illumination (>1000 W/cm(2)). Once the SFs reach the active drift layers, grown above the buffer layers, they are seen to rapidly expand up to the sample surface where they can cause device degradation. BPD faulting in the buffer appears to have a carrier injection threshold. Carrier density simulations under various injection conditions and carrier lifetimes are used to establish the conditions of BPD faulting within the buffer layer that could prevent SF expansion into the drift layer. (C) 2012 American Institute of Physics. [doi:10.1063/1.3679609]
C1 [Mahadik, Nadeemullah A.; Stahlbush, Robert E.; Ancona, M. G.; Imhoff, Eugene A.; Hobart, Karl D.; Myers-Ward, Rachael L.; Eddy, Charles R., Jr.; Gaskill, D. Kurt; Kub, Fritz J.] USN, Res Lab, Washington, DC 20375 USA.
RP Mahadik, NA (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM mahadik@ccs.nrl.navy.mil
FU National Research Council
FX N. A. Mahadik would like to acknowledge the support of National Research
Council's Research Associateship Program.
NR 16
TC 8
Z9 8
U1 4
U2 27
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 23
PY 2012
VL 100
IS 4
AR 042102
DI 10.1063/1.3679609
PG 3
WC Physics, Applied
SC Physics
GA 889HO
UT WOS:000300064500033
ER
PT J
AU Lindsay, L
Broido, DA
AF Lindsay, L.
Broido, D. A.
TI Theory of thermal transport in multilayer hexagonal boron nitride and
nanotubes
SO PHYSICAL REVIEW B
LA English
DT Article
ID CARBON NANOTUBES; PYROLYTIC-GRAPHITE; SINGLE-CRYSTAL; CONDUCTIVITY;
DIAMOND
AB We present a theory for the lattice thermal conductivity kappa(L) of single-walled boron nitride nanotubes (BNNTs) and multilayer hexagonal boron nitride (MLBN), which is based on an exact numerical solution of the phonon Boltzmann equation. Coupling between layers in MLBN and nanotube curvature in BNNTs each break a phonon scattering selection rule found in single-layer hexagonal boron nitride (SLBN), which reduces kappa(L) in these systems. We show that out-of-plane flexural phonons in MLBN and out-of-tube phonons in BNNTs provide large contributions to kappa(L), qualitatively similar to multilayer graphene (MLG) and single-walled carbon nanotubes (SWCNTs). However, we find that the kappa(L)'s in BNNTs and MLBN are considerably smaller compared to similar SWCNTs and MLG structures because of stronger anharmonic phonon scattering in the former. A large and strongly temperature-dependent isotope effect is found reflecting the interplay between anharmonic and isotope scattering phonons. Finally, we also demonstrate convergence of BNNTs into SLBN for large-diameter nanotubes and MLBN to bulk hexagonal boron nitride within a few layers.
C1 [Lindsay, L.] USN, Res Lab, Washington, DC 20375 USA.
[Broido, D. A.] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA.
RP Lindsay, L (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM lucas.lindsay.ctr@nrl.navy.mil
RI Lindsay, Lucas/C-9221-2012
OI Lindsay, Lucas/0000-0001-9645-7993
FU NRC/NRL; DARPA; National Science Foundation [1066634]
FX LL acknowledges support from the NRC/NRL Research Associateship Program
and from DARPA. DAB acknowledges support from the National Science
Foundation under Grant No. 1066634.
NR 43
TC 16
Z9 17
U1 5
U2 47
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 JAN 23
PY 2012
VL 85
IS 3
AR 035436
DI 10.1103/PhysRevB.85.035436
PG 8
WC Physics, Condensed Matter
SC Physics
GA 880RP
UT WOS:000299424900009
ER
PT J
AU Johnson, BJ
Melde, BJ
Peterson, GW
Schindler, BJ
Jones, P
AF Johnson, Brandy J.
Melde, Brian J.
Peterson, Gregory W.
Schindler, Bryan J.
Jones, Paulette
TI Functionalized organosilicate materials for irritant gas removal
SO CHEMICAL ENGINEERING SCIENCE
LA English
DT Article
DE Sorption; Porous media; Packed bed; Separations; Organosilicate;
Mesoporous
ID PERIODIC MESOPOROUS ORGANOSILICAS; SILICATE MATERIALS; ORGANIC GROUPS;
ADSORPTION; FRAMEWORK; FILMS; OXIDE; SIEVES; FUTURE; PMOS
AB Organosilicate materials functionalized through post-synthesis grafting have been evaluated for their potential to remove irritant gases. Organosilicate scaffolds were synthesized through a technique combining surfactant-templating and phase separation to produce a macro-textured scaffold with a combination of micro- and mesopores. This structure facilitates diffusion through the sorbent material providing enhanced access to the available surface area. Post-synthesis grafting was used to incorporate amine and isocyanate groups on the surfaces of the pore walls in an attempt to modify the binding and reactive character of the materials. These modified materials were compared to the unmodified organosilicate scaffold. The removal of irritant gases including ammonia, sulfur dioxide, cyanogen chloride, and octane was evaluated for the materials variants. Results have been compared to the removal of the gases by carbons as well as other materials reported in recent literature. Published by Elsevier Ltd.
C1 [Johnson, Brandy J.; Melde, Brian J.] USN, Res Lab, Washington, DC 20375 USA.
[Peterson, Gregory W.] Edgewood Chem Biol Ctr, Aberdeen Proving Ground, MD 21010 USA.
[Schindler, Bryan J.; Jones, Paulette] Sci Applicat Int Corp, Gunpowder, MD 21010 USA.
RP Johnson, BJ (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM brandy.white@nrl.navy.mil
RI Johnson, Brandy/B-3462-2008; Schindler, Bryan/I-1529-2013
OI Johnson, Brandy/0000-0002-3637-0631; Schindler,
Bryan/0000-0003-3127-2722
FU U.S. Defense Threat Reduction Agency's Chemical & Biological
Technologies Directorate (DTRA-CB) Physical Science & Technology
Division [BA08PRO015]
FX The authors would like to thank Dr. A.P. Malanoski for his invaluable
insights. This research was sponsored by the U.S. Defense Threat
Reduction Agency's Chemical & Biological Technologies Directorate
(DTRA-CB) Physical Science & Technology Division under the topic
Protection and Hazard Mitigation (BA08PRO015). We applied the SDC
approach ("sequence-determines-credit") for determining the sequence of
authors (Tscharntke et al, 2007). The views expressed here are those of
the authors and do not represent those of the U.S. Navy, the U.S.
Department of Defense, or the U.S. Government.
NR 42
TC 17
Z9 17
U1 4
U2 27
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0009-2509
J9 CHEM ENG SCI
JI Chem. Eng. Sci.
PD JAN 22
PY 2012
VL 68
IS 1
BP 376
EP 382
DI 10.1016/j.ces.2011.09.048
PG 7
WC Engineering, Chemical
SC Engineering
GA 846DC
UT WOS:000296876400032
ER
PT J
AU Cheng, X
Zhang, J
Olmedo, O
Vourlidas, A
Ding, MD
Liu, Y
AF Cheng, X.
Zhang, J.
Olmedo, O.
Vourlidas, A.
Ding, M. D.
Liu, Y.
TI INVESTIGATION OF THE FORMATION AND SEPARATION OF AN EXTREME-ULTRAVIOLET
WAVE FROM THE EXPANSION OF A CORONAL MASS EJECTION
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE Sun: corona; Sun: coronal mass ejections (CMEs); waves
ID EIT WAVES; MORETON WAVES; QUADRATURE OBSERVATIONS; SOHO/EIT
OBSERVATIONS; SOLAR CORONA; STEREO; EUV; SIMULATIONS; SDO/AIA; SECCHI
AB We address the nature of EUV waves through direct observations of the formation of a diffuse wave driven by the expansion of a coronal mass ejection (CME) and its subsequent separation from the CME front. The wave and the CME on 2011 June 7 were well observed by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. Following the solar eruption onset, marked by the beginning of the rapid increasing of the CME velocity and the X-ray flux of accompanying flare, the CME exhibits a strong lateral expansion. During this impulsive expansion phase, the expansion speed of the CME bubble increases from 100 km s(-1) to 450 km s(-1) in only six minutes. An important finding is that a diffuse wave front starts to separate from the front of the expanding bubble shortly after the lateral expansion slows down. Also a type II burst is formed near the time of the separation. After the separation, two distinct fronts propagate with different kinematic properties. The diffuse front travels across the entire solar disk, while the sharp front rises up, forming the CME ejecta with the diffuse front ahead of it. These observations suggest that the previously termed EUV wave is a composite phenomenon and driven by the CME expansion. While the CME expansion is accelerating, the wave front is cospatial with the CME front, thus the two fronts are indiscernible. Following the end of the acceleration phase, the wave moves away from the CME front with a gradually increasing distance between them.
C1 [Cheng, X.; Ding, M. D.] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China.
[Cheng, X.; Zhang, J.] George Mason Univ, Sch Phys Astron & Computat Sci, Fairfax, VA 22030 USA.
[Cheng, X.; Ding, M. D.] Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China.
[Olmedo, O.] USN, Res Lab, NRC, Washington, DC 20375 USA.
[Vourlidas, A.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Liu, Y.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
RP Cheng, X (reprint author), Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China.
EM jzhang7@gmu.edu; dmd@nju.edu.cn
RI Cheng, Xin/G-6762-2011; Ding, Mingde/C-7787-2009; Vourlidas,
Angelos/C-8231-2009;
OI Cheng, Xin/0000-0003-2837-7136; Vourlidas, Angelos/0000-0002-8164-5948;
Liu, Ying/0000-0002-3483-5909
FU NSFC [10878002, 10933003, 11025314]; NKBRSF [2011CB811402]; China
Scholarship Council (CSC) [2010619071]; NSF [ATM-0748003]; NASA
[NNG05GG19G, S-136361-Y]
FX We thank P. F. Chen for many valuable comments that helped to improve
the manuscript significantly. SDO is a mission of NASA's Living With a
Star Program. X.C. and M.D.D. are supported by NSFC under grants
10878002, 10933003, and 11025314 and NKBRSF under grant 2011CB811402.
X.C. is also supported by the scholarship granted by the China
Scholarship Council (CSC) under file No. 2010619071. J.Z. is supported
by NSF grant ATM-0748003 and NASA grant NNG05GG19G. A.V. is supported by
NASA contract S-136361-Y.
NR 41
TC 49
Z9 52
U1 0
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD JAN 20
PY 2012
VL 745
IS 1
AR L5
DI 10.1088/2041-8205/745/1/L5
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 891PC
UT WOS:000300228100005
ER
PT J
AU Puleo, JA
McKenna, TE
Holland, KT
Calantoni, J
AF Puleo, Jack A.
McKenna, Thomas E.
Holland, K. Todd
Calantoni, Joseph
TI Quantifying riverine surface currents from time sequences of thermal
infrared imagery
SO WATER RESOURCES RESEARCH
LA English
DT Article
ID OF-CONCEPT EXPERIMENT; VELOCITY-FIELDS; VIDEO IMAGERY; SWASH ZONE;
TEMPERATURE; DISCHARGE; RADAR; FLOWS; SCALE; SPEED
AB River surface currents are quantified from thermal and visible band imagery using two methods. One method utilizes time stacks of pixel intensity to estimate the streamwise velocity at multiple locations. The other method uses particle image velocimetry to solve for optimal two-dimensional pixel displacements between successive frames. Field validation was carried out on the Wolf River, a small coastal plain river near Landon, Mississippi, United States, on 26-27 May 2010 by collecting imagery in association with in situ velocities sampled using electromagnetic current meters deployed 0.1 m below the river surface. Comparisons are made between mean in situ velocities and image-derived velocities from 23 thermal and 6 visible-band image sequences (5 min length) during daylight and darkness conditions. The thermal signal was a small apparent temperature contrast induced by turbulent mixing of a thin layer of cooler water near the river surface with underlying warmer water. The visible-band signal was foam on the water surface. For thermal imagery, streamwise velocities derived from the pixel time stack and particle image velocimetry technique were generally highly correlated to mean streamwise current meter velocities during darkness (r(2) typically greater than 0.9) and early morning daylight (r(2) typically greater than 0.83). Streamwise velocities from the pixel time stack technique had high correlation for visible-band imagery during early morning daylight hours with respect to mean current meter velocities (r(2) > 0.86). Streamwise velocities for the particle image velocimetry technique for visible-band imagery had weaker correlations with only three out of six correlations performed having an r(2) exceeding 0.6.
C1 [Puleo, Jack A.] Univ Delaware, Ctr Appl Coastal Res, Newark, DE 19716 USA.
[Holland, K. Todd; Calantoni, Joseph] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[McKenna, Thomas E.] Univ Delaware, Newark, DE 19716 USA.
RP Puleo, JA (reprint author), Univ Delaware, Ctr Appl Coastal Res, Newark, DE 19716 USA.
EM joec@nrlssc.navy.mil; mckennat@udel.edu; tholland@nrlssc.navy.mil;
jpuleo@udel.edu
RI Holland, K. Todd/A-7673-2011
OI Holland, K. Todd/0000-0002-4601-6097
FU Office of Naval Research [PE 61153N]; University of Delaware
FX This work was funded by the Office of Naval Research and the University
of Delaware. Support was provided to the Naval Research Laboratory
through base funding from the Office of Naval Research (PE 61153N). We
thank Autumn Kidwell, Thijs Lanckriet, Lauren Munoz, Tim Sliwinski,
Melissa Stewart, Christine Sutkowski, and Sam Vaughan for field
assistance and Christine Sutkowski for additional assistance with
imagery analysis. Tim Kooney assisted with static surveys. Joe Feil at
Wolf River Canoe and Kayak provided access to the field site. We thank
the anonymous reviewers for a detailed review of our manuscript, one of
whom prompted us to modify one of the techniques we originally utilized
in this work.
NR 35
TC 15
Z9 17
U1 1
U2 14
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0043-1397
J9 WATER RESOUR RES
JI Water Resour. Res.
PD JAN 20
PY 2012
VL 48
AR W01527
DI 10.1029/2011WR010770
PG 20
WC Environmental Sciences; Limnology; Water Resources
SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water
Resources
GA 880DU
UT WOS:000299385700004
ER
PT J
AU Schrijver, CJ
Brown, JC
Battams, K
Saint-Hilaire, P
Liu, W
Hudson, H
Pesnell, WD
AF Schrijver, C. J.
Brown, J. C.
Battams, K.
Saint-Hilaire, P.
Liu, W.
Hudson, H.
Pesnell, W. D.
TI Destruction of Sun-Grazing Comet C/2011 N3 (SOHO) Within the Low Solar
Corona
SO SCIENCE
LA English
DT Article
AB Observations of comets in Sun-grazing orbits that survive solar insolation long enough to penetrate into the Sun's inner corona provide information on the solar atmosphere and magnetic field as well as on the makeup of the comet. On 6 July 2011, the Solar Dynamics Observatory (SDO) observed the demise of comet C/2011 N3 (SOHO) within the low solar corona in five wavelength bands in the extreme ultraviolet (EUV). The comet penetrated to within 0.146 solar radius (similar to 100,000 kilometers) of the solar surface before its EUV signal disappeared. Before that, material released into the coma-at first seen in absorption-formed a variable EUV-bright tail. During the final 10 minutes of observation by SDO's Atmospheric Imaging Assembly, similar to 6 x 10(8) to 6 x 10(10) grams of total mass was lost (corresponding to an effective nucleus diameter of similar to 10 to 50 meters), as estimated from the tail's deceleration due to interaction with the surrounding coronal material; the EUV absorption by the comet and the brightness of the tail suggest that the mass was at the high end of this range. These observations provide evidence that the nucleus had broken up into a family of fragments, resulting in accelerated sublimation in the Sun's intense radiation field.
C1 [Schrijver, C. J.; Liu, W.] Lockheed Martin Adv Technol Ctr, Palo Alto, CA 94304 USA.
[Brown, J. C.; Hudson, H.] Univ Glasgow, Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland.
[Battams, K.] USN, Res Lab, Washington, DC 20375 USA.
[Saint-Hilaire, P.; Hudson, H.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
[Liu, W.] Stanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA.
[Pesnell, W. D.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Schrijver, CJ (reprint author), Lockheed Martin Adv Technol Ctr, 3251 Hanover St, Palo Alto, CA 94304 USA.
EM schrijver@lmsal.com
RI Pesnell, William/D-1062-2012
OI Pesnell, William/0000-0002-8306-2500
FU NASA SDO/AIA [NNG04EA00C]
FX Supported by NASA SDO/AIA contract NNG04EA00C to Lockheed Martin's Solar
and Astrophysics Laboratory. The SDO/AIA data can be accessed at
http://aia.lmsal.com; the STEREO/SECCHI data can be accessed at
http://stereo-ssc.nascom.nasa.gov/data/ins_data/secchi. We thank the
four reviewers and the editor for their help in improving the
manuscript.
NR 10
TC 15
Z9 15
U1 0
U2 3
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD JAN 20
PY 2012
VL 335
IS 6066
BP 324
EP 328
DI 10.1126/science.1211688
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 878RE
UT WOS:000299273400044
PM 22267810
ER
PT J
AU Cranch, GA
Foster, S
AF Cranch, Geoffrey A.
Foster, Scott
TI Comment on "Probing the Ultimate Limit of Fiber-Optic Strain Sensing"
SO SCIENCE
LA English
DT Editorial Material
ID FREQUENCY NOISE; THERMAL NOISE; LASER
C1 [Cranch, Geoffrey A.] USN, Res Lab, Washington, DC 20375 USA.
[Foster, Scott] Def Sci & Technol Org, Edinburgh, SA 5111, Australia.
RP Cranch, GA (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM geoff.cranch@nrl.navy.mil; scott.foster@dsto.defence.gov.au
NR 15
TC 7
Z9 7
U1 5
U2 26
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD JAN 20
PY 2012
VL 335
IS 6066
DI 10.1126/science.1205452
PG 2
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 878RE
UT WOS:000299273400026
PM 22267794
ER
PT J
AU Lee, WK
Yang, MC
Laracuente, AR
King, WP
Whitman, LJ
Sheehan, PE
AF Lee, Woo-Kyung
Yang, Minchul
Laracuente, Arnaldo R.
King, William P.
Whitman, Lloyd J.
Sheehan, Paul E.
TI Direct-write polymer nanolithography in ultra-high vacuum
SO BEILSTEIN JOURNAL OF NANOTECHNOLOGY
LA English
DT Article
DE additive lithography; polymer; scanning probe lithography; ultra high
vacuum
ID DIP-PEN NANOLITHOGRAPHY; LITHOGRAPHY; MICROSCOPE; DEPOSITION; SCALE; TIP
AB Polymer nanostructures were directly written onto substrates in ultra-high vacuum. The polymer ink was coated onto atomic force microscope (AFM) probes that could be heated to control the ink viscosity. Then, the ink-coated probes were placed into an ultra-high vacuum (UHV) AFM and used to write polymer nanostructures on surfaces, including surfaces cleaned in UHV. Controlling the writing speed of the tip enabled the control over the number of monolayers of the polymer ink deposited on the surface from a single to tens of monolayers, with higher writing speeds generating thinner polymer nanostructures. Deposition onto silicon oxide-terminated substrates led to polymer chains standing upright on the surface, whereas deposition onto vacuum reconstructed silicon yielded polymer chains aligned along the surface.
C1 [Lee, Woo-Kyung; Laracuente, Arnaldo R.; Sheehan, Paul E.] USN, Div Chem, Res Lab, Washington, DC 20375 USA.
[Yang, Minchul] US Patent & Trademark Off, Alexandria, VA 22314 USA.
[King, William P.] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA.
[Whitman, Lloyd J.] NIST, Ctr Nanoscale Sci & Technol, Gaithersburg, MD 20899 USA.
RP Sheehan, PE (reprint author), USN, Div Chem, Res Lab, Washington, DC 20375 USA.
EM paul.sheehan@nrl.navy.mil
RI Sheehan, Paul/B-4793-2010;
OI Sheehan, Paul/0000-0003-2668-4124; Whitman, Lloyd/0000-0002-3117-1174
NR 20
TC 5
Z9 5
U1 1
U2 10
PU BEILSTEIN-INSTITUT
PI FRANKFURT AM MAIN
PA TRAKEHNER STRASSE 7-9, FRANKFURT AM MAIN, 60487, GERMANY
SN 2190-4286
J9 BEILSTEIN J NANOTECH
JI Beilstein J. Nanotechnol.
PD JAN 19
PY 2012
VL 3
BP 52
EP 56
DI 10.3762/bjnano.3.6
PG 5
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 889EJ
UT WOS:000300056000001
PM 22428096
ER
PT J
AU Bassim, ND
Dressick, WJ
Fears, KP
Stroud, RM
Clark, TD
Petrovykh, DY
AF Bassim, Nabil D.
Dressick, Walter J.
Fears, Kenan P.
Stroud, Rhonda M.
Clark, Thomas D.
Petrovykh, Dmitri Y.
TI Layer-by-Layer Assembly of Heterogeneous Modular Nanocomposites
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID POLYELECTROLYTE MULTILAYERS; ELECTROLYTE-SOLUTIONS; GOLD NANOPARTICLES;
PLASMON RESONANCES; FILMS; GROWTH; ANION; ASSOCIATION; DEPOSITION;
MGSO4(AQ)
AB Layer-by-layer (LbL) assembly of nanoparticles and polyelectrolyte multilayers into alternating nonrepetitive strata (modules) demonstrates an important advance in heterogeneous nanocomposites from random or repetitive distributions of nanoparticles to a versatile modular design. The morphology and composition for each module are determined by the LbL assembly conditions, as confirmed by cross-section transmission electron microscopy (TEM) and by X-ray photoelectron spectroscopy (XPS). Thickness and spacing of the modules are maintained in the 5-50 nm range relevant for nanoscale proximal interactions.
C1 [Bassim, Nabil D.; Dressick, Walter J.; Fears, Kenan P.; Stroud, Rhonda M.; Clark, Thomas D.; Petrovykh, Dmitri Y.] USN, Res Lab, Washington, DC 20375 USA.
[Petrovykh, Dmitri Y.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
RP Petrovykh, DY (reprint author), Int Iberian Nanotechnol Lab, Ave Mestre Jose Veiga, P-4715330 Braga, Portugal.
EM dmitri.petrovykh@inl.int
RI Petrovykh, Dmitri/A-3432-2008; Stroud, Rhonda/C-5503-2008
OI Petrovykh, Dmitri/0000-0001-9089-4076; Stroud,
Rhonda/0000-0001-5242-8015
FU Office of Naval Research through the NRL Institute for Nanoscience; Air
Force Office of Scientific Research; National Research Council
FX This work was supported by the Office of Naval Research through the NRL
Institute for Nanoscience and by the Air Force Office of Scientific
Research. K.P.F. acknowledges the National Research Council for a
postdoctoral fellowship. D.Y.P. and K.P.F. thank Shannon Ball for
assistance with troubleshooting the LbL assembly protocols.
NR 57
TC 16
Z9 16
U1 0
U2 25
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD JAN 19
PY 2012
VL 116
IS 2
BP 1694
EP 1701
DI 10.1021/jp207912b
PG 8
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 882SS
UT WOS:000299584800008
ER
PT J
AU Erickson, JS
Hashemi, N
Sullivan, JM
Weidemann, AD
Ligler, FS
AF Erickson, Jeffrey S.
Hashemi, Nastaran
Sullivan, James M.
Weidemann, Alan D.
Ligler, Frances S.
TI In Situ Phytoplankton Analysis: There's Plenty of Room at the Bottom
SO ANALYTICAL CHEMISTRY
LA English
DT Review
ID SUBMERSIBLE FLOW CYTOMETER; PARTICLE IMAGE VELOCIMETRY; OPTICAL PLANKTON
ANALYZER; HARMFUL ALGAL BLOOMS; SAMPLE PROCESSOR ESP; MICROFLOW
CYTOMETER; BACKSCATTERING PROPERTIES; ABSORPTION SIGNATURES;
MARINE-PHYTOPLANKTON; OCEAN
C1 [Erickson, Jeffrey S.; Hashemi, Nastaran; Ligler, Frances S.] USN, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC 20375 USA.
[Sullivan, James M.] WET Labs Inc, Dept Res, Narragansett, RI 02882 USA.
[Weidemann, Alan D.] USN, Res Lab, Hydroopt Sensors & Syst Sect, Stennis Space Ctr, MS 39529 USA.
RP Ligler, FS (reprint author), USN, Res Lab, Ctr Bio Mol Sci & Engn, Code 6900, Washington, DC 20375 USA.
EM Frances.ligler@nrl.navy.mil
RI Hashemi, Nastaran/A-7645-2012; Erickson, Jeffrey/F-6273-2011
OI Hashemi, Nastaran/0000-0001-8921-7588;
FU ONR/NRL Work Unit [6.2 BE 62.6289]
FX This analysis was supported by ONR/NRL Work Unit 6.2 BE 62.6289. N.H.
was a postdoctoral fellow of the American Society of Engineering
Education. The views are those of the authors and do not reflect opinion
or policy of the U.S. Navy or Department of Defense.
NR 85
TC 14
Z9 15
U1 1
U2 40
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
EI 1520-6882
J9 ANAL CHEM
JI Anal. Chem.
PD JAN 17
PY 2012
VL 84
IS 2
BP 839
EP 850
DI 10.1021/ac201623k
PG 12
WC Chemistry, Analytical
SC Chemistry
GA 876UY
UT WOS:000299134400018
PM 21755976
ER
PT J
AU Kim, H
Osofsky, M
Miller, MM
Qadri, SB
Auyeung, RCY
Pique, A
AF Kim, H.
Osofsky, M.
Miller, M. M.
Qadri, S. B.
Auyeung, R. C. Y.
Pique, A.
TI Room temperature ferromagnetism in transparent Fe-doped In2O3 films
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID INDIUM-TIN-OXIDE; LIGHT-EMITTING DEVICES; THIN-FILMS;
(IN1-XFEX)(2)O3-SIGMA; SEMICONDUCTOR
AB Fe-doped In2O3 thin films were deposited on MgO substrates by pulsed laser deposition (PLD). The linear decrease in lattice constant with increasing Fe concentration of up to 18% suggests the incorporation of Fe atoms into In2O3 lattice matrix. The PLD grown films exhibited ferromagnetism at room temperature with a strong magnetic anisotropy. The observed anomalous Hall effect (AHE) indicates that spin polarized charge carriers play an important role in the origin of ferromagnetism in these oxides. Our observations, including AHE, magnetic anisotropy, and structural analysis provide strong evidence of intrinsic ferromagnetism at room temperature in these materials. [doi:10.1063/1.3678038]
C1 [Kim, H.; Osofsky, M.; Miller, M. M.; Qadri, S. B.; Auyeung, R. C. Y.; Pique, A.] USN, Res Lab, Washington, DC 20375 USA.
RP Kim, H (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM heungsoo.kim@nrl.navy.mil
FU Office of Naval Research
FX The authors would like to thank Dr. Peter Lubitz for helpful discussions
and valuable suggestions. This work was supported by Office of Naval
Research.
NR 19
TC 20
Z9 20
U1 3
U2 22
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 16
PY 2012
VL 100
IS 3
AR 032404
DI 10.1063/1.3678038
PG 3
WC Physics, Applied
SC Physics
GA 880EE
UT WOS:000299386800034
ER
PT J
AU Martin, TP
Orris, GJ
AF Martin, Theodore P.
Orris, Gregory J.
TI Hybrid inertial method for broadband scattering reduction
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ACOUSTIC CLOAKING
AB We combine a transformational acoustic (TA) conformal map with a scattering cancellation (SC) layer to produce a hybrid design that reduces the scattering cross-section of an object in an aqueous environment. Our method is an inertial design that does not rely on negative-valued media. Using multiple scattering theory for cylindrical shells, our calculations demonstrate that the hybrid design outperforms both a discretized transformational acoustic superlattice and a scattering cancellation layer over a broad frequency bandwidth. The hybrid method can be utilized to optimize performance over targeted frequency bands. [doi:10.1063/1.3678633]
C1 [Martin, Theodore P.; Orris, Gregory J.] USN, Acoust Div, Res Lab, Washington, DC 20375 USA.
RP Martin, TP (reprint author), USN, Acoust Div, Res Lab, Washington, DC 20375 USA.
EM ted.martin@nrl.navy.mil
RI Martin, Theodore/H-1287-2016
FU U.S. Office of Naval Research
FX This work was supported by the U.S. Office of Naval Research.
NR 21
TC 8
Z9 8
U1 0
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 16
PY 2012
VL 100
IS 3
AR 033506
DI 10.1063/1.3678633
PG 3
WC Physics, Applied
SC Physics
GA 880EE
UT WOS:000299386800065
ER
PT J
AU Pan, Z
Jensen, K
O'Shea, P
AF Pan, Z.
Jensen, K.
O'Shea, P.
TI Modeling the quantum efficiency of controlled porosity dispenser
photocathodes
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID DIFFUSION; SURFACES; TUNGSTEN
AB A theoretical model of diffusion, evaporation, and rejuvenation of cesium on the surface of a controlled porosity dispenser photocathode is developed. The model applies a novel hexagonal meshgrid for increased numerical accuracy. For activation temperatures within the range of 400K-1000K, simulation found differences of less than 5% between the quantum efficiency (QE) maximum and minimum over ideal homogenous surfaces. Simulations suggest more variation for real cases to include real surface non uniformity. Changes in the QE map across the surface suggest that the emittance can change depending on temperature. Extensions to the model as well as connections to experiment are discussed. (C) 2012 American Institute of Physics. [doi:10.1063/1.3678035]
C1 [Pan, Z.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[Pan, Z.; Jensen, K.] USN, Res Lab, Washington, DC 20375 USA.
[O'Shea, P.] Univ Maryland, ECE Dept, College Pk, MD 20742 USA.
RP Pan, Z (reprint author), Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
EM zhigang.pan@nrl.navy.mil
RI Jensen, Kevin/I-1269-2015
OI Jensen, Kevin/0000-0001-8644-1680
FU Office of Naval Research; Joint Technology Office
FX We thank the Office of Naval Research and the Joint Technology Office
for their support, and E. Montgomery and D. Feldman for useful
discussions.
NR 13
TC 3
Z9 3
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 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD JAN 16
PY 2012
VL 100
IS 3
AR 034102
DI 10.1063/1.3678035
PG 3
WC Physics, Applied
SC Physics
GA 880EE
UT WOS:000299386800069
ER
PT J
AU Shenenberger, DW
AF Shenenberger, Donald W.
TI Cutaneous Malignant Melanoma: A Primary Care Perspective
SO AMERICAN FAMILY PHYSICIAN
LA English
DT Article
ID DIAGNOSIS; BIOPSY; 21ST-CENTURY; MANAGEMENT; WHITES; RISK
AB Cutaneous malignant melanoma accounts for 3 to 5 percent of all skin cancers and is responsible for approximately 75 percent of all deaths from skin cancer. Persons with an increased number of moles, dysplastic (also called atypical) nevi, or a family history of the disease are at increased risk compared with the general population. An important tool to assist in the evaluation of potential melanomas for patients and health care professionals is the ABCDE mnemonic, which takes into account asymmetry, border irregularities, color variation, diameter, and evolution. Any suspicious pigmented lesion should be biopsied. Appropriate methods of biopsy can vary, and include deep shave, punch, and excisional biopsy. Regardless of the procedure selected, it is essential that the size of the specimen be adequate to determine the histologic depth of lesion penetration, which is known as the Breslow depth. The Breslow depth is the most important prognostic parameter in evaluating the primary tumor. Because early detection and treatment can lead to identification of thinner lesions, which may increase survival, it is critical that physicians be comfortable with evaluating suspicious pigmented lesions and providing treatment or referral as necessary. (Am Fam Physician. 2012;85(2):161-168. Copyright (C) 2012 American Academy of Family Physicians.)
C1 USN, Naval Med Ctr Portsmouth, Portsmouth, VA 23708 USA.
RP Shenenberger, DW (reprint author), USN, Naval Med Ctr Portsmouth, 620 John Paul Jones Circle, Portsmouth, VA 23708 USA.
EM donald.shenenberger@med.navy.mil
NR 35
TC 10
Z9 10
U1 0
U2 4
PU AMER ACAD FAMILY PHYSICIANS
PI KANSAS CITY
PA 8880 WARD PARKWAY, KANSAS CITY, MO 64114-2797 USA
SN 0002-838X
J9 AM FAM PHYSICIAN
JI Am. Fam. Physician
PD JAN 15
PY 2012
VL 85
IS 2
BP 161
EP 168
PG 8
WC Primary Health Care; Medicine, General & Internal
SC General & Internal Medicine
GA 980AX
UT WOS:000306867100008
PM 22335216
ER
PT J
AU Fitzgerald, LA
Petersen, ER
Gross, BJ
Soto, CM
Ringeisen, BR
El-Naggar, MY
Biffinger, JC
AF Fitzgerald, Lisa A.
Petersen, Emily R.
Gross, Benjamin J.
Soto, Carissa M.
Ringeisen, Bradley R.
El-Naggar, Mohamed Y.
Biffinger, Justin C.
TI Aggrandizing power output from Shewanella oneidensis MR-1 microbial fuel
cells using calcium chloride
SO BIOSENSORS & BIOELECTRONICS
LA English
DT Article
DE Shewanella oneidensis MR-1; Microbial fuel cell; Calcium chloride; EIS
ID IMPEDANCE SPECTROSCOPY EIS; IONIC-STRENGTH; REDUCTION; ELECTRICITY;
GENERATION; CATHODES; BACTERIA; HYDROGEN; SYSTEMS; DSP10
AB There are several interconnected metabolic pathways in bacteria essential for the conversion of carbon electron sources directly into electrical currents using microbial fuel cells (MFCs). This study establishes a direct exogenous method to increase power output from a Shewanella oneidensis MR-1 containing MFC by adding calcium chloride to the culture medium. The current output from each CaCl2 concentration tested revealed that the addition of CaCl2 to 1400 mu M increased the current density by >80% (0.95-1.76 mu A/cm(2)) using sodium lactate as the sole carbon source. Furthermore, polarization curves showed that the maximum power output could be increased from 157 to 330 mu W with the addition of 2080 mu M CaCl2. Since the conductivity of the culture medium did not change after the addition of CaCl2 (confirmed by EIS and bulk conductivity measurements), this increase in power was primarily biological and not based on ionic effects. Thus, controlling the concentration of CaCl2 is a pathway to increase the efficiency and performance of S. oneidensis MR-1 MFCs. Published by Elsevier B.V.
C1 [Gross, Benjamin J.; El-Naggar, Mohamed Y.] Dept Phys & Astron, Los Angeles, CA 90089 USA.
[Fitzgerald, Lisa A.; Ringeisen, Bradley R.; Biffinger, Justin C.] USN, Div Chem, Res Lab, Washington, DC 20375 USA.
[Petersen, Emily R.] Nova Res Inc, Alexandria, VA 22308 USA.
[Soto, Carissa M.] USN, Ctr Bio Mol Sci & Engn, Res Lab, Washington, DC 20375 USA.
RP El-Naggar, MY (reprint author), Dept Phys & Astron, 920 Bloom Walk, Los Angeles, CA 90089 USA.
EM mnaggar@usc.edu; justin.biffinger@nrl.navy.mil
FU Office of Naval Research through NRL PE [61153N]; Air Force Office of
Scientific Research through MIPR [F1ATA00060G002]; Air Force Office of
Scientific Research YIP [FA9550-10-1-0144]
FX We would like to thank Yuri Gorby at the University of Southern
California for his productive discussions on culturing conditions with
the addition of calcium chloride. Funding was provided by the Office of
Naval Research through NRL PE#61153N and the Air Force Office of
Scientific Research through MIPR#F1ATA00060G002. M.E.-N. acknowledges
support from the Air Force Office of Scientific Research YIP grant
FA9550-10-1-0144.
NR 37
TC 16
Z9 20
U1 6
U2 46
PU ELSEVIER ADVANCED TECHNOLOGY
PI OXFORD
PA OXFORD FULFILLMENT CENTRE THE BOULEVARD, LANGFORD LANE, KIDLINGTON,
OXFORD OX5 1GB, OXON, ENGLAND
SN 0956-5663
J9 BIOSENS BIOELECTRON
JI Biosens. Bioelectron.
PD JAN 15
PY 2012
VL 31
IS 1
BP 492
EP 498
DI 10.1016/j.bios.2011.11.024
PG 7
WC Biophysics; Biotechnology & Applied Microbiology; Chemistry, Analytical;
Electrochemistry; Nanoscience & Nanotechnology
SC Biophysics; Biotechnology & Applied Microbiology; Chemistry;
Electrochemistry; Science & Technology - Other Topics
GA 895AK
UT WOS:000300468400077
PM 22154401
ER
PT J
AU Harsha, SS
Melinger, JS
Qadri, SB
Grischkowsky, D
AF Harsha, S. Sree
Melinger, Joseph. S.
Qadri, S. B.
Grischkowsky, D.
TI Substrate independence of THz vibrational modes of polycrystalline thin
films of molecular solids in waveguide THz-TDS
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID TIME-DOMAIN SPECTROSCOPY; PREFERRED ORIENTATION; BIOLOGICAL MOLECULES;
TERAHERTZ SPECTRA; SINGLE-CRYSTALS
AB The influence of the metal substrate on the measurement of high resolution THz vibrational modes of molecular solids with the waveguide THz-TDS technique is investigated. The sample film of salicylic acid is studied using waveguide THz-TDS on three different metal substrates and two-surface passivated substrates. The independence of the observed THz vibrational modes to the metal substrate is demonstrated. Independently, surface passivation is presented as a viable experimental addition to the waveguide THz-TDS technique to aid the characterization of samples with known reactivity to metal surfaces. (C) 2012 American Institute of Physics. [doi:10.1063/1.3678000]
C1 [Harsha, S. Sree; Grischkowsky, D.] Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA.
[Melinger, Joseph. S.] USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
[Qadri, S. B.] USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
RP Grischkowsky, D (reprint author), Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA.
EM daniel.grischkowsky@okstate.edu
FU National Science Foundation; Defense Threat Reduction Agency [11-2210M];
Office of Naval Research
FX The authors thank Alisha J. Shutler of Oklahoma State University for
assistance with waveguide measurements. This work was partially
supported by the National Science Foundation, the Defense Threat
Reduction Agency (11-2210M), and the Office of Naval Research.
NR 23
TC 6
Z9 7
U1 2
U2 10
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD JAN 15
PY 2012
VL 111
IS 2
AR 023105
DI 10.1063/1.3678000
PG 7
WC Physics, Applied
SC Physics
GA 885PX
UT WOS:000299792400005
ER
PT J
AU Kucherov, Y
Hubler, G
Michopoulos, J
Johnson, B
AF Kucherov, Yan
Hubler, Graham
Michopoulos, John
Johnson, Brant
TI Acoustic waves excited by phonon decay govern the fracture of brittle
materials
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID 3-DIMENSIONAL PHOTONIC CRYSTALS; DIAMOND STRUCTURE; GAP; FABRICATION;
EMISSION; CAVITY; LIGHT
AB The behavior of brittle materials under ballistic impacts is often associated with failure waves that are producing small fracture particles with a surface area requiring large energy input. Numerous attempts to explain this effect since the 1960s did not yield convincing results. Here we propose that failure waves can be interpreted as the result of the decay of the shock-excited phonon continuum into low frequency peaks in the phonon density of states. This results in a situation where pressure amplitude of the localized acoustic waves exceeds a critical fracture quantity such as the tensile strength of the material. Experimental confirmation of this model is presented by using fractured particle size analyses and comparing their results with predicted acoustic wavelengths. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3675274]
C1 [Kucherov, Yan; Hubler, Graham; Michopoulos, John] USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
[Johnson, Brant] Nova Res Inc, Alexandria, VA 22308 USA.
RP Michopoulos, J (reprint author), USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA.
EM john.michopoulos@nrl.navy.mil
RI Michopoulos, John/D-6704-2016
OI Michopoulos, John/0000-0001-7004-6838
FU National Science Foundation of China [61025002, 10979035, 50835007];
National 973-project of China [2009CB623302]; International Science and
Technology Collaboration Project of China [2009DFA51820]
FX This work was supported by National Science Foundation of China
(61025002, 10979035, and 50835007), National 973-project of China
(2009CB623302), and International Science and Technology Collaboration
Project of China (2009DFA51820).
NR 24
TC 1
Z9 1
U1 0
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD JAN 15
PY 2012
VL 111
IS 2
AR 023514
DI 10.1063/1.3675274
PG 9
WC Physics, Applied
SC Physics
GA 885PX
UT WOS:000299792400026
ER
PT J
AU Paudel, MR
Wolfe, CS
Pathak, AK
Dubenko, I
Ali, N
Osofsky, MS
Prestigiacomo, JC
Stadler, S
AF Paudel, Moti R.
Wolfe, Christopher S.
Pathak, Arjun K.
Dubenko, Igor
Ali, Naushad
Osofsky, M. S.
Prestigiacomo, Joseph C.
Stadler, Shane
TI Induced magnetic anisotropy and spin polarization in pulsed
laser-deposited Co2MnSb thin films
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ELEMENT
AB Co2MnSb thin films were grown on glass and GaAs (001) substrates using pulsed laser deposition. The films were grown in magnetic fields (H-G = 500Oe and 0Oe) that were applied in the plane of the substrate during the deposition process. Angle-dependent magneto-optic Kerr effect measurements for films grown on glass revealed a uniaxial magnetic anisotropy in the direction of the applied growth field. Films grown on GaAs (001) exhibited more complicated magnetic anisotropy behavior, due to additional contributions from the substrate. Point contact Andreev reflection spectroscopy measurements indicated that the spin polarizations of the films were about P similar to 50%, with negligible difference between films grown in zero and non-zero applied fields. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3676264]
C1 [Prestigiacomo, Joseph C.; Stadler, Shane] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70802 USA.
[Paudel, Moti R.; Wolfe, Christopher S.; Pathak, Arjun K.; Dubenko, Igor; Ali, Naushad] So Illinois Univ, Dept Phys, Carbondale, IL 62901 USA.
[Osofsky, M. S.] USN, Res Lab, Washington, DC 20375 USA.
RP Stadler, S (reprint author), Louisiana State Univ, Dept Phys & Astron, 202 Nicholson Hall, Baton Rouge, LA 70802 USA.
EM stadler@phys.lsu.edu
RI Prestigiacomo, Joseph/A-2782-2014
FU National Science Foundation [NSF-DMR-0545728]
FX This work was supported by the National Science Foundation (Grant No.
NSF-DMR-0545728).
NR 20
TC 1
Z9 1
U1 0
U2 12
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 JAN 15
PY 2012
VL 111
IS 2
AR 023903
DI 10.1063/1.3676264
PG 4
WC Physics, Applied
SC Physics
GA 885PX
UT WOS:000299792400048
ER
PT J
AU Restorff, JB
Wun-Fogle, M
Hathaway, KB
Clark, AE
Lograsso, TA
Petculescu, G
AF Restorff, J. B.
Wun-Fogle, M.
Hathaway, K. B.
Clark, A. E.
Lograsso, T. A.
Petculescu, G.
TI Tetragonal magnetostriction and magnetoelastic coupling in Fe-Al, Fe-Ga,
Fe-Ge, Fe-Si, Fe-Ga-Al, and Fe-Ga-Ge alloys
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID IRON-GALLIUM ALLOYS; SINGLE-CRYSTALS; MAGNETIC-ANISOTROPY;
ELASTIC-CONSTANTS; TEMPERATURE; DEPENDENCE
AB This paper presents a comparative study on the tetragonal magnetostriction constant, lambda(gamma,2), [-(3/2) lambda(100)] and magnetoelastic coupling, b(1), of binary Fe(100-x)Z(x) (0 < x < 35, Z - Al, Ga, Ge, and Si) and ternary Fe-Ga-Al and Fe-Ga-Ge alloys. The quantities are corrected for magnetostrains due to sample geometry (the magnetostrictive form effect). Recently published elastic constant data along with magnetization measurements at both room temperature and 77K make these corrections possible. The form effect correction lowers the magnetostriction by similar to 10 ppm for high-modulus alloys and by as much as 30 ppm for low-modulus alloys. The elastic constants are also used to determine the values of the magnetoelastic coupling constant, b(1). With the new magnetostriction data on the Fe-Al-Ga alloy, it is possible to show how the double peak magnetostriction feature of the binary Fe-Ga alloy flows into the single peak binary Fe-Al alloy. The corrected magnetostriction and magnetoelastic coupling data for the various alloys are also compared using the electron-per-atom ratio, e/a, as the common variable. The Hume-Rothery rules link the e/a ratio to the regions of phase stability, which appear to be intimately related to the magnetostriction versus the solute concentration curve in these alloys. Using e/a as the abscissa tends to align the peaks in the magnetostriction and magnetoelastic coupling for the Fe-Ga, Fe-Ge, Fe-Al, Fe-Ga-Al, and Fe-Ga-Ge alloys, but not for the Fe-Si alloys for which the larger atomic size difference may play a greater role in phase stabilization. Corrections for the form effect are also presented for the rhombohedral magnetostriction, lambda(epsilon,2), and the magnetoelastic coupling, b(2), of Fe100-xGax (0 < x < 35) alloys. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3674318]
C1 [Restorff, J. B.; Wun-Fogle, M.] USN, Ctr Surface Warfare, Carderock Div, Bethesda, MD 20817 USA.
[Hathaway, K. B.] GJ Associates, Annapolis, MD 21401 USA.
[Clark, A. E.] Clark Associates, Adelphi, MD 20783 USA.
[Lograsso, T. A.] Ames Lab, Ames, IA 50011 USA.
[Petculescu, G.] Univ Louisiana, Lafayette, LA 70504 USA.
RP Wun-Fogle, M (reprint author), USN, Ctr Surface Warfare, Carderock Div, Bethesda, MD 20817 USA.
EM marilyn.wun-fogle@navy.mil
FU Office of Naval Research; Louisiana Board of Regents; U.S. Department of
Energy, Basic Energy Sciences, Materials Sciences and Engineering
Division for the binary based studies [DE-AC02-07CH11358]; ONR MURI
[N000140610530]
FX This work was supported by the Office of Naval Research (Code 321MS,
Maritime Sensing) and the Louisiana Board of Regents. T. A. L.
acknowledges the support of the U.S. Department of Energy, Basic Energy
Sciences, Materials Sciences and Engineering Division for the binary
based studies under Contract No. DE-AC02-07CH11358 and ONR MURI Contract
No. N000140610530 for the studies of the ternary alloys.
NR 40
TC 19
Z9 19
U1 2
U2 35
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 JAN 15
PY 2012
VL 111
IS 2
AR 023905
DI 10.1063/1.3674318
PG 12
WC Physics, Applied
SC Physics
GA 885PX
UT WOS:000299792400050
ER
PT J
AU Bashkansky, M
Fatemi, FK
Vurgaftman, I
AF Bashkansky, Mark
Fatemi, Fredrik K.
Vurgaftman, Igor
TI Quantum memory in warm rubidium vapor with buffer gas
SO OPTICS LETTERS
LA English
DT Article
ID ELECTROMAGNETICALLY INDUCED TRANSPARENCY; ATOMIC ENSEMBLES; LINEAR
OPTICS
AB The realization of quantum memory using warm atomic vapor cells is appealing because of their commercial availability and the perceived reduction in experimental complexity. In spite of the ambiguous results reported in the literature, we demonstrate that quantum memory can be implemented in a single cell with buffer gas using the geometry where the write and read beams are nearly copropagating. The emitted Stokes and anti-Stokes photons display cross-correlation values greater than 2, characteristic of quantum states, for delay times up to 4 mu s. (C) 2012 Optical Society of America
C1 [Bashkansky, Mark; Fatemi, Fredrik K.; Vurgaftman, Igor] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
RP Bashkansky, M (reprint author), USN, Res Lab, Div Opt Sci, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM bashkansky@nrl.navy.mil
FU Office of Naval Research
FX This work is supported by the Office of Naval Research.
NR 13
TC 16
Z9 16
U1 3
U2 15
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
EI 1539-4794
J9 OPT LETT
JI Opt. Lett.
PD JAN 15
PY 2012
VL 37
IS 2
BP 142
EP 144
PG 3
WC Optics
SC Optics
GA 885YY
UT WOS:000299818600008
PM 22854447
ER
PT J
AU Chun, HM
Roediger, MP
Hullsiek, KH
Thio, CL
Agan, BK
Bradley, WP
Peel, SA
Jagodzinski, LL
Weintrob, AC
Ganesan, A
Wortmann, G
Crum-Cianflone, NF
Maguire, JD
Landrum, ML
AF Chun, Helen M.
Roediger, Mollie P.
Hullsiek, Katherine Huppler
Thio, Chloe L.
Agan, Brian K.
Bradley, William P.
Peel, Sheila A.
Jagodzinski, Linda L.
Weintrob, Amy C.
Ganesan, Anuradha
Wortmann, Glenn
Crum-Cianflone, Nancy F.
Maguire, Jason D.
Landrum, Michael L.
CA Infect Dis Clinical Res Program
TI Hepatitis B Virus Coinfection Negatively Impacts HIV Outcomes in HIV
Seroconverters
SO JOURNAL OF INFECTIOUS DISEASES
LA English
DT Article
ID HUMAN-IMMUNODEFICIENCY-VIRUS; T-CELL RESPONSES; ACTIVE ANTIRETROVIRAL
THERAPY; C-VIRUS; HOMOSEXUAL-MEN; RAPID PROGRESSION; INFECTED PATIENTS;
NATURAL-HISTORY; AIDS; INDIVIDUALS
AB Background. Understanding the impact of hepatitis B virus (HBV) in human immunodeficiency virus (HIV) coinfection has been limited by heterogeneity of HIV disease. We evaluated HBV coinfection and HIV-related disease progression in a cohort of HIV seroconverters.
Methods. Participants with HIV diagnosis seroconversion window of < 3 years and serologically confirmed HBV infection (HB) status were classified at baseline into 4 HB groups. The risk of clinical AIDS/death in HIV seroconverters was calculated by HB status.
Results. Of 2352 HIV seroconverters, 474 (20%) had resolved HB, 82 (3%) had isolated total antibody to hepatitis B core antigen (HBcAb), and 64 (3%) had chronic HB. Unadjusted rates (95% confidence intervals [CIs]) of clinical AIDS/death for the HB-negative, resolved HB, isolated HBcAb, and chronic HB groups were 2.43 (2.15-2.71); 3.27 (2.71-3.84); 3.75 (2.25-5.25); and 5.41 (3.41-7.42), respectively. The multivariable risk of clinical AIDS/death was significantly higher in the chronic HB group compared to the HB-negative group (hazard ratio [HR], 1.80; 95% CI, 1.20-2.69); while the HRs were increased but nonsignificant for those with resolved HB (HR, 1.17; 95% CI, .94-1.46) and isolated HBcAb (HR, 1.14; 95% CI, .75-1.75).
Conclusions. HBV coinfection has a significant impact on HIV outcomes. The hazard for an AIDS or death event is almost double for those with chronic HB compared, with HIV-monoinfected persons.
C1 [Chun, Helen M.; Roediger, Mollie P.; Hullsiek, Katherine Huppler; Agan, Brian K.; Bradley, William P.; Peel, Sheila A.; Jagodzinski, Linda L.; Weintrob, Amy C.; Ganesan, Anuradha; Wortmann, Glenn; Crum-Cianflone, Nancy F.; Maguire, Jason D.; Landrum, Michael L.] Uniformed Serv Univ Hlth Sci, Infect Dis Clin Res Program, Bethesda, MD 20814 USA.
[Ganesan, Anuradha] Natl Naval Med Ctr, Div Infect Dis, Bethesda, MD USA.
[Thio, Chloe L.] Johns Hopkins Univ, Div Infect Dis, Baltimore, MD USA.
[Peel, Sheila A.; Jagodzinski, Linda L.] Walter Reed Army Inst Res, Div Retrovirol, Silver Spring, MD USA.
[Chun, Helen M.] USN, Dept Def HIV AIDS Prevent Program, Hlth Res Ctr, San Diego, CA 92106 USA.
[Crum-Cianflone, Nancy F.] USN, Infect Dis Clin, Med Ctr, San Diego, CA 92152 USA.
[Roediger, Mollie P.; Hullsiek, Katherine Huppler] Univ Minnesota, Div Biostat, Minneapolis, MN USA.
[Weintrob, Amy C.; Wortmann, Glenn] Walter Reed Army Med Ctr, Infect Dis Serv, Washington, DC 20307 USA.
[Maguire, Jason D.] USN, Div Infect Dis, Med Ctr, Portsmouth, VA USA.
[Landrum, Michael L.] San Antonio Mil Med Ctr, Infect Dis Serv, Ft Sam Houston, TX USA.
RP Chun, HM (reprint author), USN, Dept Def HIV AIDS Prevent Program, Hlth Res Ctr, 140 Sylvester Rd, San Diego, CA 92106 USA.
EM helen.chun@med.navy.mil
OI Eberly, Lynn/0000-0003-4763-330X; Agan, Brian/0000-0002-5114-1669
FU Department of Defense through Uniformed Services University of the
Health Sciences; National Institute of Allergy and Infectious Diseases,
National Institutes of Health (NIH) [Y1-AI-5072]
FX This work was supported by the Infectious Disease Clinical Research
Program (IDCRP; www.idcrp.org), a Department of Defense program executed
through Uniformed Services University of the Health Sciences. This
project has been funded in whole, or in part, with federal funds from
the National Institute of Allergy and Infectious Diseases, National
Institutes of Health (NIH), under Inter-Agency Agreement Y1-AI-5072. The
IDCRP reviewed the study design, collected the data and provided salary
support to investigators (M. L. L., K. H. H., M. P. R., N. F. C., A. C.
W., A. G., and B. K. A.). The analyses, conclusions, and decision to
submit the manuscript are the independent work and decision of the
authors.
NR 43
TC 43
Z9 43
U1 0
U2 2
PU OXFORD UNIV PRESS INC
PI CARY
PA JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA
SN 0022-1899
J9 J INFECT DIS
JI J. Infect. Dis.
PD JAN 15
PY 2012
VL 205
IS 2
BP 185
EP 193
DI 10.1093/infdis/jir720
PG 9
WC Immunology; Infectious Diseases; Microbiology
SC Immunology; Infectious Diseases; Microbiology
GA 866NN
UT WOS:000298387900006
PM 22147794
ER
PT J
AU Assink, JD
Waxler, R
Drob, D
AF Assink, J. D.
Waxler, R.
Drob, D.
TI On the sensitivity of infrasonic traveltimes in the equatorial region to
the atmospheric tides
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID DEPENDENT STOCHASTIC INVERSION; LATENT-HEAT RELEASE; NATURAL INFRASOUND;
RESEARCH SATELLITE; LOWER THERMOSPHERE; SPACED DATA; WIND; MIDDLE;
MODEL; TEMPERATURE
AB In comparison to the lower atmosphere where comprehensive global atmospheric specifications are commonplace, the ability to perform routine global measurements of the properties of the atmosphere above the stratopause continues to be an active area of scientific research. In this paper, we revisit the use of infrasound as a remote sensing technique for horizontal winds in the upper atmosphere. To use infrasound to monitor the winds in the upper atmosphere, a sufficiently strong and persistent infrasound source is required. In addition, because of the highly attenuating nature of the thermosphere, the signals used must have low enough frequency content to survive. In this paper, impulsive signals from the Tungurahua volcano in Ecuador are used. This volcano has gone through periods of intense activity during which impulsive signals of dominant periods between 3 and 5 s are emitted. Depending on the atmospheric conditions, stratospheric, mesospheric, and thermospheric arrivals are observed. It is found that the traveltimes of the thermospheric arrivals exhibit a coherent variability with periods equal to those of the tidal harmonics. As such, these observations suggest a means of passive atmospheric remote sensing that can be utilized in conjunction with other techniques to routinely measure the state of the upper atmosphere.
C1 [Assink, J. D.; Waxler, R.] Univ Mississippi, Natl Ctr Phys Acoust, University, MS 38677 USA.
[Drob, D.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Assink, JD (reprint author), Univ Mississippi, Natl Ctr Phys Acoust, 1 Coliseum Dr, University, MS 38677 USA.
EM jdassink@olemiss.edu
RI Drob, Douglas/G-4061-2014
OI Drob, Douglas/0000-0002-2045-7740
FU NOAA, U.S. Department of Commerce [NA08NWS4680044]; Office of Naval
Research
FX This document was prepared under award NA08NWS4680044 from NOAA, U.S.
Department of Commerce. The statements, findings, conclusions, and
recommendations are those of the authors and do not necessarily reflect
the views of NOAA or the U. S. Department of Commerce. The authors are
grateful to David Fee at the University of Hawaii (now at University of
Alaska Fairbanks) and Luc Samure at the Canadian National Data Center
for assistance with the infrasound data. The effort by D. P. Drob for
this research was supported by the Office of Naval Research. Figures
were generated with the help of Generic Mapping Tools, as described by
Wessel and Smith [1991].
NR 50
TC 26
Z9 26
U1 0
U2 11
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
EI 2169-8996
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD JAN 13
PY 2012
VL 117
AR D01110
DI 10.1029/2011JD016107
PG 14
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 877LF
UT WOS:000299181700002
ER
PT J
AU Gerber, H
Frick, G
AF Gerber, H.
Frick, G.
TI Drizzle rates and large sea-salt nuclei in small cumulus
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID GIANT AEROSOL-PARTICLES; WARM-RAIN INITIATION; TRADE-WIND CUMULUS; EARLY
RADAR ECHOES; SHALLOW CUMULUS; CLOUDS; MARITIME; ENTRAINMENT;
ENVIRONMENT; CONVECTION
AB The role of large sea-salt condensation nuclei generated by wind blowing over the ocean surface is evaluated by applying a Lagrangian parcel model to a range of conditions based on observations made during NCAR research flight RF12 of the Rain in Cumulus over the Ocean (RICO) trade wind cumulus (Cu) study in the Caribbean near Antigua. The model utilizes droplet condensation growth, a simplified droplet sedimentation scheme, and quasi-stochastic coalescence to calculate drizzle rates 1100 m above Cu base. The calculations are repeated without the sea-salt solution droplets to permit calculation of a drizzle rate enhancement factor (Df) owing to the large nuclei. The model predicts a small effect of the large nuclei on the RF12 drizzle rate, as well as suggesting the same for other RICO flights in agreement with radar studies of the same Cu that also show at most a small effect on precipitation due to the large nuclei. These findings are contrary to those some other studies of the Cu. The present study agrees with several previous studies that large nuclei affect the drizzle rate for wind speeds greater than about 10 m s(-1), that the rate increases as wind speed increases, and that the rate increases as droplet concentration becomes larger at constant wind speed. Df values are fit with an analytical expression relating drizzle rate with wind speed and in-cloud droplet concentration.
C1 [Gerber, H.] Gerber Sci Inc, Reston, VA 20190 USA.
[Frick, G.] USN, Res Lab, Washington, DC 20375 USA.
RP Gerber, H (reprint author), Gerber Sci Inc, 1643 Bentana Way, Reston, VA 20190 USA.
EM hgerber6@comcast.net
FU National Science Foundation
FX Thanks to Bjorn Stevens, Robert Rauber, Harry Ochs, and Charlie Knight
for organizing RICO. Appreciation is expressed to the Research Aviation
Facility (RAF) of NCAR for their excellent running of RICO. Louise
Nuijens is thanked for providing the radar precipitation data. This work
was supported by the National Science Foundation.
NR 29
TC 4
Z9 4
U1 1
U2 10
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD JAN 13
PY 2012
VL 117
AR D01205
DI 10.1029/2011JD016249
PG 7
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 877LF
UT WOS:000299181700004
ER
PT J
AU Glazov, MM
Yugova, IA
Efros, AL
AF Glazov, M. M.
Yugova, I. A.
Efros, Al L.
TI Electron spin synchronization induced by optical nuclear magnetic
resonance feedback
SO PHYSICAL REVIEW B
LA English
DT Article
ID QUANTUM DOTS
AB We predict a new physical mechanism to explain the electron spin precession frequency focusing effect recently observed in singly charged quantum dots exposed to a periodic train of resonant circularly polarized short optical pulses [A. Greilich et al., Science 317, 1896 (2007)]. We show that electron spin precession in an external magnetic field and a field of nuclei creates a Knight field oscillating at the frequency of the nuclear spin resonance. This field drives the projection of the nuclear spin onto the magnetic field to the value that makes the electron spin precession frequency a multiple of the train cyclic repetition frequency, the condition at which the Knight field vanishes.
C1 [Glazov, M. M.] Ioffe Phys Tech Inst RAS, RU-194021 St Petersburg, Russia.
[Yugova, I. A.] St Petersburg State Univ, Inst Phys, RU-198504 St Petersburg, Russia.
[Efros, Al L.] USN, Res Lab, Washington, DC 20375 USA.
RP Glazov, MM (reprint author), Ioffe Phys Tech Inst RAS, RU-194021 St Petersburg, Russia.
RI Glazov, Mikhail/I-7768-2013; Yugova, Irina/F-6823-2011
OI Glazov, Mikhail/0000-0003-4462-0749; Yugova, Irina/0000-0003-0020-3679
FU RFBR; "Dynasty" Foundation-ICFPM; Alexander von Humboldt Foundation;
Office of Naval Research
FX Authors thank A. Braker, I. V. Ignatiev, E. L. Ivchenko, and E. I.
Rashba for valuable discussions and RFBR, "Dynasty" Foundation-ICFPM,
Alexander von Humboldt Foundation, and the Office of Naval Research for
support.
NR 26
TC 12
Z9 12
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 JAN 13
PY 2012
VL 85
IS 4
AR 041303
DI 10.1103/PhysRevB.85.041303
PG 5
WC Physics, Condensed Matter
SC Physics
GA 876PA
UT WOS:000299118500001
ER
PT J
AU Ackermann, M
Ajello, M
Ballet, J
Barbiellini, G
Bastieri, D
Belfiore, A
Bellazzini, R
Berenji, B
Blandford, RD
Bloom, ED
Bonamente, E
Borgland, AW
Bregeon, J
Brigida, M
Bruel, P
Buehler, R
Buson, S
Caliandro, GA
Cameron, RA
Caraveo, PA
Cavazzuti, E
Cecchi, C
Celik, O
Charles, E
Chaty, S
Chekhtman, A
Cheung, CC
Chiang, J
Ciprini, S
Claus, R
Cohen-Tanugi, J
Corbel, S
Corbet, RHD
Cutini, S
de Luca, A
den Hartog, PR
de Palma, F
Dermer, CD
Digel, SW
Silva, EDE
Donato, D
Drell, PS
Drlica-Wagner, A
Dubois, R
Dubus, G
Favuzzi, C
Fegan, SJ
Ferrara, EC
Focke, WB
Fortin, P
Fukazawa, Y
Funk, S
Fusco, P
Gargano, F
Gasparrini, D
Gehrels, N
Germani, S
Giglietto, N
Giordano, F
Giroletti, M
Glanzman, T
Godfrey, G
Grenier, IA
Grove, JE
Guiriec, S
Hadasch, D
Hanabata, Y
Harding, AK
Hayashida, M
Hays, E
Hill, AB
Hughes, RE
Johannesson, G
Johnson, AS
Johnson, TJ
Kamae, T
Katagiri, H
Kataoka, J
Kerr, M
Knodlseder, J
Kuss, M
Lande, J
Longo, F
Loparco, F
Lovellette, MN
Lubrano, P
Mazziotta, MN
McEnery, JE
Michelson, PF
Mitthumsiri, W
Mizuno, T
Monte, C
Monzani, ME
Morselli, A
Moskalenko, IV
Murgia, S
Nakamori, T
Naumann-Godo, M
Norris, JP
Nuss, E
Ohno, M
Ohsugi, T
Okumura, A
Omodei, N
Orlando, E
Ozaki, M
Paneque, D
Parent, D
Pesce-Rollins, M
Pierbattista, M
Piron, F
Pivato, G
Porter, TA
Raino, S
Rando, R
Razzano, M
Reimer, A
Reimer, O
Ritz, S
Romani, RW
Roth, M
Parkinson, PMS
Sgro, C
Siskind, EJ
Spandre, G
Spinelli, P
Suson, DJ
Takahashi, H
Tanaka, T
Thayer, JG
Thayer, JB
Thompson, DJ
Tibaldo, L
Tinivella, M
Torres, DF
Tosti, G
Troja, E
Uchiyama, Y
Usher, TL
Vandenbroucke, J
Vianello, G
Vitale, V
Waite, AP
Winer, BL
Wood, KS
Wood, M
Yang, Z
Zimmer, S
Coe, MJ
Di Mille, F
Edwards, PG
Filipovic, MD
Payne, JL
Stevens, J
Torres, MAP
AF Ackermann, M.
Ajello, M.
Ballet, J.
Barbiellini, G.
Bastieri, D.
Belfiore, A.
Bellazzini, R.
Berenji, B.
Blandford, R. D.
Bloom, E. D.
Bonamente, E.
Borgland, A. W.
Bregeon, J.
Brigida, M.
Bruel, P.
Buehler, R.
Buson, S.
Caliandro, G. A.
Cameron, R. A.
Caraveo, P. A.
Cavazzuti, E.
Cecchi, C.
Celik, Oe.
Charles, E.
Chaty, S.
Chekhtman, A.
Cheung, C. C.
Chiang, J.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
Corbel, S.
Corbet, R. H. D.
Cutini, S.
de Luca, A.
den Hartog, P. R.
de Palma, F.
Dermer, C. D.
Digel, S. W.
do Couto e Silva, E.
Donato, D.
Drell, P. S.
Drlica-Wagner, A.
Dubois, R.
Dubus, G.
Favuzzi, C.
Fegan, S. J.
Ferrara, E. C.
Focke, W. B.
Fortin, P.
Fukazawa, Y.
Funk, S.
Fusco, P.
Gargano, F.
Gasparrini, D.
Gehrels, N.
Germani, S.
Giglietto, N.
Giordano, F.
Giroletti, M.
Glanzman, T.
Godfrey, G.
Grenier, I. A.
Grove, J. E.
Guiriec, S.
Hadasch, D.
Hanabata, Y.
Harding, A. K.
Hayashida, M.
Hays, E.
Hill, A. B.
Hughes, R. E.
Johannesson, G.
Johnson, A. S.
Johnson, T. J.
Kamae, T.
Katagiri, H.
Kataoka, J.
Kerr, M.
Knoedlseder, J.
Kuss, M.
Lande, J.
Longo, F.
Loparco, F.
Lovellette, M. N.
Lubrano, P.
Mazziotta, M. N.
McEnery, J. E.
Michelson, P. F.
Mitthumsiri, W.
Mizuno, T.
Monte, C.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Murgia, S.
Nakamori, T.
Naumann-Godo, M.
Norris, J. P.
Nuss, E.
Ohno, M.
Ohsugi, T.
Okumura, A.
Omodei, N.
Orlando, E.
Ozaki, M.
Paneque, D.
Parent, D.
Pesce-Rollins, M.
Pierbattista, M.
Piron, F.
Pivato, G.
Porter, T. A.
Raino, S.
Rando, R.
Razzano, M.
Reimer, A.
Reimer, O.
Ritz, S.
Romani, R. W.
Roth, M.
Parkinson, P. M. Saz
Sgro, C.
Siskind, E. J.
Spandre, G.
Spinelli, P.
Suson, D. J.
Takahashi, H.
Tanaka, T.
Thayer, J. G.
Thayer, J. B.
Thompson, D. J.
Tibaldo, L.
Tinivella, M.
Torres, D. F.
Tosti, G.
Troja, E.
Uchiyama, Y.
Usher, T. L.
Vandenbroucke, J.
Vianello, G.
Vitale, V.
Waite, A. P.
Winer, B. L.
Wood, K. S.
Wood, M.
Yang, Z.
Zimmer, S.
Coe, M. J.
Di Mille, F.
Edwards, P. G.
Filipovic, M. D.
Payne, J. L.
Stevens, J.
Torres, M. A. P.
CA Fermi LAT Collaboration
TI Periodic Emission from the Gamma-Ray Binary 1FGL J1018.6-5856
SO SCIENCE
LA English
DT Article
ID LARGE-AREA TELESCOPE; LS 5039; MICROQUASAR LS-5039; FERMI; MODULATION;
DISCOVERY; PULSARS; CATALOG; STARS; MASS
AB Gamma-ray binaries are stellar systems containing a neutron star or black hole, with gamma-ray emission produced by an interaction between the components. These systems are rare, even though binary evolution models predict dozens in our Galaxy. A search for gamma-ray binaries with the Fermi Large Area Telescope (LAT) shows that 1FGL J1018.6-5856 exhibits intensity and spectral modulation with a 16.6-day period. We identified a variable x-ray counterpart, which shows a sharp maximum coinciding with maximum gamma-ray emission, as well as an O6V((f)) star optical counterpart and a radio counterpart that is also apparently modulated on the orbital period. 1FGL J1018.6-5856 is thus a gamma-ray binary, and its detection suggests the presence of other fainter binaries in the Galaxy.
C1 [Ackermann, M.; Ajello, M.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; den Hartog, P. R.; Digel, S. W.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Dubois, R.; Focke, W. B.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Johnson, A. S.; Kamae, T.; Kerr, M.; Lande, J.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Okumura, A.; Omodei, N.; Orlando, E.; Paneque, D.; Porter, T. A.; Reimer, A.; Reimer, O.; Romani, R. W.; Tanaka, T.; Thayer, J. G.; Thayer, J. B.; Uchiyama, Y.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wood, M.] Stanford Univ, Dept Phys, Kavli Inst Particle Astrophys & Cosmol, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA.
[Ackermann, M.; Ajello, M.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; den Hartog, P. R.; Digel, S. W.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Dubois, R.; Focke, W. B.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Johnson, A. S.; Kamae, T.; Kerr, M.; Lande, J.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Okumura, A.; Omodei, N.; Orlando, E.; Paneque, D.; Porter, T. A.; Reimer, A.; Reimer, O.; Romani, R. W.; Tanaka, T.; Thayer, J. G.; Thayer, J. B.; Uchiyama, Y.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wood, M.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
[Ballet, J.; Chaty, S.; Corbel, S.; Grenier, I. A.; Naumann-Godo, M.; Pierbattista, M.] Univ Paris Diderot, CNRS, CEA IRFU, Lab AIM,Serv Astrophys,CEA Saclay, F-91191 Gif Sur Yvette, France.
[Barbiellini, G.; Longo, F.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Barbiellini, G.; Longo, F.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
[Bastieri, D.; Buson, S.; Rando, R.; Tibaldo, L.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Bastieri, D.; Buson, S.; Pivato, G.; Rando, R.; Tibaldo, L.] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
[Belfiore, A.; Razzano, M.; Ritz, S.; Parkinson, P. M. Saz] Univ Calif Santa Cruz, Dept Phys, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA.
[Belfiore, A.; Razzano, M.; Ritz, S.; Parkinson, P. M. Saz] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Belfiore, A.] Univ Pavia, I-27100 Pavia, Italy.
[Belfiore, A.; Caraveo, P. A.] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy.
[Bellazzini, R.; Bregeon, J.; Kuss, M.; Pesce-Rollins, M.; Razzano, M.; Sgro, C.; Spandre, G.; Tinivella, M.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Bonamente, E.; Cecchi, C.; Germani, S.; Lubrano, P.; Tosti, G.] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy.
[Bonamente, E.; Cecchi, C.; Ciprini, S.; Germani, S.; Lubrano, P.; Tosti, G.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Univ Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Politecn Bari, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Gargano, F.; Giglietto, N.; Giordano, F.; Loparco, F.; Mazziotta, M. N.; Monte, C.; Raino, S.; Spinelli, P.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Bruel, P.; Fegan, S. J.; Fortin, P.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Caliandro, G. A.; Hadasch, D.; Torres, D. F.] Inst Ciencies Espai IEEE CSIC, Barcelona 08193, Spain.
[Cavazzuti, E.; Cutini, S.; Gasparrini, D.] Agenzia Spaziale Italiana ASI Sci Data Ctr, I-00044 Rome, Italy.
[Celik, Oe.; Corbet, R. H. D.; Ferrara, E. C.; Gehrels, N.; Harding, A. K.; Hays, E.; McEnery, J. E.; Thompson, D. J.; Troja, E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Celik, Oe.; Donato, D.] Ctr Res & Explorat Space Sci & Technol, Greenbelt, MD 20771 USA.
[Celik, Oe.; Corbet, R. H. D.] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA.
[Chekhtman, A.] Artep Inc, Ellicott City, MD 21042 USA.
[Cheung, C. C.; Johnson, T. J.] Natl Acad Sci, Natl Res Council, Washington, DC 20001 USA.
[Ciprini, S.] ASI Sci Data Ctr, I-00044 Rome, Italy.
[Cohen-Tanugi, J.; Nuss, E.; Piron, F.] Univ Montpellier 2, CNRS, IN2P3, Lab Universe & Particules Montpellier, Montpellier, France.
[Corbel, S.] Inst Univ France, F-75005 Paris, France.
[de Luca, A.] Ist Univ Super, I-27100 Pavia, Italy.
[Dermer, C. D.; Grove, J. E.; Lovellette, M. N.; Wood, K. S.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Donato, D.; McEnery, J. E.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[Donato, D.; McEnery, J. E.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Dubus, G.] Univ Grenoble 1, CNRS, UMR 5274, Inst Planetol & Astrophys Grenoble,INSU, F-38041 Grenoble, France.
[Fukazawa, Y.; Hanabata, Y.; Kataoka, J.; Mizuno, T.] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan.
[Giroletti, M.] INAF Ist Radioastron, I-40129 Bologna, Italy.
[Guiriec, S.] Univ Alabama, Ctr Space Plasma & Aeron Res, Huntsville, AL 35899 USA.
[Hayashida, M.] Kyoto Univ, Grad Sch Sci, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan.
[Hill, A. B.; Coe, M. J.] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England.
[Hughes, R. E.; Winer, B. L.] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Dept Phys, Columbus, OH 43210 USA.
[Johannesson, G.] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland.
[Katagiri, H.] Ibaraki Univ, Coll Sci, Mito, Ibaraki 3108512, Japan.
[Nakamori, T.] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan.
[Knoedlseder, J.] IRAP, CNRS, F-31028 Toulouse 4, France.
[Knoedlseder, J.] Univ Toulouse, UPS OMP, IRAP, GAHEC, Toulouse, France.
[Morselli, A.] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.
[Norris, J. P.; Vitale, V.] Boise State Univ, Dept Phys, Boise, ID 83725 USA.
[Ohno, M.; Okumura, A.; Ozaki, M.] JAXA, Inst Space & Astronaut Sci, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan.
[Ohsugi, T.; Takahashi, H.] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan.
[Orlando, E.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Paneque, D.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Parent, D.] George Mason Univ, Coll Sci, Ctr Earth Observing & Space Res, Fairfax, VA 22030 USA.
[Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria.
[Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria.
[Roth, M.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Siskind, E. J.] NYCB Real Time Comp Inc, Lattingtown, NY 11560 USA.
[Suson, D. J.] Purdue Univ Calumet, Dept Chem & Phys, Hammond, IN 46323 USA.
[Torres, D. F.] ICREA, Barcelona, Spain.
[Vianello, G.] CIFS, I-10133 Turin, Italy.
[Vitale, V.] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
[Yang, Z.; Zimmer, S.] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden.
[Yang, Z.; Zimmer, S.] Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.
[Di Mille, F.] Las Campanas Observ, Australian Astron Observ, La Serena, Chile.
[Edwards, P. G.] CSIRO Astron & Space Sci, Australia Telescope Natl Facil, Narrabri, NSW 2390, Australia.
[Filipovic, M. D.; Payne, J. L.] Univ Western Sydney, Penrith, NSW 2751, Australia.
[Stevens, J.] CSIRO Astron & Space Sci, Epping, NSW 1710, Australia.
[Torres, M. A. P.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Cheung, CC (reprint author), USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
EM teddy.cheung.ctr@nrl.navy.mil; robin.corbet@nasa.gov; kerrm@stanford.edu
RI Funk, Stefan/B-7629-2015; Johannesson, Gudlaugur/O-8741-2015; Loparco,
Francesco/O-8847-2015; Gargano, Fabio/O-8934-2015; Moskalenko,
Igor/A-1301-2007; Mazziotta, Mario /O-8867-2015; Sgro,
Carmelo/K-3395-2016; Torres, Diego/O-9422-2016; Orlando, E/R-5594-2016;
Thompson, David/D-2939-2012; Gehrels, Neil/D-2971-2012; Harding,
Alice/D-3160-2012; Hays, Elizabeth/D-3257-2012; McEnery,
Julie/D-6612-2012; lubrano, pasquale/F-7269-2012; Morselli,
Aldo/G-6769-2011; Kuss, Michael/H-8959-2012; giglietto,
nicola/I-8951-2012; Reimer, Olaf/A-3117-2013; Tosti, Gino/E-9976-2013;
Saz Parkinson, Pablo Miguel/I-7980-2013; Ozaki, Masanobu/K-1165-2013;
Rando, Riccardo/M-7179-2013
OI Chaty, Sylvain/0000-0002-5769-8601; Pesce-Rollins,
Melissa/0000-0003-1790-8018; De Luca, Andrea/0000-0001-6739-687X;
Giroletti, Marcello/0000-0002-8657-8852; Cutini,
Sara/0000-0002-1271-2924; Gasparrini, Dario/0000-0002-5064-9495; Funk,
Stefan/0000-0002-2012-0080; Johannesson, Gudlaugur/0000-0003-1458-7036;
Loparco, Francesco/0000-0002-1173-5673; Gargano,
Fabio/0000-0002-5055-6395; Moskalenko, Igor/0000-0001-6141-458X;
Mazziotta, Mario /0000-0001-9325-4672; Torres,
Diego/0000-0002-1522-9065; Caraveo, Patrizia/0000-0003-2478-8018; Sgro',
Carmelo/0000-0001-5676-6214; Hill, Adam/0000-0003-3470-4834; Bastieri,
Denis/0000-0002-6954-8862; Omodei, Nicola/0000-0002-5448-7577; Thompson,
David/0000-0001-5217-9135; lubrano, pasquale/0000-0003-0221-4806;
Morselli, Aldo/0000-0002-7704-9553; giglietto,
nicola/0000-0002-9021-2888; Reimer, Olaf/0000-0001-6953-1385;
FU NASA (United States); U.S. Department of Energy (United States);
CEA/Irfu (France); IN2P3/CNRS (France); ASI (Italy); INFN (Italy); MEXT
(Japan); KEK (Japan); JAXA (Japan); K. A. Wallenberg Foundation; Swedish
Research Council; National Space Board (Sweden); CNES in France;
European Community [ERC-StG-200911]
FX The Fermi LAT Collaboration acknowledges support from a number of
agencies and institutes for both development and the operation of the
LAT as well as scientific data analysis. These include NASA and the U.S.
Department of Energy (United States); CEA/Irfu and IN2P3/CNRS (France);
ASI and INFN (Italy); MEXT, KEK, and JAXA (Japan); and the K. A.
Wallenberg Foundation, the Swedish Research Council, and the National
Space Board (Sweden). Additional support from INAF in Italy and CNES in
France for science analysis during the operations phase is also
gratefully acknowledged. Fermi LAT data are available from the Fermi
Science Support Center (http://fermi.gsfc.nasa.gov/ssc). This work made
use of data supplied by the UK Swift Science Data Centre at the
University of Leicester. G. D. was supported by European Community
contract ERC-StG-200911.
NR 26
TC 37
Z9 37
U1 1
U2 17
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
EI 1095-9203
J9 SCIENCE
JI Science
PD JAN 13
PY 2012
VL 335
IS 6065
BP 189
EP 193
DI 10.1126/science.1213974
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 875LZ
UT WOS:000299033100045
ER
PT J
AU Hlaing, S
Gilerson, A
Harmel, T
Tonizzo, A
Weidemann, A
Arnone, R
Ahmed, S
AF Hlaing, Soe
Gilerson, Alexander
Harmel, Tristan
Tonizzo, Alberto
Weidemann, Alan
Arnone, Robert
Ahmed, Samir
TI Assessment of a bidirectional reflectance distribution correction of
above-water and satellite water-leaving radiance in coastal waters
SO APPLIED OPTICS
LA English
DT Article
ID REMOTE-SENSING REFLECTANCE; INHERENT OPTICAL-PROPERTIES; OCEANIC WATERS;
PHASE FUNCTION; NATURAL PHYTOPLANKTON; DIFFUSE-REFLECTANCE; SHALLOW
WATERS; CASE-2 WATERS; MODEL; COLOR
AB Water-leaving radiances, retrieved from in situ or satellite measurements, need to be corrected for the bidirectional properties of the measured light in order to standardize the data and make them comparable with each other. The current operational algorithm for the correction of bidirectional effects from the satellite ocean color data is optimized for typical oceanic waters. However, versions of bidirectional reflectance correction algorithms specifically tuned for typical coastal waters and other case 2 conditions are particularly needed to improve the overall quality of those data. In order to analyze the bidirectional reflectance distribution function (BRDF) of case 2 waters, a dataset of typical remote sensing reflectances was generated through radiative transfer simulations for a large range of viewing and illumination geometries. Based on this simulated dataset, a case 2 water focused remote sensing reflectance model is proposed to correct above-water and satellite water-leaving radiance data for bidirectional effects. The proposed model is first validated with a one year time series of in situ above-water measurements acquired by collocated multispectral and hyperspectral radiometers, which have different viewing geometries installed at the Long Island Sound Coastal Observatory (LISCO). Match-ups and intercomparisons performed on these concurrent measurements show that the proposed algorithm outperforms the algorithm currently in use at all wavelengths, with average improvement of 2.4% over the spectral range. LISCO's time series data have also been used to evaluate improvements in match-up comparisons of Moderate Resolution Imaging Spectroradiometer satellite data when the proposed BRDF correction is used in lieu of the current algorithm. It is shown that the discrepancies between coincident in-situ sea-based and satellite data decreased by 3.15% with the use of the proposed algorithm. This confirms the advantages of the proposed model over the current one, demonstrating the need for a specific case 2 water BRDF correction algorithm as well as the feasibility of enhancing performance of current and future satellite ocean color remote sensing missions for monitoring of typical coastal waters.
C1 [Hlaing, Soe; Gilerson, Alexander; Harmel, Tristan; Tonizzo, Alberto; Ahmed, Samir] CUNY City Coll, Opt Remote Sensing Lab, New York, NY 10031 USA.
[Weidemann, Alan; Arnone, Robert] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Gilerson, A (reprint author), CUNY City Coll, Opt Remote Sensing Lab, New York, NY 10031 USA.
EM gilerson@ccny.cuny.edu
RI harmel, tristan/I-1991-2012
OI harmel, tristan/0000-0002-1172-9636
FU NOAA; Office of Naval Research; NASA AERONET team
FX This work has been partially supported by grants from NOAA and the
Office of Naval Research. We would like to thank the NASA AERONET team
for SeaPRISM calibration, data processing, and support of site
operations and the NASA Ocean Color Processing Group for satellite
imagery. We would also like to thank T. Legbandt and I. Ioannou for help
in operating LISCO instruments and useful discussions. We are grateful
to the editor and two anonymous reviewers for their comments and useful
suggestions.
NR 47
TC 7
Z9 7
U1 1
U2 14
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 JAN 10
PY 2012
VL 51
IS 2
BP 220
EP 237
PG 18
WC Optics
SC Optics
GA 879EY
UT WOS:000299313700011
PM 22270520
ER
PT J
AU Abdo, AA
Wood, KS
DeCesar, ME
Gargano, F
Giordano, F
Ray, PS
Parent, D
Harding, AK
Miller, MC
Wood, DL
Wolff, MT
AF Abdo, A. A.
Wood, K. S.
DeCesar, M. E.
Gargano, F.
Giordano, F.
Ray, P. S.
Parent, D.
Harding, A. K.
Miller, M. Coleman
Wood, D. L.
Wolff, M. T.
TI PSR J0007+7303 IN THE CTA1 SUPERNOVA REMNANT: NEW GAMMA-RAY RESULTS FROM
TWO YEARS OF FERMI LARGE AREA TELESCOPE OBSERVATIONS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE gamma rays: stars; pulsars: individual: PSR J0007+7303; supernovae:
individual (G119.5+10.2)
ID X-RAY; EGRET DATA; PARAMETER-ESTIMATION; NEUTRINO EMISSION; LIGHT
CURVES; PULSAR; RADIO; SEARCH; CATALOG; NEBULA
AB One of the main results of the Fermi Gamma-Ray Space Telescope is the discovery of gamma-ray selected pulsars. The high magnetic field pulsar, PSR J0007+7303 in CTA1, was the first ever to be discovered through its gamma-ray pulsations. Based on analysis of two years of Large Area Telescope (LAT) survey data, we report on the discovery of gamma-ray emission in the off-pulse phase interval at the similar to 6 sigma level. The emission appears to be extended at the similar to 2 sigma level with a disk of extension similar to 0.degrees 6. level. The flux from this emission in the energy range E >= 100 MeV is F-100 = (1.73 +/- 0.40(stat) +/- 0.18(sys)) x 10(-8) photons cm(-2) s(-1) and is best fitted by a power law with a photon index of Gamma = 2.54 +/- 0.14(stat) +/- 0.05(sys). The pulsed gamma-ray flux in the same energy range is F-100 = (3.95 +/- 0.07(stat) +/- 0.30(sys)) x 10 (7) photons cm (2) s (1) and is best fitted by an exponentially cutoff power-law spectrum with a photon index of Gamma = 1.41 +/- 0.23(stat) +/- 0.03(sys) and a cutoff energy E-c = 4.04 +/- 0.20(stat) +/- 0.67(sys) GeV. We find no flux variability either at the 2009 May glitch or in the long-term behavior. We model the gamma-ray light curve with two high-altitude emission models, the outer gap and slot gap, and find that the preferred model depends strongly on the assumed origin of the off-pulse emission. Both models favor a large angle between the magnetic axis and observer line of sight, consistent with the nondetection of radio emission being a geometrical effect. Finally, we discuss how the LAT results bear on the understanding of the cooling of this neutron star.
C1 [Abdo, A. A.; Parent, D.] George Mason Univ, Ctr Earth Observing & Space Res, Coll Sci, Fairfax, VA 22030 USA.
[Wood, K. S.; Ray, P. S.; Wolff, M. T.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
[DeCesar, M. E.; Harding, A. K.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[DeCesar, M. E.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[DeCesar, M. E.; Miller, M. Coleman] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Gargano, F.; Giordano, F.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Giordano, F.] Univ Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
[Giordano, F.] Politecn Bari, I-70126 Bari, Italy.
[Wood, D. L.] Praxis Inc, Alexandria, VA 22303 USA.
RP Abdo, AA (reprint author), George Mason Univ, Ctr Earth Observing & Space Res, Coll Sci, Fairfax, VA 22030 USA.
RI Harding, Alice/D-3160-2012; Gargano, Fabio/O-8934-2015
OI Giordano, Francesco/0000-0002-8651-2394; Ray, Paul/0000-0002-5297-5278;
Gargano, Fabio/0000-0002-5055-6395
FU National Aeronautics and Space Administration; Department of Energy in
the United States; Commissariat a l'Energie Atomique; Centre National de
la Recherche Scientifique/Institut National de Physique Nucleaire et de
Physique des Particules in France; Agenzia Spaziale Italiana and the
Istituto Nazionale di Fisica Nucleare in Italy; Ministry of Education,
Culture, Sports, Science and Technology (MEXT); High Energy Accelerator
Research Organization (KEK); Japan Aerospace Exploration Agency (JAXA)
in Japan; K. A. Wallenberg Foundation; Swedish Research Council; Swedish
National Space Board in Sweden; Naval Research Laboratory
[N000173-08-2-C004]
FX The Fermi-LAT Collaboration acknowledges generous ongoing support from a
number of agencies and institutes that have supported both the
development and the operation of the LAT as well as scientific data
analysis. These include the National Aeronautics and Space
Administration and the Department of Energy in the United States, the
Commissariat a l'Energie Atomique and the Centre National de la
Recherche Scientifique/Institut National de Physique Nucleaire et de
Physique des Particules in France, the Agenzia Spaziale Italiana and the
Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of
Education, Culture, Sports, Science and Technology (MEXT), High Energy
Accelerator Research Organization (KEK), and Japan Aerospace Exploration
Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish
Research Council, and the Swedish National Space Board in Sweden.; This
work was performed under contract with the Naval Research Laboratory,
contract N000173-08-2-C004 and was sponsored under a grant by NASA.
NR 35
TC 16
Z9 16
U1 0
U2 4
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 JAN 10
PY 2012
VL 744
IS 2
AR 146
DI 10.1088/0004-637X/744/2/146
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 870JW
UT WOS:000298666400066
ER
PT J
AU Baines, EK
Armstrong, JT
AF Baines, Ellyn K.
Armstrong, J. Thomas
TI CONFIRMING FUNDAMENTAL PROPERTIES OF THE EXOPLANET HOST STAR epsilon
ERIDANI USING THE NAVY OPTICAL INTERFEROMETER
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE planetary systems; stars: individual (HD 22049); techniques: high
angular resolution; techniques: interferometric
ID VEGA-LIKE STARS; EFFECTIVE TEMPERATURES; CHROMOSPHERIC EMISSION;
BOLOMETRIC CORRECTIONS; AGE; CALIBRATION; PARAMETERS; COLORS; ANALOG;
RADII
AB We measured the angular diameter of the exoplanet host star epsilon Eridani using the Navy Optical Interferometer. We determined its physical radius, effective temperature, and mass by combining our measurement with the star's parallax, photometry from the literature, and the Yonsei-Yale isochrones, respectively. We used the resulting stellar mass of 0.82 +/- 0.05 M-circle dot plus the mass function from Benedict et al. to calculate the planet's mass, which is 1.53 +/- 0.22 M-Jupiter. Using our new effective temperature, we also estimated the extent of the habitable zone for the system.
C1 [Baines, Ellyn K.; Armstrong, J. Thomas] USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA.
RP Baines, EK (reprint author), USN, Remote Sensing Div, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM ellyn.baines@nrl.navy.mil; tarmstr@crater.nrl.navy.mil
FU Office of Naval Research; Oceanographer of the Navy; National
Aeronautics and Space Administration; National Science Foundation
FX The Navy Optical Interferometer is a joint project of the Naval Research
Laboratory and the U.S. Naval Observatory, in cooperation with Lowell
Observatory, and is funded by the Office of Naval Research and the
Oceanographer of the Navy. This research has made use of the SIMBAD
database, operated at CDS, Strasbourg, France. This publication makes
use of data products from the Two Micron All Sky Survey, which is a
joint project of the University of Massachusetts and the Infrared
Processing and Analysis Center/California Institute of Technology,
funded by the National Aeronautics and Space Administration and the
National Science Foundation.
NR 36
TC 9
Z9 9
U1 0
U2 2
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 JAN 10
PY 2012
VL 744
IS 2
AR 138
DI 10.1088/0004-637X/744/2/138
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 870JW
UT WOS:000298666400058
ER
PT J
AU Hainline, LJ
Morgan, CW
Beach, JN
Kochanek, CS
Harris, HC
Tilleman, T
Fadely, R
Falco, EE
Le, TX
AF Hainline, Laura J.
Morgan, Christopher W.
Beach, Joseph N.
Kochanek, C. S.
Harris, Hugh C.
Tilleman, Trudy
Fadely, Ross
Falco, Emilio E.
Le, Truong X.
TI A NEW MICROLENSING EVENT IN THE DOUBLY IMAGED QUASAR Q 0957+561
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE accretion; accretion disks; gravitational lensing: micro; gravitational
lensing: strong; quasars: individual (Q0957+561)
ID GRAVITATIONAL LENS 0957+561; TIME-DELAY; ACCRETION DISK; LIGHT CURVES;
X-RAY; EMISSION REGIONS; MASS FUNCTION; PG 1115+080; Q0957+561;
QSO-0957+561
AB We present evidence for ultraviolet/optical microlensing in the gravitationally lensed quasar Q 0957+561. We combine new measurements from our optical monitoring campaign at the United States Naval Observatory, Flagstaff, with measurements from the literature and find that the time-delay-corrected r-band flux ratio m(A) - m(B) has increased by similar to 0.1 mag over a period of five years beginning in the fall of 2005. We apply our Monte Carlo microlensing analysis procedure to the composite light curves, obtaining a measurement of the optical accretion disk size, log{(r(s)/cm)[ cos(i)/0.5](1/2)} = 16.2 +/- 0.5, that is consistent with the quasar accretion disk size-black hole mass relation.
C1 [Hainline, Laura J.; Morgan, Christopher W.; Beach, Joseph N.; Le, Truong X.] USN Acad, Dept Phys, Annapolis, MD 21402 USA.
[Kochanek, C. S.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
[Harris, Hugh C.; Tilleman, Trudy] US Naval Observ, Flagstaff Stn, Flagstaff, AZ 86001 USA.
[Fadely, Ross] Haverford Coll, Dept Astron, Haverford, PA 19041 USA.
[Falco, Emilio E.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Hainline, LJ (reprint author), USN Acad, Dept Phys, 572C Holloway Rd, Annapolis, MD 21402 USA.
EM hainline@usna.edu; cmorgan@usna.edu; m110480@usna.edu;
ckochanek@astronomy.ohio-state.edu; hch@nofs.navy.mil;
trudy@nofs.navy.mil; rfadely@haverford.edu; falco@cfa.harvard.edu;
m113678@usna.edu
FU National Science Foundation [AST-0907848, AST-0708082, AST-1009756];
Research Corporation for Science Advancement; Chandrasekhar X-Ray Center
[11700501]
FX The authors thank L. Goicoechea, E. Turner, and R. McMillan for their
assistance in obtaining historical photometric data for Q0957. We also
thank the anonymous referee for suggestions which improved the data
presented in this paper. This material is based upon work supported by
the National Science Foundation under grant no AST-0907848 (to C. W.
M.), AST-0708082, and AST-1009756 (to C. S. K.). C. W. M. also
gratefully acknowledges support from the Research Corporation for
Science Advancement and Chandrasekhar X-Ray Center award 11700501.
NR 53
TC 10
Z9 10
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 10
PY 2012
VL 744
IS 2
AR 104
DI 10.1088/0004-637X/744/2/104
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 870JW
UT WOS:000298666400024
ER
PT J
AU Laming, JM
AF Laming, J. Martin
TI NON-WKB MODELS OF THE FIRST IONIZATION POTENTIAL EFFECT: THE ROLE OF
SLOW MODE WAVES
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: abundances; Sun: chromosphere; turbulence; waves
ID WIND HELIUM ABUNDANCE; SOLAR-WIND; ALFVEN WAVES; TRANSITION REGION;
CHARGE-TRANSFER; ACTIVE-REGION; ULTRAVIOLET SPECTRUM; ENERGETIC
PARTICLES; CORONAL ABUNDANCES; RATE COEFFICIENTS
AB A model for element abundance fractionation between the solar chromosphere and corona is further developed. The ponderomotive force due to Alfven waves propagating through or reflecting from the chromosphere in solar conditions generally accelerates chromospheric ions, but not neutrals, into the corona. This gives rise to what has become known as the first ionization potential effect. We incorporate new physical processes into the model. The chromospheric ionization balance is improved and the effect of different approximations is discussed. We also treat the parametric generation of slow mode waves by the parallel propagating Alfven waves. This is also an effect of the ponderomotive force, arising from the periodic variation of the magnetic pressure driving an acoustic mode, which adds to the background longitudinal pressure. This can have subtle effects on the fractionation, rendering it quasi-mass independent in the lower regions of the chromosphere. We also briefly discuss the change in the fractionation with Alfven wave frequency, relative to the frequency of the overlying coronal loop resonance.
C1 USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
RP Laming, JM (reprint author), USN, Div Space Sci, Res Lab, Code 7674L, Washington, DC 20375 USA.
FU NASA [NNH10A055I, NNH11AQ23I]; Office of Naval Research
FX This work was supported by NASA Contracts NNH10A055I, NNH11AQ23I, and by
basic research funds of the Office of Naval Research. I am also grateful
to Cara Rakowski for a critical reading of an earlier draft of this
paper.
NR 55
TC 28
Z9 28
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 JAN 10
PY 2012
VL 744
IS 2
AR 115
DI 10.1088/0004-637X/744/2/115
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 870JW
UT WOS:000298666400035
ER
PT J
AU Linford, JD
Taylor, GB
Romani, RW
Helmboldt, JF
Readhead, ACS
Reeves, R
Richards, JL
AF Linford, J. D.
Taylor, G. B.
Romani, R. W.
Helmboldt, J. F.
Readhead, A. C. S.
Reeves, R.
Richards, J. L.
TI CONTEMPORANEOUS VLBA 5 GHz OBSERVATIONS OF LARGE AREA TELESCOPE DETECTED
BLAZARS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: active; galaxies: jets; galaxies: nuclei; gamma rays:
galaxies; radio continuum: galaxies
ID ACTIVE GALACTIC NUCLEI; ALL-SKY SURVEY; POLARIMETRY-SURVEY VIPS; DOUBLE
RADIO-SOURCES; GAMMA-RAY; X-RAY; COMPLETE SAMPLE; ACCRETION DISK; EGRET
BLAZARS; JET
AB The radio properties of blazars detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope have been observed contemporaneously by the Very Long Baseline Array (VLBA). In total, 232 sources were observed with the VLBA. Ninety sources that were previously observed as part of the VLBA Imaging and Polarimetry Survey (VIPS) have been included in the sample, as well as 142 sources not found in VIPS. This very large, 5 GHz flux-limited sample of active galactic nuclei (AGNs) provides insights into the mechanism that produces strong gamma-ray emission. In particular, we see that gamma-ray emission is related to strong, uniform magnetic fields in the cores of the host AGN. Included in this sample are non-blazarAGNs such as 3C84, M82, and NGC 6251. For the blazars, the total VLBA radio flux density at 5 GHz correlates strongly with gamma-ray flux. The LAT BL Lac objects tend to be similar to the non-LAT BL Lac objects, but the LAT flat-spectrum radio quasars (FSRQs) are significantly different from the non-LAT FSRQs. Strong core polarization is significantly more common among the LAT sources, and core fractional polarization appears to increase during LAT detection.
C1 [Linford, J. D.; Taylor, G. B.] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA.
[Romani, R. W.] Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
[Helmboldt, J. F.] USN, Res Lab, Washington, DC 20375 USA.
[Readhead, A. C. S.; Reeves, R.; Richards, J. L.] CALTECH, Dept Astron, Pasadena, CA 91125 USA.
RP Linford, JD (reprint author), Univ New Mexico, Dept Phys & Astron, MSC07 4220, Albuquerque, NM 87131 USA.
RI Helmboldt, Joseph/C-8105-2012; Reeves, Rodrigo/H-2812-2014
OI Reeves, Rodrigo/0000-0001-5704-271X
FU National Aeronautics and Space Administration; NASA under FERMI [GSFC
21078/FERMI08-0051]; NRAO [GSSP10-011]
FX We thank the anonymous referee for helpful comments on the manuscript.
We thank Steve Tremblay, Marcello Giroletti and Bob Hastman for their
helpful advice and comments. We also thank Steve Myers and Josh Marvil
for their help with obtaining EVLA observations of several sources for
polarization angle calibration. The National Radio Astronomy Observatory
is a facility of the National Science Foundation operated under
cooperative agreement by Associated Universities, Inc. This work made
use of the Swinburne University of Technology software correlator,
developed as part of the Australian Major National Research Facilities
Programme and operated under license. The NASA/IPAC Extragalactic
Database (NED) is operated by the Jet Propulsion Laboratory, California
Institute of Technology, under contract with the National Aeronautics
and Space Administration. We thank NASA for support under FERMI grant
GSFC 21078/FERMI08-0051 and the NRAO for support under Student Observing
Support Award GSSP10-011.
NR 64
TC 31
Z9 32
U1 1
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 10
PY 2012
VL 744
IS 2
AR 177
DI 10.1088/0004-637X/744/2/177
PG 21
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 870JW
UT WOS:000298666400096
ER
PT J
AU Pletsch, HJ
Guillemot, L
Allen, B
Kramer, M
Aulbert, C
Fehrmann, H
Ray, PS
Barr, ED
Belfiore, A
Camilo, F
Caraveo, PA
Celik, O
Champion, DJ
Dormody, M
Eatough, RP
Ferrara, EC
Freire, PCC
Hessels, JWT
Keith, M
Kerr, M
de Luca, A
Lyne, AG
Marelli, M
McLaughlin, MA
Parent, D
Ransom, SM
Razzano, M
Reich, W
Parkinson, PMS
Stappers, BW
Wolff, MT
AF Pletsch, H. J.
Guillemot, L.
Allen, B.
Kramer, M.
Aulbert, C.
Fehrmann, H.
Ray, P. S.
Barr, E. D.
Belfiore, A.
Camilo, F.
Caraveo, P. A.
Celik, Oe.
Champion, D. J.
Dormody, M.
Eatough, R. P.
Ferrara, E. C.
Freire, P. C. C.
Hessels, J. W. T.
Keith, M.
Kerr, M.
de Luca, A.
Lyne, A. G.
Marelli, M.
McLaughlin, M. A.
Parent, D.
Ransom, S. M.
Razzano, M.
Reich, W.
Parkinson, P. M. Saz
Stappers, B. W.
Wolff, M. T.
TI DISCOVERY OF NINE GAMMA-RAY PULSARS IN FERMI LARGE AREA TELESCOPE DATA
USING A NEW BLIND SEARCH METHOD
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE gamma rays: stars; pulsars: general; pulsars: individual
ID TIME-DIFFERENCING TECHNIQUE; RADIO-CONTINUUM SURVEY; MILLISECOND
PULSARS; GRAVITATIONAL-WAVES; FREQUENCY SEARCHES; CATALOG; LAT;
SENSITIVITY; ATLAS; SKY
AB We report the discovery of nine previously unknown gamma-ray pulsars in a blind search of data from the Fermi Large Area Telescope (LAT). The pulsars were found with a novel hierarchical search method originally developed for detecting continuous gravitational waves from rapidly rotating neutron stars. Designed to find isolated pulsars spinning at up to kHz frequencies, the new method is computationally efficient and incorporates several advances, including a metric-based gridding of the search parameter space (frequency, frequency derivative, and sky location) and the use of photon probability weights. The nine pulsars have spin frequencies between 3 and 12 Hz, and characteristic ages ranging from 17 kyr to 3 Myr. Two of them, PSRs J1803-2149 and J2111+4606, are young and energetic Galactic-plane pulsars (spin-down power above 6 x 10(35) erg s(-1) and ages below 100 kyr). The seven remaining pulsars, PSRs J0106+4855, J0622+3749, J1620-4927, J1746-3239, J2028+3332, J2030+4415, and J2139+4716, are older and less energetic; two of them are located at higher Galactic latitudes (|b| > 10 degrees). PSR J0106+4855 has the largest characteristic age (3 Myr) and the smallest surface magnetic field (2 x 10(11) G) of all LAT blind-search pulsars. PSR J2139+4716 has the lowest spin-down power (3 x 10(33) erg s(-1)) among all non-recycled gamma-ray pulsars ever found. Despite extensivemulti-frequency observations, only PSR J0106+4855 has detectable pulsations in the radio band. The other eight pulsars belong to the increasing population of radio-quiet gamma-ray pulsars.
C1 [Pletsch, H. J.; Allen, B.; Aulbert, C.; Fehrmann, H.] Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-30167 Hannover, Germany.
[Allen, B.] Univ Wisconsin, Dept Phys, Milwaukee, WI 53211 USA.
[Pletsch, H. J.; Allen, B.; Aulbert, C.; Fehrmann, H.] Leibniz Univ Hannover, Inst Gravitat Phys, D-30167 Hannover, Germany.
[Guillemot, L.; Kramer, M.; Barr, E. D.; Champion, D. J.; Eatough, R. P.; Freire, P. C. C.; Reich, W.] Max Planck Inst Radioastron, D-53121 Bonn, Germany.
[Kramer, M.; Lyne, A. G.; Stappers, B. W.] Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England.
[Ray, P. S.; Wolff, M. T.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Belfiore, A.; Dormody, M.; Parkinson, P. M. Saz] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA.
[Belfiore, A.; Dormody, M.; Parkinson, P. M. Saz] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Belfiore, A.] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy.
[Belfiore, A.; Caraveo, P. A.; de Luca, A.; Marelli, M.] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy.
[Camilo, F.] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA.
[Celik, Oe.; Ferrara, E. C.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Celik, Oe.] Ctr Res & Explorat Space Sci & Technol CRESST, Greenbelt, MD 20771 USA.
[Celik, Oe.] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
[Celik, Oe.] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA.
[Hessels, J. W. T.] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1090 GE Amsterdam, Netherlands.
[Hessels, J. W. T.] Netherlands Inst Radio Astron ASTRON, NL-7990 AA Dwingeloo, Netherlands.
[Keith, M.] Australia Telescope Natl Facil, CSIRO Astron & Space Sci, Epping, NSW 1710, Australia.
[Kerr, M.] Stanford Univ, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA.
[Kerr, M.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
[de Luca, A.] Ist Univ Studi Super IUSS, I-27100 Pavia, Italy.
[McLaughlin, M. A.] W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA.
[Parent, D.] George Mason Univ, Ctr Earth Observing & Space Res, Coll Sci, Fairfax, VA 22030 USA.
[Ransom, S. M.] Natl Radio Astron Observ NRAO, Charlottesville, VA 22903 USA.
[Razzano, M.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
RP Pletsch, HJ (reprint author), Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-30167 Hannover, Germany.
EM holger.pletsch@aei.mpg.de; guillemo@mpifr-bonn.mpg.de
RI Allen, Bruce/K-2327-2012; Saz Parkinson, Pablo Miguel/I-7980-2013;
OI Marelli, Martino/0000-0002-8017-0338; Allen, Bruce/0000-0003-4285-6256;
Champion, David/0000-0003-1361-7723; Caraveo,
Patrizia/0000-0003-2478-8018; De Luca, Andrea/0000-0001-6739-687X;
Ransom, Scott/0000-0001-5799-9714; Ray, Paul/0000-0002-5297-5278
FU Max Planck Gesellschaft; U.S. National Science Foundation [0555655,
0970074, 1104902]; National Science Foundation
FX This work was partly supported by the Max Planck Gesellschaft and by
U.S. National Science Foundation Grants 0555655, 0970074, and 1104902.;
The National Radio Astronomy Observatory is a facility of the National
Science Foundation operated under cooperative agreement by Associated
Universities, Inc.
NR 67
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PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 10
PY 2012
VL 744
IS 2
AR 105
DI 10.1088/0004-637X/744/2/105
PG 20
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 870JW
UT WOS:000298666400025
ER
PT J
AU Wilson, TL
Casassus, S
Keating, KM
AF Wilson, T. L.
Casassus, S.
Keating, Katie M.
TI THE STRUCTURE OF NGC 1976 IN THE RADIO RANGE
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE H II regions; ISM: individual objects (NGC 1976, M42, Orion A); radio
continuum: ISM; radio lines: ISM
ID H-II-REGIONS; RECOMBINATION LINE OBSERVATIONS; ORION NEBULA;
PLANETARY-NEBULAE; TEMPERATURE; EMISSION; RESOLUTION; CONTINUUM;
ABUNDANCE; DISTANCE
AB High angular resolution radio continuum images of NGC 1976 (M42, Orion A) at nu = 330 MHz (lambda = 91 cm), 1.5 GHz (20 cm), and 10.6 GHz (2.8 cm) have been aligned, placed on a common grid, smoothed to common resolutions of 80 '' (=0.16 pc at 420 pc) and 90 '' (=0.18 pc) and compared on a position-by-position basis. The results are not consistent with a single value of T(e). The best fit to the continuum data is a multi-layer model based on radio recombination line data with a monotonic variation, from T(e) = 8500 K in the higher intensity, more compact region at the rear of NGC 1976 to T(e) = 6000 K in the low-intensity, extended region in the foreground. An estimate of temperature fluctuations toward the peak from this model yields t(2) = 0.003. This is a factor of 10 lower than fluctuation values from optical collisionally excited line data.
C1 [Wilson, T. L.; Keating, Katie M.] USN, Res Lab, Washington, DC 20375 USA.
[Casassus, S.] Univ Chile, Dept Astron, Santiago, Chile.
RP Wilson, TL (reprint author), USN, Res Lab, Code 7210, Washington, DC 20375 USA.
EM tom.wilson@nrl.navy.mil
RI Casassus, Simon/I-8609-2016
FU US Naval Research Laboratory; Millennium Science Initiative, Chilean
Ministry of Economy: Nucleus from FONDECYT [P10-022-F, 1100221]; CATA
[PFB-06]
FX We thank W. M. Goss, R. Subrahmanyan, and G. Taylor for providing the
digital form of the images used in the analysis. C. R. O'Dell and Y.
Tsamis provided useful comments, as did an anonymous referee. The
National Radio Astronomy Observatory is a facility of the National
Science Foundation operated under cooperative agreement by Associated
Universities, Inc. This research was performed while an author held a
National Research Council Research Associateship Award at the US Naval
Research Laboratory. S. C. acknowledges support from Millennium Science
Initiative, Chilean Ministry of Economy: Nucleus P10-022-F, from
FONDECYT grant 1100221, and from the CATA ("Fondo Basal PFB-06,
CONICYT").
NR 35
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U1 0
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PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD JAN 10
PY 2012
VL 744
IS 2
AR 161
DI 10.1088/0004-637X/744/2/161
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 870JW
UT WOS:000298666400081
ER
PT J
AU Spirkoska, D
Efros, AL
Lambrecht, WRL
Cheiwchanchamnangij, T
Morral, AFI
Abstreiter, G
AF Spirkoska, D.
Efros, Al L.
Lambrecht, W. R. L.
Cheiwchanchamnangij, T.
Fontcuberta i Morral, A.
Abstreiter, G.
TI Valence band structure of polytypic zinc-blende/wurtzite GaAs nanowires
probed by polarization-dependent photoluminescence
SO PHYSICAL REVIEW B
LA English
DT Article
ID WURTZITE; HETEROSTRUCTURES; SUPERLATTICES; ZINCBLENDE; HOLES
AB We conducted temperature-dependent measurements of the photoluminescence (PL) polarization on GaAs nanowires (NWs) with polytypic zinc-blende/wurtzite structure in order to probe the symmetry and energy structure of the valence band in the wurtzite segments of the NWs. The low-temperature measurements revealed that in most of the investigated cases, the ground level of the interface excitons responsible for the PL is formed by the heavy hole. To describe the observed temperature dependence of the degree of PL polarization, we developed a theoretical model that allows an estimation of the splitting between the heavy hole and light hole exciton subbands in these NWs. This splitting is smaller than expected in pure wurtzite on the basis of recent first-principles calculations, which may be attributed to the multiple twinned nature of the wurtzite sections, which effectively behave as a polytype of lower hexagonality.
C1 [Spirkoska, D.; Abstreiter, G.] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany.
[Spirkoska, D.; Abstreiter, G.] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany.
[Efros, Al L.] USN, Res Lab, Washington, DC 20375 USA.
[Lambrecht, W. R. L.; Cheiwchanchamnangij, T.] Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA.
[Fontcuberta i Morral, A.] Ecole Polytech Fed Lausanne, Lab Mat Semicond, Inst Mat, Lausanne, Switzerland.
RP Spirkoska, D (reprint author), Tech Univ Munich, Walter Schottky Inst, Coulombwall 4, D-85748 Garching, Germany.
RI Fontcuberta i Morral, Anna/B-9884-2008; Lambrecht, Walter/O-1083-2016
FU SENFED; DFG excellence initiative Nanosystems Initiative Munich; SFB
[631]; Institute of Advanced Study of the Technische Universitat
Munchen; Office of Naval Research; Alexander-von-Humboldt Foundation
FX The authors thank Prof. J. Arbiol and Prof. J. Morante for the TEM
analysis on the nanowires as well as the TEM facilities in the Serveis
Cientificotecnics in Universitat de Barcelona. This research was
supported by the fundings provided by the Marie Curie Excellence Grant
SENFED, the DFG excellence initiative Nanosystems Initiative Munich, and
the SFB 631, as well as the Institute of Advanced Study of the
Technische Universitat Munchen. A. L. E. acknowledges support of the
Office of Naval Research and the Alexander-von-Humboldt Foundation.
NR 45
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U1 0
U2 35
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 JAN 10
PY 2012
VL 85
IS 4
AR 045309
DI 10.1103/PhysRevB.85.045309
PG 11
WC Physics, Condensed Matter
SC Physics
GA 874WB
UT WOS:000298987700001
ER
PT J
AU Siskind, DE
Drob, DP
Emmert, JT
Stevens, MH
Sheese, PE
Llewellyn, EJ
Hervig, ME
Niciejewski, R
Kochenash, AJ
AF Siskind, David E.
Drob, Douglas P.
Emmert, John T.
Stevens, Michael H.
Sheese, Patrick E.
Llewellyn, Edward J.
Hervig, Mark E.
Niciejewski, Rick
Kochenash, Andrew J.
TI Linkages between the cold summer mesopause and thermospheric zonal mean
circulation
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
AB We present the first results from the NCAR thermosphere/ionosphere/electrodynamics general circulation model (TIE-GCM) coupled to a weather forecast/assimilation system of the lower and middle atmosphere. Our results emphasize the importance of a proper representation of the latitudinal temperature variation at the base of the thermosphere for calculating zonal mean zonal winds in the thermosphere. The inclusion of a realistic cold summer mesopause yields significantly improved agreement with climatology in the calculated thermospheric winds in the summer hemisphere. Having established this link between the temperature structure of the mesosphere and the thermospheric circulation, we next present observational evidence that the year-to-year variability of thermospheric winds can be linked to analogous variations in the onset of the cold summer mesopause season. Since these mesopause variations have previously been ascribed to stratospheric weather variability, by extension, our results suggest a new mode of coupling between the stratosphere and thermosphere. Citation: Siskind, D. E., D. P. Drob, J. T. Emmert, M. H. Stevens, P. E. Sheese, E. J. Llewellyn, M. E. Hervig, R. Niciejewski, and A. J. Kochenash (2012), Linkages between the cold summer mesopause and thermospheric zonal mean circulation, Geophys. Res. Lett., 39, L01804, doi:10.1029/2011GL050196.
C1 [Siskind, David E.; Drob, Douglas P.; Emmert, John T.; Stevens, Michael H.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Sheese, Patrick E.] Univ Toronto, Dept Atmospher Phys, Toronto, ON M5S 1A7, Canada.
[Llewellyn, Edward J.] Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada.
[Hervig, Mark E.] GATS Inc, Driggs, ID 83422 USA.
[Niciejewski, Rick] Univ Michigan, Space Phys Res Lab, Ann Arbor, MI 48109 USA.
[Kochenash, Andrew J.] Computat Phys Inc, Springfield, VA 22151 USA.
RP Siskind, DE (reprint author), USN, Res Lab, Div Space Sci, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM david.siskind@nrl.navy.mil
RI Drob, Douglas/G-4061-2014;
OI Drob, Douglas/0000-0002-2045-7740; Stevens, Michael/0000-0003-1082-8955
FU Office of Naval Research; NASA
FX This work was funded by the Office of Naval Research and the NASA
Aeronomy of Ice in the Mesosphere (AIM) project. We thank the National
Center for Atmospheric Research for the use of the TIE-GCM.
NR 17
TC 8
Z9 8
U1 0
U2 18
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD JAN 6
PY 2012
VL 39
AR L01804
DI 10.1029/2011GL050196
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 874BV
UT WOS:000298930900005
ER
PT J
AU Agakishiev, G
Aggarwal, MM
Ahammed, Z
Alakhverdyants, AV
Alekseev, I
Alford, J
Anderson, BD
Anson, CD
Arkhipkin, D
Averichev, GS
Balewski, J
Barnby, LS
Beavis, DR
Bellwied, R
Betancourt, MJ
Betts, RR
Bhasin, A
Bhati, AK
Bichsel, H
Bielcik, J
Bielcikova, J
Bland, LC
Bombara, M
Bordyuzhin, IG
Borowski, W
Bouchet, J
Braidot, E
Brandin, AV
Brovko, SG
Bruna, E
Bueltmann, S
Bunzarov, I
Burton, TP
Cai, XZ
Caines, H
Sanchez, MCD
Cebra, D
Cendejas, R
Cervantes, MC
Chaloupka, P
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Chen, L
Cheng, J
Cherney, M
Chikanian, A
Christie, W
Chung, P
Codrington, MJM
Corliss, R
Cramer, JG
Crawford, HJ
Cui, X
Leyva, AD
De Silva, LC
Debbe, RR
Dedovich, TG
Deng, J
Derevschikov, AA
de Souza, RD
Dhamija, S
Didenko, L
Djawotho, P
Dong, X
Drachenberg, JL
Draper, JE
Du, CM
Dunkelberger, LE
Dunlop, JC
Efimov, LG
Elnimr, M
Engelage, J
Eppley, G
Eun, L
Evdokimov, O
Fatemi, R
Fedorisin, J
Fersch, RG
Filip, P
Finch, E
Fisyak, Y
Gagliardi, CA
Gaillard, L
Gangadharan, DR
Geurts, F
Ghosh, P
Gliske, S
Gorbunov, YN
Grebenyuk, OG
Grosnick, D
Gupta, A
Gupta, S
Guryn, W
Haag, B
Hajkova, O
Hamed, A
Han, LX
Harris, JW
Hays-Wehle, JP
Heppelmann, S
Hirsch, A
Hoffmann, GW
Hofman, DJ
Horvat, S
Huang, B
Huang, HZ
Humanic, TJ
Huo, L
Igo, G
Jacobs, WW
Jena, C
Jones, PG
Joseph, J
Judd, EG
Kabana, S
Kang, K
Kapitan, J
Kauder, K
Ke, HW
Keane, D
Kechechyan, A
Kettler, D
Kikola, DP
Kiryluk, J
Kisiel, A
Kizka, V
Klein, SR
Koetke, DD
Kollegger, T
Konzer, J
Koralt, I
Koroleva, L
Korsch, W
Kotchenda, L
Kravtsov, P
Krueger, K
Kumar, L
Lamont, MAC
Landgraf, JM
LaPointe, S
Lauret, J
Lebedev, A
Lednicky, R
Lee, JH
Leight, W
LeVine, MJ
Li, C
Li, L
Li, W
Li, X
Li, X
Li, Y
Li, ZM
Lima, LM
Lisa, MA
Liu, F
Ljubicic, T
Llope, WJ
Longacre, RS
Lu, Y
Lukashov, EV
Luo, X
Ma, GL
Ma, YG
Mahapatra, DP
Majka, R
Mall, OI
Margetis, S
Markert, C
Masui, H
Matis, HS
McDonald, D
McShane, TS
Minaev, NG
Mioduszewski, S
Mitrovski, MK
Mohammed, Y
Mohanty, B
Mondal, MM
Morozov, B
Morozov, DA
Munhoz, MG
Mustafa, MK
Naglis, M
Nandi, BK
Nattrass, C
Nasim, M
Nayak, TK
Nogach, LV
Nurushev, SB
Odyniec, G
Ogawa, A
Oh, K
Ohlson, A
Okorokov, V
Oldag, EW
Oliveira, RAN
Olson, D
Pachr, M
Page, BS
Pal, SK
Pan
Pandit, Y
Panebratsev, Y
Pawlak, T
Pei, H
Perkins, C
Peryt, W
Pile, P
Planinic, M
Pluta, J
Plyku, D
Poljak, N
Porter, J
Poskanzer, AM
Powell, CB
Prindle, D
Pruneau, C
Pruthi, NK
Pujahari, PR
Putschke, J
Qiu, H
Raniwala, R
Raniwala, S
Ray, RL
Redwine, R
Reed, R
Riley, CK
Ritter, HG
Roberts, JB
Rogachevskiy, OV
Romero, JL
Ruan, L
Rusnak, J
Sahoo, NR
Sakrejda, I
Salur, S
Sandweiss, J
Sangaline, E
Sarkar, A
Schambach, J
Scharenberg, RP
Schmah, AM
Schmitz, N
Schuster, TR
Seele, J
Seger, J
Seyboth, P
Shah, N
Shahaliev, E
Shao, M
Sharma, B
Sharma, M
Shi, SS
Shou, QY
Sichtermann, EP
Singaraju, RN
Skoby, MJ
Smirnov, N
Solanki, D
Sorensen, P
deSouza, UG
Spinka, HM
Srivastava, B
Stanislaus, TDS
Steadman, SG
Stevens, JR
Stock, R
Strikhanov, M
Stringfellow, B
Suaide, AAP
Suarez, MC
Sumbera, M
Sun, XM
Sun, Y
Sun, Z
Surrow, B
Svirida, DN
Symons, TJM
de Toledo, AS
Takahashi, J
Tang, AH
Tang, Z
Tarini, LH
Tarnowsky, T
Thein, D
Thomas, JH
Tian, J
Timmins, AR
Tlusty, D
Tokarev, M
Trentalange, S
Tribble, RE
Tribedy, P
Trzeciak, BA
Tsai, OD
Ullrich, T
Underwood, DG
Van Buren, G
van Nieuwenhuizen, G
Vanfossen, JA
Varma, R
Vasconcelos, GMS
Vasiliev, AN
Videbaek, F
Viyogi, YP
Vokal, S
Voloshin, SA
Vossen, A
Wada, M
Wang, G
Wang, H
Wang, JS
Wang, Q
Wang, XL
Wang, Y
Webb, G
Webb, JC
Westfall, GD
Whitten, C
Wieman, H
Wissink, SW
Witt, R
Witzke, W
Wu, YF
Xiao, Z
Xie, W
Xu, H
Xu, N
Xu, QH
Xu, W
Xu, Y
Xu, Z
Xue, L
Yang, Y
Yang, Y
Yepes, P
Yi, Y
Yip, K
Yoo, IK
Zawisza, M
Zbroszczyk, H
Zhan, W
Zhang, JB
Zhang, S
Zhang, WM
Zhang, XP
Zhang, Y
Zhang, ZP
Zhao, F
Zhao, J
Zhong, C
Zhu, X
Zhu, YH
Zoulkarneeva, Y
AF Agakishiev, G.
Aggarwal, M. M.
Ahammed, Z.
Alakhverdyants, A. V.
Alekseev, I.
Alford, J.
Anderson, B. D.
Anson, C. D.
Arkhipkin, D.
Averichev, G. S.
Balewski, J.
Barnby, L. S.
Beavis, D. R.
Bellwied, R.
Betancourt, M. J.
Betts, R. R.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Bland, L. C.
Bombara, M.
Bordyuzhin, I. G.
Borowski, W.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Brovko, S. G.
Bruna, E.
Bueltmann, S.
Bunzarov, I.
Burton, T. P.
Cai, X. Z.
Caines, H.
Sanchez, M. Calderon de la Barca
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Chen, L.
Cheng, J.
Cherney, M.
Chikanian, A.
Christie, W.
Chung, P.
Codrington, M. J. M.
Corliss, R.
Cramer, J. G.
Crawford, H. J.
Cui, X.
Leyva, A. Davila
De Silva, L. C.
Debbe, R. R.
Dedovich, T. G.
Deng, J.
Derevschikov, A. A.
Derradi de Souza, R.
Dhamija, S.
Didenko, L.
Djawotho, P.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Du, C. M.
Dunkelberger, L. E.
Dunlop, J. C.
Efimov, L. G.
Elnimr, M.
Engelage, J.
Eppley, G.
Eun, L.
Evdokimov, O.
Fatemi, R.
Fedorisin, J.
Fersch, R. G.
Filip, P.
Finch, E.
Fisyak, Y.
Gagliardi, C. A.
Gaillard, L.
Gangadharan, D. R.
Geurts, F.
Ghosh, P.
Gliske, S.
Gorbunov, Y. N.
Grebenyuk, O. G.
Grosnick, D.
Gupta, A.
Gupta, S.
Guryn, W.
Haag, B.
Hajkova, O.
Hamed, A.
Han, L. -X.
Harris, J. W.
Hays-Wehle, J. P.
Heppelmann, S.
Hirsch, A.
Hoffmann, G. W.
Hofman, D. J.
Horvat, S.
Huang, B.
Huang, H. Z.
Humanic, T. J.
Huo, L.
Igo, G.
Jacobs, W. W.
Jena, C.
Jones, P. G.
Joseph, J.
Judd, E. G.
Kabana, S.
Kang, K.
Kapitan, J.
Kauder, K.
Ke, H. W.
Keane, D.
Kechechyan, A.
Kettler, D.
Kikola, D. P.
Kiryluk, J.
Kisiel, A.
Kizka, V.
Klein, S. R.
Koetke, D. D.
Kollegger, T.
Konzer, J.
Koralt, I.
Koroleva, L.
Korsch, W.
Kotchenda, L.
Kravtsov, P.
Krueger, K.
Kumar, L.
Lamont, M. A. C.
Landgraf, J. M.
LaPointe, S.
Lauret, J.
Lebedev, A.
Lednicky, R.
Lee, J. H.
Leight, W.
LeVine, M. J.
Li, C.
Li, L.
Li, W.
Li, X.
Li, X.
Li, Y.
Li, Z. M.
Lima, L. M.
Lisa, M. A.
Liu, F.
Ljubicic, T.
Llope, W. J.
Longacre, R. S.
Lu, Y.
Lukashov, E. V.
Luo, X.
Ma, G. L.
Ma, Y. G.
Mahapatra, D. P.
Majka, R.
Mall, O. I.
Margetis, S.
Markert, C.
Masui, H.
Matis, H. S.
McDonald, D.
McShane, T. S.
Minaev, N. G.
Mioduszewski, S.
Mitrovski, M. K.
Mohammed, Y.
Mohanty, B.
Mondal, M. M.
Morozov, B.
Morozov, D. A.
Munhoz, M. G.
Mustafa, M. K.
Naglis, M.
Nandi, B. K.
Nattrass, C.
Nasim, Md
Nayak, T. K.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Oh, K.
Ohlson, A.
Okorokov, V.
Oldag, E. W.
Oliveira, R. A. N.
Olson, D.
Pachr, M.
Page, B. S.
Pal, S. K.
Pan
Pandit, Y.
Panebratsev, Y.
Pawlak, T.
Pei, H.
Perkins, C.
Peryt, W.
Pile, P.
Planinic, M.
Pluta, J.
Plyku, D.
Poljak, N.
Porter, J.
Poskanzer, A. M.
Powell, C. B.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Pujahari, P. R.
Putschke, J.
Qiu, H.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Redwine, R.
Reed, R.
Riley, C. K.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Ruan, L.
Rusnak, J.
Sahoo, N. R.
Sakrejda, I.
Salur, S.
Sandweiss, J.
Sangaline, E.
Sarkar, A.
Schambach, J.
Scharenberg, R. P.
Schmah, A. M.
Schmitz, N.
Schuster, T. R.
Seele, J.
Seger, J.
Seyboth, P.
Shah, N.
Shahaliev, E.
Shao, M.
Sharma, B.
Sharma, M.
Shi, S. S.
Shou, Q. Y.
Sichtermann, E. P.
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Solanki, D.
Sorensen, P.
deSouza, U. G.
Spinka, H. M.
Srivastava, B.
Stanislaus, T. D. S.
Steadman, S. G.
Stevens, J. R.
Stock, R.
Strikhanov, M.
Stringfellow, B.
Suaide, A. A. P.
Suarez, M. C.
Sumbera, M.
Sun, X. M.
Sun, Y.
Sun, Z.
Surrow, B.
Svirida, D. N.
Symons, T. J. M.
de Toledo, A. Szanto
Takahashi, J.
Tang, A. H.
Tang, Z.
Tarini, L. H.
Tarnowsky, T.
Thein, D.
Thomas, J. H.
Tian, J.
Timmins, A. R.
Tlusty, D.
Tokarev, M.
Trentalange, S.
Tribble, R. E.
Tribedy, P.
Trzeciak, B. A.
Tsai, O. D.
Ullrich, T.
Underwood, D. G.
Van Buren, G.
van Nieuwenhuizen, G.
Vanfossen, J. A., Jr.
Varma, R.
Vasconcelos, G. M. S.
Vasiliev, A. N.
Videbaek, F.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Vossen, A.
Wada, M.
Wang, G.
Wang, H.
Wang, J. S.
Wang, Q.
Wang, X. L.
Wang, Y.
Webb, G.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wissink, S. W.
Witt, R.
Witzke, W.
Wu, Y. F.
Xiao, Z.
Xie, W.
Xu, H.
Xu, N.
Xu, Q. H.
Xu, W.
Xu, Y.
Xu, Z.
Xue, L.
Yang, Y.
Yang, Y.
Yepes, P.
Yi, Y.
Yip, K.
Yoo, I. -K.
Zawisza, M.
Zbroszczyk, H.
Zhan, W.
Zhang, J. B.
Zhang, S.
Zhang, W. M.
Zhang, X. P.
Zhang, Y.
Zhang, Z. P.
Zhao, F.
Zhao, J.
Zhong, C.
Zhu, X.
Zhu, Y. H.
Zoulkarneeva, Y.
CA STAR Collaboration
TI System size and energy dependence of near-side dihadron correlations
SO PHYSICAL REVIEW C
LA English
DT Article
ID TRANSVERSE-MOMENTUM DISTRIBUTIONS; NUCLEAR COLLISIONS; AU+AU COLLISIONS;
D+AU COLLISIONS; SPECTRA; RIDGE; P+P
AB Two-particle azimuthal (Delta phi) and pseudorapidity (Delta eta) correlations using a trigger particle with large transverse momentum (p(T)) in d+Au, Cu+Cu, and Au+Au collisions at root s(NN) = 62.4 GeV and 200 GeV from the STAR experiment at the Relativistic Heavy Ion Collider are presented. The near-side correlation is separated into a jet-like component, narrow in both Delta phi and Delta eta, and the ridge, narrow in Delta phi but broad in Delta eta. Both components are studied as a function of collision centrality, and the jet-like correlation is studied as a function of the trigger and associated p(T). The behavior of the jet-like component is remarkably consistent for different collision systems, suggesting it is produced by fragmentation. The width of the jet-like correlation is found to increase with the system size. The ridge, previously observed in Au+Au collisions at root s(NN) = 200 GeV, is also found in Cu+Cu collisions and in collisions at root s(NN) = 62.4 GeV, but is found to be substantially smaller at root s(NN) = 62.4 GeV than at root s(NN) = 200 GeV for the same average number of participants (< N-part >). Measurements of the ridge are compared to models.
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[Crawford, H. J.; Engelage, J.; Judd, E. G.; Perkins, C.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
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RP Agakishiev, G (reprint author), Joint Inst Nucl Res, Dubna 141980, Russia.
RI Ma, Yu-Gang/M-8122-2013; Strikhanov, Mikhail/P-7393-2014; Xu,
Wenqin/H-7553-2014; XIAO, Zhigang/C-3788-2015; Aparecido Negrao de
Oliveira, Renato/G-9133-2015; Chaloupka, Petr/E-5965-2012; Huang,
Bingchu/H-6343-2015; Nattrass, Christine/J-6752-2016; Derradi de Souza,
Rafael/M-4791-2013; Suaide, Alexandre/L-6239-2016; Svirida,
Dmitry/R-4909-2016; Inst. of Physics, Gleb Wataghin/A-9780-2017;
Okorokov, Vitaly/C-4800-2017; Takahashi, Jun/B-2946-2012; Alekseev,
Igor/J-8070-2014; Sumbera, Michal/O-7497-2014; Planinic,
Mirko/E-8085-2012; Yoo, In-Kwon/J-6222-2012; Witt, Richard/H-3560-2012;
Yip, Kin/D-6860-2013; Xue, Liang/F-8077-2013; Voloshin,
Sergei/I-4122-2013; Lednicky, Richard/K-4164-2013; Yang,
Yanyun/B-9485-2014; Rusnak, Jan/G-8462-2014; Bielcikova,
Jana/G-9342-2014; Barnby, Lee/G-2135-2010
OI Ma, Yu-Gang/0000-0002-0233-9900; Fisyak, Yuri/0000-0002-3151-8377;
Mohanty, Bedangadas/0000-0001-9610-2914; Bhasin,
Anju/0000-0002-3687-8179; Ke, Hongwei/0000-0003-1463-7291; Sorensen,
Paul/0000-0001-5056-9391; Thomas, James/0000-0002-6256-4536; Strikhanov,
Mikhail/0000-0003-2586-0405; Xu, Wenqin/0000-0002-5976-4991; Huang,
Bingchu/0000-0002-3253-3210; Nattrass, Christine/0000-0002-8768-6468;
Derradi de Souza, Rafael/0000-0002-2084-7001; Suaide,
Alexandre/0000-0003-2847-6556; Okorokov, Vitaly/0000-0002-7162-5345;
Takahashi, Jun/0000-0002-4091-1779; Alekseev, Igor/0000-0003-3358-9635;
Sumbera, Michal/0000-0002-0639-7323; Yip, Kin/0000-0002-8576-4311; Xue,
Liang/0000-0002-2321-9019; Yang, Yanyun/0000-0002-5982-1706; Barnby,
Lee/0000-0001-7357-9904
FU RHIC Operations Group; RCF at BNL; NERSC Center at LBNL; Open Science
Grid consortium; Offices of Nuclear Physics and High Energy Physics
within the US DOE Office of Science; US NSF; Sloan Foundation; DFG
cluster of excellence "Origin and Structure of the Universe" of Germany;
CNRS/IN2P3; FAPESP CNPq of Brazil; Ministry of Education and Science of
the Russian Federation; NNSFC, CAS, MoST, and MoE of China; GA and MSMT
of the Czech Republic; FOM and NWO of the Netherlands; DAE, DST, and
CSIR of India; Polish Ministry of Science and Higher Education; Korea
Research Foundation; Ministry of Science, Education and Sports of the
Republic of Croatia; RosAtom of Russia
FX We thank Hannah Petersen, Bjoern Schenke, Derek Teaney, and Li Yan for
useful discussions; the RHIC Operations Group and RCF at BNL; the NERSC
Center at LBNL and the Open Science Grid consortium for providing
resources and support. This work was supported in part by the Offices of
Nuclear Physics and High Energy Physics within the US DOE Office of
Science; the US NSF; the Sloan Foundation; the DFG cluster of excellence
"Origin and Structure of the Universe" of Germany; CNRS/IN2P3; FAPESP
CNPq of Brazil; Ministry of Education and Science of the Russian
Federation; NNSFC, CAS, MoST, and MoE of China; GA and MSMT of the Czech
Republic; FOM and NWO of the Netherlands; DAE, DST, and CSIR of India;
Polish Ministry of Science and Higher Education; Korea Research
Foundation; Ministry of Science, Education and Sports of the Republic of
Croatia; and RosAtom of Russia.
NR 73
TC 12
Z9 12
U1 1
U2 20
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 JAN 6
PY 2012
VL 85
IS 1
AR 014903
DI 10.1103/PhysRevC.85.014903
PG 16
WC Physics, Nuclear
SC Physics
GA 873ZM
UT WOS:000298924800003
ER
PT J
AU Porter, KR
Ewing, D
Chen, L
Wu, SJ
Hayes, CG
Ferrari, M
Teneza-Mora, N
Raviprakash, K
AF Porter, Kevin R.
Ewing, Daniel
Chen, Lan
Wu, Shuenn-Jue
Hayes, Curtis G.
Ferrari, Marilyn
Teneza-Mora, Nimfa
Raviprakash, Kanakatte
TI Immunogenicity and protective efficacy of a vaxfectin-adjuvanted
tetravalent dengue DNA vaccine
SO VACCINE
LA English
DT Article
DE Dengue; DNA vaccine; Vaxfectin
ID PLASMID DNA; NEUTRALIZING ANTIBODY; VIRUS CHALLENGE; GM-CSF; PROTEIN;
MICE; IMMUNIZATION; INCREASES; SEQUENCES; IMMUNITY
AB A prototype dengue-1 DNA vaccine was shown to be safe and immunogenic in a previous Phase 1 clinical trial. Anti-dengue-1 neutralizing antibody responses were detectable only in the group of volunteers receiving the high dose of nonadjuvanted vaccine and the antibody titers were low. Vaxfectin (R), a lipid-based adjuvant, enhances the immunogenicity of DNA vaccines. We conducted a nonhuman primate study to evaluate the effect of vaxfectin (R) on the immunogenicity of a tetravalent dengue DNA vaccine. Animals were immunized on days 0, 28 and 84, with each immunization consisting of 3 mg of Vaxfectin (R)-adjuvanted tetravalent dengue DNA vaccine. The use of Vaxfectin (R) resulted in a significant increase in anti-dengue neutralizing antibody responses against dengue-1, -3 and -4. There was little to no effect on T cell responses as measured by interferon gamma ELISPOT assay. Animals immunized with the Vaxfectin (R)-formulated tetravalent DNA vaccine showed significant protection against live dengue-2 virus challenge compared to control animals (0.75 mean days of viremia vs 3.3 days). Animals vaccinated with nonadjuvanted DNA had a mean 2.0 days of viremia. These results support further evaluation of the Vaxfectin (R)-adjuvanted tetravalent dengue DNA vaccine in a Phase 1 clinical trial. Published by Elsevier Ltd.
C1 [Porter, Kevin R.; Ewing, Daniel; Chen, Lan; Wu, Shuenn-Jue; Hayes, Curtis G.; Teneza-Mora, Nimfa; Raviprakash, Kanakatte] USN, Med Res Ctr, Viral & Rickettsial Dis Dept, Silver Spring, MD USA.
[Ferrari, Marilyn] Vical Inc, San Diego, CA USA.
RP Porter, KR (reprint author), USN, Med Res Ctr, Viral & Rickettsial Dis Dept, Bldg 503,Room 3S04, Silver Spring, MD USA.
EM kevin.porter@med.navy.mil
FU Naval Medical Research Center work unit [62236 N.4127.3696.A0258];
Office of Naval Research
FX This research was supported by Naval Medical Research Center work unit #
62236 N.4127.3696.A0258 and the Agile Vaccine Program, Office of Naval
Research.
NR 27
TC 23
Z9 23
U1 0
U2 6
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0264-410X
J9 VACCINE
JI Vaccine
PD JAN 5
PY 2012
VL 30
IS 2
BP 336
EP 341
DI 10.1016/j.vaccine.2011.10.085
PG 6
WC Immunology; Medicine, Research & Experimental
SC Immunology; Research & Experimental Medicine
GA 887YU
UT WOS:000299971800034
PM 22085548
ER
PT J
AU Ackermann, M
Ajello, M
Allafort, A
Atwood, WB
Baldini, L
Barbiellini, G
Bastieri, D
Bechtol, K
Bellazzini, R
Berenji, B
Blandford, RD
Bloom, ED
Bonamente, E
Borgland, AW
Bouvier, A
Bregeon, J
Brigida, M
Bruel, P
Buehler, R
Buson, S
Caliandro, GA
Cameron, RA
Caraveo, PA
Casandjian, JM
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Charles, E
Chekhtman, A
Cheung, CC
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Claus, R
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Cutini, S
de Angelis, A
de Palma, F
Dermer, CD
Digel, SW
Silva, EDE
Drell, PS
Drlica-Wagner, A
Favuzzi, C
Fegan, SJ
Ferrara, EC
Focke, WB
Fortin, P
Fukazawa, Y
Funk, S
Fusco, P
Gargano, F
Gasparrini, D
Germani, S
Giglietto, N
Giommi, P
Giordano, F
Giroletti, M
Glanzman, T
Godfrey, G
Grenier, IA
Grove, JE
Guiriec, S
Gustafsson, M
Hadasch, D
Harding, AK
Hayashida, M
Hughes, RE
Johannesson, G
Johnson, AS
Kamae, T
Katagiri, H
Kataoka, J
Knodlseder, J
Kuss, M
Lande, J
Latronico, L
Lemoine-Goumard, M
Garde, ML
Longo, F
Loparco, F
Lovellette, MN
Lubrano, P
Madejski, GM
Mazziotta, MN
McEnery, JE
Michelson, PF
Mitthumsiri, W
Mizuno, T
Moiseev, AA
Monte, C
Monzani, ME
Morselli, A
Moskalenko, IV
Murgia, S
Nakamori, T
Nolan, PL
Norris, JP
Nuss, E
Ohno, M
Ohsugi, T
Okumura, A
Omodei, N
Orlando, E
Ormes, JF
Ozaki, M
Paneque, D
Parent, D
Pesce-Rollins, M
Pierbattista, M
Piron, F
Pivato, G
Porter, TA
Raino, S
Rando, R
Razzano, M
Razzaque, S
Reimer, A
Reimer, O
Reposeur, T
Ritz, S
Romani, RW
Roth, M
Sadrozinski, HFW
Sbarra, C
Schalk, TL
Sgro, C
Siskind, EJ
Spandre, G
Spinelli, P
Strong, AW
Takahashi, H
Takahashi, T
Tanaka, T
Thayer, JG
Thayer, JB
Tibaldo, L
Tinivella, M
Torres, DF
Tosti, G
Troja, E
Uchiyama, Y
Usher, TL
Vandenbroucke, J
Vasileiou, V
Vianello, G
Vitale, V
Waite, AP
Winer, BL
Wood, KS
Wood, M
Yang, Z
Zimmer, S
AF Ackermann, M.
Ajello, M.
Allafort, A.
Atwood, W. B.
Baldini, L.
Barbiellini, G.
Bastieri, D.
Bechtol, K.
Bellazzini, R.
Berenji, B.
Blandford, R. D.
Bloom, E. D.
Bonamente, E.
Borgland, A. W.
Bouvier, A.
Bregeon, J.
Brigida, M.
Bruel, P.
Buehler, R.
Buson, S.
Caliandro, G. A.
Cameron, R. A.
Caraveo, P. A.
Casandjian, J. M.
Cecchi, C.
Charles, E.
Chekhtman, A.
Cheung, C. C.
Chiang, J.
Ciprini, S.
Claus, R.
Cohen-Tanugi, J.
Conrad, J.
Cutini, S.
de Angelis, A.
de Palma, F.
Dermer, C. D.
Digel, S. W.
do Couto e Silva, E.
Drell, P. S.
Drlica-Wagner, A.
Favuzzi, C.
Fegan, S. J.
Ferrara, E. C.
Focke, W. B.
Fortin, P.
Fukazawa, Y.
Funk, S.
Fusco, P.
Gargano, F.
Gasparrini, D.
Germani, S.
Giglietto, N.
Giommi, P.
Giordano, F.
Giroletti, M.
Glanzman, T.
Godfrey, G.
Grenier, I. A.
Grove, J. E.
Guiriec, S.
Gustafsson, M.
Hadasch, D.
Harding, A. K.
Hayashida, M.
Hughes, R. E.
Johannesson, G.
Johnson, A. S.
Kamae, T.
Katagiri, H.
Kataoka, J.
Knoedlseder, J.
Kuss, M.
Lande, J.
Latronico, L.
Lemoine-Goumard, M.
Garde, M. Llena
Longo, F.
Loparco, F.
Lovellette, M. N.
Lubrano, P.
Madejski, G. M.
Mazziotta, M. N.
McEnery, J. E.
Michelson, P. F.
Mitthumsiri, W.
Mizuno, T.
Moiseev, A. A.
Monte, C.
Monzani, M. E.
Morselli, A.
Moskalenko, I. V.
Murgia, S.
Nakamori, T.
Nolan, P. L.
Norris, J. P.
Nuss, E.
Ohno, M.
Ohsugi, T.
Okumura, A.
Omodei, N.
Orlando, E.
Ormes, J. F.
Ozaki, M.
Paneque, D.
Parent, D.
Pesce-Rollins, M.
Pierbattista, M.
Piron, F.
Pivato, G.
Porter, T. A.
Raino, S.
Rando, R.
Razzano, M.
Razzaque, S.
Reimer, A.
Reimer, O.
Reposeur, T.
Ritz, S.
Romani, R. W.
Roth, M.
Sadrozinski, H. F. -W.
Sbarra, C.
Schalk, T. L.
Sgro, C.
Siskind, E. J.
Spandre, G.
Spinelli, P.
Strong, A. W.
Takahashi, H.
Takahashi, T.
Tanaka, T.
Thayer, J. G.
Thayer, J. B.
Tibaldo, L.
Tinivella, M.
Torres, D. F.
Tosti, G.
Troja, E.
Uchiyama, Y.
Usher, T. L.
Vandenbroucke, J.
Vasileiou, V.
Vianello, G.
Vitale, V.
Waite, A. P.
Winer, B. L.
Wood, K. S.
Wood, M.
Yang, Z.
Zimmer, S.
CA Fermi LAT Collaboration
TI Measurement of Separate Cosmic-Ray Electron and Positron Spectra with
the Fermi Large Area Telescope
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID RADIATION; ENERGIES; RATIO; SPECTROMETER; ASYMMETRY; COMPONENT;
FRACTION; FLIGHT
AB We measured separate cosmic-ray electron and positron spectra with the Fermi Large Area Telescope. Because the instrument does not have an onboard magnet, we distinguish the two species by exploiting Earth's shadow, which is offset in opposite directions for opposite charges due to Earth's magnetic field. We estimate and subtract the cosmic-ray proton background using two different methods that produce consistent results. We report the electron-only spectrum, the positron-only spectrum, and the positron fraction between 20 and 200 GeV. We confirm that the fraction rises with energy in the 20-100 GeV range. The three new spectral points between 100 and 200 GeVare consistent with a fraction that is continuing to rise with energy.
C1 [Ackermann, M.] Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany.
[Ajello, M.; Allafort, A.; Bechtol, K.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Digel, S. W.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Focke, W. B.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Johnson, A. S.; Kamae, T.; Lande, J.; Madejski, G. M.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Nolan, P. L.; Okumura, A.; Omodei, N.; Orlando, E.; Paneque, D.; Porter, T. A.; Reimer, A.; Reimer, O.; Romani, R. W.; Tanaka, T.; Thayer, J. G.; Thayer, J. B.; Uchiyama, Y.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wood, M.] Stanford Univ, Dept Phys, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA.
[Ajello, M.; Allafort, A.; Bechtol, K.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Digel, S. W.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Focke, W. B.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Johnson, A. S.; Kamae, T.; Lande, J.; Madejski, G. M.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Nolan, P. L.; Okumura, A.; Omodei, N.; Orlando, E.; Paneque, D.; Porter, T. A.; Reimer, A.; Reimer, O.; Romani, R. W.; Tanaka, T.; Thayer, J. G.; Thayer, J. B.; Uchiyama, Y.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wood, M.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
[Atwood, W. B.; Bouvier, A.; Razzano, M.; Ritz, S.; Sadrozinski, H. F. -W.; Schalk, T. L.] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA.
[Atwood, W. B.; Bouvier, A.; Razzano, M.; Ritz, S.; Sadrozinski, H. F. -W.; Schalk, T. L.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
[Baldini, L.; Bellazzini, R.; Bregeon, J.; Kuss, M.; Pesce-Rollins, M.; Razzano, M.; Sgro, C.; Spandre, G.; Tinivella, M.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
[Barbiellini, G.; Longo, F.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
[Barbiellini, G.; Longo, F.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
[Bastieri, D.; Buson, S.; Gustafsson, M.; Rando, R.; Sbarra, C.; Tibaldo, L.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
[Bastieri, D.; Buson, S.; Pivato, G.; Rando, R.; Tibaldo, L.] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
[Bonamente, E.; Cecchi, C.; Germani, S.; Lubrano, P.; Tosti, G.] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy.
[Bonamente, E.; Cecchi, C.; Ciprini, S.; Germani, S.; Lubrano, P.; Tosti, G.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Univ Politecn Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
[Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Gargano, F.; Giglietto, N.; Giordano, F.; Loparco, F.; Mazziotta, M. N.; Monte, C.; Raino, S.; Spinelli, P.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
[Bruel, P.; Fegan, S. J.; Fortin, P.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
[Caliandro, G. A.; Hadasch, D.; Torres, D. F.] Inst Ciencies Espai IEEE CSIC, Barcelona 08193, Spain.
[Caraveo, P. A.] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy.
[Casandjian, J. M.; Grenier, I. A.; Pierbattista, M.] Univ Paris Diderot, CNRS, IRFU, CEA,Lab AIM,Serv Astrophys,CEA Saclay, F-91191 Gif Sur Yvette, France.
[Chekhtman, A.] Artep Inc, Ellicott City, MD 21042 USA.
[Cheung, C. C.] Natl Acad Sci, Natl Res Council Res Associate, Washington, DC 20001 USA.
[Ciprini, S.] ASI Sci Data Ctr, I-00044 Frascati, Roma, Italy.
[Cohen-Tanugi, J.; Nuss, E.; Piron, F.; Vasileiou, V.] Univ Montpellier 2, Lab Univers & Particules Montpellier, CNRS, IN2P3, Montpellier, France.
[Conrad, J.; Garde, M. Llena; Yang, Z.; Zimmer, S.] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden.
[Conrad, J.; Garde, M. Llena; Yang, Z.; Zimmer, S.] Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.
[Cutini, S.; Gasparrini, D.; Giommi, P.] Agenzia Spaziale Italiana ASI Sci Data Ctr, I-00044 Frascati, Roma, Italy.
[de Angelis, A.] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy.
[de Angelis, A.] Ist Nazl Fis Nucl, Sez Trieste, Grp Collegato Udine, I-33100 Udine, Italy.
[Dermer, C. D.; Grove, J. E.; Lovellette, M. N.; Wood, K. S.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Ferrara, E. C.; Harding, A. K.; McEnery, J. E.; Moiseev, A. A.; Troja, E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
[Fukazawa, Y.; Mizuno, T.] Hiroshima Univ, Dept Phys Sci, Higashihiroshima, Hiroshima 7398526, Japan.
[Giroletti, M.; Lemoine-Goumard, M.] INAF Ist Radioastron, I-40129 Bologna, Italy.
[Guiriec, S.] Univ Alabama, CSPAR, Huntsville, AL 35899 USA.
[Hayashida, M.] Kyoto Univ, Grad Sch Sci, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan.
[Hughes, R. E.; Winer, B. L.] Ohio State Univ, Dept Phys, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA.
[Johannesson, G.] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland.
[Katagiri, H.] Ibaraki Univ, Coll Sci, Mito, Ibaraki 3108512, Japan.
[Kataoka, J.; Nakamori, T.] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan.
[Knoedlseder, J.] IRAP, CNRS, F-31028 Toulouse 4, France.
[Knoedlseder, J.] Univ Toulouse, GAHEC, UPS, OMP,IRAP, Toulouse, France.
[Latronico, L.] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
[Lemoine-Goumard, M.; Reposeur, T.] Univ Bordeaux 1, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France.
[McEnery, J. E.; Moiseev, A. A.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
[McEnery, J. E.; Moiseev, A. A.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
[Moiseev, A. A.] CRESST, Greenbelt, MD 20771 USA.
[Morselli, A.; Vitale, V.] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.
[Norris, J. P.] Boise State Univ, Dept Phys, Boise, ID 83725 USA.
[Ohno, M.; Okumura, A.; Ozaki, M.; Takahashi, T.] JAXA, Inst Space & Astronaut Sci, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan.
[Ohsugi, T.; Takahashi, H.] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Higashihiroshima, Hiroshima 7398526, Japan.
[Orlando, E.; Strong, A. W.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
[Ormes, J. F.] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA.
[Paneque, D.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Parent, D.; Razzaque, S.] George Mason Univ, Ctr Earth Observing & Space Res, Coll Sci, Fairfax, VA 22030 USA.
[Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria.
[Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria.
[Roth, M.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
[Siskind, E. J.] NYCB Real Time Comp Inc, Lattingtown, NY 11560 USA.
[Torres, D. F.] ICREA, Barcelona, Spain.
[Vianello, G.] CIFS, I-10133 Turin, Italy.
[Vitale, V.] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
RP Ackermann, M (reprint author), Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany.
EM markus.ackermann@desy.de; funk@slac.stanford.edu;
warit@slac.stanford.edu; carmelo.sgro@pi.infn.it; justinv@stanford.edu
RI Harding, Alice/D-3160-2012; McEnery, Julie/D-6612-2012; lubrano,
pasquale/F-7269-2012; Baldini, Luca/E-5396-2012; Morselli,
Aldo/G-6769-2011; Ozaki, Masanobu/K-1165-2013; Kuss,
Michael/H-8959-2012; giglietto, nicola/I-8951-2012; Reimer,
Olaf/A-3117-2013; Tosti, Gino/E-9976-2013; Rando, Riccardo/M-7179-2013;
Funk, Stefan/B-7629-2015; Loparco, Francesco/O-8847-2015; Johannesson,
Gudlaugur/O-8741-2015; Gargano, Fabio/O-8934-2015; Moskalenko,
Igor/A-1301-2007; Mazziotta, Mario /O-8867-2015; Sgro,
Carmelo/K-3395-2016; Torres, Diego/O-9422-2016; Orlando, E/R-5594-2016;
OI lubrano, pasquale/0000-0003-0221-4806; Morselli,
Aldo/0000-0002-7704-9553; giglietto, nicola/0000-0002-9021-2888; Reimer,
Olaf/0000-0001-6953-1385; Funk, Stefan/0000-0002-2012-0080; Loparco,
Francesco/0000-0002-1173-5673; Johannesson,
Gudlaugur/0000-0003-1458-7036; Gargano, Fabio/0000-0002-5055-6395;
Moskalenko, Igor/0000-0001-6141-458X; Mazziotta, Mario
/0000-0001-9325-4672; Torres, Diego/0000-0002-1522-9065; Giordano,
Francesco/0000-0002-8651-2394; giommi, paolo/0000-0002-2265-5003; De
Angelis, Alessandro/0000-0002-3288-2517; Caraveo,
Patrizia/0000-0003-2478-8018; Sgro', Carmelo/0000-0001-5676-6214;
SPINELLI, Paolo/0000-0001-6688-8864; Rando,
Riccardo/0000-0001-6992-818X; Zimmer, Stephan/0000-0002-5735-0082;
Bastieri, Denis/0000-0002-6954-8862; Omodei, Nicola/0000-0002-5448-7577;
Pesce-Rollins, Melissa/0000-0003-1790-8018; Giroletti,
Marcello/0000-0002-8657-8852; Cutini, Sara/0000-0002-1271-2924; Berenji,
Bijan/0000-0002-4551-772X; Gasparrini, Dario/0000-0002-5064-9495;
Baldini, Luca/0000-0002-9785-7726
FU European Community [ERC-StG-259391]; K. A. Wallenberg Foundation
FX The Fermi LAT Collaboration acknowledges support from a number of
agencies and institutes for both development and the operation of the
LAT as well as scientific data analysis. These include NASA and DOE in
the United States, CEA/Irfu and IN2P3/CNRS in France, ASI and INFN in
Italy, MEXT, KEK, and JAXA in Japan, and the K. A. Wallenberg
Foundation, the Swedish Research Council and the National Space Board in
Sweden. Additional support from INAF in Italy and CNES in France for
science analysis during the operations phase is also gratefully
acknowledged. M. Lemoine-Goumard is funded by contract ERC-StG-259391
from the European Community. J. Conrad is a Royal Swedish Academy of
Sciences Research Fellow, funded by a grant from the K. A. Wallenberg
Foundation. E. Troja is a NASA Postdoctoral Program Fellow.
NR 39
TC 277
Z9 281
U1 10
U2 31
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JAN 5
PY 2012
VL 108
IS 1
AR 011103
DI 10.1103/PhysRevLett.108.011103
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 874AX
UT WOS:000298928500005
PM 22304252
ER
PT J
AU Wojnarowska, Z
Roland, CM
Swiety-Pospiech, A
Grzybowska, K
Paluch, M
AF Wojnarowska, Z.
Roland, C. M.
Swiety-Pospiech, A.
Grzybowska, K.
Paluch, M.
TI Anomalous Electrical Conductivity Behavior at Elevated Pressure in the
Protic Ionic Liquid Procainamide Hydrochloride
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID STRUCTURAL RELAXATION; DC CONDUCTIVITY; TIME; TEMPERATURE; TRANSPORT;
POLYMERS; CRYSTALLIZATION; DYNAMICS; KINETICS; MODULUS
AB Using broadband dielectric spectroscopy, we investigated the effect of hydrostatic pressure on the conductivity relaxation time tau(sigma) of the supercooled protic ionic liquid, procainamide hydrochloride, a common pharmaceutical. The pressure dependence of tau(sigma) exhibited anomalous behavior in the vicinity of the glass transition T(g), manifested by abrupt changes in activation volume. This peculiar behavior, paralleling the change in temperature dependence of tau(sigma) near T(g), is a manifestation of the decoupling between electrical conductivity and structural relaxation. Although the latter effectively ceases in the glassy state, free ions retain their mobility but with a reduced sensitivity to thermodynamic changes. This is the first observation of decoupling of ion migration from structural relaxation in a glassy conductor by isothermal densification.
C1 [Wojnarowska, Z.; Swiety-Pospiech, A.; Grzybowska, K.; Paluch, M.] Silesian Univ, Inst Phys, PL-40007 Katowice, Poland.
[Roland, C. M.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
RP Wojnarowska, Z (reprint author), Silesian Univ, Inst Phys, Ul Uniwersytecka 4, PL-40007 Katowice, Poland.
FU Office of Naval Research; Polish State of Committee for Scientific
Research [N N202 023440]
FX The work at NRL was supported by the Office of Naval Research. The
support of the Polish State of Committee for Scientific Research (Grant
No. N N202 023440) is gratefully acknowledged.
NR 30
TC 37
Z9 37
U1 2
U2 22
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD JAN 5
PY 2012
VL 108
IS 1
AR 015701
DI 10.1103/PhysRevLett.108.015701
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 874AX
UT WOS:000298928500011
PM 22304270
ER
PT J
AU Choisne, J
Ringleb, SI
Sarnaan, MA
Bawab, SY
Naik, D
Anderson, CD
AF Choisne, Julie
Ringleb, Stacie I.
Sarnaan, Michael A.
Bawab, Sebastian Y.
Naik, Dayanand
Anderson, Claude D.
TI Influence of kinematic analysis methods on detecting ankle and subtalar
joint instability
SO JOURNAL OF BIOMECHANICS
LA English
DT Article
DE Subtalar joint instability; Kinematics; Euler angles; Joint coordinate
system; Helical axis
ID PASSIVE MOTION CHARACTERISTICS; LATERAL COLLATERAL LIGAMENTS; IN-VIVO;
FLEXIBILITY CHARACTERISTICS; 3-DIMENSIONAL KINEMATICS;
COMPUTED-TOMOGRAPHY; TALOCALCANEAL JOINT; ISB RECOMMENDATION; COORDINATE
SYSTEM; STRESS MRI
AB Patients with subtalar joint instability may be misdiagnosed with ankle instability, which may lead to chronic instability at the subtalar joint. Therefore, it is important to understand the difference in kinematics after ligament sectioning and differentiate the changes in kinematics between ankle and subtalar instability. Three methods may be used to determine the joint kinematics; the Euler angles, the Joint Coordinate System (JCS) and the helical axis (HA). The purpose of this study was to investigate the influence of using either method to detect subtalar and ankle joints instability. 3D kinematics at the ankle and subtalar joint were analyzed on 8 cadaveric specimens while the foot was intact and after sequentially sectioning the anterior talofibular ligament (ATFL), the calcaneofibular ligament (CFL), the cervical ligament and the interosseous talocalcaneal ligament (ITCL). Comparison in kinematics calculated from sensor and anatomical landmarks was conducted as well as the influence of Euler angles and JCS rotation sequence (between ISB recommendation and previous research) on the subtalar joint. All data showed a significant increase in inversion when the ITCL was sectioned. There were differences in the data calculated using sensors coordinate systems vs. anatomic coordinate systems. Anatomic coordinate systems were recommended for these calculations. The Euler angle and JCS gave similar results. Differences in Euler angles and JCS sequence lead to the same conclusion in detecting instability at the ankle and subtalar joint. As expected, the HA detected instability in plantarflexion at the ankle joint and in inversion at the subtalar joint. (C) 2011 Elsevier Ltd. All rights reserved.
C1 [Ringleb, Stacie I.] Old Dominion Univ, Dept Mech & Aerosp Engn, Norfolk, VA 23529 USA.
[Ringleb, Stacie I.] Old Dominion Univ, Virginia Modeling Anal & Simulat Ctr, Norfolk, VA 23529 USA.
[Anderson, Claude D.] USN, Med Ctr, Portsmouth, VA USA.
RP Ringleb, SI (reprint author), Old Dominion Univ, Dept Mech & Aerosp Engn, 238C Kaufman Hall, Norfolk, VA 23529 USA.
EM Sringleb@odu.edu
FU American Orthopaedic Foot and Ankle Society
FX This research was partially funded by the American Orthopaedic Foot and
Ankle Society.
NR 43
TC 7
Z9 8
U1 0
U2 9
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0021-9290
J9 J BIOMECH
JI J. Biomech.
PD JAN 3
PY 2012
VL 45
IS 1
BP 46
EP 52
DI 10.1016/j.jbiomech.2011.10.015
PG 7
WC Biophysics; Engineering, Biomedical
SC Biophysics; Engineering
GA 880ZG
UT WOS:000299448500006
PM 22056198
ER
PT J
AU Velikovich, AL
Huete, C
Wouchuk, JG
AF Velikovich, A. L.
Huete, C.
Wouchuk, J. G.
TI Effect of shock-generated turbulence on the Hugoniot jump conditions
SO PHYSICAL REVIEW E
LA English
DT Article
ID FUSION; PROPAGATION; FLUIDS; WAVE
AB Interaction of a shock wave with preshock random density nonuniformities is known to generate turbulence in the postshock flow. The turbulent motion, in turn, modifies the shock jump conditions. As first detected in the simulations by Hazak et al. [Phys. Plasmas 5, 4357 (1998)], shock compression of a deuterium-filled foam is less than that predicted for a uniform medium of the same average density. Exact analytical small-amplitude theory of this shock undercompression effect is reported, and explicit formulas for the turbulent corrections to the strong-shock Hugoniot jump conditions are presented.
C1 [Velikovich, A. L.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Huete, C.; Wouchuk, J. G.] Univ Castilla La Mancha, ETSII, Inst Invest Energet INEI, E-13071 Ciudad Real, Spain.
RP Velikovich, AL (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RI Huete, Cesar/A-3184-2012; Wouchuk, J. G./F-1449-2016
OI Huete, Cesar/0000-0002-3227-8520;
FU US DOE/NNSA; Ministry of Science; MEC [FIS2006-05389]; Junta de CLM,
Spain [PAI08-0182-3162]
FX The authors are grateful to G. Hazak, V.N. Goncharov, and I.V.
Igumenshchev for stimulating discussions. This paper was supported by
the US DOE/NNSA (A.L.V.) and by the Ministry of Science, MEC (Grant No.
FIS2006-05389) and Junta de CLM (Grant No. PAI08-0182-3162) Spain
(J.G.W. and C.H.)
NR 30
TC 7
Z9 7
U1 1
U2 9
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 JAN 3
PY 2012
VL 85
IS 1
AR 016301
DI 10.1103/PhysRevE.85.016301
PN 2
PG 12
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 876QZ
UT WOS:000299124000003
PM 22400652
ER
PT J
AU Agakishiev, G
Aggarwal, MM
Ahammed, Z
Alakhverdyants, AV
Alekseev, I
Alford, J
Anderson, BD
Anson, CD
Arkhipkin, D
Averichev, GS
Balewski, J
Beavis, DR
Behera, NK
Bellwied, R
Betancourt, MJ
Betts, RR
Bhasin, A
Bhati, AK
Bichsel, H
Bielcik, J
Bielcikova, J
Bland, LC
Bordyuzhin, IG
Borowski, W
Bouchet, J
Braidot, E
Brandin, AV
Bridgeman, A
Brovko, SG
Bruna, E
Bueltmann, S
Bunzarov, I
Burton, TP
Cai, XZ
Caines, H
Sanchez, MCD
Cebra, D
Cendejas, R
Cervantes, MC
Chaloupka, P
Chattopadhyay, S
Chen, HF
Chen, JH
Chen, JY
Chen, L
Cheng, J
Cherney, M
Chikanian, A
Choi, KE
Christie, W
Chung, P
Codrington, MJM
Corliss, R
Cramer, JG
Crawford, HJ
Cui
Leyva, AD
De Silva, LC
Debbe, RR
Dedovich, TG
Deng, J
Derevschikov, AA
de Souza, RD
Didenko, L
Djawotho, P
Dogra, SM
Dong, X
Drachenberg, JL
Draper, JE
Du, CM
Dunlop, JC
Efimov, LG
Elnimr, M
Engelage, J
Eppley, G
Estienne, M
Eun, L
Evdokimov, O
Fatemi, R
Fedorisin, J
Fersch, RG
Filip, P
Finch, E
Fine, V
Fisyak, Y
Gagliardi, CA
Gangadharan, DR
Geurts, F
Ghosh, P
Gorbunov, YN
Gordon, A
Grebenyuk, OG
Grosnick, D
Gupta, A
Gupta, S
Guryn, W
Haag, B
Hajkova, O
Hamed, A
Han, LX
Harris, JW
Hays-Wehle, JP
Heinz, M
Heppelmann, S
Hirsch, A
Hjort, E
Hoffmann, GW
Hofman, DJ
Huang, B
Huang, HZ
Humanic, TJ
Huo, L
Igo, G
Jacobs, P
Jacobs, WW
Jena, C
Jin, F
Joseph, J
Judd, EG
Kabana, S
Kang, K
Kapitan, J
Kauder, K
Ke, HW
Keane, D
Kechechyan, A
Kettler, D
Kikola, DP
Kiryluk, J
Kisiel, A
Kizka, V
Klein, SR
Knospe, AG
Koetke, DD
Kollegger, T
Konzer, J
Koralt, I
Koroleva, L
Korsch, W
Kotchenda, L
Kouchpil, V
Kravtsov, P
Krueger, K
Krus, M
Kumar, L
Lamont, MAC
Landgraf, JM
LaPointe, S
Lauret, J
Lebedev, A
Lednicky, R
Lee, JH
Leight, W
LeVine, MJ
Li, C
Li, L
Li, N
Li, W
Li, X
Li, X
Li, Y
Li, ZM
Lima, LM
Lisa, MA
Liu, F
Liu, H
Liu, J
Ljubicic, T
Llope, WJ
Longacre, RS
Lu, Y
Lukashov, EV
Luo, X
Ma, GL
Ma, YG
Mahapatra, DP
Majka, R
Mall, OI
Manweiler, R
Margetis, S
Markert, C
Masui, H
Matis, HS
McDonald, D
McShane, TS
Meschanin, A
Milner, R
Minaev, NG
Mioduszewski, S
Mitrovski, MK
Mohammed, Y
Mohanty, B
Mondal, MM
Morozov, B
Morozov, DA
Munhoz, MG
Mustafa, MK
Naglis, M
Nandi, BK
Nayak, TK
Nogach, LV
Nurushev, SB
Odyniec, G
Ogawa, A
Oh, K
Ohlson, A
Okorokov, V
Oldag, EW
Oliveira, RAN
Olson, D
Pachr, M
Page, BS
Pal, SK
Pandit, Y
Panebratsev, Y
Pawlak, T
Pei, H
Peitzmann, T
Perkins, C
Peryt, W
Pile, P
Planinic, M
Ploskon, MA
Pluta, J
Plyku, D
Poljak, N
Porter, J
Poskanzer, AM
Potukuchi, BVKS
Powell, CB
Prindle, D
Pruneau, C
Pruthi, NK
Pujahari, PR
Putschke, J
Qiu, H
Raniwala, R
Raniwala, S
Ray, RL
Redwine, R
Reed, R
Ritter, HG
Roberts, JB
Rogachevskiy, OV
Romero, JL
Ruan, L
Rusnak, J
Sahoo, NR
Sakrejda, I
Salur, S
Sandweiss, J
Sangaline, E
Sarkar, A
Schambach, J
Scharenberg, RP
Schaub, J
Schmah, AM
Schmitz, N
Schuster, TR
Seele, J
Seger, J
Selyuzhenkov, I
Seyboth, P
Shah, N
Shahaliev, E
Shao, M
Sharma, M
Shi, SS
Shou, QY
Sichtermann, EP
Simon, F
Singaraju, RN
Skoby, MJ
Smirnov, N
Solanki, D
Sorensen, P
deSouza, UG
Spinka, HM
Srivastava, B
Stanislaus, TDS
Steadman, SG
Stevens, JR
Stock, R
Strikhanov, M
Stringfellow, B
Suaide, AAP
Suarez, MC
Subba, NL
Sumbera, M
Sun, XM
Sun, Y
Sun, Z
Surrow, B
Svirida, DN
Symons, TJM
de Toledo, AS
Takahashi, J
Tang, AH
Tang, Z
Tarini, LH
Tarnowsky, T
Thein, D
Thomas, JH
Tian, J
Timmins, AR
Tlusty, D
Tokarev, M
Trentalange, S
Tribble, RE
Tribedy, P
Trzeciak, BA
Tsai, OD
Ullrich, T
Underwood, DG
Van Buren, G
van Nieuwenhuizen, G
Vanfossen, JA
Varma, R
Vasconcelos, GMS
Vasiliev, AN
Videbk, F
Viyogi, YP
Vokal, S
Voloshin, SA
Wada, M
Walker, M
Wang, F
Wang, G
Wang, H
Wang, JS
Wang, Q
Wang, XL
Wang, Y
Webb, G
Webb, JC
Westfall, GD
Whitten, C
Wieman, H
Wissink, SW
Witt, R
Witzke, W
Wu, YF
Xiao, Z
Xie, W
Xu, H
Xu, N
Xu, QH
Xu, W
Xu, Y
Xu, Z
Xue, L
Yang, Y
Yang, Y
Yepes, P
Yip, K
Yoo, IK
Zawisza, M
Zbroszczyk, H
Zhan, W
Zhang, JB
Zhang, S
Zhang, WM
Zhang, XP
Zhang, Y
Zhang, ZP
Zhao, F
Zhao, J
Zhong, C
Zhu, X
Zhu, YH
Zoulkarneeva, Y
AF Agakishiev, G.
Aggarwal, M. M.
Ahammed, Z.
Alakhverdyants, A. V.
Alekseev, I.
Alford, J.
Anderson, B. D.
Anson, C. D.
Arkhipkin, D.
Averichev, G. S.
Balewski, J.
Beavis, D. R.
Behera, N. K.
Bellwied, R.
Betancourt, M. J.
Betts, R. R.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Bland, L. C.
Bordyuzhin, I. G.
Borowski, W.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Bridgeman, A.
Brovko, S. G.
Bruna, E.
Bueltmann, S.
Bunzarov, I.
Burton, T. P.
Cai, X. Z.
Caines, H.
Sanchez, M. Calderon de la Barca
Cebra, D.
Cendejas, R.
Cervantes, M. C.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Chen, L.
Cheng, J.
Cherney, M.
Chikanian, A.
Choi, K. E.
Christie, W.
Chung, P.
Codrington, M. J. M.
Corliss, R.
Cramer, J. G.
Crawford, H. J.
Cui
Leyva, A. Davila
De Silva, L. C.
Debbe, R. R.
Dedovich, T. G.
Deng, J.
Derevschikov, A. A.
Derradi de Souza, R.
Didenko, L.
Djawotho, P.
Dogra, S. M.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Du, C. M.
Dunlop, J. C.
Efimov, L. G.
Elnimr, M.
Engelage, J.
Eppley, G.
Estienne, M.
Eun, L.
Evdokimov, O.
Fatemi, R.
Fedorisin, J.
Fersch, R. G.
Filip, P.
Finch, E.
Fine, V.
Fisyak, Y.
Gagliardi, C. A.
Gangadharan, D. R.
Geurts, F.
Ghosh, P.
Gorbunov, Y. N.
Gordon, A.
Grebenyuk, O. G.
Grosnick, D.
Gupta, A.
Gupta, S.
Guryn, W.
Haag, B.
Hajkova, O.
Hamed, A.
Han, L. -X.
Harris, J. W.
Hays-Wehle, J. P.
Heinz, M.
Heppelmann, S.
Hirsch, A.
Hjort, E.
Hoffmann, G. W.
Hofman, D. J.
Huang, B.
Huang, H. Z.
Humanic, T. J.
Huo, L.
Igo, G.
Jacobs, P.
Jacobs, W. W.
Jena, C.
Jin, F.
Joseph, J.
Judd, E. G.
Kabana, S.
Kang, K.
Kapitan, J.
Kauder, K.
Ke, H. W.
Keane, D.
Kechechyan, A.
Kettler, D.
Kikola, D. P.
Kiryluk, J.
Kisiel, A.
Kizka, V.
Klein, S. R.
Knospe, A. G.
Koetke, D. D.
Kollegger, T.
Konzer, J.
Koralt, I.
Koroleva, L.
Korsch, W.
Kotchenda, L.
Kouchpil, V.
Kravtsov, P.
Krueger, K.
Krus, M.
Kumar, L.
Lamont, M. A. C.
Landgraf, J. M.
LaPointe, S.
Lauret, J.
Lebedev, A.
Lednicky, R.
Lee, J. H.
Leight, W.
LeVine, M. J.
Li, C.
Li, L.
Li, N.
Li, W.
Li, X.
Li, X.
Li, Y.
Li, Z. M.
Lima, L. M.
Lisa, M. A.
Liu, F.
Liu, H.
Liu, J.
Ljubicic, T.
Llope, W. J.
Longacre, R. S.
Lu, Y.
Lukashov, E. V.
Luo, X.
Ma, G. L.
Ma, Y. G.
Mahapatra, D. P.
Majka, R.
Mall, O. I.
Manweiler, R.
Margetis, S.
Markert, C.
Masui, H.
Matis, H. S.
McDonald, D.
McShane, T. S.
Meschanin, A.
Milner, R.
Minaev, N. G.
Mioduszewski, S.
Mitrovski, M. K.
Mohammed, Y.
Mohanty, B.
Mondal, M. M.
Morozov, B.
Morozov, D. A.
Munhoz, M. G.
Mustafa, M. K.
Naglis, M.
Nandi, B. K.
Nayak, T. K.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Oh, K.
Ohlson, A.
Okorokov, V.
Oldag, E. W.
Oliveira, R. A. N.
Olson, D.
Pachr, M.
Page, B. S.
Pal, S. K.
Pandit, Y.
Panebratsev, Y.
Pawlak, T.
Pei, H.
Peitzmann, T.
Perkins, C.
Peryt, W.
Pile, P.
Planinic, M.
Ploskon, M. A.
Pluta, J.
Plyku, D.
Poljak, N.
Porter, J.
Poskanzer, A. M.
Potukuchi, B. V. K. S.
Powell, C. B.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Pujahari, P. R.
Putschke, J.
Qiu, H.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Redwine, R.
Reed, R.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Ruan, L.
Rusnak, J.
Sahoo, N. R.
Sakrejda, I.
Salur, S.
Sandweiss, J.
Sangaline, E.
Sarkar, A.
Schambach, J.
Scharenberg, R. P.
Schaub, J.
Schmah, A. M.
Schmitz, N.
Schuster, T. R.
Seele, J.
Seger, J.
Selyuzhenkov, I.
Seyboth, P.
Shah, N.
Shahaliev, E.
Shao, M.
Sharma, M.
Shi, S. S.
Shou, Q. Y.
Sichtermann, E. P.
Simon, F.
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Solanki, D.
Sorensen, P.
deSouza, U. G.
Spinka, H. M.
Srivastava, B.
Stanislaus, T. D. S.
Steadman, S. G.
Stevens, J. R.
Stock, R.
Strikhanov, M.
Stringfellow, B.
Suaide, A. A. P.
Suarez, M. C.
Subba, N. L.
Sumbera, M.
Sun, X. M.
Sun, Y.
Sun, Z.
Surrow, B.
Svirida, D. N.
Symons, T. J. M.
Szanto de Toledo, A.
Takahashi, J.
Tang, A. H.
Tang, Z.
Tarini, L. H.
Tarnowsky, T.
Thein, D.
Thomas, J. H.
Tian, J.
Timmins, A. R.
Tlusty, D.
Tokarev, M.
Trentalange, S.
Tribble, R. E.
Tribedy, P.
Trzeciak, B. A.
Tsai, O. D.
Ullrich, T.
Underwood, D. G.
Van Buren, G.
van Nieuwenhuizen, G.
Vanfossen, J. A., Jr.
Varma, R.
Vasconcelos, G. M. S.
Vasiliev, A. N.
Videbk, F.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Wada, M.
Walker, M.
Wang, F.
Wang, G.
Wang, H.
Wang, J. S.
Wang, Q.
Wang, X. L.
Wang, Y.
Webb, G.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wissink, S. W.
Witt, R.
Witzke, W.
Wu, Y. F.
Xiao, Z.
Xie, W.
Xu, H.
Xu, N.
Xu, Q. H.
Xu, W.
Xu, Y.
Xu, Z.
Xue, L.
Yang, Y.
Yang, Y.
Yepes, P.
Yip, K.
Yoo, I. -K.
Zawisza, M.
Zbroszczyk, H.
Zhan, W.
Zhang, J. B.
Zhang, S.
Zhang, W. M.
Zhang, X. P.
Zhang, Y.
Zhang, Z. P.
Zhao, F.
Zhao, J.
Zhong, C.
Zhu, X.
Zhu, Y. H.
Zoulkarneeva, Y.
CA STAR Collaboration
TI Directed and elliptic flow of charged particles in Cu plus Cu collisions
at root s(NN)=22.4 GeV
SO PHYSICAL REVIEW C
LA English
DT Article
ID QUARK-GLUON PLASMA; NUCLEUS-NUCLEUS COLLISIONS; TIME PROJECTION CHAMBER;
HEAVY-ION COLLISIONS; COLLECTIVE FLOW; STAR; COLLABORATION; PERSPECTIVE;
SIGNATURE
AB This paper reports results for directed flow v(1) and elliptic flow v(2) of charged particles in Cu + Cu collisions at root s(NN) = 22.4 GeV at the Relativistic Heavy Ion Collider. The measurements are for the 0-60% most central collisions, using charged particles observed in the STAR detector. Our measurements extend to 22.4-GeV Cu + Cu collisions the prior observation that v1 is independent of the system size at 62.4 and 200 GeV and also extend the scaling of v(1) with eta/y(beam) to this system. The measured v(2)(p(T)) in Cu + Cu collisions is similar for root s(NN) throughout the range 22.4 to 200 GeV. We also report a comparison with results from transport model (ultrarelativistic quantum molecular dynamics and multiphase transport model) calculations. The model results do not agree quantitatively with the measured v(1)(eta), v(2)(p(T)), and v(2)(eta).
C1 [Agakishiev, G.; Alakhverdyants, A. V.; Averichev, G. S.; Bunzarov, I.; Dedovich, T. G.; Efimov, L. G.; Fedorisin, J.; Filip, P.; Kechechyan, A.; Kizka, V.; Lednicky, R.; Panebratsev, Y.; Rogachevskiy, O. V.; Shahaliev, E.; Tokarev, M.; Vokal, S.; Zoulkarneeva, Y.] Joint Inst Nucl Res, Dubna 141980, Russia.
[Bridgeman, A.; Krueger, K.; Spinka, H. M.; Underwood, D. G.] Argonne Natl Lab, Argonne, IL 60439 USA.
[Arkhipkin, D.; Beavis, D. R.; Bland, L. C.; Burton, T. P.; Christie, W.; Debbe, R. R.; Didenko, L.; Dunlop, J. C.; Fine, V.; Fisyak, Y.; Gordon, A.; Guryn, W.; Lamont, M. A. C.; Landgraf, J. M.; Lauret, J.; Lebedev, A.; Lee, J. H.; LeVine, M. J.; Ljubicic, T.; Longacre, R. S.; Mitrovski, M. K.; Ogawa, A.; Pile, P.; Ruan, L.; Sorensen, P.; Tang, A. H.; Ullrich, T.; Van Buren, G.; Videbk, F.; Webb, J. C.; Xu, Z.; Yip, K.] Brookhaven Natl Lab, Upton, NY 11973 USA.
[Crawford, H. J.; Engelage, J.; Judd, E. G.; Perkins, C.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
[Brovko, S. G.; Sanchez, M. Calderon de la Barca; Cebra, D.; Draper, J. E.; Haag, B.; Liu, H.; Mall, O. I.; Reed, R.; Romero, J. L.; Salur, S.; Sangaline, E.] Univ Calif Davis, Davis, CA 95616 USA.
[Cendejas, R.; Huang, H. Z.; Igo, G.; Shah, N.; Trentalange, S.; Tsai, O. D.; Wang, G.; Whitten, C., Jr.; Xu, W.; Zhao, F.] Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
[Derradi de Souza, R.; Takahashi, J.; Vasconcelos, G. M. S.] Univ Estadual Campinas, BR-13083970 Campinas, SP, Brazil.
[Betts, R. R.; Evdokimov, O.; Hofman, D. J.; Kauder, K.; Pei, H.; Suarez, M. C.] Univ Illinois, Chicago, IL 60607 USA.
[Cherney, M.; Gorbunov, Y. N.; McShane, T. S.; Seger, J.] Creighton Univ, Omaha, NE 68178 USA.
[Bielcik, J.; Hajkova, O.; Krus, M.; Pachr, M.] Czech Tech Univ, FNSPE, CZ-11519 Prague, Czech Republic.
[Bielcikova, J.; Chaloupka, P.; Chung, P.; Kapitan, J.; Kouchpil, V.; Rusnak, J.; Sumbera, M.; Tlusty, D.] Nucl Res Inst AS CR, CZ-25068 Rez, Czech Republic.
[Kollegger, T.; Schuster, T. R.; Stock, R.] Goethe Univ Frankfurt, D-60325 Frankfurt, Germany.
[Jena, C.; Mahapatra, D. P.] Inst Phys, Bhubaneswar 751005, Orissa, India.
[Behera, N. K.; Nandi, B. K.; Pujahari, P. R.; Sarkar, A.; Varma, R.] Indian Inst Technol, Bombay 400076, Maharashtra, India.
[Jacobs, W. W.; Page, B. S.; Selyuzhenkov, I.; Stevens, J. R.; Wissink, S. W.] Indiana Univ, Bloomington, IN 47408 USA.
[Alekseev, I.; Bordyuzhin, I. G.; Koroleva, L.; Morozov, B.; Svirida, D. N.] Alikhanov Inst Theoret & Expt Phys, Moscow 117218, Russia.
[Bhasin, A.; Dogra, S. M.; Gupta, A.; Gupta, S.; Potukuchi, B. V. K. S.] Univ Jammu, Jammu 180001, India.
[Alford, J.; Anderson, B. D.; Bouchet, J.; Joseph, J.; Keane, D.; Kumar, L.; Margetis, S.; Subba, N. L.; Vanfossen, J. A., Jr.; Zhang, W. M.] Kent State Univ, Kent, OH 44242 USA.
[Fatemi, R.; Fersch, R. G.; Korsch, W.; Webb, G.; Witzke, W.] Univ Kentucky, Lexington, KY 40506 USA.
[Du, C. M.; Qiu, H.; Sun, Z.; Wang, J. S.; Xu, H.; Yang, Y.; Zhan, W.] Inst Modern Phys, Lanzhou 730000, Peoples R China.
[Dong, X.; Grebenyuk, O. G.; Hjort, E.; Jacobs, P.; Kiryluk, J.; Klein, S. R.; Masui, H.; Matis, H. S.; Naglis, M.; Odyniec, G.; Olson, D.; Ploskon, M. A.; Porter, J.; Poskanzer, A. M.; Powell, C. B.; Ritter, H. G.; Sakrejda, I.; Schmah, A. M.; Sichtermann, E. P.; Sun, X. M.; Symons, T. J. M.; Thomas, J. H.; Wieman, H.; Xu, N.; Zhang, Y.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Balewski, J.; Betancourt, M. J.; Corliss, R.; Hays-Wehle, J. P.; Leight, W.; Milner, R.; Redwine, R.; Seele, J.; Steadman, S. G.; Surrow, B.; van Nieuwenhuizen, G.; Walker, M.] MIT, Cambridge, MA 02139 USA.
[Schmitz, N.; Seyboth, P.; Simon, F.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
[Tarnowsky, T.; Wang, H.; Westfall, G. D.] Michigan State Univ, E Lansing, MI 48824 USA.
[Brandin, A. V.; Kotchenda, L.; Kravtsov, P.; Lukashov, E. V.; Okorokov, V.; Strikhanov, M.] Moscow Engn Phys Inst, Moscow 115409, Russia.
[Braidot, E.; Peitzmann, T.] NIKHEF, NL-1098 XG Amsterdam, Netherlands.
[Braidot, E.; Peitzmann, T.] Univ Utrecht, NL-1098 XG Amsterdam, Netherlands.
[Anson, C. D.; Gangadharan, D. R.; Humanic, T. J.; Lisa, M. A.] Ohio State Univ, Columbus, OH 43210 USA.
[Bueltmann, S.; Koralt, I.; Plyku, D.] Old Dominion Univ, Norfolk, VA 23529 USA.
[Aggarwal, M. M.; Bhati, A. K.; Pruthi, N. K.] Panjab Univ, Chandigarh 160014, India.
[Eun, L.; Heppelmann, S.] Penn State Univ, University Pk, PA 16802 USA.
[Derevschikov, A. A.; Meschanin, A.; Minaev, N. G.; Morozov, D. A.; Nogach, L. V.; Nurushev, S. B.; Vasiliev, A. N.] Inst High Energy Phys, Protvino 142281, Russia.
[Hirsch, A.; Kikola, D. P.; Konzer, J.; Li, X.; Llope, W. J.; Mustafa, M. K.; Scharenberg, R. P.; Skoby, M. J.; Srivastava, B.; Stringfellow, B.; Wang, F.; Wang, Q.; Xie, W.] Purdue Univ, W Lafayette, IN 47907 USA.
[Choi, K. E.; Oh, K.; Yoo, I. -K.] Pusan Natl Univ, Pusan 609735, South Korea.
[Raniwala, R.; Raniwala, S.; Solanki, D.] Univ Rajasthan, Jaipur 302004, Rajasthan, India.
[Eppley, G.; Geurts, F.; Liu, J.; McDonald, D.; Roberts, J. B.; Yepes, P.] Rice Univ, Houston, TX 77251 USA.
[Lima, L. M.; Munhoz, M. G.; Oliveira, R. A. N.; deSouza, U. G.; Suaide, A. A. P.; Szanto de Toledo, A.] Univ Sao Paulo, BR-05508090 Sao Paulo, Brazil.
[Chen, H. F.; Cui; Huang, B.; Li, C.; Lu, Y.; Luo, X.; Shao, M.; Sun, Y.; Tang, Z.; Wang, X. L.; Xu, Y.; Zhang, Z. P.] Univ Sci & Technol China, Hefei 230026, Peoples R China.
[Deng, J.; Li, X.; Xu, Q. H.] Shandong Univ, Jinan 250100, Shandong, Peoples R China.
[Cai, X. Z.; Chen, J. H.; Han, L. -X.; Jin, F.; Li, W.; Ma, G. L.; Ma, Y. G.; Shou, Q. Y.; Tian, J.; Xue, L.; Zhang, S.; Zhao, J.; Zhong, C.; Zhu, Y. H.] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
[Borowski, W.; Estienne, M.; Kabana, S.] SUBATECH, F-44307 Nantes, France.
[Cervantes, M. C.; Codrington, M. J. M.; Djawotho, P.; Drachenberg, J. L.; Gagliardi, C. A.; Hamed, A.; Huo, L.; Mioduszewski, S.; Mohammed, Y.; Tribble, R. E.] Texas A&M Univ, College Stn, TX 77843 USA.
[Leyva, A. Davila; Hoffmann, G. W.; Li, L.; Markert, C.; Oldag, E. W.; Ray, R. L.; Schambach, J.; Thein, D.; Wada, M.] Univ Texas Austin, Austin, TX 78712 USA.
[Bellwied, R.; De Silva, L. C.; Timmins, A. R.] Univ Houston, Houston, TX 77204 USA.
[Cheng, J.; Kang, K.; Li, Y.; Wang, Y.; Xiao, Z.; Zhang, X. P.; Zhu, X.] Tsinghua Univ, Beijing 100084, Peoples R China.
[Witt, R.] USN Acad, Annapolis, MD 21402 USA.
[Grosnick, D.; Koetke, D. D.; Manweiler, R.; Schaub, J.; Stanislaus, T. D. S.] Valparaiso Univ, Valparaiso, IN 46383 USA.
[Ahammed, Z.; Chattopadhyay, S.; Ghosh, P.; Mohanty, B.; Mondal, M. M.; Nayak, T. K.; Pal, S. K.; Sahoo, N. R.; Singaraju, R. N.; Tribedy, P.; Viyogi, Y. P.] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, India.
[Kisiel, A.; Pandit, Y.; Pawlak, T.; Peryt, W.; Pluta, J.; Trzeciak, B. A.; Zawisza, M.; Zbroszczyk, H.] Warsaw Univ Technol, PL-00661 Warsaw, Poland.
[Bichsel, H.; Cramer, J. G.; Kettler, D.; Prindle, D.] Univ Washington, Seattle, WA 98195 USA.
[Elnimr, M.; LaPointe, S.; Pruneau, C.; Sharma, M.; Tarini, L. H.; Voloshin, S. A.] Wayne State Univ, Detroit, MI 48201 USA.
[Chen, J. Y.; Chen, L.; Ke, H. W.; Li, N.; Li, Z. M.; Liu, F.; Shi, S. S.; Wu, Y. F.; Yang, Y.; Zhang, J. B.] CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China.
[Bruna, E.; Caines, H.; Chikanian, A.; Finch, E.; Harris, J. W.; Heinz, M.; Knospe, A. G.; Majka, R.; Ohlson, A.; Putschke, J.; Sandweiss, J.; Smirnov, N.] Yale Univ, New Haven, CT 06520 USA.
[Planinic, M.; Poljak, N.] Univ Zagreb, HR-10002 Zagreb, Croatia.
RP Agakishiev, G (reprint author), Joint Inst Nucl Res, Dubna 141980, Russia.
RI Xue, Liang/F-8077-2013; Takahashi, Jun/B-2946-2012; Planinic,
Mirko/E-8085-2012; Yoo, In-Kwon/J-6222-2012; Voloshin,
Sergei/I-4122-2013; Pandit, Yadav/I-2170-2013; Lednicky,
Richard/K-4164-2013; Yang, Yanyun/B-9485-2014; Rusnak, Jan/G-8462-2014;
Bielcikova, Jana/G-9342-2014; Peitzmann, Thomas/K-2206-2012; Witt,
Richard/H-3560-2012; Yip, Kin/D-6860-2013; Inst. of Physics, Gleb
Wataghin/A-9780-2017; Okorokov, Vitaly/C-4800-2017; Ma,
Yu-Gang/M-8122-2013; Alekseev, Igor/J-8070-2014; Sumbera,
Michal/O-7497-2014; Strikhanov, Mikhail/P-7393-2014; Xu,
Wenqin/H-7553-2014; XIAO, Zhigang/C-3788-2015; Aparecido Negrao de
Oliveira, Renato/G-9133-2015; Bruna, Elena/C-4939-2014; Dogra, Sunil
/B-5330-2013; Chaloupka, Petr/E-5965-2012; Huang, Bingchu/H-6343-2015;
Derradi de Souza, Rafael/M-4791-2013; Suaide, Alexandre/L-6239-2016;
Svirida, Dmitry/R-4909-2016
OI Xue, Liang/0000-0002-2321-9019; Takahashi, Jun/0000-0002-4091-1779;
Pandit, Yadav/0000-0003-2809-7943; Yang, Yanyun/0000-0002-5982-1706;
Peitzmann, Thomas/0000-0002-7116-899X; Yip, Kin/0000-0002-8576-4311;
Okorokov, Vitaly/0000-0002-7162-5345; Ma, Yu-Gang/0000-0002-0233-9900;
Alekseev, Igor/0000-0003-3358-9635; Sumbera, Michal/0000-0002-0639-7323;
Strikhanov, Mikhail/0000-0003-2586-0405; Xu, Wenqin/0000-0002-5976-4991;
Bruna, Elena/0000-0001-5427-1461; Huang, Bingchu/0000-0002-3253-3210;
Derradi de Souza, Rafael/0000-0002-2084-7001; Suaide,
Alexandre/0000-0003-2847-6556;
FU RHIC Operations Group; RCF at BNL; NERSC Center at LBNL; Open Science
Grid consortium; Office of NP within the US DOE Office of Science;
Office of HEP within the US DOE Office of Science; US NSF; Sloan
Foundation; DFG of Germany; CNRS/ IN2P3; FAPESP CNPq of Brazil; Ministry
of Education and Science of the Russian Federation; NNSFC; CAS; MoST;
MoE of China; GA; MSMT of the Czech Republic; FOM; NWO of the
Netherlands; DAE; DST; CSIR of India; Polish Ministry of Science and
Higher Education; Korea Research Foundation; Ministry of Science,
Education and Sports of the Republic of Croatia; RosAtom of Russia
FX We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at
LBNL and the Open Science Grid consortium for providing resources and
support. This work was supported in part by the Offices of NP and HEP
within the US DOE Office of Science; the US NSF; the Sloan Foundation;
the DFG cluster of excellence "Origin and Structure of the Universe" of
Germany; CNRS/ IN2P3, FAPESP CNPq of Brazil; Ministry of Education and
Science of the Russian Federation, NNSFC, CAS, MoST, and MoE of China;
GA and MSMT of the Czech Republic; FOM and NWO of the Netherlands; DAE,
DST, and CSIR of India; Polish Ministry of Science and Higher Education;
Korea Research Foundation; Ministry of Science, Education and Sports of
the Republic of Croatia; and RosAtom of Russia.
NR 34
TC 14
Z9 14
U1 0
U2 17
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 JAN 3
PY 2012
VL 85
IS 1
AR 014901
DI 10.1103/PhysRevC.85.014901
PG 9
WC Physics, Nuclear
SC Physics
GA 873YT
UT WOS:000298922700004
ER
PT J
AU Delehanty, JB
Medintz, IL
AF Delehanty, James B.
Medintz, Igor L.
TI Elaborate Nanoparticle-Based Traps for Catching Cytosolic Players in the
Act
SO CHEMBIOCHEM
LA English
DT Editorial Material
DE fluorescence; molecular interactions; nanoclusters; proteins;
self-assembly
C1 [Delehanty, James B.; Medintz, Igor L.] USN, Ctr Bio Mol Sci & Engn, Res Lab, Washington, DC 20375 USA.
RP Medintz, IL (reprint author), USN, Ctr Bio Mol Sci & Engn, Res Lab, Code 6900, Washington, DC 20375 USA.
EM igor.medintz@nrl.navy.mil
NR 19
TC 4
Z9 4
U1 0
U2 12
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1439-4227
J9 CHEMBIOCHEM
JI ChemBioChem
PD JAN 2
PY 2012
VL 13
IS 1
BP 30
EP 33
DI 10.1002/cbic.201100589
PG 4
WC Biochemistry & Molecular Biology; Chemistry, Medicinal
SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy
GA 867VK
UT WOS:000298482700004
PM 22121106
ER
PT S
AU Aguilar, CO
AF Aguilar, Cesar O.
GP IEEE
TI Local controllability of control-affine systems with quadractic drift
and constant control-input vector fields
SO 2012 IEEE 51ST ANNUAL CONFERENCE ON DECISION AND CONTROL (CDC)
SE IEEE Conference on Decision and Control
LA English
DT Proceedings Paper
CT 51st IEEE Annual Conference on Decision and Control (CDC)
CY DEC 10-13, 2012
CL HI
SP IEEE, Soc Ind & Appl Math, Inst Operat Res Management Sci, Japanese Soc Instrument & Control Engineers, European Union Control Assoc, Int Federat Automat Control, Elsevier, GE Global Res, MathWorks, Springer, Univ Hawaii Manoa, Coll Engn, Univ Texas Dallas, Journal Franklin Inst, Engn & Appl Math, Taylor & Francis Grp, Visual Solut, Wolfram Res
ID HOMOGENEOUS SYSTEMS
AB In this paper we study the small-time local controllability (STLC) property of polynomial control-affine systems whose drift vector field is a 2-homogeneous polynomial vector field and whose control-input vector fields are constant. Such systems arise in the study of controllability of mechanical control systems. Using control variations and rooted trees, we obtain a combinatorial expression for the Taylor series coefficients of a composition of flows of vector fields and use it to derive a high-order sufficient condition for STLC for these systems. The resulting condition is stated in terms of the image of the control-input subspace under the drift vector field and is therefore invariant under (linear) feedback transformations.
C1 Naval Postgrad Sch, Dept Appl Math, Monterey, CA USA.
RP Aguilar, CO (reprint author), Naval Postgrad Sch, Dept Appl Math, Monterey, CA USA.
EM coaguila@nps.edu
NR 15
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0191-2216
BN 978-1-4673-2066-5
J9 IEEE DECIS CONTR P
PY 2012
BP 1877
EP 1882
PG 6
WC Automation & Control Systems; Computer Science, Artificial Intelligence;
Engineering, Electrical & Electronic
SC Automation & Control Systems; Computer Science; Engineering
GA BIB20
UT WOS:000327200402043
ER
PT S
AU Andersson, K
Jones, K
Dobrokhodov, V
Kaminer, I
AF Andersson, Klas
Jones, Kevin
Dobrokhodov, Vladimir
Kaminer, Isaac
GP IEEE
TI Thermal Highs and Pitfall Lows - Notes on the Journey to the First
Cooperative Autonomous Soaring Flight
SO 2012 IEEE 51ST ANNUAL CONFERENCE ON DECISION AND CONTROL (CDC)
SE IEEE Conference on Decision and Control
LA English
DT Proceedings Paper
CT 51st IEEE Annual Conference on Decision and Control (CDC)
CY DEC 10-13, 2012
CL HI
SP IEEE, Soc Ind & Appl Math, Inst Operat Res Management Sci, Japanese Soc Instrument & Control Engineers, European Union Control Assoc, Int Federat Automat Control, Elsevier, GE Global Res, MathWorks, Springer, Univ Hawaii Manoa, Coll Engn, Univ Texas Dallas, Journal Franklin Inst, Engn & Appl Math, Taylor & Francis Grp, Visual Solut, Wolfram Res
AB This paper discusses the development and flight testing of an algorithm for cooperative soaring by multiple autonomous gliders. Flight test results confirmed that the algorithm functioned as expected and that the gliders worked cooperatively to find and utilize the same updrafts during the test. However, the flight also indicated that the effectiveness of the strategy depends largely on the existing thermal conditions in combination with how restrictively the limits of separation be tween the cooperating gliders are set. To the best of the authors' knowledge this was the world's first cooperative autonomous thermal soaring flight.
C1 [Andersson, Klas; Jones, Kevin; Dobrokhodov, Vladimir; Kaminer, Isaac] Naval Postgrad Sch, Dept Mech & Aeronaut Eng, Monterey, CA 93940 USA.
RP Andersson, K (reprint author), Naval Postgrad Sch, Dept Mech & Aeronaut Eng, Monterey, CA 93940 USA.
EM klas.andersson.mil@gmail.com; jones@nps.edu; vldobr@nps.edu;
kaminer@nps.edu
NR 14
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0191-2216
BN 978-1-4673-2066-5
J9 IEEE DECIS CONTR P
PY 2012
BP 3392
EP 3397
PG 6
WC Automation & Control Systems; Computer Science, Artificial Intelligence;
Engineering, Electrical & Electronic
SC Automation & Control Systems; Computer Science; Engineering
GA BIB20
UT WOS:000327200403119
ER
PT S
AU Krener, AJ
AF Krener, Arthur J.
GP IEEE
TI Filtering Boundary Value Continuous Time Invariant Linear Systems
SO 2012 IEEE 51ST ANNUAL CONFERENCE ON DECISION AND CONTROL (CDC)
SE IEEE Conference on Decision and Control
LA English
DT Proceedings Paper
CT 51st IEEE Annual Conference on Decision and Control (CDC)
CY DEC 10-13, 2012
CL HI
SP IEEE, Soc Ind & Appl Math, Inst Operat Res Management Sci, Japanese Soc Instrument & Control Engineers, European Union Control Assoc, Int Federat Automat Control, Elsevier, GE Global Res, MathWorks, Springer, Univ Hawaii Manoa, Coll Engn, Univ Texas Dallas, Journal Franklin Inst, Engn & Appl Math, Taylor & Francis Grp, Visual Solut, Wolfram Res
AB We develop the optimal filter for a linear time invariant boundary value system. A linear time invariant boundary value system is a standard linear system, A, B, C, D with the initial conditions replaced by well-posed boundary conditions. We assume that the system is driven by and observed in white Gaussian noise and the boundary value is an independent Gaussian random vector. The boundary value filter reconstructs the current state from the past observations and the mean and variance of the boundary value. It minimizes the error variance over all possible filters. We show by example that knowledge of the boundary conditions can lead to an order of magnitude reduction in the standard error as compared with a Kalman filter. The boundary value filter for an n dimensional system can be realized by a 2n dimensional system.
C1 Naval Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
RP Krener, AJ (reprint author), Naval Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
EM ajkrener@nps.edu
NR 8
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0191-2216
BN 978-1-4673-2066-5
J9 IEEE DECIS CONTR P
PY 2012
BP 3814
EP 3820
PG 7
WC Automation & Control Systems; Computer Science, Artificial Intelligence;
Engineering, Electrical & Electronic
SC Automation & Control Systems; Computer Science; Engineering
GA BIB20
UT WOS:000327200404026
ER
PT S
AU Bordonaro, SV
Willett, P
Bar-Shalom, Y
AF Bordonaro, Steven V.
Willett, Peter
Bar-Shalom, Yaakov
GP IEEE
TI Bias Elimination in Tracking with Converted Position and Doppler
Measurements
SO 2012 IEEE 51ST ANNUAL CONFERENCE ON DECISION AND CONTROL (CDC)
SE IEEE Conference on Decision and Control
LA English
DT Proceedings Paper
CT 51st IEEE Annual Conference on Decision and Control (CDC)
CY DEC 10-13, 2012
CL HI
SP IEEE, Soc Ind & Appl Math, Inst Operat Res Management Sci, Japanese Soc Instrument & Control Engineers, European Union Control Assoc, Int Federat Automat Control, Elsevier, GE Global Res, MathWorks, Springer, Univ Hawaii Manoa, Coll Engn, Univ Texas Dallas, Journal Franklin Inst, Engn & Appl Math, Taylor & Francis Grp, Visual Solut, Wolfram Res
AB In target tracking, it is natural to describe target motion in Cartesian coordinates. In many cases the measurements require some form of nonlinear conversion prior to use in a Cartesian coordinate tracker. There are two sources of bias that can arise as a result of this conversion. The first occurs when the conversion process introduces a bias in the expected value of the converted measurement. The second is estimation bias that occurs when the estimate of the converted measurement error covariance is correlated with the measurement noise. The conversion and estimation biases of previously proposed conversions, including the recently proposed "Decorrelated Unbiased Converted Measurement (DUCM)", are evaluated for two forms of measurement conversion. The first is the conversion from polar to Cartesian coordinates. The second is range-rate estimation from a moving platform.
C1 [Bordonaro, Steven V.] Naval Undersea Warfare Ctr, Newport, RI 02871 USA.
RP Bordonaro, SV (reprint author), Naval Undersea Warfare Ctr, Newport, RI 02871 USA.
EM steven.bordonaro@navy.mil; willett@engr.uconn.edu; ybs@engr.uconn.edu
OI Willett, Peter/0000-0001-8443-5586
NR 14
TC 1
Z9 1
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0191-2216
BN 978-1-4673-2066-5
J9 IEEE DECIS CONTR P
PY 2012
BP 4089
EP 4094
PG 6
WC Automation & Control Systems; Computer Science, Artificial Intelligence;
Engineering, Electrical & Electronic
SC Automation & Control Systems; Computer Science; Engineering
GA BIB20
UT WOS:000327200404069
ER
PT S
AU Ellis, M
Mitchell, L
Jackson, SL
Zier, JC
O'Malley, J
Threadgold, JR
Clemett, CD
Thandi, A
Martin, PN
AF Ellis, Mark
Mitchell, Lee
Jackson, Stuart L.
Zier, Jacob C.
O'Malley, John
Threadgold, Jim R.
Clemett, Ceri D.
Thandi, Amandeep
Martin, Philip N.
BE Yu, B
TI Activation of Sodium Iodide Detectors in an Active Interrogation
Environment
SO 2012 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE
RECORD (NSS/MIC)
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium / Medical Imaging Conference Record
(NSS/MIC) / 19th Room-Temperature Semiconductor X-ray and Gamma-ray
Detector Workshop
CY OCT 29-NOV 03, 2012
CL Anaheim, CA
SP IEEE, IEEE Nucl & Plasma Sci Soc
AB Applications such as the Active Interrogation of shielded nuclear material that require the detection of specific gamma and neutron signatures in a high mixed radiation field background, require detector materials and device fabrications that are not highly susceptible to neutron or photon activation. This paper presents an activation analysis from Active Interrogation experiments where a pulsed-power accelerator was used to deliver 2.5 MeV protons onto a lithium target to produce a spectrum of neutrons up to 1 MeV. The experimental objectives were to characterize the neutron energy spectrum and spatial distribution produced from the ion beam diode utilized with the pulsed accelerator with a view to its utility for the purposes of active detection. A variety of neutron and gamma detectors were used to record the resulting signatures including sodium iodide (NaI), which is the main focus of this paper, and which is also a candidate detector technology to detect fission signatures from active detection systems. A High Purity Germanium (HPGe) detector was used to measure the amount of activation created in the NaI detector. The results showed significant activation of the core detection material, with activation product decay time constants of the order of seconds and minutes. Activation of the detector construction materials was also observed. From this type of analysis, the minimum time between active interrogations can be determined based on the recovery time of the detectors following activation, or alternatively, materials can be sought that are less susceptible to activation.
C1 [Ellis, Mark; O'Malley, John; Threadgold, Jim R.; Clemett, Ceri D.; Thandi, Amandeep; Martin, Philip N.] AWE, Reading RG7 4PR, Berks, England.
[Mitchell, Lee] Naval Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Jackson, Stuart L.; Zier, Jacob C.] Naval Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Ellis, M (reprint author), AWE, Reading RG7 4PR, Berks, England.
EM mark.ellis@awe.co.uk; lee.mitchell@nrl.navy.mil;
stuartjackson@nrl.navy.mil
FU U.K. Home Office and Ministry of Defence
FX This work was supported by the U.K. Home Office and Ministry of Defence.
NR 11
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4673-2030-6; 978-1-4673-2028-3
J9 IEEE NUCL SCI CONF R
PY 2012
BP 11
EP 17
PG 7
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BHW16
UT WOS:000326814200004
ER
PT S
AU Mistry, P
Hill, C
O'Malley, J
Precious, J
Ellis, M
Maddock, R
Young, FC
Jackson, SL
Phipps, DG
Woolf, R
Phlips, B
AF Mistry, P.
Hill, C.
O'Malley, J.
Precious, J.
Ellis, M.
Maddock, R.
Young, F. C.
Jackson, S. L.
Phipps, D. G.
Woolf, R.
Phlips, B.
BE Yu, B
TI Photofission for Active SNM Detection II: Intense Pulsed 19F(p,alpha
gamma) 160 Characteristic gamma Source
SO 2012 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE
RECORD (NSS/MIC)
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium / Medical Imaging Conference Record
(NSS/MIC) / 19th Room-Temperature Semiconductor X-ray and Gamma-ray
Detector Workshop
CY OCT 29-NOV 03, 2012
CL Anaheim, CA
SP IEEE, IEEE Nucl & Plasma Sci Soc
AB An ongoing programme investigating the active detection of special nuclear material (SNM) is being undertaken by the Atomic Weapons Establishment (A WE) in collaboration with the Naval Research Laboratory (NRL). The programme is funded through the UK Home Office, Ministry of Defence and Cabinet Office and the Naval Research Laboratory supported primarily through the US Defence Threat Reduction Agency with support also from the Office of Naval Research and the Defence Nuclear Detection Office. The process by which the UK are applying active detection techniques to border protection and a review of the current challenges and opportunities for this technology as assessed by the authors is provided.
As part of this programme, the NRL Mercury IVA was operated in positive polarity mode to produce photons characteristic of the 19F(p,alpha gamma)O-16 reaction, at energies of 6.13, 6.92 and 7.12 MeV. Protons produced by Mercury interact with a thick Teflon (PTFE) target to produce characteristic gamma radiation. These in turn were used to induce photofission in a depleted uranium (DU) sample. Eighteen experiments were fielded in September 2011, in which thirty-five detectors were fielded, including He-3 tubes, NaI detectors, liquid scintillators and high purity germanium detectors, capable of detecting both gamma radiation and neutrons. The results from a selection of those detectors are discussed here.
A variety of high-Z (lead) and hydrogenous (borated polyethylene) and hydrogenous shielding configurations was employed and positive detection was made up to the maximum shielding tested, 8.5g/cm2. Effects of secondary reactions in the photon production are visible in the results and some employed reduction techniques are discussed. Monte Carlo modelling has been employed for a subset of the He-3 tubes fielded. The results have been found to agree within an order of magnitude, but have also been found to die away more quickly than observed in the experimental data.
C1 [Mistry, P.; Hill, C.; O'Malley, J.] Atom Weap Estab, Hydrodynam Div, Aldermaston, England.
[Precious, J.; Ellis, M.] Atom Weap Estab, Natl Nucl Secur Div, Aldermaston, England.
[Maddock, R.] Atom Weap Estab, Div Radiat Sci, Aldermaston, England.
[Young, F. C.; Jackson, S. L.; Phipps, D. G.] Naval Res Lab, Div Plasma Phys, Washington, DC USA.
[Woolf, R.; Phlips, B.] Naval Res Lab, Div Space Sci, Washington, DC USA.
RP Mistry, P (reprint author), Atom Weap Estab, Hydrodynam Div, Aldermaston, England.
EM prina.mistry@awe.co.uk
FU U.K. Home Office and Ministry of Defence
FX This work was supported by the U.K. Home Office and Ministry of Defence
NR 8
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4673-2030-6; 978-1-4673-2028-3
J9 IEEE NUCL SCI CONF R
PY 2012
BP 24
EP 31
PG 8
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BHW16
UT WOS:000326814200007
ER
PT S
AU Clemett, CD
Ellis, M
Hill, C
Threadgold, J
Martin, PN
Jackson, SL
Zier, JC
Hinshelwood, DD
Mitchell, L
Woolf, R
Mosher, D
AF Clemett, C. D.
Ellis, M.
Hill, C.
Threadgold, J.
Martin, P. N.
Jackson, S. L.
Zier, J. C.
Hinshelwood, D. D.
Mitchell, L.
Woolf, R.
Mosher, D.
BE Yu, B
TI Neutrons for active detection of special nuclear material: an intense
pulsed Li-7(p, n)Be-7 source
SO 2012 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE
RECORD (NSS/MIC)
SE IEEE Nuclear Science Symposium Conference Record
LA English
DT Proceedings Paper
CT IEEE Nuclear Science Symposium / Medical Imaging Conference Record
(NSS/MIC) / 19th Room-Temperature Semiconductor X-ray and Gamma-ray
Detector Workshop
CY OCT 29-NOV 03, 2012
CL Anaheim, CA
SP IEEE, IEEE Nucl & Plasma Sci Soc
ID THICK TARGET; YIELDS
AB An ongoing program me looking at the active detection of special nuclear material (SNM) is being undertaken by the Atomic Weapons Establishment (A WE) in collaboration with the Naval Research Laboratory (NRL). As part of this programme, pulsed-power driven neutron experiments were conducted at the NRL Mercury accelerator. Mercury was used in a positive polarity mode to produce and accelerate protons into lithium metal foils, generating neutrons via the Li-7(p,n)Be-7 reaction. 13 shots were carried out at varying machine voltages and over 30 separate neutron and gamma-ray diagnostics were fielded to characterise the angular distribution and energy spectrum of the neutrons generated. Machine performance, neutron, and gamma-ray data are presented and discussed. Neutron yields of up to 10(11) neutrons/steradian were recorded, with yields at 60 degrees off axis being approximately 50% of the on axis yield. Previously published analysis [1] of data has been used to validate GEANT4 modelling of the experiments [2]. Machine performance data has been used in conjunction with modelled neutron spectra to predict the performance of the Mercury Li-7(p,n)Be-7 source as a system for detecting SNM.
C1 [Clemett, C. D.; Hill, C.; Threadgold, J.; Martin, P. N.] Atom Weap Estab, Hydrodynam Div, Reading, Berks, England.
[Ellis, M.] Atom Weap Estab, Natl Inst Secur Div, Reading, Berks, England.
[Jackson, S. L.; Zier, J. C.; Hinshelwood, D. D.] Naval Res Lab, Div Plasma Phys, Washington, DC USA.
[Mitchell, L.; Woolf, R.] Naval Res Lab, Div Space Sci, Washington, DC USA.
RP Clemett, CD (reprint author), Atom Weap Estab, Hydrodynam Div, Reading, Berks, England.
EM ceri.clemett@awe.co.uk
OI Woolf, Richard/0000-0003-4859-1711
FU UK Home Office and Ministry of Defence
FX This work was supported by the UK Home Office and Ministry of Defence.
NR 12
TC 1
Z9 1
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1082-3654
BN 978-1-4673-2030-6; 978-1-4673-2028-3
J9 IEEE NUCL SCI CONF R
PY 2012
BP 44
EP 50
PG 7
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BHW16
UT WOS:000326814200010
ER
PT S
AU Majumdar, AK
Siegenthaler, J
Land, P
AF Majumdar, Arun K.
Siegenthaler, John
Land, Phillip
BE VanEijk, AMJ
Davis, CC
Hammel, SM
Majumdar, AK
TI Analysis of Optical Communications through the Random Air-Water
interface: feasibility for Under-Water Communications
SO LASER COMMUNICATION AND PROPAGATION THROUGH THE ATMOSPHERE AND OCEANS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Laser Communication and Propagation through the Atmosphere
and Oceans
CY AUG 13-15, 2012
CL San Diego, CA
SP SPIE
DE optical communications; air-water interface; underwater communications;
random media
ID BEAM WANDER; UPLINK
AB New results for investigating optical propagation through the random wavy air-water interface relevant to underwater optical communications are presented. A laser beam propagating through the air-water interface reaching a receiver below the water surface, as well as propagated through the water towards an airborne receiver, is significantly distorted due to the high geometric phase aberrations introduced by the random motion of the water surface waves. This causes a significant reduction in the received communications signal resulting in limiting the data transfer capability and the transmitting and receiving data rates. This research develops probabilistic models for optical propagation at the random air-water interface for both reflection and transmission cases under various wind speed conditions. Preliminary results from a laboratory water tank experiment provide information about histograms or the probability density functions of intensity fluctuations measured by a CCD camera for both reflection and transmission cases. Angular displacements of the centroid of the fluctuating laser beam generates the beam wander effects. Finally preliminary results for BER estimates for an on-off keying (OOK) for air-water interface only are presented for a communication system where random air-water interface is a part of communication channel.
C1 [Majumdar, Arun K.; Siegenthaler, John; Land, Phillip] Naval Air Warfare Ctr, Weap Div, China Lake, CA 93555 USA.
RP Majumdar, AK (reprint author), Naval Air Warfare Ctr, Weap Div, China Lake, CA 93555 USA.
EM arun.majumdar@navy.mil
NR 8
TC 1
Z9 1
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9234-0
J9 PROC SPIE
PY 2012
VL 8517
AR 85170T
DI 10.1117/12.928999
PG 13
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BHT83
UT WOS:000326648200022
ER
PT B
AU Geder, JD
Ramamurti, R
Palmisano, J
Pruessner, M
Ratna, B
Sandberg, WC
AF Geder, Jason D.
Ramamurti, Ravi
Palmisano, John
Pruessner, Marius
Ratna, Banahalli
Sandberg, William C.
GP ASME
TI FOUR-FIN BIO-INSPIRED UUV: MODELING AND CONTROL SOLUTIONS
SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS
AND EXPOSITION 2011, VOL 2
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
(IMECE)
CY NOV 11-17, 2011
CL Denver, CO
SP Amer Soc Mech Engn
ID MECHANICS; DESIGN
AB This paper describes the modeling and control development of a bio-inspired unmanned underwater vehicle (UUV) propelled by four pectoral fins. Based on both computational fluid dynamics (CFD) and experimental fin data, we develop a UUV model that focuses on an accurate representation of the fin-generated forces. Models of these forces span a range of controllable fin parameters, as well as take into account leading-trailing fin interactions and free stream flow speeds. The vehicle model is validated by comparing open-loop simulated responses with experimentally measured responses to identical fin inputs. Closed-loop control algorithms, which command changes in fin kinematics, are tested on the vehicle. Comparison of experimental and simulation results for various maneuvers validates the fin and vehicle models, and demonstrates the precise maneuvering capabilities enabled by the actively controlled curvature pectoral fins.
C1 [Geder, Jason D.; Ramamurti, Ravi] US Naval Res Lab, Lab Computat Phys & Fluid Dynam, Washington, DC USA.
[Palmisano, John; Pruessner, Marius; Ratna, Banahalli] US Naval Res Lab, Ctr Biomol Sci & Engn, Washington, DC USA.
[Sandberg, William C.] Int Corp, Modeling & Anal Div Sci Appl, Mclean, VA USA.
RP Geder, JD (reprint author), US Naval Res Lab, Lab Computat Phys & Fluid Dynam, Washington, DC USA.
NR 21
TC 0
Z9 0
U1 0
U2 3
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5488-4
PY 2012
BP 799
EP +
PG 2
WC Engineering, Biomedical; Engineering, Mechanical; Nanoscience &
Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BGX47
UT WOS:000324505000117
ER
PT J
AU Sanghera, JS
Shaw, LB
Gattass, R
Busse, LE
Kim, W
Bayya, S
Gibson, D
Nguyen, V
Kung, F
Chin, G
Baker, C
Ewing, K
Aggarwal, ID
AF Sanghera, J. S.
Shaw, L. B.
Gattass, R.
Busse, L. E.
Kim, W.
Bayya, S.
Gibson, D.
Nguyen, V.
Kung, F.
Chin, G.
Baker, C.
Ewing, K.
Aggarwal, I. D.
GP IEEE
TI Infrared Optical Fibers for Sensors
SO 2012 INTERNATIONAL CONFERENCE ON FIBER OPTICS AND PHOTONICS (PHOTONICS)
LA English
DT Proceedings Paper
CT International Conference on Fiber Optics and Photonics (PHOTONICS)
CY DEC 09-12, 2012
CL Chennai, INDIA
C1 Naval Res Lab, Washington, DC 20375 USA.
RP Sanghera, JS (reprint author), Naval Res Lab, Washington, DC 20375 USA.
RI Baker, Colin/I-6657-2015
NR 0
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-4718-1
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BHQ22
UT WOS:000326324000103
ER
PT S
AU Goodman, J
Bertoncini, C
Moore, M
Nousain, B
Cowart, G
AF Goodman, Joel
Bertoncini, Crystal
Moore, Michael
Nousain, Bryan
Cowart, Gregory
BE Huang, B
Plaza, AJ
Thiebaut, C
TI Frequency Position Modulation using Multi-Spectral Projections
SO SATELLITE DATA COMPRESSION, COMMUNICATIONS, AND PROCESSING VIII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Satellite Data Compression, Communications, and Processing
VIII
CY AUG 12-13, 2012
CL San Diego, CA
SP SPIE
ID MULTIPATH CHANNELS
AB In this paper we present an approach to harness multi-spectral projections (MSPs) to carefully shape and locate tones in frequency, enabling a new and robust modulation in which a signal's discrete frequency support is used to represent symbols. This method, called Frequency Position Modulation (FPM), is an innovative extension to multi-tone-FSK (MT-FSK) and orthogonal frequency division multiplexing (OFDM) and can be non-uniformly spread over many GHz of instantaneous bandwidth (IBW), resulting in a communications system that is resilient to interference and difficult to intercept. The FPM symbols are recovered using adaptive projections that in part employ an analog polynomial nonlinearity paired with an analog-to-digital converter (ADC) sampling at a rate that is only a fraction of the IBW of the signal. MSPs also facilitate using commercial of-the-shelf (COTS) ADCs with uniform-sampling, standing in sharp contrast to random linear projections by random sampling, which requires a full Nyquist rate sample-and-hold. Our novel communication system concept provides an order of magnitude improvement in processing gain over conventional LPI/LPD communications (e. g., CDMA) and facilitates the ability to operate in interference-laden environments where conventional compressed sensing receivers would fail. We quantitatively analyze the symbol error rate (SER) and processing gain (PG) for a maximum likelihood (ML) -based FPM demodulator and demonstrate its performance in interference-laden conditions.
C1 [Goodman, Joel; Bertoncini, Crystal; Nousain, Bryan; Cowart, Gregory] Naval Res Lab, Washington, DC 20375 USA.
RP Goodman, J (reprint author), Naval Res Lab, Washington, DC 20375 USA.
NR 12
TC 0
Z9 0
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9231-9
J9 PROC SPIE
PY 2012
VL 8514
AR UNSP 85140C
DI 10.1117/12.928871
PG 11
WC Engineering, Electrical & Electronic; Optics; Telecommunications
SC Engineering; Optics; Telecommunications
GA BHT13
UT WOS:000326602600011
ER
PT S
AU Magalhaes, M
Smith, TE
AF Magalhaes, Marcelo
Smith, Terry E.
GP IEEE
TI Adaptive Node Capability to Assess the Characteristic Tempo in a
Wireless Communication Network
SO 2012 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC)
SE IEEE Wireless Communications and Networking Conference
LA English
DT Proceedings Paper
CT IEEE Wireless Communications and Networking Conference (WCNC)
CY APR 01-04, 2012
CL Paris, FRANCE
SP IEEE
DE node capability; maximum information exchange rate
ID LINKS
AB This paper develops a new expression for a network node capability value used to quantify the node's ability to maintain an optimal information flow in a mobile communication network. The capability value is adaptable and is a function of the bandwidth efficiency, the data rate, the energy-per-bit to noise spectral density power ratio and reflects how effectively the node can receive, process and transmit data. To evaluate the capability expression a generalized connectivity metric is used which integrates the node capability values along with their connections scaled by the length of the routes (including their directionality) in order to measure the maximum information exchange rate (characteristic tempo) of the network. Simulation results are shown for a prototype four-node dynamic scenario to numerically evaluate the node capability values and the resulting network characteristic tempo.
C1 [Magalhaes, Marcelo; Smith, Terry E.] Naval Postgrad Sch, Monterey, CA USA.
RP Magalhaes, M (reprint author), Naval Postgrad Sch, Monterey, CA USA.
EM pepace@nps.edu
NR 9
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1525-3511
BN 978-1-4673-0437-5; 978-1-4673-0436-8
J9 IEEE WCNC
PY 2012
BP 3013
EP 3018
PG 6
WC Computer Science, Hardware & Architecture; Engineering, Electrical &
Electronic; Telecommunications
SC Computer Science; Engineering; Telecommunications
GA BGY37
UT WOS:000324580703021
ER
PT B
AU Fu, TC
Fullerton, AM
Schleicher, CC
AF Fu, Thomas C.
Fullerton, Anne M.
Schleicher, Christine C.
GP ASME
TI WAVEMAKER LIMITATIONS AND DIFFICULTIES IN MODEL TESTING OF SMALL HIGH
SPEED CRAFT
SO PROCEEDINGS OF THE ASME 31ST INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE
AND ARCTIC ENGINEERING, 2012, VOL 4
LA English
DT Proceedings Paper
CT 31st ASME International Conference on Ocean, Offshore and Arctic
Engineering
CY JUL 01-06, 2012
CL Rio de Janeiro, BRAZIL
SP Petrobras, ASME, Ocean Offshore & Arct Engn Div
AB Model testing of marine platforms has always focused on preserving geometric similitude and Froude number. While Froude scaling does provide a good approximation to true dynamic similitude, there are viscous effects which are not scaled. Additionally, the dynamic testing of small high speed marine craft presents difficulties due to their small size, so while one would prefer to minimize these effects by testing large models, model basin characteristics limit the physical size of the models that can be tested. These issues as they relate to model testing, including sea state scaling and scale effects, are discussed.
C1 [Fu, Thomas C.; Fullerton, Anne M.; Schleicher, Christine C.] Naval Surface Warfare Ctr, Carderock Div, West Bethesda, MD USA.
RP Fu, TC (reprint author), Naval Surface Warfare Ctr, Carderock Div, West Bethesda, MD USA.
NR 11
TC 0
Z9 0
U1 1
U2 2
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4491-5
PY 2012
BP 333
EP 340
PG 8
WC Engineering, Ocean; Engineering, Mechanical
SC Engineering
GA BGZ17
UT WOS:000324655900039
ER
PT B
AU Bandyopadhyay, PR
Fredette, AR
Hansen, JC
AF Bandyopadhyay, Promode R.
Fredette, Albert R.
Hansen, Joshua C.
GP ASME
TI INTERACTION OF BOUNDARY LAYER AND BLADE VIBRATION AT ULTRA-LOW ADVANCE
RATIOS AND LOW REYNOLDS NUMBERS IN A NOVEL FLAPPING AND SPINNING
PROPULSOR
SO PROCEEDINGS OF THE ASME 31ST INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE
AND ARCTIC ENGINEERING, 2012, VOL 4
LA English
DT Proceedings Paper
CT 31st ASME International Conference on Ocean, Offshore and Arctic
Engineering
CY JUL 01-06, 2012
CL Rio de Janeiro, BRAZIL
SP Petrobras, ASME, Ocean Offshore & Arct Engn Div
AB The nonlinear thrust properties of a small, near-hovering, conventional-looking propulsor are examined. When the propulsive power versus displacement of large and small manmade underwater vehicles is compared against that of large and small fish (distinguishing their red and white muscle distributions), universal trends are observed for cruising and maneuvering irrespective of size. While there is an overlap in the low displacement range of 0.1 to 1 m(3), manmade propulsors have rotating blades that are fixed, but animals use flapping pectoral fins. With this cue, a small and novel propulsor has been built where the fins/blades can both flap and spin. The blade pitch can also be varied, allowing the production of reverse thrust. The nondimensional parameter range of thrust production in both the flapping and spinning modes is determined. When the advance ratio (J) and Reynolds number (Re-c) are ultra-low in the spinning mode, the blade boundary layer couples with small pitch oscillations, and a bimodal behavior ensues. Boundary layer fence and rough blade surfaces shift the behavior to higher effective pitch angles, but the bi-modal behavior persists. A quasi-steady thrust modeling is carried out of the spin mode when the boundary layer couples with the inadvertent small pitch oscillation and when it does not. Temporal modeling indicates that, at ultra-low values of J and Re, the boundary layer and blade vibration interaction can be described as a Lienard (nonlinear) oscillator. The potential mechanism of interaction between blade vibration and rotation, and of their modeling, is discussed.
C1 [Bandyopadhyay, Promode R.; Fredette, Albert R.; Hansen, Joshua C.] Naval Undersea Warfare Ctr, Newport, RI USA.
RP Bandyopadhyay, PR (reprint author), Naval Undersea Warfare Ctr, Newport, RI USA.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4491-5
PY 2012
BP 623
EP 630
PG 8
WC Engineering, Ocean; Engineering, Mechanical
SC Engineering
GA BGZ17
UT WOS:000324655900067
ER
PT B
AU Jiang, M
Lien, V
Lesar, D
Engle, A
Lewis, R
AF Jiang, Minyee
Lien, Van
Lesar, Douglas
Engle, Allen
Lewis, Richard
GP ASME
TI A Validation of Various Codes Using Hydrodynamic Wedge Impact Data
SO PROCEEDINGS OF THE ASME 31ST INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE
AND ARCTIC ENGINEERING, 2012, VOL 4
LA English
DT Proceedings Paper
CT 31st ASME International Conference on Ocean, Offshore and Arctic
Engineering
CY JUL 01-06, 2012
CL Rio de Janeiro, BRAZIL
SP Petrobras, ASME, Ocean Offshore & Arct Engn Div
AB It is well known that slamming and whipping can significantly contribute to a ship's structural loading which can severely impact a ship's operational safety. Therefore, a method of predicting severe transient structural loads is needed, especially for the design of future high-speed patrol boats and high-speed ferries. A number of computational fluid dynamics (CFD) codes have demonstrated the ability to cope with complex body shapes and to numerically capture the nonlinear effect of hydro-elasticity. However, validation is scarce both due to a lack of experimental data and the computational intensity of the problem.
This paper describes a validation study of a Reynolds averaged Navier-Stokes (RANS) code (STAR-CCM+) and a Lagrangian-Eulerian fluid structure interaction (FSI) code (DYSMAS) using 10 degree wedge drop test experimental data obtained at the Naval Warfare Center, Carderock Division, December 2010.
C1 [Jiang, Minyee] US Navy, Hydromech Dept, Naval Surface Warfare Ctr, Carderock Div NSWCCD, West Bethesda, MD USA.
RP Jiang, M (reprint author), US Navy, Hydromech Dept, Naval Surface Warfare Ctr, Carderock Div NSWCCD, West Bethesda, MD USA.
NR 11
TC 1
Z9 1
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4491-5
PY 2012
BP 743
EP 752
PG 10
WC Engineering, Ocean; Engineering, Mechanical
SC Engineering
GA BGZ17
UT WOS:000324655900080
ER
PT B
AU Minnick, L
Bassler, C
Percival, S
AF Minnick, Lisa
Bassler, Christopher
Percival, Scott
GP ASME
TI ANALYSIS OF THE PHYSICS OF BILGE KEEL VORTEX GENERATION
SO PROCEEDINGS OF THE ASME 31ST INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE
AND ARCTIC ENGINEERING, 2012, VOL 4
LA English
DT Proceedings Paper
CT 31st ASME International Conference on Ocean, Offshore and Arctic
Engineering
CY JUL 01-06, 2012
CL Rio de Janeiro, BRAZIL
SP Petrobras, ASME, Ocean Offshore & Arct Engn Div
ID ROLL
AB A 2D forced roll oscillation experiment was performed to examine and characterize the physics of vortex generation from ship bilge keels. Measurements included ship model motions, normal force on the bilge keels, and flow field visualizations using Particle Image Velocimetry (PIV). Data was collected for a range of roll oscillation amplitudes, including large amplitudes where the bilge keels interacted with the free surface and for three roll oscillation frequencies.
This paper presents analysis and description of the observed phenomena, and examines whether a functional relationship can be established between the force measured on the bilge keel and the flow field generated by the bilge keel. A qualitative discussion of the observed flow characteristics, including the vortex generation at the tip of the bilge keel, detachment, and interaction with the free-surface, is presented. In addition, the circulation in front and behind the bilge keel was calculated, analyzed, and compared to the measured bilge keel force. The analysis conducted was intended to provide improved understanding of the phenomena which occur during bilge keel vortex generation and aid in the development of improved roll damping and bilge keel force models for the prediction of ship motions.
C1 [Minnick, Lisa; Bassler, Christopher; Percival, Scott] Naval Surface Warfare Ctr, Carderock Div, West Bethesda, MD USA.
RP Minnick, L (reprint author), Naval Surface Warfare Ctr, Carderock Div, West Bethesda, MD USA.
NR 25
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4491-5
PY 2012
BP 761
EP 779
PG 19
WC Engineering, Ocean; Engineering, Mechanical
SC Engineering
GA BGZ17
UT WOS:000324655900082
ER
PT S
AU Lee, JS
Kelly, RG
AF Lee, J. S.
Kelly, R. G.
BE Kish, JR
Frankel, GS
Davenport, AJ
Birbilis, N
Zavadil, K
TI Factors Controlling the Location of Crevice Attack in Austenitic
Stainless Steels
SO CRITICAL FACTORS IN LOCALIZED CORROSION 7
SE ECS Transactions
LA English
DT Proceedings Paper
CT 7th Symposium on Critical Factors in Localized Corrosion held during the
220th Electrochemical-Society (ECS) Meeting
CY OCT 10-13, 2011
CL Boston, MA
SP Electrochem Soc, Corros Div, Bio-Logic
ID CORROSION; ELECTRODE; ALLOYS; NI
AB Microfabrication techniques and computational modeling were employed to examine the factors controlling the spatial distribution of crevice corrosion of 316L stainless steel in ferric chloride environments. Crevice fabrication consisted of a structural material surrounding a sacrificial material, the latter of which was selectively etched to form a rigorously defined hollow structure over the 316L substrate. For crevice gaps below 3 microns, the site of greatest attack down the crevice length was independent of gap size. A multivariable surface was used to model the variations in the electrochemical boundary condition as a function of chloride concentration. Modeling results predicted the location of greatest attack and that neither ohmic drop nor chemistry change models are suitable for austenitic stainless in acidic chloride environments. Instead, results showed that a chemistry dependent potential-current behavior is the factor that controls the spatial distribution of crevice corrosion attack in this system.
C1 [Lee, J. S.] Naval Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Lee, JS (reprint author), Naval Res Lab, Stennis Space Ctr, MS 39529 USA.
NR 23
TC 0
Z9 0
U1 1
U2 2
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-324-7; 978-1-56677-965-4
J9 ECS TRANSACTIONS
PY 2012
VL 41
IS 25
BP 17
EP 29
DI 10.1149/1.3697574
PG 13
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA BHG95
UT WOS:000325392600002
ER
PT S
AU Natishan, PM
O'Grady, WE
Martin, FJ
Rayne, RJ
Kahn, H
Heuer, AH
AF Natishan, P. M.
O'Grady, W. E.
Martin, F. J.
Rayne, R. J.
Kahn, H.
Heuer, A. H.
BE Kish, JR
Frankel, GS
Davenport, AJ
Birbilis, N
Zavadil, K
TI The Effect of Chloride on Passive Oxide Film Breakdown on Stainless
Steels and Aluminum
SO CRITICAL FACTORS IN LOCALIZED CORROSION 7
SE ECS Transactions
LA English
DT Proceedings Paper
CT 7th Symposium on Critical Factors in Localized Corrosion held during the
220th Electrochemical-Society (ECS) Meeting
CY OCT 10-13, 2011
CL Boston, MA
SP Electrochem Soc, Corros Div, Bio-Logic
ID X-RAY PHOTOELECTRON; PITTING CORROSION; FE-26CR ALLOY; AES ANALYSIS;
XPS; SPECTROSCOPY; SIMS; ION; METALS; MODEL
AB The evidence for adsorption or incorporation of chloride ions (Cl-) in the passive oxide film on stainless steels and Fe-Cr alloys appears to be contradictory, with some investigators reporting Cl- in the oxide and others reporting its absence. We consider this issue by determining Cl- adsorption and/or incorporation as a function of potential (below the pitting potential) on 316L stainless steel using Xray photoelectron spectroscopy and compare our results to the literature on uptake of Cl- by stainless steels and to studies on uptake of Cl- on aluminum. The important finding is that no Cl- is observed in the oxide film on 316L stainless steel whereas in the case of aluminum, Cl- is incorporated into the oxide film. We present the case for those instances where Cl- is observed in the oxide films on stainless steels and Fe-Cr alloys, these observations are a result of the experimental procedures employed.
C1 [Natishan, P. M.; O'Grady, W. E.; Martin, F. J.] Naval Res Lab, Div Chem, Washington, DC USA.
RP Natishan, PM (reprint author), Naval Res Lab, Div Chem, Washington, DC USA.
NR 35
TC 2
Z9 2
U1 2
U2 10
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-324-7; 978-1-56677-965-4
J9 ECS TRANSACTIONS
PY 2012
VL 41
IS 25
BP 49
EP 57
DI 10.1149/1.3697577
PG 9
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA BHG95
UT WOS:000325392600005
ER
PT S
AU Tailleart, NR
Martin, FJ
Rayne, RJ
Kahn, H
Heuer, AH
Natishan, PM
AF Tailleart, N. R.
Martin, F. J.
Rayne, R. J.
Kahn, H.
Heuer, A. H.
Natishan, P. M.
BE Kish, JR
Frankel, GS
Davenport, AJ
Birbilis, N
Zavadil, K
TI Passive Film Observations on Interstitially Hardened 316L Stainless
Steel with Nitrogen for Improved Corrosion Resistance
SO CRITICAL FACTORS IN LOCALIZED CORROSION 7
SE ECS Transactions
LA English
DT Proceedings Paper
CT 7th Symposium on Critical Factors in Localized Corrosion held during the
220th Electrochemical-Society (ECS) Meeting
CY OCT 10-13, 2011
CL Boston, MA
SP Electrochem Soc, Corros Div, Bio-Logic
ID CREVICE CORROSION; CARBON SUPERSATURATION; NATURAL SEAWATER;
CARBURIZATION; ALLOY-625; XPS
AB A low temperature (420 degrees C and below), plasma-based interstitial hardening (IH) with nitrogen process on 316L austenitic stainless steels (UNS S31603) was investigated. The IH-treatment significantly improved the hardness and wear resistance for all treatment temperatures. The pitting and crevice corrosion resistance of IH-N samples treated at 370 and 395 degrees C in 0.6 M NaCl solutions was improved compared to untreated samples. XPS analysis after crevice corrosion experiments indicated that no chloride was incorporated into the passive film and a TOF-SIMS experiment showed that the IH-N surface are less reactive to oxygen than untreated 316 stainless steel.
C1 [Tailleart, N. R.] NRL, Washington, DC 20036 USA.
RP Tailleart, NR (reprint author), NRL, Washington, DC 20036 USA.
NR 18
TC 0
Z9 0
U1 4
U2 11
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-324-7; 978-1-56677-965-4
J9 ECS TRANSACTIONS
PY 2012
VL 41
IS 25
BP 59
EP 66
DI 10.1149/1.3697578
PG 8
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA BHG95
UT WOS:000325392600006
ER
PT S
AU Lee, YT
Cooper, P
AF Lee, Yu-Tai
Cooper, Paul
GP ASME
TI A MULTI-OBJECTIVE OPTIMIZATION FOR A CENTRIFUGAL FAN IMPELLER
SO PROCEEDINGS OF THE ASME FLUIDS ENGINEERING DIVISION SUMMER MEETING,
2012, VOL 1, PTS A AND B, SYMPOSIA
SE ASME Fluids Engineering Division Summer Meeting
LA English
DT Proceedings Paper
CT ASME Fluids Engineering Division Summer Meeting (FEDSM)
CY JUL 08-12, 2012
CL Rio Grande, PR
SP ASME, Fluids Engn Div
ID DESIGN
AB A reduced-order flow analysis method is developed to predict impeller flow field and impeller performance characteristics for a high-specific-speed centrifugal fan attached with a double-discharge volute. The method is validated by comparing its performance prediction for a baseline fan with measurements. The flow analysis calculation not only predicts impeller flow field, but also generates impeller configurations based on given impeller design parameters. A multi-objective genetic algorithm is also developed and coupled with the reduced-order flow analysis to perform a direct online search of the nominal (deterministic) optimum impeller design envelope. An existing fan serving as the baseline fan was reverse engineered to regenerate its geometry using the current method. The optimization calculations were used to explore design variables including blade inlet and outlet angles, shroud angle and blade leading-edge span as 2, 3 and 4-variable design calculations. The 2-variable prediction concludes that the fan is limited in its performance improvement if only the blade shape is changed, which agrees with early CFD prediction results of the baseline fan. Comparing 3 and 4-variable predictions with the 2-variable predictions, larger ranges of improvement in fan performance are feasible by only considering fan aerodynamics. Furthermore the conflicting nature of design variables with regard to the fan performance improvement is also demonstrated by the prediction results.
C1 [Lee, Yu-Tai] Naval Surface Warfare Ctr, Carderock Div, West Bethesda, MD USA.
RP Lee, YT (reprint author), Naval Surface Warfare Ctr, Carderock Div, West Bethesda, MD USA.
EM yu.lee@navy.mil; paul.cooper@verizon.net
NR 17
TC 1
Z9 1
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
SN 1093-4928
BN 978-0-7918-4475-5
J9 ASME FLUID ENG DIV
PY 2012
BP 153
EP 165
PG 13
WC Engineering, Mechanical; Transportation Science & Technology
SC Engineering; Transportation
GA BGX48
UT WOS:000324506700016
ER
PT J
AU Tsurutani, BT
Verkhoglyadova, OP
Mannucci, AJ
Lakhina, GS
Huba, JD
AF Tsurutani, Bruce T.
Verkhoglyadova, Olga P.
Mannucci, Anthony J.
Lakhina, Gurbax S.
Huba, Joseph D.
TI Extreme changes in the dayside ionosphere during a Carrington-type
magnetic storm
SO JOURNAL OF SPACE WEATHER AND SPACE CLIMATE
LA English
DT Article
DE ionosphere (equatorial); ionosphere (mid latitude); electric field;
coronal mass ejection (CME); flares
ID LOW-LATITUDE IONOSPHERE; ELECTRIC-FIELDS; PENETRATION; SYSTEM; ORIGIN;
SECTOR; MODEL; SAMI2
AB It is shown that during the 30 October 2003 superstorm, dayside O+ ions were uplifted to DMSP altitudes (similar to 850 km). Peak densities were similar to 9 x 10(5) cm(-3) during the magnetic storm main phase (peak Dst = -390 nT). By comparison the 1-2 September 1859 Carrington magnetic storm (peak Dst estimated at -1760 nT) was considerably stronger. We investigate the impact of this storm on the low- to mid-latitude ionosphere using a modified version of the NRL SAMI2 ionospheric code. It is found that the equatorial region (LAT = 0 degrees +/- 15 degrees) is swept free of plasma within 15 min (or less) of storm onset. The plasma is swept to higher altitudes and higher latitudes due to E x B convection associated with the prompt penetration electric field. Equatorial Ionization Anomaly (EIA) O+ density enhancements are found to be located within the broad range of latitudes similar to +/- (25 degrees-40 degrees) at similar to 500-900 km altitudes. Densities within these peaks are similar to 6 x 10(6) oxygen ions-cm(-3) at similar to 700 km altitude, approximately +600% quiet time values. The oxygen ions at the top portions (850-1000 km) of uplifted EIAs will cause strong low-altitude satellite drag. Calculations are currently being performed on possible uplift of oxygen neutrals by ion-neutral coupling to understand if there might be further significant satellite drag forces present.
C1 [Tsurutani, Bruce T.; Verkhoglyadova, Olga P.; Mannucci, Anthony J.] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
[Verkhoglyadova, Olga P.] Univ Alabama, CSPAR, Huntsville, AL 35899 USA.
[Lakhina, Gurbax S.] Indian Inst Geomagnetism, Navi Mumbai, Maharashtra, India.
[Huba, Joseph D.] Naval Res Lab, Washington, DC USA.
RP Tsurutani, BT (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
EM bruce.tsurutani@jpl.nasa.gov
OI Lakhina, Gurbax /0000-0002-8956-486X; Verkhoglyadova,
Olga/0000-0002-9295-9539
FU NASA; Indian National Science Academy, New Delhi; NRL 6.1 Base Funds
FX Portions of this research effort were performed at the Jet Propulsion
Laboratory, California Institute of Technology under contract with the
NASA. GSL thanks the Indian National Science Academy, New Delhi for
support under the Senior Scientist Scheme. JDH thanks NRL 6.1 Base Funds
for support of this research. We gratefully acknowledge the Center for
Space Sciences at the University of Texas at Dallas and the U. S. Air
Force for providing the DMSP thermal plasma data.
NR 39
TC 12
Z9 12
U1 0
U2 5
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 2115-7251
J9 J SPACE WEATHER SPAC
JI J. Space Weather Space Clim.
PY 2012
VL 2
AR UNSP A05
DI 10.1051/swsc/2012004
PG 7
WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology &
Atmospheric Sciences
GA 226AY
UT WOS:000325007800005
ER
PT B
AU Michopoulos, J
Sriram, R
AF Michopoulos, John
Sriram, Ram
GP ASME
TI 31ST COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE (CIE)
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2011, VOL 2, PTS A AND B
LA English
DT Proceedings Paper
CT ASME Internationl Design Engineering Technical Conferences / Computers
and Information in Engineering Conference (IDETC/CIE)
CY AUG 28-31, 2011
CL Washington, DC
SP Amer Soc Mech Engineers, Design Engn Div, Amer Soc Mech Engineers, Comp & Informat Engn Div
C1 [Michopoulos, John] Naval Res Lab, Washington, DC 20375 USA.
RP Michopoulos, J (reprint author), Naval Res Lab, Washington, DC 20375 USA.
RI Michopoulos, John/D-6704-2016
OI Michopoulos, John/0000-0001-7004-6838
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5479-2
PY 2012
BP 1
EP 2
PG 2
WC Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Mechanical
SC Computer Science; Engineering
GA BGU92
UT WOS:000324221200001
ER
PT B
AU Wimmer, SA
Pan, MJ
AF Wimmer, Stephanie A.
Pan, Ming-Jen
GP ASME
TI COMPUTATIONAL MODELING OF FUGITIVE PHASE ROTATIONS WITHIN TAPE CAST
CERAMICS
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2011, VOL 2, PTS A AND B
LA English
DT Proceedings Paper
CT ASME Internationl Design Engineering Technical Conferences / Computers
and Information in Engineering Conference (IDETC/CIE)
CY AUG 28-31, 2011
CL Washington, DC
SP Amer Soc Mech Engineers, Design Engn Div, Amer Soc Mech Engineers, Comp & Informat Engn Div
AB For complex ceramic parts, new fabrication methods, such as the fugitive phase approach, are required. A common problem in the creation of ceramic parts is obtaining accurate dimensions of the final part. The sintering process makes it very difficult to create precise complex geometries. Tolerances achieved with green ceramics do not carry over to acceptable tolerances on the finished part due to non-uniform shrinkage and warping. The authors are investigating the application of the fugitive phase processing method, which might be able to fabricate topologically complex monolithic ceramic parts with precise tolerances. This paper is a continuation of previous work and examines the lamination step of the fugitive phase approach ceramic fabrication process; the step in which the fugitive phase material is integrated with the green ceramic material. In this step, the pressing along with the geometric layout of the fugitive phase material create an uneven pressure distribution in the green ceramic. Of particular concern is the rotation of the fugitive phase materials during the lamination step. A computational model of the lamination process is used to examine how the plasticity of the fugitive phase material along with computational boundary conditions affect the geometry of the green ceramic produced at the end of the lamination step prior to sintering. The resulting stress, strain energy, and deformed shapes are examined and compared. This information will be used to adjust the experimental investigations of the fugitive phase approach ceramic fabrication process that is working to create topologically complex ceramic components.
C1 [Wimmer, Stephanie A.; Pan, Ming-Jen] Naval Res Lab, Washington, DC 20375 USA.
RP Wimmer, SA (reprint author), Naval Res Lab, Washington, DC 20375 USA.
NR 9
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5479-2
PY 2012
BP 23
EP 29
PG 7
WC Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Mechanical
SC Computer Science; Engineering
GA BGU92
UT WOS:000324221200004
ER
PT B
AU Huang, LL
Shabaev, A
Lambrakos, SG
Bernstein, N
Jacobs, VL
Finkenstadt, D
Massa, L
AF Huang, Lulu
Shabaev, Andrew
Lambrakos, Samuel G.
Bernstein, Noam
Jacobs, Verne L.
Finkenstadt, Daniel
Massa, Lou
GP ASME
TI DIELECTRIC RESPONSE OF beta-HMX AT THZ FREQUENCIES CALCULATED BY DENSITY
FUNCTIONAL THEORY
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2011, VOL 2, PTS A AND B
LA English
DT Proceedings Paper
CT ASME International Design Engineering Technical Conferences / Computers
and Information in Engineering Conference (IDETC/CIE)
CY AUG 28-31, 2011
CL Washington, DC
SP Amer Soc Mech Engineers, Design Engn Div, Amer Soc Mech Engineers, Comp & Informat Engn Div
ID GAUSSIAN-BASIS SETS
AB We present calculations of ground state resonance structure associated with the high explosives beta-HMX using density functional theory (DFT), which is for the construction of parameterized dielectric response functions for excitation by electromagnetic waves at compatible frequencies. These dielectric functions provide for different types of analyses concerning the dielectric response of explosives. In particular, these dielectric response functions provide quantitative initial estimates of spectral response features for subsequent adjustment with respect to additional information such as laboratory measurements and other types of theory based calculations. With respect to qualitative analysis, these spectra provide for the molecular level interpretation of response structure. The DFT software GAUSSIAN was used for the calculations of ground state resonance structure presented here.
C1 [Huang, Lulu; Lambrakos, Samuel G.; Bernstein, Noam; Jacobs, Verne L.] Naval Res Lab, Washington, DC 20375 USA.
RP Huang, LL (reprint author), Naval Res Lab, Washington, DC 20375 USA.
NR 16
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5479-2
PY 2012
BP 83
EP 89
PG 7
WC Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Mechanical
SC Computer Science; Engineering
GA BGU92
UT WOS:000324221200011
ER
PT B
AU Wimmer, SA
DeGiorgi, VG
AF Wimmer, Stephanie A.
DeGiorgi, Virginia G.
GP ASME
TI INITIAL MODELING OF MATERIAL PHASE DRIVEN LOCALIZED CORROSION
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2011, VOL 2, PTS A AND B
LA English
DT Proceedings Paper
CT ASME Internationl Design Engineering Technical Conferences / Computers
and Information in Engineering Conference (IDETC/CIE)
CY AUG 28-31, 2011
CL Washington, DC
SP Amer Soc Mech Engineers, Design Engn Div, Amer Soc Mech Engineers, Comp & Informat Engn Div
AB Localized corrosion often occurs when regions of a single material demonstrate a difference in electrochemical potential. Cathodic and anodic regions can develop in a component comprised of a single material. This variation is one cause of localized corrosion damage. This phenomenon of localized anode and cathode regions is well documented but not well understood. In this work the authors are examining variations in electrochemical response of individual grains within a metallic material. The objective is to determine if the distinct electrochemical response associated with austenite and ferrite phases in steel are sufficient to create a localized electrochemical corrosion cell. In this paper the authors present the first of a series of models that capture localized electrochemical corrosion driven by variations in grain polarization response.
C1 [Wimmer, Stephanie A.; DeGiorgi, Virginia G.] Naval Res Lab, Washington, DC 20375 USA.
RP Wimmer, SA (reprint author), Naval Res Lab, Washington, DC 20375 USA.
NR 2
TC 0
Z9 0
U1 0
U2 2
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5479-2
PY 2012
BP 155
EP 160
PG 6
WC Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Mechanical
SC Computer Science; Engineering
GA BGU92
UT WOS:000324221200018
ER
PT B
AU DeGiorgi, VG
Wimmer, SA
AF DeGiorgi, Virginia G.
Wimmer, Stephanie A.
GP ASME
TI REVIEW OF SENSITIVITY STUDIES FOR IMPRESSED CURRENT CATHODIC PROTECTION
SYSTEMS
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2011, VOL 2, PTS A AND B
LA English
DT Proceedings Paper
CT ASME Internationl Design Engineering Technical Conferences / Computers
and Information in Engineering Conference (IDETC/CIE)
CY AUG 28-31, 2011
CL Washington, DC
SP Amer Soc Mech Engineers, Design Engn Div, Amer Soc Mech Engineers, Comp & Informat Engn Div
ID DESIGN
AB The Naval Research Laboratory has conducted investigations into the computational simulations of shipboard cathodic protection systems for several decades providing a scientific basis for the application of computational modeling to corrosion and signature systems. This work has expanded to other facilities and organizations, several of which are commercial in nature. However, much of the individual sensitivity studies which have led to an increased understanding of the behavior of cathodic protection systems have not had a high visibility. In this paper the authors review selected critical studies with notes towards future work. Because of their impact on modeling accuracy and means of defining components the authors have selected variations in electrolyte conductivity, damage modeling approaches, material characterization and paint characterization for review.
C1 [DeGiorgi, Virginia G.; Wimmer, Stephanie A.] Naval Res Lab, Washington, DC 20375 USA.
RP DeGiorgi, VG (reprint author), Naval Res Lab, Code 6353,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM virginia.degiorgi@nrl.navy.mil; stephanie.wimmer@nrl.navy.mil
NR 19
TC 0
Z9 0
U1 1
U2 2
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5479-2
PY 2012
BP 181
EP 190
PG 10
WC Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Mechanical
SC Computer Science; Engineering
GA BGU92
UT WOS:000324221200021
ER
PT B
AU Michopoulos, JG
Iliopoulos, A
AF Michopoulos, John G.
Iliopoulos, Athanasios
GP ASME
TI SYMBOLIC ALGEBRA AND THEOREM PROVING FOR FAILURE CRITERIA REDUCTION
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2011, VOL 2, PTS A AND B
LA English
DT Proceedings Paper
CT ASME Internationl Design Engineering Technical Conferences / Computers
and Information in Engineering Conference (IDETC/CIE)
CY AUG 28-31, 2011
CL Washington, DC
SP Amer Soc Mech Engineers, Design Engn Div, Amer Soc Mech Engineers, Comp & Informat Engn Div
ID UNIFIED PROCEDURE; DEFORMABLE MEDIA; QUANTIFIER ELIMINATION;
CONSTRUCTION; STRENGTH; CONTINUA
AB The present paper reports on recent efforts of utilizing symbolic computing for identifying failure criteria cross reducibility from the perspective of theorem proving. Utilizing equational theorem proving algorithms and Grobner Basis polynomial theorem provers implemented in Mathematica we have proven a number of interesting theorems related to the area of structural failure criteria for anisotropic and particularly orthotropic materials. The main contribution of this work is the demonstration of the tremendous utility of symbolic algebra for engineering applications as well as the demonstration of the idea that all failure criteria presented in the literature up to know can be proven under certain conditions to be special forms of general criteria relating to the strain energy density function associated with material continua. Two specific examples are presented and discussed along with a theorem proving the existence of a dual form of all stress space based criteria to equivalent one expressed in strain space.
C1 [Michopoulos, John G.] Naval Res Lab, Computat Multiphys Syst Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
RP Michopoulos, JG (reprint author), Naval Res Lab, Computat Multiphys Syst Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
RI Michopoulos, John/D-6704-2016
OI Michopoulos, John/0000-0001-7004-6838
NR 44
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5479-2
PY 2012
BP 201
EP 211
PG 11
WC Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Mechanical
SC Computer Science; Engineering
GA BGU92
UT WOS:000324221200023
ER
PT B
AU Michopoulos, JG
Lambrakos, S
Iliopoulos, A
AF Michopoulos, John G.
Lambrakos, Samuel
Iliopoulos, Athanasios
GP ASME
TI FRICTION STIR WELDING PROCESS PARAMETER EFFECTS ON WORKPIECE WARPAGE DUE
TO RESIDUAL STRAINS
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2011, VOL 2, PTS A AND B
LA English
DT Proceedings Paper
CT ASME International Design Engineering Technical Conferences / Computers
and Information in Engineering Conference (IDETC/CIE)
CY AUG 28-31, 2011
CL Washington, DC
SP Amer Soc Mech Engineers, Design Engn Div, Amer Soc Mech Engineers, Comp & Informat Engn Div
ID ALUMINUM-ALLOY 6061-T6; NUMERICAL-SIMULATION; HEAT-TRANSFER; STRESSES;
MODEL; OPTIMIZATION; ZONE
AB An important performance measure of the quality of a weld is the permanent deformation developed during welding processes due to the thermally activated residual strains. This paper presents the results of a sensitivity analysis that determines the effects of processing parameters -such as the speed of rotation and the traveling speed of a rotating friction stir welding (FSW) tool- on the resulting residual strain fields. The problem has been modeled as a thermostructurally coupled problem via Finite Element Analysis of an elastoplastic workpiece under the influence of heat generated from the stirring process and taking into account the temperature dependent yield strength of the material. Results are presented and discussed in the context of our future plans.
C1 [Michopoulos, John G.; Lambrakos, Samuel] Naval Res Lab, Computat Multiphys Syst Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
RP Michopoulos, JG (reprint author), Naval Res Lab, Computat Multiphys Syst Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
RI Michopoulos, John/D-6704-2016
OI Michopoulos, John/0000-0001-7004-6838
NR 59
TC 0
Z9 0
U1 1
U2 3
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5479-2
PY 2012
BP 233
EP 240
PG 8
WC Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Mechanical
SC Computer Science; Engineering
GA BGU92
UT WOS:000324221200026
ER
PT B
AU Iliopoulos, A
Michopoulos, JG
AF Iliopoulos, Athanasios
Michopoulos, John G.
GP ASME
TI uBlasCL: ARCHITECTURE AGNOSTIC MASSIVELY PARALLEL LINEAR ALGEBRA SYSTEM
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2011, VOL 2, PTS A AND B
LA English
DT Proceedings Paper
CT ASME Internationl Design Engineering Technical Conferences / Computers
and Information in Engineering Conference (IDETC/CIE)
CY AUG 28-31, 2011
CL Washington, DC
SP Amer Soc Mech Engineers, Design Engn Div, Amer Soc Mech Engineers, Comp & Informat Engn Div
AB The need for more efficient, more abstract and easier to use parallel programming interfaces has been recently intensified with the introduction and remarkable evolution of technologies such as the General Purpose Graphics Processing Units (GPG-PUs) and multi-core Central Processing Units (CPUs). In the present paper we present the introduction of the uBlasCL system as a Domain Specific Embedded Language within C++ that implements a Basic Linear Algebra Interface for OpenCL. The system is architecture agnostic, in the sense that it can be programmed independently of the targeted architecture, is massively parallel, and achieves efficiency that tracks well the increase in hardware performance advances. Our effort is based on the utilization of template metaprogramming and domain specific languages fundamentals, for developing a system that has the syntactic flexibility of a symbolic term processing system for expressing mathematics, and the semantic and executional power to exploit the parallelism offered by the hardware in an automated, transparent to the user and efficiently mapped on the hardware manner We also describe its relation to C++, template programming, domain specific languages and OpenCL. In the effort to develop uBlasCL we also developed a middleware library named CL++, as a convenient C++ interface to OpenCL. After the architectural and the implementation descriptions of the system, we present performance testing results demonstrating its potential power
C1 [Iliopoulos, Athanasios] Naval Res Lab, Sci Applicat Int Corp, Washington, DC 20375 USA.
RP Iliopoulos, A (reprint author), Naval Res Lab, Sci Applicat Int Corp, Washington, DC 20375 USA.
RI Michopoulos, John/D-6704-2016
OI Michopoulos, John/0000-0001-7004-6838
NR 22
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5479-2
PY 2012
BP 357
EP 370
PG 14
WC Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Mechanical
SC Computer Science; Engineering
GA BGU92
UT WOS:000324221200040
ER
PT B
AU Michopoulos, JG
Iliopoulos, A
AF Michopoulos, John G.
Iliopoulos, Athanasios
GP ASME
TI COMPLETE HIGH DIMENSIONAL INVERSE CHARACTERIZATION OF FRACTAL SURFACES
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2011, VOL 2, PTS A AND B
LA English
DT Proceedings Paper
CT ASME Internationl Design Engineering Technical Conferences / Computers
and Information in Engineering Conference (IDETC/CIE)
CY AUG 28-31, 2011
CL Washington, DC
SP Amer Soc Mech Engineers, Design Engn Div, Amer Soc Mech Engineers, Comp & Informat Engn Div
ID INTERFACIAL TEMPERATURE DISTRIBUTION; WEIERSTRASS-MANDELBROT FUNCTION;
ELASTIC-PLASTIC CONTACT; SLOW SLIDING REGIME; ROUGH SURFACES; MULTISCALE
ROUGHNESS; PROFILES; SIMULATION; MODELS
AB The present paper describes a methodology for the inverse identification of the complete set of parameters associated with the Weirstrass-Mandelbrot (W-M) function that can describe any rough surface known by its profilometric or topographic data. Our effort is motivated by the need to determine the mechanical, electrical and thermal properties of contact surfaces between deformable materials that conduct electricity and heat and require an analytical representation of the surfaces involved. Our method involves utilizing a refactoring of the W-M function that permits defining the characterization problem as a high dimensional singular value decomposition problem for the determination of the so-called phases of the function. Coupled with this process is a second level exhaustive search that enables the determination of the density of the frequencies involved in defining the trigonometric functions involved in the definition of the W-M function. Our approach proves that this is the only additional parameter that needs to be determined for full characterization of the W-M function as the rest can be selected arbitrarily. Numerical applications of the proposed method on both synthetic and actual elevation data, validate the efficiency and the accuracy of the proposed approach. This approach constitutes a radical departure from the traditional fractal dimension characterization studies and opens the road for a very large number of applications.
C1 [Michopoulos, John G.] Naval Res Lab, Computat Multiphys Syst Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
RP Michopoulos, JG (reprint author), Naval Res Lab, Computat Multiphys Syst Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
RI Michopoulos, John/D-6704-2016
OI Michopoulos, John/0000-0001-7004-6838
NR 30
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5479-2
PY 2012
BP 447
EP 456
PG 10
WC Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Mechanical
SC Computer Science; Engineering
GA BGU92
UT WOS:000324221200049
ER
PT B
AU Michopoulos, JG
Iliopoulos, A
AF Michopoulos, John G.
Iliopoulos, Athanasios
GP ASME
TI A COMPUTATIONAL WORKBENCH FOR REMOTE FULL FIELD 3D DISPLACEMENT AND
STRAIN MEASUREMENTS
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2011, VOL 2, PTS A AND B
LA English
DT Proceedings Paper
CT ASME Internationl Design Engineering Technical Conferences / Computers
and Information in Engineering Conference (IDETC/CIE)
CY AUG 28-31, 2011
CL Washington, DC
SP Amer Soc Mech Engineers, Design Engn Div, Amer Soc Mech Engineers, Comp & Informat Engn Div
AB The present paper reports on the progress towards the development of a computational workbench infrastructure that implements the Meshless Random Grid (MRG) method for the remote (non contact) measurement of displacement and strain fields in 3D space. The method is applicable to structures bounded by flat surfaces that deform under various mechanical and generalized loading conditions in and out of plane. A brief description of the 3D MRG method is followed by the description of the current prototype of a software workbench developed for the computational implementation of the algorithms involved with the analysis display and export of the experimental results associated with any specific applications of the method.
C1 [Michopoulos, John G.] Naval Res Lab, Ctr Computat Mat Sci, Computat Multiphys Syst Lab, Washington, DC 20375 USA.
RP Michopoulos, JG (reprint author), Naval Res Lab, Ctr Computat Mat Sci, Computat Multiphys Syst Lab, Washington, DC 20375 USA.
RI Michopoulos, John/D-6704-2016
OI Michopoulos, John/0000-0001-7004-6838
NR 29
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5479-2
PY 2012
BP 489
EP 498
PG 10
WC Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Mechanical
SC Computer Science; Engineering
GA BGU92
UT WOS:000324221200054
ER
PT B
AU Michopoulos, JG
Hermanson, JG
Iliopoulos, A
Lambrakos, S
Furukawa, T
AF Michopoulos, John G.
Hermanson, John G.
Iliopoulos, Athanasios
Lambrakos, Samuel
Furukawa, Tomonari
GP ASME
TI ON THE CONSTITUTIVE RESPONSE CHARACTERIZATION FOR COMPOSITE MATERIALS
VIA DATA-DRIVEN DESIGN OPTIMIZATION
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2011, VOL 2, PTS A AND B
LA English
DT Proceedings Paper
CT ASME Internationl Design Engineering Technical Conferences / Computers
and Information in Engineering Conference (IDETC/CIE)
CY AUG 28-31, 2011
CL Washington, DC
SP Amer Soc Mech Engineers, Design Engn Div, Amer Soc Mech Engineers, Comp & Informat Engn Div
ID VIRTUAL FIELDS METHOD; NEURAL-NETWORKS; ELASTIC CHARACTERIZATION;
MATERIAL IDENTIFICATION; ANISOTROPIC MATERIALS; MULTIAXIAL TESTS; MODEL;
DISPLACEMENT; STIFFNESSES; SENSITIVITY
AB In the present paper we focus on demonstrating the use of design optimization for the constitutive characterization of anisotropic material systems such as polymer matrix composites, with or without damage. All approaches are based on the availability of experimental data originating from mechatronic material testing systems that can expose specimens to multidimensional loading paths and can automate the acquisition of data representing the excitation and response behavior of the specimens involved. Material characterization is achieved by minimizing the difference between experimentally measured and analytically computed system responses as described by strain fields and surface strain energy densities. A one dimensional model is presented first to elucidate the design optimization for the general non-linear constitutive response. Small and large strain formulations based on strain energy density decompositions are developed and utilized for determining the constitutive behavior of composite materials. Examples based on both synthetic and actual data demonstrate the successful application of design optimization for constitutive characterization.
C1 [Michopoulos, John G.; Lambrakos, Samuel] Naval Res Lab, Ctr Computat Mat Sci, Computat Multiphys Syst Lab, Washington, DC 20375 USA.
RP Michopoulos, JG (reprint author), Naval Res Lab, Ctr Computat Mat Sci, Computat Multiphys Syst Lab, Washington, DC 20375 USA.
RI Michopoulos, John/D-6704-2016
OI Michopoulos, John/0000-0001-7004-6838
NR 61
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5479-2
PY 2012
BP 499
EP 511
PG 13
WC Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Mechanical
SC Computer Science; Engineering
GA BGU92
UT WOS:000324221200055
ER
PT B
AU Iliopoulos, A
Michopoulos, JG
Orifici, AC
Thomson, RS
AF Iliopoulos, Athanasios
Michopoulos, John G.
Orifici, Adrian C.
Thomson, Rodney S.
GP ASME
TI EXPERIMENTAL VALIDATION OF THE 2D MESHLESS RANDOM GRID METHOD
SO PROCEEDINGS OF THE ASME INTERNATIONAL DESIGN ENGINEERING TECHNICAL
CONFERENCES AND COMPUTERS AND INFORMATION IN ENGINEERING CONFERENCE,
2011, VOL 2, PTS A AND B
LA English
DT Proceedings Paper
CT ASME Internationl Design Engineering Technical Conferences / Computers
and Information in Engineering Conference (IDETC/CIE)
CY AUG 28-31, 2011
CL Washington, DC
SP Amer Soc Mech Engineers, Design Engn Div, Amer Soc Mech Engineers, Comp & Informat Engn Div
AB This paper presents the first systematic effort for the experimental validation of the 2D Meshless Random Grid Method (MRGM) for the frill field measurement of displacement and strain fields. Although the MRGM has been demonstrating very promising characteristics of accuracy, performance and ease of application based on previously conducted sensitivity analysis supported by virtual data, extensive experimental validation was not available until now This work comes to fill this gap and presents preliminary validation results against strain gauge data collected from open hole tension experiments of composite specimens. In addition, strain and displacement field verification is performed by comparison studies with finite element analysis results.
C1 [Iliopoulos, Athanasios] Sci Applicat Int Corp, Naval Res Lab, Washington, DC 20375 USA.
RP Iliopoulos, A (reprint author), Sci Applicat Int Corp, Naval Res Lab, Washington, DC 20375 USA.
RI Michopoulos, John/D-6704-2016
OI Michopoulos, John/0000-0001-7004-6838
NR 15
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5479-2
PY 2012
BP 513
EP 520
PG 8
WC Computer Science, Interdisciplinary Applications; Engineering,
Manufacturing; Engineering, Mechanical
SC Computer Science; Engineering
GA BGU92
UT WOS:000324221200056
ER
PT B
AU Caguiat, D
AF Caguiat, Daniel
GP ASME
TI GAS TURBINE PERFORMANCE AND ENERGY CONSERVATION ON DDG-51 CLASS US NAVY
SHIPS
SO PROCEEDINGS OF THE ASME TURBO EXPO 2012, VOL 5
LA English
DT Proceedings Paper
CT ASME Turbo Expo 2012
CY JUN 11-15, 2012
CL Copenhagen, DENMARK
SP Int Gas Turine Inst
AB On DDG-51 Class US Navy ships, maximum power and propulsion loads do not require all four main gas turbine engines nor all three electric generator engines to be operating simultaneously: U.S. Navy fleet guidance does not mandate a particular plant configuration at any given time. Therefore, the configuration being used on a given ship to support a particular mission is partially at the discretion of the ship's crew. This paper focuses on an effort to utilize real-time data from the ship's power and propulsion plants and auxiliary equipment to assess fuel efficiency and configuration options available, and suggest operating profiles conducive to energy savings. Current Phase I project deliverables, preliminary results, and potential way-forward topics are addressed.
C1 Naval Surface Warfare Ctr, Carderock Div, Philadelphia, PA USA.
RP Caguiat, D (reprint author), Naval Surface Warfare Ctr, Carderock Div, Philadelphia, PA USA.
NR 4
TC 0
Z9 0
U1 0
U2 6
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4471-7
PY 2012
BP 223
EP 233
PG 11
WC Engineering, Mechanical; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Engineering; Materials Science; Metallurgy & Metallurgical Engineering
GA BHC48
UT WOS:000324956100025
ER
PT B
AU Dick, A
Diamond, P
AF Dick, Adam
Diamond, Peter
GP ASME
TI REDESIGNING THE AUXILIARY POWER UNIT BLEED AIR VENTURI
SO PROCEEDINGS OF THE ASME TURBO EXPO 2012, VOL 5
LA English
DT Proceedings Paper
CT ASME Turbo Expo 2012
CY JUN 11-15, 2012
CL Copenhagen, DENMARK
SP Int Gas Turine Inst
DE T62T-40-7; APU; Landing Craft Air Cushion; Venturi Sizing Analysis; Air
Cushion Vehicles
AB This paper examines the analysis of redesigning the Auxiliary Power Unit (APU) bleed air spool piece used on the Landing Craft, Air Cushion (LCAC). The APU supplies bleed air for main engine (ME) starting, anti-icing of the propeller shrouds during cold weather conditions and anti-icing of the filtration system that supplies both ME compartment cooling air and the APU gas turbine combustion air. An air-blast cockpit windshield cleaning system is also powered by APU bleed air. A spool piece is a venturi whose function is to limit a specific amount of airflow as it passes through a system. The current spool piece venturi dimensions allow an excess in APU bleed air to on-craft components, resulting in an exhaust gas temperature (EGT) over-temp in the gas turbine power producer. Such operating conditions occur during cold weather testing, when port and starboard propeller shroud anti-ice systems and APU combustion air/main engine compartment cooling air anti-ice systems are operating. In order to rectify this issue, a model analysis was created, determining the proper dimension of the spool piece venturi. Because spool piece venturies have been implemented fleet wide, it was a priority to reduce fabrication expenses of new materials. To best achieve this, the analysis will determine the size of a plain venturi that can be installed within the existing spool pieces. Referring to engine specifications, APU bleed air was limited to a certain flow rate. However, anti-ice components also required a specific mass flow rate in order to operate properly. It is within these boundaries that the proper diameter of the venturi was determined. This issue further expands upon the analysis of thermal testing, inlet and outlet pressures and the mass flow rate of the new venturi dimension.
C1 [Dick, Adam; Diamond, Peter] Naval Surface Warfare Ctr, Carderock Div, Branch 935, Philadelphia, PA USA.
RP Dick, A (reprint author), Naval Surface Warfare Ctr, Carderock Div, Branch 935, Philadelphia, PA USA.
NR 2
TC 0
Z9 0
U1 1
U2 4
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4471-7
PY 2012
BP 265
EP 269
PG 5
WC Engineering, Mechanical; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Engineering; Materials Science; Metallurgy & Metallurgical Engineering
GA BHC48
UT WOS:000324956100029
ER
PT B
AU Shifler, DA
Aprigliano, LF
Groghan, D
AF Shifler, David A.
Aprigliano, Louis F.
Groghan, Dan
GP ASME
TI EVALUATING MATERIALS AND FUELS USING AN ATMOSPHERIC-PRESSURE
LOW-VELOCITY BURNER RIG: FACTORS TO CONSIDER TO AVOID UNINTENDED
CONSEQUENCES
SO PROCEEDINGS OF THE ASME TURBO EXPO 2012, VOL 5
LA English
DT Proceedings Paper
CT ASME Turbo Expo 2012
CY JUN 11-15, 2012
CL Copenhagen, DENMARK
SP Int Gas Turine Inst
ID HOT CORROSION; SODIUM; SULFIDATION; SUPERALLOYS; NICKEL; TESTS
AB The availability of petroleum-derived fuels is declining and the cost of petroleum can fluctuate wildly from $60 to $140 per barrel. These factors are causing a global desire to develop and use alternative fuels. While hydrogen, ethanol, and other non-hydrocarbon fuels are practical alternative fuels for the commercial sector, only liquid hydrocarbons meet the stringent needs of the military in terms of energy content, safety, handling and multi-platform use over the full range of operational conditions. Synthetic fuels will need to meet the current Naval petroleum-based physical, combustion, and chemistry specifications. Therefore, these fuels must be certified to meet Navy requirements and not have an adverse impact on current engine lives or performance.
It has been established that low-velocity, atmospheric-pressure burner rigs, when operated properly, simulate the corrosion and degradation of materials operating in Navy shipboard gas turbines. To evaluate new fuels to determine whether or not they will cause accelerated corrosion in a gas turbine, the corrosion of standard coated superalloys representative of materials in the hot section of gas turbines are exposed to the combustion gaseous products of the new fuels or fuel blends in the burner rig and compared to that of a standard Navy fuel. The control of parameters in all tests is critical if proper evaluation and interpretation is to be achieved. Failure to control the parameters leads to questions that could require more testing or deliver unsupportable, indeterminate conclusions. Two case studies will be presented on how these principles were used to conduct successful burner rig tests and how the learning from those cases were applied to make a decision as to how to conduct an alternate fuels test in a third case.
C1 [Shifler, David A.] Off Naval Res, Naval Mat Div, Arlington, VA 22217 USA.
RP Shifler, DA (reprint author), Off Naval Res, Naval Mat Div, Arlington, VA 22217 USA.
NR 46
TC 0
Z9 0
U1 2
U2 3
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4471-7
PY 2012
BP 305
EP 314
PG 10
WC Engineering, Mechanical; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Engineering; Materials Science; Metallurgy & Metallurgical Engineering
GA BHC48
UT WOS:000324956100033
ER
PT B
AU Quinones, M
Leung, R
Williams, S
AF Quinones, Martin
Leung, Richard
Williams, Sherry
GP ASME
TI ALGAE BASED HYDROPROCESSED FUEL USE ON A MARINE GAS TURBINE
SO PROCEEDINGS OF THE ASME TURBO EXPO 2012, VOL 5
LA English
DT Proceedings Paper
CT ASME Turbo Expo 2012
CY JUN 11-15, 2012
CL Copenhagen, DENMARK
SP Int Gas Turine Inst
AB The Naval Surface Warfare Center, Carderock Division (NSWCCD) Philadelphia conducted a full scale gas turbine engine test using Rolls Royce engine models 501-K34 and 250-KS4 to assess engine performance and fuel combustion characteristics of an algae based hydroprocessed fuel. The fuel, hereafter described as alternate fuel, consisted of a 50/50 blend of NATO F-76 fuel and the algae based formulation. It is the first time that the U.S. Navy uses a non-petroleum based fuel on a marine gas turbine. The test was conducted at the DDG 51 Land Based Engineering Site (LBES) of NSWCCD during 16-21 January 2011.
The alternate fuel test conducted on the 501-K34 engine consisted of 7 cycles of engine operation, one using NATO F-76 fuel to develop a baseline run and six cycles using alternate fuel. Each cycle was 7 hours, twenty minutes in duration and was composed of 27 distinct load scenarios. The total duration of the test was forty four hours. The 250-KS4 engine was used as the starter mechanism for the 501-K34 engine. During the test, parameters for combustion temperature, fuel demand, fuel manifold pressure, engine start time, and operation under various load conditions were recorded.
This paper discusses the results of the above test by comparing engine operation using alternate fuel to engine performance using NATO F-76 fuel.
C1 [Quinones, Martin] Naval Surface Warfare Ctr, Carderock Div, Philadelphia, PA USA.
RP Quinones, M (reprint author), Naval Surface Warfare Ctr, Carderock Div, Philadelphia, PA USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4471-7
PY 2012
BP 397
EP 407
PG 11
WC Engineering, Mechanical; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Engineering; Materials Science; Metallurgy & Metallurgical Engineering
GA BHC48
UT WOS:000324956100043
ER
PT B
AU Kelly, MM
Pan, MJ
Atre, S
Rancourt, G
Heyes, A
Vick, MJ
AF Kelly, Matthew M.
Pan, Ming-Jen
Atre, Sundar
Rancourt, Gregory
Heyes, Andrew
Vick, Michael J.
GP ASME
TI CERAMIC MICRO CHANNEL RECUPERATOR FABRICATION METHODS FOR SMALL GAS
TURBINE ENGINES
SO PROCEEDINGS OF THE ASME TURBO EXPO 2012, VOL 5
LA English
DT Proceedings Paper
CT ASME Turbo Expo 2012
CY JUN 11-15, 2012
CL Copenhagen, DENMARK
SP Int Gas Turine Inst
AB Recuperators can greatly improve the fuel efficiency of gas turbine engines, but they are normally heavy, bulky, expensive, and susceptible to high temperature creep, oxidation, and thermal stresses. One way to alleviate these problems is to make them from ceramic materials rather than metal alloys. However, fabricating these complex structures is a challenge. The technique investigated in this study was to laser-cut thin sheets of tapecast material into complex patterns, laminate them together into stacks, and sinter at high temperature. The layers were laminated together by applying heat, pressure, chemical solvents, and varying combinations of the three. This paper presents the results of all fabrication tests, describes the method used to successfully laminate and sinter one 33-layer stack, and summarizes other possible fabrication techniques for future investigation that would facilitate lamination the process.
C1 [Kelly, Matthew M.; Pan, Ming-Jen; Vick, Michael J.] US Naval Res Lab, Washington, DC 20375 USA.
RP Kelly, MM (reprint author), US Naval Res Lab, Washington, DC 20375 USA.
NR 8
TC 2
Z9 2
U1 1
U2 2
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4471-7
PY 2012
BP 581
EP 587
PG 7
WC Engineering, Mechanical; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Engineering; Materials Science; Metallurgy & Metallurgical Engineering
GA BHC48
UT WOS:000324956100061
ER
PT B
AU Drazen, D
Terrill, E
Walker, D
Hazard, J
Cook, T
Scott, S
AF Drazen, David
Terrill, Eric
Walker, Don
Hazard, Joel
Cook, Tom
Scott, Shannon
GP ASME
TI FULL-SCALE MEASUREMENTS OF WAVE IMPACT LOADING ON A FLAT PLATE
SO PROCEEDINGS OF THE ASME 31ST INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE
AND ARTIC ENGINEERING, VOL 1
LA English
DT Proceedings Paper
CT 31st ASME International Conference on Ocean, Offshore and Arctic
Engineering
CY JUL 01-06, 2012
CL Rio de Janeiro, BRAZIL
SP Petrobras, ASME, Ocean Offshore & Arct Engn Div
AB Full scale measurements of wave impact loads and their statistics in real sea states are desirable for validation of numerical simulations and for application to marine engineering design problems. Measuring and/or estimating wave forces on flat plates are especially problematic due to statistics of large waves in a given sea state, the intermittent statistics of wave breaking, the sensitivity of the loading relative to the phase of the incoming wave and scaling issues when translating from model scale data to full-scale. To increase our understanding of wave hydrodynamic pressures on a flat plate, an instrumented plate was deployed from the Scripps Institution of Oceanography's research pier. The instrumented plate is exposed to a wide range of wave conditions with H-s ranging from 3-4 m in the winter and with Hs in the 1-2 m range in the summer The instrumented flat plate is composed of three discrete modules containing 6 pressure gages. Data are being collected over a extended period, nominally 12 months, to characterize extreme value distributions due to wave impact loading.
C1 [Drazen, David; Walker, Don] Naval Surface Warfare Ctr, Carderock Div, West Bethesda, MD USA.
RP Drazen, D (reprint author), Naval Surface Warfare Ctr, Carderock Div, West Bethesda, MD USA.
NR 14
TC 1
Z9 1
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4488-5
PY 2012
BP 449
EP 458
PG 10
WC Engineering, Ocean; Engineering, Mechanical
SC Engineering
GA BGY22
UT WOS:000324565000047
ER
PT B
AU Carr, MA
AF Carr, Matthew A.
GP ASME
TI RECIPROCATING STEAM TURNS 300
SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS
AND EXPOSITION, 2011, VOL 5
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
(IMECE)
CY NOV 11-17, 2011
CL Denver, CO
SP Amer Soc Mech Engn
DE Thomas Newcomen; reciprocating steam pump; atmospheric engine; indicator
graph; Westfield Engine at Parkgate; mine dewatering
AB The year 2012 marks the 300th anniversary of the first successful reciprocating steam engine, which was built by Thomas Newcomen of Dartmouth, England to dewater a coal mine near Tipton, West Midlands, England. With over 1400 built during the 18th Century, Newcomen engines enabled the Industrial Revolution. This paper: (1) commemorates this achievement through an overview of the development of this remarkable machine; (2) describes the operation of the Newcomen steam engine; and, (3) provides modern thermofluids analyses using authentic historical data of the Westfield Engine at Parkgate, an engine that was constructed in 1823 and dismantled in 1934. The overarching goal of this paper is to encourage teaching about this fascinating historical technology in today's classrooms by providing the background knowledge and pertinent calculations for integration into current thermofluids courses.
C1 US Naval Acad, Dept Mech Engn, Annapolis, MD 21402 USA.
RP Carr, MA (reprint author), US Naval Acad, Dept Mech Engn, Annapolis, MD 21402 USA.
EM macarr@usna.edu
NR 7
TC 0
Z9 0
U1 1
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5491-4
PY 2012
BP 249
EP 258
PG 10
WC Education, Scientific Disciplines; Engineering, Mechanical
SC Education & Educational Research; Engineering
GA BGZ18
UT WOS:000324656200032
ER
PT B
AU Sun, MTW
Wescott, CG
Jones, LR
AF Sun, Milan Tung-Wen
Wescott, Clay G.
Jones, L. R.
BE Sun, MTW
Wescott, CG
Jones, LR
TI Exploring the Dilemma of Trust and Governance PEFACE
SO TRUST AND GOVERNANCE INSTITUTIONS: ASIAN EXPERIENCES
SE Research in Public Management
LA English
DT Editorial Material; Book Chapter
C1 [Sun, Milan Tung-Wen] Natl Chi Nan Univ, Dept Publ Policy & Adm, Puli, Taiwan.
[Wescott, Clay G.] World Bank, Washington, DC USA.
[Wescott, Clay G.] Princeton Univ, Princeton, NJ 08544 USA.
[Jones, L. R.] Naval Postgrad Sch, Grad Sch Business & Publ Policy, Monterey, CA USA.
RP Sun, MTW (reprint author), Natl Chi Nan Univ, Dept Publ Policy & Adm, Puli, Taiwan.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU INFORMATION AGE PUBLISHING-IAP
PI CHARLOTTE
PA PO BOX 79049, CHARLOTTE, NC 28271-7047 USA
BN 978-1-61735-947-7
J9 RES PUBLIC MANAG
PY 2012
BP VII
EP XI
PG 5
WC Area Studies; Public Administration
SC Area Studies; Public Administration
GA BGL27
UT WOS:000323394800001
ER
PT J
AU Karbhari, VM
Love, CT
AF Karbhari, V. M.
Love, C. T.
BE Gao, F
TI Processing of nanotube-based nanocomposites
SO ADVANCES IN POLYMER NANOCOMPOSITES: TYPES AND APPLICATIONS
SE Woodhead Publishing in Materials
LA English
DT Article; Book Chapter
DE carbon nanotubes; composites; alignment; processing; performance
attributes
ID MULTIWALLED CARBON NANOTUBES; MOLECULAR-WEIGHT POLYETHYLENE; SITU
EMULSION POLYMERIZATION; MECHANICAL-PROPERTIES; ELECTRIC-FIELD; CHEMICAL
FUNCTIONALIZATION; POLY(METHYL METHACRYLATE); COMPOSITE FILMS;
NATURAL-RUBBER; LOAD-TRANSFER
AB With the continuing developments in materials synthesis and characterization at the nanoscale the potential of true materials tailoring has been enhanced substantially. In general this class of materials involves structures that have at least one dimension at the nanometer scale (usually taken to be up to 100 nanometers). The utilization of nanoscale fibers in polymer composites not only enables the development of uniquely created structures but also provides a means for the development of unique properties and functionalities at levels not possible with conventional fiber reinforced composites. It is the goal of this chapter to introduce the advances in carbon nanotube (CNT) nanocomposite research with specific emphasis on processing routes used to disperse, align and fabricate carbon nanotube reinforced polymer nanocomposites for enhanced physical and mechanical properties. Acknowledging that the potential for CNTs as reinforcement and conductive media has not yet been fully realized, a discussion on future trends is also given.
C1 [Karbhari, V. M.] Univ Alabama, Huntsville, AL 35899 USA.
[Love, C. T.] US Naval Res Lab, Alternate Energy Sect, Washington, DC 20375 USA.
RP Karbhari, VM (reprint author), Univ Alabama, 366 Shelbie King Hall, Huntsville, AL 35899 USA.
EM vistasp.karbhari@uah.edu; corey.love@nrl.navy.mil
NR 112
TC 2
Z9 2
U1 0
U2 1
PU WOODHEAD PUBL LTD
PI CAMBRIDGE
PA ABINGTON HALL ABINGTON, CAMBRIDGE CB1 6AH, CAMBS, ENGLAND
BN 978-0-85709-624-1
J9 WOODHEAD PUBL MATER
PY 2012
BP 3
EP 32
D2 10.1533/9780857096241
PG 30
WC Nanoscience & Nanotechnology; Polymer Science
SC Science & Technology - Other Topics; Polymer Science
GA BGH70
UT WOS:000323033800002
ER
PT J
AU Hamilton, R
Raghupathi, M
AF Hamilton, Ryan
Raghupathi, Mrinal
TI The Toeplitz Corona Problem for Algebras of Multipliers on a
Nevanlinna-Pick Space
SO INDIANA UNIVERSITY MATHEMATICS JOURNAL
LA English
DT Article
DE Nevanlinna-Pick interpolation; reproducing kernel; corona theorem;
multiplier algebra
ID KERNEL HILBERT-SPACES; INTERPOLATION; FACTORIZATION; SUBALGEBRAS;
REFLEXIVITY; INFINITY; THEOREM; BALL
AB Suppose U is an algebra of operators on a Hilbert space H and A(1), ... , A(n) is an element of U. If the row operator [A(1), ..., A(n)] has a right inverse, the Toeplitz corona problem asks if a right inverse can be found with entries in U. When H is a complete Nevanlinna-Pick space and U is a weakly closed algebra of multiplication operators on H, we show that under a stronger hypothesis, the Toeplitz corona problem for U has a solution. When U is the full multiplier algebra of H, the Toeplitz corona theorems of Arveson, Schubert, and Ball-Trent-Vinnikov are obtained. A tangential interpolation result for these algebras is introduced in order to solve the Toeplitz corona problem.
C1 [Hamilton, Ryan] Univ Waterloo, Dept Pure Math, Waterloo, ON N2L 3G1, Canada.
[Raghupathi, Mrinal] USN Acad, Dept Math, Annapolis, MD 21402 USA.
RP Hamilton, R (reprint author), Univ Waterloo, Dept Pure Math, Waterloo, ON N2L 3G1, Canada.
EM rhamilto@math.uwaterloo.ca; raghupat@usna.edu
FU NSERC
FX First author has been partially supported by an NSERC graduate
scholarship.
NR 23
TC 1
Z9 1
U1 0
U2 1
PU INDIANA UNIV MATH JOURNAL
PI BLOOMINGTON
PA SWAIN HALL EAST 222, BLOOMINGTON, IN 47405 USA
SN 0022-2518
J9 INDIANA U MATH J
JI Indiana Univ. Math. J.
PY 2012
VL 61
IS 4
BP 1393
EP 1405
PG 13
WC Mathematics
SC Mathematics
GA 202BE
UT WOS:000323187700001
ER
PT S
AU Bailey, JK
Schweitzer, JA
Ubeda, F
Fitzpatrick, BM
Genung, MA
Pregitzer, CC
Zinkgraf, M
Whitham, TG
Keith, A
O'Reilly-Wapstra, JM
Potts, BM
Rehill, BJ
Leroy, CJ
Fischer, DG
AF Bailey, Joseph K.
Schweitzer, Jennifer A.
Ubeda, Francisco
Fitzpatrick, Benjamin M.
Genung, Mark A.
Pregitzer, Clara C.
Zinkgraf, Matthew
Whitham, Thomas G.
Keith, Arthur
O'Reilly-Wapstra, Julianne M.
Potts, Bradley M.
Rehill, Brian J.
Leroy, Carri J.
Fischer, Dylan G.
BE Iason, GR
Dicke, M
Hartley, SE
TI From genes to ecosystems: emerging concepts bridging ecological and
evolutionary dynamics
SO ECOLOGY OF PLANT SECONDARY METABOLITES: FROM GENES TO GLOBAL PROCESSES
SE Ecological Reviews
LA English
DT Article; Book Chapter
ID COMMUNITY ECOLOGY; LOCAL ADAPTATION; PLANT GENOTYPE; CONTEMPORARY
MICROEVOLUTION; NATURAL HYBRIDIZATION; PHYTOPHAGOUS INSECTS; RAPID
EVOLUTION; MODERN LIFE; HERBIVORE; SELECTION
C1 [Bailey, Joseph K.; Schweitzer, Jennifer A.; Ubeda, Francisco; Fitzpatrick, Benjamin M.; Genung, Mark A.; Pregitzer, Clara C.] Univ Tennessee, Dept Ecol & Evolutionary Biol, Knoxville, TN 37996 USA.
[Zinkgraf, Matthew; Whitham, Thomas G.; Keith, Arthur] No Arizona Univ, Dept Biol Sci, Flagstaff, AZ 86011 USA.
[O'Reilly-Wapstra, Julianne M.; Potts, Bradley M.] Univ Tasmania, Sch Plant Sci, Hobart, Tas 7001, Australia.
[Rehill, Brian J.] US Naval Acad, Dept Chem, Annapolis, MD 21402 USA.
[Leroy, Carri J.; Fischer, Dylan G.] Evergreen State Coll, Environm Studies Program, Olympia, WA 98505 USA.
RP Bailey, JK (reprint author), Univ Tennessee, Dept Ecol & Evolutionary Biol, Knoxville, TN 37996 USA.
EM Joe.Bailey@utk.edu; Jen.Schweitzer@utk.edu; fubeda@utk.edu;
benfitz@utk.edu; mgenung@utk.edu; cpregitz@utk.edu; msz2@nau.edu;
Thomas.Whitham@nau.edu; Arthur.Keith@NAU.EDU;
Julianne.OReilly@utas.edu.au; B.M.Potts@utas.edu.au; rehill@usna.edu;
LeRoyC@evergreen.edu; fischerd@evergreen.edu
RI Potts, Brad/C-6489-2013
OI Potts, Brad/0000-0001-6244-289X
NR 84
TC 4
Z9 4
U1 2
U2 20
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
SN 1992-3295
BN 978-0-521-19326-9
J9 ECOL REV
JI Ecol. Rev.
PY 2012
BP 269
EP 286
D2 10.1017/CBO9780511675751
PG 18
WC Plant Sciences; Ecology
SC Plant Sciences; Environmental Sciences & Ecology
GA BFZ30
UT WOS:000321954600015
ER
PT S
AU Romano, M
AF Romano, Marcello
BE Guerman, AD
Bainum, PM
Contant, JM
TI CONCISE FORM OF THE DYNAMIC AND KINEMATIC SOLUTIONS OF THE EULER-POINSOT
PROBLEM
SO FIRST IAA CONFERENCE ON DYNAMICS AND CONTROL OF SPACE SYSTEMS 2012, PTS
I AND II
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 1st International-Academy-of-Astronautics Conference on Dynamics and
Control of Space Systems (DyCoSS)
CY MAR 19-21, 2012
CL Porto, PORTUGAL
SP Int Acad Astronaut
AB The spontaneous motion (or torque-free motion) of a triaxial rigid body, also known as Euler-Poinsot motion, is defined as the rotation of a rigid body under no external torques. Previously known exact solutions of the Euler-Poinsot problem are here presented in an original form. The solutions for both the dynamics (angular velocity components) and for the kinematics (in terms of elements of the rotation matrix) are here presented as a sequence of self-contained theorems. In particular, the dynamic solution, discovered by Jacobi, is formulated in a new universal form which is advantageous with respect to previously proposed forms: in fact the new form proposed here is very compact and it is universal, in the sense that all of the possible cases of initial conditions and body geometries are treated in a single statement and no branching in different solutions, as a discrete function of time, is necessary. Furthermore, the kinematic solution in terms of rotation matrix, initially proposed by Jacobi, is re-written here in modern notation, and, for the first time, given in a universal form. The here proposed formulations, because of their compactness and universality, are appealing for use in both graduate students' education and in the engineering practice: in fact, they are particularly suitable for software implementation.
C1 US Naval Postgrad Sch, Dept Mech & Aerosp Engn, Monterey, CA USA.
RP Romano, M (reprint author), US Naval Postgrad Sch, Dept Mech & Aerosp Engn, Monterey, CA USA.
NR 17
TC 0
Z9 0
U1 0
U2 2
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-587-9
J9 ADV ASTRONAUT SCI
PY 2012
VL 145
BP 55
EP 68
PG 14
WC Engineering, Aerospace
SC Engineering
GA BFX62
UT WOS:000321808100005
ER
PT J
AU Augier, M
Knudsen, T
AF Augier, Mie
Knudsen, Thorbjorn
BE Arena, R
Festre, A
Lazaric, N
TI The architecture and management of knowledge in organizations
SO HANDBOOK OF KNOWLEDGE AND ECONOMICS
LA English
DT Article; Book Chapter
ID DYNAMIC CAPABILITIES; POLYARCHIES; HIERARCHIES; SYSTEMS; FALLIBILITY;
INFORMATION; COMMITTEES; ECONOMICS; ASSETS
C1 [Augier, Mie] Naval Postgrad Sch, Ctr New Secur Econ & Net Assessment, Monterey, CA USA.
[Knudsen, Thorbjorn] Univ Southern Denmark, Strateg Org Design Unit SOD, Odense, Denmark.
RP Augier, M (reprint author), Naval Postgrad Sch, Ctr New Secur Econ & Net Assessment, Monterey, CA USA.
NR 38
TC 0
Z9 0
U1 1
U2 2
PU EDWARD ELGAR PUBLISHING LTD
PI CHELTENHAM
PA GLENSANDA HOUSE, MONTPELLIER PARADE, CHELTENHAM GL50 1UA, GLOS, ENGLAND
BN 978-1-84376-404-5
PY 2012
BP 435
EP 457
PG 23
WC Business; Economics
SC Business & Economics
GA BFW75
UT WOS:000321700000019
ER
PT S
AU Kanaev, AV
AF Kanaev, A. V.
BE Stein, K
Gonglewski, J
TI Multi-frame Restoration of Turbulence Degraded Underwater Images
SO OPTICS IN ATMOSPHERIC PROPAGATION AND ADAPTIVE SYSTEMS XV
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Optics in Atmospheric Propagation and Adaptive Systems XV
CY SEP 25, 2012
CL Edinburgh, SCOTLAND
SP SPIE, SELEX GALILEO, THALES
DE underwater imaging; optical flow; confidence measure; imaging through
turbulence
AB The ability to image underwater is highly desired for scientific and military applications, including optical communications, situational awareness, diver visibility, and mine detection. However, underwater imaging is severely impaired by scattering and optical turbulence associated with refraction index fluctuations. Naturally, the approaches taken to solve the underwater image restoration problem have their origin in atmospheric turbulence compensation algorithms. There is certain similarity between the atmospheric and underwater image degradations but the difference in the scales of refraction index fluctuations in two media brings out the need for significant modifications of atmospheric techniques to be applicable to underwater imagery. Significantly stronger underwater image distortions resulting in large local shifts and warping of the image features require robust tracking using, for example optical flow estimation, even under relatively benign underwater conditions. Comparative performance of multi-frame nonlinear gain "lucky patch" algorithms with variable degree of optical flow technique sophistication is presented for underwater imagery collected in a laboratory tank and in a field exercise. Reliance of image restoration on accuracy of the optical flow algorithm is revealed and one approach to enhance restored image quality using confidence measures of optical flow estimation is proposed.
C1 Naval Res Lab, Washington, DC 20375 USA.
RP Kanaev, AV (reprint author), Naval Res Lab, 4555 Overlook Ave, Washington, DC 20375 USA.
NR 11
TC 0
Z9 0
U1 0
U2 7
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9275-3
J9 PROC SPIE
PY 2012
VL 8535
AR 85350N
DI 10.1117/12.980433
PG 6
WC Meteorology & Atmospheric Sciences; Optics
SC Meteorology & Atmospheric Sciences; Optics
GA BGG95
UT WOS:000322909200017
ER
PT S
AU Sprangle, P
Penano, JR
Markov, V
Khizhnyak, A
Ting, A
Hafizi, B
Davis, CC
DeSandre, L
AF Sprangle, P.
Penano, J. R.
Markov, V.
Khizhnyak, A.
Ting, A.
Hafizi, B.
Davis, C. C.
DeSandre, L.
BE Stein, K
Gonglewski, J
TI Nonlinear OPC Technique for Laser Beam Control in Turbulent Atmosphere
SO OPTICS IN ATMOSPHERIC PROPAGATION AND ADAPTIVE SYSTEMS XV
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Optics in Atmospheric Propagation and Adaptive Systems XV
CY SEP 25, 2012
CL Edinburgh, SCOTLAND
SP SPIE, SELEX GALILEO, THALES
DE laser beam control; optical phase conjugation; atmospheric propagation
ID PHASE CONJUGATION; ACTIVE TRACKING; TARGET; PROPAGATION
AB This paper discusses a novel type of beam director for effective laser beacon formation in deep turbulence conditions. The concept of the proposed beam director is based on an innovative approach employing a Brillouin enhanced four-wave mixing (BEFWM) mechanism for generating a tight (small spot size) laser beacon on a remote image-resolved target. The BEFWM technique enables both amplification and total (phase and amplitude) conjugation of the beacon-forming beam without the need for wavefront sensors, deformable mirrors or predictive feedback algorithms. Total conjugation is critical for beam control in the presence of strong turbulence, whereas conventional adaptive optics methods do not have this capability. The phase information retrieved from the beacon beam can be used in conjunction with an AO system to propagate laser beams in deep turbulence.
C1 [Sprangle, P.; Penano, J. R.; Ting, A.] Naval Res Lab, Plasma Phys Div, Washington, DC 20375 USA.
RP Sprangle, P (reprint author), Naval Res Lab, Plasma Phys Div, Washington, DC 20375 USA.
NR 23
TC 1
Z9 1
U1 1
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9275-3
J9 PROC SPIE
PY 2012
VL 8535
AR 85350F
DI 10.1117/12.974256
PG 10
WC Meteorology & Atmospheric Sciences; Optics
SC Meteorology & Atmospheric Sciences; Optics
GA BGG95
UT WOS:000322909200010
ER
PT B
AU DeGiorgi, VG
AF DeGiorgi, Virginia G.
GP ASME
TI PATHWAYS INTO CORROSION RELATED NAVAL APPLICATIONS
SO PROCEEDINGS OF THE ASME CONFERENCE ON SMART MATERIALS, ADAPTIVE
STRUCTURES AND INTELLIGENT SYSTEMS (SMASIS 2011), VOL 1
LA English
DT Proceedings Paper
CT 4th Annual Meeting of the ASME/AIAA Smart Materials, Adaptive Structures
and Intelligent Systems (SMASIS)
CY SEP 18-21, 2011
CL Scottsdale, AZ
SP ASME, AIAA
ID PITTING CORROSION
AB The cost of corrosion to the US military is huge. In 2006-2007 the US Navy spent $3.2 Billion on corrosion related maintenance on ships alone. Additional funds were expended maintaining US Navy aircraft, helicopters and land vehicles. The cost of corrosion must be controlled. It is apparent that extraordinary cost reductions are needed to bring the problem under control. In order to achieve such dramatic improvements changes from conventional methods of construction, inspection and monitoring are necessary. There are ample opportunities for active material technologies if the researcher understands the fundamental corrosion problem. In this paper the author outlines information on US Navy corrosion concerns including examples of recent request for information data calls. It is hoped that this paper will help researchers in the SMASIS community understand the needs associated with US naval corrosion.
C1 Naval Res Lab, Code 6353, Syst Design & Integrat Sect, Washington, DC USA.
RP DeGiorgi, VG (reprint author), Naval Res Lab, Code 6353, Syst Design & Integrat Sect, Washington, DC USA.
EM Virginia.DeGiorgi@nrl.navy.mil
NR 20
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5471-6
PY 2012
BP 695
EP 701
PG 7
WC Engineering, Mechanical; Materials Science, Multidisciplinary
SC Engineering; Materials Science
GA BGA73
UT WOS:000322090400088
ER
PT S
AU Huhman, BM
Neri, JM
AF Huhman, B. M.
Neri, J. M.
BE Hegeler, F
TI Design of a Compact, Battery-Powered Rep-Rate Charger for an 88-kJ
Capacitor Bank for EML Applications
SO PROCEEDINGS OF THE 2012 IEEE INTERNATIONAL POWER MODULATOR AND HIGH
VOLTAGE CONFERENCE
SE IEEE International Power Modulator and High Voltage Conference
LA English
DT Proceedings Paper
CT IEEE International Power Modulator and High Voltage Conference (IPMHVC)
CY JUN 03-07, 2012
CL San Diego, CA
SP IEEE, IEEE Dielectr & Elect Insulat Soc, IEEE Nucl & Plasma Sci Soc, IEEE Electron Devices Soc, Sandia Natl Labs, Dept Navy, Naval Res Lab, GE, INP Greifswald, L3 Appl Technologies, Pulse Sci, Lockheed Martin, Ness Engn Inc
DE Electromagnetic launchers; rep-rate; batteries; LLC converter
ID LLC RESONANT CONVERTER
AB The Materials Testing Facility (MTF) at the U.S. Naval Research Laboratory (NRL) is developing a battery-powered, rep-rate charger for an 88-kJ capacitor bank. The goal is to charge a 7000-mu F capacitor to 5-kV in four seconds for a fifty shot burst. A bank of LiFePO4 batteries is used with a full H-bridge converter, a transformer, and a rectifier to transform the 500V battery voltage to a 5-kV secondary voltage.
A key parameter is to minimize the converter weight and volume; therefore the switching frequency needs to be as high as possible to reduce the size of filter components and transformers. However, as the frequency increases, switching losses will begin to dominate and a practical limit will be reached before the device switching maximum is reached. In addition to the design of stable battery packs, most of the work has been focused on switch design and driver optimization, utilizing techniques such as resonate switching and active feedback control systems. This paper will present simulation data and results from experiments.
C1 [Huhman, B. M.; Neri, J. M.] Naval Res Lab, Div Plasma Phys, Washington, DC USA.
RP Huhman, BM (reprint author), Naval Res Lab, Div Plasma Phys, Washington, DC USA.
EM brett.huhman@nrl.navy.mil
NR 6
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2380-808X
BN 978-1-4673-1225-7; 978-1-4673-1222-6
J9 IEEE INT POWER MODUL
PY 2012
BP 88
EP 91
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BGB05
UT WOS:000322131200022
ER
PT S
AU Hegeler, F
Myers, MC
Wolford, MF
Sethian, JD
Fielding, AM
AF Hegeler, Frank
Myers, Matthew C.
Wolford, Matthew F.
Sethian, John D.
Fielding, Andrew M.
BE Hegeler, F
TI Low Jitter, High Voltage, Repetitive Laser Triggered SF6 Gas Insulated
Spark Gaps
SO PROCEEDINGS OF THE 2012 IEEE INTERNATIONAL POWER MODULATOR AND HIGH
VOLTAGE CONFERENCE
SE IEEE International Power Modulator and High Voltage Conference
LA English
DT Proceedings Paper
CT IEEE International Power Modulator and High Voltage Conference (IPMHVC)
CY JUN 03-07, 2012
CL San Diego, CA
SP IEEE, IEEE Dielectr & Elect Insulat Soc, IEEE Nucl & Plasma Sci Soc, IEEE Electron Devices Soc, Sandia Natl Labs, Dept Navy, Naval Res Lab, GE, INP Greifswald, L3 Appl Technologies, Pulse Sci, Lockheed Martin, Ness Engn Inc
DE Laser triggered gas switches; SF6; pulse power system
ID FUSION ENERGY; PULSED-POWER; SWITCHES
AB The Electra pulsed power system at the Naval Research Laboratory uses four laser triggered SF6 gas switches to transfer the stored pulse forming line energy to the load. Each switch has a hold-off voltage of more than 1 MV and transfers a charge of up to 10.5 mC per shot, with a switch current peak amplitude of 60 kA. The gas switches were originally constructed with hemispherical shaped electrodes. Continuous operations at repetition rates of up to 5 pulses per second showed increases in the switch jitter and switch misfire rates. A redesign with flat electrodes, which provide a more uniform electric field in the switch gap, showed a decrease in switch jitter.
C1 [Myers, Matthew C.; Wolford, Matthew F.; Sethian, John D.] Naval Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Hegeler, F (reprint author), Commonwealth Technol Inc, Alexandria, VA 22315 USA.
OI Wolford, Matthew/0000-0002-8624-1336
NR 22
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2380-808X
BN 978-1-4673-1225-7; 978-1-4673-1222-6
J9 IEEE INT POWER MODUL
PY 2012
BP 128
EP 131
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BGB05
UT WOS:000322131200031
ER
PT S
AU Allen, RJ
Boyer, CN
Huhman, BM
Neri, JM
Veracka, MJ
AF Allen, Raymond J.
Boyer, Craig N.
Huhman, Brett M.
Neri, Jesse M.
Veracka, Michael J.
BE Hegeler, F
TI Progress Toward a Self-Contained Rapid Capacitor Charger for a Small
Railgun in Burst Mode Operation at 3 RPS
SO PROCEEDINGS OF THE 2012 IEEE INTERNATIONAL POWER MODULATOR AND HIGH
VOLTAGE CONFERENCE
SE IEEE International Power Modulator and High Voltage Conference
LA English
DT Proceedings Paper
CT IEEE International Power Modulator and High Voltage Conference (IPMHVC)
CY JUN 03-07, 2012
CL San Diego, CA
SP IEEE, IEEE Dielectr & Elect Insulat Soc, IEEE Nucl & Plasma Sci Soc, IEEE Electron Devices Soc, Sandia Natl Labs, Dept Navy, Naval Res Lab, GE, INP Greifswald, L3 Appl Technologies, Pulse Sci, Lockheed Martin, Ness Engn Inc
AB In previous work, one module of a battery powered rapid charger was created which was able to charge the capacitor bank of a low velocity railgun [1] to 2 kV at 1 Hz in burst mode [2][3]. A second module has recently been added to the system which has demonstrated how these modules can be combined in parallel to increase both the power and energy available. Also, some additions to the circuit have improved the robustness of the system. Further improvements to the railgun now allow us to reduce the required charge voltage to 1.8 kV although the capacitance of the bank will increase to keep the stored energy the same. The rapid charger has now demonstrated 2 RPS operation. Methods to further increase the charge rate are discussed. Research into alternative battery types reveals that our current drycell lead-acid batteries compare favorably to newer battery types.
C1 [Allen, Raymond J.; Huhman, Brett M.; Neri, Jesse M.] Naval Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Allen, RJ (reprint author), Naval Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
NR 3
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2380-808X
BN 978-1-4673-1225-7; 978-1-4673-1222-6
J9 IEEE INT POWER MODUL
PY 2012
BP 218
EP 220
PG 3
WC Engineering, Electrical & Electronic
SC Engineering
GA BGB05
UT WOS:000322131200053
ER
PT B
AU Carr, MA
Caton, PA
Hamilton, LJ
Cowart, JS
Mehl, M
Pitz, WJ
AF Carr, Matthew A.
Caton, Patrick A.
Hamilton, Leonard J.
Cowart, Jim S.
Mehl, Marco
Pitz, William J.
GP ASME
TI AN EXPERIMENTAL AND MODELING-BASED STUDY INTO THE IGNITION DELAY
CHARACTERISTICS OF DIESEL SURROGATE BINARY BLEND FUELS
SO PROCEEDINGS OF THE ASME INTERNAL COMBUSTION ENGINE DIVISION FALL
TECHNICAL CONFERENCE (ICEF)
LA English
DT Proceedings Paper
CT ASME Internal Combustion Engine Division Fall Technical Conference
CY SEP 02-05, 2011
CL Morgantown, WV
SP ASME, Internal Combust Engine Div
ID HYDROCARBONS
AB This study examines the combustion characteristics of a binary mixture surrogate for possible future diesel fuels using both a single-cylinder research engine and a homogeneous reactor model using detailed chemical reaction kinetics. Binary mixtures of a normal straight-chain alkane (pure n-hexadecane, also known as n-cetane, C16H34) and an alkyl aromatic (toluene, C7H8) were tested in a single-cylinder research engine. Pure n-hexadecane was tested as a baseline reference, followed by 50%, 70%, and 80% toluene in hexadecane blends. Testing was conducted at fixed engine speed and constant indicated load. As references, two conventional petroleum-based fuels (commercial diesel and US Navy JP-5 jet fuel) and five synthetic Fischer-Tropsch-based fuels were also tested. The ignition delay of the binary mixture surrogate increased with increasing toluene fraction and ranged from approximately 1.3 ms (pure hexadecane) to 3.0 ms (80% toluene in hexadecane). While ignition delay changed substantially, the location of 50% mass fraction burned did not change as significantly due to a simultaneous change in the premixed combustion fraction. Detailed chemical reaction rate modeling using a constant pressure, adiabatic, homogeneous reactor model predicts a chemical ignition delay with a similar trend to the experimental results, but shorter overall magnitude. The difference between this predicted homogeneous chemical ignition delay and the experimentally observed ignition delay is defined as the physical ignition delay due to processes such as spray formation, entrainment, mixing, and vaporization. On a relative basis, the addition of 70% toluene to hexadecane causes a nearly identical relative increase in both physical and chemical ignition delay of approximately 50%. The chemical kinetic model predicts that, even though the addition of toluene delays the global onset of ignition, the initial production of reactive precursors such as HO2 and H2O2 may be faster with toluene due to the weakly bound methyl group. However, this initial production is insufficient to lead to wide-scale chain branching and ignition. The model predicts that the straight-chain alkane component (hexadecane) ignites first, causing the aromatic component to be consumed shortly thereafter. Greater ignition delay observed with the high toluene fraction blends is due to consumption of OH radicals by toluene. Overall, the detailed kinetic model captures the experimentally observed trends well and may be able to provide insight as to the relationship between bulk properties and physical ignition delay.
C1 [Carr, Matthew A.; Caton, Patrick A.; Hamilton, Leonard J.; Cowart, Jim S.] US Naval Acad, Annapolis, MD USA.
RP Carr, MA (reprint author), US Naval Acad, Annapolis, MD USA.
EM patcaton@usna.edu; cowart@usna.edu
NR 25
TC 0
Z9 0
U1 1
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4442-7
PY 2012
BP 95
EP 108
PG 14
WC Engineering, Mechanical; Transportation Science & Technology
SC Engineering; Transportation
GA BGA66
UT WOS:000322089700010
ER
PT S
AU Caban, JJ
Rosebrock, A
Yoo, TS
AF Caban, Jesus J.
Rosebrock, Adrian
Yoo, Terry S.
GP IEEE
TI AUTOMATIC IDENTIFICATION OF PRESCRIPTION DRUGS USING SHAPE DISTRIBUTION
MODELS
SO 2012 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP 2012)
SE IEEE International Conference on Image Processing ICIP
LA English
DT Proceedings Paper
CT 19th IEEE International Conference on Image Processing (ICIP)
CY SEP 30-OCT 03, 2012
CL Lake Buena Vista, FL
SP Inst Elect & Elect Engineers (IEEE), IEEE Signal Proc Soc
DE Feature extraction; Image classification; Image retrieval; Object
Recognition; Image Processing
AB Medication errors are one of the safety problems most frequently seen in hospital organizations. It is estimated that 12.2% of all hospitalized patients are involved in some form of adverse drug event (ADE) [1]. A significant amount of ADEs result from handing the incorrect drug to a patient or prescribing the wrong medication.
This paper introduces a simple yet robust classification technique that can be used to automatically identify prescriptions drugs within images. The system uses a modified shape distribution technique to examine the shape, color, and imprint of a pill and create an invariant descriptor that can be used to recognize the same drug under different viewing conditions. The proposed technique has been successfully evaluated with 568 of the most prescribed drugs in the United States and has shown a 91.13% accuracy in automatically identifying the correct medication.
C1 [Caban, Jesus J.] USN, Natl Intrepid Ctr Excellence NICoE, Med Ctr, Bethesda, MD 20084 USA.
RP Caban, JJ (reprint author), USN, Natl Intrepid Ctr Excellence NICoE, Med Ctr, Bethesda, MD 20084 USA.
NR 7
TC 1
Z9 1
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-4880
BN 978-1-4673-2533-2
J9 IEEE IMAGE PROC
PY 2012
BP 1005
EP 1008
PG 4
WC Imaging Science & Photographic Technology
SC Imaging Science & Photographic Technology
GA BFE17
UT WOS:000319334901021
ER
PT S
AU Karpenko, M
Bhatt, S
Bedrossian, N
Ross, IM
AF Karpenko, M.
Bhatt, S.
Bedrossian, N.
Ross, I. M.
BE Schaub, H
Gunter, BC
Russell, RP
Cerven, WT
TI DESIGN AND FLIGHT IMPLEMENTATION OF OPERATIONALLY RELEVANT TIME-OPTIMAL
SPACECRAFT MANEUVERS
SO ASTRODYNAMICS 2011, PTS I - IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT AAS/AIAA Astrodynamics Specialist Conference
CY JUL 31-AUG 04, 2011
CL AK
SP AAS, AIAA
ID FEEDBACK LINEARIZABLE SYSTEMS; PSEUDOSPECTRAL METHODS; RIGID SPACECRAFT;
REORIENTATION
AB This paper presents the flight implementation of an operationally relevant time-optimal maneuver experiment on the TRACE spacecraft. The objective is to demonstrate time-optimal maneuvering capabilities within the context of a typical operational scenario, such as scientific data collection, in which a spacecraft is required slew to various orientations in succession. The time-optimal maneuvers are designed by constructing an appropriate optimal control problem formulation based on a detailed model of the reaction wheel spacecraft dynamics. The high-dimensional optimization model includes practical constraints on the spacecraft performance including the nonlinear reaction wheel torque-momentum envelope and is solved using the Legendre pseudospectral method. The flight results demonstrate that time-optimal maneuvers can be designed and predictably executed within the specified limits. Moreover, the results of the flight experiment show clearly that the application of Legendre pseudospectral method for time-optimal maneuver design can extend the capabilities of the spacecraft over a wide envelope without the need to reconfigure or otherwise modify the existing spacecraft attitude control system.
C1 [Karpenko, M.; Ross, I. M.] USN, Dept Mech & Aerosp Engn, Postgrad Sch, Monterey, CA USA.
RP Karpenko, M (reprint author), USN, Dept Mech & Aerosp Engn, Postgrad Sch, Monterey, CA USA.
NR 20
TC 0
Z9 0
U1 0
U2 1
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-577-0
J9 ADV ASTRONAUT SCI
PY 2012
VL 142
BP 2875
EP 2891
PG 17
WC Engineering, Aerospace
SC Engineering
GA BFY99
UT WOS:000321933401047
ER
PT S
AU Ciarcia, M
Romano, M
AF Ciarcia, Marco
Romano, Marcello
BE Schaub, H
Gunter, BC
Russell, RP
Cerven, WT
TI SPACECRAFT PROXIMITY MANEUVER GUIDANCE BASED ON INVERSE DYNAMIC AND
SEQUENTIAL GRADIENT-RESTORATION ALGORITHM
SO ASTRODYNAMICS 2011, PTS I - IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT AAS/AIAA Astrodynamics Specialist Conference
CY JUL 31-AUG 04, 2011
CL AK
SP AAS, AIAA
ID OPTIMIZATION; TRAJECTORIES
AB In this work the inverse dynamic in the virtual domain technique is coupled with the sequential gradient-restoration algorithm to generate, in real-time, suboptimal trajectories for close proximity maneuvers between a chaser and a moving non-cooperative target. The inverse dynamic in the virtual domain technique allow a simple analytical description of the prototype trajectory, on the other hand, the fast convergence performances of the sequential gradient-restoration algorithm guarantee a quick computation of the near-optimal solution trajectory. This method is implemented to an in-plane case in which a chaser spacecraft docks with a target spacecraft that is independently rotating. Both minimum fuel and minimum energy optimization criteria are considered. Exhaustive sets of simulations have proven the suitability of the presented approach.
C1 [Ciarcia, Marco; Romano, Marcello] Naval Postgrad Sch, Dept Mech & Aerosp Engn, Monterey, CA 93943 USA.
RP Ciarcia, M (reprint author), Naval Postgrad Sch, Dept Mech & Aerosp Engn, 700 Dyer Rd, Monterey, CA 93943 USA.
NR 16
TC 0
Z9 0
U1 0
U2 2
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-577-0
J9 ADV ASTRONAUT SCI
PY 2012
VL 142
BP 3679
EP 3697
PG 19
WC Engineering, Aerospace
SC Engineering
GA BFY99
UT WOS:000321933401094
ER
PT S
AU Branstetter, BK
Trickey, JS
Finneran, JJ
AF Branstetter, Brian K.
Trickey, Jennifer S.
Finneran, James J.
BE Popper, AN
Hawkins, A
TI On the Relationship Between Environmental Noise, Critical Ratios, and
Comodulation Masking Release in the Bottlenose Dolphin (Tursiops
truncatus)
SO EFFECTS OF NOISE ON AQUATIC LIFE
SE Advances in Experimental Medicine and Biology
LA English
DT Article
ID DELPHINAPTERUS-LEUCAS; CRITICAL BANDWIDTH
C1 [Branstetter, Brian K.] Natl Marine Mammal Fdn, San Diego, CA 92106 USA.
[Trickey, Jennifer S.] G2 Software Syst Inc, San Diego, CA 92110 USA.
[Finneran, James J.] US Navy Marine Mammal Program, Space & Naval Warfare Syst Ctr Pacific, San Diego, CA 92152 USA.
RP Branstetter, BK (reprint author), Natl Marine Mammal Fdn, San Diego, CA 92106 USA.
EM brian.branstetter@nmmpfoundation.org; trickey@g2ss.com;
james.finneran@navy.mil
OI Trickey, Jennifer/0000-0002-6080-8744
NR 6
TC 0
Z9 0
U1 0
U2 4
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 0065-2598
BN 978-1-4419-7310-8
J9 ADV EXP MED BIOL
JI Adv.Exp.Med.Biol.
PY 2012
VL 730
BP 29
EP 31
DI 10.1007/978-1-4419-7311-5_5
PG 3
WC Biology; Medicine, Research & Experimental
SC Life Sciences & Biomedicine - Other Topics; Research & Experimental
Medicine
GA BFV95
UT WOS:000321592700005
PM 22278442
ER
PT S
AU Schlundt, CE
Finneran, JJ
AF Schlundt, Carolyn E.
Finneran, James J.
BE Popper, AN
Hawkins, A
TI Direct Measurements of Subjective Loudness in a Bottlenose Dolphin
SO EFFECTS OF NOISE ON AQUATIC LIFE
SE Advances in Experimental Medicine and Biology
LA English
DT Article
ID TEMPORARY THRESHOLD SHIFT; TURSIOPS-TRUNCATUS; HEARING THRESHOLDS;
REACTION-TIME; TONES
C1 [Schlundt, Carolyn E.] ITT Corp, San Diego, CA 92154 USA.
[Finneran, James J.] US Navy Marine Mammal Program, Space & Naval Warfare Syst Ctr Pacific, San Diego, CA 92152 USA.
RP Schlundt, CE (reprint author), ITT Corp, San Diego, CA 92154 USA.
EM carolyn.melka@itt.com; james.finneran@navy.mil
NR 11
TC 0
Z9 0
U1 0
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 0065-2598
BN 978-1-4419-7310-8
J9 ADV EXP MED BIOL
JI Adv.Exp.Med.Biol.
PY 2012
VL 730
BP 33
EP 36
DI 10.1007/978-1-4419-7311-5_6
PG 4
WC Biology; Medicine, Research & Experimental
SC Life Sciences & Biomedicine - Other Topics; Research & Experimental
Medicine
GA BFV95
UT WOS:000321592700006
PM 22278443
ER
PT S
AU Mulsow, J
Reichmuth, C
Houser, D
Finneran, JJ
AF Mulsow, Jason
Reichmuth, Colleen
Houser, Dorian
Finneran, James J.
BE Popper, AN
Hawkins, A
TI Auditory Evoked Potential Measurement of Hearing Sensitivity in
Pinnipeds
SO EFFECTS OF NOISE ON AQUATIC LIFE
SE Advances in Experimental Medicine and Biology
LA English
DT Article
C1 [Mulsow, Jason; Finneran, James J.] US Navy Marine Mammal Program, Space & Naval Warfare Syst Ctr Pacific, San Diego, CA 92152 USA.
[Reichmuth, Colleen] Univ Calif Santa Cruz, Inst Marine Sci, Long Marine Lab, Santa Cruz, CA 95060 USA.
[Houser, Dorian] Natl Marine Mammal Fdn, San Diego, CA 92106 USA.
RP Mulsow, J (reprint author), US Navy Marine Mammal Program, Space & Naval Warfare Syst Ctr Pacific, San Diego, CA 92152 USA.
EM jason.mulsow@gmail.com; coll@ucsc.edu; dorian.houser@nmmfoundation.org;
james.finneran@navy.mil
NR 6
TC 1
Z9 1
U1 0
U2 3
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 0065-2598
BN 978-1-4419-7310-8
J9 ADV EXP MED BIOL
JI Adv.Exp.Med.Biol.
PY 2012
VL 730
BP 73
EP 76
DI 10.1007/978-1-4419-7311-5_16
PG 4
WC Biology; Medicine, Research & Experimental
SC Life Sciences & Biomedicine - Other Topics; Research & Experimental
Medicine
GA BFV95
UT WOS:000321592700016
PM 22278453
ER
PT S
AU Finneran, JJ
AF Finneran, James J.
BE Popper, AN
Hawkins, A
TI Auditory Effects of Underwater Noise in Odontocetes
SO EFFECTS OF NOISE ON AQUATIC LIFE
SE Advances in Experimental Medicine and Biology
LA English
DT Article
ID DOLPHIN TURSIOPS-TRUNCATUS; TEMPORARY THRESHOLD SHIFT; INDUCED
HEARING-LOSS; BOTTLE-NOSED DOLPHINS; RECOVERY; MODELS; TONES
C1 Space & Naval Warfare Syst Ctr Pacific, US Navy Marine Mammal Program, San Diego, CA 92152 USA.
RP Finneran, JJ (reprint author), Space & Naval Warfare Syst Ctr Pacific, US Navy Marine Mammal Program, San Diego, CA 92152 USA.
EM james.finneran@navy.mil
NR 14
TC 0
Z9 0
U1 2
U2 6
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 0065-2598
BN 978-1-4419-7310-8
J9 ADV EXP MED BIOL
JI Adv.Exp.Med.Biol.
PY 2012
VL 730
BP 197
EP 202
DI 10.1007/978-1-4419-7311-5_44
PG 6
WC Biology; Medicine, Research & Experimental
SC Life Sciences & Biomedicine - Other Topics; Research & Experimental
Medicine
GA BFV95
UT WOS:000321592700044
PM 22278481
ER
PT S
AU Houser, D
Yeates, L
Crocker, D
Martin, SW
Finneran, JJ
AF Houser, Dorian
Yeates, Laura
Crocker, Daniel
Martin, Stephen W.
Finneran, James J.
BE Popper, AN
Hawkins, A
TI Controlled Exposure Study of Dolphins and Sea Lions to Midfrequency
Sonarlike Signals
SO EFFECTS OF NOISE ON AQUATIC LIFE
SE Advances in Experimental Medicine and Biology
LA English
DT Article
ID BOTTLE-NOSED DOLPHINS; TEMPORARY THRESHOLD SHIFT; TURSIOPS-TRUNCATUS;
WHALES; TONES
C1 [Houser, Dorian; Yeates, Laura] Natl Marine Mammal Fdn, San Diego, CA 92106 USA.
[Crocker, Daniel] Sonoma State Univ, Rohnert Pk, CA 94928 USA.
[Martin, Stephen W.; Finneran, James J.] US Navy Marine Mammal Program, Space & Naval Warfare Syst Ctr Pacific, San Diego, CA 92152 USA.
RP Houser, D (reprint author), Natl Marine Mammal Fdn, San Diego, CA 92106 USA.
EM dorian.houser@nmmfoundation.org; laura.yeates@nmmfoundation.org;
crocker@sonoma.edu; stephen.w.martin@navy.mil; james.finneran@navy.mil
NR 8
TC 0
Z9 0
U1 0
U2 6
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 0065-2598
BN 978-1-4419-7310-8
J9 ADV EXP MED BIOL
JI Adv.Exp.Med.Biol.
PY 2012
VL 730
BP 269
EP 272
DI 10.1007/978-1-4419-7311-5_59
PG 4
WC Biology; Medicine, Research & Experimental
SC Life Sciences & Biomedicine - Other Topics; Research & Experimental
Medicine
GA BFV95
UT WOS:000321592700059
PM 22278496
ER
PT S
AU Gisiner, R
Frisk, G
AF Gisiner, Robert
Frisk, George
BE Popper, AN
Hawkins, A
TI Workshop Two: Long-Term and Cumulative Effects of Acoustic Exposure
Along With Other Stressors
SO EFFECTS OF NOISE ON AQUATIC LIFE
SE Advances in Experimental Medicine and Biology
LA English
DT Article
C1 [Gisiner, Robert] Naval Postgrad Sch, Naval Operat Energy Installat & Environm Div, Monterey, CA 93943 USA.
[Gisiner, Robert] Naval Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
[Frisk, George] Florida Atlantic Univ, Dept Ocean & Mech Engn, Dania, FL 33004 USA.
RP Gisiner, R (reprint author), Naval Postgrad Sch, Naval Operat Energy Installat & Environm Div, Monterey, CA 93943 USA.
EM bob.gisiner@navy.mil; gfrisk@.seatech.fau.edu
NR 2
TC 0
Z9 0
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
SN 0065-2598
BN 978-1-4419-7310-8
J9 ADV EXP MED BIOL
JI Adv.Exp.Med.Biol.
PY 2012
VL 730
BP 661
EP 664
DI 10.1007/978-1-4419-7311-5_150
PG 4
WC Biology; Medicine, Research & Experimental
SC Life Sciences & Biomedicine - Other Topics; Research & Experimental
Medicine
GA BFV95
UT WOS:000321592700150
PM 22278587
ER
PT B
AU Hamilton, LJ
Williams, SA
Kamin, RA
Carr, MA
Caton, PA
Cowart, JS
AF Hamilton, Leonard J.
Williams, Sherry A.
Kamin, Richard A.
Carr, Matthew A.
Caton, Patrick A.
Cowart, Jim S.
GP ASME
TI RENEWABLE FUEL PERFORMANCE IN A LEGACY MILITARY DIESEL ENGINE
SO PROCEEDINGS OF THE ASME 5TH INTERNATIONAL CONFERENCE ON ENERGY
SUSTAINABILITY 2011, PTS A-C
LA English
DT Proceedings Paper
CT ASME 5th International Conference on Energy Sustainability
CY AUG 07-10, 2011
CL Washington, DC
SP ASME, Adv Energy Syst Div, ASME, Solar Energy Div
AB A new Hydrotreated Vegetable Oil (HVO) from the camelina plant has been processed into a Hydrotreated Renewable Jet (HRJ) fuel. This HRJ fuel was tested in an extensively instrumented legacy military diesel engine along with conventional Navy jet fuel JP-5. Both fuels performed well across the speed-load range of this HMMWV engine. The high cetane value of the HRJ leads to modestly shorter ignition delay. The longer ignition delay of JP-5 delivers shorter overall combustion durations, with associated higher indicated engine torque levels. Both brake torque and brake fuel consumption are better with conventional JP-5 by up to ten percent, due to more ideal combustion characteristics.
C1 [Hamilton, Leonard J.; Carr, Matthew A.; Caton, Patrick A.; Cowart, Jim S.] US Naval Acad, Annapolis, MD USA.
RP Hamilton, LJ (reprint author), US Naval Acad, Annapolis, MD USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5468-6
PY 2012
BP 1095
EP 1107
PG 13
WC Energy & Fuels; Engineering, Mechanical
SC Energy & Fuels; Engineering
GA BFR72
UT WOS:000321076700129
ER
PT S
AU Danilov, C
Henderson, TR
Goff, T
Brewer, O
Kim, JH
Macker, J
Adamson, B
AF Danilov, Claudiu
Henderson, Thomas R.
Goff, Thomas
Brewer, Orlie
Kim, Jae H.
Macker, Joseph
Adamson, Brian
GP IEEE
TI Adaptive Routing for Tactical Communications
SO 2012 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2012)
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM)
CY OCT 29-NOV 01, 2012
CL Orlando, FL
SP IEEE, AFCEA Int, IEEE Commun Soc
DE MANET; Wireless; Routing
AB We present a new approach to performing adaptive, loop-free, destination-based unicast forwarding in an IP-based network. The approach is an integration of several well-known techniques, including broadcast-based flooding, on-demand route discovery, and link state routing. In this approach, routers are not universally in one routing mode, such as a 'link-state', for all destinations but instead apply different forwarding strategies depending on the current route availability and quality on a perdestination basis. Furthermore, this approach extends well to traffic prioritized networks, since different forwarding mechanisms can be employed based on the priority of the flow. It also does not require tight coordination between routers on the routing mode being applied for a given destination. This allows parts of the topology to adapt to the local environment as it changes. In this paper we introduce the Adaptive Routing mechanism, evaluate its performance in a thirty-node mobile networking scenario, and discuss its applicability to tactical communications.
C1 [Danilov, Claudiu; Henderson, Thomas R.; Goff, Thomas; Brewer, Orlie; Kim, Jae H.] Boeing Res & Technol, POB 3707,MC 7L-49, Seattle, WA 98124 USA.
[Macker, Joseph; Adamson, Brian] Naval Res Lab, Washington, DC 20375 USA.
RP Danilov, C (reprint author), Boeing Res & Technol, POB 3707,MC 7L-49, Seattle, WA 98124 USA.
FU Office of Naval Research [N00173-09-C-4012]
FX This work was supported by Office of Naval Research contract
N00173-09-C-4012. The authors would like to thank Dr. Santanu Das and
Mr. John Moniz (ONR Program Managers) for their support, as well as Dr
Richard Edell for his guidance into the applicability of the protocols,
and David Claypool for designing the benchmark scenario.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4673-1729-0; 978-1-4673-1730-6
J9 IEEE MILIT COMMUN C
PY 2012
PG 7
WC Telecommunications
SC Telecommunications
GA BEY60
UT WOS:000318702900265
ER
PT S
AU Danilov, C
Henderson, TR
Brewer, O
Kim, JH
Macker, J
Adamson, B
AF Danilov, Claudiu
Henderson, Thomas R.
Brewer, Orlie
Kim, Jae H.
Macker, Joseph
Adamson, Brian
GP IEEE
TI Elastic Multicast for Tactical Communications
SO 2012 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2012)
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM)
CY OCT 29-NOV 01, 2012
CL Orlando, FL
SP IEEE, AFCEA Int, IEEE Commun Soc
DE Group Multicast; MANET; Routing
AB This paper presents a multicast routing mechanism supporting the classical IP multicast service model that can dynamically use redundant forwarding in the parts of the network affected by a high rate of topology changes, while converging to regular multicast distribution trees where or when the network becomes relatively stable. The rationale is that intermittent connectivity directly affects the ability of routers to synchronize on their view of the network, thus making it difficult to converge on efficient distribution trees, while network wide broadcast may be prohibitively expensive for relatively sparse groups. We describe a hybrid approach, called Elastic Multicast, which dynamically expands to limited scope broadcast when needed, and converges single path forwarding if the network is stable, through independent routing decisions made at each node.
C1 [Danilov, Claudiu; Henderson, Thomas R.; Brewer, Orlie; Kim, Jae H.] Boeing Res & Technol, POB 3707,MC 7L-49, Seattle, WA 98124 USA.
[Macker, Joseph; Adamson, Brian] Naval Res Lab, Washington, DC 20375 USA.
RP Danilov, C (reprint author), Boeing Res & Technol, POB 3707,MC 7L-49, Seattle, WA 98124 USA.
FU Office of Naval Research [N00173-09-C-4012]
FX This work was supported by Office of Naval Research contract
N00173-09-C-4012. The authors would like to thank Dr. Santanu Das and
Mr. John Moniz (ONR Program Managers) for their support, as well as Dr
Richard Edell for his guidance into the applicability of the protocols,
and David Claypool for designing the benchmark scenario.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4673-1729-0; 978-1-4673-1730-6
J9 IEEE MILIT COMMUN C
PY 2012
PG 6
WC Telecommunications
SC Telecommunications
GA BEY60
UT WOS:000318702900264
ER
PT S
AU Islam, MN
Balasubramanian, S
Mandayam, NB
Seskar, I
Kompella, S
AF Islam, Muhammad Nazmul
Balasubramanian, Shantharam
Mandayam, Narayan B.
Seskar, Ivan
Kompella, Sastry
GP IEEE
TI Implementation of Distributed Time Exchange Based Cooperative Forwarding
SO 2012 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2012)
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM)
CY OCT 29-NOV 01, 2012
CL Orlando, FL
SP IEEE, AFCEA Int, IEEE Commun Soc
DE Resource Delegation; Cooperative Forwarding; Global Control Plane;
Testbed Implementation; GNUradio
ID NETWORKS
AB In this paper, we design and implement time exchange (TE) based cooperative forwarding where nodes use transmission time slots as incentives for relaying. We focus on distributed joint time slot exchange and relay selection in the sum goodput maximization of the overall network. We formulate the design objective as a mixed integer nonlinear programming (MINLP) problem and provide a polynomial time distributed solution of the MINLP. We implement the designed algorithm in the software defined radio enabled USRP nodes of the ORBIT indoor wireless testbed. The ORBIT grid is used as a global control plane for exchange of control information between the USRP nodes. Experimental results suggest that TE can significantly increase the sum goodput of the network. We also demonstrate the performance of a goodput optimization algorithm that is proportionally fair.
C1 [Islam, Muhammad Nazmul; Balasubramanian, Shantharam; Mandayam, Narayan B.; Seskar, Ivan] Rutgers State Univ, Wireless Informat & Networking Lab, Piscataway, NJ 08855 USA.
[Kompella, Sastry] Naval Res Lab, Div Informat Technol, Washington, DC USA.
RP Islam, MN (reprint author), Rutgers State Univ, Wireless Informat & Networking Lab, Piscataway, NJ 08855 USA.
EM mnislam@winlab.rutgers.edu; shantharampsg@gmail.com;
narayan@winlab.rutgers.edu; seskar@winlab.rutgers.edu; sk@ieee.org
FU Office of Naval Research [N00014- 11- 1- 0132]
FX This work is supported by the Office of Naval Research under grant
N00014- 11- 1- 0132. We thank Kush Patel, Sid Paradkar and Hakim Ergaibi
for their assistance in GNUradio coding and testbed implementation.
NR 19
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4673-1729-0; 978-1-4673-1730-6
J9 IEEE MILIT COMMUN C
PY 2012
PG 6
WC Telecommunications
SC Telecommunications
GA BEY60
UT WOS:000318702900182
ER
PT S
AU Kam, C
Kompella, S
Nguyen, GD
Wieselthier, JE
Ephremides, A
AF Kam, Clement
Kompella, Sastry
Nguyen, Gam D.
Wieselthier, Jeffrey E.
Ephremides, Anthony
GP IEEE
TI Wireless Multicast with Cooperative Relaying
SO 2012 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2012)
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM)
CY OCT 29-NOV 01, 2012
CL Orlando, FL
SP IEEE, AFCEA Int, IEEE Commun Soc
ID MULTIPACKET RECEPTION; THROUGHPUT ANALYSIS; STABLE THROUGHPUT; PROTOCOL
DESIGN; SLOTTED ALOHA; STABILITY; ACCESS; CAPABILITY
AB In this work, we model a random access multicast network with cooperative relaying and analyze its throughput. The network consists of two source nodes and two destination nodes, where both source nodes generate data that needs to be transmitted to both destination nodes. We study the possibility that one of the sources can also act as a cooperative relay by transmitting some of the packets originating at the other source node. It is assumed that the destination nodes are equipped with multiuser detectors, and hence are capable of successfully decoding transmissions from multiple source nodes simultaneously (multipacket reception). We derive the achievable service rates for packets originating at each node in a system with cooperative relaying, and thereby compute the overall throughput region. Further analysis of the system (stability region) is reserved for future work.
C1 [Kam, Clement; Kompella, Sastry; Nguyen, Gam D.] USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
[Wieselthier, Jeffrey E.] Wieselthier Res, Silver Spring, MD USA.
[Ephremides, Anthony] Univ Maryland, Elect & Comp Engn Dept, College Pk, MD USA.
RP Kam, C (reprint author), USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
FU Office of Naval Research
FX This work was supported by the Office of Naval Research.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4673-1729-0; 978-1-4673-1730-6
J9 IEEE MILIT COMMUN C
PY 2012
PG 6
WC Telecommunications
SC Telecommunications
GA BEY60
UT WOS:000318702900115
ER
PT S
AU Liu, ZQ
Yang, TC
AF Liu, Zhiqiang
Yang, T. C.
GP IEEE
TI Time Reversal Multicarrier Communications over Long Multipath Fading
Channels
SO 2012 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2012)
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM)
CY OCT 29-NOV 01, 2012
CL Orlando, FL
SP IEEE, AFCEA Int, IEEE Commun Soc
AB Time-reversed orthogonal frequency division multiplexing (TR-OFDM) has recently received attention as a promising scheme for supporting single-input multiple-output (SIMO) communications over time-dispersive fading channels In TR-OFDM, the time reversal processing cleverly converts multiple time-dispersive fading channels associated with SIMO-OFDM into a single channel with generally smaller time dispersion and less fading. As a result, a moderate cyclic-prefix (CP) length can be used without inducing much inter-block interference (IBI) even when the original channels are long. This paper tackles a technical challenge critical to the success of TR-OFDM, that is, how to minimize the CP length while satisfying certain performance requirements. Based on a data model derived for TR-OFDM, a quantitative relationship between the CP length and error performance is first established and a design procedure is then proposed. Our design reveals that the optimal CP length depends on the power delay profiles of underlying channels. Both theoretical analysis and numerical simulations confirm the merits of our design.
C1 [Liu, Zhiqiang; Yang, T. C.] USN, Res Lab, Washington, DC 20375 USA.
RP Liu, ZQ (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4673-1729-0
J9 IEEE MILIT COMMUN C
PY 2012
PG 6
WC Telecommunications
SC Telecommunications
GA BEY60
UT WOS:000318702900001
ER
PT S
AU Macker, JP
Claypool, DJ
AF Macker, Joseph P.
Claypool, David J.
GP IEEE
TI Dynamic Communities in Evolving Network Graphs
SO 2012 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2012)
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM)
CY OCT 29-NOV 01, 2012
CL Orlando, FL
SP IEEE, AFCEA Int, IEEE Commun Soc
AB This work presents applied research using spectral graph partitioning to examine potential community structures in evolving graphs. In our early experiments, evolving graphs represent time varying models of mobile wireless communication networks but they could also represent more abstract architectural representations such as middleware topologies or social network dynamics. While in its technical infancy, mobile network community analysis is an important capability in network planning, management, and adaptation strategies. We first present some discussion and technical background required to describe the analytical components and dynamic network modeling techniques. A set of mobile network scenarios are then described and applied to demonstrate the use of the dynamic spectral partitionign methods. We also develop and present a potential aid to dynamically establish partition set size and introduce a heuristic metric for partitioning quality. Our dynamic network experiments are represented by a series of evolving weighted graphs with dynamic attribute data that we plan to use in future work to represent network neighbor quality effects or other metrics as deemed appropriate to the scenario. We conclude by reviewing results and discussing future work.
C1 [Macker, Joseph P.; Claypool, David J.] USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
RP Macker, JP (reprint author), USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
EM joseph.macker@nrl.navy.mil; david.claypool@nrl.navy.mil
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4673-1729-0
J9 IEEE MILIT COMMUN C
PY 2012
PG 6
WC Telecommunications
SC Telecommunications
GA BEY60
UT WOS:000318702900055
ER
PT S
AU Macker, JP
Adamson, B
Claypool, DJ
AF Macker, Joseph P.
Adamson, Brian
Claypool, David J.
GP IEEE
TI Temporal Stability for Dynamic Network Relay Sets
SO 2012 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2012)
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM)
CY OCT 29-NOV 01, 2012
CL Orlando, FL
SP IEEE, AFCEA Int, IEEE Commun Soc
AB Distributed relay set election instability within mobile networks can cause backbone topology changes that affect the performance of both unicast and multicast data routing algorithms. We discuss stability improvements to such relay set election by adding a "resistance to change" weighting factor to help reduce change in election results. In particular, we examine a proposed extension to the Essential Connected Dominating Set (ECDS) algorithm that has been specified for use by both present mobile ad hoc network unicast and multicast protocols. We demonstrate temporal stability improvements in the ECDS relay set membership that can be achieved with a simple modification to the election algorithm. Our results are particularly important when dealing with frequently changing election metrics represented in the priority field such as density or link quality as a weight metric. By using several mobile models of networks undergoing link quality fluctuations we demonstrate significant improvements in stability of the backbone set. Our results also indicate that we can maintain good stability results while maintaining a small relay set membership size as compared to the unmodified algorithm.
C1 [Macker, Joseph P.; Adamson, Brian; Claypool, David J.] USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
RP Macker, JP (reprint author), USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
EM joseph.macker@nrl.navy.mil; brian.adamson@nrl.navy.mil;
david.claypool@nrl.navy.mil
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4673-1729-0
J9 IEEE MILIT COMMUN C
PY 2012
PG 6
WC Telecommunications
SC Telecommunications
GA BEY60
UT WOS:000318702900056
ER
PT S
AU Robertson, A
Molnar, J
AF Robertson, Andrew
Molnar, Joseph
GP IEEE
TI The False Positive Congestion Problem and Probabilistic Spectrum Sensing
SO 2012 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2012)
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM)
CY OCT 29-NOV 01, 2012
CL Orlando, FL
SP IEEE, AFCEA Int, IEEE Commun Soc
DE spectrum sensing; dynamic spectrum access; clustering; cognitive radio
ID DETECTOR; SIZE
AB We assess the problem of band congestion due to spectrum sensing false positives combined with a guard-band policy. We calculate the size distribution of spectral white spaces to find that large fractions of a band can be wasted even for small probabilities of false positives in single bins. To ameliorate this problem, we propose an algorithm consisting of random bin sampling followed by density clustering. The clustering algorithm yields a dramatic enhancement of the false positive rejection rate due to large differences between the densities of true and false detections. Simultaneously, a reduction in sensing time is possible due to the fact that the number of randomly sampled bins need only be a small fraction of the total number of bins. We explain the theory behind this method, compare to simulation, and derive heuristic guidelines for its implementation.
C1 [Robertson, Andrew; Molnar, Joseph] USN, Res Lab, Networks & Commun Syst Branch, Washington, DC 20375 USA.
RP Robertson, A (reprint author), USN, Res Lab, Networks & Commun Syst Branch, Washington, DC 20375 USA.
NR 18
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4673-1729-0; 978-1-4673-1730-6
J9 IEEE MILIT COMMUN C
PY 2012
PG 6
WC Telecommunications
SC Telecommunications
GA BEY60
UT WOS:000318702900229
ER
PT S
AU Rohrer, JP
Pathapati, KS
Nguyen, TAN
Sterbenz, JPG
AF Rohrer, Justin P.
Pathapati, Kamakshi Sirisha
Nguyen, Truc Anh N.
Sterbenz, James P. G.
GP IEEE
TI Opportunistic Transport for Disrupted Airborne Networks
SO 2012 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2012)
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM)
CY OCT 29-NOV 01, 2012
CL Orlando, FL
SP IEEE, AFCEA Int, IEEE Commun Soc
AB Due to the challenging network conditions posed by a highly-dynamic airborne telemetry environment, it is essential for the transport protocol to provide automated mechanisms that dynamically adapt to changing end-to-end performance on any path. The AeroTP multi-mode transport protocol provides service tailored to the requirements of the telemetry mission control and data packets, achieving better performance compared to the traditional TCP and UDP. We use ns-3 to simulate the AeroTP protocol's reliable and quasi-reliable modes and demonstrate the performance tradeoffs between the modes, as well as comparing their performance with TCP and UDP.
C1 [Rohrer, Justin P.] USN, Postgrad Sch, Dept Comp Sci, Grad Sch Operat & Informat Sci, Monterey, CA 93943 USA.
[Pathapati, Kamakshi Sirisha; Nguyen, Truc Anh N.; Sterbenz, James P. G.] Univ Kansas, Informat & Telecommun Technol Ctr, Dept Elect Engn & Comp Sci, Lawrence, KS 66045 USA.
RP Rohrer, JP (reprint author), USN, Postgrad Sch, Dept Comp Sci, Grad Sch Operat & Informat Sci, Monterey, CA 93943 USA.
EM jprohrer@nps.edu; kamipks@ittc.ku.edu; annguyen@ittc.ku.edu;
jpgs@ittc.ku.edu
FU Test Resource Management Center ( TRMC) Testt and Evaluation/ Science
and Technology; T& E/ S& T Program through the Army PEO STRI Contracting
Office for AeroNP and AeroTP [W900KK- 09C- 0019]; International
Foundation for Telemetering ( IFT)
FX The authors would like to thank the Test Resource Management Center (
TRMC) Test and Evaluation/ Science and Technology ( T& E/ S& T) Program
for their support. This work was funded in part by the T& E/ S& T
Program through the Army PEO STRI Contracting Office, contract number
W900KK- 09C- 0019 for AeroNP and AeroTP: Aeronautical Network and
Transport Protocols for iNET ( ANTP). The Executing Agent and Program
Manager work out of the AFFTC. This work was also funded in part by the
International Foundation for Telemetering ( IFT). We would like to thank
Kip Temple and the membership of the iNET working group for discussions
that led to this work.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4673-1729-0; 978-1-4673-1730-6
J9 IEEE MILIT COMMUN C
PY 2012
PG 9
WC Telecommunications
SC Telecommunications
GA BEY60
UT WOS:000318702900020
ER
PT S
AU Rosenfeld, AM
Lass, RN
Ingram, DS
Regli, WC
Macker, JP
AF Rosenfeld, Aaron M.
Lass, Robert N.
Ingram, Dustin S.
Regli, William C.
Macker, Joseph P.
GP IEEE
TI A Comparison of Group-based Data Persistence Techniques in MANETs
SO 2012 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2012)
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM)
CY OCT 29-NOV 01, 2012
CL Orlando, FL
SP IEEE, AFCEA Int, IEEE Commun Soc
AB Maintaining a consistent set of state information across applications in tactical edge, mobile ad-hoc networks (MANETs) is a challenging, yet mission-critical task. This paper analyzes the performance and effectiveness of eight approaches to data persistence with three different persistence requirements. This is done by introducing COPE, a middleware framework for reliable data delivery that allows different protocols to be configured at runtime. Our empirical results provide a roadmap for selecting the best protocol for a given scenario.
C1 [Rosenfeld, Aaron M.; Lass, Robert N.; Ingram, Dustin S.; Regli, William C.] Drexel Univ, Dept Comp Sci, Philadelphia, PA 19104 USA.
[Macker, Joseph P.] Div Informat Technol, Naval Res Lab, Washington, DC USA.
RP Rosenfeld, AM (reprint author), Drexel Univ, Dept Comp Sci, Philadelphia, PA 19104 USA.
EM ar374@cs.drexel.edu; urlass@cs.drexel.edu; dustin@cs.drexel.edu;
regli@cs.drexel.edu; joseph.macker@nrl.navy.mil
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4673-1729-0; 978-1-4673-1730-6
J9 IEEE MILIT COMMUN C
PY 2012
PG 6
WC Telecommunications
SC Telecommunications
GA BEY60
UT WOS:000318702900037
ER
PT S
AU Shahan, P
Heide, DA
Cohen, AE
AF Shahan, Patrick
Heide, David A.
Cohen, Aaron E.
GP IEEE
TI COMPARISON OF TSVCIS VOICE AT 8000 AND 12000 BPS VERSUS CVSD AT 16000
BPS
SO 2012 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2012)
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM)
CY OCT 29-NOV 01, 2012
CL Orlando, FL
SP IEEE, AFCEA Int, IEEE Commun Soc
AB In this paper a novel technique for implementing heavily bit error protected 8 and 12 kilobits per second (kbps) voice coder (vocoder) based on a 2.4 kbps vocoder specified in Tactical Secure Voice Cryptographic Interoperability Specification (TSVCIS) is compared to the current 16 kbps Continuously Variable Slope Delta Modulation (CVSD) used in several legacy military radios and the Single Channel Ground and Airborne Radio System (SINCGARS). TSVCIS voice significantly outscored CVSD in terms of quality, using the Mean Opinion Score (MOS) and Diagnostic Acceptability Measure (DAM), and intelligibility, from the Diagnostic Rhyme Test (DRT). These tests show that TSVCIS voice delivers significantly higher quality and intelligibility than CVSD when transmitted over noisy communication channels.
C1 [Shahan, Patrick; Heide, David A.; Cohen, Aaron E.] USN, Res Lab, Washington Dc, DC 20375 USA.
RP Shahan, P (reprint author), USN, Res Lab, Code 5555,4555 Overlook Ave SW, Washington Dc, DC 20375 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4673-1729-0
J9 IEEE MILIT COMMUN C
PY 2012
PG 4
WC Telecommunications
SC Telecommunications
GA BEY60
UT WOS:000318702900005
ER
PT S
AU Wu, ZQ
Yang, TC
Liu, ZQ
Chakarvarthy, V
AF Wu, Zhiqiang
Yang, T. C.
Liu, Zhiqiang
Chakarvarthy, Vasu
GP IEEE
TI Modulation Detection of Underwater Acoustic Communication Signals
Through Cyclostationary Analysis
SO 2012 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2012)
SE IEEE Military Communications Conference
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference (MILCOM)
CY OCT 29-NOV 01, 2012
CL Orlando, FL
SP IEEE, AFCEA Int, IEEE Commun Soc
ID SEQUENCE SPREAD-SPECTRUM
AB Modulation detection is important to many military communication and electronic warfare applications. Cyclostationary analysis has been proven to be an effective means to detect and identify modulation types of RF signals. It is highly desired to apply cyclostationary analysis to underwater acoustic communication signals to conduct modulation detection. However, due to the complex environment encountered by underwater acoustic communication, the cyclostationary features of such signals are significantly different from those of their RF counterparts. In this paper, we analyze the applicability of cyclotationay analysis in underwater acoustic communication signals for modulation detection purpose. Due to the severe and varying Doppler shift and phase noise, the cyclostationary features of underwater acoustic communication signals require very high resolution. Employing previously developed low-complexity short-term dynamic resolution cyclostationary analysis algorithm, we first obtain a meaningful spectrum correlation function (SCF) feature with sufficient resolution in the cyclic frequency range of interest. We then extract a simple parameter, namely the cyclic frequency/frequency peak ratio (CFFPR), to identify the modulation schemes of the signals. This feature proves to be statistically significant and stable in distinguishing BPSK modulation and QPSK modulation. Real experimental data collected at sea are used to validate the effectiveness of the proposed algorithm.
C1 [Wu, Zhiqiang] Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
[Yang, T. C.] Sun Yet Sen Univ, Appl Marine Phys & Undersea Tech, Dayton, OH 45435 USA.
[Liu, Zhiqiang] Naval Res Lab, Acoust Div, Washington, DC 20375 USA.
[Chakarvarthy, Vasu] Air Force Res Lab, Sensors Directorate, Washington, DC 20375 USA.
RP Wu, ZQ (reprint author), Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA.
FU Office of Naval Research; Air Force Research Laboratory
FX This work is supported by the Office of Naval Research and the Air Force
Research Laboratory.
NR 17
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7578
BN 978-1-4673-1729-0; 978-1-4673-1730-6
J9 IEEE MILIT COMMUN C
PY 2012
PG 6
WC Telecommunications
SC Telecommunications
GA BEY60
UT WOS:000318702900272
ER
PT J
AU Nardon, L
Aten, K
AF Nardon, Luciara
Aten, Kathryn
TI Valuing Virtual Worlds: The Role of Categorization in Technology
Assessment
SO JOURNAL OF THE ASSOCIATION FOR INFORMATION SYSTEMS
LA English
DT Article
DE Virtual Worlds; Virtual Collaboration; Virtual Work; Technology
Acceptance; Technology Adoption; Categorization; Cognition
ID INFORMATION-TECHNOLOGY; USER ACCEPTANCE; PERCEIVED EASE; MODEL;
KNOWLEDGE; PRODUCTS; ANALOGY; FUTURE; FRAMES
AB Virtual worlds offer great potential for supporting the collaborative work of geographically distributed teams. However, reports indicate the existence of substantial barriers to the acceptance and use of virtual worlds in business settings. In this paper, we explore how individuals' interpretations of virtual worlds influence their judgments of the value of the technology. We conducted a qualitative analysis set in the context of a large computer and software company that was in the process of adopting virtual worlds for distributed collaboration. We identified interpretations of virtual worlds that suggest three mental categories: virtual worlds as a medium, virtual worlds as a place, and virtual worlds as an extension of reality. We associated these mental categories with different criteria for assessing the value of virtual worlds in a business setting. This study contributes particularly to the acceptance of virtual worlds but also more generally to the understanding of technology acceptance by demonstrating that the relative importance of the criteria for assessing a technology varies with potential users' interpretations and mental categorizations.
C1 [Nardon, Luciara] Carleton Univ, Sprott Sch Business, Ottawa, ON K1S 5B6, Canada.
[Aten, Kathryn] Naval Postgrad Sch, Grad Sch Business & Publ Policy, Monterey, CA USA.
RP Nardon, L (reprint author), Carleton Univ, Sprott Sch Business, Ottawa, ON K1S 5B6, Canada.
EM Luciara_nardon@carleton.ca; kjaten@nps.edu
OI Nardon, Luciara/0000-0001-8935-198X
NR 69
TC 4
Z9 4
U1 1
U2 20
PU ASSOC INFORMATION SYSTEMS
PI ATLANTA
PA GEORGIA STATE UNIV, 35 BROAD STREET, STE 916-917, ATLANTA, GA 30303 USA
SN 1536-9323
J9 J ASSOC INF SYST
JI J. Assoc. Inf. Syst.
PY 2012
VL 13
IS 10
SI SI
BP 772
EP 796
PG 25
WC Computer Science, Information Systems; Information Science & Library
Science
SC Computer Science; Information Science & Library Science
GA 183LH
UT WOS:000321815700004
ER
PT J
AU Gray, R
Tummala, M
McEachen, J
Scrofani, J
Garren, D
AF Gray, Ryan
Tummala, Murali
McEachen, John
Scrofani, James
Garren, David
BE Wysocki, BJ
Wysocki, TA
TI Identification and Classification of Orthogonal Frequency Division
Multiple Access Signals
SO 6TH INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING AND COMMUNICATION
SYSTEMS (ICSPCS'2012)
LA English
DT Proceedings Paper
CT 6th International Conference on Signal Processing and Communication
Systems (ICSPCS)
CY DEC 12-14, 2012
CL Gold Coast, AUSTRALIA
SP IEEE, IEEE Commun Soc, Univ Nebraska, Peter Kiewit Inst
DE Cyclostationary Feature Extraction; IEEE 802.16e; OFDMA; Signal
Classification; WiMAX
ID SYSTEMS
AB This paper proposes a scheme for identification and classification of Orthogonal Frequency Division Multiple Access (OFDMA) signals. Specifically, the cyclostationary pilot signature of an IEEE 802.16e standard compliant waveform is investigated. The proposed scheme performs waveform identification through a preamble cross-correlation technique. Classification is achieved through the use of a pilot cross-correlation technique in combination with cyclostationary feature extraction in order to determine the cyclic prefix of the IEEE 802.16e waveform. Similar methods are then used for determining other OFDMA waveform parameters, such as the FFT size, Segment number and IDcell. MATLAB simulation results validate the preamble cross-correlation and pilot cross-correlation techniques as effective methods of signal identification and classification, respectively.
C1 [Gray, Ryan; Tummala, Murali; McEachen, John; Scrofani, James; Garren, David] USN, Postgrad Sch, Monterey, CA 93943 USA.
RP Gray, R (reprint author), USN, Postgrad Sch, Monterey, CA 93943 USA.
EM rmgray@nps.edu; mtummala@nps.edu; mceachen@nps.edu; jwscrofa@nps.edu;
dagarren@nps.edu
NR 13
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-2393-2
PY 2012
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BFJ63
UT WOS:000320132400030
ER
PT J
AU Henderson, J
Tummala, M
McEachen, J
Scrofani, J
AF Henderson, Jason
Tummala, Murali
McEachen, John
Scrofani, James
BE Wysocki, BJ
Wysocki, TA
TI Scheme for Enhanced Tracking of Mobile Subscribers in a WiMAX Network
SO 6TH INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING AND COMMUNICATION
SYSTEMS (ICSPCS'2012)
LA English
DT Proceedings Paper
CT 6th International Conference on Signal Processing and Communication
Systems (ICSPCS)
CY DEC 12-14, 2012
CL Gold Coast, AUSTRALIA
SP IEEE, IEEE Commun Soc, Univ Nebraska, Peter Kiewit Inst
DE Geolocation; WiMAX; IEEE 802.16; Timing Adjust; hidden Markov model;
tracking
AB In this paper, the base station identification and timing adjust measurements are used to geolocate mobile subscribers in a WiMAX network. The uplink and downlink subframes of the physical layer and management messages of the medium access control layer are examined to extract the necessary data for geolocation. Using a hidden Markov model [1] based algorithm to estimate the track of the mobile subscriber, we demonstrate that the position error can be further reduced by incorporating timing adjust measurements. Simulation results of the proposed scheme are included to demonstrate the effectiveness of the combined use of base station ID and timing adjust measurements.
C1 [Henderson, Jason; Tummala, Murali; McEachen, John; Scrofani, James] USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
RP Henderson, J (reprint author), USN, Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
NR 6
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-2393-2
PY 2012
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BFJ63
UT WOS:000320132400020
ER
PT B
AU Inglis, RPS
Brenner, RP
Puzo, EL
Walker, TO
Anderson, CR
Thomas, RW
Martin, RK
AF Inglis, Robert Paul S.
Brenner, Ryan P.
Puzo, Erin L.
Walker, T. Owens, III
Anderson, Christopher R.
Thomas, Ryan W.
Martin, Richard K.
BE Wysocki, BJ
Wysocki, TA
TI A Secure Wireless Network for Roadside Surveillance using Radio
Tomographic Imaging
SO 6TH INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING AND COMMUNICATION
SYSTEMS (ICSPCS'2012)
LA English
DT Proceedings Paper
CT 6th International Conference on Signal Processing and Communication
Systems (ICSPCS)
CY DEC 12-14, 2012
CL Gold Coast, AUSTRALIA
SP IEEE, IEEE Commun Soc (ComSoc), Univ Nebraska, Peter Kiewit Inst
DE wireless sensor network (WSN); wireless security; radio tomographic
imaging (RTI); network tomography; jamming mitigation; node
authentication; transmission encryption
AB This paper proposes and demonstrates the novel application of a secure wireless sensor network for roadside surveillance and vehicular detection using radio tomographic imaging. Network architecture is based on the well-established Zigbee standard and medium access is provided through a time division multiple access scheme. Wireless security vulnerabilities are considered and a four-part security scheme is presented. Field test results are provided to validate both the baseline radio tomographic imaging functionality and the accompanying wireless sensor network security mechanisms.
C1 [Inglis, Robert Paul S.; Brenner, Ryan P.; Puzo, Erin L.; Walker, T. Owens, III; Anderson, Christopher R.] USN Acad, Dept Elect & Comp Engn, Annapolis, MD 21402 USA.
[Thomas, Ryan W.; Martin, Richard K.] Air Force Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH USA.
RP Inglis, RPS (reprint author), USN Acad, Dept Elect & Comp Engn, Annapolis, MD 21402 USA.
EM ofc23258@usna.edu; owalker@usna.edu; canderso@usna.edu;
richard.martin@afit.edu
NR 18
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-2393-2; 978-1-4673-2392-5
PY 2012
PG 8
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BFJ63
UT WOS:000320132400015
ER
PT J
AU McClintic, JQ
Tummala, M
McEachen, J
AF McClintic, J. Q.
Tummala, M.
McEachen, J.
BE Wysocki, BJ
Wysocki, TA
TI Correcting Refractive Dilution of Precision in Wireless Network
Geolocation Estimates
SO 6TH INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING AND COMMUNICATION
SYSTEMS (ICSPCS'2012)
LA English
DT Proceedings Paper
CT 6th International Conference on Signal Processing and Communication
Systems (ICSPCS)
CY DEC 12-14, 2012
CL Gold Coast, AUSTRALIA
SP IEEE, IEEE Commun Soc, Univ Nebraska, Peter Kiewit Inst
ID EQUATIONS; LOCATION
AB Obtaining precise geolocation estimates for mobile devices requires knowledge of the local propagation velocity of light. Under common atmospheric conditions, incorrect propagation velocity estimates introduce systemic dilution of precision using time difference of arrival techniques. Modeling local propagation velocity as a function of common local meteorological variables yields corrected velocity estimates directly applicable to existing algorithms. In a simulated wireless network, matching the refractivity assumed in computing estimated positions to the simulated environmental refractivity shows some evidence that gains in accuracy and precision are achievable.
C1 [McClintic, J. Q.; Tummala, M.; McEachen, J.] USN, Dept Elect & Comp Engn, Grad Sch Engn & Appl Sci, Postgrad Sch, Monterey, CA 93943 USA.
RP McClintic, JQ (reprint author), USN, Dept Elect & Comp Engn, Grad Sch Engn & Appl Sci, Postgrad Sch, Monterey, CA 93943 USA.
EM jqmcclin@nps.edu; mtummala@nps.edu; mceachen@nps.edu
NR 12
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-2393-2
PY 2012
PG 6
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BFJ63
UT WOS:000320132400031
ER
PT B
AU Simmonds, KE
Bagchi, A
Matic, P
Leung, AC
Pogue, WM
Thompson, AK
Strain, JC
Gauvin, JE
AF Simmonds, K. E.
Bagchi, A.
Matic, P.
Leung, A. C.
Pogue, W. M.
Thompson, A. K.
Strain, J. C.
Gauvin, J. E.
GP ASME
TI BLAST RESPONSE OF PROTECTIVE ARMOR CONCEPTS USING AN ARM SURROGATE
SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS
AND EXPOSITION 2010, VOL 2
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
(IMECE)
CY NOV 12-18, 2010
CL Vancouver, CANADA
SP Amer Soc Mech Engineers
ID AMPLIFICATION
C1 [Simmonds, K. E.; Bagchi, A.; Matic, P.; Leung, A. C.; Pogue, W. M.] Naval Res Lab, Washington, DC 20375 USA.
[Thompson, A. K.; Strain, J. C.] Alliant Tech Syst, Beltsville, MD 20705 USA.
[Gauvin, J. E.] SAIC, Washington, DC 20375 USA.
RP Simmonds, KE (reprint author), Naval Res Lab, Washington, DC 20375 USA.
NR 7
TC 0
Z9 0
U1 1
U2 3
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4426-7
PY 2012
BP 115
EP 117
PG 3
WC Biotechnology & Applied Microbiology; Engineering, Biomedical;
Engineering, Mechanical
SC Biotechnology & Applied Microbiology; Engineering
GA BFJ68
UT WOS:000320140200017
ER
PT B
AU Ford, M
Bagchi, A
Simmonds, K
Gauvin, J
Matic, P
AF Ford, Matthew
Bagchi, Amit
Simmonds, Kirth
Gauvin, John
Matic, Peter
GP ASME
TI SURROGATE SKULL-BRAIN RESPONSE TO A PRESSURE WAVE
SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS
AND EXPOSITION 2010, VOL 2
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
(IMECE)
CY NOV 12-18, 2010
CL Vancouver, CANADA
SP Amer Soc Mech Engineers
C1 [Ford, Matthew; Gauvin, John] Sci Applicat Int Corp, Washington, DC 20001 USA.
[Bagchi, Amit; Simmonds, Kirth; Matic, Peter] US Naval Res Lab, Washington, DC USA.
RP Ford, M (reprint author), Sci Applicat Int Corp, Washington, DC 20001 USA.
NR 6
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4426-7
PY 2012
BP 119
EP 121
PG 3
WC Biotechnology & Applied Microbiology; Engineering, Biomedical;
Engineering, Mechanical
SC Biotechnology & Applied Microbiology; Engineering
GA BFJ68
UT WOS:000320140200018
ER
PT B
AU Hashemi, N
Howell, PB
Ligler, FS
AF Hashemi, Nastaran
Howell, Peter B., Jr.
Ligler, Frances S.
GP ASME
TI MICROFLOW CYTOMETER: HYDRODYNAMIC FOCUSING AND SEPARATION OF SAMPLE
STREAM
SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS
AND EXPOSITION 2010, VOL 2
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
(IMECE)
CY NOV 12-18, 2010
CL Vancouver, CANADA
SP Amer Soc Mech Engineers
ID CELLS; MICROCHANNELS; SYSTEMS; GROOVES; CHANNEL; FORCE; MIXER; CHIP
AB Using grooves in the walls of a microchannel and two sheath streams, we have passively focused a sample stream in the center of the microchannel for optical analysis. Even though the sample stream is completely surrounded by sheath fluid, reversing the orientation of the grooves in the channel walls returns the sample stream to its original position with respect to the sheath streams. The use of this sheathing technique has already been demonstrated in a sensitive microflow cytometer; the unsheathing capability now provides the opportunity to recover particles from the sensor with minimal dilution or to recycle the sheath fluid for long-term unattended operation. The ability to reverse focused laminar flows opens a variety of options for combining target transport, processing and analysis procedures.
C1 [Hashemi, Nastaran; Howell, Peter B., Jr.; Ligler, Frances S.] USN, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC 20375 USA.
RP Hashemi, N (reprint author), USN, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC 20375 USA.
EM nastaran.hashemi.ctr@nrl.navy.mil; peter.howell@nrl.navy.mil;
fran.ligler@nrl.navy.mil
RI Hashemi, Nastaran/A-7645-2012
OI Hashemi, Nastaran/0000-0001-8921-7588
NR 30
TC 0
Z9 0
U1 0
U2 3
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4426-7
PY 2012
BP 291
EP 296
PG 6
WC Biotechnology & Applied Microbiology; Engineering, Biomedical;
Engineering, Mechanical
SC Biotechnology & Applied Microbiology; Engineering
GA BFJ68
UT WOS:000320140200044
ER
PT B
AU Driscoll, MJ
McFetridge, EM
Patterson, JS
See, CA
AF Driscoll, Matthew J.
McFetridge, Eric M.
Patterson, Jeffrey S.
See, Craig A.
GP ASME
TI Removals for Cause: A 35 Year Assessment of LM2500 Engine Removals by
the United States Navy
SO PROCEEDINGS OF THE ASME TURBO EXPO 2011, VOL 4
LA English
DT Proceedings Paper
CT ASME Turbo Expo 2011
CY JUN 06-10, 2011
CL Vancouver, CANADA
SP ASME, Int Gas Turbine Inst
AB The United States (US) Navy has operated the General Electric LM2500 gas turbine on all its surface combatants for the past 35 years. The LM2500 is utilized as the propulsion engine aboard the US Navy's newest surface combatants including the FFG 7, CG 47 and DDG 51 Class ships. The US Navy owns and operates 400 LM2500 engines. An on-condition maintenance philosophy is employed whereby engines are run-to-failure rather than removed from service upon achieving some operating milestone. This paper assesses the reasons for the removal of the US Navy's LM2500s over their entire service life with a focus on how fleet maintenance capabilities have impacted and affected the cause for engine replacements over time.
C1 [Driscoll, Matthew J.; McFetridge, Eric M.; Patterson, Jeffrey S.] USN, Ctr Surface Warfare, Carderock Div, Philadelphia, PA USA.
RP Driscoll, MJ (reprint author), USN, Ctr Surface Warfare, Carderock Div, Philadelphia, PA USA.
NR 1
TC 0
Z9 0
U1 1
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5464-8
PY 2012
BP 799
EP 808
PG 10
WC Engineering, Mechanical
SC Engineering
GA BFO07
UT WOS:000320677400076
ER
PT B
AU Halpin, R
Sapienza, F
AF Halpin, Richard
Sapienza, Frank
GP ASME
TI Integrating A Hybrid Electric Drive Propulsion System with the Existing
DDG 51 Class Machinery Control System
SO PROCEEDINGS OF THE ASME TURBO EXPO 2011, VOL 4
LA English
DT Proceedings Paper
CT ASME Turbo Expo 2011
CY JUN 06-10, 2011
CL Vancouver, CANADA
SP ASME, Int Gas Turbine Inst
AB The destroyers of the USS Arleigh Burke Class all have 4 propulsion gas turbines and 3 gas turbine generators (GTGs). A typical at-sea "condition 3" operating profile consists of having 2 gas turbine generators running at approximately 50% capacity, and one propulsion gas turbine online at low to intermediate ship speeds. Having 2 GTGs online at all times at 50% load each provides the obvious advantage of maintaining all electric loads should one GTG shut down unexpectedly. This luxury does come at the cost of fuel efficiency, as gas turbines efficiency improves continuously as they move away from idle.
On the propulsion end, a single gas turbine is capable of generating enough horsepower to propel the ship at speeds in excess of 20 knots. Depending upon the specific mission that the destroyer may be on, however, quite a bit of operating profile may be at speeds below 15 knots where the LM2500 is operating at less than 20% capacity. In this range of operation specific fuel consumption ratios are also relatively low.
The proposed Hybrid Electric Drive (HED) system has the potential to address both of these inefficient ranges of operation. By installing one 2000 horsepower electric motor on each shaft, the electric motors can be used to propel the ship at speeds below 14 knots (projected) while running the GTGs up to 90% operating range where they are most efficient. The LM2500 is shut down completely at this range, and the potential fuel savings in this configuration is substantial.
While there are many engineering challenges with installing such a HED system on board an in-service DDG, the focus of this paper is on how to integrate HED with the existing Machinery Control System (MCS). Such challenges include interfacing MCS to the HED supervisory controller, developing a new HED control interface for the propulsion control operator, integrating HED into the existing shaft speed control algorithm, transitioning to and from HED propulsion, and updating data logging to include HED. Managing the interface between current electric load, changing electric loads, and current available BED power will also be addressed.
C1 [Halpin, Richard; Sapienza, Frank] Naval Surface Warfare Ctr, Carderock Div, Philadelphia, PA USA.
RP Halpin, R (reprint author), Naval Surface Warfare Ctr, Carderock Div, Philadelphia, PA USA.
NR 0
TC 0
Z9 0
U1 3
U2 4
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5464-8
PY 2012
BP 853
EP 859
PG 7
WC Engineering, Mechanical
SC Engineering
GA BFO07
UT WOS:000320677400082
ER
PT B
AU Volino, RJ
AF Volino, Ralph J.
GP ASME
TI COMBINED EFFECTS OF WAKES AND PULSED VORTEX GENERATOR JET FLOW CONTROL
ON BOUNDARY LAYER SEPARATION ON A VERY HIGH LIFT LOW PRESSURE TURBINE
AIRFOIL
SO PROCEEDINGS OF THE ASME TURBO EXPO 2011, VOL 5, PTS A AND B
LA English
DT Proceedings Paper
CT ASME Turbo Expo 2011
CY JUN 06-10, 2011
CL Vancouver, CANADA
SP ASME, Int Gas Turbine Inst
ID TRANSITION; BLADE; SURFACE; REGION
AB Boundary layer separation control with pulsed vortex generator jets (VGJs) has been studied on a very high lift, low-pressure turbine airfoil in the presence of unsteady wakes. Experiments were done under low (0.6%) and high (4%) freestream turbulence conditions on a linear cascade in a low speed wind tunnel. Cases were considered at Reynolds numbers (based on the suction surface length and the nominal exit velocity from the cascade) of 25,000 and 50,000. Wakes were produced from moving rods upstream of the cascade with flow coefficient 1.13 and rod spacing equal 2 blade pitches, resulting in a dimensionless wake passing frequency F=fL(j-te)/U-ave=0.14, where f is the frequency, Lj-te is the length of the adverse pressure gradient region on the suction surface, and U-ave is the average freestream velocity. The VGJs were injected at the beginning of the adverse pressure gradient region on the suction surface with maximum jet velocity in each pulse equal to the local freestream velocity and a jet duty cycle of 10%. Several different timings of the VGJs with respect to the wakes were considered. Pressure surveys on the airfoil surface and downstream total pressure loss surveys were documented. Instantaneous velocity profile measurements were acquired in the suction surface boundary layer and downstream of the cascade. In cases without VGJs, the boundary layer momentarily reattached in response to the wake passing, but separated between wakes. The VGJs also caused reattachment, and if the VGJ pulsing frequency was sufficiently high, separation was largely suppressed for the full wake passing cycle. The timing of the VGJs with respect to the wakes was not very important. The jet pulsing frequency needed for separation control was about the same as found previously in cases without wakes. The background freestream turbulence effect was negligible in the presence of the larger wake and VGJ disturbances.
C1 USN Acad, Dept Mech Engn, Annapolis, MD 21402 USA.
RP Volino, RJ (reprint author), USN Acad, Dept Mech Engn, Annapolis, MD 21402 USA.
EM volino@usna.edu
NR 43
TC 0
Z9 0
U1 1
U2 6
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5465-5
PY 2012
BP 1847
EP 1858
PG 12
WC Engineering, Mechanical
SC Engineering
GA BFR71
UT WOS:000321076300163
ER
PT J
AU Meger, RA
Cairns, R
Douglass, S
Huhman, B
Neri, J
Jones, H
Cooper, K
Feng, J
Brintlinger, T
Sprague, J
Michopoulos, J
Young, M
DeGiorgi, V
Leung, A
Baucom, J
Wimmer, S
AF Meger, R. A.
Cairns, R.
Douglass, S.
Huhman, B.
Neri, J.
Jones, H.
Cooper, K.
Feng, J.
Brintlinger, T.
Sprague, J.
Michopoulos, J.
Young, M.
DeGiorgi, V.
Leung, A.
Baucom, J.
Wimmer, S.
BE Fair, HD
TI EM Gun Bore Life Experiments at the Naval Research Laboratory
SO 2012 16TH INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC LAUNCH TECHNOLOGY
(EML)
LA English
DT Proceedings Paper
CT 16th IEEE International Symposium on Electromagnetic Launch (EML)
Technology
CY MAY 15-19, 2012
CL Inst Strateg & Innovat Technologies (ISIT), Beijing, PEOPLES R CHINA
SP IEEE, China Electrotechn Soc (CES), IEEE Nucl & Plasma Sci Soc
HO Inst Strateg & Innovat Technologies (ISIT)
ID ARMATURE; TRANSITION; RAIL
AB The Naval Research Laboratory (NRL) performs basic and applied research on high power railguns as part of the US Navy EM Launcher program. The understanding of damage mechanisms as a function of armature and barrel materials, launch parameters, and bore geometry is of primary interest to the development of a viable high power railgun. Research is performed on a 6-m, 1.5 MJ railgun located at NRL. Barrel studies utilize in situ diagnostics coupled with detailed ex situ analysis of rail materials to provide clues to the conditions present during launch. Results are compared with coupled 3-D electromagnetic and mechanical Finite Element Analysis (FEA) models of railgun operation. Results of several experiments on rail wear will be discussed.
C1 [Meger, R. A.; Huhman, B.; Neri, J.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Meger, RA (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RI Michopoulos, John/D-6704-2016
OI Michopoulos, John/0000-0001-7004-6838
NR 13
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0305-7
PY 2012
PG 6
WC Engineering, Electrical & Electronic
SC Engineering
GA BFM95
UT WOS:000320580800171
ER
PT J
AU Meger, RA
Huhman, B
Neri, J
Brintlinger, T
Jones, H
Cairns, R
Douglass, S
Lockner, T
Sprague, J
AF Meger, R. A.
Huhman, B.
Neri, J.
Brintlinger, T.
Jones, H.
Cairns, R.
Douglass, S.
Lockner, T.
Sprague, J.
BE Fair, HD
TI NRL Materials Testing Facility
SO 2012 16TH INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC LAUNCH TECHNOLOGY
(EML)
LA English
DT Proceedings Paper
CT 16th IEEE International Symposium on Electromagnetic Launch (EML)
Technology
CY MAY 15-19, 2012
CL Inst Strateg & Innovat Technologies (ISIT), Beijing, PEOPLES R CHINA
SP IEEE, China Electrotechn Soc (CES), IEEE Nucl & Plasma Sci Soc
HO Inst Strateg & Innovat Technologies (ISIT)
AB The Naval Research Laboratory performs basic research on high power railgun electric launchers. The program uses a 1.5-MJ, 2.5 km/s launch velocity railgun located in NRL's Materials Testing Facility. The railgun consists of an 11-MJ capacitive energy store configured as 22, 0.5-MJ modules. Each bank module has an independently triggered thyristor switch, series inductor, and crowbar diode and is joined to the railgun breech with coaxial cables. Individual bank timing and charge levels can be set to produce up to 1.5 MA peak current and 4-5 ms long current pulses. The 6-m long railgun used a nominally 5 cm bore diameter with steel or copper rails and epoxy laminate insulators. The muzzle contains a Tungsten-Copper arc horn to minimize damage from residual drive current upon launch. Aluminum armatures with acrylic bore riders are used for the launch package. Launch data is recorded digitally and analyzed using in-house computer codes. The system design and operation will be discussed.
C1 [Meger, R. A.; Huhman, B.; Neri, J.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Meger, RA (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
NR 6
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0305-7
PY 2012
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BFM95
UT WOS:000320580800172
ER
PT S
AU Severinghaus, R
Tummala, M
McEachen, J
AF Severinghaus, Robert
Tummala, Murali
McEachen, John
BE Matthews, MB
TI Performance of Asymmetric Antenna Configurations in Polarized Channels
SO 2012 CONFERENCE RECORD OF THE FORTY SIXTH ASILOMAR CONFERENCE ON
SIGNALS, SYSTEMS AND COMPUTERS (ASILOMAR)
SE Conference Record of the Asilomar Conference on Signals Systems and
Computers
LA English
DT Proceedings Paper
CT 46th Asilomar Conference on Signals, Systems and Computers
CY NOV 04-07, 2012
CL Pacific Grove, CA
SP Naval Postgraduate Sch, ATK Miss Res, IEEE Signal Proc Soc
ID WIRELESS COMMUNICATIONS; DIVERSITY
AB Small receivers can use dual polarization antennas to maximize received energy from single polarization transmitters. This paper analyzes the performance of these asymmetric MIMO antenna configurations in polarized, uncorrelated Rayleigh fading channels. Because the receiver can have knowledge of the channel's cross polar ratio, a polarization reciprocity scheme is developed. This is shown to maximize signal energy at the uplink receiver for all polarized channels. Simulations then show the symbol error probability and relationships to the channel cross-polar ratio and the number of transmitting antennas. Also, the use of Alamouti coding in a dual polarization uplink and in combination with the polarization reciprocity scheme is analyzed.
C1 [Severinghaus, Robert; Tummala, Murali; McEachen, John] Naval Postgrad Sch, Monterey, CA 93943 USA.
RP Severinghaus, R (reprint author), Naval Postgrad Sch, Monterey, CA 93943 USA.
EM rseverin@nps.edu; mtummala@nps.edu; mceachen@nps.edu
NR 9
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1058-6393
BN 978-1-4673-5051-8
J9 CONF REC ASILOMAR C
PY 2012
BP 499
EP 503
PG 5
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BFO76
UT WOS:000320768400092
ER
PT S
AU Bordonaro, SV
Willett, P
Bar-Shalom, Y
AF Bordonaro, Steven V.
Willett, Peter
Bar-Shalom, Yaakov
BE Matthews, MB
TI Consistent Linear Tracker with Position and Range Rate Measurements
SO 2012 CONFERENCE RECORD OF THE FORTY SIXTH ASILOMAR CONFERENCE ON
SIGNALS, SYSTEMS AND COMPUTERS (ASILOMAR)
SE Conference Record of the Asilomar Conference on Signals Systems and
Computers
LA English
DT Proceedings Paper
CT 46th Asilomar Conference on Signals, Systems and Computers
CY NOV 04-07, 2012
CL Pacific Grove, CA
SP Naval Postgraduate Sch, ATK Miss Res, IEEE Signal Proc Soc
AB In active sonar and radar applications measurements consist of range, bearing and often range rate. When tracking using range and bearing measurements only, the performance of a Converted Measurement Kalman Filter (CMFK) exceeds that of a mixed coordinate Extended Kalman Filter (EKF) if an unbiased conversion from polar to Cartesian coordinates is used. Performance is further enhanced if estimation bias is eliminated by evaluating the converted measurement error covariance using the state prediction. The extension of the CMKF to use range rate as a linear measurement is possible, but limited to cases with small bearing errors. The use of range rate as a nonlinear measurement requires the use of an EKF. Due to the poor performance of the EKF in some situations, various modifications have been proposed, including use of a pseudo measurement, an alternative linearization of the measurement prediction function, and sequentially processing the converted position and range rate measurements (applied to the EKF and the Unscented Kalman Filter). Common to these approaches is that the measurement prediction function remains nonlinear. The goal of this work is to develop a measurement conversion from range, bearing and range rate to Cartesian position and velocity that is unbiased and consistent. The approach is then applied to a CMKF with appropriate elimination of conversion bias and estimation bias. Performance is compared to the conventional EKF and the EKF with alternative linearization (AEKF).
C1 [Bordonaro, Steven V.] Naval Undersea Warfare Ctr, Newport, RI 02841 USA.
[Willett, Peter; Bar-Shalom, Yaakov] Univ Connecticut, Dept Elect & Comp Engn, Storrs, CT 06269 USA.
RP Bordonaro, SV (reprint author), Naval Undersea Warfare Ctr, Newport, RI 02841 USA.
EM steven.bordonaro@navy.mil; willett@engr.uconn.edu; ybs@engr.uconn.edu
OI Willett, Peter/0000-0001-8443-5586
FU [ARO-W911NF-10-1-0369]; [ONR-N00014-09-1-0613];
[ONR-N00014-10-1-0029]; [ONR-N00014-10-1-0412]
FX Supported in part by Grants ARO-W911NF-10-1-0369, ONR-N00014-09-1-0613,
ONR-N00014-10-1-0029 and ONR- N00014-10-1-0412.
NR 11
TC 4
Z9 4
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1058-6393
BN 978-1-4673-5051-8
J9 CONF REC ASILOMAR C
PY 2012
BP 880
EP 884
PG 5
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BFO76
UT WOS:000320768400163
ER
PT S
AU Wagner, KT
Doroslovacki, MI
AF Wagner, Kevin T.
Doroslovacki, Milos I.
BE Matthews, MB
TI COMPLEX COLORED WATER-FILLING ALGORITHM FOR GAIN ALLOCATION IN
PROPORTIONATE ADAPTIVE FILTERING
SO 2012 CONFERENCE RECORD OF THE FORTY SIXTH ASILOMAR CONFERENCE ON
SIGNALS, SYSTEMS AND COMPUTERS (ASILOMAR)
SE Conference Record of the Asilomar Conference on Signals Systems and
Computers
LA English
DT Proceedings Paper
CT 46th Asilomar Conference on Signals, Systems and Computers
CY NOV 04-07, 2012
CL Pacific Grove, CA
SP Naval Postgraduate Sch, ATK Miss Res, IEEE Signal Proc Soc
DE Adaptive Estimation; Adaptive Filters; Least Mean Square Methods
AB A complex colored water-filling algorithm is derived for gain allocation in proportionate-type NLMS filtering under the assumption that the input signal is Gaussian and the covariance and pseudo-covariance are known. The algorithm is derived by minimizing the mean square weight deviation at every time instance, where the weight deviation is defined as the difference between the unknown impulse response and the estimated impulse response at the current time. A single real-valued gain is used to simultaneously update both the real and imaginary parts of the estimated impulse response. The performance of the new algorithm is compared with the performance of several standard proportionate-type normalized least mean square algorithms for colored input.
C1 [Wagner, Kevin T.] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
[Doroslovacki, Milos I.] George Washington Univ, Dept Elect & Comp Engn, Washington, DC 20052 USA.
RP Wagner, KT (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
NR 8
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1058-6393
BN 978-1-4673-5051-8
J9 CONF REC ASILOMAR C
PY 2012
BP 1802
EP 1806
PG 5
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BFO76
UT WOS:000320768400335
ER
PT S
AU Tan, S
Piepmeier, JA
Kriebel, DL
AF Tan, Sam
Piepmeier, Jenelle Armstrong
Kriebel, David L.
BE Matthews, MB
TI A Computer Vision System for Monitoring Vessel Motion in Conjunction
with Vessel Wake Measurements
SO 2012 CONFERENCE RECORD OF THE FORTY SIXTH ASILOMAR CONFERENCE ON
SIGNALS, SYSTEMS AND COMPUTERS (ASILOMAR)
SE Conference Record of the Asilomar Conference on Signals Systems and
Computers
LA English
DT Proceedings Paper
CT 46th Asilomar Conference on Signals, Systems and Computers
CY NOV 04-07, 2012
CL Pacific Grove, CA
SP Naval Postgraduate Sch, ATK Miss Res, IEEE Signal Proc Soc
DE vision-based vessel tracking; wave measurements
AB This study seeks to establish a new and efficient method of conducting vessel wake studies by means of a vision-based vessel tracking tool that computes vessel parameters such as speed and length. When correlated with wave height measurements, the data facilitates a unified formulation of equations to calculate ship-generated wave heights over a broader range of vessel sizes and boating speeds than previous models. Using this tool, a sizable database of vessel types and wave height measurements are acquired to provide additional data points to improve existing prediction models.
C1 [Tan, Sam; Piepmeier, Jenelle Armstrong; Kriebel, David L.] US Naval Acad, Annapolis, MD USA.
RP Tan, S (reprint author), US Naval Acad, Annapolis, MD USA.
NR 7
TC 0
Z9 0
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1058-6393
BN 978-1-4673-5051-8
J9 CONF REC ASILOMAR C
PY 2012
BP 1830
EP 1834
PG 5
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BFO76
UT WOS:000320768400340
ER
PT B
AU Cavallaro, PV
Sadegh, AM
AF Cavallaro, Paul V.
Sadegh, Ali M.
GP ASME
TI CRIMP-IMBALANCED PROTECTIVE (CRIMP) FABRICS
SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS
AND EXPOSITION (IMECE 2010), VOL 9
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
(IMECE)
CY NOV 12-18, 2010
CL Vancouver, CANADA
SP Amer Soc Mech Engineers
ID BALLISTIC IMPACT BEHAVIOR; ENERGY-ABSORPTION; WOVEN FABRICS;
ANALYTICAL-MODEL; PERFORMANCE; FRICTION; ARMOR; PERFORATION; SYSTEM
AB This report documents research that was conducted to explore the unique concept of using crimp imbalance, which is a simple architectural modification achieved during the weaving process, as a potential mechanism to enhance fragmentation and ballistic protection levels of single-ply woven fabrics. It is shown in this report that crimp imbalance (1) can substantially influence the energy-absorption levels of single-ply fabrics for select fragment simulating projectile (FSP) velocities and friction coefficients; (2) can be tailored to controllably delay stress-wave propagations among yarn directions; and (3) can minimize reflections at the yarn crossover regions. This research, which used numerical models of single ply, plain-woven fabric, demonstrated that deviations in crimp contents can have significant effects on energy absorptions and projectile residual velocities; in short, optimal levels of crimp imbalance may exist for a specific ballistic threat type.
C1 [Cavallaro, Paul V.] USN, Undersea Warfare Ctr, Div Newport, Newport, RI 02841 USA.
RP Cavallaro, PV (reprint author), USN, Undersea Warfare Ctr, Div Newport, Newport, RI 02841 USA.
NR 34
TC 0
Z9 0
U1 0
U2 2
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4446-5
PY 2012
BP 331
EP 349
PG 19
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA BFM23
UT WOS:000320481000041
ER
PT B
AU Qidwai, MAS
DeGiorgi, VG
AF Qidwai, M. A. Siddiq
DeGiorgi, Virginia G.
GP ASME
TI FINITE ELEMENT ANALYSIS OF COMPOSITE PIEZOELECTRIC ACTUATORS
INCORPORATING NONLINEAR MATERIAL BEHAVIOR
SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS
AND EXPOSITION (IMECE 2010), VOL 9
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
(IMECE)
CY NOV 12-18, 2010
CL Vancouver, CANADA
SP Amer Soc Mech Engineers
ID BIMORPHS
AB There is always the question of choosing the appropriate constitutive model when simulating and analyzing piezoelectric material performance. Linear material modeling typically requires less computational resources; however this approach may not accurately capture the performance. In this paper, the scope of linear predictive modeling was analyzed by comparison with nonlinear modeling. Monomorph and bimorph actuators were modeled with each approach, and their respective performances were compared. It was found that even under small magnitudes of electric field, differences arise between the two approaches. The magnitude of the deviations depended upon actuator composition, applied electric field and boundary conditions. The impact of these differences can be considerable, such as for precision-based applications and cyclic applications where initial design errors could compound.
C1 [Qidwai, M. A. Siddiq] USN, Sci Applicat Int Corp, Res Lab, Washington, DC 20375 USA.
RP Qidwai, MAS (reprint author), USN, Sci Applicat Int Corp, Res Lab, Code 6350 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM muhammad.a.qidwai@nrl.navy.mil; virginia.g.degiorgi@nrl.navy.mil
NR 7
TC 0
Z9 0
U1 0
U2 3
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4446-5
PY 2012
BP 405
EP 416
PG 12
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA BFM23
UT WOS:000320481000050
ER
PT J
AU Ancona, MG
AF Ancona, M. G.
GP IEEE
TI Fully Coupled Thermoelectroelastic Simulations of GaN Devices
SO 2012 IEEE INTERNATIONAL ELECTRON DEVICES MEETING (IEDM)
LA English
DT Proceedings Paper
CT IEEE International Electron Devices Meeting (IEDM)
CY DEC 10-13, 2012
CL San Francisco, CA
SP IEEE
AB The continuum equations describing the fully coupled electrical, mechanical and thermal behaviors of GaN devices are presented and illustrated with a variety of examples from RF and power electronics.
C1 Naval Res Lab, Washington, DC USA.
RP Ancona, MG (reprint author), Naval Res Lab, Code 6876, Washington, DC USA.
EM ancona@estd.nrl.navy.mil
NR 8
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-4870-6
PY 2012
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BFN41
UT WOS:000320615600080
ER
PT B
AU Cai, LW
Orris, GJ
Calvo, DC
Nicholas, M
AF Cai, Liang-Wu
Orris, Gregory J.
Calvo, David C.
Nicholas, Michael
GP ASME
TI ACOUSTICAL SCATTERING BY SPHERICAL OBJECTS CONTAINING ELECTRORHEOLOGICAL
FLUID LAYERS
SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS
AND EXPOSITION 2010, VOL 13
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
(IMECE)
CY NOV 12-18, 2010
CL Vancouver, CANADA
SP Amer Soc Mech Engineers
AB In an effort to explore the mechanism to exert control over the band gap in phononic structures or acoustic metamaterials, a layer of electrorheological (ER) fluid is introduced into a spherical scatterer The ER fluids have the capability of changing the mechanical properties from fluid-like into a solid-like material in a matter of milliseconds. It is expected that such significant changes in the material properties would afford a range of significant opportunities for tuning the band gap. In this study, numerical analysis of acoustical scattering characteristics of such scatterers in a underwater environment is explored The ER fluid layer is encased between a solid steel core and a steel shell, which provide electrodes to electrify the ER fluid The ER fluid, both before and after the electrification is modeled as viscoelastic solid in order to account for its capability for sustaining the shear wave. Effects of externally applied electric field on the scattering characteristics are observed
C1 [Cai, Liang-Wu] Kansas State Univ, Dept Mech & Nucl Engn, Manhattan, KS 66506 USA.
[Orris, Gregory J.; Calvo, David C.; Nicholas, Michael] Naval Res Lab, Acoust Div, Washington, DC 20375 USA.
RP Cai, LW (reprint author), Kansas State Univ, Dept Mech & Nucl Engn, Manhattan, KS 66506 USA.
EM cai@ksu.edu
FU Office of Naval Research [N000140910546]
FX The work was sponsored by the Office of Naval Research under Grant No.
N000140910546. The authors would like to acknowledge the contributions
by their former colleague Dr. Dacio K. Dacol, who retired from the Naval
Research Laboratory in 2009.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4450-2
PY 2012
BP 413
EP +
PG 3
WC Engineering, Mechanical
SC Engineering
GA BFJ73
UT WOS:000320140700054
ER
PT B
AU Wimmer, SA
DeGiorgi, VG
Pan, MJ
AF Wimmer, Stephanie A.
DeGiorgi, Virginia G.
Pan, Ming-Jen
GP ASME
TI COMPUTATIONAL MODELING OF LAMINATION OF TAPE CASTED CERAMICS WITH A
FUGITIVE PHASE
SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS
AND EXPOSITION 2010, VOL 3, PTS A AND B
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
(IMECE)
CY NOV 12-18, 2010
CL Vancouver, CANADA
SP Amer Soc Mech Engineers
AB The complex geometries required for new and novel ceramic parts require new fabrication methods such as the fugitive phase approach. This paper examines the lamination step of fugitive phase approach ceramic fabrication process. The lamination step integrates the fugitive phase with the green ceramic material. The pressing used along with the geometric layout of the fugitive phase during the lamination step creates an uneven pressure distribution in the green ceramic. This pressure distribution causes density gradients and warping in the final ceramic part. A preliminary computational model of the lamination process is modeled and the resulting stress, strain energy, and deformed shape are examined.
C1 [Wimmer, Stephanie A.; DeGiorgi, Virginia G.; Pan, Ming-Jen] USN, Res Lab, Washington, DC 20375 USA.
RP Wimmer, SA (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 4
TC 0
Z9 0
U1 0
U2 2
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4427-4
PY 2012
BP 185
EP 190
PG 6
WC Engineering, Manufacturing; Engineering, Mechanical
SC Engineering
GA BFK76
UT WOS:000320286400023
ER
PT B
AU Woolf, RS
Phlips, BF
Hutcheson, AL
Mitchell, LJ
Wulf, EA
AF Woolf, Richard S.
Phlips, Bernard F.
Hutcheson, Anthony L.
Mitchell, Lee J.
Wulf, Eric A.
GP IEEE
TI An Active Interrogation Detection System (ACTINIDES) Based on a Dual
Fast Neutron/Gamma-Ray Coded Aperture Imager
SO 2012 IEEE INTERNATIONAL CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY
LA English
DT Proceedings Paper
CT 12th IEEE International Conference on Technologies for Homeland Security
(HST)
CY NOV 13-15, 2012
CL Waltham, MA
SP IEEE, IEEE Biometr Council, IEEE Boston Sect, IEEE USA, Massport, L3 Commun, Global Secur Finance, Homeland Secur Jobs, Market Res Media
DE Neutron Imaging; Gamma-Ray Imaging; Coded Aperture; Active Interrogation
ID UNIFORMLY REDUNDANT ARRAYS
AB We report on the initial characterization efforts for an active interrogation detection system (ACTINIDES) for applications in maritime security. The ACTINIDES concept is based on neutron/gamma-ray detection, measurement and imaging using a coded aperture mask and an array of liquid scintillator detectors. The coded mask is based on a modified uniformly redundant array (MURA) with hybrid mask elements comprised of high-density polyethylene and lead. The detector array is composed of thirty liquid scintillators. Liquid scintillator detectors are sensitive to both neutrons and gamma rays, with discrimination between the two accomplished by measurement of differences in the de-excitation light pulses. The proof-of-concept study of the instrument has been conducted passively in the laboratory; ultimately, the fully scaled-up instrument is designed to be used in tandem with an active interrogator. Results from the full laboratory test campaign will be presented, along with future prospects for work with an active interrogator.
C1 [Woolf, Richard S.] CNR, 500 5th St NW, Washington, DC 20001 USA.
[Phlips, Bernard F.; Hutcheson, Anthony L.; Mitchell, Lee J.; Wulf, Eric A.] US Naval Res Lab, High Energy Space Environm Branch, Div Space Sci, Washington, DC 20375 USA.
RP Woolf, RS (reprint author), CNR, 500 5th St NW, Washington, DC 20001 USA.
OI Woolf, Richard/0000-0003-4859-1711
FU Office of Naval Research
FX This work was supported by the Office of Naval Research.
NR 11
TC 2
Z9 2
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-2709-1; 978-1-4673-2708-4
PY 2012
BP 30
EP 35
PG 6
WC Computer Science, Theory & Methods
SC Computer Science
GA BEZ20
UT WOS:000318851500006
ER
PT B
AU Gabriel, JG
Singh, G
Steckler, B
AF Gabriel, James Gregory
Singh, Gurminder
Steckler, Brian
GP IEEE
TI An Evaluation Methodology for Rapidly Deployable Information and
Communications Technologies in HA/DR
SO 2012 IEEE INTERNATIONAL CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY
LA English
DT Proceedings Paper
CT 12th IEEE International Conference on Technologies for Homeland Security
(HST)
CY NOV 13-15, 2012
CL Waltham, MA
SP IEEE, IEEE Biometr Council, IEEE Boston Sect, IEEE USA, Massport, L3 Commun, Global Secur Finance, Homeland Secur Jobs, Market Res Media
DE HA/DR; information and communications technology; ICT; evaluation
methodology; disaster response
AB One of the most significant technological challenges after major humanitarian disasters is the rapid deployment of information and communications technologies (ICT) for initial responders. Reliance on ICT-particularly wireless communications-is essential to a coordinated response. This is especially true in international disasters due to the large number and diversity of responding organizations. Therefore, choosing the most effective ICT systems for disaster response is a critical factor for ensuring success of the response effort. This paper proposes a method to select and rapidly deploy ICT resources for disaster responders by evaluating ICT challenges that are unique to the post-disaster environment and identifying essential characteristics of rapidly deployable ICT systems. Further, the authors will develop a quantifiable methodology based on essential characteristics to evaluate and compare commercially-available ICT systems in order to identify technologies best suited for the disaster environment. Revelations will contribute to potential policy recommendations and follow-on research that will facilitate determination of the best ICT options, resulting in more effective cooperative utilization of these technologies to improve post-disaster responsiveness.
C1 [Gabriel, James Gregory; Steckler, Brian] USN, Dept Informat Sci, Postgrad Sch, Monterey, CA 93943 USA.
[Singh, Gurminder] USN, Dept Comp Sci, Postgrad Sch, Monterey, CA 93943 USA.
RP Gabriel, JG (reprint author), USN, Dept Informat Sci, Postgrad Sch, Monterey, CA 93943 USA.
EM james.gabriel@navy.mil; gsingh@nps.edu; steckler@nps.edu
NR 15
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-2709-1; 978-1-4673-2708-4
PY 2012
BP 232
EP 237
PG 6
WC Computer Science, Theory & Methods
SC Computer Science
GA BEZ20
UT WOS:000318851500038
ER
PT B
AU Auslander, B
Gupta, KM
Aha, DW
AF Auslander, Bryan
Gupta, Kalyan Moy
Aha, David W.
GP IEEE
TI Maritime Threat Detection using Plan Recognition
SO 2012 IEEE INTERNATIONAL CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY
LA English
DT Proceedings Paper
CT 12th IEEE International Conference on Technologies for Homeland Security
(HST)
CY NOV 13-15, 2012
CL Waltham, MA
SP IEEE, IEEE Biometr Council, IEEE Boston Sect, IEEE USA, Massport, L3 Commun, Global Secur Finance, Homeland Secur Jobs, Market Res Media
ID SYSTEM
AB Existing algorithms for maritime threat detection employ a variety of normalcy models that are probabilistic and/or rule-based. Unfortunately, they can be limited in their ability to model the subtlety and complexity of multiple vessel types and their spatio-temporal events, yet their representation is needed to accurately detect anomalies in maritime scenarios. To address these limitations, we apply plan recognition algorithms for maritime anomaly detection. In particular, we examine hierarchical task network (HTN) and case-based algorithms for plan recognition, which detect anomalies by generating expected behaviors for use as a basis for threat detection. We compare their performance with a behavior recognition algorithm on simulated riverine maritime traffic. On a set of simulated maritime scenarios, these plan recognition algorithms outperformed the behavior recognition algorithm, except for one reactive behavior task in which the inverse occurred. Furthermore, our case-based plan recognizer outperformed our HTN algorithm. On the short-term reactive planning scenarios, the plan recognition algorithms outperformed the behavior recognition algorithm on routine plan following. However, they are significantly outperformed on the anomalous scenarios.
C1 [Auslander, Bryan; Gupta, Kalyan Moy] Knexus Res Corp, 163 Waterfront St, Natl Harbor, MD 20745 USA.
[Aha, David W.] Navy Ctr Appl Res Artificial Intelligence, Naval Res Lab, Washington, DC 20375 USA.
RP Auslander, B (reprint author), Knexus Res Corp, 163 Waterfront St, Natl Harbor, MD 20745 USA.
EM bryan.auslander@knexusresearch.com; kalyan.gupta@knexusresearch.com;
david.aha@nrl.navy.mil
FU Office of Naval Research
FX We thank the Office of Naval Research for funding this research.
NR 21
TC 2
Z9 2
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-2709-1; 978-1-4673-2708-4
PY 2012
BP 249
EP 254
PG 6
WC Computer Science, Theory & Methods
SC Computer Science
GA BEZ20
UT WOS:000318851500041
ER
PT J
AU Estabridis, K
AF Estabridis, Katia
GP IEEE
TI Face Recognition and Learning via Adaptive Dictionaries
SO 2012 IEEE INTERNATIONAL CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY
LA English
DT Proceedings Paper
CT 12th IEEE International Conference on Technologies for Homeland Security
(HST)
CY NOV 13-15, 2012
CL Waltham, MA
SP IEEE, IEEE Biometr Council (BIO), IEEE Boston Sect, IEEE USA, Massport, L3 Commun, Global Secur Finance, Homeland Secur Jobs, Market Res Media
DE single sample per person; face recognition; unsupervised learning; l(1)
minimization
AB This paper proposes an adaptive face recognition algorithm to jointly classify and learn from unlabeled data. It presents an efficient design that specifically addresses the case when only a single sample per person is available for training. A dictionary composed of regional descriptors serves as the basis for the recognition system while providing a flexible framework to augment or update dictionary atoms. The algorithm is based on l(1) minimization techniques and the decision to update the dictionary is made in an unsupervised mode via non-parametric Bayes. The dictionary learning is done via reverse-OMP to select atoms that are orthogonal or near orthogonal to the current dictionary elements. The proposed algorithm was tested with two face databases showing the capability to handle illumination, scale, and some moderate pose and expression variations. Classification results as high as 96% were obtained with the Georgia Tech database and 94% correct classification rates for the Multi-PIE database for the frontal-view scenarios.
C1 USN, Res & Intelligence Dept, Air Weap Ctr, China Lake, CA 93555 USA.
RP Estabridis, K (reprint author), USN, Res & Intelligence Dept, Air Weap Ctr, China Lake, CA 93555 USA.
EM katia.estabridis@navy.mil
NR 26
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-2709-1
PY 2012
BP 280
EP 285
PG 6
WC Computer Science, Theory & Methods
SC Computer Science
GA BEZ20
UT WOS:000318851500046
ER
PT B
AU Shtessel, Y
Edwards, C
Menon, P
Cosby, A
Bordetsky, A
AF Shtessel, Yuri
Edwards, Christopher
Menon, Prathyush
Cosby, Alan
Bordetsky, Alex
GP IEEE
TI Predictive modeling and retaining connectivity for mobile wireless
communication network
SO 2012 IEEE INTERNATIONAL CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY
LA English
DT Proceedings Paper
CT 12th IEEE International Conference on Technologies for Homeland Security
(HST)
CY NOV 13-15, 2012
CL Waltham, MA
SP IEEE, IEEE Biometr Council, IEEE Boston Sect, IEEE USA, Massport, L3 Commun, Global Secur Finance, Homeland Secur Jobs, Market Res Media
ID CONSENSUS; SYSTEMS
AB The problem of maintaining connectivity in a mobile communication network is considered. The agents consist of two classes: one class of agents, which is termed primary mission agents, performs surveillance operations that may or may not be coordinated efforts. The second class of agents, which is termed relay agents, is controlled to maintain the connectivity. Two control algorithms are proposed to retain the connectivity of the network. Sliding mode observers are employed to predict the trajectories of the primary mission agents, when only their positions are known from blue force messages, and this information is used to construct state dependent graphs encapsulating the measure of connectivity. An optimal model predictive control is employed to develop the control policies for the relay agents to maximize connectivity. Also, the hybrid system approach is used to retain the connectivity of the communication network. The efficacy of the proposed control algorithms is confirmed on a case study of Riverine detection and interdiction operation.
C1 [Shtessel, Yuri; Cosby, Alan] Univ Alabama, Dept Elect & Comp Engn, Huntsville, AL 35899 USA.
[Edwards, Christopher] Univ Leicester, Dept Engn, Leicester LE1 7RH, Leics, England.
[Menon, Prathyush] Univ Exeter, Ctr Syst Dynam & Control, Exeter EX4 4QF, Devon, England.
[Bordetsky, Alex] Naval Postgraduate Sch, Dept Informat Technol, Monterey, CA USA.
RP Shtessel, Y (reprint author), Univ Alabama, Dept Elect & Comp Engn, Huntsville, AL 35899 USA.
EM shtessel@ece.uah.edu; chris.edwards@le.ac.uk;
P.M.Prathyush@exeter.ac.uk; jac0014@uah.edu; abordets@nps.edu
NR 20
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-2709-1; 978-1-4673-2708-4
PY 2012
BP 568
EP 573
PG 6
WC Computer Science, Theory & Methods
SC Computer Science
GA BEZ20
UT WOS:000318851500095
ER
PT B
AU Millett, M
Whitlock, R
Geelhood, B
AF Millett, Marshall
Whitlock, Robert
Geelhood, Bruce
GP IEEE
TI Improving Gamma Radiation Detection through Exploitation of Temporal
Data
SO 2012 IEEE INTERNATIONAL CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY
LA English
DT Proceedings Paper
CT 12th IEEE International Conference on Technologies for Homeland Security
(HST)
CY NOV 13-15, 2012
CL Waltham, MA
SP IEEE, IEEE Biometr Council, IEEE Boston Sect, IEEE USA, Massport, L3 Commun, Global Secur Finance, Homeland Secur Jobs, Market Res Media
DE temporal domain; integration period; dynamic source encounter;
signal-to-noise ratio
AB Though some encounters with potentially illicit radiological or nuclear material involve a stationary or dwell survey, many of the conceivable encounters are dynamic in nature. In the general unshielded or homogeneously shielded dynamic encounter, the mean detectable source signature strength will follow a well behaved curve with time: increasing on approach, peaking at the point-of-closest-approach, and then decreasing. Despite this well understood phenomenon, many currently available detection systems are set up to optimally detect an arbitrary step function that may or may not be representative of the anticipated dynamics of the encounter. Of course, the fact that radiation emission generally follows a Poisson process requires a signal integration time. For example, the dynamic scanning mode of many detection systems considers discrete and independent one second response data. Such a system is only optimized for a one second dwell. This approach can be improved upon. It will be shown that if the dynamics (meaning range and relative velocity) are understood, the integration period can be optimized to yield maximum signal to noise ratio. An analytical expression describing gamma radiation signature strength will be provided that may be used as the basis for studies of the effectiveness of temporally aware approaches to source detection in a dynamic encounter.
C1 [Millett, Marshall] USN Acad, Annapolis, MD 21402 USA.
[Geelhood, Bruce] NCAE, Beacon, NY USA.
RP Millett, M (reprint author), USN Acad, Annapolis, MD 21402 USA.
EM milleight@gmail.com; RRWhitlock6005@gmail.com;
Bruce.Geelhood@NCAEinc.com
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-2709-1; 978-1-4673-2708-4
PY 2012
BP 643
EP 647
PG 5
WC Computer Science, Theory & Methods
SC Computer Science
GA BEZ20
UT WOS:000318851500108
ER
PT B
AU Merrill, MH
AF Merrill, Marriner H.
GP ASME
TI LARGE-SCALE ELECTROSPRAY IONIZATION METHODS FOR NANOCOATING APPLICATION
SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS
AND EXPOSITION 2010, VOL 12
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
(IMECE)
CY NOV 12-18, 2010
CL Vancouver, CANADA
SP Amer Soc Mech Engineers
ID THIN-FILMS; DEPOSITION; EVAPORATION; NANOPARTICLES; NANOELECTROSPRAY;
EMISSION; SURFACES; FISSION; CHARGE; MODEL
AB A scalable nano-coating process is needed that can be applied at atmospheric temperatures and pressures with low waste. This would enable the efficient production of advanced thin-film materials from solar cells to super-hydrophobic surfaces. Unfortunately, current methods for producing nanoparticle or nano-structured macromolecular coatings often require substrate immersion, specific atmospheres, and/or long growth times. One potential technique to overcome these challenges would be to use electrospray ionization (ESI) to first disperse large numbers of nanoparticles or polymers in air at standard conditions, and then deposit these on a substrate. ESI is a relatively mature technology, and although it has been developed largely for processing microliter volumes in mass spectrometry, it is believed that the fundamental science can be scaled up. This work presents a model for an ESI deposition method. It combines scaling laws for charged jets with spray and fission models to capture relevant charge, spray, fission, and evaporation phenomena. The developed model is shown to be very simple and efficient while still matching published experimental results. Using the model, current ESI techniques are compared such as NanoESI and Flow-Focusing ESI. A significant technological challenge to ESI deposition is discovered to be the trapping of the majority of the solute in a few primary droplets. Different solutions to this challenge are examined and used to define the direction for future work.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Merrill, MH (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 43
TC 0
Z9 0
U1 1
U2 7
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4449-6
PY 2012
BP 177
EP 186
PG 10
WC Engineering, Mechanical
SC Engineering
GA BFJ72
UT WOS:000320140600026
ER
PT S
AU Hernandez, AS
Lucas, TW
Sanchez, PJ
AF Hernandez, Alejandro S.
Lucas, Thomas W.
Sanchez, Paul J.
BE Laroque, C
Himmelspach, J
Pasupathy, R
TI SELECTING RANDOM LATIN HYPERCUBE DIMENSIONS AND DESIGNS THROUGH
ESTIMATION OF MAXIMUM ABSOLUTE PAIRWISE CORRELATION
SO 2012 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)
CY DEC 09-12, 2012
CL Berlin, GERMANY
ID CONSTRUCTION METHOD; INPUT VARIABLES
AB Latin hypercubes are the most widely used class of design for high-dimensional computer experiments. However, the high correlations that can occur in developing these designs can complicate subsequent analyses. Efforts to reduce or eliminate correlations can be complex and computationally expensive. Consequently, researchers often use uncorrected Latin hypercube designs in their experiments and accept any resulting multicollinearity issues. In this paper, we establish guidelines for selecting the number of runs and/or the number of variables for random Latin hypercube designs that are likely to yield an acceptable degree of correlation. Applying our policies and tools, analysts can generate satisfactory random Latin hypercube designs without the need for complex algorithms.
C1 [Hernandez, Alejandro S.; Lucas, Thomas W.; Sanchez, Paul J.] USN, Postgrad Sch, Monterey, CA 93940 USA.
RP Hernandez, AS (reprint author), USN, Postgrad Sch, 1 Univ Circle, Monterey, CA 93940 USA.
EM ahernand@nps.edu; twlucas@nps.edu; pjsanche@nps.edu
NR 24
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4673-4779-2
J9 WINT SIMUL C PROC
PY 2012
PG 12
WC Computer Science, Theory & Methods
SC Computer Science
GA BFD03
UT WOS:000319225501078
ER
PT S
AU Hyland, JC
Smith, CM
AF Hyland, John C.
Smith, Cheryl M.
BE Laroque, C
Himmelspach, J
Pasupathy, R
TI EFFECTS OF STOCHASTIC TRAFFIC FLOW MODEL ON EXPECTED SYSTEM PERFORMANCE
SO 2012 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)
CY DEC 09-12, 2012
CL Berlin, GERMANY
AB In 2010 Naval Surface Warfare Center - Panama City Division (NSWC-PCD) developed a System Performance and Layered Analysis Tool (SPLAT) that evaluates candidate threat detection systems. Given a sensor deployment pattern, SPLAT combines sensor performances, scenario data, and pedestrian flow to analytically compute expected probability of detection (pd) and false alarm (pfa). Because the 2010 pedestrian flow model describes all possible trips through the detection area as straight-line paths, SPLAT can enumerate all possible trips and explicitly determine the maximum pd along each trip. NSWC-PCD's new 2011 flow model now accommodates stochastic pedestrian motion defined as a Markov process. However, stochastic flow modeling has created a combinatorial explosion; there are now too many paths to explicitly enumerate. Addressing this problem, NSWC-PCD has developed a unique expected maximum probability technique which approximates results obtained by enumerating all possible paths while still preserving spatial correlations created by sensor deployment patterns.
C1 [Hyland, John C.; Smith, Cheryl M.] USN, Surface Warfare Ctr, Panama City Div, Panama City, FL 32407 USA.
RP Hyland, JC (reprint author), USN, Surface Warfare Ctr, Panama City Div, 110 Vernon Ave, Panama City, FL 32407 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4673-4779-2
J9 WINT SIMUL C PROC
PY 2012
PG 11
WC Computer Science, Theory & Methods
SC Computer Science
GA BFD03
UT WOS:000319225502043
ER
PT S
AU Powers, MJ
Sanchez, SM
Lucas, TW
AF Powers, Matthew J.
Sanchez, Susan M.
Lucas, Thomas W.
BE Laroque, C
Himmelspach, J
Pasupathy, R
TI THE EXPONENTIAL EXPANSION OF SIMULATION IN RESEARCH
SO 2012 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)
CY DEC 09-12, 2012
CL Berlin, GERMANY
ID OPTIMIZATION; EFFICIENT
AB Simulation has overcome critical obstacles to become a valuable method for obtaining insights about the behavior of complex systems. George Box's famous assessment that "all models are wrong, some are useful" referred to statistical models, but should now be reimagined to reflect that many simulation models are "right enough" to aid in decision making for important practical problems. Over the past fifty years, simulation has transformed from its beginnings as a brute-force numerical integration method into an attractive and sophisticated option for decision makers. This is due, in part, to the exponential growth of computing power. Although other analytic approaches also benefit from this trend, keyword searches of several scholarly search engines reveal that the reliance on simulation is increasing more rapidly. A descriptive analysis paints a compelling picture: simulation is frequently a researcher's preferred method for supporting decision makers and may often be the "first resort" for complex real world issues.
C1 [Powers, Matthew J.; Sanchez, Susan M.; Lucas, Thomas W.] USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
RP Powers, MJ (reprint author), USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
EM mjpowers@nps.edu; ssanchez@nps.edu; twlucas@nps.edu
NR 25
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4673-4779-2
J9 WINT SIMUL C PROC
PY 2012
PG 12
WC Computer Science, Theory & Methods
SC Computer Science
GA BFD03
UT WOS:000319225502006
ER
PT S
AU Sanchez, SM
Wan, H
AF Sanchez, Susan M.
Wan, Hong
BE Laroque, C
Himmelspach, J
Pasupathy, R
TI WORK SMARTER, NOT HARDER: A TUTORIAL ON DESIGNING AND CONDUCTING
SIMULATION EXPERIMENTS
SO 2012 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)
CY DEC 09-12, 2012
CL Berlin, GERMANY
AB Simulation models are integral to modern scientific research, national defense, industry and manufacturing, and in public policy debates. These models tend to be extremely complex, often with thousands of factors and many sources of uncertainty. To understand the impact of these factors and their interactions on model outcomes requires efficient, high-dimensional design of experiments. Unfortunately, all to often, many large-scale simulation models continue to be explored in ad hoc ways. This suggests that more simulation researchers and practitioners need to be aware of the power of experimental design in order to get the most from their simulation studies. In this tutorial, we demonstrate the basic concepts important for design and conducting simulation experiments, and provide references to other resources for those wishing to learn more. This tutorial (an update of previous WSC tutorials) will prepare you to make your next simulation study a simulation experiment.
C1 [Sanchez, Susan M.] USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
RP Sanchez, SM (reprint author), USN, Postgrad Sch, Dept Operat Res, Monterey, CA 93943 USA.
EM ssanchez@nps.edu; hwan@purdue.edu
NR 35
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4673-4779-2
J9 WINT SIMUL C PROC
PY 2012
PG 15
WC Computer Science, Theory & Methods
SC Computer Science
GA BFD03
UT WOS:000319225504001
ER
PT S
AU Tolk, A
Adam, NR
Cayirci, E
Pickl, S
Shumaker, R
Sullivan, JA
Waite, WF
AF Tolk, Andreas
Adam, Nabil R.
Cayirci, Erdal
Pickl, Stefan
Shumaker, Randall
Sullivan, Joseph A.
Waite, William F.
BE Laroque, C
Himmelspach, J
Pasupathy, R
TI DEFENSE AND SECURITY APPLICATIONS OF MODELING AND SIMULATION - GRAND
CHALLENGES AND CURRENT EFFORTS
SO 2012 WINTER SIMULATION CONFERENCE (WSC)
SE Winter Simulation Conference Proceedings
LA English
DT Proceedings Paper
CT Winter Simulation Conference (WSC)
CY DEC 09-12, 2012
CL Berlin, GERMANY
AB This paper presents the positions of seven international experts regarding current and future grand challenges for modeling and simulation (M&S) supporting the defense and security domain. Topics addressed include new interoperability issues, real-time analysis challenges, evolving military and training exercises, the future role and importance of Operations Research and M&S, modeling human teams and cultural behavior challenges, how to support successful co-evolving of research and academic programs, and the implications of enterprise postures and operational concepts of future M&S. In summary, all contributions focus on a particular facet that in summary help to understand the conceptual, technical, and organizational challenges we are currently facing.
C1 [Tolk, Andreas] Old Dominion Univ, Engn Management & Syst Engn, Norfolk, VA 23529 USA.
[Adam, Nabil R.] US Dept Homeland Secur Sci & Technol, IDD, Washington, DC USA.
[Cayirci, Erdal] Univ Stavanger, Elect & Comp Engn, Stavanger, Norway.
[Pickl, Stefan] Univ Fed Armed Forces, Core Competence Ctr OR, Munich, Germany.
[Shumaker, Randall] Inst Simulat & Training, Orlando, FL USA.
[Sullivan, Joseph A.] MOVES Inst, Naval Postgrad Sch, Monterey, CA USA.
[Waite, William F.] AEgis Technol Grp, Huntsville, AL USA.
RP Tolk, A (reprint author), Old Dominion Univ, Engn Management & Syst Engn, Norfolk, VA 23529 USA.
EM atolk@odu.edu; nabil.adam@hq.dhs.gov; erdal.cayirci@uis.no;
stef-an.pickl@unibw.de; shumaker@ist.ucf.edu; sullivan@nps.edu;
bwaite@aegistg.com
FU Japan Society for the Promotion of Science ( JSPS) [23593129]
FX The authors wish to express sincere gratitude to the staff of the Kohnan
Hospital Group. This research was supported by " Grant- in- Aid for
Scientific Research ( C) ( 23593129)" of Japan Society for the Promotion
of Science ( JSPS).
NR 29
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0891-7736
BN 978-1-4673-4779-2; 978-1-4673-4780-8
J9 WINT SIMUL C PROC
PY 2012
PG 15
WC Computer Science, Theory & Methods
SC Computer Science
GA BFD03
UT WOS:000319225503043
ER
PT J
AU Cornis-Pop, M
Mashima, PA
Roth, CR
MacLennan, DL
Picon, LM
Hammond, CS
Goo-Yoshino, S
Isaki, E
Singson, M
Frank, EM
AF Cornis-Pop, Micaela
Mashima, Pauline A.
Roth, Carole R.
MacLennan, Donald L.
Picon, Linda M.
Hammond, Carol Smith
Goo-Yoshino, Shari
Isaki, Emi
Singson, Maile
Frank, Elaine M.
TI Cognitive-communication rehabilitation for combat-related mild traumatic
brain injury
SO JOURNAL OF REHABILITATION RESEARCH AND DEVELOPMENT
LA English
DT Editorial Material
ID OF-THE-LITERATURE; POSTTRAUMATIC-STRESS-DISORDER; THERAPEUTIC WORKING
ALLIANCE; RANDOMIZED CONTROLLED-TRIAL; HEAD-INJURY; ADULT ONSET; MEMORY;
IRAQ; INTERVENTION; AFGHANISTAN
C1 [Cornis-Pop, Micaela] Hunter Holmes McGuire VA Med Ctr, Richmond, VA USA.
[Mashima, Pauline A.; Goo-Yoshino, Shari] Tripler Army Med Ctr, Honolulu, HI 96859 USA.
[Roth, Carole R.] USN, Med Ctr, San Diego, CA 92152 USA.
[MacLennan, Donald L.] Minnevolis VA Hlth Care Syst, Minneapolis, MN USA.
[Picon, Linda M.] James A Haley Vet Hosp, Tampa, FL 33612 USA.
[Picon, Linda M.] Univ S Florida, Dept Commun Sci & Disorders, Coll Behav & Community Sci, Tampa, FL USA.
[Hammond, Carol Smith] Durham VA Med Ctr, Durham, NC USA.
[Hammond, Carol Smith] Duke Univ, Div Gen Internal Med, Sch Med, Durham, NC USA.
[Isaki, Emi] No Arizona Univ, Flagstaff, AZ 86011 USA.
[Singson, Maile] VA Pacific Islands Hlth Care Syst, Honolulu, HI USA.
[Frank, Elaine M.] Univ S Carolina, Dept Commun Sci & Disorders, Arnold Sch Publ Hlth, Columbia, SC 29208 USA.
RP Cornis-Pop, M (reprint author), Hunter Holmes McGuire VA Med Ctr, Richmond, VA USA.
EM pauline.mashima@us.army.mil
NR 112
TC 2
Z9 3
U1 4
U2 10
PU JOURNAL REHAB RES & DEV
PI BALTIMORE
PA DEPT OF VETERANS AFFAIRS REHABIL RES & DEVELOP CTR 103 SOUTH GAY STREET,
BALTIMORE, MD 21202-4051 USA
SN 0748-7711
J9 J REHABIL RES DEV
JI J. Rehabil. Res. Dev.
PY 2012
VL 49
IS 7
BP XI
EP XXXI
DI 10.1682/JRRD.2012.03.0048
PG 21
WC Rehabilitation
SC Rehabilitation
GA 149EZ
UT WOS:000319303100002
PM 23341288
ER
PT S
AU Bloom, MA
White, RW
Porter, MA
Derickson, DJ
Weatherford, TR
AF Bloom, M. A.
White, R. W.
Porter, M. A.
Derickson, D. J.
Weatherford, T. R.
GP IEEE
TI Small-Signal and DC Characterization of Stressed GaN-on-Si HEMTs
SO 2012 IEEE INTERNATIONAL INTEGRATED RELIABILITY WORKSHOP FINAL REPORT
SE IEEE International Integrated Reliability Workshop Final Report
LA English
DT Proceedings Paper
CT IEEE International Integrated Reliability Workshop (IIRW)
CY OCT 14-18, 2012
CL S Lake Tahoe, CA
SP IEEE, IEEE Electron Devices Soc (EDS), IEEE Reliabil Soc
DE GaN-on-Si; high-electron mobility transistor; HEMT; degradation;
critical voltage; electron trapping; electron detrapping; small-signal
model; thermal stress
AB Shifts in GaN-on-Si HEMT device characteristics due to the combined effects of high electrical field stress, thermal stress, and electron trapping are reported. A stressing experiment is carried out to analyze the effects of high symmetrical electric field distributions upon device degradation for four groups of commercial GaN-on-Si devices. Characterization of degradation involved analyzing I-V characteristics, transfer characteristics, and S-parameters before and after stressing. Results from these experiments show an expected increase in gate leakage, but also return an increase in saturation drain current, a negative shift in threshold voltage, and a decrease in reverse transmission gain and associated small signal gate-to-drain capacitance after stressing under a symmetrical electric field distribution.
C1 [Bloom, M. A.; White, R. W.; Derickson, D. J.] Calif Polytech State Univ San Luis Obispo, Dept Elect Engn, San Luis Obispo, CA 93407 USA.
[Porter, M. A.; Weatherford, T. R.] Naval Postgraduate Sch, Elect & Comp Engn Dept, Monterey, CA USA.
RP Bloom, MA (reprint author), Calif Polytech State Univ San Luis Obispo, Dept Elect Engn, San Luis Obispo, CA 93407 USA.
NR 7
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1930-8841
BN 978-1-4673-2752-7; 978-1-4673-2749-7
J9 INT INTEG REL WRKSP
PY 2012
BP 187
EP 190
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BFE19
UT WOS:000319340400052
ER
PT S
AU Geoghegan, KB
Siddiqui, JJ
Weatherford, TR
AF Geoghegan, K. B.
Siddiqui, J. J.
Weatherford, T. R.
GP IEEE
TI y PMOS NBTI analysis of a 45nm CMOS-SOI Process with Nitrided Gate
Dielectric
SO 2012 IEEE INTERNATIONAL INTEGRATED RELIABILITY WORKSHOP FINAL REPORT
SE IEEE International Integrated Reliability Workshop Final Report
LA English
DT Proceedings Paper
CT IEEE International Integrated Reliability Workshop (IIRW)
CY OCT 14-18, 2012
CL S Lake Tahoe, CA
SP IEEE, IEEE Electron Devices Soc (EDS), IEEE Reliabil Soc
AB As a consequence of the semiconductor industry chasing Moore's Law, device scaling and changes to the transistor's material system has introduced significant emerging reliability concerns which have the potential for drastically shortening device and hence product lifetimes. Given that semiconductor technologies leveraged for analog and mixed-signal designs in military and aerospace systems tend to lag behind industry, the extent and potential ramifications of the impending reliability problem has yet to be fully appreciated by the respective communities. Radiation effects and extended operating conditions, commonplace in military and aerospace systems, exacerbate the situation. In this paper, the initial results and analysis of the reliability concern of Negative Bias Temperature Instability (NBTI) in p-channel Metal Oxide Semiconductors (PMOS) devices fabricated in a 45nm CMOS-SOI process will be presented. In addition, the prospect of ionizing space-radiation on PMOS NBTI device reliability will be introduced progressing to the topic of further proposed research, PMOS NBTI in an ionizing radiation environment.
C1 [Geoghegan, K. B.; Weatherford, T. R.] Naval Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA USA.
[Geoghegan, K. B.; Siddiqui, J. J.] Def MicroElect Activ, Monterey, CA USA.
RP Geoghegan, KB (reprint author), Naval Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA USA.
FU DMEA; DoD SMART
FX The authors would like recognize the contributions of A. J. Sandhu, T.
J. Shepherd, J. Lloyd, K Mangat, and D. Flowers at the Defense
Microelectronics Activity (DMEA) in support of this work and the
generous support of the DMEA and the DoD SMART program.
NR 6
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1930-8841
BN 978-1-4673-2752-7; 978-1-4673-2749-7
J9 INT INTEG REL WRKSP
PY 2012
BP 199
EP 202
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BFE19
UT WOS:000319340400055
ER
PT S
AU Lewis, TG
Darken, RP
Mackin, T
Dudenhoeffer, D
AF Lewis, Ted G.
Darken, Rudolph P.
Mackin, Thomas
Dudenhoeffer, Donald
BE Flammini, F
TI Model-based risk analysis for critical infrastructures
SO CRITICAL INFRASTRUCTURE SECURITY: ASSESSMENT, PREVENTION, DETECTION,
RESPONSE
SE WIT Transactions on State of the Art in Science and Engineering
LA English
DT Article; Book Chapter
DE Critical Infrastructure; Risk; Probabilistic Risk Assessment; Network
Science; Optimal Risk Reduction; System Risk; Risk Minimization;
Attacker-Defender Model; Stackelberg Game
ID COMPLEX NETWORKS
AB This chapter describes a risk-informed decision-making process for analysing and protecting large-scale critical infrastructure and key resource (CI/KR) systems, and a Model-Based Risk Analysis (MBRA) tool for modelling risk, quantifying it and optimally allocating fixed resources to reduce system vulnerability. MBRA is one of the first tools to adopt a systems approach to risk-informed decision-making. It applies network science metrics, height, degree, betweeness and contagiousness to a network of interdependent infrastructure assets across multiple sectors. Resource allocation is applied across entire networks to reduce risk and to determine threat, vulnerability and consequence values using Stackelberg game theory. MBRA is compared with non-network assessment tools: CARVER, Maritime Security Risk Analysis Model (MSRAM) and Knowledge Display and Aggregation System (KDAS) - three leading infrastructure analysis tools currently in use by practitioners. MBRA has been used successfully to model a variety of sectors, ranging from water, power, energy and telecommunications to transportation.
C1 [Lewis, Ted G.; Darken, Rudolph P.] USN, Postgrad Sch, Ctr Homeland Def & Secur, Monterey, CA 93943 USA.
[Mackin, Thomas] CalPoly Univ, Dept Mech Engn, San Luis Obispo, CA 93402 USA.
[Dudenhoeffer, Donald] Prior 5 Holdings Inc, Boston, MA 02109 USA.
RP Lewis, TG (reprint author), USN, Postgrad Sch, Ctr Homeland Def & Secur, Monterey, CA 93943 USA.
NR 16
TC 2
Z9 2
U1 1
U2 4
PU WIT PRESS
PI SOUTHAMPTON
PA ASHURST LODGE, SOUTHAMPTON SO40 7AA, ASHURST, ENGLAND
SN 1755-8336
BN 978-1-84564-562-5
J9 WIT T STATE ART SCI
PY 2012
VL 54
BP 3
EP 19
PG 17
WC Computer Science, Information Systems
SC Computer Science
GA BEZ50
UT WOS:000318898700002
ER
PT S
AU Rowe, NC
Reed, AA
Schwamm, R
Cho, J
Flores, JJ
Das, A
AF Rowe, Neil C.
Reed, Ahren A.
Schwamm, Riqui
Cho, Jeehee
Flores, Jose J.
Das, Arijit
BE Flammini, F
TI Networks of simple sensors for detecting emplacement of improvised
explosive devices
SO CRITICAL INFRASTRUCTURE SECURITY: ASSESSMENT, PREVENTION, DETECTION,
RESPONSE
SE WIT Transactions on State of the Art in Science and Engineering
LA English
DT Article; Book Chapter
DE Improvised Explosive Device; IED; Emplacement; Sensors; Networks;
Suspicion; Terrain; Probability; Anomaly
AB Detection of improvised explosive devices is difficult and requires a wide spectrum of strategies. Detection during emplacement is the best hope. Nonimaging sensors provide several advantages over cameras in expense, robustness, and processing simplicity for this task. We describe experiments with inexpensive commercial sensors and show how data can be combined to provide monitoring for suspicious pedestrian behavior at a 1-10 meter scale. Our approach preanalyzes terrain to rate likelihood of emplacement. We install sensors and monitor the terrain, seeking direct clues to suspicious behavior such as loitering and odd sounds such as excavation. We also use sensor data to track people by inferring their probability distributions and use this to detect significant accelerations and atypical velocity vectors, both of which can indicate suspicious behavior. We describe experiments we have conducted with a prototype sensor network of eight kinds of sensors, from which it appears that motion and sonar sensors are the most helpful for this task.
C1 [Rowe, Neil C.; Reed, Ahren A.; Schwamm, Riqui; Cho, Jeehee; Flores, Jose J.; Das, Arijit] USN, Postgrad Sch, Monterey, CA 93943 USA.
RP Rowe, NC (reprint author), USN, Postgrad Sch, Monterey, CA 93943 USA.
NR 18
TC 0
Z9 0
U1 0
U2 1
PU WIT PRESS
PI SOUTHAMPTON
PA ASHURST LODGE, SOUTHAMPTON SO40 7AA, ASHURST, ENGLAND
SN 1755-8336
BN 978-1-84564-562-5
J9 WIT T STATE ART SCI
PY 2012
VL 54
BP 233
EP 246
PG 14
WC Computer Science, Information Systems
SC Computer Science
GA BEZ50
UT WOS:000318898700016
ER
PT S
AU Haverhals, LM
Foley, MP
Brown, EK
Fox, DM
De Long, HC
Trulove, PC
AF Haverhals, Luke M.
Foley, Matthew P.
Brown, E. Kate
Fox, Douglas M.
De Long, Hugh C.
Trulove, Paul C.
BE Visser, AE
Bridges, NJ
Rogers, RD
TI Natural Fiber Welding: Ionic Liquid Facilitated Biopolymer Mobilization
and Reorganization
SO IONIC LIQUIDS: SCIENCE AND APPLICATIONS
SE ACS Symposium Series
LA English
DT Proceedings Paper
CT Symposium on Ionic Liquids - Science and Applications / 243rd National
Spring Meeting of the American-Chemical-Society
CY MAR 25-29, 2012
CL San Diego, CA
SP Amer Chem Soc, Div Ind & Engn Chem, Amer Chem Soc
ID X-RAY-DIFFRACTION; SILICATE NANOCOMPOSITES; CELLULOSE COMPOSITES;
DISSOLUTION; SILK; POLYMER; FLAMMABILITY; SOLVENTS; C-13
AB In this report, we discuss "natural fiber welding" - an ionic liquid-based methodology that enables the generation of complex, functionalized composites from natural fibrous materials. A unique feature of fiber welding is the ability to selectively open and mobilize biopolymer structures while simultaneously preserving a portion of the biopolymer (micro and meso structures) in the native state. By precisely regulating process variables such as the purity, type, amount, and placement of ionic liquid solvent as well as the duration and temperature of treatment, controlled reorganization of natural material hydrogen bonding networks is achieved. The end result is often dramatic enhancement and modification of physical and chemical properties without disruption to many desirable properties intrinsic to natural materials.
C1 [Haverhals, Luke M.; Foley, Matthew P.; Brown, E. Kate; Trulove, Paul C.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
[Fox, Douglas M.] Amer Univ, Dept Chem, Washington, DC 20016 USA.
[De Long, Hugh C.] Air Force Off Sci Res, Directorate Math & Life Sci, Arlington, VA 22203 USA.
RP Haverhals, LM (reprint author), USN Acad, Dept Chem, Annapolis, MD 21402 USA.
EM trulove@usna.edu
FU US Air Force Office of Scientific Research; US Naval Academy
FX We are grateful to the US Air Force Office of Scientific Research and US
Naval Academy for funding portions of this work. Any opinions, findings,
conclusions, or recommendations expressed in this work are those of the
authors and do not necessarily reflect the views of the US Air Force or
the US Navy.
NR 45
TC 2
Z9 2
U1 0
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA
SN 0097-6156
BN 978-0-8412-2763-7
J9 ACS SYM SER
JI ACS Symp. Ser.
PY 2012
VL 1117
BP 145
EP +
PG 4
WC Chemistry, Applied; Engineering, Chemical
SC Chemistry; Engineering
GA BFA68
UT WOS:000319021900006
ER
PT J
AU Macera, CA
Aralis, HJ
MacGregor, AJ
Rauh, MJ
Galarneau, MR
AF Macera, Caroline A.
Aralis, Hilary J.
MacGregor, Andrew J.
Rauh, Mitchell J.
Galarneau, Michael R.
TI Postdeployment symptom changes and traumatic brain injury and/or
posttraumatic stress disorder in men
SO JOURNAL OF REHABILITATION RESEARCH AND DEVELOPMENT
LA English
DT Article
DE blasts; deployment; males; military; odds ratio; percent change;
Post-Deployment Health Assessment; posttraumatic stress disorder;
symptoms; traumatic brain injury
ID HEALTH PROBLEMS; IRAQ; MILITARY; AFGHANISTAN; DEPLOYMENT; VETERANS;
CARE; CHALLENGES; OUTCOMES; PROGRAM
AB In Operation Iraqi Freedom and Operation Enduring Freedom, blast-related injuries associated with combat are frequent and can result in traumatic brain injury (TBI) symptoms that may be difficult to distinguish from psychological problems. Using data from the Post-Deployment Health Assessment and Reassessment, we identified 12,046 male U.S. Navy sailors and Marines with reported combat exposure from 2008 to 2009. Symptoms potentially associated with blast-related TBI and posttraumatic stress disorder (PTSD) that were reported immediately after deployment were compared with symptoms present several months later. Our study supports others that have found that subjects with blast-related injuries may experience the development or worsening of symptoms during the months following deployment. Additionally, our study found that those who screened positive for PTSD and TBI formed a unique group, with the presence of TBI exacerbating development of PTSD symptoms at reassessment. Providers should recognize the late development of symptoms, consider the possibility of comorbidity, and be prepared to treat multiple symptoms rather than a specific diagnostic category.
C1 [Macera, Caroline A.; Aralis, Hilary J.; Rauh, Mitchell J.] USN, Hlth Res Ctr, Warfighter Performance Dept, San Diego, CA 92106 USA.
[MacGregor, Andrew J.; Galarneau, Michael R.] USN, Hlth Res Ctr, Med Modeling Simulat & Mission Support Dept, San Diego, CA 92106 USA.
RP Aralis, HJ (reprint author), USN, Hlth Res Ctr, Warfighter Performance Dept, 140 Sylvester Rd, San Diego, CA 92106 USA.
EM Hilary.Aralis@gmail.com
RI Schueter, nicos/A-3625-2014
FU U.S. Navy Bureau of Medicine and Surgery [60818]
FX This material was based on work supported by the U.S. Navy Bureau of
Medicine and Surgery, under Work Unit No. 60818.
NR 33
TC 12
Z9 12
U1 2
U2 6
PU JOURNAL REHAB RES & DEV
PI BALTIMORE
PA DEPT OF VETERANS AFFAIRS REHABIL RES & DEVELOP CTR 103 SOUTH GAY STREET,
BALTIMORE, MD 21202-4051 USA
SN 0748-7711
J9 J REHABIL RES DEV
JI J. Rehabil. Res. Dev.
PY 2012
VL 49
IS 8
BP 1197
EP 1208
DI 10.1682/JRRD.2011.07.0131
PG 12
WC Rehabilitation
SC Rehabilitation
GA 149FA
UT WOS:000319303200007
PM 23341312
ER
PT S
AU Dolk, D
Granat, J
AF Dolk, Daniel
Granat, Janusz
BE Dolk, D
Granat, J
TI Modeling for Decision Support in Network-Based Services
SO MODELING FOR DECISION SUPPORT IN NETWORK-BASED SERVICES: THE APPLICATION
OF QUANTITATIVE MODELING TO SERVICE SCIENCE
SE Lecture Notes in Business Information Processing
LA English
DT Proceedings Paper
CT 12th Conference of the IFIP Working Group 7.6 on Advanced Analytics
CY AUG 29-31, 2012
CL Aachen, GERMANY
DE Network-based services; decision support; modeling; optimization;
knowledge science
AB In this introduction to the book, we discuss our current motivation for modeling and optimization applications involving network-based services. Our conceptual model of service science management and engineering (SSME) as the basis for better understanding network-based services embraces the confluence of network science, computational and analytical modeling, knowledge science and decision support. We segment the contributed articles into these four categories and provide a capsule summary of each paper.
C1 [Dolk, Daniel] USN, Postgrad Sch, Dept Informat Sci, Fac Elect, Monterey, CA 93943 USA.
[Granat, Janusz] Warsaw Univ Technol, Inst Control & Computat Engn, Warsaw, Poland.
[Granat, Janusz] Natl Inst Telecommun Warsaw, Warsaw, Poland.
RP Dolk, D (reprint author), USN, Postgrad Sch, Dept Informat Sci, Fac Elect, Monterey, CA 93943 USA.
EM drdolk@nps.edu; J.Granat@itl.waw.pl
RI Granat, Janusz/G-2812-2015
OI Granat, Janusz/0000-0003-3130-5555
NR 18
TC 1
Z9 1
U1 0
U2 4
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 1865-1348
BN 978-3-642-27611-8; 978-3-642-27612-5
J9 LECT NOTES BUS INF P
PY 2012
VL 42
BP 1
EP +
PG 3
WC Computer Science, Information Systems
SC Computer Science
GA BFD23
UT WOS:000319240600001
ER
PT S
AU Bui, T
Dolk, D
Gachet, A
Sebastian, HJ
AF Bui, Tung
Dolk, Daniel
Gachet, Alexandre
Sebastian, Hans-Juergen
BE Dolk, D
Granat, J
TI Virtual Environments for Computational and Analytical Modeling: A
Telemedicine Application
SO MODELING FOR DECISION SUPPORT IN NETWORK-BASED SERVICES: THE APPLICATION
OF QUANTITATIVE MODELING TO SERVICE SCIENCE
SE Lecture Notes in Business Information Processing
LA English
DT Proceedings Paper
CT 12th Conference of the IFIP Working Group 7.6 on Advanced Analytics
CY AUG 29-31, 2012
CL Aachen, GERMANY
DE Information Systems Modeling; simulation and decision support; service
system; SSME; virtual environments; telemedicine
ID SYSTEMS
AB Virtualization is commonly known in computer science as an abstraction technique of computer resources physical platforms and resources - so that applications or end-users can seamlessly interact with these resources without the needs to deal with physical requirements. Going beyond the simulation of computer environments and resources, this paper proposes a paradigm for designing complex information systems based upon the concept of virtual modeling. The idea is to allow modelers use a virtual environment that is composed of real modeling platforms to replicate complex real problems, and explore new and virtual problems that might have high potential for real life applications. Modeling here is not just an effort to find (new) solutions to an existing problem, rather it is also a discovery process seeking to create new (problems). We see this approach as vital in addressing the applications emerging from service science, management and engineering (SSME), which will rely upon computational modeling approaches as much, if not more, than traditional supply-chain based analytical modeling. We illustrate our design methodology with a telemedicine application using Brahms, a multi-agent programming language developed by the NASA.
C1 [Bui, Tung; Gachet, Alexandre] Univ Hawaii, Honolulu, HI 96822 USA.
[Dolk, Daniel] Naval Postgraduate Sch, Monterey, CA USA.
[Sebastian, Hans-Juergen] Rhein Westfal TH Aachen, Deutsch Post Chair Optimizat Distribut Networks, Aachen, Germany.
RP Bui, T (reprint author), Univ Hawaii, Honolulu, HI 96822 USA.
EM Tung.Bui@hawaii.edu; drdolk@nps.edu; Gachet@hawaii.edu;
Sebastian@or.rwth-aachen.de
NR 39
TC 0
Z9 0
U1 0
U2 1
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 1865-1348
BN 978-3-642-27611-8; 978-3-642-27612-5
J9 LECT NOTES BUS INF P
PY 2012
VL 42
BP 169
EP +
PG 4
WC Computer Science, Information Systems
SC Computer Science
GA BFD23
UT WOS:000319240600008
ER
PT B
AU Burrage, D
Wesson, J
Wang, D
Garrison, J
Quindara, N
Ganoe, G
Katzberg, S
AF Burrage, Derek
Wesson, Joel
Wang, David
Garrison, James
Quindara, Nicole
Ganoe, George
Katzberg, Stephen
GP IEEE
TI Airborne Observation of Ocean Surface Roughness Variations Using a
Combination of Microwave Radiometer and Reflectometer Systems The Second
Virginia Offshore (Virgo II) Experiment
SO 2012 WORKSHOP ON REFLECTOMETRY USING GNSS AND OTHER SIGNALS OF
OPPORTUNITY (GNSS+R)
LA English
DT Proceedings Paper
CT Workshop on Reflectometry Using GNSS and Other Signals of Opportunity
(GNSS+R)
CY OCT 10-11, 2012
CL Purdue Univ, West Lafayette, IN
SP Natl Aeronaut & Space Adm (NASA), Inst Elect & Elect Engineers-Geoscience & Remote Sensing Soc (IEEE-GRSS), Int Assoc Geodesy (IAG) Sub-Commiss 4.6
HO Purdue Univ
DE sea surface salinity; sea surface roughness; microwave radiometry and
reflectometry; brightness temperatures; bi-static radar; delay Doppler
map
ID SALINITY; WATER; MODEL
AB Airborne and satellite retrieval of Sea Surface Salinity (SSS) using L-band microwave radiometers requires accurate corrections for the influence of wind-induced Sea Surface Roughness (SSR) on the retrievals. We describe an airborne experiment, Virgo II, that combined an L-band microwave radiometer for retrieving SSS, with L- and S-band reflectometer systems for retrieving SSR descriptors including Mean Square Slope (MSS) and Wind Speed (WS) under a range of surface wind and wave conditions. The research objective is to use the SSR descriptors derived from the reflectometers to correct the brightness temperatures observed by the L-band radiometer, and produce more accurate SSS retrievals. Here we describe our experimental investigations to assess the feasibility of this approach. Preliminary comparisons of WS data retrieved from the reflectometers with coincident WS data from in situ platforms and an atmospheric circulation model indicate that after correcting for apparent biases, the reflectometry-derived SSR descriptors could, indeed, provide reliable corrections for the L- band radiometer salinity retrieval.
C1 [Burrage, Derek; Wesson, Joel; Wang, David] USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
[Garrison, James; Quindara, Nicole] Purdue Univ, Radio Nav Lab, W Lafayette, IN USA.
[Ganoe, George; Katzberg, Stephen] NASA, Langley Res Ctr, Hampton, VA USA.
RP Burrage, D (reprint author), USN, Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
EM derek.burrage@nrlssc.navy.mil; jgarriso@ecn.purdue.edu;
Stephen.j.katzberg@nasa.gov
FU Rick Aviation Inc. (Newport News, VA)
FX The expert support of Rick Aviation Inc. (Newport News, VA) for aircraft
operations is gratefully acknowledged. Philip Chu of NRL provided COAMPS
data.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-2883-8; 978-1-4673-2884-5
PY 2012
PG 6
WC Engineering, Electrical & Electronic
SC Engineering
GA BEZ72
UT WOS:000318915700008
ER
PT J
AU Siegel, PH
Alberti, S
Williams, DF
Shaw, S
Beigang, R
Davies, AG
East, J
Gallerano, GP
Grossman, EN
Jepsen, PU
Kawase, K
Koch, M
Llombart, N
Mehdi, I
Park, GS
Walker, C
AF Siegel, Peter H.
Alberti, Stefano
Williams, Dylan F.
Shaw, Sharri
Beigang, Rene
Davies, A. Giles
East, Jack
Gallerano, Gian Piero
Grossman, Erich N.
Jepsen, Peter Uhd
Kawase, Kodo
Koch, Martin
Llombart, Nuria
Mehdi, Imran
Park, Gun-Sik
Walker, Christopher
TI Untitled
SO IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
LA English
DT Editorial Material
C1 [Siegel, Peter H.] Columbia Univ, New York, NY 10027 USA.
[Alberti, Stefano] Ecole Polytech Fed Lausanne, Lausanne, Switzerland.
[Williams, Dylan F.] NIST, Electromagnet Fields Div, Boulder, CO USA.
[Shaw, Sharri] Aquinas Coll, Grand Rapids, MI USA.
[Beigang, Rene] Univ Kaiserslautern, D-67663 Kaiserslautern, Germany.
[Davies, A. Giles] Univ Leeds, Leeds, W Yorkshire, England.
[East, Jack] Univ Michigan, Elect Engn & Comp Sci Dept, Ann Arbor, MI 48109 USA.
[Gallerano, Gian Piero] Leibniz Univ Hannover, Hannover, Germany.
[Grossman, Erich N.] Univ Texas Austin, Austin, TX USA.
[Jepsen, Peter Uhd] Univ Freiburg, Freiburg, Germany.
[Kawase, Kodo] RIKEN, Wako, Saitama, Japan.
[Mehdi, Imran] CALTECH, Jet Prop Lab, Pasadena, CA USA.
[Park, Gun-Sik] USN, Res Lab, Washington, DC 20375 USA.
RP Siegel, PH (reprint author), Columbia Univ, New York, NY 10027 USA.
NR 0
TC 0
Z9 0
U1 1
U2 5
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 2156-342X
J9 IEEE T THZ SCI TECHN
JI IEEE Trans. Terahertz Sci. Technol.
PD JAN
PY 2012
VL 2
IS 1
BP 1
EP 4
DI 10.1109/TTHZ.2011.2178650
PG 4
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA 141ZP
UT WOS:000318765500001
ER
PT S
AU Xu, N
Cai, GW
Kang, W
Chen, BM
AF Xu, Nathan
Cai, Guowei
Kang, Wei
Chen, Ben M.
GP IEEE
TI Minimum-Time Trajectory Planning for Helicopter UAVs using Computational
Dynamic Optimization
SO PROCEEDINGS 2012 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN, AND
CYBERNETICS (SMC)
SE IEEE International Conference on Systems Man and Cybernetics Conference
Proceedings
LA English
DT Proceedings Paper
CT IEEE International Conference on Systems, Man, and Cybernetics (SMC)
CY OCT 14-17, 2012
CL Seoul, SOUTH KOREA
SP IEEE Systems, Man, and Cybernetics Soc (SMC), IEEE, Korea Univ, Korean Soc Cognit Sci (KSCS), Korean Inst Informat Scientists and Engineers Soc Computat Intelligence (KSCI), Hi Seoul, Korea Tourism Org, Asian Off Aerosp Res and Dev (AOARD), Natl Res Fdn Korea (NRF), World Class Univ, Korea Univ, WCU Res Div Brain and Cognit Engn
DE Minimum-time control; Helicopter UAV; computational optimal control;
obstacle avoidance
ID PSEUDOSPECTRAL METHODS; CONVERGENCE
AB In this paper, we apply pseudospectral optimal control, a computational algorithm of dynamic optimization, to the problem of helicopter UAV for minimum-time trajectory planning in the presence of obstacles. The problem is formulated as a nonlinear optimal control subject to the dynamics and limitations of helicopter UAVs, in which the obstacles are formulated as inequality constraints by using p-norms. The dynamical system is defined by a set of fifteen states nonlinear differential equations developed for HeLion, a helicopter UAV constructed in National University of Singapore (NUS). The problem does not have an analytic solution. We numerically solve the problem using a pseudospectral method. Various terrain scenarios were tested, from a single obstacle to multiple obstacles. We found bifurcation points of minimum-time trajectories near obstacles. The bifurcation points and their relationship with the distance to the obstacle are analyzed.
C1 [Xu, Nathan] USN, Summer Intern Program, Dept Appl Math, Postgrad Sch, Monterey, CA USA.
RP Xu, N (reprint author), USN, Summer Intern Program, Dept Appl Math, Postgrad Sch, Monterey, CA USA.
EM nxu@stevensonschool.org; tslcaig@nus.edu.sg; wkang@nps.edu;
bmchen@nus.edu.sg
OI Chen, Ben M./0000-0002-3839-5787
NR 8
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1062-922X
BN 978-1-4673-1714-6
J9 IEEE SYS MAN CYBERN
PY 2012
BP 2732
EP 2737
PG 6
WC Computer Science, Cybernetics; Computer Science, Information Systems;
Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEJ33
UT WOS:000316869202148
ER
PT S
AU Martinson, E
Lawson, W
Blisard, S
Harrison, A
Trafton, G
AF Martinson, E.
Lawson, W.
Blisard, S.
Harrison, A.
Trafton, G.
GP IEEE
Robotics Society of Japan
TI Fighting Fires with Human Robot Teams
SO 2012 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS
(IROS)
SE IEEE International Conference on Intelligent Robots and Systems
LA English
DT Proceedings Paper
CT 25th IEEE\RSJ International Conference on Intelligent Robots and Systems
(IROS)
CY OCT 07-12, 2012
CL Algarve, PORTUGAL
SP IEEE Robot & Automat Soc (RAS), IEEE Ind Elect Soc (IES), Robot Soc Japan (RSJ), Soc Instrument & Control Engineers (SICE), New technol Fdn (NTF), Inst Control Robot & Syst (ICROS), IEEE, Adept MobileRobots, Willow Garage, Aldebaran Robot, Natl Instruments, Reflexxes GmbH, Schunk Intec S L U
AB This video submission demonstrates cooperative human-robot firefighting. A human team leader guides the robot to the fire using a combination of speech and gesture.
C1 [Martinson, E.; Lawson, W.; Blisard, S.; Harrison, A.; Trafton, G.] USN, Res Lab, Washington, DC 20375 USA.
RP Martinson, E (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM eric.martinson.ctr@nrl.navy.mil; ed.lawson@nrl.navy.mil;
sam.blisard@nrl.navy.mil; tony.harrison@nrl.navy.mil;
greg.trafton@nrl.navy.mil
NR 2
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-0858
BN 978-1-4673-1736-8
J9 IEEE INT C INT ROBOT
PY 2012
BP 2682
EP 2683
PG 2
WC Automation & Control Systems; Computer Science, Artificial Intelligence;
Robotics
SC Automation & Control Systems; Computer Science; Robotics
GA BEK21
UT WOS:000317042703040
ER
PT S
AU Yau, J
Chung, TH
AF Yau, Joses
Chung, Timothy H.
GP IEEE
Robotics Society of Japan
TI Search-theoretic and Ocean Models for Localizing Drifting Objects
SO 2012 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS
(IROS)
SE IEEE International Conference on Intelligent Robots and Systems
LA English
DT Proceedings Paper
CT 25th IEEE\RSJ International Conference on Intelligent Robots and Systems
(IROS)
CY OCT 07-12, 2012
CL Algarve, PORTUGAL
SP IEEE Robot & Automat Soc (RAS), IEEE Ind Elect Soc (IES), Robot Soc Japan (RSJ), Soc Instrument & Control Engineers (SICE), New technol Fdn (NTF), Inst Control Robot & Syst (ICROS), IEEE, Adept MobileRobots, Willow Garage, Aldebaran Robot, Natl Instruments, Reflexxes GmbH, Schunk Intec S L U
AB This paper investigates the combined use of ocean models, such as idealized surface current flows, and search models, including expanding area and discrete myopic search methods, to improve the probability of detecting a near-surface, drifting object over time. Enhanced search effectiveness is facilitated by the use of robotic search agents, such as a tactical unmanned aerial vehicle (UAV), leveraging simulation methods to inform the search process. The presented work investigates the impact of using naive vs. optimized search patterns on localizing a drifting object, including a surrogate ocean model using idealized flow with Weibull-distributed perturbations. Numerical studies and extensive analysis using different permutations of model parameters (including the relative speed of the drifting object, time late in the searcher's arrival to the search area, sensor sweep width, and duration of the search mission) identify the significant factors affecting the overall probability of detection. Such insights enable further explorations using empirical datasets for specific oceanographic regions of interest.
C1 [Yau, Joses] USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
RP Yau, J (reprint author), USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA.
EM myau@nps.edu; thchung@nps.edu
NR 15
TC 1
Z9 1
U1 1
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-0858
BN 978-1-4673-1736-8
J9 IEEE INT C INT ROBOT
PY 2012
BP 4749
EP 4755
PG 7
WC Automation & Control Systems; Computer Science, Artificial Intelligence;
Robotics
SC Automation & Control Systems; Computer Science; Robotics
GA BEK21
UT WOS:000317042705052
ER
PT S
AU Parker, JF
Cheek, GT
Roeper, DF
O'Grady, WE
AF Parker, J. F.
Cheek, G. T.
Roeper, D. F.
O'Grady, W. E.
BE Trulove, PC
DeLong, HC
Mantz, RA
TI Electronic Absorption and Voltammetric Analysis of Ni(II) Coordination
in the Room Temperature Ionic Liquid 1-Ethyl-3-Methylimidizolium
Chloride/Aluminum Chloride
SO PHYSICAL AND ANALYTICAL ELECTROCHEMISTRY IN IONIC LIQUIDS 2
SE ECS Transactions
LA English
DT Proceedings Paper
CT Symposium on Physical and Analytical Electrochemistry in Ionic Liquids 2
held during the 220th Meeting of the Electrochemical-Society
CY OCT 09-14, 2011
CL Boston, MA
SP Electrochem Soc (ECS), Phys & Analyt Electrochemistry
ID MOLTEN ALUMINUM-CHLORIDE; TETRAHEDRAL NICL4= ION; NICKEL CHLORIDE;
SILICATE MELTS; METAL IONS; LICL-KCL; SPECTRA; ELECTRODEPOSITION;
BEHAVIOR; SALT
AB The coordination chemistry of Ni(II) in the ionic liquid aluminum chloride : 1-ethyl-3-methyl imidazolium chloride (EMIC) has been determined using visible absorption spectrophotometry. By dissolving nickel chloride (NiCl2) in Lewis acidic and basic ionic liquids and observing the resultant spectra and voltammetric information, one can determine the coordination and electron-transfer properties of Ni(II) at the various acidities. The optical data indicate the formation of tetrahedral NiCl42- in the ionic liquid with excess EMIC (basic melt, N-AlCl3 < 0.5) with absorption maxima at 659 and 707 nm. In acidic melts (N-AlCl3 > 0.5), the wavelength of maximum absorbance shifts to 462 nm. This dramatic change in the visible spectrum is indicative of a change in the coordination of Ni(II) from tetrahedral (basic) to octahedral (acidic) geometry, changes which are mirrored in the cyclic voltammetry data of the same samples. Studies in the neutral melt are also presented here.
C1 [Parker, J. F.; O'Grady, W. E.] USN, Res Lab, Code 6130, Washington, DC 20375 USA.
[Cheek, G. T.] US Naval Acad, Dept Chem, Annapolis, MD 21402 USA.
[Roeper, D. F.] CEXCET Inc, Springfield, VA 22151 USA.
RP Parker, JF (reprint author), USN, Res Lab, Code 6130, Washington, DC 20375 USA.
FU Office of Naval Research; National Research Council (NRC)
FX The authors would like to acknowledge the financial support of the
Office of Naval Research and the National Research Council (NRC). J.P.
also thanks James Wynne and Jeffrey Lundin for the use of the Agilent
UV-Vis system.
NR 27
TC 3
Z9 3
U1 3
U2 15
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-335-3; 978-1-56677-976-0
J9 ECS TRANSACTIONS
PY 2012
VL 41
IS 36
BP 23
EP 33
DI 10.1149/1.4703919
PG 11
WC Electrochemistry
SC Electrochemistry
GA BEW49
UT WOS:000318405300004
ER
PT S
AU Cheek, GT
AF Cheek, G. T.
BE Trulove, PC
DeLong, HC
Mantz, RA
TI Voltammetric Investigations of the Fries Rearrangement in an Ionic
Liquid
SO PHYSICAL AND ANALYTICAL ELECTROCHEMISTRY IN IONIC LIQUIDS 2
SE ECS Transactions
LA English
DT Proceedings Paper
CT Symposium on Physical and Analytical Electrochemistry in Ionic Liquids 2
held during the 220th Meeting of the Electrochemical-Society
CY OCT 09-14, 2011
CL Boston, MA
SP Electrochem Soc (ECS), Phys & Analyt Electrochemistry
AB The electrochemical behavior of phenyl benzoate (PB) in the neutral AlCl3 : 1-ethyl-3-methylimidazolium chloride ionic liquid has been studied. Addition of HfCl4 to phenyl benzoate in this medium produces a positive potential shift for the phenyl benzoate reduction process. Heating the solution to 80 degrees C for 30 hours gives 4-hydroxybenzophenone as the major product. Cyclic voltammetric studies show that HfCl4 reacts with the ionic liquid to produce relatively small amounts of Al2Cl7-, so that HfCl4 is still the principal Lewis acid in this system. Comparison studies using added AlCl3 in place of HfCl4 show similar behavior, with a somewhat different potential shift for the AlCl3 : PB interaction.
C1 USN Acad, Dept Chem, Annapolis, MD 21402 USA.
RP Cheek, GT (reprint author), USN Acad, Dept Chem, Annapolis, MD 21402 USA.
NR 7
TC 3
Z9 3
U1 0
U2 2
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-335-3
J9 ECS TRANSACTIONS
PY 2012
VL 41
IS 36
BP 35
EP 41
DI 10.1149/1.4703920
PG 7
WC Electrochemistry
SC Electrochemistry
GA BEW49
UT WOS:000318405300005
ER
PT J
AU Khan, F
Legler, PM
Mease, RM
Duncan, EH
Bergmann-Leitner, ES
Angov, E
AF Khan, Farhat
Legler, Patricia M.
Mease, Ryan M.
Duncan, Elizabeth H.
Bergmann-Leitner, Elke S.
Angov, Evelina
TI Histidine affinity tags affect MSP1(42) structural stability and
immunodominance in mice
SO BIOTECHNOLOGY JOURNAL
LA English
DT Article
DE Histidine tag; Immune deviation; Immunodominance; Neo-epitope; Protein
structure
ID MEROZOITE SURFACE PROTEIN-1; PLASMODIUM-FALCIPARUM; RECOMBINANT
PROTEINS; MONOCLONAL-ANTIBODY; ESCHERICHIA-COLI; FINE-SPECIFICITY; SERUM
ANTIBODIES; MALARIA VACCINE; TAGGED PROTEIN; BINDING-SITE
AB Inclusion of affinity tags has greatly facilitated process development for protein antigens, primarily for their recovery from complex mixtures. Although generally viewed as supportive of product development, affinity tags may have unintended consequences on protein solubility, susceptibility to aggregation, and immunogenicity. Merozoite surface protein 1 (MSP1), an erythrocytic stage protein of Plasmodium falciparum and a candidate malaria vaccine, was used to evaluate the impact of a metal ion affinity-tag on both protein structure and the induction of immunity. To this end, codon harmonized gene sequences from the P. falciparum MSP1(42) of FVO and 3D7 parasites were cloned and purified with and without a histidine (His) tag. We report on the influence of His-affinity tags on protein expression levels, solubility, secondary structure, thermal denaturation, aggregation and the impact on humoral and cellular immune responses in mice. While the overall immunogenicity induced by His-tagged MSP1(42) proteins is greater, the fine specificity of the humoral and cellular immune responses is altered relative to anti-parasitic antibody activity and the breadth of T-cell responses. Thus, the usefulness of protein tags may be outweighed by their potential impact on structure and function, stressing the need for caution in their use.
C1 [Khan, Farhat; Mease, Ryan M.; Duncan, Elizabeth H.; Bergmann-Leitner, Elke S.; Angov, Evelina] Walter Reed Army Inst Res, Mil Malaria Res Program, Malaria Vaccine Branch, Silver Spring, MD 20910 USA.
[Legler, Patricia M.] USN, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC 20375 USA.
RP Angov, E (reprint author), Walter Reed Army Inst Res, Mil Malaria Res Program, Malaria Vaccine Branch, 503 Robert Grant Ave, Silver Spring, MD 20910 USA.
EM Evelina.angov@us.army.mil
RI Bergmann-Leitner, Elke/B-3548-2011
OI Bergmann-Leitner, Elke/0000-0002-8571-8956
FU U.S. Agency for International Development [936-3118,
GHA-T-00-08-00007-01]; United States Army Medical Research and Materiel
Command
FX We thank Dr. Carissa M. Soto at the Naval Research Laboratories for
assistance and use of the NanoSight particle tracking system. This work
was supported by the U.S. Agency for International Development under
project number 936-3118, award number GHA-T-00-08-00007-01, and by the
United States Army Medical Research and Materiel Command.
NR 56
TC 25
Z9 26
U1 1
U2 12
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1860-6768
J9 BIOTECHNOL J
JI Biotechnol. J.
PD JAN
PY 2012
VL 7
IS 1
SI SI
BP 133
EP 147
DI 10.1002/biot.201100331
PG 15
WC Biochemical Research Methods; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA 133PS
UT WOS:000318151900006
PM 22076863
ER
PT B
AU Rue, JPH
Dickens, JF
Kilcoyne, KG
AF Rue, John-Paul H.
Dickens, Jonathan F.
Kilcoyne, Kelly G.
BE Ma, CB
Feeley, BT
TI MANAGEMENT OF THE BICEPS TENDON IN THE SETTING OF ROTATOR CUFF TEARS
SO BASIC PRINCIPLES AND OPERATIVE MANAGEMENT OF THE ROTATOR CUFF
LA English
DT Article; Book Chapter
ID LONG-HEAD; FOLLOW-UP; SUBSCAPULARIS TENDON; IMPINGEMENT SYNDROME;
ARTHROSCOPIC REPAIR; SLAP LESIONS; ELECTROMYOGRAPHIC ANALYSIS;
GLENOHUMERAL JOINT; INTERFERENCE SCREW; PROSPECTIVE COHORT
C1 [Rue, John-Paul H.] USN Acad, Dept Orthoped Surg & Sports Med, Naval Hlth Clin Annapolis, Annapolis, MD 21402 USA.
[Rue, John-Paul H.] Uniformed Serv Univ Hlth Sci, Dept Surg, Bethesda, MD 20814 USA.
[Dickens, Jonathan F.; Kilcoyne, Kelly G.] Walter Reed Natl Mil Med, Dept Orthoped, Bethesda, MD USA.
RP Rue, JPH (reprint author), USN Acad, Dept Orthoped Surg & Sports Med, Naval Hlth Clin Annapolis, Annapolis, MD 21402 USA.
NR 86
TC 0
Z9 0
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE ROAD, THOROFARE, NJ 08086-9447 USA
BN 978-1-61711-004-7
PY 2012
BP 223
EP 241
PG 19
WC Surgery
SC Surgery
GA BEI55
UT WOS:000316713000018
ER
PT S
AU Hackman, C
Matsakis, D
AF Hackman, Christine
Matsakis, Demetrios
GP IEEE
TI Precision and Accuracy of USNO GPS Carrier Phase Time Transfer: 2012
Update
SO 2012 IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM (FCS)
SE IEEE International Frequency Control Symposium
LA English
DT Proceedings Paper
CT IEEE International Frequency Control Symposium (IFCS)
CY MAY 21-24, 2012
CL Baltimore, MD
SP IEEE, UFFC
AB The United States Naval Observatory (USNO) produces GPS carrier-phase time-transfer (GPSCPTT) estimates for approximately 100 receiver clocks daily. All estimates are available with 16-h latency; a subset of approximately 34 are available every 6 h with 3-h latency plus 24 h of predictions. The once-per-day post-processed estimates are referred to as. rapids. (USR); the four-times-per/day estimates/predictions are referred to as. ultra-rapids. (USU). The ultra-rapids are suitable for real-time applications. We investigate the uncertainty of USR and the first 6 h of USU predictions by comparing them to four weeks of IGS Final Clock solutions along 4-6 timing links. No day-boundary discontinuities (DBDs) were removed. USR exhibited a 60-100 ps RMS difference and a few to tens of picoseconds time stability with respect to the IGS Finals, supporting an estimate of 125 ps USR standalone time stability. White FM characterized the USR-IGS difference for most averaging times observed, with USR-IGS frequency stabilities of 0.9-2.10(-15) at averaging time tau = 1 d. DBD removal would likely improve that value. USU clock predictions exhibited bi-modal performance with respect to IGS Finals, with links to site WES2 exhibiting noticeably worse behavior than links not utilizing it. USU-IGS differences were 139-220 and 470-584 ps RMS. USU-IGS time stabilities of 133 ps or better were observed for non-WES2 links, supporting an estimate of 153 ps time stability for USU clock predictions. Non-WES2 USU-IGS frequency stabilities exhibited 8.10(-1)4 - 8.10(-15) frequency stabilities for tau < 6 h (the prediction length).
C1 [Hackman, Christine; Matsakis, Demetrios] USN Observ, Washington, DC 20392 USA.
RP Hackman, C (reprint author), USN Observ, Washington, DC 20392 USA.
EM christine.hackman@usno.navy.mil
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1075-6787
BN 978-1-4577-1819-9
J9 P IEEE INT FREQ CONT
PY 2012
PG 6
WC Engineering, Electrical & Electronic; Physics, Applied;
Telecommunications
SC Engineering; Physics; Telecommunications
GA BEJ76
UT WOS:000316994400013
ER
PT S
AU Hanssen, JL
Crane, SG
Ekstrom, CR
AF Hanssen, J. L.
Crane, S. G.
Ekstrom, C. R.
GP IEEE
TI One-Way Two-Color Fiber Link for Frequency Transfer
SO 2012 IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM (FCS)
SE IEEE International Frequency Control Symposium
LA English
DT Proceedings Paper
CT IEEE International Frequency Control Symposium (IFCS)
CY MAY 21-24, 2012
CL Baltimore, MD
SP IEEE, UFFC
AB We discuss our work on two-color one-way frequency transfer over optical fiber. We have expanded on our previous work by extending the wavelength separation by using one channel in the C band at 1553nm and the other channel in the O band at 1310nm. Both wavelengths have low loss and are well suited to use in optical fiber networks. We present measurements of the improved two-color phase delay as a function of temperature and compare that to the actual phase delay brought about by temperature induced length changes in the link. We also show improved closed loop performance of the link, including the dependence on the total length of the link.
C1 [Hanssen, J. L.; Crane, S. G.; Ekstrom, C. R.] USN Observ, Time Serv Dept, Washington, DC 20392 USA.
RP Hanssen, JL (reprint author), USN Observ, Time Serv Dept, Washington, DC 20392 USA.
EM james.hanssen@usno.navy.mil
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1075-6787
BN 978-1-4577-1819-9
J9 P IEEE INT FREQ CONT
PY 2012
PG 4
WC Engineering, Electrical & Electronic; Physics, Applied;
Telecommunications
SC Engineering; Physics; Telecommunications
GA BEJ76
UT WOS:000316994400096
ER
PT S
AU Peil, S
Crane, S
Hanssen, J
Swanson, TB
Ekstrom, CR
AF Peil, Steven
Crane, Scott
Hanssen, James
Swanson, Thomas B.
Ekstrom, Christopher R.
GP IEEE
TI An Ensemble of Atomic Fountains
SO 2012 IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM (FCS)
SE IEEE International Frequency Control Symposium
LA English
DT Proceedings Paper
CT IEEE International Frequency Control Symposium (IFCS)
CY MAY 21-24, 2012
CL Baltimore, MD
SP IEEE, UFFC
AB Four rubidium fountains have been in operation for the past 1.2 years at USNO. Individual fountain performance, applications to timekeeping and to tests of Local Position Invariance are presented.
C1 [Peil, Steven; Crane, Scott; Hanssen, James; Swanson, Thomas B.; Ekstrom, Christopher R.] USN Observ, Clock Dev Div, Washington, DC 20392 USA.
RP Peil, S (reprint author), USN Observ, Clock Dev Div, Washington, DC 20392 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1075-6787
BN 978-1-4577-1819-9
J9 P IEEE INT FREQ CONT
PY 2012
PG 4
WC Engineering, Electrical & Electronic; Physics, Applied;
Telecommunications
SC Engineering; Physics; Telecommunications
GA BEJ76
UT WOS:000316994400092
ER
PT S
AU Yamamoto, KK
Vecherin, SN
Wilson, DK
Borden, CT
Bettencourt, E
Pettit, CL
AF Yamamoto, Kenneth K.
Vecherin, Sergey N.
Wilson, D. Keith
Borden, Christian T.
Bettencourt, Elizabeth
Pettit, Chris L.
BE Pritchard, DA
TI General Software for Multimodal Signal Modeling and Optimal Sensor
Placement Environmental Awareness for Sensor and Emitter Employment
(EASEE)
SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY
TECHNOLOGY
SE International Carnahan Conference on Security Technology Proceedings
LA English
DT Proceedings Paper
CT 46th Annual IEEE International Carnahan Conference on Security
Technology (ICCST)
CY OCT 15-18, 2012
CL Boston, MA
SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat
DE intrusion detection; sensors; surveillance; signal modeling;
environmental effects; decision-support tool; homeland security; mission
planning; battlefield command and control (C2); object-oriented
programming
ID CONCENTRATION FLUCTUATIONS; SOUND-PROPAGATION; PLUMES
AB The Environmental Awareness for Sensor and Emitter Employment (EASEE) software is designed to help in surveillance planning by predicting detection performance of sensors and optimizing sensor selection and placement for intrusion detection around any controlled area, including power plants, dams, borders, prisons, military bases, combat outposts, etc. By its flexible, object-oriented software architecture, EASEE can simulate the performance of a wide variety of sensor modalities-including optical, acoustic, seismic, magnetic, radio-frequency, chemical, and biological-in the realistic terrain and weather conditions of the surveillance environment. EASEE characterizes complex terrain and weather effects on target signatures, signal propagation, and sensor systems, using an expansive library of realistic physics models. Statistical methodologies are also used to account for uncertainties from random signal-generation and propagation mechanisms. A built-in sensor placement algorithm optimizes sensor selections and placements based on sensor supply limitations, coverage priorities, overlapping sensor coverage preferences, and wireless sensor communication requirements.
C1 [Yamamoto, Kenneth K.; Vecherin, Sergey N.; Wilson, D. Keith] USA, ERDC CRREL, Hanover, NH 02420 USA.
[Borden, Christian T.; Bettencourt, Elizabeth] AER Inc, Lexington, MA 02421 USA.
[Pettit, Chris L.] US Naval Acad, Annapolis, MD 21402 USA.
RP Yamamoto, KK (reprint author), USA, ERDC CRREL, Hanover, NH 02420 USA.
EM Kenneth.K.Yamamoto@usace.army.mil
RI Wilson, D. Keith/A-4687-2012
OI Wilson, D. Keith/0000-0002-8020-6871
FU U.S. Army ERDC Geospatial Research and Engineering; Military
Engineering; ASA(ALT) Deployable Force Protection S&T Program Leaders
Mission Planning Tool (LMPT); Postgraduate Research Participation
Program at the U.S. Army Cold Regions Research and Engineering
Laboratory (CRREL); Oak Ridge Institute for Science and Education
(ORISE); U.S. Department of Energy; CRREL
FX Funding for this effort was provided by the U.S. Army ERDC Geospatial
Research and Engineering, and Military Engineering business areas, and
by the ASA(ALT) Deployable Force Protection S&T Program Leaders Mission
Planning Tool (LMPT) project. Development of the EASEE- Raptor interface
described in Section V is part of the LMPT project, which is led by the
U.S. Army Night Vision and Electronic Sensors Directorate. Dr.
Vecherin's work was performed during an appointment to the Postgraduate
Research Participation Program at the U.S. Army Cold Regions Research
and Engineering Laboratory (CRREL) administrated by the Oak Ridge
Institute for Science and Education (ORISE) through an interagency
agreement between the U.S. Department of Energy and CRREL.
NR 23
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1071-6572
BN 978-1-4673-2451-9
J9 INT CARN CONF SECU
PY 2012
BP 66
EP 77
PG 12
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BEJ66
UT WOS:000316952800010
ER
PT S
AU Lock, EH
North, SH
Wojciechowski, J
Taitt, CR
Walton, SG
AF Lock, E. H.
North, S. H.
Wojciechowski, J.
Taitt, C. R.
Walton, S. G.
BE Vaseashta, A
Braman, E
Susmann, P
TI Exploring the Mechanism of Biomolecule Immobilization on Plasma-Treated
Polymer Substrates Biomolecule Immobilization on Plasma-Treated Polymer
SO TECHNOLOGICAL INNOVATIONS IN SENSING AND DETECTION OF CHEMICAL,
BIOLOGICAL, RADIOLOGICAL, NUCLEAR THREATS AND ECOLOGICAL TERRORISM
SE NATO Science for Peace and Security Series A-Chemistry and Biology
LA English
DT Proceedings Paper
CT Conference on Technological Innovations in Detection and Sensing of
Chemical, Biological, Radiological, Nuclear Threats and Ecological
Terrorism
CY JUN 06-17, 2010
CL Chisinau, MOLDOVA
SP NATO Adv Study Inst
ID BEAM-GENERATED PLASMAS; SURFACE
AB An electron beam-generated plasma source developed at NRL was used to modify polystyrene microtitre plates. A combination of complementary surface analytical and biochemical techniques was applied to evaluate the relationship between the biotic and abiotic layers, with particular emphasis on the efficiency of the preparation of polymer surfaces and its effectiveness for bioimmobilization. We conclude that the development of novel interface materials with superior transducing capabilities is dependent on the deeper understanding of the complex physicochemical, nanoscale interactions between the substrate surface and the biological components attached to it.
C1 [Lock, E. H.; Walton, S. G.] USN, Res Lab, Div Plasma Phys, 4555 Overlook Ave SW, Washington, DC 20375 USA.
[North, S. H.; Wojciechowski, J.; Taitt, C. R.] US Naval Acad, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC USA.
RP Lock, EH (reprint author), USN, Res Lab, Div Plasma Phys, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM evgeniya.lock@nrl.navy.mil
FU Joint Science & Technology Office for Chemical & Biological Defense/
Defense Threat Reduction Agency; Offi ce of Naval Research
FX J. W. is recipient of an American Society of Engineering Education
postdoctoral fellowship. This work is funded by Joint Science &
Technology Office for Chemical & Biological Defense/ Defense Threat
Reduction Agency and the Offi ce of Naval Research. The views expressed
here are those of the authors and do not represent the opinions of the
U. S. Navy, the U. S. Department of Defense, or the U. S. government.
NR 13
TC 0
Z9 0
U1 0
U2 5
PU SPRINGER
PI DORDRECHT
PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
SN 1874-6489
BN 978-94-007-2488-4; 978-94-007-2487-7
J9 NATO SCI PEACE SEC A
JI NATO Sci. Peace Secur. Ser. A-Chem. Biol.
PY 2012
BP 237
EP 244
DI 10.1007/978-94-007-2488-4_26
PG 8
WC Biotechnology & Applied Microbiology; Nanoscience & Nanotechnology;
Instruments & Instrumentation; Physics, Condensed Matter
SC Biotechnology & Applied Microbiology; Science & Technology - Other
Topics; Instruments & Instrumentation; Physics
GA BEL55
UT WOS:000317232300026
ER
PT S
AU Bewley, WW
Kim, CS
Kim, M
Merritt, CD
Canedy, CL
Vurgaftman, I
Abell, J
Meyer, JR
AF Bewley, William W.
Kim, Chul Soo
Kim, Mijin
Merritt, Charles D.
Canedy, Chadwick L.
Vurgaftman, Igor
Abell, Joshua
Meyer, Jerry R.
GP IEEE
TI Epitaxial-Side-Down-Mounted Interband Cascade Lasers
SO 2012 23RD IEEE INTERNATIONAL SEMICONDUCTOR LASER CONFERENCE (ISLC)
SE IEEE International Semiconductor Laser Conference
LA English
DT Proceedings Paper
CT 23rd IEEE International Semiconductor Laser Conference (ISLC)
CY OCT 07-10, 2012
CL San Diego, CA
SP IEEE
C1 [Bewley, William W.; Kim, Chul Soo; Merritt, Charles D.; Canedy, Chadwick L.; Vurgaftman, Igor; Abell, Joshua; Meyer, Jerry R.] US Naval, Res Lab, Code 5613, Washington, DC 20375 USA.
[Kim, Mijin] Sotera Def Solut, v, MacLean, VA 22102 USA.
RP Bewley, WW (reprint author), US Naval, Res Lab, Code 5613, Washington, DC 20375 USA.
NR 3
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2326-5442
BN 978-1-4577-0828-2
J9 IEEE INT SEMICONDUCT
PY 2012
BP 26
EP +
PG 2
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BEJ09
UT WOS:000316820100014
ER
PT S
AU Brutzman, D
McGhee, R
Davis, D
AF Brutzman, Don
McGhee, Robert
Davis, Duane
GP IEEE
TI An Implemented Universal Mission Controller with Run Time Ethics
Checking for Autonomous Unmanned Vehicles-a UUV Example
SO 2012 IEEE/OES AUTONOMOUS UNDERWATER VEHICLES (AUV)
SE IEEE OES Autonomous Underwater Vehicles
LA English
DT Proceedings Paper
CT IEEE/OES Autonomous Underwater Vehicles Conference (AUV)
CY SEP 24-27, 2012
CL Southampton, ENGLAND
SP Inst Elect and Elect Engineers (IEEE), Oceanic Engn Soc (OES), Natl Oceanog Ctr, KONGSBERG, Hydroid, Ocean Business, RS Aqua, Teledyne RD Instruments, EdgeTech, Seebyte, Sonardyne
DE AUV; UUV; autonomous robot control; ethical robot control; Turing
machine
AB The authors have been involved for several decades in the development and testing of both remotely controlled and autonomous subsea and ground vehicles. This experience has led us to view autonomous mobile robot control problems from both a bottom up and a top down perspective. Specifically, in our work, we have developed and tested a three-level software architecture called Rational Behavior Model (RBM), in which a top (strategic) level mission control finite state machine (FSM) orders the rational execution, at an intermediate (tactical) level, of vehicle behaviors in such a way as to carry out a specified mission. This implementation experience and these principles have led us to believe that human-like intelligence and judgment are not required to achieve a useful operational capability in autonomous mobile robots. Furthermore, we are convinced that a primitive but useful type of robot ethical behavior can also be attained, even in hazardous or military environments, without invoking concepts of artificial intelligence. To support our views, we present a software invention called a mission execution engine (MEE), implemented in the Prolog logic programming language. This MEE can be shown to represent an extension of the idea of a universal Turing machine and is therefore well grounded in existing mathematical automata theory. We further show how human readable mission orders, also written in Prolog, can specialize an MEE to any desired mission control FSM. An important aspect of our work is that mission orders can be tested exhaustively in human executable form before being translated into robot executable form. This provides the kind of transparency and accountability needed for after action review of missions, and possible legal proceedings in case of loss of life or property resulting from errors in mission orders.
C1 [Brutzman, Don; McGhee, Robert; Davis, Duane] USN, Postgrad Sch, Modeling Virtual Environm & Simulat MOVES Inst, Monterey, CA USA.
RP Brutzman, D (reprint author), USN, Postgrad Sch, Modeling Virtual Environm & Simulat MOVES Inst, Monterey, CA USA.
EM brutzman@nps.edu; robertbmcghee@gmail.com; dtdavi1@nps.edu
NR 16
TC 0
Z9 0
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3167
BN 978-1-4577-2056-7
J9 IEEE AUTO UNDER VEH
PY 2012
PG 7
WC Engineering, Ocean
SC Engineering
GA BEJ37
UT WOS:000316895100027
ER
PT S
AU Horner, D
Xie, G
AF Horner, Douglas
Xie, Geoffrey
GP IEEE
TI Undersea Acoustic Communication Maps for Collaborative Navigation
SO 2012 IEEE/OES AUTONOMOUS UNDERWATER VEHICLES (AUV)
SE IEEE OES Autonomous Underwater Vehicles
LA English
DT Proceedings Paper
CT IEEE/OES Autonomous Underwater Vehicles Conference (AUV)
CY SEP 24-27, 2012
CL Southampton, ENGLAND
SP Inst Elect & Elect Engineers (IEEE), Oceanic Engn Soc (OES), Natl Oceanog Ctr, KONGSBERG, Hydroid, Ocean Business, RS Aqua, Teledyne RD Instruments, EdgeTech, Seebyte, Sonardyne
AB Communications play a key role in collaborative navigation algorithms. A better understanding of the ability to send and receive messages permits greater navigational flexibility and system robustness. This paper focuses on the building of an underwater acoustic communications map for collaborative navigation. The emphasis is in two areas - a local and global communications map. The local communications is defined with respect to a single destination reference point. Using a sample set of a priori signal to noise ratio acoustic modem data, Kriging techniques are used to create mean and variance map estimates. The global communications map is a compendium of local maps and is defined within a bounded survey space. Bayesian Inferencing is used for building the global map. It is based on REML parameter estimation of an anisotropic covariance function. The paper analyzes acoustic communication signal to noise datasets recently collected in Monterey Harbor, Monterey, CA and is used to demonstrate the above-described techniques.
C1 [Horner, Douglas] USN, Postgrad Sch, Dept Mech & Aeronaut Engn, Monterey, CA 93943 USA.
[Xie, Geoffrey] USN, Postgrad Sch, Dept Comp Sci, Monterey, CA 93943 USA.
RP Horner, D (reprint author), USN, Postgrad Sch, Dept Mech & Aeronaut Engn, Monterey, CA 93943 USA.
EM dphorner@nps.edu; xie@nps.edu
NR 14
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3167
BN 978-1-4577-2056-7
J9 IEEE AUTO UNDER VEH
PY 2012
PG 7
WC Engineering, Ocean
SC Engineering
GA BEJ37
UT WOS:000316895100040
ER
PT B
AU Linderman, MH
Chase, G
Boury-Brisset, AC
Nevitt, J
Henley, J
Read, R
Russell, S
Hyden, P
AF Linderman, Mark H.
Chase, Greg
Boury-Brisset, Anne-Claire
Nevitt, Justin
Henley, Justin
Read, Robert
Russell, Stephen
Hyden, Paul
BE Blasch, E
Bosse, E
Lambert, DA
TI The Role of Information Management to Support High-Level Fusion
SO HIGH-LEVEL INFORMATION FUSION MANAGEMENT AND SYSTEMS DESIGN
SE Artech House Intelligence and Information Operations Series
LA English
DT Article; Book Chapter
AB High-level information fusion (HLIF) processes are critically dependent on quality information sources in order to generate meaningful outcomes. Quality information necessitates the right combination of people, processes, and tools to form an effective information space. This critical task is generally known as Information Management (IM). This chapter overviews IM, discusses IM goals and challenges in a coalition environment, and presents an IM model. The model provides an abstract representation of the important artifacts, actors and services that are required to form an effective IM capability. After a brief exposition of the model, IM best practices are considered. IM issues of particular interest to fusion scenarios are identified, including the information lifecycle that exists between the sensors and information exploitation (IX) systems, interoperability issues, information context, partially structured information, IM as a service, IM workflows, and IM from an agent perspective.
C1 [Linderman, Mark H.] USAF, Res Lab, Informat Directorate, Rome, NY 13441 USA.
[Chase, Greg] DSTO, Edinburgh, SA 5111, Australia.
[Boury-Brisset, Anne-Claire] Def Resarch & Dev Canada Valcartier, Quebec City, PQ G3J 1X5, Canada.
[Nevitt, Justin; Russell, Stephen; Hyden, Paul] USN, Res Lab, Washington, DC 20375 USA.
[Henley, Justin] DSTL, Portsdown West PO17 6AD, Fareham, England.
[Read, Robert] DTA, Auckland 0744, New Zealand.
RP Linderman, MH (reprint author), USAF, Res Lab, Informat Directorate, 525Brooks Rd, Rome, NY 13441 USA.
EM mark.linderman@rl.af.mil; gregchase@adam.com.au;
Anne-Claire.Boury-Brisset@drdc-rddc.gc.ca; justin.nevitt@nrl.navy.mil;
JTHENLEY@mail.dstl.gov.uk; r.read@dta.mil.nz;
stephen.russell@nrl.navy.mil; paul.hyden@nrl.navy.mil
NR 17
TC 0
Z9 0
U1 0
U2 0
PU ARTECH HOUSE
PI NORWOOD
PA 685 CANTON ST, NORWOOD, MA 02062 USA
BN 978-1-60807-151-7
J9 ARTECH HSE INTEL INF
PY 2012
BP 105
EP 135
PG 31
WC Computer Science, Information Systems
SC Computer Science
GA BEL07
UT WOS:000317148000005
ER
PT S
AU Johannes, MD
Hoang, K
Allen, JL
Gaskell, K
AF Johannes, M. D.
Khang Hoang
Allen, J. L.
Gaskell, K.
BE Julien, CM
Meng, S
Zaghib, K
Kanno, R
TI Formation of small hole polarons in olivine phosphate cathode materials
SO INTERCALATION COMPOUNDS FOR RECHARGEA BLE BATTERIES
SE ECS Transactions
LA English
DT Proceedings Paper
CT Symposium on Intercalation Compounds for Rechargeable Batteries held
during the 220th Meeting of the Electrochemical-Society (ECS)
CY OCT 09-14, 2011
CL Boston, MA
SP Electrochem Soc (ECS), Battery, Energy Technol
ID TOTAL-ENERGY CALCULATIONS; AUGMENTED-WAVE METHOD; LITHIUM BATTERIES;
BASIS-SET; LICOPO4; CAPACITY; FE
AB We investigate small hole polaron formation in olivine phosphate materials, LiMnPO4, LiFePO4, LiCoPO4 and LiNiPO4, using a combination of first principles calculations and experimental XPS spectra. We determine that details of the electronic structure near the Fermi energy, relevant to localization of a hole polaron, are not accurately captured using the standard GGA+U methodology and require a hybrid functional approach. We show that polaron formation is possible in all but the Ni-based compound and discuss the possibility of an electronic instability caused by electron withdrawal during delithiation caused by oxygen evolution.
C1 [Johannes, M. D.; Khang Hoang] USN, Ctr Computat Mat Sci, Res Lab, Washington, DC 20375 USA.
RP Johannes, MD (reprint author), USN, Ctr Computat Mat Sci, Res Lab, Washington, DC 20375 USA.
RI Hoang, Khang/C-2879-2008
OI Hoang, Khang/0000-0003-1889-0745
NR 23
TC 0
Z9 0
U1 1
U2 12
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-328-5; 978-1-56677-969-2
J9 ECS TRANSACTIONS
PY 2012
VL 41
IS 29
BP 35
EP 42
DI 10.1149/1.3696682
PG 8
WC Electrochemistry; Energy & Fuels
SC Electrochemistry; Energy & Fuels
GA BEI36
UT WOS:000316695900006
ER
PT S
AU Shaw, A
Calhoun, RL
AF Shaw, A.
Calhoun, R. L.
BE Mantz, RA
Suroviec, A
TI Electrogenerated Chemiluminescence with Ruthenium Trisbipyridine and
TATP
SO PHYSICAL AND ANALYTICAL ELECTROCHEMISTRY (GENERAL SESSION) - 220TH ECS
MEETING
SE ECS Transactions
LA English
DT Proceedings Paper
CT Symposium on Physical and Analytical Electrochemistry General Session
held during the 220th Meeting of the Electrochemical-Society (ECS)
CY OCT 09-14, 2011
CL Boston, MA
SP Electrochem Soc (ECS), Phys and Analyt Electrochemistry
ID PEROXIDE
AB Interaction of the explosive triacetone triperoxide (TATP) with the electrogenerated chemiluminescence (ECL) of Ru(bpy)(3)(2+) in acetonitrile was studied. The analyte greatly reduces the light made during the annihilation mechanism yielding ppb level detection. The mechanism is thought to be EEC' during reduction which reduces the light by oxidizing the Ru(bpy)(3)(+) before it can react with Ru(bpy)(3)(3+).
C1 [Shaw, A.; Calhoun, R. L.] USN Acad, Dept Chem, Annapolis, MD 21412 USA.
RP Shaw, A (reprint author), USN Acad, Dept Chem, Annapolis, MD 21412 USA.
NR 9
TC 1
Z9 1
U1 1
U2 3
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-326-1
J9 ECS TRANSACTIONS
PY 2012
VL 41
IS 27
BP 49
EP 56
DI 10.1149/1.3692523
PG 8
WC Electrochemistry
SC Electrochemistry
GA BEJ31
UT WOS:000316864800007
ER
PT S
AU Foley, MP
Seo, DM
Worosz, CJ
Boyle, PD
Henderson, WA
De Long, HC
Trulove, PC
AF Foley, M. P.
Seo, D. M.
Worosz, Christopher J.
Boyle, P. D.
Henderson, W. A.
De Long, H. C.
Trulove, P. C.
BE Mantz, RA
Suroviec, A
TI Phase Behavior and Solvation of Lithium Triflate in Ethylene Carbonate
SO PHYSICAL AND ANALYTICAL ELECTROCHEMISTRY (GENERAL SESSION) - 220TH ECS
MEETING
SE ECS Transactions
LA English
DT Proceedings Paper
CT Symposium on Physical and Analytical Electrochemistry General Session
held during the 220th Meeting of the Electrochemical-Society (ECS)
CY OCT 09-14, 2011
CL Boston, MA
SP Electrochem Soc (ECS), Phys & Analyt Electrochemistry
ID BATTERIES; CATHODE; ION
AB Presented here are data describing the phase behavior and solvation of lithium trifluoromethanesulfonate (LiTf) in ethylene carbonate (EC). Data obtained from differential scanning calorimetry (DSC), Raman spectroscopy, and X-ray diffraction analyses of sample mixtures are correlated to enhance understanding of solvent-salt associations. Thermal analysis by DSC is converted into a binary phase diagram describing the behavior of the solvent-salt interactions. Raman spectroscopy is applied to probe the liquid electrolyte and discover solvent-salt associations in solution. X-ray crystallography reveals that EC-LiTf form a 1:1 aggregated solvate. Raman spectroscopic analysis of mixtures reveals the presence of two aggregated solvates and one contact ion pair.
C1 [Foley, M. P.; Worosz, Christopher J.; Trulove, P. C.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
[Seo, D. M.; Henderson, W. A.] N Carolina State Univ, Dept Chem Biomol Engn, Raleigh, NC 27695 USA.
[Boyle, P. D.] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA.
[De Long, H. C.] Air Force Off Sci Res, Arlington, VA 22203 USA.
RP Foley, MP (reprint author), USN Acad, Dept Chem, Annapolis, MD 21402 USA.
FU U.S. Department of Energy, Office of Basic Energy Sciences, Division of
Materials Sciences and Engineering [DE-SC0002169, DE-SC0001419]
FX The authors wish to express their gratitude to the U.S. Department of
Energy, Office of Basic Energy Sciences, Division of Materials Sciences
and Engineering which fully supported this research under Awards
DE-SC0002169 and DE-SC0001419. We also wish to thank the Air Force
Office of Scientific Research, U.S. Naval Academy and North Carolina
State University for personnel.
NR 10
TC 4
Z9 4
U1 4
U2 8
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-326-1; 978-1-56677-967-8
J9 ECS TRANSACTIONS
PY 2012
VL 41
IS 27
BP 99
EP 105
DI 10.1149/1.3692527
PG 7
WC Electrochemistry
SC Electrochemistry
GA BEJ31
UT WOS:000316864800011
ER
PT S
AU Nagareddy, VK
Goss, JP
Wright, NG
Horsfall, AB
Hernandez, SC
Wheeler, VD
Nyakiti, LO
Myers-Ward, RL
Eddy, CR
Walton, SG
Gaskill, DK
AF Nagareddy, V. K.
Goss, J. P.
Wright, N. G.
Horsfall, A. B.
Hernandez, S. C.
Wheeler, V. D.
Nyakiti, L. O.
Myers-Ward, R. L.
Eddy, C. R., Jr.
Walton, S. G.
Gaskill, D. K.
GP IEEE
TI Oxygen Functionalised Epitaxial Graphene Sensors for Enhanced Polar
Organic Chemical Vapour Detection
SO 2012 IEEE SENSORS PROCEEDINGS
SE IEEE Sensors
LA English
DT Proceedings Paper
CT 11th IEEE Sensors Conference
CY OCT 28-31, 2012
CL Taipei, TAIWAN
SP IEEE, Sensors Council, Sensirion, Natl Chiao Tung Univ, Nanotechnol & Micro Syst Assoc (NMA), Natl Cheng Kung Univ, Tsinghua Univ, Natl Sci Council, Bur Foreign Trade, Ind Technol Res Inst, Dept Informat & Tourism, Meet Taiwan, Clean Energy Technol (Ce Tech), Phison Elect Corp (PHISON), Everlight, Tong Hsing Elect Ind, Ltd, Natl Ctr High-Performance Comp (NCHC), Natl Appl Res Labs, Minist Foreign Affairs, Natl Program Nano Technol (NPNT)
AB Oxygen functionalised epitaxial graphene (OFEG) chemiresistor sensors were fabricated for sensing polar organic analyte vapours in the ambient atmosphere. The electrical characteristics of the sensor showed an increase in resistance to polar protic analytes, whilst the resistance decreased upon exposure to polar aprotic vapours. The OFEG sensors showed a significant increase in response time and an order of magnitude improvement in the recovery time in comparison to non-functionalised epitaxial graphene (NFEG) sensors. A strong correlation between the dipole moment of an analyte and the magnitude of the response was observed, where OFEG sensors showed a large linear increase in the magnitude of response in comparison to a small nonlinear change in resistance for NFEG sensors.
C1 [Nagareddy, V. K.; Goss, J. P.; Wright, N. G.; Horsfall, A. B.] Newcastle Univ, Sch Elect & Elect Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England.
[Hernandez, S. C.; Wheeler, V. D.; Nyakiti, L. O.; Myers-Ward, R. L.; Eddy, C. R., Jr.; Walton, S. G.; Gaskill, D. K.] US Naval Acad, Res Lab, Washington, DC 20375 USA.
RP Nagareddy, VK (reprint author), Newcastle Univ, Sch Elect & Elect Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England.
EM alton.horsfall@newcastle.ac.uk; kurt.gaskill@nrl.navy.mil
RI Hernandez, Sandra/C-6724-2013; Wright, Nick/O-1092-2013; Nagareddy,
Karthik/F-3380-2014
OI Nagareddy, Karthik/0000-0002-8765-3834
FU BAE Systems Marine; Engineering and Physical Sciences Research Council (
EPSRC); UK; U. S Naval Research Laboratory Base Program
FX This work was supported by BAE Systems Marine, the Engineering and
Physical Sciences Research Council ( EPSRC), UK and the U. S Naval
Research Laboratory Base Program.
NR 12
TC 1
Z9 1
U1 0
U2 12
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1930-0395
BN 978-1-4577-1766-6; 978-1-4577-1765-9
J9 IEEE SENSOR
PY 2012
BP 2126
EP 2129
PG 4
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BDY72
UT WOS:000315671100509
ER
PT J
AU Baylog, JG
Wettergren, TA
AF Baylog, John G.
Wettergren, Thomas A.
GP IEEE
TI Robust Modeling of Navigation Error for UUV Mission Planning
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc (MTS), IEEE OES (IEEE/OES)
AB In this paper we present an analytical model for incorporating navigational error into a search performance prediction algorithm through the construction of a corresponding utility function. The search space is partitioned into a set of cells over which a utility function formulation is developed for each. The navigational displacement error is assumed to be driven by a Mixed Ornstein Uhlenbeck stochastic process. The evaluation method is based upon our previous work on utility functions as perturbative forms on Bayesian recursion models for search effectiveness modeling with non-trivial dependencies. This paper presents the development of the cell-based probability recursions for the spatially correlated navigational error. From these, a sequential formulation for utility update is developed.
C1 [Baylog, John G.; Wettergren, Thomas A.] USN, Undersea Warfare Ctr, Newport, RI 02841 USA.
RP Baylog, JG (reprint author), USN, Undersea Warfare Ctr, 1176 Howell St, Newport, RI 02841 USA.
EM john.baylog@navy.mil; t.a.wettergren@ieee.org
NR 10
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8
PY 2012
PG 9
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300178
ER
PT B
AU Clem, TR
Sternlicht, DD
Fernandez, JE
Prater, JL
Holtzapple, R
Gibson, RP
Klose, JP
Marston, TM
AF Clem, Ted R.
Sternlicht, Daniel D.
Fernandez, Jose E.
Prater, James L.
Holtzapple, Richard
Gibson, Robert P.
Klose, John P.
Marston, Timothy M.
GP IEEE
TI Demonstration of Advanced Sensors for Underwater Unexploded Ordnance
(UXO) Detection
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc, IEEE Ocean Engn Soc
AB The need to detect and localize seabed unexploded ordnance (UXO) at formerly used military test ranges and to discriminate UXO from other natural and man-made objects represents significant technology challenges. The latter discrimination capability, often described as clutter rejection, is very important to minimize unnecessary diver inspections during subsequent operations for UXO removal. Current commercial-off-the-shelf sensors have limited capability to detect UXO and reject clutter. In 2012 advanced sensors developed for mine hunting were fielded for UXO site inspection and shown to demonstrate capability to inspect areas for potential proud and subsurface UXO sized objects. Systems employed include the Office of Naval Research Small Synthetic Aperture MineHunter (SSAM) and the REMUS 600 Buried Mine Identification (BMI) System for shallow water, and the Hydronalix SurfSense Micro Unmanned Surface Vessel (Micro-USV) for the surf zone.
C1 [Clem, Ted R.; Sternlicht, Daniel D.; Fernandez, Jose E.; Prater, James L.; Holtzapple, Richard; Gibson, Robert P.; Klose, John P.; Marston, Timothy M.] USN, Ctr Surface Warfare, Panama City Div, Panama City, FL 32407 USA.
RP Clem, TR (reprint author), USN, Ctr Surface Warfare, Panama City Div, 110 Vernon Ave, Panama City, FL 32407 USA.
NR 5
TC 0
Z9 0
U1 0
U2 5
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8; 978-1-4673-0830-4
PY 2012
PG 4
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300343
ER
PT B
AU Condon, A
Veeramony, J
AF Condon, Andrew
Veeramony, Jay
GP IEEE
TI Development and Validation of a Coastal Surge and Inundation Prediction
System
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc, IEEE Ocean Engn Soc
DE Storm surge; Inundation; Hydrodynamic modeling; Delft3D; Forecasting
ID HIGH WIND SPEEDS; STORM-SURGE; MOMENTUM FLUX; REAL-TIME; MODEL;
HURRICANE; DRAG; WAVE; COEFFICIENTS; FORMULATION
AB The development and validation of a coastal storm surge and inundation prediction system for operational use by the United States Navy is detailed. The system consists of the Delft3D-FLOW hydrodynamic model coupled with the Delft3D-WAVE wave model and a graphical user interface, the Delft Dashboard. The coupled system is used to model storm surge and inundation produced by Hurricane Ike along the Gulf of Mexico coast in September 2008. The hydrodynamic model is run in 2D depth averaged mode to develop a "best" simulation. The best simulation is developed after hundreds of test runs and it consists of a blended elevation dataset for use as the model bathymetry and topography, a spatially varying Manning's N coefficient, multiple nests, atmospheric forcing from re-analysis wind and pressure fields with directional land masking, an initial water level of 0.11 m, an updated air - sea drag coefficient, and dynamically coupled flow and wave fields. The simulation results compare very favorably with observed water level. To assess the system in an operational forecast environment, the system's sensitivity to the elevation dataset, bottom roughness, domain resolution, atmospheric forcing, drag coefficient, initial water level, and wave coupling was investigated and found to vary widely depending on the component.
C1 [Condon, Andrew] Amer Soc Engn Educ, Stennis Space Ctr, MS 39529 USA.
[Veeramony, Jay] Naval Res Lab, Div Oceanog, Stennis Space Ctr, MS 39529 USA.
RP Condon, A (reprint author), Amer Soc Engn Educ, Stennis Space Ctr, MS 39529 USA.
NR 36
TC 0
Z9 0
U1 1
U2 8
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8; 978-1-4673-0830-4
PY 2012
PG 8
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300059
ER
PT B
AU Eleuterio, DP
Sandgathe, S
AF Eleuterio, Daniel P.
Sandgathe, Scott
GP IEEE
TI The Earth System Prediction Capability Program
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc, IEEE Ocean Engn Soc
DE Seamless Prediction; Global Air-Ocean Coupled Models; Intraseasonal to
Interannual Forecasts
AB The Earth System Prediction Capability (ESPC) inter-agency program was established in 2010 as a coordinating effort to improve collaboration across the federally sponsored environmental research and operational prediction communities for the development and implementation of improved national physical earth system prediction. Towards these goals, a set of five demonstration projects are under development and researchers are invited to participate in the definition and execution of the projects. The goal of the demonstrations is to provide unifying themes and common diagnostics to develop a common modeling environment, establish community data sets & test cases, assess predictability at sub-seasonal to inter-annual timescales, and begin to develop guidelines for the future transition to operational forecasts.
C1 [Eleuterio, Daniel P.] Off Naval Res, Code 322 875 N Randolph St, Arlington, VA 22203 USA.
[Sandgathe, Scott] Univ Washington, Appl Phys Lab, Seattle, WA 98105 USA.
RP Eleuterio, DP (reprint author), Off Naval Res, Code 322 875 N Randolph St, Arlington, VA 22203 USA.
EM daniel.eleuterio@navy.mil; sandgathe@apl.washington.edu
NR 6
TC 0
Z9 0
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8; 978-1-4673-0830-4
PY 2012
PG 3
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300114
ER
PT B
AU Incze, ML
AF Incze, M. L.
GP IEEE
TI Designing for Autonomy in Unmanned Underwater Vehicles
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc (MTS), IEEE OES (IEEE/OES)
C1 USN, Undersea Warfare Ctr Div, Newport, RI 02841 USA.
RP Incze, ML (reprint author), USN, Undersea Warfare Ctr Div, 1176 Howell St, Newport, RI 02841 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8
PY 2012
PG 9
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300331
ER
PT B
AU Kuhner, JT
Meredith, RW
Taylor, CC
AF Kuhner, Joseph T.
Meredith, Roger W.
Taylor, Casey C.
GP IEEE
TI Automated Contact Calling Visual Aid Using Sequential Mathematical
Processes Using Textural Analysis for Mine-Like Contact Detection
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc (MTS), IEEE OES (IEEE/OES)
AB This paper presents an automated process for finding mine-like contacts by incorporating sequential mathematical processes: textural analysis, polygon discrimination, and dimensional filtering. These processes define a methodology that requires a minimal amount of user input to visually aid the side scan interpreter. The initial focus of this project was to find mine-like objects in high clutter density areas while maintaining a high probability of detection. In order to meet this requirement, a methodology had to be established to combine multiple analytic algorithms. There was also a concerted effort to create a methodology that could be used on a variety of side scan sonar systems. However, in order to discriminate contacts on multiple sonar systems, certain system specifications would have to be incorporated into the process. The key differences between side scan sonar systems necessary for this study are the optimum operating altitude and the along and across track resolutions of the imagery. Since altitude dictates the pixel area encompassed by contacts and resolution determines distortion of the contacts in the imagery, the iterating texture measurement window was built around these two concepts. Implementing a polygon discrimination algorithm became necessary to locate and find the centroid of polygons in the imagery that met textural analysis threshold requirements for a mine-like contact. The application of these methods has shown the potential for an automated process capable of ingesting different types of side scan sonar data with minimal user input.
C1 [Kuhner, Joseph T.; Meredith, Roger W.; Taylor, Casey C.] USN, Mine Warfare Technol Div, Oceanog Off, Stennis Space Ctr, MS 39522 USA.
RP Kuhner, JT (reprint author), USN, Mine Warfare Technol Div, Oceanog Off, Stennis Space Ctr, MS 39522 USA.
EM joseph.kuhner@navy.mil; roger.meredith@navy.mil; casey.c.taylor@navy.mil
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8
PY 2012
PG 5
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300044
ER
PT B
AU Lever, JA
Horn, DC
AF Lever, John A.
Horn, Dawn C.
GP IEEE
TI A Systems Engineering Approach for Performance Surface Computational
Architectures
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc (MTS), IEEE OES (IEEE/OES)
DE Integrated Product Team; acquisition; systems engineering
AB The Naval Meteorology and Oceanography Command (NAVMETOCCOM) produces operational image products referred to as performance surfaces. A performance surface is the projection of numerical values that reflect the performance of a system or phenomenon into a Geographic Coordinate System layer portraying a physical representation of the earth's atmosphere, surface, or ocean. That is, a performance surface is a graphic that indicates optimal performance through visual cues. To date, performance surface algorithms exist for Anti-Submarine Warfare (ASW) and Piracy, and future performance surfaces are anticipated. A characteristic of performance surfaces is their computational complexity, which can be either deterministic or stochastic in nature. The use of stochastic processes drives a significant computational burden based on the sheer volume of individual simulations that must be run and then combined to form a probabilistic prediction. To mitigate the difficulties imposed by large volume stochastic processes, NAVMETOCCOM chartered an Integrated Product Team (IPT) to characterize a suitable computational architecture for existing and future performance surfaces. The IPT was also tasked to document an engineering process by which emergent performance surfaces could implement suitable architectures. This engineering process used tailored DoD acquisition best practices that were agile and easily repeatable for use by future NAVMETOCCOM IPT efforts.
C1 [Lever, John A.; Horn, Dawn C.] USN, Meteorol & Oceanog Command, Stennis Space Ctr, MS 39529 USA.
RP Lever, JA (reprint author), USN, Meteorol & Oceanog Command, Code N6, Stennis Space Ctr, MS 39529 USA.
EM john.a.lever@navy.mil; dawn.c.horn@navy.mil
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8
PY 2012
PG 7
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300016
ER
PT B
AU Lim, R
Malphurs, DE
Lee, KH
Kennedy, JL
Lopes, JL
AF Lim, Raymond
Malphurs, David E.
Lee, Kwang H.
Kennedy, Jermaine L.
Lopes, Joseph L.
GP IEEE
TI Comparisons of SAS Processed Data from Ordnance Replicas over Various
Size Scales: Experiments and Acoustic Models
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc, IEEE Ocean Engn Soc
DE Aspect frequency response; Circular synthetic aperture sonar; Finite
element methods; Synthetic aperture sonar; Target strength
ID TILTED SOLID CYLINDER; BACKSCATTERING ENHANCEMENTS; RAYLEIGH-WAVES;
SCATTERING; WATER
AB Sonar has been the Navy's workhorse for detection and discrimination of underwater objects from clutter through analysis of image phenomena. However, new phenomena need to be identified to accommodate a growing class of unexploded ordnance targets with more varied shapes and sizes, and difficulties increase for buried ordnance because the wave attenuation and inhomogeneity in ocean sediments make detection less predictable and high-resolution imaging more difficult. Even when imaging can be done, important image phenomena (e. g., highlight/shadow details) are lost. Therefore, modeling, data collection, and data processing/analysis has been performed at NSWC PCD to build a target response database that could be exploited both for statistical automated target recognition studies based on existing feature types and for isolation of promising physical phenomena that classifiable features could be extracted from without requiring high image resolution. Several methods to build this database have been pursued, including data collection in full-scale field experiments in the Gulf of Mexico, data collection in NSWC PCD's freshwater pond facility, data collection within a small freshwater tank using scaled targets on scaled glass bead sediments, and data generation through finite element simulations. In this paper, results from each of these methods are presented and compared to assess the tradeoffs inherent in them.
C1 [Lim, Raymond; Malphurs, David E.; Lee, Kwang H.; Kennedy, Jermaine L.; Lopes, Joseph L.] USN, Ctr Surface Warfare, Panama City Div, Panama City, FL 32407 USA.
RP Lim, R (reprint author), USN, Ctr Surface Warfare, Panama City Div, Panama City, FL 32407 USA.
NR 8
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8; 978-1-4673-0830-4
PY 2012
PG 10
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300342
ER
PT J
AU Luznik, L
Flack, KA
Lust, EE
Baxter, DP
AF Luznik, Luksa
Flack, Karen A.
Lust, Ethan E.
Baxter, David P.
GP IEEE
TI Hydrodynamic Performance of a Horizontal Axis Tidal Turbine under Steady
Flow Conditions
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc (MTS), IEEE OES (IEEE/OES)
DE tidal turbines; performance characteristics; tow tank experiments;
uncertainty analysis
ID MARINE CURRENT TURBINES
AB Performance characteristics are presented for a two-bladed horizontal axis tidal turbine, representing a 1/25th scale operational turbine. The tests were conducted in a 116 m long tow tank facility at the United States Naval Academy. The performance characteristics of power and thrust coefficient are measured for the turbine for a range of tip speed ratios. The results of the model test are applicable to full scale due to Re number independence of the rotor blades for the tested conditions. A full uncertainty analysis is performed and major sources of uncertainty are identified. Uncertainty levels are 4% and 1% for power and thrust coefficient respectively, and 3% for the tip speed ratio.
C1 [Luznik, Luksa; Flack, Karen A.; Lust, Ethan E.; Baxter, David P.] USN Acad, Dept Mech Engn, Annapolis, MD 21402 USA.
RP Luznik, L (reprint author), USN Acad, Dept Mech Engn, Annapolis, MD 21402 USA.
EM luznik@usna.edu; flack@usna.edu; lust@usna.edu
NR 14
TC 0
Z9 0
U1 1
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8
PY 2012
PG 4
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300093
ER
PT J
AU McCarren, D
AF McCarren, David
GP IEEE
TI National Unified Operational Prediction Capability Common Model
Architecture
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc (MTS), IEEE OES (IEEE/OES)
DE Global Modeling; numerical model architecture; interoperability;
ensemble; ESMF; model framework
AB NUOPC is a joint effort between NOAA, DOD, and their research partners to improve collaboration and accelerate operational numerical weather prediction. This partnership is focused on leveraging agency resources and existing ensemble systems into a National Unified Ensemble. The multi-model ensemble was implemented in 2011 and brings additional skill to forecasts at ranges of 8 days and beyond. With the exchange of over 70 variables for forecasts out to 16 days with model runs twice a day and fields exchanged on a one degree grid, much coordination is required to meet the operational requirements of the data exchange. Another effort by the NUOPC partners is the creation of a Common Model Architecture for use in the Operational Prediction Centers. An interagency working group developed the original strategy over a series of meetings from 2007 to 2009. Their final report was approved and published in 2009 and established a well-developed plan to implement this strategy across the partners. This effort created agreed to interoperability standards which can be applied to individual model components and allow for relative ease of swapping other components for testing, demonstration and use.
C1 USN, Meteorol & Oceanog Command, Stennis Space Ctr, MS 39529 USA.
RP McCarren, D (reprint author), USN, Meteorol & Oceanog Command, Stennis Space Ctr, MS 39529 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8
PY 2012
PG 3
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300030
ER
PT B
AU Moustahfid, H
Jech, MM
Weise, MJ
Horne, JK
O'Dor, R
Alexander, C
AF Moustahfid, Hassan
Jech, Michael M.
Weise, Michael J.
Horne, John K.
O'Dor, Ron
Alexander, Charles
GP IEEE
TI Advancing "Bio" Sensor Integration with Ocean Observing Systems to
Support Ecosystem Based Approaches
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc, IEEE Ocean Engn Soc
DE "Bio" sensor; Ocean Observing Systems; US IOOS; Ecosystem-Based
Approaches
ID IN-SITU; CLASSIFICATION; MANAGEMENT; PREDATOR; PLANKTON
AB The vision of the US Integrated Ocean Observing System (U. S. IOOS) is to provide information and services to the nation for enhancing our understanding of the ecosystem and climate; sustaining living marine resources; improving public health and safety; reducing impacts of natural hazards and environmental changes; and expanding support for marine commerce and transportation. In the last decade U. S. IOOS has made considerable progress in advancing physical and chemical observing systems, but only modest progress integrating biological observations from disparate data providers, and there remain challenges to fully integrate biological observing systems into U. S. IOOS. Recent technological advances in miniature, low power "bio" sensor can record everything from plankton greater than 20 micrometer with electro-optical technology, to hydroacoustic sensors that can record meso-zooplankton and nekton from mobile autonomous platforms, to satellite linked recorders that can record the movement and behavior of the largest marine predators. This opens up remarkable opportunities for observing the biotic realm at critical spatio-temporal scales that are most relevant to organisms, which have been out of reach until present. "bio" sensor technology is mature and proven to be operational and biological monitoring should be an integrated component of observing systems. Optimally, it should be clearly defined and implemented in close association with physical oceanographers. The integration of biological observing into U. S IOOS will only strengthen the national observing capabilities to respond to the growing needs for ecosystem observation to support ecosystem-based approaches and sustain our living marine resources.
C1 [Moustahfid, Hassan; Alexander, Charles] NOAA, US Integrated Ocean Observing Syst, Silver Spring, MD 20910 USA.
[Jech, Michael M.] NOAA Fisheries, Northeast Fisheries Sci Ctr, Woods Hole, MA 02543 USA.
[Weise, Michael J.] US Navy, Off Naval Res, Arlington, VA USA.
[Horne, John K.] Univ Washington, Sch Fisheries, Seattle, WA 98195 USA.
[O'Dor, Ron] Dalhousie Univ, Dept Biol, Halifax, NS, Canada.
RP Moustahfid, H (reprint author), NOAA, US Integrated Ocean Observing Syst, Silver Spring, MD 20910 USA.
EM Hassan.Moustahfid@noaa.gov; jhorne@uw.edu
NR 32
TC 0
Z9 0
U1 0
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8; 978-1-4673-0830-4
PY 2012
PG 7
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300333
ER
PT B
AU Mullen, L
Cochenour, B
AF Mullen, Linda
Cochenour, Brandon
GP IEEE
TI Communication over Lasers in Ocean Research (COLOR) Bringing Navy
Research to the Classroom
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc (MTS), IEEE OES (IEEE/OES)
DE STEM; laser; communication; scattering; absorption
AB Scientists and engineers in the Electro-Optics and Special Mission Sensors division at NAVAIR have developed a hands-on activity, Communication over Lasers in Ocean Research (COLOR), to bring their Navy research to K-12 classrooms. This activity was created in response to the Navy's interest in increasing the number of US students pursuing careers in Science Technology Engineering and Math (STEM) disciplines. The COLOR activity provides a way for Navy scientists and K-12 educators to excite students about lasers, optics, and how the Navy uses these tools to complete critical missions. The following paper details the various modules of the COLOR activity and how they are used to teach students and faculty about light and how it can be used to see and communicate in the underwater environment.
C1 [Mullen, Linda; Cochenour, Brandon] NAVAIR, EO & Special Mission Sensors Div, Patuxent River, MD USA.
RP Mullen, L (reprint author), NAVAIR, EO & Special Mission Sensors Div, Patuxent River, MD USA.
EM linda.mullen@navy.mil
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8
PY 2012
PG 4
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300110
ER
PT B
AU Perez, P
Jemison, WD
Mullen, L
Laux, A
AF Perez, Paul
Jemison, William D.
Mullen, Linda
Laux, Alan
GP IEEE
TI Techniques to enhance the performance of hybrid lidar-radar ranging
systems
SO 2012 OCEANS
LA English
DT Proceedings Paper
CT MTS/IEEE Oceans Conference
CY OCT 14-19, 2012
CL Virginia Beach, VA
SP IEEE, Marine Technol Soc, IEEE Ocean Engn Soc
DE underwater; optical ranging; scattering
AB Hybrid lidar-radar uses a combination of lidar and radar techniques to enhance underwater detection, ranging, and imaging. In turbid water, the lidar return signal includes a significant amount of backscatter in addition to the object-reflected light. System performance is highly limited by the backscatter which results from volumetric scattering of the transmitted light signal off the particulates existing in the water channel. A new backscatter reduction techniqu based on spatial frequency filtering will be discussed. The spatia filter algorithm leverages radar techniques developed to enhance through the wall imaging (TTWI) performance. Algorithm validation via experimental data is provided.
C1 [Perez, Paul] Clarkson Univ, Dept Phys, Potsdam, NY 13699 USA.
[Jemison, William D.] Clarkson Univ, Dept Elect & Comp Engn, Potsdam, NY 13699 USA.
[Mullen, Linda; Laux, Alan] NAVAIR, EO & Special Mission Sensors Div, Columbia, MD USA.
RP Perez, P (reprint author), Clarkson Univ, Dept Phys, Potsdam, NY 13699 USA.
EM perezpd@clarkson.edu
NR 4
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0829-8; 978-1-4673-0830-4
PY 2012
PG 6
WC Engineering, Multidisciplinary; Telecommunications
SC Engineering; Telecommunications
GA BDW56
UT WOS:000315350300181
ER
PT J
AU Rabinovich, W
AF Rabinovich, William
BE Arnon, S
Barry, JR
Karagiannidis, GK
Schober, R
Uysal, M
TI Optical modulating retro-reflectors
SO ADVANCED OPTICAL WIRELESS COMMUNICATION SYSTEMS
LA English
DT Article; Book Chapter
ID QUANTUM-WELL MODULATOR; 1.55 MU-M; FREE-SPACE; RETROREFLECTOR SYSTEM;
COMMUNICATION; DESIGN; LINKS
C1 USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Rabinovich, W (reprint author), USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
NR 44
TC 6
Z9 6
U1 0
U2 5
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
BN 978-0-521-19787-8
PY 2012
BP 328
EP 350
D2 10.1017/CBO9780511979187
PG 23
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BEA23
UT WOS:000315871700013
ER
PT S
AU Shifler, DA
AF Shifler, David A.
BE Shifler, DA
TI Evaluating Materials and Fuels Using an Atmospheric-Pressure
Low-Velocity Burner Rig
SO HIGH TEMPERATURE CORROSION AND MATERIALS CHEMISTRY 9 - A SYMPOSIUM IN
HONOR OF PROFESSOR ROBERT A. RAPP
SE ECS Transactions
LA English
DT Proceedings Paper
CT Symposium on High Temperature Corrosion and Materials Chemistry 9 in
Honor of Robert A. Rapp at the 220th Meeting of the
Electrochemical-Society (ECS)
CY OCT 09-14, 2011
CL Boston, MA
SP Electrochem Soc (ECS), High Temperature Mat, Corros
ID HOT CORROSION; SODIUM; SULFIDATION; SUPERALLOYS; NICKEL; TESTS
AB In order to meet future Naval performance and safety parameters, it is anticipated that synthetic logistics fuels will be required to meet the current Naval petroleum-based physical, combustion, and chemistry specifications. However, before they are used, these fuels must be certified for use by passing through a series of evaluation tests to ascertain whether their chemical, physical, and combustion properties will have an adverse impact on engines, that herebefore have used specified petroleum,-based fuels.
It has been established that low-velocity, atmospheric-pressure burner rigs, when operated properly, simulate the corrosion and degradation of materials operating in the shipboard gas turbines. To evaluate whether new fuels will cause accelerated corrosion in a gas turbine, the corrosion of coated superalloy samples representative of materials in the hot section of gas turbines are exposed to the combustion gaseous products of the new fuels or fuel blends in the burner rig and compared to that of a standard petroleum-based fuel. Parameter control in all tests is critical if proper evaluation and interpretation is to be achieved. Failure to control the parameters leads to uncertainities that will require more testing or deliver unsupportable, indeterminate conclusions. The paper will discuss cases where proper test parameters lead to determining supportable, repeatable conclusions and corrective actions and where improper test procedures and parameter control may lead to unintended, unsupportable conclusions.
C1 USN, Div Mat, Off Naval Res, Arlington, VA 22203 USA.
RP Shifler, DA (reprint author), USN, Div Mat, Off Naval Res, 875 N Randolph St, Arlington, VA 22203 USA.
NR 45
TC 0
Z9 0
U1 1
U2 5
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-343-8
J9 ECS TRANSACTIONS
PY 2012
VL 41
IS 42
BP 85
EP 102
DI 10.1149/1.4718002
PG 18
WC Electrochemistry; Materials Science, Multidisciplinary
SC Electrochemistry; Materials Science
GA BEB84
UT WOS:000316021500008
ER
PT S
AU Pique, A
AF Pique, A.
BE Prudenziati, M
Hormadaly, J
TI Laser-printed micro- and meso-scale power generating devices
SO PRINTED FILMS: MATERIALS SCIENCE AND APPLICATIONS IN SENSORS,
ELECTRONICS AND PHOTONICS
SE Woodhead Publishing Series in Electronic and Optical Materials
LA English
DT Article; Book Chapter
DE laser direct-write (LDW); laser-induced forward transfer (LIFT);
laser-printed micro-power sources; embedded microbatteries
ID SENSITIZED SOLAR-CELLS; DIRECT-WRITE TECHNIQUES; LI-ION MICROBATTERIES;
THIN-FILMS; ELECTROCHEMICAL CAPACITORS; METAL-DEPOSITION; RUTHENIUM
OXIDE; ELECTRONIC MATERIALS; ABLATION TRANSFER; TIO2 ELECTRODES
AB This chapter describes how laser direct-write (LDW) processes can be applied to the rapid prototyping of micro- and meso-scale power sources. The chapter reviews the use of laser-induced forward transfer (LIFT) to deposit patterns of complex suspensions comprising the functional materials required for printing ultracapacitors, primary and secondary batteries and dye-sensitized solar cells (DSSC). The chapter describes the preparation of embedded microbatteries via LDW and concludes with a discussion on the present and future status of these laser-based digital microfabrication techniques.
C1 USN, Res Lab, Mat Sci & Technol Div, Washington, DC 20375 USA.
RP Pique, A (reprint author), USN, Res Lab, Mat Sci & Technol Div, Code 6364,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM pique@nrl.navy.mil
NR 70
TC 0
Z9 0
U1 2
U2 6
PU WOODHEAD PUBL LTD
PI CAMBRIDGE
PA ABINGTON HALL ABINGTON, CAMBRIDGE CB1 6AH, CAMBS, ENGLAND
SN 2050-1501
BN 978-0-85709-621-0
J9 WOODH PUB SER ELECT
PY 2012
IS 26
BP 526
EP 549
D2 10.1533/9780857096210
PG 24
WC Engineering, Electrical & Electronic; Materials Science, Coatings &
Films; Physics, Applied
SC Engineering; Materials Science; Physics
GA BDX40
UT WOS:000315530300019
ER
PT S
AU Canedy, CL
Kim, CS
Merritt, CD
Bewley, WW
Abell, J
Vurgaftman, I
Meyer, JR
Kim, M
AF Canedy, C. L.
Kim, C. S.
Merritt, C. D.
Bewley, W. W.
Abell, J.
Vurgaftman, I.
Meyer, J. R.
Kim, M.
GP IEEE
TI Improved Interband Cascade Lasers for lambda=3-5.6 mu m
SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY MAY 06-11, 2012
CL San Jose, CA
AB The cw operating temperature of ICLs emitting at 3.9, 4.7 and 5.6 mu m is extended to 107 degrees C, 60 degrees C, and 48 degrees C, respectively. The threshold powers range from several tens to several hundred mW at 25 degrees C.
C1 [Canedy, C. L.; Kim, C. S.; Merritt, C. D.; Bewley, W. W.; Abell, J.; Vurgaftman, I.; Meyer, J. R.] USN, Res Lab, Washington, DC 20375 USA.
RP Canedy, CL (reprint author), USN, Res Lab, Code 5613, Washington, DC 20375 USA.
EM vurgaftman@nrl.navy.mil
NR 2
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-933-6
J9 CONF LASER ELECTR
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BCK05
UT WOS:000310362400079
ER
PT S
AU Flynn, RA
Fleet, E
Kretzer, C
Beadie, G
AF Flynn, R. A.
Fleet, E.
Kretzer, C.
Beadie, G.
GP IEEE
TI Practical Design of a Layered Polymer GRIN Lens
SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY MAY 06-11, 2012
CL San Jose, CA
AB Design of an achromat F/3 singlet lens made of layered polymer GRIN material is presented. Lens outperforms a commercial glass doublet. Optimization requires efficient bounding of refractive index function. A custom material model handles dispersion.
C1 [Flynn, R. A.; Fleet, E.; Beadie, G.] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
[Kretzer, C.] Global Inc, Washington, DC 20375 USA.
RP Flynn, RA (reprint author), USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
EM richard.flynn@nrl.navy.mil
NR 3
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-933-6
J9 CONF LASER ELECTR
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BCK05
UT WOS:000310362401485
ER
PT S
AU Hite, JK
Twigg, ME
Bassim, ND
Mastro, MA
Freitas, JA
Meyer, JR
Vurgaftman, I
O'Connor, S
Condon, NJ
Kub, FJ
Bowman, SR
Eddy, CR
AF Hite, Jennifer K.
Twigg, Mark E.
Bassim, Nabil D.
Mastro, Michael A.
Freitas, Jaime A., Jr.
Meyer, Jerry R.
Vurgaftman, Igor
O'Connor, Shawn
Condon, Nicholas J.
Kub, Francis J.
Bowman, Steven R.
Eddy, Charles R., Jr.
GP IEEE
TI Development of Periodically Oriented Gallium Nitride
SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY MAY 06-11, 2012
CL San Jose, CA
ID 2ND-HARMONIC GENERATION; GAN
AB Methods for growing periodically alternating polarities of GaN on GaN substrates have been developed. The resulting periodically oriented samples can be extended to thick growth, allowing their use in non-linear optics.
C1 [Hite, Jennifer K.; Twigg, Mark E.; Bassim, Nabil D.; Mastro, Michael A.; Freitas, Jaime A., Jr.; Meyer, Jerry R.; Vurgaftman, Igor; O'Connor, Shawn; Condon, Nicholas J.; Kub, Francis J.; Bowman, Steven R.; Eddy, Charles R., Jr.] USN, Res Lab, Washington, DC 20375 USA.
RP Hite, JK (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM jennifer.hite@nrl.navy.mil
RI Hite, Jennifer/L-5637-2015
OI Hite, Jennifer/0000-0002-4090-0826
NR 8
TC 0
Z9 0
U1 0
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-933-6
J9 CONF LASER ELECTR
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BCK05
UT WOS:000310362400471
ER
PT S
AU Nikitin, S
Prokes, S
Qi, H
Glembocki, O
Grun, J
AF Nikitin, Sergei
Prokes, Sharka
Qi, Hua
Glembocki, Orest
Grun, Jacob
GP IEEE
TI Multi-wavelength Surface-Enhanced Raman Scattering from Molecules
Adsorbed on Plasmonic Nanowires
SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY MAY 06-11, 2012
CL San Jose, CA
ID IDENTIFICATION
AB Multi-wavelength Raman scattering from benzene-thiol adsorbed on randomly distributed silver-coated plasmonic nanowires was measured in the visible optical range to probe the density of states of the chemical, changed due to adsorption.
C1 [Nikitin, Sergei] Res Support Instruments Inc, 4325-B Forbes Blvd, Lanham, MD 20706 USA.
[Prokes, Sharka; Glembocki, Orest; Grun, Jacob] US Naval Res Lab, Washington, DC 20375 USA.
[Qi, Hua] ASEE, Washington, DC USA.
RP Nikitin, S (reprint author), Res Support Instruments Inc, 4325-B Forbes Blvd, Lanham, MD 20706 USA.
EM nikitins@researchsupport.com
FU US Naval Research Laboratory, Washington DC
FX This research was supported by the US Naval Research Laboratory,
Washington DC
NR 7
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-933-6
J9 CONF LASER ELECTR
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BCK05
UT WOS:000310362403159
ER
PT S
AU Pruessner, MW
Stievater, TH
Goetz, PG
Rabinovich, WS
Urick, VJ
AF Pruessner, M. W.
Stievater, T. H.
Goetz, P. G.
Rabinovich, W. S.
Urick, V. J.
GP IEEE
TI High-Extinction Linear Cascaded-Microcavity Filters
SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY MAY 06-11, 2012
CL San Jose, CA
AB We design cascaded waveguide microcavities. Using realistic design parameters based on previously demonstrated single-stage devices, we model filters with > 60dB extinction, 100GHz FSR and 1GHz bandwidth. Initial experimental results are presented.
C1 [Pruessner, M. W.; Stievater, T. H.; Goetz, P. G.; Rabinovich, W. S.; Urick, V. J.] USN, Res Lab, Washington, DC 20375 USA.
RP Pruessner, MW (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-933-6
J9 CONF LASER ELECTR
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BCK05
UT WOS:000310362401181
ER
PT S
AU Stievater, TH
Pruessner, MW
Park, D
Holmstrom, SA
McGill, RA
Rabinovich, WS
AF Stievater, T. H.
Pruessner, M. W.
Park, D.
Holmstrom, S. A.
McGill, R. A.
Rabinovich, W. S.
GP IEEE
TI Evanescent Waveguide Absorption Spectroscopy of Trace Gases
SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY MAY 06-11, 2012
CL San Jose, CA
ID CHIP
AB We demonstrate the detection of water vapor adsorbed into a sorbent polymer layer coated onto highly evanescent SiN rib waveguides by measuring the change in absorption as a function of wavelength, polarization, and analyte concentration. (C) 2011 Optical Society of America
C1 [Stievater, T. H.; Pruessner, M. W.; Park, D.; McGill, R. A.; Rabinovich, W. S.] USN, Res Lab, Washington, DC 20375 USA.
[Holmstrom, S. A.] Univ Tulsa, Tulsa, OK 74104 USA.
RP Stievater, TH (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM opticalmems@nrl.navy.mil
FU German Research Foundation (DFG); German Research Council [DFG
SE804/4-1]
FX The authors gratefully acknowledge funding of the Erlangen Graduate
School in Advanced Optical Technologies (SAOT) by the German Research
Foundation (DFG) in the framework of the German excellence initiative.
Additionally we gratefully acknowledge direct funding of the German
Research Council (DFG SE804/4-1) for parts of this work. Furthermore, we
thank Johannes Kiefer, University of Aberdeen, for the fruitful
discussion concerning the LIBS results.
NR 8
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-933-6
J9 CONF LASER ELECTR
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BCK05
UT WOS:000310362402109
ER
PT S
AU Stievater, TH
Park, D
Rabinovich, WS
Pruessner, MW
Kanakaraju, S
Richardson, CJK
Khurgin, JB
AF Stievater, T. H.
Park, D.
Rabinovich, W. S.
Pruessner, M. W.
Kanakaraju, S.
Richardson, C. J. K.
Khurgin, J. B.
GP IEEE
TI Ultra-Low V-pi Suspended Quantum Well Waveguides
SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY MAY 06-11, 2012
CL San Jose, CA
AB We demonstrate V pi L values in the optical L-band in suspended quantum well waveguides between 109 and 199 mV-cm, which result from the strong out-of-plane index contrast that tightly confines the mode to the quantum well core. (c) 2011 Optical Society of America
C1 [Stievater, T. H.; Park, D.; Rabinovich, W. S.; Pruessner, M. W.] Naval Res Lab, Washington, DC 20375 USA.
[Kanakaraju, S.; Richardson, C. J. K.] Lab Phys Sci, College Pk, MD 20740 USA.
[Khurgin, J. B.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
RP Stievater, TH (reprint author), Naval Res Lab, Washington, DC 20375 USA.
EM opticalmems@nrl.navy.mil
RI khurgin, Jacob/A-3278-2010
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-933-6
J9 CONF LASER ELECTR
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BCK05
UT WOS:000310362401177
ER
PT S
AU Schroeder, CB
Helle, MH
AF Schroeder, Carl B.
Helle, Michael H.
BE Zgadzaj, R
Gaul, E
Downer, MC
TI Summary Report of Working Group 1: Laser-Plasma Accelerators
SO ADVANCED ACCELERATOR CONCEPTS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 15th Workshop on Advanced Accelerator Concepts (AAC)
CY JUN 10-15, 2012
CL Univ Texas, Austin Campus, Austin, TX
SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz
HO Univ Texas, Austin Campus
DE laser plasma electron acceleration
AB A summary is given of the presentations and discussion in the Laser-Plasma Accelerators Working Group at the 2012 Advanced Accelerator Concepts Workshop. The status, future directions, and outlook of research in laser-plasma accelerators is presented.
C1 [Schroeder, Carl B.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
[Helle, Michael H.] Naval Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Schroeder, CB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
OI Schroeder, Carl/0000-0002-9610-0166
FU U.S. Department of Energy, Office of Science, Office of High Energy
Physics.
FX We would like to gratefully acknowledge the many contributions of the
participants of Working Group 1: Laser- Plasma Accelerators, and we
would like to express our appreciation to the Workshop organizers.
Support was provided by the U.S. Department of Energy, Office of
Science, Office of High Energy Physics.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-1125-8
J9 AIP CONF PROC
PY 2012
VL 1507
BP 199
EP 203
DI 10.1063/1.4773694
PG 5
WC Physics, Applied; Physics, Particles & Fields
SC Physics
GA BDV13
UT WOS:000315058700018
ER
PT S
AU Piot, P
Brau, CA
Gabella, WE
Choi, BK
Jarvis, JD
Lewellen, JW
Mendenhall, MH
Mihalcea, D
AF Piot, P.
Brau, C. A.
Gabella, W. E.
Choi, B. K.
Jarvis, J. D.
Lewellen, J. W.
Mendenhall, M. H.
Mihalcea, D.
BE Zgadzaj, R
Gaul, E
Downer, MC
TI R&D toward a Compact High-Brilliance X-ray Source based on Channeling
Radiation
SO ADVANCED ACCELERATOR CONCEPTS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 15th Workshop on Advanced Accelerator Concepts (AAC)
CY JUN 10-15, 2012
CL Univ Texas, Austin Campus, Austin, TX
SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz
HO Univ Texas, Austin Campus
DE beam dynamics; electron beams; X-rays
ID CHARGED-PARTICLES; NANOTUBES; EMISSION; CRYSTAL; DIAMOND
AB X-rays have been valuable to a large number of fields including Science, Medicine, and Security. Yet, the availability of a compact high-spectral brilliance X-ray sources is limited. A technique to produce X-rays with spectral brilliance B similar to 10(12) photons.(mm-mrd)(-2).(0.1% BW)(-1).s(-1) is discussed. The method is based on the generation and acceleration of a low-emittance field-emitted electron bunches. The bunches are then focused on a diamond crystal thereby producing channeling radiation. In this paper, after presenting the overarching concept, we discuss the generation, acceleration and transport of the low-emittance bunches with parameters consistent with the production of high-brilliance X-rays through channeling radiation. We especially consider the example of the Advanced Superconducting Test Accelerator (ASTA) currently in construction at Fermilab where a proof-of-principle experiment is in preparation.
C1 [Piot, P.; Mihalcea, D.] Northern Illinois Univ, Northern Illinois Ctr Accelerator & Detector Dev, De Kalb, IL 60115 USA.
[Piot, P.] Fermilab Natl Accelerator Lab, Accelerator Phys Ctr, Batavia, IL 60510 USA.
[Brau, C. A.; Gabella, W. E.; Jarvis, J. D.; Mendenhall, M. H.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
[Choi, B. K.] Vanderbilt Univ, Dept Elect Engn & Comp Sci, Nashville, TN 37235 USA.
[Lewellen, J. W.] Naval Postgraduate Sch, Phys Dept Combat Syst, Monterey, CA 93943 USA.
RP Piot, P (reprint author), Northern Illinois Univ, Northern Illinois Ctr Accelerator & Detector Dev, De Kalb, IL 60115 USA.
OI Choi, Bo K./0000-0002-4984-5958
FU DARPA with Vanderbilt University [AXIS N66001-11-1-4196]; DARPA with
Northern Illinois University [AXIS N66001-11-1-4196]; LLC with U.S.
Department of Energy [DE-AC02-07CH11359]
FX This work was supported by the DARPA Axis program under contract AXIS
N66001-11-1-4196 with Vanderbilt University and Northern Illinois
University. The work of P.P. is partially supported by the Fermi
Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the
U.S. Department of Energy. We are thankful to R. A. Carrigan, Jr. for
useful discussions on channeling radiation and to M. Church and V.
Shiltsev for their support.
NR 32
TC 2
Z9 2
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-1125-8
J9 AIP CONF PROC
PY 2012
VL 1507
BP 734
EP 739
DI 10.1063/1.4773789
PG 6
WC Physics, Applied; Physics, Particles & Fields
SC Physics
GA BDV13
UT WOS:000315058700113
ER
PT S
AU Montgomery, EJ
Pan, ZG
Riddick, BC
O'Shea, PG
Feldman, DW
Jensen, KL
Ives, RL
Falce, LR
AF Montgomery, Eric J.
Pan, Zhigang
Riddick, Blake C.
O'Shea, Patrick G.
Feldman, Donald W.
Jensen, Kevin L.
Ives, R. Lawrence
Falce, Louis R.
BE Zgadzaj, R
Gaul, E
Downer, MC
TI Enhanced Lifetime Hybrid-Diffuser Cesium Reservoir Photocathode
SO ADVANCED ACCELERATOR CONCEPTS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 15th Workshop on Advanced Accelerator Concepts (AAC)
CY JUN 10-15, 2012
CL Univ Texas, Austin Campus, Austin, TX
SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz
HO Univ Texas, Austin Campus
DE Controlled porosity reservoir photocathode; dispenser; sintered tungsten
wire diffusion barrier; cesium chromate; quantum efficiency; lifetime
AB A novel self-healing hybrid-diffuser cesium reservoir photocathode is demonstrated. The model-driven design optimizes operating temperature to match diffusion and evaporation rates and maximize quantum efficiency of the cesiated tungsten surface. A sintered-wire tungsten emitter promotes surface uniformity. Cesium loss is less than 0.023 mu g/cm(2)/hr at 125 degrees C, and conservatively extrapolated reservoir lifetime exceeds 30,000 hours. Contamination robustness to a direct atmospheric leak with room-temperature contamination by over 200 Langmuirs of oxidizing gases is excellent, with 90% of maximum QE repeatedly restored via in situ self-healing recesiation under gentle 90 degrees C heating.
C1 [Montgomery, Eric J.; Pan, Zhigang; Riddick, Blake C.; O'Shea, Patrick G.; Feldman, Donald W.] U Maryland, Inst Res Elect & Appl Phys, Bldg 223, College Pk, MD 20742 USA.
[Jensen, Kevin L.] Naval Res Lab, Washington, DC 20375 USA.
[Ives, R. Lawrence; Falce, Louis R.] Calabazas Creek Res, San Mateo, CA 94404 USA.
RP Montgomery, EJ (reprint author), U Maryland, Inst Res Elect & Appl Phys, Bldg 223, College Pk, MD 20742 USA.
OI Riddick, Blake/0000-0003-4646-3329
FU Department of Energy [11051285]; Office of Naval Research
[N000140911190]
FX We acknowledge funding from the Department of Energy ( grant 11051285)
and from the Office of Naval Research ( grant N000140911190). We thank
D. Marsden for cathode design assistance and mechanical drawings, and S.
Khan, A. Day, and S. Eustice for helpful discussions.
NR 8
TC 1
Z9 1
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-1125-8
J9 AIP CONF PROC
PY 2012
VL 1507
BP 933
EP 938
DI 10.1063/1.4788991
PG 6
WC Physics, Applied; Physics, Particles & Fields
SC Physics
GA BDV13
UT WOS:000315058700147
ER
PT S
AU Lee, JS
Ainsworth, TL
Wang, YT
AF Lee, Jong-Sen
Ainsworth, Thomas L.
Wang, Yanting
GP IEEE
TI ON POLARIMETRIC SAR SPECKLE FILTERING
SO 2012 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 22-27, 2012
CL Munich, GERMANY
SP IEEE, IEEE Geosci & Remote Sensing Soc, DLR, ESA
DE Polarimetric SAR; speckle reduction
ID MODEL
AB The advancement of SAR technology with high resolution and quad-polarization data demands better and efficient speckle filtering algorithms. In principle, filtering should be applied to distributed media only. Strong pointed targets should be kept unfiltered. In this paper, we will review some of the recently published PolSAR speckle filtering algorithms, and discuss several important issues that affect the speckle filtering results.
C1 [Lee, Jong-Sen; Ainsworth, Thomas L.; Wang, Yanting] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
RP Lee, JS (reprint author), USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
EM jong_sen_lee@yahoo.com
NR 9
TC 1
Z9 3
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4673-1159-5
J9 INT GEOSCI REMOTE SE
PY 2012
BP 111
EP 114
DI 10.1109/IGARSS.2012.6351624
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BDG99
UT WOS:000313189400029
ER
PT S
AU Arnone, R
Fargion, G
Wang, MH
Martinolich, P
Davis, C
Trees, C
Ladner, S
Lawson, A
Zibordi, G
Lee, ZP
Ondrusek, M
Ahmed, S
AF Arnone, Robert
Fargion, Giulietta
Wang, Menghua
Martinolich, Paul
Davis, Curt
Trees, Charles
Ladner, Sherwin
Lawson, Adam
Zibordi, Giuseppe
Lee, Zhong Ping
Ondrusek, Michael
Ahmed, Samuel
GP IEEE
TI OCEAN COLOR PRODUCTS FROM VISIBLE INFARED IMAGER RADIOMETER SUITE
(VIIRS)
SO 2012 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 22-27, 2012
CL Munich, GERMANY
SP IEEE, IEEE Geosci & Remote Sensing Soc, DLR, ESA
ID ALGORITHM
AB The Ocean Color CAL/VAL team is evaluating the VIIRS bio-optical products for real-time operations. VIIRS ocean data are being processed using standard government algorithms, and channel calibration and product validation evaluation activities are ongoing. A network of 27 global "Golden Regions" has been established to evaluate and validate bio-optical products. Satellite inter-comparison for data consistency with current ocean color products, and real time vicarious adjustment calculation are performed using in situ water leaving radiance propagated to Top of Atmosphere in coastal and open ocean regions. In addition, routine matchups with VIIRS and MODIS-Aqua are done with in situ data collection from ships and real time coastal AERONET-OC sites. The above activities, product evaluation and tracking of channel stability, are being contributed to the JPSS Team to evaluate the overall mission, including calibration and inter-satellite product consistency. Initial NPP VIIRS ocean bio-optical products are demonstrated with other ocean color satellites.
C1 [Arnone, Robert; Ladner, Sherwin; Lawson, Adam] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Fargion, Giulietta] San Diego State Univ, San Diego, CA 2 USA.
[Wang, Menghua; Ondrusek, Michael] NOAA NESDIS, STAR, MD USA.
[Fargion, Giulietta; Martinolich, Paul] QinetiQ Corp, Stennis Space Ctr, Waltham, MA USA.
[Davis, Curt] Oregon State Univ, Corvallis, OR USA.
[Trees, Charles] NATO Undersea Res Ctr, La Spezia, Italy.
[Zibordi, Giuseppe] Joint Res Ctr, Ispra, Italy.
[Lee, Zhong Ping] Univ Massachusetts, Boston, MA USA.
[Ahmed, Samuel] CUNY City Coll, New York, NY USA.
RP Arnone, R (reprint author), USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RI Ondrusek, Michael/F-5617-2010; Wang, Menghua/F-5631-2010
OI Ondrusek, Michael/0000-0002-5311-9094; Wang, Menghua/0000-0001-7019-3125
NR 12
TC 4
Z9 4
U1 0
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4673-1159-5
J9 INT GEOSCI REMOTE SE
PY 2012
BP 287
EP 290
DI 10.1109/IGARSS.2012.6351581
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BDG99
UT WOS:000313189400071
ER
PT S
AU Moses, WJ
Philpot, WD
AF Moses, Wesley J.
Philpot, William D.
GP IEEE
TI EVALUATION OF ATMOSPHERIC CORRECTION USING PSEUDO-INVARIANT FEATURES
FROM BI-TEMPORAL HYPERSPECTRAL IMAGES
SO 2012 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 22-27, 2012
CL Munich, GERMANY
SP IEEE, IEEE Geosci & Remote Sensing Soc, DLR, ESA
DE Atmospheric correction; hyperspectral; Pseudo-Invariant Features (PIFs);
MODTRAN; 6S; FLAASH; TAFKAA_6S; Bidirectional Reflectance Distribution
Function (BRDF); anisotropy index (ANIX)
ID NORMALIZATION; REFLECTANCE
AB Atmospheric correction of hyperspectral image data is frequently a requirement for using remote sensing to understand and quantify various phenomena that take place on the Earth. This is particularly true when the analysis requires the use of spectral reflectance. Although sophisticated models for atmospheric correction exist, evaluating the performance of these models is non-trivial. In this study, two atmospheric correction programs, FLAASH (based on MODTRAN 4), and TAFKAA_6S (based on 6S), were applied to a pair of images of the same area but collected six weeks apart. The results of the two atmospheric correction procedures are analyzed based on the expected stability of pseudo-invariant features (PIFs). Although both procedures performed rather well in terms of removing atmospheric absorption features in the infrared region, the analysis identified some anomalous behaviors as well, the most important of which appears to be related to the bidirectional reflectance distribution of the forest pixels selected as PIFs.
C1 [Moses, Wesley J.] USN, Res Lab, Natl Res Council, Washington, DC 20375 USA.
[Philpot, William D.] US Navy, Res Lab, Amer Soc Engn Educ, Washington, DC USA.
RP Moses, WJ (reprint author), USN, Res Lab, Natl Res Council, Washington, DC 20375 USA.
EM wesley.moses.ctr.in@narl.navy.mil; philpot@cornell.edu
OI Moses, Wesley/0000-0003-3551-6093; Philpot, William/0000-0002-5283-4774
NR 14
TC 0
Z9 0
U1 0
U2 5
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4673-1159-5
J9 INT GEOSCI REMOTE SE
PY 2012
BP 366
EP 369
DI 10.1109/IGARSS.2012.6351562
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BDG99
UT WOS:000313189400091
ER
PT S
AU Savelyev, IB
Maxeiner, E
AF Savelyev, Ivan B.
Maxeiner, Eric
GP IEEE
TI LABORATORY MEASUREMENTS OF WAVE-INDUCED TURBULENCE USING THERMAL MARKING
VELOCIMETRY
SO 2012 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 22-27, 2012
CL Munich, GERMANY
SP IEEE, IEEE Geosci & Remote Sensing Soc, DLR, ESA
DE Infrared imaging; Laser velocimetry; Sea surface; Surface waves
ID SURFACE-WAVE
AB Some theoretical considerations suggest an existence of wave-turbulence energy flux without wave breaking, but scarce empirical results struggle to establish the existence of such process. This study utilizes infrared imaging to investigate the effect of wave motion on near-surface turbulence. An active thermography technique called Thermal Marking Velocimetry (TMV) technique was used in a laboratory wave tank. TMV consisted a CO2 10W laser and rotating mirror to create thermal markers on the water surface, and mid-wave infrared camera to trace their motion. The results confirm the turbulence production due to wave motion. The turbulent kinetic energy was found to be a function of time, wave steepness, wave phase, and initial turbulent conditions. Additionally, turbulent motion near the surface was found to be horizontally anisotropic due to the formation of near-surface eddies, elongated in the direction of wave propagation.
C1 [Savelyev, Ivan B.; Maxeiner, Eric] USN, Res Lab, Washington, DC 20375 USA.
RP Savelyev, IB (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 7
TC 0
Z9 0
U1 1
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4673-1159-5
J9 INT GEOSCI REMOTE SE
PY 2012
BP 1081
EP 1083
DI 10.1109/IGARSS.2012.6351361
PG 3
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BDG99
UT WOS:000313189401074
ER
PT S
AU Lee, JS
Ainsworth, TL
Wang, YT
AF Lee, Jong-Sen
Ainsworth, Thomas L.
Wang, Yanting
GP IEEE
TI GENERALIZED POLARIMETRIC MODEL-BASED DECOMPOSITIONS USING EXTENDED
INCOHERENT SCATTERING MODELS
SO 2012 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 22-27, 2012
CL Munich, GERMANY
SP IEEE, IEEE Geosci & Remote Sensing Soc (GRSS), DLR, ESA
DE Polarimetric SAR; scattering modeling; target decompositions
AB The Freeman and Durden decomposition as original developed is based on three scattering models for volume, surface and double bounce. It is known that the decomposition produces negative scattering powers for a large number of pixels. This implies that the scattering models are inconsistent with the data. In this paper, we investigate the negative power problem and propose two algorithms to mitigate it. To achieve this, alternative scattering models have been adopted, and new families of incoherent scattering models are developed. The effectiveness of these approaches is compared using L-band E-SAR polarimetric data. It will be shown that the negative power problem can be reduced to an insignificant level.
C1 [Lee, Jong-Sen; Ainsworth, Thomas L.; Wang, Yanting] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
RP Lee, JS (reprint author), USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
EM jong_sen_lee@yahoo.com
NR 6
TC 5
Z9 5
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4673-1159-5
J9 INT GEOSCI REMOTE SE
PY 2012
BP 1421
EP 1424
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BDG99
UT WOS:000313189401158
ER
PT S
AU Hwang, PA
Anguelova, MD
Burrage, DM
Wang, DW
Wesson, JC
AF Hwang, Paul A.
Anguelova, Magdalena D.
Burrage, Derek M.
Wang, David W.
Wesson, Joel C.
GP IEEE
TI EFFECTS OF FOAM AND WIND WAVES ON MICROWAVE OCEAN EMISSION
SO 2012 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 22-27, 2012
CL Munich, GERMANY
SP IEEE, IEEE Geosci & Remote Sensing Soc, DLR, ESA
C1 [Hwang, Paul A.; Anguelova, Magdalena D.] USN, Remote Sensing Div, Res Lab, Washington, DC USA.
RP Hwang, PA (reprint author), USN, Remote Sensing Div, Res Lab, Washington, DC USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4673-1159-5
J9 INT GEOSCI REMOTE SE
PY 2012
BP 2591
EP 2594
DI 10.1109/IGARSS.2012.6350949
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BDG99
UT WOS:000313189402191
ER
PT S
AU Wang, YT
Ainsworth, TL
Lee, JS
AF Wang, Yanting
Ainsworth, Thomas L.
Lee, Jong-Sen
GP IEEE
TI A PHYSICAL-BASED UNSUPERVISED CLASSIFICATION AND STATISTICAL
UNCERTAINTIES WITH APPLICATION TO POLSAR IMAGERY
SO 2012 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 22-27, 2012
CL Munich, GERMANY
SP IEEE, IEEE Geosci & Remote Sensing Soc, DLR, ESA
DE Polarimetric Synthetic Aperture Radar; Target Classification; Wishart
Distribution; Likelihood Test
ID MULTIFREQUENCY; SEGMENTATION
AB A feature space for scatterer characterization is constructed of the geophysical parameters of scatterers on size, shape, and orientation. Dense divisions are defined to discriminate target classes of possibly subtle distinction. The statistical similarity and uncertainty of overlapping cluster pairs are evaluated with Wishart based likelihood ratio and at a desired level of false classification the dense set of clusters is hierarchically pruned. Wishart based classification is then applied to the whole imagery, accomplishing a physical-based unsupervised classification algorithm. The algorithm is illustrated using an AIRSAR dataset of San Francisco to evaluate its capability in characterizing complex terrains. As an optional step, the K-Means or Expectation-Maximization iteration is performed to further adapt the cluster centers.
C1 [Wang, Yanting; Ainsworth, Thomas L.] USN, Res Lab, Washington, DC 20375 USA.
RP Wang, YT (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 8
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4673-1159-5
J9 INT GEOSCI REMOTE SE
PY 2012
BP 3150
EP 3153
DI 10.1109/IGARSS.2012.6350757
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BDG99
UT WOS:000313189403073
ER
PT S
AU Kruse, FA
Clasen, CC
Kim, AM
Carlisle, SC
AF Kruse, Fred A.
Clasen, Chris C.
Kim, Angela M.
Carlisle, Sarah C.
GP IEEE
TI EFFECTS OF SPATIAL AND SPECTRAL RESOLUTION ON REMOTE SENSING FOR
DISASTER RESPONSE
SO 2012 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 22-27, 2012
CL Munich, GERMANY
SP IEEE, IEEE Geosci & Remote Sensing Soc, DLR, ESA
DE Spatial and spectral resolution; multispectral; hyperspectral; spectral
mixture analysis; remote sensing; disaster response
ID IMAGING SPECTROMETER DATA
AB Visible and Near-Infrared (VNIR) Multispectral and hyperspectral data are compared for their potential to assist with disaster response and recovery via detailed mapping of the distribution of specific surface materials. Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) data at two spatial resolutions are used to assess the effects of spatial resolution on material mapping capabilities. AVIRIS data are also compared to WorldView-2 (WV-2) 8-band multispectral data with similar spatial resolution to determine the effects of spectral resolution. Initial results illustrate that for urban mapping (buildings, roads, other infrastructure), that high spatial resolution is more critical than high spectral resolution. Decreasing spatial or spectral resolution, however, each increases mapping error.
C1 [Kruse, Fred A.; Kim, Angela M.] USN, Postgrad Sch, Dept Phys, Monterey, CA 93943 USA.
RP Kruse, FA (reprint author), USN, Postgrad Sch, Dept Phys, Monterey, CA 93943 USA.
NR 15
TC 0
Z9 0
U1 1
U2 5
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4673-1159-5
J9 INT GEOSCI REMOTE SE
PY 2012
BP 7086
EP 7089
DI 10.1109/IGARSS.2012.6352030
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BDG99
UT WOS:000313189407008
ER
PT B
AU Zabecki, DT
AF Zabecki, David T.
BE Hoffenaar, J
Kruger, D
TI BLUEPRINTS FOR BATTLE Planning for War in Central Europe, 1948-1968
Foreword
SO BLUEPRINTS FOR BATTLE: PLANNING FOR WAR IN CENTRAL EUROPE, 1948-1968
SE Foreign Military Studies
LA English
DT Editorial Material; Book Chapter
C1 [Zabecki, David T.] USN Acad, Annapolis, MD 21402 USA.
[Zabecki, David T.] Univ Birmingham, War Studies Programme, Birmingham B15 2TT, W Midlands, England.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU UNIV PRESS KENTUCKY
PI LEXINGTON
PA 102 LAFFERTY HALL, UNIVERSITY OF KENTUCKY, LEXINGTON, KY 40506 USA
BN 978-0-8131-3652-3
J9 FOREIGN MIL STUD
PY 2012
BP VII
EP X
PG 4
WC History
SC History
GA BDG07
UT WOS:000313069200001
ER
PT S
AU Calder, AC
Krueger, BK
Jackson, AP
Townsley, DM
Brown, EF
Timmes, FX
AF Calder, A. C.
Krueger, B. K.
Jackson, A. P.
Townsley, D. M.
Brown, E. F.
Timmes, F. X.
BE Stocks, GM
Troparevsky, MC
TI On Simulating Type Ia Supernovae
SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011)
SE Journal of Physics Conference Series
LA English
DT Proceedings Paper
CT 23rd IUPAP C20 Conference on Computational Physics (CCP)
CY OCT 30-NOV 03, 2011
CL Gatlinburg, TN
SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc
ID EVALUATING SYSTEMATIC DEPENDENCIES; FLUID DYNAMICAL SIMULATIONS;
CHANDRASEKHAR-MASS MODELS; SUBGRID SCALE-MODEL; WHITE-DWARF; LIGHT
CURVES; CARBON IGNITION; FRONT PROPAGATION; EXPLOSION MODELS; NUCLEAR
FLAMES
AB Type Ia supernovae are bright stellar explosions distinguished by standardizable light curves that allow for their use as distance indicators for cosmological studies. Despite their highly successful use in this capacity, the progenitors of these events are incompletely understood. We describe simulating type la supernovae in the paradigm of a thermonuclear runaway occurring in a massive white dwarf star. We describe the multi-scale physical processes that realistic models must incorporate and the numerical models for these that we employ. In particular, we describe a flame-capturing scheme that addresses the problem of turbulent thermonuclear combustion on unresolved scales. We present the results of our study of the systematics of type la supernovae including trends in brightness following from properties of the host galaxy that agree with observations. We also present performance results from simulations on leadership-class architectures.
C1 [Calder, A. C.; Krueger, B. K.; Jackson, A. P.] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
[Calder, A. C.] SUNY Stony Brook, New York Ctr Computat Sci, Stony Brook, NY 11794 USA.
[Jackson, A. P.] Naval Res Lab, Lab Computat Phys Fluid Dynam, Washington, DC 20375 USA.
[Townsley, D. M.] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA.
[Brown, E. F.] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
[Brown, E. F.; Timmes, F. X.] Joint Inst Nucl Astrophys, Notre Dame, IN 46556 USA.
[Timmes, F. X.] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.
RP Calder, AC (reprint author), SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
EM acalder@mail.astro.sunysb.edu
OI Brown, Edward/0000-0003-3806-5339
FU Department of Energy [DE-FG02-07ER41516, DE-FG02-08ER41570,
DE-FG02-08ER41565, DE-FG028 7ER40317]; NASA [NNX09AD19G]; Kavli
Institute [PHY055 1164]; ASC/Alliances Center for Astrophysical
Thermonuclear Flashes at the University of Chicago; U.S. Department of
Energy, Office of Nuclear Physics [DE-AC02-06CH11357]; U.S. Department
of Energy [DEA C02-98CH10886]
FX This work was supported by the Department of Energy through grants
DE-FG02-07ER41516, DE-FG02-08ER41570, and DE-FG02-08ER41565, and by NASA
through grant NNX09AD19G. ACC also acknowledges support from the
Department of Energy under grant DE-FG028 7ER40317. DMT received support
from the Bart J. Bok fellowship at the University of Arizona for part of
this work. The authors acknowledge the hospitality of the Kavli
Institute PHY055 1164, during the programs "Accretion and Explosion: the
Astrophysics of Degenerate Stars" and "Stellar Death and Supernovae.
"The software used in this work was in part developed by the
DOE-supported ASC/Alliances Center for Astrophysical Thermonuclear
Flashes at the University of Chicago. This work was also supported in
part by the U.S. Department of Energy, Office of Nuclear Physics, under
contract DE-AC02-06CH11357 and utilized resources at the New York Center
for Computational Sciences at Stony Brook University/Brookhaven National
Laboratory which is supported by the U.S. Department of Energy under
Contract No. DEA C02-98CH10886 and by the State of New York. Finally,
the authors acknowledge and thank the organizers and committees of the
Conference on Computational Physics held October 30 November 3, 2011 in
Gatlinburg, TN for putting together adelightful and
informativeconference.
NR 68
TC 4
Z9 4
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 1742-6588
J9 J PHYS CONF SER
PY 2012
VL 402
AR 012023
DI 10.1088/1742-6596/402/1/012023
PG 13
WC Physics, Multidisciplinary; Physics, Mathematical
SC Physics
GA BDS66
UT WOS:000314709800022
ER
PT J
AU Yu, MC
AF Yu, Maochun
BE Graff, DA
Higham, R
TI The Taiping Rebellion: A Military Assessment of Revolution and
Counterrevolution
SO MILITARY HISTORY OF CHINA
LA English
DT Article; Book Chapter
C1 USN Acad, Annapolis, MD 21402 USA.
RP Yu, MC (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 10
TC 0
Z9 0
U1 0
U2 1
PU UNIV PRESS KENTUCKY
PI LEXINGTON
PA 102 LAFFERTY HALL, UNIVERSITY OF KENTUCKY, LEXINGTON, KY 40506 USA
BN 978-0-8131-3638-7
PY 2012
BP 135
EP 151
PG 17
WC History
SC History
GA BDM17
UT WOS:000313788200009
ER
PT S
AU Currie, M
Dianat, P
Persano, A
Cola, A
Martucci, C
Quaranta, F
Nabet, B
AF Currie, Marc
Dianat, Pouya
Persano, Anna
Cola, Adriano
Martucci, Concetta
Quaranta, Fabio
Nabet, Bahram
GP IEEE
TI High-Speed High-Responsivity Low Temperature Grown GaAs Detector
SO 2012 IEEE PHOTONICS CONFERENCE (IPC)
SE IEEE Photonics Conference
LA English
DT Proceedings Paper
CT 25th IEEE Photonics Conference (IPC)
CY SEP 23-27, 2012
CL Burlingame, CA
SP IEEE, Kotura, Rockley Grp, Intel, Cisco, Oracle Labs, Corning, Google, Luxtera, Fiber Chip, Rambus, Analog Devices, PMC, Sinoora, Soitec, Photon Design, Nat Photon, Commun Technol Roadmap, Simgui
C1 [Currie, Marc; Nabet, Bahram] USN, Div Opt Sci, Res Lab, Washington, DC 20375 USA.
[Dianat, Pouya] Drexel Univ, ECE Dept, Philadelphia, PA 19104 USA.
[Persano, Anna; Cola, Adriano; Martucci, Concetta; Quaranta, Fabio] IMM Inst Consiglio Nazl Ric CNR, I-173100 Lecce, Italy.
RP Currie, M (reprint author), USN, Div Opt Sci, Res Lab, Washington, DC 20375 USA.
RI Quaranta, Fabio/C-7417-2013; Cola, Adriano/G-2379-2010;
OI PERSANO, ANNA/0000-0002-4239-4074
FU NSF Award [ECCS- 0702716]; Office of Naval Research; ASEE- ONR Summer
Faculty Research
FX This work was partially supported by NSF Award No. ECCS- 0702716, the
Office of Naval Research, and an ASEE- ONR Summer Faculty Research
Fellowship.
NR 4
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2374-0140
BN 978-1-4577-0733-9
J9 IEEE PHOTON CONF
PY 2012
BP 312
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BDD75
UT WOS:000312865000158
ER
PT S
AU Weiblen, RJ
Florea, C
Docherty, A
Menyuk, CR
Shaw, B
Sanghera, J
Busse, L
Aggarwal, I
AF Weiblen, R. Joseph
Florea, Catalin
Docherty, Andrew
Menyuk, Curtis. R.
Shaw, Brandon
Sanghera, Jasbinder
Busse, Lynda
Aggarwal, Ishwar
GP IEEE
TI Optimizing Motheye Antireflective Structures for Maximum Coupling
Through As2S3 Optical Fibers
SO 2012 IEEE PHOTONICS CONFERENCE (IPC)
SE IEEE Photonics Conference
LA English
DT Proceedings Paper
CT 25th IEEE Photonics Conference (IPC)
CY SEP 23-27, 2012
CL Burlingame, CA
SP IEEE, Kotura, Rockley Grp, Intel, Cisco, Oracle Labs, Corning, Google, Luxtera, Fiber Chip, Rambus, Analog Devices, PMC, Sinoora, Soitec, Photon Design, Nat Photon, Commun Technol Roadmap, Simgui
AB We study theoretically the transmissivity of As2S3 chalcogenide optical fibers with motheye anti-reflective nanostructures. We show that it is possible to design structures giving greater than 99% transmission from 2-5 mu m.
C1 [Weiblen, R. Joseph; Docherty, Andrew; Menyuk, Curtis. R.] Univ Maryland Baltimore Cty, Baltimore, MD 21250 USA.
[Florea, Catalin] Sotera Def Solut, Mclean, VA 22102 USA.
[Busse, Lynda; Aggarwal, Ishwar] Naval Res Lab, Washington, DC 20375 USA.
[Sanghera, Jasbinder] Sotera Def Solut, Crofton, MD 21114 USA.
RP Weiblen, RJ (reprint author), Univ Maryland Baltimore Cty, Baltimore, MD 21250 USA.
EM ro2@umbc.edu
RI Weiblen, Rudi/H-7003-2014
OI Weiblen, Rudi/0000-0002-1737-9817
NR 4
TC 1
Z9 1
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2374-0140
BN 978-1-4577-0733-9
J9 IEEE PHOTON CONF
PY 2012
BP 824
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BDD75
UT WOS:000312865000407
ER
PT S
AU Li, Y
Woodward, RH
Srimathi, IR
Pung, AJ
Poutous, MK
Johnson, EG
Shori, RK
AF Li, Yuan
Woodward, Ryan H.
Srimathi, Indumathi Raghu
Pung, Aaron J.
Poutous, Menelaos K.
Johnson, Eric G.
Shori, Ramesh K.
GP IEEE
TI 2.78 mu m Fluoride Glass Fiber Laser Using Guided Mode Resonance Filter
as External Cavity Mirror
SO 2012 IEEE PHOTONICS CONFERENCE (IPC)
SE IEEE Photonics Conference
LA English
DT Proceedings Paper
CT 25th IEEE Photonics Conference (IPC)
CY SEP 23-27, 2012
CL Burlingame, CA
SP IEEE, Kotura, Rockley Grp, Intel, Cisco, Oracle Labs, Corning, Google, Luxtera, Fiber Chip, Rambus, Analog Devices, PMC, Sinoora, Soitec, Photon Design, Nat Photon, Commun Technol Roadmap, Simgui
DE Fiber lasers; Optical filters
AB A diode pumped CW Erbium (Er)-doped Zr-Ba-La-Al-Na (ZBLAN) fluoride glass fiber laser operating at 2.78 mu m was demonstrated using a guided mode resonance filter (GMRF) as an external cavity mirror.
C1 [Li, Yuan; Woodward, Ryan H.; Srimathi, Indumathi Raghu; Pung, Aaron J.; Poutous, Menelaos K.; Johnson, Eric G.] Clemson Univ, Holcombe Dept Elect & Comp Engn, Riggs Hall, Clemson, SC 29634 USA.
[Shori, Ramesh K.] Naval Air Warfare Ctr, China Lake, CA USA.
RP Johnson, EG (reprint author), Clemson Univ, Holcombe Dept Elect & Comp Engn, Riggs Hall, Clemson, SC 29634 USA.
EM ejohns8@clemson.edu
FU HEL- JTO/ AFOSR MRI - " 3D Meta- Optics for High Energy Lasers [FA9550-
10- 1- 0543]
FX This work is supported by: HEL- JTO/ AFOSR MRI - " 3D Meta- Optics for
High Energy Lasers" FA9550- 10- 1- 0543
NR 11
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2374-0140
BN 978-1-4577-0733-9
J9 IEEE PHOTON CONF
PY 2012
BP 826
EP +
PG 2
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BDD75
UT WOS:000312865000408
ER
PT J
AU Palmisano, JS
Geder, JD
Ramamurti, R
Sandberg, WC
Ratna, B
AF Palmisano, John S.
Geder, Jason D.
Ramamurti, Ravi
Sandberg, William C.
Ratna, Banahalli
TI Robotic pectoral fin thrust vectoring using weighted gait combinations
SO APPLIED BIONICS AND BIOMECHANICS
LA English
DT Article
DE CFD; controlled curvature; pectoral fin; weighted gait combination;
thrust vectoring
ID FLAPPING AQUATIC FLIGHT; LINE FLOW SENSORS; LABRIFORM PROPULSION; BIRD
WRASSE; DESIGN; FISHES; COMPUTATION; LOCOMOTION; SHAPE
AB A method was devised to vector propulsion of a robotic pectoral fin by means of actively controlling fin surface curvature. Separate flapping fin gaits were designed to maximize thrust for each of three different thrust vectors: forward, reverse, and lift. By using weighted combinations of these three pre-determined main gaits, new intermediate hybrid gaits for any desired propulsion vector can be created with smooth transitioning between these gaits. This weighted gait combination (WGC) method is applicable to other difficult-to-model actuators. Both 3D unsteady computational fluid dynamics (CFD) and experimental results are presented.
C1 [Palmisano, John S.; Ratna, Banahalli] USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
[Geder, Jason D.; Ramamurti, Ravi; Sandberg, William C.] USN, Res Lab, Computat Phys & Fluid Dynam Lab, Washington, DC 20375 USA.
[Sandberg, William C.] Sci Applicat Int Corp, Orat, Mclean, VA 22102 USA.
RP Palmisano, JS (reprint author), USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
EM palmisano@gmail.com
NR 27
TC 4
Z9 4
U1 1
U2 9
PU IOS PRESS
PI AMSTERDAM
PA NIEUWE HEMWEG 6B, 1013 BG AMSTERDAM, NETHERLANDS
SN 1176-2322
J9 APPL BIONICS BIOMECH
JI Appl. Bionics Biomech.
PY 2012
VL 9
IS 3
BP 333
EP 345
DI 10.3233/ABB-2012-0064
PG 13
WC Engineering, Biomedical; Robotics
SC Engineering; Robotics
GA 084CZ
UT WOS:000314515400009
ER
PT J
AU Jones, M
AF Jones, Marcus
BE Murray, W
Mansoor, PR
TI Fighting "this nation of liars to the very end" The German Army in the
Franco-Prussian War, 1870-1871
SO HYBRID WARFARE: FIGHTING COMPLEX OPPONENTS FROM THE ANCIENT WORLD TO THE
PRESENT
LA English
DT Article; Book Chapter
C1 USN Acad, Annapolis, MD 21402 USA.
RP Jones, M (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 90
TC 1
Z9 1
U1 0
U2 0
PU CAMBRIDGE UNIV PRESS
PI CAMBRIDGE
PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
BN 978-1-107-02608-7
PY 2012
BP 171
EP 198
D2 10.1017/CBO9781139199254
PG 28
WC History
SC History
GA BDF05
UT WOS:000312992000007
ER
PT J
AU Maurer, JH
AF Maurer, John H.
TI 'Winston has gone mad': Churchill, the British Admiralty, and the Rise
of Japanese Naval Power
SO JOURNAL OF STRATEGIC STUDIES
LA English
DT Article
DE Churchill; Britain between the World Wars; Royal Navy; Japanese Navy;
Strategic Assessments
AB As Chancellor of the Exchequer during the late 1920s, Winston Churchill was at the center of British strategic decision making about how to respond to the naval challenge posed by Japan's rise as a rival sea power. Churchill downplayed the likelihood of war with Japan. The leadership of the Royal Navy disagreed: they saw Japan as a dangerous threat to the security of the British Empire. Examining this dispute between Churchill and the Admiralty highlights the awkward political, economic, and strategic tradeoffs confronting British leaders between the world wars.
C1 USN, War Coll, Strategy & Policy Dept, Newport, RI USA.
RP Maurer, JH (reprint author), USN, War Coll, Strategy & Policy Dept, Newport, RI USA.
NR 29
TC 0
Z9 0
U1 1
U2 4
PU ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXFORDSHIRE, ENGLAND
SN 0140-2390
J9 J STRATEGIC STUD
JI J. Strateg. Stud.
PY 2012
VL 35
IS 6
BP 775
EP 798
DI 10.1080/01402390.2012.654648
PG 24
WC International Relations; Political Science
SC International Relations; Government & Law
GA 077HP
UT WOS:000314018800004
ER
PT S
AU Gottshall, KR
Sessoms, PH
Bartlett, JL
AF Gottshall, Kim R.
Sessoms, Pinata H.
Bartlett, Jamie L.
GP IEEE
TI Vestibular Physical Therapy Intervention: Utilizing a Computer Assisted
Rehabilitation Environment in lieu of Traditional Physical Therapy
SO 2012 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE
AND BIOLOGY SOCIETY (EMBC)
SE IEEE Engineering in Medicine and Biology Society Conference Proceedings
LA English
DT Proceedings Paper
CT 34th Annual International Conference of the IEEE
Engineering-in-Medicine-and-Biology-Society (EMBS)
CY AUG 28-SEP 01, 2012
CL San Diego, CA
SP IEEE, Engn Med & Biol Soc (EMBS), CAS, SMC, PubMed, MEDLINE
ID TRAUMATIC BRAIN-INJURY
AB Advanced technology such as virtual reality or immersive environments increases the complexities and challenges therapists can impose on their patients. In this study, four patients with mild traumatic brain injury utilized a Computer Assisted Rehabilitation Environment (CAREN) in place of traditional vestibular physical therapy. Patients visited the CAREN twice weekly for 6 weeks. Therapy sessions included a variety of applications that tasked the cognitive and physical capabilities of individual patients. After the 6 weeks, all patients showed improvement on balance, gait and visual measures. Virtual reality based therapy is an engaging and effective tool to treat patients with deficiencies related to a prior brain injury.
C1 [Gottshall, Kim R.] USN, Med Ctr, San Diego, CA 92134 USA.
RP Gottshall, KR (reprint author), USN, Med Ctr, San Diego, CA 92134 USA.
EM kim.gottshall@med.navy.mil; pinata.sessoms@med.navy.mil;
Jamie.bartlett@med.navy.mil
NR 8
TC 5
Z9 5
U1 0
U2 5
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1557-170X
BN 978-1-4577-1787-1
J9 IEEE ENG MED BIO
PY 2012
BP 6141
EP 6144
PG 4
WC Engineering, Biomedical; Engineering, Electrical & Electronic
SC Engineering
GA BDH78
UT WOS:000313296506083
ER
PT S
AU Kam, C
Kompella, S
Nguyen, GD
Ephremides, A
Jiang, ZH
AF Kam, Clement
Kompella, Sastry
Nguyen, Gam D.
Ephremides, Anthony
Jiang, Zaihan
GP IEEE
TI Optimal Frequency Selection for Energy Efficient Underwater Acoustic
Networks
SO 2012 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC)
SE IEEE International Conference on Communications
LA English
DT Proceedings Paper
CT IEEE International Conference on Communications (ICC)
CY JUN 10-15, 2012
CL Ottawa, CANADA
SP IEEE
AB The underwater acoustic channel is characterized by a path loss that is dependent on both the distance and the frequency of communication. Given this dependence, it has been previously demonstrated that for a given communication distance, there is an optimal operating frequency, where conditions for signal propagation and noise are most favorable. In this work, we consider extending this optimal frequency concept to scenarios in which the frequencies that can be employed by the system are constrained. Such constraints are important considerations for practical system design. The first problem we study is to find a single frequency that minimizes the energy over a number of links of varying lengths. An approximate model for this frequency is proposed that is very close to the true optimal. We then generalize this problem to finding the best frequency band, within which the frequency can be tuned for different link lengths. We demonstrate how our model is applied to a 2-D network scenario. We simulate random node placement for such a network, and we observe that the optimal frequencies are very close to the proposed model.
C1 [Kam, Clement; Kompella, Sastry; Nguyen, Gam D.] USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
RP Kam, C (reprint author), USN, Res Lab, Div Informat Technol, Washington, DC 20375 USA.
NR 7
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-3607
BN 978-1-4577-2053-6
J9 IEEE ICC
PY 2012
PG 5
WC Telecommunications
SC Telecommunications
GA BDD72
UT WOS:000312855700073
ER
PT S
AU Policastro, SA
Eppard, S
Lawrence, SH
Strom, MJ
Rayne, RJ
Hansen, D
Martin, FJ
AF Policastro, S. A.
Eppard, S.
Lawrence, S. H.
Strom, M. J.
Rayne, R. J.
Hansen, D.
Martin, F. J.
BE Rohwerder, M
Gelling, VJ
TI Investigating the Failure Mechanisms for an Epoxy-Polyamide Coating in a
Seawater Environment
SO COATINGS FOR CORROSION PROTECTION
SE ECS Transactions
LA English
DT Proceedings Paper
CT Symposium on Coatings for Corrosion Protection Held During the 220th
Meeting of the Electrochemical-Society (ECS)
CY OCT 09-14, 2011
CL Boston, MA
SP Electrochem Soc (ECS), Corros
ID CORROSION; PROTECTION; SURFACES; METALS
AB The results from the first twelve months of alternate seawater immersion for test panels are presented here. After preparation, the test panels were either kept clean or deliberately contaminated with a set amount of NaCl and then coated with varying thicknesses of epoxy-polyamide coating and left at open-circuit or cathodically protected with a Zn anode. Visible corrosion was observed on samples that received chloride contamination but no cathodic protection, but multiple kinetics processes were observed on all the test panels. Though the alternate immersion regimen is not completed, results indicate that, although water uptake by the coating is significant and that the barrier properties of the coating are degrading, anodic dissolution is not proceeding to an appreciable extent on the non-contaminated surfaces.
C1 [Policastro, S. A.; Eppard, S.; Lawrence, S. H.; Strom, M. J.; Martin, F. J.] USN, Res Lab, Div Chem, Washington, DC 20375 USA.
[Rayne, R. J.] Mat Sci & Technol Div, Naval Res Lab, Washington, DC 20375 USA.
[Hansen, D.] Univ Dayton Res Inst, Dayton, OH 45469 USA.
RP Policastro, SA (reprint author), USN, Res Lab, Div Chem, Washington, DC 20375 USA.
FU Office of Naval Research
FX The authors gratefully acknowledge the financial support of the Office
of Naval Research.
NR 14
TC 0
Z9 0
U1 1
U2 6
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-56677-947-0
J9 ECS TRANSACTIONS
PY 2012
VL 41
IS 15
BP 53
EP 74
DI 10.1149/1.3696870
PG 22
WC Electrochemistry; Materials Science, Coatings & Films
SC Electrochemistry; Materials Science
GA BDL64
UT WOS:000313673600005
ER
PT J
AU Jiang, J
You, BJ
Liu, E
Apte, A
Yarina, TR
Myers, TE
Lee, JS
Francesconi, SC
O'Guinn, ML
Tsertsvadze, N
Vephkhvadze, N
Babuadze, G
Sidamonidze, K
Kokhreidze, M
Donduashvili, M
Onashvili, T
Ismayilov, A
Agayev, N
Aliyev, M
Muttalibov, N
Richards, AL
AF Jiang, Ju
You, Brian J.
Liu, Evan
Apte, Anisha
Yarina, Tamasin R.
Myers, Todd E.
Lee, John S.
Francesconi, Stephen C.
O'Guinn, Monica L.
Tsertsvadze, Nikoloz
Vephkhvadze, Nino
Babuadze, Giorgi
Sidamonidze, Ketevan
Kokhreidze, Maka
Donduashvili, Marina
Onashvili, Tinatin
Ismayilov, Afrail
Agayev, Nigar
Aliyev, Mubariz
Muttalibov, Nizam
Richards, Allen L.
TI Development of three quantitative real-time PCR assays for the detection
of Rickettsia raoultii, Rickettsia slovaca, and Rickettsia aeschlimannii
and their validation with ticks from the country of Georgia and the
Republic of Azerbaijan
SO TICKS AND TICK-BORNE DISEASES
LA English
DT Article
DE R. raoultii; R. slovaca; R. aeschlimannii; Quantitative real-time PCR
assays; The country of Georgia
ID FEVER GROUP RICKETTSIA; POLYMERASE-CHAIN-REACTION; SPOTTED-FEVER;
ORIENTIA-TSUTSUGAMUSHI; BORNE RICKETTSIOSES; HYALOMMA-MARGINATUM;
DISEASE; INFECTION; LYMPHADENOPATHY; IDENTIFICATION
AB A previous surveillance study of human pathogens within ticks collected in the country of Georgia showed a relatively high infection rate for Rickettsia raoultii, R. slovaca, and R. aeschlimannii. These 3 spotted fever group rickettsiae are human pathogens: R. raoultii and R. slovaca cause tick-borne lymphadenopathy (TIBOLA), and R. aeschlimannii causes an infection characterized by fever and maculopapular rash. Three quantitative real-time polymerase chain reaction (qPCR) assays, Rraoul, Rslov, and Raesch were developed and optimized to detect R. raoultii, R. slovaca, and R. aeschlimannii, respectively, by targeting fragments of the outer membrane protein B gene (ompB) using species-specific molecular beacon or TaqMan probes. The 3 qPCR assays showed 100% specificity when tested against a rickettsiae DNA panel (n = 20) and a bacteria DNA panel (n = 12). The limit of detection was found to be at least 3 copies per reaction for all assays. Validation of the assays using previously investigated tick nucleic acid preparations, which included Rickettsia-free tick samples, tick samples that contain R. raoultii, R. slovaca, R. aeschlimannii, and other Rickettsia spp., gave 100% sensitivity for all 3 qPCR assays. In addition, a total of 65 tick nucleic acid preparations (representing 259 individual ticks) collected from the country of Georgia and the Republic of Azerbaijan in 2009 was tested using the 3 qPCR assays. R. raoultii, R. slovaca, and R. aeschlimannii were not detected in any ticks (n = 31) from the Republic of Azerbaijan, but in the ticks from the country of Georgia (n = 228) the minimal infection rate for R. raoultii and R. slovaca in Dermacentor marginatus was 10% and 4%, respectively, and for R. aeschlimannii in Haemaphysalis sulcata and Hyalomma spp. it was 1.9% and 20%, respectively. Published by Elsevier GmbH.
C1 [Richards, Allen L.] USN, Med Res Ctr, Viral & Rickettsial Dis Dept, Silver Spring, MD 20910 USA.
[Lee, John S.; O'Guinn, Monica L.] USA, Med Res Inst Infect Dis, Ft Detrick, MD 21702 USA.
[Tsertsvadze, Nikoloz; Babuadze, Giorgi; Sidamonidze, Ketevan] Natl Ctr Dis Control, Tbilisi, Rep of Georgia.
[Vephkhvadze, Nino; Kokhreidze, Maka; Donduashvili, Marina; Onashvili, Tinatin] Lab Minist Agr, Tbilisi, Rep of Georgia.
[Ismayilov, Afrail; Agayev, Nigar] Republican Antiplague Stn, Baku, Azerbaijan.
[Aliyev, Mubariz] Inst Med Prophylaxis, Baku, Azerbaijan.
[Muttalibov, Nizam] Republican Hyg & Epidemiol Ctr, Baku, Azerbaijan.
RP Richards, AL (reprint author), USN, Med Res Ctr, Viral & Rickettsial Dis Dept, 503 Robert Grant Ave, Silver Spring, MD 20910 USA.
EM Allen.Richards@med.navy.mil
RI Valle, Ruben/A-7512-2013
FU Defense Threat Reduction Agency [B0017 60000.000.0.B0017]
FX Funding provided by the Defense Threat Reduction Agency, Work unit #
B0017 60000.000.0.B0017.
NR 28
TC 9
Z9 10
U1 0
U2 7
PU ELSEVIER GMBH, URBAN & FISCHER VERLAG
PI JENA
PA OFFICE JENA, P O BOX 100537, 07705 JENA, GERMANY
SN 1877-959X
J9 TICKS TICK-BORNE DIS
JI Ticks Tick-Borne Dis.
PY 2012
VL 3
IS 5-6
BP 326
EP 330
DI 10.1016/j.ttbdis.2012.10.004
PG 5
WC Infectious Diseases; Microbiology; Parasitology
SC Infectious Diseases; Microbiology; Parasitology
GA 078EK
UT WOS:000314081000014
PM 23182543
ER
PT S
AU Bernhardt, PA
Fliflet, AW
AF Bernhardt, Paul A.
Fliflet, Arne W.
GP IEEE
TI Electric Field Glow Discharge inside Externally Excited Porous Spherical
Cavity Resonators
SO 2012 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
(APSURSI)
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE International Symposium on Antennas and Propagation
CY JUL 08-14, 2012
CL Chicago, IL
SP Inst Electr Electron Engineers, IEEE Antennas & Propaga Soc
AB A porous spherical cavity resonator (PSCR) provides amplification of externally incident electric fields a resonant frequencies corresponding to discrete modes. The PSCR has a mesh surface with a large number of polygon (hexagon and pentagon) holes. The size of the holes is adjusted to maximize the Q of the resonator for production of maximum internal electrical fields. Amplification factors for a PSCR can be over 1000. The high resonator Q, that may exceed 10000, requires precise tuning of the incident wave frequency to a resonant frequency. The PSCR can be placed in a low-pressure (1 T) gas chamber and excited by an external microwave horn to excite a chosen spherical cavity resonator mode. At the resonant frequency, a glow discharge can occur inside the cavity producing a plasma cloud in the shape of electric field modes that are excited. Varying the neutral gas pressure inside the chamber (1) yields variations in the glow discharge light intensity and (2) affects the shapes of the plasma cloud. If the plasma frequency in the electron cloud approaches the incident wave frequency, self-action produces localized regions of dense plasmas. The PSCR apparatus can be used to study cavity resonator modes in the low pressure environment and electromagnetic wave interactions in high pressure plasmas.
C1 [Bernhardt, Paul A.; Fliflet, Arne W.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Bernhardt, PA (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
EM Paul.Bernhardt@nrl.navy.mil
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-4673-0462-7
J9 IEEE ANTENNAS PROP
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BDB29
UT WOS:000312442302049
ER
PT S
AU Chatterjee, D
Rao, SM
Kluskens, MS
AF Chatterjee, Deb
Rao, Sadasiva M.
Kluskens, Michael S.
GP IEEE
TI Numerical Comparison of Exact and Asymptotic Methods for Sommerfeld
Integral Evaluation with Applications to Microstrip Antennas
SO 2012 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
(APSURSI)
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE International Symposium on Antennas and Propagation
CY JUL 08-14, 2012
CL Chicago, IL
SP Inst Electr Electron Engineers, IEEE Antennas & Propagat Soc
ID GREENS-FUNCTIONS; LAYERED MEDIA; TAILS; POLES
AB In this paper a new method for evaluating Sommerfeld integrals for arbitrary source and receiver location pairs, for a horizontal electric dipole (HED) located at the air-dielectric interface of a PEC-terminated dielectric media, is described. The proposed method is valid for both large and small lateral separations, and for arbitrary receiver locations. Unlike past investigations, the proposed method avoids location, and associated residue calculation of the poles of the integrand through deforming a part of the real-axis in the upper half plane that is free from any pole singularities of the Sommerfeld integrand. Compared to an earlier investigation reported by the present authors, the present approach includes situations when both the source and receiver are exactly on the interface.
C1 [Chatterjee, Deb] UMKC, CSEE Dept, 5110 Rockhill Rd, Kansas City, MO 64110 USA.
[Rao, Sadasiva M.; Kluskens, Michael S.] Naval Res Lab, Div Radar, Washington, DC 20375 USA.
RP Chatterjee, D (reprint author), UMKC, CSEE Dept, 5110 Rockhill Rd, Kansas City, MO 64110 USA.
EM chatd@umkc.edu; sadasiva.rao@nrl.navy.mil; michael.kluskens@nrl.navy.mil
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-4673-0462-7
J9 IEEE ANTENNAS PROP
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BDB29
UT WOS:000312442300380
ER
PT S
AU Ettorre, M
Rudolph, SM
Grbic, A
AF Ettorre, Mauro
Rudolph, Scott M.
Grbic, Anthony
GP IEEE
TI A Leaky Radial Waveguide for Generating Propagating Bessel Beams
SO 2012 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
(APSURSI)
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE International Symposium on Antennas and Propagation
CY JUL 08-14, 2012
CL Chicago, IL
SP Inst Electr Electron Engineers, IEEE Antennas & Propagat Soc
AB We report a leaky radial waveguide that can generate propagating Bessel beams by supporting an azimuthally invariant leaky-wave mode. The normal electric-field component of the mode is a truncated, zeroth-order Bessel function. Design relations for the radial waveguide are provided based on a vector field approach in contrast to previous scalar-based approaches. Electric field measurements and their respective Fourier transforms validate the operation of the prototype as a Bessel-beam launcher. In particular, the Fourier transform of the measured electric field exhibits a ring in the spectral domain at the operating frequency, as expected for Bessel beams. The proposed structure can be used for generating arbitrary zeroth-order propagating Bessel beams at microwave or millimeter-wave frequencies.
C1 [Ettorre, Mauro] Univ Rennes 1, Inst Elect & Telecommun Rennes, UMR CNRS 6164, F-35042 Rennes, France.
[Rudolph, Scott M.] Naval Res Lab, Washington, DC 20375 USA.
[Grbic, Anthony] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA.
RP Ettorre, M (reprint author), Univ Rennes 1, Inst Elect & Telecommun Rennes, UMR CNRS 6164, F-35042 Rennes, France.
EM mauro.ettorre@univ-rennes1.fr; scott.rudolph@nrl.navy.mil;
agrbic@umich.edu
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-4673-0462-7
J9 IEEE ANTENNAS PROP
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BDB29
UT WOS:000312442302079
ER
PT S
AU Rao, SM
Chatterjee, D
AF Rao, Sadasiva M.
Chatterjee, Deb
GP IEEE
TI A Simple Procedure to Evaluate Sommefeld Integrals in Layered Media
Problems
SO 2012 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
(APSURSI)
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE International Symposium on Antennas and Propagation
CY JUL 08-14, 2012
CL Chicago, IL
SP Inst Electr Electron Engineers, IEEE Antennas & Propagat Soc
AB In this work, we develop a numerical method to evaluate the Sommerfeld Integrals appearing in layered media problems using Chebyshev polynomials of the first kind. Chebyshev polynomials are important in approximation theory because the roots of the Chebyshev polynomials of the first kind can be used for polynomial interpolation to a high degree of accuracy. The resulting algorithm is much simpler than the conventional discrete complex image method. A few representative numerical examples are presented to illustrate the applicability of the new method.
C1 [Rao, Sadasiva M.] USN, Div Radar, Res Lab, Code 5314, Washington, DC 20375 USA.
[Chatterjee, Deb] Univ Missouri Kansas City UMKC, CSEE Dept, Kansas City, MO 64110 USA.
RP Rao, SM (reprint author), USN, Div Radar, Res Lab, Code 5314, Washington, DC 20375 USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-4673-0462-7
J9 IEEE ANTENNAS PROP
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BDB29
UT WOS:000312442300179
ER
PT S
AU Saakian, A
AF Saakian, Artem
GP IEEE
TI CEM Optimization of the HF Antennas Installations Onboard the Aircraft
SO 2012 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM
(APSURSI)
SE IEEE Antennas and Propagation Society International Symposium
LA English
DT Proceedings Paper
CT IEEE International Symposium on Antennas and Propagation
CY JUL 08-14, 2012
CL Chicago, IL
SP Inst Electr Electron Engineers, IEEE Antennas & Propaga Soc
AB A novel approach is considered for optimal installation of Notch-Fed (NF) and Shunt-Fed (SF) High Frequency (HF) slot-antennas onboard aircraft (a/c). A numerical experiment is employed while the a/c is illuminated by a plane wave incident from the direction of the proposed antenna's desired radiation. This allows identifying the optimal position of the HF antenna by placing it in the areas of maximal induced current density to obtain desired radiation direction, for given polarization, and frequency. For the highest achievable radiation efficiency, the antenna slot must be positioned perpendicular to the surface current lines. In general, this proposed approach is applicable to all cases when the size of the a/c is comparable to a wavelength.
C1 USN, Air Syst Command, Radar & Antennas Syst Div 4 5 5, Patuxent River, MD USA.
RP Saakian, A (reprint author), USN, Air Syst Command, Radar & Antennas Syst Div 4 5 5, Patuxent River, MD USA.
EM artem.saakian@navy.mil
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1522-3965
BN 978-1-4673-0462-7
J9 IEEE ANTENNAS PROP
PY 2012
PG 2
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BDB29
UT WOS:000312442301351
ER
PT S
AU Wagner, KT
Doroslovacki, MI
AF Wagner, Kevin T.
Doroslovacki, Milos I.
GP IEEE
TI COMPLEX PROPORTIONATE-TYPE NORMALIZED LEAST MEAN SQUARE ALGORITHMS
SO 2012 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL
PROCESSING (ICASSP)
SE International Conference on Acoustics Speech and Signal Processing
ICASSP
LA English
DT Proceedings Paper
CT IEEE International Conference on Acoustics, Speech and Signal Processing
CY MAR 25-30, 2012
CL Kyoto, JAPAN
SP Inst Elect & Elect Engineers, Signal Processing Soc, IEEE
DE Adaptive filtering; convergence; least mean square algorithms
AB A complex proportionate-type normalized least mean square algorithm is derived by minimizing the second norm of the weighted difference between the current estimate of the impulse response and the estimate at the next time step under the constraint that the adaptive filter a posteriori output is equal to the measured output. The weighting function is assumed positive but otherwise arbitrary and it is directly related to the update gains. No assumptions regarding the input signal are made during the derivation. Different weights (i.e., gains) are used for real and imaginary parts of the estimated impulse response. After additional assumptions special cases of the algorithm are obtained: the algorithm with one gain per impulse response coefficient and the algorithm with lower computational complexity. The learning curves of the algorithms are compared for several standard gain assignment laws for white and colored input. It was demonstrated that, in general, the algorithms with separate gains for real and imaginary parts have faster convergence.
C1 [Wagner, Kevin T.] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
RP Wagner, KT (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
NR 4
TC 2
Z9 3
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1520-6149
BN 978-1-4673-0046-9
J9 INT CONF ACOUST SPEE
PY 2012
BP 3285
EP 3288
PG 4
WC Acoustics; Engineering, Electrical & Electronic
SC Acoustics; Engineering
GA BDA84
UT WOS:000312381403090
ER
PT S
AU Raj, RG
Bovik, AC
AF Raj, Raghu G.
Bovik, Alan C.
GP IEEE
TI The Multilinear Compound Gaussian Distribution
SO 2012 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL
PROCESSING (ICASSP)
SE International Conference on Acoustics Speech and Signal Processing
ICASSP
LA English
DT Proceedings Paper
CT IEEE International Conference on Acoustics, Speech and Signal Processing
CY MAR 25-30, 2012
CL Kyoto, JAPAN
SP Inst Elect & Elect Engineers, Signal Processing Soc, IEEE
DE GSM; MICA; MCG; Bayesian; Nonlinear
AB We introduce a novel generalization of the compound Gaussian (CG) (or Gaussian Scale Mixture [1]) distribution which extends the Gaussian component of the CG model to a multilinear distribution. The resulting model, which we call the Multilinear Compound Gaussian (MCG) distribution, subsumes both GSM [1] and the previously developed MICA [3-4] distributions as complementary special cases; thereby allowing us to model a richer class of stochastic phenomena. First we derive the structural characterization of the MCG distribution and develop some of its important theoretical properties. Thereafter we describe a parameter estimation algorithm for learning this model from sample data, and then deploy this for modeling textures, including natural (i.e. optical) and SAR images. Our simulation results demonstrate how, for each case, we obtain improved performance over the CG model; thus indicating the versatility of the MCG model in accurately modeling various natural phenomena of interest.
C1 [Raj, Raghu G.] USN, Res Lab, Div Radar, Washington, DC 20375 USA.
RP Raj, RG (reprint author), USN, Res Lab, Div Radar, Washington, DC 20375 USA.
RI Bovik, Alan/B-6717-2012
OI Bovik, Alan/0000-0001-6067-710X
NR 9
TC 0
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1520-6149
BN 978-1-4673-0046-9
J9 INT CONF ACOUST SPEE
PY 2012
BP 3849
EP 3852
PG 4
WC Acoustics; Engineering, Electrical & Electronic
SC Acoustics; Engineering
GA BDA84
UT WOS:000312381403229
ER
PT S
AU Kirkendall, C
AF Kirkendall, Clay
BE Liao, Y
Jin, W
Sampson, DD
Yamauchi, R
Chung, Y
Nakamura, K
Rao, Y
TI Fiber optic acoustic sensing
SO 22ND INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS, PTS 1-3
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT 22nd International Conference on Optical Fiber Sensors (OFS)
CY OCT 15-19, 2012
CL Beijing, PEOPLES R CHINA
SP Tsinghua Univ, Hong Kong Polytechn Univ, BeiHang Univ, Harbin Engn Univ, Wuhan Univ Technol
DE hydrophone; fiber optic; interferometric sensor; fiber laser sensor;
vector sensor
ID ACCELEROMETERS
AB A review of fiber optic acoustic sensors for naval applications is presented. Limitations of fiber interferometric sensors are described and novel acoustic sensor transducers enabled through fiber laser sensor technology are presented.
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Kirkendall, C (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 17
TC 0
Z9 0
U1 3
U2 13
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9103-9
J9 PROC SPIE
PY 2012
VL 8421
AR 84210P
DI 10.1117/12.979484
PG 6
WC Remote Sensing; Optics
SC Remote Sensing; Optics
GA BDF39
UT WOS:000313011500021
ER
PT J
AU Jenn, D
Ton, C
AF Jenn, David
Ton, Cuong
TI Wind Turbine Radar Cross Section
SO INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION
LA English
DT Article
AB The radar cross section (RCS) of a wind turbine is a figure of merit for assessing its effect on the performance of electronic systems. In this paper, the fundamental equations for estimating the wind turbine clutter signal in radar and communication systems are presented. Methods of RCS prediction are summarized, citing their advantages and disadvantages. Bistatic and monostatic RCS patterns for two wind turbine configurations, a horizontal axis three-blade design and a vertical axis helical design, are shown. The unique electromagnetic scattering features, the effect of materials, and methods of mitigating wind turbine clutter are also discussed.
C1 [Jenn, David] USN, Postgrad Sch, Monterey, CA 93943 USA.
[Ton, Cuong] USN, Weap Div, Air Warfare Ctr, Point Mugu Nawc, CA 93042 USA.
RP Jenn, D (reprint author), USN, Postgrad Sch, 833 Dyer Rd,Room 437, Monterey, CA 93943 USA.
EM jenn@nps.edu
NR 27
TC 9
Z9 9
U1 0
U2 11
PU HINDAWI PUBLISHING CORPORATION
PI NEW YORK
PA 410 PARK AVENUE, 15TH FLOOR, #287 PMB, NEW YORK, NY 10022 USA
SN 1687-5869
J9 INT J ANTENN PROPAG
JI Int. J. Antennas Propag.
PY 2012
AR 252689
DI 10.1155/2012/252689
PG 14
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA 069OM
UT WOS:000313446000001
ER
PT S
AU Dalmasse, K
Pariat, E
Antiochos, SK
DeVore, CR
AF Dalmasse, K.
Pariat, E.
Antiochos, S. K.
DeVore, C. R.
BE Faurobert, M
Fang, C
Corbard, T
TI CORONAL JETS IN AN INCLINED CORONAL MAGNETIC FIELD: A PARAMETRIC 3D MHD
STUDY
SO UNDERSTANDING SOLAR ACTIVITY: ADVANCES AND CHALLENGES
SE EAS Publications Series
LA English
DT Proceedings Paper
CT 4th French-Chinese Meeting on Solar Physics
CY NOV 15-18, 2011
CL Nice, FRANCE
SP CNRS, Programme Natl Soleil-Terre, Univ Nice-Sophia Antipolis, Observ Cote Azur, UNS-CNRS, Lab Fizeau, OCA-CNRS, Lab Cassiopee, Natl Nat Sci Fdn China
ID X-RAY JETS; HINODE
AB X-ray solar coronal jets are short-duration, fast, well collimated plasma brightenings occurring in the solar corona. To explain and understand the processes driving the jets, one must be able to model an explosive release of free energy. Magnetic reconnection is believed to play a key role in the generation of these energetic bursting events. The model of jets that we have been developing is based on a magnetic field constructed by embedding a vertical magnetic dipole in a uniform open magnetic field. In this study, we investigate the influence of the inclination of the open field on the properties of the jet using numerical simulations. We will show that the inclination of the open field is of critical importance for the properties of the jet such as the energy released. We conclude that the characteristics of the open field at the time of observations are a central criterion that must be taken into account and reported on in observational studies.
C1 [Dalmasse, K.; Pariat, E.] Univ Paris Diderot, Univ Paris 06, LESIA, Observ Paris,CNRS, Paris, France.
[Antiochos, S. K.] NASA, Goddard Space Flight Ctr, Space Weather Lab, Greenbelt, MD 20771 USA.
[DeVore, C. R.] Naval Res Lab, Lab Comptuat Phy & Fluid Mech, Washington, DC 20375 USA.
RP Dalmasse, K (reprint author), Univ Paris Diderot, Univ Paris 06, LESIA, Observ Paris,CNRS, Paris, France.
EM kevin.dalmasse@laposte.net; etienne.pariat@obspm.fr
RI Antiochos, Spiro/D-4668-2012; DeVore, C/A-6067-2015
OI Antiochos, Spiro/0000-0003-0176-4312; DeVore, C/0000-0002-4668-591X
NR 12
TC 4
Z9 4
U1 0
U2 1
PU E D P SCIENCES
PI CEDEX A
PA 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A,
FRANCE
SN 1633-4760
BN 978-2-7598-0752-9
J9 EAS PUBLICATIONS
PY 2012
VL 55
BP 201
EP +
DI 10.1051/eas/1255028
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BDE82
UT WOS:000312967500028
ER
PT S
AU Zeller, J
Manzur, T
AF Zeller, John
Manzur, Tariq
BE Carapezza, EM
TI Free-space optical communication at 1.55 mu m and 4.85 mu m and
turbulence measurements in the evaporation layer
SO UNMANNED/UNATTENDED SENSORS AND SENSOR NETWORKS IX
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Unmanned/Unattended Sensors and Sensor Networks IX
CY SEP 26-27, 2012
CL Edinburgh, SCOTLAND
SP SPIE, SELEX GALILEO, THALES
DE Free-space optics; evaporation layer; communication networks; MODTRAN;
quantum cascade lasers
ID REFRACTIVE-INDEX; PARAMETER
AB Free-space optics (FSO) holds the potential for high bandwidth communication in situations where landline communication is not practical, with relatively low cost and maintenance. The short-wave infrared (SWIR) and mid-wave infrared (MWIR) bands contain atmospheric transmission windows spanning approximately 1.50-1.75 mu m and 4.6-4.9 mu m, respectively. Transmission coefficients and losses were modeled using MODTRAN for optical path lengths of up to 2 km to for various atmospheric conditions. The determination of the refractive index structure parameter C-n(2) is useful in calculating the time-dependent Fried parameter, r(0), which provides an indication of the magnitude of the phase distortion of an optical wavefront by scintillation in accordance with the Kalomogorov model. By better understanding the effects of turbulence and C-n(2) on FSO transmission through modeling and experimental measurements, measures can be implemented to reduce the bit error rate and increase data throughput, enabling more efficient and accurate communication links. FSO beam optimization is achievable using a Shack-Hartmann wavefront sensor, whereby wavefront distortion of a transmitted beam is measured to compensate in real time for the effects of turbulence to provide optimized FSO reception. Using advanced techniques and compensation methods, limitations associated with infrared FSO transmission and reception in the evaporation layer may be overcome or circumvented to provide high bandwidth communication through turbulence and/or adverse weather conditions.
C1 [Zeller, John; Manzur, Tariq] USN, Undersea Warfare Ctr NUWC, Newport, RI 02841 USA.
RP Zeller, J (reprint author), USN, Undersea Warfare Ctr NUWC, Newport, RI 02841 USA.
NR 17
TC 0
Z9 0
U1 0
U2 1
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9281-4
J9 PROC SPIE
PY 2012
VL 8540
AR 85400C
DI 10.1117/12.978292
PG 12
WC Remote Sensing; Optics
SC Remote Sensing; Optics
GA BDH73
UT WOS:000313292600008
ER
PT S
AU Zeller, J
Manzur, T
Kar, A
AF Zeller, John
Manzur, Tariq
Kar, Aravinda
BE Carapezza, EM
TI Uncooled MWIR SiC optical detector response dynamics and digital imaging
SO UNMANNED/UNATTENDED SENSORS AND SENSOR NETWORKS IX
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Unmanned/Unattended Sensors and Sensor Networks IX
CY SEP 26-27, 2012
CL Edinburgh, SCOTLAND
SP SPIE, SELEX GALILEO, THALES
DE Silicon carbide; uncooled detector; wide bandgap; optical detector;
response dynamics; mid-wave infrared
ID SILICON-CARBIDE
AB Crystalline silicon carbide (SiC) is a wide bandgap covalent semiconductor material with excellent thermo-mechanical and optical properties. While the covalent bonding between the Si and C atoms allows n-type or p-type doping by incorporating dopant atoms into both the Si and C sites, the wide bandgap enables fabrication of optical detectors over a wide range of wavelengths. To fabricate a mid-wave infrared (MWIR) detector, an n-type 4H-SiC substrate is doped with Ga using a laser doping technique. The Ga atoms produce an acceptor level of 0.30 eV which corresponds to the MWIR wavelength of 4.21 mu m. Photons of this wavelength excite electrons from the valence band to the acceptor level, thereby modifying the electron density, refractive index, and reflectance of the substrate. This change in reflectance constitutes the detector response. The dynamics of the detector response are studied by placing a chopper at a constant angular velocity between the MWIR radiation source and the detector. The imaging capability of the detector is established by reflecting incoherent light at a wavelength of 633 nm, which is produced by projecting illumination from a light-emitting diode (LED) off the detector towards a CMOS camera and examining the digital output of the camera to determine the relative intensity of the incident radiation. In addition, a mathematical model is presented to analyze the dynamic response and determine the electron density and lifetime in the acceptor level.
C1 [Zeller, John; Manzur, Tariq] USN, Undersea Warfare Ctr, 1176 Howell St, Newport, RI 02841 USA.
[Kar, Aravinda] Univ Cent Florida, Coll Optic & Photon, Ctr Res & Educ Optic & Lasers CREOL, Dept Mech, Orlando, FL 32816 USA.
RP Zeller, J (reprint author), USN, Undersea Warfare Ctr, 1176 Howell St, Newport, RI 02841 USA.
FU Undersea Warfare Electromagnetic Systems Development Program, Newport,
RI, USA
FX This research was partially supported by the Undersea Warfare
Electromagnetic Systems Development Program, Newport, RI, USA.
NR 15
TC 0
Z9 0
U1 1
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9281-4
J9 PROC SPIE
PY 2012
VL 8540
AR 854007
DI 10.1117/12.2009521
PG 9
WC Remote Sensing; Optics
SC Remote Sensing; Optics
GA BDH73
UT WOS:000313292600004
ER
PT S
AU Shaw, JL
Yater, JE
Jensen, KL
Pate, BB
Hanna, JM
Feygelson, TI
AF Shaw, J. L.
Yater, J. E.
Jensen, K. L.
Pate, B. B.
Hanna, J. M.
Feygelson, T. I.
GP IEEE
TI Development of a diamond transmitted secondary electron source
SO 2012 25TH INTERNATIONAL VACUUM NANOELECTRONICS CONFERENCE (IVNC)
SE International Vacuum Nanoelectronics Conference
LA English
DT Proceedings Paper
CT 25th International Vacuum Nanoelectronics Conference (IVNC)
CY JUL 09-13, 2012
CL Jeju Island, SOUTH KOREA
SP IEEE, Korea Univ, Inst Nanotechnol, Korea Univ, WCU Flexible Nanosyst Grp, Korea Univ, BK21 Informat Technol Div, Elect & Telecommun Res Inst (ETRI), Korean Informat Display Soc (KIDS), Korean Carbon Soc, Electron Devices Soc (EDS), AVS
DE diamond; NEA; electron beam amplifier
ID SINGLE-CRYSTAL
AB We are developing a vacuum electron source using electrons transmitted through thin films of diamond. Calculations suggest this cold electron source is capable of providing total average currents in excess of 1A as well as energy spread below 0.5 eV and current densities roughly 100 times higher than conventional dispenser cathodes. We are growing diamond films with excellent quality and developing fabrication and processing methods required to create a transmitted secondary electron source.
C1 [Shaw, J. L.; Yater, J. E.; Jensen, K. L.; Pate, B. B.] USN, Res Lab, Washington, DC 20375 USA.
[Hanna, J. M.] Beam Wave Res, Silver Spring, MD USA.
[Feygelson, T. I.] SAIC McLean, McLean, VA USA.
RP Shaw, JL (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM jon.shaw@nrl.navy.mil
RI Jensen, Kevin/I-1269-2015; Pate, Bradford/B-4752-2010
OI Jensen, Kevin/0000-0001-8644-1680; Pate, Bradford/0000-0002-3288-2947
NR 7
TC 0
Z9 0
U1 0
U2 4
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
SN 2164-2370
BN 978-1-4673-1983-6; 978-1-4673-1982-9
J9 INT VACUUM NANOELECT
PY 2012
BP 56
EP +
PG 2
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BDD81
UT WOS:000312875600017
ER
PT J
AU Lee, G
Bertino, E
Rubin, S
Khoshgoftaar, TM
Thuraisingham, B
McCaffrey, J
AF Lee, Gordon
Bertino, Elisa
Rubin, Stuart
Khoshgoftaar, Taghi M.
Thuraisingham, Bhavani
McCaffrey, James
BE Zhang, C
Joshi, J
Bertino, E
Thuraisingham, B
TI Panel: Using Information Re-Use and Integration Principles in Big Data
SO 2012 IEEE 13TH INTERNATIONAL CONFERENCE ON INFORMATION REUSE AND
INTEGRATION (IRI)
LA English
DT Proceedings Paper
CT 13th IEEE International Conference on Information Reuse and Integration
(IEEE IRI) / DIM / WICSOC / IEEE EM- RITE / IRI-HI
CY AUG 08-10, 2012
CL Las Vegas, NV
SP IEEE Syst Man & Cybernet Soc (IEEE SMC), Soc Informat Reuse & Integrat (SIRI), IEEE
C1 [Lee, Gordon] San Diego State Univ, San Diego, CA 92182 USA.
[Bertino, Elisa] Purdue Univ, W Lafayette, IN 47907 USA.
[Rubin, Stuart] US Navy, SSC PAC, Washington, DC USA.
[Khoshgoftaar, Taghi M.] Florida Atlantic Univ, Boca Raton, FL 33431 USA.
[Thuraisingham, Bhavani] Univ Texas Dallas, Dallas, TX USA.
[McCaffrey, James] Microsoft, Redmond, WA USA.
RP Lee, G (reprint author), San Diego State Univ, San Diego, CA 92182 USA.
NR 0
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-2284-3
PY 2012
BP XXVI
EP XXVI
PG 1
WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BDC08
UT WOS:000312540300004
ER
PT S
AU Ngo, H
Shafer, J
Ives, R
Rakvic, R
Broussard, R
AF Ngo, Hau
Shafer, Jennifer
Ives, Robert
Rakvic, Ryan
Broussard, Randy
GP IEEE
TI Real Time Iris Segmentation on FPGA
SO 2012 IEEE 23RD INTERNATIONAL CONFERENCE ON APPLICATION-SPECIFIC SYSTEMS,
ARCHITECTURES AND PROCESSORS (ASAP)
SE IEEE International Conference on Application-Specific Systems
Architectures and Processors
LA English
DT Proceedings Paper
CT 23rd IEEE International Conference on Application-Specific Systems,
Architectures and Processors (ASAP)
CY JUL 09-11, 2012
CL Delft Univ Technol, Delft, NETHERLANDS
SP IEEE, IEEE Comp Soc, Maxeler Technologies, Synopsys
HO Delft Univ Technol
DE iris segmentation; iris recognition; Canny edge detection; on-chip
buffering; pipeline and parallel architecture; FPGA-based real time
processing
ID ALGORITHM
AB In this paper, a real time FPGA-based iris segmentation system is presented. The segmentation method implements the Canny edge detection algorithm and a circle search to detect an iris in an image or video frame. The proposed high performance architecture utilizes on-chip memory to significantly improve the throughput of the pipelined and parallel structure. A data forwarding technique is incorporated in the design to efficiently utilize the FPGA's embedded resources. The proposed architecture demonstrates a high speed processing capability that will facilitate the use of dedicated hardware to support an iris recognition application for large databases.
C1 [Ngo, Hau; Shafer, Jennifer; Ives, Robert; Rakvic, Ryan] USN Acad, Dept Elect & Comp Engn, Annapolis, MD 21402 USA.
[Broussard, Randy] USN Acad, Weap & Syst Engn Dept, Annapolis, MD 21402 USA.
RP Ngo, H (reprint author), USN Acad, Dept Elect & Comp Engn, Annapolis, MD 21402 USA.
EM ngo@usna.edu; shafer@usna.edu; ives@usna.edu; rakvic@usna.edu;
broussar@usna.edu
NR 17
TC 2
Z9 2
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1063-6862
BN 978-0-7695-4768-8
J9 IEEE INT CONF ASAP
PY 2012
BP 1
EP 7
PG 7
WC Computer Science, Hardware & Architecture; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BDD03
UT WOS:000312737700004
ER
PT B
AU Fischer, TC
Crenshaw, DM
Kraemer, SB
Schmitt, HR
Turner, TJ
AF Fischer, Travis C.
Crenshaw, D. M.
Kraemer, S. B.
Schmitt, H. R.
Turner, T. J.
BE Chartas, G
Hamann, F
Leighly, KM
TI AGN Narrow-Line Kinematics: Determining Inclinations via Outflows
SO AGN WINDS IN CHARLESTON
SE Astronomical Society of the Pacific Conference Series
LA English
DT Proceedings Paper
CT Conference on AGN Winds in Charleston
CY OCT 15-18, 2011
CL Coll Charleston, Charleston, SC
HO Coll Charleston
ID ACTIVE GALACTIC NUCLEI; MASS OUTFLOWS; DUSTY TORI; NGC 4151; REGION;
DISK; GAS
AB Active Galactic Nuclei (AGN) are axisymmetric systems in which their observed properties are strong functions of inclination with respect to our line of sight. However, except for a few special cases, the specific inclinations of individual AGN are unknown. We have developed a promising technique for determining the inclinations of nearby AGN by mapping the kinematics of their narrow-line regions (NLRs), which are easily resolved with Hubble Space Telescope (HST) [O III] imaging and long-slit spectra from STIS. Our studies indicate that NLR kinematics dominated by radial outflow can be fit with simple biconical outflow models that can be used to determine the inclination of the bicone axis, and hence the obscuring torus, with respect to our line of sight. Using inclinations determined from models of 17 individual AGN, we can for the first time assess the effect of inclination on other observable parameters in radio-quiet AGN, including the discovery of a distinct correlation between AGN inclination and X-ray column density. As our line of sight with respect to the bicone axis increases, the torus surrounding the AGN becomes closer to edge-on and we see a seamless increase in column density between Seyfert 1 and Seyfert 2 galaxies.
C1 [Fischer, Travis C.; Crenshaw, D. M.] Georgia State Univ, Dept Phys & Astron, Astron Off, 1 Pk Pl S SE,Suite 700, Atlanta, GA 30303 USA.
[Kraemer, S. B.] Cathol Univ Amer, Inst Astrophys & Computat Sci Dept Phys, Washington, DC 20064 USA.
[Schmitt, H. R.] Naval Res Lab, Comp Phys, Springfield, VA 22151 USA.
[Turner, T. J.] Univ Maryland, Dept Astron, Baltimore, MD 21250 USA.
RP Fischer, TC (reprint author), Georgia State Univ, Dept Phys & Astron, Astron Off, 1 Pk Pl S SE,Suite 700, Atlanta, GA 30303 USA.
EM fischer@chara.gsu.edu; kraemer@cua.edu; tjturner@umbc.edu
NR 15
TC 0
Z9 0
U1 0
U2 1
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-802-2
J9 ASTR SOC P
PY 2012
VL 460
BP 154
EP +
PG 2
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BDA26
UT WOS:000312277500041
ER
PT J
AU Brown, TS
Elster, EA
Stevens, K
Graybill, JC
Gillern, S
Phinney, S
Salifu, MO
Jindal, RM
AF Brown, Trevor S.
Elster, Eric A.
Stevens, Kristin
Graybill, J. Christopher
Gillern, Suzanne
Phinney, Samuel
Salifu, Moro O.
Jindal, Rahul M.
TI Bayesian Modeling of Pretransplant Variables Accurately Predicts Kidney
Graft Survival
SO AMERICAN JOURNAL OF NEPHROLOGY
LA English
DT Article
DE Renal allograft; Kidney transplant; United States Renal Data System;
Graft failure; Bayesian Belief Network; Multivariate analysis
ID NEURAL-NETWORK; TRANSPLANTATION; TECHNOLOGY; NOMOGRAMS; OUTCOMES; DONORS
AB Introduction: Machine learning can enable the development of predictive models that incorporate multiple variables for a systems approach to organ allocation. We explored the principle of Bayesian Belief Network (BBN) to determine whether a predictive model of graft survival can be derived using pretransplant variables. Our hypothesis was that pretransplant donor and recipient variables, when considered together as a network, add incremental value to the classification of graft survival. Methods: We performed a retrospective analysis of 5,144 randomly selected patients (age deceased donor kidney only, first-time recipients) from the United States Renal Data System database between 2000 and 2001. Using this dataset, we developed a machine-learned BBN that functions as a pretransplant organ-matching tool. Results: A network of 48 clinical variables was constructed and externally validated using an additional 2,204 patients of matching demographic characteristics. This model was able to predict graft failure within the first year or within 3 years (sensitivity 40%; specificity 80%; area under the curve, AUC, 0.63). Recipient BMI, gender, race, and donor age were amongst the pretransplant variables with strongest association to outcome. A 10-fold internal cross-validation showed similar results for 1-year (sensitivity 24%; specificity 80%; AUC 0.59) and 3-year (sensitivity 31%; specificity 80%; AUC 0.60) graft failure. Conclusion: We found recipient BMI, gender, race, and donor age to be influential predictors of outcome, while wait time and human leukocyte antigen matching were much less associated with outcome. BBN enabled us to examine variables from a large database to develop a robust predictive model.
C1 [Brown, Trevor S.; Elster, Eric A.; Stevens, Kristin; Graybill, J. Christopher; Gillern, Suzanne; Phinney, Samuel] USN, Med Res Ctr, Regenerat Med Dept, Silver Spring, MD USA.
[Stevens, Kristin] USN, San Diego Med Ctr, Dept Surg, San Diego, CA 92152 USA.
[Elster, Eric A.; Graybill, J. Christopher; Gillern, Suzanne; Phinney, Samuel; Jindal, Rahul M.] Walter Reed Natl Mil Med Ctr, Dept Surg, Bethesda, MD 20889 USA.
[Elster, Eric A.; Jindal, Rahul M.] Uniformed Serv Univ Hlth Sci, Dept Surg, Bethesda, MD 20814 USA.
[Salifu, Moro O.] SUNY Downstate Univ Hosp, Div Transplantat, New York, NY USA.
[Jindal, Rahul M.] George Washington Univ, Dept Med, Washington, DC USA.
RP Jindal, RM (reprint author), Walter Reed Natl Mil Med Ctr, Dept Gen Surg, Div Transplantat, 8901 Wisconsin Ave,Bldg 9,Room 1655, Bethesda, MD 20889 USA.
EM jindalr@msn.com
RI Brown, Trevor/K-4703-2012; Brown, Trevor/F-7392-2015
OI Brown, Trevor/0000-0001-7042-785X; Brown, Trevor/0000-0001-7042-785X
FU Health Resources and Services Administration [234-2005-37011C]
FX Additionally, this work was supported in part by Health Resources and
Services Administration contract 234-2005-37011C. The content is the
responsibility of the authors alone and does not necessarily reflect the
views or policies of the Department of Health and Human Services, nor
does mention of trade names, commercial products, or organizations imply
endorsement by the US Government.
NR 21
TC 5
Z9 5
U1 0
U2 2
PU KARGER
PI BASEL
PA ALLSCHWILERSTRASSE 10, CH-4009 BASEL, SWITZERLAND
SN 0250-8095
J9 AM J NEPHROL
JI Am. J. Nephrol.
PY 2012
VL 36
IS 6
BP 561
EP 569
DI 10.1159/000345552
PG 9
WC Urology & Nephrology
SC Urology & Nephrology
GA 062JN
UT WOS:000312916200010
PM 23221105
ER
PT J
AU Rutherford, B
Montgomery, MT
AF Rutherford, B.
Montgomery, M. T.
TI A Lagrangian analysis of a developing and non-developing disturbance
observed during the PREDICT experiment
SO ATMOSPHERIC CHEMISTRY AND PHYSICS
LA English
DT Article
ID SIZE LYAPUNOV EXPONENTS; COHERENT STRUCTURES; HYPERBOLIC TRAJECTORIES;
UNSTABLE MANIFOLDS; LOBE DYNAMICS; 2-DIMENSIONAL TURBULENCE;
VELOCITY-FIELDS; MEANDERING JET; FLUID EXCHANGE; POLAR VORTEX
AB The problem of tropical cyclone formation requires among other things an improved understanding of recirculating flow regions on sub-synoptic scales in a time evolving flow with typically sparse real-time data. This recirculation problem has previously been approached assuming as a first approximation both a layer-wise two-dimensional and nearly steady flow in a co-moving frame with the parent tropical wave or disturbance. This paper provides an introduction of Lagrangian techniques for locating flow boundaries that encompass regions of recirculation in time-dependent flows that relax the steady flow approximation.
Lagrangian methods detect recirculating regions from time-dependent data and offer a more complete methodology than the approximate steady framework. The Lagrangian reference frame follows particle trajectories so that flow boundaries which constrain particle transport can be viewed in a frame-independent setting. Finite-time Lagrangian scalar field methods from dynamical systems theory offer a way to compute boundaries from grids of particles seeded in and near a disturbance.
The methods are applied to both a developing and non-developing disturbance observed during the recent pre-depression investigation of cloud systems in the tropics (PREDICT) experiment. The data for this analysis is derived from global forecast model output that assimilated the dropsonde observations as they were being collected by research aircraft. Since Lagrangian methods require trajectory integrations, we address some practical issues of using Lagrangian methods in the tropical cyclogenesis problem. Lagrangian diagnostics are used to evaluate the previously hypothesized import of dry air into ex-Gaston, which did not re-develop into a tropical cyclone, and the exclusion of dry air from pre-Karl, which did become a tropical cyclone and later a major hurricane.
C1 [Rutherford, B.; Montgomery, M. T.] USN, Postgrad Sch, Monterey, CA USA.
RP Rutherford, B (reprint author), USN, Postgrad Sch, Monterey, CA USA.
EM bdruther@nps.edu
FU NSF [AGS-0733380, AGS-0851077]; NOAA's Hurricane Research Division in
Miami, FL; NASA [NNH09AK561, NNG09HG031]
FX We gratefully acknowledge the support of NSF AGS-0733380 and NSF
AGS-0851077, NOAA's Hurricane Research Division in Miami, FL, and NASA
grants NNH09AK561 and NNG09HG031. The viewpoints presented in this paper
are those of BR and MTM and do not necessarily represent the viewpoints
of the government funding agencies. We wish to thank Gerald Thomsen and
the German Weather Service, as well as Mark Boothe, for providing the
ECMWF data.
NR 48
TC 5
Z9 5
U1 1
U2 11
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 1680-7316
J9 ATMOS CHEM PHYS
JI Atmos. Chem. Phys.
PY 2012
VL 12
IS 23
BP 11355
EP 11381
DI 10.5194/acp-12-11355-2012
PG 27
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 058WK
UT WOS:000312665300009
ER
PT S
AU Cho, M
Corredor, A
Dribusch, C
Park, WH
Sheehan, M
Johns, M
Shectman, S
Kern, J
Hull, C
Kim, YS
Bagnasco, J
AF Cho, Myung
Corredor, Andrew
Dribusch, Christoph
Park, Won-Hyun
Sheehan, Michael
Johns, Matt
Shectman, Stephen
Kern, Jonathan
Hull, Charlie
Kim, Young-Soo
Bagnasco, John
BE Stepp, LM
Gilmozzi, R
Hall, HJ
TI Performance Prediction of the Fast Steering Secondary Mirror for the
Giant Magellan Telescope
SO GROUND-BASED AND AIRBORNE TELESCOPES IV
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Ground-Based and Airborne Telescopes IV
CY JUL 01-06, 2012
CL Amsterdam, NETHERLANDS
SP SPIE
DE Extremely large telescope; GMT Secondary Mirror; optimum configuration;
mirror support; image quality
AB The Giant Magellan Telescope (GMT) Fast-steering secondary mirror (FSM) is one of the GMT two Gregorian secondary mirrors. The FSM is 3.2 m in diameter and built as seven 1.1 m diameter circular segments conjugated 1: 1 to the seven 8.4m segments of the primary. A parametric study and optimization of the FSM mirror blank and central lateral flexure design were performed. For the optimized FSM configuration, the optical image qualities and structure functions for the axial and lateral gravity print-through cases, thermal gradient effects, and dynamic performances will be discussed. This paper reports performance predictions of the optimized FSM. To validate our lateral flexure design concept, mechanical and optical tests were conducted on test mirrors installed with two different lateral flexures.
C1 [Cho, Myung] Natl Opt Astron Observ, GSMT Program Off, 950 N Cherry Ave, Tucson, AZ 85719 USA.
[Corredor, Andrew; Dribusch, Christoph] Univ Arizona, Aerosp & Mech Engn Dept, Tucson, AZ 85721 USA.
[Park, Won-Hyun] Univ Arizona, Coll Optic Sci, Tucson, AZ 85721 USA.
[Sheehan, Michael; Johns, Matt; Shectman, Stephen; Kern, Jonathan; Hull, Charlie] GMT Project Off, Pasadena, CA 91001 USA.
[Kim, Young-Soo] Korea Astron & Space Sci Inst, Daejeon, South Korea.
[Bagnasco, John] Naval Postgraduate Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
RP Cho, M (reprint author), Natl Opt Astron Observ, GSMT Program Off, 950 N Cherry Ave, Tucson, AZ 85719 USA.
EM mcho@noao.edu
FU GMT
FX This research was carried out at the National Optical Astronomy
Observatory, and was sponsored in part by the GMT. The authors
gratefully acknowledge the support of the GMT Project Office. This work
was partially contributed by the scientists, engineers, and students
from KASI (KASI, KRISS, IAE, GIST) in Korea which is one of the key
partners of the GMT.
NR 9
TC 2
Z9 2
U1 0
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9145-9
J9 PROC SPIE
PY 2012
VL 8444
AR 844424
DI 10.1117/12.926374
PG 13
WC Astronomy & Astrophysics; Optics
SC Astronomy & Astrophysics; Optics
GA BDA16
UT WOS:000312276100071
ER
PT S
AU Johnson, TJ
Harding, AK
Venter, C
Grove, JE
AF Johnson, T. J.
Harding, A. K.
Venter, C.
Grove, J. E.
CA Fermi LAT Collaboration
Pulsar Timing Consortium
BE Aharonian, FA
Hofmann, W
Rieger, FM
TI Modeling the Pulse Profiles of Millisecond Pulsars in the Second LAT
Catalog of gamma-ray Pulsars
SO HIGH ENERGY GAMMA-RAY ASTRONOMY
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 5th International Meeting on High Energy Gamma-Ray Astronomy
CY JUL 09-13, 2012
CL Heidelberg, GERMANY
SP Max-Planck-Inst Nucl Phys (MPIK), Springer Verlag, ISEG, W-IE-NE-R GmbH
DE gamma rays: observations; pulsars: millisecond
ID AREA TELESCOPE; LIGHT CURVES; RADIO
AB Significant gamma-ray pulsations have been detected from similar to 40 millisecond pulsars (MSPs) using 3 years of sky-survey data from the Fermi LAT and radio timing solutions from across the globe. We have fit the radio and gamma-ray pulse profiles of these MSPs using geometric versions of slot gap and outer gap gamma-ray emission models and radio cone and core models. For MSPs with radio and gamma-ray peaks aligned in phase we also explore low-altitude slot gap gamma-ray models and caustic radio models. The best-fit parameters provide constraints on the viewing geometries and emission sites. While the exact pulsar magnetospheric geometry is unknown, we can use the increased number of known gamma-ray MSPs to look for significant trends in the population which average over these uncertainties.
C1 [Johnson, T. J.] Natl Acad Sci, Natl Res Council Res Associate, Washington, DC 20001 USA.
[Harding, A. K.] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA.
[Venter, C.] Northwest Univ, Ctr Space Res, Potchefstroom, South Africa.
[Grove, J. E.] Naval Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Johnson, TJ (reprint author), Natl Acad Sci, Natl Res Council Res Associate, Washington, DC 20001 USA.
EM tyrel.j.johnson@gmail.com
FU NASA; DOE in the United States; CEA/Irfu; IN2P3/CNRS in France; ASI;
INFN in Italy; MEXT; KEK; JAXA in Japan; Swedish Research Council and
the National Space Board in Sweden; INAF in Italy; CNES in France for
science analysis; NRL [NASA DPR S-15633-Y]
FX The Fermi LAT Collaboration acknowledges support from a number of
agencies and institutes for both development and the operation of the
LAT as well as scientific data analysis. These include NASA and DOE in
the United States, CEA/Irfu and IN2P3/CNRS in France, ASI and INFN in
Italy, MEXT, KEK, and JAXA in Japan, and the K. A. Wallenberg
Foundation, the Swedish Research Council and the National Space Board in
Sweden. Additional support from INAF in Italy and CNES in France for
science analysis during the operations phase is also gratefully
acknowledged. Portions of this research performed at NRL are sponsored
by NASA DPR S-15633-Y.
NR 12
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-1123-4
J9 AIP CONF PROC
PY 2012
VL 1505
BP 325
EP 328
DI 10.1063/1.4772263
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BDB83
UT WOS:000312503500050
ER
PT S
AU Gasparrini, D
Cavazzuti, E
Cutini, S
Dermer, CD
Lott, B
AF Gasparrini, D.
Cavazzuti, E.
Cutini, S.
Dermer, C. D.
Lott, B.
CA Fermi-LAT Collaboration
BE Aharonian, FA
Hofmann, W
Rieger, FM
TI The Second Fermi-LAT AGN catalogue
SO HIGH ENERGY GAMMA-RAY ASTRONOMY
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 5th International Meeting on High Energy Gamma-Ray Astronomy
CY JUL 09-13, 2012
CL Heidelberg, GERMANY
SP Max-Planck-Inst Nucl Phys (MPIK), Springer Verlag, ISEG, W-IE-NE-R GmbH
DE catalogs; galaxies: active; gamma rays: observations
AB The second catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope (LAT) in two years of scientific operation is presented. The Second LAT AGN Catalog (2LAC) includes 1017 gamma-ray sources located at high Galactic latitudes (vertical bar b vertical bar > 10deg) that are detected with a test statistic (TS) greater than 25 and associated statistically with AGNs. Consequently we define a Clean sample which includes 886 AGNs, comprising 395 BL Lacertae objects (BL Lacs), 310 flat-spectrum radio quasars (FSRQs), 157 candidate blazars of unknown type (i.e., with broad-band blazar characteristics but with no optical spectral measurement yet), eight misaligned AGNs, four narrow-line Seyfert 1 (NLS1s), 10 AGNs of other types and two starburst galaxies. The full characterization of the newly detected sources will require more broad-band data. Various properties, such as gamma-ray fluxes and photon power law spectral indices, redshifts are presented and discussed for the different blazar classes. The general trends observed in 1LAC are confirmed.
C1 [Gasparrini, D.; Cavazzuti, E.; Cutini, S.] ESRIN, ASDC, ASI Sci Data Ctr, Frascati, Italy.
[Cavazzuti, E.; Dermer, C. D.] INAF, Osservatorio astronomico Roma, Rome, Italy.
[Dermer, C. D.] Div Space Sci, Naval Res Lab, Washington, DC 20375 USA.
[Lott, B.] Univ Bordeaux, CNRS, CENBG, F-33175 Gradignan, France.
RP Gasparrini, D (reprint author), ESRIN, ASDC, ASI Sci Data Ctr, Frascati, Italy.
OI Cutini, Sara/0000-0002-1271-2924; Gasparrini, Dario/0000-0002-5064-9495
FU INAF; CNES
FX Additional support from INAF in Italy and CNES in France for science
analysis during the operations phase is also gratefully acknowledged.
NR 9
TC 1
Z9 1
U1 2
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-1123-4
J9 AIP CONF PROC
PY 2012
VL 1505
BP 478
EP 481
DI 10.1063/1.4772301
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BDB83
UT WOS:000312503500088
ER
PT B
AU Brooks, DH
Warren, HP
AF Brooks, David H.
Warren, Harry P.
BE Sekii, T
Watanabe, T
Sakurai, T
TI Constraints on the Heating Time Scale in Active Regions
SO HINODE-3: THE 3RD HINODE SCIENCE MEETING
SE Astronomical Society of the Pacific Conference Series
LA English
DT Proceedings Paper
CT 3rd Hinode Science Meeting
CY DEC 01-04, 2009
CL Tokyo, JAPAN
ID EMISSION-MEASURE PROFILES; EUV IMAGING SPECTROMETER;
EXTREME-ULTRAVIOLET; CORONAL LOOPS; MOSS; TRACE; BRIGHTENINGS;
TEMPERATURE; HINODE
AB Understanding the heating time scale is important for constraining models of active region emission. Hinode observations of moss at the bases of high temperature active region core loops are allowing us to study this problem in unprecedented detail. Here we discuss some of our recent results studying the variability of moss properties such as intensity, magnetic flux. Doppler and non-thermal velocity. We find that most of these quantities are relatively constant. One interpretation is that the heating is therefore effectively steady, i.e., heating events occur with a rapid repetition rate. Alternatively, the heating could be low frequency, but only if it occurs on sub-resolution spatial scales.
C1 [Brooks, David H.; Warren, Harry P.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Brooks, DH (reprint author), USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
NR 17
TC 0
Z9 0
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-790-2
J9 ASTR SOC P
PY 2012
VL 454
BP 189
EP 192
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BDA28
UT WOS:000312283700041
ER
PT B
AU Vourlidas, A
AF Vourlidas, Angelos
BE Sekii, T
Watanabe, T
Sakurai, T
TI Science Highlights from the First Three Years of CME Observations from
STEREO/SECCHI
SO HINODE-3: THE 3RD HINODE SCIENCE MEETING
SE Astronomical Society of the Pacific Conference Series
LA English
DT Proceedings Paper
CT 3rd Hinode Science Meeting
CY DEC 01-04, 2009
CL Tokyo, JAPAN
ID SOLAR-CYCLE; MASS; SECCHI
AB Since early 2007, the SECCH I experiment aboard the STEREO mission has been observing the Sun and the heliosphere from two varying vantage points using EUV disk imagers, coronagraphs and heliospheric imagers. Despite the prolonged solar minimum, the unprecedented coverage of solar eruptions from the low corona to beyond I AU is providing many new and fundamental insights into the physics of CME formation, initiation and propagation. Here, I highlight a few key results and outline possible scientific synergies between the STEREO and the Hinode payloads.
C1 USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RP Vourlidas, A (reprint author), USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RI Vourlidas, Angelos/C-8231-2009
OI Vourlidas, Angelos/0000-0002-8164-5948
NR 11
TC 0
Z9 0
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-790-2
J9 ASTR SOC P
PY 2012
VL 454
BP 367
EP 374
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BDA28
UT WOS:000312283700081
ER
PT S
AU Cooper, KP
Wachter, RF
AF Cooper, Khershed P.
Wachter, Ralph F.
BE Postek, MT
Coleman, VA
Orji, NG
TI High-rate, Roll-to-Roll Nanomanufacturing of Flexible Systems
SO INSTRUMENTATION, METROLOGY, AND STANDARDS FOR NANOMANUFACTURING, OPTICS,
AND SEMICONDUCTORS VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Instrumentation, Metrology, and Standards for
Nanomanufacturing, Optics, and Semiconductors VI
CY AUG 13-14, 2012
CL San Diego, CA
SP SPIE
DE Nanomaterials; nanomanufacturing; flexible electronics; system-on-film;
roll-to-roll
ID FUEL-CELLS
AB Since the National Nanotechnology Initiative was first announced in 2000, nanotechnology has developed an impressive catalog of nano-scale structures with building-blocks such as nanoparticles, nanotubes, nanorods, nanopillars, and quantum dots. Similarly, there are accompanying materials processes such as, atomic layer deposition, pulsed layer deposition, nanoprinting, nanoimprinting, transfer printing, nanolithography and nanopatterning. One of the challenges of nanomanufacturing is scaling up these processes reliably and affordably. Roll-to-roll manufacturing is a means for scaling up, for increasing throughput. It is high-speed production using a continuous, moving platform such as a web or a flexible substrate. The adoption of roll-to-roll to nanomanufacturing is novel. The goal is to build structures and devices with nano-scale features and specific functionality. The substrate could be a polymer, metal foil, silk, cloth or paper. The materials to build the structures and multi-level devices could be organic, inorganic or biological. Processing could be solution-based, e. g., ink-jet printing, or vacuum-based, e. g., chemical vapor deposition. Products could be electronics, optoelectronics, membranes, catalysts, microfluidics, lab-on-film, filters, etc. By this means, processing of large and conformal areas is achievable. High-throughput translates into low cost, which is the attraction of roll-to-roll nanomanufacturing. There are technical challenges requiring fundamental scientific advances in materials and process development and in manufacturing and system-integration where achieving nano-scale feature size, resolution and accuracy at high speeds can be major hurdles. We will give an overview of roll-to-roll nanomanufacturing with emphasis on the need to understand the material, process and system complexities, the need for instrumentation, measurement, and process control and describe the concept of cyber-enabled nanomanufacturing for reliable and predictable production.
C1 [Cooper, Khershed P.] Naval Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
[Wachter, Ralph F.] Natl Sci Fdn, Arlington, VA 22230 USA.
RP Cooper, KP (reprint author), Naval Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM khershed.cooper@nrl.navy.mil
NR 12
TC 0
Z9 0
U1 1
U2 21
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9183-1
J9 PROC SPIE
PY 2012
VL 8466
AR 846602
DI 10.1117/12.940775
PG 7
WC Nanoscience & Nanotechnology; Instruments & Instrumentation; Optics
SC Science & Technology - Other Topics; Instruments & Instrumentation;
Optics
GA BDE68
UT WOS:000312962300002
ER
PT J
AU Moses, WJ
Philpot, WD
AF Moses, Wesley J.
Philpot, William D.
TI Evaluation of atmospheric correction using bi-temporal hyperspectral
images
SO ISRAEL JOURNAL OF PLANT SCIENCES
LA English
DT Article
DE atmospheric correction; hyperspectral; Pseudo-Invariant Features (PIFs);
MODTRAN; 6S; FLAASH; TAFKAA_6S; Bidirectional Reflectance Distribution
Function (BRDF); anisotropy index (ANIX)
ID OCEAN COLOR; LANDSAT TM; RADIOMETRIC NORMALIZATION; MULTIPLE-SCATTERING;
REFLECTANCE; ALGORITHM; MODTRAN4; MAD; UPGRADES; FEATURES
AB Atmospheric correction of hyperspectral image data is frequently a requirement for using remote sensing to understand and quantify various phenomena that take place on the Earth. This is particularly true when the analysis requires the use of spectral reflectance. Although sophisticated models exist that can be used to perform atmospheric correction, evaluating the performance of these procedures is non-trivial. In this study, two atmospheric correction programs, FLAASH (based on MODTRAN 4), and TAFKAA_6S (based on 6S), were applied to a pair of images of the same area but collected six weeks apart. The results of the two atmospheric correction procedures are analyzed based on the expected stability of pseudo-invariant features (PIFs). Although both procedures performed rather well in terms of removing atmospheric absorption features in the infrared region, the analysis identified some anomalous behaviors as well, the most important of which appears to be related to the bidirectional reflectance distribution of the forest pixels selected as PIFs.
C1 [Moses, Wesley J.] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
[Philpot, William D.] Cornell Univ, Sch Civil & Environm Engn, Ithaca, NY 14850 USA.
RP Moses, WJ (reprint author), USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA.
EM wesley.moses@nrl.navy.mil
OI Moses, Wesley/0000-0003-3551-6093; Philpot, William/0000-0002-5283-4774
FU National Research Council; American Society for Engineering Education
Senior Faculty Fellowship
FX This work was supported in part by the National Research Council
Research Associateship awarded to W.J. Moses and the American Society
for Engineering Education Senior Faculty Fellowship awarded to W. D.
Philpot.
NR 45
TC 1
Z9 2
U1 3
U2 12
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND
SN 0792-9978
EI 2223-8980
J9 ISR J PLANT SCI
JI Isr. J. Plant Sci.
PY 2012
VL 60
IS 1-2
BP 253
EP 263
DI 10.1560/IJPS.60.1-2.253
PG 11
WC Plant Sciences
SC Plant Sciences
GA 060JO
UT WOS:000312773500020
ER
PT S
AU Cleveland, ER
Glembocki, O
Prokes, SM
AF Cleveland, Erin R.
Glembocki, Orest
Prokes, S. M.
BE Kobayashi, NP
Talin, AA
Islam, MS
TI Plasma-enhanced atomic layer deposition of silver thin films for
applications in plasmonics and surface-enhanced Raman scattering
SO NANOEPITAXY: MATERIALS AND DEVICES IV
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Nanoepitaxy - Materials and Devices IV
CY AUG 15-16, 2012
CL San Diego, CA
SP SPIE
DE plasma-enhanced atomic layer deposition; SERS; anodic aluminum oxide;
plasmonic; silver
ID ANODIC ALUMINA; SPECTROSCOPY
AB We have employed plasma-enhanced atomic layer deposition (PEALD) as a means to create multi-layered nano-composite structures in order to enhance the plasmonic behavior and SERS response in the detection of benzenethiol (BZT). Ag PEALD films were deposited within nanoporous anodic aluminum oxide (AAO) templates of various pore depths, using Ag(fod)(PEt3)(fod= 2,2-dimethyl-6,6,7,7,8,8,8-heptafluorooctane-3,5-dionato) as the precursor. We have examined the polycrystalline microstructure and conformality of the Ag films across the surface of an AAO template as well as into the pores, which varies significantly as thicknesses decrease. Furthermore, we investigated the plasmonic behavior of these films by performing SERS as a function of the Ag microstructure and conformality within the nanopores, using a 785 nm laser excitation and BZT as a test molecule, which forms a self-assembled monolayer on the Ag surface.
C1 [Cleveland, Erin R.] USN, Res Lab, Washington, DC 20375 USA.
[Glembocki, Orest; Prokes, S. M.] South Naval Res Lab, Electron Sci & Technol, Washington, DC 20375 USA.
RP Cleveland, ER (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM erin.cleveland.ctr@nrl.navy.mil
NR 23
TC 0
Z9 0
U1 4
U2 24
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9184-8
J9 PROC SPIE
PY 2012
VL 8467
AR 84670H
DI 10.1117/12.929033
PG 6
WC Nanoscience & Nanotechnology; Optics
SC Science & Technology - Other Topics; Optics
GA BDE69
UT WOS:000312962700006
ER
PT S
AU Prokes, SM
Glembocki, OJ
Cleveland, E
AF Prokes, S. M.
Glembocki, O. J.
Cleveland, E.
BE Kobayashi, NP
Talin, AA
Islam, MS
TI Novel Optical Properties of Ag films deposited by Plasma Enhanced Atomic
Layer Deposition (PEALD)
SO NANOEPITAXY: MATERIALS AND DEVICES IV
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Nanoepitaxy - Materials and Devices IV
CY AUG 15-16, 2012
CL San Diego, CA
SP SPIE
DE ALD; plasmonics; Raman spectroscopy; SERS
ID NANOSPHERE LITHOGRAPHY; SILVER NANOPARTICLES; SPECTROSCOPY
AB We have deposited Ag metal via plasma enhanced atomic layer deposition (PEALD) and we investigated the novel optical behavior of this material. We have found that as-deposited flat PEALD Ag films exhibit unexpected plasmonic properties and the plasmonic enhancement can differ markedly, depending on the microstructure of the Ag film and the substrate. Electromagnetic field simulations indicate that this plasmonic behavior is due to air gaps that are an inherent property of the mosaic-like microstructure of the PEALD-grown Ag film. We also show that this material is plasmonic by itself. We have also investigated the effect of substrate on the plasmonic enhancement, as well deposition on fabric, which results in a flexible plasmonic material.
C1 [Prokes, S. M.; Glembocki, O. J.; Cleveland, E.] USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
RP Prokes, SM (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
FU precursor synthesis; ONR
FX The authors would like to thank Ed Foos for help with the precursor
synthesis and ONR for funding support.
NR 13
TC 1
Z9 1
U1 2
U2 18
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9184-8
J9 PROC SPIE
PY 2012
VL 8467
AR 84670F
DI 10.1117/12.970437
PG 12
WC Nanoscience & Nanotechnology; Optics
SC Science & Technology - Other Topics; Optics
GA BDE69
UT WOS:000312962700005
ER
PT S
AU deRada, S
Ladner, S
Arnone, RA
AF deRada, Sergio
Ladner, Sherwin
Arnone, Robert A.
BE Bostater, CR
Mertikas, SP
Neyt, X
Nichol, C
Cowley, DC
Bruyant, JP
TI Coupling ocean models and satellite derived optical fields to estimate
LIDAR penetration and detection performance
SO REMOTE SENSING OF THE OCEAN, SEA ICE, COASTAL WATERS, AND LARGE WATER
REGIONS 2012
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Remote Sensing of the Ocean, Sea Ice, Coastal Waters and
Large Water Regions
CY SEP 26-27, 2012
CL Edinburgh, SCOTLAND
SP SPIE, SELEX GALILEO, THALES
DE LIDAR; Attenuation Length; Optical Depth; Penetration Depth; Mixed
Layer; Gulf of Mexico
ID ATTENUATION COEFFICIENT
AB A global-scale climatological assessment of the temporal and spatial relationships between physical and optical ocean layers was previously performed to determine LIDAR efficiency for measuring the 3D Ocean. That effort provided estimates of laser sensor penetration depth (PD) in the global oceans and identified critical coupling between Mixed Layer Depth (MLD) and Optical Depth (OD) based on potential laser power and ensuing attenuation. We make use of a Bio-Physical ocean model configured for the Gulf of Mexico (GOM) along with remotely sensed satellite measurements to examine LIDAR performance in the Gulf of Mexico coastal regions. The 4Km GOM ocean model runs in near-real-time and produces physical and bio-optical fields which are coupled to in-house derived satellite bio-optical products such as the Diffuse Attenuation Coefficient at 490 nm (Kd(490)). PD and MLD are coupled to determine laser power efficiency rates across multiple attenuation lengths. The results illustrate the potential utilization of space-borne oceanographic LIDAR to penetrate through the water column, elucidating its applicability for a variety of scientific (characterization of the ocean subsurface layers) and applied (target detection) objectives.
C1 [deRada, Sergio; Ladner, Sherwin] USN, Res Lab, Stennis Space Ctr, Stennis Space Ctr, MS 39529 USA.
[Arnone, Robert A.] Univ Southern Mississippi, Stennis Space Ctr, Stennis Space Ctr, MS 39529 USA.
RP deRada, S (reprint author), USN, Res Lab, Stennis Space Ctr, Stennis Space Ctr, MS 39529 USA.
EM derada@nrlssc.navy.mil
NR 15
TC 2
Z9 2
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9272-2
J9 PROC SPIE
PY 2012
VL 8532
AR 85320T
DI 10.1117/12.2007323
PG 8
WC Remote Sensing; Optics
SC Remote Sensing; Optics
GA BDD80
UT WOS:000312874500026
ER
PT J
AU Carr, W
Eonta, S
Tate, C
Kamimori, G
AF Carr, W.
Eonta, S.
Tate, C.
Kamimori, G.
TI EFFECTS OF EXTENDED WAKEFULNESS OBSERVED DURING SPECIALIZED MILITARY
TRAINING
SO SLEEP
LA English
DT Meeting Abstract
CT Annual Meeting of the Associated-Professional-Sleep-Societies (APSS)
CY JUN 09-13, 2012
CL Boston, MA
SP Associated Professi Sleep Soc (APSS)
C1 [Carr, W.; Eonta, S.] USN, Med Res Ctr, Silver Spring, MD USA.
[Tate, C.] New Zealand Def Force, Auckland, New Zealand.
[Kamimori, G.] Walter Reed Army Inst Res, Silver Spring, MD USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER ACAD SLEEP MEDICINE
PI WESTCHESTER
PA ONE WESTBROOK CORPORATE CTR, STE 920, WESTCHESTER, IL 60154 USA
SN 0161-8105
J9 SLEEP
JI Sleep
PY 2012
VL 35
SU S
MA 0213
BP A77
EP A77
PG 1
WC Clinical Neurology; Neurosciences
SC Neurosciences & Neurology
GA 063KH
UT WOS:000312996500215
ER
PT S
AU Tsao, MA
Ngo, HT
Anderson, CR
Sadilek, AC
Pisacane, VL
Giovane, F
Corsaro, R
Burchell, MJ
Stansberry, EG
Liou, JC
AF Tsao, Michael A.
Ngo, Hau T.
Anderson, Christopher R.
Sadilek, Albert C.
Pisacane, Vincent L.
Giovane, Frank
Corsaro, Robert
Burchell, Mark J.
Stansberry, Eugene G.
Liou, Jer-Chyi
GP IEEE
TI Prototyping and Testing a Debris Resistive Acoustic Grid Orbital Navy
Sensor
SO 2012 IEEE INTERNATIONAL INSTRUMENTATION AND MEASUREMENT TECHNOLOGY
CONFERENCE (I2MTC)
SE IEEE Instrumentation and Measurement Technology Conference
LA English
DT Proceedings Paper
CT 29th Annual IEEE International Instrumentation and Measurement
Technology Conference (I2MTC)
CY MAY 13-16, 2012
CL Graz, AUSTRIA
SP IEEE, IEEE Instrumentat & Measurement Soc, IEEE Austria Sect, TU Graz, Virtual Vehicle Competence Ctr, Obuda Univ, European Acad Sci & Arts, Austrian Acad Sci, Int Soc Petr Engineers, Drilling Syst Automat Tech Sect, Arbeitskreis Hochschullehrer Messtechnik e.V. (AHMT), Joanneum Res, Austrian Ctr Competence Mechatron (ACCM), Platform Artemis Austria
AB The Debris Resistive Acoustic Grid Orbital Navy Sensor (DRAGONS) is a spacecraft-mounted instrument designed to detect microscopic sized particles in polar and sun-synchronous orbits at 800-900 km which are currently undetectable by ground-based systems. Current orbital debris detection systems are dependent on ground based radars, which only have the capabilities to detect particles with a characteristic size greater than 0.5-1 cm at ranges less than 1000-2000 km [2]. Microscopic orbital debris can travel at relative velocities of 14 km/sec, which have the ability to severely damage subsystems of spacecrafts [1]. DRAGONS will provide quantitative information on microscopic orbital debris by combining two systems for particle detection, an acoustic subsystem as the primary system and a resistive grid subsystem as the secondary system. The acoustic subsystem measures the characteristic waveforms of impacting particles at the surface of the spacecraft. This impact is then verified simultaneously using the resistive grid subsystem, which changes in resistance as resistive lines break due to impacts on the surface of the spacecraft. The goal of the DRAGONS project is to use low power and inexpensive equipment that will update current debris models that have not accounted for these microscopic sized particles.
C1 [Tsao, Michael A.; Ngo, Hau T.; Anderson, Christopher R.; Sadilek, Albert C.; Pisacane, Vincent L.] USN Acad, Annapolis, MD 21412 USA.
[Giovane, Frank] Virginia Tech Univ, Blacksburg, VA 24060 USA.
[Corsaro, Robert] Satera Def Solut, Washington, DC 20375 USA.
[Burchell, Mark J.] Univ Kent, Ctr Astrophy & Planetary Sci, Canterbury CT27NH, Kent, England.
[Stansberry, Eugene G.; Liou, Jer-Chyi] NASA, Johnson Space Ctr Orbital Debris Off, Houston, TX 77058 USA.
RP Tsao, MA (reprint author), USN Acad, Annapolis, MD 21412 USA.
OI Burchell, Mark/0000-0002-2680-8943
NR 2
TC 2
Z9 2
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1091-5281
BN 978-1-4577-1771-0
J9 IEEE IMTC P
PY 2012
BP 274
EP 279
PG 6
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA BCA46
UT WOS:000309449100054
ER
PT S
AU Huang, CF
Yang, TC
Liu, JY
Burchfield, T
Schindall, J
AF Huang, Chen-Fen
Yang, T. C.
Liu, Jin-Yuan
Burchfield, Tom
Schindall, Jeff
BE Zhou, J
Li, Z
Simmen, J
TI Ocean Current Mapping Using Networked Distributed Sensors
SO ADVANCES IN OCEAN ACOUSTICS
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 3rd International Conference on Ocean Acoustics (OA)
CY MAY 21-25, 2012
CL Beijing, PEOPLES R CHINA
SP U S Off Naval Res, Chinese Acad Sci (CAS), Natl Nat Sci Fdn China, Acoust Soc Amer, Chinese Soc Oceanography, Acoust Soc China, Chinese Acad Sci (CAS), Inst Acoust (IOA), State Key Lab Acoust, Georgia Inst Technol, Sch Mech Engn, Univ Washington, Appl Phys Lab
DE ocean acoustic tomography; current estimate; networked sensors
ID ACOUSTIC TOMOGRAPHY; STRAIT; MODEL
AB Distributed underwater sensors are expected to provide environmental (oceanographic) monitoring over large areas. As fabrication technology advances, low cost sensors will be available for many applications. The sensors communicate to each other and are networked using acoustic communications. This paper proposes a method for ocean current tomography using distributed networked sensors and presents preliminary experimental results by this approach. Conventional acoustic tomography uses the acoustic sensors distributed on the periphery of an area of interest. Environmental reconstruction requires solving a challenging high dimensional inverse problem, typically requiring substantial computational effort. Given distributed sensors, currents can be constructed locally based on data from neighboring sensors. It is shown using simulated data that results obtained by the proposed method are similar to those obtained by a conventional tomographic method based on peripheral sensors. In addition, one finds that the distributed sensors consume much less energy than that by the conventional tomographic approach. An acoustic communication and networking experiment was conducted near the Sizihwan Bay in Kaohsiung, Taiwan, in May 2011. The communication signals are analyzed to measure currents as a function of space and time. The procedure is simple and can be implemented in real-time using in-buoy processing.
C1 [Huang, Chen-Fen] Natl Taiwan Univ, Inst Oceanog, Taipei 10617, Taiwan.
[Yang, T. C.; Liu, Jin-Yuan] Natl Sun Yat Sen Univ, Inst Appl Marine Phys & Undersea Technol, Kaohsiung 80424, Taiwan.
[Liu, Jin-Yuan] Natl Taitung Univ, Taitung, Taiwan.
[Burchfield, Tom; Schindall, Jeff] Naval Res Lab, Washington, DC 20375 USA.
RP Huang, CF (reprint author), Natl Taiwan Univ, Inst Oceanog, Taipei 10617, Taiwan.
FU Office of Naval Research, USA; National Science Council of Taiwan
[101-2611-M-002-007, 101-2218-E-110-001]
FX This work is supported by the Office of Naval Research, USA, and
National Science Council of Taiwan through contracts 101-2611-M-002-007
& 101-2218-E-110-001.
NR 9
TC 0
Z9 0
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-1107-4
J9 AIP CONF PROC
PY 2012
VL 1495
BP 400
EP 407
DI 10.1063/1.4765935
PG 8
WC Acoustics; Instruments & Instrumentation; Physics, Applied
SC Acoustics; Instruments & Instrumentation; Physics
GA BDA04
UT WOS:000312258400032
ER
PT J
AU Samimi, A
Scales, WA
Bernhardt, PA
Briczinski, SJ
Selcher, CA
McCarrick, MJ
AF Samimi, A.
Scales, W. A.
Bernhardt, P. A.
Briczinski, S. J.
Selcher, C. A.
McCarrick, M. J.
TI On ion gyro-harmonic structuring in the stimulated electromagnetic
emission spectrum during second electron gyro-harmonic heating
SO ANNALES GEOPHYSICAE
LA English
DT Article
DE Ionosphere; Active experiments; Plasma waves and instabilities
ID DOWNSHIFTED PEAK; UPPER HYBRID; IONOSPHERE; FREQUENCY; INSTABILITY;
WAVES
AB Recent observations show that, during ionospheric heating experiments at frequencies near the second electron gyro-harmonic, discrete spectral lines separated by harmonics of the ion-gyro frequency appear in the stimulated electromagnetic emission (SEE) spectrum within 1 kHz of the pump frequency. In addition to the ion gyro-harmonic structures, on occasion, a broadband downshifted emission is observed simultaneously with these spectral lines. Parametric decay of the pump field into upper hybrid/electron Bernstein (UH/EB) and low-frequency ion Bernstein (IB) and oblique ion acoustic (IA) modes is considered responsible for generation of these spectral features. Guided by predictions of an analytical model, a two-dimensional particle-in-cell (PIC) computational model is employed to study the nonlinear processes during such heating experiments. The critical parameters that affect the spectrum, such as whether discrete gyroharmonic on broadband structures is observed, include angle of the pump field relative to the background magnetic field, pump field strength, and proximity of the pump frequency to the gyro-harmonic. Significant electron heating along the magnetic field is observed in the parameter regimes considered.
C1 [Samimi, A.; Scales, W. A.] Virginia Tech, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061 USA.
[Bernhardt, P. A.; Briczinski, S. J.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Selcher, C. A.] USAF, Res Lab, Kirtland, NM 87417 USA.
[McCarrick, M. J.] Marsh Creek LLC, Gakona, AK USA.
RP Samimi, A (reprint author), Virginia Tech, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061 USA.
EM arsamimi@vt.edu
FU National Science Foundation; NRL 6.1 base program; NRC postdoc program
FX The work at Virginia Tech is supported by the National Science
Foundation. The work at the Naval Research Laboratory was supported by
the NRL 6.1 base program. S. J. Briczinski is sponsored by the NRC
postdoc program.
NR 18
TC 8
Z9 8
U1 0
U2 6
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 0992-7689
J9 ANN GEOPHYS-GERMANY
JI Ann. Geophys.
PY 2012
VL 30
IS 11
BP 1587
EP 1594
DI 10.5194/angeo-30-1587-2012
PG 8
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 058WT
UT WOS:000312666300003
ER
PT J
AU Carman, JK
Rossiter, DL
Khelif, D
Jonsson, HH
Faloona, IC
Chuang, PY
AF Carman, J. K.
Rossiter, D. L.
Khelif, D.
Jonsson, H. H.
Faloona, I. C.
Chuang, P. Y.
TI Observational constraints on entrainment and the entrainment interface
layer in stratocumulus
SO ATMOSPHERIC CHEMISTRY AND PHYSICS
LA English
DT Article
ID CLOUD-TOP ENTRAINMENT; NOCTURNAL MARINE STRATOCUMULUS; MIXED LAYERS;
BOUNDARY-LAYER; INSTABILITY; INVERSION; INTERFEROMETRY; AIRCRAFT;
VELOCITY; PACIFIC
AB Aircraft sampling of the stratocumulus-topped boundary layer (STBL) during the Physics of Stratocumulus Top (POST) experiment was primarily achieved using sawtooth flight patterns, during which the atmospheric layer 100 m above and below cloud top was sampled at a frequency of once every 2 min. The large data set that resulted from each of the 16 flights document the complex structure and variability of this interfacial region in a variety of conditions. In this study, we first describe some properties of the entrainment interface layer (EIL), where strong gradients in turbulent kinetic energy (TKE), potential temperature and moisture can be found. We find that defining the EIL by the first two properties tends to yield similar results, but that moisture can be a misleading tracer of the EIL. These results are consistent with studies using large-eddy simulations. We next utilize the POST data to shed light on and constrain processes relevant to entrainment, a key process in the evolution of the STBL that to-date is not well-represented even by high resolution models. We define "entrainment efficiency" as the ratio of the TKE consumed by entrainment to that generated within the STBL (primarily by cloud-top cooling). We find values for the entrainment efficiency that vary by 1.5 orders of magnitude, which is even greater than the one order magnitude that previous modeling results have suggested. Our analysis also demonstrates that the entrainment efficiency depends on the strength of the stratification of the EIL, but not on the TKE in the cloud top region. The relationships between entrainment efficiency and other STBL parameters serve as novel observational contraints for simulations of entrainment in such systems.
C1 [Carman, J. K.; Rossiter, D. L.; Chuang, P. Y.] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
[Khelif, D.] Univ Calif Irvine, Irvine, CA USA.
[Jonsson, H. H.] USN, Postgrad Sch, Ctr Interdisciplinary Remotely Piloted Aircraft S, Monterey, CA USA.
[Faloona, I. C.] Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA.
RP Chuang, PY (reprint author), Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
EM pchuang@ucsc.edu
FU Physical Meteorology program of the National Science Foundation
[0736046]; NSF/Physical Meteorology
FX J. Carman, D. Rossiter and P. Chuang thank the Physical Meteorology
program of the National Science Foundation (#0736046) for their support
and encouragement for this project. D. Khelif also thanks NSF/Physical
Meteorology for supporting his effort. The authors are very grateful to
the CIRPAS Twin Otter pilots and technical staff for their hard work to
ensure that the flights were successful. We also thank the rest of the
POST science team, especially Herman Gerber, for their contributions and
discussions before, during and after the field campaign. Lastly, we
thank Rob Wood and Jonathan Petters for helpful discussions.
NR 36
TC 8
Z9 8
U1 0
U2 15
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 1680-7316
J9 ATMOS CHEM PHYS
JI Atmos. Chem. Phys.
PY 2012
VL 12
IS 22
BP 11135
EP 11152
DI 10.5194/acp-12-11135-2012
PG 18
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 055JG
UT WOS:000312411300033
ER
PT S
AU Prel, F
Moreau, L
Lantagne, S
Bullis, RD
Roy, C
Vallieres, C
Levesque, L
AF Prel, Florent
Moreau, Louis
Lantagne, Stephane
Bullis, Ritchie D.
Roy, Claude
Vallieres, Christian
Levesque, Luc
BE Kamerman, GW
Steinvall, O
Lewis, KL
Hollins, RC
Merlet, TJ
Gruneisen, MT
Dusek, M
Rarity, JG
Bishop, GJ
Gonglewski, J
TI Standoff Aircraft IR Characterization with ABB dual-band Hyper Spectral
Imager
SO ELECTRO-OPTICAL REMOTE SENSING, PHOTONIC TECHNOLOGIES, AND APPLICATIONS
VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Electro-Optical Remote Sensing, Photonic Technologies, and
Applications VI
CY SEP 24-26, 2012
CL Edinburgh, SCOTLAND
SP SPIE, SELEX GALILEO, THALES
AB Remote sensing infrared characterization of rapidly evolving events generally involves the combination of a spectro-radiometer and infrared camera(s) as separated instruments. Time synchronization, spatial coregistration, consistent radiometric calibration and managing several systems are important challenges to overcome; they complicate the target infrared characterization data processing and increase the sources of errors affecting the final radiometric accuracy.
MR-i is a dual-band Hyperspectal imaging spectro-radiometer, that combines two 256 x 256 pixels infrared cameras and an infrared spectro-radiometer into one single instrument. This field instrument generates spectral datacubes in the MWIR and LWIR. It is designed to acquire the spectral signatures of rapidly evolving events. The design is modular. The spectrometer has two output ports configured with two simultaneously operated cameras to either widen the spectral coverage or to increase the dynamic range of the measured amplitudes. Various telescope options are available for the input port.
Recent platform developments and field trial measurements performances will be presented for a system configuration dedicated to the characterization of airborne targets.
C1 [Prel, Florent; Moreau, Louis; Lantagne, Stephane; Roy, Claude; Vallieres, Christian; Levesque, Luc] ABB, Remote Sensing Grp, 585 Charest Blvd E,Suite 300, Quebec City, PQ G1K 9H4, Canada.
[Bullis, Ritchie D.] Patuxent River Infrared Signature Measurement P, Atlant Test Ranges Aircraft Signature Avion Measu, NAVAIR, Patuxent River, MD 20670 USA.
RP Prel, F (reprint author), ABB, Remote Sensing Grp, 585 Charest Blvd E,Suite 300, Quebec City, PQ G1K 9H4, Canada.
EM florent.m.prel@ca.abb.com
NR 5
TC 0
Z9 0
U1 0
U2 0
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9283-8
J9 PROC SPIE
PY 2012
VL 8542
AR 85422A
DI 10.1117/12.974775
PG 12
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BDA59
UT WOS:000312346500061
ER
PT J
AU Pizarro, M
Iturriaga, R
Silva, A
Gallegos, S
AF Pizarro, Marlene
Iturriaga, Rodolfo
Silva, Alejandro
Gallegos, Sonia
TI Unusual bloom of Tetraselmis sp in the Valparaiso Bay, Chile
SO GAYANA BOTANICA
LA Spanish
DT Article
ID RADIATION
AB A bloom of Tetraselmis sp. was observed during the first days of January of 2006 in the Valparaiso Bay (32 degrees 57'S; 71 degrees 33'W), producing green coloration of sea and exclusion of phytoplankton species. Previous blooms of Tetraselmis sp. have not been observed in this bay.
C1 [Pizarro, Marlene] Univ Valparaiso, Ctr Invest & Gest Recursos Nat, Fac Ciencias, Valparaiso, Chile.
[Iturriaga, Rodolfo] Univ So Calif, Dept Biol Sci, Los Angeles, CA 90089 USA.
[Silva, Alejandro] Pontificia Univ Catolica Valparaiso, Dept Oceanog Fis, Valparaiso, Chile.
[Gallegos, Sonia] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
RP Pizarro, M (reprint author), Univ Valparaiso, Ctr Invest & Gest Recursos Nat, Fac Ciencias, Gran Bretana 1111, Valparaiso, Chile.
EM manepizarro@gmail.com
NR 9
TC 0
Z9 0
U1 0
U2 2
PU EDICIONES UNIV, CONCEPCION
PI CONCEPCION
PA COMITE DE PUBLICACION, CASILLA 2407, CONCEPCION, 00000, CHILE
SN 0016-5301
J9 GAYANA BOT
JI Gayana Bot.
PY 2012
VL 69
IS 2
BP 369
EP 372
PG 4
WC Plant Sciences
SC Plant Sciences
GA 056CG
UT WOS:000312465400014
ER
PT S
AU Marr, KD
Englert, CR
Harlander, JM
AF Marr, Kenneth D.
Englert, Christoph R.
Harlander, John M.
BE Schmit, J
Creath, K
Towers, CE
Burke, J
TI Measurement and modeling of the thermal behavior of a laboratory DASH
interferometer
SO INTERFEROMETRY XVI: TECHNIQUES AND ANALYSIS
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Interferometry XVI - Techniques and Analysis
CY AUG 13-15, 2012
CL San Diego, CA
SP SPIE
DE Interferometry; fringe analysis; thermal drift; DASH interferometer
ID SPATIAL HETERODYNE SPECTROSCOPY; ATMOSPHERE RESEARCH SATELLITE; NM
EMISSION; WIND; DYNAMICS
AB A Doppler Asymmetric Spatial Heterodyne ( DASH) interferometer is a device that is suited to making line-of-sight measurements of thermospheric wind speeds from either ground-or space-based platforms. However, DASH interferometer characteristics are sensitive to temperature changes. These instrument changes can be tracked with calibration sources and subsequently corrected during data analysis. Even though these thermal effects can be corrected, a quantitative understanding of the physics driving them is important for future instrument designs. A previous study of the thermal behavior of a monolithic DASH system [Harlander et al, Opt. Express, 2010] measured a thermal response that was not consistent with a simplified model. It was suggested that this discrepancy was a result of the rotation of various optical components caused by the thermoelastic distortion of the monolithic interferometer elements which were cemented together yet had different coefficients of thermal expansion. This distortion effect was not included in the simplified model. In this study we assemble an interferometer with separate optical components which are allowed to expand independently with changes in temperature and therefore eliminates any distortion due to stresses induced by different coefficients of thermal expansion. Thus, by measuring the thermally induced change to the interference pattern generated by this interferometer, we may characterize the thermal behavior of the system and verify whether all the relevant physics is included in the simplified model. We find that the thermal drift measured by the experimental interferometer closely matches that predicted by the model. This important result will help in the material selection and overall design of future monolithic interferometers.
C1 [Marr, Kenneth D.] USN, Res Lab, NRC Associate Residence, Div Space Sci, Code 7630,4555 Overlook Ave SW, Washington, DC 20375 USA.
[Englert, Christoph R.] Naval Res Lab, Space Sci Div, Washington, DC 20375 USA.
[Harlander, John M.] St Cloud State Univ, Dept Phys, Toyono, Osaka 56301, Japan.
RP Marr, KD (reprint author), USN, Res Lab, NRC Associate Residence, Div Space Sci, Code 7630,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM kenneth.marr.ctr@nrl.navy.mil
OI Englert, Christoph/0000-0002-2145-6168
FU Office of Naval research
FX This work was supported by the Office of Naval research. The authors
would like to thank Pat Bell, Kevin Newsome, and Patrick Serengulian for
their time and support.
NR 14
TC 0
Z9 0
U1 1
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9210-4
J9 PROC SPIE
PY 2012
VL 8493
AR 849302
DI 10.1117/12.928984
PG 7
WC Optics; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy
SC Optics; Radiology, Nuclear Medicine & Medical Imaging; Spectroscopy
GA BCZ60
UT WOS:000312212400002
ER
PT J
AU Wang, J
Kalivoda, M
Guan, JY
Theodore, A
Sharby, J
Wu, CY
Paulson, K
Es-Said, O
AF Wang, Jun
Kalivoda, Mark
Guan, Jianying
Theodore, Alexandros
Sharby, Jessica
Wu, Chang-Yu
Paulson, Kathleen
Es-Said, Omar
TI Double Shroud Delivery of Silica Precursor for Reducing Hexavalent
Chromium in Welding Fume
SO JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE
LA English
DT Article
DE hexavalent chromium; silica precursor; welding fume
ID PARTICLE-SIZE DISTRIBUTION; TOXIC METAL EMISSIONS; SORBENT PRECURSORS;
EXPOSURE; GAS; REDUCTION; AEROSOLS; STEEL; NANOPARTICLES; VENTILATION
AB The welding process yields a high concentration of nanoparticles loaded with hexavalent chromium (Cr6+), a known human carcinogen. Previous studies have demonstrated that using tetramethylsilane (TMS) as a shielding gas additive can significantly reduce the Cr6+ concentration in welding fume particles. In this study, a novel insulated double shroud torch (IDST) was developed to further improve the reduction of airborne Cr6+ concentration by separating the flows of the primary shielding gas and the TMS carrier gas. Welding fumes were collected from a welding chamber in the laboratory and from a fixed location near the welding arc in a welding facility. The Cr6+ content was analyzed with ion chromatography and X-ray photoelectron spectroscopy (XPS). Results from the chamber sampling demonstrated that the addition of 3.2 5.1% of TMS carrier gas to the primary shielding gas resulted in more than a 90% reduction of airborne Cr6+ under all shielding gas flow rates. The XPS result confirmed complete elimination of Cr6+ inside the amorphous silica shell. Adding 100 1000 ppm of nitric oxide or carbon monoxide to the shielding gas could also reduce Cr6+ concentrations up to 57% and 35%, respectively; however, these reducing agents created potential hazards from the release of unreacted agents. Results of the field test showed that the addition of 1.6% of TMS carrier gas to the primary shielding gas reduced Cr6+ concentration to the limitation of detection (1.1 mu g/m3). In a worst-case scenario, if TMS vapor leaked into the environment without decomposition and ventilation, the estimated TMS concentration in the condition of field sampling would be a maximum 5.7 ppm, still well below its flammability limit (1%). Based on a previously developed cost model, the use of TMS increases the general cost by 3.8%. No visual deterioration of weld quality caused by TMS was found, although further mechanical testing is necessary.
C1 [Wang, Jun; Kalivoda, Mark; Guan, Jianying; Wu, Chang-Yu] Univ Florida, Engn Sch Sustainable Infrastruct & Environm, Dept Environm Engn Sci, Gainesville, FL 32611 USA.
[Theodore, Alexandros; Sharby, Jessica] Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA.
[Wu, Chang-Yu] Natl Cheng Kung Univ, Dept Environm Engn, Tainan 70101, Taiwan.
[Paulson, Kathleen] USN, Facil Engn Command, Engn & Expeditionary Warfare Ctr, Port Hueneme, CA USA.
[Es-Said, Omar] Loyola Marymount Univ, Dept Mech Engn, Los Angeles, CA 90045 USA.
RP Wu, CY (reprint author), Univ Florida, Engn Sch Sustainable Infrastruct & Environm, Dept Environm Engn Sci, 406 Black Hall, Gainesville, FL 32611 USA.
EM cywu@ufl.edu
RI Wang, Jun/J-6108-2012; Wang, Jun/K-3482-2013
OI Wang, Jun/0000-0003-1690-0460
FU U.S. Department of Defense through the Environmental Security Technology
Certification Program (ESTCP) [WP-0903]; University Scholarship Program
at University of Florida
FX T he authors appreciate Tooele Army Depot (TEAD) providing the field
test platform, and Major Analytical Instrumentation Center (MAIC) at the
University of Florida providing access to the XPS. Financial support of
this study was provided by the U.S. Department of Defense through the
Environmental Security Technology Certification Program (ESTCP) under
Grant No. WP-0903. The authors would like to thank Dr. David Phillips at
Ohio State University for assisting with the cost assessment. Jianying
Guan acknowledges the University Scholarship Program at University of
Florida for supporting undergraduate students involved in the study.
NR 48
TC 1
Z9 2
U1 2
U2 10
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 1545-9624
J9 J OCCUP ENVIRON HYG
JI J. Occup. Environ. Hyg.
PY 2012
VL 9
IS 12
BP 733
EP 742
DI 10.1080/15459624.2012.733576
PG 10
WC Environmental Sciences; Public, Environmental & Occupational Health
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health
GA 057XC
UT WOS:000312596700009
PM 23113576
ER
PT J
AU Chu, PY
Jacobs, GA
Cambazoglu, MK
Linzell, RS
AF Chu, Philip Y.
Jacobs, Gregg A.
Cambazoglu, M. Kemal
Linzell, Robert S.
TI Multi-Model Validation of Currents in the Chesapeake Bay Region in June
2010
SO MARINE GEODESY
LA English
DT Article
DE Chesapeake Bay; model validation; coastal models; currents; water
levels; NCOM; Delft3D; ADCIRC
ID MODEL
AB In this paper, we discuss the validation of water level and current predictions from three coastal hydrodynamic models and document the resource and operational requirements for each modeling system. The ADvanced CIRCulation Model (ADCIRC), the Navy Coastal Ocean Model (NCOM), and Delft3D have been configured and validated for the Chesapeake Bay region during a Navy exercise. Water level predictions are compared with a NOAA/NOS water level gauge at the Chesapeake Bay Bridge Tunnel location while current predictions are validated with Acoustic Doppler Profiler (ADP) measurement records at three locations in the lower Chesapeake Bay. Statistical metrics such as correlation coefficient and root mean square error (RMSE) are computed. Both the vertically-integrated currents and currents at varying water depths are compared as well. The model-data comparisons for surface elevation indicate all three models agreed well with water level gauge data. The two-dimensional version of ADCIRC, ADCIRC2D, and NCOM yield better statistics, in terms of correlation and RMSE, than Delft3D. For vertically-integrated currents, ADCIRC2D has the smallest RMSE at Thimble Shoal and Naval Station locations while NCOM has the smallest RMSE at Cape Henry. For the horizontal currents over the water column, the fully three-dimensional, baroclinic ADCIRC model, ADCIRC3D, and NCOM both showed better agreement with the ADP measurements.
C1 [Chu, Philip Y.; Jacobs, Gregg A.] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[Cambazoglu, M. Kemal] Univ So Mississippi, Stennis Space Ctr, MS USA.
[Linzell, Robert S.] QinetiQ N Amer Inc, Stennis Space Ctr, MS USA.
RP Chu, PY (reprint author), USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
EM chu@nrlssc.navy.mil
NR 15
TC 1
Z9 1
U1 3
U2 5
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0149-0419
J9 MAR GEOD
JI Mar. Geod.
PY 2012
VL 35
IS 4
BP 399
EP 428
DI 10.1080/01490419.2012.709477
PG 30
WC Geochemistry & Geophysics; Oceanography; Remote Sensing
SC Geochemistry & Geophysics; Oceanography; Remote Sensing
GA 055TD
UT WOS:000312439600005
ER
PT S
AU Ko, YK
Tylka, AJ
Ng, CK
Wang, YM
AF Ko, Yuan-Kuen
Tylka, Allan J.
Ng, Chee K.
Wang, Yi-Ming
BE Hu, Q
Li, G
Zank, GP
Ao, X
Verkhoglyadova, O
Adams, JH
TI On the Relationship Between Heavy-Ion Composition Variability in Gradual
SEP Events and the Associated IMF Source Regions
SO SPACE WEATHER: THE SPACE RADIATION ENVIRONMENT
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 11th Annual International Astrophysics Conference (AIAC)
CY MAR 19-23, 2012
CL Palm Springs, CA
SP Univ Alabama, Ctr Space Plasma & Aeronom Res
DE Solar Energetic Particles; Solar Magnetic Field; Abundances
ID SOLAR-WIND
AB We investigated the relationship between heavy-ion composition variability in gradual solar energetic particle (SEP) events and the source regions of the associated interplanetary magnetic field (IMF) along which these SEPs are transported. In particular, we found that the SEP elemental composition has a positive correlation with the unsigned photospheric magnetic field strength around the IMF footpoints. Furthermore, the IMF source region can be generally categorized into two classes, depending on whether the associated solar wind, and correspondingly the footpoints of the open magnetic field along which the SEPs are transported, are from a coronal hole (CH) near an active region (an 'AR field-source') or from a CH without an AR in its close proximity (a 'CH field-source'). This study is based on 24 events observed in years 1998 and 2003-2006. We present in this paper the results for Fe/O as an example, and show that the observed SEP Fe/O ratio at 3-30 MeV/nucleon is preferentially enhanced in the case of AR field-source. By contrast, the distributions of Fe/O for the in-situ solar-wind thermal particles in these time intervals are essentially indistinguishable between the two field-sources. Our results suggest that suprathermal ions are the preferred seed particles for shock acceleration, and the composition of these suprathermals depends on the magnetic field where they are generated, with suprathermals associated with active regions, i.e. stronger photospheric magnetic field, having larger heavy-ion enhancements than suprathermals associated with coronal holes with weak magnetic field. These results open a new window in understanding the origin and production of the suprathermal seed particles for SEPs.
C1 [Ko, Yuan-Kuen; Tylka, Allan J.; Wang, Yi-Ming] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
[Ng, Chee K.] George Mason Univ, Coll Sci, Fairfax, VA USA.
RP Ko, YK (reprint author), USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
RI Tylka, Allan/G-9592-2014
FU Office of Naval Research; NASA [DPR NNH09AK79I, NNH10AO82I]
FX We thank Nathan Rich and the SOHO/EIT team for providing the EIT
synoptic maps. The MDI synoptic maps are provided by the SOHO/ MDI
consortium. SOHO is a project of international cooperation between ESA
and NASA. We thank Don Reames for providing Wind/ EPACT data, and the
ACE instrument teams and the ACE Science Center for providing the ACE
data. This work has been supported by the Office of Naval Research, and
by NASA grants DPR NNH09AK79I and NNH10AO82I.
NR 8
TC 1
Z9 1
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-1114-2
J9 AIP CONF PROC
PY 2012
VL 1500
BP 26
EP 31
DI 10.1063/1.4768740
PG 6
WC Astronomy & Astrophysics; Physics, Applied
SC Astronomy & Astrophysics; Physics
GA BDB00
UT WOS:000312410500004
ER
PT S
AU Wu, CC
Wu, ST
Liou, K
Plunkett, S
AF Wu, C. -C.
Wu, S. T.
Liou, K.
Plunkett, S.
BE Hu, Q
Li, G
Zank, GP
Ao, X
Verkhoglyadova, O
Adams, JH
TI Evolution of a Magnetohydrodynamic Coronal Shock
SO SPACE WEATHER: THE SPACE RADIATION ENVIRONMENT
SE AIP Conference Proceedings
LA English
DT Proceedings Paper
CT 11th Annual International Astrophysics Conference (AIAC)
CY MAR 19-23, 2012
CL Palm Springs, CA
SP Univ Alabama, Ctr Space Plasma & Aeronom Res
DE Coronal Mass Ejection; Interplanetary Shock; 3-D MHD simulation
ID 3-DIMENSIONAL MHD SIMULATION; MAGNETIC-FIELD CHANGES; MASS EJECTION;
SOLAR-WIND; NUMERICAL-SIMULATION; SLOW SHOCKS; 1 AU; EARTH; PROPAGATION;
TIME
AB We present results from a study of the CME event that occurred in May 1997 using a data-driven three-dimensional (3-D), time-dependent, magnetohydrogynamic (MHD) numerical simulation model [1]. We focus on the initiation and evolution of the coronal mass ejection (CME) and its driven shock in the corona. The model takes the line-of-sight magnetic field at the photosphere as input to build the background corona and solar wind. A pressure pulse is applied to the simulation domain at the observed flare site to initiate a CME. A wave tracing method [2] is used to determine and trace the shock. It is found that the CME-driven shock starts forming at similar to 1.5 solar radii (Rs) from the center of the Sun. The strength of the shock (Mach no. of fast shock) is found to increase with increasing heights (between 1.5 and 3.2 Rs). The increase in the shock strength is due to a decrease in the fast wave speed. In contrast, the density compression ratio of the shock is found to decrease as the shock propagates away from the Sun.
C1 [Wu, C. -C.; Plunkett, S.] USN, Res Lab, Washington, DC 20375 USA.
[Wu, S. T.] Univ Alabama, CSPAR, Huntsville, AL USA.
[Liou, K.] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA.
RP Wu, CC (reprint author), USN, Res Lab, Washington, DC 20375 USA.
RI Liou, Kan/C-2089-2016
OI Liou, Kan/0000-0001-5277-7688
FU National Space Science Data Center at Goddard Space Flight Center; NRL
6.1 program; (CCW, and SP); STW; NSF [AGS-1153323, NSF ATM0754278,
AGS-0964396]; NASA/EPSCoR [(NNNX09AP74A)]
FX We thank the Wind PI team and National Space Science Data Center at
Goddard Space Flight Center for management and providing Wind plasma and
magnetic field solar wind data. This study is supported partially by NRL
6.1 program (CCW, and SP). STW is supported by NSF AGS-1153323, NSF
ATM0754278, and NASA/EPSCoR (NNNX09AP74A) Grant. KL is supported by the
NSF AGS-0964396 Grant.
NR 22
TC 2
Z9 2
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
SN 0094-243X
BN 978-0-7354-1114-2
J9 AIP CONF PROC
PY 2012
VL 1500
BP 50
EP 55
DI 10.1063/1.4768744
PG 6
WC Astronomy & Astrophysics; Physics, Applied
SC Astronomy & Astrophysics; Physics
GA BDB00
UT WOS:000312410500008
ER
PT S
AU Aguilar, CO
Krener, AJ
AF Aguilar, Cesar O.
Krener, Arthur J.
GP IEEE
TI High-order numerical solutions to Bellman's equation of optimal control
SO 2012 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUN 27-29, 2012
CL Montreal, CANADA
SP Boeing, Bosch, Corning, Eaton, GE Global Res, Honeywell, MathWorks, Mitsubishi Elect Res Lab, Natl Instruments, Xerox, Adept MobileRobots, Momentum Press, Quanser, SIAM, Springer, Taylor & Francis, United Technologies Res Ctr, Visual Solut, Wiley-Blackwell
AB In this paper we develop a numerical method to compute high-order approximate solutions to Bellman's dynamic programming equation that arises in the optimal regulation of discrete-time nonlinear control systems. The method uses a patchy technique to build Taylor polynomial approximations defined on small domains which are then patched together to create a piecewise-smooth approximation. Using the values of the computed cost function as the step-size, levels of patches are constructed such that their radial boundaries are level sets of the computed cost functions and their lateral boundaries are invariants sets of the closed-loop dynamics. To minimize the computational effort, an adaptive scheme is used to determine the number of patches on each level depending on the relative error of the computed solutions.
C1 [Aguilar, Cesar O.; Krener, Arthur J.] USN, Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
EM coaguila@nps.edu; ajkrener@nps.edu
NR 5
TC 0
Z9 0
U1 0
U2 1
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
SN 0743-1619
BN 978-1-4577-1096-4
J9 P AMER CONTR CONF
PY 2012
BP 1832
EP 1837
PG 6
WC Automation & Control Systems; Engineering, Electrical & Electronic
SC Automation & Control Systems; Engineering
GA BCN53
UT WOS:000310776202021
ER
PT S
AU O'Brien, RT
Watkins, RJ
Thorp, OG
AF O'Brien, Richard T., Jr.
Watkins, R. Joseph
Thorp, Owen G.
GP IEEE
TI Cross-coupling estimation for optical beam stabilization
SO 2012 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUN 27-29, 2012
CL Montreal, CANADA
SP Boeing, Bosch, Corning, Eaton, GE Global Res, Honeywell, MathWorks, Mitsubishi Elect Res Lab, Natl Instruments, Xerox, Adept MobileRobots, Momentum Press, Quanser, SIAM, Springer, Taylor & Francis, United Technologies Res Ctr, Visual Solut, Wiley-Blackwell
AB This paper presents a real-time algorithm for estimating the cross-coupling coefficients in a fast-steering mirror that serves as the actuator for an optical beam stabilization system. The algorithm computes the cross-coupling coefficients estimates by comparing the measured beam position with the predicted beam position from the uncoupled system model. This algorithm provides a means for estimating the relative orientation between the beam source platform and target platform as well. The algorithm is verified using experimental data from the United States Naval Academy Directed Energy Laboratory.
C1 [O'Brien, Richard T., Jr.; Thorp, Owen G.] USN Acad, Weap & Syst Engn Dept, Annapolis, MD 21402 USA.
RP O'Brien, RT (reprint author), USN Acad, Weap & Syst Engn Dept, Annapolis, MD 21402 USA.
EM riobrien@usna.edu; rwatkins@usna.edu; thorp@usna.edu
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
SN 0743-1619
BN 978-1-4577-1096-4
J9 P AMER CONTR CONF
PY 2012
BP 3944
EP 3949
PG 6
WC Automation & Control Systems; Engineering, Electrical & Electronic
SC Automation & Control Systems; Engineering
GA BCN53
UT WOS:000310776204040
ER
PT S
AU O'Brien, RT
Watkins, RJ
Thorp, OG
AF O'Brien, Richard T., Jr.
Watkins, R. Joseph
Thorp, Owen G.
GP IEEE
TI Experimental verification of an optical beam stabilizing controller
SO 2012 AMERICAN CONTROL CONFERENCE (ACC)
SE Proceedings of the American Control Conference
LA English
DT Proceedings Paper
CT American Control Conference (ACC)
CY JUN 27-29, 2012
CL Montreal, CANADA
SP Boeing, Bosch, Corning, Eaton, GE Global Res, Honeywell, MathWorks, Mitsubishi Elect Res Lab, Natl Instruments, Xerox, Adept MobileRobots, Momentum Press, Quanser, SIAM, Springer, Taylor & Francis, United Technologies Res Ctr, Visual Solut, Wiley-Blackwell
AB This paper presents experimental verification for a H-infinity stabilizing controller for an optical beam subject to tonal disturbances. The proposed controller forces the power density at all disturbance frequencies below a prescribed level. Furthermore, the effect of significant input saturation on stability and performance is investigated.
C1 [O'Brien, Richard T., Jr.; Thorp, Owen G.] USN Acad, Weap & Syst Engn Dept, Annapolis, MD 21402 USA.
RP O'Brien, RT (reprint author), USN Acad, Weap & Syst Engn Dept, Annapolis, MD 21402 USA.
EM riobrien@usna.edu; rwatkins@usna.edu; thorp@usna.edu
NR 14
TC 1
Z9 1
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
SN 0743-1619
BN 978-1-4577-1096-4
J9 P AMER CONTR CONF
PY 2012
BP 3950
EP 3955
PG 6
WC Automation & Control Systems; Engineering, Electrical & Electronic
SC Automation & Control Systems; Engineering
GA BCN53
UT WOS:000310776204041
ER
PT J
AU Walters, R
Kraig, RP
Medintz, I
Delehanty, JB
Stewart, MH
Susumu, K
Huston, AL
Dawson, PE
Dawson, G
AF Walters, Ryan
Kraig, Richard P.
Medintz, Igor
Delehanty, James B.
Stewart, Michael H.
Susumu, Kimihiro
Huston, Alan L.
Dawson, Philip E.
Dawson, Glyn
TI Nanoparticle targeting to neurons in a rat hippocampal slice culture
model
SO ASN NEURO
LA English
DT Article
DE cell targeting; drug delivery; nanoparticle; neuronal uptake; pyramidal
neuron; quantum dot
ID SEMICONDUCTOR QUANTUM DOTS; SPREADING DEPRESSION; BIOCOMPATIBLE
SEMICONDUCTOR; PHARMACOLOGICAL CHAPERONES; ORGAN-CULTURE; IN-VIVO;
DELIVERY; LIGANDS; STABILITY; PROTEINS
AB We have previously shown that CdSe/ZnS core/shell luminescent semiconductor nanocrystals or QDs (quantum dots) coated with PEG [poly(ethylene glycol)]-appended DHLA (dihydrolipoic acid) can bind AcWG(Pal) VKIKKP(9)GGH(6) (Palm1) through the histidine residues. The coating on the QD provides colloidal stability and this peptide complex uniquely allows the QDs to be taken up by cultured cells and readily exit the endosome into the soma. We now show that use of a polyampholyte coating [in which the neutral PEG is replaced by the negatively heterocharged CL4 (compact ligand)], results in the specific targeting of the palmitoylated peptide to neurons in mature rat hippocampal slice cultures. There was no noticeable uptake by astrocytes, oligodendrocytes or microglia (identified by immunocytochemistry), demonstrating neuronal specificity to the overall negatively charged CL4 coating. In addition, EM (electron microscopy) images confirm the endosomal egress ability of the Palm1 peptide by showing a much more disperse cytosolic distribution of the CL4 QDs conjugated to Palm1 compared with CL4 QDs alone. This suggests a novel and robust way of delivering neurotherapeutics to neurons.
C1 [Walters, Ryan; Kraig, Richard P.; Dawson, Glyn] Univ Chicago, Comm Neurobiol, Chicago, IL 60637 USA.
[Kraig, Richard P.] Univ Chicago, Dept Neurol, Chicago, IL 60637 USA.
[Medintz, Igor; Delehanty, James B.] USN, Res Lab, Ctr Bio Mol Sci & Engn, Washington, DC 20375 USA.
[Stewart, Michael H.; Susumu, Kimihiro; Huston, Alan L.] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA.
[Dawson, Philip E.] Scripps Res Inst, La Jolla, CA 92037 USA.
[Dawson, Glyn] Univ Chicago, Dept Pediat, Chicago, IL 60637 USA.
[Dawson, Glyn] Univ Chicago, Dept Biochem, Chicago, IL 60637 USA.
[Dawson, Glyn] Univ Chicago, Dept Mol Biol, Chicago, IL 60637 USA.
RP Dawson, G (reprint author), Univ Chicago, Comm Neurobiol, Chicago, IL 60637 USA.
EM dawg@uchicago.edu
FU USPHS (United States Public Health Service) [NS36866-38, NS-19108]; P50
Grant [HD09402]; Childrens Brain Disease Foundation; NRL (Naval Research
Laboratory); NRL NSI (Naval Research Laboratory Nanoscience Institute);
ONR (Office of Naval Research); DARPA (Defense Advanced Research Project
Agency); DTRA (Defense Threat Research Agency) JSTO (Joint Science and
Technology Office) MIPR (Military Interdepartmental Purchase Request)
[B112582M]; [GM098871]
FX This work was supported by USPHS (United States Public Health Service)
[grant numbers NS36866-38 (to G. D.) NS-19108 (to R. K.)] and P50 Grant
[grant number HD09402 (to G. D. and R. K.)], as well as the Childrens
Brain Disease Foundation. Philip Dawson was supported by [GM098871]. I.
M. and A. H. were supported by NRL (Naval Research Laboratory), the NRL
NSI (Naval Research Laboratory Nanoscience Institute), ONR (Office of
Naval Research), DARPA (Defense Advanced Research Project Agency) and
DTRA (Defense Threat Research Agency) JSTO (Joint Science and Technology
Office) MIPR (Military Interdepartmental Purchase Request) [grant number
B112582M].
NR 38
TC 26
Z9 27
U1 2
U2 28
PU PORTLAND PRESS LTD
PI LONDON
PA THIRD FLOOR, EAGLE HOUSE, 16 PROCTER STREET, LONDON WC1V 6 NX, ENGLAND
SN 1759-0914
J9 ASN NEURO
JI ASN Neuro
PY 2012
VL 4
IS 6
AR e00099
DI 10.1042/AN20120042
PG 10
WC Neurosciences
SC Neurosciences & Neurology
GA 052PO
UT WOS:000312210600003
PM 22973864
ER
PT S
AU Hendriks, A
Naidoo, D
Roux, FS
Lopez-Mariscal, C
Forbes, A
AF Hendriks, Adriaan
Naidoo, Darryl
Roux, Filippus S.
Lopez-Mariscal, Carlos
Forbes, Andrew
BE Forbes, A
Lizotte, TE
TI The generation of flat-top beams by complex amplitude modulation with a
phase-only spatial light modulator
SO LASER BEAM SHAPING XIII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Laser Beam Shaping XIII
CY AUG 13, 2012
CL San Diego, CA
SP SPIE
DE Flat-top beams; spatial light modulator; complex amplitude modulation
ID INTENSITY PROFILE; LASER; TRANSFORMATION; DESIGN; IRRADIANCE; SYSTEMS;
MIRROR
AB Phase-only spatial light modulators are now ubiquitous tools in modern optics laboratories, and are often used to generate so-called structured light. In this work we outline the use of a phase-only spatial light modulator to achieve full complex amplitude modulation of the light, i.e., in amplitude and phase. We outline the theoretical concept, and then illustrate its use with the example of the laser beam shaping of Gaussian beams into flat-top beams. We quantify the performance of this approach for the creation of such fields, and compare the results to conventional lossless approaches to flat-top beam generation.
C1 [Hendriks, Adriaan; Naidoo, Darryl; Roux, Filippus S.; Forbes, Andrew] CSIR Natl Laser Ctr, POB 395, ZA-0001 Pretoria, South Africa.
[Hendriks, Adriaan; Naidoo, Darryl; Forbes, Andrew] Univ Stellenbosch, Laser Res Inst, ZA-7602 Stellenbosch, South Africa.
[Lopez-Mariscal, Carlos] US Naval Res Lab, Washington, DC 20375 USA.
[Forbes, Andrew] Univ KwaZulu Natal, Sch Phys, ZA-4000 Durban, South Africa.
RP Forbes, A (reprint author), CSIR Natl Laser Ctr, POB 395, ZA-0001 Pretoria, South Africa.
EM aforbes1@csir.co.za
OI Forbes, Andrew/0000-0003-2552-5586; Roux, Filippus/0000-0001-9624-4189
NR 24
TC 0
Z9 0
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9207-4
J9 PROC SPIE
PY 2012
VL 8490
AR 849006
DI 10.1117/12.932224
PG 8
WC Optics; Physics, Applied
SC Optics; Physics
GA BCZ55
UT WOS:000312205700005
ER
PT S
AU Penado, FE
Clark, JH
Dugdale, J
AF Penado, F. Ernesto
Clark, James H., III
Dugdale, Joel
BE Sasian, J
Youngworth, RN
TI A support structure for a compliant deformable mirror
SO OPTICAL SYSTEM ALIGNMENT, TOLERANCING, AND VERIFICATION VI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Optical System Alignment, Tolerancing, and Verification VI
CY AUG 12-13, 2012
CL San Diego, CA
SP SPIE
DE optical interferometry; adaptive optics; static deformable mirror;
wavefront distortion; NPOI; mirror deformations; finite element
analysis; single force actuator
ID PROTOTYPE OPTICAL INTERFEROMETER
AB The Navy's ground-based optical interferometer requires 10 discrete reflections for each of its six stations that transport stellar radiation into a six-way beam combiner where the modulated beams are overlapped in a collinear fashion and fringes obtained for analysis. Wavefront aberrations, introduced at each reflection from non-perfect mirrors, reduce the quality of fringe contrast and adversely affect the final science results. In practice, mirror fabrication and mounting methods generate small surface irregularities that produce aberrations in the reflected wavefront beam. Under multiple reflection scenarios, these errors do not necessarily cancel one another, and can increase the resultant wavefront distortion. In a previous paper, we showed a single-force actuator acting on the back surface of an 8-inch diameter Zerodur (R) mirror will achieve a canceling deformation in the reflective surface that substantially reduces the combined wavefront aberrations resulting from a 7-reflection beam. Our finite element model demonstrated that the peak-to-valley difference can be reduced from 210 nm to 55 nm. In this paper, we extend our previous work to include a support structure to contain the deforming mirror and analyze its interaction and effect on the corrected wavefront. Our design used the mechanical advantage gained from a tuned flexure plate with a simple motorized screw actuator applied to the back mirror surface to achieve an 87: 1 deflection ratio on the front mirror surface. A practical design is proposed, the support structure and mirror analyzed using the finite element method, and the results presented and discussed.
C1 [Penado, F. Ernesto; Dugdale, Joel] No Arizona Univ, Dept Mech Engn, Flagstaff, AZ 86011 USA.
[Clark, James H., III] NPOI, Naval Res Lab, Flagstaff, AZ 86001 USA.
RP Penado, FE (reprint author), No Arizona Univ, Dept Mech Engn, Flagstaff, AZ 86011 USA.
EM Ernesto.Penado@nau.edu
NR 8
TC 1
Z9 1
U1 0
U2 4
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9208-1
J9 PROC SPIE
PY 2012
VL 8491
AR 84910D
DI 10.1117/12.930008
PG 11
WC Optics
SC Optics
GA BCZ57
UT WOS:000312209900010
ER
PT J
AU Coneski, PN
Fulmer, PA
Wynne, JH
AF Coneski, Peter N.
Fulmer, Preston A.
Wynne, James H.
TI Thermal polycondensation of poly(diol citrate)s with tethered quaternary
ammonium biocides
SO RSC ADVANCES
LA English
DT Article
ID RING-OPENING POLYMERIZATION; BIODEGRADABLE ELASTOMERS; ALIPHATIC
POLYESTERS; BIOMATERIALS; DEGRADATION; CHEMISTRY; POLYMERS
AB The synthesis and characterization of a series of novel, antimicrobial, aliphatic polyesters based on citric acid, alkanediols, and quaternary ammonium salt (QAS) diols is described. These materials possess a wide range of mechanical and thermal properties (storage modulus, E' = 1.03-17.53 MPa at 25 degrees C; T-g = 215.7-38.6 degrees C) primarily dictated by alkanediol selection and the presence of biocide. Surface analysis via contact angle and FTIR-ATR studies indicate the presence of biocide at the material/air interface providing high antimicrobial activity (5-7 log kill of S. aureus over controls) for all materials containing tethered QAS. Hydrolysis of these cross-linked materials was also highly controlled based on the QAS, alkanediol structure, and curing duration; and significant hydrolysis occurs in as little as 4 weeks.
C1 [Coneski, Peter N.; Fulmer, Preston A.; Wynne, James H.] USN, Div Chem, Res Lab, Washington, DC 20375 USA.
RP Coneski, PN (reprint author), USN, Div Chem, Res Lab, Code 6100,4555 Overlook Ave SW, Washington, DC 20375 USA.
EM james.wynne@nrl.navy.mil
RI Fulmer, Preston/L-7702-2014
OI Fulmer, Preston/0000-0002-2981-576X
FU Office of Naval Research; Naval Research Laboratory
FX This work was funded by the Office of Naval Research and the Naval
Research Laboratory.
NR 24
TC 6
Z9 6
U1 2
U2 16
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 2046-2069
J9 RSC ADV
JI RSC Adv.
PY 2012
VL 2
IS 33
BP 12824
EP 12834
DI 10.1039/c2ra21286b
PG 11
WC Chemistry, Multidisciplinary
SC Chemistry
GA 051TF
UT WOS:000312149600045
ER
PT S
AU McNelley, TR
Menon, ES
AF McNelley, Terry R.
Menon, E. Sarath
BE Chandra, T
Ionescu, M
Mantovani, D
TI Friction Stir Processing (FSP) of Cast Metals: Processing -
Microstructure - Property Relationships
SO THERMEC 2011, PTS 1-4
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 7th International Conference on Processing and Manufacturing of Advanced
Materials
CY AUG 01-05, 2011
CL Quebec City, CANADA
SP Minerals, Metals & Mat Soc
DE Friction stir processing; Homogenization; Microstructure refinement;
Mechanical properties; Superplasticity
ID SUPERPLASTIC AA5083 MATERIALS; NIAL BRONZE; DEFORMATION; MECHANISMS;
FAILURE
AB FSP is an allied technology of friction stir welding (FSW). These processes are reviewed and the additional considerations such as processing pattern and step over distance in FSP are introduced. The application of FSP to cast metals including AA5083, Al-7Si and NiAl bronze is summarized. As-cast microstructures may be converted to a wrought condition in the absence of external shape change and the extent of grain refinement and homogenization of microstructure is documented. The FSP-induced superplastic response of AA5083, enhanced ductility of Al-7Si and surface hardening of NiAl bronze are summarized as examples of properties developed by FSP.
C1 [McNelley, Terry R.; Menon, E. Sarath] USN, Postgrad Sch, Dept Mech & Aerosp Engn, Monterey, CA 93943 USA.
RP McNelley, TR (reprint author), USN, Postgrad Sch, Dept Mech & Aerosp Engn, 700 Dyer Rd, Monterey, CA 93943 USA.
EM tmcnelley@nps.edu; skmeno1@nps.edu
NR 21
TC 2
Z9 2
U1 0
U2 3
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2012
VL 706-709
BP 194
EP 201
DI 10.4028/www.scientific.net/MSF.706-709.194
PG 8
WC Materials Science, Multidisciplinary
SC Materials Science
GA BBW89
UT WOS:000308517300027
ER
PT S
AU Fonda, RW
Reynolds, AP
Feng, CR
Knipling, KE
Rowenhorst, DJ
AF Fonda, Richard W.
Reynolds, Anthony P.
Feng, C. R.
Knipling, Keith E.
Rowenhorst, David J.
BE Chandra, T
Ionescu, M
Mantovani, D
TI Material Flow in Aluminum Friction Stir Welds
SO THERMEC 2011, PTS 1-4
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 7th International Conference on Processing and Manufacturing of Advanced
Materials
CY AUG 01-05, 2011
CL Quebec City, CANADA
SP Minerals, Metals & Mat Soc
DE Friction stir welding; texture
ID GRAIN-STRUCTURE; CRYSTALLOGRAPHIC TEXTURE; MICROSTRUCTURE; ALLOY
AB A detailed examination of the textural evolution occurring within a friction stir weld of AA2195 reveals features that are not consistent with current models of material flow in friction stir welds. While the deposited weld is dominated by a B ideal shear texture component, this texture periodically alternates with a (B) over bar texture, indicating a reversal in the sense of the shear deformation. In addition, the observed rotation of the orientation of these shear textures, and their replacement by a distinct, new shear texture orientation to correct for the misorientation that develops, reveals a heretofore unobserved characteristic of friction stir welds that provides further details about material flow during friction stir welding.
C1 [Fonda, Richard W.; Feng, C. R.; Knipling, Keith E.; Rowenhorst, David J.] USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
[Reynolds, Anthony P.] Univ South Carolina, Columbia, SC 29208 USA.
RP Fonda, RW (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM richard.fonda@nrl.navy.mil; apr@sc.edu; jerry.feng@nrl.navy.mil;
keith.knipling@nrl.navy.mil; david.rowenhorst@nrl.navy.mil
NR 22
TC 1
Z9 1
U1 0
U2 9
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
J9 MATER SCI FORUM
PY 2012
VL 706-709
BP 983
EP +
DI 10.4028/www.scientific.net/MSF.706-709.983
PG 3
WC Materials Science, Multidisciplinary
SC Materials Science
GA BBW89
UT WOS:000308517300161
ER
PT S
AU Sandhu, R
Gambin, V
Poust, B
Smorchkova, I
Lewis, G
Elmadjian, R
Li, D
Geiger, C
Heying, B
Wojtowicz, M
Oki, A
Feygelson, T
Hobart, K
Bozorg-Grayeli, E
Goodson, K
AF Sandhu, Rajinder
Gambin, Vincent
Poust, Benjamin
Smorchkova, Ioulia
Lewis, Gregg
Elmadjian, Raffi
Li, Danny
Geiger, Craig
Heying, Ben
Wojtowicz, Mike
Oki, Aaron
Feygelson, Tatyana
Hobart, Karl
Bozorg-Grayeli, Elah
Goodson, Kenneth
GP IEEE
TI Diamond Materials for GaN HEMT Near Junction Heat Removal
SO 2012 IEEE COMPOUND SEMICONDUCTOR INTEGRATED CIRCUIT SYMPOSIUM (CSICS)
SE IEEE Compound Semiconductor Integrated Circuit Symposium Technical
Digest
LA English
DT Proceedings Paper
CT IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS)
CY OCT 14-17, 2012
CL La Jolla, CA
SP IEEE
AB GaN HEMT technology is transforming applications in communications, radar, and electronic warfare by offering more than 5x higher RF transmit power over the existing GaAs-based technologies. The high breakdown voltage and current handling capability of GaN HEMTs enables, for the same device size, a 10x increase in RF power using GaN-based devices in place of conventional GaAs-based devices. However the ultimate power and performance of GaN technology cannot be exploited in real applications due to thermal limitations on performance and reliability. The high power density in GaN HEMTs translates to mega-Watts/cm(2) heat dissipation at the device gate region. Increasing the heat conductance near the GaN device junction is critical to reduce device junction temperature for reliable operation and performance. NGAS will report on revolutionary methods being developed to directly integrate high quality, high thermal conductivity diamond materials with more than 4x greater thermal conductivity over existing state-of-the-art GaN HEMT technology.
C1 [Sandhu, Rajinder; Gambin, Vincent; Poust, Benjamin; Smorchkova, Ioulia; Lewis, Gregg; Elmadjian, Raffi; Li, Danny; Geiger, Craig; Heying, Ben; Wojtowicz, Mike; Oki, Aaron] Northrop Grumman Aerosp Syst, Redondo Beach, CA 90278 USA.
[Feygelson, Tatyana; Hobart, Karl] Naval Res Lab, Washington, DC 20375 USA.
[Bozorg-Grayeli, Elah; Goodson, Kenneth] Stanford Univ, Stanford, CA 94305 USA.
RP Sandhu, R (reprint author), Northrop Grumman Aerosp Syst, Redondo Beach, CA 90278 USA.
NR 0
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1550-8781
BN 978-1-4673-0929-5
J9 COMP SEMICOND INTEGR
PY 2012
PG 1
WC Engineering, Electrical & Electronic
SC Engineering
GA BCY16
UT WOS:000311948600067
ER
PT B
AU Booth, A
AF Booth, Allyson
BE Piette, A
Rawlinson, M
TI THE TRENCHES
SO EDINBURGH COMPANION TO TWENTIETH-CENTURY BRITISH AND AMERICAN WAR
LITERATURE
LA English
DT Article; Book Chapter
C1 USN Acad, Annapolis, MD 21402 USA.
RP Booth, A (reprint author), USN Acad, Annapolis, MD 21402 USA.
NR 19
TC 0
Z9 0
U1 0
U2 0
PU EDINBURGH UNIV PRESS
PI EDINBURGH
PA 22 GEORGE SQUARE, EDINBURGH EH8 9JY, MIDLOTHIAN, SCOTLAND
BN 978-0-7486-5391-1
PY 2012
BP 431
EP 438
PG 8
WC Literary Theory & Criticism
SC Literature
GA BCG02
UT WOS:000310137400047
ER
PT S
AU Pique, A
Charipar, NA
Kim, H
Kirleis, MA
Auyeung, RCY
Smith, AT
Metkus, KM
Mathews, SA
AF Pique, Alberto
Charipar, Nicholas A.
Kim, Heungsoo
Kirleis, Matthew A.
Auyeung, Ray C. Y.
Smith, Andrew T.
Metkus, Kristin M.
Mathews, Scott A.
BE Boardman, AD
Engheta, N
Noginov, MA
Zheludev, NI
TI Realization of Metamaterial Structures by Non-Lithographic Processes
SO METAMATERIALS: FUNDAMENTALS AND APPLICATIONS V
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Metamaterials - Fundamentals and Applications V
CY AUG 12-16, 2012
CL San Diego, CA
SP SPIE
DE Non-Lithographic Processes; Laser Direct-Write; Laser Decal Transfer;
Digital Light Processor; Metamaterials; Split Ring Resonators;
Electrically Small Antennas
ID LASER DIRECT-WRITE
AB The opportunities presented by the use of metamaterials have been the subject of extensive discussions. However, a large fraction of the work available to date has been limited to simulations and proof-of-principle demonstrations. One reason for the limited success inserting these structures into functioning systems and real-world applications is the high level of complexity involved in their fabrication. Most approaches to the realization of metamaterial structures utilize traditional lithographic processing techniques to pattern the required geometries and then rely on separate steps to assemble the final design. Obviously, composite structures with arbitrary and/or 3-D geometries present a challenge for their implementation with these approaches. Non-lithographic processes are ideally suited for the fabrication of arbitrary periodic and aperiodic structures needed to implement many of the metamaterial designs being proposed. Furthermore, non-lithographic techniques are true enablers for the development of conformal or 3-D metamaterial designs. This article will show examples of metamaterial structures developed at the Naval Research Laboratory using non-lithographic processes. These processes have been applied successfully to the fabrication of complex 2-D and 3-D structures comprising different types of materials.
C1 [Pique, Alberto; Charipar, Nicholas A.; Kim, Heungsoo; Kirleis, Matthew A.; Auyeung, Ray C. Y.; Metkus, Kristin M.; Mathews, Scott A.] USN, Res Lab, Div Mat Sci & Technol, Code 6364, Washington, DC 20375 USA.
[Smith, Andrew T.] Nova Res Inc, Alexandria, VA 22308 USA.
RP Pique, A (reprint author), USN, Res Lab, Div Mat Sci & Technol, Code 6364, Washington, DC 20375 USA.
EM pique@nrl.navy.mil
FU Office of Naval Research
FX This work was sponsored by the Office of Naval Research
NR 19
TC 1
Z9 1
U1 1
U2 11
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9172-5
J9 PROC SPIE
PY 2012
VL 8455
AR 845514
DI 10.1117/12.932649
PG 10
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA BCY18
UT WOS:000311964300008
ER
PT S
AU Lane, PA
Wolak, MA
Cunningham, PD
Melinger, JS
AF Lane, Paul A.
Wolak, Mason A.
Cunningham, Paul D.
Melinger, Joseph S.
BE So, F
Adachi, C
TI Energy Transfer and Excitation Migration in Organic Semiconductors
SO ORGANIC LIGHT EMITTING MATERIALS AND DEVICES XVI
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Organic Light Emitting Materials and Devices XVI
CY AUG 12-15, 2012
CL San Diego, CA
SP SPIE
AB Energy transfer plays a key role in various applications of organic semiconductors such as electroluminescence, photovoltaics, and sensors. We have carried out a study combining transient and continuous wave (CW) optical spectroscopy with modeling. The fluorescence spectra and dynamics of a functionalized pentacene doped into a fluorescent host (Alq3) were measured and simulated by a Monte Carlo model incorporating distributed dopants and exciton migration. For nonluminescent materials, transient absorption spectroscopy provides insight into excitation migration. Singlet diffusion rates in C60 were determined by probing delayed charge transfer to ZnPc in films with a layered nanostructure.
C1 [Lane, Paul A.; Wolak, Mason A.; Cunningham, Paul D.; Melinger, Joseph S.] USN, Res Lab, Washington, DC 20375 USA.
RP Lane, PA (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
NR 3
TC 0
Z9 0
U1 2
U2 15
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9193-0
J9 PROC SPIE
PY 2012
VL 8476
AR 84760I
DI 10.1117/12.930055
PG 4
WC Materials Science, Multidisciplinary; Optics
SC Materials Science; Optics
GA BCY45
UT WOS:000312027600008
ER
PT J
AU Gaglione, AM
Lipschutz, S
Spellman, D
AF Gaglione, Anthony M.
Lipschutz, Seymour
Spellman, Dennis
TI NOTE ON A QUESTION OF REINHOLD BAER ON PREGROUPS II
SO PUBLICATIONS DE L INSTITUT MATHEMATIQUE-BEOGRAD
LA English
DT Article
ID STALLINGS PREGROUP
AB Reinhold Baer asked the relationship between certain properties in a nonempty set P with a partial operation (called an "add" by Baer [1]). The first paper in our sequence [Paper I] answered his question for a special type of an add called a pregroup by Stallings [12]. This paper [Paper II] answers an analogous question for a wider class of adds.
C1 [Gaglione, Anthony M.] USN Acad, Dept Math, Annapolis, MD 21402 USA.
[Lipschutz, Seymour] Temple Univ, Dept Math, Philadelphia, PA 19122 USA.
[Spellman, Dennis] Temple Univ, Dept Stat, Philadelphia, PA 19122 USA.
RP Gaglione, AM (reprint author), USN Acad, Dept Math, Annapolis, MD 21402 USA.
EM amg@usna.edu; seymour@temple.edu; dennis.spellman@temple.edu
NR 12
TC 0
Z9 0
U1 0
U2 1
PU PUBLICATIONS L INSTITUT MATHEMATIQUE MATEMATICKI
PI BEOGRAD
PA KNEZA MIHAILA 36, BEOGRAD, 1101, SERBIA
SN 0350-1302
J9 PUBL I MATH-BEOGRAD
JI Publ. Inst. Math.-Beograd
PY 2012
VL 92
IS 106
BP 109
EP 115
DI 10.2298/PIM1206109G
PG 7
WC Mathematics
SC Mathematics
GA 051HM
UT WOS:000312117200008
ER
PT J
AU Choi, W
Rho, J
Han, DK
Ko, H
AF Choi, Woohyun
Rho, Jinsang
Han, David K.
Ko, Hanseok
GP IEEE
TI Selective Background Adaptation Based Abnormal Acoustic Event
Recognition for Audio Surveillance
SO 2012 IEEE NINTH INTERNATIONAL CONFERENCE ON ADVANCED VIDEO AND
SIGNAL-BASED SURVEILLANCE (AVSS)
LA English
DT Proceedings Paper
CT 9th IEEE International Conference on Advanced Video and Signal-Based
Surveillance (AVSS)
CY SEP 18-21, 2012
CL Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing,
PEOPLES R CHINA
SP IEEE, IEEE Comp Soc, IEEE Signal Proc Soc
HO Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit
DE Audio surveillance; abnormal acoustic event recognition; background
adaptation
AB In this paper, a method for abnormal acoustic event recognition in an audio surveillance system is presented. We propose a recognition scheme based on a hierarchical structure using a feature combination of Mel-Frequency Cepstral Coefficient (MFCC), timbre, and spectral statistics. A selective background adaptation is proposed for robust abnormal acoustic event recognition in real-world situations. For training, we use a database containing 9 abnormal events (scream, glass breaking, and etc.) and 6 background noise types collected under various surveillance situations. Gaussian Mixture Model (GMM) is considered for classifying the representative abnormal acoustic events and for selecting the background noise for adaptation. Effectiveness of the proposed method is demonstrated via representative experimental results.
C1 [Choi, Woohyun; Rho, Jinsang; Ko, Hanseok] Korea Univ, Sch Elect Engn, Seoul, South Korea.
[Han, David K.] Off Naval Res, Ocean Engn & Marine Syst, Arlington, VA USA.
RP Choi, W (reprint author), Korea Univ, Sch Elect Engn, Seoul, South Korea.
EM whchoi@ispl.korea.ac.kr; jsrho@ispl.korea.ac.kr; ctmkhan@gmail.com;
hsko@korea.ac.kr
FU Seoul R BD Program [WR080951]
FX This research was supported by Seoul R& BD Program (WR080951).
NR 23
TC 6
Z9 6
U1 0
U2 3
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
BN 978-0-7695-4797-8
PY 2012
BP 118
EP 123
DI 10.1109/AVSS.2012.65
PG 6
WC Engineering, Electrical & Electronic
SC Engineering
GA BCX63
UT WOS:000311849200021
ER
PT J
AU Bae, J
Ku, B
Han, DK
Ko, H
AF Bae, Jeongmin
Ku, Bonwha
Han, David K.
Ko, Hanseok
GP IEEE
TI Combining Infrared and Visible Images using Novel Transform and
Statistical Information
SO 2012 IEEE NINTH INTERNATIONAL CONFERENCE ON ADVANCED VIDEO AND
SIGNAL-BASED SURVEILLANCE (AVSS)
LA English
DT Proceedings Paper
CT 9th IEEE International Conference on Advanced Video and Signal-Based
Surveillance (AVSS)
CY SEP 18-21, 2012
CL Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing,
PEOPLES R CHINA
SP IEEE, IEEE Comp Soc, IEEE Signal Proc Soc
HO Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit
DE Image fusion; Image processing; LWIR
ID PERFORMANCE
AB This paper proposes a novel combining method of infrared (IR) and visible images based on a Discrete Wavelet Frame (DWF) approach. In contrast to existing methods, IR image is transformed first using statistical information of the visible image to emphasize relevant information. In a multiscale domain, we then assign appropriate weights to each pixel of sub-band approximation images through pixel level weighted average for emphasizing relevant information of the IR image while keeping texture information of the visible image. Representative experiments show that the proposed method outperforms exiting methods in image quality.
C1 [Bae, Jeongmin] Korea Univ, Dept Visual Informat Proc, Seoul, South Korea.
[Han, David K.] Off Naval Res, Arlington, VA USA.
[Ku, Bonwha; Ko, Hanseok] Korea Univ, Sch Elect Engn, Seoul, South Korea.
RP Bae, J (reprint author), Korea Univ, Dept Visual Informat Proc, Seoul, South Korea.
EM jmbae@ispl.korea.ac.kr; bhku@ispl.korea.ac.kr; ctmkhan@gmail.com;
hsko@korea.ac.kr
FU Seoul R BD Program [WR080951]
FX This research was supported by Seoul R& BD Program (WR080951)
NR 10
TC 1
Z9 1
U1 0
U2 0
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
BN 978-0-7695-4797-8
PY 2012
BP 149
EP 153
DI 10.1109/AVSS.2012.24
PG 5
WC Engineering, Electrical & Electronic
SC Engineering
GA BCX63
UT WOS:000311849200026
ER
PT J
AU Edwankar, CR
Edwankar, RV
Deschamps, JR
Cook, JM
AF Edwankar, Chitra R.
Edwankar, Rahul V.
Deschamps, Jeffrey R.
Cook, James M.
TI Nature-Inspired Stereospecific Total Synthesis of P-(+)-Dispegatrine and
Four Other Monomeric Sarpagine Indole Alkaloids
SO ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
LA English
DT Article
DE alkaloids; biaryls; C-C coupling; natural product synthesis; thallium
ID BIOLOGY-ORIENTED SYNTHESIS; BIARYL COUPLING REACTION; THALLIUM(III)
TRIFLUOROACETATE; AROMATIC NUCLEI; PRODUCTS; DISCOVERY; BIOSYNTHESIS;
MACROLINE; WELL
C1 [Edwankar, Chitra R.; Edwankar, Rahul V.; Cook, James M.] Univ Wisconsin, Dept Chem & Biochem, Milwaukee, WI 53201 USA.
[Deschamps, Jeffrey R.] USN, Res Lab, Ctr Biomol Sci & Engn, Washington, DC 20375 USA.
RP Cook, JM (reprint author), Univ Wisconsin, Dept Chem & Biochem, 3210 N Cramer St, Milwaukee, WI 53201 USA.
EM capncook@uwm.edu
OI Deschamps, Jeffrey/0000-0001-5845-0010
FU NIMH; Lynde and Harry Bradley Foundation; NIDA-NRL Interagency
[Y1-DA1101]
FX We wish to acknowledge the NIMH (in part) and the Lynde and Harry
Bradley Foundation for support of this work. X-ray crystallographic
studies were carried out at the Naval Research Laboratory and supported
by NIDA-NRL Interagency Agreement Number Y1-DA1101.
NR 50
TC 21
Z9 21
U1 1
U2 33
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1433-7851
J9 ANGEW CHEM INT EDIT
JI Angew. Chem.-Int. Edit.
PY 2012
VL 51
IS 47
BP 11762
EP 11765
DI 10.1002/anie.201206015
PG 4
WC Chemistry, Multidisciplinary
SC Chemistry
GA 045MY
UT WOS:000311702000017
PM 23073985
ER
PT J
AU Bertozzi, AL
Flenner, A
AF Bertozzi, Andrea L.
Flenner, Arjuna
TI DIFFUSE INTERFACE MODELS ON GRAPHS FOR CLASSIFICATION OF HIGH
DIMENSIONAL DATA
SO MULTISCALE MODELING & SIMULATION
LA English
DT Article
DE Nystrom extension; diffuse interfaces; image processing; high
dimensional data
ID CAHN-HILLIARD EQUATION; NYSTROM METHOD; SEGMENTATION; REGULARIZATION;
DECONVOLUTION; ALGORITHM; JUNCTIONS; IMAGES
AB There are currently several communities working on algorithms for classification of high dimensional data. This work develops a class of variational algorithms that combine recent ideas from spectral methods on graphs with nonlinear edge/region detection methods traditionally used in the PDE-based imaging community. The algorithms are based on the Ginzburg-Landau functional which has classical PDE connections to total variation minimization. Convex-splitting algorithms allow us to quickly find minimizers of the proposed model and take advantage of fast spectral solvers of linear graph-theoretic problems. We present diverse computational examples involving both basic clustering and semisupervised learning for different applications. Case studies include feature identification in images, segmentation in social networks, and segmentation of shapes in high dimensional datasets.
C1 [Bertozzi, Andrea L.] Univ Calif Los Angeles, Dept Math, Los Angeles, CA 90095 USA.
[Flenner, Arjuna] USN, Air Weap Ctr, China Lake, CA USA.
RP Bertozzi, AL (reprint author), Univ Calif Los Angeles, Dept Math, Los Angeles, CA 90095 USA.
EM bertozzi@math.ucla.edu; arjuna.flenner@navy.mil
RI Bertozzi, Andrea/A-1831-2012
OI Bertozzi, Andrea/0000-0003-0396-7391
FU ONR [N000140810363, N000141010221, N000141210040, N0001411AF00002]; NSF
[DMS-0914856, DMS-1118971]; AFOSR MURI [FA9550-10-1-0569]
FX This research was supported by ONR grants N000140810363, N000141010221,
N000141210040, and N0001411AF00002; NSF grants DMS-0914856 and
DMS-1118971; and AFOSR MURI grant FA9550-10-1-0569. This work was
performed by an employee of the U.S. Government or under U.S. Government
contract. The U.S. Government retains a nonexclusive, royalty-free
license to publish or reproduce the published form of this contribution,
or allow others to do so, for U.S. Government purposes. Copyright is
owned by SIAM to the extent not limited by these rights.
NR 57
TC 27
Z9 27
U1 0
U2 4
PU SIAM PUBLICATIONS
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
SN 1540-3459
EI 1540-3467
J9 MULTISCALE MODEL SIM
JI Multiscale Model. Simul.
PY 2012
VL 10
IS 3
BP 1090
EP 1118
DI 10.1137/11083109X
PG 29
WC Mathematics, Interdisciplinary Applications; Physics, Mathematical
SC Mathematics; Physics
GA 044NX
UT WOS:000311628100017
ER
PT J
AU Lumb, MP
Yakes, MK
Gonzalez, M
Hoheisel, R
Baile, CG
Yoon, W
Walters, RJ
AF Lumb, M. P.
Yakes, M. K.
Gonzalez, M.
Hoheisel, R.
Baile, C. G.
Yoon, W.
Walters, R. J.
GP IEEE
TI Development of Tunnel Junctions with High Peak Tunneling Currents for
InP-based Multi-junction Solar Cells
SO 2012 38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
LA English
DT Proceedings Paper
CT 38th IEEE Photovoltaic Specialists Conference (PVSC)
CY JUN 03-08, 2012
CL Austin, TX
SP IEEE, IEEE Electron Devides Soc (EDS), IEEE Photon Soc, IEEE Power & Energy Soc (PES), HelioVolt Corp, SunShot, US Dept Energy
DE tunneling; photovoltaic cells; III-V semiconductor materials; quantum
wells
AB In this work we developed lattice-matched InAIGaAs tunnel junctions for an InP-based multi-junction cell. We discuss the design and modeling of the device architecture and present results from the growth and characterization of a range of test structures. The impact of dopant diffusion during the overgrowth of subcells on the performance of the tunnel junctions was characterized using both electrical measurements and SIMS. We investigated different structures to mitigate the effects of dopant diffusion and maximize the peak tunnel current, achieving a peak tunnel current of 28.9 A/cm(2) using a bulk, double heterostructure design, compared to the baseline bulk device with a peak tunnel current of 2.3 A/cm(2). We have also investigated a structure incorporating two InGaAs quantum wells to facilitate the interband tunneling via the confined electron and hole states in the quantum wells. This improved the tunneling current to 113 A/cm(2) with only a small impact on the transparency of the tunnel junction.
C1 [Lumb, M. P.; Hoheisel, R.] George Washington Univ, 2121 I St NW, Washington, DC 20037 USA.
[Lumb, M. P.; Yakes, M. K.; Gonzalez, M.; Hoheisel, R.; Baile, C. G.; Yoon, W.; Walters, R. J.] US Naval Res Lab, Washington, DC 20037 USA.
[Gonzalez, M.] Sotera Def Solut, Crofton, MD 21114 USA.
RP Lumb, MP (reprint author), George Washington Univ, 2121 I St NW, Washington, DC 20037 USA.
RI Yakes, Michael/E-5510-2011; Yoon, Woojun/H-9734-2013
OI Yoon, Woojun/0000-0002-1946-5372
FU Office of Naval Research
FX The author would like to thank Josh Abell, Chaffra Affouda and Joe
Tischler for valuable contributions to this work. This work was
supported by the Office of Naval Research
NR 12
TC 2
Z9 2
U1 0
U2 9
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0066-7
PY 2012
BP 949
EP 953
PG 5
WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied
SC Energy & Fuels; Engineering; Physics
GA BCD90
UT WOS:000309917801053
ER
PT J
AU Jenkins, P
Messenger, S
Trautz, K
Maximenko, S
Goldstein, D
Scheiman, D
Walters, R
AF Jenkins, Phillip
Messenger, Scott
Trautz, Kelly
Maximenko, Sergey
Goldstein, David
Scheiman, David
Walters, Robert
GP IEEE
TI High Band Gap Solar Cells for Underwater Photovoltaic Applications
SO 2012 38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
LA English
DT Proceedings Paper
CT 38th IEEE Photovoltaic Specialists Conference (PVSC)
CY JUN 03-08, 2012
CL Austin, TX
SP IEEE, IEEE Electron Devides Soc (EDS), IEEE Photon Soc, IEEE Power & Energy Soc (PES), HelioVolt Corp, SunShot, US Dept Energy
DE photovoltaic cell; III-V semiconductor materials; spectral shape;
underwater technology
AB The use of autonomous systems to provide situational awareness and long-term environment monitoring is increasing. Photovoltaics (PV) has been favored as a long-endurance power source for many of these applications. To date the use of PV has been limited to space and terrestrial (dry land) installations. The need for an extended power source also exists for underwater (UW) systems, which currently rely on surface PV arrays or batteries. In this paper we demonstrate that high band gap InGaP solar cells can provide useful power underwater.
C1 [Jenkins, Phillip; Messenger, Scott; Trautz, Kelly; Goldstein, David; Scheiman, David; Walters, Robert] USN, Res Lab, Washington, DC 20375 USA.
RP Jenkins, P (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 6
TC 1
Z9 1
U1 1
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0066-7
PY 2012
BP 2061
EP 2064
PG 4
WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied
SC Energy & Fuels; Engineering; Physics
GA BCD90
UT WOS:000309917802079
ER
PT J
AU Yoon, W
Foos, EE
Lumb, MP
Tischler, JG
AF Yoon, W.
Foos, E. E.
Lumb, M. P.
Tischler, J. G.
GP IEEE
TI Solution Processing of CdTe Nanocrystals for Thin-film Solar Cells
SO 2012 38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
LA English
DT Proceedings Paper
CT 38th IEEE Photovoltaic Specialists Conference (PVSC)
CY JUN 03-08, 2012
CL Austin, TX
SP IEEE, IEEE Electron Devides Soc (EDS), IEEE Photon Soc, IEEE Power & Energy Soc (PES), HelioVolt Corp, SunShot, US Dept Energy
DE solution; nanocrystal; thin-film; CdTe; heterostructure; photovoltaic
ID LAYER
AB We describe solution-processed sintered nanocrystal solar cells. As the absorber layer, thin-films of CdTe nanocrystals were deposited using a layer-by-Iayer spin coating process. For Schottky barrier solar cells (ITO/CdTe/Ca/AI), an efficiency of 3.0+/-0.3% with V-oc= 0.53+/-0.03 V, J(sc)= 13.2+/-0. 2 mA/cm(2), and FF= 43.1+/-4.2% was measured under AM1.5G conditions. In order to overcome the limitations associated with the Schottky barrier structure, heterojunction solar cells incorporating solution-processed CdSe nanocrystals as an n-type layer were fabricated and characterized. Under darkness, heterojunction devices (ITO/CdTe/CdSe/AI) showed an improved current rectification ratio of 4.53x10(2) at +/-1 V in comparison to Schottky barrier solar cells, indicating that a well-defined junction is formed between CdSe and CdTe. Under illumination (AM1.5G), the devices exhibited an average efficiency of similar to 2% with V-oc= 0.50+/-0.02 V.
C1 [Yoon, W.; Foos, E. E.; Lumb, M. P.; Tischler, J. G.] USN, Res Lab, Washington, DC 20375 USA.
RP Yoon, W (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
RI Yoon, Woojun/H-9734-2013
OI Yoon, Woojun/0000-0002-1946-5372
NR 7
TC 3
Z9 3
U1 1
U2 7
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0066-7
PY 2012
BP 2621
EP 2624
PG 4
WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied
SC Energy & Fuels; Engineering; Physics
GA BCD90
UT WOS:000309917802207
ER
PT J
AU Yakes, MK
Cress, CD
Lumb, MP
Warner, JH
Bailey, CG
Hoheisel, R
Walters, RJ
AF Yakes, M. K.
Cress, C. D.
Lumb, M. P.
Warner, J. H.
Bailey, C. G.
Hoheisel, R.
Walters, R. J.
GP IEEE
TI Bandgap Engineering Achieved with Doping Superlattices
SO 2012 38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
LA English
DT Proceedings Paper
CT 38th IEEE Photovoltaic Specialists Conference (PVSC)
CY JUN 03-08, 2012
CL Austin, TX
SP IEEE, IEEE Electron Devides Soc (EDS), IEEE Photon Soc, IEEE Power & Energy Soc (PES), HelioVolt Corp, SunShot, US Dept Energy
DE nipi; doping superlattice; band structure engineering; GaAs photovoltaic
ID ENHANCEMENT; ABSORPTION
AB Tailoring bandgaps by introducing quantum wells into the intrinsic region of a solar cell has been shown to improve the energy conversion of these devices. Doping superlattices are a potential way to achieve sub-bandgap absorption in a photovoltaic device without the need to introduce additional materials or strain balancing. In this paper we investigate the inclusion of doping superlattices in between the base and emitter regions of a photodiode. External quantum efficiency measurements of these devices demonstrate increased absorption below the GaAs band edge with respect to a GaAs reference cell. AM0 Illuminated J-V measurements of these devices exhibited variable results with PN configuration resulting in 0.81 V open circuit voltage and 7.7 mA/cm(2) short circuit current density. Dark J-V curves show a negative differential resistance region indicating tunneling between the n and p doped regions of the doping superlattice. These results suggest that doping induced superlattices may be an effective way to promote subgap photocurrent in a single junction GaAs cell. Additionally, a subcell in a multi-junction stack could employ this structure utilizing the increased design flexibility as compared to conventional heterojunction quantum well solar cells.
C1 [Yakes, M. K.; Cress, C. D.; Lumb, M. P.; Warner, J. H.; Bailey, C. G.; Hoheisel, R.; Walters, R. J.] USN, Res Lab, Washington, DC 20375 USA.
RP Yakes, MK (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
RI Yakes, Michael/E-5510-2011;
OI Cress, Cory/0000-0001-7563-6693
NR 13
TC 0
Z9 0
U1 1
U2 5
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0066-7
PY 2012
BP 2979
EP 2984
PG 6
WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied
SC Energy & Fuels; Engineering; Physics
GA BCD90
UT WOS:000309917803059
ER
PT J
AU Frantz, JA
Bekele, RY
Myers, JD
Nguyen, VQ
Sanghera, JS
Maximenko, SI
Gonzalez, M
Tischler, JG
Walters, RJ
Leite, MS
Bruce, A
Frolov, SV
Cyrus, M
AF Frantz, Jesse A.
Bekele, Robel Y.
Myers, Jason D.
Nguyen, Vinh Q.
Sanghera, Jasbinder S.
Maximenko, Sergey I.
Gonzalez, Maria
Tischler, Joseph G.
Walters, Robert J.
Leite, Marina S.
Bruce, Allan
Frolov, Sergey V.
Cyrus, Michael
GP IEEE
TI Structural and Electronic Characteristics of Cu(In,Ga)Se-2 Thin Films
Sputtered From Quaternary Targets
SO 2012 38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
LA English
DT Proceedings Paper
CT 38th IEEE Photovoltaic Specialists Conference (PVSC)
CY JUN 03-08, 2012
CL Austin, TX
SP IEEE, IEEE Electron Devides Soc (EDS), IEEE Photon Soc, IEEE Power & Energy Soc (PES), HelioVolt Corp, SunShot, US Dept Energy
DE copper compounds; grain size; photovoltaic cells; solar energy;
sputtering; thin film devices; thin films
AB Although the advantages of sputter deposition for large area, uniform deposition are well known, it has long been believed that sputtering Cu(In,Ga)Se-2 (CIGS) from a quaternary sputtering target yields films with morphological and electronic properties that make them unsuitable for use in high-efficiency photovoltaic devices. Recent work, however, has demonstrated that this deposition method can produce dense, polycrystalline, highly oriented films with the desired stoichiometry. Devices built with these films exhibit efficiencies >10%. While effective parameters for target composition and deposition conditions have been achieved, variation from these conditions can result in a wide array of morphologies, even while composition remains near that of stoichiometric CIGS. In this paper, we review the broad range of structural and electronic properties that result from various sets of target compositions and deposition conditions. Films deposited under some conditions are similar in important respects - their composition, a dense structure composed of similar to 1 mu m sized grains, and the presence of a MoSe2 layer - to those of evaporated CIGS. We discuss how these results point towards the possibility of higher-efficiency sputtered CIGS.
C1 [Frantz, Jesse A.; Myers, Jason D.; Nguyen, Vinh Q.; Sanghera, Jasbinder S.; Tischler, Joseph G.; Walters, Robert J.] USN, Res Lab, Washington, DC 20375 USA.
[Bekele, Robel Y.] Univ Res Fdn, Greenbelt, MD 20770 USA.
[Maximenko, Sergey I.; Gonzalez, Maria] Sotera Def Solut, Crofton, MD 21114 USA.
[Leite, Marina S.] CNST, Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
[Leite, Marina S.] Univ Maryland, Maryland Nanoctr, College Pk, MD 20742 USA.
[Bruce, Allan; Frolov, Sergey V.; Cyrus, Michael] Sunlight Photon Inc, South Plainfield, NJ 07080 USA.
RP Frantz, JA (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 6
TC 1
Z9 1
U1 2
U2 9
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0066-7
PY 2012
BP 3098
EP 3101
PG 4
WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied
SC Energy & Fuels; Engineering; Physics
GA BCD90
UT WOS:000309917803085
ER
PT J
AU Bittner, ZS
Forbes, DV
Bailey, CG
Polly, SJ
Slocum, MA
Kerestes, C
Hubbard, SM
AF Bittner, Zachary S.
Forbes, David V.
Bailey, Christopher G.
Polly, Stephen J.
Slocum, Michael A.
Kerestes, Christopher
Hubbard, Seth M.
GP IEEE
TI Characterization of InGaP Heterojunction Emitter Quantum Dot Solar Cells
SO 2012 38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
LA English
DT Proceedings Paper
CT 38th IEEE Photovoltaic Specialists Conference (PVSC)
CY JUN 03-08, 2012
CL Austin, TX
SP IEEE, IEEE Electron Devides Soc (EDS), IEEE Photon Soc, IEEE Power & Energy Soc (PES), HelioVolt Corp, SunShot, US Dept Energy
DE GaAs; InAs Quantum Dot; Heterojunction; InGaP; Photovoltaics
ID EFFICIENCY
AB Heterojunction emitter InAs/GaAs quantum dot solar cells (QDSC) with an In0.48Ga0.52P (InGaP) n-type emitter and p-type GaAs base were fabricated along with homojunction nip solar cells in order to enable sub-cell polarity compatibility of InAs/GaAs QDSCs with current state-of-the-art monolithic InGaP/GaAs/Ge triple junction solar cells for space applications and to investigate potential dark current suppression effects and electronic field enhancement effects on carrier collection in InAs/GaAs QDSC. Quantum dot solar cells with one-Sun AM0 open circuit voltages greater than 970 mV were fabricated as compared to a 1.020 V heterojunction emitter 'control' sample. Preliminary testing showed a reduction in short circuit current density from homojunction to heterojunction GaAs solar cells, primarily from changes in reflection and uncollected absorption in the InGaP emitter.
C1 [Bittner, Zachary S.; Forbes, David V.; Polly, Stephen J.; Slocum, Michael A.; Kerestes, Christopher; Hubbard, Seth M.] Rochester Inst Technol, NanoPower Res Lab, Rochester, NY 14623 USA.
[Bailey, Christopher G.] US Naval Res Lab, Washington, DC USA.
RP Bittner, ZS (reprint author), Rochester Inst Technol, NanoPower Res Lab, Rochester, NY 14623 USA.
RI Slocum, Michael/B-9063-2013; Polly, Stephen/C-1776-2015
OI Slocum, Michael/0000-0002-0434-8632; Polly, Stephen/0000-0002-7563-6738
FU U.S. Government, the Department of Energy [DE-FG36-08GO18012]; NASA
[SAA3 844]
FX The author of this work would like to thank Elias Fernandez for
assistance in fabrication of the devices in this study, and Matthew Lumb
for providing optical parameters for AlInP. This work was supported by
the U.S. Government, the Department of Energy (DE-FG36-08GO18012) as
well as NASA through SAA3 844.
NR 15
TC 0
Z9 0
U1 1
U2 6
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0066-7
PY 2012
BP 3158
EP 3161
PG 4
WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied
SC Energy & Fuels; Engineering; Physics
GA BCD90
UT WOS:000309917803098
ER
PT J
AU Messenger, SR
Jackson, EA
Warner, JH
Walters, RJ
AF Messenger, Scott R.
Jackson, Eric A.
Warner, Jeffrey H.
Walters, Robert J.
GP IEEE
TI Advancements to SCREAM: Multiple Spectrum Input and ShielDDDose Options
SO 2012 38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
LA English
DT Proceedings Paper
CT 38th IEEE Photovoltaic Specialists Conference (PVSC)
CY JUN 03-08, 2012
CL Austin, TX
SP IEEE, IEEE Electron Devides Soc (EDS), IEEE Photon Soc, IEEE Power & Energy Soc (PES), HelioVolt Corp, SunShot, US Dept Energy
DE displacement damage; modelling; nonionizing energy loss; radiation
effects; photovoltaic cells; space technology
ID NONIONIZING ENERGY-LOSS; DISPLACEMENT DAMAGE; DEVICE APPLICATIONS;
SPACE; NIEL
AB The SCREAM (Solar Cell Radiation Environment Analysis Models) software package, developed by the US Naval Research Laboratory implementing the displacement damage dose (DDD) modelling methodology for space solar cell radiation degradation analyses, has several new features to help in solar array design. The ShielDDDose and multispectrum input improvements are described.
C1 [Messenger, Scott R.; Jackson, Eric A.; Warner, Jeffrey H.; Walters, Robert J.] USN, Res Lab, Washington, DC 20375 USA.
RP Messenger, SR (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 16
TC 4
Z9 4
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0066-7
PY 2012
BP 3281
EP 3286
PG 6
WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied
SC Energy & Fuels; Engineering; Physics
GA BCD90
UT WOS:000309917803125
ER
PT J
AU Dai, YS
Bailey, CG
Kerestes, C
Forbes, DV
Hubbard, SM
AF Dai, Yushuai
Bailey, Christopher G.
Kerestes, Christopher.
Forbes, David V.
Hubbard, Seth M.
GP IEEE
TI Investigation of Carrier Escape Mechanism in InAs/GaAs Quantum Dot Solar
Cells
SO 2012 38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
LA English
DT Proceedings Paper
CT 38th IEEE Photovoltaic Specialists Conference (PVSC)
CY JUN 03-08, 2012
CL Austin, TX
SP IEEE, IEEE Electron Devides Soc (EDS), IEEE Photon Soc, IEEE Power & Energy Soc (PES), HelioVolt Corp, SunShot, US Dept Energy
DE carrier escape; thermal escape; tunneling; photovoltaic cells
AB In order to enhance understanding of the short circuit improvement in InAs/GaAs quantum dot (QD) solar cells, the thermally assisted and tunneling mechanisms of carrier escape from the QD quantum confinement are investigated. The dependence of voltage biased spectral responsivity for QD solar cells at room temperature is studied to analyze carrier extraction through tunneling. Photoexcited carrier confinement and escape were also studied by means of temperature dependent spectral response (TDSR) and temperature dependent photoluminescence (TDPL). Energy required to move a carrier from the ground state to the first excited state, thermal activation energy (Ea), in a quantum dot is calculated from TDPL to be 114 meV. It is found that at room temperature carrier escape from the quantum dot confinement is affected by both thermal assisted escape and tunneling while at low temperature tunneling is the dominant in carrier escape from both wetting layer and QDs. For all temperature ranges, carrier exchange between ground states and excited states and carrier escape from ground states (GS) is first thermal escape to excited states (ES) then tunneling
C1 [Dai, Yushuai; Kerestes, Christopher.; Forbes, David V.; Hubbard, Seth M.] Rochester Inst Technol, NanoPower Res Lab, Rochester, NY 14623 USA.
[Bailey, Christopher G.] Naval Res Lab, Washington, DC 20375 USA.
RP Dai, YS (reprint author), Rochester Inst Technol, NanoPower Res Lab, Rochester, NY 14623 USA.
FU National Science Foundation [DMR- 0955752]; Department of Energy
[DE-FG36-08G0l8012]; NASA [SAA3-844]
FX The authors would like to thank Chelsea Mackos (now with Emcore
Corporation) and the staff of the NanoPower Research Laboratory at
Rochester Institute of Technology. This work was supported by the
National Science Foundation (DMR- 0955752) and the Department of Energy
(DE-FG36-08G0l8012) as well as NASA through SAA3-844.
NR 22
TC 0
Z9 0
U1 0
U2 6
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0066-7
PY 2012
PG 6
WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied
SC Energy & Fuels; Engineering; Physics
GA BCD90
UT WOS:000309917800010
ER
PT J
AU Polly, SJ
Bittner, ZS
Bailey, CG
Forbes, DV
Dai, Y
Hubbard, SM
AF Polly, Stephen J.
Bittner, Zachary S.
Bailey, Christopher G.
Forbes, David V.
Dai, Yushuai
Hubbard, Seth M.
GP IEEE
TI Low Temperature Analysis of Quantum Dot Solar Cells
SO 2012 38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
LA English
DT Proceedings Paper
CT 38th IEEE Photovoltaic Specialists Conference (PVSC)
CY JUN 03-08, 2012
CL Austin, TX
SP IEEE, IEEE Electron Devides Soc (EDS), IEEE Photon Soc, IEEE Power & Energy Soc (PES), HelioVolt Corp, SunShot, US Dept Energy
DE In As; Quantum Dot; Tunneling; Two-Photon
ID DIODES
AB he low temperature operation of GaAs solar cells incorporating a superlattice ofInAs quantum dots (QD) was studied to explore carrier removal mechanisms. Dark currentvoltage characteristics of QD devices did not show a temperature dependence, which suggests a tunneling-dominated recombination mechanism. Two-photon extraction was investigated using a pump-probe method, but no evidence of twophoton was observed. Finally, I-sun measurements revealed a resonant-tunneling contribution to the current in the QD devices, which became prominent as temperature was reduced.
C1 [Polly, Stephen J.; Bittner, Zachary S.; Forbes, David V.; Dai, Yushuai; Hubbard, Seth M.] Rochester Inst Technol, Rochester, NY 14623 USA.
[Bailey, Christopher G.] US Navy, Res Lab, Washington, DC 20375 USA.
RP Polly, SJ (reprint author), Rochester Inst Technol, Rochester, NY 14623 USA.
RI Polly, Stephen/C-1776-2015
OI Polly, Stephen/0000-0002-7563-6738
NR 15
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4673-0066-7
PY 2012
PG 5
WC Energy & Fuels; Engineering, Electrical & Electronic; Physics, Applied
SC Energy & Fuels; Engineering; Physics
GA BCD90
UT WOS:000309917800138
ER
PT J
AU Aravinda, S
Shamala, N
Karle, IL
Balaram, P
AF Aravinda, Subrayashastry
Shamala, Narayanaswamy
Karle, Isabella L.
Balaram, Padmanabhan
TI Characterization of bent helical conformations in polymorphic forms of a
designed 18-residue peptide containing a central gly-pro segment
SO BIOPOLYMERS
LA English
DT Article
DE Pro kink; bent helices; peptide helices; polymorphs; crystal structures;
X-ray diffraction
ID ALPHA-AMINOISOBUTYRIC-ACID; PROLINE RESIDUES; TRANSMEMBRANE HELICES; AIB
RESIDUES; PROTEINS; AGGREGATION; DYNAMICS; GEOMETRY; CRYSTAL; CHANNEL
AB An 18-residue sequence Boc-Aib-Val-Ala-Leu-Aib-Val-Ala-Leu-Gly-Pro-Val-Ala-Leu-Aib-Val-Ala-Leu-Aib-OMe (UK18) was designed to examine the effect of introducing a Gly-Pro segment into the middle of a potentially helical peptide. The crystal structures of two polymorphic forms yielded a view of the conformation of three independent molecules. Form 1 (space group P212121, a = 14.620 angstrom; b = 26.506 angstrom, c = 28.858 angstrom, Z = 4) has one molecule in the asymmetric unit, with one cocrystallized water molecule. Form 2 (space group P212121, a = 9.696 angstrom; b = 19.641 angstrom, c = 114.31 angstrom, Z = 8) has two molecules in the asymmetric unit with four cocrystallized water molecules. In Form 1, residues 1 to 18 adopt phi,psi values that lie in the right-handed helical (alpha R) region of the Ramachandran map. Two residues, Leu (8) (phi = -92.0 degrees,psi = -7.5 degrees) and Leu (17) (phi = -94.7 degrees, psi = -1.7 degrees) adopt conformations that deviate significantly from helical values. In Form 2, molecule A, residues 2 to 16 lie in the alpha R region of phi,psi space, with Leu (8) (phi = -94.9 degrees, psi = -2.9 degrees) deviating significantly from helical values. Aib (1) and Aib (18) adopt left-handed (alpha L) helical conformation. Significant distortion is observed at Leu (17) (phi = -121.3 degrees, psi = -31.3 degrees). Molecule B, Form 2, adopts a right-handed helix over residues 1 to 17. In all three molecules, a distinct bend in the helix is observed, with the bend angle values varying from 40.8 degrees to 58.9 degrees (c) 2011 Wiley Periodicals, Inc. Biopolymers (Pept Sci) 98: 7686, 2012.
C1 [Shamala, Narayanaswamy] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India.
[Karle, Isabella L.] USN, Struct Matter Lab, Res Lab, Washington, DC 20375 USA.
[Aravinda, Subrayashastry; Balaram, Padmanabhan] Indian Inst Sci, Mol Biophys Unit, Bangalore 560012, Karnataka, India.
RP Shamala, N (reprint author), Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India.
EM shamala@physics.iisc.ernet.in; pb@mbu.iisc.ernet.in
FU SERC FAST Track Young Scientist Fellowship From the Department of
Science and Technology; Department of Biotechnology, India
FX Contract grant sponsor: SERC FAST Track Young Scientist Fellowship From
the Department of Science and Technology; Contract grant sponsor:
Department of Biotechnology, India
NR 37
TC 2
Z9 2
U1 0
U2 4
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0006-3525
J9 BIOPOLYMERS
JI Biopolymers
PY 2012
VL 98
IS 1
BP 76
EP 86
DI 10.1002/bip.21697
PG 11
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 040QW
UT WOS:000311339000009
PM 21792844
ER
PT J
AU Qi, H
Rendell, RW
Glembocki, OJ
Prokes, SM
AF Qi, Hua
Rendell, R. W.
Glembocki, O. J.
Prokes, S. M.
TI Polarization Dependence of Surface Enhanced Raman Scattering on a Single
Dielectric Nanowire
SO JOURNAL OF NANOMATERIALS
LA English
DT Article
ID SELF-ASSEMBLED MONOLAYERS; GOLD NANOPARTICLES; SILVER; SPECTROSCOPY;
MOLECULE; ORIENTATION; FILMS; PHTHALOCYANINE; NANOSTRUCTURE; MICROSCOPY
AB Our measurements of surface enhanced Raman scattering (SERS) on Ga2O3 dielectric nanowires (NWs) core/silver composites indicate that the SERS enhancement is highly dependent on the polarization direction of the incident laser light. The polarization dependence of the SERS signal with respect to the direction of a single NW was studied by changing the incident light angle. Further investigations demonstrate that the SERS intensity is not only dependent on the direction and wavelength of the incident light, but also on the species of the SERS active molecule. The largest signals were observed on an NW when the incident 514.5 nm light was polarized perpendicular to the length of the NW, while the opposite phenomenon was observed at the wavelength of 785 nm. Our theoretical simulations of the polarization dependence at 514.5 nm and 785 nm are in good agreement with the experimental results.
C1 [Qi, Hua; Rendell, R. W.; Glembocki, O. J.; Prokes, S. M.] USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
RP Qi, H (reprint author), USN, Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA.
EM qhqihua@yahoo.com
FU Office of Naval Research (ONR) and Nanoscience Institute (NSI) of the US
Naval Research Laboratory
FX This work was partially supported by the Office of Naval Research (ONR)
and Nanoscience Institute (NSI) of the US Naval Research Laboratory. The
authors thank Dr. D.A. Alexson for his help during some data
collections.
NR 53
TC 0
Z9 0
U1 0
U2 9
PU HINDAWI PUBLISHING CORPORATION
PI NEW YORK
PA 410 PARK AVENUE, 15TH FLOOR, #287 PMB, NEW YORK, NY 10022 USA
SN 1687-4110
J9 J NANOMATER
JI J. Nanomater.
PY 2012
AR 946868
DI 10.1155/2012/946868
PG 9
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 041YQ
UT WOS:000311438400001
ER
PT S
AU Armstrong, JT
Jorgensen, AM
Neilson, HR
Mozurkewich, D
Baines, EK
Schmitt, HR
AF Armstrong, J. T.
Jorgensen, A. M.
Neilson, H. R.
Mozurkewich, D.
Baines, E. K.
Schmitt, H. R.
BE Delplancke, F
Rajagopal, JK
Malbet, F
TI Precise Stellar Diameters from Coherently Averaged Visibilities
SO OPTICAL AND INFRARED INTERFEROMETRY III
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Optical and Infrared Interferometry III
CY JUL 01-06, 2012
CL Amsterdam, NETHERLANDS
SP SPIE, Amer Astron Soc, Netherlands Inst Radio Astron (ASTRON), Ball Aerosp & Technol Corp, Canadian Astron Soc (CASCA), European Astron Soc, European So Observ (ESO), Int Astron Union, Korea Astron & Space Sci Inst (KASI), Natl Radio Astron Observ, POPSud, TNO
DE optical interferometry; NPOI; stellar diameters
ID PROGRAM
AB Optical interferometry is the only means of directly measuring the sizes of stars. The most precise angular diameter measurements, however, depend on measuring complex fringe visibilities V at spatial frequencies where Re(V) crosses zero. We can then use the spatial frequency B-perpendicular to/lambda(0) of the zero crossing as a measure of the stellar diameter via theta(UD,0) approximate to 1.22 lambda(0)/B-perpendicular to, where lambda(0) and is the wavelength at which Re(V) = 0 when observed with a baseline length B. projected toward the star, and theta(UD,0) is the equivalent uniform disk diameter. The variation in limb darkening with wavelength leads to a corresponding variation in theta(UD,0) with lambda, even at fixed B, which allows us to measure the limb darkening in detail and probe the structure of the atmosphere. However, in order to take meaningful data at those spatial frequencies, we need some form of bootstrapping, in wavelength, baseline length, or both. Reduction of these bootstrapped data benefits greatly from the increase in SNR offered by coherent averaging. We demonstrate the effect of limb darkening on theta(UD,0)(lambda) with simulated observations based on model atmospheres, and compare them to coherently averaged NPOI data.
C1 [Armstrong, J. T.; Baines, E. K.] Naval Res Lab, Washington, DC USA.
RP Armstrong, JT (reprint author), Naval Res Lab, Code 7215,4555 Overlook Ave,SW, Washington, DC USA.
EM tom.armstrong@nrl.navy.mil
OI Neilson, Hilding/0000-0002-7322-7236
NR 5
TC 1
Z9 1
U1 1
U2 3
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9146-6
J9 PROC SPIE
PY 2012
VL 8445
AR 84453K
DI 10.1117/12.926508
PG 6
WC Optics
SC Optics
GA BCB30
UT WOS:000309579600115
ER
PT J
AU Langland, RH
Maue, RN
AF Langland, Rolf H.
Maue, Ryan N.
TI Recent Northern Hemisphere mid-latitude medium-range deterministic
forecast skill
SO TELLUS SERIES A-DYNAMIC METEOROLOGY AND OCEANOGRAPHY
LA English
DT Article
DE numerical weather prediction; anomaly correlation coefficient; forecast
skill; Arctic Oscillation
ID OSCILLATION; PREDICTION; WINTER; MODEL; VERIFICATION; VARIABILITY;
PERFORMANCE; IMPACT
AB A multi-model archive of global deterministic forecasts and analyses from three operational systems is constructed to analyse recent Northern Hemisphere mid-latitude forecast skill from 2007 to 2012 and its relation to large-scale atmospheric flow anomalies defined by the Arctic Oscillation (AO) index. We find that the anomaly correlation coefficient (ACC) in 120-hr forecasts of 500 hPa geopotential height has similar variability on synoptic, monthly, and seasonal time scales in each of the three forecast systems examined here: the European Centre for Medium-Range Weather Forecasts, the National Centers for Environmental Prediction Global Forecast System, and the U. S. Navy Operational Global Atmospheric Prediction System. The results indicate that forecast skill as measured by the ACC is significantly correlated with the AO index and its transitions between negative and positive phase. Intervals of exceptionally high ACC skill during the 2009-2010 and 2010-2011 winters are associated with periods in which the AO remained in a persistent negative phase pattern. Episodes of low ACC, including so-called 'forecast skill dropouts' most frequently occur during transitions between negative and positive AO index and with positive AO index. The root mean square error (RMSE) of 120-hr forecast 500 hPa height is also modulated by the AO index, but to a lesser extent than the ACC. In two recent winters, the RMSE indicates lower 120-hr forecast accuracy during periods with negative AO index, which is opposite to 'skill' patterns provided by the ACC. These results suggest that the ACC is not in all situations an optimal metric with which to quantify model forecast skill, since the ACC can be higher when the large-scale atmospheric flow contains strong anomalies even if there is no actual improvement in model forecasts of that atmospheric state.
C1 [Langland, Rolf H.] USN, Res Lab, Marine Meteorol Div, Monterey, CA USA.
[Maue, Ryan N.] CNR, Postdoctoral Res Associate, Washington, DC 20418 USA.
RP Langland, RH (reprint author), USN, Res Lab, Marine Meteorol Div, Monterey, CA USA.
EM rolf.langland@nrlmry.navy.mil
FU National Research Council at the Naval Research Laboratory in Monterey,
California; ONR [PE-601153N]; NRL Base Program [PE 0602435N]
FX This research was performed while the second author held a National
Research Council Research Associateship Award at the Naval Research
Laboratory in Monterey, California from 2010 to 2012. ECMWF
deterministic forecast model data was obtained from the THORPEX
Interactive Grand Global Ensemble (TIGGE) ECMWF portal. NCEP GFS and
CFSR datasets were obtained from the NCDC NOAA Operational Model Archive
and Distribution System (NOMADS). Support from the sponsor ONR
PE-601153N for the first author is gratefully acknowledged. This
research is supported by the NRL Base Program, PE 0602435N. The helpful
comments of three manuscript reviewers are gratefully acknowledged.
NR 25
TC 3
Z9 3
U1 0
U2 9
PU CO-ACTION PUBLISHING
PI JARFALLA
PA RIPVAGEN 7, JARFALLA, SE-175 64, SWEDEN
SN 0280-6495
J9 TELLUS A
JI Tellus Ser. A-Dyn. Meteorol. Oceanol.
PY 2012
VL 64
AR 17531
DI 10.3402/tellusa.v64i0.17531
PG 10
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 039XD
UT WOS:000311280500001
ER
PT J
AU Bachmann, ER
Zmuda, M
Calusdian, J
Yun, XP
Hodgson, E
Waller, D
AF Bachmann, Eric R.
Zmuda, Michael
Calusdian, James
Yun, Xiaoping
Hodgson, Eric
Waller, David
BE Mehdi, Q
Elmaghraby, A
Marshall, I
Moreton, R
Ragade, R
Zapirain, BG
Chariker, J
ElSaid, M
Yampolskiy, R
Zhigiang, NL
TI Going Anywhere Anywhere Creating a Low Cost Portable Immersive VE System
SO 2012 17TH INTERNATIONAL CONFERENCE ON COMPUTER GAMES (CGAMES)
LA English
DT Proceedings Paper
CT 17th International Conference on Computer Games (CGAMES) - AI,
Animation, Mobile, Interactive Multimedia, Educational and Serious Games
CY JUL 30-AUG 01, 2012
CL Louisville, KY
SP Univ Wolverhampton, Sch Technol, Univ Louisville, J B Speed Sch Engn, IEEE Soc, IEEE Comp Soc, IEEE Comp Soc Tech Comm Simulat (TCSIM), IEEE Comp Soc (Louisville Chapter), Digital Games Res Assoc (DiGRA), Int Journal Intelligent Games & Simulat (IJIGS), Inst Gaming & Animat
DE Immersive Virtual Environment; Zero Velocity Updates; SLAM; Redirected
Walking
AB In general, the use of VE (Virtual Environment) systems has required users to travel to specialized facilities in which an expensive infrastructure has been pre-installed. Often these facilities allow only one user at a time, and users usually move through virtual worlds by means of an artificial interface device or a movement metaphor. In short, most VR facilities are centralized, specialized, and expensive, and have thus been relatively unavailable to a great majority of the population. This paper reports on the development of an innovative immersive VE system that is completely portable. The proposed system would allow multiple users to be immersed simultaneously and could be used in any large indoor or outdoor area such as a gymnasium or parking lot. Users will move through virtual worlds naturally, and will be able to walk for miles in a virtual world without ever becoming aware of the physical limits of the tracking space or the locations of other users. The portable system will cost far less than current systems. The research hinges on three emerging techniques. The first is redirected walking (RDW). The second is self-contained inertial position tracking (SCIPT). The last is the use of ultrasonic and/or laser ranging systems to simultaneously localize and map (SLAM) within an unfamiliar tracking area. The paper describes the effort that is underway and reports preliminary results which have been obtained in each of these areas over the last few years.
C1 [Bachmann, Eric R.; Zmuda, Michael] Miami Univ, Dept Comp Sci & Software Engn, Oxford, OH 45056 USA.
[Calusdian, James; Yun, Xiaoping] Naval Postgrad Sch, Dept Elect & Comp Engn, Monterey, CA 93943 USA.
[Hodgson, Eric; Waller, David] Miami Univ, Dept Psychol, Oxford, OH 45056 USA.
RP Bachmann, ER (reprint author), Miami Univ, Dept Comp Sci & Software Engn, Oxford, OH 45056 USA.
EM Eric.Bachmann@muohio.edu; zmudam@muohio.edu; jcalusdi@nps.edu;
yun@nps.edu; Eric.Hodgson@muohio.edu; wallerda@muohio.edu
FU National Science Foundation (NSF); Army Research Office (ARO)
FX This work was supported in part by the National Science Foundation (NSF)
and the Army Research Office (ARO). The authors would like to
acknowledge the work of Jeannette Holm, David Vincent, Joshua Wonser,
and Chuan Hao Yang, and thank them for their exception al efforts in
helping to make this research possible.
NR 11
TC 3
Z9 3
U1 0
U2 1
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
BN 978-1-4673-1119-9
PY 2012
BP 108
EP 115
PG 8
WC Computer Science, Information Systems; Engineering, Electrical &
Electronic
SC Computer Science; Engineering
GA BCL54
UT WOS:000310619400017
ER
PT S
AU Tian, YD
Narasimhan, SG
Vannevel, AJ
AF Tian, Yuandong
Narasimhan, Srinivasa G.
Vannevel, Alan J.
GP IEEE
TI Depth from Optical Turbulence
SO 2012 IEEE CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION (CVPR)
SE IEEE Conference on Computer Vision and Pattern Recognition
LA English
DT Proceedings Paper
CT IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
CY JUN 16-21, 2012
CL Providence, RI
SP IEEE
AB Turbulence near hot surfaces such as desert terrains and roads during the summer, causes shimmering, distortion and blurring in images. While recent works have focused on image restoration, this paper explores what information about the scene can be extracted from the distortion caused by turbulence. Based on the physical model of wave propagation, we first study the relationship between the scene depth and the amount of distortion caused by homogenous turbulence. We then extend this relationship to more practical scenarios such as finite extent and height-varying turbulence, and present simple algorithms to estimate depth ordering, depth discontinuity and relative depth, from a sequence of short exposure images. In the case of general non-homogenous turbulence, we show that a statistical property of turbulence can be used to improve long-range structure-from-motion (or stereo). We demonstrate the accuracy of our methods in both laboratory and outdoor settings and conclude that turbulence (when present) can be a strong and useful depth cue.
C1 [Tian, Yuandong; Narasimhan, Srinivasa G.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
[Vannevel, Alan J.] US Naval, Air Warfare Ctr, China Lake, CA USA.
RP Tian, YD (reprint author), Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
EM yuandong@cs.cmu.edu; srinivas@cs.cmu.edu; alan.vannevel@navy.mil
NR 25
TC 2
Z9 2
U1 1
U2 7
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1063-6919
BN 978-1-4673-1228-8
J9 PROC CVPR IEEE
PY 2012
BP 246
EP 253
PG 8
WC Computer Science, Artificial Intelligence; Computer Science,
Interdisciplinary Applications; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BBZ37
UT WOS:000309166200032
ER
PT J
AU Roesler, JR
Cervantes, VG
Amirkhanian, AN
AF Roesler, Jeffery R.
Cervantes, Victor G.
Amirkhanian, Armen N.
TI Accelerated performance testing of concrete pavement with short slabs
SO INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
LA English
DT Article
DE concrete pavements; short slab geometry; full-scale testing; accelerated
testing
ID ULTRATHIN; MINNESOTA; FRACTURE; PLAIN
AB A new concept for designing concrete pavements by optimising the slab geometry in order to reduce the slab thickness as well as to minimise the mechanical load transfer devices has recently been proposed. Theoretically, the reduced slab size lowers the load and curling-induced tensile stresses and concomitantly a thinner concrete slab can be constructed. Full-scale test sections were constructed and tested under accelerated pavement loading conditions to validate this design concept hypothesis. The design and concrete material factors studied in this research were concrete thickness of 9, 15 or 20 cm; granular or asphalt concrete base layer; and plain or fibre-reinforced concrete (FRC). A methodology was presented to convert the channelised traffic loading to equivalent single axle loads (ESALs) so that comparisons could be made between the various test sections. The accelerated pavement testing showed that shorter slab sizes can sustain a significant number of overloads and greater number of ESALs before developing cracking relative to standard jointed concrete pavements. The most prevalent distress observed was corner cracking which occurred twice as much as longitudinal cracks, whereas only 3 out of 46 cracking distresses were transverse cracks. The 20 cm concrete slabs on granular base did not experience fatigue cracking for trafficking up to 51 million ESALs. The 15 cm concrete slabs on granular base began cracking on an average of 11 million ESALs. As expected, the concrete slabs on asphalt base resisted a significant larger number of ESALs relative to the same concrete thickness on granular base. The cracking performance of the 9 cm concrete slabs on granular base varied with the stiffness of the soil. For the 9 cm slab thickness, structural fibres provided a longer fatigue life and extended service life relative to the plain concrete slabs. Finally, the smaller slab sizes maintained a medium-to-high load transfer efficiency over the accelerated loading period for all slab thicknesses without the development of any faulting. As expected, these slab systems resulted in higher deflections, and, therefore, the granular base and subgrade layers as well as lateral drainage system must be designed and specified to reduce the rate of permanent deformation and minimise the possibility of support erosion.
C1 [Roesler, Jeffery R.; Amirkhanian, Armen N.] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL USA.
[Cervantes, Victor G.] USN, NAVFAC, Facil Engn Serv Ctr, Port Hueneme, CA USA.
RP Amirkhanian, AN (reprint author), Univ Illinois, Dept Civil & Environm Engn, Urbana, IL USA.
EM amirkha1@illinois.edu
OI Amirkhanian, Armen/0000-0002-8436-8958
FU TCPavements Ltd.
FX The authors would like to acknowledge TCPavements Ltd. for their
financial support of this research. TCPavements is patented technology
in Chile (44820-2009), the USA (757,1581) and international application
PCT/EP2006/064732. The contents of this report reflect the view of the
authors, who are responsible for the facts and accuracy of the data
presented herein.
NR 49
TC 16
Z9 17
U1 0
U2 15
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1029-8436
J9 INT J PAVEMENT ENG
JI Int. J. Pavement Eng.
PY 2012
VL 13
IS 6
BP 494
EP 507
DI 10.1080/10298436.2011.575134
PG 14
WC Construction & Building Technology; Engineering, Civil; Materials
Science, Characterization & Testing
SC Construction & Building Technology; Engineering; Materials Science
GA 032RB
UT WOS:000310735600002
ER
PT J
AU Rossi, RA
McDowell, LK
Aha, DW
Neville, J
AF Rossi, Ryan A.
McDowell, Luke K.
Aha, David W.
Neville, Jennifer
TI Transforming Graph Data for Statistical Relational Learning
SO JOURNAL OF ARTIFICIAL INTELLIGENCE RESEARCH
LA English
DT Article
ID MARKOV LOGIC-NETWORKS; P-ASTERISK MODELS; WORLD-WIDE-WEB;
LINK-PREDICTION; SOCIAL NETWORKS; METABOLIC NETWORKS; COLLECTIVE
CLASSIFICATION; RECOMMENDER SYSTEMS; PROBABILISTIC MODEL;
FEATURE-SELECTION
AB Relational data representations have become an increasingly important topic due to the recent proliferation of network datasets (e. g., social, biological, information networks) and a corresponding increase in the application of Statistical Relational Learning (SRL) algorithms to these domains. In this article, we examine and categorize techniques for transforming graph-based relational data to improve SRL algorithms. In particular, appropriate transformations of the nodes, links, and/or features of the data can dramatically affect the capabilities and results of SRL algorithms. We introduce an intuitive taxonomy for data representation transformations in relational domains that incorporates l ink transformation and nod e transformation as symmetric representation tasks. More specifically, the transformation tasks for both nodes and links include (i) predicting their existence, (ii) predicting their label or type, (iii) estimating their weight or importance, and (iv) systematically constructing their relevant features. We motivate our taxonomy through detailed examples and use it to survey competing approaches for each of these tasks. We also discuss general conditions for transforming links, nodes, and features. Finally, we highlight challenges that remain to be addressed.
C1 [Rossi, Ryan A.; Neville, Jennifer] Purdue Univ, Dept Comp Sci, W Lafayette, IN 47907 USA.
[McDowell, Luke K.] USN Acad, Dept Comp Sci, Annapolis, MD 21402 USA.
[Aha, David W.] USN, Res Lab Code 5514, Navy Ctr Appl Res Artificial Intelligence, Washington, DC 20375 USA.
RP Rossi, RA (reprint author), Purdue Univ, Dept Comp Sci, W Lafayette, IN 47907 USA.
EM RROSSI@PURDUE.EDU; LMCDOWEL@USNA.EDU; DAVID.AHA@NRL.NAVY.MIL;
NEVILLE@PURDUE.EDU
OI Rossi, Ryan/0000-0001-9758-0635
FU ASEE/ONR NREIP; NSF Graduate Research Fellowship; NSF [1116439,
IIS-1149789]; ONR
FX We thank all the reviewers for many helpful suggestions and feedback.
The majority of this work was completed at the Naval Research
Laboratory, where Ryan Rossi was supported by an ASEE/ONR NREIP summer
internship in 2010 and by a NSF Graduate Research Fellowship (at Purdue
University). Luke McDowell was supported in part by NSF award number
1116439 and by a grant from ONR. This research was also partly supported
by the NSF under the contract number IIS-1149789. The views and
conclusions contained herein are those of the authors and should not be
interpreted as necessarily representing the official policies or
endorsements, either expressed or implied, of ONR, NSF, or the U.S.
Government.
NR 287
TC 11
Z9 11
U1 0
U2 7
PU AI ACCESS FOUNDATION
PI MARINA DEL REY
PA USC INFORMATION SCIENCES INST, 4676 ADMIRALITY WAY, MARINA DEL REY, CA
90292-6695 USA
SN 1076-9757
EI 1943-5037
J9 J ARTIF INTELL RES
JI J. Artif. Intell. Res.
PY 2012
VL 45
BP 363
EP 441
PG 79
WC Computer Science, Artificial Intelligence
SC Computer Science
GA 033MT
UT WOS:000310801900001
ER
PT J
AU Henderson, WA
Fylstra, P
De Long, HC
Trulove, PC
Parsons, S
AF Henderson, Wesley A.
Fylstra, Paul
De Long, Hugh C.
Trulove, Paul C.
Parsons, Simon
TI Crystal structure of the ionic liquid EtNH3NO3-Insights into the thermal
phase behavior of protic ionic liquids
SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATION; SOLID METHYLAMMONIUM BROMIDE;
ORDER-DISORDER TRANSITION; X-RAY-DIFFRACTION; MAGNETIC-RESONANCE;
ETHYLAMMONIUM NITRATE; INFRARED-SPECTRA; NEUTRON-DIFFRACTION; AMMONIUM
HALIDES; SELF-DIFFUSION
AB The crystal structure of the salt ethylammonium nitrate (EtNH3NO3) has been determined. EtNH3NO3 is one of the most widely studied protic ionic liquids (PILs)-ILs formed by proton transfer from a Bronsted acid to a Bronsted base. The structural features from the crystal structure, in concert with a Raman spectroscopic analysis of the ions, provide direct insight as to why EtNH3NO3 melts below ambient temperature, while other related salts (such as EtNH3Cl) do not.
C1 [Henderson, Wesley A.; Fylstra, Paul; Trulove, Paul C.] USN Acad, Dept Chem, Annapolis, MD 21402 USA.
[Henderson, Wesley A.] N Carolina State Univ, Dept Chem & Biomol Engn, Ion Liquids & Electrolyte Energy Technol ILEET La, Raleigh, NC 27695 USA.
[De Long, Hugh C.] USAF, Off Sci Res, Arlington, VA 22203 USA.
[Parsons, Simon] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland.
RP Henderson, WA (reprint author), USN Acad, Dept Chem, Annapolis, MD 21402 USA.
EM whender@ncsu.edu; hugh.delong@afosr.af.mil; trulove@usna.edu;
s.parsons@ed.ac.uk
FU U.S. Air Force Office of Scientific Research
FX The U.S. Air Force Office of Scientific Research is gratefully
acknowledged for funding portions of this work. Any opinions, findings
and conclusions or recommendations expressed in this material are those
of the authors and do not necessarily reflect the views of the U.S. Air
Force or Navy.
NR 61
TC 12
Z9 12
U1 1
U2 57
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1463-9076
EI 1463-9084
J9 PHYS CHEM CHEM PHYS
JI Phys. Chem. Chem. Phys.
PY 2012
VL 14
IS 46
BP 16041
EP 16046
DI 10.1039/c2cp43079g
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 032SS
UT WOS:000310740000012
PM 23099473
ER
PT S
AU Zhilyaev, AP
McNelley, TR
Ruano, OA
AF Zhilyaev, A. P.
McNelley, T. R.
Ruano, O. A.
BE Palmiere, EJ
Wynne, BP
TI Microstructure and texture evolution in metals and alloys during intense
plastic deformation
SO RECRYSTALLIZATION AND GRAIN GROWTH IV
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 4th International Conference on Recrystallization and Grain Growth (ReX
& GG 2010)
CY JUL 04-09, 2010
CL Sheffield, ENGLAND
DE Microstructure; texture; high-pressure torsion; equal channel angular
pressing
ID HIGH-PRESSURE TORSION; COMMERCIAL PURITY ALUMINUM; NANOSTRUCTURED
MATERIALS; MECHANICAL-PROPERTIES; GRAIN-REFINEMENT; HOMOGENEITY
AB Intense plastic deformation is generally effective in producing grain refinement. IPD methods include equal channel angular pressing/extrusion (ECAP/ECAE), high-pressure torsion (HPT), accumulative roll bonding (ARB), and friction stir processing (FSP), among others. In this work, we summarize the main results on grain refinement by these processing methods and present our own data on microstructure and texture evolution in metals and alloys during ECAP, HPT and FSP. Whereas ECAP and HPT are usually performed with the work piece material initially at room temperature or even at liquid nitrogen temperature to enhance refinement, FSP involves a brief but complex thermomechanical cycle with peak temperatures up to 0.7 - 0.9 T-Melt. Apparently, materials undergo dynamic recrystallization (DRX) during ESP. DRX also occurs also in metals and alloys of low T-Melt due to adiabatic heating during HPT performed at room temperature. The paper is devoted to revisiting of previous as well as new results and a comparative analysis of microstructure and texture evolution in commercially pure aluminum and selected pure metals and alloys during ECAP, HPT and FSP in order to illustrate the limits of grain refinement.
C1 [Zhilyaev, A. P.; Ruano, O. A.] CSIC, Dept Met Phys, Ctr Nacl Invest Met CENIM, Av Gregorio del Amo 8, Madrid 28040, Spain.
[Zhilyaev, A. P.] Russian Acad Sci, Inst Metals Superplastic Problem, Ufa 450001, Russia.
[McNelley, T. R.] US Navy, Postgrad Sch, Dept Mech & Astronaut Engn, Monterey, CA 93943 USA.
RP Zhilyaev, AP (reprint author), CSIC, Dept Met Phys, Ctr Nacl Invest Met CENIM, Av Gregorio del Amo 8, Madrid 28040, Spain.
EM zhilyaev@cenim.csic.es; TMcNelley@nps.edu; ruano@cenim.csic.es
RI Zhilyaev, Alexander/E-5624-2010; Ruano, Oscar/H-1835-2015;
OI Ruano, Oscar/0000-0001-6368-986X; Zhilyaev,
Alexander/0000-0002-1902-8703
FU MICINN of Spain [MAT2009-14452-C02-01]
FX The work was partially support by MICINN (MAT2009-14452-C02-01) of
Spain.
NR 32
TC 0
Z9 0
U1 0
U2 9
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-390-0
J9 MATER SCI FORUM
PY 2012
VL 715-716
BP 51
EP +
DI 10.4028/www.scientific.net/MSF.715-716.51
PG 3
WC Materials Science, Ceramics; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA BCA42
UT WOS:000309430800006
ER
PT S
AU Klein, PB
AF Klein, P. B.
BE Devaty, RP
Dudley, M
Chow, TP
Neudeck, PG
TI Long Carrier Lifetimes in n-type 4H-SiC Epilayers
SO SILICON CARBIDE AND RELATED MATERIALS 2011, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 14th International Conference on Silicon Carbide and Related Materials
(ICSCRM 2011)
CY SEP 11-16, 2011
CL Cleveland, OH
SP Cree, Keithley Instruments, AIXTRON, Dow Corn Elect Solut, Gen Elect, CuttingEdgeIons com, Off Naval Res Global (ONRG), NASA Glenn Res Ctr, Infineon, SemiSouth, Microsemi, OAI
DE 4H-SiC; carrier lifetime; defects; recombination
ID CHEMICAL-VAPOR-DEPOSITION; ENERGY-ELECTRON IRRADIATION; EPITAXIAL
LAYERS; DEEP LEVELS; DEFECTS; GROWTH
AB Recent advances in preparing n-type 4H-SiC with long carrier lifetimes have greatly enhanced the possibility of realizing commercially available, very high voltage and high power solid state switching diodes. For the range > several kV, vertical bipolar structures are required with drift layers exhibiting carrier lifetimes >= several mu sec. Recently, low-doped epilayers with carrier lifetimes in excess of this have been demonstrated, thus approaching a goal that has been pursued for over a decade. Historically, the short lifetimes in early epitaxial layers (a few hundred nsec) were eventually identified with the V-c-related Z(1/2) lifetime killer. Current strategies to minimize this defect are an essential ingredient in the procedure for obtaining long-lifetime material. In order to optimize the attainable lifetimes, it has been shown that in addition to low Z(1/2) levels, very thick layers are required to minimize the effects of recombination in the substrate and surface passivation is also necessary to minimize surface recombination (S < 1000 cm/sec).
C1 USN, Res Lab, Washington, DC 20375 USA.
RP Klein, PB (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM paul.klein@nrl.navy.mil
NR 37
TC 4
Z9 4
U1 0
U2 4
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-419-8
J9 MATER SCI FORUM
PY 2012
VL 717-720
BP 279
EP 284
DI 10.4028/www.scientific.net/MSF.717-720.279
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCA44
UT WOS:000309431000065
ER
PT S
AU Mahadik, NA
Stahlbush, RE
Caldwell, JD
O'Loughlin, M
Burk, A
AF Mahadik, Nadeemullah A.
Stahlbush, Robert E.
Caldwell, Joshua D.
O'Loughlin, Michael
Burk, Albert
BE Devaty, RP
Dudley, M
Chow, TP
Neudeck, PG
TI Correlation of Extended Defects on Carrier Lifetime in Thick SiC
Epilayers
SO SILICON CARBIDE AND RELATED MATERIALS 2011, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 14th International Conference on Silicon Carbide and Related Materials
(ICSCRM 2011)
CY SEP 11-16, 2011
CL Cleveland, OH
SP Cree, Keithley Instruments, AIXTRON, Dow Corn Elect Solut, Gen Elect, CuttingEdgeIons com, Off Naval Res Global, NASA Glenn Res Ctr, Infineon, SemiSouth, Microsemi, OAI
DE Carrier Lifetime; Extended Defects; High power
ID DISLOCATIONS
AB The effect of extended defects on carrier lifetime was investigated in 140 pm thick 4H-SiC epilayers using whole wafer ultraviolet photoluminescence (UVPL) and microwave photoconductive decay (mu PCD) mapping. Half-loop arrays (HLA) seen in the UVPL images showed a corresponding lifetime degradation in the same region, even before expansion of the HLAs to form SFs. Lifetime lowering was also seen for a defect comprising of a small 3C-SiC inclusion with a larger misoriented 4H-SiC region. Additionally, formation of slip planes after high temperature annealing was observed, which consequently shows a lifetime reduction in that region.
C1 [Mahadik, Nadeemullah A.; Stahlbush, Robert E.; Caldwell, Joshua D.] USN, Res Lab, 4555 Overlook Ave, Washington, DC 20375 USA.
[O'Loughlin, Michael; Burk, Albert] Creare Res & Dev Inc, Durham, NC 27703 USA.
RP Mahadik, NA (reprint author), USN, Res Lab, 4555 Overlook Ave, Washington, DC 20375 USA.
EM mahadik@ccs.nrl.navy.mil
RI Caldwell, Joshua/B-3253-2008
OI Caldwell, Joshua/0000-0003-0374-2168
NR 12
TC 2
Z9 2
U1 1
U2 6
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-419-8; 978-3-03813-833-4
J9 MATER SCI FORUM
PY 2012
VL 717-720
BP 297
EP +
DI 10.4028/www.scientific.net/MSF.717-720.297
PG 2
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCA44
UT WOS:000309431000069
ER
PT S
AU Stahlbush, RE
Zhang, Q
Agarwal, A
Mahadik, NA
AF Stahlbush, Robert E.
Zhang, Qingchun (Jon)
Agarwal, Anant
Mahadik, Nadeemullah A.
BE Devaty, RP
Dudley, M
Chow, TP
Neudeck, PG
TI Effect of Stacking Faults Originating from Half Loop Arrays on
Electrical Behavior of 10 kV 4H-SiC PiN Diodes
SO SILICON CARBIDE AND RELATED MATERIALS 2011, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 14th International Conference on Silicon Carbide and Related Materials
(ICSCRM 2011)
CY SEP 11-16, 2011
CL Cleveland, OH
SP Cree, Keithley Instruments, AIXTRON, Dow Corn Elect Solut, Gen Elect, CuttingEdgeIons com, Off Naval Res Global, NASA Glenn Res Ctr, Infineon, SemiSouth, Microsemi, OAI
DE PiN degradation; half-loop array; stacking fault; basal plane
dislocation; BPD
ID DISLOCATIONS; EPITAXY
AB The effects of Shockley stacking faults (SSFs) that originate from half loop arrays (HLAs) on the forward voltage and reverse leakage were measured in 10 kV 4H-SiC PiN diodes. The presence of HLAs and basal plane dislocations in each diode in a wafer was determined by ultraviolet photoluminescence imaging of the wafer before device fabrication. The SSFs were expanded by electrical stressing under forward bias of 30 A/cm(2), and contracted by annealing at 550 degrees C. The electrical stress increased both the forward voltage and reverse leakage. Annealing returned the forward voltage and reverse leakage to nearly their original behavior. The details of SSF expansion and contraction from a HLA and the effects on the electrical behavior of the PiN diodes are discussed.
C1 [Stahlbush, Robert E.; Mahadik, Nadeemullah A.] USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
[Zhang, Qingchun (Jon); Agarwal, Anant] Cree Inc, Res Triangle Pk, NC 27709 USA.
RP Stahlbush, RE (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM stahlbush@nrl.navy.mil
NR 10
TC 5
Z9 5
U1 1
U2 6
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-419-8; 978-3-03813-833-4
J9 MATER SCI FORUM
PY 2012
VL 717-720
BP 387
EP +
DI 10.4028/www.scientific.net/MSF.717-720.387
PG 2
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCA44
UT WOS:000309431000091
ER
PT S
AU Mahadik, NA
Stahlbush, RE
Caldwell, JD
Hobart, KD
AF Mahadik, Nadeemullah A.
Stahlbush, R. E.
Caldwell, J. D.
Hobart, K. D.
BE Devaty, RP
Dudley, M
Chow, TP
Neudeck, PG
TI Ultraviolet Photoluminescence Imaging of Stacking Fault Contraction in
4H-SiC Epitaxial Layers
SO SILICON CARBIDE AND RELATED MATERIALS 2011, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 14th International Conference on Silicon Carbide and Related Materials
(ICSCRM 2011)
CY SEP 11-16, 2011
CL Cleveland, OH
SP Cree, Keithley Instruments, AIXTRON, Dow Corn Elect Solut, Gen Elect, CuttingEdgeIons com, Off Naval Res, NASA Glenn Res Ctr, Infineon, SemiSouth, Microsemi, OAI
DE UVPL Imaging; Stacking fault contraction; Basal Plane Dislocations
ID DIODES; DEFECTS
AB Shockley stacking fault (SSF) contraction in 4H-SiC was investigated, in-situ, under varying temperature and ultraviolet (UV) intensity. Contraction of single SSFs at room temperature was observed for the first time under low power UV excitation of 0.04 W/cm(2). At temperatures above 150 degrees C, complete SSF contraction occurred for UV power at 0.2 W/cm(2). In contrast to expansion, SSF contraction occurred in discrete jumps between pinning sites along existing C-core partials. Luminescence from the pinning sites suggest they may be local concentrations of point defects. Additionally, a change in the line direction of the Si-core partials by similar to 25 degrees off the <11<(2)over bar> 0> direction was observed.
C1 [Mahadik, Nadeemullah A.; Stahlbush, R. E.; Caldwell, J. D.; Hobart, K. D.] USN, Res Lab, Washington, DC 20375 USA.
RP Mahadik, NA (reprint author), USN, Res Lab, 4555 Overlook Ave, Washington, DC 20375 USA.
EM mahadik@ccs.nrl.navy.mil
RI Caldwell, Joshua/B-3253-2008
OI Caldwell, Joshua/0000-0003-0374-2168
NR 16
TC 3
Z9 3
U1 0
U2 4
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-419-8
J9 MATER SCI FORUM
PY 2012
VL 717-720
BP 391
EP 394
DI 10.4028/www.scientific.net/MSF.717-720.391
PG 4
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCA44
UT WOS:000309431000092
ER
PT S
AU Caldwell, JD
Lombez, L
Delamarre, A
Guillemoles, JF
Bourgoin, B
Hull, BA
Verhaegen, M
AF Caldwell, Joshua D.
Lombez, Laurent
Delamarre, Amaury
Guillemoles, Jean-Francois
Bourgoin, Brice
Hull, Brett A.
Verhaegen, Marc
BE Devaty, RP
Dudley, M
Chow, TP
Neudeck, PG
TI ii Luminescence Imaging of Extended Defects in SiC via Hyperspectral
Imaging
SO SILICON CARBIDE AND RELATED MATERIALS 2011, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 14th International Conference on Silicon Carbide and Related Materials
(ICSCRM 2011)
CY SEP 11-16, 2011
CL Cleveland, OH
SP Cree, Keithley Instruments, AIXTRON, Dow Corn Elect Solut, Gen Elect, CuttingEdgeIons com, Off Naval Res Global, NASA Glenn Res Ctr, Infineon, SemiSouth, Microsemi, OAI
DE hyperspectral imaging; photoluminescence; electroluminescence; pin
diode; stacking faults
ID STACKING-FAULTS; INCLUSIONS; DIODES
AB Over the past decade, improvements in silicon carbide growth and materials have led to the development of commercialized unipolar devices such as Schottky diodes and MOSFETs. However, much work remains to realize the goal of wide-scale commercialization of both unipolar and bipolar devices, such as pin diodes or IGBTs, for applications requiring high powers, operating at elevated temperatures or in radiation environments or for many fast switching applications. Despite the great strides that have been made in reducing extended and point defect densities during this period, such defects still remain and, with the push to lower off-cut angle substrates, are in many cases seeing increases in prevalence. Thus, spectroscopic and imaging techniques for locating and identifying these defects are in high demand. Luminescence imaging and spectroscopy have both been utilized heavily in such work, yet simultaneously obtaining corresponding spectroscopic and spatial information from such defects is problematic. Here we report on hyperspectral imaging of electroluminescence from SiC pin diodes, whereby a stack of luminescence images are collected over a wide spectral range (400-900 nm), thereby providing the ability to simultaneously image distinct features and identify their corresponding spectral properties. This process is also equally applicable to collecting either photo- or electroluminescence from other materials or devices emitting in either the UV-Vis or NIR spectral range, as well as to reflectance, transmission or other imaging techniques.
C1 [Caldwell, Joshua D.] USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
[Lombez, Laurent; Delamarre, Amaury; Guillemoles, Jean-Francois] Ecole Natl Super, Chim ParisTech, F-75231 Paris, France.
[Hull, Brett A.] Cree Inc, Res Triangle Pk, NC 27709 USA.
[Bourgoin, Brice; Verhaegen, Marc] Photon Etc, Quebec City H2S 2X3, PQ, Canada.
RP Caldwell, JD (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM joshua.caldwell@nrl.navy.mil; laurent-lombez@chimie-paristech.fr;
amaury-delamarre@chimie-paristech.fr;
jf-guillemoles@chimie-paristech.fr; bbourgoin@photonetc.com;
brett_hull@cree.com; marc.verhaegen@photonetc.com
RI Caldwell, Joshua/B-3253-2008; Guillemoles, JF/I-5166-2013;
OI Caldwell, Joshua/0000-0003-0374-2168; Guillemoles,
Jean-Francois/0000-0003-0114-8624
FU ONR; DARPA
FX This work was supported by ONR and DARPA. The authors thank Dr. Rachael
Myers-Ward, Dr. Robert Stahlbush and Dr. Orest Glembocki for helpful
conversations.
NR 17
TC 1
Z9 1
U1 0
U2 9
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-419-8; 978-3-03813-833-4
J9 MATER SCI FORUM
PY 2012
VL 717-720
BP 403
EP +
DI 10.4028/www.scientific.net/MSF.717-720.403
PG 2
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCA44
UT WOS:000309431000095
ER
PT S
AU Cheiwchanchamnangij, T
Birkel, T
Lambrecht, WRL
Efros, AL
AF Cheiwchanchamnangij, Tawinan
Birkel, Thomas
Lambrecht, Walter R. L.
Efros, Al. L.
BE Devaty, RP
Dudley, M
Chow, TP
Neudeck, PG
TI GaAs Nanowires: A New Place to Explore Polytype Physics
SO SILICON CARBIDE AND RELATED MATERIALS 2011, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 14th International Conference on Silicon Carbide and Related Materials
(ICSCRM 2011)
CY SEP 11-16, 2011
CL Cleveland, OH
SP Cree, Keithley Instruments, AIXTRON, Dow Corn Elect Solut, Gen Elect, CuttingEdgeIons com, Off Naval Res Global, NASA Glenn Res Ctr, Infineon, SemiSouth, Microsemi, OAI
DE polytypism; GW calculations; nanowire; GaAs
AB Recently, polytypism has been observed in nanowires in materials (e.g. GaAs) for which normally only one crystal structure is stable. Here we provide band structure parameters for wurzite and 4H GaAs and use them for modeling the nanowire electronic states. The band gap, crystal field splitting, and its strain dependence are calculated using the quasiparticle self-consistent GW method. The nanowire electronic states are obtained in the envelope function approximation within a simplified cylindrical model. The crystal field splitting of the wurtzite GaAs valence band is found to bc 180 meV while in 4H-GaAs it is 69 mcV, suggesting a downward bowing as a function of hexagonality. The conduction band minimum at F changes symmetry character under strain. We discuss the consequences for nanowires and determine the conditions under which a polarization reversal of photoluminescence can occur from mostly perpendicular to parallel to the wire.
C1 [Cheiwchanchamnangij, Tawinan; Birkel, Thomas; Lambrecht, Walter R. L.] Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA.
[Efros, Al. L.] Naval Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA.
RP Lambrecht, WRL (reprint author), Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA.
EM walter.lambrecht@case.edu
RI Lambrecht, Walter/O-1083-2016;
OI Lambrecht, Walter/0000-0002-5377-0143
NR 12
TC 1
Z9 1
U1 0
U2 8
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-419-8; 978-3-03813-833-4
J9 MATER SCI FORUM
PY 2012
VL 717-720
BP 565
EP +
DI 10.4028/www.scientific.net/MSF.717-720.565
PG 2
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCA44
UT WOS:000309431000135
ER
PT S
AU Anderson, TJ
Hobart, KD
Nyakiti, LO
Wheeler, VD
Myers-Ward, RL
Caldwell, JD
Bezares, FJ
Gaskill, DK
Eddy, CR
Kub, FJ
Jernigan, GG
Tadjer, MJ
Imhoff, EA
AF Anderson, T. J.
Hobart, K. D.
Nyakiti, L. O.
Wheeler, V. D.
Myers-Ward, R. L.
Caldwell, J. D.
Bezares, F. J.
Gaskill, D. K.
Eddy, C. R., Jr.
Kub, F. J.
Jernigan, G. G.
Tadjer, M. J.
Imhoff, E. A.
BE Devaty, RP
Dudley, M
Chow, TP
Neudeck, PG
TI Electrical Characterization of the Graphene-SiC Heterojunction
SO SILICON CARBIDE AND RELATED MATERIALS 2011, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 14th International Conference on Silicon Carbide and Related Materials
(ICSCRM 2011)
CY SEP 11-16, 2011
CL Cleveland, OH
SP Cree, Keithley Instruments, AIXTRON, Dow Corn Elect Solut, Gen Elect, CuttingEdgeIons com, Off Naval Res Global, NASA Glenn Res Ctr, Infineon, SemiSouth, Microsemi, OAI
DE Graphene; p-SiC; n-SiC; heterojunction
AB Graphene, a 2D material, has motivated significant research in the study of its in-plane charge carrier transport in order to understand and exploit its unique physical and electrical properties. The vertical graphene-semiconductor system, however, also presents opportunities for unique devices, yet there have been few attempts to understand the properties of carrier transport through the graphene sheet into an underlying substrate. In this work, we investigate the epitaxial graphene/4H-SiC system, studying both p and n-type SiC substrates with varying doping levels in order to better understand this vertical heterojunction.
C1 [Anderson, T. J.; Hobart, K. D.; Myers-Ward, R. L.; Caldwell, J. D.; Gaskill, D. K.; Eddy, C. R., Jr.; Kub, F. J.; Jernigan, G. G.; Imhoff, E. A.] USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
[Nyakiti, L. O.; Wheeler, V. D.; Bezares, F. J.] American Soc Engn Educ, Washington, DC USA.
[Tadjer, M. J.] Univ Politecn Madrid, E-28040 Madrid, Spain.
RP Anderson, TJ (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM travis.anderson@nrl.navy.mil; karl.hobart@nrl.navy.mil;
luke.nyakiti.ctr@nrl.navy.mil; virginia.wheeler.ctr@nrl.navy.mil;
rachael.myers-ward@nrl.navy.mil; joshua.caldwell@nrl.navy.mil;
francisco.bezares.ctr@nrl.navy.mil; kurt.gaskill@nrl.navy.mil;
chip.eddy@nrl.navy.mil; fritz.kub@nrl.navy.mil;
glenn.jernigan@nrl.navy.mil; mtadjer@die.upm.es;
gene.imhoff@nrl.navy.mil
RI Caldwell, Joshua/B-3253-2008
OI Caldwell, Joshua/0000-0003-0374-2168
NR 14
TC 0
Z9 0
U1 0
U2 7
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-419-8; 978-3-03813-833-4
J9 MATER SCI FORUM
PY 2012
VL 717-720
BP 641
EP +
DI 10.4028/www.scientific.net/MSF.717-720.641
PG 2
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCA44
UT WOS:000309431000153
ER
PT S
AU Walton, SG
Hernandez, SC
Baraket, M
Wheeler, VD
Nyakiti, LO
Myers-Ward, RL
Eddy, CR
Gaskill, DK
AF Walton, S. G.
Hernandez, S. C.
Baraket, M.
Wheeler, V. D.
Nyakiti, L. O.
Myers-Ward, R. L.
Eddy, C. R., Jr.
Gaskill, D. K.
BE Devaty, RP
Dudley, M
Chow, TP
Neudeck, PG
TI Plasma-based chemical modification of epitaxial graphene
SO SILICON CARBIDE AND RELATED MATERIALS 2011, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 14th International Conference on Silicon Carbide and Related Materials
(ICSCRM 2011)
CY SEP 11-16, 2011
CL Cleveland, OH
SP Cree, Keithley Instruments, AIXTRON, Dow Corn Elect Solut, Gen Elect, CuttingEdgeIons com, Off Naval Res Global, NASA Glenn Res Ctr, Infineon, SemiSouth, Microsemi, OAI
DE Epitaxial Graphene; Functionalization; Plasma; Oxygen
ID BEAM-GENERATED PLASMAS; ELECTRON; SPECTROSCOPY; GRAPHITE; CARBON
AB In this work, the chemical modification of epitaxial graphene on SiC using electron beam generated plasmas produced in mixtures of argon and oxygen is demonstrated. The treatment imparts oxygen functional groups on the surface with concentrations ranging up to about 12 at.%, depending on treatment parameters. Surface characterization shows the incorporation of oxygen leads to a disruption of pi-bonds, and an altering of bulk electrical properties.
C1 [Walton, S. G.; Hernandez, S. C.; Baraket, M.] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
[Wheeler, V. D.; Nyakiti, L. O.; Myers-Ward, R. L.; Eddy, C. R., Jr.; Gaskill, D. K.] Naval Res Lab, Elect Sci & Technol Div, Washington, DC 20375 USA.
RP Walton, SG (reprint author), USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
EM scott.walton@nrl.navy.mil; sandra.hangarter.ctr@nrl.navy.mil;
mira.baraket.ctr@nrl.navy.mil; virginia.wheeler.ctr@nrl.navy.mil;
luke.nyakiti.ctr@nrl.navy.mil; rachael.myers-ward@nrl.navy.mil;
chip.eddy@nrl.navy.mil; kurt.gaskill@nrl.navy.mil
RI Hernandez, Sandra/C-6724-2013
FU Naval Research Laboratory base program; National Research Council;
American Society of Engineering Education
FX This work is supported by the Naval Research Laboratory base program. MB
and SCH acknowledge postdoctoral fellowship support from the National
Research Council. VDW and LON acknowledge postdoctoral fellowship
support from the American Society of Engineering Education.
NR 18
TC 7
Z9 7
U1 3
U2 11
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-419-8; 978-3-03813-833-4
J9 MATER SCI FORUM
PY 2012
VL 717-720
BP 657
EP +
DI 10.4028/www.scientific.net/MSF.717-720.657
PG 2
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCA44
UT WOS:000309431000157
ER
PT S
AU Nagareddy, VK
Gaskill, DK
Tedesco, JL
Myers-Ward, RL
Eddy, CR
Goss, JP
Wright, NG
Horsfall, AB
AF Nagareddy, V. K.
Gaskill, D. K.
Tedesco, J. L.
Myers-Ward, R. L.
Eddy, C. R., Jr.
Goss, J. P.
Wright, N. G.
Horsfall, A. B.
BE Devaty, RP
Dudley, M
Chow, TP
Neudeck, PG
TI Temperature Dependent Chemical Sensitivity of Epitaxial Graphene
SO SILICON CARBIDE AND RELATED MATERIALS 2011, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 14th International Conference on Silicon Carbide and Related Materials
(ICSCRM 2011)
CY SEP 11-16, 2011
CL Cleveland, OH
SP Cree, Keithley Instruments, AIXTRON, Dow Corn Elect Solut, Gen Elect, CuttingEdgeIons com, Off Naval Res Global, NASA Glenn Res Ctr, Infineon, SemiSouth, Microsemi, OAI
DE Epitaxial Graphene; Chemical Sensing; Polar Protic; Polar Aprotic;
Dipole Moment
ID SENSORS
AB We investigated the chemical sensing mechanism of epitaxial graphene grown on 6H-SiC (0001) to different polar solvents and their behavior at higher temperatures. We show that at 300 K the sensitivity of the graphene sensor increases with the dipole moment of a solvent and decreases significantly as the temperature increased to 42.5 K. Using electrical measurements, we also show that graphene can effectively discriminate between polar protic and polar aprotic solvents with the shift in device electrical resistance at 300 K.
C1 [Nagareddy, V. K.; Goss, J. P.; Wright, N. G.; Horsfall, A. B.] Newcastle Univ, Sch Elect Elect & Comp Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England.
[Gaskill, D. K.; Tedesco, J. L.; Myers-Ward, R. L.; Eddy, C. R., Jr.] Naval Res Lab, Washington, DC 20375 USA.
RP Nagareddy, VK (reprint author), Newcastle Univ, Sch Elect Elect & Comp Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England.
EM v.k.nagareddy@ncl.ac.uk; kurt.gaskill@nrl.navy.mil;
rachael.myers-ward@nrl.navy.mil; chip.eddy@nrl.navy.mil;
j.p.goss@ncl.ac.uk; n.g.wright@ncl.ac.uk; alton.horsfall@ncl.ac.uk
RI Hernandez, Sandra/C-6724-2013; Wright, Nick/O-1092-2013; Nagareddy,
Karthik/F-3380-2014;
OI Nagareddy, Karthik/0000-0002-8765-3834; Wright,
Nicholas/0000-0003-3169-4159
FU ASEE; U.S. Office of Naval Research and the EPSRC, UK
FX VKN is grateful for studentship support from BAE Systems through the
DHPA scheme. JLT is grateful for postdoctoral support from ASEE.
Portions of this work were supported by the U.S. Office of Naval
Research and the EPSRC, UK
NR 9
TC 0
Z9 0
U1 0
U2 7
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-419-8; 978-3-03813-833-4
J9 MATER SCI FORUM
PY 2012
VL 717-720
BP 691
EP +
DI 10.4028/www.scientific.net/MSF.717-720.691
PG 2
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCA44
UT WOS:000309431000165
ER
PT S
AU Hobart, KD
Imhoff, EA
Kub, FJ
Hefner, AR
Duong, TH
Ortiz-Rodriguez, JM
Ryu, SH
Grider, D
Leslie, S
Sherbondy, J
Ray, B
AF Hobart, K. D.
Imhoff, E. A.
Kub, F. J.
Hefner, A. R., Jr.
Duong, T. H.
Ortiz-Rodriguez, J. M.
Ryu, S. -H.
Grider, D.
Leslie, S.
Sherbondy, J.
Ray, B.
BE Devaty, RP
Dudley, M
Chow, TP
Neudeck, PG
TI Performance of Hybrid 4.5 kV SiC JBS Freewheeling Diode and Si IGBT
SO SILICON CARBIDE AND RELATED MATERIALS 2011, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 14th International Conference on Silicon Carbide and Related Materials
(ICSCRM 2011)
CY SEP 11-16, 2011
CL Cleveland, OH
SP Cree, Keithley Instruments, AIXTRON, Dow Corn Elect Solut, Gen Elect, CuttingEdgeIons com, Off Naval Res Global, NASA Glenn Res Ctr, Infineon, SemiSouth, Microsemi, OAI
DE JBS diode; Schottky diode; IGBT; freewheeling diode
AB The performance of Junction Barrier Schottky (JBS) diodes developed for medium voltage hard-switched Naval power conversion is reported. Nominally 60 A, 4.5kV rated JBS freewheeling diodes were paired with similarly rated Si IGBTs and evaluated for temperature dependent static and dynamic characteristics as well as HTRB and surge capability. The SiC JBS/Si IGBT pair was also directly compared to Si PiN diode/Si IGBT with similar ratings. Compared to Si, the SiC freewheeling diode produced over twenty times lower reverse recovery charge leading to approximately a factor-of-four-reduction in turn-on loss. Alternatively, for equivalent total switching loss, the SiC JBS/Si IGBT hybrid configuration allows for at least a 50% increase in specific switched power density. Reliability testing showed the devices to be robust with zero failures.
C1 [Hobart, K. D.; Imhoff, E. A.; Kub, F. J.] USN, Res Lab, Washington, DC 20375 USA.
[Hefner, A. R., Jr.; Duong, T. H.; Ortiz-Rodriguez, J. M.] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
[Ryu, S. -H.; Grider, D.] Cree Inc, Durham, NC 27703 USA.
[Leslie, S.; Sherbondy, J.] Powerex Inc, Youngwood, PA 15697 USA.
[Ray, B.] Bloomsburg Univ Penn, Bloomsburg, PA 17815 USA.
RP Hobart, KD (reprint author), USN, Res Lab, Washington, DC 20375 USA.
EM karl.hobart@nrl.navy.mil
NR 4
TC 0
Z9 0
U1 0
U2 8
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-419-8; 978-3-03813-833-4
J9 MATER SCI FORUM
PY 2012
VL 717-720
BP 941
EP +
DI 10.4028/www.scientific.net/MSF.717-720.941
PG 2
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCA44
UT WOS:000309431000224
ER
PT S
AU Imhoff, EA
Hobart, KD
Kub, FJ
Ancona, MG
Myers-Ward, RL
Garces, NY
Wheeler, VD
Nyakiti, LO
Eddy, CR
Gaskill, DK
AF Imhoff, E. A.
Hobart, K. D.
Kub, F. J.
Ancona, M. G.
Myers-Ward, R. L.
Garces, N. Y.
Wheeler, V. D.
Nyakiti, L. O.
Eddy, C. R., Jr.
Gaskill, D. K.
BE Devaty, RP
Dudley, M
Chow, TP
Neudeck, PG
TI Positive Temperature Coefficient SiC PiN Diodes
SO SILICON CARBIDE AND RELATED MATERIALS 2011, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 14th International Conference on Silicon Carbide and Related Materials
(ICSCRM 2011)
CY SEP 11-16, 2011
CL Cleveland, OH
SP Cree, Keithley Instruments, AIXTRON, Dow Corn Elect Solut, Gen Elect, CuttingEdgeIons com, Off Naval Res, NASA Glenn Res Ctr, Infineon, SemiSouth, Microsemi, OAI
DE PiN diode; rectifier; temperature-dependence
ID SILICON-CARBIDE; VOLTAGE
AB Integration of patterned ballast resistance into the anode of SiC PiNs is a solution to the dilemma of negative dV(f)/dT for such diodes. In fabricated 4H-SiC PiN diodes, We demonstrate a cross-over from negative to positive temperature coefficient for current densities as low as 80 A/cm(2). Adjusting the percentage of the patterned anode area, the positive or neutral dV(f)/dT can be achieved over a wide current-density range without substantial penalty in the forward voltage drop. This characteristic is crucial for high-power SiC packages with ganged-parallel rectifier arrays.
C1 [Imhoff, E. A.; Hobart, K. D.; Kub, F. J.; Ancona, M. G.; Myers-Ward, R. L.; Garces, N. Y.; Wheeler, V. D.; Nyakiti, L. O.; Eddy, C. R., Jr.; Gaskill, D. K.] USN, Res Lab, Washington, DC 20375 USA.
RP Imhoff, EA (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM imhoff@nrl.navy.mil; hobart@nrl.navy.mil
NR 4
TC 3
Z9 3
U1 1
U2 6
PU TRANS TECH PUBLICATIONS LTD
PI STAFA-ZURICH
PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-419-8
J9 MATER SCI FORUM
PY 2012
VL 717-720
BP 981
EP 984
DI 10.4028/www.scientific.net/MSF.717-720.981
PG 4
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCA44
UT WOS:000309431000234
ER
PT S
AU Veliadis, V
Hearne, H
Chang, W
Caldwell, JD
Stewart, EJ
Snook, M
Howell, RS
Urciuoli, D
Lelis, A
Scozzie, C
AF Veliadis, V.
Hearne, H.
Chang, W.
Caldwell, J. D.
Stewart, E. J.
Snook, M.
Howell, R. S.
Urciuoli, D.
Lelis, A.
Scozzie, C.
BE Devaty, RP
Dudley, M
Chow, TP
Neudeck, PG
TI Recovery of Bipolar-Current Induced Degradations in High-Voltage
Implanted-Gate Junction Field Effect Transistors
SO SILICON CARBIDE AND RELATED MATERIALS 2011, PTS 1 AND 2
SE Materials Science Forum
LA English
DT Proceedings Paper
CT 14th International Conference on Silicon Carbide and Related Materials
(ICSCRM 2011)
CY SEP 11-16, 2011
CL Cleveland, OH
SP Cree, Keithley Instruments, AIXTRON, Dow Corn Elect Solut, Gen Elect, CuttingEdgeIons com, Off Naval Res Global, NASA Glenn Res Ctr, Infineon, SemiSouth, Microsemi, OAI
DE JFET; stacking faults; bipolar degradation; silicon carbide; stressing;
annealing; stacking fault shrinking
ID STACKING-FAULTS; DIODES
AB Electron-hole recombination-induced stacking faults have been shown to degrade the electrical characteristics of SiC power pin and MPS diodes and DMOSFETs with thick drift epitaxial layers. In this paper, we investigate the effects of bipolar injection induced stacking faults on the electrical characteristics of p+ ion-implanted high-voltage vertical-channel JFETs with 100-mu m drift epilayers. The JFETs were stressed at a fixed gate-drain bipolar current density of 100 A/cm(2) for five hours, which led to degradation of the forward gate-drain p-n junction and on-state conduction. The degradation was fully reversed by annealing at 350 degrees C for 96 hours. Forward and reverse gate-source, transfer, reverse gate-drain, and blocking voltage JFET characteristics exhibit no degradation with bipolar stress. Non-degraded characteristics remain unaffected by annealing events. Consequently, should minority carrier injection occur in JFETs operating at elevated temperatures no stacking fault induced degradations are expected. This eliminates the need for specialty substrates with suppressed densities of basal plane dislocations in the fabrication of high-voltage SiC JFETs for high temperature applications.
C1 [Veliadis, V.; Hearne, H.; Stewart, E. J.; Snook, M.; Howell, R. S.] Northrop Grumman Elect Syst, 1212 Winterson Rd, Linthicum, MD 21090 USA.
[Chang, W.] Univ Rochester, Dept Phys, Rochester, NY 14627 USA.
[Caldwell, J. D.] US Naval Res Lab, Washington, DC 20375 USA.
[Urciuoli, D.; Lelis, A.; Scozzie, C.] US Army Res Lab, Adelphi, MD 20783 USA.
RP Veliadis, V (reprint author), Northrop Grumman Elect Syst, 1212 Winterson Rd, Linthicum, MD 21090 USA.
EM victor.veliadis@ngc.com; joshua.caldwell@nrl.navy.mil;
damian.p.urciuoli.civ@mail.mil
RI Caldwell, Joshua/B-3253-2008
OI Caldwell, Joshua/0000-0003-0374-2168
FU Army Research Laboratory and was accomplished under Cooperative
Agreement [W911NF-06-2-0002]
FX Research was sponsored by the Army Research Laboratory and was
accomplished under Cooperative Agreement Number W911NF-06-2-0002. The
views and conclusions contained in this document are those of the
authors and should not be interpreted as representing the official
policies, either expressed or implied, of the Army Research Laboratory
or the U.S. Government. The U.S. Government is authorized to reproduce
and distribute reprints for Government purposes notwithstanding any
copyright notation hereon.
NR 9
TC 0
Z9 0
U1 0
U2 2
PU TRANS TECH PUBLICATIONS LTD
PI DURNTEN-ZURICH
PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND
SN 0255-5476
BN 978-3-03785-419-8; 978-3-03813-833-4
J9 MATER SCI FORUM
PY 2012
VL 717-720
BP 1013
EP +
DI 10.4028/www.scientific.net/MSF.717-720.1013
PG 2
WC Materials Science, Multidisciplinary
SC Materials Science
GA BCA44
UT WOS:000309431000242
ER
PT J
AU Speck, S
Derschum, H
Damdindorj, T
Dashdavaa, O
Jiang, J
Kaysser, P
Jigjav, B
Nyamdorj, E
Baatar, U
Munkhbat, E
Choijilsuren, O
Gerelchuluun, O
Romer, A
Richards, AL
Kiefer, D
Scholz, H
Wolfel, R
Zoller, L
Dobler, G
Essbauer, S
AF Speck, Stephanie
Derschum, Henri
Damdindorj, Tserennorov
Dashdavaa, Otgonbaatar
Jiang, Ju
Kaysser, Philipp
Jigjav, Battsetseg
Nyamdorj, Erdenebat
Baatar, Undraa
Munkhbat, Enkhtuya
Choijilsuren, Otgonchimeg
Gerelchuluun, Otgonsuren
Roemer, Angelika
Richards, Allen L.
Kiefer, Daniel
Scholz, Holger
Woelfel, Roman
Zoeller, Lothar
Dobler, Gerhard
Essbauer, Sandra
TI Rickettsia raoultii, the predominant Rickettsia found in Mongolian
Dermacentor nuttalli
SO TICKS AND TICK-BORNE DISEASES
LA English
DT Article
DE Rickettsia raoultii; Rickettsia sibirica; Ixodes persulcatus;
Dermacentor nuttalli; Mongolia
ID TICK-BORNE RICKETTSIOSES; FEVER GROUP RICKETTSIAE; GERMANY; SLOVACA;
MEMBERS; RUSSIA
AB Since the year 2005, clinical patterns resembling tick-borne rickettsioses have been noticed in Mongolia. Epidemiological data regarding species of the aetiological agent, tick vector, prevalence, and distribution as well as incidence of human cases throughout Mongolia are still sparse to date. In order to identify Rickettsia species occurring in Mongolia, we investigated Dermacentor nuttalli (n = 179) and Ixodes persulcatus (n = 374) collected in 4 selected provinces. Rickettsia raoultii was the predominant Rickettsia (82% prevalence) found in D. nuttalli and was also detected in I. persulcatus (0.8%). The Rickettsia prevalence in D. nuttalli from different provinces varied between 70% and 97%. In addition, R. sibirica was identified in approximately 4% of D. nuttalli, but solely from Arkhanghai province. The results of this study extend the common knowledge about the geographic distribution of R. raoultii and its high prevalence in D. nuttalli. Although the pathogenicity of this Rickettsia is still unclear, it should be considered in Mongolian patients suspected of having tick-borne rickettsiosis. (c) 2012 Elsevier GmbH. All rights reserved.
C1 [Speck, Stephanie] Bundeswehr Inst Microbiol, Dept Virol & Rickettsiol, D-80937 Munich, Germany.
[Damdindorj, Tserennorov; Dashdavaa, Otgonbaatar; Jigjav, Battsetseg; Baatar, Undraa; Munkhbat, Enkhtuya] NCIDNF, Ulaanbaatar, Mongol Peo Rep.
[Jiang, Ju; Richards, Allen L.] USN, Viral & Rickettsial Dis Dept, Med Res Ctr, Silver Spring, MD USA.
[Nyamdorj, Erdenebat; Choijilsuren, Otgonchimeg; Gerelchuluun, Otgonsuren] Local Branch Selenge Aimak, NCIDNF, Sukhbaatar, Mongol Peo Rep.
[Roemer, Angelika] Univ Munich, Munich, Germany.
RP Speck, S (reprint author), Bundeswehr Inst Microbiol, Dept Virol & Rickettsiol, Neuherbergstr 11, D-80937 Munich, Germany.
EM stephaniespeck@bundeswehr.org
RI Valle, Ruben/A-7512-2013
NR 21
TC 13
Z9 14
U1 0
U2 1
PU ELSEVIER GMBH, URBAN & FISCHER VERLAG
PI JENA
PA OFFICE JENA, P O BOX 100537, 07705 JENA, GERMANY
SN 1877-959X
J9 TICKS TICK-BORNE DIS
JI Ticks Tick-Borne Dis.
PY 2012
VL 3
IS 4
BP 227
EP 231
DI 10.1016/j.ttbdis.2012.04.001
PG 5
WC Infectious Diseases; Microbiology; Parasitology
SC Infectious Diseases; Microbiology; Parasitology
GA 028DI
UT WOS:000310402600005
PM 22784401
ER
PT S
AU Donohue, C
Shadforth, S
AF Donohue, Cam
Shadforth, Scott
GP IEEE
TI Evaluation and Lessons Learned Through the Developmental Test of the
AH-1W Helicopter Helmet Display and Tracker System
SO 2012 IEEE AEROSPACE CONFERENCE
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Aerospace Conference
CY MAR 03-10, 2012
CL Big Sky, MT
SP IEEE, AIAA, Phmsoc, AESS
AB Developmental testing (DT) of the Helmet Display and Tracker System (HDTS) as installed on the United States Marine Corps (USMC) AH-1W attack helicopter was conducted to evaluate its performance and effectiveness for the attack helicopter mission. Developmental testing of the HDTS helmet mounted display system (HMDS) as a replacement for the legacy Helmet Sight Subsystem (HSS) and Gideon Aviators Night Vision Imaging System Head-Up Display (ANVIS HUD) was conducted November 2010- July 2011 in the Naval Air Station (NAS) Patuxent River, Maryland local area. HDTS system accuracy, 20mm gun weapon delivery accuracy (WDA), weapons compatibility with Hellfire and 2.75 inch rockets, and human factors were evaluated under mission representative profiles. HDTS demonstrated a number of improvements and increases in capability over the legacy HSS: the capability to boresight the system in the aircraft provided significantly increased convenience over the legacy system; the elimination of the obsolete rail linkage system improved head mobility and increased aircrew safety; the accurate pilot line-of-sight improved 20-mm gun weapon delivery accuracy; and the HDTS symbol set offered significantly increased "heads-up" capability to greatly improve situational awareness in the battlefield.
The HDTS demonstrated satisfactory performance for the USMC Attack helicopter mission; however completion of its developmental test series included overcoming numerous aircraft integration, hardware integration, human factors, and system performance issues. The process of addressing these issues and making warranted system re-designs, molded the HDTS into a highly suitable and desirable system for the AH-1W. This paper will address the HDTS developmental test and evaluation methodology including innovative test techniques using an unmanned aerial system (UAS) for range scoring, discuss improvements afforded as well as issues that generally plague HMDS experienced with HDTS, and highlight lessons learned during the system's growth through developmental testing.
C1 [Donohue, Cam; Shadforth, Scott] USN, Air Stn Patuxent River, Patuxent River, MD 20670 USA.
RP Donohue, C (reprint author), USN, Air Stn Patuxent River, AIR 5-1-2-2 RW Mission Syst Bldg 111,Suite 3A,227, Patuxent River, MD 20670 USA.
EM Cam.donohue@navy.mil; Scott.shadforth@navy.mil
NR 0
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4577-0557-1
J9 AEROSP CONF PROC
PY 2012
PG 11
WC Engineering, Aerospace
SC Engineering
GA BBZ12
UT WOS:000309105303040
ER
PT S
AU Ganguli, G
Crabtree, C
Rudakov, L
Chappie, S
AF Ganguli, Gurudas
Crabtree, Christopher
Rudakov, Leonid
Chappie, Scott
GP IEEE
TI Active Debris Removal by Micron-Scale Dust Injection
SO 2012 IEEE AEROSPACE CONFERENCE
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Aerospace Conference
CY MAR 03-10, 2012
CL Big Sky, MT
SP IEEE, AIAA, Phmsoc, AESS
AB In response to the recent National Research Council report concerning orbital debris hazards and the National Aeronautics and Space Administration study suggesting active removal of small-scale (1mm - cm) 'mission-ending' orbital debris, we discuss concepts for small debris elimination through deployment of micron scale dust. Dust, which naturally fills the near-earth environment, can be deployed artificially in a narrow altitude band to enhance drag on debris and force reentry. The injected dust will also reenter the earth's atmosphere. Orbital and suborbital dust deployment concepts for actively removing debris that (i) has uniformly spread around the earth or (ii) remains localized over a small volume, as well as the system risks and their possible mitigation are discussed.
C1 [Ganguli, Gurudas; Crabtree, Christopher] USN, Res Lab, Div Plasma Phys, Washington, DC 20375 USA.
RP Ganguli, G (reprint author), USN, Res Lab, Div Plasma Phys, Code 6756, Washington, DC 20375 USA.
EM gurudas.ganguli@nrl.navy.mil; chris.crabtree@nrl.navy.mil;
lrudakov@gmail.com; scott.chappie@nrl.navy.mil
NR 19
TC 0
Z9 0
U1 0
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4577-0557-1
J9 AEROSP CONF PROC
PY 2012
PG 9
WC Engineering, Aerospace
SC Engineering
GA BBZ12
UT WOS:000309105300081
ER
PT S
AU Henshaw, CG
AF Henshaw, Carl Glen
GP IEEE
TI Touch Sensing for Space Robotics
SO 2012 IEEE AEROSPACE CONFERENCE
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Aerospace Conference
CY MAR 03-10, 2012
CL Big Sky, MT
SP IEEE, AIAA, Phmsoc, AESS
AB We describe the design of a spaceflight-traceable tactile skin suitable for use with robotic manipulators and the algorithms necessary to make use of it. In order to perform robustly in the presence of orbital thermal and radiation extremes, the skin is based on relatively large discrete force sensors arranged sparsely on a rigid substrate. In order to compensate for the resulting lack of spatial resolution, we have developed a signal reconstruction algorithm based on Basis Pursuit Denoising (BPDN), a sparse reconstruction technique which is shown to provide an effective resolution approximately twenty-five times greater than the Nyquist-Shannon Sampling Theorem suggests is possible for a skin of this type. The signal processing algorithm is robust to white noise and simultaneously performs environmental contact classification.
C1 USN, Res Lab, Naval Ctr Space Technol, Washington, DC 20375 USA.
RP Henshaw, CG (reprint author), USN, Res Lab, Naval Ctr Space Technol, Washington, DC 20375 USA.
EM glen.henshaw@nrl.navy.mil
NR 27
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4577-0557-1
J9 AEROSP CONF PROC
PY 2012
PG 13
WC Engineering, Aerospace
SC Engineering
GA BBZ12
UT WOS:000309105300051
ER
PT S
AU Jaffe, P
Hodkin, J
Harrington, F
AF Jaffe, Paul
Hodkin, Jason
Harrington, Forest
GP IEEE
TI Development of a Sandwich Module Prototype for Space Solar Power
SO 2012 IEEE AEROSPACE CONFERENCE
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Aerospace Conference
CY MAR 03-10, 2012
CL Big Sky, MT
SP IEEE, AIAA, Phmsoc, AESS
AB Space Solar Power (SSP) is broadly defined to be the collection of solar energy in space and its wireless transmission for use on earth. It has been observed that the implementation of such a system could offer energy security, environmental, and technological advantages to those who would undertake its development. Among recent implementations commonly proposed for SSP, the Modular Symmetrical Concentrator (MSC) concept has received considerable attention. It employs an array of modules for performing conversion of concentrated sunlight into microwaves for transmission to earth. While prototypes of such modules have been designed and developed previously by several groups, none have been subjected to the challenging conditions inherent to the space environment and possible solar concentration levels in which an array of modules would be required to operate. The research described herein details our team's efforts to resolve trade studies associated with the development of a "sandwich" module and its planned implementation and testing under realistic operating conditions.
C1 [Jaffe, Paul; Hodkin, Jason; Harrington, Forest] USN, Res Lab, Washington, DC 20375 USA.
RP Jaffe, P (reprint author), USN, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM Paul.jaffe@nrl.navy.mil; Jason.Hodkin@nrl.navy.mil;
Forest.Harrington@nrl.navy.mil
NR 9
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4577-0557-1
J9 AEROSP CONF PROC
PY 2012
PG 9
WC Engineering, Aerospace
SC Engineering
GA BBZ12
UT WOS:000309105301003
ER
PT S
AU Jungwirth, MEL
Wilcox, CC
Romeo, RC
Wick, DV
Dereniak, EL
Martin, RN
Baker, MS
AF Jungwirth, Matthew E. L.
Wilcox, Christopher C.
Romeo, Robert C.
Wick, David V.
Dereniak, Eustace L.
Martin, Robert N.
Baker, Michael S.
GP IEEE
TI Actuation for Carbon Fiber Reinforced Polymer Active Optical Mirrors
SO 2012 IEEE AEROSPACE CONFERENCE
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Aerospace Conference
CY MAR 03-10, 2012
CL Big Sky, MT
SP IEEE, AIAA, Phmsoc, AESS
AB Adaptive or active elements can alter their shape to remove aberrations or shift focal points. Carbon fiber reinforced polymer (CFRP) material improves upon current active mirror materials, such as Zerodur, in several ways: low stiffness-to-weight ratio, very low hysteresis, and greater dynamic range of correction. In this paper, we present recent developments in CFRP mirror actuation, i.e., changing the mirror's shape in an accurate and repeatable fashion. Actuation methods are studied both theoretically, using finite element analysis, and experimentally, using interferometric testing. We present results using two annular rings to push against the mirror's back, producing a wavefront with less than 20 waves of total error. Applications for this work include active telescope secondaries, phase diversity, and adaptive zoom systems.
C1 [Jungwirth, Matthew E. L.] Sandia Natl Labs, 1515 Eubank Blvd SE, Albuquerque, NM 87123 USA.
[Wilcox, Christopher C.] US Naval Res Lab, Washington, DC 20375 USA.
[Romeo, Robert C.] Composite Mirror Appl, Tucson, AZ USA.
[Dereniak, Eustace L.] Univ Arizona, Tucson, AZ 85721 USA.
RP Jungwirth, MEL (reprint author), Sandia Natl Labs, 1515 Eubank Blvd SE, Albuquerque, NM 87123 USA.
EM mejungw@sandia.gov; Chris.wilcox@gmail.com;
robertromeo@compositemirrors.com; dvwick@sandia.gov;
eustace@optics.arizona.edu; robertmartin@compositemirrors.com;
msbaker@sandia.gov
FU Office of Naval Research; Sandia Labs; United States Department of
Energy [DE-AC04-94AL85000]
FX The authors would like to thank the invaluable assistance of Brian Clark
and Jared Milinazzo, and useful discussions with Freddie Santiago and
Brett Bagwell. M. Jungwirth would like to thank E. Jungwirth for helpful
comments on the manuscript.; This work was supported in part by the
Office of Naval Research (Michael Duncan program manager) and the Sandia
Labs LDRD program.; Sandia is a multiprogram laboratory operated by
Sandia Corporation, a Lockheed Martin Company, for the United States
Department of Energy under Contract DE-AC04-94AL85000.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4577-0557-1
J9 AEROSP CONF PROC
PY 2012
PG 9
WC Engineering, Aerospace
SC Engineering
GA BBZ12
UT WOS:000309105301088
ER
PT S
AU Qiu, D
Lynch, R
Blasch, E
Yang, C
AF Qiu, Di
Lynch, Robert
Blasch, Erik
Yang, Chun
GP IEEE
TI Underwater Navigation Using Location-Dependent Signatures
SO 2012 IEEE AEROSPACE CONFERENCE
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Aerospace Conference
CY MAR 03-10, 2012
CL Big Sky, MT
SP IEEE, AIAA, Phmsoc, AESS
DE underwater navigation; multisensor; location signature; geotag; control;
MUSNav
ID SIGNALS
AB This paper investigates the benefits of a multisensor fusion methodology for underwater navigation using location-dependent signatures, or geotags. The proposed coordinate-free system uses both natural and man-made signals, as well as transient events to extract location-dependent signatures for navigation and guidance. Natural signals include the geomagnetic field, gravity field, bathymetric features, and naturally-occurring very low frequency radio signals. Man-made acoustic sources of opportunity include drainage outlets and pump stations in littoral zones and particularly in harbors, which can be explored to serve as underwater beacons for navigation. This paper models a multisensor coordinate-free system, characterizes various signals for underwater navigation, and evaluates the Multisensor Underwater Signature-based Navigation (MUSNav) system in terms of accuracy, availability, and continuity of the navigation solution.
C1 [Qiu, Di; Yang, Chun] Sigtem Technol Inc, San Mateo, CA 94402 USA.
[Lynch, Robert] Naval Undersea Warfare Ctr, Newport, RI USA.
[Blasch, Erik] US Air Force, Res Lab, Wright Patterson AFB, OH USA.
RP Qiu, D (reprint author), Sigtem Technol Inc, San Mateo, CA 94402 USA.
EM diqiu@sigtem.com; robert.s.lynch@navy.mil; erik.blasch@wpafb.af.mil;
chunyang@sigtem.com
NR 19
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4577-0557-1
J9 AEROSP CONF PROC
PY 2012
PG 9
WC Engineering, Aerospace
SC Engineering
GA BBZ12
UT WOS:000309105302015
ER
PT S
AU Strand, TE
Ennis, MJ
AF Strand, Trevor E.
Ennis, Maj John
GP IEEE
TI MV-22B High Density Altitude Handling Qualities
SO 2012 IEEE AEROSPACE CONFERENCE
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Aerospace Conference
CY MAR 03-10, 2012
CL Big Sky, MT
SP IEEE, AIAA, Phmsoc, AESS
AB All rotary wing aircraft suffer from degraded handling qualities while operating at high density altitudes (DA). (1 2 3) It was predicted that the V-22 Osprey would also suffer degraded flying qualities at high DA; however no testing in the low airspeed regime had been conducted above 6000 ft DA, and predictions and simulation were unreliable at high rotor thrust coefficients.
To expand the aircraft operating envelope, and evaluate the unique handling qualities of a tilt rotor, a test program was conducted to evaluate aircraft operational effectiveness specifically in the low airspeed regime (below 50 knots). Flight control frequency response and bandwidth were evaluated in all axes. Paced critical azimuth was conducted to evaluate trim conditions and control margins. Multi-axis inputs were evaluated to determine attitude response. Mission Task Elements (MTE's) were evaluated to characterize operational effectiveness, and validated current tilt rotor techniques and procedures.
This paper presents the test method, scope, and planning efforts, presents results and conclusions, and also identifies recommendations and lessons learned from the evaluation.
C1 [Strand, Trevor E.] Naval Air Syst Command, ISEET Detachment, Hangar 109,RM 255,22347 Cedar Point Rd,Unit 6, Patuxent River, MD 20670 USA.
[Ennis, Maj John] USMC, Dept Navy, AITEVRON 21 HX-21, Patuxent River, MD 20670 USA.
RP Strand, TE (reprint author), Naval Air Syst Command, ISEET Detachment, Hangar 109,RM 255,22347 Cedar Point Rd,Unit 6, Patuxent River, MD 20670 USA.
EM trevor.strand@navy.mil; john.ennis@navy.mil
NR 0
TC 0
Z9 0
U1 1
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4577-0557-1
J9 AEROSP CONF PROC
PY 2012
PG 7
WC Engineering, Aerospace
SC Engineering
GA BBZ12
UT WOS:000309105303030
ER
PT S
AU Warner, JG
Middour, JW
AF Warner, John G.
Middour, Jay W.
GP IEEE
TI Radar Transmitter Geolocation via Novel Observation Technique and
Particle Swarm Optimization
SO 2012 IEEE AEROSPACE CONFERENCE
SE IEEE Aerospace Conference Proceedings
LA English
DT Proceedings Paper
CT IEEE Aerospace Conference
CY MAR 03-10, 2012
CL Big Sky, MT
SP IEEE, AIAA, Phmsoc, AESS
ID PASSIVE LOCALIZATION; CONFIDENCE-REGIONS
AB The ability to precisely determine the location of radar transmitters can be crucially important in maintaining domain awareness. This, however, may be problematic with traditional methods when used with a distributed network of disparate sensors. A novel geolocation technique for circularly scanning radar transmitters is introduced. This technique uses the differenced central times of arrival (DCTOA) of the main beam as an observable. The solution for the transmitters position and scan rate are given using a weighted least squares approach as well as a particle swarm optimizer. Experimental results show this technique is able to locate a radar transmitter within 11 meters, while maintaining minimal complexity. This technique has the advantage of requiring orders of magnitude less timing synchronization among receivers, an order of magnitude less data transfer, and it does not require simultaneous illumination of receivers.
C1 [Warner, John G.; Middour, Jay W.] USN, Res Lab, Washington, DC 20375 USA.
RP Warner, JG (reprint author), USN, Res Lab, Washington, DC 20375 USA.
NR 23
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1095-323X
BN 978-1-4577-0557-1
J9 AEROSP CONF PROC
PY 2012
PG 9
WC Engineering, Aerospace
SC Engineering
GA BBZ12
UT WOS:000309105302009
ER
PT S
AU Kunapareddy, N
Grun, J
Lunsford, R
Gillis, D
Nikitin, S
Wang, Z
AF Kunapareddy, Nagapratima
Grun, Jacob
Lunsford, Robert
Gillis, David
Nikitin, Sergei
Wang, Zheng
BE Fountain, AW
TI Multi-wavelength resonance Raman spectroscopy of bacteria to study the
effects of growth condition
SO CHEMICAL, BIOLOGICAL, RADIOLOGICAL, NUCLEAR, AND EXPLOSIVES (CBRNE)
SENSING XIII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Chemical, Biological, Radiological, Nuclear, and
Explosives (CBRNE) Sensing XIII
CY APR 24-27, 2012
CL Baltimore, MD
SP SPIE
DE Multi-wavelength spectroscopy; Resonance Raman spectroscopy; bacteria
identification; UV
ID DEEP UV; SPECTRA; IDENTIFICATION; NM; EXCITATION; COLI
AB We will examine the use of multi-wavelength UV resonance-Raman signatures to identify the effects of growth phase on different types of bacteria. Gram positive and gram-negative species, Escherichia coli, Bacillus cereus, Citrobacter koseri and Citrobacter braakii were grown to logarithmic and stationary phases in different culture media. Raman spectra of bacteria were obtained by sequential illumination of samples between 220 and 260 nm; a range which encompasses the resonance frequencies of cellular components. In addition to the information contained in the single spectrum, this two-dimensional signature contains information reflecting variations in resonance cross sections with illumination wavelength. Results of our algorithms in identifying the differences between these germs are discussed. Preliminary results indicate that growth affects the Raman signature, but not to an extent that would negate identification of the species.
C1 [Kunapareddy, Nagapratima; Nikitin, Sergei] Res Support Instruments, Lanham, MD USA.
[Lunsford, Robert; Gillis, David] US Naval Res Lab, Remote Sensing Div, Washington, DC USA.
[Gillis, David] US Naval Res Lab, Remote Sensing Div, Washington, DC USA.
[Wang, Zheng] US Naval Res Lab, Ctr Biomol Sci & Engn, Washington, DC USA.
RP Kunapareddy, N (reprint author), Res Support Instruments, Lanham, MD USA.
EM pratima@ccs.nrl.navy.mil
FU Defense Threat Reduction Agency (DTRA)
FX This work was funded and supported by the Defense Threat Reduction
Agency (DTRA). DTRA was founded in 1998 to integrate and focus the
capabilities of the Department of Defense that address the weapons of
Mass Destruction (WMD) threat. The mission of the DTRA is to safeguard
America and its allies from WMD threat (e.g. chemical, biological,
radiological, nuclear and high yield explosives) by providing
capabilities to reduce, eliminate and counter the threat and mitigate
its effects. Under DTRA, Department of Defense resources, expertise and
capabilities are combined to ensure the United States remains ready and
able to address the present and future WMD threats. For more information
on DTRA, visit www.dtra.mil/.
NR 16
TC 1
Z9 1
U1 0
U2 9
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9036-0
J9 PROC SPIE
PY 2012
VL 8358
AR 83580B
DI 10.1117/12.918652
PG 7
WC Remote Sensing; Optics
SC Remote Sensing; Optics
GA BBY46
UT WOS:000308737700008
ER
PT S
AU Lunsford, R
Grun, J
Gump, J
AF Lunsford, Robert
Grun, Jacob
Gump, Jared
BE Fountain, AW
TI High-Resolution Optical Signatures of Fresh and Aged Explosives in the
420nm to 620nm Illumination Range
SO CHEMICAL, BIOLOGICAL, RADIOLOGICAL, NUCLEAR, AND EXPLOSIVES (CBRNE)
SENSING XIII
SE Proceedings of SPIE
LA English
DT Proceedings Paper
CT Conference on Chemical, Biological, Radiological, Nuclear, and
Explosives (CBRNE) Sensing XIII
CY APR 24-27, 2012
CL Baltimore, MD
SP SPIE
ID VIBRATIONAL-SPECTRA; RAMAN-SPECTRA; 2,4,6-TRINITROTOLUENE; PRODUCTS
AB Optical signatures of fresh and aged explosives are measured and compared to determine whether there exist differences in the signatures that can be exploited for detection. The explosives examined are RDX, TNT, and HMX, which have been heated for two weeks at 75 degrees centigrade or irradiated for two weeks with a 15-Watt ultraviolet lamp (254nm).
The optical signatures are obtained by illuminating the samples with a sequence of laser wavelengths between 420nm and 620nm in 10 nm steps and measuring the spectra of light scattered from the sample at each laser wavelength. The measurements are performed on the Naval Research Laboratory's SWOrRD instrument. SWOrRD is capable of illuminating a sample with laser wavelength between 210nm and 2000nm, in steps of 0.1nm, and measuring the spectrum of light scattered from the sample at each wavelength. SWOrRD's broad tuning range, high average power (1-300mW), narrow line width (<4cm(-1)), and rapid wavelength tunability enable these measurements.
Results, based on more than 80 measurements - each at 21 sequential laser wavelengths, indicate that the variation in spectral line amplitude observed when altering laser illumination wavelength differs between fresh and aged explosives. Thus, an instrument for rapid and reagent-less differentiation between aged and fresh explosives, based on illumination with a few appropriately chosen laser wavelengths appears feasible.
C1 [Lunsford, Robert; Grun, Jacob] USN, Div Plasma Phys, Res Lab, Washington, DC USA.
[Grun, Jacob] Naval Res Lab, Div Plasma Phys, Washington, DC USA.
[Gump, Jared] Naval Surface Warfare Ctr, Philadelphia, PA USA.
RP Lunsford, R (reprint author), USN, Div Plasma Phys, Res Lab, Washington, DC USA.
NR 21
TC 0
Z9 0
U1 0
U2 2
PU SPIE-INT SOC OPTICAL ENGINEERING
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
SN 0277-786X
BN 978-0-8194-9036-0
J9 PROC SPIE
PY 2012
VL 8358
AR 83580L
DI 10.1117/12.918621
PG 12
WC Remote Sensing; Optics
SC Remote Sensing; Optics
GA BBY46
UT WOS:000308737700016
ER
PT J
AU Drusinsky, D
AF Drusinsky, Doron
TI Behavioral and Temporal Pattern Detection within Financial Data with
Hidden Information
SO JOURNAL OF UNIVERSAL COMPUTER SCIENCE
LA English
DT Article
DE Hidden Markov Models; UML; statecharts; monitoring; patterns; hidden
data
ID TIME-SERIES; VERIFICATION
AB This paper describes a technique for behavioral and temporal pattern detection within financial data, such as credit card and bank account data, where the required information is only partially visible.
Typically, transaction amount, transaction date, merchant name and type, and location of transaction are all visible data items, i.e., they are readily available in the financial institutions database. In contrast, the transaction status as a business transaction (using a personal card), a personal transaction, an investment related transaction, or perhaps a suspicious transaction, is information not explicitly available in the database. Our behavioral pattern detection technique combines well-known Hidden Markov Model (HMM) techniques for learning and subsequent identification of hidden artifacts, with run-time pattern detection of probabilistic UML-based formal specifications. The proposed approach entails a process in which the end-user first develops his or her deterministic patterns, s/he then identifies hidden artifacts in those patterns. Those artifacts induce the state set of the identifying HMM, whose remaining parameters are learned using standard frequency analysis techniques. In the run-time pattern detection phase, the system emits visible information, used by the HMM to deduce invisible information, and sequences thereof; both types of information are then used by a probabilistic pattern detector to monitor the pattern.
C1 [Drusinsky, Doron] USN, Postgrad Sch, Monterey, CA 93943 USA.
RP Drusinsky, D (reprint author), USN, Postgrad Sch, Monterey, CA 93943 USA.
EM ddrusins@nps.edu
FU U.S. Defense Threat Reduction Agency (DTRA)
FX This research was funded by a grant from the U.S. Defense Threat
Reduction Agency (DTRA).
NR 23
TC 1
Z9 1
U1 1
U2 4
PU GRAZ UNIV TECHNOLGOY, INST INFORMATION SYSTEMS COMPUTER MEDIA-IICM
PI GRAZ
PA INFFELDGASSE 16C, GRAZ, A-8010, AUSTRIA
SN 0948-695X
J9 J UNIVERS COMPUT SCI
JI J. Univers. Comput. Sci.
PY 2012
VL 18
IS 14
BP 1950
EP 1966
PG 17
WC Computer Science, Software Engineering; Computer Science, Theory &
Methods
SC Computer Science
GA 028OB
UT WOS:000310430600004
ER
PT B
AU Martin, K
AF Martin, Keye
BE Abramsky, S
Mislove, M
TI The Scope of a Quantum Channel
SO MATHEMATICAL FOUNDATIONS OF INFORMATION FLOW
SE Proceedings of Symposia in Applied Mathematics
LA English
DT Proceedings Paper
CT Clifford Lectures Information Flow in Physics, Geometry, Logic and
Computation
CY MAR 12-15, 2008
CL Tulane Univ, Math Dept, New Orleans, LA
SP Us Off Naval Res
HO Tulane Univ, Math Dept
DE Capacity; scope; channel; information theory; quantum communication
ID MATHEMATICAL-THEORY; COMMUNICATION; MAPS
AB The capacity of a classical channel is a single number that to a large extent captures its ability to transmit information. Though analogous notions exist for quantum channels, the use of a single number is not particularly informative. For instance, any basis of the state space can be used to represent classical bits, and each representation leads to a classical channel with a capacity all its own. So the ability of a quantum channel to transmit information should minimally depend on all of the different ways classical bits can be represented: instead of a single number, we should measure it with a set of numbers. We call this set, which consists of the range of achievable classical capacities, the scope.
For unital channels on qubits, we establish that scope is in fact a compact interval, provide an exact characterization of it and then show how to systematically calculate it. These results, which rely extensively on the algebraic structure of quantum channels, are then used to design an adaptive scheme for communication in which the participants can maximize the information transmitted after first determining the state of the environment (which we show how to do) and then performing a scope calculation. When this technique is applied to quantum cryptography, it becomes possible to minimize the error rate over any time interval where the environment remains stable. For familiar forms of noise, like bit flipping, the error rate is cut in half.
C1 USN, Res Lab, Ctr High Assurance Comp Syst, Washington, DC 20375 USA.
RP Martin, K (reprint author), USN, Res Lab, Ctr High Assurance Comp Syst, Washington, DC 20375 USA.
EM kmartin@itd.nrl.navy.mil
NR 10
TC 2
Z9 2
U1 1
U2 3
PU AMER MATHEMATICAL SOC
PI PROVIDENCE
PA P.O. BOX 6248, PROVIDENCE, RI 02940 USA
BN 978-0-8218-4923-1
J9 PROC SYM AP
PY 2012
VL 71
BP 183
EP 211
PG 29
WC Mathematics, Applied
SC Mathematics
GA BCI84
UT WOS:000310253500007
ER
PT B
AU Martin, K
Panangaden, P
AF Martin, Keye
Panangaden, Prakash
BE Abramsky, S
Mislove, M
TI Spacetime geometry from causal structure and a measurement
SO MATHEMATICAL FOUNDATIONS OF INFORMATION FLOW
SE Proceedings of Symposia in Applied Mathematics
LA English
DT Proceedings Paper
CT Clifford Lectures Information Flow in Physics, Geometry, Logic and
Computation
CY MAR 12-15, 2008
CL Tulane Univ, Math Dept, New Orleans, LA
SP Us Off Naval Res
HO Tulane Univ, Math Dept
DE Causal structure; topology; geometry; spacetime; domain theory;
measurement
ID COMPACTNESS; CURVES; DOMAIN
AB The causal structure of spacetime defines a partial order on the events of spacetime. In an earlier paper, using techniques from domain theory, we showed that for globally hyperbolic spacetimes one could reconstruct the topology from the causal structure. However, the causal structure determines the metric only up to a local rescaling (a conformal transformation); in a four dimensional spacetime, the metric tensor has ten components, and thus effectively only nine are determined by the causal structure. After establishing the relationship between measurement in domain theory, the concept of global time function and the Lorentz distance, we are able to domain theoretically recover the final tenth component of the metric tensor, thereby obtaining causal reconstruction of not only the topology of spacetime, but also its geometry.
C1 [Martin, Keye] USN, Res Lab, Ctr High Assurance Comp Syst, Washington, DC 20375 USA.
RP Martin, K (reprint author), USN, Res Lab, Ctr High Assurance Comp Syst, Code 5540, Washington, DC 20375 USA.
EM kmartin@itd.nrl.navy.mil; prakash@cs.mcgill.ca
NR 23
TC 0
Z9 0
U1 2
U2 3
PU AMER MATHEMATICAL SOC
PI PROVIDENCE
PA P.O. BOX 6248, PROVIDENCE, RI 02940 USA
BN 978-0-8218-4923-1
J9 PROC SYM AP
PY 2012
VL 71
BP 213
EP 232
PG 20
WC Mathematics, Applied
SC Mathematics
GA BCI84
UT WOS:000310253500008
ER
PT S
AU McGill, RA
Simonson, D
Ta, JH
Nguyen, V
Ozten, Y
Kendziora, C
Stievater, TH
AF McGill, R. Andrew
Simonson, Duane
Ta, Julie H.
Viet Nguyen
Ozten, Yasar
Kendziora, Chris
Stievater, Todd H.
BE Lendlein, A
Behl, M
Feng, Y
Guan, Z
Xie, T
TI Solutochromic Molecular Spectroscopy with a Reference Hydrogen-Bond Acid
Dendrimer
SO MULTIFUNCTIONAL POLYMER-BASED MATERIALS
SE Materials Research Society Symposium Proceedings
LA English
DT Proceedings Paper
CT Symposium V on Multifunctional Polymer-based Materials at the MRS Fall
Meeting and Exhibit
CY NOV 28-DEC 02, 2011
CL Boston, MA
SP IBM Zurich, Helmholtz-Zentrum Geesthacht GmbH, MRS
ID SOLVATOCHROMIC COMPARISON METHOD; CHEMICAL SENSORS; COATINGS; POLYMER;
SCALE
AB A zeroth order dendritic carbosilane structure, SiFA4H with four hexafluoroisopropanol (HFIP) functional groups attached via propyl ligand arms to a central silicon atom, has been developed as a model hydrogen-bond (HB) acid sorbent coating and candidate reference HB acid. The HB donor interaction, through the hydroxyl of the HFIP moiety, with a solute HB base can be monitored by observing the hydroxyl stretching frequency through measurements of SiFA4H FTIR spectra before and during vapor exposure. HFIP hydroxyl stretch shifts, upwards of 700 cm(-1) have been observed depending on the HB base. For a range of HB bases, the resulting hydroxyl stretch shifts correlate directly with the solute HB basicity scale, "B", developed by Abraham et al [1]. A variety of techniques exist to measure solute HB basicity, however, the applicability to examine HB bases delivered as vapors or gases and the simplicity of the measurements described herein, with a reusable reference HB acid sorbent coating and standard FTIR spectrophotometer techniques is attractive for some applications including those with hazardous chemicals. Moreover, as an extension of this work we propose employing SiFA4H or related sorbents as molecular sensing coatings, where the semi-selective sorbent is examined by various infrared (IR) spectroscopic techniques to monitor and identify hazardous chemicals, taking advantage of molecular binding phenomena which occur in the sorbent [2].
C1 [McGill, R. Andrew; Simonson, Duane; Ta, Julie H.; Viet Nguyen; Ozten, Yasar; Kendziora, Chris; Stievater, Todd H.] USN, Res Lab, Washington, DC 20375 USA.
RP McGill, RA (reprint author), USN, Res Lab, Codes 6365, Washington, DC 20375 USA.
NR 10
TC 3
Z9 3
U1 1
U2 4
PU MATERIALS RESEARCH SOC
PI WARRENDALE
PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA
SN 0272-9172
BN 978-1-60511-380-7
J9 MATER RES SOC SYMP P
PY 2012
VL 1403
BP 229
EP 234
DI 10.1557/opl.2012.776
PG 6
WC Materials Science, Characterization & Testing; Polymer Science
SC Materials Science; Polymer Science
GA BCB15
UT WOS:000309561200034
ER
PT J
AU Wei, M
De Pondeca, MSFV
Toth, Z
Parrish, D
AF Wei, M.
De Pondeca, M. S. F. V.
Toth, Z.
Parrish, D.
TI Estimation and calibration of observation impact signals using the
Lanczos method in NOAA/NCEP data assimilation system
SO NONLINEAR PROCESSES IN GEOPHYSICS
LA English
DT Article
ID ENSEMBLE DATA ASSIMILATION; TRANSFORM KALMAN FILTER;
ANALYSIS-PERTURBATION SCHEME; THEORETICAL ASPECTS; PREDICTION SYSTEM;
FORECAST SYSTEM; ANALYSIS ERROR; NCEP; ECMWF; FORMULATION
AB Despite the tremendous progress that has been made in data assimilation (DA) methodology, observing systems that reduce observation errors, and model improvements that reduce background errors, the analyses produced by the best available DA systems are still different from the truth. Analysis error and error covariance are important since they describe the accuracy of the analyses, and are directly related to the future forecast errors, i.e., the forecast quality. In addition, analysis error covariance is critically important in building an efficient ensemble forecast system (EFS).
Estimating analysis error covariance in an ensemble-based Kalman filter DA is straightforward, but it is challenging in variational DA systems, which have been in operation at most NWP (Numerical Weather Prediction) centers. In this study, we use the Lanczos method in the NCEP (the National Centers for Environmental Prediction) Gridpoint Statistical Interpolation (GSI) DA system to look into other important aspects and properties of this method that were not exploited before. We apply this method to estimate the observation impact signals (OIS), which are directly related to the analysis error variances. It is found that the smallest eigenvalue of the transformed Hessian matrix converges to one as the number of minimization iterations increases. When more observations are assimilated, the convergence becomes slower and more eigenvectors are needed to retrieve the observation impacts. It is also found that the OIS over data-rich regions can be represented by the eigenvectors with dominant eigenvalues.
Since only a limited number of eigenvectors can be computed due to computational expense, the OIS is severely underestimated, and the analysis error variance is consequently overestimated. It is found that the mean OIS values for temperature and wind components at typical model levels are increased by about 1.5 times when the number of eigenvectors is doubled. We have proposed four different calibration schemes to compensate for the missing trailing eigenvectors. Results show that the method with calibration for a small number of eigenvectors cannot pick up the observation impacts over the regions with fewer observations as well as a benchmark with a large number of eigenvectors, but proper calibrations do enhance and improve the impact signals over regions with more data.
When compared with the observation locations, the method generally captures the OIS over regions with more observation data, including satellite data over the southern oceans. Over the tropics, some observation impacts may be missed due to the smaller background errors specified in the GSI, which is not related to the method. It is found that a large number of eigenvectors are needed to retrieve impact signals that resemble the banded structures from satellite observations, particularly over the tropics. Another benefit from the Lanczos method is that the dominant eigenvectors can be used in preconditioning the conjugate gradient algorithm in the GSI to speed up the convergence.
C1 [Wei, M.] USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
[De Pondeca, M. S. F. V.; Parrish, D.] NOAA NWS NCEP EMC, Camp Springs, MD 20746 USA.
[Toth, Z.] NOAA OAR ESRL GSD, Forecast Applicat Branch, Boulder, CO USA.
RP Wei, M (reprint author), USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
EM mozheng.wei@nrlssc.navy.mil
RI Toth, Zoltan/I-6624-2015
OI Toth, Zoltan/0000-0002-9635-9194
FU SEMESTER 6.2 project at NRL; Office of Naval Research [0602435N]
FX We thank John Derber and Jim Purser for their careful reviews of the
manuscript with many helpful suggestions and comments which have
improved the presentation. We are grateful to many colleagues at
NCEP/EMC for their help during this work, particularly, Wan-Shu Wu, Russ
Treadon, Xiujuan Su and Daryl Kleist for helpful discussions about GSI
system. We thank Steve Lord for his constant support and encouragement
during this work, Mary Hart for improving the presentation, and Carolyn
Reynolds and Craig Bishop at NRL for helpful discussion and sharing the
FNMOC analysis error estimates with us. M. Wei was funded through
SEMESTER 6.2 project at NRL and supported by the Office of Naval
Research (Program Element 0602435N).
NR 50
TC 3
Z9 3
U1 0
U2 4
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 1023-5809
J9 NONLINEAR PROC GEOPH
JI Nonlinear Process Geophys.
PY 2012
VL 19
IS 5
BP 541
EP 557
DI 10.5194/npg-19-541-2012
PG 17
WC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
SC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
GA 029FG
UT WOS:000310479600006
ER
PT J
AU Martin, J
Wilcox, LC
Burstedde, C
Ghattas, O
AF Martin, James
Wilcox, Lucas C.
Burstedde, Carsten
Ghattas, Omar
TI A STOCHASTIC NEWTON MCMC METHOD FOR LARGE-SCALE STATISTICAL INVERSE
PROBLEMS WITH APPLICATION TO SEISMIC INVERSION
SO SIAM JOURNAL ON SCIENTIFIC COMPUTING
LA English
DT Article
DE MCMC; Stochastic Newton; inverse problems; uncertainty quantification;
Langevin dynamics; low-rank Hessian
ID PDE-CONSTRAINED OPTIMIZATION; MONTE-CARLO METHODS; MODEL-REDUCTION;
UNCERTAINTY QUANTIFICATION; COLLOCATION APPROACH; ALGORITHMS; POSTERIOR;
APPROXIMATION; DISTRIBUTIONS; SIMULATIONS
AB We address the solution of large-scale statistical inverse problems in the framework of Bayesian inference. The Markov chain Monte Carlo (MCMC) method is the most popular approach for sampling the posterior probability distribution that describes the solution of the statistical inverse problem. MCMC methods face two central difficulties when applied to large-scale inverse problems: first, the forward models (typically in the form of partial differential equations) that map uncertain parameters to observable quantities make the evaluation of the probability density at any point in parameter space very expensive; and second, the high-dimensional parameter spaces that arise upon discretization of infinite-dimensional parameter fields make the exploration of the probability density function prohibitive. The challenge for MCMC methods is to construct proposal functions that simultaneously provide a good approximation of the target density while being inexpensive to manipulate. Here we present a so-called Stochastic Newton method in which MCMC is accelerated by constructing and sampling from a proposal density that builds a local Gaussian approximation based on local gradient and Hessian (of the log posterior) information. Thus, the method exploits tools (adjoint-based gradients and Hessians) that have been instrumental for fast (often mesh-independent) solution of deterministic inverse problems. Hessian manipulations (inverse, square root) are made tractable by a low-rank approximation that exploits the compact nature of the data misfit operator. This is analogous to a reduced model of the parameter-to-observable map. The method is applied to the Bayesian solution of an inverse medium problem governed by 1D seismic wave propagation. We compare the Stochastic Newton method with a reference black box MCMC method as well as a gradient-based Langevin MCMC method, and observe at least two orders of magnitude improvement in convergence for problems with up to 65 parameters. Numerical evidence suggests that a 1025 parameter problem converges at the same rate as the 65 parameter problem.
C1 [Martin, James] Univ Texas Austin, Inst Computat Engn & Sci, Computat Sci Engn & Math Grad Program, Austin, TX 78712 USA.
[Wilcox, Lucas C.] USN, Postgrad Sch, Dept Appl Math, Monterey, CA 93943 USA.
[Ghattas, Omar] Univ Texas Austin, Inst Computat Engn & Sci, Jackson Sch Geosci, Austin, TX 78712 USA.
[Ghattas, Omar] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA.
RP Martin, J (reprint author), Univ Texas Austin, Inst Computat Engn & Sci, Computat Sci Engn & Math Grad Program, Austin, TX 78712 USA.
EM jmartin@ices.utexas.edu; me@lucaswilcox.com; carsten@ices.utexas.edu;
omar@ices.utexas.edu
FU AFOSR [FA9550-09-1-0608]; NSF [DMS-0724746, ARC-0941678, CMMI-1028889,
TG-MCA04N026]; DOE [DE-FG02-08ER25860, DE-SC0002710, DE-FC52-08NA28615];
DOE CSGF [DE-FG02-97ER25308]
FX This research was supported by AFOSR grant FA9550-09-1-0608, NSF grants
DMS-0724746, ARC-0941678, and CMMI-1028889, DOE grants
DE-FG02-08ER25860, DE-SC0002710, and DE-FC52-08NA28615, and NSF TeraGrid
award TG-MCA04N026.; This author's research was supported by the DOE
CSGF under grant DE-FG02-97ER25308.
NR 47
TC 57
Z9 57
U1 4
U2 25
PU SIAM PUBLICATIONS
PI PHILADELPHIA
PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA
SN 1064-8275
EI 1095-7197
J9 SIAM J SCI COMPUT
JI SIAM J. Sci. Comput.
PY 2012
VL 34
IS 3
BP A1460
EP A1487
DI 10.1137/110845598
PG 28
WC Mathematics, Applied
SC Mathematics
GA 029DG
UT WOS:000310474400010
ER
PT J
AU Kang, W
Xu, L
AF Kang, Wei
Xu, Liang
TI Optimal placement of mobile sensors for data assimilations
SO TELLUS SERIES A-DYNAMIC METEOROLOGY AND OCEANOGRAPHY
LA English
DT Article
DE sensor placement; observability; optimisation; data assimilation; 4D-Var
ID VARIATIONAL DATA ASSIMILATION; ENSEMBLE KALMAN FILTER; OBSERVATION
IMPACT; ADJOINT SENSITIVITY; SYSTEM; MODEL; FORECAST; 4D-VAR
AB We explore the theoretical framework as well as the associated algorithms for the problem of optimally placing mobile observation platforms to maximise the improvement of estimation accuracy. The approach in this study is based on the concept of observability, which is a quantitative measure of the information provided by sensor data and user-knowledge. To find the optimal sensor locations, the observability is maximised using a gradient projection method. The Burgers equation is used to verify this approach. To prove the optimality of the sensor locations, Monte Carlo experimentations are carried out using standard 4D-Var algorithms based on two sets of data, one from equally spaced sensors and the other from the optimal sensor locations. The results show that, relative to equally spaced sensors, the 4D-Var data assimilation achieves significantly improved estimation accuracy if the sensors are placed at the optimal locations. A robustness study is also carried out in which the error covariance matrix is varied by 50% and the sensor noise covariance is varied by 100%. In addition, both Gaussian and uniform probability distributions are used for the sensor noise and initial estimation errors. In all cases, the optimal sensor locations result in significantly improved estimation accuracy.
C1 [Xu, Liang] USN, Res Lab, Monterey, CA USA.
[Kang, Wei] USN, Postgrad Sch, Monterey, CA USA.
RP Xu, L (reprint author), USN, Res Lab, Monterey, CA USA.
EM liang.xu@nrlmry.navy.mil
FU Naval Research Laboratory; Air Force Office of Scientific Research
FX Supporting sponsors, Naval Research Laboratory and Air Force Office of
Scientific Research, are gratefully acknowledged.
NR 27
TC 7
Z9 7
U1 0
U2 3
PU CO-ACTION PUBLISHING
PI JARFALLA
PA RIPVAGEN 7, JARFALLA, SE-175 64, SWEDEN
SN 0280-6495
J9 TELLUS A
JI Tellus Ser. A-Dyn. Meteorol. Oceanol.
PY 2012
VL 64
AR 17133
DI 10.3402/tellusa.v64i0.17133
PG 12
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 027KH
UT WOS:000310350600001
ER
EF