FN Thomson Reuters Web of Science™ VR 1.0 PT J AU HARVEY, WF HOFFMAN, JM BLISS, JL BRAKE, RJ AF HARVEY, WF HOFFMAN, JM BLISS, JL BRAKE, RJ TI PERSONNEL NEUTRON DOSIMETRY IMPROVEMENTS AT LOS-ALAMOS-NATIONAL-LABORATORY SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT 10TH INTERNATIONAL CONF ON SOLID STATE DOSIMETRY CY JUL 13-17, 1992 CL WASHINGTON, DC SP NIH, US DOE, INT SENSOR TECHNOL, LANDAUER, NUCL TECHNOL PUBL, SCI APPL INT, SIEMENS GAMMASON, SOLON TECHNOL, VICTOREEN AB Methods are being investigated to improve neutron dosimetry at Los Alamos National Laboratory (LANL) using the etched track dosemeter CR-39. Specifically, use of CR-39 for dynamic environments, typically encountered at the LANL Plutonium Facility, is shown to be a superior method for personnel neutron dosimetry when compared to the currently used TLD system. The results of glovebox experiments simulating hydrogenous shielding used at LANL, temporal variations of neutron correction factors used at the Plutonium Facility, trial implementation at this facility and preliminary neutron spectroscopy measurements are presented and compared to reference dosimetry measurements. The results confirm that use of a TLD system in a facility implementing hydrogenous shielding requires frequent field recalibration. When such correction factors are not re-evaluated frequently, or are maintained at pre-shielding levels, significant (i.e. 2-to 3-fold) overestimation of the neutron dose equivalent can occur. RP HARVEY, WF (reprint author), LOS ALAMOS NATL LAB,HLTH PHYS POLICY & PROGRAMS GRP,HS-12,LOS ALAMOS,NM 87545, USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU NUCLEAR TECHNOLOGY PUBL PI ASHFORD PA PO BOX 7, ASHFORD, KENT, ENGLAND TN23 1YW SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 1993 VL 47 IS 1-4 BP 391 EP 395 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 LN648 UT WOS:A1993LN64800083 ER PT J AU MINCHER, BJ ZAIDI, MK AF MINCHER, BJ ZAIDI, MK TI CALIBRATION OF FAR-WEST TECHNOLOGY (FWT-60) RADIOCHROMIC DYE DOSIMETERS SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT 10TH INTERNATIONAL CONF ON SOLID STATE DOSIMETRY CY JUL 13-17, 1992 CL WASHINGTON, DC SP NIH, US DOE, INT SENSOR TECHNOL, LANDAUER, NUCL TECHNOL PUBL, SCI APPL INT, SIEMENS GAMMASON, SOLON TECHNOL, VICTOREEN AB Radiochromatic dye dosimetry was used to measure kilogray doses absorbed hy various liquid samples during gamma ray exposure in a spent nuclear fuel pool. The source of nuclear fuel was the Advanced Test Reactor (ATR) at the Idaho National Engineering Laboratory (INEL). Calibrations were performed using a Co-60 source and were run on bare dosemeters, as well as on dosemeters which were mocked to simulate the samples. These dosemeters were prepared as a dye-impregnated nylon film and are commercially available. When exposed to gamma ray doses of 0.5 to 200 kGy, a colour change occurs which has an optical density proportional to absorbed dose. The difference in the calibration curves demonstrates the importance of irradiation of dosemeters under conditions as close to the actual samples as possible. Since these dosemeters could not be immersed directly in the organic solutions of interest, they were sandwiched between layers of Lucite and stainless steel. This simulated the conditions inside an irradiated sample and provides a practical method of measuring absorbed doses. The reproducibility of measurements using the radiochromic dye dosemeters is also shown. RP MINCHER, BJ (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. RI Mincher, Bruce/C-7758-2017 NR 0 TC 6 Z9 6 U1 0 U2 0 PU NUCLEAR TECHNOLOGY PUBL PI ASHFORD PA PO BOX 7, ASHFORD, KENT, ENGLAND TN23 1YW SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 1993 VL 47 IS 1-4 BP 571 EP 573 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 LN648 UT WOS:A1993LN64800120 ER PT J AU LUCAS, JN COX, AB MCLEAN, J AF LUCAS, JN COX, AB MCLEAN, J TI HUMAN-CHROMOSOME PAINTING PROBES USED TO MEASURE CHROMOSOME TRANSLOCATIONS IN NONHUMAN-PRIMATES - EXTRAPOLATIONS FROM MONKEY TO MAN SO RADIATION PROTECTION DOSIMETRY LA English DT Article AB Chromosome painting with a probe specific for human chromosome 4 was used to 'paint' monkey chromosomes in order to measure the persistence of translocations in peripheral blood lymphocytes of a rhesus monkey exposed to ionising radiation more than 25 years ago. The human probe painted the entire length of two large rhesus and cynomolgus monkey chromosomes with no cross hybridisation to other chromosomes, facilitating rapid detection of chromosome translocations in monkeys. The translocation frequency measured in one monkey was significantly higher than that for unirradiated animals. The ability to use human probes to obtain cytogenetic data from Macaca species irradiated years previously or exposed to chemical clastogens makes this primate genus an excellent model for studying genetic damage. RP LUCAS, JN (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94551, USA. NR 0 TC 9 Z9 9 U1 0 U2 0 PU NUCLEAR TECHNOLOGY PUBL PI ASHFORD PA PO BOX 7, ASHFORD, KENT, ENGLAND TN23 1YW SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 1993 VL 46 IS 4 BP 253 EP 256 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 LM029 UT WOS:A1993LM02900005 ER PT B AU JOHNSON, JR STANSBURY, PS AF JOHNSON, JR STANSBURY, PS GP ORG ECON COOPERAT & DEV, NUCL ENERGY AGCY TI IMPLICATIONS OF SCIENTIFIC AND DEVELOPMENTS FOR RADIATION PROTECTION IN THE NEXT DECADE SO RADIATION PROTECTION ON THE THRESHOLD OF THE 21ST CENTURY: PROCEEDINGS OF AN NEA WORKSHOP LA English DT Proceedings Paper CT Workshop on Radiation Protection Toward the Turn of the Century CY JAN 11-13, 1993 CL PARIS, FRANCE SP ORG ECON COOPERAT & DEV, NUCL ENERGY AGCY C1 BATTELLE MEM INST,PACIFIC NW LABS,DEPT HLTH PHYS,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NUCLEAR ENERGY AGENCY OECD PI PARIS 75775 PA 2 RUE ANDRE PASCAL, CEDEX 16 PARIS 75775, FRANCE BN 92-64-03971-6 PY 1993 BP 187 EP 196 PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA BA51L UT WOS:A1993BA51L00012 ER PT B AU FRY, RJM AF FRY, RJM GP ORG ECON COOPERAT & DEV, NUCL ENERGY AGCY TI THE RADIATION PROTECTION PROBLEMS OF HIGH-ALTITUDE AND SPACE-FLIGHT SO RADIATION PROTECTION ON THE THRESHOLD OF THE 21ST CENTURY: PROCEEDINGS OF AN NEA WORKSHOP LA English DT Proceedings Paper CT Workshop on Radiation Protection Toward the Turn of the Century CY JAN 11-13, 1993 CL PARIS, FRANCE SP ORG ECON COOPERAT & DEV, NUCL ENERGY AGCY C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NUCLEAR ENERGY AGENCY OECD PI PARIS 75775 PA 2 RUE ANDRE PASCAL, CEDEX 16 PARIS 75775, FRANCE BN 92-64-03971-6 PY 1993 BP 285 EP 298 PG 14 WC Nuclear Science & Technology SC Nuclear Science & Technology GA BA51L UT WOS:A1993BA51L00018 ER PT J AU NGUYEN, T BROWNELL, GL HOLDEN, SA KAHL, S MIURA, M TEICHER, BA AF NGUYEN, T BROWNELL, GL HOLDEN, SA KAHL, S MIURA, M TEICHER, BA TI SUBCELLULAR-DISTRIBUTION OF VARIOUS BORON-COMPOUNDS AND IMPLICATIONS FOR THEIR EFFICACY IN BORON NEUTRON-CAPTURE THERAPY BY MONTE-CARLO SIMULATIONS SO RADIATION RESEARCH LA English DT Article ID INVITRO; AGENTS; CELLS C1 HARVARD UNIV,SCH MED,DANA FARBER CANC INST,44 BINNEY ST,BOSTON,MA 02115. MIT,DEPT NUCL ENGN,CAMBRIDGE,MA 02139. MIT,WHITAKER COLL,CAMBRIDGE,MA 02139. UNIV CALIF SAN FRANCISCO,SCH PHARM,SAN FRANCISCO,CA 94143. BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. FU NCI NIH HHS [R01-CA36508, R01-CA47379] NR 21 TC 35 Z9 36 U1 0 U2 0 PU RADIATION RESEARCH SOC PI OAK BROOK PA 2021 SPRING RD, STE 600, OAK BROOK, IL 60521 SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD JAN PY 1993 VL 133 IS 1 BP 33 EP 40 DI 10.2307/3578254 PG 8 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA KK623 UT WOS:A1993KK62300005 PM 8434111 ER PT J AU LITTLEFIELD, LG JOINER, EE COLYER, SP SALLAM, F FROME, EL AF LITTLEFIELD, LG JOINER, EE COLYER, SP SALLAM, F FROME, EL TI CONCENTRATION-DEPENDENT PROTECTION AGAINST X-RAY-INDUCED CHROMOSOME-ABERRATIONS IN HUMAN-LYMPHOCYTES BY THE AMINOTHIOL WR-1065 SO RADIATION RESEARCH LA English DT Article ID CO-60 GAMMA-RAY; MAMMALIAN-CELLS; DOSE-RESPONSE; V79 CELLS; IONIZING-RADIATION; STRAND BREAKS; DNA DAMAGE; WR-2721; RADIOPROTECTION; MICRONUCLEI C1 AIN SHAMS UNIV,CAIRO,EGYPT. OAK RIDGE NATL LAB,OAK RIDGE,TN. RP LITTLEFIELD, LG (reprint author), OAK RIDGE INST SCI & EDUC,POB 117,OAK RIDGE,TN 37831, USA. FU NCI NIH HHS [5 R01 CA51388-02] NR 45 TC 35 Z9 36 U1 0 U2 0 PU RADIATION RESEARCH SOC PI OAK BROOK PA 2021 SPRING RD, STE 600, OAK BROOK, IL 60521 SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD JAN PY 1993 VL 133 IS 1 BP 88 EP 93 DI 10.2307/3578261 PG 6 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA KK623 UT WOS:A1993KK62300012 PM 8434118 ER PT J AU PLATT, AM ANDERSON, D AF PLATT, AM ANDERSON, D TI UNTITLED SO RADIOACTIVE WASTE MANAGEMENT AND ENVIRONMENTAL RESTORATION LA English DT Editorial Material RP PLATT, AM (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU HARWOOD ACAD PUBL GMBH PI READING PA C/O STBS LTD, PO BOX 90, READING, BERKS, ENGLAND RG1 8JL SN 0739-5876 J9 RADIOACT WASTE MANAG JI Radioact. Waste Manage. Environ. Restor. PY 1993 VL 17 IS 3-4 BP R3 EP R3 PG 1 WC Engineering, Environmental; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA ND667 UT WOS:A1993ND66700001 ER PT J AU ALBERTO, R HERRMANN, WA BRYAN, JC SCHUBIGER, PA BAUMGARTNER, F MIHALIOS, D AF ALBERTO, R HERRMANN, WA BRYAN, JC SCHUBIGER, PA BAUMGARTNER, F MIHALIOS, D TI NEW ORGANOMETALLIC TECHNETIUM COMPLEXES IN HIGH AND LOW OXIDATION-STATES SO RADIOCHIMICA ACTA LA English DT Article; Proceedings Paper CT Topical Symposium on the Behavior and Utilization of Technetium CY MAR 18-20, 1993 CL SENDAI, JAPAN SP TOHOKU UNIV SENDAI, CHEM DEPT DE CH3TCO3; OXIDATION CATALYSIS; CARBONYLATION; TC(I) AND RE(I)-CLUSTER; TRIDENTATE LIGANDS; ISOCARBONYL ID MAIN-GROUP ELEMENTS; TRANSITION-METALS; MULTIPLE BONDS; LIGANDS; REACTIVITY; COMPOUND AB Synthesis and characterization of the first organometallic Tc(VII) complex CH3TcO3 is described. It behaves differently to CH3ReO3 concerning reactions with alkenes and with aromatic amine bases. Furthermore we present the synthesis and structure of the first organometallic cluster of Tc(I) Na[Tc-3(CO)(9)(mu(3)-OCH3)(mu(2)-OCH3)(3)] With a cuban-like structure. The cluster act as a crown ether with high stability towards sodium. In the crystal the different cluster units are linked via an isocarbonyl bond. The cluster proved to be a useful educt for subsequent substitution reactions with tridentate ligands. Carbonylation of TBA[TcO4] under 1 aim CO finally gave in quantitative yield, the very versatile educt mer-TcCl(CO)(3)[P(C6H5)(3)](2) which readily undergoes substitutions with several tridentate ligands. C1 TECH UNIV MUNICH,INST ANORGAN CHEM,D-85748 GARCHING,GERMANY. LOS ALAMOS NATL LAB,INC 4,LOS ALAMOS,NM 87545. RP ALBERTO, R (reprint author), PAUL SCHERRER INST,DIV RADIOPHARM,CH-5323 VILLIGEN,SWITZERLAND. RI Herrmann, Wolfgang/A-3588-2010 NR 33 TC 5 Z9 5 U1 0 U2 4 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 63 SI SI BP 153 EP 161 PG 9 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA MT324 UT WOS:A1993MT32400030 ER PT J AU FRICKE, B JOHNSON, E RIVERA, GM AF FRICKE, B JOHNSON, E RIVERA, GM TI IONIZATION-POTENTIALS AND RADII OF ATOMS AND IONS OF ELEMENT-105 (UNNILPENTIUM) AND IONS OF TANTALUM DERIVED FROM MULTICONFIGURATION DIRAC-FOCK CALCULATIONS SO RADIOCHIMICA ACTA LA English DT Article DE ELEMENT-105; IONIZATION POTENTIALS; MULTICONFIGURATION RELATIVISTIC DIRAC-FOCK CALCULATIONS; STANDARD ELECTRODE POTENTIALS; GROUP-5B ELEMENTS AB Multiconfiguration relativistic Dirac-Fock (MCDF) values were calculated for the first five ionization potentials of element 105 (unnilpentium) and of the other group 5b elements (V, Nb, and Ta). Some of these ionization potentials in electron volts (eV) with uncertainties are: 105(0), 7.4+/-0.4; 105(1+), 16.3+/-0.2; 105(2+), 24.3+/-0.2; 105(3+), 34.9+/-0.5; and 105(4+), 44.9+/-0.1. Ionization potentials for Ta(1+), Ta(2+), and Ta(3+) were also calculated. Accurate experimental values for these ionization potentials are not available. Ionic radii are presented for the 2+, 3+, 4+, and 5+ ions of element 105 and for the +2 ions of vanadium and niobium. These radii for vanadium and niobium are not available elsewhere. The ionization potentials and ionic radii obtained are used to determine some standard electrode potentials for element 105. Born-Haber cycles and a form of the Born equation for the Gibbs free energy of hydration of ions were used to calculate the standard electrode potentials. C1 ISIDRO A SANCHEZ HIGH SCH,LUQUILLO,PR 00773. OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. RP FRICKE, B (reprint author), UNIV KASSEL,DEPT PHYS,W-3500 KASSEL,GERMANY. NR 27 TC 45 Z9 45 U1 0 U2 5 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 62 IS 1-2 BP 17 EP 25 PG 9 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA MJ674 UT WOS:A1993MJ67400003 ER PT J AU GIBSON, JK AF GIBSON, JK TI MASS-SPECTROMETRIC IDENTIFICATION OF GASEOUS POTASSIUM AND CESIUM PERTECHNETATES AND BIMETALLIC TECHNETIUM-RHENIUM OXIDE DIMERS SO RADIOCHIMICA ACTA LA English DT Article DE POTASSIUM PERTECHNETATE; CESIUM PERTECHNETATE; TECHNETIUM-RHENIUM OXIDE; TECHNETIUM VAPORIZATION AB Mass spectrometry has been used to characterize the gaseous species produced at high temperatures in a Knudsen cell reactor. Condensed samples incorporating technetium and/or rhenium with potassium and/or cesium were studied under vacuum or low oxygen pressures at temperatures up to 900-degrees-C. Among the technetium-containing species identified were KTcO4, (KTcO4)2 and CsTcO4. Inclusion of rhenium in some of the samples allowed for direct comparison of the high-temperature chemistry of technetium with that of its 5d-series homolog; although fundamentally similar, significant differences were noted. In addition to the alkali pertechnetates of primary interest, the novel bimetallic oxide dimers, TcReO5 and TcReO7, were identified. RP GIBSON, JK (reprint author), OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831, USA. NR 27 TC 4 Z9 4 U1 1 U2 2 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 62 IS 3 BP 127 EP 132 PG 6 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA MJ675 UT WOS:A1993MJ67500004 ER PT J AU FELMY, AR RAI, D MASON, MJ AF FELMY, AR RAI, D MASON, MJ TI SOLID-PHASE PRECIPITATES AND ANIONIC AQUEOUS THORIUM FLUORIDE COMPLEXES IN THE NA-NH4-TH-F-H2O SYSTEM TO HIGH-CONCENTRATION SO RADIOCHIMICA ACTA LA English DT Article DE SOLUBILITY; COMPLEXATION; THORIUM; FLUORIDE; ION-INTERACTION; AQUEOUS; THERMODYNAMIC ID NATURAL-WATERS; MINERAL SOLUBILITIES; HYDROUS OXIDE; THERMODYNAMICS; PREDICTION; ELECTROLYTES; 25-DEGREES-C; CONSTANTS; HYDROXIDE AB The solubility of thorium(IV) fluoride compounds in aqueous solutions of NaF and NH4F was studied over a wide range of aqueous fluoride concentrations, from 0.001 M to 1.0 M, and over equilibration periods extending to almost three months. These solubility data show that at aqueous fluoride concentrations of less-than-or-equal-to 0.01 M the equilibrium solid phase is a hydrated ThF4 . nH2O(c) Compound. At higher dissolved fluoride concentrations a series of ThF4 salts form, including NaF . ThF4 . H2O(c) and possibly 3NaF . ThF4(S) in NaF solutions, and NH4F . ThF4(s) in aqueous NH4F. The solubility data indicate that, as expected from previous studies, ThF3+ and ThF4(aq) are the dominant aqueous Th(IV) species, at least from 0.0001 M to 0.003 M dissolved fluoride concentration. However, at higher dissolved fluoride concentrations the solubility data support the existence of anionic Th - F complex species including ThF5- and ThF62-, for which there are no available thermodynamic data. Values are proposed for the standard chemical potentials of these anionic Th - F complexes and the equilibrium solid phases. The Pitzer ion-interaction parameters necessary to accurately describe these solubility data are also included. RP FELMY, AR (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 26 TC 4 Z9 4 U1 0 U2 1 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 62 IS 3 BP 133 EP 139 PG 7 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA MJ675 UT WOS:A1993MJ67500005 ER PT J AU MEYER, RJ ROMAN, F SHARMA, RB FERRIERI, RA RACK, EP AF MEYER, RJ ROMAN, F SHARMA, RB FERRIERI, RA RACK, EP TI STEREOCHEMICAL CONSEQUENCES OF RECOIL HALOGEN ATOM SUBSTITUTION .6. CL-38 FOR-X (X = CL,F) REACTIONS IN GASEOUS, LIQUID AND SOLID DIASTEREOMERIC DIHALOALKANES SO RADIOCHIMICA ACTA LA English DT Article DE HOT ATOM CHEMISTRY; HALOGEN ATOM SUBSTITUTION; STEREOCHEMISTRY ID HIGH-ENERGY CHLORINE; MOLECULAR MECHANICS CALCULATIONS; WALDEN INVERSION; GAS-PHASE; 2,3-DIHALOBUTANES; ENANTIOMERS AB The substitution reactions of hot Cl-38-for-X (X = F,Cl) produced by radiative neutron capture were studied in (2S,3R)-dl-and (2S,3S)-dl-chlorofluorobutane (CFB's), (2S,3R)-meso- and (2S,3S)-dl-dichlorobutane (DCB's), (2S,3S)-dl-2-chlorofluoropentane and (2S,3S)-dl-3-chlorofluoropentane (CFP's) and in (3S,4R)-dl- and (3S,4S)-dl-chlorofluorohexane (CFH's). Experiments were carried out in the gas, neat liquid, in solutions of n-hexane and acetonitrile, and in the solid phases. Both Cl-38-for-Cl and Cl-38-for-F substitutions at the chiral carbons occur mainly by substitutions with retention of configuration but with significant yields for the inversion of configuration products for gas, liquid and solid phase systems. A test for conformational effects by comparing free space or accessibility of each chiral center for substitution by attack of a hot atom with retention and inversion to experimentally determined values showed no significant correlation. While steric hindrance is an important factor for these substitution reactions, other parameters such as mass, size, polarizability and electronegativity, etc. must be considered. C1 UNIV NEBRASKA,DEPT CHEM,LINCOLN,NE 68588. DEPT VET AFFAIRS MED CTR,OMAHA,NE 68105. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. CREIGHTON UNIV,DEPT CHEM,OMAHA,NE 68178. WILLIAM BEAUMONT HOSP,DEPT NUCL MED,ROYAL OAK,MI 48073. NR 18 TC 1 Z9 1 U1 0 U2 0 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 62 IS 4 BP 181 EP 187 PG 7 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA MR745 UT WOS:A1993MR74500004 ER PT J AU SEABORG, GT AF SEABORG, GT TI OVERVIEW OF THE ACTINIDE AND LANTHANIDE (THE F) ELEMENTS SO RADIOCHIMICA ACTA LA English DT Article DE ACTINIDES; LANTHANIDES; OXIDATION STATES; ION-EXCHANGE SPECTRA; PRACTICAL APPLICATIONS AB The chemical properties, ion exchange behavior, oxidation states, ion types and stability, ionic radii, electronic structure, and crystal structure of the 14 actinides (plus actinium) and 14 lanthanides (plus lanthanum) are discussed on comparative basis. The analogous positions of these two groups of elements in the periodic table are discussed. Also included are tables identifying the discoverers of these 30 elements and a discussion of the practical application of many of them. RP SEABORG, GT (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 7 TC 85 Z9 89 U1 4 U2 25 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 61 IS 3-4 BP 115 EP 122 PG 8 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA MD507 UT WOS:A1993MD50700001 ER PT J AU HOFFMAN, DC AF HOFFMAN, DC TI ATOM-AT-A-TIME CHEMISTRY SO RADIOCHIMICA ACTA LA English DT Article DE ATOM-AT-A-TIME CHEMISTRY; ACTINIDES; TRANSACTINIDES; LAWRENCIUM; RUTHERFORDIUM; HAHNIUM; POSITIVE IDENTIFICATION ID GAS-PHASE CHROMATOGRAPHY; AQUEOUS-SOLUTION; CHEMICAL-PROPERTIES; P-ELEMENT; SEPARATIONS; LAWRENCIUM; DISCOVERY; APPARATUS AB The use of atom-at-a-time chemistry to investigate the chemical properties of the heaviest elements is discussed. Examples are given of historical and recent applications to studies of the chemical properties of elements 103, 104 and 105. C1 LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. RP HOFFMAN, DC (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. NR 37 TC 21 Z9 21 U1 0 U2 2 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 61 IS 3-4 BP 123 EP 128 PG 6 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA MD507 UT WOS:A1993MD50700002 ER PT J AU STUMP, NA MURRAY, GM DELCUL, GD HAIRE, RG PETERSON, JR AF STUMP, NA MURRAY, GM DELCUL, GD HAIRE, RG PETERSON, JR TI STOKES AND ANTI-STOKES LUMINESCENCE FROM THE TRIHALIDES OF CM-248 SO RADIOCHIMICA ACTA LA English DT Article DE CURIUM(III) SPECTROSCOPY; CURIUM TRIHALIDES; RESONANT 2-PHOTON SPECTROSCOPY ID PRESSURE AB The Stokes and anti-Stokes luminescence spectra characteristic of the trihalides of Cm3+ exhibit narrow features arising from transitions between the 5f electronic levels of the Cm3+ ion. The low background associated with anti-Stokes luminescence has allowed our observation of emission features which are ordinarily obscured by matrix scatter and/or matrix luminescence. Comparisons of the emission spectra of the four curium trihalides and corresponding absorption spectra are presented and discussed. C1 UNIV TENNESSEE,KNOXVILLE,TN 37996. UNIV MARYLAND,DEPT CHEM,CATONSVILLE,MD 21228. OAK RIDGE K-25 SITE,DEPT CHEM,DIV TECH,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV CHEM,TRANSURANIUM RES LAB,OAK RIDGE,TN 37831. RI Murray, George/A-6625-2011 NR 18 TC 19 Z9 19 U1 0 U2 3 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 61 IS 3-4 BP 129 EP 136 PG 8 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA MD507 UT WOS:A1993MD50700003 ER PT J AU ANDERSON, CJ WOODS, M DEUTSCH, E DEUTSCH, K SULLIVAN, JC AF ANDERSON, CJ WOODS, M DEUTSCH, E DEUTSCH, K SULLIVAN, JC TI A KINETIC-STUDY OF THE REDUCTION OF NP(VI) AND PU(VI) IN CARBONATE MEDIA BY TRIS[1,2-BIS(DIMETHYLPHOSPHINO)ETHANE] COMPLEXES OF TC(I) AND RE(I) SO RADIOCHIMICA ACTA LA English DT Article DE ACTINIDES; KINETICS; TECHNETIUM; RHENIUM; TRIS[1,2-BIS(DIMETHYLPHOSPHINO)ETHANE] ID ION AB The rates for the reactions between the dioxoactinide(VI) ions, NpO22+ and PuO22+, and the pair of related, outer-sphere reductants, [Tc(DMPE)3]+ and [Re(DMPE)3]+, have been measured in basic carbonate media. From the previously determined self-exchange rates for [Tc(I/II)(DMPE)3]+/2+ and [Re(I)/(II)(DMPE)3]+/2+ and the equilibrium constants for the cross reactions with An(VI)/(V), the self-exchange rates for the An(VI)/(V) couple are calculated using the Marcus cross relations. The k11 values are 0.69 and 3.0 M-1 s-1 for Np(VI)/(V) and Pu(VI)/(V), respectively with Tc(DMPE)3+ as a reductant, and 0.64 and 8.9 M-1 s-1 with Re(DMPE)3+ as a reductant (25-degrees-C, mu = 0.30 M). These values are compared to the An(VI)/(V) self-exchange rates previously determined by electrochemical techniques. Activation parameters (DELTAH* and DELTAS*) for these reactions have also been calculated. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. ROSARY COLL,RIVER FOREST,IL 60305. UNIV CINCINNATI,DEPT CHEM,CINCINNATI,OH 45221. NR 10 TC 2 Z9 2 U1 1 U2 2 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 61 IS 3-4 BP 137 EP 139 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA MD507 UT WOS:A1993MD50700004 ER PT J AU NASH, KL AF NASH, KL TI STABILITY AND STOICHIOMETRY OF URANYL PHOSPHONATE COORDINATION-COMPOUNDS IN ACIDIC AQUEOUS-SOLUTIONS SO RADIOCHIMICA ACTA LA English DT Article DE URANYL; PHOSPHONIC ACID COMPLEXANTS; STABILITY CONSTANTS; PROTONATION CONSTANTS; COORDINATION CHEMISTRY ID METHANE DIPHOSPHONIC ACIDS; COMPLEXES; ACTINIDES AB Previous reports from this laboratory have presented thermodynamic data describing the unique properties of diphosphonate ligands as aqueous complexants for lanthanide and actinide cations. Various mononuclear protonated complexes having stoichiometries M(H)(h)L)n (where h = 2 - 4 and n = 1 - 3) have been indicated as dominant species in acidic, aqueous media. The complexes are markedly stronger than isostructural carboxylate complexants. To further develop the systematics of the interactions of these ligands with polyvalent metal ions, the complex stability and stoichiometries for uranium(VI) complexes with methanediphosphonic acid (MDPA), vinylidene-1,1-diphosphonic acid (VDPA), 1-hydroxyethane-1,1-diphosphonic acid (HEDPA), ethane-1,2-diphosphonic acid (E12DPA), and carboxymethanephosphonic acid (CMPA) have been determined (I = 0.1 M, T = 25.0-degrees-C) in an extensive series or solvent extraction distribution experiments. The complexes of UO22+ with the 1,1-diphosphonates (MDPA, VDPA, HEDPA) are intermediate in stability between europium(III) and thorium(IV), though more similar to Th(IV) than Eu(III). Expansion of the chelate ring size (UO22+-E12DPA system) and substitution of carboxylate for phosphonate (UO22+-CMPA system both result in decreased complex stability, but the complexes are still more stable than isostructural carboxylate ligands. Electrostatic models are applied to explain metal-ligand interactions, and to derive specific comparisons with carboxylate ligands. RP NASH, KL (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 31 TC 26 Z9 26 U1 0 U2 6 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 61 IS 3-4 BP 147 EP 154 PG 8 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA MD507 UT WOS:A1993MD50700006 ER PT J AU ZIMMERMANN, HP GOBER, MK KRATZ, JV SCHADEL, M BRUCHLE, W SCHIMPF, E GREGORICH, KE TURLER, A CZERWINSKI, KR HANNINK, NJ KADKHODAYAN, B LEE, DM NURMIA, MJ HOFFMAN, DC GAGGELER, H JOST, D KOVACS, J SCHERER, UW WEBER, A AF ZIMMERMANN, HP GOBER, MK KRATZ, JV SCHADEL, M BRUCHLE, W SCHIMPF, E GREGORICH, KE TURLER, A CZERWINSKI, KR HANNINK, NJ KADKHODAYAN, B LEE, DM NURMIA, MJ HOFFMAN, DC GAGGELER, H JOST, D KOVACS, J SCHERER, UW WEBER, A TI CHEMICAL-PROPERTIES OF ELEMENT-105 IN AQUEOUS-SOLUTION - BACK EXTRACTION FROM TRIISOOCTYL AMINE INTO 0.5 M HCL SO RADIOCHIMICA ACTA LA English DT Article DE ELEMENT-105; CHEMICAL PROPERTIES; ANION EXCHANGE CHROMATOGRAPHY AB Previous studies of the halide complex formation of element 105 and its anion exchange with triisooctyl amine (TIOA) were continued. The experiments were performed on a one-minute time scale with the computer-controlled liquid chromatography system ARCA II on a mixture of 34-s Ha-262 and 27-s Ha-263 produced in the Bk-249(O-18,5n) and Bk-249(O-18,4n) reactions at a beam energy of 99 MeV. The Ha isotopes were detected by measuring the spontaneous fission and alpha-activities associated with their decay, and the alpha-decays of their daughters, 4-s Lr-258, and 6-s Lr-259. Time-correlated pairs of parent and daughter alpha-particles were also registered. Ha-262, Ha-263 was absorbed on the TIOA columns from either 12 M HCl/0.01 M HF or 10 M HCl, and was subsequently eluted in 0.5 M HCl/0.01 M HF like its homolog niobium, and the pseudohomolog protactinium, and unlike the closest homolog, tantalum, which remains in the amine phase under these conditions. The effluent was divided into an early Pa fraction and a subsequent Nb fraction. By varying the cut between the Pa fraction and the Nb fraction in rough steps, it was shown that the elution of element 105 occurs closer to the Pa elution position, i.e., earlier than the elution of Nb. These results confirm the non-tantalum like behavior of element 105 in 0.5 M HCl/0.01 M HF, and corroborate previously suggested structural differences between the halide complexes of element 105, niobium, and protactinium, on the one hand, and those of tantalum on the other hand. C1 GESELL SCHWERIONENFORSCH GMBH,W-6100 DARMSTADT,GERMANY. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. PAUL SCHERRER INST,CH-5232 VILLIGEN,SWITZERLAND. RP ZIMMERMANN, HP (reprint author), UNIV MAINZ,INST KERNCHEM,W-6500 MAINZ,GERMANY. RI Turler, Andreas/D-3913-2014 OI Turler, Andreas/0000-0002-4274-1056 NR 10 TC 44 Z9 45 U1 0 U2 4 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 60 IS 1 BP 11 EP 16 PG 6 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA KJ309 UT WOS:A1993KJ30900002 ER PT J AU HUNT, RD ANDREWS, L TOTH, LM AF HUNT, RD ANDREWS, L TOTH, LM TI MATRIX INFRARED STUDY ON THE FLUORINATION AND CHLORINATION OF UCL4 SO RADIOCHIMICA ACTA LA English DT Article DE UCL4; FLUORINATION; CHLORINATION; MATRIX INFRARED SPECTROSCOPY ID SOLID ARGON; CHLORIDE FLUORIDES; SPECTRA; COMPLEXES AB Uranium tetrachloride was condensed with fluorine in excess argon at 12 +/- 1 K, and an absorption due to UCl4F was observed at 588.3 cm-1. Photolysis produced primarily trans-UCl4F2 which has infrared bands at 621.4 and 350.8 cm-1. Sample annealing, which facilitated F atom addition to UCl4 and UCl4F, dramatically increased the 613.6, 579.2, and 359.3 cm-1 absorptions due to cis-UCl4F2. In contrast, no reaction was detected when UCl4 and chlorine were codeposited; however, photolysis produced a 358.2 cm-1 band which is assigned to UCl6. UCl5 was generated by reacting UCl4 with Cl atoms during deposition and identified by an absorption at 351.9 cm-1. C1 UNIV VIRGINIA,DEPT CHEM,CHARLOTTESVILLE,VA 22901. RP HUNT, RD (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831, USA. NR 12 TC 7 Z9 8 U1 0 U2 0 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 60 IS 1 BP 17 EP 20 PG 4 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA KJ309 UT WOS:A1993KJ30900003 ER PT J AU GUPTA, AK HANRAHAN, RJ WALKER, DD AF GUPTA, AK HANRAHAN, RJ WALKER, DD TI USE OF CO-60 GAMMA-IRRADIATION TO SIMULATE DECOMPOSITION OF TETRAPHENYLBORATE PRECIPITATES FROM HIGH-LEVEL RADIOACTIVE-WASTE SO RADIOCHIMICA ACTA LA English DT Article DE RADIOACTIVE WASTE; GAMMA RADIOLYSIS; POTASSIUM TETRAPHENYLBORATE ID PULSE-RADIOLYSIS; SODIUM AB The Co-60 gamma radiolysis of potassium tetraphenylborate (KTPB) precipitate was studied at 25-degrees-C in the presence of added Na+, NO3-, NO2-, and OH- ions, and after washing to remove the added ions. Analyses were done on the aqueous layer and after dissolving the solid in acetonitrile to release trapped products into solution. In the case of unwashed 8 wt% KTPB slurries, the products and their initial G-values are as follows: benzene, 6.7 (from dissolved solid); biphenyl, 1.6 (from solution) plus 0.44 (from dissolved solid); and nitrobenzene, 0.040 (from solution). Long term irradiation experiments (up to 60 days at a dose rate of ca. 0.32 Mrad/h) were carried out on unwashed and washed KTPB slurries; experiments were also done on washed precipitates at a threefold lower dose rate. Again, benzene, biphenyl, and nitrobenzene were found along with trace amounts of o-, m- and p-terphenyl. Individual product yields were higher at the lower dose rate, but the measured yield for destruction of KTPB was nearly dose-rate independent. Average yields over 10-40 days were ca. 0.2 to 1.0 for benzene (from the crystals), 0.04 to 0.4 for biphenyl (significant yields found from both solid and solution), and 0.001 to 0.03 for nitrobenzene (entirely from solution). However, under certain conditions, several of the individual yields approached plateau values or even peaked and decreased as irradiation continued. C1 WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER LAB,AIKEN,SC 29802. RP GUPTA, AK (reprint author), UNIV FLORIDA,DEPT CHEM,GAINESVILLE,FL 32611, USA. NR 14 TC 1 Z9 1 U1 0 U2 0 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 60 IS 1 BP 43 EP 51 PG 9 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA KJ309 UT WOS:A1993KJ30900008 ER PT J AU GIBSON, JK AF GIBSON, JK TI HIGH-TEMPERATURE OXIDE AND HYDROXIDE VAPOR SPECIES OF TECHNETIUM SO RADIOCHIMICA ACTA LA English DT Article DE TECHNETIUM OXIDE; TECHNETIUM HYDROXIDE; HIGH-TEMPERATURE VAPORS; MASS SPECTROMETRY; KNUDSEN EFFUSION; VOLATILITY AB In order to better characterize the high-temperature chemistry of technetium, its oxide was exposed to low pressures (approximately 10 Pa) of oxygen and/or water vapor up to 1100-degrees-C in a platinum Knudsen cell reactor. The resulting volatile products were identified mass spectrometrically. The significant technetium vapor species identified from the mass spectra were the following: TcO3(g), Tc2O7(g), TcO3(OH)(g), Tc2O5(g) and TcO2(OH)3(g); the last two of these were previously unreported. The identification of these species and their relative concentrations are discussed, and comparison is made with the corresponding high-temperature chemistry of homologous rhenium. RP GIBSON, JK (reprint author), OAK RIDGE NATL LAB,DIV CHEM,POB 2008,OAK RIDGE,TN 37831, USA. NR 17 TC 18 Z9 18 U1 0 U2 5 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 60 IS 2-3 BP 121 EP 126 PG 6 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA KX162 UT WOS:A1993KX16200011 ER PT J AU OKAJIMA, S REED, DT AF OKAJIMA, S REED, DT TI INITIAL HYDROLYSIS OF PLUTONIUM(VI) SO RADIOCHIMICA ACTA LA English DT Article DE PLUTONIUM(VI); HYDROLYSIS; SPECTROSCOPY ID SPECTROSCOPY AB The initial hydrolysis of Pu(VI) was investigated as a function of pH, total plutonium concentration, and temperature using a combination of absorption spectrometry and laser photo-acoustic spectroscopy. The initial product observed at total plutonium concentrations greater than 6 x 10(-5) M in sodium perchlorate was identified as a polynuclear species and proposed to be the (PuO2OH)22+ complex. The formation constant determined for the hydrolytic reaction is 5.0 +/- 1.5 x 10(-8) M, corresponding to a -logbeta22 value of 7.3 +/- 0.2. Varying the temperature between 10-degrees and 45-degrees-C had essentially no effect on this hydrolytic reaction. RP OKAJIMA, S (reprint author), ARGONNE NATL LAB,DIV CHEM TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 23 TC 12 Z9 12 U1 3 U2 5 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 60 IS 4 BP 173 EP 184 PG 12 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA LB348 UT WOS:A1993LB34800002 ER PT J AU SCHROEDER, NC MORGAN, D ROKOP, DJ FABRYKAMARTIN, J AF SCHROEDER, NC MORGAN, D ROKOP, DJ FABRYKAMARTIN, J TI MIGRATION OF TC-99 IN THE ALLUVIAL AQUIFER AT THE NEVADA TEST SITE, NEVADA SO RADIOCHIMICA ACTA LA English DT Article DE RADIONUCLIDE MIGRATION; TC-99; RELATIVE MIGRATION RATES ID LIGANDS AB The Cambric Experiment, under the auspices of the Hydrology/Radionuclide Migration Project, is measuring the migration of radionuclides from the site of an old underground nuclear test. Ten years after the 1965 test, a re-entry well (RNM-1) was drilled into the remnant of the explosion cavity to obtain core and water samples. Pumping water from a satellite well (RNM-2S) 91 m from the cavity subsequently induced an artificial gradient that has allowed soluble radionuclides to migrate from the cavity. Tritium (HTO) has been observed in the RNM-2S water; its elution has been well characterized. Other radionuclides have also been monitored in water from RNM-2S:Cl-36, Kr-85, I-129, and Ru-106. We have recently measured Tc-99 at the 10-20 fg/l level in RNM-2S water. In contrast to the H-3 source term, which is essentially entirely available to transport, these results indicate that only approximately 0.01% of the Tc-99 has escaped from the vitrified rock matrix into the water. The technetium in solution appears to be migrating more slowly than the Cl-36 is. Although Tc-99's initial breakthrough is similar to that for H-3, the migration rate of the Tc-99 center of mass appears to slightly exceed that of H-3, perhaps as a result of anion exclusion effects. All measured Tc-99 concentrations are considerably below limits established for public drinking water. C1 TRANSYLVANIA UNIV,LEXINGTON,KY 40508. RP SCHROEDER, NC (reprint author), LOS ALAMOS NATL LAB,DIV ISOTOPE & NUCL CHEM,LOS ALAMOS,NM 87545, USA. NR 24 TC 29 Z9 29 U1 0 U2 4 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 1993 VL 60 IS 4 BP 203 EP 209 PG 7 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA LB348 UT WOS:A1993LB34800007 ER PT J AU VALK, PE LAXER, KD BARBARO, NM KNEZEVIC, S DILLON, WP BUDINGER, TF AF VALK, PE LAXER, KD BARBARO, NM KNEZEVIC, S DILLON, WP BUDINGER, TF TI HIGH-RESOLUTION (2.6-MM) PET IN PARTIAL COMPLEX EPILEPSY ASSOCIATED WITH MESIAL TEMPORAL SCLEROSIS SO RADIOLOGY LA English DT Article DE BRAIN, DISEASES; BRAIN, RADIONUCLIDE STUDIES; EMISSION CT; EPILEPSY; TOMOGRAPHY, RADIONUCLIDE ID CEREBRAL GLUCOSE-METABOLISM; PARTIAL SEIZURES; TOMOGRAPHY AB Eleven patients with medically refractory partial seizures underwent positron emission tomography (PET) with a 600-crystal tomograph and fluorine-18 fluorodeoxyglucose. All patients had been selected for temporal lobe resection, and the side of the epileptogenic focus had been demonstrated with electroencephalography (EEG). Only patients in whom structural lesions had been excluded with magnetic resonance (MR) imaging were studied. Ten of 11 patients were found to have temporal cortical hypometabolism on the same side as the focal abnormality that was demonstrated with EEG. In two patients, PET showed hypometabolism in the mesial temporal cortex only. There were no incorrectly lateralizing PET results. MR imaging showed an abnormality in the corresponding temporal lobe in seven patients. In one patient, both PET and MR images were normal. All patients underwent anterior temporal resection, and histologic examination of resected tissue showed mesial temporal sclerosis in all cases. C1 UNIV CALIF SAN FRANCISCO,DEPT RADIOL,SAN FRANCISCO,CA 94143. UNIV CALIF SAN FRANCISCO,DEPT NEUROL,SAN FRANCISCO,CA 94143. UNIV CALIF SAN FRANCISCO,DEPT NEUROL SURG,SAN FRANCISCO,CA 94143. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 15 TC 31 Z9 31 U1 0 U2 0 PU RADIOLOGICAL SOC NORTH AMER PI EASTON PA 20TH AND NORTHAMPTON STS, EASTON, PA 18042 SN 0033-8419 J9 RADIOLOGY JI Radiology PD JAN PY 1993 VL 186 IS 1 BP 55 EP 58 PG 4 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA KD153 UT WOS:A1993KD15300014 PM 8416586 ER PT J AU WANG, GJ VOLKOW, ND ROQUE, CT CESTARO, VL HITZEMANN, RJ CANTOS, EL LEVY, AV DHAWAN, AP AF WANG, GJ VOLKOW, ND ROQUE, CT CESTARO, VL HITZEMANN, RJ CANTOS, EL LEVY, AV DHAWAN, AP TI FUNCTIONAL IMPORTANCE OF VENTRICULAR ENLARGEMENT AND CORTICAL ATROPHY IN HEALTHY-SUBJECTS AND ALCOHOLICS AS ASSESSED WITH PET, MR IMAGING, AND NEUROPSYCHOLOGICAL TESTING SO RADIOLOGY LA English DT Article DE ALCOHOLISM; BRAIN, ATROPHY; BRAIN, MR; BRAIN, RADIONUCLIDE STUDIES; EMISSION CT ID GLUCOSE-METABOLISM; BRAIN VOLUME; CONSUMPTION; AGE AB The authors assessed the relationship between ventricular enlargement, cortical atrophy, regional brain glucose metabolism, and neuropsychologic performance in 10 alcoholics and 10 control subjects. Regional brain glucose metabolism was measured with fluorine-18 fluorodeoxy-glucose (FDG) and positron emission tomography (PET). Cortical atrophy and ventricular size were evaluated quantitatively with magnetic resonance (MR) imaging. Alcoholics had decreased brain glucose metabolism and more cortical atrophy but did not have significantly greater ventricular size than did control subjects. The degree of ventricular enlargement and of cortical atrophy was associated with decreased metabolism predominantly in the frontal cortices and subcortical structures in both alcoholics and control subjects. There were no significant correlations between neuropsychologic performance and MR imaging structural changes, whereas various subtest scores were significantly correlated with frontal lobe metabolism. These data show that F-18 FDG PET is a sensitive technique for detecting early functional changes in the brain due to alcohol and/or aging before structural changes can be detected with MR imaging. C1 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 PSYCHOL, STONY BROOK, NY 11794 USA. UNIV CINCINNATI, DEPT COMP & ELECT ENGN, CINCINNATI, OH 45221 USA. RP WANG, GJ (reprint author), BROOKHAVEN NATL LAB, DEPT MED, UPTON, NY 11973 USA. NR 47 TC 115 Z9 117 U1 2 U2 7 PU RADIOLOGICAL SOC NORTH AMER PI EASTON PA 20TH AND NORTHAMPTON STS, EASTON, PA 18042 SN 0033-8419 J9 RADIOLOGY JI Radiology PD JAN PY 1993 VL 186 IS 1 BP 59 EP 65 PG 7 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA KD153 UT WOS:A1993KD15300015 PM 8416587 ER PT J AU ATKINS, HL MAUSNER, LF SRIVASTAVA, SC MEINKEN, GE STRAUB, RF CABAHUG, CJ WEBER, DA WONG, CTC SACKER, DF MADAJEWICZ, S PARK, TL MEEK, AG AF ATKINS, HL MAUSNER, LF SRIVASTAVA, SC MEINKEN, GE STRAUB, RF CABAHUG, CJ WEBER, DA WONG, CTC SACKER, DF MADAJEWICZ, S PARK, TL MEEK, AG TI BIODISTRIBUTION OF SN-117M[4+]DTPA FOR PALLIATIVE THERAPY OF PAINFUL OSSEOUS METASTASES SO RADIOLOGY LA English DT Article DE BONE NEOPLASMS, METASTASES; BONE NEOPLASMS, RADIONUCLIDE STUDIES; DOSIMETRY; RADIONUCLIDES, THERAPEUTIC ID PROSTATE-CANCER; INVIVO BEHAVIOR; BONE; SR-89; RADIOPHARMACEUTICALS; ANIMALS; EDTMP; TIN AB Tin-117 as certain physical characteristics (half-life of 13.6 days, low-energy-conversion electrons, gamma photon of 158.6 keV) that suggest that it may be a favorable agent for radionuclide therapy. It has been shown in animal models that Sn-117m in the chemical form Sn(4+)diethylenetriaminepentaacetic acid localizes selectively in bone. The authors therefore studied its whole-body distribution in 10 patients to obtain absorbed dose estimates for therapy. The results showed that more than 50% of the administered activity was absorbed in the bones of patients with metastatic carcinoma. Retention was determined primarily by radioactive decay. For adult men, the radiation absorbed dose estimate averaged 54.8 mGy/MBq (203 rad/mCi) to bone surfaces and 6.1 mGy/MBq (22.6 rad/mCi) to the red marrow. All other tissues received less than 1/10 of the dose received by red marrow. These results suggest that a clinical therapeutic trial should be attempted. C1 SUNY HLTH SCI CTR,DEPT RADIOL,STONY BROOK,NY. SUNY HLTH SCI CTR,DEPT RADIOL ONCOL,STONY BROOK,NY. SUNY HLTH SCI CTR,DIV MED ONCOL,STONY BROOK,NY. RP ATKINS, HL (reprint author), BROOKHAVEN NATL LAB,DEPT MED,BLDG 490,BELL AVE,UPTON,NY 11973, USA. NR 16 TC 50 Z9 55 U1 0 U2 0 PU RADIOLOGICAL SOC NORTH AMER PI EASTON PA 20TH AND NORTHAMPTON STS, EASTON, PA 18042 SN 0033-8419 J9 RADIOLOGY JI Radiology PD JAN PY 1993 VL 186 IS 1 BP 279 EP 283 PG 5 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA KD153 UT WOS:A1993KD15300056 PM 7677974 ER PT J AU TANG, K ALLMAN, SL JONES, RB CHEN, CH ARAGHI, S AF TANG, K ALLMAN, SL JONES, RB CHEN, CH ARAGHI, S TI LASER MASS-SPECTROMETRY OF POLYDEOXYRIBOTHYMIDYLIC ACID MIXTURES SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY LA English DT Article ID MOLECULAR-WEIGHT; DESORPTION; MATRIX; IONIZATION; DNA AB Matrix-assisted laser desorption/ionization mass spectrometry has been used to mass analyze synthetic oligomers of poly-T ranging in size from 20 to 100 nucleotides. Both positively- and negatively-charged parent molecular ions were observed. C1 OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,POB 2008,OAK RIDGE,TN 37831. RI Allman, Steve/A-9121-2011; Tang, Kai/A-2194-2011 OI Allman, Steve/0000-0001-6538-7048; NR 22 TC 33 Z9 33 U1 0 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0951-4198 J9 RAPID COMMUN MASS SP JI Rapid Commun. Mass Spectrom. PD JAN PY 1993 VL 7 IS 1 BP 63 EP 66 DI 10.1002/rcm.1290070115 PG 4 WC Chemistry, Analytical; Spectroscopy SC Chemistry; Spectroscopy GA KJ908 UT WOS:A1993KJ90800014 ER PT B AU NORMAN, EB AF NORMAN, EB BE Greco, M TI NEUTRINO MASS SO RECONTRES DE PHYSIQUE DE LA VALLEE D AOSTE - RESULTS AND PERSPECTIVES IN PARTICLE PHYSICS, 1993 LA English DT Proceedings Paper CT Conference on Physics - Results and Perspectives in Particle Physics CY MAR 07-13, 1993 CL ALA THUILE, ITALY SP INFN, LAB NAZL FRASCATI, INFN, SEZ PISA C1 LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-139-0 PY 1993 BP 51 EP 60 PG 10 WC Physics, Particles & Fields SC Physics GA BC34M UT WOS:A1993BC34M00004 ER PT B AU WAINER, N AF WAINER, N BE Greco, M TI JET SHAPES IN HADRON AND ELECTRON COLLIDERS SO RECONTRES DE PHYSIQUE DE LA VALLEE D AOSTE - RESULTS AND PERSPECTIVES IN PARTICLE PHYSICS, 1993 LA English DT Proceedings Paper CT Conference on Physics - Results and Perspectives in Particle Physics CY MAR 07-13, 1993 CL ALA THUILE, ITALY SP INFN, LAB NAZL FRASCATI, INFN, SEZ PISA C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-139-0 PY 1993 BP 141 EP 151 PG 11 WC Physics, Particles & Fields SC Physics GA BC34M UT WOS:A1993BC34M00008 ER PT B AU RAJA, R AF RAJA, R BE Greco, M TI SEARCH FOR THE TOP QUARK FROM (E,epsilon) AND (E,E) EVENTS IN THE DO DETECTOR IN P(P)OVER-BAR COLLISIONS AT root S=1.8 TEV SO RECONTRES DE PHYSIQUE DE LA VALLEE D AOSTE - RESULTS AND PERSPECTIVES IN PARTICLE PHYSICS, 1993 LA English DT Proceedings Paper CT Conference on Physics - Results and Perspectives in Particle Physics CY MAR 07-13, 1993 CL ALA THUILE, ITALY SP INFN, LAB NAZL FRASCATI, INFN, SEZ PISA C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-139-0 PY 1993 BP 407 EP 424 PG 18 WC Physics, Particles & Fields SC Physics GA BC34M UT WOS:A1993BC34M00023 ER PT B AU CAMPAGNARI, C AF CAMPAGNARI, C BE Greco, M TI TOP SEARCH AT CDF SO RECONTRES DE PHYSIQUE DE LA VALLEE D AOSTE - RESULTS AND PERSPECTIVES IN PARTICLE PHYSICS, 1993 LA English DT Proceedings Paper CT Conference on Physics - Results and Perspectives in Particle Physics CY MAR 07-13, 1993 CL ALA THUILE, ITALY SP INFN, LAB NAZL FRASCATI, INFN, SEZ PISA C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-139-0 PY 1993 BP 425 EP 445 PG 21 WC Physics, Particles & Fields SC Physics GA BC34M UT WOS:A1993BC34M00024 ER PT B AU ROE, NA AF ROE, NA BE Greco, M TI ELECTROWEAK PHYSICS FROM DO SO RECONTRES DE PHYSIQUE DE LA VALLEE D AOSTE - RESULTS AND PERSPECTIVES IN PARTICLE PHYSICS, 1993 LA English DT Proceedings Paper CT Conference on Physics - Results and Perspectives in Particle Physics CY MAR 07-13, 1993 CL ALA THUILE, ITALY SP INFN, LAB NAZL FRASCATI, INFN, SEZ PISA C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-139-0 PY 1993 BP 447 EP 457 PG 11 WC Physics, Particles & Fields SC Physics GA BC34M UT WOS:A1993BC34M00025 ER PT B AU BJORKEN, JD KOWALSKI, KL TAYLOR, CC AF BJORKEN, JD KOWALSKI, KL TAYLOR, CC BE Greco, M TI BAKED ALASKA SO RECONTRES DE PHYSIQUE DE LA VALLEE D AOSTE - RESULTS AND PERSPECTIVES IN PARTICLE PHYSICS, 1993 LA English DT Proceedings Paper CT Conference on Physics - Results and Perspectives in Particle Physics CY MAR 07-13, 1993 CL ALA THUILE, ITALY SP INFN, LAB NAZL FRASCATI, INFN, SEZ PISA C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. NR 0 TC 0 Z9 0 U1 0 U2 0 PU EDITIONS FRONTIERES PI DREUX PA 7 AVENUE KENNEDY, 28100 DREUX, FRANCE BN 2-86332-139-0 PY 1993 BP 507 EP 525 PG 19 WC Physics, Particles & Fields SC Physics GA BC34M UT WOS:A1993BC34M00029 ER PT J AU GALLEGOS, DP BONANO, EJ AF GALLEGOS, DP BONANO, EJ TI CONSIDERATION OF UNCERTAINTY IN THE PERFORMANCE ASSESSMENT OF RADIOACTIVE-WASTE DISPOSAL FROM AN INTERNATIONAL REGULATORY PERSPECTIVE SO RELIABILITY ENGINEERING & SYSTEM SAFETY LA English DT Article ID RISK ANALYSIS; JUDGMENT AB Regulations governing the disposal of radioactive wastes require that the performance of disposal facilities be assessed quantitatively. Such assessments, commonly called either 'performance assessments' or 'probabilistic risk assessments', rely on the use of predictive models to arrive at a quantitative estimate of the potential impact of disposal on the environment and on the safety and health of the public. It has been recognized that a suite of uncertainties affect the results of a performance assessment (herein we use 'performance assessment' to be synonymous to probabilistic risk assessment). These uncertainties are conventionally categorized as (1) uncertainty in the future state of the disposal system (facility and surrounding medium), (2) uncertainty in models (including conceptual models, mathematical models, and computer codes), and (3) uncertainty in data and parameters. Decisions regarding the safety of a radioactive waste disposal facility must be made in the light of these uncertainties. Neglecting the uncertainties, in either the analysis or the presentation of results, would be a misrepresentation of one's knowledge (e.g. overconfidence) about the performance of the disposal facility. Hence, an approach is needed that would allow the explicit consideration of these uncertainties so that their impact on the estimated consequences of disposal can be evaluated. Regulations for radioactive waste disposal in many countries, explicitly or implicitly, require the consideration of uncertainties in order to arrive at a meaningful decision regarding the safety of a disposal facility. A probabilistic risk assessment approach provides the formalism for treating the uncertainties and the technical basis that the decision makers can use in discharging their duties. RP GALLEGOS, DP (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 41 TC 20 Z9 20 U1 0 U2 1 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0951-8320 J9 RELIAB ENG SYST SAFE JI Reliab. Eng. Syst. Saf. PY 1993 VL 42 IS 2-3 BP 111 EP 123 DI 10.1016/0951-8320(93)90085-D PG 13 WC Engineering, Industrial; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA MV160 UT WOS:A1993MV16000002 ER PT J AU KELLY, DL AF KELLY, DL TI USE OF CONSTRAINED LOGNORMAL-DISTRIBUTION IN RELIABILITY-ANALYSIS SO RELIABILITY ENGINEERING & SYSTEM SAFETY LA English DT Article AB This paper presents a method for adjusting the distribution of error probabilities in cases where one is faced with error bounds that are not mathematically meaningful. This approach is also amenable for fitting a distribution to positively skewed observational data, where the data represent probabilities of error. The technique is mathematically rigorous and is relatively straightforward to apply and can be automated easily. The technique was developed during a ground-up human reliability analysis in which uncertainties in basic human errors were propagated through the full human reliability event trees used to model operator errors. RP KELLY, DL (reprint author), IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0951-8320 J9 RELIAB ENG SYST SAFE JI Reliab. Eng. Syst. Saf. PY 1993 VL 40 IS 1 BP 43 EP 47 DI 10.1016/0951-8320(93)90117-H PG 5 WC Engineering, Industrial; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA KL274 UT WOS:A1993KL27400005 ER PT J AU RUSSELL, KD RASMUSON, DM AF RUSSELL, KD RASMUSON, DM TI FAULT TREE REDUCTION AND QUANTIFICATION - AN OVERVIEW OF IRRAS ALGORITHMS SO RELIABILITY ENGINEERING & SYSTEM SAFETY LA English DT Article AB This paper provides a comprehensive overview of the fault tree and accident sequence cut set reduction and quantification algorithms used in the Integrated Reliability and Risk Analysis System (IRRAS). The basic fault tree reduction algorithm is a top-down approach that uses some bottom-up techniques and takes advantage of several optimization methods to restructure and prune the fault tree. These methods include independent sub-trees, probability pruning, and coalescing of gates. The accident sequence algorithm builds a fault tree containing the failed and successful or working systems, and then uses the fault tree cut set algorithm to solve the tree. C1 US NUCL REGULATORY COMMISS,WASHINGTON,DC 20555. RP RUSSELL, KD (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 20 TC 14 Z9 14 U1 0 U2 1 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0951-8320 J9 RELIAB ENG SYST SAFE JI Reliab. Eng. Syst. Saf. PY 1993 VL 40 IS 2 BP 149 EP 164 DI 10.1016/0951-8320(93)90105-8 PG 16 WC Engineering, Industrial; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA KR197 UT WOS:A1993KR19700006 ER PT J AU GERTMAN, DI AF GERTMAN, DI TI REPRESENTING COGNITIVE ACTIVITIES AND ERRORS IN HRA TREES SO RELIABILITY ENGINEERING & SYSTEM SAFETY LA English DT Article AB A graphic representation method is presented herein for adapting an existing technology-human reliability analysis (HRA) event trees, used to support event seqence logic structures and calculations-to include a representation of the underlying cognitive activity and corresponding errors associated with human performance. The analyst is presented with three potential means of representing human activity: the NUREG/CR-1278 HRA event-tree approach;1 the skill-, rule- and knowledge-based paradigm;9 and the slips, lapses, and mistakes paradigm.3 The above approaches for representing human activity are integrated in order to produce an enriched HRA event tree-the cognitive event tree system (COGENT)-which, in turn , can be used to increase the analyst's understanding of the basic behavioral mechanisms underlying human error and the representation of that error in probabilistic risk assessment. Issues pertaining to the implementation of COGENT are also discussed. RP GERTMAN, DI (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 21 TC 5 Z9 7 U1 0 U2 1 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0951-8320 J9 RELIAB ENG SYST SAFE JI Reliab. Eng. Syst. Saf. PY 1993 VL 39 IS 1 BP 25 EP 34 DI 10.1016/0951-8320(93)90145-O PG 10 WC Engineering, Industrial; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA KJ204 UT WOS:A1993KJ20400003 ER PT J AU MARTZ, HF HAMM, LL REED, WH PAN, PY AF MARTZ, HF HAMM, LL REED, WH PAN, PY TI COMBINING MECHANISTIC BEST-ESTIMATE ANALYSIS AND LEVEL-1 PROBABILISTIC RISK ASSESSMENT SO RELIABILITY ENGINEERING & SYSTEM SAFETY LA English DT Article AB Traditionally, both deterministic and probabilistic methods have been used in the safety analysis of nuclear reactors. Both of these methods have evolved in recent years to a more sophisticated treatment of uncertainties in the analysis. In particular, deterministic analysts have moved away from the traditional conservative methods to best-estimate techniques that attempt to account for uncertainties in all phases of the calculations. Because of this, a tighter and more formal coupling between the deterministic and probabilistic methods has become possible. This paper introduces a formal methodology for such combination, presents an illustrative example, and discusses a new technique for deriving acceptance criteria for deterministic analyses based on probabilistic considerations. RP MARTZ, HF (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 18 TC 6 Z9 6 U1 1 U2 1 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0951-8320 J9 RELIAB ENG SYST SAFE JI Reliab. Eng. Syst. Saf. PY 1993 VL 39 IS 1 BP 89 EP 108 DI 10.1016/0951-8320(93)90151-N PG 20 WC Engineering, Industrial; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA KJ204 UT WOS:A1993KJ20400009 ER PT J AU HELTON, JC BREEDING, RJ AF HELTON, JC BREEDING, RJ TI CALCULATION OF REACTOR ACCIDENT SAFETY GOALS SO RELIABILITY ENGINEERING & SYSTEM SAFETY LA English DT Article ID NUCLEAR-REGULATORY-COMMISSION; SENSITIVITY ANALYSIS; UNCERTAINTY; ASSESSMENTS; PROBABILITY AB The US Nuclear Regulatory Commission is in the process of developing safety goals for the operation of nuclear power plants. At present, two safety goals (individual early fatality risk and individual latent cancer fatality risk) and three quantitative risk goals (severe accident frequency, conditional probability of containment failure, and large release frequency) are emerging from this development. Each of these goals requires that the expected value for a quantity be less than a specified value, where the expectation is calculated over imprecisely known parameters required in the analysis. This presentation provides a description of the calculations involved in the determination of these goals, including uncertainty analysis, sensitivity analysis and estimation of expected values. Results obtained in a probabilistic risk assessment performed for internally initiated accidents at the Surry Nuclear Power Station as part of the NUREG-1150 analyses are used for illustration. C1 SANDIA NATL LABS,DIV SPECIAL PROJECTS 6411,ALBUQUERQUE,NM 87185. RP HELTON, JC (reprint author), ARIZONA STATE UNIV,DEPT MATH,TEMPE,AZ 85287, USA. NR 75 TC 48 Z9 48 U1 2 U2 8 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0951-8320 J9 RELIAB ENG SYST SAFE JI Reliab. Eng. Syst. Saf. PY 1993 VL 39 IS 2 BP 129 EP 158 DI 10.1016/0951-8320(93)90038-Z PG 30 WC Engineering, Industrial; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA KK974 UT WOS:A1993KK97400002 ER PT J AU PAULA, HM ROBERTS, MW BATTLE, RE AF PAULA, HM ROBERTS, MW BATTLE, RE TI OPERATIONAL FAILURE EXPERIENCE OF FAULT-TOLERANT DIGITAL-CONTROL SYSTEMS SO RELIABILITY ENGINEERING & SYSTEM SAFETY LA English DT Article AB Fault-tolerant digital control systems (F-T DCSs) can theoretically achieve extremely high reliability, i.e. high mean time between failures (MTBFs). However, in actual applications theoretical MTBFs are idealized goals, and even the more modest goals can only be achieved with great effort at the design stage (particularly software design) and with excellence in operation/maintenance throughout the life of the system. This paper discusses the reliability performance of F-T DCSs, including a presentation of actual failure experience from 20 different computer system installations. Particular emphasis is given to identifying major contributors to system unreliability and comparing different types of F-T DCS architectures. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP PAULA, HM (reprint author), JBF ASSOCIATES INC,1000 TECHNOL PK CTR,KNOXVILLE,TN 37932, USA. NR 15 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0951-8320 J9 RELIAB ENG SYST SAFE JI Reliab. Eng. Syst. Saf. PY 1993 VL 39 IS 3 BP 273 EP 289 DI 10.1016/0951-8320(93)90004-I PG 17 WC Engineering, Industrial; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA KJ574 UT WOS:A1993KJ57400004 ER PT J AU WYROBEK, AJ AF WYROBEK, AJ TI METHODS AND CONCEPTS IN DETECTING ABNORMAL REPRODUCTIVE OUTCOMES OF PATERNAL ORIGIN SO REPRODUCTIVE TOXICOLOGY LA English DT Article; Proceedings Paper CT INTERNATIONAL WORKSHOP ON IN VITRO METHODS IN REPRODUCTIVE TOXICOLOGY CY MAY 19-20, 1992 CL NATL ARTS CTR, OTTAWA, CANADA SP ORG ECON COOPERAT & DEV, INT PROGRAMME CHEM SAFETY HO NATL ARTS CTR DE BIOMARKERS; EXPOSURE; SPERM; IN-VIVO; IN-VITRO; REPRODUCTION; GENETIC TOXICOLOGY; HERITABLE MUTATION; GERMINAL MUTATION; DEVELOPMENT; BIRTH DEFECTS; CHILDHOOD CANCERS ID HUMAN-SPERM; EXPOSURE; CANCER; RADIOTHERAPY; ABERRATIONS; CHROMOSOMES; FREQUENCY; REPAIR; DAMAGE AB There is conclusive evidence that exposures of human males to ionizing radiation or certain chemicals can diminish sperm production and reduce fertility. Of approximately 100 chemical agents and mixtures that have been evaluated in men by semen analysis, about half (mostly drugs and a few occupational exposures) reduced sperm quantity and quality; several of these agents also affected the fertility of exposed men. It is now well recognized that the importance of the father in reproduction goes beyond fertilization. Abnormalities in paternal chromosomes (structural and numeric) have been found in various abnormal reproductive outcomes, including chromosomal abnormality syndromes among newborns. In rodent systems, exposure of males to mutagens before mating induces transmissible cytogenetic and genetic abnormalities as well as morphologic defects and cancer among offspring. Consistent with animal findings, there is growing epidemiologic evidence of associations between male exposures to exogenous agents and abnormal reproductive outcomes (fetal loss, birth defects, childhood cancer, etc.). However, no clear links have been established between exposure, mechanism of transmission, and abnormal reproductive outcomes. It is not known to what extent male-mediated birth defects and childhood cancer are due to genetic, epigenetic, or nongenetic causes. Viewed in a multigenerational context, the role of the father in abnormal reproductive outcomes is dependent on his exposure history and susceptibilities as well as those of his mate. Relevant exposures may occur any time between conception of the parents and production of their fertilizing gametes, including their development in utero, childhood, and adolescence. Efficient measurements (including biomarkers) of relevant exposure, early biologic effects, and susceptibility in human males are under development. An integrated approach is recommended for assessing male reproductive and genetic toxicity that utilizes biomarkers in (a) epidemiologic studies of exposed human populations, (b) risk characterization in sensitive laboratory species, and (c) in vivo and in vitro studies of the molecular mechanisms of action of toxicants. A special category of ''bridging'' biomarkers is needed for evaluating animal data for risk assessment and for discriminating among genetic, epigenetic, and nongenetic mechanisms of abnormal reproductive outcomes of paternal origin. RP WYROBEK, AJ (reprint author), LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,BIODOSIMETRY GRP,L-452,7000 EAST AVE,LIVERMORE,CA 94550, USA. FU NIEHS NIH HHS [Y01-ES-10203-00] NR 42 TC 75 Z9 77 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0890-6238 J9 REPROD TOXICOL JI Reprod. Toxicol. PY 1993 VL 7 SU 1 BP 3 EP 16 DI 10.1016/0890-6238(93)90064-E PG 14 WC Reproductive Biology; Toxicology SC Reproductive Biology; Toxicology GA LU305 UT WOS:A1993LU30500002 PM 8400638 ER PT B AU DRAKE, JT WILLIAMSON, RL RABIN, BH AF DRAKE, JT WILLIAMSON, RL RABIN, BH BE Barrera, EV Dutta, I TI NUMERICAL MODELING APPROACH TO THE PREDICTION OF OPTIMUM GRADED CERAMIC-METAL MICROSTRUCTURES SO RESIDUAL STRESSES IN COMPOSITES: MEASUREMENT, MODELING & EFFECTS ON THERMO-MECHANICAL BEHAVIOR LA English DT Proceedings Paper CT Symposium on Residual Stresses in Composites CY FEB 21-25, 1993 CL DENVER, CO SP MINERALS MET & MAT SOC, STRUCT MAT DIV C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-216-7 PY 1993 BP 25 EP 35 PG 11 WC Materials Science, Multidisciplinary; Mechanics SC Materials Science; Mechanics GA BZ39Y UT WOS:A1993BZ39Y00002 ER PT B AU BOURKE, MAM GOLDSTONE, JA STOUT, MG LAWSON, AC ALLISON, JE AF BOURKE, MAM GOLDSTONE, JA STOUT, MG LAWSON, AC ALLISON, JE BE Barrera, EV Dutta, I TI STRAIN-MEASUREMENT IN INDIVIDUAL PHASES OF AN AL-TIC COMPOSITE DURING MECHANICAL LOADING SO RESIDUAL STRESSES IN COMPOSITES: MEASUREMENT, MODELING & EFFECTS ON THERMO-MECHANICAL BEHAVIOR LA English DT Proceedings Paper CT Symposium on Residual Stresses in Composites CY FEB 21-25, 1993 CL DENVER, CO SP MINERALS MET & MAT SOC, STRUCT MAT DIV C1 LOS ALAMOS NATL LAB,MANUEL LUJAN JR NEUTRON SCATTERING CTR,LOS ALAMOS,NM 87545. NR 0 TC 7 Z9 7 U1 1 U2 1 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-216-7 PY 1993 BP 67 EP 77 PG 11 WC Materials Science, Multidisciplinary; Mechanics SC Materials Science; Mechanics GA BZ39Y UT WOS:A1993BZ39Y00004 ER PT J AU SWANK, WD FINCKE, JR HAGGARD, DC AF SWANK, WD FINCKE, JR HAGGARD, DC TI MODULAR ENTHALPY PROBE AND GAS ANALYZER FOR THERMAL PLASMA MEASUREMENTS SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID JETS AB The enthalpy or calorimetric probe is a water-cooled stagnation/sampling probe for studying the temperature, velocity, and composition of hot-gas flow fields. In order to derive the thermodynamic properties of complex flow fields such as plasma arc jets or high-velocity oxygen fuel jets, the specie concentration must be known accurately. To this end a differentially pumped quadrapole mass spectrometer has been integrated with a fully automated enthalpy probe system. An inexpensive modular probe is described along with the system and its theory of operation. Calibration and error are also discussed. Typical results are presented for the system operating in an argon/helium plasma arc jet in atmospheric pressure air. The maximum temperature measured is 13434 K on the center line of the jet, 5 mm from the exit, with a corresponding velocity of 1295 m/s. The utility in integrating the mass spectrometer to the enthalpy probe system is not only an accurate measurement of the gas mixture components for obtaining the correct property information, but also valuable information can be obtained about demixing diffusion and chemical reaction taking place in the plasma plume. The relative amount of argon to helium is shown to deviate from the nominal mixture by as much as 40% at the center of the plume. RP SWANK, WD (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 16 TC 42 Z9 47 U1 1 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD JAN PY 1993 VL 64 IS 1 BP 56 EP 62 DI 10.1063/1.1144402 PG 7 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA KG744 UT WOS:A1993KG74400008 ER PT J AU PRESES, JM HALL, GE MUCKERMAN, JT SEARS, TJ WESTON, RE GUYOT, C HANSON, JC FLYNN, GW BERNSTEIN, HJ AF PRESES, JM HALL, GE MUCKERMAN, JT SEARS, TJ WESTON, RE GUYOT, C HANSON, JC FLYNN, GW BERNSTEIN, HJ TI FOURIER-TRANSFORM SPECTROPHOTOMETER FOR TIME-RESOLVED EMISSION MEASUREMENTS USING A 100-POINT TRANSIENT DIGITIZER SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID FTIR EMISSION; VIBRATIONAL DISTRIBUTIONS; SCAN INTERFEROMETER; STATE DISTRIBUTION; ROTATIONAL-STATE; O(1D2) REACTIONS; 193 NM; SPECTROSCOPY; PHOTOFRAGMENTATION; PHOTODISSOCIATION AB An infrared time-resolved Fourier-transform emission spectrophotometer has been constructed and its use has been demonstrated. The instrument is based on a commercial interferometer combined with a CAMAC-based data acquisition system. The use of a transient digitizer permits acquisition of a single interferogram point at 100 time intervals following a single photoexcitation. The instrument operates in the ''smooth scan'' mode. The combination of this mode of operation with the use of a transient digitizer provides great time efficiency for data acquisition because there is no mirror settling time at each optical retardation. Complete interferograms free from the artifacts associated with assembly of interferograms arising from multiple scans are available after each mirror scan. The maximum resolution of the present instrument is 0.1 cm-1, limited only by data storage considerations; the maximum resolution of the commercial interferometer is 0.02 cm-1 (with apodization) and could be utilized with long scans. The shortest time that can be resolved by the instrument, currently approximately 1-2 mus, is limited only by the infrared detector/preamplifier combination. The longest time interval which is permitted between successive photochemical or photophysical events (nominally 3.16 ms) is limited by the slowest scan velocity of the moving mirror, (0.01 cm/s). Usable data can be acquired from 10 to 50 mirror scans, where acquisition, storage, and coaddition of a single 1 cm-1 resolution scan takes approximately 5 min. C1 COLUMBIA UNIV,DEPT CHEM,NEW YORK,NY 10027. COLUMBIA UNIV,COLUMBIA RADIAT LAB,NEW YORK,NY 10027. BERNSTEIN & SONS,BELLPORT,NY 11713. RP PRESES, JM (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. RI Hanson, jonathan/E-3517-2010; Muckerman, James/D-8752-2013; Sears, Trevor/B-5990-2013; Hall, Gregory/D-4883-2013 OI Sears, Trevor/0000-0002-5559-0154; Hall, Gregory/0000-0002-8534-9783 NR 30 TC 7 Z9 7 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD JAN PY 1993 VL 64 IS 1 BP 95 EP 102 DI 10.1063/1.1144409 PG 8 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA KG744 UT WOS:A1993KG74400015 ER PT J AU BLAIS, NC FRY, HA GREINER, NR AF BLAIS, NC FRY, HA GREINER, NR TI APPARATUS FOR THE MASS-SPECTROMETRIC ANALYSIS OF DETONATION PRODUCTS QUENCHED BY ADIABATIC FREE EXPANSION SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article AB We describe an apparatus that enables mass spectral analysis of the reacting chemical mixtures that drive detonation. Laboratory-scale (approximately 0.1 g) explosive pellets are detonated in a high-vacuum chamber and rapid cooling by adiabatic free expansion quenches the chemical reactions. The instrument records a series of 95 mass spectra of the quenched reaction mixtures from one pellet. The spectra cover the mass range m = 1 to m = 300 and are recorded every 12 mus, which provides a mass analysis for every 20 mum of the detonation wave. This expansion of the time scale occurs because after expansion a 20-mum layer takes 12 mus to pass the mass spectrometer ionizer. The series of spectra give a molecular characterization of the chemical processes that drive detonation. RP BLAIS, NC (reprint author), LOS ALAMOS NATL LAB,DIV CHEM & LASER SCI,LOS ALAMOS,NM 87545, USA. NR 12 TC 16 Z9 16 U1 3 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD JAN PY 1993 VL 64 IS 1 BP 174 EP 183 DI 10.1063/1.1144421 PG 10 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA KG744 UT WOS:A1993KG74400026 ER PT J AU LONDONO, JD COCHRAN, HD BIENKOWSKI, PR SHAH, VM AF LONDONO, JD COCHRAN, HD BIENKOWSKI, PR SHAH, VM TI CRYOGENIC APPARATUS FOR SCATTERING AND PHASE-EQUILIBRIUM STUDIES SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article AB A cryogenic apparatus has been developed for neutron scattering and phase equilibrium studies on supercritical inert gas mixtures. Scattering and phase equilibrium studies can be performed in the same apparatus; the whole apparatus is transportable to any scattering facility. It centers on a stirred, batch, view cell of unique design. By changing only three parts of simple design (two windows, one sample cylinder) to an appropriate material, this apparatus can be used for studies involving wide or small angle scattering of neutrons or x rays. Its use can also be extended to pure fluids, liquids, and states away from the critical point. It operates within pressure and temperature ranges of 0-13.8 MPa and 20-300 K. To our knowledge this is the first neutron scattering cell with axial fluid mixing and with a temperature gradient of 10 mK or less over a large sample volume (1-cm diameter, 5-cm long). The accuracy and performance of the apparatus was tested on pure neon by reproducing its saturation curve and by performing small angle neutron scattering on some supercritical states. C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. RP LONDONO, JD (reprint author), UNIV TENNESSEE,DEPT CHEM ENGN,KNOXVILLE,TN 37996, USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD JAN PY 1993 VL 64 IS 1 BP 200 EP 202 DI 10.1063/1.1144434 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA KG744 UT WOS:A1993KG74400030 ER PT J AU HYDE, TA SELLERS, CH AF HYDE, TA SELLERS, CH TI A SIMPLE, RAPID RESPONSE VACUUM FURNACE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article AB This article presents a simple, lab scale, vacuum furnace design that features good temperature stability, rapid temperature response, and high-vacuum and high-temperature capabilities. The furnace was developed for applications such as in situ electrical resistivity measurements, precise heat treatment of small samples, and complex heat treatments. RP HYDE, TA (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 2 TC 2 Z9 2 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD JAN PY 1993 VL 64 IS 1 BP 228 EP 230 DI 10.1063/1.1144441 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA KG744 UT WOS:A1993KG74400037 ER PT J AU GUTHRIE, GD MOSSMAN, BT AF GUTHRIE, GD MOSSMAN, BT TI MERGING THE GEOLOGICAL AND BIOLOGICAL SCIENCES - AN INTEGRATED APPROACH TO THE STUDY OF MINERAL-INDUCED PULMONARY-DISEASES SO REVIEWS IN MINERALOGY LA English DT Review C1 UNIV VERMONT, COLL MED, DEPT PATHOL, BURLINGTON, VT 05405 USA. RP GUTHRIE, GD (reprint author), LOS ALAMOS NATL LAB, GEOL & GEOCHEM GRP, EES-1, LOS ALAMOS, NM 87545 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU MINERALOGICAL SOC AMER PI CHANTILLY PA 3635 CONCORDE PKWY STE 500, CHANTILLY, VA 20151-1125 USA SN 0275-0279 J9 REV MINERAL JI Rev. Mineral. PY 1993 VL 28 BP 1 EP 5 PG 5 WC Mineralogy SC Mineralogy GA MJ529 UT WOS:A1993MJ52900001 ER PT J AU BISH, DL GUTHRIE, GD AF BISH, DL GUTHRIE, GD TI MINERALOGY OF CLAY AND ZEOLITE DUSTS (EXCLUSIVE OF 1/1 LAYER SILICATES) SO REVIEWS IN MINERALOGY LA English DT Review ID CRYSTAL X-RAY; HYDROUS OXIDES; ADSORPTION; REFINEMENT; GOETHITE; MOLECULES; GIBBSITE; CLINOPTILOLITE; MORDENITE; PHOSPHATE RP BISH, DL (reprint author), LOS ALAMOS NATL LAB, GEOL & GEOCHEM GRP, EES-1, LOS ALAMOS, NM 87545 USA. NR 95 TC 3 Z9 3 U1 0 U2 2 PU MINERALOGICAL SOC AMER PI CHANTILLY PA 3635 CONCORDE PKWY STE 500, CHANTILLY, VA 20151-1125 USA SN 0275-0279 J9 REV MINERAL JI Rev. Mineral. PY 1993 VL 28 BP 139 EP 184 PG 46 WC Mineralogy SC Mineralogy GA MJ529 UT WOS:A1993MJ52900004 ER PT J AU CHIPERA, SJ GUTHRIE, GD BISH, DL AF CHIPERA, SJ GUTHRIE, GD BISH, DL TI PREPARATION AND PURIFICATION OF MINERAL DUSTS SO REVIEWS IN MINERALOGY LA English DT Review RP CHIPERA, SJ (reprint author), LOS ALAMOS NATL LAB, GEOL & GEOCHEM GRP, EES-1, LOS ALAMOS, NM 87545 USA. NR 8 TC 2 Z9 2 U1 0 U2 2 PU MINERALOGICAL SOC AMER PI CHANTILLY PA 3635 CONCORDE PKWY STE 500, CHANTILLY, VA 20151-1125 USA SN 0275-0279 J9 REV MINERAL JI Rev. Mineral. PY 1993 VL 28 BP 235 EP 249 PG 15 WC Mineralogy SC Mineralogy GA MJ529 UT WOS:A1993MJ52900006 ER PT J AU GUTHRIE, GD AF GUTHRIE, GD TI MINERAL CHARACTERIZATION IN BIOLOGICAL STUDIES SO REVIEWS IN MINERALOGY LA English DT Review ID X-RAY-DIFFRACTION; ION-MICROPROBE ANALYSIS; QUANTITATIVE INTERPRETATION; POWDER DIFFRACTION; ERIONITE EXPOSURE; FIBER-FORMATION; ASBESTOS; ELECTRON; PATTERNS; MIXTURES RP GUTHRIE, GD (reprint author), LOS ALAMOS NATL LAB, MAIL STOP D462, LOS ALAMOS, NM 87545 USA. NR 85 TC 0 Z9 0 U1 0 U2 0 PU MINERALOGICAL SOC AMER PI CHANTILLY PA 3635 CONCORDE PKWY STE 500, CHANTILLY, VA 20151-1125 USA SN 0275-0279 J9 REV MINERAL JI Rev. Mineral. PY 1993 VL 28 BP 251 EP 273 PG 23 WC Mineralogy SC Mineralogy GA MJ529 UT WOS:A1993MJ52900007 ER PT J AU LEHNERT, BE AF LEHNERT, BE TI DEFENSE-MECHANISMS AGAINST INHALED PARTICLES AND ASSOCIATED PARTICLE-CELL INTERACTIONS SO REVIEWS IN MINERALOGY LA English DT Review ID HUMAN ALVEOLAR MACROPHAGES; ALTERNATIVE COMPLEMENT PATHWAY; PULMONARY HOST DEFENSES; LONG-TERM CLEARANCE; OPSONIN-INDEPENDENT PHAGOCYTOSIS; NEUTROPHIL CHEMOTACTIC FACTOR; CHRYSOTILE ASBESTOS FIBERS; MONOCYTE-DEPLETED MICE; RESPIRATORY-TRACT; CIGARETTE-SMOKE RP LEHNERT, BE (reprint author), LOS ALAMOS NATL LAB, DIV LIFE SCI, DAMAGE & REPAIR GRP, PULM BIOL TOXICOL PROGRAM CELL GROWTH, LOS ALAMOS, NM 87545 USA. NR 238 TC 2 Z9 2 U1 0 U2 3 PU MINERALOGICAL SOC AMER PI CHANTILLY PA 3635 CONCORDE PKWY STE 500, CHANTILLY, VA 20151-1125 USA SN 0275-0279 J9 REV MINERAL JI Rev. Mineral. PY 1993 VL 28 BP 427 EP 469 PG 43 WC Mineralogy SC Mineralogy GA MJ529 UT WOS:A1993MJ52900014 ER PT J AU GOLDMAN, AI KELTON, RF AF GOLDMAN, AI KELTON, RF TI QUASI-CRYSTALS AND CRYSTALLINE APPROXIMANTS SO REVIEWS OF MODERN PHYSICS LA English DT Note ID TWO-DIMENSIONAL QUASICRYSTAL; AL-LI-CU; ICOSAHEDRAL QUASI-CRYSTAL; TRANSLATIONAL SYMMETRY; ROTATIONAL SYMMETRY; ORDERED STRUCTURES; MN QUASICRYSTALS; FOURIER-ANALYSIS; PHASON STRAIN; TI ALLOYS AB Over the past seven years, many examples of periodic crystals closely related to quasicrystalline alloys have been discovered. These crystals have been termed approximants, since the arrangements of atoms within their unit cells closely approximate the local atomic structures in quasicrystals. This colloquium focuses on these approximant structures, their description, and their relationship to quasicrystals. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130. RP GOLDMAN, AI (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 111 TC 197 Z9 199 U1 1 U2 30 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0034-6861 J9 REV MOD PHYS JI Rev. Mod. Phys. PD JAN PY 1993 VL 65 IS 1 BP 213 EP 230 DI 10.1103/RevModPhys.65.213 PG 18 WC Physics, Multidisciplinary SC Physics GA KM360 UT WOS:A1993KM36000006 ER PT J AU WIRINGA, RB AF WIRINGA, RB TI FROM DEUTERONS TO NEUTRON-STARS - VARIATIONS IN NUCLEAR MANY-BODY THEORY SO REVIEWS OF MODERN PHYSICS LA English DT Note ID GROUND-STATE; MATTER; LIQUID-HE-4; POTENTIALS; SYSTEMS; 3-BODY; ENERGY; FORCE; O-16 AB A major goal in nuclear physics is to understand the stability, structure, and reactions of nuclei as a consequence of the interactions between individual nucleons. This colloquium describes one attempt to build a consistent picture of nuclear systems ranging in size from deuterons to neutron stars. The main ingredients are a nonrelativistic Hamiltonian containing two- and three-nucleon interactions, and correlated variational wave functions as approximate solutions of the many-body Schrodinger equation. A model that fits both two-body scattering data and nuclear masses will provide the best theoretical input for neutron star properties. RP WIRINGA, RB (reprint author), ARGONNE NATL LAB, DIV PHYS, ARGONNE, IL 60439 USA. RI Wiringa, Robert/M-4970-2015 NR 52 TC 37 Z9 37 U1 0 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0034-6861 EI 1539-0756 J9 REV MOD PHYS JI Rev. Mod. Phys. PD JAN PY 1993 VL 65 IS 1 BP 231 EP 242 DI 10.1103/RevModPhys.65.231 PG 12 WC Physics, Multidisciplinary SC Physics GA KM360 UT WOS:A1993KM36000007 ER PT J AU CATANESE, AV PERLACK, RD AF CATANESE, AV PERLACK, RD TI REFORESTATION IN HAITI SO REVUE CANADIENNE D ETUDES DU DEVELOPPEMENT-CANADIAN JOURNAL OF DEVELOPMENT STUDIES LA English DT Article AB This paper examines the economics of increasing fuelwood supplies in Haiti. To place the analysis in perspective, the paper discusses Haiti's characteristics that pose a challenge to increasing fuelwood supplies as well as previous efforts at reforestation. The results suggest that given Haiti's physical conditions, competition for land, and low fuelwood prices, tree cropping by individual peasant farmers does not appear to be in their best financial interest. Recent efforts aimed at encouraging farmers to plant trees will unlikely have any meaningful impact on reducing the rate of deforestation in Haiti. C1 OAK RIDGE NATL LAB,DIV ENERGY,OAK RIDGE,TN 37831. RP CATANESE, AV (reprint author), DEPAUW UNIV,DEPT ECON,GREENCASTLE,IN, USA. NR 29 TC 2 Z9 2 U1 1 U2 13 PU INST INT DEV CO-OP PI OTTAWA PA UNIV OTTAWA 25 UNIVERSITE, OTTAWA ON K1N 6N5, CANADA SN 0225-5189 J9 REV CAN ETUD DEV JI Rev. Can. Etud. Dev.-Can. J. Dev. Stud. PY 1993 VL 14 IS 1 BP 59 EP 72 PG 14 WC Planning & Development SC Public Administration GA LG462 UT WOS:A1993LG46200005 ER PT B AU OGLETREE, DF SAUTET, P DUNPHY, JC SALMERON, M AF OGLETREE, DF SAUTET, P DUNPHY, JC SALMERON, M BE Williams, CC TI QUANTITATIVE-ANALYSIS OF SCANNING-TUNNELING-MICROSCOPY IMAGES FOR SURFACE-STRUCTURE DETERMINATION - SULFUR ON RE(0001) SO SCANNING PROBE MICROSCOPIES II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Scanning Probe Microscopies II CY JAN 18-19, 1993 CL LOS ANGELES, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RI Ogletree, D Frank/D-9833-2016 OI Ogletree, D Frank/0000-0002-8159-0182 NR 0 TC 1 Z9 1 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1081-0 J9 P SOC PHOTO-OPT INS PY 1993 VL 1855 BP 106 EP 117 DI 10.1117/12.146367 PG 12 WC Microscopy SC Microscopy GA BZ73Y UT WOS:A1993BZ73Y00013 ER PT J AU HOFFECKER, JF POWERS, WR GOEBEL, T AF HOFFECKER, JF POWERS, WR GOEBEL, T TI THE COLONIZATION OF BERINGIA AND THE PEOPLING OF THE NEW-WORLD SO SCIENCE LA English DT Article ID CENTRAL ALASKA; PLEISTOCENE; AMERICA; AGE; SETTLEMENT; ARCHAEOLOGY; RECORD; YUKON; SITES AB The colonization of Beringia appears closely linked to the arrival of the oldest firmly documented archeological tradition in mid-latitude North America (Paleoindian). The discovery of a Paleoindian complex in central Alaska, combined with the recent redating of the Bering Land Bridge and key archeological sites, suggests that Beringia was settled during the final Pleistocene interstadial (12,000 to 11,000 years before present). Its population expanded rapidly into other parts of the New World. Beringia probably was colonized in response to changes in climate and vegetation that occurred during this interstadial. Access to the Americas was controlled by Beringian environments and not by changing sea levels or continental ice masses. C1 UNIV ALASKA,DEPT ANTHROPOL,FAIRBANKS,AK 99775. RP HOFFECKER, JF (reprint author), ARGONNE NATL LAB,DIV ENVIRONM ASSESSMENT & INFORMAT SCI,ARGONNE,IL 60439, USA. RI Goebel, Ted/A-7051-2009 NR 111 TC 111 Z9 112 U1 0 U2 17 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD JAN 1 PY 1993 VL 259 IS 5091 BP 46 EP 53 DI 10.1126/science.259.5091.46 PG 8 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KE601 UT WOS:A1993KE60100024 PM 17757472 ER PT J AU MACDONALD, RW CARMACK, EC WALLACE, DWR AF MACDONALD, RW CARMACK, EC WALLACE, DWR TI TRITIUM AND RADIOCARBON DATING OF CANADA BASIN DEEP WATERS SO SCIENCE LA English DT Article ID ARCTIC-OCEAN; NANSEN BASIN; VENTILATION; TRANSPORT; RATES C1 BROOKHAVEN NATL LAB, DEPT APPL SCI, DIV OCEANOG & ATMOSPHER SCI, UPTON, NY 11973 USA. RP FISHERIES & OCEANS CANADA INST OCEAN SCI, POB 6000, SIDNEY V8L 4B2, BC, CANADA. RI Macdonald, Robie/A-7896-2012 OI Macdonald, Robie/0000-0002-1141-8520 NR 12 TC 40 Z9 40 U1 1 U2 5 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 EI 1095-9203 J9 SCIENCE JI Science PD JAN 1 PY 1993 VL 259 IS 5091 BP 103 EP 104 DI 10.1126/science.259.5091.103 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KE601 UT WOS:A1993KE60100040 PM 17757476 ER PT J AU FOECKE, T MARSH, PG MOODY, NR GERBERICH, WW AF FOECKE, T MARSH, PG MOODY, NR GERBERICH, WW TI A SAMPLE FABRICATION-INDUCED HYDROGEN ARTIFACT IN FRACTURE EXPERIMENTS SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID BRITTLE C1 UNIV MINNESOTA,DEPT CHEM ENGN & MAT SCI,MINNEAPOLIS,MN 55455. SANDIA NATL LABS,LIVERMORE,CA 94550. NR 6 TC 3 Z9 3 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD JAN 1 PY 1993 VL 28 IS 1 BP 77 EP 80 DI 10.1016/0956-716X(93)90540-9 PG 4 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KD761 UT WOS:A1993KD76100014 ER PT J AU HENSHALL, GA KASSNER, ME MCQUEEN, HJ AF HENSHALL, GA KASSNER, ME MCQUEEN, HJ TI DYNAMIC RECRYSTALLIZATION DURING HOT COMPRESSION IN AL-MG ALLOY - COMMENTS SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID ELEVATED-TEMPERATURES; ALUMINUM; DEFORMATION; CREEP; MICROSTRUCTURE; STRAINS; STRESS; EVOLUTION; GLIDE C1 OREGON STATE UNIV,DEPT MECH ENGN,CORVALLIS,OR 97331. CONCORDIA UNIV,DEPT MECH ENGN,MONTREAL H3G 1M8,QUEBEC,CANADA. RP HENSHALL, GA (reprint author), LAWRENCE LIVERMORE NATL LAB,LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. NR 25 TC 7 Z9 7 U1 1 U2 11 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD JAN 1 PY 1993 VL 28 IS 1 BP 151 EP 156 DI 10.1016/0956-716X(93)90554-6 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KD761 UT WOS:A1993KD76100028 ER PT B AU LILIENTALWEBER, Z GUPTA, S SMITH, F AF LILIENTALWEBER, Z GUPTA, S SMITH, F BE Miner, CJ Ford, W Weber, ER TI RELATION BETWEEN STRUCTURE AND LIFETIME OF MINORITY-CARRIERS IN MBE GAAS GROWN AT LOW-TEMPERATURES SO SEMI-INSULATING III-V MATERIALS, IXTAPA, MEXICO 1992 LA English DT Proceedings Paper CT 7th Conference on Semi-Insulating III-V Materials CY APR 21-24, 1992 CL IXTAPA, MEXICO SP IEEE, ELECTRON DEVICES DIV C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 0 TC 1 Z9 1 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX BN 0-7503-0242-9 PY 1993 BP 135 EP 140 PG 6 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA BZ43V UT WOS:A1993BZ43V00020 ER PT B AU WERNER, P LILIENTALWEBER, Z YU, KM WEBER, ER METZGER, R AF WERNER, P LILIENTALWEBER, Z YU, KM WEBER, ER METZGER, R BE Miner, CJ Ford, W Weber, ER TI STRUCTURE INVESTIGATIONS OF LOW-TEMPERATURE MBE GROWN INALAS LAYERS ON INP(001) SUBSTRATE SO SEMI-INSULATING III-V MATERIALS, IXTAPA, MEXICO 1992 LA English DT Proceedings Paper CT 7th Conference on Semi-Insulating III-V Materials CY APR 21-24, 1992 CL IXTAPA, MEXICO SP IEEE, ELECTRON DEVICES DIV C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX BN 0-7503-0242-9 PY 1993 BP 167 EP 170 PG 4 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA BZ43V UT WOS:A1993BZ43V00025 ER PT J AU DAVIES, G HARTUNG, J OZHOGIN, V ITOH, K HANSEN, WL HALLER, EE AF DAVIES, G HARTUNG, J OZHOGIN, V ITOH, K HANSEN, WL HALLER, EE TI EFFECTS OF ISOTOPE DISORDER ON PHONONS IN GERMANIUM DETERMINED FROM BOUND EXCITON LUMINESCENCE SO SEMICONDUCTOR SCIENCE AND TECHNOLOGY LA English DT Letter AB The effects of isotope disorder on the energies of the transverse acoustic (TA(L)), longitudinal acoustic (LA(L)) and transverse optical (TO(L)) phonons at the L point have been investigated using the luminescence of excitons bound to copper acceptors. In a sample with approximately equal Ge-70 and Ge-76 the TO(L) phonon is 0.14 +/- 0.03 meV higher in energy than expected for a crystal of the same mean atomic mass, while the LA(L) phonon is 0.07 +/- 0.03 meV lower in energy; the TO(L) phonon is also broadened by 0.4 meV. In this disordered sample the Cu no-phonon line is 0.05 +/- 0.02 meV higher than expected. C1 IV KURCHATOV ATOM ENERGY INST,MOSCOW 123182,RUSSIA. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,BERKELEY,CA 94720. RP DAVIES, G (reprint author), UNIV LONDON KINGS COLL,DEPT PHYS,LONDON WC2R 2LS,ENGLAND. RI Itoh, Kohei/C-5738-2014 NR 12 TC 15 Z9 15 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0268-1242 J9 SEMICOND SCI TECH JI Semicond. Sci. Technol. PD JAN PY 1993 VL 8 IS 1 BP 127 EP 130 DI 10.1088/0268-1242/8/1/021 PG 4 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Condensed Matter SC Engineering; Materials Science; Physics GA KJ707 UT WOS:A1993KJ70700021 ER PT J AU CONBOY, JG AF CONBOY, JG TI STRUCTURE, FUNCTION, AND MOLECULAR-GENETICS OF ERYTHROID MEMBRANE SKELETAL PROTEIN-4.1 IN NORMAL AND ABNORMAL RED-BLOOD-CELLS SO SEMINARS IN HEMATOLOGY LA English DT Article ID INSERTION DELETION MUTATIONS; HEREDITARY ELLIPTOCYTOSIS; BAND 4.1; MESSENGER-RNA; SHORTENED VARIANT; BINDING DOMAIN; BETA-SPECTRIN; CDNA CLONING; SEX-LETHAL; KINASE-C RP CONBOY, JG (reprint author), LAWRENCE BERKELEY LAB,DIV LIFE SCI,1 CYCLOTRON RD,BLDG 74-157,BERKELEY,CA 94720, USA. NR 77 TC 109 Z9 109 U1 0 U2 2 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0037-1963 J9 SEMIN HEMATOL JI Semin. Hematol. PD JAN PY 1993 VL 30 IS 1 BP 58 EP 73 PG 16 WC Hematology SC Hematology GA KG279 UT WOS:A1993KG27900005 PM 8434260 ER PT J AU RICCO, AJ MARTIN, SJ AF RICCO, AJ MARTIN, SJ TI MULTIPLE-FREQUENCY SAW DEVICES FOR CHEMICAL SENSING AND MATERIALS CHARACTERIZATION SO SENSORS AND ACTUATORS B-CHEMICAL LA English DT Article; Proceedings Paper CT 6TH INTERNATIONAL CONF ON SOLID STATE SENSORS AND ACTUATORS ( TRANSDUCERS 91 ) CY JUN 24-28, 1991 CL SAN FRANCISCO, CA ID SENSOR AB We have designed, tested, and demonstrated the use of two types of multiple-frequency surface acoustic wave (SAW) device for chemical detection and characterization of thin-film properties. These devices, both of which utilize ST-cut quartz substrates, allow the frequency dependence of SAW sensor perturbations to be examined, aiding in the elucidation of the operative interaction mechanism(s). A four-frequency device with nominal SAW center frequencies of 16, 40, 100, and 250 MHz is designed in such a way that all four sets of transducers probe a common region of a thin film deposited in the wave path. A seven-frequency SAW device is designed and fabricated with nominal Rayleigh-wave center frequencies ranging from 25 to 200 MHz in square-root 2 multiples; each pair of transducers probes a distinct region of a thin film on the active area of the device. For the seven-frequency device, transducer periodicity, finger length, and center-to-center transducer separation all scale with the reciprocal of the center frequency. Measurements of the SAW response to the vacuum deposition of a thin nickel film show the expected frequency dependence of mass sensitivity and the acoustoelectric effect. Coating multifrequency devices with a thin polymer film allows the frequency-dependent changes in the viscoelastic properties of the polymer to be studied as a function of temperature and of the concentration of various organic solvents, which in tum provides a means for selective chemical detection of these compounds. By measuring changes in both wave velocity and attenuation at multiple frequencies, extrinsic perturbations such as temperature and pressure changes are readily differentiated from one another and from changes in surface mass and other perturbations. RP RICCO, AJ (reprint author), SANDIA NATL LABS,DEPT MICROSENSOR 1315,TECH STAFF,ALBUQUERQUE,NM 87185, USA. RI Ricco, Antonio/A-5273-2010; OI Ricco, Antonio/0000-0002-2355-4984 NR 17 TC 28 Z9 28 U1 0 U2 10 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-4005 J9 SENSOR ACTUAT B-CHEM JI Sens. Actuator B-Chem. PD JAN PY 1993 VL 10 IS 2 BP 123 EP 131 DI 10.1016/0925-4005(93)80035-A PG 9 WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation SC Chemistry; Electrochemistry; Instruments & Instrumentation GA KE466 UT WOS:A1993KE46600008 ER PT J AU CHRISTENSEN, WH SINHA, DN AGNEW, SF AF CHRISTENSEN, WH SINHA, DN AGNEW, SF TI CONDUCTIVITY OF POLYSTYRENE FILM UPON EXPOSURE TO NITROGEN-DIOXIDE - A NOVEL NO2 SENSOR SO SENSORS AND ACTUATORS B-CHEMICAL LA English DT Article ID DINITROGEN AB A novel NO2 sensing device has been developed based on a reversible change in d.c. conductivity in an otherwise insulating film of polystyrene upon exposure to NO2 gas. The device consists of a polystyrene film-coated interdigitated electrode, for which several orders of magnitude increase in conductivity occurs when an NO2/N2 mixture, 1:10 v/v, comes into contact with the film. This rapid (2 min) change in conductivity is reversible and is not associated with any irreversible decomposition of the film. The conductivity of the film is believed to be due to the self-ionization of N2O4, the form of NO2 within the film, to NO+NO3-, with the appropriate anodic and cathodic electrochemistry; it is therefore extremely selective for NO2. C1 LOS ALAMOS NATL LAB,ELECTR MAT & DEVICE RES GRP MEE11,MAIL STOP D429,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,INORGAN & STRUCT CHEM GRP INC14,LOS ALAMOS,NM 87545. NR 11 TC 6 Z9 6 U1 0 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-4005 J9 SENSOR ACTUAT B-CHEM JI Sens. Actuator B-Chem. PD JAN PY 1993 VL 10 IS 2 BP 149 EP 153 DI 10.1016/0925-4005(93)80039-E PG 5 WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation SC Chemistry; Electrochemistry; Instruments & Instrumentation GA KE466 UT WOS:A1993KE46600012 ER PT J AU SACHLEBEN, RA MOYER, BA CASE, FI GARMON, SA AF SACHLEBEN, RA MOYER, BA CASE, FI GARMON, SA TI ALKYLATED LARIAT ETHERS AS SOLVENT-EXTRACTION REAGENTS - SURVEYING THE EXTRACTION OF ALKALI-METALS BY BIS-T-OCTYLBENZO-14-CROWN-4-ACETIC ACID BY USE OF POTENTIOMETRIC 2-PHASE TITRATION SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 7TH SYMP ON SEPARATION SCIENCE AND TECHNOLOGY FOR ENERGY APPLICATIONS CY OCT 20-24, 1991 CL KNOXVILLE, TN SP US DOE, AMER CHEM SOC, AMER INST CHEM ENGINEERS, OAK RIDGE NATL LAB ID MEMBRANE-TRANSPORT SYSTEMS; CARBOXYLIC-ACIDS; CROWN ETHERS; MACROCYCLIC POLYETHERS; CARBON-TETRACHLORIDE; AQUEOUS-SOLUTIONS; SPECTRAL EVIDENCE; EARTH CATIONS; COMPLEXATION; IONS AB Two-phase potentiometric titrimetry was used to survey the extraction of alkali metal cations from aqueous chloride solution by the lipophilic, ionizable lariat ether bis-(t-octylbenzo)-14-crown-4-acetic acid (BOB14C4AA) in o-xylene. Analysis of the data indicates that ion-exchange extraction by the crown-carboxylic acid at low loading (i.e., low conversion of BOB14C4AA to its salt form) is stronger for lithium ion than for the other alkali metals. Little or no selectivity occurs at high loadings. In comparison with the long-chain carboxylic acid 2-methyl-1-heptylnonanoic acid (HMHN), BOB14C4AA extracts lithium and sodium at significantly lower pH; in the loading range of 0.1 to 0.7, the pH shift is 1.4-1.8 pH units for sodium ion and 1.7-2.3 pH units for lithium ion. The titration data are interpreted in terms of aggregated organic-phase species. In the case of lithium extraction, clear evidence was found for a species in which neutral BOB14C4AA participates in the organic-phase complexation of the metal cation. RP SACHLEBEN, RA (reprint author), OAK RIDGE NATL LAB,DIV CHEM,POB 2008,OAK RIDGE,TN 37831, USA. RI Solominow, Sonia/A-4021-2008; Moyer, Bruce/L-2744-2016 OI Moyer, Bruce/0000-0001-7484-6277 NR 54 TC 6 Z9 6 U1 0 U2 1 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 1 EP 23 DI 10.1080/01496399308019476 PG 23 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400002 ER PT J AU NASH, KL RICKERT, PG AF NASH, KL RICKERT, PG TI THERMALLY UNSTABLE COMPLEXANTS - STABILITY OF LANTHANIDE ACTINIDE COMPLEXES, THERMAL-INSTABILITY OF THE LIGANDS, AND APPLICATIONS IN ACTINIDE SEPARATIONS SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 7TH SYMP ON SEPARATION SCIENCE AND TECHNOLOGY FOR ENERGY APPLICATIONS CY OCT 20-24, 1991 CL KNOXVILLE, TN SP US DOE, AMER CHEM SOC, AMER INST CHEM ENGINEERS, OAK RIDGE NATL LAB ID METHANE DIPHOSPHONIC ACIDS; SUPPORTED LIQUID MEMBRANES; GROUNDWATER; REMOVAL; URANIUM AB Water soluble complexing agents are commonly used in separations to enhance the selectivity of both ion exchange and solvent extraction processes. Application of this type in the treatment of nuclear wastes using conventional complexing agents have found mixed success due to the nature of the complexants. In addition, the residual solutions containing these species have led to potentially serious complications in waste storage. To overcome some of the limitations of carboxylic and and aminopolycarboxylate ligands, we have initiated a program to investigate the complexing ability, thermal/oxidative instability, and separation potential of a group of water soluble organophosphorus compounds which we call Thermally Unstable Complexants, or simply TUCS. Complexants of this type appear to be superior to conventional analogues in a number of respects. In this report, we will summarize our research to date on the actinide/lanthanide complexes with a series of substituted methanediphosphonic acids, the kinetics of their oxidative decomposition, and a few applications which have been developed for their use. RP NASH, KL (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 20 TC 20 Z9 20 U1 2 U2 6 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 25 EP 41 DI 10.1080/01496399308019477 PG 17 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400003 ER PT J AU LUMETTA, GJ SWANSON, JL AF LUMETTA, GJ SWANSON, JL TI EVALUATION OF 1-HYDROXYETHANE-1,1-DIPHOSPHONIC ACID AND SODIUM-CARBONATE AS STRIPPING AGENTS FOR THE REMOVAL OF AM(III) AND PU(IV) FROM TRUEX PROCESS SOLVENT SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 7TH SYMP ON SEPARATION SCIENCE AND TECHNOLOGY FOR ENERGY APPLICATIONS CY OCT 20-24, 1991 CL KNOXVILLE, TN SP US DOE, AMER CHEM SOC, AMER INST CHEM ENGINEERS, OAK RIDGE NATL LAB AB The TRUEX solvent extraction process is being developed for the removal of the transuranic (TRU) elements from some of the wastes stored in tanks at the U.S. Department of Energy's Hanford Site. Initial flowsheets for this process call for the stripping (back extraction) of TRUs with 0. 2 M 1-hydroxyethane-1, 1-diphosphonic acid (HEDPA) followed by washing of the process solvent with 0.25 M sodium carbonate. The stripped TRU stream is to be neutralized with caustic for interim storage in carbon steel tanks prior to vitrification. Such a scenario would result in a considerable amount of phosphorus and sodium in the TRU stream, which could preclude this material from being efficiently vitrified in the proposed Hanford Waste Vitrification Plant (HWVP). An examination of alternative stripping processes suggests that the amount of phosphorus and sodium in the feed to HWVP can be reduced by 1) using a less concentrated solution of HEDPA in the strip step, or 2) using sodium carbonate as the stripping agent. The latter approach would eliminate the introduction of phosphate into the TRU waste stream. It would also greatly simplify the process by combining the strip and solvent wash steps. Furthermore, less caustic would be required to prepare vitrification feed streams for interim storage. A third approach involving the use of a combined sodium carbonate/NaHEDPA solution to strip the TRUs also shows promise. The distribution behaviors of Am(III) and Pu(IV) between HEDPA solutions or sodium carbonate solutions and TRUEX solvent have been examined. Results of stripping experiments using solutions prepared from both spiked and actual Hanford tank wastes are presented in this paper. RP LUMETTA, GJ (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 6 TC 10 Z9 11 U1 1 U2 1 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 43 EP 58 DI 10.1080/01496399308019478 PG 16 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400004 ER PT J AU MOYER, BA BAES, CF CASE, GN LUMETTA, GJ WILSON, NM AF MOYER, BA BAES, CF CASE, GN LUMETTA, GJ WILSON, NM TI EQUILIBRIUM-ANALYSIS OF AGGREGATION BEHAVIOR IN THE SOLVENT-EXTRACTION OF CU(II) FROM SULFURIC-ACID BY DIDODECYLNAPHTHALENE SULFONIC-ACID SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 7TH SYMP ON SEPARATION SCIENCE AND TECHNOLOGY FOR ENERGY APPLICATIONS CY OCT 20-24, 1991 CL KNOXVILLE, TN SP US DOE, AMER CHEM SOC, AMER INST CHEM ENGINEERS, OAK RIDGE NATL LAB ID LIQUID CATION-EXCHANGER; ION-EXCHANGE; METAL-IONS; SYSTEM; MIXTURES; THERMODYNAMICS; ELECTROLYTES; DINONYLNAPHTHALENE; COEFFICIENTS; COMPLEX AB By use of the principles of equilibrium analysis, the liquid-liquid cation exchange of Cu(II) from aqueous sulfuric acid at 25-degrees-C by didodecylnaphthalenesulfonic acid (HDDNS) in toluene may be understood in terms of small hydrated aggregated species in the organic phase. Extraction data have been measured as a function of organic-phase HDDNS molarity (1.0 x 10(-4) to 1.0 x 10(-1)). aqueous copper(II) sulfate molarity (1.2 x 10(-8) to 1.3 x 10(-2)), and aqueous sulfuric acid molarity (0.03 to 6.0). Graphical analysis of linear regions of the data support a model in which organic-phase aggregates of HDDNS function by cation exchange to incorporate Cu(II) ions with no apparent change in aggregation number at low loading. Supporting FTIR spectra and water-content measurements of HDDNS solutions in toluene show that the HDDNS aggregates are highly hydrated. By use of the computer program SXLSQA, a comprehensive equilibrium model was developed with inclusion of activity effects. Aqueous-phase activity coefficients and degree of aqueous bisulfate formation were estimated by use of the Pitzer treatment. Organic-phase nonideality was estimated by the Hildebrand-Scott treatment and was shown to be a negligible effect under the conditions tested. Excluding aqueous sulfuric acid molarities greater than 1, it was possible to model the data to within experimental error by assuming only the equilibrium extraction of Cu2+ ion by the aggregate (HDDNS)4(H2O)22 and the equilibrium dissociation of (HDDNS)4(H2O)22 to the monomer. The dependence of Cu(II) distribution on aqueous sulfuric acid molarity was shown to be quantitatively consistent with a cation-exchange process. In comparison with the graphical approach, the computer analysis allows comprehensive model testing over large, nonlinear data sets and eliminates the need to make limiting assumptions. Overall, the results provide useful insight toward the development of selective synergistic extraction systems in which HDDNS provides a nonselective cation-exchange vehicle in combination with a selective second extractant. RP MOYER, BA (reprint author), OAK RIDGE NATL LAB,DIV CHEM,POB 2008,OAK RIDGE,TN 37831, USA. RI Solominow, Sonia/A-4021-2008; Moyer, Bruce/L-2744-2016 OI Moyer, Bruce/0000-0001-7484-6277 NR 59 TC 19 Z9 19 U1 0 U2 5 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 81 EP 113 DI 10.1080/01496399308019480 PG 33 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400006 ER PT J AU LEONARD, RA WYGMANS, DG MCELWEE, MJ WASSERMAN, MO VANDEGRIFT, GF AF LEONARD, RA WYGMANS, DG MCELWEE, MJ WASSERMAN, MO VANDEGRIFT, GF TI THE CENTRIFUGAL CONTACTOR AS A CONCENTRATOR IN SOLVENT-EXTRACTION PROCESSES SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 7TH SYMP ON SEPARATION SCIENCE AND TECHNOLOGY FOR ENERGY APPLICATIONS CY OCT 20-24, 1991 CL KNOXVILLE, TN SP US DOE, AMER CHEM SOC, AMER INST CHEM ENGINEERS, OAK RIDGE NATL LAB ID TRUEX PROCESS AB The possibility was explored of using solvent extraction in centrifugal contactors to concentrate metal ions from a waste stream when their distribution ratio values are favorable. The theoretical basis for such a concentrator was developed and is presented here, along with experimental results which show that a centrifugal contactor is capable of acting as such a concentrator. RP LEONARD, RA (reprint author), ARGONNE NATL LAB,DIV CHEM TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 10 TC 10 Z9 10 U1 0 U2 2 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 177 EP 200 DI 10.1080/01496399308019485 PG 24 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400011 ER PT J AU PETERSON, ES STONE, ML CUMMINGS, DG MCCAFFREY, RR AF PETERSON, ES STONE, ML CUMMINGS, DG MCCAFFREY, RR TI SEPARATIONS OF HAZARDOUS ORGANICS FROM GAS AND LIQUID FEEDSTREAMS USING PHOSPHAZENE POLYMER MEMBRANES SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 7TH SYMP ON SEPARATION SCIENCE AND TECHNOLOGY FOR ENERGY APPLICATIONS CY OCT 20-24, 1991 CL KNOXVILLE, TN SP US DOE, AMER CHEM SOC, AMER INST CHEM ENGINEERS, OAK RIDGE NATL LAB AB In this paper the liquid-liquid and gas separation properties for the separation of hazardous organic feed streams using pervaporation and gas separation methods with poly(bis(phenoxy)phosphazene] based membranes are reported. Liquid transport behavior was determined using pervaporation techniques. The preliminary gas separations were studied using a mixed gas separation method which we have described previously. Using the membrane pervaporation technique, separation factors of 10,000 have been routinely achieved for the separation of methylene chloride from water. Other tests have shown similar results for the removal of hydrocarbon vapors from air. Membranes were prepared using solution casting techniques. Solvent evaporation rates during the casting and subsequent curing processes were controlled to provide a consistent membrane microstructure. These results suggest that polyphosphazene membrane technology could effectively be used in cleaning up air and ground water that has been contaminated with chlorinated hydrocarbons. RP PETERSON, ES (reprint author), IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. RI Peterson, Eric/B-9127-2017 OI Peterson, Eric/0000-0002-2292-4939 NR 23 TC 26 Z9 27 U1 0 U2 2 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 271 EP 281 DI 10.1080/01496399308019490 PG 11 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400016 ER PT J AU PETERSON, ES STONE, ML MCCAFFREY, RR CUMMINGS, DG AF PETERSON, ES STONE, ML MCCAFFREY, RR CUMMINGS, DG TI MIXED-GAS SEPARATION PROPERTIES OF PHOSPHAZENE POLYMER MEMBRANES SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 7TH SYMP ON SEPARATION SCIENCE AND TECHNOLOGY FOR ENERGY APPLICATIONS CY OCT 20-24, 1991 CL KNOXVILLE, TN SP US DOE, AMER CHEM SOC, AMER INST CHEM ENGINEERS, OAK RIDGE NATL LAB AB In this paper the mixed-gas separation properties of poly[bis(phenoxy)phosphazene] based polymers are reported. Transport behavior was determined using the variable volume technique. Test gases were run as mixed-gas pairs including SO2/N2, H2S/CH4, and CO2/CH4. Transport of these gases was found to be a sorption controlled process since these gases significantly deviated from the diffusion controlled permeability-size correlation. Membranes were prepared using solution casting techniques. Solvent evaporation rate during the casting and subsequent curing processes was controlled to provide a consistent membrane microstructure. We have observed that polyphosphazene membranes can effectively be used to separate acid gases from various waste streams in harsh, chemically aggressive environments. RP PETERSON, ES (reprint author), IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. RI Peterson, Eric/B-9127-2017 OI Peterson, Eric/0000-0002-2292-4939 NR 17 TC 26 Z9 26 U1 0 U2 4 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 423 EP 440 DI 10.1080/01496399308019498 PG 18 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400024 ER PT J AU WATSON, JS AF WATSON, JS TI THE EFFECTS OF FLOW THROUGH HIGHLY POROUS ADSORBENTS ON ADSORPTION RATES WITH FAVORABLE (NONLINEAR) ISOTHERMS SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 7TH SYMP ON SEPARATION SCIENCE AND TECHNOLOGY FOR ENERGY APPLICATIONS CY OCT 20-24, 1991 CL KNOXVILLE, TN SP US DOE, AMER CHEM SOC, AMER INST CHEM ENGINEERS, OAK RIDGE NATL LAB AB To increase diffusion rates into adsorbents, efforts are being made to increase the porosity of adsorbents by increasing both the number of porous passages into the particles and the size of those passages. These efforts can eventually result in some flow of fluid through the particles from the pressure drop through the adsorption bed. Earlier papers have pointed out that such flows can contribute to the effective mass transfer rates. This paper extends the earlier studies by considering the effects of nonlinear (favorable) isotherms. RP WATSON, JS (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,POB 2003,OAK RIDGE,TN 37831, USA. NR 7 TC 3 Z9 3 U1 0 U2 0 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 519 EP 532 DI 10.1080/01496399308019504 PG 14 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400030 ER PT J AU DELCUL, GD BOSTICK, WD TROTTER, DR OSBORNE, PE AF DELCUL, GD BOSTICK, WD TROTTER, DR OSBORNE, PE TI TC-99 REMOVAL FROM PROCESS SOLUTIONS AND CONTAMINATED GROUNDWATER SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article AB The predominant form of technetium under oxic conditions is the pertechnetate anion (TcO4-), which is highly soluble in water and readily mobile in the environment. Technetium-99 is of particular concern because of its persistence and mobility. Various equipment decontamination and uranium recovery operations at the Portsmouth Gaseous Diffusion Plant generate a ''raffinate'' waste stream characterized by toxic heavy metals, high concentration of nitric acid, and low levels of radionuclides (U-235 and Tc-99). Dilution and adjustment of solution pH to a value of 8.2 to 8.5 precipitates a heavy-metals-sludge and a filtrate. The removal of Tc-99 from these waste streams and from contaminated groundwater can be accomplished using anionic ion-exchange resins. Batch equilibrium and packed column breakthrough and regeneration studies were performed using inorganic sorbents and organic ion-exchange resins (Dowex SRB-OH and Reillex resins). These studies were performed on actual and surrogate raw raffinates, filtrates, and surrogate groundwater samples. The experimental conditions were chosen to closely represent the actual process. RP DELCUL, GD (reprint author), DEPT CHEM, DIV TECH, OAK RIDGE K-25 SITE, POB 2003, OAK RIDGE, TN 37831 USA. NR 14 TC 27 Z9 27 U1 1 U2 13 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 0149-6395 J9 SEP SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 551 EP 564 PG 14 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400032 ER PT J AU PERONA, JJ BYERS, CH PRAZNIAK, JK AF PERONA, JJ BYERS, CH PRAZNIAK, JK TI VACUUM SORPTION PUMPING STUDIES OF ARGON AND OXYGEN ON 4A MOLECULAR-SIEVES SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 7TH SYMP ON SEPARATION SCIENCE AND TECHNOLOGY FOR ENERGY APPLICATIONS CY OCT 20-24, 1991 CL KNOXVILLE, TN SP US DOE, AMER CHEM SOC, AMER INST CHEM ENGINEERS, OAK RIDGE NATL LAB ID GASES AB Cryosorption pumping is a method of evacuating enclosed volumes by adsorbing gas on a deep bed of sorbent, such as Davison 4A zeolite, at cryogenic temperatures. Modeling the dynamic behavior of these systems for air pumping requires information on two major constituents of air: oxygen and argon. Particle size variation was the major variable in determining the mechanism of the process. The model comprises a fluid-phase mass balance representing the dynamics of gas in the bed and a spherical, one-dimensional diffusion equation describing adsorption in pellets of 4A zeolite. The present model calculates effective pore diffusivity taking into account Knudsen diffusion, ordinary diffusion, and Poiseuille flow. The primary diffusional resistance appears to occur in the macropores formed by the pelletizing clay binder, rather than in the bed interstices or microporous zeolite crystals. C1 MARTIN MARIETTA ENERGY SYST INC,OAK RIDGE Y12 PLANT,OAK RIDGE,TN 37831. RP PERONA, JJ (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831, USA. NR 11 TC 0 Z9 0 U1 0 U2 2 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 595 EP 614 DI 10.1080/01496399308019509 PG 20 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400035 ER PT J AU KENT, TE ARNOLD, WD PERONA, JJ FOWLER, VL MCTAGGART, DR RICHARDSON, SA AF KENT, TE ARNOLD, WD PERONA, JJ FOWLER, VL MCTAGGART, DR RICHARDSON, SA TI TESTING OF HEXACYANOFERRATES FOR DECONTAMINATION OF RADIOACTIVE WASTEWATERS AT OAK-RIDGE-NATIONAL-LABORATORY SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 7TH SYMP ON SEPARATION SCIENCE AND TECHNOLOGY FOR ENERGY APPLICATIONS CY OCT 20-24, 1991 CL KNOXVILLE, TN SP US DOE, AMER CHEM SOC, AMER INST CHEM ENGINEERS, OAK RIDGE NATL LAB AB Liquid low-level radioactive waste (LLLW) and slightly contaminated process wastewater at Oak Ridge National Laboratory has been tested for removal of Cs-137 using several transition-metal hexacyanoferrate compounds. The method being developed is scavenging precipitation, in which ion exchange particles are mixed with the solutions and allowed to settle. Decontamination factors of 35 for simulated LLLW and 12 for process wastewater were achieved. RP KENT, TE (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,POB 2008,OAK RIDGE,TN 37831, USA. NR 11 TC 5 Z9 5 U1 0 U2 1 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 675 EP 691 DI 10.1080/01496399308019514 PG 17 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400040 ER PT J AU CHAIKO, DJ MENSAHBINEY, R MERTZ, CJ ROLLINS, A AF CHAIKO, DJ MENSAHBINEY, R MERTZ, CJ ROLLINS, A TI BENEFICIATION OF PU RESIDUES BY ULTRAFINE GRINDING AND AQUEOUS BIPHASIC EXTRACTION SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 7TH SYMP ON SEPARATION SCIENCE AND TECHNOLOGY FOR ENERGY APPLICATIONS CY OCT 20-24, 1991 CL KNOXVILLE, TN SP US DOE, AMER CHEM SOC, AMER INST CHEM ENGINEERS, OAK RIDGE NATL LAB AB Aqueous biphase systems are heterogeneous liquid/liquid systems that result from appropriate combinations of inorganic salts and water-soluble polymers such as polyethylene glycol. Colloid-size particles that are suspended in an aqueous biphase system will partition to one of the phases, depending on a complex balancing of particle interactions with the surrounding solvent. With regard to waste treatment applications. aqueous biphase systems are similar to conventional solvent extraction but do not utilize an organic diluent. which may itself become a source of pollution. In addition, the water-soluble polymers that have been used in biphase formation are inexpensive. nontoxic, and biodegradable. The application of aqueous biphasic extraction to the beneficiation of plutonium residues will be discussed. C1 NO ILLINOIS UNIV,DEPT CHEM,DE KALB,IL 60115. RP CHAIKO, DJ (reprint author), ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439, USA. NR 31 TC 8 Z9 8 U1 0 U2 0 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 765 EP 780 DI 10.1080/01496399308019519 PG 16 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400045 ER PT J AU TOTH, LM FELKER, LK HUNT, RD BRUNSON, RR LOGHRY, SL AF TOTH, LM FELKER, LK HUNT, RD BRUNSON, RR LOGHRY, SL TI THE ABSORPTION-SPECTRUM OF UOCL2 IN MOLTEN CHLORIDE SALTS SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 7TH SYMP ON SEPARATION SCIENCE AND TECHNOLOGY FOR ENERGY APPLICATIONS CY OCT 20-24, 1991 CL KNOXVILLE, TN SP US DOE, AMER CHEM SOC, AMER INST CHEM ENGINEERS, OAK RIDGE NATL LAB AB The absorption spectrum of UOCl2 in molten KCl-MgCl2 salts has been measured and compared with that of the related UCl4 spectrum at temperatures up to 932-degrees-C and melt compositions of 60-40,34-66, and 0-100 mol %, respectively, KCl-MgCl2. The species UOCl2 is an important intermediate in the conversion of UO2 to UCl4 and its spectrum provides a means of monitoring the reaction, and other similar reactions, in situ. The solubility Of UOCl2 has been determined from absorption spectra and has been found to be 10 to 25 times higher than reported earlier with mole fractions as high as 0.0019 in pure MgCl2 at 932-degrees-C. RP TOTH, LM (reprint author), OAK RIDGE NATL LAB, DIV CHEM TECHNOL, POB 2008, OAK RIDGE, TN 37831 USA. NR 14 TC 4 Z9 4 U1 1 U2 3 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 1-3 BP 781 EP 792 DI 10.1080/01496399308019520 PG 12 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA KE074 UT WOS:A1993KE07400046 ER PT J AU HAAS, PA AF HAAS, PA TI A NEW APPARATUS FOR CONTINUOUS COUNTERCURRENT-FLOW OF SOLIDS AND LIQUIDS SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article DE MOVING BED; LIQUID SOLIDS CONTACTOR; COUNTERCURRENT FLOW; PARTICULATE WASHING; GEL PROCESS ID GEL AB A contactor was developed to provide true countercurrent, continuous flow of gel spheres and liquid in a moving bed. To provide smooth and controlled movement of solids, the key features consisted of a common cross section for the moving bed and a small fluidized bed, a jet to form a slurry at the bottom of the moving bed, and a controlled flow of part of this slurry to the fluidized bed. A completely continuous pilot plant for preparation of nuclear fuel by a gel-sphere process was operated with three of these moving-bed fluidized-bed contactors. Different control procedures and good countercurrent washing results were demonstrated. RP HAAS, PA (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,POB 2008,OAK RIDGE,TN 37831, USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 8 BP 1579 EP 1594 DI 10.1080/01496399308018059 PG 16 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA LB532 UT WOS:A1993LB53200005 ER PT J AU CHRISWELL, CD RICHARD, JJ AF CHRISWELL, CD RICHARD, JJ TI USE OF ELECTROLYTICALLY GENERATED HYDROGEN AS A PURGE GAS FOR THE ISOLATION OF VOLATILE ORGANIC-COMPOUNDS FROM GROUNDWATER SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Article ID SAMPLES AB A device has been developed for use in determining parts per billion concentrations of volatile organic compounds in groundwater. This device is suitable for field use either as a self-contained, portable instrument or as an unattended monitor. The device consists of an immersible electrolysis cell in which hydrogen is generated. This hydrogen efficiently purges volatile organic compounds from water. Those volatile organic compounds are carried by the purge gas to a photoionization detector where their total concentration is measured. The significant advantages of this apparatus for use in the determination of volatile organic compounds include: 1) measurements are made in a hydrogen matrix which is free of interfering species present in water; 2) detection limits for volatile organic compounds are several orders of magnitude lower when compounds are purged from water than when they are measured in the headspace above water; 3) operation of this device does not require use of reagents or utilities other than electricity, which can be supplied by batteries; 4) the device can be readily configured such that it will fit in a small diameter sampling well; and 5) if used as a monitor in a sampling well, the only required connections with the surface would be signal and power lines. This device has a detection limit of less than 5 ppb for benzene. For 23 other organic compounds tested, response factors ranged from 0.1 to 1.5 times that for benzene. The device appears especially well-suited for use in monitoring the concentration of gasoline in groundwater in the vicinity of underground storage tanks. RP CHRISWELL, CD (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DEPT ENERGY,AMES LAB,AMES,IA 50011, USA. NR 8 TC 1 Z9 1 U1 0 U2 0 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 15-16 BP 2377 EP 2386 DI 10.1080/01496399308019743 PG 10 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA ML406 UT WOS:A1993ML40600005 ER PT J AU HAAS, PA AF HAAS, PA TI A REVIEW OF INFORMATION ON FERROCYANIDE SOLIDS FOR REMOVAL OF CESIUM FROM SOLUTIONS SO SEPARATION SCIENCE AND TECHNOLOGY LA English DT Review ID INORGANIC-ION-EXCHANGERS; POTASSIUM COPPER FERROCYANIDE; ZINC FERROCYANIDES; SORPTION; NICKEL; HEXACYANOFERRATE(II); SEPARATION; ADSORBERS; KINETICS; SORBENTS AB Ferrocyanide solids have important applications to the removal of radioactive cesium from nuclear waste solutions. These materials are prepared by mixing soluble ferrocyanides and salts of divalent transition metals or other divalent cations. The simple precipitations most commonly give very fine particles or slimes of variable compositions. Special preparation procedures have been developed to control the compositions or to prepare granular solids suitable for column operation. The removal of cesium from solutions has been measured for many different ferrocyanide solids. Some of these solids show an exchange of K+, Na+, or NH4+ for cesium, but many show sorptions of cesium without a true ion exchange. The performance for cesium removal is described by measurements of the distribution coefficients for cesium with large excesses of ferrocyanides, the capacity for cesium with excess cesium in solution, and the rates of cesium removal. The chemical and physical stability, the solubility, and the elution or recovery requirements for ferrocyanide solids are important to practical applications. These properties are reviewed along with several of the proposed applications. RP HAAS, PA (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,POB 2008,OAK RIDGE,TN 37831, USA. NR 54 TC 87 Z9 89 U1 4 U2 47 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0149-6395 J9 SEPAR SCI TECHNOL JI Sep. Sci. Technol. PY 1993 VL 28 IS 17-18 BP 2479 EP 2506 DI 10.1080/01496399308017493 PG 28 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA MN103 UT WOS:A1993MN10300001 ER PT S AU TRUETT, LF FABY, EZ GRUBB, JW LOFTIS, JP SHIPE, PC AF TRUETT, LF FABY, EZ GRUBB, JW LOFTIS, JP SHIPE, PC GP IEEE, COMP SOC TI COORDINATION OF SOFTWARE-DEVELOPMENT ACTIVITIES AMONG SITES THAT ARE GEOGRAPHICALLY SEPARATED SO SEVENTEENTH ANNUAL INTERNATIONAL COMPUTER SOFTWARE & APPLICATIONS CONFERENCE SE PROCEEDINGS - INTERNATIONAL COMPUTER SOFTWARE & APPLICATIONS CONFERENCE LA English DT Proceedings Paper CT 17th Annual International Computer Software and Applications Conference (Compsac 93) CY NOV 01-05, 1993 CL PHOENIX, AZ SP IEEE, COMP SOC C1 OAK RIDGE NATL LAB,OAK RIDGE,TN. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 0730-3157 BN 0-8186-4440-0 J9 P INT COMP SOFTW APP PY 1993 BP 70 EP 75 DI 10.1109/CMPSAC.1993.404217 PG 6 WC Computer Science, Software Engineering; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BA39E UT WOS:A1993BA39E00011 ER PT J AU ALPERT, BK AF ALPERT, BK TI A CLASS OF BASES IN L2 FOR THE SPARSE REPRESENTATION OF INTEGRAL-OPERATORS SO SIAM JOURNAL ON MATHEMATICAL ANALYSIS LA English DT Article DE WAVELETS; INTEGRAL EQUATIONS; SPARSE MATRICES ID FAST ALGORITHM; ORTHONORMAL BASES; WAVELETS AB A class of multiwavelet bases for L2 is constructed with the property that a variety of integral operators is represented in these bases as sparse matrices, to high precision. In particular, an integral operator K whose kernel is smooth except along a finite number of singular bands has a sparse representation. In addition, the inverse operator (I - K)-1 appearing in the solution of a second-kind integral equation involving K is often sparse in the new bases. The result is an order O(n log2 n) algorithm for numerical solution of a large class of second-kind integral equations. C1 UNIV CALIF BERKELEY,BERKELEY,CA 94720. RP ALPERT, BK (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 17 TC 201 Z9 212 U1 1 U2 8 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 0036-1410 J9 SIAM J MATH ANAL JI SIAM J. Math. Anal. PD JAN PY 1993 VL 24 IS 1 BP 246 EP 262 DI 10.1137/0524016 PG 17 WC Mathematics, Applied SC Mathematics GA KJ697 UT WOS:A1993KJ69700016 ER PT J AU LIU, JWH NG, EG PEYTON, BW AF LIU, JWH NG, EG PEYTON, BW TI ON FINDING SUPERNODES FOR SPARSE-MATRIX COMPUTATIONS SO SIAM JOURNAL ON MATRIX ANALYSIS AND APPLICATIONS LA English DT Article DE SPARSE CHOLESKY FACTORIZATIONS; ELIMINATION TREES; SUPERNODES ID ELIMINATION TREES; FACTORIZATION AB A simple characterization of fundamental supernodes is given in terms of the row subtrees of sparse Cholesky factors ii, the elimination tree. Using this characterization, an efficient algorithm is presented that determines the set of such supernodes in time proportional to the number of nonzeros and equations in the original matrix. Experimental results verify the practical efficiency of this algorithm. C1 OAK RIDGE NATL LAB,MATH SCI SECT,OAK RIDGE,TN 37831. RP LIU, JWH (reprint author), YORK UNIV,DEPT COMP SCI,N YORK M3J 1P3,ONTARIO,CANADA. NR 18 TC 43 Z9 46 U1 0 U2 2 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 0895-4798 J9 SIAM J MATRIX ANAL A JI SIAM J. Matrix Anal. Appl. PD JAN PY 1993 VL 14 IS 1 BP 242 EP 252 DI 10.1137/0614019 PG 11 WC Mathematics, Applied SC Mathematics GA KJ695 UT WOS:A1993KJ69500019 ER PT J AU ALPERT, B BEYLKIN, G COIFMAN, R ROKHLIN, V AF ALPERT, B BEYLKIN, G COIFMAN, R ROKHLIN, V TI WAVELET-LIKE BASES FOR THE FAST SOLUTION OF 2ND-KIND INTEGRAL-EQUATIONS SO SIAM JOURNAL ON SCIENTIFIC COMPUTING LA English DT Article DE WAVELETS; INTEGRAL EQUATIONS; SPARSE MATRICES; FAST NUMERICAL ALGORITHMS ID FAST ALGORITHM AB A class of vector-space bases is introduced for the sparse representation of discretizations of integral operators. An operator with a smooth, nonoscillatory kernel possessing a finite number of singularities in each row or column is represented in these bases as a sparse matrix, to high precision. A method is presented that employs these bases for the numerical solution of second-kind integral equations in time bounded by O(n log2 n), where n is the number of points in the discretization. Numerical results are given which demonstrate the effectiveness of the approach, and several generalizations and applications of the method are discussed. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MATH,BERKELEY,CA 94720. UNIV COLORADO,PROGRAM APPL MATH,BOULDER,CO 80309. YALE UNIV,DEPT MATH,NEW HAVEN,CT 06520. YALE UNIV,DEPT COMP SCI,NEW HAVEN,CT 06520. RI Beylkin, Gregory/G-6653-2011 NR 14 TC 208 Z9 211 U1 0 U2 6 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 1064-8275 J9 SIAM J SCI COMPUT JI SIAM J. Sci. Comput. PD JAN PY 1993 VL 14 IS 1 BP 159 EP 184 DI 10.1137/0914010 PG 26 WC Mathematics, Applied SC Mathematics GA KP465 UT WOS:A1993KP46500010 ER PT J AU WRIGHT, SJ AF WRIGHT, SJ TI A COLLECTION OF PROBLEMS FOR WHICH GAUSSIAN-ELIMINATION WITH PARTIAL PIVOTING IS UNSTABLE SO SIAM JOURNAL ON SCIENTIFIC COMPUTING LA English DT Article DE 2-POINT BOUNDARY VALUE PROBLEMS; GAUSSIAN ELIMINATION; PARTIAL PIVOTING ID BOUNDARY-VALUE PROBLEMS; STABILITY AB A significant collection of two-point boundary value problems is shown to give rise to linear systems of algebraic equations on which Gaussian elimination with row partial pivoting is unstable when standard solution techniques are used. RP WRIGHT, SJ (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 11 TC 34 Z9 35 U1 0 U2 2 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 1064-8275 J9 SIAM J SCI COMPUT JI SIAM J. Sci. Comput. PD JAN PY 1993 VL 14 IS 1 BP 231 EP 238 DI 10.1137/0914013 PG 8 WC Mathematics, Applied SC Mathematics GA KP465 UT WOS:A1993KP46500013 ER PT S AU WARD, LW AF WARD, LW BE Sharon, A TI AN ANALYSIS AID FOR USE BY A TECHNICAL-SUPPORT TEAM FOR ACCIDENT MANAGEMENT AT NUCLEAR-FACILITIES SO SIMULATORS X SE SIMULATION SERIES LA English DT Proceedings Paper CT 1993 Simulation Multiconference on the International Simulators Conference CY MAR 29-APR 01, 1993 CL ARLINGTON, VA SP SOC COMP SIMULAT, UTIL SIMULATORS USERS GRP, EPRI, FOSSIL SIMULATORS USERS GRP C1 EG&G IDAHO INC,NUCL RES & ENGN,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83401. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC COMPUTER SIMULATION INT PI SAN DIEGO PA PO BOX 17900, SAN DIEGO, CA 92177 SN 0735-9276 BN 1-56555-050-1 J9 SIMUL SERIES PY 1993 VL 25 IS 4 BP 80 EP 86 PG 7 WC Computer Science, Interdisciplinary Applications; Nuclear Science & Technology SC Computer Science; Nuclear Science & Technology GA BA08U UT WOS:A1993BA08U00013 ER PT S AU SIU, NO GERTMAN, DI AF SIU, NO GERTMAN, DI BE Sharon, A TI CONTROL ROOM CREW SIMULATION - 2 PERSPECTIVES SO SIMULATORS X SE SIMULATION SERIES LA English DT Proceedings Paper CT 1993 Simulation Multiconference on the International Simulators Conference CY MAR 29-APR 01, 1993 CL ARLINGTON, VA SP SOC COMP SIMULAT, UTIL SIMULATORS USERS GRP, EPRI, FOSSIL SIMULATORS USERS GRP C1 IDAHO NATL ENGN LAB,RISK ASSESSMENT & APPL MATH GRP,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC COMPUTER SIMULATION INT PI SAN DIEGO PA PO BOX 17900, SAN DIEGO, CA 92177 SN 0735-9276 BN 1-56555-050-1 J9 SIMUL SERIES PY 1993 VL 25 IS 4 BP 115 EP 122 PG 8 WC Computer Science, Interdisciplinary Applications; Nuclear Science & Technology SC Computer Science; Nuclear Science & Technology GA BA08U UT WOS:A1993BA08U00019 ER PT S AU SMITH, CL CALLEY, MB AF SMITH, CL CALLEY, MB BE Sharon, A TI LIMITATIONS IN CALCULATING RISK-BASED ALLOWABLE OUTAGE TIMES AT NUCLEAR-POWER-PLANTS SO SIMULATORS X SE SIMULATION SERIES LA English DT Proceedings Paper CT 1993 Simulation Multiconference on the International Simulators Conference CY MAR 29-APR 01, 1993 CL ARLINGTON, VA SP SOC COMP SIMULAT, UTIL SIMULATORS USERS GRP, EPRI, FOSSIL SIMULATORS USERS GRP C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC COMPUTER SIMULATION INT PI SAN DIEGO PA PO BOX 17900, SAN DIEGO, CA 92177 SN 0735-9276 BN 1-56555-050-1 J9 SIMUL SERIES PY 1993 VL 25 IS 4 BP 321 EP 326 PG 6 WC Computer Science, Interdisciplinary Applications; Nuclear Science & Technology SC Computer Science; Nuclear Science & Technology GA BA08U UT WOS:A1993BA08U00053 ER PT S AU TRUMBLE, EF AF TRUMBLE, EF BE Sharon, A TI COMPUTER-SIMULATION OF THE TIME-DEPENDENT CONTENTS OF A TANK CONTAINING TRANSURANICS SO SIMULATORS X SE SIMULATION SERIES LA English DT Proceedings Paper CT 1993 Simulation Multiconference on the International Simulators Conference CY MAR 29-APR 01, 1993 CL ARLINGTON, VA SP SOC COMP SIMULAT, UTIL SIMULATORS USERS GRP, EPRI, FOSSIL SIMULATORS USERS GRP C1 WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER TECHNOL CTR,AIKEN,SC 29808. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC COMPUTER SIMULATION INT PI SAN DIEGO PA PO BOX 17900, SAN DIEGO, CA 92177 SN 0735-9276 BN 1-56555-050-1 J9 SIMUL SERIES PY 1993 VL 25 IS 4 BP 490 EP 493 PG 4 WC Computer Science, Interdisciplinary Applications; Nuclear Science & Technology SC Computer Science; Nuclear Science & Technology GA BA08U UT WOS:A1993BA08U00081 ER PT S AU GONG, C JERRELL, JW PELFREY, JR YAU, WWF AF GONG, C JERRELL, JW PELFREY, JR YAU, WWF BE Sharon, A TI RESPONSE OF A TYPE-III WASTE TANK TO HYDROGEN DEFLAGRATION (U) SO SIMULATORS X SE SIMULATION SERIES LA English DT Proceedings Paper CT 1993 Simulation Multiconference on the International Simulators Conference CY MAR 29-APR 01, 1993 CL ARLINGTON, VA SP SOC COMP SIMULAT, UTIL SIMULATORS USERS GRP, EPRI, FOSSIL SIMULATORS USERS GRP C1 WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER TECHNOL CTR,SCI COMPUTAT SECT,AIKEN,SC 29802. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC COMPUTER SIMULATION INT PI SAN DIEGO PA PO BOX 17900, SAN DIEGO, CA 92177 SN 0735-9276 BN 1-56555-050-1 J9 SIMUL SERIES PY 1993 VL 25 IS 4 BP 494 EP 499 PG 6 WC Computer Science, Interdisciplinary Applications; Nuclear Science & Technology SC Computer Science; Nuclear Science & Technology GA BA08U UT WOS:A1993BA08U00082 ER PT S AU FAST, JD OSTEEN, BL ADDIS, RP AF FAST, JD OSTEEN, BL ADDIS, RP BE Sharon, A TI MESOSCALE ATMOSPHERIC MODELING OF THE JULY 12, 1992 TRITIUM RELEASE FROM THE SAVANNA RIVER SITE SO SIMULATORS X SE SIMULATION SERIES LA English DT Proceedings Paper CT 1993 Simulation Multiconference on the International Simulators Conference CY MAR 29-APR 01, 1993 CL ARLINGTON, VA SP SOC COMP SIMULAT, UTIL SIMULATORS USERS GRP, EPRI, FOSSIL SIMULATORS USERS GRP C1 WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER TECHNOL CTR,AIKEN,SC 29808. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC COMPUTER SIMULATION INT PI SAN DIEGO PA PO BOX 17900, SAN DIEGO, CA 92177 SN 0735-9276 BN 1-56555-050-1 J9 SIMUL SERIES PY 1993 VL 25 IS 4 BP 517 EP 525 PG 9 WC Computer Science, Interdisciplinary Applications; Nuclear Science & Technology SC Computer Science; Nuclear Science & Technology GA BA08U UT WOS:A1993BA08U00086 ER PT S AU ROSE, HA DUBOIS, DF AF ROSE, HA DUBOIS, DF BE Caflisch, RE Papanicolaou, GC TI DYNAMIC SELF-FOCUSING OF STRUCTURED LASER-BEAMS IN PLASMA SO SINGULARITIES IN FLUIDS, PLASMAS, AND OPTICS SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES LA English DT Proceedings Paper CT NATO Advanced Research Workshop on Singularities in Fluids, Plasmas and Optics CY JUL 06-10, 1992 CL HERAKLION, GREECE SP NATO, SCI COMM C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0258-2023 BN 0-7923-2333-5 J9 NATO ADV SCI INST SE PY 1993 VL 404 BP 281 EP 299 PG 19 WC Mathematics, Applied; Mechanics; Physics, Fluids & Plasmas SC Mathematics; Mechanics; Physics GA BZ51B UT WOS:A1993BZ51B00021 ER PT J AU HOWELL, LH AF HOWELL, LH BE Melson, ND Manteuffel, TA McCormick, SF TI A MULTILEVEL ADAPTIVE PROJECTION METHOD FOR UNSTEADY INCOMPRESSIBLE FLOW SO SIXTH COPPER MOUNTAIN CONFERENCE ON MULTIGRID METHODS SE NASA CONFERENCE PUBLICATION LA English DT Proceedings Paper CT 6th Copper Mountain Conference on Multigrid Methods CY APR 04-09, 1993 CL COPPER MT, CO SP NASA, USAF, OFF SCI RES, BOLLING AIR FORCE BASE, US DOE, NATL SCI FDN C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NASA PI WASHINGTON PA WASHINGTON, DC 20546 J9 NASA CONF P PY 1993 VL 3224 BP 243 EP 257 PN 1-2 PG 15 WC Mathematics, Applied; Physics, Mathematical SC Mathematics; Physics GA BB85A UT WOS:A1993BB85A00017 ER PT B AU ALCOCK, C ALLSMAN, RA AXELROD, TS BENNETT, DP COOK, KH PARK, HS MARSHALL, SL STUBBS, CW GRIEST, K PERLMUTTER, S SUTHERLAND, W FREEMAN, KC PETERSON, BA QUINN, PJ RODGERS, AW AF ALCOCK, C ALLSMAN, RA AXELROD, TS BENNETT, DP COOK, KH PARK, HS MARSHALL, SL STUBBS, CW GRIEST, K PERLMUTTER, S SUTHERLAND, W FREEMAN, KC PETERSON, BA QUINN, PJ RODGERS, AW BE Soifer, BT TI THE MACHO PROJECT - A SEARCH FOR THE DARK-MATTER IN THE MILKY-WAY SO SKY SURVEYS: PROTOSTARS TO PROTOGALAXIES SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Conference on Sky Surveys: Protostars to Protogalaxies, in Honor of Gerry Neugebauer CY SEP 16-18, 1992 CL CALIF INST TECHNOL, PASADENA, CA SP CALIF INST TECHNOL HO CALIF INST TECHNOL C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 17 Z9 17 U1 0 U2 1 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-62-7 J9 ASTR SOC P PY 1993 VL 43 BP 291 EP 296 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BZ94S UT WOS:A1993BZ94S00039 ER PT J AU HOWARTH, RB AF HOWARTH, RB TI ECONOMIC VALUATION OF NATURAL-RESOURCES - ISSUES, THEORY, AND APPLICATIONS - JOHNSON,RL, JOHNSON,GV SO SOCIETY & NATURAL RESOURCES LA English DT Book Review RP HOWARTH, RB (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU TAYLOR & FRANCIS PI BRISTOL PA 1900 FROST ROAD, SUITE 101, BRISTOL, PA 19007-1598 SN 0894-1920 J9 SOC NATUR RESOUR JI Soc. Nat. Resour. PD JAN-MAR PY 1993 VL 6 IS 1 BP 97 EP 98 PG 2 WC Environmental Studies; Planning & Development; Sociology SC Environmental Sciences & Ecology; Public Administration; Sociology GA KQ043 UT WOS:A1993KQ04300012 ER PT J AU GIRVIN, DC GASSMAN, PL BOLTON, H AF GIRVIN, DC GASSMAN, PL BOLTON, H TI ADSORPTION OF AQUEOUS COBALT ETHYLENEDIAMINETETRAACETATE BY DELTA-AL2O3 SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL LA English DT Article ID METAL HYDROUS OXIDES; X-RAY ABSORPTION; CHELATING-AGENTS; WATER INTERFACES; ORGANIC-ACIDS; COMPLEXES; MIGRATION; GOETHITE; EDTA; DISSOLUTION AB Enhanced Co migration in the presence of ethylenediaminetetraacetate (EDTA, referred to below as Y) at U.S. Department of Energy waste sites may be due to the presence of Co(III)-Y rather than Co(II)-Y chelates in groundwaters. To examine the implication of this for the attenuation of Co in soils and subsoils, the absorption of equimolar Co and Y by delta-Al2O3 was examined for ranges of pH (5-9.5), adsorbate concentration (0.2-10 muM), adsorbent concentration (0.1-10 g/L), and ionic strength (0.1-0.001 M NaClO4) in the presence of dissolved Al (0.2-10 muM in equilibrium with delta-Al2O3. The anionic Co(II)-Y and Co(III)-Y chelates exhibited ligand-like adsorption behavior as a function of pH; however, under identical conditions, Co(III)-Y adsorption was much less than that of Co(II)-Y. Dissolved Al competed with Co(II) for Y and, in both Co(II)-Y and Y-only experiments, Al-Y appeared to adsorb, although the affinity of surface hydroxyls (XOH) is greater for Co(II)-Y than for Al-Y. Significant variation in Co(II)-Y and Al-Y adsorption with ionic strength suggests that there is a major electrostatic contribution to adsorption and supports the hypothesis that these chelates form outer-sphere complexes (ion pairs) with XOH. Evidence for competition between XOH and Y for the Co(II) occurs only at the highest adsorbent-to-adsorbate ratio (10 g/L: 0.5 muM = Co(II) = Y), where Co(II)- and Co(II)-Y adsorption occur simultaneously for pH > 8. Outer-sphere surface complexes between XOH and the free carboxylate groups of the chelated Al and Co are proposed to describe absorption. RP GIRVIN, DC (reprint author), PACIFIC NW LAB, CTR EARTH & ENVIRONM SCI, POB 999, RICHLAND, WA 99352 USA. RI Bolton, Harvey/E-5583-2011 NR 46 TC 78 Z9 78 U1 0 U2 6 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 0361-5995 EI 1435-0661 J9 SOIL SCI SOC AM J JI Soil Sci. Soc. Am. J. PD JAN-FEB PY 1993 VL 57 IS 1 BP 47 EP 57 PG 11 WC Soil Science SC Agriculture GA KW022 UT WOS:A1993KW02200009 ER PT J AU FENDORF, SE SPARKS, DL FRANZ, JA CAMAIONI, DM AF FENDORF, SE SPARKS, DL FRANZ, JA CAMAIONI, DM TI ELECTRON-PARAMAGNETIC RESONANCE STOPPED-FLOW KINETIC-STUDY OF MANGANESE(II) SORPTION DESORPTION ON BIRNESSITE SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL LA English DT Article ID SOLID-SOLUTION INTERFACE; AQUEOUS SUSPENSIONS; SPIN-RESONANCE; ADSORPTION; ION; (HYDR)OXIDES; SPECTROSCOPY; CHEMISTRY; OXIDATION; EXCHANGE AB Many important reactions involving colloidal suspensions are rapid. Here, we introduce the application of a technique capable of rapidly measuring a reactant species (within 20 ms after the reaction initiation) in situ: an electron paramagnetic resonance spectroscopically monitored stopped-flow method (EPR-SF). The utility of this technique is demonstrated by investigating the sorption of Mn2+ on delta-MnO2. The sorption reaction was complete in <1 s, with >80% of the Mn2+ being sorbed within 200 ms. A first-order rate dependence on Mn2+ was observed. Measurement of the initial reaction rate allowed the forward (sorption) rate constant to be determined (k(f) = 3.74 x 10(-3) s-1), and the reverse (desorption) rate constant was determined using an integrated reversible first-order rate expression (k(r) = 3.08 x 10(-4) s-1). Using these rate constants, the predicted time dependence of Mn2+ sorption was in good agreement with the measured sorption rate. The results indicate that chemical kinetics are being measured that allow determination of precise reaction rates and mechanisms. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP FENDORF, SE (reprint author), UNIV DELAWARE, DEPT PLANT & SOIL SCI, NEWARK, DE 19717 USA. NR 22 TC 27 Z9 28 U1 1 U2 4 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 SN 0361-5995 J9 SOIL SCI SOC AM J JI Soil Sci. Soc. Am. J. PD JAN-FEB PY 1993 VL 57 IS 1 BP 57 EP 62 PG 6 WC Soil Science SC Agriculture GA KW022 UT WOS:A1993KW02200010 ER PT J AU SHANN, JR BERTSCH, PM AF SHANN, JR BERTSCH, PM TI DIFFERENTIAL CULTIVAR RESPONSE TO POLYNUCLEAR HYDROXO-ALUMINUM COMPLEXES SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL LA English DT Article ID SOLUTION CULTURE; PHYTOTOXICITY; MONONUCLEAR; SPECIATION; TOXICITY; PH; POLYMER; HYDROXYALUMINUM; TOLERANCE; SULFATE AB Recent evidence has indicated that polynuclear hydroxo-Al complexes may be more toxic to certain plant species in solution culture than the hexaaqua or other mononuclear Al complexes. The objective of this study was to investigate the response of six wheat (Triticum aestivum L.) cultivars, having a demonstrated differential tolerance to Al under field conditions, to mononuclear and polynuclear Al when exposed in a solution culture bioassay system. The order of cultivar tolerance to mononuclear Al observed in this investigation was 'Yecora Rojo'> 'Titan'> 'Caldwell'> 'Wampum'> 'Hart,' which is identical to that reported for these cultivars grown in acid soils. This observation demonstrates the utility of the hydroponic bioassay technique as a simple and effective means for screening genetically diverse plants for Al tolerance. Consistent with some previous reports, polynuclear Al was found to be much more toxic to all of the wheat cultivars studied than mononuclear Al, yet, in contrast to the limited data on polynuclear Al toxicity to wheat cultivars differing in Al tolerance, some differential response among cultivars was noted. The order of cultivar tolerance to polynuclear Al generally agreed with that of mononuclear Al, at least at the highest concentration of polynuclear Al, i.e., 7 muM. Based on the nature of the partially neutralized Al stock solutions utilized, we concluded that the toxic polynuclear Al component is the Al13 species. C1 UNIV GEORGIA,DIV BIOGEOCHEM,SAVANNAH RIVER ECOL LAB,DRAWER E,AIKEN,SC 29801. UNIV CINCINNATI,DEPT BIOL,CINCINNATI,OH 45221. NR 41 TC 30 Z9 38 U1 1 U2 4 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 SN 0361-5995 J9 SOIL SCI SOC AM J JI Soil Sci. Soc. Am. J. PD JAN-FEB PY 1993 VL 57 IS 1 BP 116 EP 120 PG 5 WC Soil Science SC Agriculture GA KW022 UT WOS:A1993KW02200021 ER PT S AU POLETTO, G KOPP, RA AF POLETTO, G KOPP, RA BE Gabriel, AH TI A QUASI-STEADY MODEL OF A MICROFLARE-HEATED CORONA SO SOLAR CORONA SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT Symposium E1 of the COSPAR 29th Plenary Meeting CY AUG 28-SEP 05, 1992 CL WASHINGTON, DC SP COMM SPACE RES, INT UNION GEODESY & GEOPHYS, INT ASSOC GEOMAGNETISM & AERON ID NANOFLARES AB It has been recently proposed that the solar corona is heated via the superposition of a large number of tiny energy-release events, the so-called nanoflares. In this paper we develop a simple semi-analytical model to describe the temporal evolution of the nanoflare plasma, confined in rigid magnetic flux tubes and subject to typical nanoflare energy releases. Assuming a power law for the nanoflare energy distribution and hypothesizing the repeated occurrence of nanoflares at random time intervals in an originally cool, low pressure loop, we show how a high temperature, high pressure plasma eventually builds up,leading to a nanoflare-heated corona. Even if the feasibility of the nanoflare mechanism as a coronal heating agent is thus demonstrated, we conclude by pointing out that present instrumentation cannot provide a definitive observational test of this hypothesis. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP POLETTO, G (reprint author), OSSERV ASTROFIS ARCETRI,LARGO E FERMI 5,I-50125 FLORENCE,ITALY. NR 6 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042478-3 J9 ADV SPACE RES PY 1993 VL 14 IS 4 BP 149 EP 152 PG 4 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BA32J UT WOS:A1993BA32J00023 ER PT J AU CHEN, J KEMLY, E CROFT, M JEON, Y XU, X SHAHEEN, SA AF CHEN, J KEMLY, E CROFT, M JEON, Y XU, X SHAHEEN, SA TI XAS-STUDIES OF 1/2/2 TRANSITION-METAL COMPOUNDS SO SOLID STATE COMMUNICATIONS LA English DT Article ID X-RAY-ABSORPTION; ORBITAL OCCUPANCY; FINE-STRUCTURE; L3; CATALYSTS; ELEMENTS; SPECTRA; STATES; AU; PD AB X-ray absorption spectroscopy (XAS) investigations of the electronic structure of 4d transition metal (T) based materials are presented. The sensitivity of the white line (WL) feature at the T-L2, 3 edges to the above E(F), d-component of the electronic states is first emphasized with a study of the 4d row elements Mo to Ag. This WL based method is then extended to a systematic study of RT2X2 compounds with: R = Gd or Ce; T - Ru, Rh, Pd and Ag; and X = Si, Ge, and Sn. A central interpretation proposed for the 1:2:2 compounds is the identification of a near edge XAS feature with T(4d)-X anti-bonding states split above E(F) by hybridization. The strength and splitting of this feature are found to decrease in the sequence X = Si-->Ge-->Sn, consistent with the decreasing bonding interaction. A second interpretation proposed is the decrease of T(4d) states at E(F) in these compounds relative to the elements. C1 BROOKHAVEN NATL LAB,DIV APPL PHYS SCI,UPTON,NY 11973. FLORIDA STATE UNIV,CTR MAT RES,DEPT PHYS,TALLAHASSEE,FL 32306. SETON HALL UNIV,DEPT PHYS,S ORANGE,NJ 07079. RP CHEN, J (reprint author), RUTGERS STATE UNIV,DEPT PHYS & ASTRON,PISCATAWAY,NJ 08855, USA. NR 29 TC 6 Z9 6 U1 1 U2 9 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD JAN PY 1993 VL 85 IS 4 BP 291 EP 296 DI 10.1016/0038-1098(93)90018-I PG 6 WC Physics, Condensed Matter SC Physics GA KK879 UT WOS:A1993KK87900001 ER PT J AU GATRONE, RC DIETZ, ML HORWITZ, EP AF GATRONE, RC DIETZ, ML HORWITZ, EP TI THE EFFECT OF STERIC HINDRANCE OF THE AMIDIC SUBSTITUENTS OF THE CARBAMOYLMETHYLPHOSPHINE OXIDES ON 3RD PHASE FORMATION SO SOLVENT EXTRACTION AND ION EXCHANGE LA English DT Article ID EXTRACTANTS AB Increasing the steric hindrance of the substituents on the amidic nitrogen of the carbamoylmethylphosphine oxide class of extractants leads to a significant decrease in the tendency of these compounds to form a third phase during the extraction of nitric acid. An increase in steric hindrance leads to a reduction in the accessibility of the nitrogen and in the dipole-dipole and dipole-induced-dipole attractions between extractant molecules, thereby reducing the tendency to form a third phase. A corresponding increase in the amount of uranium that could be extracted without third phase formation was not observed due to a reduction in the interaction of the extractant with the diluent because of coordination with the metal ion by both polar groups. RP GATRONE, RC (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 10 TC 10 Z9 10 U1 0 U2 2 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0736-6299 J9 SOLVENT EXTR ION EXC JI Solvent Extr. Ion Exch. PY 1993 VL 11 IS 3 BP 411 EP 422 DI 10.1080/07366299308918163 PG 12 WC Chemistry, Multidisciplinary SC Chemistry GA LB461 UT WOS:A1993LB46100003 ER PT J AU LUMETTA, GJ WESTER, DW MORREY, JR WAGNER, MJ AF LUMETTA, GJ WESTER, DW MORREY, JR WAGNER, MJ TI PRELIMINARY EVALUATION OF CHROMATOGRAPHIC TECHNIQUES FOR THE SEPARATION OF RADIONUCLIDES FROM HIGH-LEVEL RADIOACTIVE-WASTE SO SOLVENT EXTRACTION AND ION EXCHANGE LA English DT Article ID GEL-BOUND MACROCYCLES; SILICA-GEL; METAL-IONS; EXTRACTION; STRONTIUM; REMOVAL; SOLVENT; RESIN AB Three commercially available chromatographic materials were tested in a column mode for use in separating Am, Pu, and Sr-90 from actual neutralized cladding removal waste (NCRW) taken from a Hanford waste tank. For these experiments, the NCRW was dissolved in HNO3/HF solutions. TRU.Spec(TM) was evaluated for the separation of transuranic elements. TRU.Spec(TM) removed Am and Pu from a dissolved NCRW solution, but not as effectively as the TRUEX solvent extraction process. Sr.Spec(TM) and SuperLig(TM) 601 were evaluated for the separation of Sr. Sr.Spec(TM) performed very well in the separation of Sr from dissolved NCRW solution; Sr was not detectable in the column effluent after six bed volumes of solution had been passed through the column. SuperLig(TM) 601 was less effective than Sr.Spec(TM) at separating Sr from dissolved NCRW solution under the conditions used in this experiment. The poor performance of SuperLig(TM) 601 has been attributed to slow kinetics of absorption of Sr. RP LUMETTA, GJ (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 13 TC 21 Z9 21 U1 0 U2 1 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0736-6299 J9 SOLVENT EXTR ION EXC JI Solvent Extr. Ion Exch. PY 1993 VL 11 IS 4 BP 663 EP 682 DI 10.1080/07366299308918180 PG 20 WC Chemistry, Multidisciplinary SC Chemistry GA LM917 UT WOS:A1993LM91700008 ER PT J AU NASH, KL AF NASH, KL TI A REVIEW OF THE BASIC CHEMISTRY AND RECENT DEVELOPMENTS IN TRIVALENT F-ELEMENTS SEPARATIONS SO SOLVENT EXTRACTION AND ION EXCHANGE LA English DT Article ID LIQUID-LIQUID-EXTRACTION; SYNERGISTIC SOLVENT-EXTRACTION; ION-EXCHANGE SEPARATION; N-PHENYL HYDROXYLAMINE; TRANSPLUTONIUM ELEMENTS; LANTHANIDE COMPLEXES; CURIUM COMPLEXATION; AMINO CARBOXYLATES; ACTINIDES; ACID AB Among the most difficult of separations of metal ions are the intra- and intergroup separation of lanthanides and trivalent actinides. Yet environmental concerns related to radioactivity, and new high-tech developments which have increased the demand for pure lanthanides have combined to foster a greater need for effective procedures to attain these separations. The most recent review which concentrated on this problem is now nearly 20 years old. While the methods developed over the preceeding 50-60 years of research are still in use, new understanding and some promising new methods are currently under development. The present manuscript is partly a tutorial of the basic chemical principles leading to successful separations, and partly a review of the results of the past 10-12 years on the separation of tri-valent lanthanides and actinides, both intra-, and intergroup. RP NASH, KL (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 96 TC 323 Z9 331 U1 6 U2 50 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0736-6299 J9 SOLVENT EXTR ION EXC JI Solvent Extr. Ion Exch. PY 1993 VL 11 IS 4 BP 729 EP 768 DI 10.1080/07366299308918184 PG 40 WC Chemistry, Multidisciplinary SC Chemistry GA LM917 UT WOS:A1993LM91700012 ER PT J AU MOYER, BA DELMAU, LH LUMETTA, GJ BAES, CF AF MOYER, BA DELMAU, LH LUMETTA, GJ BAES, CF TI EXTRACTION OF MN(II) FROM NITRIC-ACID BY CROWN ETHER-SYNERGIZED CATION-EXCHANGE - EXTENDED EQUILIBRIUM AND INFRARED-ANALYSIS SO SOLVENT EXTRACTION AND ION EXCHANGE LA English DT Article ID SOLVENT-EXTRACTION; DIDODECYLNAPHTHALENESULFONIC ACID; CARBON-TETRACHLORIDE; SPECTRAL EVIDENCE; SULFONIC-ACID; ION-EXCHANGE; METAL-IONS; AGGREGATION; MIXTURES; COMPLEX AB By use of the modeling program SXLSQA, it has been possible to perform an extensive equilibrium analysis of the extraction of Mn(II) from nitric acid by didodecylnaphthalene sulfonic acid (HDDNS) in combination with either t-butylbenzo-15-crown-5 (tBB15C5) or t-butylcyclohexano-15-crown-5 (tBC15C5) in toluene. Overall, only 1:1 metal:crown ether interactions have been found, and HDDNS acts both as a cation exchanger and as a solvating agent leading to small aggregates. Used alone, HDDNS exists in the form of the fourfold aggregate (HA)4 in equilibrium with the monomer HA (HA represents HDDNS with its acidic proton; associated water is omitted) and extracts Mn(II) to form the species MnH2A4. The crown ethers used alone extract Mn(II) weakly. When combined with HDDNS, tBB15C5 depresses the extraction of the metal compared with HDDNS used alone. In this case, the apparent antagonism is attributed to the interaction of HDDNS with tBB15C5 to give the adducts (HA)B and (HA)2B (B represents the crown ether). No complex of Mn(II) with tBB15C5 and HDDNS was found. However, tBC15C5 synergizes the extraction of Mn(II) by HDDNS with formation of a family of 1:1 metal:crown ether complexes of the form MnBH(a-2)A(a) (a = 2 to 4). Opposing the synergistic effect was the solvation of the crown ether by HDDNS to give a family of species of the form (HA)(a)'B (a' = 1, 2, and 4). In the analysis, activity effects in both aqueous and organic phases have been taken into account. Infrared spectra of the extraction complex MnBA2 (B = tBC15C5) in CCl4 were compared with infrared spectra of the crystalline model complex [Mn(C15C5)(DtBNS)(H2O)](DtBNS).C7H8 (where C15C5 = cyclohexano-15-crown-5 and DtBNS = 3,7-di-t-butylnaphthalene-1-sulfonate), whose structure was known from X-ray diffraction. The spectral results indicate encirclement of the extracted Mn2+ ion by tBC15C5 in solution, and sulfonate anions probably compete weakly with water for the axial coordination sites. C1 ECOLE SUPER PHYS & CHIM IND VILLE PARIS,F-75231 PARIS 05,FRANCE. OAK RIDGE ASSOCIATED UNIV,OAK RIDGE,TN 37830. RP MOYER, BA (reprint author), OAK RIDGE NATL LAB,DIV CHEM,POB 2008,OAK RIDGE,TN 37831, USA. RI Solominow, Sonia/A-4021-2008; Moyer, Bruce/L-2744-2016 OI Moyer, Bruce/0000-0001-7484-6277 NR 42 TC 8 Z9 8 U1 1 U2 2 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0736-6299 J9 SOLVENT EXTR ION EXC JI Solvent Extr. Ion Exch. PY 1993 VL 11 IS 5 BP 889 EP 921 DI 10.1080/07366299308918193 PG 33 WC Chemistry, Multidisciplinary SC Chemistry GA MA409 UT WOS:A1993MA40900009 ER PT J AU HORWITZ, EP CHIARIZIA, R DIAMOND, H GATRONE, RC ALEXANDRATOS, SD TROCHIMCZUK, AQ CRICK, DW AF HORWITZ, EP CHIARIZIA, R DIAMOND, H GATRONE, RC ALEXANDRATOS, SD TROCHIMCZUK, AQ CRICK, DW TI UPTAKE OF METAL-IONS BY A NEW CHELATING ION-EXCHANGE RESIN .1. ACID DEPENDENCIES OF ACTINIDE IONS SO SOLVENT EXTRACTION AND ION EXCHANGE LA English DT Article ID MECHANISM BIFUNCTIONAL POLYMERS; METHANE DIPHOSPHONIC ACIDS; SEPARATIONS; RECOGNITION; COMPLEXES AB The uptake of several actinide ions [U(VI), Pu(IV), Np(IV), Th(IV] and Am(III)) from nitric and hydrochloric acid solutions, and of U(VI) from near-neutral solutions by the new chelating ion-exchange resin, Diphonix(TM), has been investigated. Diphonix is a polyfunctional resin containing sulfonic and gem-disphosphonic acid groups chemically bonded in a styrene-divinylbenzene polymeric network. Comparison of the acid dependencies of the actinide ions uptake measured with Diphonix with those obtained using a commercial sulfonic-type resin and a resin containing both sulfonic and monophosphonic acid groups, has shown that Diphonix binds the actinides via a different kind of chemical interaction, involving the,formation of chelate complexes through the phosphoryl groups of the gem-diphosphonic acids. As a consequence, Diphonix is superior to other resins in extracting actinide ions from very acidic solutions. A better performance of Diphonix is also observed with the uptake of uranium from neutral solutions. Conditions for efficient stripping of actinide species from the resin have been found. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. RP HORWITZ, EP (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. NR 22 TC 108 Z9 109 U1 2 U2 9 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0736-6299 J9 SOLVENT EXTR ION EXC JI Solvent Extr. Ion Exch. PY 1993 VL 11 IS 5 BP 943 EP 966 DI 10.1080/07366299308918195 PG 24 WC Chemistry, Multidisciplinary SC Chemistry GA MA409 UT WOS:A1993MA40900011 ER PT J AU CHIARIZIA, R HORWITZ, EP GATRONE, RC ALEXANDRATOS, SD TROCHIMCZUK, AQ CRICK, DW AF CHIARIZIA, R HORWITZ, EP GATRONE, RC ALEXANDRATOS, SD TROCHIMCZUK, AQ CRICK, DW TI UPTAKE OF METAL-IONS BY A NEW CHELATING ION-EXCHANGE RESIN .2. ACID DEPENDENCIES OF TRANSITION AND POSTTRANSITION METAL-IONS SO SOLVENT EXTRACTION AND ION EXCHANGE LA English DT Article AB Diphonix(TM) is a new dual-mechanism polyfunctional resin containing sulfonic and gem-diphosphonic acid groups. In Part 1 of this series the effectiveness of Diphonix in removing actinide ions from very acidic solutions was demonstrated. In this paper we report on the uptake of various transition and post-transition metal ions with Diphonix and two other resins for comparison. The results show that Diphonix has a very high affinity for Fe(III) and Cr(III) in very acidic solutions. From neutral solutions Diphonix exhibits a high selectivity for lead and transition metals over calcium Conditions for efficient stripping of the investigated ions have been found. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. NR 8 TC 52 Z9 52 U1 1 U2 7 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0736-6299 J9 SOLVENT EXTR ION EXC JI Solvent Extr. Ion Exch. PY 1993 VL 11 IS 5 BP 967 EP 985 DI 10.1080/07366299308918196 PG 19 WC Chemistry, Multidisciplinary SC Chemistry GA MA409 UT WOS:A1993MA40900012 ER PT B AU PARKE, SJ AF PARKE, SJ BE Qiu, SQ TI LONG-BASELINE SEARCHES FOR NEUTRINO OSCILLATIONS SO SOME NEW TRENDS ON FLUID MECHANICS AND THEORETICAL PHYSICS LA English DT Proceedings Paper CT International Conference on Fluid Mechanics and Theoretical Physics, in Honor of Professor Pei-Yuan Chous 90th Anniversary CY JUN 01-03, 1992 CL BEIJING, PEOPLES R CHINA SP Peking Univ, Chinese Soc Theoret & Appl Mech, Chinese Phys Soc C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PEKING UNIV PRESS PI BEIJING PA HAIDIANQU, BEIJING, PEOPLES R CHINA BN 7-301-02070-8 PY 1993 BP 516 EP 523 PG 8 WC Mechanics; Physics, Mathematical SC Mechanics; Physics GA BD18F UT WOS:A1993BD18F00096 ER PT B AU AINSWORTH, CC FREDERICKSON, JK SMITH, SC AF AINSWORTH, CC FREDERICKSON, JK SMITH, SC BE Linn, DM Carski, FH Brusseau, ML Chang, TH TI EFFECT OF SORPTION ON THE DEGRADATION OF AROMATIC-ACIDS AND BASES SO SORPTION AND DEGRADATION OF PESTICIDES AND ORGANIC CHEMICALS IN SOIL LA English DT Proceedings Paper CT Symposium on Sorption and Degradation of Agricultural Chemicals in Soils, at the 1991 Annual Meeting of the Soil-Science-Soc-of-America and the American-Soc-of-Agronomy CY OCT 30, 1991 CL DENVER, CO SP SOIL SCI SOC AMER, AMER SOC AGRON C1 BATTELLE MEM INST,PACIFIC NW LABS,CTR EARTH & ENVIRONM SCI,RICHLAND,WA 99352. NR 0 TC 3 Z9 3 U1 0 U2 0 PU SOIL SCIENCE SOC AMER PI MADISON PA 677 S SEGOE RD, MADISON, WI 53711 BN 0-89118-803-7 PY 1993 BP 125 EP 144 PG 20 WC Environmental Sciences; Soil Science SC Environmental Sciences & Ecology; Agriculture GA BZ52T UT WOS:A1993BZ52T00008 ER PT S AU BENNETT, CL BOGGESS, NW CHENG, ES HAUSER, MG KELSALL, T MATHER, JC MOSELEY, SH MURDOCK, TL SHAFER, RA SILVERBERG, RF SMOOT, GF WEISS, R WRIGHT, EL AF BENNETT, CL BOGGESS, NW CHENG, ES HAUSER, MG KELSALL, T MATHER, JC MOSELEY, SH MURDOCK, TL SHAFER, RA SILVERBERG, RF SMOOT, GF WEISS, R WRIGHT, EL BE Trumper, J Cesarsky, C Palumbo, GGC Bignami, GF TI SCIENTIFIC RESULTS FROM COBE SO SPACE ASTRONOMY SE ADVANCES IN SPACE RESEARCH LA English DT Article; Proceedings Paper CT Symposium E2, and the Topical Meeting of the COSPAR Interdisciplinary Scientific Commission E of the COSPAR 29th Plenary Meeting CY AUG 28-SEP 05, 1992 CL WASHINGTON, DC SP COMM SPACE RES, INT ASTRON UNION, INT ACAD ASTRONAUT ID COSMIC-BACKGROUND-RADIATION; DIFFERENTIAL MICROWAVE RADIOMETERS; INFLATIONARY UNIVERSE SCENARIO; COLD DARK MATTER; SCALE ANISOTROPIES; EXPLORER COBE; SPECTRUM; LIGHT; PERTURBATIONS; FLUCTUATIONS AB NASA's Cosmic Background Explorer (COBE(1)) carries three scientific instruments to make precise measurements of the spectrum and anisotropy of the cosmic microwave background (CMB) radiation on angular scales greater than 7 degrees and to conduct a search for a diffuse cosmic infrared background (CIB) radiation with 0.7 degrees angular resolution. Data from the Far-InfraRed Absolute Spectrophotometer (FIRAS) show that the spectrum of the CMB is that of a blackbody of temperature T=2.73+/-0.08 It, with no deviation from a blackbody spectrum greater than 0.25% of the peak brightness. The first year of data from the Differential Microwave Radiometers (DMR) show statistically significant CMB anisotropy. The anisotropy is consistent with a scale invariant primordial density fluctuation spectrum. Infrared sky brightness measurements from the Diffuse InfraRed Background Experiment (DIRBE) provide new conservative upper limits to the CIB. Extensive modeling of solar system anti galactic infrared foregrounds is required for further improvement in the CIB limits. C1 GEN RES CORP,DANVERS,MA 01923. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. MIT,DEPT PHYS,CAMBRIDGE,MA 02139. UNIV CALIF LOS ANGELES,DEPT ASTRON,LOS ANGELES,CA 90024. RP BENNETT, CL (reprint author), NASA,GODDARD SPACE FLIGHT CTR,CODE 685,GREENBELT,MD 20771, USA. RI Moseley, Harvey/D-5069-2012 NR 102 TC 2 Z9 2 U1 0 U2 2 PU PERGAMON PRESS LTD PI OXFORD PA THE BOULEVARD LANGFORD LANE KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 BN 0-08-042353-1 J9 ADV SPACE RES PY 1993 VL 13 IS 12 BP 409 EP 423 DI 10.1016/0273-1177(93)90150-A PG 15 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BZ58Q UT WOS:A1993BZ58Q00059 ER PT S AU SUSZCYNSKY, DM BOROVSKY, JE GOERTZ, CK AF SUSZCYNSKY, DM BOROVSKY, JE GOERTZ, CK BE Bernhardt, PA Mohlmann, D Ip, WH TI SECONDARY-ELECTRON YIELDS OF SOLAR-SYSTEM ICES SO SPACE PLASMA PHYSICS SE ADVANCES IN SPACE RESEARCH LA English DT Proceedings Paper CT TOPICAL MEETING OF COSPAR-INTERDISCIPLINARY-SCIENTIFIC-COMMISSION : SPACE PLASMA PHYSICS, AT THE COSPAR 29TH PLENARY MEETING CY AUG 28-SEP 05, 1992 CL WASHINGTON, DC SP COMM SPAC RES, INT UNION RADIO SCI, INT UNION GEODESY & GEOPHYS, INT ASSOC GEOMAGNETISM & AERON RP SUSZCYNSKY, DM (reprint author), LOS ALAMOS NATL LAB,SPACE PLASMA PHYS GRP,LOS ALAMOS,NM 87545, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON PRESS LTD PI OXFORD PA OXFORD SN 0273-1177 BN 0-08-042342-6 J9 ADV SPACE RES PY 1993 VL 13 BP 183 EP 187 PG 5 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Physics, Fluids & Plasmas SC Astronomy & Astrophysics; Geology; Physics GA BZ36Z UT WOS:A1993BZ36Z00024 ER PT S AU BIONTA, RM OTT, LL AF BIONTA, RM OTT, LL BE Teles, J Samii, MV TI AUTONOMOUS TRACKING AND EXPOSURE CONTROL DURING AN ASTEROID FLYBY SO SPACEFLIGHT DYNAMICS 1993, PTS 1 AND 2 SE ADVANCES IN THE ASTRONAUTICAL SCIENCES LA English DT Proceedings Paper CT AAS/NASA International Symposium: Spaceflight Dynamics 1993 CY APR 26-30, 1993 CL GREENBELT, MD SP AMER ASTRONAUT SOC, NASA C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIVELT INC PI SAN DIEGO PA PO BOX 28130, SAN DIEGO, CA 92128 SN 0065-3438 BN 0-87703-378-1 J9 ADV ASTRONAUT SCI PY 1993 VL 84 BP 197 EP 202 PN 1-2 PG 6 WC Engineering, Aerospace SC Engineering GA BA20M UT WOS:A1993BA20M00014 ER PT J AU STYRIS, DL REDFIELD, DA AF STYRIS, DL REDFIELD, DA TI PERSPECTIVES ON MECHANISMS OF ELECTROTHERMAL ATOMIZATION SO SPECTROCHIMICA ACTA REVIEWS LA English DT Review ID ATOMIC-ABSORPTION SPECTROMETRY; GRAPHITE-FURNACE ATOMIZATION; SCANNING ELECTRON-MICROSCOPY; GAS-PHASE REACTIONS; MASS-SPECTROMETRY; SELENIUM VAPORIZATION; CARBOTHERMAL REDUCTION; ABSORBANCE PROFILES; LEAD VAPORIZATION; ALUMINUM-OXIDE C1 NW NAZARENE COLL, DEPT CHEM, NAMPA, ID 83686 USA. RP STYRIS, DL (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 150 TC 64 Z9 64 U1 1 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0958-319X J9 SPECTROCHIM ACTA REV PY 1993 VL 15 IS 2 BP 71 EP 123 PG 53 WC Chemistry, Analytical; Spectroscopy SC Chemistry; Spectroscopy GA KC965 UT WOS:A1993KC96500001 ER PT J AU STUMP, NA BURNS, JB DAI, S MAMANTOV, G YOUNG, JP PETERSON, JR AF STUMP, NA BURNS, JB DAI, S MAMANTOV, G YOUNG, JP PETERSON, JR TI EUROPIUM OXYCHLORIDE ABSORPTION-SPECTROSCOPY AS AN OPTICAL PROBE OF TEMPERATURE SO SPECTROSCOPY LETTERS LA English DT Article DE EUOCL; TEMPERATURE PROBE; ABSORPTION SPECTROSCOPY AB The temperature dependence of the features which arise from the F-7(0.1) double line arrow pointing right 5D3 absorption transitions in EuOCl as seen by diffuse-reflectance spectroscopy has been investigated. The transitions shift linearly to higher energy with increasing temperature. The ratio of the intensities of the transitions arising from the F-7(0) state to those arising from the F-7(1) state also appears to be a linear function of temperature. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV ANALYT CHEM,OPT SPECT GRP,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV CHEM,TRANSURANIUM RES LAB,OAK RIDGE,TN 37831. RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 10 TC 2 Z9 2 U1 3 U2 5 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0038-7010 J9 SPECTROSC LETT JI Spectr. Lett. PY 1993 VL 26 IS 6 BP 1073 EP 1083 DI 10.1080/00387019308011595 PG 11 WC Spectroscopy SC Spectroscopy GA LJ213 UT WOS:A1993LJ21300013 ER PT J AU SMITH, V VERHEY, L JONES, E LYMAN, J AF SMITH, V VERHEY, L JONES, E LYMAN, J TI CONSEQUENCES TO THE PATIENT IN THE EVENT OF HYDRAULIC UNIT FAILURE SO STEREOTACTIC AND FUNCTIONAL NEUROSURGERY LA English DT Proceedings Paper CT 1992 Meeting of the Leksell-Gamma-Knife-Society CY MAR 07-09, 1992 CL BUENOS AIRES, ARGENTINA SP LEKSELL GAMMA KNIFE SOC DE RADIOSURGERY; GAMMA KNIFE; STEREOTAXIC IRRADIATION; RADIATION SAFETY; GAMMA RAY COLLIMATION C1 UNIV CALIF SAN FRANCISCO,SAN FRANCISCO,CA 94143. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KARGER PI BASEL PA ALLSCHWILERSTRASSE 10, CH-4009 BASEL, SWITZERLAND SN 1011-6125 J9 STEREOT FUNCT NEUROS JI Stereotact. Funct. Neurosurg. PY 1993 VL 61 SU 1 BP 173 EP 177 DI 10.1159/000100671 PG 5 WC Neurosciences; Neuroimaging; Surgery SC Neurosciences & Neurology; Surgery GA MQ069 UT WOS:A1993MQ06900020 PM 8115749 ER PT S AU HABIB, S AF HABIB, S BE Buchler, JR Kandrup, HE TI MULTIPLICATIVE NOISE - APPLICATIONS IN COSMOLOGY AND FIELD-THEORY SO STOCHASTIC PROCESSES IN ASTROPHYSICS SE ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Article; Proceedings Paper CT 8th Annual Florida Workshop in Nonlinear Astronomy: Stochastic Processes in Astrophysics CY FEB 04-06, 1993 CL UNIV FLORIDA GAINESVILLE, GAINESVILLE, FL SP UNIV FLORIDA, DEPT ASTRON, UNIV FLORIDA, DEPT PHYS HO UNIV FLORIDA GAINESVILLE ID INFLATIONARY UNIVERSE; LANGEVIN EQUATION; QUANTUM; DECOHERENCE; TRANSITION RP HABIB, S (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 28 TC 3 Z9 3 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA 2 EAST 63RD ST, NEW YORK, NY 10021 SN 0077-8923 BN 0-89766-802-2 J9 ANN NY ACAD SCI JI Ann.NY Acad.Sci. PY 1993 VL 706 BP 111 EP 125 DI 10.1111/j.1749-6632.1993.tb24685.x PG 15 WC Astronomy & Astrophysics; Mathematics, Applied; Multidisciplinary Sciences; Physics, Mathematical SC Astronomy & Astrophysics; Mathematics; Science & Technology - Other Topics; Physics GA BA33Z UT WOS:A1993BA33Z00010 ER PT B AU YOO, MH FU, CL AF YOO, MH FU, CL BE Darolia, R Lewandowski, JJ Liu, CT Martin, PL Miracle, DB Nathal, MV TI FUNDAMENTALS OF MECHANICAL-BEHAVIOR IN STRUCTURAL INTERMETALLICS - A SYNTHESIS OF ATOMISTIC AND CONTINUUM MODELING SO STRUCTURAL INTERMETALLICS LA English DT Proceedings Paper CT 1st International Symposium on Structural Intermetallics CY SEP 26-30, 1993 CL CHAMPION, PA SP MINERALS MET & MAT SOC, HIGH TEMP ALLOYS COMM, AMER SOC MET INT, AMER SOC MECH ENGINEERS C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. NR 0 TC 8 Z9 8 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-253-1 PY 1993 BP 283 EP 292 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA BZ64C UT WOS:A1993BZ64C00030 ER PT B AU LIU, CT AF LIU, CT BE Darolia, R Lewandowski, JJ Liu, CT Martin, PL Miracle, DB Nathal, MV TI NI3AL ALUMINIDE ALLOYS SO STRUCTURAL INTERMETALLICS LA English DT Proceedings Paper CT 1st International Symposium on Structural Intermetallics CY SEP 26-30, 1993 CL CHAMPION, PA SP MINERALS MET & MAT SOC, HIGH TEMP ALLOYS COMM, AMER SOC MET INT, AMER SOC MECH ENGINEERS C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. NR 0 TC 23 Z9 23 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-253-1 PY 1993 BP 365 EP 377 PG 13 WC Materials Science, Multidisciplinary SC Materials Science GA BZ64C UT WOS:A1993BZ64C00039 ER PT B AU GEORGE, EP LIU, CT POPE, DP AF GEORGE, EP LIU, CT POPE, DP BE Darolia, R Lewandowski, JJ Liu, CT Martin, PL Miracle, DB Nathal, MV TI A REEXAMINATION OF GRAIN-BOUNDARY FRACTURE IN NI3AL - ENVIRONMENTAL AND ALLOYING EFFECTS SO STRUCTURAL INTERMETALLICS LA English DT Proceedings Paper CT 1st International Symposium on Structural Intermetallics CY SEP 26-30, 1993 CL CHAMPION, PA SP MINERALS MET & MAT SOC, HIGH TEMP ALLOYS COMM, AMER SOC MET INT, AMER SOC MECH ENGINEERS C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RI George, Easo/L-5434-2014 NR 0 TC 14 Z9 15 U1 0 U2 1 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-253-1 PY 1993 BP 431 EP 436 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA BZ64C UT WOS:A1993BZ64C00046 ER PT B AU SIKKA, VK VISWANATHAN, S MCKAMEY, CG AF SIKKA, VK VISWANATHAN, S MCKAMEY, CG BE Darolia, R Lewandowski, JJ Liu, CT Martin, PL Miracle, DB Nathal, MV TI DEVELOPMENT AND COMMERCIALIZATION STATUS OF FE3AL-BASED INTERMETALLIC ALLOYS SO STRUCTURAL INTERMETALLICS LA English DT Proceedings Paper CT 1st International Symposium on Structural Intermetallics CY SEP 26-30, 1993 CL CHAMPION, PA SP MINERALS MET & MAT SOC, HIGH TEMP ALLOYS COMM, AMER SOC MET INT, AMER SOC MECH ENGINEERS C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 40 Z9 40 U1 0 U2 2 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-253-1 PY 1993 BP 483 EP 491 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA BZ64C UT WOS:A1993BZ64C00052 ER PT B AU COTTON, JD NOEBE, RD KAUFMAN, MJ AF COTTON, JD NOEBE, RD KAUFMAN, MJ BE Darolia, R Lewandowski, JJ Liu, CT Martin, PL Miracle, DB Nathal, MV TI TERNARY ALLOYING EFFECTS IN POLYCRYSTALLINE BETA-NIAL SO STRUCTURAL INTERMETALLICS LA English DT Proceedings Paper CT 1st International Symposium on Structural Intermetallics CY SEP 26-30, 1993 CL CHAMPION, PA SP MINERALS MET & MAT SOC, HIGH TEMP ALLOYS COMM, AMER SOC MET INT, AMER SOC MECH ENGINEERS C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RI Kaufman, Michael/A-7737-2012 NR 0 TC 29 Z9 29 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-253-1 PY 1993 BP 513 EP 522 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA BZ64C UT WOS:A1993BZ64C00055 ER PT B AU HENAGER, CH BRIMHALL, JL HIRTH, JP AF HENAGER, CH BRIMHALL, JL HIRTH, JP BE Darolia, R Lewandowski, JJ Liu, CT Martin, PL Miracle, DB Nathal, MV TI STRUCTURE AND PROPERTIES OF INTERMETALLIC COMPOSITES SYNTHESIZED IN-SITU USING SOLID-STATE DISPLACEMENT-REACTIONS SO STRUCTURAL INTERMETALLICS LA English DT Proceedings Paper CT 1st International Symposium on Structural Intermetallics CY SEP 26-30, 1993 CL CHAMPION, PA SP MINERALS MET & MAT SOC, HIGH TEMP ALLOYS COMM, AMER SOC MET INT, AMER SOC MECH ENGINEERS C1 BATTELLE MEM INST,PACIFIC NW LABS,RICHLAND,WA 99352. NR 0 TC 7 Z9 7 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-253-1 PY 1993 BP 799 EP 808 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA BZ64C UT WOS:A1993BZ64C00087 ER PT B AU LEONARD, PJT RICHER, HB FAHLMAN, GG AF LEONARD, PJT RICHER, HB FAHLMAN, GG BE Djorgovski, SG Meylan, G TI DYNAMICAL MASS ESTIMATES IN M13 SO STRUCTURE AND DYNAMICS OF GLOBULAR CLUSTERS SE ASTRONOMICAL SOCIETY OF THE PACIFIC CONFERENCE SERIES LA English DT Proceedings Paper CT Workshop on Dynamics of Globular Clusters CY JUL 15-17, 1992 CL UNIV CALIF BERKELEY, BERKELEY, CA HO UNIV CALIF BERKELEY C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 BN 0-937707-69-4 J9 ASTR SOC P PY 1993 VL 50 BP 85 EP 86 PG 2 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BA17E UT WOS:A1993BA17E00011 ER PT S AU OGILBY, PR DILLON, MP GAO, YP IU, KK KRISTIANSEN, M TAYLOR, VL CLOUGH, RL AF OGILBY, PR DILLON, MP GAO, YP IU, KK KRISTIANSEN, M TAYLOR, VL CLOUGH, RL BE Urban, MW Craver, CD TI POLYMER CHARACTERIZATION USING SINGLET OXYGEN PHOSPHORESCENCE AS A SPECTROSCOPIC PROBE SO STRUCTURE-PROPERTY RELATIONS IN POLYMERS: SPECTROSCOPY AND PERFORMANCE SE ADVANCES IN CHEMISTRY SERIES LA English DT Proceedings Paper CT 1991 American-Chemical-Society Meeting CY APR 18, 1991 CL ATLANTA, GA SP AMER CHEM SOC C1 SANDIA NATL LABS, DIV ORGAN MAT ORG 1811, ALBUQUERQUE, NM 87185 USA. RP OGILBY, PR (reprint author), UNIV NEW MEXICO, DEPT CHEM, ALBUQUERQUE, NM 87131 USA. NR 0 TC 0 Z9 0 U1 2 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0065-2393 BN 0-8412-2525-7 J9 ADV CHEM SER PY 1993 VL 236 BP 573 EP 598 PG 26 WC Polymer Science; Spectroscopy SC Polymer Science; Spectroscopy GA BZ21N UT WOS:A1993BZ21N00022 ER PT J AU KRISHNA, KR BELL, AT ZANDERIGHI, L WANG, D JOYNER, RW BIANCHI, D KLIER, K IHM, SK GOODWIN, J SCHULZ, H RAGAINI, V MACHOCKI, A AF KRISHNA, KR BELL, AT ZANDERIGHI, L WANG, D JOYNER, RW BIANCHI, D KLIER, K IHM, SK GOODWIN, J SCHULZ, H RAGAINI, V MACHOCKI, A TI ISOTOPIC TRACER STUDIES OF CHAIN PROPAGATION AND TERMINATION DURING FISCHER-TROPSCH SYNTHESIS OVER RU TIO2 SO STUDIES IN SURFACE SCIENCE AND CATALYSIS LA English DT Article ID CO HYDROGENATION; CATALYTIC SYNTHESIS; TRANSIENT; SUPPORT; GROWTH; HYDROCARBONS; SELECTIVITY; MECHANISM; RU/TIO2; METALS AB Transient response isotopic tracer experiments have been used to study chain growth during Fischer-Tropsch synthesis over a Ru/TiO2 catalyst. This involves observation of the incorporation of C-13 into reaction products after an abrupt switch from (CO)-C-12/D2 to (CO)-C-13/D2 in the feed. Values for the rate constants for initiation, propagation and termination are determined by fitting theoretically generated curves to the observed transient response. The rate coefficient for chain initiation is found to be independent of temperature, whereas the rate coefficients for propagation and termination increase with temperature. The activation energy for chain termination is significantly higher than that for chain propagation, explaining the observed decrease in chain growth probability, alpha, with increasing temperature. Coverages by reaction intermediates are also estimated. The dominant species are monomeric building units which occupy 0.2-0.6 ML. Alkyl species that are the direct hydrocarbon product precursors occupy < 0.2 ML and adsorbed CO covers 0.7 ML. Total coverage by CO and the reaction intermediates equals CO uptake of a fresh catalyst. C1 UNIV CALIF BERKELEY, DEPT CHEM ENGN, BERKELEY, CA 94720 USA. RP KRISHNA, KR (reprint author), LAWRENCE BERKELEY LAB, CTR ADV MAT, BERKELEY, CA 94720 USA. RI Machocki, Andrzej/B-6432-2013 OI Machocki, Andrzej/0000-0001-8171-2963 NR 23 TC 0 Z9 0 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2991 J9 STUD SURF SCI CATAL JI Stud. Surf. Sci. Catal. PY 1993 VL 75 BP 181 EP 193 PN A PG 13 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA MH875 UT WOS:A1993MH87500007 ER PT J AU CAMPBELL, RA RODRIGUEZ, JA GOODMAN, DW PONEC, V KING, DA NIEMANTSVERDRIET, H VANSANTEN, R GRUNERT, W CHADWICK, D BERTOLINI, JC WANG, D AF CAMPBELL, RA RODRIGUEZ, JA GOODMAN, DW PONEC, V KING, DA NIEMANTSVERDRIET, H VANSANTEN, R GRUNERT, W CHADWICK, D BERTOLINI, JC WANG, D TI NATURE OF METAL-METAL BONDING IN MIXED-METAL CATALYSTS SO STUDIES IN SURFACE SCIENCE AND CATALYSIS LA English DT Article ID TRANSITION-METAL; ELECTRONIC-STRUCTURE; BIMETALLIC SURFACES; ULTRATHIN FILMS; CO; PD; MODEL; XPS; CHEMISORPTION; ADSORPTION AB The nature of the electronic and physical properties Of ultrathin Cu and Pd films on Ta(110) have been studied using X-ray photoelectron spectroscopy (XPS) and temperature programmed desorption (TPD). The results indicate that monolayers of Cu and Pd on Ta(110) have lower electron densities than that measured for the surface atoms of Cu(100) and Pd(100), respectively. By comparison of the present results with those for other Cu, Ni and Pd films, correlations are found among the electronic perturbations of the monolayer films, the metal-substrate cohesive bond strength and the chemisorption properties of the monolayer films toward CO. A simple model is described to explain the direction and magnitude of the electronic perturbations. Surface electronegativity is defined and is found to be quite different from electronegativities in bulk alloys. The electronic state of the metal overlayer is determined to be an excellent indicator of the ability to chemisorb CO. C1 BROOKHAVEN NATL LAB, DEPT CHEM, UPTON, NY 11973 USA. RP CAMPBELL, RA (reprint author), TEXAS A&M UNIV SYST, DEPT CHEM, COLL STN, TX 77843 USA. RI van Santen, Rutger/B-4771-2013 NR 37 TC 2 Z9 2 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2991 J9 STUD SURF SCI CATAL JI Stud. Surf. Sci. Catal. PY 1993 VL 75 BP 333 EP 344 PN A PG 12 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA MH875 UT WOS:A1993MH87500019 ER PT J AU LOGAN, AD PAFFETT, MT AF LOGAN, AD PAFFETT, MT TI CATALYSIS AT EXPERIMENTALLY DESIGNED SURFACES - N-BUTANE HYDROGENOLYSIS AT SN/GROUP VIII SURFACE ALLOYS SO STUDIES IN SURFACE SCIENCE AND CATALYSIS LA English DT Article ID PT(111) AB Bimetallic square-root 3x square-root 3R30-degrees-Sn/M(111) [M=Ni, Pt] surface alloys have been prepared in an ultrahigh vacuum system and used in model moderate pressure (1-200 Torr) catalytic reactions. Hydrogenolysis of n-butane (H-2/n-C4 = 20) has been used to characterize the effects of ordered bimetallic ensembles relative to those available at the respective (111) surfaces. The effect of alloying Sn into the Ni(111) surface produced an overall lowering of the catalytic reactivity nearly equal to the number of Ni surface sites lost upon producing the square-root 3x square-root 3R30-degrees surface alloy. In addition, the overall rate of hydrogenolysis of n-butane at the square-root 3x square-root 3R30-degrees-Sn/Pt(111) surface alloy was also found to have decreased (although not in proportion to the loss of total Pt atoms). Catalytic deactivation due to carbon buildup was observed to decrease significantly at both of the ordered square-root 3x square-root 3R30-degrees-Sn/M(111) surface alloys under reaction conditions. RP LOGAN, AD (reprint author), LANL, DIV CHEM & LASER SCI, LOS ALAMOS, NM 87545 USA. NR 14 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2991 J9 STUD SURF SCI CATAL JI Stud. Surf. Sci. Catal. PY 1993 VL 75 BP 1595 EP 1598 PN B PG 4 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA MK932 UT WOS:A1993MK93200066 ER PT J AU CONNER, WC FERRERO, M WEBB, S SOMMER, R CHIOVETTA, M JONES, K SPANNE, P AF CONNER, WC FERRERO, M WEBB, S SOMMER, R CHIOVETTA, M JONES, K SPANNE, P TI NEW INSIGHT INTO THE CHANGING CATALYST POLYMER MORPHOLOGY DURING OLEFIN POLYMERIZATION - THE APPLICATION OF TOMOGRAPHY SO STUDIES IN SURFACE SCIENCE AND CATALYSIS LA English DT Article ID MOLECULAR-WEIGHT DISTRIBUTION; PARTICLES AB Heterogeneous olefin polymerization increasingly dominates the production of polyethylene, polypropylene and mixed polyolefins. Our studies of the morphology of these catalysts reveal that several different mechanisms occur for the changes in the accessible active surface, the void volume and the distribution of catalytically active particles within the growing polymer. These differences in morphological dynamics are dictated by the initial catalyst pore structure and the related subsequent catalyst fragmentation processes. MgCl2 supported catalyst tend to be uniform in their microporosity (i.e., approximately 4 nm); although, there is evidence for multi-modal mu-pore dimension due to the agglomeration of small subparticles. The initial fragmentation proceeds readily and uniformly to yield a multi-grain growth of sub-particle agglomerates. The surface of these sub-particle agglomerates is accessible through the void-space between growing catalyst/particle grains. Silica supported catalysts exhibit a network of porosity from meso- to micro-pores. These catalysts fragment progressively from the larger to the smaller meso-pores following the filling of the available pore space with growing polymer. Since this fragmentation is progressive and is dictated by pore filling, the surface area and pore volume can decrease rapidly. In the extreme, these mechanisms result in both loss and retention of available surface area and pore volume. As the polymer grows these differences can result in uniform as well as non-uniform distributions of catalyst fragments within the growing polymer. However, the differences between the morphological mechanisms can depend on the conditions (pressure, temperature and gas phase v.s. slurry) of the polymerization process and, thus, no simple conclusions may be drawn that relate one catalyst system to a specific mechanism for the changes in morphology. C1 UNIV NAC LITORAL, CONICET, INTEC, SANTA FE, ARGENTINA. BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. RP CONNER, WC (reprint author), UNIV MASSACHUSETTS, DEPT CHEM ENGN, AMHERST, MA 01002 USA. NR 9 TC 0 Z9 0 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2991 J9 STUD SURF SCI CATAL JI Stud. Surf. Sci. Catal. PY 1993 VL 75 BP 1826 EP 1830 PN B PG 5 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA MK932 UT WOS:A1993MK93200122 ER PT J AU LEE, KS REIMER, JA BELL, AT AF LEE, KS REIMER, JA BELL, AT TI INVESTIGATIONS OF HYDRODENITROGENATION OF QUINOLINE OVER MOLYBDENUM NITRIDE SO STUDIES IN SURFACE SCIENCE AND CATALYSIS LA English DT Article ID CATALYTIC HYDRODENITROGENATION AB An investigation has been carried out of the reaction pathway for the hydrodenitrogenation of quinoline over Mo2N. Quinoline is found to undergo a rapid hydrogenation to form 1,2,3,4,-tetrahydroquinoline. This product then reacts more slowly to form 2-propylanaline, which in turn undergoes hydrogenolysis of the C-N bond in the saturated ring to form propylbenzene. No evidence is found for propylcyclohexane. C1 UNIV CALIF BERKELEY, DEPT CHEM ENGN, BERKELEY, CA 94720 USA. RP LEE, KS (reprint author), LAWRENCE BERKELEY LAB, CTR ADV MAT, DIV MAT SCI, BERKELEY, CA 94720 USA. OI Bell, Alexis/0000-0002-5738-4645 NR 4 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2991 J9 STUD SURF SCI CATAL JI Stud. Surf. Sci. Catal. PY 1993 VL 75 BP 2197 EP 2200 PN C PG 4 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA MK934 UT WOS:A1993MK93400075 ER PT J AU SORIA, J CONESA, JC LOPEZGRANADOS, M FIERRO, JLG DELABANDA, JFG HEINEMANN, H AF SORIA, J CONESA, JC LOPEZGRANADOS, M FIERRO, JLG DELABANDA, JFG HEINEMANN, H TI EFFECT OF CALCINATION ON V-O-TI-P CATALYSTS SO STUDIES IN SURFACE SCIENCE AND CATALYSIS LA English DT Article AB The effect of the calcination temperature on V-O-Ti-P catalysts has been studied by different techniques, trying to relate their structure with their catalytic properties for SCR of NO(x), which are affected by that treatment. The results indicate that, during the catalyst preparation, several types of Ti phosphates are formed on anatase nuclei which can retain the vanadium ions in the bulk. Thermal treatments improve the crystallinity of those compounds and can produce their transformation or decomposition. In this process part of the vanadium is segregated to the sample surface, where it can stay as isolated cations or as vanadium oxide. The highest activity is found after a partial Ti-phosphate decomposition and formation of a V-P-O phase. C1 LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RP SORIA, J (reprint author), INST CATALISIS & PETROLEOQUIM, E-28049 MADRID, SPAIN. RI Conesa, Jose/H-6277-2011; jose, fierro/C-4774-2014 OI Conesa, Jose/0000-0001-9906-8520; Lopez Granados, Manuel/0000-0002-1269-0622; jose, fierro/0000-0002-6880-3737 NR 9 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2991 J9 STUD SURF SCI CATAL JI Stud. Surf. Sci. Catal. PY 1993 VL 75 BP 2717 EP 2720 PN C PG 4 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA MK934 UT WOS:A1993MK93400204 ER PT B AU JACKSON, B AF JACKSON, B GP SAS USERS GRP INT TI SAS(R) MACROS FOR CONVERTING BETWEEN ARC INFO(R) SINGLE VARIABLE FILES AND SAS DATA SETS SO SUGI 18: PROCEEDINGS OF THE EIGHTEENTH ANNUAL SAS USERS GROUP INTERNATIONAL CONFERENCE LA English DT Proceedings Paper CT 18th Annual SAS Users Group International Conference (SUGI 18) CY MAY 09-12, 1993 CL NEW YORK, NY SP SAS USERS GRP INT C1 OAK RIDGE NATL LAB,OAK RIDGE,TN. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SAS INST INC PI CARY PA SAS CIRCLE, PO BOX 8000, CARY, NC 27511 BN 1-55544-550-0 PY 1993 BP 836 EP 837 PG 2 WC Computer Science, Information Systems; Computer Science, Software Engineering SC Computer Science GA BA72C UT WOS:A1993BA72C00135 ER PT B AU GROSS, KC HOYER, KK AF GROSS, KC HOYER, KK GP SAS USERS GRP INT TI SIMSPRT - A SAS(R) CODE FOR SIMULATION OF SEQUENTIAL PROBABILITY RATIO TESTS SO SUGI 18: PROCEEDINGS OF THE EIGHTEENTH ANNUAL SAS USERS GROUP INTERNATIONAL CONFERENCE LA English DT Proceedings Paper CT 18th Annual SAS Users Group International Conference (SUGI 18) CY MAY 09-12, 1993 CL NEW YORK, NY SP SAS USERS GRP INT C1 ARGONNE NATL LAB,DIV REACTOR ANAL,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SAS INST INC PI CARY PA SAS CIRCLE, PO BOX 8000, CARY, NC 27511 BN 1-55544-550-0 PY 1993 BP 909 EP 914 PG 6 WC Computer Science, Information Systems; Computer Science, Software Engineering SC Computer Science GA BA72C UT WOS:A1993BA72C00150 ER PT S AU CRANE, JK PERRY, MD AF CRANE, JK PERRY, MD BE Piraux, B LHuillier, A Rzazewski, K TI HIGH-ORDER SUM AND DIFFERENCE-FREQUENCY-GENERATION IN HELIUM SO SUPER-INTENSE LASER-ATOM PHYSICS SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES B, PHYSICS LA English DT Proceedings Paper CT NATO Advanced Research Workshop on SILAP (Super-Intense Laser-Atom Physics) CY JAN 08-14, 1993 CL HAN-SUR-LESSE, BELGIUM SP NATO, SCI AFFAIRS DIV C1 LAWRENCE LIVERMORE NATL LAB,LASER PROGRAM,LIVERMORE,CA 94550. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0258-1221 BN 0-306-44587-5 J9 NATO ADV SCI INST SE PY 1993 VL 316 BP 43 EP 52 PG 10 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA BZ91G UT WOS:A1993BZ91G00005 ER PT S AU KULANDER, KC SCHAFER, KJ KRAUSE, JL AF KULANDER, KC SCHAFER, KJ KRAUSE, JL BE Piraux, B LHuillier, A Rzazewski, K TI DYNAMICS OF SHORT-PULSE EXCITATION, IONIZATION AND HARMONIC CONVERSION SO SUPER-INTENSE LASER-ATOM PHYSICS SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES B, PHYSICS LA English DT Proceedings Paper CT NATO Advanced Research Workshop on SILAP (Super-Intense Laser-Atom Physics) CY JAN 08-14, 1993 CL HAN-SUR-LESSE, BELGIUM SP NATO, SCI AFFAIRS DIV C1 LAWRENCE LIVERMORE NATL LAB,DEPT PHYS,LIVERMORE,CA 94551. NR 0 TC 253 Z9 253 U1 1 U2 8 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0258-1221 BN 0-306-44587-5 J9 NATO ADV SCI INST SE PY 1993 VL 316 BP 95 EP 110 PG 16 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA BZ91G UT WOS:A1993BZ91G00010 ER PT S AU DIMAURO, LF YANG, BR AF DIMAURO, LF YANG, BR BE Piraux, B LHuillier, A Rzazewski, K TI DYNAMICS OF DISSOCIATION VERSUS IONIZATION IN STRONG LASER FIELDS SO SUPER-INTENSE LASER-ATOM PHYSICS SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES B, PHYSICS LA English DT Proceedings Paper CT NATO Advanced Research Workshop on SILAP (Super-Intense Laser-Atom Physics) CY JAN 08-14, 1993 CL HAN-SUR-LESSE, BELGIUM SP NATO, SCI AFFAIRS DIV C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 0 TC 1 Z9 1 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0258-1221 BN 0-306-44587-5 J9 NATO ADV SCI INST SE PY 1993 VL 316 BP 341 EP 350 PG 10 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA BZ91G UT WOS:A1993BZ91G00029 ER PT S AU LERNER, PB LAGATTUTA, K COHEN, JS AF LERNER, PB LAGATTUTA, K COHEN, JS BE Piraux, B LHuillier, A Rzazewski, K TI QUASI-CLASSICAL APPROACH TO IONIZATION OF ATOMS BY STRONG LASER-PULSES - COMPARISON WITH THE SIMPLEMAN MODELS AND NEWTONIAN DYNAMICS SO SUPER-INTENSE LASER-ATOM PHYSICS SE NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES B, PHYSICS LA English DT Proceedings Paper CT NATO Advanced Research Workshop on SILAP (Super-Intense Laser-Atom Physics) CY JAN 08-14, 1993 CL HAN-SUR-LESSE, BELGIUM SP NATO, SCI AFFAIRS DIV C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 2 Z9 2 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0258-1221 BN 0-306-44587-5 J9 NATO ADV SCI INST SE PY 1993 VL 316 BP 413 EP 424 PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA BZ91G UT WOS:A1993BZ91G00035 ER PT S AU WARREN, MS SALMON, JK AF WARREN, MS SALMON, JK GP IEEE TI A PARALLEL HASHED OCT-TREE N-BODY ALGORITHM SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 77 Z9 77 U1 0 U2 1 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 12 EP 21 PG 10 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00002 ER PT S AU WELLS, JC OBERACKER, VE UMAR, AS BOTTCHER, C STRAYER, MR DRAKE, J FLANERY, R AF WELLS, JC OBERACKER, VE UMAR, AS BOTTCHER, C STRAYER, MR DRAKE, J FLANERY, R GP IEEE TI THE QUANTUM STRUCTURE OF MATTER GRAND CHALLENGE PROJECT - LARGE-SCALE 3-D SOLUTIONS IN RELATIVISTIC QUANTUM DYNAMICS SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. RI Wells, Jack/D-3675-2016 OI Wells, Jack/0000-0002-5083-3030 NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 44 EP & PG 0 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00005 ER PT S AU FOSTER, I KESSELMAN, C AF FOSTER, I KESSELMAN, C GP IEEE TI INTEGRATING TASK AND DATA PARALLELISM SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 ARGONNE NATL LAB,DEPT MATH & COMP SCI,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 154 EP 155 PG 2 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00016 ER PT S AU DONGARRA, JJ POZO, R WALKER, DW AF DONGARRA, JJ POZO, R WALKER, DW GP IEEE TI LAPACK++ - A DESIGN OVERVIEW OF OBJECT-ORIENTED EXTENSIONS FOR HIGH-PERFORMANCE LINEAR ALGEBRA SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 OAK RIDGE NATL LAB,DIV MATH SCI,OAK RIDGE,TN 37831. RI Walker, David/B-7978-2010 NR 0 TC 2 Z9 2 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 162 EP 171 PG 10 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00017 ER PT S AU LYNCH, VE CARRERAS, BA LEBOEUF, JN CURTIS, BC TROUTMAN, RL AF LYNCH, VE CARRERAS, BA LEBOEUF, JN CURTIS, BC TROUTMAN, RL GP IEEE TI MULTI-CPU PLASMA FLUID TURBULENCE CALCULATIONS ON A CRAY-Y-MP-C90 SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RI Lynch, Vickie/J-4647-2012 OI Lynch, Vickie/0000-0002-5836-7636 NR 0 TC 0 Z9 0 U1 0 U2 1 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 308 EP 316 PG 9 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00031 ER PT S AU HUNTER, C CHRISTIAN, C CROMP, R TREINISH, L AF HUNTER, C CHRISTIAN, C CROMP, R TREINISH, L GP IEEE TI PANEL ON SMART ACCESS TO LARGE SCIENTIFIC DATASETS SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 372 EP 373 PG 2 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00037 ER PT S AU SHAY, HD AF SHAY, HD GP IEEE TI NATIONAL INFORMATION INFRASTRUCTURE (NII) AT SUPERCOMPUTING-93 SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 376 EP 376 PG 1 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00038 ER PT S AU BROWN, JS AF BROWN, JS GP IEEE TI DEBUGGERS FOR HIGH-PERFORMANCE COMPUTERS SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 442 EP 445 PG 4 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00045 ER PT S AU STANBERRY, L AF STANBERRY, L GP IEEE TI PARALLEL C/C++ - CONVERGENCE OR DIVERGENCE SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 448 EP 449 PG 2 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00046 ER PT S AU GALBREATH, N GROPP, W LEVINE, D AF GALBREATH, N GROPP, W LEVINE, D GP IEEE TI APPLICATIONS-DRIVEN PARALLEL I/O SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 ARGONNE NATL LAB,DEPT MATH & COMP SCI,ARGONNE,IL 60439. NR 0 TC 5 Z9 5 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 462 EP 471 PG 10 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00048 ER PT S AU LOMDAHL, PS TAMAYO, P GRONBECHJENSEN, N BEAZLEY, DM AF LOMDAHL, PS TAMAYO, P GRONBECHJENSEN, N BEAZLEY, DM GP IEEE TI 50 GFLOPS MOLECULAR-DYNAMICS ON THE CONNECTION MACHINE-5 SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. NR 0 TC 3 Z9 3 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 520 EP & PG 0 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00055 ER PT S AU PAVLAKOS, CJ SCHOOF, LA MAREDA, JF AF PAVLAKOS, CJ SCHOOF, LA MAREDA, JF GP IEEE TI A VISUALIZATION ENVIRONMENT FOR SUPERCOMPUTING-BASED APPLICATIONS IN COMPUTATIONAL MECHANICS SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 SANDIA NATL LABS,DEPT 1425,APPL VISUALIZAT GRP,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 550 EP & PG 0 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00059 ER PT S AU CRAWFIS, R MAX, N BECKER, B CABRAL, B AF CRAWFIS, R MAX, N BECKER, B CABRAL, B GP IEEE TI VOLUME RENDERING OF 3D SCALAR AND VECTOR-FIELDS AT LLNL SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. NR 0 TC 2 Z9 2 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 570 EP & PG 0 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00061 ER PT S AU ORTEGA, FA HANSEN, CD AHRENS, JP AF ORTEGA, FA HANSEN, CD AHRENS, JP GP IEEE TI FAST DATA-PARALLEL POLYGON RENDERING SO SUPERCOMPUTING '93, PROCEEDINGS SE SUPERCOMPUTING PROCEEDINGS LA English DT Proceedings Paper CT Supercomputing 93 Conference CY NOV 15-19, 1993 CL PORTLAND, OR SP IEEE, COMP SOC, TECH COMM SUPERCOMPUT APPL & COMP ARCHITECTURE, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP ARCHITECTURE C1 LOS ALAMOS NATL LAB,X DIV NUMER LAB,LOS ALAMOS,NM 87545. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 SN 1063-9535 BN 0-8186-4340-4 J9 SUPERCOMP PROC PY 1993 BP 709 EP 718 PG 10 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA BA18A UT WOS:A1993BA18A00075 ER PT B AU MARTENS, JS HIETALA, VM ZIPPERIAN, TE GINLEY, DS TIGGES, CP AF MARTENS, JS HIETALA, VM ZIPPERIAN, TE GINLEY, DS TIGGES, CP BE Koch, H Lubbig, H TI THE SUPERCONDUCTING FLUX-FLOW TRANSISTOR - MODELS AND APPLICATIONS SO SUPERCONDUCTING DEVICES AND THEIR APPLICATIONS SE SPRINGER PROCEEDINGS IN PHYSICS LA English DT Proceedings Paper CT 4TH INTERNATIONAL CONFERENCE on Superconducting and Quantum Effect Devices and Their Applications (SQUID 91) CY JUN 18-21, 1991 CL BERLIN, GERMANY SP DR WILHELM HEINRICH HERAEUS & ELSE HERAEUS STIFT, JAPANESE GERMAN CTR BERLIN, PHYS TECH BUNDESANSTALT C1 SANDIA NATL LABS,DEPT 1140,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY BN 3-540-55396-7 J9 SPRINGER PROC PHYS PY 1993 VL 64 BP 186 EP 191 PG 6 WC Physics, Applied; Physics, Condensed Matter SC Physics GA BA73R UT WOS:A1993BA73R00031 ER PT B AU DUNCAN, RV AF DUNCAN, RV BE Koch, H Lubbig, H TI SUPERCONDUCTING INSTRUMENTATION FOR PRECISION-MEASUREMENT AND CONTROL SO SUPERCONDUCTING DEVICES AND THEIR APPLICATIONS SE SPRINGER PROCEEDINGS IN PHYSICS LA English DT Proceedings Paper CT 4TH INTERNATIONAL CONFERENCE on Superconducting and Quantum Effect Devices and Their Applications (SQUID 91) CY JUN 18-21, 1991 CL BERLIN, GERMANY SP DR WILHELM HEINRICH HERAEUS & ELSE HERAEUS STIFT, JAPANESE GERMAN CTR BERLIN, PHYS TECH BUNDESANSTALT C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN 33 PA HEIDELBERGER PLATZ 3, W-1000 BERLIN 33, GERMANY BN 3-540-55396-7 J9 SPRINGER PROC PHYS PY 1993 VL 64 BP 446 EP 450 PG 5 WC Physics, Applied; Physics, Condensed Matter SC Physics GA BA73R UT WOS:A1993BA73R00079 ER PT S AU PFUND, DM COCHRAN, HD AF PFUND, DM COCHRAN, HD BE Kiran, E Brennecke, JF TI CHEMICAL-POTENTIALS IN TERNARY SUPERCRITICAL FLUID MIXTURES SO SUPERCRITICAL FLUID ENGINEERING SCIENCE: FUNDAMENTALS AND APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Review CT SYMP ON SUPERCRITICAL FLUID ENGINEERING SCIENCE, AT THE 1991 ANNUAL MEETING OF THE AMERICAN INST OF CHEMICAL ENGINEERS CY NOV 17-22, 1991 CL LOS ANGELES, CA SP AMER INST CHEM ENGINEERS RP PFUND, DM (reprint author), BATTELLE MEM INST,PACIFIC NW LABS,DEPT CHEM SCI,RICHLAND,WA 99352, USA. NR 0 TC 6 Z9 6 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA WASHINGTON SN 0097-6156 BN 0-8412-2513-3 J9 ACS SYM SER PY 1993 VL 514 BP 149 EP 157 PG 9 WC Engineering, Chemical SC Engineering GA BX40F UT WOS:A1993BX40F00012 ER PT S AU PFUND, DM FULTON, JL SMITH, RD AF PFUND, DM FULTON, JL SMITH, RD BE Kiran, E Brennecke, JF TI AGGREGATION OF METHANOL IN SUPERCRITICAL FLUIDS - A MOLECULAR-DYNAMICS STUDY SO SUPERCRITICAL FLUID ENGINEERING SCIENCE: FUNDAMENTALS AND APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Review CT SYMP ON SUPERCRITICAL FLUID ENGINEERING SCIENCE, AT THE 1991 ANNUAL MEETING OF THE AMERICAN INST OF CHEMICAL ENGINEERS CY NOV 17-22, 1991 CL LOS ANGELES, CA SP AMER INST CHEM ENGINEERS RP PFUND, DM (reprint author), BATTELLE MEM INST,PACIFIC NW LABS,DEPT CHEM SCI,CHEM METHODS & SEPARAT GRP,RICHLAND,WA 99352, USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 0 TC 8 Z9 8 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA WASHINGTON SN 0097-6156 BN 0-8412-2513-3 J9 ACS SYM SER PY 1993 VL 514 BP 158 EP 174 PG 17 WC Engineering, Chemical SC Engineering GA BX40F UT WOS:A1993BX40F00013 ER PT S AU FULTON, JL YEE, GG SMITH, RD AF FULTON, JL YEE, GG SMITH, RD BE Kiran, E Brennecke, JF TI HYDROGEN-BONDING OF SIMPLE ALCOHOLS IN SUPERCRITICAL FLUIDS - AN FTIR STUDY SO SUPERCRITICAL FLUID ENGINEERING SCIENCE: FUNDAMENTALS AND APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Review CT SYMP ON SUPERCRITICAL FLUID ENGINEERING SCIENCE, AT THE 1991 ANNUAL MEETING OF THE AMERICAN INST OF CHEMICAL ENGINEERS CY NOV 17-22, 1991 CL LOS ANGELES, CA SP AMER INST CHEM ENGINEERS RP FULTON, JL (reprint author), BATTELLE MEM INST,PACIFIC NW LABS,DEPT CHEM SCI,CHEM METHODS & SEPARAT GRP,RICHLAND,WA 99352, USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 0 TC 16 Z9 16 U1 2 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA WASHINGTON SN 0097-6156 BN 0-8412-2513-3 J9 ACS SYM SER PY 1993 VL 514 BP 175 EP 187 PG 13 WC Engineering, Chemical SC Engineering GA BX40F UT WOS:A1993BX40F00014 ER PT S AU ZEMANIAN, TS FULTON, JL SMITH, RD AF ZEMANIAN, TS FULTON, JL SMITH, RD BE Kiran, E Brennecke, JF TI DYNAMIC FLUORESCENCE QUENCHING IN REVERSE MICROEMULSIONS IN PROPANE SO SUPERCRITICAL FLUID ENGINEERING SCIENCE: FUNDAMENTALS AND APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Review CT SYMP ON SUPERCRITICAL FLUID ENGINEERING SCIENCE, AT THE 1991 ANNUAL MEETING OF THE AMERICAN INST OF CHEMICAL ENGINEERS CY NOV 17-22, 1991 CL LOS ANGELES, CA SP AMER INST CHEM ENGINEERS RP ZEMANIAN, TS (reprint author), BATTELLE MEM INST,PACIFIC NW LABS,DEPT CHEM SCI,CHEM METHODS & SEPARAT GRP,POB 999,RICHLAND,WA 99352, USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 0 TC 3 Z9 3 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA WASHINGTON SN 0097-6156 BN 0-8412-2513-3 J9 ACS SYM SER PY 1993 VL 514 BP 258 EP 270 PG 13 WC Engineering, Chemical SC Engineering GA BX40F UT WOS:A1993BX40F00020 ER PT J AU YEH, CY ZHANG, SB FROYEN, S ZUNGER, A AF YEH, CY ZHANG, SB FROYEN, S ZUNGER, A TI CONFINEMENT EFFECTS IN SUPPORTED VS ISOLATED QUANTUM STRUCTURES - A STUDY OF SI(001) FILMS SO SUPERLATTICES AND MICROSTRUCTURES LA English DT Article DE QUANTUM STRUCTURE; QUANTUM CONFINEMENT; SI FILM; EFFECTIVE MASS AB A conventional quantum well is a supported quantum structure whereas a free-standing film is an isolated quantum structure. The application of the effective mass particle-in-a-well approach (EMA) to quantum wells leads to the well-known quantization rule whereby the lowest, j = 0 quantum state is forbidden, The EMA identifies these forbidden states with the bottom of the potential wells at the band energy minima and maxima for each band n. Direct pseudopotential band structure calculations for free standing silicon films are compared here with such EMA solutions. While near the band energy minima the EMA wavefunctions agree with the results of the direct approach, they disagree completely near the band energy maxima. The standard EMA forbidden states GAMMA1v, GAMMA25'v, GAMMA25'v, GAMMA25'v, and DELTA(min) for n=1,2,3.4, and 5, respectively, are all potential well minimum states, whereas the forbidden states found in the direct calculation, GAMMA1v, X1v, X4v, X4v, DELTA(min) and X1c for bands n=1.2,3,4,5 and 6, respectively, are all band minimum energy states. At the valence band maximum GAMMA25,v, direct calculations reveal a novel quantum state of constant envelope functions, whose energy does not vary with film's size. Such a ''zero confinement state'' is absent in the EMA quantum well problem. RP YEH, CY (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. RI Zunger, Alex/A-6733-2013; Krausnick, Jennifer/D-6291-2013; Zhang, Shengbai/D-4885-2013 OI Zhang, Shengbai/0000-0003-0833-5860 NR 5 TC 1 Z9 1 U1 0 U2 1 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0749-6036 J9 SUPERLATTICE MICROST JI Superlattices Microstruct. PY 1993 VL 14 IS 2-3 BP 141 EP 148 DI 10.1006/spmi.1993.1115 PG 8 WC Physics, Condensed Matter SC Physics GA PG224 UT WOS:A1993PG22400003 ER PT J AU WEMAN, H JONES, ED MCINTYRE, CR MILLER, MS PETROFF, PM MERZ, JL AF WEMAN, H JONES, ED MCINTYRE, CR MILLER, MS PETROFF, PM MERZ, JL TI MAGNETOLUMINESCENCE STUDY OF QUANTUM WIRE ARRAYS IN (AL,GA)AS SERPENTINE SUPERLATTICE STRUCTURES SO SUPERLATTICES AND MICROSTRUCTURES LA English DT Article ID INDUCED LATERAL CONFINEMENT; OPTICAL-TRANSITIONS; WELLS; PHOTOLUMINESCENCE; EMISSION C1 UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093. UNIV CALIF SANTA BARBARA,CTR QUANTIZED ELECTR STRUCT,SANTA BARBARA,CA 93106. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. UNIV CALIF SANTA BARBARA,DEPT ELECT & COMP ENGN,SANTA BARBARA,CA 93106. UNIV CALIF SANTA BARBARA,DEPT MAT,SANTA BARBARA,CA 93106. RP WEMAN, H (reprint author), LINKOPING UNIV,DEPT PHYS,S-58183 LINKOPING,SWEDEN. RI Weman, Helge/A-6245-2013 NR 18 TC 17 Z9 17 U1 0 U2 0 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0749-6036 J9 SUPERLATTICE MICROST JI Superlattices Microstruct. PY 1993 VL 13 IS 1 BP 5 EP 9 DI 10.1006/spmi.1993.1002 PG 5 WC Physics, Condensed Matter SC Physics GA KK137 UT WOS:A1993KK13700002 ER PT J AU RUF, T WALD, K YU, PY TSEN, KT MORKOC, H CHAN, KT AF RUF, T WALD, K YU, PY TSEN, KT MORKOC, H CHAN, KT TI STUDY OF ELECTRON-PHONON INTERACTION IN QUANTUM-WELLS USING OPTICALLY-EXCITED NONEQUILIBRIUM POPULATION OF PHONONS SO SUPERLATTICES AND MICROSTRUCTURES LA English DT Article ID GAAS-ALAS SUPERLATTICES; RAMAN-SCATTERING; CONFINED LO; MODES; HETEROSTRUCTURES C1 UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. ARIZONA STATE UNIV, DEPT PHYS, TEMPE, AZ 85287 USA. UNIV ILLINOIS, COORDINATED SCI LAB, URBANA, IL 61801 USA. HEWLETT PACKARD CO, DIV MICROWAVE TECHNOL, SANTA ROSA, CA 95403 USA. NR 25 TC 14 Z9 14 U1 0 U2 1 PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0749-6036 J9 SUPERLATTICE MICROST JI Superlattices Microstruct. PY 1993 VL 13 IS 2 BP 203 EP 208 DI 10.1006/spmi.1993.1039 PG 6 WC Physics, Condensed Matter SC Physics GA LA095 UT WOS:A1993LA09500014 ER PT J AU JANKOWSKI, AF OLSEN, BL AF JANKOWSKI, AF OLSEN, BL TI FORMATION OF TEXTURED YBA2CU3OX FILMS BY LASER-ABLATION SO SUPERLATTICES AND MICROSTRUCTURES LA English DT Article ID SUPERCONDUCTING THIN-FILMS; YBA2CU3O7-X-PRBA2CU3O7-Y HETEROSTRUCTURES; GROWTH RP JANKOWSKI, AF (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 9 TC 1 Z9 1 U1 0 U2 0 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0749-6036 J9 SUPERLATTICE MICROST JI Superlattices Microstruct. PY 1993 VL 13 IS 3 BP 299 EP 302 DI 10.1006/spmi.1993.1060 PG 4 WC Physics, Condensed Matter SC Physics GA LN802 UT WOS:A1993LN80200005 ER PT J AU ARENT, DJ SZMYD, D HANNA, MC JONES, KM NOZIK, AJ SPRINGTHORPE, AJ MAJEED, A AF ARENT, DJ SZMYD, D HANNA, MC JONES, KM NOZIK, AJ SPRINGTHORPE, AJ MAJEED, A TI HOT-ELECTRON COOLING IN PARABOLIC AND MODULATION-DOPED QUANTUM-WELLS AND DOPED SUPERLATTICES SO SUPERLATTICES AND MICROSTRUCTURES LA English DT Article ID ENERGY-LOSS RATES; TIME-RESOLVED PHOTOLUMINESCENCE; CARRIER RELAXATION; PICOSECOND RELAXATION; STRAINED-LAYER; BULK GAAS; INJECTION; HETEROSTRUCTURES; SPECTROSCOPY; DEPENDENCE C1 BELL NO RES LTD,OTTAWA K1Y 4H7,ON,CANADA. RP ARENT, DJ (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 44 TC 1 Z9 1 U1 0 U2 1 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0749-6036 J9 SUPERLATTICE MICROST JI Superlattices Microstruct. PY 1993 VL 13 IS 4 BP 459 EP 468 DI 10.1006/spmi.1993.1087 PG 10 WC Physics, Condensed Matter SC Physics GA MF338 UT WOS:A1993MF33800010 ER PT J AU ZINKEALLMANG, M TRINGIDES, MC AF ZINKEALLMANG, M TRINGIDES, MC TI COMPARISON OF SURFACE-DIFFUSION MODELS FOR NEOPENTANE ON RU(001) SO SURFACE SCIENCE LA English DT Letter ID SINGLE-CRYSTAL SURFACES; ADSORBATE DIFFUSION; DESORPTION-KINETICS; INTERACTIVE SYSTEMS; COEFFICIENTS; TUNGSTEN; SI(111); LAYERS; OXYGEN; AG AB In this letter we compare two recent models for the observation of concentration dependent diffusion coefficients in the system neopentane, C(CH3)4, on Ru(001) surfaces. Both a multi-site hopping model where adatoms jump over several lattice sites, and a clustering model in which adatoms jump only to the next minimum of the surface potential but stick to clusters for some time, give good agreement with the existing data. Thus both models may be considered alternative proposals for the actual physical process. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,DEPT PHYS,AMES,IA 50011. RP ZINKEALLMANG, M (reprint author), UNIV WESTERN ONTARIO,DEPT PHYS,LONDON N6A 3K7,ONTARIO,CANADA. NR 26 TC 0 Z9 0 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD JAN 1 PY 1993 VL 280 IS 1-2 BP L273 EP L277 DI 10.1016/0039-6028(93)90350-S PG 5 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA KF795 UT WOS:A1993KF79500007 ER PT J AU BOHNEN, KP HO, KM AF BOHNEN, KP HO, KM TI STRUCTURE AND DYNAMICS AT METAL-SURFACES SO SURFACE SCIENCE REPORTS LA English DT Article ID TOTAL-ENERGY CALCULATIONS; PHONON-DISPERSION-CURVES; EMBEDDED-ATOM-METHOD; MULTILAYER LATTICE-RELAXATION; RECONSTRUCTED AU(110) SURFACE; LEED INTENSITY ANALYSIS; 100 CRYSTAL FACES; ELECTRONIC-STRUCTURE; ION-SCATTERING; TRANSITION-METALS AB Using first-principles total-energy calculations, lattice relaxation, reconstruction and surface phonons have been determined for various metal surfaces. Use of the Hellmann-Feynman theorem allows for a very efficient determination of equilibrium geometries and interplanar force constants. Results for simple metals as well as for noble metals will be presented and compared with available experimental information from LEED, ion channeling, helium scattering and EELS as well as with other theoretical treatments. C1 IOWA STATE UNIV SCI & TECHNOL, US DOE, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS, AMES, IA 50011 USA. RP BOHNEN, KP (reprint author), KERNFORSCHUNGSZENTRUM KARLSRUHE, INST NUKL FESTKORPERPHYS, POB 3640, D-76021 KARLSRUHE, GERMANY. NR 158 TC 50 Z9 50 U1 1 U2 15 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-5729 EI 1879-274X J9 SURF SCI REP JI Surf. Sci. Rep. PY 1993 VL 19 IS 3-6 BP 99 EP 120 DI 10.1016/0167-5729(93)90007-C PG 22 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA MQ112 UT WOS:A1993MQ11200004 ER PT J AU VEAL, BW LIU, R PAULIKAS, AP KOELLING, DD SHI, HO DOWNEY, JW OLSON, CG ARKO, AJ JOYCE, JJ BLYTHE, R AF VEAL, BW LIU, R PAULIKAS, AP KOELLING, DD SHI, HO DOWNEY, JW OLSON, CG ARKO, AJ JOYCE, JJ BLYTHE, R TI ELECTRONIC-STRUCTURE STUDIES OF YBA2CU3OX (6.2-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-6.9) USING ANGLE-RESOLVED PHOTOEMISSION SO SURFACE SCIENCE REPORTS LA English DT Article ID CHARGE-TRANSFER EXCITATIONS; FERMI-SURFACE; ROOM-TEMPERATURE; HOLE CONCENTRATION; SINGLE-CRYSTALS; BAND-STRUCTURE; STATE; SUPERCONDUCTIVITY; BI2SR2CACU2O8; LIQUID AB Using high-resolution angle-resolved photoemission, the electronic structure of YBa2Cu3Ox is examined when oxygen stoichiometries are varied in the range 6.2 less-than-or-equal-to x less-than-or-equal-to 6.9. Detailed measurements of the Fermi surface for YBa2Cu3O6.9 are presented and are compared with predictions of band theory. In the metallic region of the phase diagram, changes in the Fermi surfaces are measured as a function of oxygen stoichiometry. The electronic structure is monitored as the oxide changes from a metal to a semiconductor with additional oxygen depletion. For intermediate stoichiometries, effects of oxygen-vacancy ordering are considered. Unusual resonant effects observed at several photon energies are examined as the oxygen content is varied. C1 ARGONNE NATL LAB, SCI & TECHNOL CTR SUPERCOND, ARGONNE, IL 60439 USA. IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS, AMES, IA 50011 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. RP VEAL, BW (reprint author), ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. NR 49 TC 8 Z9 8 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-5729 EI 1879-274X J9 SURF SCI REP JI Surf. Sci. Rep. PY 1993 VL 19 IS 3-6 BP 121 EP 142 DI 10.1016/0167-5729(93)90008-D PG 22 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA MQ112 UT WOS:A1993MQ11200005 ER PT J AU KAZMERSKI, LL AF KAZMERSKI, LL TI MICROCHARACTERIZATION TO NANO-CHARACTERIZATION OF SEMICONDUCTOR GRAIN-BOUNDARIES SO SURFACE SCIENCE REPORTS LA English DT Article; Proceedings Paper CT 10th International Summer Institute in Surface Science: Tutorials on Selected Topics in Modern Surface Science (ISISS 1992) CY JUN 29-JUL 02, 1992 CL UNIV WISCONSIN MILWAUKEE, MILWAUKEE, WI SP UNIV WISCONSIN MILWAUKEE, LAB SURFACE STUDIES HO UNIV WISCONSIN MILWAUKEE ID SHALLOW ACCEPTOR LEVELS; ATOMIC-HYDROGEN; THIN-FILMS; SILICON; NEUTRALIZATION; CHEMISTRY; DIFFUSION; PASSIVATION; CRYSTALS; ALUMINUM AB This paper examines the use of surface-analysis methods in the characterization of grain boundaries in semiconductors. The purpose is to demonstrate the utility of increasing spatial resolution in the evaluation of defects. Three distinct mechanisms for adjusting the electronic properties of defect regions of semiconductors are presented. These include the passivation of grain boundaries by chemical methods; the electrical neutralization of shallow acceptor impurities; and, the doping of the defect regions. Secondary ion mass spectrometry, Auger electron spectroscopy and specialized scanning tunneling microscopy are used to evaluate the grain-boundary structure, composition and chemistry. Complementary macro- and nano-electro-optical characterization techniques based on electron-beam-induced current and photoluminescence provide correlated information on the effects of the chemical-treatment methods. RP KAZMERSKI, LL (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 61 TC 6 Z9 6 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-5729 J9 SURF SCI REP JI Surf. Sci. Rep. PY 1993 VL 19 IS 3-6 BP 169 EP 189 DI 10.1016/0167-5729(93)90010-M PG 21 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA MQ112 UT WOS:A1993MQ11200007 ER PT J AU VANHOVE, MA MORITZ, W OVER, H ROUS, PJ WANDER, A BARBIERI, A MATERER, N STARKE, U SOMORJAI, GA AF VANHOVE, MA MORITZ, W OVER, H ROUS, PJ WANDER, A BARBIERI, A MATERER, N STARKE, U SOMORJAI, GA TI AUTOMATED-DETERMINATION OF COMPLEX SURFACE-STRUCTURES BY LEED SO SURFACE SCIENCE REPORTS LA English DT Article; Proceedings Paper CT 10th International Summer Institute in Surface Science: Tutorials on Selected Topics in Modern Surface Science (ISISS 1992) CY JUN 29-JUL 02, 1992 CL UNIV WISCONSIN MILWAUKEE, MILWAUKEE, WI SP UNIV WISCONSIN MILWAUKEE, LAB SURFACE STUDIES HO UNIV WISCONSIN MILWAUKEE ID ENERGY-ELECTRON-DIFFRACTION; TENSOR-LEED; MULTILAYER RELAXATION; CRYSTALLOGRAPHY; RECONSTRUCTION; C(2X2)O/NI(100); APPROXIMATION; INTENSITIES; SCATTERING; DEPENDENCE AB Conventional surface crystallography by low-energy electron diffraction (LEED) employs a trial-and-error search controlled at each step by human effort. This trial-and-error approach becomes very cumbersome and unreliable to solve complex surfaces with a large number of unknown structural parameters. We discuss automatic optimization procedures for LEED, which combine numerical search algorithms with efficient methods of determining the diffracted intensities for varying structures. Such approaches can reduce the computer time required for an entire structure determination by many orders of magnitude, while fitting many times more unknown structural parameters. Thereby, relatively complex structures, with typically 10 adjustable atoms (or 30 adjustable coordinates), can be readily determined on today's workstations. These include non-symmetrically relaxed structures, surface reconstructions and adsorbate-induced substrate distortions. We also address the theoretical and experimental requirements for an accurate structural determination. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV MUNICH,INST KRISTALLOG & MINERAL,W-8000 MUNICH 2,GERMANY. UNIV CAMBRIDGE,DEPT PHYS CHEM,CAMBRIDGE CB2 1EW,ENGLAND. UNIV MARYLAND,DEPT PHYS,CATONSVILLE,MD 21228. MAX PLANCK GESELL,FRITZ HABER INST,W-1000 BERLIN 33,GERMANY. RP VANHOVE, MA (reprint author), LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720, USA. RI Van Hove, Michel/A-9862-2008 OI Van Hove, Michel/0000-0002-8898-6921 NR 84 TC 213 Z9 213 U1 1 U2 17 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-5729 J9 SURF SCI REP JI Surf. Sci. Rep. PY 1993 VL 19 IS 3-6 BP 191 EP 229 DI 10.1016/0167-5729(93)90011-D PG 39 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA MQ112 UT WOS:A1993MQ11200008 ER PT J AU FADLEY, CS AF FADLEY, CS TI DIFFRACTION AND HOLOGRAPHY WITH PHOTOELECTRONS AND AUGER ELECTRONS - SOME NEW DIRECTIONS SO SURFACE SCIENCE REPORTS LA English DT Article ID X-RAY-PHOTOELECTRON; EMISSION HOLOGRAPHY; SURFACE-STRUCTURES; ATOMIC-RESOLUTION; PHASE-TRANSITION; GE(111) SURFACE; VALENCE BANDS; MEDIUM-ENERGY; TILTED CO; SCATTERING AB The current status of photoelectron and Auger-electron diffraction is reviewed, with emphasis on new directions of activity. The use of forward scattering in the study of adsorbed molecules, epitaxial overlayers, and clean surfaces is one of the most developed applications, and one that will become more powerful as higher energy resolution and perhaps spin analysis are used to resolve emitters on the basis of chemical state, position at a surface, or magnetic state. The use of larger data sets spanning a considerable fraction of the solid angle above a surface will also much enhance the structural information available, for example, in the growth of epitaxial layers or nanostructures on surfaces. Detailed fitting of experimental data to theoretical calculations based upon either single scattering or multiple scattering should also provide more rich structural information, including such parameters as substrate interlayer relaxation. Surface phase transitions in which near-surface layers become highly disordered can also be studied, with results that are complementary to those from such techniques as low-energy electron diffraction and medium-energy ion scattering. Short-range magnetic order also can be probed by somehow resolving the spin of the outgoing electrons, e.g. by using multiplet-split core levels. Valence levels also are found to exhibit core-like diffraction effects in cases for which there is somehow rather complete integration over the bands involved, e.g., through working at higher photon energies, higher temperatures and/or integrating over energy in spectra. The possibility of holographically analyzing large-scale diffraction data sets so as to directly yield three-dimensional atomic images is also promising for certain types of problems, especially adsorbates or thin overlayers. Although several types of aberrations and artifacts arise with such holographic images, a number of correction procedures appear possible, and tests of these in model calculations and for a few sets of experimental data are encouraging. Although the application of this type of analysis to multilayer substrate emission is still somewhat problematic in showing atomic images that are severely elongated, this is not necessarily true for adsorbate emission. A recent experimental and theoretical study of an adsorbate using a selected data range yields promising results. Finally, theoretical calculations indicate that it should also be possible to apply the holographic methodology to the direct imaging of short-range magnetic order. C1 LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. RP UNIV CALIF DAVIS, DAVIS, CA 95616 USA. NR 88 TC 151 Z9 151 U1 2 U2 17 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-5729 EI 1879-274X J9 SURF SCI REP JI Surf. Sci. Rep. PY 1993 VL 19 IS 3-6 BP 231 EP 264 DI 10.1016/0167-5729(93)90012-E PG 34 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA MQ112 UT WOS:A1993MQ11200009 ER PT J AU WILLIAMS, JM AF WILLIAMS, JM GP SURFACES BIOMAT FDN TI ION-IMPLANTATION OF ORTHOPEDIC ALLOYS SO SURFACES IN BIOMATERIALS SYMPOSIUM LA English DT Meeting Abstract CT Surfaces in Biomaterials Symposium CY SEP 13-15, 1993 CL CAMBRIDGE, MA SP SURFACES BIOMAT FDN INC C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SURFACES BIOMATERIALS FDN PI MINNEAPOLIS PA PO BOX 26111, MINNEAPOLIS, MN 55426-0111 PY 1993 BP 26 EP 28 PG 3 WC Materials Science, Biomaterials SC Materials Science GA BA72K UT WOS:A1993BA72K00006 ER PT B AU GINOCCHIO, JN HAXTON, WC AF GINOCCHIO, JN HAXTON, WC BE Gruber, B TI THE FRACTIONAL QUANTUM HALL-EFFECT AND THE ROTATION GROUP SO SYMMETRIES IN SCIENCE VI: FROM THE ROTATION GROUP TO QUANTUM ALGEBRAS LA English DT Proceedings Paper CT Symposium on Symmetries in Science VI: From the Rotation Group to Quantum Algebras CY AUG 02-07, 1992 CL BREGENZ, AUSTRIA C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 1 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44584-0 PY 1993 BP 263 EP 273 PG 11 WC Physics, Particles & Fields; Physics, Mathematical SC Physics GA BZ88T UT WOS:A1993BZ88T00023 ER PT B AU LOUCK, JD AF LOUCK, JD BE Gruber, B TI FROM THE ROTATION GROUP TO THE POINCARE GROUP SO SYMMETRIES IN SCIENCE VI: FROM THE ROTATION GROUP TO QUANTUM ALGEBRAS LA English DT Proceedings Paper CT Symposium on Symmetries in Science VI: From the Rotation Group to Quantum Algebras CY AUG 02-07, 1992 CL BREGENZ, AUSTRIA C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44584-0 PY 1993 BP 455 EP 468 PG 14 WC Physics, Particles & Fields; Physics, Mathematical SC Physics GA BZ88T UT WOS:A1993BZ88T00037 ER PT B AU CASTEN, RF WOLF, A AF CASTEN, RF WOLF, A BE Gruber, B Otsuka, T TI EFFECTIVE CHARGES, THE VALENCE P-N INTERACTION, AND THE IBM SO SYMMETRIES IN SCIENCE VII: SPECTRUM-GENERATING ALGEBRAS AND DYNAMIC SYMMETRIES IN PHYSICS LA English DT Proceedings Paper CT Symposium on Symmetries VII: Spectrum Generating Algebras amd Dynamic Symmetries in Physics CY AUG 28-31, 1992 CL SO ILLINOIS UNIV CARBONADALE NIIGATA, NIIGATA, JAPAN HO SO ILLINOIS UNIV CARBONADALE NIIGATA C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44586-7 PY 1993 BP 133 EP 139 PG 7 WC Physics, Nuclear; Physics, Mathematical SC Physics GA BA69A UT WOS:A1993BA69A00013 ER PT B AU GINOCCHIO, JN LEVIATAN, A AF GINOCCHIO, JN LEVIATAN, A BE Gruber, B Otsuka, T TI AN INTRINSIC STATE WITH DEFINITE ISOSPIN FOR IBM-3 SO SYMMETRIES IN SCIENCE VII: SPECTRUM-GENERATING ALGEBRAS AND DYNAMIC SYMMETRIES IN PHYSICS LA English DT Proceedings Paper CT Symposium on Symmetries VII: Spectrum Generating Algebras amd Dynamic Symmetries in Physics CY AUG 28-31, 1992 CL SO ILLINOIS UNIV CARBONADALE NIIGATA, NIIGATA, JAPAN HO SO ILLINOIS UNIV CARBONADALE NIIGATA C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44586-7 PY 1993 BP 201 EP 213 PG 13 WC Physics, Nuclear; Physics, Mathematical SC Physics GA BA69A UT WOS:A1993BA69A00019 ER PT J AU BIEGON, A MATHIS, C AF BIEGON, A MATHIS, C TI EVALUATION OF [H-3] PAROXETINE AS AN INVIVO LIGAND FOR SEROTONIN UPTAKE SITES - A QUANTITATIVE AUTORADIOGRAPHIC STUDY IN THE RAT-BRAIN SO SYNAPSE LA English DT Article DE INVIVO IMAGING; AUTORADIOGRAPHY; ANTIDEPRESSANT ID ANTIDEPRESSANT BINDING-SITES; H-3 PAROXETINE BINDING; LOW-AFFINITY BINDING; REGIONAL DISTRIBUTION; IMIPRAMINE; LOCALIZATION; IMIPRAMINE; 3,4-METHYLENEDIOXYMETHAMPHETAMINE AB Paroxetine, a selective inhibitor of serotonin uptake and an antidepressant, was used in conjunction with quantitative ex vivo autoradiography to study the feasibility of imaging serotonin terminals in the living brain. Tritiated paroxetine was injected in the rat tail vein, and the brain was processed for quantitative autoradiography 3 hours later. Animals received either [H-3]paroxetine alone (100 muCi/animal) or a mixture of labeled paroxetine (100 muCi) and an excess of unlabeled drug (0.5 or 2 mg/kg intravenously [i.v.]). Computerized image analysis of the resulting autoradiograms revealed high densities of radioactivity in brain regions known to contain high densities of serotonergic terminals and high specific binding of [H-3]paroxetine in vitro, such as the raphe nuclei, interpeduncular nucleus, basolateral amygdala, substantia nigra, and some hypothalamic nuclei, Radioactivity uptake in these brain regions was effectively blocked (50-72%) by coadministration of excess unlabeled paroxetine. However, cortical and hippocampal binding of paroxetine in vivo was moderately high, in contrast to the relatively sparse serotonergic innervation in these regions. Only a relatively small proportion of cortical and hippocampal binding (20-40%) could be blocked by excess unlabeled paroxetine, indicating that most of the radioactivity in these regions is not associated with serotonin terminals or uptake sites. The usefulness of [H-3]paroxetine as an in vivo ligand for imaging serotonin terminals in the human brain is limited by these nonserotonergic binding sites. RP BIEGON, A (reprint author), LAWRENCE BERKELEY LAB,DIV RES MED & RADIAT BIOPHYS,BERKELEY,CA 94720, USA. FU NINDS NIH HHS [NS22899] NR 24 TC 15 Z9 15 U1 0 U2 1 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-4476 J9 SYNAPSE JI Synapse PD JAN PY 1993 VL 13 IS 1 BP 1 EP 9 DI 10.1002/syn.890130102 PG 9 WC Neurosciences SC Neurosciences & Neurology GA KD764 UT WOS:A1993KD76400001 PM 8427010 ER PT J AU KRAUS, GA CHEN, L JACOBSON, RA AF KRAUS, GA CHEN, L JACOBSON, RA TI SYNTHESIS AND EVALUATION OF A PLEUROTIN ANALOG SO SYNTHETIC COMMUNICATIONS LA English DT Article ID ETHERS AB The photoenolization/Diels-Alder sequence provides a direct preparation of quinone 2 which exhibited activity against SR leukemia and colon cancers. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP KRAUS, GA (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011, USA. NR 16 TC 4 Z9 4 U1 2 U2 4 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0039-7911 J9 SYNTHETIC COMMUN JI Synth. Commun. PY 1993 VL 23 IS 14 BP 2041 EP 2049 DI 10.1080/00397919308009864 PG 9 WC Chemistry, Organic SC Chemistry GA LN029 UT WOS:A1993LN02900016 ER PT J AU GATRONE, RC JONSON, SD AF GATRONE, RC JONSON, SD TI THE INFLUENCE OF RADICAL STABILITY OF ORGANOMAGNESIUM HALIDE REAGENTS ON THE DIRECTION OF ADDITION TO AN ALPHA,BETA-UNSATURATED PHOSPHORYL GROUP SO SYNTHETIC COMMUNICATIONS LA English DT Article ID GRIGNARD-REAGENTS; KETONES; TERTIARY AB The addition of Grignard reagents with increasing radical character to alpha,beta-unsaturated phosphoryl groups was found to occur with a corresponding increase in the yield of the aromatic substitution products. Molecular modelling was used to determine that the radical character has a greater role in determining the degree of aromatic substitution than does steric parameters. RP GATRONE, RC (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 15 TC 0 Z9 0 U1 0 U2 1 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 SN 0039-7911 J9 SYNTHETIC COMMUN JI Synth. Commun. PY 1993 VL 23 IS 19 BP 2743 EP 2751 DI 10.1080/00397919308013805 PG 9 WC Chemistry, Organic SC Chemistry GA MA189 UT WOS:A1993MA18900014 ER PT J AU WHITAKER, MJ AF WHITAKER, MJ TI DETERMINATION OF HYDROGEN-PEROXIDE IN REACTOR MODERATOR SOLUTIONS BY FLOW-INJECTION ANALYSIS SO TALANTA LA English DT Article; Proceedings Paper CT 1992 WINTER CONF ON FLOW-INJECTION ANALYSIS CY JAN 12-15, 1992 CL SCOTTSDALE, AZ AB A flow injection analysis (FIA) method for the determination of hydrogen peroxide in reactor moderator water has been developed and installed at the Savannah River Site (SRS) Water Quality Laboratory. The mode of detection is amperometric and the technique has an analytical range of 0.10-2.50 mug/ml with a sampling rate of 40 samples/hour. The calibration curve is linear with a correlation coefficient of 0.999 and the relative standard deviation is at the 0.50% level for both 0. 10- and 2.50-mug/ml standards. When the FIA procedure is compared to the manual method previously used at the SRS Water Quality Laboratory for hydrogen peroxide analysis, it demonstrates a minimum twenty minute reduction in analysis time per sample and the total liquid waste generated per sample analyzed is reduced by 95%. RP WHITAKER, MJ (reprint author), WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER SITE,AIKEN,SC 29808, USA. NR 6 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-9140 J9 TALANTA JI Talanta PD JAN PY 1993 VL 40 IS 1 BP 113 EP 117 DI 10.1016/0039-9140(93)80149-L PG 5 WC Chemistry, Analytical SC Chemistry GA KL384 UT WOS:A1993KL38400014 PM 18965603 ER PT B AU RAGAINI, RC AF RAGAINI, RC BE Avogadro, A Ragaini, RC TI TECHNOLOGIES FOR ENVIRONMENTAL CLEANUP - SOIL AND GROUND-WATER SO TECHNOLOGIES FOR ENVIRONMENTAL CLEANUP: SOIL AND GROUNDWATER SE EUROCOURSES-ENVIRONMENTAL MANAGEMENT LA English DT Proceedings Paper CT Eurocourse on Technologies for Environmental Cleanup: Soil and Groundwater CY SEP 21-25, 1992 CL JOINT RES CTR, ISPRA, ITALY SP COMMISS EUROPEAN COMMUNITIES ISPRA, JOINT RES CTR, LAWRENCE LIVERMORE NATL LAB, US DOE HO JOINT RES CTR C1 LAWRENCE LIVERMORE NATL LAB,DEPT ENVIRONM PROTECT,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2145-6 J9 EURO ENVIRONM MANAG PY 1993 VL 1 BP 1 EP 12 PG 12 WC Engineering, Environmental SC Engineering GA BA58T UT WOS:A1993BA58T00001 ER PT B AU BONANO, EJ AF BONANO, EJ BE Avogadro, A Ragaini, RC TI DECISION-MAKING, RISK ASSESSMENT, AND UNCERTAINTY ANALYSIS IN ENVIRONMENTAL-MANAGEMENT SO TECHNOLOGIES FOR ENVIRONMENTAL CLEANUP: SOIL AND GROUNDWATER SE EUROCOURSES-ENVIRONMENTAL MANAGEMENT LA English DT Proceedings Paper CT Eurocourse on Technologies for Environmental Cleanup: Soil and Groundwater CY SEP 21-25, 1992 CL JOINT RES CTR, ISPRA, ITALY SP COMMISS EUROPEAN COMMUNITIES ISPRA, JOINT RES CTR, LAWRENCE LIVERMORE NATL LAB, US DOE HO JOINT RES CTR C1 SANDIA NATL LABS,ENERGY PROGRAM,DEPT PROGRAM DEV 6907,ALBUQUERQUE,NM 87185. NR 0 TC 4 Z9 4 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2145-6 J9 EURO ENVIRONM MANAG PY 1993 VL 1 BP 13 EP 46 PG 34 WC Engineering, Environmental SC Engineering GA BA58T UT WOS:A1993BA58T00002 ER PT B AU HOFFMAN, F AF HOFFMAN, F BE Avogadro, A Ragaini, RC TI CHARACTERIZATION OF GROUND-WATER CONTAMINATION AT THE LLNL MAIN SITE - A CASE-STUDY SO TECHNOLOGIES FOR ENVIRONMENTAL CLEANUP: SOIL AND GROUNDWATER SE EUROCOURSES-ENVIRONMENTAL MANAGEMENT LA English DT Proceedings Paper CT Eurocourse on Technologies for Environmental Cleanup: Soil and Groundwater CY SEP 21-25, 1992 CL JOINT RES CTR, ISPRA, ITALY SP COMMISS EUROPEAN COMMUNITIES ISPRA, JOINT RES CTR, LAWRENCE LIVERMORE NATL LAB, US DOE HO JOINT RES CTR C1 LAWRENCE LIVERMORE NATL LAB,DEPT ENVIRONM PROTECT,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2145-6 J9 EURO ENVIRONM MANAG PY 1993 VL 1 BP 115 EP 133 PG 19 WC Engineering, Environmental SC Engineering GA BA58T UT WOS:A1993BA58T00005 ER PT B AU HOFFMAN, F AF HOFFMAN, F BE Avogadro, A Ragaini, RC TI INNOVATIVE CHARACTERIZATION TECHNIQUES AND DECISION-SUPPORT SYSTEMS FOR GROUND-WATER CONTAMINATION PROJECTS SO TECHNOLOGIES FOR ENVIRONMENTAL CLEANUP: SOIL AND GROUNDWATER SE EUROCOURSES-ENVIRONMENTAL MANAGEMENT LA English DT Proceedings Paper CT Eurocourse on Technologies for Environmental Cleanup: Soil and Groundwater CY SEP 21-25, 1992 CL JOINT RES CTR, ISPRA, ITALY SP COMMISS EUROPEAN COMMUNITIES ISPRA, JOINT RES CTR, LAWRENCE LIVERMORE NATL LAB, US DOE HO JOINT RES CTR C1 LAWRENCE LIVERMORE NATL LAB,DEPT ENVIRONM PROTECT,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2145-6 J9 EURO ENVIRONM MANAG PY 1993 VL 1 BP 339 EP 352 PG 14 WC Engineering, Environmental SC Engineering GA BA58T UT WOS:A1993BA58T00012 ER PT B AU YOW, JL AF YOW, JL BE Avogadro, A Ragaini, RC TI INNOVATIVE TECHNOLOGIES FOR SOIL CLEANUP SO TECHNOLOGIES FOR ENVIRONMENTAL CLEANUP: SOIL AND GROUNDWATER SE EUROCOURSES-ENVIRONMENTAL MANAGEMENT LA English DT Proceedings Paper CT Eurocourse on Technologies for Environmental Cleanup: Soil and Groundwater CY SEP 21-25, 1992 CL JOINT RES CTR, ISPRA, ITALY SP COMMISS EUROPEAN COMMUNITIES ISPRA, JOINT RES CTR, LAWRENCE LIVERMORE NATL LAB, US DOE HO JOINT RES CTR C1 LAWRENCE LIVERMORE NATL LAB,ENVIRONM RESTORAT,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2145-6 J9 EURO ENVIRONM MANAG PY 1993 VL 1 BP 353 EP 368 PG 16 WC Engineering, Environmental SC Engineering GA BA58T UT WOS:A1993BA58T00013 ER PT B AU YOW, JL AF YOW, JL BE Avogadro, A Ragaini, RC TI INNOVATIVE TECHNOLOGIES FOR GROUNDWATER CLEANUP SO TECHNOLOGIES FOR ENVIRONMENTAL CLEANUP: SOIL AND GROUNDWATER SE EUROCOURSES-ENVIRONMENTAL MANAGEMENT LA English DT Proceedings Paper CT Eurocourse on Technologies for Environmental Cleanup: Soil and Groundwater CY SEP 21-25, 1992 CL JOINT RES CTR, ISPRA, ITALY SP COMMISS EUROPEAN COMMUNITIES ISPRA, JOINT RES CTR, LAWRENCE LIVERMORE NATL LAB, US DOE HO JOINT RES CTR C1 LAWRENCE LIVERMORE NATL LAB,ENVIRONM RESTORAT PROGRAM,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2145-6 J9 EURO ENVIRONM MANAG PY 1993 VL 1 BP 369 EP 380 PG 12 WC Engineering, Environmental SC Engineering GA BA58T UT WOS:A1993BA58T00014 ER PT B AU HARRINGTON, MW HARLAN, CP AF HARRINGTON, MW HARLAN, CP BE Avogadro, A Ragaini, RC TI ENVIROTRADE - A TECHNICAL PERSPECTIVE ON THE DEVELOPMENT OF AN INFORMATION-SYSTEM PROVIDING DATA ON ENVIRONMENTAL TECHNOLOGIES AND NEEDS WORLDWIDE - SAND92-0637C SO TECHNOLOGIES FOR ENVIRONMENTAL CLEANUP: SOIL AND GROUNDWATER SE EUROCOURSES-ENVIRONMENTAL MANAGEMENT LA English DT Proceedings Paper CT Eurocourse on Technologies for Environmental Cleanup: Soil and Groundwater CY SEP 21-25, 1992 CL JOINT RES CTR, ISPRA, ITALY SP COMMISS EUROPEAN COMMUNITIES ISPRA, JOINT RES CTR, LAWRENCE LIVERMORE NATL LAB, US DOE HO JOINT RES CTR C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2145-6 J9 EURO ENVIRONM MANAG PY 1993 VL 1 BP 381 EP 386 PG 6 WC Engineering, Environmental SC Engineering GA BA58T UT WOS:A1993BA58T00015 ER PT B AU BONANO, EJ AF BONANO, EJ BE Avogadro, A Ragaini, RC TI THE FORMAL USE OF EXPERT JUDGMENTS IN ENVIRONMENTAL-MANAGEMENT SO TECHNOLOGIES FOR ENVIRONMENTAL CLEANUP: SOIL AND GROUNDWATER SE EUROCOURSES-ENVIRONMENTAL MANAGEMENT LA English DT Proceedings Paper CT Eurocourse on Technologies for Environmental Cleanup: Soil and Groundwater CY SEP 21-25, 1992 CL JOINT RES CTR, ISPRA, ITALY SP COMMISS EUROPEAN COMMUNITIES ISPRA, JOINT RES CTR, LAWRENCE LIVERMORE NATL LAB, US DOE HO JOINT RES CTR C1 SANDIA NATL LABS,ENERGY PROGRAM,DEPT PROGRAM DEV 6907,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2145-6 J9 EURO ENVIRONM MANAG PY 1993 VL 1 BP 409 EP 433 PG 25 WC Engineering, Environmental SC Engineering GA BA58T UT WOS:A1993BA58T00017 ER PT B AU HOFFMAN, F AF HOFFMAN, F BE Avogadro, A Ragaini, RC TI A STRATEGY FOR IMPROVING PUMP AND TREAT GROUND-WATER REMEDIATION SO TECHNOLOGIES FOR ENVIRONMENTAL CLEANUP: SOIL AND GROUNDWATER SE EUROCOURSES-ENVIRONMENTAL MANAGEMENT LA English DT Proceedings Paper CT Eurocourse on Technologies for Environmental Cleanup: Soil and Groundwater CY SEP 21-25, 1992 CL JOINT RES CTR, ISPRA, ITALY SP COMMISS EUROPEAN COMMUNITIES ISPRA, JOINT RES CTR, LAWRENCE LIVERMORE NATL LAB, US DOE HO JOINT RES CTR C1 LAWRENCE LIVERMORE NATL LAB,DEPT ENVIRONM PROTECT,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 0-7923-2145-6 J9 EURO ENVIRONM MANAG PY 1993 VL 1 BP 455 EP 466 PG 12 WC Engineering, Environmental SC Engineering GA BA58T UT WOS:A1993BA58T00019 ER PT J AU HACKER, BC AF HACKER, BC TI ENGINEERING A NEW ORDER - MILITARY INSTITUTIONS, TECHNICAL-EDUCATION, AND THE RISE OF THE INDUSTRIAL-STATE SO TECHNOLOGY AND CULTURE LA English DT Article ID ORGANIZATION; SCIENCE; DEFENSE; ARMY AB Gunpowder began the military revolution that molded the modern world. Relatively narrow technical changes in weapons and tactics on early modern European battlefields set in train the transformation of almost every aspect of Western civilization, argued Michael Roberts in 1956.1 Widely discussed and critically challenged, his version of the precise nature and timing of change on the equation's military side now commands only qualified respect.2 But the other side of the equation, Roberts's claim of great social consequences flowing from changing military technique, remains substantially intact. It retains enough plausibility, in fact, to suggest thinking about similar processes in other eras. RP HACKER, BC (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 375 TC 5 Z9 5 U1 2 U2 5 PU JOHNS HOPKINS UNIV PRESS PI BALTIMORE PA JOURNALS PUBLISHING DIVISION, 2715 NORTH CHARLES ST, BALTIMORE, MD 21218-4363 USA SN 0040-165X J9 TECHNOL CULT JI Technol. Cult. PD JAN PY 1993 VL 34 IS 1 BP 1 EP 27 DI 10.2307/3106453 PG 27 WC History & Philosophy Of Science SC History & Philosophy of Science GA KP961 UT WOS:A1993KP96100001 ER PT J AU BROWN, MA LIVESAY, HC LUX, DS WILSON, CR AF BROWN, MA LIVESAY, HC LUX, DS WILSON, CR TI DEMONSTRATIONS - THE MISSING LINK IN GOVERNMENT-SPONSORED ENERGY TECHNOLOGY DEPLOYMENT SO TECHNOLOGY IN SOCIETY LA English DT Article AB When effectively conducted, demonstrations constitute a powerful and often essential marketing step for new technologies. Seven case studies illustrate the value of demonstrations to the deployment of new energy technologies - particularly those being developed by independent inventors and small businesses. One key lesson is that successful demonstrations focus on fully qualified products. Premature prototypes, on the other hand, are more appropriate for field testing, where technical failures can be fixed without severely damaging future market prospects. A second lesson is that multiple and staged demonstrations may be necessary when industry and end-user markets are highly fragmented or when application environments are divergent. Public agencies can promote successful demonstrations in many ways: by finding suitable industrial partners and third-party monitors, by providing subventions that lower the risks and increase economic benefits to participants, and by compiling and disseminating accurate performance data. In addition, government agencies can play a constructive role by helping technology promoters understand the distinction between field tests and demonstrations, and by facilitating multiple demonstrations when necessary. C1 UNIV TENNESSEE,KNOXVILLE,TN 37996. TEXAS A&M UNIV SYST,COLL STN,TX 77843. BRYANT COLL,SMITHFIELD,RI 02917. RP BROWN, MA (reprint author), OAK RIDGE NATL LAB,ENERGY PROGRAM,PLANNING & EVALUAT GRP,OAK RIDGE,TN 37830, USA. NR 10 TC 21 Z9 21 U1 2 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0160-791X J9 TECHNOL SOC JI Technol. Soc. PY 1993 VL 15 IS 2 BP 185 EP 205 DI 10.1016/0160-791X(93)90002-6 PG 21 WC Social Issues; Social Sciences, Interdisciplinary SC Social Issues; Social Sciences - Other Topics GA KW880 UT WOS:A1993KW88000002 ER PT B AU NOVAK, JL FEDDEMA, JT MINER, NE STANSFIELD, SA AF NOVAK, JL FEDDEMA, JT MINER, NE STANSFIELD, SA BE Kim, WS TI COLLISION-AVOIDANCE DURING TELEOPERATION USING WHOLE-ARM PROXIMITY SENSORS COUPLED TO A VIRTUAL ENVIRONMENT SO TELEMANIPULATOR TECHNOLOGY AND SPACE TELEROBOTICS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 1993 SPIE Technical Conference on Telemanipulator Technology and Space Telerobotics CY SEP 07-09, 1993 CL BOSTON, MA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AUTOMATED IMAGING ASSOC, CARNEGIE MELLON UNIV, CTR EXCELLENCE OPT DATA PROC, UNIV CONNECTICUT, ADV TECHNOL CTR PRECIS MFG, INT SOC PHOTOGRAMMETRY & REMOTE SENSING C1 SANDIA NATL LABS,CTR INTELLIGENT SYST & ROBOT,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1322-4 J9 P SOC PHOTO-OPT INS PY 1993 VL 2057 BP 2 EP 9 DI 10.1117/12.164891 PG 8 WC Automation & Control Systems; Engineering, Aerospace; Optics SC Automation & Control Systems; Engineering; Optics GA BZ74F UT WOS:A1993BZ74F00001 ER PT B AU ANDERSON, RJ AF ANDERSON, RJ BE Kim, WS TI TELEOPERATION WITH VIRTUAL FORCE FEEDBACK SO TELEMANIPULATOR TECHNOLOGY AND SPACE TELEROBOTICS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 1993 SPIE Technical Conference on Telemanipulator Technology and Space Telerobotics CY SEP 07-09, 1993 CL BOSTON, MA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AUTOMATED IMAGING ASSOC, CARNEGIE MELLON UNIV, CTR EXCELLENCE OPT DATA PROC, UNIV CONNECTICUT, ADV TECHNOL CTR PRECIS MFG, INT SOC PHOTOGRAMMETRY & REMOTE SENSING C1 SANDIA NATL LABS,DIV INTELLIGENT MACHINE SYST 1,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1322-4 J9 P SOC PHOTO-OPT INS PY 1993 VL 2057 BP 32 EP 39 DI 10.1117/12.164927 PG 8 WC Automation & Control Systems; Engineering, Aerospace; Optics SC Automation & Control Systems; Engineering; Optics GA BZ74F UT WOS:A1993BZ74F00004 ER PT B AU WILHELMSEN, K STRENN, S AF WILHELMSEN, K STRENN, S BE Kim, WS TI TELEROBOTICS WITH WHOLE-ARM COLLISION-AVOIDANCE SO TELEMANIPULATOR TECHNOLOGY AND SPACE TELEROBOTICS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 1993 SPIE Technical Conference on Telemanipulator Technology and Space Telerobotics CY SEP 07-09, 1993 CL BOSTON, MA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AUTOMATED IMAGING ASSOC, CARNEGIE MELLON UNIV, CTR EXCELLENCE OPT DATA PROC, UNIV CONNECTICUT, ADV TECHNOL CTR PRECIS MFG, INT SOC PHOTOGRAMMETRY & REMOTE SENSING C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1322-4 J9 P SOC PHOTO-OPT INS PY 1993 VL 2057 BP 150 EP 161 DI 10.1117/12.164897 PG 12 WC Automation & Control Systems; Engineering, Aerospace; Optics SC Automation & Control Systems; Engineering; Optics GA BZ74F UT WOS:A1993BZ74F00014 ER PT B AU DRAPER, JV AF DRAPER, JV BE Kim, WS TI HUMAN-FACTORS IN TELEMANIPULATION - PERSPECTIVES FROM THE OAK-RIDGE-NATIONAL-LABORATORY EXPERIENCE SO TELEMANIPULATOR TECHNOLOGY AND SPACE TELEROBOTICS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 1993 SPIE Technical Conference on Telemanipulator Technology and Space Telerobotics CY SEP 07-09, 1993 CL BOSTON, MA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AUTOMATED IMAGING ASSOC, CARNEGIE MELLON UNIV, CTR EXCELLENCE OPT DATA PROC, UNIV CONNECTICUT, ADV TECHNOL CTR PRECIS MFG, INT SOC PHOTOGRAMMETRY & REMOTE SENSING C1 OAK RIDGE NATL LAB,DIV ROBOT & PROC SYST,OAK RIDGE,TN 37831. NR 0 TC 4 Z9 4 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1322-4 J9 P SOC PHOTO-OPT INS PY 1993 VL 2057 BP 162 EP 174 DI 10.1117/12.164898 PG 13 WC Automation & Control Systems; Engineering, Aerospace; Optics SC Automation & Control Systems; Engineering; Optics GA BZ74F UT WOS:A1993BZ74F00015 ER PT B AU DAVIES, BR AF DAVIES, BR BE Kim, WS TI REMEDIATING HAZARDOUS-WASTE ROBOTICALLY USING A HIGH-LEVEL CONTROL-SYSTEM AND REAL-TIME SENSORS SO TELEMANIPULATOR TECHNOLOGY AND SPACE TELEROBOTICS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 1993 SPIE Technical Conference on Telemanipulator Technology and Space Telerobotics CY SEP 07-09, 1993 CL BOSTON, MA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AUTOMATED IMAGING ASSOC, CARNEGIE MELLON UNIV, CTR EXCELLENCE OPT DATA PROC, UNIV CONNECTICUT, ADV TECHNOL CTR PRECIS MFG, INT SOC PHOTOGRAMMETRY & REMOTE SENSING C1 SANDIA NATL LABS,ADV MANIPULAT CONTROLS LAB,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1322-4 J9 P SOC PHOTO-OPT INS PY 1993 VL 2057 BP 258 EP 271 DI 10.1117/12.164907 PG 14 WC Automation & Control Systems; Engineering, Aerospace; Optics SC Automation & Control Systems; Engineering; Optics GA BZ74F UT WOS:A1993BZ74F00024 ER PT B AU DRAPER, JV HANDEL, S AF DRAPER, JV HANDEL, S BE Kim, WS TI PERIODIC COMPONENTS OF HAND ACCELERATION/DECELERATION IMPULSES DURING TELEMANIPULATION SO TELEMANIPULATOR TECHNOLOGY AND SPACE TELEROBOTICS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 1993 SPIE Technical Conference on Telemanipulator Technology and Space Telerobotics CY SEP 07-09, 1993 CL BOSTON, MA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AUTOMATED IMAGING ASSOC, CARNEGIE MELLON UNIV, CTR EXCELLENCE OPT DATA PROC, UNIV CONNECTICUT, ADV TECHNOL CTR PRECIS MFG, INT SOC PHOTOGRAMMETRY & REMOTE SENSING C1 OAK RIDGE NATL LAB,DIV ROBOT & PROC SYST,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1322-4 J9 P SOC PHOTO-OPT INS PY 1993 VL 2057 BP 317 EP 324 DI 10.1117/12.164914 PG 8 WC Automation & Control Systems; Engineering, Aerospace; Optics SC Automation & Control Systems; Engineering; Optics GA BZ74F UT WOS:A1993BZ74F00029 ER PT S AU QUINN, HR AF QUINN, HR BE Akerlof, CW Srednicki, MA TI TOPICS IN CP VIOLATION SO TEXAS/PASCOS 92 : RELATIVISTIC ASTROPHYSICS AND PARTICLE COSMOLOGY SE ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Proceedings Paper CT 16TH TEXAS SYMP ON RELATIVISTIC ASTROPHYSICS / 3RD INTERNATIONAL SYMP ON PARTICLES, STRINGS, AND COSMOLOGY CY DEC 13-18, 1992 CL BERKELEY, CA SP NEW YORK ACAD SCI, CTR PARTICLE ASTROPHYS, US DOE, PERMILAB, LAWRENCE BERKELEY LAB, LAWRENCE LIVERMORE NATL LAB, NASA, NATL SCI FDN, SSC, STANFORD LINEAR ACCELERATOR RP QUINN, HR (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA NEW YORK SN 0077-8923 BN 0-89766-805-7 J9 ANN NY ACAD SCI JI Ann.NY Acad.Sci. PY 1993 VL 688 BP 11 EP 18 DI 10.1111/j.1749-6632.1993.tb43883.x PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BY69T UT WOS:A1993BY69T00003 PM 26469408 ER PT S AU BOWLES, TJ AF BOWLES, TJ BE Akerlof, CW Srednicki, MA TI NEUTRINO MASS SO TEXAS/PASCOS 92 : RELATIVISTIC ASTROPHYSICS AND PARTICLE COSMOLOGY SE ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Proceedings Paper CT 16TH TEXAS SYMP ON RELATIVISTIC ASTROPHYSICS / 3RD INTERNATIONAL SYMP ON PARTICLES, STRINGS, AND COSMOLOGY CY DEC 13-18, 1992 CL BERKELEY, CA SP NEW YORK ACAD SCI, CTR PARTICLE ASTROPHYS, US DOE, PERMILAB, LAWRENCE BERKELEY LAB, LAWRENCE LIVERMORE NATL LAB, NASA, NATL SCI FDN, SSC, STANFORD LINEAR ACCELERATOR RP BOWLES, TJ (reprint author), LOS ALAMOS NATL LAB,DIV PHYS,LOS ALAMOS,NM 87545, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA NEW YORK SN 0077-8923 BN 0-89766-805-7 J9 ANN NY ACAD SCI JI Ann.NY Acad.Sci. PY 1993 VL 688 BP 74 EP 83 DI 10.1111/j.1749-6632.1993.tb43887.x PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BY69T UT WOS:A1993BY69T00007 PM 26469412 ER PT S AU PERLMUTTER, S PENNYPACKER, C GOLDHABER, G GOOBAR, A MULLER, R DESAI, J KIM, A KIM, M NEWBERG, H SMALL, I BOYLE, B CRAWFORD, C MCMAHON, R BUNCLARK, P CARTER, D IRWIN, M TERLEVICH, R ELLIS, R GLAZEBROOK, K COUCH, W MOULD, J SMALL, T ABRAHAM, R AF PERLMUTTER, S PENNYPACKER, C GOLDHABER, G GOOBAR, A MULLER, R DESAI, J KIM, A KIM, M NEWBERG, H SMALL, I BOYLE, B CRAWFORD, C MCMAHON, R BUNCLARK, P CARTER, D IRWIN, M TERLEVICH, R ELLIS, R GLAZEBROOK, K COUCH, W MOULD, J SMALL, T ABRAHAM, R BE Akerlof, CW Srednicki, MA TI A SUPERNOVA AT Z = 0.458 AND COSMOLOGY SO TEXAS/PASCOS 92 : RELATIVISTIC ASTROPHYSICS AND PARTICLE COSMOLOGY SE ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Proceedings Paper CT 16TH TEXAS SYMP ON RELATIVISTIC ASTROPHYSICS / 3RD INTERNATIONAL SYMP ON PARTICLES, STRINGS, AND COSMOLOGY CY DEC 13-18, 1992 CL BERKELEY, CA SP NEW YORK ACAD SCI, CTR PARTICLE ASTROPHYS, US DOE, PERMILAB, LAWRENCE BERKELEY LAB, LAWRENCE LIVERMORE NATL LAB, NASA, NATL SCI FDN, SSC, STANFORD LINEAR ACCELERATOR RP PERLMUTTER, S (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Perlmutter, Saul/I-3505-2015 OI Perlmutter, Saul/0000-0002-4436-4661 NR 0 TC 0 Z9 0 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA NEW YORK SN 0077-8923 BN 0-89766-805-7 J9 ANN NY ACAD SCI JI Ann.NY Acad.Sci. PY 1993 VL 688 BP 554 EP 557 DI 10.1111/j.1749-6632.1993.tb43936.x PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BY69T UT WOS:A1993BY69T00056 PM 26469461 ER PT S AU EPSTEIN, RI FENIMORE, EE LEONARD, PJT LINK, B AF EPSTEIN, RI FENIMORE, EE LEONARD, PJT LINK, B BE Akerlof, CW Srednicki, MA TI GAMMA-RAY BURSTS IN ACTIVE GALACTIC NUCLEI SO TEXAS/PASCOS 92 : RELATIVISTIC ASTROPHYSICS AND PARTICLE COSMOLOGY SE ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Proceedings Paper CT 16TH TEXAS SYMP ON RELATIVISTIC ASTROPHYSICS / 3RD INTERNATIONAL SYMP ON PARTICLES, STRINGS, AND COSMOLOGY CY DEC 13-18, 1992 CL BERKELEY, CA SP NEW YORK ACAD SCI, CTR PARTICLE ASTROPHYS, US DOE, PERMILAB, LAWRENCE BERKELEY LAB, LAWRENCE LIVERMORE NATL LAB, NASA, NATL SCI FDN, SSC, STANFORD LINEAR ACCELERATOR RP EPSTEIN, RI (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA NEW YORK SN 0077-8923 BN 0-89766-805-7 J9 ANN NY ACAD SCI JI Ann.NY Acad.Sci. PY 1993 VL 688 BP 565 EP 572 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BY69T UT WOS:A1993BY69T00058 ER PT S AU BENNETT, DP AKERLOF, C ALCOCK, C ALLSMAN, R AXELROD, T COOK, KH FREEMAN, K GRIEST, K MARSHALL, S PARK, HS PERLMUTTER, S PETERSON, B QUINN, P RODGERS, A STUBBS, CW SUTHERLAND, W AF BENNETT, DP AKERLOF, C ALCOCK, C ALLSMAN, R AXELROD, T COOK, KH FREEMAN, K GRIEST, K MARSHALL, S PARK, HS PERLMUTTER, S PETERSON, B QUINN, P RODGERS, A STUBBS, CW SUTHERLAND, W BE Akerlof, CW Srednicki, MA TI THE 1ST DATA FROM THE MACHO EXPERIMENT SO TEXAS/PASCOS 92 : RELATIVISTIC ASTROPHYSICS AND PARTICLE COSMOLOGY SE ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Proceedings Paper CT 16TH TEXAS SYMP ON RELATIVISTIC ASTROPHYSICS / 3RD INTERNATIONAL SYMP ON PARTICLES, STRINGS, AND COSMOLOGY CY DEC 13-18, 1992 CL BERKELEY, CA SP NEW YORK ACAD SCI, CTR PARTICLE ASTROPHYS, US DOE, PERMILAB, LAWRENCE BERKELEY LAB, LAWRENCE LIVERMORE NATL LAB, NASA, NATL SCI FDN, SSC, STANFORD LINEAR ACCELERATOR RP BENNETT, DP (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. RI Perlmutter, Saul/I-3505-2015 OI Perlmutter, Saul/0000-0002-4436-4661 NR 0 TC 7 Z9 7 U1 0 U2 2 PU NEW YORK ACAD SCIENCES PI NEW YORK PA NEW YORK SN 0077-8923 BN 0-89766-805-7 J9 ANN NY ACAD SCI JI Ann.NY Acad.Sci. PY 1993 VL 688 BP 612 EP 618 DI 10.1111/j.1749-6632.1993.tb43945.x PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BY69T UT WOS:A1993BY69T00065 PM 26469470 ER PT S AU STEBBINS, A AF STEBBINS, A BE Akerlof, CW Srednicki, MA TI ON THE MEANING OF DELTA-T/T SO TEXAS/PASCOS 92 : RELATIVISTIC ASTROPHYSICS AND PARTICLE COSMOLOGY SE ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Proceedings Paper CT 16TH TEXAS SYMP ON RELATIVISTIC ASTROPHYSICS / 3RD INTERNATIONAL SYMP ON PARTICLES, STRINGS, AND COSMOLOGY CY DEC 13-18, 1992 CL BERKELEY, CA SP NEW YORK ACAD SCI, CTR PARTICLE ASTROPHYS, US DOE, PERMILAB, LAWRENCE BERKELEY LAB, LAWRENCE LIVERMORE NATL LAB, NASA, NATL SCI FDN, SSC, STANFORD LINEAR ACCELERATOR RP STEBBINS, A (reprint author), NASA,FERMILAB ASTROPHYS CTR,FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA NEW YORK SN 0077-8923 BN 0-89766-805-7 J9 ANN NY ACAD SCI JI Ann.NY Acad.Sci. PY 1993 VL 688 BP 824 EP 826 DI 10.1111/j.1749-6632.1993.tb43982.x PG 3 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BY69T UT WOS:A1993BY69T00102 PM 26469507 ER PT J AU HARRISON, R BAIR, R AF HARRISON, R BAIR, R TI INTRODUCTION - PARALLEL COMPUTING IN CHEMICAL PHYSICS SO THEORETICA CHIMICA ACTA LA English DT Editorial Material C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP HARRISON, R (reprint author), ARGONNE NATL LAB, ARGONNE, IL 60439 USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0040-5744 J9 THEOR CHIM ACTA JI Theor. Chim. Acta PD JAN PY 1993 VL 84 IS 4-5 BP 255 EP 256 DI 10.1007/BF01113265 PG 2 WC Chemistry, Physical SC Chemistry GA KJ022 UT WOS:A1993KJ02200001 ER PT J AU FEYEREISEN, M KENDALL, RA AF FEYEREISEN, M KENDALL, RA TI AN EFFICIENT IMPLEMENTATION OF THE DIRECT-SCF ALGORITHM ON PARALLEL COMPUTER ARCHITECTURES SO THEORETICA CHIMICA ACTA LA English DT Article; Proceedings Paper CT WORKSHOP ON PARALLEL COMPUTING IN CHEMICAL PHYSICS CY JUL 17-19, 1991 CL ARGONNE NATL LAB, ARGONNE, IL SP ARGONNE NATL LAB, PHYS RES THEORY INST DICTIONARY FUND, BATTLE PACIFIC NW LABS HO ARGONNE NATL LAB DE DIRECT-SCF ALGORITHM; DISCO AB The development and implementation of a parallel direct self consistent field (SCF) Hartree-Fock algorithm, with gradients and random phase approximation solutions is presented. Important details of the structure of the parallel version of DISCO and preliminary results for calculations using the Concurrent Supercomputing Consortium Intel Touchstone Delta parallel computer system are reported. The data show that the algorithms are efficiently parallelized and that throughput of a one processor CRAY X-MP is reached with about 16 nodes on the Delta. The data also indicate sequential code which was not a bottleneck on traditional supercomputers, can become time critical on parallel computers. C1 PACIFIC NW LAB, MOLEC SCI RES CTR, THEORY MODELING & SIMULAT PROGRAM, RICHLAND, WA 99352 USA. NR 12 TC 32 Z9 32 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0040-5744 J9 THEOR CHIM ACTA JI Theor. Chim. Acta PD JAN PY 1993 VL 84 IS 4-5 BP 289 EP 299 DI 10.1007/BF01113268 PG 11 WC Chemistry, Physical SC Chemistry GA KJ022 UT WOS:A1993KJ02200004 ER PT J AU COLVIN, ME JANSSEN, CL WHITESIDE, RA TONG, CH AF COLVIN, ME JANSSEN, CL WHITESIDE, RA TONG, CH TI PARALLEL DIRECT SCF FOR LARGE-SCALE CALCULATIONS SO THEORETICA CHIMICA ACTA LA English DT Article; Proceedings Paper CT WORKSHOP ON PARALLEL COMPUTING IN CHEMICAL PHYSICS CY JUL 17-19, 1991 CL ARGONNE NATL LAB, ARGONNE, IL SP ARGONNE NATL LAB, PHYS RES THEORY INST DICTIONARY FUND, BATTLE PACIFIC NW LABS HO ARGONNE NATL LAB DE PARALLEL DIRECT SCF; QUANTUM CHEMISTRY; MPSCF; LAN AB Quantum chemistry has become an essential tool in many areas of chemical research; however, quantum chemistry is not yet playing a role in many exciting new chemical disciplines, such as medicinal chemistry and materials science, where the size of the chemical systems has been too large to study using ab initio chemical methods. The development of massively parallel supercomputers offers the potential to predict properties relevant to a variety of problems in these burgeoning new fields. The goal of this project is to develop a set of parallelized ''production codes'' for initially a relatively limited set of methods. As a key part of this project we are experimenting with the use of modern programming languages and methodologies to make these programs both portable and reusable. This paper describes the development of a massively parallel direct SCF program, MPSCF. For systems over a few hundred basic functions, MPSCF running on 256 nCUBE processors performs nearly as well as Gaussian 90 running on a single processor Cray Y-MP. On the next generation of parallel computers, such as the Intel Touchstone Delta, MPSCF should allow the SCF calculations on chemical systems too large for vector supercomputers. RP COLVIN, ME (reprint author), SANDIA NATL LABS,CTR COMPUTAT ENGN,LIVERMORE,CA 94551, USA. NR 16 TC 56 Z9 56 U1 1 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0040-5744 J9 THEOR CHIM ACTA JI Theor. Chim. Acta PD JAN PY 1993 VL 84 IS 4-5 BP 301 EP 314 DI 10.1007/BF01113269 PG 14 WC Chemistry, Physical SC Chemistry GA KJ022 UT WOS:A1993KJ02200005 ER PT J AU BELAK, J AF BELAK, J TI HARNESSING THE KILLER MICROS - APPLICATIONS FROM LLNLS MASSIVELY PARALLEL COMPUTING INITIATIVE SO THEORETICA CHIMICA ACTA LA English DT Article; Proceedings Paper CT WORKSHOP ON PARALLEL COMPUTING IN CHEMICAL PHYSICS CY JUL 17-19, 1991 CL ARGONNE NATL LAB, ARGONNE, IL SP ARGONNE NATL LAB, PHYS RES THEORY INST DICTIONARY FUND, BATTLE PACIFIC NW LABS HO ARGONNE NATL LAB DE KILLER MICROS; MPCI; VECTOR APPLICATIONS AB Recent developments in microprocessor technology have led to performance on scalar applications exceeding traditional supercomputers. This suggests that coupling hundreds or even thousands of these ''killer-micros'' (all working on a single physical problem) may lead to performance on vector applications in excess of vector supercomputers. Also, future generation killer-micros are expected to have vector floating point units as well. The purpose of this paper is to present an overview of the parallel computing environment at Lawrence Liver-more National Laboratory. However, the perspective is necessarily quite narrow and most of the examples are taken from the author's implementation of a large-scale molecular dynamics code on the BBN-TC2000 at LLNL. Parallelism is achieved through a geometric domain decomposition - each processor is assigned a distinct region of space and all atoms contained therein. As the atomic positions evolve, the processors must exchange ownership of specific atoms. This geometric domain decomposition proves to be quite general and we highlight its application to image processing and hydrodynamics simulations as well. RP BELAK, J (reprint author), LAWRENCE LIVERMORE NATL LAB,MASS PARALLEL COMP INITIAT,LIVERMORE,CA 94550, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0040-5744 J9 THEOR CHIM ACTA JI Theor. Chim. Acta PD JAN PY 1993 VL 84 IS 4-5 BP 315 EP 323 DI 10.1007/BF01113270 PG 9 WC Chemistry, Physical SC Chemistry GA KJ022 UT WOS:A1993KJ02200006 ER PT J AU SHEPARD, R AF SHEPARD, R TI ELIMINATION OF THE DIAGONALIZATION BOTTLENECK IN PARALLEL DIRECT-SCF METHODS SO THEORETICA CHIMICA ACTA LA English DT Article; Proceedings Paper CT WORKSHOP ON PARALLEL COMPUTING IN CHEMICAL PHYSICS CY JUL 17-19, 1991 CL ARGONNE NATL LAB, ARGONNE, IL SP ARGONNE NATL LAB, PHYS RES THEORY INST DICTIONARY FUND, BATTLE PACIFIC NW LABS HO ARGONNE NATL LAB DE DIAGONALIZATION; BOTTLENECK; PARALLEL; DIRECT-SCF; 2ND-ORDER CONVERGENCE AB It is shown that the matrix diagonalization bottleneck associated with the sequential O(N(BFN)3) diagonalization of the fock matrix within each iteration of the Direct-SCF procedure may be eliminated, and replaced instead with a combination of parallel O(N(BFN)<4) and sequential O(N(Sub)3) steps. For large basis sets, the relation N(Sub) much less than N(BFN) between the dimension of the expansion subspace and the number of basis functions leads to a method of wave-function optimization in which the sequential bottleneck is eliminated. As a side benefit, the second-order iterative procedure on which this method is based displays superior convergence properties, and provides greater insight into the behavior of the energy with respect to orbital variations, than the traditional first-order, fixed-point, iterative approaches. The implementation of this method may be incorporated into essentially any existing Direct-SCF program with only minimal, and localized, changes. RP SHEPARD, R (reprint author), ARGONNE NATL LAB, DIV CHEM, THEORET CHEM GRP, ARGONNE, IL 60439 USA. NR 12 TC 25 Z9 25 U1 0 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0040-5744 J9 THEOR CHIM ACTA JI Theor. Chim. Acta PD JAN PY 1993 VL 84 IS 4-5 BP 343 EP 351 DI 10.1007/BF01113273 PG 9 WC Chemistry, Physical SC Chemistry GA KJ022 UT WOS:A1993KJ02200009 ER PT J AU HARRISON, RJ AF HARRISON, RJ TI MOVING BEYOND MESSAGE PASSING - EXPERIMENTS WITH A DISTRIBUTED-DATA MODEL SO THEORETICA CHIMICA ACTA LA English DT Article; Proceedings Paper CT WORKSHOP ON PARALLEL COMPUTING IN CHEMICAL PHYSICS CY JUL 17-19, 1991 CL ARGONNE NATL LAB, ARGONNE, IL SP ARGONNE NATL LAB, PHYS RES THEORY INST DICTIONARY FUND, BATTLE PACIFIC NW LABS HO ARGONNE NATL LAB DE DISTRIBUTED-DATA MODEL; MESSAGE PASSING ID PARALLEL COMPUTATION AB A message-passing model provides a natural and efficient parallel implementation for many applications in chemical physics on MIMD machines. However, although the distinction between local and non-local memory is at the very heart of writing efficient parallel programs, message passing leaves all responsibility for data management to the applications. This has significant, detrimental implications for both ease of programming and efficient use of shared and distributed resources. Examined here is a simple model which increments message passing with Linda-like tools for the manipulation of distributed-data structures. This is applied to common algorithms in chemical physics. RP HARRISON, RJ (reprint author), ARGONNE NATL LAB,DIV CHEM,THEORET CHEM GRP,ARGONNE,IL 60439, USA. NR 26 TC 12 Z9 12 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0040-5744 J9 THEOR CHIM ACTA JI Theor. Chim. Acta PD JAN PY 1993 VL 84 IS 4-5 BP 363 EP 375 DI 10.1007/BF01113275 PG 13 WC Chemistry, Physical SC Chemistry GA KJ022 UT WOS:A1993KJ02200011 ER PT J AU LUSK, E AF LUSK, E TI PERFORMANCE VISUALIZATION FOR PARALLEL PROGRAMS SO THEORETICA CHIMICA ACTA LA English DT Article; Proceedings Paper CT WORKSHOP ON PARALLEL COMPUTING IN CHEMICAL PHYSICS CY JUL 17-19, 1991 CL ARGONNE NATL LAB, ARGONNE, IL SP ARGONNE NATL LAB, PHYS RES THEORY INST DICTIONARY FUND, BATTLE PACIFIC NW LABS HO ARGONNE NATL LAB DE PARALLEL PROGRAMS; GRAPHICAL PERFORMANCE VISUALIZATION AB We describe here a set of graphical performance visualization tools that have been developed at Argonne National Laboratory for increasing one's understanding of the behavior of parallel programs. RP LUSK, E (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 8 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0040-5744 J9 THEOR CHIM ACTA JI Theor. Chim. Acta PD JAN PY 1993 VL 84 IS 4-5 BP 377 EP 384 DI 10.1007/BF01113276 PG 8 WC Chemistry, Physical SC Chemistry GA KJ022 UT WOS:A1993KJ02200012 ER PT J AU LITTLEFIELD, RJ MASCHHOFF, KJ AF LITTLEFIELD, RJ MASCHHOFF, KJ TI INVESTIGATING THE PERFORMANCE OF PARALLEL EIGENSOLVERS FOR LARGE PROCESSOR COUNTS SO THEORETICA CHIMICA ACTA LA English DT Article; Proceedings Paper CT WORKSHOP ON PARALLEL COMPUTING IN CHEMICAL PHYSICS CY JUL 17-19, 1991 CL ARGONNE NATL LAB, ARGONNE, IL SP ARGONNE NATL LAB, PHYS RES THEORY INST DICTIONARY FUND, BATTLE PACIFIC NW LABS HO ARGONNE NATL LAB DE EIGENSOLVING; MASSIVELY PARALLEL COMPUTERS; SMALL DENSE MATRICES AB Eigensolving (diagonalizing) small dense matrices threatens to become a bottleneck in the application of massively parallel computers to electronic structure methods. Because the computational cost of electronic structure methods typically scales as O(N3) or worse, even teraflop computer systems with thousands of processors will often confront problems with N much less than 10,000. At present, diagonalizing an N x N matrix on P processors is not efficient when P is large compared to N. The loss of efficiency can make diagonalization a bottleneck on a massively parallel computer, even though it is typically a minor operation on conventional serial machines. This situation motivates a search for both improved methods and identification of the computer characteristics that would be most productive to improve. In this paper, we compare the performance of several parallel and serial methods for solving dense real symmetric eigensystems on a distributed memory message passing parallel computer. We focus on matrices of size N = 200 and processor counts P = 1 to P = 512, with execution on the Intel Touchstone DELTA computer. The best eigensolver method is found to depend on the number of available processors. Of the methods tested, a recently developed Blocked Factored Jacobi (BFJ) method is the slowest for small P, but the fastest for large P. Its speed is a complicated non-monotonic function of the number of processors used. A detailed performance analysis of the BFJ method shows that: (1) the factor most responsible for limited speedup is communication startup cost; (2) with current communication costs, the maximum achievable parallel speedup is modest (one order of magnitude) compared to the best serial method; and (3) the fastest solution is often achieved by using less than the maximum number of available processors. C1 UNIV WASHINGTON, SEATTLE, WA 98195 USA. RP LITTLEFIELD, RJ (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 10 TC 12 Z9 12 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0040-5744 J9 THEOR CHIM ACTA JI Theor. Chim. Acta PD JAN PY 1993 VL 84 IS 4-5 BP 457 EP 473 DI 10.1007/BF01113282 PG 17 WC Chemistry, Physical SC Chemistry GA KJ022 UT WOS:A1993KJ02200018 ER PT B AU SWANK, WD FINCKE, JR HAGGARD, DC AF SWANK, WD FINCKE, JR HAGGARD, DC BE Berndt, CC Bernecki, TF TI PLASMA PARTICLE INTERACTION IN SUBSONIC ARGON HELIUM THERMAL PLASMA JETS SO THERMAL SPRAY COATINGS: RESEARCH, DESIGN AND APPLICATIONS LA English DT Proceedings Paper CT 5th National Thermal Spray Conference and Exposition on Thermal Spray Technology: Growing to Serve Industry in Surface Protection and Materials Processing (NTSC 93) CY JUN 07-11, 1993 CL ANAHEIM, CA SP ASM INT, AMER WELDING SOC, DEUT VERBAND SCHWEISSTECH E V, JAPAN THERMAL SPRAYING SOC, HIGH TEMP SOC JAPAN, INT THERMAL SPRAY ASSOC C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID. NR 0 TC 7 Z9 7 U1 0 U2 0 PU ASM INTERNATIONAL PI MATERIALS PARK PA 9503 KINSMAN RD, MATERIALS PARK, OH 44073 BN 0-87170-470-6 PY 1993 BP 25 EP 30 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA BZ93M UT WOS:A1993BZ93M00005 ER PT B AU STEEPER, TJ RIGGS, WL ROTOLICO, AJ NERZ, JE VARACALLE, DJ WILSON, GC AF STEEPER, TJ RIGGS, WL ROTOLICO, AJ NERZ, JE VARACALLE, DJ WILSON, GC BE Berndt, CC Bernecki, TF TI A TAGUCHI DESIGN OF EXPERIMENT STUDY OF PLASMA-SPRAYED ALUMINA COATINGS SO THERMAL SPRAY COATINGS: RESEARCH, DESIGN AND APPLICATIONS LA English DT Proceedings Paper CT 5th National Thermal Spray Conference and Exposition on Thermal Spray Technology: Growing to Serve Industry in Surface Protection and Materials Processing (NTSC 93) CY JUN 07-11, 1993 CL ANAHEIM, CA SP ASM INT, AMER WELDING SOC, DEUT VERBAND SCHWEISSTECH E V, JAPAN THERMAL SPRAYING SOC, HIGH TEMP SOC JAPAN, INT THERMAL SPRAY ASSOC C1 SAVANNAH RIVER ECOL LAB,AIKEN,SC 29801. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ASM INTERNATIONAL PI MATERIALS PARK PA 9503 KINSMAN RD, MATERIALS PARK, OH 44073 BN 0-87170-470-6 PY 1993 BP 31 EP 36 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA BZ93M UT WOS:A1993BZ93M00006 ER PT B AU STEEPER, TJ RIGGS, WL ROTOLICO, AJ NERZ, JE VARACALLE, DJ WILSON, GC ANDERSON, MJ WHITCOMB, PJ AF STEEPER, TJ RIGGS, WL ROTOLICO, AJ NERZ, JE VARACALLE, DJ WILSON, GC ANDERSON, MJ WHITCOMB, PJ BE Berndt, CC Bernecki, TF TI OPTIMIZING PLASMA-SPRAYED ALUMINA-TITANIA COATINGS USING STATISTICAL-METHODS SO THERMAL SPRAY COATINGS: RESEARCH, DESIGN AND APPLICATIONS LA English DT Proceedings Paper CT 5th National Thermal Spray Conference and Exposition on Thermal Spray Technology: Growing to Serve Industry in Surface Protection and Materials Processing (NTSC 93) CY JUN 07-11, 1993 CL ANAHEIM, CA SP ASM INT, AMER WELDING SOC, DEUT VERBAND SCHWEISSTECH E V, JAPAN THERMAL SPRAYING SOC, HIGH TEMP SOC JAPAN, INT THERMAL SPRAY ASSOC C1 SAVANNAH RIVER ECOL LAB,AIKEN,SC 29801. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ASM INTERNATIONAL PI MATERIALS PARK PA 9503 KINSMAN RD, MATERIALS PARK, OH 44073 BN 0-87170-470-6 PY 1993 BP 37 EP 48 PG 12 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA BZ93M UT WOS:A1993BZ93M00007 ER PT B AU FINCKE, JR SWANK, WD HAGGARD, DC AF FINCKE, JR SWANK, WD HAGGARD, DC BE Berndt, CC Bernecki, TF TI ENTRAINMENT AND DEMIXING IN SUBSONIC ARGON HELIUM THERMAL PLASMA JETS SO THERMAL SPRAY COATINGS: RESEARCH, DESIGN AND APPLICATIONS LA English DT Proceedings Paper CT 5th National Thermal Spray Conference and Exposition on Thermal Spray Technology: Growing to Serve Industry in Surface Protection and Materials Processing (NTSC 93) CY JUN 07-11, 1993 CL ANAHEIM, CA SP ASM INT, AMER WELDING SOC, DEUT VERBAND SCHWEISSTECH E V, JAPAN THERMAL SPRAYING SOC, HIGH TEMP SOC JAPAN, INT THERMAL SPRAY ASSOC C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ASM INTERNATIONAL PI MATERIALS PARK PA 9503 KINSMAN RD, MATERIALS PARK, OH 44073 BN 0-87170-470-6 PY 1993 BP 49 EP 54 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA BZ93M UT WOS:A1993BZ93M00008 ER PT B AU NEISER, RA DYKHUIZEN, RC SMITH, MF HOLLIS, KJ AF NEISER, RA DYKHUIZEN, RC SMITH, MF HOLLIS, KJ BE Berndt, CC Bernecki, TF TI USE OF A COMPUTER-MODEL TO ASSIST IN VPS PARAMETER DEVELOPMENT SO THERMAL SPRAY COATINGS: RESEARCH, DESIGN AND APPLICATIONS LA English DT Proceedings Paper CT 5th National Thermal Spray Conference and Exposition on Thermal Spray Technology: Growing to Serve Industry in Surface Protection and Materials Processing (NTSC 93) CY JUN 07-11, 1993 CL ANAHEIM, CA SP ASM INT, AMER WELDING SOC, DEUT VERBAND SCHWEISSTECH E V, JAPAN THERMAL SPRAYING SOC, HIGH TEMP SOC JAPAN, INT THERMAL SPRAY ASSOC C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 3 Z9 3 U1 0 U2 0 PU ASM INTERNATIONAL PI MATERIALS PARK PA 9503 KINSMAN RD, MATERIALS PARK, OH 44073 BN 0-87170-470-6 PY 1993 BP 61 EP 66 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA BZ93M UT WOS:A1993BZ93M00010 ER PT B AU MCHUGH, KM KEY, JF AF MCHUGH, KM KEY, JF BE Berndt, CC Bernecki, TF TI USE OF DE-LAVAL NOZZLES IN SPRAY FORMING SO THERMAL SPRAY COATINGS: RESEARCH, DESIGN AND APPLICATIONS LA English DT Proceedings Paper CT 5th National Thermal Spray Conference and Exposition on Thermal Spray Technology: Growing to Serve Industry in Surface Protection and Materials Processing (NTSC 93) CY JUN 07-11, 1993 CL ANAHEIM, CA SP ASM INT, AMER WELDING SOC, DEUT VERBAND SCHWEISSTECH E V, JAPAN THERMAL SPRAYING SOC, HIGH TEMP SOC JAPAN, INT THERMAL SPRAY ASSOC C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ASM INTERNATIONAL PI MATERIALS PARK PA 9503 KINSMAN RD, MATERIALS PARK, OH 44073 BN 0-87170-470-6 PY 1993 BP 75 EP 80 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA BZ93M UT WOS:A1993BZ93M00012 ER PT B AU EINERSON, CJ CLARK, DE DETERING, BA TAYLOR, PL AF EINERSON, CJ CLARK, DE DETERING, BA TAYLOR, PL BE Berndt, CC Bernecki, TF TI INTELLIGENT CONTROL STRATEGIES FOR THE PLASMA SPRAY PROCESS SO THERMAL SPRAY COATINGS: RESEARCH, DESIGN AND APPLICATIONS LA English DT Proceedings Paper CT 5th National Thermal Spray Conference and Exposition on Thermal Spray Technology: Growing to Serve Industry in Surface Protection and Materials Processing (NTSC 93) CY JUN 07-11, 1993 CL ANAHEIM, CA SP ASM INT, AMER WELDING SOC, DEUT VERBAND SCHWEISSTECH E V, JAPAN THERMAL SPRAYING SOC, HIGH TEMP SOC JAPAN, INT THERMAL SPRAY ASSOC C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID. NR 0 TC 8 Z9 9 U1 0 U2 1 PU ASM INTERNATIONAL PI MATERIALS PARK PA 9503 KINSMAN RD, MATERIALS PARK, OH 44073 BN 0-87170-470-6 PY 1993 BP 205 EP 211 PG 7 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA BZ93M UT WOS:A1993BZ93M00031 ER PT B AU NEISER, RA WATSON, RD SMOLIK, GR HOLLIS, KJ AF NEISER, RA WATSON, RD SMOLIK, GR HOLLIS, KJ BE Berndt, CC Bernecki, TF TI AN EVALUATION OF PLASMA-SPRAYED TUNGSTEN FOR FUSION-REACTORS SO THERMAL SPRAY COATINGS: RESEARCH, DESIGN AND APPLICATIONS LA English DT Proceedings Paper CT 5th National Thermal Spray Conference and Exposition on Thermal Spray Technology: Growing to Serve Industry in Surface Protection and Materials Processing (NTSC 93) CY JUN 07-11, 1993 CL ANAHEIM, CA SP ASM INT, AMER WELDING SOC, DEUT VERBAND SCHWEISSTECH E V, JAPAN THERMAL SPRAYING SOC, HIGH TEMP SOC JAPAN, INT THERMAL SPRAY ASSOC C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 2 Z9 2 U1 0 U2 2 PU ASM INTERNATIONAL PI MATERIALS PARK PA 9503 KINSMAN RD, MATERIALS PARK, OH 44073 BN 0-87170-470-6 PY 1993 BP 303 EP 308 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA BZ93M UT WOS:A1993BZ93M00045 ER PT B AU SORDELET, DJ ELLIS, TW AF SORDELET, DJ ELLIS, TW BE Berndt, CC Bernecki, TF TI EVALUATION OF PLASMA-ARC SPRAYED REFRACTORY-METAL CRUCIBLE COATINGS FOR CONTAINING MOLTEN CERAMIC OXIDES SO THERMAL SPRAY COATINGS: RESEARCH, DESIGN AND APPLICATIONS LA English DT Proceedings Paper CT 5th National Thermal Spray Conference and Exposition on Thermal Spray Technology: Growing to Serve Industry in Surface Protection and Materials Processing (NTSC 93) CY JUN 07-11, 1993 CL ANAHEIM, CA SP ASM INT, AMER WELDING SOC, DEUT VERBAND SCHWEISSTECH E V, JAPAN THERMAL SPRAYING SOC, HIGH TEMP SOC JAPAN, INT THERMAL SPRAY ASSOC C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASM INTERNATIONAL PI MATERIALS PARK PA 9503 KINSMAN RD, MATERIALS PARK, OH 44073 BN 0-87170-470-6 PY 1993 BP 643 EP 648 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films SC Materials Science GA BZ93M UT WOS:A1993BZ93M00100 ER PT S AU CHEN, Y LILIENTALWEBER, Z WASHBURN, J KLEM, JF TSAO, JY AF CHEN, Y LILIENTALWEBER, Z WASHBURN, J KLEM, JF TSAO, JY BE Townsend, PH Weihs, TP Sanchez, JE Borgesen, P TI REORIENTATION OF MISFIT DISLOCATIONS DURING ANNEALING IN INGAAS/GAAS(001) INTERFACES SO THIN FILMS: STRESSES AND MECHANICAL PROPERTIES IV SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Thin Films: Stresses and Mechanical Properties IV, at the 1993 Spring Meeting of the Materials-Research-Society CY APR 12-16, 1993 CL SAN FRANCISCO, CA SP MAT RES SOC, DOW CHEM CO, ADV MICRO DEVICES, LAWRENCE LIVERMORE NATL LAB, NANO INSTRUMENTS INC, QUAD GRP, TENCOR INSTRUMENTS, INDUSTRY CORNELL UNIV, ALLIANCE ELECTR PACKAGE C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-204-9 J9 MATER RES SOC SYMP P PY 1993 VL 308 BP 405 EP 410 DI 10.1557/PROC-308-405 PG 6 WC Materials Science, Multidisciplinary; Mechanics; Physics, Applied SC Materials Science; Mechanics; Physics GA BZ55E UT WOS:A1993BZ55E00059 ER PT S AU JERVIS, TR ZOCCO, TG HUBBARD, KM NASTASI, M AF JERVIS, TR ZOCCO, TG HUBBARD, KM NASTASI, M BE Townsend, PH Weihs, TP Sanchez, JE Borgesen, P TI MECHANICAL-PROPERTIES OF EXCIMER-LASER MODIFIED TITANIUM SURFACES SO THIN FILMS: STRESSES AND MECHANICAL PROPERTIES IV SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Thin Films: Stresses and Mechanical Properties IV, at the 1993 Spring Meeting of the Materials-Research-Society CY APR 12-16, 1993 CL SAN FRANCISCO, CA SP MAT RES SOC, DOW CHEM CO, ADV MICRO DEVICES, LAWRENCE LIVERMORE NATL LAB, NANO INSTRUMENTS INC, QUAD GRP, TENCOR INSTRUMENTS, INDUSTRY CORNELL UNIV, ALLIANCE ELECTR PACKAGE C1 LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. NR 0 TC 1 Z9 1 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-204-9 J9 MATER RES SOC SYMP P PY 1993 VL 308 BP 549 EP 553 DI 10.1557/PROC-308-549 PG 5 WC Materials Science, Multidisciplinary; Mechanics; Physics, Applied SC Materials Science; Mechanics; Physics GA BZ55E UT WOS:A1993BZ55E00080 ER PT S AU GRIMSDITCH, M FULLERTON, EE SCHULLER, IK AF GRIMSDITCH, M FULLERTON, EE SCHULLER, IK BE Townsend, PH Weihs, TP Sanchez, JE Borgesen, P TI PHENOMENOLOGICAL EXPLANATION OF ELASTIC ANOMALIES IN SUPERLATTICES SO THIN FILMS: STRESSES AND MECHANICAL PROPERTIES IV SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Thin Films: Stresses and Mechanical Properties IV, at the 1993 Spring Meeting of the Materials-Research-Society CY APR 12-16, 1993 CL SAN FRANCISCO, CA SP MAT RES SOC, DOW CHEM CO, ADV MICRO DEVICES, LAWRENCE LIVERMORE NATL LAB, NANO INSTRUMENTS INC, QUAD GRP, TENCOR INSTRUMENTS, INDUSTRY CORNELL UNIV, ALLIANCE ELECTR PACKAGE C1 ARGONNE NATL LAB,DIV MAT SCI & ENGN,ARGONNE,IL 60439. RI Fullerton, Eric/H-8445-2013 OI Fullerton, Eric/0000-0002-4725-9509 NR 0 TC 15 Z9 15 U1 1 U2 2 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-204-9 J9 MATER RES SOC SYMP P PY 1993 VL 308 BP 685 EP 693 DI 10.1557/PROC-308-685 PG 9 WC Materials Science, Multidisciplinary; Mechanics; Physics, Applied SC Materials Science; Mechanics; Physics GA BZ55E UT WOS:A1993BZ55E00102 ER PT S AU BELAK, J BOERCKER, DB AF BELAK, J BOERCKER, DB BE Townsend, PH Weihs, TP Sanchez, JE Borgesen, P TI MOLECULAR-DYNAMICS MODELING OF THE MECHANICAL-BEHAVIOR OF METALLIC MULTILAYERS SO THIN FILMS: STRESSES AND MECHANICAL PROPERTIES IV SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Thin Films: Stresses and Mechanical Properties IV, at the 1993 Spring Meeting of the Materials-Research-Society CY APR 12-16, 1993 CL SAN FRANCISCO, CA SP MAT RES SOC, DOW CHEM CO, ADV MICRO DEVICES, LAWRENCE LIVERMORE NATL LAB, NANO INSTRUMENTS INC, QUAD GRP, TENCOR INSTRUMENTS, INDUSTRY CORNELL UNIV, ALLIANCE ELECTR PACKAGE C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 4 Z9 4 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-204-9 J9 MATER RES SOC SYMP P PY 1993 VL 308 BP 743 EP 746 DI 10.1557/PROC-308-743 PG 4 WC Materials Science, Multidisciplinary; Mechanics; Physics, Applied SC Materials Science; Mechanics; Physics GA BZ55E UT WOS:A1993BZ55E00111 ER PT S AU KUNG, H NASTASI, M JERVIS, TR HUBBARD, KM MESSNER, RM MITCHELL, TE EMBURY, JD AF KUNG, H NASTASI, M JERVIS, TR HUBBARD, KM MESSNER, RM MITCHELL, TE EMBURY, JD BE Townsend, PH Weihs, TP Sanchez, JE Borgesen, P TI THE STRUCTURE AND MECHANICAL-PROPERTIES OF RU-CU AND RU-TI NANOLAYER COMPOSITES SO THIN FILMS: STRESSES AND MECHANICAL PROPERTIES IV SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Thin Films: Stresses and Mechanical Properties IV, at the 1993 Spring Meeting of the Materials-Research-Society CY APR 12-16, 1993 CL SAN FRANCISCO, CA SP MAT RES SOC, DOW CHEM CO, ADV MICRO DEVICES, LAWRENCE LIVERMORE NATL LAB, NANO INSTRUMENTS INC, QUAD GRP, TENCOR INSTRUMENTS, INDUSTRY CORNELL UNIV, ALLIANCE ELECTR PACKAGE C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. NR 0 TC 4 Z9 4 U1 0 U2 2 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-204-9 J9 MATER RES SOC SYMP P PY 1993 VL 308 BP 747 EP 752 DI 10.1557/PROC-308-747 PG 6 WC Materials Science, Multidisciplinary; Mechanics; Physics, Applied SC Materials Science; Mechanics; Physics GA BZ55E UT WOS:A1993BZ55E00112 ER PT S AU WEIHS, TP BARBEE, TW WALL, MA AF WEIHS, TP BARBEE, TW WALL, MA BE Townsend, PH Weihs, TP Sanchez, JE Borgesen, P TI USING THE RULE OF MIXTURES TO EXAMINE THE HARDNESS OF CU/CU-ZR MULTILAYERS SO THIN FILMS: STRESSES AND MECHANICAL PROPERTIES IV SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Thin Films: Stresses and Mechanical Properties IV, at the 1993 Spring Meeting of the Materials-Research-Society CY APR 12-16, 1993 CL SAN FRANCISCO, CA SP MAT RES SOC, DOW CHEM CO, ADV MICRO DEVICES, LAWRENCE LIVERMORE NATL LAB, NANO INSTRUMENTS INC, QUAD GRP, TENCOR INSTRUMENTS, INDUSTRY CORNELL UNIV, ALLIANCE ELECTR PACKAGE C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RI Weihs, Timothy/A-3313-2010 NR 0 TC 4 Z9 4 U1 0 U2 0 PU MATERIALS RESEARCH SOC PI PITTSBURGH PA 9800 MCKNIGHT RD, SUITE 327, PITTSBURGH, PA 15237 SN 0272-9172 BN 1-55899-204-9 J9 MATER RES SOC SYMP P PY 1993 VL 308 BP 753 EP 758 DI 10.1557/PROC-308-753 PG 6 WC Materials Science, Multidisciplinary; Mechanics; Physics, Applied SC Materials Science; Mechanics; Physics GA BZ55E UT WOS:A1993BZ55E00113 ER PT B AU GRAY, GT MORRIS, CE LAWSON, AC AF GRAY, GT MORRIS, CE LAWSON, AC BE Froes, FH Caplan, IL TI OMEGA PHASE-FORMATION IN TITANIUM AND TITANIUM-ALLOYS SO TITANIUM '92: SCIENCE AND TECHNOLOGY, VOLS 1-3 LA English DT Proceedings Paper CT Symposium on Titanium: Science and technology, at the 7th World Titanium Conference CY JUN 29-JUL 02, 1992 CL SAN DIEGO, CA SP MINERALS MET & MAT SOC, STRUCT MET DIV, TITANIUM COMM C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 17 Z9 17 U1 0 U2 1 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-222-1 PY 1993 BP 225 EP 232 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Materials Science, Characterization & Testing SC Materials Science; Metallurgy & Metallurgical Engineering GA BB20G UT WOS:A1993BB20G00025 ER PT B AU RUSSELL, AM JENSEN, JA CHUMBLEY, LS KONITZER, DG ELLIS, TW AF RUSSELL, AM JENSEN, JA CHUMBLEY, LS KONITZER, DG ELLIS, TW BE Froes, FH Caplan, IL TI IN-SITU STRENGTHENING IN TITANIUM SO TITANIUM '92: SCIENCE AND TECHNOLOGY, VOLS 1-3 LA English DT Proceedings Paper CT Symposium on Titanium: Science and technology, at the 7th World Titanium Conference CY JUN 29-JUL 02, 1992 CL SAN DIEGO, CA SP MINERALS MET & MAT SOC, STRUCT MET DIV, TITANIUM COMM C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. NR 0 TC 2 Z9 2 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-222-1 PY 1993 BP 407 EP 414 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Materials Science, Characterization & Testing SC Materials Science; Metallurgy & Metallurgical Engineering GA BB20G UT WOS:A1993BB20G00047 ER PT B AU GRAY, GT HONG, SI MARQUARDT, BJ AF GRAY, GT HONG, SI MARQUARDT, BJ BE Froes, FH Caplan, IL TI INFLUENCE OF STRAIN ATE ON THE STRUCTURE-PROPERTY BEHAVIOR OF THE ALPHA-2 ALLOY TI-24.5AL-10.5NB-1.5MO SO TITANIUM '92: SCIENCE AND TECHNOLOGY, VOLS 1-3 LA English DT Proceedings Paper CT Symposium on Titanium: Science and technology, at the 7th World Titanium Conference CY JUN 29-JUL 02, 1992 CL SAN DIEGO, CA SP MINERALS MET & MAT SOC, STRUCT MET DIV, TITANIUM COMM C1 LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. NR 0 TC 1 Z9 1 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-222-1 PY 1993 BP 1163 EP 1170 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Materials Science, Characterization & Testing SC Materials Science; Metallurgy & Metallurgical Engineering GA BB20G UT WOS:A1993BB20G00139 ER PT B AU FISHER, GT TRAUT, DE AF FISHER, GT TRAUT, DE BE Froes, FH Caplan, IL TI INDUCTION SLAG PROCESS FOR PRODUCING TITANIUM BY REDUCTION OF CALCIUM FLUOROTITANATE SO TITANIUM '92: SCIENCE AND TECHNOLOGY, VOLS 1-3 LA English DT Proceedings Paper CT Symposium on Titanium: Science and technology, at the 7th World Titanium Conference CY JUN 29-JUL 02, 1992 CL SAN DIEGO, CA SP MINERALS MET & MAT SOC, STRUCT MET DIV, TITANIUM COMM C1 US BUR MINES,ALBANY RES CTR,ALBANY,OR 97321. NR 0 TC 1 Z9 1 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 BN 0-87339-222-1 PY 1993 BP 2393 EP 2400 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Materials Science, Characterization & Testing SC Materials Science; Metallurgy & Metallurgical Engineering GA BB20G UT WOS:A1993BB20G00292 ER PT B AU SCHIPPER, L DUERR, P STEINER, R AN, F STROM, S AF SCHIPPER, L DUERR, P STEINER, R AN, F STROM, S GP ORG ECON COOPERAT & DEV TI ENERGY USE IN PASSENGER TRANSPORT IN OECD COUNTRIES - TRENDS AND GOALS SO TOWARD CLEAN AND FUEL EFFICIENT AUTOMOBILES LA English DT Proceedings Paper CT International Conference on Tomorrows Clean and Fuel-Efficient Automobile - Opportunities for East-West Co-Operation CY MAR 25-27, 1991 CL BERLIN, GERMANY SP ORG ECON COOPERAT & DEV, INT ENERGY AGCY, EUROPEAN CONF MINISTERS TRANSPORT, COMMISS EUROPEAN COMMUNITIES C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ORGANIZATION ECONOMIC COOPERATION & DEVELOPMENT PI PARIS PA 2, RUE ANDRE PASCAL, CEDEX 16, 75775 PARIS, FRANCE BN 92-64-03868-X PY 1993 BP 121 EP 135 PG 15 WC Engineering, Civil; Engineering, Mechanical; Environmental Sciences; Environmental Studies; Transportation SC Engineering; Environmental Sciences & Ecology; Transportation GA BC37U UT WOS:A1993BC37U00009 ER PT B AU BROGAN, JJ VENKATESWARAN, SR AF BROGAN, JJ VENKATESWARAN, SR GP ORG ECON COOPERAT & DEV TI UNITED STATES DEPARTMENT OF ENERGYS PERSPECTIVE ON FUEL-EFFICIENT AND LOW-EMISSION PROPULSION TECHNOLOGY OPTIONS FOR AUTOMOBILES SO TOWARD CLEAN AND FUEL EFFICIENT AUTOMOBILES LA English DT Proceedings Paper CT International Conference on Tomorrows Clean and Fuel-Efficient Automobile - Opportunities for East-West Co-Operation CY MAR 25-27, 1991 CL BERLIN, GERMANY SP ORG ECON COOPERAT & DEV, INT ENERGY AGCY, EUROPEAN CONF MINISTERS TRANSPORT, COMMISS EUROPEAN COMMUNITIES C1 US DOE,OFF PROPULS SYST,WASHINGTON,DC 20545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ORGANIZATION ECONOMIC COOPERATION & DEVELOPMENT PI PARIS PA 2, RUE ANDRE PASCAL, CEDEX 16, 75775 PARIS, FRANCE BN 92-64-03868-X PY 1993 BP 384 EP 398 PG 15 WC Engineering, Civil; Engineering, Mechanical; Environmental Sciences; Environmental Studies; Transportation SC Engineering; Environmental Sciences & Ecology; Transportation GA BC37U UT WOS:A1993BC37U00030 ER PT B AU SCHIPPER, L AF SCHIPPER, L GP ORG ECON COOPERAT & DEV TI ENERGY EFFICIENCY IN SOVIET TRANSPORT - MIRAGE OR REALITY SO TOWARD CLEAN AND FUEL EFFICIENT AUTOMOBILES LA English DT Proceedings Paper CT International Conference on Tomorrows Clean and Fuel-Efficient Automobile - Opportunities for East-West Co-Operation CY MAR 25-27, 1991 CL BERLIN, GERMANY SP ORG ECON COOPERAT & DEV, INT ENERGY AGCY, EUROPEAN CONF MINISTERS TRANSPORT, COMMISS EUROPEAN COMMUNITIES C1 LAWRENCE BERKELEY LAB,INT ENERGY STUDIES,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ORGANIZATION ECONOMIC COOPERATION & DEVELOPMENT PI PARIS PA 2, RUE ANDRE PASCAL, CEDEX 16, 75775 PARIS, FRANCE BN 92-64-03868-X PY 1993 BP 557 EP 560 PG 4 WC Engineering, Civil; Engineering, Mechanical; Environmental Sciences; Environmental Studies; Transportation SC Engineering; Environmental Sciences & Ecology; Transportation GA BC37U UT WOS:A1993BC37U00047 ER PT J AU HOGAN, BL YEUNG, ES AF HOGAN, BL YEUNG, ES TI SINGLE-CELL ANALYSIS AT THE LEVEL OF A SINGLE HUMAN ERYTHROCYTE SO TRAC-TRENDS IN ANALYTICAL CHEMISTRY LA English DT Article ID TUBULAR LIQUID-CHROMATOGRAPHY; CAPILLARY ELECTROPHORESIS; INDIVIDUAL NEURONS; DOPAMINE AB A new milestone has been reached in the separation and detection of the chemical contents inside a single red blood cell, which has a volume of only 90 fl. Three laser-based monitoring techniques are employed. These are in vivo derivatization of glutathione, indirect detection of Na and K by charge displacement and UV-excited native protein fluorescence. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 31 TC 18 Z9 18 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0165-9936 J9 TRAC-TREND ANAL CHEM JI Trac-Trends Anal. Chem. PD JAN PY 1993 VL 12 IS 1 BP 4 EP 9 DI 10.1016/0165-9936(93)85007-6 PG 6 WC Chemistry, Analytical SC Chemistry GA KR290 UT WOS:A1993KR29000006 ER PT J AU ADAMS, SM BROWN, AM GOEDE, RW AF ADAMS, SM BROWN, AM GOEDE, RW TI A QUANTITATIVE HEALTH ASSESSMENT INDEX FOR RAPID EVALUATION OF FISH CONDITION IN THE FIELD SO TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY LA English DT Article ID MILL EFFLUENTS; LIVER; STRESS AB The health assessment index (HAI) is an extension and refinement of a previously published field necropsy system. The HAI is a quantitative index that allows statistical comparisons of fish health among data sets. Index variables are assigned numerical values based on the degree of severity or damage incurred by an organ or tissue from environmental stressors. This approach has been used to evaluate the general health status of fish populations in a wide range of reservoir types in the Tennessee River basin (North Carolina, Tennessee, Alabama, Kentucky), in Hartwell Reservoir (Georgia, South Carolina) that is contaminated by polychlorinated biphenyls, and in the Pigeon River (Tennessee, North Carolina) that receives effluents from a bleached kraft mill. The ability of the HAI to accurately characterize the health of fish in these systems was evaluated by comparing this index to other types of fish health measures (contaminant, bioindicator, and reproductive analysis) made at the same time as the HAI. In all cases, the HAI demonstrated the same pattern of fish health status between sites as did each of the other more sophisticated health assessment methods. The HAI has proven to be a simple and inexpensive means of rapidly assessing general fish health in field situations. C1 TENNESSEE VALLEY AUTHOR,AQUAT BIOL LAB,NORRIS,TN 37828. UTAH DIV WILDLIFE RESOURCES,FISHERIES EXPT STN,LOGAN,UT 84321. RP ADAMS, SM (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA. NR 29 TC 126 Z9 134 U1 2 U2 33 PU AMER FISHERIES SOC PI BETHESDA PA 5410 GROSVENOR LANE SUITE 110, BETHESDA, MD 20814-2199 SN 0002-8487 J9 T AM FISH SOC JI Trans. Am. Fish. Soc. PD JAN PY 1993 VL 122 IS 1 BP 63 EP 73 DI 10.1577/1548-8659(1993)122<0063:AQHAIF>2.3.CO;2 PG 11 WC Fisheries SC Fisheries GA LG893 UT WOS:A1993LG89300004 ER PT B AU RAMAKRISHNAN, V GERCHMAN, SE GOLDEN, BL HOFFMAN, DW KYCIA, JH PORTER, SJ WHITE, SW AF RAMAKRISHNAN, V GERCHMAN, SE GOLDEN, BL HOFFMAN, DW KYCIA, JH PORTER, SJ WHITE, SW BE Nierhaus, KH Franceschi, F Subramanian, AR Erdmann, VA WittmannLiebold, B TI STRUCTURAL STUDIES ON PROKARYOTIC RIBOSOMAL-PROTEINS SO TRANSLATIONAL APPARATUS: STRUCTURE, FUNCTION, REGULATION, EVOLUTION LA English DT Proceedings Paper CT International Conference on the Translational Apparatus CY OCT 31-NOV 05, 1992 CL BERLIN, GERMANY C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. NR 0 TC 5 Z9 5 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44538-7 PY 1993 BP 533 EP 544 PG 12 WC Biochemistry & Molecular Biology; Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Genetics & Heredity GA BZ51F UT WOS:A1993BZ51F00050 ER PT J AU AVERY, ME AF AVERY, ME TI CHARACTERIZATION OF NITROGENOUS SOLUTES IN TISSUES AND XYLEM SAP OF LEUCAENA-LEUCOCEPHALA SO TREE PHYSIOLOGY LA English DT Article DE AMINO ACIDS; DIHYDROXYPIPECOLIC ACID BETAINE; HYDROXYPIPECOLIC ACID; MIMOSINE; PIPECOLIC ACID AB Amino acid profiles of leaf, stem, and root tissues from nodulated and nonnodulated Leucaena leucocephala (Lam.) de Wit plants were determined by gas chromatography-mass spectrometry. High concentrations of mimosine and several other potentially toxic nonprotein amino acids, including pipecolic acid, and two isomers of hydroxypipecolic acid, were identified in the tissues. Five metabolites remain unidentified. Of the foliar free amino acid nitrogen, 57-66% was associated with the potentially toxic amino acids. Major constituents in the leaf tissues of nonnodulated plants were mimosine and hydroxypipecolic acid (isomer 1). Mimosine was recovered in both the neutral plus basic and acidic amino, acid fractions. Major differences between amino acid profiles of nodulated and nonnodulated roots were the low percentages of asparagine + aspartate (3.6% of the total pool compared to 33% in nodulated plants) and pipecolic acid in nonnodulated roots (1% of the total compared to 12.5% in nodulated plants). A novel plant betaine (dihydroxypipecolic acid betaine) was identified by fast-atom-bombardment mass spectrometry in leaf tissues, albeit at relatively low concentrations (< 1 mumol per gram fresh weight). Analyses of the xylem sap collected from nodulated plants confirmed that Leucaena is an asparagine transporter, as suggested by the high concentrations of asparagine and the low concentrations of ureides in its root nodules. Amino acid profiles of xylem sap from nonnodulated plants showed extremely low concentrations of asparagine + aspartate (0.12 mumol ml-1), whereas asparagine + aspartate was the major constituent (4.38 mumol ml-1) in the xylem sap of nodulated plants. Two nonprotein amino acids, pipecolic acid and hydroxypipecolic acid, were major constituents of the xylem sap of nodulated and nonnodulated plants, respectively. Three unidentified compounds detected in xylem sap samples from both modulated and nonnodulated plants did not correspond with any of the peaks characterized from tissue samples. RP AVERY, ME (reprint author), ARGONNE NATL LAB,DIV ENVIRONM RES,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU HERON PUBLISHING PI VICTORIA PA BOX 5579 STATION B, VICTORIA BC V8R 6S4, CANADA SN 0829-318X J9 TREE PHYSIOL JI Tree Physiol. PD JAN PY 1993 VL 12 IS 1 BP 23 EP 40 PG 18 WC Forestry SC Forestry GA KM078 UT WOS:A1993KM07800003 ER PT S AU BLAU, PJ AF BLAU, PJ BE Ruff, AW Bayer, RG TI A RETROSPECTIVE SURVEY OF THE USE OF LABORATORY TESTS TO SIMULATE INTERNAL-COMBUSTION ENGINE MATERIALS TRIBOLOGY PROBLEMS SO TRIBOLOGY: WEAR TEST SELECTION FOR DESIGN AND APPLICATION SE AMERICAN SOCIETY FOR TESTING AND MATERIALS SPECIAL TECHNICAL PUBLICATION LA English DT Proceedings Paper CT Symposium on Tribology: Wear Test Selection for Design and Application CY DEC 09, 1992 CL MIAMI, FL SP AMER SOC TESTING & MAT, COMM WEAR & EROS DE FRICTION TESTING; LUBRICATION; WEAR TESTING; INTERNAL COMBUSTION ENGINE; SIMULATION; TRIBOLOGY; VALVES; PISTONS; CAM ROLLERS C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMERICAN SOCIETY TESTING AND MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DRIVE, W CONSHOHOCKEN, PA 19428-2959 SN 1071-5827 BN 0-8031-1856-2 J9 AM SOC TEST MATER PY 1993 VL 1199 BP 133 EP 148 DI 10.1520/STP15969S PG 16 WC Mechanics SC Mechanics GA BZ48Q UT WOS:A1993BZ48Q00010 ER PT B AU LOUBRIEL, GM ZUTAVERN, FJ DENISON, GJ HELGESON, WD MCLAUGHLIN, DL OMALLEY, MW DEMAREST, JA AF LOUBRIEL, GM ZUTAVERN, FJ DENISON, GJ HELGESON, WD MCLAUGHLIN, DL OMALLEY, MW DEMAREST, JA BE Bertoni, HL Carin, L Felsen, LB TI PHOTOCONDUCTIVE SEMICONDUCTOR SWITCHES FOR HIGH-POWER RADIATION SO ULTRA-WIDEBAND, SHORT-PULSE ELECTROMAGNETICS LA English DT Proceedings Paper CT 2nd WRI International Conference on Ultra-Wideband Short-Pulse Electromagnetics CY OCT 08-10, 1992 CL POLYTECH UNIV, BROOKLYN, NY SP USAF, OFF SCI RES, USAF, SYST COMMAND, ROME LAB HO POLYTECH UNIV C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44530-1 PY 1993 BP 29 EP 36 PG 8 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BZ51H UT WOS:A1993BZ51H00003 ER PT B AU CLARK, RS RINEHART, LF BUTTRAM, MT AURAND, JF AF CLARK, RS RINEHART, LF BUTTRAM, MT AURAND, JF BE Bertoni, HL Carin, L Felsen, LB TI AN OVERVIEW OF SANDIA-NATIONAL-LABORATORIES PLASMA SWITCHED, GIGAWATT, ULTRA-WIDE-BAND IMPULSE TRANSMITTER PROGRAM SO ULTRA-WIDEBAND, SHORT-PULSE ELECTROMAGNETICS LA English DT Proceedings Paper CT 2nd WRI International Conference on Ultra-Wideband Short-Pulse Electromagnetics CY OCT 08-10, 1992 CL POLYTECH UNIV, BROOKLYN, NY SP USAF, OFF SCI RES, USAF, SYST COMMAND, ROME LAB HO POLYTECH UNIV C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 27 Z9 30 U1 0 U2 0 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44530-1 PY 1993 BP 93 EP 98 PG 6 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BZ51H UT WOS:A1993BZ51H00010 ER PT B AU MILLER, EK AF MILLER, EK BE Bertoni, HL Carin, L Felsen, LB TI ON USING SCATTERING STATISTICS FOR ULTRA-WIDE-BAND ELECTROMAGNETIC TARGET CLASSIFICATION AND IDENTIFICATION SO ULTRA-WIDEBAND, SHORT-PULSE ELECTROMAGNETICS LA English DT Proceedings Paper CT 2nd WRI International Conference on Ultra-Wideband Short-Pulse Electromagnetics CY OCT 08-10, 1992 CL POLYTECH UNIV, BROOKLYN, NY SP USAF, OFF SCI RES, USAF, SYST COMMAND, ROME LAB HO POLYTECH UNIV C1 LOS ALAMOS NATL LAB,GRP MEE-3,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 1 U2 1 PU PLENUM PRESS DIV PLENUM PUBLISHING CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 BN 0-306-44530-1 PY 1993 BP 493 EP 500 PG 8 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BZ51H UT WOS:A1993BZ51H00054 ER PT B AU LANDEN, OL BELL, PM OERTEL, JA SATARIANO, JJ BRADLEY, DK AF LANDEN, OL BELL, PM OERTEL, JA SATARIANO, JJ BRADLEY, DK BE Roehrenbeck, PW TI GAIN UNIFORMITY, LINEARITY, SATURATION AND DEPLETION IN GATED MICROCHANNEL-PLATE X-RAY FRAMING CAMERAS SO ULTRAHIGH- AND HIGH-SPEED PHOTOGRAPHY, VIDEOGRAPHY, AND PHOTONICS '93 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Ultrahigh-Speed and High-Speed Photography, Videography, and Photonics 1993 CY JUL 13-14, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 32 Z9 33 U1 1 U2 2 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1251-1 J9 P SOC PHOTO-OPT INS PY 1993 VL 2002 BP 2 EP 13 DI 10.1117/12.161355 PG 12 WC Optics; Imaging Science & Photographic Technology SC Optics; Imaging Science & Photographic Technology GA BZ81G UT WOS:A1993BZ81G00001 ER PT B AU DERZON, MS FILUK, AB PANTUSO, J DUKART, RJ OLSEN, R BARBER, T AF DERZON, MS FILUK, AB PANTUSO, J DUKART, RJ OLSEN, R BARBER, T BE Roehrenbeck, PW TI DEVELOPMENT AND CHARACTERIZATION OF A TIME-RESOLVED, POSITION-RESOLVED AND ENERGY-RESOLVED X-RAY DIAGNOSTIC FOR PBFA-II TARGET EXPERIMENTS SO ULTRAHIGH- AND HIGH-SPEED PHOTOGRAPHY, VIDEOGRAPHY, AND PHOTONICS '93 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Ultrahigh-Speed and High-Speed Photography, Videography, and Photonics 1993 CY JUL 13-14, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 4 Z9 4 U1 0 U2 1 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1251-1 J9 P SOC PHOTO-OPT INS PY 1993 VL 2002 BP 31 EP 41 DI 10.1117/12.161368 PG 11 WC Optics; Imaging Science & Photographic Technology SC Optics; Imaging Science & Photographic Technology GA BZ81G UT WOS:A1993BZ81G00004 ER PT B AU YATES, GJ ALBRIGHT, KL TURKO, BT AF YATES, GJ ALBRIGHT, KL TURKO, BT BE Roehrenbeck, PW TI MULTIPORT SOLID-STATE IMAGER CHARACTERIZATION AT VARIABLE PIXEL RATES SO ULTRAHIGH- AND HIGH-SPEED PHOTOGRAPHY, VIDEOGRAPHY, AND PHOTONICS '93 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Ultrahigh-Speed and High-Speed Photography, Videography, and Photonics 1993 CY JUL 13-14, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1251-1 J9 P SOC PHOTO-OPT INS PY 1993 VL 2002 BP 79 EP 96 DI 10.1117/12.161362 PG 18 WC Optics; Imaging Science & Photographic Technology SC Optics; Imaging Science & Photographic Technology GA BZ81G UT WOS:A1993BZ81G00007 ER PT B AU TURKO, BT YATES, GJ ALBRIGHT, KL KING, NSP AF TURKO, BT YATES, GJ ALBRIGHT, KL KING, NSP BE Roehrenbeck, PW TI HIGH-SPEED CCD IMAGE-PROCESSING AT 75 MSPS AND 10-BIT RANGE SO ULTRAHIGH- AND HIGH-SPEED PHOTOGRAPHY, VIDEOGRAPHY, AND PHOTONICS '93 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Ultrahigh-Speed and High-Speed Photography, Videography, and Photonics 1993 CY JUL 13-14, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1251-1 J9 P SOC PHOTO-OPT INS PY 1993 VL 2002 BP 97 EP 100 DI 10.1117/12.161363 PG 4 WC Optics; Imaging Science & Photographic Technology SC Optics; Imaging Science & Photographic Technology GA BZ81G UT WOS:A1993BZ81G00008 ER PT B AU LERCHE, RA PHILLION, DW TIETBOHL, GL AF LERCHE, RA PHILLION, DW TIETBOHL, GL BE Roehrenbeck, PW TI NEUTRON DETECTOR FOR FUSION REACTION-RATE MEASUREMENTS SO ULTRAHIGH- AND HIGH-SPEED PHOTOGRAPHY, VIDEOGRAPHY, AND PHOTONICS '93 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Ultrahigh-Speed and High-Speed Photography, Videography, and Photonics 1993 CY JUL 13-14, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 5 Z9 5 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1251-1 J9 P SOC PHOTO-OPT INS PY 1993 VL 2002 BP 153 EP 162 DI 10.1117/12.161361 PG 10 WC Optics; Imaging Science & Photographic Technology SC Optics; Imaging Science & Photographic Technology GA BZ81G UT WOS:A1993BZ81G00015 ER PT B AU ALBRIGHT, KL KING, NSP YATES, GJ MCDONALD, TE TURKO, BT AF ALBRIGHT, KL KING, NSP YATES, GJ MCDONALD, TE TURKO, BT BE Roehrenbeck, PW TI AN RS-170 TO 700 FRAME PER 2ND CCD CAMERA SO ULTRAHIGH- AND HIGH-SPEED PHOTOGRAPHY, VIDEOGRAPHY, AND PHOTONICS '93 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Ultrahigh-Speed and High-Speed Photography, Videography, and Photonics 1993 CY JUL 13-14, 1993 CL SAN DIEGO, CA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1251-1 J9 P SOC PHOTO-OPT INS PY 1993 VL 2002 BP 172 EP 179 DI 10.1117/12.161366 PG 8 WC Optics; Imaging Science & Photographic Technology SC Optics; Imaging Science & Photographic Technology GA BZ81G UT WOS:A1993BZ81G00017 ER PT J AU WANG, ZL FISHER, AT AF WANG, ZL FISHER, AT TI ELECTRON ENERGY-LOSS SPECTROSCOPY OF HIGH-ANGLE THERMAL-DIFFUSE-SCATTERED ELECTRONS IN TEM SO ULTRAMICROSCOPY LA English DT Article ID CRYSTALS AB New techniques are introduced to acquire the electron energy-loss spectra (EELS) of high-angle thermal-diffuse-scattered (TDS) electrons in a conventional transmission electron microscope (TEM). TDS-EELS is shown to be temperature sensitive and may contain information about atomic Debye-Waller factors. Significant differences have been observed in TDS-EELS in comparison to the EELS acquired in the bright-field mode. Experimental conditions have been investigated to optimize signal intensities. TDS-EELS spectra of a Si crystal have been used to deduce the atomic mean vibration amplitude of Si atoms. It has been shown that multiple plasmon scattering has little effect on data acquisition and that the signals are generated primarily by phonon-single electron, double-inelastic scattering processes. However, it has not been confirmed which of the coherent and incoherent double scattering processes is the dominant mechanism, because the experimental data appear not to support the incoherent model. C1 UNIV TENNESSEE,DEPT MAT SCI & ENGN,KNOXVILLE,TN 37996. RP WANG, ZL (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. RI Wang, Zhong Lin/E-2176-2011 OI Wang, Zhong Lin/0000-0002-5530-0380 NR 14 TC 5 Z9 5 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3991 J9 ULTRAMICROSCOPY JI Ultramicroscopy PD JAN PY 1993 VL 48 IS 1-2 BP 183 EP 196 DI 10.1016/0304-3991(93)90181-V PG 14 WC Microscopy SC Microscopy GA KM788 UT WOS:A1993KM78800016 ER PT B AU LEE, K AF LEE, K GP ULTRASONICS TI STUDY OF CHEMICAL-REACTIONS UNDER THE INFLUENCE OF ULTRASOUND SO ULTRASONICS INTERNATIONAL 93 - CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Ultrasonics International Conference CY JUL 06-08, 1993 CL VIENNA, AUSTRIA SP ULTRASONICS DE SONOCHEMISTRY; NITRATION; OXIDATION; REACTION RATE C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 1 Z9 1 U1 0 U2 0 PU BUTTERWORTH-HEINEMANN PI OXFORD PA LINACRE HOUSE, JORDAN HILL, OXFORD, OXON, ENGLAND OX2 8DP BN 0-750618-77-9 PY 1993 BP 743 EP 746 PG 4 WC Acoustics SC Acoustics GA BA27D UT WOS:A1993BA27D00178 ER PT J AU MILLER, DL THOMAS, RM AF MILLER, DL THOMAS, RM TI A COMPARISON OF HEMOLYTIC AND SONOCHEMICAL ACTIVITY OF ULTRASONIC CAVITATION IN A ROTATING TUBE SO ULTRASOUND IN MEDICINE AND BIOLOGY LA English DT Article DE BIOLOGICAL EFFECTS; CELL LYSIS; HYDROGEN PEROXIDE; FREE RADICALS; DOSIMETRY; MECHANISMS ID SINGLE-STRAND BREAKS; HYDROGEN-PEROXIDE; INVITRO; SYSTEM; CELLS; DNA AB Biological effects of in vitro ultrasonic exposure may result from mechanical and from sonochemical mechanisms related to ultrasonic cavitation. Mechanical cell lysis by 1.61 MHz ultrasonic cavitation was assessed in a rotating tube exposure system by hemolysis measurements. Free radical generation was assessed by the terephthalic acid dosimeter, calibrated by gamma-ray dosage. Sonochemical production was assessed by measuring residual hydrogen peroxide using the sensitive isoluminol method. Exposure conditions were similar for all tests, except longer durations were needed for the free radical and hydrogen peroxide tests. The sonochemical mechanisms were relatively more important for increasing intensity, and increasing temperature. Increasing rotation speed or bubbling with argon before exposure enhanced all cavitation activity. Stopping the rotation reduced all cavitation activity. Burst-mode ultrasound (10.5 mus bursts, 1:1 or 1:3 duty cycle) reduced cavitation activity, but gave relatively greater sonochemical activity under some conditions. These results indicate that the mechanical and sonochemical mechanisms can be separately favored to some extent by varying exposure conditions. The observed trends should be helpful for selecting exposure conditions favorable for studying bioeffects of the sonochemical mechanism. RP MILLER, DL (reprint author), PACIFIC NW LAB, DEPT BIOL & CHEM, POB 999, RICHLAND, WA 99352 USA. NR 13 TC 22 Z9 22 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0301-5629 J9 ULTRASOUND MED BIOL JI Ultrasound Med. Biol. PY 1993 VL 19 IS 1 BP 83 EP 90 DI 10.1016/0301-5629(93)90021-F PG 8 WC Acoustics; Radiology, Nuclear Medicine & Medical Imaging SC Acoustics; Radiology, Nuclear Medicine & Medical Imaging GA KN072 UT WOS:A1993KN07200011 PM 8456532 ER PT J AU MILLER, DL THOMAS, RM AF MILLER, DL THOMAS, RM TI ULTRASONIC GAS BODY ACTIVATION IN ELODEA LEAVES AND THE MECHANICAL INDEX SO ULTRASOUND IN MEDICINE AND BIOLOGY LA English DT Article DE ULTRASOUND BIOEFFECTS; MECHANICAL INDEX; CAVITATION ID DIAGNOSTIC ULTRASOUND; CAVITATION AB Membrane damage resulting from ultrasonic gas body activation was investigated in leaves of the aquatic plant Elodea using pulse-mode exposures from 0.745-15 MHz. The frequency response was similar to that previously observed for continuous exposures. Cell death thresholds were higher for the pulse modes; for example, at 6 MHz the threshold was 166 W/cm2 spatial-peak, pulse-average (SPPA) intensity for 1 mus pulses and 1 kHz pulse repetition frequency (PRF) for 60 s exposures, compared to 12 W/cm2 for 60 ms continuous exposure. Increasing the PRF for 2.5 MHz, 3 mus pulses from 10 Hz to 5 kHz resulted in a gradual decrease in the threshold. Increasing the pulse duration from 1 mus to 30 mus and PRF from 33 Hz to 1 kHz only weakly influenced the threshold, for the constant 60 ms total on-time. Decreasing the pulse duration for single 6 MHz pulses increased the threshold up to 1,540 W/cm2 at 30 mus. The gas body activity was modeled with linear theory for oscillation of the gas channel walls, and intracellular shear stress, which causes lethal damage to the plasma membranes, was modeled with theory for acoustic microstreaming. Theory and observation indicate that the minimum shear stress threshold as a function of resonance frequency has essentially the same form as the Mechanical Index (MI) in the 0.5 to 20 MHz range. Specifically, for 3 mus pulses with 0.2-2 kHz PRF and 60 ms total on-time, the pressure-amplitude threshold divided by the square root of the frequency was approximately constant at 0.95 MPa/MHz1/2. RP MILLER, DL (reprint author), PACIFIC NW LAB, DEPT BIOL & CHEM, POB 999, RICHLAND, WA 99352 USA. FU NCI NIH HHS [CA42947] NR 18 TC 12 Z9 12 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0301-5629 J9 ULTRASOUND MED BIOL JI Ultrasound Med. Biol. PY 1993 VL 19 IS 4 BP 343 EP 351 DI 10.1016/0301-5629(93)90106-X PG 9 WC Acoustics; Radiology, Nuclear Medicine & Medical Imaging SC Acoustics; Radiology, Nuclear Medicine & Medical Imaging GA LE486 UT WOS:A1993LE48600009 PM 8346608 ER PT B AU DELGRANDE, NK DURBIN, PF GORVAD, MR PERKINS, DE CLARK, GA HERNANDEZ, JE SHERWOOD, RJ AF DELGRANDE, NK DURBIN, PF GORVAD, MR PERKINS, DE CLARK, GA HERNANDEZ, JE SHERWOOD, RJ BE Delgrande, NK Cindrich, I Johnson, PB TI DUAL-BAND INFRARED CAPABILITIES FOR IMAGING BURIED OBJECT SITES SO UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT CONF ON UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION CY APR 15-16, 1993 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS RP DELGRANDE, NK (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA BELLINGHAM BN 0-8194-1178-7 J9 P SOC PHOTO-OPT INS PY 1993 VL 1942 BP 166 EP 177 DI 10.1117/12.160337 PG 12 WC Optics SC Optics GA BZ37C UT WOS:A1993BZ37C00017 ER PT B AU CLARK, GA SENGUPTA, SK SHERWOOD, RJ HERNANDEZ, JE BUHL, MR SCHAICH, PC KANE, RJ BARTH, MJ DELGRANDE, NK AF CLARK, GA SENGUPTA, SK SHERWOOD, RJ HERNANDEZ, JE BUHL, MR SCHAICH, PC KANE, RJ BARTH, MJ DELGRANDE, NK BE Delgrande, NK Cindrich, I Johnson, PB TI SENSOR FEATURE FUSION FOR DETECTING BURIED OBJECTS SO UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT CONF ON UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION CY APR 15-16, 1993 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS RP CLARK, GA (reprint author), LAWRENCE LIVERMORE NATL LAB,7000 E AVE L-156,LIVERMORE,CA 94550, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA BELLINGHAM BN 0-8194-1178-7 J9 P SOC PHOTO-OPT INS PY 1993 VL 1942 BP 178 EP 188 DI 10.1117/12.160338 PG 11 WC Optics SC Optics GA BZ37C UT WOS:A1993BZ37C00018 ER PT B AU DELGRANDE, NK DOLAN, KW DURBIN, PF GORVAD, MR KORNBLUM, BT PERKINS, DE SCHNEBERK, DJ SHAPIRO, AB AF DELGRANDE, NK DOLAN, KW DURBIN, PF GORVAD, MR KORNBLUM, BT PERKINS, DE SCHNEBERK, DJ SHAPIRO, AB BE Delgrande, NK Cindrich, I Johnson, PB TI 3-DIMENSIONAL DYNAMIC THERMAL IMAGING OF STRUCTURAL FLAWS BY DUAL-BAND INFRARED COMPUTED-TOMOGRAPHY SO UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT CONF ON UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION CY APR 15-16, 1993 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS RP DELGRANDE, NK (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA BELLINGHAM BN 0-8194-1178-7 J9 P SOC PHOTO-OPT INS PY 1993 VL 1942 BP 207 EP 215 DI 10.1117/12.160340 PG 9 WC Optics SC Optics GA BZ37C UT WOS:A1993BZ37C00021 ER PT B AU THOE, RS AF THOE, RS BE Delgrande, NK Cindrich, I Johnson, PB TI HIGH-RESOLUTION TOMOGRAPHY OF OBJECTS WITH ACCESS TO A SINGLE SIDE SO UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT CONF ON UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION CY APR 15-16, 1993 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS RP THOE, RS (reprint author), LAWRENCE LIVERMORE NATL LAB,DIV L,LIVERMORE,CA 94550, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA BELLINGHAM BN 0-8194-1178-7 J9 P SOC PHOTO-OPT INS PY 1993 VL 1942 BP 218 EP 235 DI 10.1117/12.160341 PG 18 WC Optics SC Optics GA BZ37C UT WOS:A1993BZ37C00022 ER PT B AU MARTZ, HE SCHNEBERK, DJ ROBERSON, GP AF MARTZ, HE SCHNEBERK, DJ ROBERSON, GP BE Delgrande, NK Cindrich, I Johnson, PB TI 3-DIMENSIONAL NONINTRUSIVE IMAGING OF OBSCURED OBJECTS BY X-RAY AND GAMMA-RAY COMPUTED-TOMOGRAPHY SO UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT CONF ON UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION CY APR 15-16, 1993 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS RP MARTZ, HE (reprint author), LAWRENCE LIVERMORE NATL LAB,NDE SECT,POB 808,LIVERMORE,CA 94551, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA BELLINGHAM BN 0-8194-1178-7 J9 P SOC PHOTO-OPT INS PY 1993 VL 1942 BP 236 EP 249 DI 10.1117/12.160342 PG 14 WC Optics SC Optics GA BZ37C UT WOS:A1993BZ37C00023 ER PT B AU THOMAS, GH BENSON, S CRAWFORD, S AF THOMAS, GH BENSON, S CRAWFORD, S BE Delgrande, NK Cindrich, I Johnson, PB TI 3-DIMENSIONAL ULTRASONIC-IMAGING SO UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT CONF ON UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION CY APR 15-16, 1993 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS RP THOMAS, GH (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808 L333,LIVERMORE,CA 94550, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA BELLINGHAM BN 0-8194-1178-7 J9 P SOC PHOTO-OPT INS PY 1993 VL 1942 BP 268 EP 275 DI 10.1117/12.160344 PG 8 WC Optics SC Optics GA BZ37C UT WOS:A1993BZ37C00026 ER PT B AU THOE, RS AF THOE, RS BE Delgrande, NK Cindrich, I Johnson, PB TI SINGLE-SIDED TOMOGRAPHY OF EXTREMELY LARGE DENSE OBJECTS SO UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT CONF ON UNDERGROUND AND OBSCURED OBJECT IMAGING AND DETECTION CY APR 15-16, 1993 CL ORLANDO, FL SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS RP THOE, RS (reprint author), LAWRENCE LIVERMORE NATL LAB,NTES,DIV L,POB 808 L-43,LIVERMORE,CA 94551, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA BELLINGHAM BN 0-8194-1178-7 J9 P SOC PHOTO-OPT INS PY 1993 VL 1942 BP 289 EP 300 DI 10.1117/12.160350 PG 12 WC Optics SC Optics GA BZ37C UT WOS:A1993BZ37C00028 ER PT S AU YASUKAWA, K BODVARSSON, GS WILT, MJ AF YASUKAWA, K BODVARSSON, GS WILT, MJ GP GEOTHERMAL RESOURCES COUNCIL TI A COUPLED SELF-POTENTIAL AND MASS-HEAT FLOW CODE FOR GEOTHERMAL APPLICATIONS SO UTILITIES AND GEOTHERMAL: AN EMERGING PARTNERSHIP SE GEOTHERMAL RESOURCES COUNCIL TRANSACTIONS LA English DT Proceedings Paper CT Geothermal Resources Council 1993 Annual Meeting CY OCT 10-13, 1993 CL BURLINGAME, CA SP GEOTHERMAL RESOURCES COUNCIL C1 LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720. NR 0 TC 6 Z9 6 U1 0 U2 0 PU GEOTHERMAL RESOURCES COUNCIL PI DAVIS PA PO BOX 1350, DAVIS, CA 95617 SN 0193-5933 BN 0-934412-71-5 J9 GEOTH RES T PY 1993 VL 17 BP 203 EP 207 PG 5 WC Energy & Fuels; Geosciences, Multidisciplinary SC Energy & Fuels; Geology GA BZ53U UT WOS:A1993BZ53U00029 ER PT S AU ZUCCA, JJ HUTCHINGS, LJ KASAMEYER, PW AF ZUCCA, JJ HUTCHINGS, LJ KASAMEYER, PW GP GEOTHERMAL RESOURCES COUNCIL TI SEISMIC IMAGING FOR SATURATION CONDITIONS AT THE GEYSERS, CALIFORNIA SO UTILITIES AND GEOTHERMAL: AN EMERGING PARTNERSHIP SE GEOTHERMAL RESOURCES COUNCIL TRANSACTIONS LA English DT Proceedings Paper CT Geothermal Resources Council 1993 Annual Meeting CY OCT 10-13, 1993 CL BURLINGAME, CA SP GEOTHERMAL RESOURCES COUNCIL C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. NR 0 TC 1 Z9 1 U1 0 U2 0 PU GEOTHERMAL RESOURCES COUNCIL PI DAVIS PA PO BOX 1350, DAVIS, CA 95617 SN 0193-5933 BN 0-934412-71-5 J9 GEOTH RES T PY 1993 VL 17 BP 289 EP 293 PG 5 WC Energy & Fuels; Geosciences, Multidisciplinary SC Energy & Fuels; Geology GA BZ53U UT WOS:A1993BZ53U00041 ER PT S AU BURNS, KL POTTER, RM AF BURNS, KL POTTER, RM GP GEOTHERMAL RESOURCES COUNCIL TI POTENTIAL GEOTHERMAL DEVELOPMENT NEAR THE CITY OF CLEARLAKE, CALIFORNIA SO UTILITIES AND GEOTHERMAL: AN EMERGING PARTNERSHIP SE GEOTHERMAL RESOURCES COUNCIL TRANSACTIONS LA English DT Proceedings Paper CT Geothermal Resources Council 1993 Annual Meeting CY OCT 10-13, 1993 CL BURLINGAME, CA SP GEOTHERMAL RESOURCES COUNCIL C1 LOS ALAMOS NATL LAB,DIV EARTH & ENVIRONM SCI,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU GEOTHERMAL RESOURCES COUNCIL PI DAVIS PA PO BOX 1350, DAVIS, CA 95617 SN 0193-5933 BN 0-934412-71-5 J9 GEOTH RES T PY 1993 VL 17 BP 317 EP 323 PG 7 WC Energy & Fuels; Geosciences, Multidisciplinary SC Energy & Fuels; Geology GA BZ53U UT WOS:A1993BZ53U00044 ER PT S AU DUCHANE, D AF DUCHANE, D GP GEOTHERMAL RESOURCES COUNCIL TI HOT DRY ROCK FLOW TESTING - WHAT HAS IT TOLD US - WHAT QUESTIONS REMAIN SO UTILITIES AND GEOTHERMAL: AN EMERGING PARTNERSHIP SE GEOTHERMAL RESOURCES COUNCIL TRANSACTIONS LA English DT Proceedings Paper CT Geothermal Resources Council 1993 Annual Meeting CY OCT 10-13, 1993 CL BURLINGAME, CA SP GEOTHERMAL RESOURCES COUNCIL C1 LOS ALAMOS NATL LAB,DIV EARTH & ENVIRONM SCI,LOS ALAMOS,NM 87545. NR 0 TC 3 Z9 3 U1 0 U2 1 PU GEOTHERMAL RESOURCES COUNCIL PI DAVIS PA PO BOX 1350, DAVIS, CA 95617 SN 0193-5933 BN 0-934412-71-5 J9 GEOTH RES T PY 1993 VL 17 BP 325 EP 330 PG 6 WC Energy & Fuels; Geosciences, Multidisciplinary SC Energy & Fuels; Geology GA BZ53U UT WOS:A1993BZ53U00045 ER PT S AU DUTEAU, R AF DUTEAU, R GP GEOTHERMAL RESOURCES COUNCIL TI A POTENTIAL FOR ENHANCED ENERGY-PRODUCTION BY PERIODIC PRESSURE STIMULATION OF THE PRODUCTION WELL IN AN HDR RESERVOIR SO UTILITIES AND GEOTHERMAL: AN EMERGING PARTNERSHIP SE GEOTHERMAL RESOURCES COUNCIL TRANSACTIONS LA English DT Proceedings Paper CT Geothermal Resources Council 1993 Annual Meeting CY OCT 10-13, 1993 CL BURLINGAME, CA SP GEOTHERMAL RESOURCES COUNCIL C1 LOS ALAMOS NATL LAB,DIV EARTH & ENVIRONM SCI,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 1 U1 0 U2 0 PU GEOTHERMAL RESOURCES COUNCIL PI DAVIS PA PO BOX 1350, DAVIS, CA 95617 SN 0193-5933 BN 0-934412-71-5 J9 GEOTH RES T PY 1993 VL 17 BP 331 EP 334 PG 4 WC Energy & Fuels; Geosciences, Multidisciplinary SC Energy & Fuels; Geology GA BZ53U UT WOS:A1993BZ53U00046 ER PT S AU GOFF, F KENNEDY, BM ADAMS, AI TRUJILLO, PE COUNCE, D AF GOFF, F KENNEDY, BM ADAMS, AI TRUJILLO, PE COUNCE, D GP GEOTHERMAL RESOURCES COUNCIL TI HYDROGEOCHEMICAL EVALUATION OF CONVENTIONAL AND HOT DRY ROCK GEOTHERMAL RESOURCE POTENTIAL IN THE CLEAR LAKE REGION, CALIFORNIA SO UTILITIES AND GEOTHERMAL: AN EMERGING PARTNERSHIP SE GEOTHERMAL RESOURCES COUNCIL TRANSACTIONS LA English DT Proceedings Paper CT Geothermal Resources Council 1993 Annual Meeting CY OCT 10-13, 1993 CL BURLINGAME, CA SP GEOTHERMAL RESOURCES COUNCIL C1 LOS ALAMOS NATL LAB,DIV EARTH & ENVIRONM SCI,LOS ALAMOS,NM 87545. NR 0 TC 4 Z9 4 U1 0 U2 0 PU GEOTHERMAL RESOURCES COUNCIL PI DAVIS PA PO BOX 1350, DAVIS, CA 95617 SN 0193-5933 BN 0-934412-71-5 J9 GEOTH RES T PY 1993 VL 17 BP 335 EP 342 PG 8 WC Energy & Fuels; Geosciences, Multidisciplinary SC Energy & Fuels; Geology GA BZ53U UT WOS:A1993BZ53U00047 ER PT S AU WILT, M TEPLOW, W MEIDAV, T AF WILT, M TEPLOW, W MEIDAV, T GP GEOTHERMAL RESOURCES COUNCIL TI LOW-COST GEOTHERMAL-EXPLORATION AT AMEDEE HOT-SPRINGS, USING SELF-POTENTIAL AND MAGNETICS SO UTILITIES AND GEOTHERMAL: AN EMERGING PARTNERSHIP SE GEOTHERMAL RESOURCES COUNCIL TRANSACTIONS LA English DT Proceedings Paper CT Geothermal Resources Council 1993 Annual Meeting CY OCT 10-13, 1993 CL BURLINGAME, CA SP GEOTHERMAL RESOURCES COUNCIL C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU GEOTHERMAL RESOURCES COUNCIL PI DAVIS PA PO BOX 1350, DAVIS, CA 95617 SN 0193-5933 BN 0-934412-71-5 J9 GEOTH RES T PY 1993 VL 17 BP 459 EP 463 PG 5 WC Energy & Fuels; Geosciences, Multidisciplinary SC Energy & Fuels; Geology GA BZ53U UT WOS:A1993BZ53U00066 ER PT S AU HADGU, T ZIMMERMAN, RW BODVARSSON, GS AF HADGU, T ZIMMERMAN, RW BODVARSSON, GS GP GEOTHERMAL RESOURCES COUNCIL TI COUPLING OF A RESERVOIR SIMULATOR AND A WELLBORE SIMULATOR FOR GEOTHERMAL APPLICATIONS SO UTILITIES AND GEOTHERMAL: AN EMERGING PARTNERSHIP SE GEOTHERMAL RESOURCES COUNCIL TRANSACTIONS LA English DT Proceedings Paper CT Geothermal Resources Council 1993 Annual Meeting CY OCT 10-13, 1993 CL BURLINGAME, CA SP GEOTHERMAL RESOURCES COUNCIL C1 LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU GEOTHERMAL RESOURCES COUNCIL PI DAVIS PA PO BOX 1350, DAVIS, CA 95617 SN 0193-5933 BN 0-934412-71-5 J9 GEOTH RES T PY 1993 VL 17 BP 499 EP 505 PG 7 WC Energy & Fuels; Geosciences, Multidisciplinary SC Energy & Fuels; Geology GA BZ53U UT WOS:A1993BZ53U00072 ER PT J AU HENDREY, GR LEWIN, KF NAGY, J AF HENDREY, GR LEWIN, KF NAGY, J TI FREE AIR CARBON-DIOXIDE ENRICHMENT - DEVELOPMENT, PROGRESS, RESULTS SO VEGETATIO LA English DT Article; Proceedings Paper CT INTERNATIONAL WORKSHOP ON CO2 AND BIOSPHERE CY NOV 15-19, 1991 CL WAGENINGEN, NETHERLANDS SP NETHERLANDS ORG SCI RES, CO2 COMMISS, ROYAL NETHERLANDS ACAD ARTS OF SCI, MINIST HOUSING PHYS PLANNING & ENVIRONM NETHERLANDS, VRIJE UNIV AMSTERDAM, DEPT ECOL & ECOTOXICOL DE FREE-AIR ENRICHMENT; CARBON DIOXIDE; FACE; GLOBAL CHANGE; PLANT RESPONSE; COTTON ID FIELD CROPS; FUMIGATION; POLLUTION; SYSTEM AB Credible predictions of climate change depend in part on predictions of future CO2 concentrations in the atmosphere. Terrestrial plants are a large sink for atmospheric CO2 and the sink rate is influenced by the atmospheric CO2 concentration. Reliable field experiments are needed to evaluate how terrestrial plants will adjust to increasing CO2 and thereby influence the rate of change of atmospheric CO2. Brookhaven National Laboratory (BNL) has developed a unique Free-Air CO2 Enrichment (FACE) system for a cooperative research program sponsored by the U.S. Department of Energy and U.S. Department of Agriculture, currently operating as the FACE User Facility at the Maricopa Agricultural Center (MAC) of the University of Arizona. The BNL FACE system is a tool for studying the effects of CO2 enrichment on vegetation and natural ecosystems, and the exchange of carbon between the biosphere and the atmosphere, in open-air settings without any containment. The FACE system provides stable control of CO2 at 550 ppm +/- 10%, based on 1-min averages, over 90% of the time. In 1990, this level of control was achieved over an area as large as 380 m2, at an annual operating cost of $668 m-2. During two field seasons of enrichment with cotton (Gossypium hirsutum) as the test plant, enrichment to 550 ppm CO2 resulted in significant increases in photosynthesis and biomass of leaves, stems and roots, reduced evapotranspiration, and changes in root morphology. In addition, soil respiration increased and evapotranspiration decreased. RP HENDREY, GR (reprint author), BROOKHAVEN NATL LAB,DIV BIOSYST & PROC SCI,UPTON,NY 11973, USA. NR 20 TC 94 Z9 111 U1 3 U2 17 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0042-3106 J9 VEGETATIO JI Vegetatio PD JAN PY 1993 VL 104 BP 17 EP 31 DI 10.1007/BF00048142 PG 15 WC Plant Sciences; Ecology; Forestry SC Plant Sciences; Environmental Sciences & Ecology; Forestry GA KM790 UT WOS:A1993KM79000004 ER PT J AU LONG, SP BAKER, NR RAINES, CA AF LONG, SP BAKER, NR RAINES, CA TI ANALYZING THE RESPONSES OF PHOTOSYNTHETIC CO2 ASSIMILATION TO LONG-TERM ELEVATION OF ATMOSPHERIC CO2 CONCENTRATION SO VEGETATIO LA English DT Article; Proceedings Paper CT INTERNATIONAL WORKSHOP ON CO2 AND BIOSPHERE CY NOV 15-19, 1991 CL WAGENINGEN, NETHERLANDS SP NETHERLANDS ORG SCI RES, CO2 COMMISS, ROYAL NETHERLANDS ACAD ARTS OF SCI, MINIST HOUSING PHYS PLANNING & ENVIRONM NETHERLANDS, VRIJE UNIV AMSTERDAM, DEPT ECOL & ECOTOXICOL DE GREENHOUSE EFFECT; CHLOROPHYLL FLUORESCENCE; RUBISCO; PHOTOSYSTEM-II; STOMATA; QUANTUM EFFICIENCY ID CHLOROPHYLL FLUORESCENCE; STOMATAL CONDUCTANCE; ABSORBANCE CHANGES; QUANTUM YIELD; RISING CO2; LEAVES; LIGHT; PHOTOINHIBITION; ACCLIMATION; APPARATUS AB Understanding how photosynthetic capacity acclimatises when plants are grown in an atmosphere of rising CO2 concentrations will be vital to the development of mechanistic models of the response of plant productivity to global environmental change. A limitation to the study of acclimatisation is the small amount of material that may be destructively harvested from long-term studies of the effects of elevation of CO2 concentration. Technological developments in the measurement of gas exchange, fluorescence and absorption spectroscopy, coupled with theoretical developments in the interpretation of measured values now allow detailed analyses of limitations to photosynthesis in vivo. The use of leaf chambers with Ulbricht integrating spheres allows separation of change in the maximum efficiency of energy transduction in the assimilation of CO2 from changes in tissue absorptance. Analysis of the response of CO2 assimilation to intercellular CO2 concentration allows quantitative determination of the limitation imposed by stomata, carboxylation efficiency, and the rate of regeneration of ribulose 1:5 bisphosphate. Chlorophyll fluorescence provides a rapid method for detecting photoinhibition in heterogeneously illuminated leaves within canopies in the field. Modulated fluorescence and absorption spectroscopy allow parallel measurements of the efficiency of light utilisation in electron transport through photosystems I and II in situ. C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RP LONG, SP (reprint author), UNIV ESSEX,DEPT BIOL,COLCHESTER CO4 3SQ,ESSEX,ENGLAND. RI Long, Stephen/A-2488-2008 OI Long, Stephen/0000-0002-8501-7164 NR 37 TC 84 Z9 129 U1 2 U2 20 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0042-3106 J9 VEGETATIO JI Vegetatio PD JAN PY 1993 VL 104 BP 33 EP 45 DI 10.1007/BF00048143 PG 13 WC Plant Sciences; Ecology; Forestry SC Plant Sciences; Environmental Sciences & Ecology; Forestry GA KM790 UT WOS:A1993KM79000005 ER PT J AU ROGERS, HH DAHLMAN, RC AF ROGERS, HH DAHLMAN, RC TI CROP RESPONSES TO CO2 ENRICHMENT SO VEGETATIO LA English DT Article; Proceedings Paper CT INTERNATIONAL WORKSHOP ON CO2 AND BIOSPHERE CY NOV 15-19, 1991 CL WAGENINGEN, NETHERLANDS SP NETHERLANDS ORG SCI RES, CO2 COMMISS, ROYAL NETHERLANDS ACAD ARTS OF SCI, MINIST HOUSING PHYS PLANNING & ENVIRONM NETHERLANDS, VRIJE UNIV AMSTERDAM, DEPT ECOL & ECOTOXICOL DE GLOBAL CHANGE; PLANTS; CARBON DIOXIDE; GREENHOUSE EFFECT; ELEVATED CARBON DIOXIDE; EXPOSURE TECHNIQUES ID ELEVATED CARBON-DIOXIDE; WATER-USE EFFICIENCY; INCREASING ATMOSPHERIC CO2; PLANT-GROWTH; AGRICULTURAL PRODUCTIVITY; MINERAL-NUTRITION; AIR-TEMPERATURE; CLIMATIC-CHANGE; SOYBEAN CANOPY; WINTER-WHEAT AB Carbon dioxide is rising in the global atmosphere, and this increase can be expected to continue into the foreseeable future. This compound is an essential input to plant life. Crop function is affected across all scales from biochemical to agro-ecosystem. An array of methods (leaf cuvettes, field chambers, free-air release systems) are available for experimental studies of CO2 effects. Carbon dioxide enrichment of the air in which crops grow usually stimulates their growth and yield. Plant structure and physiology are markedly altered. Interactions between CO2 and environmental factors that influence plants are known to occur. Implications for crop growth and yield are enormous. Strategies designed to assure future global food security must include a consideration of crop responses to elevated atmospheric CO2. Future research should include these targets: search for new insights, development of new techniques, construction of better simulation models, investigation of belowground processes, study of interactions, and the elimination of major discrepancies in the scientific knowledge base. C1 US DOE,DIV ENVIRONM SCI RES,WASHINGTON,DC 20545. AUBURN UNIV,AUBURN,AL 36849. RP ROGERS, HH (reprint author), USDA ARS,NATL SOIL DYNAM LAB,AUBURN,AL 36831, USA. NR 138 TC 133 Z9 146 U1 4 U2 21 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0042-3106 J9 VEGETATIO JI Vegetatio PD JAN PY 1993 VL 104 BP 117 EP 131 DI 10.1007/BF00048148 PG 15 WC Plant Sciences; Ecology; Forestry SC Plant Sciences; Environmental Sciences & Ecology; Forestry GA KM790 UT WOS:A1993KM79000010 ER PT J AU DAHLMAN, RC AF DAHLMAN, RC TI CO2 AND PLANTS - REVISITED SO VEGETATIO LA English DT Article DE CO2 ENRICHMENT; PLANTS; RESEARCH EVALUATION ID ATMOSPHERIC CARBON-DIOXIDE; ELEVATED LEVELS; SHORT-TERM; ENRICHMENT; PHOTOSYNTHESIS; SEEDLINGS; GROWTH; TEMPERATURE; ACCLIMATION; INHIBITION AB The decade-long USA research program on the direct effects of CO2 enrichment on vegetation has achieved important milestones and has produced a number of interesting and exciting findings. Research beginning in 1980 focused on field experiments to determine whether phenomena observed in the laboratory indeed occurred in natural environments. The answer is yes. Data obtained from numerous field studies show mixed response of crop and native species to CO2 enrichment however. Nearly all experiments demonstrate that plants exhibit positive gain when grown at elevated CO2; although the magnitude varies greatly. Most crop responses range from 30 to 50 % increase in yield. Results from long-term experiments with woody species and ecosystems are even more variable. Huge growth responses (100 to nearly 300 % increase relative to controls) are reported from several tree experiments and the salt-marsh ecosystem experiment. Other results from experiments with woody species and the tundra ecosystem suggest little no effect of CO2 on physiology, growth or productivity. Numerous studies of the physiology of the CO2 effect are continuing in attempts to understand controlling mechanisms and to explain the variable growth responses. Particular emphasis needs to be given to physiological measures of interactions involving the CO2 effect and other environmental influences, and to the wide-ranging observations of photosynthesis acclimation to CO2. Prospects for future research are identified. RP DAHLMAN, RC (reprint author), US DOE, DIV ENVIRONM SCI RES, WASHINGTON, DC 20585 USA. NR 44 TC 30 Z9 38 U1 0 U2 3 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0042-3106 J9 VEGETATIO JI Vegetatio PD JAN PY 1993 VL 104 BP 339 EP 355 DI 10.1007/BF00048164 PG 17 WC Plant Sciences; Ecology; Forestry SC Plant Sciences; Environmental Sciences & Ecology; Forestry GA KM790 UT WOS:A1993KM79000026 ER PT B AU TURNER, LR AF TURNER, LR BE Cheng, Z Jiang, K Takahashi, N TI NEW DIRECTIONS FOR THE TEAM WORKSHOPS SO VERIFICATION OF SOFTWARES FOR 3-D ELECTROMAGNETIC FIELD ANALYSIS: PROCEEDINGS LA English DT Proceedings Paper CT Asian TEAM Workshop: Verification of Softwares for 3-D Electromagnetic Field Analysis CY OCT 18-19, 1992 CL THOUSAND ISL LAKE, PEOPLES R CHINA SP CHINESE ELECTROTECH SOC, ZHEJIANG UNIV, NATL NAT SCI FDN CHINA C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT ACADEMIC PUBL PI BEIJING PA 137 CHAONEI DAJIE, BEIJING 100010, PEOPLES R CHINA BN 7-80003-263-2 PY 1993 BP 6 EP 15 PG 10 WC Computer Science, Software Engineering; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BZ42K UT WOS:A1993BZ42K00002 ER PT B AU NOVAK, JL SCHMITT, DJ MASLAKOWSKI, J AF NOVAK, JL SCHMITT, DJ MASLAKOWSKI, J BE Breidenthal, SS Desrochers, AA TI MULTIAXIS SEAM TRACKING USING A NONCONTACT CAPACITIVE SENSOR SO VISION, SENSORS, AND CONTROL FOR AUTOMATED MANUFACTURING SYSTEMS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Vision, Sensors, and Control for Automated Manufacturing Systems CY SEP 09-10, 1993 CL BOSTON, MA SP SOC PHOTO OPT INSTRUMENTAT ENGINEERS, AUTOMATED IMAGING ASSOC, CARNEGIE MELLON UNIV, CTR EXCELLENCE OPT DATA PROC, UNIV CONNECTICUT, ADV TECHNOL CTR PRECIS MFG, INT SOC PHOTOGRAMMETRY & REMOTE SENSING C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPIE - INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 BN 0-8194-1328-3 J9 P SOC PHOTO-OPT INS PY 1993 VL 2063 BP 163 EP 168 DI 10.1117/12.164965 PG 6 WC Automation & Control Systems; Engineering, Manufacturing; Optics SC Automation & Control Systems; Engineering; Optics GA BZ74L UT WOS:A1993BZ74L00016 ER PT B AU MAX, N BECKER, B CRAWFIS, R AF MAX, N BECKER, B CRAWFIS, R BE Nielson, GM Bergeron, D TI FLOW VOLUMES FOR INTERACTIVE VECTOR FIELD VISUALIZATION SO VISUALIZATION 93, PROCEEDINGS LA English DT Proceedings Paper CT Visualization 93, the 4th Annual IEEE Conference on Visualization CY OCT 25-29, 1993 CL SAN JOSE, CA SP IEEE, COMP SOC, TECH COMM COMP GRAPH, ACM, SIGGRAPH C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. NR 0 TC 24 Z9 24 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-3940-7 PY 1993 BP 19 EP & PG 0 WC Computer Science, Software Engineering; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BZ58G UT WOS:A1993BZ58G00002 ER PT B AU HINKER, P HANSEN, C AF HINKER, P HANSEN, C BE Nielson, GM Bergeron, D TI GEOMETRIC OPTIMIZATION SO VISUALIZATION 93, PROCEEDINGS LA English DT Proceedings Paper CT Visualization 93, the 4th Annual IEEE Conference on Visualization CY OCT 25-29, 1993 CL SAN JOSE, CA SP IEEE, COMP SOC, TECH COMM COMP GRAPH, ACM, SIGGRAPH C1 LOS ALAMOS NATL LAB,ADV COMP LAB,LOS ALAMOS,NM 87545. NR 0 TC 1 Z9 2 U1 0 U2 1 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-3940-7 PY 1993 BP 189 EP & PG 0 WC Computer Science, Software Engineering; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BZ58G UT WOS:A1993BZ58G00024 ER PT B AU SPRINGMEYER, RR AF SPRINGMEYER, RR BE Nielson, GM Bergeron, D TI APPLYING OBSERVATIONS OF WORK ACTIVITY IN DESIGNING PROTOTYPE DATA-ANALYSIS TOOLS SO VISUALIZATION 93, PROCEEDINGS LA English DT Proceedings Paper CT Visualization 93, the 4th Annual IEEE Conference on Visualization CY OCT 25-29, 1993 CL SAN JOSE, CA SP IEEE, COMP SOC, TECH COMM COMP GRAPH, ACM, SIGGRAPH C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-3940-7 PY 1993 BP 228 EP & PG 0 WC Computer Science, Software Engineering; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BZ58G UT WOS:A1993BZ58G00029 ER PT B AU CRAWFIS, RA MAX, N AF CRAWFIS, RA MAX, N BE Nielson, GM Bergeron, D TI TEXTURE SPLATS FOR 3D SCALAR AND VECTOR FIELD VISUALIZATION SO VISUALIZATION 93, PROCEEDINGS LA English DT Proceedings Paper CT Visualization 93, the 4th Annual IEEE Conference on Visualization CY OCT 25-29, 1993 CL SAN JOSE, CA SP IEEE, COMP SOC, TECH COMM COMP GRAPH, ACM, SIGGRAPH C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. NR 0 TC 9 Z9 9 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-3940-7 PY 1993 BP 261 EP & PG 0 WC Computer Science, Software Engineering; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BZ58G UT WOS:A1993BZ58G00033 ER PT B AU RANKEN, D GEORGE, J AF RANKEN, D GEORGE, J BE Nielson, GM Bergeron, D TI MRIVIEW - AN INTERACTIVE COMPUTATIONAL TOOL FOR INVESTIGATION OF BRAIN STRUCTURE AND FUNCTION SO VISUALIZATION 93, PROCEEDINGS LA English DT Proceedings Paper CT Visualization 93, the 4th Annual IEEE Conference on Visualization CY OCT 25-29, 1993 CL SAN JOSE, CA SP IEEE, COMP SOC, TECH COMM COMP GRAPH, ACM, SIGGRAPH C1 LOS ALAMOS NATL LAB,BIOPHYS GRP,LOS ALAMOS,NM 87545. NR 0 TC 7 Z9 7 U1 0 U2 0 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-3940-7 PY 1993 BP 324 EP & PG 0 WC Computer Science, Software Engineering; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BZ58G UT WOS:A1993BZ58G00041 ER PT B AU BUTLER, DM ALMOND, JC BERGERON, RD BRODLIE, KW HABER, RB AF BUTLER, DM ALMOND, JC BERGERON, RD BRODLIE, KW HABER, RB BE Nielson, GM Bergeron, D TI VISUALIZATION REFERENCE MODELS SO VISUALIZATION 93, PROCEEDINGS LA English DT Proceedings Paper CT Visualization 93, the 4th Annual IEEE Conference on Visualization CY OCT 25-29, 1993 CL SAN JOSE, CA SP IEEE, COMP SOC, TECH COMM COMP GRAPH, ACM, SIGGRAPH C1 LIMIT POINT SYST INC,SANDIA NATL LABS,LIVERMORE,CA 94550. RI Haber, Robert/A-8199-2014 OI Haber, Robert/0000-0001-8471-8180 NR 0 TC 4 Z9 4 U1 0 U2 1 PU I E E E, COMPUTER SOC PRESS PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, LOS ALAMITOS, CA 90720 BN 0-8186-3940-7 PY 1993 BP 337 EP 342 PG 6 WC Computer Science, Software Engineering; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BZ58G UT WOS:A1993BZ58G00043 ER PT S AU ROSE, KA COWAN, JH HOUDE, ED COUTANT, CC AF ROSE, KA COWAN, JH HOUDE, ED COUTANT, CC BE Fuiman, LA TI INDIVIDUAL-BASED MODELING OF ENVIRONMENTAL-QUALITY EFFECTS ON EARLY-LIFE STAGES OF FISHES - A CASE-STUDY USING STRIPED BASS SO WATER QUALITY AND THE EARLY LIFE STAGES OF FISHES SE AMERICAN FISHERIES SOCIETY SYMPOSIUM SERIES LA English DT Proceedings Paper CT 16th Annual Larval Fish Conference on Environmental Quality and the Early Life Stages of Fishes CY JUN 16-20, 1992 CL KINGSTON, RI SP UNIV RHODE ISLAND C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RI Houde, Edward/D-8498-2012 NR 0 TC 27 Z9 28 U1 0 U2 0 PU AMER FISHERIES SOC PI BETHESDA PA 5410 GROSVENOR LANE, STE 110, BETHESDA, MD 20814-2199 SN 0892-2284 BN 0-913235-86-5 J9 AM FISH S S PY 1993 VL 14 BP 125 EP 145 PG 21 WC Fisheries; Marine & Freshwater Biology; Oceanography SC Fisheries; Marine & Freshwater Biology; Oceanography GA BZ63H UT WOS:A1993BZ63H00013 ER PT J AU RAMIREZ, A DAILY, W LABRECQUE, D OWEN, E CHESNUT, D AF RAMIREZ, A DAILY, W LABRECQUE, D OWEN, E CHESNUT, D TI MONITORING AN UNDERGROUND STEAM INJECTION PROCESS USING ELECTRICAL-RESISTANCE TOMOGRAPHY SO WATER RESOURCES RESEARCH LA English DT Article ID IMPEDANCE-COMPUTED-TOMOGRAPHY AB We used electrical resistance tomography (ERT) to map the subsurface distribution of a steam flood as a function of time as part of a prototype environmental restoration process performed by the Dynamic Underground Stripping Project. We evaluated the capability of ERT to monitor changes in the soil resistivity during the steam injection process using a dipole-dipole measurement technique to measure the bulk electrical resistivity distribution in the soil mass. The injected steam caused changes in the soil's resistivity because the steam displaced some of the native pore water, increased the pore water and soil temperatures and changed the ionic content of the pore water. We could detect the effects of steam invasion by mapping changes in the soil resistivity as a function of space and time. The ERT tomographs are compared with induction well logs, formation temperature logs and lithologic logs. These comparisons suggest that the ERT tomographs mapped the formation regions invaded by the steam flood. The data also suggest that steam invasion was limited in vertical extent to a gravel horizon at depth of approximately 43 m. The tomographs show that with time, the steam invasion zone extended laterally to all areas monitored by the ERT technique. C1 UNIV ARIZONA,DEPT MIN & GEOL ENGN,TUCSON,AZ 85721. RP RAMIREZ, A (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 29 TC 108 Z9 113 U1 3 U2 13 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD JAN PY 1993 VL 29 IS 1 BP 73 EP 87 DI 10.1029/92WR01608 PG 15 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA KG914 UT WOS:A1993KG91400005 ER PT J AU NARASIMHAN, TN ZHU, M AF NARASIMHAN, TN ZHU, M TI TRANSIENT FLOW OF WATER TO A WELL IN AN UNCONFINED AQUIFER - APPLICABILITY OF SOME CONCEPTUAL MODELS SO WATER RESOURCES RESEARCH LA English DT Article ID POROUS-MEDIA; LAYERS AB Currently available methods for interpreting data from unconfined aquifers are based on analytical solutions which restrict attention to flow in the saturated zone and account for drainage of water from the unsaturated zone through a source term. The parameter, specific yield (S(y)), is assumed to dictate the total quantity of water that is derivable through the desaturation process. It is commonly assumed that flow in the unsaturated zone has little effect on flow in the saturated zone and therefore that all the drainable water is instantly delivered at the water table as it declines in response to pumping. In a model proposed in 1954, Boulton empirically assumed that the drainable water associated with S(y) is released gradually at the water table as an exponential function of time. This concept of Boulton is similar to the notion of first-order kinetics frequently used to handle chemical transformations. Boulton's model is considered by some to have no physical basis. Numerical experiments performed on sand columns with reasonable properties suggest that vertical drainage of water at the water table due to a falling water table is a time-dependent process which is mathematically more complex than a simple exponential relation. Although Boulton did not provide a rational physical explanation, his exponential assumption has some merit in that it implicitly provides for a time dependent drainage process which seems to occur in the unsaturated zone. However, the simple exponential approximation is not adequate to account for what is seemingly a complex process. It appears that a physically comprehensive model of radial flow in an unconfined aquifer will combine time-dependent drainage from above the water table with vertical components of flow in the saturated zone. An additional assumption frequently made is that the well can be treated as a line source. Results from numerical experiments suggest that caution is in order before neglecting effects of well-bore storage in interpreting data from tests on unconfined aquifers. C1 LAWRENCE BERKELEY LAB, DIV EARTH SCI, BERKELEY, CA 94720 USA. RP UNIV CALIF BERKELEY, DEPT MAT SCI & MINERAL ENGN, HEARST MINING BLDG, BERKELEY, CA 94720 USA. NR 30 TC 47 Z9 48 U1 1 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0043-1397 EI 1944-7973 J9 WATER RESOUR RES JI Water Resour. Res. PD JAN PY 1993 VL 29 IS 1 BP 179 EP 191 DI 10.1029/92WR01959 PG 13 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA KG914 UT WOS:A1993KG91400014 ER PT J AU ROSE, KA BRENKERT, AL SCHOHL, GA ONISHI, Y HAYWORTH, JS HOLLY, F PERKINS, W BEARD, L COOK, RB WALDROP, W AF ROSE, KA BRENKERT, AL SCHOHL, GA ONISHI, Y HAYWORTH, JS HOLLY, F PERKINS, W BEARD, L COOK, RB WALDROP, W TI MULTIPLE MODEL ANALYSIS OF SEDIMENT TRANSPORT AND CONTAMINANT DISTRIBUTION IN THE CLINCH RIVER WATTS BAR RESERVOIR, TENNESSEE, USA SO WATER SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 1st International Specialized Conference on Contaminated Aquatic Sediments: Historical Records, Environmental Impact, and Remediation CY JUN 14-16, 1993 CL MILWAUKEE, WI DE SEDIMENT TRANSPORT; CONTAMINANT FATE; MULTIPLE COMPUTER MODELS; RADIOACTIVE CESIUM; RESERVOIR; COHESIVE SEDIMENTS; PREDICTION UNCERTAINTY ID WATERSHED ACIDIFICATION MODELS; ILWAS AB Three models of sediment transport and contaminant distribution (CHARIMA, HEC-6, and TODAM) are being applied to the Clinch River/Watts Bar Reservoir system as part of a CERCLA remedial investigation. Planned uses of model results are to identify high deposition areas of the river, forecast the effects of various remedial actions and climatic events on contaminant distribution, and aid in the design of future data collection efforts. The three models share some similarities but also differ in several important details. All three models are one-dimensional and include similar processes for sediment deposition and resuspension. Differences among the models include steady-state versus unsteady flow, the complexity of the channel network permitted, and the level of detail of contaminant-related fate processes represented. As part of our multiple model strategy, some aspects of the three models are configured using common information on the system (e.g., spatial geometry), while other aspects of the models, including some modeler decisions and calibration methods, are allowed to differ. Comparison of results among the three models can lead to increased confidence in predictions and in recommendations for future data collection. The general approach of using multiple models is described and preliminary results of the Clinch River/Watts Bar application are presented to illustrate the utility of using a multiple model approach for complex environmental assessments. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. TENNESSEE VALLEY AUTHOR, ENGN LAB, NORRIS, TN 37828 USA. UNIV IOWA, IOWA INST HYDRAUL RES, IOWA CITY, IA 52242 USA. RP ROSE, KA (reprint author), OAK RIDGE NATL LAB, DIV ENVIRONM SCI, POB 2008, OAK RIDGE, TN 37831 USA. OI Cook, Robert/0000-0001-7393-7302 NR 26 TC 3 Z9 3 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1223 J9 WATER SCI TECHNOL JI Water Sci. Technol. PY 1993 VL 28 IS 8-9 BP 65 EP 78 PG 14 WC Engineering, Environmental; Environmental Sciences; Water Resources SC Engineering; Environmental Sciences & Ecology; Water Resources GA ND452 UT WOS:A1993ND45200009 ER PT J AU MATISOFF, G HOLDREN, GR AF MATISOFF, G HOLDREN, GR TI HISTORICAL LOADING RECORD OF A POST-DEPOSITIONALLY REACTIVE SUBSTANCE - A MODEL FOR SULFUR IN AN ADIRONDACK LAKE SO WATER SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 1st International Specialized Conference on Contaminated Aquatic Sediments: Historical Records, Environmental Impact, and Remediation CY JUN 14-16, 1993 CL MILWAUKEE, WI DE SULFUR; SEDIMENTS; ACID LAKE; MATHEMATICAL MODEL; HISTORICAL LOADING; PALEOLIMNOLOGY; NON-STEADY-STATE DIAGENESIS; ADIRONDACK ID ALKALINITY GENERATION; SULFATE REDUCTION; SEDIMENTS; WATER; ACIDIFICATION; DIFFUSION AB A model for the distribution of sulfur in the sediments of a lake in the Adirondack Mountains, New York State, is developed to gain insight into the timing and magnitude of anthropogenic increases in sulfur loading. Surficial sulfur concentrations an about 3500 mug/g, increase to 6000-7000 mug/g at a depth of about 6 cm, and then decrease downcore to background levels of about 2500 mug/g. Sulfate concentrations are about 60-80 muM in the overlying water and decrease rapidly below the sediment water interface. This reflects assimilation and/or dissimilatory reduction of sulfate into the solid phase fractions of the sediment. A mathematical model is constructed assuming sulfur is incorporated into sediments by burial of detrital organic matter and by diffusion with subsequent fixation of sulfate from the overlying water. Several historical scenarios of atmospheric sulfate loading rates were used as model boundary conditions. Model results are compared with observed sedimentary sulfur profiles. The observed sediment sulfur profiles are best described using model boundary conditions showing increases in lake water sulfate concentrations, and thus presumably in atmospheric deposition, within last 50-60 years. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP MATISOFF, G (reprint author), CASE WESTERN RESERVE UNIV, DEPT GEOL SCI, CLEVELAND, OH 44106 USA. NR 32 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1223 J9 WATER SCI TECHNOL JI Water Sci. Technol. PY 1993 VL 28 IS 8-9 BP 359 EP 367 PG 9 WC Engineering, Environmental; Environmental Sciences; Water Resources SC Engineering; Environmental Sciences & Ecology; Water Resources GA ND452 UT WOS:A1993ND45200038 ER PT B AU DONG, DW CHAN, YD AF DONG, DW CHAN, YD GP INT NEURAL NETWORK SOC TI 3 LAYER NETWORK FOR IDENTIFYING CHERENKOV RADIATION-PATTERNS SO WCNN'93 - PORTLAND, WORLD CONGRESS ON NEURAL NETWORKS, VOL I LA English DT Proceedings Paper CT World Congress on Neural Networks (WCNN 93, Portland) CY JUL 11-15, 1993 CL PORTLAND, OR SP INT NEURAL NETWORK SOC C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LAWRENCE ERLBAUM ASSOC PUBL PI MAHWAH PA 10 INDUSTRIAL AVE, MAHWAH, NJ 07430 BN 0-8058-1497-3 PY 1993 BP 312 EP 315 PG 4 WC Computer Science, Artificial Intelligence; Neurosciences SC Computer Science; Neurosciences & Neurology GA BA45U UT WOS:A1993BA45U00074 ER PT B AU JOHNSON, JA SMARTT, HB AF JOHNSON, JA SMARTT, HB GP INT NEURAL NETWORK SOC TI FUZZY-LOGIC AND THE ASSOCIATIVE SEARCH ELEMENT SO WCNN'93 - PORTLAND, WORLD CONGRESS ON NEURAL NETWORKS, VOL II LA English DT Proceedings Paper CT World Congress on Neural Networks (WCNN 93, Portland) CY JUL 11-15, 1993 CL PORTLAND, OR SP INT NEURAL NETWORK SOC C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LAWRENCE ERLBAUM ASSOC PUBL PI MAHWAH PA 10 INDUSTRIAL AVE, MAHWAH, NJ 07430 BN 0-8058-1497-3 PY 1993 BP 52 EP 55 PG 4 WC Computer Science, Artificial Intelligence; Neurosciences SC Computer Science; Neurosciences & Neurology GA BA45V UT WOS:A1993BA45V00011 ER PT B AU DONG, DW AF DONG, DW GP INT NEURAL NETWORK SOC TI ANTI-HEBBIAN DYNAMICS AND TOTAL RECALL OF ASSOCIATIVE MEMORY SO WCNN'93 - PORTLAND, WORLD CONGRESS ON NEURAL NETWORKS, VOL II LA English DT Proceedings Paper CT World Congress on Neural Networks (WCNN 93, Portland) CY JUL 11-15, 1993 CL PORTLAND, OR SP INT NEURAL NETWORK SOC C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LAWRENCE ERLBAUM ASSOC PUBL PI MAHWAH PA 10 INDUSTRIAL AVE, MAHWAH, NJ 07430 BN 0-8058-1497-3 PY 1993 BP 275 EP 279 PG 5 WC Computer Science, Artificial Intelligence; Neurosciences SC Computer Science; Neurosciences & Neurology GA BA45V UT WOS:A1993BA45V00061 ER PT B AU SHAO, JQ LEE, YC JONES, R AF SHAO, JQ LEE, YC JONES, R GP INT NEURAL NETWORK SOC TI ORTHOGONAL PROJECTION METHOD FOR FAST ONLINE LEARNING ALGORITHM OF RADIAL BASIS FUNCTION NEURAL NETWORKS SO WCNN'93 - PORTLAND, WORLD CONGRESS ON NEURAL NETWORKS, VOL III LA English DT Proceedings Paper CT World Congress on Neural Networks (WCNN 93, Portland) CY JUL 11-15, 1993 CL PORTLAND, OR SP INT NEURAL NETWORK SOC C1 LOS ALAMOS NATL LAB,DIV APPL THEORET PHYS,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LAWRENCE ERLBAUM ASSOC PUBL PI MAHWAH PA 10 INDUSTRIAL AVE, MAHWAH, NJ 07430 BN 0-8058-1497-3 PY 1993 BP 520 EP 535 PG 16 WC Computer Science, Artificial Intelligence; Neurosciences SC Computer Science; Neurosciences & Neurology GA BA45W UT WOS:A1993BA45W00114 ER PT B AU KOCH, MW MOYA, MM AF KOCH, MW MOYA, MM GP INT NEURAL NETWORK SOC TI DETECTING RESIDUE ON A PRINTED-CIRCUIT BOARD - AN APPLICATION OF THE BOUNDARY CONTOUR FEATURE CONTOUR SYSTEM SO WCNN'93 - PORTLAND, WORLD CONGRESS ON NEURAL NETWORKS, VOL III LA English DT Proceedings Paper CT World Congress on Neural Networks (WCNN 93, Portland) CY JUL 11-15, 1993 CL PORTLAND, OR SP INT NEURAL NETWORK SOC C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LAWRENCE ERLBAUM ASSOC PUBL PI MAHWAH PA 10 INDUSTRIAL AVE, MAHWAH, NJ 07430 BN 0-8058-1497-3 PY 1993 BP 789 EP 792 PG 4 WC Computer Science, Artificial Intelligence; Neurosciences SC Computer Science; Neurosciences & Neurology GA BA45W UT WOS:A1993BA45W00169 ER PT B AU MOYA, MM KOCH, MW HOSTETLER, LD AF MOYA, MM KOCH, MW HOSTETLER, LD GP INT NEURAL NETWORK SOC TI ONE-CLASS CLASSIFIER NETWORKS FOR TARGET RECOGNITION APPLICATIONS SO WCNN'93 - PORTLAND, WORLD CONGRESS ON NEURAL NETWORKS, VOL III LA English DT Proceedings Paper CT World Congress on Neural Networks (WCNN 93, Portland) CY JUL 11-15, 1993 CL PORTLAND, OR SP INT NEURAL NETWORK SOC C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 30 Z9 31 U1 0 U2 2 PU LAWRENCE ERLBAUM ASSOC PUBL PI MAHWAH PA 10 INDUSTRIAL AVE, MAHWAH, NJ 07430 BN 0-8058-1497-3 PY 1993 BP 797 EP 801 PG 5 WC Computer Science, Artificial Intelligence; Neurosciences SC Computer Science; Neurosciences & Neurology GA BA45W UT WOS:A1993BA45W00171 ER PT B AU GOULDING, JR AF GOULDING, JR GP INT NEURAL NETWORK SOC TI ADAPTIVE TRANSFER-FUNCTION NETWORKS SO WCNN'93 - PORTLAND, WORLD CONGRESS ON NEURAL NETWORKS, VOL IV LA English DT Proceedings Paper CT World Congress on Neural Networks (WCNN 93, Portland) CY JUL 11-15, 1993 CL PORTLAND, OR SP INT NEURAL NETWORK SOC C1 LOS ALAMOS NATL LAB,X1 GRP,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LAWRENCE ERLBAUM ASSOC PUBL PI MAHWAH PA 10 INDUSTRIAL AVE, MAHWAH, NJ 07430 BN 0-8058-1497-3 PY 1993 BP 700 EP 704 PG 5 WC Computer Science, Artificial Intelligence; Neurosciences; Physics, Mathematical SC Computer Science; Neurosciences & Neurology; Physics GA BA45X UT WOS:A1993BA45X00151 ER PT B AU KELLER, PE GMITRO, AF AF KELLER, PE GMITRO, AF GP INT NEURAL NETWORK SOC TI OPERATIONAL PARAMETERS OF AN OPTOELECTRONIC NEURAL-NETWORK EMPLOYING FIXED PLANAR HOLOGRAPHIC INTERCONNECTS SO WCNN'93 - PORTLAND, WORLD CONGRESS ON NEURAL NETWORKS, VOL IV LA English DT Proceedings Paper CT World Congress on Neural Networks (WCNN 93, Portland) CY JUL 11-15, 1993 CL PORTLAND, OR SP INT NEURAL NETWORK SOC C1 BATTELLE MEM INST,PACIFIC NW LABS,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LAWRENCE ERLBAUM ASSOC PUBL PI MAHWAH PA 10 INDUSTRIAL AVE, MAHWAH, NJ 07430 BN 0-8058-1497-3 PY 1993 BP 799 EP 802 PG 4 WC Computer Science, Artificial Intelligence; Neurosciences; Physics, Mathematical SC Computer Science; Neurosciences & Neurology; Physics GA BA45X UT WOS:A1993BA45X00170 ER PT J AU SCHIPPER, L AF SCHIPPER, L TI ENERGY EFFICIENCY - LESSONS FROM THE PAST AND STRATEGIES FOR THE FUTURE SO WORLD BANK ECONOMIC REVIEW LA English DT Article; Proceedings Paper CT 5th World-Bank Annual Conference on Development Economics CY MAY 03-04, 1993 CL WASHINGTON, DC SP WORLD BANK ID OECD AB In the next century, strategies to encourage energy efficiency could moderate environmental problems while saving energy, in spite of the enormous potential for growth in the world demand for energy. After describing the energy problem, this paper reviews trends in energy use and energy intensities in the 1970s and 1980s in the industrial countries, the former planned economies of Eastern Europe and the U.S.S.R., and the developing countries. Lessons from those years are used to frame policies that could improve levels of efficiency in all these countries. Estimates of future prospects for more efficient energy use in the year 2010 under various scenarios show the possibilities for further improvement. RP SCHIPPER, L (reprint author), LAWRENCE BERKELEY LAB,INT ENERGY STUDIES GRP,BERKELEY,CA 94720, USA. NR 35 TC 1 Z9 1 U1 0 U2 0 PU WORLD BANK PUBLICATIONS PI WASHINGTON PA 1818 H STREET, NW ROOM J1085 ATTN: SANDY KEOWEN, WASHINGTON, DC 20433 SN 0258-6770 J9 WORLD BANK ECON REV JI World Bank Econ. Rev. PY 1993 SU S BP 397 EP 427 PG 31 WC Business, Finance; Economics; Planning & Development SC Business & Economics; Public Administration GA NF355 UT WOS:A1993NF35500041 ER PT B AU DUDEK, FJ DANIELS, EJ MORGAN, WA AF DUDEK, FJ DANIELS, EJ MORGAN, WA BE MATTHEW, IG TI RECYCLING GALVANIZED STEEL - OPERATING EXPERIENCE AND BENEFITS SO WORLD ZINC '93: PROCEEDINGS OF THE INTERNATIONAL SYMPOSIUM ON ZINC SE AUSTRALASIAN INSTITUTE OF MINING AND METALLURGY PUBLICATION SERIES LA English DT Proceedings Paper CT International Symposium on Zinc: World Zinc 1993 CY OCT 10-13, 1993 CL HOBART, AUSTRALIA SP AUSTRALASIAN INST MIN & MET, CANADIAN INST MIN MET & PETR, INST MIN & MET, MIN & MAT PROC INST JAPAN, MINERALS MET & MAT SOC C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AUSTRALASIAN INST MINING & METALLURGY PI PARKVILLE VICTORIA PA CLUNIES ROSS HOUSE 191 ROYAL PARADE, PARKVILLE VICTORIA 3052, AUSTRALIA BN 0-949106-92-5 J9 AUSTRALAS I MIN MET PY 1993 VL 93 IS 7 BP 515 EP 522 PG 8 WC Geology SC Geology GA BZ86Y UT WOS:A1993BZ86Y00064 ER PT S AU PENNYCOOK, SJ JESSON, DE CHISHOLM, MF BROWNING, ND AF PENNYCOOK, SJ JESSON, DE CHISHOLM, MF BROWNING, ND BE Kenway, PB Duke, PJ Lorimer, GW Mulvey, T Drummond, IW Love, G Michette, AG Stedman, M TI ATOMIC-RESOLUTION IMAGING AND ANALYSIS WITH THE STEM SO X-RAY OPTICS AND MICROANALYSIS 1992 SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Proceedings Paper CT 13TH INTERNATIONAL CONGRESS ON X-RAY OPTICS AND MICROANALYSIS 1992 ( 13 ICXOM ) CY AUG 31-SEP 04, 1992 CL UNIV MANCHESTER INST SCI & TECHNOL, MANCHESTER, ENGLAND SP ROYAL SOC, INST PHYS, ROYAL MICROSCOPICAL SOC, IMPERIAL CHEM IND, B P INT, WEIR MAT, UNILEVER HO UNIV MANCHESTER INST SCI & TECHNOL RP PENNYCOOK, SJ (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831, USA. NR 0 TC 0 Z9 0 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA BRISTOL SN 0951-3248 BN 0-7503-0255-0 J9 INST PHYS CONF SER PY 1993 VL 130 BP 217 EP 224 PG 8 WC Materials Science, Ceramics; Microscopy; Optics SC Materials Science; Microscopy; Optics GA BY75P UT WOS:A1993BY75P00044 ER PT J AU GIAUQUE, RD ASARO, F STROSS, FH HESTER, TR AF GIAUQUE, RD ASARO, F STROSS, FH HESTER, TR TI HIGH-PRECISION NONDESTRUCTIVE X-RAY-FLUORESCENCE METHOD APPLICABLE TO ESTABLISHING THE PROVENANCE OF OBSIDIAN ARTIFACTS SO X-RAY SPECTROMETRY LA English DT Article ID GUATEMALA AB A high-precision, non-destructuve x-ray fluorescence (XRF) method has been developed for the determination of both trace and major elements in obsidian archaeological artifacts. Other than brushing the artifact surface clean, no sample preparation is required. The method developed proves XRF to be an extremely valuable technique for the analysis of archaeological obsidian samples which cannot be destroyed or altered because of their importance for historical studies. The method is applicable to both thick and thin samples which have wide variations in size and shapes. The method has been used to establish the provenance of a number of obsidian artifacts. The results ascertained for groups of samples from three provenances are discussed in this paper. The concentrations of thirteen trace (Ti, Mn, Zn, Ga, As, Rb, Sr, Y, Zr, Nb, Ba, Pb and Th) and three major (K, Ca and Fe) elements were determined from one x-ray spectrum which was acquired during a 1000 s counting interval. The concentrations of the six most precisely measured elements (Fe, Rb, Sr, Y, Zr and Ba) yielded precisions which averaged 2.3%. The mean concentrations determined for five of these elements (excluding Y) differed on average by only 2.0% from published values which were ascertained by neutron activation analysis and XRF. The average standard deviations realized for the other ten elements determined was ca. 7%. C1 UNIV TEXAS,TEXAS ARCHAEOL RES LAB,AUSTIN,TX 78712. RP GIAUQUE, RD (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 36 TC 23 Z9 23 U1 1 U2 2 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0049-8246 J9 X-RAY SPECTROM JI X-Ray Spectrom. PD JAN-FEB PY 1993 VL 22 IS 1 BP 44 EP 53 DI 10.1002/xrs.1300220111 PG 10 WC Spectroscopy SC Spectroscopy GA KJ580 UT WOS:A1993KJ58000009 ER PT J AU SEVOV, SC CORBETT, JD AF SEVOV, SC CORBETT, JD TI SYNTHESIS, CHARACTERIZATION, AND BONDING OF INDIUM CLUSTERS - RB2IN3, A ZINTL PHASE WITH LAYERS OF CLOSO-INDIUM OCTAHEDRA SO ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE LA English DT Article DE CRYSTAL STRUCTURE; RB2IN3; RBIN4; CLUSTER NETWORK; SYNTHESIS; BONDING ID ALKALI-METALS AB The Rb-In system contains only RbIn4 (BaAl4 type) and Rb2In3 in the 0-80 at.% In region. The structure of Rb2In, consists of rubidium ions between layers of closo-In6 clusters joined into sheets through exo bonds at four coplanar vertices (14/mmm, a = 6.8735 (4) angstrom, c = 15.899 (1) angstrom, R(F)/R(w) = 3.2/3.5%). The phase is isostructural with Cs2In3 when a probable error in the earlier space group assignment is corrected. Rb2In, is a poor conductor (p > 10(3)muohm . cm) with a temperature-independent magnetic susceptibility of (0 +/- 4) x 10(-6) emu/mol after core and orbital corrections. The corresponding Zintl phase (closed shell configuration) predicted on the basis of conventional electron counting for the cluster network is supported by extended-Huckel MO calculations. The structures of Rb4In6 and ln4Rb show a close, inverse relationship in the same space group. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 23 TC 27 Z9 27 U1 0 U2 2 PU JOHANN AMBROSIUS BARTH VERLAG PI HEIDELBERG PA IM WEIHER 10, D-69121 HEIDELBERG, GERMANY SN 0044-2313 J9 Z ANORG ALLG CHEM JI Z. Anorg. Allg. Chem. PD JAN PY 1993 VL 619 IS 1 BP 128 EP 132 PG 5 WC Chemistry, Inorganic & Nuclear SC Chemistry GA KJ299 UT WOS:A1993KJ29900019 ER PT J AU GHOSE, S MCMULLAN, RK WEBER, HP AF GHOSE, S MCMULLAN, RK WEBER, HP TI NEUTRON-DIFFRACTION STUDIES OF THE P(1)OVER-BAR-]I(1)OVER-BAR TRANSITION IN ANORTHITE, CAAL2SI2O8, AND THE CRYSTAL-STRUCTURE OF THE BODY-CENTERED PHASE AT 514-K SO ZEITSCHRIFT FUR KRISTALLOGRAPHIE LA English DT Article DE ANORTHITE; CAAL2SI2O8; PHASE TRANSITION; ANHARMONIC TEMPERATURE FACTORS; DYNAMIC DISORDER; FRAMEWORK SILICATE ID DYNAMICAL MODEL; LOW ALBITE; X-RAY; THERMODYNAMICS; TEMPERATURE; REFINEMENT AB The crystal structure of anorthite, CaAl2Si2O8 (Val di Fassa, Monzoni, Italy, An, 100%) has been refined by full-matrix least-squares methods using single-crystal neutron diffraction data (sintheta/lambda less-than-or-equal-to 0.78 angstrom-1) measured at 514 K. Crystal data: triclinic, space group I1BAR (assumed), Z = 8, a = 8.194(1), b = 12.878(4), c = 14.171(6) angstrom; alpha = 93.07(2), beta = 115.07(2), gamma = 91.47(2)-degrees, V = 1343.6 angstrom3, mu(n) = 4.2 x 10(-3) cm-1, F(000) = 532.16 fm, lambda = 1.0462(1) angstrom. R(F2) = 0.049, wR(F) = 0.068, S = 1.27 for 5098 reflections and 293 parameters, including 40 third-order thermal tensor coefficients for four oxygen atoms. The aluminosilicate framework is virtually body-centered, whereas the Ca atoms occur in split-positions with unequal site occupancies. The eight tetrahedral sites show complete Al/Si ordering based on refined scattering-lengths values. The 16 distinct Si-O and [Al-O] bonds (e.s.d.'s, 0.001 angstrom) have average values of 1.617 +/- 0.031 angstrom and [1.741 +/- 0.029 angstrom]. The O-Si-O and [O-Al-O] angles are in the ranges 101.44(6)-117.60(7)-degrees and [97.87(7)-119.01(7)] and have averages of 109.42 and [109.31-degrees]. The unique Si-O-Al angles are between extremes 124.16(6) and 154.7(2)-degrees. The two non-equivalent Ca atoms occupy statistically two sites with respective separations, 0.834(5), 0.494(5) angstrom, and weights equal 2/3, 1/3 within limits of the analysis. These results are interpreted in terms of a dynamical model in which the I1BAR phase is a statistical dynamical average of small mobile P1BAR domains. The unequal Ca occupancy in the split positions results from the persistence of considerable short-range order near T(c). Significant anharmonic thermal vibrations of some of the oxygen atoms are attributed to critical fluctuations associated with the phase transition near T(c). C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. UNIV LAUSANNE,INST CRISTALLOG,CH-1015 LAUSANNE,SWITZERLAND. RP GHOSE, S (reprint author), UNIV WASHINGTON,DEPT GEOL SCI,MINERAL PHYS GRP,SEATTLE,WA 98195, USA. NR 46 TC 24 Z9 25 U1 1 U2 6 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0044-2968 J9 Z KRISTALLOGR JI Z. Kristall. PY 1993 VL 204 BP 215 EP 237 DI 10.1524/zkri.1993.204.Part-2.215 PN 2 PG 23 WC Crystallography SC Crystallography GA KX154 UT WOS:A1993KX15400005 ER PT J AU SMEDSKJAER, LC BANSIL, A AF SMEDSKJAER, LC BANSIL, A TI POSITRON-ANNIHILATION STUDIES OF THE ELECTRONIC-STRUCTURE AND FERMIOLOGY OF HIGH-T(C) SUPERCONDUCTORS SO ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES LA English DT Article; Proceedings Paper CT SAGAMORE-10 CONF ON CHARGE, SPIN AND MOMENTUM DENSITIES CY SEP 01-07, 1991 CL CONSTANCE, GERMANY SP INT UNION CRYSTALLOG, DEUT AKAD AUSTAUSCHDIENST, UNIV KONSTANZ, UNIV KONSTANZ, GESELL FREUNDE & FORDERER, TOWN KONSTANZ, BLUMENINSEL MAINAU, BASF, BODENSEEWERK PERKIN ELMER, BYK GULDEN LOMBERG CHEM FABRIK, CONVEX COMP DE POSITRON ANNIHILATION; ANGULAR CORRELATION OF ANNIHILATION RADIATION (ACAR); ELECTRON MOMENTUM DENSITY; HIGH-T(C) SUPERCONDUCTORS ID 2-DIMENSIONAL ANGULAR-CORRELATION; MOMENTUM DENSITY; HIGH-SENSITIVITY; SURFACE; YBA2CU3O7-X; BI2SR2CACU2O8+DELTA; SUPERSTRUCTURE; SPECTROSCOPY; RADIATION; ORIGIN AB We discuss the application of the positron annihilation angular correlation (ACAR) spectroscopy for investigating the electronic structure and Fermiology of high-T(c) superconductors, with focus on the YBa2Cu3O7 system where most of the experimental and theoretical work has to date been concentrated. Detailed comparisons between the measured 2D-ACAR positron spectra and the corresponding band theory predictions show a remarkable agreement (for the normal state), indicating that the electronic structure and Fermi surface of this material is described reasonably by the conventional picture. C1 NORTHEASTERN UNIV,DEPT PHYS,BOSTON,MA 02115. RP SMEDSKJAER, LC (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 64 TC 3 Z9 3 U1 0 U2 0 PU VERLAG Z NATURFORSCH PI TUBINGEN PA POSTFACH 2645, W-7400 TUBINGEN, GERMANY SN 0932-0784 J9 Z NATURFORSCH A JI Z. Naturfors. Sect. A-J. Phys. Sci. PD JAN-FEB PY 1993 VL 48 IS 1-2 BP 398 EP 405 PG 8 WC Chemistry, Physical; Physics, Multidisciplinary SC Chemistry; Physics GA KW966 UT WOS:A1993KW96600065 ER PT J AU BLASDELL, RC CEPERLEY, DM SIMMONS, RO AF BLASDELL, RC CEPERLEY, DM SIMMONS, RO TI NEUTRON AND PIMC DETERMINATION OF THE LONGITUDINAL MOMENTUM DISTRIBUTION OF HCP, BCC AND NORMAL LIQUID-HE-4 SO ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES LA English DT Article; Proceedings Paper CT SAGAMORE-10 CONF ON CHARGE, SPIN AND MOMENTUM DENSITIES CY SEP 01-07, 1991 CL CONSTANCE, GERMANY SP INT UNION CRYSTALLOG, DEUT AKAD AUSTAUSCHDIENST, UNIV KONSTANZ, UNIV KONSTANZ, GESELL FREUNDE & FORDERER, TOWN KONSTANZ, BLUMENINSEL MAINAU, BASF, BODENSEEWERK PERKIN ELMER, BYK GULDEN LOMBERG CHEM FABRIK, CONVEX COMP DE MOMENTUM DISTRIBUTION; NEUTRON; HELIUM ID SCATTERING AB Deep inelastic neutron scattering has been used to measure the neutron Compton profile (NCP) of a series of condensed He-4 samples at densities from 28.8 atoms/nm3 (essentially the minimum possible density in the solid phase) up to 39.8 atoms/nm3 using a chopper spectrometer at the Argonne National Laboratory Intense Pulsed Neutron Source. At the lowest density, the NCP was measured along an isochore through the hcp, bcc, and normal liquid phases. Average atomic kinetic energies are extracted from each of the data sets and are compared to both published and new path integral Monte-Carlo (PIMC) calculations as well as other theoretical predictions. In this preliminary analysis of the data, account is taken of the effects of instrumental resolution, multiple scattering, and final-state interactions. Both our measurements and the PIMC theory show that there are only small differences in the kinetic energy and longitudinal momentum distribution of isochoric helium samples, regardless of their phase or crystal structure. C1 UNIV ILLINOIS,DEPT PHYS,1110 W GREEN ST,URBANA,IL 61801. UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RI Ceperley, David/A-6858-2008 NR 12 TC 21 Z9 21 U1 1 U2 2 PU VERLAG Z NATURFORSCH PI TUBINGEN PA POSTFACH 2645, W-7400 TUBINGEN, GERMANY SN 0932-0784 J9 Z NATURFORSCH A JI Z. Naturfors. Sect. A-J. Phys. Sci. PD JAN-FEB PY 1993 VL 48 IS 1-2 BP 433 EP 437 PG 5 WC Chemistry, Physical; Physics, Multidisciplinary SC Chemistry; Physics GA KW966 UT WOS:A1993KW96600069 ER PT J AU WILLSAU, P HUBEL, H KORTEN, W AZAIEZ, F DELEPLANQUE, MA DIAMOND, RM MACCHIAVELLI, AO STEPHENS, FS KLUGE, H HANNACHI, F BACELAR, JC BECKER, JA BRINKMAN, MJ HENRY, EA KUHNERT, A WANG, TF DRAPER, JA RUBEL, E AF WILLSAU, P HUBEL, H KORTEN, W AZAIEZ, F DELEPLANQUE, MA DIAMOND, RM MACCHIAVELLI, AO STEPHENS, FS KLUGE, H HANNACHI, F BACELAR, JC BECKER, JA BRINKMAN, MJ HENRY, EA KUHNERT, A WANG, TF DRAPER, JA RUBEL, E TI TRANSITION QUADRUPOLE-MOMENTS OF SUPERDEFORMED STATES IN PB-194 SO ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI LA English DT Note ID BANDS AB Lifetimes of superdeformed states in 194Pb were measured by the Doppler-shift attenuation method. Quadrupole moments around 20 eb, that are constant over the observed frequency range, are derived. The results rule out large centrifugal stretching effects. C1 LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. HAHN MEITNER INST KERNFORSCH,W-1000 BERLIN,GERMANY. CTR SPECTROMETRIE NUCL & SPECTROMETRIE MASSE,F-91405 ORSAY,FRANCE. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV CALIF DAVIS,DAVIS,CA 95611. RP WILLSAU, P (reprint author), UNIV BONN,INST STRAHLEN & KERNPHYS,NUSSALLEE 14-16,W-5300 BONN,GERMANY. RI KORTEN, Wolfram/H-3043-2013 NR 11 TC 34 Z9 34 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0939-7922 J9 Z PHYS A-HADRON NUCL JI Z. Phys. A.-Hadrons Nuclei PD JAN PY 1993 VL 344 IS 3 BP 351 EP 352 PG 2 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA KH264 UT WOS:A1993KH26400017 ER PT J AU SANDLER, PH KINNEL, TS SMITH, WH BACHMANN, K BLAIR, R FOUDAS, C KING, B LEFMANN, WC LEUNG, WC MISHRA, SR QUINTAS, PZ RABINOWITZ, SA SCIULLI, F SELIGMAN, W SHAEVITZ, MH MERRITT, FS OREGLIA, MJ SCHELLMAN, H SCHUMM, B BERNSTEIN, RH BORCHERDING, F LAMM, MJ MARSH, W YOVANOVITCH, D BODEK, A BUDD, HS DEBARBARO, P SAKUMOTO, WK AF SANDLER, PH KINNEL, TS SMITH, WH BACHMANN, K BLAIR, R FOUDAS, C KING, B LEFMANN, WC LEUNG, WC MISHRA, SR QUINTAS, PZ RABINOWITZ, SA SCIULLI, F SELIGMAN, W SHAEVITZ, MH MERRITT, FS OREGLIA, MJ SCHELLMAN, H SCHUMM, B BERNSTEIN, RH BORCHERDING, F LAMM, MJ MARSH, W YOVANOVITCH, D BODEK, A BUDD, HS DEBARBARO, P SAKUMOTO, WK TI NEUTRINO PRODUCTION OF SAME-SIGN DIMUONS AT THE FERMILAB TEVATRON SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID CHARGED-CURRENT INTERACTIONS; FRAGMENTATION; TARGET; PROTON AB The rate of neutrino- and antineutrino-induced prompt same-sign dimuon production in steel was measured using a sample of 220 mu-mu- events and 25 mu+mu+ events with P(mu) > 9 GeV/c, produced in 1.5 million nu(mu) and 0.3 million mu(mu)BAR induced charged-current events with energies between 30 GeV and 600 GeV. The data were obtained with the Chicago-Columbia-Fermilab-Rochester (CCFR) neutrino detector in the Fermilab Tevatron Quadrupole Triplet Neutrino Beam during experiments E 744 and E 770. After background subtraction, the prompt rate of same-sign dimuon production is (0.53 +/- 0.24) x 10(-4) per nu(mu) charged-current event and (0.52 +/- 0.33) x 10(-4) per nu(mu)BAR charged-current event. The kinematic distributions of the same-sign dimuon events after background subtraction are consistent with those of the non-prompt background due to meson decays in the hadron shower of a charged-current event. Calculations of ccBAR gluon bremsstrahlung, based on improved measurements of the charm mass parameter and nucleon structure functions by the CCFR collaboration, yield a prompt rate of (0.09 +/- 0.39) x 10(-4) per nu(mu) charged-current event. In this case, ccBAR gluon bremsstrahlung is probably not an observable source of prompt same-sign dimuons. C1 COLUMBIA UNIV,DEPT PHYS,NEW YORK,NY 10027. UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV ROCHESTER,DEPT PHYS,ROCHESTER,NY 14627. RP SANDLER, PH (reprint author), UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706, USA. OI Bernstein, Robert/0000-0002-7610-950X NR 44 TC 14 Z9 14 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD JAN PY 1993 VL 57 IS 1 BP 1 EP 12 DI 10.1007/BF01555733 PG 12 WC Physics, Particles & Fields SC Physics GA KJ037 UT WOS:A1993KJ03700001 ER PT J AU ALBRECHT, R AWES, TC BAKTASH, C BECKMANN, P BERGER, F BLOOMER, MA BOCK, D BOCK, R CLAESSON, G CLEWING, G DRAGON, L EKLUND, A FERGUSON, R FRANZ, A GARPMAN, SIA GLASOW, R GUSTAFSSON, HA GUTBROD, HH HOLKER, G IDH, J JACOBS, P KAMPERT, KH KOLB, BW LOHNER, H LUND, I OBENSHAIN, FE OSKARSSON, A OTTERLUND, I PEITZMANN, T PLASIL, F POSKANZER, AM PURSCHKE, ML RITTER, HG ROTERS, B SAINI, S SANTO, R SCHMIDT, HR SORENSEN, SP STEINHAEUSER, P STEFFENS, K STENLUND, E STUKEN, D YOUNG, GR AF ALBRECHT, R AWES, TC BAKTASH, C BECKMANN, P BERGER, F BLOOMER, MA BOCK, D BOCK, R CLAESSON, G CLEWING, G DRAGON, L EKLUND, A FERGUSON, R FRANZ, A GARPMAN, SIA GLASOW, R GUSTAFSSON, HA GUTBROD, HH HOLKER, G IDH, J JACOBS, P KAMPERT, KH KOLB, BW LOHNER, H LUND, I OBENSHAIN, FE OSKARSSON, A OTTERLUND, I PEITZMANN, T PLASIL, F POSKANZER, AM PURSCHKE, ML RITTER, HG ROTERS, B SAINI, S SANTO, R SCHMIDT, HR SORENSEN, SP STEINHAEUSER, P STEFFENS, K STENLUND, E STUKEN, D YOUNG, GR TI PRODUCTION OF SLOW SINGLY CHARGED FRAGMENTS IN 200 GEV/C HADRON NUCLEUS INTERACTIONS SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID COLLISIONS; SPECTROMETER; PROTONS; NUMBER; WA80 AB Measurements of, slow, singly charged fragments in the target rapidity region have been performed for proton and pion induced reactions with various nuclei at 200 GeV/c. Multiplicity, angular and energy distributions are examined and used to study the effects of rescattering in the nuclear medium. Data are compared to a ''geometric cascade model' and to simulations with the VENUS 3.11 and the FRITIOF 1.7 Monte Carlo codes. C1 UNIV LUND, DEPT PHYS, DIV COSM & SUBATOM PHYS, S-22362 LUND, SWEDEN. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. UNIV GRONINGEN, KVI, 9747 AA GRONINGEN, NETHERLANDS. LAWRENCE BERKELEY LAB, DIV NUCL SCI, BERKELEY, CA 94720 USA. UNIV MUNSTER, INST KERNPHYS, W-4400 MUNSTER, GERMANY. UNIV TENNESSEE, KNOXVILLE, TN 37996 USA. RP ALBRECHT, R (reprint author), GESELLSCH SCHWERIONENFORSCH, PLANCKSTR 1, POSTFACH 110541, W-6100 DARMSTADT, GERMANY. RI Peitzmann, Thomas/K-2206-2012; Lohner, Herbert/B-2397-2014; OI Peitzmann, Thomas/0000-0002-7116-899X; Lohner, Herbert/0000-0002-7441-739X; Kampert, Karl-Heinz/0000-0002-2805-0195 NR 23 TC 8 Z9 8 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD JAN PY 1993 VL 57 IS 1 BP 37 EP 42 DI 10.1007/BF01555736 PG 6 WC Physics, Particles & Fields SC Physics GA KJ037 UT WOS:A1993KJ03700004 ER PT J AU SWITENDICK, AC AF SWITENDICK, AC TI THE ELECTRONIC-STRUCTURE OF ALKALI METAL-NICKEL GROUP-HYDROGEN COMPOUNDS .1. LI2PDH2 AND K2PDH4 SO ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS LA English DT Article; Proceedings Paper CT 3rd International Symposium on Metal-Hydrogen Systems: Fundamentals and Applications CY JUN 08-12, 1992 CL UPPSALA, SWEDEN DE LI2PDH2; K2PDH2; ELECTRONIC STRUCTURE; LAPW METHOD ID HYDRIDE; COMPLEX; ANIONS AB The electronic structure of Li2PdH2 and K2PdH4 was calculated. The former is metallic, while the latter is insulating. The origin of the bands, nature of the bonding and valence charge densities are discussed. RP SWITENDICK, AC (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 8 TC 7 Z9 7 U1 0 U2 0 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0942-9352 J9 Z PHYS CHEM JI Z. Phys. Chemie-Int. J. Res. Phys. Chem. Chem. Phys. PY 1993 VL 181 BP 19 EP 25 PN 1-2 PG 7 WC Chemistry, Physical SC Chemistry GA NB576 UT WOS:A1993NB57600003 ER PT J AU BOWMAN, RC TORGESON, DR MAELAND, AJ AF BOWMAN, RC TORGESON, DR MAELAND, AJ TI PROTON NMR-STUDIES OF HYDROGEN DIFFUSION BEHAVIOR FOR ZRBE2H1.4 SO ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS LA English DT Article; Proceedings Paper CT 3rd International Symposium on Metal-Hydrogen Systems: Fundamentals and Applications CY JUN 08-12, 1992 CL UPPSALA, SWEDEN DE 1H NMR; 1H RELAXATION TIMES; H DIFFUSION; ZR-BE HYDRIDE ID CROSS-RELAXATION; HYDRIDES; SYSTEMS; ZR2NI AB To determine hydrogen diffusion behavior in ZrBe2Hx, where hydrogen atoms occupy hexahedral Zr3Be2 Sites, proton relaxation times have been measured between 100 K and 400 K. These relaxation times yield an activation energy of 0.18 +/- 0.02 eV for the proton motion, which is much smaller than activation energies for proton diffusion in ZrH(x) or Zr2PdH(x) where tetrahedral Zr4 sites are occupied by the hydrogen atoms. Furthermore, the proton hopping rates in ZrBe2H(x) are among the fastest observed for any crystalline or amorphous ternary hydride containing Zr. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. CONCRETE SOLUT INC,MERIDEN,CT 06450. RP BOWMAN, RC (reprint author), AEROJET ELECTR SYST DIV,POB 296,AZUSA,CA 91702, USA. NR 16 TC 4 Z9 4 U1 0 U2 0 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0942-9352 J9 Z PHYS CHEM JI Z. Phys. Chemie-Int. J. Res. Phys. Chem. Chem. Phys. PY 1993 VL 181 BP 181 EP 186 PN 1-2 PG 6 WC Chemistry, Physical SC Chemistry GA NB576 UT WOS:A1993NB57600024 ER PT J AU MAJER, G RENZ, W SEEGER, A BARNES, RG AF MAJER, G RENZ, W SEEGER, A BARNES, RG TI PULSED-FIELD-GRADIENT NMR INVESTIGATIONS OF HYDROGEN DIFFUSION IN ZRHX SO ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS LA English DT Article; Proceedings Paper CT 3rd International Symposium on Metal-Hydrogen Systems: Fundamentals and Applications CY JUN 08-12, 1992 CL UPPSALA, SWEDEN DE HYDROGEN DIFFUSION; NMR SPECTROSCOPY; ZIRCONIUM DIHYDRIDE ID NUCLEAR-MAGNETIC-RESONANCE; SPIN-LATTICE-RELAXATION; ZIRCONIUM HYDRIDE; HIGH-TEMPERATURES; TANTALUM; METALS; ECHO AB The macroscopic diffusivities D of protons in zirconium dihydrides, ZrH(x) (1.58 less-than-or-equal-to x less-than-or-equal-to 1.93), have been investigated by means of pulsed-field-gradient nuclear magnetic resonance at temperatures up to 900 K. The diffusivities D follow normal Arrhenius behaviour, D = D0exp(-H(a)/k(B)T), with activation enthalpies between H(a) = 614 meV (x = 1.58) and H(a) = 760 meV (x = 1.93). The H(a) values, which increase sharply as x approaches the limiting value 2, agree satisfactorily with data derived from the spin-lattice relaxation rate, GAMMA1, measured on the same samples. A combined analysis of both GAMMA1 and D measurements provides useful information on the underlying diffusion mechanism and shows that the diffusing H atoms jump between nearest-neighbour tetrahedral sites. The attempt frequency nu(a) almost-equal-to 10(13) S-1 is in accordance with neutron scattering data. A definitive decision between classical (over-barrier) diffusion jumps and the so-called adiabatic mechanism of quantum diffusion is not yet possible although the experimental data are slightly in favour of the classical mechanism. C1 US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP MAJER, G (reprint author), MAX PLANCK INST MET RES,INST PHYS,HEISENBERGSTR 1,D-70506 STUTTGART,GERMANY. NR 22 TC 15 Z9 15 U1 1 U2 2 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0942-9352 J9 Z PHYS CHEM JI Z. Phys. Chemie-Int. J. Res. Phys. Chem. Chem. Phys. PY 1993 VL 181 BP 187 EP 194 PN 1-2 PG 8 WC Chemistry, Physical SC Chemistry GA NB576 UT WOS:A1993NB57600025 ER PT J AU POWELL, GL CEO, RN HARPER, WL KIRKPATRICK, JR AF POWELL, GL CEO, RN HARPER, WL KIRKPATRICK, JR TI THE KINETICS OF THE HYDRIDING OF URANIUM METAL II SO ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS LA English DT Article; Proceedings Paper CT 3rd International Symposium on Metal-Hydrogen Systems: Fundamentals and Applications CY JUN 08-12, 1992 CL UPPSALA, SWEDEN DE HYDRIDING KINETICS; URANIUM; HIGH PRESSURE; IR SPECTROSCOPY; MODELS AB The corrosion reaction of H-2 with massive uranium metal to form UH3 is described in terms of the initiation, pitting of the uranium surface at a linear rate, a transition to a higher linear rate, and finally a higher rate associated with the disintegration of the specimen. Infrared spectroscopic experiments monitor the chemistry of the uranium oxide film during heating to activate the uranium for hydriding. Low-magnification optical microscopy monitored the areal coverage of the uranium surface by UH3 during the pitting stage. High pressure measurements of the main linear rate process are reported and these results, pooled with earlier data, are described by a model that calculates valid rates over the range of 10 mPa to 1 MPa in H-2 pressure over a -20-degrees-C to 400-degrees-C temperature range. RP POWELL, GL (reprint author), MARTIN MARIETTA ENERGY SYST INC,OAK RIDGE Y-12 PLANT,OAK RIDGE,TN 37831, USA. NR 10 TC 15 Z9 15 U1 0 U2 0 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0942-9352 J9 Z PHYS CHEM JI Z. Phys. Chemie-Int. J. Res. Phys. Chem. Chem. Phys. PY 1993 VL 181 BP 275 EP 282 PN 1-2 PG 8 WC Chemistry, Physical SC Chemistry GA NB576 UT WOS:A1993NB57600036 ER PT J AU KAPPESSER, B SCHMIDT, R WIPF, H BARNES, RG BEAUDRY, BJ AF KAPPESSER, B SCHMIDT, R WIPF, H BARNES, RG BEAUDRY, BJ TI INTERNAL-FRICTION STUDY OF HYDROGEN AND DEUTERIUM RELAXATION IN YTTRIUM SO ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS LA English DT Article; Proceedings Paper CT International Symposium on Metal-Hydrogen Systems, Fundamentals and Applications CY JUN 08-12, 1992 CL UPPSALA, SWEDEN DE INTERNAL FRICTION; H(D) IN YTTRIUM ID LOCATION AB The anelastic relaxation caused by H and D in polycrystalline hexagonal (alpha-phase) YH(x) and Y D(x) was studied with the help of the vibrating reed technique (x less-than-or-equal-to 0.17, 5 K less-than-or-equal-to T less-than-or-equal-to 330 K, frequencies f between 100 and 1100 Hz). The measurements yielded a single relaxation peak located, e.g. for f = 500 Hz, at 272 and 279 K in the case of H and D, respectively. The peak position is independent of x, and the relaxation strength rises roughly linearly with x. The widths of the relaxation peaks exceed those expected for an ideal Debye relaxation by about 40%. The relaxation rates tau-1 can be described by an Arrhenius relation tau0(-1) exp(E/k(B)T) with an identical activation energy E = (0.60 +/- 0.05) eV for both H and D. The microscopic H or D jump processes, which may lead to the relaxation, are discussed. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP KAPPESSER, B (reprint author), TECH HSCH DARMSTADT,INST FESTKORPERPHYS,HSCH STR 6,D-64289 DARMSTADT,GERMANY. NR 12 TC 5 Z9 5 U1 0 U2 0 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0942-9352 J9 Z PHYS CHEM JI Z. Phys. Chemie-Int. J. Res. Phys. Chem. Chem. Phys. PY 1993 VL 179 BP 343 EP 347 PN 1-2 PG 5 WC Chemistry, Physical SC Chemistry GA MN765 UT WOS:A1993MN76500043 ER PT J AU LEISURE, RG SCHWARZ, RB MIGLIORI, A TORGESON, DR SVARE, I ANDERSON, IS AF LEISURE, RG SCHWARZ, RB MIGLIORI, A TORGESON, DR SVARE, I ANDERSON, IS TI RESONANT ULTRASOUND INVESTIGATION OF RARE-EARTH METAL-HYDROGEN MATERIALS SO ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS LA English DT Article; Proceedings Paper CT International Symposium on Metal-Hydrogen Systems, Fundamentals and Applications CY JUN 08-12, 1992 CL UPPSALA, SWEDEN DE RARE-EARTH METAL HYDRIDES; RESONANT ULTRASOUND SPECTROSCOPY; ELASTIC CONSTANTS; ISOTOPE EFFECT ID ANELASTIC RELAXATION MEASUREMENTS; NIOBIUM AB Resonant ultrasound spectroscopy has been used to study the ultrasonic attenuation and elastic constants of ScH(x), ScD(x), and YD(x) over the temperature range of 10 - 300 K. All three materials show an attenuation peak below 100 K for measuring frequencies in the range of 1 MHz. In the case of Sc a large isotope effect is observed. C1 IOWA STATE UNIV SCI & TECHNOL,AMES,IA 50011. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV TRONDHEIM,NTH,N-7034 TRONDHEIM,NORWAY. INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE. RP LEISURE, RG (reprint author), COLORADO STATE UNIV,FT COLLINS,CO 80523, USA. NR 17 TC 5 Z9 5 U1 0 U2 3 PU R OLDENBOURG VERLAG PI MUNICH 80 PA ROSENHEIMER STR 145 POSTFACH 801360, W-8000 MUNICH 80, GERMANY SN 0942-9352 J9 Z PHYS CHEM JI Z. Phys. Chemie-Int. J. Res. Phys. Chem. Chem. Phys. PY 1993 VL 179 BP 359 EP 363 PN 1-2 PG 5 WC Chemistry, Physical SC Chemistry GA MN765 UT WOS:A1993MN76500045 ER PT J AU VONBRENTANO, P ZAMFIR, NV AF VONBRENTANO, P ZAMFIR, NV TI ON A MEASURE OF THE COMPLEXITY OF NUCLEAR-STATES AND THE ONSET OF CHAOS SO PHYSICS LETTERS B LA English DT Article ID INTERACTING-BOSON MODEL; LYING COLLECTIVE STATES; EVEN-EVEN NUCLEI; ROTATING NUCLEI; SPECTRUM; EIGENFUNCTIONS; RESONANCES; DYNAMICS; REGION AB Through the S-matrix of the nuclear system, an effective nonhermitean hamiltonian is introduced. A matrix which measures the complexity of nuclear states from an E2 sum rule is introduced. Numerical calculations for the SU(3)-U(5) transition of the interacting boson model are performed. The transition from order to chaos in nuclear spectra is discussed in terms of a participation index. A transition from order to chaos is obtained when the SU(3) symmetry is broken, in agreement with the nearest neighbour distributions, but fails to reflect the order corresponding to the U(5) symmetry. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. RP VONBRENTANO, P (reprint author), UNIV COLOGNE,INST KERNPHYS,W-5000 COLOGNE 41,GERMANY. RI Zamfir, Nicolae Victor/F-2544-2011 NR 31 TC 4 Z9 4 U1 0 U2 1 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 DEC 31 PY 1992 VL 297 IS 3-4 BP 219 EP 222 DI 10.1016/0370-2693(92)91251-4 PG 4 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KF698 UT WOS:A1992KF69800001 ER PT J AU HUANG, HZ BEEDOE, S BOUGTEB, M CAILIU, J CARROLL, J HALLMAN, T HEILBRONN, L IGO, G KIRK, P KREBS, G LETESSIERSELVON, A LUTTRELL, B MANSO, F MADANSKY, L MATIS, HS MILLER, D MILLER, J NAUDET, C PORTER, RJ ROCHE, G SCHROEDER, LS SEIDL, PA WANG, ZF WELSH, R WILSON, WK YEGNESWARAN, A AF HUANG, HZ BEEDOE, S BOUGTEB, M CAILIU, J CARROLL, J HALLMAN, T HEILBRONN, L IGO, G KIRK, P KREBS, G LETESSIERSELVON, A LUTTRELL, B MANSO, F MADANSKY, L MATIS, HS MILLER, D MILLER, J NAUDET, C PORTER, RJ ROCHE, G SCHROEDER, LS SEIDL, PA WANG, ZF WELSH, R WILSON, WK YEGNESWARAN, A TI DIELECTRON YIELDS IN P+D AND P+P COLLISIONS AT 4.9 GEV SO PHYSICS LETTERS B LA English DT Article ID HEAVY-ION COLLISIONS; NUCLEON-NUCLEON COLLISIONS; P-BE COLLISIONS; DILEPTON PRODUCTION; RADIATION AB The dielectron yield in p+d and p+p collisions at a beam kinetic energy of 4.9 GeV has been measured using the Dilepton Spectrometer (DLS) at the Bevalac. The measured ratio of the yield in p+d to that in p+p collisions, 1.92 +/- 0.06, is in disagreement with the assumptions of model calculations applied to our earlier p+Be data, where it was found that p+n bremsstrahlung dominated other sources. While the measured ratio is consistent with a hadron-like origin of the dielectrons, the contributions of known hadronic decays are smaller than the measured yield from p+p collisions. C1 UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV CLERMONT FERRAND,IN2P3,F-63177 CLERMONT FERRAND,FRANCE. CEBAF,NEWPORT NEWS,VA 23606. LOUISIANA STATE UNIV,BATON ROUGE,LA 70803. NORTHWESTERN UNIV,EVANSTON,IL 60201. RP HUANG, HZ (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Heilbronn, Lawrence/J-6998-2013 OI Heilbronn, Lawrence/0000-0002-8226-1057 NR 25 TC 15 Z9 15 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 DEC 31 PY 1992 VL 297 IS 3-4 BP 233 EP 237 DI 10.1016/0370-2693(92)91254-7 PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KF698 UT WOS:A1992KF69800004 ER PT J AU LAHIRI, A AF LAHIRI, A TI AN ALTERNATIVE SCENARIO FOR NON-ABELIAN QUANTUM HAIR SO PHYSICS LETTERS B LA English DT Article ID BLACK-HOLES AB Topologically charged black holes in a theory with a 2-form coupled to a non-abelian gauge field are investigated. It is found that the ground states of black holes are classified by a coset space O(N2-1)/SU(N) when the gauge group is SU(N). RP LAHIRI, A (reprint author), LOS ALAMOS NATL LAB,DIV THEORET T8,LOS ALAMOS,NM 87545, USA. RI Lahiri, Amitabha/C-8114-2011 OI Lahiri, Amitabha/0000-0001-8113-6345 NR 11 TC 8 Z9 8 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 DEC 31 PY 1992 VL 297 IS 3-4 BP 248 EP 252 DI 10.1016/0370-2693(92)91257-A PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KF698 UT WOS:A1992KF69800007 ER PT J AU DERRICK, M KRAKAUER, D MAGILL, S MUSGRAVE, B REPOND, J SUGANO, K STANEK, R TALAGA, RL THRON, J ARZARELLO, F AYED, R BARBAGLI, G BARI, G BASILE, M BELLAGAMBA, L BOSCHERINI, D BRUNI, G BRUNI, P ROMEO, GC CASTELLINI, G CHIARINI, M CIFARELLI, L CINDOLO, F CIRALLI, F CONTIN, A DAURIA, S DELPAPA, C FRASCONI, F GIUSTI, P IACOBUCCI, G LAURENTI, G LEVI, G LIN, Q LISOWSKI, B MACCARRONE, G MARGOTTI, A MASSAM, T NANIA, R NEMOZ, C PALMONARI, F SARTORELLI, G TIMELLINI, R GARCIA, YZ ZICHICHI, A BARGENDE, A BARREIRO, F CRITTENDEN, J DABBOUS, H DESCH, K DIEKMANN, B GEERTS, M GEITZ, G GUTJAHR, B HARTMANN, H HARTMANN, J HAUN, D HEINLOTH, K HILGER, E JAKOB, HP KRAMARCZYK, S KUCKES, M MASS, A MENGEL, S MOLLEN, J MUSCH, H PAUL, E SCHATTEVOY, R SCHNEIDER, B SCHNEIDER, JL WEDEMEYER, R CASSIDY, A CUSSANS, DG DYCE, N FAWCETT, HF FOSTER, B GILMORE, R HEATH, GP LANCASTER, M LLEWELLYN, TJ MALOS, J MORGADO, CJS TAPPER, RJ WILSON, SS RAU, RR BERNSTEIN, A CALDWELL, A GIALAS, I PARSONS, JA RITZ, S SCIULLI, F STRAUB, PB WAI, L YANG, S BARILLARI, T SCHIOPPA, M SUSINNO, G BURKOT, W CHWASTOWSKI, J DWURAZNY, A ESKREYS, A NIZIOL, B JAKUBOWSKI, Z PIOTRZKOWSKI, K ZACHARA, M ZAWIEJSKI, L BORZEMSKI, P ESKREYS, K JELEN, K KISIELEWSKA, D KOWALSKI, T KULKA, J RULIKOWSKAZAREBSKA, E SUSZYCKI, L ZAJAC, J KEDZIERSKI, T KOTANSKI, A PRZYBYCIEN, M BAUERDICK, LAT BEHRENS, U BIENLEIN, JK COLDEWEY, C DANNEMANN, A DIERKS, K DORTH, W DREWS, G ERHARD, P FLASINSKI, M FLECK, I FURTJES, A GLASER, R GOTTLICHER, P HAAS, T HAGGE, L HAIN, W HASELL, D HULTSCHIG, H JAHNEN, G JOOS, P KASEMANN, M KLANNER, R KOCH, W KOTZ, U KOWALSKI, H LABS, J LADAGE, A LOHR, B LOWE, M LUKE, D MAINUSCH, J MANCZAK, O MOMAYEZI, M NICKEL, S NOTZ, D PARK, I POSNECKER, KU ROHDE, M ROS, E SCHNEEKLOTH, U SCHROEDER, J SCHULZ, W SELONKE, F TSCHESLOG, E TSURUGAI, T TURKOT, F VOGEL, W WOENIGER, T WOLF, G YOUNGMAN, C GRABOSCH, HJ LEICH, A MEYER, A RETHFELDT, C SCHLENSTEDT, S CASALBUONI, R DECURTIS, S DOMINICI, D FRANCESCATO, A NUTI, M PELFER, P ANZIVINO, G CASACCIA, R LAAKSO, I DEPASQUALE, S QIAN, S VOTANO, L BAMBERGER, A FREIDHOF, A POSER, T SOLDNERREMBOLD, S THEISEN, G TREFZGER, T BROOK, NH BUSSEY, PJ DOYLE, AT FORBES, JR JAMIESON, VA RAINE, C SAXON, DH GLOTH, G HOLM, U KAMMERLOCHER, H KREBS, B NEUMANN, T WICK, K HOFMANN, A KROGER, W KRUGER, J LOHRMANN, E MILEWSKI, J NAKAHATA, M PAVEL, N POELZ, G SALOMON, R SEIDMAN, A SCHOTT, W WIIK, BH ZETSCHE, F BACON, TC BUTTERWORTH, I MARKOU, C MCQUILLAN, D MILLER, DB MOBAYYEN, MM PRINIAS, A VORVOLAKOS, A BIENZ, T KREUTZMANN, H MALLIK, U MCCLIMENT, E ROCO, M WANG, MZ CLOTH, P FILGES, D CHEN, L IMLAY, R KARTIK, S KIM, HJ MCNEIL, RR METCALF, W CASES, G HERVAS, L LABARGA, L DELPESO, J ROLDAN, J TERRON, J DETROCONIZ, JF IKRAIAM, F MAYER, JK SMITH, GR CORRIVEAU, F GILKINSON, DJ HANNA, DS HUNG, LW MITCHELL, JW PATEL, PM SINCLAIR, LE STAIRS, DG ULLMANN, R BASHINDZHAGYAN, GL ERMOLOV, PF GOLUBKOV, YA KUZMIN, VA KUZNETSOV, EN SAVIN, AA VORONIN, AG ZOTOV, NP BENTVELSEN, S DAKE, A ENGELEN, J DEJONG, P DEJONG, S DEKAMPS, M KOOIJMAN, P KRUSE, A VANDERLUGT, H ODELL, V STRAVER, J TENNER, A TIECKE, H UIJTERWAAL, H VERMEULEN, J WIGGERS, L DEWOLF, E VANWOUDENBERG, R YOSHIDA, R BYLSMA, B DURKIN, LS LI, C LING, TY MCLEAN, KW MURRAY, WN PARK, SK ROMANOWSKI, TA SEIDLEIN, R BLAIR, GA BUTTERWORTH, JM BYRNE, A CASHMORE, RJ COOPERSARKAR, AM DEVENISH, RCE GINGRICH, DM HALLAMBAKER, PM HARNEW, N KHATRI, T LONG, KR LUFFMAN, P MCARTHUR, I MORAWITZ, P NASH, J SMITH, SJP ROOCROFT, NC WILSON, FF ABBIENDI, G BRUGNERA, R CARLIN, R DALCORSO, F DEGIORGI, M DOSSELLI, U FANIN, C GASPARINI, F LIMENTANI, S MORANDIN, M POSOCCO, M STANCO, L STROILI, R VOCI, C LIM, JN OH, BY WHITMORE, J BONORI, M CONTINO, U DAGOSTINI, G GUIDA, M IORI, M MARI, S MARINI, G MATTIOLI, M MONALDI, D NIGRO, A HART, JC MCCUBBIN, NA SHAH, TP SHORT, TL BARBERIS, E CARTIGLIA, N HEUSCH, C HUBBARD, B LESLIE, J NG, JST OSHAUGHNESSY, K SADROZINSKI, HF SEIDEN, A BADURA, E BILTZINGER, J CHAVES, H ROST, M SEIFERT, RJ WALENTA, AH WEIHS, W ZECH, G DAGAN, S HEIFETZ, R LEVY, A ZERZION, D HASEGAWA, T HAZUMI, M ISHII, T KASAI, S KUZE, M NAGASAWA, Y NAKAO, M OKUNO, H TOKUSHUKU, K WATANABE, T YAMADA, S CHIBA, M HAMATSU, R HIROSE, T KITAMURA, S NAGAYAMA, S NAKAMITSU, Y ARNEODO, M COSTA, M FERRERO, MI LAMBERTI, L MASELLI, S PERONI, C SOLANO, A STAIANO, A DARDO, M BAILEY, DC BANDYOPADHYAY, D BENARD, F BHADRA, S BRKIC, M BUROW, BD CHLEBANA, FS CROMBIE, MB HARTNER, GF LEVMAN, GM MARTIN, JF ORR, RS PRENTICE, JD SAMPSON, CR STAIRS, GG TEUSCHER, RJ YOON, TS BULLOCK, FW CATTERALL, CD GIDDINGS, JC JONES, TW KHAN, AM LANE, JB MAKKAR, PL SHAW, D SHULMAN, J BLANKENSHIP, K KOCHOCKI, J LU, B MO, LW CHARCHULA, K CIBOROWSKI, J GAJEWSKI, J GRZELAK, G KASPRZAK, M KRZYZANOWSKI, M MUCHOROWSKI, K NOWAK, RJ PAWLAK, JM STOJDA, K STOPCZYNSKI, A SZWED, R TYMIENIECKA, T WALCZAK, R WROBLEWSKI, AK ZAKRZEWSKI, JA ZARNECKI, AF ADAMUS, M ABRAMOWICZ, H EISENBERG, Y GLASMAN, C KARSHON, U MONTAG, A REVEL, D SHAPIRA, A ALI, I BEHRENS, B CAMERINI, U DASU, S FORDHAM, C FOUDAS, C GOUSSIOU, A LOMPERSKI, M LOVELESS, RJ NYLANDER, P PTACEK, M REEDER, DD SMITH, WH SILVERSTEIN, S FRISKEN, WR FURUTANI, KM IGA, Y AF DERRICK, M KRAKAUER, D MAGILL, S MUSGRAVE, B REPOND, J SUGANO, K STANEK, R TALAGA, RL THRON, J ARZARELLO, F AYED, R BARBAGLI, G BARI, G BASILE, M BELLAGAMBA, L BOSCHERINI, D BRUNI, G BRUNI, P ROMEO, GC CASTELLINI, G CHIARINI, M CIFARELLI, L CINDOLO, F CIRALLI, F CONTIN, A DAURIA, S DELPAPA, C FRASCONI, F GIUSTI, P IACOBUCCI, G LAURENTI, G LEVI, G LIN, Q LISOWSKI, B MACCARRONE, G MARGOTTI, A MASSAM, T NANIA, R NEMOZ, C PALMONARI, F SARTORELLI, G TIMELLINI, R GARCIA, YZ ZICHICHI, A BARGENDE, A BARREIRO, F CRITTENDEN, J DABBOUS, H DESCH, K DIEKMANN, B GEERTS, M GEITZ, G GUTJAHR, B HARTMANN, H HARTMANN, J HAUN, D HEINLOTH, K HILGER, E JAKOB, HP KRAMARCZYK, S KUCKES, M MASS, A MENGEL, S MOLLEN, J MUSCH, H PAUL, E SCHATTEVOY, R SCHNEIDER, B SCHNEIDER, JL WEDEMEYER, R CASSIDY, A CUSSANS, DG DYCE, N FAWCETT, HF FOSTER, B GILMORE, R HEATH, GP LANCASTER, M LLEWELLYN, TJ MALOS, J MORGADO, CJS TAPPER, RJ WILSON, SS RAU, RR BERNSTEIN, A CALDWELL, A GIALAS, I PARSONS, JA RITZ, S SCIULLI, F STRAUB, PB WAI, L YANG, S BARILLARI, T SCHIOPPA, M SUSINNO, G BURKOT, W CHWASTOWSKI, J DWURAZNY, A ESKREYS, A NIZIOL, B JAKUBOWSKI, Z PIOTRZKOWSKI, K ZACHARA, M ZAWIEJSKI, L BORZEMSKI, P ESKREYS, K JELEN, K KISIELEWSKA, D KOWALSKI, T KULKA, J RULIKOWSKAZAREBSKA, E SUSZYCKI, L ZAJAC, J KEDZIERSKI, T KOTANSKI, A PRZYBYCIEN, M BAUERDICK, LAT BEHRENS, U BIENLEIN, JK COLDEWEY, C DANNEMANN, A DIERKS, K DORTH, W DREWS, G ERHARD, P FLASINSKI, M FLECK, I FURTJES, A GLASER, R GOTTLICHER, P HAAS, T HAGGE, L HAIN, W HASELL, D HULTSCHIG, H JAHNEN, G JOOS, P KASEMANN, M KLANNER, R KOCH, W KOTZ, U KOWALSKI, H LABS, J LADAGE, A LOHR, B LOWE, M LUKE, D MAINUSCH, J MANCZAK, O MOMAYEZI, M NICKEL, S NOTZ, D PARK, I POSNECKER, KU ROHDE, M ROS, E SCHNEEKLOTH, U SCHROEDER, J SCHULZ, W SELONKE, F TSCHESLOG, E TSURUGAI, T TURKOT, F VOGEL, W WOENIGER, T WOLF, G YOUNGMAN, C GRABOSCH, HJ LEICH, A MEYER, A RETHFELDT, C SCHLENSTEDT, S CASALBUONI, R DECURTIS, S DOMINICI, D FRANCESCATO, A NUTI, M PELFER, P ANZIVINO, G CASACCIA, R LAAKSO, I DEPASQUALE, S QIAN, S VOTANO, L BAMBERGER, A FREIDHOF, A POSER, T SOLDNERREMBOLD, S THEISEN, G TREFZGER, T BROOK, NH BUSSEY, PJ DOYLE, AT FORBES, JR JAMIESON, VA RAINE, C SAXON, DH GLOTH, G HOLM, U KAMMERLOCHER, H KREBS, B NEUMANN, T WICK, K HOFMANN, A KROGER, W KRUGER, J LOHRMANN, E MILEWSKI, J NAKAHATA, M PAVEL, N POELZ, G SALOMON, R SEIDMAN, A SCHOTT, W WIIK, BH ZETSCHE, F BACON, TC BUTTERWORTH, I MARKOU, C MCQUILLAN, D MILLER, DB MOBAYYEN, MM PRINIAS, A VORVOLAKOS, A BIENZ, T KREUTZMANN, H MALLIK, U MCCLIMENT, E ROCO, M WANG, MZ CLOTH, P FILGES, D CHEN, L IMLAY, R KARTIK, S KIM, HJ MCNEIL, RR METCALF, W CASES, G HERVAS, L LABARGA, L DELPESO, J ROLDAN, J TERRON, J DETROCONIZ, JF IKRAIAM, F MAYER, JK SMITH, GR CORRIVEAU, F GILKINSON, DJ HANNA, DS HUNG, LW MITCHELL, JW PATEL, PM SINCLAIR, LE STAIRS, DG ULLMANN, R BASHINDZHAGYAN, GL ERMOLOV, PF GOLUBKOV, YA KUZMIN, VA KUZNETSOV, EN SAVIN, AA VORONIN, AG ZOTOV, NP BENTVELSEN, S DAKE, A ENGELEN, J DEJONG, P DEJONG, S DEKAMPS, M KOOIJMAN, P KRUSE, A VANDERLUGT, H ODELL, V STRAVER, J TENNER, A TIECKE, H UIJTERWAAL, H VERMEULEN, J WIGGERS, L DEWOLF, E VANWOUDENBERG, R YOSHIDA, R BYLSMA, B DURKIN, LS LI, C LING, TY MCLEAN, KW MURRAY, WN PARK, SK ROMANOWSKI, TA SEIDLEIN, R BLAIR, GA BUTTERWORTH, JM BYRNE, A CASHMORE, RJ COOPERSARKAR, AM DEVENISH, RCE GINGRICH, DM HALLAMBAKER, PM HARNEW, N KHATRI, T LONG, KR LUFFMAN, P MCARTHUR, I MORAWITZ, P NASH, J SMITH, SJP ROOCROFT, NC WILSON, FF ABBIENDI, G BRUGNERA, R CARLIN, R DALCORSO, F DEGIORGI, M DOSSELLI, U FANIN, C GASPARINI, F LIMENTANI, S MORANDIN, M POSOCCO, M STANCO, L STROILI, R VOCI, C LIM, JN OH, BY WHITMORE, J BONORI, M CONTINO, U DAGOSTINI, G GUIDA, M IORI, M MARI, S MARINI, G MATTIOLI, M MONALDI, D NIGRO, A HART, JC MCCUBBIN, NA SHAH, TP SHORT, TL BARBERIS, E CARTIGLIA, N HEUSCH, C HUBBARD, B LESLIE, J NG, JST OSHAUGHNESSY, K SADROZINSKI, HF SEIDEN, A BADURA, E BILTZINGER, J CHAVES, H ROST, M SEIFERT, RJ WALENTA, AH WEIHS, W ZECH, G DAGAN, S HEIFETZ, R LEVY, A ZERZION, D HASEGAWA, T HAZUMI, M ISHII, T KASAI, S KUZE, M NAGASAWA, Y NAKAO, M OKUNO, H TOKUSHUKU, K WATANABE, T YAMADA, S CHIBA, M HAMATSU, R HIROSE, T KITAMURA, S NAGAYAMA, S NAKAMITSU, Y ARNEODO, M COSTA, M FERRERO, MI LAMBERTI, L MASELLI, S PERONI, C SOLANO, A STAIANO, A DARDO, M BAILEY, DC BANDYOPADHYAY, D BENARD, F BHADRA, S BRKIC, M BUROW, BD CHLEBANA, FS CROMBIE, MB HARTNER, GF LEVMAN, GM MARTIN, JF ORR, RS PRENTICE, JD SAMPSON, CR STAIRS, GG TEUSCHER, RJ YOON, TS BULLOCK, FW CATTERALL, CD GIDDINGS, JC JONES, TW KHAN, AM LANE, JB MAKKAR, PL SHAW, D SHULMAN, J BLANKENSHIP, K KOCHOCKI, J LU, B MO, LW CHARCHULA, K CIBOROWSKI, J GAJEWSKI, J GRZELAK, G KASPRZAK, M KRZYZANOWSKI, M MUCHOROWSKI, K NOWAK, RJ PAWLAK, JM STOJDA, K STOPCZYNSKI, A SZWED, R TYMIENIECKA, T WALCZAK, R WROBLEWSKI, AK ZAKRZEWSKI, JA ZARNECKI, AF ADAMUS, M ABRAMOWICZ, H EISENBERG, Y GLASMAN, C KARSHON, U MONTAG, A REVEL, D SHAPIRA, A ALI, I BEHRENS, B CAMERINI, U DASU, S FORDHAM, C FOUDAS, C GOUSSIOU, A LOMPERSKI, M LOVELESS, RJ NYLANDER, P PTACEK, M REEDER, DD SMITH, WH SILVERSTEIN, S FRISKEN, WR FURUTANI, KM IGA, Y TI OBSERVATION OF HARD SCATTERING IN PHOTOPRODUCTION AT HERA SO PHYSICS LETTERS B LA English DT Article ID INELASTIC MUON SCATTERING; CERN PBARP COLLIDER; JET PRODUCTION; CROSS-SECTION; PHOTON; ZEUS; QCD AB We report a study of electron proton collisions at very low Q2, corresponding to virtual photoproduction at centre of mass energies in the range 100-295 GeV. The distribution in transverse energy of the observed hadrons is much harder than can be explained by soft processes. Some of the events show back-to-back two-jet production at the rate and with the characteristics expected from hard two-body scattering. A subset of the two-jet events have energy in the electron direction consistent with that expected from the photon remnant in resolved photon processes. C1 UNIV BOLOGNA,I-40126 BOLOGNA,ITALY. INFN,I-40126 BOLOGNA,ITALY. UNIV BONN,INST PHYS,W-5300 BONN 1,GERMANY. UNIV BRISTOL,BRISTOL BS8 1TL,AVON,ENGLAND. BROOKHAVEN NATL LAB,UPTON,NY 11973. COLUMBIA UNIV,NEVIS LABS,IRVINGTON,NY 10533. UNIV CALABRIA,DEPT PHYS,I-87036 COSENZA,ITALY. INFN,I-87036 COSENZA,ITALY. INST NUCL PHYS,PL-31342 KRAKOW,POLAND. STANISLAW STASZIC UNIV MIN & MET,INST PHYS & NUCL TECHNIQUES,PL-30059 KRAKOW,POLAND. JAGIELLONIAN UNIV,DEPT PHYS,PL-30059 KRAKOW,POLAND. DESY,W-2000 HAMBURG 52,GERMANY. UNIV FLORENCE,I-50125 FLORENCE,ITALY. INFN,I-50125 FLORENCE,ITALY. INFN,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. UNIV FREIBURG,INST PHYS,W-7800 FREIBURG,GERMANY. UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW G12 8QQ,SCOTLAND. UNIV HAMBURG,INST EXPTL PHYS 1,W-2000 HAMBURG 13,GERMANY. UNIV HAMBURG,INST EXPTL PHYS 2,W-2000 HAMBURG 50,GERMANY. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,HIGH ENERGY NUCL PHYS GRP,LONDON SW7 2BZ,ENGLAND. UNIV IOWA,DEPT PHYS & ASTRON,IOWA CITY,IA 52240. FORSCHUNGZENTRUM JULICH,INST KERNPHYS,W-5170 JULICH 1,GERMANY. LOUISIANA STATE UNIV,DEPT PHYS & ASTRON,BATON ROUGE,LA 70803. UNIV AUTONOMA MADRID,DEPT FIS TEOR,E-28049 MADRID,SPAIN. UNIV MANITOBA,DEPT PHYS,WINNIPEG R3T 2N2,MANITOBA,CANADA. MCGILL UNIV,DEPT PHYS,MONTREAL H3A 2T8,QUEBEC,CANADA. MOSCOW MV LOMONOSOV STATE UNIV,INST NUCL PHYS,MOSCOW 117234,RUSSIA. NIKHEF,1009 DB AMSTERDAM,NETHERLANDS. OHIO STATE UNIV,DEPT PHYS,COLUMBUS,OH 43210. UNIV OXFORD,DEPT PHYS,OXFORD,ENGLAND. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. INFN,I-35131 PADUA,ITALY. PENN STATE UNIV,DEPT PHYS,UNIV PK,PA 16802. UNIV ROME LA SAPIENZA,DIPARTIMENTO FIS,I-00185 ROME,ITALY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064. UNIV GESAMTHSCH SIEGEN,FACHBEREICH PHYS,W-5900 SIEGEN 21,GERMANY. TEL AVIV UNIV,SCH PHYS,IL-69978 TEL AVIV,ISRAEL. UNIV TOKYO,INST NUCL STUDY,TOKYO 188,JAPAN. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. INFN,I-10125 TURIN,ITALY. UNIV TORINO,FAC SCI MFN,ALESSANDRIA,ITALY. UNIV TORONTO,DEPT PHYS,TORONTO M5S 1A7,ONTARIO,CANADA. UNIV LONDON UNIV COLL,DEPT PHYS & ASTRON,LONDON WC1E 6BT,ENGLAND. VIRGINIA POLYTECH INST & STATE UNIV,DEPT PHYS,BLACKSBURG,VA 24061. UNIV WARSAW,INST EXPTL PHYS,PL-00681 WARSAW,POLAND. INST NUCL STUDIES,WARSAW,POLAND. WEIZMANN INST SCI,DEPT NUCL PHYS,IL-76100 REHOVOT,ISRAEL. UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706. YORK UNIV,DEPT PHYS,N YORK,ON,CANADA. IROE,FLORENCE,ITALY. RP DERRICK, M (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. RI De Pasquale, Salvatore/B-9165-2008; Lancaster, Mark/C-1693-2008; Doyle, Anthony/C-5889-2009; Golubkov, Yury/E-1643-2012; Wiggers, Leo/B-5218-2015; Morandin, Mauro/A-3308-2016; Frasconi, Franco/K-1068-2016; Weihs, Wolfgang/E-8005-2017; OI Levi, Giuseppe/0000-0003-1714-6359; Anzivino, Giuseppina/0000-0002-5967-0952; De Pasquale, Salvatore/0000-0001-9236-0748; iori, maurizio/0000-0002-6349-0380; Lancaster, Mark/0000-0002-8872-7292; Brook, Nicholas/0000-0002-1818-0113; Doyle, Anthony/0000-0001-6322-6195; Wiggers, Leo/0000-0003-1060-0520; Morandin, Mauro/0000-0003-4708-4240; Frasconi, Franco/0000-0003-4204-6587; Weihs, Wolfgang/0000-0003-0884-0947; Castellini, Guido/0000-0002-0177-0643 NR 41 TC 88 Z9 88 U1 0 U2 4 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 DEC 31 PY 1992 VL 297 IS 3-4 BP 404 EP 416 DI 10.1016/0370-2693(92)91280-M PG 13 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KF698 UT WOS:A1992KF69800030 ER PT J AU BUSKULIC, D DECAMP, D GOY, C LEES, JP MINARD, MN MOURS, B ALEMANY, R ARIZTIZABAL, F COMAS, P CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L MATTISON, T PACHECO, A PADILLA, C PASCUAL, A CREANZA, D DEPALMA, M FARILLA, A IASELLI, G MAGGI, G MAGGI, M NATALI, S NUZZO, S QUATTROMINI, M RANIERI, A RASO, G ROMANO, F RUGGIERI, F SELVAGGI, G SILVESTRIS, L TEMPESTA, P ZITO, G HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W BAUERDICK, LAT BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J CASPER, D DREVERMANN, H FORTY, RW GANIS, G GAY, C HAGELBERG, R HARVEY, J HAYWOOD, S HILGART, J JACOBSEN, R JOST, B KNOBLOCH, J LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARTINEZ, M MATO, P MEINHARD, H MINTEN, A MIQUEL, R MOSER, HG PALAZZI, P PERLAS, JA PUSZTASZERI, JF RANJARD, F REDLINGER, G ROLANDI, L ROTHBERG, J RUAN, T SAICH, M SCHLATTER, D SCHMELLING, M SEFKOW, F TEJESSY, W WACHSMUTH, H WIEDENMANN, W WILDISH, T WITZELING, W WOTSCHACK, J AJALTOUNI, Z BADAUD, F BARDADINOTWINOWSKA, M BENCHEIKH, AM ELFELLOUS, R FALVARD, A GAY, P GUICHENEY, C HENRARD, P JOUSSET, J MICHEL, B MONTRET, JC PALLIN, D PERRET, P PIETRZYK, B PRORIOL, J PRULHIERE, F STIMPFL, G FEARNLEY, T HANSEN, JD HANSEN, JR MOLLERUD, R NILSSON, BS EFTHYMIOPOULOS, I KYRIAKIS, A SIMOPOULOU, E VAYAKI, A ZACHARIADOU, K BADIER, J BLONDEL, A BONNEAUD, G BRIENT, JC FOUQUE, G ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VERDERI, M VIDEAU, H CANDLIN, DJ PARSONS, MI VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C IKEDA, M LANNUTTI, J LEVINTHAL, D MERMIKIDES, M SAWYER, L WASSERBAECH, S ANTONELLI, A BALDINI, R BENCIVENNI, G BOLOGNA, G CAMPANA, P CAPON, G CERUTTI, F CHIARELLA, V DETTORREPIAZZOLI, B FELICI, G LAURELLI, P MANNOCCHI, G MURTAS, F MURTAS, GP PASSALACQUA, L PEPEALTARELLI, M PICCHI, P ALTOON, B BOYLE, O COLRAIN, P TENHAVE, I LYNCH, JG MAITLAND, W MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O GEWENIGER, C HANKE, P HEPP, V KLUGE, EE MAUMARY, Y PUTZER, A RENSCH, B STAHL, A TITTEL, K WUNSCH, M BELK, AT BEUSELINCK, R BINNIE, DM CAMERON, W CATTANEO, M COLLING, DJ DORNAN, PJ DUGEAY, S GREENE, AM HASSARD, JF LIESKE, NM NASH, J PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TOMALIN, IR WRIGHT, AG KNERINGER, E KUHN, D RUDOLPH, G BOWDERY, CK BRODBECK, TJ FINCH, AJ FOSTER, F HUGHES, G JACKSON, D KEEMER, NR NUTTALL, M PATEL, A SLOAN, T SNOW, SW WHELAN, EP KLEINKNECHT, K RAAB, J RENK, B SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P QIAN, Z ROOS, L ROUSSEAU, D SCHWEMLING, P TALBY, M ADLUNG, S BAUER, C BLUM, W BROWN, D CATTANEO, P COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M FRANK, M HALLEY, AW LAUBER, J LUTJENS, G LUTZ, G MANNER, W RICHTER, R ROTSCHEIDT, H SCHRODER, J SCHWARZ, AS SETTLES, R SEYWERD, H STIERLIN, U STIEGLER, U STDENIS, R TAKASHIMA, M THOMAS, J WOLF, G BOUCROT, J CALLOT, O CORDIER, A DAVIER, M GRIVAZ, JF HEUSSE, P JAFFE, DE JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM SCHUNE, MH VEILLET, JJ VIDEAU, I ZHANG, Z ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BOZZI, C BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GIASSI, A GIORGI, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F RIZZO, G SANGUINETTI, G SPAGNOLO, P STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MIR, LM MEDCALF, T QUAZI, IS STRONG, JA WEST, LR BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P DUARTE, H KOZANECKI, W LEMAIRE, MC LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J MOHAND, DS VALLAGE, B JOHNSON, RP LITKE, AM TAYLOR, G WEAR, J ASHMAN, JG BABBAGE, W BOOTH, CN BUTTAR, C CARNEY, RE CARTWRIGHT, S COMBLEY, F HATFIELD, F REEVES, P THOMPSON, LF BARBERIO, E BOHRER, A BRANDT, S GRUPEN, C RIVERA, F SCHAFER, U GIANNINI, G GOBBO, B RAGUSA, F BELLANTONI, L CHEN, W CINABRO, D CONWAY, JS COWEN, DF FENG, Z FERGUSON, DPS GAO, YS GRAHL, J HARTON, JL JARED, RC LECLAIRE, BW LISHKA, C PAN, YB PATER, JR SAADI, Y SHARMA, V SCHMITT, M SHI, ZH WALSH, AM WEBER, FV WHITNEY, MH WU, SL WU, X ZOBERNIG, G AF BUSKULIC, D DECAMP, D GOY, C LEES, JP MINARD, MN MOURS, B ALEMANY, R ARIZTIZABAL, F COMAS, P CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L MATTISON, T PACHECO, A PADILLA, C PASCUAL, A CREANZA, D DEPALMA, M FARILLA, A IASELLI, G MAGGI, G MAGGI, M NATALI, S NUZZO, S QUATTROMINI, M RANIERI, A RASO, G ROMANO, F RUGGIERI, F SELVAGGI, G SILVESTRIS, L TEMPESTA, P ZITO, G HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W BAUERDICK, LAT BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J CASPER, D DREVERMANN, H FORTY, RW GANIS, G GAY, C HAGELBERG, R HARVEY, J HAYWOOD, S HILGART, J JACOBSEN, R JOST, B KNOBLOCH, J LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARTINEZ, M MATO, P MEINHARD, H MINTEN, A MIQUEL, R MOSER, HG PALAZZI, P PERLAS, JA PUSZTASZERI, JF RANJARD, F REDLINGER, G ROLANDI, L ROTHBERG, J RUAN, T SAICH, M SCHLATTER, D SCHMELLING, M SEFKOW, F TEJESSY, W WACHSMUTH, H WIEDENMANN, W WILDISH, T WITZELING, W WOTSCHACK, J AJALTOUNI, Z BADAUD, F BARDADINOTWINOWSKA, M BENCHEIKH, AM ELFELLOUS, R FALVARD, A GAY, P GUICHENEY, C HENRARD, P JOUSSET, J MICHEL, B MONTRET, JC PALLIN, D PERRET, P PIETRZYK, B PRORIOL, J PRULHIERE, F STIMPFL, G FEARNLEY, T HANSEN, JD HANSEN, JR MOLLERUD, R NILSSON, BS EFTHYMIOPOULOS, I KYRIAKIS, A SIMOPOULOU, E VAYAKI, A ZACHARIADOU, K BADIER, J BLONDEL, A BONNEAUD, G BRIENT, JC FOUQUE, G ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VERDERI, M VIDEAU, H CANDLIN, DJ PARSONS, MI VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C IKEDA, M LANNUTTI, J LEVINTHAL, D MERMIKIDES, M SAWYER, L WASSERBAECH, S ANTONELLI, A BALDINI, R BENCIVENNI, G BOLOGNA, G CAMPANA, P CAPON, G CERUTTI, F CHIARELLA, V DETTORREPIAZZOLI, B FELICI, G LAURELLI, P MANNOCCHI, G MURTAS, F MURTAS, GP PASSALACQUA, L PEPEALTARELLI, M PICCHI, P ALTOON, B BOYLE, O COLRAIN, P TENHAVE, I LYNCH, JG MAITLAND, W MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O GEWENIGER, C HANKE, P HEPP, V KLUGE, EE MAUMARY, Y PUTZER, A RENSCH, B STAHL, A TITTEL, K WUNSCH, M BELK, AT BEUSELINCK, R BINNIE, DM CAMERON, W CATTANEO, M COLLING, DJ DORNAN, PJ DUGEAY, S GREENE, AM HASSARD, JF LIESKE, NM NASH, J PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TOMALIN, IR WRIGHT, AG KNERINGER, E KUHN, D RUDOLPH, G BOWDERY, CK BRODBECK, TJ FINCH, AJ FOSTER, F HUGHES, G JACKSON, D KEEMER, NR NUTTALL, M PATEL, A SLOAN, T SNOW, SW WHELAN, EP KLEINKNECHT, K RAAB, J RENK, B SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P QIAN, Z ROOS, L ROUSSEAU, D SCHWEMLING, P TALBY, M ADLUNG, S BAUER, C BLUM, W BROWN, D CATTANEO, P COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M FRANK, M HALLEY, AW LAUBER, J LUTJENS, G LUTZ, G MANNER, W RICHTER, R ROTSCHEIDT, H SCHRODER, J SCHWARZ, AS SETTLES, R SEYWERD, H STIERLIN, U STIEGLER, U STDENIS, R TAKASHIMA, M THOMAS, J WOLF, G BOUCROT, J CALLOT, O CORDIER, A DAVIER, M GRIVAZ, JF HEUSSE, P JAFFE, DE JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM SCHUNE, MH VEILLET, JJ VIDEAU, I ZHANG, Z ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BOZZI, C BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GIASSI, A GIORGI, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F RIZZO, G SANGUINETTI, G SPAGNOLO, P STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MIR, LM MEDCALF, T QUAZI, IS STRONG, JA WEST, LR BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P DUARTE, H KOZANECKI, W LEMAIRE, MC LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J MOHAND, DS VALLAGE, B JOHNSON, RP LITKE, AM TAYLOR, G WEAR, J ASHMAN, JG BABBAGE, W BOOTH, CN BUTTAR, C CARNEY, RE CARTWRIGHT, S COMBLEY, F HATFIELD, F REEVES, P THOMPSON, LF BARBERIO, E BOHRER, A BRANDT, S GRUPEN, C RIVERA, F SCHAFER, U GIANNINI, G GOBBO, B RAGUSA, F BELLANTONI, L CHEN, W CINABRO, D CONWAY, JS COWEN, DF FENG, Z FERGUSON, DPS GAO, YS GRAHL, J HARTON, JL JARED, RC LECLAIRE, BW LISHKA, C PAN, YB PATER, JR SAADI, Y SHARMA, V SCHMITT, M SHI, ZH WALSH, AM WEBER, FV WHITNEY, MH WU, SL WU, X ZOBERNIG, G TI A PRECISE MEASUREMENT OF THE TAU-LEPTON LIFETIME SO PHYSICS LETTERS B LA English DT Article ID Z-DECAYS AB Three different techniques are used to measure the mean decay length of the tau lepton with a high precision vertex detector in a sample of 11 800 tau pairs coming from Z decays, collected in 1991 by ALEPH at LEP. Events in which both tau's decay into one charged track are analyzed using two largely independent methods. Displaced vertices in three-prong decays yield another independent measurement. The derived lifetime is 295.5 +/- 5.9 +/- 3.1 fs, using m(tau) = 1777.1 +/- 0.5 MeV/c2. Including previous (1989-1990) ALEPH measurements, the combined tau lifetime is 294.7 +/- 5.4 +/- 3.0 fs. C1 UNIV AUTONOMA BARCELONA, INST FIS ALTES ENERGIES, E-08193 BARCELONA, SPAIN. UNIV BARI, DIPARTIMENTO FIS, I-70126 BARI, ITALY. INFN, I-70126 BARI, ITALY. CHINESE ACAD SCI, INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA. CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND. UNIV CLERMONT FERRAND, PHYS CORPUSCULAIRE LAB, CNRS, IN2P3, F-63177 CLERMONT FERRAND, FRANCE. NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK. DEMOCRITOS NUCL RES CTR, ATHENS, GREECE. ECOLE POLYTECH, PHYS NUCL & HAUTES ENERGIES LAB, CNRS, IN2P3, F-91128 PALAISEAU, FRANCE. UNIV EDINBURGH, DEPT PHYS, EDINBURGH EH9 3JZ, MIDLOTHIAN, SCOTLAND. UNIV FLORENCE, DIPARTIMENTO FIS, INFN, I-50125 FLORENCE, ITALY. FLORIDA STATE UNIV, SUPER COMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA. FLORIDA STATE UNIV, DEPT PHYS, TALLAHASSEE, FL 32306 USA. INFN, LAB NAZL, I-00044 FRASCATI, ITALY. UNIV GLASGOW, INST HOCHENERGIEPHYS, GLASGOW G12 8QQ, SCOTLAND. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, DEPT PHYS, LONDON SW7 2BZ, ENGLAND. UNIV INNSBRUCK, INST EXPTL PHYS, A-6020 INNSBRUCK, AUSTRIA. UNIV LANCASTER, DEPT PHYS, LANCASTER LA1 4YB, ENGLAND. UNIV MAINZ, INST PHYS, W-6500 MAINZ, GERMANY. FAC SCI LUMINY, CTR PHYS PARTICULES, CNRS, IN2P3, F-13288 MARSEILLE, FRANCE. MAX PLANCK INST PHYS & ASTROPHYS, WERNER HEISENBERG INST, W-8000 MUNICH, GERMANY. UNIV PARIS 11, ACCELERATEUR LINEAIRE LAB, CNRS, IN2P3, F-91405 ORSAY, FRANCE. UNIV PISA, DIPARTIMENTO FIS, INFN, I-56100 PISA, ITALY. SCUOLA NORMALE SUPER PISA, I-56100 PISA, ITALY. UNIV LONDON, ROYAL HOLLOWAY & BEDFORD COLL, DEPT PHYS, SURREY TW20 0EX, ENGLAND. RUTHERFORD APPLETON LAB, DEPT PARTICLE PHYS, DIDCOT OX11 0QX, OXON, ENGLAND. LE SACLAY, SERV PHYS PARTICULES, DAPNIA, F-91191 GIF SUR YVETTE, FRANCE. UNIV CALIF SANTA CRUZ, MERRILL COLL, INST PARTICLE PHYS, SANTA CRUZ, CA 95064 USA. UNIV SHEFFIELD, DEPT PHYS, SHEFFIELD S3 7RH, S YORKSHIRE, ENGLAND. UNIV SIEGEN, FACHBEREICH PHYS, W-5900 SIEGEN, GERMANY. UNIV TRIESTE, DIPARTIMENTO FIS, I-34127 TRIESTE, ITALY. INFN, I-34127 TRIESTE, ITALY. UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA. UNIV WASHINGTON, SEATTLE, WA 98195 USA. CERN, DIV PPE, CH-1211 GENEVA 23, SWITZERLAND. LBL, BERKELEY, CA 94720 USA. RP BUSKULIC, D (reprint author), LAB PHYS PARTICULES, CNRS, IN2P3, F-74019 ANNECY LE VIEUX, FRANCE. RI Bosman, Martine/J-9917-2014; Fernandez, Enrique/L-5387-2014; Mir, Lluisa-Maria/G-7212-2015; ciocci, maria agnese /I-2153-2015; Hansen, John/B-9058-2015; Lusiani, Alberto/N-2976-2015; Marrocchesi, Pier Simone/N-9068-2015; Lusiani, Alberto/A-3329-2016; Murtas, Fabrizio/B-5729-2012; Booth, Christopher/B-5263-2016; Pacheco Pages, Andres/C-5353-2011; Ferrante, Isidoro/F-1017-2012; ANTONELLI, ANTONELLA/C-6238-2011; Buttar, Craig/D-3706-2011; Stahl, Achim/E-8846-2011; Passalacqua, Luca/F-5127-2011; St.Denis, Richard/C-8997-2012; Forti, Francesco/H-3035-2011; Focardi, Ettore/E-7376-2012; Venturi, Andrea/J-1877-2012; Perrier, Frederic/A-5953-2011; Rolandi, Luigi (Gigi)/E-8563-2013; Colas, Paul/F-2876-2013; Delfino, Manuel/A-1545-2012; OI Bosman, Martine/0000-0002-7290-643X; Fernandez, Enrique/0000-0002-6405-9488; Mir, Lluisa-Maria/0000-0002-4276-715X; ciocci, maria agnese /0000-0003-0002-5462; Hansen, John/0000-0002-8422-5543; Lusiani, Alberto/0000-0002-6876-3288; Marrocchesi, Pier Simone/0000-0003-1966-140X; Lusiani, Alberto/0000-0002-6876-3288; Booth, Christopher/0000-0002-6051-2847; Pacheco Pages, Andres/0000-0001-8210-1734; Ferrante, Isidoro/0000-0002-0083-7228; Stahl, Achim/0000-0002-8369-7506; Forti, Francesco/0000-0001-6535-7965; Focardi, Ettore/0000-0002-3763-5267; Rolandi, Luigi (Gigi)/0000-0002-0635-274X; Delfino, Manuel/0000-0002-9468-4751; Martinez Rodriguez, Manel/0000-0002-9763-9155; Miquel, Ramon/0000-0002-6610-4836 NR 30 TC 12 Z9 12 U1 0 U2 2 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 DEC 31 PY 1992 VL 297 IS 3-4 BP 432 EP 448 DI 10.1016/0370-2693(92)91283-F PG 17 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KF698 UT WOS:A1992KF69800033 ER PT J AU BUSKULIC, D DECAMP, D GOY, C LEES, JP MINARD, MN MOURS, B ALEMANY, R ARIZTIZABAL, F COMAS, P CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L PACHECO, A PASCUAL, A CREANZA, D DEPALMA, M FARILLA, A IASELLI, G MAGGI, G MAGGI, M NATALI, S NUZZO, S QUATTROMINI, M RANIERI, A RASO, G ROMANO, F RUGGIERI, F SELVAGGI, G SILVESTRIS, L TEMPESTA, P ZITO, G HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W ATWOOD, WB BAUERDICK, LAT BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J BURNETT, TH DREVERMANN, H FORTY, RW HAGELBERG, R HARVEY, J HAYWOOD, S HILGART, J JACOBSEN, R JOST, B KNOBLOCH, J LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARTINEZ, M MATO, P MATTISON, T MEINHARD, H MENARY, S MEYER, T MINTEN, A MIQUEL, R MOSER, HG PALAZZI, P PERLAS, JA PUSZTASZERI, JF RANJARD, F REDLINGER, G ROLANDI, L ROTH, A ROTHBERG, J RUAN, T SAICH, M SCHLATTER, D SCHMELLING, M SEFKOW, F TEJESSY, W WACHSMUTH, H WIEDENMANN, W WILDISH, T WITZELING, W WOTSCHACK, J AJALTOUNI, Z BADAUD, F BARDADINOTWINOWSKA, M BENCHEIKH, AM ELFELLOUS, R FALVARD, A GAY, P GUICHENEY, C HENRARD, P JOUSSET, J MICHEL, B MONTRET, JC PALLIN, D PERRET, P PIETRZYK, B PRORIOL, J PRULHIERE, F STIMPFL, G FEARNLEY, T HANSEN, JD HANSEN, JR HANSEN, PH MOLLERUD, R NILSSON, BS EFTHYMIOPOULOS, I KYRIAKIS, A SIMOPOULOU, E VAYAKI, A ZACHARIADOU, K BADIER, J BLONDEL, A BONNEAUD, G BRIENT, JC FOUQUE, G ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VERDERI, M VIDEAU, H CANDLIN, DJ PARSONS, MI VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C IKEDA, M LANNUTTI, J LEVINTHAL, D MERMIKIDES, M SAWYER, L WASSERBAECH, S ANTONELLI, A BALDINI, R BENCIVENNI, G BOLOGNA, G CAMPANA, P CAPON, G CERUTTI, F CHIARELLA, V DETTORREPIAZZOLI, B FELICI, G LAURELLI, P MANNOCCHI, G MURTAS, F MURTAS, GP PASSALACQUA, L PEPEALTARELLI, M PICCHI, P ALTOON, B BOYLE, O COLRAIN, P TENHAVE, I LYNCH, JG MAITLAND, W MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O GEIGES, R GEWENIGER, C HANKE, P HEPP, V KLUGE, EE MAUMARY, Y PUTZER, A RENSCH, B STAHL, A TITTEL, K WUNSCH, M BELK, AT BEUSELINCK, R BINNIE, DM CAMERON, W CATTANEO, M COLLING, DJ DORNAN, PJ DUGEAY, S GREENE, AM HASSARD, JF LIESKE, NM NASH, J PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TOMALIN, IR WRIGHT, AG KNERINGER, E KUHN, D RUDOLPH, G BOWDERY, CK BRODBECK, TJ FINCH, AJ FOSTER, F HUGHES, G JACKSON, D KEEMER, NR NUTTALL, M PATEL, A SLOAN, T SNOW, SW WHELAN, EP KLEINKNECHT, K RAAB, J RENK, B SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BERNARD, V BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P QIAN, Z ROUSSEAU, D SCHWEMLING, P TALBY, M ADLUNG, S BAUER, C BLUM, W BROWN, D COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M FRANK, M HALLEY, AW LAUBER, J LUTJENS, G LUTZ, G MANNER, W RICHTER, R ROTSCHEIDT, H SCHRODER, J SCHWARZ, AS SETTLES, R SEYWERD, H STIERLIN, U STIEGLER, U STDENIS, R TAKASHIMA, M THOMAS, J WOLF, G BERTIN, V BOUCROT, J CALLOT, O CHEN, X CORDIER, A DAVIER, M GRIVAZ, JF HEUSSE, P JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM SCHUNE, MH VEILLET, JJ VIDEAU, I ZHANG, Z ZOMER, F ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GIASSI, A GIORGI, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F RIZZO, G SANGUINETTI, G STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MIR, LM MEDCALF, T QUAZI, IS STRONG, JA WEST, LR BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P DUARTE, H KOZANECKI, W LEMAIRE, MC LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J MOHAND, DS VALLAGE, B JOHNSON, RP LITKE, AM TAYLOR, G WEAR, J ASHMAN, JG BABBAGE, W BOOTH, CN BUTTAR, C CARNEY, RE CARTWRIGHT, S COMBLEY, F HATFIELD, F REEVES, P THOMPSON, LF BARBERIO, E BOHRER, A BRANDT, S GRUPEN, C MIRABITO, L RIVERA, F SCHAFER, U GANIS, G GIANNINI, G GOBBO, B RAGUSA, F BELLANTONI, L CHEN, W CINABRO, D CONWAY, JS COWEN, DF FENG, Z FERGUSON, DPS GAO, YS GRAHL, J HARTON, JL JARED, RC LECLAIRE, BW LISHKA, C PAN, YB PATER, JR SAADI, Y SHARMA, V SCHMITT, M SHI, ZH WALSH, AM WEBER, FV WHITNEY, MH WU, SL WU, X ZOBERNIG, G AF BUSKULIC, D DECAMP, D GOY, C LEES, JP MINARD, MN MOURS, B ALEMANY, R ARIZTIZABAL, F COMAS, P CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L PACHECO, A PASCUAL, A CREANZA, D DEPALMA, M FARILLA, A IASELLI, G MAGGI, G MAGGI, M NATALI, S NUZZO, S QUATTROMINI, M RANIERI, A RASO, G ROMANO, F RUGGIERI, F SELVAGGI, G SILVESTRIS, L TEMPESTA, P ZITO, G HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W ATWOOD, WB BAUERDICK, LAT BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J BURNETT, TH DREVERMANN, H FORTY, RW HAGELBERG, R HARVEY, J HAYWOOD, S HILGART, J JACOBSEN, R JOST, B KNOBLOCH, J LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARTINEZ, M MATO, P MATTISON, T MEINHARD, H MENARY, S MEYER, T MINTEN, A MIQUEL, R MOSER, HG PALAZZI, P PERLAS, JA PUSZTASZERI, JF RANJARD, F REDLINGER, G ROLANDI, L ROTH, A ROTHBERG, J RUAN, T SAICH, M SCHLATTER, D SCHMELLING, M SEFKOW, F TEJESSY, W WACHSMUTH, H WIEDENMANN, W WILDISH, T WITZELING, W WOTSCHACK, J AJALTOUNI, Z BADAUD, F BARDADINOTWINOWSKA, M BENCHEIKH, AM ELFELLOUS, R FALVARD, A GAY, P GUICHENEY, C HENRARD, P JOUSSET, J MICHEL, B MONTRET, JC PALLIN, D PERRET, P PIETRZYK, B PRORIOL, J PRULHIERE, F STIMPFL, G FEARNLEY, T HANSEN, JD HANSEN, JR HANSEN, PH MOLLERUD, R NILSSON, BS EFTHYMIOPOULOS, I KYRIAKIS, A SIMOPOULOU, E VAYAKI, A ZACHARIADOU, K BADIER, J BLONDEL, A BONNEAUD, G BRIENT, JC FOUQUE, G ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VERDERI, M VIDEAU, H CANDLIN, DJ PARSONS, MI VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C IKEDA, M LANNUTTI, J LEVINTHAL, D MERMIKIDES, M SAWYER, L WASSERBAECH, S ANTONELLI, A BALDINI, R BENCIVENNI, G BOLOGNA, G CAMPANA, P CAPON, G CERUTTI, F CHIARELLA, V DETTORREPIAZZOLI, B FELICI, G LAURELLI, P MANNOCCHI, G MURTAS, F MURTAS, GP PASSALACQUA, L PEPEALTARELLI, M PICCHI, P ALTOON, B BOYLE, O COLRAIN, P TENHAVE, I LYNCH, JG MAITLAND, W MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O GEIGES, R GEWENIGER, C HANKE, P HEPP, V KLUGE, EE MAUMARY, Y PUTZER, A RENSCH, B STAHL, A TITTEL, K WUNSCH, M BELK, AT BEUSELINCK, R BINNIE, DM CAMERON, W CATTANEO, M COLLING, DJ DORNAN, PJ DUGEAY, S GREENE, AM HASSARD, JF LIESKE, NM NASH, J PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TOMALIN, IR WRIGHT, AG KNERINGER, E KUHN, D RUDOLPH, G BOWDERY, CK BRODBECK, TJ FINCH, AJ FOSTER, F HUGHES, G JACKSON, D KEEMER, NR NUTTALL, M PATEL, A SLOAN, T SNOW, SW WHELAN, EP KLEINKNECHT, K RAAB, J RENK, B SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BERNARD, V BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P QIAN, Z ROUSSEAU, D SCHWEMLING, P TALBY, M ADLUNG, S BAUER, C BLUM, W BROWN, D COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M FRANK, M HALLEY, AW LAUBER, J LUTJENS, G LUTZ, G MANNER, W RICHTER, R ROTSCHEIDT, H SCHRODER, J SCHWARZ, AS SETTLES, R SEYWERD, H STIERLIN, U STIEGLER, U STDENIS, R TAKASHIMA, M THOMAS, J WOLF, G BERTIN, V BOUCROT, J CALLOT, O CHEN, X CORDIER, A DAVIER, M GRIVAZ, JF HEUSSE, P JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM SCHUNE, MH VEILLET, JJ VIDEAU, I ZHANG, Z ZOMER, F ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GIASSI, A GIORGI, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F RIZZO, G SANGUINETTI, G STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MIR, LM MEDCALF, T QUAZI, IS STRONG, JA WEST, LR BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P DUARTE, H KOZANECKI, W LEMAIRE, MC LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J MOHAND, DS VALLAGE, B JOHNSON, RP LITKE, AM TAYLOR, G WEAR, J ASHMAN, JG BABBAGE, W BOOTH, CN BUTTAR, C CARNEY, RE CARTWRIGHT, S COMBLEY, F HATFIELD, F REEVES, P THOMPSON, LF BARBERIO, E BOHRER, A BRANDT, S GRUPEN, C MIRABITO, L RIVERA, F SCHAFER, U GANIS, G GIANNINI, G GOBBO, B RAGUSA, F BELLANTONI, L CHEN, W CINABRO, D CONWAY, JS COWEN, DF FENG, Z FERGUSON, DPS GAO, YS GRAHL, J HARTON, JL JARED, RC LECLAIRE, BW LISHKA, C PAN, YB PATER, JR SAADI, Y SHARMA, V SCHMITT, M SHI, ZH WALSH, AM WEBER, FV WHITNEY, MH WU, SL WU, X ZOBERNIG, G TI A MEASUREMENT OF THE B BARYON LIFETIME SO PHYSICS LETTERS B LA English DT Article ID HEAVY FLAVOR PRODUCTION; SEMILEPTONIC DECAYS; QUARK-MODEL; MESONS; ALEPH AB In 451 000 hadronic Z0 decays, recorded with the ALEPH detector at LEP, the yields of lambdal- and lambdal+ combinations are measured. Semileptonic decays of b baryons result in a signal of 122 +/- 18(stat.)+22/-23(syst.) lambdal- combinations. From a fit to the impact parameter distribution of the leptons in the lambdal- sample, the lifetime of b baryons is measured to be 1.12+0.32/-0.29(stat.) +/- 0.16(syst.) ps. C1 UNIV AUTONOMA BARCELONA, INST FIS ALTES ENERGIES, E-08193 BARCELONA, SPAIN. INFN, I-70126 BARI, ITALY. UNIV BARI, DIPARTIMENTO FIS, I-70126 BARI, ITALY. CHINESE ACAD SCI, INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA. CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND. UNIV CLERMONT FERRAND, PHYS CORPUSCULAIRE LAB, CNRS, IN2P3, F-63177 CLERMONT FERRAND, FRANCE. NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK. DEMOCRITOS NUCL RES CTR, GR-15310 ATHENS, GREECE. ECOLE POLYTECH, PHYS NUCL & HAUTES ENERGIES LAB, CNRS, IN2P3, F-91128 PALAISEAU, FRANCE. UNIV EDINBURGH, DEPT PHYS, EDINBURGH EH9 3JZ, MIDLOTHIAN, SCOTLAND. UNIV FLORENCE, DIPARTIMENTO FIS, INFN, I-50125 FLORENCE, ITALY. FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA. FLORIDA STATE UNIV, DEPT PHYS, TALLAHASSEE, FL 32306 USA. INFN, LAB NAZL, I-00044 FRASCATI, ITALY. UNIV GLASGOW, DEPT PHYS & ASTRON, GLASGOW G12 8QQ, SCOTLAND. UNIV HEIDELBERG, INST HOCHENERGIEPHYS, W-6900 HEIDELBERG, GERMANY. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, DEPT PHYS, LONDON SW7 2BZ, ENGLAND. UNIV INNSBRUCK, INST EXPTL PHYS, A-6020 INNSBRUCK, AUSTRIA. UNIV LANCASTER, DEPT PHYS, LANCASTER LA1 4YB, ENGLAND. UNIV MAINZ, INST PHYS, W-6500 MAINZ, GERMANY. FAC SCI LUMINY, CTR PHYS PARTICULES, CNRS, IN2P3, F-13288 MARSEILLE, FRANCE. MAX PLANCK INST PHYS & ASTROPHYS, WERNER HEISENBERG INST, W-8000 MUNICH, GERMANY. UNIV PARIS 11, ACCELERATEUR LINEAIRE LAB, CNRS, IN2P3, F-91405 ORSAY, FRANCE. UNIV PISA, DIPARTIMENTO FIS, INFN, I-56100 PISA, ITALY. SCUOLA NORMALE SUPER PISA, I-56100 PISA, ITALY. UNIV LONDON, ROYAL HOLLOWAY & BEDFORD COLL, DEPT PHYS, SURREY TW20 0EX, ENGLAND. RUTHERFORD APPLETON LAB, DEPT PARTICLE PHYS, DIDCOT OX11 0QX, OXON, ENGLAND. LE SACLAY, DAPNIA, SERV PHYS PARTICULE, F-91191 GIF SUR YVETTE, FRANCE. CERN, DIV PPE, CH-1211 GENEVA 23, SWITZERLAND. LBL, BERKELEY, CA 94720 USA. UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA. UNIV SHEFFIELD, DEPT PHYS, SHEFFIELD S10 2TN, S YORKSHIRE, ENGLAND. UNIV SIEGEN, FACHBEREICH PHYS, W-5900 SIEGEN, GERMANY. UNIV WASHINGTON, SEATTLE, WA 98195 USA. UNIV NAPLES, I-80138 NAPLES, ITALY. UNIV TRIESTE, DIPARTIMENTO FIS, I-34127 TRIESTE, ITALY. UNIV TURIN, IST FIS GEN, I-10124 TURIN, ITALY. INFN, I-34127 TRIESTE, ITALY. UNIV NAPLES, DIPARTIMENTO SCI FIS, I-80138 NAPLES, ITALY. UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA. UNIV NAPLES, DIPARTIMENTO SCI FIS, I-80138 NAPLES, ITALY. SLAC, STANFORD, CA 94309 USA. CNR, IST COSMO GEOFIS, TURIN, ITALY. RP BUSKULIC, D (reprint author), LAB PHYS PARTICULES, CNRS, IN2P3, F-74019 ANNECY LE VIEUX, FRANCE. RI Ligabue, Franco/F-3432-2014; Rizzo, Giuliana/A-8516-2015; Bosman, Martine/J-9917-2014; Fernandez, Enrique/L-5387-2014; Mir, Lluisa-Maria/G-7212-2015; ciocci, maria agnese /I-2153-2015; Hansen, John/B-9058-2015; Lusiani, Alberto/N-2976-2015; Marrocchesi, Pier Simone/N-9068-2015; Lusiani, Alberto/A-3329-2016; Murtas, Fabrizio/B-5729-2012; Booth, Christopher/B-5263-2016; Pacheco Pages, Andres/C-5353-2011; Ferrante, Isidoro/F-1017-2012; ANTONELLI, ANTONELLA/C-6238-2011; Buttar, Craig/D-3706-2011; Colas, Paul/F-2876-2013; Delfino, Manuel/A-1545-2012; Stahl, Achim/E-8846-2011; Passalacqua, Luca/F-5127-2011; St.Denis, Richard/C-8997-2012; Forti, Francesco/H-3035-2011; Focardi, Ettore/E-7376-2012; Venturi, Andrea/J-1877-2012; Perrier, Frederic/A-5953-2011; Rolandi, Luigi (Gigi)/E-8563-2013; OI Seywerd, Henry/0000-0003-4876-730X; Palazzi, Paolo/0000-0002-4861-391X; RASO, Giuseppe/0000-0002-5660-3711; Bottigli, Ubaldo/0000-0002-0666-3433; Ligabue, Franco/0000-0002-1549-7107; Bloch-Devaux, Brigitte/0000-0002-2463-1232; Rizzo, Giuliana/0000-0003-1788-2866; Murtas, Fabrizio/0000-0002-7041-6541; Garrido Beltran, Lluis/0000-0001-8883-6539; Edgecock, Rob/0000-0002-7896-3312; Bosman, Martine/0000-0002-7290-643X; Fernandez, Enrique/0000-0002-6405-9488; Mir, Lluisa-Maria/0000-0002-4276-715X; ciocci, maria agnese /0000-0003-0002-5462; Hansen, John/0000-0002-8422-5543; Lusiani, Alberto/0000-0002-6876-3288; Marrocchesi, Pier Simone/0000-0003-1966-140X; Lusiani, Alberto/0000-0002-6876-3288; Booth, Christopher/0000-0002-6051-2847; Pacheco Pages, Andres/0000-0001-8210-1734; Ferrante, Isidoro/0000-0002-0083-7228; Delfino, Manuel/0000-0002-9468-4751; Stahl, Achim/0000-0002-8369-7506; Forti, Francesco/0000-0001-6535-7965; Focardi, Ettore/0000-0002-3763-5267; Rolandi, Luigi (Gigi)/0000-0002-0635-274X; Miquel, Ramon/0000-0002-6610-4836 NR 23 TC 27 Z9 27 U1 0 U2 2 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 DEC 31 PY 1992 VL 297 IS 3-4 BP 449 EP 458 DI 10.1016/0370-2693(92)91284-G PG 10 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KF698 UT WOS:A1992KF69800034 ER PT J AU BUSKULIC, D DECAMP, D GOY, C LEES, JP MINARD, MN MOURS, B ALEMANY, R ARIZTIZABAL, F COMAS, P CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L MATTISON, T PACHECO, A PASCUAL, A CREANZA, D DEPALMA, M FARILLA, A IASELLI, G MAGGI, G MAGGI, M NATALI, S NUZZO, S QUATTROMINI, M RANIERI, A RASO, G ROMANO, F RUGGIERI, F SELVAGGI, G SILVESTRIS, L TEMPESTA, P ZITO, G HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W BAUERDICK, LAT BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J CASPER, D DREVERMANN, H FORTY, RW GANIS, G GAY, C HAGELBERG, R HARVEY, J HAYWOOD, S HILGART, J JACOBSEN, R JOST, B KNOBLOCH, J LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARTINEZ, M MATO, P MEINHARD, H MINTEN, A MIQUEL, R MOSER, HG PALAZZI, P PERLAS, JA PUSZTASZERI, JF RANJARD, F REDLINGER, G ROLANDI, L ROTHBERG, J RUAN, T SAICH, M SCHLATTER, D SCHMELLING, M SEFKOW, F TEJESSY, W WACHSMUTH, H WIEDENMANN, W WILDISH, T WITZELING, W WOTSCHACK, J AJALTOUNI, Z BADAUD, F BARDADINOTWINOWSKA, M BENCHEIKH, AM ELFELLOUS, R FALVARD, A GAY, P GUICHENEY, C HENRARD, P JOUSSET, J MICHEL, B MONTRET, JC PALLIN, D PERRET, P PIETRZYK, B PRORIOL, J PRULHIERE, F STIMPFL, G FEARNLEY, T HANSEN, JD HANSEN, JR HANSEN, PH MOLLERUD, R NILSSON, BS EFTHYMIOPOULOS, I KYRIAKIS, A SIMOPOULOU, E VAYAKI, A ZACHARIADOU, K BADIER, J BLONDEL, A BONNEAUD, G BRIENT, JC FOUQUE, G ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VERDERI, M VIDEAU, H CANDLIN, DJ PARSONS, MI VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C IKEDA, M LANNUTTI, J LEVINTHAL, D MERMIKIDES, M SAWYER, L WASSERBAECH, S ANTONELLI, A BALDINI, R BENCIVENNI, G BOLOGNA, G CAMPANA, P CAPON, G CERUTTI, F CHIARELLA, V DETTORREPIAZZOLI, B FELICI, G LAURELLI, P MANNOCCHI, G MURTAS, F MURTAS, GP PASSALACQUA, L PEPEALTARELLI, M PICCHI, P ALTOON, B BOYLE, O COLRAIN, P TENHAVE, I LYNCH, JG MAITLAND, W MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O FISCHER, T GEWENIGER, C HANKE, P HEPP, V KLUGE, EE MAUMARY, Y PUTZER, A RENSCH, B STAHL, A TITTEL, K WUNSCH, M BELK, AT BEUSELINCK, R BINNIE, DM CAMERON, W CATTANEO, M COLLING, DJ DORNAN, PJ DUGEAY, S GREENE, AM HASSARD, JF LIESKE, NM NASH, J PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TOMALIN, IR WRIGHT, AG KNERINGER, E KUHN, D RUDOLPH, G BOWDERY, CK BRODBECK, TJ FINCH, AJ FOSTER, F HUGHES, G JACKSON, D KEEMER, NR NUTTALL, M PATEL, A SLOAN, T SNOW, SW WHELAN, EP KLEINKNECHT, K RAAB, J RENK, B SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P QIAN, Z ROOS, L ROUSSEAU, D SCHWEMLING, P TALBY, M ADLUNG, S BAUER, C BLUM, W BROWN, D CATTANEO, P COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M FRANK, M HALLEY, AW LAUBER, J LUTJENS, G LUTZ, G MANNER, W RICHTER, R ROTSCHEIDT, H SCHRODER, J SCHWARZ, AS SETTLES, R SEYWERD, H STIERLIN, U STIEGLER, U STDENIS, R TAKASHIMA, M THOMAS, J WOLF, G BOUCROT, J CALLOT, O CORDIER, A DAVIER, M GRIVAZ, JF HEUSSE, P JAFFE, DE JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM SCHUNE, MH VEILLET, JJ VIDEAU, I ZHANG, Z ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BOZZI, C BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GIASSI, A GIORGIZ, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F RIZZO, G SANGUINETTI, G SPAGNOLO, P STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MIR, LM MEDCALF, T QUAZI, IS STRONG, JA WEST, LR BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P DUARTE, H KOZANECKI, W LEMAIRE, MC LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J MOHAND, DS VALLAGE, B JOHNSON, RP LITKE, AM TAYLOR, G WEAR, J ASHMAN, JG BABBAGE, W BOOTH, CN BUTTAR, C CARNEY, RE CARTWRIGHT, S COMBLEY, F HATFIELD, F REEVES, P THOMPSON, LF BARBERIO, E BOHRER, A BRANDT, S GRUPEN, C MIRABITO, L RIVERA, F SCHAFER, U GIANNINI, G GOBBO, B RAGUSA, F BELLANTONI, L CHEN, W CINABRO, D CONWAY, JS COWEN, DF FENG, Z FERGUSON, DPS GAO, YS GRAHL, J HARTON, JL JARED, RC LECLAIRE, BW LISHKA, C PAN, YB PATER, JR SAADI, Y SHARMA, V SCHMITT, M SHI, ZH WALSH, AM WEBER, FV WHITNEY, MH WU, SL WU, X ZOBERNIG, G AF BUSKULIC, D DECAMP, D GOY, C LEES, JP MINARD, MN MOURS, B ALEMANY, R ARIZTIZABAL, F COMAS, P CRESPO, JM DELFINO, M FERNANDEZ, E GAITAN, V GARRIDO, L MATTISON, T PACHECO, A PASCUAL, A CREANZA, D DEPALMA, M FARILLA, A IASELLI, G MAGGI, G MAGGI, M NATALI, S NUZZO, S QUATTROMINI, M RANIERI, A RASO, G ROMANO, F RUGGIERI, F SELVAGGI, G SILVESTRIS, L TEMPESTA, P ZITO, G HU, H HUANG, D HUANG, X LIN, J LOU, J QIAO, C WANG, T XIE, Y XU, D XU, R ZHANG, J ZHAO, W BAUERDICK, LAT BLUCHER, E BONVICINI, G BOSSI, F BOUDREAU, J CASPER, D DREVERMANN, H FORTY, RW GANIS, G GAY, C HAGELBERG, R HARVEY, J HAYWOOD, S HILGART, J JACOBSEN, R JOST, B KNOBLOCH, J LANCON, E LEHRAUS, I LOHSE, T LUSIANI, A MARTINEZ, M MATO, P MEINHARD, H MINTEN, A MIQUEL, R MOSER, HG PALAZZI, P PERLAS, JA PUSZTASZERI, JF RANJARD, F REDLINGER, G ROLANDI, L ROTHBERG, J RUAN, T SAICH, M SCHLATTER, D SCHMELLING, M SEFKOW, F TEJESSY, W WACHSMUTH, H WIEDENMANN, W WILDISH, T WITZELING, W WOTSCHACK, J AJALTOUNI, Z BADAUD, F BARDADINOTWINOWSKA, M BENCHEIKH, AM ELFELLOUS, R FALVARD, A GAY, P GUICHENEY, C HENRARD, P JOUSSET, J MICHEL, B MONTRET, JC PALLIN, D PERRET, P PIETRZYK, B PRORIOL, J PRULHIERE, F STIMPFL, G FEARNLEY, T HANSEN, JD HANSEN, JR HANSEN, PH MOLLERUD, R NILSSON, BS EFTHYMIOPOULOS, I KYRIAKIS, A SIMOPOULOU, E VAYAKI, A ZACHARIADOU, K BADIER, J BLONDEL, A BONNEAUD, G BRIENT, JC FOUQUE, G ORTEU, S ROSOWSKY, A ROUGE, A RUMPF, M TANAKA, R VERDERI, M VIDEAU, H CANDLIN, DJ PARSONS, MI VEITCH, E MONETA, L PARRINI, G CORDEN, M GEORGIOPOULOS, C IKEDA, M LANNUTTI, J LEVINTHAL, D MERMIKIDES, M SAWYER, L WASSERBAECH, S ANTONELLI, A BALDINI, R BENCIVENNI, G BOLOGNA, G CAMPANA, P CAPON, G CERUTTI, F CHIARELLA, V DETTORREPIAZZOLI, B FELICI, G LAURELLI, P MANNOCCHI, G MURTAS, F MURTAS, GP PASSALACQUA, L PEPEALTARELLI, M PICCHI, P ALTOON, B BOYLE, O COLRAIN, P TENHAVE, I LYNCH, JG MAITLAND, W MORTON, WT RAINE, C SCARR, JM SMITH, K THOMPSON, AS TURNBULL, RM BRANDL, B BRAUN, O FISCHER, T GEWENIGER, C HANKE, P HEPP, V KLUGE, EE MAUMARY, Y PUTZER, A RENSCH, B STAHL, A TITTEL, K WUNSCH, M BELK, AT BEUSELINCK, R BINNIE, DM CAMERON, W CATTANEO, M COLLING, DJ DORNAN, PJ DUGEAY, S GREENE, AM HASSARD, JF LIESKE, NM NASH, J PATTON, SJ PAYNE, DG PHILLIPS, MJ SEDGBEER, JK TOMALIN, IR WRIGHT, AG KNERINGER, E KUHN, D RUDOLPH, G BOWDERY, CK BRODBECK, TJ FINCH, AJ FOSTER, F HUGHES, G JACKSON, D KEEMER, NR NUTTALL, M PATEL, A SLOAN, T SNOW, SW WHELAN, EP KLEINKNECHT, K RAAB, J RENK, B SANDER, HG SCHMIDT, H STEEG, F WALTHER, SM WOLF, B AUBERT, JJ BENCHOUK, C BONISSENT, A CARR, J COYLE, P DRINKARD, J ETIENNE, F PAPALEXIOU, S PAYRE, P QIAN, Z ROOS, L ROUSSEAU, D SCHWEMLING, P TALBY, M ADLUNG, S BAUER, C BLUM, W BROWN, D CATTANEO, P COWAN, G DEHNING, B DIETL, H DYDAK, F FERNANDEZBOSMAN, M FRANK, M HALLEY, AW LAUBER, J LUTJENS, G LUTZ, G MANNER, W RICHTER, R ROTSCHEIDT, H SCHRODER, J SCHWARZ, AS SETTLES, R SEYWERD, H STIERLIN, U STIEGLER, U STDENIS, R TAKASHIMA, M THOMAS, J WOLF, G BOUCROT, J CALLOT, O CORDIER, A DAVIER, M GRIVAZ, JF HEUSSE, P JAFFE, DE JANOT, P KIM, DW LEDIBERDER, F LEFRANCOIS, J LUTZ, AM SCHUNE, MH VEILLET, JJ VIDEAU, I ZHANG, Z ABBANEO, D AMENDOLIA, SR BAGLIESI, G BATIGNANI, G BOSISIO, L BOTTIGLI, U BOZZI, C BRADASCHIA, C CARPINELLI, M CIOCCI, MA DELLORSO, R FERRANTE, I FIDECARO, F FOA, L FOCARDI, E FORTI, F GIASSI, A GIORGIZ, MA LIGABUE, F MANNELLI, EB MARROCCHESI, PS MESSINEO, A PALLA, F RIZZO, G SANGUINETTI, G SPAGNOLO, P STEINBERGER, J TENCHINI, R TONELLI, G TRIGGIANI, G VANNINI, C VENTURI, A VERDINI, PG WALSH, J CARTER, JM GREEN, MG MARCH, PV MIR, LM MEDCALF, T QUAZI, IS STRONG, JA WEST, LR BOTTERILL, DR CLIFFT, RW EDGECOCK, TR EDWARDS, M FISHER, SM JONES, TJ NORTON, PR SALMON, DP THOMPSON, JC BLOCHDEVAUX, B COLAS, P DUARTE, H KOZANECKI, W LEMAIRE, MC LOCCI, E LOUCATOS, S MONNIER, E PEREZ, P PERRIER, F RANDER, J RENARDY, JF ROUSSARIE, A SCHULLER, JP SCHWINDLING, J MOHAND, DS VALLAGE, B JOHNSON, RP LITKE, AM TAYLOR, G WEAR, J ASHMAN, JG BABBAGE, W BOOTH, CN BUTTAR, C CARNEY, RE CARTWRIGHT, S COMBLEY, F HATFIELD, F REEVES, P THOMPSON, LF BARBERIO, E BOHRER, A BRANDT, S GRUPEN, C MIRABITO, L RIVERA, F SCHAFER, U GIANNINI, G GOBBO, B RAGUSA, F BELLANTONI, L CHEN, W CINABRO, D CONWAY, JS COWEN, DF FENG, Z FERGUSON, DPS GAO, YS GRAHL, J HARTON, JL JARED, RC LECLAIRE, BW LISHKA, C PAN, YB PATER, JR SAADI, Y SHARMA, V SCHMITT, M SHI, ZH WALSH, AM WEBER, FV WHITNEY, MH WU, SL WU, X ZOBERNIG, G TI SEARCH FOR CP VIOLATION IN Z-]TAU-TAU SO PHYSICS LETTERS B LA English DT Article ID TAU-LEPTONS; E+E COLLIDERS; Z-DECAYS; T-ODD; APLANARITIES; TESTS AB Using the 18.8 pb-1 of data accumulated at LEP in 1990 and 1991 with the ALEPH detector, a direct test of neutral current CP-invariance is performed by a search for CP-odd correlations in Z decays to tau pairs where both tau decay modes are identified. No evidence for CP-violation is observed. The weak dipole moment of the tau has been measured to be d(tau)(m(Z)) = (1.3 +/- 1.4 +/- 0.1) x 10(-17)e.cm which results in an upper timit on the weak dipole moment of \d(tau)(m(Z))\ less-than-or-equal-to 3.7 x 10(-17)e.cm with 95% confidence level. C1 UNIV AUTONOMA BARCELONA, INST FIS ALTES ENERGIES, E-08193 BARCELONA, SPAIN. INFN, I-70126 BARI, ITALY. UNIV BARI, DIPARTIMENTO FIS, I-70126 BARI, ITALY. CHINESE ACAD SCI, INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA. CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND. UNIV CLERMONT FERRAND, PHYS CORPUSCULAIRE LAB, CNRS, IN2P3, F-63177 CLERMONT FERRAND, FRANCE. NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK. DEMOCRITOS NUCL RES CTR, GR-15310 ATHENS, GREECE. ECOLE POLYTECH, PHYS NUCL & HAUTES ENERGIE LAB, CNRS, IN2P3, F-91128 PALAISEAU, FRANCE. UNIV EDINBURGH, DEPT PHYS, EDINBURGH EH9 3JZ, MIDLOTHIAN, SCOTLAND. UNIV FLORENCE, DIPARTIMENTO FIS, INFN, I-50125 FLORENCE, ITALY. FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA. FLORIDA STATE UNIV, DEPT PHYS, TALLAHASSEE, FL 32306 USA. INFN, LAB NAZ, I-00044 FRASCATI, ITALY. UNIV GLASGOW, DEPT PHYS & ASTRON, GLASGOW G12 8QQ, SCOTLAND. UNIV HEIDELBERG, INST HOCHENERGIEPHYS, W-6900 HEIDELBERG, GERMANY. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, DEPT PHYS, LONDON SW7 2BZ, ENGLAND. UNIV INNSBRUCK, INST EXPTL PHYS, A-6020 INNSBRUCK, AUSTRIA. UNIV LANCASTER, DEPT PHYS, LANCASTER LA1 4YB, ENGLAND. UNIV MAINZ, INST PHYS, W-6500 MAINZ, GERMANY. FAC SCI LUMINY, CTR PHYS PARTICULES, CNRS, IN2P3, F-13288 MARSEILLE, FRANCE. MAX PLANCK INST PHYS & ASTROPHYS, WERNER HEISENBERG INST, W-8000 MUNICH, GERMANY. UNIV PARIS 11, ACCELERATEUR LINEAIRE LAB, CNRS, IN2P3, F-91405 ORSAY, FRANCE. UNIV PISA, DIPARTIMENTO FIS, INFN, I-56100 PISA, ITALY. SCUOLA NORMALE SUPER PISA, I-56100 PISA, ITALY. UNIV LONDON, ROYAL HOLLOWAY & BEDFORD COLL, DEPT PHYS, SURREY TW20 0EX, ENGLAND. RUTHERFORD APPLETON LAB, DEPT PARTICLE PHYS, DIDCOT OX11 0QX, OXON, ENGLAND. LE SACLAY, DAPNIA, SERV PHYS PARTICULE, F-91191 GIF SUR YVETTE, FRANCE. UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA. UNIV SHEFFIELD, DEPT PHYS, SHEFFIELD S10 2TN, S YORKSHIRE, ENGLAND. UNIV SIEGEN, FACHBEREICH PHYS, W-5900 SIEGEN, GERMANY. UNIV TRIESTE, DIPARTIMENTO FIS, I-34127 TRIESTE, ITALY. INFN, I-34127 TRIESTE, ITALY. UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA. SLAC, STANFORD, CA 94309 USA. UNIV WASHINGTON, SEATTLE, WA 98195 USA. UNIV NAPLES, I-80138 NAPLES, ITALY. UNIV TURIN, IST FIS GEN, I-10124 TURIN, ITALY. UNIV NAPLES, DIPARTIMENTO SCI FIS, I-80138 NAPLES, ITALY. CNR, IST COSMO GEOFIS, TURIN, ITALY. CERN, DIV PPE, CH-1211 GENEVA 23, SWITZERLAND. LBL, BERKELEY, CA 94720 USA. RP BUSKULIC, D (reprint author), LAB PHYS PARTICULES, CNRS, IN2P3, F-74019 ANNECY LE VIEUX, FRANCE. 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I VIERTEL, G VIKAS, P VIKAS, U VIVARGENT, M VOGEL, H VOGT, H VOROBIEV, I VOROBYOV, AA VUILLEUMIER, L WADHWA, M WALLRAFF, W WANG, CR WANG, GH WANG, JH WANG, XL YANG, YF WANG, ZM WEBER, A WEBER, J WEILL, R WENAUS, TJ WENNINGER, J WHITE, M WILLMOTT, C WITTGENSTEIN, F WRIGHT, D WU, RJ WU, SX WU, YG WYSLOUCH, B XIE, YY XU, YD XU, ZZ XUE, ZL YAN, DS YAN, XJ YANG, BZ YANG, CG YANG, G YANG, KS YANG, QY YANG, ZQ YE, CH YE, JB YE, Q YEH, SC YIN, ZW YOU, JM YUNUS, N YZERMAN, M ZACCARDELLI, C ZEMP, P ZENG, M ZENG, Y ZHANG, DH ZHANG, ZP ZHOU, B ZHOU, JF ZHU, RY ZHUANG, HL ZICHICHI, A VANDERZWAAN, BCC AF ADRIANI, O AGUILARBENITEZ, M AHLEN, S ALCARAZ, J ALOISIO, A ALVERSON, G ALVIGGI, MG AMBROSI, G AN, Q ANDERHUB, H ANDERSON, AL ANDREEV, VP ANGELOV, T ANTONOV, L ANTREASYAN, D ARCE, P AREFIEV, A ATAMANCHUK, A AZEMOON, T AZIZ, T BABA, PVKS BAGNAIA, P BAKKEN, JA BAKSAY, L BALL, RC BANERJEE, S BAO, J BARILLERE, R BARONE, L BASCHIROTTO, A BATTISTON, R BAY, A BECATTINI, F BECKER, U BEHNER, F BEHRENS, J 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T PAULUZZI, M PAUSS, F PEI, YJ PENSOTTI, S PERRETGALLIX, D PERRIER, J PEVSNER, A PICCOLO, D PIERI, M PIROUE, PA PLASIL, F PLYASKIN, V POHL, M POJIDAEV, V PRODUIT, N QIAN, JM QURESHI, KN RAGHAVAN, R RAHALCALLOT, G RANCOITA, PG RATTAGGI, M RAVEN, G RAZIS, P READ, K REN, D REN, Z RESCIGNO, M REUCROFT, S RICKER, A RIEMANN, S RIEMERS, W RILES, K RIND, O RIZVI, HA RODRIGUEZ, FJ ROE, BP ROHNER, M ROHNER, S ROMERO, L ROSE, J ROSIERLEES, S ROSMALEN, R ROSSELET, P RUBBIA, A RUBIO, JA RYKACZEWSKI, H SACHWITZ, M SALICIO, J SALICIO, JM SANDERS, GS SANTOCCHIA, A SARAKINOS, MS SARTORELLI, G SASSOWSKY, M SAUVAGE, G SCHEGELSKY, V SCHMITZ, D SCHMITZ, P SCHNEEGANS, M SCHOLZ, N SCHOPPER, H SCHOTANUS, DJ SCHREIBER, HJ SCHULTE, R SCHULTE, S SCHULTZE, K SCHWENKE, J SCHWERING, G SCIACCA, C SCOTT, I SEHGAL, R SEILER, PG SENS, JC SERVOLI, L SHEER, I SHEN, DZ SHEVCHENKO, S SHI, XR SHOTKIN, S SHUKLA, J SHUMILOV, E SHOUTKO, V SODERSTROM, E SON, D SOPCZAK, A SPARTIOTIS, C SPICKERMANN, T SPILLANTINI, P STAROSTA, R STEUER, M STICKLAND, DP STICOZZI, F STONE, H STRAUCH, K STRINGFELLOW, BC SUDHAKAR, K SULTANOV, G SUMNER, RL SUN, LZ SUTER, H SUTTON, RB SWAIN, JD SYED, AA TANG, XW TAYLOR, L TERZI, G TIMMERMANS, C TING, SCC TING, SM TONUTTI, M TONWAR, SC TOTH, J TSAREGORODTSEV, A TSIPOLITIS, G TULLY, C TUNG, KL ULBRICHT, J URBAN, L UWER, U VALENTE, E VANDEWALLE, RT VETLITSKY, I VIERTEL, G VIKAS, P VIKAS, U VIVARGENT, M VOGEL, H VOGT, H VOROBIEV, I VOROBYOV, AA VUILLEUMIER, L WADHWA, M WALLRAFF, W WANG, CR WANG, GH WANG, JH WANG, XL YANG, YF WANG, ZM WEBER, A WEBER, J WEILL, R WENAUS, TJ WENNINGER, J WHITE, M WILLMOTT, C WITTGENSTEIN, F WRIGHT, D WU, RJ WU, SX WU, YG WYSLOUCH, B XIE, YY XU, YD XU, ZZ XUE, ZL YAN, DS YAN, XJ YANG, BZ YANG, CG YANG, G YANG, KS YANG, QY YANG, ZQ YE, CH YE, JB YE, Q YEH, SC YIN, ZW YOU, JM YUNUS, N YZERMAN, M ZACCARDELLI, C ZEMP, P ZENG, M ZENG, Y ZHANG, DH ZHANG, ZP ZHOU, B ZHOU, JF ZHU, RY ZHUANG, HL ZICHICHI, A VANDERZWAAN, BCC TI SEARCH FOR ANOMALOUS PRODUCTION OF SINGLE-PHOTON EVENTS IN E+E- ANNIHILATIONS AT THE Z RESONANCE SO PHYSICS LETTERS B LA English DT Article ID COMPOSITE-Z; Z-BOSON; COLLISIONS; NEUTRINOS; COUPLINGS; DECAY AB Using a sample of e+e- annihilation events collected at the Z resonance corresponding to an integrated luminosity of 11.2 pb-1, we have searched for gammaX final states where X represents stable, weakly interacting particles and the energy of the photon is greater than 1/2 E(beam). No events were found. The results have been interpreted within a composite Z model and a supergravity model with a light gravitino. C1 UNIV FLORENCE, I-50125 FLORENCE, ITALY. CIEMAT, E-28040 MADRID, SPAIN. BOSTON UNIV, BOSTON, MA 02215 USA. CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND. INFN, I-80125 NAPLES, ITALY. UNIV NAPLES, I-80125 NAPLES, ITALY. NORTHEASTERN UNIV, BOSTON, MA 02115 USA. INFN, I-06100 PERUGIA, ITALY. UNIV PERUGIA, I-06100 PERUGIA, ITALY. WORLD LAB, FBLJA PROJECT, CH-1211 GENEVA 23, SWITZERLAND. SWISS FED INST TECHNOL, CH-8093 ZURICH, SWITZERLAND. MIT, CAMBRIDGE, MA 02139 USA. NUCL PHYS INST, ST PETERSBURG, RUSSIA. BULGARIAN ACAD SCI, INST MECHATRON, BU-1113 SOFIA, BULGARIA. INFN, I-40126 BOLOGNA, ITALY. MOSCOW THEORET & EXPTL PHYS INST, MOSCOW 117259, USSR. UNIV MICHIGAN, ANN ARBOR, MI 48109 USA. TATA INST FUNDAMENTAL RES, BOMBAY 400005, INDIA. RHEIN WESTFAL TH AACHEN, INST PHYS 1, W-5100 AACHEN, GERMANY. RHEIN WESTFAL TH AACHEN, INST PHYS 3, W-5100 AACHEN, GERMANY. INFN, I-00185 ROME, ITALY. UNIV ROME LA SAPIENZA, I-00185 ROME, ITALY. PRINCETON UNIV, PRINCETON, NJ 08544 USA. UNIV ALABAMA, UNIVERSITY, AL 35486 USA. JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA. INFN, I-20133 MILAN, ITALY. UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND. LAB ANNECY LE VIEUX PHYS PARTICULES, CNRS, IN2P3, F-74941 ANNECY LE VIEUX, FRANCE. HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY. NIKHEF, NATL INST ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS. NATL INST NUCL PHYS & HIGH ENERGY PHYS, 6525 ED NIJMEGEN, NETHERLANDS. CATHOLIC UNIV NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS. UNIV CALIF SAN DIEGO, SAN DIEGO, CA 92182 USA. CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. UNIV LYON 1, INST PHYS NUC LYON, CNRS, IN2P3, F-69622 VILLEURBANNE, FRANCE. PURDUE UNIV, W LAFAYETTE, IN 47907 USA. LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. HIGH ENERGY PHYS GRP, TAIPEI, TAIWAN. INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA. CHINESE UNIV SCI & TECHNOL, HEFEI 230029, PEOPLES R CHINA. KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERG PHYS, TAEJON 305701, SOUTH KOREA. UNIV SANTIAGO, DEPT FIS PARTICULAS ELEMENTALES, E-15706 SANTIAGO, SPAIN. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND. SHANGHAI INST CERAM, SHANGHAI, PEOPLES R CHINA. DESY, INST HOCHENERGIEPHYS, O-1615 ZEUTHEN, GERMANY. UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND. CALTECH, PASADENA, CA 91125 USA. HARVARD UNIV, CAMBRIDGE, MA 02139 USA. UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS. UNIV HAMBURG, W-2000 HAMBURG 13, GERMANY. RP ADRIANI, O (reprint author), INFN, I-50125 FLORENCE, ITALY. RI van der Zwaan, Bob/F-4070-2015; D'Alessandro, Raffaello/F-5897-2015; Chmeissani, Mokhtar/G-4346-2015; Duran, Ignacio/H-7254-2015; rodriguez calonge, francisco javier/H-9682-2015; Rancoita, Pier Giorgio/J-9896-2015; Hoorani, Hafeez/D-1791-2013; Arce, Pedro/L-1268-2014; Tsaregorodtsev, Andrei/E-3873-2016; Fiandrini, Emanuele/C-4549-2008; Berdugo, Javier/A-2858-2015; Leijtens, Xaveer/F-3302-2010; Lista, Luca/C-5719-2008; Ludovici, Lucio/F-5917-2011; Servoli, Leonello/E-6766-2012; bertucci, bruna/J-5237-2012; Cerrada, Marcos/J-6934-2014; Gonzalez Romero, Enrique/L-7561-2014; Vogel, Helmut/N-8882-2014; Ferguson, Thomas/O-3444-2014 OI van der Zwaan, Bob/0000-0001-5871-7643; D'Alessandro, Raffaello/0000-0001-7997-0306; Chmeissani, Mokhtar/0000-0002-2287-4791; Rancoita, Pier Giorgio/0000-0002-1990-4283; Arce, Pedro/0000-0003-3009-0484; Longo, Egidio/0000-0001-6238-6787; Tsaregorodtsev, Andrei/0000-0003-4618-520X; Diemoz, Marcella/0000-0002-3810-8530; Bertucci, Bruna/0000-0001-7584-293X; Filthaut, Frank/0000-0003-3338-2247; Berdugo, Javier/0000-0002-7911-8532; Leijtens, Xaveer/0000-0001-7794-8236; Ludovici, Lucio/0000-0003-1970-9960; Servoli, Leonello/0000-0003-1725-9185; Cerrada, Marcos/0000-0003-0112-1691; Gonzalez Romero, Enrique/0000-0003-2376-8920; Vogel, Helmut/0000-0002-6109-3023; Ferguson, Thomas/0000-0001-5822-3731 NR 25 TC 12 Z9 12 U1 3 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD DEC 31 PY 1992 VL 297 IS 3-4 BP 469 EP 476 DI 10.1016/0370-2693(92)91286-I PG 8 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KF698 UT WOS:A1992KF69800036 ER PT J AU KIGUCHI, K GIOMETTI, C CHUBB, CH FUJIKI, H HUBERMAN, E AF KIGUCHI, K GIOMETTI, C CHUBB, CH FUJIKI, H HUBERMAN, E TI DIFFERENTIATION INDUCTION IN HUMAN BREAST-TUMOR CELLS BY OKADAIC ACID AND RELATED INHIBITORS OF PROTEIN PHOSPHATASES-1 AND PHOSPHATASES-2A SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article ID KINASE-C; MONOCYTIC DIFFERENTIATION; CELLULAR-REGULATION; EXPRESSION; PHORBOL-12-MYRISTATE-13-ACETATE; RESISTANT; PHOSPHORYLATION; GENE C1 NATL CANC CTR,RES INST,TOKYO 104,JAPAN. RP KIGUCHI, K (reprint author), ARGONNE NATL LAB,DIV BIOL & MED RES,ARGONNE,IL 60439, USA. NR 23 TC 27 Z9 28 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0006-291X J9 BIOCHEM BIOPH RES CO JI Biochem. Biophys. Res. Commun. PD DEC 30 PY 1992 VL 189 IS 3 BP 1261 EP 1267 DI 10.1016/0006-291X(92)90209-4 PG 7 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA KF545 UT WOS:A1992KF54500002 PM 1336363 ER PT J AU HALL, CA PORSCHING, TA MESINA, GL AF HALL, CA PORSCHING, TA MESINA, GL TI ON A NETWORK METHOD FOR UNSTEADY INCOMPRESSIBLE FLUID-FLOW ON TRIANGULAR GRIDS SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS LA English DT Article DE INCOMPRESSIBLE FLOW; COVOLUME METHOD; UPWIND; VORONOI TESSELLATION; NETWORKS ID DUAL VARIABLE METHOD; DIFFERENCE-EQUATIONS AB The dual variable method for Delaunay triangulations is a network-theoretic method that transforms a set of primitive variable finite difference or finite element equations for incompressible flow into an equivalent system which is one-fifth the size of the original. Additionally, it eliminates the pressures from the system and produces velocities that are exactly discretely divergence-free. In this paper new discretizations of the convection term are presented for Delaunay triangulations, the dual variable method is extended to tessellations that contain obstacles, and an efficient algorithm for the solution of the dual variable system is described. C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. RP HALL, CA (reprint author), UNIV PITTSBURGH,DEPT MATH & STAT,PITTSBURGH,PA 15260, USA. NR 26 TC 12 Z9 12 U1 0 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0271-2091 J9 INT J NUMER METH FL JI Int. J. Numer. Methods Fluids PD DEC 30 PY 1992 VL 15 IS 12 BP 1383 EP 1406 DI 10.1002/fld.1650151203 PG 24 WC Computer Science, Interdisciplinary Applications; Mathematics, Interdisciplinary Applications; Mechanics; Physics, Fluids & Plasmas SC Computer Science; Mathematics; Mechanics; Physics GA KB753 UT WOS:A1992KB75300002 ER PT J AU BERG, JM CLARK, DL HUFFMAN, JC MORRIS, DE SATTELBERGER, AP STREIB, WE VANDERSLUYS, WG WATKIN, JG AF BERG, JM CLARK, DL HUFFMAN, JC MORRIS, DE SATTELBERGER, AP STREIB, WE VANDERSLUYS, WG WATKIN, JG TI EARLY ACTINIDE ALKOXIDE CHEMISTRY - SYNTHESIS, CHARACTERIZATION, AND MOLECULAR-STRUCTURES OF TH(IV) AND U(IV) ARYLOXIDE COMPLEXES SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID HYDROGEN-DEUTERIUM EXCHANGE; SPECTROSCOPIC PROPERTIES; CRYSTAL-STRUCTURE; MAGNETIC-PROPERTIES; METAL BONDS; URANIUM; DERIVATIVES; REACTIVITY; ACTIVATION; LIGANDS AB Several synthetic procedures have been developed for the preparation of early actinide aryloxide complexes. Simple alcoholysis of the actinide metallacycle {[(Me3Si)2N]2An(CH2SiMe2NSiMe3)} [An = Th (1), U (2)] using 1 equiv of 2,6-disubstituted phenol results in the protonation of the An-C bond to form mono(aryloxide) complexes An(O-2,6-R2C6H3)-N(SiMe3)2]3 [An = U; R = t-Bu (3), i-Pr (4). An = Th; R = t-Bu (5), Me (6)] in essentially quantitative yield. For An = Th, further stepwise substitution products, the bis(aryloxide) or tris(aryloxide) complexes Th(O-2,6-t-Bu2C6H3)2[N(SiMe3)2]2 (7) and Th(O-2,6-t-Bu2C6H3)3[N(SiMe3)2] (8), are readily isolated depending on the stoichiometry of added phenol. Prolonged (36 h) reflux with excess 2,6-di-tert-butylphenol fails to provide the homoleptic Th(O-2,6-1-Bu2C6H3)4 via this simple protonolysis reaction. Thorium metallacycle 1 reacts with 4 equiv of HO-4-t-BuC6H4 to produce polymeric [Th(O-4-t-BuC6H4)4]x, addition of pyridine to which yields the monomeric adduct Th(O-4-t-BuC6H4)4(py)3 (10). For alcoholysis reactions employing the uranium metallacycle (2), addition of slightly greater than 4 equiv of HO-2,6-t-Bu2C6H3 in refluxing toluene for 6 h provides U(O-2,6-R2C6H3)4 [R = t-Bu (11), i-Pr (12)]. While alcoholysis fails to provide the homoleptic Th(O-2,6-t-Bu2C6H3)4 (9), we can prepare this complex via a metathetical procedure. Reaction of ThI4(THF)4 with 4 equiv of KO-2,6-t-Bu2C6H3 in THF provides 9 in high yield. For less sterically-demanding aryloxide ligands, metathesis of ThI4(THF)4 with 4 equiv of KO-2,6-R2C6H3 in THF results in formation of bis(THF) adducts Th(O-2,6-R2C6H3)4(THF)2 [R = Me (13), i-Pr (14)]. The THF adducts readily exchange with pyridine to give Th(O-2,6-Me2C6H3)4(py)2 (15). These new aryloxide compounds have been characterized by elemental analysis, H-1 NMR, infrared spectroscopy, and, for U(O-2,6-t-Bu2C6H3)[N(SiMe3)2]3 (5), An(O-2,6-t-Bu2C6H3)4, [An = Th (9), U (11)], and Th(O-2,6-Me2C6H3)4(py)2 (15), single-crystal X-ray diffraction. In 5, the U metal center is coordinated to the O atom of the aryloxide ligand and the N atoms of the three silylamide ligands, in a pseudotetrahedral fashion with U-O and U-N distances of 2.145 (8) and 2.285 (11) angstrom, respectively. An(O-2,6-t-Bu2C6H3)4 complexes (An = Th, U) are isostructural and possess crystallographic S4 symmetry. Each set of four An-O bond lengths is identical [2.189 (6) angstrom, Th; and 2.135 (4) angstrom, U], and the O-An-O angles are of two types, four of 110.46 (15)-degrees for An = Th [110.2 (1)-degrees, An = U] and two of 107.5 (3)-degrees for An = Th [108.0 (2), An = U], and correspond to a slight flattening of the central AnO4 core. 15 has a pseudo-octahedral geometry about the central Th atom with the two pyridine ligands occupying cis positions. The average Th-N and Th-O distances are respectively 2.679 and 2.198 angstrom. Crystal data for 5 (-155-degrees-C): orthorhombic space group P2(1)2(1)2(1); a = 11.257 (3), b = 19.761 (6), c = 19.589 (7) angstrom; V = 4357.46 angstrom3; d(calc) = 1.409 g cm-3; Z = 4. 9 (-171-degrees-C): tetragonal space group I4BAR; a = b = 14.082 (5), c = 13.468 (5) angstrom; V = 2670.75 angstrom3; d(calc) = 1.317 g cm-3; Z = 2.11 (-145-degrees-C): tetragonal space group I4BAR; a = b = 14.066 (2), c = 13.404 (2) angstrom; V = 2652.10 angstrom3; d(calc) = 1.327 g cm-3; Z = 2. 15 (-171-degrees-C): monoclinic space group P2(1)/n; a = 14.724 (3), b = 19.724 (3), c = 15.456 (2) angstrom; beta = 100.95 (1)-degrees; V = 4407.01 angstrom3; d(calc), = 1.458 g cm-3; Z = 4. C1 LOS ALAMOS NATL LAB, DIV ISOTOPE & NUCL CHEM, MAIL STOP G739, LOS ALAMOS, NM 87545 USA. INDIANA UNIV, CTR MOLEC STRUCT, DEPT CHEM, BLOOMINGTON, IN 47401 USA. RI Clark, David/A-9729-2011; Morris, David/A-8577-2012 NR 59 TC 68 Z9 68 U1 0 U2 13 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 DEC 30 PY 1992 VL 114 IS 27 BP 10811 EP 10821 DI 10.1021/ja00053a017 PG 11 WC Chemistry, Multidisciplinary SC Chemistry GA KF882 UT WOS:A1992KF88200017 ER PT J AU ZHANG, JZ SCHWARTZ, BJ KING, JC HARRIS, CB AF ZHANG, JZ SCHWARTZ, BJ KING, JC HARRIS, CB TI ULTRAFAST STUDIES OF PHOTOCHROMIC SPIROPYRANS IN SOLUTION SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID TRANSIENT ABSORPTION; VIBRATIONAL-ENERGY; CONDENSED PHASE; TIME SCALES; DYNAMICS; PHOTODISSOCIATION; PHOTOCHEMISTRY; SPECTROSCOPY; SOLVATION; KINETICS AB The photochromic reaction dynamics of the spiropyran molecule 1',3',3'-trimethyl-6-hydroxyspiro[2H-1-benzopyran-2,2'-indoline] (HBPS) in solution have been studied with picosecond and femtosecond transient electronic absorption spectroscopy. Following excitation near 300 nm, the C-O bond of the molecule breaks in less than 100 fs to form a metastable species. A small fraction of this metastable species re-forms the broken C-O bond on the time scale of 200 fs. The major fraction of the metastable photoproduct vibrationally relaxes in a few picoseconds, and then undergoes isomerization to form a merocyanine product with a decay time constant of about 100 ps, depending on solvent viscosity. This isomerization decay is faster at shorter probe wavelengths and slower at longer wavelengths, indicating that this isomerization gives rise to a red-shifted absorption spectrum. The final merocyanine isomers are stable on the nanosecond time scale. All the results indicate that the initial steps of the photochromic reaction process of HBPS are extremely fast. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. NR 56 TC 78 Z9 80 U1 2 U2 31 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD DEC 30 PY 1992 VL 114 IS 27 BP 10921 EP 10927 DI 10.1021/ja00053a032 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA KF882 UT WOS:A1992KF88200032 ER PT J AU NUTT, GL KING, WE AF NUTT, GL KING, WE TI COMMENTS ON THE BOND STRENGTH MEASUREMENTS OF GUPTA AND COWORKERS SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article ID INTERFACE AB The use of shock-induced spallation is emerging as a promising technique to determine bond strength at bi-material interfaces. With shock waves it is theoretically possible to apply the stress to an interface so rapidly that collective atomic bond separation occurs rather than nucleation and propagation of cracks. Gupta and co-workers have deduced from threshold spall experiments and finite element calculations, the bond strength of the interface between SiC and Si, and between SiC and various forms of carbon. A number of critical assumptions are used by the authors to arrive at their results, several of which can be examined by finite element calculations. We perform the necessary calculations and find the assumptions are incorrect, causing them to report bond strengths much higher than can be justified. Possible solutions to this problem are discussed. RP NUTT, GL (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 21 TC 9 Z9 10 U1 0 U2 4 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD DEC 30 PY 1992 VL 159 IS 2 BP 135 EP 142 DI 10.1016/0921-5093(92)90281-5 PG 8 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA KE431 UT WOS:A1992KE43100001 ER PT J AU BODENSCHATZ, E CANNELL, DS DEBRUYN, JR ECKE, R HU, YC LERMAN, K AHLERS, G AF BODENSCHATZ, E CANNELL, DS DEBRUYN, JR ECKE, R HU, YC LERMAN, K AHLERS, G TI EXPERIMENTS ON 3 SYSTEMS WITH NONVARIATIONAL ASPECTS SO PHYSICA D-NONLINEAR PHENOMENA LA English DT Article ID BINARY-FLUID CONVECTION; WAVE-NUMBER SELECTION; TRAVELING WAVES; BENARD CONVECTION; PATTERN-FORMATION; TIME EVOLUTION; NON-BOUSSINESQ; VECTOR FIELD; INSTABILITY; LAYER AB We present recent experimental results for three pattern-forming systems in which non-variational effects play an important role. The first is thermal convection in a shallow horizontal layer of fluid with temperature-dependent properties. In this system, a hexagonal lattice of convection cells forms at onset. This lattice becomes unstable to rolls when the temperature difference is increased sufficiently. In the ''roll'' state, the rolls are curved and the system forms stable rotating spirals. The rotating spiral states are associated with non-variational effects. Secondly, we discuss the formation of localized pulses in binary-mixture convection near onset. These pulses would not exist in a potential system. In narrow channels, they have been observed as stable states. In systems which are spatially extended in two dimensions they can form spontaneously, and can be long-lived. The third topic which we discuss is the Kuppers-Lortz instability in a thin horizontal layer of a Boussinesq fluid heated from below and rotated about a vertical axis. In this case, the pattern which forms immediately above the onset of convection is non-periodically time dependent even though the amplitude grows continuously from zero as the temperature difference is increased. The dominant mechanism of the instability is found to involve the motion of boundaries between coherent regions of convection rolls of a given orientation. The time dependence could not occur in a variational system. Since it occurs for arbitrarily small amplitudes, one might hope that it is amenable to theoretical analysis. C1 UNIV CALIF SANTA BARBARA, CTR NONLINEAR SCI, SANTA BARBARA, CA 93106 USA. MEM UNIV NEWFOUNDLAND, DEPT PHYS, St John A1B 3X7, NEWFOUNDLAND, CANADA. LOS ALAMOS NATL LAB, DEPT PHYS, LOS ALAMOS, NM 87545 USA. LOS ALAMOS NATL LAB, CTR NONLINEAR STUDIES, LOS ALAMOS, NM 87545 USA. RP BODENSCHATZ, E (reprint author), UNIV CALIF SANTA BARBARA, DEPT PHYS, SANTA BARBARA, CA 93106 USA. RI Lerman, Kristina/F-4198-2010; Bodenschatz, Eberhard/C-6603-2009; OI Lerman, Kristina/0000-0002-5071-0575; Bodenschatz, Eberhard/0000-0002-2901-0144; Ecke, Robert/0000-0001-7772-5876 NR 69 TC 48 Z9 48 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2789 EI 1872-8022 J9 PHYSICA D JI Physica D PD DEC 30 PY 1992 VL 61 IS 1-4 BP 77 EP 93 DI 10.1016/0167-2789(92)90150-L PG 17 WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA KQ109 UT WOS:A1992KQ10900009 ER PT J AU BRANDES, HK STRINGER, CD HARTMAN, FC AF BRANDES, HK STRINGER, CD HARTMAN, FC TI CONFORMATIONAL FLEXIBILITY OF THE REGULATORY SITE OF PHOSPHORIBULOKINASE AS DEMONSTRATED WITH BIFUNCTIONAL REAGENTS SO BIOCHEMISTRY LA English DT Article ID FERREDOXIN-THIOREDOXIN SYSTEM; LEAF RIBULOSE-5-PHOSPHATE KINASE; NADP-MALATE DEHYDROGENASE; ACTIVE-SITE; SPINACH PHOSPHORIBULOKINASE; TRIOSEPHOSPHATE ISOMERASE; LACTATE-DEHYDROGENASE; DIRECTED MUTAGENESIS; CYSTEINYL RESIDUE; SEQUENCE AB Phosphoribulokinase (PRK) is one of several chloroplastic enzymes whose activity is regulated by thiol-disulfide exchange via thioredoxin. Activation entails reduction of an active-site disulfide bond between Cys16 and Cys 55. Bifunctional cross-linking reagents have been used to approximate the interresidue distance between Cys16 and Cys55, an issue which impinges on the relative conformational states of the activated and deactivated forms of the enzyme. Spinach PRK is rapidly inactivated by stoichiometric levels of 4,4'-difluoro-3,3'-dinitrodiphenyl sulfone (FNPS) or 1,5-difluoro-2,4-dinitrobenzene (DFNB), which span 9 and 3.5 angstrom, respectively. ATP, but not ribulose 5-phosphate, retards the rate of inactivation, suggesting that modification has occurred at the nucleotide binding domain of the active site. Sulfhydryl modification is indicated by partial reversibility of inactivation as effected by exogenous thiols. Tryptic mapping by reverse-phase chromatography of [C-14]carboxymethylated enzyme, subsequent to its reaction with either FNPS or DFNB, demonstrates modification of Cys16 and Cys55 by both reagents, and formation of only one major chromophoric peptide in each case. On the basis of the sequence analysis of the purified chromophoric peptides, Cys16 and Cys55 are cross-linked by both FNPS and DFNB. Thus, the intrasubunit distance between the beta-sulfhydryls of Cys16 and Cys55 is dynamic rather than static. Diminished conformational flexibility upon oxidation of the regulatory sulfhydryls to a disulfide may be partially responsible for the concomitant loss of enzymatic activity. C1 OAK RIDGE NATL LAB,DIV BIOL,PROT ENGN & MOLEC MUTAGENESIS PROGRAM,OAK RIDGE,TN 37831. UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,OAK RIDGE,TN 37831. NR 40 TC 9 Z9 9 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD DEC 29 PY 1992 VL 31 IS 51 BP 12833 EP 12838 DI 10.1021/bi00166a018 PG 6 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KE606 UT WOS:A1992KE60600018 PM 1334433 ER PT J AU GUO, J CHANG, HLM LAM, DJ AF GUO, J CHANG, HLM LAM, DJ TI SUBSTRATE SURFACE STEP EFFECTS ON MICROSTRUCTURE OF EPITAXIAL-FILMS SO APPLIED PHYSICS LETTERS LA English DT Article AB Sapphire (0001) basal plane is a commonly used substrate for film depositions. Due to the threefold rotational symmetry of the (0001) substrate surface, epitaxial films deposited are expected to form at most three variants with relative orientations of 120-degrees and 240-degrees. However, epitaxial TiO2 (tetragonal) and VO2 (monoclinic) films deposited on sapphire (0001) substrates by the metalorganic chemical vapor deposition technique were found to have six variants of relative orientations of 60-degrees, 120-degrees, 180-degrees, 240-degrees, and 300-degrees based on the x-ray diffraction studies. Furthermore, epitaxial MgO (cubic) films deposited on sapphire (0001 ) substrates by the molecular beam epitaxy technique were found to have two variants which are mirror images about the (1210BAR) plane from the high resolution electron microscopy. We show that these unconventional film microstructures found experimentally are caused by the substrate surface steps. RP GUO, J (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 7 TC 27 Z9 27 U1 0 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD DEC 28 PY 1992 VL 61 IS 26 BP 3116 EP 3117 DI 10.1063/1.107978 PG 2 WC Physics, Applied SC Physics GA KD924 UT WOS:A1992KD92400014 ER PT J AU PARIKH, NR HUNN, JD MCGUCKEN, E SWANSON, ML WHITE, CW RUDDER, RA MALTA, DP POSTHILL, JB MARKUNAS, RJ AF PARIKH, NR HUNN, JD MCGUCKEN, E SWANSON, ML WHITE, CW RUDDER, RA MALTA, DP POSTHILL, JB MARKUNAS, RJ TI SINGLE-CRYSTAL DIAMOND PLATE LIFTOFF ACHIEVED BY ION-IMPLANTATION AND SUBSEQUENT ANNEALING SO APPLIED PHYSICS LETTERS LA English DT Article AB We describe a new method for removing thin, large area sheets of diamond from bulk or homoepitaxial diamond crystals. This method consists of an ion implantation step, followed by a selective etching procedure. High energy (4-5 MeV) implantation of carbon or oxygen ions creates a well-defined layer of damaged diamond that is buried at a controlled depth below the surface. For C implantations, this layer is graphitized by annealing in vacuum, and then etched in either an acid solution, or by heating at 550-600-degrees-C in oxygen. This process successfully lifts off the diamond plate above the graphite layer. For O implantations of a suitable dose (3 X 10(17) cm-2 or greater), the liftoff is achieved by annealing in vacuum or flowing oxygen. In this case, the O required for etching of the graphitic layer is also supplied internally by the implantation. This liftoff method, combined with well-established homoepitaxial growth processes, has considerable potential for the fabrication of large area single crystalline diamond sheets. C1 RES TRIANGLE INST,RES TRIANGLE PK,NC 27709. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP PARIKH, NR (reprint author), UNIV N CAROLINA,CHAPEL HILL,NC 27599, USA. NR 5 TC 84 Z9 84 U1 1 U2 23 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD DEC 28 PY 1992 VL 61 IS 26 BP 3124 EP 3126 DI 10.1063/1.107981 PG 3 WC Physics, Applied SC Physics GA KD924 UT WOS:A1992KD92400017 ER PT J AU HONG, HW MCMAHON, WE ZSCHACK, P LIN, DS ABURANO, RD CHEN, H CHIANG, TC AF HONG, HW MCMAHON, WE ZSCHACK, P LIN, DS ABURANO, RD CHEN, H CHIANG, TC TI C-60 ENCAPSULATION OF THE SI(111)-(7X7) SURFACE SO APPLIED PHYSICS LETTERS LA English DT Article ID RECONSTRUCTED SURFACE; SOLID C60; DIFFRACTION AB The structure of a Si(111)-(7 X 7) surface capped by a 200 angstrom film of C60 was studied by grazing-incidence x-ray diffraction. The Si(111)-(7 X 7) reconstruction prepared in vacuum, including the loosely bonded ''adatoms'' on the surface, is preserved under the C60 overlayer. This result illustrates that C60 can be used as an inert cap for surfaces and suggests potentially interesting applications in surface science research and electronic device engineering. C1 UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801. UNIV ILLINOIS,DEPT MAT SCI & ENGN,URBANA,IL 61801. UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RI Lin, Dengsung/A-4127-2009; Chiang, Tai/H-5528-2011 NR 12 TC 34 Z9 34 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD DEC 28 PY 1992 VL 61 IS 26 BP 3127 EP 3129 DI 10.1063/1.107982 PG 3 WC Physics, Applied SC Physics GA KD924 UT WOS:A1992KD92400018 ER PT J AU HOLLAND, OW HAYNES, TE AF HOLLAND, OW HAYNES, TE TI DAMAGE SATURATION DURING HIGH-ENERGY ION-IMPLANTATION OF SI1-XGEX SO APPLIED PHYSICS LETTERS LA English DT Article ID CARRIER LIFETIME; SILICON; SI AB Saturation of radiation damage during MeV Si+-ion implantation of unstrained Si1-xGex (x=0.15,0.50) alloy layers, as well as bulk Ge, was investigated. First observed in self-ion irradiated Si, damage saturation is distinguished by a low concentration of lattice defects in the near-surface region ahead of the ions' end-of-range which remains constant over an extended range of implantation dose. A previously proposed model accounted for saturation by assuming that damage nucleates homogeneously during ion irradiation. Different mechanisms for nucleation of damage are discussed and substrate conditions are specified under which each dominates. A characteristic temperature is defined for each substrate above which damage nucleates primarily by a homogeneous mechanism. Results are presented which show the damage saturation occurs above this characteristic temperature but not below, thus establishing homogeneous nucleation as a necessary condition for the occurrence of damage saturation, as previously suggested. RP HOLLAND, OW (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831, USA. RI Haynes, Tony/P-8932-2015 OI Haynes, Tony/0000-0003-2871-4745 NR 11 TC 8 Z9 8 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD DEC 28 PY 1992 VL 61 IS 26 BP 3148 EP 3150 DI 10.1063/1.107989 PG 3 WC Physics, Applied SC Physics GA KD924 UT WOS:A1992KD92400025 ER PT J AU SPILLER, E WILCZYNSKI, J STEARN, D GOLUB, L NYSTROM, G AF SPILLER, E WILCZYNSKI, J STEARN, D GOLUB, L NYSTROM, G TI IMAGING PERFORMANCE OF MULTILAYER X-RAY MIRRORS (APPLIED PHYSICS LETTERS, VOL 61, PG 1481, 1992) SO APPLIED PHYSICS LETTERS LA English DT Correction, Addition C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. CTR ASTROPHYS,CAMBRIDGE,MA 02138. RP SPILLER, E (reprint author), IBM CORP,DIV RES,TJ WATSON RES CTR,POB 218,YORKTOWN HTS,NY 10598, USA. NR 1 TC 3 Z9 3 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD DEC 28 PY 1992 VL 61 IS 26 BP 3195 EP 3195 DI 10.1063/1.108505 PG 1 WC Physics, Applied SC Physics GA KD924 UT WOS:A1992KD92400044 ER PT J AU ANTONIADIS, I MAZUR, PO MOTTOLA, E AF ANTONIADIS, I MAZUR, PO MOTTOLA, E TI CONFORMAL SYMMETRY AND CENTRAL CHARGES IN 4 DIMENSIONS SO NUCLEAR PHYSICS B LA English DT Article ID FREE QUANTUM-THEORY; COSMOLOGICAL CONSTANT; GRAVITY; ANOMALIES; STRINGS AB The trace anomaly of matter in curved space generates an effective action for the conformal factor of the metric tensor in D = 4 dimensions, analogous to the Polyakov action for D = 2. We compute the contributions of the reparameterization ghosts to the central charges for D = 4, as well as the quantum contribution of the conformal factor itself. The ghost contribution satisfies the necessary Wess-Zumino consistency condition only if combined with the spin-2 modes, whose contributions to the trace anomaly we also discuss. C1 UNIV S CAROLINA,DEPT PHYS & ASTRON,COLUMBIA,SC 29208. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP ANTONIADIS, I (reprint author), ECOLE POLYTECH,CTR PHYS THEOR,F-91128 PALAISEAU,FRANCE. NR 28 TC 91 Z9 91 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD DEC 28 PY 1992 VL 388 IS 3 BP 627 EP 647 DI 10.1016/0550-3213(92)90557-R PG 21 WC Physics, Particles & Fields SC Physics GA KK707 UT WOS:A1992KK70700003 ER PT J AU ABE, F AMIDEI, D ANWAYWIESE, C APOLLINARI, G ATAC, M AUCHINCLOSS, P AZZI, P BADEN, AR BACCHETTA, N BADGETT, W BAILEY, MW BAMBERGER, A DEBARBARO, P BARBAROGALTIERI, A BARNES, VE BARNETT, BA BAUER, G BAUMANN, T BEDESCHI, F BEHRENDS, S BELFORTE, S BELLETTINI, G BELLINGER, J BENJAMIN, D BENLLOCH, J BENSINGER, J BERETVAS, A BERGE, JP BERTOLUCCI, S BIERY, K BHADRA, S BINKLEY, M BISELLO, D BLAIR, R BLOCKER, C BODEK, A BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CERVELLI, F CHADWICK, K CHAPMAN, J CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG COBAL, M CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CUNNINGHAM, JD DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ETCHEGOYEN, A FARHAT, B FELDMAN, G FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FREI, D FRISCH, H FUESS, T FUKUI, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GOULIANOS, K GRASSMANN, H GRIECO, GM GRINDLEY, R GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRAL, B HARRIS, RM HAUGER, SA HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HONG, S HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, SB KIM, SH KIM, YK KIRSCH, L KONDO, K KONIGSBERG, J KORDAS, K KOVACS, E KRASBERG, M KUHLMANN, SE KUNS, E LAASANEN, AT LAMMEL, S LAMOUREUX, JI LEONE, S LEWIS, JD LI, W LIMON, P LINDGREN, M LISS, TM LOCKYER, M LORETI, M LOW, EH LUCCHESI, D LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTINGLY, R MCINTYRE, P MENZIONE, A MESCHI, E MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A MULLER, T NAKAE, LF NAKANO, I NELSON, C NEUBERGER, D NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PAPADIMITRIOU, V PARA, A PARE, E PARK, S PATRICK, J PAULETTA, G PESCARA, L PHILLIPS, TJ PTOHOS, F PLUNKETT, R PONDROM, L PROUDFOOT, J PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROBERTSON, WJ RODRIGO, T ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCRIBANO, A SEGLER, S SEIYA, Y SGANOS, G SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SINERVO, P SKARHA, J SLIWA, K SPIES, A SMITH, DA SNIDER, FD SONG, L SONG, T SPAHN, M SPHICAS, P STDENIS, R STANCO, L STEFANINI, A SULLIVAN, G SUMOROK, K SWARTZ, RL TAKANO, M TAKIKAWA, K TAREM, S TARTARELLI, F TETHER, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TSAY, Y TSENG, J TURINI, N UKEGAWA, F UNDERWOOD, D VEJCIK, S WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WALSH, J WATTS, G WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WICKLUND, E WILLIAMS, HH WINER, BL WOLINSKI, J WU, D WYSS, J YAGIL, A YASUOKA, K YE, Y YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZHANG, S ZUCCHELLI, S AF ABE, F AMIDEI, D ANWAYWIESE, C APOLLINARI, G ATAC, M AUCHINCLOSS, P AZZI, P BADEN, AR BACCHETTA, N BADGETT, W BAILEY, MW BAMBERGER, A DEBARBARO, P BARBAROGALTIERI, A BARNES, VE BARNETT, BA BAUER, G BAUMANN, T BEDESCHI, F BEHRENDS, S BELFORTE, S BELLETTINI, G BELLINGER, J BENJAMIN, D BENLLOCH, J BENSINGER, J BERETVAS, A BERGE, JP BERTOLUCCI, S BIERY, K BHADRA, S BINKLEY, M BISELLO, D BLAIR, R BLOCKER, C BODEK, A BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CERVELLI, F CHADWICK, K CHAPMAN, J CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG COBAL, M CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CUNNINGHAM, JD DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ETCHEGOYEN, A FARHAT, B FELDMAN, G FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FREI, D FRISCH, H FUESS, T FUKUI, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GOULIANOS, K GRASSMANN, H GRIECO, GM GRINDLEY, R GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRAL, B HARRIS, RM HAUGER, SA HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HONG, S HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, SB KIM, SH KIM, YK KIRSCH, L KONDO, K KONIGSBERG, J KORDAS, K KOVACS, E KRASBERG, M KUHLMANN, SE KUNS, E LAASANEN, AT LAMMEL, S LAMOUREUX, JI LEONE, S LEWIS, JD LI, W LIMON, P LINDGREN, M LISS, TM LOCKYER, M LORETI, M LOW, EH LUCCHESI, D LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTINGLY, R MCINTYRE, P MENZIONE, A MESCHI, E MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A MULLER, T NAKAE, LF NAKANO, I NELSON, C NEUBERGER, D NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PAPADIMITRIOU, V PARA, A PARE, E PARK, S PATRICK, J PAULETTA, G PESCARA, L PHILLIPS, TJ PTOHOS, F PLUNKETT, R PONDROM, L PROUDFOOT, J PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROBERTSON, WJ RODRIGO, T ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCRIBANO, A SEGLER, S SEIYA, Y SGANOS, G SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SINERVO, P SKARHA, J SLIWA, K SPIES, A SMITH, DA SNIDER, FD SONG, L SONG, T SPAHN, M SPHICAS, P STDENIS, R STANCO, L STEFANINI, A SULLIVAN, G SUMOROK, K SWARTZ, RL TAKANO, M TAKIKAWA, K TAREM, S TARTARELLI, F TETHER, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TSAY, Y TSENG, J TURINI, N UKEGAWA, F UNDERWOOD, D VEJCIK, S WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WALSH, J WATTS, G WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WICKLUND, E WILLIAMS, HH WINER, BL WOLINSKI, J WU, D WYSS, J YAGIL, A YASUOKA, K YE, Y YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZHANG, S ZUCCHELLI, S TI INCLUSIVE J/OMEGA, OMEGA(2S), AND B-QUARK PRODUCTION IN (P)OVER-BAR-P COLLISIONS AT ROOT-S = 1.8 TEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID CROSS-SECTION; HADRONIC COLLISIONS; E+E ANNIHILATION; COLLIDER AB Inclusive J/psi and psi(2S) production has been studied in ppBAR collisions at square-root s = 1.8 TeV using 2.6+/-0.2 pb-1 of data taken with the Collider Detector at Fermilab. The products of production cross section times branching fraction were measured as functions of P(T) for J/psi --> mu+mu- and psi(2S) --> mu+mu-. In the kinematic range P(T)>6 GeV/c and Absolute value of eta less-than-or-equal-to 0.5 we get sigma(ppBAR --> J/psiX)B(J/psi --> mu+mu-) = 6.88+/-0.23(stat)-1.08(+0.93)(syst) nb, and sigma(ppBAR --> psi(2S)X)B(psi(2S) --> mu+mu-) = 0.232+/-0.251(stat)-0.032(+0.029)(syst) nb. From these values we calculate the inclusive b-quark production cross section. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. BRANDEIS UNIV,WALTHAM,MA 02254. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. UNIV CHICAGO,CHICAGO,IL 60637. DUKE UNIV,DURHAM,NC 27706. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. IST NAZL FIS NUCL,LAB NAZL FRASCATI,FRASCATI,ITALY. HARVARD UNIV,CAMBRIDGE,MA 02138. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV CALIF BERKELEY,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV MICHIGAN,ANN ARBOR,MI 48109. UNIV PADUA,IST NAZL FIS NUCL,I-35131 PADUA,ITALY. UNIV PENN,PHILADELPHIA,PA 19104. UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. TEXAS A&M UNIV SYST,COLL STN,TX 77843. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. UNIV ILLINOIS,URBANA,IL 61801. RP ABE, F (reprint author), NATL LAB HIGH ENERGY PHYS,IBARAKI,JAPAN. RI St.Denis, Richard/C-8997-2012; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Kim, Soo-Bong/B-7061-2014 OI Chiarelli, Giorgio/0000-0001-9851-4816; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; NR 25 TC 264 Z9 264 U1 1 U2 7 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 DEC 28 PY 1992 VL 69 IS 26 BP 3704 EP 3708 DI 10.1103/PhysRevLett.69.3704 PG 5 WC Physics, Multidisciplinary SC Physics GA KD715 UT WOS:A1992KD71500004 ER PT J AU SPRINGER, PT FIELDS, DJ WILSON, BG NASH, JK GOLDSTEIN, WH IGLESIAS, CA ROGERS, FJ SWENSON, JK CHEN, MH BARSHALOM, A STEWART, RE AF SPRINGER, PT FIELDS, DJ WILSON, BG NASH, JK GOLDSTEIN, WH IGLESIAS, CA ROGERS, FJ SWENSON, JK CHEN, MH BARSHALOM, A STEWART, RE TI SPECTROSCOPIC ABSORPTION-MEASUREMENTS OF AN IRON PLASMA SO PHYSICAL REVIEW LETTERS LA English DT Article ID HOT AB The first quantitative measurement of photoabsorption in the region determining the Rosseland and Planck mean opacities is obtained for a well-characterized, radiatively heated iron plasma using new techniques and instrumentation. The plasma density and temperature are simultaneously constrained with high accuracy, allowing unambiguous comparisons with opacity models used in modeling radiative transfer in equilibrium astrophysical and laboratory plasmas. The experimental Rosseland and Planck group means are constrained to an accuracy of 15%. C1 NATL RES CTR NEGEV,IL-84190 BEER SHEVA,ISRAEL. RP SPRINGER, PT (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 18 TC 122 Z9 125 U1 1 U2 8 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 DEC 28 PY 1992 VL 69 IS 26 BP 3735 EP 3738 DI 10.1103/PhysRevLett.69.3735 PG 4 WC Physics, Multidisciplinary SC Physics GA KD715 UT WOS:A1992KD71500012 ER PT J AU LAKS, DB WEI, SH ZUNGER, A AF LAKS, DB WEI, SH ZUNGER, A TI EVOLUTION OF ALLOY PROPERTIES WITH LONG-RANGE ORDER SO PHYSICAL REVIEW LETTERS LA English DT Article ID SPECIAL-QUASIRANDOM-STRUCTURES; ENERGIES AB We present a general theory of compounds with partial long-range order. We derive a simple formula that determines the properties of a partially ordered compound from those of the perfectly random alloy and the fully ordered compound. The formula makes accurate predictions of both formation energies and electronic band structures. We also use the formula to predict the band gaps of Al1-xGaxAs/GaAs superlattices. C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. RI Zunger, Alex/A-6733-2013 NR 17 TC 76 Z9 76 U1 3 U2 15 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 DEC 28 PY 1992 VL 69 IS 26 BP 3766 EP 3769 DI 10.1103/PhysRevLett.69.3766 PG 4 WC Physics, Multidisciplinary SC Physics GA KD715 UT WOS:A1992KD71500020 ER PT J AU GAMMEL, PL DURAN, CA BISHOP, DJ KOGAN, VG LEDVIJ, M SIMONOV, AY RICE, JP GINSBERG, DM AF GAMMEL, PL DURAN, CA BISHOP, DJ KOGAN, VG LEDVIJ, M SIMONOV, AY RICE, JP GINSBERG, DM TI OBSERVATION OF A NOVEL VORTEX STRUCTURE DRIVEN BY MAGNETIC-INTERACTIONS NEAR A SAWTOOTH TWIN BOUNDARY IN YBA2CU3O7-DELTA SO PHYSICAL REVIEW LETTERS LA English DT Article ID CRYSTALS; SUPERCONDUCTORS; FILMS AB We have used magnetic decoration to study the pattern of vortices formed near an isolated sawtooth twin boundary in single-crystal YBa2Cu3- O7-delta. When the pitch of the sawtooth is comparable to both the intervortex spacing and the penetration depth, we find an unusual vortex structure which has a reduced symmetry relative to the sawtooth itself. This vortex pattern arises from the magnetic interaction between the vortices and the twin boundary which occurs for an asymmetric twin. This is the first observation of a vortex structure caused by the magnetic interaction with a crystalline defect. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. RP GAMMEL, PL (reprint author), AT&T BELL LABS,MURRAY HILL,NJ 07974, USA. RI Simonov, Andrei/C-1697-2015 OI Simonov, Andrei/0000-0001-6452-0214 NR 17 TC 20 Z9 20 U1 0 U2 1 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 DEC 28 PY 1992 VL 69 IS 26 BP 3808 EP 3811 DI 10.1103/PhysRevLett.69.3808 PG 4 WC Physics, Multidisciplinary SC Physics GA KD715 UT WOS:A1992KD71500031 ER PT J AU BUDHANI, RC SUENAGA, M LIOU, SH AF BUDHANI, RC SUENAGA, M LIOU, SH TI GIANT SUPPRESSION OF FLUX-FLOW RESISTIVITY IN HEAVY-ION IRRADIATED TL2BA2CA2CU3O10 FILMS - INFLUENCE OF LINEAR DEFECTS ON VORTEX TRANSPORT SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; HIGH-TC SUPERCONDUCTORS; BULK SUPERCONDUCTIVITY; YBA2CU3O7; CRYSTALS; FIELDS; OXIDES AB A large shift of the onset of flux-flow resistivity and the irreversibility line H(irr)(T) to higher temperatures is observed in Tl2Ba2Ca2Cu3O10 filMS containing linear defects created by Ag+21 ion irradiation. The H(irr)(T), which has a characteristic L shape in highly anisotropic Tl and Bi based cuprates, becomes more like that of YBa2Cu3O7 in the presence of these defects. The J(c) at 77 K also shows a large increase as a result of flux localization at the defects. The transport data indicate that in the H-T plane above H(irr)(T) of the unirradiated material, an ensemble of unoccupied defects is required for effective pinning of each flux line in the system. C1 UNIV NEBRASKA,DEPT PHYS,LINCOLN,NE 68588. RP BUDHANI, RC (reprint author), BROOKHAVEN NATL LAB,DIV MAT SCI,UPTON,NY 11973, USA. NR 26 TC 134 Z9 134 U1 1 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 DEC 28 PY 1992 VL 69 IS 26 BP 3816 EP 3819 DI 10.1103/PhysRevLett.69.3816 PG 4 WC Physics, Multidisciplinary SC Physics GA KD715 UT WOS:A1992KD71500033 ER PT J AU DURHAM, WB KIRBY, SH STERN, LA AF DURHAM, WB KIRBY, SH STERN, LA TI EFFECTS OF DISPERSED PARTICULATES ON THE RHEOLOGY OF WATER ICE AT PLANETARY CONDITIONS SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID GANYMEDE; TEMPERATURE; DEFORMATION; RELAXATION; EVOLUTION; CALLISTO; FELDSPAR; CREEP; FLOW AB We have investigated the effects of initial grain size and hard particulate impurities on the transient and steady state flow of water ice I at laboratory conditions selected to provide more quantitative constraints on the thermomechanical evolution of the giant icy moons of the outer solar system. Our samples were molded with particulate volume fractions, phi, of 0.001 to 0.56 and particle sizes of 1 to 150 mum. Deformation experiments were conducted at constant shortening rates of 4.4 x 10(-7) to 4.9 X 10-(4) s-1 at pressures of 50 and 100 MPa and temperatures 77 to 223 K. For the pure ice samples, initial grain sizes were 0.2-0.6 mm, 0.75-1.75 mm, and 1.25-2.5 mm. Stress-strain curves of pure ice I under these conditions display a strength maximum sigma(u) at plastic strains epsilon less-than-or-equal-to 0.01 after initial yield, followed by strain softening and achievement of steady state levels of stress, sigma(ss) at epsilon = 0.1 to 0.2. Finer starting grain size in pure ice generally raises the level of sigma(u). Petrography indicates that the initial transient flow behavior is associated with the nucleation and growth of recrystallized ice grains and the approach to sigma(ss) evidently corresponds to the development of a steady state grain texture. Effects of particulate concentrations phi < 0.1 are slight. At these concentrations, a small but significant reduction in sigma(u) with respect to that for pure water ice occurs. Mixed-phase ice with phi greater-than-or-equal-to 0.1 is significantly stronger than pure ice; the strength of samples with phi = 0.56 approaches that of dry confined sand. The magnitude of the strengthening effect is far greater than expected from homogeneous strain-rate enhancement in the ice fraction or from pinning of dislocations (Orowan hardening). This result suggests viscous drag occurs in the ice as it flows around the hard particulates. Mixed-phase ice is also tougher than pure ice, extending the range of bulk plastic deformation versus faulting to lower temperatures and higher strain rates. The high-pressure phase ice II formed in phi = 0.56 mixed-phase ice during deformation at high stresses. Bulk planetary compositions of ice + rock (phi = 0.4-0.5) are roughly 2 orders of magnitude more viscous than pure ice, promoting the likelihood of thermal instability inside giant icy moons and possibly explaining the retention of crater topography on icy planetary surfaces. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. US GEOL SURVEY,MENLO PK,CA 94025. NR 34 TC 103 Z9 105 U1 0 U2 7 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-PLANET JI J. Geophys. Res.-Planets PD DEC 25 PY 1992 VL 97 IS E12 BP 20883 EP 20897 PG 15 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KU057 UT WOS:A1992KU05700003 ER PT J AU FICKETT, JW TUNG, CS AF FICKETT, JW TUNG, CS TI ASSESSMENT OF PROTEIN CODING MEASURES SO NUCLEIC ACIDS RESEARCH LA English DT Article ID DNA-SEQUENCES; NUCLEOTIDE-SEQUENCES; CODON PREFERENCE; GENOME SEQUENCE; REGIONS; RECOGNITION; OLIGONUCLEOTIDES; IDENTIFICATION; PERIODICITY; FREQUENCY AB A number of methods for recognizing protein coding genes in DNA sequence have been published over the last 13 years, and new, more comprehensive algorithms, drawing on the repertoire of existing techniques, continue to be developed. To optimize continued development, it is valuable to systematically review and evaluate published techniques. At the core of most gene recognition algorithms is one or more coding measures - functions which produce, given any sample window of sequence, a number or vector intended to measure the degree to which a sample sequence resembles a window of 'typical' exonic DNA. In this paper we review and synthesize the underlying coding measures from published algorithms. A standardized benchmark is described, and each of the measures is evaluated according to this benchmark. Our main conclusion is that a very simple and obvious measure - counting oligomers - is more effective than any of the more sophisticated measures. Different measures contain different information. However there is a great deal of redundancy in the current suite of measures. We show that in future development of gene recognition algorithms, attention can probably be limited to six of the twenty or so measures proposed to date. C1 LOS ALAMOS NATL LAB, CTR HUMAN GENOME STUDIES, LOS ALAMOS, NM 87545 USA. RP LOS ALAMOS NATL LAB, THEORET BIOL & BIOPHYS GRP, LOS ALAMOS, NM 87545 USA. FU NIGMS NIH HHS [GM-37812] NR 57 TC 226 Z9 239 U1 0 U2 2 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0305-1048 EI 1362-4962 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD DEC 25 PY 1992 VL 20 IS 24 BP 6441 EP 6450 DI 10.1093/nar/20.24.6441 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KG705 UT WOS:A1992KG70500001 PM 1480466 ER PT J AU PENNINGS, S MEERSSEMAN, G BRADBURY, EM AF PENNINGS, S MEERSSEMAN, G BRADBURY, EM TI EFFECT OF GLYCEROL ON THE SEPARATION OF NUCLEOSOMES AND BENT DNA IN LOW IONIC-STRENGTH POLYACRYLAMIDE-GEL ELECTROPHORESIS SO NUCLEIC ACIDS RESEARCH LA English DT Article ID CORE HISTONES; PROTEIN; STABILIZATION; MOBILITY; 5-S-RDNA; INVITRO AB We report that glycerol changes the separation characteristics of polyacrylamide nucleoprotein gels in which it is included as a stabilizing agent. Polyacrylamide gel electrophoresis fractionates DNA and nucleosomes according to net negative charge, mass and conformation. With glycerol included, fractionation seems to be largely based on particle mass and charge. The conformation factor in separation is progressively lost with increasing glycerol concentrations. Nucleosome positions on the same DNA fragment are no longer resolved, while the difference in electrophoretic mobility between core particles and nucleosomes carrying longer DNA becomes smaller and is eventually lost. The retardation of bent DNA is also much reduced. Using the differences in separation characteristics between glycerol-containing and regular nucleoprotein gels could be a new means to obtain information on macromolecules in solution. C1 UNIV CALIF DAVIS,SCH MED,DEPT BIOL CHEM,DAVIS,CA 95616. LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. FU NIGMS NIH HHS [GM 26901] NR 25 TC 20 Z9 20 U1 0 U2 3 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD DEC 25 PY 1992 VL 20 IS 24 BP 6667 EP 6672 DI 10.1093/nar/20.24.6667 PG 6 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KG705 UT WOS:A1992KG70500030 PM 1480488 ER PT J AU BULTMAN, SJ MICHAUD, EJ WOYCHIK, RP AF BULTMAN, SJ MICHAUD, EJ WOYCHIK, RP TI MOLECULAR CHARACTERIZATION OF THE MOUSE AGOUTI LOCUS SO CELL LA English DT Article ID MAJOR HISTOCOMPATIBILITY COMPLEX; LIMB DEFORMITY; SEQUENCE-ANALYSIS; GENE; RECOMBINATION; MUTATIONS; MICE; ORGANIZATION; TRANSCRIPTS; CLEAVAGE AB The agouti (a) locus acts within the microenvironment of the hair follicle to regulate coat color pigmentation in the mouse. We have characterized a gene encoding a novel 131 amino acid protein that we propose is the one gene associated with the agouti locus. This gene is normally expressed in a manner consistent with a locus function, and, more importantly, its structure and expression are affected by a number of representative alleles in the agouti dominance hierarchy. In addition, we found that the pleiotropic effects associated with the lethal yellow (A(y)) mutation, which include pronounced obesity, diabetes, and the development of neoplasms, are accompanied by deregulated overexpression of the agouti gene in numerous tissues of the adult animal. C1 UNIV TENNESSEE,SCH BIOMED SCI,DIV BIOL,OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP BULTMAN, SJ (reprint author), OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831, USA. FU NIEHS NIH HHS [IAG 222Y01-ES-10067] NR 65 TC 602 Z9 626 U1 0 U2 16 PU CELL PRESS PI CAMBRIDGE PA 1050 MASSACHUSETTES AVE, CIRCULATION DEPT, CAMBRIDGE, MA 02138 SN 0092-8674 J9 CELL JI Cell PD DEC 24 PY 1992 VL 71 IS 7 BP 1195 EP 1204 DI 10.1016/S0092-8674(05)80067-4 PG 10 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KE604 UT WOS:A1992KE60400013 PM 1473152 ER PT J AU BRINCA, AL DEAGUA, LB WINSKE, D AF BRINCA, AL DEAGUA, LB WINSKE, D TI NONGYROTROPY AS A SOURCE OF INSTABILITY AND MODE-COUPLING SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID IONS AB Nongyrotropic particle populations can bring about linear mode coupling in homogeneous media among the three eigenmodes of parallel propagation in gyrotropic magnetoplasmas. These interactions stimulate, in general, wave activity that does not occur in corresponding (random gyrophase) gyrotropic ambients. Solutions of the dispersion equation illustrate that simple introduction of gyrophase organization can (i) excite electrostatic (and electromagnetic) perturbations in media whose free energy sources are solely electromagnetic, and (ii) drive hybrid (both electrostatic and electromagnetic) wave growth in thoroughly stable Maxwellian plasmas. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. RP BRINCA, AL (reprint author), Univ Tecn Lisboa, INST SUPER TECN, CTR ELECTRODINAM, P-1096 LISBON, PORTUGAL. RI Borda-de-Agua, Luis/D-6063-2011 OI Borda-de-Agua, Luis/0000-0002-0802-6235 NR 12 TC 24 Z9 24 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD DEC 24 PY 1992 VL 19 IS 24 BP 2445 EP 2448 DI 10.1029/92GL01942 PG 4 WC Geosciences, Multidisciplinary SC Geology GA KG677 UT WOS:A1992KG67700022 ER PT J AU ENGELKE, R AF ENGELKE, R TI ABINITIO CORRELATED CALCULATIONS OF 6 N6 ISOMERS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID N-6 ENERGY HYPERSURFACE; STABLE POINTS; HEXAAZABENZENE AB MP2/6-31G*//MP2/6-31G* structures, energies, and vibrational frequencies have been calculated for six N6 isomers. These isomers are the nitrogen analogues of the following carbon structures: benzene, Dewar benzene, benzene, triprismane, bicyclopropenyl, and a diazide. They are of interest because there are experimentally known metastable isoelectronic CH structures in some cases and because of the predicted extremely high-energy content of the nitrogen forms relative to three N2 molecules. These characteristics make some of the N6 structures prime candidates as energetic materials. The nitrogen structures are also of interest from the standpoint of quantum-chemical theory because the character (i.e., the number of imaginary vibrational frequencies) of their energy hypersurface stationary points is a strong function of the theoretical model used, e.g., of basis set quality and/or of whether electron correlation is included in the model. Comparisons are made with a variety of ab-initio models to illustrate this point. RP ENGELKE, R (reprint author), LOS ALAMOS NATL LAB,MS P952,LOS ALAMOS,NM 87545, USA. NR 15 TC 69 Z9 70 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD DEC 24 PY 1992 VL 96 IS 26 BP 10789 EP 10792 DI 10.1021/j100205a037 PG 4 WC Chemistry, Physical SC Chemistry GA KE711 UT WOS:A1992KE71100037 ER PT J AU HUPP, JT NEYHART, GA MEYER, TJ KOBER, EM AF HUPP, JT NEYHART, GA MEYER, TJ KOBER, EM TI ENERGY RELATIONSHIPS IN OPTICAL AND THERMAL ELECTRON-TRANSFER - TEMPERATURE-DEPENDENCE OF AN INTERVALENCE TRANSFER ABSORPTION-BAND SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID VALENCE ION <(BPY)2CLRU(PYZ)RUCL(BPY)2>3+; DIFFERENT COORDINATION ENVIRONMENTS; RUTHENIUM(III) AMMINE COMPLEXES; CHARGE-TRANSFER TRANSITIONS; LIGAND-BRIDGED COMPLEXES; METAL-METAL INTERACTIONS; TRANSFER RATE CONSTANTS; MIXED-VALENCE; POLAR-SOLVENTS; REDOX COUPLES AB The temperature dependence of the intervalence transfer (IT) band for the transition [(bpy)2ClRuII(pz)RuIII(NH3)5]4+ --> [(bpy)2ClRuIII(pz)RuII(NH3)5]4+ (pz = pyrazine; bpy = 2,2'-bipyridine) has been studied in CH3OD and in a nitrile solvent mixture. The temperature dependences of E1/2 for the component Ru(III/II) couples in this complex were also studied b cyclic voltammetry. The temperature dependence of the absorption band, which was quite large, (partial derivative E(op)/partial derivative T) = -10 cm-1 K-1 in CH3OD, mu = 0.035 M, was found to be the same, within experimental error, as the temperature dependence of the difference between the E1/2 values for the Ru(III/II) couples. This agreement provides experimental evidence that the absorption band energy includes the free energy change between the initial and final states and not just the change in enthalpy or internal energy. This is consistent with a model proposed by Marcus and Sutin for electron-transfer based on free energy surfaces despite the inability of the dielectric continuum model to account for the solvent-dependent behavior of this dimer. A quantum mechanical model is also found to predict that the absorption band energy should be temperature dependent because the band energy depends upon the free energy change. This model is based on potential energy surfaces and harmonic oscillator wave functions but includes differences in frequencies and reorganizational energies between the initial and final states, which is the crucial feature for the definition of an entropic change. Complications appear in the relationships that exist between optical and thermal electron transfer, and they are presented and discussed. C1 LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. RP HUPP, JT (reprint author), UNIV N CAROLINA, DEPT CHEM, CHAPEL HILL, NC 27599 USA. RI Hupp, Joseph/K-8844-2012 OI Hupp, Joseph/0000-0003-3982-9812 NR 90 TC 67 Z9 67 U1 1 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD DEC 24 PY 1992 VL 96 IS 26 BP 10820 EP 10830 DI 10.1021/j100205a042 PG 11 WC Chemistry, Physical SC Chemistry GA KE711 UT WOS:A1992KE71100042 ER PT J AU ROY, RN VOGEL, KM GOOD, CE DAVIS, WB ROY, LN JOHNSON, DA FELMY, AR PITZER, KS AF ROY, RN VOGEL, KM GOOD, CE DAVIS, WB ROY, LN JOHNSON, DA FELMY, AR PITZER, KS TI ACTIVITY-COEFFICIENTS IN ELECTROLYTE MIXTURES - HCL+THCL4+H2O FOR 5-55-DEGREES-C SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID ORDER ELECTROSTATIC TERMS; OSMOTIC COEFFICIENTS; THERMODYNAMICS; THORIUM(IV); IONS AB The emf of the cell without liquid junction (A) was used to study the HCl + ThCl4 + H2O mixed electrolyte system. The Pt, H-2(g,1 atm)\HCl(m(A)), ThCl4(m(B))\AgCl,Ag (A) emf was measured for solutions at constant total ionic strengths of 0.006, 0.008, 0.01, 0.05, 0.1, 0.25, 0.5, 1.0, 2.0, and 3.0 mol.kg-1 and at temperatures ranging from 5 to 55-degrees-C. The mean activity coefficients of HCl in the mixtures were calculated using the Nernst equation. Two detailed treatments are given of the data for 25-degrees-C. In the first, the Harned equations were fitted to the activity coefficient data using least-squares regression techniques. Results show that the quadratic equation is adequate for the full range of Y(B) to 0.9 for I less-than-or-equal-to 2.0 mol.kg-1 but only for smaller Y(B) at I = 3.0. Second, an ion-interaction (Pitzer) equation treatment is given in which experimental isopiestic measurements, solubility, and the activity coefficient data are analyzed and the necessary parameters developed for the H+-Th4+-Cl--H2O system. C1 SPRING ARBOR COLL, DEPT CHEM, SPRING ARBOR, MI 49283 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA. LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RP ROY, RN (reprint author), DRURY COLL, DEPT CHEM, SPRINGFIELD, MO 65802 USA. NR 27 TC 25 Z9 25 U1 1 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD DEC 24 PY 1992 VL 96 IS 26 BP 11065 EP 11072 DI 10.1021/j100205a081 PG 8 WC Chemistry, Physical SC Chemistry GA KE711 UT WOS:A1992KE71100081 ER PT J AU IONOVA, GV PERSHINA, V JOHNSON, E FRICKE, B SCHADEL, M AF IONOVA, GV PERSHINA, V JOHNSON, E FRICKE, B SCHADEL, M TI REDOX REACTIONS FOR GROUP-5 ELEMENTS, INCLUDING ELEMENT-105, IN AQUEOUS-SOLUTIONS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID STANDARD ELECTRODE-POTENTIALS; OXIDATION-STATES; P-ELEMENT; CHEMISTRY; KURCHATOVIUM; LAWRENCIUM; IONS AB Standard redox potentials E-degrees(M(z+x)/M(z+)) in acidic solutions for group 5 elements including element 105 (Ha) and the actinide, Pa, have been estimated on the basis of the ionization potentials calculated via the multiconfiguration Dirac-Fock method. Stability of the pentavalent state was shown to increase along the group from V to Ha, while that of the tetra- and trivalent states decreases in this direction. Our estimates have shown no extra stability of the trivalent state of hahnium. Element 105 should form mixed-valence complexes by analogy with Nb due to the similar values of their potentials E-degrees(M3+/M2+). The stability of the maximum oxidation state of the elements decreases in the direction 103 > 104 > 105. C1 GESELL SCHWERIONENFORSCH GMBH,POSTFACH 110552,W-6100 DARMSTADT 11,GERMANY. RUSSIAN ACAD SCI,INST PHYS CHEM,MOSCOW 117915,RUSSIA. UNIV KASSEL,DEPT THEORET PHYS,KASSEL,GERMANY. OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. NR 39 TC 19 Z9 20 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD DEC 24 PY 1992 VL 96 IS 26 BP 11096 EP 11101 DI 10.1021/j100205a086 PG 6 WC Chemistry, Physical SC Chemistry GA KE711 UT WOS:A1992KE71100086 ER PT J AU ASFAW, B BEYENE, Y SUWA, G WALTER, RC WHITE, TD WOLDEGABRIEL, G YEMANE, T AF ASFAW, B BEYENE, Y SUWA, G WALTER, RC WHITE, TD WOLDEGABRIEL, G YEMANE, T TI THE EARLIEST ACHEULEAN FROM KONSO-GARDULA SO NATURE LA English DT Article ID PALEOANTHROPOLOGICAL RESEARCH; KENYA; ETHIOPIA; OLORGESAILIE; PLEISTOCENE; CALIBRATION; TURKANA AB KONSO-GARDULA is a palaeoanthropological area discovered by the 1991 Palaeoanthropological Inventory of Ethiopia1-5 in the southern Main Ethiopian Rift. The Konso-Gardula sediments span the period about 1.3-1.9 million years ago. They contain rich Acheulean archaeological occurrences. Vertebrate fossils include early Homo. C1 UNIV TOKYO,DEPT ANTHROPOL,BUNKYO KU,TOKYO 113,JAPAN. CTR GEOCHRONOL,INST HUMAN ORIGINS,BERKELEY,CA 94709. UNIV CALIF BERKELEY,DEPT ANTHROPOL,HUMAN EVOLUT STUDIES LAB,BERKELEY,CA 94720. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. IOWA STATE UNIV SCI & TECHNOL,DEPT EARTH SCI,AMES,IA 50011. RP ASFAW, B (reprint author), MINIST CULTURE,PALAEOANTHROPOL LAB,POB 5717,ADDIS ABABA,ETHIOPIA. NR 30 TC 171 Z9 173 U1 2 U2 9 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD DEC 24 PY 1992 VL 360 IS 6406 BP 732 EP 735 DI 10.1038/360732a0 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KE472 UT WOS:A1992KE47200031 PM 1465142 ER PT J AU CASTEN, RF JOLIE, J BORNER, HG BRENNER, DS ZAMFIR, NV CHOU, WT APRAHAMIAN, A AF CASTEN, RF JOLIE, J BORNER, HG BRENNER, DS ZAMFIR, NV CHOU, WT APRAHAMIAN, A TI THE ENIGMA OF CD-114 - A CLASSICAL CASE OF AMBIGUITIES IN QUANTUM-MECHANICAL STATE MIXING SO PHYSICS LETTERS B LA English DT Article ID SPECTROSCOPY; N,GAMMA AB Lifetime measurements of levels near 2 MeV in Cd-114 give quantitative evidence for collective 3-phonon vibrational states. An analysis of the lever scheme reveals a remarkable ambiguity with origins in the basic properties of quantum mechanical mixing. C1 UNIV COLOGNE,W-5000 COLOGNE,GERMANY. INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE. UNIV FRIBOURG,CH-1700 FRIBOURG,SWITZERLAND. INST ATOM PHYS,BUCHAREST,ROMANIA. CLARK UNIV,WORCESTER,MA 01610. UNIV NOTRE DAME,NOTRE DAME,IN 46556. RP CASTEN, RF (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI Zamfir, Nicolae Victor/F-2544-2011 NR 15 TC 78 Z9 78 U1 1 U2 5 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 DEC 24 PY 1992 VL 297 IS 1-2 BP 19 EP 24 DI 10.1016/0370-2693(92)91062-E PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KE936 UT WOS:A1992KE93600004 ER PT J AU EISEMAN, SE ETKIN, A FOLEY, KJ HACKENBURG, RW LONGACRE, RS LOVE, WA MORRIS, TW PLATNER, ED SAULYS, AC LINDENBAUM, SJ CHAN, CS EFSTATHIADIS, E KRAMER, MA ZHAO, K ZHU, Y HALLMAN, TJ MADANSKY, L AHMAD, S BONNER, BE BUCHANAN, JA CHIOU, CN CLEMENT, JM MUTCHLER, GS AF EISEMAN, SE ETKIN, A FOLEY, KJ HACKENBURG, RW LONGACRE, RS LOVE, WA MORRIS, TW PLATNER, ED SAULYS, AC LINDENBAUM, SJ CHAN, CS EFSTATHIADIS, E KRAMER, MA ZHAO, K ZHU, Y HALLMAN, TJ MADANSKY, L AHMAD, S BONNER, BE BUCHANAN, JA CHIOU, CN CLEMENT, JM MUTCHLER, GS TI RAPIDITY DISTRIBUTIONS OF K-S(0)S AND LAMBDA-S PRODUCED BY 14.6XA GEV/C SI BEAMS ON SI AND PB TARGETS SO PHYSICS LETTERS B LA English DT Article ID SULFUR-TUNGSTEN INTERACTIONS; 200 GEV/C; PARTICLE-PRODUCTION; BAR-PRODUCTION; COLLISIONS; NUCLEON AB We present the first measurement at AGS energies of rapidity distributions of K(s)0 and LAMBDA production with silicon beams on silicon and lead targets. The measurements cover the rapidity region of 2.0 < y < 3.5 for K(s)0's and 1.4 < y < 3.2 for LAMBDA's. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. CUNY CITY COLL,NEW YORK,NY 10031. JOHNS HOPKINS UNIV HOSP,BALTIMORE,MD 21218. RICE UNIV,HOUSTON,TX 77251. NR 14 TC 28 Z9 28 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 DEC 24 PY 1992 VL 297 IS 1-2 BP 44 EP 48 DI 10.1016/0370-2693(92)91067-J PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KE936 UT WOS:A1992KE93600009 ER PT J AU LASSILA, KE PETRIDIS, A SUKHATME, UP WILK, G AF LASSILA, KE PETRIDIS, A SUKHATME, UP WILK, G TI SHADOWING OF THE GLUON IN FIXED TARGET EXPERIMENTS SO PHYSICS LETTERS B LA English DT Article ID DIRECT-PHOTON PRODUCTION; NUCLEAR-DEPENDENCE; QUARK DISTRIBUTIONS; SCATTERING AB The errors made in theoretical approximations comparing the ratio of cross sections directly with the ratio of structure functions for two (nuclear) targets are examined in a reliable model for the nuclear distortion of parton structure functions. For direct photon and lepton pair production, this approximation for gluon and sea ratios, respectively, is good to better than 5% at x < 0.2 and increases at larger x. C1 UNIV ILLINOIS,DEPT PHYS,CHICAGO,IL 60680. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DOE,AMES LAB,AMES,IA 50011. RP LASSILA, KE (reprint author), SOLTAN INST NUCL STUDIES,PL-00681 WARSAW,POLAND. NR 24 TC 3 Z9 3 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 DEC 24 PY 1992 VL 297 IS 1-2 BP 191 EP 196 DI 10.1016/0370-2693(92)91091-M PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KE936 UT WOS:A1992KE93600033 ER PT J AU AHMED, T ANDREEV, V ANDRIEU, B ARPAGAUS, M BABAYEV, A BARWOLFF, H BAN, J BARANOV, P BARRELET, E BARTEL, W BASSLER, U BECK, GA BECK, HP BEHREND, HJ BELOUSOV, A BERGER, C BERGSTEIN, H BERNARDI, G BERNET, R BERTHON, U BERTRANDCOREMANS, G BESANCON, M BIDDULPH, P BINDER, E BIZOT, JC BLOBEL, V BORRAS, K BOSETTI, PC BOUDRY, V BOURDARIOS, C BRASSE, F BRAUN, U BRAUNSCHWEIG, W BRISSON, V BRUNCKO, D BURGER, J BUSSER, FW BUNIATIAN, A BURKE, S BUSCHHORN, G CAMPBELL, AJ CARLI, T CHARLES, F CLARKE, D CLEGG, AB COLOMBO, M COUGHLAN, JA COURAU, A COUTURES, C COZZIKA, G CRIEGEE, L CVACH, J DAINTON, JB DANILOV, M DANN, AWE DAU, WD DAVID, M DEFFUR, E DELCOURT, B DELBUONO, L DEVEL, M DEROECK, A DINGUS, P DOLLFUS, C DOWELL, JD DREIS, HB DRESCHER, A DUBOC, J DULLMANN, D DUNGER, O DUHM, H EBERLE, M EBERT, J EBERT, TR ECKERLIN, G EFREMENKO, V EGLI, S EICHENBERGER, S EICHLER, R EISELE, F EISENHANDLER, E ELLIS, NN ELLISON, RJ ELSEN, E ERDMANN, M EVRARD, E FAVART, L FEDOTOV, A FEEKEN, D FELST, R FELTESSE, J FENG, Y FENSOME, IF FERENCEI, J FERRAROTTO, F FLAUGER, W FLEISCHER, M FLUGGE, G FOMENKO, A FOMINYKH, B FORBUSH, M FORMANEK, J FOSTER, JM FRANKE, G FRETWURST, E FUHRMANN, P GABATHULER, E GAMERDINGER, K GARVEY, J GAYLER, J GELLRICH, A GENNIS, M GENSCH, U GENZEL, H GERHARDS, R GILLESPIE, D GODFREY, L GOERLACH, U GOERLICH, L GOLDBERG, M GOODALL, AM GORELOV, I GORITCHEV, P GRAB, C GRASSLER, H GRASSLER, R GREENSHAW, T GREIF, H GRINDHAMMER, G GRUBER, C HAACK, J HAIDT, D HAJDUK, L HAMON, O HANDSCHUH, D HANLON, EM HAPKE, M HARJES, J HARTZ, P HAYDAR, R HAYNES, WJ HEATHERINGTON, J HEDBERG, V HEDGECOCK, R HEINZELMANN, G HENDERSON, RCW HENSCHEL, H HERMA, R HERYNEK, I HILDESHEIM, W HILL, P HILTON, CD HLADKY, J HOEGER, KC HUET, P HUFNAGEL, H HUOT, N IBBOTSON, M JABIOL, MA JACHOLKOWSKA, A JACOBSSON, C JAFFRE, M JONSSON, L JOHANNSEN, K JOHNSON, D JOHNSON, L JUNG, H KALMUS, PIP KASARIAN, S KASCHOWITZ, R KASSELMANN, P KATHAGE, U KAUFMANN, HH KENYON, IR KERMICHE, S KIESLING, C KLEIN, M KLEINWORT, C KNIES, G KOHLER, T KOLANOSKI, H KOLE, F KOLYA, SD KORBEL, V KORN, M KOSTKA, P KOTELNIKOV, SK KRASNY, MW KREHBIEL, H KRUCKER, D KRUGER, U KUBENKA, JP KUSTER, H KUHLEN, M KURCA, T KURZHOFER, J KUZNIK, B LANDER, R LANDON, MPJ LANGKAU, R LANIUS, P LAPORTE, JF LEBEDEV, A LENHARDT, U LEUSCHNER, A LEVERENZ, C LEVIN, D LEVONIAN, S LEY, C LINDSTROM, G LOCH, P LOHMANDER, H LOPEZ, GC LUERS, D MAGNUSSEN, N MALINOVSKI, E MANI, S MARAGE, P MARKS, J MARSHALL, R MARTENS, J MARTIN, R MARTYN, HU MARTYNIAK, J MASSON, S MAVROIDIS, A MAXFIELD, SJ MCMAHON, SJ MEHTA, A MEIER, K MERZ, T MEYER, CA MEYER, H MEYER, J MIKOCKI, S MILONE, V MONNIER, E MOREAU, F MOREELS, J MORRIS, JV MORTON, JM MULLER, K MURIN, P MURRAY, SA NAGOVIZIN, V NAROSKA, B NAUMANN, T NEWTON, D NGUYEN, HK NIEBERGALL, F NISIUS, R NOWAK, G NOYES, GW NYBERG, M OBERLACK, H OBROCK, U OLSSON, JE ORENSTEIN, S OULDSAADA, F PASCAUD, C PATEL, GD PEPPEL, E PETERS, S PHILLIPS, HT PHILLIPS, JP PICHLER, C PILGRAM, W PITZL, D PROSI, R RAUPACH, F RAUSCHNABEL, K REIMER, P RIBARICS, P RIECH, V RIEDLBERGER, J RIETZ, M ROBERTSON, SM ROBMANN, P ROOSEN, R ROSTOVTSEV, A ROYON, C RUDOWICZ, M RUFFER, M RUSAKOV, S RYBICKI, K RYSECK, E SACTON, J SAHLMANN, N SANCHEZ, E SANKEY, DP SAVITSKY, M SCHACHT, P SCHLEPER, P VONSCHLIPPE, W SCHMIDT, C SCHMIDT, D SCHMITZ, W SCHRODER, V SCHULZ, M SCHWIND, A SCOBEL, W SEEHAUSEN, U SELL, R SEMAN, M SEMENOV, A SHEKELYAN, V SHEVIAKOV, I SHOOSHTARI, H SIEGMON, G SIEWERT, U SIROIS, Y SKILLICORN, IO SMIRNOV, P SMITH, JR SMOLIK, L SOLOVIEV, Y SPITZER, H STAROBA, P STEENBOCK, M STEFFEN, P STEINBERG, R STEINER, H STELLA, B STEPHENS, K STRACHOTA, J STRAUMANN, U STRUCZINSKI, W SUTTON, JP TAYLOR, RE THOMPSON, G THOMPSON, RJ TICHOMIROV, I TRENKEL, C TRUOL, P TCHERNYSHOV, V TURNAU, J TUTAS, J URBAN, L USIK, A VALKAR, S VALKAROVA, A VALLEE, C VANESCH, P VARTAPETIAN, A VASDIK, J VECKO, M VERRECCHIA, P VICK, R VILLET, G VOGEL, E WACKER, K WALKER, IW WALTHER, A WEBER, G WEGENER, D WEGNER, A WELLISCH, HP WILLARD, S WINDE, M WINTER, GG WOLFF, MT WOMERSLEY, LA WRIGHT, AE WULFF, N YIOU, TP ZACEK, J ZAVADA, P ZEITNITZ, C ZIAEEPOUR, H ZIMMER, M ZIMMERMANN, W ZOMER, F AF AHMED, T ANDREEV, V ANDRIEU, B ARPAGAUS, M BABAYEV, A BARWOLFF, H BAN, J BARANOV, P BARRELET, E BARTEL, W BASSLER, U BECK, GA BECK, HP BEHREND, HJ BELOUSOV, A BERGER, C BERGSTEIN, H BERNARDI, G BERNET, R BERTHON, U BERTRANDCOREMANS, G BESANCON, M BIDDULPH, P BINDER, E BIZOT, JC BLOBEL, V BORRAS, K BOSETTI, PC BOUDRY, V BOURDARIOS, C BRASSE, F BRAUN, U BRAUNSCHWEIG, W BRISSON, V BRUNCKO, D BURGER, J BUSSER, FW BUNIATIAN, A BURKE, S BUSCHHORN, G CAMPBELL, AJ CARLI, T CHARLES, F CLARKE, D CLEGG, AB COLOMBO, M COUGHLAN, JA COURAU, A COUTURES, C COZZIKA, G CRIEGEE, L CVACH, J DAINTON, JB DANILOV, M DANN, AWE DAU, WD DAVID, M DEFFUR, E DELCOURT, B DELBUONO, L DEVEL, M DEROECK, A DINGUS, P DOLLFUS, C DOWELL, JD DREIS, HB DRESCHER, A DUBOC, J DULLMANN, D DUNGER, O DUHM, H EBERLE, M EBERT, J EBERT, TR ECKERLIN, G EFREMENKO, V EGLI, S EICHENBERGER, S EICHLER, R EISELE, F EISENHANDLER, E ELLIS, NN ELLISON, RJ ELSEN, E ERDMANN, M EVRARD, E FAVART, L FEDOTOV, A FEEKEN, D FELST, R FELTESSE, J FENG, Y FENSOME, IF FERENCEI, J FERRAROTTO, F FLAUGER, W FLEISCHER, M FLUGGE, G FOMENKO, A FOMINYKH, B FORBUSH, M FORMANEK, J FOSTER, JM FRANKE, G FRETWURST, E FUHRMANN, P GABATHULER, E GAMERDINGER, K GARVEY, J GAYLER, J GELLRICH, A GENNIS, M GENSCH, U GENZEL, H GERHARDS, R GILLESPIE, D GODFREY, L GOERLACH, U GOERLICH, L GOLDBERG, M GOODALL, AM GORELOV, I GORITCHEV, P GRAB, C GRASSLER, H GRASSLER, R GREENSHAW, T GREIF, H GRINDHAMMER, G GRUBER, C HAACK, J HAIDT, D HAJDUK, L HAMON, O HANDSCHUH, D HANLON, EM HAPKE, M HARJES, J HARTZ, P HAYDAR, R HAYNES, WJ HEATHERINGTON, J HEDBERG, V HEDGECOCK, R HEINZELMANN, G HENDERSON, RCW HENSCHEL, H HERMA, R HERYNEK, I HILDESHEIM, W HILL, P HILTON, CD HLADKY, J HOEGER, KC HUET, P HUFNAGEL, H HUOT, N IBBOTSON, M JABIOL, MA JACHOLKOWSKA, A JACOBSSON, C JAFFRE, M JONSSON, L JOHANNSEN, K JOHNSON, D JOHNSON, L JUNG, H KALMUS, PIP KASARIAN, S KASCHOWITZ, R KASSELMANN, P KATHAGE, U KAUFMANN, HH KENYON, IR KERMICHE, S KIESLING, C KLEIN, M KLEINWORT, C KNIES, G KOHLER, T KOLANOSKI, H KOLE, F KOLYA, SD KORBEL, V KORN, M KOSTKA, P KOTELNIKOV, SK KRASNY, MW KREHBIEL, H KRUCKER, D KRUGER, U KUBENKA, JP KUSTER, H KUHLEN, M KURCA, T KURZHOFER, J KUZNIK, B LANDER, R LANDON, MPJ LANGKAU, R LANIUS, P LAPORTE, JF LEBEDEV, A LENHARDT, U LEUSCHNER, A LEVERENZ, C LEVIN, D LEVONIAN, S LEY, C LINDSTROM, G LOCH, P LOHMANDER, H LOPEZ, GC LUERS, D MAGNUSSEN, N MALINOVSKI, E MANI, S MARAGE, P MARKS, J MARSHALL, R MARTENS, J MARTIN, R MARTYN, HU MARTYNIAK, J MASSON, S MAVROIDIS, A MAXFIELD, SJ MCMAHON, SJ MEHTA, A MEIER, K MERZ, T MEYER, CA MEYER, H MEYER, J MIKOCKI, S MILONE, V MONNIER, E MOREAU, F MOREELS, J MORRIS, JV MORTON, JM MULLER, K MURIN, P MURRAY, SA NAGOVIZIN, V NAROSKA, B NAUMANN, T NEWTON, D NGUYEN, HK NIEBERGALL, F NISIUS, R NOWAK, G NOYES, GW NYBERG, M OBERLACK, H OBROCK, U OLSSON, JE ORENSTEIN, S OULDSAADA, F PASCAUD, C PATEL, GD PEPPEL, E PETERS, S PHILLIPS, HT PHILLIPS, JP PICHLER, C PILGRAM, W PITZL, D PROSI, R RAUPACH, F RAUSCHNABEL, K REIMER, P RIBARICS, P RIECH, V RIEDLBERGER, J RIETZ, M ROBERTSON, SM ROBMANN, P ROOSEN, R ROSTOVTSEV, A ROYON, C RUDOWICZ, M RUFFER, M RUSAKOV, S RYBICKI, K RYSECK, E SACTON, J SAHLMANN, N SANCHEZ, E SANKEY, DP SAVITSKY, M SCHACHT, P SCHLEPER, P VONSCHLIPPE, W SCHMIDT, C SCHMIDT, D SCHMITZ, W SCHRODER, V SCHULZ, M SCHWIND, A SCOBEL, W SEEHAUSEN, U SELL, R SEMAN, M SEMENOV, A SHEKELYAN, V SHEVIAKOV, I SHOOSHTARI, H SIEGMON, G SIEWERT, U SIROIS, Y SKILLICORN, IO SMIRNOV, P SMITH, JR SMOLIK, L SOLOVIEV, Y SPITZER, H STAROBA, P STEENBOCK, M STEFFEN, P STEINBERG, R STEINER, H STELLA, B STEPHENS, K STRACHOTA, J STRAUMANN, U STRUCZINSKI, W SUTTON, JP TAYLOR, RE THOMPSON, G THOMPSON, RJ TICHOMIROV, I TRENKEL, C TRUOL, P TCHERNYSHOV, V TURNAU, J TUTAS, J URBAN, L USIK, A VALKAR, S VALKAROVA, A VALLEE, C VANESCH, P VARTAPETIAN, A VASDIK, J VECKO, M VERRECCHIA, P VICK, R VILLET, G VOGEL, E WACKER, K WALKER, IW WALTHER, A WEBER, G WEGENER, D WEGNER, A WELLISCH, HP WILLARD, S WINDE, M WINTER, GG WOLFF, MT WOMERSLEY, LA WRIGHT, AE WULFF, N YIOU, TP ZACEK, J ZAVADA, P ZEITNITZ, C ZIAEEPOUR, H ZIMMER, M ZIMMERMANN, W ZOMER, F TI HARD SCATTERING IN GAMMA-P INTERACTIONS SO PHYSICS LETTERS B LA English DT Article ID LUND MONTE-CARLO; JET FRAGMENTATION; E+E-PHYSICS AB We report on the investigation of the final state in interactions of quasi-real photons with protons. The data were taken with the H1 detector at the HERA ep collider. Evidence for hard interactions is seen in both single particle spectra and jet formation. The data can best be described by inclusion of resolved photon processes as predicted by QCD. C1 SV LEBEDEV PHYS INST,MOSCOW 117924,RUSSIA. ECOLE POLYTECH,LPNHE,CNRS,1N2P3,F-91128 PALAISEAU,FRANCE. ETH ZURICH,INST MITTELENERGIEPHYS,CH-5232 VILLIGEN,SWITZERLAND. MOSCOW THEORET & EXPTL PHYS INST,MOSCOW 117259,RUSSIA. DESY,INST HOCHENERGIEPHYS,O-1615 ZEUTHEN,GERMANY. SLOVAK ACAD SCI,INST EXPTL PHYS,CS-04353 KOSICE,CZECHOSLOVAKIA. UNIV PARIS 06,LPNHE,CNRS,IN2P3,F-75252 PARIS 05,FRANCE. UNIV PARIS 07,LPNHE,CNRS,IN2P3,F-75252 PARIS 05,FRANCE. DESY,W-2000 HAMBURG 52,GERMANY. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND. UNIV ZURICH,INST PHYS,CH-8001 ZURICH,SWITZERLAND. RHEIN WESTFAL TH AACHEN,INST PHYS 1,W-5100 AACHEN,GERMANY. ULB,VUB,INTER UNIV INST HIGH ENERGIES,B-1050 BRUSSELS,BELGIUM. CTR ETUD SACLAY,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. UNIV MANCHESTER,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND. UNIV PARIS 11,LAL,CNRS,IN2P3,F-91405 ORSAY,FRANCE. UNIV HAMBURG,INST EXPTL PHYS 2,W-2000 HAMBURG 50,GERMANY. UNIV DORTMUND,INST PHYS,W-4600 DORTMUND 50,GERMANY. RHEIN WESTFAL TH AACHEN,INST PHYS 3,W-5100 AACHEN,GERMANY. MAX PLANCK INST PHYS & ASTROPHYS,W-8000 MUNICH 40,GERMANY. UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW G12 8QQ,SCOTLAND. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. UNIV KIEL,INST REINE & ANGEW KERNPHYS,W-2300 KIEL 1,GERMANY. UNIV HAMBURG,INST EXPTL PHYS 1,W-2000 HAMBURG 13,GERMANY. BERG UNIV GESAMTHSCH WUPPERTAL,W-5600 WUPPERTAL 1,GERMANY. QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND. UNIV ROME LA SAPIENZA,DIPARTIMENTO FIS,I-00185 ROME,ITALY. INFN,ROME,ITALY. UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616. UNIV CALIF DAVIS,IIRPA,DAVIS,CA 95616. CHARLES UNIV,CTR NUCL,CS-18000 PRAGUE 8,CZECHOSLOVAKIA. INST NUCL PHYS,PL-31342 KRAKOW,POLAND. UNIV LUND,DEPT PHYS,S-22362 LUND,SWEDEN. CZECHOSLOVAK ACAD SCI,INST PHYS,CS-18040 PRAGUE,CZECHOSLOVAKIA. RP AHMED, T (reprint author), UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. RI Kotelnikov, Sergey/A-9711-2014; Cvach, Jaroslav/G-6269-2014; Belousov, Anatoli/N-2102-2015; Gorelov, Igor/J-9010-2015; Sheviakov, Igor/N-2735-2015; Danilov, Mikhail/C-5380-2014; Staroba, Pavel/G-8850-2014; DEVEL, Michel/A-5677-2009; Meyer, Curtis/L-3488-2014; Soloviev, Yury/M-8788-2015; Levonian, Sergey/M-8693-2015; Andreev, Vladimir/M-8665-2015; Fomenko, Alexander/I-7900-2014; Malinovski, Evgenii/N-1034-2015 OI Kotelnikov, Sergey/0000-0002-8027-4612; Erdmann, Martin/0000-0002-1653-1303; Beck, Hans Peter/0000-0001-7212-1096; Bassler, Ursula/0000-0002-9041-3057; Gorelov, Igor/0000-0001-5570-0133; Sheviakov, Igor/0000-0002-1659-3483; Danilov, Mikhail/0000-0001-9227-5164; DEVEL, Michel/0000-0001-8785-6896; Meyer, Curtis/0000-0001-7599-3973; Soloviev, Yury/0000-0003-1136-2827; NR 14 TC 86 Z9 86 U1 0 U2 2 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 DEC 24 PY 1992 VL 297 IS 1-2 BP 205 EP 213 DI 10.1016/0370-2693(92)91094-P PG 9 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KE936 UT WOS:A1992KE93600036 ER PT J AU AMSLER, C AUGUSTIN, I BAKER, CA BARNETT, BM BATTY, CJ BEUCHERT, K BIRIEN, P BISTIRLICH, J BLUM, P BOSSINGHAM, R BOSSY, H BRAUNE, K BROSE, J BUGG, DV BURCHELL, M CASE, T COOPER, A CROWE, KM DIETZ, HP VONDOMBROWSKI, S DOSER, M DUNNWEBER, W ENGELHARDT, D ENGLERT, M FAESSLER, MA FELIX, C FOLGER, G HACKMANN, R HADDOCK, RP HEINSIUS, FH HESSEY, NP HIDAS, P ILLINGER, P JAMNIK, D KALINOWSKY, H KAMMLE, B KIEL, T KISIEL, J KLEMPT, E KOBEL, M KOCH, H KOLO, C KONIGSMANN, K KUNZE, M LANDUA, R LUDEMANN, J MATTHAEY, H MERKEL, M MERLO, JP MEYER, CA MEYERBERKHOUT, U MONTANET, L NOBLE, A PETERS, K PINTER, G RAVNDAL, S SANJARI, AH SCHAFER, E SCHMID, B SCHMIDT, P SPANIER, S STRASSBURGER, C STROHBUSCH, U SUFFERT, M URNER, D VOLCKER, C WALTER, F WALTHER, D WIEDNER, U WINTER, N ZOLL, J ZUPANCIC, C AF AMSLER, C AUGUSTIN, I BAKER, CA BARNETT, BM BATTY, CJ BEUCHERT, K BIRIEN, P BISTIRLICH, J BLUM, P BOSSINGHAM, R BOSSY, H BRAUNE, K BROSE, J BUGG, DV BURCHELL, M CASE, T COOPER, A CROWE, KM DIETZ, HP VONDOMBROWSKI, S DOSER, M DUNNWEBER, W ENGELHARDT, D ENGLERT, M FAESSLER, MA FELIX, C FOLGER, G HACKMANN, R HADDOCK, RP HEINSIUS, FH HESSEY, NP HIDAS, P ILLINGER, P JAMNIK, D KALINOWSKY, H KAMMLE, B KIEL, T KISIEL, J KLEMPT, E KOBEL, M KOCH, H KOLO, C KONIGSMANN, K KUNZE, M LANDUA, R LUDEMANN, J MATTHAEY, H MERKEL, M MERLO, JP MEYER, CA MEYERBERKHOUT, U MONTANET, L NOBLE, A PETERS, K PINTER, G RAVNDAL, S SANJARI, AH SCHAFER, E SCHMID, B SCHMIDT, P SPANIER, S STRASSBURGER, C STROHBUSCH, U SUFFERT, M URNER, D VOLCKER, C WALTER, F WALTHER, D WIEDNER, U WINTER, N ZOLL, J ZUPANCIC, C TI P-WAVE VERSUS S-WAVE (P)OVER-BAR-P-ANNIHILATION AT REST IN LH2 SO PHYSICS LETTERS B LA English DT Article ID ANTIPROTONIC-HYDROGEN; ANNIHILATION; PROTONIUM; CAPTURE; STATE AB The annihilation ppBAR --> pi0pi0 was measured for antiprotons stopped in liquid hydrogen (LH2). This reaction is only allowed from odd angular momentum states of the ppBAR-atom. The resulting branching ratio BR(ppBAR --> pi0pi0)LH2 = (6.93 +/- 0.22stat +/- 0.37syst) x 10(-4), combined with a previous measurement of the branching ratio BR(ppBAR --> pi+pi-)2P in gas from the 2P-state of ppBAR suggests a fraction of P-wave annihilation in LH2 Of (28.8 +/- 3.5)%, much larger than the values obtained from other annihilation channels. A method of reconciling the contradictory results is discussed. C1 UNIV KARLSRUHE,W-7500 KARLSRUHE,GERMANY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV MAINZ,W-6500 MAINZ,GERMANY. RUHR UNIV BOCHUM,W-4630 BOCHUM,GERMANY. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV MUNICH,W-8000 MUNICH 2,GERMANY. QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND. CERN,CH-1211 GENEVA 23,SWITZERLAND. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. UNIV HAMBURG,W-2000 HAMBURG 13,GERMANY. ACAD SCI BUDAPEST,H-1525 BUDAPEST,HUNGARY. CTR RECH NUCL,F-67037 STRASBOURG,FRANCE. RP AMSLER, C (reprint author), UNIV ZURICH,CH-8001 ZURICH,SWITZERLAND. RI Meyer, Curtis/L-3488-2014 OI Meyer, Curtis/0000-0001-7599-3973 NR 22 TC 45 Z9 45 U1 0 U2 1 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 DEC 24 PY 1992 VL 297 IS 1-2 BP 214 EP 218 DI 10.1016/0370-2693(92)91095-Q PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KE936 UT WOS:A1992KE93600037 ER PT J AU CHOU, MH BRUNSCHWIG, BS CREUTZ, C SUTIN, N YEH, A CHANG, RC LIN, CT AF CHOU, MH BRUNSCHWIG, BS CREUTZ, C SUTIN, N YEH, A CHANG, RC LIN, CT TI FACILE AMIDO TO PYRIDYL ISOMERIZATION - PENTAAMMINERUTHENIUM(II) WALKS THE NICOTINAMIDE AND ISONICOTINAMIDE RINGS SO INORGANIC CHEMISTRY LA English DT Note ID COMPLEXES; RUTHENIUM(II) C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. CHUNG YUAN CHRISTIAN UNIV,DEPT CHEM,CHUNGLI,TAIWAN. TUNGHAI CHRISTIAN UNIV,DEPT CHEM,TAICHANG,TAIWAN. RI Brunschwig, Bruce/G-4249-2011 NR 15 TC 32 Z9 32 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD DEC 23 PY 1992 VL 31 IS 26 BP 5347 EP 5348 DI 10.1021/ic00052a003 PG 2 WC Chemistry, Inorganic & Nuclear SC Chemistry GA KE754 UT WOS:A1992KE75400003 ER PT J AU HOPKINS, MD MISKOWSKI, VM KILLOUGH, PM SATTELBERGER, AP WOODRUFF, WH GRAY, HB AF HOPKINS, MD MISKOWSKI, VM KILLOUGH, PM SATTELBERGER, AP WOODRUFF, WH GRAY, HB TI FAR-INFRARED SPECTROSCOPY OF QUADRUPLY BONDED M2X4L4 COMPLEXES SO INORGANIC CHEMISTRY LA English DT Article ID VIBRATIONAL-SPECTRA; TETRAHALODIMOLYBDENUM(II) COMPLEXES; ELECTRONIC-STRUCTURES; TORSIONAL BARRIERS; MULTITOP MOLECULES; RAMAN-SPECTRA; MOLYBDENUM; CRYSTAL; DIMERS; STATE AB Far-infrared spectra are reported for mulls of the compounds Mo2X4L4 (X = Cl, Br, I;L = PMe3, PEt3, P(n-Pr)3, P(n-Bu)3, AsMe3) and W2Cl4(PMe3)4 and for a single crystal Of Mo2Cl4(PMe3)4. Assignments have been made, using predictions of absorption intensities from a vector addition model and of freqencies by correlations to related molecules, of the nu6 [b2, nu(MX)], nu8 [b2, delta(MMX)], nu10 [e, nu(MX)], and nu11 [e, nu(MP)] modes. The spectra of Mo2Cl4(PR3)4 complexes are complicated by the presence of internal ligand deformation modes in the same frequency region as nu10. C1 LOS ALAMOS NATL LAB,DIV ISOTOPE & NUCL CHEM,INORGAN & STRUCT CHEM GRP INC-4,LOS ALAMOS,NM 87545. CALTECH,ARTHUR AMOS NOYES LAB CHEM PHYS,PASADENA,CA 91125. RP HOPKINS, MD (reprint author), UNIV PITTSBURGH,DEPT CHEM,PITTSBURGH,PA 15260, USA. NR 50 TC 5 Z9 5 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD DEC 23 PY 1992 VL 31 IS 26 BP 5368 EP 5374 DI 10.1021/ic00052a010 PG 7 WC Chemistry, Inorganic & Nuclear SC Chemistry GA KE754 UT WOS:A1992KE75400010 ER PT J AU MOTOOKA, T HOLLAND, OW AF MOTOOKA, T HOLLAND, OW TI AMORPHIZATION PROCESSES IN ION-IMPLANTED SI ION SPECIES EFFECTS SO APPLIED PHYSICS LETTERS LA English DT Article ID SILICON; DAMAGE AB Amorphization processes in Si+, P+, Ge+, and As+ ion implanted Si have been investigated using Raman spectroscopy and Rutherford backscattering spectrometry combined with computer simulations of the initial ion-beam-induced damage profiles. The crystal Si Raman peak at 520 cm-1 decreased, broadened, and shifted toward lower wave numbers as the doses were increased from 2 to 8 X 10(14) cm-2 for both 100 keV Si+ and P+, and from 0.6 to 1.8 X 10(14) cm-2 for both 175 keV Ge+ and As+. The maximum peak shifts prior to amorphization were approximately -6 cm-1 in all the samples suggesting that lattice softening is responsible for amorphization in all the ion species cases. The effects of ion species were analyzed by scaling the ion dose using calculated displacements per target atom (DPA). It was found that larger DPA was necessary to obtain the same peak shifts in the Si+ and P+ than in the Ge+ and As+ implantation cases. The results suggest that amorphization is controlled by divacancies generated by ion bombardment. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP MOTOOKA, T (reprint author), UNIV TSUKUBA,INST APPL PHYS,TSUKUBA,IBARAKI 305,JAPAN. NR 9 TC 49 Z9 49 U1 1 U2 7 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD DEC 21 PY 1992 VL 61 IS 25 BP 3005 EP 3007 DI 10.1063/1.108017 PG 3 WC Physics, Applied SC Physics GA KC860 UT WOS:A1992KC86000019 ER PT J AU WALLECZEK, J BUDINGER, TF AF WALLECZEK, J BUDINGER, TF TI PULSED MAGNETIC-FIELD EFFECTS ON CALCIUM SIGNALING IN LYMPHOCYTES - DEPENDENCE ON CELL STATUS AND FIELD INTENSITY SO FEBS LETTERS LA English DT Article DE CALCIUM; IMMUNE SYSTEM; SIGNAL TRANSDUCTION; ELF ELECTROMAGNETIC FIELD; RADICAL PAIR MECHANISM; RAT THYMIC LYMPHOCYTE ID ELECTROMAGNETIC-FIELDS; RAT THYMOCYTES; BLASTOGENESIS AB The effect of 3-Hz, monopolar, quasi-rectangular magnetic field pulses on Ca-45(2+) uptake in resting and mitogen-treated rat thymic lymphocytes was evaluated. A 30-min, non-thermal exposure to the pulsed magnetic field (B(peak) = 6.5 mT, E(max) = 0.69 mV/cm, J(max) = 2.6 muA/CM2) reduced Concanavalin A-induced Ca-45(2+) uptake by 45%. It was observed that (i) the induction of the 3-Hz field response dependend on Ca2+ signal transduction activation; (ii) the response direction (stimulation or inhibition) depended on the level of lymphocyte mitogen responsiveness, and (iii) the field response magnitude increased with increasing magnetic field flux densities (B(peak) = 0, 1.6, 6.5 and 28 mT). Our results demonstrate field effects at B(max) nearly 10(4) greater than that of the average human environment for low-frequency magnetic fields and they are consistent with the independent results from other 3-Hz pulsed magnetic field studies with lymphocytes. C1 LAWRENCE BERKELEY LAB,CTR FUNCT IMAGING,BERKELEY,CA 94720. NR 27 TC 96 Z9 96 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0014-5793 J9 FEBS LETT JI FEBS Lett. PD DEC 21 PY 1992 VL 314 IS 3 BP 351 EP 355 DI 10.1016/0014-5793(92)81504-F PG 5 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA KD507 UT WOS:A1992KD50700033 PM 1468568 ER PT J AU HAIDER, Q LIU, LC AF HAIDER, Q LIU, LC TI FOURIER OF BESSEL TRANSFORMATIONS OF HIGHLY OSCILLATORY FUNCTIONS SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article ID CHARGE-EXCHANGE REACTIONS AB An algorithm for integral transformation of highly oscillatory functions is presented. It is a generalization of the 'standard' Gaussian quadrature method but has the virtue that the usual tedious tests of convergence of the numerical results is not necessary. The effectiveness and accuracy of the algorithm is tested for both large arguments and higher orders of the Bessel function. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP HAIDER, Q (reprint author), FORDHAM UNIV,DEPT PHYS,BRONX,NY 10458, USA. NR 11 TC 10 Z9 10 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD DEC 21 PY 1992 VL 25 IS 24 BP 6755 EP 6760 DI 10.1088/0305-4470/25/24/026 PG 6 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA KG649 UT WOS:A1992KG64900026 ER PT J AU MILLONAS, MM AF MILLONAS, MM TI A CONNECTIONIST TYPE MODEL OF SELF-ORGANIZED FORAGING AND EMERGENT BEHAVIOR IN ANT SWARMS SO JOURNAL OF THEORETICAL BIOLOGY LA English DT Article ID COMMUNICATION C1 LOS ALAMOS NATL LAB, DIV THEORET, CTR NONLINEAR STUDIES, LOS ALAMOS, NM 87545 USA. UNIV TEXAS, CTR STAT MECH & COMPLEX SYST, AUSTIN, TX 78712 USA. SANTA FE INST, COMPLEX SYST WINTER SCH, SANTA FE, NM 87501 USA. RP MILLONAS, MM (reprint author), LOS ALAMOS NATL LAB, DIV THEORET, COMPLEX SYST GRP, MS B258, LOS ALAMOS, NM 87545 USA. NR 50 TC 30 Z9 31 U1 0 U2 4 PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-5193 J9 J THEOR BIOL JI J. Theor. Biol. PD DEC 21 PY 1992 VL 159 IS 4 BP 529 EP 552 DI 10.1016/S0022-5193(05)80697-6 PG 24 WC Biology; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology GA KK605 UT WOS:A1992KK60500014 ER PT J AU SUMPTER, BG NOID, DW WUNDERLICH, B AF SUMPTER, BG NOID, DW WUNDERLICH, B TI COMPUTATIONAL EXPERIMENTS ON THE MOTION AND GENERATION OF DEFECTS IN POLYMER CRYSTALS SO MACROMOLECULES LA English DT Article ID MOLECULAR-DYNAMICS SIMULATIONS; PHASE-SPACE STRUCTURE; VIBRATIONAL-ENERGY; PERIODIC-ORBITS; SEMICLASSICAL CALCULATION; UNIMOLECULAR REACTIONS; RELAXATION PROCESSES; HAMILTONIAN-SYSTEMS; BOUND-STATES; POLYETHYLENE AB Computer experiments using the molecular dynamics method have been carried out in order to investigate the formation and motion of defects in polymer crystals. The simulations were carried out on a crystal of 12.6-nm-long chains consisting of 3700 CH2 groups over times of 20 ps, and preliminary results for crystals containing up to 30 000 atoms that include the hydrogens explicitly are discussed. Chain diffusion through the crystal is shown to involve sharply defined thermal conformational defects and longer-range soft twists. An activation energy for the formation of conformational defects is found to be on the order of 16 kJ/mol and an additional 'activation'' energy gradient of 4 kJ/mol is determined to be necessary to cause directed motion of a chain through the crystal. At 350 K the rate of conformational defect formation is about 10(10) s-1, causing doubling of a crystal in thickness on a time scale of 0.1 ns. Both structural and dynamical details of defect generation and motion are extracted from the extensive simulations, and the results are discussed in context to currently existing theories for lamellar thickening and relaxation behavior in polymer crystals. C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. RI Sumpter, Bobby/C-9459-2013 OI Sumpter, Bobby/0000-0001-6341-0355 NR 64 TC 34 Z9 34 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD DEC 21 PY 1992 VL 25 IS 26 BP 7247 EP 7255 DI 10.1021/ma00052a028 PG 9 WC Polymer Science SC Polymer Science GA KE277 UT WOS:A1992KE27700028 ER PT J AU FALK, AF NEUBERT, M LUKE, M AF FALK, AF NEUBERT, M LUKE, M TI THE RESIDUAL MASS TERM IN THE HEAVY QUARK EFFECTIVE THEORY SO NUCLEAR PHYSICS B LA English DT Article ID EFFECTIVE FIELD-THEORY; MESON FORM-FACTORS; STATIC QUARK; SEMILEPTONIC DECAYS; SUM-RULE; LATTICE; QCD; LIGHT; RENORMALIZATION; ANNIHILATION AB We reformulate the heavy quark effective theory in the presence of a residual mass term, which has been taken to vanish in previous analyses. While such a convention is permitted, the inclusion of a residual mass allows us to resolve a potential ambiguity in the choice of the expansion parameter which defines the effective theory. We show to subleading order in the mass expansion that physical quantities computed in the effective theory do not depend on the expansion parameter. C1 UNIV CALIF SAN DIEGO,DEPT PHYS B019,LA JOLLA,CA 92093. RP FALK, AF (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 47 TC 91 Z9 91 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD DEC 21 PY 1992 VL 388 IS 2 BP 363 EP 375 DI 10.1016/0550-3213(92)90617-K PG 13 WC Physics, Particles & Fields SC Physics GA KJ686 UT WOS:A1992KJ68600004 ER PT J AU BENMENAHEM, S COOPER, AR AF BENMENAHEM, S COOPER, AR TI SUPERCONDUCTIVITY SOLVES THE MONOPOLE PROBLEM FOR ALICE STRINGS SO NUCLEAR PHYSICS B LA English DT Article ID DISCRETE SYMMETRY; CAUSALITY AB Alice strings are cosmic strings that turn matter into antimatter. Although they arise naturally in many GUTs, it has long been believed that because of the monopole problem they can have no cosmological effects. We show this conclusion to be false; by using the Langacker-Pi mechanism, monopoles can in fact be annihilated while Alice strings are left intact. This opens up the possibility that they can after all contribute to cosmology, and we mention some particularly important examples. C1 UNIV SO CALIF,DEPT PHYS,LOS ANGELES,CA 90089. RP BENMENAHEM, S (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 18 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD DEC 21 PY 1992 VL 388 IS 2 BP 393 EP 408 DI 10.1016/0550-3213(92)90619-M PG 16 WC Physics, Particles & Fields SC Physics GA KJ686 UT WOS:A1992KJ68600006 ER PT J AU BENMENAHEM, S COOPER, AR AF BENMENAHEM, S COOPER, AR TI BARYOGENESIS FROM UNSTABLE DOMAIN-WALLS SO NUCLEAR PHYSICS B LA English DT Article ID DISCRETE SYMMETRY; STRINGS AB There exists a class of cosmic strings that turn matter into antimatter (Alice strings). In a GUT where the unbroken gauge group contains charge conjugation (C), such strings form when a phase transition renders C a discrete symmetry. They become boundaries of domain walls at a later, C-breaking transition. These ''Alice walls'' are cosmologically harmless, but can play an important role in baryogenesis. We present a three-generation toy model with scalar baryons, where a quasi-static Alice wall (or a gas of such walls) temporarily gives rise to net baryogenesis of uniform sign everywhere in space. This becomes a permanent baryon excess if the wall shrinks away early enough, We comment on the possible relevance of a similar mechanism to baryogenesis in a realistic SO(10) unification model, where Alice walls would form at the scale of left-right symmetry breaking. C1 UNIV SO CALIF,DEPT PHYS,LOS ANGELES,CA 90089. RP BENMENAHEM, S (reprint author), STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 13 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD DEC 21 PY 1992 VL 388 IS 2 BP 409 EP 434 DI 10.1016/0550-3213(92)90620-Q PG 26 WC Physics, Particles & Fields SC Physics GA KJ686 UT WOS:A1992KJ68600007 ER PT J AU DEUTSCH, IH CHIAO, RY GARRISON, JC AF DEUTSCH, IH CHIAO, RY GARRISON, JC TI DIPHOTONS IN A NONLINEAR FABRY-PEROT RESONATOR - BOUND-STATES OF INTERACTING PHOTONS IN AN OPTICAL QUANTUM WIRE SO PHYSICAL REVIEW LETTERS LA English DT Article ID HARTREE APPROXIMATION; SCHRODINGER-EQUATION; SOLITON PROPAGATION AB We propose a high-Q Fabry-Perot resonator with cylindrical mirrors, operating near fundamental mode and filled with an alkali vapor, as the photonic analog to the electronic quantum wire. The internal photons constitute a 1D Bose gas with pairwise interactions. We solve for the two-photon bound state which determines a resonance for the two-photon transmission function. Emphasis is placed on the experimental feasibility of observing these quasiparticles. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP DEUTSCH, IH (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI Deutsch, Ivan/D-1882-2009 OI Deutsch, Ivan/0000-0002-1733-5750 NR 24 TC 37 Z9 37 U1 1 U2 3 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 DEC 21 PY 1992 VL 69 IS 25 BP 3627 EP 3630 DI 10.1103/PhysRevLett.69.3627 PG 4 WC Physics, Multidisciplinary SC Physics GA KC931 UT WOS:A1992KC93100009 ER PT J AU MOODY, JD MALMBERG, JH AF MOODY, JD MALMBERG, JH TI FREE EXPANSION OF A PURE ELECTRON-PLASMA COLUMN SO PHYSICAL REVIEW LETTERS LA English DT Article ID RESONANT PARTICLES; SOLITONS; HOLES AB The collective free expansion of a magnetized pure electron plasma column along the confining axial magnetic field is experimentally and theoretically investigated. A new hydrodynamic theory for nonlinear plasma wave evolution in a bounded cylinder is described which predicts the experimental results. The plasma free expansion is initially characterized by a self-similar plasma flow resulting in a perturbed density and velocity with no characteristic length scale. C1 UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093. RP MOODY, JD (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 5508,LIVERMORE,CA 94550, USA. NR 23 TC 4 Z9 4 U1 1 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 DEC 21 PY 1992 VL 69 IS 25 BP 3639 EP 3642 DI 10.1103/PhysRevLett.69.3639 PG 4 WC Physics, Multidisciplinary SC Physics GA KC931 UT WOS:A1992KC93100012 ER PT J AU TIKOFSKY, AM LAUGHLIN, RB ZOU, Z AF TIKOFSKY, AM LAUGHLIN, RB ZOU, Z TI COMPUTATION OF THE OPTICAL CONDUCTIVITY OF THE T-J MODEL USING ANYON TECHNIQUES SO PHYSICAL REVIEW LETTERS LA English DT Article ID FRACTIONAL-STATISTICS GAS; CHIRAL-SPIN-LIQUID; MOTT INSULATOR; GAUGE-THEORY; FLUX PHASES; STATE; SUPERCONDUCTORS; SYSTEMS; FIELDS; HOLE AB The zero-temperature optical properties of the t-J Hamiltonian are computed using the formalism of anyon superconductivity. Quantitative agreement is found with exact diagonalization studies. C1 INST ADV STUDY,SCH NAT SCI,PRINCETON,NJ 08540. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP TIKOFSKY, AM (reprint author), STANFORD UNIV,DEPT PHYS,STANFORD,CA 94305, USA. NR 36 TC 25 Z9 25 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 DEC 21 PY 1992 VL 69 IS 25 BP 3670 EP 3673 DI 10.1103/PhysRevLett.69.3670 PG 4 WC Physics, Multidisciplinary SC Physics GA KC931 UT WOS:A1992KC93100020 ER PT J AU WUNDERLICH, B AF WUNDERLICH, B TI NEW DIRECTIONS IN THERMAL-ANALYSIS SO THERMOCHIMICA ACTA LA English DT Article; Proceedings Paper CT 20TH CONF OF THE NORTH AMERICAN THERMAL ANALYSIS SOC : NEW DIRECTIONS IN MATERIAL CHARACTERIZATION BY THERMAL ANALYSIS CY SEP 20-26, 1991 CL MINNEAPOLIS, MN SP N AMER THERMAL ANAL SOC ID HEAT-CAPACITY MEASUREMENTS; GLASS-TRANSITION; MELTING BEHAVIOR; DYNAMICS; POLYETHYLENE; POLYMERS; DSC AB Thermal analysis has been stagnant for the last few years, perhaps with the exception of computer and software developments. Some of the more radically new ideas tested in our ATHAS laboratory are the following: (1) neural net routines for the extrapolation of heat capacities beyond the limits of measurements and for the inversion of heat capacities into approximate vibrational spectra; (2) single-run heat capacity instrumentation using double difference measurements; (3) the analysis for mesophases and rigid amorphous fractions in polymeric materials which are of importance for high-tech composites; (4) the complete molecular dynamics simulation of the motion in polymer crystals to such a precision that heat capacities, and later possibly also heats of transition, can be derived. The discussed ''new directions'' indicate that much can be done to enhance the quantitative aspects of DSC so that thermal analysis will certainly become even more important in the 21st century. C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. RP WUNDERLICH, B (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA. NR 31 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0040-6031 J9 THERMOCHIM ACTA JI Thermochim. Acta PD DEC 21 PY 1992 VL 212 BP 131 EP 141 DI 10.1016/0040-6031(92)80228-O PG 11 WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical SC Thermodynamics; Chemistry GA KJ946 UT WOS:A1992KJ94600016 ER PT J AU KETO, E PROCTOR, D BALL, R ARENS, J JERNIGAN, G AF KETO, E PROCTOR, D BALL, R ARENS, J JERNIGAN, G TI THE ENVIRONMENTS OF YOUNG STARS - MIDINFRARED AND MOLECULAR LINE IMAGING SO ASTROPHYSICAL JOURNAL LA English DT Article DE H-II REGIONS; INFRARED, INTERSTELLAR CONTINUUM; ISM, INDIVIDUAL, G34.3+0.1; ISM, INDIVIDUAL, W3(OH); ISM, MOLECULES; RADIO LINES, ISM ID H2O SOURCES; HOT CORE; AMMONIA; EVOLUTION; G34.3+0.2; REGIONS; CLOUD AB Young late-type stars in massive-star-forming regions, though much fainter than their early-type neighbors, are detectable in brightened molecular line emission, IR continuum, and H2O maser emission. The stars are found deeply embedded in high-temperature, high-density gas and near newly formed massive stars. Because the time scales in massive-star-forming regions are so short, these lower mass stars must be in very early evolutionary stages relative to their much longer lifetimes. This Letter discusses new high-resolution (< 1") images of the regions W3(OH) and G34.3 + 0.1 in the mid-infrared made with the Berkeley mid-IR Array Camera and in NH3 line emission made with the VLA. The energy requirements of the H2O masers seen in faint cores in both star-forming regions suggest that both cores now contain stars (Turner & Welch 1984; Genzel et al. 1978). Our observations suggest that the stars are probably no earlier than type A and may be later if sources of energy such as accretion contribute to the luminosity. C1 LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550. UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. RP KETO, E (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808 L-59,LIVERMORE,CA 94550, USA. NR 21 TC 23 Z9 23 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 20 PY 1992 VL 401 IS 2 BP L113 EP L116 DI 10.1086/186684 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KD154 UT WOS:A1992KD15400017 ER PT J AU LUCCHIN, F MATARRESE, S MOLLERACH, S AF LUCCHIN, F MATARRESE, S MOLLERACH, S TI THE GRAVITATIONAL-WAVE CONTRIBUTION TO COSMIC MICROWAVE BACKGROUND ANISOTROPIES AND THE AMPLITUDE OF MASS FLUCTUATIONS FROM COBE RESULTS SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMIC BACKGROUND RADIATION; COSMOLOGY, OBSERVATIONS; COSMOLOGY, THEORY; EARLY UNIVERSE; GALAXIES, FORMATION ID GENERALIZED INFLATIONARY COSMOLOGIES; DENSITY-FLUCTUATIONS; RADIATION; UNIVERSE; VELOCITY; SPECTRUM AB A stochastic background of primordial gravitational waves may substantially contribute, via the Sachs-Wolfe effect, to the large-scale cosmic microwave background (CMB) anisotropies recently detected by COBE. This implies a bias in any resulting determination of the primordial amplitude of density fluctuations. We consider the constraints imposed on n < 1 ("tilted") power-law fluctuation spectra, taking into account the contribution from both scalar and tensor waves, as predicted by power-law inflation. The gravitational wave contribution to CMB anisotropies generally reduces the required rms level of mass fluctuation, thereby increasing the linear bias parameter, even in models where the spectral index is close to the Harrison-Zel'dovich value n = 1. This "gravitational wave bias" helps to reconcile the predictions of CDM models with observations on pairwise galaxy velocity dispersion on small scales. C1 UNIV PADUA,DIPARTIMENTO FIS GALILEO GALILEI,I-35131 PADUA,ITALY. NASA,FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510. RP LUCCHIN, F (reprint author), UNIV PADUA,DIPARTIMENTO ASTRON,VICOLO OSSERVAT 5,I-35122 PADUA,ITALY. NR 35 TC 75 Z9 75 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 20 PY 1992 VL 401 IS 2 BP L49 EP L52 DI 10.1086/186668 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KD154 UT WOS:A1992KD15400001 ER PT J AU MILEY, GK CHAMBERS, KC VANBREUGEL, WJM MACCHETTO, F AF MILEY, GK CHAMBERS, KC VANBREUGEL, WJM MACCHETTO, F TI HUBBLE SPACE TELESCOPE IMAGING OF DISTANT GALAXIES - 4C 41.47 AT Z = 3.8 SO ASTROPHYSICAL JOURNAL LA English DT Article DE EARLY UNIVERSE; GALAXIES, ACTIVE; GALAXIES, FORMATION; GALAXIES, STRUCTURE; RADIO CONTINUUM, GALAXIES ID RADIO GALAXIES; STAR FORMATION; REDSHIFT; ALIGNMENT AB The Hubble Space Telescope has been used to image the continuum emission from 4C 41.17 at z = 3.8, the most distant galaxy known. The galaxy was detected with good signal-to-noise ratio and was spatially resolved at the 0.1" (440 pc) HST resolution. The measured integrated flux density is in good agreement with the ground-based value (R is similar to 22). About 35% of this emission is in the form of a high brightness clumpy region extending by about 0.5" (1.7 kpc), whose morphology is remarkably similar to that of the radio components. A fainter more diffuse region of optical emission extends westward from the center of the nuclear complex for about 1.2" (5.3 kpc) out along the radio axis. The clumpiness of the optical emission and its close correspondence with the radio structure on the subkiloparsec scale is discussed in the light of current models for high-redshift galaxies. Our observations imply that the material in the center of this galaxy is clumpy on the subkiloparsec scale. If the emission is stellar, the luminosities are consistent with a mass of about 10(10) M . of stars in each less-than-or-equal-to 500 pc clump. C1 INST ASTRON,HONOLULU,HI 96822. LAWRENCE LIVERMORE NATL LAB,LAWRENCE LIVERMORE LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94459. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. RP MILEY, GK (reprint author), STERREWACHT,POSTBUS 2513,2300 RA LEIDEN,NETHERLANDS. NR 19 TC 43 Z9 43 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 20 PY 1992 VL 401 IS 2 BP L69 EP & DI 10.1086/186673 PN 2 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KD154 UT WOS:A1992KD15400006 ER PT J AU CESS, RD POTTER, GL GATES, WL MORCRETTE, JJ CORSETTI, L AF CESS, RD POTTER, GL GATES, WL MORCRETTE, JJ CORSETTI, L TI COMPARISON OF GENERAL-CIRCULATION MODELS TO EARTH RADIATION BUDGET EXPERIMENT DATA - COMPUTATION OF CLEAR-SKY FLUXES SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID CLIMATE AB The recent availability of top-of-the-atmosphere radiometric measurements from the Earth Radiation Budget Experiment provides important opportunities for testing and improving numerical climate models. What is unique about these satellite data is that they provide monthly mean clear-sky measurements. There is, however, considerable confusion as to evaluating clear-sky radiative fluxes in climate models in a manner that is consistent with the satellite data processing system. This study provides a clear-sky flux computation method that serves as an analog to the data processing procedure and so provides a model diagnostic that is consistent with the processed satellite data. C1 EUROPEAN CTR MEDIUM RANGE WEATHER FORECASTS,READING,BERKS,ENGLAND. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP CESS, RD (reprint author), SUNY STONY BROOK,INST TERR & PLANETARY ATMOSPHERES,STONY BROOK,NY 11794, USA. NR 11 TC 24 Z9 24 U1 0 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD DEC 20 PY 1992 VL 97 IS D18 BP 20421 EP 20426 PG 6 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KF923 UT WOS:A1992KF92300007 ER PT J AU PHILLIPS, TJ GATES, WL ARPE, K AF PHILLIPS, TJ GATES, WL ARPE, K TI THE EFFECTS OF SAMPLING FREQUENCY ON THE CLIMATE STATISTICS OF THE EUROPEAN CENTER FOR MEDIUM-RANGE WEATHER FORECASTS SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID GENERAL-CIRCULATION; HORIZONTAL RESOLUTION; MODEL; MASS AB The effects of sampling frequency on the first- and second-moment statistics of selected European Centre for Medium-Range Weather Forecasts (ECMWF) model variables are investigated in a simulation of ''perpetual July'' with a diurnal cycle included and with surface and atmospheric fields saved at hourly intervals. The shortest characteristic time scales (as determined by the e-folding time of lagged autocorrelation functions) are those of ground heat fluxes and temperatures, precipitation and runoff, convective processes, cloud properties, and atmospheric vertical motion, while the longest time scales are exhibited by soil temperature and moisture, surface pressure, and atmospheric specific humidity, temperature, and wind. The time scales of surface heat and momentum fluxes and of convective processes are substantially shorter over land than over oceans. An appropriate sampling frequency for each model variable is obtained by comparing the estimates of first- and second-moment statistics determined at intervals ranging from 2 to 24 hours with the ''best'' estimates obtained from hourly sampling. Relatively accurate estimation of first- and second-moment climate statistics (10% errors in means, 20% errors in variances) can be achieved by sampling a model variable at intervals that usually are longer than the bandwidth of its time series but that often are shorter than its characteristic time scale. For the surface variables, sampling at intervals that are nonintegral divisors of a 24-hour day yields relatively more accurate time-mean statistics because of a reduction in errors associated with aliasing of the diurnal cycle and higher-frequency harmonics. The superior estimates of first-moment statistics are accompanied by inferior estimates of the variance of the daily means due to the presence of systematic biases, but these probably can be avoided by defining a different measure of low-frequency variability. Estimates of the intradiurnal variance of accumulated precipitation and surface runoff also are strongly impacted by the length of the storage interval. In light of these results, several alternative strategies for storage of the EMWF model variables are recommended. C1 EUROPEAN CTR MEDIUM RANGE WEATHER FORECASTS,READING,ENGLAND. RP PHILLIPS, TJ (reprint author), LAWRENCE LIVERMORE NATL LAB,PROGRAM CLIMATE MODEL DIAGNOSIS & INTERCOMPARISON,L-264,POB 808,LIVERMORE,CA 94550, USA. NR 20 TC 4 Z9 4 U1 1 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD DEC 20 PY 1992 VL 97 IS D18 BP 20427 EP 20436 PG 10 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KF923 UT WOS:A1992KF92300008 ER PT J AU POTTER, GL SLINGO, JM MORCRETTE, JJ CORSETTI, L AF POTTER, GL SLINGO, JM MORCRETTE, JJ CORSETTI, L TI A MODELING PERSPECTIVE ON CLOUD RADIATIVE FORCING SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID GENERAL-CIRCULATION MODELS; COMMUNITY CLIMATE MODEL; BUDGET EXPERIMENT; ECMWF MODEL; FEEDBACK; SCHEME AB Radiation fields from a perpetual July integration of a T106 version of the ECMWF operational model are used to identify the most appropriate way to diagnose cloud radiative forcing in a general circulation model, for the purposes of intercomparison between models. Differences between the methods 1 and 2 of Cess and Potter (1987) and a variant method are addressed. Method 1 is shown to be the least robust of all methods, due to the potential uncertainties related to persistent cloudiness, length of the sampling period, and biases in retrieved clear sky quantities due to insufficient sampling of the diurnal cycle. Method 2 is proposed as an unambiguous way to produce consistent radiative diagnostics for intercomparing model results. The impact of the three methods on the derived sensitivities and cloud feedbacks following an imposed change in sea surface temperature is discussed. The sensitivity of the results to horizontal resolution is considered by using the diagnostics from parallel integrations with T21 version of the model. C1 UNIV READING,DEPT METEOROL,READING RG6 2AU,ENGLAND. EUROPEAN CTR MEDIUM RANGE WEATHER FORECASTS,READING RG2 9AX,BERKS,ENGLAND. RP POTTER, GL (reprint author), LAWRENCE LIVERMORE NATL LAB,PROGRAM CLIMATE MODEL DIAGNOSIS & INTERCOMPARISON,POB 808,LIVERMORE,CA 94550, USA. NR 20 TC 14 Z9 14 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD DEC 20 PY 1992 VL 97 IS D18 BP 20507 EP 20518 PG 12 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KF923 UT WOS:A1992KF92300015 ER PT J AU TIE, X KAO, CY MROZ, EJ CICERONE, RJ ALYEA, FN CUNNOLD, DM AF TIE, X KAO, CY MROZ, EJ CICERONE, RJ ALYEA, FN CUNNOLD, DM TI 3-DIMENSIONAL SIMULATIONS OF ATMOSPHERIC METHYL CHLOROFORM - EFFECT OF AN OCEAN SINK SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID CHEMICAL TRACER MODEL; TROPOSPHERIC OH; METHYLCHLOROFORM; METHANE; CH3CCL3; TRANSPORT AB A global three-dimensional chemical tracer model of the distribution and seasonal cycles of the surface concentration of CH3CCl3 is compared with surface observations from the Atmospheric Lifetime Experiment (ALE) for the years 1980-1985. Two-dimensional OH distributions calculated by a photochemical model are empirically adjusted from observed trends in the global average and the interhemispheric ratio of methyl chloroform. The effects of the recently discovered ocean sink for methyl chloroform were investigated. The model simulates the 5-year record of observations made at the five ALE sampling sites to generally within +/- 5% of the observed mean. The calculated average global lifetime of methyl chloroform is 5.7 +/- 0.3 years. The estimated global mean OH concentration is 6.5 +/- 0.4 x 10(5) Cm-3. However, the inclusion of the ocean sink does not significantly improve the simulation of the observed interhemispheric gradient of methyl chloroform. Atmospheric transport dominates the simulated CH3CCl3 seasonal cycle throughout the northern hemisphere but is less important in the southern hemisphere. C1 UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG,LA JOLLA,CA 92093. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. UNIV CALIF IRVINE,IRVINE,CA 92717. GEORGIA INST TECHNOL,ATLANTA,GA 30332. NR 25 TC 12 Z9 12 U1 1 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD DEC 20 PY 1992 VL 97 IS D18 BP 20751 EP 20769 PG 19 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KF923 UT WOS:A1992KF92300031 ER PT J AU SMITH, MG OESTERREICHER, H MALEY, MP TAYLOR, RD AF SMITH, MG OESTERREICHER, H MALEY, MP TAYLOR, RD TI INDICATIONS FOR ENHANCED FLUX PINNING BELOW MAGNETIC-ORDERING OF FE CLUSTERS IN YBA2(CU0.94FE0.06)3O6+Y SO PHYSICA C LA English DT Article ID OXIDE SUPERCONDUCTORS; THERMAL TREATMENTS; TC AB Influence of magnetic ordering of Fe clusters in two different cluster states of YBa2(CuO.94Fe0.06)3O6+y on the magnetic hysteresis (flux pinning related) is demonstrated. In the crystallographically more extended and ordered Fe cluster state, obtained by processing under reducing atmosphere and subsequent reoxygenation [N,O], magnetic order on the Fe cluster occurs near T(N) = 25 K, while T(c) = 81 K and a relatively high magnetic hysteresis, DELTAM, strongly decreases above T(N). For the conventionally air-cooled materials [O], with T(c)= 69 K, magnetic order of the more disordered clusters occurs near T(N) = 10 K and the relatively lower DELTAM again strongly decreases above T(N). Flux pinning is therefore enhanced by the onset of magnetic ordering in the Fe clusters. C1 LOS ALAMOS NATL LAB,DIV PHYS,LOS ALAMOS,NM 87545. UNIV CALIF SAN DIEGO,DEPT CHEM,LA JOLLA,CA 92093. RP SMITH, MG (reprint author), UNIV TEXAS,CTR MAT SCI & ENGN,AUSTIN,TX 78712, USA. NR 16 TC 9 Z9 9 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD DEC 20 PY 1992 VL 204 IS 1-2 BP 130 EP 134 DI 10.1016/0921-4534(92)90582-W PG 5 WC Physics, Applied SC Physics GA KF572 UT WOS:A1992KF57200018 ER PT J AU GOODWIN, TJ RADOUSKY, HB SHELTON, RN AF GOODWIN, TJ RADOUSKY, HB SHELTON, RN TI SUPERCONDUCTING, MAGNETIC, ELECTRONIC TRANSPORT, AND STRUCTURAL-PROPERTIES OF (R1.5CE0.5)SR2CU2NBO10, R = PR, ND, SM, EU SO PHYSICA C LA English DT Article AB The (R1.5Ce0.5)Sr2Cu2NbO10 system has been characterized for R = Pr, Nd, Sn , and Eu using X-ray diffraction, resistivity, and magnetization measurements. (Nd1.5Ce0.5)Sr2Cu2NbO10 has been previously reported and is confirmed to be a superconductor with T(c) near 28 K. (Sm1.5Ce0.5)Sr2Cu2NbO10 and (Eu1.5Ce0.5)Sr2Cu2NbO10 are also superconductors with T(c)s near 28 K. (Pr1.5Ce0.5)Sr2Cu2NbO10 is not superconducting and is an insulator. In addition, magnetic susceptibility data reveal two magnetic ordering transitions at 17 K and 53 K for (Pr1.5Ce0.5)Sr2Cu2NbO10. In contrast, lo such transitions are observed for R = Nd, Sm, or Eu down to 2 K. This behavior is analogous to that found for R = Pr or Cm in the RBa2Cu3O7-x system and for R = Pr in the RBa2Cu2NbO8 system. A proposal is made for the generalization of a correlation between an anomalously high Neel temperature and the lack of superconductivity in RBa2Cu3O7-x related structures. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP GOODWIN, TJ (reprint author), UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616, USA. NR 20 TC 59 Z9 59 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD DEC 20 PY 1992 VL 204 IS 1-2 BP 212 EP 224 DI 10.1016/0921-4534(92)90592-Z PG 13 WC Physics, Applied SC Physics GA KF572 UT WOS:A1992KF57200028 ER PT J AU JESSON, DE PENNYCOOK, SJ BARIBEAU, JM HOUGHTON, DC AF JESSON, DE PENNYCOOK, SJ BARIBEAU, JM HOUGHTON, DC TI ATOMISTIC PROCESSES OF SURFACE SEGREGATION DURING SI-GE MBE GROWTH SO THIN SOLID FILMS LA English DT Article; Proceedings Paper CT SYMP ON SIGE BASED TECHNOLOGIES, AT THE 1992 SPRING CONF OF THE EUROPEAN MATERIALS RESEARCH SOC CY JUN 02-04, 1992 CL STRASBOURG, FRANCE SP EUROPEAN MAT RES SOC ID TUNNELING MICROSCOPY; ORDER; CRYSTALS AB Atomic-scale segregation at step edges during growth is proposed as the origin of ordering in the Si-Ge system. Cross-sectional Z-contrast imaging of as-grown structures reveals that a variety of ordered phase variants can exist at Si on Ge interfaces as a result of vertical segregation during superlattice growth. Long-range ordering in alloys is predicted to arise due to segregation at monolayer or bilayer steps depending on the evolving surface morphology. C1 NATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADA. RP JESSON, DE (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831, USA. OI Jesson, David/0000-0003-0897-1445 NR 17 TC 13 Z9 13 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0040-6090 J9 THIN SOLID FILMS JI Thin Solid Films PD DEC 20 PY 1992 VL 222 IS 1-2 BP 98 EP 103 DI 10.1016/0040-6090(92)90046-E PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA KH338 UT WOS:A1992KH33800022 ER PT J AU SANDLER, P LIFSHITZ, C KLOTS, CE AF SANDLER, P LIFSHITZ, C KLOTS, CE TI KINETICS OF DISSOCIATION AND THERMIONIC EMISSION IN THE C(60)-MOLECULE AND C(70)-MOLECULE SO CHEMICAL PHYSICS LETTERS LA English DT Article ID CARBON CLUSTER IONS; ENERGY RELEASE DISTRIBUTIONS; UNIMOLECULAR DECAY; COVALENT CLUSTERS; GAS-PHASE; BUCKMINSTERFULLERENE; EVAPORATION; C60; REACTIVITY; IONIZATION AB Kinetic energy release distributions are reported for the emission of C2 from the positive ions of C60 and C70. These are transformed into Arrhenius activation energies for dissociation of the neutral molecules. Microcanonical rate constants for dissociation and thermionic electron emission from these molecules are then presented. It is concluded that the latter process is parasitic to dissociation in each case. C1 OAK RIDGE NATL LAB,CHEM PHYS SECT,OAK RIDGE,TN 37831. HEBREW UNIV JERUSALEM,DEPT PHYS CHEM,IL-91904 JERUSALEM,ISRAEL. HEBREW UNIV JERUSALEM,FRITZ HABER RES CTR MOLEC DYNAM,IL-91904 JERUSALEM,ISRAEL. NR 35 TC 99 Z9 99 U1 0 U2 2 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 DEC 18 PY 1992 VL 200 IS 5 BP 445 EP 450 DI 10.1016/0009-2614(92)80073-K PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KC216 UT WOS:A1992KC21600003 ER PT J AU KIMURA, M AF KIMURA, M TI CORRELATION BETWEEN THE CARBON K-SHELL X-RAY-EMISSION RATES IN MOLECULES AND THEIR PI-BOND ORDER SO CHEMICAL PHYSICS LETTERS LA English DT Article ID SPECTRA AB For the first time, a clear correlation is shown between carbon K-shell X-ray emission rates from molecules that contain carbon (C) atoms and their pi bond orders. This correlation is based on the present calculation for C2H2, C2H4, and C2H6 and previous calculations of Larkins for CO, CO2, HCN, and CH3OH. Because the pi bond order has an inverse linear relationship with the bond length, the C K-shell X-ray emission rate correlates with the bond length as well. Some rationale for the findings based on electronegativity and charge distribution, is given, The correlation manifests itself in a chemical effect on the C K-shell X-ray emission rate. C1 RICE UNIV,DEPT PHYS,HOUSTON,TX 77251. RP KIMURA, M (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 9 TC 3 Z9 3 U1 0 U2 0 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 DEC 18 PY 1992 VL 200 IS 5 BP 524 EP 526 DI 10.1016/0009-2614(92)80085-P PG 3 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KC216 UT WOS:A1992KC21600015 ER PT J AU LOVICH, JE HERMAN, DW FAHEY, KM AF LOVICH, JE HERMAN, DW FAHEY, KM TI SEASONAL ACTIVITY AND MOVEMENTS OF BOG TURTLES (CLEMMYS-MUHLENBERGII) IN NORTH-CAROLINA SO COPEIA LA English DT Note ID PSEUDEMYS-SCRIPTA; POPULATIONS C1 SAVANNAH RIVER ECOL LAB, AIKEN, SC 29801 USA. ZOO ATLANTA, DEPT HERPETOL, ATLANTA, GA 30315 USA. BRENAU COLL, GAINESVILLE, GA 30501 USA. NR 19 TC 17 Z9 17 U1 0 U2 9 PU AMER SOC ICHTHYOLOGISTS & HERPETOLOGISTS PI MIAMI PA MAUREEN DONNELLY, SECRETARY FLORIDA INT UNIV BIOLOGICAL SCIENCES, 11200 SW 8TH STREET, MIAMI, FL 33199 USA SN 0045-8511 EI 1938-5110 J9 COPEIA JI Copeia PD DEC 18 PY 1992 IS 4 BP 1107 EP 1111 DI 10.2307/1446649 PG 5 WC Zoology SC Zoology GA KD957 UT WOS:A1992KD95700027 ER PT J AU MAZUR, P COLE, KW HALL, JW SCHREUDERS, PD MAHOWALD, AP AF MAZUR, P COLE, KW HALL, JW SCHREUDERS, PD MAHOWALD, AP TI CRYOBIOLOGICAL PRESERVATION OF DROSOPHILA EMBRYOS SO SCIENCE LA English DT Article ID MOUSE EMBRYOS; MELANOGASTER EMBRYOS; SURVIVAL; PERMEABILIZATION; FROZEN; EGGS AB The inability to cryobiologically preserve the fruit fly Drosophila melanogaster has required that fly stocks be maintained by frequent transfer of adults. This method is costly in terms of time and can lead to loss of stocks. Traditional slow freezing methods do not succeed because the embryos are highly sensitive to chilling. With the procedures described here, 68 percent of precisely staged 15-hour Oregon R (wild-type) embryos hatch after vitrification at -205-degrees-C, and 40 percent of the resulting larvae develop into normal adult flies. These embryos are among the most complex organisms successfully preserved by cryobiology. C1 UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. UNIV CHICAGO,DEPT MOLEC GENET & CELL BIOL,CHICAGO,IL 60637. RP MAZUR, P (reprint author), UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,DIV BIOL,OAK RIDGE,TN 37831, USA. FU NICHD NIH HHS [HD17607] NR 25 TC 123 Z9 133 U1 0 U2 8 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD DEC 18 PY 1992 VL 258 IS 5090 BP 1932 EP 1935 DI 10.1126/science.1470915 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KD088 UT WOS:A1992KD08800030 PM 1470915 ER PT J AU LAWN, RM WADE, DP HAMMER, RE CHIESA, G VERSTUYFT, JG RUBIN, EM AF LAWN, RM WADE, DP HAMMER, RE CHIESA, G VERSTUYFT, JG RUBIN, EM TI ATHEROGENESIS IN TRANSGENIC MICE EXPRESSING HUMAN APOLIPOPROTEIN(A) SO NATURE LA English DT Article ID LOW-DENSITY-LIPOPROTEIN; ATHEROSCLEROSIS SUSCEPTIBILITY; PLASMINOGEN ACTIVATION; HUMAN AORTA; QUANTIFICATION; LESIONS; FIBRIN; ACCUMULATION; MACROPHAGES; INHIBITION AB ELEVATED plasma levels of the lipoprotein Lp(a) are associated with increased risk for atherosclerosis and its manifestations, myocardial infarction, stroke and restenosis (for reviews, see refs 1-3). Lp(a) differs from low-density lipoprotein by the addition of the glycoprotein apolipoprotein(a), a homologue of plasminogen that contains many tandemly repeated units which resemble the fourth kringle domain of plasminogen, and single homologues of its kringle-5 and protease domain4. As plasma Lp(a) concentration is strongly influenced by heritable factors and is refractory to most drug and dietary manipulation, the effects of modulating it are difficult to mimic experimentally. In addition, the absence of apolipoprotein(a) from virtually all species other than primates precludes the use of convenient animal models. Here we show that transgenic mice expressing human apolipoprotein(a) are more susceptible than control mice to the development of lipid-staining lesions in the aorta, and that apolipoprotein(a) co-localizes with lipid deposition in the artery walls. C1 UNIV TEXAS,SW MED SCH,HOWARD HUGHES MED INST,DALLAS,TX 75235. LAWRENCE BERKELEY LAB,DIV CELL & MOLEC BIOL,BERKELEY,CA 94720. UNIV TEXAS,SW MED SCH,DEPT MOLEC GENET,DALLAS,TX 75235. RP LAWN, RM (reprint author), STANFORD UNIV,MED CTR,SCH MED,DEPT CARDIOVASC MED,STANFORD,CA 94305, USA. RI Chiesa, Giulia/G-8987-2012 OI Chiesa, Giulia/0000-0001-5553-1210 NR 30 TC 252 Z9 253 U1 0 U2 5 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD DEC 17 PY 1992 VL 360 IS 6405 BP 670 EP 672 DI 10.1038/360670a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KD082 UT WOS:A1992KD08200054 PM 1465128 ER PT J AU MARCHRUSSELL, J AF MARCHRUSSELL, J TI ON THE POSSIBILITY OF 2ND-ORDER PHASE-TRANSITIONS IN SPONTANEOUSLY BROKEN GAUGE-THEORIES SO PHYSICS LETTERS B LA English DT Article ID SMECTIC-A TRANSITION; LIQUID-CRYSTALS; BARYON-NUMBER; 2 DIMENSIONS; MODEL; OCTYLOXYCYANOBIPHENYL; SUPERCONDUCTORS; FERROMAGNETS; EXPONENTS; UNIVERSE AB In the "Type-II" regime, m(Higgs) greater-than-or-similar-to m(gauge), the finite-temperature phase transition in spontaneously-broken gauge theories (including the standard model) must be studied using are normalization group treatment. Previous studies with in the (4-epsilon)-expansion suggest a 1st-order transition in this regime. We use analogies with experimentally accessible phase transitions in liquid crystals, and theoretical investigations of superconductor phase transitions to argue that, in this range, the critical behavior of a large class of gauge-Higgs-fermion systems changes from 1st- to 2nd-order as a function of Higgs mass. We identify a set of models which, within the (2+epsilon)-expansion, possess fixed points that can describe this 2nd-order behavior. A definitive demonstration that the claimed critical behavior occurs (and a reliable estimate of m(Higgs) at the tricritical point) will probably require numerical simulations. C1 LAWRENCE BERKELEY LAB, DIV PHYS, THEORET PHYS GRP, BERKELEY, CA 94720 USA. RP PRINCETON UNIV, JOSEPH HENRY LABS, PRINCETON, NJ 08544 USA. NR 35 TC 42 Z9 42 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD DEC 17 PY 1992 VL 296 IS 3-4 BP 364 EP 370 DI 10.1016/0370-2693(92)91333-5 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KD012 UT WOS:A1992KD01200014 ER PT J AU SMITH, DP BARALT, E MORALES, B OLMSTEAD, MM MAESTRE, MF FISH, RH AF SMITH, DP BARALT, E MORALES, B OLMSTEAD, MM MAESTRE, MF FISH, RH TI BIOORGANOMETALLIC CHEMISTRY .1. SYNTHETIC AND STRUCTURAL STUDIES IN THE REACTIONS OF A NUCLEOBASE AND SEVERAL NUCLEOSIDES WITH A (ETA(5)-PENTAMETHYLCYCLOPENTADIENYL)RHODIUM AQUA COMPLEX SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID HETEROAROMATIC NITROGEN LIGANDS; AQUEOUS COORDINATION CHEMISTRY; METALLOCENE ANTITUMOR AGENTS; INTRASTRAND CROSS-LINKING; CRYSTAL-STRUCTURE; NMR EVIDENCE; DNA; 5'-TRIPHOSPHATES; MONOPHOSPHATES; 5'-NUCLEOTIDE C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF DAVIS,DEPT CHEM,DAVIS,CA 95616. NR 35 TC 121 Z9 121 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD DEC 16 PY 1992 VL 114 IS 26 BP 10647 EP 10649 DI 10.1021/ja00052a077 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA KD717 UT WOS:A1992KD71700077 ER PT J AU WEIDNER, N FOLKMAN, J POZZA, F BEVILACQUA, P ALLRED, EN MOORE, DH MELI, S GASPARINI, G AF WEIDNER, N FOLKMAN, J POZZA, F BEVILACQUA, P ALLRED, EN MOORE, DH MELI, S GASPARINI, G TI TUMOR ANGIOGENESIS - A NEW SIGNIFICANT AND INDEPENDENT PROGNOSTIC INDICATOR IN EARLY-STAGE BREAST-CARCINOMA SO JOURNAL OF THE NATIONAL CANCER INSTITUTE LA English DT Article ID GROWTH-FACTOR RECEPTOR; CANCER; CELLS; NEOVASCULARIZATION; METASTASIS; ANTIBODIES; EXPRESSION; FRACTION; PROTEIN; VESSELS AB Background: Axillary lymph node status has been the most important prognostic factor in operable breast carcinoma, but it does not fully account for the varied disease outcome. More accurate prognostic indicators would help in selection of patients at high risk for disease recurrence and death who are candidates for systemic adjuvant therapy. Our recent findings indicated that microvessel density (count or grade) in invasive breast carcinoma (a measure of tumor angiogenesis) is associated with metastasis and thus may be a prognostic indicator. Purpose: This study was designed to further define the relationship of microvessel density with overall and relapse-free survival and with other reported prognostic indicators in breast carcinoma. Methods: In a prospective, blinded study of 165 consecutive patients, the microvessels within primary invasive breast carcinoma were highlighted by immunocytochemical staining to detect factor VIII-related antigen. Using light microscopy, we counted microvessels per 200X field in the most active areas of neovascularization and graded microvessel density. These findings were correlated, by univariate and multivariate analyses, with overall and relapse-free survival, axillary node status, and other prognostic indicators (median follow-up, 51 months). Results: There was a highly significant (P less-than-or-equal-to .001) association of microvessel density with overall survival and relapse-free survival in all patients, including node-negative and node-positive subsets. All patients with breast carcinomas having more than 100 microvessels per 200X field experienced tumor recurrence within 33 months of diagnosis, compared with less than 5% of the patients with breast carcinoma having 33 or fewer micro-vessels per 200X field. Moreover, microvessel density was the only statistically significant predictor of overall survival among node-negative women (P<.001). Only microvessel density (P<.001) and histologic grade (P = .04) showed statistically significant correlations with relapse-free survival in the node-negative subset. Conclusions: Micro-vessel density in the area of the most intense neovascularization in invasive breast carcinoma is an independent and highly significant prognostic indicator for overall and relapse-free survival in patients with early-stage breast carcinoma (I or II by International Union Against Cancer criteria). Implications: Such an indicator would be useful in selection of those node-negative patients with breast carcinoma who are at high risk for having occult metastasis at presentation. These patients could then be given systemic adjuvant therapy. C1 ST BORTOLO REG HOSP,DEPT ONCOL & RADIOTHERAPY,I-36100 VICENZA,ITALY. UNIV CALIF SAN FRANCISCO,DEPT PATHOL,SAN FRANCISCO,CA 94143. HARVARD UNIV,CHILDRENS HOSP,SCH MED,DEPT SURG,BOSTON,MA 02115. HARVARD UNIV,CHILDRENS HOSP,SCH MED,DEPT ANAT & CELLULAR BIOL,BOSTON,MA 02115. STAT & DATA BASE CONSULTING,BOSTON,MA. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. HAMMERSMITH HOSP,IMPERIAL CANC RES FUND,MOLEC ONCOL LAB,LONDON W12 0HS,ENGLAND. FU NCI NIH HHS [CA-701182] NR 63 TC 1476 Z9 1759 U1 7 U2 38 PU NATL CANCER INSTITUTE PI BETHESDA PA 9030 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0027-8874 J9 J NATL CANCER I JI J. Natl. Cancer Inst. PD DEC 16 PY 1992 VL 84 IS 24 BP 1875 EP 1887 DI 10.1093/jnci/84.24.1875 PG 13 WC Oncology SC Oncology GA KB984 UT WOS:A1992KB98400011 PM 1281237 ER PT J AU RAY, FA MEYNE, J KRAEMER, PM AF RAY, FA MEYNE, J KRAEMER, PM TI SV40 T-ANTIGEN INDUCED CHROMOSOMAL CHANGES REFLECT A PROCESS THAT IS BOTH CLASTOGENIC AND ANEUPLOIDOGENIC AND IS ONGOING THROUGHOUT NEOPLASTIC PROGRESSION OF HUMAN FIBROBLASTS SO MUTATION RESEARCH LA English DT Article DE SV40 T-ANTIGEN; CHROMOSOME ABERRATIONS; ANEUPLOIDY; HUMAN DIPLOID FIBROBLASTS; TRANSFORMATION; IMMORTALIZATION; TUMORIGENICITY; CHROMOSOME MUTATION ID HUMAN-DIPLOID FIBROBLASTS; CHINESE-HAMSTER CELLS; SIMIAN VIRUS-40; MONOCLONAL-ANTIBODIES; DNA; TRANSFORMATION; IMMORTALIZATION; RETINOBLASTOMA; EXPRESSION; EVOLUTION AB In human fibroblasts, the expression of SV40 large T antigen is known to cause a variety of chromosomal aberrations and especially dicentric chromosomes. In some cases, the later aberrations have been reported to be reversible telomeric associations. We report here aberration and chromosome number studies of twenty-nine T antigen positive lineages, studied from their initiation by transfection of T antigen sequences into human diploid fibroblasts, until crisis or immortalization occurred or, in some cases until the lines became tumorigenic in nude mice. The data show that T antigen consistently produced chromosomal instability of both number and structure hy an active process that began before transformation indicators were positive and continued throughout neoplastic progression. The most frequently observed aberrations were dicentric chromosomes, which were shown to be true dicentrics by examination by in situ hybridization with telomeric sequences These data are consistent with the hypothesis that T antigen causes human fibroblasts to become neoplastically transformed by successive rounds of chromosomal mutation and lineage evolution. C1 LOS ALAMOS NATL LAB,DIV LIFE SCI,MS M888,LOS ALAMOS,NM 87545. NR 34 TC 51 Z9 53 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-8262 J9 MUTAT RES PD DEC 16 PY 1992 VL 284 IS 2 BP 265 EP 273 DI 10.1016/0027-5107(92)90011-P PG 9 WC Genetics & Heredity; Toxicology SC Genetics & Heredity; Toxicology GA KC055 UT WOS:A1992KC05500009 PM 1281278 ER PT J AU CHEN, J DANIELS, LM ANGELICI, RJ AF CHEN, J DANIELS, LM ANGELICI, RJ TI STRUCTURE OF A RING-OPENED 2,5-DIMETHYLTHIOPHENE COMPLEX, (ETA-5-C5ME5)IR(CO)(C,S-ME2C4H2S) SO ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS LA English DT Article ID CP-STAR-IR(2,5-DIMETHYLTHIOPHENE) AB Carbonyl(2,4-hexadiene-2-thiolato)(eta5-pentamethylcyclopentadienyl)iridium, [Ir(C6H8S)-(C10H15)(CO)], M(r) = 467.6, triclinic, P1BAR, a = 13.694 (4), b = 16.519 (5), c = 7.740 (2) angstrom, alpha = 102.51 (2), beta = 103.43 (2), gamma = 81.10 (2)-degrees, V = 1652.5 (8) angstrom3, Z = 4, D(x) = 1.880 g cm-3, Mo Kalpha, lambda = 0.71073 angstrom, mu = 81.64 cm-1, F(000) = 904, T= 203 K, R = 0.0362 (wR = 0.0470), 5822 unique reflections, 3843 with F(o)2 > 3sigma(\F(o)\2). In addition to the eta5-pentamethylcyclopentadienyl and CO ligands, the structure contains a non-planar six-membered ring made up of iridium, and the four C atoms and one S atom of the thiophene. The alternating short-long-short [1.33 (2), 1.48 (2), 1.34 (2) angstrom] pattern of the C-C bond distances indicates that the four-carbon section of the ring is a diene system. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP CHEN, J (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011, USA. NR 3 TC 10 Z9 10 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-2701 J9 ACTA CRYSTALLOGR C JI Acta Crystallogr. Sect. C-Cryst. Struct. Commun. PD DEC 15 PY 1992 VL 48 BP 2120 EP 2122 DI 10.1107/S0108270192003895 PN 12 PG 3 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA KF296 UT WOS:A1992KF29600007 ER PT J AU SMITH, PH RYAN, RR AF SMITH, PH RYAN, RR TI STRUCTURE OF A GADOLINIUM HEXAAZA MACROCYCLE COMPLEX WITH A GD2(OAC)8 COUNTERION SO ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS LA English DT Article ID CRYSTAL-STRUCTURE; MOLECULAR-STRUCTURE AB Di[bis(acetato-O,O'){2,7,13,18-tetramethyl-3,6,14,17,23,24-hexaazatricyclo[17.3.1.1 (8,12)]tetracosa-1(23),2,6,8,10,12(24),13,17,19,21 -decaene-N,N',N '',-N''',N'''',N'''''}gadolinium(III)] bis[(mu-acetato-O:O,-O')-(mu-acetato-O:O')-bis(acetato-O,O')-gadolinium(III)] chloroform benzene solvate, 2[Gd(C22H26N6)-(C2H3O2)2][Gd2(C2H3O2)8].C6H6.4CHCl3, M(r) = 2642.1, triclinic, P1BAR, a = 12.488 (2), b = 14.198 (3), c = = 16.848 (3) angstrom, alpha = 66.65 (3), beta = 69.65 (3), gamma = 86.66 (3)-degrees, V = 2560.4 (8) angstrom3, Z = 1, D(x) = 1.714 Mg m-3, mu = 2.96 mm-1, lambda(Mo Kalpha) = 0. 71069 angstrom, F(000) = 1302, T = 298 K, R = 0.04 1, wR = 0.037 for 3956 observed reflections. The structure consists of two inversion-related monocationic bis(acetato) gadolinium macrocycle complexes and a centrosymmetric dianionic gadolinium acetate dimer. In the cation each Gd ion is coordinated by six N atoms from the macrocycle and two bidentate acetate anions, coordinated on opposite sides of the Gd. The dianion is composed of a centrosymmetric dimer in which each Gd is coordinated by five 0 atoms from four bridging acetates (two of which are unique) and two bidentate terminal acetates. RP SMITH, PH (reprint author), LOS ALAMOS NATL LAB,ISOTOPE & STRUCT CHEM GRP,INC-4,LOS ALAMOS,NM 87545, USA. NR 18 TC 6 Z9 6 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-2701 J9 ACTA CRYSTALLOGR C JI Acta Crystallogr. Sect. C-Cryst. Struct. Commun. PD DEC 15 PY 1992 VL 48 BP 2127 EP 2130 DI 10.1107/S0108270192003810 PN 12 PG 4 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA KF296 UT WOS:A1992KF29600010 ER PT J AU JOHNSON, DA SIEMER, DD BAUER, WF AF JOHNSON, DA SIEMER, DD BAUER, WF TI DETERMINATION OF NANOGRAM LEVELS OF BORON IN MILLIGRAM-SIZED TISSUE SAMPLES BY INDUCTIVELY COUPLED PLASMA ATOMIC EMISSION-SPECTROSCOPY SO ANALYTICA CHIMICA ACTA LA English DT Article DE ATOMIC ABSORPTION SPECTROMETRY; INDUCTIVELY COUPLED PLASMA SPECTROMETRY; BORON ID NEUTRON-CAPTURE THERAPY; BIOLOGICAL-MATERIALS; METHYL BORATE; SPECTROMETRIC DETERMINATION; B-10; GENERATION; CELLS AB This paper describes a simple modification to the sample introduction system of a standard inductively coupled plasma-atomic emission spectroscopy (ICP-AES) spectrometer that allows the determination of nanogram quantities of boron. This modification was applied to the part-per-million quantitation of boron in tissue samples in the range of 1-30 mg. Boron is converted to the volatile methoxyborate ester, which is immediately swept/aspirated into the torch with argon carrier gas. These small tissue samples are prepared by first moistening them with a drop or two of sodium hydroxide solution and then dry ashing them in small platinum crucibles. After cooling, 100 mul of concentrated sulfuric acid are weighed into these crucibles to dissolve the ash. The first step of the actual determination involves weighing aliquots of this acid into the plastic test tubes that subsequently serve as the esterification reaction vessel. A simple adaptor inserted into these tubes permits the suction generated by a standard concentric flow ICP-AES nebulizer to pull an argon carrier gas stream through the headspace volume of the tube. When methanol is added, the gaseous boron ester forms and is immediately swept into the torch. The absolute detection limit is on the order of 0.2 ng. C1 WESTINGHOUSE IDAHO NUCL CO INC,IDAHO FALLS,ID 83403. RP JOHNSON, DA (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,BNCT PROGRAM,IDAHO FALLS,ID 83415, USA. RI Bauer, William/B-8357-2016 OI Bauer, William/0000-0002-7190-9700 NR 21 TC 21 Z9 21 U1 2 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0003-2670 J9 ANAL CHIM ACTA JI Anal. Chim. Acta PD DEC 15 PY 1992 VL 270 IS 1 BP 223 EP 230 DI 10.1016/0003-2670(92)80111-J PG 8 WC Chemistry, Analytical SC Chemistry GA KF680 UT WOS:A1992KF68000025 ER PT J AU KEPLEY, LJ CROOKS, RM RICCO, AJ AF KEPLEY, LJ CROOKS, RM RICCO, AJ TI SELECTIVE SURFACE ACOUSTIC WAVE-BASED ORGANOPHOSPHONATE CHEMICAL SENSOR EMPLOYING A SELF-ASSEMBLED COMPOSITE MONOLAYER - A NEW PARADIGM FOR SENSOR DESIGN SO ANALYTICAL CHEMISTRY LA English DT Letter ID GOLD; ADSORPTION; COPPER; FILMS C1 UNIV NEW MEXICO,DEPT CHEM,ALBUQUERQUE,NM 87131. SANDIA NATL LABS,DEPT MICROSENSOR 1315,ALBUQUERQUE,NM 87185. RI Ricco, Antonio/A-5273-2010 NR 23 TC 167 Z9 173 U1 2 U2 14 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD DEC 15 PY 1992 VL 64 IS 24 BP 3191 EP 3193 DI 10.1021/ac00048a018 PG 3 WC Chemistry, Analytical SC Chemistry GA KD101 UT WOS:A1992KD10100019 ER PT J AU WAHL, JH GOODLETT, DR UDSETH, HR SMITH, RD AF WAHL, JH GOODLETT, DR UDSETH, HR SMITH, RD TI ATTOMOLE LEVEL CAPILLARY ELECTROPHORESIS MASS-SPECTROMETRIC PROTEIN-ANALYSIS USING 5-MU-M-ID CAPILLARIES SO ANALYTICAL CHEMISTRY LA English DT Letter ID ELECTROSPRAY IONIZATION INTERFACE; LASER-INDUCED FLUORESCENCE; ZONE ELECTROPHORESIS; ISOTACHOPHORESIS; PERFORMANCE; SEPARATION; PEPTIDES C1 PACIFIC NW LAB, DEPT CHEM SCI, CHEM METHODS & SEPARAT GRP, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 19 TC 110 Z9 110 U1 0 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD DEC 15 PY 1992 VL 64 IS 24 BP 3194 EP 3196 DI 10.1021/ac00048a019 PG 3 WC Chemistry, Analytical SC Chemistry GA KD101 UT WOS:A1992KD10100020 ER PT J AU SARGENT, T KUSUBOV, N TAYLOR, SE BUDINGER, TF AF SARGENT, T KUSUBOV, N TAYLOR, SE BUDINGER, TF TI TRACER KINETIC EVIDENCE FOR ABNORMAL METHYL METABOLISM IN SCHIZOPHRENIA SO BIOLOGICAL PSYCHIATRY LA English DT Article ID EPISODIC PSYCHOTIC-PATIENTS; METHIONINE ADENOSYLTRANSFERASE; RAT-LIVER; SERINE; TRANSMETHYLATION; DEMETHYLATION; SYMPTOMS; ISOZYMES; EXCESS AB The original transmethylation hypothesis of schizophrenia has evolved with time and experiment to the present concept that a defect in the methyl-carbon metabolic pathway may be causative in this illness. Various researchers have proposed that specific steps in the methyl-carbon pathway may be defective, and have presented evidence to support these possibilities. We have tested the general concept of the hypothesis by administering methionine labeled with C-11 or C-14 in the S-methyl carbon to patients with schizophrenia and to controls and measured the expiration of (CO2)-C-11 and (CO2)-C-14. We found that the rate and total expiration of labeled CO2 were three times less in the patients than in the controls, with no overlap of data points in the two groups. Specific steps in the methyl-carbon pathway that might be defective and produce the results seen here are discussed in light of this and other researchers' findings. RP SARGENT, T (reprint author), LAWRENCE BERKELEY LAB,DIV LIFE SCI,DONNER LAB,BERKELEY,CA 94720, USA. FU NIMH NIH HHS [5 RO1 MH36801-08] NR 36 TC 18 Z9 18 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0006-3223 J9 BIOL PSYCHIAT JI Biol. Psychiatry PD DEC 15 PY 1992 VL 32 IS 12 BP 1078 EP 1090 DI 10.1016/0006-3223(92)90188-6 PG 13 WC Neurosciences; Psychiatry SC Neurosciences & Neurology; Psychiatry GA KG100 UT WOS:A1992KG10000003 PM 1477188 ER PT J AU BARTH, RF SOLOWAY, AH FAIRCHILD, RG BRUGGER, RM AF BARTH, RF SOLOWAY, AH FAIRCHILD, RG BRUGGER, RM TI BORON NEUTRON-CAPTURE THERAPY FOR CANCER - REALITIES AND PROSPECTS SO CANCER LA English DT Review DE BORON NEUTRON CAPTURE THERAPY; CANCER ID RELATIVE BIOLOGICAL EFFECTIVENESS; TUMOR-ASSOCIATED ANTIGENS; MALIGNANT-MELANOMA; B-10(N,ALPHA)LI-7 REACTION; CARCINOEMBRYONIC ANTIGEN; MONOCLONAL-ANTIBODIES; LABELED ANTIBODIES; RADIATION BIOLOGY; AMINO-ACIDS; NUDE-MICE AB Boron neutron capture therapy (BNCT) is based on the nuclear reaction that occurs when a stable isotope, boron-10 (B-10), is irradiated with low-energy thermal neutrons (n(th)) to yield (He-4) alpha-particles and Li-7 nuclei (B-10 + n(th) --> [B-11] --> He-4 + Li-7 + 2.31 MeV). The success of BNCT as a tumoricidal modality is dependent on the delivery of a sufficient quantity of B-10 and n(th) to individual cancer cells to sustain a lethal B-10(n,alpha) Li-7 reaction. The current review covered the radiobiologic considerations on which BNCT is based, including a brief discussion of microdosimetry and normal tissue tolerance. The development of tumor-localizing boron compounds was discussed, including the sulfhydryl-containing polyhedral borane, sodium borocaptate (Na2B12H11SH), and boronophenylalanine (BPA), both of which are currently being used clinically in Japan as capture agents for malignant brain tumors and melanomas, respectively. Compounds currently under evaluation, such as boronated porphyrins, nucleosides, liposomes, and monoclonal antibodies (MoAbs), were also considered. Nuclear reactors have been used as the exclusive source of neutrons for BNCT. The use of low-energy (0.025 eV) thermal neutrons and higher-energy (1-10,000 eV) epithermal beams, beam optimization, and possible alternative neutron sources (accelerators) were also discussed. Clinical studies performed in the United States during the 1950s and 1960s for the treatment of malignant brain tumors were reviewed. Current studies in Japan and future studies in Europe and the United States concerning the treatment of glioblastomas and melanomas by BNCT were discussed, as were critical issues that must be addressed if BNCT is ever to be a useful therapeutic modality. C1 OHIO STATE UNIV, COLL PHARM, COLUMBUS, OH 43210 USA. BROOKHAVEN NATL LAB, DEPT MED, UPTON, NY 11973 USA. RP BARTH, RF (reprint author), OHIO STATE UNIV, DEPT PATHOL, 165 HAMILTON HALL, 1645 NEIL AVE, COLUMBUS, OH 43210 USA. FU NCI NIH HHS [R01 CA-53896] NR 120 TC 242 Z9 245 U1 1 U2 21 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0008-543X J9 CANCER-AM CANCER SOC JI Cancer PD DEC 15 PY 1992 VL 70 IS 12 BP 2995 EP 3007 PG 13 WC Oncology SC Oncology GA KB640 UT WOS:A1992KB64000040 PM 1451084 ER PT J AU COLE, DR AF COLE, DR TI INFLUENCE OF SOLUTION COMPOSITION AND PRESSURE ON THE RATES OF OXYGEN ISOTOPE EXCHANGE IN THE SYSTEM - CALCITE-H2O-NACL AT ELEVATED-TEMPERATURES SO CHEMICAL GEOLOGY LA English DT Article ID MINERAL-FLUID SYSTEMS; QUARTZ-WATER; CALCITE; FRACTIONATION; DIFFUSION; SURFACE; CARBON AB Variations in the extent of oxygen isotope exchange (F, where F = 0 at t = 0; and F = 1 at t = infinity) have been measured in the system calcite-H2O-NaCl as a function of temperature, pressure and concentration of NaCl. The conditions of these hydrothermal experiments are: T = 300-600-degrees-C, P = 1 kbar (0.25 kbar at 300-degrees-C; and 0.55, 1 and 2 kbar at 500-degrees-C only), m NaCl = 0, 0.1, 0.3, 1 and 4, W/S mass (moles) ratio approximately 4, and run time = 211-1956 hr. There is a pronounced increase in the F-values with increasing temperature, salinity, pressure (500-degrees-C example only), and degree of grain rounding and regrowth. The rate of change in F is initially steep but tends to flatten out with increasing NaCl at greater-than-or-similar-to 1 m. This greater degree of recrystallization is probably related to the enhanced solubility of calcite in the presence of NaCl(aq). Data at 500-degrees-C exhibit a trend of increasing F with increasing pressure. Rate constants (log r(f) in mol m-2 s-1 O) calculated from these data range from a maximum value of -6.75 at 600-degrees-C, 1 kbar, 4 m NaCl to a minimum rate of -9.46 at 300-degrees-C, 0.25 kbar, 0 m NaCl. Activation energies were calculated for each NaCl concentration at 1 kbar and vary as 15, 16, 19, 20 and 19 kcal mol-1 for 0, 0.1, 0.3, 1 and 4 m NaCl, respectively. Volumes of activation (DELTAV(double dagger)) estimated from the 500-degrees-C pressure data range from -40 to -9 cm3 mol-1 for 0 and 4 m NaCl, respectively. These data suggest that solvation of ions in solution during the activation step is the dominate process influenced by pressure. Model calculations indicate that isotopic equilibration times are very rapid, on the order of 10's to 100's of years at high temperature (> 500-degrees-C), high salinity (> 1 m) and high pressure ( > 1 kbar), depending on the W/S ratio and initial grain size. RP COLE, DR (reprint author), OAK RIDGE NATL LAB,DIV CHEM,GEOCHEM GRP,POB 2008,OAK RIDGE,TN 37831, USA. NR 47 TC 10 Z9 10 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2541 J9 CHEM GEOL JI Chem. Geol. PD DEC 15 PY 1992 VL 102 IS 1-4 BP 199 EP 216 DI 10.1016/0009-2541(92)90156-Y PG 18 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KE945 UT WOS:A1992KE94500014 ER PT J AU CORNELISSEN, JP HAASNOOT, JG REEDIJK, J FAULMANN, C LEGROS, JP CASSOUX, P NIGREY, PJ AF CORNELISSEN, JP HAASNOOT, JG REEDIJK, J FAULMANN, C LEGROS, JP CASSOUX, P NIGREY, PJ TI CRYSTAL-STRUCTURES AND ELECTROCHEMICAL PROPERTIES OF 2 PHASES OF TETRABUTYLAMMONIUM BIS(1,3-DITHIOLE-2-THIONE-4,5-DISELENOLATO)-NICKELATE(III) SO INORGANICA CHIMICA ACTA LA English DT Article ID COORDINATION CHEMISTRY; MOLECULAR-METALS; ANION COMPLEXES; 1,3-DITHIOLE-2-THIONE-4,5-DITHIOLATE; SUPERCONDUCTORS; CONDUCTIVITY; DMIT AB The crystal structures of two phases (alpha and beta) of [Bu4N]2[Ni(dSit)2]2 are reported (dsit = 1,3-dithiole-2-thione-4,5-selenolate). The compound crystallises either in blocks (alpha-phase) or needles (beta-phase). The alpha-phase crystallises in the triclinic space group P1BAR, with a = 12.381(3),b = 14.009(2), c = 9.571(1) angstrom, alpha = 94.43(1),beta = 99.61(2), gamma = 81.32(2)-degrees and Z = 1 with the asymmetric unit having the formula Ni2C44H72N2S12Se8. The beta-phase crystallises in the triclinic space group P1BAR, with a = 11.820(1), b = 14.998(1), c = 9.517(1) angstrom, alpha = 96.980(8), beta = 100.251(9), gamma = 76.926(8)-degrees and Z = 1 with the asymmetric unit having the formula Ni2C44H72N2S12Se8. The structures were solved by direct methods, and refined by Fourier and least-squares techniques. Both crystal structures differ only marginally. They consist of anionic dimers made up of two chemically bound Ni(dsit), units. The Ni atom is square pyramidally coordinated by five selenium donor atoms, with the apically bridging Ni-Se distances (2.48 and 2.47 angstrom for alpha-[Bu4N]2[Ni(dsit)2]2 and beta[Bu4N]2[Ni(dsit)2]2, respectively) being significantly longer than the equatorial distances (2.316-2.347 angstrom). In the beta-phase one of the thionyl groups and three of the four butyl chains of the cations are in disorder. Because of the bulky nature of the cations, no short interdimer contacts are present in the lattices. Cyclic voltammetry studies of [Bu4N]2[Ni(dsit)2]2 in acetone show a first reversible 2[Ni(dsit)2]- half arrow right over half arrow left[Ni(dSit)2]2(2-) couple at E1/2= -0.12 V (versus Ag/AgCl), and a second quasi-reversible couple involving a single anodic peak at 0.18 V and two reduction peaks at 0.08 and -0.01 V. C1 LEIDEN UNIV,GORLAEUS LABS,DEPT CHEM,POB 9502,2300 RA LEIDEN,NETHERLANDS. UNIV PAUL SABATIER,CNRS,CHIM COORDINAT LAB,F-31077 TOULOUSE,FRANCE. SANDIA NATL LABS,DEPT 6642,ALBUQUERQUE,NM 87185. RI Reedijk, Jan/F-1992-2010 OI Reedijk, Jan/0000-0002-6739-8514 NR 33 TC 24 Z9 24 U1 0 U2 5 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0020-1693 J9 INORG CHIM ACTA JI Inorg. Chim. Acta PD DEC 15 PY 1992 VL 202 IS 2 BP 131 EP 139 DI 10.1016/S0020-1693(00)86828-0 PG 9 WC Chemistry, Inorganic & Nuclear SC Chemistry GA KD571 UT WOS:A1992KD57100004 ER PT J AU TAKASUKA, E ASAI, K FUJITA, K CHISHOLM, MF PENNYCOOK, SJ AF TAKASUKA, E ASAI, K FUJITA, K CHISHOLM, MF PENNYCOOK, SJ TI HIGH-RESOLUTION Z-CONTRAST OBSERVATION OF GAAS/SI HETEROINTERFACES THROUGH SCANNING-TRANSMISSION ELECTRON-MICROSCOPE SO JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS LA English DT Article DE SCANNING TRANSMISSION ELECTRON MICROSCOPE; Z-CONTRAST; GAAS/SI; HETEROEPITAXY; MISFIT DISLOCATION; MOLECULAR BEAM EPITAXY ID MISFIT DISLOCATIONS; SUPERLATTICES; SI AB Interfaces of GaAs/Si(100) grown by molecular beam epitaxy were observed through high resolution Z-contrast imaging in a scanning transmission electron microscope. Such images can be interpreted directly, and provide atomic-scale structural and compositional information. Regions of the interface were observed to be faceted on a fine scale with microtwins often threading from these regions into the film. Low-temperature grown buffer layers were found to be very effective for the suppression of defects grown in the epitaxial layer, even in the presence of the interfacial roughness. This suggests that the threading defects are due to the initial three dimensional growth mode and also due to substrate surface contamination. Interfacial misfit dislocations are clearly found to be located in the GaAs film about 5 angstrom from the interface. The incoherent images combined with compositional contrast provides much improved atomic-scale characterizations of the hetero-structure. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP TAKASUKA, E (reprint author), SUMITOMO MET IND LTD,1-8 FUSO CHO,AMAGASAKI,HYOGO 660,JAPAN. NR 11 TC 1 Z9 1 U1 0 U2 0 PU JAPAN J APPLIED PHYSICS PI MINATO-KU TOKYO PA DAINI TOYOKAIJI BLDG 24-8 SHINBASHI 4-CHOME, MINATO-KU TOKYO 105, JAPAN SN 0021-4922 J9 JPN J APPL PHYS 2 JI Jpn. J. Appl. Phys. Part 2 - Lett. PD DEC 15 PY 1992 VL 31 IS 12B BP L1788 EP L1790 PG 3 WC Physics, Applied SC Physics GA KE552 UT WOS:A1992KE55200019 ER PT J AU WINKER, S AF WINKER, S TI ABSORPTION AND IDEMPOTENCY CRITERIA FOR A PROBLEM IN NEAR-BOOLEAN ALGEBRAS SO JOURNAL OF ALGEBRA LA English DT Article RP WINKER, S (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. NR 4 TC 9 Z9 9 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-8693 J9 J ALGEBRA JI J. Algebra PD DEC 15 PY 1992 VL 153 IS 2 BP 414 EP 423 DI 10.1016/0021-8693(92)90162-F PG 10 WC Mathematics SC Mathematics GA KH423 UT WOS:A1992KH42300007 ER PT J AU RAGAN, DD GUSTAVSEN, R SCHIFERL, D AF RAGAN, DD GUSTAVSEN, R SCHIFERL, D TI CALIBRATION OF THE RUBY R(1) AND R(2) FLUORESCENCE SHIFTS AS A FUNCTION OF TEMPERATURE FROM 0 TO 600-K SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID PRESSURE MEASUREMENT; RAMAN-SPECTROSCOPY; R-LINES; LUMINESCENCE; SYSTEM; GAUGE; CELL; KBAR AB Recent work by Gupta and Shen [Appl. Phys Lett. 58, 583 (1991)] has shown that in a nonhydrostatic environment, the frequency of the ruby R2 line provides a reliable measure of the mean stress or pressure. When using the frequency of either the R1 or R2 line to measure pressure at nonambient temperature, it is necessary to know the temperature dependence of the line shift. Unfortunately, the shift of the R2 line with temperature has not been reported. The ruby R1 and R2 fluorescence shifts have been determined as a function of temperature from 15 to 600 K. Both can be fitted very well to the simple cubic forms R1(T) = 14 423 + 4.49 x 10(-2) T - 4.81 x 10(-4) T2 + 3.71 x 10(-7) T3 cm-1 and R2(T) = 14 452 + 3.00 x 10(-2) T - 3.88 x 10(-4) T2 + 2.55 x 10(-7) T3 cm-1. From 300 to 600 K the shifts fit well to linear functions of temperature. In addition, it is found that the R1-R2 Splitting changes by about 3 cm-1 over the 600 K temperature range. Linewidths were found to vary both with temperature and from sample to sample. RP LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. NR 27 TC 118 Z9 121 U1 5 U2 22 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 DEC 15 PY 1992 VL 72 IS 12 BP 5539 EP 5544 DI 10.1063/1.351951 PG 6 WC Physics, Applied SC Physics GA KC850 UT WOS:A1992KC85000002 ER PT J AU RICHARDSON, RW BERMAN, SM AF RICHARDSON, RW BERMAN, SM TI VARIATIONAL THEORY OF THE RADIANT EMITTANCE OF THE MERCURY ARGON DISCHARGE AND THE EFFECTS OF ISOTOPIC ENRICHMENT SO JOURNAL OF APPLIED PHYSICS LA English DT Article AB A variational theory of the radiant emittance of the mercury-argon discharge is developed and applied to an investigation of the effects of alterations of the isotopic composition of the mercury. The theory includes the effects of transport of resonance radiation, elastic and inelastic collisions, resonant exchange of excitation, diffusion of the mercury atoms, the isotope- and hyperfine-shifted structure of the resonance line, and the surfaces of the discharge on the emittance. Two sensitive parameters-the branching ratio for radiative decay of the resonance state and the rate constant for resonant exchange of excitation-are fitted to data on natural mercury. The remaining insensitive parameters are given values based on microscopic estimates. The resulting theory reproduces the experimentally observed results for mercury-196 enhanced mixtures. We predict small effects for mixtures with other isotopes enhanced. The crucial role played by resonant exchange of excitation is emphasized. C1 NYU,DEPT PHYS,NEW YORK,NY 10003. RP RICHARDSON, RW (reprint author), LAWRENCE BERKELEY LAB,DIV APPL SCI,LIGHTING SYST RES GRP,MAIL STOP 46-125,BERKELEY,CA 94720, USA. NR 17 TC 1 Z9 1 U1 1 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD DEC 15 PY 1992 VL 72 IS 12 BP 5571 EP 5578 DI 10.1063/1.351956 PG 8 WC Physics, Applied SC Physics GA KC850 UT WOS:A1992KC85000007 ER PT J AU PHILLPOT, SR AF PHILLPOT, SR TI THERMOELASTIC BEHAVIOR OF GRAIN-BOUNDARY SUPERLATTICES SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID COMPOSITION-MODULATED SUPERLATTICES; EMBEDDED-ATOM-METHOD; FCC METALS; THERMAL-EXPANSION; ELASTIC ANOMALIES AB The thermal-expansion coefficients of superlattices of twist grain boundaries on the (100) plane in fcc Cu and Au are calculated using a generalization of the Gruneisen relation. A strong anisotropy in the in-plane and out-of-plane thermal-expansion coefficients is found. The thermal expansion of these superlattices is found to be determined from a complex interplay of the structural disorder arising from the interfaces with the associated zero-temperature lattice-parameter changes. The relationship between the thermal expansion and the elastic properties is explored. RP ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. RI Phillpot, Simon/J-9117-2012; OI Phillpot, Simon/0000-0002-7774-6535 NR 29 TC 6 Z9 6 U1 0 U2 2 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 DEC 15 PY 1992 VL 72 IS 12 BP 5606 EP 5615 DI 10.1063/1.351960 PG 10 WC Physics, Applied SC Physics GA KC850 UT WOS:A1992KC85000011 ER PT J AU HOMMA, H KENTJANA, M ALP, EE MOONEY, TM WITTHOFF, E TOELLNER, T AF HOMMA, H KENTJANA, M ALP, EE MOONEY, TM WITTHOFF, E TOELLNER, T TI SNO2 GRAZING-INCIDENCE ANTIREFLECTION FILMS FOR MONOCHROMATIZATION OF SYNCHROTRON RADIATION - DESIGN, PREPARATION, AND CHARACTERIZATION SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID NUCLEAR BRAGG-DIFFRACTION; DECAY AB Grazing-incidence antireflection (GIAR) films are used to suppress electronic reflectivity, while maintaining good nuclear resonant reflectivity to help monochromatize the synchrotron radiation down to the mueV level of energy resolution. Such monochromators will have superior throughput by a factor of 100-500 compared to natural linewidth of individual nuclei. (SnO2)-Sn-119 GIAR films of various thicknesses were designed and fabricated on Pd-coated quartz substrates. The performance of these films was evaluated based on the measurement of off-resonance x-ray reflectivity using MoKalpha radiation and conversion electron Mossbauer spectroscopy. A Pd film was deposited on a quartz substrate at room temperature and was subsequently annealed at 500-degrees-C in an Ar atmosphere at a substrate temperature of 200-degrees-C, SnO2 was sputtered onto the Pd by reactive sputtering in an Ar and O2 atmosphere. Employing quantitative analysis of surface and interface roughness, a series of experiments was also conducted to determine optimal sputtering conditions. C1 ARGONNE NATL LAB,DIV ADV PHOTON SOURCE,ARGONNE,IL 60439. UNIV HAMBURG,INST EXPTL PHYS 2,W-2000 HAMBURG 50,GERMANY. RP HOMMA, H (reprint author), CUNY BROOKLYN COLL,DEPT PHYS,BROOKLYN,NY 11210, USA. NR 21 TC 7 Z9 7 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD DEC 15 PY 1992 VL 72 IS 12 BP 5668 EP 5675 DI 10.1063/1.351916 PG 8 WC Physics, Applied SC Physics GA KC850 UT WOS:A1992KC85000020 ER PT J AU CHO, NH KRISHNAN, KM LUCAS, CA FARROW, RFC AF CHO, NH KRISHNAN, KM LUCAS, CA FARROW, RFC TI MICROSTRUCTURE AND MAGNETIC-ANISOTROPY OF ULTRATHIN CO/PT MULTILAYERS GROWN ON GAAS (111)OVER-BAR BY MOLECULAR-BEAM EPITAXY SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID TRANSMISSION ELECTRON-MICROSCOPY; SUPERLATTICES; MAGNETORESISTANCE; FILMS AB Multilayers of (Co3 angstrom, Pt15 angstrom)x, x = 15 or 30 repeats, with or without a 200 angstrom silver buffer layer, were grown on GaAs (111) substrates by molecular-beam epitaxy. Vibrating sample magnetometry measurements confirmed that the samples with the Ag buffer layer show strong uniaxial magnetic anisotropy perpendicular to the surface. The perpendicular anisotropy exhibited by these metallic superlattices is discussed in terms of the microstructure of the overall multilayer stack, as well as the structural characteristics of the Co interface layer. Samples grown on the Ag buffer layer show strong (111) texture with 30-40-nm-size twin-related grains. These grains, correspond to the two possible (111) stacking sequence for an fcc lattice, i.e., double positioning. However, direct growth on GaAs (111) results in randomly oriented 10-20 nm grains. All samples exhibit a repeat period of 1.83 nm in both low-angle reflectivity and high-angle THETA-2THETA x-ray scattering measurements. In addition, transverse scans through the low-angle multilayer Bragg peaks show the interfaces to be diffuse in nature indicative of considerable in-plane inhomogeneity and/or compound formation. High-resolution electron microscopy measurements of cross sections compared with image simulations confirm that the interface layer is diffuse and its stoichiometry is such that the Co occupation is less than 40%. Redistribution of Co should then extend over at least four monolayers. The nanostructure of the samples grown with the Ag buffer layer comprises an eight atomic layer repeat with the Co interface layer diffuse over four monolayers. The microstructure is strongly (111) textured with columns of twin related 30-nm-sized grains. It is suggested that the combination of interdiffusion, highly oriented but twin-related columnar growth, small grain size with a possible nanometer-scale second phase may be the key to the understanding of the perpendicular anisotropy observed in these (111) superlattices. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,NATL CTR ELECTRON MICROSCOPY,BERKELEY,CA 94720. IBM CORP,ALMADEN RES CTR,SAN JOSE,CA 95120. RP KRISHNAN, KM (reprint author), LAWRENCE BERKELEY LAB,DIV MAT SCI,NATL CTR ELECTRON MICROSCOPY,BERKELEY,CA 94720, USA. OI Lucas, Christopher/0000-0001-5743-3868 NR 24 TC 14 Z9 14 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD DEC 15 PY 1992 VL 72 IS 12 BP 5799 EP 5807 DI 10.1063/1.351934 PG 9 WC Physics, Applied SC Physics GA KC850 UT WOS:A1992KC85000039 ER PT J AU NELSON, AJ FRIGO, SP ROSENBERG, R AF NELSON, AJ FRIGO, SP ROSENBERG, R TI PHOTOEMISSION CHARACTERIZATION OF THE H2 PLASMA-ETCHED SURFACE OF CDS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CYCLOTRON RESONANCE DISCHARGES; ETCHING INDUCED DAMAGE; HYDROGEN PASSIVATION; GAAS; PHOTOLUMINESCENCE; SEMICONDUCTORS; ACCEPTORS; INGAAS; INP; ZN AB The effects of H-2 plasma exposure of CdS as a function of substrate temperature was studied by synchrotron radiation soft x-ray photoemission spectroscopy and optical emission spectroscopy. The low-power H-2 plasma was generated with a commercial electron cyclotron resonance plasma source using pure H-2 with the plasma exposure being performed at ambient temperatures of 100 and 200-degrees-C. Plasma species were identified with optical emission spectroscopy. In situ photoemission measurements were acquired after each plasma exposure in order to observe changes in the valence-band electronic structure as well as changes in the Cd 4d and S 2p core lines. The results were correlated in order to relate the plasma species and characteristics to changes in surface chemistry and electronic structure. These measurements indicate that the H-2 plasma exposure type converts the CdS surface to an n-type surface and that the magnitude of the band bending is dependent on substrate temperature during plasma exposure. C1 UNIV WISCONSIN,CTR SYNCHROTRON RADIAT,STOUGHTON,WI 53589. ARGONNE NATL LAB,ADV PHOTON SOURCE,ARGONNE,IL 60439. RP NELSON, AJ (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. RI Schaff, William/B-5839-2009; Rosenberg, Richard/K-3442-2012 NR 23 TC 2 Z9 2 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD DEC 15 PY 1992 VL 72 IS 12 BP 5881 EP 5887 DI 10.1063/1.351894 PG 7 WC Physics, Applied SC Physics GA KC850 UT WOS:A1992KC85000051 ER PT J AU NELSON, AJ NILES, DW RIOUX, D PATEL, R HOCHST, H AF NELSON, AJ NILES, DW RIOUX, D PATEL, R HOCHST, H TI SOFT-X-RAY PHOTOEMISSION INVESTIGATION ON THE EFFECT OF IN DOPING IN CDS/CUINSE2 HETEROJUNCTION FORMATION SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SEMICONDUCTOR HETEROJUNCTIONS; SCHOTTKY-BARRIER; INTERFACE STATES; SOLAR-CELLS; CUINSE2; CUGASE2; GROWTH AB Synchrotron radiation soft x-ray photoemission spectroscopy was used to investigate the development of the electronic structure at the CdS(In)/CuInSe2 heterojunction interface. In-doped CdS overlayers were deposited in steps on single-crystal n-type CuInSe2 at 250-degrees-C. Results indicate that the CdS(In) grows in registry with the substrate, initially in a two-dimensional growth mode followed by three-dimensional island growth as is corroborated by reflection high-energy electron diffraction analysis. Photoemission measurements were acquired after each growth in order to observe changes in the valence-band electronic structure. The results were used to correlate the interface chemistry with the electronic structure at these interfaces and to directly determine the CdS(In)/CuInSe2 heterojunction valence-band discontinuity and the consequent heterojunction band diagram as a function of In dopant concentration. We measured a valence-band offset DELTAE(v)=0.3 eV, independent of In doping. C1 UNIV WISCONSIN,CTR SYNCHROTRON RADIAT,STOUGHTON,WI 53589. RP NELSON, AJ (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 27 TC 0 Z9 0 U1 0 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD DEC 15 PY 1992 VL 72 IS 12 BP 5888 EP 5891 DI 10.1063/1.351895 PG 4 WC Physics, Applied SC Physics GA KC850 UT WOS:A1992KC85000052 ER PT J AU RYE, RR KNAPP, JA CHI, KM HAMPDENSMITH, MJ KODAS, TT AF RYE, RR KNAPP, JA CHI, KM HAMPDENSMITH, MJ KODAS, TT TI FORMATION OF COPPER PATTERNS ON POLY(TETRAFLUOROETHYLENE) VIA RADIATION CONTROLLED CHEMICAL ETCHING AND CHEMICAL-VAPOR DEPOSITION SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CU-TEFLON ADHESION; POLYTETRAFLUOROETHYLENE AB Patterned copper films have been deposited on poly(tetrafluoroethylene) (PTFE) in a three-step additive process. In the first step, a pattern is produced by cross linking the PTFE surface in selected areas by irradiation with either electrons or x rays at dose levels below those that are either visually or spectroscopically apparent. The pattern is then developed by wet chemical etching in the second step in which only the nonirradiated areas are appreciably etched with sodium naphthalenide. In the final step, chemical-vapor deposition using the precursor (hexafluoroacetylacetonato) Cu(I) trimethylphosphine at 200-degrees-C results in Cu deposition only on the nonirradiated areas of the surface. The Cu films are continuous with a resistivity of 4 muOMEGA cm, high purity as deter-mined by Auger electron spectroscopy and x-ray photoelectron spectroscopy, and are sufficiently adherent to survive a Scotch tape test. Patterned feature sizes as small as 35 mum can be produced. C1 UNIV NEW MEXICO,DEPT CHEM,ALBUQUERQUE,NM 87131. UNIV NEW MEXICO,DEPT CHEM ENGN,ALBUQUERQUE,NM 87131. RP RYE, RR (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 23 TC 21 Z9 21 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD DEC 15 PY 1992 VL 72 IS 12 BP 5941 EP 5947 DI 10.1063/1.351902 PG 7 WC Physics, Applied SC Physics GA KC850 UT WOS:A1992KC85000059 ER PT J AU MARTENS, JS WENDT, JR HIETALA, VM GINLEY, DS ASHBY, CIH PLUT, TA VAWTER, GA TIGGES, CP SIEGAL, MP HOU, SY PHILLIPS, JM HOHENWARTER, GKG AF MARTENS, JS WENDT, JR HIETALA, VM GINLEY, DS ASHBY, CIH PLUT, TA VAWTER, GA TIGGES, CP SIEGAL, MP HOU, SY PHILLIPS, JM HOHENWARTER, GKG TI HIGH-TEMPERATURE SUPERCONDUCTING JOSEPHSON TRANSMISSION-LINES FOR PULSE AND STEP SHARPENING SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID JUNCTIONS; FILMS AB An increasing number of high speed digital and other circuit applications require very narrow impulses or rapid pulse edge transitions. Shock wave transmission lines using series or shunt Josephson junctions are one way to generate these signals. Using two different high temperature superconducting Josephson junction processes (step-edge and electron beam defined nanobridges), such transmission lines have been constructed and tested at 77 K. Shock wave lines with approximately 60 YBaCuO nanobridges, have generated steps with fall times of about 10 ps. With step-edge junctions (with higher figures of merit but lower uniformity), step transition times have been reduced to an estimated 1 ps. C1 AT&T BELL LABS,MURRAY HILL,NJ 07974. PARKVIEW R&D,MADISON,WI 53711. UNIV WISCONSIN,DEPT ELECT & COMP ENGN,MADISON,WI 53706. RP MARTENS, JS (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 17 TC 6 Z9 6 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD DEC 15 PY 1992 VL 72 IS 12 BP 5970 EP 5974 DI 10.1063/1.351906 PG 5 WC Physics, Applied SC Physics GA KC850 UT WOS:A1992KC85000063 ER PT J AU MILLER, SL MCWHORTER, PJ AF MILLER, SL MCWHORTER, PJ TI PHYSICS OF THE FERROELECTRIC NONVOLATILE MEMORY FIELD-EFFECT TRANSISTOR SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID RETENTION AB The operation of the ferroelectric nonvolatile memory field effect transistor is theoretically examined extensively for the first time. The ferroelectric transistor device properties are derived by combining the silicon charge-sheet model of metal-oxide-semiconductor field-effect transistor device operation with Maxwell's first equation which describes the properties of the ferroelectric film. The model we present describes ferroelectric transistor I-V and C-V behavior when time-dependent voltages are applied which result in hysteresis due to ferroelectric switching. The theoretical results provide unique insight into the effects of geometrical and material parameters on the electrical properties of the transistor. These parameters include the ferroelectric spontaneous and remanent polarization, the coercive field, and dielectric layer thicknesses. We have found that the conventional concept of threshold voltage is no longer useful, and that increasing the spontaneous polarization has only a minor impact on memory operation due to reverse dipole switching of the ferroelectric layer. The application of the model to optimize design and fabrication parameters is illustrated with a virtual prototyping example. The model is also used to develop a practical testing methodology for this unique device. RP MILLER, SL (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 23 TC 275 Z9 283 U1 4 U2 65 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD DEC 15 PY 1992 VL 72 IS 12 BP 5999 EP 6010 DI 10.1063/1.351910 PG 12 WC Physics, Applied SC Physics GA KC850 UT WOS:A1992KC85000067 ER PT J AU GOLDMAN, M GRANDINETTI, PJ LLOR, A OLEJNICZAK, Z SACHLEBEN, JR ZWANZIGER, JW AF GOLDMAN, M GRANDINETTI, PJ LLOR, A OLEJNICZAK, Z SACHLEBEN, JR ZWANZIGER, JW TI THEORETICAL ASPECTS OF HIGHER-ORDER TRUNCATIONS IN SOLID-STATE NUCLEAR-MAGNETIC-RESONANCE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID HIGH-RESOLUTION NMR; ROTATING SOLIDS; STRUCTURAL INFORMATION; QUADRUPOLAR NUCLEI; SPIN-1/2 NUCLEI; BERRYS PHASE; MAGIC-ANGLE; CPMAS-NMR; SPECTRA; SPECTROSCOPY AB Recent experimental developments of high-resolution NMR in solids (for example, double rotation and dynamic-angle spinning) address the reduction of second-order line broadening effects, particularly in systems involving quadrupolar nuclei such as Na-23, O-17, Al-27, and N-14. However, some aspects of the theoretical description of these systems have not been clearly understood; in particular, the various procedures available to truncate the interactions give incompatible results. We present a general framework, based on static perturbative methods, which provides a natural procedure to derive the correct Hamiltonian for higher-order effects in irreducible tensor form. Applications of this method to coherent averaging techniques (sample motion or radio-frequency irradiation) are described and compared to previous treatments based on average Hamiltonian theory. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. INDIANA UNIV,DEPT CHEM,BLOOMINGTON,IN 47405. RP GOLDMAN, M (reprint author), CEA SACLAY,SPEC,DRECAM,DIRECT SCI MAT,F-91191 GIF SUR YVETTE,FRANCE. RI Grandinetti, Philip/F-1084-2010 OI Grandinetti, Philip/0000-0003-0102-316X NR 49 TC 79 Z9 79 U1 1 U2 16 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD DEC 15 PY 1992 VL 97 IS 12 BP 8947 EP 8960 DI 10.1063/1.463321 PG 14 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KE637 UT WOS:A1992KE63700013 ER PT J AU DATSKOS, PG CHRISTOPHOROU, LG CARTER, JG AF DATSKOS, PG CHRISTOPHOROU, LG CARTER, JG TI EFFECT OF TEMPERATURE ON THE ATTACHMENT OF SLOW (LESS-THAN-OR-EQUAL-TO-1 EV) ELECTRONS TO CH3BR SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID DISSOCIATIVE ATTACHMENT; COLLISIONS; ENERGY; DEPENDENCE; EXCITATION; MOLECULES; CH3CL; SWARM AB The electron attachment rate constant k(a)([is-an-element-of], T) for CH3Br has been measured in a buffer gas of N2 using a high pressure electron swarm apparatus, within the mean electron energy range from thermal (approximately 0.046 eV) to 0.87 eV and over the temperature range, T, 300-700 K. At room temperature, CH3Br attaches low energy electrons weakly but as T is raised from 300 to 700 K the total electron attachment cross section increases by more than 2 orders of magnitude. At T=300 K the electron attachment cross section exhibits a peak at 0.38 eV which shifts progressively to lower electron energies as Tis increased. The thermal value of k(a) is 1.08 X 10(-11) cm3 s-1 at 300 K and 3.2 8 X 10(-9) cm3 s-1 at 700 K. C1 UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. RP DATSKOS, PG (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,ATOM MOLEC & HIGH VOLTAGE PHYS GRP,OAK RIDGE,TN 37831, USA. NR 27 TC 38 Z9 38 U1 0 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD DEC 15 PY 1992 VL 97 IS 12 BP 9031 EP 9035 DI 10.1063/1.463329 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KE637 UT WOS:A1992KE63700021 ER PT J AU SCHENTER, GK MCRAE, RP GARRETT, BC AF SCHENTER, GK MCRAE, RP GARRETT, BC TI DYNAMIC SOLVENT EFFECTS ON ACTIVATED CHEMICAL-REACTIONS .1. CLASSICAL EFFECTS OF REACTION-PATH CURVATURE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID TRANSITION-STATE THEORY; ATOM TRANSFER-REACTIONS; UNIMOLECULAR REACTIONS; DISSIPATIVE SYSTEMS; COLLINEAR REACTIONS; HYDROGEN MOLECULES; PHASE REACTIONS; BOTTLENECKS; RATES; KRAMERS AB In gas phase reactions, dynamical recrossings across a phase space dividing surface induced by nonlinear reaction path curvature coupling leads to the breakdown of the fundamental dynamical approximation of classical transition state theory (TST). In the following study, we examine the nature of this breakdown for chemical reaction dynamics occurring in solution. As a model system, we consider the collinear A + BC reaction where reaction path curvature increases as the mass of B becomes small compared to the mass of A and C We use a London-Eyring-Polanyi-Sato (LEPS) potential to describe the solute interaction and model the influence of the solvent by using a generalized Langevin equation that is further represented by a system of coupled harmonic oscillators. Exact classical rate constants are compared to those obtained from conventional TST and canonical variational transition state theory (CVT) as a function of solvent friction coupling. A harmonic TST analysis at the saddle point of the full system (solute plus solvent) with an optimum dividing surface containing both solute and solvent degrees of freedom returns the Grote-Hynes expression for the rate. For the case of no solvent coupling, both TST and CVT are identical and fail to account for the dynamical recrossings induced by reaction path curvature. At intermediate couplings, CVT provides an improvement to the TST estimate and agrees with dynamical simulation results. All estimates of the rate constant approach each other asymptotically at large couplings. The results are interpreted in terms of recrossings in the extended system (solute and solvent coordinates). RP SCHENTER, GK (reprint author), PACIFIC NW LAB, MAT SCI RES CTR, RICHLAND, WA 99352 USA. RI Schenter, Gregory/I-7655-2014; Garrett, Bruce/F-8516-2011 OI Schenter, Gregory/0000-0001-5444-5484; NR 39 TC 34 Z9 34 U1 1 U2 12 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD DEC 15 PY 1992 VL 97 IS 12 BP 9116 EP 9137 DI 10.1063/1.463970 PG 22 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KE637 UT WOS:A1992KE63700031 ER PT J AU GLAUSER, WA BROWN, WR LESTER, WA BRESSANINI, D HAMMOND, BL KOSZYKOWSKI, ML AF GLAUSER, WA BROWN, WR LESTER, WA BRESSANINI, D HAMMOND, BL KOSZYKOWSKI, ML TI RANDOM-WALK APPROACH TO MAPPING NODAL REGIONS OF N-BODY WAVE-FUNCTIONS - GROUND-STATE HARTREE-FOCK WAVE-FUNCTIONS FOR LI-C SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID QUANTUM MONTE-CARLO; CHEMISTRY; MOLECULES; SYSTEMS; ATOMS AB Despite the widespread acceptance of the relevance of the nodes of one-body electronic wave functions (atomic or molecular orbitals) in determining chemical properties, relatively little is known about the corresponding nodes of many-body wave functions. As an alternative to mapping the nodal surfaces present in the ground states of many-electron systems, we have focused instead on the structural domains implied by these surfaces. In the spirit of Monte Carlo techniques, the nodal hypervolumes of a series of atomic N-body Hartree-Fock level electronic wave functions have been mapped using a random-walk simulation in 3N dimensional configuration space. The basic structural elements of the domain of atomic or molecular wave functions are identified as nodal regions (continuous volumes of the same sign) and permutational cells (identical building blocks). Our algorithm determines both the relationships among nodal regions or cells (topology) as well as the geometric properties within each structural domain. Our results indicate that ground-state Hartree-Fock wave functions generally consist of four equivalent nodal regions (two positive and two negative), each constructed from one or more permutational cells. We have developed an operational method to distinguish otherwise identical permutational cells. The limitations and most probable sources of error associated with this numerical method are discussed as are directions for future research. C1 LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. UNIV MILAN,DIPARTIMENTO CHIM FIS & ELETTROCHIM,I-20133 MILAN,ITALY. FUJITSU AMER INC,SAN JOSE,CA 95134. SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551. RP GLAUSER, WA (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. OI Brown, Willard/0000-0001-7369-6799 NR 24 TC 31 Z9 31 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD DEC 15 PY 1992 VL 97 IS 12 BP 9200 EP 9215 DI 10.1063/1.463296 PG 16 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KE637 UT WOS:A1992KE63700040 ER PT J AU RODRIGUEZ, JA HRBEK, J AF RODRIGUEZ, JA HRBEK, J TI METAL-METAL BONDING ON SURFACES - ZN-AU ON RU(001) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ELECTRONIC-STRUCTURE; INTERMETALLIC COMPOUNDS; TRANSITION-METALS; CO CHEMISORPTION; CHARGE-TRANSFER; MULTIPLE BONDS; LEVEL SHIFTS; NI FILMS; ADSORPTION; OXYGEN AB The properties of Zn. Au, and Zn-Au films on Ru(001) have been studied using thermal desorption mass spectroscopy (TDS) and core and valence level photoemission. TDS spectra show desorption of Zn from Ru(001) at 450 (multilayer), 490 (second layer), and 720 K (first layer). The monolayer of Zn desorbs following zero-order kinetics with an activation energy for desorption of 36 kcal/mol. Photoemission studies show that the Zn(3s) and Zn(3d) levels of Zn bonded to Ru are shifted 0.5 eV toward lower binding energy with respect to the corresponding levels of pure metallic Zn The direction of this binding-energy shift together with the results of CO-TDS indicate that Zn is withdrawing electrons from the Ru(001) surface. Such charge transfer is in part responsible for the large stability of the Ru-Zn bond. Au desorbs from Ru(001) at temperatures of 1175 (multilayer) and 1260 K (first layer) For a monolayer of Au deposited on Ru(001), the positions of the Au(4f) and Au(5d) levels are very close lo those of the surface atoms of Au(111), indicating that charge transfer between Au and Ru is minimal. A comparison of the desorption temperature for a monolayer of Zn or Au from Ru(001) with values previously reported for the desorption of monolayers of alkali (K and Cs), noble (Cu and Ag), and transition (Mn, Ni, and Pd) metals indicates that the strength of a metal-metal bond in a bimetallic surface depends on (1) the bulk cohesive energy of the individual metals (which gives an indication of the tendency of the element to form strong metal-metal bonds), and (2) the charge transfer within the bond. Zn and Au alloy when coadsorbed on Ru(001). Results for submonolayer coverages of Zn and Au show that the Zn-Ru and Zn-Au bonds in the trimetallic system are more stable than the corresponding bonds in Zn/Ru(001) or Zn-Au alloys. This phenomenon is probably caused by synergistic interactions in three center metal-metal bonding. The formation of ZnAu alloys induces a shift of approximately + 1.0 eV in the Au(4f) and Au(5d) levels, and -0.2 eV in the Zn(3s) and Zn(3d) levels. The shift in the core and valence levels of Au is caused by rehybridization of the Au(5d,6s,6p) levels, while the shift in the Zn levels comes from a contraction in volume. RP RODRIGUEZ, JA (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. RI Hrbek, Jan/I-1020-2013 NR 86 TC 31 Z9 31 U1 1 U2 10 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD DEC 15 PY 1992 VL 97 IS 12 BP 9427 EP 9439 DI 10.1063/1.463318 PG 13 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KE637 UT WOS:A1992KE63700063 ER PT J AU HSUEH, CH AF HSUEH, CH TI MODIFICATIONS OF FIBER PULL-OUT ANALYSIS SO JOURNAL OF MATERIALS SCIENCE LETTERS LA English DT Article ID FIBER; MATRIX; STRESS; COMPOSITES; TESTS RP HSUEH, CH (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831, USA. RI Hsueh, Chun-Hway/G-1345-2011 NR 15 TC 2 Z9 3 U1 0 U2 1 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0261-8028 J9 J MATER SCI LETT JI J. Mater. Sci. Lett. PD DEC 15 PY 1992 VL 11 IS 24 BP 1663 EP 1666 DI 10.1007/BF00736201 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA KD451 UT WOS:A1992KD45100010 ER PT J AU BASKES, MI HOAGLAND, RG NEEDLEMAN, A AF BASKES, MI HOAGLAND, RG NEEDLEMAN, A TI SUMMARY REPORT - COMPUTATIONAL ISSUES IN THE MECHANICAL-BEHAVIOR OF METALS AND INTERMETALLICS SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Review ID BRITTLE-DUCTILE TRANSITION; INDUCED ELASTIC ANOMALIES; MATERIAL RATE DEPENDENCE; TWIST GRAIN-BOUNDARIES; CRACK TIP DEFORMATION; EMBEDDED-ATOM-METHOD; SINGLE-CRYSTALS; VOID GROWTH; FINITE-ELEMENT; HYDROGEN EMBRITTLEMENT AB This report is a summary of a workshop held September 30 to October 3, 1991, in Williamsburg, VA to discuss computational issues in the mechanical behavior of metals and intermetallics. Its objective was to identify the critical research projects to be pursued if we are to make progress in the prediction of mechanical behavior of materials. C1 WASHINGTON STATE UNIV, DEPT MECH & MAT ENGN, PULLMAN, WA 99164 USA. BROWN UNIV, DIV ENGN, PROVIDENCE, RI 02912 USA. RP BASKES, MI (reprint author), SANDIA NATL LABS, MAT & PROC RES DEPT, POB 969, LIVERMORE, CA 95511 USA. RI Needleman, Alan/A-1879-2008; Hoagland, Richard/G-9821-2012 OI Needleman, Alan/0000-0002-4697-4535; NR 164 TC 15 Z9 17 U1 0 U2 6 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 EI 1873-4936 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD DEC 15 PY 1992 VL 159 IS 1 BP 1 EP 34 DI 10.1016/0921-5093(92)90395-H PG 34 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA KD584 UT WOS:A1992KD58400001 ER PT J AU HSUEH, CH AF HSUEH, CH TI INTERFACIAL DEBONDING AND FIBER PULL-OUT STRESSES OF FIBER-REINFORCED COMPOSITES .8. THE ENERGY-BASED DEBONDING CRITERION SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article ID MATRIX COMPOSITES; BOND STRENGTH; FRACTURE AB The applied stress required to initiate interfacial debonding (i.e. the initial debond stress) during fiber pull-out was analyzed using an energy-based debonding criterion. It was shown in part VII that the initial debond stress derived from the strength-based debonding criterion is sensitive to the accuracy of modeling. However, the present study shows that the initial debond stress derived from the energy-based debonding criterion is insensitive to the accuracy of modeling. The dependences of the initial debond stress on the material properties (i.e. the embedded fiber length, elastic constants and radial dimensions of the fiber and the matrix, and the interfacial properties) are also compared for these two debonding criteria. RP HSUEH, CH (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831, USA. RI Hsueh, Chun-Hway/G-1345-2011 NR 24 TC 17 Z9 17 U1 2 U2 6 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD DEC 15 PY 1992 VL 159 IS 1 BP 65 EP 72 DI 10.1016/0921-5093(92)90399-L PG 8 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA KD584 UT WOS:A1992KD58400005 ER PT J AU MOSHAMMER, H AF MOSHAMMER, H TI TRANSIENT-RESPONSE OF THE BEAM AFTER INJECTION INTO A STORAGE RING SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB The time evolution of the distribution function of a mismatched or an off-axis injected Gaussian bunch is derived from the Vlasov equation. Radiation damping as well as current dependent effects are neglected. Analytic expressions for the first and second moments of the longitudinal and transverse distributions are derived when nonlinear fields which lead to decoherence of the center of mass and to filamentation of the emittance are taken into account. Coupling between the longitudinal and the transverse planes due to chromaticity will lead to synchrotron sidebands to the betatron tune in the Fourier spectrum of the transverse center of mass motion after injection. RP MOSHAMMER, H (reprint author), SLAC,STANFORD,CA 94309, USA. NR 17 TC 8 Z9 8 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD DEC 15 PY 1992 VL 323 IS 3 BP 553 EP 568 DI 10.1016/0168-9002(92)90001-K PG 16 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KE735 UT WOS:A1992KE73500001 ER PT J AU CHAO, YC CHEN, PS AF CHAO, YC CHEN, PS TI HIGHER-ORDER EFFECTS IN BEAM BEAM DEFLECTION SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB Beam-beam deflection scan is a useful tool, both in the SLC and in future linear colliders, for extracting information about the beam position, size and luminosity. This technique poses nontrivial challenges to the instrumentation in its own right. The understanding of all aspects of beam-beam deflection, in particular that of disruption, is therefore crucial to a successful implementation of this technique. When disruption effects become strong mainly due to increased beam intensity per bunch, the simple rigid-bunch formula for beam-beam deflection is no longer valid. In this report we discuss the general modification to the rigid beam-beam deflection formula in the presence of disruption using various methods including analytical calculation, rigid and semi-rigid two-disk models, and simulation. The impact on the realistic beam-beam deflection in the SLC is also discussed. RP CHAO, YC (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305, USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD DEC 15 PY 1992 VL 323 IS 3 BP 569 EP 579 DI 10.1016/0168-9002(92)90002-L PG 11 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KE735 UT WOS:A1992KE73500002 ER PT J AU ANDERSON, DF KWAN, S PESKOV, V HOENEISEN, B AF ANDERSON, DF KWAN, S PESKOV, V HOENEISEN, B TI PROPERTIES OF CSI AND CSI-TMAE PHOTOCATHODES SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID PRESSURE; CHAMBERS AB The importance of heating the CsI or CsI-TMAE photocathodes during preparation, as well as the importance of the gas environment on the quantum efficiency is presented. The dependence of the aging characteristics of these photocathodes on the operating temperature, on the presence of gas, and on the charge amplification of the chamber is also discussed. For CsI photocathodes charges in excess of 2 x 10(14) e-/mm2 can be collected with little degradation of performance. A timing resolution of 0.55 ns is also achieved for single photoelectrons suggesting a possible time-of-flight detector. C1 UNIV SAN FRANCISCO QUITO,QUITO,ECUADOR. RP ANDERSON, DF (reprint author), FERMI NATL ACCELERATOR LAB,PARTICLE DETECTOR GRP,BATAVIA,IL 60510, USA. NR 18 TC 67 Z9 67 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD DEC 15 PY 1992 VL 323 IS 3 BP 626 EP 634 DI 10.1016/0168-9002(92)90007-Q PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KE735 UT WOS:A1992KE73500007 ER PT J AU HADLEY, GR AF HADLEY, GR TI MULTISTEP METHOD FOR WIDE-ANGLE BEAM PROPAGATION SO OPTICS LETTERS LA English DT Article AB A new beam-propagation method is presented whereby the Pade approximant wide-angle propagation operator is factored into a series of simpler Pade (1, 1) operators, thus leading naturally to a multistep method whose component steps are each solvable by using readily available paraxiallike solution techniques. The resulting method allows accurate approximations to true Helmholtz propagation while incurring only a modest numerical penalty. In addition, the tridiagonal form of the component steps allows the straightforward use of the previously reported transparent boundary condition. RP HADLEY, GR (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 9 TC 133 Z9 139 U1 0 U2 8 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD DEC 15 PY 1992 VL 17 IS 24 BP 1743 EP 1745 DI 10.1364/OL.17.001743 PG 3 WC Optics SC Optics GA KD912 UT WOS:A1992KD91200005 PM 19798302 ER PT J AU BAK, P AF BAK, P TI SELF-ORGANIZED CRITICALITY IN NONCONSERVATIVE MODELS SO PHYSICA A LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON FRACTALS AND DISORDERED SYSTEMS CY JUL 29-31, 1992 CL UNIV HAMBURG, HAMBURG, GERMANY SP DEUT FORSCHUNGSGEMEINSCH, DEUT AKADEM AUSTAUSCHDIENST, HOCHSCHULAMT HAMBURG, IBM, SIEMENS NIXDORF, DIGITAL EQUIPMENT HO UNIV HAMBURG ID NOISE; LIFE AB Some recent results on non-conservative models of self-organized criticality are reviewed and discussed. A class of deterministic models introduced by Olami, Feder and Christensen exhibits 1/f noise with an exponent which depends on the degree of conservation. The ''Game of Life'', a cellular automaton mimicking a society of interacting organisms, also appears to evolve to a critical state, with avalanches obeying finite size scaling. RP BAK, P (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 17 TC 23 Z9 23 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4371 J9 PHYSICA A JI Physica A PD DEC 15 PY 1992 VL 191 IS 1-4 BP 41 EP 46 DI 10.1016/0378-4371(92)90503-I PG 6 WC Physics, Multidisciplinary SC Physics GA KF666 UT WOS:A1992KF66600008 ER PT J AU SANCHEZ, A GUINEA, F LOUIS, E HAKIM, V AF SANCHEZ, A GUINEA, F LOUIS, E HAKIM, V TI ON THE FRACTAL CHARACTERISTICS OF THE ETA MODEL SO PHYSICA A LA English DT Article; Proceedings Paper CT INTERNATIONAL CONF ON FRACTALS AND DISORDERED SYSTEMS CY JUL 29-31, 1992 CL UNIV HAMBURG, HAMBURG, GERMANY SP DEUT FORSCHUNGSGEMEINSCH, DEUT AKADEM AUSTAUSCHDIENST, HOCHSCHULAMT HAMBURG, IBM, SIEMENS NIXDORF, DIGITAL EQUIPMENT HO UNIV HAMBURG ID DIFFUSION-LIMITED AGGREGATION; LAPLACIAN RANDOM-WALK; DIELECTRIC-BREAKDOWN; DIMENSIONALITY AB Since the eta or dielectric breakdown model was proposed, it has been generally accepted that the fractal characteristics of the so-grown clusters have a smooth behavior as eta increases from 0 to infinity. On the basis of recent theoretical calculations on a related model, we conjecture that the aggregate can become effectively branchless for eta larger than a critical value eta1. A related possibility is that the value 1 for the fractal dimension might be reached at finite values of eta. We have carried out a large simulation program to test these conjectures and we find evidence supporting their validity. This is a preliminary report of our work on this problem. C1 UNIV COMPLUTENSE MADRID,FAC CIENCIAS FIS,DEPT FIS TEOR,E-28040 MADRID,SPAIN. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. UNIV AUTONOMA MADRID,FAC CIENCIAS CXII,INST CIENCIA MAT,E-28049 MADRID,SPAIN. UNIV MICHIGAN,HARRISON M RANDALL LAB PHYS,ANN ARBOR,MI 48109. UNIV ALICANTE,DEPT FIS APLICADA,E-03080 ALICANTE,SPAIN. ENS,PHYS STAT LAB,F-75231 PARIS 05,FRANCE. UNIV PARIS 06,F-75231 PARIS 5,FRANCE. UNIV PARIS 07,F-75231 PARIS,FRANCE. RI Sanchez, Angel/A-9229-2008; Guinea, Francisco/A-7122-2008 OI Sanchez, Angel/0000-0003-1874-2881; Guinea, Francisco/0000-0001-5915-5427 NR 13 TC 4 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4371 J9 PHYSICA A JI Physica A PD DEC 15 PY 1992 VL 191 IS 1-4 BP 123 EP 127 DI 10.1016/0378-4371(92)90515-R PG 5 WC Physics, Multidisciplinary SC Physics GA KF666 UT WOS:A1992KF66600020 ER PT J AU JARZYNSKI, C AF JARZYNSKI, C TI DIFFUSION EQUATION FOR ENERGY IN ERGODIC ADIABATIC ENSEMBLES SO PHYSICAL REVIEW A LA English DT Article ID ANISOTROPIC KEPLER PROBLEM; INVARIANTS; BILLIARDS AB A diffusion equation is derived for the distribution of energies of an ensemble of systems governed by an ergodic adiabatic Hamiltonian. We compare the predictions of this equation with previously derived results and find some disagreement. We obtain explicit expressions for the degree to which the ergodic adiabatic invariant is conserved. We demonstrate that our equation gives the expected results for two special cases. Finally, we discuss applications and tests of our theory, as well as directions for future study. C1 UNIV CALIF BERKELEY,BERKELEY,CA 94720. RP JARZYNSKI, C (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Jarzynski, Christopher/B-4490-2009 OI Jarzynski, Christopher/0000-0002-3464-2920 NR 24 TC 27 Z9 27 U1 0 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD DEC 15 PY 1992 VL 46 IS 12 BP 7498 EP 7509 DI 10.1103/PhysRevA.46.7498 PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KE871 UT WOS:A1992KE87100025 ER PT J AU KANIA, DR KORNBLUM, H HAMMEL, BA SEELY, J BROWN, C FELDMAN, U GLENDINNING, G YOUNG, P HSIEH, E HENNESIAN, M DASILVA, L MACGOWAN, BJ MONTGOMERY, DS BACK, CA DOYAS, R EDWARDS, J LEE, RW AF KANIA, DR KORNBLUM, H HAMMEL, BA SEELY, J BROWN, C FELDMAN, U GLENDINNING, G YOUNG, P HSIEH, E HENNESIAN, M DASILVA, L MACGOWAN, BJ MONTGOMERY, DS BACK, CA DOYAS, R EDWARDS, J LEE, RW TI CHARACTERIZATION OF AN X-RAY-FLUX SOURCE FOR THE PRODUCTION OF HIGH-ENERGY-DENSITY PLASMAS SO PHYSICAL REVIEW A LA English DT Article ID LASER IRRADIATION; DISK TARGETS; SPECTROGRAPH; RADIATION; TRANSPORT; EMISSION; SPECTRA; HOT AB The results from a series of experiments that characterize the x-ray flux transmitted through a laser-irradiated Au foil are presented. The purpose of the experiments was to develop a working model for an x-ray source that will create hot, dense plasmas with controllable gradients. These plasmas will be used as a test bed for the study of the complex radiative processes that are intrinsic to the evolution of moderate- and high-Z matter. The experiments quantitatively measured the time- and frequency-dependent energy transferred to the back of the foil. Angular information and the characterization of the flux as a function of foil thickness are also presented. Tables of the time-dependent flux are given. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. ECOLE POLYTECH, PHYS MILIEUX IONISES LAB, F-91128 PALAISEAU, FRANCE. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, BLACKETT LAB, LONDON SW7 2BZ, ENGLAND. USN, RES LAB, EO HULBURT CTR SPACE RES, WASHINGTON, DC 20375 USA. RP KANIA, DR (reprint author), LAWRENCE LIVERMORE NATL LAB, POB 808, LIVERMORE, CA 94550 USA. OI Montgomery, David/0000-0002-2355-6242 NR 25 TC 43 Z9 43 U1 1 U2 8 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 EI 1094-1622 J9 PHYS REV A JI Phys. Rev. A PD DEC 15 PY 1992 VL 46 IS 12 BP 7853 EP 7868 DI 10.1103/PhysRevA.46.7853 PG 16 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KE871 UT WOS:A1992KE87100060 ER PT J AU CAUSSYN, DD BALL, M BRABSON, B COLLINS, J CURTIS, SA DERENCHUK, V DUPLANTIS, D EAST, G ELLISON, M ELLISON, T FRIESEL, D HAMILTON, B JONES, WP LAMBLE, W LEE, SY LI, D MINTY, MG SLOAN, T XU, G CHAO, AW NG, KY TEPIKIAN, S AF CAUSSYN, DD BALL, M BRABSON, B COLLINS, J CURTIS, SA DERENCHUK, V DUPLANTIS, D EAST, G ELLISON, M ELLISON, T FRIESEL, D HAMILTON, B JONES, WP LAMBLE, W LEE, SY LI, D MINTY, MG SLOAN, T XU, G CHAO, AW NG, KY TEPIKIAN, S TI EXPERIMENTAL STUDIES OF NONLINEAR BEAM DYNAMICS SO PHYSICAL REVIEW A LA English DT Article AB The nonlinear beam dynamics of transverse betatron oscillations were studied experimentally at the Indiana University Cyclotron Facility cooler ring. Motion in one dimension was measured for betatron tunes near the third, fourth, fifth, and seventh integer resonances. This motion is described by coupling between the transverse modes of motion and nonlinear field errors. The Hamiltonian for nonlinear particle motion near the third- and fourth-integer-resonance conditions has been deduced. C1 SUPERCOND SUPER COLLIDER LAB,DALLAS,TX 75237. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP CAUSSYN, DD (reprint author), INDIANA UNIV,INDIANA UNIV CYCLOTRON FACIL,BLOOMINGTON,IN 47405, USA. OI Curtis, Scott/0000-0002-5510-4566 NR 20 TC 29 Z9 32 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD DEC 15 PY 1992 VL 46 IS 12 BP 7942 EP 7952 DI 10.1103/PhysRevA.46.7942 PG 11 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KE871 UT WOS:A1992KE87100069 ER PT J AU ANFEROV, VA BAIOD, R CHAO, AW CHU, CM COURANT, ED DERBENEV, YS DURYEA, J KRISCH, AD MINTY, MG PHELPS, RA SHOUMKIN, DS WONG, VK CAUSSYN, DD ELLISON, M ELLISON, TJP LEE, SY RINCKEL, T SPERISEN, F STEPHENSON, EJ VONPRZEWOSKI, B WIENANDS, U RATNER, LG AF ANFEROV, VA BAIOD, R CHAO, AW CHU, CM COURANT, ED DERBENEV, YS DURYEA, J KRISCH, AD MINTY, MG PHELPS, RA SHOUMKIN, DS WONG, VK CAUSSYN, DD ELLISON, M ELLISON, TJP LEE, SY RINCKEL, T SPERISEN, F STEPHENSON, EJ VONPRZEWOSKI, B WIENANDS, U RATNER, LG TI EFFECT OF A PARTIAL SIBERIAN SNAKE ON AN RF-INDUCED DEPOLARIZING RESONANCE SO PHYSICAL REVIEW A LA English DT Note AB A recent experiment studied the effect of an rf solenoid magnet and a partial Siberian snake on a 120-MeV polarized proton bearn. We measured the frequencies of the ''rf-induced'' depolarizing resonance for different values of the snake strength; this frequency measurement determined the spin tune nu(sp), which is the number of spin precessions in one turn around the ring. A 4% snake increased the frequency of the rf-induced depolarizing resonance by the predicted 11 kHz and thus shifted the spin tune by the predicted DELTAnu(sp) = 0.006 88 +/- 0.000 04; as expected, the 4% snake also tilted the stable spin direction by more than 38-degrees from the vertical. C1 INDIANA UNIV CYCLOTRON FACIL,BLOOMINGTON,IN 47408. TRIUMF,VANCOUVER V6T 2A3,BC,CANADA. BROOKHAVEN NATL LAB,AGS DEPT,UPTON,NY 11973. RP ANFEROV, VA (reprint author), UNIV MICHIGAN,RANDALL LAB PHYS,ANN ARBOR,MI 48109, USA. NR 10 TC 25 Z9 25 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD DEC 15 PY 1992 VL 46 IS 12 BP R7383 EP R7386 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KE871 UT WOS:A1992KE87100011 ER PT J AU ROSENAU, P AF ROSENAU, P TI TEMPERED DIFFUSION - A TRANSPORT PROCESS WITH PROPAGATING FRONTS AND INERTIAL DELAY SO PHYSICAL REVIEW A LA English DT Note AB The speed of sound is the highest admissible free velocity in a medium. This property is lost in the classical transport theory that predicts the unphysical divergence of the flux with gradients. Keeping the acoustic speed provides the means to control the growth of the flux and enables us to derive a better transport theory; flux saturates as the gradients became unbounded. Initial discontinuities persist for a finite time and diffusion fronts are convected with a finite speed. Various applications are considered (heat or mass transfer, plasma diffusion, and hydrodynamics). C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP ROSENAU, P (reprint author), TECHNION ISRAEL INST TECHNOL,FAC MECH ENGN,IL-32000 HAIFA,ISRAEL. NR 13 TC 57 Z9 57 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD DEC 15 PY 1992 VL 46 IS 12 BP R7371 EP R7374 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KE871 UT WOS:A1992KE87100008 ER PT J AU ZHANG, XG BUTLER, WH NICHOLSON, DM NESBET, RK AF ZHANG, XG BUTLER, WH NICHOLSON, DM NESBET, RK TI GREEN-FUNCTION CELLULAR METHOD FOR THE ELECTRONIC-STRUCTURE OF MOLECULES AND SOLIDS SO PHYSICAL REVIEW B LA English DT Article ID MULTIPLE-SCATTERING THEORY; ORBITAL METHOD; ENERGY-BAND AB A technique for obtaining rigorous solutions to the single-electron Schrodinger equation for solids and molecules, the Green-function cellular method (GFCM), is described. The technique is similar to full-potential multiple-scattering theory in that basis functions which are locally exact solutions to the Schrodinger equation within each potential cell are used to represent the wave function. Unlike multiple-scattering theory, however, the coefficients of expansion for the wave function are determined by a secular matrix which couples only nearest-neighbor cells. The matrix elements are Wronskian-like integrals over cell surfaces which may be chosen independently for each atomic cell. Similarly to multiple-scattering theory, the GFCM can be used to calculate the system Green function directly. As a special case, the GFCM formalism can be used to calculate the structure constants of Korringa-Kohn-Rostoker theory without using Ewald sums. Numerical calculations of the energy bands of fcc Cu illustrate the speed and flexibility of the method. A simple linearization scheme which allows the use of multiple energy panels without introducing discontinuities in the energy bands is used in these calculations. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. IBM CORP,ALMADEN RES CTR,SAN JOSE,CA 95120. RP ZHANG, XG (reprint author), UNIV KENTUCKY,CTR COMPUTAT SCI,LEXINGTON,KY 40506, USA. NR 27 TC 2 Z9 2 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1992 VL 46 IS 23 BP 15031 EP 15039 DI 10.1103/PhysRevB.46.15031 PG 9 WC Physics, Condensed Matter SC Physics GA KG306 UT WOS:A1992KG30600008 ER PT J AU CHANG, YC JAMES, RB AF CHANG, YC JAMES, RB TI ELECTRONIC AND OPTICAL-PROPERTIES OF HGI2 SO PHYSICAL REVIEW B LA English DT Article ID MERCURIC IODIDE HGI2; PHOTOLUMINESCENCE; SPECTROSCOPY; DETECTORS; SPECTRUM; EXCITON AB Empirical nonlocal pseudopotential calculations of the electronic band structure of undoped mercuric iodide in its red tetragonal form are presented. Values for the electron and hole effective masses, optical matrix elements for interband transitions, and complex dielectric function are reported. Excitonic effects on the absorption coefficient near the fundamental band gap are included within the effective-mass approximation. The resulting absorption spectra and the polarization dependence are in good agreement with experiment. The dielectric-function spectra for photon energies between 2 and 10 eV are also calculated and they are in fair agreement with available data. C1 UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801. SANDIA NATL LABS,DIV ADV MAT RES,LIVERMORE,CA 94550. RP CHANG, YC (reprint author), UNIV ILLINOIS,DEPT PHYS,1110 W GREEN ST,URBANA,IL 61801, USA. RI Chang, Yia-Chung/F-4239-2011 NR 34 TC 23 Z9 25 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1992 VL 46 IS 23 BP 15040 EP 15045 DI 10.1103/PhysRevB.46.15040 PG 6 WC Physics, Condensed Matter SC Physics GA KG306 UT WOS:A1992KG30600009 ER PT J AU SWANSON, LS SHINAR, J BROWN, AR BRADLEY, DDC FRIEND, RH BURN, PL KRAFT, A HOLMES, AB AF SWANSON, LS SHINAR, J BROWN, AR BRADLEY, DDC FRIEND, RH BURN, PL KRAFT, A HOLMES, AB TI ELECTROLUMINESCENCE-DETECTED MAGNETIC-RESONANCE STUDY OF POLYPARAPHENYLENEVINYLENE (PPV)-BASED LIGHT-EMITTING-DIODES SO PHYSICAL REVIEW B LA English DT Article ID RECOMBINATION PROCESSES; CONJUGATED POLYMERS; 3-LAYER STRUCTURE; SI-H; POLARONS; FILMS; SPECTRA; DEVICE; SOLIDS AB The strong electroluminescence (EL)-detected magnetic resonance of PPV-based light emitting diodes is compared to the conductivity (sigma)- and photoluminescence (PL)-detected resonances. It provides direct evidence that polaron-to-singlet exciton conversion is responsible for the EL. In contrast to the narrow PL-enhancing resonance assigned to polaron recombination, strong EL- and sigma-quenching resonances are attributed to the spin-dependent polaron-to-bipolaron decay. The half-field EL- and sigma-detected resonances of two distinct triplet excitons is believed to result from triplet-triplet fusion to singlets. C1 IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS & ASTRON, AMES, IA 50011 USA. UNIV CAMBRIDGE, CAVENDISH LAB, CAMBRIDGE CB3 0HE, ENGLAND. UNIV CAMBRIDGE, CHEM LAB, DEPT CHEM, CAMBRIDGE CB2 1EW, ENGLAND. RP IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. RI Burn, Paul/F-5347-2010; Bradley, Donal/F-6068-2011 OI Bradley, Donal/0000-0001-8713-5060 NR 39 TC 115 Z9 117 U1 1 U2 11 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1992 VL 46 IS 23 BP 15072 EP 15077 DI 10.1103/PhysRevB.46.15072 PG 6 WC Physics, Condensed Matter SC Physics GA KG306 UT WOS:A1992KG30600014 ER PT J AU SANBORN, BA ALLEN, PB MAHAN, GD AF SANBORN, BA ALLEN, PB MAHAN, GD TI THEORY OF SCREENING AND ELECTRON-MOBILITY - APPLICATION TO N-TYPE SILICON SO PHYSICAL REVIEW B LA English DT Article ID IONIZED-IMPURITY SCATTERING; ONE-COMPONENT PLASMA; HEAVILY DOPED SILICON; STATISTICAL-MECHANICS; SIMPLE METALS; GROUND-STATE; SEMICONDUCTORS; RESISTIVITY; LIQUIDS; LIMIT AB The dielectric function for semidegenerate n-type silicon is calculated in both the random-phase approximation (RPA) and the Singwi-Tosi-Land-Sjolander (STLS) approximation in a study of linear screening theory and electron mobility. Using a spherical effective-mass model for the six conduction-band valleys, the Boltzmann equation is solved exactly for phonon plus impurity scattering and the resulting mobility is compared with experiment. Significant differences are found in doped silicon at nonzero temperatures between Boltzmann equation solutions in the RPA Born approximation and the less accurate force-force correlation function formula for the electrical resistivity due to electron-impurity scattering. Phonon scattering has only secondary importance and is treated by standard deformation-potential models. The problem of scattering by linearly screened ionized impurities is treated with exact phase-shift scattering theory. RPA phase-shift calculated electron mobilities in n-type silicon at 300 and 77 K agree more closely with experiment than the Born approximation or Thomas-Fermi calculations. The local field correction to RPA screening of impurity potentials is not significant in scattering cross sections when the electron-electron vertex function is included. However, assuming full ionization, the STLS dielectric function yields negative electronic compressibilities at 77 K in a concentration region centered approximately where the metal-insulator transition takes place at T = 0, and coinciding with strong violations of the Friedel sum rule by linearly screened potentials. Strong Coulomb interactions are indicated and imply an inadequacy of linear screening theory, the Born approximation, and the Boltzmann equation for electron-impurity scattering applied to the electron-gas model for doped silicon at low temperature, despite apparently good agreement with experiment. C1 UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP SANBORN, BA (reprint author), SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794, USA. NR 70 TC 15 Z9 15 U1 1 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1992 VL 46 IS 23 BP 15123 EP 15134 DI 10.1103/PhysRevB.46.15123 PG 12 WC Physics, Condensed Matter SC Physics GA KG306 UT WOS:A1992KG30600020 ER PT J AU SEAGER, CH KANICKI, J AF SEAGER, CH KANICKI, J TI NEAR-IR ABSORPTION IN CHEMICALLY VAPOR-DEPOSITED A-SINXH FILMS SO PHYSICAL REVIEW B LA English DT Article ID HYDROGENATED AMORPHOUS-SILICON; PHOTOTHERMAL DEFLECTION SPECTROSCOPY; OPTICAL-ABSORPTION; NITRIDE AB We have measured the optical-absorption properties of plasma-enhanced chemically vapor deposited films of hydrogenated amorphous silicon nitride (a-SiNx:H) over the energy range from 0.54 to 2 eV using photothermal deflection spectroscopy (PDS). Typical PDS spectra show a broad absorption tail with a large number of narrow absorption peaks. Using the phase sensitive feature of this spectroscopy we are able to separate nitride-related absorption from that arising from the fused quartz substrates. In addition to the broad, featureless band tail, whose magnitude is quite sensitive to optical excitation with light above approximately 3.9 eV, we observe a number of narrow absorption peaks which are most likely overtones of localized vibrational modes. Specifically, we see peaks at 0.82 and 1.20 eV which we identify as the first and second harmonics of N-H stretching vibrations, and several other peaks whose origins remain undetermined. Prolonged UV excitation produces no detectable change in these vibrational modes, although large changes are seen in the underlying absorption tail. This reinforces previous suggestions that photoinduced changes in these films do not arise from rearrangement of the bonded hydrogen. C1 IBM CORP,DIV RES,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. RP SEAGER, CH (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. RI Kanicki, Jerzy/E-2753-2016 OI Kanicki, Jerzy/0000-0002-3649-8360 NR 17 TC 7 Z9 7 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1992 VL 46 IS 23 BP 15163 EP 15168 DI 10.1103/PhysRevB.46.15163 PG 6 WC Physics, Condensed Matter SC Physics GA KG306 UT WOS:A1992KG30600025 ER PT J AU FROTA, HO FLENSBERG, K AF FROTA, HO FLENSBERG, K TI RENORMALIZATION-GROUP CALCULATIONS OF GROUND-STATE AND TRANSPORT-PROPERTIES OF ULTRASMALL TUNNEL-JUNCTIONS SO PHYSICAL REVIEW B LA English DT Article ID COULOMB-BLOCKADE; QUANTUM FLUCTUATIONS; ELECTROMAGNETIC ENVIRONMENT; OHMIC CONDUCTION; KONDO PROBLEM; DISSIPATION; TRANSITION; DYNAMICS AB We have done a numerical renormalization-group calculation for a Hamiltonian modeling charging effect in ultrasmall tunnel junctions. We find that the conductance is enhanced by the quantum charge fluctuations allowing tunneling below the charging energy gap. However, in all cases the conductance is found to vanish at zero frequency. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. UNIV AMAZONAS,INST CIENCIAS EXATAS,DEPT FIS,BR-69068 MANUAS AM,BRAZIL. RP FROTA, HO (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. RI Flensberg, Karsten/N-4718-2014 OI Flensberg, Karsten/0000-0002-8311-0103 NR 27 TC 9 Z9 9 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1992 VL 46 IS 23 BP 15207 EP 15211 DI 10.1103/PhysRevB.46.15207 PG 5 WC Physics, Condensed Matter SC Physics GA KG306 UT WOS:A1992KG30600030 ER PT J AU FEIBELMAN, PJ AF FEIBELMAN, PJ TI IMPURITY CALCULATIONS VIA A DISTORTED-WAVE MATRIX GREEN-FUNCTION METHOD SO PHYSICAL REVIEW B LA English DT Article ID PSEUDOPOTENTIALS; AL(001); CORE AB The computational efficiency of matrix Green's-function scattering theory is improved by solving Dyson's equation in two steps. The first step yields a distorted-wave Green's function that incorporates the effects of the kinetic-energy matrix's impurity-host blocks. This is the longest-ranged component of the impurity-host interaction, but is iteration independent. The second step, which must be performed numerous times as one iterates to self-consistency, adds the effects of the electron-electron interaction. Computational effort per iteration is reduced because the range of the electron-electron interaction matrix is limited by screening. The distorted-wave method is illustrated via calculations of the adsorption energy of a single Al adatom on an Al(111) substrate. RP FEIBELMAN, PJ (reprint author), SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. NR 19 TC 11 Z9 11 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1992 VL 46 IS 23 BP 15416 EP 15420 DI 10.1103/PhysRevB.46.15416 PG 5 WC Physics, Condensed Matter SC Physics GA KG306 UT WOS:A1992KG30600055 ER PT J AU CHEN, J CROFT, M JEON, Y XU, X SHAHEEN, SA LU, F AF CHEN, J CROFT, M JEON, Y XU, X SHAHEEN, SA LU, F TI X-RAY-ABSORPTION-SPECTROSCOPY STUDIES OF TRANSITION-METAL BORON-COMPOUNDS SO PHYSICAL REVIEW B LA English DT Article ID ELECTRONIC-STRUCTURE; ORBITAL OCCUPANCY; FINE-STRUCTURE; SPECTRA; STATES; AU; PD AB L2,3-edge x-ray-absorption-spectroscopy studies of the white-line feature are used to probe the electronic structure of 4d transition-metal (T) -based materials. Results of such probes of the elements Mo to Ag are reviewed. Results of a number of binary Pd-B and ternary Rh-B compounds are interpreted in terms of the loss of d states just above E(F) and the formation of hybridized T-4d/B antibonding states split well above E(f). C1 BROOKHAVEN NATL LAB,DIV APPL PHYS SCI,UPTON,NY 11973. FLORIDA STATE UNIV,CTR MAT RES,DEPT PHYS,TALLAHASSEE,FL 32306. UNIV KENTUCKY,LEXINGTON,KY 40506. RP CHEN, J (reprint author), RUTGERS STATE UNIV,DEPT PHYS & ASTRON,PISCATAWAY,NJ 08855, USA. NR 25 TC 12 Z9 12 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1992 VL 46 IS 24 BP 15639 EP 15644 DI 10.1103/PhysRevB.46.15639 PG 6 WC Physics, Condensed Matter SC Physics GA KF587 UT WOS:A1992KF58700001 ER PT J AU KANG, JS HONG, JH JEONG, JI CHOI, SD YANG, CJ LEE, YP OLSON, CG MIN, BI ALLEN, JW AF KANG, JS HONG, JH JEONG, JI CHOI, SD YANG, CJ LEE, YP OLSON, CG MIN, BI ALLEN, JW TI PHOTOEMISSION-STUDY OF RCO2(R = CE, PR, ND) SO PHYSICAL REVIEW B LA English DT Article ID PHOTOIONIZATION CROSS-SECTIONS; VALENCE-BAND PHOTOEMISSION; AUGER LINE-SHAPE; RESONANCE PHOTOEMISSION; 2-ELECTRON RESONANCES; TRANSITION-METALS; SPECTRA; MODEL; FE; SATELLITES AB We report the photoemission spectroscopy (PES) studies on RCo2 (R = Y, Ce, Pr, Nd). The R 4f PES spectra of RCo2 exhibit double peak structures, in which the spectral weight close to E(F) decreases from CeCo2 to PrCo2 and NdCo2. The Ce valence in CeCo2 is estimated to be -3.2, whereas rare-earth valences in PrCo2 and NdCo2 are close to 3+, implying that the contribution from the R 4f localized moment would be larger in PrCo2 and NdCo2. The Co 3d spectra are found essentially identical in large energy scales, suggesting that the Co 3d electronic structures are very similar in RCo2 for light rare earths. Weak Co 3d satellite features are observed about 5 eV below E(F). The comparison with the band-structure calculations for RCo2 shows that the theoretical Co 3d bandwidths are comparable to the experimental bandwidths, which can be considered to imply a rather delocalized nature of Co 3d electrons. However, some discrepancies are found in the spectral weight near the satellite emission, which implies that Co 3d correlations are non-negligible. The existence of the non-negligible Co 3d correlation effects is also supported by the analysis of Co MVV Auger spectra. C1 IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. POHANG INST SCI & TECHNOL, DEPT PHYS, POHANG 790600, SOUTH KOREA. UNIV MICHIGAN, DEPT PHYS, ANN ARBOR, MI 48109 USA. RP KANG, JS (reprint author), RES INST IND SCI & TECHNOL, POHANG 790600, SOUTH KOREA. NR 46 TC 30 Z9 30 U1 0 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1992 VL 46 IS 24 BP 15689 EP 15696 DI 10.1103/PhysRevB.46.15689 PG 8 WC Physics, Condensed Matter SC Physics GA KF587 UT WOS:A1992KF58700007 ER PT J AU WANG, WB ALFANO, RR SZMYD, D NOZIK, AJ AF WANG, WB ALFANO, RR SZMYD, D NOZIK, AJ TI DETERMINATION OF THE CRITICAL VALUE OF XC FOR THE DIRECT-TO-INDIRECT BAND-GAP TRANSITION IN ALXGA1-XAS BY MEASURING HOT-CARRIER DYNAMICS IN THE X-VALLEY SO PHYSICAL REVIEW B LA English DT Article ID INTERVALLEY SCATTERING; GAAS; SPECTROSCOPY; RATES AB The time evolution of the population of hot electrons in the satellite X valley in AlxGa1-xAs was measured by femtosecond pump-probe infrared (IR)-absorption spectroscopy. The dynamics of the X-valley electrons for samples with x less-than-or-equal-to 0.408 was found to be different from that for samples with x greater-than-or-equal-to 0.439 which reflects their different types of band gaps. The critical value of x(c) that corresponds to the direct-to-indirect band-gap transition for AlxGa1-xAs was determined to be 0.412+/-0.009 from the composition dependence of the induced IR absorption. C1 SOLAR ENERGY RES INST,GOLDEN,CO 80401. RP WANG, WB (reprint author), CUNY CITY COLL,INST ULTRAFAST SPECTROSCOPY & LASERS,DEPT PHYS,NEW YORK,NY 10031, USA. NR 19 TC 5 Z9 5 U1 2 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1992 VL 46 IS 24 BP 15828 EP 15832 DI 10.1103/PhysRevB.46.15828 PG 5 WC Physics, Condensed Matter SC Physics GA KF587 UT WOS:A1992KF58700020 ER PT J AU ZUO, JK ZEHNER, DM AF ZUO, JK ZEHNER, DM TI TERRACE-WIDTH AND STEP-HEIGHT ENLARGEMENT - RECONSTRUCTION OF THE TAC(310) SURFACE SO PHYSICAL REVIEW B LA English DT Article ID PHASE-TRANSITION; CRYSTAL SHAPES; MODEL; DIFFRACTION; SI(001); GROWTH AB The geometric structure of the TaC(310) surface has been investigated using high-resolution low-energy electron diffraction. An ideally truncated TaC(310) surface has a staircase geometry where each unit consists of a (100) terrace, three row spacings wide, separated by a single-height step. However, it is. determined that the surface is reconstructed with both terrace width and step height tripled on average while the surface still retains the (310) orientation. In addition, a small number of double-height steps are found to coexist with the triple-height steps. Possible physical origins of these observations are discussed. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. NR 26 TC 7 Z9 7 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1992 VL 46 IS 24 BP 16122 EP 16127 DI 10.1103/PhysRevB.46.16122 PG 6 WC Physics, Condensed Matter SC Physics GA KF587 UT WOS:A1992KF58700048 ER PT J AU SELA, I BOLOGNESI, CR KROEMER, H AF SELA, I BOLOGNESI, CR KROEMER, H TI SINGLE-MODE BEHAVIOR OF ALSB1-XASX ALLOYS SO PHYSICAL REVIEW B LA English DT Note AB Raman scattering is used to characterize the long-wavelength optical-mode behavior of AlSb1-xAsx, alloys grown by molecular-beam epitaxy, for a variety of As mole fractions. Single LO and TO modes are observed for 0 less-than-or-equal-to x less-than-or-equal-to 1, at frequencies depending on the As concentration. This behavior is characteristic of single-mode alloys. The single-mode behavior of AlSb1-xAsx disagrees with theoretical predictions, and calls for a review of the theory of optical modes in AB1-xCx crystals. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV CALIF SANTA BARBARA,DEPT ELECT & COMP ENGN,SANTA BARBARA,CA 93106. NR 6 TC 17 Z9 17 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD DEC 15 PY 1992 VL 46 IS 24 BP 16142 EP 16147 DI 10.1103/PhysRevB.46.16142 PG 6 WC Physics, Condensed Matter SC Physics GA KF587 UT WOS:A1992KF58700051 ER PT J AU HABIB, S KANDRUP, HE AF HABIB, S KANDRUP, HE TI NONLINEAR NOISE IN COSMOLOGY SO PHYSICAL REVIEW D LA English DT Article ID QUANTUM LANGEVIN EQUATION; PARTICLE; UNIVERSE AB This paper derives and analyzes exact, nonlocal Langevin equations appropriate in a cosmological setting to describe the interaction of some collective degree of freedom with a surrounding ''environment.'' Formally, these equations are much more general, involving as they do a more or less arbitrary ''system,'' characterized by some time-dependent potential, which is coupled via a nonlinear, time-dependent interaction to a ''bath'' of oscillators with time-dependent frequencies. The analysis reveals that, even in a Markov limit, which can often be justified, the time dependences and nonlinearities can induce new and potentially significant effects, such as systematic and stochastic mass renormalizations and state-dependent ''memory'' functions, aside from the standard ''friction'' of a heuristic Langevin description. One specific example is discussed in detail, namely, the case of an inflaton field, characterized by a Landau-Ginzburg potential, that is coupled quadratically to a bath of scalar ''radiation.'' The principal conclusion derived from this example is that nonlinearities and time-dependent couplings do not preclude the possibility of deriving a fluctuation-dissipation theorem, and do not change the form of the late-time steady state solution for the system, but can significantly shorten the time scale for the approach towards the steady state. C1 UNIV FLORIDA,INST FUNDAMENTAL THEORY,GAINESVILLE,FL 32611. UNIV FLORIDA,DEPT ASTRON,GAINESVILLE,FL 32611. RP HABIB, S (reprint author), LOS ALAMOS NATL LAB,T-6,LOS ALAMOS,NM 87545, USA. NR 30 TC 19 Z9 19 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD DEC 15 PY 1992 VL 46 IS 12 BP 5303 EP 5314 DI 10.1103/PhysRevD.46.5303 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KE697 UT WOS:A1992KE69700008 ER PT J AU HOLMAN, R HSU, S VACHASPATI, T WATKINS, R AF HOLMAN, R HSU, S VACHASPATI, T WATKINS, R TI METASTABLE COSMIC STRINGS IN REALISTIC MODELS SO PHYSICAL REVIEW D LA English DT Article ID CHARGED DARK MATTER; SUPERCONDUCTING STRINGS; TOPOLOGY; DYNAMICS; SPRINGS AB We investigate the stability of the electroweak Z string at high temperatures. Our results show that while finite-temperature corrections can improve the stability of the Z string, their effect is not strong enough to stabilize the Z string in the standard electroweak model. Consequently, the Z string will be unstable even under the conditions present during the electroweak phase transition. We then consider phenomenologically viable models based on the gauge group SU(2)L X SU(2)R X U(1)B - L and show that metastable strings exist and are stable to small perturbations for a large region of the parameter space for these models. We also show that these strings are superconducting with bosonic charge carriers. The string superconductivity may be able to stabilize segments and loops against dynamical contraction. Possible implications of these strings for cosmology are discussed. C1 HARVARD UNIV,LYMAN LAB PHYS,CAMBRIDGE,MA 02138. TUFTS UNIV,DEPT PHYS & ASTRON,TUFTS INST COSMOL,MEDFORD,MA 02155. UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. FERMI NATL ACCELERATOR LAB,NASA,FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510. RP HOLMAN, R (reprint author), CARNEGIE MELLON UNIV,DEPT PHYS,PITTSBURGH,PA 15213, USA. NR 37 TC 20 Z9 20 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD DEC 15 PY 1992 VL 46 IS 12 BP 5352 EP 5359 DI 10.1103/PhysRevD.46.5352 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KE697 UT WOS:A1992KE69700014 ER PT J AU ALBRECHT, A AF ALBRECHT, A TI INVESTIGATING DECOHERENCE IN A SIMPLE SYSTEM SO PHYSICAL REVIEW D LA English DT Article ID QUANTUM BROWNIAN-MOTION; INFLATIONARY UNIVERSE; LOGICAL REFORMULATION; WAVE PACKET; MECHANICS; PERTURBATIONS; DYNAMICS; FLUCTUATIONS; TRANSITION; COSMOLOGY AB I present the results of some simple calculations designed to study the loss of quantum coherence. The relevant physical issues are briefly reviewed, and then a very simple ''toy'' model is analyzed. Exact solutions are found using numerical techniques. The type of decoherence exhibited by the model can be changed by varying a coupling strength. I study the system from two points of view. One, the Schmidt paths approach, is closely related to the conventional approach of studying decoherence by checking the form of the density matrix. The consistent histories approach is also used, and the relationship between the two approaches is explored. C1 NASA,FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510. NR 47 TC 52 Z9 52 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD DEC 15 PY 1992 VL 46 IS 12 BP 5504 EP 5520 DI 10.1103/PhysRevD.46.5504 PG 17 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KE697 UT WOS:A1992KE69700034 ER PT J AU WILDMAN, DJ EKMANN, JM KADAMBI, JR CHEN, RC AF WILDMAN, DJ EKMANN, JM KADAMBI, JR CHEN, RC TI STUDY OF THE FLOW PROPERTIES OF SLURRIES USING THE REFRACTIVE-INDEX MATCHING TECHNIQUE AND LDV SO POWDER TECHNOLOGY LA English DT Article AB Modern light scattering instrumentation cannot be applied to many concentrated slurries because they are opaque. In this study Laser Doppler Velocimetry is used to measure liquid and solid axial velocity profiles for refractive index matched slurries with solids loadings as great as 25 vol.%. Since measurements in flow geometries more complex than straight horizontal pipe are of interest in many applications, axial velocity profiles through a concentric contraction are reported. The usefulness of these measurements from an experimental perspective and a modeling perspective is discussed. The theoretical analyses of Hanks and Dadia and Hanks and Ricks were applied to the flow data through the constant-diameter pipe. Flow regimes are identified where these theories are appropriate. C1 CASE WESTERN RESERVE UNIV,DEPT MECH & AEROSP ENGN,CASE CTR COMPLEX FLOW MEASUREMENTS,CLEVELAND,OH 44106. RP WILDMAN, DJ (reprint author), PITTSBURGH ENERGY TECHNOL CTR,POB 10940,PITTSBURGH,PA 15236, USA. NR 9 TC 10 Z9 10 U1 1 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0032-5910 J9 POWDER TECHNOL JI Powder Technol. PD DEC 15 PY 1992 VL 73 IS 3 BP 211 EP 218 DI 10.1016/0032-5910(92)85028-T PG 8 WC Engineering, Chemical SC Engineering GA KE441 UT WOS:A1992KE44100003 ER PT J AU KRAFT, SL GAVIN, PR DEHAAN, CE LEATHERS, CW BAUER, WF MILLER, DL DORN, RV AF KRAFT, SL GAVIN, PR DEHAAN, CE LEATHERS, CW BAUER, WF MILLER, DL DORN, RV TI BOROCAPTATE SODIUM - A POTENTIAL BORON DELIVERY COMPOUND FOR BORON NEUTRON-CAPTURE THERAPY EVALUATED IN DOGS WITH SPONTANEOUS INTRACRANIAL TUMORS SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID GLIOMA AB Borocaptate sodium (Na2B12H11SH) is a boron-carrying compound under consideration for use in boron neutron capture therapy. The biodistribution of boron from borocaptate sodium administration will partly determine boron neutron capture therapy efficacy and normal tissue radiation tolerance. The biodistribution of boron was determined in 30 dogs with spontaneous intracranial tumors at 2, 6, or 12 hr after intravenous borocaptate sodium infusion. Blood and tissue boron concentrations were measured using inductively coupled plasma atomic emission spectroscopy. Mean tumor boron concentration (mean +/- standard error) was 35.9 +/- 4.6 (n = 15), 22.5 +/- 6.0 (n = 9), and 7.0 +/- 1.1 mug of boron per g (n = 6) at 2, 6, and 12 hr, respectively, after borocaptate sodium infusion. Peritumor boron concentrations were elevated above that of normal brain in half of the dogs. Normal brain boron concentration (mean +/- standard error) was 4.0 +/- 0.5, 2.0 +/- 0.4, and 2.0 +/- 0.3 mug of boron per g at 2, 6, and 12 hr after infusion, respectively. Some cranial and systemic tissues, and blood, had high boron concentration relative to tumor tissue. Geometric dose sparing should partly offset these relatively high normal tissue and blood concentrations. Borocaptate sodium biodistribution is favorable because tumor boron concentrations of recommended magnitude for boron neutron capture therapy were obtained and there was a high tumor-to-normal brain boron concentration ratio. C1 WASHINGTON STATE UNIV,DEPT VET CLIN MED & SURG,PULLMAN,WA 99164. WASHINGTON STATE UNIV,WASHINGTON ANIM DIS & DIAGNOST LAB,PULLMAN,WA 99164. EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. MTN STATES TUMOR INST,BOISE,ID 83712. RP KRAFT, SL (reprint author), KANSAS STATE UNIV AGR & APPL SCI,COLL VET MED,DEPT VET CLIN SCI,MANHATTAN,KS 66506, USA. RI Bauer, William/B-8357-2016 OI Bauer, William/0000-0002-7190-9700 NR 21 TC 24 Z9 24 U1 0 U2 0 PU NATL ACAD PRESS PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD DEC 15 PY 1992 VL 89 IS 24 BP 11973 EP 11977 DI 10.1073/pnas.89.24.11973 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KC844 UT WOS:A1992KC84400069 PM 1465427 ER PT J AU LI, JCM LIU, CT AF LI, JCM LIU, CT TI CRACK NUCLEATION IN HYDROGEN EMBRITTLEMENT SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID ENVIRONMENTAL EMBRITTLEMENT; FEAL; DISLOCATIONS RP LI, JCM (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831, USA. OI Liu, Chain Tsuan/0000-0001-7888-9725 NR 19 TC 26 Z9 26 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD DEC 15 PY 1992 VL 27 IS 12 BP 1701 EP 1705 DI 10.1016/0956-716X(92)90005-Y PG 5 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KA975 UT WOS:A1992KA97500005 ER PT J AU BOLMARO, RE KOCKS, UF AF BOLMARO, RE KOCKS, UF TI A COMPARISON OF THE TEXTURE DEVELOPMENT IN PURE AND SIMPLE SHEAR AND DURING PATH CHANGES SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID STRESS RP BOLMARO, RE (reprint author), LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545, USA. RI Kocks, Fred/E-1159-2011; Bolmaro, Raul/H-6520-2016 OI Bolmaro, Raul/0000-0002-8218-6958 NR 13 TC 14 Z9 14 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD DEC 15 PY 1992 VL 27 IS 12 BP 1717 EP 1722 DI 10.1016/0956-716X(92)90008-3 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KA975 UT WOS:A1992KA97500008 ER PT J AU REIMANIS, IE AF REIMANIS, IE TI FRACTURE AT NB/AL2O3 INTERFACES SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID RESISTANCE RP REIMANIS, IE (reprint author), LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545, USA. NR 11 TC 3 Z9 3 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD DEC 15 PY 1992 VL 27 IS 12 BP 1729 EP 1734 DI 10.1016/0956-716X(92)90010-C PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KA975 UT WOS:A1992KA97500010 ER PT J AU BRIMHALL, JL BRUEMMER, SM AF BRIMHALL, JL BRUEMMER, SM TI COMPATIBILITY OF HIGH-TEMPERATURE MATERIALS WITH BE12NB SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article RP BRIMHALL, JL (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD DEC 15 PY 1992 VL 27 IS 12 BP 1747 EP 1752 DI 10.1016/0956-716X(92)90013-5 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KA975 UT WOS:A1992KA97500013 ER PT J AU MAZIASZ, PJ GOODWIN, GM LIU, CT DAVID, SA AF MAZIASZ, PJ GOODWIN, GM LIU, CT DAVID, SA TI EFFECTS OF MINOR ALLOYING ELEMENTS ON THE WELDING BEHAVIOR OF FEAL ALLOYS FOR STRUCTURAL AND WELD-OVERLAY CLADDING APPLICATIONS SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article RP MAZIASZ, PJ (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. OI Maziasz, Philip/0000-0001-8207-334X; Liu, Chain Tsuan/0000-0001-7888-9725 NR 10 TC 28 Z9 28 U1 0 U2 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD DEC 15 PY 1992 VL 27 IS 12 BP 1835 EP 1840 DI 10.1016/0956-716X(92)90029-E PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KA975 UT WOS:A1992KA97500029 ER PT J AU TAKEUCHI, K SALMERON, M SOMORJAI, GA AF TAKEUCHI, K SALMERON, M SOMORJAI, GA TI THE BONDING OF HYDROGENATED AND FLUORINATED DIETHERS TO PT(111) AND TO ZIRCONIUM-OXIDE THIN-FILM SO SURFACE SCIENCE LA English DT Article ID CRYSTAL-SURFACES; PLATINUM 111; ADSORPTION; DECOMPOSITION; DEUTERIUM; CHEMISORPTION; ALCOHOLS; ETHER AB Temperature-programmed desorption (TPD) studies of diethers: diethoxymethane (CH3CH2OCH2OCH2CH3), 1,2-diethoxyethane (CH3CH2OCH2CH2OCH2CH3), and perfluoro-1,2-diethoxyethane are carried out on ZrO2 thin films epitaxially grown on a Pt(111) single crystal and on clean Pt(111). The hydrogenated diethers adsorb strongly on both surfaces through the O-lone pair orbital. On the ZrO2 film the adsorption is reversible while on Pt(111) the strongly bound species decompose upon heating. The perfluorinated compound adsorbs reversibly on both substrates. The binding energies of molecular multilayers and monolayers correlate well with the heats of vaporization and with chain length or polarizability of the adsorbates. C1 NATL INST RESOURCES & ENVIRONM,AGCY IND SCI & TECHNOL,DEPT GLOBAL WARMING CONTROL,TSUKUBA,IBARAKI 305,JAPAN. LAWRENCE BERKELEY LAB,DIV MAT SCI,CTR ADV MAT,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NR 26 TC 20 Z9 20 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD DEC 15 PY 1992 VL 279 IS 3 BP 328 EP 340 DI 10.1016/0039-6028(92)90559-O PG 13 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA KF145 UT WOS:A1992KF14500020 ER PT J AU HOFMANN, G MADOK, J HAEGEL, NM ROOS, G JOHNSON, NM HALLER, EE AF HOFMANN, G MADOK, J HAEGEL, NM ROOS, G JOHNSON, NM HALLER, EE TI INTERACTION OF HYDROGEN AND DEUTERIUM WITH COPPER IN GAAS SO APPLIED PHYSICS LETTERS LA English DT Article ID ELECTRICAL-PROPERTIES; DEFECTS; LEVEL AB We have investigated hydrogen and deuterium passivation of two copper-related deep levels at E(V)+0.13 eV and E(V)+0.40 eV in GaAs with deep level transient spectroscopy (DLTS). The DLTS signals of the two copper-related acceptor levels disappear after exposing the samples to a remote hydrogen or deuterium plasma at 300-degrees-C for 1/2 h. Both copper-related levels can be reactivated by thermal annealing. The copper-related donor-accepter pair luminescence at 1.36 eV is correlated with the DLTS signal of the copper-related acceptor level at E(V)+0.13 eV. C1 UNIV CALIF LOS ANGELES,DEPT MAT SCI & ENGN,LOS ANGELES,CA 90024. XEROX CORP,PALO ALTO RES CTR,PALO ALTO,CA 94304. UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. RP HOFMANN, G (reprint author), LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. RI Schaff, William/B-5839-2009 NR 12 TC 17 Z9 17 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD DEC 14 PY 1992 VL 61 IS 24 BP 2914 EP 2916 DI 10.1063/1.108020 PG 3 WC Physics, Applied SC Physics GA KB901 UT WOS:A1992KB90100024 ER PT J AU CLARK, REH CSANAK, G ABDALLAH, J TRAJMAR, S AF CLARK, REH CSANAK, G ABDALLAH, J TRAJMAR, S TI DIFFERENTIAL CROSS-SECTIONS FOR ELECTRON-SCATTERING BY EXCITED BA (...6S6P1P1) ATOMS SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID PUMPED BARIUM VAPOR; IMPACT EXCITATION AB Differential electron scattering cross sections for excitation and de-excitation of Ba (... 6s6p 1P1) excited atoms were calculated at 30 eV impact energy in the unitarized distorted wave approximations using multiconfiguration wavefunctions. The results are compared to available experimental data. It is found that theory and experiment agree quite well as far as the shapes of the differential cross section curves are concerned. For some transitions, even the cross section magnitudes are in agreement, but for others, only order of magnitude agreement is found. Further experimental studies are needed to get a more accurate assessment of the situation. C1 JET PROP LAB,PASADENA,CA 91109. RP CLARK, REH (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 24 TC 6 Z9 6 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD DEC 14 PY 1992 VL 25 IS 23 BP 5233 EP 5244 DI 10.1088/0953-4075/25/23/024 PG 12 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KE313 UT WOS:A1992KE31300024 ER PT J AU WORL, LA HUCKETT, SC SWANSON, BI SAXENA, A BISHOP, AR GAMMEL, JT AF WORL, LA HUCKETT, SC SWANSON, BI SAXENA, A BISHOP, AR GAMMEL, JT TI PHOTOINDUCED CHARGE SEPARATION IN Q1D-HETEROJUNCTION MATERIALS - EVIDENCE FOR ELECTRON-HOLE PAIR SEPARATION IN MIXED-HALIDE MX SOLIDS SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID VALENCE PLATINUM COMPLEXES; CRYSTAL-STRUCTURE; 4; DEFECTS; STATES AB Resonance Raman experiments on doped and photoexcited single crystals of mixed-halide MX complexes (M = Pt; X = Cl, Br) clearly indicate charge separation: electron polarons preferentially locate on PtBr segments while hole polarons are trapped within PtCl segments. This polaron selectivity, potentially very useful for device applications, is demonstrated theoretically using a discrete, 3/4-filled, two-band, tight-binding, extended Peierls-Hubbard model. Strong hybridization of the PtCl and PtBr electronic bands is the driving force for separation. C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. RP WORL, LA (reprint author), LOS ALAMOS NATL LAB,ISOTOPE & STRUCT CHEM,LOS ALAMOS,NM 87545, USA. NR 17 TC 9 Z9 9 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD DEC 14 PY 1992 VL 4 IS 50 BP 10237 EP 10244 DI 10.1088/0953-8984/4/50/012 PG 8 WC Physics, Condensed Matter SC Physics GA KE178 UT WOS:A1992KE17800012 ER PT J AU ADAMOVICH, MI AGGARWAL, MM ALEXANDROV, YA ANDREEVA, NP ANZON, ZV ARORA, R AVETYAN, FA BADYAL, SK BASOVA, E BHALLA, KB BHASIN, A BHATIA, VS BOGDANOV, VG BUBNOV, VI BURNETT, TH CAI, X CHASNIKOV, IY CHERNOVA, LP CHERNYAVSKY, MM ELIGBAEVA, GZ EREMENKO, LE GAITINOV, AS GANSSAUGE, ER GARPMAN, S GERASSIMOV, SG GROTE, J GULAMOV, KG GUPTA, SK HECKMAN, HH HUANG, H JAKOBSSON, B JUDEK, B KACHROO, S KADYROV, FG KALYACHKINA, GS KANYGINA, EK KARABOVA, M KAUL, GL KHARLAMOV, SP KOSS, T KRASNOV, SA KUMAR, V LAL, P LARINOVA, VG LEPETAN, VN LIU, LS LOKANATHAN, S LORD, J LUKICHEVA, NS LUO, SB MANGOTRA, LK MARUTYAN, NA MASLENNIKOVA, NV MITTRA, IS MOOKERJEE, S NASRULAEVA, H NASYROV, SH NAVOTNY, VS ORLOVA, GI OTTERLUND, I PALSANIA, HS PERESADKO, NG PETROV, NV PLYUSHCHEV, VA QIAN, WY RANIWALA, R RANIWALA, S RAO, NK RAPPOPORT, VM RAVINA, J RHEE, JT SAIDKHANOV, N SALMANOVA, NA SARKISOVA, LG SARKISYAN, VR SHABRATOVA, GS SHAKHOVA, TI SKELDING, D SODERSTROM, K SOLOVJEVA, ZI STENLUND, E STRAUSZ, SC SUN, JF SVECHNIKOVA, LN TOLSTOV, KD TRETYAKOVA, MI TROFIMOVA, TP TULEEVA, U VOKAL, S WANG, HQ WENG, ZQ WILKES, RJ XU, GF ZHANG, DH ZHENG, PY ZHOKHOVA, SI ZHOU, DC AF ADAMOVICH, MI AGGARWAL, MM ALEXANDROV, YA ANDREEVA, NP ANZON, ZV ARORA, R AVETYAN, FA BADYAL, SK BASOVA, E BHALLA, KB BHASIN, A BHATIA, VS BOGDANOV, VG BUBNOV, VI BURNETT, TH CAI, X CHASNIKOV, IY CHERNOVA, LP CHERNYAVSKY, MM ELIGBAEVA, GZ EREMENKO, LE GAITINOV, AS GANSSAUGE, ER GARPMAN, S GERASSIMOV, SG GROTE, J GULAMOV, KG GUPTA, SK HECKMAN, HH HUANG, H JAKOBSSON, B JUDEK, B KACHROO, S KADYROV, FG KALYACHKINA, GS KANYGINA, EK KARABOVA, M KAUL, GL KHARLAMOV, SP KOSS, T KRASNOV, SA KUMAR, V LAL, P LARINOVA, VG LEPETAN, VN LIU, LS LOKANATHAN, S LORD, J LUKICHEVA, NS LUO, SB MANGOTRA, LK MARUTYAN, NA MASLENNIKOVA, NV MITTRA, IS MOOKERJEE, S NASRULAEVA, H NASYROV, SH NAVOTNY, VS ORLOVA, GI OTTERLUND, I PALSANIA, HS PERESADKO, NG PETROV, NV PLYUSHCHEV, VA QIAN, WY RANIWALA, R RANIWALA, S RAO, NK RAPPOPORT, VM RAVINA, J RHEE, JT SAIDKHANOV, N SALMANOVA, NA SARKISOVA, LG SARKISYAN, VR SHABRATOVA, GS SHAKHOVA, TI SKELDING, D SODERSTROM, K SOLOVJEVA, ZI STENLUND, E STRAUSZ, SC SUN, JF SVECHNIKOVA, LN TOLSTOV, KD TRETYAKOVA, MI TROFIMOVA, TP TULEEVA, U VOKAL, S WANG, HQ WENG, ZQ WILKES, RJ XU, GF ZHANG, DH ZHENG, PY ZHOKHOVA, SI ZHOU, DC TI ON INTERMITTENCY IN HEAVY-ION COLLISIONS AND THE IMPORTANCE OF GAMMA-CONVERSION IN A MULTIDIMENSIONAL INTERMITTENCY ANALYSIS SO NUCLEAR PHYSICS B LA English DT Article ID INDUCED EMULSION INTERACTIONS; NUCLEAR-INTERACTIONS; HIGH-ENERGY; DISTRIBUTIONS; FLUCTUATIONS; MOMENTS; PROTONS AB Non-statistical fluctuations are used to probe the dynamical behaviour of multi-particle production in heavy-ion interactions at ultra-relativistic energies. In a one-dimensional analysis a 1/[rho]-scaling is established and it is furthermore found that effects from higher-order particle correlations are small. In a two-dimensional analysis it is shown that a small background of particle pairs with a narrow opening angle can distort the observed signal. As an example we estimate the influence of gamma-conversion and find that in our experiment gamma-conversion alone gives results consistent with the experimental observations from a two-dimensional analysis. Whereas a two-dimensional analysis filters events where two particles are extremely close in phase space, the one-dimensional analysis picks out events with particles clustered in pseudorapidity, which are at the same time diluted in the azimuthal plane, C1 PANJAB UNIV,CHANDIGARH 160014,INDIA. ALMA ATA HIGH ENERGY PHYS INST,ALMA ATA,KAZAKHSTAN. YEREVAN PHYS INST,YEREVAN,ARMENIA. UNIV JAMMU,JAMMU 180001,INDIA. TASHKENT NUCL PHYS INST,TASHKENT,UZBEKISTAN. UNIV RAJASTHAN,JAIPUR 302004,RAJASTHAN,INDIA. VG KHLOPIN RADIUM INST,ST PETERSBURG,RUSSIA. UNIV WASHINGTON,SEATTLE,WA 98195. HUA ZHONG NORMAL UNIV,WUHAN,PEOPLES R CHINA. TASHKENT PHYS TECH INST,TASHKENT,UZBEKISTAN. UNIV MARBURG,W-3550 MARBURG,GERMANY. UNIV LUND,S-22101 LUND,SWEDEN. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NRC,OTTAWA,ON,CANADA. JINR,DUBNA,RUSSIA. SHANXI NORMAL UNIV,LINFEN,PEOPLES R CHINA. HUNAN EDUC INST,CHANGSA,PEOPLES R CHINA. CHINESE ACAD SCI,BEIJING,PEOPLES R CHINA. RP ADAMOVICH, MI (reprint author), PN LEBEDEV INST,MOSCOW,RUSSIA. RI Wilkes, R.Jeffrey/E-6011-2013; Peresadko, Natalia/M-9585-2015; Chernyavsky, Mikhail/H-7909-2014; Gerassimov, Sergei/M-8779-2015; Kharlamov, Sergei/M-9612-2015 OI Bhasin, Anju/0000-0002-3687-8179; NR 30 TC 44 Z9 44 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD DEC 14 PY 1992 VL 388 IS 1 BP 3 EP 30 DI 10.1016/0550-3213(92)90543-K PG 28 WC Physics, Particles & Fields SC Physics GA KJ685 UT WOS:A1992KJ68500001 ER PT J AU SHUTT, T ELLMAN, B BARNES, PD CUMMINGS, A DASILVA, A EMES, J GIRAUDHERAUD, Y HALLER, EE LANGE, AE ROSS, RR RICH, J SADOULET, B SMITH, G STOCKWELL, W STUBBS, C WANG, N WHITE, S YOUNG, BA YVON, D AF SHUTT, T ELLMAN, B BARNES, PD CUMMINGS, A DASILVA, A EMES, J GIRAUDHERAUD, Y HALLER, EE LANGE, AE ROSS, RR RICH, J SADOULET, B SMITH, G STOCKWELL, W STUBBS, C WANG, N WHITE, S YOUNG, BA YVON, D TI MEASUREMENT OF IONIZATION AND PHONON PRODUCTION BY NUCLEAR RECOILS IN A 60 G CRYSTAL OF GERMANIUM AT 25 MK SO PHYSICAL REVIEW LETTERS LA English DT Article ID DARK-MATTER; DETECTOR AB We report on the first measurement of the absolute phonon energy and the amount of ionization produced by the recoil of nuclei and electrons in a 60 g germanium crystal at a temperature of almost-equal-to 25 mK. We find good agreement between our results and previous measurements of ionization yield from nuclear recoils in germanium. Our device achieves 10:1 discrimination between neutrons and photons in the few keV energy range, demonstrating the feasibility of this technique for large reductions of background in searches for direct interactions of weakly interacting massive particle dark matter. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106. CENS,SERV PHYS PARTICULES,DEPT ASTROPHYS,F-91191 GIF SUR YVETTE,FRANCE. UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V6T 1Z1,BC,CANADA. COLL FRANCE,PHYS CORPUSCULAIRE LAB,F-75231 PARIS,FRANCE. RP SHUTT, T (reprint author), UNIV CALIF BERKELEY,CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720, USA. RI Yvon, Dominique/D-2280-2015; Stubbs, Christopher/C-2829-2012 OI Stubbs, Christopher/0000-0003-0347-1724 NR 14 TC 99 Z9 99 U1 0 U2 1 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 DEC 14 PY 1992 VL 69 IS 24 BP 3425 EP 3427 DI 10.1103/PhysRevLett.69.3425 PG 3 WC Physics, Multidisciplinary SC Physics GA KB857 UT WOS:A1992KB85700002 ER PT J AU ABE, F AMIDEI, D ANWAYWIESE, C APOLLINARI, G ATAC, M AUCHINCLOSS, P AZZI, P BADEN, AR BACCHETTA, N BADGETT, W BAILEY, MW BAMBERGER, A DEBARBARO, P BARBAROGALTIERI, A BARNES, VE BARNETT, BA BAUER, G BAUMANN, T BEDESCHI, F BEHRENDS, S BELFORTE, S BELLETTINI, G BELLINGER, J BENJAMIN, D BENLLOCH, J BENSINGER, J BERETVAS, A BERGE, JP BERTOLUCCI, S BIERY, K BHADRA, S BINKLEY, M BISELLO, D BLAIR, R BLOCKER, C BODEK, A BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CERVELLI, F CHADWICK, K CHAPMAN, J CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG COBAL, M CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CUNNINGHAM, JD DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ETCHEGOYEN, A FARHAT, B FELDMAN, G FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GOULIANOS, K GRASSMANN, H GRIECO, GM GRINDLEY, R GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRAL, B HARRIS, RM HAUGER, SA HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HONG, S HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, SB KIM, SH KIM, YK KIRSCH, L KONDO, K KONIGSBERG, J KORDAS, K KOVACS, E KRASBERG, M KUHLMANN, SE KUNS, E LAASANEN, AT LAMMEL, S LAMOUREUX, JI LEONE, S LEWIS, JD LI, W LIMON, P LINDGREN, M LISS, TM LOCKYER, N LORETI, M LOW, EH LUCCHESI, D LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTINGLY, R MCINTYRE, P MENZIONE, A MESCHI, E MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A MULLER, T NAKAE, LF NAKANO, I NELSON, C NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PAPADIMITRIOU, V PARA, A PARE, E PARK, S PATRICK, J PAULETTA, G PESCARA, L PHILLIPS, TJ PTOHOS, F PLUNKETT, R PONDROM, L PROUDFOOT, J PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROBERTSON, WJ RODRIGO, T ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCRIBANO, A SEGLER, S SEIYA, Y SGANOS, G SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SINERVO, P SKARHA, J SLIWA, K SPIES, A SMITH, DA SNIDER, FD SONG, L SONG, T SPAHN, M SPHICAS, P STDENIS, R STANCO, L STEFANINI, A SULLIVAN, G SUMOROK, K SWARTZ, RL TAKANO, M TAKIKAWA, K TAREM, S TARTARELLI, F TETHER, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TSENG, J TURINI, N TSAY, Y UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALSH, J WATTS, G WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WICKLUND, E WILLIAMS, HH WINER, BL WOLINSKI, J WU, D WYSS, J YAGIL, A YASUOKA, K YE, Y YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZHANG, S ZUCCHELLI, S AF ABE, F AMIDEI, D ANWAYWIESE, C APOLLINARI, G ATAC, M AUCHINCLOSS, P AZZI, P BADEN, AR BACCHETTA, N BADGETT, W BAILEY, MW BAMBERGER, A DEBARBARO, P BARBAROGALTIERI, A BARNES, VE BARNETT, BA BAUER, G BAUMANN, T BEDESCHI, F BEHRENDS, S BELFORTE, S BELLETTINI, G BELLINGER, J BENJAMIN, D BENLLOCH, J BENSINGER, J BERETVAS, A BERGE, JP BERTOLUCCI, S BIERY, K BHADRA, S BINKLEY, M BISELLO, D BLAIR, R BLOCKER, C BODEK, A BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CERVELLI, F CHADWICK, K CHAPMAN, J CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG COBAL, M CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CUNNINGHAM, JD DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ETCHEGOYEN, A FARHAT, B FELDMAN, G FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GOULIANOS, K GRASSMANN, H GRIECO, GM GRINDLEY, R GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRAL, B HARRIS, RM HAUGER, SA HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HONG, S HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, SB KIM, SH KIM, YK KIRSCH, L KONDO, K KONIGSBERG, J KORDAS, K KOVACS, E KRASBERG, M KUHLMANN, SE KUNS, E LAASANEN, AT LAMMEL, S LAMOUREUX, JI LEONE, S LEWIS, JD LI, W LIMON, P LINDGREN, M LISS, TM LOCKYER, N LORETI, M LOW, EH LUCCHESI, D LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTINGLY, R MCINTYRE, P MENZIONE, A MESCHI, E MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A MULLER, T NAKAE, LF NAKANO, I NELSON, C NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PAPADIMITRIOU, V PARA, A PARE, E PARK, S PATRICK, J PAULETTA, G PESCARA, L PHILLIPS, TJ PTOHOS, F PLUNKETT, R PONDROM, L PROUDFOOT, J PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROBERTSON, WJ RODRIGO, T ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCRIBANO, A SEGLER, S SEIYA, Y SGANOS, G SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SINERVO, P SKARHA, J SLIWA, K SPIES, A SMITH, DA SNIDER, FD SONG, L SONG, T SPAHN, M SPHICAS, P STDENIS, R STANCO, L STEFANINI, A SULLIVAN, G SUMOROK, K SWARTZ, RL TAKANO, M TAKIKAWA, K TAREM, S TARTARELLI, F TETHER, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TSENG, J TURINI, N TSAY, Y UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALSH, J WATTS, G WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WICKLUND, E WILLIAMS, HH WINER, BL WOLINSKI, J WU, D WYSS, J YAGIL, A YASUOKA, K YE, Y YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZHANG, S ZUCCHELLI, S TI SEARCH FOR SQUARKS AND GLUINOS FROM (P)OVER-BAR-P COLLISIONS AT ROOT-S = 1.8 TEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID SOFT GLUON INTERFERENCE; SUPERSYMMETRIC PARTICLES; PBARP COLLISIONS; SIMULATION; COLLIDER; EVENTS; LIMITS; DECAYS; MODEL AB We have analyzed events with jets and large missing transverse energy produced in ppBAR collisions at square-root s = 1.8 TeV. The observed event rate is consistent with standard model predictions. In a version of the supersymmetry (SUSY) model with a light photino (m(gamma) < 15 Gev/c2) and no cascade decays, we exclude at the 90% confidence level the existence of squarks and gluinos with masses less than 126 and 141 GeV/c2, respectively. The mass limits are lower with other choices of the SUSY parameters. An example is presented. C1 UNIV PENN,PHILADELPHIA,PA 19104. ARGONNE NATL LAB,ARGONNE,IL 60439. DUKE UNIV,DURHAM,NC 27706. IST NAZL FIS NUCL,LAB NAZL FRASCATI,FRASCATI,ITALY. PURDUE UNIV,W LAFAYETTE,IN 47907. BRANDEIS UNIV,WALTHAM,MA 02254. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. HARVARD UNIV,CAMBRIDGE,MA 02138. MIT,CAMBRIDGE,MA 02139. UNIV PADUA,IST NAZL FIS NUCL,I-35131 PADUA,ITALY. TUFTS UNIV,MEDFORD,MA 02155. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. ROCKEFELLER UNIV,NEW YORK,NY 10021. UNIV ROCHESTER,ROCHESTER,NY 14627. TEXAS A&M UNIV SYST,COLL STN,TX 77843. UNIV WISCONSIN,MADISON,WI 53706. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CHICAGO,CHICAGO,IL 60637. UNIV ILLINOIS,URBANA,IL 61801. UNIV MICHIGAN,ANN ARBOR,MI 48109. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. RP ABE, F (reprint author), NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. RI St.Denis, Richard/C-8997-2012; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Kim, Soo-Bong/B-7061-2014 OI Chiarelli, Giorgio/0000-0001-9851-4816; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; NR 20 TC 112 Z9 112 U1 1 U2 6 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 DEC 14 PY 1992 VL 69 IS 24 BP 3439 EP 3443 DI 10.1103/PhysRevLett.69.3439 PG 5 WC Physics, Multidisciplinary SC Physics GA KB857 UT WOS:A1992KB85700006 ER PT J AU RUNGE, KJ SURH, MP MAILHIOT, C POLLOCK, EL AF RUNGE, KJ SURH, MP MAILHIOT, C POLLOCK, EL TI PATH INTEGRAL MONTE-CARLO CALCULATIONS OF ORIENTATIONAL ORDERING IN COMPRESSED H-2 SO PHYSICAL REVIEW LETTERS LA English DT Article ID SOLID HYDROGEN; MEGABAR PRESSURES; PHASE-TRANSITIONS; GROUND-STATE; DEUTERIUM; COLLISIONS; SCATTERING; DEPENDENCE; PARA-H-2; GPA AB Pressure-induced orientational ordering transitions in solid molecular hydrogen and its isotopes are determined by path integral Monte Carlo methods. Effective interactions among molecules in the solid are calculated in the local density approximation. Unlike previous calculations which have systematically underestimated the ordering densities for this system, the present treatment affords a calculation of the phase diagrams of H-2 and D2 in excellent agreement with experiment for orientational ordering up to a pressure of 100 GPa. RP RUNGE, KJ (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. NR 28 TC 50 Z9 50 U1 0 U2 5 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 DEC 14 PY 1992 VL 69 IS 24 BP 3527 EP 3530 DI 10.1103/PhysRevLett.69.3527 PG 4 WC Physics, Multidisciplinary SC Physics GA KB857 UT WOS:A1992KB85700028 ER PT J AU SHUTT, T WANG, N ELLMAN, B GIRAUDHERAUD, Y STUBBS, C BARNES, PD CUMMINGS, A DASILVA, A EMES, J HALLER, EE LANGE, AE RICH, J ROSS, RR SADOULET, B SMITH, G STOCKWELL, W WHITE, S YOUNG, BA YVON, D AF SHUTT, T WANG, N ELLMAN, B GIRAUDHERAUD, Y STUBBS, C BARNES, PD CUMMINGS, A DASILVA, A EMES, J HALLER, EE LANGE, AE RICH, J ROSS, RR SADOULET, B SMITH, G STOCKWELL, W WHITE, S YOUNG, BA YVON, D TI SIMULTANEOUS HIGH-RESOLUTION MEASUREMENT OF PHONONS AND IONIZATION CREATED BY PARTICLE INTERACTIONS IN A 60G GERMANIUM CRYSTAL AT 25 MK SO PHYSICAL REVIEW LETTERS LA English DT Article AB We demonstrate simultaneous high energy resolution (rms almost-equal-to 800 eV) measurements of ionization and phonons created by particle interactions in a semiconductor crystal of macroscopic size (60 g germanium) at 25 mK. We present first studies of charge collection at biases below 1 V/cm, and find that, contrary to commonly held opinion, the full recoil energy of particle interactions is recovered as phonons when charge trapping is negligible. We also report an unanticipated correlation between charge collection and phonon energy at very low bias, and discuss this effect in terms of charge trapping. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. CENS,SERV PHYS PARTICULES,DEPT ASTROPHYS,F-91191 GIF SUR YVETTE,FRANCE. UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V6T 1Z1,BC,CANADA. COLL FRANCE,PHYS CORPUSCULAIRE LAB,F-75231 PARIS,FRANCE. RP SHUTT, T (reprint author), UNIV CALIF BERKELEY,CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720, USA. RI Stubbs, Christopher/C-2829-2012; Yvon, Dominique/D-2280-2015 OI Stubbs, Christopher/0000-0003-0347-1724; NR 13 TC 76 Z9 76 U1 0 U2 1 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 DEC 14 PY 1992 VL 69 IS 24 BP 3531 EP 3534 DI 10.1103/PhysRevLett.69.3531 PG 4 WC Physics, Multidisciplinary SC Physics GA KB857 UT WOS:A1992KB85700029 ER PT J AU TESANOVIC, Z XING, L BULAEVSKII, L LI, Q SUENAGA, M AF TESANOVIC, Z XING, L BULAEVSKII, L LI, Q SUENAGA, M TI CRITICAL FLUCTUATIONS IN THE THERMODYNAMICS OF QUASI-2-DIMENSIONAL TYPE-II SUPERCONDUCTORS SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; SINGLE-CRYSTAL YBA2CU3O7; MAGNETIC-FIELD; MECHANICAL MEASUREMENTS; PERTURBATION-SERIES; PHASE-TRANSITION; BEHAVIOR; BI2.2SR2CA0.8CU2O8; HC2 AB Thermodynamic quantities in quasi-2D type-II superconductors exhibit characteristic scaling behavior for high fields in the critical region around H(c2)(T). Using a nonperturbative approach to the Ginzburg-Landau free energy functional, the scaling functions for the free energy, magnetization, entropy, and specific heat are evaluated in a closed form. The experimental data for Bi2Sr2Ca2Cu3O10 are presented which are in agreement with the theoretical results. C1 MAX PLANCK INST SOLID STATE RES,HIGH FIELD MAGNET LAB,F-38042 GRENOBLE,FRANCE. BROOKHAVEN NATL LAB,DEPT MAT SCI,UPTON,NY 11973. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP TESANOVIC, Z (reprint author), JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,BALTIMORE,MD 21218, USA. NR 27 TC 223 Z9 223 U1 1 U2 3 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 DEC 14 PY 1992 VL 69 IS 24 BP 3563 EP 3566 DI 10.1103/PhysRevLett.69.3563 PG 4 WC Physics, Multidisciplinary SC Physics GA KB857 UT WOS:A1992KB85700037 ER PT J AU PADOWITZ, DF MERRY, WR JORDAN, RE HARRIS, CB AF PADOWITZ, DF MERRY, WR JORDAN, RE HARRIS, CB TI 2-PHOTON PHOTOEMISSION AS A PROBE OF ELECTRON INTERACTIONS WITH ATOMICALLY THIN DIELECTRIC FILMS ON METAL-SURFACES SO PHYSICAL REVIEW LETTERS LA English DT Article ID IMAGE-POTENTIAL STATES; INVERSE PHOTOEMISSION; SPECTROSCOPY; DEPENDENCE; ENERGY AB Electrons bound to a metal surface by the image potential are seen to persist in the presence of various adsorbates. A new two-photon photoemission spectrometer with high resolution and sensitivity permits precise measurement of adsorbate-induced changes in image state binding energy and dispersion. This provides a unique probe of electron interaction with thin dielectric films. Monolayer xenon on Ag(111) reduced the electron's effective mass. Spectra of alkane multilayers show rich structure with layer-by-layer shifts in binding energy. Bilayers gave evidence of electron localization. C1 LAWRENCE BERKELEY LAB, DIV CHEM SCI, BERKELEY, CA 94720 USA. RP PADOWITZ, DF (reprint author), UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA. NR 16 TC 98 Z9 98 U1 0 U2 9 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 DEC 14 PY 1992 VL 69 IS 24 BP 3583 EP 3586 DI 10.1103/PhysRevLett.69.3583 PG 4 WC Physics, Multidisciplinary SC Physics GA KB857 UT WOS:A1992KB85700042 ER PT J AU CHANNELL, PJ AF CHANNELL, PJ TI THE VLASOV EQUATION AND POISSON MAPS INDUCED BY NONSYMPLECTIC PARTICLE MAPS SO PHYSICS LETTERS A LA English DT Article ID INTEGRATION; SYSTEMS AB It is shown that almost symplectic particle maps induce Poisson maps of the truncated moment coordinatizations of solutions of the Vlasov equation, allowing one to use various tools to study the realistic evolution of distribution functions. RP CHANNELL, PJ (reprint author), LOS ALAMOS NATL LAB,MS-H829,LOS ALAMOS,NM 87545, USA. NR 20 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD DEC 14 PY 1992 VL 171 IS 5-6 BP 311 EP 316 DI 10.1016/0375-9601(92)90649-7 PG 6 WC Physics, Multidisciplinary SC Physics GA KD204 UT WOS:A1992KD20400015 ER PT J AU GRONBECHJENSEN, N KIVSHAR, YS AF GRONBECHJENSEN, N KIVSHAR, YS TI INVERTED KINKS IN AC DRIVEN DAMPED SINE-GORDON CHAINS SO PHYSICS LETTERS A LA English DT Article ID SYSTEM; DYNAMICS; EXCITATIONS; SOLITONS AB It is demonstrated that a sine-Gordon chain may support localized kink solitons, connecting two inverted ground states, if the system is driven by a large-amplitude ac force. This result is predicted by analytical arguments based on the method of averaging in fast oscillations and the results are confirmed by direct numerical simulations, showing excellent agreement with the theoretical predictions. C1 STANFORD UNIV,DEPT APPL PHYS,STANFORD,CA 94305. HEINRICH HEINE UNIV DUSSELDORF,INST THEORET PHYS 1,W-4000 DUSSELDORF 1,GERMANY. RP GRONBECHJENSEN, N (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 19 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD DEC 14 PY 1992 VL 171 IS 5-6 BP 338 EP 343 DI 10.1016/0375-9601(92)90654-5 PG 6 WC Physics, Multidisciplinary SC Physics GA KD204 UT WOS:A1992KD20400020 ER PT J AU KIELECZAWA, J DUNN, JJ STUDIER, FW AF KIELECZAWA, J DUNN, JJ STUDIER, FW TI DNA SEQUENCING BY PRIMER WALKING WITH STRINGS OF CONTIGUOUS HEXAMERS SO SCIENCE LA English DT Article ID SINGLE-STRANDED-DNA; BACTERIOPHAGE-T7 DNA; ESCHERICHIA-COLI; BINDING-PROTEIN; HYBRIDIZATION; POLYMERASE AB When template DNA is saturated with a single-stranded DNA binding protein (SSB), strings of three or four contiguous hexanucleotides (hexamers) can cooperate through base-stacking interactions to prime DNA synthesis specifically from the 3' end of the string. Under the same conditions, priming by individual hexamers is suppressed. Strings of three or four hexamers representing more than 200 of the 4096 possible hexamers primed easily readable sequence ladders at more than 75 different sites in single-stranded or denatured double-stranded templates 6.4 kilobases to 40 kilobase pairs long, with a success rate of 60 to 90 percent. A synthesis of 1 micromole of hexamer supplies enough material for thousands of primings, so multiple libraries of all 4096 hexamers could be distributed at a reasonable cost. Such libraries would allow rapid and economical sequencing. Automating this strategy could increase the speed and efficiency of large-scale DNA sequencing by at least an order of magnitude. RP KIELECZAWA, J (reprint author), BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973, USA. NR 19 TC 100 Z9 102 U1 0 U2 5 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD DEC 11 PY 1992 VL 258 IS 5089 BP 1787 EP 1791 DI 10.1126/science.1465615 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KB964 UT WOS:A1992KB96400037 PM 1465615 ER PT J AU KOGUT, A SMOOT, GF BENNETT, CL WRIGHT, EL AYMON, J DEAMICI, G HINSHAW, G JACKSON, PD KAITA, E KEEGSTRA, P LINEWEAVER, C LOEWENSTEIN, K ROKKE, L TENORIO, L BOGGESS, NW CHENG, ES GULKIS, S HAUSER, MG JANSSEN, MA KELSALL, T MATHER, JC MEYER, S MOSELEY, SH MURDOCK, TL SHAFER, RA SILVERBERG, RF WEISS, R WILKINSON, DT AF KOGUT, A SMOOT, GF BENNETT, CL WRIGHT, EL AYMON, J DEAMICI, G HINSHAW, G JACKSON, PD KAITA, E KEEGSTRA, P LINEWEAVER, C LOEWENSTEIN, K ROKKE, L TENORIO, L BOGGESS, NW CHENG, ES GULKIS, S HAUSER, MG JANSSEN, MA KELSALL, T MATHER, JC MEYER, S MOSELEY, SH MURDOCK, TL SHAFER, RA SILVERBERG, RF WEISS, R WILKINSON, DT TI COBE DIFFERENTIAL MICROWAVE RADIOMETERS - PRELIMINARY SYSTEMATIC-ERROR ANALYSIS SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMIC MICROWAVE BACKGROUND; ARTIFICIAL SATELLITES, SPACE PROBES; METHODS, STATISTICAL AB The Differential Microwave Radiometers (DMR) instrument aboard the Cosmic Background Explorer (COBE) maps the full microwave sky in order to measure the large-angular-scale anisotropy of the cosmic microwave background radiation. Solar system foreground sources, instrumental effects, as well as data recovery and processing, can combine to create statistically significant artifacts in the analyzed data. We discuss the techniques available for the identification and subtraction of these effects from the DMR data and present preliminary limits on their magnitude in the DMR 1 yr maps (Smoot et al. 1992). The largest effect is the instrument response to the Earth's magnetic field, which contributes up to 375 muK to the raw data in the worst channel. Emission from the Earth is weak (less than 47 muK in the raw data at 95% confidence). Residual uncertainties in the best DMR sky maps, after correcting-the raw data for systematic effects, are less than 6 muK for the pixel rms variation, less than 3 muK for the rms quadrupole amplitude of a spherical harmonic expansion, and less than 30 muK2 for the correlation function (all limits 95% confidence level). These limits are a factor of 5-40 lower than the level of anisotropy in the microwave background detected in the 1 yr DMR sky maps: 30 +/- 5 muK rms, 13 +/- 4 muK quadrupole, and 1194 +/- 499 muK2 for the correlation function (Smoot et al. 1992; Bennett et al. 1992b; Wright et al. 1992). C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. UNIV CALIF LOS ANGELES,DEPT ASTRON,LOS ANGELES,CA 90024. HUGHES STX CORP,LANHAM,MD 20706. JET PROP LAB,PASADENA,CA 91109. MIT,DEPT PHYS,CAMBRIDGE,MA 02139. GEN RES CORP,DANVERS,MA 01923. PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544. RP KOGUT, A (reprint author), NASA,GODDARD SPACE FLIGHT CTR,UNIV SPACE RES ASSOC,CODE 6859,GREENBELT,MD 20771, USA. RI Moseley, Harvey/D-5069-2012; Kogut, Alan/D-6293-2012; Rokke, Laurie/I-5642-2015 OI Rokke, Laurie/0000-0002-5696-7240 NR 16 TC 52 Z9 52 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 10 PY 1992 VL 401 IS 1 BP 1 EP 18 DI 10.1086/172033 PN 1 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KB243 UT WOS:A1992KB24300001 ER PT J AU DAVIES, MB BENZ, W HILLS, JG AF DAVIES, MB BENZ, W HILLS, JG TI STELLAR ENCOUNTERS INVOLVING NEUTRON-STARS IN GLOBULAR-CLUSTER CORES SO ASTROPHYSICAL JOURNAL LA English DT Article DE CELESTIAL MECHANICS, STELLAR DYNAMICS; GLOBULAR CLUSTERS, GENERAL; HYDRODYNAMICS; STARS, NEUTRON ID 3-DIMENSIONAL HYDRODYNAMICAL SIMULATIONS; DYNAMICAL PROPERTIES; OMEGA-CENTAURI; RED GIANTS; COLLISIONS; EVOLUTION; ANISOTROPY; BINARIES AB Encounters between a 1.4 M. neutron star and a 0.8 M. red giant and main-sequence star are simulated using a three-dimensional smoothed particle hydrodynamics (SPH) code. The rcd giant is modeled as a massive core surrounded by a gaseous envelope, while the main-sequence star is modeled as a polytrope of index n = 1.5. The neutron star is treated as a single particle. Encounters at various impact parameters and with relative velocities pertinent to globular clusters (10 km s-1) are studied. In the case of encounters involving a red giant, bound systems are produced when the separation at periastron passage R(MIN) less than or similar to 2.5R(RG). The effect of the encounter depends strongly on the impact parameter. For close encounters and physical collisions, a common envelope system is produced. After the envelope of gas has been removed, a tight binary comprising of a white dwarf (previously the red giant core) and the neutron star remains. The two stars will spiral toward each other, due to the emission of gravitational radiation, such that the white dwarf will fill its Roche lobe in less than a Hubble time. For more distant encounters (i.e., 1.8R(RG) less than or similar to R(MIN) less than or similar to 2.5R(RG)), a detached binary may be produced that will form an LMXB when the red giant further evolves and fills its Roche lobe. After mass transfer has ceased, such binaries will contain a millisecond pulsar (MSP). For main-sequence stars, an encounter with a neutron star will produce one of two distinct objects: close encounters and physical collisions (i.e., R(MIN) less than or similar to 1.75R(MS)) leave a single object with the neutron star engulfed in a thick disk while the rest of the encounters that produce bound systems (i.e., 1.75R(MS) less than or similar to R(MIN) less than or similar to 3.5R(MS)) may form detached binaries that later pass through an LMXB phase before, presumedly, producing a binary containing an MSP. The subsequent evolution of the thick disk systems is currently unclear. Possibly enough of the material will be accreted by the neutron star to produce a lone MSP. However, even if all these systems do produce MSPs, we still only obtain a factor of 2 increase in the expected ratio of MSPs to LMXBs, which is insufficient to have the standard model (where MSPs are produced from LMXBs) comply with observations. C1 UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP DAVIES, MB (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. NR 29 TC 48 Z9 48 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 10 PY 1992 VL 401 IS 1 BP 246 EP 259 DI 10.1086/172056 PN 1 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KB243 UT WOS:A1992KB24300024 ER PT J AU ROGERS, FJ IGLESIAS, CA AF ROGERS, FJ IGLESIAS, CA TI ROSSELAND MEAN OPACITIES FOR VARIABLE COMPOSITIONS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ATOMIC DATA; ATOMIC PROCESSES; STARS, INTERIORS ID SOLAR; STARS AB We have undertaken a long-term effort to provide improved Rosseland mean opacity tables. Our earlier work has shown that detailed atomic physics data is crucial to the accurate calculation of opacities. In particular, we showed that the inclusion of LS coupling in the configuration term structure can increase the opacity by factors of 3-4 over the Los Alamos results. Recently, we showed that the additional lines and the shifting of oscillator strength introduced by intermediate coupling can further increase the opacity by as much as 50%. In the present paper we present a method to expand our existing tables to include arbitrary values of hydrogen mass fraction. This task was greatly simplified by showing that there exists a correspondence in the equation of state and opacity for sets of mixtures with the same temperature and electron density, but different mass density and composition. Tables for mixtures of variable hydrogen and metal mass fractions as well as the metal constituents can now be readily calculated. RP ROGERS, FJ (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 38 TC 125 Z9 125 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD DEC 10 PY 1992 VL 401 IS 1 BP 361 EP 366 DI 10.1086/172066 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KB243 UT WOS:A1992KB24300034 ER PT J AU KOVNER, A ROSENSTEIN, B AF KOVNER, A ROSENSTEIN, B TI TOPOLOGICAL INTERPRETATION OF ELECTRIC CHARGE, DUALITY AND CONFINEMENT IN 2+1 DIMENSIONS SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article AB Electric charge in QED is topological in the sense that the electric current is a curl of a local gauge-invariant field - the dual electromagnetic field strength. In 2+1 dimensions it can be explicitly represented as the winding number in terms of a local field V describing the Nielsen-Olesen magnetic vortices: Q is-proportional-to integral d2xepsilon(ij)partial derivative(j)(V* partial derivative(i)V<-- -->). Electrically charged particles are then visualized as topological solitons of V corresponding to elements of the homotopy group pi1 (S1) = Z. The quantization of electric charge and the universality of the electromagnetic coupling are thus given a topological interpretation. The low energy physics is described by a ''dual'' Lagrangian written in terms of the field V only. This dual Lagrangian furnishes the Landau-Ginzburg description of the Coulomb-Higgs phase transition with V as a pertinent local order parameter. The symmetry which is associated with the phase transition is the magnetic flux symmetry. The nonzero VEV of V in the Coulomb phase breaks the magnetic flux spontaneously, leading to the appearance of a massless Goldstone boson - the photon. The vortex field V is also constructed in non-Abelian gauge theories. Here the solitons of V are identified with the ''constituent'' quarks. The dual Lagrangian contains explicit flux-symmetry-breaking terms. As a result the topological solitons (quarks) are linearly confined. We describe in detail the derivation of the dual Lagrangian and the topological mechanism of confinement in non-Abelian theories with adjoint and fundamental matter. The extension of the above description to the (3+1)-dimensional gauge theories is briefly discussed. Several notions are easily generalizable but the picture is far from being complete. RP KOVNER, A (reprint author), LOS ALAMOS NATL LAB,GRP T8,LOS ALAMOS,NM 87545, USA. NR 0 TC 37 Z9 38 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0217-751X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD DEC 10 PY 1992 VL 7 IS 30 BP 7419 EP 7514 DI 10.1142/S0217751X92003392 PG 96 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA KF152 UT WOS:A1992KF15200001 ER PT J AU ROSENWAKS, Y THACKER, BR AHRENKIEL, RK NOZIK, AJ AF ROSENWAKS, Y THACKER, BR AHRENKIEL, RK NOZIK, AJ TI ELECTRON-TRANSFER DYNAMICS AT P-GAAS/LIQUID INTERFACES SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Letter ID HOT CARRIER INJECTION; PHOTOLUMINESCENCE; JUNCTIONS; INP AB The rates of photoinduced electron transfer from sulfide-passivated p-GaAs to outer-sphere redox acceptors (ferricenium and cobalticinium) in acetonitrile have been measured using time-correlated single-photon-counting of photoluminescence decay. The characteristic time scales for electron transfer were found to be very fast, manifested by electron transfer velocities ranging from 2 X 10(5) to 10(6) cm/s at 1 mM concentrations. These rates are 4-5 orders of magnitude faster than predicted by other workers. C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 28 TC 42 Z9 42 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD DEC 10 PY 1992 VL 96 IS 25 BP 10096 EP 10098 DI 10.1021/j100204a004 PG 3 WC Chemistry, Physical SC Chemistry GA KC007 UT WOS:A1992KC00700004 ER PT J AU JUDSON, RS AF JUDSON, RS TI TEACHING POLYMERS TO FOLD SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Letter ID PROTEIN; PREDICTION AB A new method is presented for predicting folding pathways of polymers. The folding pathway is described as a generic program or sequence of logical steps of such a form that a computer can carry them out to produce a folded structure. A genetic algorithm (GA) is used to learn specific sequences or folding pathways that carry a denatured conformation into a target final conformation. The method is demonstrated on a model 2-dimensional polymer for which the global energy minimum is known. The GA learns a program that will fold a denatured polymer into its global energy minimum conformation. RP JUDSON, RS (reprint author), SANDIA NATL LABS,CTR COMPUTAT ENGN,LIVERMORE,CA 94551, USA. OI Judson, Richard/0000-0002-2348-9633 NR 29 TC 20 Z9 20 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD DEC 10 PY 1992 VL 96 IS 25 BP 10102 EP 10104 DI 10.1021/j100204a006 PG 3 WC Chemistry, Physical SC Chemistry GA KC007 UT WOS:A1992KC00700006 ER PT J AU LIN, Y JONAH, CD AF LIN, Y JONAH, CD TI DEPENDENCE OF THE BENZOPHENONE ANION SOLVATION ON SOLVENT STRUCTURE SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID OPTICAL-ABSORPTION SPECTRA; PULSE-RADIOLYSIS; LIQUID ALCOHOL; DYNAMICS; ELECTRONS; WATER; TIME; RESOLUTION AB The solvation of the benzophenone anion has been studied at room temperature using the pulse radiolytic pump-probe technique. The time-dependent benzophenone anion absorption spectra have been monitored in several different solvents ranging from linear alcohols to branched alcohols to acetonitrile. The maximum of the steady-state spectrum shifts to the red as the solvent is changed from linear alcohols to branched alcohols to acetonitrile. Computer Monte Carlo simulations indicate that the observed spectral shift can be assigned to the position and the orientation of the dipole functional group. The experimental dynamics of the anion solvation were also studied. By fitting the time-dependent absorption data to a multistate evolution kinetic model, the solvation time for these systems is obtained. RP LIN, Y (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. NR 28 TC 21 Z9 21 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD DEC 10 PY 1992 VL 96 IS 25 BP 10119 EP 10124 DI 10.1021/j100204a009 PG 6 WC Chemistry, Physical SC Chemistry GA KC007 UT WOS:A1992KC00700009 ER PT J AU WURZ, P LYKKE, KR AF WURZ, P LYKKE, KR TI MULTIPHOTON EXCITATION, DISSOCIATION, AND IONIZATION OF C-60 SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID CARBON CLUSTER IONS; THERMIONIC EMISSION; DELAYED IONIZATION; PHOTON IONIZATION; FULLERENES C60; SINGLE-PHOTON; BUCKMINSTERFULLERENE; C-60; C70; SURFACE AB We show that the interaction of intense laser light in the visible and UV wavelength range with gas-phase C60 leads to high internal excitation of the parent molecule, rather than direct multiphoton ionization. High internal energies (almost-equal-to 50 eV) are achieved by absorption of 10-20 photons and rapid conversion from electronic to vibrational excitation. Thus, direct ionization of C60 by multiphoton absorption is in strong competition with other processes, mainly delayed ionization and fragmentation. A wide fluence and wavelength range is investigated to map out the different parameters that characterize these processes. Both delayed ionization and fragmentation have these high internal excitations as common precursors. These processes are successfully modeled by quasi-equilibrium theory. The results of this study indicate for the first time that the majority of ionization for fullerenes results from thermionic electron emission, a process that takes place on the time scale of microseconds. C1 ARGONNE NATL LAB, DIV MAT SCI, 9700 S CASS AVE, ARGONNE, IL 60439 USA. ARGONNE NATL LAB, DIV CHEM, ARGONNE, IL 60439 USA. NR 54 TC 169 Z9 169 U1 1 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD DEC 10 PY 1992 VL 96 IS 25 BP 10129 EP 10139 DI 10.1021/j100204a011 PG 11 WC Chemistry, Physical SC Chemistry GA KC007 UT WOS:A1992KC00700011 ER PT J AU NICHOLAS, JB WINANS, RE HARRISON, RJ ITON, LE CURTISS, LA HOPFINGER, AJ AF NICHOLAS, JB WINANS, RE HARRISON, RJ ITON, LE CURTISS, LA HOPFINGER, AJ TI ABINITIO MOLECULAR-ORBITAL STUDY OF THE EFFECTS OF BASIS SET SIZE ON THE CALCULATED STRUCTURE AND ACIDITY OF HYDROXYL-GROUPS IN FRAMEWORK MOLECULAR-SIEVES SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID MECHANICAL POTENTIAL SURFACES; GAUSSIAN BASIS FUNCTIONS; ATOMIC BASIS SETS; FIRST-ROW ATOMS; FORCE-FIELD; ZEOLITES; CONTRACTION; SYSTEMS; SILICA; H3SIOH AB The structures, force constants, and relative acidities of a series of molecules that mimic the geometries of terminal and bridging hydroxyl groups in various substituted zeolites and clays are calculated by ab initio molecular orbital methods. The molecules are structural analogs of disiloxane H3T-O-TH3, and the protonated form H3T-OH-TH3, where T = Si, Al, B, and P. Also included are H3SiO- and H3SiOH that mimic terminal hydroxyl groups that occur at the zeolite surface and defect sites. Results are presented for restricted Hartree-Fock (RHF) calculations at levels of theory that range from the minimal RHF/STO-3G to double- and triple-zeta basis sets with multiple polarization functions. The study shows that the structures of the molecules converge toward limiting values at the higher levels of theory. The theoretical trend in acidity of the terminal and bridging hydroxyls, as determined by the proton affinity, the length of the O-H bond, the charge on the hydroxyl proton, and the O-H stretching force constants and frequencies, is presented and is in agreement with experimental determinations. The calculated proton affinity is also shown to depend on the basis set size; however, the acidity trend is well reproduced at all levels of theory except RHF/STO-3G. Force parameters suitable for use in classical mechanical simulations are presented for O-H and T-O bond stretches and T-O-T and T-OH-T angle bends that are key structural features for zeolites and clays. The coupled motion of the T-O bond and T-O-T angles is calculated and compared to proposed experimental relationships. The preferential sites for substitution of Si by Al or B in the zeolite framework are discussed in terms of changes in the related T-O bond lengths and T-O-T bond angles. C1 UNIV ILLINOIS,DEPT CHEM,CHICAGO,IL 60680. ARGONNE NATL LAB,DIV CHEM,COAL CHEM GRP,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM,THEORET CHEM GRP,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. NR 38 TC 96 Z9 98 U1 0 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD DEC 10 PY 1992 VL 96 IS 25 BP 10247 EP 10257 DI 10.1021/j100204a029 PG 11 WC Chemistry, Physical SC Chemistry GA KC007 UT WOS:A1992KC00700029 ER PT J AU FITZMAURICE, DJ FREI, H AF FITZMAURICE, DJ FREI, H TI PHOTOINDUCED OXYGEN-TRANSFER FROM NO2 TO ETHYLENE IN THE VICINITY OF THE NO2 DISSOCIATION THRESHOLD - A LASER PHOTOCHEMICAL STUDY ON REACTANT PAIRS ISOLATED IN SOLID ARGON SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID FLUORESCENCE EXCITATION SPECTRUM; IODIDE ACETYLENE COMPLEXES; ROTATIONALLY COOLED NO2; CROSSED MOLECULAR-BEAM; CRYOGENIC MATRIX; NITROGEN-DIOXIDE; BRANCHING RATIOS; ATOM REACTIONS; RED-LIGHT; OLEFINS AB The wavelength dependence of the photochemistry of C2H4.NO2 and C2D4.NO2 pairs, isolated in solid Ar, in the range 555-355 nm is reported. Continuous-wave and pulsed dye lasers were used to excite the reactants, and the products were monitored by FT infrared spectroscopy. Acetaldehyde, ethylene oxide, NO, and ethyl nitrite radical were the products observed at wavelengths longer than the 398-nm dissociation threshold of NO2. D isotope effects on the branching among these species derived from kinetic analysis of growth curves support our conclusion in previous work that the mechanism involves large-amplitude O transfer from NO2 to the C=C bond to yield a transient oxirane biradical. The latter acts as a common precursor of the observed products. A new species, ketene, appears at excitation energies just above the NO2 dissociation limit (385 and 355 nm). This product is assigned to a new path consisting of NO2 --> O(3P) + NO dissociation followed by O(3P) + ethylene addition. Comparison of product growth upon 385- and 420-nm excitation indicates that there is no abrupt change in total product yield, combined aldehyde and epoxide yield, or epoxide/aldehyde branching ratio as the photolysis photon energy is tuned through the 398-nm dissociation threshold. This suggests that large-amplitude O transfer continues to play a dominant role upon excitation of ethylene.NO2 collisional pairs even at wavelengths shorter than the NO2 --> O(3P) dissociation limit. C1 UNIV CALIF BERKELEY,CHEM BIODYNAM LAB,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 61 TC 24 Z9 24 U1 2 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD DEC 10 PY 1992 VL 96 IS 25 BP 10308 EP 10315 DI 10.1021/j100204a039 PG 8 WC Chemistry, Physical SC Chemistry GA KC007 UT WOS:A1992KC00700039 ER PT J AU YILDIRIM, T ZHOU, O FISCHER, JE BYKOVETZ, N STRONGIN, RA CICHY, MA SMITH, AB LIN, CL JELINEK, R AF YILDIRIM, T ZHOU, O FISCHER, JE BYKOVETZ, N STRONGIN, RA CICHY, MA SMITH, AB LIN, CL JELINEK, R TI INTERCALATION OF SODIUM HETEROCLUSTERS INTO THE C-60 LATTICE SO NATURE LA English DT Article ID TEMPERATURES AB INTERCALATION of sodium into C60 has been shown1 to yield a range of compounds NaxC60 (2 < x < 6). Unlike the other alkali-metal-doped compounds, there is no evidence of superconductivity within this range of doping. Furthermore, Na6C60 retains the face-centred-cubic (f.c.c.) structure of undoped C60 whereas the analogous x = 6 phases with K, Rb or Cs are body-centred cubic (b.c.c.)2. Here we report the preparation of sodium-doped C60 with x up to about 10; the structure remains f.c.c. throughout. Rietveld refinement of X-ray diffraction data yields a structure with ideal composition Na11C60, in which the octahedral interstitial site contains a nine-atom body-centred cluster of sodium atoms while the tetrahedral sites are singly occupied. Clusters of four to nine sodium atoms in the octahedral site provide sufficient 'chemical pressure' to prevent the low-temperature lattice distortion that occurs when this site is singly occupied, as in Na3C60 (ref. 1). This distortion is thought to suppress superconductivity in the latter compound. Thus we suggest that new sodium-doped superconducting phases may be found in the range 4 < x < 11. C1 TEMPLE UNIV,DEPT PHYS,PHILADELPHIA,PA 19122. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104. UNIV PENN,DEPT MAT SCI & ENGN,PHILADELPHIA,PA 19104. RP YILDIRIM, T (reprint author), UNIV PENN,RES STRUCT MATTER LAB,PHILADELPHIA,PA 19104, USA. RI yildirim, taner/A-1290-2009; Strongin, Robert/F-1026-2010 NR 13 TC 135 Z9 136 U1 2 U2 16 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD DEC 10 PY 1992 VL 360 IS 6404 BP 568 EP 571 DI 10.1038/360568a0 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KB959 UT WOS:A1992KB95900078 ER PT J AU HOFFERT, MI COVEY, C AF HOFFERT, MI COVEY, C TI DERIVING GLOBAL CLIMATE SENSITIVITY FROM PALEOCLIMATE RECONSTRUCTIONS SO NATURE LA English DT Article ID ICE-CORE RECORD; GREENHOUSE; MODEL; DUST AB To assess the future impact of anthropogenic greenhouse gases on global climate, we need a reliable estimate of the sensitivity of the Earth's climate to changes in radiative forcing. Climate sensitivity is conventionally defined as the equilibrium surface temperature increase for carbon dioxide doubling, DELTAT2x. Uncertainties in cloud processes spread general circulation model (GCM) estimates of this parameter over the range 1.5 < DELTAT2x < 4.5-degrees-C (refs 1, 2). An alternative to model-based estimates is in principle available from the reconstruction of past climates3-6, which implicitly includes cloud feedback. Here we retrieve the sensitivity of two palaeoclimates, one colder and one warmer than present, by independently reconstructing both the equilibrium surface temperature change and the radiative forcing. Our results yield DELTAT2x = 2.3 +/- 0.9-degrees-C. This range is comparable with estimates from GCMs and inferences from recent temperature observations and ocean models7,8. Future application of the method to additional climates in the geological record might constrain climate sensitivity enough to narrow the model uncertainties of global warming predictions. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP HOFFERT, MI (reprint author), NYU,DEPT APPL SCI,EARTH SYST GRP,NEW YORK,NY 10003, USA. NR 45 TC 116 Z9 119 U1 2 U2 17 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD DEC 10 PY 1992 VL 360 IS 6404 BP 573 EP 576 DI 10.1038/360573a0 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KB959 UT WOS:A1992KB95900080 ER PT J AU DRESSEL, M ELDRIDGE, JE WILLIAMS, JM WANG, HH AF DRESSEL, M ELDRIDGE, JE WILLIAMS, JM WANG, HH TI THE CORRELATION OF LATTICE PHONON FREQUENCIES WITH THE SUPERCONDUCTING TRANSITION-TEMPERATURES OF SOME (BEDT-TTF) SALTS SO PHYSICA C LA English DT Article ID PRESSURE ORGANIC SUPERCONDUCTOR; INFRARED OPTICAL-PROPERTIES; KAPPA-(BEDT-TTF)2CUBR; SPECTRA; 10-K; TC AB The far-infrared powder absorption spectra, between 10 cm-1 and 350 cm-1, of seven BEDT-TTF salts that exhibit superconductivity at or near ambient pressure, have been measured as a function of temperature, between 5 K and 300 K. The temperature dependences of the peak frequencies, along with the measured deuterium isotopic frequency shifts, separated the lattice from the internal modes. The frequencies of the observed lattice modes were found to increase with T(c) in the three kappa-phase salts in agreement with the reduced volume of the unit cell, and to have a mixed response in the three beta-phase compounds. Furthermore, the general range and magnitude of the frequencies in the higher-T(c) kappa-phase compounds were found to be larger than in the lower T(c) beta-phase compounds. Consequently, no evidence was found for a correlation between higher values of T(c) and a softer lattice in these organic superconductors. C1 UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V6T 1Z1,BC,CANADA. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RI Dressel, Martin/D-3244-2012 NR 25 TC 15 Z9 15 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD DEC 10 PY 1992 VL 203 IS 3-4 BP 247 EP 256 DI 10.1016/0921-4534(92)90030-G PG 10 WC Physics, Applied SC Physics GA KF123 UT WOS:A1992KF12300003 ER PT J AU BARTEL, J JOHNSON, MB SINGHAM, MK STOCKER, W AF BARTEL, J JOHNSON, MB SINGHAM, MK STOCKER, W TI PION INELASTIC-SCATTERING AND THE NEUTRON DENSITY IN SM-152 SO PHYSICS LETTERS B LA English DT Article ID CHARGE-EXCHANGE SCATTERING; ELASTIC-SCATTERING; CALCIUM ISOTOPES; EFFECTIVE FORCES; NUCLEI; DEFORMATIONS; DEPENDENCE; RESONANCE; PROTON AB We apply a microscopic coupled-channel theory of pion elastic and inelastic scattering to study the neutron and proton densities of deformed Sm-152 obtained from a Hartree-Fock + BCS calculation with the Skyrme SkM* interaction. The approach utilizes a second-order pion-nucleus optical potential which has been determined from a previous phenomenological study of elastic and charge-exchange data on spherical nuclei. We obtain an excellent representation of the 180 MeV pi+ data. The pi- data are not quite as well reproduced, suggesting that the radius of the neutrons in Sm-152 is smaller than the one predicted by our SkM* Hartree-Fock theory. However, we find the deformation of the neutrons and protons as given by the Hartree-Fock theory (beta2n = 0.263, beta2p = 0.287) to be consistent with the experimental data. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP BARTEL, J (reprint author), UNIV LOUIS PASTEUR,BP 20,F-67037 STRASBOURG,FRANCE. NR 18 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD DEC 10 PY 1992 VL 296 IS 1-2 BP 5 EP 10 DI 10.1016/0370-2693(92)90795-6 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KC545 UT WOS:A1992KC54500002 ER PT J AU HOREN, DJ AUBLE, RL DELCAMPO, JG VARNER, RL BEENE, JR SATCHLER, GR LUND, B BROWN, VR ANTHONY, PL MADSEN, VA AF HOREN, DJ AUBLE, RL DELCAMPO, JG VARNER, RL BEENE, JR SATCHLER, GR LUND, B BROWN, VR ANTHONY, PL MADSEN, VA TI DIFFERENT EFFECTS OF VALENCE NEUTRONS ON THE ISOSPIN CHARACTER OF TRANSITIONS TO THE 1ST 2+ AND 3- STATES OF ZR-90, ZR-92, ZR-94, ZR-96 SO PHYSICS LETTERS B LA English DT Article ID GIANT QUADRUPOLE-RESONANCE; EVEN-EVEN NUCLIDES; SCATTERING; EXCITATION; ISOTOPES; PB-208; SN-118; ZR AB We have used the Zr-90, Zr-92, Zr-94, Zr-96(Li-6, Li-6) reaction at E = 70 MeV to deduce the ratio of M(n)/M(p) for transactions to the first 2+ and 3- excited states. For the first 2+ state, we find M(n)/M(p) increases from less than N/Z to greater than N/Z going from Zr-90 to Zr-96. However, for the 3- state we find that M(n)/M(p) is significantly smaller than N/Z for all four isotopes, a result which is in sharp disagreement with previous work. We find that our measured values of M(n)/M(p) are well reproduced by random-phase-approximation calculations including pairing. C1 YALE UNIV,DEPT PHYS,NEW HAVEN,CT 06511. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. OREGON STATE UNIV,DEPT PHYS,CORVALLIS,OR 97331. JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831. RP HOREN, DJ (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 21 TC 6 Z9 6 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 DEC 10 PY 1992 VL 296 IS 1-2 BP 18 EP 22 DI 10.1016/0370-2693(92)90797-8 PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KC545 UT WOS:A1992KC54500004 ER PT J AU GAILLARD, MK XIU, RL AF GAILLARD, MK XIU, RL TI ANALYSIS OF RUNNING COUPLING-CONSTANT UNIFICATION IN STRING THEORY SO PHYSICS LETTERS B LA English DT Article ID SUPERSYMMETRY BREAKING; GAUGINO CONDENSATION; DUALITY; ELECTROWEAK; MODELS AB We use recently obtained two-loop string coupling constants to analyze a class of string models based on orbifold compactification. Assuming weak coupling at the string scale m(s) and single-scale unification leads to restrictions on the spectrum of massive (M(Z) much less than M less-than-or-equal-to m(s)) matter supermultiplets and/or on the Kac-Moody algebra level. C1 LAWRENCE BERKELEY LAB,DIV PHYS,BERKELEY,CA 94720. RP GAILLARD, MK (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 29 TC 39 Z9 39 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 DEC 10 PY 1992 VL 296 IS 1-2 BP 71 EP 76 DI 10.1016/0370-2693(92)90805-E PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KC545 UT WOS:A1992KC54500012 ER PT J AU BERGSHOEFF, E SEVRIN, A SHEN, X AF BERGSHOEFF, E SEVRIN, A SHEN, X TI A DERIVATION OF THE BRST OPERATOR FOR NONCRITICAL W-STRINGS SO PHYSICS LETTERS B LA English DT Article ID GAUGE-THEORIES; FEYNMAN-RULES; QUANTIZATION; ALGEBRA; SUPERGRAVITY; FORMALISM; SYMMETRY AB We derive the recently proposed BRST charge for non-critical W strings from a lagrangian approach. The basic observation is that, despite appearances, the combination of two classical "matter" and "Toda" w3 systems leads to a closed modified gauge algebra, which is of the so-called soft type. Based on these observations, a novel way to construct critical w3 strings is given. C1 LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DEPT PHYS,BERKELEY,CA 94720. CERN,DIV THEORY,CH-1211 GENEVA 23,SWITZERLAND. RP BERGSHOEFF, E (reprint author), UNIV GRONINGEN,INST THEORET PHYS,NIJENBORGH 4,9747 AG GRONINGEN,NETHERLANDS. RI Sevrin, Alexander/D-5794-2017 OI Sevrin, Alexander/0000-0001-6564-9941 NR 33 TC 29 Z9 29 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 DEC 10 PY 1992 VL 296 IS 1-2 BP 95 EP 103 DI 10.1016/0370-2693(92)90808-H PG 9 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KC545 UT WOS:A1992KC54500015 ER PT J AU WARD, BFL AF WARD, BFL TI RENORMALIZED Z(0) REST MASS - GAUGE-INVARIANCE SO PHYSICS LETTERS B LA English DT Article ID SYMMETRIES AB The properly renormalized Z0 rest mass is shown to be gauge invariant in the rigorous complete on-shell renormalization scheme. Thus, the mass measured at LEP/SLC is indeed a physical observable and can be used as a basic parameter of SU2L X U1 theory, as indeed it has so been. C1 CERN,DIV TH,CH-1211 GENEVA 23,SWITZERLAND. SLAC,STANFORD,CA 94309. INT CTR THEORET PHYS,I-34014 TRIESTE,ITALY. RP WARD, BFL (reprint author), UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996, USA. NR 16 TC 2 Z9 2 U1 0 U2 1 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 DEC 10 PY 1992 VL 296 IS 1-2 BP 209 EP 212 DI 10.1016/0370-2693(92)90828-R PG 4 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KC545 UT WOS:A1992KC54500035 ER PT J AU AKESSON, T ALMEHED, S ANGELIS, ALS ARMENISE, N ATHERTON, H AUBRY, P BARTELS, HW BEAUDOIN, G BEAULIEU, JM BEKER, H BENARY, O BETTONI, D BISI, V BLEVIS, I BOGGILD, H CLELAND, W CLEMEN, M COLLICK, B CORRIVEAU, F DAGAN, S DEDERICHS, K UOMO, SD DEPOMMIER, P DEVENISH, RCE DILIBERTO, S DIGIACOMO, N DODD, JR DOLGOSHEIN, B DREES, A ENYO, H ERLANDSSON, B ESTEN, MJ FABJAN, CW FISCHER, P FRAENKEL, Z GAIDOT, A GIBRATDEBU, F GIUBELLINO, P GLASSEL, P GOERLACH, U HAGLUND, R HAMEL, LA VANHECKE, H HEDBERG, V HEIFETZ, R HOLSCHER, A JACAK, B JARLSKOG, G JOHANSSON, S KRANER, H KROH, V LAMARCHE, F LEROY, C LISSAUER, D LONDON, G LORSTAD, B LOUNIS, A MARTELLI, F MASERA, M MARZARICHIESA, A MAZZONI, MA MAZZUCATO, E MCCUBBIN, ML MCCUBBIN, NA MCGAUGHEY, P MEDDI, F MJORNMARK, U MUCIACCIA, MT MURAVIEV, S MURRAY, M NEUBERT, M NILSSON, S OLSEN, L OREN, Y PANSART, JP PARK, YM PFEIFFER, A PIUZ, F POLYCHRONAKOS, V POULARD, G PRICE, M RAHM, D RAMELLO, L RICCATI, L ROMANO, G ROSA, G SANDOR, L SCHUKRAFT, J SEKIMOTO, M SELLDEN, B SEMAN, M SHMELEVA, A SIDOROV, V SIMONE, S SIROIS, Y SLETTEN, H SMIRNOV, S SOLTANI, J SONDHEIM, W SPECHT, HJ STERN, E STUMER, I SUNIER, J TCHERNIATIN, V THODBERG, HH THOMPSON, J TIKHOMIROV, V TSERRUYA, I VASSEUR, G VEENHOF, R WIGMANS, R YEPES, P AF AKESSON, T ALMEHED, S ANGELIS, ALS ARMENISE, N ATHERTON, H AUBRY, P BARTELS, HW BEAUDOIN, G BEAULIEU, JM BEKER, H BENARY, O BETTONI, D BISI, V BLEVIS, I BOGGILD, H CLELAND, W CLEMEN, M COLLICK, B CORRIVEAU, F DAGAN, S DEDERICHS, K UOMO, SD DEPOMMIER, P DEVENISH, RCE DILIBERTO, S DIGIACOMO, N DODD, JR DOLGOSHEIN, B DREES, A ENYO, H ERLANDSSON, B ESTEN, MJ FABJAN, CW FISCHER, P FRAENKEL, Z GAIDOT, A GIBRATDEBU, F GIUBELLINO, P GLASSEL, P GOERLACH, U HAGLUND, R HAMEL, LA VANHECKE, H HEDBERG, V HEIFETZ, R HOLSCHER, A JACAK, B JARLSKOG, G JOHANSSON, S KRANER, H KROH, V LAMARCHE, F LEROY, C LISSAUER, D LONDON, G LORSTAD, B LOUNIS, A MARTELLI, F MASERA, M MARZARICHIESA, A MAZZONI, MA MAZZUCATO, E MCCUBBIN, ML MCCUBBIN, NA MCGAUGHEY, P MEDDI, F MJORNMARK, U MUCIACCIA, MT MURAVIEV, S MURRAY, M NEUBERT, M NILSSON, S OLSEN, L OREN, Y PANSART, JP PARK, YM PFEIFFER, A PIUZ, F POLYCHRONAKOS, V POULARD, G PRICE, M RAHM, D RAMELLO, L RICCATI, L ROMANO, G ROSA, G SANDOR, L SCHUKRAFT, J SEKIMOTO, M SELLDEN, B SEMAN, M SHMELEVA, A SIDOROV, V SIMONE, S SIROIS, Y SLETTEN, H SMIRNOV, S SOLTANI, J SONDHEIM, W SPECHT, HJ STERN, E STUMER, I SUNIER, J TCHERNIATIN, V THODBERG, HH THOMPSON, J TIKHOMIROV, V TSERRUYA, I VASSEUR, G VEENHOF, R WIGMANS, R YEPES, P TI KAON PRODUCTION IN 200-GEV/NUCLEON NUCLEUS NUCLEUS COLLISIONS SO PHYSICS LETTERS B LA English DT Article ID INTERSECTING STORAGE-RINGS; QUARK-GLUON PLASMA; MOMENTUM CHARGED PIONS; INCLUSIVE PRODUCTION; SPECTRA; SIGNATURE; X=0 AB Results from the HELIOS External Spectrometer on kaon production in 200 GeV/A S+W and p+W collisions are presented. The K/pi ratios are compared with results from a lower beam energy and are found to be remarkably similar. Evidence for secondary production of K+ by meson-baryon rescattering is reviewed. Our results at y = 1.0-1.5 are compared with neutral particle results at midrapidity. C1 UNIV STOCKHOLM,S-10691 STOCKHOLM,SWEDEN. UNIV LONDON UNIV COLL,LONDON WC1E 6BT,ENGLAND. UNIV BARI,I-70126 BARI,ITALY. UNIV MONTREAL,MONTREAL H3C 3J7,QUEBEC,CANADA. UNIV HEIDELBERG,W-6900 HEIDELBERG,GERMANY. TEL AVIV UNIV,IL-69978 TEL AVIV,ISRAEL. UNIV TURIN,I-10125 TURIN,ITALY. WEIZMANN INST SCI,IL-76100 REHOVOT,ISRAEL. UNIV PITTSBURGH,PITTSBURGH,PA 15260. MCGILL UNIV,MONTREAL H3A 2T5,QUEBEC,CANADA. UNIV ROME,I-00100 ROME,ITALY. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. UNIV LUND,S-22101 LUND,SWEDEN. BROOKHAVEN NATL LAB,UPTON,NY 11973. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV SALERNO,I-84100 SALERNO,ITALY. INFN,I-70126 BARI,ITALY. INFN,I-10125 TURIN,ITALY. INFN,ROME,ITALY. PHYS ENGN INST MOSCOW,MOSCOW 115409,USSR. CEN SACLAY,DPHPE,F-91191 GIF SUR YVETTE,FRANCE. LEBEDEV PHYS INST,MOSCOW 117924,USSR. INFN,I-84100 SALERNO,ITALY. INST NUCL PHYS,NOVOSIBIRSK 670090,USSR. RP AKESSON, T (reprint author), CERN,CH-1211 GENEVA 23,SWITZERLAND. RI Ramello, Luciano/F-9357-2013; Tikhomirov, Vladimir/M-6194-2015; Shmeleva, Alevtina/M-6199-2015; Smirnov, Sergei/F-1014-2011; Martelli, Filippo/P-4041-2015; Masera, Massimo/J-4313-2012 OI Tikhomirov, Vladimir/0000-0002-9634-0581; Smirnov, Sergei/0000-0002-6778-073X; Martelli, Filippo/0000-0003-3761-8616; Simone, Saverio/0000-0003-3631-8398; Masera, Massimo/0000-0003-1880-5467; NR 14 TC 10 Z9 10 U1 0 U2 2 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 DEC 10 PY 1992 VL 296 IS 1-2 BP 273 EP 278 DI 10.1016/0370-2693(92)90839-V PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA KC545 UT WOS:A1992KC54500046 ER PT J AU AGRAWAL, A HABIBI, HR AGRAWAL, RK CRONIN, JP ROBERTS, DM CARONPOPOWICH, R LAMPERT, CM AF AGRAWAL, A HABIBI, HR AGRAWAL, RK CRONIN, JP ROBERTS, DM CARONPOPOWICH, R LAMPERT, CM TI EFFECT OF DEPOSITION PRESSURE ON THE MICROSTRUCTURE AND ELECTROCHROMIC PROPERTIES OF ELECTRON-BEAM-EVAPORATED NICKEL-OXIDE FILMS SO THIN SOLID FILMS LA English DT Article ID SPECTROSCOPY AB Electron-beam-evaporated nickel oxide films were shown to have a microcrystalline cubic nickel oxide structure. The pressure in the chamber during the film deposition has a large effect on the crystal size and the stoichiometry of the films. The redox currents, the efficiency of these films to color, and their optical properties were influenced by the processing conditions employed and the resulting microstructure. A model is proposed based on the observed microstructure that explains the source of overstoichiometric oxygen and ion transport in these films. C1 LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720. DONNELLY CORP,HOLLAND,MI 49423. RP AGRAWAL, A (reprint author), DONNELLY CORP,CTR ADV TECHNOL,4545 E FORT LOWELL RD,TUCSON,AZ 85712, USA. NR 29 TC 89 Z9 91 U1 1 U2 10 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0040-6090 J9 THIN SOLID FILMS JI Thin Solid Films PD DEC 10 PY 1992 VL 221 IS 1-2 BP 239 EP 253 DI 10.1016/0040-6090(92)90822-S PG 15 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA KD611 UT WOS:A1992KD61100038 ER PT J AU BIGNOZZI, CA ARGAZZI, R SCHOONOVER, JR GORDON, KC DYER, RB SCANDOLA, F AF BIGNOZZI, CA ARGAZZI, R SCHOONOVER, JR GORDON, KC DYER, RB SCANDOLA, F TI ELECTRONIC COUPLING IN CYANO-BRIDGED RUTHENIUM POLYPYRIDINE COMPLEXES AND ROLE OF ELECTRONIC EFFECTS ON CYANIDE STRETCHING FREQUENCIES SO INORGANIC CHEMISTRY LA English DT Article ID EXCITED-STATE PROPERTIES; POLYNUCLEAR COMPLEXES; PHOTOPHYSICAL PROPERTIES; INTERVALENCE-TRANSFER; TRANSFER TRANSITIONS; ENERGY AB The spectroscopic and electrochemical properties of a series of polynuclear complexes containing cyano-bridged ruthenium polypyridine units are consistent with a valence-localized model. In all the Ru(II) forms, the lowest metal-to-ligand charge-transfer (MLCT) states are localized on N-bonded moieties. The photophysical properties at 298 and 77 K indicate that efficient intercomponent energy-transfer processes from C-bonded to N-bonded chromophoric units take place. The mixed-valence forms of these complexes show low-energy absorption bands which are assigned to metal-to-metal charge-transfer transitions involving C-bonded Ru(II) and N-bonded Ru(III) centers. The resonance Raman spectrum of [NC-RuII(bpy)2-CN-RuIII(bpy)2-CN]2+ under near-resonance conditions with the Ru(II) --> Ru(III) charge-transfer band shows enhancement of the bridging cyanide stretching as expected for this type of electronic transition. In the infrared spectra the number of cyanide stretching bands supports the valence-localized model. For the representative [NC-RuII(bpy)2-CN-RuIII(bpy)2-CN]2+ complex, three CN stretches (one bridging, two terminal) are observed. Time-resolved infrared measurements for the MLCT excited state of [NC-RuII(bpy)2-CN-RuII(bpy)2-CN]+ are reported. The excited-state IR spectrum shows features similar to those of the chemically prepared mixed-valence dimer, [NC-RuII(bpy)2-CN-RuIII(bpy)2-CN]2+, strongly suggesting that valence delocalization is not significant in the excited state. The electronic factors affecting the frequency of the bridging cyanide are analyzed by examining the behavior of the mixed-valence ions [M-NC-M'(bpy)2-CN-M]6+/4+ and [NC-M'(bpy)2-CN-M]3+/2+ (M = [Ru(NH3)5]2+/3+; M' = Ru(II), Os(II), Re(I)). C1 UNIV N CAROLINA, DEPT CHEM, CHAPEL HILL, NC 27599 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. RP BIGNOZZI, CA (reprint author), UNIV FERRARA, CNR, CTR FOTOCHIM, DIPARTIMENTO CHIM, I-44100 FERRARA, ITALY. RI Gordon, Keith/B-7149-2008; Argazzi, Roberto/C-4819-2015; OI Argazzi, Roberto/0000-0002-2619-6860; Bignozzi, Carlo Alberto/0000-0002-7882-3694; Gordon, Keith/0000-0003-2833-6166 NR 39 TC 156 Z9 156 U1 3 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0020-1669 EI 1520-510X J9 INORG CHEM JI Inorg. Chem. PD DEC 9 PY 1992 VL 31 IS 25 BP 5260 EP 5267 DI 10.1021/ic00051a018 PG 8 WC Chemistry, Inorganic & Nuclear SC Chemistry GA KC422 UT WOS:A1992KC42200018 ER PT J AU NGUYENTRUNG, C BEGUN, GM PALMER, DA AF NGUYENTRUNG, C BEGUN, GM PALMER, DA TI AQUEOUS URANIUM COMPLEXES .2. RAMAN-SPECTROSCOPIC STUDY OF THE COMPLEX-FORMATION OF THE DIOXOURANIUM(VI) ION WITH A VARIETY OF INORGANIC AND ORGANIC-LIGANDS SO INORGANIC CHEMISTRY LA English DT Article ID METAL CARBONATE EQUILIBRIA; X-RAY-DIFFRACTION; URANYL CARBONATE; NITRATE; 25-DEGREES-C; PERCHLORATE; UO2(CO3)34; CHLORIDE; SPECTRA; SYSTEMS AB The Raman spectra of the aqueous dioxouranium(VI) ion have been measured as a function of ligand and uranyl concentrations at various constant pH values. The ligands investigated were F-, Cl-, Br-, SO42-, HSO4-, NO3-, ClO4-, CH3CO2-, and C2O42-. A linear correlation between the frequency of the O=U=O symmetrical stretching vibration (nu1, cm-1) and the average number nBAR of ligands coordinated equatorially to the central uranium atom in the given species has been established for the above-mentioned ligands according to the following equation: nu1 (cm-1) = -AnBAR + 870, where A is a characteristic coefficient (cm-1) representing the shift in the nu1 band for the addition of each ligand to the uranyl(VI) center relative to 870 cm-1 for UO22+(aq). Except for the case Of ClO4- (A = -1 5 cm-1), the values of A are positive and vary in the range 0-15. The preceding equation was derived earlier for OH-anions with A = 21.5 +/- 1.0 cm-1. Results obtained elsewhere for CO32- also fit this equation with A = 19.0 +/- 1.0 cm-1. This linear correlation provides a convenient, nondestructive method of identifying the possible stoichiometry of uranyl(VI) complexes in solution and a means for estimating their stability fields with respect to ligand concentration and pH. These results suggest that complex formation with these ligands leads to the weakening of the uranium-axial oxygen bonds in the following order: OH- > CO32- > C2O42- > F- > SO42-, CH3CO2- > Cl- > Br-, NO3-, ClO4-, HSO4-. This order reflects the decrease in the overall stability constants (log beta) of these complexes. Three linear correlations between log beta(n) and the shift in the vibration energy (DELTAnu1) between UO22+ and the given species (UO2Ln; n = 1-3) have been established. C1 OAK RIDGE NATL LAB, DIV CHEM, BLDG 4500S, POB 2008, OAK RIDGE, TN 37831 USA. RP OAK RIDGE NATL LAB, DIV CHEM, BLDG 4500S, POB 2008, OAK RIDGE, TN 37831 USA. NR 92 TC 144 Z9 144 U1 5 U2 40 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0020-1669 EI 1520-510X J9 INORG CHEM JI Inorg. Chem. PD DEC 9 PY 1992 VL 31 IS 25 BP 5280 EP 5287 DI 10.1021/ic00051a021 PG 8 WC Chemistry, Inorganic & Nuclear SC Chemistry GA KC422 UT WOS:A1992KC42200021 ER PT J AU FAZLURRAHMAN, AK VERKADE, JG AF FAZLURRAHMAN, AK VERKADE, JG TI SYNTHESIS, REACTIONS, AND P-31 NMR ANALYSIS OF (DIPHOSPHINE)PLATINUM DITHIOLATES SO INORGANIC CHEMISTRY LA English DT Article ID THIOLATE COMPLEXES; TRANSITION; MONOLAYERS; PARAMETERS; CHEMISTRY; RUTHENIUM; PALLADIUM; CENTERS; CRYSTAL AB The reaction between (diphosphine)PtCl2 (diphosphine = dppm, dppe, dppp, dppb, dcpe, depe) and bifunctional thiols (1,2-ethanedithiol, 1,3-propanedithiol, 1,2-benzenedithiol) in acetone or CH2Cl2 gives the corresponding dithiolate complexes (1-18) in the presence of a base. These thiolato complexes have been isolated as crystalline solids in 57-88% yields and were characterized by H-1, C-13, and P-31 NMR spectroscopy. The P-31 chemical shifts of these complexes are dependent on both the nature of the diphosphine and the chelating nature of the dithiolato ligand. Treatment of (depe)Pt(SC6H4-o-S) (15) and the analogous dcpe complex (18) with 1 equiv of MeI, allyl chloride, or Me3OBF4 gave the corresponding sulfur-monoalkylated product. Reaction of Cr(nbd)(CO)4 with (depe)PtSC6H4-o-S (15) gave (depe)Pt(SC6H4-o-S)(Cr(CO), (22) in 64% yield. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP VERKADE, JG (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011, USA. NR 49 TC 30 Z9 30 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD DEC 9 PY 1992 VL 31 IS 25 BP 5331 EP 5335 DI 10.1021/ic00051a027 PG 5 WC Chemistry, Inorganic & Nuclear SC Chemistry GA KC422 UT WOS:A1992KC42200027 ER PT J AU MILLER, DJ SENGUPTA, S HETTINGER, JD SHI, D GRAY, KE NASH, AS GORETTA, KC AF MILLER, DJ SENGUPTA, S HETTINGER, JD SHI, D GRAY, KE NASH, AS GORETTA, KC TI FLUX PINNING IN HOT ISOSTATICALLY PRESSED BI2SR2CACU2OX SO APPLIED PHYSICS LETTERS LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; CA-CU-O; CRITICAL CURRENTS; CURRENT-DENSITY; SYSTEM AB Magnetic hysteresis data were taken from 4.2 to 35 K on Bi2Sr2CaCu2Ox samples that were hot isostatically pressed at 105 MPa in an inert atmosphere at 825-degrees-C. One set of samples was pressed for only 15 min while the other was pressed for 120 min. The samples pressed for 15 min contained a high density of dislocations and planar faults, while the samples pressed for 120 min contained fewer dislocations and faults, with most dislocations present within subgrain boundaries. The samples with the complex dislocation/planar fault structures exhibited substantially larger hysteresis loops, suggesting enhanced flux pinning. C1 MARQUETTE UNIV,DEPT ELECT & COMP ENGN,MILWAUKEE,WI 53233. ARGONNE NATL LAB,DIV MAT COMPONENTS TECHNOL,ARGONNE,IL 60439. RP MILLER, DJ (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 20 TC 25 Z9 25 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD DEC 7 PY 1992 VL 61 IS 23 BP 2823 EP 2825 DI 10.1063/1.108049 PG 3 WC Physics, Applied SC Physics GA KB238 UT WOS:A1992KB23800029 ER PT J AU KUILA, D SCHOONOVER, JR DYER, RB BATIE, CJ BALLOU, DP FEE, JA WOODRUFF, WH AF KUILA, D SCHOONOVER, JR DYER, RB BATIE, CJ BALLOU, DP FEE, JA WOODRUFF, WH TI RESONANCE RAMAN STUDIES OF RIESKE-TYPE PROTEINS SO BIOCHIMICA ET BIOPHYSICA ACTA LA English DT Article DE IRON-SULFUR PROTEIN; IRON-SULFUR CLUSTER; RESONANCE RAMAN SPECTROSCOPY; RIESKE-TYPE CLUSTER ID RED PARAMAGNETIC PROTEIN; IRON-SULFUR PROTEINS; 2FE-2S CLUSTER; SPINACH FERREDOXIN; CLOSTRIDIUM-PASTEURIANUM; PHTHALATE DIOXYGENASE; PSEUDOMONAS-CEPACIA; ANALOG COMPLEXES; BLUE COPPER; SPECTRA AB Resonance Raman (RR) spectra are reported for the [2Fe-2S] Rieske protein from Thermus thermophilus (TRP) and phthalate dioxygenase from Pseudomonas cepacia (PDO) as a function of pH and excitation wavelength. Depolarization ratio measurements are presented for the RR spectra of spinach ferredoxin (SFD), TRP, and PDO at 74 K. By comparison with previously published RR spectra of SFD, we suggest reasonable assignments for the spectra of TRP and PDO. The spectra of PDO exhibit virtually no pH dependence, while significant changes are observed in TRP spectra upon raising the pH from 7.3 to 10.1. One band near 270 cm-1, which consists of components at 266 cm-1 and 274 cm-1, is attributed to Fe(III)-N(His) stretching motions. We suggest that these two components arise from conformers having a protonated-hydrogen-bonded imidazole (266 cm-1) and deprotonated-hydrogen-bonded imidazolate (274 cm-1) coordinated to the Fe/S cluster and that the relative populations of the two species are pH-dependent; a simple structural model is proposed to account for this behavior in the respiratory-type Rieske proteins. In addition, we have identified RR peaks associated with the bridging and terminal sulfur atoms of the Fe-S-N cluster. The RR excitation profiles of peaks associated with these atoms are indistinguishable from each other in TRP (pH 7.3) and PDO and differ greatly from those of [2Fe-2S] ferredoxins. The profiles are bimodal with maxima near 490 nm and > approx. 550 nm. By contrast, bands associated with the Fe-N stretch show a somewhat different enhancement profile. Upon reduction, RR peaks assigned to Fe-N vibrations are no longer observed, with the resulting spectrum being remarkably similar to that reported for reduced adrenodoxin. This indicates that only modes associated with Fe-S bonds are observed and supports the idea that the reducing electron resides on the iron atom coordinated to the two histidine residues. Taken as a whole, the data are consistent with an S2tFeS2bFe[N(His)]2t structure for the Rieske-type cluster. C1 LOS ALAMOS NATL LAB,ISOTOPE & STRUCT CHEM DIV,BIOCHEM & SPECT GRP,LOS ALAMOS,NM 87544. UNIV MICHIGAN,DEPT BIOL CHEM,ANN ARBOR,MI 48109. RI dballou@umich.edu, David/A-1298-2007 FU NIDDK NIH HHS [DK36263]; NIGMS NIH HHS [GM35342, GM20877] NR 37 TC 60 Z9 60 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0006-3002 J9 BIOCHIM BIOPHYS ACTA PD DEC 7 PY 1992 VL 1140 IS 2 BP 175 EP 183 DI 10.1016/0005-2728(92)90007-O PG 9 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA KB908 UT WOS:A1992KB90800007 PM 1280165 ER PT J AU KIM, S SANDUSKY, P BOWLBY, NR AEBERSOLD, R GREEN, BR VLAHAKIS, S YOCUM, CF PICHERSKY, E AF KIM, S SANDUSKY, P BOWLBY, NR AEBERSOLD, R GREEN, BR VLAHAKIS, S YOCUM, CF PICHERSKY, E TI CHARACTERIZATION OF A SPINACH PSBS CDNA-ENCODING THE 22 KDA PROTEIN OF PHOTOSYSTEM-II SO FEBS LETTERS LA English DT Article DE PHOTOSYSTEM-II; POLYPEPTIDE; CHLOROPHYLL-A/B-BINDING (CAB) PROTEIN; GENE EVOLUTION ID A/B-BINDING PROTEINS; REACTION CENTER CORE; CAB POLYPEPTIDES; GENES; TOMATO; COMPLEX; CP29 AB An intrinsic 22 kDa polypeptide is found associated with the oxygen-evolving photosystem II (PSII) core complex in all green plants and cyanobacteria so far examined. although it does not appear to be required for oxygen evolution. Amino acid sequence information obtained from the purified 22 kDa protein was used to construct a probe that was employed to isolate a full-length cDNA clone encoding the 274-residue precursor of the 22 kDa protein. Hydropathy plot analysis predicts the existence of four membrane-spanning helices in the mature protein. The two halves of the approximately 200-residue mature protein show high sequence similarity to each other, suggesting that the psbS gene arose from an internal gene duplication. The 22 kDa protein has some sequence similarity to chlorophyll a/b-binding proteins. C1 UNIV MICHIGAN,DEPT BIOL,ANN ARBOR,MI 48109. MICHIGAN STATE UNIV,MSU DOE PLANT RES LAB,E LANSING,MI 48824. UNIV BRITISH COLUMBIA,BIOMED RES CTR,VANCOUVER V6T 1W5,BC,CANADA. UNIV BRITISH COLUMBIA,DEPT BIOCHEM,VANCOUVER V6T 1W5,BC,CANADA. UNIV BRITISH COLUMBIA,DEPT BOT,VANCOUVER V6T 1W5,BC,CANADA. UNIV MICHIGAN,PROT & CARBOHYDRATE STRUCT FACIL,ANN ARBOR,MI 48109. NR 23 TC 76 Z9 79 U1 2 U2 17 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0014-5793 J9 FEBS LETT JI FEBS Lett. PD DEC 7 PY 1992 VL 314 IS 1 BP 67 EP 71 DI 10.1016/0014-5793(92)81463-V PG 5 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA KB081 UT WOS:A1992KB08100018 PM 1451805 ER PT J AU BOIS, FY COMPTONQUINTANA, PJE AF BOIS, FY COMPTONQUINTANA, PJE TI SENSITIVITY ANALYSIS OF A NEW MODEL OF CARCINOGENESIS SO JOURNAL OF THEORETICAL BIOLOGY LA English DT Article ID COLORECTAL CARCINOMAS; MITOTIC RECOMBINATION; MULTISTAGE MODEL; RISK ASSESSMENT; DNA DAMAGE; PROBABILISTIC MODEL; TRANSGENIC MICE; 2-STAGE MODEL; ALLELE LOSS; CANCER RP BOIS, FY (reprint author), LAWRENCE BERKELEY LAB,INDOOR ENVIRONM PROGRAM,MAIL STOP 90-3058,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. RI Bois, Frederic/E-9241-2012 OI Bois, Frederic/0000-0002-4154-0391 FU NCI NIH HHS [CA39910]; NIEHS NIH HHS [ES04705] NR 65 TC 4 Z9 4 U1 0 U2 2 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-5193 J9 J THEOR BIOL JI J. Theor. Biol. PD DEC 7 PY 1992 VL 159 IS 3 BP 361 EP 375 DI 10.1016/S0022-5193(05)80730-1 PG 15 WC Biology; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology GA KH229 UT WOS:A1992KH22900007 PM 1296096 ER PT J AU LEI, J PEARCE, EM KWEI, TK HAMILTON, WA SMITH, GS KWEI, GH AF LEI, J PEARCE, EM KWEI, TK HAMILTON, WA SMITH, GS KWEI, GH TI HYDROGEN-BONDED POLYMER BLENDS - THE INFLUENCE OF ANNEALING ON THE INTERFACE COMPOSITION OF THIN-FILMS SO MACROMOLECULES LA English DT Article ID MISCIBILITY; CONFORMATION; BULK AB The interface compositions, before and after annealing, of hydrogen-bonded polymer blends have been investigated by neutron reflectivity. The polymer blends under this study are the blends of deuterated poly(methyl methacrylate) (d-PMMA) and poly(styrene-co-vinylphenol) (MPS), which contains 5, 10, or 15 mol% vinylphenol monomer units, and the blends d-MPS (5%)/poly(butyl methacrylate) and d-MPS (5%)/PMMA. In the formation of blends, the excess volume of mixing was found to be negative for blends of MPS (5%) but positive for blends of MPS (10%) and MPS (15%). The volumes of all blends are decreased by annealing. The concentrations of MPS at both interfaces, air/polymer and polymer/substrate, tended to increase after annealing for all blends except the blend MPS (5%)/d-PMMA which showed a significant extent of composition changes. C1 POLYTECH INST NEW YORK,POLYMER RES INST,BROOKLYN,NY 11201. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 25 TC 1 Z9 1 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD DEC 7 PY 1992 VL 25 IS 25 BP 6770 EP 6774 PG 5 WC Polymer Science SC Polymer Science GA KB785 UT WOS:A1992KB78500008 ER PT J AU GOLDMAN, T NIETO, MM SANDBERG, VD AF GOLDMAN, T NIETO, MM SANDBERG, VD TI KAONS, QUANTUM-MECHANICS, AND GRAVITY SO MODERN PHYSICS LETTERS A LA English DT Article AB We provide a heuristic study of the effect of an anomalous tensor gravity on the quantum mechanical interferences available in the propagation of kaons. We find that, although the effects are generally very small, in principle they could be measured in some experimental situations. We comment on the effects of possible new vector and scalar symmetry partners of the gravitational potential. RP GOLDMAN, T (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0217-7323 J9 MOD PHYS LETT A JI Mod. Phys. Lett. A PD DEC 7 PY 1992 VL 7 IS 37 BP 3455 EP 3463 DI 10.1142/S021773239200286X PG 9 WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical SC Physics GA KC521 UT WOS:A1992KC52100003 ER PT J AU LIDEN, F CEDERWALL, B AHONEN, P BANES, DW FANT, B GASCON, J HILDINGSSON, L JOHNSON, A JUUTINEN, S KIRWAN, A LOVE, DJG MITARAI, S MUKAI, J NELSON, AH NYBERG, J SIMPSON, J WYSS, R AF LIDEN, F CEDERWALL, B AHONEN, P BANES, DW FANT, B GASCON, J HILDINGSSON, L JOHNSON, A JUUTINEN, S KIRWAN, A LOVE, DJG MITARAI, S MUKAI, J NELSON, AH NYBERG, J SIMPSON, J WYSS, R TI ALIGNMENT PROCESSES IN CS-119, CS-121 AND CS-123 SO NUCLEAR PHYSICS A LA English DT Article DE CD-106(F-19,XN2P); EF=95MEV; MO-92(S-34,XN3P); (S-34,XN-ALPHA-P); ES=150; 155MEV; MO-92(S-32,3P); (S-32,P-ALPHA; E=145MEV; MEASURED E-GAMMA; I-GAMMA-GAMMA-SIGMA(E-GAMMA,TAU; (PARTICLE)GAMMA-GAMMA-COIN; CS-119, CS-121, CS-123 DEDUCED LEVELS; J-PI; BAND STRUCTURE EXPERIMENTAL ROUTHIANS; ALIGNED ANGULAR MOMENTA; ENRICHED TARGETS; ARRAY OF COMPTON-SUPPRESSED HYPERPURE GE DETECTORS; 4-PI ARRAY OF PLASTIC PHOSWICH CHARGED-PARTICLE DETECTORS; 4-PI BISMUTH-GERMANATE BALL; NEUTRON-DETECTOR ARRAY; 4-PI ARRAY OF SI CHARGED-PARTICLE DETECTORS; BAND-HEAD; TOTAL-ROUTHIAN-SURFACE CALCULATIONS ID ESCAPE SUPPRESSED SPECTROMETER; MASS CS NUCLEI; COLLECTIVE PROPERTIES; BAND STRUCTURES; MULTIPLICITY FILTER; NEUTRON; PROTON; IDENTIFICATION; SPECTROSCOPY; PERFORMANCE AB Rotational band structures have been observed in the odd-A Cs isotopes 119Cs, 121Cs and 123Cs. The previously known bands have been extended to higher spin values and several new bands have been established. Alignments of both h11/2 protons and neutrons are seen. Of special interest are the alignment frequencies in the (tentative) [422]3/2+ and [404]9/2+ bands which indicate a configuration-dependent proton pairing. Furthermore, the variation of the interaction strength at the first band crossing in the h11/2 bands does not follow the standard cranked-shell-model predictions. This feature is in line with previous systematic observations of alignment processes in high-j intruder bands, and might infer an additional band mixing due to a neutron-proton interaction.(~)[GRAPHICS] C1 MANNE SIEGBAHN INST PHYS,S-10405 STOCKHOLM,SWEDEN. UNIV JYVASKYLA,DEPT PHYS,SF-40100 JYVASKYLA,FINLAND. SERC,DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND. NIELS BOHR INST,DK-4000 ROSKILDE,DENMARK. UNIV HELSINKI,DEPT PHYS,SF-00170 HELSINKI 17,FINLAND. UNIV LIVERPOOL,OLIVER LODGE LAB,LIVERPOOL L69 3BX,ENGLAND. KYUSHU UNIV 33,DEPT PHYS,FUKUOKA 812,JAPAN. UNIV UPPSALA,SVEDBERG LAB,S-75121 UPPSALA,SWEDEN. OAK RIDGE NATL LAB,JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831. ROYAL INST TECHNOL,DEPT PHYS 1,S-10044 STOCKHOLM 70,SWEDEN. RP LIDEN, F (reprint author), UNIV MANCHESTER,SCHUSTER LAB,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND. RI Cederwall, Bo/M-3337-2014 OI Cederwall, Bo/0000-0003-1771-2656 NR 37 TC 34 Z9 34 U1 0 U2 2 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 DEC 7 PY 1992 VL 550 IS 2 BP 365 EP 390 DI 10.1016/0375-9474(92)90687-F PG 26 WC Physics, Nuclear SC Physics GA KD111 UT WOS:A1992KD11100009 ER PT J AU DAI, J LIU, J AF DAI, J LIU, J TI SUPERSYMMETRY-INDUCED NONOBLIQUE RADIATIVE-CORRECTIONS TO ATOMIC PARITY VIOLATION SO NUCLEAR PHYSICS B LA English DT Article ID WEAK NEUTRAL CURRENTS; PHYSICS; NONCONSERVATION; CESIUM AB We calculate supersymmetry-induced, non-oblique radiative corrections to cesium parity-violation experiments. With the current limits on the masses of the superpartners, these corrections are typically of the order of 10(-3), relative to the tree level and may be detectable with the improved accuracy of the experiments. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP DAI, J (reprint author), RUTGERS STATE UNIV,DEPT PHYS & ASTRON,PISCATAWAY,NJ 08855, USA. NR 17 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD DEC 7 PY 1992 VL 387 IS 3 BP 562 EP 575 DI 10.1016/0550-3213(92)90206-Q PG 14 WC Physics, Particles & Fields SC Physics GA KF729 UT WOS:A1992KF72900002 ER PT J AU HAN, T VALENCIA, G WILLENBROCK, S AF HAN, T VALENCIA, G WILLENBROCK, S TI STRUCTURE-FUNCTION APPROACH TO VECTOR-BOSON SCATTERING IN PP COLLISIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID EFFECTIVE W-APPROXIMATION; ALPHA-S CALCULATION; HIGGS BOSONS; RADIATIVE-CORRECTIONS; ORDER; FUSION; QCD AB We discuss weak-vector-boson scattering, at next-to-leading order in QCD, within the framework of hadronic structure functions. We use this approach to calculate the Higgs-boson production cross section via vector-boson fusion at the CERN Large Hadron Collider and the Superconducting Super Collider; we find a modest increase over the leading-order prediction. We also give expressions for the distribution of vector bosons in a proton (effective-W approximation) including O(alpha(s)) corrections. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP HAN, T (reprint author), FERMI NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 30 TC 163 Z9 163 U1 0 U2 0 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 DEC 7 PY 1992 VL 69 IS 23 BP 3274 EP 3277 DI 10.1103/PhysRevLett.69.3274 PG 4 WC Physics, Multidisciplinary SC Physics GA KB203 UT WOS:A1992KB20300002 ER PT J AU CHEN, D ALBUQUERQUE, IF BAUBLIS, VV BONDAR, NF CARRIGAN, RA COOPER, PS DAI, LS DENISOV, AS DOBROVOLSKY, AV DUBBS, T ENDLER, AMF ESCOBAR, CO FOUCHER, M GOLOVTSOV, VL GORITCHEV, PA GOTTSCHALK, H GOUFFON, P GRACHEV, VT KHANZADEEV, AV KUBANTSEV, MA KUROPATKIN, NP LACH, J LANG, PF LEBEDENKO, VN LI, CZ LI, YS MAHON, JRP MCCLIMENT, E MORELOS, A NEWSOM, C MAIA, MCP SAMSONOV, VM SCHEGELSKY, VA SHI, HZ SMITH, VJ SUN, CR FUKUN, T TERENTYEV, NK TIMM, S TKATCH, II UVAROV, LN VOROBYOV, AA YAN, J ZHAO, WH ZHENG, SC ZHONG, YY AF CHEN, D ALBUQUERQUE, IF BAUBLIS, VV BONDAR, NF CARRIGAN, RA COOPER, PS DAI, LS DENISOV, AS DOBROVOLSKY, AV DUBBS, T ENDLER, AMF ESCOBAR, CO FOUCHER, M GOLOVTSOV, VL GORITCHEV, PA GOTTSCHALK, H GOUFFON, P GRACHEV, VT KHANZADEEV, AV KUBANTSEV, MA KUROPATKIN, NP LACH, J LANG, PF LEBEDENKO, VN LI, CZ LI, YS MAHON, JRP MCCLIMENT, E MORELOS, A NEWSOM, C MAIA, MCP SAMSONOV, VM SCHEGELSKY, VA SHI, HZ SMITH, VJ SUN, CR FUKUN, T TERENTYEV, NK TIMM, S TKATCH, II UVAROV, LN VOROBYOV, AA YAN, J ZHAO, WH ZHENG, SC ZHONG, YY TI UST OBSERVATION OF MAGNETIC-MOMENT PRECESSION OF CHANNELED PARTICLES IN BENT CRYSTALS SO PHYSICAL REVIEW LETTERS LA English DT Article ID BEAM AB Spin precession of channeled particles in bent crystals has been observed for the first time. Polarized SIGMA+ were channeled using bent Si crystals. These crystals provided an effective magnetic field of 45 T which resulted in a measured spin precession of 60-degrees +/- 17-degrees. This agrees with the prediction of 62-degrees +/- 2-degrees using the world average of SIGMA+ magnetic moment measurements. This new technique gives a SIGMA+ magnetic moment of (2.40 +/- 0.46 +/- 0.40),mu(N), where the quoted uncertainties are statistical and systematic, respectively. We see no evidence of depolarization in the channeling process. C1 INST HIGH ENERGY PHYS,BEIJING,PEOPLES R CHINA. UNIV BRISTOL,HH WILLS PHYS LAB,BRISTOL BS8 1TL,AVON,ENGLAND. CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213. FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV IOWA,IOWA CITY,IA 52242. MOSCOW THEORET & EXPTL PHYS INST,MOSCOW,USSR. SUNY ALBANY,ALBANY,NY 12222. CTR BRASILEIRO PESQUISAS FIS,BR-20000 RIO JANEIRO,BRAZIL. CONSELHO NACL PESQUISAS CNPQ,RIO JANEIRO,BRAZIL. YALE UNIV,JW GIBBS LAB,NEW HAVEN,CT 06520. RP CHEN, D (reprint author), PETERSBURG NUCL PHYS INST,GATCHINA,USSR. RI Albuquerque, Ivone/H-4645-2012; Gouffon, Philippe/I-4549-2012 OI Albuquerque, Ivone/0000-0001-7328-0136; Gouffon, Philippe/0000-0001-7511-4115 NR 17 TC 31 Z9 31 U1 0 U2 0 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 DEC 7 PY 1992 VL 69 IS 23 BP 3286 EP 3289 DI 10.1103/PhysRevLett.69.3286 PG 4 WC Physics, Multidisciplinary SC Physics GA KB203 UT WOS:A1992KB20300005 ER PT J AU SCHLAGEL, TJ KAHANA, SH PANG, Y AF SCHLAGEL, TJ KAHANA, SH PANG, Y TI FORWARD PROTONS AND NUCLEAR TRANSPARENCY IN RELATIVISTIC HEAVY-ION INTERACTIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID COLLISIONS AB The relativistic cascade code ARC is applied to data from the experiment E814 covering projectile rapidities in Si + Pb collisions at 14.6 GeV/c per nucleon. The result is a quantitative theoretical description of the entire range of the experimental rapidity spectrum, as well as of the number and transverse energy dependence of "punchthrough" protons. This plus additional detailed comparisons of transverse mass distributions strongly suggest the cascade approach can be highly useful for understanding energetic ion collisions. RP SCHLAGEL, TJ (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 12 TC 40 Z9 40 U1 0 U2 0 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 DEC 7 PY 1992 VL 69 IS 23 BP 3290 EP 3293 DI 10.1103/PhysRevLett.69.3290 PG 4 WC Physics, Multidisciplinary SC Physics GA KB203 UT WOS:A1992KB20300006 ER PT J AU OCKO, BM HELGESEN, G SCHARDT, B WANG, J HAMELIN, A AF OCKO, BM HELGESEN, G SCHARDT, B WANG, J HAMELIN, A TI CHARGE INDUCED (1X3) RECONSTRUCTION OF THE AU(110) SURFACE - AN X-RAY-SCATTERING STUDY SO PHYSICAL REVIEW LETTERS LA English DT Article ID SCANNING TUNNELING MICROSCOPY; ELECTROCHEMICAL-CELL; AQUEOUS-SOLUTION; GOLD SURFACES; DIFFRACTION; STABILITY; GEOMETRY; AG(110) AB In situ x-ray scattering studies of the Au(110) electrode surface have been carried out in 0.1 M NaF, NaCl, NaBr, LiCl, CsCl, and HClO4 solutions under potential control. At sufficiently negative potentials, in the salt solutions the surface forms a (1 x 3) reconstruction rather than a (1 x 2) reported for the clean vacuum surface. Above a critical threshold potential, the (1 x 3) reconstruction vanishes and the surface forms a (1 x 1) structure. C1 CNRS,ELECTROCHIM INTERFACIALE LAB,F-92195 MEUDON,FRANCE. RP OCKO, BM (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. RI Wang, Jia/B-6346-2011 NR 27 TC 65 Z9 65 U1 1 U2 5 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 DEC 7 PY 1992 VL 69 IS 23 BP 3350 EP 3353 DI 10.1103/PhysRevLett.69.3350 PG 4 WC Physics, Multidisciplinary SC Physics GA KB203 UT WOS:A1992KB20300021 ER PT J AU KWOK, WK FLESHLER, S WELP, U VINOKUR, VM DOWNEY, J CRABTREE, GW MILLER, MM AF KWOK, WK FLESHLER, S WELP, U VINOKUR, VM DOWNEY, J CRABTREE, GW MILLER, MM TI VORTEX LATTICE MELTING IN UNTWINNED AND TWINNED SINGLE-CRYSTALS OF YBA2CU3O7-DELTA SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TC SUPERCONDUCTORS; THERMAL FLUCTUATIONS; PHASE-TRANSITIONS; FLUX; CREEP AB The melting transition in twinned and in twinned single crystals is measured resistively in fields up to 8 T as a function of the angle between the c axis and the a-b plane. The angular dependence follows the Lindemann criterion with c(L) = 0.15. The suppression of melting by strong pinning by twin boundaries is demonstrated. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. USN,RES LAB,WASHINGTON,DC 20375. RP KWOK, WK (reprint author), ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439, USA. NR 20 TC 372 Z9 372 U1 1 U2 6 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 DEC 7 PY 1992 VL 69 IS 23 BP 3370 EP 3373 DI 10.1103/PhysRevLett.69.3370 PG 4 WC Physics, Multidisciplinary SC Physics GA KB203 UT WOS:A1992KB20300026 ER PT J AU REHR, JJ ALBERS, RC ZABINSKY, SI AF REHR, JJ ALBERS, RC ZABINSKY, SI TI HIGH-ORDER MULTIPLE-SCATTERING CALCULATIONS OF X-RAY-ABSORPTION FINE-STRUCTURE SO PHYSICAL REVIEW LETTERS LA English DT Article ID NEAR-EDGE STRUCTURE; CURVED-WAVE; SPECTRA; MOLECULES; EXAFS; XANES AB High-order scattering is found to be essential for the convergence of the multiple-scattering (MS) theory of x-ray-absorption fine structure, both in the near-edge and the extended regimes. These contributions are calculated using an ab initio curved-wave scattering-matrix formalism. Convergence to full MS accuracy is demonstrated for fcc Cu, as well as for molecular O2 and N2, where our approach provides a high-order MS interpretation of the sigma* shape resonances. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87544. RP REHR, JJ (reprint author), UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195, USA. NR 32 TC 1127 Z9 1130 U1 4 U2 53 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 DEC 7 PY 1992 VL 69 IS 23 BP 3397 EP 3400 DI 10.1103/PhysRevLett.69.3397 PG 4 WC Physics, Multidisciplinary SC Physics GA KB203 UT WOS:A1992KB20300033 ER PT J AU BLYTH, RIR JOYCE, JJ ARKO, AJ AF BLYTH, RIR JOYCE, JJ ARKO, AJ TI EVIDENCE OF A KONDO SCALE FROM THE TEMPERATURE-DEPENDENCE OF INVERSE PHOTOEMISSION SPECTROSCOPY OF CEPD3 - COMMENT SO PHYSICAL REVIEW LETTERS LA English DT Letter RP BLYTH, RIR (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 5 TC 8 Z9 8 U1 1 U2 1 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 DEC 7 PY 1992 VL 69 IS 23 BP 3418 EP 3418 DI 10.1103/PhysRevLett.69.3418 PG 1 WC Physics, Multidisciplinary SC Physics GA KB203 UT WOS:A1992KB20300039 ER PT J AU JACOBSON, SC FELINGER, A GUIOCHON, G AF JACOBSON, SC FELINGER, A GUIOCHON, G TI OPTIMIZING THE SAMPLE-SIZE AND THE RETENTION PARAMETERS TO ACHIEVE MAXIMUM PRODUCTION-RATES FOR ENANTIOMERS IN CHIRAL CHROMATOGRAPHY SO BIOTECHNOLOGY AND BIOENGINEERING LA English DT Article DE CHIRAL SEPARATIONS; OPTIMIZATION; CHROMATOGRAPHY, PREPARATIVE; PRODUCTION RATE ID PROTEIN STATIONARY PHASES; BOVINE SERUM-ALBUMIN; LIQUID-CHROMATOGRAPHY; SEPARATION; BAND; PROPAGATION; RESOLUTION; SIMULATION; ISOTHERM; SERIES AB The optimum experimental conditions (sample size and mobile phase composition) are calculated for maximum production rate of either one of two enantiomers contained in feeds of different compositions (1/1, 1/10, and 10/1). The products are obtained at 99% purity. The calculations use the equilibrium-dispersive model of chromatography and the equilibrium isotherms determined experimentally from the rear, diffuse boundary of overloaded elution profiles. The production rate measured experimentally under the optimum conditions calculated agree within 4% of the calculated values. There is an optimum value for the retention factor which is higher than predicted by a model assuming constant separation factor, because both separation factor and retention decrease with increasing organic solvent concentration in the mobile phase. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831. RI Felinger, Attila/A-1595-2008 OI Felinger, Attila/0000-0001-7130-1968 NR 19 TC 11 Z9 11 U1 0 U2 1 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0006-3592 J9 BIOTECHNOL BIOENG JI Biotechnol. Bioeng. PD DEC 5 PY 1992 VL 40 IS 10 BP 1210 EP 1217 DI 10.1002/bit.260401011 PG 8 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA JX836 UT WOS:A1992JX83600010 PM 18601073 ER PT J AU OGATA, CM GORDON, PF DEVOS, AM KIM, SH AF OGATA, CM GORDON, PF DEVOS, AM KIM, SH TI CRYSTAL-STRUCTURE OF A SWEET TASTING PROTEIN THAUMATIN-I, AT 1.65 ANGSTROM RESOLUTION SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE SWEET PROTEIN; THAUMATIN; CHEMICAL SENSES; SENSORY PERCEPTION; SWEET TASTE ID AMINO-ACID-SEQUENCE; GLOBULAR-PROTEINS; DIOSCOREOPHYLLUM-CUMMINSII; SECONDARY STRUCTURE; BINDING PROTEIN; PURIFICATION; REFINEMENT; MONELLIN; RECOGNITION; EXPRESSION C1 LAWRENCE BERKELEY LAB, DEPT CHEM, BERKELEY, CA 94720 USA. COLUMBIA UNIV, HOWARD HUGHES MED INST, DEPT BIOCHEM & MOLEC BIOPHYS, NEW YORK, NY 10032 USA. LAWRENCE BERKELEY LAB, DEPT CELLULAR & MOLEC BIOL, BERKELEY, CA 94720 USA. GENETECH INC, DEPT PROT ENGN, S SAN FRANCISCO, CA 94080 USA. NR 62 TC 104 Z9 107 U1 3 U2 5 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD DEC 5 PY 1992 VL 228 IS 3 BP 893 EP 908 DI 10.1016/0022-2836(92)90873-I PG 16 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KD721 UT WOS:A1992KD72100017 PM 1469722 ER PT J AU CHEN, LX BOWMAN, MK THURNAUER, MC LYTLE, FW NORRIS, JR AF CHEN, LX BOWMAN, MK THURNAUER, MC LYTLE, FW NORRIS, JR TI MOLECULAR-STRUCTURE OF NICKELCYCLOPENTADIENYLNITROSYL IN CONDENSED PHASES STUDIED BY EXAFS SO CHEMICAL PHYSICS LETTERS LA English DT Article ID ABSORPTION FINE-STRUCTURE; STRUCTURE SPECTROSCOPY; ABINITIO CALCULATIONS; AMPLITUDE AB The molecular structure of nickelcyclopentadienylnitrosyl (NiCpNO) in hexane liquid solution and in polystyrene film has been studied by EXAFS. EXAFS parameters from reference compounds and from theoretical calculations which assume normal, single scattering for NiCpNO EXAFS data analysis failed to fit the experimental data. This fact indicates a strong forward focusing effect in NiCpNO due to a linear or nearly linear configuration of -Ni-N-O. In such a case, multiple scattering must be included in the data analysis. Curve fittings with structural parameters derived from reference compounds with a similar linear configuration have given satisfactory agreement and reasonable distances between Ni and other atoms in the molecule. The Ni-N, Ni-C and Ni-O distances are determined to be 1.65, 2.16 and 2.77 angstrom, respectively. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. BOEING CO,SEATTLE,WA 98124. RI Bowman, Michael/F-4265-2011 OI Bowman, Michael/0000-0003-3464-9409 NR 14 TC 3 Z9 3 U1 0 U2 0 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 DEC 4 PY 1992 VL 200 IS 3 BP 290 EP 296 DI 10.1016/0009-2614(92)80013-2 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KA529 UT WOS:A1992KA52900013 ER PT J AU JACOBY, GC WILLIAMS, PL BUCKLEY, BM AF JACOBY, GC WILLIAMS, PL BUCKLEY, BM TI TREE-RING CORRELATION BETWEEN PREHISTORIC LANDSLIDES AND ABRUPT TECTONIC EVENTS IN SEATTLE, WASHINGTON SO SCIENCE LA English DT Article AB Radiocarbon ages of submerged trees on landslide deposits in Lake Washington, Seattle, indicate that the most recent slides in three separate areas may have occurred simultaneously about 1000 years ago. Tree ring crossdating shows that seven bark-bearing trees from one of these recent slides and a tree 23 kilometers to the northwest in a probable tsunami deposit on the shore of Puget Sound died in the same season of the same year. The close coincidence among the most recent lake landslides, a probable tsunami, abrupt subsidence, and other possible seismic events gives evidence for a strong prehistoric earthquake in the Seattle region. C1 LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720. RP JACOBY, GC (reprint author), COLUMBIA UNIV,LAMONT DOHERTY GEOL OBSERV,TREE RING LAB,PALISADES,NY 10964, USA. NR 16 TC 56 Z9 58 U1 1 U2 6 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD DEC 4 PY 1992 VL 258 IS 5088 BP 1621 EP 1623 DI 10.1126/science.258.5088.1621 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KA896 UT WOS:A1992KA89600027 PM 17742529 ER PT J AU DORALE, JA GONZALEZ, LA REAGAN, MK PICKETT, DA MURRELL, MT BAKER, RG AF DORALE, JA GONZALEZ, LA REAGAN, MK PICKETT, DA MURRELL, MT BAKER, RG TI A HIGH-RESOLUTION RECORD OF HOLOCENE CLIMATE CHANGE IN SPELEOTHEM CALCITE FROM COLD WATER CAVE, NORTHEAST IOWA SO SCIENCE LA English DT Article ID ISOTOPIC COMPOSITION; SYSTEMATICS; CALIBRATION; CARBONATE; DEPOSITS; TIME; TH AB High-precision uranium-thorium mass spectrometric chronology and O-18-C-13 isotopic analysis of speleothem calcite from Cold Water Cave in northeast lowa have been used to chart mid-Holocene climate change. Significant shifts in deltaO-18 and deltaC-13 isotopic values coincide with well-documented Holocene vegetation changes. Temperature estimates based on O-18/O-16 ratios suggest that the climate warmed rapidly by about 3-degrees-C at 5900 years before present and then cooled by 4-degrees-C at 3600 years before present. Initiation of a gradual increase in deltaC-13 at 5900 years before present suggests that turnover of the forest soil biomass was slow and that equilibrium with prairie vegetation was not attained by 3600 years before present. C1 UNIV IOWA, DEPT GEOL, IOWA CITY, IA 52242 USA. UNIV IOWA, CTR GLOBAL & REG ENVIRONM RES, IOWA CITY, IA 52242 USA. LOS ALAMOS NATL LAB, ISOTOPE SCI GRP, LOS ALAMOS, NM 87545 USA. RI Gonzalez, Luis/D-5476-2011 OI Gonzalez, Luis/0000-0001-7600-8306 NR 41 TC 186 Z9 212 U1 1 U2 27 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 EI 1095-9203 J9 SCIENCE JI Science PD DEC 4 PY 1992 VL 258 IS 5088 BP 1626 EP 1630 DI 10.1126/science.258.5088.1626 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KA896 UT WOS:A1992KA89600029 PM 17742531 ER EF