FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Bell, JL Sloan, LC Revenaugh, J Duffy, PB AF Bell, JL Sloan, LC Revenaugh, J Duffy, PB TI Evaluation of Northern Hemisphere natural climate variability in multiple temperature reconstructions and global climate model simulations SO GLOBAL AND PLANETARY CHANGE LA English DT Article DE climate; climate variability; climate model; spectral analysis ID SURFACE AIR-TEMPERATURE; CENTURIES AB The detection of anthropogenic climate change in observations and the validation of climate models both rely on understanding natural climate variability. To evaluate internal climate variability, we apply spectral analysis to time series of surface air temperature (SAT) from nine coupled general circulation model (GCM) simulations, three recent global paleotemperature reconstructions, and Northern Hemisphere (NH) instrumental records. Our comparison is focused on the NH due to the greater spatial and temporal coverage and validation of the available NH temperature reconstructions. The paleotemperature reconstructions capture the general magnitude of NH climate variability, but not the precise variance and specific spatial, temporal, or periodic signals demonstrated in the instrumental record. The models achieved varying degrees of success for each measure of variability analyzed, with none of the models consistently capturing the appropriate variability. In general, the models performed best in the analysis of combined mean annual land and marine variability. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064 USA. Lawrence Livermore Natl Lab, Climate & Carbon Cycle Modeling Grp, Livermore, CA 94550 USA. RP Bell, JL (reprint author), Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064 USA. NR 25 TC 10 Z9 10 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-8181 J9 GLOBAL PLANET CHANGE JI Glob. Planet. Change PD JUN 10 PY 2003 VL 37 IS 1-2 BP 19 EP 32 DI 10.1016/S0921-8181(02)00189-3 PG 14 WC Geography, Physical; Geosciences, Multidisciplinary SC Physical Geography; Geology GA 683XB UT WOS:000183175400003 ER PT J AU Covey, C AchutaRao, KM Cubasch, U Jones, P Lambert, SJ Mann, ME Phillips, TJ Taylor, KE AF Covey, C AchutaRao, KM Cubasch, U Jones, P Lambert, SJ Mann, ME Phillips, TJ Taylor, KE TI An overview of results from the Coupled Model Intercomparison Project SO GLOBAL AND PLANETARY CHANGE LA English DT Article DE CMIP; GCM; climate ID GENERAL-CIRCULATION MODEL; SURFACE AIR-TEMPERATURE; OCEAN-ATMOSPHERE MODEL; TRANSIENT CLIMATE-CHANGE; SEA-ICE; FLUX ADJUSTMENTS; HEAT TRANSPORTS; GLOBAL CLIMATE; 6 CENTURIES; CO2 AB The Coupled Model Intercomparison Project (CMIP) collects output from global coupled ocean-atmosphere general circulation models (coupled GCMs). Among other uses, such models are employed both to detect anthropogenic effects in the climate record of the past century and to project future climatic changes due to human production of greenhouse gases and aerosols. CMIP has archived output from both constant forcing ("control run") and perturbed (1% per year increasing atmospheric carbon dioxide) simulations. This report summarizes results form 18 CMIP models. A third of the models refrain from employing ad hoc flux adjustments at the ocean-atmosphere interface. The new generation of non-flux-adjusted control runs are nearly as stable as-and agree with observations nearly as well as-the flux-adjusted models. Both flux-adjusted and non-flux-adjusted models simulate an overall level of natural internal climate variability that is within the bounds set by observations. These developments represent significant progress in the state of the art of climate modeling since the Second (1995) Scientific Assessment Report of the Intergovernmental Panel on Climate Change (IPCC; see Gates et al. [Gates, W.L., et al., 1996. Climate models-Evaluation. Climate Climate 1995: The Science of Climate Change, Houghton, J.T., et al. (Eds.), Cambridge Univ. Press, pp. 229-284]). In the increasing-CO2 runs, differences between different models, while substantial, are not as great as one might expect from earlier assessments that relied on equilibrium climate sensitivity. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, PCMDI, Livermore, CA 94551 USA. Free Univ Berlin, Inst Meteorol, D-1000 Berlin, Germany. Univ E Anglia, Climat Res Unit, Norwich NR4 7TJ, Norfolk, England. Canadian Ctr Climate Modelling & Anal, Victoria, BC, Canada. Univ Virginia, Dept Environm Sci, Charlottesville, VA 22903 USA. RP Covey, C (reprint author), Lawrence Livermore Natl Lab, PCMDI, Mail Code L-264, Livermore, CA 94551 USA. RI Jones, Philip/C-8718-2009; Taylor, Karl/F-7290-2011; Mann, Michael/B-8472-2017 OI Jones, Philip/0000-0001-5032-5493; Taylor, Karl/0000-0002-6491-2135; Mann, Michael/0000-0003-3067-296X NR 70 TC 236 Z9 242 U1 4 U2 31 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-8181 J9 GLOBAL PLANET CHANGE JI Glob. Planet. Change PD JUN 10 PY 2003 VL 37 IS 1-2 BP 103 EP 133 DI 10.1016/S0921-8181(02)00193-5 PG 31 WC Geography, Physical; Geosciences, Multidisciplinary SC Physical Geography; Geology GA 683XB UT WOS:000183175400007 ER PT J AU Govindasamy, B Caldeira, K Duffy, PB AF Govindasamy, B Caldeira, K Duffy, PB TI Geoengineering Earth's radiation balance to mitigate climate change from a quadrupling of CO2 SO GLOBAL AND PLANETARY CHANGE LA English DT Article DE anthropogenic CO2; climate change; geoengineering; mitigation of climate change ID OCEAN-ATMOSPHERE MODEL; CARBON-DIOXIDE; CIRCULATION; SENSITIVITY; TRANSPORT; INCREASE; SYSTEM AB It has been suggested that climate change induced by anthropogenic CO2 could be counteracted with geoengineering schemes designed to diminish the solar radiation incident on Earth's surface. Though the spatial and temporal pattern of radiative forcing from greenhouse gases differs from that of sunlight, it was shown in a recent study that these schemes would largely mitigate regional or seasonal climate change for a doubling of the atmospheric CO2 content. Here, we examine the ability of reduced solar luminosity to cancel the effects of quadrupling of CO2 content. In agreement with our previous study, geoengineering schemes could markedly diminish regional and seasonal climate change. However, there are some residual climate changes: in the geoengineered 4 x CO2 climate, a significant decrease in surface temperature and net water flux occurs in the tropics; warming in the high latitudes is not completely compensated; the cooling effect of greenhouse gases in the stratosphere persists and sea ice is not fully restored. However, these residual climate changes are much smaller than the change from quadrupling of CO2 without reducing solar input. Caution should be exercised in interpretation because these results are from a single model with a number of simplifying assumptions. There are also many technical, environmental and political reasons not to implement geoengineering schemes. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Climate & Carbon Cycle Grp, Livermore, CA 94550 USA. RP Govindasamy, B (reprint author), Lawrence Livermore Natl Lab, Climate & Carbon Cycle Grp, Livermore, CA 94550 USA. RI Caldeira, Ken/E-7914-2011 NR 35 TC 49 Z9 51 U1 3 U2 21 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-8181 J9 GLOBAL PLANET CHANGE JI Glob. Planet. Change PD JUN 10 PY 2003 VL 37 IS 1-2 BP 157 EP 168 DI 10.1016/S0921-8181(02)00195-9 PG 12 WC Geography, Physical; Geosciences, Multidisciplinary SC Physical Geography; Geology GA 683XB UT WOS:000183175400009 ER PT J AU Wang, J Rich, PM Price, KP AF Wang, J Rich, PM Price, KP TI Temporal responses of NDVI to precipitation and temperature in the central Great Plains, USA SO INTERNATIONAL JOURNAL OF REMOTE SENSING LA English DT Article ID DIFFERENCE VEGETATION INDEX; CANOPY REFLECTANCE; SOIL-MOISTURE; INTERANNUAL VARIABILITY; SEMIARID BOTSWANA; SENEGALESE SAHEL; AVHRR DATA; TRANSPIRATION; RAINFALL; PHOTOSYNTHESIS AB Normalized Difference Vegetation Index (NDVI) is generally recognized as a good indicator of terrestrial vegetation productivity. Understanding climatic influences, in particular precipitation and temperature, on NDVI enables prediction of productivity changes under different climatic scenarios. We examined temporal responses of remotely sensed NDVI to precipitation and temperature during a nine-year period (1989-97) in Kansas. Biweekly (every two weeks) and monthly precipitation data were derived from 410 weather stations and biweekly temperature data were derived from 17 weather stations inside and around the borders of Kansas. Biweekly and monthly climate maps were derived by interpolation. Biweekly growing season (March-October) NDVI values for Kansas were calculated using National Oceanic and Atmospheric Administration (NOAA) Advanced Very High Resolution Radiometer (AVHRR) NDVI images. Average growing season NDVI values were highly correlated with precipitation received during the current growing season and seven preceding months (15-month duration); biweekly NDVI values were correlated with precipitation received during 2-4 preceding biweekly periods; and response time of NDVI to a major precipitation event was typical 1-2 biweekly periods (2-4 weeks). Temperature was positively correlated with NDVI early and late in the growing season, and there was a weak negative correlation between temperature and NDVI in the mid growing season. Precipitation has the primary influence on NDVI and, by inference, on productivity. The relationship between precipitation and NDVI is strong and predictable when viewed at the appropriate spatial scale. C1 Univ Kansas, Dept Geog, Lawrence, KS 66045 USA. Univ Kansas, Kansas Appl Remote Sensing Program, Lawrence, KS 66045 USA. Univ Kansas, Dept Ecol & Evolutionary Biol, Environm Studies Program, Lawrence, KS 66045 USA. Univ Kansas, Kansas Biol Survey, Lawrence, KS 66045 USA. Los Alamos Natl Lab, Environm Dynam & Spatial Anal Grp, GISLab, Los Alamos, NM 87545 USA. RP Wang, J (reprint author), ICF Consulting Inc, 9300 Lee Highway, Fairfax, VA 22031 USA. NR 34 TC 247 Z9 302 U1 8 U2 65 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0143-1161 J9 INT J REMOTE SENS JI Int. J. Remote Sens. PD JUN 10 PY 2003 VL 24 IS 11 BP 2345 EP 2364 DI 10.1080/01431160210154812 PG 20 WC Remote Sensing; Imaging Science & Photographic Technology SC Remote Sensing; Imaging Science & Photographic Technology GA 676MP UT WOS:000182756100010 ER PT J AU Shellman, SD Lewis, JP Glaesemann, KR Sikorski, K Voth, GA AF Shellman, SD Lewis, JP Glaesemann, KR Sikorski, K Voth, GA TI Massively parallel linear-scaling algorithm in an ab initio local-orbital total-energy method SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID GENERALIZED GRADIENT APPROXIMATION; ELECTRONIC-STRUCTURE CALCULATIONS; DENSITY-FUNCTIONAL THEORY; TIGHT-BINDING; MOLECULAR-DYNAMICS; PSEUDOPOTENTIALS; SYSTEMS; EXCHANGE; MODEL AB Similar to the manner of S. Itoh et al. [Comp. Phys. Commun. 88 (1995) 173], we report implementation of a massively parallel linear-scaling algorithm into an ab initio tight-binding method called FIREBALL [Phys. Rev. B (2001)]. The use of local-orbitals yields a very sparse Hamiltonian matrix which facilitates using a linear-scaling algorithm to obtain the electronic band-structure energy. The general functional form of Kim et al. [Phys. Rev. B 52 (1995) 1640], which minimizes a functional to obtain the electronic band-structure energy, has been parallelized utilizing the conjugate gradient method. The results of this approach are reported here. In addition, the use of "fireball" wavefunctions, where the wavefunctions are explicitly zero beyond some cutoff, allows for pre-generating all integrals describing two- and three-center interactions. The computation of these integrals is then an easily parallelizable problem for which the results are reported. Both integral generation and the linear-scaling optimization procedures are parallelized using the standard MPI message passing interface mixed with an OpenMP strategy. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Univ Utah, Sch Comp, Salt Lake City, UT 84112 USA. Univ Utah, Henry Eyring Ctr Theoret Chem, Salt Lake City, UT 84112 USA. Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Lewis, JP (reprint author), Brigham Young Univ, Dept Phys & Astron, N233 ESC,POB 24658, Provo, UT 84206 USA. RI Glaesemann, Kurt/B-4841-2010; OI Glaesemann, Kurt/0000-0002-9512-1395 NR 33 TC 10 Z9 10 U1 0 U2 2 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD JUN 10 PY 2003 VL 188 IS 1 BP 1 EP 15 DI 10.1016/S0021-9991(03)00069-X PG 15 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 695GL UT WOS:000183822700001 ER PT J AU Larson, DJ AF Larson, DJ TI A Coulomb collision model for PIC plasma simulation SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article AB A new approach to modeling partially collisional plasmas that provides a smooth transition from the fluid (Coulomb collision dominated) to the fully kinetic PIC (collisionless) limit is presented. In addition to the usual quantities of mass, charge, and velocity, each particle carries an isotropic Maxwellian velocity distribution. Higher resolution of velocity space is achieved by generating more particles using a procedure that preserves the first four velocity moments. This velocity space fragmentation is essential for capturing non-Maxwellian plasma behavior. The model developed here allows the efficient simulation of partially collisional plasmas by reducing both the number of particle pairings required per time step and the number of particles needed to retain non-Maxwellian plasma behavior. The method produces reasonable results when the time step is large relative to the collision frequencies and works in the limit of one particle per species per cell. Particle merging can be exploited to control the number of particles in a natural way. The collision process is fully three-dimensional and conserves energy and momentum exactly. Results from 3v and 1d3v simulations are presented and compared with previous multi-fluid and fully kinetic PIC simulations. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM larson6@llnl.gov OI Larson, David/0000-0003-0814-8555 NR 6 TC 15 Z9 15 U1 0 U2 7 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 EI 1090-2716 J9 J COMPUT PHYS JI J. Comput. Phys. PD JUN 10 PY 2003 VL 188 IS 1 BP 123 EP 138 DI 10.1016/S0021-9991(03)00157-8 PG 16 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 695GL UT WOS:000183822700006 ER PT J AU Li, LY Tchelepi, HA Zhang, DX AF Li, LY Tchelepi, HA Zhang, DX TI Perturbation-based moment equation approach for flow in heterogeneous porous media: applicability range and analysis of high-order terms SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE stochastic equations; uncertainty analysis; statistical moments; Monte Carlo simulation; heterogeneous porous media; reservoir simulation; groundwater flow ID SUBSURFACE SOLUTE TRANSPORT; GROUNDWATER-FLOW; STOCHASTIC-ANALYSIS; SPATIAL VARIABILITY; SIMULATION; NONSTATIONARY; UNCERTAINTY; AQUIFERS; MACRODISPERSION; DISPERSION AB We present detailed comparisons between high-resolution Monte Carlo simulation (MCS) and low-order numerical solutions of stochastic moment equations (SMEs) for the first and second statistical moments of pressure. The objective is to quantify the difference between the predictions obtained from MCS and SME. Natural formations with high permeability variability and large spatial correlation scales are of special interest for underground resources (e.g. oil and water). Consequently, we focus on such formations. We investigated fields with variance of log-permeability, sigma(y)(2), from 0.1 to 3.0 and correlation scales (normalized by domain length) of 0.05 to 0.5. In order to avoid issues related to statistical convergence and resolution level, we used 9000 highly resolved realizations of permeability for MCS. We derive exact discrete forms of the statistical moment equations. Formulations based on equations written explicitly in terms of permeability (K-based) and log-transformed permeability (Y-based) are considered. The discrete forms are applicable to systems of arbitrary variance and correlation scales. However, equations governing a particular statistical moment depend on higher moments. Thus, while the moment equations are exact, they are not closed. In particular, the discrete form of the second moment of pressure includes two triplet terms that involve log-permeability (or permeability) and pressure. We combined MCS computations with full discrete SME equations to quantify the importance of the various terms that make up the moment equations. We show that second-moment solutions obtained using a low-order Y-based SME formulation are significantly better than those from K-based formulations, especially when sigma(y)(2) > 1. y As a result, Y-based formulations are preferred. The two triplet terms are complex functions of the variance level and correlation length. The importance (contribution) of these triplet terms increases dramatically as sigma(y)(2) increases above y one. We also show that one of the triplet terms is much more important than the other. When comparing K-based MCS with Y-based SME, model differences must be taken into consideration. These differences (model errors) are due to embedded assumptions and differences in implementing the discrete forms of the equations. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Chevron Texaco E&P Technol Co, San Ramon, CA 94583 USA. Los Alamos Natl Lab, Hydrol Geochem & Geol Grp, Los Alamos, NM 87545 USA. RP Tchelepi, HA (reprint author), Chevron Texaco E&P Technol Co, San Ramon, CA 94583 USA. RI Zhang, Dongxiao/D-5289-2009; Tchelepi, Hamdi/F-4500-2012 OI Zhang, Dongxiao/0000-0001-6930-5994; NR 31 TC 14 Z9 14 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD JUN 10 PY 2003 VL 188 IS 1 BP 296 EP 317 DI 10.1016/S0021-9991(03)00186-4 PG 22 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 695GL UT WOS:000183822700015 ER PT J AU Huang, CS Foster, JC Reeves, GD Watermann, J Sastri, JH Yumoto, K Song, P AF Huang, CS Foster, JC Reeves, GD Watermann, J Sastri, JH Yumoto, K Song, P TI Global magnetospheric-ionospheric oscillations initiated by a solar wind pressure impulse SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE oscillations; magnetospheric oscillations; long periods; ring current; drift echoes ID INTERPLANETARY MAGNETIC-FIELD; PROTON DRIFT ECHOES; GEOMAGNETIC MICROPULSATIONS; ULTRALOW FREQUENCIES; GEOSYNCHRONOUS ORBIT; PLASMA-DENSITY; ULF WAVES; PERIOD; PULSATIONS; EXCITATION AB [1] We present simultaneous observations of long-period (similar to1 hour) global magnetospheric-ionospheric oscillations with multiple spacecraft and ground-based instruments. These oscillations occurred following a major increase in the solar wind dynamic pressure. When the solar wind pressure impulse impinged on the magnetosphere, oscillations of energetic plasma particles in the ring current region were excited. The strongest oscillations came from electrons in the energy range of 75-225 keV with periods of 55-80 min. Ground magnetometers measured periodic (similar to1 hour) enhancements of ionospheric currents from the auroral to equatorial latitudes. However, the solar wind pressure and IMF in this event did not show variations similar to the energetic particle oscillations and/or ground magnetometer deviations. We suggest that the magnetosphere has an intrinsic period of similar to1 hour during quiet times. The magnetospheric oscillations with this period can be initiated by a solar wind pressure impulse. After the initiation the solar wind no longer plays a role in the subsequent evolution of the magnetospheric oscillations. C1 MIT, Haystack Observ, Westford, MA 01886 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Indian Inst Astrophys, Bangalore 560034, Karnataka, India. Univ Massachusetts, Ctr Atmospher Res, Lowell, MA 01854 USA. Danish Inst Fundamental Metrol, Solar Terr Phys Div, DK-2100 Copenhagen O, Denmark. Kyushu Univ, Dept Earth & Planetary Sci, Higashi Ku, Fukuoka 8128581, Japan. RP Huang, CS (reprint author), MIT, Haystack Observ, Route 40, Westford, MA 01886 USA. RI Reeves, Geoffrey/E-8101-2011 OI Reeves, Geoffrey/0000-0002-7985-8098 NR 33 TC 5 Z9 5 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD JUN 10 PY 2003 VL 108 IS A6 AR 1232 DI 10.1029/2002JA009465 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 691YB UT WOS:000183632600001 ER PT J AU Hoover, WG Hoover, CG AF Hoover, WG Hoover, CG TI Links between microscopic and macroscopic fluid mechanics SO MOLECULAR PHYSICS LA English DT Article ID PARTICLE APPLIED MECHANICS; MOLECULAR-DYNAMICS; CONTINUUM-MECHANICS; STATISTICAL-MECHANICS; TIME REVERSIBILITY; CANONICAL ENSEMBLE; TEMPERATURE; EQUILIBRIUM; SIMULATIONS; ENTROPY AB The microscopic and macroscopic versions of fluid mechanics differ qualitatively. Microscopic particles obey time-reversible ordinary differential equations. The resulting particle trajectories {q(t)} may be time-averaged or ensemble-averaged so as to generate field quantities corresponding to macroscopic variables. On the other hand, the macroscopic continuum fields described by fluid mechanics follow irreversible partial differential equations. Smooth particle methods bridge the gap separating these two views of fluids by solving the macroscopic field equations with particle dynamics that resemble molecular dynamics. Recently, nonlinear dynamics have provided some useful tools for understanding the relationship between the microscopic and macroscopic points of view. Chaos and fractals play key roles in this new understanding. Non-equilibrium phase-space averages look very different from their equilibrium counterparts. Away from equilibrium the smooth phase-space distributions are replaced by fractional-dimensional singular distributions that exhibit time irreversibility. C1 Univ Calif Davis, Dept Appl Sci, Livermore, CA 94551 USA. Lawrence Livermore Natl Lab, Methods Dev Grp, Livermore, CA 94551 USA. RP Univ Calif Davis, Dept Appl Sci, Livermore, CA 94551 USA. EM redskunk@starband.net NR 50 TC 20 Z9 21 U1 0 U2 3 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND SN 0026-8976 EI 1362-3028 J9 MOL PHYS JI Mol. Phys. PD JUN 10 PY 2003 VL 101 IS 11 BP 1559 EP 1573 DI 10.1080/0026897021000026647 PG 15 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 701AC UT WOS:000184142500002 ER PT J AU Morkel, M Unterhalt, H Salmeron, M Rupprechter, G Freund, HJ AF Morkel, M Unterhalt, H Salmeron, M Rupprechter, G Freund, HJ TI SFG spectroscopy from 10(-8) to 1000 mbar: less-ordered CO structures and coadsorption on Pd(111) SO SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 7th International Conference on Nanometer-Scale Science and Technology (NANO-7)/21st European Conference on Surface Science (ECOSS-21) CY JUN 24-28, 2002 CL MALMO, SWEDEN SP Swedish Res Council, Danish Nat Sci Res Council, Lund Univ, City Malmo, Nobel Fdn, Swedish Fdn Strateg Res, Swedish Agcy Innovat Syst, Reg Skane, Knowledge Fdn, NKT, USN Off Res, Japan Soc Promot Sci, IST Nanoelect Network PHANTOMS, Amer Vacuum Soc, Int Union Vacuum Sci, Tech & Applicat, Swedish Soc Vacuum Sci, Lund Univ, Nanometer Consortium DE sum frequency generation; catalysis; vibrations of adsorbed molecules; palladium; carbon monoxide; low index single crystal surfaces ID SUM-FREQUENCY GENERATION; SURFACE VIBRATIONAL SPECTROSCOPY; SUPPORTED PD NANOPARTICLES; CARBON-MONOXIDE; ATMOSPHERIC-PRESSURE; ULTRAHIGH-VACUUM; MODEL CATALYSTS; ADSORPTION; HYDROGEN; INTERFACES AB Vibrational sum frequency generation spectroscopy was employed to study "less-ordered" phases resulting from low-temperature CO exposure on Pd(111). Such imperfect structures may also occur under catalytic reaction conditions up to 1000 mbar and originate from the superposition of ordered structures when the CO mobility and flux were insufficient. The effect of coadsorbed hydrogen and water was also examined. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Max Planck Gesell, Fritz Haber Inst, Dept Chem Phys, D-14195 Berlin, Germany. EO Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA. RP Rupprechter, G (reprint author), Max Planck Gesell, Fritz Haber Inst, Dept Chem Phys, Faradayweg 4-6, D-14195 Berlin, Germany. NR 19 TC 19 Z9 19 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD JUN 10 PY 2003 VL 532 BP 103 EP 107 DI 10.1016/S0039-6028(03)00197-3 PG 5 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 693FG UT WOS:000183705900019 ER PT J AU Maruyama, T Luh, DA Brachmann, A Clendenin, JE Garwin, EL Harvey, S Kirby, RE Prescott, CY AF Maruyama, T Luh, DA Brachmann, A Clendenin, JE Garwin, EL Harvey, S Kirby, RE Prescott, CY TI Atomic hydrogen cleaning of polarized GaAs photocathodes SO APPLIED PHYSICS LETTERS LA English DT Article ID ELECTRON SOURCE; PHOTOEMISSION; PASSIVATION; REMOVAL; PLASMA; CHARGE AB Atomic hydrogen cleaning followed by heat cleaning at 450degreesC was used to prepare negative-electron-affinity GaAs photocathodes. When hydrogen ions were eliminated, quantum efficiencies of 15% were obtained for bulk GaAs cathodes, higher than the results obtained using conventional 600degreesC heat cleaning. The low-temperature cleaning technique was applied to thin strained GaAs cathodes used for producing highly polarized electrons. No depolarization was observed even when the optimum cleaning time of about 30 s was extended by a factor of 100. (C) 2003 American Institute of Physics. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. RP Maruyama, T (reprint author), Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RI LUH, DAH-AN/B-3921-2008; Schaff, William/B-5839-2009 NR 19 TC 11 Z9 11 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUN 9 PY 2003 VL 82 IS 23 BP 4184 EP 4186 DI 10.1063/1.1581981 PG 3 WC Physics, Applied SC Physics GA 685FA UT WOS:000183249100059 ER PT J AU Leimkuhler, S Hodson, R George, GN Rajagopalan, KV AF Leimkuhler, S Hodson, R George, GN Rajagopalan, KV TI Recombinant Rhodobacter capsulatus xanthine dehydrogenase, a useful model system for the characterization of protein variants leading to xanthinuria I in humans SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID ASPERGILLUS-NIDULANS; MOLYBDENUM COFACTOR; CRYSTAL-STRUCTURES; NITRATE REDUCTASE; ESCHERICHIA-COLI; OXIDASE; GENE; MECHANISM; FORMS; IDENTIFICATION AB Rhodobacter capsulatus xanthine dehydrogenase (XDH) forms an (alphabeta)(2) heterotetramer and is highly homologous to homodimeric eukaryotic XDHs. The crystal structures of bovine XDH and R. capsulatus XDH showed that the two proteins have highly similar folds. We have developed an efficient system for the recombinant expression of R. capsulatus XDH in Escherichia coli. The recombinant protein shows spectral features and a range of substrate specificities similar to bovine milk xanthine oxidase. However, R. capsulatus XDH is at least 5 times more active than bovine XDH and, unlike mammalian XDH, does not undergo the conversion to the oxidase form. EPR spectra were obtained for the FeS centers of the enzyme showing an axial signal for FeSI, which is different from that reported for xanthine oxidase. X-ray absorption spectroscopy at the iron and molybdenum K-edge and the tungsten L-III-edge have been used to probe the different metal coordinations of variant forms of the enzyme. Based on a mutation identified in a patient suffering from xanthinuria I, the corresponding arginine 135 was substituted to a cysteine in R. capsulatus XDH, and the protein variant was purified and characterized. Two different forms of XDH-R135C were purified, an active (alphabeta)(2) heterotetrameric form and an inactive (alphabeta) heterodimeric form. The active form contains a full complement of redox centers, whereas in the inactive form the FeSI center is likely to be missing. C1 Tech Univ Carolo Wilhelmina Braunschweig, Dept Plant Biol, D-38023 Braunschweig, Germany. Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. Duke Univ, Med Ctr, Dept Biochem, Durham, NC 27710 USA. RP Leimkuhler, S (reprint author), Tech Univ Carolo Wilhelmina Braunschweig, Dept Plant Biol, D-38023 Braunschweig, Germany. RI George, Graham/E-3290-2013 FU NIGMS NIH HHS [GM 44283] NR 33 TC 39 Z9 39 U1 0 U2 2 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 JUN 6 PY 2003 VL 278 IS 23 BP 20802 EP 20811 DI 10.1074/jbc.M303091200 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 684WY UT WOS:000183230500048 PM 12670960 ER PT J AU Elam, JS Malek, K Rodriguez, JA Doucette, PA Taylor, AB Hayward, LJ Cabelli, DE Valentine, JS Hart, PJ AF Elam, JS Malek, K Rodriguez, JA Doucette, PA Taylor, AB Hayward, LJ Cabelli, DE Valentine, JS Hart, PJ TI An alternative mechanism of bicarbonate-mediated peroxidation by copper-zinc superoxide dismutase - Rates enhanced via proposed enzyme-associated peroxycarbonate intermediate SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID AMYOTROPHIC-LATERAL-SCLEROSIS; ELECTRON-DENSITY MAPS; HYDROGEN-PEROXIDE; CU,ZN-SUPEROXIDE DISMUTASE; MUTANT SUPEROXIDE-DISMUTASE-1; RADICAL PRODUCTION; AXONAL-TRANSPORT; MOUSE MODEL; K-M; INACTIVATION AB Hydrogen peroxide can interact with the active site of copper-zinc superoxide dismutase (SOD1) to generate a powerful oxidant. This oxidant can either damage amino acid residues at the active site, inactivating the enzyme (the self-oxidative pathway), or oxidize substrates exogenous to the active site, preventing inactivation (the external oxidative pathway). It is well established that the presence of bicarbonate anion dramatically enhances the rate of oxidation of exogenous substrates. Here, we show that bicarbonate also substantially enhances the rate of self-inactivation of human wild type SOD1. Together, these observations suggest that the strong oxidant formed by hydrogen peroxide and SOD1 in the presence of bicarbonate arises from a pathway mechanistically distinct from that producing the oxidant in its absence. Self-inactivation rates are further enhanced in a mutant SOD1 protein (L38V) linked to the fatal neurodegenerative disorder, familial amyotrophic lateral sclerosis. The 1.4 Angstrom resolution crystal structure of pathogenic SOD1 mutant D125H reveals the mode of oxyanion binding in the active site channel and implies that phosphate anion attenuates the bicarbonate effect by competing for binding to this site. The orientation of the enzyme-associated oxyanion suggests that both the self-oxidative and external oxidative pathways can proceed through an enzyme-associated peroxycarbonate intermediate. C1 Univ Texas, Hlth Sci Ctr, Dept Biochem, X Ray Crystallog Core Lab, San Antonio, TX 78229 USA. Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA. Univ Massachusetts, Sch Med, Dept Neurol, Worcester, MA 01655 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Valentine, JS (reprint author), Univ Texas, Hlth Sci Ctr, Dept Biochem, X Ray Crystallog Core Lab, 7703 Floyd Curl Dr, San Antonio, TX 78229 USA. RI Valentine, Joan/B-6665-2008 OI Valentine, Joan/0000-0002-7174-925X FU NIGMS NIH HHS [GM28222]; NINDS NIH HHS [NS39112, NS44170, R01 NS039112, R01 NS044170] NR 53 TC 61 Z9 61 U1 1 U2 5 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 JUN 6 PY 2003 VL 278 IS 23 BP 21032 EP 21039 DI 10.1074/jbc.M300484200 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 684WY UT WOS:000183230500077 PM 12649272 ER PT J AU Le, HT Schaldach, CM Firestone, GL Bjeldanes, LF AF Le, HT Schaldach, CM Firestone, GL Bjeldanes, LF TI Plant-derived 3,3 '-diindolylmethane is a strong androgen antagonist in human prostate cancer cells SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID CYCLE ARREST; BRASSICA VEGETABLES; BINDING DOMAIN; LIVING CELLS; RECEPTOR; INDOLE-3-CARBINOL; ANTIGEN; BREAST; APOPTOSIS; LNCAP AB 3,3'-Diindolylmethane ( DIM) is a major digestive product of indole-3-carbinol, a potential anticancer component of cruciferous vegetables. Our results indicate that DIM exhibits potent antiproliferative and antiandrogenic properties in androgen-dependent human prostate cancer cells. DIM suppresses cell proliferation of LNCaP cells and inhibits dihydrotestosterone (DHT) stimulation of DNA synthesis. These activities were not produced in androgen-independent PC-3 cells. Moreover, DIM inhibited endogenous PSA transcription and reduced intracellular and secreted PSA protein levels induced by DHT in LNCaP cells. Also, DIM inhibited, in a concentration-dependent manner, the DHT-induced expression of a prostate-specific antigen promoter-regulated reporter gene construct in transiently transfected LNCaP cells. Similar effects of DIM were observed in PC-3 cells only when these cells were cotransfected with a wild-type androgen receptor expression plasmid. Using fluorescence imaging with green fluorescent protein androgen receptor and Western blot analysis, we demonstrated that DIM inhibited androgen-induced androgen receptor (AR) translocation into the nucleus. Results of receptor binding assays indicated further that DIM is a strong competitive inhibitor of DHT binding to the AR. Results of structural modeling studies showed that DIM is remarkably similar in conformational geometry and surface charge distribution to an established synthetic AR antagonist, although the atomic compositions of the two substances are quite different. Taken together with our published reports of the estrogen agonist activities of DIM, the present results establish DIM as a unique bifunctional hormone disrupter. To our knowledge, DIM is the first example of a pure androgen receptor antagonist from plants. C1 Univ Calif Berkeley, Dept Nutr Sci & Toxicol, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Bjeldanes, LF (reprint author), Univ Calif Berkeley, Dept Nutr Sci & Toxicol, Berkeley, CA 94720 USA. FU NIEHS NIH HHS [P30-ES01896] NR 51 TC 108 Z9 115 U1 1 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 JUN 6 PY 2003 VL 278 IS 23 BP 21136 EP 21145 DI 10.1074/jbc.M300588200 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 684WY UT WOS:000183230500090 PM 12665522 ER PT J AU Guest, A Schubert, G Gable, CW AF Guest, A Schubert, G Gable, CW TI Stress field in the subducting lithosphere and comparison with deep earthquakes in Tonga SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article DE stress; subduction; Tonga; phase transformations; viscoelastic rheology; numerical modeling ID CRYSTAL ELASTIC PROPERTIES; METASTABLE OLIVINE WEDGE; OCEANIC LITHOSPHERE; FOCUS EARTHQUAKES; PHASE-TRANSITIONS; SYSTEM MG2SIO4-FE2SIO4; DESCENDING SLAB; SPINEL PHASE; MANTLE; TEMPERATURE AB [1] We present a numerical model of the subducting lithosphere that provides an alternative explanation for stresses causing deep earthquakes. Our model lithosphere is composed of alpha olivine, beta spinel, gamma spinel, and perovskite + magnesiowustite. The heat conduction equation is solved to determine temperature conditions in the slab and to locate the equilibrium phase transformations in pressure-temperature space. Volumetric strains in the subducting lithosphere are calculated from the density of individual phases and from the heat released or consumed in the phase changes. These strains are used as sources of stress in the subducting lithosphere. Dislocation creep and Peierls stress creep laws are included in the viscoelastic rheology. Volumetric reductions due to equilibrium phase transformations cause high shear stress in the transition zone because of the variable viscosity inside the subducting slab. Aspects of the model shear stresses are in agreement with observations of high seismic activity in the Tonga-Wadati Benioff zone. Compression is oriented along the dip of the slab, and extension is oriented in the plane perpendicular to the compression axis. Since our model stresses agree with the seismic observations, and because the model stresses are larger than those caused by buoyancy forces, our model provides a possible explanation of stresses causing deep earthquakes. Also, our model does not need metastability of olivine to explain the occurrence of high shear stress in the transition zone. C1 Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA. Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. Inst Geophys, Prague, Czech Republic. Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA. RP Guest, A (reprint author), Univ Calif Los Angeles, Dept Earth & Space Sci, 595 E Charles E Young Dr, Los Angeles, CA 90095 USA. EM alice@ess.ucla.edu; schubert@ucla.edu; gable@lanl.gov RI Gable, Carl/B-4689-2011 NR 46 TC 7 Z9 7 U1 0 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD JUN 6 PY 2003 VL 108 IS B6 AR 2288 DI 10.1029/2002JB002161 PG 16 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 690PF UT WOS:000183557000007 ER PT J AU Holcomb, DJ Olsson, WA AF Holcomb, DJ Olsson, WA TI Compaction localization and fluid flow SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article DE permeability; compaction; localization; Castlegate ID POROUS ROCK; DEFORMATION; BANDS; SANDSTONE; COMPRESSION; GROWTH; FOAM; MODE AB [1] When subjected to nonhydrostatic, compressive stresses, some porous sandstones exhibit nonuniform compaction. The compaction occurs as a localization process, analogous to shear localization, but results in a thickening, tabular zone of compaction as opposed to culminating in a shear fracture. We report the results of several triaxial compression experiments done at a confining pressure of 45 MPa on Castlegate sandstone, measuring simultaneously, stress, strain, acoustic emission locations, and permeability. A major result is that compaction localization produces up to a 2 order-of-magnitude decrease in permeability. Correlation of local strain measurements and acoustic emission locations made on the same specimen show that the compaction process proceeds as a propagating front approximately 20 mm thick. A model of the compaction process was developed that incorporates the moving boundary between compacted, low-permeability regions and uncompacted, higher-permeability regions, and compaction-induced fluid injection at the boundaries. Because of the inhomogeneous nature of compaction produced by compaction localization, and its temporal evolution, a number of phenomena related to fluid flow are predicted by the model: locally increased pore pressures and spatial changes in the effective permeability. Experimental results are reported that show the evolution of effective permeability to be linear with respect to the distance the compaction fronts propagated as predicted by the model. Implications of the results for future experimentation and for reservoirs are briefly discussed; in particular, the interaction between compaction-induced fluid pressure and compaction localization should lead to a phenomenon analogous to dilatancy hardening, impeding the propagation of compaction bands. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Holcomb, DJ (reprint author), Sandia Natl Labs, POB 5800,MS 0751, Albuquerque, NM 87185 USA. EM djholco@sandia.gov; waolsso@sandia.gov NR 28 TC 43 Z9 46 U1 1 U2 8 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD JUN 6 PY 2003 VL 108 IS B6 AR 2290 DI 10.1029/2001JB000813 PG 13 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 690PF UT WOS:000183557000001 ER PT J AU Reichhardt, CJO Reichhardt, C AF Reichhardt, CJO Reichhardt, C TI Frustration and melting of colloidal molecular crystals SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NEW MEXICO ID OPTICAL TWEEZER ARRAYS; GRAPHITE; TRANSITION; LATTICES; PHASES AB Using numerical simulations we show that a variety of novel colloidal crystalline states and multi-step melting phenomena occur on square and triangular two-dimensional periodic substrates. At half-integer fillings different kinds of frustration effects can be realized. A two-step melting transition can occur in which individual colloidal molecules initially rotate, destroying the overall orientational order, followed by the onset of interwell colloidal hopping, in good agreement with recent experiments. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Theoret, CNLS, Los Alamos, NM 87545 USA. RP Reichhardt, CJO (reprint author), Los Alamos Natl Lab, Div Theoret, T-12, Los Alamos, NM 87545 USA. OI Reichhardt, Cynthia/0000-0002-3487-5089 NR 18 TC 5 Z9 5 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 5841 EP 5845 AR PII S0305-4470(03)54941-1 DI 10.1088/0305-4470/36/22/303 PG 5 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400006 ER PT J AU Daligault, J Guet, C AF Daligault, J Guet, C TI Large amplitude femtosecond electron dynamics in metal clusters SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NM ID SODIUM CLUSTERS AB We present a theoretical model that allows us to study linear and non-linear aspects of the femtosecond electron dynamics in metal clusters. The theoretical approach consists in the classical limit of the time-dependent Kohn-Sham equations. The electrons are described by a phase-space distribution function which satisfies a Vlasov-like equation while the ions are treated classically. This allows simulations for clusters containing several hundreds of atoms and extending up to several hundreds of femtoseconds during which the description conserves the fermionic character of the electron distribution. This semiquantal approach compares very well with the purely quantal treatment. As an application of this approach, we show the prominent role of the electron dynamics during and after the interaction with an intense femtosecond laser pulse. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. CEA, DAM Ile France, Dept Phys Theor & Appliq, F-91680 Bruyeres Le Chatel, France. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM daligaul@lanl.gov RI Guet, Claude/O-6607-2016 NR 12 TC 2 Z9 3 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 5847 EP 5855 AR PII S0305-4470(03)54994-0 DI 10.1088/0305-4470/36/22/304 PG 9 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400007 ER PT J AU Bonitz, M Semkat, D Filinov, A Golubnychyi, V Kremp, D Gericke, DO Murillo, MS Filinov, V Fortov, V Hoyer, W Koch, SW AF Bonitz, M Semkat, D Filinov, A Golubnychyi, V Kremp, D Gericke, DO Murillo, MS Filinov, V Fortov, V Hoyer, W Koch, SW TI Theory and simulation of strong correlations in quantum Coulomb systems SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NM ID PHASE-TRANSITION; HYDROGEN PLASMA; TIME; RELAXATION; EQUATIONS; MATTER AB Strong correlations in quantum Coulomb systems (QCS) are attracting increasing interest in many fields ranging from dense plasmas and semiconductors to metal clusters and ultracold trapped ions. Examples are bound states in dense plasmas (atoms, molecules, clusters) and semiconductors (excitons, trions, biexcitons) or Coulomb crystals. We present first-principle simulation results of these systems including path integral Monte Carlo simulations of the equilibrium behaviour of dense hydrogen and electron-hole plasmas and molecular dynamics and quantum kinetic theory simulations of the nonequilibrium properties of QCS. Finally, we critically assess potential and limitations of the various methods in their application to Coulomb systems. C1 Univ Rostock, Fachbereich Phys, D-18051 Rostock, Germany. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Russian Acad Sci, Inst High Energy Dens, Moscow 127412, Russia. Univ Marburg, Fac Phys & Zentrum Mat Wissensch, D-35032 Marburg, Germany. RP Univ Rostock, Fachbereich Phys, D-18051 Rostock, Germany. EM michael.bonitz@physik.uni-rostock.de RI Bonitz, Michael/A-6873-2010; Filinov, Alexey/D-3955-2016 OI Bonitz, Michael/0000-0001-7911-0656; NR 36 TC 60 Z9 61 U1 1 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 5921 EP 5930 AR PII S0305-4470(03)55274-X DI 10.1088/0305-4470/36/22/313 PG 10 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400016 ER PT J AU Schlanges, M Vorberger, J DeWitt, HE Kraeft, DW AF Schlanges, M Vorberger, J DeWitt, HE Kraeft, DW TI Equation of state and correlation energy of dense plasmas SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NEW MEXICO ID SHOCKED LIQUID DEUTERIUM; THERMODYNAMIC PROPERTIES; SIMULATIONS; HUGONIOT; MBAR AB In this paper, the method of thermodynamic Green's functions is applied to investigate thermodynamic properties of dense weakly coupled plasmas. First, we present results for the equation of state for fully ionized hydrogen and compare our results with path integral Monte Carlo simulation data. Densities and temperatures are considered where correlations as well as Fermi statistics have to be taken into account. Then, the correlation energy and the mean value of the kinetic energy of dense plasmas are considered. Usually one finds that the kinetic energy is larger than that of an ideal system due to the interaction. However, in agreement with results from quantum simulations, we found, for certain densities and temperatures, a lowering of the kinetic energy. C1 Univ Greifswald, Inst Phys, D-17489 Greifswald, Germany. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Schlanges, M (reprint author), Univ Greifswald, Inst Phys, Domstr 10A, D-17489 Greifswald, Germany. RI Vorberger, Jan/D-9162-2015 NR 25 TC 2 Z9 2 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 5949 EP 5955 AR PII S0305-4470(03)54938-1 DI 10.1088/0305-4470/36/22/316 PG 7 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400019 ER PT J AU Gregori, G Glenzer, SH Landen, OL AF Gregori, G Glenzer, SH Landen, OL TI Strong coupling corrections in the analysis of x-ray Thomson scattering measurements SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NEW MEXICO ID ELECTRON LIQUIDS; PLASMAS; DENSE; STATE; GAS AB We present simplified expressions for the dynamic structure factor, or form factor S(k, omega), which is the quantity describing the inelastic x-ray scattering cross section from a dense plasma or a simple liquid. Our results, based on the random phase approximation (RPA) for the treatment on the charged particle coupling, are compared with analytical expressions for the free electron dynamic structure factor which include effects of strong coupling in both classical and degenerate plasmas. We will show that these modifications introduce minimal corrections to the RPA for typical conditions found in recent non-collective x-ray Thomson scattering experiment on solid density isochorically heated laser plasmas. On the other hand, strong collective scattering may exhibit significant deviations from the RPA. The results shown in this work can be applied to interpreting future x-ray scattering in warm dense plasmas occurring in inertial confinement fusion experiments or for the modelling of solid density matter found in the interior of planets. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Gregori, G (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. NR 33 TC 28 Z9 28 U1 1 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 5971 EP 5980 AR PII S0305-4470(03)55746-8 DI 10.1088/0305-4470/36/22/319 PG 10 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400022 ER PT J AU Tierney, TE Montgomery, DS Benage, JF Wysocki, FJ Murillo, MS AF Tierney, TE Montgomery, DS Benage, JF Wysocki, FJ Murillo, MS TI Modelling of collective Thomson scattering from collisional plasmas SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NEW MEXICO ID ION-ACOUSTIC-WAVES; LIGHT-SCATTERING; FREQUENCY AB Anomalous broadening of ion-acoustic modes has been observed using collective Thomson scattering from both the electron plasma and ion-acoustic waves in ion-collisional plasmas. Ion-acoustic waves may be broadened by Landau damping, plasma inhomogeneities and instrumental effects. A model was constructed to calculate the contribution of these effects based upon spatially and spectrally resolved measurements of collective Thomson scattering. Collisional broadening effects were then calculated using a modification of the Mermin formalism. The computational model was used to interpret experimental measurements of collisional damping rates in dense, moderately coupled, plasmas. Collisional broadening is weakly dependent of ion-acoustic frequency in nearly isothermal plasmas; and therefore collective Thomson scattering can be used as a measurement technique for collisional damping rates provided all additional broadening mechanisms are taken into account. This paper further demonstrates that modelling of collective Thomson scattering from ion-collisional ion-acoustic modes must account for inhomogeneities, Landau damping, and collisions in order to evaluate plasma parameters, such as temperature and average ionization. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Tierney, TE (reprint author), Los Alamos Natl Lab, POB 1663,Mailstop E526, Los Alamos, NM 87545 USA. OI Montgomery, David/0000-0002-2355-6242 NR 18 TC 7 Z9 7 U1 1 U2 8 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 5981 EP 5989 AR PII S0305-4470(03)55359-8 PG 9 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400023 ER PT J AU LaGattuta, KJ AF LaGattuta, KJ TI Introduction to the quantum trajectory method and to Fermi molecular dynamics SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NEW MEXICO ID WAVELENGTH LASER-RADIATION; MULTIPLE IONIZATION; PHOTOIONIZATION; ATOMS AB The quantum trajectory method (QTM) will be introduced, and an approximation to the QTM known as Fermi molecular dynamics (FMD) will be described. Results of simulations based on FMD will be mentioned for specific nonequilibrium systems dominated by Coulomb interactions. C1 Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87544 USA. RP LaGattuta, KJ (reprint author), Los Alamos Natl Lab, Div Appl Phys, X-1, Los Alamos, NM 87544 USA. NR 12 TC 4 Z9 4 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 6013 EP 6018 AR PII S0305-4470(03)54657-1 DI 10.1088/0305-4470/36/22/324 PG 6 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400027 ER PT J AU Gericke, DO Murillo, MS Semkat, D Bonitz, M Kremp, D AF Gericke, DO Murillo, MS Semkat, D Bonitz, M Kremp, D TI Relaxation of strongly coupled Coulomb systems after rapid changes of the interaction potential SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NM ID CONSERVATION; EQUATION AB The relaxation of charged particle systems after sudden changes of the pair interaction strength is investigated. As examples, we show the results for plasmas after ionization and after a rapid change of screening. Comparisons are made between molecular dynamics simulation and a kinetic description based on the Kadanoff-Baym equations. We found the latter very sensitive to the way the scattering cross section is treated. We also predict the new equilibrium state requiring only conservation of energy. In this case, the correlation energy is computed using the hypernetted chain approximation. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Rostock, FB Phys, D-18051 Rostock, Germany. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RI Bonitz, Michael/A-6873-2010 OI Bonitz, Michael/0000-0001-7911-0656 NR 11 TC 21 Z9 21 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 6087 EP 6093 AR PII S0305-4470(03)55341-0 DI 10.1088/0305-4470/36/22/334 PG 7 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400037 ER PT J AU Gericke, DO Murillo, MS Bonitz, M Semkat, D AF Gericke, DO Murillo, MS Bonitz, M Semkat, D TI Temperature estimates for quantum systems after an ionization induced rapid switch of the spin statistics SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NM ID BOSE-EINSTEIN CONDENSATION; ULTRACOLD NEUTRAL PLASMA; ATOMIC GAS AB It has recently become possible to create ultracold plasmas in the microkelvin temperature regime. Unfortunately, these plasmas are created in a disordered state and the build up of Coulomb correlations leads to rapid electron and ion heating that can be understood in terms of energy conservation. We explore this disorder-induced heating for the ionization of degenerate gases. In particular, we consider the ionization of fermionic gases, which are partially ordered by the Pauli exclusion principle, and the subsequent heating of the bosonic ions. The introduction of fermionic correlations mitigates the heating of the ions. However, we find from energy conservation that the final state for typical experimental situations is a classical plasma where the bosonic character of the particles is negligible. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Rostock, FB Phys, D-18051 Rostock, Germany. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM gericke@lanl.gov RI Bonitz, Michael/A-6873-2010 OI Bonitz, Michael/0000-0001-7911-0656 NR 15 TC 3 Z9 3 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 6095 EP 6101 AR PII S0305-4470(03)55337-9 DI 10.1088/0305-4470/36/22/335 PG 7 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400038 ER PT J AU Knudson, MD Hanson, DL Bailey, JE Lemke, RW Hall, CA Deeney, C Asay, JR AF Knudson, MD Hanson, DL Bailey, JE Lemke, RW Hall, CA Deeney, C Asay, JR TI Equation of state measurements in liquid deuterium to 100 GPa SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NM ID REFLECTED SHOCK EXPERIMENTS; INSULATOR-METAL TRANSITION; DENSE HYDROGEN; TEMPERATURE-MEASUREMENTS; 1-6 MBAR; HUGONIOT; HOT; DISSOCIATION; VELOCITIES AB Using intense magnetic pressure, a method was developed to launch flyer plates to velocities in excess of 20 km s(-1). This technique was used to perforin plate-impact, shock wave experiments on cryogenic liquid deuterium (LD2) to examine its high-pressure equation of state (EOS). Using an impedance matching method, Hugoniot measurements were obtained in the pressure range of 22-100 GPa. The results of these experiments disagree with the previously reported Hugoniot measurements of LD2 in the pressure range above similar to40 GPa, but are in good agreement with first principles, ab initio models for hydrogen and its isotopes. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 38 TC 7 Z9 7 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 6149 EP 6158 AR PII S0305-4470(03)54991-5 DI 10.1088/0305-4470/36/22/342 PG 10 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400045 ER PT J AU Militzer, B AF Militzer, B TI Path integral calculation of shock Hugoniot curves of precompressed liquid deuterium SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NM ID EQUATION; STATE; HYDROGEN AB Path integral Monte Carlo simulations have been used to study deuterium at high pressure and temperature. The equation of state has been derived in the temperature and density regions of 10 000 less than or equal to T less than or equal to 1000 000 K and 0.6 less than or equal to rho less than or equal to 2.5 g cm(-3). A series of shock Hugoniot curves is computed for different initial compressions in order to compare with current and future shock wave experiments using liquid deuterium samples precompressed in diamond anvil cells. RP Lawrence Livermore Natl Lab, Dept Phys, Livermore, CA 94550 USA. NR 21 TC 2 Z9 2 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 6159 EP 6164 AR PII S0305-4470(03)54954-X DI 10.1088/0305-4470/36/22/343 PG 6 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400046 ER PT J AU De Witt, E Slattery, WL Chugunov, AI Baiko, DA Yakovlev, G AF De Witt, E Slattery, WL Chugunov, AI Baiko, DA Yakovlev, G TI Pair distribution of ions in Coulomb lattice SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NEW MEXICO ID ONE-COMPONENT PLASMA; WHITE-DWARFS; CRYSTALS; SIMULATIONS; TRANSPORT; EQUATION; MATTER; STATE AB The pair distribution function g (r) equivalent to g (x, y, z) and the radial pair distribution function g(r) of ions in body-centred-cubic and face-centred-cubic Coulomb crystals are calculated within the harmonic-lattice (HL) approximation in a wide temperature range, from the high-temperature classical limit (T much greater than (h) over barw(p), w(p) being the ion plasma frequency) to the low-temperature quantum limit (T much less than (h) over barw(p)). In the classical limit, g(r) is also calculated by the Monte Carlo (MC) method. MC and HL results are demonstrated to be in good agreement. With decreasing T, the correlation peaks of g(r) and g(r) become narrower. At T much less than (h) over barw(p) they become temperature independent (determined by zero-point ion vibrations). C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia. RP De Witt, E (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RI Chugunov, Andrey/E-2061-2014 NR 14 TC 2 Z9 2 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 6221 EP 6226 AR PII S0305-4470(03)54425-0 PG 6 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400054 ER PT J AU Daligault, J Murillo, MS AF Daligault, J Murillo, MS TI Dynamic form factor of two-component plasmas beyond the static local field approximation SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NEW MEXICO ID THOMSON SCATTERING; COLLECTIVE MOTION; LIGHT-SCATTERING; DENSE AB lThe spectrum of ion density fluctuations in a strongly coupled plasma is described both within the static G(k, 0) and high-frequency G(k, infinity) local field approximation. By a direct comparison with molecular dynamics data, we find that for large coupling, G(k, 0) is inadequate. Based on this result, we employ the Zwanzig-Mori memory function approach to model the Thomson scattering cross section, i.e. the electron dynamic form factor S-ee(k, omega) of a dense two-component plasma. We show the sensitivity of S-ee(k, omega) to three approximations for G(k, omega). C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Daligault, J (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 22 TC 4 Z9 4 U1 1 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 6265 EP 6272 AR PII S0305-4470(03)55289-1 DI 10.1088/0305-4470/36/22/357 PG 8 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400060 ER PT J AU Murillo, MS Gericke, DO AF Murillo, MS Gericke, DO TI Structural and collective properties of two-dimensional Yukawa liquids SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article; Proceedings Paper CT International Conference on Strongly Coupled Coulomb Systems (SCCS) CY SEP 02-06, 2002 CL SANTA FE, NM ID COUPLED DUSTY PLASMAS; TRANSPORT-COEFFICIENTS; ELECTRON LIQUIDS; SHEAR VISCOSITY; SELF-DIFFUSION; WAVE-VECTORS; SYSTEMS; MODES AB The radial distribution function of two-dimensional Yukawa systems has been computed with the hypernetted chain equations and compared with molecular dynamics simulations. A comparison is also made with similar quantities in three-dimensional systems. The importance of the bridge function in two dimensions is illustrated. Collective behaviour is described in terms of the dynamic structure factor S(q, omega); inclusion of the local field correction G (q, omega) incorporates physics beyond the random phase approximation. Simulation results are compared with renormalized mean-field approximations G (q, omega) approximate to G(q, 0) and G(q, omega) G(q, infinity). These approximations fail to capture details of the spectrum. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM murillo@lanl.gov NR 28 TC 15 Z9 15 U1 1 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD JUN 6 PY 2003 VL 36 IS 22 BP 6273 EP 6280 AR PII S0305-4470(03)55652-9 DI 10.1088/0305-4470/36/22/358 PG 8 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 691PJ UT WOS:000183614400061 ER PT J AU Kevrekidis, PG Frantzeskakis, DJ Malomed, BA Bishop, AR Kevrekidis, IG AF Kevrekidis, PG Frantzeskakis, DJ Malomed, BA Bishop, AR Kevrekidis, IG TI Dark-in-bright solitons in Bose-Einstein condensates with attractive interactions SO NEW JOURNAL OF PHYSICS LA English DT Article ID NONLINEAR SCHRODINGER-EQUATION; OSCILLATORY INSTABILITIES; BREATHERS; ARRAYS; DECAY AB We demonstrate a possibility to generate localized states in effectively one-dimensional Bose-Einstein condensates with a negative scattering length in the form of a dark soliton in the presence of an optical lattice (OL) and/or a parabolic magnetic trap. We connect such structures with twisted localized modes (TLMs) that were previously found in the discrete nonlinear Schrodinger equation. Families of these structures are found as functions of the OL strength, tightness of the magnetic trap and chemical potential, and their stability regions are identified. Stable bound states of two TLMs are also found. In the case when the TLMs are unstable, their evolution is investigated by means of direct simulations, demonstrating that they transform into large-amplitude fundamental solitons. An analytical approach is also developed, showing that two or several fundamental solitons, with the phase shift p between adjacent ones, may form stable bound states, with parameters quite close to those of the TLMs revealed by simulations. TLM structures are also found numerically and explained analytically in the case when the OL is absent, the condensate being confined only by the magnetic trap. C1 Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA. Univ Athens, Dept Phys, Athens 15784, Greece. Tel Aviv Univ, Fac Engn, Dept Interdisciplinary Studies, IL-69978 Tel Aviv, Israel. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA. Princeton Univ, Program Appl & Computat Math, Princeton, NJ 08544 USA. RP Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA. EM kevrekid@math.umass.edu NR 47 TC 23 Z9 23 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 1367-2630 J9 NEW J PHYS JI New J. Phys. PD JUN 6 PY 2003 VL 5 AR 64 DI 10.1088/1367-2630/5/1/364 PG 17 WC Physics, Multidisciplinary SC Physics GA 690BH UT WOS:000183527100008 ER PT J AU Acosta, D Affolder, T Akimoto, H Albrow, MG Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Behari, S Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berryhill, J Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bolla, G Bolshov, A Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A Bromberg, C Brozovic, M Brubaker, E Bruner, N Budagov, J Budd, HS Burkett, K Busetto, G Byrum, KL Cabrera, S Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Caskey, W Castro, A Cauz, D Cerri, A Cerrito, L Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, JY Chung, WH Chung, YS Ciobanu, CI Clark, AG Coca, M Colijn, AP Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S De Cecco, S DeJongh, F Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M De Pedis, D Derwent, PF Devlin, T Dionisi, C Dittmann, JR Dominguez, A Donati, S D'Onofrio, M Dorigo, T Eddy, N Einsweiler, K Engels, E Erbacher, R Errede, D Errede, S Eusebi, R Fan, Q Fang, HC Farrington, S Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Flores-Castillo, LR Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallas, A Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Gerdes, DW Gerstein, E Giagu, S Giannetti, P Giolo, K Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Goncharov, M Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Green, C Gresele, A Grim, G Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Haas, RM Haber, C Hahn, SR Halkiadakis, E Hall, C Handa, T Handler, R Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Hennecke, M Herndon, M Hill, C Hocker, A Hoffman, KD Hollebeek, R Holloway, L Hou, S Huffman, BT Hughes, R Huston, J Huth, J Ikeda, H Incandela, J Introzzi, G Iori, M Ivanov, A Iwai, J Iwata, Y Iyutin, B James, E Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Kang, J Unel, MK Karr, K Kartal, S Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Kennedy, RD Kephart, R Khazins, D Kikuchi, T Kilminster, B Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, TH Kim, YK Kirby, M Kirk, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kotelnikov, K Kovacs, E Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kurino, K Kuwabara, T Kuznetsova, N Laasanen, AT Lai, KW Lai, N Lami, S Lammel, S Lancaster, J Lannon, K Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Le, Y Lee, J Lee, SW Leonardo, N Leone, S Lewis, JD Li, K Lin, CS Lindgren, M Liss, TM Liu, JB Liu, T Liu, YC Litvintsev, DO Lobban, O Lockyer, NS Loginov, A Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martignon, G Martin, M Martin, A Martin, V Matthews, JAJ Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Miyazaki, Y Moggi, N Moore, E Moore, R Morita, Y Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Nachtman, J Nagaslaev, V Nahn, S Nakada, H Nakano, I Napora, R Niell, F Nelson, C Nelson, T Neu, C Neubauer, MS Neuberger, D Newman-Holmes, C Ngan, CYP Nigmanov, T Niu, H Nodulman, L Nomerotski, A Oh, SH Oh, YD Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Partos, D Patrick, J Pauletta, G Paulini, M Pauly, T Paus, C Pellett, D Penzo, A Pescara, L Phillips, TJ Piacentino, G Piedra, J Pitts, KT Pompos, A Pondrom, L Pope, G Pratt, T Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Rademacker, J Rakitine, A Ratnikov, F Ray, H Reher, D Reichold, A Renton, P Rescigno, M Ribon, A Riegler, W Rimondi, F Ristori, L Riveline, M Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Ryan, D Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sarkar, S Sato, H Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Siegrist, J Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Snider, FD Snihur, R Solodsky, A Spalding, J Speer, T Spezziga, M Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sukhanov, A Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thompson, AS Thomson, E Thurman-Keup, R Tipton, P Tkaczyk, S Toback, D Tollefson, K Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Tsybychev, D Turini, N Ukegawa, F Unverhau, T Vaiciulis, T Valls, J Varganov, A Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Vucinic, D Wagner, RG Wagner, RL Wagner, W Wallace, NB Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Watanabe, T Waters, D Watts, T Weber, M Wenzel, H Wester, WC Whitehouse, B Wicklund, AB Wicklund, E Wilkes, T Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Wolter, M Worm, S Wu, X Wurthwein, F Wyss, J Yang, UK Yao, W Yeh, GP Yeh, P Yi, K Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Yun, JC Zanello, L Zanetti, A Zetti, F Zucchelli, S AF Acosta, D Affolder, T Akimoto, H Albrow, MG Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Behari, S Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berryhill, J Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bolla, G Bolshov, A Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A Bromberg, C Brozovic, M Brubaker, E Bruner, N Budagov, J Budd, HS Burkett, K Busetto, G Byrum, KL Cabrera, S Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Caskey, W Castro, A Cauz, D Cerri, A Cerrito, L Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, JY Chung, WH Chung, YS Ciobanu, CI Clark, AG Coca, M Colijn, AP Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S De Cecco, S DeJongh, F Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M De Pedis, D Derwent, PF Devlin, T Dionisi, C Dittmann, JR Dominguez, A Donati, S D'Onofrio, M Dorigo, T Eddy, N Einsweiler, K Engels, E Erbacher, R Errede, D Errede, S Eusebi, R Fan, Q Fang, HC Farrington, S Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Flores-Castillo, LR Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallas, A Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Gerdes, DW Gerstein, E Giagu, S Giannetti, P Giolo, K Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Goncharov, M Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Green, C Gresele, A Grim, G Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Haas, RM Haber, C Hahn, SR Halkiadakis, E Hall, C Handa, T Handler, R Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Hennecke, M Herndon, M Hill, C Hocker, A Hoffman, KD Hollebeek, R Holloway, L Hou, S Huffman, BT Hughes, R Huston, J Huth, J Ikeda, H Incandela, J Introzzi, G Iori, M Ivanov, A Iwai, J Iwata, Y Iyutin, B James, E Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Kang, J Unel, MK Karr, K Kartal, S Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Kennedy, RD Kephart, R Khazins, D Kikuchi, T Kilminster, B Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, TH Kim, YK Kirby, M Kirk, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kotelnikov, K Kovacs, E Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kurino, K Kuwabara, T Kuznetsova, N Laasanen, AT Lai, KW Lai, N Lami, S Lammel, S Lancaster, J Lannon, K Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Le, Y Lee, J Lee, SW Leonardo, N Leone, S Lewis, JD Li, K Lin, CS Lindgren, M Liss, TM Liu, JB Liu, T Liu, YC Litvintsev, DO Lobban, O Lockyer, NS Loginov, A Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martignon, G Martin, M Martin, A Martin, V Matthews, JAJ Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Miyazaki, Y Moggi, N Moore, E Moore, R Morita, Y Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Nachtman, J Nagaslaev, V Nahn, S Nakada, H Nakano, I Napora, R Niell, F Nelson, C Nelson, T Neu, C Neubauer, MS Neuberger, D Newman-Holmes, C Ngan, CYP Nigmanov, T Niu, H Nodulman, L Nomerotski, A Oh, SH Oh, YD Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Partos, D Patrick, J Pauletta, G Paulini, M Pauly, T Paus, C Pellett, D Penzo, A Pescara, L Phillips, TJ Piacentino, G Piedra, J Pitts, KT Pompos, A Pondrom, L Pope, G Pratt, T Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Rademacker, J Rakitine, A Ratnikov, F Ray, H Reher, D Reichold, A Renton, P Rescigno, M Ribon, A Riegler, W Rimondi, F Ristori, L Riveline, M Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Ryan, D Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sarkar, S Sato, H Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Siegrist, J Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Snider, FD Snihur, R Solodsky, A Spalding, J Speer, T Spezziga, M Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sukhanov, A Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thompson, AS Thomson, E Thurman-Keup, R Tipton, P Tkaczyk, S Toback, D Tollefson, K Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Tsybychev, D Turini, N Ukegawa, F Unverhau, T Vaiciulis, T Valls, J Varganov, A Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Vucinic, D Wagner, RG Wagner, RL Wagner, W Wallace, NB Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Watanabe, T Waters, D Watts, T Weber, M Wenzel, H Wester, WC Whitehouse, B Wicklund, AB Wicklund, E Wilkes, T Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Wolter, M Worm, S Wu, X Wurthwein, F Wyss, J Yang, UK Yao, W Yeh, GP Yeh, P Yi, K Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Yun, JC Zanello, L Zanetti, A Zetti, F Zucchelli, S CA CDF Collaboration TI Search for associated production of Upsilon and vector boson in p(p)over-bar collisions at root(s)over-bar=1.8 TeV SO PHYSICAL REVIEW LETTERS LA English DT Article ID SILICON VERTEX DETECTOR; CHARGED HIGGS AB We present a search for associated production of the Y(1S) and a vector boson in 83 pb(-1) of p (p) over bar collisions at roots=1.8 TeV collected by the CDF experiment in 1994-1995. We find no evidence of the searched signal in the data, and set upper limits to the production cross sections. C1 Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Brandeis Univ, Waltham, MA 02254 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Cantabria, Inst Fis Cantabria, CSIC, E-39005 Santander, Spain. Carnegie Mellon Univ, Pittsburgh, PA 15218 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Duke Univ, Durham, NC 27708 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Florida, Gainesville, FL 32611 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Geneva, CH-1211 Geneva, Switzerland. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Harvard Univ, Cambridge, MA 02138 USA. 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RI Gallas Torreira, Abraham Antonio/K-6508-2014; Scodellaro, Luca/K-9091-2014; Paulini, Manfred/N-7794-2014; vilar, rocio/P-8480-2014; Cabrera Urban, Susana/H-1376-2015; Prokoshin, Fedor/E-2795-2012; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Leonardo, Nuno/M-6940-2016; Nomerotski, Andrei/A-5169-2010; St.Denis, Richard/C-8997-2012; Chiarelli, Giorgio/E-8953-2012; Ivanov, Andrew/A-7982-2013; Kim, Soo-Bong/B-7061-2014; Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Ruiz, Alberto/E-4473-2011; De Cecco, Sandro/B-1016-2012; Wolter, Marcin/A-7412-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012; Punzi, Giovanni/J-4947-2012 OI Gallas Torreira, Abraham Antonio/0000-0002-2745-7954; Scodellaro, Luca/0000-0002-4974-8330; Paulini, Manfred/0000-0002-6714-5787; Prokoshin, Fedor/0000-0001-6389-5399; Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Leonardo, Nuno/0000-0002-9746-4594; Chiarelli, Giorgio/0000-0001-9851-4816; Ivanov, Andrew/0000-0002-9270-5643; Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052 NR 11 TC 4 Z9 4 U1 1 U2 5 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 JUN 6 PY 2003 VL 90 IS 22 AR 221803 DI 10.1103/PhysRevLett.90.221803 PG 7 WC Physics, Multidisciplinary SC Physics GA 687MT UT WOS:000183381200007 PM 12857307 ER PT J AU Aubert, B Barate, R Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kral, JF Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Harrison, TJ Hawkes, CM Knowles, DJ Penny, RC Watson, AT Watson, NK Deppermann, T Goetzen, K Koch, H Lewandowski, B Pelizaeus, M Peters, K Schmuecker, H Steinke, M Barlow, NR Bhimji, W Boyd, JT Chevalier, N Clark, PJ Cottingham, WN Mackay, C Wilson, FF Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P McKemey, AK Blinov, VE Bukin, AD Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Chao, M Kirkby, D Lankford, AJ Mandelkern, M McMahon, S Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Schwanke, U Sharma, V Berryhill, JW Campagnari, C Dahmes, B Kuznetsova, N Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beringer, J Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Barillari, T Blanc, F Bloom, P Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Zhang, J Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Dubitzky, RS Hauke, A Lacker, HM 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Bowerman, DA Dauncey, PD Egede, U Eschrich, I Morton, GW Nash, JA Sanders, P Taylor, GP Back, JJ Bellodi, G Harrison, PF Shorthouse, HW Strother, P Vidal, PB Cowan, G Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, RJ Forti, AC Hart, PA Jackson, F Lafferty, GD Lyon, AJ Weatherall, JH Williams, JC Farbin, A Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Staengle, H Willocq, S Winterton, J Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Milek, M Patel, PM Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Hast, C Taras, P Nicholson, H Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C Baak, MA Raven, G LoSecco, JM Gabriel, TA Brau, B Pulliam, T Brau, J Frey, R Iwasaki, M Potter, CT Sinev, NB 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Kozanecki, W Langer, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Coupal, DP Dong, D Dorfan, J Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Grauges-Pous, E Hadig, T Halyo, V Hryn'ova, T Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Menke, S Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Robertson, SH Roodman, A Salnikov, AA Schietinger, T Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Tanaka, HA Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Meyer, TI Roat, C Ahmed, S Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Schwitters, RF Izen, JM Kitayama, I Lou, XC Bianchi, F Bona, M Gamba, D Bosisio, L Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Hu, H Johnson, JR Liu, R Lodovico, FD Mohapatra, AK Pan, Y Prepost, R Sekula, SJ von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H AF Aubert, B Barate, R Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kral, JF Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Harrison, TJ Hawkes, CM Knowles, DJ Penny, RC Watson, AT Watson, NK Deppermann, T Goetzen, K Koch, H Lewandowski, B Pelizaeus, M Peters, K Schmuecker, H Steinke, M Barlow, NR Bhimji, W Boyd, JT Chevalier, N Clark, PJ Cottingham, WN Mackay, C Wilson, FF Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P McKemey, AK Blinov, VE Bukin, AD Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Chao, M Kirkby, D Lankford, AJ Mandelkern, M McMahon, S Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Schwanke, U Sharma, V Berryhill, JW Campagnari, C Dahmes, B Kuznetsova, N Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beringer, J Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Barillari, T Blanc, F Bloom, P Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Zhang, J Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Dubitzky, RS Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J T'Jampens, S Thiebaux, C Vasileiadis, G Verderi, M Bernet, R Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Tinslay, J Borean, C Bozzi, C Piemontese, L Sarti, A Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Pastore, FC Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Morii, M Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Bionta, RM Brigljevic, V Cheng, CH Lange, DJ Wright, DM Bevan, AJ Fry, JR Gabathuler, E Gamet, R Kay, M Payne, DJ Sloane, RJ Touramanis, C Aspinwall, ML Bowerman, DA Dauncey, PD Egede, U Eschrich, I Morton, GW Nash, JA Sanders, P Taylor, GP Back, JJ Bellodi, G Harrison, PF Shorthouse, HW Strother, P Vidal, PB Cowan, G Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, RJ Forti, AC Hart, PA Jackson, F Lafferty, GD Lyon, AJ Weatherall, JH Williams, JC Farbin, A Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Staengle, H Willocq, S Winterton, J Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Milek, M Patel, PM Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Hast, C Taras, P Nicholson, H Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C Baak, MA Raven, G LoSecco, JM Gabriel, TA Brau, B Pulliam, T Brau, J Frey, R Iwasaki, M Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Buono, LD Hamon, O Leruste, P Ocariz, J Pivk, M Roos, L Stark, J Manfredi, PF Re, V Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Triggiani, G Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Varnes, EW Bellini, F Cavoto, G del Re, D Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Leonardi, E Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Serra, M Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Coupal, DP Dong, D Dorfan, J Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Grauges-Pous, E Hadig, T Halyo, V Hryn'ova, T Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Menke, S Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Robertson, SH Roodman, A Salnikov, AA Schietinger, T Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Tanaka, HA Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Meyer, TI Roat, C Ahmed, S Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Schwitters, RF Izen, JM Kitayama, I Lou, XC Bianchi, F Bona, M Gamba, D Bosisio, L Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Hu, H Johnson, JR Liu, R Lodovico, FD Mohapatra, AK Pan, Y Prepost, R Sekula, SJ von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H CA BABAR Collaboration TI Measurement of the branching fraction, and bounds on the CP-violating asymmetries, of neutral B decays to (DD -/+)-D-*+/- SO PHYSICAL REVIEW LETTERS LA English DT Article ID PHYSICS; MESONS AB We present measurements of the branching fraction and CP-violating asymmetries for neutral B decays to D*+/-D-/+. The measurement uses a data sample of approximately 88x10(6) Y(4S)-->B (B) over bar decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy e(+)-e(-) collider. By fully reconstructing the D*+/-D-/+ decay products, we measure the branching fraction to be (8.8+/-1.0+/-1.3)x10(-4) and the time-integrated CP-violating asymmetry between the rates to D*-D+ and D*+D- to be A=-0.03+/-0.11+/-0.05. We also measure the time-dependent CP-violating asymmetry parameters to be S-+=-0.24+/-0.69+/-0.12, C-+=-0.22+/-0.37+/-0.10 for B-->D*-D+ and S+-=-0.82+/-0.75+/-0.14, C+-=-0.47+/-0.40+/-0.12 for B-->D*+D-. In each case, the first error is statistical and the second error is systematic. C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, LLR, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Florida A&M Univ, Tallahassee, FL 32307 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ Sci & Technol, Ames, IA 50011 USA. Lab Accelerateur Lineaire, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 3BX, Merseyside, England. Univ London Imperial Coll Sci Technol & Med, London SW7 2BW, England. Univ London, London E1 4NS, England. Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40202 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. Natl Inst Nucl & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands. Univ Notre Dame, Notre Dame, IN 46556 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, I-35131 Padua, Italy. Univ Paris 06, Lab Phys Nucl HE, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France. Univ Pavia, Dipartimento Elettr, I-27100 Pavia, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Dipartimento Fis, Scuola Normale Super, I-56010 Pisa, Italy. Ist Nazl Fis Nucl, I-56010 Pisa, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. CEA Saclay, DAPNIA, F-91191 Gif Sur Yvette, France. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Perugia, I-06100 Perugia, Italy. Univ Basilicata, I-85100 Potenza, Italy. RP Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Peters, Klaus/C-2728-2008; Bellini, Fabio/D-1055-2009; Sarti, Alessio/I-2833-2012; de Groot, Nicolo/A-2675-2009; Rotondo, Marcello/I-6043-2012; Neri, Nicola/G-3991-2012; Lista, Luca/C-5719-2008; Cavallo, Nicola/F-8913-2012; de Sangro, Riccardo/J-2901-2012; Patrignani, Claudia/C-5223-2009; Forti, Francesco/H-3035-2011; Monge, Maria Roberta/G-9127-2012; Kravchenko, Evgeniy/F-5457-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; Bagnasco, Stefano/J-4324-2012 OI Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Peters, Klaus/0000-0001-7133-0662; Bellini, Fabio/0000-0002-2936-660X; Sarti, Alessio/0000-0001-5419-7951; Rotondo, Marcello/0000-0001-5704-6163; Neri, Nicola/0000-0002-6106-3756; de Sangro, Riccardo/0000-0002-3808-5455; Patrignani, Claudia/0000-0002-5882-1747; Forti, Francesco/0000-0001-6535-7965; Monge, Maria Roberta/0000-0003-1633-3195; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; NR 17 TC 15 Z9 15 U1 0 U2 5 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 JUN 6 PY 2003 VL 90 IS 22 AR 221801 DI 10.1103/PhysRevLett.90.221801 PG 7 WC Physics, Multidisciplinary SC Physics GA 687MT UT WOS:000183381200005 ER PT J AU Curro, NJ Sarrao, JL Thompson, JD Pagliuso, PG Kos, S Abanov, A Pines, D AF Curro, NJ Sarrao, JL Thompson, JD Pagliuso, PG Kos, S Abanov, A Pines, D TI Low-frequency spin dynamics in the CeMIn5 materials SO PHYSICAL REVIEW LETTERS LA English DT Article ID MAGNETICALLY MEDIATED SUPERCONDUCTIVITY; HEAVY-FERMION SUPERCONDUCTORS; NUCLEAR-QUADRUPOLE; CERHIN5; CECOIN5; RESONANCE; PRESSURE; CEIRIN5; NMR; NQR AB We measure the spin lattice relaxation of the planar In(1) nuclei in the CeMIn5 materials, extract quantitative information about the low energy spin dynamics of the lattice of Ce moments in both CeRhIn5 and CeCoIn5, and identify a crossover in the normal state. Above a temperature T-* the Ce lattice exhibits "Kondo gas" behavior characterized by local fluctuations of independently screened moments; below T-* both systems exhibit a "Kondo liquid" regime in which interactions between the local moments contribute to the spin dynamics. Both the antiferromagnetic and superconducting ground states in these systems emerge from the Kondo liquid regime. Our analysis provides strong evidence for quantum criticality in CeCoIn5. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil. RP Curro, NJ (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA. RI Pagliuso, Pascoal/C-9169-2012; Kos, Simon/G-3289-2016; Curro, Nicholas/D-3413-2009; Inst. of Physics, Gleb Wataghin/A-9780-2017 OI Kos, Simon/0000-0003-1657-9793; Curro, Nicholas/0000-0001-7829-0237; NR 29 TC 40 Z9 40 U1 0 U2 4 PU AMERICAN 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 JUN 6 PY 2003 VL 90 IS 22 AR 227202 DI 10.1103/PhysRevLett.90.227202 PG 4 WC Physics, Multidisciplinary SC Physics GA 687MT UT WOS:000183381200037 PM 12857337 ER PT J AU Kozub, VI Lopatin, AV Vinokur, VM AF Kozub, VI Lopatin, AV Vinokur, VM TI Josephson transport through a Hubbard impurity center SO PHYSICAL REVIEW LETTERS LA English DT Article ID MAGNETORESISTANCE AB We investigate the Josephson transport through a thin semiconductor barrier containing impurity centers with the on-site Hubbard interaction u of an arbitrary sign and strength. We find that in the case of the repulsive interaction the Josephson current changes sign with the temperature increase if the energy of the impurity level epsilon (measured from the Fermi energy of superconductors) falls in the interval (-u,0). We predict strong temporal fluctuations of the current if only a few centers are present within the junction. In the case of the attractive impurity potential (u<0) and at low temperatures, the model is reduced to the effective two level Hamiltonian allowing thus a simple description of the nonstationary Josephson effect in terms of pair tunneling processes. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia. RP Kozub, VI (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Kozub, Veniamin/E-4017-2014 NR 7 TC 6 Z9 6 U1 0 U2 2 PU AMERICAN 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 JUN 6 PY 2003 VL 90 IS 22 AR 226805 DI 10.1103/PhysRevLett.90.226805 PG 4 WC Physics, Multidisciplinary SC Physics GA 687MT UT WOS:000183381200034 PM 12857334 ER PT J AU Beiersdorfer, P Boyce, KR Brown, GV Chen, H Kahn, SM Kelley, RL May, M Olson, RE Porter, FS Stahle, CK Tillotson, WA AF Beiersdorfer, P Boyce, KR Brown, GV Chen, H Kahn, SM Kelley, RL May, M Olson, RE Porter, FS Stahle, CK Tillotson, WA TI Laboratory simulation of charge exchange-produced x-ray emission from comets SO SCIENCE LA English DT Article ID IONS; COLLISIONS AB In laboratory experiments using the engineering spare microcalorimeter detector from the ASTRO-E satellite mission, we recorded the x-ray emission of highly charged ions of carbon, nitrogen, and oxygen, which simulates charge exchange reactions between heavy ions in the solar wind and neutral gases in cometary comae. The spectra are complex and do not readily match predictions. We developed a charge exchange emission model that successfully reproduces the soft x-ray spectrum of comet Linear C/1999 S4, observed with the Chandra X-ray Observatory. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Columbia Univ, Dept Phys, New York, NY 10027 USA. Univ Missouri, Dept Phys, Rolla, MO 65409 USA. RP Beiersdorfer, P (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,L-260, Livermore, CA 94550 USA. RI Porter, Frederick/D-3501-2012; Kelley, Richard/K-4474-2012 OI Porter, Frederick/0000-0002-6374-1119; NR 22 TC 116 Z9 117 U1 0 U2 12 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 JUN 6 PY 2003 VL 300 IS 5625 BP 1558 EP 1559 DI 10.1126/science.1084373 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 686QU UT WOS:000183333100051 PM 12791989 ER PT J AU Gu, LH AF Gu, LH TI Comment on "Climate and management contributions to recent trends in US agricultural yields" SO SCIENCE LA English DT Editorial Material C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37830 USA. RP Gu, LH (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37830 USA. RI Gu, Lianhong/H-8241-2014 OI Gu, Lianhong/0000-0001-5756-8738 NR 1 TC 0 Z9 0 U1 0 U2 0 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 JUN 6 PY 2003 VL 300 IS 5625 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 686QU UT WOS:000183333100024 ER PT J AU Smalley, JF Geng, L Chen, A Feldberg, SW Lewis, NS Cali, G AF Smalley, JF Geng, L Chen, A Feldberg, SW Lewis, NS Cali, G TI An indirect laser-induced temperature jump study of the influence of redox couple adsorption on heterogeneous electron transfer kinetics SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY LA English DT Article DE electron transfer; adsorption; indirect laser-induced temperature jump ID THIOL COATED ELECTRODES; OMEGA-HYDROXY THIOL; ALKANETHIOL MONOLAYERS; AU-ELECTRODES; ELECTROCHEMISTRY; GOLD; PLATINUM; SYSTEM; METAL; FERRICYANIDE AB The indirect laser-induced temperature jump technique is used to study the heterogeneous electron transfer kinetics of F(CN)(6)(3-/4-), Ru(NH3)(6)(3+/2+) (both in aqueous 1 M KF) and dimethylferrocene/dimethylferrocenium (Me(2)Fc, in 1 M LiClO4 in CH3OH) on Au electrodes. Evidence is obtained demonstrating not only that all three of these redox couples adsorb on Au but also that the behavior of the measured electron transfer kinetics for these couples is significantly perturbed from that expected for simple heterogeneous electron transfer reactions. The interpretation of the results of these measurements is, therefore, made much more complex and uncertain. Such complexity and uncertainty is greatly reduced by irreversibly attaching the redox moiety to the electrode surface as a part of a stable, organized structure (e.g. a self-assembled monolayer). (C) 2003 Elsevier Science B.V. All rights reserved. C1 Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA. RP Smalley, JF (reprint author), Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. NR 40 TC 25 Z9 25 U1 2 U2 15 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0022-0728 J9 J ELECTROANAL CHEM JI J. Electroanal. Chem. PD JUN 5 PY 2003 VL 549 BP 13 EP 24 DI 10.1016/S0022-0728(03)00284-5 PG 12 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA 694UC UT WOS:000183792100002 ER PT J AU DeSain, JD Klippenstein, SJ Miller, JA Taatjes, CA AF DeSain, JD Klippenstein, SJ Miller, JA Taatjes, CA TI Measurements, theory, and modeling of OH formation in ethyl plus O-2 and propyl plus O-2 reactions SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID HYDROGEN-ATOM ABSTRACTION; PRODUCT FORMATION; MOLECULAR-OXYGEN; ETHYLPEROXY RADICALS; PRESSURE-DEPENDENCE; REACTION-MECHANISM; C2H5+O-2 REACTION; REACTION-KINETICS; COMBUSTION CHEMISTRY; ETHANE COMBUSTION AB The time-resolved formation of OH from ethyl + 02 and propyl + 02 reactions has been measured by OH laser-induced fluorescence in pulsed-photolytic Cl-initiated oxidation of ethane and propane between 296 and 700 K. The propane oxidation produces more OH at each temperature than does ethane oxidation. Above 600 K, the peak amplitudes of the CH signals from both reactions increase sharply with increasing temperature. Solutions to the time-dependent master equation for the C2H5 + O-2, i-C3H7 + O-2, and n-C3H7 + O-2 reactions, employing previously published ab initio characterizations of the stationary points of the systems, have been used to produce temperature-dependent parameterizations that predict the rate constants for formation of all of the products (R + O-2, RO2, QOOH, OH + aldehydes, OH + O-heterocycles, HO2 + alkene). These parameterizations are utilized in rate equation models to compare to experimental results for HO2 and OH formation in Cl-initiated ethane and propane oxidation. The models accurately describe the time behavior and amplitude of the HO2 from both oxidation systems. However, the model underpredicts the amount of OH observed at high temperatures (>600 K) and overpredicts the amount of OH observed at lower temperatures (less than or equal to600 K). C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. RP Taatjes, CA (reprint author), Sandia Natl Labs, Combust Res Facil, Mail Stop 9055, Livermore, CA 94551 USA. NR 79 TC 103 Z9 104 U1 6 U2 48 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 JUN 5 PY 2003 VL 107 IS 22 BP 4415 EP 4427 DI 10.1021/jp0221946 PG 13 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 684TU UT WOS:000183223300012 ER PT J AU Yang, M Chou, KC Somorjai, GA AF Yang, M Chou, KC Somorjai, GA TI In-situ observation of pi-allyl c-C6H9 intermediate during high-pressure cyclohexene catalytic reactions on pt(111) using sum frequency generation vibrational spectroscopy SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID BISMUTH-COVERED PT(111); ETHYLENE HYDROGENATION; CYCLIC HYDROCARBONS; SURFACE-REACTIONS; C-6 HYDROCARBONS; CRYSTAL-SURFACES; DEHYDROGENATION; ADSORPTION; 1,4-CYCLOHEXADIENE; ORIENTATION AB Surface vibrational sum frequency generation (SFG) has been used to identify surface species in situ during catalytic reactions of 1.5 Torr cyclohexene (C6H10) in the presence and absence of 15 Torr H-2 on Pt(111) crystal surfaces. Various surface species were observed during the reactions in the range 303-483 K. Upon adsorption at 303 K in the absence of H-2, cyclohexene is dehydrogenated to form 1,4-cyclohexadiene (C6H8). At 323 K, this species converts to pi-allyl c-C6H9 intermediate. At temperature higher than 423 K, benzene coexists with C6H9 on the surface. Similar results were obtained in the presence of 15 Torr H-2 except that in this circumstance 1,3-cyclohexadiene coexists with 1,4- cyclohexadiene at 303 K, and with C6H9 at temperature higher than 403 K. This study reports, for the first time, the existence of pi-allyl c-C6H9 as a major surface species in the presence of high-pressure cyclohexene and H-2 on Pt(111). In addition, adsorbed 1,3-cyclohexadiene has been observed as a reactive intermediate in the process of dehydrogenation to benzene. Finally, it has been found that excess hydrogen increases the disordering and decreases the surface coverage of the C6H9 on the surface. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. NR 36 TC 36 Z9 36 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD JUN 5 PY 2003 VL 107 IS 22 BP 5267 EP 5272 DI 10.1021/jp034355r PG 6 WC Chemistry, Physical SC Chemistry GA 684TW UT WOS:000183223500022 ER PT J AU Martin, RM Galli, G AF Martin, RM Galli, G TI Condensed-matter physics - Hydrogen falls into line SO NATURE LA English DT Editorial Material ID SEMICONDUCTORS; IMPURITIES C1 Univ Illinois, Dept Phys, Urbana, IL 61801 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Martin, RM (reprint author), Univ Illinois, Dept Phys, 1110 W Green St, Urbana, IL 61801 USA. NR 8 TC 0 Z9 0 U1 0 U2 1 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD JUN 5 PY 2003 VL 423 IS 6940 BP 595 EP 596 DI 10.1038/423595a PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 686BT UT WOS:000183301200024 PM 12789322 ER PT J AU Cubukcu, E Aydin, K Ozbay, E Foteinopoulou, S Soukoulis, CM AF Cubukcu, E Aydin, K Ozbay, E Foteinopoulou, S Soukoulis, CM TI Negative refraction by photonic crystals SO NATURE LA English DT Article C1 Bilkent Univ, Dept Phys, TR-06533 Bilkent, Ankara, Turkey. Iowa State Univ, Ames Lab, US Dept Energy, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Univ Crete, Res Ctr Crete, Iraklion 71100, Crete, Greece. Univ Crete, Dept Mat Sci & Technol, Iraklion 71100, Crete, Greece. RP Cubukcu, E (reprint author), Bilkent Univ, Dept Phys, TR-06533 Bilkent, Ankara, Turkey. EM cubukcu@fen.bllkent.edu.tr RI Ozbay, Ekmel/B-9495-2008; Cubukcu, Ertugrul/F-4807-2010; Aydin, Koray/D-5100-2009; Aydin, Koray/G-2537-2011; Cubukcu, Ertugrul/D-5007-2012; Soukoulis, Costas/A-5295-2008 OI Aydin, Koray/0000-0002-3268-2216; NR 7 TC 505 Z9 532 U1 6 U2 77 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD JUN 5 PY 2003 VL 423 IS 6940 BP 604 EP 605 DI 10.1038/423604b PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 686BT UT WOS:000183301200029 PM 12789328 ER PT J AU Jeon, S Jalilian-Marian, J Sarcevic, I AF Jeon, S Jalilian-Marian, J Sarcevic, I TI The origin of large-p(T) pi(0) suppression at RHIC SO PHYSICS LETTERS B LA English DT Article ID HEAVY-ION COLLISIONS; QUARK-GLUON PLASMA; RADIATIVE ENERGY-LOSS; ULTRARELATIVISTIC ENERGIES; PARTON DISTRIBUTIONS; PROMPT PHOTONS; JET TOMOGRAPHY; LOW-X; NUCLEAR; FRAGMENTATION AB We present results for inclusive two production in proton-proton and in Au-Au at RHIC energy rootS = 200 GeV. We use next-to-leading order perturbative QCD calculation and we include nuclear effects such as parton energy loss and nuclear shadowing. We consider the ratio of pi(0) distribution in Au-Au and p-p collisions for PT > 3 GeV for three cases of parton energy loss: (1) constant parton energy loss per parton scattering, is an element of(n)(a) = const, (2) Landau-Pomeranchuk-Migdal energy-dependent energy n loss, is an element of(n)(a) similar to rootE(n)(a) and (3) Bethe-Heitler energy-dependent energy loss, is an element of(n)(a) similar to is an element of(n)(a). We show that recently observed suppression of pi(0) production in Au-Au collisions at RHIC, which is found to increase with PT increasing from 3 GeV to 8 GeV, can be reproduced by is an element of(n)(a) = 0.06E(n)(a). We show that the ratio of prompt photons to neutral pions produced in Au-Au collisions at RHIC has a strong PT dependence approaching one at PT - 10 GeV. (C) 2003 Published by Elsevier Science B.V. C1 RIKEN BNL Res Ctr, Upton, NY 11973 USA. McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. RP Jeon, S (reprint author), RIKEN BNL Res Ctr, Upton, NY 11973 USA. NR 35 TC 44 Z9 46 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JUN 5 PY 2003 VL 562 IS 1-2 BP 45 EP 50 DI 10.1016/S0370-2693(03)00536-7 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 685JW UT WOS:000183260500006 ER PT J AU Zuppiroli, L Bieber, A Michoud, D Galli, G Gygi, F Bussac, MN Andre, JJ AF Zuppiroli, L Bieber, A Michoud, D Galli, G Gygi, F Bussac, MN Andre, JJ TI Polaron formation and symmetry breaking SO CHEMICAL PHYSICS LETTERS LA English DT Article ID DENSITY-FUNCTIONAL THEORY; CONJUGATED POLYMERS; POLY(PARA-PHENYLENE VINYLENE); THEORETICAL CHARACTERIZATION; PHENYLENEVINYLENE OLIGOMERS; OPTICAL-TRANSITIONS; TRANS-STILBENE; CHAIN-LENGTH; OLIGOTHIOPHENES; CARRIER AB In a molecular semiconductor, a charged molecule experiences a lattice relaxation which reorganizes it into a cation or an anion-radical. This species is not, in general, a polaron. By using calculations of the geometry and the electronic structure both ab initio and at the semi-empirical levels, we have explored the conditions of polaron formation in a molecular model system: oligophenylene-vinylenes, PVs of increasing sizes. The symmetry breaking occurs at sizes larger than five monomers for the anion and six monomers for the cation. The driving force for this process is primarily the charge-lattice coupling through the stretching mode at 1600 cm(-1). (C) 2003 Elsevier Science B.V. All rights reserved. C1 Ecole Polytech Fed Lausanne, Inst Mat, Lab Optoelect Mat Mol, CH-1015 Lausanne, Switzerland. CNRS, UPR 22, Inst Charles Sadron, F-67043 Strasbourg, France. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Ecole Polytech, Ctr Phys Theor, F-91128 Palaiseau, France. RP Zuppiroli, L (reprint author), Ecole Polytech Fed Lausanne, Inst Mat, Lab Optoelect Mat Mol, CH-1015 Lausanne, Switzerland. NR 29 TC 17 Z9 17 U1 0 U2 9 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 JUN 4 PY 2003 VL 374 IS 1-2 BP 7 EP 12 DI 10.1016/S0009-2614(03)00646-8 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 691FP UT WOS:000183595600002 ER PT J AU Wang, XB Dacres, JE Yang, X Lis, L Bedell, VM Wang, LS Kass, SR AF Wang, XB Dacres, JE Yang, X Lis, L Bedell, VM Wang, LS Kass, SR TI Photodetachment of zwitterions: Probing intramolecular Coulomb repulsion and attraction in the gas phase using mono-decarboxylated pyridinium dicarboxylates. Implications on the mechanism of orotidine 5 '-monophosphate decarboxylase SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID TRANSITION-STATE ANALOG; MULTIPLY-CHARGED ANIONS; ENZYME ACTIVE-SITE; PROFICIENT ENZYME; OROTIDINE-5'-PHOSPHATE DECARBOXYLASE; MONOPHOSPHATE DECARBOXYLASE; 5'-PHOSPHATE DECARBOXYLASE; 1,3-DIMETHYLOROTIC ACID; OMP DECARBOXYLASE; PHOTOELECTRON-SPECTROSCOPY AB Negative ion photoelectron spectra resulting from the decarboxylation of nine zwitterionic pyridinium dicarboxylates (D(x,y)) are reported. Structural assignments are made on the basis of analogy to the spectra of related species, labeling experiments with C-13- or H-2-containing substrates, independent syntheses, and comparison to density functional theory and ab initio (B3LYP and CCSD(T), respectively) results. In some cases, an acid-catalyzed isomerization of the D(xy)-CO2 ions was found to take place. Adiabatic detachment energies of the resulting zwitterionic ions were measured and are well reproduced by theory. The relative stabilities of the D(x,Y)-CO2 decarboxylation products are largely determined by their intramolecular electrostatic interactions, which are directly probed by the photoelectron spectra and were analyzed in terms of the resulting Coulombic forces. Expulsion of carbon dioxide from the D(x,y) ions was also used as an electrostatic model to probe the mechanism of the enzyme-catalyzed conversion of orotidine 5'-monophosphate (OMP) to uridine 5'-monophosphate (UMP). It was found that the loss of CO2 from these zwitterions; and from oxygen-protonated OMP is retarded by the presence of an additional anionic group. This suggests that the formation of a zwitterion intermediate in the enzyme-catalyzed transformation of OMP to UMP may have less of an energetic impact than commonly thought and could be a "red herring". If so, the electrostatic stress mechanism proposed by Larsen et al. and Pai, Guo, and co-workers maybe followed. C1 Washington State Univ, Dept Phys, Richland, WA 99352 USA. Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA. RP Kass, SR (reprint author), Washington State Univ, Dept Phys, 2710 Univ Dr, Richland, WA 99352 USA. NR 75 TC 11 Z9 11 U1 0 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD JUN 4 PY 2003 VL 125 IS 22 BP 6814 EP 6826 DI 10.1021/ja0290835 PG 13 WC Chemistry, Multidisciplinary SC Chemistry GA 686GX UT WOS:000183314000047 PM 12769593 ER PT J AU Zhu, GY Zhai, P He, XY Terzyan, S Zhang, RG Joachimiak, A Tang, J Zhang, XJC AF Zhu, GY Zhai, P He, XY Terzyan, S Zhang, RG Joachimiak, A Tang, J Zhang, XJC TI Crystal structure of the human GGA1 GAT domain SO BIOCHEMISTRY LA English DT Article ID ADP-RIBOSYLATION FACTOR; GTPASE-ACTIVATING PROTEIN; GUANINE-NUCLEOTIDE; GOLGI MEMBRANES; GAMMA-ADAPTIN; VHS DOMAINS; BINDING-PROTEIN; CHOLERA-TOXIN; ARF PROTEINS; TRANS-GOLGI AB GGAs are a family of vesicle-coating regulatory proteins that function in intracellular protein transport. A GGA molecule contains four domains, each mediating interaction with other proteins in carrying out intracellular transport. The GAT domain of GGAs has been identified as the structural entity that binds membrane-bound ARF, a molecular switch regulating vesicle-coat assembly. It also directly interacts with rabaptin5, an essential component of endosome fusion. A 2.8 Angstrom resolution crystal structure of the human GGA1 GAT domain is reported here. The GAT domain contains four helices and has an elongated shape with the longest dimension exceeding 80 Angstrom. Its longest helix is involved in two structural motifs: an N-terminal helix-loop-helix motif and a C-terminal three-helix bundle. The N-terminal motif harbors the most conservative amino acid sequence in the GGA GAT domains. Within this conserved region, a cluster of residues previously implicated in ARF binding forms a hydrophobic surface patch, which is likely to be the ARF-binding site. In addition, a structure-based mutagenesis-biochemical analysis demonstrates that the C-terminal three-helix bundle of this GAT domain is responsible for the rabaptin5 binding. These structural characteristics are consistent with a model supporting multiple functional roles for the GAT domain. C1 Oklahoma Med Res Fdn, Crystallog Res Program, Oklahoma City, OK 73104 USA. Oklahoma Med Res Fdn, Prot Studies Program, Oklahoma City, OK 73104 USA. Argonne Natl Lab, Struct Biol Ctr, Adv Photon Source, Argonne, IL 60439 USA. Univ Oklahoma, Med Ctr, Dept Biochem & Mol Biol, Oklahoma City, OK 73104 USA. RP Zhang, XJC (reprint author), Oklahoma Med Res Fdn, Crystallog Res Program, 825 NE 13th St, Oklahoma City, OK 73104 USA. RI Zhu, Guangyu/F-6279-2011 OI Zhu, Guangyu/0000-0003-4228-135X FU NHLBI NIH HHS [HL60626]; NIA NIH HHS [AG-18933] NR 47 TC 29 Z9 30 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JUN 3 PY 2003 VL 42 IS 21 BP 6392 EP 6399 DI 10.1021/bi034334n PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 684MJ UT WOS:000183210900008 PM 12767220 ER PT J AU Muller, FL Roberts, AG Bowman, MK Kramer, DM AF Muller, FL Roberts, AG Bowman, MK Kramer, DM TI Architecture of the Q(o) site of the cytochrome bc(1) complex probed by superoxide production SO BIOCHEMISTRY LA English DT Article ID IRON-SULFUR PROTEIN; MITOCHONDRIAL RESPIRATORY-CHAIN; PROTONMOTIVE Q-CYCLE; ELECTRON-TRANSFER; UBIQUINOL OXIDATION; ENERGY TRANSDUCTION; MISSENSE MUTATION; DOMAIN MOVEMENT; B GENE; INHIBITORS AB Although several X-ray structures have been determined for the mitochondrial cytochrome (cyt) bc(1) complex, none yet shows the position of the substrate, ubiquinol, in the quinol oxidase (Q(o)) site. In this study, the interaction of molecular oxygen with the reactive intermediate Q(o) semiquinone is used to probe the Q(o) site. It has been known for some time that partial turnover of the cyt bc(1) complex in the presence of antimycin A, a Q(i) site inhibitor, results in accumulation of a semiquinone at the Q(o) site, which can reduce O-2 to superoxide (O-2(.-)). It was more recently shown that myxothiazol, which binds close to the cyt b(L) heme in the proximal Q(o) niche, also induces O-2(.-) production. In this work, it is shown that, in addition to myxothiazol, a number of other proximal Q(o) inhibitors [including (E)-beta-methoxyacrylate-stilbene, mucidin, and famoxadone] also induce O-2(.-) production in the isolated yeast cyt bc(1) complex, at similar to50% of the V-max observed in the presence of antimycin A. It is proposed that proximal Q(o) site inhibitors induce O-2(.-) production because they allow formation, but not oxidation, of the semiquinone at the distal niche of the Q(o) site pocket. The apparent K-m for ubiquinol at the Q(o) site in the presence of proximal Q(o) site inhibitors suggests that the "distal niche" of the Qo pocket can act as a fully independent quinol binding and oxidation site. Together with the X-ray structures, these results suggest substrate ubiquinol binds in a fashion similar to that of stigmatellin with H-bonds between H161 of the Rieske iron-sulfur protein and E272 of the cyt b protein. When modeled in this way, mucidin and ubiquinol can bind simultaneously to the Q(o) site with virtually no steric hindrance, whereas progressively bulkier inhibitors exhibit increasing overlap. The fact that partial turnover of the Q, site is possible even with bound proximal Q(o) site inhibitors is consistent with the participation of two separate functional Q(o) binding niches, occupied simultaneously or sequentially. C1 Washington State Univ, Inst Biol Chem, Pullman, WA 99164 USA. Pacific NW Natl Lab, WR Riley Environm Mol Sci Lab, Richland, WA 99352 USA. RP Kramer, DM (reprint author), Washington State Univ, Inst Biol Chem, 289 Clark Hall, Pullman, WA 99164 USA. RI Bowman, Michael/F-4265-2011 OI Bowman, Michael/0000-0003-3464-9409 FU NIGMS NIH HHS [GM61904] NR 46 TC 93 Z9 96 U1 2 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JUN 3 PY 2003 VL 42 IS 21 BP 6493 EP 6499 DI 10.1021/bi0342160 PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 684MJ UT WOS:000183210900020 PM 12767232 ER PT J AU Jha, P Bobev, S Subbanna, GN Ganguli, AK AF Jha, P Bobev, S Subbanna, GN Ganguli, AK TI Nd2Ba2CaZn2Ti3O14.4: A new high dielectric constant oxide having a disordered (cubic) perovskite structure SO CHEMISTRY OF MATERIALS LA English DT Article ID PHASES AB A new oxide of the formula Nd2Ba2CaZn2Ti3O14.4 has been successfully prepared by a high-temperature ceramic route at 1200 degreesC. The title compound crystallizes in a cubic structure with a = 3.94263(7) Angstrom (space group = Pm (3) over barm, wRp = 0.0305, Rp, = 0.0192) as obtained from Rietveld refinement of powder neutron diffraction data. X-ray and electron diffraction studies also confirm the absence of any ordering of the cations. The title compound has a high dielectric constant of 59 at 100 kHz and a very small frequency coefficient of the dielectric constant (depsilon/dF = 1.26 x 10(-6) Hz(-1)). The dielectric loss is 0.0047 at 100 kHz, which also shows very minor variation with frequency. The temperature-dependence studies show an increase in dielectric constant and dielectric loss over the temperature range 35-300 degreesC. C1 Indian Inst Technol, Dept Chem, New Delhi 110016, India. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Indian Inst Sci, Mat Res Ctr, Bangalore 560012, Karnataka, India. RP Ganguli, AK (reprint author), Indian Inst Technol, Dept Chem, New Delhi 110016, India. NR 18 TC 10 Z9 10 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD JUN 3 PY 2003 VL 15 IS 11 BP 2229 EP 2233 DI 10.1021/cm030043p PG 5 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 684VV UT WOS:000183228000020 ER PT J AU Chylek, P Henderson, B Mishchenko, M AF Chylek, P Henderson, B Mishchenko, M TI Satellite based retrieval of aerosol optical thickness: The effect of sun and satellite geometry SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID TROPOSPHERIC AEROSOL; CLIMATE; TARFOX; LAND; ATSR-2; OCEAN; POLARIZATION; ATMOSPHERES; REFLECTANCE; SCATTERING AB [1] The DOE research satellite instrument, the Multispectral Thermal Imager (MTI), has several spectral bands in the visible and near infrared part of the spectrum that can be used for AOD (Aerosol Optical Depth) retrieval. Small pixel size (5 m x 5 m in the visible and 20 m x 20 m in the infrared) eliminates most sub-pixel size cloud problems. We analyze 18 pairs of images, taken close to nadir and back along the track at a viewing angle around 60degrees, and compare results of a single view AOD retrieval algorithm with the AERONET measurements. We find that the single view AOD retrieval algorithm is more accurate at smaller scattering angles (at off-nadir view). The root mean square (RMS) error of the MTI AOD single view retrieval in this region is around 0.03 compared to 0.11 for larger scattering angles at near-nadir view. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NASA, Goddard Inst Space Studies, New York, NY 10025 USA. Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS, Canada. New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA. RP Los Alamos Natl Lab, Mail Stop D436, Los Alamos, NM 87545 USA. EM chylek@lanl.gov; henders@lanl.gov; crmim@giss.nasa.gov RI Mishchenko, Michael/D-4426-2012 NR 29 TC 13 Z9 13 U1 0 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 EI 1944-8007 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD JUN 3 PY 2003 VL 30 IS 11 AR 1553 DI 10.1029/2003GL016917 PG 4 WC Geosciences, Multidisciplinary SC Geology GA 690MW UT WOS:000183553800004 ER PT J AU Dai, PS Cebe, P Capel, M Alamo, RG Mandelkern, L AF Dai, PS Cebe, P Capel, M Alamo, RG Mandelkern, L TI In situ wide- and small-angle X-ray scattering study of melting kinetics of isotactic poly(propylene) SO MACROMOLECULES LA English DT Article ID MAGNETIC-RESONANCE; POLYPROPYLENE; CRYSTALLIZATION; MORPHOLOGY AB We describe a comparative study of long time isothermal melting kinetics of Ziegler-Natta catalyzed, and metallocene catalyzed, isotactic poly(propylenes). The role of the transverse lamellae in stabilizing the crystalline structures against melting is presented in light of the different molecular chain architecture and lamellar structure of these poly(propylenes). Both poly(propylenes) were first isothermally crystallized at 152 degreesC. Real time in-situ wide- and small-angle X-ray scattering (WAXS and SAXS) were used to study isothermal melting kinetics in a temperature region between melting of transverse and dominant (radial) lamellae, i.e., when most transverse lamellae are molten. Changes in WAYS crystalline peak height, SAXS invariant, and Bragg peak height with time all confirm that Ziegler-Natta iPP had slower melting kinetics than metallocene iPP. Melting kinetics is, apparently, unique to poly(propylene) as a consequence of a favorable nearly orthogonal epitaxial crystallization. What is observed is the instability of the dominant thicker lamellae due to the removal of the epitaxy. Both Ziegler-Natta and metallocene catalyzed polymers show a prolonged, gradual decay of crystallinity with time. Hence, melting kinetics is a general phenomenon observed in poly(propylenes) that crystallize preferentially in the alpha (monoclinic) modification. The crystallization conditions under which these iPPs exhibit melting kinetics are when crystallization occurs at relatively low undercooling, when the crystallites are not subject to reorganization. C1 Tufts Univ, Dept Phys & Astron, Medford, MA 02155 USA. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. Florida State Univ, Tallahassee, FL 32310 USA. Florida A&M Univ, Dept Chem Engn, Tallahassee, FL 32310 USA. Florida State Univ, Dept Chem & Biochem, Tallahassee, FL 32306 USA. RP Cebe, P (reprint author), Tufts Univ, Dept Phys & Astron, Medford, MA 02155 USA. NR 34 TC 16 Z9 16 U1 1 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD JUN 3 PY 2003 VL 36 IS 11 BP 4042 EP 4050 DI 10.1021/ma025987z PG 9 WC Polymer Science SC Polymer Science GA 685EK UT WOS:000183247700042 ER PT J AU Baker, KL AF Baker, KL TI Single-pass gain in a chirped quasi-phase-matched optical parametric oscillator SO APPLIED PHYSICS LETTERS LA English DT Article ID POLED LITHIUM-NIOBATE AB In this letter, the single-pass gain of a quasi-phase-matched optical parametric oscillator with chirped poling is calculated. Specifically, the single-pass gain from optical parametric oscillators containing a z(n) chirped profile of their periodically poled grating wavelength is derived. Using the calculated gain, the parametric oscillator threshold is determined. Both the gain and threshold condition for a chirped device contain an increased power scaling in the pump intensity over a uniformly poled device due to the pump power dependence in the interaction length. The chirped poling structure exhibits a lower gain, a higher threshold, and a larger bandwidth at threshold than uniformly chirped devices with the same overall crystal length. (C) 2003 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Baker, KL (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 11 TC 6 Z9 6 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUN 2 PY 2003 VL 82 IS 22 BP 3841 EP 3843 DI 10.1063/1.1579848 PG 3 WC Physics, Applied SC Physics GA 683AH UT WOS:000183124200011 ER PT J AU Yang, WG Larson, BC Ice, GE Tischler, JZ Budai, JD Chung, KS Lowe, WP AF Yang, WG Larson, BC Ice, GE Tischler, JZ Budai, JD Chung, KS Lowe, WP TI Spatially resolved Poisson strain and anticlastic curvature measurements in Si under large deflection bending SO APPLIED PHYSICS LETTERS LA English DT Article ID PLATE; BEAMS AB A scanning-monochromatic form of differential-aperture x-ray microscopy (DAXM) has been developed that provides micron-resolution depth-resolved dilatational strain measurements. This scanning-monochromatic DAXM technique is applied to measurements of Poisson dilatational strain in 25-mum-thick Si bent into an arch with an apex radius of R=3 mm. Poisson strain measurements agree with anisotropic linear elasticity calculations for a Searle parameter as large as beta=1009. Local anticlastic bend radii were shown to oscillate across the arch and reach the R/nu limit for distances less than the plate thickness from the edges, where nu is the anisotropic Poisson's ratio. (C) 2003 American Institute of Physics. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Howard Univ, Washington, DC 20059 USA. RP Yang, WG (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Yang, Wenge/H-2740-2012; Budai, John/R-9276-2016 OI Budai, John/0000-0002-7444-1306 NR 19 TC 32 Z9 32 U1 1 U2 9 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUN 2 PY 2003 VL 82 IS 22 BP 3856 EP 3858 DI 10.1063/1.1579857 PG 3 WC Physics, Applied SC Physics GA 683AH UT WOS:000183124200016 ER PT J AU Francoeur, S Seong, MJ Mascarenhas, A Tixier, S Adamcyk, M Tiedje, T AF Francoeur, S Seong, MJ Mascarenhas, A Tixier, S Adamcyk, M Tiedje, T TI Band gap of GaAs1-xBix, 0 < x < 3.6% SO APPLIED PHYSICS LETTERS LA English DT Article ID VAPOR-PHASE EPITAXY; GAASN ALLOYS; SEMICONDUCTORS; TRAPS AB The band gap of GaAsBi epitaxial layers as a function of bismuth concentration up to 3.6% is determined. The optical transitions were measured by modulated electroreflectance. The energy of the band gap decreases at a linearized rate of 88 meV/% Bi, or 83 meV/% Bi for the heavy hole to conduction band transition for GaAsBi strained to GaAs. The valence-band splitting increases faster than that of GaAs under similar compressive strain whereas the temperature dependence of the observed GaAsBi transitions is similar to that of GaAs. (C) 2003 American Institute of Physics. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Univ British Columbia, Dept Phys, AMPEL, Vancouver, BC V6T 1Z4, Canada. RP Francoeur, S (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. RI Francoeur, Sebastien/E-6614-2011 OI Francoeur, Sebastien/0000-0002-6129-7026 NR 16 TC 234 Z9 235 U1 4 U2 56 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 JUN 2 PY 2003 VL 82 IS 22 BP 3874 EP 3876 DI 10.1063/1.1581983 PG 3 WC Physics, Applied SC Physics GA 683AH UT WOS:000183124200022 ER PT J AU Luo, B Ren, F Fitch, RC Gillespie, JK Jenkins, T Sewell, J Via, D Crespo, A Baca, AG Briggs, RD Gotthold, D Birkhahn, R Peres, B Pearton, SJ AF Luo, B Ren, F Fitch, RC Gillespie, JK Jenkins, T Sewell, J Via, D Crespo, A Baca, AG Briggs, RD Gotthold, D Birkhahn, R Peres, B Pearton, SJ TI Improved morphology for ohmic contacts to AlGaN/GaN high electron mobility transistors using WSix- or W-based metallization SO APPLIED PHYSICS LETTERS LA English DT Article ID N-TYPE GAN; RESISTANCE; TI/AL; HETEROSTRUCTURES; MICROSTRUCTURE; IMPLANTATION; TEMPERATURE; RESISTIVITY AB A comparison was made of specific contact resistivity and morphology of Ti/Al/Pt/WSi/Ti/Au and Ti/Al/Pt/W/Ti/Au ohmic contacts to AlGaN/GaN heterostructures relative to the standard Ti/Al/Pt/ Au metallization. The W- and WSi-based contacts show comparable specific resistivities to that of the standard contact on similar layer structures, reaching minimum values of similar to10(-5) Omega cm(2) after annealing in the range 850 - 900 degreesC. However, the W- and WSi-based contacts exhibit much smoother surface morphologies, even after 950 degreesC annealing. For example, the root-mean-square roughness of the Ti/Al/Pt/ WSi/Ti/Au contact annealed at 950 degreesC was unchanged from the as-deposited values whereas the Ti/Al/Pt/ Au contact shows significant deterioration of the morphology under these conditions. The improved thermal stability of the W- and WSix-based contacts is important for maintaining edge acuity during high-temperature operation. (C) 2003 American Institute of Physics. C1 Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA. USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. EMCORE Corp, Somerset, NJ 08873 USA. Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA. RP Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA. EM spear@mse.ufl.edu RI Gotthold, David/D-1086-2011 OI Gotthold, David/0000-0002-3990-6614 NR 29 TC 31 Z9 32 U1 0 U2 7 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0003-6951 EI 1077-3118 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUN 2 PY 2003 VL 82 IS 22 BP 3910 EP 3912 DI 10.1063/1.1579845 PG 3 WC Physics, Applied SC Physics GA 683AH UT WOS:000183124200034 ER PT J AU Morimoto, T Iwase, Y Aoki, N Sasaki, T Ochiai, Y Shailos, A Bird, JP Lilly, MP Reno, JL Simmons, JA AF Morimoto, T Iwase, Y Aoki, N Sasaki, T Ochiai, Y Shailos, A Bird, JP Lilly, MP Reno, JL Simmons, JA TI Nonlocal resonant interaction between coupled quantum wires SO APPLIED PHYSICS LETTERS LA English DT Article ID DIMENSIONAL ELECTRON-GAS; QUANTIZED CONDUCTANCE; DEPENDENT TRANSPORT; SPIN POLARIZATION; POINT CONTACTS; DOT ARRAYS; DENSITY AB We study the transport in a system of coupled quantum wires and show evidence for a resonant interaction that occurs whenever one of them is biased close to pinch off. Measuring the conductance of one of the wires, as the width of the other is varied, we observe a resonant peak in the conductance that is correlated to the point at which the other wire pinches off. The origin of this interaction remains undetermined at present, although its characteristics appear consistent with predictions that a correlated many-body state should form in narrow wires as their conductance vanishes. (C) 2003 American Institute of Physics. C1 Chiba Univ, Dept Mat Technol, Inage Ku, Chiba 2638522, Japan. Chiba Univ, Ctr Frontier Elect & Photon, Inage Ku, Chiba 2638522, Japan. Arizona State Univ, Dept Elect Engn, Nanostruct Res Grp, Tempe, AZ 85287 USA. Sandia Natl Labs, Nanostruct & Semicond Phys Dept, Nanoelect Grp, Albuquerque, NM 87185 USA. RP Morimoto, T (reprint author), Chiba Univ, Dept Mat Technol, Inage Ku, 1-33 Yayoi, Chiba 2638522, Japan. RI Bird, Jonathan/G-4068-2010 OI Bird, Jonathan/0000-0002-6966-9007 NR 14 TC 45 Z9 46 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUN 2 PY 2003 VL 82 IS 22 BP 3952 EP 3954 DI 10.1063/1.1579851 PG 3 WC Physics, Applied SC Physics GA 683AH UT WOS:000183124200048 ER PT J AU Lemma, K Ellern, A Bakac, A AF Lemma, K Ellern, A Bakac, A TI H-1 NMR studies of ligand and H/D exchange reactions of cis- and trans-([14]aneN(4))(H2O)RhH2+ in aqueous solutions SO INORGANIC CHEMISTRY LA English DT Article ID TRANSITION-METAL HYDRIDES; HYDROGEN-DEUTERIUM EXCHANGE; ATOM TRANSFER-REACTIONS; ORGANOMETALLIC CHEMISTRY; CRYSTAL-STRUCTURE; MOLECULAR-STRUCTURE; RHODIUM HYDRIDES; ION-PAIRS; X-RAY; COMPLEXES AB Substitution and exchange reactions of cis- and trans-L-1(H2O)RhH2+ (L-1 = 1,4,8,11-tetraazacyclotetradecane = [14]aneN(4)) were studied in aqueous solutions by UV-vis and H-1 NMR spectroscopies. At pH 1 and 25 degreesC, the substitution of SCN- for the coordinated molecule of water is rapid and thermodynamically favorable. Spectrophotometric determinations yielded the equilibrium constants K = 1.49 x 10(3) M-1 (cis) and 1.44 x 10(3) (trans). H-1 NMR studies in D2O revealed a rapid dynamic process, interpreted as the exchange between coordinated water and X- (X = Cl, Br, or l). On the other hand, no line broadening was observed for the strongly bound ligands CN- and SCN-. The complex trans-L-1(D2O)RhH2+ undergoes a base-catalyzed H/D exchange of the hydride in D2O with a rate constant of (1.45 +/- 0.02) x 10(3) M-1 s(-1). The exchange in the cis isomer is very slow under similar conditions. The complex cis-[(LClRhH)-Cl-1](ClO4) crystallizes in the centrosymmetric P (1) over bar space group, unit cell dimensions a = 8.9805(11) Angstrom, b = 9.1598(11) Angstrom, c = 10.4081(13) Angstrom, alpha = 81.091(2)degrees, beta = 81.978(2)degrees, gamma = 88.850(2)degrees. The rhodium atom resides in a slightly distorted octahedral environment consisting of the four N atoms of the cyclam, a wstereochemically active hydrogen, and a chlorine atom. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. RP Bakac, A (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM bakac@ameslab.gov NR 51 TC 14 Z9 14 U1 0 U2 3 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 JUN 2 PY 2003 VL 42 IS 11 BP 3662 EP 3669 DI 10.1021/ic0341310v PG 8 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 684TF UT WOS:000183222100039 PM 12767206 ER PT J AU Rao, LF Garnov, AY Jiang, J Di Bernardo, P Zanonato, P Bismondo, A AF Rao, LF Garnov, AY Jiang, J Di Bernardo, P Zanonato, P Bismondo, A TI Complexation of uranium(VI) and samarium(III) with oxydiacetic acid: Temperature effect and coordination modes SO INORGANIC CHEMISTRY LA English DT Article ID ACETATE; NEODYMIUM AB The complexation of uranium(VI) and samarium(III) with oxydiacetate (ODA) in 1.05 mol kg(-1) NaClO4 is studied at variable temperatures (25-70 degreesC). Three U(VI)/ODA complexes (UO2L, UO2L22-, and UO2HL2-) and three Sm(III)/ ODA complexes (SmLj(3-2j)+ with j = 1, 2, 3) are identified in this temperature range. The formation constants and the molar enthalpies of complexation are determined by potentiometry and calorimetry. The complexation of uranium(VI) and samarium(111) with oxydiacetate becomes more endothermic at higher temperatures. However, the complexes become stronger due to increasingly more positive entropy of complexation at higher temperatures that exceeds the increase in the enthalpy of complexation. The values of the heat capacity of complexation (DeltaC(p)degrees in J K-1 mol(-1)) are 95 +/- 6, 297 +/- 14, and 162 +/- 19 for UO2L, UO2L22-, and UO2HL2-, and 142 +/- 6, 198 +/- 14, and 157 +/- 19 for SmL+, SmL2-, and SmL33-, respectively. The thermodynamic parameters, in conjunction with the structural information from spectroscopy, help to identify the coordination modes in the uranium oxydiacetate complexes. The effect of temperature on the thermodynamics of the complexation is discussed in terms of the electrostatic model and the change in the solvent structure. C1 Lawrence Berkeley Lab, Glenn T Seaborg Ctr, Berkeley, CA 94720 USA. Univ Padua, Dipartimento Chim Inorgan Met & Anal, I-35131 Padua, Italy. CNR, Ist Chim Inorgan Superfici, I-35127 Padua, Italy. RP Rao, LF (reprint author), Lawrence Berkeley Lab, Glenn T Seaborg Ctr, Berkeley, CA 94720 USA. NR 28 TC 31 Z9 32 U1 3 U2 11 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 JUN 2 PY 2003 VL 42 IS 11 BP 3685 EP 3692 DI 10.1021/ic034227h PG 8 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 684TF UT WOS:000183222100042 PM 12767209 ER PT J AU Pestovsky, O Bakac, A AF Pestovsky, O Bakac, A TI Superoxometal-catalyzed co-oxidation of alcohols and nitrous acid with molecular oxygen SO JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL LA English DT Article DE superoxochromium; oxidation; nitrous acid; nitric oxide; chromium(IV) ID COMPLEXES; KINETICS; ION AB A superoxochromium(III) ion, CraqOO2+, acts as a catalyst for the co-oxidation of alcohols and nitrous acid with molecular oxygen according to the stoichiometry: CH3OH + HNO2 + O-2 --> CH2O + NO3- + H2O + H+. The kinetics are second order in [HNO2] and independent of the concentrations of the superoxochromium catalyst, substrate, and O-2. The proposed mechanism features the disproportionation of HNO2 to NO and NO2, both of which react rapidly with CraqOO2+. The CraqOO2+/NO reaction generates another equivalent of NO2 and a mole of CraqO2+, the active oxidant. The two-electron oxidation of the alcohol by CraqO2+ produces Cr-aq(2+), which reacts rapidly with O-2 to regenerate the catalyst, CraqOO2+. The NO2/CraqOO2+ reaction yields the peroxynitrato complex, CraqOONO22+' in a dead-end equilibrium process that has no effect on the catalytic reaction. The disproportionation of NO2 yields the final nitrogen-containing product, NO3-, and regenerates an equivalent of HNO2. Under a fixed set of conditions, the relative catalytic efficiency (CE) of CraqOO2+ decreases as its concentration increases owing to the competition between O-2 and CraqOO2+ for the intermediate Craq (C) 2003 Elsevier Science B.V. All rights reserved. C1 Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. RP Bakac, A (reprint author), Iowa State Univ Sci & Technol, Ames Lab, 29 Spedding, Ames, IA 50011 USA. NR 12 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1381-1169 J9 J MOL CATAL A-CHEM JI J. Mol. Catal. A-Chem. PD JUN 2 PY 2003 VL 200 IS 1-2 BP 21 EP 29 DI 10.1016/S1381-1169(03)00045-1 PG 9 WC Chemistry, Physical SC Chemistry GA 683UK UT WOS:000183168200002 ER PT J AU Bouh, AO Espenson, JH AF Bouh, AO Espenson, JH TI Epoxidation reactions with urea-hydrogen peroxide catalyzed by methyltrioxorhenium(VII) on niobia SO JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL LA English DT Article DE epoxidation; methyltrioxorhenium; MTO; UHP; niobia; supported catalyst; soybean oil ID MAIN-GROUP ELEMENTS; METHYLRHENIUM TRIOXIDE; TRANSITION-METALS; MULTIPLE BONDS; OLEFINS; OXIDATION; KINETICS; PYRIDINE; RHENIUM AB Soybean oils (oleic, linoleic, and linolenic acids and their methyl esters) are epoxidized readily with urea-hydrogen peroxide (UHP) when methyltrioxorhenium(VII) supported on niobia. is used as the catalyst in chloroform. Simple alkenes are epoxidized by the same method. The epoxide and not a diol is produced. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Iowa State Univ Sci & Technol, Ames Lab, Dept Chem, Ames, IA 50011 USA. RP Espenson, JH (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Dept Chem, Ames, IA 50011 USA. NR 25 TC 36 Z9 38 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1381-1169 J9 J MOL CATAL A-CHEM JI J. Mol. Catal. A-Chem. PD JUN 2 PY 2003 VL 200 IS 1-2 BP 43 EP 47 DI 10.1016/S1381-1169(03)00097-9 PG 5 WC Chemistry, Physical SC Chemistry GA 683UK UT WOS:000183168200004 ER PT J AU Aroua, S Navratil, P Zamick, L Fayache, MS Barrett, BR Vary, JP Heyde, K AF Aroua, S Navratil, P Zamick, L Fayache, MS Barrett, BR Vary, JP Heyde, K TI Allowed Gamow-Teller excitations from the ground state of N-14 SO NUCLEAR PHYSICS A LA English DT Article ID CORE SHELL-MODEL; TENSOR INTERACTIONS; LIGHT-NUCLEI; SPIN-ORBIT; SYSTEM; RATES; O-16; C-12 AB Motivated by the proposed experiment N-14(d, He-2)C-14, we study the final states which can be reached via the allowed Gamow-Teller mechanism. Much emphasis has been given in the past to the fact that the transition matrix element from the J(pi) = 1(+), T = 0 ground State of N-14 to the J(pi) = 0(+), T = 1 ground state of 14C is very close to zero, despite the fact that all the quantum numbers are right for an allowed transition. We discuss this problem, but, in particular, focus on the excitations to final states with angular momenta 1(+) and 2(+). We note that the summed strength to the J(pi) = 2(+), T = 1 states, calculated with a wide variety of interactions, is significantly larger than that to the J(pi) = 1(+), T = 1 final states. We investigate the relative influences of the two-particle spin-orbit and tensor forces. (C) 2003 Published by Elsevier Science B.V. C1 Univ Tunis El Manar, Dept Phys, Fac Sci Tunis, Tunis 1060, Tunisia. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08855 USA. Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. State Univ Ghent, Vakgroep Subatomaire Stralingsfys, B-9000 Ghent, Belgium. RP Fayache, MS (reprint author), Univ Tunis El Manar, Dept Phys, Fac Sci Tunis, Tunis 1060, Tunisia. NR 44 TC 14 Z9 14 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD JUN 2 PY 2003 VL 720 IS 1-2 BP 71 EP 83 DI 10.1016/S0375-9474(03)00746-2 PG 13 WC Physics, Nuclear SC Physics GA 672PT UT WOS:000182530100005 ER PT J AU Li, XYS Demmel, JW AF Li, XYS Demmel, JW TI SuperLU_DIST: A scalable distributed-memory sparse direct solver for unsymmetric linear systems SO ACM TRANSACTIONS ON MATHEMATICAL SOFTWARE LA English DT Article DE algorithms; performance; sparse direct solver; supernodal factorization; parallelism; distributed-memory computers; scalability ID LU FACTORIZATION; GAUSSIAN-ELIMINATION; ALGORITHM; MATRICES; MULTIPROCESSORS; PERFORMANCE; DESIGN AB We present the main algorithmic features in the software package SuperLU_DIST, a distributed-memory sparse direct solver for large sets of linear equations. We give in detail our parallelization strategies, with a focus on scalability issues, and demonstrate the software's parallel performance and scalability on current machines. The solver is based on sparse Gaussian elimination, with an innovative static pivoting strategy proposed earlier by the authors. The main advantage of static pivoting over classical partial pivoting is that it permits a priori determination of data structures and communication patterns, which lets us exploit techniques used in parallel sparse Cholesky algorithms to better parallelize both LU decomposition and triangular solution on large-scale distributed machines. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Li, XYS (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, MS 50F-1650,1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 58 TC 216 Z9 222 U1 1 U2 4 PU ASSOC COMPUTING MACHINERY PI NEW YORK PA 1515 BROADWAY, NEW YORK, NY 10036 USA SN 0098-3500 J9 ACM T MATH SOFTWARE JI ACM Trans. Math. Softw. PD JUN PY 2003 VL 29 IS 2 BP 110 EP 140 DI 10.1145/779359.779361 PG 31 WC Computer Science, Software Engineering; Mathematics, Applied SC Computer Science; Mathematics GA 689QM UT WOS:000183504500002 ER PT J AU McLerran, L AF McLerran, L TI The search for universality: Small x and the color glass condensate SO ACTA PHYSICA POLONICA B LA English DT Article ID GLUON DISTRIBUTION-FUNCTIONS; DUAL PARTON MODEL; NUCLEAR COLLISIONS; POMERANCHUK SINGULARITY; TRANSVERSE-MOMENTUM; QCD; SATURATION; DISTRIBUTIONS; EVOLUTION; REGION AB I describe the search for universal properties of strongly interacting matter. The Color Glass Condensate is presented as the universal form of matter from which controls the high energy limit of strong interactions. At high energies, this strongly interacting but weakly coupled matter allows first computations from first principles in QCD. C1 Brookhaven Natl Lab, Nucl Theory Grp, Upton, NY 11793 USA. RP McLerran, L (reprint author), Brookhaven Natl Lab, Nucl Theory Grp, Upton, NY 11793 USA. NR 38 TC 4 Z9 4 U1 0 U2 0 PU ACTA PHYSICA POLONICA B, JAGELLONIAN UNIV, INST PHYSICS PI KRAKOW PA REYMONTA 4, 30-059 KRAKOW, POLAND SN 0587-4254 J9 ACTA PHYS POL B JI Acta Phys. Pol. B PD JUN PY 2003 VL 34 IS 6 BP 3029 EP 3041 PG 13 WC Physics, Multidisciplinary SC Physics GA 691ZF UT WOS:000183635300009 ER PT J AU Yang, ZGG Stevenson, JW Singh, P AF Yang, ZGG Stevenson, JW Singh, P TI Solid oxide fuel cells SO ADVANCED MATERIALS & PROCESSES LA English DT Article AB Materials for the bipolar plates of solid oxide fuel cells are under development to reduce costs while maintaining performance and durability. C1 Pacific NW Natl Lab, Div Sci Mat, Richland, WA 99352 USA. RP Yang, ZGG (reprint author), Pacific NW Natl Lab, Div Sci Mat, 902 Battelle Blvd, Richland, WA 99352 USA. RI Singh, Prabhakar/M-3186-2013 NR 0 TC 12 Z9 12 U1 1 U2 4 PU ASM INTERNATIONAL PI MATERIALS PARK PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002 USA SN 0882-7958 J9 ADV MATER PROCESS JI Adv. Mater. Process. PD JUN PY 2003 VL 161 IS 6 BP 34 EP 37 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA 689RN UT WOS:000183506900003 ER PT J AU Chaiko, DJ Leyva, A Niyogi, S AF Chaiko, DJ Leyva, A Niyogi, S TI Nanocomposite manufacturing SO ADVANCED MATERIALS & PROCESSES LA English DT Article AB A method for the manufacture of nanocomposites based on a highly concentrated, intercalated, pelletized product has been developed that will reduce costs and improve properties. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Chaiko, DJ (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 0 TC 3 Z9 3 U1 0 U2 3 PU ASM INTERNATIONAL PI MATERIALS PARK PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002 USA SN 0882-7958 J9 ADV MATER PROCESS JI Adv. Mater. Process. PD JUN PY 2003 VL 161 IS 6 BP 44 EP 46 PG 3 WC Materials Science, Multidisciplinary SC Materials Science GA 689RN UT WOS:000183506900005 ER PT J AU Tranter, TJ Herbst, RS Todd, TA Olson, AL Eldredge, HB AF Tranter, TJ Herbst, RS Todd, TA Olson, AL Eldredge, HB TI Application of a second order kinetic model for the preliminary design of an adsorption bed system using ammonium molybdophosphate-polyacrylonitrile for the removal of Cs-137 from acidic nuclear waste solutions SO ADVANCES IN ENVIRONMENTAL RESEARCH LA English DT Article DE ammonium molybdophosphate; polyacrylonitrile; cesium-137; nuclear waste; fixed bed ID DIFFUSION AB Ammonium molybdophosphate (AMP) immobilized on polyacrylonitrile (PAN) is an engineered form of cesium selective sorbent material developed at the Czech Technical University in Prague. A form of a second order kinetic model is applied to experimental AMP-PAN breakthrough data. A system utilizing three fixed beds in series is described that allows for continuous nuclear waste processing at approximately 890 1/h. This process would yield a product stream that is below the NRC Class A low level waste limit for Cs-137, and would result in high activity waste volume reduction factors of approximately 2200 and 570 for liquid sodium bearing waste and dissolved calcine waste, respectively, which are currently stored at the Idaho National Engineering and Environmental Laboratory. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 BBWI Inc, Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. Univ Idaho, Dept Chem Engn, Idaho Falls, ID 83402 USA. RP Tranter, TJ (reprint author), BBWI Inc, Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RI Todd, Terry /O-4930-2016 OI Todd, Terry /0000-0003-1324-6950 NR 13 TC 6 Z9 6 U1 0 U2 3 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 1093-0191 J9 ADV ENVIRON RES JI Adv. Environ. Res. PD JUN PY 2003 VL 7 IS 4 BP 913 EP 923 AR PII S1093-0191(02)00086-2 DI 10.1016/S1093-0191(02)00086-2 PG 11 WC Engineering, Environmental; Engineering, Chemical SC Engineering GA 700WB UT WOS:000184133200013 ER PT J AU Tirumala, VR Caneba, GT Dar, Y Wang, HH Mancini, DC AF Tirumala, VR Caneba, GT Dar, Y Wang, HH Mancini, DC TI Nanoparticles from a controlled polymerization process SO ADVANCES IN POLYMER TECHNOLOGY LA English DT Article DE nanotechnology; phase separation; polystyrene; radical polymerization; SAXS ID X-RAY-SCATTERING; METHACRYLATE) MICELLES; POOR-SOLVENT; CHAIN; NANOSPHERES; TRANSITION; POLYMERS; COLLAPSE; STAR AB Free-radical retrograde precipitation polymerization process in the past has shown excellent control characteristics over reaction rate, molecular weight, and in the entrapment of live radicals for the generation of block copolymers. The same principle has now been extended to study the reaction confinement to a nanoscale region. Nanosized polymer particles have been reported to form from block copolymers, conventional precipitation polymerization methods, or through emulsion polymerization approaches. In this work, we present a new method of generating nanosized polymer particles by polymerizing the monomer in an environment that precipitates the polymer above the lower critical solution temperature. The nanoparticles have been characterized by both tapping-mode atomic force microscopy observations and in situ synchrotron time resolved small-angle X-ray scattering analysis. The results from both the techniques showed the formation of nanoparticles in the size range of 15-30 nm, directly from the polymerization process. (C) 2003 Wiley Periodicals, Inc. C1 Michigan Technol Univ, Dept Chem Engn, Houghton, MI 49931 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60349 USA. RP Caneba, GT (reprint author), Michigan Technol Univ, Dept Chem Engn, Houghton, MI 49931 USA. NR 37 TC 12 Z9 12 U1 1 U2 9 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0730-6679 J9 ADV POLYM TECH JI Adv. Polym. Technol. PD SUM PY 2003 VL 22 IS 2 BP 126 EP 136 DI 10.1002/adv.10043 PG 11 WC Engineering, Chemical; Polymer Science SC Engineering; Polymer Science GA 666ER UT WOS:000182164400005 ER PT J AU Wang, GJ Volkow, ND Fowler, JS Franceschi, D Wong, CT Pappas, NR Netusil, N Zhu, W Felder, C Ma, YM AF Wang, GJ Volkow, ND Fowler, JS Franceschi, D Wong, CT Pappas, NR Netusil, N Zhu, W Felder, C Ma, YM TI Alcohol intoxication induces greater reductions in brain metabolism in male than in female subjects SO ALCOHOLISM-CLINICAL AND EXPERIMENTAL RESEARCH LA English DT Article DE cerebral glucose metabolism; gender; ethanol; pharmacological challenge ID CEREBRAL GLUCOSE-METABOLISM; POSITRON-EMISSION-TOMOGRAPHY; GENDER-RELATED DIFFERENCES; SEX-DIFFERENCES; NUCLEUS-ACCUMBENS; GABA(A) RECEPTORS; MENSTRUAL-CYCLE; ETHANOL; WOMEN; DOPAMINE AB Background: The mechanisms underlying the gender differences in alcohol drinking behavior and alcohol's effects are poorly understood and may reflect gender differences in brain neurochemistry. Alcohol decreases glucose metabolism in the human brain in a pattern that is consistent with its facilitation of GABAergic neurotransmission. We compared the regional changes in brain glucose metabolism during alcohol intoxication between female and male subjects. Methods: Ten female and 10 male healthy controls were scanned with positron emission tomography and 2-deoxy-2[F-18]fluoro-D-glucose twice: 40 min after placebo (diet soda) or alcohol (0.75 g/kg mixed with diet soda). Results: Alcohol significantly and consistently decreased whole-brain metabolism. The magnitude of these changes was significantly larger in male (-25 +/- 6%) than in female (-14 +/- 11%; p < 0.005) subjects. Half of the female subjects had reductions in metabolism during intoxication that were significantly lower than those in male subjects. This blunted response in the female subjects was not due to differences in alcohol concentration in plasma, because these did not differ between the genders. In contrast, the self-reports for the perception of intoxication were significantly greater in female than in male subjects. The cognitive deterioration during alcohol intoxication, although not significant, tended to be worse in female subjects. Conclusions: This study shows a markedly blunted sensitivity to the effects of acute alcohol on brain glucose metabolism in female subjects that may reflect gender differences in alcohol's modulation of GABAergic neurotransmission. The greater behavioral effects of alcohol in female subjects despite the blunted metabolic responses could reflect other effects of alcohol, for which the regional metabolic signal may be hidden within the large decrements in metabolism that occur during alcohol intoxication. C1 Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. SUNY Stony Brook, Dept Radiol, Stony Brook, NY 11794 USA. SUNY Stony Brook, Dept Psychiat, Stony Brook, NY 11794 USA. SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA. RP Wang, GJ (reprint author), Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. FU NIAAA NIH HHS [1R01 AA09481-01] NR 53 TC 35 Z9 36 U1 0 U2 6 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0145-6008 J9 ALCOHOL CLIN EXP RES JI Alcoholism (NY) PD JUN PY 2003 VL 27 IS 6 BP 909 EP 917 DI 10.1097/01.ALC.0000071740.56375.BA PG 9 WC Substance Abuse SC Substance Abuse GA 692JK UT WOS:000183657800004 PM 12824811 ER PT J AU Mendell, MJ Naco, GM Wilcox, TG Sieber, WK AF Mendell, MJ Naco, GM Wilcox, TG Sieber, WK TI Environmental risk factors and work-related lower respiratory symptoms in 80 office buildings: An exploratory analysis of NIOSH data SO AMERICAN JOURNAL OF INDUSTRIAL MEDICINE LA English DT Article DE indoor environmental quality; indoor air quality; sick building syndrome; nonspecific symptoms; respiratory symptoms; respiratory disease; ventilation systems; building-related illness; asthma ID HYPERSENSITIVITY PNEUMONITIS; OUTBREAK; DAMPNESS; HEALTH; ASTHMA; DUST AB Background We evaluated relationships between lower respiratory symptoms and risk factors or microbiological contamination in office buildings. Methods The National Institute for Occupational Safety and Health collected data from 80 office buildings during standardized indoor environmental-health hazard evaluations. Present analyses included lower respiratory symptom-based outcome definitions and risk factors for potential microbiologic contamination. Multivariate logistic regression models for selected outcomes identified key risk factors. Results Adjusted odds ratios (95% confidence intervals) for "at least three of four work-related lower respiratory symptoms" were, for debris in ventilation air intake, 2.0 (1.0-3.9), and for poor drainage in air-conditioning drip pans, 2.6 (1.3-5.2). Adjusted associations with risk factors were consistently stronger for outcomes requiring both multiple symptoms and improvement away from work, and somewhat stronger among diagnosed asthmatics. Conclusions Moisture and debris in ventilation systems, possibly by supporting microbiologic growth, may increase adverse respiratory effects, particularly among asthmatics. Data from more representative buildings are needed to confirm these findings. Published 2003 Wiley-Liss, Inc. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Indoor Environm Dept, Environm Energy Technol Div, Berkeley, CA 94720 USA. US FDA, Off Field Programs, Ctr Food Safety & Appl Nutr, Rockville, MD USA. NIOSH, Div Surveillance Hazard Evaluat & Field Surveys, Cincinnati, OH USA. RP Mendell, MJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Indoor Environm Dept, Environm Energy Technol Div, 1 Cyclotron Rd,MS 90-3058, Berkeley, CA 94720 USA. NR 24 TC 25 Z9 26 U1 3 U2 5 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0271-3586 J9 AM J IND MED JI Am. J. Ind. Med. PD JUN PY 2003 VL 43 IS 6 BP 630 EP 641 DI 10.1002/ajim.10211 PG 12 WC Public, Environmental & Occupational Health SC Public, Environmental & Occupational Health GA 682GF UT WOS:000183082800008 PM 12768613 ER PT J AU Mentrup, D Luban, M AF Mentrup, D Luban, M TI Almost-periodic wave packets and wave packets of invariant shape SO AMERICAN JOURNAL OF PHYSICS LA English DT Article AB Wave packets of one-dimensional, single-particle quantum systems exhibit a rich diversity of dynamical behavior. We focus on confining potentials where the entire energy spectrum is discrete so that wave packets do not spread indefinitely with time and instead exhibit characteristics of almost-periodic functions. For the harmonic oscillator, for which all wave packets are necessarily strictly periodic, Senitzky has shown that is possible to construct an infinite class of normalized wave packets that maintain a fixed shape while oscillating sinusoidally with time. We present two alternate and instructive methods for deriving this result using coherent states and the displacement operator. (C) 2003 American Association of Physics Teachers. [DOI: 10.1119/1.1555872]. C1 Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Mentrup, D (reprint author), Univ Osnabruck, Fachbereich Phys, Barbarastr 7, D-49069 Osnabruck, Germany. NR 11 TC 2 Z9 2 U1 0 U2 1 PU AMER ASSOC PHYSICS TEACHERS AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0002-9505 J9 AM J PHYS JI Am. J. Phys. PD JUN PY 2003 VL 71 IS 6 BP 580 EP 584 DI 10.1119/1.1555872 PG 5 WC Education, Scientific Disciplines; Physics, Multidisciplinary SC Education & Educational Research; Physics GA 679WP UT WOS:000182945200012 ER PT J AU McDonald, LA Barbieri, LR Carter, GT Kruppa, G Feng, XD Lotvin, JA Siegel, MM AF McDonald, LA Barbieri, LR Carter, GT Kruppa, G Feng, XD Lotvin, JA Siegel, MM TI FTMS structure elucidation of natural products: Application to muraymycin antibiotics using ESI multi-CHEF SORI-CID FTMSn, the top-down/bottom-up approach, and HPLC ESI capillary-skimmer CID FTMS SO ANALYTICAL CHEMISTRY LA English DT Article ID RESONANCE-MASS-SPECTROMETRY; INFRARED MULTIPHOTON DISSOCIATION; LIQUID-CHROMATOGRAPHY; PROTEIN; PERFORMANCE; EXCHANGE; IONS; TRAP AB The molecular formulas for the structures and substructures of muraymycin antibiotics A1 (C52H90N14O19, MW 1214) and B1 (C49H83N11O18, MW 1113) were determined using electrospray ionization (ESI) Fourier transform mass spectrometry (FTMS). The muraymycin A1 and B1 structures were elucidated by utilizing capillary-skimmer fragmentation with up to five stages of mass spectrometry (MS5). Multi-CHEF, a multiple ion isolation method, was used at each stage of MSn to isolate a parent ion and up to four reference ions, for exact-mass calibration. The parent ions were fragmented by SORI-CID and the product ions internally calibrated with average absolute mass errors less than 1 ppm at each stage in the fragmentation processes. Using the top-down/bottom-up approach, the molecular formulas for the antibiotics were determined by summing the elemental formulas of the neutral losses, obtained by measuring the mass differences (< 500 Da) between the genetically related sequential parent ion masses in the MSn spectra, with the unique elemental formula of the lowest parent ion mass (< 500 Da). The structures of 12 additional compounds in the muraymycin complex were elucidated using HPLC ESI capillary-skimmer CID FTMS by correlating their fragmentation patterns with those of muraymycins A1 and B1. Sequential neutral losses of an aminosugar, a valine, a uridine, and an ester fatty acid from the muraymycin parent ions provided diagnostic fragments for characterization. C1 Wyeth Ayerst Res, Chem Sci, Pearl River, NY 10965 USA. Sandia Natl Labs, Livermore, CA 94551 USA. RP Siegel, MM (reprint author), Wyeth Ayerst Res, Chem Sci, Pearl River, NY 10965 USA. NR 27 TC 35 Z9 35 U1 2 U2 4 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 JUN 1 PY 2003 VL 75 IS 11 BP 2730 EP 2739 DI 10.1021/ac0264731 PG 10 WC Chemistry, Analytical SC Chemistry GA 687VK UT WOS:000183397500031 PM 12948143 ER PT J AU Lee, H Williams, SKR Wahl, KL Valentine, NB AF Lee, H Williams, SKR Wahl, KL Valentine, NB TI Analysis of whole bacterial cells by flow field-flow fractionation and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry SO ANALYTICAL CHEMISTRY LA English DT Article ID VEROTOXIGENIC ESCHERICHIA-COLI; LINKED-IMMUNOSORBENT-ASSAY; MALDI-MS; CAPILLARY-ELECTROPHORESIS; RAPID IDENTIFICATION; PROTEINS; SEPARATION; COMPLEXES; REPRODUCIBILITY; PEPTIDES AB The purpose of this study is to develop a novel bacterial analysis method by coupling the flow field-flow fractionation (flow FFF) separation technique with detection by matrix-assisted laser desorption/ionization time-of-flight (MAILDI-TOF) mass spectrometry. The composition of carrier liquid used for flow FFF was selected based on retention of bacterial cells and compatibility with the MALDI process. The coupling of flow FFF and MALDI-TOF MS was demonstrated for P. putida and E. coli. Fractions of the whole cells were collected after separation by FFF and further analyzed by MALDI-MS. Each fraction, collected over different time intervals, corresponded to different sizes and possibly different growth stages of bacteria. The bacterial analysis by flow FFF/MALDI-TOF MS was completed within 1 h with only preliminary optimization of the process. C1 Colorado Sch Mines, Dept Chem & Geochem, Golden, CO 80401 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Williams, SKR (reprint author), Colorado Sch Mines, Dept Chem & Geochem, Golden, CO 80401 USA. OI Lee, Hookeun/0000-0002-0696-8421 NR 54 TC 54 Z9 58 U1 1 U2 14 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 JUN 1 PY 2003 VL 75 IS 11 BP 2746 EP 2752 DI 10.1021/ac020698u PG 7 WC Chemistry, Analytical SC Chemistry GA 687VK UT WOS:000183397500033 PM 12948145 ER PT J AU Tuinman, AA Lewis, LA Lewis, SA AF Tuinman, AA Lewis, LA Lewis, SA TI Trace-fiber color discrimination by electrospray ionization mass spectrometry: A tool for the analysis of dyes extracted from submillimeter nylon fibers SO ANALYTICAL CHEMISTRY LA English DT Article ID DISPERSE DYES; CHROMATOGRAPHY; SINGLE AB The application of electrospray ionization mass spectrometry (ESI-MS) to trace-fiber color analysis is explored using acidic dyes commonly employed to color nylon-based fibers, as well as extracts from dyed nylon fibers. Qualitative information about constituent dyes and quantitative information about the relative amounts of those dyes present on a single fiber become readily available using this technique. Sample requirements for establishing the color identity of different samples (i.e., comparative trace-fiber analysis) are shown to be submillimeter. Absolute verification of dye mixture identity (beyond the comparison of molecular weights derived from ESI-MS) can be obtained by expanding the technique to include tandem mass spectrometry (ESI-MS/MS). For dyes of unknown origin, the ESI-MS/MS analyses may offer insights into the chemical structure of the compound-information not available from chromatographic techniques alone. This research demonstrates that ESI-MS is viable as a sensitive technique for distinguishing dye constituents extracted from a minute amount of trace-fiber evidence. A protocol is suggested to establish/refute the proposition that two fibers-one of which is available in minute quantity only-are of the same origin. C1 Analyt Chem Org, Oak Ridge, TN 37830 USA. Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Engn Sci & Technol Div, Oak Ridge, TN 37831 USA. RP Lewis, LA (reprint author), Analyt Chem Org, Y-12 Natl Secur Complex,113C Union Valley Rd, Oak Ridge, TN 37830 USA. NR 10 TC 15 Z9 14 U1 0 U2 6 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 JUN 1 PY 2003 VL 75 IS 11 BP 2753 EP 2760 DI 10.1021/ac020618m PG 8 WC Chemistry, Analytical SC Chemistry GA 687VK UT WOS:000183397500034 PM 12948146 ER PT J AU Broyles, BS Jacobson, SC Ramsey, JM AF Broyles, BS Jacobson, SC Ramsey, JM TI Sample filtration, concentration, and separation integrated on microfluidic devices SO ANALYTICAL CHEMISTRY LA English DT Article ID SOLID-PHASE EXTRACTION; POLYCYCLIC AROMATIC-HYDROCARBONS; MICROCHIP CAPILLARY ELECTROPHORESIS; LIQUID-CHROMATOGRAPHY; PCR AMPLIFICATION; TRACE ENRICHMENT; WATER SAMPLES; CHIP; DNA; SYSTEMS AB Microfabricated devices integrating sample filtration, solid-phase extraction, and chromatographic separation with solvent programming were demonstrated. Filtering of the sample was accomplished at the sample inlet with an array of seven channels each 1 mum deep and 18 mum wide. Sample concentration and separation were performed on channels 5 mum deep and 25 mum wide coated with a C18 phase, and elution was achieved under isocratic, step, or linear gradient conditions. For the solid-phase extraction, signal enhancement factors of 400 over a standard injection of 1.0 s were observed for a 320-s injection. Four polycyclic aromatic compounds were resolved by open channel electrochromatography in under 50 s. Chip operation was unaffected by the presence of the 5-mum silica particles at the filter entrance. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Ramsey, JM (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. NR 43 TC 124 Z9 130 U1 3 U2 44 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 JUN 1 PY 2003 VL 75 IS 11 BP 2761 EP 2767 DI 10.1021/ac025503x PG 7 WC Chemistry, Analytical SC Chemistry GA 687VK UT WOS:000183397500035 PM 12948147 ER PT J AU Boland, T Mironov, V Gutowska, A Roth, EA Markwald, RR AF Boland, T Mironov, V Gutowska, A Roth, EA Markwald, RR TI Cell and organ printing 2: Fusion of cell aggregates in three-dimensional gels SO ANATOMICAL RECORD PART A-DISCOVERIES IN MOLECULAR CELLULAR AND EVOLUTIONARY BIOLOGY LA English DT Article DE organ printing; cell printing; cell aggregates; cell fusion; hydrogel ID TISSUE; GROWTH; STEREOLITHOGRAPHY; SCAFFOLDS AB We recently developed a cell printer (Wilson and Boland, 2003) that enables us to place cells in positions that mimic their respective positions in organs. However, this technology was limited to the printing of two-dimensional (2D) tissue constructs. Here we describe the use of thermosensitive gels to generate sequential layers for cell printing. The ability to drop cells on previously printed successive layers provides a real opportunity for the realization of three-dimensional (3D) organ printing. Organ printing will allow us to print complex 3D organs with computer-controlled, exact placing of different cell types, by a process that can be completed in several minutes. To demonstrate the feasibility of this novel technology, we showed that cell aggregates can be placed in the sequential layers of 3D gels close enough for fusion to occur. We estimated the optimum minimal thickness of the gel that can be reproducibly generated by dropping the liquid at room temperature onto a heated substrate. Then we generated cell aggregates with the corresponding (to the minimal thickness of the gel) size to ensure a direct contact between printed cell aggregates during sequential printing cycles. Finally, we demonstrated that these closely-placed cell aggregates could fuse in two types of thermosensitive 3D gels. Taken together, these data strongly support the feasibility of the proposed novel organ-printing technology. Anat Rec Part A 272A:497-502, 2003. (C) 2003 Wiley-Liss, Inc. C1 Clemson Univ, Dept Bioengn, Clemson, SC 29634 USA. Pacific NW Natl Lab, Richland, WA USA. Med Univ S Carolina, Dept Cell Biol & Anat, Charleston, SC 29425 USA. RP Boland, T (reprint author), Clemson Univ, Dept Bioengn, Clemson, SC 29634 USA. NR 21 TC 159 Z9 177 U1 11 U2 144 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 1552-4884 J9 ANAT REC PART A JI Anat. Rec. Part A PD JUN PY 2003 VL 272A IS 2 BP 497 EP 502 DI 10.1002/ar.a.10059 PG 6 WC Anatomy & Morphology SC Anatomy & Morphology GA 682EG UT WOS:000183077900004 PM 12740943 ER PT J AU Lario, D Roelof, EC Decker, RB Ho, GC Maclennan, CG Gosling, JT AF Lario, D Roelof, EC Decker, RB Ho, GC Maclennan, CG Gosling, JT TI Solar cycle variations of the energetic H/He intensity ratio at high heliolatitudes and in the ecliptic plane SO ANNALES GEOPHYSICAE LA English DT Article DE interplanetary physics; energetic particles, interplanetary shocks; solar wind plasma ID ADVANCED COMPOSITION EXPLORER; ULYSSES OBSERVATIONS; INTERACTION REGIONS; PARTICLE EVENTS; 1 AU; ION ENHANCEMENTS; CHARGE STATES; ALPHA MONITOR; WIND; HELIOSPHERE AB We study the variability of the heliospheric energetic proton-to-helium abundance ratios during different phases of the solar cycle. We use energetic particle, solar wind, and magnetic field data from the Ulysses, ACE and IMP-8 spacecraft to compare the H/He intensity ratio at high heliographic latitudes and in the ecliptic plane. During the first out-of-ecliptic excursion of Ulysses ( 1992-1996). the HI-SCALE instrument measured corotating energetic particle intensity enhancements characterized by low values (less than or equal to 10) of the 0.5-1.0 MeV nucleon(-1) H/He intensity ratio. During the second out-of-ecliptic excursion of Ulysses (1999-2002) the more frequent occurrence of solar energetic particle events resulted in almost continuously high (less than or equal to 20) values of the H/He ratio, even at the highest heliolatitudes reached by Ulysses. Comparison with in-ecliptic measurements from an identical instrument on the ACE spacecraft showed similar H/He values at ACE and Ulysses, suggesting a remarkable uniformity of energetic particle intensities in the solar maximum heliosphere at high heliolatitudes and in the ecliptic plane. In-ecliptic observations of the H/He intensity ratio from the IMP-8 spacecraft show variations between solar maximum and solar minimum similar to those observed by Ulysses at high heliographic latitudes. We suggest that the variation of the H/He intensity ratio throughout the solar cycle is due to the different level of transient solar activity, as well as the different structure and duration that corotating solar wind structures have under solar maximum and solar minimum conditions. During solar minimum, the interactions between the two different types of solar wind streams (slow vs. fast) are strong and long-lasting, allowing for a continuous and efficient acceleration of interstellar pickup He+. During solar maximum, transient events of solar origin (characterized by high values of the H/He ratio) are able to globally fill the heliosphere. In addition, during solar maximum, the lack of strong recurrent high-speed solar wind streams, together with the dynamic character of the Sun, lead to weak and short-lived solar wind stream interactions. This results in a less efficient acceleration of pickup He+, and thus a higher value of the H/He intensity ratio. C1 Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA. Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA. Los Alamos Natl Lab, Los Alamos, NM USA. RP Lario, D (reprint author), Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA. EM david.lario@jhuapl.edu RI Ho, George/G-3650-2015; Lario, David/D-9318-2016 OI Ho, George/0000-0003-1093-2066; Lario, David/0000-0002-3176-8704 NR 42 TC 4 Z9 4 U1 0 U2 0 PU EUROPEAN GEOPHYSICAL SOC PI KATLENBURG-LINDAU PA MAX-PLANCK-STR 13, 37191 KATLENBURG-LINDAU, GERMANY SN 0992-7689 J9 ANN GEOPHYS-GERMANY JI Ann. Geophys. PD JUN PY 2003 VL 21 IS 6 BP 1229 EP 1243 PG 15 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA 775NC UT WOS:000189046700003 ER PT J AU Brodsky, SJ Hiller, JR McCartor, G AF Brodsky, SJ Hiller, JR McCartor, G TI The mass renormalization of nonperturbative light-front Hamiltonian theory: an illustration using truncated, Pauli-Villars-regulated Yukawa interactions SO ANNALS OF PHYSICS LA English DT Article DE light-cone quantization; Pauli-Villars regularization; mass renormalization; Yukawa theory ID WAVE-FUNCTION REPRESENTATION; QUANTUM-FIELD THEORY; ONE TIME DIMENSION; CONE QUANTIZATION; COMPOSITE SYSTEMS; ONE SPACE; MODEL; REGULARIZATION; DYNAMICS; QCD AB We obtain analytic, nonperturbative, approximate solutions of Yukawa theory in the one-fermion sector using light-front quantization. The theory is regulated in the ultraviolet by the introduction of heavy Pauli-Villars scalar and fermion fields, each with negative norm. In order to obtain a directly soluble problem, fermion-pair creation and annihilation are neglected, and the number of bosonic constituents is limited to one of either type. We discuss some of the features of the wave function of the eigensolution, including its endpoint behavior and spin and orbital angular momentum content. The limit of infinite Pauli-Villars mass receives special scrutiny. (C) 2003 Elsevier Science (USA). All rights reserved. C1 Univ Minnesota, Dept Phys, Duluth, MN 55812 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. So Methodist Univ, Dept Phys, Dallas, TX 75275 USA. RP Hiller, JR (reprint author), Univ Minnesota, Dept Phys, 10 Univ Dr, Duluth, MN 55812 USA. EM jhiller@d.umn.edu NR 38 TC 21 Z9 21 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0003-4916 EI 1096-035X J9 ANN PHYS-NEW YORK JI Ann. Phys. PD JUN PY 2003 VL 305 IS 2 BP 266 EP 285 DI 10.1016/S0003-4916(03)00063-0 PG 20 WC Physics, Multidisciplinary SC Physics GA 687CF UT WOS:000183357700008 ER PT J AU Korber, B AF Korber, B TI Mechanisms of HIV-1 diversity SO ANTIVIRAL THERAPY LA English DT Meeting Abstract CT 12th International HIV Drug Resistance Workshop CY JUN 10-14, 2003 CL Los Cabos, MEXICO C1 Los Alamos Natl Lab, Los Alamos, NM USA. Santa Fe Inst, Santa Fe, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT MEDICAL PRESS LTD PI LONDON PA 2-4 IDOL LANE, LONDON EC3R 5DD, ENGLAND SN 1359-6535 J9 ANTIVIR THER JI Antivir. Ther. PD JUN PY 2003 VL 8 IS 3 MA 1 BP U17 EP U17 PG 1 WC Infectious Diseases; Pharmacology & Pharmacy; Virology SC Infectious Diseases; Pharmacology & Pharmacy; Virology GA 955YK UT WOS:000231265900013 ER PT J AU Mikucki, JA Liu, YT Delwiche, M Colwell, FS Boone, DR AF Mikucki, JA Liu, YT Delwiche, M Colwell, FS Boone, DR TI Isolation of a methanogen from deep marine sediments that contain methane hydrates, and description of Methanoculleus submarinus sp nov. SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID CASCADIA MARGIN; MICROBIAL COMMUNITIES; RENATURATION RATES; DNA HYBRIDIZATION; SEQUENCE-ANALYSIS; GROWTH-RATE; SEA-FLOOR; TEMPERATURE; EMENDATION; CULTURES AB We isolated a methanogen from deep in the sediments of the Nankai Trough off the eastern coast of Japan. At the sampling site, the water was 950 m deep and the sediment core was collected at 247 m below the sediment surface. The isolated methanogen was named Nankai-1. Cells of Nankai-1 were nonmotile and highly irregular coccoids (average diameter, 0.8 to 2 mum) and grew with hydrogen or formate as a catabolic substrate. Cells required acetate as a carbon source. Yeast extract and peptones were not required but increased the growth rate. The cells were mesophilic, growing most rapidly at 45degreesC (no growth at less than or equal to10degreesC or greater than or equal to55degreesC). Cells grew with a maximum specific growth rate of 2.43 day(-1) at 45degreesC. Cells grew at pH values between 5.0 and 8.7 but did not grow at pH 4.7 or 9.0. Strain Nankai-1 grew in a wide range of salinities, from 0.1 to 1.5 M Na+. The described phenotypic characteristics of this novel isolate were consistent with the in situ environment of the Nankai Trough. This is the first report of a methanogenic isolate from methane hydrate-bearing sediments. Phylogenetic analysis of its 16S rRNA gene sequence indicated that it is most closely related to Methanoculleus marisnigri (99.1% sequence similarity), but DNA hybridization experiments indicated a DNA sequence similarity of only 49%. Strain Nankai-1 was also found to be phenotypically similar to M. marisnigri, but two major phenotypic differences were found: strain Nankai-1 does not require peptones, and it grows fastest at a much higher temperature. We propose a new species, Methanoculleus submarinus, with strain Nankai-1 as the type strain. C1 Portland State Univ, Dept Biol, Portland, OR 97207 USA. Idaho Natl Environm & Engn Lab, Idaho Falls, ID USA. RP Boone, DR (reprint author), Portland State Univ, Dept Biol, POB 751, Portland, OR 97207 USA. NR 37 TC 84 Z9 90 U1 3 U2 17 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0099-2240 J9 APPL ENVIRON MICROB JI Appl. Environ. Microbiol. PD JUN PY 2003 VL 69 IS 6 BP 3311 EP 3316 DI 10.1128/AEM.69.6.3311-3316.2003 PG 6 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 752HZ UT WOS:000187156200036 PM 12788731 ER PT J AU Merrill, L Richardson, J Kuske, CR Dunbar, J AF Merrill, L Richardson, J Kuske, CR Dunbar, J TI Fluorescent heteroduplex assay for monitoring Bacillus anthracis and close relatives in environmental samples SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID 16S RIBOSOMAL-RNA; PERFORMANCE LIQUID-CHROMATOGRAPHY; NEAREST-NEIGHBOR THERMODYNAMICS; GRADIENT GEL-ELECTROPHORESIS; LENGTH POLYMORPHISM ANALYSIS; CENTER-DOT-A; MUTATION DETECTION; MOBILITY ASSAY; AMPLIFICATION PRODUCTS; GENETIC-RELATIONSHIPS AB A fluorescent heteroduplex method was developed to assess the presence of 16S rRNA gene (rDNA) sequences from Bacillus anthracis and close relatives in PCR-amplified 16S rDNA sequence mixtures from environmental samples. The method uses a single-stranded, fluorescent DNA probe, 464 nucleotides in length, derived from a B. anthracis 16S rRNA gene. The probe contains a unique, engineered deletion such that all probe-target duplexes are heteroduplexes with an unpaired G at position 343 (Delta343). Heteroduplex profiles of sequences greater than or equal to85% similar to the probe were produced using an ABI 377 sequencer in less than 3 h. The method divides strains of the Bacillus cereus-Bacillus thuringiensis-B. anthracis group into two subgroups. Each subgroup is defined by a specific 16S rRNA gene sequence type. Sequence type A, containing one mismatch with the probe, occurs in B. anthracis and a small number of closely related clonal lineages represented mostly by food-borne pathogenic isolates of B. cereus and B. thuringiensis. Sequence type B, containing two mismatches with the probe, is found in the majority of B. cereus and B. thuringiensis strains examined to date. Sequence types A and B, when hybridized to the probe, generate two easily differentiated heteroduplexes. Thus, from heteroduplex profiles, the presence of B. cereus-B. thuringiensis-B. anthracis subgroups in environmental samples can be inferred unambiguously. The results show that fluorescent heteroduplex analysis is an effective profiling technique for detection and differentiation of sequences representing small phylogenetic or functional groups in environmental samples. C1 Los Alamos Natl Lab, Biosci Div M888, Los Alamos, NM 87545 USA. RP Dunbar, J (reprint author), Los Alamos Natl Lab, Biosci Div M888, POB 1663, Los Alamos, NM 87545 USA. NR 47 TC 10 Z9 11 U1 0 U2 3 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0099-2240 J9 APPL ENVIRON MICROB JI Appl. Environ. Microbiol. PD JUN PY 2003 VL 69 IS 6 BP 3317 EP 3326 DI 10.1128/AEM.69.6.3317-3326.2003 PG 10 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 752HZ UT WOS:000187156200037 PM 12788732 ER PT J AU Cooper, DC Picardal, FW Schimmelmann, A Coby, AJ AF Cooper, DC Picardal, FW Schimmelmann, A Coby, AJ TI Chemical and biological interactions during nitrate and goethite reduction by Shewanella putrefaciens 200 SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID DISSIMILATIVE FE(III) REDUCTION; CRYSTALLINE IRON(III) OXIDES; SULFATE GREEN RUST; MICROBIAL REDUCTION; FERROUS IRON; FERRIC IRON; ANAEROBIC BIOTRANSFORMATION; CARBON-TETRACHLORIDE; BACTERIAL SURFACES; REDUCING BACTERIUM AB Although previous research has demonstrated that NO3- inhibits microbial Fe(III) reduction in laboratory cultures and natural sediments, the mechanisms of this inhibition have not been fully studied in an environmentally relevant medium that utilizes solid-phase, iron oxide minerals as a Fe(111) source. To study the dynamics of Fe and NO3- biogeochemistry when ferric (hydr)oxides are used as the Fe(111) source, Shewanella putrefaciens 200 was incubated under anoxic conditions in a low-ionic-strength, artificial groundwater medium with various amounts of NO3- and synthetic, high-surface-area goethite. Results showed that the presence of NO3- inhibited microbial goethite reduction more severely than it inhibited microbial reduction of the aqueous or microcrystalline sources of Fe(III) used in other studies. More interestingly, the presence of goethite also resulted in a twofold decrease in the rate of NO3- reduction, a 10-fold decrease in the rate of NO2- reduction, and a 20-fold increase in the amounts of N2O produced. Nitrogen stable isotope experiments that utilized delta(15)N values of N2O to distinguish between chemical and biological reduction of NO2- revealed that the N2O produced during NO2- or NO3- reduction in the presence of goethite was primarily of abiotic origin. These results indicate that concomitant microbial Fe(III) and NO3- reduction produces NO2- and Fe(II), which then abiotically react to reduce NO2- to N2O with the subsequent oxidation of Fe(II) to Fe(III). C1 Indiana Univ, Sch Publ & Environm Affairs, Environm Sci Res Ctr, Bloomington, IN 47405 USA. Indiana Univ, Dept Geol Sci, Bloomington, IN 47405 USA. RP Cooper, DC (reprint author), Idaho Natl Engn & Environm Lab, IF-IRC MS 2107,POB 1625, Idaho Falls, ID 83404 USA. NR 60 TC 58 Z9 62 U1 4 U2 28 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0099-2240 J9 APPL ENVIRON MICROB JI Appl. Environ. Microbiol. PD JUN PY 2003 VL 69 IS 6 BP 3517 EP 3525 DI 10.1128/AEM.69.6.3517-3525.2003 PG 9 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 752HZ UT WOS:000187156200062 PM 12788758 ER PT J AU Liu, XD Tiquia, SM Holguin, G Wu, LY Nold, SC Devol, AH Luo, K Palumbo, AV Tiedje, JM Zhou, JZ AF Liu, XD Tiquia, SM Holguin, G Wu, LY Nold, SC Devol, AH Luo, K Palumbo, AV Tiedje, JM Zhou, JZ TI Molecular diversity of denitrifying genes in continental margin sediments within the oxygen-deficient zone off the Pacific coast of Mexico SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID LENGTH-POLYMORPHISM ANALYSIS; MARINE NITROGEN-FIXATION; NITRITE REDUCTASE; SHELF SEDIMENTS; NORTH PACIFIC; AZOARCUS-TOLULYTICUS; ARABIAN SEA; NOSZ GENES; PORE-WATER; DENITRIFICATION AB understand the composition and structure of denitrifying communities in the oxygen-deficient zone off the Pacific coast of Mexico, the molecular diversity of nir genes from sediments obtained at four stations was examined by using a PCR-based cloning approach. A total of 50 operational taxonomic units (OTUs) for nirK and 82 OTUs for nirS were obtained from all samples. Forty-four of the nirS clones and 31 of the nirK clones were sequenced; the levels of similarity of the nirS clones were 52 to 92%, and the levels of similarity of the nirS clones were 50 to 99%. The percentages of overlapping OTUs between stations were 18 to 30% for nirS and 5 to 8% for nirK. Sequence analysis revealed that 26% of the nirS clones were related to the nirS genes of Alcaligenes faecalis (80 to 94% similar) and Pseudomonas stutzeri (80 to 99%), whereas 3 to 31% of the nirK clones were closely related to the nirK genes of Pseudomonas sp. strain G-179 (98 to 99%), Bradyrhizobium japonicum (91%), Blastobacter denitrificans (83%), and Alcaligenes xylosoxidans (96%). The rest of the clones, however, were less than 80% similar to nirS and nirK sequences available in sequence databases. The results of a principal-component analysis (PCA) based on the percentage of OTUs and biogeochemical data indicated that the nitrate concentration and oxygen have an effect on the denitrifying communities. The communities at the stations in oxygen-deficient zones were more similar than the communities at the stations in the oxygenated zone. The denitrifying communities were more similar at the stations that were closer together and had similar nitrate levels. Also, the results of PCA based on biogeochemical properties suggest that geographic location and biogeochemical conditions, especially the nitrate and oxygen levels, appear to be the key factors that control the structure of denitrifying communities. C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Hunan Agr Univ, Dept Plant Pathol, Changsha, Hunan, Peoples R China. Univ Wisconsin Stout, Dept Biol, Menomonie, WI 54751 USA. Univ Washington, Sch Oceanog, Seattle, WA 98295 USA. Michigan State Univ, Ctr Microbial Ecol, E Lansing, MI 48824 USA. RP Zhou, JZ (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA. EM zhouj@ornl.gov RI Palumbo, Anthony/A-4764-2011; Ducey, Thomas/A-6493-2011 OI Palumbo, Anthony/0000-0002-1102-3975; NR 47 TC 125 Z9 135 U1 4 U2 29 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0099-2240 J9 APPL ENVIRON MICROB JI Appl. Environ. Microbiol. PD JUN PY 2003 VL 69 IS 6 BP 3549 EP 3560 DI 10.1128/AEM.69.6.3549-3560.2003 PG 12 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 752HZ UT WOS:000187156200066 PM 12788762 ER PT J AU Jerden, JL Sinha, AK AF Jerden, JL Sinha, AK TI Phosphate based immobilization of uranium in an oxidizing bedrock aquifer SO APPLIED GEOCHEMISTRY LA English DT Article ID AUSTRALIA; MINE; TEMPERATURES; GROUNDWATERS; MIGRATION; DEPOSIT; ANALOG AB The unmined Coles Hill U deposit of south central Virginia represents a natural setting where U is stabilized by phosphate mineral precipitation in an oxidizing bedrock aquifer. Drill cores from the shallow portion of the deposit preserve a sharp Fe redox front defined by Fe(III) oxide staining. This front is located near a discontinuity in U mineralogy with U(IV) assemblages (e.g. coffinite, uraninite) on the reducing side, and U(VI) assemblages on the oxidizing side. The discontinuity in U mineralogy does not, however, represent a major discontinuity in whole rock U concentrations, with sample groups from both oxidized and reduced sides of the front generally ranging from 500 to 1000 ppm. This observation suggests that the volume of shallow bedrock associated with the deposit has not lost significant amounts of U during the oxidation and incipient chemical weathering. The precipitation of Ba uranyl phosphate (Ba meta-autunite) is responsible for U retention within this zone. Ground waters sampled from the weathered bedrock aquifer associated with the deposit contain less than 15 mug l(-1) dissolved U. This suggests that the low solubility of the Ba meta-autunite limits U concentrations to values lower than the US-EPA maximum contaminant level of 30 mug l(-1). Ground water speciation and mineral saturation calculations show that, in addition to Eh and pH, the most important factor controlling this U fixation process is the activity ratio of dissolved phosphate to dissolved carbonate. Experimental results suggest that, at the Coles Hill site, the oxidation of U(IV) to U(VI) and subsequent precipitation of uranyl phosphate occurs rapidly (time scale of weeks) relative to ground water transport (e.g. 20 m/a). Furthermore, based on the rate of downward migration of the redox front,it is estimated that the oldest U(VI) phosphate assemblages associated with the Coles Hill U deposit have been stable for up to 150 ka. These observations have important implications for the design and long term performance assessment of phosphate-based stabilization and reactive barrier techniques. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 Virginia Polytech Inst & State Univ, Dept Geol Sci, Blacksburg, VA 24061 USA. RP Jerden, JL (reprint author), Argonne Natl Lab, Div Chem Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. EM jerden@cmt.anl.gov; pitlab@vt.edu NR 42 TC 83 Z9 87 U1 2 U2 16 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0883-2927 J9 APPL GEOCHEM JI Appl. Geochem. PD JUN PY 2003 VL 18 IS 6 BP 823 EP 843 AR PII S0883-2927(02)00179-8 DI 10.1016/S0883-2927(02)00179-8 PG 21 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 672KV UT WOS:000182520500004 ER PT J AU Hebden, JC Boas, DA George, JS Durkin, AJ AF Hebden, JC Boas, DA George, JS Durkin, AJ TI Topics in biomedical optics: Introduction SO APPLIED OPTICS LA English DT Editorial Material AB The field of biomedical optics is experiencing tremendous growth. Biomedical technologies contribute in the creation of devices used in healthcare of various specialties (ophthalmology, cardiology, anesthesiology, and immunology, etc.). Recent research in biomedical optics is discussed. Overviews of meetings held at the 2002 Optical Society of America Biomedical Topical Meetings are presented. (C) 2003 Optical Society of America. C1 UCL, Dept Med Phys, London WC1E 6JA, England. Univ Calif Irvine, Beckman Laser Inst & Med Clin, Irvine, CA 92612 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Massachusetts Gen Hosp, Radiol NMR Ctr, Charlestown, MA 02129 USA. RP UCL, Dept Med Phys, 11-20 Capper St, London WC1E 6JA, England. EM adurkin@laser.bli.uci.edu OI Durkin, Anthony/0000-0001-9124-6388 NR 0 TC 6 Z9 6 U1 0 U2 1 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 JUN 1 PY 2003 VL 42 IS 16 BP 2869 EP 2870 DI 10.1364/AO.42.002869 PG 2 WC Optics SC Optics GA 685HL UT WOS:000183256600001 ER PT J AU Yao, XC Rector, DM George, JS AF Yao, XC Rector, DM George, JS TI Optical lever recording of displacements from activated lobster nerve bundles and Nitella internodes SO APPLIED OPTICS LA English DT Article; Proceedings Paper CT Biomedical Topical Meeting of the Optical-Society-of-America CY 2002 CL MIAMI BEACH, FL SP Optl Soc Amer ID RAPID STRUCTURAL-CHANGES; SQUID GIANT-AXONS; LIGHT-SCATTERING; ACTION-POTENTIALS; IN-VIVO; FIBERS; BIREFRINGENCE; STIMULATION; SIGNALS; PROPAGATION AB An optical lever was designed for studying physical displacements associated with electrophysiological activation of lobster nerve bundles. Stimulation current pulses generated a compound action potential volley, and upward physical displacements of <1 nm were recorded. The swelling displacement propagated in the same direction as the action potential volley, occurred simultaneously with the action potentials, and required 10 ms to relax after the electrical potential was restored. For comparison with previous reports, we also recorded the displacement of Nitella internodes associated with electrical stimulation. We found that a rapid swelling displacement (similar to 10 nm) was followed by a larger, slow-shrinking displacement (similar to100 nm). (C) 2003 Optical Society of America. C1 Los Alamos Natl Lab, Biophys Grp MSD454, Los Alamos, NM 87545 USA. Washington State Univ, Dept Vet Comparat Anat Pharmacol & Physiol, Pullman, WA 99164 USA. RP Los Alamos Natl Lab, Biophys Grp MSD454, POB 1663, Los Alamos, NM 87545 USA. EM jsg@lanl.gov FU NIMH NIH HHS [MH60263, MH60993] NR 34 TC 36 Z9 37 U1 1 U2 7 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 JUN 1 PY 2003 VL 42 IS 16 BP 2972 EP 2978 DI 10.1364/AO.42.002972 PG 7 WC Optics SC Optics GA 685HL UT WOS:000183256600014 PM 12790447 ER PT J AU Giesbrecht, GR Clark, DL Gordon, JC Scott, BL AF Giesbrecht, GR Clark, DL Gordon, JC Scott, BL TI Syntheses and structures of mono-cyclopentadienyl di-iodide complexes of the lanthanides: X-ray crystal structures of Cp ''' LaI(2)py(3) (Cp ''' = [eta(5)-C5H2(SiMe3)(3)-1,2,4](-); py = pyridine) and Cp ''' LaI2(bipy)py (bipy=2,2 '-bipyridine) SO APPLIED ORGANOMETALLIC CHEMISTRY LA English DT Article DE lanthanum; iodide; bulky cyclopentadienyl ID LIGAND-EXCHANGE REACTIONS; ORGANOMETALLIC CHEMISTRY; LITHIUM COMPLEXES; MONO(CYCLOPENTADIENYL) COMPLEXES; ORGANOLANTHANIDE CHEMISTRY; MOLECULAR-STRUCTURE; ANCILLARY LIGANDS; BENZYL COMPLEXES; METAL OXIDATION; YTTERBIUM AB [eta(5)-C5H2(SiMe3)(3)-1,2,4]K reacts with LaI3(THF)(4) in tetrahydrofuran (THF) to form the mono-ring complex [eta(5)-C5H2(SiMe3)(3)-1,2,4]LaI2(THF)(x) (1). Elemental analysis and H-1 NMR spectroscopy indicate that the coordinated THF molecules are labile and are easily removed under vacuum. The THF adduct 1 is readily converted to the more stable pyridine complex [eta(5)-C5H2(SiMe3)(3)-1,2,41LaI(2)py(3) (2) by the addition of excess pyridine to a toluene solution of 1. Although solid samples of 2 lose pyridine less readily, the pyridine molecules exchange with solvent molecules, and in the presence of a large excess of THF, 1 is re-formed. Complex 2 may be crystallized from toluene, and an X-ray diffraction study revealed a monomeric species with the two iodide ligands trans to each other, and three pyridines arranged in a meridional fashion. The addition of one equivalent of 2,2'-bipyridine to a toluene solution of 1 yields the bipyridine adduct, [eta(5)-C5H2(SiMe3)(3)-1,2,4]LaI2(bipy) (3). In contrast to 1 and 2, the bipyridine molecule in 3 remains ligated to the lanthanum center in all solvents. Complex 3-py may be crystallized from THF-pyridine; in this case, the presence of bipyridine forces a cis orientation of the two iodide ligands. Copyright (C) 2003 John Wiley Sons, Ltd. C1 Los Alamos Natl Lab, Nucl Mat Technol Div, NMT DO, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Glenn T Seaborg Inst Transactinium Sci, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Chem Div C, Los Alamos, NM 87545 USA. RP Gordon, JC (reprint author), Los Alamos Natl Lab, Nucl Mat Technol Div, NMT DO, Mail Stop J514, Los Alamos, NM 87545 USA. RI Clark, David/A-9729-2011; Scott, Brian/D-8995-2017 OI Scott, Brian/0000-0003-0468-5396 NR 46 TC 12 Z9 12 U1 0 U2 4 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 0268-2605 J9 APPL ORGANOMET CHEM JI Appl. Organomet. Chem. PD JUN-JUL PY 2003 VL 17 IS 6-7 BP 473 EP 479 DI 10.1002/aoc.461 PG 7 WC Chemistry, Applied; Chemistry, Inorganic & Nuclear SC Chemistry GA 686ZH UT WOS:000183351000022 ER PT J AU Jaiswal, SL Simpson, JT Withrow, SP White, CW Norris, PM AF Jaiswal, SL Simpson, JT Withrow, SP White, CW Norris, PM TI Design of a nanoscale silicon laser SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING LA English DT Article ID QUANTUM DOTS; POROUS SILICON; OPTICAL GAIN; WAVE-GUIDES; PHOTOLUMINESCENCE; NANOCRYSTALS; SIO2; ELECTROLUMINESCENCE; NANOPARTICLES; FORMULATION AB The recent observation of optical gain from silicon nanocrystals embedded in SiO2 opens an opportunity to develop a nanoscale silicon-based laser. However, the challenge remains to design and develop a laser architecture using CMOS-compatible materials. In this paper we present two designs for a waveguide laser in which silicon nanocrystals embedded in SiO2 are used as the optical gain media. One design employs a SiO2 membrane containing encapsulated Si nanocrystals. Preliminary calculations given here show that a highly resonant laser cavity can be produced in a SiO2 membrane using sub-wavelenath structures. This photonic crystal architecture, used to guide and contain the light, can be combined with a gain medium of optically active Si nanocrystals synthesized in the SiO2 membrane using ion implantation/thermal annealing to produce a Si-based laser. The laser cavity dimensions can be matched to the near-infrared wavelengths where optical gain has been observed from Si nanocrystals. The second design utilizes silicon nanocrystals embedded in a distributed-feedback laser cavity fabricated in SiO2. Lasing action over a broad wavelength range centered at similar to 770 nm should be possible in both of these configurations. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Virginia, Charlottesville, VA USA. RP Jaiswal, SL (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 20 TC 26 Z9 29 U1 1 U2 10 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0947-8396 J9 APPL PHYS A-MATER JI Appl. Phys. A-Mater. Sci. Process. PD JUN PY 2003 VL 77 IS 1 BP 57 EP 61 DI 10.1007/s00339-003-2093-9 PG 5 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 689YU UT WOS:000183521200007 ER PT J AU Gallagher, NB Wise, BM Sheen, DM AF Gallagher, NB Wise, BM Sheen, DM TI Error analysis for estimation of trace vapor concentration pathlength in stack plumes SO APPLIED SPECTROSCOPY LA English DT Article DE chemometrics; remote sensing; hyperspectral imaging; propagation of error ID CALIBRATION AB Near-infrared hyperspectral imaging is finding utility in remote sensing applications such as detection and quantification of chemical vapor effluents in stack plumes. Optimizing the sensing system or quantification algorithms is difficult because reference images are rarely well characterized. The present work uses a radiance model for a down-looking scene and a detailed noise model for dispersive and Fourier transform spectrometers to generate well-characterized synthetic data. These data were used with a classical least-squares-based estimator in an error analysis to obtain estimates of different sources of concentration-pathlength quantification error in the remote sensing problem. Contributions to the overall quantification error were the sum of individual error terms related to estimating the background, atmospheric corrections, plume temperature, and instrument signal-to-noise ratio. It was found that the quantification error depended strongly on errors in the background estimate and second-most on instrument signal-to-noise ratio. Decreases in net analyte signal (e.g., due to low analyte absorbance or increasing the number of analytes in the plume) led to increases in the quantification error as expected. These observations have implications on instrument design and strategies for quantification. The outlined approach could be used to estimate detection limits or perform variable selection for given sensing problems. C1 Eigenvector Res Inc, Manson, WA 98831 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Gallagher, NB (reprint author), Eigenvector Res Inc, POB 561, Manson, WA 98831 USA. NR 12 TC 9 Z9 9 U1 0 U2 2 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 USA SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD JUN PY 2003 VL 57 IS 6 BP 614 EP 621 DI 10.1366/000370203322005283 PG 8 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA 704UH UT WOS:000184358500004 PM 14658692 ER PT J AU Rasmussen, S Chen, LH Nilsson, M Abe, S AF Rasmussen, S Chen, LH Nilsson, M Abe, S TI Bridging nonliving and living matter SO ARTIFICIAL LIFE LA English DT Review DE proto-cells; origins of life; nanotechnology; supermolecular chemistry; self-assembly; physical chemistry; photochemistry; multiscale simulation; evolution; artificial chemistry ID PEPTIDE NUCLEIC-ACID; MOLECULAR-DYNAMICS; SELF-REPRODUCTION; ELECTRON-TRANSFER; EXCITED-STATES; AMINO-ACIDS; DNA; LIFE; MODEL; RNA AB Assembling non-biological materials (geomaterials) into a proto-organism constitutes a bridge between nonliving and living matter. In this article we 2 present a simple step-by-step route to assemble a proto-organism. Many pictures have been proposed to describe this transition within the origins-of-life and artificial life communities, and more recently alternative pictures have been emerging from advances in nanoscience and biotechnology. The proposed proto-organism lends itself to both traditions and defines a new picture based on a simple idea: Given a set of required functionalities, minimize the physicochemical structures that support these functionalities, and make sure that all Structures self-assemble and Mutually enhance each other's existence. The result is the first concrete, rational design of a simple physicochemical system that integrates the key functionalities in a thermodynamically favorable manner as a lipid aggregate integrates proto-genes and a proto-metabolisin. Under external pumping of free energy, the metabolic processes produce the required building blocks, and only specific gene sequences enhance the metabolic kinetics sufficiently for the whole system to survive. We propose an experimental implementation of the proto-organism with a discussion of our experimental results, together with relevant results produced by other experimental groups, and we specify what is still missing experimentally. Identifying the missing steps is just as important as providing the road map for the transition. We derive the kinetic and thermodynamic conditions of each of the proto-organism subsystems together with relevant theoretical and computational results about these subsystems. We present and discuss detailed 3D simulations of the lipid aggregation processes. From the reaction kinetics we derive analytical aggregate size distributions, and derive key properties of the metabolic efficiency and stability. Thermodynamics and kinetics of the ligation directed self-replication of the proto-genes is discussed, and we summarize the full life cycle of the proto-organism by comparing size, replication time, and energy with the biomass efficiency of contemporary unicells. Finally, we also compare our proto-organism picture with existing origins-of-life and protocell pictures. By assembling one possible bridge between nonliving and living matter we hope to provide a piece in the ancient puzzle about who we are and where we come from. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Santa Fe Inst, Santa Fe, NM 87506 USA. Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA. RP Los Alamos Natl Lab, EES 6,MS T003, Los Alamos, NM 87545 USA. EM steen@lanl.gov; lhchen@anl.gov; nilsson@lanl.gov; sabe@anl.gov RI nilsson jacobi, martin/C-9296-2012 NR 108 TC 105 Z9 115 U1 66 U2 266 PU MIT PRESS PI CAMBRIDGE PA ONE ROGERS ST, CAMBRIDGE, MA 02142-1209 USA SN 1064-5462 EI 1530-9185 J9 ARTIF LIFE JI Artif. Life PD SUM PY 2003 VL 9 IS 3 BP 269 EP 316 DI 10.1162/106454603322392479 PG 48 WC Computer Science, Artificial Intelligence; Computer Science, Theory & Methods SC Computer Science GA 717XJ UT WOS:000185115800003 PM 14556688 ER PT J AU Westphalen, D Roth, KW Brodrick, J AF Westphalen, D Roth, KW Brodrick, J TI Fuzzy logic for controls SO ASHRAE JOURNAL LA English DT Article C1 TIAX, HVAC R Grp, Cambridge, MA USA. TIAX, Appliance & Bldg Technol Sector, Cambridge, MA USA. US DOE, Bldg Technol Program, Washington, DC USA. RP Westphalen, D (reprint author), TIAX, HVAC R Grp, Cambridge, MA USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER SOC HEATING REFRIGERATING AIR-CONDITIONING ENG, INC, PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA SN 0001-2491 J9 ASHRAE J JI ASHRAE J. PD JUN PY 2003 VL 45 IS 6 BP K31 EP K31 PG 1 WC Thermodynamics; Construction & Building Technology; Engineering, Mechanical SC Thermodynamics; Construction & Building Technology; Engineering GA 687GB UT WOS:000183367200021 ER PT J AU Stern, D Holden, B Stanford, SA Spinrad, H AF Stern, D Holden, B Stanford, SA Spinrad, H TI Confirmation of a radio-selected galaxy overdensity at z=1.11 SO ASTRONOMICAL JOURNAL LA English DT Article DE cosmology : observations; galaxies : active; galaxies : evolution; galaxies : individual (MG1 J044226+0202); X-rays ID INFRARED STANDARD STARS; DARK MATTER THEORY; 5 GHZ SURVEY; X-RAY; HIGH-REDSHIFT; CHANDRA OBSERVATIONS; ELLIPTIC GALAXIES; CLUSTER EVOLUTION; RICH CLUSTERS; DEEP SURVEY AB We report the discovery of a galaxy overdensity at z=1.11 associated with the z=1.110 high-redshift radio galaxy MG1 J04426+0202 (hereafter MG 0442+0202). The group, Cl 0442+0202, was found in a near-infrared survey of z>1 radio galaxies undertaken to identify spatially coincident regions with a high density of objects red in I-K' color, typical of z>1 elliptical galaxies. Spectroscopic observations from the Keck I telescope reveal five galaxies within 35" of MG 0442+0202 at 1.105x10(-16) ergs cm(-2) s(-1)]. One of these point sources is identified with a radio-quiet type II quasar at z=1.863, akin to sources recently reported in deep Chandra surveys. The limit on an extended hot intracluster medium in the Chandra data is S(1-6 keV)<1.9x10(-15) ergs cm(-2) s(-1) (3σ, 30&DPRIME; radius aperture). Though the X-ray observations do not confirm the existence of a massive bound cluster at z>1, the success of the optical/near-infrared targeting of early-type systems near the radio galaxy validates searches using radio galaxies as beacons for high-redshift large-scale structure. We interpret Cl 0442+0202 as a massive cluster in the process of formation. C1 CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. RP Stern, D (reprint author), CALTECH, Jet Prop Lab, MS 169-327,4800 Oak Grove Dr, Pasadena, CA 91109 USA. NR 70 TC 24 Z9 24 U1 0 U2 4 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD JUN PY 2003 VL 125 IS 6 BP 2759 EP 2768 DI 10.1086/374229 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 684YM UT WOS:000183234100001 ER PT J AU Afonso, C Albert, JN Alard, C Andersen, J Ansari, R Aubourg, E Bareyre, P Bauer, F Beaulieu, JP Blanc, G Bouquet, A Char, S Charlot, X Couchot, F Coutures, C Derue, F Ferlet, R Fouque, P Glicenstein, JF Goldman, B Gould, A Graff, D Gros, M Haissinski, J Hamadache, C Hamilton, JC Hardin, D de Kat, J Kim, A Lasserre, T LeGuillou, L Lesquoy, E Loup, C Magneville, C Mansoux, B Marquette, JB Maurice, E Maury, A Milsztajn, A Moniez, M Palanque-Delabrouille, N Perdereau, O Prevot, L Regnault, N Rich, J Spiro, M Tisserand, P Vidal-Madjar, A Vigroux, L Zylberajch, S AF Afonso, C Albert, JN Alard, C Andersen, J Ansari, R Aubourg, E Bareyre, P Bauer, F Beaulieu, JP Blanc, G Bouquet, A Char, S Charlot, X Couchot, F Coutures, C Derue, F Ferlet, R Fouque, P Glicenstein, JF Goldman, B Gould, A Graff, D Gros, M Haissinski, J Hamadache, C Hamilton, JC Hardin, D de Kat, J Kim, A Lasserre, T LeGuillou, L Lesquoy, E Loup, C Magneville, C Mansoux, B Marquette, JB Maurice, E Maury, A Milsztajn, A Moniez, M Palanque-Delabrouille, N Perdereau, O Prevot, L Regnault, N Rich, J Spiro, M Tisserand, P Vidal-Madjar, A Vigroux, L Zylberajch, S TI Bulge microlensing optical depth from EROS 2 observations SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE Galaxy : stellar content; Galaxy : structure; gravitational lensing ID GRAVITATIONAL LENSING EXPERIMENT; DIFFERENCE IMAGE-ANALYSIS; GALACTIC SPIRAL ARMS; MILKY-WAY; MACHO PROJECT; CLUMP GIANTS; BAR; STARS; HALO; EVENTS AB We present a measurement of the microlensing optical depth toward the Galactic bulge based on the analysis of 15 contiguous 1 deg(2) fields centered on (l = 2.degrees5, b = -4.degrees0) and containing N-* = 1.42 x 10(6) clump-giant stars ( belonging to the extended clump area) monitored during almost three bulge seasons by EROS (Experience de Recherche d'Objets Sombres). We find tau(bulge) = 0.94 +/- 0.29 x 10(-6) averaged over all fields, based on 16 microlensing events with clump giants as sources. This value is substantially below several other determinations by the MACHO and OGLE groups and is more in agreement with what is expected from axisymmetric and non-axisymmetric bulge models. C1 Ctr Etud Saclay, CEA, DSM, F-91191 Gif Sur Yvette, France. Univ Paris 11, Lab Accelerateur Lineaire, IN2P3, CNRS, F-91405 Orsay, France. INSU CNRS, DASGAL, F-75014 Paris, France. Observ Marseille, F-13248 Marseille 04, France. Coll France, IN2P3, CNRS, F-75231 Paris, France. CNRS, Inst Astrophys Paris, INSU, F-75014 Paris, France. Univ Copenhagen, Astron Observ, DK-2100 Copenhagen, Denmark. Univ La Serena, Fac Ciencias, Dept Fis, La Serena, Chile. Ohio State Univ, Dept Astron, Columbus, OH 43210 USA. Observ Paris, LESIA, F-92195 Meudon, France. New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA. European So Observ, Santiago 19, Chile. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Afonso, C (reprint author), Ctr Etud Saclay, CEA, DSM, F-91191 Gif Sur Yvette, France. EM afonso@hep.saclay.cea.fr RI Bauer, Florian/G-8816-2011; Le Guillou, Laurent/B-7712-2009 NR 44 TC 66 Z9 66 U1 0 U2 1 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2003 VL 404 IS 1 BP 145 EP 156 DI 10.1051/0004-6361:20030307 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 682FP UT WOS:000183081300017 ER PT J AU Vermeulen, RC Pihlstrom, YM Tschager, W de Vries, WH Conway, JE Barthel, PD Baum, SA Braun, R Bremer, MN Miley, GK O'Dea, CP Rottgering, HJA Schilizzi, RT Snellen, IAG Taylor, GB AF Vermeulen, RC Pihlstrom, YM Tschager, W de Vries, WH Conway, JE Barthel, PD Baum, SA Braun, R Bremer, MN Miley, GK O'Dea, CP Rottgering, HJA Schilizzi, RT Snellen, IAG Taylor, GB TI Observations of HI absorbing gas in compact radio sources at cosmological redshifts SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : active; galaxies : evolution; galaxies : ISM; radio lines : galaxies ID EARLY-TYPE GALAXIES; STEEP-SPECTRUM; MOLECULAR GAS; INTERSTELLAR MATTER; CIRCUMNUCLEAR DISK; ELLIPTIC GALAXIES; ABSORPTION; EMISSION; NUCLEI AB We present an overview of the occurrence and properties of atomic gas associated with compact radio sources at redshifts up to z = 0.85. Searches for H I 21 cm absorption were made with the Westerbork Synthesis Radio Telescope at UHF-high frequencies (725 - 1200 MHz). Detections were obtained for 19 of the 57 sources with usable spectra (33%). We have found a large range in line depths, from tau = 0.16 to tau less than or equal to 0.001. There is a substantial variety of line profiles, including Gaussians of less than 10 km s(-1), to more typically 150 km s(-1), as well as irregular and multi-peaked absorption profiles, sometimes spanning several hundred km s(-1). Assuming uniform coverage of the entire radio source, we obtain column depths of atomic gas between 1 x 10(19) and 3.3 x 10(21) (T-sp/100 K)(1/f) cm(-2). There is evidence for significant gas motions, but in contrast to earlier results at low redshift, there are many sources in which the H I velocity is substantially negative (up to v = - 1420 km s(-1)) with respect to the optical redshift, suggesting that in these sources the atomic gas, rather than falling into the centre, may be be flowing out, interacting with the jets, or rotating around the nucleus. C1 Netherlands Fdn Res Astron, NL-7990 AA Dwingeloo, Netherlands. Natl Radio Astron Observ, Socorro, NM 87801 USA. Onsala Space Observ, S-43992 Onsala, Sweden. Leiden Observ, NL-2300 RA Leiden, Netherlands. Univ Groningen, Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. Univ Bristol, Dept Astrophys, Bristol BS8 1TH, Avon, England. JIVE, NL-7990 AA Dwingeloo, Netherlands. Univ Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland. RP Vermeulen, RC (reprint author), Netherlands Fdn Res Astron, POB 2, NL-7990 AA Dwingeloo, Netherlands. EM rvermeulen@astron.nl NR 31 TC 83 Z9 84 U1 0 U2 0 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2003 VL 404 IS 3 BP 861 EP 870 DI 10.1051/0004-6361:20030468 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 686UM UT WOS:000183339400009 ER PT J AU Nobili, S Goobar, A Knop, R Nugent, P AF Nobili, S Goobar, A Knop, R Nugent, P TI The intrinsic colour dispersion in Type Ia supernovae SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE supernovae : general; stars : statistics ID BVRI LIGHT CURVES; ULTRAVIOLET EXTINCTION; COSMOLOGICAL CONSTANT; ACCELERATING UNIVERSE; INTERGALACTIC DUST; LAMBDA; OMEGA AB The properties of low-redshift Type Ia supernovae are investigated using published multi-band optical broadband data from the Calan/Tololo and CfA surveys. The average time evolution of B - V, V - R, R - I, B - I and V - I, the intrinsic dispersion and time correlations are studied. This information is required to deduce the extinction of such explosions from the measured colours. We find that extinction corrections on individual SNe based on their colours up to 40 days past the B-band lightcurve maximum are generaly limited to sigma(AV) greater than or similar to 0.1, due to intrinsic variations, as far as it can be conservatively deduced with the current sample of data. However, we find that the V - R colour, especially at late times, is consistent with a negligible intrinsic spread, and may be the most accurate estimator for extinction. C1 Univ Stockholm, Dept Phys, SCFAB, S-10691 Stockholm, Sweden. Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Nobili, S (reprint author), Univ Stockholm, Dept Phys, SCFAB, Vanadisvagen 9, S-10691 Stockholm, Sweden. NR 26 TC 37 Z9 38 U1 0 U2 0 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUN PY 2003 VL 404 IS 3 BP 901 EP 912 DI 10.1051/0004-6361:20030536 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 686UM UT WOS:000183339400012 ER PT J AU Drake, AJ AF Drake, AJ TI On the selection of photometric planetary transits SO ASTROPHYSICAL JOURNAL LA English DT Article DE binaries : eclipsing; planetary systems; stars : low-mass, brown dwarfs ID DIFFERENCE IMAGE-ANALYSIS; LOW-MASS STARS; MACHO PROJECT; ATMOSPHERES; MODELS AB We present a new method for differentiating between planetary transits and eclipsing binaries on the basis of the presence of ellipsoidal light variations. These variations can be used to detect stellar secondaries with masses of similar to0.2 M-circle dot orbiting Sun-like stars at a photometric accuracy level that has already been achieved in transit surveys. By removing candidates exhibiting this effect, it is possible to greatly reduce the number of objects requiring spectroscopic follow-up with large telescopes. Unlike the usual candidate selection methods, which are based primarily on the estimated radius of the orbiting object, this technique is not biased against bona. de planets and brown dwarfs with large radii because the amplitude of the effect depends on the transiting object's mass and orbital distance. In many binary systems where a candidate planetary transit is actually due to the partial eclipse of two normal stars, the presence of flux variations due to the gravity darkening effect will show the true nature of these systems. We show that many of the recent OGLE III photometric transit candidates exhibit the presence of significant variations in their light curves and are likely to be due to stellar secondaries. We find that the light curves of white dwarf transits generally will not mimic those of small planets because of significant gravitationally induced flux variations. We discuss the relative merits of methods used to detect transit candidates that are due to stellar blends rather than planets. We outline how photometric observations taken in two bands can be used to detect the presence of stellar blends. C1 Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA. Pontificia Univ Catolica Chile, Dept Astron, Santiago 22, Chile. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Drake, AJ (reprint author), Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA. NR 34 TC 37 Z9 38 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD JUN 1 PY 2003 VL 589 IS 2 BP 1020 EP 1026 DI 10.1086/374714 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 681NX UT WOS:000183043200033 ER PT J AU Aguilar, A Covington, AM Hinojosa, G Phaneuf, RA Alvarez, I Cisneros, C Bozek, JD Dominguez, I Sant'Anna, MM Schlachter, AS Nahar, SN McLaughlin, BM AF Aguilar, A Covington, AM Hinojosa, G Phaneuf, RA Alvarez, I Cisneros, C Bozek, JD Dominguez, I Sant'Anna, MM Schlachter, AS Nahar, SN McLaughlin, BM TI Absolute photoionization cross section measurements of O II ions from 29.7 to 46.2 eV SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE atomic data; atomic processes; methods : laboratory ID OSCILLATOR-STRENGTHS; ATOMIC DATA; K+ IONS; ULTRAVIOLET; THRESHOLD; OXYGEN; STATE; RECOMBINATION; NITROGEN AB Absolute photoionization cross sections have been measured for a mixture of ground-state and metastable O II (O+) ions at photon energies ranging from 29.9 to 46.0 eV (414.7 to 269.5 Angstrom). All measurements were performed by merging an O+ beam with synchrotron radiation from an undulator beam line at the Advanced Light Source (ALS). At a resolution of 17 meV, more than 70 spectral features have been resolved, most of them identified and characterized. These measurements are compared with two independent R-matrix calculations and the data in TOPbase. All three calculations agree within 25% on the direct photoionization cross section, and with the absolute measurements within 40%. Some differences are noted in the predicted resonance positions among the three close-coupling R-matrix calculations, the TOPbase data being the least accurate. The estimated total experimental uncertainty varies from 15% to 20%. Such measurements benchmark theoretical photoionization cross section calculations performed within the framework of the Opacity Project and the Iron Project. C1 Univ Nevada, Dept Phys, Reno, NV 89557 USA. Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, Mexico. Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. Ohio State Univ, Dept Astron, Columbus, OH 43210 USA. Harvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138 USA. RP Aguilar, A (reprint author), Univ Nevada, Dept Phys, Reno, NV 89557 USA. RI Bozek, John/E-4689-2010; Sant'Anna, Marcelo/B-9355-2013; Bozek, John/E-9260-2010; Dominguez-Lopez, Ivan/B-6072-2016 OI Sant'Anna, Marcelo/0000-0001-5342-5799; Bozek, John/0000-0001-7486-7238; Dominguez-Lopez, Ivan/0000-0001-8084-8711 NR 34 TC 26 Z9 26 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD JUN PY 2003 VL 146 IS 2 BP 467 EP 477 DI 10.1086/368077 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 680ZP UT WOS:000183010200010 ER PT J AU Doran, JC Berkowitz, CM Coulter, RL Shaw, WJ Spicer, CW AF Doran, JC Berkowitz, CM Coulter, RL Shaw, WJ Spicer, CW TI The 2001 Phoenix Sunrise experiment: vertical mixing and chemistry during the morning transition in Phoenix SO ATMOSPHERIC ENVIRONMENT LA English DT Article DE morning transition; CO profiles; O-3 profiles; vertical mixing; urban air quality AB A field experiment was carried out in Phoenix during June 2001 to examine the role of vertical mixing on the O-3 chemistry of the boundary layer during the morning transition from stable to unstable atmospheric conditions. Surface instruments, instruments located on two floors of a 39 story building in downtown Phoenix, and an instrumented airplane were used to characterize the evolving chemistry in the lowest 650 m of the atmosphere. Remote sensing and in situ platforms were used to obtain detailed profiles of winds and temperatures during the early morning hours and for several hours after sunrise. The analysis presented in this paper focuses on vertical profiles of CO, O-3, and NO/NOy measured on the building and their relationship to the morning boundary layer evolution over Phoenix. Some features of these profiles were found that are consistent with a simple conceptual picture of nighttime trapping of pollutants in a stable surface layer and a subsequent release the following morning. On some days, however, evidence of significant vertical mixing was found during the early morning hours well before the times expected for the development of convective mixing after sunrise. Possible causes include advection, street canyon turbulence, and large-scale convergence, but a satisfactory explanation for the observed evolution of the chemical profiles has not yet been found. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Battelle Columbus Operationsm, Columbus, OH 43201 USA. RP Doran, JC (reprint author), Pacific NW Natl Lab, POB 999,MSIN K9-30, Richland, WA 99352 USA. NR 11 TC 29 Z9 29 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1352-2310 J9 ATMOS ENVIRON JI Atmos. Environ. PD JUN PY 2003 VL 37 IS 17 BP 2365 EP 2377 DI 10.1016/S1352-2310(03)00134-1 PG 13 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 678WF UT WOS:000182889100007 ER PT J AU Tadesse, I Green, FB Puhakka, JA AF Tadesse, I Green, FB Puhakka, JA TI The role of sulphidogenesis in anaerobic treatment phase of tannery wastewater treatment in advanced integrated wastewater pond system SO BIODEGRADATION LA English DT Article DE advanced facultative pond; methanogenesis; submerged fermentation pit; sulphidogenesis; tannery wastewater ID METHANE-PRODUCING BACTERIA; SULFATE-REDUCING BACTERIA; OUT-COMPETE METHANOGENS; SLUDGE; REDUCTION; REDUCERS; FERMENTATION; PERFORMANCE; DEGRADATION; INHIBITION AB An outdoor experiment was conducted to study the competition between Sulphate Reducing Bacteria (SRB) and Methanogenic Archaea (MA) in anaerobic treatment phase of tannery wastewater treatment in pilot-scale Advanced Facultative Pond (AFP). The relative electron flow towards sulphate reduction was higher (59-83%) than towards methanogenesis (17-41%), although the COD recovery within the reactor varied between 15 and 90%. The results also demonstrated that the flow of electrons towards SRB increased with increase of the sulphate concentration and decrease of the COD: SO4= ratio. C1 Tampere Univ Technol, Inst Environm Engn & Biotechnol, FIN-33101 Tampere, Finland. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Tadesse, I (reprint author), Tampere Univ Technol, Inst Environm Engn & Biotechnol, POB 541, FIN-33101 Tampere, Finland. RI Puhakka, Jaakko/G-4220-2014 NR 34 TC 8 Z9 10 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0923-9820 J9 BIODEGRADATION JI Biodegradation PD JUN PY 2003 VL 14 IS 3 BP 219 EP 227 DI 10.1023/A:1024347721050 PG 9 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA 690RA UT WOS:000183561600007 PM 12889612 ER PT J AU Houser, JN Bade, DL Cole, JJ Pace, ML AF Houser, JN Bade, DL Cole, JJ Pace, ML TI The dual influences of dissolved organic carbon on hypolimnetic metabolism: organic substrate and photosynthetic reduction SO BIOGEOCHEMISTRY LA English DT Article DE allochthonous carbon; carbon budget; dissolved organic carbon; hypolimnion; metabolism; methane production; water color ID INORGANIC CARBON; FRESH-WATER; VERTICAL DIFFUSION; OXYGEN-CONSUMPTION; NORTHERN WISCONSIN; STRATIFIED LAKE; ONTARIO LAKES; HUMIC CONTENT; SHIELD LAKES; MATTER AB We investigated the effect of dissolved organic carbon (DOC) on hypolimnetic metabolism (accumulation of dissolved inorganic carbon (DIC) and methane (CH4)) in 21 lakes across a gradient of DOC concentrations (308 to 1540 mumol C L-1). The highly colored nature of the DOC in these lakes suggests it is mostly of terrestrial origin. Hypolimnetic methane accumulation was positively correlated with epilimnetic DOC concentration (Spearman rank correlation = 0.67; p < 0.01), an indicator of allochthonous DOC inputs, but not with photic zone chlorophyll a concentration (Spearman rank correlation = 0.30; p = 0.22). Hypolimnetic DOC concentrations declined in 19 of 21 lakes during the stratified period at rates that ranged from 0.06 to 53.9 mmol m(-2) d(-1). The hypolimnetic accumulation of DIC + CH4 was positively correlated with, and, in most cases of comparable magnitude to, this DOC decline suggesting that DOC was an important substrate for hypolimnetic metabolism. The percentage of surface irradiance reaching the thermocline was lower in high DOC lakes (&SIM;0.3%) than in low DOC lakes (&SIM;6%), reducing hypolimnetic photosynthesis (as measured by the depth and magnitude of the deep dissolved oxygen maxima) in the high DOC lakes. In June, the hypolimnia of lakes with < 400 mumol L-1 DOC had high concentrations of dissolved oxygen and no CH4, while the hypolimnia of lakes with DOC > 800 mumol L-1 were completely anoxic and often had high CH4 concentrations. Thus, DOC affects hypolimnetic metabolism via multiple pathways: DOC was significant in supporting hypolimnetic metabolism; and at high concentrations depressed photosynthesis (and therefore oxygen production and DIC consumption) in the hypolimnion. C1 Univ Wisconsin, Ctr Limnol, Madison, WI 53706 USA. Inst Ecosyst Studies, Millbrook, NY 12545 USA. RP Houser, JN (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Bldg 1505,POB 2008, Oak Ridge, TN 37831 USA. OI Houser, Jeffrey/0000-0003-3295-3132; Pace, Michael/0000-0001-5945-6131 NR 70 TC 31 Z9 34 U1 2 U2 16 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0168-2563 J9 BIOGEOCHEMISTRY JI Biogeochemistry PD JUN-JUL PY 2003 VL 64 IS 2 BP 247 EP 269 DI 10.1023/A:1024933931691 PG 23 WC Environmental Sciences; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Geology GA 705UU UT WOS:000184414400006 ER PT J AU He, W Gonsalves, KE Batina, N Poker, DB Alexander, E Hudson, M AF He, W Gonsalves, KE Batina, N Poker, DB Alexander, E Hudson, M TI Micro/nanomachining of polymer surface for promoting Osteoblast cell adhesion SO BIOMEDICAL MICRODEVICES LA English DT Article DE bone tissue engineering; ion implantation; polymers osteoblast cells; micromachining ID ION-IMPLANTED TITANIUM; BONE; BIOMATERIALS; PROLIFERATION; MIGRATION; ROUGHNESS; BEHAVIOR; RAT; F+ AB Interactions between cells and biomaterials are affected by surface properties. Therefore, various approaches have been introduced for surface modifications. Here a technique based on ion beam lithography to improve osteoblast cell adhesion on polymeric materials is reported. We have demonstrated that exposing the polymer to P+ or Ar+ ions through masks can generate micro/ nano-scale patterns. Our results illustrate that after exposure to an ion beam, the amount of osteoblast cells attached to the polymer was enhanced as a consequence of the roughened surface as well as due to the implanted ions. This indicates that masked ion beam lithography (MIBL) can not only generate nanostructures on the surface of a biocompatible polymer, but can also selectively modify the surface chemistry by implanting with specific ions. These factors can contribute to an osteogenic environment. C1 Univ N Carolina, Dept Chem, Charlotte, NC 28223 USA. Univ N Carolina, Cameron Appl Res Ctr, Charlotte, NC 28223 USA. Univ Connecticut, Dept Chem, Storrs, CT USA. Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico. Oak Ridge Natl Lab, Oak Ridge, TN USA. Univ N Carolina, Dept Biol, Charlotte, NC 28223 USA. RP Univ N Carolina, Dept Chem, Charlotte, NC 28223 USA. EM kegonsal@email.uncc.edu RI He, Wei/K-7218-2013 NR 40 TC 21 Z9 22 U1 1 U2 7 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 1387-2176 EI 1572-8781 J9 BIOMED MICRODEVICES JI Biomed. Microdevices PD JUN PY 2003 VL 5 IS 2 BP 101 EP 108 DI 10.1023/A:1024531010086 PG 8 WC Engineering, Biomedical; Nanoscience & Nanotechnology SC Engineering; Science & Technology - Other Topics GA 696TQ UT WOS:000183903900002 ER PT J AU Weiss, TM Chen, PJ Sinn, H Alp, EE Chen, SH Huang, HW AF Weiss, TM Chen, PJ Sinn, H Alp, EE Chen, SH Huang, HW TI Collective chain dynamics in lipid bilayers by inelastic X-ray scattering SO BIOPHYSICAL JOURNAL LA English DT Article ID MEV ENERGY RESOLUTION; PHOSPHOLIPID-BILAYERS; NEUTRON-SCATTERING; MOLECULAR-DYNAMICS; WATER TRANSPORT; LIQUID ARGON; MEMBRANE; PERMEABILITY; CHOLESTEROL; DIFFRACTION AB We investigated the application of inelastic x-ray scattering (IXS) to lipid bilayers. This technique directly measures the dynamic structure factor S(q,omega) which is the space-time Fourier transform of the electron density correlation function of the measured system. For a multiatomic system, the analysis of S(q,omega) is usually complicated. But for multiple bilayers of lipid, S(q,w) is dominated by chain-chain correlations within individual bilayers. Thus IXS provides a unique probe for the collective dynamics of lipid chains in a bilayer that cannot be obtained by any other method. IXS of dimyristoyl phosphatidylcholine and dimyristoyl phosphatidylcholine + cholesterol at two different concentrations were measured. S(q,omega) was analyzed by three-mode hydrodynamic equations, including a thermal diffusive mode and two propagating acoustic modes. We obtained the dispersion curves for the phonons that represent the collective in-plane excitations of lipid chains. The effect of cholesterol on chain dynamics was detected. Our analysis shows the importance of having a high instrument resolution as well as the requirement of sufficient signal-to-noise ratio to obtain meaningful results from such an IXS experiment. The requirement on signal-to-noise also applies to molecular dynamics simulations. C1 Rice Univ, Dept Phys & Astron, Houston, TX 77251 USA. MIT, Dept Nucl Engn, Cambridge, MA 02139 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Huang, HW (reprint author), Rice Univ, Dept Phys & Astron, Houston, TX 77251 USA. FU NCRR NIH HHS [RR14812, R01 RR014812]; NIGMS NIH HHS [GM55203, R01 GM055203] NR 43 TC 24 Z9 26 U1 0 U2 2 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD JUN PY 2003 VL 84 IS 6 BP 3767 EP 3776 PG 10 WC Biophysics SC Biophysics GA 683CL UT WOS:000183129800023 PM 12770883 ER PT J AU Maness, SJ Franzen, S Gibbs, AC Causgrove, TP Dyer, RB AF Maness, SJ Franzen, S Gibbs, AC Causgrove, TP Dyer, RB TI Nanosecond temperature jump relaxation dynamics of cyclic beta-hairpin peptides SO BIOPHYSICAL JOURNAL LA English DT Article ID FAST EVENTS; GRAMICIDIN-S; PROTEIN; KINETICS; SHEET; DESIGN; WATER; SPECTROSCOPY; STABILITY; MECHANISM AB The thermal unfolding of a series of 6-, 10-, and 14-mer cyclic beta-hairpin peptides was studied to gain insight into the mechanism of formation of this important secondary structure. The thermodynamics of the transition were characterized using temperature dependent Fourier transform infrared spectroscopy. Thermodynamic data were analyzed using a two-state model which indicates increasing cooperativity along the series. The relaxation kinetics of the peptides in response to a laser induced temperature jump were probed using time-resolved infrared spectroscopy. Single exponential relaxation kinetics were observed and fit with a two-state model. The folding rate determined for these cyclic peptides is accelerated by some two orders of magnitude over the rate of a linear peptide that forms a beta-hairpin. This observation supports the argument that the rate limiting step in the linear system is either stabilization of compact collapsed structures or rearrangement of collapsed structures over a barrier to achieve the native interstrand registry. Small activation energies for folding of these peptides obtained from an Arrhenius analysis of the rates imply a primarily entropic barrier, hence an organized transition state having specific stabilizing interactions. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA. Univ Alberta, Fac Pharm & Pharmaceut Sci, Edmonton, AB T6G 2N8, Canada. Mississippi Univ Women, Div Sci & Math, Columbus, MS 39701 USA. RP Dyer, RB (reprint author), Los Alamos Natl Lab, Biosci Div, MS J586, Los Alamos, NM 87545 USA. FU NIGMS NIH HHS [GM 53640, R01 GM053640] NR 41 TC 38 Z9 38 U1 0 U2 8 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD JUN PY 2003 VL 84 IS 6 BP 3874 EP 3882 PG 9 WC Biophysics SC Biophysics GA 683CL UT WOS:000183129800033 PM 12770893 ER PT J AU Baccam, M Huberman, E AF Baccam, M Huberman, E TI Bacterial IMPDH gene used for the selection of mammalian cell transfectants SO BIOTECHNIQUES LA English DT Article ID INOSINE 5'-MONOPHOSPHATE DEHYDROGENASE; MYCOPHENOLIC-ACID; EXPRESSION; AMPLIFICATION; MARKERS; DIFFERENTIATION; PROLIFERATION; PURIFICATION; INHIBITION; RESISTANCE AB Stable cell transfection is used for the expression of exogenous genes or cDNAs in eukaryotic cells. Selection of these transfectants requires a dominant selectable marker. A variety of such markers has been identified and is currently in use. However, many of these are not suitable for all cell types or require unique conditions. Here we describe a simple and versatile dominant selectable marker that involves bacterial IMP dehydrogenase (IMPDH), an enzyme essential for the replication of mammalian and bacterial cells. Although IMPDH is evolutionarily conserved, the bacterial enzyme is orders of magnitude more resistant to the toxic effect of the drug mycophenolic acid, which is an IMPDH inhibitor We have demonstrated that transfection of human, monkey or Chinese hamster cell lines with an expression vector containing bacterial IMPDH and mycophenolic acid treatment resulted in the selection of colonies with a strikingly increased resistance to mycophenolic. acid toxicity. Analysis of cells derived from these colonies indicated that the acquisition of this resistance was associated with bacterial IMPDH protein expression. As a proof of principle, we showed that mammalian cell transfection with a bicistronic IMPDH/GFP expression vector and mycophenolic acid treatment can be used to successfully select transfectants that express the fluorescent protein. These results indicate that bacterial IMPDH is a practical dominant selectable marker that can be used for the selection of transfectants that express exogenous genes or cDNAs in mammalian cells. C1 Argonne Natl Lab, Biochip Technol Ctr, Gene Express & Funct Grp, Argonne, IL 60439 USA. RP Huberman, E (reprint author), Argonne Natl Lab, Biochip Technol Ctr, Gene Express & Funct Grp, 9700 S Cass Ave, Argonne, IL 60439 USA. FU NCI NIH HHS [CA80826] NR 32 TC 1 Z9 1 U1 0 U2 0 PU EATON PUBLISHING CO PI NATICK PA 154 E. CENTRAL ST, NATICK, MA 01760 USA SN 0736-6205 J9 BIOTECHNIQUES JI Biotechniques PD JUN PY 2003 VL 34 IS 6 BP 1220 EP + PG 6 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 688JB UT WOS:000183429700017 PM 12813890 ER PT J AU Lyness, JN Joe, S AF Lyness, JN Joe, S TI The number of lattice rules of specified upper class and rank SO BIT LA English DT Article DE Lattice rules; upper class; rank of lattice rule; Sylow p-decomposition ID CANONICAL-FORMS AB The upper class of a lattice rule is a convenient entity for classification and other purposes. The rank of a lattice rule is a basic characteristic, also used for classification. By introducing a rank proportionality factor and obtaining certain recurrence relations, we show how many lattice rules of each rank exist in any prime upper class. The Sylow p-decomposition may be used to obtain corresponding results for any upper class. C1 Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. Univ New S Wales, Sch Math, Sydney, NSW 2052, Australia. Univ Waikato, Dept Math, Hamilton, New Zealand. RP Lyness, JN (reprint author), Argonne Natl Lab, Div Math & Comp Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. OI Joe, Stephen/0000-0002-7652-9205 NR 11 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0006-3835 J9 BIT JI Bit PD JUN PY 2003 VL 43 IS 2 BP 413 EP 426 DI 10.1023/A:1026048021823 PG 14 WC Computer Science, Software Engineering; Mathematics, Applied SC Computer Science; Mathematics GA 755EQ UT WOS:000187391100010 ER PT J AU Sewards, TV Sewards, MA AF Sewards, TV Sewards, MA TI Input and output stations of the entorhinal cortex: superficial vs. deep layers or lateral vs. medial divisions? SO BRAIN RESEARCH REVIEWS LA English DT Review DE entorhinal cortex; hippocampus; subiculum; perirhinal cortex; visual processing; olfactory processing; epilepsy ID TEMPORAL-LOBE EPILEPSY; PHASEOLUS-VULGARIS-LEUKOAGGLUTININ; PREFERENTIAL NEURONAL LOSS; PERFORANT PATH; DENTATE GYRUS; TOPOGRAPHIC ORGANIZATION; HIPPOCAMPAL-FORMATION; PERIRHINAL CORTEX; MACAQUE MONKEY; OLFACTORY-BULB AB Based on the results of recent electrophysiological and anatomical studies, we argue that the classical division of the entorhinal cortex (EC) into a superficial layer input station and deep layer output station is no longer tenable. We point out that the anatomical data suggest that the medial and lateral divisions of EC are separate, and recent studies of the propagation of signals originating in the lateral olfactory tract and perirhinal cortex to the EC [J. Neurophysiol. 83 (2000) 1924-1931; Biella and de Curtis, 2000] indicate that the lateral division is the input station, and the medial division the output station for information processed in the hippocampus and subiculum. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Sandia Res Ctr, Placitas, NM 87043 USA. RP Sewards, TV (reprint author), Sandia Res Ctr, 21 Perdiz Canyon Rd, Placitas, NM 87043 USA. NR 87 TC 38 Z9 39 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0165-0173 J9 BRAIN RES REV JI Brain Res. Rev. PD JUN PY 2003 VL 42 IS 3 BP 243 EP 251 DI 10.1016/S0165-0173(03)00175-9 PG 9 WC Neurosciences SC Neurosciences & Neurology GA 697JE UT WOS:000183938400004 PM 12791442 ER PT J AU Krasnitz, A Nara, Y Venugopalan, R AF Krasnitz, A Nara, Y Venugopalan, R TI Probing a color glass condensate in high energy heavy ion collisions SO BRAZILIAN JOURNAL OF PHYSICS LA English DT Article; Proceedings Paper CT 25th Workshop on Nuclear Physics CY AUG 31-SEP 04, 2002 CL SAO PEDRO, BRAZIL ID ULTRARELATIVISTIC NUCLEAR COLLISIONS; CLASSICAL GLUON RADIATION; SMALL-X; RENORMALIZATION-GROUP; ELLIPTIC FLOW; BFKL EQUATION; QCD; THERMALIZATION; DISTRIBUTIONS; POMERON AB At very high energies, the partons in the nuclear wavefunction form a color glass condensate. Since the occupation number of partons in the color glass condensate is large, classical methods can be used to compute multi-particle production in the initial instants of a high energy heavy ion collision. Non-perturbative expressions are derived relating the distributions of produced partons to those of wee partons in the wavefunctions of the colliding nuclei. The time evolution of components of the stress-energy tensor is studied and the impact parameter dependence of elliptic flow is extracted. We discuss the space-time picture that emerges and interpret the RHIC data within this framework. C1 Univ Algarve, CENTRA, P-8000 Faro, Portugal. Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. RP Univ Algarve, CENTRA, Campus Gambelas, P-8000 Faro, Portugal. NR 59 TC 5 Z9 5 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0103-9733 EI 1678-4448 J9 BRAZ J PHYS JI Braz. J. Phys. PD JUN PY 2003 VL 33 IS 2 BP 223 EP 230 PG 8 WC Physics, Multidisciplinary SC Physics GA 757QK UT WOS:000187572800010 ER PT J AU Helguero, LA Viegas, M Asaithamby, A Shyamala, G Lanari, C Molinolo, AA AF Helguero, LA Viegas, M Asaithamby, A Shyamala, G Lanari, C Molinolo, AA TI Progesterone receptor expression in medroxyprogesterone acetate-induced murine mammary carcinomas and response to endocrine treatment SO BREAST CANCER RESEARCH AND TREATMENT LA English DT Article DE hormone dependence; hormone response; immunohistochemistry; mammary carcinomas; mice; progesterone receptor isoforms; western blot ID HUMAN-BREAST-CANCER; BALB/C FEMALE MICE; ESTROGEN-RECEPTOR; DEVELOPMENTAL REGULATION; HORMONE DEPENDENCE; B-ISOFORM; A-FORM; GROWTH; ADENOCARCINOMAS; ESTRADIOL AB Using medroxyprogesterone acetate (MPA) as a carcinogen, we were able to induce in BALB/c female mice, several progestin-dependent mammary ductal carcinomas that regress completely with estrogen or antiprogestins and are maintained by serial transplantations in syngeneic mice. Progestin-independent variants were subsequently generated or appeared spontaneously. Based on their response to estrogen or antiprogestins, we subdivided them into responsive progestin-independent (R-PI) variants which regress completely and unresponsive progestin-independent (UR-PI) carcinomas which are resistant to both families of compounds. In this study we have investigated progesterone receptor (PR) expression in six responsive progestin-dependent, six R-PI, and three UR-PI tumors. Progestin-dependent and R-PI tumors disclosed a higher expression of the PRA isoform as compared with PRB, as well as an additional band of 78 kDa that was not detected in uterine tissue; all were down-regulated by progestins. UR-PI tumors expressed lower levels of all bands in western blots, but were highly reactive by immunohistochemistry. PR RNA expression was detected in both, UR-PI and R-PI tumors. PR binding was comparable in progestin-dependent and R-PI tumors. In the three UR-PI tumors, only 29/61 (48%) of the samples evaluated showed low binding levels, the rest were negative. This report is the first to describe in an experimental model of breast cancer the expression of PR isoforms and their distribution. Our results suggest the expression of functionally altered isoforms in a subgroup of mammary carcinomas, which may explain their lack of hormone response. C1 Consejo Nacl Invest Cient & Tecn, Inst Biol & Med Expt, Lab Carcinogenesis Hormonal, RA-1033 Buenos Aires, DF, Argentina. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Molinolo, AA (reprint author), Consejo Nacl Invest Cient & Tecn, Inst Biol & Med Expt, Lab Carcinogenesis Hormonal, Vuelta Obligado 2490,C1428ADN, RA-1033 Buenos Aires, DF, Argentina. RI Helguero, Luisa/B-1221-2013 OI Helguero, Luisa/0000-0001-8237-2390 FU NCI NIH HHS [CA66541] NR 48 TC 24 Z9 24 U1 0 U2 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-6806 J9 BREAST CANCER RES TR JI Breast Cancer Res. Treat. PD JUN PY 2003 VL 79 IS 3 BP 379 EP 390 DI 10.1023/A:1024029826248 PG 12 WC Oncology SC Oncology GA 686KU UT WOS:000183321600010 PM 12846422 ER PT J AU Stump, BW Pearson, DC Hsu, V AF Stump, BW Pearson, DC Hsu, V TI Source scaling of contained chemical explosions as constrained by regional seismograms SO BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA LA English DT Article ID WESTERN UNITED-STATES; UNDERGROUND NUCLEAR DETONATIONS; WAVE-PROPAGATION; HETEROGENEITY; MAGNITUDE AB Quantification of source coupling and characterization parameters for contained, single-fired chemical explosions observed at a regional seismic array are quantified. The explosions were conducted in a mine in northeast Wyoming where delay-fired explosions occur regularly. The primary observational data sets consist of close-in measurements in the mine and regional observations at the International Monitoring System Primary array at Pinedale, Wyoming (PDAR). The single-fired explosions ranged in size from 5500 to 50,000 lb and were separated from one another from 30 rn to over 4 km. Peak amplitude measures at a single element of the regional array are well matched with a power law dependence on explosive weight. Similar scaling constants were determined for each of the dominant regional phases: P-n, 0.84 +/- 0.14; P-g 0.84 +/- 0.09; and L-g, 0.91 +/- 0.08. Peak amplitudes across PDAR show a factor of 3 variation for an individual explosion across all array elements. This amplitude variation is accompanied by a decrease in spatial correlation with increasing station separation indicating the importance of near-receiver structure. The regional signals were further characterized by computing frequency-dependent envelope functions at each array element. Consistent source scaling factors at a single array element were obtained from the envelope functions. A high degree of spatial variability as a function of frequency was documented for the envelope functions. Spectral ratios are used to investigate source scaling relations for the different explosions. Four similarly prepared shots with total explosive weights between 5500 and 6000 lb were detonated to investigate source repeatability. Spectral ratio analysis identified two of the four shots as only partially detonating, resulting in a reduction of long-period spectral level by factors of 10 and 50. These long-period reductions were accompanied by increases in source corner frequency, consistent with a smaller source size. Spectral ratios of waveforms from the larger explosions that fully detonated illustrate that P-g and L-g source functions are similar. The empirical source ratio is well modeled with a Mueller-Murphy source model. These experiments and the resulting data analysis suggest that simple, single-fired explosions of modest explosive weight can be used to calibrate regional seismic arrays, networks, and individual stations. C1 So Methodist Univ, Dallas, TX 75275 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Stump, BW (reprint author), So Methodist Univ, Dallas, TX 75275 USA. NR 24 TC 6 Z9 6 U1 0 U2 2 PU SEISMOLOGICAL SOC AMER PI EL CERRITO PA PLAZA PROFESSIONAL BLDG, SUITE 201, EL CERRITO, CA 94530 USA SN 0037-1106 J9 B SEISMOL SOC AM JI Bull. Seismol. Soc. Amer. PD JUN PY 2003 VL 93 IS 3 BP 1212 EP 1225 DI 10.1785/0120020067 PG 14 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 701JZ UT WOS:000184165600017 ER PT J AU Terajima, D Shida, K Takada, N Kasuya, A Rokhsar, D Satoh, N Satake, M Wang, HG AF Terajima, D Shida, K Takada, N Kasuya, A Rokhsar, D Satoh, N Satake, M Wang, HG TI Identification of candidate genes encoding the core components of the cell death machinery in the Ciona intestinalis genome SO CELL DEATH AND DIFFERENTIATION LA English DT Letter ID FAMILY PROTEINS; APOPTOSIS; ACTIVATION; MITOCHONDRIA; INFECTION; CASPASES; ORIGINS C1 H Lee Moffit Canc Ctr & Res Inst, Drug Discovery Program, Tampa, FL 33612 USA. Tohoku Univ, Dept Mol Immunol, Inst Dev Aging & Canc, Aoba Ku, Sendai, Miyagi 9808575, Japan. Tohoku Univ, Ctr Interdisciplinary Res, Aoba Ku, Sendai, Miyagi 9808578, Japan. US DOE, Joint Genome Inst, Walnut Creek, CA 94598 USA. Kyoto Univ, Dept Zool, Grad Sch Sci, Kyoto, Japan. RP Wang, HG (reprint author), H Lee Moffit Canc Ctr & Res Inst, Drug Discovery Program, 12902 Magnolia Dr, Tampa, FL 33612 USA. RI Satoh, Nori/C-4123-2009; Wang, Hong-Gang/A-3018-2015; shida, kazuhito/H-3400-2016 OI shida, kazuhito/0000-0002-2173-2249 NR 24 TC 22 Z9 22 U1 1 U2 4 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 1350-9047 J9 CELL DEATH DIFFER JI Cell Death Differ. PD JUN PY 2003 VL 10 IS 6 BP 749 EP 753 DI 10.1038/sj.cdd.4401223 PG 5 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 686AX UT WOS:000183299200014 PM 12761583 ER PT J AU Finn, JM Goettee, JD Toroczkai, Z Anghel, M Wood, BP AF Finn, JM Goettee, JD Toroczkai, Z Anghel, M Wood, BP TI Estimation of entropies and dimensions by nonlinear symbolic time series analysis SO CHAOS LA English DT Article ID RING CAVITY; ATTRACTOR; DYNAMICS; BEHAVIOR; MAPS AB Symbolic nonlinear time series analysis methods have the potential for analyzing nonlinear data efficiently with low sensitivity to noise. In symbolic nonlinear time series analysis a time series for a fixed delay is partitioned into a small number (called the alphabet size) of cells labeled by symbols, creating a symbolic time series. Symbolic methods involve computing the statistics of words made from the symbolic time series. Specifically, the Shannon entropy of the distribution of possible words for a range of word lengths is computed. The rate of increase of the entropy with word length is the metric (Kolmogorov-Sinai) entropy. Methods of computing the metric entropy for flows as well as for maps are shown. A method of computing the information dimension appropriate to symbolic analysis is proposed. In terms of this formulation, the information dimension is determined by the scaling of entropy as alphabet size is modestly increased, using the information obtained from large word length. We discuss the role of sampling time and the issue of using these methods when there may be no generating partition. (C) 2003 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Finn, JM (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Toroczkai, Zoltan/A-3421-2008 OI Toroczkai, Zoltan/0000-0002-6602-2849 NR 24 TC 13 Z9 15 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 1054-1500 J9 CHAOS JI Chaos PD JUN PY 2003 VL 13 IS 2 BP 444 EP 456 DI 10.1063/1.1555471 PG 13 WC Mathematics, Applied; Physics, Mathematical SC Mathematics; Physics GA 683NY UT WOS:000183156700003 PM 12777107 ER PT J AU Bishop, AR Kalosakas, G Rasmussen, KO Kevrekidis, PG AF Bishop, AR Kalosakas, G Rasmussen, KO Kevrekidis, PG TI Localization in physical systems described by discrete nonlinear Schrodinger-type equations SO CHAOS LA English DT Article ID WAVE-GUIDE ARRAYS; MODE VECTOR SOLITONS; MULTIMODE SOLITONS; BREATHERS; DYNAMICS; THRESHOLDS; MEDIA; POLYACETYLENE; BIFURCATION; EXCITATIONS AB Following a short introduction on localized modes in a model system, namely the discrete nonlinear Schrodinger equation, we present explicit results pertaining to three different physical systems described by similar equations. The applications range from the Raman scattering spectra of a complex electronic material through intrinsic localized vibrational modes, to the manifestation of an abrupt and irreversible delocalizing transition of Bose-Einstein condensates trapped in two-dimensional optical lattices, and to the instabilities of localized modes in coupled arrays of optical waveguides. (C) 2003 American Institute of Physics. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA. RP Bishop, AR (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RI Rasmussen, Kim/B-5464-2009; Kalosakas, George/L-6211-2013 OI Rasmussen, Kim/0000-0002-4029-4723; Kalosakas, George/0000-0001-7763-718X NR 50 TC 7 Z9 7 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1054-1500 J9 CHAOS JI Chaos PD JUN PY 2003 VL 13 IS 2 BP 588 EP 595 DI 10.1063/1.1567651 PG 8 WC Mathematics, Applied; Physics, Mathematical SC Mathematics; Physics GA 683NY UT WOS:000183156700020 PM 12777124 ER PT J AU Smerzi, A Trombettoni, A AF Smerzi, A Trombettoni, A TI Discrete nonlinear dynamics of weakly coupled Bose-Einstein condensates SO CHAOS LA English DT Article ID WAVE-GUIDE ARRAYS; STATISTICAL-MECHANICS; ENERGY LOCALIZATION; DNA DENATURATION; ULTRACOLD ATOMS; TUNNEL ARRAYS; GAS; SUPERFLUID; BREATHERS; LATTICES AB The dynamics of a Bose-Einstein condensate trapped in a periodic potential is governed by a discrete nonlinear equation. The interplay/competition between discreteness (introduced by the lattice) and nonlinearity (due to the interatomic interaction) manifests itself on nontrivial dynamical regimes which disappear in the continuum (translationally invariant) limit, and have been recently observed experimentally. We review some recent efforts on this highly interdisciplinary field, with the goal of stimulating interexchanges among the communities of condensed matter, quantum optics, and nonlinear physics. (C) 2003 American Institute of Physics. C1 Univ Trent, INFM BEC, I-38050 Povo, Italy. Univ Trent, Dipartimento Fis, I-38050 Povo, Italy. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Parma, Ist Nazl Fis Mat, I-43100 Parma, Italy. Univ Parma, Dipartimento Fis, I-43100 Parma, Italy. RP Smerzi, A (reprint author), Univ Trent, INFM BEC, I-38050 Povo, Italy. OI Trombettoni, Andrea/0000-0002-1108-4727 NR 64 TC 27 Z9 27 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1054-1500 J9 CHAOS JI Chaos PD JUN PY 2003 VL 13 IS 2 BP 766 EP 776 DI 10.1063/1.1577271 PG 11 WC Mathematics, Applied; Physics, Mathematical SC Mathematics; Physics GA 683NY UT WOS:000183156700037 PM 12777141 ER PT J AU Kaczmarski, K Gubernak, M Zhou, DM Guiochon, G AF Kaczmarski, K Gubernak, M Zhou, DM Guiochon, G TI Application of the general rate model with the Maxwell-Stefan equations for the prediction of the band profiles of the 1-indanol enantiomers SO CHEMICAL ENGINEERING SCIENCE LA English DT Article DE enantiomeric separations; equilibrium isotherm; kinetic studies; general rate model; Maxwell-Stefan equation; 1-indanol ID CHIRAL STATIONARY PHASES; BOVINE SERUM-ALBUMIN; PERFORMANCE LIQUID-CHROMATOGRAPHY; ANION-EXCHANGE CHROMATOGRAPHY; MASS-TRANSFER; SURFACE-DIFFUSION; PREPARATIVE CHROMATOGRAPHY; CONCENTRATION-DEPENDENCE; ADSORPTION BEHAVIOR; SEPARATION AB The adsorption isotherm data of R- and S-1-indanol and of their racemic mixture on cellulose tribenzoate were measured by frontal analysis. These experimental data were fitted to the single-component and the modified competitive Bilangmuir isotherms. The overloaded elution profiles of bands of the pure enantiomers and of the racemic mixture were calculated for different sample sizes, using the best competitive isotherm model and the General Rate Model of chromatography coupled with the generalized Maxwell-Stefan equation that describes the surface diffusion flux. The calculated and the experimental profiles were found to be in excellent agreement in all cases. The parameters of the model of the mass transfer kinetics were derived from the band profiles obtained for the pure enantiomers. The same values of these parameters give an excellent prediction of the profiles of multicomponent bands. The new model described here allows a satisfactory interpretation of the competitive mass transfer kinetics. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Rzeszow Univ Technol, Fac Chem, PL-35959 Rzeszow, Poland. Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37831 USA. RP Guiochon, G (reprint author), Univ Tennessee, Dept Chem, 552 Buehler Hall, Knoxville, TN 37996 USA. NR 43 TC 19 Z9 19 U1 0 U2 2 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 JUN PY 2003 VL 58 IS 11 BP 2325 EP 2338 DI 10.1016/S0009-2509(03)00096-4 PG 14 WC Engineering, Chemical SC Engineering GA 692RA UT WOS:000183673000012 ER PT J AU Liu, XD Xu, YH Yu, JH Li, Y Zeng, W Chen, C Li, JY Pang, WQ Xu, RR Xu, Y AF Liu, XD Xu, YH Yu, JH Li, Y Zeng, W Chen, C Li, JY Pang, WQ Xu, RR Xu, Y TI Rational design and synthesis aided by data mining (I) - Microporous aluminophosphates with specified structure SO CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE LA Chinese DT Article DE data mining; decision tree; microporous aluminophosphates; rational synthesis; template AB This work presents the data mining research on the synthesis database of microporous aluminophosphates through decision tree. The results show that the organic amine. templates play an important role in the formation of a specified framework. The analysis of decision tree rules presents the defined synthesis conditions for microporous aluminophosphates. We predict the suitable templates for the formation of aluminophosphates with 12-membered ring channel structure in theory. Parts of our results have been supported by computational simulations and further proven by the experiment. C1 Oak Ridge Natl Lab, Prot Informat Grp, Life Sci Div, Oak Ridge, TN 37831 USA. Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130023, Peoples R China. RP Xu, RR (reprint author), Oak Ridge Natl Lab, Prot Informat Grp, Life Sci Div, POB 2008, Oak Ridge, TN 37831 USA. RI Li, Yi/C-1180-2011; yu, jihong/C-1381-2011; Li, Jiyang/O-3056-2013 OI Li, Yi/0000-0002-5222-3674; yu, jihong/0000-0003-1991-2942; NR 15 TC 6 Z9 7 U1 0 U2 3 PU HIGHER EDUCATION PRESS PI BEIJING PA SHATANHOU ST 55, BEIJING 100009, PEOPLES R CHINA SN 0251-0790 J9 CHEM J CHINESE U JI Chem. J. Chin. Univ.-Chin. PD JUN PY 2003 VL 24 IS 6 BP 949 EP 952 PG 4 WC Chemistry, Multidisciplinary SC Chemistry GA 696AU UT WOS:000183863200001 ER PT J AU Marchbank, AR Kirby, E Roberto, FF AF Marchbank, AR Kirby, E Roberto, FF TI The application of biologically mediated leaching methods - A comprehensive review SO CIM BULLETIN LA English DT Article DE leaching methods; metal extraction; mining; base metals concentrates AB The application of biologically assisted methods for metal extraction in the mining industry has a long history, but development of modem techniques has been relatively slow. There is, however, a resurgence of interest in the industry with the recent development of methods to successfully treat base metals concentrates. Two major pilot plant programs for treatment of chalcopyrite concentrates have been initiated in the past year and results from one are beginning to be released. This paper provides an overview of methods that have been applied in the past, from the earliest deliberate applications of the technology, through the copper and uranium heap and dump leach applications, the more highly engineered agitated tank leach gold applications and the developments currently taking place in the industry. C1 Bechtel Corp, San Francisco, CA USA. Bechtel Australia, Asia Pacific Reg, Perth, WA, Australia. US DOE, Idaho Natl Engn & Environm Lab, Dept Biotechnol, Idaho Falls, ID USA. RP Marchbank, AR (reprint author), Fluor Canada, Min & Minerals Off, Toronto, ON, Canada. NR 9 TC 0 Z9 1 U1 0 U2 1 PU CANADIAN INST MINING METALLURGY PETROLEUM PI CALGARY PA 101 6TH AVE SW, STE 320, CALGARY, ALBERTA TZP 3P4, CANADA SN 0317-0926 J9 CIM BULL JI CIM Bull. PD JUN-JUL PY 2003 VL 96 IS 1072 BP 143 EP 147 PG 5 WC Metallurgy & Metallurgical Engineering; Mining & Mineral Processing SC Metallurgy & Metallurgical Engineering; Mining & Mineral Processing GA 706FJ UT WOS:000184442600012 ER PT J AU Shang, C Rice, JA Eberl, DD Lin, JS AF Shang, C Rice, JA Eberl, DD Lin, JS TI Measurement of illite particle thickness using a direct Fourier transform of small-angle X-ray scattering data SO CLAYS AND CLAY MINERALS LA English DT Article DE direct Fourier transform; illite; fundamental particle; particle thickness; SAXS ID TRANSMISSION ELECTRON-MICROSCOPY; FUNDAMENTAL PARTICLES; SCHERRER EQUATION; XRD MEASUREMENT; SMECTITE; DIFFRACTION; RECTORITE; CHEMISTRY; SUSPENSIONS; MINERALS AB It has been suggested that interstratified illite-smectite (I-S) minerals are composed of aggregates of fundamental particles. Many attempts have been made to measure the thickness of such fundamental particles, but each of the methods used suffers from its own limitations and uncertainties. Small-angle X-ray scattering (SAXS) can be used to measure the thickness of particles that scatter X-rays coherently. We used SAXS to study suspensions of Na-rectorite and other illites with varying proportions of smectite. The scattering intensity (I) was recorded as a function of the scattering vector, q = (4 pi/lambda) sin(theta/2), where lambda is the X-ray wavelength and theta is the scattering angle. The experimental data were treated with a direct Fourier transform to obtain the pair distance distribution function (PDDF) that was then used to determine the thickness of illite particles. The Guinier and Porod extrapolations were used to obtain the scattering intensity beyond the experimental q, and the effects of such extrapolations on the PDDF were examined. The thickness of independent rectorite particles (used as a reference mineral) is 18.3 Angstrom The SAXS results are compared with those obtained by X-ray diffraction peak broadening methods. It was found that the power-law exponent (alpha) obtained by fitting the data in the region of q = 0.1-0.6 nm(-1) to the power law (I = I(0)q(-alpha)) is a linear function of illite particle thickness. Therefore, illite particle thickness could be predicted by the linear relationship as long as the thickness is within the limit where alpha <4.0. C1 S Dakota State Univ, Dept Chem & Biochem, Brookings, SD 57007 USA. US Geol Survey, Boulder, CO 80303 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Rice, JA (reprint author), S Dakota State Univ, Dept Chem & Biochem, Brookings, SD 57007 USA. EM james_rice@sdstate.edu NR 35 TC 6 Z9 7 U1 1 U2 7 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 JUN PY 2003 VL 51 IS 3 BP 293 EP 300 DI 10.1346/CCMN.2003.0510305 PG 8 WC Chemistry, Physical; Geosciences, Multidisciplinary; Mineralogy; Soil Science SC Chemistry; Geology; Mineralogy; Agriculture GA 688BC UT WOS:000183411500005 ER PT J AU Marland, G Pielke, RA Apps, M Avissar, R Betts, RA Davis, KJ Frumhoff, PC Jackson, ST Joyce, LA Kauppi, P Katzenberger, J MacDicken, KG Neilson, RP Niles, JO Niyogi, DDS Norby, RJ Pena, N Sampson, N Xue, YK AF Marland, G Pielke, RA Apps, M Avissar, R Betts, RA Davis, KJ Frumhoff, PC Jackson, ST Joyce, LA Kauppi, P Katzenberger, J MacDicken, KG Neilson, RP Niles, JO Niyogi, DDS Norby, RJ Pena, N Sampson, N Xue, YK TI The climatic impacts of land surface change and carbon management, and the implications for climate-change mitigation policy SO CLIMATE POLICY LA English DT Article DE climate change; carbon sequestration; land use change; land surface change; surface energy balance ID AMAZONIAN DEFORESTATION; REGIONAL CLIMATE; CIRCULATION; LANDSCAPE; VEGETATION AB Strategies to mitigate anthropogenic climate change recognize that carbon sequestration in the terrestrial biosphere can reduce the build-up of carbon dioxide in the Earth's atmosphere. However, climate mitigation policies do not generally incorporate the effects of these changes in the land surface on the surface albedo, the fluxes of sensible and latent heat to the atmosphere, and the distribution of energy within the climate system. Changes in these components of the surface energy budget can affect the local, regional, and global climate. Given the goal of mitigating climate change, it is important to consider all of the effects of changes in terrestrial vegetation and to work toward a better understanding of the full climate system. Acknowledging the importance of land surface change as a component of climate change makes it more challenging to create a system of credits and debits wherein emission or sequestration of carbon in the biosphere is equated with emission of carbon from fossil fuels. Recognition of the complexity of human-caused changes in climate does not, however, weaken the importance of actions that would seek to minimize our disturbance of the Earth's environmental system and that would reduce societal and ecological vulnerability to environmental change and variability. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA. Natl Res Council Canada, Canadian Forestry Serv, Victoria, BC V8X 4M6, Canada. Duke Univ, Dept Civil & Environm Engn, Durham, NC 27710 USA. Meteorol Off, Hadley Ctr Climate Predict, Bracknell RB12 2SZ, Berks, England. Penn State Univ, Dept Meteorol, University Pk, PA 16802 USA. Union Concerned Scientists, Cambridge, MA USA. Univ Wyoming, Dept Bot, Laramie, WY 82071 USA. US Forest Serv, Rocky Mt Res Stn, USDA, Ft Collins, CO USA. Univ Helsinki, FIN-00014 Helsinki, Finland. Aspen Global Change Inst, Aspendale, Vic, Australia. Riau Forestry, Forestry Res & Dev, Riau, Indonesia. US Forest Serv, USDA, Corvallis, OR 97331 USA. Univ Calif Berkeley, Energy & Resources Grp, Berkeley, CA 94720 USA. N Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC 27695 USA. Pew Ctr Global Climate Change, Arlington, VA USA. Sampson Grp Inc, Arlington, VA USA. Univ Calif Los Angeles, Dept Geog, Los Angeles, CA 90024 USA. RP Marland, G (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Bethel valley Rd, Oak Ridge, TN 37831 USA. RI Pielke, Roger/A-5015-2009; Neilson, Ronald/A-8588-2009 NR 27 TC 112 Z9 114 U1 7 U2 41 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 1469-3062 J9 CLIM POLICY JI Clim. Policy PD JUN PY 2003 VL 3 IS 2 BP 149 EP 157 DI 10.1016/S1469-3062(03)00028-7 PG 9 WC Environmental Studies; Public Administration SC Environmental Sciences & Ecology; Public Administration GA 702JD UT WOS:000184220000004 ER PT J AU Giorgi, F Bi, XQ Qian, Y AF Giorgi, F Bi, XQ Qian, Y TI Indirect vs. direct effects of anthropogenic sulfate on the climate of East Asia as simulated with a regional coupled climate-chemistry/aerosol model SO CLIMATIC CHANGE LA English DT Article ID GENERAL-CIRCULATION MODEL; CLOUD ALBEDO; RADIATIVE-TRANSFER; EFFECTIVE RADIUS; OZONE POLLUTION; SOOT AEROSOLS; CROP YIELDS; CHINA; SENSITIVITY; VARIABILITY AB We intercompare a series of multi-year simulations with a coupled regional chemistryclimate model for east Asia to assess the relative importance of direct and indirect (Type I) effects of anthropogenic sulfate on the climate of the region. Both direct and indirect aerosol effects induce a negative radiative forcing that results in a cooling of the surface and in a decrease of precipitation. Under present day sulfur emissions, the direct aerosol effects prevail during the cold season, while the indirect effects dominate in the warm season (when cloudiness is maximum over the region). When both the direct and indirect effects are included, the surface cooling varies in the range of -0.1 to over -1 K throughout the region and extended areas of statistically significant cooling are found in all seasons except winter. The indirect effects largely dominate in inhibiting precipitation, especially during the summer. When doubling the sulfur emissions, the direct effects are substantially strengthened, while the indirect effects are only marginally affected. This indicates that the indirect effects over the region might be asymptotically approaching their maximum efficiency. Overall, the indirect effects appear necessary to explain the observed temperature record over some regions of China, at least in the warm season. A number of uncertainties need to be addressed, such as due to Type II indirect effects, modeling of the relationship between aerosol concentration and cloud optical properties, and contribution of aerosols other than anthropogenic sulfate. C1 Abdus Salam Int Ctr Theoret Phys, Trieste, Italy. Pacific NW Natl Lab, Richland, WA USA. RP Giorgi, F (reprint author), Abdus Salam Int Ctr Theoret Phys, Trieste, Italy. RI qian, yun/A-5056-2010; qian, yun/E-1845-2011; Giorgi, Filippo/C-3169-2013 NR 44 TC 80 Z9 94 U1 2 U2 21 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0165-0009 EI 1573-1480 J9 CLIMATIC CHANGE JI Clim. Change PD JUN PY 2003 VL 58 IS 3 BP 345 EP 376 DI 10.1023/A:1023946010350 PG 32 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 682VD UT WOS:000183112300006 ER PT J AU Heinstein, MW Laursen, TA AF Heinstein, MW Laursen, TA TI A three dimensional surface-to-surface projection algorithm for non-coincident domains SO COMMUNICATIONS IN NUMERICAL METHODS IN ENGINEERING LA English DT Article DE mortar projection; mesh tying; large deformations; contact mechanics ID CONTACT PROBLEMS; FORMULATION AB A numerical procedure is outlined to achieve the least squares projection of a finite dimensional representation from one surface to another in three dimensions. Although the applications of such an algorithm are many, the specific problem considered is the mortar tying of dissimilarly meshed grids in large deformation solid mechanics. The algorithm includes a nearest neighbour search, a systematic subdivision of the surface of intersection into smooth subdomains (termed segments), and a robust numerical quadrature scheme for evaluation of the spatial integrals defining the mortar projection. The procedure outlined, while discussed for the mesh tying problem, is directly applicable to the study of contact-impact. Published in 2003 by John Wiley Sons, Ltd. C1 Sandia Natl Labs, Computat Solid Mech & Struct Dynam Dept, Albuquerque, NM 87185 USA. Duke Univ, Dept Civil & Environm Engn, Computat Mech Lab, Durham, NC 27708 USA. RP Laursen, TA (reprint author), Duke Univ, Dept Civil Engn, Durham, NC 27706 USA. OI Laursen, Tod/0000-0003-4704-7730 NR 7 TC 10 Z9 10 U1 0 U2 1 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 1069-8299 J9 COMMUN NUMER METH EN JI Commun. Numer. Methods Eng. PD JUN PY 2003 VL 19 IS 6 BP 421 EP 432 DI 10.1002/cnm.601 PG 12 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications SC Engineering; Mathematics GA 691AK UT WOS:000183582500002 ER PT J AU Martin, JE Anderson, RA Williamson, RL AF Martin, JE Anderson, RA Williamson, RL TI Generating strange interactions in particle suspensions SO COMPOSITES SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT Spring Meeting of the European-Materials-Research-Society (E-MRS) CY JUN 18-21, 2002 CL STRASBOURG, FRANCE SP European Mat Res Soc DE magnetic particles; field-structured composites ID FIELD-STRUCTURED COMPOSITES; BIAXIAL FIELD; SIMULATION; BEHAVIOR; MATRIX AB When a soft magnetic particle suspension is subjected to a vertical uniaxial magnetic field the particles polarize, the positive dipolar interactions causing particle chain formation. If instead an audio-frequency rotating magnetic field is applied in a horizontal plane, the particles experience an average interaction that to first order is a negative dipolar interaction, causing particle sheet formation in the biaxial field plane. When a vertical unaixial field and a horizontal biaxial field are simultaneously applied with the field amplitudes balanced, the positive and negative dipolar interactions cancel to first order, and one might expect no dipolar interactions at all. But in this balanced triaxial field an isotropic second-order dipolar interaction of surprising magnitude remains. This classical triaxial interaction can be attractive or repulsive, and exhibits strong many-body interactions that lead to a variety of unexpected effects, including stable clusters with molecular geometries, the emergence of a particle foam, and the production of vortices in the fluid. By manipulating the triaxial field, a variety of particle structures can be made that cannot be produced by any other known means. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Martin, JE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 18 TC 7 Z9 7 U1 0 U2 4 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0266-3538 J9 COMPOS SCI TECHNOL JI Compos. Sci. Technol. PD JUN PY 2003 VL 63 IS 8 BP 1097 EP 1103 DI 10.1016/S0266-3538(03)00030-7 PG 7 WC Materials Science, Composites SC Materials Science GA 676FA UT WOS:000182739600003 ER PT J AU Adiga, PSU AF Adiga, PSU TI Segmentation of volumetric tissue images using constrained active contour models SO COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE LA English DT Article DE confocal microscopy; histo-pathology; active contour; 3D image; segmentation AB In this article we describe an application of active contour model for the segmentation of 3D histo-pathological images. The 3D images of a thick tissue specimen are obtained as a stack of optical sections using confocal laser beam scanning microscope (CLSM). We have applied noise reduction and feature enhancement methods so that a smooth and slowly varying potential surface is obtained for proper convergence. To increase the capture range of the potential surface, we use a combination of distance potential and the diffused gradient potential as external forces. It has been shown that the region-based information obtained from low-level segmentation can be applied to reduce the adverse influence of the neighbouring nucleus having a strong boundary feature. We have also shown that, by increasing the axial resolution of the image stack, we can automatically propagate the optimum active contour of one image slice to its neighbouring image slices as an appropriate initial model. Results on images of prostate tissue section are presented. (C) 2002 Elsevier Science Ireland Ltd. All rights reserved. C1 Lawrence Berkeley Lab, Bioimaging Grp, Berkeley, CA 94705 USA. RP Adiga, PSU (reprint author), Lawrence Berkeley Lab, Bioimaging Grp, MS 84-171,1 Cyclotron Rd, Berkeley, CA 94705 USA. EM upadiga@lbl.gov NR 24 TC 7 Z9 7 U1 0 U2 2 PU ELSEVIER IRELAND LTD PI CLARE PA ELSEVIER HOUSE, BROOKVALE PLAZA, EAST PARK SHANNON, CO, CLARE, 00000, IRELAND SN 0169-2607 EI 1872-7565 J9 COMPUT METH PROG BIO JI Comput. Meth. Programs Biomed. PD JUN PY 2003 VL 71 IS 2 BP 91 EP 104 AR PII S0169-2607(02)00059-7 PG 14 WC Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods; Engineering, Biomedical; Medical Informatics SC Computer Science; Engineering; Medical Informatics GA 688KX UT WOS:000183435000001 PM 12758131 ER PT J AU Jeong, JH Jhon, MS Halow, JS van Osdol, J AF Jeong, JH Jhon, MS Halow, JS van Osdol, J TI Smoothed particle hydrodynamics: Applications to heat conduction SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article DE smoothed particle hydrodynamics; heat conduction; boundary conditions ID SIMULATION; FLOW; SPH AB In this paper, we modify the numerical steps involved in a smoothed particle hydrodynamics (SPH) simulation. Specifically, the second order partial differential equation (PDE) is decomposed into two first order PDEs. Using the ghost particle method, consistent estimation of near-boundary corrections for system variables is also accomplished. Here, we focus on SPH equations for heat conduction to verify our numerical scheme. Each particle carries a physical entity (here, this entity is temperature) and transfers it to neighboring particles, thus exhibiting the mesh-less nature of the SPH framework, which is potentially applicable to complex geometries and nanoscale heat transfer. We demonstrate here only 1D and 2D simulations because 3D codes are as simple to generate as 1D codes in the SPH framework. Our methodology can be extended to systems where the governing equations are described by PDEs. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. Natl Energy Technol Labs, Morgantown, WV 26507 USA. RP Jhon, MS (reprint author), Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. NR 9 TC 31 Z9 35 U1 2 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD JUN 1 PY 2003 VL 153 IS 1 BP 71 EP 84 DI 10.1016/S0010-4655(03)00155-3 PG 14 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 683VL UT WOS:000183171300007 ER PT J AU Baker, M Katz, DS Gropp, W Sterling, T AF Baker, M Katz, DS Gropp, W Sterling, T TI Special issue: Cluster 2001 SO CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE LA English DT Editorial Material C1 Univ Portsmouth, Portsmouth PO1 2UP, Hants, England. Jet Propuls Lab, Pasadena, CA 91109 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Caltech JPL, Pasadena, CA 91109 USA. RP Baker, M (reprint author), Univ Portsmouth, Portsmouth PO1 2UP, Hants, England. OI Gropp, William/0000-0003-2905-3029; Katz, Daniel S./0000-0001-5934-7525 NR 0 TC 0 Z9 0 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 1532-0626 J9 CONCURR COMP-PRACT E JI Concurr. Comput.-Pract. Exp. PD JUN-JUL PY 2003 VL 15 IS 7-8 BP 623 EP 624 DI 10.1002/cpe.750 PG 2 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA 678ZX UT WOS:000182897500001 ER PT J AU Coll, S Frachtenberg, E Petrini, F Hoisie, A Gurvits, L AF Coll, S Frachtenberg, E Petrini, F Hoisie, A Gurvits, L TI Using multirail networks in high-performance clusters SO CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE LA English DT Article; Proceedings Paper CT International Conference on Cluster Computing (Cluster 2001) CY OCT, 2001 CL NEWPORT BEACH, CALIFORNIA DE communication protocols; high-performance interconnection networks; performance evaluation; routing; communication libraries; parallel architectures AB Using multiple independent networks (also known as rails) is an emerging technique which is being used to overcome bandwidth limitations and enhance fault tolerance of current high-performance parallel computers. In this paper, we present and analyze various algorithms to allocate multiple communication rails, including static and dynamic allocation schemes. An analytical lower bound on the number of rails required for static rail allocation is shown. We also present an extensive experimental comparison of the behavior of various algorithms in terms of bandwidth and latency. We show that striping messages over multiple rails can substantially reduce network latency, depending on average message size, network load and allocation scheme. The methods compared include a static rail allocation, a basic round-robin rail allocation, a local-dynamic allocation based on local knowledge and a dynamic rail allocation that reserves both communication endpoints of a message before sending it. The last method is shown to perform better than the others at higher loads: up to 49% better than local-knowledge allocation and 37% better than the round-robin allocation. This allocation scheme also shows lower latency and it saturates at higher loads (for long enough messages). Most importantly, this proposed allocation scheme scales well with the number of rails and message size. In addition we propose a hybrid algorithm that combines the benefits of the local- dynamic allocation for short messages with those of the dynamic algorithm for large messages. Copyright (C) 2003 John Wiley Sons, Ltd. C1 Los Alamos Natl Lab, Comp & Computat Sci Div, Algorithms & Informat Grp, CCS 3 Modeling, Las Alamos, CA USA. RP Petrini, F (reprint author), Los Alamos Natl Lab, Comp & Computat Sci Div, Algorithms & Informat Grp, CCS 3 Modeling, Las Alamos, CA USA. RI Coll, Salvador/H-4413-2015 OI Coll, Salvador/0000-0002-7795-7252 NR 10 TC 3 Z9 3 U1 1 U2 2 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX PO19 1UD, ENGLAND SN 1532-0626 J9 CONCURR COMP-PRACT E JI Concurr. Comput.-Pract. Exp. PD JUN-JUL PY 2003 VL 15 IS 7-8 BP 625 EP 651 DI 10.1002/cpe.725 PG 27 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA 678ZX UT WOS:000182897500002 ER PT J AU Lashley, JC Hundley, MF Migliori, A Sarrao, JL Pagliuso, PG Darling, TW Jaime, M Cooley, JC Hults, WL Morales, L Thoma, DJ Smith, JL Boerio-Goates, J Woodfield, BF Stewart, GR Fisher, RA Phillips, NE AF Lashley, JC Hundley, MF Migliori, A Sarrao, JL Pagliuso, PG Darling, TW Jaime, M Cooley, JC Hults, WL Morales, L Thoma, DJ Smith, JL Boerio-Goates, J Woodfield, BF Stewart, GR Fisher, RA Phillips, NE TI Critical examination of heat capacity measurements made on a Quantum Design physical property measurement system SO CRYOGENICS LA English DT Article ID HIGH MAGNETIC-FIELDS; LOW-TEMPERATURES; CALORIMETER; COPPER; MICROCALORIMETER; SAMPLES AB We examine the operation and performance of an automated heat-capacity measurement system manufactured by Quantum Design (QD). QD's physical properties measurement system (PPMS) employs a thermal-relaxation calorimeter that operates in the temperature range of 1.8-395 K. The accuracy of the PPMS specific-heat data is determined here by comparing data measured on copper and synthetic sapphire samples with standard literature values. The system exhibits an overall accuracy of better than 1% for temperatures between 100 and 300 K, while the accuracy diminishes at lower temperatures. These data confirm that the system operates within the +/-5% accuracy specified by QD. Measurements on gold samples with masses of 4.5 and 88 mg indicate that accuracy of +/-3% or better can be achieved below 4 K by using samples with heat capacities that are half or greater than the calorimeter addenda heat capacity. The ability of a PPMS calorimeter to accurately measure sharp features in C-p(T) near phase transitions is determined by measuring the specific heat in the vicinity of the first-order antiferromagnetic transition in Sm2IrIn8 (T-0 = 14 K) and the second-order hidden order (HO) transition in URu2Si2 (T-N = 17 K). While the PPMS measures C-p(T) near the second-order transition accurately, it is unable to do so in the vicinity of the first-order transition. We show that the specific heat near a first-order transition can be determined from the PPMS-measured decay curves by using an alternate analytical approach. This correction is required because the latent heat liberated/absorbed at the transition results in temperature-decay curves that cannot be described by a single relaxation time constant. Lastly, we test the ability of the PPMS to measure the specific heat of (MgB2)-B-11, a superconductor of current interest to many research groups, that has an unusually strong field-dependent specific heat in the mixed state. At the critical temperature the discontinuity in the specific heat is nearly 15% lower than measurements made on the same sample using a semi-adiabatic calorimeter at Lawrence Berkeley National Laboratory. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. Brigham Young Univ, Dept Chem & Biochem, Provo, UT 84602 USA. Univ Florida, Dept Phys, Gainesville, FL 32611 USA. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Lashley, JC (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, POB 1663 MST-8,MS G721, Los Alamos, NM 87545 USA. EM j.lash@lanl.gov RI Pagliuso, Pascoal/C-9169-2012; Cooley, Jason/E-4163-2013; Jaime, Marcelo/F-3791-2015 OI Jaime, Marcelo/0000-0001-5360-5220 NR 25 TC 233 Z9 236 U1 6 U2 65 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0011-2275 J9 CRYOGENICS JI Cryogenics PD JUN PY 2003 VL 43 IS 6 BP 369 EP 378 DI 10.1016/S0011-2275(03)00092-4 PG 10 WC Thermodynamics; Physics, Applied SC Thermodynamics; Physics GA 687NH UT WOS:000183382900006 ER PT J AU Zhou, JH AF Zhou, JH TI Microarrays for bacterial detection and microbial community analysis SO CURRENT OPINION IN MICROBIOLOGY LA English DT Review ID 16S RIBOSOMAL-RNA; ESCHERICHIA-COLI K-12; OLIGONUCLEOTIDE MICROARRAYS; GENE-EXPRESSION; DNA MICROARRAYS; HYBRIDIZATION; ENVIRONMENT; MICROCHIPS; DIVERSITY; DYNAMICS AB Several types of microarrays have recently been developed and evaluated for bacterial detection and microbial community analysis. These studies demonstrated that specific, sensitive and quantitative detection could be obtained with both functional gene arrays and community genome arrays. Although single-base mismatch can be differentiated with phylogenetic oligonucleotide arrays, reliable specific detection at the single-base level is still problematic. Microarray-based hybridization approaches are also useful for defining genome diversity and bacterial relatedness. However, more rigorous and systematic assessment and development are needed to realize the full potential of microarrays for microbial detection and community analysis. C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RP Zhou, JH (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA. NR 32 TC 232 Z9 267 U1 4 U2 29 PU CURRENT BIOLOGY LTD PI LONDON PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND SN 1369-5274 J9 CURR OPIN MICROBIOL JI Curr. Opin. Microbiol. PD JUN PY 2003 VL 6 IS 3 BP 288 EP 294 DI 10.1016/S1369-5274(03)00052-3 PG 7 WC Microbiology SC Microbiology GA 699VR UT WOS:000184077100013 PM 12831906 ER PT J AU Salwinski, L Eisenberg, D AF Salwinski, L Eisenberg, D TI Computational methods of analysis of protein-protein interactions SO CURRENT OPINION IN STRUCTURAL BIOLOGY LA English DT Review ID SACCHAROMYCES-CEREVISIAE; FUNCTIONAL ANNOTATION; INTERACTION NETWORKS; METABOLIC NETWORKS; COMPLEX NETWORKS; GENE-EXPRESSION; SCALE DATA; DATABASE; YEAST; IDENTIFICATION AB Computational methods play an important role at all stages of the process of determining protein-protein interactions. They are used to predict potential interactions, to validate the results of high-throughput interaction screens and to analyze the protein networks inferred from interaction databases. C1 Univ Calif Los Angeles, UCLA DOE Inst Genom & Proteom, Howard Hughes Med Inst, Dept Chem & Biochem, Los Angeles, CA 90095 USA. Univ Calif Los Angeles, Inst Mol Biol, Dept Biol Chem, Los Angeles, CA 90095 USA. RP Salwinski, L (reprint author), Univ Calif Los Angeles, UCLA DOE Inst Genom & Proteom, Howard Hughes Med Inst, Dept Chem & Biochem, Box 951570, Los Angeles, CA 90095 USA. NR 57 TC 86 Z9 92 U1 2 U2 8 PU CURRENT BIOLOGY LTD PI LONDON PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND SN 0959-440X J9 CURR OPIN STRUC BIOL JI Curr. Opin. Struct. Biol. PD JUN PY 2003 VL 13 IS 3 BP 377 EP 382 DI 10.1016/S0959-440X(03)00070-8 PG 6 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 700KZ UT WOS:000184112300015 PM 12831890 ER PT J AU Chen, Y Xu, D AF Chen, Y Xu, D TI Computational analyses of high-throughput protein-protein interaction data SO CURRENT PROTEIN & PEPTIDE SCIENCE LA English DT Review DE protein-protein interaction; high-throughput data; yeast two hybrid; protein complex; proteome; bioinformatics ID POST-GENOMIC ERA; SACCHAROMYCES-CEREVISIAE; INTERACTION MAP; FUNCTIONAL GENOMICS; INTERACTION NETWORK; GENE-EXPRESSION; 2-HYBRID SYSTEM; SPLIT-UBIQUITIN; NITRIC-OXIDE; SCALE DATA AB Protein-protein interactions play important roles in nearly all events that take place in a cell. High-throughput experimental techniques enable the study of protein-protein interactions at the proteome scale through systematic identification of physical interactions among all proteins in an organism. High-throughput protein-protein interaction data, with ever-increasing volume, are becoming the foundation for new biological discoveries. A great challenge to bioinformatics is to manage, analyze, and model these data. In this review, we describe several databases that store, query, and visualize protein-protein interaction data. Comparison between experimental techniques shows that each high-throughput technique such as yeast two-hybrid assay or protein complex identification through mass spectrometry has its limitations in detecting certain types of interactions and they are complementary to each other. In silico methods using protein/DNA sequences, domain and structure information to predict protein-protein interaction can expand the scope of experimental data and increase the confidence of certain protein-protein interaction pairs. Protein-protein interaction data correlate with other types of data., including protein function, subcellular location, and gene expression profile. Highly connected proteins are more likely to be essential based on the analyses, of the global architecture of large-scale interaction network in yeast. Use of protein-protein interaction networks, preferably in conjunction with other types of data, allows assignment of cellular functions to novel proteins and derivation of new biological pathways. As demonstrated in our study on the yeast signal transduction pathway for amino acid transport, integration of high-throughput data with traditional biology resources can transform the protein-protein. interaction data from noisy information into knowledge of cellular mechanisms. C1 Oak Ridge Natl Lab, Div Life Sci, Prot Informat Grp, Oak Ridge, TN 37830 USA. Oak Ridge Natl Lab, Grad Sch Genome Sci & Technol, UT, Oak Ridge, TN 37830 USA. RP Oak Ridge Natl Lab, Div Life Sci, Prot Informat Grp, Oak Ridge, TN 37830 USA. EM xud@ornl.gov NR 124 TC 40 Z9 50 U1 0 U2 20 PU BENTHAM SCIENCE PUBL LTD PI SHARJAH PA EXECUTIVE STE Y-2, PO BOX 7917, SAIF ZONE, 1200 BR SHARJAH, U ARAB EMIRATES SN 1389-2037 EI 1875-5550 J9 CURR PROTEIN PEPT SC JI Curr. Protein Pept. Sci. PD JUN PY 2003 VL 4 IS 3 BP 159 EP 180 DI 10.2174/1389203033487225 PG 22 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 678PF UT WOS:000182875100001 PM 12769716 ER PT J AU Satou, Y Imai, KS Levine, M Kohara, Y Rokhsar, D Satoh, N AF Satou, Y Imai, KS Levine, M Kohara, Y Rokhsar, D Satoh, N TI A genomewide survey of developmentally relevant genes in Ciona intestinalis - I. Genes for bHLH transcription factors SO DEVELOPMENT GENES AND EVOLUTION LA English DT Article DE basal chordates; Ciona intestinalis; genes for basic helix-loop-helix proteins; genomewide survey ID PROTEINS; CHORDATE; DATABASE; FAMILY AB The basic helix-loop-helix (bHLH) proteins are transcription factors that play important roles in many biological processes, including the development of various animals. We identified 46 genes encoding bHLH proteins in the draft genome sequence of the basal chordate Ciona intestinalis. These 46 genes represent an almost complete set of bHLH genes in this animal. This number is comparable to 39 and 58 bHLH genes in those of Caenorhabditis elegans and Drosophila melanogaster but is much smaller than the 125 in the human genome. Genes that encode NeuroD, Beta3, Oligo, SCL, NSCL, SRC, Clock and Bmal were not found in the Ciona genome. We could also identify groucho and CBP orthologues in the Ciona genome. In addition, the comparison between the numbers of orthologous human and Ciona bHLH factors reveals the simplicity of the Ciona genome, in accordance with its phylogenetic position within chordates. The present analysis provides an insight into the basic set of bHLH genes that the last common ancestor of ascidians and vertebrates had, and will provide important background information for future studies using ascidians as a model system for vertebrate development. C1 Kyoto Univ, Dept Zool, Grad Sch Sci, Sakyo Ku, Kyoto 6068502, Japan. Univ Calif Berkeley, Dept Mol & Cellular Biol, Div Genet & Dev, Berkeley, CA 94720 USA. Natl Inst Genet, Mishima, Shizuoka 4118540, Japan. US DOE, Joint Genome Inst, Walnut Creek, CA 94598 USA. RP Satou, Y (reprint author), Kyoto Univ, Dept Zool, Grad Sch Sci, Sakyo Ku, Kyoto 6068502, Japan. RI Satoh, Nori/C-4123-2009; Satou, Yutaka/K-7131-2012 OI Satou, Yutaka/0000-0001-5193-0708 NR 16 TC 100 Z9 102 U1 2 U2 6 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0949-944X J9 DEV GENES EVOL JI Dev. Genes Evol. PD JUN PY 2003 VL 213 IS 5-6 BP 213 EP 221 DI 10.1007/s00427-003-0319-7 PG 9 WC Cell Biology; Evolutionary Biology; Developmental Biology SC Cell Biology; Evolutionary Biology; Developmental Biology GA 704HV UT WOS:000184334800002 PM 12736824 ER PT J AU Wada, S Tokuoka, M Shoguchi, E Kobayashi, K Di Gregorio, A Spagnuolo, A Branno, M Kohara, Y Rokhsar, D Levine, M Saiga, H Satoh, N Satou, Y AF Wada, S Tokuoka, M Shoguchi, E Kobayashi, K Di Gregorio, A Spagnuolo, A Branno, M Kohara, Y Rokhsar, D Levine, M Saiga, H Satoh, N Satou, Y TI A genomewide survey of developmentally relevant genes in Ciona intestinalis - II. Genes for homeobox transcription factors SO DEVELOPMENT GENES AND EVOLUTION LA English DT Article DE basal chordates; Ciona intestinalis; genomewide survey; homeobox genes ID COMPARATIVE GENOMICS; HOX CLUSTER; EXPRESSION; EVOLUTION; HOMEODOMAIN; CHORDATE; IDENTIFICATION; ORGANIZATION; DROSOPHILA; PROTEINS AB Homcobox-containing genes play crucial roles in various developmental processes, including body-plan specification, pattern formation and cell-type specification. The present study searched the draft genome sequence and cDNA/EST database of the basal chordate Ciona intestinalis to identify 83 homeobox-containing genes in this animal. This number of homeobox genes in the Ciona genome is smaller than that in the Caenorhabditis elegans, Drosophila melanogaster, human and mouse genomes. Of the 83 genes, 76 have possible human orthologues and 7 may be unique to Ciona. The ascidian homeobox genes were classified into 11 classes, including Hox class, NK class, Paired class, POU class, LIM class, TALE class, SIX class, Prox class, Cut class, ZFH class and HNF1 class, according to the classification scheme devised for known homeobox genes. As to the Hox cluster, the Ciona genome contains single copies of each of the paralogous groups, suggesting that there is a single Hox cluster, if any, but genes orthologous to Hox7, 8, 9 and 11 were not found in the genome. In addition, loss of genes had occurred independently in the Ciona lineage and was noticed in Gbx of the EHGbox subclass, Sax, NK3, Vax and vent of the NK class, Cart, Og9, Anf and Mix of the Paired class, POU-I, III, V and VI of the POU class, Lhx6/7 of the LIM class, TGIF of the TALE class, Cux and SATB of the Cut class, and ZFH1 of the ZFH class, which might have reduced the number of Ciona homeobox genes. Interestingly, one of the newly identified Ciona intestinalis genes and its vertebrate counterparts constitute a novel subclass of HNF1 class homeobox genes. Furthermore, evidence for the gene structures and expression of 54 of the 83 homeobox genes was provided by analysis of ESTs, suggesting that cDNAs for these 54 genes are available. The present data thus reveal the repertoire of homeodomain-containing transcription factors in the Ciona genome, which will be useful for future research on the development and evolution of chordates. C1 Kyoto Univ, Dept Zool, Grad Sch Sci, Sakyo Ku, Kyoto 6068502, Japan. Cornell Univ, Dept Cell & Dev Biol, Weill Med Coll, New York, NY 10021 USA. Staz Zool Anton Dohrn, Biochem & Mol Biol Lab, I-80121 Naples, Italy. Natl Inst Genet, Mishima, Shizuoka 4118540, Japan. US DOE, Joint Genome Inst, Walnut Creek, CA 94598 USA. Univ Calif Berkeley, Dept Mol & Cell Biol, Div Genet & Dev, Berkeley, CA 94720 USA. Tokyo Metropolitan Univ, Dept Biol Sci, Grad Sch Sci, Hachioji, Tokyo 1920397, Japan. RP Satoh, N (reprint author), Kyoto Univ, Dept Zool, Grad Sch Sci, Sakyo Ku, Kyoto 6068502, Japan. EM satoh@ascidian.zool.kyoto-u.ac.jp RI Satoh, Nori/C-4123-2009; Di Gregorio, Anna/C-4766-2008; Satou, Yutaka/K-7131-2012 OI Satou, Yutaka/0000-0001-5193-0708 NR 46 TC 98 Z9 99 U1 1 U2 12 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0949-944X J9 DEV GENES EVOL JI Dev. Genes Evol. PD JUN PY 2003 VL 213 IS 5-6 BP 222 EP 234 DI 10.1007/s00427-003-0321-0 PG 13 WC Cell Biology; Evolutionary Biology; Developmental Biology SC Cell Biology; Evolutionary Biology; Developmental Biology GA 704HV UT WOS:000184334800003 PM 12736825 ER PT J AU Yagi, K Satou, Y Mazet, F Shimeld, SM Degnan, B Rokhsar, D Levine, M Kohara, Y Satoh, N AF Yagi, K Satou, Y Mazet, F Shimeld, SM Degnan, B Rokhsar, D Levine, M Kohara, Y Satoh, N TI A genomewide survey of developmentally relevant genes in Ciona intestinalis - III. Genes for Fox, ETS, nuclear receptors and NF kappa B SO DEVELOPMENT GENES AND EVOLUTION LA English DT Article DE Ciona intestinalis; Fox; ETS; nuclear receptors; NF kappa B ID TRANSCRIPTION FACTOR; DROSOPHILA; FAMILY; DORSAL; EMBRYOS; DIFFERENTIATION; EXPRESSION; CHORDATE; ORIGINS; PATTERN AB A survey against the draft genome sequence and the cDNA/EST database of Ciona intestinalis identified a number of genes encoding transcription factors regulating a variety of processes including development. In the present study, we describe almost complete sets of genes for Fox, ETS-domain transcription factors, nuclear receptors, and NFkappaB as well as other factors regulating NFkappaB activity, with their phylogenetic nature. Vertebrate Fox transcription factors are currently delineated into 17 subfamilies: FoxA to FoxQ. The present survey yielded 29 genes of this family in the Ciona genome, 24 of which were Ciona orthologues of known Fox genes. In addition, we found 15 ETS aenes, 17 nuclear receptor genes, and several NFkappaB signaling pathway genes in the Ciona genome. The number of Ciona genes in each family is much smaller than that of vertebrates, which represents a simplified feature of the ascidian genome. For example, humans have two NFkappaB genes, three Rel genes, and five NFAT genes, while Ciona has one gene for each family. The Ciona genome also contains smaller numbers of genes for the NFkappaB regulatory system, i.e. after the split of ascidians/vertebrates, vertebrates evolved a more complex NFkappaB system. The present results therefore provide molecular information for the investigation of complex developmental processes, and an insight into chordate evolution. C1 Kyoto Univ, Dept Zool, Grad Sch Sci, Sakyo Ku, Kyoto 6068502, Japan. Univ Reading, Sch Anim & Microbial Sci, Reading RG6 6AJ, Berks, England. Univ Queensland, Dept Zool & Entomol, Brisbane, Qld 4072, Australia. US DOE, Joint Genome Inst, Walnut Creek, CA 94598 USA. Univ Calif Berkeley, Dept Mol & Cellular Biol, Div Genet & Dev, Berkeley, CA 94720 USA. Natl Inst Genet, Mishima, Shizuoka 4118540, Japan. RP Satou, Y (reprint author), Kyoto Univ, Dept Zool, Grad Sch Sci, Sakyo Ku, Kyoto 6068502, Japan. RI Satoh, Nori/C-4123-2009; Satou, Yutaka/K-7131-2012; OI Satou, Yutaka/0000-0001-5193-0708; Shimeld, Sebastian/0000-0003-0195-7536 NR 27 TC 95 Z9 97 U1 1 U2 8 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0949-944X J9 DEV GENES EVOL JI Dev. Genes Evol. PD JUN PY 2003 VL 213 IS 5-6 BP 235 EP 244 DI 10.1007/s00427-003-0322-z PG 10 WC Cell Biology; Evolutionary Biology; Developmental Biology SC Cell Biology; Evolutionary Biology; Developmental Biology GA 704HV UT WOS:000184334800004 PM 12743820 ER PT J AU Gatley, SJ Carroll, FI AF Gatley, SJ Carroll, FI TI PET and SPECT in medication development SO DRUG DEVELOPMENT RESEARCH LA English DT Editorial Material ID POSITRON-EMISSION-TOMOGRAPHY; HUMAN BRAIN; DRUG C1 Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. Res Triangle Inst, Res Triangle Pk, NC 27709 USA. RP Gatley, SJ (reprint author), Brookhaven Natl Lab, Dept Med, Bldg 490,30 Bell Ave, Upton, NY 11973 USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0272-4391 J9 DRUG DEVELOP RES JI Drug Dev. Res. PD JUN PY 2003 VL 59 IS 2 BP 191 EP 193 DI 10.1002/ddr.10218 PG 3 WC Chemistry, Medicinal; Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA 697ZY UT WOS:000183974200001 ER PT J AU Gatley, SJ Volkow, ND Fowler, JS Ding, YS Logan, J Wang, GJ Gifford, AN AF Gatley, SJ Volkow, ND Fowler, JS Ding, YS Logan, J Wang, GJ Gifford, AN TI Positron emission tomography and its use to image the occupancy of drug binding sites SO DRUG DEVELOPMENT RESEARCH LA English DT Review DE PET; occupancy; neuroleptic; cocaine; ritalin; monoamine oxidase ID DOPAMINE TRANSPORTER OCCUPANCY; D-2 RECEPTOR OCCUPANCY; MONOAMINE-OXIDASE-B; SEROTONIN REUPTAKE INHIBITORS; CATECHOL-O-METHYLTRANSFERASE; HEALTHY-HUMAN SUBJECTS; BRAIN MAO-B; IN-VIVO; BETA-CIT; SCHIZOPHRENIC-PATIENTS AB The development of positron emission tomography (PET) and the ability to synthesize compounds labeled with the short-lived positron emitters C-11 and F-18 has made possible the imaging and quantification of drug binding sites in the human body. By conducting PET studies with an appropriate radioligand before and after treatment with a drug, the fraction of the total number of binding sites that is occupied by the drug (the "occupancy" of the site) can often be determined. To the extent that occupancy is a good indicator of pharmacological activity, such PET experiments can aid the development of drug dosage regimens. Some of the general issues involved in PET studies of drug occupancy are discussed. There have been many such studies involving antipsychotic drugs and dopamine D-2 receptor radioligands. Since neuroleptics have been extensively reviewed elsewhere, only the major findings are discussed here. Other binding sites (and drug classes) in the dopamine system to which this methodology has been applied include: the dopamine transporter (stimulant drugs) and monoamine oxidase A and B (antidepressant drugs). Occupancy studies are also possible for many drug targets beyond the dopamine system. (C) 2003 Wiley-Liss, Inc. C1 Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Gatley, SJ (reprint author), Brookhaven Natl Lab, Dept Med, 30 Bell Ave, Upton, NY 11973 USA. NR 108 TC 9 Z9 9 U1 1 U2 7 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0272-4391 J9 DRUG DEVELOP RES JI Drug Dev. Res. PD JUN PY 2003 VL 59 IS 2 BP 194 EP 207 DI 10.1002/ddr.10219 PG 14 WC Chemistry, Medicinal; Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA 697ZY UT WOS:000183974200002 ER PT J AU Ding, YS Fowler, JS AF Ding, YS Fowler, JS TI Highlights of PET studies on chiral radiotracers and drugs at Brookhaven SO DRUG DEVELOPMENT RESEARCH LA English DT Article DE positron emission tomography; chiral drugs; carbon-11; fluorine-18; stereoselectivity ID POSITRON EMISSION TOMOGRAPHY; NUCLEOPHILIC AROMATIC-SUBSTITUTION; PRESYNAPTIC DOPAMINERGIC NEURON; SYMPATHETIC-NERVOUS-SYSTEM; C-11 L-DEPRENYL; BABOON BRAIN; THREO-METHYLPHENIDATE; HUMAN-HEART; INVIVO MEASUREMENT; SIGMA-RECEPTORS AB We review several PET studies of chiral molecules which have been carried out in our laboratory. In many cases the enantiomers behave differently, reflecting factors such as differential specificity for enzymes and transporters and binding to plasma proteins, as well as selective binding to receptors. These studies demonstrate that PET imaging is a suitable method to investigate the behavior of a chiral drug in the human body and is a powerful tool in drug development. It is important to emphasize the essential and pivotal role that organic synthesis has played in the development of PET during the last quarter century. PET is now an important tool in the neurosciences, cardiology, and oncology and is available in hundreds of institutions worldwide. However, PET is by no means mature in terms of the study of chiral drugs; hundreds of racemic drugs have been developed but only a few have been labeled with positron emitters to study their stereoselectivity. One reason is the complexity of rapid synthesis, including chiral synthesis and chiral purification. New developments in these areas are needed. Although PET is a challenging and expensive technology, it is exquisitely suited to functional and neurochemical studies of the human brain and other organs. its use in drug research and development holds promise in understanding duration of action and stereoselectivity of drugs and in facilitating drug discovery and the introduction of new drugs into the practice of medicine. (C) 2003 Wiley-Liss, Inc. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. RP Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM ding@bnl.gov NR 80 TC 7 Z9 7 U1 0 U2 0 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0272-4391 EI 1098-2299 J9 DRUG DEVELOP RES JI Drug Dev. Res. PD JUN PY 2003 VL 59 IS 2 BP 227 EP 239 DI 10.1002/ddr.10221 PG 13 WC Chemistry, Medicinal; Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA 697ZY UT WOS:000183974200004 ER PT J AU Gerasimov, MR Dewey, SL AF Gerasimov, MR Dewey, SL TI Development of a GABAergic treatment for substance abuse using PET SO DRUG DEVELOPMENT RESEARCH LA English DT Article DE PET; neurotransmitter; gamma-vinyl GABA; addiction ID GAMMA-VINYL-GABA; POSITRON-EMISSION-TOMOGRAPHY; NUCLEUS-ACCUMBENS DOPAMINE; FREELY MOVING RATS; CONDITIONED PLACE PREFERENCE; AMINOBUTYRIC-ACID GABA; IN-VIVO MICRODIALYSIS; INDUCED INCREASES; HUMAN-BRAIN; EXTRACELLULAR DOPAMINE AB Development of an effective treatment for substance abuse relies on a better understanding of the nature of the brain reward circuitry and neurotransmitter systems regulating the mechanisms responsible for drug abuse, addiction, and dependence. The use of positron emission tomography (PET) enables the direct assessment of pharmacokinetic and pharmacodynamic events in vivo. We demonstrated that administration of gamma-vinyl gamma aminobutyric acid (GVG, vigabatrin), acting through potentiation of GABAergic tone, leads to decreases in brain extracellular dopamine concentrations as measured with PET and in vivo microdialysis. This knowledge, combined with the notion that addictive drugs share the ability to stimulate dopaminergic neurotransmission, suggests a novel GABAergic strategy for the treatment of substance abuse. Over the past several years PET and in vivo microdialysis, combined with an array of behavioral tests, have demonstrated the potential utility of this approach. Taken together, our data support the use of vigabatrin for the treatment of multiple drug addictions. (C) 2003 Wiley-Liss, Inc. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Gerasimov, MR (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. NR 73 TC 5 Z9 5 U1 1 U2 4 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0272-4391 J9 DRUG DEVELOP RES JI Drug Dev. Res. PD JUN PY 2003 VL 59 IS 2 BP 240 EP 248 DI 10.1002/ddr.10222 PG 9 WC Chemistry, Medicinal; Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA 697ZY UT WOS:000183974200005 ER PT J AU Moody, R Schmidt, B Alcock, C Goldader, J Axelrod, T Cook, KH Marshall, S AF Moody, R Schmidt, B Alcock, C Goldader, J Axelrod, T Cook, KH Marshall, S TI Initial results from the Southern Edgeworth-Kuiper belt Survey SO EARTH MOON AND PLANETS LA English DT Article AB We present preliminary results of the analysis of the first 500 square degrees of the Southern Edgeworth-Kuiper belt Survey, a large sky survey which ran from January 2000 to January 2003 and comprises 2900degrees. in total. Early tests predict that we should discover similar to 10 bright TNOs in our data, doubling the current known population. C1 Australian Natl Univ, Res Sch Astron & Astrophys, Lyneham, ACT 2602, Australia. Univ Penn, Dept Astron, Philadelphia, PA 19104 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Moody, R (reprint author), Australian Natl Univ, Res Sch Astron & Astrophys, Lyneham, ACT 2602, Australia. OI Schmidt, Brian/0000-0001-6589-1287 NR 5 TC 8 Z9 8 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-9295 J9 EARTH MOON PLANETS JI Earth Moon Planets PD JUN PY 2003 VL 92 IS 1-4 BP 125 EP 130 DI 10.1023/B:MOON.0000031931.12546.7f PG 6 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA 829OD UT WOS:000222057600011 ER PT J AU Alcock, C Dave, R Giammarco, J Goldader, J Lehner, M King, SK Lee, T Wang, A Wang, SY Wen, CY Chen, WP Cook, K Marshall, S Porrata, R Byun, YI de Pater, I Rice, J Lissauer, J AF Alcock, C Dave, R Giammarco, J Goldader, J Lehner, M King, SK Lee, T Wang, A Wang, SY Wen, CY Chen, WP Cook, K Marshall, S Porrata, R Byun, YI de Pater, I Rice, J Lissauer, J TI TAOS: The Taiwanese-American Occultation Survey SO EARTH MOON AND PLANETS LA English DT Article ID KUIPER-BELT OBJECTS AB The Taiwanese - American Occultation Survey (TAOS) seeks to determine the number and size spectrum for small (similar to3 km) bodies in the Kuiper Belt. This will be accomplished by searching for the brief occultations of bright stars ( R similar to 14) by these objects. We have designed and built a special purpose photometric monitoring system for this purpose. TAOS comprises four 50 cm telescopes, each equipped with a 2048 x 2048 pixel CCD camera, in a compact array located in the central highlands of Taiwan. TAOS will monitor up to 3, 000 stars at 5 Hz. The system will go into scientific operation at the end of 2003. C1 Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA. Acad Sinica, Inst Astron, Taipei 115, Taiwan. Acad Sinica, Inst Astrophys, Taipei 115, Taiwan. Natl Cent Univ, Dept Astron, Chungli 32054, Taiwan. Lawrence Livermore Natl Lab, Livermore, CA USA. Yonsei Univ Observ, Seoul, South Korea. Univ Calif Berkeley, Berkeley, CA 94720 USA. NASA, Ames Res Ctr, Mountain View, CA USA. RP Alcock, C (reprint author), Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA. NR 7 TC 11 Z9 11 U1 1 U2 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-9295 J9 EARTH MOON PLANETS JI Earth Moon Planets PD JUN PY 2003 VL 92 IS 1-4 BP 459 EP 464 DI 10.1023/B:MOON.0000031960.82021.26 PG 6 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA 829OD UT WOS:000222057600040 ER PT J AU Coffey, GW Hardy, JS Pederson, LR Rieke, PC Thomsen, EC AF Coffey, GW Hardy, JS Pederson, LR Rieke, PC Thomsen, EC TI Oxygen reduction activity of lanthanum strontium nickel ferrite SO ELECTROCHEMICAL AND SOLID STATE LETTERS LA English DT Article ID OXIDE FUEL-CELLS; LAFEO3 BASE PEROVSKITES; THERMODYNAMIC PROPERTIES; CATHODE MATERIALS; STACKS; ALLOY; SOFCS; NI AB The reduction of oxygen on nickel-doped lanthanum strontium ferrite was studied by current interrupt cyclic voltammetry. Nickel doped on the B site of the perovskite ranged from 0 to 40%. Nickel strongly influenced the sintering of the films. The minimum temperature at which a stable adherent robust film could be formed increased with nickel content. The electrochemical performance for reduction of oxygen was compared with nickel content. Undoped lanthanum strontium ferrite consistently showed greater activity than the doped materials. The data were further analyzed to obtain the exchange current density as a function of temperature and then further analyzed to obtain the activation energy and pre-exponential factor. These values did not correlate with nickel composition but did correlate with one another. The variation in performance was tentatively attributed to subtle variations in microstructure. (C) 2003 The Electrochemical Society. C1 Pacific NW Natl Lab, Div Mat, Richland, WA 99352 USA. RP Coffey, GW (reprint author), Pacific NW Natl Lab, Div Mat, Richland, WA 99352 USA. RI Hardy, John/E-1938-2016 OI Hardy, John/0000-0002-1699-3196 NR 24 TC 11 Z9 11 U1 1 U2 5 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA SN 1099-0062 J9 ELECTROCHEM SOLID ST JI Electrochem. Solid State Lett. PD JUN PY 2003 VL 6 IS 6 BP A121 EP A124 DI 10.1149/1.1568174 PG 4 WC Electrochemistry; Materials Science, Multidisciplinary SC Electrochemistry; Materials Science GA 668BD UT WOS:000182269700007 ER PT J AU Lee, SH Cheong, HM Liu, P Tracya, CE AF Lee, SH Cheong, HM Liu, P Tracya, CE TI Improving the durability of amorphous vanadium oxide thin-film electrode in a liquid electrolyte SO ELECTROCHEMICAL AND SOLID STATE LETTERS LA English DT Article ID LITHIUM BATTERIES; V2O5; PENTOXIDE; BEHAVIOR AB We report on the effects of depositing a protective inorganic solid electrolyte LiAlF4 coating on amorphous V2O5 electrode in terms of long-term cycling efficiency and stability of the V2O5 in a liquid electrolyte. Two V2O5 thin-film electrodes were fabricated for extensive cyclic durability testing in a LiClO4/propylene carbonate liquid electrolyte: One V2O5 film had no overlying coating while the other had a protective thin film of solid lithium ion conducting LiAlF4. The protected V2O5 exhibited improved durability in terms of constant capacity with repeated cycling up to 800 cycles, while the uncoated V2O5 electrode displayed significant capacity loss. Our results demonstrate that deposition of an inorganic solid electrolyte (LiAlF4) on amorphous V2O5 films serves as a protective overlayer and enhances the long-term cycling efficiency and stability of the V2O5 in a liquid electrolyte. (C) 2003 The Electrochemical Society. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Sogang Univ, Seoul 121742, South Korea. RP Lee, SH (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. RI Lee, Sehee/A-5989-2011; Cheong, Hyeonsik/D-7424-2012; Liu, Ping/I-5615-2012 OI Cheong, Hyeonsik/0000-0002-2347-4044; NR 19 TC 22 Z9 22 U1 0 U2 10 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA SN 1099-0062 J9 ELECTROCHEM SOLID ST JI Electrochem. Solid State Lett. PD JUN PY 2003 VL 6 IS 6 BP A102 EP A105 DI 10.1149/1.1567533 PG 4 WC Electrochemistry; Materials Science, Multidisciplinary SC Electrochemistry; Materials Science GA 668BD UT WOS:000182269700002 ER PT J AU Kelly, JJ Goods, SH Yang, NYC AF Kelly, JJ Goods, SH Yang, NYC TI High performance nanostructured Ni-Mn alloy for microsystem applications SO ELECTROCHEMICAL AND SOLID STATE LETTERS LA English DT Article ID NICKEL; FABRICATION; SYSTEMS; LIGA; MEMS AB A process has been developed for the electrodeposition of a high strength, heat resistant Ni-Mn alloy for high aspect ratio microstructures (HARMST). A conventional Ni sulfamate electrolyte is employed with the addition of a small amount of manganese chloride. The deposits are low stress (< &SIM;60 MPa tensile), enabling the deposition of thick section films required for HARMST. The Mn content for the alloys of interest is less than about 1 wt %, and its codeposition is insensitive to mass-transport effects, permitting uniform alloy deposition, regardless of feature aspect ratio. A pulsed deposition scheme is employed to fabricate a nanostructured film consisting of alternating nanometer thick regions of relatively pure Ni, and hard, Mn-rich Ni; this moderates the high stress of the NiMn alloy and enables the deposition of thick deposits. Yield strengths of over 800 MPa are achievable, with good as-plated ductility (&SIM;6%). The material loses only about 15% of its original strength after a 1 h, 600&DEG;C anneal, and no embrittlement is observed since no S-bearing additives are employed. (C) 2003 The Electrochemical Society. C1 Sandia Natl Labs, Ctr Mat Sci & Engn, Livermore, CA 94551 USA. RP Kelly, JJ (reprint author), Sandia Natl Labs, Ctr Mat Sci & Engn, Livermore, CA 94551 USA. NR 20 TC 27 Z9 29 U1 3 U2 14 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA SN 1099-0062 J9 ELECTROCHEM SOLID ST JI Electrochem. Solid State Lett. PD JUN PY 2003 VL 6 IS 6 BP C88 EP C91 DI 10.1149/1.1567532 PG 4 WC Electrochemistry; Materials Science, Multidisciplinary SC Electrochemistry; Materials Science GA 668BD UT WOS:000182269700011 ER PT J AU Belharouak, I Amine, K AF Belharouak, I Amine, K TI Li2MTi6O14 (M=Sr, Ba): new anodes for lithium-ion batteries SO ELECTROCHEMISTRY COMMUNICATIONS LA English DT Article DE lithium-ion batteries; anode; titanate; structure ID SPINEL ELECTRODES; OXIDES AB Isostructural Li2MTi6O14 (M = Sr, Ba) materials, prepared by a solid state reaction method, have been investigated as insertion electrodes for lithium battery applications. These titanate compounds have a structure that consists of a three-dimensional network of corner- and edge-shared [TiO6] octahedra, 11-coordinate polyhedra for the alkali-earth ions, and [LiO4] tetrahedra in tunnels that also contain vacant tetrahedral and octahedral sites. Electrochemical data show that these compounds are capable of reversibly intercalating four lithium atoms in a three-stage process between 1.4 and 0.5 V vs. metallic lithium. The electrodes provide a practical capacity of approximately 140 mAh/g; they are, therefore, possible alternative anode materials to the lithium titanate spinet, Li4Ti5O12. The lithium intercalation mechanism and crystal structure of Li2MTi6O14 (M = Sr, Ba) electrodes are discussed and compared with the electrochemical and structural properties of Li4Ti5O12. The area-specific impedance (ASI) of Li/Li2SrTi6O14 cells was found to be significantly lower than that of Li/Li4Ti5O12 cells. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Chem Technol, Argonne, IL 60439 USA. RP Belharouak, I (reprint author), Argonne Natl Lab, Div Chem Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Amine, Khalil/K-9344-2013; OI Belharouak, Ilias/0000-0002-3985-0278 NR 9 TC 44 Z9 46 U1 4 U2 18 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 1388-2481 J9 ELECTROCHEM COMMUN JI Electrochem. Commun. PD JUN PY 2003 VL 5 IS 6 BP 435 EP 438 DI 10.1016/S1388-2481(03)00090-0 PG 4 WC Electrochemistry SC Electrochemistry GA 691EG UT WOS:000183591400001 ER PT J AU Meyers, S McMahon, JE McNeil, M Liu, X AF Meyers, S McMahon, JE McNeil, M Liu, X TI Impacts of US federal energy efficiency standards for residential appliances SO ENERGY LA English DT Article AB This study estimated energy, environmental, and consumer impacts of US federal residential energy efficiency standards taking effect in the 1988-2007 period. These standards have been the subject of in-depth analyses conducted as part of the US Department of Energy's (DOE's) standards rulemaking process. This study drew on those analyses, but updated key data and developed a common framework and assumptions for all of the products. We estimate that the considered standards will reduce residential primary energy consumption and carbon dioxide (CO2) emissions by 8-9% in 2020 compared to the levels expected without any standards. The standards will save a cumulative total of 26-32 EJ (25-30 quads) by the year 2015, and 63 EJ (60 quads) by 2030. The estimated cumulative net present value of consumer benefit amounts to nearly US$80 billion by 2015, and grows to US$130 billion by 2030. The overall benefit/cost ratio of cumulative consumer impacts in the 1987-2050 period is 2.75:1. The cumulative cost of the DOE's program to establish and implement the standards is in the range of US$200-US$250 million. Published by Elsevier Science Ltd. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Meyers, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 9 TC 40 Z9 40 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0360-5442 J9 ENERGY JI Energy PD JUN PY 2003 VL 28 IS 8 BP 755 EP 767 DI 10.1016/S0360-5442(02)00188-3 PG 13 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA 668HV UT WOS:000182285000001 ER PT J AU Streets, DG AF Streets, DG TI Environmental benefits of electricity grid interconnections in Northeast Asia SO ENERGY LA English DT Article; Proceedings Paper CT Workshop on Power Grid Interconnection in Northeast Asia CY MAY 14-16, 2001 CL BEIJING, PEOPLES R CHINA SP Nautilus Inst ID GREENHOUSE-GAS EMISSIONS; ATMOSPHERIC AEROSOLS; ENERGY-CONSUMPTION; AIR-POLLUTION; BLACK CARBON; ACID-RAIN; CHINA; DEPOSITION; MODEL AB From an environmental perspective, electricity grid interconnections in Northeast Asia make sense. Cities in Northeast China, Mongolia, the Democratic People's Republic of Korea (DPRK), and the Republic of Korea (ROK) suffer from poor air quality due to the extensive use of coal-fired power generation. Rural communities suffer from a deficit of electricity, forcing reliance on coal and biofuels for cooking and heating in the home, which causes health-damaging indoor air pollution. Regional air pollution from acid rain and ozone is widespread. In addition, Japan is finding it hard to meet its commitment under the Kyoto Protocol. Yet, just across their borders in far eastern Russia are extensive, clean energy resources: hydroelectricity and natural gas, and (potentially) nuclear power and tidal power. It would be environmentally beneficial to generate electricity cleanly, in far eastern Russia and transmit the electricity across the borders into China, Mongolia, the DPRK, the ROK, and Japan, thereby displacing coal-fired electricity generation. We estimate that currently planned projects could alleviate the problems of two to five Chinese cities, with the potential for much larger benefits in the future. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Argonne Natl Lab, Decis & Informat Sci Div, Argonne, IL 60439 USA. RP Streets, DG (reprint author), Argonne Natl Lab, Decis & Informat Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA. OI Streets, David/0000-0002-0223-1350 NR 37 TC 12 Z9 12 U1 1 U2 10 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0360-5442 J9 ENERGY JI Energy PD JUN PY 2003 VL 28 IS 8 BP 789 EP 807 DI 10.1016/S0360-5442(03)00030-6 PG 19 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA 668HV UT WOS:000182285000003 ER PT J AU Mitchell-Jackson, J Koomey, JG Nordman, B Blazek, A AF Mitchell-Jackson, J Koomey, JG Nordman, B Blazek, A TI Data center power requirements: measurements from Silicon Valley SO ENERGY LA English DT Article AB Current estimates of data center power requirements are greatly overstated because they are based. on criteria that incorporate oversized, redundant systems, and several safety factors. Furthermore, most estimates assume that data centers are filled to capacity. For the most part, these numbers are unsubstantiated. Although there are many estimates of the amount of electricity consumed by data centers, until this study, there were no publicly available measurements of power use. This paper examines some of the reasons why power requirements at data centers are overstated and adds actual measurements and the analysis of real-world data to the public policy debate over how much energy these facilities use. Published by Elsevier Science Ltd. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Energy & Resources Grp, Berkeley, CA 94720 USA. AT&T, Pleasanton, CA 94588 USA. RP Koomey, JG (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd,Mail Stop 90-4000, Berkeley, CA 94720 USA. NR 13 TC 33 Z9 34 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0360-5442 J9 ENERGY JI Energy PD JUN PY 2003 VL 28 IS 8 BP 837 EP 850 DI 10.1016/S0360-5442(03)00009-4 PG 14 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA 668HV UT WOS:000182285000006 ER PT J AU Lee, JW Li, RF AF Lee, JW Li, RF TI Integration of fossil energy systems with CO2 sequestration through NH4HCO3 production SO ENERGY CONVERSION AND MANAGEMENT LA English DT Article DE CO2 sequestration; CO2 solidification by NH4HCO3 formation; CO2, NOx, and SOx removal; CO2, NOx and SOx solidification; reduction of industrial greenhouse gas emissions; NH4HCO3 enhanced carbonation of soil and; subsoil earth layers; integration of fossil energy systems with NH4HCO3 production; mitigation of global warming; carbon dioxide; ammonium bicarbonate; clean energy systems ID METHANOGENESIS AB The increasing anthropogenic CO2 emission and global warming (thus climate change) have challenged the United States and other countries to find new and better ways to meet the world's increasing needs for energy while reducing greenhouse gases emissions. Here, we present a practical and revolutionary method that can sequester greenhouse gas emissions and, at the same time, benefit both agriculture and the economy. The proposed strategy utilizes an innovative application of chemical processes to convert CO2, NOx and SOx emissions into valuable fertilizers (mainly, NH4HCO3) that can enhance sequestration Of CO2 into soil and subsoil earth layers, reduce NO3- contamination of groundwater and stimulate photosynthetic fixation Of CO2 from the atmosphere. This invention integrates pollutant removing fertilizer production reactions with coal-fired power plants and other energy operations, resulting in a clean energy system that is in harmony with the earth ecosystem. This technology could contribute importantly to global CO2 sequestration and clean air protection. When this technology is in worldwide use, because of its high efficiency and carbon credit, in addition to the benefit of clean air protection and stimulation of photosynthetic fixation Of CO2 from the atmosphere, maximally 300 million tons Of CO2 per year (equivalent to about 5% of the CO2 emissions from coal-fired power plants in the world) from smokestacks can be placed into soil by the use of this technology. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37381 USA. Jinhuashi Chem Fertilizer Factory, Prod Technol Div, Jinhua City, Zhejiang Prov, Peoples R China. RP Lee, JW (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37381 USA. NR 18 TC 28 Z9 35 U1 1 U2 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0196-8904 J9 ENERG CONVERS MANAGE JI Energy Conv. Manag. PD JUN PY 2003 VL 44 IS 9 BP 1535 EP 1546 AR PII S0196-8904(02)00149-8 DI 10.1016/S0196-8904(02)00149-8 PG 12 WC Thermodynamics; Energy & Fuels; Mechanics SC Thermodynamics; Energy & Fuels; Mechanics GA 639DJ UT WOS:000180612100013 ER PT J AU Tonn, B Schmoyer, R Wagner, S AF Tonn, B Schmoyer, R Wagner, S TI Weatherizing the homes of low-income home energy assistance program clients: a programmatic assessment SO ENERGY POLICY LA English DT Article AB The purpose of this project was to assess the relationships between two United States (US) federal-level programs that support low-income households, the Weatherization Assistance Program and the Low-Income Home Energy Assistance Program (LIHEAP). The study area for this project was Boston, Massachusetts, which is a representative of large northern urban areas in the US. Data were collected for three groups of households that received both weatherization and LIHEAP assistance and for one control group that only received LIHEAP assistance. The clearest impact of weatherization assistance on changes in LIHEAP assistance is shown in decreases in eligibility for high-energy benefits post-weatherization. A further statistical test also suggests that weatherization has a significant impact in reducing the overall needs for LIHEAP subsidies. However, it cannot be concluded that weatherization reduced the need for standard LIHEAP subsidies. Households in the sample that did drop out of the LIHEAP program had relatively higher incomes, younger household heads, and fewer years in home than those who stayed in the program. These demographics suggest that the households that dropped out of the program were more likely to experience income increases to make them ineligible for the program and were more likely to move out of the study area. Additionally, for no group for no time period did LIHEAP benefits cover all primary heating fuel bills. Thus, the overall conclusions of this study are that weatherization decreased the need for high-energy benefits but did not lead to low-income households relinquishing the need for standard LIHEAP benefits. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Univ Tennessee, Knoxville, TN USA. RP Tonn, B (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Bldg 4500N,POB 2008, Oak Ridge, TN 37831 USA. EM bet@ornl.gov NR 7 TC 2 Z9 2 U1 0 U2 6 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0301-4215 J9 ENERG POLICY JI Energy Policy PD JUN PY 2003 VL 31 IS 8 BP 735 EP 744 AR PII S0301-4215(02)00124-6 DI 10.1016/S0301-4215(02)00124-6 PG 10 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA 660CC UT WOS:000181815400005 ER PT J AU Sutradhar, A Paulino, GH Gray, LJ AF Sutradhar, A Paulino, GH Gray, LJ TI Transient heat conduction in homogeneous and non-homogeneous materials by the Laplace transform Galerkin boundary element method (vol 26, pg 119, 2002) SO ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS LA English DT Correction C1 Univ Illinois, Dept Civil & Environm Engn, Newmark Lab, Urbana, IL 61801 USA. Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. RP Paulino, GH (reprint author), Univ Illinois, Dept Civil & Environm Engn, Newmark Lab, 205 N Mathews Ave, Urbana, IL 61801 USA. RI Paulino, Glaucio/A-2426-2008; OI Sutradhar, Alok/0000-0001-8166-9950 NR 1 TC 3 Z9 3 U1 0 U2 1 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0955-7997 J9 ENG ANAL BOUND ELEM JI Eng. Anal. Bound. Elem. PD JUN PY 2003 VL 27 IS 6 BP 639 EP 639 DI 10.1016/S0955-7997(03)00014-6 PG 1 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications SC Engineering; Mathematics GA 699JH UT WOS:000184052900009 ER PT J AU Wilbanks, TJ Kane, SM Leiby, PN Perlack, RD Settle, C Shogren, JF Smith, JB AF Wilbanks, TJ Kane, SM Leiby, PN Perlack, RD Settle, C Shogren, JF Smith, JB TI Possible responses to global climate change - Integrating mitigation and adaptation SO ENVIRONMENT LA English DT Article C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Natl Sci Fdn, Directorate Social Behav & Econ Sci, Arlington, VA 22230 USA. Univ Tulsa, Tulsa, OK 74104 USA. Univ Wyoming, Laramie, WY 82071 USA. Stratus Consulting Inc, Boulder, CO USA. RP Wilbanks, TJ (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA. RI Shogren, Jason/B-9771-2017 OI Shogren, Jason/0000-0003-3757-959X NR 21 TC 22 Z9 22 U1 2 U2 16 PU HELDREF PUBLICATIONS PI WASHINGTON PA 1319 EIGHTEENTH ST NW, WASHINGTON, DC 20036-1802 USA SN 0013-9157 J9 ENVIRONMENT JI Environment PD JUN PY 2003 VL 45 IS 5 BP 28 EP 38 PG 11 WC Environmental Sciences; Environmental Studies SC Environmental Sciences & Ecology GA 682LF UT WOS:000183092600004 ER PT J AU Schaff, SD Pezeshki Sr Shields, FD AF Schaff, SD Pezeshki, SR Shields, FD TI Effects of soil conditions on survival and growth of black willow cuttings SO ENVIRONMENTAL MANAGEMENT LA English DT Article DE bioengineering; black willow; erosion control; riverbank restoration; Salix nigra ID WATER-TABLE DECLINE; HYBRID POPLAR; RADIATA PINE; SALIX-NIGRA; COMPACTION; ROOT; RESPONSES; SEEDLINGS; VEGETATION; MANAGEMENT AB Current streambank restoration efforts focus on providing bank stability, enhancing water quality, and improving woody habitat using native vegetation rather than traditional engineering techniques. However, in most cases harsh site conditions limit restoration success. A two-year field study was conducted at Twentymile Creek, in northern Mississippi, investigating edaphic factors governing the survival of black willow (Salix nigra) cuttings used for streambank restoration. Low height growth, above-ground biomass production, and average leaf area were observed in willow cuttings grown in plots subjected to moisture deficits. However, sediment texture emerged as the dominant factor determining willow post growth, health, and survival, Shoot biomass, leaf biomass, and total above-ground biomass were 15-, 10-, and 14-fold greater for large willow cuttings (posts) grown in plots with sandy sediments relative to those grown in plots with similar moisture and soil redox potential but with silt and clay sediments. Average leaf size, average leaf mass and specific leaf area were all lower in fine textured plots. Under moisture conditions present at our sites, coarse-grained sediment (sand) was more conducive to willow growth, biomass production, and survival than were fine-grained sediments (silt/clay). Our results strongly suggest that soil texture and moisture conditions can determine restoration success. Therefore, it is critical that site conditions are factored into the selection of project locations prior to the initiation of willow planting restoration projects. C1 Univ Memphis, Dept Biol, Memphis, TN 38152 USA. USDA ARS, Natl Sedimentat Lab, Oxford, MS 38655 USA. RP Schaff, SD (reprint author), Univ Georgia, Savannah River Ecol Lab, PO Drawer E Aiken, Aiken, SC 29802 USA. EM sschaff@uga.edu NR 59 TC 38 Z9 41 U1 1 U2 19 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0364-152X J9 ENVIRON MANAGE JI Environ. Manage. PD JUN PY 2003 VL 31 IS 6 BP 748 EP 763 DI 10.1007/s00267-002-2909-y PG 16 WC Environmental Sciences SC Environmental Sciences & Ecology GA 711AK UT WOS:000184714800006 PM 14565695 ER PT J AU Zawislanski, PT Benson, SM Terberg, R Borglin, SE AF Zawislanski, PT Benson, SM Terberg, R Borglin, SE TI Selenium speciation, solubility, and mobility in land-disposed dredged sediments SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID KESTERSON RESERVOIR; ELEMENTAL SELENIUM; CALIFORNIA SOILS; TRANSFORMATIONS; OXIDATION AB Pilot-scale tests for the land disposal of Se-enriched sediments from the San Luis Drain were performed in the San Joaquin Valley, California. Three test plots were instrumented and monitored on a dirt-road embankment near the sediment source area, providing an opportunity to measure Se oxidation and solubilization rates over a period of 2-3 yr. Soil, soil water, and groundwater data indicated that the amendment did not cause movement of dissolved Se below a depth of 15 cm. The low permeability of underlying sediments and the overall low Se solubility limit Se movement toward the groundwater table. Selenium remained in reduced forms and largely immobile at this site although in-situ Se oxidation was measurable. Soluble Se concentrations increased from less than 0.5% to approximately 2.5% in the first 207 d following sediment application. Minor Se solubilization occurred after 439 and 704 d. Changes in Se fractionation measured using sequential extractions and Se speciation based on X-ray spectroscopy (XANES) results were in qualitative agreement. XANES results indicated initially rapid oxidation of organo-Se and/or elemental Se to selenite during the first 207 d, followed by minor oxidation after 439 d. Further solubilization of the Se inventory is anticipated, but at a low rate of 1-2% per year, comparable to rates measured in other studies. C1 LFR Levine Fricke Inc, Emeryville, CA 94608 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Zawislanski, PT (reprint author), LFR Levine Fricke Inc, 1900 Powell St,12th Floor, Emeryville, CA 94608 USA. RI Schneider, Larissa/C-9863-2012; Borglin, Sharon/I-1013-2016 NR 26 TC 52 Z9 58 U1 1 U2 26 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD JUN 1 PY 2003 VL 37 IS 11 BP 2415 EP 2420 DI 10.1021/es020977z PG 6 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 685CB UT WOS:000183242300038 PM 12831026 ER PT J AU Jackson, BP Hopkins, WA Baionno, J AF Jackson, BP Hopkins, WA Baionno, J TI Laser Ablation-ICP-MS analysis of dissected tissue: A conservation-minded approach to assessing contaminant exposure SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID PLASMA-MASS SPECTROMETRY; TRACE-ELEMENTS; REPTILES AB Minimally invasive sampling techniques are an essential ecotoxicological tool for continuous assessment of contaminant exposure and in instances where it is not desirable or practical to sacrifice the animal. In this paper, we report on the application of laser ablation-ICP-MS (LA-ICP-MS) for sampling of minute (similar to1 mg, 2-3 mm) tail clips of the banded water snake, Nerodia fasciata, as a means to assess contaminant exposure. The snakes were split into three treatments (n = 8) and were fed three increasing levels (control, medium, and high) of fish contaminated with As, Se, and Sr for 24 months. LA-ICP-MS concentrations of tail clips for all three elements were significantly correlated with the remaining whole tail concentration determined by homogenization, acid digestion, and ICP-MS analysis. Additionally, LA-ICP-MS concentrations for As and Se in the tail clip were similar to the acid digestion solution analysis values for the whole tail, which suggests that these elements are homogeneously distributed. Strontium concentrations were underestimated by LA-ICP-MS when compared to whole tail concentrations. Statistical analysis showed that LA-ICP-MS tail clip concentrations differed significantly according to dietary treatment. Posterior probability error rates from nonparametric discriminant function analysis indicated that LA-ICP-MS analysis of tail clips was useful for predicting exposure to Se with only a 4% probability of misclassification among treatments. Errors associated with misclassification of As were greater (17%) but this was, in part, related to the low concentrations of As in the tail (< 1 ppm for the highest treatment). Taken together, the findings from this study suggest that LA-ICP-MS of microdissected tissue shows promise as a nondestructive technique for conservation-minded ecotoxicological studies. C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. RP Jackson, BP (reprint author), Univ Georgia, Savannah River Ecol Lab, PO Drawer E, Aiken, SC 29802 USA. NR 15 TC 25 Z9 25 U1 2 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD JUN 1 PY 2003 VL 37 IS 11 BP 2511 EP 2515 DI 10.1021/es026416p PG 5 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 685CB UT WOS:000183242300049 PM 12831037 ER PT J AU Singer, BC Wenzel, TP AF Singer, BC Wenzel, TP TI Estimated emission reductions from California's Enhanced Smog Check Program SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article AB The U.S. Environmental Protection Agency requires that states evaluate the effectiveness of their vehicle emissions inspection and maintenance (I/M) programs. This study demonstrates an evaluation approach that estimates mass emission reductions over time and includes the effect of I/M on vehicle deterioration. It includes a quantitative assessment of benefits from pre-inspection maintenance and repairs and accounts for the selection bias effect that occurs when intermittent high emitters are tested. We report estimates of one-cycle emission benefits of California's Enhanced Smog Check program, ca. 1999. Program benefits equivalent to metric tons per day of prevented emissions were calculated with a "bottom-up" approach that combined average per vehicle reductions in mass emission rates (g/gal) with average per vehicle activity, resolved by model year. Accelerated simulation mode test data from the statewide vehicle information database (VID) and from roadside Smog Check testing were used to determine 2-yr emission profiles of vehicles passing through Smog Check and infer emission profiles that would occur without Smog Check. The number of vehicles participating in Smog Check was also determined from the VID. We estimate that in 1999 Smog Check reduced tailpipe emissions of HC, CO, and NOx by 97, 1690, and 81 t/d, respectively. These correspond to 26, 34, and 14% of the HC, CO, and NOx that would have been emitted by vehicles in the absence of Smog Check. These estimates are highly sensitive to assumptions about vehicle deterioration in the absence of Smog Check. Considering the estimated uncertainty in these assumptions yields a range for calculated benefits: 46-128 t/d of HC, 860-2200 t/d of CO, and 60-91 t/d of NOx. Repair of vehicles that failed an initial, official Smog Check appears to be the most important mechanism of emission reductions, but pre-inspection maintenance and repair also contributed substantially. Benefits from removal of nonpassing vehicles accounted for a small portion of total benefits. In 1999, more than 90% of all HC and CO benefits and over 80% of all NOx benefits were attributed to vehicles more than 10 years old, even though such vehicles represented only half of those tested in the program. C1 Univ Calif Berkeley, EO Lawrence Berkeley natl Lab, Berkeley, CA 94720 USA. RP Wenzel, TP (reprint author), Univ Calif Berkeley, EO Lawrence Berkeley natl Lab, Berkeley, CA 94720 USA. NR 18 TC 6 Z9 6 U1 1 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD JUN 1 PY 2003 VL 37 IS 11 BP 2588 EP 2595 DI 10.1021/es0208759 PG 8 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 685CB UT WOS:000183242300060 PM 12831048 ER PT J AU Melnitchouk, W AF Melnitchouk, W TI Quark-hadron duality in electron-pion scattering SO EUROPEAN PHYSICAL JOURNAL A LA English DT Review ID ELECTROMAGNETIC FORM-FACTOR; MUON-PAIR PRODUCTION; DRELL-YAN PROCESS; INELASTIC STRUCTURE-FUNCTION; HIGHER TWIST TERMS; SUM-RULES; QUANTUM CHROMODYNAMICS; PARTON DISTRIBUTIONS; EXCLUSIVE PROCESSES; NUCLEON SCATTERING AB We explore the relationship between exclusive and inclusive electromagnetic scattering from the pion, focusing on the transition region at intermediate Q(2). Combining Drell-Yan data on the leading twist quark distribution in the pion with a model for the resonance region at large x, we calculate QCD moments of the pion structure function over a range of Q(2), and quantify the role of higher twist corrections. Using a parameterization of the pion,elastic form factor and phenomenological models for the pi --> rho transition form factor, we further test the. extent to which local duality may be valid for the pion. C1 Jefferson Lab, Newport News, VA 23606 USA. RP Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA. EM wmelnitc@jlab.org NR 118 TC 11 Z9 11 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1434-6001 EI 1434-601X J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 2 BP 223 EP 234 DI 10.1140/epja/i2003-10006-6 PG 12 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 702LG UT WOS:000184224900008 ER PT J AU Burkert, VD AF Burkert, VD TI Status of the N* program at Jefferson Lab SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID TRANSITION FORM-FACTORS; QUARK-MODEL; ELECTROPRODUCTION; RESONANCE; DELTA(1232); DEPENDENCE; DECAYS AB Recent results in electromagnetic excitation of nucleon resonance are presented, and confronted with theoretical predictions. Preliminary data in the search, for missing states are discussed as well. C1 Jefferson Lab, Newport News, VA 23606 USA. RP Burkert, VD (reprint author), Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA. EM burkert@jlab.org NR 50 TC 9 Z9 9 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 303 EP 310 DI 10.1140/epja/i2002-10171-0 PG 8 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600003 ER PT J AU Arrington, J AF Arrington, J TI How well do we know the electromagnetic form factors of the proton? SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID SQUARED 4-MOMENTUM TRANSFERS; RATIO AB Recent measurements of recoil polarization in elastic scattering have been used to extract the ratio of the electric to the magnetic proton form factors. These results disagree with Rosenbluth extractions from cross.-section measurements, indicating either an inconsistency between the two techniques, or a problem with either the polarization transfer or cross-section measurements. To obtain precise knowledge of the proton form factors, we must first understand the source of this discrepancy. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Arrington, J (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Arrington, John/D-1116-2012 OI Arrington, John/0000-0002-0702-1328 NR 10 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 311 EP 315 DI 10.1140/epja/i2002-10172-y PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600004 ER PT J AU Perdrisat, CF AF Perdrisat, CF CA Jefferson Lab Hall A Collaboration TI Proton elastic form factor: The JLab data SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID DISPERSION-THEORETICAL ANALYSIS; SQUARED 4-MOMENTUM TRANSFERS; POLARIZATION TRANSFER; ELECTRON-SCATTERING; NUCLEON; NEUTRON; (GEV/C)(2); Q(2)=1.75; DEUTERON; RATIO AB The ratio of the electric and magnetic proton form factors, G(Ep)/G(Mp), has been obtained in two Hall A experiments, from measurements of the longitudinal and transverse polarization of the recoil proton, P-L and P-T, respectively, in the elastic scattering of polarized electrons, ep --> ep: Together these experiments cover the Q(2) range 0.5 ' to 5.6 GeV2.. A new experiment is currently being prepared, to extend the Q(2) range to 9 GeV2 in Hall C. C1 Coll William & Mary, Williamsburg, VA 23187 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Perdrisat, CF (reprint author), Coll William & Mary, Williamsburg, VA 23187 USA. NR 34 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 317 EP 321 DI 10.1140/epja/i2002-10173-x PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600005 ER PT J AU Madey, R Semenov, AY Taylor, S Aghalaryan, A Crouse, E MacLachlan, G Plaster, B Tajima, S Tireman, W Yan, CY Ahmidouch, A Anderson, BD Arenhovel, H Asaturyan, R Baker, O Baldwin, AR Breuer, H Carlini, R Christy, E Churchwell, S Cole, L Danagoulian, S Day, D Elaasar, M Ent, R Farkhondeh, M Fenker, H Finn, JM Gan, L Garrow, K Gueye, P Howell, C Hu, B Jones, MK Kelly, JJ Keppel, C Khandaker, M Kim, WY Kowalski, S Lung, A Mack, D Manley, DM Markowitz, P Mitchell, J Mkrtchyan, H Opper, A Perdrisat, C Punjabi, V Raue, B Reichelt, T Reinhold, J Roche, J Sato, Y Semenova, IA Seo, W Simicevic, N Smith, G Stepanyan, S Tadevosyan, V Tang, L Ulmer, P Vulcan, W Watson, JW Wells, S Wesselmann, F Wood, S Yan, C Yang, S Yuan, L Zhang, WM Zhu, H Zhu, X AF Madey, R Semenov, AY Taylor, S Aghalaryan, A Crouse, E MacLachlan, G Plaster, B Tajima, S Tireman, W Yan, CY Ahmidouch, A Anderson, BD Arenhovel, H Asaturyan, R Baker, O Baldwin, AR Breuer, H Carlini, R Christy, E Churchwell, S Cole, L Danagoulian, S Day, D Elaasar, M Ent, R Farkhondeh, M Fenker, H Finn, JM Gan, L Garrow, K Gueye, P Howell, C Hu, B Jones, MK Kelly, JJ Keppel, C Khandaker, M Kim, WY Kowalski, S Lung, A Mack, D Manley, DM Markowitz, P Mitchell, J Mkrtchyan, H Opper, A Perdrisat, C Punjabi, V Raue, B Reichelt, T Reinhold, J Roche, J Sato, Y Semenova, IA Seo, W Simicevic, N Smith, G Stepanyan, S Tadevosyan, V Tang, L Ulmer, P Vulcan, W Watson, JW Wells, S Wesselmann, F Wood, S Yan, C Yang, S Yuan, L Zhang, WM Zhu, H Zhu, X TI Neutron electric form factor up to Q(2)=1.47 (GeV/c)(2) SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID DISPERSION-THEORETICAL ANALYSIS; QUARK-MODEL; NUCLEON; SCATTERING; E'N)P AB The ratio of the electric to the magnetic form factor of the neutron, g equivalent to G(En)/G(Mn), was measured via recoil polarimetry (, R.G. Arnold, C.E. Carlson; F. Gross, Phys. Rev. C 23, 363 (1981)) from the quasielastic H-2((e) over right arrow, e'(n) over right arrow)H-1 reaction at three values of Q(2) (viz,, 0.45, 1.15, and 1.47 (GeV/c)(2)) in Hall C of the Thomas Jefferson National Accelerator Facility. The data reveal that G(En) continues to follow the Galster parameterization Up to Q(2) = 1.15 (GeV/c)(2) and rises above the Galster parameterization at Q(2) = 1.47 (GeV/c)(2). C1 Kent State Univ, Kent, OH 44242 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. MIT, Cambridge, MA 02139 USA. Yerevan Phys Inst, Yerevan 375036, Armenia. Coll William & Mary, Williamsburg, VA 23187 USA. Ohio Univ, Athens, OH 45701 USA. Duke Univ, Durham, NC 27708 USA. N Carolina Agr & Tech State Univ, Greensboro, NC 27411 USA. Univ Mainz, D-55099 Mainz, Germany. Hampton Univ, Hampton, VA 23668 USA. Univ Maryland, College Pk, MD 20742 USA. Univ Virginia, Charlottesville, VA 22904 USA. So Univ New Orleans, New Orleans, LA 70126 USA. Norfolk State Univ, Norfolk, VA 23504 USA. Kyungpook Natl Univ, Taegu 702701, South Korea. Florida Int Univ, Miami, FL 33199 USA. Univ Bonn, D-53115 Bonn, Germany. Louisiana Tech Univ, Ruston, LA 71272 USA. Old Dominion Univ, Norfolk, VA 23508 USA. RP Madey, R (reprint author), Kent State Univ, Kent, OH 44242 USA. RI Zhu, Xiaofeng/B-9493-2011; Day, Donal/C-5020-2015; OI Day, Donal/0000-0001-7126-8934; Wesselmann, Frank/0000-0001-7834-7977 NR 32 TC 3 Z9 3 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 323 EP 327 DI 10.1140/epja/i2002-10169-6 PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600006 ER PT J AU Van Orden, JW Jeschonnek, S AF Van Orden, JW Jeschonnek, S TI Energy-weighted sum rules, y-scaling and duality SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID DEEP-INELASTIC SCATTERING; QUARK-HADRON DUALITY; ANOMALOUS DIMENSIONS; MODEL; MASS AB The phenomena of scaling and Bloom-Gilman duality are examined in the context of simple nonrelativistic and relativistic quantum-mechanical models. These models axe shown to scale and to show the qualitative features of Bloom-Gilman duality. This suggests that these phenomena do not necessarily require the properties of QCD. C1 Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA. Jefferson Lab, Newport News, VA 23606 USA. Ohio State Univ, Dept Phys, Lima, OH 45804 USA. RP Van Orden, JW (reprint author), Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA. OI Jeschonnek, Sabine/0000-0002-8603-7589 NR 17 TC 3 Z9 3 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 391 EP 395 DI 10.1140/epja/i2002-10182-9 PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600018 ER PT J AU Paris, MW AF Paris, MW TI Spacelike and timelike response of confined relativistic particles SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID GEV ELECTRONS; SCATTERING AB Basic theoretical issues relating to the response of confined relativistic particles are considered including the scaling of the response in spacelike and timelike regions of momentum transfer and the role of final-state interactions. A simple single-particle potential model incorporating relativity and linear confinement is solved exactly and its response is calculated. The response is studied in common approximation schemes and it is found that final-state interactions effects persist in the limit that the three-momentum transferred to the target is large. The fact that the particles axe bound leads to a nonzero response in the timelike region of four-momentum transfer equal to about 10% of the total strength. The strength in the timelike region must be taken into account to fulfill the particle number sum rule. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Paris, MW (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA. NR 14 TC 3 Z9 3 U1 0 U2 1 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 401 EP 405 DI 10.1140/epja/i2002-10204-8 PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600020 ER PT J AU Gross, F AF Gross, F TI Electromagnetic structure of the deuteron - Review of recent theoretical and experimental results SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID ELASTIC ELECTRON-SCATTERING; FORM-FACTORS; PHOTODISINTEGRATION; ENERGY AB Recent high-energy measurements of elastic ed scattering support the use of a relativistic theory based on an accurate description of the NN channel, but theory needed for an understanding of the high-energy deuteron photo disintegration cross-sections and polarization observables is not yet mature. C1 Jefferson Lab, Newport News, VA 23606 USA. RP Gross, F (reprint author), Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA. NR 23 TC 9 Z9 10 U1 0 U2 1 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 407 EP 413 DI 10.1140/epja/i2002-10184-7 PG 7 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600021 ER PT J AU de Jager, K AF de Jager, K TI Proton knock-out in Hall A SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID MOMENTUM COMPONENTS; SCATTERING; NUCLEI AB Proton knock-out is studied in a broad program,in Hall A at Jefferson Lab. The first experiment performed in Hall A studied the O-16(e, e'p) reaction. Since then proton knock-out experiments have studied a variety of aspects of that reaction, from single-nucleon Properties to its mechanism, such as final-state interactions and two-body currents, in nuclei from H-2 to O-16. In this review the accomplishments of this program will be summarized and an outlook given of expected future results. C1 Jefferson Lab, Newport News, VA 23606 USA. RP de Jager, K (reprint author), Jefferson Lab, Newport News, VA 23606 USA. EM kees@jlab.org NR 34 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1434-6001 EI 1434-601X J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 423 EP 428 DI 10.1140/epja/i2002-10186-5 PG 6 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600024 ER PT J AU Carlson, J AF Carlson, J TI GFMC studies of low-density neutron matter SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID MONTE-CARLO METHOD; NUCLEAR-MATTER; MODELS; BETHE AB Green's function Monte Carlo methods are used to provide benchmarks for studies of lowdensity neutron matter. The zero-temperature equation of state and pair correlation functions axe studied for the AV8' NN interaction model, and for an idealized model comprised of neutrons with a short-range interaction and an arbitrarily large (negative) scattering length. For this idealized problem the equation of state is a constant multiplied by the Fermi-gas energy; this constant is. found to be nearly 1/2. Similar ratios are found for realistic NN interactions. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM carlson@lanl.gov NR 17 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1434-6001 EI 1434-601X J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 463 EP 467 DI 10.1140/epja/i2002-10193-6 PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600031 ER PT J AU Reddy, S AF Reddy, S TI Neutrino interactions in dense stellar matter SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID COLOR-FLAVOR-LOCKING; NUCLEAR-MATTER; SUPERNOVA CORES; QUARK MATTER; STAR MATTER; QCD; SCATTERING; PHASE; SUPERCONDUCTIVITY; EMISSIVITIES AB Weak-interaction rates play an important role in the birth of neutron stars in core collapse supernova and their subsequent thermal evolution. In this paper, I highlight the role of strong interactions,,. and phase transitions in calculations of neutrino scattering and emission rates in dense stellar matter. C1 MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA. RP Reddy, S (reprint author), Los Alamos Natl Lab, POB 1663,MS B283, Los Alamos, NM 87545 USA. NR 37 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 475 EP 481 DI 10.1140/epja/i2002-10195-4 PG 7 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600033 ER PT J AU Viviani, M Marcucci, LE Kievsky, A Rosati, S Schiavilla, R AF Viviani, M Marcucci, LE Kievsky, A Rosati, S Schiavilla, R TI Electromagnetic and weak transitions in light nuclei SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID D RADIATIVE-CAPTURE; MUON-CAPTURE; EXCHANGE CURRENTS; FORM-FACTORS; HE-3; SCATTERING; TRINUCLEONS; POTENTIALS; THRESHOLD; FREEDOM AB Recent advances in the study of the p-d radiative and mu(-3) He weak capture processes by our group are presented and discussed. The trinucleon bound and scattering states have been obtained from variational calculations by expanding the corresponding wave functions in terms of correlated hyperspherical harmonic functions. The electromagnetic and weak transition currents include one- and two-body operators. The accuracy achieved in these calculations allows for interesting comparisons with experimental data. C1 Ist Nazl Fis Nucl, Sez Pisa, I-56100 Pisa, Italy. Univ Pisa, Dipartimento Fis, I-56100 Pisa, Italy. Jefferson Lab, Newport News, VA 23606 USA. Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA. RP Viviani, M (reprint author), Ist Nazl Fis Nucl, Sez Pisa, Via Buonarroti 2, I-56100 Pisa, Italy. RI kievsky, alejandro/A-7123-2011 NR 36 TC 5 Z9 5 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 483 EP 487 DI 10.1140/epja/i2002-10199-0 PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600034 ER PT J AU Barnes, T AF Barnes, T TI Exotics and all that SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID QQBARG HYBRID MESONS; MIT BAG MODEL; QCD SUM-RULES; FLUX-TUBE MODEL; HERMAPHRODITE BARYONS; 18 GEV/C; DECAY; PHOTOPRODUCTION; QUARKONIA; HADRONS AB This invited contribution summarizes some of the more important aspects of exotics. We review theoretical expectations for exotic and nonexotic hybrid mesons,and briefly discuss the leading experimental candidate for an exotic, the pi(1)(1600). C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RP Barnes, T (reprint author), Oak Ridge Natl Lab, Div Phys, POB 2008, Oak Ridge, TN 37831 USA. NR 46 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 489 EP 492 DI 10.1140/epja/i2002-10196-3 PG 4 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600035 ER PT J AU Radyushkin, AV AF Radyushkin, AV TI Generalized parton distributions SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article; Proceedings Paper CT 7th Conference on Electron-Nucleus Scattering CY JUN 24-28, 2002 CL MARCIANA MARINA, ITALY SP INFN, Jefferson Lab ID COMPTON-SCATTERING; QCD AB An introductory review of generalized parton distributions (GPDs) is given. C1 Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA. Jefferson Lab, Theory Grp, Newport News, VA 23606 USA. RP Radyushkin, AV (reprint author), Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD JUN PY 2003 VL 17 IS 3 BP 493 EP 498 DI 10.1140/epja/i2002-10197-2 PG 6 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 711ZU UT WOS:000184771600036 ER PT J AU Alexa, C Anderson, K Antonaki, A Batusov, V Berglund, S Biscarat, C Blanch, O Blanchot, G Bogush, A Bohm, C Boldea, V Bosman, M Bromberg, C Budagov, J Caloba, L Calvet, D Camarena, F Carvalho, J Castelo, J Castillo, MV Cavalli-Sforza, M Cavasinni, V Cerqueira, AS Cobal, M Cogswell, F Constantinescu, S Costanzo, D Cowan, B Cuenca, C Damazio, DO David, M Davidek, T De, K Delfino, M Del Prete, T Di Girolamo, B Dita, S Dolejsi, J Dolezal, Z Dotti, A Downing, R Efthymiopoulos, I Engstrom, M Errede, D Errede, S Fassi, F Fassouliotis, D Fedorko, I Fenyuk, A Ferdi, C Ferrer, A Flaminio, V Flix, J Fullana, E Garabik, R Garde, V Giakoumopoulou, V Gildemeister, O Gilewsky, V Giokaris, N Gomes, A Gonzalez, V De La Hoz, SG Grabsky, V Grenier, P Gris, P Guarino, V Guicheney, C Gupta, A Hakobyan, H Haney, M Henriques, A Higon, E Holmgren, S Huston, J Iglesias, C Jon-And, K Junk, T Karyukhin, A Khubua, J Kopikov, S Korolkov, I Krivkova, P Kulchitsky, Y Kuzhir, P Lapin, V Le Compte, T Lefevre, R Leitner, R Lembesi, M Li, J Liablin, M Lomakin, Y Lokajicek, M Amengual, JML Maio, A Maliukov, S Manousakis, A Marques, C Marroquim, F Martin, F Mazzoni, E Merritt, F Miller, R Minashvili, I Miralles, L Montarou, G Nemecek, S Nessi, M Nodulman, L Norniella, O Onofre, A Oreglia, M Pacheco, A Pallin, D Pantea, D Pilcher, J Pina, J Pinh-ao, J Podlyski, F Portell, X Price, LE Proudfoot, J Richards, R Roda, C Romanov, V Rosnet, P Roy, P Rumiantsau, V Russakovich, N Salvachua, B Sanchis, E Sanders, H Santoni, C Saraiva, JG Satsunkevitch, I Says, LP Schlereth, J Seixas, JM Sellden, B Shalanda, N Shevtsov, P Shochet, M Silva, J Simaitis, V Sissakian, A Sjolin, J Soares, S Solodkov, A Solovianov, O Sosebee, M Stanek, R Starchenko, E Starovoitov, P Stavina, P Suk, M Sykora, I Tang, F Tas, P Teuscher, R Tokar, S Topilin, N Torres, J Tsulaia, V Underwood, D Usai, G Valkar, S Varanda, MJ Vartapetian, A Vazeille, F Vichou, I Vinogradov, V Vivarelli, I White, A Zaitsev, A Zenis, T AF Alexa, C Anderson, K Antonaki, A Batusov, V Berglund, S Biscarat, C Blanch, O Blanchot, G Bogush, A Bohm, C Boldea, V Bosman, M Bromberg, C Budagov, J Caloba, L Calvet, D Camarena, F Carvalho, J Castelo, J Castillo, MV Cavalli-Sforza, M Cavasinni, V Cerqueira, AS Cobal, M Cogswell, F Constantinescu, S Costanzo, D Cowan, B Cuenca, C Damazio, DO David, M Davidek, T De, K Delfino, M Del Prete, T Di Girolamo, B Dita, S Dolejsi, J Dolezal, Z Dotti, A Downing, R Efthymiopoulos, I Engstrom, M Errede, D Errede, S Fassi, F Fassouliotis, D Fedorko, I Fenyuk, A Ferdi, C Ferrer, A Flaminio, V Flix, J Fullana, E Garabik, R Garde, V Giakoumopoulou, V Gildemeister, O Gilewsky, V Giokaris, N Gomes, A Gonzalez, V De La Hoz, SG Grabsky, V Grenier, P Gris, P Guarino, V Guicheney, C Gupta, A Hakobyan, H Haney, M Henriques, A Higon, E Holmgren, S Huston, J Iglesias, C Jon-And, K Junk, T Karyukhin, A Khubua, J Kopikov, S Korolkov, I Krivkova, P Kulchitsky, Y Kuzhir, P Lapin, V Le Compte, T Lefevre, R Leitner, R Lembesi, M Li, J Liablin, M Lomakin, Y Lokajicek, M Amengual, JML Maio, A Maliukov, S Manousakis, A Marques, C Marroquim, F Martin, F Mazzoni, E Merritt, F Miller, R Minashvili, I Miralles, L Montarou, G Nemecek, S Nessi, M Nodulman, L Norniella, O Onofre, A Oreglia, M Pacheco, A Pallin, D Pantea, D Pilcher, J Pina, J Pinh-ao, J Podlyski, F Portell, X Price, LE Proudfoot, J Richards, R Roda, C Romanov, V Rosnet, P Roy, P Rumiantsau, V Russakovich, N Salvachua, B Sanchis, E Sanders, H Santoni, C Saraiva, JG Satsunkevitch, I Says, LP Schlereth, J Seixas, JM Sellden, B Shalanda, N Shevtsov, P Shochet, M Silva, J Simaitis, V Sissakian, A Sjolin, J Soares, S Solodkov, A Solovianov, O Sosebee, M Stanek, R Starchenko, E Starovoitov, P Stavina, P Suk, M Sykora, I Tang, F Tas, P Teuscher, R Tokar, S Topilin, N Torres, J Tsulaia, V Underwood, D Usai, G Valkar, S Varanda, MJ Vartapetian, A Vazeille, F Vichou, I Vinogradov, V Vivarelli, I White, A Zaitsev, A Zenis, T TI A measurement of the photonuclear interactions of 180 GeV muons in iron SO EUROPEAN PHYSICAL JOURNAL C LA English DT Article ID OF-MASS ENERGY AB The energy spectrum and the cross section of photonuclear interactions of 180 GeV muons in iron were measured at the CERN SPS using prototype modules of the ATLAS hadron calorimeter. The differential cross section (N-A/A)nudsigma/dnu for a union fractional energy loss nu = E-mu/E-mu was measured in the range 0.1 < nu < 1. The integrated cross section (N-A/A) integral(0.1)(1) nudsigma/dnu is (0.26 +/- 0.03(stat) +/- 0.03(syst)) . 10(-6) cm(2) g(-1) in agreement with the theoretical prediction of 0.267 . 10(-6) cm(2)g(-1). The best adjustment of the data to the theory is achieved for the value of sigma(gamma)N = (115 +/- 18(stat) +/- 15(syst))mub of the photon-nucleon cross section for photons with energies in the range from 18 to 180 GeV. C1 Inst Atom Phys, Bucharest, Romania. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Texas, Arlington, TX 76019 USA. Univ Athens, Athens, Greece. Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain. Comenius Univ, Bratislava, Slovakia. Univ Chicago, Chicago, IL 60637 USA. Univ Clermont Ferrand, LPC Clermont Ferrand, CNRS, IN2P3, Clermont Ferrand, France. JINR, Dubna, Russia. Michigan State Univ, E Lansing, MI 48824 USA. CERN, Geneva, Switzerland. Univ Lisbon, LIP, P-1699 Lisbon, Portugal. Univ Lisbon, FCUL, P-1699 Lisbon, Portugal. Univ Coimbra, LIP, Coimbra, Portugal. Univ Coimbra, FCTUC, Coimbra, Portugal. Natl Acad Sci, Inst Phys, Minsk, Byelarus. Natl Ctr Particles & High Energy Phys, Minsk, Byelarus. Univ Pisa, Pisa, Italy. Ist Nazl Fis Nucl, Pisa, Italy. Charles Univ, Prague, Czech Republic. Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic. Inst High Energy Phys, Protvino, Russia. UFRJ, COPPE, EE, Rio De Janeiro, Brazil. Stockholm Univ, S-10691 Stockholm, Sweden. Tbilisi State Univ, HEPI, GE-380086 Tbilisi, Rep of Georgia. Univ Illinois, Champaign, IL 61820 USA. Ctr Mixto Univ Valencia, IFIC, CSIC, E-46100 Burjassot, Valencia, Spain. Yerevan Phys Inst, Yerevan 375036, Armenia. RP Alexa, C (reprint author), Inst Atom Phys, Bucharest, Romania. RI Carvalho, Joao/M-4060-2013; Gonzalez de la Hoz, Santiago/E-2494-2016; Pacheco Pages, Andres/C-5353-2011; Gonzalez Millan, Vicente/J-3023-2012; SANCHIS, ENRIQUE/J-7348-2016; Solodkov, Alexander/B-8623-2017; Zaitsev, Alexandre/B-8989-2017; Alexa, Calin/F-6345-2010; Ferrer, Antonio/H-2942-2015; David, Mario/C-4664-2012; Flix, Josep/G-5414-2012; Kuzhir, Polina/H-8653-2012; Pina, Joao /C-4391-2012; Delfino, Manuel/A-1545-2012; De, Kaushik/N-1953-2013; Nemecek, Stanislav/G-5931-2014; Bosman, Martine/J-9917-2014; Camarena, Francisco/L-9349-2014; Cavalli-Sforza, Matteo/H-7102-2015; Torres, Jose/H-3231-2015 OI Carvalho, Joao/0000-0002-3015-7821; Gonzalez de la Hoz, Santiago/0000-0001-5304-5390; Pacheco Pages, Andres/0000-0001-8210-1734; Gonzalez Millan, Vicente/0000-0001-6014-2586; SANCHIS, ENRIQUE/0000-0002-9689-9131; Solodkov, Alexander/0000-0002-2737-8674; Zaitsev, Alexandre/0000-0002-4961-8368; Ferrer, Antonio/0000-0003-0532-711X; Flix, Josep/0000-0003-2688-8047; Kuzhir, Polina/0000-0003-3689-0837; Pina, Joao /0000-0001-8959-5044; Delfino, Manuel/0000-0002-9468-4751; De, Kaushik/0000-0002-5647-4489; Bosman, Martine/0000-0002-7290-643X; Camarena, Francisco/0000-0002-6713-1414; Torres, Jose/0000-0002-1525-1828 NR 19 TC 3 Z9 3 U1 0 U2 1 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1434-6044 J9 EUR PHYS J C JI Eur. Phys. J. C PD JUN PY 2003 VL 28 IS 3 BP 297 EP 304 DI 10.1140/epjc/s2003-01176-6 PG 8 WC Physics, Particles & Fields SC Physics GA 698CV UT WOS:000183980800001 ER PT J AU Acioli, PH Jellinek, J AF Acioli, PH Jellinek, J TI Theoretical determination of electron binding energy spectra of anionic magnesium clusters SO EUROPEAN PHYSICAL JOURNAL D LA English DT Article; Proceedings Paper CT 11th International Symposium on Small Particles and Inorganic Clusters (ISSPIC 11) CY SEP 09-13, 2002 CL STRASBOURG, FRANCE ID MERCURY CLUSTERS; PHOTOELECTRON-SPECTROSCOPY; SIZE DEPENDENCE; METAL CLUSTERS; MG CLUSTERS; BASIS-SET; TRANSITION; APPROXIMATION; ELEMENTS; BEHAVIOR AB A recently developed accurate scheme for converting the single-particle eigeneriergies of the density functional theory into electron binding energies is used to compute the spectra of electron binding energies in Mg-4(-), Mg-11(-), Mg-16(-), and Mg-18(-). The computations are performed for different isomeric forms of the clusters using both pseudopotential and all-electron treatments. The results are compared with the data derived from electron photodetachment experiments, and the role of the different isomers in the interpretation of these data is examined. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Acioli, PH (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 35 TC 9 Z9 11 U1 0 U2 5 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 1434-6060 J9 EUR PHYS J D JI Eur. Phys. J. D PD JUN PY 2003 VL 24 IS 1-3 BP 27 EP 32 DI 10.1140/epjd/e2003-00176-7 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 710PC UT WOS:000184687800006 ER PT J AU Aranson, IS Tsimring, LS AF Aranson, IS Tsimring, LS TI Dynamics of the constrained polymer collapse SO EUROPHYSICS LETTERS LA English DT Article ID HOMOPOLYMER COLLAPSE; KINETICS; SIMULATION; CHAIN AB The dynamics of polymer collapse with a fixed distance between endpoints is studied analytically and numerically by the Nose-Hoover algorithm. We find that at the pearling stage of the collapse the number of pearls decays as t(-1/2) leading to anomalously long collapse time. To understand the effect of Stokes drag we reduced the problem of long-polymer-chain collapse to the one-dimensional diffusion-limited coalescence of particles with the mass-dependent mobility. In this case the number of pearls decays slower, as t(-3/7). C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Calif San Diego, Inst Nonlinear Sci, La Jolla, CA 92093 USA. RP Aranson, IS (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Aranson, Igor/I-4060-2013 NR 26 TC 6 Z9 6 U1 0 U2 3 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD JUN PY 2003 VL 62 IS 6 BP 848 EP 854 DI 10.1209/epl/i2003-00450-8 PG 7 WC Physics, Multidisciplinary SC Physics GA 686UQ UT WOS:000183339700012 ER PT J AU Mergeay, M Monchy, S Vallaeys, T Auquier, V Benotmane, A Bertin, P Taghavi, S Dunn, J van der Lelie, D Wattiez, R AF Mergeay, M Monchy, S Vallaeys, T Auquier, V Benotmane, A Bertin, P Taghavi, S Dunn, J van der Lelie, D Wattiez, R TI Ralstonia metallidurans, a bacterium specifically adapted to toxic metals: towards a catalogue of metal-responsive genes SO FEMS MICROBIOLOGY REVIEWS LA English DT Review DE Ralstonia metallidurans; heavy metal; resistance gene; Pl-ATPase; genome; proteomics; HME-RND efflux system; plasmid; mobile genetic; element; regulation ID ALCALIGENES-EUTROPHUS CH34; P-TYPE ATPASES; NICKEL RESISTANCE DETERMINANT; CATION-PROTON ANTIPORTER; COMPLETE GENOME SEQUENCE; SP STRAIN CH34; ESCHERICHIA-COLI; HEAVY-METALS; COPPER-RESISTANCE; PSEUDOMONAS-SYRINGAE AB Ralstonia metallidurans, formerly known as Alcaligenes eutrophus and thereafter as Ralstonia eutropha, is a beta-Proteobacterium colonizing industrial sediments, soils or wastes with a high content of heavy metals. The type strain CH34 carries two large plasmids (pMOL28 and pMOL30) bearing a variety of genes for metal resistance. A chronological overview describes the progress made in the knowledge of the plasmid-borne metal resistance mechanisms, the genetics of R. metallidurans CH34 and its taxonomy, and the applications of this strain in the fields of environmental remediation and microbial ecology. Recently, the sequence draft of the genome of R. metallidurans has become available. This allowed a comparison of these preliminary data with the published genome data of the plant pathogen Ralstonia solanacearum, which harbors a megaplasmid (of 2.1 Mb) carrying some metal resistance genes that are similar to those found in R. metallidurans CH34. In addition, a first inventory of metal resistance genes and operons across these two organisms could be made. This inventory, which partly relied on the use of proteomic approaches, revealed the presence of numerous loci not only on the large plasmids pMOL28 and pMOL30 but also on the chromosome. It suggests that metal-resistant Ralstonia, through evolution, are particularly well adapted to the harsh environments typically created by extreme anthropogenic situations or biotopes. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved. C1 CEN SCK, Belgium Nucl Res Ctr, Labs Microbiol & Radiobiol, B-2400 Mol, Belgium. Flemish Inst Technol Res, Environm Technol Expertise Ctr, B-2400 Mol, Belgium. Free Univ Brussels, Unite Etud Conformat Macromol Biol, B-1050 Brussels, Belgium. INRA, Dept Microbiol, Jouy En Josas, France. Free Univ Brussels, Ctr Biol Struct & Bioinformat Struct & Fonct Memb, B-1050 Brussels, Belgium. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. Univ Mons, Serv Chim Biol, B-7000 Mons, Belgium. RP Mergeay, M (reprint author), CEN SCK, Belgium Nucl Res Ctr, Labs Microbiol & Radiobiol, B-2400 Mol, Belgium. RI Mergeay, Max/H-2003-2011 NR 151 TC 234 Z9 251 U1 5 U2 55 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-6445 J9 FEMS MICROBIOL REV JI Fems Microbiol. Rev. PD JUN PY 2003 VL 27 IS 2-3 BP 385 EP 410 DI 10.1016/S0168-6445(03)00045-7 PG 26 WC Microbiology SC Microbiology GA 693XW UT WOS:000183744500014 PM 12829276 ER PT J AU Suslov, VM Soldi, A Vlahovic, B AF Suslov, VM Soldi, A Vlahovic, B TI Nucleon-deuteron breakup scattering in configuration space SO FEW-BODY SYSTEMS LA English DT Article ID BENCHMARK SOLUTIONS; CONTINUUM; FORCE AB The configuration-space Faddeev equations for the breakup scattering problem are solved using a new method of partial inversion. Unlike other computations this one keeps the incoming wave in the asymptotic condition. Thus all computations otherwise needed to separate the incident wave are avoided and the number of non-zero components of the inhomogeneous term in the algebraic equations is reduced to one. Speed as well as accuracy improves and we are able to solve the algebraic problem with partial inversion only. Using the standard spline-decomposition for the angle variable and the finite-difference approximation for the hyperradius optimizes considerably the inversion due to the sparse block structure of the matrix. We report on calculations of the inelasticities and phase shifts for nucleon-deuteron scattering for laboratory energies 4.0, 14.1, and 42.0 MeV. The results are compared with calculations by other authors. C1 St Petersburg State Univ, Inst Phys, Dept Math & Comp Phys, St Petersburg 198504, Russia. N Carolina Cent Univ, Dept Phys, Durham, NC 27707 USA. Jefferson Lab, Newport News, VA 23606 USA. RP Suslov, VM (reprint author), St Petersburg State Univ, Inst Phys, Dept Math & Comp Phys, Ulyanovskaya 1, St Petersburg 198504, Russia. NR 15 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER-VERLAG WIEN PI VIENNA PA SACHSENPLATZ 4-6, PO BOX 89, A-1201 VIENNA, AUSTRIA SN 0177-7963 J9 FEW-BODY SYST JI Few-Body Syst. PD JUN PY 2003 VL 32 IS 4 BP 219 EP 228 DI 10.1007/s00601-003-0002-6 PG 10 WC Physics, Multidisciplinary SC Physics GA 700DY UT WOS:000184098400003 ER PT J AU Karnosky, DF Zak, DR Pregitzer, KS Awmack, CS Bockheim, JG Dickson, RE Hendrey, GR Host, GE King, JS Kopper, BJ Kruger, EL Kubiske, ME Lindroth, RL Mattson, WJ Mcdonald, EP Noormets, A Oksanen, E Parsons, WFJ Percy, KE Podila, GK Riemenschneider, DE Sharma, P Thakur, R Sober, A Sober, J Jones, WS Anttonen, S Vapaavuori, E Mankovska, B Heilman, W Isebrands, JG AF Karnosky, DF Zak, DR Pregitzer, KS Awmack, CS Bockheim, JG Dickson, RE Hendrey, GR Host, GE King, JS Kopper, BJ Kruger, EL Kubiske, ME Lindroth, RL Mattson, WJ Mcdonald, EP Noormets, A Oksanen, E Parsons, WFJ Percy, KE Podila, GK Riemenschneider, DE Sharma, P Thakur, R Sober, A Sober, J Jones, WS Anttonen, S Vapaavuori, E Mankovska, B Heilman, W Isebrands, JG TI Tropospheric O-3 moderates responses of temperate hardwood forests to elevated CO2: a synthesis of molecular to ecosystem results from the Aspen FACE project SO FUNCTIONAL ECOLOGY LA English DT Review DE aggrading aspen forest; carbon budgets; carbon sequestration; interacting pollutants ID POPULUS-TREMULOIDES CLONES; ATMOSPHERIC CARBON-DIOXIDE; TREMBLING ASPEN; BIOMASS ALLOCATION; GROWTH-RESPONSES; SOYBEAN RESPONSE; GENETIC-CONTROL; AMBIENT OZONE; AIR-POLLUTION; SPRING WHEAT AB 1. The impacts of elevated atmospheric CO2 and/or O-3 have been examined over 4 years using an open-air exposure system in an aggrading northern temperate forest containing two different functional groups (the indeterminate, pioneer, O-3-sensitive species Trembling Aspen, Populus tremuloides and Paper Birch, Betula papyrifera , and the determinate, late successional, O-3-tolerant species Sugar Maple, Acer saccharum). 2. The responses to these interacting greenhouse gases have been remarkably consistent in pure Aspen stands and in mixed Aspen/Birch and Aspen/Maple stands, from leaf to ecosystem level, for O-3-tolerant as well as O-3-sensitive genotypes and across various trophic levels. These two gases act in opposing ways, and even at low concentrations (1.5 x ambient, with ambient averaging 34-36 nL L-1 during the summer daylight hours), O-3 offsets or moderates the responses induced by elevated CO2. 3. After 3 years of exposure to 560 mumol mol(-1) CO2, the above-ground volume of Aspen stands was 40% above those grown at ambient CO2, and there was no indication of a diminishing growth trend. In contrast, O-3 at 1.5 x ambient completely offset the growth enhancement by CO2, both for O-3-sensitive and O-3-tolerant clones. Implications of this finding for carbon sequestration, plantations to reduce excess CO2, and global models of forest productivity and climate change are presented. C1 Michigan Technol Univ, Sch Forest Resources & Environm Sci, Houghton, MI 49931 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Univ Wisconsin, Madison, WI 53706 USA. US Forest Serv, USDA, N Cent Res Stn, Forestry Sci Lab, Rhinelander, WI 54501 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Minnesota, Nat Resources Res Inst, Duluth, MN 55811 USA. Univ Toledo, Dept EEES, LEES Lab, Toledo, OH 43606 USA. Univ Kuopio, FIN-70211 Kuopio, Finland. Nat Resources Canada, Canadian Forest Serv, Fredericton, NB E3B 5P7, Canada. Univ Alabama, Dept Biol Sci, Huntsville, AL 35899 USA. Estonian Inst Ecol, EE-2400 Tartu, Estonia. Suonenjoki Res Stn, FIN-77600 Suonenjoki, Finland. Forestry Res Inst Zvolen, Zvolen 96092, Slovakia. US Forest Serv, USDA, E Lansing, MI 48823 USA. Environm Forestry Consultants LLC, New London, WI 54961 USA. RP Karnosky, DF (reprint author), Michigan Technol Univ, Sch Forest Resources & Environm Sci, 1400 Townsend Dr, Houghton, MI 49931 USA. RI Noormets, Asko/A-7257-2009; Lindroth, Richard/A-8538-2009; Zak, Donald/C-6004-2012 OI Noormets, Asko/0000-0003-2221-2111; Lindroth, Richard/0000-0003-4587-7255; NR 109 TC 202 Z9 211 U1 2 U2 48 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 0269-8463 J9 FUNCT ECOL JI Funct. Ecol. PD JUN PY 2003 VL 17 IS 3 BP 289 EP 304 DI 10.1046/j.1365-2435.2003.00733.x PG 16 WC Ecology SC Environmental Sciences & Ecology GA 687FA UT WOS:000183364400001 ER PT J AU Swain, DW Carter, MD Wilson, JR Ryan, PM Wilgen, JB Hosea, J Rosenberg, A AF Swain, DW Carter, MD Wilson, JR Ryan, PM Wilgen, JB Hosea, J Rosenberg, A TI Loading and asymmetry measurements and modeling for the national spherical torus experiment ion cyclotron range of frequencies system SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article DE ion cyclotron heating; plasma loading; asymmetry ID CURRENT DRIVE; NSTX; OPERATION; PLASMAS AB The ion cyclotron heating and current drive system on the National Spherical Torus Experiment (NSTX) has delivered over 3 MW reliably for pulse lengths over 100 ms with various phasings of the antennas. A circuit model of the system that includes the 12 coupled antennas and six radio-frequency sources has been developed that gives good agreement with vacuum measurements. When it is used to experimentally determine the S-matrix of the system under different plasma conditions, pronounced asymmetries in the off-diagonal values of the S-matrix are seen. The S-matrix in the presence of plasma has been calculated with the RANT3D code using measured edge density profiles in front of the antenna; these agree remarkably well with the measurements. The asymmetry is caused primarily by the large pitch angle of the magnetic field in front of the antenna, coupled with the gradients in the plasma edge. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Princeton Plasma Phys Lab, Princeton, NJ 08544 USA. RP Swain, DW (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 15 TC 7 Z9 7 U1 0 U2 5 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD JUN PY 2003 VL 43 IS 4 BP 503 EP 513 PG 11 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 678BC UT WOS:000182844200002 ER PT J AU Nobile, A Reichert, H Janezic, RT Harding, DR Lund, LD Shmayda, WT AF Nobile, A Reichert, H Janezic, RT Harding, DR Lund, LD Shmayda, WT TI Design of the omega laser target chamber tritium removal system SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article DE tritium removal; laserfusion; process design ID CATALYTIC-OXIDATION; LAYERS; PALLADIUM; METHANE; SURFACE; GAS AB Preparations are currently underway at the OMEGA laser at the University of Rochester Laboratory for Laser Energetics (UR/LLE) to conduct direct drive laser implosion campaigns with inertial confinement fusion targets containing deuterium-tritium (DT) cryogenic ice layers. The OMEGA Cryogenic Target Handling System will fill plastic targets with high-pressure DT (150 MPa) at 300 to 500 K, cool them down to cryogenic temperature (<25 K), form the DT ice layer, and transport the targets to the OMEGA laser target chamber. Targets will then be shot with the 60-beam 30-kJ OMEGA laser. A tritium removal system has been designed to remove tritium from effluents associated with operation of the target chamber and its associated diagnostic antechambers, vacuum pumping systems, and target insertion systems. The design of the target chamber tritium removal system (TCTRS) is based on catalytic oxidation of DT and tritiated methane to tritiated water (DTO), followed by immobilization of DTO on molecular sieves. The design of the TCTRS presented a challenge due to the low tritium release limits dictated by the tritium license at UR/LLE. Aspen Plus, a commercial software package intended for the simulation and design of chemical processing systems operating at steady state, was used to simulate and design the TCTRS. A second commercial software package, Aspen ADSIM, was used to simulate and design the TCTRS molecular sieve beds, which operate at unsteady state. In this paper, we describe the design of the TCTRS and the benefits that were realized by use of the Aspen Plus and Aspen ADSIM software packages. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87544 USA. Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA. RP Nobile, A (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Mail Stop E894, Los Alamos, NM 87544 USA. NR 24 TC 2 Z9 2 U1 1 U2 10 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD JUN PY 2003 VL 43 IS 4 BP 522 EP 539 PG 18 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 678BC UT WOS:000182844200004 ER PT J AU Latkowski, JF Kubota, A Caturla, MJ Dixit, SN Speth, JA Payne, SA AF Latkowski, JF Kubota, A Caturla, MJ Dixit, SN Speth, JA Payne, SA TI Fused silica final optics for inertial fusion energy: Radiation studies and system-level analysis SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article DE inertial fusion; final optic; radiation damage ID SOLID-STATE LASER; AMORPHOUS-SILICON; SINGLE-CRYSTALS; SIO2; NEUTRON; DAMAGE; DEFECTS; ACCUMULATION; IRRADIATION; CENTERS AB The survivability of the final optic, which must sit in the line of sight of high-energy neutrons and gamma rays, is a key issue for any laser-driven inertial fusion energy (IFE) concept. Previous work has concentrated on the use of reflective optics. Here, we introduce and analyze the use of a transmissive final optic for the IFE application. Our experimental work has been conducted at a range of doses and dose rates, including those comparable to the conditions at the IFE final optic. The experimental work, in conjunction with detailed analysis, suggests that a thin, fused silica Fresnel lens may be an attractive option when used at a wavelength of 351 nm. Our measurements and molecular dynamics simulations provide convincing evidence that the radiation damage, which leads to optical absorption, not only saturates but that a "radiation annealing " effect is observed. A system level description is provided, including Fresnel lens and phase plate designs. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Latkowski, JF (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,Mailstop L-641, Livermore, CA 94550 USA. RI Caturla, Maria /D-6241-2012 OI Caturla, Maria /0000-0002-4809-6553 NR 53 TC 26 Z9 26 U1 0 U2 8 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD JUN PY 2003 VL 43 IS 4 BP 540 EP 558 PG 19 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 678BC UT WOS:000182844200005 ER PT J AU Passamonti, M Boore, JL Scali, V AF Passamonti, M Boore, JL Scali, V TI Molecular evolution and recombination in gender-associated mitochondrial DNAs of the manila clam Tapes philippinarum SO GENETICS LA English DT Article ID MARINE MUSSEL MYTILUS; BLUE MUSSEL; SEQUENCE; POPULATION; BIVALVIA; EDULIS; AMPLIFICATION; MYTILIDAE; MOLLUSCA; GENOME AB Doubly uniparental inheritance (DUI) provides an intriguing system for addressing aspects of molecular evolution and intermolecular recombination of mitochondrial DNA. For this reason, a large sequence analysis has been performed on Tapes philippinarum (Bivalvia, Veneridae), which has mitochondrial DNA heteroplasmy that is consistent with a DUI. The sequences of a 9.2-kb region (containing 29 genes) from 9 individuals and the sequences of a single gene from another 44 individuals are analyzed. Comparisons suggest that the two sex-related mitochondrial genomes do not experience a neutral pattern of divergence and that selection may act with varying strength on different genes. This pattern of evolution may be related to the long, separate history of M and F genomes within their tissue-specific "arenas." Moreover, our data suggest that recombinants, although occurring in soma, may seldom be transmitted to progeny in T. philippinarum. C1 Univ Bologna, Dipartimento Biol Evoluzionist Sperimentale, I-40126 Bologna, Italy. US DOE, Joint Genome Inst, Walnut Creek, CA 94598 USA. Lawrence Berkeley Lab, Walnut Creek, CA 94598 USA. RP Passamonti, M (reprint author), Univ Bologna, Dipartimento Biol Evoluzionist Sperimentale, Via Selmi 3, I-40126 Bologna, Italy. RI Passamonti, Marco/J-7502-2012; OI Passamonti, Marco/0000-0002-6222-8225 NR 51 TC 46 Z9 49 U1 2 U2 6 PU GENETICS PI BALTIMORE PA 428 EAST PRESTON ST, BALTIMORE, MD 21202 USA SN 0016-6731 J9 GENETICS JI Genetics PD JUN PY 2003 VL 164 IS 2 BP 603 EP 611 PG 9 WC Genetics & Heredity SC Genetics & Heredity GA 696GV UT WOS:000183880000021 PM 12807780 ER PT J AU Shannon, M Hamilton, AT Gordon, L Branscomb, E Stubbs, L AF Shannon, M Hamilton, AT Gordon, L Branscomb, E Stubbs, L TI Differential expansion of zinc-finger transcription factor loci in homologous human and mouse gene clusters SO GENOME RESEARCH LA English DT Article ID HUMAN-CHROMOSOME 19Q; PROTEINS; DNA; REPRESSION; EVOLUTION; SELECTION; RECEPTORS; FAMILIES; REGIONS; DOMAINS AB Mammalian genomes carry hundreds of Kruppel-type zinc finger (ZNF) genes, most of which reside in familial Clusters. ZNF genes encoding Kruppel-associated box (KRAB) motifs are especially prone to this type of tandem organization. Despite their prevalence, little is known about the functions or evolutionary histories of these clustered gene families. Here we describe a homologous pair of human and mouse KRAB-ZNF gene clusters containing 21 human and 10 mouse genes, respectively. Evolutionary analysis uncovered only three pairs of putative orthologs and two cases where a single gene in one species is related to multiple genes in the other; several human genes have no obvious homolog in mouse. We deduce that duplication and loss of ancestral Cluster members occurred independently in the primate and rodent lineages after divergence, yielding substantially different ZNF gene repertoires in humans and mice. Differences in expression patterns and sequence divergence within the DNA binding regions of predicted proteins suggest that the duplicated genes have acquired novel functions over evolutionary time. Since KRAB-ZNF proteins are predicted to function as transcriptional regulators, the elaboration of new lineage-specific genes in this and other Clustered ZNF families is likely to have had a significant impact on species-specific aspects of biology. C1 Lawrence Livermore Natl Lab, Genome Biol Div, Livermore, CA 94550 USA. US DOE, Joint Genome Inst, Walnut Creek, CA USA. RP Stubbs, L (reprint author), Lawrence Livermore Natl Lab, Genome Biol Div, Livermore, CA 94550 USA. OI Stubbs, Lisa/0000-0002-9556-1972 NR 36 TC 75 Z9 91 U1 0 U2 5 PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT PI WOODBURY PA 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2924 USA SN 1088-9051 J9 GENOME RES JI Genome Res. PD JUN PY 2003 VL 13 IS 6 BP 1097 EP 1110 DI 10.1101/gr.963903 PG 14 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity GA 686XP UT WOS:000183346500006 PM 12743021 ER PT J AU Santini, S Boore, JL Meyer, A AF Santini, S Boore, JL Meyer, A TI Evolutionary conservation of regulatory elements in vertebrate Hox gene clusters SO GENOME RESEARCH LA English DT Article ID HOMEODOMAIN BINDING-SITES; DNA-SEQUENCE RECOGNITION; HOMEOBOX GENE; TRANSCRIPTIONAL ACTIVATION; GENOMIC ORGANIZATION; FUNCTIONAL ELEMENTS; NONCODING SEQUENCES; FLOW-CYTOMETRY; NUCLEAR FACTOR; FUGU-RUBRIPES AB Comparisons of DNA sequences among evolutionarily distantly related genomes permit identification of conserved functional regions in noncoding DNA. Hox genes are highly conserved in vertebrates, occur in clusters, and are uninterrupted by other genes. We aligned (PipMaker) the nucleotide sequences of the HoxA clusters of tilapia, pufferfish, striped bass, zebrafish, horn shark, human, and mouse, which are separated by approximately 500 million years of evolution. In support of our approach, several identified putative regulatory elements known to regulate the expression of Hox genes were recovered. The majority of the newly identified putative regulatory elements contain short fragments that are almost completely conserved and are identical to known binding sites for regulatory proteins (Transfac database). The regulatory intergenic regions located between the genes that are expressed most anteriorly in the embryo are longer and apparently more evolutionarily conserved than those at the other end of Hox clusters. Different presumed regulatory sequences are retained in either the Aalpha or Abeta duplicated Hox clusters in the fish lineages. This suggests that the conserved elements are involved in different gene regulatory networks and supports the duplication-deletion-complementation model of functional divergence of duplicated genes. C1 Univ Konstanz, Dept Biol, D-78457 Constance, Germany. Univ Calif Berkeley, Berkeley, CA 94720 USA. US DOE, Dept Evolutionary Genomics, Joint Genome Inst, Berkeley, CA 94720 USA. RP Meyer, A (reprint author), Univ Konstanz, Dept Biol, D-78457 Constance, Germany. RI Meyer, Axel/C-9826-2009 OI Meyer, Axel/0000-0002-0888-8193 NR 78 TC 98 Z9 98 U1 1 U2 14 PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT PI WOODBURY PA 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2924 USA SN 1088-9051 J9 GENOME RES JI Genome Res. PD JUN PY 2003 VL 13 IS 6 BP 1111 EP 1122 DI 10.1101/gr.700503 PG 12 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity GA 686XP UT WOS:000183346500007 PM 12799348 ER PT J AU Foster, AL Brown, GE Parks, GA AF Foster, AL Brown, GE Parks, GA TI X-ray absorption fine structure study of As(V) and Se(IV) sorption complexes on hydrous Mn oxides SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Article ID BOND-VALENCE DETERMINATION; CRYSTAL-STRUCTURE; SYNTHETIC BIRNESSITE; MANGANESE OXIDE; REDUCTIVE DISSOLUTION; SURFACE COMPLEXATION; ARSENIC SPECIATION; REACTION-MECHANISM; WATER INTERFACES; LAKE-SEDIMENTS AB X-ray absorption fine structure (XAFS) spectroscopic analysis at the As, Se, and Mn K-edges was used to study arsenate [As(V)O-4(3-)] and selenite [Se(IV)O-3(2-)] sorption complexes on the synthetic hydrous manganese oxides (HMOs) vernadite (delta-MnO2) and K-birnessite (nominal composition: K4Mn14O27.9H(2)O). No significant changes were observed in sorption complex structure as a function of sorbent, pH (5 to 8), surface coverage (0.04 to 0.73 mumol/m(2)), or reaction time (5 to 22 h) in the arsenate or selenite systems. In the arsenate/HMO system, extended XAFS parameters indicate an average second-neighbor As(V) coordination of 2.0 +/- 0.4 Mn at an average distance of 3.16 +/- 0.01 Angstrom, which is consistent with formation of AS(V)O-4 sorption complexes sharing corners with two adjacent Mn(IV)O-6 surface species (i.e., bidentate, binuclear). In the selenite/HMO system, selenite surface complexes are surrounded by two shells of Mn atoms, which could represent two different adsorption complexes or a precipitate. The first shell consists of 1.6 +/- 0.4 Mn at 3.07 +/- 0.01 Angstrom, which is consistent with the selenite anion forming bidentate (mononuclear) edge-sharing complexes with Mn(II)O-6 or Mn(III)O-6 octahedra. The second shell consists of 1.4 +/- 0.4 Mn at 3.49 +/- 0.03 Angstrom, consistent with selenite forming monodentate, corner-sharing complexes with Mn(II)O-6 or Mn(III)O-6 octahedra. Pauling bond valence analysis that uses the extended XAFS-derived bond lengths for As(V)-O, Se(IV)-O, and Mn-O bonds indicates that the proposed surface complexes of selenite and arsenate on HMOs should be stable. Although a nearly identical Se(IV) coordination environment is found in a crystalline Mn(II)-Se(IV) precipitate (which has a structure similar to that of MnSeO3 . H2O), there are significant differences in the X-ray absorption near-edge structure and extended XAFS spectra of this precipitate and the selenite/HMO sorption samples. These differences coupled with transmission electron microscopy results suggest that if a precipitate is present it lacks long-range order characteristic of crystalline MnSeO3 . H2O. Copyright (C) 2003 Elsevier Science Ltd. C1 Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA. SLAC, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. RP Foster, AL (reprint author), US Geol Survey, 345 Middlefield Rd,MS 901, Menlo Pk, CA 94025 USA. NR 66 TC 115 Z9 126 U1 12 U2 57 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD JUN PY 2003 VL 67 IS 11 BP 1937 EP 1953 DI 10.1016/S0016-7037(00)01301-7 PG 17 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 679ZM UT WOS:000182951900001 ER PT J AU Amonette, JE Kukkadapu, RK Alp, EE Sturhahn, W Toellner, TS AF Amonette, JE Kukkadapu, RK Alp, EE Sturhahn, W Toellner, TS TI Heterogeneous electron-transfer kinetics with synchrotron Fe-57 Mossbauer spectroscopy SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Article ID NUCLEAR RESONANT SCATTERING; HYDROTALCITE-LIKE COMPOUNDS; LAYERED DOUBLE HYDROXIDES; SULFATE GREEN RUST; ENERGY; ANION; RESOLUTION; REDUCTION; XANES; MINERALS AB In the first known kinetic application of the technique, synchrotron Fe-57-Mossbauer spectroscopy was used to follow the rate of heterogeneous electron transfer between aqueous reagents and a solid phase containing Fe. The solid, a synthetic Fe-57-enriched Fe(III)-bearing pyroaurite-like phase having terephthalate (TA) in the interlayer [Mg3Fe(OH)(8)(TA)(0.5) . 2H(2)O] was reduced by Na2S2O4 and then reoxidized by K2Cr2O7 by means of a novel flow-through cell. Synchrotron Mossbauer spectra were collected in the time domain at 30-s intervals. Integration of the intensity obtained during a selected time interval in the spectra allowed sensitive determination of Fe(II) content as a function of reaction time. Analysis of reaction end member specimens by both the synchrotron technique and conventional Mossbauer spectroscopy yielded comparable values for Mossbauer parameters such as center shift and Fe(II)/Fe(III) area ratios. Slight differences in quadrupole splitting values were observed, however. A reactive diffusion model was developed that fit the experimental Fe(II) kinetic data well and allowed the extraction of second-order rate constants for each reaction. Thus, in addition to rapidly collecting high quality Mossbauer data, the synchrotron technique seems well suited for aqueous rate experiments as a result of the penetrating power of 14.4 keV X-rays and high sensitivity to Fe valence state. Copyright (C) 2003 Elsevier Science Ltd. C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Amonette, JE (reprint author), Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. NR 33 TC 1 Z9 1 U1 1 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD JUN PY 2003 VL 67 IS 12 BP 2109 EP 2116 DI 10.1016/S0016-7037(00)01346-7 PG 8 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 691LT UT WOS:000183608300001 ER PT J AU Finkel, RC Owen, LA Barnard, PL Caffee, MW AF Finkel, RC Owen, LA Barnard, PL Caffee, MW TI Beryllium-10 dating of Mount Everest moraines indicates a strong monsoon influence and glacial synchroneity throughout the Himalaya SO GEOLOGY LA English DT Article DE cosmogenic radionuclides; Himalaya; glacial geology; geochronology; monsoon; Everest ID LATE QUATERNARY GLACIATIONS; NORTHERN PAKISTAN; ICE CORE; NEPAL; MAXIMUM; VALLEY AB Moraine successions in glaciated valleys south of Mount Everest provide evidence for at least eight glacial advances during the late Quaternary. Cosmogenic radionuclide (CRN) surface exposure dating of moraine boulders defines the timing of each glacial advance and refines the previous glacial chronologies. The CRN data show that glaciation was most extensive during the early part of the last glacial (marine oxygen isotype stage [MIS] 3 and earlier), but limited during MIS 2 (the global Last Glacial Maximum) and the Holocene. A previously assumed Neoglacial advance is dated to 3.6 +/- 0.3 ka and the CRN dates confirm a glacial advance ca. 1 ka. These results show that glaciations on the south side of Everest were not synchronous with the advance of Northern Hemisphere ice sheets, yet glaciations within the Himalaya, the world's highest mountain belt, were synchronous during the late Quaternary. The existence of glacial advances during times of increased insolation suggests that enhanced moisture delivered by an active south Asian summer monsoon is largely responsible for glacial advances in this part of the Himalaya. These data allow us to quantify the importance of global climate change and monsoon influence on glaciation in the Himalaya. C1 Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. Univ Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA. RP Finkel, RC (reprint author), Purdue Univ, Dept Phys, PRIME Lab, W Lafayette, IN 47907 USA. RI Caffee, Marc/K-7025-2015 OI Caffee, Marc/0000-0002-6846-8967 NR 27 TC 114 Z9 123 U1 2 U2 14 PU GEOLOGICAL SOC AMERICA, INC PI BOULDER PA PO BOX 9140, BOULDER, CO 80301-9140 USA SN 0091-7613 J9 GEOLOGY JI Geology PD JUN PY 2003 VL 31 IS 6 BP 561 EP 564 DI 10.1130/0091-7613(2003)031<0561:BDOMEM>2.0.CO;2 PG 4 WC Geology SC Geology GA 685PK UT WOS:000183272300023 ER PT J AU Bloomfield, KK Moore, JN AF Bloomfield, KK Moore, JN TI Modeling hydrofluorocarbon compounds as geothermal tracers SO GEOTHERMICS LA English DT Article DE tracers; phase behavior; reservoir simulation; Cove Fort-Sulphurdale; Utah (USA) AB The Cove Fort-Sulphurdale geothermal resource, Utah (USA), produces from a shallow steam cap and a deeper liquid resource. In January 1999, a tracer test utilizing liquid and vapor-phase tracers was conducted to establish possible links between the injection and production wells. The quantity of tracers required for the test was estimated using the three-dimensional, multi-component, thermal reservoir simulator TETRAD. The simulations incorporated the phase behavior of the vapor-phase tracer, R-134a. Despite limited production data, well productivities, possible aquifer configurations and the total reservoir production were matched. The results showed that the predicted tracer return curves are sensitive to the positions of the discharge and recharge aquifers. The best match of the measured and predicted tracer concentrations was obtained when the recharge aquifer was placed to the east of the field and discharge occurred to the west. Published by Elsevier Science Ltd on behalf of CNR. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. Energy & Geosci Inst, Salt Lake City, UT 84108 USA. RP Bloomfield, KK (reprint author), Idaho Natl Engn & Environm Lab, 2525 Freemont Ave, Idaho Falls, ID 83415 USA. NR 12 TC 1 Z9 1 U1 3 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0375-6505 J9 GEOTHERMICS JI Geothermics PD JUN PY 2003 VL 32 IS 3 BP 203 EP 218 DI 10.1016/S0375-6505(03)00017-8 PG 16 WC Energy & Fuels; Geosciences, Multidisciplinary SC Energy & Fuels; Geology GA 687RM UT WOS:000183390500001 ER PT J AU Gritto, R Daley, TM Majer, EL AF Gritto, R Daley, TM Majer, EL TI Estimating subsurface topography from surface-to-borehole seismic studies at the Rye Patch geothermal reservoir, Nevada, USA SO GEOTHERMICS LA English DT Article DE geophysics; seismics; surface-to-borehole survey; Nevada, USA ID LONG-VALLEY CALDERA; CALIFORNIA AB A 3-D surface seismic reflection survey, covering an area of over 7.7 km(2), was conducted at the Rye Patch geothermal reservoir (Nevada, USA) to explore the structural features that may control geothermal production in the area. In addition to the surface sources and receivers, a high-temperature three-component seismometer was deployed in a borehole at a depth of 1250 m within the basement below the reservoir, which recorded the waves generated by all surface sources. The objective of this study was to determine the subsurface structure of the reservoir based on this surface-to-borehole dataset. A total of 1959 first-arrival travel times were determined out of 2134 possible traces. Two-dimensional ray tracing was performed to simulate wave propagation from the surface sources to the receiver at depth. The ray tracing was based on a 2-D laterally homogeneous velocity model derived from results of a vertical-seismic-profile (VSP) experiment recorded in the same well. The method is an approximation where it is assumed that differences in travel time between the observed and modeled data are caused by structural deviations from a homogeneously layered model as estimated by the VSP profile, and thus are mapped into topographic changes at depth. The results indicate, to first order, the presence of two dominant geologic features. The first observation is consistent with the regional trend of the geologic units in the Basin and Range province with a north-south strike and dip to the west, as expected for this area west of the Humboldt Thrust Range. The second is a local feature in the form of an east-west ridge. The geometry of the structure is corroborated by results from a seismic-reflection survey, and by results of a gravity survey conducted in the area above the reservoir. (C) 2003 CNR. Published by Elsevier Science Ltd. All rights reserved. C1 Lawrence Berkeley Natl Lab, Ctr Computat Seismol, Div Earth Sci, Berkeley, CA 94720 USA. RP Gritto, R (reprint author), Lawrence Berkeley Natl Lab, Ctr Computat Seismol, Div Earth Sci, 1 Cyclotron Rd,MS90-1116, Berkeley, CA 94720 USA. RI Daley, Thomas/G-3274-2015 OI Daley, Thomas/0000-0001-9445-0843 NR 16 TC 3 Z9 3 U1 0 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0375-6505 J9 GEOTHERMICS JI Geothermics PD JUN PY 2003 VL 32 IS 3 BP 275 EP 295 DI 10.1016/S0375-6505(03)00022-1 PG 21 WC Energy & Fuels; Geosciences, Multidisciplinary SC Energy & Fuels; Geology GA 687RM UT WOS:000183390500004 ER PT J AU Dodoo-Amoo, DNA Landsberger, S MacDonald, JM Castro, JM AF Dodoo-Amoo, DNA Landsberger, S MacDonald, JM Castro, JM TI Development of composite materials for non-leaded gloves for use in radiological hand protection SO HEALTH PHYSICS LA English DT Article DE occupational safety; radiation protection; lead; shielding ID EXPLOSIVE COMPOUNDS; RUBBER GLOVES AB Lead is a hazardous material, and the U.S. Congress has mandated the rapid reduction of all hazardous waste generation as a matter of national policy. With the large amount of plutonium handling in numerous projects including the development of mixed oxide (MOX) fuel, Pu-238 power sources, etc., hand glove protection for the emitted alpha, beta, and low energy photons is an important issue. Leaded gloves are the prime shields used for radiological hand protection. U.S. Department of Energy laboratories require a substitute material for the lead oxide in the gloves as a way to reduce mixed waste. To solve this problem, a new blend of non-hazardous materials that have the same radiological properties and approximately the same cost of production have been investigated. The investigations have produced alternative materials using calculations and experiments. The selection of the constituent compounds for the new composite materials was based on the k-absorption edge energy of the main constituent element(s) in the compounds. The formulations of these composites were fashioned on the principle of blending Neoprene rubber formulation with several constituent compounds. Calculations based on the Lambert-Beer attenuation law together with the mass attenuation coefficient values from the XCOM cross section database program were used to determine the transmission fractions of these proposed composite materials. Selected composite materials that compared favorably with the leaded-Neoprene were fabricated. These fabricated composite materials were tested with attenuation experiments and the results were in excellent agreement with the calculations using the Lambert-Beer attenuation law. C1 Univ Texas, Nucl Engn Teaching Lab, Austin, TX 78712 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Landsberger, S (reprint author), Univ Texas, Nucl Engn Teaching Lab, Pickle Res Campus,R-9000, Austin, TX 78712 USA. EM s.landsberger@mail.utexas.edu NR 11 TC 1 Z9 1 U1 0 U2 4 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 BP 737 EP 746 DI 10.1097/00004032-200306000-00006 PG 10 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 682XL UT WOS:000183117600006 PM 12822583 ER PT J AU Cossairt, JD Mokhov, NV AF Cossairt, JD Mokhov, NV TI Assessment of the prompt radiation hazards of trapped antiprotons SO HEALTH PHYSICS LA English DT Article DE dose assessment; photons; shielding; Monte Carlo ID PENNING TRAP; PHYSICS; SPECTROSCOPY AB Investigators at several laboratories are seriously considering the storage and transport, perhaps over long distances, of very low energy antiprotons as a part of basic physics research programs and perhaps even for practical applications. To do this will require proper attention to the prompt radiation hazards due to the release of energy in the annihilations of antiprotons with nuclei, under either planned or accidental circumstances. In this paper, the potential storage of very low energy antiprotons is discussed, and the major features of the radiation fields produced by their annihilations are reviewed both qualitatively and quantitatively. Detailed Monte Carlo shielding calculations for a conceptual source of annihilating antiprotons nearly at rest are presented. It is concluded that these radiation fields are readily understood and that the radiation hazards can be mitigated using conventional means. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Cossairt, JD (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM cossairt@fnal.gov NR 19 TC 3 Z9 3 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 BP 747 EP 755 DI 10.1097/00004032-200306000-00007 PG 9 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 682XL UT WOS:000183117600007 PM 12822584 ER PT J AU Abelquist, EW AF Abelquist, EW TI Lessons learned during implementation of MARSSIM from an independent verification perspective SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Oak Ridge Associated Univ, Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37831 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S263 EP S263 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000325 ER PT J AU Abelquist, EW Powers, GE AF Abelquist, EW Powers, GE TI Implementation of draft NUREG-1761 radiological surveys for controlling release of solid materials. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Oak Ridge Associated Univ, Oak Ridge, TN 37830 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S234 EP S234 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000248 ER PT J AU Abelquist, EW AF Abelquist, EW TI Scan MDCs for multiple radionuclides in Class 1 areas SO HEALTH PHYSICS LA English DT Article DE operational topic; soil; sampling; radionuclides AB Tire MultiAgency Radiation Survey and Site Investigation Manual (MARSSIM), published in December 1997, has been used for designing final status surveys at a number of D&D sites to date. One or tire more challenging aspects of tire MARSSIM survey design is the strategy employed when multiple radionuclides are present, particularly in Class 1 survey units. The MARSSIM recommends that potential hot spots in a Class 1 survey unit-that could exceed the derived concentration guideline levels for small elevated areas of radioactivity (i.e., DCGL(EMC))-have a reasonably good probability of being detected. Soil sampling on a specified grid size, in conjunction with gamma radiation surface scanning, is used to obtain air adequate assurance level that these hot spots are not missed daring the final status survey. Therefore, it is sometimes necessary to supplement the sample size required by the statistical test to provide additional assurance that potential hot spots of concern are detected. C1 Oak Ridge Inst Sci & Educ, Radiol Safety Assessments & Training, Oak Ridge, TN 37831 USA. RP Abelquist, EW (reprint author), Oak Ridge Inst Sci & Educ, Radiol Safety Assessments & Training, Oak Ridge, TN 37831 USA. EM abelquie@orau.gov NR 4 TC 2 Z9 2 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 1 BP S141 EP S146 DI 10.1097/00004032-200306003-00012 PG 6 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683PK UT WOS:000183157800012 PM 12792407 ER PT J AU Abelquist, EW AF Abelquist, EW TI Applications of MARSSIM SO HEALTH PHYSICS LA English DT Editorial Material C1 Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37831 USA. RP Abelquist, EW (reprint author), Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37831 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 1 BP S97 EP S99 DI 10.1097/00004032-200306003-00001 PG 3 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683PK UT WOS:000183157800001 PM 12792396 ER PT J AU Arndt, A Brey, RR Rodriguez, R Mincher, B AF Arndt, A Brey, RR Rodriguez, R Mincher, B TI Investigation of optimal PCB radiolysis using alkaline 2 isopropanol. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Idaho State Univ, Dept Phys, Pocatello, ID 83209 USA. Idaho State Univ, Dept Chem, Pocatello, ID 83209 USA. Idaho Natl Engn & Environm Lab, Idaho Falls, ID USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S161 EP S161 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000040 ER PT J AU Arnish, JJ Chen, SY Johnson, R LePoire, D Abelquist, E Bauer, E AF Arnish, JJ Chen, SY Johnson, R LePoire, D Abelquist, E Bauer, E TI Extending RESRAD to support MARSSIM through compass: An application of the openlink system SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Argonne Natl Lab, Argonne, IL 60439 USA. Oak Ridge Inst Sci & Educ, Oak Ridge, TN USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S234 EP S234 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000249 ER PT J AU Arnish, JJ LePoire, D Cheng, JJ Kamboj, S Klett, T Yu, T AF Arnish, JJ LePoire, D Cheng, JJ Kamboj, S Klett, T Yu, T TI Current developments in the RESRAD-BUILD computer code. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Argonne Natl Lab, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S194 EP S194 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000132 ER PT J AU Ballinger, MY Barnett, JM Glissmeyer, JA Edwards, DL AF Ballinger, MY Barnett, JM Glissmeyer, JA Edwards, DL TI Evaluation of sampling locations for two radionuclide air-sampling systems based on the requirements of ANSI/HPS N13.1-1999 SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S242 EP S242 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000268 ER PT J AU Ballinger, MY Recknagle, KP Barnett, JM AF Ballinger, MY Recknagle, KP Barnett, JM TI Comparison of a computational fluid dynamics model with exhaust flow data from a scale model stack. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Battelle Seattle Res Ctr, Seattle, WA 98105 USA. Pacific NW Natl Lab, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S242 EP S243 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000269 ER PT J AU Barnett, JM Ballinger, MY Gervais, TL Douglas, DD Edwards, DL AF Barnett, JM Ballinger, MY Gervais, TL Douglas, DD Edwards, DL TI Results of ANSI/HPS N13.1-1999 inspection and cleaning requirements at two facilities. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Pacific NE Natl Lab, Richland, WA 99352 USA. Battelle Seattle Res Ctr, Seattle, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S241 EP S242 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000266 ER PT J AU Bates, BB Buhl, T Hoffman, J AF Bates, BB Buhl, T Hoffman, J TI Los Alamos National Laboratory unique case studies involving monitoring for external dose. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S163 EP S164 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000047 ER PT J AU Bauer, TJ Adams, WC Brown, TL AF Bauer, TJ Adams, WC Brown, TL TI A guided tour of COMPASS SO HEALTH PHYSICS LA English DT Article DE operational topic; surveys; decommissioning; radioactivity, removal of AB The COMPASS software was designed to facilitate the use of MARSSIM and guide the user into making informed decisions in designing final status radiological surveys. COMPASS also simplifies the application of the statistical tests by performing the statistical calculations and providing prospective power curves that help in determining what level of confidence the user is willing to accept for a particular number of measurements or samples for a survey unit. After performing the final status survey, COMPASS assesses the data for comparison to the release criteria. The purpose of this article is to provide the COMPASS user with an overview of the features of the software and to demonstrate how COMPASS implements the MARSSIM guidance. C1 Oak Ridge Inst Sci & Educ, Environm Survey & Site Assessment Program, Oak Ridge, TN 37831 USA. RP Bauer, TJ (reprint author), Oak Ridge Inst Sci & Educ, Environm Survey & Site Assessment Program, MS-19,POB 117, Oak Ridge, TN 37831 USA. EM bauert@oran.gov NR 2 TC 2 Z9 2 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 1 BP S131 EP S135 DI 10.1097/00004032-200306003-00010 PG 5 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683PK UT WOS:000183157800010 PM 12792405 ER PT J AU Bernal, SM Kearfott, KJ Weston, AT Warner, BP Hoffman, JM Morris, JM AF Bernal, SM Kearfott, KJ Weston, AT Warner, BP Hoffman, JM Morris, JM TI The effect of peak shape and size on LiF: Mg,Ti glow curve deconvolution error calculations. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Univ Michigan, Ann Arbor, MI 48104 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RI Kearfott, Kimberlee/G-2467-2014 OI Kearfott, Kimberlee/0000-0002-8698-0913 NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S190 EP S190 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000123 ER PT J AU Breshears, DD Whicker, JJ Johansen, MP Pinder, JE Pinder, JE AF Breshears, DD Whicker, JJ Johansen, MP Pinder, JE Pinder, JE TI Field measurements of wind and water transport for contaminant mobility: Comparisons and contrasts among semiarid grassland, shrubland, and forest ecosystems. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Colorado State Univ, Ft Collins, CO 80523 USA. RI Johansen, Mathew/D-7049-2012; Breshears, David/B-9318-2009 OI Breshears, David/0000-0001-6601-0058 NR 0 TC 1 Z9 1 U1 0 U2 3 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S155 EP S155 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000025 ER PT J AU Buddemeier, BB Cornell, MC AF Buddemeier, BB Cornell, MC TI The department of energys radiological assistance program. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S152 EP S153 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000018 ER PT J AU Campbell, RL Wenzel, WJ Bliss, JL AF Campbell, RL Wenzel, WJ Bliss, JL TI Document management and reader tracking in the Radiation Protection Automation System (RPAS). SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Grp HSR 1, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S181 EP S182 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000097 ER PT J AU Chen, SY AF Chen, SY TI NCRP Report No. 141 on managing potentially radioactive scrap metal. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Argonne Natl Lab, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S187 EP S187 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000114 ER PT J AU Cheng, J Yu, C Williams, WA AF Cheng, J Yu, C Williams, WA TI Comparison of radiation exposures estimated by RESRAD-recycle with real-life measurement data. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Argonne Natl Lab, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S195 EP S195 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000134 ER PT J AU Cossairt, JD Mokhov, NV AF Cossairt, JD Mokhov, NV TI Trapped antiprotons and their radiation hazards SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S231 EP S231 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000238 ER PT J AU Cummings, R AF Cummings, R TI ANSI HPSN13.32 revision-performance testing extremity dosimeters. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S190 EP S191 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000124 ER PT J AU Diediker, LP Dyekman, DL Glissmeyer, JA AF Diediker, LP Dyekman, DL Glissmeyer, JA TI Comparison of an old stack sampling system to a new shrouded probe at Hanford. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Fluor Hanford, Richland, WA 99352 USA. Pacific NW Natl Lab, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S242 EP S242 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000267 ER PT J AU Duran, MA AF Duran, MA TI 14 MEV neutron instrument response. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S232 EP S232 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000242 ER PT J AU Egbert, SD Santoro, RT Barnes, JM Roberts, JA Kaul, DC AF Egbert, SD Santoro, RT Barnes, JM Roberts, JA Kaul, DC TI Survivor radiation shielding calculations for the new dosimetry system, DS02. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Sci Applicat Int Corp, San Diego, CA 92129 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S190 EP S190 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000122 ER PT J AU Fisher, DR AF Fisher, DR TI Current issues in radioisotope supply: Applications research, safeguarding, recycle, and disposition SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S217 EP S217 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000198 ER PT J AU Fix, JJ Kenoyer, JL Merwin, SE Tankersley, WG Taulbee, TD AF Fix, JJ Kenoyer, JL Merwin, SE Tankersley, WG Taulbee, TD TI Development of external dosimetry parameters for site profiles SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA. NIOSH, Cincinnati, OH 45226 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S223 EP S223 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000216 ER PT J AU Fresquez, F Soholt, L Bennett, K Gonzales, GJ AF Fresquez, F Soholt, L Bennett, K Gonzales, GJ TI Radionuclides in fish downstream of Los Alamos National Laboratory after the Cerro Grande fire. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S156 EP S156 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000026 ER PT J AU Gnanapragasam, EK Yu, C AF Gnanapragasam, EK Yu, C TI Comparison of RESRAD-offsite and RESRAD. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Argonne Natl Lab, Shoreline, WA 98133 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S194 EP S194 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000133 ER PT J AU Grimm, JP AF Grimm, JP TI Excess radioactive sealed source disposition through and the US department of energy's offsite source recovery project. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 US DOE, AL, WMD, Albuquerque, NM 87185 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S186 EP S186 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000110 ER PT J AU Guilmette, RA Mishra, NC Allen, SW Saxena, SP AF Guilmette, RA Mishra, NC Allen, SW Saxena, SP TI Human cells respond to changes in background radiation by inducing specific heat shock proteins SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Lovelace Fdn Med Educ & Res, Resp Res Inst, Albuquerque, NM 87108 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S244 EP S245 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000274 ER PT J AU Hackett, JR Kadlubak, KL Travers, J Enroth, T Cleary, J McConn, J AF Hackett, JR Kadlubak, KL Travers, J Enroth, T Cleary, J McConn, J TI An evaluation of radon-influenced alpha measurements collected during NRC license termination surveys at a decommissioned army facility. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Parsons, Denver, CO 80218 USA. Pacific NW Natl Lab, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S185 EP S186 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000109 ER PT J AU Holden, NE Hu, JP Reciniello, RN Rorer, DC AF Holden, NE Hu, JP Reciniello, RN Rorer, DC TI Radiation dosimetry at BNL's medical research reactor. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11953 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S162 EP S162 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000043 ER PT J AU Holden, NE Hu, JP Reciniello, RN Rorer, DC AF Holden, NE Hu, JP Reciniello, RN Rorer, DC TI Radiation dosimetry of a graphite moderated radium-beryllium source. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11727 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S162 EP S162 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000044 ER PT J AU Holden, NE Hu, JP Reciniello, RN Rorer, DC AF Holden, NE Hu, JP Reciniello, RN Rorer, DC TI 2002 review of neutron and nonneutron nuclear data. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11727 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S148 EP S148 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000005 ER PT J AU Jaksch, JA AF Jaksch, JA TI Assessment of the social and economic impacts resulting from construction of the Chernobyl new safe confinement shelter SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 1 U2 3 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S256 EP S256 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000306 ER PT J AU Johansen, MP Breshears, DD Whicker, FW Hakonson, TE AF Johansen, MP Breshears, DD Whicker, FW Hakonson, TE TI Cs-137 concentration and erosion following forest wildfire. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Colorado State Univ, Los Alamos, NM 87544 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RI Johansen, Mathew/D-7049-2012; Breshears, David/B-9318-2009 OI Breshears, David/0000-0001-6601-0058 NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S205 EP S205 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000164 ER PT J AU Johnson, R Durham, L Rieman, C AF Johnson, R Durham, L Rieman, C TI Adapting MARSSIM for FUSRAP site closure SO HEALTH PHYSICS LA English DT Article DE operational topic; contamination; decontamination; radioactivity, removal of AB The Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) provides a coherent, technically defensible process for establishing that exposed surfaces satisfy site cleanup requirements. Unfortunately, many sites have complications that challenge a direct application of MARSSIM. Example complications include Record of Decision (ROD) requirements that are not MARSSIM-friendly, the potential for subsurface contamination, and incomplete characterization information. These types of complications are typically the rule, rather than the exception, for sites undergoing radiologically-driven remediation and closure. One such site is the Formerly Utilized Sites Remedial Action Program (FUSRAP) Linde site in Tonawanda, New York. Cleanup of the site is currently underway. The Linde site presented a number of challenges to designing and implementing a closure strategy consistent with MARSSIM. This paper discusses some of the closure issues confronted by the U.S. Army Corps of Engineers Buffalo District at the Linde site and describes how MARSSIM protocols were adapted to address these issues. C1 Argonne Natl Lab, Environm Assessment Div, Argonne, IL 60439 USA. USA, Corps Engineers, Buffalo Dist, Buffalo, NY 14207 USA. RP Johnson, R (reprint author), Argonne Natl Lab, Environm Assessment Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM rlj@anl.gov NR 3 TC 2 Z9 2 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 1 BP S111 EP S114 DI 10.1097/00004032-200306003-00005 PG 4 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683PK UT WOS:000183157800005 PM 12792400 ER PT J AU Jones, RA AF Jones, RA TI Use of a scanning electron microscope as a workplace investigation tool and a possible basis for higher than expected solubility of a spherical form of uranium. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA 99353 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S197 EP S197 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000140 ER PT J AU Kamboj, S Picel, K Sydelko, T Cleary, J Enroth, T AF Kamboj, S Picel, K Sydelko, T Cleary, J Enroth, T TI Deriving concentration guideline values from deterministic and probabilistic RESRAD analysis at Seneca Army Depot. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Argonne Natl Lab, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S195 EP S195 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000135 ER PT J AU Kamboj, S Cheng, JJ Yu, C AF Kamboj, S Cheng, JJ Yu, C TI Deterministic vs. probabilistic sensitivity analysis to identify sensitive parameters for the dose assessment in the residential scenario using RESRAD. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Argonne Natl Lab, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S185 EP S185 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000108 ER PT J AU Langish, S Rule, KR Gentile, CA Planeta, A AF Langish, S Rule, KR Gentile, CA Planeta, A TI Portable liquid scintillation analysis - Improving HP support of operations SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S263 EP S264 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000326 ER PT J AU Leonard, L Pearson, MW Leonard, S AF Leonard, L Pearson, MW Leonard, S TI Reducing the excess radioactive source inventory in America: What are we getting - What are we leaving? SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S237 EP S237 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000256 ER PT J AU LePoire, D Klett, T Arnish, J Yu, C AF LePoire, D Klett, T Arnish, J Yu, C TI Documentation, technical support, and web resources for the RESRAD family of codes. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Argonne Natl Lab, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S195 EP S196 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000136 ER PT J AU Mao, XS Prinz, AA Khater, HY Seefred, R AF Mao, XS Prinz, AA Khater, HY Seefred, R TI Radiation protection scheme for 48-GEV and 500-KW E-158 experiment SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S232 EP S232 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000243 ER PT J AU Martin, JB Strom, DJ AF Martin, JB Strom, DJ TI How will we deal with the cleanup waste from an RDD? SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S201 EP S201 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000150 ER PT J AU May, RT Welch, KB AF May, RT Welch, KB TI Electron accelerator Be-7 production, associated problems, and proposed remedy. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S231 EP S232 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000241 ER PT J AU Mohagheghi, AH Barber, DS Passell, HD AF Mohagheghi, AH Barber, DS Passell, HD TI Cooperative monitoring for radionuclides in Central Asia transboundary rivers. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S208 EP S208 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000170 ER PT J AU Napier, BA Neitzel, DA Zheleznyak, MJ AF Napier, BA Neitzel, DA Zheleznyak, MJ TI Assessing new safe confinement facility related accident impact on Chernobyl area flora and fauna SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RI Zheleznyak, Mark/D-6800-2013; Zheleznyak, Mark/H-6479-2011 OI Zheleznyak, Mark/0000-0001-7723-6052; Zheleznyak, Mark/0000-0001-7723-6052 NR 0 TC 0 Z9 0 U1 0 U2 4 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S256 EP S256 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000305 ER PT J AU Napier, BA Chaki, S AF Napier, BA Chaki, S TI Comparison of CAP88-PC and GENII-NESHAPS version 2 results for chronic atmospheric releases. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Pacific NE Natl Lab, Richland, WA USA. US EPA, Off Radiat & Indoor Air, Washington, DC USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S244 EP S244 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000273 ER PT J AU Neitzel, DA Schmieman, EA Zheleznyak, MJ Voitsekhovitch, OV AF Neitzel, DA Schmieman, EA Zheleznyak, MJ Voitsekhovitch, OV TI Environmental assessment of the New Safe Confinement for Chernobyl SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RI Zheleznyak, Mark/D-6800-2013; Zheleznyak, Mark/H-6479-2011 OI Zheleznyak, Mark/0000-0001-7723-6052; Zheleznyak, Mark/0000-0001-7723-6052 NR 0 TC 0 Z9 0 U1 0 U2 2 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S254 EP S255 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000302 ER PT J AU O'Connell, P Rabovsky, J Foulke, J AF O'Connell, P Rabovsky, J Foulke, J TI Regulatory considerations for adopting ICRP publication 60 dosimetric methodology recommendations. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 US DOE, Washington, DC 20585 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S238 EP S238 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000258 ER PT J AU Oertel, CP Giles, JR Wells, RP Thompson, KC AF Oertel, CP Giles, JR Wells, RP Thompson, KC TI In-situ depth profiling of Cs-137 contamination in soils at the Idaho National Engineering and Environmental Laboratory. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S158 EP S158 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000033 ER PT J AU Parks, B AF Parks, B TI Radiological control profile for the DOE office of science laboratories. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 US DOE, Off Sci, Germantown, MD 20874 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S179 EP S180 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000093 ER PT J AU Potter, CA AF Potter, CA TI Applications of the ICRP publication 88 clarification on the biokinetic model for tritium. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S196 EP S197 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000138 ER PT J AU Rafales, LS Kuo, N Wallace, PW Wierowski, JV Schuster, DG AF Rafales, LS Kuo, N Wallace, PW Wierowski, JV Schuster, DG TI Managing data quality for the NIOSH claims tracking system. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Adv Technol Labs Int Inc, Cincinnati, OH 45219 USA. NIOSH, Cincinnati, OH 45226 USA. Oak Ridge Associated Univ Inc, Oak Ridge, TN USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S149 EP S149 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000008 ER PT J AU Reciniello, RN Holden, NE Hu, JP Rorer, DC AF Reciniello, RN Holden, NE Hu, JP Rorer, DC TI Radiation dosimetry of the pressure vessel internals of the high flux beam reactor SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S250 EP S250 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000291 ER PT J AU Ritter, PD Whitaker, CA Behymer, WJ Sagendorf, JF AF Ritter, PD Whitaker, CA Behymer, WJ Sagendorf, JF TI Evaluation of response of the INEEL radiological air surveillance network to acute and chronic releases. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Idano Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. Idaho State Univ, Pocatello, ID 83209 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S243 EP S243 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000270 ER PT J AU Rodgers, JC AF Rodgers, JC TI "When smoke gets in your eyes" - Development of a virtual impactor ECAM SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S268 EP S268 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000338 ER PT J AU Rohwer, PS AF Rohwer, PS TI University of Rochester and the health physics opportunity SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S215 EP S215 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000191 ER PT J AU Rokni, SH Liu, JC Kase, KR Roesler, S Taniguchi, S Nakamura, S AF Rokni, SH Liu, JC Kase, KR Roesler, S Taniguchi, S Nakamura, S TI Measurements and calculations of neutron energy and time-of-flight spectra outside the lateral shield of a high-energy electron accelerator beam dump SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. CERN, TIS, RP, CH-1211 Geneva 23, Switzerland. Japan Synchrotron Radiat Res Inst, Sayo, Hyogo, Japan. Tohoku Univ, Sendai, Miyagi 980, Japan. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S231 EP S231 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000240 ER PT J AU Santoro, RT Egbert, SD White, SW Barnes, JM AF Santoro, RT Egbert, SD White, SW Barnes, JM TI Radiation transport calculations for the new dosimetry system, DS02. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Sci Applicat Int Corp, Mclean, VA 22102 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S189 EP S190 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000121 ER PT J AU Schmieman, EA Convert, P Wrona, M Rudko, V Durst, M AF Schmieman, EA Convert, P Wrona, M Rudko, V Durst, M TI Conceptual design of the Chernobyl New Safe Confinement - An overview. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Battelle PNNL, Richland, WA 99352 USA. Elect France, Paris, France. NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S253 EP S253 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000297 ER PT J AU Sengupta, S Klemish, J Hooda, B Holeman, GR Kahnhauser, H AF Sengupta, S Klemish, J Hooda, B Holeman, GR Kahnhauser, H TI Characterization of blip gaseous effluent releases. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Holeman Consultants Inc, Flemington, NJ 08822 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S150 EP S150 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000010 ER PT J AU Shipler, DB Batiy, V Povlovsky, L Schmidt, JP Rudko, V Schmieman, V AF Shipler, DB Batiy, V Povlovsky, L Schmidt, JP Rudko, V Schmieman, V TI Chernobyl New Safe Confinement construction ALARA analysis. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Battelle PNNL, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S254 EP S254 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000300 ER PT J AU Shipler, DB Batiy, V Povlovsky, L Schmidt, JP Schmieman, EA AF Shipler, DB Batiy, V Povlovsky, L Schmidt, JP Schmieman, EA TI Chernobyl deconstruction ALARA analysis. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Battelle PNNL, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S253 EP S253 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000299 ER PT J AU Shipler, DB Rudko, V Batiy, V Timmins, D Schmidt, JP Schmieman, JP AF Shipler, DB Rudko, V Batiy, V Timmins, D Schmidt, JP Schmieman, JP TI Protection from potential exposure for the Chernobyl New Safe Confinement. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Battelle PNNL, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S253 EP S253 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000298 ER PT J AU Sprague, DD AF Sprague, DD TI Safety training of adults: Techniques and pitfalls. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Oakland, CA 94611 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S221 EP S221 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000211 ER PT J AU Stansbury, PS AF Stansbury, PS TI Use of ANSI/HPS N13.12-1999 "surface and volume radioactivity standards for clearance" in decontamination and decommissioning - A 2003 update. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S232 EP S233 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000245 ER PT J AU Straume, T Marchetti, AA Rugel, G McAninch, JE Ruhm, R Faestermann, T Knie, K Korschinek, G Wallner, A Wallner, C Men, P Carroll, KL Martinelli, RE Egbert, S AF Straume, T Marchetti, AA Rugel, G McAninch, JE Ruhm, R Faestermann, T Knie, K Korschinek, G Wallner, A Wallner, C Men, P Carroll, KL Martinelli, RE Egbert, S TI Fast and thermal neutron activation measurements in Hiroshima: Comparisons with DS86 and DS02 calculations. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Univ Utah, Salt Lake City, UT 84112 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. Tech Univ Munich, D-8000 Munich, Germany. Univ Munich, Munich, Germany. Sci Applicat Int Corp, Mclean, VA 22102 USA. RI Wallner, Anton/G-1480-2011 OI Wallner, Anton/0000-0003-2804-3670 NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S189 EP S189 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000120 ER PT J AU Strom, DJ Stansbury, PS AF Strom, DJ Stansbury, PS TI Homeland security blankets - Care packages for the worried well. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Pacific NW Natl Lab, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S201 EP S202 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000151 ER PT J AU Sun, C Reciniello, R Sengupta, R Michel, L AF Sun, C Reciniello, R Sengupta, R Michel, L TI Brookhaven Technical Basis Document for the internal dosimetry program. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S170 EP S170 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000065 ER PT J AU Tompkins, JA AF Tompkins, JA TI Regulatory problems with sealed sources. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S237 EP S238 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000257 ER PT J AU Toohey, RE AF Toohey, RE TI Creation of a dose reconstruction organization SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S210 EP S211 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000178 ER PT J AU Tripodes, JG Swift, KS Rittenberg, RB AF Tripodes, JG Swift, KS Rittenberg, RB TI Decommissioning an institutional radioactive and chemical waste handling facility using a simplified MARSSIM approach. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Calif Irvine, Irvine, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S235 EP S235 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000251 ER PT J AU Wehner, TR May, WL Brown, MJ Williams, MD Streit, GE AF Wehner, TR May, WL Brown, MJ Williams, MD Streit, GE TI Outdoor Biological Aerosol sampling for a biological agent detection system SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S269 EP S270 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000343 ER PT J AU Wenzel, WJ Campbel, RL Mansfield, BB AF Wenzel, WJ Campbel, RL Mansfield, BB TI Automation of radiation instrument tracking and management. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Grp HSR 1, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S181 EP S181 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000096 ER PT J AU Whicker, JJ Pinder, JE Breshears, DD Mack, KN AF Whicker, JJ Pinder, JE Breshears, DD Mack, KN TI Increased contaminant transport through wind erosion following wildfire. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Colorado State Univ, Ft Collins, CO 80523 USA. RI Breshears, David/B-9318-2009 OI Breshears, David/0000-0001-6601-0058 NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S206 EP S206 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000165 ER PT J AU Wierowski, JV Wallace, PW Wierowski, MD AF Wierowski, JV Wallace, PW Wierowski, MD TI Construction of a secure online environment for dose reconstructions SO HEALTH PHYSICS LA English DT Meeting Abstract C1 MJW Corp Inc, Williamsville, NY 14221 USA. Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S224 EP S224 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000218 ER PT J AU Wishau, RJ Kaiz, DL Wannigman, DL Teague, JG Brown, DV Eason, DV AF Wishau, RJ Kaiz, DL Wannigman, DL Teague, JG Brown, DV Eason, DV TI Design and testing of an innovative neutron/photon shield. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S182 EP S182 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000100 ER PT J AU Yu, C Wallo, A Williams, WA Peterson, H AF Yu, C Wallo, A Williams, WA Peterson, H TI Update on RESRAD - New features and new members of the family SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Argonne Natl Lab, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S193 EP S193 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000130 ER PT J AU Yu, C LePoire, D Kamboj, S Klett, T Arnish, J Cheng, JJ Hlohowskij, I Domotor, S Higley, K Graham, R Newkirk, P Boyd, M Harris, T AF Yu, C LePoire, D Kamboj, S Klett, T Arnish, J Cheng, JJ Hlohowskij, I Domotor, S Higley, K Graham, R Newkirk, P Boyd, M Harris, T TI RESRAD-BIOTA: A new code for evaluating environmental radiation doses tooecological receptors. SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Argonne Natl Lab, Argonne, IL 60439 USA. Oregon State Univ, Corvallis, OR 97331 USA. US EPA, Washington, DC 20460 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S193 EP S194 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000131 ER PT J AU Zhou, Y Cheng, YS Gao, J Barringer, D Wanningman, DL Voss, DL AF Zhou, Y Cheng, YS Gao, J Barringer, D Wanningman, DL Voss, DL TI Evaluation of two continuous air monitors SO HEALTH PHYSICS LA English DT Meeting Abstract C1 Lovelace Resp Res Inst, Albuquerque, NM 87108 USA. Los Alamos Natl Lab, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUN PY 2003 VL 84 IS 6 SU 2 BP S268 EP S268 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 683QE UT WOS:000183160000339 ER PT J AU Layden-Almer, JE Ribeiro, RM Wiley, T Perelson, AS Layden, TJ AF Layden-Almer, JE Ribeiro, RM Wiley, T Perelson, AS Layden, TJ TI Viral dynamics and response differences in HCV-infected African American and white patients treated with IFN and ribavirin SO HEPATOLOGY LA English DT Article ID CHRONIC HEPATITIS-C; SUSTAINED VIROLOGICAL RESPONSE; NONSTRUCTURAL 5A PROTEIN; INTERFERON-ALPHA; RACIAL-DIFFERENCES; UNITED-STATES; IN-VIVO; VIRUS; THERAPY; KINASE AB Studies have suggested that African American patients infected with hepatitis C virus (HCV) do not respond as well to treatment with interferon (IFN) as white patients. Here we analyzed the difference in the viral kinetic response between genotype 1 HCV-infected African American patients (n = 19) and white patients (n = 16). Patients were treated with 10 mIU IFN-alpha2b daily with or without ribavirin for 1 month followed by 3 mIU IFN-a2b 3 times a week with ribavirin. The kinetic parameters (epsilon, treatment effectiveness at inhibiting virion production; delta, loss rate of virus-producing cells; c, clearance rate of free virions; tau, delay until viral decline starts) were estimated from the viral load decay profiles using a previously described mathematical model. Differences in early kinetic parameters and viral negativity frequencies at weeks 4, 12, and 48 were compared. Ribavirin did not appear to enhance any of the viral kinetic parameters, although this may have been due to the high dose of IFN used. African American patients exhibited significantly (P =.005). lower drug effectiveness (88.6% vs. 98.2%) compared with white patients, accounting for a 0.8 log lower HCV RNA decrease in the first 24 hours of treatment. Significant differences (P =.006) were also noted for delta. There was no correlation between any of the viral kinetic parameters and either age, body mass index (BMI), or genotype 1 subtype. No patient achieved viral negativity at weeks 4, 12, or 48 without an epsilon greater than 90%. The mean viral decline and viral negativity rates were statistically different between the two races; however, when controlling for treatment effectiveness, these differences were no longer apparent. In conclusion, the failure of IFN response in African American patients infected with genotype 1 HCV is in part due to an impaired ability to inhibit viral production. C1 Univ Illinois, Dept Med, Chicago, IL 60612 USA. Los Alamos Natl Lab, Los Alamos, NM USA. RP Layden, TJ (reprint author), Univ Illinois, Dept Med, 840 S Wood,M-C 787, Chicago, IL 60612 USA. FU NCRR NIH HHS [M01 RR 13987, R01 RR06555]; NIDDK NIH HHS [R01 DK58320-01] NR 26 TC 142 Z9 145 U1 0 U2 1 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 USA SN 0270-9139 J9 HEPATOLOGY JI Hepatology PD JUN PY 2003 VL 37 IS 6 BP 1343 EP 1350 DI 10.1053/jhep.2003.50217 PG 8 WC Gastroenterology & Hepatology SC Gastroenterology & Hepatology GA 684ZQ UT WOS:000183236700017 PM 12774013 ER PT J AU Nagle, RD Plummer, MV Congdon, JD Fischer, RU AF Nagle, RD Plummer, MV Congdon, JD Fischer, RU TI Parental investment, embryo growth, and hatchling lipid reserves in softshell turtles (Apalone mutica) from Arkansas SO HERPETOLOGICA LA English DT Article DE Apalone mutica; egg lipids; embryo growth; hatchling; parental investment ID EGG COMPONENTS; BODY-SIZE; CHELYDRA-SERPENTINA; YOLK; ENERGY; HYPOTHESIS; LIZARD AB The smooth softshell Apalone mutica is a North American trionychid turtle typically found in moderate to fast moving rivers and streams. Such habitats contrast with more resource rich environments (e.g., marshes and swamps) inhabited by other turtle species for which parental investment and egg and hatchling components have been studied. We measured components of eggs, embryos, and hatchlings and determined levels of pre-ovulatory parental investment in Apalone mutica from Arkansas. Eggs averaged 7.34 g wet mass and 28.8% non-polar lipids (NPL) by dry mass. Triacylglycerol, an energy storage lipid, was the major lipid class component of eggs, averaging 82% of total egg lipids. Levels of structural (mostly polar) lipid classes were generally similar to those found in eggs of other turtle species, although proportions of phophatidylethanolamine were higher and increased with egg size. Incubation time averaged 55+/-SE 3.4 d. At 18 and 36 d of development, embryo dry mass represented 11% and 34%, respectively, of embryo dry mass at hatching. Thus, approximately two-thirds of the total increase in embryo dry mass occurred during the final one-third (18 d) of development. Hatchlings averaged 6.60 g wet mass and 25.9% NPL by dry mass. The index of parental investment in care (hatchling NPL/egg NPL) averaged 75.4%, the highest such index reported among turtles. High levels of pre-ovulatory, parental investment in trophic care of neonates appear to be a factor important to hatchling survival during early life stages such as dispersal from the nest, movement to aquatic habitats, and the period prior to which hatchlings attain a positive energy balance in relatively low resource environments. C1 Juniata Coll, Huntingdon, PA 16652 USA. Harding Univ, Dept Biol, Searcy, AR 72149 USA. Savannah River Ecol Lab, Aiken, SC 29802 USA. Eastern Illinois Univ, Dept Biol, Charleston, IL 61920 USA. RP Nagle, RD (reprint author), Juniata Coll, Huntingdon, PA 16652 USA. NR 48 TC 16 Z9 16 U1 1 U2 7 PU HERPETOLOGISTS LEAGUE PI EMPORIA PA EMPORIA STATE UNIV, DIVISION BIOLOGICAL SCIENCES, 1200 COMMERCIAL ST, EMPORIA, KS 66801-5087 USA SN 0018-0831 J9 HERPETOLOGICA JI Herpetologica PD JUN PY 2003 VL 59 IS 2 BP 145 EP 154 DI 10.1655/0018-0831(2003)059[0145:PIEGAH]2.0.CO;2 PG 10 WC Zoology SC Zoology GA 682XU UT WOS:000183118300001 ER PT J AU Pollycove, M Feinendegen, LE AF Pollycove, M Feinendegen, LE TI Radiation-induced versus endogenous DNA damage: possible effect of inducible protective responses in mitigating endogenous damage SO HUMAN & EXPERIMENTAL TOXICOLOGY LA English DT Review ID DOUBLE-STRAND BREAKS; DOSE IONIZING-RADIATION; ADAPTIVE RESPONSE; HUMAN-CELLS; ALPHA-PARTICLES; BASE DAMAGE; NEOPLASTIC TRANSFORMATION; BIOLOGICAL INACTIVATION; CELLULAR MECHANISMS; HYDROGEN-PEROXIDE AB Ionizing radiation (IR) causes damage to DNA that is apparently proportional to absorbed dose. The incidence of radiation-induced cancer in humans unequivocally rises with the value of absorbed doses above about 300 mGy, in a seemingly linear fashion. Extrapolation of this linear correlation down to zero-dose constitutes the linear-no-threshold (LNT) hypothesis of radiation-induced cancer incidence. The corresponding dose-risk correlation, however, is questionable at doses lower than 300 mGy. Non-radiation induced DNA damage and, in consequence, oncogenic transformation in non-irradiated cells arises from a variety of sources, mainly from weak endogenous carcinogens such as reactive oxygen species (ROS) as well as from micronutrient deficiencies and environmental toxins. In order to relate the low probability of radiation-induced cancer to the relatively high incidence of non-radiation carcinogenesis, especially at low-dose irradiation, the quantitative and qualitative differences between the DNA damages from non-radiation and radiation sources need to be addressed and put into context of physiological mechanisms of cellular protection. This paper summarizes a co-operative approach by the authors to answer the questions on the quantitative and qualitative DNA damages from non-radiation sources, largely endogenous ROS, and following exposure to low doses of IR. The analysis relies on published data and justified assumptions and considers the physiological capacity of mammalian cells to protect themselves constantly by preventing and repairing DNA damage. Furthermore, damaged cells are susceptible to removal by apoptosis or the immune system. The results suggest that the various forms of non-radiation DNA damage in tissues far outweigh corresponding DNA damage from low-dose radiation exposure at the level of, and well above, background radiation. These data are examined within the context of low-dose radiation induction of cellular signaling that may stimulate cellular protection systems over hours to weeks against accumulation of DNA damage. The particular focus is the hypothesis that these enhanced and persisting protective responses reduce the steady state level of non-radiation DNA damage, thereby reducing deleterious outcomes such as cancer and aging. The emerging model urgently needs rigorous experimental testing, since it suggests, importantly, that the LNT hypothesis is invalid for complex adaptive systems such as mammalian organisms. C1 Univ Calif San Francisco, Sch Med, San Francisco, CA 94143 USA. Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. RP Pollycove, M (reprint author), Univ Calif San Francisco, Sch Med, San Francisco, CA 94143 USA. NR 112 TC 62 Z9 82 U1 1 U2 7 PU ARNOLD, HODDER HEADLINE PLC PI LONDON PA 338 EUSTON ROAD, LONDON NW1 3BH, ENGLAND SN 0960-3271 J9 HUM EXP TOXICOL JI Hum. Exp. Toxicol. PD JUN PY 2003 VL 22 IS 6 BP 290 EP 306 DI 10.1191/0960327103ht365oa PG 17 WC Toxicology SC Toxicology GA 696NK UT WOS:000183892800002 PM 12856953 ER PT J AU Barcellos-Hoff, MH AF Barcellos-Hoff, MH TI Radiation-induced versus endogenous DNA damage: commentary on Pollycove and Feinendegen SO HUMAN & EXPERIMENTAL TOXICOLOGY LA English DT Editorial Material C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Barcellos-Hoff, MH (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU ARNOLD, HODDER HEADLINE PLC PI LONDON PA 338 EUSTON ROAD, LONDON NW1 3BH, ENGLAND SN 0960-3271 J9 HUM EXP TOXICOL JI Hum. Exp. Toxicol. PD JUN PY 2003 VL 22 IS 6 BP 307 EP 307 DI 10.1191/0960327103ht366oa PG 1 WC Toxicology SC Toxicology GA 696NK UT WOS:000183892800003 ER PT J AU Thomassen, DG Metting, NF AF Thomassen, DG Metting, NF TI Radiation-induced versus endogenous DNA damage: commentary on Pollycove and Feinendegen SO HUMAN & EXPERIMENTAL TOXICOLOGY LA English DT Editorial Material DE endogenous DNA damage; ionizing radiation; LNT hypothesis; low dose exposure; radiobiology AB The premises underlying the article by Pollycove and Feinendegen are unlikely to generate disagreement among most scientists. The authors do a good job of reviewing the scientific literature on the importnat topic of radiation-induced versus endogenous DNA damage, and they use the available data to calculate numerical estimates and comparisons of DNA damages induced by radiation versus metabolic processes. However, these numbers should in no way be confused with proof or disproof of the involvement of specific biological mechanisms. Many important questions for low-dose radiobiology remain unanswered, and there is no substitute for experimental demonstration. C1 US DOE, Off Biol & Environm Res, Off Sci, Washington, DC 20585 USA. RP Thomassen, DG (reprint author), US DOE, Off Biol & Environm Res, Off Sci, SC-72 Germantown Bldg,1000 Independence Ave SW, Washington, DC 20585 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ARNOLD, HODDER HEADLINE PLC PI LONDON PA 338 EUSTON ROAD, LONDON NW1 3BH, ENGLAND SN 0960-3271 J9 HUM EXP TOXICOL JI Hum. Exp. Toxicol. PD JUN PY 2003 VL 22 IS 6 BP 319 EP 320 DI 10.1191/0960327103ht369oa PG 2 WC Toxicology SC Toxicology GA 696NK UT WOS:000183892800006 ER PT J AU Pollycove, M Feinendegen, LE AF Pollycove, M Feinendegen, LE TI Commentary and response to reviewer critiques regarding 'radiation-induced versus endogenous DNA damage: possible effects of inducible protective responses in mitigating endogenous damage' SO HUMAN & EXPERIMENTAL TOXICOLOGY LA English DT Editorial Material ID CARCINOGENESIS; CELLS C1 Univ Calif San Francisco, Sch Med, San Francisco, CA 94143 USA. Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. RP Pollycove, M (reprint author), Univ Calif San Francisco, Sch Med, San Francisco, CA 94143 USA. NR 6 TC 0 Z9 0 U1 0 U2 2 PU ARNOLD, HODDER HEADLINE PLC PI LONDON PA 338 EUSTON ROAD, LONDON NW1 3BH, ENGLAND SN 0960-3271 J9 HUM EXP TOXICOL JI Hum. Exp. Toxicol. PD JUN PY 2003 VL 22 IS 6 BP 321 EP 323 DI 10.1191/0960327103ht370oa PG 3 WC Toxicology SC Toxicology GA 696NK UT WOS:000183892800007 ER PT J AU Moursund, RA Carlson, TJ Peters, RD AF Moursund, RA Carlson, TJ Peters, RD TI A fisheries application of a dual-frequency identification sonar acoustic camera SO ICES JOURNAL OF MARINE SCIENCE LA English DT Article; Proceedings Paper CT ICES Symposium on Acoustics in Fisheries and Aquatic Ecology CY JUN 10-14, 2002 CL MONTPELLIER, FRANCE SP ICES, Inst Rech Dev, IFREMER, Acoust Soc Amer, UK Inst Acoust, US Natl Marine Fisheries Serv, Soc Francaise Acoust DE acoustic camera; DIDSON; hydropower limits; multibeam sonar AB The uses of an acoustic camera in fish-passage research at hydropower facilities are being explored by the U.S. Army Corps of Engineers. The "Dual-Frequency Identification Sonar" (DIDSON) is a high-definition imaging sonar that obtains near-video quality images for the identification of objects underwater. Developed originally for the U.S. Navy by the University of Washington's Applied Physics Laboratory, it bridges the gap between existing fisheries-assessment sonar and optical systems. The images within 12 m of this acoustic camera are sufficiently clear such that fish can be observed undulating as they swim and their orientation ascertained in otherwise zero-visibility water. In the 1.8 MHz high-frequency mode, this system comprises 96 beams over a 29degrees field-of-view. The high resolution and fast frame rate provide target visualization in real time. The DIDSON can be used where conventional underwater cameras would be limited by low light levels and high turbidity. (C) 2003 International Council for the Exploration of the Sea. Published by Elsevier Science Ltd. All rights reserved. C1 Pacifi NW Natl Lab, Richland, WA 99352 USA. Battelle Portland Off, Portland, OR 97204 USA. USA, Corps Engineers, Portland, OR 97208 USA. RP Moursund, RA (reprint author), Pacifi NW Natl Lab, POB 999,MSIN K6-85, Richland, WA 99352 USA. NR 5 TC 55 Z9 58 U1 3 U2 16 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 1054-3139 J9 ICES J MAR SCI JI ICES J. Mar. Sci. PD JUN PY 2003 VL 60 IS 3 BP 678 EP 683 DI 10.1016/S1054-3139(03)00036-5 PG 6 WC Fisheries; Marine & Freshwater Biology; Oceanography SC Fisheries; Marine & Freshwater Biology; Oceanography GA 694GT UT WOS:000183766600034 ER PT J AU Burleigh, S Hooke, A Torgerson, L Fall, K Cerf, V Durst, B Scott, K Weiss, H AF Burleigh, S Hooke, A Torgerson, L Fall, K Cerf, V Durst, B Scott, K Weiss, H TI Delay-tolerant networking: An approach to interplanetary Internet SO IEEE COMMUNICATIONS MAGAZINE LA English DT Article C1 CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. Intel Corp, Berkeley Res Ctr, Santa Clara, CA 95051 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Network Res Grp, Berkeley, CA 94720 USA. Mitre Corp, Informat Syst & Technol Div, Networking & Commun Engn Dept, Bedford, MA 01730 USA. Mitre Corp, Ctr Innovat Comp & Informat, Bedford, MA 01730 USA. Sparta Syst Inc, Laguna Hills, CA 92653 USA. RP Burleigh, S (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA. NR 6 TC 372 Z9 410 U1 3 U2 17 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA SN 0163-6804 J9 IEEE COMMUN MAG JI IEEE Commun. Mag. PD JUN PY 2003 VL 41 IS 6 BP 128 EP 136 DI 10.1109/MCOM.2003.1204759 PG 9 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA 684PY UT WOS:000183216800019 ER PT J AU Bass, M Weichman, LS Vigil, S Brickeen, BK AF Bass, M Weichman, LS Vigil, S Brickeen, BK TI The temperature dependence of Nd3+ doped solid-state lasers SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article DE laser cross section; Q-switching; stimulated-emission cross section; temperature dependence ID Q-SWITCHED LASERS AB The temperature-dependent performance for long-pulse and Q-switched Nd3+ doped solid-state lasers are analyzed. Over a wide temperature range, it is shown that the output energy for. the long-pulse laser decreases with increasing temperature as does that of the actively Q-switched laser when pumped to the same level of inversion at all temperatures. Conversely, when such lasers are pumped to the amplified spontaneous emission limit at each temperature or when the laser is passively Q-switched, the output energy increases with temperature. These temperature dependencies are analytically predicted and are compared to experimental results collected on various Nd:YAG and Cr:Nd:GSGG laser systems. The laser performance data and the model developed are shown to be in close agreement when using values for the stimulated-emission cross section and its temperature derivative obtained in separate spectroscopic measurements. C1 Univ Cent Florida, CREOL, Sch Opt, Orlando, FL 32816 USA. Sandia Natl Labs, Albuquerque, NM 87123 USA. Honeywell FM&T, Kansas City, MO 64141 USA. RP Bass, M (reprint author), Univ Cent Florida, CREOL, Sch Opt, Orlando, FL 32816 USA. NR 8 TC 19 Z9 22 U1 0 U2 7 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 USA SN 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD JUN PY 2003 VL 39 IS 6 BP 741 EP 748 DI 10.1109/JQE.2003.810773 PG 8 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA 684ND UT WOS:000183212700007 ER PT J AU Strassner, B Chang, K AF Strassner, B Chang, K TI Highly efficient C-band circularly polarized rectifying antenna array for wireless microwave power transmission SO IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION LA English DT Article DE circularly polarized (CP) antennas; coplanar stripline (CPS) filter; microwave power transmission; rectifying antenna (rectenna); wireless power transmission ID RECTENNA AB This paper reports a new circularly polarized (CP) high-gain, high-efficiency rectifying antenna (rectenna) array designed in a coplanar stripline(CPS) circuit. The array can maintain a constant dc output voltage regardless of its broadside orientation. The array is etched on Rogers Duroid 5870 substrate with epsilon(r) = 2.33 and 10 mil thickness. High-gain dual rhombic loop antennas and a reflecting plane are used in order to reduce the total number of rectenna elements necessary to cover a fixed area. Each antenna has a CP antenna gain of 11 dB and a better than 1 dB axial ratio fractional bandwidth of 4.7%. The single element, rectenna achieves 81% RF-to-dc coversion efficiency at 5.71 GHz and uses a CPS band-reject filter (BRF) to suppress the reradiated harmonics by more than 19 dB. At 5.61 GHz, using an array loading of 150 Ohm, a 3 x 3 recterma array produces 0.86 W of dc output power with an RF-to-dc conversion efficiency of 78% and an axial ratio of 0.25 dB for an incident CP power density of 7.6 mW/cm(2). C1 Texas A&M Univ, Dept Elect Engn, College Stn, TX 77843 USA. RP Strassner, B (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 15 TC 26 Z9 28 U1 1 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-926X J9 IEEE T ANTENN PROPAG JI IEEE Trans. Antennas Propag. PD JUN PY 2003 VL 51 IS 6 BP 1347 EP 1356 DI 10.1109/TAP.2003.812252 PG 10 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA 697NK UT WOS:000183949400026 ER PT J AU Clark, DD Espy, MA Kraus, RH Matlachov, A Lamb, JS AF Clark, DD Espy, MA Kraus, RH Matlachov, A Lamb, JS TI Weld quality evaluation using a high-temperature SQUID array SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE HTS-SQUID; nondestructive evaluation; weld quality AB This paper presents preliminary data for evaluating weld quality using high-temperature SQUIDs. The SQUIDs are integrated into an instrument known as the SQUID Array Microscope, or SAMi. The array consists of 11 SQUIDs evenly distributed over an 7.5 min baseline. Welds are detected using SAMi by using an on board coil to induce eddy currents in a conducting sample and measuring the resulting magnetic fields. The concept is that the induced magnetic fields will differ in parts of varying Weld quality. The data presented here was collected from three stainless steel parts using SAMi. Each part was either solid, included a good weld, or included a bad weld. The induced magnetic field's magnitude and phase relative to the induction signal were measured. For each sample considered, both the magnitude and phase data were measurably different than the other two samples. These results indicate that it is possible to use SAMi to evaluate weld quality. C1 Los Alamos Natl Lab Biophys Grp, Los Alamos, NM 87545 USA. RP Clark, DD (reprint author), Los Alamos Natl Lab Biophys Grp, Los Alamos, NM 87545 USA. NR 5 TC 1 Z9 1 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 235 EP 238 DI 10.1109/TASC.2003.813693 PN 1 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UB UT WOS:000184241700040 ER PT J AU Jhon, HS Jeon, CH Han, KB Myoung, SS Yook, JG Jia, QX Lee, SY AF Jhon, HS Jeon, CH Han, KB Myoung, SS Yook, JG Jia, QX Lee, SY TI Realization of HTS trisection band pass filter SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE bandpass filter; microstrip; PLD; superconductor; trisection; YBa2Cu3O7-x ID YBCO THIN-FILMS AB We report characteristics of a high-temperature superconductor (HTS) bandpass filter with the designed center frequency of 11.8 GHz. An epitaxial YBa2Cu3O7-x (YBCO) superconducting thin films were grown on a MgO substrate using the pulsed laser deposition(PLD) technique. Use of HTS films for microwave applications provides a realization of high performance planar filters with narrow passband and low insertion loss. We have designed and fabricated trisection bandpass filters with the center frequency of 11.8 GHz. In order to reduce the filter size, the filter was designed to have modified hairpin-type coupled lines. The film thicknesses were about 500 run. Superconducting transition temperatures have shown to be about 89 K. The fractional bandwidth of the HTS filter was about 1.1% and the band rejection ratio was about 296 dB/GHz. Also the performance of superconducting bandpass filter is compared with a copper filter. C1 Yonsei Univ, Dept Elect & Elect Engn, Seoul 120749, South Korea. Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA. RP Jhon, HS (reprint author), Yonsei Univ, Dept Elect & Elect Engn, Seoul 120749, South Korea. RI Jia, Q. X./C-5194-2008 NR 5 TC 0 Z9 0 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 294 EP 296 DI 10.1109/TASC.2003.813713 PN 1 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UB UT WOS:000184241700055 ER PT J AU Lanting, TM Cho, HM Clarke, J Dobbs, M Lee, AT Richards, PL Smith, AD Spieler, HG AF Lanting, TM Cho, HM Clarke, J Dobbs, M Lee, AT Richards, PL Smith, AD Spieler, HG TI A frequency-domain SQUID multiplexer for arrays of transition-edge superconducting sensors SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE bolometer; multiplexer; SQUID; transition-edge ID STRONG ELECTROTHERMAL FEEDBACK; BOLOMETER AB We describe the development of a frequency-domain multiplexer (MUX) to read out arrays of superconducting transition-edge sensors (TES). Fabrication of large-format Arrays of these sensors is becoming practical; however, reading out each sensor in the array is a major instrumental challenge.. Frequency-domain multiplexing can greatly simplify the instrumentation of large arrays by reducing the number of SQUID's (superconducting quantum interference devices) and wires to the low temperature stages. Each sensor is biased at a different frequency, ranging from 380 kHz to 1 MHz. Each sensor signal amplitude-modulates its respective AC bias frequency. An LC filter associated with each sensor suppresses Johnson noise from the other sensors. The signals are combined at a current summing node and measured by a single SQUID. The individual signals from each sensor are then lock-in detected by room temperature electronics. Test chips with fully lithographed LC filters for up to 32 channels have been designed and fabricated. The capacitance and inductance values have been measured and are close to the design goals. We discuss the basic principles of frequency-domain multiplexing, the design and testing of the test chips, and the implementation of a practical system. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. TRW Co Inc, Redondo Beach, CA 90278 USA. RP Lanting, TM (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. NR 9 TC 9 Z9 9 U1 2 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 626 EP 629 DI 10.1109/TASC.2003.813973 PN 1 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UB UT WOS:000184241700136 ER PT J AU Miyazaki, T Ullom, JN Cunningham, MF Labov, SE AF Miyazaki, T Ullom, JN Cunningham, MF Labov, SE TI Noise analysis of gamma-ray TES microcalorimeters with a demonstrated energy resolution of 52 eV at 60 keV SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang ID TRANSITION-EDGE SENSORS; BOLOMETERS AB We present recent results from our gamma-ray transition-edge sensor (TES) microcalorimeters. We have demonstrated an energy resolution of 52 eV at 60 keV with devices composed of a high-purity Sn absorber and a Mo/Cu multilayer thin-film TES. In this paper, we present a detailed noise analysis of these devices and show that the major noise sources are device originated (thermal fluctuation and Johnson noise). Our performance analysis explicitly includes the noise contribution due to the composite geometry of these devices and electro-thermal feedback (ETF). C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Miyazaki, T (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RI Miyazaki, Toshiyuki/L-6587-2015 OI Miyazaki, Toshiyuki/0000-0002-1727-7562 NR 7 TC 7 Z9 7 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 630 EP 633 DI 10.1109/TASC.2003.813975 PN 1 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UB UT WOS:000184241700137 ER PT J AU Ullom, JN Cunningham, MR Miyazaki, T Labov, SE Clarke, J Lanting, TM Lee, AT Richards, PL Yoon, J Spieler, H AF Ullom, JN Cunningham, MR Miyazaki, T Labov, SE Clarke, J Lanting, TM Lee, AT Richards, PL Yoon, J Spieler, H TI A frequency-domain read-out technique for large microcalorimeter arrays demonstrated using high-resolution gamma-ray sensors SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE microcalorimeter; multiplexing; SQUID's; transition-edge sensor ID TRANSITION-EDGE SENSORS; SQUID MULTIPLEXER; BOLOMETERS AB Cryogenic sensors composed of transition-biased superconducting films have demonstrated remarkable sensitivity at gamma-ray, x-ray, optical, and far-infrared to millimeter wavelengths. However, for these sensors to find widespread application in astronomy and materials analysis, technologies for building and reading out large arrays are required. We are currently developing a frequency-domain multiplexing scheme for the read-out of large numbers of microcalorimeters using a much smaller number of amplifiers. In this scheme, each sensor is biased at an identifying frequency and operated in a series LC circuit to suppress out-of-band noise. Here, we present results demonstrating the undegraded operation of two gamma-ray sensors multiplexed using this technique. In addition, we provide a series of design rules which relate the minimum bias frequency and the values of the reactive elements in the system to a small number of sensor properties. Finally, we discuss the ultimate limits on the number of sensors that can be measured with a single amplifier. C1 Natl Inst Stand & Technol, Boulder, CO 80305 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Virginia, Dept Phys, Charlottesville, VA 22903 USA. Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA. RP Ullom, JN (reprint author), Natl Inst Stand & Technol, 325 Broadway, Boulder, CO 80305 USA. RI Miyazaki, Toshiyuki/L-6587-2015 OI Miyazaki, Toshiyuki/0000-0002-1727-7562 NR 19 TC 10 Z9 10 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 643 EP 648 DI 10.1109/TASC.2003.813981 PN 1 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UB UT WOS:000184241700140 ER PT J AU Espy, MA Matlachov, AN Kraus, RH Betts, JB AF Espy, MA Matlachov, AN Kraus, RH Betts, JB TI SQUID noise as a function of temperature: A survey of three SQUID's SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TX SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperConductiv Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Superconductiv, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Superconductiv & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE electric dipole moment; low temperature; picovoltmeter; SQUID noise ID ELECTRIC-DIPOLE MOMENT; DC SQUID; OPTIMIZATION AB The temperature dependence of SQUID noise was tested over a temperature range from 0.3-4 K for SQUID's of three different manufactures, two designed for user supplied pick-up coils and one a magnetometer. A SQUID-based picovoltmeter, designed to reduce noise contributions for cables and electronics was used to read out the signal from the SQUID being investigated. The data were, taken in support of a physics experiment which will use SQUID's to measure the precession frequency of spin polarized He-3, acting as a comagnetometer with spin polarized ultra cold neutrons (UCN). The final aim of the experiment is to measure the neutron electric dipole moment to 4 x 10(-28) ecm. The He-3 and UCN will be in a bath at temperatures < 0.5 K. The noise performance of the SQUID's at these temperatures must be well understood before the experiment. The results of the noise studies as a function of temperature are presented for the three SQUID's and their behavior is compared to theoretical predictions based on SQUID parameters. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM espy@lanl.gov; matlach@lanl.gov; rkraus@lanl.gov; jbbetts@lanl.gov NR 16 TC 1 Z9 1 U1 2 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 731 EP 734 DI 10.1109/TASC.2003.814019 PN 1 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UB UT WOS:000184241700162 ER PT J AU Bruno, AC Espy, MA Clark, DD Matlashov, AN Kraus, RH AF Bruno, AC Espy, MA Clark, DD Matlashov, AN Kraus, RH TI Digital spatial filter made from a SQUID array SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE measurements; signal processing; SQUIDs AB A linear array of high transition temperature SQUID, has been configured to work as digital spatial filters. The SQUID filters can be configured to obtain a desired spatial frequency response. We describe their design using a technique known as Frequency Sampling, which consists of specifying a discrete spatial frequency response for the SQUID array spatial filter. We then apply that sequence to the inverse Discrete Fourier Transform to get the spatial domain gain of each SQUID and the baseline. Several designs for spatial band-pass filters are proposed and checked experimentally. The results show that while keeping or even increasing the noise rejection obtained with conventional gradiometers, the SQUID filters preserve the original signal characteristics of the source. C1 Pontificia Univ Catolica Rio de Janeiro, Dept Phys, BR-22453900 Rio De Janeiro, Brazil. Los Alamos Natl Lab, Biophys Grp, Los Alamos, NM 87545 USA. RP Bruno, AC (reprint author), Pontificia Univ Catolica Rio de Janeiro, Dept Phys, BR-22453900 Rio De Janeiro, Brazil. NR 2 TC 3 Z9 3 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 779 EP 782 DI 10.1109/TASC.2003.814041 PN 1 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UB UT WOS:000184241700174 ER PT J AU Ozyuzer, L Zasadzinski, JE Gray, KE Hinks, DG Miyakawa, N AF Ozyuzer, L Zasadzinski, JE Gray, KE Hinks, DG Miyakawa, N TI Probing the phase diagram of Bi2Sr2CaCu2O8+delta with tunneling spectroscopy SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE high temperature superconductors; Josephson junctions ID T-C SUPERCONDUCTORS; OVERDOPED BI2SR2CACU2O8+DELTA; MAGNETIC-SUSCEPTIBILITY; NORMAL-STATE; GAP; SPECTRA; TEMPERATURE; EXCITATION; PSEUDOGAP; PARTICLE AB Tunneling measurements are performed on Ca-rich single crystals of Bi2Sr2CaCu2O8+delta (Bi2212), with various oxygen doping levels, using a novel point contact method. At 4.2 K, SIN and SIS tunnel junctions are obtained with well-defined quasiparticle peaks, robust dip and hump features and in some cases Josephson currents. The doping dependence of tunneling conductances of Ca-rich Bi2212 are analyzed and compared to stoichiometric Bi2212. A similar profile of energy gap vs. doping concentration is found although the Ca-rich samples have a slighly smaller optimum T, and therefore smaller gap values for any doping level. The evolution of tunneling conductance peak height to background ratios with hole concentration are compared. For a given doping level, the Ca-rich spectra showed more broadened features compared to the stoichiometric counterparts, most likely due to increased disorder from the excess Ca. Comparison of the dip and hump features has provided some potential insights into their origins. C1 Izmir Inst Technol, Dept Phys, TR-35437 Izmir, Turkey. IIT, Dept Phys, Chicago, IL 60616 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Sci Univ Tokyo, Suwa, Japan. RP Ozyuzer, L (reprint author), Izmir Inst Technol, Dept Phys, Gulbahce Campus,Urla, TR-35437 Izmir, Turkey. RI Ozyuzer, Lutfi/H-3142-2011 NR 19 TC 3 Z9 3 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 893 EP 896 DI 10.1109/TASC.2003.814072 PN 1 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UB UT WOS:000184241700203 ER PT J AU Clark, AM van den Berg, ML Ullom, JN AF Clark, AM van den Berg, ML Ullom, JN TI Fabricating NIS tunnel junctions on single crystal superconducting substrate by a lithographic process SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE Al single crystal; microrefrigerators; NIS junction; tunneling ID REFRIGERATION AB We present a novel design for a solid-state microrefrigerator using Normal-Insulator-Superconductor (NIS) tunnel junctions. Cooling of the normal electrode is. achieved by electrons tunneling into the superconducting electrode, providing a means of continuous refrigeration at temperatures below 300 mK. The slow diffusion of quasiparticles away from the tunnel barrier limits the cooling power of thin film NIS microrefrigerators for two reasons. First, the efficiency of energy removal from the normal electrode is reduced as quasiparticles build up in the superconducting electrode. Second, phonons produced by quasiparticle recombination near the junction can enter And heat the normal electrode. Using single crystals as both the substrate and the superconducting electrode can prevent the accumulation of quasiparticles; near the tunnel barrier. A large volume, high purity electrode will allow quasiparticles to rapidly move away from the junction, thereby eliminating the self-heating. We are developing a photolithographic process to fabricate NIS devices on single crystal Al substrates. Presented here are results from test devices with a 50 mum x 50 mum Al-Al2O3-Cu tunnel junction deposited on SiN substrates. C1 Natl Inst Stand & Technol, Boulder, CO 80305 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Clark, AM (reprint author), Natl Inst Stand & Technol, Boulder, CO 80305 USA. NR 9 TC 0 Z9 0 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1111 EP 1113 DI 10.1109/TASC.2003.814168 PN 1 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UB UT WOS:000184241700258 ER PT J AU Friedrich, S Vailionis, A Drury, O Niedermayr, T Funk, T Kang, WN Choi, EM Kim, HJ Lee, SI Cramer, SP Kim, C Labov, SE AF Friedrich, S Vailionis, A Drury, O Niedermayr, T Funk, T Kang, WN Choi, EM Kim, HJ Lee, SI Cramer, SP Kim, C Labov, SE TI A multichannel superconducting tunnel junction detector for high-resolution X-ray spectroscopy of magnesium diboride films SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TX SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperConductiv Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Superconductiv, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Superconductiv & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE Josephson junctions; magnesium diboride; superconducting devices; X-ray spectrometers ID MGB2; SPECTROMETERS; PERFORMANCE; NOISE AB We have built a high-resolution soft x-ray spectrometer using a 3 x 3 array of superconducting Nb-Al-AlOx-Al-Nb tunnel junctions. The detector is cooled to similar to0.1 K by a two-stage adiabatic demagnetization refrigerator while being held at the end of a 40-cm-long detector snout that can be inserted into an experimental chamber. The 0.6 mm x 0.6 mm array has an energy resolution of 10-15 eV FWHM for x-ray energies below I, keV and total count rate capabilities above 100 000 counts/s. We demonstrate the capabilities of the instrument in a study of anisotropy in c-axis oriented MgB2 films by near edge x-ray absorption spectroscopy. The absorption fine structure at the B K-edge differs for excitation with x-rays polarized along the c-axis and in the ab-plane of the MgB2 film. We discuss the implications of the anisotropy for the density of states in MgB2 at the Fermi surface. C1 Lawrence Livermore Natl Lab, Adv Detector Grp, Livermore, CA 94550 USA. Univ Calif Davis, Davis, CA 95616 USA. Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. Pohang Univ Sci & Technol, Natl Creat Res Initiat Ctr Superconduct, Pohang 790784, South Korea. Yonsei Univ, Dept Phys, Seoul 120749, South Korea. RP Lawrence Livermore Natl Lab, Adv Detector Grp, Livermore, CA 94550 USA. EM friedrich1@llnl.gov; arturas@stanford.edu; silee@postech.ac.kr; cykim@phya.yonsei.ac.kr RI Vailionis, Arturas/C-5202-2008 OI Vailionis, Arturas/0000-0001-5878-1864 NR 21 TC 8 Z9 8 U1 1 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1114 EP 1119 DI 10.1109/TASC.2003.814169 PN 1 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UB UT WOS:000184241700259 ER PT J AU Green, MA Corlett, JN Ferracin, P AF Green, MA Corlett, JN Ferracin, P TI Superconducting RF cavities and a 1.9 K cooling system,for a femtosecond light source SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE CW operation; superconducting RF cavities; super-fluid helium AB The proposed femto-second light source consists of a re-circulating linac that delivers an electron beam to an arc of superconducting undulator magnets that deliver very short pulses of x rays to materials science experiments. Superconducting RF cavities accelerate the electrons through the re-circulating linac. The design acceleration gradient for the 1300 MHz RF cavity system is 25 MV per meter. TESLA cavities operating in CW mode can provide this level of acceleration. This report presents the parameters of the proposed femto-second light source superconducting linac. Each nine-cell cavity will generate 44 W of AC loss at 1.9 K. The AC loss is added to the other losses in the accelerator cavity system. The superconducting RF cavity losses and linac refrigeration requirements are summarized in this report. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Green, MA (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 8 TC 0 Z9 0 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1205 EP 1208 DI 10.1109/TASC.2003.812633 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900002 ER PT J AU Kerby, JS AF Kerby, JS TI Production status of the LHC inner triplet magnet system SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE inner triplet; interaction region; LHC; superconducting magnet ID INSERTION QUADRUPOLE MAGNET; INTERACTION REGIONS; FERMILAB; DESIGN AB The inner triplet magnet systems for the LHC provide the final focus of the two proton beams immediately before collision at the four interaction points in the machine. At both the high and low luminosity interaction regions, the quadrupole magnets composing the Q1 through Q3 optical elements are capable of operation at 215 T/m when cooled to 1.9 K, and subjected at the high luminosity interaction points to significant beam heating. The design and production of the system is the result of several years of international collaboration between laboratories and industries on three continents. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Kerby, JS (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 19 TC 3 Z9 3 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1229 EP 1234 DI 10.1109/TASC.2003.812640 PN 2 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900007 ER PT J AU Bossert, R Carcagno, R DiMarco, J Feher, S Glass, H Kashikhin, VV Kerby, J Lamm, MJ Nobrega, A Orris, D Rabehl, R Sabbi, G Schlabach, P Strait, J Sylvester, C Tartaglia, M Tompkins, JC Velev, G Zlobin, AV AF Bossert, R Carcagno, R DiMarco, J Feher, S Glass, H Kashikhin, VV Kerby, J Lamm, MJ Nobrega, A Orris, D Rabehl, R Sabbi, G Schlabach, P Strait, J Sylvester, C Tartaglia, M Tompkins, JC Velev, G Zlobin, AV TI Field measurement of fermilab-built quadrupole magnets for the LHC interaction regions SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE magnetic fields; quadrupole; superconductivity AB Superconducting low-beta quadrupole magnets for the interaction regions of the Large Hadron Collider have been developed,by the US-LHC Accelerator Project. These 70 mm bore 5.5 m quadrupole magnets are intended to operate in superfluid helium at 1.9 K with a nominal field gradient of 215 T/m. Fabrication and testing of these magnets has begun at Fermilab. Magnetic field measurements of the first magnets produced are described and compared with results from prototype magnets as well as with requirements set by machine performance studies. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Lawrence Berkeley Natl Lab, Berkeley, CA USA. RP Bossert, R (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 4 TC 1 Z9 1 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1243 EP 1245 DI 10.1109/TASC.2003.812645 PN 2 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900010 ER PT J AU Chiesa, L Caspi, S Coccoli, M Dietderich, DR Ferracin, P Gourlay, SA Hafalia, RR Lietzke, AF McInturff, AD Sabbi, G Scanlan, RA AF Chiesa, L Caspi, S Coccoli, M Dietderich, DR Ferracin, P Gourlay, SA Hafalia, RR Lietzke, AF McInturff, AD Sabbi, G Scanlan, RA TI Performance comparison of Nb3Sn magnets at LBNL SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE comparison; cos theta; Nb3Sn; racetrack; superconducting magnets AB The Superconducting Magnet group at Lawrence Berkeley National Laboratory has been successfully developing Nb3Sn high-field dipole magnet technology for the last ten years. Noteworthy magnet tests include D20 (50 mm bore, 4-layer cos theta, 12.8 T, accelerator quality dipole), and recent racetrack dipoles. 1) RT1 (2-layer, 12 T, no bore, no training), 2) RD3b (3-layer, 14.7 T, 10 mm bore), 3) RD3c (3-layer, 10 T, low-harmonics 35 mm bore), and 4) some small Nb3Sn magnets that utilized new technology. The performance of these magnets is summarized, comparing 1) cable and magnet,geometry parameters, 2) training behavior, 3) ramp rate sensitivity, 4) RRR measurements, 5) peak temperatures and voltages, and 6) fast flux adjustments that occur during ramping. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Chiesa, L (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 7 TC 11 Z9 11 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1254 EP 1257 DI 10.1109/TASC.2003.812651 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900013 ER PT J AU Hafalia, RR Caspi, S Chiesa, L Coccoli, M Dietderich, DR Gourlay, SA Lietzke, AF O'Neill, JW Sabbi, G Scanlan, RM AF Hafalia, RR Caspi, S Chiesa, L Coccoli, M Dietderich, DR Gourlay, SA Lietzke, AF O'Neill, JW Sabbi, G Scanlan, RM TI An approach for faster high field magnet technology development SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE common coil magnet; mixed-strand cable; Nb3Sn; racetrack coil AB The Superconducting Magnet Program at LBNL has developed a magnet design supporting our new Subscale Magnet Program, that facilitates rapid testing of small superconducting racetrack. coils in the field range of 10-12 Tesla. Several coils have been made from a variety of Nb-3 Sn/Cu cables, insulated, wound, reacted, potted and assembled into a small reusable yoke and shell loading structure. Bladder and key technology have provided a rapid and efficient means for adjusting coil pre-stress during both initial assembly, and between thermal cycles. This affords the opportunity to test moderately long rectangular cable samples under "magnet conditions" on a time scale considerably closer to that for traditional short-sample cable tests. We have built and tested four. coils. with. the initial aim of determining the feasibility of reducing overall conductor costs with "mixed-strand" cables. Details of cost reduction improvements, Oil construction, magnet structure, and assembly procedures are reported, along with the relative performance of the mixed-strand coil. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Hafalia, RR (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 3 TC 27 Z9 27 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1258 EP 1261 DI 10.1109/TASC.2003.812632 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900014 ER PT J AU Sabbi, G Caspi, S Chiesa, L Coccoli, M Dietderich, DR Ferracin, P Gourlay, SA Hafalia, RR Lietzke, AF McInturff, AD Scanlan, RM AF Sabbi, G Caspi, S Chiesa, L Coccoli, M Dietderich, DR Ferracin, P Gourlay, SA Hafalia, RR Lietzke, AF McInturff, AD Scanlan, RM TI Nb3Sn quadrupole magnets for the LHC IR SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE interaction region; Large Hadron Collider; quadrupole; superconducting magnets AB The development of insertion quadrupoles with 205 T/m gradient and 90 nun bore represents a promising strategy to achieve the ultimate luminosity goal of 2.5 x 10(34) cm(-2)s(-1) at the Large Hadron Collider (LHC). At present, Nb-3 Sn is the only practical conductor which can meet these requirements. Since Nb-3 Sn is brittle, and considerably more strain sensitive than NbTi, the design concepts and fabrication techniques developed for NbTi magnets need to be modified appropriately. In addition, IR magnets must provide high field quality and operate reliably under severe radiation loads. The results of conceptual design studies addressing these issues are presented. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Sabbi, G (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 22 TC 11 Z9 11 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1262 EP 1265 DI 10.1109/TASC.2003.812635 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900015 ER PT J AU Zlobin, AV Ambrosio, G Andreev, N Barzi, E Bauer, P Chichili, D Huang, Y Imbasciati, L Kashikhin, VV Lamm, A Limon, P Novitski, I Peterson, T Strait, JB Yadav, S Yamada, R AF Zlobin, AV Ambrosio, G Andreev, N Barzi, E Bauer, P Chichili, D Huang, Y Imbasciati, L Kashikhin, VV Lamm, A Limon, P Novitski, I Peterson, T Strait, JB Yadav, S Yamada, R TI Conceptual design study of Nb3Sn low-beta quadrupoles for 2nd generation LHC IRs SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE accelerator magnet; low-beta quadrupole; Nb3Sn superconductor ID MAGNETS AB Conceptual designs of 96-mm aperture high-gradient quadrupoles based on the Nb-3 Sn superconductor, are being developed at Fermilab for possible 2nd generation IRs with the similar optics as in the current low-beta insertions. Magnet designs and results of magnetic, mechanical, thermal and quench protection analysis for these magnets are presented and discussed. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Zlobin, AV (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 8 TC 10 Z9 10 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1266 EP 1269 DI 10.1109/TASC.2003.812637 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900016 ER PT J AU Kashikhim, VV Barzi, E Chichili, D DiMarco, J Lamm, M Schlabach, P Zlobin, AV AF Kashikhim, VV Barzi, E Chichili, D DiMarco, J Lamm, M Schlabach, P Zlobin, AV TI Passive correction of the persistent current effect in Nb3Sn accelerator magnets SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE hysteresis; magnetic fields; magnetic materials; superconducting magnets ID DIPOLE MAGNETS; MAGNETIZATION; STRANDS AB Superconducting accelerator magnets must provide a uniform field during operation. However, the field quality significantly deteriorates due to persistent currents induced in superconducting filaments. This effect is especially large for the Nb-3 Sn conductor being implemented in the next generation of accelerator magnets. A simple and inexpensive method of passive correction of the persistent current effect was developed and experimentally verified. This paper describes numerical simulations of the passive correctors and reports the test results. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Kashikhim, VV (reprint author), Fermilab Natl Accelerator Lab, MS 316, Batavia, IL 60510 USA. NR 10 TC 9 Z9 9 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1270 EP 1273 DI 10.1109/TASC.2003.812642 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900017 ER PT J AU Andreev, N Barzi, E Bhashyam, S Boffo, C Chichili, DR Yadav, S Terechkine, I Zlobin, AV AF Andreev, N Barzi, E Bhashyam, S Boffo, C Chichili, DR Yadav, S Terechkine, I Zlobin, AV TI Superconducting current transformer for testing Nb3Sn cable splicing technique SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE current transformer; dipole magnets; Nb3Sn cable; superconducting magnets AB To provide a quick feedback on different approaches to superconducting cable splicing design and assembly techniques, a superconducting current transformer that can deliver more than. 20 kA for testing splice sample's was designed and, fabricated. The existing infrastructure of the Short Sample Test Facility at Fermilab, including its cryostat, power supply, and data acquisition system, was used for housing and operating the transformer. This report presents the design features of the transformer and the main results of cable. splice tests. C1 Fermilab Natl Accelerator Lab, Tech Div, Batavia, IL 60510 USA. RP Andreev, N (reprint author), Fermilab Natl Accelerator Lab, Tech Div, Batavia, IL 60510 USA. OI Bhashyam, Srikrishna/0000-0001-9953-0914 NR 5 TC 8 Z9 8 U1 1 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1274 EP 1277 DI 10.1109/TASC.2003.812644 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900018 ER PT J AU Lamm, MJ AF Lamm, MJ TI Nb3Sn accelerator magnet development around the world SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE superconducting accelerator magnets; superconducting cables; superconducting filaments and wires ID SUPERCONDUCTING MAGNETS; DIPOLE MAGNET; MODEL; LHC AB During the past 30 years superconducting magnet systems have enabled accelerators to achieve energies and luminosities that would have been impractical if not impossible with resistive magnets. By far, NbTi has been the preferred conductor for this application because of its ductility and insensitivity of Jc to mechanical strain.-This is despite the fact that Nb-3 Sn has a more favorable Jc vs. B dependence and can operate at much higher temperatures. Unfortunately, NbTi conductor is reaching the limit of it usefulness for high field applications. Despite incremental increases in Jc and operation at superfluid temperatures, magnets are limited to approximately a 10 T field. Improvements in conductor performance combined with future requirements for accelerator magnets to have bore fields greater than 10 T or operate in areas of large beam-induced heat loads now make Nb-3 Sn look attractive. Thus, laboratories in several countries are actively engaged in programs to develop Nb-3 Sn accelerator magnets for future accelerator applications. A summary of this important research activity is presented along with a brief history of Nb-3 Sn accelerator magnet development and a discussion of requirements for future accelerator magnets. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Lamm, MJ (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 30 TC 4 Z9 4 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1278 EP 1283 DI 10.1109/TASC.2003.812646 PN 2 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900019 ER PT J AU Ambrosio, G Andreev, N Barzi, E Bauer, P Bhashyam, S Carcagno, R Chichili, D Ewald, K Feher, S Imbasciati, L Limon, P Lamm, M Novitski, I Orris, D Pischalnikov, Y Sylvester, C Tartaglia, M Tompkins, J Zlobin, AV AF Ambrosio, G Andreev, N Barzi, E Bauer, P Bhashyam, S Carcagno, R Chichili, D Ewald, K Feher, S Imbasciati, L Limon, P Lamm, M Novitski, I Orris, D Pischalnikov, Y Sylvester, C Tartaglia, M Tompkins, J Zlobin, AV TI Fabrication and test of a racetrack magnet using pre-reacted Nb3Sn cable SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE Nb3Sn; react-and-wind technology; superconducting magnets; superconducting materials AB A racetrack magnet, using Nb3Sn superconducting cable reacted before winding, has been fabricated and tested at Fermilab. It consists of two flat racetrack coils, connected in a common-coil configuration, separated by a 5 mm thick fiberglass plate. Synthetic oil was used to prevent sintering of the strands during the heat treatment. The coils were wound and vacuum impregnated in the mechanical structure. The turn-to-turn insulation, consisting of Kapton((R)) and pre-impregnated fiberglass tapes as wide as the cable, was wound together with the bare cable in order to form a continuous inter-turn spacer. The coils were instrumented with voltage taps, temperature sensors, spot heaters and quench heaters. The maximum current achieved was 12 675 A which is 78% of the short sample limit at 5.1 K (minimum temperature in the coil during 75 A/s ramp). Measurement of the temperature margin revealed a low degradation in the innermost turns. Quench performances at different temperatures and ramp rate effects have been measured and are presented and discussed. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Ambrosio, G (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. OI Bhashyam, Srikrishna/0000-0001-9953-0914 NR 8 TC 5 Z9 5 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1284 EP 1287 DI 10.1109/TASC.2003.812647 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900020 ER PT J AU Lietzke, AF Caspi, S Chiesa, L Coccoli, M Dietderich, DR Ferracin, P Gourlay, SA Hafalia, RR McInturff, AD Sabbi, G Scanlan, RM AF Lietzke, AF Caspi, S Chiesa, L Coccoli, M Dietderich, DR Ferracin, P Gourlay, SA Hafalia, RR McInturff, AD Sabbi, G Scanlan, RM TI Test results of RD3c, a Nb3Sn common-coil racetrack dipole magnet SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE magnetic measurements; magnets; Nb3Sn; racetrack; superconducting; test results AB The superconducting magnet group at Lawrence Berkeley National Laboratory has-been developing racetrack coil technology for economical, high-field accelerator magnets from brittle superconductor. Recent tests have demonstrated 1) robust, reusable, double-layer, flat racetrack, wind and react Nb3Sn coils, 2) a reusable, easily assembled coil-support structure that can minimize conductor movement and 3) nearly 15 T dipole fields, without conductor degradation. RD3c was our first attempt to compare measured and calculated field harmonics. A single-layer, Nb3Sn, flat racetrack inner-coil was wound on both sides of a bore-plate and reacted and encapsulated (as before in RD3b). Hard coil-spacers were wound into the inner coils to adjust the geometric field harmonics and identify any problems from hard-spacers. The resulting insert coil-module was sandwiched between existing outer-coil modules, and pre-stressed within the previous yoke and shell structure. The bore-plate was thick enough to protect the rotating coil and its anti-cryostat from this pre-stress. Magnet training started at 77% of the un-degraded short-sample current, and progressed in 15 quenches to 92%, high enough to make realistic, saturated iron magnetic measurements. Although there was considerable training, the multipole dependencies correlated well with calculations. A sub-set of the tests are reported and discussed. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Lietzke, AF (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 6 TC 9 Z9 9 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1292 EP 1296 DI 10.1109/TASC.2003.812652 PN 2 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900022 ER PT J AU Bossert, R Kerby, J Nobrega, F Lamm, MJ Rife, J Feher, S Robotham, W Schlabach, P Yadav, S Zlobin, AB AF Bossert, R Kerby, J Nobrega, F Lamm, MJ Rife, J Feher, S Robotham, W Schlabach, P Yadav, S Zlobin, AB TI Construction experience with MQXB quadrupole magnets built at Fermilab for the LHC interaction regions SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE cable insulation; electric variables measurement; mechanical variables measurement superconducting coils AB Fermilab is building eighteen full length cold masses for the LHC Interaction Region inner triplets. One prototype and several production assemblies have been completed. This paper summarizes the construction details. Topics include coil fabrication, ground insulation,, collaring, instrumentation, electrical testing, and final assembly. In-process measurements are presented and explained. Problems encountered during construction and their solutions are discussed. C1 Fermilab Natl Accelerator Lab, Batavia, IL USA. RP Bossert, R (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL USA. NR 11 TC 10 Z9 10 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1297 EP 1300 DI 10.1109/TASC.2003.812653 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900023 ER PT J AU Barzi, E Bossert, R Feher, S Kerby, J Kashikhin, VV Lamm, MJ Orris, D Ray, G Tartaglia, M Zlobin, AV AF Barzi, E Bossert, R Feher, S Kerby, J Kashikhin, VV Lamm, MJ Orris, D Ray, G Tartaglia, M Zlobin, AV TI Splice testing for LHC quadrupole magnets SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE solder joints; splice; superconducting magnets AB Electrical splices between NbTi Rutherford type cables need to be made for the LHC IR inner triplet quadrupoles. Splices between magnets as well as internal to the magnets are necessary. Various splice configurations, solders, and fluxes have been considered. Testing of these splices at cryogenic temperatures and at various currents has been completed. The results were satisfactory; Fermilab is capable of making excellent low resistance (<1 nOmega) solder joints for the LHC project. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Barzi, E (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 4 TC 2 Z9 2 U1 2 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1301 EP 1304 DI 10.1109/TASC.2003.812654 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900024 ER PT J AU DiMarco, J Glass, H Kerby, J Lamm, AJ Nicol, T Page, T Schlabach, P Sylvester, C Tompkins, JC Velev, G AF DiMarco, J Glass, H Kerby, J Lamm, AJ Nicol, T Page, T Schlabach, P Sylvester, C Tompkins, JC Velev, G TI Alignment of production quadrupole magnets for the LHC interaction regions SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE alignment; cryostat; quadrupole fabrication; stretched wire AB Production has started for the high-gradient superconducting quadrupole magnets developed by the US LHC Accelerator Project for the Interaction Regions of the Large Hadron Collider. The first full-scale Q2 assembly has recently been measured during fabrication at Fermilab. This paper reports on the mechanical alignment processes used during production of the combined cold-mass assembly and during its installation in the cryostat, and the validation of these processes in meeting accelerator requirements. Also presented are the results of measurements of the field axis and roll angle of the completed magnet assembly. Results are compared to machine performance requirements. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP DiMarco, J (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 5 TC 3 Z9 3 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1325 EP 1328 DI 10.1109/TASC.2003.812659 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900030 ER PT J AU Schultz, JH Antaya, T Minervini, JV Radovinsky, AL Smith, BA Camille, RJ Myatt, RL Jason, A Walstrom, P Waynert, JA AF Schultz, JH Antaya, T Minervini, JV Radovinsky, AL Smith, BA Camille, RJ Myatt, RL Jason, A Walstrom, P Waynert, JA TI The advanced hydrotest facility (AHF) large bore quadrupole focusing magnet system SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE magneto-optics; magnets; quadrupoles; super-conducting AB The Advanced Hydrotest Facility (AHF) at Los Alamos will provide proton radiography of large-scale, dynamic events. The large bore (Case II) quadrupole focusing magnets are a subsystem in. this facility, consisting of four complete imaging lines with a total of eight imaging plates and 52 quadrupole magnets. Each large bore quadrupole has an inner winding diameter of 660 mm and provides a gradient of 10.4 T/m with a 300 mm field of view. Each magnet is a two-layer saddle, contained by a three cm steel shell. The conductor is a Rutherford cable, soldered into a C-shaped copper channel. The magnets are. cooled by the forced-flow of two-phase helium through coolant pipes. Since the winding was calculated to absorb bursts of 0.35 J/kg irradiation, both NbTi and Nb-3 Sn designs are being considered. C1 MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Schultz, JH (reprint author), MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA. NR 6 TC 0 Z9 0 U1 1 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1343 EP 1346 DI 10.1109/TASC.2003.812664 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900034 ER PT J AU Cozzolino, J Anerella, M Escallier, J Ganetis, G Ghosh, A Gupta, R Harrison, M Jain, A Marone, A Muratore, J Parker, B Sampson, W Soika, R Wanderer, P AF Cozzolino, J Anerella, M Escallier, J Ganetis, G Ghosh, A Gupta, R Harrison, M Jain, A Marone, A Muratore, J Parker, B Sampson, W Soika, R Wanderer, P TI Magnet engineenng and test results of the high field magnet R&D program at BNL SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE accelerators; common coil; HTS; interaction region; react and wind; superconducting magnets AB The Superconducting Magnet Division at Brookhaven National Laboratory (BNL) has been carrying out design, engineering, and technology development of high performance magnets for future accelerators. High Temperature Superconductors (HTS) play a major role in the BNL vision of a few high performance interaction region (IR) magnets that would be placed in a machine about ten years from now. This paper presents the engineering design of a "react and wind" Nb3Sn magnet that will provide a 12 Testa background field on HTS coils. In addition, the coil production tooling as well as the most recent 10-turn R&D coil test results will be discussed. C1 Brookhaven Natl Lab, Superconducting Magnet Div, Upton, NY 11973 USA. RP Cozzolino, J (reprint author), Brookhaven Natl Lab, Superconducting Magnet Div, Bldg 902A, Upton, NY 11973 USA. NR 6 TC 4 Z9 4 U1 1 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1347 EP 1350 DI 10.1109/TASC.2003.812665 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900035 ER PT J AU Gupta, R Anerella, M Cozzolino, J Escallier, J Ganetis, G Harrison, A Wanderer, P AF Gupta, R Anerella, M Cozzolino, J Escallier, J Ganetis, G Harrison, A Wanderer, P TI Next generation IR magnets for hadron colliders SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE accelerators; interaction region; quadrupoles; react & wind; superconducting magnets AB Brookhaven National Laboratory (BNL) is developing "React & Wind" designs and technology for building long high field accelerator magnets. This paper presents the R&D program for interaction region (IR) magnets made with "Rutherford" cable for the luminosity upgrade of the Large Hadron Collider (LHC). This paper will introduce a few new end design concepts that make the bend radius of the cable in the end independent of the coil aperture. These designs are suitable for building magnets with "React & Wind" technology. C1 Brookhaven Natl Lab, Superconding Magnet Div, Upton, NY 11973 USA. RP Gupta, R (reprint author), Brookhaven Natl Lab, Superconding Magnet Div, Bldg 902A, Upton, NY 11973 USA. NR 4 TC 6 Z9 6 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1351 EP 1354 DI 10.1109/TASC.2003.812666 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900036 ER PT J AU Andreev, N Jason, A Kashikhin, VS Kashikhin, VV Limon, PJ Tompkins, J Walstrom, P AF Andreev, N Jason, A Kashikhin, VS Kashikhin, VV Limon, PJ Tompkins, J Walstrom, P TI Magnetic design of large-bore superconducting quadrupoles for the AHF SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE AHF; large bore; magnetic design; quadrupole; superconducting magnets AB The Advanced Hydrotest. Facility (AHF), under study by LANL, utilizes large-bore superconducting quadrupole magnets to image protons for radiography of fast events. The lens system uses two types of quadrupoles: a large bore (48-cm beam aperture) for wide field of view imaging and a smaller,bore (23 cm aperture) for higher resolution images. The gradients of the magnets are 10.14 T/m and 18.58 T/m with magnetic, lengths of 4.3 m and 3.0 m, respectively. The magnets are sufficiently novel to present a design, challenge. Evaluation and comparisons were made for various types of magnet design: shell and racetrack coils, cold and warm iron, as well as an active superconducting shield. Nb3Sn cable was considered as an alternative to NbTi to avoid quenching under high beam. scattering conditions. Several options are discussed and compared. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Andreev, N (reprint author), Fermilab Natl Accelerator Lab, MS 316, Batavia, IL 60510 USA. NR 6 TC 0 Z9 0 U1 1 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1361 EP 1364 DI 10.1109/TASC.2003.812670 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900039 ER PT J AU Green, MA Rey, JM AF Green, MA Rey, JM TI Superconducting solenoids for an international muon cooling experiment SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE muon cooling; superconducting solenoids AB The international union ionization cooling experiment MICE will consist of two focusing cooling cells and a pair of uniform field solenoids used for particle identification and emittance measurements. The 2.75-meter long cooling cells have a pair of field flip coils and a coupling coil. The 0.52-meter diameter field flip coils surround an absorber that removes transverse and longitudinal momentum from the unions to be cooled. The beam in the absorber is at a minimum beta point so that scattering of the muons is minimized. The 1.7-meter diameter coupling coils are outside of conventional 201.25 MHz RF cavities that accelerate the unions putting longitudinal momentum into the muons without putting back the transverse momentum into the beam. A third set of flip coils helps the moon beam transition from and to the experimental solenoids. The 0.6-meter diameter experimental solenoids have a uniform field region (good to about I part in 1000) that is 1.3-meters long. The MICE experiment magnets must operate as a single unit so that the field profile will produce the maximum muon cooling. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. CENS, F-91191 Gif Sur Yvette, France. RP Green, MA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 5 TC 6 Z9 6 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1373 EP 1376 DI 10.1109/TASC.2003.812676 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900042 ER PT J AU Ninomiya, A Arai, K Takano, K Ishigohka, T Kaiho, K Nakajima, H Tsuji, H Okuno, K Martovetsky, N Rodin, I AF Ninomiya, A Arai, K Takano, K Ishigohka, T Kaiho, K Nakajima, H Tsuji, H Okuno, K Martovetsky, N Rodin, I TI Diagnosis of ITER's large scale superconducting coils using acoustic emission techniques SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE AE; Cable in Conduit (CIC) superconductor; ITER; mechanical disturbance ID SOLENOID MODEL COIL; CS INSERT AB In 2006, Japan Atomic Energy Research Institute (JAERI) and its collaboration team accomplished many kinds of experiments under the magnetic field of 13T for the ITER Project. The target coils are the central solenoid (CS) model coil and the CS insert coil. In 2001, the test using both the CS model coil and the toroidal field (TF) insert coil was carried out and successfully finished. During the experiment, we have measured the change of amount of mechanical disturbances inside the coil using acoustic emission (AE) technology. In this paper, we report the general trend of AE characteristics obtained in the experiments for two years. That is to say, as for the CS model coil, we investigated the training characteristics of the CS model coil that experienced one cooling cycle from 4.2 K to room temperature. As a result, we confirmed the training effect of the CS model coil wound by forced flow CIC conductors. On the other hand, as for the insert coil, some peculiar AE signals were observed during the CS insert coil cyclic test. On this matter, a re-examination was carried out. C1 Seikei Univ, Musashino, Tokyo 1808633, Japan. Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan. Japan Atom Energy Res Inst, Naka, Ibaraki 3110193, Japan. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. DV Efremov Sci Res Inst Electrophys Apparatus, St Petersburg 196641, Russia. RP Ninomiya, A (reprint author), Seikei Univ, Musashino, Tokyo 1808633, Japan. NR 5 TC 3 Z9 3 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1408 EP 1411 DI 10.1109/TASC.2003.812681 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900050 ER PT J AU Okuno, K Martovetsky, N Koizumi, N Sugimoto, M Isono, T Hamada, K Nunoya, Y Matsui, K Kawano, K Kato, T Nakajima, H Oshikiri, M Takano, K Hara, Z Takahashi, R Kubo, T Takahashi, Y Mitchell, N Takayasu, M Minervini, J Arai, K Tsugwa, K Ninomiya, A Ricci, M Savoldi, L Zanino, R AF Okuno, K Martovetsky, N Koizumi, N Sugimoto, M Isono, T Hamada, K Nunoya, Y Matsui, K Kawano, K Kato, T Nakajima, H Oshikiri, M Takano, K Hara, Z Takahashi, R Kubo, T Takahashi, Y Mitchell, N Takayasu, M Minervini, J Arai, K Tsugwa, K Ninomiya, A Ricci, M Savoldi, L Zanino, R TI Test of the NbAl insert and ITER Central Solenoid Model Coil SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TX SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperConductiv Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Superconductiv, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Superconductiv & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE cable-in-conduit conductors; losses; measurements; superconducting magnets AB The Central Solenoid Model Coil (CSMC) was designed and built by an ITER collaboration in 1993-2001. Three heavily instrumented Inserts have been also built for testing in the background field of the CSMC. The Nb(3)Al Insert was designed and built by Japan to explore the feasibility of an alternative to Nb(3)Sn superconductor for fusion magnets. The Nb(3)Al Insert coil was tested in the CSMC Test Facility at the Japan Atomic Energy Research Institute, Naka, Japan in March-May 2002. It was the third Insert tested in this facility under this program. The Nb3Al Insert coil was charged successfully without training in the background field of the CSMC to the design current of 46 kA at 13 T peak field and later was successfully charged up to 60 kA in 12.5 T field. This paper presents the test results overview. C1 Japan Atom Energy Res Inst, Naka, Ibaraki 31101, Japan. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. ITER, Int Team, Naka, Ibaraki, Japan. MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan. Seikei Univ, Musashino, Tokyo 1808633, Japan. EURATOM, ENEA Assoc, I-00044 Frascati, Italy. Politecn Torino, Dipartimento Energet, I-10129 Turin, Italy. RP Okuno, K (reprint author), Japan Atom Energy Res Inst, Naka, Ibaraki 31101, Japan. EM martovetsky1@lln1.gov; mricci@frascati.enea.it NR 8 TC 15 Z9 15 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1437 EP 1440 DI 10.1108/TASC.2003.812692 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900057 ER PT J AU Martovetsky, N Takayasu, M Minervini, J Isono, T Sugimoto, M Kato, T Kawano, K Koizumi, N Nakajima, H Nunoya, Y Okuno, K Tsuji, H Oshikiri, M Mitchell, N Takahashi, Y Egorov, S Rodin, I Zapretilina, E Zanino, R Savoldi, L Arai, K Ninomiya, A Taran, A Vorobieva, A Mareev, K AF Martovetsky, N Takayasu, M Minervini, J Isono, T Sugimoto, M Kato, T Kawano, K Koizumi, N Nakajima, H Nunoya, Y Okuno, K Tsuji, H Oshikiri, M Mitchell, N Takahashi, Y Egorov, S Rodin, I Zapretilina, E Zanino, R Savoldi, L Arai, K Ninomiya, A Taran, A Vorobieva, A Mareev, K TI Test of the ITER TF insert and Central Solenoid Model Coil SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TX SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperConductiv Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Superconductiv, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Superconductiv & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE cable-in-conduit conductors; losses; measurements; superconductor magnets ID FIELD AB The Central Solenoid Model Coil (CSMC) was designed and built by ITER collaboration between the European Union, Japan, Russian Federation and the United States in 1993-2001. Three heavily instrumented insert coils have been also built for testing in the background field of the CSMC to cover a wide operational space. The TF Insert was designed and built by the Russian Federation to simulate the conductor performance under the ITER TF coil conditions. The TF insert Coil was tested in the CSMC Test Facility at the Japan Atomic Energy Research Institute, Naka, Japan in September-October 2001. Some measurements were performed also on the CSMC to study effects of electromagnetic and, cooldown cycles. The TF Insert coil was,charged successfully, without training, in the background field of the CSMC to the design current of 46 kA at 13 T peak field. The TF Insert met or exceeded all design objectives, however some interesting results require thorough analyses. This paper presents the overview of main results of the testing-magnet critical parameters, joint performance, effect of cycles on performance, quench and some results of the post-test analysis. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. Japan Atom Energy Res Inst, Naka, Ibaraki 31101, Japan. ITER, Int Team, Naka, Ibaraki, Japan. Efremov Inst Electro Phys Apparata, St Petersburg, Russia. Politecn Torino, Dipartimento Energet, I-10129 Turin, Italy. Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan. Seikei Univ, Musashino, Tokyo 1808633, Japan. VNIIKP, Podolsk, Russia. AA Bochvar Inorgan Mat Res Inst, Moscow, Russia. RP Martovetsky, N (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM martovetsky1@lln1.gov NR 16 TC 25 Z9 25 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1441 EP 1446 DI 10.1109/TASC.2003.812733 PN 2 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900058 ER PT J AU Gung, CY Minervini, JV Schultz, JH Meinke, RB Goodzeit, CL Sabbi, G Seidl, P AF Gung, CY Minervini, JV Schultz, JH Meinke, RB Goodzeit, CL Sabbi, G Seidl, P TI Tests of prototype quadrupole magnets for heavy ion fusion beam transport SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE heavy ion fusion (HIF); quadrupole magnets; quench training; superconducting magnets AB Four NbTi superconducting prototype quadrupole magnets have been built for the High Current Transport Experiment (HCX) as part of the multi-beam heavy-ion fusion research activity, led by the Lawrence Berkeley National Laboratory (LBNL). MIT performed quench training and ramp rate tests of the two prototype magnets that were designed and built by the Advanced Magnet Lab, Inc. (AML), based on a novel concept featuring cable-in-groove and multi-layer stacking. Both magnets are splice-free without inter-layer or inter-quadrant joint. Each coil was wound with a continuous NbTi round cable, placed in precise grooves machined in G-11 plates. The two magnets differ in their cable construction and their coil and yoke configuration. Each magnet was tested more than once in liquid helium, bath with a room temperature thermal cycle between cold tests. This paper describes the results of the performance tests as well as the instrumentation and the quench protection system. Possible improvements for future coil winding are discussed. C1 Adv Magnet Lab Inc, Palm Bay, FL 32905 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 11 TC 0 Z9 0 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1508 EP 1511 DI 10.1109/TASC.2003.812762 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900074 ER PT J AU Peters, GJ Berger, RE Strauss, BP Sutter, DF AF Peters, GJ Berger, RE Strauss, BP Sutter, DF TI The DOE high energy physics SBIR/STTR superconductivity program SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE history; proposals; SBIR; STTR; superconductivity AB The U.S. Department of Energy has over a 35-year history in the support of superconducting devices. Superconductivity is an enabling technology for its major installed particle accelerators as well as planned projects. The Small Business Innovation Research (SBIR) Program has played a most significant role in the industrial development. of advanced superconducting materials and devices. This paper will give a short history of the pro gram as well as its accomplishments in the field of superconductivity. Current development needs of the Department in High Energy Physics will be explored. Suggestions for participation in, this program will be discussed. C1 US DOE, Germantown, MD 20874 USA. RP Peters, GJ (reprint author), US DOE, Germantown, MD 20874 USA. NR 1 TC 1 Z9 1 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1520 EP 1523 DI 10.1109/TASC.2003.812765 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900077 ER PT J AU Bangerter, R Barnard, J Brown, T Faltens, A Gung, CY Lee, E Lietzke, A Lund, S Manahan, R Martovetsky, N Meinke, R Minervini, J Myatt, L Radovinsky, A Sabbi, G Schultz, J Seidl, P Yu, S AF Bangerter, R Barnard, J Brown, T Faltens, A Gung, CY Lee, E Lietzke, A Lund, S Manahan, R Martovetsky, N Meinke, R Minervini, J Myatt, L Radovinsky, A Sabbi, G Schultz, J Seidl, P Yu, S TI Parameters, and requirements of superconducting focusing quadrupoles for heavy ion fusion SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE superconducting magnet; heavy ion; accelerator ID DESIGN AB In a heavy ion fusion driver, arrays of superconducting quadrupoles will transport parallel beams through a sequence of induction acceleration cells. The development of such arrays is a unique and challenging task. Since magnetic transport is one of the most expensive subsystems, economy of fabrication is a primary consideration. A compact design is essential to limit the size and cost of induction cores. Special edge coils have to be implemented to adjust the field in. outer cells and terminate the magnetic flux. The development of superconducting magnets for both near term experiments. and the ultimate driver application is actively pursued by the U.S. Heavy Ion Fusion Program. The main parameters and requirements are discussed, and the R&D status and plans are presented. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. MIT Plasma Sci & Fus Ctr, Cambridge, MA USA. Adv Magnet Lab, Palm Bay, FL USA. RP Bangerter, R (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 24 TC 3 Z9 3 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1530 EP 1535 DI 10.1109/TASC.2003.812767 PN 2 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900079 ER PT J AU Scanlan, RM Dietderich, DR AF Scanlan, RM Dietderich, DR TI Progress and plans for the USHEP Conductor Development Program SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE Nb3Sn; accelerator magnets; Rutherford cable; strand magnetization ID SUPERCONDUCTORS; MAGNET AB Although existing accelerators utilize NbTi superconductor, it is likely that any future upgrades or new accelerators will require the use of superconductors with higher critical fields, such as Nb3Sn. The High Energy Physics (HEP) program in U.S. Dept. of Energy (DOE) has initiated a conductor development program aimed at developing a high current density, cost-effective conductor for these new applications. The program is industry-based, with a set of target specifications that were derived from the accelerator magnet requirements. Significant progress has been made to date toward the target specifications, and the results Will be presented. Plans for further development, in particular the scale-up tasks required to reduce the conductor cost, will be reviewed. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Scanlan, RM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 17 TC 22 Z9 22 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1536 EP 1541 DI 10.1109/TASC.2003.812768 PN 2 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900080 ER PT J AU James, MR Maloy, SA AF James, MR Maloy, SA TI The performance of high-temperature superconductors-in space radiation environments SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE superconductors; space radiation; cosmic rays; columnar defects; YBCO; BSCCO ID SPLAYED COLUMNAR DEFECTS; CRITICAL-CURRENT DENSITIES; HIGH-TC SUPERCONDUCTORS; 0.8 GEV PROTONS; YBA2CU3O7 CRYSTALS; ION IRRADIATION; FISSION TRACKS; THIN-FILMS; TAPES; ENHANCEMENT AB Space applications of high-temperature super-conductors hold great promise for increasing the performance of a variety of platforms and components. One major concern for the operation of superconductors in space, is their response to the specific radiation environments. These environments can be low-Earth orbits, deep space, or even radiation from on-board reactors. The influences from high-energy electrons, protons, and neutrons, as well as heavy-ion recoils, must all be considered. There exists from previous studies an extensive collection of data regarding the response of various types of superconductors to many different particles and energies. This work. is a review of these data assessing changes in superconductor properties or other life-limiting factors for superconducting components in various mission profiles. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP James, MR (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Maloy, Stuart/A-8672-2009 OI Maloy, Stuart/0000-0001-8037-1319 NR 28 TC 3 Z9 3 U1 2 U2 9 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1600 EP 1603 DI 10.1109/TASC.2003.812802 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900096 ER PT J AU Iwasa, Y Wheatley, R Bascunan, J Haid, B Lee, HG AF Iwasa, Y Wheatley, R Bascunan, J Haid, B Lee, HG TI A solid-nitrogen cooled Nb3SnNMR magnet operating in the range 8-10-K SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE cryocooler-decoupled operation of a superconducting magnet; solid neon; solid nitrogen AB This paper presents a reference design of a solid-nitrogen cooled 300-MHz/25 mm Nb3Sn NMR magnet based on a novel design/operation concept. The magnet operates in the temperature range 8-10 K with its cryocooler thermally decoupled from the magnet and idled. A mass of solid nitrogen in thermal contact with the magnet prolongs the magnet warm-up time to 17 h, during which NMR measurement may be performed under a quiet environment free of the cryocooler's microphonics. At 10 K, the magnet is re-coupled to the cryocooler for recooling to 8 K and ready for another 17-h measurement. C1 MIT, Francis Bitter Natl Magnet Lab, Cambridge, MA 02139 USA. AMI, Oak Ridge, TN 37831 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. FBML, Cambridge, MA 02139 USA. RP Iwasa, Y (reprint author), MIT, Francis Bitter Natl Magnet Lab, Cambridge, MA 02139 USA. NR 4 TC 5 Z9 5 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1636 EP 1639 DI 10.1109/TASC.2003.812851 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900105 ER PT J AU Mulcahy, TM Hull, JR AF Mulcahy, TM Hull, JR TI A superconducting solenoid and press for permanent magnet fabrication SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE anisotropic permanent magnet fabrication; low-temperature superconducting solenoid; magnet powder alignment and compaction AB For the first time, a superconducting solenoid (SCM) was used to increase the remnant magnetization of sintered NdFeB permanent magnets (PMs). In particular, magnetic alignment of commercial-grade PM powder was improved by axial-die pressing the powder into 12.7-mm diameter cylindrical compacts in the 76.2-mm warm bore of a 9-T SCM. The press used to compact the powder is unique and was specifically designed for use with the SCM. Although the press was operated in the batch mode for this proof-of-concept study, its design is intended to enable automated production. In operation, a simple die and punch set made of nonmagnetic materials was filled with powder and loaded into a nonmagnetic press tube. The cantilevered press tube was inserted horizontally, on a carrier manually advanced along a track, into the SCM. The mechanical components and,the SCM, in its liquid helium dewar, were specifically designed to allow for insertion and extraction of,the magnetic,powder and compacts, while operating the solenoid at 9 T. Compaction was achieved by pressing the punches between the closed end of the press tube and the hydraulic cylinder mounted on the opposite end. Improvements up to 10% in magnetization and 20% in energy products of the permanent magnets were obtained, as the alignment fields were increased above the 2-T maximum field of the electromagnets used in industry. For comparison, increases in magnetization of 3% are significant in the mature sintered magnet industry. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Mulcahy, TM (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 4 TC 0 Z9 0 U1 2 U2 7 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1668 EP 1671 DI 10.1109/TASC.2003.812859 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900113 ER PT J AU Yamada, R Marscin, E Lee, A Wake, M Rey, JM AF Yamada, R Marscin, E Lee, A Wake, M Rey, JM TI 2-D/3-D quench simulation using ANSYS for epoxy impregnated Nb3Sn high field magnets SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE ANSYS; quench program; stress distribution AB A quench-program using ANSYS is developed for the high field collider magnet for 3-D analysis. Its computational procedure is explained. The quench program is applied to a one meter Nb3Sn high field model magnet, which is epoxy impregnated. The quench simulation program,is used to estimate the temperature and mechanical stress inside the coil as well as over the whole magnet. It is concluded that for the one meter magnet with the presented cross section and configuration, the thermal effects due to the, quench is tolerable. But we need much more quench study and improvements in the design for longer magnets. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan. CEA Saclay, F-91191 Gif Sur Yvette, France. RP Yamada, R (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 6 TC 13 Z9 14 U1 0 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1696 EP 1699 DI 10.1109/TASC.2003.812870 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900120 ER PT J AU Orris, DF Carcagno, R Feher, S Lamm, MJ Nogiec, J Schlabach, P Tartaglia, M Tompkins, JC AF Orris, DF Carcagno, R Feher, S Lamm, MJ Nogiec, J Schlabach, P Tartaglia, M Tompkins, JC TI A quench management system for testing superconducting magnets SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE instrumentation and controls; quench protection; superconducting magnets AB A quench management system has been developed for the Fermilab Magnet Test Facility as part of the overall data acquisition and control system for testing superconducting accelerator magnets. The quench management system accepts a standard set of quench input signals such as magnet voltages and current, safety interlocks, and power supply status, which are multiplexed from several independent test stands. It also issues a standard set of output control signals that are used to activate the dump, the quench protection heater power supplies, and to control the magnet ramp down in the event of a quench. Triggers generated by the quench management system are used to save the logged quench data. from both the fast and slow data acquisition instrumentation. The hardware architecture of the quench management system will be discussed along With analog quench detection, digital quench. detection, quench logic, and the user interface for configuring and controlling this system. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Orris, DF (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 6 TC 3 Z9 3 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1700 EP 1703 DI 10.1109/TASC.2003.812872 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900121 ER PT J AU Wilson, MN Ghosh, AK ten Haken, B Hassenzahl, WV Kaugerts, J Moritz, G Muehle, C den Ouden, A Soika, R Wanderer, P Wessel, WAJ AF Wilson, MN Ghosh, AK ten Haken, B Hassenzahl, WV Kaugerts, J Moritz, G Muehle, C den Ouden, A Soika, R Wanderer, P Wessel, WAJ TI Cored rutherford cables for the GSI fast ramping synchrotron SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE AC loss; dipole magnet; field error; Rutherford cable; superconducting synchrotron ID AC LOSS; CONDUCTORS; MAGNETS AB The new heavy ion synchrotron facility proposed by GSI will have two superconducting magnet rings in the same tunnel, with rigidities of 200 T(.)m and 100 T(.)m. Fast ramp times are needed, which can cause significant problems for the magnets, particularly in the areas of ac loss and field distortion. This paper discusses the 200 T-m ring, Which will use Costheta magnets based on the RHIC dipole design. We discuss the reasons for choosing Rutherford cable with a resistive. core and report loss measurements carried out on cable samples. These measurements are compared with theoretical calculations' using measured values of inter-strand resistance. Reasonably good agreement is found, but there are indications of nonuniformity in the adjacent resistance R-a. Using these measured parameters, losses and temperature rise are calculated for a RHIC dipole in the operating cycle of the accelerator. A novel insulation scheme designed to promote efficient cooling is described. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Twente, Low Temp div, NL-7500 AE Enschede, Netherlands. Adv Energy Anal, Oakland, CA 94611 USA. GSI Darmstadt, Abt BTE, D-64291 Darmstadt, Germany. RP Wilson, MN (reprint author), Brook House, Abingdon OX14 3AY, Oxon, England. NR 14 TC 15 Z9 15 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1704 EP 1709 DI 10.1109/TASC.2003.812864 PN 2 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900122 ER PT J AU Caspi, S Chiesa, L Ferracin, P Gourlay, SA Hafalia, R Hinkins, R Lietzke, AF Prestemon, S AF Caspi, S Chiesa, L Ferracin, P Gourlay, SA Hafalia, R Hinkins, R Lietzke, AF Prestemon, S TI Calculating quench propagation with ANSYS (R) SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE ANSYS; Nb3Sn cable; quench propagation velocity; superconducting magnets ID NORMAL ZONE; MAGNETS; VELOCITY AB A commercial Finite-Element-Analysis program, ANSYS((R)), is widely used in structural and thermal analysis. With the program's ability to include nonlinear. material properties, and import complex CAD files, one can generate coil geometries and simulate quench propagation in superconducting magnets. A "proof-of-principle" finite element model was developed assuming a resistivity that increases linearly from zero to its normal value at a temperature consistent with the assumed B magnetic field. More sophisticated models could easily include finer-grained coil, cable, structural, and circuit details. A quench is provoked by raising the temperature of an arbitrary superconducting element above its T-c. The time response to this perturbation is calculated using small time-steps to allow convergence between steps. Snapshots of the temperature and voltage distributions allow examination of longitudinal and turn-to-turn quench propagation, quench-front annihilation, and cryo-stability. Modeling details are discussed, and a computed voltage history was compared with measurements from a recent magnet test. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Caspi, S (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 11 TC 25 Z9 26 U1 1 U2 14 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1714 EP 1717 DI 10.1109/TASC.2003.812867 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900124 ER PT J AU Imbasciati, L Bauer, P Ambrosio, G Lamm, MJ Miller, JR Miller, GE Zlobin, AV AF Imbasciati, L Bauer, P Ambrosio, G Lamm, MJ Miller, JR Miller, GE Zlobin, AV TI Effect of thermo-mechanical stress during quench on Nb3Sn cable performance SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE accelerator magnets; Nb3Sn; quench; stress AB Several high field magnets using Nb3Sn superconductor are under development for future particle accelerators. The high levels of stored energy in these magnets can cause high peak temperatures during a quench. The thermo-mechanical stress generated in the winding during the fast temperature rise can result in a permanent damage of the brittle Nb3Sn. Although there are several studies of the critical current. degradation of Nb3Sn strands due to strain, little is. known about how to apply the strain limitations to define a maximum acceptable temperature in the coils during a quench. Therefore, an experimental program was launched, aimed at improving the understanding of the effect of thermo-mechanical stress in coils made from brittle Nb3Sn. A first experiment, reported here, was performed on cables. The experimental results were compared to analytical and finite element models. The next step in our experimental program will be to repeat similar measurements in small racetrack coils and later in full size magnets. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Natl High Magnet Field Lab, Tallahassee, FL USA. RP Imbasciati, L (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 8 TC 5 Z9 5 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1718 EP 1721 DI 10.1109/TASC.2003.812871 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900125 ER PT J AU Grabovickic, R Lue, JW Gouge, MJ Demko, JA Duckworth, RC AF Grabovickic, R Lue, JW Gouge, MJ Demko, JA Duckworth, RC TI Measurements of temperature dependence of the stability and quench propagation of a 20-cm-long RABiTS Y-Ba-Cu-O tape SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE minimum propagation current; quench propagation velocity; stability margin; YBCO tapes AB Thermal stability and quench propagation in a composite tape made of YBa2Cu3Ox (YBCO) superconductor were studied experimentally. Quench propagation in each test was initiated by applying a sequence of a short overcurrent pulse followed by a longer pulse at a typical operating current for the tape. The resulting change in resistivity due to internal heating was measured through voltage taps across different zones of the tape. Measurements were performed as a function of both initial overcurrent and operating current for several operating temperatures between 45 and 80 K. These experimental results provided the thermal stability margin, the minimum propagation current, and the quench propagation velocity for the tape. Experimentally obtained temperature dependence of normal zone propagation velocity was compared with the adiabatic theory taking into account minimum propagation current. It was noted that the measured normal zone propagation velocity compared favorably with the theory at each operating temperature. C1 Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 8 TC 51 Z9 51 U1 1 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1726 EP 1730 DI 10.1109/TASC.2003.812874 PN 2 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900127 ER PT J AU Duckworth, RC Lue, JW Lee, DE Grabovickic, R Gouge, MJ AF Duckworth, RC Lue, JW Lee, DE Grabovickic, R Gouge, MJ TI The role of nickel substrates in the quench dynamics of silver coated YBCO tapes SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE nickel substrate; normal zone propagation; thermal runaway; YBCO stability AB A pair of silver coated YBCO tapes with varying degrees of electrical contact between the silver and the YBCO nickel substrate were studied to examine the impact of nickel on normal zone formation and stability. The YBCO tapes were fabricated using the rolling assisted bi-axially textured (RABiTS) method and 15-cm-long samples with 2 mum of silver were prepared. The samples were place in a conduction cooling environment at 45 K to study quench or recovery when a series of dc transient over-current pulses were applied. We used a series of voltage taps on both the silver and nickel to characterize the nature of the contact between the silver and the nickel through the measured voltages. In as-manufactured samples and those sample with continuous contact between the nickel and silver, we found that the silver and nickel can not be treated as conductors in parallel when a normal zone is present because of current present in the nickel even while sections of the sample remains superconducting. This nonparallel contact makes stability characterization difficult although the samples with intentional contact were able to withstand larger current pulses. In addition, the samples with intentional electrical contact between the silver and nickel exhibited normal zone propagation in both the silver and the nickel with speeds between 4 mm/s and 8 mm/s. C1 Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Duckworth, RC (reprint author), Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA. NR 5 TC 22 Z9 22 U1 0 U2 7 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1768 EP 1771 DI 10.1109/TASC.2003.812887 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900137 ER PT J AU Iwasa, Y Lee, H Fang, JR Haid, B AF Iwasa, Y Lee, H Fang, JR Haid, B TI Quench and recovery of YBCO tape experimental and simulation results SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE bath and forced-flow cooling; quench/recovery; YBCO coated conductor AB This paper presents quench/recovery results, both experimental and simulation, of a 10-cm long YBCO test sample subjected to an over-current pulse. The sample was. cooled by liquid nitrogen, either in a bath or forced through a narrow channel. Bath provides a better cooling than flow, at least for velocities of 3 and 5 cm/s used in the experiment. C1 MIT, Francis Bitter Natl Magnet Lab, Cambridge, MA 02139 USA. Amer Magnet Inc, Oak Ridge, TN 37831 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Iwasa, Y (reprint author), MIT, Francis Bitter Natl Magnet Lab, Cambridge, MA 02139 USA. NR 1 TC 30 Z9 30 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1772 EP 1775 DI 10.1109/TASC.2003.812886 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900138 ER PT J AU Imbasciati, L Volpini, G Ambrosio, G Chichili, DR Pedrini, D Previtali, V Rossi, L Zlobin, AV AF Imbasciati, L Volpini, G Ambrosio, G Chichili, DR Pedrini, D Previtali, V Rossi, L Zlobin, AV TI Thermo-mechanical characterization of insulated and epoxy-impregnated Nb3Sn composites SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE Nb3Sn; superconducting coils; thermal conductivity measurement; thermal contraction measurements AB Nb3Sn is, at present, the best superconductor for high field accelerator magnets. Several models using Nb3Sn are under-development in many laboratories. Knowledge of the thermo-mechanical properties of the impregnated coils is of crucial importance for the design of these magnets. In fact, the performance of epoxy-impregnated coils is sensitive to the thermal conductivity value, especially in case of heating caused by hysteretic losses, which are usually relevant in Nb3Sn magnets, and in the case of continuous heat deposition, such as in magnets near the interaction region of a collider. Thermal contraction measurements are necessary to estimate the stresses during the magnet thermal cycle. Different insulation materials have been studied at Fermilab utilizing various design approaches and fabrication methods. Thermal conductivity, and thermal contraction measurements, at cryogenic temperatures, have been performed respectively at INFN-LASA and Fermilab. The results are reported and discussed in this paper. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Milan, I-20122 Milan, Italy. Ist Nazl Fis Nucl, MI, LASA, I-20133 Milan, Italy. RP Imbasciati, L (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 12 TC 2 Z9 2 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1788 EP 1791 DI 10.1109/TASC.2003.812891 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900142 ER PT J AU Chichili, DR Hoffman, J Zlobin, AV AF Chichili, DR Hoffman, J Zlobin, AV TI Investigation of alternative materials for impregnation of Nb3Sn magnets SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE epoxy; Nb3Sn; polyimides; radiation resistance ID FERMILAB AB Insulation is one of the most important elements of magnet design, which determines the electrical, mechanical, and thermal performance as well as lifetime of the magnet. The exposure to high radiation loads especially for the proposed LHC second-generation interaction region Nb3Sn quadrupoles further limits the choices of the insulation materials. Traditionally Nb3Sn magnets were impregnated with epoxy to improve both the mechanical and electrical properties. However, the acceptable radiation limit for epoxy is low which reduces the lifetime of the magnet. The paper presents the results of the feasibility study to replace epoxy with high radiation-resistant material during vacuum impregnation. The mechanical, thermal and electrical properties of samples impregnated with Matrimid were measured and compared with epoxy-impregnated samples. C1 Fermilab Natl Accelerator Lab, Tech Div, Batavia, IL 60510 USA. RP Chichili, DR (reprint author), Fermilab Natl Accelerator Lab, Tech Div, Batavia, IL 60510 USA. NR 8 TC 5 Z9 5 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1792 EP 1795 DI 10.1109/TASC.2003.812892 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900143 ER PT J AU Xue, YB Mark, S Shoup, S Marken, KR Miao, HP Maarten, M Gourlay, SA Scanlan, R AF Xue, YB Mark, S Shoup, S Marken, KR Miao, HP Maarten, M Gourlay, SA Scanlan, R TI Development of CCVD ceramic insulation for Bi-2212 superconducting wires and Rutherford cables SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE Bi-2212HTS superconducting wire; chemical compatibility; CCVD ceramic insulation; high mechanical strength ID FABRICATION; COATINGS; COILS; TAPES AB A low cost, open-atmosphere deposition technique, Combustion Chemical Vapor Deposition (CCVD) is used to deposit zirconia-based, multi-component insulation films on Bi-2212 tapes for fabricating high temperature superconducting magnet coils. The insulation coatings were investigated in detail in terms of composition, microstructure, and insulation strength versus the deposition temperature and other parameters. Dielectric and mechanical properties and chemical compatibility with BSCCO have been characterized and optimized. The advantage of the CCVD technique in producing multi-component insulating materials with the desired properties are described. A brief evaluation of this insulation coating on Rutherford cables fabricated from Bi-2212 wires is also reported. C1 Microcoating Technol Inc, Atlanta, GA 30341 USA. Oxford Superconducting Technol, Carteret, NJ 07008 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Xue, YB (reprint author), Microcoating Technol Inc, Atlanta, GA 30341 USA. RI Xue, Yibin /C-5936-2009 OI Xue, Yibin /0000-0002-0593-0835 NR 9 TC 2 Z9 2 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1796 EP 1799 DI 10.1109/TASC.2003.812893 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900144 ER PT J AU Zbasnik, JP Corradi, CA Gourlay, SA Green, MA Hafalia, AQ Kajiyama, Y Knolls, MJ LaMantia, RF Rasson, JE Reavill, D Turner, WC AF Zbasnik, JP Corradi, CA Gourlay, SA Green, MA Hafalia, AQ Kajiyama, Y Knolls, MJ LaMantia, RF Rasson, JE Reavill, D Turner, WC TI DFBX boxes-electrical and cryogenic distribution boxes for the superconducting magnets in the LHC straight sections SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE gas cooled leads; HTS leads; lambda plug; superconducting buses AB DFBX distribution boxes provide cryogenic and electrical services to superconducting quadrupoles and to a superconducting dipole at either end of four of the long straight sections in the LHC. The DFBX boxes also provide instrumentation and quench protection to the magnets. Current for the quadrupole and the dipole magnet is delivered through leads that combine HTS and gas cooled leads. Current for the 600 A and,120 A correction magnets is provided by pure gas-cooled leads. The bus bars from the leads to the magnets pass through low leak-rate lambda plugs between 1.8 K and 4.4 K. The heat leak into the 1.9 K region from the liquid helium tank is determined by the design of the lambda plugs. This paper describes the DFBX boxes and their function of delivering current and instrumentation signals to the magnets. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Zbasnik, JP (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 2 TC 6 Z9 6 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1906 EP 1909 DI 10.1109/TASC.2003.812943 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900171 ER PT J AU Demko, JA Lue, JW Gouge, MJ Lindsay, D Roden, M Willen, D Daumling, M Fesmire, JE Augustynowicz, SD AF Demko, JA Lue, JW Gouge, MJ Lindsay, D Roden, M Willen, D Daumling, M Fesmire, JE Augustynowicz, SD TI Cryostat vacuum thermal considerations for HTS power transmission cable systems SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE cryogenic; high-temperature superconductivity; power transmission lines ID LOSSES AB The use of high-temperature superconducting (HTS) materials for power transmission cable applications is being realized in several utility demonstration projects. Both room-temperature and cold-dielectric cable systems rely on a vacuum cryostat to keep the ambient thermal loads it a minimum. For long-term installations, operating 30 years or longer, the thermal-insulating vacuum pressure may increase in sections of a long length installation. Even if only a small section of the total length of the HTS cable system is affected, localized heating of the cable may reduce the performance of the HTS cable system. A study is presented of the effects of degraded vacuum levels on the operation of HTS cables for different cryogenic thermal insulation systems. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Southwire Co, Carrollton, GA 30119 USA. NASA, Kennedy Space Ctr, Cryogen Test Lab, Kennedy Space Ctr, FL 32899 USA. NASA, Kennedy Space Ctr, Dynacs Inc, Kennedy Space Ctr, FL 32899 USA. RP Demko, JA (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 6 TC 8 Z9 9 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1930 EP 1933 DI 10.1109/TASC.2003.812956 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900177 ER PT J AU Fisher, PW Cole, MJ Demko, JA Foster, CA Gouge, MJ Grabovickic, RW Lue, JW Stovall, JP Lindsay, DT Roden, ML Tolbert, JC AF Fisher, PW Cole, MJ Demko, JA Foster, CA Gouge, MJ Grabovickic, RW Lue, JW Stovall, JP Lindsay, DT Roden, ML Tolbert, JC TI Design, analysis, and fabrication of a tri-axial cable system SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE cryogenic terminations; high-temperature superconductivity; power transmission lines AB Encouraged by the positive test results of a similar to1.5-m long prototype tri-axial cable, the Southwire Company/Oak Ridge National Laboratory (ORNL) team has conceived, designed, and,built a 5-m tri-axial cable with three-phase,terminations. The three concentric superconducting phases are made of BSCCO-2223 high-temperature superconducting (HTS) tapes, separated by layers of cold-dielectric (CD) tape. A copper braid is added as the grounding shield. The completed tri-axial cable is enclosed in a flexible cryostat. Cooling of the cable and terminations is achieved by liquid nitrogen flowing,through the annulus between the cable and the cryostat. A challenging analysis and design problem was development and implementation of an insulator material between the concentric phases with high enough thermal conductivity to meet temperature gradient requirements and acceptable mechanical performance (strength and contraction on cool down). The resulting three-phase, CD cable and termination design is nearly as compact as the single-phase, co-axial design developed previously by Southwire/ORNL and represents the highest cable current density achievable in an electric alternating-current power cable. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Southwire Co, Carrollton, GA 30119 USA. RP Fisher, PW (reprint author), Oak Ridge Natl Lab, POB 2009,MS 8071, Oak Ridge, TN 37831 USA. NR 12 TC 18 Z9 19 U1 1 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1938 EP 1941 DI 10.1109/TASC.2003.812969 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900179 ER PT J AU Willis, JO Maley, MP Boenig, HJ Coletta, G Mele, R Nassi, M AF Willis, JO Maley, MP Boenig, HJ Coletta, G Mele, R Nassi, M TI AC losses in prototype multistrand conductors for warm dielectric cable designs SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE alternating current losses; high temperature superconductors; multiphase losses; superconducting power transmission lines ID SUPERCONDUCTORS AB We report on multiphase ac losses in four-layer prototype multi-strand conductors (PMC's) wound from HTS tape provided by American Superconductor Corporation. These conductors are prototype warm (near room temperature) dielectric cable designs, such as for the US Dept. of Energy's Superconductivity Partnership Initiative Project at Detroit Edison. We report, on single phase "two phase" (no current in the PMC but with an external ac magnetic field generated by the two normal conductors arranged at the remaining corners of an equilateral triangle forming a three-phase configuration), and balanced three phase losses. Losses were also measured using a set of saddle coils to apply an ac magnetic field to the PMC. The losses were measured as a function of temperature, frequency, and current. We compare the losses for three PMC's, one (4LA) wound conventionally with equal pitch angles for all layers and the two others (4LB and 4LC) wound to achieve equal current distribution (UCD) among the layers, and thus lower single-phase losses in the operating region. In addition, 4LC was wound with a newer generation tape having a higher critical current. The PMC 4LC was found to have the lowest single, two-phase, and three-phase losses. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Pirelli Cavi & Sistemi, I-20126 Milan, Italy. RP Willis, JO (reprint author), Los Alamos Natl Lab, MS-K763, Los Alamos, NM 87545 USA. NR 10 TC 0 Z9 0 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1960 EP 1963 DI 10.1109/TASC.2003.812949 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900184 ER PT J AU Waynert, JA Boenig, HJ Mielke, CH Willis, JO Burley, BL AF Waynert, JA Boenig, HJ Mielke, CH Willis, JO Burley, BL TI Restoration and testing of an HTS fault current controller SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE current controller; dielectric breakdown; fault current controller; fault current limiter; high temperature superconductor AB A three-phase, 1200 A, 12.5 kV fault current controller using three high temperature superconducting, HTS 4 mH coils, was built by industry and tested in 1999 at the Center Substation of Southern California Edison in Norwalk, CA. During the testing, it appeared that each of the three single-phase units had experienced a voltage breakdown, one externally and two internally. Los Alamos National Laboratory (LANL) was asked by DOE to restore the operation of the fault current controller provided the HTS coils had not been damaged during the initial substation tests. When the internally-failed coil vacuum vessels were opened it became evident that in these two vessels, a flashover had occurred at the high voltage bus section leading to the terminals of the superconducting coil. An investigation into the failure mechanism resulted in six possible causes for the flashover. Based on these causes, the high voltage bus was completely redesigned. Single-phase tests were successfully performed on the modified unit at a 13.7 kV LANL substation. This paper presents the postulated voltage flashover failure mechanisms, the new high voltage bus design which mitigates the failure mechanisms, the sequence of tests used to validate the new design, and finally, the results of variable load and short-circuit tests with the single-phase unit operating on the LANL 13.7 kV substation. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Gen Atom, San Diego, CA 92121 USA. RP Waynert, JA (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 5 TC 20 Z9 20 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 1984 EP 1987 DI 10.1109/TASC.2003.812958 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900190 ER PT J AU Cha, YS AF Cha, YS TI An empirical correlation for E(J, T) of a melt-cast-processed BSCCO-2212 superconductor under self field SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE fault current limiters; flux-creep resistivity; magnetic diffusion; magnetic relaxation ID HIGH-TEMPERATURE SUPERCONDUCTORS; C SUPERCONDUCTORS; MAGNETIC DIFFUSION AB An empirical correlation is developed for the electrical field strength E(J, T) of a melt-cast processed BSCCO2212 superconductor. The empirical correlation is based, in part, on the theory of magnetic relaxation and on experimental data at 77 and 87 K. It is developed for temperatures in the range between 77 and 92 K, which is the range of interest for practical devices-such as the superconducting fault-current limiters. The general form of the correlation may be applicable to other high-T-c superconductors. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. RP Cha, YS (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 11 TC 13 Z9 13 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2028 EP 2031 DI 10.1109/TASC.2003.812976 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900201 ER PT J AU Hanany, S Matsumura, T Johnson, B Jones, T Hull, JR Ma, KB AF Hanany, S Matsumura, T Johnson, B Jones, T Hull, JR Ma, KB TI A cosmic microwave background radiation polarimeter using superconducting bearings SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TX SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperConductiv Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Superconductiv, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Superconductiv & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang ID ANGULAR SCALE INTERFEROMETER; ENERGY-STORAGE SYSTEM; MAGNETIC BEARINGS; MAXIMA-1; DRAG AB Measurements of the polarization of the cosmic microwave background (CMB) radiation Are expected to significantly increase our understanding of the early universe. We present a design for a CMB polarimeter in which a cryogenically cooled half wave plate rotates by means of a high-temperature superconducting (HTS) bearing. The design is optimized for implementation in MAXIPOL, a balloon-borne CMB polarimeter. A prototype bearing, consisting of commercially available ring-shaped permanent magnet and an array of YBCO bulk HTS material, has been constructed. We measured the coefficient of friction as a function of several parameters including temperature between 15 and 80 K, rotation frequency between 0.3 and 3.5 Hz, levitation distance between 6 and 10 mm, and ambient pressure between 10(-7) and 1 torr. The low rotational drag of the HTS bearing allows rotations for long periods of time with minimal input power and negligible wear and tear,thus making this technology suitable for a future satellite mission. C1 Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Houston, Texas Ctr Superconduct, Houston, TX 77004 USA. RP Hanany, S (reprint author), Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA. EM hanany@physics.umn.edu NR 33 TC 23 Z9 23 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2128 EP 2133 DI 10.1109/TASC.2003.813016 PN 2 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900226 ER PT J AU Day, AC Hull, JR Strasik, M Johnson, PE McCrary, KE Edwards, J Mittleider, JA Schindler, JR Hawkins, RA Yoder, ML AF Day, AC Hull, JR Strasik, M Johnson, PE McCrary, KE Edwards, J Mittleider, JA Schindler, JR Hawkins, RA Yoder, ML TI Temperature and frequency effects in a high-performance superconducting bearing SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE flywheel energy storage; levitation; superconducting bearing ID ENERGY-STORAGE SYSTEM; MAGNETIC BEARING; HTS BEARINGS; FORCES AB A high-temperature superconducting (HTS) bearing was fabricated and tested by itself and as a component in a 1-kWh and a 10-kWh flywheel energy system (FES). The rotational losses of the HTS bearing as a function of rotational rate and HTS temperature were determined. The 1-kWh FES was tested with a motor/generator and with an eddy current clutch to determine the motor/generator losses. C1 Boeing Phantom Works, Seattle, WA 98124 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Day, AC (reprint author), Boeing Phantom Works, Seattle, WA 98124 USA. NR 10 TC 20 Z9 22 U1 2 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2179 EP 2184 DI 10.1109/TASC.2003.813028 PN 2 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900238 ER PT J AU Sumption, MD Collings, EW Scanlan, RM Nijhuis, A AF Sumption, MD Collings, EW Scanlan, RM Nijhuis, A TI AC loss of Nb3Sn-based Rutherford cables with internally and externally added Cu SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE AC loss; contact resistance; Nb3Sn; Rutherford cable ID CONTACT RESISTANCE; COUPLING LOSSES; FIELDS; CORE AB Calorimetric measurements of AC loss and hence interstrand contact resistances (ICR) were measured on various stabilized (Cu-added) Nb3Sn Rutherford cables. The cable variations formed two sets; externally added Cu and internally added Cu (mixed strand cables). In the first set, Cu strips were diffusion bonded onto a pre-existing cable. Two distinct variants were made, in the first a Cu strip was added to the "upper" find "lower" cable surfaces and then diffusion bonded during a reaction heat treatment (RHT) of 180 h/650degreesC under a "cold-applied pressure" of 20 MPa. The second was formed by diffusion bonding a helically wrapped Cu strip along the cable. A control cable with no strip was included in this set. The second set consisted of a cable with approximately 113 of the strands replaced with pure Cu wires during the cable winding, and here also a control cable was fabricated for comparison. Calorimetric measurements of AC loss were made on all cables at 4.2 K in a transverse sinusoidal field of amplitude 400 mT, frequency 5 to 90 mHz, applied both parallel and perpendicular to the face of the cable. The loss data were interpreted in terms of an effective interstrand contact resistance, R-perpendicular to,R-eff. C1 Ohio State Univ, LASM, MSE, Columbus, OH 43210 USA. LBNL, Supercond Magnet Grp, Berkeley, CA 92740 USA. Univ Twente, Fac Appl Phys, Low Temp Div, NL-7500 AE Enschede, Netherlands. RP Sumption, MD (reprint author), Ohio State Univ, LASM, MSE, Columbus, OH 43210 USA. RI Sumption, Mike/N-5913-2016 OI Sumption, Mike/0000-0002-4243-8380 NR 12 TC 4 Z9 4 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2376 EP 2379 DI 10.1109/TASC.2003.813073 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900286 ER PT J AU Soika, R Anerella, MD Ghosh, AK Wanderer, P Wilson, MN Hassenzahl, WV Kaugerts, J Moritz, G AF Soika, R Anerella, MD Ghosh, AK Wanderer, P Wilson, MN Hassenzahl, WV Kaugerts, J Moritz, G TI Inter-strand resistance measurements in cored Nb-Ti Rutherford cables SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE AC loss; crossover resistance; interstrand resistance; Rutherford cable ID LHC MAIN MAGNETS; SUPERCONDUCTING CABLES AB Cored Nb-Ti Rutherford cables with high crossover resistance R-c are being investigated to minimize ac losses in a set of superconducting dipole magnets for the proposed rapid cycling heavy ion synchrotron facility at the Geselischaft fur Schwerionenforschung (GSI) in Darmstadt, Germany. This ring of magnets is based on the Relativistic Heavy Ion Collider (RHIC) design. R-c in cored cables is significantly larger than the contact resistance between adjacent strands R-alpha. The latter, however, dominates the voltage profile when the interstrand contact resistance is measured via the usual VI technique. This makes the extraction of the magnitude of R-c out of the voltage profile very difficult. Knowledge of R-c is important to predict ac losses, because if R-c and R-alpha were equal, perpendicular field induced losses due to R-c would be around 50 times greater than those induced. by R-alpha. Because of the importance of the crossover resistance, we have developed a novel measurement technique for R-c in cored Nb-Ti Rutherford cables. The procedure involves removing the edges of the conductors along the region to be measured. We have measured the cables using the new technique and the usual VI technique. We describe the novel measurement technique and present results for cables made with different core materials. While measuring R-c, we found evidence that R-alpha is nonuniform over the length of a twist pitch and is in fact significantly lower at the cable edge. We report on this as well. C1 Brookhaven Natl Lab, Supercond Magnet Div, Upton, NY 11973 USA. Adv Energy Anal, Piedmont, CA 94611 USA. Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany. RP Soika, R (reprint author), Brookhaven Natl Lab, Supercond Magnet Div, Upton, NY 11973 USA. NR 7 TC 8 Z9 8 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2380 EP 2383 DI 10.1109/TASC.2003.813077 PN 2 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UD UT WOS:000184241900287 ER PT J AU Rupich, MW Schoop, U Verebelyi, DT Thieme, C Zhang, W Li, X Kodenkandath, T Nguyen, N Siegal, E Buczek, D Lynch, J Jowett, M Thompson, E Wang, JS Scudiere, J Malozemoff, AP Li, Q Annavarapu, S Cui, S Fritzemeier, L Aldrich, B Craven, C Niu, F Schwall, R Goyal, A Paranthaman, M AF Rupich, MW Schoop, U Verebelyi, DT Thieme, C Zhang, W Li, X Kodenkandath, T Nguyen, N Siegal, E Buczek, D Lynch, J Jowett, M Thompson, E Wang, JS Scudiere, J Malozemoff, AP Li, Q Annavarapu, S Cui, S Fritzemeier, L Aldrich, B Craven, C Niu, F Schwall, R Goyal, A Paranthaman, M TI YBCO coated conductors by an MOD/RABiTS (TM) process SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE epitaxial films; high temperature superconductors; MOD; YBa2Cu3O7-x; RABiTS (TM) ID CRITICAL-CURRENT DENSITY; GRAIN-BOUNDARIES; THIN-FILMS; YBA2CU3O7-X; DEPOSITION; PROGRESS; GROWTH; RAMAN AB Commercialization of YBa2Cu3O7-x (YBCO) superconducting coated conductor composite (CCC) technology requires a cost-effective continuous manufacturing process. High critical current YBCO CCC wires with excellent uniformity over length have been fabricated using an all-continuous process. The conductor architecture consists of a metal organic derived YBCO layer, coated on a deformation-textured NiW alloy substrate buffered with Y2O3/YSZ/CeO2. Critical current at 77 K, self-field, of up to 118 A was achieved in 1 cm-wide tapes over 1.25 meter lengths, with a standard deviation of 3% measured on a 5 cm scale. The high uniformity and performance supports the feasibility of commercial long-length CCC wire based on deformation textured metal substrates and solution-based deposition of YBCO. C1 Amer Superconductor, Westborough, MA 01581 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Rupich, MW (reprint author), Amer Superconductor, Westborough, MA 01581 USA. RI Paranthaman, Mariappan/N-3866-2015 OI Paranthaman, Mariappan/0000-0003-3009-8531 NR 21 TC 81 Z9 82 U1 0 U2 10 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2458 EP 2461 DI 10.1109/TASC.2003.811820 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400003 ER PT J AU Solovyov, VF Wiesmann, HJ Wu, LJ Zhu, YM Suenaga, M Norton, D Marken, KR AF Solovyov, VF Wiesmann, HJ Wu, LJ Zhu, YM Suenaga, M Norton, D Marken, KR TI A method for improving nucleation of thick YBCO films in the ex-situ process SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE barium fluoride process; coated conductors; YBCO ID GROWTH AB Some coated conductor applications require a YBCO layer at least 5 mum thick with high J(c). The growth of thick c-axis oriented epitaxial layers using the barium fluoride ex-situ technology is not always possible. Films over 3 mum thick have more undesirable a-oriented and random grains than thinner ones. We present an analysis of thick film nucleation and conclude that thick precursor layers impede, out-diffusion of the ex-situ reaction product, HF. High impedance for HF diffusion results in large variations of the chemical potential of the growth reaction and disruption of the nucleation process. We conclude that a solution for c-axis growth is control of the precursor permeability. A method is described for controlling the permeability of precursor layers. Using this technique we were able to grow c-axis oriented 5-mum thick films on oxide-buffered Ni tape with J(c)(0 T) = 4 x 10(5) A/cm(2) and J(c)(1 T) = 8 x 10(4) A/cm(2). C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Florida, Gainesville, FL 32611 USA. Oxford Superconducting Techn, Carteret, NJ 07008 USA. RP Solovyov, VF (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. RI Solovyov, Vyacheslav/A-7724-2009; OI Solovyov, Vyacheslav/0000-0003-1879-9802 NR 5 TC 6 Z9 7 U1 0 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2474 EP 2476 DI 10.1109/TASC.2003.811824 PN 3 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400007 ER PT J AU Paranthaman, MP Aytug, T Kang, S Feenstra, R Budai, JD Christen, DK Arendt, PN Stan, L Groves, JR DePaula, RF Foltyn, SR Holesinger, TG AF Paranthaman, MP Aytug, T Kang, S Feenstra, R Budai, JD Christen, DK Arendt, PN Stan, L Groves, JR DePaula, RF Foltyn, SR Holesinger, TG TI Fabrication of high J(c)YBa(2)Cu(3)O(7-delta) tapes using the newly developed lanthanum manganate single buffer layers SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE buffer layers; coated conductors; IBAD-MgO substrates; YBCO ID CRITICAL-CURRENT DENSITY; YBA2CU3O7-X THIN-FILMS; COATED CONDUCTORS; SUPERCONDUCTING TAPES; EVAPORATION; GROWTH AB High J(c)YBa(2)Cu(3)O(7-delta) (YBCO) films have been fabricated on LaMnO3 buffered ion-beam assisted deposition (IBAD) MgO template layers. A LaMnO3 buffer layer is compatible with MgO surfaces and also provides a good template for growing high current density YBCO films. LaMnO3 buffer layers were deposited using rf magnetron sputtering. On LaMnO3-buffered-MgO (100) single crystal substrates, YBCO films with a J(c) of over 4 M/cm(2) were grown using both pulsed laser deposition (PLD) and ex-situ BaF2 process. Using PLD, J(c) of 1.8 MA/cm(2) at 77 K was obtained on 200-nm-thick YBCO films grown on LaMnO3-buffered MgO IBAD/Ni-alloy substrates. In addition, an I-c of 230 A/cm-width was obtained for 1.65-mum-thick YBCO films grown on LaMnO3-buffered MgO IBAD/Ni-alloy substrates using PLD at Los Alamos National Laboratory. This performance is comparable to the best single-layer results achieved on IBAD-MgO substrates. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Paranthaman, MP (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Paranthaman, Mariappan/N-3866-2015; Budai, John/R-9276-2016 OI Paranthaman, Mariappan/0000-0003-3009-8531; Budai, John/0000-0002-7444-1306 NR 12 TC 23 Z9 23 U1 0 U2 12 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2481 EP 2483 DI 10.1109/TASC.2003.811826 PN 3 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400009 ER PT J AU Matias, V Gibbons, BJ Findikoglu, AT Kreiskott, S Bronisz, L Peterson, D AF Matias, V Gibbons, BJ Findikoglu, AT Kreiskott, S Bronisz, L Peterson, D TI Accelerated coated conductor program at Los Alamos National Laboratory SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE coated conductors (CC); combinatorial synthesis; HTS; ion-beam assisted deposition (IBAD); MgO; YBCO ID YBA2CU3O7-X THIN-FILMS; BUFFER LAYERS; SUPERCONDUCTING TAPES; DEPOSITION; MGO AB In order to accelerate research and development of coated conductors (CC), a new facility has been developed at Los Alamos National Laboratory (LANL) with labs dedicated to scaled-up fabrication and characterization of CC. These laboratories include facilities for metal tape preparation, ion-beam assisted deposition (IBAD) of template layers, superconductor deposition by laser ablation (PLD), as well as materials characterization including low-temperature transport measurements. The work builds on the prior successes of the LANL CC program, such as the benchmark results of critical currents over 300 A on 1-cm-wide short samples deposited via IBAD and PLD. The new labs have recently been completed and include the ability for reel-to-reel tape processing and characterization. Fabrication of long lengths of tape (> 10 m) allow for. high-throughput experimentation by linear combinatorial design. This facility is also made to enable collaboration with industrial and other partners. C1 Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA. RP Matias, V (reprint author), Los Alamos Natl Lab, Superconduct Technol Ctr, POB 1663, Los Alamos, NM 87545 USA. NR 15 TC 25 Z9 25 U1 1 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2488 EP 2491 DI 10.1109/TASC.2003.811828 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400011 ER PT J AU Blaugher, RD Bhattacharya, RN Chen, J AF Blaugher, RD Bhattacharya, RN Chen, J TI Bi-2212: An HTS coated conductor SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TX SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperConductiv Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Superconductiv, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Superconductiv & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE Bi-2212 superconducting thick films; critical current density; electrodeposition; pulsed laser deposition ID THICK-FILMS; GROWTH; TAPES; FIELD; WIRES AB The Bi-2223 high-temperature-superconductor (HTS) powder-in-tube (PIT) tape, with useful performance for long lengths, has provided the ability to construct a wide range of HTS electric power components. The eventual commercialization of HTS power apparatus is primarily dependent on lowering the cost of HTS conductor. The present performance and cost of state-of-the-art Bi-2223 HTS tape, although acceptable for prototype construction, is viewed as a major factor that may compromise eventual commercialization. The so-called "second generation" coated conductor development, with emphasis on conductors employing HTS YBCO films, is viewed as the solution to this performance and cost issue. The potential for Bi-2212 for producing a low-cost HTS coated conductor as an alternative to Bi-2223 PIT (and YBCO) will be discussed with some recent results on Bi-2212 "coated conductor" development. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Natl Renewable Energy Lab, Golden, CO 80401 USA. EM richard_blaugher@nrel.gov NR 13 TC 0 Z9 0 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2496 EP 2499 DI 10.1109/TASC.2003.811830 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400013 ER PT J AU Wang, LB Price, MB Kwon, C Jia, QX AF Wang, LB Price, MB Kwon, C Jia, QX TI Variable temperature scanning laser microscopy of wider width high temperature superconducting films SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE epitaxial superconducting film; spatial nonuniformity; superconducting transition temperature; variable temperature scanning laser microscopy ID JUNCTIONS; CURRENTS; TAPES AB We have investigated the spatial distribution of resistive properties in 2 mm wide and 10 mm long epitaxial superconducting films using a variable temperature scanning laser microscopy (VTSLM). This technique measures ac voltage of bolometric response created by a laser beam. We have observed the spatial nonuniformity of super conducting transition temperature in the resistive region, which has never been reported in samples wider than 300 mum using scanning laser techniques. This result is a significant step toward developing VTSLM for coated conductor diagnosis. C1 Calif State Univ Long Beach, Dept Phys & Astron, Long Beach, CA 90840 USA. Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA. RP Wang, LB (reprint author), Calif State Univ Long Beach, Dept Phys & Astron, Long Beach, CA 90840 USA. RI Kwon, Chuhee/A-8687-2008; Jia, Q. X./C-5194-2008 NR 15 TC 3 Z9 3 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2611 EP 2613 DI 10.1109/TASC.2003.811908 PN 3 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400042 ER PT J AU Zhai, HY Christen, HM Martin, PM Zhang, L Lowndes, DH AF Zhai, HY Christen, HM Martin, PM Zhang, L Lowndes, DH TI Direct electrical heating of metal tape substrates for coated conductor deposition SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE coated conductors; RABiTS; resistance tape heater; YBa2Cu3O7 AB A novel resistance heater, in which electrical current flowing directly through the metallic tape substrate induces the heating, was designed for the growth of high temperature superconductor, tapes by pulsed laser deposition (PLD). YBa2Cu3O7-delta (YBCO) films grown on RABiTS (rolling assisted bi-axially textured substrates) show properties similar to those of PLD-grown films on substrates that were mounted on a heater block using silver paint. The advantages of this electrical heating method are presented, including the easily adjustable angle between the substrate surface and the plume direction. No physical contact to the back of the substrate is required in the deposition area, eliminating problems related to thermal conductivity, heater block roughness, or the use of silver paint. C1 Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Zhai, HY (reprint author), Oak Ridge Natl Lab, Div Solid State, POB 2008, Oak Ridge, TN 37831 USA. RI Christen, Hans/H-6551-2013 OI Christen, Hans/0000-0001-8187-7469 NR 4 TC 3 Z9 3 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2622 EP 2624 DI 10.1109/TASC.2003.811912 PN 3 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400045 ER PT J AU Cantoni, C Christen, DK Goyal, A Heatherly, L List, FA Ownby, GW Zehner, DM Christen, HM Rouleau, CM AF Cantoni, C Christen, DK Goyal, A Heatherly, L List, FA Ownby, GW Zehner, DM Christen, HM Rouleau, CM TI Growth of oxide seed layers on Ni and other technologically interesting metal substrates: Issues related to formation and control of sulfur superstructures for texture optimization SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE buffer layers; coated conductors; epitaxial films; metal surface ID ADSORPTION; OXYGEN; FILMS AB The current carrying capabilities of RABiTS are connected to the crystalline quality of the seed buffer layer and the stability of the metal/seed layer interface. Our study shows that the epitaxial growth of commonly used seed layers on textured Ni is mediated by a sulfur superstructure present on the metal surface. Many structural defects generated during seed layer growth (secondary orientations, in-plane rotation, incomplete cube texture) can be related to the S surface concentration and superstructure coverage. More generally, our results indicate that the epitaxial deposition of several classes of oxides (fluorite, perovskite, RE2O3) on several {100}<100> fee metals depends, in addition to chemical stability and lattice match, on the existence and optimization of S superstructures on the metal surface. On these bases, we discuss issues related to the growth of different oxides on Ni, Ni-alloys; and Pd surfaces having different chemical and structural properties. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Cantoni, C (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Christen, Hans/H-6551-2013; Rouleau, Christopher/Q-2737-2015; Cantoni, Claudia/G-3031-2013 OI Christen, Hans/0000-0001-8187-7469; Rouleau, Christopher/0000-0002-5488-3537; Cantoni, Claudia/0000-0002-9731-2021 NR 9 TC 11 Z9 12 U1 0 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2646 EP 2650 DI 10.1109/TASC.2003.811936 PN 3 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400052 ER PT J AU Jia, QX Foltyn, SR Arendt, PN Holesinger, T Groves, JR Hawley, M AF Jia, QX Foltyn, SR Arendt, PN Holesinger, T Groves, JR Hawley, M TI Growth and characterization of SrRuO3 buffer layer on MgO template for coated conductors SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE buffer layer; coated conductor; superconducting films; thick films; thin films ID YBA2CU3O7-DELTA THICK-FILMS; ELECTRODES AB Recently, it has been shown that biaxially oriented MgO deposited by ion-beam-assisted-deposition (IBAD) is a significantly more cost-effective template for coated conductors. Nevertheless, the lack of good buffer layer materials for MgO has limited the accomplishment of high quality YBCO films. We, for the first time, have used SrRuO3 as a single buffer layer directly on an MgO template (homo-epitaxial MgO/IBAD-MgO) for growth of thick YBCO films on polycrystalline metal substrates. By using SrRuO3 as a buffer layer, we have routinely obtained YBCO films with an in-plane mosaic spread in the range of 3 - 6degrees full width at half maximum. A critical current density of 1.8 x 10(6) A/cm(2) in self-field at 75 K for a film thickness of over 1.0 mum has been achieved. We have further achieved a current per unit width of over 245 A/cm, which is the highest reported so far for a YBCO film on a polycrystalline metal substrate using MgO as a template. C1 Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA. RP Jia, QX (reprint author), Los Alamos Natl Lab, Superconduct Technol Ctr, POB 1663, Los Alamos, NM 87545 USA. RI Jia, Q. X./C-5194-2008 NR 9 TC 6 Z9 6 U1 0 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2655 EP 2657 DI 10.1109/TASC.2003.811938 PN 3 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400054 ER PT J AU Sathyamurthy, S Paranthaman, MP Zhai, HY Kang, SK Christen, HM Cantoni, C Goyal, A Martin, PM AF Sathyamurthy, S Paranthaman, MP Zhai, HY Kang, SK Christen, HM Cantoni, C Goyal, A Martin, PM TI Solution processing of lanthanum zirconate films as single buffer layers for high I-c YBCO coated conductors SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE all-solution buffer layers; coated conductors; lanthanum zirconate; single buffer layer AB Sol-gel processing of lanthanum zirconate (La2Zr2O7 - referred to as LZO) buffer layers on biaxially textured nickel and Ni-3 at. % W alloy substrates using spin coating and a continuous reel-to-reel dip-coating unit has been studied. The epitaxial LZO films obtained have a strong cube texture and uniform microstructure. This coating and annealing process was repeated to get the desired buffer layer thickness. On these all-solution single buffer layer substrates, YBCO films were grown using pulsed laser deposition process. Critical current density about 2 MA/cm(2) at 77 K and self-field has been obtained on these samples. Continuous processing of these substrates and processing of high I-c YBCO films on them will be discussed. C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Sathyamurthy, S (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RI Christen, Hans/H-6551-2013; Paranthaman, Mariappan/N-3866-2015; Cantoni, Claudia/G-3031-2013 OI Christen, Hans/0000-0001-8187-7469; Paranthaman, Mariappan/0000-0003-3009-8531; Cantoni, Claudia/0000-0002-9731-2021 NR 6 TC 27 Z9 27 U1 0 U2 8 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2658 EP 2660 DI 10.1109/TASC.2003.811940 PN 3 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400055 ER PT J AU Aytug, T Paranthaman, M Kang, S Zhai, HY Leonard, KJ Vallet, CE Sathyamurthy, S Christen, HM Goyal, A Christen, DK AF Aytug, T Paranthaman, M Kang, S Zhai, HY Leonard, KJ Vallet, CE Sathyamurthy, S Christen, HM Goyal, A Christen, DK TI LaMnO3: A single oxide buffer layer for high-J(c) YBa2Cu3O7-delta coated conductors SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE buffer layers; coated conductors; high temperature superconductors; RABiTS ID ELECTRON-BEAM EVAPORATION; CRITICAL-CURRENT DENSITY; SUPERCONDUCTING TAPES; NI; DEPOSITION; GROWTH; FILMS; YBCO AB Single buffer layer of LaMnO3 (LMO) has been epitaxially grown on biaxially textured Ni and Ni-alloy substrates by sputter deposition. The property characterizations revealed that LMO buffers can serve both as a chemical as well as a structural buffer for YBa2Cu3O7-delta (YBCO) films. Epitaxial YBCO films grown on LMO buffers using pulsed laser deposition (PLD) have self-field critical current densities (J(c)) exceeding 1 X 10(6) A/cm(2) at 77 K. The present results have demonstrated the strong prospect of LMO for the practical development of YBCO coated conductors. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Aytug, T (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Christen, Hans/H-6551-2013; Paranthaman, Mariappan/N-3866-2015 OI Christen, Hans/0000-0001-8187-7469; Paranthaman, Mariappan/0000-0003-3009-8531 NR 11 TC 14 Z9 17 U1 0 U2 7 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2661 EP 2664 DI 10.1109/TASC.2003.811942 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400056 ER PT J AU Koritala, RE Ma, BH Miller, DJ Li, MY Fisher, BL Balachandran, U AF Koritala, RE Ma, BH Miller, DJ Li, MY Fisher, BL Balachandran, U TI Texture development of MgO buffer layers grown by inclined substrate deposition SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE buffer layers; electron microscopy; inclined substrate deposition; superconducting films ID YTTRIA-STABILIZED-ZIRCONIA; THIN-FILMS; BICRYSTALS; YBA2CU3O7 AB Biaxially textured magnesium oxide (MgO) films used as template layers for YBa2Cu3O7-x (YBCO)-coated conductors have been grown efficiently and consistently by inclined substrate deposition (ISD). Further improvement in texture and a decrease in surface roughness were obtained by depositing a homoepitaxial MgO layer on the ISD MgO layer at an elevated temperature and flat angle. The texture of the ISD layer was studied as a function of thickness by X-ray diffraction and scanning and transmission electron microscopy. Surface roughness of the ISD and homoepitaxial layers was investigated by atomic force microscopy. Based on the results, the optimal thickness of the ISD layer was determined. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Koritala, RE (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Koritala, Rachel/F-1774-2011; Ma, Beihai/I-1674-2013 OI Ma, Beihai/0000-0003-3557-2773 NR 14 TC 6 Z9 6 U1 0 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2691 EP 2694 DI 10.1109/TASC.2003.811958 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400064 ER PT J AU Ma, BH Li, MY Koritala, RE Fisher, BL Markowitz, AR Erck, RA Dorris, SE Miller, DJ Balachandran, U AF Ma, BH Li, MY Koritala, RE Fisher, BL Markowitz, AR Erck, RA Dorris, SE Miller, DJ Balachandran, U TI Biaxially aligned template films fabricated by inclined-substrate deposition for YBCO-coated conductor applications SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE biaxial texture; coated conductor; inclined substrate deposition; YBCO thin film ID MGO AB Inclined substrate deposition (ISD) has the potential for rapid production of high-quality biaxially textured buffer layers, which are important for YBCO-coated conductor applications. We have grown biaxially textured MgO films by ISD at deposition rates of 20-100 Angstrom/sec. Columnar grains with a roof-tile surface structure were observed in the ISD-MgO films. X-ray pole figure analysis revealed that the (002) planes of the ISD-MgO films are tilted at an angle from the substrate normal. A small phi-scan full-width at half maximum (FWHM) of approximate to9degrees was observed on MgO films deposited at an inclination angle of 55degrees. In-plane texture in the ISD MgO films developed in the first 0.5 mum from the interface, then stabilized with further increases in film thickness. YBCO films deposited by pulsed laser deposition on ISD-MgO-buffered Hastelloy C276 substrates were biaxially aligned with the c-axis parallel to the substrate normal. T-c of 91 K with a sharp transition and transport J(c) of 5.5 x 10(5) A/cm(2) at 77 K in self-field were measured on a YBCO film that was 0.46-mum thick, 4-mm wide, 10-mm long. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Ma, BH (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Koritala, Rachel/F-1774-2011; Ma, Beihai/I-1674-2013 OI Ma, Beihai/0000-0003-3557-2773 NR 12 TC 9 Z9 9 U1 0 U2 6 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2695 EP 2698 DI 10.1109/TASC.2003.811959 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400065 ER PT J AU Lin, Y Wu, Z Chen, X Huang, DX Chen, XH Hor, R Liu, SW Jacobson, A Chen, CL AF Lin, Y Wu, Z Chen, X Huang, DX Chen, XH Hor, R Liu, SW Jacobson, A Chen, CL TI Epitaxial growth of multilayered YBa2Cu3O7-delta/Y0.7Ca0.3Ba2Cu3O7-delta films for high current application SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE critical current density; multilayered structure; Y0.7Ca0.3Ba2Cu3O7-delta; YBa2Cu3O7-delta ID GRAIN-BOUNDARIES; YBA2CU3O7-DELTA AB Multilayered YBa2Cu3O7-delta (YBCO)/Y0.7Ca0.3Ba2Cu3O7-delta (YCBCO) films were epitaxially grown on (001) LaAlO3 and (001) SrTiO3 by using pulsed laser ablation. Constant-high critical current density (J(c)) of 106 A/cm(2) at 77 K has been achieved with the combination of multilayered YBCO and YCBCO layers for films with various thickness. The critical current density exhibits a high constant value for the multilayered structures indicating that the J(c) in the superconductor films no longer decreases with the increase of the film thickness. The result verifies the model that interfaces can limit the density of dislocations that form in the film during the film growth. The artificial multilayered structures terminate the dislocations and the superconductive films at the optimal J(c) conditions maintain a constant high J(c) at various film thickness. C1 Los Alamos Natl Lab, Los Alamos, NM USA. Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA. Univ Houston, Dept Phys, Houston, TX 77204 USA. Univ Houston, Ctr Mat Chem, Houston, TX 77204 USA. Univ Houston, Dept Chem, Houston, TX 77204 USA. RP Lin, Y (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA. NR 8 TC 1 Z9 2 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2825 EP 2828 DI 10.1109/TASC.2003.812020 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400099 ER PT J AU Soulen, RJ Claassen, JH Osofsky, MS Trotter, G Woods, GT Ovchinnikov, YN Kresen, V Tralshawala, N AF Soulen, RJ Claassen, JH Osofsky, MS Trotter, G Woods, GT Ovchinnikov, YN Kresen, V Tralshawala, N TI Characterization of the interface between a normal metal and a superconductor using magnetic screening SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE interface; magnetic screening; proximity effect; superconductivity AB We have predicted the behavior of magnetic screening of N/I/S trilayers as a function of a single parameter W that parameterizes the discontinuity of the order parameter at the interface. We have compared these calculations with experimental measurements of the temperature (10 K to 1.5 K) dependence of the magnetic screening for several Nb/NbO/Al trilayers and excellent agreement between the predictions and measurements is observed. This agreement provides further understanding of the proximity effect when characterizing the N/S interface in many devices. C1 USN, Res Lab, Washington, DC 20375 USA. Natl Inst Stand & Technol, Opt Tech Div, Gaithersburg, MD 20899 USA. Russian Acad Sci, LD Landau Theoret Phys Inst, Moscow 117333, Russia. Lawrence Berkeley Lab, Berkeley, CA USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. RP Soulen, RJ (reprint author), USN, Res Lab, Washington, DC 20375 USA. RI Osofsky, Michael/A-1050-2010 NR 7 TC 0 Z9 0 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2838 EP 2841 DI 10.1109/TASC.2003.812024 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400102 ER PT J AU Kwon, C Wang, LB Seo, S Park, BH Jia, QX AF Kwon, C Wang, LB Seo, S Park, BH Jia, QX TI Spatial distribution analysis of critical temperature in epitaxial Y-Ba-Cu-O film using variable temperature scanning laser microscopy SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE critical temperature; films; high temperature superconductor; nonuniformity; scanning laser microscope ID JUNCTIONS AB We have investigated the spatial distribution of superconducting transition in an epitaxial YBa2Cu3O7 film using variable temperature scanning laser microscope (VTSLM). VTSLM creates an image of the ac voltage response, deltaV(x, y) due to an ac modulated laser beam, which is proportional to dRdT(x, y). In the resistive transition region, there is a strong correlation between the VTSLM images and the resistance of the sample. When the sample is making a poor thermal contact to the heat bath, the large deltaV(x, y) region shifts toward the ends of the bridge while the sample resistance decreases. This result is due to the variation of surface temperature along the sample created by the heating at the contact resistance and/or the poor thermal contact between the sample and the heat bath. However, even after improving thermal contact, we still observe the distribution of superconducting transition. Since the local superconducting transition occurs within 1 K, we conclude that any samples with superconducting transition width larger than 1 K have local nominiformity. C1 Calif State Univ Long Beach, Dept Phys & Astron, Long Beach, CA 90840 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Kwon, C (reprint author), Calif State Univ Long Beach, Dept Phys & Astron, Long Beach, CA 90840 USA. RI Kwon, Chuhee/A-8687-2008; Park, Bae Ho/D-4840-2011; Jia, Q. X./C-5194-2008 NR 9 TC 5 Z9 5 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2894 EP 2896 DI 10.1109/TASC.2003.812038 PN 3 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400117 ER PT J AU Yuan, Y Jiang, J Cai, XY Patnaik, S Polyanskii, AA Hellstrom, EE Larbalestier, DC Williams, RK Huang, Y AF Yuan, Y Jiang, J Cai, XY Patnaik, S Polyanskii, AA Hellstrom, EE Larbalestier, DC Williams, RK Huang, Y TI Microstructure and J(c) improvements in overpressure processed Ag-sheathed Bi-2223 tapes SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE Bi-2223; critical current density; overpressure processing; porosity ID CRITICAL-CURRENT-DENSITY; PRESSURE; (BI AB Overpressure (OP) processing influences the microstructure and critical current density (J(c)) of Ag sheathed Bi-2223 tapes. SEM and mass density measurements show higher core density and fewer micro-cracks in OP tape than in 1 atm tape. The self-field critical current density, J(c) (0 T, 77 K) in multifilamentary tapes was increased from 33.5 kA/cm(2) with 1 atm processing (1 atm IR) to 48 kA/cm(2) with OP processing (OP pressure = 148 atm) After the first heat treatment (OP HT1), and to 58.7 kA/cm(2) with OP processing after intermediate rolling (OP IR). The corresponding values for J(c) (0.1 T, 77 K) are 12.3 kA/cm(2) (1 atm IR) to 18.2 kA/cm(2) for OP HT1 and to 22.4 kA/cm(2) for OP IR. C1 Univ Wisconsin, Ctr Appl Superconduct, Madison, WI 53706 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Amer Supercond Corp, Westborough, MA 01581 USA. RP Yuan, Y (reprint author), Univ Wisconsin, Ctr Appl Superconduct, Madison, WI 53706 USA. RI Larbalestier, David/B-2277-2008; Jiang, Jianyi/F-2549-2017 OI Larbalestier, David/0000-0001-7098-7208; Jiang, Jianyi/0000-0002-1094-2013 NR 12 TC 13 Z9 13 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2921 EP 2925 DI 10.1109/TASC.2003.812047 PN 3 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400124 ER PT J AU Young, MA Demko, JA Gouge, MJ Pace, MO Lue, JW Grabovickic, R AF Young, MA Demko, JA Gouge, MJ Pace, MO Lue, JW Grabovickic, R TI Measurements of the performance of BSCCOHTS tape under magnetic fields with a cryocooled test rig SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE cryogenic; dc measurements; high-temperature superconductivity; magnetic fields AB The use of high-temperature superconducting (HTS) materials for electric power applications is being realized in prototype systems. A test rig was designed and fabricated that uses a 6-T cryocooled magnet with an 20.3 cm warm bore. Inserted in the bore is a stainless steel vacuum vessel that has a Cryomech GB37 cryocooler to conductively cool the sample. Critical current measurements were made on BSCCO-2223 tapes under externally applied perpendicular and parallel magnetic fields. A description of the test rig design and results from a series of measurements will be presented. C1 Univ Tennessee, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Young, MA (reprint author), Univ Tennessee, Knoxville, TN 37996 USA. NR 4 TC 20 Z9 21 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 2964 EP 2967 DI 10.1109/TASC.2003.812076 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400135 ER PT J AU Huang, YB Cai, XY Holesinger, T Maroni, VA Yu, D Parrella, R Rupich, M Hellstrom, E Teplitsky, M Venkataraman, K Otto, A Larbalestier, D AF Huang, YB Cai, XY Holesinger, T Maroni, VA Yu, D Parrella, R Rupich, M Hellstrom, E Teplitsky, M Venkataraman, K Otto, A Larbalestier, D TI Improving the critical current density in Bi-2223 wires via a reduction of the secondary phase content SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE Bi-2223 tape; critical current density; high temperature superconductor; microstructure analysis ID SILVER-SHEATHED TAPES; PERFORMANCE; BOUNDARIES; (BI AB Progress in the performance of multifilamentary composite Bi-2223 wire fabricated at American Superconductor is reviewed. Critical current (I-c) performance of 175 A at 77 K and self-field and critical current density (J(c)) performance of 21.1 kA/cm(2) (77 K, 0.1 T perpendicular to the tape plane) have been measured for short samples of Bi-2223 wire (standard size is 0.21 x 4.0 x 100 mm). Microstructure analysis by SQUID magnetomtry, transmission XRD and TEM shows a large amount of residual 2211 intergrowth remaining in Bi-2223 grains. Residual 2212 intergrowth is seen to correlate with self-field J(c) at 77 K across a range of experimental samples, suggesting that higher levels,of performance will be achieved by further reducing residual 2212. C1 Amer Supercond, Westborough, MA 01581 USA. Univ Wisconsin, Ctr Appl Supercond, Madison, WI 53706 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Huang, YB (reprint author), Amer Supercond, Westborough, MA 01581 USA. RI Larbalestier, David/B-2277-2008 OI Larbalestier, David/0000-0001-7098-7208 NR 9 TC 5 Z9 5 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3038 EP 3041 DI 10.1109/TASC.2003.812067 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400153 ER PT J AU Meng, RL Lorenz, B Cmaidalka, J Wang, YS Sun, YY Lenzi, J Meen, JK Xue, YY Chu, CW AF Meng, RL Lorenz, B Cmaidalka, J Wang, YS Sun, YY Lenzi, J Meen, JK Xue, YY Chu, CW TI Study of intermetallic compounds isostructural to MgB2 SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE intermetallic compounds; lattice parameters; superconducting materials; valence electron density ID MAGNESIUM DIBORIDE; SUPERCONDUCTIVITY; BORON AB The small intergrain effect of MgB2 on supercurrent makes it one of the most promising candidates for superconducting conductors due to its easier processing and the associated lower manufacturing cost. Unfortunately, the superconducting transition temperature T-c is only 40 K. However, band-structure calculations predict that a higher T-c than that of MgB2 is possible for isostructural and isovalent intermetallic compounds with greater lattice parameters or greater. unit cell volumes. The prediction appears to be consistent with the negative pressure effect on T-c observed. The substitution of the larger Ca-ions for the smaller Mg-ions has thus been suggested to raise T-c, but not yet realized. Alternatively, we have synthesized and studied a series of binary and pseudobinary intermetallic compounds, AGa(2), AGa(2-x)Si(x), and AAl(2-x)Si(x), where A = Ca, Sr, or Ba, which are isostructural to MgB2 and have greater lattice parameters than MgB2. In spite of the greater lattice parameters, AGa(2) are not superconducting. However, all pseudobinary compounds AGa(2-x)Si(x) and AAl(2-x)Si(x) for 0.6 < x < 1.5 are superconducting. Superconductivity is reported for the first time in SrAlSi, with T-c of 5.1 K. Although T-c varies with x in a similar fashion for all members of the series, no specific correlation between T-c and lattice parameters or ionic mass is observed. The maximum T-c of these compound series with different A's varies between 5.5 and 7.8 K, much lower than that of MgB2. The results strongly suggest the unique role of B in the superconductivity of C32 intermetallic compounds. They also demonstrate that factors additional to the lattice parameters and densities of states must play an important role, and that the rigid-band model is not sufficient to account for the observations. C1 Univ Houston, Dept Phys, Houston, TX 77204 USA. Univ Houston, Texas Ctr Supercond, Houston, TX 77204 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China. RP Meng, RL (reprint author), Univ Houston, Dept Phys, Houston, TX 77204 USA. NR 11 TC 11 Z9 11 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3042 EP 3046 DI 10.1109/TASC.2003.812071 PN 3 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400154 ER PT J AU Li, Q Wu, L Zhu, Y Moodenbaugh, AR Gu, GD Suenaga, M Ye, ZX Fischer, DA AF Li, Q Wu, L Zhu, Y Moodenbaugh, AR Gu, GD Suenaga, M Ye, ZX Fischer, DA TI Comparative studies of MgB(2)/Mg nano-composites and press-sintered MgB(2) pellets SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TX SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperConductiv Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Superconductiv, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Superconductiv & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE critical current; grain boundary; MgB(2) superconductors; nano-composites ID BI2SR2CACU2O8+DELTA BICRYSTALS; THIN-FILMS AB We present our studies of superconducting and microstructural properties of bulk MgB(2)/Mg nano-composites and press-sintered MgB(2). TEM investigation revealed that the composites are very dense, consisting of nano-sized MgB(2) grains connected by the well-defined clean grain boundaries (GB). Both amorphous and structural intact GB's were observed in the press-sintered. samples. Magnetization and transport measurements, showed that the composite carried over 1 MA/cm(2) critical current density (J(c)) at 5 K and self-field, while the pressed sintered MgB(2) has J(c) similar to 0.25 MA/cm(2) at 5 K and self-field. The origin of substantially higher J(c) found in the composites is mostly due to their nano-sized grains and clean grain boundaries. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. NIST, Gaithersburg, MD 20899 USA. RP Li, Q (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM qiangli@bnl.gov NR 13 TC 10 Z9 10 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3051 EP 3055 DI 10.1109/TASC.2003.812070 PN 3 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400156 ER PT J AU Serquis, A Liao, XZ Civale, L Zhu, YT Coulter, JY Peterson, DE Mueller, FM AF Serquis, A Liao, XZ Civale, L Zhu, YT Coulter, JY Peterson, DE Mueller, FM TI The influence of structural defects on intra-granular critical currents of bulk MgB2 SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TX SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperConductiv Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Superconductiv, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Superconductiv & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE critical current; magnetic analysis; materials processing; superconducting materials ID SUPERCONDUCTING PROPERTIES AB Bulk MgB2 samples were prepared under different synthesis conditions and analyzed by scanning and transmission electron microscopy. The critical current densities were determined from the magnetization versus magnetic field curves of bulk and powder-dispersed-in-epoxy samples. Results show that through a slow cooling process, the oxygen dissolved in bulk MgB2 at high synthesis temperatures can segregate and form nanometer-sized coherent precipitates Of Mg(B, O)(2) in the MgB2 matrix. Magnetization measurements indicate that these precipitates act as effective flux pinning centers and therefore significantly improve the intra-grain critical current density and its field dependence. C1 Supercond Technol Ctr, Los Alamos Natl Lab, MS K763, Los Alamos, NM 87544 USA. RP Serquis, A (reprint author), Supercond Technol Ctr, Los Alamos Natl Lab, MS K763, Los Alamos, NM 87544 USA. EM aserquis@lanl.gov; xzliao@lanl.gov; lcivale@lanl.gov; yzhu@lanl.gov; jycoulter@lanl.gov; dpeterson@lanl.gov; fmm@lanl.gov RI Zhu, Yuntian/B-3021-2008; Liao, Xiaozhou/B-3168-2009; Serquis, Adriana/L-6554-2015 OI Zhu, Yuntian/0000-0002-5961-7422; Liao, Xiaozhou/0000-0001-8565-1758; Serquis, Adriana/0000-0003-1499-4782 NR 14 TC 4 Z9 4 U1 1 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3068 EP 3071 DI 10.1109/TASC.2003.812093 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400160 ER PT J AU Bhattacharya, RN Chen, J Blaugher, RD AF Bhattacharya, RN Chen, J Blaugher, RD TI Biaxially textured superconductor Bi-oxide films via an electrodeposition process SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE Bi-2212; biaxial texturing; electrodeposition; superconductors ID TAPES AB An electrodeposition process was used to deposit Bi-2212 precursor films. Biaxially textured Bi-2212 superconductor films were prepared from electrodeposited precursor films by melt-quench/melt-growth processing on Ag-coated LAO substrates. Magnetization measurements for-the electrodeposited, Bi-2212 superconductor films show, critical current density values greater than 5 x 10(6) A/cm(2) at 4 K in zero field. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Bhattacharya, RN (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 11 TC 2 Z9 2 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3343 EP 3346 DI 10.1109/TASC.2003.812311 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400233 ER PT J AU Civale, L Serquis, A Hammon, DL Liao, XZ Coulter, JY Zhu, YT Holesinger, T Peterson, DE Mueller, FM AF Civale, L Serquis, A Hammon, DL Liao, XZ Coulter, JY Zhu, YT Holesinger, T Peterson, DE Mueller, FM TI High critical currents in powder in tube MgB2 wires: Influence of microstructure and heat treatments SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE annealing; critical currents; magnetic analysis; materials processing; superconducting cables ID CRITICAL-CURRENT DENSITY; SUPERCONDUCTING PROPERTIES; MAGNESIUM DIBORIDE; FE-CLAD; DEFECTS AB MgB2 wires were produced by the powder-in-tube method, using commercial MgB2 powder with 5% at Mg powder added as an additional source of magnesium, and stainless steel as sheath material. Depending on the parameters of the heat treatments, the dc transport critical current can be increased or decreased by more than one order of magnitude as compared with the as-drawn wire. Analysis of the zero-field-cooling dc magnetization demonstrates that these large variations are due. to changes in the connectivity of the wires. We discuss the optimization of the annealing conditions in terms of the changes in the microstructure, as determined from TEM and SEM analysis. We show that annealing can strongly improve the connectivity by eliminating most of the. micro-cracks present in the un-annealed wires. In contrast, inappropriate annealing conditions result in a deterioration of the connectivity due to the loss of Mg. C1 Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87544 USA. Los Alamos Natl Lab, Mat Technol Met Grp, Los Alamos, NM 87544 USA. RP Civale, L (reprint author), Los Alamos Natl Lab, Superconduct Technol Ctr, MS K763, Los Alamos, NM 87544 USA. RI Zhu, Yuntian/B-3021-2008; Liao, Xiaozhou/B-3168-2009; Serquis, Adriana/L-6554-2015 OI Zhu, Yuntian/0000-0002-5961-7422; Liao, Xiaozhou/0000-0001-8565-1758; Serquis, Adriana/0000-0003-1499-4782 NR 10 TC 6 Z9 6 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3347 EP 3350 DI 10.1109/TASC.2003.812312 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400234 ER PT J AU Barzi, E Mattafirri, S AF Barzi, E Mattafirri, S TI Nb3Sn phase growth and superconducting properties during heat treatment SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang ID STRANDS AB The layer growth and superconducting properties of Nb3Sn are investigated as a function of the heat treatment (HT) duration and temperature for Internal Tin and Powder-in-Tube strands at 650degreesC, 700degreesC and 750degreesC. For all times and temperatures, the Nb3Sn layer thickness is measured, the critical current at 4.2 K is tested as a function of magnetic field, and the upper critical field is obtained through parameterization. Results of the layer critical current density are also shown as a function of HT duration and temperature. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Barzi, E (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 14 TC 9 Z9 10 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3414 EP 3417 DI 10.1109/TASC.2003.812338 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400251 ER PT J AU Mattafirri, S Barzi, E Fineschi, F Rey, JM AF Mattafirri, S Barzi, E Fineschi, F Rey, JM TI Kinetics of phase growth in the Cu-Sn system and. application to composite Nb3Sn strands SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang ID EXTERNAL TIN PROCESS; DIFFUSION AB Nb3Sn is the superconductor most used in the R&D of high field accelerator magnets by either the wind&react or the react&wind technique. In order to program the low temperature steps of the heat treatment, the growth kinetics of Cu-Sn inter-metallics was investigated as a function of duration and temperature. The diffusion constants of eta, epsilon and delta phases between 150degreesC and 550degreesC were evaluated using Cu-Sn model samples. For an accurate data analysis, statistical and systematic errors were determined. Next the behavior of Internal Tin and Modified Jelly Roll Nb3Sn composites was compared with the model predictions. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Pisa, Pisa, Italy. CEA Saclay, F-91191 Gif Sur Yvette, France. RP Mattafirri, S (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 9 TC 12 Z9 13 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3418 EP 3421 DI 10.1109/TASC.2003.812339 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400252 ER PT J AU Sumption, MD Buta, F Tomsic, M Austen, A Gregory, E Rudziak, M Wong, T Motowidlo, L Hascicek, Y Scanlan, RM Higley, H Collings, EW AF Sumption, MD Buta, F Tomsic, M Austen, A Gregory, E Rudziak, M Wong, T Motowidlo, L Hascicek, Y Scanlan, RM Higley, H Collings, EW TI Nb3Al strand processing, transport properties, and cabling SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE J(c); Nb3Al; Rutherford cable; stabilization ID PRECURSOR STRAND; QUENCHING METHOD; CONDUCTORS; WIRES; MICROSTRUCTURES; FIELD AB Nb3Al strands with four different designs have been processed and tested. Strand specifications and some generic aspects of strand fabrication, processing, and testing are described. One strand type was long-length RHQT processed and transport tested at various lengths. Transport J(c) results for short samples and small solenoid coils are presented and discussed for various RHQT protocols. Critical current measurements on various strands have been performed in fields from 18 to 26 T. Various strand stabilization techniques have been investigated including electroplating, plasma spray coating, and direct Nb-Cu high temperature diffusion bonding; these results are described. Fifty meters of strand was RHQT processed and then cabled into a short length of experimental 12-strand Nb3Al Rutherford cable in preparation for transformation (T) and testing. Cabling properties are described. C1 Ohio State Univ, LASM, MSE, Columbus, OH 43210 USA. Hyper Tech Res, Troy, OH 45373 USA. Innovare, Bath, PA 18014 USA. Supercon, Shrewsbury, MA 01545 USA. Florida State Univ, NHMFL, Tallahassee, FL 32306 USA. LBNL, Supercond Magnet Grp, Berkeley, CA 92740 USA. RP Sumption, MD (reprint author), Ohio State Univ, LASM, MSE, Columbus, OH 43210 USA. RI Sumption, Mike/N-5913-2016 OI Sumption, Mike/0000-0002-4243-8380 NR 21 TC 2 Z9 2 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3466 EP 3469 DI 10.1109/TASC.2003.812359 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400264 ER PT J AU Zeitlin, BA Gregory, E Pyon, T Scanlan, RM AF Zeitlin, BA Gregory, E Pyon, T Scanlan, RM TI Continued progress on a low cost high current density Mono Element Internal Tin conductor (MEIT) with integral barriers SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE critical current density; critical field; internal tin; niobium tin; superconductors AB Progress on Mono Element Internal Tin superconductor is presented for four designs with two incorporating integral Nb barriers as opposed to NbTa barriers added later in the fabrication. Processing information is also presented covering the fabrication of these conductors. Sample testing techniques are discussed that gave stable reproducible results to 10 T at current densities of 3767 A/mm(2) (noncopper). Current density as a function of magnetic field-from 10 to 17 T is measured and analyzed with respect to heat treatment and configuration. A value of 2700 A/mm(2) in the noncopper at 12 T was achieved in the best though nonoptimized samples. Kramer plots are also presented that show H* of up to 26 T. Reported "n" values are 33 at 17 T for the highest current density sample. C1 Supergen LLC, Sarasota, FL 34242 USA. Supergen LLC, Jefferson, MA 01522 USA. Outokumpu Adv Superconductors, Waterbury, CT 06704 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Zeitlin, BA (reprint author), Supergen LLC, Sarasota, FL 34242 USA. EM brucezeitlin@comcast.net; ericgregory@charter.net; Tae.Pyon@outokumpu.com; rmscanlan@lbl.gov NR 10 TC 8 Z9 8 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3482 EP 3485 DI 10.1109/TASC.2003.812364 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400268 ER PT J AU Cheggour, N Ekin, JW Clickner, CC Verebelyi, DT Thieme, CLH Feenstra, R Goyal, A Paranthaman, M AF Cheggour, N Ekin, JW Clickner, CC Verebelyi, DT Thieme, CLH Feenstra, R Goyal, A Paranthaman, M TI Transverse compressive stress effect in Y-Ba-Cu-O coatings on biaxially textured Ni and Ni-W substrates SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE coated conductors; critical current density; mechanical properties; microstructure; RABiTS; strain; stress; Y-Ba-Cu-O ID CRITICAL-CURRENT DENSITY; YBA2CU3O7-X THIN-FILMS; GRAIN-BOUNDARIES; SUPERCONDUCTING TAPES; COATED CONDUCTORS; CRITICAL CURRENTS; FIELD; DEPENDENCE; BICRYSTALS; TRANSPORT AB Electromechanical properties of yttrium-barium-copper-oxide (YBCO) coatings on both pure Ni and Ni-5at.%W alloy rolling-assisted, biaxially-textured substrates (RABiTS) were investigated. The effect of transverse compressive stress on transport critical-current densities (J(c)) was measured on samples at 76 K and self magnetic field. Transverse compressive stress can significantly degrade J(c) in YBCO deposited on pure Ni RABiTS unless sufficient frictional support is provided to the sample or the substrate is given a work-hardening treatment. On the other hand, results obtained for YBCO on Ni-5at.%W alloy RABiTS show that the tolerance to transverse stress of these conductors is significantly improved. These electromechanical properties are interpreted with scanning-electron micrographs of the microstructure of the samples after electromechanical testing, as well as stress-strain characteristics measured on RABiTS substrates at 76 K. The tensile yield strength, Young's modulus, and proportional limit of elasticity of candidate RABiTS substrate materials are tabulated and compared. C1 Natl Inst Stand & Technol, Boulder, CO 80305 USA. Amer Supercond Corp, Westerborough, MA 01581 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Cheggour, N (reprint author), Natl Inst Stand & Technol, Boulder, CO 80305 USA. RI Cheggour, Najib/K-2769-2012; Paranthaman, Mariappan/N-3866-2015 OI Cheggour, Najib/0000-0002-0741-3065; Paranthaman, Mariappan/0000-0003-3009-8531 NR 22 TC 19 Z9 19 U1 2 U2 9 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3530 EP 3533 DI 10.1109/TASC.2003.812390 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400280 ER PT J AU Granados, X Sena, S Bartolome, E Palau, A Puig, T Obradors, X Carrera, M Amoros, J Claus, H AF Granados, X Sena, S Bartolome, E Palau, A Puig, T Obradors, X Carrera, M Amoros, J Claus, H TI Characterization of superconducting rings using an in-field Hall probe magnetic mapping system SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE critical currents; hall probes; melt textured superconductors ID CURRENTS AB A Hall probe magnetic imaging system that works in magnetic fields in the range -1 T to 1 T has been implemented, and it has been used to characterize the superconducting behavior of single domain melt textured YBa2Cu3O7 rings. We show that in addition to the analysis of the evolution of the local magnetic field distribution when the external magnetic field is cycled, the hysteretic behavior of the magnetic moment can also be investigated after integration of the local magnetic field. The critical current density has been determined through the critical state model and it has been compared to that calculated by inversion of the Biot-Savart law. A remarkable agreement is achieved with both methods. C1 Inst Ciencia Mat Barcelona, Bellaterra 08193, Spain. Univ Lleida, Dept Medi Ambient & Ciencies Sol, Lleida, Spain. Univ Politecn Catalunya, Dept Matemat Aplicada, Barcelona, Spain. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Granados, X (reprint author), Inst Ciencia Mat Barcelona, Campus UAB, Bellaterra 08193, Spain. RI Obradors, Xavier/A-8146-2012; Palau, Anna/C-2947-2014; Puig, Teresa/O-1077-2013; Amoros, Jaume/G-6071-2015 OI Palau, Anna/0000-0002-2217-164X; Puig, Teresa/0000-0002-1873-0488; Amoros, Jaume/0000-0002-3133-9985 NR 10 TC 18 Z9 18 U1 1 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3667 EP 3670 DI 10.1109/TASC.2003.812426 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400313 ER PT J AU Ye, ZX Li, QA Gu, GD Tu, JJ Kang, WN Choi, EM Kim, HJ Lee, SI AF Ye, ZX Li, QA Gu, GD Tu, JJ Kang, WN Choi, EM Kim, HJ Lee, SI TI Magneto-optical studies of the critical states in c-axis oriented MgB(2) thin-film and bulk MgB(2)/Mg nano-composites SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TX SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperConductiv Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Superconductiv, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Superconductiv & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE critical state; flux jump; magneto-optical; superconductors ID DENDRITIC FLUX PATTERNS AB We present magneto optical (MO) studies of the critical States in a c-axis oriented MgB(2) thin film with a critical current density (J(c)) of 6 MA/cm(2) at 5 K, and bulk MgB(2)/Mg nano-composites with J(c) over 1 MA/cm(2) at 5 K. The magnetic flux penetration and-trapping in the thin film are found remarkably different from that in the bulk samples. A tree-like magnetic flux pattern was observed entering the superconducting film, as well as various complex dendritic flux jumps due to the thermo-magnetic instability. These behaviors indicate the collapse of the critical state of a type II superconductor at local level. In contrast, a regular flux penetration into the critical state was observed in the bulk nano-composites, which indicates that the addition of pure Mg helps to stabilize the critical state. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Pohang Univ Sci & Technol, Dept Phys, Natl Creat Res Initiat Ctr Supercond, Pohang 790784, South Korea. RP Ye, ZX (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM qiangli@bnl.gov NR 9 TC 11 Z9 11 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3722 EP 3725 DI 10.1109/TASC.2003.812526 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400327 ER PT J AU Askew, TR Weber, JM Cha, YS Claus, H Veal, BW AF Askew, TR Weber, JM Cha, YS Claus, H Veal, BW TI Transient response of single-domain Y-Ba-Cu-O rings to pulsed magnetic fields SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT Applied Superconductivity Conference CY AUG 04-09, 2002 CL HOUSTON, TEXAS SP Apple, Argonne Natl Lab, Florida State Univ, Ctr Adv Power Syst, Cingular Wireless, Council SuperCond Amer Competit, Hewlett Packard Co, Houston Adv Res Ctr, IEEE CSC Council Supercond, IISSC, Marimon, Naval Res Lab, Oak Ridge Natl Lab, Univ Houston, Texas Ctr Supercond & Adv Mat, US DOE, Div High Energy Phys, Univ Houston, Cullen Coll Engn, Univ Houston, Coll Nat Sci & Math, Univ Houston, Div Res, Wah Chang DE magnetic diffusion; magnetic shielding; pulsed current testing; scanning Hall probe; single domain YBCO rings ID SUPERCONDUCTOR TUBE AB Shielding current limits and magnetic diffusion chatacteristics have been measured at 77 K for a set of YBCO single-domain rings. These were fabricated from melt-textured cylindrical YBCO monoliths that were densified to nearly 100%, and then oriented from a single seed. The rings were surrounded by a drive coil that can, under pulse conditions, achieve applied magnetic fields in excess of 1 T and induce currents in excess of 50 kA. Simultaneous magnetic characterization With a Rogowski coil and Hall probe was used to determine the induced current in the sample and the magnetic field in the center of the sample. Magnetic fields trapped in the, samples were mapped with a scanning Hall probe. When compared with similar measurements on multidomain c-axis-oriented VBCO rings, the flux penetration is faster and more uniform around the circumference of the ring. The observed critical current density, approximate to 15, 000 A/cm(2) at 77 K, is suitable for application in penetration-type fault current limiters. Separate measurements of the trapped magnetic field And critical current density in the rings are compared with results obtained by analysis of magnetic diffusion characteristics. C1 Argonne Natl Lab, Dept Kalamazoo Coll, Kalamazoo, MI USA. Argonne Natl Lab, Div Energy Technol, Kalamazoo, MI USA. Argonne Natl Lab, Energy Technol Div, Argonne, IL 60439 USA. Argonne Natl Lab, Mat Sci Div, Argonne, IL 60439 USA. RP Askew, TR (reprint author), Argonne Natl Lab, Dept Kalamazoo Coll, Kalamazoo, MI USA. NR 12 TC 4 Z9 4 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 1051-8223 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD JUN PY 2003 VL 13 IS 2 BP 3750 EP 3754 DI 10.1109/TASC.2003.812539 PN 3 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA 702UH UT WOS:000184242400334 ER PT J AU Jun, SC Pearlmutter, BA Nolte, G AF Jun, SC Pearlmutter, BA Nolte, G TI MEG source localization using an MLP with a distributed output representation SO IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING LA English DT Article DE distributed representation; magnetoencephalography; multilayer perceptron; source localization ID MAGNETOENCEPHALOGRAPHY; BRAIN; SYSTEM AB We present a system that takes realistic magnetoencephalographic (MEG) signals and localizes a single dipole to reasonable accuracy in real time. At its heart is a multilayer perceptron (MLP) which takes the sensor measurements as inputs, uses one hidden layer, and generates as outputs the amplitudes of receptive fields holding a distributed representation of the dipole location. We trained this Soft-MLP on dipolar sources with real brain noise and converted the network's output into an explicit Cartesian coordinate representation of the dipole location using two different decoding strategies. The proposed Soft-MLPs are much more accurate than previous networks which output source locations in Cartesian coordinates. Hybrid Soft-MLP-start-LM systems, in which the Soft-MLP output initializes Levenberg-Marquardt, retained their accuracy of 0.28 cm with a decrease in computation time from 36 ins to 30 ms. We apply the Soft-MLP localizer to real MEG data separated by a blind source separation algorithm, and compare the Soft-MLP dipole locations to those of a conventional system. C1 Los Alamos Natl Lab, Biol & Quantum Phys Grp, Los Alamos, NM 87545 USA. NUI Maynooth, Hamilton Inst, Maynooth, Kildare, Ireland. Natl Inst Neurol Disorders & Stroke, Human Motor Control Sect, Med Neurol Branch, NIH, Bethesda, MD 20892 USA. RP Jun, SC (reprint author), Los Alamos Natl Lab, Biol & Quantum Phys Grp, MS-D454, Los Alamos, NM 87545 USA. RI Pearlmutter, Barak/M-8791-2014; OI Pearlmutter, Barak/0000-0003-0521-4553; JUN, SUNG CHAN/0000-0001-5357-4436 NR 13 TC 2 Z9 2 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9294 J9 IEEE T BIO-MED ENG JI IEEE Trans. Biomed. Eng. PD JUN PY 2003 VL 50 IS 6 BP 786 EP 789 DI 10.1109/TBME.2003.812154 PG 4 WC Engineering, Biomedical SC Engineering GA 688BU UT WOS:000183413100016 PM 12814246 ER PT J AU Wong, CNC Graham, S AF Wong, CNC Graham, S TI Investigating the thermal response of a micro-optical shutter SO IEEE TRANSACTIONS ON COMPONENTS AND PACKAGING TECHNOLOGIES LA English DT Article; Proceedings Paper CT 8th Intersociety Conference on Thermal, Mechanical and Thermomechanical Phenomena in Electric Systems CY MAY 30-JUN 01, 2002 CL SAN DIEGO, CA DE contact resistance; MOEMS; thermal conduction; thermal management ID CONDUCTIVITY AB The thermal analysis of a fully integrated microswitch for surety applications will be presented. Specifically, this study focuses on the temperature increase of a micromachined optical shutter with spot heating from a solid-state laser. To analyze the shutter response, a "design-to-analysis" interface has been developed that generates an accurate three-dimensional (3-D) solid geometry from the two-dimensional (2-D) mask layout. By building the "design-to-analysis" interface, engineers can use this solid modeler to virtually prototype and verify a design, and to simulate the performance of micro-devices before fabrication. To determine the effects of thermal conductivity and contact resistance on the thermal response of this passively cooled device, a sensitivity study is also performed. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM ccwong@sandia.gov NR 16 TC 5 Z9 5 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1521-3331 J9 IEEE T COMPON PACK T JI IEEE Trans. Compon. Packaging Technol. PD JUN PY 2003 VL 26 IS 2 BP 324 EP 331 DI 10.1109/TCAPT.2003.815095 PG 8 WC Engineering, Manufacturing; Engineering, Electrical & Electronic; Materials Science, Multidisciplinary SC Engineering; Materials Science GA 734GH UT WOS:000186046300004 ER PT J AU Yang, Q Parvin, B AF Yang, Q Parvin, B TI High-resolution reconstruction of sparse data from dense low-resolution spatio-temporal data SO IEEE TRANSACTIONS ON IMAGE PROCESSING LA English DT Article DE duality; high resolution; interpolation; motion; multigrid methods ID MAXIMUM LIKELIHOOD; OPTICAL-FLOW; IMAGES; SUPERRESOLUTION; DISTRIBUTIONS; RESTORATION; MODELS; NOISY AB A novel approach for reconstruction of sparse high-resolution data from lower-resolution dense spatio-temporal data is introduced. The basic idea is to compute the dense feature velocities from lower-resolution data and project them to the corresponding high-resolution data for computing the missing data. In this context, the basic flow equation is solved for intensity, as opposed to feature velocities at high resolution. Although the proposed technique is generic, we have applied our approach to sea surface temperature (SST) data at 18 km (low-resolution dense data) for computing the feature velocities and at 4 km (high-resolution sparse data) for interpolating the missing data. At low resolution, computation of the flow field is regularized and uses the incompressibility constraints for tracking fluid motion. At high resolution, computation of the intensity is regularized for continuity across multiple frames. C1 Lawrence Berkeley Natl Lab, Imaging & Informat Grp, Computat Res Div, Berkeley, CA 94720 USA. RP Lawrence Berkeley Natl Lab, Imaging & Informat Grp, Computat Res Div, Berkeley, CA 94720 USA. EM qyang@media.lbl.gov NR 18 TC 5 Z9 6 U1 4 U2 5 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1057-7149 EI 1941-0042 J9 IEEE T IMAGE PROCESS JI IEEE Trans. Image Process. PD JUN PY 2003 VL 12 IS 6 BP 671 EP 677 DI 10.1109/TIP.2003.812389 PG 7 WC Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic SC Computer Science; Engineering GA 695HG UT WOS:000183824600007 PM 18237942 ER PT J AU Braudaway, DW AF Braudaway, DW TI The costs of calibration SO IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT LA English DT Article DE ADQ; bits; calibration; scale; uncertainty AB Characterization of the operating parameters of newly developed instruments is met by the several meanings of calibration. In the commonly used form, calibration is used to verify reference values and check the graduations by performing an operational check through the measuring range. This alone can cost an appreciable portion of the sale price of the instrument or circuit board. However, a broad meaning of calibration is to fix the graduations, which requires establishment of the performance characteristics of the device. Equipment to perform the basic calibration may cost over $100 000 while testers to, establish performance run in excess of $1000 000. Costs of such equipment and the time to do the tests are a necessary part of the pricing of each circuit board or instrument made. C1 Sandia Natl Labs, Sandia Pk, NM 87047 USA. RP Braudaway, DW (reprint author), Sandia Natl Labs, Sandia Pk, NM 87047 USA. NR 6 TC 1 Z9 2 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9456 J9 IEEE T INSTRUM MEAS JI IEEE Trans. Instrum. Meas. PD JUN PY 2003 VL 52 IS 3 BP 738 EP 741 DI 10.1109/TIM.2003.814704 PG 4 WC Engineering, Electrical & Electronic; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA 702FD UT WOS:000184213300012 ER PT J AU Smith, MF Majewski, S Weisenberger, AG AF Smith, MF Majewski, S Weisenberger, AG TI Optimizing pinhole and parallel hole collimation for scintimammography with compact pixellated detectors SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article DE collimator; collimator optimization; parallel hole collimator; pinhole collimator; pixellated detector; scintimammography ID MONTE-CARLO SIMULATION; PHOTON TRANSPORT; SPECT; ROTATION; CAMERAS AB The relative resolution and sensitivity advantages of pinhole and parallel hole collimators for planar scintimammography,with compact, pixellated gamma detectors were investigated using analytic models. Collimator design was studied as follows. A desired object resolution was specified for a pixellated detector with a given crystal size and intrinsic spatial resolution and for a given object-to-collimator distance. Using analytic formulas, pinhole and parallel hole collimator parameters were calculated that satisfy this object resolution with optimal geometric sensitivity. An view . Analyses were performed for 15 cm x 20 cm field of detectors with crystal elements 1.0, 2.0, and 10 mm on a side and 140 keV incident photons. The sensitivity for A given object resolution was greater for pinhole collimation at smaller distances, as expected. The object distance at which the pinhole and parallel hole sensitivity curves cross each other is important. The crossover distances increased with larger crystal size for a constant object resolution and increased as the desired object resolution decreased for a constant crystal size. For examples for 4 mm object resolution and a pinhole collimator with focal length 13 cm, these distances were 5.5 cm, 6.5 cm, and 8 cm for the I mm, 2 mm, and 3 mm crystal detectors, respectively. The results suggest a strategy of parallel hole collimation for whole breast imaging and pinhole collimation for imaging focal uptake. This could be accomplished with a dual detector system with a different collimator type on each head or a single head system equipped with two collimators and a rapid switching mechanism. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Smith, MF (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. NR 21 TC 27 Z9 27 U1 0 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD JUN PY 2003 VL 50 IS 3 BP 321 EP 326 DI 10.1109/TNS.2003.812436 PN 2 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA 697GD UT WOS:000183933200002 ER PT J AU Saha, MS Bradley, EL Brewer, P Gleason, KK Kross, B Majewski, S Popov, V Qian, J Ranck, A Smith, K Smith, MF Weisenberger, AG Wojcik, R Welsh, RE AF Saha, MS Bradley, EL Brewer, P Gleason, KK Kross, B Majewski, S Popov, V Qian, J Ranck, A Smith, K Smith, MF Weisenberger, AG Wojcik, R Welsh, RE TI Incorporation of a fluoroscopic X-ray modality in a small animal imaging system SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article DE dual modality; gamma imaging; in vivo imaging; small animal; X-ray fluoroscope ID ULTRA-HIGH-RESOLUTION; COMPUTED-TOMOGRAPHY; THYROID BLOCKING; POTASSIUM-IODIDE; PINHOLE SPECT; GENE; RADIATION; MICE; REGISTRATION; RADIOIODINE AB The authors have developed a multimodality system for imaging the biodistribution of biologically interesting ligands tagged with I-125. By incorporating a small fluoroscope as an additional modality, they have enhanced their small animal nuclear imaging system to include both X-rays and images from two Hamamatsu R3292 5" diameter position sensitive photomultiplier tubes (PSPMT) viewing pixelated scintillators with image co-registration of 1.5 mm or better. Collimators placed between the animal and the scintillators can easily be interchanged and include CuBe parallel-hole collimators with a range of resolution and sensitivity combinations. The small X-ray fluoroscope provides 5 cm diameter images, several of which can readily be combined to provide structural anatomical information from the animal under study. The system has been tested by comparing the uptake of. I (in NaI) in control mice and mice previously fed a solution of KI (potassium iodide) designed specifically to block uptake of the radiolabeled iodine in the thyroid. This system not only provides an effective approach for the analysis of KI dose and toxicity issues but also allows for detection of individual variation in animals, an important issue in contemporary pharmacology and genomics. C1 Coll William & Mary, Dept Biol, Williamsburg, VA 23187 USA. Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23187 USA. Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Saha, MS (reprint author), Coll William & Mary, Dept Biol, Williamsburg, VA 23187 USA. RI Qian, Jianguo/B-3663-2010; OI Brewer, Paul/0000-0002-2715-5286 NR 35 TC 5 Z9 5 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD JUN PY 2003 VL 50 IS 3 BP 333 EP 338 DI 10.1109/TNS.2003.812438 PN 2 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA 697GD UT WOS:000183933200004 ER PT J AU Vaska, P Stoll, SP Woody, CL Schlyer, DJ Shokouhi, S AF Vaska, P Stoll, SP Woody, CL Schlyer, DJ Shokouhi, S TI Effects of intercrystal crosstalk on multielement LSO/APD PET detectors SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article DE biomedical nuclear imaging; gamma-ray detectors; optical crosstalk; positron emission tomography (PET); scintillation detectors ID PERFORMANCE; SCATTER; ARRAYS; MODULE AB One of the most promising high resolution positron emission tomography detector designs comprises an array of small, optically isolated scintillator crystals each coupled to an independent photosensor, such as an avalanche photodiode (APD). However, crosstalk between crystals (due to Compton scatter, photoelectron escape, or incomplete optical isolation) can significantly degrade performance and is expected to increase as crystals become narrower to improve spatial resolution; Various measures of crosstalk have been determined for different configurations of 4 x 8 blocks of 2 mm x 2 mm lutetium oxyorthosilicate (LSO) crystals coupled to matched Hamamatsu APD arrays. Results indicate that ignoring crosstalk signals could lead to a similar to30% loss in coincidence sensitivity for a tomograph using these detectors and a decrease in energy resolution of similar to2 percentage points. Spatial and time resolution would not be significantly affected with most practical front-end architectures. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Vaska, P (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 12 TC 15 Z9 16 U1 0 U2 4 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD JUN PY 2003 VL 50 IS 3 BP 362 EP 366 DI 10.1109/TNS.2003.812452 PN 2 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA 697GD UT WOS:000183933200009 ER PT J AU Huesman, RH Klein, GJ Kimdon, JA Kuo, C Majumdar, S AF Huesman, RH Klein, GJ Kimdon, JA Kuo, C Majumdar, S TI Deformable registration of multimodal data including rigid structures SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article DE elastic; lumbar spine; MRI; multimodality; registration; rigid; X-ray CT ID THIN-PLATE SPLINES; MUTUAL INFORMATION; IMAGE REGISTRATION; DEFORMATIONS; MAXIMIZATION; CT AB Multimodality imaging studies are becoming more widely utilized in the analysis of medical data. Anatomical data from computed tomography (CT) and magnetic resonance imaging (MRI) are useful for, analyzing or further processing functional data from techniques such as positron emission tomography and single photon emission computed tomography (SPECT). When data are not acquired simultaneously, even when these data are acquired on a dual-imaging device using the,same bed, motion can occur that requires registration between the reconstructed image volumes. As the human torso can allow nonrigid motion, this type of motion should be estimated and corrected. The authors report a deformation registration technique that utilizes rigid registration for bony structures while allowing elastic transformation of soft tissue to more accurately register the entire image volume. The technique is applied to the registration of CT and MR images of the lumbar spine. First, a global rigid registration.. is performed to approximately align features. Bony structures aide then segmented from the CT data, using a sentiautomated process, and bounding boxes for each vertebra are established. Each CT subvolume is then individually registered to the MRI data using a piece-wise rigid registration algorithm and a mutual information image similarity measure. The resulting set of rigid transformations allows for accurate registration of the parts of the CT and MRI data representing the vertebrae but not the adjacent soft tissue. To align the soft tissue, a smoothly varying deformation is computed using a thin plate spline (TPS) algorithm. The T S technique requires a sparse set of landmarks that are to be brought into correspondence. These landmarks are automatically obtained from the segmented data using simple edge-detection techniques and random sampling from the edge candidates. A smoothness parameter is also included in the TPS formulation for characterization of the stiffness of the soft tissue. Estimation of an appropriate stiffness factor is obtained iteratively by using the mutual information cost function on the result of the global deformable transformation. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Funct Imaging, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA. Univ Calif San Francisco, Magnet Resonance Sci Ctr, San Francisco, CA 94143 USA. RP Huesman, RH (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Funct Imaging, Berkeley, CA 94720 USA. RI Kuo, Chaincy/H-9475-2016 OI Kuo, Chaincy/0000-0001-7958-8764 NR 8 TC 5 Z9 6 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD JUN PY 2003 VL 50 IS 3 BP 389 EP 392 DI 10.1109/TNS.2003.812443 PN 2 PG 4 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA 697GD UT WOS:000183933200014 ER PT J AU Williams, MB More, MJ Narayanan, D Majewski, S Welch, B Wojcik, R Kieper, DA AF Williams, MB More, MJ Narayanan, D Majewski, S Welch, B Wojcik, R Kieper, DA TI Phantom study of radiotracer concentration quantification in breast scintigraphy SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article DE digital mammography; multimodal imaging; radioactivity quantification; scintimammography; stereotactic imaging ID SCINTIMAMMOGRAPHY; DETECTOR AB The authors are developing a breast imaging system that combines digital X-ray mammography and gamma emission scintigraphy in an integrated unit. One potential value of such a combination is the ability to quickly obtain information about breast shape and lesion position within the breast via X-ray and then to use this information to perform corrections to the gamma image(s). In particular, the effects of gamma ray attenuation, gamma camera resolution, and scatter can be taken into account so as to better estimate the difference between the image contrast and true radioactivity contrast. The authors present results of a phantom study designed to test how well the lesion-to-background contrast can be predicted by this method. The preliminary results indicate that the effects of attenuation, partial volume averaging, and scatter on lesion image contrast can be modeled and suggest that the model might be usefully employed in the dual modality breast scanner to correct the breast scintigram for these effects. C1 Univ Virginia, Charlottesville, VA 22908 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Hampton Univ, Hampton, VA 23668 USA. RP Williams, MB (reprint author), Univ Virginia, Charlottesville, VA 22908 USA. NR 4 TC 9 Z9 9 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD JUN PY 2003 VL 50 IS 3 BP 433 EP 438 DI 10.1109/TNS.2003.812453 PN 2 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA 697GD UT WOS:000183933200021 ER PT J AU Oldham, TR Sexton, FW Srour, JR AF Oldham, TR Sexton, FW Srour, JR TI Introduction to the commemorative special issue SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Editorial Material C1 NASA, Goddard Space Flight Ctr, QSS Grp Inc, Greenbelt, MD 20771 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Northrop Grunmman Space Technol, Redondo Beach, CA 90278 USA. RP Oldham, TR (reprint author), NASA, Goddard Space Flight Ctr, QSS Grp Inc, Code 661, Greenbelt, MD 20771 USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD JUN PY 2003 VL 50 IS 3 BP 454 EP 456 DI 10.1109/TNS.2003.813138 PN 3 PG 3 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA 697GG UT WOS:000183933600001 ER PT J AU Schwank, JR Ferlet-Cavrois, V Shaneyfelt, MR Paillet, P Dodd, PE AF Schwank, JR Ferlet-Cavrois, V Shaneyfelt, MR Paillet, P Dodd, PE TI Radiation effects in SOI technologies SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article DE dose rate effects; radiation effects; silicon-on-insulator (SOI); single event effects; total dose effects ID SIMOX BURIED OXIDES; FULLY-DEPLETED SOI; IMPLANTED OXYGEN OXIDES; ELECTRON-SPIN-RESONANCE; TOTAL-DOSE IRRADIATION; CHARGE COLLECTION; MOS-TRANSISTORS; POROUS SILICON; SIO2 LAYERS; BIPOLAR AMPLIFICATION AB Silicon-on-insulator (SOI) technologies have been developed for radiation-hardened applications for many years and are rapidly becoming a main-stream commercial technology. The authors review the total dose, single-event effects, and dose rate hardness of SOI devices. The total dose response of SOI devices is more complex than for bulk-silicon devices due to the buried oxide. Radiation-induced trapped charge in the buried oxide can increase the leakage current of partially depleted transistors and decrease the threshold voltage and increase the leakage current of fully depleted transistors. Process techniques that reduce the net amount of radiation-induced positive charge trapped in the buried oxide and device design techniques that mitigate the effects of trapped charge in the buried oxide have been developed to harden SOI devices to bulk-silicon device levels. The sensitive volume for charge collection in SOI technologies is much smaller than for bulk-silicon devices potentially making SOI devices much harder to single-event upset (SEU). However, bipolar amplification caused by floating body effects can significantly reduce the SEU hardness of SOI devices. Body ties are used to reduce floating body effects and improve SEU hardness. SOI ICs are completely immune to classic four-layer p-n-p-n single-event latchup; however, floating body effects make SOI ICs susceptible to single-event snapback (single transistor latch). The sensitive volume for dose rate effects is typically two orders of magnitude lower for SOI devices than for bulk-silicon devices. By using body ties to reduce bipolar amplification, much higher dose rate upset levels can be achieved for SOI devices than for bulk-silicon devices. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. CEA, DIF, F-91680 Bruyeres Le Chatel, France. RP Schwank, JR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 95 TC 158 Z9 188 U1 9 U2 39 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD JUN PY 2003 VL 50 IS 3 BP 522 EP 538 DI 10.1109/TNS.2003.812930 PN 3 PG 17 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA 697GG UT WOS:000183933600006 ER PT J AU Dodd, PE Massengill, LW AF Dodd, PE Massengill, LW TI Basic mechanisms and modeling of single-event upset in digital microelectronics SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Review DE charge collection; heavy ion irradiation; radiation effects; radiation hardening; single-event effects; single-event upset; soft errors; terrestrial cosmic rays ID INDUCED SOFT ERRORS; INDUCED CHARGE COLLECTION; MULTIPLE-BIT UPSETS; HIGH-DENSITY SRAMS; SUBMICRON CMOS TECHNOLOGY; RANDOM-ACCESS MEMORIES; NUMERICAL-SIMULATION; INTEGRATED-CIRCUITS; ION TRACKS; DEVICE SIMULATION AB Physical mechanisms responsible for nondestructive single-event effects in digital microelectronics are reviewed, concentrating on silicon MOS devices and integrated circuits. A brief historical overview of single-event effects in space and terrestrial systems is given, and upset mechanisms in dynamic random access memories, static random access memories, and combinational logic are detailed. Techniques for mitigating single-event upset are described, as well as methods for predicting device and circuit single-event response using computer simulations. The impact of technology trends on single-event susceptibility and future areas of concern are explored. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Vanderbilt Univ, Dept Elect Engn & Comp Sci, Nashville, TN 37235 USA. RP Dodd, PE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 176 TC 456 Z9 477 U1 6 U2 68 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD JUN PY 2003 VL 50 IS 3 BP 583 EP 602 DI 10.1109/TNS.2003.813129 PN 3 PG 20 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA 697GG UT WOS:000183933600010 ER PT J AU Sexton, FW AF Sexton, FW TI Destructive single-event effects in semiconductor devices and ICs SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article ID CHANNEL POWER MOSFETS; INDUCED LATCH-UP; LETHAL SEGR FAILURES; THIN GATE OXIDES; HEAVY-IONS; CMOS DEVICES; INTEGRATED-CIRCUITS; DIELECTRIC-BREAKDOWN; ANGULAR-DEPENDENCE; LINEAR DEVICES AB Developments in the field of destructive single-event effects over the last 40 years are reviewed. Single-sevent latchup, single-event burnout, single-event gate rupture, and single-event snap-back are discussed beginning with the first observation of each effect, its phenomenology, and the development of present day understanding of the mechanisms involved. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sexton, FW (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 96 TC 82 Z9 84 U1 1 U2 8 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855 USA SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD JUN PY 2003 VL 50 IS 3 BP 603 EP 621 DI 10.1109/TNS.2003.813137 PN 3 PG 19 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA 697GG UT WOS:000183933600011 ER PT J AU Basak, SC Mills, D Mumtaz, MM Balasubramanian, K AF Basak, SC Mills, D Mumtaz, MM Balasubramanian, K TI Use of topological indices in predicting aryl hydrocarbon receptor binding potency of dibenzofurans: A hierarchical QSAR approach SO INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY LA English DT Article ID MOLECULAR-STRUCTURE; ELECTROTOPOLOGICAL-STATE; GEOMETRIC PARAMETERS; VAPOR-PRESSURE; ACUTE TOXICITY; MUTAGENICITY; REGRESSION; SIMILARITY; NUMBERS; AMINES AB Topostructural (TS) and topochemical (TC) indices, geometrical descriptors, and ab initio (STO-3G) quantum chemical indices have, been employed either alone or hierarchically in the development of quantitative structure-activity relationship (QSAR) models of the aryl hydrocarbon (Ah) receptor binding potency of a set of 34 dibenzofurans. Results show that, for the full set, the TS and TC indices explain most of the variance in the data. The addition of 3-D and quantum chemical indices makes only slight improvement in the predictive capability of QSAR models. C1 Univ Minnesota, Nat Resources Res Inst, Duluth, MN 55811 USA. ATSDR, Div Toxicol, Computat Toxicol Lab, Atlanta, GA 30333 USA. Univ Calif Davis, Dept Appl Sci, Livermore, CA 94550 USA. Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Glenn T Seaborg Ctr, Berkeley, CA 94720 USA. RP Basak, SC (reprint author), Univ Minnesota, Nat Resources Res Inst, 5013 Miller Trunk Highway, Duluth, MN 55811 USA. NR 48 TC 33 Z9 34 U1 0 U2 2 PU NATL INST SCIENCE COMMUNICATION-NISCAIR PI NEW DELHI PA DR K S KRISHNAN MARG, PUSA CAMPUS, NEW DELHI 110 012, INDIA SN 0376-4710 J9 INDIAN J CHEM A JI Indian J. Chem. Sect A-Inorg. Bio-Inorg. Phys. Theor. Anal. Chem. PD JUN PY 2003 VL 42 IS 6 BP 1385 EP 1391 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA 697FT UT WOS:000183932100024 ER PT J AU Mora, L Gadgil, AJ Wurtz, E AF Mora, L Gadgil, AJ Wurtz, E TI Comparing zonal and CFD model predictions of isothermal indoor airflows to experimental data SO INDOOR AIR LA English DT Article DE indoor air; computational fluid dynamics; zonal; airflow; simulation ID SIMULATION; CONVECTION; BUILDINGS; ROOM AB It is inappropriate to use the assumption of instantaneously well-mixed zones to model airflows and pollutant transport in large indoor spaces. We investigate two approaches for describing the details of airflows in large indoor spaces, for accuracy and suitability for integration with multi-zone infiltration models. One approach, called the zonal method, was developed over the last 15 years to provide an improvement over the well-mixed assumption. The second approach is the use of a computational fluid dynamics simulation using a coarse grid model of the large indoor space. We compare velocity predictions from different formulations of zonal methods and coarse-grid k -epsilon computational fluid dynamics (CFD) models, to measurements, in a 2D mechanically ventilated isothermal room. Our results suggest that, when airflow details are required, coarse-grid CFD is a better-suited method to predict airflows in large indoor spaces coupled with complex multi-zone buildings, than are the zonal methods. Based on the comparison of pressure predictions from different models, we offer guidance regarding the coupling of a model of detailed airflow in large spaces to algebraic multi-zone infiltration models. C1 Univ La Rochelle, LEPTAB, F-17042 La Rochelle, France. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Mora, L (reprint author), Univ La Rochelle, LEPTAB, Av Michel CREPEAUX, F-17042 La Rochelle, France. OI Gadgil, Ashok/0000-0002-0357-9455; MORA, Laurent/0000-0001-5610-6101 NR 22 TC 52 Z9 52 U1 1 U2 6 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0905-6947 J9 INDOOR AIR JI Indoor Air PD JUN PY 2003 VL 13 IS 2 BP 77 EP 85 DI 10.1034/j.1600-0668.2003.00160.x PG 9 WC Construction & Building Technology; Engineering, Environmental; Public, Environmental & Occupational Health SC Construction & Building Technology; Engineering; Public, Environmental & Occupational Health GA 680ZW UT WOS:000183010800001 PM 12756000 ER PT J AU Hamann, B Bethel, EW Simon, H Meza, J AF Hamann, B Bethel, EW Simon, H Meza, J TI NERSC "visualization greenbook" future visualization needs of the DOE Computational Science Community hosted at NERSC SO INTERNATIONAL JOURNAL OF HIGH PERFORMANCE COMPUTING APPLICATIONS LA English DT Article AB In this paper we present the findings and recommendations that emerged from a one-day workshop held at Lawrence Berkeley National Laboratory (LBNL) on June 5, 2002, in conjunction with the National Energy Research Scientific Computing (NERSC) User Group (NUG) Meeting. The motivation for this workshop was to solicit direct input from the application science community on the subject of visualization. The workshop speakers and participants included computational scientists from a cross-section of disciplines that use the NERSC facility, as well as visualization researchers from across the country. We asked the workshop contributors how they currently visualize their results, and how they would like to do visualization in the future. We were especially interested in each individual's view of how visualization tools and services could be improved in order to better meet the needs of future computational science projects. The outcome of this workshop is a set of findings and recommendations that are presented in more detail later in this paper, and are briefly summarized here. Scientific visualization is a crucial technological capability that plays an important role in understanding data created by computational science projects as well as experiments. In order to be effective, visualization technology should be easy to use for a non-expert. The term easy to use" encompasses a number of different categories, including a short learning curve, tight integration with computational frameworks, availability on the desktop as well as the fixed visualization facility, tools that are tailored for each specific application domain, and low cost. Current visualization tools fall short in several key areas of capability. Few visualization tools are capable of processing large datasets, such as those commonly generated at NERSC. Better support for parallel visualization tools may prove useful in leveraging large parallel machines as visualization resources. Multivariate visualization - multiple grids, many species, and many dimensions - is needed in order to quickly gain insight into large datasets. Related "drill-down" capabilities, such as the ability to quickly move from macro to micro views (used in "data mining"), would be extremely helpful in understanding data but are missing from most visualization tools. Many application scientists perceive a conundrum when it comes to visualization support. Support for visualization within each individual program level is often inadequate or nonexistent due to funding constraints, yet support for visualization at the institutional level is also often inadequate or nonexistent. Better solutions are needed for remote visualization. Current approaches are further constrained by network bandwidth and access to resources. The proliferation of visualization tools and data formats poses challenges. Researchers must often master many different tools in order to achieve the desired results. Data format conversion is often required when moving between tools. Common data formats and frameworks for visualization tools are needed to reduce duplication of effort and better promote sharing of resources and results. Better communication is needed between the visualization and computational science communities. The computational scientists are often unaware of current trends and practices in the visualization community. By being more aware of the needs of the computational science community, the visualization research programs can be crafted so as to be more responsive to their needs. As a result of the workshop, we have developed a set of recommendations that can be summarized as follows: Establish a coherent program that focuses on remote visualization. A remote visualization program should provide tools and infrastructure that can be used by multiple "virtual teams". Establish mechanisms whereby generally-applicable visualization technology is developed and deployed in a centralized fashion. Develop a research program in interactive visualization with running codes that stresses the integrated design and development of coupled simulation-visualization methods. Establish a research program in the areas of multi-field visualization and multi-dimensional data visualization. Establish a research program in the area of automated data exploration for next generation petascale datasets. Significantly enhance life science data visualization efforts, with particular emphasis upon the relationship with scientific data management. Develop new programs that link visualization with data management and provide support for multi-resolution representations of large datasets, support for simultaneous display of data from disparate sources, support for the ability to generate and display derived values, and the ability to pose queries and display results. C1 Univ Calif Davis, Davis, CA 95616 USA. NERSC, Lawrence Berkeley Natl Lab, Berkeley, CA USA. RP Hamann, B (reprint author), Univ Calif Davis, Davis, CA 95616 USA. OI Meza, Juan/0000-0003-4543-0349 NR 0 TC 7 Z9 7 U1 1 U2 4 PU SAGE PUBLICATIONS LTD PI LONDON PA 6 BONHILL STREET, LONDON EC2A 4PU, ENGLAND SN 1094-3420 J9 INT J HIGH PERFORM C JI Int. J. High Perform. Comput. Appl. PD SUM PY 2003 VL 17 IS 2 BP 97 EP 123 DI 10.1177/1094342003017002001 PG 27 WC Computer Science, Hardware & Architecture; Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods SC Computer Science GA 680HR UT WOS:000182970700001 ER PT J AU Dongarra, J Eijkhout, V AF Dongarra, J Eijkhout, V TI Self-adapting numerical software for next generation applications SO INTERNATIONAL JOURNAL OF HIGH PERFORMANCE COMPUTING APPLICATIONS LA English DT Article AB The challenge for the development of next generation software is the successful management of the complex grid environment while delivering to the scientist the full power of flexible compositions of the available algorithmic alternatives. Self-Adapting Numerical Software (SANS) systems are intended to meet this significant challenge. A SANS system comprises intelligent next generation numerical software that domain scientists - with disparate levels of knowledge of algorithmic and programmatic complexities of the underlying numerical software - can use to easily express and efficiently solve their problem. The components of a SANS system are: A SANS agent with: An intelligent component that automates method selection based on data, algorithm and system attributes. A system component that provides intelligent management of and access to the computational grid. A history database that records relevant information generated by the intelligent component and maintains past performance data of the interaction (e.g., algorithmic, hardware specific, etc.) between SANS components, A simple scripting language that allows a structured multilayered implementation of the SANS while ensuring portability and extensibility of the user interface and underlying libraries. An XML/CCA-based vocabulary of metadata to describe behavioral properties of both data and algorithms. System components, including a runtime adaptive scheduler, and prototype libraries that automate the process of architecture-dependent tuning to optimize performance on different platforms. A SANS system can dramatically improve the ability of computational scientists to model complex, interdisciplinary phenomena with maximum efficiency and a minimum of extra-domain expertise. SANS innovations (and their generalizations) will provide to the scientific and engineering community a dynamic computational environment in which the most effective library components are automatically selected based on the problem characteristics, data attributes, and the state of the grid. C1 Univ Tennessee, Innovat Comp Lab, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Knoxville, TN 37996 USA. RP Dongarra, J (reprint author), Univ Tennessee, Innovat Comp Lab, Knoxville, TN 37996 USA. RI Dongarra, Jack/E-3987-2014 NR 20 TC 13 Z9 13 U1 0 U2 1 PU SAGE PUBLICATIONS LTD PI LONDON PA 6 BONHILL STREET, LONDON EC2A 4PU, ENGLAND SN 1094-3420 J9 INT J HIGH PERFORM C JI Int. J. High Perform. Comput. Appl. PD SUM PY 2003 VL 17 IS 2 BP 125 EP 131 DI 10.1177/1094342003017002002 PG 7 WC Computer Science, Hardware & Architecture; Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods SC Computer Science GA 680HR UT WOS:000182970700002 ER PT J AU Sugantha, M Ramakrishnan, PA Hermann, AM Warmsingh, CP Ginley, DS AF Sugantha, M Ramakrishnan, PA Hermann, AM Warmsingh, CP Ginley, DS TI Nanostructured MnO2 for Li batteries SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY LA English DT Article DE MnO2; Li battery; nanorods; sol-gel ID LITHIUM BATTERIES; NANOMATERIALS; OXIDES; SYSTEM AB Nanorods of manganese (IV) oxide of varying dimensions were synthesized by combining sol-gel chemistry and ternplate-based methods, and have been characterized using XRD, SEM, TEM, EDX, and ICP analysis. Diffraction studies and ICP analysis indicate that the product formed is an alpha-MnO2 polymorph which crystallizes with hollandite-type structure. Preliminary electrochemical studies on 100 nm diameter nanorods show that these materials are promising candidates for positive electrodes in Li-ion batteries. (C) 2002 Published by Elsevier Science Ltd on behalf of the International Association for Hydrogen Energy. C1 Univ Colorado, Dept Phys, Boulder, CO 80309 USA. Natl Renewable Energy Labs, Golden, CO 80401 USA. RP Hermann, AM (reprint author), Colorado Sch Mines, Dept Phys, CB 390, Golden, CO 80401 USA. NR 14 TC 78 Z9 87 U1 5 U2 47 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0360-3199 J9 INT J HYDROGEN ENERG JI Int. J. Hydrog. Energy PD JUN PY 2003 VL 28 IS 6 BP 597 EP 600 AR PII S0360-3199(02)00148-9 DI 10.1016/S0360-3199(02)00148-9 PG 4 WC Chemistry, Physical; Electrochemistry; Energy & Fuels SC Chemistry; Electrochemistry; Energy & Fuels GA 657GR UT WOS:000181658500002 ER PT J AU Elam, CC Padro, CEG Sandrock, G Luzzi, A Lindblad, P Hagen, EF AF Elam, CC Padro, CEG Sandrock, G Luzzi, A Lindblad, P Hagen, EF TI Realizing the hydrogen future: the International Energy Agency's efforts to advance hydrogen energy technologies SO INTERNATIONAL JOURNAL OF HYDROGEN ENERGY LA English DT Article DE hydrogen energy; IEA; hydrogen economy; hydrogen storage AB Hydrogen systems can provide viable, sustainable options for meeting the world's energy requirements. Hydrogen is relevant to all of the energy sectors-transportation, buildings, utilities and-industry. It can provide storage options for baseload (geothermal), seasonal (hydroelectric) and intermittent (PV and wind) renewable resources, and when combined with emerging decarbonization technologies, can reduce the climate impacts of continued fossil fuel utilization. However, hydrogen energy systems still face a number of technical and economical barriers that must first be overcome for hydrogen to become a competitive energy carrier. Advances must be made in hydrogen production, storage, transport and utilization technologies and in the integration of these components into complete energy systems. To expedite the advancement of hydrogen technologies and realize a hydrogen future, nations have come together under the auspices of the International Energy Agency's (IEA) Hydrogen Program to collaborate and address the important barriers that impede hydrogen's worldwide acceptance. Through well-structured, collaborative projects, experts from around the world address many of the technical challenges and long-term research needs that face the hydrogen community. These collaborations have already led to significant advances in renewable hydrogen production and solid storage materials and to the development of tools to evaluate and optimize integrated hydrogen energy systems. (C) 2003 Published by Elsevier Science Ltd on behalf of the International Association for Hydrogen Energy. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Norsk Hydro AS, Oslo, Norway. Uppsala Univ, Uppsala, Sweden. Australian Natl Univ, Canberra, ACT, Australia. SunaTech Inc, Ringwood, NJ USA. RP Elam, CC (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. RI Lindblad, Peter/D-1809-2009 NR 17 TC 141 Z9 146 U1 4 U2 25 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0360-3199 J9 INT J HYDROGEN ENERG JI Int. J. Hydrog. Energy PD JUN PY 2003 VL 28 IS 6 BP 601 EP 607 AR PII S0360-3199(02)00147-7 DI 10.1016/S0360-3199(02)00147-7 PG 7 WC Chemistry, Physical; Electrochemistry; Energy & Fuels SC Chemistry; Electrochemistry; Energy & Fuels GA 657GR UT WOS:000181658500003 ER PT J AU Maris, P Roberts, CD AF Maris, P Roberts, CD TI Dyson-Schwinger equations: A tool for hadron physics SO INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS LA English DT Review DE Bethe-Salpeter equation; confinement; dynamical Chiral symmetry breaking; Dyson-Schwinger equations; electroweak and strong form factors; Faddeev equation; hadron physics; QCD modelling ID ELECTROMAGNETIC FORM-FACTORS; PI-PI-SCATTERING; INCORPORATING CHIRAL-SYMMETRY; MODEL FIELD-THEORY; QUANTUM CHROMODYNAMICS; QUARK-MODEL; PSEUDOSCALAR MESONS; INFRARED BEHAVIOR; CHARGE RADIUS; NJL MODEL AB Dyson-Schwinger equations furnish a Poincare covariant framework within which to study hadrons. A particular feature is the existence of a nonperturbative, symmetry preserving truncation that enables the proof of exact results. The gap equation reveals that dynamical chiral symmetry breaking is tied to the long-range behavior of the strong interaction, which is thereby constrained by observables, and the pion is precisely understood, and seen to exist simultaneously as a Goldstone mode and a bound state of strongly dressed quarks. The systematic error associated with the simplest truncation has been quantified, and it underpins a one-parameter model efficacious in describing an extensive body of mesonic phenomena. Incipient applications to baryons have brought successes and encountered challenges familiar from early studies of mesons, and promise a covariant field theory upon which to base an understanding of contemporary large momentum transfer data. C1 N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Maris, P (reprint author), N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA. OI Roberts, Craig/0000-0002-2937-1361 NR 179 TC 377 Z9 381 U1 1 U2 10 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0218-3013 EI 1793-6608 J9 INT J MOD PHYS E JI Int. J. Mod. Phys. E-Nucl. Phys. PD JUN PY 2003 VL 12 IS 3 BP 297 EP 365 DI 10.1142/S0218301303001326 PG 69 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 707KL UT WOS:000184509800001 ER PT J AU Saito, H Gaertner, G Jones, W Eigenmann, R Iwashita, H Lieberman, R van Waveren, M Whitney, B AF Saito, H Gaertner, G Jones, W Eigenmann, R Iwashita, H Lieberman, R van Waveren, M Whitney, B TI Large system performance of SPEC OMP benchmark suites SO INTERNATIONAL JOURNAL OF PARALLEL PROGRAMMING LA English DT Article; Proceedings Paper CT International Symposium on High Performance Computing CY MAY 15-17, 2002 CL KANSAI, JAPAN DE SPEC OMP; benchmark; high-performance computing; performance evaluation; OpenMP ID PARALLEL AB Performance characteristics of application programs on large-scale systems are often significantly different from those on smaller systems. SPEC OMP includes benchmark suites intended for measuring performance of modern shared memory parallel systems. SPEC OMPM2001 is developed for medium-scale (4- to 16-way) systems whereas SPEC OMPL2001 is developed for large-scale systems (32-way and larger). We present our experiences on benchmark development in achieving good scalability using the OpenMP API. We also analyze the published results of these benchmark suites on large systems (32-way and larger), based on application program behavior and systems' architectural features. C1 Intel Corp, Santa Clara, CA 95052 USA. Hewlett Packard Corp, Palo Alto, CA USA. Natl Renewable Energy Lab, Golden, CO USA. Purdue Univ, W Lafayette, IN 47907 USA. Sun Microsyst Inc, Palo Alto, CA USA. RP Saito, H (reprint author), Intel Corp, SC12-301,3601 Juliette Lane, Santa Clara, CA 95052 USA. RI Iwashita, Hidetoshi/C-4517-2016 OI Iwashita, Hidetoshi/0000-0002-6690-5369 NR 11 TC 2 Z9 2 U1 0 U2 1 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0885-7458 J9 INT J PARALLEL PROG JI Int. J. Parallel Program. PD JUN PY 2003 VL 31 IS 3 BP 197 EP 209 DI 10.1023/A:1023086618401 PG 13 WC Computer Science, Theory & Methods SC Computer Science GA 662JR UT WOS:000181944000003 ER PT J AU Hines, JW Gribok, AV Urmanov, AM Buckner, MA AF Hines, JW Gribok, AV Urmanov, AM Buckner, MA TI Selection of multiple regularization parameters in local ridge regression using evolutionary algorithms and prediction risk optimization SO INVERSE PROBLEMS IN ENGINEERING LA English DT Article; Proceedings Paper CT 4th International Conference on Inverse Problems in Engineering: Theory and Practice_ (4th ICIPE) CY MAY 26-31, 2002 CL RIO JANEIRO, BRAZIL ID PENALIZED LIKELIHOOD; L-CURVE AB This article presents a new methodology for regularizing data-based predictive models. Traditional modeling using regression can produce unrepeatable, unstable, or noisy predictions when the inputs are highly correlated. Ridge regression is a regularization technique commonly used to deal with those problems. In some practical situations, regularization methods using multiple parameters have advantages. The methodology proposed in this article optimizes several local regularization parameters that operate independently on each component. This method allows components with significant predictive power to be passed while components with low predictive power are damped. The optimal combination of regularization parameters are computed using an Evolutionary Strategy search technique with the objective function being a predictive error estimate. Two examples demonstrate this technique's advantages. C1 Univ Tennessee, Dept Nucl Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Engn Sci & Technol Div, Oak Ridge, TN USA. RP Hines, JW (reprint author), Univ Tennessee, Dept Nucl Engn, Knoxville, TN 37996 USA. NR 28 TC 0 Z9 0 U1 0 U2 1 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1068-2767 J9 INVERSE PROBL ENG JI Inverse Probl. Eng. PD JUN PY 2003 VL 11 IS 3 BP 215 EP 227 DI 10.1080/1068276031000095822 PG 13 WC Engineering, Multidisciplinary; Mathematics, Applied SC Engineering; Mathematics GA 690UN UT WOS:000183568800005 ER PT J AU Stacey, P O'Kiely, P Rice, B O'Mara, FP AF Stacey, P O'Kiely, P Rice, B O'Mara, FP TI A note on the on-farm moist grain storage and feeding practices in Ireland SO IRISH JOURNAL OF AGRICULTURAL AND FOOD RESEARCH LA English DT Article DE cereals; conservation; feeding practices; moist grain; storage ID PRODUCTS AB This survey was conducted to identify the grain conservation, storage and feeding practices employed for conserving cereals using new technologies for high moisture grains on Irish farms, and the chemical composition at feedout. The mean moisture concentration at harvesting was 336 g/kg and crops were stored anerobically. Forty-three crops were acid-treated and rolled (i.e. crimped) at ensiling while 12 were treated with urea but not rolled. Grain was stored in horizontal silos with a concrete base and sealed beneath black plastic sheeting. The mean level of supplementation was 4.5 kg moist grain per head daily. Digestive upsets were noted when 12 of the crops were fed. It is concluded that the moist grain systems operated satisfactorily on most farms. C1 TEAGASC, Grange Res Ctr, Dunsany, Meath, Ireland. TEAGASC, Oak Pk Res Ctr, Carlow, Ireland. Univ Coll Dublin, Fac Agr, Dublin 4, Ireland. RP Stacey, P (reprint author), TEAGASC, Grange Res Ctr, Dunsany, Meath, Ireland. NR 4 TC 3 Z9 3 U1 0 U2 2 PU TEAGASC PI DUBLIN PA 19 SANDYMOUNT AVE, DUBLIN 4, IRELAND SN 0791-6833 J9 IRISH J AGR FOOD RES JI Irish J. Agr. Food Res. PD JUN PY 2003 VL 42 IS 1 BP 131 EP 136 PG 6 WC Agriculture, Multidisciplinary; Food Science & Technology SC Agriculture; Food Science & Technology GA 720CM UT WOS:000185244000010 ER PT J AU Rote, DM Johnson, LR AF Rote, DM Johnson, LR TI Maglev ready for prime time SO ISSUES IN SCIENCE AND TECHNOLOGY LA English DT Article C1 Argonne Natl Lab, Transportat Technol R&D Ctr, Argonne, IL 60439 USA. RP Rote, DM (reprint author), Argonne Natl Lab, Transportat Technol R&D Ctr, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0748-5492 J9 ISSUES SCI TECHNOL JI Issues Sci. Technol. PD SUM PY 2003 VL 19 IS 4 BP 26 EP 28 PG 3 WC Engineering, Multidisciplinary; Engineering, Industrial; Multidisciplinary Sciences; Social Issues SC Engineering; Science & Technology - Other Topics; Social Issues GA 702HD UT WOS:000184217700008 ER PT J AU Weinberg, AM AF Weinberg, AM TI New life for nuclear power SO ISSUES IN SCIENCE AND TECHNOLOGY LA English DT Article C1 Oak Ridge Natl Lab, Oak Ridge, TN USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0748-5492 J9 ISSUES SCI TECHNOL JI Issues Sci. Technol. PD SUM PY 2003 VL 19 IS 4 BP 60 EP 62 PG 3 WC Engineering, Multidisciplinary; Engineering, Industrial; Multidisciplinary Sciences; Social Issues SC Engineering; Science & Technology - Other Topics; Social Issues GA 702HD UT WOS:000184217700023 ER PT J AU Panofsky, WKH AF Panofsky, WKH TI Nuclear proliferation risks, new and old SO ISSUES IN SCIENCE AND TECHNOLOGY LA English DT Article C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94305 USA. RP Panofsky, WKH (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94305 USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0748-5492 J9 ISSUES SCI TECHNOL JI Issues Sci. Technol. PD SUM PY 2003 VL 19 IS 4 BP 73 EP 75 PG 3 WC Engineering, Multidisciplinary; Engineering, Industrial; Multidisciplinary Sciences; Social Issues SC Engineering; Science & Technology - Other Topics; Social Issues GA 702HD UT WOS:000184217700028 ER PT J AU David, SA Babu, SS Vitek, JM AF David, SA Babu, SS Vitek, JM TI Welding: Solidification and microstructure SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Article ID AUSTENITIC STAINLESS-STEELS; ELECTRON-BEAM WELDS; LOW-ALLOY STEEL; RAPID SOLIDIFICATION; LASER; PREDICTION; INTERFACE AB Parameters that control the solidification of castings also control the solidification and microstructure of welds. However, various physical processes that occur due to the interaction of the heat source with the metal during welding add a new dimension to the understanding of the weld pool solidification. Conventional theories of solidification over a broad range of conditions can be extended to understand weld pool solidification. In certain cases, because of rapid cooling rate effects, it is not unusual to observe nonequilibrium microstructures. Recent developments in the application of computational thermodynamics and kinetic models, studies on single-crystal welds, and advanced in-situ characterization techniques have led to a better understanding of weld solidification and microstructures. C1 Oak Ridge Natl Lab, Div Met & Ridge, Oak Ridge, TN 37831 USA. RP Oak Ridge Natl Lab, Div Met & Ridge, Bldg 4508,MS 6095, Oak Ridge, TN 37831 USA. EM Davidsa1@ornl.gov RI Babu, Sudarsanam/D-1694-2010 OI Babu, Sudarsanam/0000-0002-3531-2579 NR 59 TC 57 Z9 57 U1 3 U2 40 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD JUN PY 2003 VL 55 IS 6 BP 14 EP 20 DI 10.1007/s11837-003-0134-7 PG 7 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA 689PH UT WOS:000183501800002 ER PT J AU Lambrakos, SG Milewski, JO Moore, PG AF Lambrakos, SG Milewski, JO Moore, PG TI Weld analysis using an inverse-problem approach based on quasi-one-dimensional interpolation SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Article ID GEOMETRIC CONSTRAINTS; NUMERICAL-MODEL; FLOW AB In this article, interpolation properties are examined that are inherent in the physical character of heat-deposition processes such as welding and that are relevant to using an inverse-problem approach for their analysis. This study considers interpolation properties of both parametric and non-parametric representations of the temperature field for heat-deposition processes. In the case of parametric representations of the temperature field. linear combinations of solutions to the heat-conduction equation are adopted as interpolation functions rather than strictly explicit physical-model representations of heat-deposition processes. In the case of non-parametric representations of the temperature field, interpolation procedures that are applicable to discrete representations of the tempera tit re field are adopted. Issues related to parameter optimization and the practical application of methods based on the inverse-problem approach related to interpolation properties are also discussed. C1 USN, Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA. Los Alamos Natl Lab, Div Mat Sci & Technol, Met Grp, Los Alamos, NM 87545 USA. Univ Maryland, Dept Comp Sci, College Pk, MD 20742 USA. RP Lambrakos, SG (reprint author), USN, Res Lab, Div Mat Sci & Technol, Code 6324, Washington, DC 20375 USA. NR 26 TC 1 Z9 1 U1 0 U2 1 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD JUN PY 2003 VL 55 IS 6 BP 27 EP 36 DI 10.1007/s11837-003-0136-5 PG 10 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA 689PH UT WOS:000183501800004 ER PT J AU Vianco, PT Rejent, JA Martin, JJ AF Vianco, PT Rejent, JA Martin, JJ TI The compression stress-strain behavior of Sn-Ag-Cu solder SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Article AB The yield-stress behavior was investigated for the 95.5Sn-4.3Ag-0.20Cu (wt.%), 95.5Sn-3.9Ag-0.6Cu, and 95.5Sn-3.8Ag-0.7Cu ternary lead-free solders using the compression stress-strain test technique. Cylindrical specimens were evaluated in the as-cast or aged (125degreesC, 24 h) condition. The tests were performed at -25degreesC, 25degreesC, 75degreesC, 125degreesC, and 160degreesC using strain rates of 4.2 x 10(-5)s(-1) or 8.3 x 10(-4)s(-1). Specially designed Sn-Ag-0.6Cu samples were fabricated to compare the yield stress of the dendritic microstructure versus that of the equiaxed microstructure that occurs in this alloy. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Vianco, PT (reprint author), Sandia Natl Labs, MS 0889,POB 5800, Albuquerque, NM 87185 USA. NR 12 TC 31 Z9 31 U1 0 U2 3 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD JUN PY 2003 VL 55 IS 6 BP 50 EP 55 DI 10.1007/s11837-003-0141-8 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA 689PH UT WOS:000183501800008 ER PT J AU Aubert, JH AF Aubert, JH TI Thermally removable epoxy adhesives incorporating thermally reversible Diels-Alder adducts SO JOURNAL OF ADHESION LA English DT Article DE epoxy; Diels-Alder; diamine; adhesion; thermally reversible; thermally removable AB Thermally reversible adhesives are prepared through the reaction of aliphatic diamines and a diepoxy compound containing two Diels-Alder adducts. The diepoxy compound is formed via the Diels-Alder reaction between two epoxy-containing furans and a bismaleimide. The adhesive displays a T(g) of -40degreesC and a constant shear modulus up to approximately 90degreesC. At temperatures exceeding 90degreesC the retro Diels-Alder reaction occurs, which leads to a significant loss in modulus. The loss of modulus is reversible with temperature. A thermally reversible adhesive is proposed based upon the loss of modulus at an elevated temperature, i.e., adhesives bonds are easily broken at elevated temperature where the modulus is low. C1 Sandia Natl Labs, Organ Lab Dept, Albuquerque, NM 87185 USA. RP Aubert, JH (reprint author), Sandia Natl Labs, Organ Lab Dept, POB 5800, Albuquerque, NM 87185 USA. EM jhauber@sandia.gov NR 6 TC 30 Z9 30 U1 4 U2 22 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0021-8464 J9 J ADHESION JI J. Adhes. PD JUN PY 2003 VL 79 IS 6 BP 609 EP 616 DI 10.1080/00218460309540 PG 8 WC Engineering, Chemical; Materials Science, Multidisciplinary; Mechanics SC Engineering; Materials Science; Mechanics GA 684AD UT WOS:000183182500006 ER PT J AU Nijhawan, S McMurry, PH Swihart, MT Suh, SM Girshick, SL Campbell, SA Brockmann, JE AF Nijhawan, S McMurry, PH Swihart, MT Suh, SM Girshick, SL Campbell, SA Brockmann, JE TI An experimental and numerical study of particle nucleation and growth during low-pressure thermal decomposition of silane SO JOURNAL OF AEROSOL SCIENCE LA English DT Article ID CHEMICAL-VAPOR-DEPOSITION; GAS-PHASE NUCLEATION; HYDROGENATED SILICON CLUSTERS; H-CL SYSTEM; HOMOGENEOUS NUCLEATION; CONTROLLED DIMENSIONS; AERODYNAMIC LENSES; AEROSOL-PARTICLES; NOZZLE EXPANSIONS; MONOHYDRIDE PHASE AB This paper discusses an experimental and numerical study of the nucleation and growth of particles during low-pressure (similar to1.0 Torr) thermal decomposition of silane (SiH4). A Particle Beam Mass Spectrometer was used to measure particle size distributions in a parallel-plate showerhead-type semiconductor reactor. An aerosol dynamics moment-type formulation coupled with a chemically reacting fluid flow model was used to predict particle concentration, size, and transport in the reactor. Particle nucleation kinetics via a sequence of chemical clustering reactions among silicon hydride molecular clusters, growth by heterogeneous chemical reactions on particle surfaces and coagulation, and transport by convection, diffusion, and thermophoresis were included in the model. The effect of pressure, temperature, flow residence time, carrier gas, and silane concentration were examined under conditions typically used for low-pressure (similar to1 Torr) thermal chemical vapor deposition of polysilicon. The numerical simulations predict that several pathways involving linear and polycyclic silicon hydride molecules result in formation of particle "nuclei," which subsequently grow by heterogeneous reactions on the particle surfaces. The model is in good agreement with observations for the pressure and temperature at which particle formation begins, particle sizes and growth rates, and relative particle concentrations at various process conditions. A simplified, computationally inexpensive, quasi-coupled modeling approach is suggested as an engineering tool for process equipment design and contamination control during low-pressure thermal silicon deposition. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Univ Minnesota, Dept Mech Engn, Minneapolis, MN 55455 USA. Univ Minnesota, Dept Elect Engn, Minneapolis, MN 55455 USA. Sandia Natl Labs, Dept 9114, Albuquerque, NM 87185 USA. RP McMurry, PH (reprint author), Univ Minnesota, Dept Mech Engn, 111 Church St SE, Minneapolis, MN 55455 USA. RI Swihart, Mark/A-3182-2008; McMurry, Peter/A-8245-2008 OI Swihart, Mark/0000-0002-9652-687X; McMurry, Peter/0000-0003-1609-5131 NR 62 TC 31 Z9 31 U1 2 U2 17 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0021-8502 J9 J AEROSOL SCI JI J. Aerosol. Sci. PD JUN PY 2003 VL 34 IS 6 BP 691 EP 711 DI 10.1016/S0021-8502(03)00029-6 PG 21 WC Engineering, Chemical; Engineering, Mechanical; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 691EY UT WOS:000183593300002 ER PT J AU Buzorius, G Rannikb, U Nilsson, ED Vesala, T Kulmala, M AF Buzorius, G Rannikb, U Nilsson, ED Vesala, T Kulmala, M TI Analysis of measurement techniques to determine dry deposition velocities of aerosol particles with diameters less than 100 nm SO JOURNAL OF AEROSOL SCIENCE LA English DT Article ID FOREST; FLUXES; PARAMETERIZATION; GRASS AB Modeled aerosol dry deposition velocities to natural surfaces have not been verified against experimental data because data is not available. However due to recent instrumentation developments measuring vertical number fluxes of aerosols with sizes down to 10 nm became possible. Additional instrument modifications which are discussed here allows measuring size dependent fluxes of 10-100 nm aerosols and would fulfill the data gap. This study analyzes uncertainties in such measurements. Low particle count is identified as a major contributor to the measurement uncertainty, limiting the accurate estimation of size-resolved dry deposition velocities in remote environment to particles with diameters less than 50 nm using current instrumentation. Even in this size range high concentrations are required. In the case of two particle counters with different detection limits dry deposition velocity estimates can be also systematically biased, depending on the aerosol size distribution. A difference in detection limits of counters about 10 nm is narrow enough to avoid bias in size-dependent dry deposition velocities in most circumstances. Published by Elsevier Science Ltd. C1 Brookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USA. Univ Helsinki, Dept Phys Sci, Helsinki, Finland. Univ Stockholm, Dept Meteorol, S-10691 Stockholm, Sweden. RP Buzorius, G (reprint author), Brookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USA. RI Kulmala, Markku/I-7671-2016; Vesala, Timo/C-3795-2017 OI Kulmala, Markku/0000-0003-3464-7825; Vesala, Timo/0000-0002-4852-7464 NR 20 TC 26 Z9 26 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0021-8502 J9 J AEROSOL SCI JI J. Aerosol. Sci. PD JUN PY 2003 VL 34 IS 6 BP 747 EP 764 DI 10.1016/S0021-8502(03)00025-9 PG 18 WC Engineering, Chemical; Engineering, Mechanical; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 691EY UT WOS:000183593300005 ER PT J AU Thiyagarajan, P AF Thiyagarajan, P TI Characterization of materials of industrial importance using small-angle scattering techniques SO JOURNAL OF APPLIED CRYSTALLOGRAPHY LA English DT Article; Proceedings Paper CT 12th International Conference on Small-Angle Scattering CY AUG 25-29, 2002 CL VENICE, ITALY DE SANS; ASAXS; industrial materials; pluronics; phase behaviour; aggregation; third phase formation; metal-extractant complexes; encapsulation of lanthanides and actinides; bulk metallic glasses ID X-RAY-SCATTERING; BLOCK-COPOLYMER SURFACTANTS; NEUTRON-SCATTERING; MICELLAR STRUCTURE; METHANEDIPHOSPHONIC ACID; ELECTROLYTE-SOLUTIONS; POLARIZED NEUTRONS; TRIBLOCK COPOLYMER; METAL-CATIONS; AGGREGATION AB Small angle scattering (SAS) techniques using either X-rays or neutrons are versatile tools for deriving information on the size, morphology and dispersion of colloidal systems in complex materials of industrial importance. The processes such as self-assembly, aggregation, crystallization and phase separation can be studied using SAS techniques at relevant conditions. The difference in the interaction of X-rays and neutrons with matter enables complementary contrast variation studies using SANS and anomalous SAXS (in the presence of metals) on multi-component materials with hierarchical structures. In this paper we present results from small angle scattering studies on a number of systems of industrial importance including, temperature/pressure/shear dependent phase behaviour of pluronics in aqueous media, solution structures of aggregates/polymers of metal-extractant complexes, third phase formation of metal-extractant complexes in organic phase, encapsulation of lanthanides and actinides in porous silica and phase separation and nanocrystallization in bulk metallic glasses. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM thiyaga@anl.gov NR 63 TC 15 Z9 15 U1 1 U2 12 PU INT UNION CRYSTALLOGRAPHY PI CHESTER PA 2 ABBEY SQ, CHESTER, CH1 2HU, ENGLAND SN 1600-5767 J9 J APPL CRYSTALLOGR JI J. Appl. Crystallogr. PD JUN PY 2003 VL 36 IS 1 BP 373 EP 380 DI 10.1107/S0021889803001882 PN 3 PG 8 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 668HN UT WOS:000182284400001 ER PT J AU Desnica, UV Dubcek, P Desnica-Frankovic, ID Buljan, M Bernstorff, S White, CW AF Desnica, UV Dubcek, P Desnica-Frankovic, ID Buljan, M Bernstorff, S White, CW TI Grazing incidence small-angle X-ray scattering studies of the synthesis and growth of CdS quantum dots from constituent atoms in SiO2 matrix SO JOURNAL OF APPLIED CRYSTALLOGRAPHY LA English DT Article; Proceedings Paper CT 12th International Conference on Small-Angle Scattering CY AUG 25-29, 2002 CL VENICE, ITALY DE nanocrystals; quantum dots; X-ray scattering; SAXS; GISAXS; implantation; CdS ID ION-IMPLANTATION; NANOCRYSTALS; SIZE AB Grazing incidence small angle X-ray scattering was applied to study the synthesis and growth of CdS quantum dots (QDs) from Cd and S atoms implanted in SiO2. For a dose of 10(17)/cm(2), the partial synthesis of CdS QDs occurred already during implantation, with only moderate size increase upon subsequent annealing up to T-a = 1073 K. The dynamics of QD synthesis and growth were considerably different for just two times lower dose, where synthesis started only if the implanted samples were annealed at T-a = 773 K or higher, with a strong increase of the size of QDs upon annealing at higher Ta. The results suggest that high-dose implantation followed by low-temperature annealing could lead to better defined sizes and narrower size distributions of QDs. C1 Rudjer Boskovic Inst, HR-10000 Zagreb, Croatia. Sincrotrone Trieste, I-34012 Basovizza, Italy. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Rudjer Boskovic Inst, POB 180, HR-10000 Zagreb, Croatia. EM desnica@rudjer.irb.hr NR 18 TC 6 Z9 6 U1 1 U2 2 PU INT UNION CRYSTALLOGRAPHY PI CHESTER PA 2 ABBEY SQ, CHESTER, CH1 2HU, ENGLAND SN 1600-5767 J9 J APPL CRYSTALLOGR JI J. Appl. Crystallogr. PD JUN PY 2003 VL 36 IS 1 BP 443 EP 446 DI 10.1107/S0021889803000529 PN 3 PG 4 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 668HN UT WOS:000182284400013 ER PT J AU Lo Celso, F Triolo, A Triolo, F Thiyagarajan, P Amenitsch, H Steinhart, M Kriechbaum, M DeSimone, JM Triolo, R AF Lo Celso, F Triolo, A Triolo, F Thiyagarajan, P Amenitsch, H Steinhart, M Kriechbaum, M DeSimone, JM Triolo, R TI A combined small-angle neutron and X-ray scattering study of block copolymers micellisation in supercritical carbon dioxide SO JOURNAL OF APPLIED CRYSTALLOGRAPHY LA English DT Article; Proceedings Paper CT 12th International Conference on Small-Angle Scattering CY AUG 25-29, 2002 CL VENICE, ITALY DE block copolymers; micellization; aggregation ID CRITICAL MICELLIZATION DENSITY; AGGREGATE TRANSITION; CO2; SURFACTANTS; KINETICS AB Small angle neutron and X-ray scattering (SANS and SAXS) are used to investigate the monomer-aggregate transition of fluorocarbon hydrocarbon diblock copolymers in supercritical carbon dioxide. SANS data are analyzed using a polydisperse sphere core-shell model. Synchrotron SAXS data have been collected by profiling the pressure at different temperatures, and critical micellization densities have been obtained for a series of diblock solutions. Finally pressure jump experiments, combined with synchrotron SAXS, have revealed two steps in the dynamics of the formation of the aggregates. C1 Univ Palermo, Dipartimento Chim Fis F Accascina, I-90128 Palermo, Italy. CNR, IPCF, Messina, Italy. Mt Sinai Sch Med, New York, NY USA. ANL, IPNS, Argonne, IL USA. Sincrotrone Elettra, Trieste, Italy. Acad Sci Czech Republ, Inst Macromol Chem, Prague, Czech Republic. Austrian Acad Sci, Inst Biophys & Xray Struct Res, Graz, Austria. UNC, Chapel Hill, NC USA. RP Lo Celso, F (reprint author), Univ Palermo, Dipartimento Chim Fis F Accascina, Viale Sci, I-90128 Palermo, Italy. RI Triolo, Alessandro/A-4431-2012; Steinhart, Milos/H-6968-2014; Triolo, Alessandro/B-7760-2008; Lo Celso, Fabrizio/B-7554-2012; OI Triolo, Alessandro/0000-0003-4074-0743; Kriechbaum, Manfred/0000-0002-3852-4198; Amenitsch, Heinz/0000-0002-0788-1336 NR 17 TC 7 Z9 7 U1 0 U2 6 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0021-8898 J9 J APPL CRYSTALLOGR JI J. Appl. Crystallogr. PD JUN PY 2003 VL 36 SI 1 BP 660 EP 663 DI 10.1107/S0021889803003959 PN 3 PG 4 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 668HN UT WOS:000182284400060 ER PT J AU Carpenter, JM Agamalian, M Littrell, KC Thiyagarajan, P Rehm, C AF Carpenter, JM Agamalian, M Littrell, KC Thiyagarajan, P Rehm, C TI Time-of-flight implementation of an ultrasmall-angle neutron scattering instrument SO JOURNAL OF APPLIED CRYSTALLOGRAPHY LA English DT Article; Proceedings Paper CT 12th International Conference on Small-Angle Scattering CY AUG 25-29, 2002 CL VENICE, ITALY DE Bonse-Hart technique; ultra-small-angle neutron scattering; time-of-flight; pulsed neutron sources AB We report calculations describing the Bonse-Hart ultra-small-angle neutron scattering (USANS) instrument with triple-bounce Si channel-cut crystals, which show that significant gains in Q-resolution and neutron flux can be achieved using multiple high-order Bragg reflections. These reflections become usable only after combining the Bonse-Hart and time-of-flight (t-o-f) techniques, thus this variant of the USANS camera needs a pulsed neutron source. We demonstrate that t-o-f USANS instruments installed, for example, at the SNS water moderator will improve the current state of the art. Through the use of multiple wavelengths, these will provide means to detect multiple scattering effects. C1 Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA. Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA. RP Agamalian, M (reprint author), Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA. RI Littrell, Kenneth/D-2106-2013; OI Littrell, Kenneth/0000-0003-2308-8618; Agamalian, Michael/0000-0002-9112-2534 NR 7 TC 14 Z9 14 U1 0 U2 3 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0021-8898 J9 J APPL CRYSTALLOGR JI J. Appl. Crystallogr. PD JUN PY 2003 VL 36 SI 1 BP 763 EP 768 DI 10.1107/S0021889803003960 PN 3 PG 6 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 668HN UT WOS:000182284400082 ER PT J AU Adachi, T Ikeda, K Oku, T Sakai, K Suzuki, S Suzuki, J Shimizu, HM Littrell, KC Loong, CK Lin, W Guo, J Mitsuishi, N Morita, S Ohmori, H AF Adachi, T Ikeda, K Oku, T Sakai, K Suzuki, S Suzuki, J Shimizu, HM Littrell, KC Loong, CK Lin, W Guo, J Mitsuishi, N Morita, S Ohmori, H TI Recent progress in the development of concave Fresnel lenses for neutrons SO JOURNAL OF APPLIED CRYSTALLOGRAPHY LA English DT Article; Proceedings Paper CT 12th International Conference on Small-Angle Scattering CY AUG 25-29, 2002 CL VENICE, ITALY DE Fresnel lens; neutron lens; focusing neutrons ID REFRACTIVE OPTICS AB The performance of a Fresnel-type compound refractive lens for focusing cold neutrons was evaluated. The lens consists of 44 pieces of compound Fresnel-type refractive lenses made of MgF2 single crystals. The intensity profile of the diffracted neutrons measured over the wavelengths of 9-14 Angstrom was compared with the results of numerical simulations. Good neutron transmission of 0.85 for 9 Angstrom neutrons and a focal length of 3.4 m for 16 Angstrom neutrons were achieved. C1 RIKEN, Wako, Saitama 3510198, Japan. Tokyo Inst Technol, Meguro Ku, Tokyo 1528551, Japan. JAERI, Tokai, Ibaraki 3191195, Japan. Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA. RP Adachi, T (reprint author), RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan. RI Littrell, Kenneth/D-2106-2013 OI Littrell, Kenneth/0000-0003-2308-8618 NR 4 TC 7 Z9 7 U1 0 U2 3 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0021-8898 J9 J APPL CRYSTALLOGR JI J. Appl. Crystallogr. PD JUN PY 2003 VL 36 SI 1 BP 806 EP 808 DI 10.1107/S0021889803003893 PN 3 PG 3 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 668HN UT WOS:000182284400091 ER PT J AU Sakamoto, N Kiyanagi, Y Sato, S Sagehashi, H Furusaka, M Suzuki, J Littrell, KC Loong, CK Gorin, A Manuilov, I Ryazantsev, A Kuroda, K Sakai, K Tokanai, F Adachi, T Oku, T Ikeda, K Miyasaka, H Suzuki, S Morimoto, K Shimizu, HM AF Sakamoto, N Kiyanagi, Y Sato, S Sagehashi, H Furusaka, M Suzuki, J Littrell, KC Loong, CK Gorin, A Manuilov, I Ryazantsev, A Kuroda, K Sakai, K Tokanai, F Adachi, T Oku, T Ikeda, K Miyasaka, H Suzuki, S Morimoto, K Shimizu, HM TI Development of a high-resolution scintillator-based area detector for neutrons SO JOURNAL OF APPLIED CRYSTALLOGRAPHY LA English DT Article; Proceedings Paper CT 12th International Conference on Small-Angle Scattering CY AUG 25-29, 2002 CL VENICE, ITALY DE two-dimensional neutron detector; high-resolution detector AB We applied a scintillator-based area detector to the neutron time-of-flight method by developing a new electronics system for this detector, which detector consists of a thin plate of ZnS(Ag)+6Li scintillator optically coupled to wavelength shifter. The spatial resolution was about 0.4 mm which is consistent with a fiber width of 0.4 mm. The detection efficiency for thermal neutrons was about 6%. A good-resolution radiographic-image as a function of flight time was obtained. C1 Hokkaido Univ, Sapporo, Hokkaido 0608628, Japan. Natl Lab High Energy Phys, KEK, Tsukuba, Ibaraki 305, Japan. JAERI, Ibaraki 3191195, Japan. Argonne Natl Lab, IPNS, Argonne, IL 60439 USA. Inst High Energy Phys, Protvino, Moscow Region, Russia. Waseda Univ, Adv Res Inst Sci & Engn, Tokyo 1698555, Japan. Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan. Yamagata Univ, Dept Phys, Yamagata 9908560, Japan. RIKEN, Wako, Saitama 3510198, Japan. RP Sakamoto, N (reprint author), Hokkaido Univ, Sapporo, Hokkaido 0608628, Japan. RI Kiyanagi, Yoshiaki/D-7132-2012; Littrell, Kenneth/D-2106-2013 OI Littrell, Kenneth/0000-0003-2308-8618 NR 2 TC 4 Z9 4 U1 0 U2 0 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0021-8898 J9 J APPL CRYSTALLOGR JI J. Appl. Crystallogr. PD JUN PY 2003 VL 36 SI 1 BP 820 EP 825 DI 10.1107/S002188980300390X PN 3 PG 6 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 668HN UT WOS:000182284400096 ER PT J AU Lynn, GW Buchanan, MV Butler, PD Magid, LJ Wignall, GD AF Lynn, GW Buchanan, MV Butler, PD Magid, LJ Wignall, GD TI New high-flux small-angle neutron scattering instrumentation and the center for structural and molecular biology at Oak Ridge National Laboratory SO JOURNAL OF APPLIED CRYSTALLOGRAPHY LA English DT Article; Proceedings Paper CT 12th International Conference on Small-Angle Scattering CY AUG 25-29, 2002 CL VENICE, ITALY DE instrumentation; small-angle neutron scattering AB A number of upgrades are currently being undertaken at the High Flux Isotope Reactor (HFIR), including the installation of a supercritical hydrogen moderator (T similar to 20 K) that will be one of the "brightest" cold sources currently available. It will feed four cold neutron guides (CG1-4), each with new instrumentation. CG2 and CG3 are reserved for two new small-angle neutron scattering (SANS) instruments. A 40 m SANS instrument (SANS1), funded by the Department of Energy (DOE) Office of Basic Energy Sciences and the University of Tennessee, Knoxville is designed for CG2. Our 35 m small-angle neutron scattering facility (SANS2 on CG3) is optimized for the study of biological systems as part of a Center for Structural and Molecular Biology (CSMB), funded by the DOE Office of Biological and Environmental Research. In addition to the new SANS facilities, there will be suite of instruments including a reflectometer and a cold triple-axis spectrometer. Both SANS facilities will have variable wavelength and large area (1m(2)) high count-rate detectors that can translate 45 cm off axis to increase the dynamic Q-range (< 0.001-1 &ANGS;(-1) overall). As the HFIR is one of only two reactors with a core flux > 10(15) neutrons/s/cm(2), the beam intensities (up to 10(7)/s/cm(2)) will be comparable to the best facilities worldwide and this will enhance our ability to collect data from synthetic and biological macromolecules more quickly and study smaller sample quantities. C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Univ Tennessee, Knoxville, TN 37996 USA. RP Lynn, GW (reprint author), Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RI Butler, Paul/D-7368-2011; Buchanan, Michelle/J-1562-2016; OI Buchanan, Michelle/0000-0002-8078-4575; Wignall, George/0000-0002-3876-3244 NR 4 TC 8 Z9 9 U1 0 U2 2 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0021-8898 J9 J APPL CRYSTALLOGR JI J. Appl. Crystallogr. PD JUN PY 2003 VL 36 SI 1 BP 829 EP 831 DI 10.1107/S0021889803000670 PN 3 PG 3 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 668HN UT WOS:000182284400098 ER PT J AU Turner, DD Ackerman, SA Baum, BA Revercomb, HE Yang, P AF Turner, DD Ackerman, SA Baum, BA Revercomb, HE Yang, P TI Cloud phase determination using ground-based AERI observations at SHEBA SO JOURNAL OF APPLIED METEOROLOGY LA English DT Article ID WATER-VAPOR; MU-M; RADIATIVE PROPERTIES; THERMODYNAMIC-PHASE; ATMOSPHERIC FLUXES; OPTICAL-CONSTANTS; LIGHT-SCATTERING; CLIMATE RESEARCH; COOLING RATES; ARCTIC-OCEAN AB A new technique for ascertaining the thermodynamic cloud phase from high-spectral-resolution ground-based infrared measurements made by the Atmospheric Emitted Radiance Interferometer (AERI) is presented. This technique takes advantage of the differences in the index of refraction of ice and water between 11 and 19 mum. The differences in the refractive indices translate into differences in cloud emissivity at the various wavelengths, which are used to determine whether clouds contain only ice particles or only water particles, or are mixed phase. Simulations demonstrate that the algorithm is able to ascertain correctly the cloud phase under most conditions, with the exceptions occurring when the optical depth of the cloud is dominated by liquid water (> 70%). Several examples from the Surface Heat Budget of the Arctic Ocean (SHEBA) experiment are presented, to demonstrate the capability of the algorithm, in which a collocated polarization-sensitive lidar is used to provide insight to the true thermodynamic phase of the clouds. Statistical comparisons with this lidar during the SHEBA campaign demonstrate that the algorithm identifies the cloud as either an ice or mixed-phase cloud approximately 80% of time when a single-layer cloud with an average depolarization above 10% exists that is not opaque to the AERI. For single-layer clouds having depolarization of less than 10%, the algorithm identifies the cloud as a liquid water cloud over 50% of the time. This algorithm was applied to 7 months of data collected during SHEBA, and monthly statistics on the frequency of ice, water, and mixed-phase clouds are presented. C1 Univ Wisconsin, CIMSS, Madison, WI 53706 USA. Pacific NW Natl Lab, Richland, WA USA. NASA, Langley Res Ctr, Hampton, VA 23665 USA. Texas A&M Univ, Dept Atmospher Sci, College Stn, TX USA. RP Turner, DD (reprint author), Univ Wisconsin, CIMSS, 1225 W Dayton St, Madison, WI 53706 USA. EM dturner@ssec.wisc.edu RI Yang, Ping/B-4590-2011; Baum, Bryan/B-7670-2011; Ackerman, Steven/G-1640-2011 OI Baum, Bryan/0000-0002-7193-2767; Ackerman, Steven/0000-0002-4476-0269 NR 40 TC 51 Z9 53 U1 1 U2 2 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0894-8763 J9 J APPL METEOROL JI J. Appl. Meteorol. PD JUN PY 2003 VL 42 IS 6 BP 701 EP 715 DI 10.1175/1520-0450(2003)042<0701:CPDUGA>2.0.CO;2 PG 15 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 683LU UT WOS:000183151500004 ER PT J AU Clements, CB Whiteman, CD Horel, JD AF Clements, CB Whiteman, CD Horel, JD TI Cold-air-pool structure and evolution in a mountain basin: Peter Sinks, Utah SO JOURNAL OF APPLIED METEOROLOGY LA English DT Article ID BOUNDARY-LAYER EVOLUTION; CANYONLAND BASIN; HEAT-BUDGET; FLOWS; WINDS AB The evolution of potential temperature and wind structure during the buildup of nocturnal cold-air pools was investigated during clear, dry, September nights in Utah's Peter Sinks basin, a 1-km-diameter limestone sinkhole that holds the Utah minimum temperature record of -56degreesC. The evolution of cold-pool characteristics depended on the strength of prevailing flows above the basin. On an undisturbed day, a 30degreesC diurnal temperature range and a strong nocturnal potential temperature inversion (22 K in 100 m) were observed in the basin. Initially, downslope flows formed on the basin sidewalls. As a very strong potential temperature jump (17 K) developed at the top of the cold pool, however, the winds died within the basin and over the sidewalls. A persistent turbulent sublayer formed below the jump. Turbulent sensible heat flux on the basin floor became negligible shortly after sunset while the basin atmosphere continued to cool. Temperatures over the slopes, except for a 1-2-m-deep layer, became warmer than over the basin center at the same altitude. Cooling rates for the entire basin near sunset were comparable to the 90 W m(-2) rate of loss of net longwave radiation at the basin floor, but these rates decreased to only a few watts per square meter by sunrise. This paper compares the observed cold-pool buildup in basins with inversion buildup in valleys. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Utah, NOAA, Cooperat Inst Reg Predict, Dept Meteorol, Salt Lake City, UT USA. RP Whiteman, CD (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. NR 20 TC 83 Z9 84 U1 3 U2 16 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0894-8763 J9 J APPL METEOROL JI J. Appl. Meteorol. PD JUN PY 2003 VL 42 IS 6 BP 752 EP 768 DI 10.1175/1520-0450(2003)042<0752:CSAEIA>2.0.CO;2 PG 17 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 683LU UT WOS:000183151500007 ER PT J AU Byon, E Anders, A AF Byon, E Anders, A TI Bias and self-bias of magnetic macroparticle filters for cathodic arc plasmas SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID HIGH-ASPECT-RATIO; VACUUM ARCS; TRANSPORT; DEPOSITION; FIELD; BEAM; METALLIZATION; PROPAGATION; TECHNOLOGY; STRAIGHT AB Curved magnetic,filters are often used for the removal of macroparticles from cathodic arc plasmas. This study addresses the need to further reduce losses and improving plasma throughput. The central figure of merit is the system coefficient kappa defined as a filtered ion current normalized by the plasma-producing arc current. The coefficient kappa is investigated as a function of continuous and pulsed magnetic field operation, magnetic field strength, external electric bias, and arc amplitude. It increases with positive filter bias but saturates at about 15 V. for relatively low magnetic field (similar to 10 mT), whereas stronger magnetic fields lead to higher kappa with saturation at about 25 V. Further increase of positive bias reduces kappa. These findings are true for both pulsed and continuous filters. Bias of pulsed filters has been realized using the voltage drop across a self-bias resistor, eliminating the need for a separate bias circuit. Almost 100 A of filtered copper ions have been obtained in pulsed mode, corresponding to kappaapproximate to0.04. The results are interpreted by a simplified potential trough model. (C) 2003 American Institute of Physics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Korean Inst Machinery & Mat, Surface Engn Dept, Chang Won 641010, South Korea. RP Anders, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM aanders@lbl.gov RI Anders, Andre/B-8580-2009 OI Anders, Andre/0000-0002-5313-6505 NR 36 TC 12 Z9 12 U1 0 U2 5 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 JUN 1 PY 2003 VL 93 IS 11 BP 8890 EP 8897 DI 10.1063/1.1570931 PG 8 WC Physics, Applied SC Physics GA 683JE UT WOS:000183144300009 ER PT J AU Reisman, DB Wolfer, WG Elsholz, A Furnish, MD AF Reisman, DB Wolfer, WG Elsholz, A Furnish, MD TI Isentropic compression of irradiated stainless steel on the Z accelerator SO JOURNAL OF APPLIED PHYSICS LA English DT Article AB We have performed quasi-isentropic compression experiments on radiation-damaged stainless steel. The samples were dynamically loaded by Sandia National Laboratory's Z accelerator with-a ramp compression wave. Sample/window interface velocities were recorded with VISAR. The, velocity histories suggest a sudden volume reduction of the material above 40 kbar caused by the collapse of nanosized voids. This is predicted by a theoretical model of void collapse. based on the emission of vacancy-type dislocations loops. We compare the results of these experiments to hydrodynamic calculations performed using a constitutive model which is derived from the atomistic-void collapse mechanism. (C) 2003 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Reisman, DB (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 15 TC 27 Z9 28 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JUN 1 PY 2003 VL 93 IS 11 BP 8952 EP 8957 DI 10.1063/1.15719.69 PG 6 WC Physics, Applied SC Physics GA 683JE UT WOS:000183144300019 ER PT J AU Bourne, NK Gray, GT AF Bourne, NK Gray, GT TI Equation of state of polytetrafluoroethylene SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID RAPID DEFORMATION-BEHAVIOR; SHOCK-WAVE; POLYMERS; COMPRESSION; STRAIN; TEMPERATURE; COMPOSITES; TEFLON AB The present drive to make munitions as safe as is feasible and to develop predictive models describing their constitutive response; has led to the development and production of,plastic bonded explosives and propellants. There is a range of elastomers used as binder materials with the energetic components. One of these is known as Kel-F-800(TM).(poly-chloro-trifluroethylene) whose structure is in some ways analogous to that of poly-tetrafluoroethylene (PTFE or Teflon). Thus, it is of interest to assess the mechanical behavior of Teflon and to compare the response of five different production Teflon materials, two of which were produced in pedigree form, one as-received product, and two from previous, in-depth literature studies. The equations of state of these variants were quantified by conducting a series of shock impact experiments in which both pressure-particle velocity and shock velocity-particle velocity dependencies were measured. The compressive behavior of Teflon, based upon the results of this study, appears to be independent of the production route and additives introduced. (C) 2003 American Institute of Physics. C1 Cranfield Univ, Royal Mil Coll Sci, Swindon SN6 8LA, Wilts, England. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Bourne, NK (reprint author), Cranfield Univ, Royal Mil Coll Sci, Swindon SN6 8LA, Wilts, England. EM n.k.bourne@rmcs.cranfield.ac.uk RI Bourne, Neil/A-7544-2008 NR 34 TC 28 Z9 29 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 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD JUN 1 PY 2003 VL 93 IS 11 BP 8966 EP 8969 DI 10.1063/1.1561821 PG 4 WC Physics, Applied SC Physics GA 683JE UT WOS:000183144300021 ER PT J AU Seel, SC Thompson, CV AF Seel, SC Thompson, CV TI Tensile stress generation during island coalescence for variable island-substrate contact angle SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID WEBER THIN-FILMS; INTRINSIC STRESS; INTERNAL-STRESS; GOLD-FILMS; SILVER; GROWTH; COPPER; DEPOSITION; EVOLUTION; SURFACE AB During the deposition of films that grow by the Volmer-Weber mechanism, crystallites nucleate as isolated islands, grow larger to impinge with other islands, and eventually coalesce into a continuous film. Tensile stress generation due to grain boundary formation during island coalescence, commonly referred to as island zipping, has been cited as a probable stress generation mechanism in a wide variety of materials, including low- and high-melting point metals, polycrystalline diamond, amorphous semiconductors, and amorphous metallic alloys. For all zipping-based tensile stress models in the literature, with the notable exception of the study, of faceted diamond films [Sheldon et al., J. Appl. Phys. 90, 5097 (2001)], the surface of the islands are assumed to approach the substrate at normal incidence, so that the island-substrate contact angle is 90degrees. We have investigated the importance of the island-substrate contact angle on the tensile stress generated during island coalescence. using finite-element calculations. The equilibrium tensile stress as a function of island-substrate contact angle-and island radius was calculated numerically. For islands of a given size, the equilibrium stress was found to be strongly dependent on the contact angle, with the stress decreasing with decreasing contact angle. The scaling of the equilibrium stress with island radius was also found to depend on the contact angle. These results suggest that for a given material, the coalescence stress associated with grain boundary formation should vary significantly for different substrates, depending on detailed differences in wetting behavior. (C) 2003 American Institute of Physics. C1 MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA. RP Seel, SC (reprint author), Sandia Natl Labs, Surface & Interface Sci Div, POB 5800, Albuquerque, NM 87185 USA. NR 19 TC 33 Z9 33 U1 0 U2 15 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 JUN 1 PY 2003 VL 93 IS 11 BP 9038 EP 9042 DI 10.1063/1.1571964 PG 5 WC Physics, Applied SC Physics GA 683JE UT WOS:000183144300032 ER PT J AU Shohami, E Yatsiv, I Alexandrovich, A Haklai, R Elad-Sfadia, G Grossman, R Biegon, A Kloog, Y AF Shohami, E Yatsiv, I Alexandrovich, A Haklai, R Elad-Sfadia, G Grossman, R Biegon, A Kloog, Y TI The Ras inhibitor S-trans, trans-farnesylthiosalicylic acid exerts long-lasting neuroprotection in a mouse closed head injury model SO JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM LA English DT Article DE traumatic brain injury; Ras; S-trans; trans-farnesylthiosalicylic acid (FTS); NMDA receptors; neuroprotection ID TRAUMATIC BRAIN INJURY; ACTIVATED PROTEIN-KINASE; TRANSCRIPTION FACTOR; NMDA RECEPTORS; MAP KINASE; H-RAS; MICE; PHOSPHORYLATION; PATHWAYS; SUBUNIT AB Traumatic brain injury activates N-methyl-(D)-aspartate receptors (NMDAR) inducing activation of the Ras protein (a key regulator of cell growth, survival, and death) and its effectors. Thus, trauma-induced increase in active Ras-GTP might contribute to traumatic brain injury pathology. Based on this hypothesis, a new concept of neuroprotection is proposed, examined here by investigating the effect of the Ras inhibitor S-trans, trans-farnesylthiosalicylic acid (FTS) in a mouse model of closed head injury (CHI). Mice subjected to CHI were treated systemically 1 h later with FrS (5 mg/kg) or vehicle. After I h, Ras-GTP in the contused hemisphere showed a significant (3.8-fold) increase, which was strongly inhibited by FrS (82% inhibition) or by the NMDA-receptor antagonist MK-801 (53%). Both drugs also decreased active (phosphorylated) extracellular signal-regulated kinase. ITS prevented the CHI-induced reduction in NMDAR binding in cortical, striatal, and hippocampal regions, measured by [H-3]-MK-801 autoradiography, and decreased lesion size by 50%. It also reduced CHI-induced neurologic deficits, indicated by the highly significant (P < 0.0001) 60% increase in extent of recovery. Thus, FTS provided long-term neuroprotection after CHI, rescuing NMDAR binding in the contused hemisphere and profoundly reducing neurologic deficits. These findings suggest that nontoxic Ras inhibitors such as FTS may qualify as neuroprotective drugs. C1 Hebrew Univ Jerusalem, Sch Pharm, Dept Pharmacol, IL-91120 Jerusalem, Israel. Hebrew Univ Jerusalem, Hadassah Med Ctr, Pediat Intens Care Unit, IL-91120 Jerusalem, Israel. Tel Aviv Univ, Dept Neurobiochem, IL-69978 Tel Aviv, Israel. Chaim Sheba Med Ctr, Dept Neurosurg, IL-52621 Tel Hashomer, Israel. Lawrence Berkeley Natl Lab, Dept Funct Imaging, Berkeley, CA USA. RP Shohami, E (reprint author), Hebrew Univ Jerusalem, Sch Pharm, Dept Pharmacol, IL-91120 Jerusalem, Israel. NR 39 TC 21 Z9 22 U1 0 U2 2 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0271-678X J9 J CEREBR BLOOD F MET JI J. Cereb. Blood Flow Metab. PD JUN PY 2003 VL 23 IS 6 BP 728 EP 738 DI 10.1097/01.WCB.0000067704.86573.83 PG 11 WC Endocrinology & Metabolism; Hematology; Neurosciences SC Endocrinology & Metabolism; Hematology; Neurosciences & Neurology GA 689JY UT WOS:000183489900011 PM 12796721 ER PT J AU Bryan, JC Hay, BP Sachleben, RA Eagle, CT Zhang, CG Bonnesen, PV AF Bryan, JC Hay, BP Sachleben, RA Eagle, CT Zhang, CG Bonnesen, PV TI Design, synthesis, and structure of novel cesium receptors SO JOURNAL OF CHEMICAL CRYSTALLOGRAPHY LA English DT Article DE crystal structure; synthesis; conformation; cesium; crown ether; design ID MM3(96) FORCE-FIELD; SELECTIVE LIGANDS; ION SELECTIVITY; RATIONAL DESIGN; CATIONS; CALIX<4>ARENE; STABILITY; RUBIDIUM; CRITERIA; BENZENE AB The podand, bis(2-methoxyphenoxy) m-xylene (1), was designed and synthesized as a potential host for the cesium ion. Its structure was determined by single crystal X-ray diffraction. It crystallizes in P2(1)/c with cell dimensions: a = 8. 5723(7) Angstrom, b = 8.3931(14) Angstrom, c = 25.2879(26) Angstrom, beta = 96.224(9)degrees, and V = 1808.7(4) Angstrom(3). A crown derivative, tribenzo-21-crown-6 ( 2), was also prepared and structurally characterized. It also crystallizes in P2(1)/c with cell dimensions: a = 15.5825(13) Angstrom, b = 15.8648(16) Angstrom, c = 8.8266(7) Angstrom, beta = 95.247(6) degrees, and V = 2172.9(3) Angstrom(3). The structures exhibit hydrogen bonding, and are evaluated in terms of complementarity and preorganization for cesium binding. C1 Univ Wisconsin, Dept Chem, La Crosse, WI 54601 USA. Pacific NW Natl Lab, Richland, WA USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. RP Bryan, JC (reprint author), Univ Wisconsin, Dept Chem, 1725 State St, La Crosse, WI 54601 USA. RI G, Neela/H-3016-2014; Bonnesen, Peter/A-1889-2016 OI Bonnesen, Peter/0000-0002-1397-8281 NR 27 TC 2 Z9 2 U1 0 U2 5 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1074-1542 J9 J CHEM CRYSTALLOGR JI J. Chem. Crystallogr. PD JUN PY 2003 VL 33 IS 5-6 BP 349 EP 355 DI 10.1023/A:1024269812003 PG 7 WC Crystallography; Spectroscopy SC Crystallography; Spectroscopy GA 690NN UT WOS:000183555400004 ER PT J AU Ramirez, LM Axelrod, HL Herron, SR Rupp, B Allen, JP Kantardjieff, KA AF Ramirez, LM Axelrod, HL Herron, SR Rupp, B Allen, JP Kantardjieff, KA TI High resolution crystal structure of ferricytochrome c ' from Rhodobacter sphaeroides SO JOURNAL OF CHEMICAL CRYSTALLOGRAPHY LA English DT Article DE cytochrome c '; heme protein; four helix bundle; Rhodobacter sphaeroides ID AMINO-ACID-SEQUENCES; CYTOCHROME C'; HEME PROTEIN; NITRIC-OXIDE; RHODOSPIRILLUM-MOLISCHIANUM; 3-DIMENSIONAL STRUCTURE; REDOX POTENTIALS; LIGAND-BINDING; CAPSULATUS; REFINEMENT AB Cytochrome c' isolated from Rhodobacter sphaeroides strain R26 (RSCP) crystallizes as a dimer of two identical 14-kDa subunits, in trigonal space group P3(1), with cell parameters a; b = 48.10 Angstrom, c = 115.80 Angstrom. The crystal structure of RSCP has been solved by molecular replacement using cytochrome c' from Rhodobacter capsulatus (PDB ID: 1CPQ) as a search model. To ensure effective phase bias removal, the RSCP model was iteratively built into maps generated by a modified wARP procedure, Shake&wARP. The 1.8 Angstrom model (PDB ID: 1GQA) has been refined to an R = 0.204 and free R = 0.254. Each subunit consists of four antiparallel alpha-helices, with the pentacoordinate heme covalently bound to a C-X-Y-C-H motif near the C-terminus. F14, located on helix A, blocks direct access to what would be the sixth "distal" ligand binding site of the heme. The dimer subunits form a flattened "X" shape, intermediate between the Type 1 and Type 2 cytochromes c'. The presence of the aromatic F14 and a deep channel between helices B and C places RSCP into Group 1 cytochromes c'. Clear electron density has revealed that the amino acid sequences for the cytochrome c' from strains R26 and 2.4.1 are identical. C1 Calif State Univ Fullerton, Dept Chem & Biochem, Fullerton, CA 92834 USA. Calif State Univ Fullerton, WM Keck Fdn Ctr Mol Struct, Fullerton, CA 92834 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. Arizona State Univ, Dept Chem & Biochem, Tempe, AZ USA. RP Kantardjieff, KA (reprint author), Calif State Univ Fullerton, Dept Chem & Biochem, Fullerton, CA 92834 USA. RI G, Neela/H-3016-2014 NR 52 TC 15 Z9 15 U1 0 U2 0 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1074-1542 J9 J CHEM CRYSTALLOGR JI J. Chem. Crystallogr. PD JUN PY 2003 VL 33 IS 5-6 BP 413 EP 424 DI 10.1023/A:1024286215637 PG 12 WC Crystallography; Spectroscopy SC Crystallography; Spectroscopy GA 690NN UT WOS:000183555400012 ER PT J AU Peters, B Liang, WZ Bell, AT Chakraborty, A AF Peters, B Liang, WZ Bell, AT Chakraborty, A TI Biasing a transition state search to locate multiple reaction pathways SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SYSTEMS AB A variety of chemical systems exhibit multiple reaction pathways that adjoin to a common reactant state. In fact, any reaction producing side products or proceeding via a stable intermediate involves a species possessing at least two reaction pathways. Despite improvements in ab initio transition-state search algorithms it remains difficult to detect multiple reaction pathways. Typically, multiple reaction pathways can only be detected by intuitively varying the initial point in the transition-state search trajectory. This reliance on intuition limits the ability to discover new and unexpected chemistry using ab initio methods. This paper proposes a systematic and intuition-free method for biasing a transition-state search to identify multiple reaction pathways originating from a common reactant state. The method allows the successive location of transition states, with each successful search contributing to a cumulative bias potential for the following search. The method is applicable to all psuedo-Newton-Raphson-type transition-state searches. The procedure was tested for a model potential energy surface and for the thermal rearrangement of trans-1,4-dimethylcyclobutene. In the latter case, four reaction pathways were discovered: two exothermic conrotatory ring openings leading to hexadienes, an endothermic methyl migration pathway leading to a carbene, and an exothermic rearrangement leading to 3-methyl-1,4-pentadiene. In accordance with experiment, the calculations predict that the conrotatory pathway leading to trans,trans-2,4-hexadiene is the kinetically dominant pathway. The methodology was also used to compute selectivities for competitive pathways producing trans and cis triflouropentadiene products in the thermal rearrangement of 3-triflouromethyl-cyclobutene. Again, results were in accord with experimental observations. (C) 2003 American Institute of Physics. C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. RP Chakraborty, A (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RI Liang, Wanzhen /F-6879-2010; OI Bell, Alexis/0000-0002-5738-4645 NR 24 TC 17 Z9 17 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUN 1 PY 2003 VL 118 IS 21 BP 9533 EP 9541 DI 10.1063/1.1569906 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 678WQ UT WOS:000182890000010 ER PT J AU Cai, J Prausnitz, JM AF Cai, J Prausnitz, JM TI Density distribution for a self-interacting polymer adsorbed at an oil-water interface SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID CONFORMATION-SPACE RENORMALIZATION; NONUNIFORM POLYATOMIC SYSTEMS; FUNCTIONAL THEORY; OIL/WATER INTERFACE; ADSORPTION; CHAIN; MOLECULES; SURFACES; PROTEIN; FLUIDS AB To obtain the density distribution of a polymer at an oil-water interface, the interaction between a polymer segment and the interface is represented by a symmetric square-well potential or a symmetric delta-well potential. The polymer is modeled as a Gaussian chain with an effective segment-segment interaction that depends on the liquid phase (oil or water). Self-consistent field theory is used to calculate the density distribution of the polymer along a coordinate perpendicular to the interface. If the polymer segment-segment repulsion is strong in one phase and weak in the other, the polymer density distribution is relatively sharp in the first phase and relatively flat in the other. Contrary to what we expect for a polymer in the bulk, a polymer near the interface prefers the phase where the polymer-polymer repulsive interactions are relatively weak. (C) 2003 American Institute of Physics. C1 Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RP Prausnitz, JM (reprint author), Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. NR 33 TC 2 Z9 2 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUN 1 PY 2003 VL 118 IS 21 BP 9802 EP 9808 DI 10.1063/1.1569904 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 678WQ UT WOS:000182890000040 ER PT J AU Melle, S Martin, JE AF Melle, S Martin, JE TI Chain model of a magnetorheological suspension in a rotating field SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID COLLOIDAL SUSPENSIONS; MAGNETIC-FIELDS; MR FLUIDS; DYNAMICS; COMPOSITES; SYSTEMS; HOLES AB We develop an athermal chain model for magnetorheological suspensions in rotating magnetic fields. This model is based on a balance of hydrodynamic and magnetostatic forces and focuses on the mechanical stability of chains. Using a linear approximation of the chain shape, we compute the orientation and size of a critical chain in a rotating magnetic field as a function of the Mason number Mn, which is the ratio of dipolar to hydrodynamic forces between two particles in contact. The critical chain length is found to scale with the inverse square root of Mn, and its orientation relative to the instantaneous field is independent of Mn. The actual nonlinear shape of a chain in a rotating field is then computed self-consistently. Finally, the effect of local fields on the dipolar interaction force is considered, leading to predictions for the chain shape and orientation that depend rather strongly on the magnetic permeability of the particles. A principal finding is the possibility of brittle or ductile chain fracture, depending on the permeability of the particles. Single-chain simulations confirm this prediction, as do experimental measurements. (C) 2003 American Institute of Physics. C1 CSIC, Inst Microelect Madrid, Madrid 28760, Spain. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Melle, S (reprint author), CSIC, Inst Microelect Madrid, Isaac Newton 8 PTM Tres Cantos, Madrid 28760, Spain. RI Microelectronica de Madrid, Instituto de/D-5173-2013; OI Microelectronica de Madrid, Instituto de/0000-0003-4211-9045; Melle, Sonia/0000-0002-9802-6908 NR 19 TC 58 Z9 60 U1 1 U2 23 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUN 1 PY 2003 VL 118 IS 21 BP 9875 EP 9881 DI 10.1063/1.1570817 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 678WQ UT WOS:000182890000049 ER PT J AU Rard, JA Clegg, SL Platford, RF AF Rard, JA Clegg, SL Platford, RF TI Thermodynamics of {zNaCl+(1-z)Na2SO4}(aq) from T = 278.15 K to T = 318.15 K, and representation with an extended ion-interaction (Pitzer) model SO JOURNAL OF CHEMICAL THERMODYNAMICS LA English DT Article DE isopiestic measurements; sodium chloride; sodium sulphate; osmotic coefficient; Pitzer's model ID ELECTROLYTE MIXTURES; SYSTEM NA+-CL--NO3--SO42--H2O; ACTIVITY-COEFFICIENTS; OSMOTIC COEFFICIENTS; HIGH SUPERSATURATION; AQUEOUS-SOLUTIONS; HIGH-TEMPERATURE; HEAT-CAPACITY; 25-DEGREES-C; SOLUBILITIES AB In 1968, R.F. Platford reported the results from extensive isopiestic vapor-pressure measurements for the {zNaCl + (1 - z)Na2SO4} (aq) system at T = 298.15 K, using NaCl(aq) as the isopiestic reference standard [R.F. Platford, J. Chem. Eng. Data 13 (1968) 46-48]. However, only derived quantities were reported, and the experimental isopiestic equilibrium molalities were not given. The complete set of original isopiestic molalities from that study is tabulated in the present report. In addition, published thermodynamic information for this system is reviewed and the isopiestic equilibrium molalities, electromotive force measurements for five different types of electrochemical cells, and enthalpies of mixing from these other studies are critically assessed and recalculated consistently. These combined results are used to evaluate at T = 298.15 K the two mixing parameters of Pitzer's ion-interaction model, (S)theta(Cl, SO4) = (1.236 +/- 0.032(5)) .10(-2) kg . mol(-1) and (Na, Cl, SO4) = (1.808 +/- 0.086) . 10(-3) kg(2). mol(-2), and their temperature derivatives {partial derivative(S)theta(Cl, SO4)/partial derivativeT}(P) = (2.474 +/- 0.460) . 10(-5) kg . mol(-1) . K-1 and {partial derivativepsi(Na, Cl, SO4)/partial derivativeT}(P) = -(6.228 +/- 0.186) . 10(-5) kg(2) . mol(-2) - K-1. Also reported are parameters for an extended ion-interaction model for Na2SO4(aq), valid from T= (273.15 to 323.15) K, that were required for this mixed electrolyte solution analysis. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Lawrence Livermore Natl Lab, Energy & Environm Directorate, Livermore, CA 94550 USA. Univ E Anglia, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England. RP Rard, JA (reprint author), Lawrence Livermore Natl Lab, Energy & Environm Directorate, Livermore, CA 94550 USA. NR 54 TC 23 Z9 24 U1 0 U2 7 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0021-9614 J9 J CHEM THERMODYN JI J. Chem. Thermodyn. PD JUN PY 2003 VL 35 IS 6 BP 967 EP 1008 DI 10.1016/S0021-9614(03)00043-0 PG 42 WC Thermodynamics; Chemistry, Physical SC Thermodynamics; Chemistry GA 687CA UT WOS:000183357200009 ER PT J AU Leung, LR Qian, Y Bian, XD AF Leung, LR Qian, Y Bian, XD TI Hydroclimate of the western United States based on observations and regional climate simulation of 1981-2000. part I: Seasonal statistics SO JOURNAL OF CLIMATE LA English DT Article ID NORTH-AMERICAN MONSOON; SUBGRID OROGRAPHIC PRECIPITATION; PACIFIC-NORTHWEST; MESOSCALE MODEL; VARIABILITY; OSCILLATION; EXTREMES; IMPACTS; BUDGET; STORMS AB The regional climate of the western United States shows clear footprints of interaction between atmospheric circulation and orography. The unique features of this diverse climate regime challenges climate modeling. This paper provides detailed analyses of observations and regional climate simulations to improve our understanding and modeling of the climate of this region. The primary data used in this study are the 1/8degrees gridded temperature and precipitation based on station observations and the NCEP - NCAR global reanalyses. These data were used to evaluate a 20-yr regional climate simulation performed using the fifth-generation Pennsylvania State University - National Center for Atmospheric Research (Penn State - NCAR) Mesoscale Model (MM5) driven by large-scale conditions of the NCEP - NCAR reanalyses. Regional climate features examined include seasonal mean and extreme precipitation; distribution of precipitation rates; and precipitation intensity, frequency, and seasonality. The relationships between precipitation and surface temperature are also analyzed as a means to evaluate how well regional climate simulations can be used to simulate surface hydrology, and relationships between precipitation and elevation are analyzed as diagnostics of the impacts of surface topography and spatial resolution. The latter was performed at five east - west transects that cut across various topographic features in the western United States. These analyses suggest that the regional simulation realistically captures many regional climate features. The simulated seasonal mean and extreme precipitation are comparable to observations. The regional simulation produces precipitation over a wide range of precipitation rates comparable to observations. Obvious biases in the simulation include the oversimulation of precipitation in the basins and intermountain West during the cold season, and the undersimulation in the Southwest in the warm season. There is a tendency of reduced precipitation frequency rather than intensity in the simulation during the summer in the Northwest and Southwest, which leads to the insufficient summer mean precipitation in those areas. Because of the general warm biases in the simulation, there is also a tendency for more precipitation events to be associated with warmer temperatures, which can affect the simulation of snowpack and runoff. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Leung, LR (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999, Richland, WA 99352 USA. RI qian, yun/A-5056-2010; qian, yun/E-1845-2011 NR 35 TC 105 Z9 110 U1 0 U2 14 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0894-8755 J9 J CLIMATE JI J. Clim. PD JUN PY 2003 VL 16 IS 12 BP 1892 EP 1911 DI 10.1175/1520-0442(2003)016<1892:HOTWUS>2.0.CO;2 PG 20 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 688WK UT WOS:000183460100002 ER PT J AU Leung, LR Qian, Y Bian, XD Hunt, A AF Leung, LR Qian, Y Bian, XD Hunt, A TI Hydroclimate of the western United States based on observations and regional climate simulation of 1981-2000. part II: Mesoscale ENSO anomalies SO JOURNAL OF CLIMATE LA English DT Article ID SURFACE CLIMATE; NORTH-AMERICA; PRECIPITATION; MODEL; VARIABILITY; TEMPERATURE; PREDICTION; CALIFORNIA; PREDICTABILITY; STREAMFLOW AB The hydroclimate of the western United States is influenced by strong interannual variability of atmospheric circulation, much of which is associated with the El Nino-Southern Oscillation (ENSO). Precipitation anomalies during ENSO often show opposite and spatially coherent dry and wet patterns in the Northwest and California or vice versa. The role of orography in establishing mesoscale ENSO anomalies in the western United States is examined based on observed precipitation and temperature data at 1/8degrees spatial resolution and a regional climate simulation at 40-km spatial resolution. Results show that during El Nino or La Nina winters, strong precipitation anomalies are found in northern California, along the southern California coast, and in the northwest mountains such as the Olympic Mountains, the Cascades, and the northern Rockies. These spatial features, which are strongly affected by topography, are surprisingly well reproduced by the regional climate simulation. A spatial feature investigated further is the positive - negative - positive precipitation anomaly found during El Nino years in the Olympic Mountains, and on the west side and east side of the Cascades in both observations and regional simulation. Observed streamflows of river basins located in those areas are found to be consistent with the precipitation anomalies. The spatial distribution of the precipitation anomalies is investigated by relating flow direction and moisture to the orientation of mountains and orographic precipitation. On the west side of the north - south-oriented Cascade Range, the increase in atmospheric moisture is not enough to compensate for the loss of orographic precipitation associated with a change in flow direction toward the southwest during El Nino years. In California, both the increase in atmospheric moisture and shift in wind direction toward the southwest enhance precipitation along the Sierra, which is oriented northwest to southeast. The spatial signature of the interactions between large-scale circulation and topography may provide useful information for seasonal predictions or climate change detection. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Leung, LR (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999, Richland, WA 99352 USA. RI qian, yun/A-5056-2010; qian, yun/E-1845-2011 NR 27 TC 56 Z9 61 U1 0 U2 10 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0894-8755 J9 J CLIMATE JI J. Clim. PD JUN PY 2003 VL 16 IS 12 BP 1912 EP 1928 DI 10.1175/1520-0442(2003)016<1912:HOTWUS>2.0.CO;2 PG 17 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 688WK UT WOS:000183460100003 ER PT J AU Gardner, SN Kuczmarski, TA Vitalis, EA Slezak, TR AF Gardner, SN Kuczmarski, TA Vitalis, EA Slezak, TR TI Limitations of TaqMan PCR for detecting divergent viral pathogens illustrated by hepatitis A, B, C, and E viruses and human immunodeficiency virus SO JOURNAL OF CLINICAL MICROBIOLOGY LA English DT Article ID DETECTION SYSTEM; IDENTIFICATION; TECHNOLOGY AB Recent events illustrate the imperative to rapidly and accurately detect and identify pathogens, during disease outbreaks, whether they are natural or engineered. Particularly for our primary goal of detecting bioterrorist releases, detection techniques must be both species-wide (capable of detecting all known strains of a given species) and species specific. Due to classification restrictions on the publication of data for species that may pose a bioterror threat, we illustrate the challenges of finding such assays using five nonthreat organisms that are nevertheless of public health concern: human immunodeficiency virus (HIV) and four species of hepatitis viruses. Fluorogenic probe-based PCR assays (TaqMan; Perkin-Elmer Corp., Applied Biosystems, Foster City, Calif.) may be sensitive, fast methods for the identification of species in which the genome is conserved among strains, such as hepatitis A virus. For species such as HIV, however, the strains are highly divergent. We use computational methods to show that nine TaqMan primer and probe sequences, or signatures, are needed to ensure that all strains will be detected, but this is an unfeasible number, considering the cost of TaqMan probes. Strains of hepatitis B, C, and E viruses show intermediate divergence, so that two to three TaqMan signatures are required to detect all strains of each virus. We conclude that for species such as hepatitis A virus with high levels of sequence conservation among strains, signatures can be found computationally for detection by the TaqMan assay, which is a sensitive, rapid, and cost-effective method. However, for species such as HIV with substantial genetic divergence among strains, the TaqMan assay becomes unfeasible and alternative detection methods may be required. We compare the TaqMan assay with some of the alternative nucleic acid-based detection techniques of microarray, chip, and bead technologies in terms of sensitivity, speed, and cost. C1 Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94551 USA. RP Gardner, SN (reprint author), Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, POB 808,L-448,7000 East Ave, Livermore, CA 94551 USA. NR 12 TC 56 Z9 66 U1 0 U2 2 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0095-1137 J9 J CLIN MICROBIOL JI J. Clin. Microbiol. PD JUN PY 2003 VL 41 IS 6 BP 2417 EP 2427 DI 10.1128/JCM.41.6.2417-2427.2003 PG 11 WC Microbiology SC Microbiology GA 688ZB UT WOS:000183466200024 PM 12791858 ER PT J AU Sui, G Orbulescu, J Ji, XJ Gattas-Asfura, KM Leblanc, RM Micic, M AF Sui, G Orbulescu, J Ji, XJ Gattas-Asfura, KM Leblanc, RM Micic, M TI Surface chemistry studies of Quantum Dots (QDs) modified with surfactants SO JOURNAL OF CLUSTER SCIENCE LA English DT Article; Proceedings Paper CT Southeast Regional Meeting of the ACS CY NOV 13, 2000 CL CHARLESTON, SOUTH CAROLINA DE QDs; CdSe; monolayer; air/water interface; surface pressure; molecular area; ESEM ID CDSE NANOCRYSTALS; SEMICONDUCTOR NANOCRYSTALS; AIR/WATER INTERFACE; SPECTROSCOPY; LUMINESCENCE; MONOLAYERS AB Since luminescent CdSe quantum dots (QDs) have shown great potential in biological labeling, the surface chemistry behavior of QDs at interfaces is of great research interest. In the present study, CdSe QDs with green luminescence were modified with hydrophobic chains of varying lengths [from C6 to C18]. These modified QDs can be utilized to form stable monolayers at the air/water interface. Surface pressure-area isotherms of modified QDs have been measured and limiting molecular areas have also been extrapolated in order to analyze the size of the QDs. UV absorption spectra of modified QDs at various surface pressures were also determined. Surface chemistry, as well as the topographic properties, of modified QDs in Langmuir and L-B films was discussed. C1 Univ Miami, Dept Chem, Coral Gables, FL 33124 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Leblanc, RM (reprint author), Univ Miami, Dept Chem, 1301 Mem Dr, Coral Gables, FL 33124 USA. RI Orbulescu, Jhony/D-7829-2012 OI Orbulescu, Jhony/0000-0001-9408-9787 NR 25 TC 17 Z9 17 U1 1 U2 6 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1040-7278 J9 J CLUST SCI JI J. Clust. Sci. PD JUN PY 2003 VL 14 IS 2 BP 123 EP 133 DI 10.1023/A:1024889504216 PG 11 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 702ZE UT WOS:000184254400006 ER PT J AU Lyness, JN AF Lyness, JN TI Notes on lattice rules SO JOURNAL OF COMPLEXITY LA English DT Article; Proceedings Paper CT Seminar on Numerical Integration and Its Complexity CY NOV 18-24, 2001 CL OBERWOLFACH, GERMANY ID TRIGONOMETRIC DEGREE; CUBATURE FORMULAS AB An elementary introduction to lattices, integration lattices and lattice rules is followed by a description of the role of the dual lattice in assessing the trigonometric degree of a lattice rule. The connection with the classical lattice-packing problem is established: any s-dimensional cubature rule can be associated with an index rho = delta(s)/s!N, where delta is the enhanced degree of the rule and N its abscissa count. For lattice rules, this is the packing factor of the associated dual lattice with respect to the unit s-dimensional octahedron. An individual cubature rule may be represented as a point on a plot of rho against delta. Two of these plots are presented. They convey a clear idea of the relative cost-effectiveness of various individual rules and sequences of rules. (C) 2003 Published by Elsevier Science (USA). C1 Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. Univ New S Wales, Sch Math, Sydney, NSW 2052, Australia. RP Lyness, JN (reprint author), Argonne Natl Lab, Div Math & Comp Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 7 TC 8 Z9 8 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0885-064X J9 J COMPLEXITY JI J. Complex. PD JUN PY 2003 VL 19 IS 3 BP 321 EP 331 DI 10.1016/SO885-064X(03)00005-0 PG 11 WC Computer Science, Theory & Methods; Mathematics, Applied SC Computer Science; Mathematics GA 678YM UT WOS:000182894300009 ER PT J AU Alfonso, DR Jordan, KD AF Alfonso, DR Jordan, KD TI A flexible nudged elastic band program for optimization of minimum energy pathways using ab initio electronic structure methods SO JOURNAL OF COMPUTATIONAL CHEMISTRY LA English DT Article DE reaction pathway exploration; nudged elastic band; transition state structure; minimum energy path; driver program ID MOLECULAR-ORBITAL METHODS; FINDING SADDLE-POINTS; DETERMINING REACTION PATHS; GAUSSIAN-BASIS SETS; VALENCE BASIS-SETS; TRANSITION-STATES; DISSOCIATIVE ADSORPTION; FIRST-PRINCIPLES; SI(100) SURFACE; 100 SURFACES AB A driver program for carrying out nudged elastic band optimizations of minimum energy reaction pathways is described. This approach allows for the determination of minimum energy pathways using only energies and gradient information. The driver code has been interfaced with the GAUSSIAN 98 program. Applications to two isomerization reactions and to a cluster model for H-2 desorption from the Si(100)-2x1 surface are presented. (C) 2003 Wiley Periodicals, Inc. C1 Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA. Univ Pittsburgh, Ctr Mol & Mat Simulat, Pittsburgh, PA 15260 USA. Natl Energy Technol Lab, Pittsburgh, PA 15232 USA. RP Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA. EM jordan@a.psc.edu NR 64 TC 17 Z9 17 U1 0 U2 8 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0192-8651 EI 1096-987X J9 J COMPUT CHEM JI J. Comput. Chem. PD JUN PY 2003 VL 24 IS 8 BP 990 EP 996 DI 10.1002/jcc.10233 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA 674ZU UT WOS:000182668900010 PM 12720320 ER PT J AU Johnson, GR Gupta, K Putz, DK Hu, Q Brusseau, ML AF Johnson, GR Gupta, K Putz, DK Hu, Q Brusseau, ML TI The effect of local-scale physical heterogeneity and nonlinear, rate-limited sorption/desorption on contaminant transport in porous media SO JOURNAL OF CONTAMINANT HYDROLOGY LA English DT Article DE sorption/desorption; contaminant transport; porous media ID DIFFUSIVE MASS-TRANSFER; DISTURBED SOIL COLUMNS; SOLUTE TRANSPORT; ORGANIC-CHEMICALS; NONEQUILIBRIUM TRANSPORT; AQUIFER MATERIAL; HYDRODYNAMIC DISPERSION; FLOW INTERRUPTION; AGGREGATED MEDIA; SORPTION AB Nonideal transport of contaminants in porous media has often been observed in laboratory characterization studies. It has long been recognized that multiple processes associated with both physical and chemical factors can contribute to this nonideal transport behavior. To fully understand system behavior, it is important to determine the relative contributions of these multiple factors when conducting contaminant transport and fate studies. In this study, the relative contribution of physical-heterogeneity-related processes versus those of nonlinear, rate-limited sorption/desorption to the observed nonideal transport of trichloroethene in an undisturbed aquifer core was determined through a series of miscible-displacement experiments. The results of experiments conducted using the undisturbed core, collected from a Superfund site in Tucson, AZ, were compared to those obtained from experiments conducted using the same aquifer material packed homogeneously. The results indicate that both physical and chemical factors, specifically preferential flow and associated rate-limited diffusive mass-transfer and rate-limited sorption/desorption, respectively, contributed to the nonideal behavior observed for trichloroethene transport in the undisturbed core. A successful prediction of trichloroethene transport in the undisturbed core was made employing a mathematical model incorporating multiple sources of nonideal transport, using independently determined model parameters to account for the multiple factors contributing to the nonideal transport behavior. The simulation results indicate that local-scale physical heterogeneity controlled the nonideal transport behavior of trichloroethene in the undisturbed core, and that nonlinear, rate-limited sorption/desorption were of secondary importance. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Univ Arizona, Soil Water & Environm Sci Dept, Tucson, AZ 85721 USA. Univ Arizona, Dept Environm Chem & Engn, Tucson, AZ 85721 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA. RP Brusseau, ML (reprint author), Univ Arizona, Soil Water & Environm Sci Dept, Tucson, AZ 85721 USA. RI Hu, Qinhong/C-3096-2009 OI Hu, Qinhong/0000-0002-4782-319X NR 52 TC 27 Z9 29 U1 5 U2 18 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-7722 J9 J CONTAM HYDROL JI J. Contam. Hydrol. PD JUN PY 2003 VL 64 IS 1-2 BP 35 EP 58 DI 10.1016/S0169-7722(02)00103-1 PG 24 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA 684DJ UT WOS:000183189900002 PM 12744828 ER PT J AU Oostrom, M Hofstee, C Lenhard, RJ Wietsma, TW AF Oostrom, M Hofstee, C Lenhard, RJ Wietsma, TW TI Flow behavior and residual saturation formation of liquid carbon tetrachloride in unsaturated heterogeneous porous media SO JOURNAL OF CONTAMINANT HYDROLOGY LA English DT Article DE carbon tetrachloride; Leverett concept; spreading coefficient; DNAPL; intermediate-scale experiment ID ORGANIC-COMPOUNDS; MODEL DEVELOPMENT; MULTIPHASE FLOW; TRANSPORT; DRAINAGE; MOVEMENT; WATER; VERIFICATION; REMEDIATION; IMBIBITION AB The formation of residual, discontinuous nonaqueous phase liquids (NAPLs) in the vadose zone is a process that is not well understood. To obtain data that can be used to study the development of a residual NAPL saturation in the vadose zone and to test current corresponding models, detailed transient experiments were conducted in intermediate-scale columns and flow cell. The column experiments were conducted to determine residual carbon tetrachloride (CCl4) saturations of two sands and to evaluate the effect of CCl4 vapors on the water distribution. In the intermediate-scale flow cell experiment, a rectangular zone of the fine-grained sand was packed in an otherwise medium-grained matrix. A limited amount of CCl4 was injected from a small source and allowed to redistribute until a pseudo steady state situation had developed. A dual-energy gamma radiation system was used to determine fluid saturations at numerous locations. The experiments clearly demonstrated the formation of residual CCl4 saturations in both sands. Simulations with an established multifluid flow simulator show the shortcomings of current relative permeability-saturation-capillary pressure (k-S-P) models. The results indicate that nonspreading behavior of NAPLs should be implemented in simulators to account for the formation of residual saturations. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Pacific NW Natl Lab, Environm Technol Div, Richland, WA 99352 USA. TNO, NITG, Netherlands Inst Appl Geosci, NL-3508 TA Utrecht, Netherlands. Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Oostrom, M (reprint author), Pacific NW Natl Lab, Environm Technol Div, POB 999,MS K9-33, Richland, WA 99352 USA. NR 43 TC 35 Z9 41 U1 0 U2 14 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-7722 J9 J CONTAM HYDROL JI J. Contam. Hydrol. PD JUN PY 2003 VL 64 IS 1-2 BP 93 EP 112 DI 10.1016/S0169-7722(02)00107-9 PG 20 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA 684DJ UT WOS:000183189900005 PM 12744831 ER PT J AU Xu, TF Sonnenthal, E Bodvarsson, G AF Xu, TF Sonnenthal, E Bodvarsson, G TI A reaction-transport model for calcite precipitation and evaluation of infiltration fluxes in unsaturated fractured rock SO JOURNAL OF CONTAMINANT HYDROLOGY LA English DT Article DE calcite; infiltration rate; percolation flux; water-rock interaction; reactive transport modeling ID YUCCA-MOUNTAIN; POROUS-MEDIA; FLUID-FLOW; NEVADA; TUFFS; ZONE; USA AB The percolation flux in the unsaturated zone (UZ) is an important parameter addressed in site characterization and flow and transport modeling of the potential nuclear-waste repository at Yucca Mountain, NV, USA. The US Geological Survey (USGS) has documented hydrogenic calcite abundances in fractures and lithophysal cavities at Yucca Mountain to provide constraints on percolation fluxes in the UZ. The purpose of this study was to investigate the relationship between percolation flux and measured calcite abundances using reactive transport modeling. Our model considers the following essential factors affecting calcite precipitation: (1) infiltration, (2) the ambient geothermal gradient, (3) gaseous CO2 diffusive transport and partitioning in liquid and gas phases, (4) fracture-matrix interaction for water flow and chemical constituents, and (5) water-rock interaction. Over a bounding range of 2-20 mm/year infiltration rate, the simulated calcite distributions capture the trend in calcite abundances measured in a deep borehole (WT-24) by the USGS. The calcite is found predominantly in fractures in the welded tuffs, which is also captured by the model simulations. Simulations showed that from about 2 to 6 mm/year, the amount of calcite precipitated in the welded Topopah Spring tuff is sensitive to the infiltration rate. This dependence decreases at higher infiltration rates owing to a modification of the geothermal gradient from the increased percolation flux. The model also confirms the conceptual model for higher percolation fluxes in the fractures compared to the matrix in the welded units, and the significant contribution of Ca from water-rock interaction. This study indicates that reactive transport modeling of calcite deposition can yield important constraints on the unsaturated zone infiltration-percolation flux and provide useful insight into processes such as fracture-matrix interaction as well as conditions and parameters controlling calcite deposition. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM tianfu_xu@lbl.gov RI Sonnenthal, Eric/A-4336-2009 NR 22 TC 18 Z9 20 U1 0 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-7722 EI 1873-6009 J9 J CONTAM HYDROL JI J. Contam. Hydrol. PD JUN PY 2003 VL 64 IS 1-2 BP 113 EP 127 DI 10.1016/S0169-7722(02)00089-X PG 15 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA 684DJ UT WOS:000183189900006 PM 12744832 ER PT J AU Coltrin, ME Mitchell, CC AF Coltrin, ME Mitchell, CC TI Mass transport and kinetic limitations in MOCVD selective-area growth SO JOURNAL OF CRYSTAL GROWTH LA English DT Article DE transport; epitaxial lateral overgrowth-; selective-area growth; gallium nitride ID CHEMICAL-VAPOR-DEPOSITION; LATERAL EPITAXIAL OVERGROWTH; PHASE EPITAXY; ROTATING-DISK; HEAT-TRANSFER; QUANTUM-WELLS; GAN; REACTOR; MODEL; FLOW AB The interplay between transport and kinetics in selective-area growth (SAG) of compound semiconductors is discussed. A thin-film model describing transport of reactants across the boundary layer above the growth surface is developed. A dimensionless Damkohler number (Da) quantitatively determines whether the planar (blanket) deposition is in a transport-limited, reaction-rate-limited, or intermediate operating regime. Reactant profiles within the rotating-disk reactor and growth rates predicted by the thin-film model agree very well with numerically exact calculations. The efficiency of the SAG was found to be a strong function of both the Da and the pattern fill-factor (theta). The thin-film model was extended to take into account the lowering of the "effective rate constant" (averaged over both the exposed and masked zones). It was found that the product thetaDa governs the transition between transport and kinetic control of the SAG process. Predictions of the analytical SAG thin-film model were compared to both the numerically exact 2-D calculations and to experimental results from InGaAs, InP, and GaN SAG. The simple theory appears to provide an excellent qualitative and quantitative description of kinetic and transport effects in SAG. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Sandia Natl Labs, Dept 1126, Albuquerque, NM 87185 USA. RP Coltrin, ME (reprint author), Sandia Natl Labs, Dept 1126, POB 5800, Albuquerque, NM 87185 USA. NR 45 TC 44 Z9 47 U1 4 U2 38 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD JUN PY 2003 VL 254 IS 1-2 BP 35 EP 45 DI 10.1016/S0022-0248(03)01165-5 PG 11 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 684YU UT WOS:000183234700006 ER PT J AU Wang, TH Ciszek, TF Page, MR AF Wang, TH Ciszek, TF Page, MR TI Crystallographic control in thin-layer silicon depositions by atmospheric-pressure iodine vapor transport SO JOURNAL OF CRYSTAL GROWTH LA English DT Article DE interfaces; polycrystalline deposition; atmospheric-pressure iodine vapor transport; semiconducting silicon AB Silicon thin layers that are either highly textured polycrystalline, randomly oriented polycrystalline, or epitaxial have been deposited by the technique of atmospheric-pressure iodine vapor transport on silicon or non-silicon substrates. Strongly [1 1 0]-textured polycrystalline silicon films are obtained by starting with a relatively low starting substrate temperature of 700degreesC, to increase nucleation density, then ramping up to 900degreesC at the end to increase growth rate. Alternatively, if a higher constant temperature of 900degreesC is used, we obtain polycrystalline silicon layers with randomly oriented large grains of similar to 20 mum in average size. When a still higher initial substrate temperature of 1000degreesC is used to eliminate condensation of silicon iodides at the interface, high-quality epitaxial silicon layers are grown on silicon substrates. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Natl Ctr Photovolta, Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Wang, TH (reprint author), Natl Ctr Photovolta, Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 4 TC 2 Z9 2 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD JUN PY 2003 VL 253 IS 1-4 BP 183 EP 189 DI 10.1016/S0022-0248(03)01104-7 PG 7 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 684TR UT WOS:000183223100026 ER PT J AU Schaffers, KI Tassano, JB Bayramian, AB Morris, RC AF Schaffers, KI Tassano, JB Bayramian, AB Morris, RC TI Growth of Yb : S-FAP [Yb3+: Sr-5(PO4)(3)F] crystals for the Mercury laser SO JOURNAL OF CRYSTAL GROWTH LA English DT Article DE defects; phase equilibria; Czochralski method; oxides; solid state lasers AB Crystals of Yb:S-FAP [Yb3+:Sr-5(PO4)(3)F] will be used as the gain medium for the Mercury Laser, a gas-cooled amplifier system intended to yield 100 J, 10 Hz and 10% efficiency in 3 ns when completed, for inertial fusion energy. Growing high optical quality crystals is a challenge due to a number of growth issues, including: cloudiness, bubble core defects, anomalous absorption, low-angle grain boundaries, cracking, and crystal inclusions. At this time, a growth process has been developed to simultaneously eliminate or diminish each of the defects. Published by Elsevier Science B.V. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Schaffers, KI (reprint author), Lawrence Livermore Natl Lab, POB 808,L-482, Livermore, CA 94551 USA. NR 15 TC 28 Z9 28 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD JUN PY 2003 VL 253 IS 1-4 BP 297 EP 306 DI 10.1016/S0022-0248(03)01032-7 PG 10 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 684TR UT WOS:000183223100045 ER PT J AU Matthews, JD Havrilla, GJ AF Matthews, J. D., Jr. Havrilla, G. J. TI X-ray fluorescence spectrometry as a method of qualitative analysis of elemental distribution in teeth. SO JOURNAL OF DENTAL RESEARCH LA English DT Meeting Abstract C1 Los Alamos Natl Lab, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R PI ALEXANDRIA PA 1619 DUKE ST, ALEXANDRIA, VA 22314-3406 USA SN 0022-0345 J9 J DENT RES JI J. Dent. Res. PD JUN PY 2003 VL 82 SI B MA 0945 BP B131 EP B131 PG 1 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA V42UY UT WOS:000202893601157 ER PT J AU Nalla, RK Kinney, JH Marshall, SJ Ritchie, RO AF Nalla, R. K. Kinney, J. H. Marshall, S. J. Ritchie, R. O. TI Failure of dentin: Development of a fracture-mechanics-based framework. SO JOURNAL OF DENTAL RESEARCH LA English DT Meeting Abstract C1 Lawrence Berkeley Lab, Berkeley, CA USA. Univ Calif San Francisco, San Francisco, CA 94143 USA. RI Ritchie, Robert/A-8066-2008 OI Ritchie, Robert/0000-0002-0501-6998 NR 0 TC 0 Z9 0 U1 0 U2 1 PU INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R PI ALEXANDRIA PA 1619 DUKE ST, ALEXANDRIA, VA 22314-3406 USA SN 0022-0345 J9 J DENT RES JI J. Dent. Res. PD JUN PY 2003 VL 82 SI B MA 0085 BP B23 EP B23 PG 1 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA V42UY UT WOS:000202893600084 ER PT J AU Tomsia, AP Saiz, E Lopez-Esteban, S Pavon, JJ Jimenez-Pique, E Anglada, M AF Tomsia, A. P. Saiz, E. Lopez-Esteban, S. Pavon, J. J. Jimenez-Pique, E. Anglada, M. TI Influence of processing conditions on the micro-mechanical properties of glass coatings on Ti6AI4V for biomedical applications. SO JOURNAL OF DENTAL RESEARCH LA English DT Meeting Abstract C1 Lawrence Berkeley Natl Lab, Berkeley, CA USA. Univ Politecn Catalunya, Barcelona, Spain. NR 0 TC 0 Z9 0 U1 0 U2 1 PU INT AMER ASSOC DENTAL RESEARCHI A D R/A A D R PI ALEXANDRIA PA 1619 DUKE ST, ALEXANDRIA, VA 22314-3406 USA SN 0022-0345 J9 J DENT RES JI J. Dent. Res. PD JUN PY 2003 VL 82 SI B MA 1818 BP B238 EP B238 PG 1 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA V42UY UT WOS:000202893602259 ER PT J AU Ritchie, RH Lambin, P Lambert, D Vigneron, JP Echenique, P AF Ritchie, RH Lambin, P Lambert, D Vigneron, JP Echenique, P TI In Honor of Professor Amand A. Lucas on the occasion of his retirement - Introduction SO JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA LA English DT Biographical-Item C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Fac Univ Notre Dame Paix, B-5000 Namur, Belgium. Univ Basque Country, Dept Fis Mat, E-20018 San Sebastian, Spain. RP Ritchie, RH (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. EM ekr@ornl.gov RI CSIC-UPV/EHU, CFM/F-4867-2012; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014 NR 1 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0368-2048 J9 J ELECTRON SPECTROSC JI J. Electron Spectrosc. Relat. Phenom. PD JUN PY 2003 VL 129 IS 2-3 BP 83 EP 85 DI 10.1016/S0368-2048(03)00085-9 PG 3 WC Spectroscopy SC Spectroscopy GA 699DR UT WOS:000184041100001 ER PT J AU Thomson, BM Smith, CL Busch, RD Siegel, MD Baldwin, C AF Thomson, BM Smith, CL Busch, RD Siegel, MD Baldwin, C TI Removal of metals and radionuclides using apatite and other natural sorbents SO JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE LA English DT Article DE metals; adsorption; phosphate; abatement and removal; radioactive materials; wastewater treatment ID HYDROXYAPATITE; SORPTION; URANIUM; IONS AB Treatment of waste water for removal of low levels of actinides, particularly plutonium, uranium, and americium, and hazardous metals has been and continues to be a challenge. This study evaluated the use of apatite and other natural materials for use as sorbents to treat water streams containing As, Am, Pu, Se, Tc, and U. Nine sorbents were tested including natural and synthetic apatites, tri-calcium phosphate, bone char, and activated magnetite. The sorption properties were tested in batch studies and in column tests. There was moderate sorption of As, Se, Sr, Cs, and Tc, but very good removal of U and Pu by the phosphate adsorbents. The Am results were inconclusive. The synthetic apatites had higher capacities than the natural apatites from phosphate rock and fish bones. C1 Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA. CH2M Hill Inc, Albuquerque, NM 87109 USA. Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Rocky Mt Remediat Serv, Golden, CO 80401 USA. RP Thomson, BM (reprint author), Univ New Mexico, Dept Civil Engn, Albuquerque, NM 87131 USA. NR 19 TC 32 Z9 32 U1 3 U2 37 PU ASCE-AMER SOC CIVIL ENGINEERS PI RESTON PA 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA SN 0733-9372 J9 J ENVIRON ENG-ASCE JI J. Environ. Eng.-ASCE PD JUN PY 2003 VL 129 IS 6 BP 492 EP 499 DI 10.1061/(ASCE)0733-9372(2003)129:6(492) PG 8 WC Engineering, Environmental; Engineering, Civil; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 680CD UT WOS:000182958000002 ER PT J AU Linford, R Betti, R Dahlburg, J Asay, J Campbell, M Colella, P Freidberg, J Goodman, J Hammer, D Hoagland, J Jardin, S Lindl, J Logan, G Matzen, K Navratil, G Nobile, A Sethian, J Sheffield, J Tillack, M Weisheit, J AF Linford, R Betti, R Dahlburg, J Asay, J Campbell, M Colella, P Freidberg, J Goodman, J Hammer, D Hoagland, J Jardin, S Lindl, J Logan, G Matzen, K Navratil, G Nobile, A Sethian, J Sheffield, J Tillack, M Weisheit, J TI A review of the US Department of Energy's Inertial Fusion Energy program SO JOURNAL OF FUSION ENERGY LA English DT Article DE fusion energy; inertial confinement fusion ID ISENTROPIC COMPRESSION; LASER; PLASMA; IGNITION; TARGETS; DRIVEN AB This is the final report of a panel set up by the U.S. Department of Energy (DOE) Fusion Energy Sciences Advisory Committee (FESAC) in response to a charge letter from Dr. Ray Orbach (Appendix A). In that letter, Dr. Orbach asked FESAC for "an assessment of the present status of" inertial fusion energy (IFE) research carried out in contributing programs. These programs include the heavy ion (HI) beam, the high average power laser (HAPL), and Z-Pinch drivers and associated technologies, including fast ignition (FI). This report, presented to FESAC on March 29, 2004, and subsequently approved by them (Appendix B), presents FESAC's response to that charge. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Rochester, Rochester, NY 14627 USA. USN, Res Lab, Washington, DC 20375 USA. Washington State Univ, Pullman, WA 99164 USA. Gen Atom, San Diego, CA USA. Lawrence Berkeley Natl Lab, Berkeley, CA USA. MIT, Cambridge, MA 02139 USA. Princeton Univ, Princeton, NJ 08544 USA. Cornell Univ, Ithaca, NY 14853 USA. Tennessee Valley Author, Knoxville, TN USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Sandia Natl Labs, Livermore, CA 94550 USA. Columbia Univ, New York, NY 10027 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Tennessee, Knoxville, TN USA. Univ Calif San Diego, San Diego, CA 92103 USA. RP Linford, R (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave,Bldg 121,Room 1035, Livermore, CA 94550 USA. EM rulon.linford@ucop.edu RI Jardin, Stephen/E-9392-2010 NR 42 TC 5 Z9 9 U1 1 U2 4 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0164-0313 J9 J FUSION ENERG JI J. Fusion Energy PD JUN PY 2003 VL 22 IS 2 BP 93 EP 126 DI 10.1023/B:JOFE.0000036408.11067.cd PG 34 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 850WS UT WOS:000223645700002 ER PT J AU Nevins, WM Brown, M Chan, V Ditmire, T D'lppolito, D Dubin, D Greenwald, M Glasser, A Kruer, W Mauel, M Redi, M Rosner, R Sovinec, C Synakowski, E Wolf, R AF Nevins, WM Brown, M Chan, V Ditmire, T D'lppolito, D Dubin, D Greenwald, M Glasser, A Kruer, W Mauel, M Redi, M Rosner, R Sovinec, C Synakowski, E Wolf, R TI Report of the first fusion energy sciences IF committee of visitors SO JOURNAL OF FUSION ENERGY LA English DT Article DE fusion theory; fusion computation; fusion science AB This is the final report of a Committee of Visitors (COV) set up by the U.S. Department of Energy (DOE) Fusion Energy Sciences Advisory Committee (FESAC) in response to a charge letter from DOE Office of Science Director Raymond Orbach (Appendix A). In that letter, Dr. Orbach asked FESAC to "assess matters pertaining to program decisions" for the DOE's fusion theory and computation programs. This report, submitted to FESAC on March 29, 2004, and subsequently approved by them (Appendix B), presents FESACs response to that charge. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Swarthmore Coll, Swarthmore, PA 19081 USA. Gen Atom Co, San Diego, CA 92138 USA. Univ Texas, Austin, TX USA. Lodestar Corp, Boulder, CO USA. Univ Calif San Diego, San Diego, CA 92103 USA. MIT, Cambridge, MA 02139 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Columbia Univ, New York, NY 10027 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Univ Chicago, Chicago, IL 60637 USA. Univ Wisconsin, Madison, WI USA. Rice Univ, Houston, TX 77251 USA. RP Nevins, WM (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave L-637, Livermore, CA 94550 USA. EM nev-ins@llnl.gov OI Mauel, Michael/0000-0003-2490-7478; Greenwald, Martin/0000-0002-4438-729X NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0164-0313 J9 J FUSION ENERG JI J. Fusion Energy PD JUN PY 2003 VL 22 IS 2 BP 127 EP 138 DI 10.1023/B:JOFE.0000036409.48704.49 PG 12 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 850WS UT WOS:000223645700003 ER PT J AU Thomas, E Morales, G Brown, M Carter, T Correll, D Gentle, K Post-Zwicker, A Schultz, K Steiner, D Scime, E AF Thomas, E Morales, G Brown, M Carter, T Correll, D Gentle, K Post-Zwicker, A Schultz, K Steiner, D Scime, E TI Fusion in the era of burning plasma studies: Workforce planning for 2004-2014 SO JOURNAL OF FUSION ENERGY LA English DT Article DE fusion energy; fusion science; fusion workforce AB This is the final report of a panel set up by the U.S. Department of Energy (DOE) Fusion Energy Sciences Advisory Committee (FESAC) in response to a charge letter from Dr. Raymond Orbach (Appendix A), asking FESAC to "addressed the issue of workforce development in the U.S. fusion program." This report, submitted to FESAC March 29, 2004 and subsequently approved by them (Appendix B), presents FESAC's response to that charge. C1 Auburn Univ, Dept Phys, Auburn, AL 36849 USA. Auburn Univ, Auburn, AL 36849 USA. Univ Calif Los Angeles, Los Angeles, CA USA. Swarthmore Coll, Swarthmore, PA 19081 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. Univ Texas, Austin, TX 78712 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Gen Atom Co, San Diego, CA 92138 USA. Rensselaer Polytech Inst, Troy, NY 12181 USA. W Virginia Univ, Morgantown, WV 26506 USA. RP Thomas, E (reprint author), Auburn Univ, Dept Phys, Auburn, AL 36849 USA. EM etjr@physics.auburn.edu RI Carter, Troy/E-7090-2010 OI Carter, Troy/0000-0002-5741-0495 NR 7 TC 0 Z9 0 U1 0 U2 1 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0164-0313 J9 J FUSION ENERG JI J. Fusion Energy PD JUN PY 2003 VL 22 IS 2 BP 139 EP 172 PG 34 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 850WS UT WOS:000223645700004 ER PT J AU Bern, Z De Freitas, A Dixon, L AF Bern, Z De Freitas, A Dixon, L TI Two-loop helicity amplitudes for quark-gluon scattering in QCD and gluino-gluon scattering in supersymmetric Yang-Mills theory SO JOURNAL OF HIGH ENERGY PHYSICS LA English DT Article DE QCD; NLO computations; jets; hadronic colliders ID JET CROSS-SECTIONS; INELASTIC STRUCTURE FUNCTIONS; HIGHER-ORDER CORRECTIONS; ONE-LOOP CORRECTIONS; TO-LEADING ORDER; LIGHT-LIKE LEGS; GAUGE-THEORIES; DIMENSIONAL REDUCTION; PARTON DISTRIBUTIONS; RADIATIVE-CORRECTIONS AB We present the two-loop QCD helicity amplitudes for quark-gluon scattering, and for quark-antiquark annihilation into two gluons. These amplitudes are relevant for next-to-next-to-leading order corrections to (polarized) jet production at hadron colliders. We give the results in the 't Hooft-Veltman and four-dimensional helicity (FDH) variants of dimensional regularization. The transition rules for converting the amplitudes between the different variants are much more intricate than for the previously discussed case of gluon-gluon scattering. Summing our two-loop expressions over helicities and colors, and converting to conventional dimensional regularization, gives results in complete agreement with those of Anastasiou, Glover, Oleari and Tejeda-Yeomans. We describe the amplitudes for 2 --> 2 scattering in pure N = 1 supersymmetric Yang-Mills theory, obtained from the QCD amplitudes by modifying the color representation and multiplicities, and verify supersymmetry Ward identities in the FDH scheme. C1 Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. DESY, D-15738 Zeuthen, Germany. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. EM bern@physics.ucla.edu; dfreitas@ifh.de; lance@slac.stanford.edu NR 95 TC 47 Z9 47 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1029-8479 J9 J HIGH ENERGY PHYS JI J. High Energy Phys. PD JUN PY 2003 IS 6 AR 028 DI 10.1088/1126-6708/2003/06/028 PG 78 WC Physics, Particles & Fields SC Physics GA 717HV UT WOS:000185083400028 ER PT J AU Fabinger, M McGreevy, J AF Fabinger, M McGreevy, J TI On smooth time-dependent orbifolds and null singularities SO JOURNAL OF HIGH ENERGY PHYSICS LA English DT Article DE bosonic strings; superstrings and heterotic strings; conformal field models in string theory ID STRING THEORY; SUPERSTRING THEORY; BACKGROUNDS; BRANES; SUPERSYMMETRY; FIELDS; WAVES AB We study string theory on a non-singular time-dependent orbifold of flat space, known as the 'null-brane'. The orbifold group, which involves only space-like identifications, is obtained by a combined action of a null Lorentz transformation and a constant shift in an extra direction. In the limit where the shift goes to zero, the geometry of this orbifold reproduces an orbifold with a light-like singularity, which was recently studied by Liu, Moore and Seiberg [9]. We find that the backreaction on the geometry due to a test particle can be made arbitrarily small, and that there are scattering processes which can be studied in the approximation of a constant background. We quantize strings on this orbifold and calculate the torus partition function. We construct a basis of states on the smooth orbifold whose tree level string interactions are nonsingular. We discuss the existence of physical modes in the singular orbifold which resolve the singularity. We also describe another way of making the singular orbifold smooth which involves a sandwich ppwave. C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Stanford Univ, Dept Phys, Stanford, CA 94305 USA. EM fabinger@stanford.edu; mcgreevy@stanford.edu NR 63 TC 40 Z9 40 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1029-8479 J9 J HIGH ENERGY PHYS JI J. High Energy Phys. PD JUN PY 2003 IS 6 AR 042 PG 21 WC Physics, Particles & Fields SC Physics GA 717HV UT WOS:000185083400042 ER PT J AU Rizzo, TG AF Rizzo, TG TI Kaluza-Klein/Z ' differentiation at the LHC and linear collider SO JOURNAL OF HIGH ENERGY PHYSICS LA English DT Article DE extra large dimensions; beyond Standard Model; hadronic colliders ID STANDARD MODEL; PHENOMENOLOGICAL ASPECTS; FUTURE COLLIDERS; DIMENSION; EXCITATIONS; HIERARCHY; BREAKING; TESTS; MASS AB We explore the capabilities of the LHC and the Linear Collider(LC) to distinguish the production of Kaluza-Klein (KK) excitations from an ordinary Z' within the context of theories with TeV scale extra dimensions. At the LHC, these states are directly produced in the Drell-Yan channel while at the LC the effects of their exchanges are indirectly felt as new contact interactions in processes such as e(+)e(-) --> f(f) over bar. While we demonstrate that the LC is somewhat more capable at KK/Z' differentiation than is the LHC, the simplest LC analysis relies upon the LHC data for the resonance mass as an important necessary input. C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM rizzo@slac.stanford.edu NR 47 TC 8 Z9 8 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1029-8479 J9 J HIGH ENERGY PHYS JI J. High Energy Phys. PD JUN PY 2003 IS 6 AR 021 PG 17 WC Physics, Particles & Fields SC Physics GA 717HV UT WOS:000185083400021 ER PT J AU Sadri, D Sheikh-Jabbari, MM AF Sadri, D Sheikh-Jabbari, MM TI String theory on parallelizable PP-waves SO JOURNAL OF HIGH ENERGY PHYSICS LA English DT Article DE Penrose limit and pp-wave background; AdS-CFT and dS-CFT correspondence; D-branes ID SL(2,R) WZW MODEL; D-BRANE SOLUTIONS; PENROSE LIMITS; BLACK-HOLE; SUPERGRAVITY; DUALITY; COMPACTIFICATION; DYNAMICS; TORSION; ADS(3) AB The most general parallelizable pp-wave backgrounds which are non-dilatonic solutions in the NS-NS sector of type IIA and IIB string theories are considered. We demonstrate that parallelizable pp-wave backgrounds are necessarily homogeneous plane-waves, and that a large class of homogeneous plane-waves are parallelizable, stating the necessary conditions. Such plane-waves can be classified according to the number of preserved supersymmetries. In type IIA, these include backgrounds preserving 16, 18, 20, 22 and 24 supercharges, while in the 1113 case they preserve 16, 20, 24 or 28 supercharges. An intriguing property of parallelizable pp-wave backgrounds is that the bosonic part of these solutions are invariant under T-duality, while the number of supercharges might change under T-duality. Due to their alpha' exactness, they provide interesting backgrounds for studying string theory. Quantization of string modes, their compactification and behaviour under T-duality are studied. In addition, we consider BPS Dp-branes, and show that these Dp-branes can be classified in terms of the locations of their world volumes with respect to the background H-field. C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA. EM darius@itp.stanford.edu; jabbari@itp.stanford.edu NR 59 TC 15 Z9 15 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1029-8479 J9 J HIGH ENERGY PHYS JI J. High Energy Phys. PD JUN PY 2003 IS 6 AR 005 PG 35 WC Physics, Particles & Fields SC Physics GA 717HV UT WOS:000185083400005 ER PT J AU Anderson, CJ Arritt, RW Takle, ES Pan, ZT Gutowski, WJ Otieno, FO da Silva, R Caya, D Christensen, JH Luthi, D Gaertner, MA Gallardo, C Giorgi, F Hong, SY Jones, C Juang, HMH Katzfey, JJ Lapenta, WM Laprise, R Larson, JW Liston, GE McGregor, JL Pielke, RA Roads, JO Taylor, JA AF Anderson, CJ Arritt, RW Takle, ES Pan, ZT Gutowski, WJ Otieno, FO da Silva, R Caya, D Christensen, JH Luthi, D Gaertner, MA Gallardo, C Giorgi, F Hong, SY Jones, C Juang, HMH Katzfey, JJ Lapenta, WM Laprise, R Larson, JW Liston, GE McGregor, JL Pielke, RA Roads, JO Taylor, JA TI Hydrological processes in regional climate model simulations of the central United States flood of June-July 1993 SO JOURNAL OF HYDROMETEOROLOGY LA English DT Article ID LOW-LEVEL JET; WATER-VAPOR TRANSPORT; MESOSCALE CONVECTIVE COMPLEXES; BOUNDARY-LAYER; NORTH-AMERICA; GREAT-PLAINS; SPECTRAL MODEL; SURFACE EVAPORATION; SCALE ENVIRONMENT; LAND-SURFACE AB Thirteen regional climate model(RCM) simulations of June - July 1993 were compared with each other and observations. Water vapor conservation and precipitation characteristics in each RCM were examined for a 108 x 10degrees subregion of the upper Mississippi River basin, containing the region of maximum 60-day accumulated precipitation in all RCMs and station reports. All RCMs produced positive precipitation minus evapotranspiration ( P - E > 0), though most RCMs produced P - E below the observed range. RCM recycling ratios were within the range estimated from observations. No evidence of common errors of E was found. In contrast, common dry bias of P was found in the simulations. Daily cycles of terms in the water vapor conservation equation were qualitatively similar in most RCMs. Nocturnal maximums of P and C ( convergence) occurred in 9 of 13 RCMs, consistent with observations. Three of the four driest simulations failed to couple P and C overnight, producing afternoon maximum P. Further, dry simulations tended to produce a larger fraction of their 60-day accumulated precipitation from low 3-h totals. In station reports, accumulation from high ( low) 3-h totals had a nocturnal ( early morning) maximum. This time lag occurred, in part, because many mesoscale convective systems had reached peak intensity overnight and had declined in intensity by early morning. None of the RCMs contained such a time lag. It is recommended that short-period experiments be performed to examine the ability of RCMs to simulate mesoscale convective systems prior to generating long-period simulations for hydroclimatology. C1 Iowa State Univ, Dept Agron, Ames, IA 50011 USA. Iowa State Univ, Dept Geol & Atmospher Sci, Ames, IA 50011 USA. CSIRO, Aspendale, Vic, Australia. Danish Meteorol Inst, Copenhagen, Denmark. Natl Ctr Environm Predict, Camp Springs, MD USA. Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA. NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. Univ Quebec, Dept Earth & Atmospher Sci, Montreal, PQ H3C 3P8, Canada. Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA. Int Ctr Theoret Phys, Trieste, Italy. Swedish Meteorol & Hydrol Inst, Rossby Ctr, S-60176 Norrkoping, Sweden. ETH, Swiss Fed Inst Technol, Zurich, Switzerland. Univ Castilla La Mancha, Environm Sci Fac, Toledo, Spain. Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. Duke Univ, Dept Civil & Environm Engn, Durham, NC 27706 USA. Yonsei Univ, Dept Atmospher Sci, Seoul 120749, South Korea. RP Anderson, CJ (reprint author), Iowa State Univ, Dept Agron, 3010 Agron Hall, Ames, IA 50011 USA. EM candersn@iastate.edu RI Pielke, Roger/A-5015-2009; Taylor, John/E-5894-2010; McGregor, John/C-6646-2012; Pan, Zaitao/D-7846-2012; Hong, Song-You/I-3824-2012; Katzfey, Jack/K-1231-2012; Giorgi, Filippo/C-3169-2013; Christensen, Jens/C-4162-2013; Ramos-da-Silva, Renato/I-4759-2012 OI Taylor, John/0000-0001-9003-4076; Katzfey, Jack/0000-0002-0604-8860; Christensen, Jens/0000-0002-9908-8203; NR 75 TC 39 Z9 40 U1 3 U2 10 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 1525-755X J9 J HYDROMETEOROL JI J. Hydrometeorol. PD JUN PY 2003 VL 4 IS 3 BP 584 EP 598 DI 10.1175/1525-7541(2003)004<0584:HPIRCM>2.0.CO;2 PG 15 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 684VM UT WOS:000183227300008 ER PT J AU Kreyssig, A Stockert, O Dreyhaupt, A Ressouche, E Grenier, B Ritter, C Bitterlich, H Behr, G Canfield, PC Loewenhaupt, M AF Kreyssig, A Stockert, O Dreyhaupt, A Ressouche, E Grenier, B Ritter, C Bitterlich, H Behr, G Canfield, PC Loewenhaupt, M TI Magnetic order of TbNi2B2C SO JOURNAL OF LOW TEMPERATURE PHYSICS LA English DT Article AB Neutron-diffraction experiments on TbNi2B2C single crystals are reported for temperatures below 20 K. The evidence of magnetic satellite reflections of 2(nd) order and the observation of satellite reflections close to nuclear reflections instead of ferromagnetic signals request modifications of the known model for the magnetic structure. C1 Tech Univ Dresden, Inst Angew Phys, D-01062 Dresden, Germany. Max Planck Inst, CPfS, D-01187 Dresden, Germany. CEA Grenoble, DRFMC, SPSMS MDN, F-38054 Grenoble, France. Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France. Zent Inst Festkorperphys & Werkstofforsch, D-01171 Dresden, Germany. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RP Kreyssig, A (reprint author), Tech Univ Dresden, Inst Angew Phys, D-01062 Dresden, Germany. RI Dreyhaupt, Andre/C-4870-2008; Canfield, Paul/H-2698-2014 NR 9 TC 4 Z9 4 U1 0 U2 0 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0022-2291 J9 J LOW TEMP PHYS JI J. Low Temp. Phys. PD JUN PY 2003 VL 131 IS 5-6 BP 1129 EP 1133 DI 10.1023/A:1023413512913 PG 5 WC Physics, Applied; Physics, Condensed Matter SC Physics GA 670HX UT WOS:000182402600053 ER PT J AU Karapetrov, G Welp, U Rydh, A Iavarone, M Kwok, WK Crabtree, GW Marcenat, C Paulius, L Klein, T Marcus, J Kim, KHP Jung, CU Lee, HS Kang, B Lee, SI AF Karapetrov, G Welp, U Rydh, A Iavarone, M Kwok, WK Crabtree, GW Marcenat, C Paulius, L Klein, T Marcus, J Kim, KHP Jung, CU Lee, HS Kang, B Lee, SI TI Phase diagram of single crystal MgB2 SO JOURNAL OF LOW TEMPERATURE PHYSICS LA English DT Article ID ANISOTROPIC SUPERCONDUCTING PROPERTIES; UPPER CRITICAL-FIELD; FLUX-LINE-LATTICE; MAGNETIZATION DATA; ART.; TEMPERATURE; DEPENDENCE; GAPS; LUNI2B2C; YNI2B2C AB Using magnetization, magneto-transport and single-crystal specific heat measurements we have determined the superconducting phase diagram of MgB2. The superconducting anisotropy gamma changes monotonously from a value of around 2 near T-c to above 4.5 at 22 K. For Hparallel toc a pronounced peak effect in the critical current occurs at the upper critical field. We present a strong evidence for a surface superconducting state for Hparallel toc which might account for the wide spread in reported values of the superconducting anisotropy gamma. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. CEA Grenoble, Dept Rech Fondamentale Mat Condensee, Serv Phys Magnetisme & Superconduct, F-38054 Grenoble, France. CNRS, Lab Etud Proprits Solides, F-38042 Grenoble, France. Pohang Univ Sci & Technol, NCRICS, Pohang 790784, South Korea. Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea. RP Karapetrov, G (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Iavarone, Maria/C-3628-2008; Rydh, Andreas/A-7068-2012; Karapetrov, Goran/C-2840-2008 OI Rydh, Andreas/0000-0001-6641-4861; Karapetrov, Goran/0000-0003-1113-0137 NR 37 TC 1 Z9 1 U1 1 U2 4 PU SPRINGER/PLENUM PUBLISHERS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0022-2291 EI 1573-7357 J9 J LOW TEMP PHYS JI J. Low Temp. Phys. PD JUN PY 2003 VL 131 IS 5-6 BP 1237 EP 1244 DI 10.1023/A:1023446420182 PG 8 WC Physics, Applied; Physics, Condensed Matter SC Physics GA 670HX UT WOS:000182402600069 ER PT J AU Bosze, EJ Hirata, GA Shea-Rohwer, LE McKittrick, J AF Bosze, EJ Hirata, GA Shea-Rohwer, LE McKittrick, J TI Improving the efficiency of a blue-emitting phosphor by an energy transfer from Gd3+ to Ce3+ SO JOURNAL OF LUMINESCENCE LA English DT Article DE cathodoluminescence; photoluminescence; luminescence efficiency; energy transfer ID COMBUSTION PROCESS; OXYORTHOSILICATES; TB3+ AB The low-voltage efficiency of the blue-emitting phosphor, cerium activated yttrium silicate (Y1-mCem)(2)SiO5, has been improved by co-activating with gadolinium, (Y1-m-nCemGdn)(2)SiO5. Gd3+ improves the efficiency by transferring energy to Ce3+, and makes this phosphor a more promising candidate for low-voltage field emission flat panel displays. Low-voltage cathodoluminescence and photoluminescence measurements were made to determine the optimum concentrations of Gd3+ that yielded the most luminous efficient phosphor. For photoluminescence, Ce3+ Most efficiently luminesces at the excitation wavelength lambda(ex) = 358 nm. Co-activating with Gd3+ did not improve the photoluminescent efficiency because Gd3+ does not absorb at Ce3+ excitation energy, and thus cannot transfer energy. For low-voltage cathodoluminescence, co-activating with Gd3+ did improve the efficiency since Gd3+ was sufficiently excited, with the optimum composition found to be (Y0.8425Ce0.0075Gd0.15)(2)SiO5. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA. Univ Calif San Diego, Mat Sci & Engn Program, La Jolla, CA 92093 USA. Univ Nacl Autonoma Mexico, Ctr Ciencias Mat Condensada, Ensenada 22860, Baja California, Mexico. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP McKittrick, J (reprint author), Univ Calif San Diego, Dept Mech & Aerosp Engn, 9500 Gilman Dr, La Jolla, CA 92093 USA. RI Hirata, Gustavo/E-2532-2016 NR 17 TC 61 Z9 64 U1 0 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-2313 J9 J LUMIN JI J. Lumines. PD JUN PY 2003 VL 104 IS 1-2 BP 47 EP 54 DI 10.1016/S0022-2313(02)00663-4 PG 8 WC Optics SC Optics GA 673DG UT WOS:000182564500006 ER PT J AU Blanton, WB AF Blanton, WB TI BlochLib: a fast NMR C++ tool kit SO JOURNAL OF MAGNETIC RESONANCE LA English DT Article ID SOLID-STATE NMR; ORDINARY DIFFERENTIAL-EQUATIONS; NUCLEAR-MAGNETIC-RESONANCE; EXTRAPOLATION METHODS; QUADRUPOLAR NUCLEI; HIGH-FIELD; SPECTROSCOPY; SIMULATION; COUPLINGS; SPECTRA AB Computational power, speed, and algorithmic complexity are increasing at a continuing rate. As a result, scientific simulations continue to investigate more and more complex systems. Nuclear magnetic resonance (NMR) is no exception. NMR theory and language is extremely well developed, that simulations have become a standard by which experiments are measured. Nowadays, complex computations can be performed on normal workstations and workstation clusters. Basic numerical operations have also become extremely optimized and new computer language paradigms have become implemented. Currently there exists no complete NMR tool kit which uses these newer techniques. This paper describes such a tool kit, BlochLib. BlochLib is designed to be the next generation of NMR simulation packages; however, the basic techniques implemented are applicable to almost any problem. BlochLib enables the user to simulate almost any NMR idea both experimental or theoretical in nature. Both classical and quantum mechanical techniques are included and demonstrated, as well as several powerful user interface tools. The total tool kit and documentation can be found at http://waugh.cchem.berkeley.edu/blochlib/. (C) 2003 Published by Elsevier Science (USA). C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RP Blanton, WB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Mail Stop 66-208,1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 38 TC 31 Z9 32 U1 1 U2 4 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 1090-7807 J9 J MAGN RESON JI J. Magn. Reson. PD JUN PY 2003 VL 162 IS 2 BP 269 EP 283 DI 10.1016/S1090-7807(03)00035-1 PG 15 WC Biochemical Research Methods; Physics, Atomic, Molecular & Chemical; Spectroscopy SC Biochemistry & Molecular Biology; Physics; Spectroscopy GA 697CC UT WOS:000183923800005 PM 12810011 ER PT J AU Antropov, VP AF Antropov, VP TI The exchange coupling and spin waves in metallic magnets: removal of the long-wave approximation SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article DE exchange coupling; spin waves; band theory; Fe; Ni ID FERROMAGNETIC METALS; TRANSITION-METALS; DYNAMICS; TEMPERATURE; IRON AB A well-known connection between the magnetic susceptibility and the effective exchange parameter is analyzed. It is shown that all current computational schemes use a long-wave approximation which is suitable only for localized moments systems. A corresponding smallness parameter is derived in real and reciprocal space. General 'inverse susceptibility' approach is combined with a multiple scattering theory and applied for the studies of elementary metals Fe, Ni and Gd. It is shown how the proposed approach significantly improves the description of the exchange coupling between nearest atoms, the spin wave spectrum at large wave vectors for the itinerant degrees of freedom in metallic magnets. A consistent usage of this method leads to the proper description of magnetic short-range order effects. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Ames Lab, Ames, IA 50011 USA. RP Antropov, VP (reprint author), Ames Lab, Ames, IA 50011 USA. NR 19 TC 39 Z9 39 U1 0 U2 7 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 JUN PY 2003 VL 262 IS 2 BP L192 EP L197 DI 10.1016/S0304-8853(03)00206-3 PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA 684TZ UT WOS:000183223800004 ER PT J AU Tsui, TY Ross, CA Pharr, GM AF Tsui, TY Ross, CA Pharr, GM TI A method for making substrate-independent hardness measurements of soft metallic films on hard substrates by nanoindentation SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID MECHANICAL-PROPERTIES MICROPROBE; SENSING INDENTATION EXPERIMENTS; WEAR-RESISTANT COATINGS; THIN-FILMS; CONTACT AREA; SILICON; ADHESION; ALUMINUM; INDENTER; MODULUS AB A new method for making substrate-independent hardness measurements by nanoindentation techniques that applies to soft metallic films on very hard substrates is presented. The primary issue to be addressed is substrate-induced enhancement of indentation pileup and the ways it influences the indentation contact area. On the basis of experimental observations of soft aluminum films deposited on silicon, glass, and sapphire substrates, an empirical relationship was derived that relates the amount of pileup to the contact depth. From this relationship and the associated experimental observations, a method was developed that allows the intrinsic hardness of the film to be estimated, even when the indenter penetrates through the film into the substrate. The method should prove useful for very thin films (<100 nm) in which it is not possible to make measurements at penetration depths small enough to avoid subtrate effects. C1 Rice Univ, Dept Mat Sci, Houston, TX 77005 USA. MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA. Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Knoxville, TN 37996 USA. RP Tsui, TY (reprint author), Rice Univ, Dept Mat Sci, 6100 S Main St, Houston, TX 77005 USA. NR 27 TC 18 Z9 18 U1 1 U2 8 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD JUN PY 2003 VL 18 IS 6 BP 1383 EP 1391 DI 10.1557/JMR.2003.0190 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA 687KM UT WOS:000183375800015 ER PT J AU Mancinelli, C Jenks, CJ Thiel, PA Gellman, AJ AF Mancinelli, C Jenks, CJ Thiel, PA Gellman, AJ TI Tribological properties of a B2-type Al-Pd-Mn quasicrystal approximant SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID CU-FE; B2-BASED APPROXIMANTS; SURFACE OXIDATION; PHASE-DIAGRAM; FRICTION; INTERFACE; LUBRICATION; COATINGS; ALLOYS AB The tribological properties of a B2-type Al-Pd-Mn quasicrystal approximant were investigated and compared with those of an Al-Pd-Mn icosahedral quasicrystal. The approximant was of the P phase, having a crystalline CsCl-type structure and nominal composition Al(48)Pd(42)Mn(10). Friction coefficients measured in ultrahigh vacuum between a pair of Al(48)Pd(42)Mn(10) samples having truly clean surfaces were found to be twice as high as those reported for the Al(70)Pd(21)Mn(9) quasicrystal. When the surfaces were oxidized by exposure to O(2) or H(2)O, the friction coefficients decreased by roughly a factor of two for both materials but the friction coefficient for the approximant remained roughly twice that of the quasicrystal. The rate of oxidation of the approximant was found to be one order of magnitude higher than that of the quasicrystal. This corroborates findings that suggest that quasicrystals exhibit an inherent resistance to oxidation and corrosion. Vickers hardness measurements show that the quasicrystal is roughly three times as hard as the approximant. C1 Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RP Gellman, AJ (reprint author), Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. EM ag4b@andrew.cmu.edu RI Gellman, Andrew/M-2487-2014 OI Gellman, Andrew/0000-0001-6618-7427 NR 53 TC 22 Z9 22 U1 0 U2 4 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD JUN PY 2003 VL 18 IS 6 BP 1447 EP 1456 DI 10.1557/JMR.2003.0199 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA 687KM UT WOS:000183375800024 ER PT J AU Hsueh, CH Kim, JH Kim, DK AF Hsueh, CH Kim, JH Kim, DK TI Modeling of effects of adhesive interlayers on contact-induced radial cracking in brittle coatings on substrates SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID LAYER STRUCTURES; FRACTURE AB The effects of soft adhesive interlayers on contact-induced radial cracking in brittle coatings on supporting substrates were investigated recently. A semiempirical equation for the critical load to initiate radial cracking was derived, which used three fitting parameters obtained by comparison with the finite element results. An analytical model is derived in the present study to illustrate the effects of adhesive interlayers. This is achieved by adopting the analogy between the coating/substrate system and a plate on an elastic foundation. In the presence of an adhesive interlayer, the interlayer/substrate bilayer is treated as the effective elastic foundation. The effective modulus of foundation for the bilayer is derived, and the solution for coating/interlayer/substrate systems can be obtained from the existing solution for coating/substrate systems by replacing the modulus of foundation. Specific results are calculated for critical loads to initiate radial cracks in silicon coatings bonded by adhesive interlayers of different materials and thicknesses to glass substrates. The present analytical solution provides an alternative other than the existing semiempirical equation in predicting the effects of adhesive interlayers. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea. RP Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. RI Hsueh, Chun-Hway/G-1345-2011; Kim, Do Kyung/C-2039-2011 OI Kim, Do Kyung/0000-0001-9092-9427 NR 16 TC 5 Z9 5 U1 0 U2 4 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA SN 0884-2914 EI 2044-5326 J9 J MATER RES JI J. Mater. Res. PD JUN PY 2003 VL 18 IS 6 BP 1481 EP 1486 DI 10.1557/JMR.2003.0204 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA 687KM UT WOS:000183375800029 ER PT J AU Lessing, PA Wood, HC Zuck, LD AF Lessing, PA Wood, HC Zuck, LD TI Low temperature hydrogen transport using a palladium/copper membrane SO JOURNAL OF MATERIALS SCIENCE LA English DT Article AB Results are presented from low temperature hydrogen permeation experiments using a palladium/copper membrane. Inlet pressure was varied from 5 psig to 180 psig, while temperature was varied from 25 degreesC to 275 degreesC. The palladium/copper membranes exhibited flow stability problems at low temperatures and pressures when using ultra high purity hydrogen. A preconditioning step of high temperatures and inlet pressures of pure hydrogen was necessary to stimulate any substantial permeate flows. After pre-conditioning, results showed zero hydrogen flow when using 3 - 4% hydrogen mixed with helium or argon. It is thought that the inert gas atoms were adsorbed into the membrane surface and thus blocked the hydrogen atom dissolution. When using pure hydrogen at low to moderate temperatures and low pressures, no measurable permeate flow was observed. Also, zero permeate flow was observed at relatively high temperatures (e.g., 150degreesC) and a low inlet pressure (5 psig). The cause of the zero permeate flow, when using pure hydrogen, was attributed to interface control of the permeation process. Interface control could be due to: ( a) insufficient energy to split the hydrogen molecule into hydrogen atoms, or (b) a reversible phase change from beta to alpha of crystals at the near surface. (C) 2003 Kluwer Academic Publishers. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Lessing, PA (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA. NR 6 TC 3 Z9 4 U1 0 U2 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD JUN 1 PY 2003 VL 38 IS 11 BP 2401 EP 2408 DI 10.1023/A:1023996800277 PG 8 WC Materials Science, Multidisciplinary SC Materials Science GA 684HL UT WOS:000183199300014 ER PT J AU Dobrzhinetskaya, LF Green, HW Bozhilov, KN Mitchell, TE Dickerson, RM AF Dobrzhinetskaya, LF Green, HW Bozhilov, KN Mitchell, TE Dickerson, RM TI Crystallization environment of Kazakhstan microdiamond: evidence from nanometric inclusions and mineral associations SO JOURNAL OF METAMORPHIC GEOLOGY LA English DT Article DE COH-fluid; Kazakhstan microdiamond; nanoinclusions; oxides; subduction ID HIGH-TEMPERATURE CONDITIONS; O-H FLUIDS; KOKCHETAV MASSIF; NORTHERN KAZAKSTAN; METAMORPHIC ROCKS; HIGH-PRESSURE; COMPLETE MISCIBILITY; DIAMOND FORMATION; TRACE-ELEMENTS; UPPER-MANTLE AB Nanometric solid inclusions in diamond incorporated in garnet and zircon from felsic gneiss of the Kokchetav massif, Kazakhstan, have been examined utilizing electron microscopy and focused ion beam techniques. Host garnet and zircon contain numerous pockets of multiple inclusions, which consist of 1-3 diamond crystals intergrown with quartz, phengite, phlogopite, albite, K-feldspar, rutile, apatite, titanite, biotite, chlorite and graphite in various combinations. Recalculation of the average chemical composition of the entrapped fluid represented by multiple inclusion pockets indicates that such fluid contained a low wt% of SiO2, suggesting a relatively low-temperature fluid rather than a melt. Transmission electron microscopy revealed that the diamond contains abundant nanocrystalline inclusions of oxides, rare carbonates and silicates. Within the 15 diamond crystals studied, abundant inclusions were found of SiO2, TiO2, Fe-x O-y, Cr-2 O-3, ZrSiO4, and single grains of Th-x O-y, BaSO4, MgCO3, FeCr2 O-4 and a stoichiometric Fe-rich pyroxene. The diversity of trace elements within inclusions of essentially the same stoichiometry suggests that the Kokchetav diamond crystallized from a fluid containing variable amounts of Si, Fe, Ti, Cr, Zr, Ba, Mg and Th and other minor components such as K, Na, P, S, Pb, Zn, Nb, Al, Ca, Cl. Most of the components in crystals included in diamond appear to have their origin in the subducted metasediments, but some of them probably originate from the mantle. It is concluded that Kokchetav diamond most likely crystallized from a COH-rich multicomponent supercritical fluid at a relatively low temperature (hence the apparently low content of rock-forming elements), and that the diversity of major and minor components suggests interactions between subducted metasediments and mantle components. C1 Univ Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA. Univ Calif Riverside, Inst Geophys & Planetary Phys, Riverside, CA 92521 USA. Los Alamos Natl Lab, Div Sci & Technol, Los Alamos, NM 87545 USA. RP Dobrzhinetskaya, LF (reprint author), Univ Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA. NR 68 TC 46 Z9 48 U1 0 U2 2 PU BLACKWELL PUBLISHING INC PI MALDEN PA 350 MAIN ST, MALDEN, MA 02148 USA SN 0263-4929 J9 J METAMORPH GEOL JI J. Metamorph. Geol. PD JUN PY 2003 VL 21 IS 5 BP 425 EP 437 DI 10.1046/j.1525-1314.2003.00452.x PG 13 WC Geology SC Geology GA 688PX UT WOS:000183445500002 ER PT J AU Ingram, JC Bauer, WF Lehman, RM O'Connell, SP Shaw, AD AF Ingram, JC Bauer, WF Lehman, RM O'Connell, SP Shaw, AD TI Detection of fatty acids from intact microorganisms by molecular beam static secondary ion mass spectrometry SO JOURNAL OF MICROBIOLOGICAL METHODS LA English DT Article DE fatty acids; microorganisms; static secondary ion mass spectrometry ID CHEMICAL-IONIZATION; WHOLE BACTERIA; MATRIX; ELECTRON; OXIDE; SOIL AB We report the use of a surface analysis approach, static secondary ion mass spectrometry (SIMS) equipped with a molecular (ReO4-) ion primary beam, to analyze the surface of intact microbial cells. SIMS spectra of 28 microorganisms were compared to fatty acid profiles determined by gas chromatographic analysis of transesterfied fatty acids extracted from the same organisms. The results indicate that surface bombardment using the molecular primary beam cleaved the ester linkage characteristic of bacteria at the glycerophosphate backbone of the phospholipid components of the cell membrane. This cleavage enables direct detection of the fatty acid conjugate base of intact microorganisms by static SIMS. The limit of detection for this approach is approximately 10(7) bacterial cells/cm(2). Multivariate statistical methods were applied in a graded approach to the SIMS microbial data. The results showed that the full data set could initially be statistically grouped based upon major differences in biochemical composition of the cell wall. The gram-positive bacteria were further statistically analyzed, followed by final analysis of a specific bacterial genus that was successfully grouped by species. Additionally, the use of SIMS to detect microbes on mineral surfaces is demonstrated by an analysis of Shewanella oneidensis on crushed hematite. The results of this study provide evidence for the potential of static SIMS to rapidly detect bacterial species based on ion fragments originating from cell membrane lipids directly from sample surfaces. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. Westminister Christian Acad, St Louis, MO 63141 USA. RP Ingram, JC (reprint author), No Arizona Univ, Dept Chem, Box 5698, Flagstaff, AZ 86011 USA. RI Bauer, William/B-8357-2016; OI Bauer, William/0000-0002-7190-9700; Lehman, Michael/0000-0002-3391-3178 NR 29 TC 14 Z9 15 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-7012 J9 J MICROBIOL METH JI J. Microbiol. Methods PD JUN PY 2003 VL 53 IS 3 BP 295 EP 307 DI 10.1016/S0167-7012(02)00236-1 PG 13 WC Biochemical Research Methods; Microbiology SC Biochemistry & Molecular Biology; Microbiology GA 672WF UT WOS:000182545500002 PM 12689707 ER PT J AU Jensen, BD Mutlu, S Miller, S Kurabayashi, K Allen, JJ AF Jensen, BD Mutlu, S Miller, S Kurabayashi, K Allen, JJ TI Shaped comb fingers for tailored electromechanical restoring force SO JOURNAL OF MICROELECTROMECHANICAL SYSTEMS LA English DT Article DE tunable resonators; variable gap electrodes ID RESONATORS; ACTUATORS; SILICON; DESIGN; DRIVE AB Electrostatic comb drives are widely used in micro-electromechanical devices. These comb drives often employ rectangular fingers which produce a stable, constant force output as they engage. This paper explores the use of shapes other than the common rectangular fingers. Such shaped comb fingers allow customized force-displacement response for a variety of applications. In order to simplify analysis and design of shaped fingers, a simple model is developed to predict the force generated by shaped comb fingers. This model is tested using numerical simulation on several different sample shaped comb designs. Finally, the model is further tested, and the use of shaped comb fingers is demonstrated, through the design, fabrication, and testing of tunable resonators which allow both up and down shifts of the resonant frequency. The simulation and testing results demonstrate the usefulness and accuracy of the simple model. Finally, other applications for shaped comb fingers are described, including tunable sensors, low-voltage actuators, multistable actuators, or actuators with linear voltage-displacement behavior. C1 Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA. Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA. MEMX Inc, Albuquerque, NM 87109 USA. Sandia Natl Labs, MEMS Sci & Technol, Albuquerque, NM 87185 USA. RP Jensen, BD (reprint author), Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA. EM bdjensen@umich.edu; smutlu@umich.edu; sam.miller@memx.com; katsuo@umich.edu; jjallen@sandia.gov RI Jensen, Brian/B-3125-2008; Mutlu, Senol/C-6680-2015 OI Mutlu, Senol/0000-0003-4515-5770 NR 20 TC 50 Z9 51 U1 0 U2 7 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1057-7157 J9 J MICROELECTROMECH S JI J. Microelectromech. Syst. PD JUN PY 2003 VL 12 IS 3 BP 373 EP 383 DI 10.1109/JMEMS.2003.809948 PG 11 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Instruments & Instrumentation; Physics, Applied SC Engineering; Science & Technology - Other Topics; Instruments & Instrumentation; Physics GA 687BQ UT WOS:000183356300017 ER PT J AU Wurtz, GA Hranisavljevic, J Wiederrecht, GP AF Wurtz, GA Hranisavljevic, J Wiederrecht, GP TI Photo-initiated energy transfer in nanostructured complexes observed by near-field optical microscopy SO JOURNAL OF MICROSCOPY-OXFORD LA English DT Article DE apertureless near-field optics; fluorescence; metal/J-aggregate complex; metallic nanoparticle; plasmon resonance; radiative/non-radiative relaxation channel ID SILVER NANOPARTICLES AB We report an apertureless near-field optical study on nanostructured objects formed by J-aggregates adsorbed on silver (Ag) nanoparticles. Near-field images reveal that the enhanced near-field from the dressed particle's (DP) resonantly excited plasmon oscillation is efficiently absorbed by the J-aggregates. The sensitivity of the near-field images recorded at the harmonics of the probe vibration frequency suggests that the DP is releasing part of the absorbed energy radiatively upon interaction with the probe. The role of the probe in providing this new radiative relaxation channel is further confirmed as fluorescence from the J-aggregates on the particle is detected on the particle location only. We based the interpretation of our results on the near-field optical response from a bare Ag particle excited at the plasmon resonance as well as on far-field emission and transient absorption experiments. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Wiederrecht, GP (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 10 TC 15 Z9 15 U1 0 U2 2 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 0022-2720 J9 J MICROSC-OXFORD JI J. Microsc.-Oxf. PD JUN PY 2003 VL 210 BP 340 EP 343 DI 10.1046/j.1365-2818.2003.01159.x PN 3 PG 4 WC Microscopy SC Microscopy GA 686EB UT WOS:000183307500029 PM 12787111 ER PT J AU Cordis, GA Turoczi, T Jun, L Morris, JE Maulik, N Stevens, RG Das, DK AF Cordis, GA Turoczi, T Jun, L Morris, JE Maulik, N Stevens, RG Das, DK TI Detection of oxidative stress in mouse hearts effected by HFE mutation and dietary iron content by estimating the dinitrophenylhydrazine derivative of malonaldehyde. SO JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY LA English DT Meeting Abstract CT 25th Annual Meeting of the North American Section of the International-Society-for-Heart-Research CY JUN 28-JUL 01, 2003 CL MYSTIC, CT SP Int Soc Heart Res, N Amer Sect C1 Univ Connecticut, Sch Med, Dept Surg & Med, Farmington, CT 06030 USA. Univ Connecticut, Sch Med, Dept Community Med, Farmington, CT 06030 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2828 EI 1095-8584 J9 J MOL CELL CARDIOL JI J. Mol. Cell. Cardiol. PD JUN PY 2003 VL 35 IS 6 MA P106 BP A46 EP A46 PG 1 WC Cardiac & Cardiovascular Systems; Cell Biology SC Cardiovascular System & Cardiology; Cell Biology GA 692QZ UT WOS:000183672900193 ER PT J AU Turoczi, T Jun, L Cordis, G Morris, JE Maulik, N Stevens, RG Das, DK AF Turoczi, T Jun, L Cordis, G Morris, JE Maulik, N Stevens, RG Das, DK TI HFE mutation and dietary iron content interact to increase ischemia-reperfusion injury of the heart in mice SO JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY LA English DT Meeting Abstract CT 25th Annual Meeting of the North American Section of the International-Society-for-Heart-Research CY JUN 28-JUL 01, 2003 CL MYSTIC, CT SP Int Soc Heart Res, N Amer Sect C1 Univ Connecticut, Sch Med, Dept Surg & Med, Farmington, CT USA. Univ Connecticut, Sch Med, Dept Community Med, Farmington, CT USA. Pacific NW Natl Lab, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2828 EI 1095-8584 J9 J MOL CELL CARDIOL JI J. Mol. Cell. Cardiol. PD JUN PY 2003 VL 35 IS 6 MA P79 BP A39 EP A39 PG 1 WC Cardiac & Cardiovascular Systems; Cell Biology SC Cardiovascular System & Cardiology; Cell Biology GA 692QZ UT WOS:000183672900164 ER PT J AU Liepe, K Hliscs, R Kropp, J Runge, R Knapp, FF Franke, WG AF Liepe, K Hliscs, R Kropp, J Runge, R Knapp, FF Franke, WG TI Dosimetry of (188)re-hydroxyethylidene diphosphonate in human prostate cancer skeletal metastases SO JOURNAL OF NUCLEAR MEDICINE LA English DT Article DE radiation-absorbed dose; kinetics; (188)re-hydroxyethylidene; diphosphonate; bone metastases ID RE-188 HYDROXYETHYLIDENE DIPHOSPHONATE; DETERMINING ABSORBED FRACTIONS; 3-DIMENSIONAL TRANSPORT MODEL; PAINFUL BONE METASTASES; OSSEOUS METASTASES; RADIONUCLIDE THERAPY; RE-186(SN) HEDP; ELECTRONS; GENERATOR; BIODISTRIBUTION AB Re-188-Hydroxyethylidene diphosphonate (Re-188-HEDP) was used in previous studies for the palliative treatment of metastatic bone pain. However, the kinetic and radiation-absorbed doses have not been well documented. Therefore, the aim of this study was to gather dosimetric data for Re-188-HEDP. Methods: Thirteen prostate cancer patients with skeletal involvement were treated with 2,700-3,459 MBq (mean dose, 3,120 MBq) Re-188-HEDP. Patients underwent whole-body scans 3, 20, and 28 h after therapy. The effective half-life, residence time, and radiation-absorbed dose values were calculated for the whole body, bone marrow, kidneys, and bladder as well as for 29 bone metastases. The urinary excretion rate was determined in 6 urine samples of each patient collected over 48 h at 8-h intervals beginning immediately after the administration of Re-188-HEDP. After injection of Re-188-HEDP, blood samples were taken weekly for 6 wk, and platelet and leukocyte counts were performed. Results: The mean effective half-life was 15.9 +/- 3.5 h in bone metastases, 10.9 +/- 2.1 h in the bone marrow, 11.6 +/- 2.1 h in the whole body, 12.7 +/- 2.2 h in the kidneys, and 7.7 +/- 3.4 h in the bladder. The following radiation-absorbed doses were calculated: 3.83 +/- 2.01 mGy/MBq for bone metastases, 0.61 +/- 0.21 mGy/MBq for the bone marrow, 0.07 +/- 0.02 mGy/MBq for the whole body; 0.71 +/- 0.22 mGy/MBq for the kidneys, and 0.99 +/- 0.18 mGy/MBq for the bladder. Re-188-HEDP showed a rapid urinary excretion within the first 8 h after therapy, with 41 % of the Re-188-HEDP administered being excreted. Forty-eight hours after therapy, the excretion rate was 60% +/- 12%. Only 1 patient showed a decrease of platelet count below 100 x 109 counts/L. None of the patients presented with a decrease of leukocyte count below 3.0 x 10(9) counts/L. Conclusion: Re-188-HEDP is an effective radiopharmaceutical used in the palliative treatment of metastatic bone pain. The radiation-absorbed dose is acceptable for bone pain palliation with low doses for the normal bone marrow and the whole body. C1 Univ Hosp Dresden, Dept Nucl Med, D-01307 Dresden, Germany. Oak Ridge Natl Lab, Nucl Med Grp, Oak Ridge, TN USA. RP Liepe, K (reprint author), Univ Hosp Dresden, Dept Nucl Med, Fetscher 74, D-01307 Dresden, Germany. NR 36 TC 35 Z9 43 U1 0 U2 1 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 USA SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD JUN PY 2003 VL 44 IS 6 BP 953 EP 960 PG 8 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA 688GN UT WOS:000183426000026 PM 12791825 ER PT J AU Tomaselli, M Liu, LC Kuhl, T Nortershauser, W Ursescu, D Fritzsche, S AF Tomaselli, M Liu, LC Kuhl, T Nortershauser, W Ursescu, D Fritzsche, S TI Cluster-transformation coefficients for structure and dynamics calculations in n-particle systems: atoms, nuclei and quarks SO JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS LA English DT Article; Proceedings Paper CT Wigner Centennial Conference CY JUL 08-12, 2002 CL PECS, HUNGARY DE n-body problem; highly charged ions; laser spectroscopy; proton polarization ID LITHIUM-LIKE IONS; HYPERFINE-STRUCTURE; HYDROGENLIKE ATOMS; CORRELATION MODEL; ENERGY; PROTON; POLARIZABILITIES AB The structure and dynamics of an n-particle system are described with coupled nonlinear Heisenberg commutator equations where the nonlinear terms are generated by the two-body interaction that excites the reference vacuum via particle-particle and particle-hole excitations. Nonperturbative solutions of the system are obtained with the use of the dynamic linearization approximation and cluster transformation coefficients. The dynamic linearization approximation converts the commutator chain into an eigenvalue problem. The cluster coefficients factorize the matrix elements of the (n) particles or particle-hole systems in terms of the matrix elements of the (n - l)-systems coupled to particle-particle, particle-hole and hole-hole bosons. Group properties of the particle-particle, particle-hole and hole-hole permutation groups simplify the calculation of these coefficients. The particle-particle vacuum excitations generate superconductive diagrams in the dynamics of three-quark systems. Applications of the model to fermionic and bosonic systems are discussed. C1 Gesell Schwerionenforsch Inst Darmstadt, D-64291 Darmstadt, Germany. Los Alamos Natl Lab, T Div, Los Alamos, NM 87545 USA. Univ Kassel, Inst Phys, D-34132 Kassel, Germany. RP Tomaselli, M (reprint author), Gesell Schwerionenforsch Inst Darmstadt, D-64291 Darmstadt, Germany. RI Ursescu, Daniel/F-2216-2010; Kuhl, Thomas/C-2243-2012; Nortershauser, Wilfried/A-6671-2013 OI Ursescu, Daniel/0000-0002-0612-670X; Kuhl, Thomas/0000-0001-6306-4579; Nortershauser, Wilfried/0000-0001-7432-3687 NR 35 TC 2 Z9 2 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1464-4266 J9 J OPT B-QUANTUM S O JI J. Opt. B-Quantum Semicl. Opt. PD JUN PY 2003 VL 5 IS 3 BP S395 EP S401 AR PII S1464-4266(03)58220-9 DI 10.1088/1464-4266/5/3/376 PG 7 WC Optics; Physics, Applied SC Optics; Physics GA 699LY UT WOS:000184059400047 ER PT J AU Volya, A Zelevinsky, V AF Volya, A Zelevinsky, V TI Exploring quantum dynamics in an open many-body system: transition to superradiance SO JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS LA English DT Article; Proceedings Paper CT Wigner Centennial Conference CY JUL 08-12, 2002 CL PECS, HUNGARY DE non-Hermitian Hamiltonian; complex energy; decay width; phase transition; random interaction; overlapping resonances ID DICKE SUPERRADIANCE; MICROWAVE CAVITY; UNBOUND LEVELS; STATES; RESONANCES; DECAY; STATISTICS; MATRICES; ENERGY AB We study the dynamics of a complex open quantum many-body system. The coupling to external degrees of freedom can be viewed as a coupling to a radiation field, to continuum states or to a measuring apparatus. This perturbation is treated in terms of an effective non-Hermitian Hamiltonian. The influence of such coupling on the properties of the many-body dynamics is discussed, with emphasis on new effects related to dynamical segregation of fast and slow decays and the phase transition to Dicke superradiance. Relations to quantum optics, the continuum shell model, the theory of measurement, quantum chaos, percolation theory and quantum reactions are stressed. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. RP Volya, A (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RI Volya, Alexander/I-9457-2012 OI Volya, Alexander/0000-0002-1765-6466 NR 40 TC 8 Z9 8 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1464-4266 J9 J OPT B-QUANTUM S O JI J. Opt. B-Quantum Semicl. Opt. PD JUN PY 2003 VL 5 IS 3 BP S450 EP S456 AR PII S1464-4266(03)58516-0 DI 10.1088/1464-4266/5/3/385 PG 7 WC Optics; Physics, Applied SC Optics; Physics GA 699LY UT WOS:000184059400056 ER PT J AU Volya, A Esbensen, H AF Volya, A Esbensen, H TI Dynamic polarization effects in Coulomb excitation SO JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS LA English DT Article; Proceedings Paper CT Wigner Centennial Conference CY JUL 08-12, 2002 CL PECS, HUNGARY DE Coulomb excitation; harmonic oscillator; squeezed states; dynamic polarization; Barkas effect ID STOPPING-POWER; HARMONIC-OSCILLATOR; PHASE-SPACE; ELECTROMAGNETIC FIELD; CHARGED-PARTICLES; COHERENT STATES; ANTIPROTONS; PROTONS; ATOMS; AREA AB In this paper we discuss the excitation of a quantum harmonic system, such as a particle bound in a harmonic oscillator potential, by means of dipole and quadrupole electric fields, focusing on effects of their interference. We obtain an exact solution to this problem with methods that date back to the ideas of Wigner. We discuss the rich class of dynamic polarization effects that are involved in such excitation processes and which are relevant to stopping theory, and electromagnetic excitation of atomic and nuclear systems. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Volya, A (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RI Volya, Alexander/I-9457-2012 OI Volya, Alexander/0000-0002-1765-6466 NR 35 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1464-4266 J9 J OPT B-QUANTUM S O JI J. Opt. B-Quantum Semicl. Opt. PD JUN PY 2003 VL 5 IS 3 BP S407 EP S412 AR PII S1464-4266(03)57520-6 DI 10.1088/1464-4266/5/3/378 PG 6 WC Optics; Physics, Applied SC Optics; Physics GA 699LY UT WOS:000184059400049 ER PT J AU Wong, CY AF Wong, CY TI Explicit solution of the time evolution of the Wigner function SO JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS LA English DT Article; Proceedings Paper CT Wigner Centennial Conference CY JUL 08-12, 2002 CL PECS, HUNGARY DE Wigner function; time evolution; methods in quantum theory ID CLASSICAL ELECTROMAGNETIC-FIELDS; PHASE-SPACE; MOLECULAR-DYNAMICS; QUANTUM-MECHANICS; SYSTEMS; TOMOGRAPHY; EQUATION; STATES; LIGHT AB Previously, an explicit solution for the time evolution of the Wigner function was presented in terms of auxiliary phase space coordinates which obey simple equations that are analogous with, but not identical to, the classical equations of motion. They can be solved easily, and their solutions can be used to construct the time evolution of the Wigner function. In this paper, the usefulness of this explicit solution is demonstrated by solving a numerical example in which the Wigner function has strong spatial and temporal variations as well as regions with negative values. It is found that the explicit solution gives a correct description of the time evolution of the Wigner function. We examine next the pseudoparticle method which uses classical trajectories to evolve the Wigner function. We find that the lowest-order pseudoparticle approximation reproduces the general features of the time evolution, but there are deviations. We show how these deviations can be systematically reduced by including higher-order correction terms in powers of h(2). C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Wong, CY (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. NR 29 TC 9 Z9 9 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1464-4266 J9 J OPT B-QUANTUM S O JI J. Opt. B-Quantum Semicl. Opt. PD JUN PY 2003 VL 5 IS 3 BP S420 EP S428 AR PII S1464-4266(03)56700-3 DI 10.1088/1464-4266/5/3/381 PG 9 WC Optics; Physics, Applied SC Optics; Physics GA 699LY UT WOS:000184059400052 ER PT J AU Zangar, RC Kocarek, TA Shen, S Bollinger, N Dahn, MS Lee, DW AF Zangar, RC Kocarek, TA Shen, S Bollinger, N Dahn, MS Lee, DW TI Suppression of cytochrome P450 3A protein levels by proteasome inhibitors SO JOURNAL OF PHARMACOLOGY AND EXPERIMENTAL THERAPEUTICS LA English DT Article ID CULTURED HUMAN HEPATOCYTES; RAT HEPATOCYTES; ENDOPLASMIC-RETICULUM; DEGRADATION; EXPRESSION; UBIQUITIN; GLUTATHIONE; PATHWAY; HEMIN; 2E1 AB We have previously reported that CYP3A cross-links with polyubiquitinated proteins in microsomes from nicardipine-treated rats in a process that is distinct from classical polyubiquitination. To further examine the role of the proteasome in CYP3A degradation, we investigated the effects of proteasome inhibitors lactacystin, MG132, proteasome inhibitor 1, and hemin in primary cultures of rat and human hepatocytes. With the exception of hemin, these agents increased the total pool of ubiquitinated proteins in microsomes isolated from rat hepatocytes, indicating that lactacystin, MG132, and proteasome inhibitor 1 effectively inhibited the proteasome in these cells. All four agents caused a reduction in the amount of the major similar to55-kDa CYP3A band, opposite to what would be expected if the ubiquitin-proteasome pathway degraded CYP3A. Only hemin treatment caused an increase in high molecular mass (HMM) CYP3A bands. Because hemin treatment did not alter levels of ubiquitin in CYP3A immunoprecipitates, the HMM CYP3A bands formed in response to hemin treatment clearly were not due to proteasome inhibition. Rather, because hemin treatment also caused an increase in HMM CYP3A in the detergent-insoluble fraction of the 10,000g pellet, the HMM CYP3A seems to represent a large protein complex that is unlikely to primarily represent ubiquitination. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Wayne State Univ, Inst Environm Hlth Sci, Detroit, MI USA. Univ Missouri, Sch Med, Kansas City, MO 64108 USA. RP Zangar, RC (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,MS P7-56, Richland, WA 99352 USA. FU NHLBI NIH HHS [HL50710]; NIDDK NIH HHS [DK54812]; NIEHS NIH HHS [P30-ES06639] NR 21 TC 14 Z9 14 U1 0 U2 0 PU AMER SOC PHARMACOLOGY EXPERIMENTAL THERAPEUTICS PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0022-3565 J9 J PHARMACOL EXP THER JI J. Pharmacol. Exp. Ther. PD JUN PY 2003 VL 305 IS 3 BP 872 EP 879 DI 10.1124/jpet.102.044628 PG 8 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA 680PF UT WOS:000182986000010 PM 12626652 ER PT J AU Radovan, HA Behne, E Zieve, RJ Kim, JS Stewart, GR Kwok, WK Field, RD AF Radovan, HA Behne, E Zieve, RJ Kim, JS Stewart, GR Kwok, WK Field, RD TI Heavy-ion irradiation of UBe13 superconductors SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Article DE superconductors; radiation damage ID COLUMNAR DEFECTS; THORIATED UBE13; LOW-FIELD; PHASE; U1-XTHXBE13; TRANSITION; STATE; UPT3 AB We irradiate the heavy fermion superconductors (U,Th)Be-13 with high-energy heavy ions. Damage from the ions affects both heat capacity and magnetization measurements, although much less dramatically than in other superconductors. From these data and from direct imaging, we conclude that the irradiation does not create the amorphous columnar defects observed in high-temperature superconductors and other materials. We also find that the damage suppresses the two superconducting transitions of U0.97Th0.03Be13 by comparable amounts, unlike their response to other types of defects. (C) 2003 Elsevier Science Ltd. All rights reserved. C1 Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Univ Florida, Dept Phys, Gainesville, FL 32611 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Zieve, RJ (reprint author), Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. NR 30 TC 2 Z9 2 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0022-3697 J9 J PHYS CHEM SOLIDS JI J. Phys. Chem. Solids PD JUN PY 2003 VL 64 IS 6 BP 1015 EP 1020 DI 10.1016/S0022-3697(02)00477-8 PG 6 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA 655NQ UT WOS:000181559300016 ER PT J AU Suzuki, M AF Suzuki, M TI A hyperon as helicity analyser of s quark in B decay SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS LA English DT Article ID LAMBDA(B)->LAMBDA-GAMMA AB We explore how well one can probe the s quark chirality of the fundamental weak interaction of nonleptonic B decay using the spin-analysing property of the A hyperon. We present the prediction of the standard model as quantitatively as possible in a perturbative QCD picture avoiding detailed form-factor calculation involving quark mass corrections. A clean test of chirality will be possible with (B) over bar --> LambdaX when X is an antibaryon or its excited state. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. NR 21 TC 7 Z9 7 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0954-3899 EI 1361-6471 J9 J PHYS G NUCL PARTIC JI J. Phys. G-Nucl. Part. Phys. PD JUN PY 2003 VL 29 IS 6 BP B15 EP B22 AR PII S0954-3899(03)56509-4 DI 10.1088/0954-3899/29/6/702 PG 8 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 696QM UT WOS:000183898300029 ER PT J AU McLarnon, FR AF McLarnon, FR TI Special issue - Selected papers presented at the 11th International Meeting on Lithium Batteries - Monterey, CA, USA, 22-28 June 2002 - Preface SO JOURNAL OF POWER SOURCES LA English DT Editorial Material C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP McLarnon, FR (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 1 EP 1 DI 10.1016/S0378-7753(03)00114-9 PG 1 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600001 ER PT J AU Zaghib, K Song, X Guerfi, A Rioux, R Kinoshita, K AF Zaghib, K Song, X Guerfi, A Rioux, R Kinoshita, K TI Purification process of natural graphite as anode for Li-ion batteries: chemical versus thermal SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium intercalation; natural graphite; chemical; purification; thermal treatment ID PARTICLE-SIZE AB The intercalation of Li ions in natural graphite that was purified by chemical and thermal processes was investigated. A new chemical process was developed that involved a mixed aqueous solution containing 30% H2SO4 and 30% NHxFy heated to 90 degreesC. The results of this process are compared to those obtained by heating the natural graphite from 1500 to 2400 degreesC in an inert environment (thermal process). The first-cycle coulombic efficiency of the purified natural graphite obtained by the chemical process is 91 and 84% after the thermal process at 2400 degreesC. Grinding the natural graphite before or after purification had no significant effect on electrochemical performance at low currents. However, grinding to a very small particle size before purification permitted optimization of the size distribution of the particles, which gives rise to a more homogenous electrode. The impurities in the graphite play a role as microabrasion agents during grinding which enhances its hardness and improves its mechanical properties. Grinding also modifies the particle morphology from a 2- to a 3-D structure (similar in shape to a potato). This potato-shaped natural graphite shows high reversible capacity at high current densities (about 90% at 1 C rate). Our analysis suggests that thermal processing is considerably more expensive than the chemical process to obtain purified natural graphite. (C) 2003 Elsevier Science B.V. All rights reserved. C1 IREQ, Inst Rech, Serv Chim Mat Hydro Quebec, Varennes, PQ J3X 1S1, Canada. Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Zaghib, K (reprint author), IREQ, Inst Rech, Serv Chim Mat Hydro Quebec, 1800 Boul Lionel Boulet, Varennes, PQ J3X 1S1, Canada. NR 9 TC 34 Z9 41 U1 3 U2 24 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 8 EP 15 DI 10.1016/S0378-7753(03)00116-2 PG 8 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600003 ER PT J AU Sandi, G Khalili, NR Lu, WQ Prakash, J AF Sandi, G Khalili, NR Lu, WQ Prakash, J TI Electrochemical performance of carbon materials derived from paper mill sludge SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE thermogravimetric analysis; N-2-adsorption; carbon materials ID ACTIVATED CARBON; IRREVERSIBLE CAPACITY; SURFACE-AREA; BATTERIES; POROSITY; SYSTEMS; GAS AB A pure, high surface area and cost-effective carbon-based material with possible application in electrochemical processes was synthesized from industrial sludge. Surface characterization included N-2-adsorption isotherm data and mathematical models such as the DR equation, and BJH methods. The extent of the purity was assessed from thermogravimetric analysis (TGA). The electrochemical properties, i.e. the potential use as electrode in Li ion batteries, were evaluated using conventional electrochemical testing such as charge/discharge cycling and impedance spectroscopy. The results of the data analysis were promising and indicated that paper mill sludge can be successfully used to produce a pure carbon for potential use in electrochemical applications. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. IIT, Dept Chem & Environm Engn, Chicago, IL 60616 USA. RP Sandi, G (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 22 TC 5 Z9 6 U1 2 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 34 EP 38 DI 10.1016/S0378-7753(03)00120-4 PG 5 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600007 ER PT J AU Vaughey, JT Fransson, L Swinger, HA Edstrom, K Thackeray, MM AF Vaughey, JT Fransson, L Swinger, HA Edstrom, K Thackeray, MM TI Alternative anode materials for lithium-ion batteries: a study of Ag(3)Sb SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CA DE lithium-ion batteries; intermetallic electrodes; anodes; silver antimony ID SITU X-RAY; DIFFRACTION; ELECTRODES; CELLS; TIN; LI AB Silver antimonide, Ag(3)Sb, in which silver and antimony are both electrochemically active toward lithium, has been studied as an anode for lithium-ion batteries. The rate of capacity fade on cycling was monitored as a function of the voltage window, which has provided further information about the causes of capacity fade in intermetallic electrode systems. From the voltage profiles, and by comparison with the behavior of SnSb, InSb and Cu(2)Sb electrodes, the electrochemical reaction of Li/Ag(3)Sb cells was determined to take place in several discrete stages: first, by a displacement reaction in which lithium replaces Ag in the Ag(3)Sb structure in a two-step process between 0.9 and 0.7 V to form Li(3)Sb via Li(2)AgSb; and second, by reaction of lithium with the extruded silver between 0.2 and 0.0 V to form Li(x)Ag compounds (1 less than or equal to x less than or equal to 4). The rate of capacity fade that occurs when cells are cycled between 1.2 and 0.0 V was significantly reduced by limiting the reaction to either: (1) the low voltage region (0.7-0.0 V), which provided a stable capacity of similar to300 mAh/g; or (2) to a wider operating window (1.2-0.1 V, 250 mAh/g), in which the formation of Li(x)Ag phases was suppressed. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Chem Technol, Electrochem Technol Program, Argonne, IL 60439 USA. Uppsala Univ, Dept Chem Mat, Angstrom Lab, S-75121 Uppsala, Sweden. RP Vaughey, JT (reprint author), Argonne Natl Lab, Div Chem Technol, Electrochem Technol Program, Argonne, IL 60439 USA. EM vaughey@cmt.anl.gov OI Vaughey, John/0000-0002-2556-6129; Edstroem, Kristina/0000-0003-4440-2952 NR 20 TC 59 Z9 60 U1 5 U2 16 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 64 EP 68 DI 10.1016/S0378-7753(03)00126-5 PG 5 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600013 ER PT J AU Guerfi, A Sevigny, S Lagace, M Hovington, P Kinoshita, K Zaghib, K AF Guerfi, A Sevigny, S Lagace, M Hovington, P Kinoshita, K Zaghib, K TI Nano-particle Li(4)Ti(5)O(12) spinel as electrode for electrochemical generators SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CA DE electrochemical generators; solid-state reaction; zero strain; nano particles; Li(4)Ti(5)O(12) ID NEGATIVE ELECTRODE; SOLID-STATE; BATTERIES AB Li(4)Ti(5)O(12) was obtained by solid-state reaction of a ternary precursor mixture, TiO(2), Li(2)CO(3) and carbon. The influences of the reaction time, temperature and mixing method on the electrochemical performance of Li(4)Ti(5)O(12) were investigated. Electrochemical measurements and XRD diffraction characterization were used to determine the reversible capacity and TiO(2) residue in the final powder, respectively. Between 1.2 and 2.0 V versus Li, a reversible capacity as high as 165 mAh/g at 7.3 mA/g was obtained. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Inst Rech Hydro Quebec, Varennes, PQ J3X 1S1, Canada. Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Zaghib, K (reprint author), Inst Rech Hydro Quebec, 1800 Boul Lionel Boulet, Varennes, PQ J3X 1S1, Canada. EM karimz@ireq.ca NR 14 TC 155 Z9 169 U1 1 U2 18 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 88 EP 94 DI 10.1016/S0378-7753(03)00131-9 PG 7 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600017 ER PT J AU Song, SW Striebel, KA Song, XY Cairns, EJ AF Song, SW Striebel, KA Song, XY Cairns, EJ TI Amorphous and nanocrystalline Mg2Si thin-film electrodes SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE nanocrystalline; thin-film electrodes; pulsed laser deposition ID MECHANISM; INSERTION AB Mg2Si films, prepared by pulsed laser deposition (PLD), were amorphous, as prepared, and nanocrystalline following annealing. Their micro-structure and electrochemical characteristics were studied by high-resolution transmission electron microscopy (HRTEM) and electrochemical cycling against lithium. HRTEM analysis revealed that some excess Si was present in the films. The more amorphous thinner film exhibited excellent cyclability. However, when the film becomes crystalline, the irreversible capacity loss was more significant during the initial cycling and after similar to50 cycles. Interpretations of the superior stability of the amorphous films are examined. Published by Elsevier Science B.V. C1 Ernest Orlando Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RP Striebel, KA (reprint author), Ernest Orlando Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RI Cairns, Elton/E-8873-2012 OI Cairns, Elton/0000-0002-1179-7591 NR 7 TC 29 Z9 34 U1 3 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 110 EP 112 DI 10.1016/S0378-7753(03)00135-6 PG 3 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600021 ER PT J AU Johnson, CS Kim, JS Kropf, AJ Kahaian, AJ Vaughey, JT Thackeray, MM AF Johnson, CS Kim, JS Kropf, AJ Kahaian, AJ Vaughey, JT Thackeray, MM TI Structural and electrochemical evaluation of (1-x)Li2TiO3 center dot(x)LiMn0.5Ni0.5O2 electrodes for lithium batteries SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium batteries; layered electrodes; lithium-nickel-manganese oxides ID ION BATTERIES; CATHODE; LI2NIO2; PHASE AB X-ray diffraction (XRD), in situ X-ray absorption spectroscopy (XAS), and chemical lithiation experiments were used to evaluate the phases associated with the electrochemistry of the mixed-metal layered LiMn0.5M0.5O2 oxide electrode. These results, along with coin-cell cycling data from the substituted layered (1 - x)Li2TiO3.(x)LiMn0.5Ni0.5O2 composite oxide electrode are reported. The cycling behavior of Li/0.05Li(2)TiO(3).0.95LiMn(0.5)Ni(0.5)O(2) (x = 0.95) cells over an extended voltage window (4.3 or 4.6-1.25 V) under moderate current rate have yielded rechargeable capacities above 250 mAh/g. These large capacities and structural data suggest that both the composite (1 - x)Li2TiO3.(x)LiMn0.5Ni0.5O2 and LiMn0.5Ni0.5O2 (standard) layered electrodes operate predominantly off two-electron redox couples, Ni4+/Ni2+ and Mn4+/Mn2+ approximately between 4.6 and 2.0 V, and between 2.0 and 1.0 V versus metallic Li, respectively. The LiMn0.5Ni0.5O2 layered oxide is shown to reversibly react chemically or electrochemically with Li to form a stable, but air-sensitive dilithium compound, Li2Mn0.5Ni0.5O2 (Li2MO2; M = metal ion) that can be indexed to the space group P-3m1. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Chem Technol, Electrochem Technol & Basic Sci Program, Argonne, IL 60439 USA. RP Johnson, CS (reprint author), Argonne Natl Lab, Div Chem Technol, Electrochem Technol & Basic Sci Program, 9700 S Cass Ave, Argonne, IL 60439 USA. EM johnsoncs@cmt.anl.gov RI ID, MRCAT/G-7586-2011 NR 17 TC 26 Z9 28 U1 5 U2 70 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 139 EP 144 DI 10.1016/S0378-7753(03)00143-5 PG 6 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600028 ER PT J AU Eriksson, TA Doeff, MM AF Eriksson, TA Doeff, MM TI A study of layered lithium manganese oxide cathode materials SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE cathode; lithium battery; manganese oxide ID O2 STRUCTURE LI-2/3O-2; ELECTRODE MATERIALS; ION-EXCHANGE; BATTERIES; CAPACITY; LI; MN AB Substituted layered sodium manganese oxide bronzes with the P2 structure were prepared by glycine-nitrate combustion synthesis. The Na in the as-prepared materials could be completely ion-exchanged for Li under mild conditions. All lithium manganese oxide compounds obtained after ion-exchange have O2 stacking of the layers. Cyclic voltammetry and stepped potential experiments on lithium cells containing these materials show that the main redox reaction around 3.1 V is a diffusion-controlled process and is completely reversible. O2-Li-0.6[Al(0.1)Mn(0.85)square(0.05)]O-2 and O2-Li-0.6[Ni(0.1)Mn(0.85)square(0.05)]O-2 are particularly promising as cathode materials in lithium cells because of the high reversible discharge capacities (180 mAh/g). (C) 2003 Elsevier Science B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. RP Doeff, MM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. OI Doeff, Marca/0000-0002-2148-8047 NR 19 TC 14 Z9 15 U1 3 U2 21 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 145 EP 149 DI 10.1016/S0378-7753(03)00144-7 PG 5 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600029 ER PT J AU Kang, SH Amine, K AF Kang, SH Amine, K TI Comparative study of Li(Ni0.5-xMn0.5-xM2x')O-2 (M' = Mg, Al, Co, Ni, Ti; x=0, 0.025) cathode materials for rechargeable lithium batteries SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium-ion rechargeable battery; cathode materials; lithium manganese nickel oxides; layered structure ID ION BATTERIES AB We have investigated the effect of dopants on the electrochemical and thermal properties of layered Li(Ni0.5-xMn0.5-xM2x') materials (M' = Mg, Al, Co, Ni, Ti; x = 0, 0.025) that were prepared using a manganese-nickel hydroxide precursor. Li(Ni0.5Mn0.5)O-2 exhibited discharge capacities of ca. 120 and 150 mAh/g at 2.8-4.3 and 2.8-4.6 V, respectively, with slight capacity fades; the addition of 5 mol% Al, Co, Ni, and Ti increased discharge capacity by 10-30% and improved capacity retention. X-ray photoelectron spectroscopy data suggested that Ni and Mn exist as Ni2+ and Mn4+ so that only Ni is electrochemically active in the layered structure. Differential scanning calorimetry (DSC) data showed that exothermic reactions of Li-y(Ni0.5-xMn0.5-xM2x')O-2 charged to 4.3 V versus Li started at higher temperatures (270-290 degreesC) than LiNiO2-based cathode materials (e.g. 200 degreesC for LiNi0.8CO0.2O2), which indicates that the thermal stability of Li(Ni0.5-xMn0.5-xM2x') is superior to that of LiNiO2-based cathode materials. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Chem Technol, Electrochem Technol Program, Argonne, IL 60439 USA. RP Kang, SH (reprint author), Argonne Natl Lab, Div Chem Technol, Electrochem Technol Program, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Kang, Sun-Ho/E-7570-2010; Amine, Khalil/K-9344-2013 NR 9 TC 70 Z9 80 U1 4 U2 56 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 150 EP 155 DI 10.1016/S0378-77539(03)00145-9 PG 6 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600030 ER PT J AU Belharouak, I Tsukamoto, H Amine, K AF Belharouak, I Tsukamoto, H Amine, K TI LiNi0.5Co0.5O2 as a long-lived positive active material for lithium-ion batteries SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE LiNi0.5Co0.5O2; medical device; cyclability; aging ID ELECTROCHEMICAL PROPERTIES; CATHODE MATERIAL AB LiNi0.5Co0.5O2 layered material could be a possible cathode material for advanced lithium-ion batteries in applications such as medical devices. The material was prepared by the co-precipitation method, which leads to a highly stoichiometric and homogeneous powder with a desirable particle size. It has shown reasonable cycling stability at a C/2 rate up to 100 cycles, and is expected to be much more stable at lower rates and capable of providing the needed capacity. We also showed that the use of lithium fluoroalkyl-phosphate Li[PF3(C2F5)(3)] salt-based electrolyte significantly improves the calendar life of the battery. Aging tests have been performed under severe conditions (storage at 50 degreesC and 4.1 V) clearly show a huge capacity loss for the conventional cathode LiNi0.8Co0.2O2 while LiNi0.5Co0.5O2 electrode exhibits a limited capacity fading. Finally, because it has less nickel content, differential scanning calorimetry (DSC) measurements confirm that LiNi0.5Co0.5O2 is much safe than the LiNi0.8Co0.2O2 cathode. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Chem Technol, Argonne, IL 60439 USA. Quallion LLC, Sylmar, CA 91342 USA. RP Belharouak, I (reprint author), Argonne Natl Lab, Div Chem Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Amine, Khalil/K-9344-2013; OI Belharouak, Ilias/0000-0002-3985-0278 NR 11 TC 25 Z9 25 U1 2 U2 16 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 175 EP 177 DI 10.1016/S0378-7753(03)00174-5 PG 3 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600035 ER PT J AU Moore, GJ Johnson, CS Thackeray, MM AF Moore, GJ Johnson, CS Thackeray, MM TI The electrochemical behavior of xLiNiO(2)center dot (1-x)Li2RuO3 and Li2Ru1-yZryO3 electrodes in lithium cells SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium cell; electrode; Li2RuO3; lithium ruthenate ID CATHODE MATERIALS; ION BATTERIES; LI2-XRUO3 AB Cathode materials derived from Li2RuO3, Li2ZrO3 and LiNiO2 have been evaluated in lithium cells at room temperature as part of an ongoing study of composite xLiMO(2).(1 - x)Li2M'O-3 electrodes. Our results confirm previous reports that two lithium ions can be initially extracted from Li2RuO3, but that only one lithium ion can be cycled between 4.4 and 2.8 V with a rechargeable capacity of approximately 200 mAh/g. Extending the voltage window to 4.6-1.4 V increases the reversible capacity of the Li2RuO3 electrode significantly, to nearly 300 mAh/g. Similar capacities are obtained from a Zr-substituted electrode, Li2Ru1 -yZryO3 for y = 0.1, with excellent cycling stability. A composite electrode, 0.7LiNiO(2).0.3Li(2)RuO(3), provides a steady 150 mAh/g when cycled between 4.6 and 2.7 V. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Electrochem Technol Program, Div Chem Technol, Argonne, IL 60439 USA. RP Moore, GJ (reprint author), Argonne Natl Lab, Electrochem Technol Program, Div Chem Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 13 TC 16 Z9 16 U1 6 U2 57 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 216 EP 220 DI 10.1016/S0378-7753(03)00184-8 PG 5 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600043 ER PT J AU Richardson, TJ AF Richardson, TJ TI Phosphate-stabilized lithium intercalation compounds SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium secondary batteries; active materials ID ALLUAUDITE STRUCTURE TYPE; CRYSTAL-CHEMISTRY; LIFEPO4; BATTERIES; FILLOWITE; CAPACITY; CATHODES; NASICON AB Four manganese and iron phosphates with alluaudite or fillowite structures have been prepared by solid state reactions: Na2FeMn2(PO4)(3), LiNaFeMn2(PO4)(3), NaFe3(PO4)(3), and Na2Mn3(PO4)(3). LiNa2-xFeMn2(PO4)(3) with x close to 2 was prepared from Na2FeMn2(PO4)(3) by molten salt ion exchange. These materials are similar in stoichiometry to the phospho-olivines LiFe(Mn)PO4, but have a more complex structure that can accommodate mixed transition metal oxidation states. They are of interest as candidates for lithium battery cathodes because of their expected higher electronic conductivity, high intercalant ion mobility, and ease of preparation. Their performance as intercalation electrodes in non-aqueous lithium cells was, however, poor. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Ernest Orlando Lawrence Berkley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Richardson, TJ (reprint author), Ernest Orlando Lawrence Berkley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. NR 20 TC 31 Z9 32 U1 3 U2 30 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 262 EP 265 DI 10.1016/S0378-7753(03)00244-1 PG 4 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600051 ER PT J AU Jang, YI Dudney, NJ Blom, DA Allard, LF AF Jang, YI Dudney, NJ Blom, DA Allard, LF TI Electrochemical and electron microscopic characterization of thin-film LiCoO2 cathodes under high-voltage cycling conditions SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE thin-film batteries; lithium cobalt oxide; lipon; transmission electron microscopy; nanocrystalline cathode ID RECHARGEABLE LITHIUM BATTERIES; LIXCOO2; INTERCALATION AB Thin-film LiCoO2 batteries using the Lipon electrolyte exhibit excellent cycleability up to 4.4 V. With the enhanced voltage limit for repeatable cycling, the thin-film cathode delivers a specific capacity of 170 mAh/g, which is 22% higher than that for previous LiCoO2 cathodes cycled to 4.2 V No evidence of grain fracture was detected by transmission electron microscopy (TEM) in the cathode layer after cycling to 4.4 V. When cycled to >4.4 V, capacity fades and cell resistance increases more rapidly, attributed to the onset of a phase transition at >4.4 V. Fracture of grains was observed by TEM in the cathode layer after cycling to 5 V Nanocrystalline films show better cycleability to 5 V than films with a larger grain size. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Jang, YI (reprint author), Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RI Dudney, Nancy/I-6361-2016 OI Dudney, Nancy/0000-0001-7729-6178 NR 14 TC 20 Z9 20 U1 5 U2 24 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 295 EP 299 DI 10.1016/S0378-7753(03)00160-5 PG 5 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600057 ER PT J AU Dudney, NJ Jang, YI AF Dudney, NJ Jang, YI TI Analysis of thin-film lithium batteries with cathodes of 50 nm to 4 mu m thick LiCoO2 SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE thin-film battery; microbattery; lithium battery; LiCoO2; lipon; lithium diffusion ID DIFFUSION; LIXCOO2; INTERCALATION AB Discharge properties of more than 40 Li-LiCoO2 solid-state thin-film batteries with cathode film thickness from 50 nm to 4 mum have been examined with respect to the lithium diffusion in the cathode. For all but the thinnest cathodes or very low current densities, the discharge capacity from 4.2 to 3.0 V is limited by the lithium diffusivity in LixCoO2 and the ultimate formation of a resistive layer at the interface as x approaches 1.0. Measurements of the equilibrium open circuit potential and ac impedance upon deep discharge support this model. Promoting a higher diffusion for the 0.96 < x < 1.0 phase would greatly enhance the energy achievable by the thin-film batteries. The lithium diffusion rate in the cathode films is observed to be sensitive to subtle variations in the synthesis conditions when crystallized at temperatures <700 degreesC. (C) 2003 Elsevier Science B.V All rights reserved. C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Dudney, NJ (reprint author), Oak Ridge Natl Lab, Condensed Matter Sci Div, POB 2008, Oak Ridge, TN 37831 USA. RI Dudney, Nancy/I-6361-2016 OI Dudney, Nancy/0000-0001-7729-6178 NR 15 TC 61 Z9 65 U1 10 U2 69 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 300 EP 304 DI 10.1016/S0378-7753(03)00162-9 PG 5 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600058 ER PT J AU Liu, P Lee, SH Tracy, CE Turner, JA AF Liu, P Lee, SH Tracy, CE Turner, JA TI Stable cycling of thin-film vanadium oxide electrodes between 4 and 0 V in lithium batteries SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE vanadium oxide; Raman spectra; lithium insertion; cycling stability; anode material ID ELECTROCHEMICAL PROPERTIES; LI; REACTIVITY; VANADATES AB Vanadium oxide prepared by plasma-enhanced chemical vapor deposition was cycled in different voltage ranges in a lithium battery. Electrochemical cycling results show a surprisingly low irreversibility during the first discharge and good stability for close to 1000 cycles between 4 and 0 V Raman spectroscopy results indicate that a major structural transformation takes place when the films are cycled down to 1.8 V, after which the structural features remain intact even after cycling to 0 V. Degradation of the electrode only occurs after extended cycling. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Liu, P (reprint author), Natl Renewable Energy Lab, 1617 Cold Blvd, Golden, CO 80401 USA. RI Lee, Sehee/A-5989-2011; Liu, Ping/I-5615-2012 NR 16 TC 7 Z9 7 U1 1 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 305 EP 309 DI 10.1016/S0378-7753(03)00164-2 PG 5 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600059 ER PT J AU Sloop, SE Kerr, JB Kinoshita, K AF Sloop, SE Kerr, JB Kinoshita, K TI The role of Li-ion battery electrolyte reactivity in performance decline and self-discharge SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium-ion batteries; carbonate electrolyte; Lewis acid salts; polymerization; CO2 generation and reduction; capacity and power fade ID LOW PROTON AVAILABILITY; CARBON-DIOXIDE; ELECTROCHEMICAL REDUCTION; ETHYLENE CARBONATE; MECHANISM; LITHIUM; POLYMERIZATION; CALENDAR; CELLS; MEDIA AB The purpose of this paper is to report on the reactivity of PF5 and EC/linear carbonates to understand the thermal and electrochemical decomposition reactions of LiPF6 in carbonate solvents and how these reactions lead to the formation of products that impact the performance of lithium-ion batteries. The behavior of other salts such as LiBF4 and LiTFSI are also examined. Solid LiPF6 is in equilibrium with solid LiF and PF5 gas. In the bulk electrolyte, the equilibrium can move toward products as PF5 reacts with the solvents. The Lewis acid property of the PF5 induces a ring-opening polymerization of the EC that is present in the electrolyte and can lead to PEO-like polymers. The polymerization is endothermic until 170 degreesC and is driven by CO2 evolution. Above this temperature the polymerization becomes exothermic and leads to a violent decomposition. The PEO-like polymers also react with the PF5 to yield further products that may be soluble in the electrolyte or participate in solid electrolyte interphase (SEI) formation in real cells. GPC analysis of the heated electrolytes indicates the presence of material with M-w up to 5000. More details on the polymerization reactions and further reactions with PF5 are reported. Transesterification and polymer products are observed in the electrolytes of cycled and aged Li-ion cells. Formation of polymer materials which are further crosslinked by reaction with acidic species leads to degradation of the transport properties of the electrolyte in the composite electrodes with the accompanying loss of power and energy density. Generation of CO2 in lithium-ion cells leads to saturation of the electrolyte and cessation of the polymerization reaction. However, CO2 is easily reduced at the anode to oxalate, carbonate and CO. The carbonate contributes to the SEI layer while the oxalate is sufficiently soluble to reach the cathode to be re-oxidized to CO2 thus resulting in a shuttle mechanism that explains reversible self-discharge. Irreversible reduction of CO2 to carbonate and CO partially accounts for irreversible self-discharge. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Kerr, JB (reprint author), Lawrence Berkeley Natl Lab, MS 62 203 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM jbkerr@lbl.gov NR 23 TC 169 Z9 174 U1 21 U2 159 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 330 EP 337 DI 10.1016/S0378-7753(03)00149-6 PG 8 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600064 ER PT J AU Jow, TR Ding, MS Xu, K Zhang, SS Allen, JL Amine, K Henriksen, GL AF Jow, TR Ding, MS Xu, K Zhang, SS Allen, JL Amine, K Henriksen, GL TI Nonaqueous electrolytes for wide-temperature-range operation of Li-ion cells SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE nonaqueous electrolytes; lithium salts; Li-ion batteries; high temperature; low temperature; solid electrolyte interface (SET); conductivity; glass transition temperature ID BATTERIES; LITHIUM; PERFORMANCE; CARBONATE; LIPF6; SALT; CONDUCTIVITY; LIBOB AB Nonaqueous electrolytes play a key role in extending the operating temperature range of Li-ion batteries. In developing electrolytes for wide temperature operations, we adopted an approach of starting with thermally stable lithium tetrafluoroborate (LiBF4) and lithium bis(oxalato)borate (LiB(C2O4)(2), or LiBOB) salts. We have demonstrated that the capacity of Li-ion cells fades much slower in electrolytes using LiBF4 or LiBOB than in electrolytes using LiPF6. For low temperatures applications, suitable solvent systems for LiBF4 and LiBOB were explored. We found that the charge transfer resistance (R-ct) is smaller in Li-ion cells in electrolytes based on LiBF4 in selected solvent systems than that based on LiPF6 and results in better capacity utilization at low temperatures. We also found that the electrolytes based on LiBOB in PC-based solvent system would allow Li-ion cells with graphite anode to be cycled. By comparing the properties of LiBF4 and LiPF6 in the propylene carbonate and diethyl carbonate (PC-DEC) solvent system, we found that it is possible to formulate proper solvent mixtures for enhanced conductivity for LiBF4 and LiBOB salts at low temperatures. It is concluded that nonaqueous electrolytes for wide-temperature-range operations of Li-ion cells are achievable. Published by Elsevier Science B.V. C1 Army Res Lab, Adelphi, MD 20783 USA. Argonne Natl Lab, Div Chem Technol, Electrochem Tech Program, Argonne, IL 60439 USA. RP Jow, TR (reprint author), Army Res Lab, Adelphi, MD 20783 USA. RI Zhang, Sheng/A-4456-2012; Xu, Kang/C-6054-2013; Amine, Khalil/K-9344-2013 OI Zhang, Sheng/0000-0003-4435-4110; NR 22 TC 31 Z9 34 U1 5 U2 45 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 343 EP 348 DI 10.1016/S0378-7753(03)00153-8 PG 6 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600066 ER PT J AU Hyung, YE Vissers, DR Amine, K AF Hyung, YE Vissers, DR Amine, K TI Flame-retardant additives for lithium-ion batteries SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE flame retardant; high power battery; safety; ARC ID ELECTROLYTES AB To enhance the resistance of lithium-ion battery components to ignition and to reduce the flammability of the electrolyte with minimal effect on performance, we added flame-retardant additives to the electrolyte. The flame retardants were selected from a group of organic phosphate compounds, triphenylphosphate (TPP) and tributylphosphate (TBP), to provide superior thermal safety in lithium-ion cells at the fully charged state. The cycling characteristics of the lithium-ion cells containing flame-retardant additives were found to be similar or superior to the cells that contained no additives. Horizontal burning tests of electrolytes were carried out in a flame test chamber referenced by Underwriters Laboratories (UL) test standard 94 (UL 94) and ASTM D4986-98 to evaluate the electrolyes' flammability characteristics. The thermal stability characteristics of the electrodes and electrolytes with and without flame-retardant additives were investigated by accelerating rate calorimetry (ARC). Negative electrode samples with electrolytes containing flame-retardant additives revealed less heat generation and higher-onset decomposition temperatures. The results disclose that the thermal safety of lithium-ion cells can be improved by incorporating small amounts of suitable additives such as triphenylphosphate and tributylphosphate to the electrolyte. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Chem Technol, Argonne, IL 60439 USA. RP Hyung, YE (reprint author), Argonne Natl Lab, Div Chem Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Amine, Khalil/K-9344-2013 NR 6 TC 95 Z9 104 U1 4 U2 38 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 383 EP 387 DI 10.1016/S0378-7753(03)00225-8 PG 5 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600072 ER PT J AU Oh, B Vissers, D Zhang, Z West, R Tsukamoto, H Amine, K AF Oh, B Vissers, D Zhang, Z West, R Tsukamoto, H Amine, K TI New interpenetrating network type poly(siloxane-g-ethylene oxide) polymer electrolyte for lithium battery SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE poly(siloxane-g-ethylene oxide); interpenetrating network; solid polymer electrolyte ID POLYPHOSPHAZENES; CONDUCTIVITY; PERCHLORATE; SILOXANE AB We fabricated an interpenetrating network type solid polymer electrolyte with a promising mono-comb type poly(siloxane-g-ethylene oxide) for lithium rechargeable battery. The ionic conductivity of the network polymer electrolyte was closed to 10(-4) S/cm at near room temperature. Initial cycling result from LiNi0.8Co0.2O2/polymer electrolyte/lithium metal cell shows excellent cycling characteristics with no capacity fade in a solid electrolyte system. The new polysiloxane polymer electrolyte could be a promising system for large batteries that necessitate long life and inherent safety such as batteries for electric vehicle applications. (C) 2003 Published by Elsevier Science B.V. C1 Argonne Natl Lab, CMT Div, Argonne, IL 60439 USA. Univ Wisconsin, Dept Chem, Madison, WI 53706 USA. Quallion, LLC, Sylmar, CA 91342 USA. RP Oh, B (reprint author), Argonne Natl Lab, CMT Div, 9700 S Cass Ave,Bldg 205, Argonne, IL 60439 USA. RI Amine, Khalil/K-9344-2013 NR 16 TC 64 Z9 66 U1 2 U2 23 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 442 EP 447 DI 10.1016/S0378-7753(03)00187-3 PG 6 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600083 ER PT J AU Sandi, G Carrado, KA Joachin, H Lu, W Prakash, J AF Sandi, G Carrado, KA Joachin, H Lu, W Prakash, J TI Polymer nanocomposites for lithium battery applications SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE PEO; SLH; nanocomposite ID LAYERED SILICATE NANOCOMPOSITES; MELT INTERCALATION AB A series of polymer-clay nanocomposites have been synthesized, characterized, and electrochemically tested as possible candidates for polymer electrolytes in lithium ion cells. Only cations are mobile in these materials, rather than both cations and anions, leading to a higher conductivity. The nanocomposites are based on synthetic lithium hectorite (SLH) and different mass ratios of polyethylene oxide (PEO). Transparent films with excellent mechanical strength are obtained with conductivity that is comparable to more traditional polymer electrolytes made with added lithium salts. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. IIT, Dept Chem & Environm Engn, Chicago, IL 60616 USA. RP Sandi, G (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 11 TC 55 Z9 57 U1 1 U2 15 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 492 EP 496 DI 10.1016/S0378-7753(03)00272-6 PG 5 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600093 ER PT J AU Abraham, DP Liu, J Chen, CH Hyung, YE Stoll, M Elsen, N MacLaren, S Twesten, R Haasch, R Sammann, E Petrov, I Amine, K Henriksen, G AF Abraham, DP Liu, J Chen, CH Hyung, YE Stoll, M Elsen, N MacLaren, S Twesten, R Haasch, R Sammann, E Petrov, I Amine, K Henriksen, G TI Diagnosis of power fade mechanisms in high-power lithium-ion cells SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE calendar-life; chromatography; microscopy; spectroscopy ID BATTERIES AB Hybrid electric vehicles (HEV) need long-lived high-power batteries as energy storage devices. Batteries based on lithium-ion technology can meet the high-power goals but have been unable to meet HEV calendar-life requirements. As part of the US Department of Energy's Advanced Technology Development (ATD) Program, diagnostic studies are being conducted on 18650-type lithium-ion cells that were subjected to accelerated aging tests at temperatures ranging from 40 to 70 degreesC. This article summarizes data obtained by gas chromatography, liquid chromatography, electron microscopy, X-ray spectroscopy and electrochemical techniques, and identifies cell components that are responsible for the observed impedance rise and power fade. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Argonne Natl Lab, Div Chem Technol, Argonne, IL 60439 USA. Univ Illinois, Ctr Microanal Mat, Urbana, IL 61801 USA. RP Abraham, DP (reprint author), Argonne Natl Lab, Div Chem Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. RI MacLaren, Scott/A-5075-2009; Chen, Chunhua/F-5897-2010; Amine, Khalil/K-9344-2013; Petrov, Ivan/D-4910-2011 OI Petrov, Ivan/0000-0002-2955-4897 NR 7 TC 72 Z9 73 U1 3 U2 36 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 511 EP 516 DI 10.1016/S0378-7753(03)00275-1 PG 6 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600096 ER PT J AU Kostecki, R McLarnon, F AF Kostecki, R McLarnon, F TI Microprobe study of the effect of Li intercalation on the structure of graphite SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE Li intercalation; graphite anode; carbon disordering; solid electrolyte interphase (SEI) ID ELEVATED-TEMPERATURE; RAMAN-SPECTRA; ION BATTERIES; IN-SITU; PERFORMANCE; ELECTRODES; CAPACITY; CARBONS AB The structural stability of graphite electrodes in Li-ion cells, which were cycled at room temperature and 60 degreesC was investigated. We observed gradual structural degradation of the graphite, which was most pronounced on the electrode surface but also extended into the bulk of the electrode. Graphite particles close to the Cu current collector remained almost unchanged, whereas those close to the electrode/electrolyte interface suffered significant structural damage. Structural degradation of the graphite led to an increased anode surface reactivity vs. the electrolyte. A thick layer of inorganic products from side reactions was observed on the disordered carbon areas of the anode. (C) 2003 Elsevier Science B.V All rights reserved. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Kostecki, R (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 21 TC 87 Z9 87 U1 3 U2 39 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 550 EP 554 DI 10.1016/S0378-7753(03)00287-8 PG 5 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600102 ER PT J AU Limthongkul, P Jang, YI Dudney, NJ Chiang, YM AF Limthongkul, P Jang, YI Dudney, NJ Chiang, YM TI Electrochemically-driven solid-state amorphization in lithium-metal anodes SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium ion rechargeable batteries; lithium alloy anodes; metal anodes; amorphous phase; silicon; thermodynamics ID NEGATIVE ELECTRODE MATERIALS; ION-BATTERIES; UNIVERSAL CRITERION; GLASS-FORMATION; ALLOY; STORAGE; SILICON; TEMPERATURE; SYSTEMS; OXIDE AB As lithiated-metal alloys such as Li-Si or Li-Sn are of great interest as high energy density anodes for Li-ion rechargeable batteries, a fundamental understanding on how the metals behave upon lithiation is important. X-ray diffraction and HREM experiments in this work reveal that the crystallization of equilibrium inter-metallic compounds (e.g. Li-Si) is inhibited during lithiation at room temperature, and that formation of highly lithiated glass instead occurs. This glass is shown to be metastable with respect to the equilibrium crystalline phases. We show that the mechanism of electrochemical alloying is electrochemically-driven solid-state amorphization (ESA), a process closely analogous to the diffusive solid-state amorphization (SSA) of thin films. Experimental results on the diffusive reaction of Li and Si bilayer films support the proposed mechanism. (C) 2003 Elsevier Science B.V. All rights reserved. C1 MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Chiang, YM (reprint author), MIT, Dept Mat Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA. RI Dudney, Nancy/I-6361-2016 OI Dudney, Nancy/0000-0001-7729-6178 NR 28 TC 124 Z9 128 U1 7 U2 94 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 604 EP 609 DI 10.1016/S0378-7753(03)00303-3 PG 6 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600112 ER PT J AU Yoon, WS Kim, N Yang, XQ McBreen, J Grey, CP AF Yoon, WS Kim, N Yang, XQ McBreen, J Grey, CP TI Li-6 MAS NMR and in situ X-ray studies of lithium nickel manganese oxides SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE Li-6 MAS NMR; in situ XRD; XAS; lithium nickel manganese oxide; battery ID CATHODE MATERIALS; LOCAL-STRUCTURE; ION BATTERIES; DIFFRACTION; LIXMN2O4 AB In situ XRD and Li-6 MAS NMR spectroscopy have been carried out during the first charge process for the layered cathode material Li[Li1/9Ni3/9Mn5/9]O-2. In situ XRD results showed that the c-parameters of the Li[Li1/9Ni3/9Mn5/9]O-2 material increase only slightly at the end of charge. The Mn and Ni K-edge EXAFS results revealed that this compound contains localized clusters resembling the local environments found in Li2MnO3 and lithium nickel oxide. The Li-6 MAS NMR results showed the presence of Li in the Ni2+/Mn4+ layers, in addition to the expected sites for Li in the lithium layers. All the Li ions in the transition metal layers are removed on the first charge, leaving residual lithium ions in the lithium layers. (C) 2003 Elsevier Science B.V. All rights reserved. C1 SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Grey, CP (reprint author), SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. RI Yoon, Won-Sub/H-2343-2011 NR 9 TC 43 Z9 46 U1 7 U2 42 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 649 EP 653 DI 10.1016/S0378-7753(03)00195-2 PG 5 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600120 ER PT J AU Yoon, WS Chung, KY Oh, KH Kim, KB AF Yoon, WS Chung, KY Oh, KH Kim, KB TI Changes in electronic structure of the electrochemically Li-ion deintercalated LiMn2O4 system investigated by soft X-ray absorption spectroscopy SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE soft X-ray absorption spectroscopy; Li1-xMn2O4; lithium rechargeable batteries; XAS ID ELECTROSTATIC SPRAY DEPOSITION; POHANG LIGHT-SOURCE; LA1-XSRXMNO3; CATHODE; 2.66-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-3.00; PHOTOEMISSION; CAMNOX AB The electronic structure of the electrochemically Li-ion deintercalated Li1-xMn2O4 system has been investigated for various Li compositions using soft X-ray absorption spectroscopy (XAS) for oxygen K-edge and Mn L-II,L-III-edge. To get reasonably good XAS spectra for the electrochemically Li-ion deintercalated Li1-xMn2O4 system, we made a binder free LiMn2O4 film electrode using electrostatic spray deposition (ESD) technique. From the Mn L-II,L-III-edge XAS, it is found that the peak shifts to higher energy with the Li-ion deintercalation and this is due to the increase of the average oxidation state of the Mn ion. From the oxygen K-edge XAS, the Li-ion deintercalation gives rise to a gradual increase in pre-edge peak intensity but mostly does not effect its peak shape. (C) 2003 Published by Elsevier Science B.V. C1 Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. Yonsei Univ, Div Engn & Mat Sci, Seoul 120749, South Korea. RP Yoon, WS (reprint author), Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. RI Yoon, Won-Sub/H-2343-2011; Chung, Kyung Yoon/E-4646-2011 OI Chung, Kyung Yoon/0000-0002-1273-746X NR 19 TC 19 Z9 20 U1 1 U2 21 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 706 EP 709 DI 10.1016/S0378-7753(03)00221-0 PG 4 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600131 ER PT J AU Nagasubramanian, G AF Nagasubramanian, G TI Comparison of the thermal and electrochemical properties of LiPF6 and LiN(SO2C2F5)(2) salts in organic electrolytes SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE LiBETI; organic electrolyte; impedance; cycling ID LI-ION CELLS AB Thermal and electrochemical properties of LiPF6 and LiN(SO2C2F5)(2), known as LiBETI, are compared in binary mixtures of ethylene carbonate (EC) and ethyl methyl carbonate (EMC). Thermal stability of these electrolytes was tested between 50 and 120 degreesC at 10 degreesC intervals. The electrolytes were kept at temperature for 1 week and every other day they were taken out of the oven and checked visually for any discoloration. Visual inspection showed discoloration of the LiPF6-containing electrolyte even at 60 degreesC (straw brown to dark brown at 120 degreesC) while the electrolyte containing LiBETI showed no or very little discoloration even at 120 degreesC. In lithium-ion "Tee" cells the electrolyte with LiBETI cycled equally well or better than the electrolyte containing LiPF6 at room temperature. Tee cells containing LiBETI showed lower cathode impedance than and comparable anode impedance to the cells containing electrolytes with LiPF6. In a full cell the electrodes performed equally well. (C) 2003 Elsevier Science B.V. All rights reserved. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Nagasubramanian, G (reprint author), Sandia Natl Labs, 2521 Lithium Battery R&D, Albuquerque, NM 87185 USA. NR 7 TC 12 Z9 12 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 811 EP 814 DI 10.1016/S0378-7753(03)00246-5 PG 4 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600152 ER PT J AU Newman, J Thomas, KE Hafezi, H Wheeler, DR AF Newman, J Thomas, KE Hafezi, H Wheeler, DR TI Modeling of lithium-ion batteries SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium battery; model; transference number; side reactions; heat of mixing; thermal model; conductivity; molecular dynamics; diffusion coefficient ID MOLECULAR-DYNAMICS; CONDUCTIVITY; ELECTROLYTES; ELECTRODES; DIFFUSION; SOLVENTS; SYSTEMS AB After reviewing the basic modeling framework for simulating battery behavior, three examples relating to mass-transfer effects are presented. Side reactions at the lithium electrode can change the surface concentration of lithium ions, introducing error into measurements of the cell potential as a function of bulk electrolyte concentration (concentration-cell measurements). This error introduced by a continuous side reaction is carried over into calculations of the transference number from the galvanostatic polarization method. Concentration gradients formed during passage of current are associated with a heat-of-mixing effect, which is the cause of heat generation during relaxation after cessation of the current. Finally, molecular dynamics simulations show that the decrease in conductivity with increasing salt concentration in liquid carbonate electrolytes is caused by ion association. (C) 2003 Published by Elsevier Science B.V. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Energy & Environm Technol Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RP Newman, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Energy & Environm Technol Div, Berkeley, CA 94720 USA. RI Newman, John/B-8650-2008; Wheeler, Dean/G-5820-2013 OI Newman, John/0000-0002-9267-4525; NR 25 TC 103 Z9 107 U1 11 U2 113 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 838 EP 843 DI 10.1016/S0378-7753(03)00282-9 PG 6 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600157 ER PT J AU Thomas, KE Newman, J AF Thomas, KE Newman, J TI Heats of mixing and of entropy in porous insertion electrodes SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE thermal model; entropy; heat of mixing ID GENERAL ENERGY-BALANCE; BATTERY SYSTEMS; PHASE-DIAGRAM; LIXCOO2 AB Heat is produced after interruption of the current because of relaxation of concentration gradients in electrochemical systems. This heat of relaxation is termed heat of mixing. Two methods, one computational and one analytic approximation, for computing the heat of mixing are presented. In general, the magnitude of the heat of mixing will be small in materials with transport properties sufficiently high to provide acceptable battery performance, with the possible exception of heat of mixing within the insertion particles if the particle radius is large. In insertion materials, such as lithium insertion electrodes, the entropy of reaction may vary substantially with state of charge. The entropy of reaction accounts for a reversible heat effect which may be of the same order of magnitude as the resistive heating. Measurements for the entropy of reaction as a function of state of charge in LiCoO2, LiNi0.8Co0.2O2, and LiC6 are presented. (C) 2003 Published by Elsevier Science B.V. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Energy & Environm Technol Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RP Newman, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Energy & Environm Technol Div, Berkeley, CA 94720 USA. RI Newman, John/B-8650-2008 OI Newman, John/0000-0002-9267-4525 NR 15 TC 62 Z9 63 U1 1 U2 26 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 844 EP 849 DI 10.1016/S0378-7753(03)00283-0 PG 6 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600158 ER PT J AU Wright, RB Christophersen, JP Motloch, CG Belt, JR Ho, CD Battaglia, VS Barnes, JA Duong, TQ Sutula, RA AF Wright, RB Christophersen, JP Motloch, CG Belt, JR Ho, CD Battaglia, VS Barnes, JA Duong, TQ Sutula, RA TI Power fade and capacity fade resulting from cycle-life testing of Advanced Technology Development Program lithium-ion batteries SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium-ion batteries; battery cycle-life; battery power; power fade; battery capacity; capacity fade AB This paper presents the test results and analysis of the power and capacity fade resulting from the cycle-life testing using PNGV (now referred to as FreedomCAR) test protocols at 25 and 45 degreesC of 18650-size Li-ion batteries developed by the US Department of Energy sponsored Advanced Technology Development (ATD) Program. Two cell chemistries were studied, a Baseline chemistry that had a cathode composition of LiNi0.8Co0.15Al0.05O2 with binders, that was cycle-life tested at 25 and 45 degreesC, and a Variant C chemistry with a cathode composition of LiNi0.8Co0.10Al0.10O2 with binders, that was tested only at 45 degreesC. The 300 Wh power, and % power fade were determined as a function of test time, i.e. the number of test cycles for up to 44 weeks (369,600 test cycles) for the Baseline cells, and for 24 weeks (201,600 test cycles) for the Variant C cells. The C/1 and C/25 discharge capacity and capacity fade were also determined during the course of these studies. The results of this study indicate that the 300 Wh power for the Baseline cells tested at 25 degreesC (up to 44 weeks of testing) decreased as a linear function of test time. The % power fade for these cells increased as a linear function of test time. The Baseline cells tested at 45 degreesC (up to 44 weeks of testing) displayed a decrease in their power proportional to the square root of the test time, with a faster rate of decrease of the power occurring at similar to28 weeks of testing. The % power fade for these cells also increased as the square root of the test time, and exhibited an increase in the % power fade rate at similar to28 weeks of testing. The 45 degreesC tested Baseline cells' power decreased, and their % power fade increased at a greater rate than the 25 degreesC tested Baseline cells. The power fade was greater for the Variant C cells. The power of the Variant C cells (tested at 45 degreesC) decreased as the square root of the test time, and their % power fade was also found to be a function of the square root of the test time (up to 24 weeks of testing), i.e. the rate of decrease in the power and the increase in the % power fade rate was greater for the Variant C cells than for the Baseline cells also tested at 45 degreesC. The C/1 and C/25 Ah capacities of the Baseline cells tested at 25 and 45 degreesC were determined to be a function of the square root of the cycle time (i.e. number of test cycles) for test times up to 44 weeks. The capacity fade was greater at 45 degreesC than at 25 degreesC. Similarly, the C/1 and C/25 charge capacities of the Variant C cells were found to be a function of the square root of the test time (up to 24 weeks of testing). The C/1 and C/25 charge capacities decreased as a function of test time and the rate of decrease was smaller for the Variant C cells as compared to the Baseline cells over comparable test times (24 weeks). Published by Elsevier Science B.V. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. Argonne Natl Lab, Argonne, IL 60439 USA. US DOE, Washington, DC USA. RP Wright, RB (reprint author), Idaho Natl Engn & Environm Lab, PBO 1625,MS-3830, Idaho Falls, ID 83415 USA. NR 8 TC 63 Z9 64 U1 7 U2 58 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 865 EP 869 DI 10.1016/S0378-7753(03)00190-3 PG 5 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600162 ER PT J AU Jungst, RG Nagasubramanian, G Case, HL Liaw, BY Urbina, A Paez, TL Doughty, DH AF Jungst, RG Nagasubramanian, G Case, HL Liaw, BY Urbina, A Paez, TL Doughty, DH TI Accelerated calendar and pulse life analysis of lithium-ion cells SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium-ion cell; inductive modeling; artificial neural networks AB Sandia National Laboratories has been studying calendar and pulse discharge, life, of prototype high-power lithium-ion cells as part of the Advanced Technology Development (ATD) Program. One of the goals of ATD is to establish validated accelerated life test protocols for lithium-ion cells in the hybrid electric vehicle application. In order to accomplish this, aging experiments have been conducted on 18650-size cells containing a chemistry representative of these high-power designs. Loss of power and capacity are accompanied by increasing interfacial impedance at the cathode. These relationships are consistent within a given state-of-charge (SOC) over the range of storage temperatures and times. Inductive models have been used to construct detailed descriptions of the relationships between power fade and aging time and to relate power fade, capacity loss and impedance rise. These models can interpolate among the different experimental conditions and can also describe the error surface when fitting life prediction models to the data. Published by Elsevier Science B.V. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Jungst, RG (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 7 TC 50 Z9 52 U1 2 U2 36 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 870 EP 873 DI 10.1016/S0378-7753(03)00193-9 PG 4 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600163 ER PT J AU Liaw, BY Roth, EP Jungst, RG Nagasubramanian, G Case, HL Doughty, DH AF Liaw, BY Roth, EP Jungst, RG Nagasubramanian, G Case, HL Doughty, DH TI Correlation of Arrhenius behaviors in power and capacity fades with cell impedance and heat generation in cylindrical lithium-ion cells SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium-ion battery; LixNi0.8Co0.15Al0.05O2 cathode; accelerated life tests; arrhenius plots; activation energy AB A series of cylindrical 18650 lithium-ion cells with an MAG-10\1.2 M LiPF6 ethylene carbonate (EC):ethyl methyl carbonate (EMC) (w:w = 3:7)\LixNi0.8Co0.15Al0.05O2 configuration were made and tested for power-assist hybrid electric vehicle (HEV) applications under various aging conditions of temperature and state-of-charge (SOC). The cells were intermittently characterized for changes in power capability, rate capacity, and impedance as aging progressed. The changes of these properties with temperature, as depicted by Arrhenius equations, were analyzed. We found that the degradation in power and capacity fade seems to relate to the impedance increase in the cell. The degradation follows a multi-stage process. The initial stage of degradation has an activation energy of the order of 50-55 kJ/mol, as derived from power fade and C-1 capacity fade measured at C/1 rate. In addition, microcalorimetry was performed on two separate unaged cells at 80% SOC at various temperatures to measure static heat generation in the cells. We found that the static heat generation has an activation energy of the order of 48-55 U/mol, similar to those derived from power and C-1 capacity fade. The correspondence in the magnitude of the activation energy suggests that the power and C-1 capacity fades were related to the changes of the impedance in the cells, most likely via the same fading mechanism. The fading mechanism seemed to be related to the static heat generation of the cell. (C) 2003 Published by Elsevier Science B.V. C1 Sandia Natl Labs, Lithium Battery R&D Dept, Albuquerque, NM 87185 USA. RP Doughty, DH (reprint author), Sandia Natl Labs, Lithium Battery R&D Dept, POB 5800,MS-0613, Albuquerque, NM 87185 USA. NR 3 TC 59 Z9 63 U1 2 U2 46 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 874 EP 886 DI 10.1016/S0378-7753(03)00196-4 PG 13 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600164 ER PT J AU Shim, J Striebel, KA AF Shim, J Striebel, KA TI Effect of electrode density on cycle performance and irreversible capacity loss for natural graphite anode in lithium-ion batteries SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 11th International Meeting on Lithium Batteries CY JUN 24-28, 2002 CL MONTEREY, CALIFORNIA DE lithium-ion battery; natural graphite; anode ID ELECTROCHEMICAL PERFORMANCE; BRAZILIAN GRAPHITE; SURFACE-CHEMISTRY; PARTICLE-SIZE; LI; POROSITY AB The effect of electrode thickness and density for unpressed and pressed natural graphite electrodes were studied using electrochemical characterization. Pressing the graphite electrode decreased the reversible capacity and the irreversible capacity loss (ICL) during formation. As electrode density increased, the capacity retention at high rate increased until 0.9 g/cm(3), and then decreased. The cycle performances of the pressed graphite electrodes were more stable than the unpressed one. Pressing graphite electrode affected on its electrochemical characterization such as ICL, high rate cycling and cycle performance. (C) 2003 Published by Elsevier Science B.V. C1 Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Striebel, KA (reprint author), Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. NR 13 TC 37 Z9 38 U1 7 U2 27 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD JUN 1 PY 2003 VL 119 SI SI BP 934 EP 937 DI 10.1016/S0378-7753(03)00235-0 PG 4 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 694XC UT WOS:000183799600175 ER EF