FN Thomson Reuters Web of Science™ VR 1.0 PT J AU PAZIRANDEH, M CAMPBELL, JR AF PAZIRANDEH, M CAMPBELL, JR TI PROTEIN-COMPOSITION OF RHAPIDOSOMES ISOLATED FROM AQUASPIRILLUM-ITERSONII SO JOURNAL OF GENERAL MICROBIOLOGY LA English DT Article AB Rhapidosomes are tubular microstructures composed of proteins that are found in a variety of bacteria and algae. These structures, which are resistant to disruption by many denaturing agents, have potential application as a biomaterial and may serve as a new model for the study of self assembly. When rhapidosomes were purified and analysed by SDS-PAGE the presence of three proteins with molecular masses of 53, 29 and 18 kDa was revealed. However, lysozyme treatment of the rhapidosome preparations containing the three proteins resulted in the selective release of the 18 kDa protein from the rhapidosome complex. N-Terminal sequence analysis and amino acid composition analysis were performed on all three proteins. The amino acid composition of the 18 kDa protein closely matched the amino acid composition of protein H (a peptidoglycan-associated protein from Pseudomonas aeruginosa). These results suggest that the 18 kDa protein may be a contaminating peptidoglycan-associated protein and not part of the rhapidosome structure. Western blot analysis using antisera raised against rhapidosomes revealed that the 53 kDa component protein does not react with the antisera. We speculate that the 53 kDa protein may form the inner core of the rhapidosomes, whilst the 29 kDa protein forms the outer sheath of these structures. RP PAZIRANDEH, M (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375, USA. NR 14 TC 3 Z9 3 U1 0 U2 0 PU SOC GENERAL MICROBIOLOGY PI READING PA HARVEST HOUSE 62 LONDON ROAD, READING, BERKS, ENGLAND RG1 5AS SN 0022-1287 J9 J GEN MICROBIOL JI J. Gen. Microbiol. PD APR PY 1993 VL 139 BP 859 EP 864 PN 4 PG 6 WC Microbiology SC Microbiology GA KY980 UT WOS:A1993KY98000026 PM 8515241 ER PT J AU SNAPPER, CM YAMADA, H SMOOT, D SNEED, R LEES, A MOND, JJ AF SNAPPER, CM YAMADA, H SMOOT, D SNEED, R LEES, A MOND, JJ TI COMPARATIVE INVITRO ANALYSIS OF PROLIFERATION, IG SECRETION, AND IG CLASS SWITCHING BY MURINE MARGINAL ZONE AND FOLLICULAR B-CELLS SO JOURNAL OF IMMUNOLOGY LA English DT Article ID III PNEUMOCOCCAL POLYSACCHARIDE; MONOCLONAL-ANTIBODY; IMMUNOGLOBULIN-D; T-CELLS; SURFACE-IMMUNOGLOBULIN; INDEPENDENT ANTIGEN; INTERFERON-GAMMA; LYMPHOMA CELLS; LYMPHOCYTES; RECEPTOR AB We have previously demonstrated that activation of murine B cells by dextran-conjugated anti-IgD antibodies may serve as a polyclonal, in vitro model system for studying immune responses to T cell-independent type 2 (TI-2) Ag, as exemplified by the bacterial polysaccharides. Because in vivo Ig responses to TI-2 Ag are mediated primarily by B cells resident in the splenic marginal zone, we wished to determine whether this reflected an intrinsic difference in the responsiveness of marginal zone B cells (MZB) compared with follicular B cells (FB) to this class of Ag. In this report we demonstrate that highly purified MZB, isolated by electronic cell sorting, exhibit a lower proliferative response in vitro in response to unconjugated anti-Ig antibody as well as to dextran- or Sepharose-conjugated anti-IgM or anti-IgD antibodies, whereas they proliferate equal to or better than FB when stimulated by other B cell mitogens including LPS, Salmonella typhimurium mitogen, or an anti-CD3-activated CD4+ Th2 cell clone. Despite the different proliferative responses of MZB and FB induced by anti-Ig, Ag receptor cross-linkage stimulates comparable increases in intracellular free calcium concentrations in both of these B cell populations. Furthermore, MZB secrete Ig and undergo Ig isotype switching to a comparable degree, relative to FB, in response to both T cell-dependent and T cell-independent stimuli. This suggests that the compartmentalization of TI-2 responses to the splenic marginal zone rather than the follicular zone reflects something other than the intrinsic responsiveness of the B cells from these two sites. C1 UNIFORMED SERV UNIV HLTH SCI,DEPT MED,BETHESDA,MD 20814. USN,MED RES INST,IMMUNE CELL BIOL PROGRAM,BETHESDA,MD 20889. GEOCENTERS INC,FT WASHINGTON,MD 20744. RP SNAPPER, CM (reprint author), UNIFORMED SERV UNIV HLTH SCI,DEPT PATHOL,4301 JONES BRIDGE RD,BETHESDA,MD 20814, USA. FU NIAID NIH HHS [AI27465, AI24273] NR 48 TC 62 Z9 63 U1 0 U2 0 PU AMER ASSOC IMMUNOLOGISTS PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0022-1767 J9 J IMMUNOL JI J. Immunol. PD APR 1 PY 1993 VL 150 IS 7 BP 2737 EP 2745 PG 9 WC Immunology SC Immunology GA KT805 UT WOS:A1993KT80500019 PM 7681079 ER PT J AU HYAMS, KC MALONE, JD KAPIKIAN, AZ ESTES, MK JIANG, X BOURGEOIS, AL PAPARELLO, S HAWKINS, RE GREEN, KY AF HYAMS, KC MALONE, JD KAPIKIAN, AZ ESTES, MK JIANG, X BOURGEOIS, AL PAPARELLO, S HAWKINS, RE GREEN, KY TI NORWALK VIRUS-INFECTION AMONG DESERT STORM TROOPS SO JOURNAL OF INFECTIOUS DISEASES LA English DT Letter ID GASTROENTERITIS; OUTBREAK C1 NATL NAVAL MED CTR, BETHESDA, MD 20814 USA. NIH, INFECT DIS LAB, BETHESDA, MD 20892 USA. BAYLOR COLL MED, DIV MOLEC VIROL, HOUSTON, TX 77030 USA. RP HYAMS, KC (reprint author), USN, MED RES INST, DEPT INFECT DIS, 12300 WASHINGTON AVE, ROCKVILLE, MD 20852 USA. FU NIAID NIH HHS [AI-30488] NR 10 TC 42 Z9 43 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0022-1899 J9 J INFECT DIS JI J. Infect. Dis. PD APR PY 1993 VL 167 IS 4 BP 986 EP 987 PG 2 WC Immunology; Infectious Diseases; Microbiology SC Immunology; Infectious Diseases; Microbiology GA KU086 UT WOS:A1993KU08600033 PM 8383727 ER PT J AU LAGAKOS, N BUCARO, JA AF LAGAKOS, N BUCARO, JA TI LINEARLY CONFIGURED EMBEDDED FIBEROPTIC ACOUSTIC SENSOR SO JOURNAL OF LIGHTWAVE TECHNOLOGY LA English DT Article AB A linearly configured fiber-optic acoustic sensor has been developed by embedding a single-mode fiber in a polyurethane cylindrical layer. The acoustic sensitivity was studied in the range of 0.75-10 KHz and was found to be frequency independent and significantly higher than that of a free suspended fiber or a solid mandrel fiber sensor. A comparison is made between this sensor and air backed fiber-optic mandrel sensors. RP LAGAKOS, N (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 15 TC 7 Z9 7 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0733-8724 J9 J LIGHTWAVE TECHNOL JI J. Lightwave Technol. PD APR PY 1993 VL 11 IS 4 BP 639 EP 642 DI 10.1109/50.248129 PG 4 WC Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA LN612 UT WOS:A1993LN61200016 ER PT J AU PRICE, RR PATCHAN, M AF PRICE, RR PATCHAN, M TI ENTRAPMENT AND RELEASE CHARACTERISTICS OF 2-METHOXYNAPHTHALENE FROM CYLINDRICAL MICROSTRUCTURES FORMED FROM PHOSPHOLIPIDS SO JOURNAL OF MICROENCAPSULATION LA English DT Article AB Many natural products that exhibit biocidal activity have poor solubility in water. In order to explore the prolonged delivery of these compounds from microtubules we have utilized 2-methoxynaphthalene as a model to elucidate release characteristics of hydrophobic compounds entrapped in microtubules by spectrophotometric absorbance at 255 nm. Entrapment of this compound in microcylinders was accomplished by addition of 2-methoxynaphthalene to a water-soluble epoxy, or entrapment of the neat compound. Variation of the release rate is possible for 2-methoxynaphthalene based on the mode of entrapment and by variations in the methods used to immobilize the compound within the microcylinders. Unlike conventional microencapsulation techniques which require inclusion of the active agent at the time of formation, the use of microcylinders allows for the inclusion of a variety of active agents and the tailoring of release characteristics after their formation. We report the results of in vitro release rates of 2-methoxynaphthalene from a static diffusion system designed to explore release of hydrophobic compounds into an aqueous environment. RP PRICE, RR (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375, USA. NR 0 TC 12 Z9 14 U1 0 U2 1 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0265-2048 J9 J MICROENCAPSUL JI J. Microencapsul. PD APR-JUN PY 1993 VL 10 IS 2 BP 215 EP 222 DI 10.3109/02652049309104387 PG 8 WC Chemistry, Applied; Engineering, Chemical; Pharmacology & Pharmacy SC Chemistry; Engineering; Pharmacology & Pharmacy GA LC401 UT WOS:A1993LC40100008 PM 8331494 ER PT J AU SYMONDS, GL AF SYMONDS, GL TI TO THE GATES OF RICHMOND - THE PENINSULA CAMPAIGN - SEARS,SW SO JOURNAL OF MILITARY HISTORY LA English DT Book Review RP SYMONDS, GL (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU VIRGINIA MILITARY INST PI LEXINGTON PA LEXINGTON, VA 24450 SN 0899-3718 J9 J MILITARY HIST JI J. Mil. Hist. PD APR PY 1993 VL 57 IS 2 BP 329 EP 330 PG 2 WC History SC History GA KY270 UT WOS:A1993KY27000010 ER PT J AU BOHMER, R GERHARD, G DREXLER, F LOIDL, A NGAI, KL PANNHORST, W AF BOHMER, R GERHARD, G DREXLER, F LOIDL, A NGAI, KL PANNHORST, W TI SINGLE-PARTICLE JUMPS AND CORRELATED IONIC MOTIONS IN GLASS-CERAMICS SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Letter ID AC CONDUCTION; RELAXATION AB Using impedance spectroscopy, the ion transport in poorly Li-conducting aluminosilicate glass ceramics and their precursor glasses has been measured for temperatures 50 K < T < 550 K and covering a frequency range of more than 14 decades from 10 mHz up to 3 THz. In addition to the familiar cooperative ionic motion dominating at high temperatures, for the first time dielectric relaxation due to elementary hopping processes is observed well below room temperature. C1 UNIV MAINZ,INST PHYS,W-6500 MAINZ,GERMANY. USN,RES LAB,WASHINGTON,DC 20375. SCHOTT GLASWERKE,W-6500 MAINZ,GERMANY. RP BOHMER, R (reprint author), TH DARMSTADT,INST FESTKORPERPHYS,FACHBEREICH 5,HOCHSCHULSTR 6,W-6100 DARMSTADT,GERMANY. RI Loidl, Alois/L-8199-2015 OI Loidl, Alois/0000-0002-5579-0746 NR 22 TC 10 Z9 10 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD APR PY 1993 VL 155 IS 2 BP 189 EP 193 DI 10.1016/0022-3093(93)91325-W PG 5 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA KT608 UT WOS:A1993KT60800013 ER PT J AU JAHNKE, PV SANDIFER, JB GHER, ME GRAY, JL RICHARDSON, AC AF JAHNKE, PV SANDIFER, JB GHER, ME GRAY, JL RICHARDSON, AC TI THICK FREE GINGIVAL AND CONNECTIVE-TISSUE AUTOGRAFTS FOR ROOT COVERAGE SO JOURNAL OF PERIODONTOLOGY LA English DT Article DE CONNECTIVE TISSUE; GINGIVAL RECESSION SURGERY; GRAFTS SURGERY; TOOTH ROOT SURGERY ID ACCELERATED REATTACHMENT; DEMINERALIZED INSITU; CITRIC-ACID; GRAFT; CEMENTOGENESIS; SURFACES; DENTIN AB STUDIES HAVE SHOWN PARTIAL to complete root coverage of denuded root surfaces with the use of thick free gingival autografts (FGGs) or subepithelial connective tissue autografts (CTGs). The purpose of this study was to determine which technique would result in more predictable root coverage of Miller Class I and II marginal tissue recession defects. Paired defects in 10 patients were randomly selected for treatment with either the FGG or the CTG. With stents as reference points, soft tissue recession was measured with a calibrated probe presurgically and 3 and 6 months postsurgically. No significant differences between paired sites in presurgical defect dimensions were found. One patient was dropped from the study for noncompliance with postoperative instructions. The mean percentage of root coverage for the CTG 3 and 6 months postsurgery for the remaining 9 patients was 78% and 80%, respectively. The mean percentage of root coverage for the FGG was 43% at both periods. The difference in root coverage between the 2 techniques was significant (P< 0.03). Complete root coverage was gained in 5 of 9 CTGs but only in one of 9 FGGs. Both techniques resulted in a significant improvement in keratinized tissue and probing attachment level, with most of the changes having occurred during the first three months postoperatively. Results suggest that the CTG may provide a greater percentage of root coverage than the FGG and that both techniques will effectively increase the width of keratinized tissue. C1 USN,DENT CLIN,DEPT MED & CHIRURG,GREAT LAKES,IL 60088. BRANCH DENT CLIN,ROTA,SPAIN. RP JAHNKE, PV (reprint author), USN,SCH DENT,NATL NAVAL DENT CTR,DEPT PERIODONT,BETHESDA,MD, USA. NR 24 TC 88 Z9 92 U1 0 U2 4 PU AMER ACAD PERIODONTOLOGY PI CHICAGO PA 737 NORTH MICHIGAN AVENUE, SUITE 800, CHICAGO, IL 60611-2690 SN 0022-3492 J9 J PERIODONTOL JI J. Periodont. PD APR PY 1993 VL 64 IS 4 BP 315 EP 322 PG 8 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA KZ349 UT WOS:A1993KZ34900012 PM 8483096 ER PT J AU PADUAN, JD NIILER, PP AF PADUAN, JD NIILER, PP TI STRUCTURE OF VELOCITY AND TEMPERATURE IN THE NORTHEAST PACIFIC AS MEASURED WITH LAGRANGIAN DRIFTERS IN FALL 1987 SO JOURNAL OF PHYSICAL OCEANOGRAPHY LA English DT Article ID NEAR-SURFACE CIRCULATION; UPPER OCEAN; EDDY FIELDS; VARIABILITY; BALANCES; HEAT; STATISTICS; TRANSPORT; ATLANTIC; MOMENTUM AB In October 1987, 49 Lagrangian surface drifters (TRISTAR-11) were released in a 200-km x 200-km square area southeast of Ocean Station Papa as part of the OCEAN STORMS Experiment. The drifters measured temperature at the drogue level and reported their position through ARGOS approximately 11 times per day. Thirty-one of the drifters retained drogues for longer than three months, and data from those instruments are used to describe the evolving fall 1987 pattern of current and temperature structures at 15 m in the area between 46-degrees and 49-degrees-N, 142-degrees-W and 132-degrees-W. Time variable currents were dominated by mesoscale eddies of anticyclonic rotation with horizontal radii of 53-86 km and rotational speeds of 10-20 cm s-1. These eddies persisted for at least 90 days as evidenced by successive drifter trajectories through the eddies. Currents with periods longer than 1 day had a mean to the east of 4.4 cm s-1 and a mean to the north of 0.7 cm s-1. Background eddy kinetic energy levels were 40 cm2 s-2. Thus, eddy kinetic energy was four times larger than mean kinetic energy. The eastward single particle diffusivity was 1100 m2 s-1 and northward diffusivity was 1600 m2 s-1. The local change of thermal energy at 15-m depth was -2.9 W m-3, while on average, flow advected cold water to the east at a rate of 0.8 W m-3. Therefore, large-scale advective processes accounted for 28% of the thermal energy balance at 15 m. This horizontal heat convergence in the open ocean is comparable in magnitude to that produced by powerful equatorial currents in the eastern Pacific cold tongue. C1 UNIV CALIF SAN DIEGO, SCRIPPS INST OCEANOG, LA JOLLA, CA 92093 USA. RP PADUAN, JD (reprint author), USN, POSTGRAD SCH, DEPT OCEANOG, CODE OC PD, MONTEREY, CA 93943 USA. NR 37 TC 47 Z9 47 U1 2 U2 3 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0022-3670 EI 1520-0485 J9 J PHYS OCEANOGR JI J. Phys. Oceanogr. PD APR PY 1993 VL 23 IS 4 BP 585 EP 600 DI 10.1175/1520-0485(1993)023<0585:SOVATI>2.0.CO;2 PG 16 WC Oceanography SC Oceanography GA KY060 UT WOS:A1993KY06000001 ER PT J AU TOTH, RW CALLOW, TJ AF TOTH, RW CALLOW, TJ TI SPRAY-ON TECHNIQUE FOR AUTOPOLYMERIZING ACRYLIC RESIN SO JOURNAL OF PROSTHETIC DENTISTRY LA English DT Note C1 USN,DENT CORPS,NORFOLK,VA 23511. RP TOTH, RW (reprint author), USN,CTR DENT,AREA DENT LAB,ACRYL SECT,NORFOLK,VA 23511, USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0022-3913 J9 J PROSTHET DENT JI J. Prosthet. Dent. PD APR PY 1993 VL 69 IS 4 BP 448 EP 448 DI 10.1016/0022-3913(93)90201-X PG 1 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA KU698 UT WOS:A1993KU69800022 PM 8463983 ER PT J AU BURR, RG WOODRUFF, SI BANTA, GR AF BURR, RG WOODRUFF, SI BANTA, GR TI ASSOCIATIONS BETWEEN MOOD AND SPECIFIC HEALTH COMPOSITES DURING UNITED-STATES-NAVY PERSIAN GULF OPERATIONS SO JOURNAL OF PSYCHOSOMATIC RESEARCH LA English DT Article ID STRESS AB Previously conducted field studies using shipboard U.S. Navy personnel during at-sea operations in the Persian Gulf have shown that crew members experience mood changes and degradations in general physical health. The objectives of this study were to: (a) examine the relationship between mood and health complaints among personnel deployed in the Persian Gulf; and (b) extend previous research using specific health composites rather than a general measure of health. Mood was assessed for 104 shipboard volunteers using the Profile of Mood States Tension/Anxiety and Fatigue subscales. Health symptoms were measures using the Environmental Symptoms Questionnaire. Results of multiple regression analyses showed that each of 11 distinct health composites was significantly associated with one or both mood variables. Further, the two mood factors were differentially associated with 9 of the 11 health composites. This study underscores the usefulness of employing multiple specific health measures rather than global measures. RP BURR, RG (reprint author), USN,HLTH RES CTR,DEPT PHYSIOL PERFORMANCE & OPERAT MED,POB 85122,SAN DIEGO,CA 92186, USA. NR 22 TC 4 Z9 4 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-3999 J9 J PSYCHOSOM RES JI J. Psychosomat. Res. PD APR PY 1993 VL 37 IS 3 BP 291 EP 297 DI 10.1016/0022-3999(93)90038-H PG 7 WC Psychiatry SC Psychiatry GA KX355 UT WOS:A1993KX35500009 PM 8478824 ER PT J AU COLLINS, MD AF COLLINS, MD TI A SPLIT-STEP PADE SOLUTION FOR THE PARABOLIC EQUATION METHOD SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID WAVE-EQUATION; PROPAGATION; APPROXIMATION; ACOUSTICS; BOTTOM AB A split-step Pade solution is derived for the parabolic equation (PE) method. Higher-order Pade approximations are used to reduce both numerical errors and asymptotic errors (e.g., phase errors due to wide-angle propagation). This approach is approximately two orders of magnitude faster than solutions based on Pade approximations that account for asymptotic errors but not numerical errors. In contrast to the split-step Fourier solution, which achieves similar efficiency for some problems, the split-step Pade solution is valid for problems involving very wide propagation angles, large depth variations in the properties of the waveguide, and elastic ocean bottoms. The split-step Pade solution is practical for global-scale problems. RP COLLINS, MD (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 28 TC 398 Z9 424 U1 2 U2 13 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD APR PY 1993 VL 93 IS 4 BP 1736 EP 1742 DI 10.1121/1.406739 PN 1 PG 7 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KX495 UT WOS:A1993KX49500006 ER PT J AU LIM, R LOPES, JL HACKMAN, RH TODOROFF, DG AF LIM, R LOPES, JL HACKMAN, RH TODOROFF, DG TI SCATTERING BY OBJECTS BURIED IN UNDERWATER SEDIMENTS - THEORY AND EXPERIMENT SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID ACOUSTIC SCATTERING; WAVE-GUIDE; PARAMETRIC ARRAY; SPHERICAL-SHELL; LAMB WAVE; INTERFACE; BEAM; PENETRATION; DISPERSION; SOUND AB The scattering of sound by objects buried in underwater sediments is studied in the context of an exactly soluble model. The model consists of two fluid half-spaces separated by a planar, fluid, transition layer of arbitrary thickness. Attenuation is included in any of these regions by using complex wave numbers. A directional source field, generated in the upper half-space by a continuous line array, insonifies an object placed in the lower half-space. The scattered field detected by another line array placed anywhere in the system may be calculated. The solution is determined from the T matrix for the bounded scattering system and is exact (in linear acoustics) to all orders of multiple scattering among the interfaces and object. Numerical results are presented to investigate the effect of the local acoustic environment on the free-field, in-water scattering resonances of thin spherical shells. The field scattered by a shallowly buried object is discussed with emphasis on the importance of evanescent wave scattering in detection from above the sediment over an extended range. An initial set of experiments meant to verify the model are described. Results are presented and discussed for the measured scattering response of buried, spherical, evacuated, steel shells, that are 2.25 % and 11 % of the outer radius in thickness. RP LIM, R (reprint author), USN,CTR SURFACE WARFARE,DAHLGREN DIV,COASTAL SYST STN,CODE 130B,6703 W HIGHWAY 98,PANAMA CITY,FL 32407, USA. RI CHEN, Jiangang/A-1549-2011 NR 27 TC 49 Z9 51 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD APR PY 1993 VL 93 IS 4 BP 1762 EP 1783 DI 10.1121/1.406719 PN 1 PG 22 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KX495 UT WOS:A1993KX49500009 ER PT J AU YANG, TC AF YANG, TC TI BROAD-BAND SOURCE LOCALIZATION AND SIGNATURE ESTIMATION SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID MATCHED-FIELD; DECONVOLUTION AB The temporal signature and source location of a broadband impulse propagating in an ocean waveguide are estimated using matched mode processing and illustrated using simulated data in an Arctic sound channel. Matched mode processing provides a simple method for broadband signal detection and localization; the peak-to-sidelobe ratio is significantly improved using broadband data compared with the narrow-band case. The range and depth ambiguity function evaluated at the source location yields directly the source spectrum, which is inverse Fourier transformed to estimate the original signal waveform. For the simulated data, the reconstructed signal, compensated for spreading loss and array signal gain, agrees rather well with the original waveform. The estimated spectrum/waveform is weaker than the original spectrum/waveform due predominantly to the fact that the Arctic wave guide is lossy. A method for coherent broadband processing is proposed to improve signal localization and detection when the original source spectrum is known. Multiplying (correlating) the original spectrum with the range and depth ambiguity function, the product can be coherently summed over the frequency band of the signal. Near theoretical processing gain is achieved for the simulated data. Broadband signal detection is proposed using a frequency versus depth plot in addition to the commonly used frequency versus bearing plot. RP YANG, TC (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 19 TC 21 Z9 21 U1 2 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD APR PY 1993 VL 93 IS 4 BP 1797 EP 1806 DI 10.1121/1.406721 PN 1 PG 10 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KX495 UT WOS:A1993KX49500011 ER PT J AU COLLINS, MD AF COLLINS, MD TI A 2-WAY PARABOLIC EQUATION FOR ELASTIC MEDIA SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID DEPENDENT BENCHMARK PROBLEMS; WAVE-PROPAGATION; GUIDES; INTERFACES; RESONANCES; ACOUSTICS; BOTTOM; LAYERS; ROUGH AB The parabolic equation (PE) method is extended to handle wave propagation and scattering in range-dependent elastic waveguides, which are approximated by a sequence of range-independent regions. The two-way elastic PE involves an efficient PE-based scattering method for computing reflected and transmitted fields at the vertical interfaces separating range-independent regions. The one-way elastic PE is used to propagate the outgoing and incoming fields through the range-independent regions with two-way range marching. In addition to providing the backscattered field, the two-way PE provides a correction to the outgoing field. The self-starter is generalized to handle a source in a solid layer. RP COLLINS, MD (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 37 TC 37 Z9 37 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD APR PY 1993 VL 93 IS 4 BP 1815 EP 1825 DI 10.1121/1.406723 PN 1 PG 11 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KX495 UT WOS:A1993KX49500013 ER PT J AU COLLINS, MD BERKSON, JM KUPERMAN, WA MAKRIS, NC PERKINS, JS AF COLLINS, MD BERKSON, JM KUPERMAN, WA MAKRIS, NC PERKINS, JS TI APPLICATIONS OF OPTIMAL TIME-DOMAIN BEAMFORMING SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB Applications to ocean acoustic data from a towed array and to speech processing are presented for an improved optimal time-domain beamformer, which involves optimizing over all possible source bearings and time series for multiple sources using simulated annealing. The convergence of the parameter search is accelerated by accepting time series perturbations only when the energy decreases. A comparison with the conventional delay-and-sum beamformer illustrates that the optimal beamformer handles larger receiver spacing and larger source-to-receiver ratio. Periodic ambiguities are essentially eliminated by using irregular receiver spacing and the improved search algorithm. Weak sources are handled with fractional beamforming. Noise cancellation is possible if the parameters of the noise are included in the search space. Two-dimensional localization is performed for nearby sources. RP COLLINS, MD (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 7 TC 4 Z9 4 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD APR PY 1993 VL 93 IS 4 BP 1851 EP 1865 DI 10.1121/1.406700 PN 1 PG 15 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KX495 UT WOS:A1993KX49500016 ER PT J AU DUBBELDAY, PS AF DUBBELDAY, PS TI CONSTRAINED-LAYER DAMPING ANALYSIS FOR EXTENSIONAL WAVES IN INFINITE, FLUID-LOADED PLATES SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB This study concerns the mathematical analysis of constrained-layer damping of extensional waves in plates of infinite extent, with and without fluid loading. Previous work was mostly limited to flexural waves. Some aspects of fluid loading for flexural waves may be understood by means of thin-plate theory. Therefore, a similar theory was developed for extensional waves. The description and examples presented here are based on three models: The first is an extension of Kerwin's 1959 model [E. M. Kerwin, J. Acoust. Soc. Am. 31, 952-962 (1959)], the second is a hybrid model in which the base plate is described by exact elasticity theory and the other two layers by Kerwin's concepts, and the third uses exact elasticity theory for all three layers. It is shown that the extended Kerwin model is useful in the design of constrained-layer damping for extensional waves as well as for flexural waves. RP DUBBELDAY, PS (reprint author), USN,RES LAB,UNDERWATER SOUND REFERENCE DETACHMENT,POB 568337,ORLANDO,FL 32856, USA. NR 9 TC 7 Z9 8 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD APR PY 1993 VL 93 IS 4 BP 1927 EP 1935 DI 10.1121/1.406832 PN 1 PG 9 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KX495 UT WOS:A1993KX49500024 ER PT J AU GORDIS, JH AF GORDIS, JH TI A FREQUENCY-DOMAIN THEORY FOR STRUCTURAL IDENTIFICATION SO JOURNAL OF THE AMERICAN HELICOPTER SOCIETY LA English DT Article AB A new theory for structural identification, presented herein, is under development and is shown to address critical issues in the airframe vibration prediction problem. The theory allows a finite element model to be corrected such that its frequency response predictions will precisely match the corresponding test data at all frequencies of interest. The theory demonstrates that an exact solution for the corrective structural matrices is available directly from spatially complete frequency response data. Furthermore, the theory reveals that structural identification using spatially incomplete data imposes a frequency dependency in the identified missing parameters. Operating with spatially complete test data, the theory provides an exact solution for the location of modeling errors. The theory inherently provides corrections for errors due to the discretization of a continuous structure and the further discretization errors imposed by dynamic reduction of the finite element model, and accommodates any frequency dependent mechanisms inherent in the structure. C1 RENSSELAER POLYTECH INST,DEPT MECH ENGN AERO ENGN & MECH,TROY,NY 12181. RP GORDIS, JH (reprint author), USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93940, USA. NR 19 TC 0 Z9 0 U1 0 U2 0 PU AMER HELICOPTER SOC INC PI ALEXANDRIA PA 217 N WASHINGTON ST, ALEXANDRIA, VA 22314 SN 0002-8711 J9 J AM HELICOPTER SOC JI J. Am. Helicopter Soc. PD APR PY 1993 VL 38 IS 2 BP 25 EP 33 PG 9 WC Engineering, Aerospace SC Engineering GA LC580 UT WOS:A1993LC58000003 ER PT J AU SARIGULKLIJN, MM KOLAR, R WOOD, ER AF SARIGULKLIJN, MM KOLAR, R WOOD, ER TI APPLICATION OF 2 CHAOS METHODS TO HIGHER HARMONIC CONTROL DATA SO JOURNAL OF THE AMERICAN HELICOPTER SOCIETY LA English DT Article AB This paper presents two new data analysis methods which will reduce Higher Harmonic Control (HHC) flight test requirements. HHC is an active system which suppresses helicopter vibrations. These methods, originally used in the study or chaos, are the Poincare section and the Van der Pol plane. Using flight test data from a McDonnell Douglas OH-6A HHC test aircraft, these methods show the following: 1) the limits of HHC vibration reduction; 2) determination of HHC controller type; and 3) that the HHC controller transfer matrix is predictable and repeatable when defined in the ''Rotor Time Domain.'' (This domain is a concept introduced in this paper. These benefits do not require an HHC equipped helicopter, although they do require an instrumentation system installed. Finally, these methods can be implemented in real time in most instrumentation systems using only software changes and may be applicable to other vibration control and flight testing problems. C1 USN,POSTGRAD SCH,DEPT AERONAUT & ASTRONAUT,MONTEREY,CA 93940. RP SARIGULKLIJN, MM (reprint author), USN,NAVAL AVIAT DEPOT,ALAMEDA,CA, USA. NR 9 TC 1 Z9 1 U1 0 U2 1 PU AMER HELICOPTER SOC INC PI ALEXANDRIA PA 217 N WASHINGTON ST, ALEXANDRIA, VA 22314 SN 0002-8711 J9 J AM HELICOPTER SOC JI J. Am. Helicopter Soc. PD APR PY 1993 VL 38 IS 2 BP 68 EP 77 PG 10 WC Engineering, Aerospace SC Engineering GA LC580 UT WOS:A1993LC58000008 ER PT J AU PHIPPS, WE NETA, B DANIELSON, DA AF PHIPPS, WE NETA, B DANIELSON, DA TI PARALLELIZATION OF THE NAVAL SPACE SURVEILLANCE SATELLITE MOTION MODEL SO JOURNAL OF THE ASTRONAUTICAL SCIENCES LA English DT Article AB The Naval Space Surveillance Center (NAVSPASUR) uses an analytic satellite motion model based on the Brouwer-Lyddane theory to track objects orbiting the Earth. In this paper we develop several parallel algorithms based on this model. These have been implemented on the INTEL iPSC/2 hypercube multicomputer. The speedup and efficiency of these algorithms will be obtained. We show that the best of these algorithms achieves 87% efficiency if one uses a 16-node hypercube. RP PHIPPS, WE (reprint author), NAVAL POSTGRAD SCH,DEPT MATH,CODE MA ND,MONTEREY,CA 93943, USA. RI Neta, Beny/B-1737-2009 NR 5 TC 3 Z9 3 U1 0 U2 0 PU AMER ASTRONAUTICAL SOC PI SPRINGFIELD PA 6352 ROLLING MILL PLACE SUITE 102, SPRINGFIELD, VA 22152 SN 0021-9142 J9 J ASTRONAUT SCI JI J. Astronaut. Sci. PD APR-JUN PY 1993 VL 41 IS 2 BP 207 EP 216 PG 10 WC Engineering, Aerospace SC Engineering GA LQ595 UT WOS:A1993LQ59500004 ER PT J AU STANIFORTH, AN WILLIAMS, RT NETA, B AF STANIFORTH, AN WILLIAMS, RT NETA, B TI INFLUENCE OF LINEAR DEPTH VARIATION ON POINCARE, KELVIN, AND ROSSBY WAVES SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article AB Exact solutions to the linearized shallow-water equations in a channel with linear depth variation and a mean flow are obtained in terms of confluent hypergeometric functions. These solutions are the generalization to finite s (depth variation parameter) of the approximate solutions for infinitesimal s. The equations also respect an energy conservation principle (and the normal modes are thus neutrally stable) in contradistinction to those of previous studies. They are evaluated numerically for a range in s from s = 0.1 to s = 1.95, and the range of validity of previously derived approximate solutions is established. For small s the Kelvin and Poincare solutions agree well with those of Hyde, which were obtained by expanding in s. For finite s the solutions differ significantly from the Hyde expansions, and the magnitude of the phase speed decreases as s increases. The Rossby wave phase speeds are close to those obtained when the depth is linearized although the difference increases with s. The eigenfunctions become more distorted as s increases so that the largest amplitude and the smallest scale occur near the shallowest boundary. The negative Kelvin wave has a very unusual behavior as s increases. C1 USN,POSTGRAD SCH,DEPT METEOROL,MONTEREY,CA 93943. ATMOSPHER ENVIRONM SERV,DORVAL,PQ,CANADA. USN,POSTGRAD SCH,DEPT MATH,MONTEREY,CA. RI Neta, Beny/B-1737-2009; Staniforth, Andrew/J-8554-2014 OI Staniforth, Andrew/0000-0002-9134-4495 NR 8 TC 7 Z9 7 U1 0 U2 1 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0022-4928 J9 J ATMOS SCI JI J. Atmos. Sci. PD APR 1 PY 1993 VL 50 IS 7 BP 929 EP 940 DI 10.1175/1520-0469(1993)050<0929:IOLDVO>2.0.CO;2 PG 12 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KX581 UT WOS:A1993KX58100001 ER PT J AU CHEN, RS JAYAKODY, JP GREENBAUM, SG PAK, YS XU, G MCLIN, MG FONTANELLA, JJ AF CHEN, RS JAYAKODY, JP GREENBAUM, SG PAK, YS XU, G MCLIN, MG FONTANELLA, JJ TI STUDIES OF WATER IN NAFION MEMBRANES - USING DEUTERON AND O-17 NUCLEAR-MAGNETIC-RESONANCE, AND DIELECTRIC-RELAXATION TECHNIQUES SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID CONDUCTIVITY; DIFFUSION AB Deuteron and oxygen-17 nuclear magnetic resonance measurements and dielectric relaxation studies of Nation-117 membranes with variable water content (approximately 5-18% by weight) have been carried out. Glassy behavior of the water domains at low temperature, below ca. 200 K, is evidenced by the specific nature of the H-2 NMR line shapes. Activation energies extracted from H-2 spin-lattice relaxation data on the high temperature side of the T1 minimum exhibit a steady increase with increasing water content. In spite of a high degree of molecular mobility, angular-dependent spectra in both as-received and stretched samples reflect considerable anisotropy of the host polymer. A dielectric loss peak is observed which previously has been attributed to the glass transition of the aqueous domains. C1 MCMASTER UNIV,DEPT MAT SCI,HAMILTON L8S 4L7,ONTARIO,CANADA. USN ACAD,DEPT PHYS,ANNAPOLIS,MD 21402. RP CHEN, RS (reprint author), CUNY HUNTER COLL,DEPT PHYS,NEW YORK,NY 10021, USA. NR 22 TC 55 Z9 57 U1 1 U2 14 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD APR PY 1993 VL 140 IS 4 BP 889 EP 895 DI 10.1149/1.2056223 PG 7 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA KY388 UT WOS:A1993KY38800014 ER PT J AU VANKEUREN, DK AF VANKEUREN, DK TI AN AGENDA FOR ANTIQUITY - OSBORN,HENRY,FAIRFIELD AND VERTEBRATE PALEONTOLOGY AT THE AMERICAN-MUSEUM-OF-NATURAL-HISTORY, 1890-1935 - RAINGER,R SO JOURNAL OF THE HISTORY OF THE BEHAVIORAL SCIENCES LA English DT Book Review RP VANKEUREN, DK (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU CLINICAL PSYCHOLOGY PUBL CO PI BRANDON PA 4 CONANT SQUARE, BRANDON, VT 05733 SN 0022-5061 J9 J HIST BEHAV SCI JI J. Hist. Behav. Sci. PD APR PY 1993 VL 29 IS 2 BP 154 EP 156 PG 3 WC History Of Social Sciences SC Social Sciences - Other Topics GA KY538 UT WOS:A1993KY53800009 ER PT J AU SICA, L AF SICA, L TI EFFECTS OF NONREDUNDANCE ON A SYNTHETIC-APERTURE IMAGING-SYSTEM SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION LA English DT Article AB The analysis of signal-to-noise ratio (SNR) and associated imaging properties of an integrative synthetic-aperture imaging technique is extended to include the effects of an explicitly nonredundant aperture. This requires modification of the image estimator that has been used previously. In the case of a nonredundant transmitter and point receiver, which corresponds to a coherently illuminated object in an analogous optical system, no useful image is formed. As the receiver size increases, the system is capable of forming an image of increasing fidelity to an object that in the counterpart analogous system is illuminated with light of decreasing spatial coherence. As the receiver aperture enlarges, the image should become independent of coherent artifacts just as in the case of imaging with a redundant transmitter. Curves of SNR versus receiver-to-transmitter diameter ratio are given that compare the redundant and the nonredundant cases. The SNR is somewhat lower at all receiver sizes for the nonredundant transmitter aperture. RP SICA, L (reprint author), USN,RES LAB,CODE 6530,WASHINGTON,DC 20375, USA. NR 9 TC 5 Z9 8 U1 1 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3232 J9 J OPT SOC AM A JI J. Opt. Soc. Am. A-Opt. Image Sci. Vis. PD APR PY 1993 VL 10 IS 4 BP 567 EP 572 DI 10.1364/JOSAA.10.000567 PG 6 WC Optics SC Optics GA KU219 UT WOS:A1993KU21900004 ER PT J AU DULING, IN AF DULING, IN TI COMPACT FIBER SOLITON LASERS PRODUCE ULTRASHORT PULSES SO LASER FOCUS WORLD LA English DT Article RP DULING, IN (reprint author), USN,RES LAB,CODE 5670,4555 OVERLOOK AVE,WASHINGTON,DC 20375, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU PENNWELL PUBL CO PI NASHUA PA 5TH FLOOR TEN TARA BOULEVARD, NASHUA, NH 03062-2801 SN 0740-2511 J9 LASER FOCUS WORLD JI Laser Focus World PD APR PY 1993 VL 29 IS 4 BP 213 EP & PG 0 WC Optics SC Optics GA MC382 UT WOS:A1993MC38200040 ER PT J AU MICHAEL, TS AF MICHAEL, TS TI THE STRUCTURE MATRIX OF THE CLASS OF R-MULTIGRAPHS WITH A PRESCRIBED DEGREE SEQUENCE SO LINEAR ALGEBRA AND ITS APPLICATIONS LA English DT Article AB We introduce a structure matrix S(r)(D) into the study of the class G(r)(D) of r-multigraphs with the prescribed degree sequence D. Our structure matrix plays the role of the one used by Ryser, Fulkerson, and others to investigate classes of matrices of 0's and 1's with prescribed row and column sums. We develop a theory that is wholly analogous to the classical one. We show that under a type of monotonicity assumption on D = (d1,..., d(n)) the class G(r)(D) is nonempty if and only if the sum d1 + ... +d(n) is even and the structure matrix S(r)(D) is nonnegative. We also prove a generalization of the analogue of Ryser's maximum term rank formula. This result includes both a formula for the maximum number of edges in a matching and a formula for the maximum number of edges in a spanning, nearly regular subgraph among all graphs with a prescribed degree sequence. RP MICHAEL, TS (reprint author), USN ACAD,DEPT MATH,ANNAPOLIS,MD 21402, USA. NR 32 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0024-3795 J9 LINEAR ALGEBRA APPL JI Linear Alg. Appl. PD APR 1 PY 1993 VL 183 BP 155 EP 177 DI 10.1016/0024-3795(93)90430-V PG 23 WC Mathematics, Applied; Mathematics SC Mathematics GA KU470 UT WOS:A1993KU47000010 ER PT J AU WU, L GARLAND, CW SOMASEKHAR, S SHASHIDHAR, R AF WU, L GARLAND, CW SOMASEKHAR, S SHASHIDHAR, R TI X-RAY AND CALORIMETRIC STUDY OF SMECTIC-(C)OVER-TILDE SMECTIC-A(2) SMECTIC-C(2) TRANSITIONS IN A LIQUID-CRYSTAL MIXTURE SO LIQUID CRYSTALS LA English DT Article ID POLAR MESOGENS; NEMATIC PHASE; POLYMORPHISM; BEHAVIOR AB The phase diagram has been established for binary mixtures of nonyloxybiphenyl cyanobenzoate (9OBCB) and pentylphenylcyanobenzoyloxy benzoate (DB5CN). These frustrated liquid crystals exhibit a rich variety of polymorphic smectic A (S(A)) and smectic C(S(C)) phases. X-ray and calorimetric studies have been made of S(A)d-S(C)-S(C2) and S(A)d-S(A1)-S(C)-S(A2)-S(C2) phase sequences. Major emphasis is given to the tilted ribbon smectic (S(C))-bilayer smectic A (S(A2)) transition and the S(A2)-S(C2) transition. The former is first order, but there is substantial pretransitional heat capacity in the S(C) phase that can be described by an inverted Landau model. The latter transition is second order and exhibits a classical Landau step in C(p), in contrast to the behaviour of S(A)-S(C) transitions in non-polar systems where an extended Landau model with a large sixth order term is required. C1 MIT,CTR MAT SCI & ENGN,CAMBRIDGE,MA 02139. MIT,DEPT CHEM,CAMBRIDGE,MA 02139. RAMAN RES INST,BANGALORE 560080,KARNATAKA,INDIA. USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 15 TC 1 Z9 1 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0267-8292 J9 LIQ CRYST JI Liq. Cryst. PD APR PY 1993 VL 13 IS 4 BP 507 EP 514 DI 10.1080/02678299308026323 PG 8 WC Chemistry, Multidisciplinary; Crystallography; Materials Science, Multidisciplinary SC Chemistry; Crystallography; Materials Science GA LC001 UT WOS:A1993LC00100004 ER PT J AU SENGUPTA, K ABDELHAMID, TK AF SENGUPTA, K ABDELHAMID, TK TI ALTERNATIVE CONCEPTIONS OF FEEDBACK IN DYNAMIC DECISION ENVIRONMENTS - AN EXPERIMENTAL INVESTIGATION SO MANAGEMENT SCIENCE LA English DT Article DE DYNAMIC DECISION MAKING; DECISION SUPPORT SYSTEMS; COGNITIVE FEEDBACK; FEEDFORWARD; OUTCOME FEEDBACK; SOFTWARE PROJECT MANAGEMENT ID MISPERCEPTIONS; STRATEGIES AB Studies conducted in recent years have shown that outcome feedback in dynamic decision-making tasks does not lead to improved performance. This has led researchers to examine alternatives to outcome feedback for improving decision makers' performance in such tasks. This study examines the feasibility of improving performance in dynamic tasks by providing cognitive feedback or feedforward. We report a laboratory experiment in which subjects managed a set of simulated software development projects. Results indicate that subjects provided with cognitive feedback performed best, followed by those provided with feedforward. Subjects provided with outcome feedback performed poorly. We discuss the implications of the results for decision support in dynamic tasks. RP SENGUPTA, K (reprint author), USN,POSTGRAD SCH,DEPT ADM SCI,MONTEREY,CA 93943, USA. NR 45 TC 75 Z9 76 U1 1 U2 9 PU INST OPERATIONS RESEARCH MANAGEMENT SCIENCES PI LINTHICUM HTS PA 901 ELKRIDGE LANDING RD, STE 400, LINTHICUM HTS, MD 21090-2909 SN 0025-1909 J9 MANAGE SCI JI Manage. Sci. PD APR PY 1993 VL 39 IS 4 BP 411 EP 428 DI 10.1287/mnsc.39.4.411 PG 18 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA LB251 UT WOS:A1993LB25100002 ER PT J AU CASTELLINI, MA DAVIS, RW LOUGHLIN, TR WILLIAMS, TM AF CASTELLINI, MA DAVIS, RW LOUGHLIN, TR WILLIAMS, TM TI BLOOD CHEMISTRIES AND BODY CONDITION OF STELLER SEA LION PUPS AT MARMOT-ISLAND, ALASKA SO MARINE MAMMAL SCIENCE LA English DT Note ID GLUCOSE C1 USN,KAILUA,HI 96734. TEXAS A&M UNIV SYST,DEPT MARINE BIOL,GALVESTON,TX 77553. NATL MARINE MAMMAL LAB,ALASKA FISHERIES SCI CTR,SEATTLE,WA 98115. RP CASTELLINI, MA (reprint author), UNIV ALASKA,INST MARINE SCI,FAIRBANKS,AK 99775, USA. NR 18 TC 26 Z9 26 U1 0 U2 2 PU SOC MARINE MAMMALOGY PI LAWRENCE PA 1041 NEW HAMPSHIRE ST, LAWRENCE, KS 66044 SN 0824-0469 J9 MAR MAMMAL SCI JI Mar. Mamm. Sci. PD APR PY 1993 VL 9 IS 2 BP 202 EP 208 DI 10.1111/j.1748-7692.1993.tb00446.x PG 7 WC Marine & Freshwater Biology; Zoology SC Marine & Freshwater Biology; Zoology GA KY395 UT WOS:A1993KY39500009 ER PT J AU WAITE, BA STEWART, JD AF WAITE, BA STEWART, JD TI AN IDEALIZED DYNAMIC-MODEL OF SIMPLE DIFFUSIONAL INTERACTIONS BETWEEN MACROMOLECULES AND BETWEEN MACROMOLECULES AND SURFACES SO MATHEMATICAL BIOSCIENCES LA English DT Article AB A model for hard-sphere, nonelectrostatic diffusional interactions between macromolecules and between macromolecules and surfaces is presented. Quantities such as average free path and impact frequency are derived, being validated by full three-dimensional simulations of large numbers of random flights. A method for obtaining the total collision rate is developed based on absorption boundary conditions applied to the time-independent diffusion equation, multiplied by the probable number of subsequent encounters. A distribution function is obtained that describes both the spatial and temporal impact profiles of diffusing molecules with surfaces as well as the detailed nature of individual encounters. Conclusions are that the interaction of diffusing macromolecules with surfaces is an extremely efficient process; trajectories are typified by clusters of relatively closely spaced encounters separated by relatively long excursions prior to reimpact. Results should be applicable to the development of kinetic models for describing such complex phenomena as ligand binding to receptors on cell surfaces. RP WAITE, BA (reprint author), USN ACAD,DEPT CHEM,ANNAPOLIS,MD 21402, USA. NR 31 TC 2 Z9 2 U1 0 U2 1 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0025-5564 J9 MATH BIOSCI JI Math. Biosci. PD APR PY 1993 VL 114 IS 2 BP 173 EP 213 DI 10.1016/0025-5564(93)90077-N PG 41 WC Biology; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology GA KU139 UT WOS:A1993KU13900004 PM 8385512 ER PT J AU SPANOS, G AYERS, JD VOLD, CL LOCCI, IE AF SPANOS, G AYERS, JD VOLD, CL LOCCI, IE TI THE MICROSTRUCTURAL EVOLUTION, CRYSTALLOGRAPHY, AND THERMAL-PROCESSING OF ULTRAHIGH CARBON FE-1.85 PCT-C MELT-SPUN RIBBON SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID STEEL AB The microstructural evolution, mechanisms of grain refinement, crystallography, and thermal processing of a rapidly solidified Fe-1.85 pct C alloy have been studied by transmission electron microscopy (TEM). Melt-spun ribbons quenched in liquid nitrogen consist of carbide-free highly twinned martensite plates between 0.5- and 2.0-mum long and 0.1- and 0.5-mum thick, with approximately 40 pct retained austenite also present. Ribbons tempered at 600-degrees-C for 10 seconds consist of ferrite of approximately the same grain size and both intragranular and intergranular cementite precipitates. The intragranular cementite particles are about 0.1 mum or less in size and exhibit a single variant of the Bagaryatskii orientation relationship with respect to a given ferrite grain; the intergranular particles are about 0.1 mum in thickness and can be as long as 0.5 mum due to growth and/or coalescence along ferrite grain boundaries. A heat-treatment cycle investigated with a view toward generating structures suited for superplastic consolidation of the rapidly solidified ribbons consists of quenching the ribbon in liquid nitrogen, tempering at 600-degrees-C for 10 seconds, ''upquenching'' to 750-degrees-C (austenitizing) for 10 seconds, and subsequently quenching again in liquid nitrogen. This treatment results in martensite grains highly misoriented with respect to one another and typically 0.5 mum or less in both length and thickness and cementite particles 0.4 mum or less in size. (Occasionally, longer martensite plates were observed; but they never exceeded 1 mum in length.) The microstructures produced here offer the potential for producing fine-grained ultrahigh carbon steels of very high strength without the brittleness associated with the formation of coarse carbide particles or the loss of strength due to graphite formation. This investigation has thus provided the basis for follow-on studies currently underway in ultrahigh carbon Fe-C-Cr and Fe-C-Cr-Si steels, with the intent of producing similar microstructures which will also exhibit enhanced high-temperature stability. C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. RP SPANOS, G (reprint author), USN,RES LAB,PHYS MET BRANCH,WASHINGTON,DC 20385, USA. NR 23 TC 2 Z9 2 U1 0 U2 1 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD APR PY 1993 VL 24 IS 4 BP 809 EP 818 DI 10.1007/BF02656502 PG 10 WC Materials Science, Multidisciplinary SC Materials Science GA KU568 UT WOS:A1993KU56800004 ER PT J AU YANG, C AF YANG, C TI LINEAR DEPENDENCY CHECK IN BUILT-IN TEST SO MICROELECTRONICS AND RELIABILITY LA English DT Article AB Given a characteristic polynomial p(x) and a sampling polynomial with respect to p(x), a designer likes to know whether the sampling polynomial is a dependency polynomial. A dependency polynomial gives low fault coverage in the built-in self test. The tool LDC computes the residue combinations of the factors in the set polynomial and advises designers if the sampling polynomial covers all the testing space. When the sampling polynomial is a dependency polynomial, LDC will try to find one, if any, independent polynomial at a minimum cost. In cases of short test vectors LDC can exhaustively enumerate all independent polynomials for the designers to choose from. This paper reviews the basics of the linear dependency computation, explains the LDC capabilities and its usefulness, and discusses the computational issues of the problem. C1 USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943. NATL CHIAO TUNG UNIV,INST INFORMAT MANAGEMENT,HSINCHU,TAIWAN. NR 4 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0026-2714 J9 MICROELECTRON RELIAB JI Microelectron. Reliab. PD APR PY 1993 VL 33 IS 5 BP 633 EP 636 DI 10.1016/0026-2714(93)90268-4 PG 4 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA KW049 UT WOS:A1993KW04900002 ER PT J AU AHRENS, WD AF AHRENS, WD TI NURSING ORGANIZATIONAL RESTRUCTURE - CHOOSING TO CHANGE SO MILITARY MEDICINE LA English DT Article AB Major organizational change frequently results in fear, anxiety, and resistance. Change is often initiated in response to a perceived threat. However, intentional changes to historical patterns of nursing care delivery arc now more prevalent, in the absence of crisis, as leaders anticipate new challenges and fulfill today's nurses' need for high-level professional satisfaction. This essay describes factors which inspired nursing organizational restructure at a naval hospital. The specific modifications made and strategies for managing them are reviewed in the context of using planned change principles and risk-taking behavior to achieve organizational growth. RP AHRENS, WD (reprint author), USN HOSP,NURSING SERV,CODE 02,600 W HIGHWAY 98,PENSACOLA,FL 32512, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0026-4075 J9 MIL MED JI Milit. Med. PD APR PY 1993 VL 158 IS 4 BP 208 EP 212 PG 5 WC Medicine, General & Internal SC General & Internal Medicine GA KX614 UT WOS:A1993KX61400011 PM 8479625 ER PT J AU BEHMER, CL HOFFMAN, MA FREEMAN, VS AF BEHMER, CL HOFFMAN, MA FREEMAN, VS TI A MULTIFOCAL COMPARISON OF HEALTH-STATUS AND PHYSICAL READINESS TEST-RESULTS OF NAVY PERSONNEL SO MILITARY MEDICINE LA English DT Article AB Many health risk factors are behaviorally related and therefore subject to modification. This study compared health risk appraisal (HRA) age, chronological age, identified risk factors, physiological measures, and demographic variables with Physical Readiness Test results of 100 active duty Navy personnel. Cholesterol levels were 200 mg/dl or greater in 42% of the subjects, with 32% having total:high-density lipoprotein cholesterol ratios of 5.0 or above. Additionally, HRA ages were significantly higher than chronological ages (p less-than-or-equal-to .05). This study presents methods for (1) identifying needs for health teaching and/or counseling, and (2) increasing individual awareness of health risk factors and the effects of lifestyle on health risk. RP BEHMER, CL (reprint author), USN HOSP,BOX 22,SAN DIEGO,CA 92134, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0026-4075 J9 MIL MED JI Milit. Med. PD APR PY 1993 VL 158 IS 4 BP 248 EP 252 PG 5 WC Medicine, General & Internal SC General & Internal Medicine GA KX614 UT WOS:A1993KX61400017 PM 8479631 ER PT J AU COOK, AA AF COOK, AA TI HANDCUFF NEUROPATHY AMONG UNITED-STATES PRISONERS OF WAR FROM OPERATION DESERT STORM SO MILITARY MEDICINE LA English DT Article AB Handcuff neuropathy was the most common neurologic problem acquired by U.S. prisoners of war during Operation Desert Storm. Neurologic deficits were exclusively sensory in all those affected and began to resolve shortly after their release from captivity. Some individuals expressed concern that these injuries could be career-threatening. One of those repeatedly restrained felt that he had discovered measures that could be undertaken to lessen the likelihood of developing neuropathy. RP COOK, AA (reprint author), USN HOSP,DEPT NEUROL,OAKLAND,CA 94627, USA. NR 0 TC 5 Z9 5 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0026-4075 J9 MIL MED JI Milit. Med. PD APR PY 1993 VL 158 IS 4 BP 253 EP 254 PG 2 WC Medicine, General & Internal SC General & Internal Medicine GA KX614 UT WOS:A1993KX61400018 PM 8479632 ER PT J AU KEEGAN, MA SKROCH, J PAPACONSTANTOPOULOS, DA AF KEEGAN, MA SKROCH, J PAPACONSTANTOPOULOS, DA TI ANALYTIC EXPRESSIONS OF BAND-STRUCTURE POTENTIALS AND TRANSFERABILITY STUDIES SO MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING LA English DT Article AB We performed a least-squares fit for crystal potentials derived by APW band structure calculations for monatomic, as well as diatomic, structures. The potential is described by an eighth order polynomial multiplied by an exponential function. The fitted potentials yield eigenvalues, for a variety of k points, within 2-3 mRyd of the first-principles APW results. We have also discovered that starting with the fitted potential at a given lattice constant and using the potential in the interstitial region (muffin-tin zero) as a single parameter, we are able to accurately reproduce the band structure at another lattice constant. The relationship between the muffin-tin zero and the lattice parameter is very nearly linear. The linear relationship allows us to use these modified potentials for 'one-shot' total energy calculations which given an equilibrium lattice parameter and a bulk modulus in very good agreement with the self-consistent calculations. We believe that these findings may be of importance in the search for transferable potential energy functions that can be used in calculating the band structure and the total energy of large systems. C1 USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375. RP KEEGAN, MA (reprint author), GEORGE MASON UNIV,FAIRFAX,VA 22030, USA. NR 6 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0965-0393 J9 MODEL SIMUL MATER SC JI Model. Simul. Mater. Sci. Eng. PD APR PY 1993 VL 1 IS 3 BP 307 EP 313 DI 10.1088/0965-0393/1/3/005 PG 7 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA MP246 UT WOS:A1993MP24600006 ER PT J AU CHU, E KOELLER, DM JOHNSTON, PG ZINN, S ALLEGRA, CJ AF CHU, E KOELLER, DM JOHNSTON, PG ZINN, S ALLEGRA, CJ TI REGULATION OF THYMIDYLATE SYNTHASE IN HUMAN COLON CANCER-CELLS TREATED WITH 5-FLUOROURACIL AND INTERFERON-GAMMA SO MOLECULAR PHARMACOLOGY LA English DT Article ID HUMAN COLORECTAL-CARCINOMA; MESSENGER-RNA TRANSLATION; CULTURED MAMMALIAN-CELLS; DIHYDROFOLATE-REDUCTASE; GENE-EXPRESSION; SYNTHETASE-ACTIVITY; MOUSE FIBROBLASTS; THYMIDINE KINASE; BREAST-CANCER; LINES AB The effects of fluorouracil (5-FU) and interferon-gamma (IFN-gamma) on the regulation of thymidylate synthase (TS) gene expression were investigated in the human colon cancer H630 cell line. By Western immunoblot analysis, TS protein levels in H630 cells were increased 3-, 5.5-, 5-, and 2.5-fold after 8-, 16-, 24-, and 36-hr exposure to 1 mum 5-FU, respectively. When H630 cells were exposed to varying concentrations of 5-FU (0.3-10 muM) for 24 hr, increases in TS protein up to 5.5-fold were observed. A 24-hr exposure to 1 muM 5-FU resulted in a 4.5-fold increase in the level of TS protein, whereas in 5-FU/IFN-gamma-treated cells TS protein was increased by only 1.8-fold, compared with control cells. IFN-gamma treatment alone did not affect TS protein levels, relative to control. Northern blot analysis revealed no changes in TS mRNA levels when H630 cells were exposed either to 1 muM 5-FU for 8-36 hr, to varying concentrations of 5-FU (0.3-10 muM) for 24 hr, or to the combination of 5-FU and IFN-gamma. Pulse-labeling studies with [S-35]methionine demonstrated a 3.5-fold increase in net synthesis of TS in cells treated with 1 muM 5-FU, whereas the level of newly synthesized TS increased only 1.5-fold in cells treated with 5-FU/IFN-gamma, compared with control cells. Pulse-chase studies revealed that the half-lives of TS protein in control and 5-FU-treated cells were equivalent. These findings demonstrate that the increase in TS protein after 5-FU exposure and the subsequent inhibitory effect of IFN-gamma on TS protein expression are both regulated at the post-transcriptional level. C1 UNIV WASHINGTON,DEPT MED,DIV MED GENET,SEATTLE,WA 98105. RP CHU, E (reprint author), USN,NCI,DIV CANC TREATMENT,MED ONCOL BRANCH,BLDG 8,ROOM 5101,BETHESDA,MD 20889, USA. NR 46 TC 136 Z9 139 U1 0 U2 1 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0026-895X J9 MOL PHARMACOL JI Mol. Pharmacol. PD APR PY 1993 VL 43 IS 4 BP 527 EP 533 PG 7 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA KY669 UT WOS:A1993KY66900006 PM 8474431 ER PT J AU HOLT, TR CHANG, SW AF HOLT, TR CHANG, SW TI A NUMERICAL INVESTIGATION OF THE EFFECTS OF TIMING OF DIABATIC PROCESSES IN THE COASTAL CYCLOGENESIS OF GALE IOP-2 SO MONTHLY WEATHER REVIEW LA English DT Article ID PRESIDENTS DAY CYCLONE; MARINE BOUNDARY-LAYER; SURFACE-ENERGY FLUXES; EXPLOSIVE CYCLONES; RAPID CYCLOGENESIS; PARAMETERIZATION; MODEL; HEAT; CLIMATOLOGY; GALE-IOP-2 AB Sensitivity of coastal cyclogenesis to the effects of timing of diabatic processes is investigated using the Naval Research Laboratory mesoscale model. Numerical experiments were conducted to examine the sensitivity of the intensification and propagation of a coastal cyclone to changes in the timing of latent heat release due to cumulus convection, surface fluxes, and low-level baroclinicity. The NMC Regional Analysis and Forecast System analysis of the GALE IOP 2 coastal cyclone was unable to resolve the initial subsynoptic-scale cyclogenesis. Hence, tracking and identification of a well-defined coastal cyclone was difficult operationally. However, the control model experiment having full physics, initialized with the NMC analyses, was able to properly simulate the development of the coastal cyclone. Results from the control experiment agree with the more accurate Fleet Numerical Oceanographic Center low-level analysis. The numerical experiments suggest the development of the surface cyclone was a result of proper superposition and interaction of the upper-level forcing and the low-level baroclinic zone. Altering the timing of latent heat release due to cumulus convection in the control experiment indicates that for the initial 12 h of cyclogenesis, cumulus convection as determined by the modified Kuo scheme has little effect on the deepening of the surface system but strongly changes the alignment of the trough by retarding the eastward propagation. It is during the second 12 h of cyclogenesis that cumulus convection is crucial for rapid cyclogenesis. Imposing a zonal sea surface temperature, in addition to withholding cumulus heating, has the most impact once the system has reached the coast. The enhanced coastal baroclinicity due to the zonal SST distribution causes the surface cyclone to propagate closer to the coast and more slowly than the control experiment. Allowing no surface fluxes, in addition to no cumulus convection, cools and stabilizes the boundary layer and inhibits surface intensification. The strong coastal baroclinicity is weakened without surface fluxes and the cyclone remains well onshore. An experiment to modify the phasing of the low-level baroclinic zone is conducted by imposing an additional linear increase in ground surface temperature to the typical diurnal heating cycle as well as eliminating ocean surface sensible heat flux for the initial 12 h of cyclogenesis. This results in a low-level temperature field that is out of phase with the typical diurnal surface evolution. The surface cyclone deepens much more rapidly [41 mb (24 h)-1] than the control experiment and remains more onshore with relatively little movement. In addition, potential vorticity analysis suggests that the upper levels for this experiment have much weaker protrusions of high potential vorticity into the lower troposphere compared to the control experiment. C1 USN,RES LAB,WASHINGTON,DC 20375. RP HOLT, TR (reprint author), USN,POSTGRAD SCH,DEPT METEOROL,MONTEREY,CA 93943, USA. NR 37 TC 5 Z9 6 U1 1 U2 1 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0027-0644 J9 MON WEATHER REV JI Mon. Weather Rev. PD APR PY 1993 VL 121 IS 4 BP 1007 EP 1029 DI 10.1175/1520-0493(1993)121<1007:ANIOTE>2.0.CO;2 PG 23 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KX217 UT WOS:A1993KX21700006 ER PT J AU HATHAWAY, KB CLARK, AE AF HATHAWAY, KB CLARK, AE TI MAGNETOSTRICTIVE MATERIALS SO MRS BULLETIN LA English DT Article RP HATHAWAY, KB (reprint author), USN,CTR SURFACE WARFARE,WHITE OAK LAB,WASHINGTON,DC 20350, USA. NR 15 TC 45 Z9 49 U1 2 U2 5 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0883-7694 J9 MRS BULL JI MRS Bull. PD APR PY 1993 VL 18 IS 4 BP 34 EP 41 PG 8 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA KX603 UT WOS:A1993KX60300006 ER PT J AU WILLIAMSON, DL SINGER, IL WEI, R WILBUR, PJ AF WILLIAMSON, DL SINGER, IL WEI, R WILBUR, PJ TI AMORPHOUS FE-TI-C PHASE PRODUCED BY ION-IMPLANTATION OF IRON AND ITS ROLE IN TRIBOLOGICAL BEHAVIOR SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article; Proceedings Paper CT 3RD INTERNATIONAL SYMP ON THE INDUSTRIAL APPLICATIONS OF THE MOSSBAUER EFFECT CY AUG 24-27, 1992 CL OTSU, JAPAN SP RYUKOKU UNIV, NISSIN STEEL ID SURFACE MECHANICAL-PROPERTIES; STEEL; CARBON; MICROSTRUCTURE; FRICTION; ALLOYS; WEAR AB The amorphous phase produced by high fluence implantation of both Ti and C ions into pure Fe has been investigated by conversion electron Mossbauer spectroscopy (CEMS) aided by implantation of enriched Fe-57. The tribological behavior of this near-surface amorphous layer has been examined under lubricated, sliding-wear conditions. No change in friction coefficient occurred but the average wear rate was reduced about two orders of magnitude compared to unimplanted Fe. No measurable crystallization or oxidation of the amorphous layer was detected by CEMS following the wear tests. C1 USN,RES LAB,WASHINGTON,DC 20375. COLORADO STATE UNIV,DEPT MECH ENGN,FT COLLINS,CO 80523. RP WILLIAMSON, DL (reprint author), COLORADO SCH MINES,DEPT PHYS,GOLDEN,CO 80401, USA. NR 15 TC 8 Z9 9 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD APR PY 1993 VL 76 IS 1-4 BP 210 EP 212 DI 10.1016/0168-583X(93)95183-6 PG 3 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KZ089 UT WOS:A1993KZ08900074 ER PT J AU OTTERSON, GA KRATZKE, RA LIN, AY JOHNSTON, PG KAYE, FJ AF OTTERSON, GA KRATZKE, RA LIN, AY JOHNSTON, PG KAYE, FJ TI ALTERNATIVE SPLICING OF THE RBP1 GENE CLUSTERS IN AN INTERNAL EXON THAT ENCODES POTENTIAL PHOSPHORYLATION SITES SO ONCOGENE LA English DT Article ID RETINOBLASTOMA SUSCEPTIBILITY GENE; CELL-CYCLE; TRANSCRIPTION FACTOR; PRODUCT; PROTEINS; BINDING; EXPRESSION; CARCINOMA; COMPLEX; IDENTIFICATION AB We have isolated cDNA and genomic clones for the human retinoblastoma binding protein 1 (RBP1) gene, and have identified alternative splicing of RBP1 clustered within a 207-nucleotide internal exon. Three of the predicted RPB1 peptides share amino-terminal and carboxy-terminal domains, while a fourth species encodes a distinct carboxy-terminal domain. Functional analysis of these peptides demonstrated that they are capable of precipitating retinoblastoma (RB) protein in vitro from K562 cell lysates, but cannot bind to mutant RB protein. However, each of the RBP1 peptides differed within an internal exon that contains potential casein kinase II and p34cdc2 phosphorylation sites. Immunoblot analysis using polyclonal alpha-RBP1 antiserum revealed that the RBP1 protein is expressed in a wide range of cell lines of differing histologic type and migrates on sodium dodecyl sulfate-polyacrylamide gel electrophoresis predominantly as a 200-kDa protein. Immunohistochemical analysis using the alpha-RBP1 antiserum demonstrated a distinct nuclear staining pattern that was eliminated when the antiserum was preabsorbed with RBP1 peptide. The RBP1 gene encodes a widely expressed 200-kDa nuclear protein and undergoes alternative splicing that predicts a family of RB-binding peptides. C1 USN HOSP,NCI,NAVY ONCOL BRANCH,BLDG 8,RM 5101,BETHESDA,MD 20889. UNIV HLTH SCI,UNIFORMED SERV,BETHESDA,MD 20889. RI kaye, frederic/E-2437-2011 NR 38 TC 20 Z9 21 U1 0 U2 1 PU STOCKTON PRESS PI BASINGSTOKE PA HOUNDMILLS, BASINGSTOKE, HAMPSHIRE, ENGLAND RG21 6XS SN 0950-9232 J9 ONCOGENE JI Oncogene PD APR PY 1993 VL 8 IS 4 BP 949 EP 957 PG 9 WC Biochemistry & Molecular Biology; Oncology; Cell Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Oncology; Cell Biology; Genetics & Heredity GA KT220 UT WOS:A1993KT22000017 PM 8455946 ER PT J AU SCHEPS, R MYERS, JF GLESNE, TR SERREZE, HB AF SCHEPS, R MYERS, JF GLESNE, TR SERREZE, HB TI MONOCHROMATIC END-PUMPED OPERATION OF AN ALEXANDRITE LASER SO OPTICS COMMUNICATIONS LA English DT Article ID DIODES; CW AB Operation of an alexandrite laser pumped by short wavelength visible laser diodes is described. Two polarization-combined 640 nm diodes produced 25 mW output at 753 nm. Characterization measurements were performed with a dye laser. The best slope efficiency measured was 63.8%, close to the calculated intrinsic efficiency and the highest reported for a Cr3+-doped laser. The threshold power was 5.5 mW and the measured passive resonator loss was 0.06% cm. C1 NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771. MCDONNELL DOUGLAS ELECTR SYST CO,CTR OPTOELECTR,ELMSFORD,NY 10523. RP SCHEPS, R (reprint author), USN COMMAND,CTR CONTROL & OCEAN SURVEILLANCE,DIV RDT&E,CODE 754,SAN DIEGO,CA 92152, USA. NR 14 TC 16 Z9 16 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0030-4018 J9 OPT COMMUN JI Opt. Commun. PD APR 1 PY 1993 VL 97 IS 5-6 BP 363 EP 366 DI 10.1016/0030-4018(93)90504-X PG 4 WC Optics SC Optics GA KR756 UT WOS:A1993KR75600015 ER PT J AU GOPALSAMI, C YOTIS, W CORRIGAN, K SCHADE, S KEENE, J SIMONSON, L AF GOPALSAMI, C YOTIS, W CORRIGAN, K SCHADE, S KEENE, J SIMONSON, L TI EFFECT OF OUTER-MEMBRANE OF TREPONEMA-DENTICOLA ON BONE-RESORPTION SO ORAL MICROBIOLOGY AND IMMUNOLOGY LA English DT Note DE TREPONEMA-DENTICOLA; OUTER MEMBRANE; CA-45 RELEASE; BONE RESORPTION; EMBRYONIC RAT BONE; LIPOPOLYSACCHARIDE; ORAL SPIROCHETE ID PERIODONTAL-DISEASE; ENDOTOXIN; SEVERITY; CULTURE AB The effect of the outer membrane (outer sheath) of Treponema denticola on bone resorption was studied. Bone resorption was measured by the release of previously incorporated Ca-45 from the shafts of the radii and ulnae of 19-day fetal rats. A treated-over-control ratio (T/C ratio) significantly greater than 1 indicated the stimulation of bone resorption by the test substance. The addition of outer membrane of T denticola increased the release of Ca-45 from the assay bones. The minimum concentrations required to yield significant Ca-45 release from the assay bones were 15, 22 and 75 mug protein/ml for serovars a, b and c, respectively. These protein values corresponded to estimated lipopolysaccharide contents of 0.6, 0.8 and 2.8 mug/ml, based on 3-deoxy-2-manno-octulosonate analysis. Heat treatment of outer membrane (60-degrees for 30 min) did not change the effect on Ca-45 release. Parathyroid hormone or prostaglandin E2, known to act synergistically with lipopolysaccharides in bone resorption, was also added to the assay system. Neither prostaglandin E2 at 10(-7) M nor parathyroid hormone at 40 ng/ml, by itself, increased Ca-45 release. However, in the presence of 10 mug protein/ml of outer membrane of serovar b at 120 h, the T/C ratio was increased to 1.31 +/- 0.07 and 1.58 +/- 0.118, respectively. These results suggest that a lipopolysaccharide-like material is present in the outer membrane of T denticola that may be responsible for bone resorption in the in vitro system. C1 LOYOLA UNIV,STRITCH SCH MED,DEPT MICROBIOL & IMMUNOL,2160 S 1ST AVE,MAYWOOD,IL 60153. LOYOLA UNIV,DEPT PERIODONT,MAYWOOD,IL 60153. USN,DENT RES INST,GREAT LAKES,IL 60088. LOYOLA UNIV,DEPT RADIAT CONTROL,MAYWOOD,IL 60153. NR 23 TC 21 Z9 21 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0902-0055 J9 ORAL MICROBIOL IMMUN JI Oral Microbiol. Immunol. PD APR PY 1993 VL 8 IS 2 BP 121 EP 124 DI 10.1111/j.1399-302X.1993.tb00557.x PG 4 WC Dentistry, Oral Surgery & Medicine; Immunology; Microbiology SC Dentistry, Oral Surgery & Medicine; Immunology; Microbiology GA LA835 UT WOS:A1993LA83500012 PM 8355985 ER PT J AU ROSS, G KUWAMURA, F GORAL, A AF ROSS, G KUWAMURA, F GORAL, A TI ASSOCIATION OF FABRYS-DISEASE WITH FEMORAL-HEAD AVASCULAR NECROSIS SO ORTHOPEDICS LA English DT Article RP ROSS, G (reprint author), USN,NATL MED CTR,DEPT ORTHOPED,BETHESDA,MD 20089, USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU SLACK INC PI THOROFARE PA 6900 GROVE RD, THOROFARE, NJ 08086 SN 0147-7447 J9 ORTHOPEDICS JI Orthopedics PD APR PY 1993 VL 16 IS 4 BP 471 EP 473 PG 3 WC Orthopedics SC Orthopedics GA KX237 UT WOS:A1993KX23700008 PM 8493152 ER PT J AU MOEN, C AF MOEN, C TI THE DUAL PAIR (U(1), U(1)) OVER A P-ADIC FIELD SO PACIFIC JOURNAL OF MATHEMATICS LA English DT Article AB We find an explicit decomposition for the metaplectic representation restricted to either member of the dual reductive pair (U(1), U(1)) in SL(2, F), where F is a p-adic field, with p odd. RP MOEN, C (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 9 TC 12 Z9 12 U1 0 U2 0 PU PACIFIC JOURNAL MATHEMATICS PI BERKELEY PA PO BOX 4163, BERKELEY, CA 94704-0163 SN 0030-8730 J9 PAC J MATH JI Pac. J. Math. PD APR PY 1993 VL 158 IS 2 BP 365 EP 386 PG 22 WC Mathematics SC Mathematics GA KT232 UT WOS:A1993KT23200011 ER PT J AU WAECKER, NJ SHOPE, TR WEBER, PA BUCK, ML DOMINGO, RC HOOPER, DG AF WAECKER, NJ SHOPE, TR WEBER, PA BUCK, ML DOMINGO, RC HOOPER, DG TI THE RHINO-PROBE(R) NASAL CURETTE FOR DETECTING RESPIRATORY SYNCYTIAL VIRUS IN CHILDREN SO PEDIATRIC INFECTIOUS DISEASE JOURNAL LA English DT Article DE RESPIRATORY SYNCYTIAL VIRUS; NASAL WASH; RHINOPROBE(R) NASAL CURETTE; NASOPHARYNGEAL SWAB ID NASOPHARYNGEAL ASPIRATE; RAPID DETECTION; SPECIMENS; IMMUNOFLUORESCENCE; DIAGNOSIS; ASSAY AB During two outbreaks of respiratory syncytial virus (RSV) infection, 68 children with acute respiratory illnesses were cultured for RSV using a Rhino-Probe(R) (RP) nasal curette and either a nasopharyngeal (NP) swab or a nasal wash (NW). In the first outbreak isolations of RSV by the RP nasal curette and NP swab methods were compared. RSV was cultured from 25 of 42 (60%) subjects using the RP nasal curette and from 20 of 42 (48%) subjects using the NP swab. In the second outbreak the RP nasal curette and the NW collection techniques were compared. RSV was isolated from 15 of 26 (58%) children evaluated. RSV was cultured from 14 of 15 (93%) patients by RP and 13 of 15 (87%) when using NW. In the group of culture-positive subjects, the TESTPACK(R) RSV rapid antigen test was positive in 10 of 15 (67%) using the RP and in 6 of 15 (40%) using the NW. Like the NP swab the RP nasal curette was simple, noninvasive and relatively inexpensive, yet it was as sensitive as the NW for detection of RSV. C1 USN HOSP,DEPT PEDIAT,SAN DIEGO,CA 92134. USN HOSP,DEPT LAB,DIV EXPTL PATHOL,SAN DIEGO,CA 92134. NR 10 TC 3 Z9 3 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0891-3668 J9 PEDIATR INFECT DIS J JI Pediatr. Infect. Dis. J. PD APR PY 1993 VL 12 IS 4 BP 326 EP 329 DI 10.1097/00006454-199304000-00012 PG 4 WC Immunology; Infectious Diseases; Pediatrics SC Immunology; Infectious Diseases; Pediatrics GA KW848 UT WOS:A1993KW84800012 PM 8483627 ER PT J AU FRENCK, RW AF FRENCK, RW TI BONE PAIN AND FACIAL NODULE IN AN ADOLESCENT FEMALE SO PEDIATRIC INFECTIOUS DISEASE JOURNAL LA English DT Note DE COCCIDIOIDOMYCOSIS; AMPHOTERICIN-B; ABSCESS; AZOLES ID COCCIDIOIDOMYCOSIS RP FRENCK, RW (reprint author), USN HOSP,DEPT PEDIAT,OAKLAND,CA, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0891-3668 J9 PEDIATR INFECT DIS J JI Pediatr. Infect. Dis. J. PD APR PY 1993 VL 12 IS 4 BP 353 EP & DI 10.1097/00006454-199304000-00021 PG 0 WC Immunology; Infectious Diseases; Pediatrics SC Immunology; Infectious Diseases; Pediatrics GA KW848 UT WOS:A1993KW84800021 PM 8483635 ER PT J AU LEWIS, DW FRANK, LM AF LEWIS, DW FRANK, LM TI HAIR-GROOMING SYNCOPE SEIZURES SO PEDIATRICS LA English DT Note C1 CHILDRENS HOSP KINGS DAUGHTERS EASTERN VIRGINIA MED SCH,NORFOLK,VA. USN HOSP,DEPT NEUROL,PORTSMOUTH,VA. RP LEWIS, DW (reprint author), USN HOSP,DEPTS PEDIAT,PORTSMOUTH,VA 23708, USA. NR 7 TC 4 Z9 5 U1 0 U2 0 PU AMER ACAD PEDIATRICS PI ELK GROVE VILLAGE PA 141 NORTH-WEST POINT BLVD, ELK GROVE VILLAGE, IL 60007-1098 SN 0031-4005 J9 PEDIATRICS JI Pediatrics PD APR PY 1993 VL 91 IS 4 BP 836 EP 837 PG 2 WC Pediatrics SC Pediatrics GA KW567 UT WOS:A1993KW56700030 PM 8464678 ER PT J AU PRICE, JL SIMONS, DG STERN, SH LAND, DJ GUARDALA, NA BRENNAN, JG STUMBORG, MF AF PRICE, JL SIMONS, DG STERN, SH LAND, DJ GUARDALA, NA BRENNAN, JG STUMBORG, MF TI STOPPING POWERS OF THE NOBLE-GASES FOR (0.3-10)-MEV NITROGEN-IONS SO PHYSICAL REVIEW A LA English DT Article ID RANGE; Z2 AB Stopping powers of the noble gases for 300-keV to 10-MeV nitrogen ions were measured using a time-of-flight technique. The stopping power was directly determined from changes in ion time of flight over a fixed distance as a function of the target-gas pressure of a differentially pumped, windowless gas cell. The measured stopping-power values are compared to predictions of the modified Firsov theory of Land and Brennan (FLB) [At. Data Nucl. Data Tables 22, 235 (1978)] and to values compiled by Ziegler et al. [Stopping and Range of Ions in Solids (Pergamon, New York, 1985)]. The measured values are close to the FLB values at v = v0 for low target atomic number Z but are somewhat lower at higher Z. They are systematically smaller than those of Ziegler et al. at nitrogen energies below 2.5 MeV and larger from 2.5 to 10.0 MeV. For projectile velocities greater than v0 the stopping in general is found not to be proportional to velocity. C1 CATHOLIC UNIV AMER,WASHINGTON,DC 20064. RP PRICE, JL (reprint author), USN,CTR SURFACE WARFARE,WHITE OAK LAB,SILVER SPRING,MD 20910, USA. NR 21 TC 14 Z9 14 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 APR PY 1993 VL 47 IS 4 BP 2913 EP 2918 DI 10.1103/PhysRevA.47.2913 PN B PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KW309 UT WOS:A1993KW30900011 ER PT J AU ISAAK, DG COHEN, RE MEHL, MJ SINGH, DJ AF ISAAK, DG COHEN, RE MEHL, MJ SINGH, DJ TI PHASE-STABILITY OF WUSTITE AT HIGH-PRESSURE FROM 1ST-PRINCIPLES LINEARIZED AUGMENTED PLANE-WAVE CALCULATIONS SO PHYSICAL REVIEW B LA English DT Article ID GROUND-STATE PROPERTIES; INDUCED BREATHING MODEL; ALKALINE-EARTH OXIDES; ELECTRONIC-STRUCTURE; BRILLOUIN-ZONE; BAND THEORY; INDUCED METALLIZATION; ELASTIC PROPERTIES; MOTT INSULATORS; SPECIAL POINTS AB We use the local spin-density approximation (LSDA) to investigate the phase stability and physical properties of stoichiometric wustite at high pressure. Highly converged total-energy calculations are presented for nonmagnetic, ferromagnetic, and antiferromagnetic, unstrained B1 and B2, and rhombohedrally strained B1 structures. We find the local magnetic moments are greatly diminished at high pressure, and we expect the LSDA to provide an accurate description of FeO at high pressure. The antiferromagnetic ground state occurs for a small rhombohedral distortion of the B1 structure. The rhombohedral angle a decreases with increasing pressure, in agreement with available x-ray data. Our results elucidate the phase relationship between the B1 and B2 structures of FeO, and explain why no transition has yet been observed in room-temperature static experiments up to 220 GPa, whereas a transition to a metallic, and possibly B2, phase has been observed at 70 GPa and high temperature. We predict that a transition to a metallic B2 structure will occur from a rhombohedrally strained B1 metallic phase near 500 GPa, provided no further distortions to lower symmetry occur in the rhombohedral lattice. C1 CARNEGIE INST WASHINGTON,CTR HIGH PRESSURE RES,WASHINGTON,DC 20015. CARNEGIE INST WASHINGTON,GEOPHYS LAB,WASHINGTON,DC 20015. USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375. RP ISAAK, DG (reprint author), UNIV CALIF LOS ANGELES,INST GEOPHYS & PLANETARY PHYS,LOS ANGELES,CA 90024, USA. RI Cohen, Ronald/B-3784-2010; Singh, David/I-2416-2012; Mehl, Michael/H-8814-2016 OI Cohen, Ronald/0000-0001-5871-2359; NR 52 TC 51 Z9 51 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 APR 1 PY 1993 VL 47 IS 13 BP 7720 EP 7731 DI 10.1103/PhysRevB.47.7720 PG 12 WC Physics, Condensed Matter SC Physics GA KW310 UT WOS:A1993KW31000009 ER PT J AU KIM, CC BELL, MI MCKEOWN, DA AF KIM, CC BELL, MI MCKEOWN, DA TI VIBRATIONAL ANALYSIS OF BENITOITE (BATISI3O9) AND THE SI3O9 RING SO PHYSICAL REVIEW B LA English DT Article AB The normal modes of vibration and their frequencies are calculated for benitoite, a mineral whose crystal structure (space group D3h2) consists of three-membered silicate rings (Si3O9) linked by Ba and Ti4+ ions. Factor-group analysis dictates that certain normal modes involve the motion of only the ring atoms. On the assumption that mode mixings and splittings due to inter-ring interactions are small, the normal frequencies of the isolated ring of C3h symmetry are determined by fitting to suitable averages of selected frequencies in the Raman spectra. A valence force potential consisting of only central interactions between nearest neighbors and bond-bending interactions centered at the silicon atoms is used. This potential is then extended to the full crystal structure by including interactions involving the Ba 2+ and Ti4+ ions. The frequencies obtained are in excellent agreement with the infrared and Raman spectra, requiring only minor adjustment of the force constants obtained for the isolated ring. The identification of normal modes characteristic of three-membered silicate rings may prove to be a valuable guide in the interpretation of the infrared and Raman spectra of amorphous silicates, potentially leading to new information on the ring statistics of these materials. C1 HOWARD UNIV,DEPT CHEM,WASHINGTON,DC 20059. RP KIM, CC (reprint author), USN,RES LAB,DYNAM SOLIDS BRANCH,CODE 6680,WASHINGTON,DC 20375, USA. NR 27 TC 21 Z9 21 U1 1 U2 11 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 APR 1 PY 1993 VL 47 IS 13 BP 7869 EP 7877 DI 10.1103/PhysRevB.47.7869 PG 9 WC Physics, Condensed Matter SC Physics GA KW310 UT WOS:A1993KW31000022 ER PT J AU DELMORAL, A ARNAUDAS, JI GEHRING, PM SALAMON, MB RITTER, C JOVEN, E CULLEN, J AF DELMORAL, A ARNAUDAS, JI GEHRING, PM SALAMON, MB RITTER, C JOVEN, E CULLEN, J TI MAGNETIC 1ST-ORDER PHASE-TRANSITION AND CROSSOVER ASSOCIATED WITH RANDOM ANISOTROPY IN CRYSTALLINE DYXY1-XAL2 SO PHYSICAL REVIEW B LA English DT Article ID RANDOM UNIAXIAL ANISOTROPY; INTERMETALLIC COMPOUNDS; AMORPHOUS MAGNETS; RANDOM-FIELDS; SPIN-GLASS; SYSTEMS; SUSCEPTIBILITY; (DYXY1-X)AL2; BEHAVIOR AB The low-temperature (T = 0 K) first-order phase transition, predicted to drive systems with both weak random and uniform cubic anisotropy from a correlated spin glass to a ferromagnet, has been observed. At higher temperatures the transition is to a quasi- or random ferromagnet. The transition occurs at a concentration x(t) = 0. 62 +/- 0.01 in the crystalline Laves-phase compounds DyxY1-xAl2. At concentrations above x(t), a line of transition is observed between the paramagnetic and random ferromagnetic phases, as found previously. This line is characterized by the crossover exponent phi(DELTA) = 0.80 +/- 0.08, in good agreement with prediction. Two multicritical points have been identified at x(t) = 0. 62 +/- 0.01, T(t) = 29.5 +/- 0.1 K and at around x(t)' = 0. 87, T(t)' = 45.4 K. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801. INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE. UNIV ZARAGOZA,INST CIENCIA MAT ARAGON,E-50009 ZARAGOZA,SPAIN. USN,CTR SURFACE WARFARE,MAGNET GRP,SILVER SPRING,MD 20903. CSIC,E-50009 ZARAGOZA,SPAIN. RP DELMORAL, A (reprint author), UNIV ZARAGOZA,DEPT FIS MAT CONDENSADA,MAGNETISMO LAB,E-50009 ZARAGOZA,SPAIN. RI Arnaudas, Jose/B-4702-2008; OI Arnaudas, Jose/0000-0002-2624-6004; Gehring, Peter/0000-0002-9236-2046 NR 20 TC 8 Z9 8 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 APR 1 PY 1993 VL 47 IS 13 BP 7892 EP 7896 DI 10.1103/PhysRevB.47.7892 PG 5 WC Physics, Condensed Matter SC Physics GA KW310 UT WOS:A1993KW31000025 ER PT J AU JACOBSEN, RL TRITT, TM EHRLICH, AC GILLESPIE, DJ AF JACOBSEN, RL TRITT, TM EHRLICH, AC GILLESPIE, DJ TI ELASTIC PROPERTIES OF BI2SR2CACU2OX WHISKERS SO PHYSICAL REVIEW B LA English DT Note ID SINGLE-CRYSTAL BI2SR2CACU2OY; CA-CU OXIDE; STRUCTURAL INSTABILITY; MICROSCOPY AB This study reports vibrating-reed measurements of Young's modulus and internal friction made as a function of temperature, from 50-400 K, on single-crystal whiskers of Bi2Sr2CaCU2Ox with T(c) almost-equal-to 75 K. The modulus along a is found to be lower than any earlier reported value for this material. Comparisons are made to results of previous work conducted by different methods and on platelet samples with higher T(c). RP JACOBSEN, RL (reprint author), USN,RES LAB,MAT PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 17 TC 18 Z9 18 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 APR 1 PY 1993 VL 47 IS 13 BP 8312 EP 8315 DI 10.1103/PhysRevB.47.8312 PG 4 WC Physics, Condensed Matter SC Physics GA KW310 UT WOS:A1993KW31000083 ER PT J AU LIU, AY SINGH, DJ AF LIU, AY SINGH, DJ TI ELASTIC INSTABILITY OF BCC COBALT SO PHYSICAL REVIEW B LA English DT Article ID ELECTRONIC-STRUCTURE; BRILLOUIN-ZONE; MAGNETIC-PROPERTIES; SPECIAL POINTS; TOTAL-ENERGY; BAND THEORY; CO; GROWTH; ALLOYS; FILMS AB General-potential linearized-augmented-plane-wave calculations of the elastic properties of body-centered cubic Co are presented. The bcc structural phase of Co, which is not found in nature, is calculated to be unstable with respect to a volume-conserving tetragonal distortion. The total energy of body-centered tetragonal Co decreases monotonically as the c/a ratio is varied from 1, which corresponds to the bcc structure, to square-root 2, which corresponds to the face-centered-cubic structure. This means that bcc Co is not a true metastable phase of bulk Co and suggests that the existing samples of bcc Co that have been grown in the laboratory are stabilized by interactions with the substrate and/or defects. RP LIU, AY (reprint author), USN,RES LAB,COMPLEX SYST THEORY BRANCH,WASHINGTON,DC 20375, USA. RI Singh, David/I-2416-2012; Liu, Amy/E-2266-2015 OI Liu, Amy/0000-0002-2011-1854 NR 33 TC 60 Z9 60 U1 0 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 APR 1 PY 1993 VL 47 IS 14 BP 8515 EP 8517 DI 10.1103/PhysRevB.47.8515 PG 3 WC Physics, Condensed Matter SC Physics GA KX046 UT WOS:A1993KX04600014 ER PT J AU RYAN, JC RAJAGOPAL, AK AF RYAN, JC RAJAGOPAL, AK TI VORTEX-LATTICE SOLUTIONS OF THE MICROSCOPIC GORKOV EQUATIONS FOR A TYPE-II SUPERCONDUCTOR IN A STRONG QUANTIZING MAGNETIC-FIELD SO PHYSICAL REVIEW B LA English DT Article ID QUANTIZATION AB We derive solutions of the Gorkov equations for a type-II superconductor using the fact that the vortex lattice is a consequence of translation and gauge covariance. We thus generalize the Abrikosov solutions of the vortex lattice to include Cooper pairing in higher-order Landau indices relevant to low temperatures and high quantizing second critical fields where the semiclassical assumptions of the Ginzburg-Landau theory break down. Detailed calculations of the pairing amplitudes are presented for triangular and square lattices in a diagonal Landau-state approximation illustrating the effects of temperature and magnetic field on the vortex lattices. These solutions are also of interest because they give a purely microscopic view of the vortex lattice and the correlations responsible for it. RP RYAN, JC (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 24 TC 22 Z9 22 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 APR 1 PY 1993 VL 47 IS 14 BP 8843 EP 8850 DI 10.1103/PhysRevB.47.8843 PG 8 WC Physics, Condensed Matter SC Physics GA KX046 UT WOS:A1993KX04600057 ER PT J AU APRUZESE, JP AF APRUZESE, JP TI ESCAPE TIME OF HELIUM-LIKE-ALPHA RESONANCE-LINE PHOTONS EMITTED FROM OPTICALLY THICK PLASMAS SO PHYSICAL REVIEW E LA English DT Article ID SOFT-X-RAY; ULTRAVIOLET-RADIATION; LASER; ALUMINUM; PULSES; IONS; PROBABILITIES; GENERATION; EQUATIONS; PROFILES AB The heliumlike alpha resonance line is one of the strongest and most frequently observed transitions in plasma spectroscopy. In optically thick plasmas of moderate density, photons emitted in this line typically undergo many absorptions and reemissions before escaping. In the present investigation the time required for this process to occur in aluminum plasma is calculated by numerical solution of the time-dependent equation of radiative transfer, in which the photon transit time between interactions is taken into account. An analytic model is also developed in which the collisional quenching probability is parametrized in terms of an equivalent two-level atom. This model facilitates interpretation of the numerical results and permits economical estimates of the escape time for different plasma elements and conditions. One practical implication of these results is that a subpicosecond x-ray pulse from a femtosecond laser-produced high-density plasma can be broadened by multiple scattering if it propagates into a moderate-density preformed plasma. RP APRUZESE, JP (reprint author), USN,RES LAB,DIV PLASMA PHYS,RADIAT HYDRODYNAM BRANCH,WASHINGTON,DC 20375, USA. NR 37 TC 11 Z9 11 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD APR PY 1993 VL 47 IS 4 BP 2798 EP 2805 DI 10.1103/PhysRevE.47.2798 PG 8 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA KZ507 UT WOS:A1993KZ50700075 ER PT J AU UHM, HS PARK, GS ARMSTRONG, CM AF UHM, HS PARK, GS ARMSTRONG, CM TI A THEORY OF CAVITY EXCITATION BY MODULATED ELECTRON-BEAM IN CONNECTION WITH APPLICATION TO A KLYSTRON AMPLIFIER SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID GENERATION; POWER AB Based on an equivalent circuit representation of a cavity impedance, a theoretical model of the cavity excitation by a modulated electron beam is developed. The beam current modulation is initiated by the first cavity and amplified in drift section between the first and second cavities. Properties of the second cavity excitation by the beam are described in terms of the phase shift PSI and amplitude phi2 of induced voltage in the cavity. The phase shift PSI and amplitude phi2 are determined in terms of the frequency difference (eta), the cavity Q value, the voltage multiplication factor (chi), and magnitude (phi1) of the first cavity voltage. The voltage multiplication factor is proportional to the beam intensity, Q value, and distance between the first and second cavities. On the other hand, it is inversely proportional to frequency and capacitance of the cavity, and beam electron velocity. Because the induced voltage in the second cavity is in phase with the first cavity voltage at upshifted cavity frequency, amplitude of the current modulation at the upshifted frequency is larger than that at the downshifted cavity frequency. Experimental study is carried out by making use of a klystron amplifier operable from 4.4 to 5 GHz. Experimental data from the klystron agree remarkably well with amplifier performance profiles predicted by the theory. C1 USN,RES LAB,WASHINGTON,DC 20375. RP UHM, HS (reprint author), USN,CTR SURFACE WARFARE,10901 NEW HAMPSHIRE AVE,SILVER SPRING,MD 20903, USA. RI Park, Gunsik/A-1415-2014 NR 8 TC 26 Z9 29 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD APR PY 1993 VL 5 IS 4 BP 1349 EP 1357 DI 10.1063/1.860924 PG 9 WC Physics, Fluids & Plasmas SC Physics GA KW306 UT WOS:A1993KW30600029 ER PT J AU DEA, JY HANSEN, PM BOERNER, WM AF DEA, JY HANSEN, PM BOERNER, WM TI LONG-TERM ELF BACKGROUND-NOISE MEASUREMENTS, THE EXISTENCE OF WINDOW REGIONS, AND APPLICATIONS TO EARTHQUAKE PRECURSOR EMISSION STUDIES SO PHYSICS OF THE EARTH AND PLANETARY INTERIORS LA English DT Article; Proceedings Paper CT SYMP ON SEISMO-ELECTROMAGNETIC EFFECTS, AT THE 20TH GENERAL ASSEMBLY OF THE INTERNATIONAL UNION OF GEODESY AND GEOPHYSICS CY AUG 11-24, 1991 CL VIENNA, AUSTRIA SP INT UNION GEODESY & GEOPHYS, INT ASSOC GEOMAGNETISM & AERON, INT ASSOC SEISMOL & PHYS EARTHS INTERIOR ID LOW-ALTITUDE SATELLITE; SIGNATURES AB A Low Frequency Monitoring Network has been under development at Naval Command, Control and Ocean Surveillance Center (NCCOSC), Research, Development, Test and Evaluation Division (RDT & E), San Diego, CA, for the last 2 years. Originally developed to monitor space vehicle induced signatures in the 5-12 Hz region, the network now includes monitoring of anomolous broadband signals in the 0.1-20 Hz region that often precede the occurrence of nearby earthquakes. Observations of such events have led to a hypothesis that geological signals are normally present in the ULF (ultra-low frequency, less than 3 Hz) and ELF (extremely low frequency, 3-3000 Hz) bands in addition to the generally accepted signals from micropulsations and lightning discharges. In Southern California, the geological signals are best observed in the 'polarimetric window' regions of (i) 2-5 Hz using horizontally oriented magnetic sensors and, (ii) 2-20 Hz using vertically oriented magnetic sensors. To determine the significance of anomolous events, we conducted a statistical study of the background noise levels. Observations of daily records over a span of several months indicated that the background level in the 1-20 Hz region is stationary. Stationarity is not true below 1 Hz. The APD (amplitude probability density) of 2-12 Hz signals was found to be surprisingly close to a Gaussian distribution. These two results indicated that a determination of long-term averages and variances would be meaningful. Long-term averages and variances were obtained and were used to develop alert-level criteria. Typical deviations over the course of several hours are 1 to 2 dB. The alert-level criteria are used as input parameters in our Automated Monitoring System (AMS), a computerized monitoring and real-time analysis system. The alert levels warn the operator when unusual events are occurring. High alert-levels in conjunction with the fulfilment of several other conditions often presage the occurrence of an earthquake. These other conditions include: (i) persistence of the elevation of the signals; (ii) the existence of resonance lines in the window region of the power spectrum; (iii) the Schumann peaks remaining relatively normal. Several examples of broadband precursor emissions are shown as well as a table listing all nearby moderate/large quakes that occurred during the research period and the correlations with our data base. The table showed that the periods preceding nearby quakes are usually associated with higher than average background levels in the 3-4 Hz region. The general conclusions are that more systematic research is needed, many more monitoring stations are needed, and full tri-axial electric and magnetic monitoring are required. C1 UNIV ILLINOIS,COMMUN & SENSING LAB,CHICAGO,IL 60680. RP DEA, JY (reprint author), USN,CTR CONTROL & OCEAN SURVEILLANCE,DIV RDT&E,COMMUN SYST DEV BRANCH,SAN DIEGO,CA 92152, USA. NR 28 TC 11 Z9 12 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0031-9201 J9 PHYS EARTH PLANET IN JI Phys. Earth Planet. Inter. PD APR PY 1993 VL 77 IS 1-2 BP 109 EP 125 DI 10.1016/0031-9201(93)90037-A PG 17 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KX391 UT WOS:A1993KX39100010 ER PT J AU CUSACK, JR MALANEY, KR DEPRY, DL AF CUSACK, JR MALANEY, KR DEPRY, DL TI INSIGHTS ABOUT PATHOLOGICAL GAMBLERS - CHASING LOSSES IN SPITE OF THE CONSEQUENCES SO POSTGRADUATE MEDICINE LA English DT Article AB In the united states, a small but growing portion of the adult population are pathological gamblers. The majority are men (about one third are women). Although the Diagnostic and Statistical Manual of Mental Disorders, third revised edition, defines pathological gambling as a disorder of impulse control, diagnostic criteria and treatment are modeled after psychoactive substance dependence. About half of pathological gamblers have a history of alcoholism or sub stance abuse an accompanying mood disorders (eg, major depression, bipolar disorder) are common. Once diagnosed, pathological gambling is highly treatable. RP CUSACK, JR (reprint author), USN,1072 DELEISSELINE BLVD,MT PLEASANT,SC 29464, USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU MCGRAW HILL HEALTHCARE PUBLICATIONS PI MINNEAPOLIS PA 4530 WEST 77TH ST, MINNEAPOLIS, MN 55435-5000 SN 0032-5481 J9 POSTGRAD MED JI Postgrad. Med. PD APR PY 1993 VL 93 IS 5 BP 169 EP & PG 0 WC Medicine, General & Internal SC General & Internal Medicine GA KW829 UT WOS:A1993KW82900010 PM 8460075 ER PT J AU LOCKHART, JM AF LOCKHART, JM TI THE CONJUGACY PROBLEM FOR GRAPH PRODUCTS WITH FINITE CYCLIC EDGE GROUPS SO PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY LA English DT Article AB Finite graph products of groups with solvable conjugacy problem and with finite cyclic edge groups are considered. It is shown that the graph product has solvable conjugacy problem if each of the vertex groups has solvable conjugacy problem. RP LOCKHART, JM (reprint author), USN ACAD,DEPT MATH,ANNAPOLIS,MD 21402, USA. NR 2 TC 1 Z9 1 U1 0 U2 0 PU AMER MATHEMATICAL SOC PI PROVIDENCE PA 201 CHARLES ST, PROVIDENCE, RI 02940-2213 SN 0002-9939 J9 P AM MATH SOC JI Proc. Amer. Math. Soc. PD APR PY 1993 VL 117 IS 4 BP 897 EP 898 DI 10.2307/2159513 PG 2 WC Mathematics, Applied; Mathematics SC Mathematics GA KT226 UT WOS:A1993KT22600004 ER PT J AU SAVARINO, SJ FASANO, A WATSON, J MARTIN, BM LEVINE, MM GUANDALINI, S GUERRY, P AF SAVARINO, SJ FASANO, A WATSON, J MARTIN, BM LEVINE, MM GUANDALINI, S GUERRY, P TI ENTEROAGGREGATIVE ESCHERICHIA-COLI HEAT-STABLE ENTEROTOXIN-1 REPRESENTS ANOTHER SUBFAMILY OF ESCHERICHIA-COLI HEAT-STABLE TOXIN SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE DIARRHEA; BACTERIAL PATHOGENESIS ID AMINO-ACID-SEQUENCE; ENTERO-TOXIN; PERSISTENT DIARRHEA; GUANYLATE-CYCLASE; ION-TRANSPORT; INVITRO; INTESTINE AB Enteroaggregative Escherichia coli (EAggEC) are associated with persistent diarrhea in young children. Some of these organisms produce a low-molecular-weight, heat-stable, plasmid-encoded enterotoxin that has been named EAggEC heat-stable enterotoxin 1 (EAST1). We have cloned a 4.4-kb DNA fragment from the virulence plasmid of prototype EAggEC strain 17-2, which expresses enterotoxic activity as measured by electrogenic response in Ussing chambers mounted with rabbit ileal tissue. DNA-sequence analysis of this fragment identified an open reading frame (ORF) encoding a cysteine-rich polypeptide of 38 amino acids (M(r), 4100). Insertional and deletional mutations in this ORF resulted in loss of enterotoxic activity. The ORF was cloned into a T7 expression vector, and postinduction culture filtrates exhibited enterotoxic activity and increased ileal tissue cGMP levels. A synthetic peptide consisting of predicted amino acid residues 8-29 also showed enterotoxic activity. These data indicate that this ORF, named ast4 (EAggEC heat-stable enterotoxin), represents the EAST1 structural gene. EAST1 shows significant homology with the enterotoxic domain of heat-stable enterotoxin a (STa) of enterotoxigenic E. coli and with guanylin, a mammalian analog of STa. Unlike STa, which requires six cysteines and three disulfide linkages for full biological activity, both EASTI and guanylin contain four cysteine residues. Based on the cGMP data and the sequence homology to STa and guanylin, it is predicted that EAST1 stimulates the particulate form of guanylate cyclase through the same receptor-binding region as STa and guanylin. C1 FAC MED & CHIRURG CATANZARO,INST SCI PEDIAT & GINECOL,I-88100 CATANZARO,ITALY. NIMH,CLIN NEUROSCI BRANCH,BETHESDA,MD 20892. UNIV MARYLAND,SCH MED,DEPT MED,DIV GEOG MED,CTR VACCINE DEV,BALTIMORE,MD 21201. RP SAVARINO, SJ (reprint author), USN,MED RES INST,ENTER DIS PROGRAM,BETHESDA,MD 20892, USA. NR 33 TC 179 Z9 185 U1 0 U2 2 PU NATL ACAD SCIENCES 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 APR 1 PY 1993 VL 90 IS 7 BP 3093 EP 3097 DI 10.1073/pnas.90.7.3093 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KV975 UT WOS:A1993KV97500111 PM 8385356 ER PT J AU FULL, WE EPPLER, DT AF FULL, WE EPPLER, DT TI EVALUATION OF MULTICHANNEL WIENER FILTERS APPLIED TO FINE RESOLUTION PASSIVE MICROWAVE IMAGES OF 1ST-YEAR SEA ICE SO REMOTE SENSING OF ENVIRONMENT LA English DT Article AB Over the past two decades passive microwave imaging systems have proven to be effective reconnaissance tools in polar environments. However, the mechanical scan mechanism and high gain electronics characteristic of this class of sensors commonly impart noise and unwanted artifacts to image data they produce, complicating visual analysis and automated classification procedures. The fact that data in individual scan lines are characterized by statistical stationarity and that information in adjacent pixels is highly correlated due to oversampling of these image data suggests that Wiener multichannel filtering techniques may prove effective in this application. Wiener filters applied to passive microwave images of first-year sea ice were constructed. Four major parameters that define the filter (lag or pixel offset between the original and desired scenes, filter length, number of lines in the filter, and weight applied to the empirical correlation functions) were varied. Results were compared visually to assess the effect of each variable on image quality. Effective filters that limit high frequency noise and enhance ice characteristics use a lag of one pixel, consist of two or three channels, are five pixels in length, and weigh the auto- and cross-correlation functions equally. C1 USN,OCEANOG & ATMOSPHER RES LAB,POLAR OCEANOG BRANCH OFF,HANOVER,NH. RP FULL, WE (reprint author), WICHITA STATE UNIV,FIMTSI,DEPT GEOL,WICHITA,KS 67260, USA. NR 26 TC 1 Z9 1 U1 1 U2 2 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0034-4257 J9 REMOTE SENS ENVIRON JI Remote Sens. Environ. PD APR PY 1993 VL 44 IS 1 BP 1 EP 23 DI 10.1016/0034-4257(93)90099-J PG 23 WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic Technology SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science & Photographic Technology GA KU006 UT WOS:A1993KU00600001 ER PT J AU LEA, SM LYBANON, M AF LEA, SM LYBANON, M TI FINDING MESOSCALE OCEAN STRUCTURES WITH MATHEMATICAL MORPHOLOGY SO REMOTE SENSING OF ENVIRONMENT LA English DT Article AB We introduce a technique to aid in interpreting infrared satellite images of the North Atlantic Ocean Gulf Stream region. Present interpretive methods are largely manual, require significant effort, and are highly dependent on the interpreter's skill. Our quasiautomated technique is based on mathematical morphology, specifically the image transformations of opening and closing, which are defined in terms of erosion and dilation. The implementation performs successive openings and closings at increasing thresholds until a stable division into objects and background is found. This method finds the North Wall of the Gulf Stream in approixmately the same place as human analysts and another automated procedure, and does less smoothing of small irregularities than the other two methods. The North Wall is continuous and sharp except where obscured by clouds. Performance in locating warm-core eddies is also comparable to the other methods. However, the present procedure does not find cold-core rings well. We are presently investigating ways to reduce the effects of clouds and delete the unwanted water areas found by the method. We expect to be able to improve the cold-core eddy performance. C1 USN,RES LAB,REMOTE SENSING BRANCH,BAY ST LOUIS,MS 39529. UNIV N CAROLINA,DEPT MATH,GREENSBORO,NC 27412. NR 24 TC 2 Z9 2 U1 1 U2 1 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0034-4257 J9 REMOTE SENS ENVIRON JI Remote Sens. Environ. PD APR PY 1993 VL 44 IS 1 BP 25 EP 33 DI 10.1016/0034-4257(93)90100-C PG 9 WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic Technology SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science & Photographic Technology GA KU006 UT WOS:A1993KU00600002 ER PT J AU BOULAIS, KA CHOE, JY NAMKUNG, W CHUN, ST CHOI, EH AF BOULAIS, KA CHOE, JY NAMKUNG, W CHUN, ST CHOI, EH TI SYSTEM FOR VELOCITY RATIO MEASUREMENTS OF AN AXIS-ROTATING ELECTRON-BEAM SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID GENERATION AB A novel system to measure the ratio of transverse velocity to axial velocity (alpha) of a low voltage, axis-rotating electron beam is described herein. With the system, more information about the beam can be obtained than from the usual slit/phosphor screen system. Since most of the beam is undisturbed before the phosphor screen, the beam radius and azimuthal symmetry can be quantified in combination with the beam alpha along various axial positions. The diagnostic is applied to a Cusptron microwave tube to measure these electron beam parameters which are important for high tube efficiency. Two magnetic field profiles are used to study various causes of low beam quality, while a third profile is used in attempt to maintain a high quality beam. By using the described system, it is shown that the third profile significantly increases beam quality. The system can easily be extended to higher energy beams with an appropriate scintillator. C1 POHANG INST SCI & TECHNOL,POHANG,SOUTH KOREA. RP BOULAIS, KA (reprint author), USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903, USA. NR 11 TC 0 Z9 0 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 APR PY 1993 VL 64 IS 4 BP 958 EP 961 DI 10.1063/1.1144149 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA KX401 UT WOS:A1993KX40100019 ER PT J AU ROBINSON, KM OGRADY, WE AF ROBINSON, KM OGRADY, WE TI A TRANSMISSION GEOMETRY ELECTROCHEMICAL-CELL FOR INSITU X-RAY-DIFFRACTION SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID SCATTERING MEASUREMENTS; RECONSTRUCTED SURFACES; GOLD SURFACES; AU(110)-(1X2); STABILITY AB High intensity synchrotron x-ray radiation has increased the feasibility of studying the solid-liquid interface in situ. Recent work on the structure of Au single crystal electrodes has shown the need to merge appropriate electrochemical cell designs to work on standard four-circle diffractometers. In this report, a new electrochemical cell is described for use in in situ structure determination. The cell provides excellent electrochemical control of the electrode surface, as determined by the cyclic voltammagram, in conjunction with the x-ray studies. RP ROBINSON, KM (reprint author), USN,RES LAB,DIV CHEM,CODE 6170,WASHINGTON,DC 20375, USA. NR 21 TC 25 Z9 25 U1 1 U2 2 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 APR PY 1993 VL 64 IS 4 BP 1061 EP 1065 DI 10.1063/1.1144178 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA KX401 UT WOS:A1993KX40100037 ER PT J AU VASUDEVAN, AK SADANANDA, K AF VASUDEVAN, AK SADANANDA, K TI FATIGUE CRACK-GROWTH IN METAL MATRIX COMPOSITES SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID ALLOYS C1 USN,RES LAB,WASHINGTON,DC 20375. RP VASUDEVAN, AK (reprint author), OFF NAVAL RES,CODE 122R2,800 N QUINCY ST,ARLINGTON,VA 22217, USA. NR 23 TC 17 Z9 17 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 APR 1 PY 1993 VL 28 IS 7 BP 837 EP 842 DI 10.1016/0956-716X(93)90362-V PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KP644 UT WOS:A1993KP64400013 ER PT J AU RICHARDSON, GE JOHNSON, BE AF RICHARDSON, GE JOHNSON, BE TI THE BIOLOGY OF LUNG-CANCER SO SEMINARS IN ONCOLOGY LA English DT Review ID HUMAN SMALL-CELL; EPIDERMAL GROWTH-FACTOR; GASTRIN-RELEASING PEPTIDE; NEOPLASTIC CEREBELLAR DEGENERATION; EATON MYASTHENIC SYNDROME; NEURON-SPECIFIC ENOLASE; RETINOBLASTOMA SUSCEPTIBILITY GENE; K-RAS ONCOGENE; BRONCHIAL EPITHELIAL-CELLS; BOMBESIN-LIKE PEPTIDES C1 UNIFORMED SERV UNIV HLTH SCI,DEPT MED,NCI,CLIN ONCOL PROGRAM,USN,MED ONCOL BRANCH,BETHESDA,MD 20814. RP RICHARDSON, GE (reprint author), USN,NATL MED CTR,MED ONCOL BRANCH,NCI,BLDG 8,ROOM 5015,BETHESDA,MD 20889, USA. NR 395 TC 117 Z9 119 U1 1 U2 5 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0093-7754 J9 SEMIN ONCOL JI Semin. Oncol. PD APR PY 1993 VL 20 IS 2 BP 105 EP 127 PG 23 WC Oncology SC Oncology GA KX472 UT WOS:A1993KX47200002 PM 8480184 ER PT J AU GAVER, DP MORRISON, JA SILVEIRA, R AF GAVER, DP MORRISON, JA SILVEIRA, R TI SERVICE-ADAPTIVE MULTITYPE REPAIRMAN PROBLEMS SO SIAM JOURNAL ON APPLIED MATHEMATICS LA English DT Article DE HEAVY-TRAFFIC ASYMPTOTICS; DYNAMIC PRIORITIES; ADAPTIVE CONTROL; LOGISTICS AND REPAIR; FLEXIBLE MANUFACTURING ID HEAVY AB The classical ''repairman problem'' (cf. [Feller, An Introduction to Probability Theory and its Applications, Vol. I, 3rd ed., John Wiley, New York, 1967]) is generalized to consider r failure-prone machine types, each type having its own individual failure rate and repair rate. Each failed machine joins its type queue and is repaired by a single server. Several dynamic service priority schemes are considered that approximate first-come first-served, longest-line first, and least-available first situations. A heavy-traffic asymptotic analysis determines approximations to the time-dependent mean and covariance of individual-type queue lengths and shows that the marginal joint distribution of queue lengths is approximately Ornstein-Uhlenbeck. Numerical illustrations of approximation accuracy are provided, as well as suggested applications to computer performance and manufacturing systems analysis. C1 AT&T BELL LABS,MURRAY HILL,NJ 07974. CTR ANAL SIST NAVAIS,BR-22290 RIO JANEIRO,BRAZIL. RP GAVER, DP (reprint author), USN,POSTGRAD SCH,MONTEREY,CA 93943, USA. NR 11 TC 4 Z9 4 U1 0 U2 0 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 0036-1399 J9 SIAM J APPL MATH JI SIAM J. Appl. Math. PD APR PY 1993 VL 53 IS 2 BP 459 EP 470 DI 10.1137/0153027 PG 12 WC Mathematics, Applied SC Mathematics GA KV412 UT WOS:A1993KV41200009 ER PT J AU DERE, KP MASON, HE AF DERE, KP MASON, HE TI NONTHERMAL VELOCITIES IN THE SOLAR TRANSITION ZONE OBSERVED WITH THE HIGH-RESOLUTION TELESCOPE AND SPECTROGRAPH SO SOLAR PHYSICS LA English DT Article ID QUIET SUN; CORONA; REGION; CHROMOSPHERE; TEMPERATURE; SPECTRA; OSO-8; ABUNDANCES; POWER; LIMB AB Data obtained during the first rocket flight of the NRL High Resolution Telescope and Spectrograph (HRTS) have been used to study nonthermal velocities for spectral lines primarily covering the temperature range 10(4) to 2 x 10(6) K. The high spectral and spatial resolution, combined with an enhanced dynamic intensity range of the reduced data, has enabled us to study the distribution of the nonthermal velocities for quiet and active regions. Average values of the nonthermal velocities peak at about 27 km s-1 at 10(5) K for the quiet regions, with a wide distribution of nonthermal velocities for each line. The active region nonthermal velocities have a narrower distribution which is weighted towards higher values. The SiIV and CIV line profiles are not well described by a single Gaussian, indicating that high-velocity components (above 30 km s-1) are present in the quiet-Sun spectra. The radiative losses for all plasma above 10(5) K have been calculated for the quiet Sun, an active region and a coronal hole. These have been compared with the acoustic wave flux inferred from the nonthermal line widths. There appears to be a sufficient flux of waves to heat these regions of the atmosphere. C1 UNIV CAMBRIDGE, DEPT APPL MATH & THEORET PHYS, CAMBRIDGE CB3 9EW, ENGLAND. RP USN, RES LAB, EO HULBURT CTR SPACE RES, WASHINGTON, DC 20375 USA. NR 44 TC 122 Z9 125 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0038-0938 EI 1573-093X J9 SOL PHYS JI Sol. Phys. PD APR PY 1993 VL 144 IS 2 BP 217 EP 241 DI 10.1007/BF00627590 PG 25 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KT783 UT WOS:A1993KT78300002 ER PT J AU CHIDESTER, PD CONNITO, DJ AF CHIDESTER, PD CONNITO, DJ TI INTERACTION BETWEEN GLIPIZIDE AND CYCLOSPORINE - REPORT OF 2 CASES SO TRANSPLANTATION PROCEEDINGS LA English DT Article RP CHIDESTER, PD (reprint author), USN HOSP,DIV NEPHROL,PORTSMOUTH,VA 23708, USA. NR 11 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0041-1345 J9 TRANSPLANT P JI Transplant. Proc. PD APR PY 1993 VL 25 IS 2 BP 2136 EP 2137 PG 2 WC Immunology; Surgery; Transplantation SC Immunology; Surgery; Transplantation GA KY219 UT WOS:A1993KY21900183 PM 8470294 ER PT J AU TRIETSCH, D AF TRIETSCH, D TI SCHEDULING FLIGHTS AT HUB AIRPORTS SO TRANSPORTATION RESEARCH PART B-METHODOLOGICAL LA English DT Article ID AIRCRAFT; MANAGEMENT AB In a typical hub airport, incoming flights from many origins feed outgoing flights to equally many destinations. If an incoming flight is late, outgoing flights that are fed by it may also be delayed. Alternatively, aircraft may leave before some feeding flights arrive, thereby incurring high misconnection penalties. By optimizing the scheduled ground time of each plane, we can minimize the expected sum of costs and penalties. In this paper we develop generalized newsboy models for this purpose. In particular, we investigate in detail a pure-waiting model in which no misconnections are allowed and discuss a no-waiting model in which aircraft that are ready to leave never wait for late-feeding flights. The models show that to maximize the system level of service at a given cost, the level of service of individual flights should be allowed to vary. The models can also be applied to similar problems such as express parcel deliveries and ground transportation hubs. The problems we address are nonlinear and highly combinatorial, so for life-size problems it is not practical to solve them to optimality. Therefore, an important part of the paper is devoted to heuristic solutions and the promising numerical experience achieved with them. RP TRIETSCH, D (reprint author), USN,POSTGRAD SCH,DEPT ADM SCI,MONTEREY,CA 93943, USA. NR 11 TC 9 Z9 9 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0191-2615 J9 TRANSPORT RES B-METH JI Transp. Res. Pt. B-Methodol. PD APR PY 1993 VL 27 IS 2 BP 133 EP 150 DI 10.1016/0191-2615(93)90004-T PG 18 WC Economics; Engineering, Civil; Operations Research & Management Science; Transportation; Transportation Science & Technology SC Business & Economics; Engineering; Operations Research & Management Science; Transportation GA KW878 UT WOS:A1993KW87800004 ER PT J AU YODER, MN AF YODER, MN TI DIAMOND IN THE USA SO DIAMOND AND RELATED MATERIALS LA English DT Article; Proceedings Paper CT DIAMOND 92 - 3RD INTERNATIONAL CONF ON THE NEW DIAMOND SCIENCE AND TECHNOLOGY / 3RD EUROPEAN CONF ON DIAMOND, DIAMOND-LIKE AND RELATED COMPOUNDS CY AUG 31-SEP 04, 1992 CL HEIDELBERG, GERMANY SP NORTON DIAMOND FILM, NORTHBORO RES CTR, DIAMOND & RELATED MAT, MONSANTO EUROPE, DRUKKER INT, JAPAN NEW DIAMOND FORUM, COMMISS EUROPEAN COMMUNITIES, KOBEL STEEL, MITSUBISHI MAT, SUMIMOTO ELECT IND, DE BEERS IND DIAMOND DIV ID GAS-PHASE; SURFACE; HYDROGEN; DEPOSITION; PARTICLES; METHANE; GROWTH AB Major highlights of the history of diamond in the USA are presented from its embryonic beginnings until the present. New approaches are presented for understanding diamond nucleation and growth. The approaches are seen to be complementary and, if properly integrated, synergistic in nature. RP YODER, MN (reprint author), OFF NAVAL RES,DIV ELECTR,ARLINGTON,VA 22217, USA. NR 37 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-9635 J9 DIAM RELAT MATER JI Diam. Relat. Mat. PD MAR 31 PY 1993 VL 2 IS 2-4 BP 59 EP 64 DI 10.1016/0925-9635(93)90031-V PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA LE620 UT WOS:A1993LE62000002 ER PT J AU FREITAS, JA STROM, U COLLINS, AT AF FREITAS, JA STROM, U COLLINS, AT TI PHOTOLUMINESCENCE AND CATHODOLUMINESCENCE STUDIES OF SEMICONDUCTING DIAMOND SO DIAMOND AND RELATED MATERIALS LA English DT Article; Proceedings Paper CT DIAMOND 92 - 3RD INTERNATIONAL CONF ON THE NEW DIAMOND SCIENCE AND TECHNOLOGY / 3RD EUROPEAN CONF ON DIAMOND, DIAMOND-LIKE AND RELATED COMPOUNDS CY AUG 31-SEP 04, 1992 CL HEIDELBERG, GERMANY SP NORTON DIAMOND FILM, NORTHBORO RES CTR, DIAMOND & RELATED MAT, MONSANTO EUROPE, DRUKKER INT, JAPAN NEW DIAMOND FORUM, COMMISS EUROPEAN COMMUNITIES, KOBEL STEEL, MITSUBISHI MAT, SUMIMOTO ELECT IND, DE BEERS IND DIAMOND DIV AB We have carried out low temperature cathodoluminescence and photoluminescence studies of radiative processes in synthetic and natural boron-doped diamond. The similarities between the cathodoluminescence and photoluminescence emission bands suggest that they originate from the same center. The photoluminescence studies of the synthetic diamond samples reveal the existence of a new emission band around 1.84 eV and a new vibronic band with zero phonon line at 2.395 eV. C1 USN,RES LAB,WASHINGTON,DC 20375. UNIV LONDON KINGS COLL,DEPT PHYS,LONDON WC2R 2LS,ENGLAND. RP FREITAS, JA (reprint author), SACHS FREEMAN ASSOCIATES INC,LANDOVER,MD 20785, USA. NR 16 TC 19 Z9 19 U1 0 U2 4 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-9635 J9 DIAM RELAT MATER JI Diam. Relat. Mat. PD MAR 31 PY 1993 VL 2 IS 2-4 BP 87 EP 91 DI 10.1016/0925-9635(93)90036-2 PG 5 WC Materials Science, Multidisciplinary SC Materials Science GA LE620 UT WOS:A1993LE62000007 ER PT J AU UHM, HS AF UHM, HS TI A NONLINEAR-THEORY OF CURRENT MODULATION IN KLYSTRON AMPLIFIERS SO PHYSICS LETTERS A LA English DT Article ID RELATIVISTIC ELECTRON-BEAMS; GENERATION; POWER AB A closed integro-differential equation for a relativistic electron beam propagating through a klystron amplifier is obtained, assuming that the beam current is a function of time t and Propagation distance z. Magnitudes of the energy and current modulation are determined in terms of the sap voltage, the cavity frequency, geometric configuration, the beam intensity and initial kinetic energy of the beam. An analytical expression of the current modulation for the fundamental mode is derived from the integro-differential equation. RP UHM, HS (reprint author), USN,CTR SURFACE WARFARE,10901 NEW HAMPSHIRE AVE,WHITE OAK,SILVER SPRING,MD 20903, USA. NR 10 TC 4 Z9 4 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 MAR 29 PY 1993 VL 175 IS 1 BP 53 EP 57 DI 10.1016/0375-9601(93)90853-R PG 5 WC Physics, Multidisciplinary SC Physics GA KV326 UT WOS:A1993KV32600011 ER PT J AU CALVERT, JM BRANDOW, SL CHEN, MS DRESSICK, WJ DULCEY, CS KOLOSKI, TS STENGER, DA AF CALVERT, JM BRANDOW, SL CHEN, MS DRESSICK, WJ DULCEY, CS KOLOSKI, TS STENGER, DA TI LITHOGRAPHICALLY PATTERNED SELF-ASSEMBLED FILMS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. UNIV COLORADO,BOULDER,CO 80309. GEOCENTERS INC,FT WASHINGTON,MD 20744. NR 0 TC 1 Z9 1 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 11 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98101320 ER PT J AU SCHNUR, JM RATNA, B PRICE, R SCHOEN, PE SHASHIDHAR, R AF SCHNUR, JM RATNA, B PRICE, R SCHOEN, PE SHASHIDHAR, R TI SELF ASSEMBLING LIPID TUBULES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 13 EP BTEC PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301556 ER PT J AU SELINGER, JV WANG, ZG BRUINSMA, RF AF SELINGER, JV WANG, ZG BRUINSMA, RF TI CHIRAL SYMMETRY-BREAKING IN LANGMUIR MONOLAYERS AND SMECTIC FILMS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. CALTECH,DEPT CHEM ENGN,PASADENA,CA 91125. UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024. RI Selinger, Jonathan/D-1445-2010 OI Selinger, Jonathan/0000-0002-4982-2457 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 39 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98101348 ER PT J AU KAFAFI, ZH AF KAFAFI, ZH TI NONLINEAR OPTICAL-RESPONSE OF NANOSTRUCTURED MATERIALS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 46 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98300652 ER PT J AU COUGHLIN, CS SAMUELS, MQ CAPPS, RN AF COUGHLIN, CS SAMUELS, MQ CAPPS, RN TI DEVELOPMENT OF POLYURETHANE EPOXY INTERPENETRATING NETWORKS AS BROAD-BAND DAMPING MATERIALS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,UNDERWATER SOUND REFERENCE DETACHMENT,ORLANDO,FL 32856. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 59 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98300909 ER PT J AU MCLIN, MG WINTERSGILL, MC FONTANELLA, JJ BROWN, S GREENBAUM, SG AF MCLIN, MG WINTERSGILL, MC FONTANELLA, JJ BROWN, S GREENBAUM, SG TI DEPENDENCE OF SALT PRECIPITATION TEMPERATURE IN NAI PPG ON MW SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN ACAD,DEPT PHYS,ANNAPOLIS,MD 21403. CUNY HUNTER COLL,DEPT PHYS,NEW YORK,NY 10021. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 59 EP PMSE PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301399 ER PT J AU JONES, KM KELLER, TM AF JONES, KM KELLER, TM TI AROMATIC ACETYLENES FOR CARBON MATRIX COMPOSITE-MATERIAL SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,DIV CHEM,MAT CHEM BRANCH,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 65 EP PMSE PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301405 ER PT J AU MCLIN, MG WINTERSGILL, MC FONTANELLA, JJ CHEN, RS JAYAKODY, JP GREENBAUM, SG AF MCLIN, MG WINTERSGILL, MC FONTANELLA, JJ CHEN, RS JAYAKODY, JP GREENBAUM, SG TI DIELECTRIC-RELAXATION MEASUREMENTS AND DEUTERON AND O-17 NMR OF HYDRATED NAFION MEMBRANES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN ACAD,DEPT PHYS,ANNAPOLIS,MD 21402. CUNY HUNTER COLL,DEPT PHYS,NEW YORK,NY 10021. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 77 EP PMSE PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301417 ER PT J AU SINGH, A MARKOWITZ, M TSAO, LI AF SINGH, A MARKOWITZ, M TSAO, LI TI POLYMERIZABLE LIPID ASSEMBLIES IN MOLECULAR RECOGNITION SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 79 EP IEC PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98102244 ER PT J AU MARKOWITZ, MA SINGH, A AF MARKOWITZ, MA SINGH, A TI CONTROLLED RELEASE BEHAVIOR OF POLYMERIZED LIPOSOMES CONSTRUCTED FROM DIACETYLENIC PHOSPHOLIPIDS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 80 EP IEC PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98102245 ER PT J AU PUVVADA, S NAOR, A NIKAS, Y BLANKSCHTEIN, D AF PUVVADA, S NAOR, A NIKAS, Y BLANKSCHTEIN, D TI MICELLIZATION, BULK PHASE-BEHAVIOR, AND INTERFACIAL PROPERTIES OF SOLUTIONS CONTAINING FLUOROCARBON-BASED SURFACTANTS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. MIT,DEPT CHEM ENGN,CAMBRIDGE,MA 02139. MIT,CTR MAT SCI & ENGN,CAMBRIDGE,MA 02139. NR 2 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 126 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98101435 ER PT J AU HICKMAN, JJ FOSTER, K STENGER, DA SCHAFFNER, A BARKER, J AF HICKMAN, JJ FOSTER, K STENGER, DA SCHAFFNER, A BARKER, J TI THE USE OF MONOLAYERS AS TEMPLATES FOR BIOCOMPATIBILITY STUDIES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SCI APPLICAT INT CORP,MCLEAN,VA 22102. USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NINCDS,DIR,BNP,NEUROPHYSIOL LAB,BETHESDA,MD 20892. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 146 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98101455 ER PT J AU ROLAND, CM SANTANGELO, PG CHOI, IS MILLER, JB AF ROLAND, CM SANTANGELO, PG CHOI, IS MILLER, JB TI ORIENTATION AND MECHANICAL RESPONSE OF ELASTOMERS CONTAINING DOUBLE NETWORKS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 146 EP PMSE PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301486 ER PT J AU WYNNE, KJ AF WYNNE, KJ TI SURFACE-PROPERTIES OF POLYDIMETHYLSILOXANE-UREA-URETHANE COPOLYMERS WITH 1,4-BENZENEDIMETHANOL AS CHAIN EXTENDER SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OFF NAVAL RES,DIV CHEM,ARLINGTON,VA 22217. USN,RES LAB,MAT CHEM BRANCH,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 165 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301015 ER PT J AU GEER, RE QADRI, SB SHASHIDHAR, R THIBODEAUX, A DURAN, RS AF GEER, RE QADRI, SB SHASHIDHAR, R THIBODEAUX, A DURAN, RS TI X-RAY-INVESTIGATIONS OF LANGMUIR-BLODGETT MULTILAYER FILMS OF LIQUID-CRYSTAL COPOLYMERS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI ENGN,CODE 6900,WASHINGTON,DC 20375. UNIV FLORIDA,CTR MACROMOLEC SCI,GAINESVILLE,FL 32611. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 174 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98101483 ER PT J AU SNOW, AW PACE, MD AF SNOW, AW PACE, MD TI SPIN LABELED POLYMERS FOR COMPOSITE INTERFACE STUDIES - SYNTHESIS AND CHARACTERIZATION SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 180 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301030 ER PT J AU BUTLER, JE WOODIN, RL AF BUTLER, JE WOODIN, RL TI MECHANISMS OF DIAMOND CVD SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,CODE 6174,WASHINGTON,DC 20375. NORTON DIAMOND FILMS,NORTHBOROUGH,MA 01532. RI Butler, James/B-7965-2008 OI Butler, James/0000-0002-4794-7176 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 186 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98101495 ER PT J AU THOMS, BD PEHRSSON, PE BUTLER, JE AF THOMS, BD PEHRSSON, PE BUTLER, JE TI ATOMIC-HYDROGEN AND DEUTERIUM ADSORPTION AND ABSTRACTION ON POLYCRYSTALLINE DIAMOND SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,CODE 6174,WASHINGTON,DC 20375. RI Butler, James/B-7965-2008 OI Butler, James/0000-0002-4794-7176 NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 188 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98101497 ER PT J AU STENGER, D LIGLER, F BHATIA, S SCHOEN, P HICKMAN, J PEEK, B CRIBBS, D AF STENGER, D LIGLER, F BHATIA, S SCHOEN, P HICKMAN, J PEEK, B CRIBBS, D TI 2-DIMENSIONAL PATTERNING OF BIOMOLECULES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,CODE 6900,WASHINGTON,DC 20375. ST MARYS COLL MARYLAND,ST MARYS CITY,MD 20686. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 192 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98101501 ER PT J AU MCCLEAN, RE NELSON, HH CAMPBELL, ML AF MCCLEAN, RE NELSON, HH CAMPBELL, ML TI KINETICS OF THE REACTION AL(P-2(1/2)0+H2O SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. USN ACAD,DEPT CHEM,ANNAPOLIS,MD 21402. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 207 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98300813 ER PT J AU HU, HSW GRIFFITH, JR AF HU, HSW GRIFFITH, JR TI PROCESSABLE FLUOROPOLYMERS WITH LOW DIELECTRIC-CONSTANTS - PREPARATION AND STRUCTURE-PROPERTY RELATIONSHIPS OF POLYACRYLATES AND POLYMETHACRYLATES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 211 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301061 ER PT J AU HONEYCHUCK, RV CRUGER, TW MILLIKEN, J AF HONEYCHUCK, RV CRUGER, TW MILLIKEN, J TI VAPOR-PRESSURE OSMOMETRY STUDIES ON BUCKMINSTERFULLERENE SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,MAT CHEM BRANCH,WASHINGTON,DC 20375. GEORGE MASON UNIV,DEPT CHEM,FAIRFAX,VA 22030. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 214 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98300820 ER PT J AU CALLAHAN, JH NELSON, H MCELVANY, SW ROSS, MM AF CALLAHAN, JH NELSON, H MCELVANY, SW ROSS, MM TI TANDEM MASS-SPECTROMETRY STUDIES OF METALLOFULLERENES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 217 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98300823 ER PT J AU TURNER, NH CAMPBELL, FJ BRUNING, AM KASTURE, DG AF TURNER, NH CAMPBELL, FJ BRUNING, AM KASTURE, DG TI SURFACE CHEMICAL-CHANGES OF POLYMER CAVITIES FROM ELECTRICAL-DISCHARGE SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LECTROMECH DESIGN CO,HERNDON,VA 22071. USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 253 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98101561 ER PT J AU KELLER, TM AF KELLER, TM TI 6F-MULTIPLE AROMATIC ETHER PHTHALONITRILE RESIN SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,DIV CHEM,MAT CHEM BRANCH,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 254 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301104 ER PT J AU BRANDOW, SL DRESSICK, WJ DULCEY, CS CALVERT, JM AF BRANDOW, SL DRESSICK, WJ DULCEY, CS CALVERT, JM TI AFM STUDY OF THE EVOLUTION OF A SELECTIVELY BOUND PD CATALYST SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. UNIV COLORADO,DEPT CHEM,BOULDER,CO 80309. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 263 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98101571 ER PT J AU DRESSICK, WJ KOLOSKI, TS DULCEY, CS CALVERT, JM GEORGER, JH AF DRESSICK, WJ KOLOSKI, TS DULCEY, CS CALVERT, JM GEORGER, JH TI SELECTIVE ELECTROLESS METALLIZATION OF PHOTOPATTERNED CHEMISORBED LIGATING ORGANOSILANE MONOLAYERS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 GEO CENTERS INC,FT WASHINGTON,MD 20744. USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 264 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98101572 ER PT J AU DULCEY, CS CALVERT, JM CHEN, MS DRESSICK, WJ KOLOSKI, TS AF DULCEY, CS CALVERT, JM CHEN, MS DRESSICK, WJ KOLOSKI, TS TI HIGH QUANTUM YIELD PHOTOCHEMISTRY OF SELF-ASSEMBLED MONOLAYERS FOR SUBMICRON LITHOGRAPHY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 GEO CENTERS INC,FT WASHINGTON,MD 20744. USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 267 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98101575 ER PT J AU KIM, OK CHOI, LS AF KIM, OK CHOI, LS TI SUPRAMOLECULAR ORDERING IN AMYLOSE INCLUSION COMPLEXES OF PHOTOREACTIVE MOLECULES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 337 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301187 ER PT J AU PURDY, AP BERRY, AD AF PURDY, AP BERRY, AD TI STUDIES OF INDIUM AMIDES AND NITRIDES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 349 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98102701 ER PT J AU HENDERSON, LJ KELLER, TM AF HENDERSON, LJ KELLER, TM TI THERMALLY AND OXIDATIVELY STABLE CARBORANE-SILOXANE-ACETYLENIC-BASED THERMOSETTING POLYMERS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,DIV CHEM,MAT CHEM BRANCH,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 370 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301220 ER PT J AU PURDY, AP AF PURDY, AP TI REACTIONS BETWEEN CYANURIC CHLORIDE AND DICYANAMIDES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 402 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98102754 ER PT J AU GONSALVES, K XIAO, TD CHOW, GM CHEN, X STRUTT, PR AF GONSALVES, K XIAO, TD CHOW, GM CHEN, X STRUTT, PR TI SYNTHESIS OF NANOCOMPOSITES VIA INORGANIC POLYMERIC GELS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. UNIV CONNECTICUT,STORRS,CT 06269. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 405 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301256 ER PT J AU LINDSAY, GA STENGERSMITH, JA HENRY, RA CHAFIN, AP HERMAN, WN HAYDEN, LM AF LINDSAY, GA STENGERSMITH, JA HENRY, RA CHAFIN, AP HERMAN, WN HAYDEN, LM TI POLAR ORDER IN FOLDED BACKBONE POLYMERS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NAWC WPNS,CHINA LAKE,CA 93555. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 472 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ983 UT WOS:A1993KQ98301323 ER PT J AU HENRY, RL NORDQUIST, PER GORMAN, RJ AF HENRY, RL NORDQUIST, PER GORMAN, RJ TI VERTICAL ZONE MELT GROWTH OF GAAS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 517 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98102868 ER PT J AU DESISTO, WJ HENRY, RL NEWMAN, HS CESTONE, VC AF DESISTO, WJ HENRY, RL NEWMAN, HS CESTONE, VC TI METALORGANIC CHEMICAL VAPOR-DEPOSITION OF YBA2CU3O7-DELTA SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 519 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98102870 ER PT J AU COVINO, J AF COVINO, J TI SYNTHESIS AND CHARACTERIZATION OF ADVANCED MATERIALS FOR NAVY APPLICATIONS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USN,CTR AIR WARFARE,DIV WEAP,CHINA LAKE,CA 93555. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 28 PY 1993 VL 205 BP 523 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA KQ981 UT WOS:A1993KQ98102874 ER PT J AU HUBA, JD ROWLAND, HL AF HUBA, JD ROWLAND, HL TI PROPAGATION OF ELECTROMAGNETIC-WAVES PARALLEL TO THE MAGNETIC-FIELD IN THE NIGHTSIDE VENUS IONOSPHERE SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID PLASMA; ORBITER; SIGNALS AB A theoretical and numerical analysis of the propagation of electromagnetic waves in the nightside Venus ionosphere is presented. The special case of propagation parallel to the magnetic field is considered. The model assumes a source of electromagnetic radiation in the Venus atmosphere, such as produced by lightning, and specifically addresses wave propagation for realistic ionospheric parameters in the altitude range z = 130 - 160 km at the four frequencies detectable by the Pioneer Venus Orbiter Electric Field Detector (OEFD): 100 Hz, 730 Hz, 5.4 kHz, and 30 kHz. The results are summarized as follows. The f = 100 Hz and 730 Hz waves can propagate as whistler waves, provided f < f(ce), where f(ce) is the electron cyclotron frequency, and provided that the ionospheric electron density is sufficiently small that the waves are not strongly attenuated by collisional effects (i.e., Pedersen conductivity). The attenuation length scale lambda0 associated with the Pedersen conductivity is lambda0 approximately 2(c/omega(pe))[OMEGA(e)3/omega(v(en) + v(ei))2]1/2; for parameters typical of the nightside Venus ionosphere above 140 km, electron-ion collisions are more frequent than electron-neutral collisions and are therefore responsible for the attenuation of the waves. A parameterization of the wave intensities and Poynting flux as a function of magnetic field and peak electron density is presented. The waves are found to propagate most easily for high magnetic field and low electron density conditions (i.e., ionospheric holes); this result is consistent with observational data. The incident Poynting flux at the bottom of the ionosphere (z congruent-to 130 km) is estimated to be S congruent-to 0.1 W/m2 for the 100 Hz waves. The f = 5.4 kHz and 30 kHz cannot propagate through the nightside Venus ionosphere, as expected, because f(pe) > f > f(ce). RP HUBA, JD (reprint author), USN,RES LAB,DIV PLASMA PHYS,SPACE PLASMA BRANCH,WASHINGTON,DC 20375, USA. NR 27 TC 11 Z9 11 U1 0 U2 0 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 MAR 25 PY 1993 VL 98 IS E3 BP 5291 EP 5300 DI 10.1029/93JE00119 PG 10 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KW894 UT WOS:A1993KW89400002 ER PT J AU YODER, MN AF YODER, MN TI GROUP-IV ATOMIC LAYER EPITAXY SO THIN SOLID FILMS LA English DT Article ID IONIZED CLUSTER BEAM; ELECTRON-MICROSCOPY; GROWTH-PROCESSES; MECHANISMS; SILICON; FILMS AB Group IV atomic layer epitaxy (ALE) provides special challenges in that the conventional alternation of anion and cation species is not applicable. New experimental approaches are proposed that synergistically combine to gain real-time, in situ information on the surface, its activation energy, reconstruction, and work function so as to choose optimally feedstock molecules. New computer codes in computational chemistry are expected to stimulate further a synergistic approach to group IV ALE. RP YODER, MN (reprint author), OFF NAVAL RES,DIV ELECTR,ARLINGTON,VA 22217, USA. NR 24 TC 8 Z9 8 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 MAR 25 PY 1993 VL 225 IS 1-2 BP 145 EP 149 DI 10.1016/0040-6090(93)90144-E PG 5 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA KV102 UT WOS:A1993KV10200029 ER PT J AU ROSTOKER, N WESSEL, F RAHMAN, H MAGLICH, BC SPIVEY, B FISHER, A AF ROSTOKER, N WESSEL, F RAHMAN, H MAGLICH, BC SPIVEY, B FISHER, A TI MAGNETIC FUSION WITH HIGH-ENERGY SELF-COLLIDING ION-BEAMS SO PHYSICAL REVIEW LETTERS LA English DT Article ID STABILITY; PLASMA AB Self-consistent equilibria are obtained for high beta plasma where almost all of the ions are ene with a gyroradius of the order of the plasma scale length. Magnetohydrodynamics would not apply to such a plasma. Recent experiments with tokamaks suggest that it would be insensitive to microinstabilities. Several methods are described for creating the plasma with intense neutralized ion beams. C1 UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92521. ADV PHYS CORP,IRVINE,CA 92715. THERMAL TECHNOL INC,SAN DIEGO,CA 92121. USN,RES LAB,WASHINGTON,DC 20375. RP ROSTOKER, N (reprint author), UNIV CALIF IRVINE,IRVINE,CA 92717, USA. NR 19 TC 28 Z9 28 U1 2 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 MAR 22 PY 1993 VL 70 IS 12 BP 1818 EP 1821 DI 10.1103/PhysRevLett.70.1818 PG 4 WC Physics, Multidisciplinary SC Physics GA KT367 UT WOS:A1993KT36700022 ER PT J AU JUNE, CH LINETTE, GP PIERCE, PF JIN, NR LUM, LG AF JUNE, CH LINETTE, GP PIERCE, PF JIN, NR LUM, LG TI POTENTIAL CLINICAL-APPLICATIONS OF SIGNAL TRANSDUCTION MEASUREMENTS IN MARROW TRANSPLANTATION AND HIV-1 INFECTION SO ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Article ID FLOW CYTOMETRIC MEASUREMENT; T-CELLS; IONIZED CALCIUM; RECEPTOR; LYMPHOCYTES; DYSFUNCTION; FLUO-3; DEFECT; VIRUS C1 UNIFORMED SERV UNIV HEALTH SCI,BETHESDA,MD 20899. GEORGETOWN UNIV,SCH MED,DEPT MED,WASHINGTON,DC 20057. WAYNE STATE UNIV,BONE MARROW TRANSPLANT PROGRAM,DETROIT,MI 48202. RP JUNE, CH (reprint author), USN,MED RES INST,IMMUNE CELL BIOL PROGRAM,BETHESDA,MD 20889, USA. NR 20 TC 6 Z9 6 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA 2 E 63RD ST, NEW YORK, NY 10021 SN 0077-8923 J9 ANN NY ACAD SCI JI Ann. N.Y. Acad. Sci. PD MAR 20 PY 1993 VL 677 BP 225 EP 232 DI 10.1111/j.1749-6632.1993.tb38780.x PG 8 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KX225 UT WOS:A1993KX22500024 PM 8494211 ER PT J AU RABINOVITCH, PS JUNE, CH KAVANAGH, TJ AF RABINOVITCH, PS JUNE, CH KAVANAGH, TJ TI INTRODUCTION TO FUNCTIONAL CELL ASSAYS SO ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Article ID RED BLOOD-CELLS; FLOW-CYTOMETRY; T-CELLS; GLUTATHIONE DEFICIENCY; CALCIUM RESPONSES; HUMAN-NEUTROPHILS; IONIZED CALCIUM; INDICATORS; LYMPHOCYTES; EXPRESSION C1 USN,MED RES INST,IMMUNE CELL BIOL PROGRAM,BETHESDA,MD 20814. UNIV WASHINGTON,DEPT MED,SEATTLE,WA 98195. UNIV WASHINGTON,DEPT ENVIRONM HLTH,SEATTLE,WA 98195. RP RABINOVITCH, PS (reprint author), UNIV WASHINGTON,DEPT PATHOL,SEATTLE,WA 98195, USA. NR 45 TC 7 Z9 7 U1 0 U2 0 PU NEW YORK ACAD SCIENCES PI NEW YORK PA 2 E 63RD ST, NEW YORK, NY 10021 SN 0077-8923 J9 ANN NY ACAD SCI JI Ann. N.Y. Acad. Sci. PD MAR 20 PY 1993 VL 677 BP 252 EP 264 DI 10.1111/j.1749-6632.1993.tb38782.x PG 13 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KX225 UT WOS:A1993KX22500026 PM 8494213 ER PT J AU QUIRRENBACH, A MOZURKEWICH, D ARMSTRONG, JT BUSCHER, DF HUMMEL, CA AF QUIRRENBACH, A MOZURKEWICH, D ARMSTRONG, JT BUSCHER, DF HUMMEL, CA TI ANGULAR DIAMETER MEASUREMENTS OF COOL GIANT STARS IN STRONG TIO BANDS AND IN THE CONTINUUM SO ASTROPHYSICAL JOURNAL LA English DT Article DE STARS, ATMOSPHERES; STARS, FUNDAMENTAL PARAMETERS; STARS, GIANTS; TECHNIQUES, INTERFEROMETRIC ID MICHELSON INTERFEROMETRY; R-LEONIS; MIRA AB We present angular diameter measurements of 15 giant and supergiant stars in the strong TiO absorption band at 712 nm and in a continuum band at 754 nm with the MkIII long-baseline interferometer. While relatively warm giant stars (spectral types K5 III or MO III) have identical diameters measured with the two filters, cooler stars (spectral types M3 III to M5 III) appear approximately 10% larger at 712 nm than at 754 nm. This effect is even more pronounced in luminosity class I stars. It can be understood by noting that the tenuous and extended stellar atmospheres of cool stars become opaque in TiO absorption bands at a significantly larger radius than in the continuum; i.e., we measure directly the physical extension of the stellar atmospheres. This is a novel method for testing models of cool star atmospheres. C1 USN, RES LAB, CTR ADV SPACE SENSING, WASHINGTON, DC 20375 USA. RP USN OBSERV, 34TH ST & MASS AVE NW, WASHINGTON, DC 20392 USA. NR 17 TC 48 Z9 48 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD MAR 20 PY 1993 VL 406 IS 1 BP 215 EP 219 DI 10.1086/172432 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KT453 UT WOS:A1993KT45300021 ER PT J AU ALM, RA GUERRY, P TRUST, TJ AF ALM, RA GUERRY, P TRUST, TJ TI SIGNIFICANCE OF DUPLICATED FLAGELLIN GENES IN CAMPYLOBACTER SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Note DE FLAGELLA; CHIMERIC FLAGELLIN; CAMPYLOBACTER; RECOMBINATION; MOTILITY ID SALMONELLA-TYPHIMURIUM; CAULOBACTER-CRESCENTUS; NEISSERIA-GONORRHOEAE; TERMINAL REGIONS; JEJUNI; FILAMENT; EXPRESSION; ENTERITIS; TRANSCRIPTION; CONVERSION C1 UNIV VICTORIA,DEPT BIOCHEM & MICROBIOL,VICTORIA V8W 3P6,BC,CANADA. USN,MED RES INST,ENTER DIS PROGRAM,BETHESDA,MD 20814. NR 29 TC 33 Z9 33 U1 0 U2 0 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 MAR 20 PY 1993 VL 230 IS 2 BP 359 EP 363 DI 10.1006/jmbi.1993.1151 PG 5 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KW260 UT WOS:A1993KW26000001 PM 8464049 ER PT J AU PAPADOPOULOS, K MILIKH, GM SPRANGLE, P AF PAPADOPOULOS, K MILIKH, GM SPRANGLE, P TI TRIGGERING THE HF BREAKDOWN OF THE ATMOSPHERE BY BARIUM RELEASE SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article AB RF ionization rates for mixtures of air with barium are computed using a Fokker-Planck code. It is shown that there is an optimum mixing ratio of barium to air, significantly lower than unity, which maximizes the ionization rate for a given value of incident RF power density and frequency. Rocket injection of barium at a selected height reduces significantly the RF breakdown threshold for the mixture, and allows atmospheric and ionospheric breakdown at the selected heights using the radiation from the powerful HF radio facilities. The possibility of field experiments using currently available or projected HF heaters is discussed. C1 UNIV MARYLAND,DEPT PHYS,COLL PK,MD 20742. USN,RES LAB,DIV PLASMA PHYS,WASHINGTON,DC 20375. RP PAPADOPOULOS, K (reprint author), UNIV MARYLAND,DEPT ASTRON,COLL PK,MD 20742, USA. NR 13 TC 0 Z9 0 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD MAR 19 PY 1993 VL 20 IS 6 BP 471 EP 474 DI 10.1029/93GL00489 PG 4 WC Geosciences, Multidisciplinary SC Geology GA KU908 UT WOS:A1993KU90800015 ER PT J AU THOMPSON, RB JONES, ER AF THOMPSON, RB JONES, ER TI ENZYME-BASED FIBER OPTIC ZINC BIOSENSOR SO ANALYTICAL CHEMISTRY LA English DT Article ID FLUORESCENCE SENSOR; SEAWATER; LIGANDS; PACIFIC; IRON AB A fluorescence-based fiber optic biosensor capable of detecting zinc(II) at nanomolar concentrations is described. The sensor transduces the specific recognition of the ion by an enzyme (carbonic anhydrase) as a change in the fluorescence of an inhibitor which binds to the zinc in the active site. The concentration of metal ion is proportional to the ratio of fluorescence intensity at two wavelengths, corresponding to the emission from bound and free inhibitor. Sensing of zinc may be performed through a single optical fiber. C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. RP THOMPSON, RB (reprint author), UNIV MARYLAND,SCH MED,DEPT BIOL CHEM,108 N GREENE ST,BALTIMORE,MD 21201, USA. NR 36 TC 103 Z9 104 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAR 15 PY 1993 VL 65 IS 6 BP 730 EP 734 DI 10.1021/ac00054a013 PG 5 WC Chemistry, Analytical SC Chemistry GA KR445 UT WOS:A1993KR44500014 ER PT J AU FLETCHER, CL FULCHER, SF TANNER, GA SUTPHIN, JE AF FLETCHER, CL FULCHER, SF TANNER, GA SUTPHIN, JE TI INCIDENCE OF DROPPED LENS FRAGMENTS AND VITREOUS LOSS IN A TRAINING-PROGRAM DURING TRANSITION TO PHACOEMULSIFICATION SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 USN HOSP,SAN DIEGO,CA 92134. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAR 15 PY 1993 VL 34 IS 4 BP 885 EP 885 PG 1 WC Ophthalmology SC Ophthalmology GA KT893 UT WOS:A1993KT89300916 ER PT J AU CHOPLIN, NT ULRICH, GG RIFFENBURGH, RH AF CHOPLIN, NT ULRICH, GG RIFFENBURGH, RH TI ANALYSIS OF OBSERVED DIFFERENCES IN INDIVIDUAL-RESPONSES TO METIPRANOLOL 0.3-PERCENT AND TIMOLOL 0.5-PERCENT IN LOWERING INTRAOCULAR-PRESSURE (IOP) IN OPEN ANGLE GLAUCOMA AND OCULAR HYPERTENSION SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 USN HOSP,SAN DIEGO,CA 92134. USN HOSP,CAMP LEJEUNE,NC. NR 1 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAR 15 PY 1993 VL 34 IS 4 BP 927 EP 927 PG 1 WC Ophthalmology SC Ophthalmology GA KT893 UT WOS:A1993KT89301123 ER PT J AU DERICK, RJ WALTERS, TR ROBIN, AL BARNEBEY, HS CHOPLIN, NT KELLEY, EP STOECKER, JF AF DERICK, RJ WALTERS, TR ROBIN, AL BARNEBEY, HS CHOPLIN, NT KELLEY, EP STOECKER, JF TI BRIMONIDINE TARTRATE - A ONE MONTH DOSE-RESPONSE STUDY SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 ALLERGAN PHARMACEUT INC,IRVINE,CA. OHIO STATE UNIV,COLUMBUS,OH 43210. WILMER EYE INST,BALTIMORE,MD. USN HOSP,SAN DIEGO,CA 92134. NR 0 TC 9 Z9 9 U1 0 U2 1 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAR 15 PY 1993 VL 34 IS 4 BP 929 EP 929 PG 1 WC Ophthalmology SC Ophthalmology GA KT893 UT WOS:A1993KT89301136 ER PT J AU DIVITA, JC ROCK, I AF DIVITA, JC ROCK, I TI A COPLANARITY PRINCIPLE OF MOTION PERCEPTION SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,BERKELEY,CA 94720. USN,SUBMARINE MED RES LAB,GROTON,CT 06340. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAR 15 PY 1993 VL 34 IS 4 BP 1053 EP 1053 PG 1 WC Ophthalmology SC Ophthalmology GA KT893 UT WOS:A1993KT89301722 ER PT J AU HILL, RA ESTEROWITZ, T RYAN, J YOSHIRO, H SHIRK, J KENNEY, M SHIMUZU, S LIAW, LH TROMBERG, BJ AF HILL, RA ESTEROWITZ, T RYAN, J YOSHIRO, H SHIRK, J KENNEY, M SHIMUZU, S LIAW, LH TROMBERG, BJ TI PHOTODYNAMIC THERAPY (PDT) OF THE CILIARY BODY WITH SILICONE NAPHTHALOCYANINE (SINC) IN RABBITS SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 UNIV CALIF IRVINE,DEPT OPHTHALMOL,IRVINE,CA 92717. UNIV CALIF IRVINE,MED CLIN,IRVINE,CA 92717. UNIV CALIF IRVINE,BECKMAN LASER INST,IRVINE,CA 92717. USN,RES LAB,WASHINGTON,DC 20375. CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106. NR 0 TC 2 Z9 2 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAR 15 PY 1993 VL 34 IS 4 BP 1069 EP 1069 PG 1 WC Ophthalmology SC Ophthalmology GA KT893 UT WOS:A1993KT89301794 ER PT J AU SUTPHIN, JE FULCHER, SF AF SUTPHIN, JE FULCHER, SF TI ACCURACY OF IMPLANT POWER PREDICTION IN SCLERAL-FIXATED POSTERIOR CHAMBER IOLS - RETROSPECTIVE COMPARISON WITH SULCUS PLACED LENSES SO INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE LA English DT Meeting Abstract C1 NAVAL HOSP,SAN DIEGO,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0146-0404 J9 INVEST OPHTH VIS SCI JI Invest. Ophthalmol. Vis. Sci. PD MAR 15 PY 1993 VL 34 IS 4 BP 1453 EP 1453 PG 1 WC Ophthalmology SC Ophthalmology GA KT893 UT WOS:A1993KT89303710 ER PT J AU KHAN, MA KUZNIA, JN OLSON, DT KAPLAN, R AF KHAN, MA KUZNIA, JN OLSON, DT KAPLAN, R TI DEPOSITION AND SURFACE CHARACTERIZATION OF HIGH-QUALITY SINGLE-CRYSTAL GAN LAYERS SO JOURNAL OF APPLIED PHYSICS LA English DT Note ID CHEMICAL VAPOR-DEPOSITION; STIMULATED-EMISSION; ROOM-TEMPERATURE; SAPPHIRE; GROWTH AB Recently, using low pressure metalorganic chemical vapor deposition we grew extremely high quality single crystal GaN films over basal plane sapphire substrates. Optimization of the buffer layers and the total film thickness played a key role in determining the electrical, optical, crystalline and surface qualities. In this communication we present the surface characterization results for these high quality GaN layers. Reflection high energy electron diffraction, low energy electron diffraction (LEED), and electron energy loss spectroscopy data are presented for clean GaN surfaces. The cleaning procedure was developed using Auger electron spectroscopy analysis. These electron diffraction data indicate the grown surface to be excellent single crystal GaN with a wurtzite structure. To the best of our knowledge ours is the first reported LEED data for single crystal GaN. C1 USN,RES LAB,WASHINGTON,DC 20375. RP KHAN, MA (reprint author), APA OPT INC,2950 NE 84TH LANE,BLAINE,MN 55434, USA. NR 16 TC 70 Z9 70 U1 0 U2 11 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 MAR 15 PY 1993 VL 73 IS 6 BP 3108 EP 3110 DI 10.1063/1.352999 PG 3 WC Physics, Applied SC Physics GA KT869 UT WOS:A1993KT86900079 ER PT J AU BOURKE, RH PAQUETTE, RG BLYTHE, RF STONE, MD AF BOURKE, RH PAQUETTE, RG BLYTHE, RF STONE, MD TI ON THE DEEP AND BOTTOM WATERS OF THE GREENLAND SEA FROM SUMMER 1989 AND 1990 DATA SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Article ID ARCTIC MEDITERRANEAN SEAS; OCEAN AB The deep waters of the central and southern Greenland Sea are examined using Bartlett 1989 and 1990 summer data displayed at very high temperature and sanity resolutions. The mixing of Arctic Ocean Deep Water (AODW) with Greenland Sea Deep Water (GSDW) in proportions of about 1:1 to form ''new'' Norwegian Sea Deep Water (NSDW) is confirmed. However, the previously accepted route of this new NSDW through the ridge system into the Norwegian Sea, the Jan Mayen Channel, is shown to pass deep water only intermittently; a passage through Mohn's Ridge farther north, beginning near 72-degrees-06'N, 2-degrees-W, is identified as a more likely route. Part of the ultimate AODW-GSDW mixture is shown to continue on along the Greenland continental slope into the Iceland Sea. A peculiar isothermal condition was found in the deeper parts of the GSDW. This is postulated to result from upward diffusion of temperature from a layer initially having the adiabatic temperature gradient. Above the isothermal layer is one of warming and decreasing salinity, the result of recent successive deep convections to different depths. RP BOURKE, RH (reprint author), NAVAL POST GRAD SCH,DEPT OCEANOG,MONTEREY,CA 93943, USA. NR 17 TC 6 Z9 6 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-OCEANS JI J. Geophys. Res.-Oceans PD MAR 15 PY 1993 VL 98 IS C3 BP 4629 EP 4638 DI 10.1029/92JC02752 PG 10 WC Oceanography SC Oceanography GA KR852 UT WOS:A1993KR85200001 ER PT J AU FARMER, LD EPPLER, DT LOHANICK, AW AF FARMER, LD EPPLER, DT LOHANICK, AW TI PASSIVE MICROWAVE SIGNATURES OF FRACTURES AND RIDGES IN SEA ICE AT 33.6 GHZ (VERTICAL POLARIZATION) AS OBSERVED IN AIRCRAFT IMAGES SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Article ID DEPTH-HOAR; SNOW; EMISSION; ALASKA AB An aircraft data set of coincident K(a) band (33.6 GHz, vertical polarization) passive microwave images and aerial photographs acquired in the Chukchi-Beaufort Sea region in March 1983 was analyzed to evaluate radiometric signatures of deformational features that occur in sea ice. A total of 115 fractures and 197 pressure ridges were examined with respect to physical appearance (relative age, snow cover, ice type, width, orientation) as observed in photographs, and radiometric character (brightness temperature, radiometric contrast with respect to adjacent ice, radiometric profile across the feature) as measured from digital passive microwave images. Of the deformational features that were observed in aerial photographs, 82% had radiometric signatures of sufficient contrast to be observed in passive microwave images. Fractures and ridges have equal chance of detection, but fractures cannot be distinguished from pressure ridges on the basis of brightness temperature, radiometric contrast, or characteristics of radiometric profiles measured across these features. However, visual analysis of passive microwave images, which takes into account contextual information, does allow fractures to be distinguished from pressure ridges in many instances. Radiometric signatures of both fractures and ridges are more likely to be radiometrically warmer (as opposed to cooler) than adjacent ice, which suggests that saline ice is a significant constituent of most deformational features. New ridges are more likely to be radiometrically warm than old ridges, probably because brine drains from the ridge as it ages (which reduces emissivity) and snow accumulates in drifts along the ridge trend (which enhances scattering). However, brightness temperatures of snow-covered ridges extend across a range that is approximately 15 K cooler, and 10 K warmer than the range observed for snow-free ridges. Old features show higher radiometric contrast with respect to adjacent ice than new features, which increases their probability of detection. C1 USN,RES LAB,POLAR OCEANOG BRANCH,HANOVER,NH. NR 36 TC 2 Z9 2 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-OCEANS JI J. Geophys. Res.-Oceans PD MAR 15 PY 1993 VL 98 IS C3 BP 4645 EP 4665 DI 10.1029/92JC02753 PG 21 WC Oceanography SC Oceanography GA KR852 UT WOS:A1993KR85200003 ER PT J AU LOHANICK, AW AF LOHANICK, AW TI MICROWAVE BRIGHTNESS TEMPERATURES OF LABORATORY-GROWN UNDEFORMED 1ST-YEAR ICE WITH AN EVOLVING SNOW COVER SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Article ID SEA ICE; DIELECTRIC-CONSTANT; FREQUENCIES; SCATTERING AB A laboratory experiment was performed to study a case in which a snow cover introduced on an established saline ice sheet resulted in physical processes that significantly affected the microwave brightness temperature over a period of a few weeks. Saline ice was grown to a thickness of 240 mm in an outdoor pool at ambient air temperatures. Precipitation was allowed by use of a movable roof. Brightness temperatures were measured at 10 and 85 GHz before and for several weeks after one snowfall. During the same period, the vertical temperature profile and crystallography of the snow column, as well as ice structure and salinity at the original ice surface, were monitored. The 10-GHz brightness temperature dropped by as much as 100 K from bare ice values during the first few days after the snow fell, because of a saline slush layer which formed at the bottom of the snow. The saline water in the slush layer apparently was forced up through the unbroken ice by the added snow load. The slush layer eventually froze into an added highly emissive frazil ice layer which raised the 10-GHz brightness temperature to above its bare ice values. The frazil ice layer was similar to superimposed frazil ice observed on freezing leads in high-latitude ice packs. The 85-GHz brightness temperature did not change from bare ice values soon after the snowfall but dropped by about 40 K over the following 20 days. We use a simple dielectric model to qualitatively test the dependence of 10-GHz brightness temperature on relevant physical conditions at the bottom of the snow. At 85 GHz the snow layer was optically thick, and the brightness temperature drop was probably the result of increased volume scatter from the growing snow grains. C1 USN,RES LAB,POLAR OCEANOG BRANCH OFF,HANOVER,NH. NR 24 TC 13 Z9 13 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-OCEANS JI J. Geophys. Res.-Oceans PD MAR 15 PY 1993 VL 98 IS C3 BP 4667 EP 4674 DI 10.1029/92JC02756 PG 8 WC Oceanography SC Oceanography GA KR852 UT WOS:A1993KR85200004 ER PT J AU VOON, LCLY RAMMOHAN, LR LUO, H FURDYNA, JK AF VOON, LCLY RAMMOHAN, LR LUO, H FURDYNA, JK TI BARRIER LOCALIZATION EFFECTS IN ALXGA1-XAS-ALYGA1-YAS SUPERLATTICES SO PHYSICAL REVIEW B LA English DT Article ID SHORT-PERIOD SUPERLATTICES; ELECTRONIC-STRUCTURE; OPTICAL-TRANSITIONS; QUANTUM-WELLS; STATES; BAND AB We demonstrate that the recently observed phenomenon of barrier localization in magnetic II-VI superlattices is also present in III-V superlattices. We investigate the role of subsidiary minima and show that above-barrier localization in both the GAMMA and X barriers occurs for type-I and type-II (001) superlattices in the AlxGa1-xAs-AlyGa1-yAs system. In addition, explicit evaluation of the oscillator strengths shows that the interband transitions involving the X-like conduction-band above-barrier states remain weak even though these are spatially direct. C1 WORCESTER POLYTECH INST,DEPT ELECT ENGN,WORCESTER,MA 01609. USN,RES LAB,WASHINGTON,DC 20375. UNIV NOTRE DAME,DEPT PHYS,NOTRE DAME,IN 46556. RP VOON, LCLY (reprint author), WORCESTER POLYTECH INST,DEPT PHYS,WORCESTER,MA 01609, USA. RI Ram-Mohan, Ramdas/C-5167-2012; Lew Yan Voon, Lok/I-8431-2012 OI Lew Yan Voon, Lok/0000-0001-5896-8119 NR 15 TC 13 Z9 13 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1993 VL 47 IS 11 BP 6585 EP 6589 PG 5 WC Physics, Condensed Matter SC Physics GA KT882 UT WOS:A1993KT88200046 ER PT J AU YANG, MJ WAGNER, RJ SHANABROOK, BV WATERMAN, JR MOORE, WJ AF YANG, MJ WAGNER, RJ SHANABROOK, BV WATERMAN, JR MOORE, WJ TI SPIN-RESOLVED CYCLOTRON-RESONANCE IN INAS QUANTUM-WELLS - A STUDY OF THE ENERGY-DEPENDENT G-FACTOR SO PHYSICAL REVIEW B LA English DT Note ID CONDUCTION-BAND; ELECTRON-GAS; GAAS; HETEROSTRUCTURES; HETEROJUNCTIONS; ANISOTROPY AB We report the observation of the spin-doublet splitting of cyclotron resonance (CR) in a two-dimensional electron gas (2DEG). Two discernible CR peaks, originating from spin-conserved transitions between adjacent sets of spin-split Landau states, are observed at a magnetic field as low as 4.4 T. The observed doublet features in the vicinity of even and odd integer filling factors are attributed to the linear dependence of the g factor and effective mass on the electron energy, respectively. In addition, our data show that the g factor of a 2DEG has a smaller energy dependence than that of bulk electrons. RP YANG, MJ (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 22 TC 69 Z9 69 U1 0 U2 9 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 MAR 15 PY 1993 VL 47 IS 11 BP 6807 EP 6810 DI 10.1103/PhysRevB.47.6807 PG 4 WC Physics, Condensed Matter SC Physics GA KT882 UT WOS:A1993KT88200086 ER PT J AU GREUS, C BUTOV, L DAIMINGER, F FORCHEL, A KNIPP, PA REINECKE, TL AF GREUS, C BUTOV, L DAIMINGER, F FORCHEL, A KNIPP, PA REINECKE, TL TI LATERAL QUANTIZATION IN THE OPTICAL-EMISSION OF BARRIER-MODULATED WIRES SO PHYSICAL REVIEW B LA English DT Note ID QUANTUM-WELL; CONFINEMENT AB The optical properties Of barrier-modulated In0.18Ga0.82As/GaAs quantum wires with widths down to 25 nm have been studied in photoluminescence spectroscopy. For wires with widths less than 50 nm the lowest-lying transition shows a systematic shift to higher energy corresponding to lateral quantization. Higher-lying laterally confined states have been observed in time-dependent photoluminescence experiments. Detailed calculations have been made of the electronic states of these systems, and the results are in agreement with experiment for the dependence of the transitions on wire width using the widths measured in scanning electron microscopy. C1 RUSSIAN ACAD SCI,INST SOLID STATE PHYS,CHERNOGOLOVKA 142432,RUSSIA. USN,RES LAB,WASHINGTON,DC 20375. RP GREUS, C (reprint author), UNIV WURZBURG,W-8700 WURZBURG,GERMANY. OI Forchel, Alfred/0000-0002-9377-9935 NR 11 TC 44 Z9 44 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1993 VL 47 IS 12 BP 7626 EP 7629 DI 10.1103/PhysRevB.47.7626 PG 4 WC Physics, Condensed Matter SC Physics GA KV976 UT WOS:A1993KV97600088 ER PT J AU EVERETT, RK AF EVERETT, RK TI ANALYSIS AND MODELING OF FIBER CLUSTERING IN COMPOSITES USING N-TUPLES SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article RP EVERETT, RK (reprint author), USN,RES LAB,COMPOSITES & CERAM BRANCH,CODE 6371,WASHINGTON,DC 20375, USA. OI Everett, Richard/0000-0002-6725-9442 NR 3 TC 3 Z9 3 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 MAR 15 PY 1993 VL 28 IS 6 BP 663 EP 668 DI 10.1016/0956-716X(93)90030-V PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KL548 UT WOS:A1993KL54800001 ER PT J AU MARKOWITZ, M BARAL, S BRANDOW, S SINGH, A AF MARKOWITZ, M BARAL, S BRANDOW, S SINGH, A TI PALLADIUM ION ASSISTED FORMATION AND METALLIZATION OF LIPID TUBULES SO THIN SOLID FILMS LA English DT Article ID MICROSTRUCTURES; CHEMISTRY AB Tubules have been formed at pH 5.6 from the negatively charged diacetylenic phospholipid 1,2-bis(tricosa-10,12-diynoyl)-sn-glycero-3-phosphohydroxyethanol in the presence of tetraammine palladium (II) chloride. Transmission electron microscopy revealed the formation of predominantly 0.07 mum-0.16 mum diameter tubules. Unbound palladium salt was removed by dialyzing tubule dispersion against water. The palladium bound to the lipid headgroups acted as a catalyst for the electroless metal plating of the tubules with nickel and cobalt metals. Sustained dialysis prior to metallization resulted in an increase in the diameter of the tubules. Palladium salt did not bind to the neutral phosphocholine headgroup of the analogous diacetylenic lipid and therefore no metallization was observed. Thin slices of metal coated tubules embedded in epoxy resin were characterized by atomic force and scanning tunneling microcopy. C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,CODE 6900,WASHINGTON,DC 20375. GEOCENTERS INC,FT WASHINGTON,MD 20744. UNIV FLORIDA,DEPT CHEM,GAINESVILLE,FL 32611. NR 21 TC 44 Z9 48 U1 1 U2 2 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 MAR 15 PY 1993 VL 224 IS 2 BP 242 EP 247 DI 10.1016/0040-6090(93)90440-Z PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA KR510 UT WOS:A1993KR51000019 ER PT J AU YUI, K ISHIDA, Y KATSUMATA, M KOMORI, S CHUSED, TM ABE, R AF YUI, K ISHIDA, Y KATSUMATA, M KOMORI, S CHUSED, TM ABE, R TI REVERSIBLE VS IRREVERSIBLE FORMS OF T-CELL UNRESPONSIVENESS TO MIS-1A ARE 2 SEPARATE MECHANISMS OF T-CELL CLONAL ANERGY SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 UNIV PENN,DEPT PATHOL & LAB MED,PHILADELPHIA,PA 19104. NIAID,IMMUNOL LAB,ROCKVILLE,MD 20852. USN,INST MED,IMMUNE CELL BIOL PROGRAM,BETHESDA,MD 20889. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD MAR 13 PY 1993 SU 17D BP 54 EP 54 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KV880 UT WOS:A1993KV88000174 ER PT J AU MCELVANY, SW ROSS, MM GOROFF, NS DIEDERICH, F AF MCELVANY, SW ROSS, MM GOROFF, NS DIEDERICH, F TI CYCLOCARBON COALESCENCE - MECHANISMS FOR TAILOR-MADE FULLERENE FORMATION SO SCIENCE LA English DT Article ID CARBON CLUSTER IONS; MASS-SPECTROMETRY; LASER ABLATION; BUCKMINSTERFULLERENE; HYDROCARBONS; C60 AB The availability of macroscopic qualities of fullerenes has resulted in a vast number of physical and chemical studies of these new materials. However, the mechanisms that lead to the formation of these spherical carbon allotropes are not well understood. Mass spectral evidence has been obtained for the size-selective growth of fullerenes through the coalescence of cyclo[n]carbons, molecular carbon allotropes consisting of monocyclic rings with n carbon atoms. Whereas coalescence of cyclo[30]carbon (cyclo-C30) produces predominantly buckminsterfullerene (C60), the smaller rings cyclo-C18, and cyclo-C24 preferentially produce fullerene C70 through distinct intermediates. The present studies not only provide new insights into fullerene formation mechanisms but also raise the possibility of tailoring the size distributions of fullerenes by variation of the appropriate properties of the precursors. C1 UNIV CALIF LOS ANGELES,DEPT CHEM & BIOCHEM,LOS ANGELES,CA 90024. SWISS FED INST TECHNOL,ORGAN CHEM LAB,CH-8092 ZURICH,SWITZERLAND. RP MCELVANY, SW (reprint author), USN,RES LAB,DIV CHEM,CODE 6113,WASHINGTON,DC 20375, USA. NR 26 TC 159 Z9 160 U1 2 U2 22 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 12 PY 1993 VL 259 IS 5101 BP 1594 EP 1596 DI 10.1126/science.259.5101.1594 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KR543 UT WOS:A1993KR54300033 PM 17733024 ER PT J AU ODENWALD, SF SCHWARTZ, PR AF ODENWALD, SF SCHWARTZ, PR TI AN IRAS SURVEY OF STAR-FORMING REGIONS TOWARD CYGNUS SO ASTROPHYSICAL JOURNAL LA English DT Article DE INFRARED, STARS; ISM, INDIVIDUAL (CYG X); RADIO LINES, STARS; STARS, FORMATION; STARS, PRE-MAIN-SEQUENCE ID CARBON-MONOXIDE EMISSION; YOUNG STELLAR OBJECTS; REVISED AFGL CATALOGS; X REGION; GALACTIC PLANE; MOLECULAR CLOUDS; SPIRAL STRUCTURE; PELICAN NEBULAE; NORTH-AMERICA; POINT SOURCES AB The distribution of young stellar objects toward the Cygnus X region obtained from the Infrared Astronomical Satellite (IRAS) is combined with a recent (CO)-C-12 (J = 2-1) survey. The most luminous young stellar objects (YSOs) are examined for membership in the Local arm and the Perseus arm. The far-infrared, radio, and molecular emission is also analyzed from a global perspective. Seventy YSOs have been identified, corresponding to stars earlier than almost-equal-to B7 ZAMS, primarily associated with molecular clouds in the Local arm. The (CO)-C-12 (J = 2-1) emission associated with these YSOs reveals 23 instances of broad-line wings including 10 with spatially complex, extended high-velocity molecular emission. We have identified a new Perseus arm star-forming region, IRAS 20144+3726, and have also identified 20264 + 4042 and 20321 + 4112 near the H II regions DR 7 and 18P61 as broad-wing outflow sources also located in the Perseus arm. We conclude that no more than three YSOs earlier than approximately BO ZAMS currently exist in the Perseus arm region located behind Cygnus X. Although we find no compelling evidence in the large-scale far-IR emission confirming the existence of the so-called Cygnus Superbubble, the Cygnus OB 2 association, is found to coincide with a localized cavity in which some dust depletion has occurred. C1 NRL,CTR ADV SPACE SENSING,WASHINGTON,DC 20375. RP ODENWALD, SF (reprint author), APPL RES CORP,8201 CORP DR,SUITE 1120,LANDOVER,MD 20785, USA. NR 70 TC 55 Z9 55 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 MAR 10 PY 1993 VL 405 IS 2 BP 706 EP 719 DI 10.1086/172398 PN 1 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KP612 UT WOS:A1993KP61200027 ER PT J AU KEENAN, FP DUFTON, PL CONLON, ES FOSTER, VJ KINGSTON, AE WIDING, KG AF KEENAN, FP DUFTON, PL CONLON, ES FOSTER, VJ KINGSTON, AE WIDING, KG TI IDENTIFICATION OF THE FE-XV 3S3P 1P-3P2 1S LINE IN SOLAR-FLARE SPECTRA AND ITS USE AS AN ELECTRON-DENSITY DIAGNOSTIC SO ASTROPHYSICAL JOURNAL LA English DT Article DE ATOMIC PROCESSES; SUN, FLARES; SUN, UV RADIATION ID SKYLAB XUV OBSERVATIONS; COMPACT FLARE; IMPACT EXCITATION; THERMAL STRUCTURE; MASS MOTIONS; IONS; TRANSITIONS; RATIOS; IRON; SUN AB We have examined EUV spectra of solar flares obtained with the Naval Research Laboratory's S082A slitless spectrograph on board Skylab, and measured the intensities of the 324.97 angstrom and 323.57 angstrom emission lines relative to that of the Fe XV 3s3p P-3(2)-3p2 P-3(1) transition at 321.76 angstrom. A comparison of these line ratios with theoretical predictions indicates that the Fe XV 3s3p P-1-3p2 S-1 transition is the line observed at 324.97 angstrom, rather than the feature at 323.57 angstrom as previously suggested. In addition, we show that the I(324.97 angstrom)/ I(321.76 angstrom) intensity ratio is an excellent electron density diagnostic for the Fe xv emitting region of the solar atmosphere. The relative intensities of other Fe XV lines in the approximately 290-330 angstrom wavelength region of the S082A spectra are also analyzed and briefly discussed. C1 QUEENS UNIV BELFAST,DEPT APPL MATH & THEORET PHYS,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND. USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. RP KEENAN, FP (reprint author), QUEENS UNIV BELFAST,DEPT PURE & APPL PHYS,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND. NR 22 TC 8 Z9 8 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 MAR 10 PY 1993 VL 405 IS 2 BP 798 EP 800 DI 10.1086/172409 PN 1 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KP612 UT WOS:A1993KP61200038 ER PT J AU NYSTUEN, JA LILLY, JE GOROCH, AK AF NYSTUEN, JA LILLY, JE GOROCH, AK TI A COMPARISON OF WIND-SPEED MEASURED BY THE SPECIAL SENSOR MICROWAVE IMAGER (SSM/I) AND THE GEOSAT ALTIMETER SO INTERNATIONAL JOURNAL OF REMOTE SENSING LA English DT Article AB Wind speed data have been routinely acquired at the Fleet Numerical Oceanography Center (FNOC) in near-real time from the Special Sensor Microwave/Imager (SSM/I), on board the Defense Meteorological Satellite Program (DMSP) satellite, and the radar altimeter on board the Geosat satellite. Both of these instruments use empirical algorithms which have been independently verified to measure wind speed in oceanic regions with an accuracy of +/-2m s-1. A comparison is made of the SSM/I and altimeter wind speed measurement from four regions with different environmental conditions present. Areas of variable atmospheric water vapour content do not appear to reduce the high correlation between the SSM/I and altimeter measured wind speeds, suggesting that in the formulation of the regression algorithms adequate sensitivity to and variation of water vapour concentration allowed the algorithm to compensate for this environmental factor. Whereas areas with liquid cloud water or rain present showed SSM/I wind speed estimates higher than the Geosat wind speed estimates, indicating further refinement of algorithms is required. C1 USN,OCEANOG & ATMOSPHER RES LAB,MONTEREY,CA 93943. RP NYSTUEN, JA (reprint author), USN,POSTGRAD SCH,DEPT OCEANOG,MONTEREY,CA 93943, USA. NR 13 TC 2 Z9 2 U1 0 U2 1 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0143-1161 J9 INT J REMOTE SENS JI Int. J. Remote Sens. PD MAR 10 PY 1993 VL 14 IS 4 BP 745 EP 756 PG 12 WC Remote Sensing; Imaging Science & Photographic Technology SC Remote Sensing; Imaging Science & Photographic Technology GA LB283 UT WOS:A1993LB28300010 ER PT J AU HONEYCHUCK, RV COZZENS, RF SHIRK, JS LINDLE, JR AF HONEYCHUCK, RV COZZENS, RF SHIRK, JS LINDLE, JR TI THIN-FILMS FROM 96-PERCENT QUINOLINE SO JOURNAL OF APPLIED POLYMER SCIENCE LA English DT Article AB Films from 96% quinoline and from 96% quinoline with poly(1,4-cyclohexylene carbonate), mesoporphyrin IX dimethyl ester, and Pd (II) mesoporphyrin IX dimethyl ester have been cast via heating and subsequent evaporation. The films are approximately 3 mum thick, with a maximum variation normal to the surface of 0.10 mum in 2 mm of surface travel. The optical quality of the samples formed from 96% quinoline alone is excellent and variable from the 96% quinoline/solute combinations. The third-order nonlinear optical (NLO) properties of these materials have been examined. C1 USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375. GEORGE MASON UNIV,FAIRFAX,VA 22030. RP HONEYCHUCK, RV (reprint author), USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375, USA. RI Lindle, James/A-9426-2009 NR 8 TC 0 Z9 0 U1 0 U2 3 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0021-8995 J9 J APPL POLYM SCI JI J. Appl. Polym. Sci. PD MAR 10 PY 1993 VL 47 IS 10 BP 1797 EP 1800 DI 10.1002/app.1993.070471010 PG 4 WC Polymer Science SC Polymer Science GA KL826 UT WOS:A1993KL82600010 ER PT J AU MILES, MH HOLLINS, RA BUSH, BF LAGOWSKI, JJ MILES, RE AF MILES, MH HOLLINS, RA BUSH, BF LAGOWSKI, JJ MILES, RE TI CORRELATION OF EXCESS POWER AND HELIUM PRODUCTION DURING D2O AND H2O ELECTROLYSIS USING PALLADIUM CATHODES SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY LA English DT Article ID COLD FUSION; ENERGY-BALANCE; HEAVY-WATER; ATOMIC LATTICE; NUCLEAR-FUSION; DEUTERIUM; CALORIMETRY; NEUTRON; TRITIUM; SYSTEM AB A critical issue in determining whether or not the anomalous effects that occur during D2O electrolysis are of nuclear origin is the measurement of nuclear products in amounts sufficient to explain the rate of excess enthalpy generation. Calorimetric evidence of excess power up to 27% was measured during the electrolysis of heavy water using palladium cathodes. Maximum excess power was 0.52 W (1.5 W/cm3) at 250 mA/cm2. Eight electrolysis gas samples collected during episodes of excess power production in two identical cells and analysed by mass spectrometry showed the presence of He-4. Furthermore, the amount of helium detected correlated qualitatively with the amount of excess power and was within an order of magnitude of the theoretical estimate of helium production based upon fusion of deuterium to form 4He. Any production of 3He or neutrons in these experiments was below our detection limits. However, the exposure of dental X-ray films placed outside the cells suggests the emission of radiation. Control experiments performed in exactly the same way but using H2O + LiOH in place of D2O + LiOD gave no evidence of helium, excess power or radiation. C1 UNIV TEXAS,DEPT CHEM,AUSTIN,TX 78712. EG&G ROCKY FLATS INC,DEPT NUCL SAFETY,GOLDEN,CO 80402. RP MILES, MH (reprint author), USN,DIV AIR WARFARE CTR WEAPONS,RES DEPT,DIV CHEM,CHINA LAKE,CA 93555, USA. NR 47 TC 40 Z9 40 U1 0 U2 5 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0022-0728 J9 J ELECTROANAL CHEM JI J. Electroanal. Chem. PD MAR 10 PY 1993 VL 346 IS 1-2 BP 99 EP 117 DI 10.1016/0022-0728(93)85006-3 PG 19 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA KQ710 UT WOS:A1993KQ71000006 ER PT J AU IDZERDA, Y PRINZ, GA AF IDZERDA, Y PRINZ, GA TI AUGER INTENSITY MAPPING OF MONOLAYERS OF NI/CU(001) SO SURFACE SCIENCE LA English DT Letter ID X-RAY-PHOTOELECTRON; ELECTRON DIFFRACTION; MULTIPLE-SCATTERING; HOLOGRAPHIC IMAGES; EPITAXIAL-FILMS; ENERGY AUGER; SURFACE; INTERFACE; SPECTROSCOPY; CRYSTALS AB Complete angle-resolved Ni LMM Auger electron diffraction patterns have been obtained for 1-3 monolayer coverages of Ni deposited on Cu(001). The Ni grows in a layer-by-layer manner up to 6 ML, but is tetragonally distorted from the fcc Cu structure. RP IDZERDA, Y (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 28 TC 17 Z9 17 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 MAR 10 PY 1993 VL 284 IS 1-2 BP L394 EP L398 PG 5 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA KR618 UT WOS:A1993KR61800004 ER PT J AU VOHRA, ST BUCHOLTZ, F AF VOHRA, ST BUCHOLTZ, F TI DYNAMIC CHARACTERISTICS OF A SUBCRITICAL BIFURCATION WITH INVERSION SYMMETRY SO PHYSICAL REVIEW LETTERS LA English DT Article ID STOCHASTIC RESONANCE; LORENZ MODEL; LASER; CHAOS AB Phase and amplitude dynamics of a subcritical period-doubling bifurcation are experimentally characterized in the nonlinear strain response (at f almost-equal-to 10 kHz) of a magnetostrictive oscillator. Low frequency (f(mod) less-than-or-equal-to 0.1 Hz) modulation of the observed subcritical bifurcation provides a phase-reversing time series whose power spectrum tends to conceal frequency components. An event counting technique developed for characterizing the phase-slip dynamics of the time series reveals a substantial component at half the modulation frequency (f/2) as well as at f. The event counting technique is applied to observe stochastic resonance for the first time in a tristable system. RP VOHRA, ST (reprint author), USN,RES LAB,CODE 5670,WASHINGTON,DC 20375, USA. NR 23 TC 5 Z9 5 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 MAR 8 PY 1993 VL 70 IS 10 BP 1425 EP 1428 DI 10.1103/PhysRevLett.70.1425 PG 4 WC Physics, Multidisciplinary SC Physics GA KQ414 UT WOS:A1993KQ41400018 ER PT J AU GULLAHORN, GM BOHMAN, HR WALLACE, MR AF GULLAHORN, GM BOHMAN, HR WALLACE, MR TI ANESTHESIA EMERGENCE DELIRIUM AFTER MEFLOQUINE PROPHYLAXIS SO LANCET LA English DT Letter RP GULLAHORN, GM (reprint author), USN HOSP,DEPT ANESTHESIOL,SAN DIEGO,CA 92134, USA. NR 2 TC 10 Z9 10 U1 1 U2 3 PU LANCET LTD PI LONDON PA 42 BEDFORD SQUARE, LONDON, ENGLAND WC1B 3SL SN 0140-6736 J9 LANCET JI Lancet PD MAR 6 PY 1993 VL 341 IS 8845 BP 632 EP 632 DI 10.1016/0140-6736(93)90392-T PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA KQ234 UT WOS:A1993KQ23400037 PM 8094856 ER PT J AU RUSSELL, TP MILLER, PJ PIERMARINI, GJ BLOCK, S AF RUSSELL, TP MILLER, PJ PIERMARINI, GJ BLOCK, S TI PRESSURE TEMPERATURE PHASE-DIAGRAM OF HEXANITROHEXAAZAISOWURTZITANE SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID THERMAL-DECOMPOSITION KINETICS; CHEMICAL-REACTIVITY; CELL AB The five known polymorphs of hexanitrohexaazaisowurtzitane (chemical name: 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazatetracyclo[5.5.0.0(5,9).0(3,11)]dodecane), alpha,beta, gamma, epsilon, and zeta, were studied by optical polarizing light microscopy (OPLM) and Fourier transform infrared spectroscopy (FTIR) as a function of temperature and pressure. A high-temperature/high-pressure diamond anvil cell specially designed for these studies was employed. Four reversible and five unidirectional phase transformations were observed and identified by FTIR spectra. Phase boundaries were studied as a function of pressure and temperature permitting a delineation of the various polymorph stability fields. A pressure/temperature reaction/phase diagram for the gamma polymorph to 14.0 GPa and temperatures between -125 and 340-degrees-C (or to thermal decomposition temperatures), is presented. FTIR spectra for all five polymorphs were obtained as a function of temperature and pressure. An a phase with trapped CO2/CO was observed by FTIR. The thermal decomposition temperature/pressure parameters were also determined. C1 NBS,MAT SCI & ENGN LAB,GAITHERSBURG,MD 20899. RP RUSSELL, TP (reprint author), USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20901, USA. NR 15 TC 70 Z9 73 U1 2 U2 11 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 MAR 4 PY 1993 VL 97 IS 9 BP 1993 EP 1997 DI 10.1021/j100111a043 PG 5 WC Chemistry, Physical SC Chemistry GA KQ339 UT WOS:A1993KQ33900043 ER PT J AU ADAMS, J RETTIG, W DURAN, RS NACIRI, J SHASHIDHAR, R AF ADAMS, J RETTIG, W DURAN, RS NACIRI, J SHASHIDHAR, R TI LANGMUIR FILMS OF LIQUID-CRYSTALLINE MATERIALS - THE INFLUENCE OF MOLECULAR ARCHITECTURE ON MORPHOLOGY AND PROPERTIES SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID AIR-WATER-INTERFACE; BLODGETT-FILMS; PHASE-TRANSITIONS; ORIENTATIONAL ORDER; MONOLAYERS; MICROSCOPE; POLYMER AB The differences in the Langmuir film properties of a liquid crystalline homopolymer, its corresponding mesogenic side group moiety, and two copolymers are discussed. The results from Brewster angle microscopy are compared with those from the standard methods that are commonly used to infer the structure of a monolayer (i.e., isotherms). As expected, the viscosity and stability of the films increased for the homopolymer while the onset mean molecular area (MmA) remained similar to that of the monomer. Although this similarity may lead to the assumption that the structure of the two films is the same, Brewster angle microscopy showed a distinct difference between both compounds. Whereas the monomer exhibits liquid crystalline condensed phases with large domains in which the molecular tilt is uniform, the homopolymer is in a solid amorphous state without any uniformly tilted regions large enough to be observed by the microscope. In contrast to the homopolymer, the copolymer is highly fluid with a distinctly higher MmA. Again, no domains with a uniform tilt were observed, probably due to the increased distance between the mesogens. C1 UNIV FLORIDA,DEPT CHEM,CTR MACROMOLEC SCI & ENGN,GAINESVILLE,FL 32611. USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 36 TC 31 Z9 32 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 MAR 4 PY 1993 VL 97 IS 9 BP 2021 EP 2026 DI 10.1021/j100111a048 PG 6 WC Chemistry, Physical SC Chemistry GA KQ339 UT WOS:A1993KQ33900048 ER PT J AU SHLESINGER, M AF SHLESINGER, M TI APPLIED CHAOS THEORY - A PARADIGM FOR COMPLEXITY - CAMBEL,AB SO NATURE LA English DT Book Review RP SHLESINGER, M (reprint author), OFF NAVAL RES,800 N QUINCY ST,ARLINGTON,VA 22217, USA. NR 1 TC 0 Z9 0 U1 0 U2 2 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD MAR 4 PY 1993 VL 362 IS 6415 BP 29 EP 30 DI 10.1038/362029b0 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KP976 UT WOS:A1993KP97600046 ER PT J AU DUTTA I SIMS, JD SEIGENTHALER, DM AF DUTTA, I SIMS, JD SEIGENTHALER, DM TI AN ANALYTICAL STUDY OF RESIDUAL-STRESS EFFECTS ON UNIAXIAL DEFORMATION OF WHISKER REINFORCED METAL-MATRIX COMPOSITES SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID UNIFORM TEMPERATURE-CHANGE; DISLOCATIONS PUNCHED-OUT; FINITE-ELEMENT ANALYSIS; AL-SIC COMPOSITES; SHORT-FIBER; EUTECTIC COMPOSITES; ALUMINUM COMPOSITES; CERAMIC COMPOSITES; PLASTIC RELAXATION; TENSILE PROPERTIES AB Finite element modeling was utilized to simulate the stress strain response of discontinuous SiC whisker reinforced aluminum-matrix composites, accounting for the thermal residual stresses (TRS) generated during solution treatment. The contributions of various micro-mechanisms to overall composite strengthening and deformation, and the impact of TRS on each mechanism were explicitly evaluated. It was inferred that constrained matrix plastic flow and matrix-to-fiber load transfer are the predominant sources of strengthening, with enhanced matrix dislocation density playing a secondary role. Residual stresses were found to significantly affect each of the operative strengthening mechanisms and hence the composite properties. Comparison with experiments revealed that the trends predicted by the model are generally consistent with actual composite behavior, although the model overpredicts work hardening rate. A parametric study of the effects of whisker volume fraction, aspect ratio and spacing on tensile and compressive deformation was also conducted. The results showed that increasing volume fraction, close end-to-end spacing and large aspect ratios result in greater strength and stiffness. RP DUTTA I (reprint author), USN, POSTGRAD SCH, DEPT MECH ENGN, MONTEREY, CA 93943 USA. NR 44 TC 53 Z9 56 U1 0 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-7151 J9 ACTA METALL MATER JI Acta Metall. Mater. PD MAR PY 1993 VL 41 IS 3 BP 885 EP 908 DI 10.1016/0956-7151(93)90023-L PG 24 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KN933 UT WOS:A1993KN93300023 ER PT J AU KIM, NJ LEE, EW AF KIM, NJ LEE, EW TI EFFECT OF T1 PRECIPITATE ON THE ANISOTROPY OF AL-LI ALLOY-2090 SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID ALLOYS AB A study has been made of the effect of T1 precipitate on the anisotropy of an Al-Li alloy 2090. The critical role of T, precipitates has been identified by comparing the behavior of the alloy with various microstructures. These include (1) T8E41 tempered specimen with T1, theta' and delta', (2) reverted specimen with T1, (3) re-solutionized specimen with very fine delta', and (4) under-aged specimen with fine delta' and theta'. It has been shown that the {110} [112] crystallographic texture developed during thermomechanical treatment has a direct effect on the anisotropy. It also has an indirect effect by causing an inhomogeneous distribution of nucleation sites for T1 among four {111} habit planes during stretching and accordingly inhomogeneous distribution of T1 precipitates among four possible {111} planes during aging. Such inhomogeneously distributed T1 precipitates in both T8E41 tempered and reverted specimens affect the variation of tensile properties, particularly elongation with specimen orientation. C1 POSTECH, DEPT MAT SCI & ENGN, POHANG 790600, SOUTH KOREA. USN, CTR AIR DEV, WARMINSTER, PA 18974 USA. RP KIM, NJ (reprint author), POSTECH, CTR ADV AEROSP MAT, POHANG 790600, SOUTH KOREA. NR 16 TC 38 Z9 42 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-7151 J9 ACTA METALL MATER JI Acta Metall. Mater. PD MAR PY 1993 VL 41 IS 3 BP 941 EP 948 DI 10.1016/0956-7151(93)90028-Q PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KN933 UT WOS:A1993KN93300028 ER PT J AU PAUL, AK AF PAUL, AK TI GENERATION OF ELECTRON-DENSITY MODELS WITH CONTINUOUS GRADIENTS FROM DISCRETE-DATA SO ADVANCES IN SPACE RESEARCH LA English DT Article ID F-REGION C1 USN,CTR OCEAN SYST,DIV OCEAN & ATMOSPHER SCI,SAN DIEGO,CA 92152. NR 5 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0273-1177 J9 ADV SPACE RES JI Adv. Space Res. PD MAR PY 1993 VL 13 IS 3 BP 33 EP 38 DI 10.1016/0273-1177(93)90244-6 PG 6 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA JY022 UT WOS:A1993JY02200005 ER PT J AU ROSENFELD, P EDWARDS, JE THOMAS, MD AF ROSENFELD, P EDWARDS, JE THOMAS, MD TI IMPROVING ORGANIZATIONAL SURVEYS - AN INTRODUCTION SO AMERICAN BEHAVIORAL SCIENTIST LA English DT Editorial Material C1 CALIF SCH PROFESS PSYCHOL,SAN DIEGO,CA. USN,CTR PERSONNEL RES & DEV,SAN DIEGO,CA 92132. SAN DIEGO STATE UNIV,SAN DIEGO,CA 92182. CALIF STATE UNIV SAN MARCOS,SAN MARCOS,CA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU SAGE PUBLICATIONS INC PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 SN 0002-7642 J9 AM BEHAV SCI JI Am. Behav. Sci. PD MAR-APR PY 1993 VL 36 IS 4 BP 414 EP 418 DI 10.1177/0002764293036004002 PG 5 WC Psychology, Clinical; Social Sciences, Interdisciplinary SC Psychology; Social Sciences - Other Topics GA KP041 UT WOS:A1993KP04100001 ER PT J AU EDWARDS, JE THOMAS, MD AF EDWARDS, JE THOMAS, MD TI THE ORGANIZATIONAL SURVEY PROCESS - GENERAL STEPS AND PRACTICAL CONSIDERATIONS SO AMERICAN BEHAVIORAL SCIENTIST LA English DT Article C1 CALIF STATE UNIV SAN MARCOS,SAN MARCOS,CA. CALIF SCH PROFESS PSYCHOL,SAN DIEGO,CA. SAN DIEGO STATE UNIV,SAN DIEGO,CA 92182. RP EDWARDS, JE (reprint author), USN,CTR PERSONNEL RES & DEV,SAN DIEGO,CA 92132, USA. NR 25 TC 0 Z9 0 U1 0 U2 0 PU SAGE PUBLICATIONS INC PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 SN 0002-7642 J9 AM BEHAV SCI JI Am. Behav. Sci. PD MAR-APR PY 1993 VL 36 IS 4 BP 419 EP 442 DI 10.1177/0002764293036004003 PG 24 WC Psychology, Clinical; Social Sciences, Interdisciplinary SC Psychology; Social Sciences - Other Topics GA KP041 UT WOS:A1993KP04100002 ER PT J AU ROSENFELD, P BOOTHKEWLEY, S EDWARDS, JE AF ROSENFELD, P BOOTHKEWLEY, S EDWARDS, JE TI COMPUTER-ADMINISTERED SURVEYS IN ORGANIZATIONAL SETTINGS - ALTERNATIVES, ADVANTAGES, AND APPLICATIONS SO AMERICAN BEHAVIORAL SCIENTIST LA English DT Article ID SEPARATE ANSWER SHEETS; RELIABILITY; INTERVIEW; ALCOHOL; MMPI; INFORMATION; COLLECTION; TELEPHONE; INVENTORY; QUESTIONS C1 CALIF SCH PROFESS PSYCHOL,SAN DIEGO,CA. SAN DIEGO STATE UNIV,SAN DIEGO,CA 92182. CALIF STATE UNIV SAN MARCOS,SAN MARCOS,CA. USN,CTR PERSONNEL RES & DEV,SAN DIEGO,CA 92132. NR 73 TC 25 Z9 26 U1 5 U2 5 PU SAGE PUBLICATIONS INC PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 SN 0002-7642 J9 AM BEHAV SCI JI Am. Behav. Sci. PD MAR-APR PY 1993 VL 36 IS 4 BP 485 EP 511 DI 10.1177/0002764293036004006 PG 27 WC Psychology, Clinical; Social Sciences, Interdisciplinary SC Psychology; Social Sciences - Other Topics GA KP041 UT WOS:A1993KP04100005 ER PT J AU BAXTER, SY DECK, DH AF BAXTER, SY DECK, DH TI TATTOO-ACQUIRED VERRUCA PLANA SO AMERICAN FAMILY PHYSICIAN LA English DT Letter RP BAXTER, SY (reprint author), USN,HOSP BREMERTON,BREMERTON,WA, USA. NR 0 TC 18 Z9 18 U1 0 U2 1 PU AMER ACAD FAMILY PHYSICIANS PI KANSAS CITY PA 8880 WARD PARKWAY, KANSAS CITY, MO 64114-2797 SN 0002-838X J9 AM FAM PHYSICIAN JI Am. Fam. Physician PD MAR PY 1993 VL 47 IS 4 BP 732 EP 732 PG 1 WC Primary Health Care; Medicine, General & Internal SC General & Internal Medicine GA KQ556 UT WOS:A1993KQ55600006 PM 8438675 ER PT J AU PETERSON, BL AF PETERSON, BL TI EXTERNAL BEVELING OF AN ENTRANCE GUNSHOT WOUND TO THE SKULL SO AMERICAN JOURNAL OF FORENSIC MEDICINE AND PATHOLOGY LA English DT Letter RP PETERSON, BL (reprint author), USN HOSP,SAN DIEGO,CA 92134, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0195-7910 J9 AM J FOREN MED PATH JI Am. J. Forensic Med. Pathol. PD MAR PY 1993 VL 14 IS 1 BP 88 EP 89 DI 10.1097/00000433-199303000-00027 PG 2 WC Medicine, Legal; Pathology SC Legal Medicine; Pathology GA KN187 UT WOS:A1993KN18700027 PM 8493980 ER PT J AU KRELL, KV COUREY, JM BISHARA, SE AF KRELL, KV COUREY, JM BISHARA, SE TI ORTHODONTIC BRACKET REMOVAL USING CONVENTIONAL AND ULTRASONIC DEBONDING TECHNIQUES, ENAMEL LOSS, AND TIME REQUIREMENTS SO AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS LA English DT Article AB The purpose of this study was to examine the effects of ultrasonic orthodontic bracket removal and cleanup and compare them with conventional debonding and cleaning of the enamel surfaces with burs and polishing disks. The amount of enamel loss and time for bracket removal and clean-up were also addressed. Thirty extracted human premolars were collected. The teeth were randomly placed in one of the three debonding groups: debonding with orthodontic pliers and enamel clean-up with finishing burs and polishing disks (group 1), debonding with orthodontic pliers and ultrasonic clean-up of the enamel surface (group 2), and ultrasonic debonding enamel clean-up (group 3). The teeth were stored for 48 hours in 100% humidity before bracket removal. All brackets were then removed. Polyvinyl siloxane impressions were made before and after bracket removal. Direct measurements of the teeth in micrometers were made at all steps. An additional 30 teeth were similarly prepared, and the brackets were debonded and cleaned-up as in the three groups previously described. The total time for bracket removal and enamel clean-up for each group was recorded in seconds. The results of this study indicated that (1) enamel loss as a result of orthodontic bracket removal is minimized by first removing the bracket with the debonding pliers, followed by ultrasonic removal of the residual composite (group 2); (2) the tooth surface was not significantly affected when either the combined debonding pliers and cleaning and ultrasonic clean-up technique (group 2) or the ultrasonic debonding using a technique (group 3) were used; and (3) using the debonding pliers followed with the ultrasonic removal of the residual composite (group 2) required significantly less time than the other two techniques. C1 UNIV IOWA,COLL DENT,DEPT ORTHODONT,IOWA CITY,IA 52242. USN HOSP,OAKLAND,CA. FU NIDCR NIH HHS [T35-DEO7159] NR 21 TC 47 Z9 53 U1 0 U2 2 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0889-5406 J9 AM J ORTHOD DENTOFAC JI Am. J. Orthod. Dentofac. Orthop. PD MAR PY 1993 VL 103 IS 3 BP 258 EP 266 DI 10.1016/0889-5406(93)70007-B PG 9 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA KT620 UT WOS:A1993KT62000014 PM 8456784 ER PT J AU CULHAM, P AF CULHAM, P TI WAR, WOMEN AND CHILDREN IN ANCIENT-ROME - EVANS,JK SO AMERICAN JOURNAL OF PHILOLOGY LA English DT Book Review RP CULHAM, P (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU JOHNS HOPKINS UNIV PRESS PI BALTIMORE PA JOURNALS PUBLISHING DIVISION, 2715 NORTH CHARLES ST, BALTIMORE, MD 21218-4319 SN 0002-9475 J9 AM J PHILOLOGY JI Am. J. Philol. PD SPR PY 1993 VL 114 IS 1 BP 171 EP 174 DI 10.2307/295393 PG 4 WC Classics SC Classics GA KV736 UT WOS:A1993KV73600016 ER PT J AU TARTAR, VM TRAMBERT, MA BALSARA, ZN MATTREY, RF AF TARTAR, VM TRAMBERT, MA BALSARA, ZN MATTREY, RF TI TUBULAR ECTASIA OF THE TESTICLE - SONOGRAPHIC AND MR IMAGING APPEARANCE SO AMERICAN JOURNAL OF ROENTGENOLOGY LA English DT Article ID RETE TESTIS; SIMPLE CYST; DIFFERENTIATION AB OBJECTIVE. Ectasia of the seminiferous tubules at the level of the mediastinum is a recently recognized benign condition of the testicles. Although it may have typical sonographic features, the condition can at times be difficult to distinguish from tumors on the basis of sonography. We describe the sonographic and MR appearance of this condition in seven men in whom we were able to distinguish tubular ectasia from tumors of the testicles on the basis of the imaging findings. MATERIALS AND METHODS. Ectasia of the seminiferous tubules was histologically proved in a man who had an intratesticular mass seen on sonograms and MR images. We analyzed the sonographic and MR imaging features in this man and in six others who had similar imaging findings but did not have biopsy proof of tubular ectasia. RESULTS. The first patient was a man with bilateral findings who had a unilateral orchiectomy that revealed ectasia of the seminiferous tubules. Spermatocelectomy was performed in another man whose testis was normal on surgical inspection and on subsequent follow-up. Imaging findings have remained unchanged in one man with 3-year imaging follow-up and in three men with clinical follow-up of 8-22 months. One patient was lost to follow-up. At presentation, most of the men were more than 55 years old. All had a scrotal mass typical of a spermatocele on physical examination, with normal testes when the testes could be palpated. The spermatocele was larger than 4 cm in six of 11 involved epididymides. On imaging, in five of the seven patients, the intratesticular process was bilateral, involved the mediastinum testis, began at the periphery adjacent to the spermatocele, and extended for a variable distance within the testis. On sonograms, the lesion was hypoechoic with coarse internal echoes. MR imaging of six of the seven patients showed characteristic findings and allowed the identification of two additional testicles with tubular ectasia that were missed sonographically. Lesions had a homogeneous signal similar to that of the coexisting spermatocele with all pulse sequences. They were hypointense relative to the testis on T1- and proton density-weighted images and, unlike tumors, were not visible on T2-weighted images. CONCLUSION. Our experience suggests that ectasia of the seminiferous tubules can be distinguished from testicular tumor on the basis of characteristic clinical, sonographic, and MR imaging findings. Thus, orchiectomy is unnecessary to establish the diagnosis and to rule out tumor. C1 USN,DEPT RADIOL,SAN DIEGO,CA 92134. RP TARTAR, VM (reprint author), UNIV CALIF SAN DIEGO,MED CTR,DEPT RADIOL,410 DICKINSON ST,SAN DIEGO,CA 92103, USA. FU NCI NIH HHS [K08-CA01319] NR 11 TC 37 Z9 39 U1 0 U2 1 PU AMER ROENTGEN RAY SOC PI RESTON PA 1891 PRESTON WHITE DR, SUBSCRIPTION FULFILLMENT, RESTON, VA 22091 SN 0361-803X J9 AM J ROENTGENOL JI Am. J. Roentgenol. PD MAR PY 1993 VL 160 IS 3 BP 539 EP 542 PG 4 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA KM935 UT WOS:A1993KM93500016 PM 8430548 ER PT J AU TAWFIKELZIMAITY, DM HYAMS, KC IMAM, IZE WATTS, DM BASSILY, S NAFFEA, EK SULTAN, Y EMARA, K BURANS, J PURDY, MA BRADLEY, DW CARL, M AF TAWFIKELZIMAITY, DM HYAMS, KC IMAM, IZE WATTS, DM BASSILY, S NAFFEA, EK SULTAN, Y EMARA, K BURANS, J PURDY, MA BRADLEY, DW CARL, M TI ACUTE SPORADIC HEPATITIS-E IN AN EGYPTIAN PEDIATRIC POPULATION SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID NON-B-HEPATITIS; NON-A; VIRUS-INFECTION; C VIRUS; CAIRO; ETIOLOGY; ADULTS; RISK AB A study was conducted to determine the etiology of acute hepatitis among 261 children (age range 1-11 years) living in Cairo, Egypt. A blood sample was obtained from each subject when initially evaluated and a questionnaire was used to collect demographic and risk factor data. Sera were tested by enzyme immunoassay for acute hepatitis A (anti-hepatitis A virus IgM), hepatitis B (anti-hepatitis B core antigen IgM and hepatitis B surface antigen [HBsAg]), hepatitis C (total anti-HCV), delta hepatitis (total anti-delta), and cytomegalovirus infection (anti-CMV IgM). In addition, hepatitis E virus (HEV) infection was diagnosed using a new Western blot technique to test patients with non-A, non-B hepatitis for anti-HEV IgM. Among 261 children, acute hepatitis A was diagnosed in 85 (32.6%) patients, acute hepatitis B in 19 (7.3%), delta hepatitis in 3 (1.1%), mixed hepatitis A and B infection in 2 (0.8%), CMV infection in 1 (0.4%), hepatitis E in 58 (22.2%), and non-A, non-B hepatitis of unknown type in 51 (19.5%). Forty-two (16.1%) subjects had HBsAg without other markers of acute infection. Risk factor analysis indicated that patients living in homes not connected to a municipal source of water were at increased risk of hepatitis E infection. These data provide additional evidence that hepatitis E virus is a common cause of acute sporadic hepatitis in children living in Egypt. C1 USN,MED RES INST,DIV EPIDEMIOL,BETHESDA,MD 20814. USN,MED RES UNIT 3,CAIRO,EGYPT. CTR DIS CONTROL,HEPATITIS BRANCH,ATLANTA,GA 30333. ABBASSIA FEVER HOSP,CAIRO,EGYPT. RP TAWFIKELZIMAITY, DM (reprint author), BENHA UNIV,DEPT MICROBIOL,BENHA,EGYPT. NR 20 TC 2 Z9 2 U1 0 U2 0 PU AMER SOC TROP MED & HYGIENE PI MCLEAN PA 8000 WESTPARK DRIVE SUITE 130, MCLEAN, VA 22101 SN 0002-9637 J9 AM J TROP MED HYG JI Am. J. Trop. Med. Hyg. PD MAR PY 1993 VL 48 IS 3 BP 372 EP 376 PG 5 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA KX849 UT WOS:A1993KX84900011 ER PT J AU PORTER, KR SUMMERS, PL DUBOIS, D PURI, B NELSON, W HENCHAL, E OPRANDY, JJ HAYES, CG AF PORTER, KR SUMMERS, PL DUBOIS, D PURI, B NELSON, W HENCHAL, E OPRANDY, JJ HAYES, CG TI DETECTION OF WEST NILE VIRUS BY THE POLYMERASE CHAIN-REACTION AND ANALYSIS OF NUCLEOTIDE-SEQUENCE VARIATION SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article AB A polymerase chain reaction (PCR) assay was developed to rapidly detect and identify West Nile (WN) virus. The RNA from seven isolates of WN virus from six countries and four other flaviviruses (Kunjin, Japanese encephalitis, St. Louis encephalitis, and yellow fever viruses) was reverse-transcribed (RT) and amplified by PCR. The nucleotide sequences of the amplified products were determined by a rapid, automated DNA sequencing method. The WN virus RT/PCR assay detected the target gene segment of isolates from both the African-Middle Eastern group and the Indian group with a sensitivity of approximately 0.05 pg of viral RNA. Kunjin virus was the only other flavivirus tested that produced a band of the appropriate size. Five of seven WN virus isolates showed 92-98% homology in the nucleotide sequence of their PCR products. The sequence of one isolate was virtually identical to the published sequence of the Nigerian isolate (99.5% homology). No correlation was established between the degree of nucleotide homology, geographic location, time of isolation, or source of the isolates. C1 WALTER REED ARMY INST RES,WASHINGTON,DC 20307. RP PORTER, KR (reprint author), USN,MED RES INST,INFECT DIS THREAT ASSESSMENT PROGRAM,BETHESDA,MD 20814, USA. NR 10 TC 28 Z9 29 U1 0 U2 2 PU AMER SOC TROP MED & HYGIENE PI MCLEAN PA 8000 WESTPARK DRIVE SUITE 130, MCLEAN, VA 22101 SN 0002-9637 J9 AM J TROP MED HYG JI Am. J. Trop. Med. Hyg. PD MAR PY 1993 VL 48 IS 3 BP 440 EP 446 PG 7 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA KX849 UT WOS:A1993KX84900019 PM 8470779 ER PT J AU WEIR, MD AF WEIR, MD TI TAPE COUNTERS SO AMERICAN MATHEMATICAL MONTHLY LA English DT Letter RP WEIR, MD (reprint author), USN,POSTGRAD SCH,MONTEREY,CA 93943, USA. RI Weir, Michael/M-7729-2013 OI Weir, Michael/0000-0002-7961-3787 NR 2 TC 0 Z9 0 U1 0 U2 0 PU MATHEMATICAL ASSOC AMER PI WASHINGTON PA 1529 18TH STREET NW, WASHINGTON, DC 20036 SN 0002-9890 J9 AM MATH MON JI Am. Math. Mon. PD MAR PY 1993 VL 100 IS 3 BP 285 EP 286 PG 2 WC Mathematics SC Mathematics GA KT082 UT WOS:A1993KT08200013 ER PT J AU WATERS, JH RAMANATHAN, S CHUBA, JV AF WATERS, JH RAMANATHAN, S CHUBA, JV TI GLUCOSE IN EPIDURAL CATHETER ASPIRATE SO ANESTHESIA AND ANALGESIA LA English DT Article ID PLASMA AB Frequently fluid may be aspirated from epidural catheters during epidural anesthesia/analgesia. This fluid may be either cerebrospinal fluid or local anesthetic. Several methods for differentiation of the two fluids have been recommended. In this study, the reliability of the ''glucose test'' was analyzed. Epidural catheters were inserted into 43 healthy, nondiabetic parturients and then gently aspirated. Aspirate was tested for glucose using glucose oxidase paper. Positive aspirates were assessed for the presence of prealbumin, which is a protein marker for cerebrospinal fluid. Of the patients undergoing cesarean section, 17 of 27 patients yielded a glucose-positive aspirate, and of the patients undergoing labor analgesia, 6 of 16 patients were found to be positive for glucose. None of these patients developed total spinal anesthesia or postdural puncture headache. Visually, none of the aspirates were significantly blood-tinged, blood being a possible source of glucose. When the glucose-positive aspirates were subjected to immunoelectrophoresis, 6 of 7 aspirates revealed a prealbumin band. In conclusion, the glucose test for cerebrospinal fluid may be misleading. The source of this glucose may be normal cerebrospinal fluid drainage into the epidural space. C1 USN HOSP,DEPT ANESTHESIOL,SAN DIEGO,CA 92134. NYU MED CTR,DEPT PATHOL,NEW YORK,NY 10016. NYU MED CTR,DEPT ANESTHESIOL,NEW YORK,NY 10016. RP WATERS, JH (reprint author), USN HOSP,DEPT CLIN INVEST,SAN DIEGO,CA 92134, USA. NR 10 TC 7 Z9 7 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0003-2999 J9 ANESTH ANALG JI Anesth. Analg. PD MAR PY 1993 VL 76 IS 3 BP 546 EP 548 PG 3 WC Anesthesiology SC Anesthesiology GA KY040 UT WOS:A1993KY04000016 PM 8452264 ER PT J AU BURGER, GA HOWARD, R AF BURGER, GA HOWARD, R TI ACIDOSIS AND [K+] SO ANESTHESIA AND ANALGESIA LA English DT Letter RP BURGER, GA (reprint author), USN HOSP,DEPT ANESTHESIOL,SAN DIEGO,CA 92134, USA. NR 9 TC 2 Z9 2 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0003-2999 J9 ANESTH ANALG JI Anesth. Analg. PD MAR PY 1993 VL 76 IS 3 BP 680 EP 680 DI 10.1213/00000539-199303000-00070 PG 1 WC Anesthesiology SC Anesthesiology GA KY040 UT WOS:A1993KY04000070 PM 8452303 ER PT J AU WALLACE, MR BRODINE, SK OLDFIELD, EC AF WALLACE, MR BRODINE, SK OLDFIELD, EC TI DOES ACYCLOVIR WORSEN LATE VARICELLA - REPLY SO ANNALS OF INTERNAL MEDICINE LA English DT Letter RP WALLACE, MR (reprint author), USN HOSP,SAN DIEGO,CA 92134, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER COLL PHYSICIANS PI PHILADELPHIA PA INDEPENDENCE MALL WEST 6TH AND RACE ST, PHILADELPHIA, PA 19106-1572 SN 0003-4819 J9 ANN INTERN MED JI Ann. Intern. Med. PD MAR 1 PY 1993 VL 118 IS 5 BP 394 EP 395 PG 2 WC Medicine, General & Internal SC General & Internal Medicine GA KN688 UT WOS:A1993KN68800017 ER PT J AU MONTGOMERY, WW SAMSON, MJ VARVARES, MA GOODMAN, ML AF MONTGOMERY, WW SAMSON, MJ VARVARES, MA GOODMAN, ML TI CUTANEOUS SQUAMOUS-CELL CARCINOMA OCCURRING IN A PECTORALIS MAJOR MYOCUTANEOUS FLAP - CASE-REPORT AND LITERATURE-REVIEW SO ANNALS OF OTOLOGY RHINOLOGY AND LARYNGOLOGY LA English DT Review DE MOUTH NEOPLASMS; SQUAMOUS CELL CARCINOMA; SURGICAL FLAPS ID RECONSTRUCTION AB The pectoralis major myocutaneous flap is a reliable regional flap commonly used for the reconstruction of head and neck defects. We report a case of a squamous cell carcinoma that occurred on the cutaneous paddle of a pectoralis flap in a patient with previous chest wall lesions. The need for a careful history of previous chest wall cutaneous lesions is stressed in patients who are to undergo this type of reconstruction. C1 USN HOSP,DEPT OTOLARYNGOL HEAD & NECK SURG,PORTSMOUTH,VA. RP MONTGOMERY, WW (reprint author), HARVARD UNIV,MASSACHUSETTS EYE & EAR INFIRM,SCH MED,DEPT OTOLARYNGOL,243 CHARLES ST,BOSTON,MA 02114, USA. NR 6 TC 5 Z9 5 U1 0 U2 1 PU ANNALS PUBL CO PI ST LOUIS PA 4507 LACLEDE AVE, ST LOUIS, MO 63108 SN 0003-4894 J9 ANN OTO RHINOL LARYN JI Ann. Otol. Rhinol. Laryngol. PD MAR PY 1993 VL 102 IS 3 BP 206 EP 208 PN 1 PG 3 WC Otorhinolaryngology SC Otorhinolaryngology GA KT618 UT WOS:A1993KT61800007 PM 8457122 ER PT J AU ATKINS, GP AF ATKINS, GP TI INSTITUTIONAL ARRANGEMENTS FOR HEMISPHERIC FREE-TRADE SO ANNALS OF THE AMERICAN ACADEMY OF POLITICAL AND SOCIAL SCIENCE LA English DT Article AB Three outcomes of the problem of institutionalizing hemispheric free trade seem possible: (1) a U.S.-centered series of multilateral and bilateral free trade areas in which only the United States enjoys truly hemispheric free trade; (2) a set of integrated subregional free trade agreements, emanating from the North American Free Trade Area if it is completed; or (3) a hemispherewide system coordinated by inter-American agencies-its realization, if it is to be, is a long way away. RP ATKINS, GP (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 6 TC 1 Z9 1 U1 0 U2 1 PU SAGE PUBLICATIONS INC PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 SN 0002-7162 J9 ANN AM ACAD POLIT SS JI Ann. Am. Acad. Polit. Soc. Sci. PD MAR PY 1993 VL 526 BP 183 EP 194 DI 10.1177/0002716293526001015 PG 12 WC Political Science; Social Sciences, Interdisciplinary SC Government & Law; Social Sciences - Other Topics GA KL729 UT WOS:A1993KL72900015 ER PT J AU HARFF, B AF HARFF, B TI THE TRAGEDY OF CAMBODIAN HISTORY - CHANDLER,DP SO ANNALS OF THE AMERICAN ACADEMY OF POLITICAL AND SOCIAL SCIENCE LA English DT Book Review RP HARFF, B (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU SAGE PUBLICATIONS INC PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 SN 0002-7162 J9 ANN AM ACAD POLIT SS JI Ann. Am. Acad. Polit. Soc. Sci. PD MAR PY 1993 VL 526 BP 205 EP 206 DI 10.1177/0002716293526001024 PG 2 WC Political Science; Social Sciences, Interdisciplinary SC Government & Law; Social Sciences - Other Topics GA KL729 UT WOS:A1993KL72900026 ER PT J AU PICKETT, WE KRAKAUER, H COHEN, RE AF PICKETT, WE KRAKAUER, H COHEN, RE TI ELECTRON-PHONON COUPLING IN HIGH-TEMPERATURE SUPERCONDUCTORS - THE CONNECTION TO SUPERCONDUCTING BEHAVIOR SO APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT 3RD INTERNATIONAL CONF AND EXHIBITION OF THE WORLD CONGRESS ON SUPERCONDUCTIVITY CY SEP 15-18, 1992 CL MUNICH, GERMANY SP WORLD CONGRESS SUPERCONDUCT, NASA, DARPA, SW BELL, IEEE, KRISHEN FDN ID TRANSITION; YBA2CU3O7 AB The results of recent calculations of the frequency, linewidths, and coupling strengths to carriers on the Fermi surface for several phonons in La1.85Sr0.15CuO4 (LSCO) [our work] and YBa2Cu3O7 (YBCO) [by the Stuttgart group] are discussed and related to experiment. The estimates of the electron-phonon coupling constant are lambda = 1.35 for LSCO based on 11 phonons, and lambda = 1.7 for YBCO based on 17 phonons. These coupling strengths are large enough to make the electron-phonon interaction a central feature in normal state transport properties and a likely candidate for the pairing mechanism for high temperature superconductivity. The strong coupling arises from features that are generic in the high temperature superconducting cuprates: a modest (certainly not large) density of states at the Fermi level which results in weak screening; a confinement of the metallic electrons to layers separated by dielectric regions, which further weakens screening and results in Madelung-like contributions to electron-phonon matrix elements; the site energies of the Cu d states and the O p states are roughly equal, leading to strong hybridization and highly metallic bands at tbe Fermi level. C1 COLL WILLIAM & MARY,WILLIAMSBURG,VA 23187. GEOPHYS LAB,WASHINGTON,DC 20015. RP PICKETT, WE (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Cohen, Ronald/B-3784-2010; OI Cohen, Ronald/0000-0001-5871-2359; Krakauer, Henry/0000-0003-2517-0957 NR 20 TC 1 Z9 1 U1 0 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0964-1807 J9 APPL SUPERCOND JI Appl. Supercond. PD MAR-JUN PY 1993 VL 1 IS 3-6 BP 251 EP 262 DI 10.1016/0964-1807(93)90236-U PG 12 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA KT599 UT WOS:A1993KT59900014 ER PT J AU RAO, AS AF RAO, AS TI PROPERTIES OF SUPERCONDUCTING YBA2CU3O6+X CERAMIC MATERIALS - EFFECT OF PROCESSING PARAMETERS SO APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT 3RD INTERNATIONAL CONF AND EXHIBITION OF THE WORLD CONGRESS ON SUPERCONDUCTIVITY CY SEP 15-18, 1992 CL MUNICH, GERMANY SP WORLD CONGRESS SUPERCONDUCT, NASA, DARPA, SW BELL, IEEE, KRISHEN FDN ID TEMPERATURE; DEFORMATION AB The effect of the sintering temperature, the sintering time and the addition of 5 wt.% silver on the average particle size, bulk density and the superconducting zero resistance temperature (T(c)) and the normal state resistivity measured at 100 K of YBa2Cu3O6+x ceramic materials was investigated. The sintered specimens were produced from sintering the dry pressed powders (a) at different temperatures in the range 880 - 940-degrees-C for 2 hours and (b) at 920-degrees-C for different times in the range 0 - 10 hours. The results suggest that while the density and particle size of the sintered ceramic increases with an increase of the sintering temperature (and 2 hours of sintering), prolonged sintering (at 920-degrees-C) above 4 hours of duration does not improve the above properties. The normal state resistivity, measured at 100 K, decreases with an increase of both the sintering temperature and sintering time. However, the superconducting zero resistance temperature (T(c)) does not change significantly. In the presence of 5 wt.% silver, it appears that both sintering temperature and duration of sintering significantly improves the bulk density, particle size and T(c) of YBa2Cu3O6+x. In addition, it also appears that if the sintering temperature is above 920-degrees-C, some YBa2Cu3O6+x particles tend to align in a preferred direction. RP RAO, AS (reprint author), USN,CTR SURFACE WARFARE,ANNAPOLIS,MD 21402, USA. NR 9 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 0964-1807 J9 APPL SUPERCOND JI Appl. Supercond. PD MAR-JUN PY 1993 VL 1 IS 3-6 BP 607 EP 625 DI 10.1016/0964-1807(93)90273-5 PG 19 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA KT599 UT WOS:A1993KT59900051 ER PT J AU RAO, AS AF RAO, AS TI PROCESSING AND PROPERTY EVALUATION OF YBA2CU3O6+X ALUMINUM-COMPOSITES SO APPLIED SUPERCONDUCTIVITY LA English DT Article; Proceedings Paper CT 3RD INTERNATIONAL CONF AND EXHIBITION OF THE WORLD CONGRESS ON SUPERCONDUCTIVITY CY SEP 15-18, 1992 CL MUNICH, GERMANY SP WORLD CONGRESS SUPERCONDUCT, NASA, DARPA, SW BELL, IEEE, KRISHEN FDN ID SUPERCONDUCTIVITY; SYSTEM AB The structure, morphology and superconducting ProPerties Of (0 - 60 wt.%) aluminum / (100 - 40 wt.% YBa2Cu3O6+x composites were investigated as a function of processing parameters. The electrical resistivity results suggest that tbe composites containing 60 wt.% aluminum show a transitional region. The critical current values measured at the liquid nitrogen temperature and zero magnetic field were found to be 50 amp cm-2 and 10 - 15 amp cm-2 for small samples and 50 cm long coils respectively. The microstructural examination of the samples revealed that the extrusion process, that was used to produce long wires or tapes tends to introduce an uneven distribution of superconducting YBa2Cu3O6+x particles ir. the aluminum matrix. It is possible that such an uneven distribution of YBa2Cu3O6+x has resulted in the lowering of critical current from 50 amp cm-2 to 10 - 15 amp cm-2. RP RAO, AS (reprint author), USN,CTR SURFACE WARFARE,ANNAPOLIS,MD 21402, USA. NR 14 TC 2 Z9 2 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0964-1807 J9 APPL SUPERCOND JI Appl. Supercond. PD MAR-JUN PY 1993 VL 1 IS 3-6 BP 725 EP 736 DI 10.1016/0964-1807(93)90282-7 PG 12 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA KT599 UT WOS:A1993KT59900060 ER PT J AU JERNIGAN, TL ARCHIBALD, S HESSELINK, JR ATKINSON, JH VELIN, RA MCCUTCHAN, JA CHANDLER, J GRANT, I AF JERNIGAN, TL ARCHIBALD, S HESSELINK, JR ATKINSON, JH VELIN, RA MCCUTCHAN, JA CHANDLER, J GRANT, I TI MAGNETIC-RESONANCE-IMAGING MORPHOMETRIC ANALYSIS OF CEREBRAL VOLUME LOSS IN HUMAN-IMMUNODEFICIENCY-VIRUS INFECTION SO ARCHIVES OF NEUROLOGY LA English DT Article ID AIDS DEMENTIA COMPLEX; HIV-INFECTION; BRAIN; CT; MR; MANIFESTATIONS; ENCEPHALOPATHY; LOCALIZATION; ENCEPHALITIS; INDIVIDUALS AB Magnetic resonance imaging was used to compare male subjects seropositive for antibody to human immunodeficiency virus type 1 (HIV positive), with and without medical symptoms, with two groups of men who were seronegative (HIV negative). The control subjects included men at high risk for exposure to HIV-1 and those at low risk. None of the HIV-positive subjects met criteria for HIV-associated dementia or had detectable opportunistic brain disease. Quantitative image-analytic techniques were used to estimate volumes of ventricular and cortical cerebrospinal fluid, cerebral white matter, and cortical and subcortical gray matter structures. Relative to low-risk group control subjects and asymptomatic HIV-positive subjects, nondemented but medically symptomatic HIV-positive subjects showed significant increases in cerebrospinal fluid, reduced volume of cerebral white matter, and reduced cerebral gray matter volumes. Unexpectedly, however, some cerebrospinal fluid increases and gray matter volume decreases were present in the seronegative high-risk control subjects as well. C1 DEPT VET AFFAIRS MED CTR,SAN DIEGO,CA. USN,SAN DIEGO,CA 92132. RP JERNIGAN, TL (reprint author), UNIV CALIF SAN DIEGO,SCH MED,DEPT PSYCHIAT,0631-P,9500 GILMAN DR,LA JOLLA,CA 92093, USA. FU NIMH NIH HHS [5 P50 MH45294, 5 R01 MH43298] NR 33 TC 100 Z9 102 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0003-9942 J9 ARCH NEUROL-CHICAGO JI Arch. Neurol. PD MAR PY 1993 VL 50 IS 3 BP 250 EP 255 PG 6 WC Clinical Neurology SC Neurosciences & Neurology GA KQ120 UT WOS:A1993KQ12000006 PM 8442702 ER PT J AU SCHOEM, SR WATKINS, GL KUHN, JJ ALBURGER, JF KIM, KZ THOMPSON, DH AF SCHOEM, SR WATKINS, GL KUHN, JJ ALBURGER, JF KIM, KZ THOMPSON, DH TI CONTROL OF EARLY POSTOPERATIVE PAIN WITH BUPIVACAINE IN ADULT LOCAL TONSILLECTOMY SO ARCHIVES OF OTOLARYNGOLOGY-HEAD & NECK SURGERY LA English DT Article AB Early postoperative pain following tonsillectomy remains a significant obstacle to speedy recovery and smooth convalescence. Inadequate analgesia causes poor oral intake and occasionally requires overnight hospitalization in same-day surgery practices. Although several otolaryngologists anecdotally support intraoperative infiltration with long-acting anesthetic agents for postoperative pain control, to our knowledge, no previous study confirms this claim. In a prior investigation, we found no difference between bupivacaine hydrochloride and saline placebo in pediatric patients undergoing tonsillectomy. In this trial, we performed a similar study in an adult population. Fifty-one patients undergoing tonsillectomy with local anesthesia were randomized into bupivacaine or saline placebo groups. Patients provided the following data: (1) pain level; (2) oral intake; (3) number of pain medication doses; and (4) level of pain on jaw opening, all at 10 hours postoperatively. Bupivacaine administration resulted in no adverse effects. No difference was noted in pain level, amount of oral intake, or pain on full jaw opening. Bupivacaine group patients received fewer though not statistically significant doses of pain medication than placebo group patients. We conclude that bupivacaine is a safe medication but offers no advantage in the control of early postoperative pain in adult patients under in local tonsillectomy. RP SCHOEM, SR (reprint author), USN,NATL MED CTR,DEPT OTOLARYNGOL HEAD & NECK SURG,BETHESDA,MD 20889, USA. NR 6 TC 36 Z9 36 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0886-4470 J9 ARCH OTOLARYNGOL JI Arch. Otolaryngol. Head Neck Surg. PD MAR PY 1993 VL 119 IS 3 BP 292 EP 293 PG 2 WC Otorhinolaryngology; Surgery SC Otorhinolaryngology; Surgery GA KQ559 UT WOS:A1993KQ55900006 PM 8435168 ER PT J AU CHARNOCK, DR CHAPMAN, GD WOZNIAK, A TAYLOR, RE AF CHARNOCK, DR CHAPMAN, GD WOZNIAK, A TAYLOR, RE TI RECURRENT TONSILLITIS - THE ROLE OF CHLAMYDIA AND MYCOPLASMA - REPLY SO ARCHIVES OF OTOLARYNGOLOGY-HEAD & NECK SURGERY LA English DT Letter ID TRACHOMATIS; CULTURE; INFANTS C1 USA,WASHINGTON,DC 20310. USN,RUTLAND,VT. RP CHARNOCK, DR (reprint author), USNR,WASHINGTON,DC, USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0886-4470 J9 ARCH OTOLARYNGOL JI Arch. Otolaryngol. Head Neck Surg. PD MAR PY 1993 VL 119 IS 3 BP 355 EP 356 PG 2 WC Otorhinolaryngology; Surgery SC Otorhinolaryngology; Surgery GA KQ559 UT WOS:A1993KQ55900019 ER PT J AU GATES, WR AF GATES, WR TI SMALL WARS, BIG DEFENSE - PAYING FOR THE MILITARY AFTER THE COLD-WAR - WEIDENBAUM,M SO ARMED FORCES & SOCIETY LA English DT Book Review RP GATES, WR (reprint author), USN,POSTGRAD SCH,WASHINGTON,DC 20350, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU TRANSACTION PERIOD CONSORTIUM PI NEW BRUNSWICK PA DEPT 3091 RUTGERS-THE STATE UNIV OF NJ, NEW BRUNSWICK, NJ 08903 SN 0095-327X J9 ARMED FORCES SOC JI Armed Forces Soc. PD SPR PY 1993 VL 19 IS 3 BP 455 EP 458 DI 10.1177/0095327X9301900311 PG 4 WC Political Science; Sociology SC Government & Law; Sociology GA LA698 UT WOS:A1993LA69800010 ER PT J AU CLARK, FO TORBETT, MV JACKSON, AA PRICE, SD KENNEALY, JP NOAH, PV GLAUDELL, GA COBB, M AF CLARK, FO TORBETT, MV JACKSON, AA PRICE, SD KENNEALY, JP NOAH, PV GLAUDELL, GA COBB, M TI THE OUT-OF-PLANE DISTRIBUTION OF ZODIACAL DUST NEAR THE EARTH SO ASTRONOMICAL JOURNAL LA English DT Article ID SOLAR-SYSTEM; EMISSION AB Analysis of IRAS data of the thermal zodiacal emission reveals an out-of-plane dust distribution near the Earth which is well-represented by a Lorentzian function. We suggest a possible explanation for the similarity as near-Earth gravitational perturbations of dust grains. Such perturbations are expected to be chaotic and will randomize any residual band structure near the Earth. C1 MACON COLL,DIV NAT SCI & MATH,MACON,GA 31297. MISSION RES CORP,NASHUA,NH 03062. HARVARD UNIV,DEPT ASTRON,CAMBRIDGE,MA 02138. USN,RES LAB,WASHINGTON,DC 20375. RP CLARK, FO (reprint author), PHILLIPS LAB,GEOPHYS DIRECTORATE,BACKGROUNDS BRANCH,BEDFORD,MA 01731, USA. NR 20 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 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 1993 VL 105 IS 3 BP 976 EP 979 DI 10.1086/116486 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KQ553 UT WOS:A1993KQ55300017 ER PT J AU VRBA, FJ COYNE, GV TAPIA, S AF VRBA, FJ COYNE, GV TAPIA, S TI AN INVESTIGATION OF GRAIN PROPERTIES IN THE RHO OPHIUCHI DARK CLOUD SO ASTRONOMICAL JOURNAL LA English DT Article ID SELECTIVE EXTINCTION; OPTICAL POLARIZATION; ABNORMAL EXTINCTION; SIZE DISTRIBUTION; CLUSTER; STARS; RATIO; DUST; POLARIMETER; ABSORPTION AB We present a comprehensive study of dust grains in the rho Ophiuchi dark cloud. By combining new polarimetric, optical photometric, and spectral classification data for 134 stars, cloud material is probed to an absorption depth of A(V) less-than-or-equal-to 5-7 mag. For stars with R determined from the color-difference method, a mean value of R = 3.99 +/- 0.18 at a mean extinction of A(V) = 3.25 mag is found. R scales with the wavelength of maximum polarization at the rate R = 5.7lambda(max), consistent with results from other studies. Grain size, as deduced from lambda(max), increases with optical depth in a manner that is consistent with a simple model of turbulence-driven coagulative grain growth. Grain alignment is characterized by a mean P(V)(%)/A(V)(mag) = 0.91. The alignment decreases with both optical depth and grain size at rates which are consistent with classical B field alignment and the grain growth model. Comparison of the relative grain size distributions for rho Oph with other dark clouds, shows a clear progression from that of the largest mean grain size and dispersion for the youngest clouds to that of the normal distribution for the general interstellar medium. These results suggest that large grains are produced predominantly in very early stages of cloud evolution and that, after 10(6) yr, grain evolution is mainly a process of destroying larger grains, at least for the outer several magnitudes of A(V). C1 VATICAN OBSERV,VATICAN CITY 00120,VATICAN. MIT,LINCOLN LAB,LEXINGTON,MA 02173. RP VRBA, FJ (reprint author), USN OBSERV,FLAGSTAFF STN,FLAGSTAFF,AZ 86002, USA. NR 72 TC 72 Z9 72 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 1993 VL 105 IS 3 BP 1010 EP 1026 DI 10.1086/116489 PG 17 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KQ553 UT WOS:A1993KQ55300020 ER PT J AU HARRIS, HC HUNTER, DA BAUM, WA JONES, JH AF HARRIS, HC HUNTER, DA BAUM, WA JONES, JH TI PHOTOMETRIC CALIBRATION OF THE HST WIDE-FIELD PLANETARY CAMERA .2. GROUND-BASED OBSERVATIONS OF CALIBRATION FIELDS SO ASTRONOMICAL JOURNAL LA English DT Article AB Ground-based CCD observations have been made simulating the photometric properties of the Wide-Field/Planetary Camera (WF/PC) of the Hubble Space Telescope. This paper gives results in 15 of the most important WF/PC passbands for two fields chosen to provide efficient in-flight calibration of the WF/PC. These calibration fields are located in the outskirts of the globular clusters omega Cen and NGC 6752. C1 LOWELL OBSERV,FLAGSTAFF,AZ 86001. RP HARRIS, HC (reprint author), USN OBSERV,POB 1149,FLAGSTAFF,AZ 86002, USA. NR 7 TC 17 Z9 17 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAR PY 1993 VL 105 IS 3 BP 1196 EP 1206 DI 10.1086/116504 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KQ553 UT WOS:A1993KQ55300035 ER PT J AU VERMEULEN, RC MCADAM, WB TRUSHKIN, SA FACONDI, SR FIEDLER, RL HJELLMING, RM JOHNSTON, KJ CORBIN, J AF VERMEULEN, RC MCADAM, WB TRUSHKIN, SA FACONDI, SR FIEDLER, RL HJELLMING, RM JOHNSTON, KJ CORBIN, J TI DAILY SPECTRA OF RADIO FLARES FROM SS433 IN MAY JUNE 1987 SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE SS-433; RADIO CONTINUUM, STARS; SYNCHROTRON RADIATION; STARS, FLARE; JETS ID 8085 MHZ; SS-433 AB Total radio flux density measurements of SS 433 at frequencies from 0.4 to 22 GHz were obtained in May/June 1987 as part of a multi-wavelength observing campaign. During a period of thirty-seven days observations were done daily at many frequencies. We have observed a transition of SS 433 from its quiescent mode to the flaring state, and we study a total of five flares. The first of these events has different characteristics than the others. Older data support the existence of two types of flares. All flares exhibit an excess flux density below 1 GHz. We conclude that complex models are needed, involving the sustained generation of relativistic electrons. As the flare evolves, it is probable that the energy spectrum of the generated particles softens. Our data provide spectral information, to be combined in a later paper with the evolution observed in VLBI imaging. C1 LEIDEN OBSERV, 2300 RA LEIDEN, NETHERLANDS. SPECIAL ASTROPHYS OBSERV, STAVROPOL 357140, RUSSIA. IST RADIOASTRON, I-40126 BOLOGNA, ITALY. NRAO, SOCORRO, NM 87801 USA. UNIV SYDNEY, SCH PHYS, SYDNEY, NSW 2006, AUSTRALIA. USN, RES LAB, CTR ADV SPACE SENSING, WASHINGTON, DC 20375 USA. UNIV SYDNEY, DEPT ELECT ENGN, SYDNEY, NSW 2006, AUSTRALIA. NR 23 TC 8 Z9 8 U1 0 U2 0 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAR PY 1993 VL 270 IS 1-2 BP 189 EP 199 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KU567 UT WOS:A1993KU56700024 ER PT J AU BHATIA, AK DOSCHEK, GA AF BHATIA, AK DOSCHEK, GA TI ATOMIC DATA AND SPECTRAL-LINE INTENSITIES FOR C-LIKE CA(XV) SO ATOMIC DATA AND NUCLEAR DATA TABLES LA English DT Article ID CROSS-SECTIONS C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. RP BHATIA, AK (reprint author), NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771, USA. NR 8 TC 24 Z9 24 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 0092-640X J9 ATOM DATA NUCL DATA JI Atom. Data Nucl. Data Tables PD MAR PY 1993 VL 53 IS 2 BP 195 EP 232 DI 10.1006/adnd.1993.1005 PG 38 WC Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Physics GA KZ271 UT WOS:A1993KZ27100002 ER PT J AU DOWELL, GL AF DOWELL, GL TI RATIONALE FOR A HYPERBARIC TREATMENT CAPABILITY AT A LUNAR STATION SO AVIATION SPACE AND ENVIRONMENTAL MEDICINE LA English DT Note ID SPACE AB Missions to establish a permanent presence on the Moon will include a significant amount of extravehicular activity (EVA), which carries the risk of decompression sickness (DCS). Factors which will influence that risk include: cabin and space suit pressure environments, frequency of and activity level during EVA, and the possibility of a loss-of-pressure mishap. These factors were considered for Space Station Freedom (SSF), resulting in the decision to include a hyperbaric airlock capable of treating DCS. Using concepts from operational medicine, the need for such a capability is determined by its influence on mission risk. In comparison to SSF, a Lunar Station will have gravity, a higher EVA rate, physically more DCS provocative EVA, and little, if any, capacity for medical evacuation. Therefore, unless Lunar mission planners can provide pressure environments that offer near zero risk of DCS for nominal operations, a hyperbaric treatment capability should be included. C1 USN,INST AEROSP MED,PENSACOLA,FL. NR 12 TC 1 Z9 1 U1 0 U2 0 PU AEROSPACE MEDICAL ASSOC PI ALEXANDRIA PA 320 S HENRY ST, ALEXANDRIA, VA 22314-3579 SN 0095-6562 J9 AVIAT SPACE ENVIR MD JI Aviat. Space Environ. Med. PD MAR PY 1993 VL 64 IS 3 BP 243 EP 246 PG 4 WC Public, Environmental & Occupational Health; Medicine, General & Internal; Sport Sciences SC Public, Environmental & Occupational Health; General & Internal Medicine; Sport Sciences GA KQ755 UT WOS:A1993KQ75500012 PM 8447809 ER PT J AU JACOB, RJK LEGGETT, JJ MYERS, BA PAUSCH, R AF JACOB, RJK LEGGETT, JJ MYERS, BA PAUSCH, R TI INTERACTION STYLES AND INPUT-OUTPUT DEVICES SO BEHAVIOUR & INFORMATION TECHNOLOGY LA English DT Article ID HUMAN-COMPUTER INTERACTION C1 TEXAS A&M UNIV SYST,DEPT COMP SCI,COLL STN,TX 77843. CARNEGIE MELLON UNIV,SCH COMP SCI,PITTSBURGH,PA 15213. UNIV VIRGINIA,DEPT COMP SCI,CHARLOTTESVILLE,VA 22903. RP JACOB, RJK (reprint author), USN,RES LAB,HUMAN COMP INTERACT LAB,WASHINGTON,DC 20375, USA. NR 38 TC 25 Z9 25 U1 0 U2 3 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0144-929X J9 BEHAV INFORM TECHNOL JI Behav. Inf. Technol. PD MAR-APR PY 1993 VL 12 IS 2 BP 69 EP 79 PG 11 WC Computer Science, Cybernetics; Ergonomics SC Computer Science; Engineering GA LB698 UT WOS:A1993LB69800003 ER PT J AU BRANDOW, SL TURNER, DC RATNA, BR GABER, BP AF BRANDOW, SL TURNER, DC RATNA, BR GABER, BP TI MODIFICATION OF SUPPORTED LIPID-MEMBRANES BY ATOMIC FORCE MICROSCOPY SO BIOPHYSICAL JOURNAL LA English DT Article ID LANGMUIR-BLODGETT-FILMS; MOLECULAR-RESOLUTION; PURPLE MEMBRANES; SURFACE FORCES; SCALE FRICTION; TUNGSTEN TIP AB The atomic force microscope (AFM) was used to structurally modify supported lipid bilayers in a controlled quantitative manner. By increasing the force applied by the AFM tip, lipid was removed from the scanned area, leaving a cut through the lipid bilayer. Cuts were repaired with the AFM by scanning the region with a controlled force and driving lipid back into the cut. A slow self-annealing of cuts was also observed. RP BRANDOW, SL (reprint author), USN,RES LAB,CTR BIOMOLEC SCI & ENGN,CODE 6900,WASHINGTON,DC 20375, USA. NR 22 TC 27 Z9 27 U1 0 U2 3 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD MAR PY 1993 VL 64 IS 3 BP 898 EP 902 PG 5 WC Biophysics SC Biophysics GA KR826 UT WOS:A1993KR82600036 PM 19431878 ER PT J AU KARLE, IL FLIPPENANDERSON, JL UMA, K BALARAM, P AF KARLE, IL FLIPPENANDERSON, JL UMA, K BALARAM, P TI ACCOMMODATION OF A D-PHE RESIDUE INTO A RIGHT-HANDED 3(10)-HELIX - STRUCTURE OF BOC-D-PHE-(AIB)4-GLY-L-LEU-(AIB)2-OME, AN ANALOG OF THE AMINO TERMINAL SEGMENT OF ANTIAMEBINS AND EMERIMICINS SO BIOPOLYMERS LA English DT Article ID ALPHA-AMINOISOBUTYRIC-ACID; CRYSTAL-STRUCTURE; HELICAL PEPTIDE; STEREOCHEMISTRY; DECAPEPTIDES; ALAMETHICIN; AGGREGATION; PARALLEL; OME AB The crystal structure of the nonapeptide BOC-D-Phe-Aib-Aib-Aib-Aib-Gly-Leu-Aib-Aib-OMe (I), which is an analogue of the N-terminal sequence of antiamoebins and emerimicins, establishes a completely 3(10)-helical conformation with seven successive intramolecular 4 --> 1 hydrogen bonds. The average, phi,psi values for residues 1-8 are -59-degrees and -32-degrees, respectively. Crystal parameters are C47H77N9O12, space group P1, a = 10.636(4) angstrom, b = 11.239(4) angstrom, c = 12.227(6) angstrom, alpha = 101.17(4)degrees, beta = 97.22(4)degrees, gamma = 89.80(3)degrees, Z = 1, R = 5.95% for 3018 data with \F0\ > 3sigma(F), resolution 0.93 angstrom. The use of the torsion angle kappa = C(i - 1)N(i)C(alpha)(i)C(beta)(i), where kappa = 68-degrees for D-Phe and kappa = 164-degrees for L-Leu, confirms the opposite configurations of these residues. The phi,psi values of -62-degrees and -32-degrees at D-Phe are unusual, since this region is characteristic of residues with L configurations. Peptide I possesses only two chiral residues of opposing configuration. The observed right-handed 3(10)-helical structure suggests that helix sense has probably been determined by the stereochemical preferences of the Leu residue. C1 INDIAN INST SCI,MOLEC BIOPHYS UNIT,BANGALORE 560012,KARNATAKA,INDIA. RP KARLE, IL (reprint author), USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375, USA. FU NIGMS NIH HHS [GM-30902] NR 22 TC 9 Z9 9 U1 0 U2 0 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0006-3525 J9 BIOPOLYMERS JI Biopolymers PD MAR PY 1993 VL 33 IS 3 BP 401 EP 407 DI 10.1002/bip.360330308 PG 7 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA KR269 UT WOS:A1993KR26900007 PM 8461451 ER PT J AU SMITH, DR GEER, IW WEINBECK, RS SNOW, JT AF SMITH, DR GEER, IW WEINBECK, RS SNOW, JT TI AMS PROJECT ATMOSPHERE - 1992 WORKSHOP FOR TEACHERS SO BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY LA English DT Editorial Material ID INITIATIVES C1 AMER METEOROL SOC,WASHINGTON,DC. SUNY COLL BROCKPORT,DEPT EARTH SCI,BROCKPORT,NY 14420. PURDUE UNIV,DEPT EARTH & ATMOSPHER SCI,W LAFAYETTE,IN 47907. RP SMITH, DR (reprint author), USN ACAD,DEPT OCEANOG,ANNAPOLIS,MD 21402, USA. NR 4 TC 5 Z9 5 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0003-0007 J9 B AM METEOROL SOC JI Bull. Amer. Meteorol. Soc. PD MAR PY 1993 VL 74 IS 3 BP 421 EP 424 PG 4 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KU535 UT WOS:A1993KU53500007 ER PT J AU WALDRON, A AF WALDRON, A TI A POLICY CALCULATED TO BENEFIT CHINA - THE UNITED-STATES AND THE CHINA ARMS EMBARGO, 1919-1929. - VALONE,SJ SO BUSINESS HISTORY REVIEW LA English DT Book Review C1 BROWN UNIV,PROVIDENCE,RI 02912. RP WALDRON, A (reprint author), USN,WAR COLL,NEWPORT,RI 02840, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU BUSINESS HISTORY REVIEW PI BOSTON PA TEELE HALL 304 HARVARD BUS SCH PUBL SOLDIERS FIELD, BOSTON, MA 02163-0014 SN 0007-6805 J9 BUS HIST REV JI Bus. Hist. Rev. PD SPR PY 1993 VL 67 IS 1 BP 200 EP 201 DI 10.2307/3117498 PG 2 WC Business; History Of Social Sciences SC Business & Economics; Social Sciences - Other Topics GA MR621 UT WOS:A1993MR62100033 ER PT J AU NOBORI, T SZINAI, I AMOX, D PARKER, B OLOPADE, OI BUCHHAGEN, DL CARSON, DA AF NOBORI, T SZINAI, I AMOX, D PARKER, B OLOPADE, OI BUCHHAGEN, DL CARSON, DA TI METHYLTHIOADENOSINE PHOSPHORYLASE-DEFICIENCY IN HUMAN NONSMALL CELL LUNG CANCERS SO CANCER RESEARCH LA English DT Article ID L-METHIONINE; 5,10-DIDEAZATETRAHYDROFOLIC ACID; MAMMALIAN-CELLS; CULTURE; METABOLISM; 5'-METHYLTHIOADENOSINE; DEPRIVATION; GROWTH; LINES; TUMOR AB Methylthioadenosine (MeSAdo) phosphorylase, a purine metabolic enzyme, is present in all normal mammalian tissues. A deficiency of this enzyme has been reported in some human leukemias and lymphomas and in a few solid tumors. In the present study, a specific immunoassay was used to assess the enzyme levels in human non-small cell lung cancer cell lines and primary tumors. We also tested the effects of MeSAdo phosphorylase-selective chemotherapy on the in vitro growth of enzyme-positive and enzyme-negative lung cancer cell lines. Of 29 non-small cell lung cancers, 9 (6 cell lines and 3 primary tumors, 31%) lacked detectable immunoreactive enzyme protein. Both 5,10-dideazatetrahydrofolate, an inhibitor of de novo purine synthesis, and methionine depletion, combined with MeSAdo, prevented the growth of the enzyme-negative non-small cell lung cancer cells under conditions in which enzyme-positive cells utilized MeSAdo to endogenously synthesize purine nucleotides and methionine. Our data suggest that MeSAdo phosphorylase deficiency is frequently found in non-small cell lung cancers and can be exploited in designing enzyme-selective chemotherapy. C1 UNIV CALIF SAN DIEGO,SAM & ROSE STEIN INST RES AGING,LA JOLLA,CA 92093. UNIV CALIF SAN DIEGO,CTR CANC,LA JOLLA,CA 92093. UNIV CHICAGO,DEPT MED,HEMATOL ONCOL SECT,CHICAGO,IL 60637. USN,NCI,ONCOL BRANCH,BETHESDA,MD 20814. RP NOBORI, T (reprint author), UNIV CALIF SAN DIEGO,DEPT MED,LA JOLLA,CA 92093, USA. FU NCI NIH HHS [P30 CA23100]; NIAID NIH HHS [AI24466]; NIGMS NIH HHS [GM23200] NR 31 TC 45 Z9 46 U1 0 U2 1 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA PUBLIC LEDGER BLDG, SUITE 816, 150 S. INDEPENDENCE MALL W., PHILADELPHIA, PA 19106 SN 0008-5472 J9 CANCER RES JI Cancer Res. PD MAR 1 PY 1993 VL 53 IS 5 BP 1098 EP 1101 PG 4 WC Oncology SC Oncology GA KN706 UT WOS:A1993KN70600027 PM 8382555 ER PT J AU HENDERSON, DR AF HENDERSON, DR TI THE ECONOMICS OF PROHIBITION - THORNTON,M SO CATO JOURNAL LA English DT Book Review C1 HOOVER INST,WASHINGTON,DC. RP HENDERSON, DR (reprint author), USN,POSTGRAD SCH,WASHINGTON,DC 20350, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU CATO INSTITUTE PI WASHINGTON PA 1000 MASSACHUSETTS AVE., NW #6, WASHINGTON, DC 20001-5403 SN 0273-3072 J9 CATO J JI Cato J. PD SPR-SUM PY 1993 VL 13 IS 1 BP 152 EP 154 PG 3 WC Public Administration SC Public Administration GA QA961 UT WOS:A1993QA96100013 ER PT J AU BONE, WD AMUNDSON, DE AF BONE, WD AMUNDSON, DE TI AN UNUSUAL CASE OF SEVERE ANAPHYLAXIS DUE TO IPRATROPIUM BROMIDE INHALATION SO CHEST LA English DT Letter RP BONE, WD (reprint author), USN HOSP,SAN DIEGO,CA 92134, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU AMER COLL CHEST PHYSICIANS PI NORTHBROOK PA 3300 DUNDEE ROAD, NORTHBROOK, IL 60062-2348 SN 0012-3692 J9 CHEST JI Chest PD MAR PY 1993 VL 103 IS 3 BP 981 EP 982 PG 2 WC Critical Care Medicine; Respiratory System SC General & Internal Medicine; Respiratory System GA KQ382 UT WOS:A1993KQ38200083 PM 8449120 ER PT J AU OLDFIELD, EC RODIER, GR GRAY, GC AF OLDFIELD, EC RODIER, GR GRAY, GC TI THE ENDEMIC INFECTIOUS-DISEASES OF SOMALIA SO CLINICAL INFECTIOUS DISEASES LA English DT Review ID IMMUNODEFICIENCY-VIRUS HIV; OPERATION-DESERT-STORM; DENGUE VIRUS; HUMAN BRUCELLOSIS; HYDATID-DISEASE; PLASMID CHARACTERIZATION; PLASMODIUM-FALCIPARUM; NEISSERIA-GONORRHOEAE; MONOCLONAL-ANTIBODIES; ETHIOPIAN IMMIGRANTS RP OLDFIELD, EC (reprint author), USN HOSP,DEPT CLIN INVEST,SAN DIEGO,CA 92134, USA. NR 230 TC 17 Z9 18 U1 1 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 1058-4838 J9 CLIN INFECT DIS JI Clin. Infect. Dis. PD MAR PY 1993 VL 16 SU 3 BP S132 EP S157 PG 26 WC Immunology; Infectious Diseases; Microbiology SC Immunology; Infectious Diseases; Microbiology GA KN478 UT WOS:A1993KN47800002 PM 8443330 ER PT J AU SKINNER, HB AF SKINNER, HB TI PATHOKINESIOLOGY AND TOTAL JOINT ARTHROPLASTY SO CLINICAL ORTHOPAEDICS AND RELATED RESEARCH LA English DT Article ID TOTAL KNEE ARTHROPLASTY; QUANTITATIVE GAIT ANALYSIS; TOTAL HIP-REPLACEMENT; POSITION; WALKING AB Gait analysis data relating to total joint arthroplasty were reviewed to assess their impact on the evolution of prosthetic design. Although joint replacement designs have led to clinical improvement, they do not yet permit the restoration of normal gait. Normal function may be difficult to attain in patients with arthritic destruction, because of a proprioceptive defect. Arthroplasty improves gait by relieving pain, but other factors (previous gait patterns, prosthetic design, muscle weakness, balance, and proprioception) seem to prevent most patients from regaining normal gait. C1 USN,DEPT REHABIL RES & DEV,SAN FRANCISCO,CA 96263. RP SKINNER, HB (reprint author), UNIV CALIF SAN FRANCISCO,DEPT ORTHOPAED SURG,ROOM U-471,BOX 0728,SAN FRANCISCO,CA 94143, USA. NR 37 TC 38 Z9 38 U1 0 U2 1 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0009-921X J9 CLIN ORTHOP RELAT R JI Clin. Orthop. Rel. Res. PD MAR PY 1993 IS 288 BP 78 EP 86 PG 9 WC Orthopedics; Surgery SC Orthopedics; Surgery GA KW036 UT WOS:A1993KW03600010 PM 8458157 ER PT J AU JOHNSON, BE AF JOHNSON, BE TI MANAGEMENT OF SMALL-CELL LUNG-CANCER SO CLINICS IN CHEST MEDICINE LA English DT Article ID HIGH-DOSE CYCLOPHOSPHAMIDE; SOUTHWEST-ONCOLOGY-GROUP; INTENSIVE WEEKLY CHEMOTHERAPY; CROSS-RESISTANT CHEMOTHERAPY; MEDICAL-RESEARCH-COUNCIL; LONG-TERM SURVIVAL; PHASE-II TRIAL; COMBINATION CHEMOTHERAPY; RANDOMIZED TRIAL; BRONCHOGENIC-CARCINOMA RP JOHNSON, BE (reprint author), NATL NAVAL MED CTR, NCI,USN,MED ONCOL BRANCH,LUNG CANC BIOL SECT, BLDG 8, ROOM 5101, BETHESDA, MD 20889 USA. NR 120 TC 17 Z9 17 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0272-5231 J9 CLIN CHEST MED JI Clin. Chest Med. PD MAR PY 1993 VL 14 IS 1 BP 173 EP 187 PG 15 WC Respiratory System SC Respiratory System GA KT126 UT WOS:A1993KT12600015 PM 8384962 ER PT J AU ABDELHAMID, TK AF ABDELHAMID, TK TI ADAPTING, CORRECTING, AND PERFECTING SOFTWARE ESTIMATES - A MAINTENANCE METAPHOR SO COMPUTER LA English DT Article RP ABDELHAMID, TK (reprint author), NAVAL POSTGRAD SCH,DEPT ADM SCI,CODE AS-AH,MONTEREY,CA 93943, USA. NR 12 TC 4 Z9 4 U1 0 U2 2 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 0018-9162 J9 COMPUTER JI Computer PD MAR PY 1993 VL 26 IS 3 BP 20 EP 29 DI 10.1109/2.204681 PG 10 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA KR662 UT WOS:A1993KR66200004 ER PT J AU JASON, PK AF JASON, PK TI HOW DARE SHE, SCHAEFFER,SUSAN,FROMBERG 'BUFFALO AFTERNOON' AND THE ISSUE OF AUTHENTICITY SO CRITIQUE-STUDIES IN CONTEMPORARY FICTION LA English DT Article RP JASON, PK (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 19 TC 0 Z9 0 U1 0 U2 0 PU HELDREF PUBLICATIONS PI WASHINGTON PA 1319 EIGHTEENTH ST NW, WASHINGTON, DC 20036-1802 SN 0011-1619 J9 CRITIQUE-ST CONTEMP JI Crit.-Stud. Contemp. Fiction PD SPR PY 1993 VL 34 IS 3 BP 183 EP 192 PG 10 WC Literature SC Literature GA LF328 UT WOS:A1993LF32800005 ER PT J AU SOHN, SY THOMAS, GW AF SOHN, SY THOMAS, GW TI ESTIMATING THE GEOGRAPHIC EXTENT OF PART-TIME LABOR-MARKETS - UNITED-STATES-ARMY RESERVES SO DECISION SCIENCES LA English DT Article ID DISTANCE AB Local labor market supportability is becoming an increasingly important issue for the United States Army Reserves. As military bases close and Reserve units are consolidated at fewer Reserve centers, the appropriate reassignments of units to Reserve centers require accurate measures of the ability of local labor markets to support such consolidations. A two-stage random effect model is applied to evaluate the geographical extent of the labor market for Army Reserve centers. In the first stage model, a lognormal distribution is used to describe the commuting distance behavior of the Reserve center members. In the second stage model, we estimate the mean of log transformed commute distance as a function of regional characteristics of the Reserve center. An iterative weighted stepwise selection method is used to find a set of characteristics that adequately predict variation of the mean commute distance over Reserve centers. The resulting model is used as inputs to location and market assessment models to assist the marketing decisions of the Army Recruiting Command. C1 USN,POSTGRAD SCH,DEPT ADM SCI,MONTEREY,CA 93943. RP SOHN, SY (reprint author), USN,POSTGRAD SCH,DEPT OPERAT RES,MONTEREY,CA 93943, USA. NR 13 TC 0 Z9 0 U1 0 U2 2 PU DECISION SCIENCES INST, GEORGIA STATE UNIV PI ATLANTA PA COLLEGE OF BUSINESS ADMN, UNIVERSITY PLAZA, ATLANTA, GA 30303 SN 0011-7315 J9 DECISION SCI JI Decis. Sci. PD MAR-APR PY 1993 VL 24 IS 2 BP 479 EP 492 DI 10.1111/j.1540-5915.1993.tb00484.x PG 14 WC Management SC Business & Economics GA LC918 UT WOS:A1993LC91800012 ER PT J AU WU, C AF WU, C TI COOLING CAPACITY OPTIMIZATION OF A WASTE HEAT ABSORPTION REFRIGERATION CYCLE SO HEAT RECOVERY SYSTEMS & CHP LA English DT Article AB A finite-time endoreversible heat-driven absorption refrigerator is modeled thermodynamically in this paper. The refrigerator uses low-temperature waste heat directly to provide a cooling effect. The maximum cooling capacity delivered by the absorption system is analyzed. RP WU, C (reprint author), USN ACAD,DEPT MECH ENGN,ANNAPOLIS,MD 21402, USA. NR 0 TC 20 Z9 20 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0890-4332 J9 HEAT RECOV SYST CHP JI Heat Recovery Syst. CHP PD MAR PY 1993 VL 13 IS 2 BP 161 EP 166 DI 10.1016/0890-4332(93)90035-T PG 6 WC Thermodynamics; Energy & Fuels; Engineering, Mechanical; Mechanics SC Thermodynamics; Energy & Fuels; Engineering; Mechanics GA KR307 UT WOS:A1993KR30700007 ER PT J AU Carroll, KR Pond, JM Cukauskas, EJ AF Carroll, Kenneth R. Pond, Jeffrey M. Cukauskas, Edward J. TI Superconducting Kinetic-Inductance Microwave Filters SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB Several kinetic-inductance microstrip filters have been designed and tested. The microstrip consists of a superconducting niobium carbon nitride (NbCN) strip separated from a NbCN ground plane by an amorphous hydrogenated-silicon dielectric. The circuits investigated include an interferometer, a stepped-impedance, a low-frequency stub, and a high-frequency stub filter. Generally, for frequencies below 20 GHz, good transmission characteristics were measured for these structures. A simple physical model is used to determine the major features of the transmission characteristics over a wide temperature and frequency range. Other important issues such as the superconductor and dielectric losses, impedance matching, and film uniformity are addressed for these structures. C1 [Carroll, Kenneth R.; Pond, Jeffrey M.; Cukauskas, Edward J.] Naval Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA. RP Carroll, KR (reprint author), Naval Res Lab, Div Elect Sci & Technol, Washington, DC 20375 USA. FU Office of Naval Technology FX This work was supported by the Office of Naval Technology. One of the authors (KRC) held a Naval Research Laboratory/National Research Council research associateship during the course of this work. NR 14 TC 5 Z9 5 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 8 EP 16 DI 10.1109/77.233664 PN 1 PG 10 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TF UT WOS:000209703000002 ER PT J AU Soulen, RJ AF Soulen, R. J., Jr. TI POSSIBLE EXPLANATION FOR THE SHAPE OF I-V CURVES OF SUPERCONDUCTORS AND A MORE MEANINGFUL DEFINITION OF I-C SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB I have applied a flux creep model to calculate the shape of the I-V characteristic of a superconductor. The functional form mimics an empirical equation, V similar to I-n, frequently used to fit data and thus offers a physical justification for its application. The magnetic field dependence of the exponent n is also predicted and compared with experiments. The fits so obtained are encouraging, but call for some experiments specifically designed to test all of the ramifications of the proposed model. C1 [Soulen, R. J., Jr.] US Navy, Res Lab, Washington, DC 20375 USA. RP Soulen, RJ (reprint author), US Navy, Res Lab, Washington, DC 20375 USA. NR 11 TC 8 Z9 8 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1261 EP 1264 DI 10.1109/77.233395 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TH UT WOS:000209703200090 ER PT J AU Claassen, JH Broussard, PR Cestone, VC Hu, R AF Claassen, J. H. Broussard, P. R. Cestone, V. C. Hu, Roger TI A STUDY OF THE PROXIMITY EFFECT AT OXIDE SUPERCONDUCTOR-NORMAL METAL INTERFACES SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB A novel kinetic inductance technique has been used to screen several samples of oxide superconductor/noble metal thin film bilayers for a signature of the proximity effect in the noble metal. To date no evidence of significant induction of a superconducting pair potential in the normal metal has been observed. C1 [Claassen, J. H.; Broussard, P. R.; Cestone, V. C.] US Navy, Res Lab, Washington, DC 20375 USA. [Hu, Roger] TRW, Redondo Beach, CA 90278 USA. RP Claassen, JH (reprint author), US Navy, Res Lab, Washington, DC 20375 USA. NR 8 TC 2 Z9 2 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1277 EP 1279 DI 10.1109/77.233391 PN 3 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TH UT WOS:000209703200094 ER PT J AU Roesler, G Tedrow, PM Hellman, ES Hartford, EH AF Roesler, Gordon Tedrow, Paul M. Hellman, E. S. Hartford, E. H. TI PAULI-LIMITED CRITICAL FIELD OF Ba1-xKxBiO3 DETERMINED FROM QUASIPARTICLE TUNNELING SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB A planar tunnel diode with Ba1-xKxBiO3 (BKBO) and Ag electrodes were fabricated. The dynamic conductance of the junction was similar to that found with conventional BCS superconductors. Using weak coupling theory, the undepaired transition temperature, spin-orbit scattering rate, and diffusion constant of BKBO were determined. The Pauli-limited critical field was calculated, and compared to the measured resistive transitions of the BKBO film in magnetic fields. The Pauli-limited field is observed to occur generally at the field where the normal-state resistance is restored. C1 [Roesler, Gordon; Tedrow, Paul M.] MIT, Francis Bitter Natl Magnet Lab, Cambridge, MA 02139 USA. [Hellman, E. S.; Hartford, E. H.] AT&T Bell Labs, Murray Hill, NJ 07974 USA. RP Roesler, G (reprint author), US Navy, Res Lab, Code 6340, Washington, DC 20375 USA. FU AFOSR; Consortium for Superconducting Electronics; National Science Foundation FX This research was supported by AFOSR and the Consortium for Superconducting Electronics.; Supported by AFOSR. Current address: Naval Research Laboratory Code 6340, Washington, DC 20375-5000.; Supported at MIT by the National Science Foundation. NR 4 TC 7 Z9 7 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1280 EP 1282 DI 10.1109/77.233390 PN 3 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TH UT WOS:000209703200095 ER PT J AU Pond, JM Carroll, KR Horwitz, JS Chrisey, DB AF Pond, J. M. Carroll, K. R. Horwitz, J. S. Chrisey, D. B. TI YBa2Cu3O7-delta/LaAlO3/YBa2Cu3O7-delta TRILAYER TRANSMISSION LINES FOR MEASURING THE SUPERCONDUCTING PENETRATION DEPTH SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB Microstrip transmission lines fabricated from two YBa2Cu3O7-delta films separated by a deposited LaAlO3 dielectric film provide a technique for measuring the penetration depth. When weakly coupled to a microwave signal, this structure permits precise measurements of the resonant frequencies. The absolute value of the penetration depth as a function of temperature can be calculated from the phase velocity. With this method, there is no need to assume a particular functional form for the temperature dependence. The sensitivities of this method to possible asymmetries in the superconducting film properties and uncertainties in the dielectric constant have also been analyzed. Recently reported microwave measurements will be analyzed. C1 [Pond, J. M.; Carroll, K. R.; Horwitz, J. S.; Chrisey, D. B.] Naval Res Lab, Washington, DC 20375 USA. RP Pond, JM (reprint author), Naval Res Lab, Washington, DC 20375 USA. FU National Research Council/Naval Research Laboratory Fellowship; Office of Naval Technology, DARPA; Space and Naval Warfare Systems Command through the High Temperature Superconductivity Space Experiment program FX The authors would like to thank Drs. Martin Nisenoff, Christen Rauscher, and Denis Webb for their insights, comments and encouragement, and Mr. Hubert Heddings for skillful assembly of devices. One of the authors (KRC) held a National Research Council/Naval Research Laboratory Fellowship during the course of this work. The work was sponsored, in part, by the Office of Naval Technology, DARPA, and the Space and Naval Warfare Systems Command through the High Temperature Superconductivity Space Experiment program whose support are gratefully acknowledged. NR 5 TC 4 Z9 4 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1438 EP 1441 DI 10.1109/77.233626 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TH UT WOS:000209703200137 ER PT J AU Broussard, PR Cestone, VC Allen, LH Wolf, SA AF Broussard, P. R. Cestone, V. C. Allen, L. H. Wolf, S. A. TI CHARACTERIZATION OF THIN FILM COMPOSITE MIXTURES OF Y1Ba2Cu3O7-y AND Y2Ba1Cu1O5 SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB We have prepared thin film samples composed of Y1Ba2Cu3O7-y ("123") and Y2Ba1Cu1O5 ("211") by off-axis sputtering from separate targets of the "123" and "211" material. X-ray diffraction on the films shows the presence of c-axis oriented "123", but no indication of ordered "211" lines. The c-axis lattice constant does not show any change compared to our pure "123" films. As the volume percentage of "211" material increases, we see a reduction in T-C and J(C), and an increase in the resistivity. The temperature and field dependence of the critical current are different for our composites compared to our pure "123" films. C1 [Broussard, P. R.; Cestone, V. C.; Allen, L. H.; Wolf, S. A.] Naval Res Lab, Washington, DC 20375 USA. RP Broussard, PR (reprint author), Naval Res Lab, Washington, DC 20375 USA. NR 13 TC 0 Z9 0 U1 1 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1472 EP 1475 DI 10.1109/77.233617 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TH UT WOS:000209703200146 ER PT J AU Francavilla, TL Miller, MM Soulen, RJ Selvamanickam, V Salama, K AF Francavilla, T. L. Miller, M. M. Soulen, R. J., Jr. Selvamanickam, V. Salama, K. TI THE ANGULAR DEPENDENCE OF THE CRITICAL CURRENT DENSITY OF TEXTURED YBaCuO SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB Highly-textured, bulk YBaCuO samples consisting of dense highly oriented platelets were prepared by a liquid phase process. Critical current density measurements at 77 K and at 6 T were made as the angle between the transport current and the externally applied magnetic field was varied in the ab-plane. At all times, the c-axis was perpendicular to both the dc transport current and the external magnetic field. The critical current density values were found to achieve a maximum of 7000 A/cm(2) when the magnetic field was parallel to the transport current and minimum of 2000 A/cm(2) when the magnetic field was close to an orientation perpendicular to the transport current with one notable exception. A small increase to approximately 3000 A/cm(2) from the minimum value of 2000 A/cm(2) was observed when the magnetic field was perpendicular to the transport current. Ignoring this exception, the angular variation of critical current density is qualitatively consistent with the variation expected from the Lorentz force acting upon the vortices. C1 [Francavilla, T. L.; Miller, M. M.; Soulen, R. J., Jr.] Naval Res Lab, 4555 Overlook Ave, Washington, DC 20375 USA. [Selvamanickam, V.; Salama, K.] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA. RP Francavilla, TL (reprint author), Naval Res Lab, 4555 Overlook Ave, Washington, DC 20375 USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1487 EP 1490 DI 10.1109/77.233613 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TH UT WOS:000209703200150 ER PT J AU Cukauskas, EJ Sherrill, GK Allen, LH Holm, RT AF Cukauskas, E. J. Sherrill, G. K. Allen, L. H. Holm, R. T. TI THE EFFECTS OF ADDED GASES IN THE SPUTTER DEPOSITION OF YBa2Cu3O7 THIN FILMS SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB YBa2Cu3O7 thin films have been deposited on MgO substrates by off-axis magnetron sputtering in argon, oxygen, and an additional gas. Additions of nitrogen, hydrogen, methane, air, and water vapor in amounts of up to 25% were used in this investigation. Each gas stabilized the target voltage and growth rate for the duration of the deposition. Growth rates improved by over 50% with as little as 3% hydrogen. When used with a target which had degraded after more than 150 hours use, the added gas improved T-C and J(C) beyond levels attained from the new target. T-c increased from 82 K without hydrogen to 89 K with hydrogen and J(C)(12K) from 3x10(4) to >7x10(6) A/cm(2). Nitrogen yielded less dramatic effects. We attribute these improvements to the catalytic effect of these gases in maintaining elevated levels of atomic oxygen during film growth. C1 [Cukauskas, E. J.; Sherrill, G. K.; Allen, L. H.; Holm, R. T.] Naval Res Lab, Washington, DC 20375 USA. RP Cukauskas, EJ (reprint author), Naval Res Lab, Washington, DC 20375 USA. FU Office of Naval Research; Office of Naval Technology; National Research Council FX This research was supported in part by the Office of Naval Research and the Office of Naval Technology. One of us (G.K.S.) thanks the National Research Council for support as a NRC-NRL postdoctoral associate. NR 9 TC 3 Z9 3 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1520 EP 1523 DI 10.1109/77.233378 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TH UT WOS:000209703200157 ER PT J AU Chrisey, DB Horwitz, JS Pond, JM Carrol, KR Lubitz, P Grabowski, KS Leuchtner, RE Carosella, CA Vittoria, CV AF Chrisey, D. B. Horwitz, J. S. Pond, J. M. Carrol, K. R. Lubitz, P. Grabowski, K. S. Leuchtner, R. E. Carosella, C. A. Vittoria, C. V. TI PULSED LASER DEPOSITION OF NOVEL HTS MULTILAYERS FOR PASSIVE AND ACTIVE DEVICE APPLICATIONS SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB Multilayered structures have been fabricated from binary combinations of the high T-c superconductor YBa2Cu3O7-delta (YBCO) and the ferrite BaFe12O19 (BFO) or the ferroelectric Sr0.5Ba0.5TiO3 (SBT). The combination of YBCO and BFO was found to destroy the superconductivity of the YBCO layer. Vibrating sample magnetometer measurements of the BFO layer still indicated a large uniaxial anisotropy The underlying YBCO layer, of an SBT/YBCO bilayer still had high quality transport properties unaffected by the SBT layer (T-C similar to 91 K, J(c)(77 K) similar to 2x10(6) A/cm(2)). A thin film, normal metal/SBT transmission line, patterned in microstrip, demonstrated a wealth of temperature and electric field dependent dielectric information for the frequency range tested (f <= 3 GHz). At 100 K, the dielectric constant for zero applied field was 250 for frequencies less than 30 MHz; it was similar to 120 for 1 GHz <= f <= 3 GHz, and it varied continuously with frequency between these values. For temperatures between 300 K and 11 K, frequencies less than about 0.5 GHz, and applied fields up to 200 kV/cm, a nearly linear change in field-induced phase difference was produced in the transmission line. Above this frequency the field dependence changed sign and essentially disappeared at similar to 1 GHz. C1 [Chrisey, D. B.; Horwitz, J. S.; Pond, J. M.; Carrol, K. R.; Lubitz, P.; Grabowski, K. S.; Leuchtner, R. E.; Carosella, C. A.] Naval Res Lab, Washington, DC 20375 USA. [Vittoria, C. V.] Northeastern Univ, Boston, MA 02115 USA. RP Chrisey, DB (reprint author), Naval Res Lab, Washington, DC 20375 USA. OI Grabowski, Kenneth/0000-0003-0816-001X NR 9 TC 3 Z9 3 U1 1 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1528 EP 1531 DI 10.1109/77.233376 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TH UT WOS:000209703200159 ER PT J AU Sherrill, GK Cukauskas, EJ Allen, LH AF Sherrill, G. K. Cukauskas, E. J. Allen, L. H. TI ELECTRON TRANSPORT AND MAGNETIC PENETRATION DEPTH IN NIOBIUM-SILICON MULTILAYERS SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB Thin niobium-silicon multilayers have been sputtered with niobium thicknesses less than the coherence length and silicon thicknesses which allow for tunneling between layers. The multilayer structure has been confirmed by X-ray diffraction, and the films have been electrically characterized with respect to T-c and J(c). For constant Nb thickness, both T-c and J(c) increase with decreasing Si thickness, indicating increased coupling between the Nb layers. When a multilayer forms the barrier in a tunnel structure, the resulting I(V) characteristic resembles that for a series of single-barrier junctions, and further evidence of Nb interlayer coupling is observed. These multilayers have also been incorporated as the base in several tunnel structures in order to measure the multilayer penetration depth via the magnetic field dependence of I-c. Preliminary results indicate that the theoretically predicted enhancement of penetration depth in a multilayer does occur. C1 [Sherrill, G. K.; Cukauskas, E. J.; Allen, L. H.] Naval Res Lab, Washington, DC 20375 USA. RP Sherrill, GK (reprint author), Naval Res Lab, Washington, DC 20375 USA. FU Office of Naval Research; Office of Naval Technology; National Research Council FX This work was sponsored in part by the Office of Naval Research and the Office of Naval Technology. The authors are grateful to Phil Broussard and Ron Holm for aid in the Xray analysis. One of us (G.K.S.) thanks the National Research Council for support as a NRC-NRL postdoctoral associate. NR 21 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1612 EP 1615 DI 10.1109/77.233902 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TH UT WOS:000209703200182 ER PT J AU Allen, LH Sherrill, GK Holm, RT Cukauskas, EJ AF Allen, L. H. Sherrill, G. K. Holm, R. T. Cukauskas, E. J. TI PROPERTIES OF MULTILAYER FILMS OF Y1Ba2Cu3O7-x AND COMPOSITES OF Y1Ba2Cu3O7-x/LaAlO3 SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB We have grown multilayer films of Y1Ba2Cu3O7-x with composites of Y1Ba2Cu3O7-x and LaAlO3 on (100) LaAlO3 substrates by co-sputtering. We have measured inductive and resistive T-C's for multilayers with various amounts of LaAlO3 in the composite layers and for multilayers with different composite layer thicknesses. T-C's generally drop as the amount of LaAlO3 in the composite layer increases or the thickness of the composite layer increases. J(C)'s of these films have values below those for single layer composite films grown on MgO substrates, but this can be accounted for by the introduction of grain boundaries into the films from substrate twinning. Initial photoresponse measurements were also made and have magnitudes comparable to the single layer YBCO/LAO composite films. C1 [Allen, L. H.; Sherrill, G. K.; Holm, R. T.; Cukauskas, E. J.] Naval Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA. RP Allen, LH (reprint author), Naval Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA. FU Office of Naval Research; National Research Council FX Funding for this study was provided by the Office of Naval Research. One of us (GKS) was supported by the National Research Council through a NRC/NRL post-doctoral fellowship. NR 11 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1616 EP 1619 DI 10.1109/77.233903 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TH UT WOS:000209703200183 ER PT J AU Newman, HS DeSisto, WJ AF Newman, Harvey S. DeSisto, William J. TI MICROWAVE PROPERTIES OF DOUBLE-SIDED YBa2Cu3O7-delta THIN FILMS DEPOSITED BY METALORGANIC CHEMICAL VAPOR DEPOSITION SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB High-quality thin films of YBa2Cu3O7-delta have been deposited by metalorganic chemical vapor deposition on both sides of 15 mm x 15 mm < 100 > LaAlO3 substrates, without requiring the use of heat sinking compounds. Typical transport data exhibited T-c's > 87 K, transition widths < 1 degrees K and J(c)'s > 10(6) A/cm(2) (measured inductively at 77 K, 0 T). Microwave surface resistance measurements (36A GHz) at temperatures between 20 K and 100 K, made using a copper cavity end-wall-replacement technique, showed a sharp drop through the transition temperature and yielded values at 77 K that were better than a 20X improvement over copper metal when scaled to 10 GHz. Double-sided coatings have been obtained by sequentially depositing each side of the substrate. Contamination of the backside during growth of the first-side film and of the first-side film during growth of the second-side film has been avoided by coating the susceptor with gold. C1 [Newman, Harvey S.; DeSisto, William J.] Naval Res Lab, Elect Sci & Technol Div, Washington, DC 20375 USA. RP Newman, HS (reprint author), Naval Res Lab, Elect Sci & Technol Div, Washington, DC 20375 USA. FU Office of Naval Research; Office of Naval Technology; Strategic Defense Initiative Office FX Support from the Office of Naval Research, the Office of Naval Technology, and the Strategic Defense Initiative Office is gratefully acknowledged. NR 9 TC 5 Z9 5 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1709 EP 1710 DI 10.1109/77.233607 PN 3 PG 2 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TH UT WOS:000209703200206 ER PT J AU Pond, JM Carroll, KR Chrisey, DB Horwitz, JS Cestone, VC AF Pond, J. M. Carroll, K. R. Chrisey, D. B. Horwitz, J. S. Cestone, V. C. TI A NOVEL MICROSTRIP-COMPATIBLE TECHNIQUE FOR DEPOSITING YBa2Cu3O7-delta ON BOTH SURFACES OF A SUBSTRATE SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB A novel technique for the deposition of YBa2Cu3O7-delta on both the top and bottom surface of a substrate by pulsed laser deposition is reported. This approach employs a metallic buffer layer to protect the first YBa2Cu3O7-delta film while the second film is deposited. It is particularly applicable to microstrip-based circuit topologies where the ground plane 'conductor' requires minimal patterning. The performance of microstrip ring resonators, fabricated by this technique, is substantially better than can be achieved with microstrip ring resonators which consist of a superconducting ring and a normal-conductor ground plane. This approach allows the deposition of YBa2Cu3O7-delta on both sides of the substrate without the need for radiative heating schemes and can accommodate any size and shape of substrate. C1 [Pond, J. M.; Carroll, K. R.; Chrisey, D. B.; Horwitz, J. S.; Cestone, V. C.] Naval Res Lab, Washington, DC 20375 USA. RP Pond, JM (reprint author), Naval Res Lab, Washington, DC 20375 USA. FU National Research Council/Naval Research Laboratory Fellowship; Space and Naval Warfare Systems Command through the High Temperature Superconductivity Space Experiment program FX The authors wish thank Drs. M. Nisenoff, C. Rauscher, and D. Webb for their insights, comments and encouragement, Mr. R. Neidert for assistance in modeling the conductor losses, and Mr. H. Heddings for skillful assembly of the circuits. One of the authors (KRC) held a National Research Council/Naval Research Laboratory Fellowship during the course of this work. The work was sponsored, in part, by the Space and Naval Warfare Systems Command through the High Temperature Superconductivity Space Experiment program whose support is gratefully acknowledged. NR 6 TC 6 Z9 6 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1711 EP 1714 DI 10.1109/77.233606 PN 3 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TH UT WOS:000209703200207 ER PT J AU Gershcnson, M McDonald, RJ AF Gershcnson, Meir McDonald, Robert J. TI HIGH SLEW RATE "CHANNEL EQUALIZED" DC SQUID FLUX-LOCKED LOOP: CONCEPT AND SIMULATION SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB The concept of improving conventional DC SQUID flux-locked loop (FLL) performance by applying a "channel equalization" circuit after the pre-amp, but to prior the demodulation process, in order to compensate for bandwidth limitations imposed by conventional DC SQUID impedance matching networks is discussed. Using an analog circuit simulator the various subcircuits of the FLL are modelled and a comparison between a conventional and equalized FLL is performed. Computer simulations for the open and closed loop cases are used to quantify the increase in slew rate for the equalized FLL system. C1 [Gershcnson, Meir; McDonald, Robert J.] Naval Surface Warfare Ctr, Coastal Syst Stn, Dahlgren Div, Code 1130, Panama City, FL 32408 USA. RP Gershcnson, M (reprint author), Naval Surface Warfare Ctr, Coastal Syst Stn, Dahlgren Div, Code 1130, Panama City, FL 32408 USA. NR 14 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1832 EP 1836 DI 10.1109/77.233325 PN 4 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TI UT WOS:000209703300010 ER PT J AU Clem, TR Purpura, JW Wiegert, RF Goodman, WL AF Clem, T. R. Purpura, J. W. Wiegert, R. F. Goodman, W. L. TI NONLINEAR RESPONSE OF LOW TEMPERATURE SUPERCONDUCTING THIN FILM GRADIOMETER SENSE LOOPS SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB Experimental procedures have been developed and experiments have been conducted to measure the nonlinear response of superconducting thin film gradiometer sense loops to changes in magnetic field at 4.2K. The sense loops were fabricated from niobium and niobium nitride. The basic experiment involved the ramp of a uniform magnetic field from zero up to a predetermined value. The performance of the loops was measured by means of a SQUID-based readout system inductively coupled to the samples. Details of the experimental apparatus and the experimental procedure are described. In this study, threshold values of external field were observed to characterize the onset of nonlinear behavior for all samples measured. The performance of the loops as measured by this onset of nonlinearity is correlated with important parameters including material, aspect ratio, edge quality, and the effect of crossovers. The empirical results are compared with predictions from an Went diamagnet model to describe demagnetization effects. C1 [Clem, T. R.; Purpura, J. W.; Wiegert, R. F.] Naval Surface Warfare Ctr, Coastal Syst Stn, Dahlgren Div, Panama City, FL 32407 USA. [Goodman, W. L.] 2G Enterprises, 897 Independence Ave, Mountain View, CA 94043 USA. RP Clem, TR (reprint author), Naval Surface Warfare Ctr, Coastal Syst Stn, Dahlgren Div, Panama City, FL 32407 USA. NR 11 TC 4 Z9 4 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1848 EP 1852 DI 10.1109/77.233321 PN 4 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TI UT WOS:000209703300014 ER PT J AU Mignogna, RB Browning, V Gubser, DU Schechter, RS Simmonds, KE Weinstock, H AF Mignogna, R. B. Browning, V. Gubser, D. U. Schechter, R. S. Simmonds, K. E. Weinstock, H. TI PASSIVE NONDESTRUCTIVE EVALUATION OF FERROMAGNETIC MATERIALS DURING DEFORMATION USING SQUID GRADIOMETERS SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB An experimental system is described for in situ passive measurement of changes in the magnetic field of ferromagnetic materials subject to tensile deformation. Changes in magnetic field during deformation are monitored using a three axes first order SQUID gradiometer. The gradiometer is held in a fixed position while a horizontal load frame is scanned in two dimensions. The horizontal load frame has been constructed from non-ferromagnetic materials. Results are presented for cold-rolled steel specimens. C1 [Mignogna, R. B.; Browning, V.; Gubser, D. U.; Schechter, R. S.; Simmonds, K. E.] Naval Res Lab, Mat Sci & Technol Div, Washington, DC 20375 USA. [Weinstock, H.] Air Force Off Sci Res, Washington, DC 20332 USA. RP Mignogna, RB (reprint author), Naval Res Lab, Mat Sci & Technol Div, Washington, DC 20375 USA. NR 3 TC 12 Z9 13 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 1922 EP 1925 DI 10.1109/77.233585 PN 4 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TI UT WOS:000209703300032 ER PT J AU Purpura, JW Clem, TR Wiegert, RF AF Purpura, J. W. Clem, T. R. Wiegert, R. F. TI NONLINEAR RESPONSE IN THIN FILM HIGH TEMPERATURE SUPERCONDUCTING MAGNETOMETER SENSE LOOPS SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB Measurements of nonlinear response in Tl2CaBa2Cu2O8+y and YBa2Cu3O7-x. thin film magnetometer sense loops were performed at 4.2 K. The thallium-based films were deposited by laser ablation onto lanthanum aluminate substrates and the yttrium-based films were prepared by sputtering onto strontium titanate substrates. Both types of superconducting films were patterned using photolithography into sense loops, each consisting of a magnetometer input loop connected to a magnetometer output loop by a pair of closely spaced parallel strip lines. The thin film output loop of a given sample was coupled inductively to a sensitive measurement system employing a superconducting quantum interference device to measure magnetic flux. A uniform dc magnetic field applied to the sample input loop was slowly ramped to plus and minus a predetermined value and then ramped back to zero. The sample output was monitored to determine the value of applied field corresponding to the threshold of nonlinear response of the film loop. Film loops having various thicknesses and line widths were studied to correlate aspect ratio to nonlinear effects. Possible mechanisms for the observed nonlinear behavior are discussed. C1 [Purpura, J. W.; Clem, T. R.; Wiegert, R. F.] Naval Surface Warfare Ctr, Coastal Syst Stn, Dahlgren Div, Panama City, FL 32407 USA. RP Purpura, JW (reprint author), Naval Surface Warfare Ctr, Coastal Syst Stn, Dahlgren Div, Panama City, FL 32407 USA. NR 7 TC 3 Z9 3 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 2445 EP 2449 DI 10.1109/77.233950 PN 4 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TI UT WOS:000209703300158 ER PT J AU Carroll, KR Pond, JM Cukauskas, EJ AF Carroll, K. R. Pond, J. M. Cukauskas, E. J. TI MICROWAVE LOSSES IN KINETIC-INDUCTANCE DEVICES FABRICA lED FROM NbCN/MgO/NbCN TRILAYERS SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB The microwave losses in kinetic-inductance devices fabricated from niobium carbon nitride/magnesium oxide/niobium carbon nitride (NbCN/MgO/NbCN) trilayers are being investigated. For microwave applications, these devices are attractive because of the substantial reduction in size over conventional superconductor architectures while maintaining low dispersion, wide bandwidth, and acceptable superconductor losses. Except for temperatures very near the critical temperature, the performance of these devices is presently limited to quality factors between 100-500 by losses in the dielectric. While this level of loss is acceptable for some applications, reduction in the dielectric loss is needed. For this study, MgO was chosen since this material can grow epitaxially on NbCN and is consequently expected to have loss tangents closer to those of bulk crystals. In addition to the dielectric losses, the superconductor losses and other film and device parameters will be reported. C1 [Carroll, K. R.; Pond, J. M.; Cukauskas, E. J.] Naval Res Lab, Washington, DC 20375 USA. RP Carroll, KR (reprint author), Naval Res Lab, Washington, DC 20375 USA. FU Office of Naval Technology; National Research Council - Naval Research Laboratory Fellowship FX The authors would like to thank Dr. John Talvacchio for useful discussions concerning, the deposition of MgO. This work was supported in part by the Office of Naval Technology. One of the authors (KRC) held a National Research Council - Naval Research Laboratory Fellowship. during the course of this work. NR 9 TC 4 Z9 4 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 2808 EP 2811 DI 10.1109/77.233498 PN 4 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TI UT WOS:000209703300244 ER PT J AU Nisenoff, M Ritter, JC Price, G Wolf, SA AF Nisenoff, M. Ritter, J. C. Price, G. Wolf, S. A. TI THE HIGH TEMPERATURE SUPERCONDUCTIVITY SPACE EXPERIMENT: HTSSE I - COMPONENTS AND HTSSE II - SUBSYSTEMS AND ADVANCED DEVICES SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY LA English DT Article AB One of the first applications of high temperature superconductivity will be in high performance microwave and millimeter wave component technology, especially in satellite communications systems. To speed the development of this technology and its introduction into spacecraft systems, the Naval Research Laboratory (NRL) established a program to show the feasibility of deploying high temperature superconducting electronic devices and components in space. This program is known as the High Temperature Superconductivity Space Experiment (HTSSE). This program will prove that HTS technology is sufficiently robust to survive the space environment and that it has the potential to significantly improve space communications systems. The devices for the initial launch (HTSSE-I) have been delivered to NRL, their electrical characteristics verified and their packages space qualified. These devices will be integrated with a cryogenic refrigeration system and a data acquisition system, all space qualified. Once placed in earth orbit, the experimental package will be cooled to cryogenic temperatures and the characteristics of the HTS devices monitored periodically. The HTSSE-I mission, scheduled to start in 1993, will last for at least six months. The goals and objectives of the HTSSE program will be described and a description of the first launch package and plans for future experiments (HTSSE-II) will be outlined. C1 [Nisenoff, M.; Ritter, J. C.; Price, G.; Wolf, S. A.] Naval Res Lab, Washington, DC 20375 USA. RP Nisenoff, M (reprint author), Naval Res Lab, Washington, DC 20375 USA. FU Space and Naval Warfare Systems Command of the U.S. Navy; US government; National Aeronautical and Space Administration (NASA) FX The High Temperature Superconductivity Space Experiment is managed by the Naval Research Laboratory and funded by the Space and Naval Warfare Systems Command of the U.S. Navy. The support of other US government agencies which partially funded related research and development work at some of the HTSSE contractors is also acknowledged. The devices provided by the NASA Jet Propulsion Laboratory and the NASA Lewis Research Center were funded by National Aeronautical and Space Administration (NASA) while the devices from the University of Wuppertal (FRG), were provided at no cost to the HTSSE program. NR 3 TC 17 Z9 17 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1051-8223 EI 1558-2515 J9 IEEE T APPL SUPERCON JI IEEE Trans. Appl. Supercond. PD MAR PY 1993 VL 3 IS 1 BP 2885 EP 2890 DI 10.1109/77.234003 PN 4 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA V43TI UT WOS:000209703300262 ER PT J AU LUNDY, GM MILLER, RE AF LUNDY, GM MILLER, RE TI ANALYZING A CSMA CD PROTOCOL THROUGH A SYSTEMS OF COMMUNICATING MACHINES SPECIFICATION SO IEEE TRANSACTIONS ON COMMUNICATIONS LA English DT Article AB A model for the specification and analysis of communication protocols called Systems of Communicating Machines is used to specify a CSMA/CD protocol, and to analyze it for safety and certain restricted liveness properties. The model uses a combination of finite state machines and variables in the specification of each machine, and the communication between machines is accomplished through shared variables. The ethernet bus is modeled as a single variable shared by all communicating processes. Collisions are modeled by simultaneous writes to this variable. C1 UNIV MARYLAND,DEPT COMP SCI,COLL PK,MD 20742. NASA,GODDARD SPACE FLIGHT CTR,CTR EXCELLENCE SPACE DATA & INFORMAT SCI,GREENBELT,MD 20771. RP LUNDY, GM (reprint author), USN,SCH POSTGRAD,DEPT COMP SCI,MONTEREY,CA 93943, USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0090-6778 J9 IEEE T COMMUN JI IEEE Trans. Commun. PD MAR PY 1993 VL 41 IS 3 BP 447 EP 449 DI 10.1109/26.221072 PG 3 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA LL458 UT WOS:A1993LL45800006 ER PT J AU LEE, HM HAN, YY AF LEE, HM HAN, YY TI M-LAYER - NPS VERSION SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 5TH BIENNIAL IEEE CONF ON ELECTROMAGNETIC FIELD COMPUTATION ( IEEE-CEFC ) CY AUG 03-05, 1992 CL HARVEY MUDD COLL, CLAREMONT, CA SP IEEE, MAGNET SOC, HARVEY MUDD COLL HO HARVEY MUDD COLL AB The M-Layer program developed by NOSC has been substantially revised into a Naval Postgraduate School (NPS) version. The mode locating algorithm was re-written to take advantage of local analyticity of the mode function. The exponential complex number representation was adopted to simplify multiplication and to improve accuracy when adding two complex numbers which nearly cancel each other. A consistency condition was formulated to assure accurate and efficient evaluation of the height-pin function. As a result, this NPS version executes faster with greater stability. RP LEE, HM (reprint author), USN,POSTGRAD SCH,DEPT ELECT & COMP ENGN,MONTEREY,CA 93943, USA. NR 10 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD MAR PY 1993 VL 29 IS 2 BP 1363 EP 1367 DI 10.1109/20.250652 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA KV879 UT WOS:A1993KV87900025 ER PT J AU GROUNDS, PW ZAKI, KA AF GROUNDS, PW ZAKI, KA TI ANALYSIS OF THE 4 BASIC RESONANT MODE TYPES OF AN ENCLOSED RECTANGULAR MICROSTRIP PATCH INCLUDING THE EFFECTS OF COUPLING BETWEEN PATCHES SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 5TH BIENNIAL IEEE CONF ON ELECTROMAGNETIC FIELD COMPUTATION ( IEEE-CEFC ) CY AUG 03-05, 1992 CL HARVEY MUDD COLL, CLAREMONT, CA SP IEEE, MAGNET SOC, HARVEY MUDD COLL HO HARVEY MUDD COLL AB The lowest order resonant mode of each of the four resonant mode types of an enclosed rectangular microstrip patch on a dielectric substrate are analyzed to determine frequency separation of the modes as a function of patch aspect ratio. The problem is formulated using the Electric Field Integral Equation in the spectral domain, and solved with the Method of Moments. Basis functions were selected which have been used in the study of microstrip line in the past and have been shown to converge quickly to a stable solution. Results are presented showing the separation in frequency of the modes, the dependence of the solution on choosing the correct number of basis functions, and comparisons with other data. Further the case of two coupled patches is analyzed and coupling coefficients are obtained as a function of patch separation. C1 UNIV MARYLAND,COLL PK,MD 20742. RP GROUNDS, PW (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD MAR PY 1993 VL 29 IS 2 BP 1656 EP 1659 DI 10.1109/20.250724 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA KV879 UT WOS:A1993KV87900093 ER PT J AU NATARO, JP DENG, YK GIRON, JA SAVARINO, SJ KOTHARY, MH HALL, R AF NATARO, JP DENG, YK GIRON, JA SAVARINO, SJ KOTHARY, MH HALL, R TI AGGREGATIVE ADHERENCE FIMBRIA-I EXPRESSION IN ENTEROAGGREGATIVE ESCHERICHIA-COLI REQUIRES 2 UNLINKED PLASMID REGIONS SO INFECTION AND IMMUNITY LA English DT Note ID PERSISTENT DIARRHEA; REGULATORY GENE; HEP-2 CELLS; PATTERNS; RNS; ASSOCIATION; STRAINS; CLONING; CFA/I AB Adherence to HEp-2 cells by many enteroaggregative Escherichia coli (EAggEC) strains is associated with the expression of flexible, bundle-forming fimbriae 2 to 3 nm in diameter, designated aggregative adherence fimbriae I (AAF/I). We have previously reported the molecular cloning and TnphoA mutagenesis of AAF/I genes from the large plasmid of prototype EAggEC strain 17-2 (J. P. Nataro, Y. Deng, D. R. Maneval, A. L. German, W. C. Martin, and M. M. Levine, Infect. Immun. 60:2297-2304, 1992). Here, we report that further mapping and subcloning of AAF/I regions suggest that expression of the fimbriae requires two separate plasmid regions (designated regions 1 and 2). Approximately 9 kb of DNA unnecessary for fimbrial expression separates the two regions; this intervening segment encodes the EAggEC heat-stable enterotoxin (EAST1). Neither region was capable of conferring aggregative HEp-2 adherence (AA) when cloned individually; when the two regions were cloned as a single fragment or when each was cloned into a different vector and introduced into the same E. coli HB101 cell, AA was restored. AA-positive constructs also expressed human erythrocyte hemagglutination, autoagglutination in broth cultures, and the production of AAF/I as detected by immunogold electron microscopy. C1 USN,MED RES INST,ENTER DIS PROGRAM,BETHESDA,MD 20889. US FDA,CTR FOOD SAFETY & APPL NUTR,DIV MICROBIOL,VIRULENCE ASSESSMENT BRANCH,WASHINGTON,DC 20204. RP NATARO, JP (reprint author), UNIV MARYLAND,SCH MED,DEPT PEDIAT & MED,CTR VACCINE DEV,BALTIMORE,MD 21201, USA. FU NIAID NIH HHS [1R29-AI-33096, N01-AI-15096] NR 26 TC 68 Z9 68 U1 0 U2 0 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0019-9567 J9 INFECT IMMUN JI Infect. Immun. PD MAR PY 1993 VL 61 IS 3 BP 1126 EP 1131 PG 6 WC Immunology; Infectious Diseases SC Immunology; Infectious Diseases GA KN097 UT WOS:A1993KN09700047 PM 8094379 ER PT J AU KRIDEL, DJ DOLK, DR AF KRIDEL, DJ DOLK, DR TI MODELING TELECOMMUNICATIONS DEMAND ANALYSIS SO INTERFACES LA English DT Article DE INDUSTRIES; COMMUNICATIONS; MARKETING AB Over the last 20 years, legal and regulatory decisions, culminating in the divestiture of the Bell Operating Companies (BOCs) by American Telephone and Telegraph (AT&T) in 1984, have led to an upsurge in the importance of applied econometrics in the telecommunications industry. Increased attention to demand analysis, or empirical economics, has fostered a commensurate increase in modeling sophistication-both for the analyst and for the underlying modeling component of decision support systems. Whereas (aggregate) pooled regression models were more appropriate for the rate-case environment, (disaggregate) optimization-based models have proved more useful for the marketing orientation. Stand-alone analytical systems are no longer sufficient. The critical transition in organizational perspective reflects a need for integrated modeling environments that offer multiple modeling paradigms, linkage among models, consistent access to data resources, and intelligent support. C1 USN,POSTGRAD SCH,DEPT ADM SCI 54DK,MONTEREY,CA 93943. RP KRIDEL, DJ (reprint author), SOUTHWESTERN BELL CORP,BELL CTR 1,ROOM 40-U-5,ST LOUIS,MO 63101, USA. NR 12 TC 1 Z9 1 U1 0 U2 1 PU INST OPERATIONS RESEARCH MANAGEMENT SCIENCES PI LINTHICUM HTS PA 901 ELKRIDGE LANDING RD, STE 400, LINTHICUM HTS, MD 21090-2909 SN 0092-2102 J9 INTERFACES JI Interfaces PD MAR-APR PY 1993 VL 23 IS 2 BP 3 EP 13 DI 10.1287/inte.23.2.3 PG 11 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA KY422 UT WOS:A1993KY42200002 ER PT J AU WROBLEWSKI, DE JOSHI, Y AF WROBLEWSKI, DE JOSHI, Y TI COMPUTATIONS OF LIQUID IMMERSION COOLING FOR A PROTRUDING HEAT-SOURCE IN A CUBICAL ENCLOSURE SO INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER LA English DT Article ID 3-DIMENSIONAL NATURAL-CONVECTION AB Three-dimensional natural convection flow and heat transfer were studied numerically for a heated, protruding substrate-mounted chip or package in a cubic enclosure filled with a dielectric liquid. The governing steady-state equations for the natural convection within the liquid and the conjugate conduction within the element and the substrate were solved using a finite-volume method over a wide range of Rayleigh numbers (Ra) and substrate-to-fluid thermal conductivity ratios (R(s)). Conduction through the substrate plays a dominant role in the cooling of the chip for values of R(s) greater than 10. Comparison of the numerical results with experimental data showed reasonable agreement, particularly in the patterns of isotherms observed on the substrate surface. C1 USN,POSTGRAD SCH,MONTEREY,CA 93943. NR 26 TC 27 Z9 27 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0017-9310 J9 INT J HEAT MASS TRAN JI Int. J. Heat Mass Transf. PD MAR PY 1993 VL 36 IS 5 BP 1201 EP 1218 DI 10.1016/S0017-9310(05)80090-0 PG 18 WC Thermodynamics; Engineering, Mechanical; Mechanics SC Thermodynamics; Engineering; Mechanics GA KV199 UT WOS:A1993KV19900007 ER PT J AU SCHWARTZ, PR AF SCHWARTZ, PR TI CLASSIFICATION CLARIFICATION SO ISSUES IN SCIENCE AND TECHNOLOGY LA English DT Editorial Material RP SCHWARTZ, PR (reprint author), USN,RES LAB,REMOTE SENSING PHYS BRANCH,WASHINGTON,DC 20375, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0748-5492 J9 ISSUES SCI TECHNOL JI Issues Sci. Technol. PD SPR PY 1993 VL 9 IS 3 BP 9 EP 10 PG 2 WC Engineering, Multidisciplinary; Engineering, Industrial; Multidisciplinary Sciences; Social Issues SC Engineering; Science & Technology - Other Topics; Social Issues GA KY168 UT WOS:A1993KY16800007 ER PT J AU CHANDRASEKHARA, MS AHMED, S CARR, LW AF CHANDRASEKHARA, MS AHMED, S CARR, LW TI SCHLIEREN STUDIES OF COMPRESSIBILITY EFFECTS ON DYNAMIC STALL OF TRANSIENTLY PITCHING AIRFOILS SO JOURNAL OF AIRCRAFT LA English DT Article AB Compressibility effects on the flowfield of an airfoil executing rapid transient pitching motion from 0-60 deg over a wide range of Mach numbers and pitching rates were studied using a stroboscopic schlieren flow visualization technique. The studies have led to the first direct experimental documentation of multiple shocks on the airfoil upper surface flow for certain conditions. Also, at low Mach numbers, additional coherent vortical structures were found to be present along with the dynamic stall vortex, whereas at higher Mach numbers the flow was dominated by a single vortex. The delineating Mach number for significant compressibility effects was 0.3 and the dynamic stall process was accelerated by increasing the Mach number above that value. Increasing the pitch rate monotonically delayed stall to angles of attack as large as 27 deg. RP CHANDRASEKHARA, MS (reprint author), USN,POSTGRAD SCH,NAVY NASA JOINT INST AERONAUT,DEPT AERONAUT & ASTRONAUT,MONTEREY,CA 93943, USA. NR 0 TC 13 Z9 13 U1 1 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAR-APR PY 1993 VL 30 IS 2 BP 213 EP 220 DI 10.2514/3.48268 PG 8 WC Engineering, Aerospace SC Engineering GA KV465 UT WOS:A1993KV46500008 ER PT J AU LUONG, PV THOMPSON, JF GATLIN, B AF LUONG, PV THOMPSON, JF GATLIN, B TI SOLUTION-ADAPTIVE AND QUALITY-ENHANCING GRID GENERATION SO JOURNAL OF AIRCRAFT LA English DT Article AB A straightforward and effective procedure for converting any CFD code that operates on a block-structured grid into a dynamically adaptive code is presented. Coupling between the grid generation system and the flow solver is through external files, so that only minimal changes are required in the source codes. Adaptive grids are generated using elliptic equation techniques. The mechanism of grid movement is control functions, which form the right side of the system of generating equations. These control functions can be specified to include grid quality measures, flow solutions, solution gradients, solution curvature, or any combination of these. Adaptation can be static, dynamic, or periodic. Typical results for adaptation in compressible and incompressible flows are presented and compared with solutions obtained on static grids. RP LUONG, PV (reprint author), USN,OCEANOG OFF,CODE MSA,BAY ST LOUIS,MS 39522, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0021-8669 J9 J AIRCRAFT JI J. Aircr. PD MAR-APR PY 1993 VL 30 IS 2 BP 227 EP 234 DI 10.2514/3.48270 PG 8 WC Engineering, Aerospace SC Engineering GA KV465 UT WOS:A1993KV46500010 ER PT J AU BROOK, I GILLMORE, JD AF BROOK, I GILLMORE, JD TI INVITRO SUSCEPTIBILITY AND INVIVO EFFICACY OF ANTIMICROBIALS IN THE TREATMENT OF INTRAABDOMINAL SEPSIS IN MICE SO JOURNAL OF ANTIMICROBIAL CHEMOTHERAPY LA English DT Article ID BETA-LACTAM ANTIBIOTICS; 2 MILITARY HOSPITALS; BACTEROIDES-FRAGILIS; ESCHERICHIA-COLI; CLINDAMYCIN; BACTEREMIA; EXPERIENCE; INFECTIONS; ORGANISMS RP BROOK, I (reprint author), USN,MED RES INST,ARMED FORCES RADIOBIOL RES INST,BETHESDA,MD 20889, USA. NR 26 TC 7 Z9 7 U1 1 U2 1 PU W B SAUNDERS CO LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0305-7453 J9 J ANTIMICROB CHEMOTH JI J. Antimicrob. Chemother. PD MAR PY 1993 VL 31 IS 3 BP 393 EP 401 DI 10.1093/jac/31.3.393 PG 9 WC Infectious Diseases; Microbiology; Pharmacology & Pharmacy SC Infectious Diseases; Microbiology; Pharmacology & Pharmacy GA KU938 UT WOS:A1993KU93800007 PM 8486573 ER PT J AU HODGES, DH ATILGAN, AR DANIELSON, DA AF HODGES, DH ATILGAN, AR DANIELSON, DA TI A GEOMETRICALLY NONLINEAR-THEORY OF ELASTIC PLATES SO JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME LA English DT Article ID FINITE ROTATION; SHELL THEORY; BEAM KINEMATICS; FORMULATION; VECTOR AB A set of kinematical and intrinsic equilibrium equations are derived for plates undergoing large deflection and rotation hut with small strain. The large rotation is handled hy means of the general finite rotation of a frame in which the material points that are originally along a normal line in the undeformed plate undergo only small displacements. The unit vector fixed in this frame, which coincides with the normal when the plate is undeformed, is not in general normal to the deformed plate average surface because of transverse shear. The arbitrarily large displacement and rotation of this frame, which vary over the surface of the plate, are termed global deformation; the small relative displacement is termed warping. It is shown that rotation of the frame about the normal is not zero and that it can be expressed in terms of other global deformation variables. Exact intrinsic virtual strain-displacement relations are derived; based on a reduced two-dimensional strain energy function from which the warping has been systematically eliminated, a set of intrinsic equilibrium equations follow. It is shown that only five equilibrium equations can be derived in this manner, because the component of virtual rotation about the normal is not independent. These equilibrium equations contain terms which cannot be obtained without the use of a finite rotation vector which contains three nonzero components. These extra terms correspond to the difference of in-plane shear stress resultants in other theories; this difference is a reactive quantity in the present theory. C1 NAVAL POSTGRAD SCH,DEPT MATH,MONTEREY,CA. RP HODGES, DH (reprint author), GEORGIA INST TECHNOL,SCH AEROSP ENGN,ATLANTA,GA 30332, USA. RI Atilgan, Ali Rana/A-7805-2011 NR 32 TC 39 Z9 39 U1 0 U2 6 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0021-8936 J9 J APPL MECH-T ASME JI J. Appl. Mech.-Trans. ASME PD MAR PY 1993 VL 60 IS 1 BP 109 EP 116 DI 10.1115/1.2900732 PG 8 WC Mechanics SC Mechanics GA KV318 UT WOS:A1993KV31800017 ER PT J AU MYERS, SM BROWN, GA REVESZ, AG HUGHES, HL AF MYERS, SM BROWN, GA REVESZ, AG HUGHES, HL TI DEUTERIUM INTERACTIONS WITH ION-IMPLANTED SIO2 LAYERS IN SILICON SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID MOLECULAR-HYDROGEN; VITREOUS SILICA; MOS DEVICES; INTERFACE; BREAKDOWN; DIFFUSION; CENTERS; OXIDES; BEAM AB The interactions of deuterium gas (D2) with implantation-formed Si-SiO2-Si structures were investigated in the temperature range 500-1000-degrees-C using nuclear-reaction analysis. At 600-degrees-C and above there is substantial permeation of D through the overlying Si layer, and this D becomes stably bound within the buried SiO2. The reactions within the implantation-formed oxide differ significantly from those in thermal oxides and are characterized by two distinct time regimes. In the first regime there is a rapid transient reaction which, at least at 600-degrees-C, is controlled by permeation through the Si overlayer. After the initial transient there is a much slower reaction within the oxide, prominent at 700-degrees-C and higher, which is controlled by a reaction barrier. The results indicate that the implantation-formed oxides contain more numerous hydrogen-reactive sites than do silica or thermal oxides on Si, and further that the number of these sites is substantially increased by Si epitaxial deposition. Deuterium permeation through the Si overlayer was used to determine the permeability of hydrogen in Si at 600-degrees-C for the first time. C1 TEXAS INSTRUMENTS INC,DALLAS,TX 75265. REVESZ ASSOCIATES,BETHESDA,MD 20817. USN,RES LAB,WASHINGTON,DC 20375. RP MYERS, SM (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 32 TC 29 Z9 29 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 MAR 1 PY 1993 VL 73 IS 5 BP 2196 EP 2206 DI 10.1063/1.353122 PG 11 WC Physics, Applied SC Physics GA KT868 UT WOS:A1993KT86800021 ER PT J AU NOVOTNY, JA BRIDGEWATER, BJM HIMM, JF HOMER, LD AF NOVOTNY, JA BRIDGEWATER, BJM HIMM, JF HOMER, LD TI QUANTIFYING THE EFFECT OF INTRAVASCULAR PERFLUOROCARBON ON XENON ELIMINATION FROM CANINE MUSCLE SO JOURNAL OF APPLIED PHYSIOLOGY LA English DT Article DE PHARMACOKINETICS; FLUOROCARBON; INERT GAS ID DECOMPRESSION-SICKNESS; SOLUBILITY; BLOOD AB Intravenous infusions of perfluorocarbon (PFC) may improve decompression sickness outcome in animals by accelerating inert gas elimination from tissue, but any such effect has not been quantified experimentally. In this study we used an animal model of tissue Xe kinetics to test this hypothesis and to quantify the effect of PFC. Eight dogs were ventilated with dilute Xe-133 in air for 4 h of Xe uptake. Four dogs were then given an infusion (20 ml/kg iv) of a 40% (vol/vol) perfluorodecalin-glycerol emulsion, and four control dogs were given only isotonic glycerol. All were then switched to open-circuit air breathing for 4 h of Xe elimination. During this time Xe radioactivity-time curves were recorded from two intact hind leg muscles, and the Xe mean residence times during elimination were estimated using an analysis by moments and compared by group. Tissue blood flows were measured using microspheres once during Xe uptake and twice during Xe elimination, and cardiac outputs were measured by thermodilution at 30-min intervals. In the PFC group the measured circulating PFC fraction increased the calculated Xe solubility by an average factor of 1.77 and so was expected to increase the Xe elimination rate by 77%. The observed Xe mean residence times on elimination for the PFC group averaged 33.5 min [95% confidence interval (CI) 19.5-47.6] compared with the glycerol control average of 70.1 min (95%Cl 56.1-84.2), representing an increase in the rate of Xe elimination by a factor of 2.09 or 109%. We conclude that the infusion of a perfluorodecalin emulsion accelerates the elimination of Xe from tissue at least to the extent predicted from the circulating PFC. Because the perfluorodecalin-to-blood solubility ratio of nitrogen is double that of Xe, a fourfold acceleration would be expected for the elimination of tissue nitrogen with the PFC levels achieved in this study. C1 USN,MED RES INST,BETHESDA,MD 20889. ROYAL BROMPTON NATL HEART & LUNG HOSP,LONDON SW3 6HP,ENGLAND. NR 13 TC 16 Z9 17 U1 0 U2 1 PU AMER PHYSIOLOGICAL SOC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 8750-7587 J9 J APPL PHYSIOL JI J. Appl. Physiol. PD MAR PY 1993 VL 74 IS 3 BP 1356 EP 1360 PG 5 WC Physiology; Sport Sciences SC Physiology; Sport Sciences GA KV032 UT WOS:A1993KV03200053 PM 8482678 ER PT J AU LEAHY, JG JONESMEEHAN, JM PULLIAS, EL COLWELL, RR AF LEAHY, JG JONESMEEHAN, JM PULLIAS, EL COLWELL, RR TI TRANSPOSON MUTAGENESIS IN ACINETOBACTER-CALCOACETICUS RAG-1 SO JOURNAL OF BACTERIOLOGY LA English DT Article ID ESCHERICHIA-COLI; BACTERIA; CLONING; CHROMOSOME; INSERTION; VECTORS; GENES; OIL AB Molecular genetic studies of Acinetobacter spp. have been greatly limited by the lack of a method for transposon mutagenesis. In this study, a genetically engineered derivative of Tn10, mini-Tn10PttKm, was conjugally transferred in plate matings from Escherichia coli SM10[(lambdapir)(pLOFPttKm)] to Acinetobacter calcoaceticus RAG-1. Transfer frequencies were dependent on mating ratios and varied from 7.9 x 10(-8) to 3.4 x 10(-7) per recipient cell. The 27 lipase-deficient transconjugants which were isolated exhibited several different phenotypes, including gelatinase mutants, esterase mutants, and putative auxotrophs. Southern blot analysis confirmed the insertion of the mini-Tn10PttKm transposon in single, unique sites in five transconjugants. Four of five lipase mutants contained single insertions of mini-Tn10PttKm in the same chromosomal restriction fragments. To our knowledge, this is the first report of the use of a transposon for direct, generalized mutagenesis in Acinetobacter spp. C1 UNIV MARYLAND,DEPT MICROBIOL,COLL PK,MD 20742. USN,NAVAL SURFACE WARFARE CTR,SILVER SPRING,MD 20903. NR 18 TC 17 Z9 19 U1 0 U2 0 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0021-9193 J9 J BACTERIOL JI J. Bacteriol. PD MAR PY 1993 VL 175 IS 6 BP 1838 EP 1840 PG 3 WC Microbiology SC Microbiology GA KT165 UT WOS:A1993KT16500033 PM 8383667 ER PT J AU WU, L GARLAND, CW SHASHIDHAR, R AF WU, L GARLAND, CW SHASHIDHAR, R TI SEARCH FOR SMAD-SMAD' TRANSITIONS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Note ID LIQUID-CRYSTALS; POLYMORPHISM C1 MIT, CTR MAT SCI & ENGN, CAMBRIDGE, MA 02139 USA. USN, RES LAB, CTR BIOMOLEC SCI & ENGN, WASHINGTON, DC 20375 USA. RP MIT, DEPT CHEM, CAMBRIDGE, MA 02139 USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 1 PY 1993 VL 98 IS 5 BP 4309 EP 4310 DI 10.1063/1.465040 PG 2 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KR111 UT WOS:A1993KR11100080 ER PT J AU CAMPBELL, J LOWE, J WALZ, S EZZELL, J AF CAMPBELL, J LOWE, J WALZ, S EZZELL, J TI RAPID AND SPECIFIC IDENTIFICATION OF YERSINIA-PESTIS BY USING A NESTED POLYMERASE CHAIN-REACTION PROCEDURE SO JOURNAL OF CLINICAL MICROBIOLOGY LA English DT Article AB We developed a 4-h nested polymerase chain reaction assay that detected a region of the plasminogen activator gene of Yersinia pestis in 100% of 43 Y. pestis strains isolated from humans, rats, and fleas yet was unreactive with the closely related species Yersinia enterocolitica and Yersinia pseudotuberculosis. C1 USA,MED RES INST INFECT DIS,FT DETRICK,MD 21702. RP CAMPBELL, J (reprint author), USN,RES LAB,CODE 6900,WASHINGTON,DC 20375, USA. NR 6 TC 28 Z9 36 U1 0 U2 1 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0095-1137 J9 J CLIN MICROBIOL JI J. Clin. Microbiol. PD MAR PY 1993 VL 31 IS 3 BP 758 EP 759 PG 2 WC Microbiology SC Microbiology GA KM810 UT WOS:A1993KM81000063 PM 8458980 ER PT J AU NORDQUIST, PER HENRY, RL GORMAN, RJ AF NORDQUIST, PER HENRY, RL GORMAN, RJ TI SEQUENTIAL ETCHING OF GAAS SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 10TH INTERNATIONAL CONF ON CRYSTAL GROWTH ( ICCG-10 ) CY AUG 16-21, 1992 CL SAN DIEGO, CA SP INT UNION CRYSTAL GROWTH, AIRTRON, AKZO, ALLIED SIGNAL, BERTRAM LABS, CERES, CLEVELAND CRYSTALS, CRYSTAL ASSOC, CRYSTAL SYST, CRYSTAL TECHNOL ID DISLOCATION ETCH; GALLIUM-ARSENIDE; MORPHOLOGY; DEFECTS AB We have etched (100)-oriented GaAs, first with the AB etch, and then with the NaOH KOH eutectic. Using this sequential etching procedure it is often possible to correlate etch features obtained with the two etches and to reveal, for example, the direction of branching dislocations. The sequential etching process provides more information about the defect structure of GaAs than can be obtained from either etch used separately. RP NORDQUIST, PER (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 15 TC 0 Z9 0 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD MAR PY 1993 VL 128 IS 1-4 BP 483 EP 487 DI 10.1016/0022-0248(93)90372-4 PN 1 PG 5 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA KU915 UT WOS:A1993KU91500087 ER PT J AU DESISTO, WJ HENRY, RL NEWMAN, HS OSOFSKY, MS CESTONE, VC AF DESISTO, WJ HENRY, RL NEWMAN, HS OSOFSKY, MS CESTONE, VC TI METALORGANIC CHEMICAL VAPOR-DEPOSITION OF YBA2CU3O7-DELTA ON SRTIO3 AND LAALO3 SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 10TH INTERNATIONAL CONF ON CRYSTAL GROWTH ( ICGG-10 ) CY AUG 16-21, 1992 CL SAN DIEGO, CA ID MICROWAVE SURFACE-RESISTANCE; THIN-FILMS AB Thin films of YBa2Cu3O7-delta have been deposited on (100) SrTiO3 and (100) LaAlO3 by metalorganic chemical vapor deposition. The tetramethylheptanedionates of Y, Ba, and Cu were used as the metalorganic sources for transport. Films were grown under reduced pressure using nitrous oxide as an oxidizing source. Growth temperatures were varied from 700 to 775-degrees-C. Film growth rates were between 500 and 1000 angstrom/h. Films deposited on both LaAlO3 and SrTiO3 at 775-degrees-C have T(c)'s between 87 and 89 K with J(c)'s of (1-3) X 10(6) angstrom/cm2 (measured at 77 K). At lower growth temperatures (700-750-degrees-C), T(c) and J(c) of films on LaAlO3 degrade more significantly than films on SrTiO3. Microwave surface resistance vs. temperature measurements for thicker films (i.e. 4000 angstrom) grown at 775-degrees-C have been measured in a 36 GHz cavity and show a sharp drop through the transition temperature, indicative of high quality thin films. Calculated R(s) values corresponding to 10 GHz indicate improvements greater than an order of magnitude over copper metal at 77 K. RP DESISTO, WJ (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Osofsky, Michael/A-1050-2010 NR 8 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD MAR PY 1993 VL 128 IS 1-4 BP 777 EP 780 DI 10.1016/S0022-0248(07)80043-1 PN 2 PG 4 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA KV697 UT WOS:A1993KV69700042 ER PT J AU HARTMAN, PJ AF HARTMAN, PJ TI FINDING COST-EFFECTIVE APPLICATIONS FOR EXPERT SYSTEMS SO JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME LA English DT Article AB Expert systems are one of the few areas of artificial intelligence which have successfully made the transition from research and development to practical application. The key to fielding a successful expert system is finding the right problem to solve. AI costs, including all the development and testing, are so high that the problems must be very important to justify the effort. This paper develops a systematic way of trying to predict the future. It provides robust decision-making criteria, which can be used to predict the success or failure of proposed expert systems. The methods focus on eliminating obviously unsuitable problems and performing risk assessments and cost evaluations of the program. These assessments include evaluation of need, problem complexity, value, user experience, and the processing speed required. If an application proves feasible, the information generated during the decision phase can be then used to speed the development process. RP HARTMAN, PJ (reprint author), NAVAL SEA SYST COMMAND,DIV ENGN,NAVSEA 05Q3,WASHINGTON,DC 20362, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0195-0738 J9 J ENERG RESOUR-ASME JI J. Energy Resour. Technol.-Trans. ASME PD MAR PY 1993 VL 115 IS 1 BP 56 EP 61 DI 10.1115/1.2905970 PG 6 WC Energy & Fuels SC Energy & Fuels GA KU130 UT WOS:A1993KU13000008 ER PT J AU MISSALE, G REDEKER, A PERSON, J FOWLER, P GUILHOT, S SCHLICHT, HJ FERRARI, C CHISARI, FV AF MISSALE, G REDEKER, A PERSON, J FOWLER, P GUILHOT, S SCHLICHT, HJ FERRARI, C CHISARI, FV TI HLA-A31-RESTRICTED AND HLA-AW68-RESTRICTED CYTOTOXIC T-CELL RESPONSES TO A SINGLE HEPATITIS-B VIRUS NUCLEOCAPSID EPITOPE DURING ACUTE VIRAL-HEPATITIS SO JOURNAL OF EXPERIMENTAL MEDICINE LA English DT Article ID TOXIC LYMPHOCYTES-T; MHC CLASS-II; SYNTHETIC PEPTIDES; VACCINIA VIRUS; CORE ANTIGEN; RECOGNITION; SPECIFICITY; INFECTION; MOLECULES; PROTEIN AB We have recently developed the technology to identify and characterize the human histocompatibility leukocyte antigen (HLA) class I-restricted, CD8+ cytotoxic T lymphocyte (CTL) response to hepatitis B virus (HBV)-encoded antigens in patients with acute viral hepatitis. CTL are expanded in vitro by stimulation with HBV-derived synthetic peptides and selected by restimulation with a panel of HLA-matched stable transfectants that express the corresponding HBV protein. We have recently reported the existence of an HLA-A2-restricted, CD8+ CTL response to an epitope located between residues 18 and 27 of the HBV nucleocapsid core antigen (HBcAg). We now report the discovery of a CTL epitope located between HBcAg residues 141 and 151 that completely overlaps a critical domain in the viral nucleocapsid protein that is essential for its nuclear localization and genome packaging functions as well as processing of the precore protein. The CTL response to this epitope is dually restricted by the HLA-A31 and HLA-Aw68 alleles, which, unexpectedly, appear to use a common binding motif based on the results of alanine substitution and competition analysis, and the binding properties of these two alleles predicted from their known primary sequence, and from the three-dimensional structure of HLA-Aw68. We have also demonstrated that the HBV-specific CTL response to this epitope is polyclonal during acute viral hepatitis, since these two restriction elements can present the HBcAg 141-151 epitope to independent CTL clones derived from a single patient; and that the CTL response is multispecific, since HLA-A2-restricted and HLA-Aw68-restricted CTL responses to HBcAg 18-27 and HBcAg 141-151, respectively, have been identified to coexist in another patient. The foregoing argue against the emergence of CTL escape mutants as a significant problem during HBV infection, especially at this locus, where mutations might be incompatible with viral replication. Finally, our data suggest an association between the HBV-specific CTL response and viral clearance, and they have implications for the design of immunotherapeutic strategies to terminate HBV infection in chronically infected patients. C1 SCRIPPS RES INST, DEPT MOLEC & EXPTL MED, LA JOLLA, CA 92037 USA. UNIV SO CALIF, SCH MED, RANCHO LOS AMIGOS MED CTR, LIVER UNIT, LOS ANGELES, CA 90033 USA. USN HOSP, DEPT GASTROENTEROL, SAN DIEGO, CA 92134 USA. UNIV ULM, DEPT VIROL, W-7900 ULM, GERMANY. RI Chisari, Francis/A-3086-2008; Missale, Gabriele/J-6083-2016; Ferrari, Carlo/D-5663-2017; OI Missale, Gabriele/0000-0001-6691-8701; Ferrari, Carlo/0000-0002-7843-4963; Chisari, Francis/0000-0002-4832-1044 FU NCRR NIH HHS [RR-00833]; PHS HHS [A1-20001] NR 39 TC 200 Z9 211 U1 0 U2 2 PU ROCKEFELLER UNIV PRESS PI NEW YORK PA 1114 FIRST AVE, 4TH FL, NEW YORK, NY 10021 SN 0022-1007 J9 J EXP MED JI J. Exp. Med. PD MAR 1 PY 1993 VL 177 IS 3 BP 751 EP 762 DI 10.1084/jem.177.3.751 PG 12 WC Immunology; Medicine, Research & Experimental SC Immunology; Research & Experimental Medicine GA KN886 UT WOS:A1993KN88600018 PM 7679709 ER PT J AU KIDWELL, DA AF KIDWELL, DA TI ANALYSIS OF PHENCYCLIDINE AND COCAINE IN HUMAN HAIR BY TANDEM MASS-SPECTROMETRY SO JOURNAL OF FORENSIC SCIENCES LA English DT Article DE TOXICOLOGY; COCAINE; TANDEM MASS SPECTROMETRY; HAIR ID PERFORMANCE LIQUID-CHROMATOGRAPHY; HEROIN-ADDICTS; FLUORIMETRIC DETECTION; MENSTRUAL BLOODSTAIN; PERSPIRATION STAIN; ASSESSING MORPHINE; GAS; METABOLITE; SAMPLE; DRUGS AB A confirmation procedure for the analysis of cocaine, benzoylecgonine, ecgonine, and phencyclidine (PCP) in human hair using tandem mass spectrometry has been developed. This procedure requires no solvent extraction and thus can examine the metabolites of drugs such as cocaine. Hairs from six cocaine users were examined and the amount of cocaine and its ratio to the metabolites was not correlated to the reported use pattern. Only PCP was detected in the hair from a PCP user, no metabolites were found. In passive exposure experiments. hair was found to tightly absorb PCP from aqueous solutions, which mimics the incorporation of PCP by the body. These results indicate that drugs may be absorbed onto the hair of nonusers and become tightly bound. RP KIDWELL, DA (reprint author), USN,RES LAB,CODE 6177,WASHINGTON,DC 20375, USA. NR 22 TC 39 Z9 41 U1 0 U2 0 PU AMER SOC TESTING MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 SN 0022-1198 J9 J FORENSIC SCI JI J. Forensic Sci. PD MAR PY 1993 VL 38 IS 2 BP 272 EP 284 PG 13 WC Medicine, Legal SC Legal Medicine GA KR555 UT WOS:A1993KR55500009 PM 8454988 ER PT J AU WANG, YM AF WANG, YM TI ON THE LATITUDE AND SOLAR-CYCLE DEPENDENCE OF THE INTERPLANETARY MAGNETIC-FIELD STRENGTH SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID HELIOSPHERIC CURRENT SHEET; SUNS POLAR FIELDS; SECTOR STRUCTURE; FLUX; EVOLUTION; ROTATION; REGIONS; MODEL AB Using 20 years of solar magnetograph and in-ecliptic interplanetary magnetic field (IMF) measurements, we verify that the radial IMF component (B(r)) can be approximated by a superposition of the Sun's inclined magnetic dipole moment and a current sheet normal to the dipole axis. The net field is found empirically to be approximately 3 times stronger along the dipole axis than near the current sheet, whose effect is to redistribute flux toward the dipole equator. The radial IMF intensity at a given latitude and phase of the sunspot cycle is determined by the changing strength and inclination of the dipole, which attains its maximum amplitude when its axis is aligned with the solar poles near sunspot minimum. The model predicts that over the sunspot cycle, \B(r)\ should undergo the least variation near the heliographic equator and the greatest variation above the Sun's poles, where it decreases by a factor of 10 between sunspot minimum and sunspot maximum. The latitudinal gradients in B(r) are expected to be steepest near sunspot minimum and flattest near maximum. The model suggests that Ulysses will encounter very strong fields when it flies over the solar poles during the declining phase of sunspot cycle 22. RP WANG, YM (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 7672W,WASHINGTON,DC 20375, USA. NR 35 TC 29 Z9 29 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD MAR 1 PY 1993 VL 98 IS A3 BP 3529 EP 3537 DI 10.1029/92JA02396 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KP929 UT WOS:A1993KP92900006 ER PT J AU ESTEP, L AF ESTEP, L TI IMPACT ON THE COMPUTATION OF THE MEDIUM MTF BY ESTIMATION OF THE TOTAL SCATTERING COEFFICIENT SO JOURNAL OF IMAGING SCIENCE AND TECHNOLOGY LA English DT Article AB Using both sea water data and research tank water data, coupled with the theoretical approach of Wells, calculations of the modulation transfer function (MTF) for the water medium are performed via use of the Wells Decay Function. Various approximate relationships are used to derive the value of b, the total scattering coefficient, which enters into the MTF calculation. The approximated b values are used to compute the water MTF. These estimated MTF calculations are compared with experimental data MTF calculations for which the actual water value of b was derived. Error assessments and recommendations for the various b relationships used in the MTF computation are made. RP ESTEP, L (reprint author), USN,RES LAB,OCEAN SCI DIRECTORATE,DIV MAPPING CHARTING & GEODESY,BAY ST LOUIS,MS 39529, USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU I S & T - SOC IMAGING SCIENCE TECHNOLOGY PI SPRINGFIELD PA 7003 KILWORTH LANE, SPRINGFIELD, VA 22151 SN 8750-9237 J9 J IMAGING SCI TECHN JI J. Imaging Sci. Technol. PD MAR-APR PY 1993 VL 37 IS 2 BP 129 EP 132 PG 4 WC Imaging Science & Photographic Technology SC Imaging Science & Photographic Technology GA LK276 UT WOS:A1993LK27600003 ER PT J AU WALDRON, A AF WALDRON, A TI REVOLUTIONARIES, MONARCHISTS, AND CHINATOWNS - CHINESE POLITICS IN THE AMERICA AND THE 1911 REVOLUTION - MA,LEA SO JOURNAL OF INTERDISCIPLINARY HISTORY LA English DT Book Review RP WALDRON, A (reprint author), USN,COLL WAR,WASHINGTON,DC 20350, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU MIT PRESS PI CAMBRIDGE PA 55 HAYWARD ST JOURNALS DEPT, CAMBRIDGE, MA 02142 SN 0022-1953 J9 J INTERDISCIPL HIST JI J. Interdiscip. Hist. PD SPR PY 1993 VL 23 IS 4 BP 830 EP 832 DI 10.2307/206328 PG 3 WC History SC History GA KQ773 UT WOS:A1993KQ77300052 ER PT J AU WU, CT AF WU, CT TI TEACHING OOP TO BEGINNERS SO JOURNAL OF OBJECT-ORIENTED PROGRAMMING LA English DT Article C1 USN,POSTGRAD SCH,WASHINGTON,DC 20350. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SIGS PUBLICATIONS INC PI NEW YORK PA 588 BROADWAY SUITE 604, NEW YORK, NY 10012-5408 SN 0896-8438 J9 J OBJECT-ORIENT PROG JI J. Object-Oriented Program. PD MAR-APR PY 1993 VL 6 IS 1 BP 47 EP 50 PG 4 WC Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA KP601 UT WOS:A1993KP60100009 ER PT J AU BLOMSHIELD, FS MATHES, HB AF BLOMSHIELD, FS MATHES, HB TI PRESSURE OSCILLATIONS IN POST-CHALLENGER SPACE-SHUTTLE REDESIGNED SOLID ROCKET MOTORS SO JOURNAL OF PROPULSION AND POWER LA English DT Article AB Data from the first seven solid rocket motor (SRM) static tests were used to establish upper bounds for the maximum acoustic pressure amplitudes in the latter half of firing. Those bounds have since been used as a basis for worst-case simulation scenarios by specialists in structural dynamics at NASA and Rockwell International, and to provide a basis for evaluating data from individual motors which were tested subsequent to the original seven SRMs. The purpose of this article is to compare current motor data with data from the early motors and determine whether or not the upper bounds need to be recalculated. Comparisons of chamber pressure amplitudes in redesigned solid rocket motors (RSRMs) with the predicted upper bounds, based on the original seven motors, initially suggest that the original bounds are no longer suitable descriptors for the current motor designs. However, a rigorous statistical analysis of the SRM and RSRM motor data indicates that the data are from similar statistical populations. C1 COMARCO INC,PROP BRANCH,RIDGECREST,CA 93555. RP BLOMSHIELD, FS (reprint author), USN,CTR AIR WARFARE,CHINA LAKE,CA 93555, USA. NR 4 TC 16 Z9 16 U1 0 U2 2 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD MAR-APR PY 1993 VL 9 IS 2 BP 217 EP 221 DI 10.2514/3.23612 PG 5 WC Engineering, Aerospace SC Engineering GA KR542 UT WOS:A1993KR54200010 ER PT J AU MCCURDY, CM RUTHERFORD, SE CODDINGTON, CC AF MCCURDY, CM RUTHERFORD, SE CODDINGTON, CC TI SYNCOPE AND SUDDEN ARRHYTHMIC DEATH COMPLICATING PREGNANCY - A CASE-REPORT OF ROMANO-WARD SYNDROME SO JOURNAL OF REPRODUCTIVE MEDICINE LA English DT Article AB Romano-Ward syndrome is a subtype of prolonged QT syndrome with autosomal dominant inheritance. Stress-induced syncope and sudden death are secondary to ventricular tachydysrhythmias. A case report of Romano-Ward syndrome complicating pregnancy is presented. Successful therapy with propranolol for life-threatening dysrhythmias was achieved. An excellent neonatal outcome occurred. C1 USN HOSP PORTSMOUTH,DEPT OBSTET & GYNECOL,DIV MATERNAL FETAL MED,PORTSMOUTH,VA. NR 5 TC 7 Z9 8 U1 0 U2 0 PU SCI PRINTERS & PUBL INC PI ST LOUIS PA P.O. DRAWER 12425 8342 OLIVE BLVD, ST LOUIS, MO 63132 SN 0024-7758 J9 J REPROD MED JI J. Reprod. Med. PD MAR PY 1993 VL 38 IS 3 BP 233 EP 234 PG 2 WC Obstetrics & Gynecology SC Obstetrics & Gynecology GA KT812 UT WOS:A1993KT81200016 PM 8098062 ER PT J AU NOBLESSE, F ANTHONY, DG YANG, C AF NOBLESSE, F ANTHONY, DG YANG, C TI WATER-WAVES RADIATED BY COHERENT VORTICES IN A SUBMERGED JET SO JOURNAL OF SHIP RESEARCH LA English DT Article RP NOBLESSE, F (reprint author), NSWC,CARDEROCK DIV,DAVID TAYLOR MODEL BASIN,BETHESDA,MD, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC NAVAL ARCH MARINE ENG PI JERSEY CITY PA 601 PAVONIA AVENUE, JERSEY CITY, NJ 07306 SN 0022-4502 J9 J SHIP RES JI J. Ship Res. PD MAR PY 1993 VL 37 IS 1 BP 13 EP 15 PG 3 WC Engineering, Marine; Engineering, Civil SC Engineering GA KT380 UT WOS:A1993KT38000003 ER PT J AU KO, SH AF KO, SH TI PERFORMANCE OF VARIOUS SHAPES OF HYDROPHONES IN THE REDUCTION OF TURBULENT-FLOW NOISE SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB Turbulent boundary layer pressure fluctuations can be reduced by filtering of its wave-number response with either a finite hydrophone or a hydrophone array, or by filtering the wave-number response through an elastomer layer. In general practice, various configurations of hydrophone arrays are embedded within a layer of elastomer, thus reducing the turbulent boundary layer pressure fluctuations. The theoretical model considered in this paper is a plane elastomer layer backed by an infinitely rigid surface; the front side of the layer is exposed to turbulent flow. This paper examines the performance of various shapes (square/rectangle, triangle, rhomboid, and circle) of hydrophones flush-mounted on a rigid surface and embedded within the elastomer layer in reducing the turbulent flow noise. The results presented are numerically calculated noise reductions for various parameters related to hydrophone shapes. RP KO, SH (reprint author), USN,UNDERSEA WARFARE CTR DETACHMENT,NEW LONDON,CT 06320, USA. NR 11 TC 8 Z9 14 U1 1 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD MAR PY 1993 VL 93 IS 3 BP 1293 EP 1299 DI 10.1121/1.405414 PG 7 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KR974 UT WOS:A1993KR97400008 ER PT J AU WOLF, JW DIACHOK, OI YANG, TC WALES, S DICUS, R AF WOLF, JW DIACHOK, OI YANG, TC WALES, S DICUS, R TI VERY-LOW-FREQUENCY UNDER-ICE REFLECTIVITY SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID OCEAN AB This paper describes a direct method to model under-ice reflection loss from analysis of ice draft data taken from a region of the Arctic near the FRAM IV experiment site. The water-ice boundary is modeled as a random distribution of infinite elliptical half-cylinders fixed to a free surface. Burke and Twersky's theory [J. Acoust. Soc. Am. 40, 883-895 (1966) ] of scattering from a single cylindrical protuberance is used to calculate reflectivity from a distribution of scatterers. Individual ice ridge keels are identified from ice draft data resulting in a ridge keel depth distribution function spatially coincident with FRAM IV acoustic propagation paths. The scattering amplitude is weighted by the keel depth distribution function providing an effective ridge keel depth which is used to calculate the under-ice reflectivity. The predicted reflection loss is in good agreement with those inferred from normal-mode methods applied to FRAM IV acoustic field data received on a larger aperture vertical array. C1 SCI APPLICAT INT CORP,MCLEAN,VA 22102. RP WOLF, JW (reprint author), USN,RES LAB,CODE 5120,WASHINGTON,DC 20375, USA. NR 10 TC 6 Z9 7 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD MAR PY 1993 VL 93 IS 3 BP 1329 EP 1334 DI 10.1121/1.405418 PG 6 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KR974 UT WOS:A1993KR97400012 ER PT J AU DWYER, RF AF DWYER, RF TI THE 4TH-ORDER CUMULANT SPECTRUM OF A FILTERED LINEAR FREQUENCY-MODULATED SOURCE IN MOTION SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID RIGID SPHERE; BISPECTRUM; IDENTIFICATION; PERFORMANCE; RESONANCES; PHASE AB The goal of a sonar system is to extract information from received pressure signals emanating from a source. Typical methods employed are usually first-order or second-order functions of the received pressure. This paper develops an analytical method to extract information from the received pressure using the fourth-order cumulant spectrum. The analysis begins with a far-field solution of the wave equation for an acoustic point source in motion. The source is modeled as a filtered linear frequency-modulated signal. The objective is to extract the impulse response of the source characterized by the filter. But due to the motion of the source the response of the extracted filter is modified by the Doppler component. For the given source model, a scaled Doppler component, and both the phase and a scaled magnitude of the Doppler modified filter, can be extracted directly from the fourth-order cumulant spectrum assuming a large time bandwidth product. RP DWYER, RF (reprint author), USN,CTR UNDERSEA WARFARE,NEW LONDON,CT 06320, USA. NR 33 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD MAR PY 1993 VL 93 IS 3 BP 1460 EP 1465 DI 10.1121/1.406803 PG 6 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KR974 UT WOS:A1993KR97400027 ER PT J AU MOFFETT, MB CLAY, WL AF MOFFETT, MB CLAY, WL TI DEMONSTRATION OF THE POWER-HANDLING CAPABILITY OF TERFENOL-D SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Note AB Two barrel-stave flextensional underwater acoustic projectors, one with a lead zirconate titanate (PZT) ring-stack (longitudinal, 33) driver and one with a permanent-magnet-biased Terfenol-D driver, were driven at high power levels. The PZT transducer, driven to its electric-field limit of 390 kV/m rms, produced a source level of 194.7 dB//1muPa.m at 1.56 kHz. The Terfenol-D (Tb0.3Dy0.7Fe1.93) projector power was limited by the stave-attachment method used in the two transducers to 202.9 dB//1muPa.m at 1.48 kHz. RP MOFFETT, MB (reprint author), USN,UNDERSEA WARFARE CTR DETACHMENT,NEW LONDON,CT 06320, USA. NR 6 TC 5 Z9 5 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD MAR PY 1993 VL 93 IS 3 BP 1653 EP 1654 DI 10.1121/1.406800 PG 2 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KR974 UT WOS:A1993KR97400053 ER PT J AU BROWN, JR DUKES, JC BEIDLER, EJ CHEW, V RUFF, J AF BROWN, JR DUKES, JC BEIDLER, EJ CHEW, V RUFF, J TI A COMPARISON OF TEFLON(R) SLIDES AND THE ARMY INSECTICIDE MEASURING SYSTEM FOR SAMPLING AEROSOL CLOUDS SO JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION LA English DT Article AB The effects of method of droplet analysis, reader of Teflon(R) slides and distance on mass median diameter of a Cythion(R) aerosol cloud were examined in the calibration of an Army Insecticide Measuring System (AIMS). There were no significant differences in results among readers and between the AIMS and readers. There were slight but statistically significant differences between readers of Teflon slides and between the methods of analysis. Data supports the manufacturer's recommendation that, for the AIMS, the distance at which an aerosol generator air blast is between 3 and 7 m3 s-1 must be determined. C1 FLORIDA A&M UNIV,JOHN A MULRENNAN SR RES LAB,PANAMA CITY,FL 32405. INDIAN RIVER MOSQUITO CONTROL DIST,VERO BEACH,FL 32961. UNIV FLORIDA,USDA ARS,BIOMETR UNIT,GAINESVILLE,FL 32611. RP BROWN, JR (reprint author), USN,CTR DISEASE VECTOR ECOL & CONTROL,POB 43,NAVAL AIR STN,JACKSONVILLE,FL 32212, USA. NR 5 TC 6 Z9 6 U1 0 U2 0 PU AMER MOSQUITO CONTROL ASSN INC PI LAKE CHARLES PA 707-A EAST PRIEN LAKE ROAD, PO BOX 5416, LAKE CHARLES, LA 70606-5416 SN 8756-971X J9 J AM MOSQUITO CONTR JI J. Am. Mosq. Control Assoc. PD MAR PY 1993 VL 9 IS 1 BP 32 EP 35 PG 4 WC Entomology SC Entomology GA KW008 UT WOS:A1993KW00800007 PM 8468572 ER PT J AU BROWN, JR CHEW, V MELSON, RO AF BROWN, JR CHEW, V MELSON, RO TI MALATHION AEROSOL CLOUD BEHAVIOR IN A COASTAL PLAINS PINE FLATWOODS SO JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION LA English DT Note AB The study examines malathion aerosol cloud behavior in a North Florida pine flatwoods. Droplet mass median diameters (MMD) decreased over distance in both open and pine flatwoods. A sharp decrease in number of aerosol droplets per cm2 occurred between 3.1 and 15.2 m and a gradual decline in droplets per cm2 occurred beyond 15.2 m in both treatment areas. There were no interactions between habitat and distance in regard to MMD or droplets per cm2. Analysis of variance models accounted for 82% of the variability in the MMD data and 79% of the variability in the number of droplets per cm2. C1 UNIV FLORIDA,USDA ARS,BIOMETR UNIT,GAINESVILLE,FL 32611. RP BROWN, JR (reprint author), USN,CTR DIS VECTOR ECOL & CONTROL,POB 43,NAVAL AIR STN,JACKSONVILLE,FL 32212, USA. NR 5 TC 6 Z9 6 U1 0 U2 1 PU AMER MOSQUITO CONTROL ASSN INC PI LAKE CHARLES PA 707-A EAST PRIEN LAKE ROAD, PO BOX 5416, LAKE CHARLES, LA 70606-5416 SN 8756-971X J9 J AM MOSQUITO CONTR JI J. Am. Mosq. Control Assoc. PD MAR PY 1993 VL 9 IS 1 BP 91 EP 93 PG 3 WC Entomology SC Entomology GA KW008 UT WOS:A1993KW00800016 PM 8468581 ER PT J AU CHU, PC AF CHU, PC TI GENERATION OF LOW-FREQUENCY UNSTABLE MODES IN A COUPLED EQUATORIAL TROPOSPHERE AND OCEAN MIXED-LAYER MODEL SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID NINO SOUTHERN OSCILLATION; EL-NINO; INTRASEASONAL OSCILLATIONS; INTERANNUAL OSCILLATIONS; ATMOSPHERE MODELS; TROPICAL OCEAN; PACIFIC OCEAN; ROSSBY WAVES; ENSO; THERMODYNAMICS AB An important issue presented here is the existence of two different types of correlation between time rate of change of sea surface temperature (SST) partial derivative T(s)/partial derivative t and the ocean mixed-layer (OML) depth h(w), depending on the ocean surface conditions. In the tropics, the net heat flux (including radiation budget) at the ocean surface is generally downward and dampens the OML turbulent kinetic energy (TKE). As the ocean surface is under weak wind forcing, the OML shallows to the Monin-Obukhov length scale due to insufficient wind-generated TKE to entrain the deep cool water into the OML. Net heat gain at the ocean surface and very little heat loss at the OML base leads to a warming OML. The thinner the OML, the warmer the OML. Therefore, partial derivative T(s)/partial derivative t and h(w) are negatively correlated; however, as the ocean surface is under strong wind forcing, the OML deepens due to sufficient wind-generated TKE to entrain the deep cool water into OML. The excessive heat loss at the OML base (entrainment heat flux) over net heat gain at the ocean surface leads to a cooling OML. The thicker the OML, the warmer the OML. Therefore, partial derivative T(s)/partial derivative t and h(w) are positively correlated. The shift of positive-only correlation between partial derivative T(s)/partial derivative t and h(w) (as conventionally thought to be), to two-way correlation leads to a new theory about the interannual tropical ocean-atmosphere interaction. To investigate the impact of this new idea on the interannual tropical ocean-atmosphere interaction, an Air-Ocean Surface Heat Exchange (AOSHE) Model, which is a coupled system consisting of the Wind-Induced Surface Heat Exchange (WISHE) Model (Yano and Emanuel) and the Ocean Mixed-Layer (OML) Model (Chu and Garwood) has been developed. The major advantage of the AOSHE model is simple but contains realistic thermodynamics in both ocean and atmosphere. The SST, predicted by the OML model, largely affects the surface evaporation rate, which in turn impacts on the atmosphere. On the other hand, the surface wind stress and buoyancy flux, predicted by the WISHE model, drives the ocean mixed layer. Two different types of low-frequency (interannual) modes are found in the AOSHE model for different ocean surface conditions. For weak surface wind forcing, the low-frequency mode (called AOSHE W-mode) propagates westward with phase speed around 20 cm s-1, and maximum growth rate 2.2 yr-1. The growth rate increases as the wavenumber decreases. The most unstable mode is at the lowest wavenumber with periods of 2-10 years. For strong surface wind forcing, however, the low-frequency mode (called AOSHE S-mode) propagates eastward with phase speed 10-100 cm s-1 and period 1-3 years. This low-frequency mode has strong wavelength selection. The maximum growth rate (nearly 0.5 yr-1) appears at the 3-5 zonal wavenumber. RP CHU, PC (reprint author), USN,POSTGRAD SCH,DEPT OCEANOG,CODE OC CU,MONTEREY,CA 93943, USA. NR 36 TC 8 Z9 9 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0022-4928 J9 J ATMOS SCI JI J. Atmos. Sci. PD MAR 1 PY 1993 VL 50 IS 5 BP 731 EP 749 DI 10.1175/1520-0469(1993)050<0731:GOLFUM>2.0.CO;2 PG 19 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KT136 UT WOS:A1993KT13600004 ER PT J AU KEIZUR, JJ LAVIN, B LEIDICH, RB AF KEIZUR, JJ LAVIN, B LEIDICH, RB TI IATROGENIC URINARY-TRACT INFECTION WITH PSEUDOMONAS-CEPACIA AFTER TRANSRECTAL ULTRASOUND GUIDED NEEDLE-BIOPSY OF THE PROSTATE SO JOURNAL OF UROLOGY LA English DT Article DE URINARY TRACT INFECTION; BIOPSY, NEEDLE; PROSTATIC NEOPLASMS; PSEUDOMONAS INFECTIONS ID TRANS-RECTAL BIOPSY; INTENSIVE-CARE UNIT; CYSTIC-FIBROSIS; POVIDONE-IODINE; BACTEREMIA; PSEUDOBACTEREMIA; CONTAMINATION; COLONIZATION; CIPROFLOXACIN; PROPHYLAXIS AB In response to an unexplained development of Pseudomonas cepacia cystoprostatitis after transrectal ultrasound guided prostate biopsy, a retrospective review of records and biopsy protocol was performed at our institution. Between June 5, 1990 and January 9, 1991 no documented infections occurred in 272 patients undergoing transrectal ultrasound and prostate biopsy. During the next 6 months, however, 9 of 110 patients (8.2%) presented again with infectious symptomatology after transrectal ultrasound guided needle biopsy of the prostate. Culture of a majority of the specimens (67%) yielded P. cepacia. Two additional asymptomatic patients became colonized with P. cepacia. Environmental investigations revealed the ultrasound transmission gel as the source of the contamination. The proposed mechanism of infection was direct prostate or bladder seeding of contaminated transmission gel used to prepare the ultrasound transducer probe. Infections developed in immunocompetent patients despite adequate antimicrobial prophylaxis most likely secondary to underlying bladder outlet obstruction and significant direct inoculum of organisms. We currently recommend use of individualized sterile packets of transmission gel in addition to appropriate antimicrobial prophylaxis and povidone-iodine cleansing enemas when performing transrectal sonographic guided biopsies of the prostate. C1 USN HOSP,DEPT INFECT DIS,OAKLAND,CA. RP KEIZUR, JJ (reprint author), USN HOSP,DEPT UROL,OAKLAND,CA, USA. NR 42 TC 20 Z9 20 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0022-5347 J9 J UROLOGY JI J. Urol. PD MAR PY 1993 VL 149 IS 3 BP 523 EP 526 PG 4 WC Urology & Nephrology SC Urology & Nephrology GA KN821 UT WOS:A1993KN82100023 PM 7679757 ER PT J AU JENSEN, KL GANGULY, AK AF JENSEN, KL GANGULY, AK TI NUMERICAL-SIMULATION OF FIELD-EMISSION FROM SILICON SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 5TH INTERNATIONAL VACUUM MICROELECTRONICS CONF CY JUL 13-17, 1992 CL VIENNA, AUSTRIA SP AMER VACUUM SOC, NATL SCI FDN, USN, OFF NAVAL RES, EUROPEAN OFF, USA, RES & DEV STANDARDIZAT GRP, SIEMENS DEUTSCHLAND, BUNDESMINIST WISSENSCH & FORSCH, OSTERREICH FORSCHUNGSGEMEINSCH, WIENER TOURISMUSVERBAND, SIEMENS OSTERRICH ID RESONANT TUNNELING STRUCTURES; PARTICLE TRAJECTORIES AB A common method for estimating current from semiconductor field emission is to assume that the potential inside the semiconductor is the same as that which would occur if no current were emitted [zero emitted current approximation (ZECA)], and then to use the calculated density at the surface in a standard Fowler-Nordheim analysis familiar from metallic field emission calculations. At high fields, it is obvious that this method fails, as the effect of current is no longer negligible in the calculation of the band bending effects. In this work, we shall present methods for calculating the band bending effects at arbitrary fields in the ZECA model; a comparison of the Wentzel-Kramers-Brillouin and Fowler-Nordheim approaches to field emission for silicon will be compared to the airy function approach of evaluating the transmission coefficient (TC) in the ZECA model; and finally, the limits of ZECA for field emission from silicon will be analyzed by comparing the TC calculations to Wigner distribution function (WDF) simulations performed with full band bending effects and scattering. As anticipated, the ZECA model, whether calculated by the TC or WDF approach, diverges from the full band bending WDF model for high fields. A discussion of this behavior is given in light of the density and current profiles. RP JENSEN, KL (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Jensen, Kevin/I-1269-2015 OI Jensen, Kevin/0000-0001-8644-1680 NR 26 TC 39 Z9 39 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD MAR-APR PY 1993 VL 11 IS 2 BP 371 EP 378 DI 10.1116/1.586863 PG 8 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA KY050 UT WOS:A1993KY05000042 ER PT J AU KRIEBEL, DL DEAN, RG AF KRIEBEL, DL DEAN, RG TI CONVOLUTION METHOD FOR TIME-DEPENDENT BEACH-PROFILE RESPONSE SO JOURNAL OF WATERWAY PORT COASTAL AND OCEAN ENGINEERING-ASCE LA English DT Article ID DUNE EROSION AB A simple analytical solution is presented for approximating the time-dependent beach-profile response to severe storms. This solution is in the form of a convolution integral involving a time-varying erosion-forcing function and an exponential erosion-response function. The erosion-forcing function reflects changes in the nearshore water level and breaking wave height. In this paper, an idealized storm-surge hydrograph is considered from which an analytic solution is obtained for beach and dune erosion associated with severe storms such as hurricanes or northeasters. It is shown that for a given initial beach geometry and sediment size, the peak water level and the incipient breaking wave height determine the maximum erosion potential that would be achieved if the beach were allowed to respond to equilibrium. Because of the assumed exponential erosion rate, beach response obtained from the convolution method is found to lag the erosion forcing in time, and is damped relative to the maximum erosion potential such that only a fraction of the equilibrium response actually occurs. C1 UNIV FLORIDA,DEPT COASTAL & OCEANOG ENGN,GAINESVILLE,FL 32611. RP KRIEBEL, DL (reprint author), USN ACAD,DEPT NAVAL ARCH OCEAN & MARINE ENGN,ANNAPOLIS,MD 21402, USA. NR 17 TC 69 Z9 70 U1 3 U2 12 PU ASCE-AMER SOC CIVIL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-950X J9 J WATERW PORT C-ASCE JI J. Waterw. Port Coast. Ocean Eng.-ASCE PD MAR-APR PY 1993 VL 119 IS 2 BP 204 EP 226 DI 10.1061/(ASCE)0733-950X(1993)119:2(204) PG 23 WC Engineering, Civil; Engineering, Ocean; Water Resources SC Engineering; Water Resources GA KP648 UT WOS:A1993KP64800006 ER PT J AU NGAI, KL PLAZEK, DJ BERO, CA AF NGAI, KL PLAZEK, DJ BERO, CA TI VISCOELASTIC PROPERTIES OF AMORPHOUS POLYMERS .2. ANOMALOUS TEMPERATURE-DEPENDENCE OF THE STEADY-STATE RECOVERABLE COMPLIANCE IN LOW-MOLECULAR-WEIGHT POLYMERS SO MACROMOLECULES LA English DT Article ID POLYSTYRENE MELTS; BEHAVIOR AB Previous study of the viscoelastic behavior of low molecular weight polystyrenes found that the steady-state recoverable compliance, J(e)o, decreased markedly with temperature as the glass temperature, T(g), was approached from above. This anomalous viscoelastic property of polystyrene was explained by a model of coupled molecular motions. Application of the coupling model to low molecular weight poly isobutylene (PIB) leads to the prediction that the anomalous marked decrease of J(e)o will not be observed in PIB. This prediction made for the behavior of polyisobutylene was verified by new creep recovery measurements on a specimen of low molecular weight. The physical reasons for the observation of a breakdown of the Rouse model (modified for undiluted polymers) for low molecular weight polystyrene and the absence of it in polyisobutylene are given. The explanation, based on the coupling model, is illucidated by detailed comparisons between the viscoelastic properties of polystyrene and polyisobutylene. C1 UNIV PITTSBURGH,DEPT MAT SCI & ENGN,PITTSBURGH,PA 15261. RP NGAI, KL (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 22 TC 53 Z9 53 U1 3 U2 14 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD MAR 1 PY 1993 VL 26 IS 5 BP 1065 EP 1071 DI 10.1021/ma00057a029 PG 7 WC Polymer Science SC Polymer Science GA KP770 UT WOS:A1993KP77000029 ER PT J AU LAPOTA, D ROSENBERGER, DE PLATTERRIEGER, MF SELIGMAN, PF AF LAPOTA, D ROSENBERGER, DE PLATTERRIEGER, MF SELIGMAN, PF TI GROWTH AND SURVIVAL OF MYTILUS-EDULIS LARVAE EXPOSED TO LOW-LEVELS OF DIBUTYLTIN AND TRIBUTYLTIN SO MARINE BIOLOGY LA English DT Article ID ANTIFOULING PAINTS; NUCELLA-LAPILLUS; MORTALITY; TOXICITY AB Two studies were conducted to observe effects of dibutyltin (DBT) and tributyltin (TBT) on larvae of Mytilus edulis for an exposure period of 25 d. Endpoints for evaluation were shell growth and mortality measured at 33 d. Larvae were cultured in a new laboratory assay chamber in a recirculating static test. The control, 2, 20, and 200 mug/l DBT-treated populations had mean shell lengths of 527, 523, 417, and 180 mum, respectively. Survival was 1% for the 200 mug/l DBT-treated population, but ranged from 73 to 83% for controls, 2, and 20 mug/l treatments. The no-observed-effect concentration (NOEC) was 2 mug/l for DBT, while the lowest-observed-effect concentration (LOEC) was 20 mug/l. The chronic toxicity value was 6.3 mug/l. In the TBT bioassay, mean shell lengths for the control, 0.006, 0.050, and 0.130 mug/l-treated populations were 565, 437, 385, and 292 mum, respectively. Control survival was 74%, whereas TBT-treated populations survival ranged from 52 to 58%. The NOEC for TBT was 0.006 mug/l TBT and the LOEC was 0.050. A chronic toxicity value of 0.017 mug/l was calculated. The results of this study indicated that the toxicity of DBT was less than that of TBT. It was concluded that shell length was inversely related to exposure level in both DBT and TBT bioassays. In this study, we have observed TBT effects at lower exposure levels in the laboratory than previously reported, and also report the first data for DBT effects on mussel larvae. C1 USN,CTR OCEAN SYST,DIV ENVIRONM SCI,SAN DIEGO,CA 92152. COMP SCI CORP,SAN DIEGO,CA 92110. RP LAPOTA, D (reprint author), USN,CTR OCEAN SYST,MARINE ENVIRONM BRANCH,CODE 522,SAN DIEGO,CA 92152, USA. NR 31 TC 49 Z9 53 U1 3 U2 6 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0025-3162 J9 MAR BIOL JI Mar. Biol. PD MAR PY 1993 VL 115 IS 3 BP 413 EP 419 DI 10.1007/BF00349840 PG 7 WC Marine & Freshwater Biology SC Marine & Freshwater Biology GA KV281 UT WOS:A1993KV28100010 ER PT J AU ARNONE, RA TERRIE, G ORIOL, RA AF ARNONE, RA TERRIE, G ORIOL, RA TI RELATIONSHIPS BETWEEN SURFACE CHLOROPHYLL AND SOLAR IRRADIANCE IN THE NORTH-ATLANTIC SO MARINE TECHNOLOGY SOCIETY JOURNAL LA English DT Article ID BIGHT AB In 1979 the sea surface light distribution at 490 nanometers (nm) in the North Atlantic is shown to have influenced chlorophyll pigment concentration. Results show the importance of solar irradiance on the development of the monthly chlorophyll bloom. Seasonal changes in ocean chlorophyll are believed to be closely associated with the global carbon budget. Photosynthesis, which is responsible for the majority of the oceans' carbon fixation, is stimulated by light (irradiance) and nutrient availability. The photosynthetic process in the surface waters is represented by the chlorophyll pigment concentration that can be obtained from ocean color. The North Atlantic mean monthly chlorophyll pigment concentration is computed from the Coastal Zone Color Scanner at a resolution of 20 km for 1979. Spatially and temporally coincident mean monthly surface irradiance at 490 nm is modeled in hourly steps using atmospheric inputs of (a) aerosol optical depth, (b) ozone optical depth, and (c) percentage of cloud cover. Different ocean regions were analyzed representing the equatorial, Northern Atlantic, Sargasso, African upwelling and U.S. shelf waters. The solar irradiance intensity is shown to be related to chlorophyll pigment concentration in specific ocean regions. Spring and fall chlorophyll pigment blooms develop in regions where a strong seasonal cycle of irradiance is observed. This research illustrates the application of satellite ocean color for characterizing the ocean's biological dependence on solar irradiance and provides an initial understanding of the seasonal carbon distribution at the sea surface. C1 PLANNING SYST INC,SLIDELL,LA. RP ARNONE, RA (reprint author), USN,RES LAB,BAY ST LOUIS,MS, USA. NR 18 TC 1 Z9 1 U1 0 U2 1 PU MARINE TECHNOLOGY SOC INC PI WASHINGTON PA C/O I CLAYION MATTHEWS, 1828 L ST, NW, 9TH FL, WASHINGTON, DC 20036 SN 0025-3324 J9 MAR TECHNOL SOC J JI Mar. Technol. Soc. J. PD SPR PY 1993 VL 27 IS 1 BP 16 EP 23 PG 8 WC Engineering, Ocean; Oceanography SC Engineering; Oceanography GA LH924 UT WOS:A1993LH92400002 ER PT J AU BARAD, H MARTINEZ, AB BOURGEOIS, BS KAMINSKY, EJ AF BARAD, H MARTINEZ, AB BOURGEOIS, BS KAMINSKY, EJ TI ACOUSTICAL BOUNDARY LOCATION THROUGH TEXTURE ANALYSIS OF MULTIBEAM BATHYMETRIC SONAR DATA SO MARINE TECHNOLOGY SOCIETY JOURNAL LA English DT Article ID MODELS AB Texture analysis is performed on multibeam sonar signal returns discriminated angularly by beamforming. A collection of fourteen texture features are computed via co-occurrence matrices and data reduction is then performed using a principal components transformation. Acoustical boundaries (boundaries between regions with homogeneous acoustical properties) are evident from the features. Results indicate that seafloor bottom characteristics can be extracted from these texture features. C1 USN,RES LAB,BAY ST LOUIS,MS. SVERDRUP TECHNOL,BAY ST LOUIS,MS. RP BARAD, H (reprint author), TULANE UNIV,NEW ORLEANS,LA 70118, USA. NR 17 TC 2 Z9 3 U1 0 U2 0 PU MARINE TECHNOLOGY SOC INC PI WASHINGTON PA C/O I CLAYION MATTHEWS, 1828 L ST, NW, 9TH FL, WASHINGTON, DC 20036 SN 0025-3324 J9 MAR TECHNOL SOC J JI Mar. Technol. Soc. J. PD SPR PY 1993 VL 27 IS 1 BP 24 EP 30 PG 7 WC Engineering, Ocean; Oceanography SC Engineering; Oceanography GA LH924 UT WOS:A1993LH92400003 ER PT J AU ROSSIGNOL, G AF ROSSIGNOL, G TI SHIP AND UNMANNED VEHICLE DYNAMICS PROGRAM SO MARINE TECHNOLOGY SOCIETY JOURNAL LA English DT Article AB This paper describes the Ship and Vehicle Dynamics program at the David Taylor Model Basin (DTMB), Carderock Division Headquarters of the Naval Surface Warfare Center. The primary objective of this effort is to assess the effects of environmental conditions and ship motions on all aspects Of unmanned vehicle operations conducted on surface ships. Design and environmental limitations are being determined through sea trials and computer predictions for underwater, surface, and aerial vehicles launched or recovered from surface ships. The program consists of independent projects, each funded by separate sponsors. The results of past sea trials indicate that sea state 4 greatly limits the launch and recovery of some underwater vehicle operations, while current speeds of 3.7 km/hr (2 knots) and higher make all aspects of ter vehicle operations very difficult. ComPuter predictions of ship motions are presently being made to develop some unmanned vehicle launch and recovery envelopes. Accurate definition Of the environmental conditions that limit a particular unmanned system must be determined through a large sample size of launch and recovery operations. RP ROSSIGNOL, G (reprint author), USN,CTR SURFACE WARFARE,BETHESDA,MD 20814, USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU MARINE TECHNOLOGY SOC INC PI WASHINGTON PA C/O I CLAYION MATTHEWS, 1828 L ST, NW, 9TH FL, WASHINGTON, DC 20036 SN 0025-3324 J9 MAR TECHNOL SOC J JI Mar. Technol. Soc. J. PD SPR PY 1993 VL 27 IS 1 BP 55 EP 61 PG 7 WC Engineering, Ocean; Oceanography SC Engineering; Oceanography GA LH924 UT WOS:A1993LH92400006 ER PT J AU CHEMA, JR AF CHEMA, JR TI ARRESTING TAILHOOK - THE PROSECUTION OF SEXUAL HARASSMENT IN THE MILITARY SO MILITARY LAW REVIEW LA English DT Article RP CHEMA, JR (reprint author), USN,OFF NAVAL INTELLIGENCE,WASHINGTON,DC 20350, USA. NR 27 TC 9 Z9 9 U1 0 U2 0 PU JUDGE ADVOCATE GENERALS SCHOOL PI CHARLOTTESVILLE PA US ARMY, CHARLOTTESVILLE, VA 22903-1781 SN 0026-4040 J9 MIL LAW REV JI Milit. Law Rev. PD SPR PY 1993 VL 140 BP 1 EP 64 PG 64 WC Law SC Government & Law GA MC670 UT WOS:A1993MC67000001 ER PT J AU ENAD, JG AMUNDSON, DE WALKER, WE AF ENAD, JG AMUNDSON, DE WALKER, WE TI A REVIEW OF STERNAL WOUND COMPLICATIONS IN A MILITARY HOSPITAL SO MILITARY MEDICINE LA English DT Article AB A retrospective review of sternal wound complications was conducted during a recent 13-month period at the Naval Hospital, San Diego. These complications developed in 5 (3.0%) of 168 patients after they underwent coronary artery bypass with saphenous vein grafts. Three or more of these patients were male, obese, and hypertensive, with a significant smoking history. All these factors have been previously reported to be associated with an increase in the incidence of sternal wound complications. All patients had prolonged postoperative intensive care treatment, and ultimately all patients recovered and were discharged from the hospital. Interestingly, as opposed to other reviews, we were unable to show an association of sternal wound complications with the use of internal mammary artery harvesting. C1 USN,NAVAL HOSP,CLIN INVEST,DEPT CRIT CARE MED,SAN DIEGO,CA 92134. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0026-4075 J9 MIL MED JI Milit. Med. PD MAR PY 1993 VL 158 IS 3 BP 174 EP 176 PG 3 WC Medicine, General & Internal SC General & Internal Medicine GA KR895 UT WOS:A1993KR89500012 PM 8487971 ER PT J AU SENGUPTA, K TEENI, D AF SENGUPTA, K TEENI, D TI COGNITIVE FEEDBACK IN GDSS - IMPROVING CONTROL AND CONVERGENCE SO MIS QUARTERLY LA English DT Article DE GROUP DECISION MAKING; GROUP DECISION SUPPORT SYSTEMS; GROUP PROCESSES; COGNITIVE FEEDBACK ID PROBABILITY-LEARNING TASKS; DECISION-MAKING; OUTCOME FEEDBACK; BEHAVIOR; PERFORMANCE; JUDGMENT; SUPPORT; MODELS AB Cognitive feedback in group decision making is information that provides decision makers with a better understanding of their own decision processes and that of the other group members. It appears to be an effective aid in group decision making. Although it has been suggested as a potential feature of group decision support systems (GDSS), little research has examined its use and impact. This article investigates the effect of computer generated cognitive feedback in computer-supported group decision processes. It views group decision making as a combination of individual and collective activity. The article tests whether cognitive feedback can enhance control over the individual and collective decision making processes and can facilitate the process of convergence among group members. In a laboratory experiment with groups of three decision makers, 15 groups received online cognitive feedback and 15 groups did not. Users receiving cognitive feedback maintained a higher level of control over the decision-making process as their decision strategies converged. This research indicates that (1) developers should include cognitive feedback as an integral part of the GDSS at every level, and (2) they should design the human-computer interaction so there is an intuitive and effective transition across the components of feedback at all levels. Researchers should extend the concepts explored here to other models of conflict that deal with ill-structured decisions, as well as study the impact of cognitive feedback over time. Finally, researchers trying to enhance the capabilities of GDSS should continue examining how to take advantage of the differences between individual, interpersonal, and collective decision making. C1 CASE WESTERN RESERVE UNIV,WEATHERHEAD SCH MANAGEMENT,DEPT MANAGEMENT INFORMAT & DECIS SYST,CLEVELAND,OH 44106. RP SENGUPTA, K (reprint author), USN,POSTGRAD SCH,DEPT ADM SCI,CODE ASSE,MONTEREY,CA 93943, USA. NR 63 TC 39 Z9 39 U1 3 U2 11 PU SOC INFORM MANAGE-MIS RES CENT PI MINNEAPOLIS PA UNIV MINNESOTA-SCH MANAGEMENT 269 19TH AVE SOUTH, MINNEAPOLIS, MN 55455 SN 0276-7783 J9 MIS QUART JI MIS Q. PD MAR PY 1993 VL 17 IS 1 BP 87 EP 113 DI 10.2307/249511 PG 27 WC Computer Science, Information Systems; Information Science & Library Science; Management SC Computer Science; Information Science & Library Science; Business & Economics GA KW530 UT WOS:A1993KW53000007 ER PT J AU BOISE, LH PETRYNIAK, B MAO, XH JUNE, CH WANG, CY LINDSTEN, T BRAVO, R KOVARY, K LEIDEN, JM THOMPSSON, CB AF BOISE, LH PETRYNIAK, B MAO, XH JUNE, CH WANG, CY LINDSTEN, T BRAVO, R KOVARY, K LEIDEN, JM THOMPSSON, CB TI THE NFAT-1 DNA-BINDING COMPLEX IN ACTIVATED T-CELLS CONTAINS FRA-1 AND JUNB SO MOLECULAR AND CELLULAR BIOLOGY LA English DT Article ID LYMPHOCYTE-SPECIFIC FACTORS; C-JUN; INTERLEUKIN-2 GENE; ANTIGEN RECEPTOR; PROTO-ONCOGENE; CYCLOSPORINE-A; TRANSCRIPTIONAL ACTIVATION; MOUSE FIBROBLASTS; GROWTH-FACTORS; FOS PROTEINS AB Activation of T cells induces transcription of the interleukin-2 (1L-2) gene. IL-2 expression is regulated through the binding of transcription factors to multiple sites within the IL-2 enhancer. One such cis-acting element within the IL-2 enhancer is the NFAT-1 (nuclear factor of activated T cells) binding site. NFAT-1 binding activity is absent in resting cells but is induced upon T-cell activation. The induction of NFAT-1 binding activity can be inhibited by cyclosporin A, potentially accounting for the ability of cyclosporin A to inhibit IL-2 production by T cells. We have previously reported that the NFAT-1 binding complex is composed of at least two proteins and that the 5' portion of the NFAT-1 sequence acts as a binding site for one or more proteins from the Ets family of transcription factors. We now report that the 3' portion of the NFAT-1 sequence contains a variant AP-1 binding site. NFAT-1 binding can be specifically inhibited by oligonucleotides containing a consensus AP-1 site. Moreover, mutation of the AP-1 site at the 3' end of the NFAT-1 sequence inhibits both NFAT-1 binding and the ability of the NFAT-1 binding site to activate expression from a reporter plasmid upon T-cell activation. Since AP-1 sites bind dimeric protein complexes composed of individual members of the Fos and Jun families of transcription factors, we used antibodies specific for individual Fos and Jun family members to determine whether they are present in the NFAT-1 binding complex. These experiments demonstrated that the NFAT-1 binding complex contains JunB and Fra-1 proteins. Northern (RNA) blot analyses demonstrate that both fra-1 and junB mRNAs are induced upon T-cell activation, although fra-1 mRNA is present even in quiescent T cells. Of interest, jun B is not expressed in quiescent T cells, and it is induced with kinetics that are similar to those for the induction of IL-2 mRNA expression. Taken together, these results suggested that the JunB-Fra-1 heterodimer is the inducible nuclear component of the NFAT-1 binding activity and that JunB expression regulates the formation of the heterodimer. In addition, these data indicated that specific heterodimers of Fos and Jun family members may have selective roles in the induction of transcription during cellular activation. C1 HOWARD HUGHES MED INST,COCONUT GROVE,FL 33133. BRISTOL MYERS SQUIBB PHARMACEUT RES INST,PRINCETON,NJ 08543. UNIV MICHIGAN,MED CTR,DEPT MICROBIOL IMMUNOL,ANN ARBOR,MI 48109. UNIV MICHIGAN,MED CTR,DEPT PATHOL,ANN ARBOR,MI 48109. UNIV MICHIGAN,MED CTR,DEPT INTERNAL MED,ANN ARBOR,MI 48109. USN,MED RES INST,IMMUNE CELL BIOL PROGRAM,BETHESDA,MD 20814. UNIV CHICAGO,DEPT MED,CHICAGO,IL 60637. UNIV CHICAGO,DEPT PATHOL,CHICAGO,IL 60637. RI Kovary, Karla/E-3979-2013 NR 42 TC 219 Z9 220 U1 0 U2 1 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0270-7306 J9 MOL CELL BIOL JI Mol. Cell. Biol. PD MAR PY 1993 VL 13 IS 3 BP 1911 EP 1919 PG 9 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN579 UT WOS:A1993KN57900066 PM 8441422 ER PT J AU CHANG, CP YEH, TC CHEN, JM AF CHANG, CP YEH, TC CHEN, JM TI EFFECTS OF TERRAIN ON THE SURFACE-STRUCTURE OF TYPHOONS OVER TAIWAN SO MONTHLY WEATHER REVIEW LA English DT Article AB The island of Taiwan is situated in the main path of western North Pacific typhoons. Its dominant central mountain range (CMR), with a horizontal scale comparable to the radius of a typhoon, often produces significant distortions in the typhoon circulation. A 20-year dataset from 22 surface stations is used to describe the effects of the Taiwan terrain on the surface structure of typhoons. Empirical orthogonal function analysis on the pressure field is used to identify the primary structure modes. The first mode is a uniform-sign anomaly pattern portraying the decrease in pressure as a typhoon is approaching. The second mode represents the strong terrain-induced west-east pressure gradient that is normal to the main axis of the CMR. The third mode results mainly from the west-east pressure gradient arising from the relative location of the typhoon center to the east or west of Taiwan, but it also contains a weak south-north pressure gradient that can be attributed to the terrain. A regression technique is then used to determine the surface wind, temperature, relative humidity, and hourly rainfall associated with each pressure mode. In all cases, these fields are consistent, showing the effects of the terrain blocking or deflection and their consequent ascending and descending motions. The relative importance of each mode depends strongly on the location of the typhoon center. No dependence on the direction or speed of motion is discernible when all cases are considered. When different, persistently smooth tracks are identified, the variations due to motion direction can be recognized because the terrain effect is affected by the mean steering flow. Only two types of smooth tracks that represent clearly different steering flows intersect in an area. At the intersection, a subsequent difference in storm structure over Taiwan exists that can be explained by the difference in the steering flows associated with the two track types. The leeside secondary low that was often observed on the west coast of Taiwan is found to consist of at least two basic modes. It develops only when the typhoon center is in southeastern Taiwan or an ocean area to the east-southeast. The observed scale of this low is significantly smaller than that which can be produced by an interaction of the mean steering flow and the CMR. This smaller scale is due to a local buildup of the surface pressure south of the lee vortex, which results from the against-mountain return flow of the cyclonic circulation. RP CHANG, CP (reprint author), USN,POSTGRAD SCH,DEPT METEOROL,CODE MR-CP,MONTEREY,CA 93941, USA. NR 11 TC 50 Z9 50 U1 0 U2 3 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0027-0644 J9 MON WEATHER REV JI Mon. Weather Rev. PD MAR PY 1993 VL 121 IS 3 BP 734 EP 752 DI 10.1175/1520-0493(1993)121<0734:EOTOTS>2.0.CO;2 PG 19 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KQ093 UT WOS:A1993KQ09300009 ER PT J AU LEE, GF FEDDERLY, JJ LEE, JD AF LEE, GF FEDDERLY, JJ LEE, JD TI FOURIER-TRANSFORM INFRARED AND RESONANCE APPARATUS FOR QC OF SOUND AND VIBRATION DAMPING MATERIALS SO NAVAL ENGINEERS JOURNAL LA English DT Article AB Sound and vibration damping materials are used on ships, aircraft, and space structures. The damping properties of a given damping material are a function of mix ratio, filler concentration, curing conditions, etc. There is a growing need to develop quality control methods for these materials and to bring the required instrumentation into the factory and shipyard environment. This paper describes two QC methods that have been developed for use in a factory or shipyard. These methods utilize Fourier Transform Infra-Red (FTIR) spectroscopy and a custom-made resonance apparatus (RA) for measuring dynamic mechanical properties. The two sets of instrumentation and the special packaging of them for use in a harsh environment are described. The instruments are computer driven and software was written to automate data collection and analysis. The FTIR method determines mix ratio of the reactive components of the damping material and the RA method measures the dynamic shear modulus and loss factor, which is a direct measure of the damping properties. The use of these methods is demonstrated for a typical damping material. Samples were made with a wide range of mix ratios for the reactive components and the properties of the materials were measured. RP LEE, GF (reprint author), USN,CTR SURFACE WARFARE,POLYMER SCI GRP,SILVER SPRING,MD 20903, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC NAVAL ENG INC PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314-3458 SN 0028-1425 J9 NAV ENG J JI Nav. Eng. J. PD MAR PY 1993 VL 105 IS 2 BP 59 EP 65 PG 7 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA LU426 UT WOS:A1993LU42600003 ER PT J AU CIARULA, TA NERADKA, VF AF CIARULA, TA NERADKA, VF TI TOMAHAWK NITROGEN PRESSURIZATION MAINTENANCE - WHY SO NAVAL ENGINEERS JOURNAL LA English DT Article AB This paper discusses the data that were recorded during a three-month accelerated humidity test of two Tomahawk all-up rounds (AURs), one pressurized with dry nitrogen in accordance with the current practice, and the other left unpressurized. Temperature and humidity were recorded inside the canisters and missiles. Data analysis consisted of psychrometric calculations to determine the moisture intrusion into these missiles during the test. The work was carried out in support of a technical effort directed at changing the storage and stowage environmental protection of the Tomahawk missile. RP CIARULA, TA (reprint author), USN,AIR SYST COMMAND,PMA 205,WASHINGTON,DC 20350, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC NAVAL ENG INC PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314-3458 SN 0028-1425 J9 NAV ENG J JI Nav. Eng. J. PD MAR PY 1993 VL 105 IS 2 BP 66 EP 68 PG 3 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA LU426 UT WOS:A1993LU42600004 ER PT J AU PELAEZ, MYE AF PELAEZ, MYE TI PREPARING TO MEET THE CHALLENGES OF THE NEXT CENTURY SO NAVAL ENGINEERS JOURNAL LA English DT Editorial Material RP PELAEZ, MYE (reprint author), USN,WASHINGTON,DC 20350, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC NAVAL ENG INC PI ALEXANDRIA PA 1452 DUKE STREET, ALEXANDRIA, VA 22314-3458 SN 0028-1425 J9 NAV ENG J JI Nav. Eng. J. PD MAR PY 1993 VL 105 IS 2 BP 90 EP 91 PG 2 WC Engineering, Marine; Engineering, Civil; Oceanography SC Engineering; Oceanography GA LU426 UT WOS:A1993LU42600006 ER PT J AU DEWOLFE, DD STEVENS, JG WOOD, RK AF DEWOLFE, DD STEVENS, JG WOOD, RK TI SETTING MILITARY REENLISTMENT BONUSES SO NAVAL RESEARCH LOGISTICS LA English DT Article ID INTEGER AB The United States military frequently has difficulty retaining enlisted personnel beyond their initial enlistment. A bonus program within each service, called a Selective Reenlistment Bonus (SRB) program, seeks to enhance reenlistments and thus reduce personnel shortages in critical military occupational specialties (MOSs). The amount of bonus is set by assigning ''SRB multipliers'' to each MOS. We develop a nonlinear integer program to select multipliers which minimize a function of deviations from desired reenlistment targets. A Lagrangian relaxation of a linearized version of the integer program is used to obtain lower bounds and feasible solutions. The best feasible solution, discovered in a coordinate search of the Lagrangian function, is heuristically improved by apportioning unexpended funds. For large problems a heuristic variable reduction is employed to speed model solution. U.S. Army data and requirements for FY87 yield a 0-1 integer program with 12,992 binary variables and 273 constraints, which is solved within 0.00002% of optimality on an IBM 3033AP in less than 1.7 seconds. More general models with up to 463,000 binary variables are solved, on average, to within 0.009% of optimality in less than 1.8 minutes. The U.S. Marine Corps has used a simpler version of this model since 1986. RP DEWOLFE, DD (reprint author), USN,POSTGRAD SCH,DEPT OPERAT RES,MONTEREY,CA 93943, USA. NR 13 TC 7 Z9 7 U1 0 U2 1 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0894-069X J9 NAV RES LOG JI Nav. Res. Logist. PD MAR PY 1993 VL 40 IS 2 BP 143 EP 160 DI 10.1002/1520-6750(199303)40:2<143::AID-NAV3220400202>3.0.CO;2-6 PG 18 WC Operations Research & Management Science SC Operations Research & Management Science GA KM624 UT WOS:A1993KM62400001 ER PT J AU CHAKRABARTI, SK COTTER, DC PALO, P AF CHAKRABARTI, SK COTTER, DC PALO, P TI SHEAR CURRENT FORCES ON A SUBMERGED CYLINDER SO OCEAN ENGINEERING LA English DT Article ID FLOW AB A test was performed to determine the effect of a two-dimensional shear current on a submerged horizontal circular cylinder. Three types of current were developed: positive shear, no shear (uniform) and negative shear. The test cylinder was mounted at three different depths with respect to the free surface. During each test run, the inline and vertical loads on the cylinder, the pressure around the circumference of the cylinder and the current velocity were recorded. The analysis showed that the steady inline loads on the cylinder were strongly dependent on the proximity to the free surface in uniform flow but relatively independent of the elevation in shear flows. The steady vertical loads were large only when the cylinder was near the surface. Pressure profiles around the cylinders are presented for the cylinder at mid-depth and near the surface. Profiles for all shears were relatively symmetric at mid-depth. NeaT the surface, the pressure on the upper front quadrant of the cylinder tended to increase (become more positive), and the pressure on the lower front quadrant tended to decrease (become more negative) . The pressure increase was the greatest for the positive shear, and the pressure decrease was the greatest for the negative shear. C1 USN,CIVIL ENGN LAB,PORT HUENEME,CA. RP CHAKRABARTI, SK (reprint author), CHICAGO BRIDGE & IRON CO,PLAINFIELD,IL 60544, USA. NR 13 TC 2 Z9 2 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0029-8018 J9 OCEAN ENG JI Ocean Eng. PD MAR PY 1993 VL 20 IS 2 BP 135 EP 162 DI 10.1016/0029-8018(93)90031-C PG 28 WC Engineering, Marine; Engineering, Civil; Engineering, Ocean; Oceanography SC Engineering; Oceanography GA KM315 UT WOS:A1993KM31500003 ER PT J AU DAGENAIS, DM KOO, KP BUCHOLTZ, F AF DAGENAIS, DM KOO, KP BUCHOLTZ, F TI EFFECTS OF PARASITIC FABRY-PEROT CAVITIES IN FIBEROPTIC INTERFEROMETRIC SENSORS SO OPTICS LETTERS LA English DT Article AB We show theoretical and experimental evidence for increased quadrature point fluctuations and amplitude and phase noise in interferometric fiber sensors owing to the presence of parasitic Fabry-Perot cavities. We demonstrate greater than 2 orders of magnitude reduction of such effects. C1 SFA INC,LANDOVER,MD 20785. RP DAGENAIS, DM (reprint author), USN,RES LAB,DIV OPT SCI,CODE 5670,WASHINGTON,DC 20375, USA. NR 6 TC 6 Z9 6 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD MAR 1 PY 1993 VL 18 IS 5 BP 388 EP 390 DI 10.1364/OL.18.000388 PG 3 WC Optics SC Optics GA KN040 UT WOS:A1993KN04000022 PM 19802145 ER PT J AU ESTEP, L ARNONE, R AF ESTEP, L ARNONE, R TI CORRELATION OF CZCS SURFACE KS WITH KS DERIVED FROM SECCHI DISK SO PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING LA English DT Article; Proceedings Paper CT 1st Thematic Conf on Remote Sensing for Marine and Coastal Environments CY JUN 15-17, 1992 CL NEW ORLEANS, LA SP ENVIRONM RES INST MICHIGAN, MARINE SPILL RESPONSE CORP ID REMOTE AB As part of a validation procedure for Coastal Zone Color Scanner (CZCS) determined downwelling diffuse attenuation coefficients, or k values, Secchi disk derived ks were compared to CZCS computed ks. The preliminary results of such a comparison exhibited that the Secchi derived ks were consistently higher than the czcs ks. The objective of this writing is to explore the reasons for this discrepancy and suggest causes to explain and interpret these results. RP ESTEP, L (reprint author), NAVAL RES LAB,BAY ST LOUIS,MS 39529, USA. NR 20 TC 4 Z9 4 U1 0 U2 0 PU AMER SOC PHOTOGRAMMETRY PI BETHESDA PA 5410 GROSVENOR LANE SUITE 210, BETHESDA, MD 20814-2160 SN 0099-1112 J9 PHOTOGRAMM ENG REM S JI Photogramm. Eng. Remote Sens. PD MAR PY 1993 VL 59 IS 3 BP 345 EP 350 PG 6 WC Geography, Physical; Geosciences, Multidisciplinary; Remote Sensing; Imaging Science & Photographic Technology SC Physical Geography; Geology; Remote Sensing; Imaging Science & Photographic Technology GA LC775 UT WOS:A1993LC77500006 ER PT J AU ELTON, RC AF ELTON, RC TI MISDIRECTED CREDIT SO PHOTONICS SPECTRA LA English DT Letter RP ELTON, RC (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LAURIN PUBL CO INC PI PITTSFIELD PA BERKSHIRE COMMON PO BOX 1146, PITTSFIELD, MA 01202 SN 0731-1230 J9 PHOTON SPECTRA JI Photon. Spect. PD MAR PY 1993 VL 27 IS 3 BP 10 EP 10 PG 1 WC Optics SC Optics GA KR119 UT WOS:A1993KR11900003 ER PT J AU KAFAFI, ZH AF KAFAFI, ZH TI FULLERENES MEET PHOTONICS SO PHOTONICS SPECTRA LA English DT Article RP KAFAFI, ZH (reprint author), USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU LAURIN PUBL CO INC PI PITTSFIELD PA BERKSHIRE COMMON PO BOX 1146, PITTSFIELD, MA 01202 SN 0731-1230 J9 PHOTON SPECTRA JI Photon. Spect. PD MAR PY 1993 VL 27 IS 3 BP 76 EP 78 PG 3 WC Optics SC Optics GA KR119 UT WOS:A1993KR11900040 ER PT J AU COLBERT, TM WEXLER, BL AF COLBERT, TM WEXLER, BL TI EFFECTS OF NONUNIFORM REFLECTIVE BOUNDARIES AND LINE COMPETITION ON RADIATION TRAPPING SO PHYSICAL REVIEW A LA English DT Article ID HG RESONANCE LINE; TRANSPORT; THALLIUM; SODIUM AB We develop a radiation diffusion equation for an infinite slab geometry where the slab may have different reflectivities on either surface, and for conditions where complete frequency redistribution is valid. Additionally we consider the effect of two competing trapped transitions. Specifically we consider the emission from the thallium 7(2)S1/2 state to either the 6(2)P3/2 (metastable state) at 535 nm or 6(2)P1/2 (ground state) at 378 nm. High densities of the long-lived metastable level can be produced in a number of ways. The escape factors (which are simply related to the decay rates) and excited-atom spatial profiles are calculated for a variety of conditions for the first several natural modes of the system. The spatial modes for this system are asymmetric. The asymmetry can vary dramatically with only small changes in either of the two lower-state densities. The correct description of the spatial modes is critical in order to determine the overall excited-atom profile accurately. For the simpler systems (i.e., a single transition and nonreflective boundaries) usually considered the mode profiles do not change appreciably as the optical depth is changed (given conditions of high optical depth and a single-line broadening mechanism). The fundamental mode decay rate is shown for a fixed metastable-state density as a function of the ground-state density. The dependence of the fundamental mode escape factor for the first resonance transition on the optical depth (or ground-state density) is in general more complicated than for the case of a single trapped transition. For conditions considered here a simple power rule cannot be used to scale the decay rates as a function of line-center optical depth. Also shown is the fundamental mode escape factor as a function of buffer gas pressure for fixed ground- and metastable-state densities. The calculations presented here allow us to model the narrow-bandwidth thallium fluorescence filter. This filter will be discussed in more detail in a separate paper. A thorough review of atomic resonance filters was done by Gelbwachs [IEEE J. Quantum Electron. 24, 1266 (1988)]. We have considered a much broader range of ground- and metastable-state densities than would be practical for efficient filter operation. This is done to illustrate several aspects of the radiation trapping processes. C1 USN,RES LAB,WASHINGTON,DC 20375. NR 37 TC 7 Z9 7 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 MAR PY 1993 VL 47 IS 3 BP 2156 EP 2168 DI 10.1103/PhysRevA.47.2156 PG 13 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV980 UT WOS:A1993KV98000064 ER PT J AU COLMENERO, J ALEGRIA, A TELLERIA, I NGAI, KL AF COLMENERO, J ALEGRIA, A TELLERIA, I NGAI, KL TI EXTENDED KRONMULLER MODEL FOR COOPERATIVE RELAXATIONS IN METALLIC GLASSES SO PHYSICAL REVIEW B LA English DT Article ID FERROMAGNETIC AMORPHOUS-ALLOYS; IRREVERSIBLE STRUCTURAL RELAXATIONS; CORRELATED SYSTEMS; DEBYE RELAXATION AB An atomic model previously proposed by Kronmuller to explain the reversible magnetic after-effect in ferromagnetic amorphous alloys has been extended following the ideas of the coupling scheme for treating relaxation processes in complex systems. In the extended model the elementary atomic mechanism for the relaxation is assumed to be the activated rearrangements of atom pairs proposed by Kronmuller. Correlations among the relaxing units are introduced through the coupling ideas. Due to the inherent randomness of the amorphous metallic alloys, a distribution of the relaxation times corresponding to the elementary processes is also considered. However, the nonexponential character of the relaxation is determined to be mainly due to the correlation. Beyond the stretched-exponential function, the proposed model can explain more experimental facts. In this work we have utilized this model to explain the trend of the change of the relaxation parameters with the metalloid content in ferromagnetic alloys. Moreover we have reanalyzed previously reported data corresponding to the relaxation of magnetization work. From this analysis we have obtained the distribution function of elementary microscopic processes. The distribution function obtained is nearly symmetric and Gaussian-like, as expected from the randomness assumed to exist in amorphous metallic alloys. C1 USN, RES LAB, WASHINGTON, DC 20375 USA. RP COLMENERO, J (reprint author), UNIV BASQUE COUNTRY, FAC QUIM, DEPT FIS MAT, EUSKAL HERRIKO UNIBERTSITATEA, APARTADO 1072, E-20080 SAN SEBASTIAN, SPAIN. RI Colmenero, Juan/G-8725-2015; ALEGRIA, ANGEL/H-1035-2015 OI Colmenero, Juan/0000-0002-2440-4953; ALEGRIA, ANGEL/0000-0001-6125-8214 NR 22 TC 3 Z9 3 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD MAR 1 PY 1993 VL 47 IS 9 BP 5041 EP 5046 DI 10.1103/PhysRevB.47.5041 PG 6 WC Physics, Condensed Matter SC Physics GA KQ099 UT WOS:A1993KQ09900029 ER PT J AU WHITE, CT ROBERTSON, DH MINTMIRE, JW AF WHITE, CT ROBERTSON, DH MINTMIRE, JW TI HELICAL AND ROTATIONAL SYMMETRIES OF NANOSCALE GRAPHITIC TUBULES SO PHYSICAL REVIEW B LA English DT Note AB We show how all extended graphitic tubules constructed by rolling up a single graphite sheet can be defined in terms of their helical and rotational symmetries. Specification of these symmetries is practically mandatory in all but the simplest calculations of tubule properties as a function of radius and structure. We also report results of a tight-binding study implemented by using these symmetries. This study shows that independent of their helicity.the larger-diameter, moderate-band-gap semiconducting tubules all have band gaps given approximately by E(g) = \V0\(d0/R(T)), where R(T) is the tubule radius and V0 is the hopping matrix element between nearest-neighboring 2p orbitals oriented normal to the tubule surface and centered on carbon atoms separated by a distance do along this surface. In addition, we show that all tubules constructed by rolling up the graphite sheet can be labeled in a fashion familiar in the description of helical chain polymers with translational symmetry. RP WHITE, CT (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. OI Mintmire, John/0000-0002-6551-0349 NR 13 TC 520 Z9 530 U1 2 U2 23 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 MAR 1 PY 1993 VL 47 IS 9 BP 5485 EP 5488 DI 10.1103/PhysRevB.47.5485 PG 4 WC Physics, Condensed Matter SC Physics GA KQ099 UT WOS:A1993KQ09900089 ER PT J AU BERKLEY, DD SKELTON, EF MOULTON, NE OSOFSKY, MS LECHTER, WT BROWNING, VM LIEBENBERG, DH AF BERKLEY, DD SKELTON, EF MOULTON, NE OSOFSKY, MS LECHTER, WT BROWNING, VM LIEBENBERG, DH TI PRESSURE-DEPENDENCE OF THE SUPERCONDUCTING TRANSITION-TEMPERATURE IN SINGLE-CRYSTALS OF TL2BA2CA2CU3O10-X SO PHYSICAL REVIEW B LA English DT Note ID TC; GPA AB The pressure dependence of the superconducting transition temperature, T(c)(P), has been measured in single crystals of Tl2Ba2Ca2Cu3O10-x. In two overdoped samples, T(c)(P) is observed to increase from 116 K at atmospheric pressure to 131.8+/-0.5 K at 7 GPa. We believe this is the highest T(c) reported to date. The initial slope, dT(c)/dP, was measured to be 4.8+/-0.3 K/GPa. For samples with T(c)'s at atmospheric pressure approaching the reported optimum value for this compound of 125 K, the effect of pressure is reduced. These results are discussed in terms of existing theoretical models. C1 OFF NAVAL RES,ARLINGTON,VA 22217. RP BERKLEY, DD (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Osofsky, Michael/A-1050-2010 NR 20 TC 29 Z9 29 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 MAR 1 PY 1993 VL 47 IS 9 BP 5524 EP 5527 DI 10.1103/PhysRevB.47.5524 PG 4 WC Physics, Condensed Matter SC Physics GA KQ099 UT WOS:A1993KQ09900099 ER PT J AU REEVES, ME DITMARS, DA WOLF, SA VANDERAH, TA KRESIN, VZ AF REEVES, ME DITMARS, DA WOLF, SA VANDERAH, TA KRESIN, VZ TI EVIDENCE FOR STRONG ELECTRON-PHONON COUPLING FROM THE SPECIFIC-HEAT OF YBA2CU3O7-DELTA SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TC SUPERCONDUCTORS; UPPER CRITICAL-FIELD; HIGH-TEMPERATURE; SINGLE-CRYSTAL; ANISOTROPY; PARAMETERS; DIFFUSION; LATTICE AB We report precise measurements of the relative enthalpy of polycrystalline YBa2Cu3O7-delta at high temperatures (273 K < T < 700 K). From these data, we determine the lattice and electronic contributions to the specific heat. We find that the specific heat of the charge carriers follows the temperature dependence of a Fermi liquid with a Sommerfeld constant of 25+/-3 mJ/mole K2. By comparing our data to measurements made at low temperatures, we determine that the electron-phonon coupling is strong in YBa2Cu3O7-delta and adequate to account for the high transition temperature. C1 NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. USN,CTR WEAP,CHINA LAKE,CA 93555. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP REEVES, ME (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Wolf, Stuart/A-7513-2009 NR 39 TC 30 Z9 30 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 MAR 1 PY 1993 VL 47 IS 10 BP 6065 EP 6068 DI 10.1103/PhysRevB.47.6065 PG 4 WC Physics, Condensed Matter SC Physics GA KT879 UT WOS:A1993KT87900057 ER PT J AU RICE, JK MCCAULEY, SW BARONAVSKI, AP HORWITZ, JS CHRISEY, DB AF RICE, JK MCCAULEY, SW BARONAVSKI, AP HORWITZ, JS CHRISEY, DB TI PROBING THIN-FILM YBA2CU3O7-DELTA SUPERCONDUCTORS BY 2ND-HARMONIC GENERATION WITH THE USE OF FEMTOSECOND LASER-PULSES SO PHYSICAL REVIEW B LA English DT Article ID 2ND HARMONIC-GENERATION; OXYGEN STOICHIOMETRY; TRANSITION; SURFACE; DEPOSITION; REFLECTION; ADSORPTION; PRESSURE; SPECTRA AB High-temperature superconducting thin films of YBa2Cu3O7-delta are examined by measuring the second-harmonic generated (SHG) signal from an incident 60-fs laser pulse of 2.0 eV (620 nm) in air at room temperature. As oxygen stoichiometry is varied (0.00 < delta < 0.50), large changes in the SHG intensity are observed. The oxygen content of the films is independently determined by measuring (i) the c-axis lattice parameter derived from x-ray diffraction and (ii) the stoichiometry of the films determined by elastic backscattering spectrometry. We report a negative correlation of the SHG intensity with the c-axis parameter indicating that a known compression of the c axis leads to a larger SHG signal. An additional experiment in which the SHG intensity is monitored as a function of temperature (300-20 K) in vacuum is performed. A gradual increase of approximately 50% in the SHG intensity is observed as the temperature is lowered, which can also be correlated to a decrease in the length of the c-axis parameter. Other experiments including rotation anisotropy and polarization of the incident and analyzer beams are also discussed. C1 USN, RES LAB, DIV CONDENSED MATTER & RADIAT SCI, WASHINGTON, DC 20375 USA. CALIF STATE POLYTECH UNIV POMONA, DEPT PHYS, POMONA, CA 91768 USA. RP RICE, JK (reprint author), USN, RES LAB, DIV CHEM, CODE 6111, WASHINGTON, DC 20375 USA. NR 36 TC 7 Z9 7 U1 1 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD MAR 1 PY 1993 VL 47 IS 10 BP 6086 EP 6094 DI 10.1103/PhysRevB.47.6086 PG 9 WC Physics, Condensed Matter SC Physics GA KT879 UT WOS:A1993KT87900060 ER PT J AU SIHVER, L TSAO, CH SILBERBERG, R KANAI, T BARGHOUTY, AF AF SIHVER, L TSAO, CH SILBERBERG, R KANAI, T BARGHOUTY, AF TI TOTAL REACTION AND PARTIAL CROSS-SECTION CALCULATIONS IN PROTON-NUCLEUS (ZT-LESS-THAN-OR-EQUAL-TO-26) AND NUCLEUS-NUCLEUS REACTIONS (ZP AND ZT-LESS-THAN-OR-EQUAL-TO-26) SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; C-12 IONS; FRAGMENTATION; FACTORIZATION; INTERMEDIATE; SPALLATION; TARGETS; NE-20; DEPTH; WATER AB We have developed semiempirical total reaction cross section formulas for proton-nucleus (with Z(t) less-than-or-equal-to 26) and nucleus-nucleus (with Z(p) and Z(t) less-than-or-equal-to 26) reactions. These formulas apply for incident energies above almost-equal-to 15 MeV and almost-equal-to 100 MeV/nucleon, respectively. We have also constructed a procedure for calculating the projectile-fragment production cross sections, by scaling semiempirical proton-nucleus partial cross section systematics. The scaling is done by a scaling parameter, which is based on a Bradt-Peters-type law and also takes advantage of the weak-factorization property of projectile fragments. All products from the Z of the projectile down to Z = 2 can be calculated. The agreement between the calculated partial cross sections and the experimental data is better than all earlier published results. C1 UNIV SPACE RES ASSOC,WASHINGTON,DC 20024. USN,RES LAB,WASHINGTON,DC 20375. ROANOKE COLL,DEPT PHYS,SALEM,VA 24153. RP SIHVER, L (reprint author), NATL INST RADIOL SCI,ANAGAWA 4-9-1,INAGE KU,CHIBA 263,JAPAN. NR 37 TC 125 Z9 128 U1 0 U2 7 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD MAR PY 1993 VL 47 IS 3 BP 1225 EP 1236 DI 10.1103/PhysRevC.47.1225 PG 12 WC Physics, Nuclear SC Physics GA KT881 UT WOS:A1993KT88100035 ER PT J AU TSAO, CH SILBERBERG, R BARGHOUTY, AF SIHVER, L KANAI, T AF TSAO, CH SILBERBERG, R BARGHOUTY, AF SIHVER, L KANAI, T TI SCALING ALGORITHM TO CALCULATE HEAVY-ION SPALLATION CROSS-SECTIONS SO PHYSICAL REVIEW C LA English DT Article ID NUCLEUS-NUCLEUS COLLISIONS; HIGH-ENERGY; FRAGMENTATION; HYDROGEN; FE-56; TARGETS; HELIUM; CARBON AB An algorithm to scale nucleus-nucleus collision projectile-fragment cross sections from the corresponding proton-nucleus ones is developed. The algorithm takes advantage of the weak factorization property of projectile fragments. It uses the participant-spectator model and Glauber scattering theory and approximates the collision's sum rules. The algorithm is sufficiently robust over the energy range 0.1-2.0 GeV/nucleon with no restrictions on the sizes of target (apart from the special case of He-4) nor projectile nuclei. It offers marked improvement over our earlier semiempirical scaling procedure. Using measured and simulated cross sections for comparison, the estimated systematic uncertainty of the algorithm averaged over this energy range is approximately 15%. C1 UNIV SPACE RES ASSOC,WASHINGTON,DC 20024. ROANOKE COLL,DEPT PHYS,SALEM,VA 24153. NIRS,INST RADIOL SCI,INAGE KU,CHIBA 263,JAPAN. RP TSAO, CH (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 7654,WASHINGTON,DC 20375, USA. NR 27 TC 47 Z9 49 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD MAR PY 1993 VL 47 IS 3 BP 1257 EP 1262 DI 10.1103/PhysRevC.47.1257 PG 6 WC Physics, Nuclear SC Physics GA KT881 UT WOS:A1993KT88100039 ER PT J AU WHITNEY, KG PULSIFER, PE AF WHITNEY, KG PULSIFER, PE TI PLASMA CONDITIONS FOR NON-MAXWELLIAN ELECTRON DISTRIBUTIONS IN HIGH-CURRENT DISCHARGES AND LASER-PRODUCED PLASMAS SO PHYSICAL REVIEW E LA English DT Article ID X-RAY-EMISSION; ANOMALOUS RESISTIVITY; ARRAY IMPLOSIONS; HEAT-TRANSPORT; Z-PINCH; FUSION AB Results from the standard quasilinear theory of ion-acoustic and Langmuir plasma microturbulence are incorporated into the kinetic theory of the electron distribution function. The theory is then applied to high current discharges and laser-produced plasmas, where either the current flow or the nonlinear laser-light absorption acts, respectively, as the energy source for the microturbulence. More specifically, the theory is applied to a selenium plasma, whose charge state is determined under conditions of collisional-radiative equilibrium, and plasma conditions are found under which microturbulence strongly influences the electron kinetics. In selenium, we show that this influence extends over a wide range of plasma conditions. For ion-acoustic turbulence, a criterion is derived, analogous to one previously obtained for laser heated plasmas, that predicts when Ohmic heating dominates over electron-electron collisions. This dominance leads to the generation of electron distributions with reduced high-energy tails relative to a Maxwellian distribution of the same temperature. Ion-acoustic turbulence lowers the current requirements needed to generate these distributions. When the laser heating criterion is rederived with ion-acoustic turbulence included in the theory, a similar reduction in the laser intensity needed to produce non-Maxwellian distributions is found. Thus we show that ion-acoustic turbulence uniformly (i.e., by the same numerical factor) reduces the electrical and heat conductivities, as well as the current (squared) and laser intensity levels needed to drive the plasma into non-Maxwellian states. These effects are large over a wide range of plasma temperatures and densities such as found in Z-pinch, laser-produced, or opening switch plasmas. The reduction in laser intensity thresholds for generating non-Maxwellian states is a result of microturbulence enhanced laser absorption, which can be observed at any laser intensity. Thus, if microturbulence is the cause of the heat flux inhibition, then the magnitude of the inhibition might be directly observed through the use of probe-laser beams. Finally, we calculate the laser intensities and the current densities needed to change the electron distributions in the presence of ion-acoustic turbulence. These calculations are carried out by assuming that the electrostatic fluctuations scale as the square root of the electron plasma parameter in a weakly microturbulent selenium plasma. The laser intensities calculated in this example are found to be only slightly in excess of those used in recently conducted experiments. RP WHITNEY, KG (reprint author), USN,RES LAB,DIV PLASMA PHYS,WASHINGTON,DC 20375, USA. NR 29 TC 13 Z9 13 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD MAR PY 1993 VL 47 IS 3 BP 1968 EP 1976 DI 10.1103/PhysRevE.47.1968 PG 9 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA KY137 UT WOS:A1993KY13700057 ER PT J AU DIALETIS, D MARSH, SJ KAPETANAKOS, CA AF DIALETIS, D MARSH, SJ KAPETANAKOS, CA TI DYNAMIC BEHAVIOR OF AN ELECTRON RING CLOSE TO A CYCLOTRON-RESONANCE IN A MODIFIED BETATRON ACCELERATOR SO PHYSICAL REVIEW E LA English DT Article AB The effect on the electron-ring dynamics when a cyclotron resonance is crossed in a modified betatron accelerator has been studied analytically and numerically. It has been found that, in the presence of small vertical field errors, there is a field-error-amplitude threshold below which the normalized transverse velocity beta(perpendicular-to) of the gyrating electrons is bounded (Fresnel regime) and above which it is unbounded (lock-in regime). In the lock-in regime, the average value of the normalized axial (toroidal) momentum gammabeta(theta), where gamma is the relativistic factor and beta(theta) is the normalized axial velocity, remains constant, i.e., the resonance is never crossed. In addition, above threshold, beta(perpendicular-to) increases proportionally to the square root of the time. The threshold value of the vertical field error amplitude can be made larger either by increasing the acceleration rate or by adding a small oscillatory toroidal field to the main toroidal field. The multiple crossing of the same resonance, in the presence of such a small oscillatory toroidal field, was also studied with some interesting results. RP DIALETIS, D (reprint author), USN,RES LAB,DIV PLASMA PHYS,WASHINGTON,DC 20375, USA. NR 10 TC 2 Z9 2 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD MAR PY 1993 VL 47 IS 3 BP 2043 EP 2060 DI 10.1103/PhysRevE.47.2043 PG 18 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA KY137 UT WOS:A1993KY13700065 ER PT J AU CROUCH, JD AF CROUCH, JD TI RECEPTIVITY AND THE EVOLUTION OF BOUNDARY-LAYER INSTABILITIES OVER SHORT-SCALE WAVINESS SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Article AB Perturbation methods are used to analyze the receptivity and early evolution of boundary-layer instabilities over a wavy surface. The length scale for the surface variation is considered to be much smaller than the natural instability wavelength. This provides a simplified model for distributed roughness. Acoustic disturbances in the free stream couple with steady perturbations resulting from the waviness to force traveling-wave modes. At first order, the disturbance field contains a Stokes mode resulting from the acoustic perturbation, and a pair of steady modes resulting from the surface variation. Interactions between these modes produce steady, unsteady, and traveling-wave modes at second order. Further interactions, at third order, then produce a forcing that is close to resonance with the natural instabilities. The near-resonant forcing provides for a distributed energy transfer into the natural-instability eigenmode resulting in a nonlocalized receptivity. The total amplitude resulting from the receptivity shows an effective subcritical growth. Growth downstream of the neutral point is also increased. When the waviness has an abrupt beginning, the effective growth rates become very large. Results from the analysis show qualitative features that are observed in stability experiments for boundary layers over distributed roughness. C1 USN,RES LAB,WASHINGTON,DC 20375. NR 11 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 0899-8213 J9 PHYS FLUIDS A-FLUID PD MAR PY 1993 VL 5 IS 3 BP 561 EP 567 DI 10.1063/1.858882 PG 7 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA KQ417 UT WOS:A1993KQ41700004 ER PT J AU HANDLER, RA LEVICH, E SIROVICH, L AF HANDLER, RA LEVICH, E SIROVICH, L TI DRAG REDUCTION IN TURBULENT CHANNEL FLOW BY PHASE RANDOMIZATION SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Article ID PIPE-FLOW; LAYER AB Results of numerical simulations of plane turbulent channel flow are presented in which a forcing is introduced which derives from the randomization of selected Fourier modes. In all cases, the randomization is introduced uniformly throughout the channel. The properties of the resulting turbulence are strongly dependent on both the wave numbers whose phases are randomized and the forcing frequency. Two principal wave-number bands have been selected. The first includes a selected subset of the largest length scales of the turbulence. Forcing in this band results in a fully sustained maximum mass flux increase above that of normal turbulence of 30%, which translates into a drag reduction of 58%. Many of the statistical properties of the simulated drag-reduced turbulence generated in this manner are in good qualitative agreement with the statistical properties of turbulence observed in experiments in which drag reduction is achieved through the introduction of small concentrations of long-chained polymers into the flow. In a second set of simulations, the phases of the intermediate and smallest wavelengths were randomized. Forcing at these scales of motion results in a drag increase. Speculations on the mechanism of the drag reduction by phase randomization are offered. C1 CUNY CITY COLL,DEPT PHYS,NEW YORK,NY 10031. BROWN UNIV,DEPT MATH,PROVIDENCE,RI 02912. RP HANDLER, RA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 26 TC 30 Z9 31 U1 0 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8213 J9 PHYS FLUIDS A-FLUID PD MAR PY 1993 VL 5 IS 3 BP 686 EP 694 DI 10.1063/1.858652 PG 9 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA KQ417 UT WOS:A1993KQ41700015 ER PT J AU GUZDAR, PN LIU, CS LEHMBERG, RH AF GUZDAR, PN LIU, CS LEHMBERG, RH TI INDUCED SPATIAL INCOHERENCE EFFECTS ON THE CONVECTIVE RAMAN INSTABILITY SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID RAYLEIGH-TAYLOR INSTABILITY; LASER-PRODUCED PLASMAS; PARAMETRIC-INSTABILITY; SUPPRESSION; SCATTERING; BANDWIDTH; TARGETS; LIGHT; BEAM; FILAMENTATION AB The effect of the induced spatial incoherence method of laser beam smoothing on the convective Raman instability in an underdense inhomogeneous plasma has been studied. It is found that only for bandwidths comparable to, or greater than, the time-averaged homogeneous growth rate, is there significant smoothing effect resulting in a reduction of the backscattered radiation. However, for narrow bandwidths the backscattered radiation computed in the presence of hot spots created by the echelons, turns out to be significantly less than the levels observed in the Naval Research Laboratory experiments. We argue that a combination of three-dimensional effects and filamentation may account for the observed level of enhanced scattering. C1 USN,RES LAB,WASHINGTON,DC 20375. RP GUZDAR, PN (reprint author), UNIV MARYLAND,PLASMA RES LAB,COLL PK,MD 20742, USA. NR 23 TC 11 Z9 11 U1 1 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD MAR PY 1993 VL 5 IS 3 BP 910 EP 919 DI 10.1063/1.860941 PG 10 WC Physics, Fluids & Plasmas SC Physics GA KR123 UT WOS:A1993KR12300022 ER PT J AU SCHMITT, AJ AF SCHMITT, AJ TI THERMAL FILAMENTATION IN PLASMAS WITH NONLOCAL THERMAL-CONDUCTIVITY SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID LASER-PRODUCED PLASMAS; ELECTRON HEAT-TRANSPORT; INSTABILITY SUPPRESSION; LIGHT; MODEL; BEAM AB Thermal filamentation and self-focusing of laser light has been shown to be significantly altered in typical inertial confinement fusion (ICF)-type laser plasmas because of heat flux inhibition associated with nonlocal electron thermal conduction. The conductivity becomes appreciably nonlocal when the temperature scale length is less than about 100 electron mean-free paths. In contrast to previous flux-limiter models, this mechanism is also important for small temperature perturbations such as those associated with thermal filamentation, where the heat flux can be orders of magnitude less than the free-streaming value. Using a three-dimensional time-dependent laser-plasma propagation code modified to include nonlocal electron thermal conductivity, the scaling and behavior of nonlocal thermal filamentation are investigated. Both unsmoothed and optically smoothed laser beams are studied. The simulation results are contrasted with earlier results generated with the classical Spitzer-Harm conductivity, and compared to a perturbation analysis. The filamentation length predicted by the perturbation analysis for unsmoothed and smoothed beams compares favorably to the simulations. This theory is used to predict the behavior of optically smoothed beams in large inhomogeneous plasmas that cannot be adequately resolved by simulation. RP SCHMITT, AJ (reprint author), USN,RES LAB,DIV PLASMA PHYS,LASER PLASMA BRANCH,WASHINGTON,DC 20375, USA. NR 20 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 0899-8221 J9 PHYS FLUIDS B-PLASMA PD MAR PY 1993 VL 5 IS 3 BP 932 EP 943 DI 10.1063/1.860976 PG 12 WC Physics, Fluids & Plasmas SC Physics GA KR123 UT WOS:A1993KR12300024 ER PT J AU UHM, HS AF UHM, HS TI A THEORY OF FERROMAGNETIC WAVE-GUIDE ACCELERATORS DRIVEN BY AN ELECTRON-BEAM SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID PLASMA AB A fully self-consistent theory of ferromagnetic waveguide accelerators driven by a relativistic electron beam is developed. The theoretical analysis is based on Faraday's law, which provides a second-order partial-differential equation of the azimuthal magnetic field, under the assumption that muepsilon much greater than 1. Here mu and epsilon are the permeability and dielectric constant of the waveguide material. The azimuthal magnetic field and axial acceleration field are obtained in forms of integral equations for an arbitrary profile of the drive-beam current I(t). In the limit when the conductivity sigma of the waveguide material is zero, the acceleration mechanism is similar to the typical wake-field accelerators. In this limit, the acceleration field is proportional to the square root of the parameter mu/epsilon and can be easily more than 200 MV/m for moderate system parameters. On the other hand, for high conductivity limit, the acceleration mechanism is the magnetic field decay, exhibiting that the electromagnetic fields are a decaying function of the time. With appropriate physical parameters, the acceleration gradient of the magnetic field-decay accelerator is also very large. RP UHM, HS (reprint author), USN,CTR SURFACE WARFARE,10901 NEW HAMPSHIRE AVE,SILVER SPRING,MD 20903, USA. NR 18 TC 7 Z9 7 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD MAR PY 1993 VL 5 IS 3 BP 972 EP 986 DI 10.1063/1.860947 PG 15 WC Physics, Fluids & Plasmas SC Physics GA KR123 UT WOS:A1993KR12300029 ER PT J AU DEENEY, C LEPELL, PD COCHRAN, FL COULTER, MC WHITNEY, KG DAVIS, J AF DEENEY, C LEPELL, PD COCHRAN, FL COULTER, MC WHITNEY, KG DAVIS, J TI ARGON GAS PUFF IMPLOSION EXPERIMENTS AND 2-DIMENSIONAL MODELING SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID X-RAY-EMISSION; Z-PINCH; PLASMA; SPECTROSCOPY AB The K-shell x ray yields from argon gas puff Z pinches are observed to increase from 3.5 +/- 1.0 kJ to 13 +/- 1.0 kJ when inwardly tilted nozzles are used on a 6 TW, 4 MA generator. This increase is associated with the elimination of the zipper effect and the achievement of higher density plasmas, as confirmed by x-ray diagnostics. Two-dimensional (2-D) magnetohydrodynamic modeling of the gas puff implosions indicates that the collapsing shell reaches a higher density and smaller diameter when the axial zipper is eliminated. The calculations show that axial mass flow in the zippering cases result in nonhollow collapses which limit the final pinch radii and densities. The calculations also indicate that narrower nozzle exits contribute to increasing the assembled plasma density. C1 USN,RES LAB,WASHINGTON,DC 20375. RP DEENEY, C (reprint author), PHYS INT CO,2700 MERCED ST,SAN LEANDRO,CA 94577, USA. NR 39 TC 35 Z9 35 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD MAR PY 1993 VL 5 IS 3 BP 992 EP 1001 DI 10.1063/1.860949 PG 10 WC Physics, Fluids & Plasmas SC Physics GA KR123 UT WOS:A1993KR12300031 ER PT J AU SCHAEFER, BE AHMAD, IA DOGGETT, L AF SCHAEFER, BE AHMAD, IA DOGGETT, L TI RECORDS FOR YOUNG MOON SIGHTINGS SO QUARTERLY JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article ID VISIBILITY AB We examine various claims of record and near record young moon sightings. We find that the claims for 1916 May 2, 1895 July 22, and 1910 February 10 were made under cloudy skies, hence the reports are likely to have an error in the date of observation. Similar problems with the reported date have occurred for the claimed sightings on 1885 December II, 1989 May 5, and 1991 September 7. Other reports from 1989 May 5 are shown to have reported incorrectly the moon's position and orientation, and so the observed source was not the moon. Of the reliable reports, the record for sightings with the unaided eye is 15.4 h by Julius Schmidt, while the record for sightings with optical aid is 13 h 28 min by Robert C. Victor. We find that the reliable reports can be sharply distinguished from the dubious reports based on such factors as observer experience, promptness of report, and observer preparation. C1 USN OBSERV,OFF NAVT ALMANAC,WASHINGTON,DC 20390. IMAD AD DEAN INC,BETHESDA,MD 20814. RP SCHAEFER, BE (reprint author), NASA,GODDARD SPACE FLIGHT CTR,CODE 661,GREENBELT,MD 20771, USA. NR 21 TC 3 Z9 3 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0035-8738 J9 Q J ROY ASTRON SOC JI Q. J. R. Astron. Soc. PD MAR PY 1993 VL 34 IS 1 BP 53 EP 56 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KQ768 UT WOS:A1993KQ76800004 ER PT J AU WETZEL, LB AF WETZEL, LB TI A TIME-DOMAIN MODEL FOR SEA SCATTER SO RADIO SCIENCE LA English DT Article ID WAVE-PROPAGATION; SAMPLING THEORY; SIGNAL AB With the increasing use of ultra high resolution probes in the investigation of radar sea scatter, it is of interest to consider a time domain formulation of sea scatter that emphasizes the instantaneous response of the surface to impulselike waveforms. In this paper a simple scalar analogue of radar sea scatter in the time domain is presented. An impulse (delta function) is shown to return a signal that is highly sensitive to both the curvature and slope of the scattering surface. Using a simulated gravity wave as a reference scatterer, the response to realizable waveforms based on the Gabor wavelet is examined. It is found that a symmetric wavelet scatters much like the impulse, while the return for an antisymmetric wavelet is considerably weaker. Some implications of causality in ultra high resolution scattering are discussed, along with the similarities and differences between the time and frequency domain formulations of the surface scattering problem. RP WETZEL, LB (reprint author), USN,RES LAB,CODE 5303,WASHINGTON,DC 20375, USA. NR 17 TC 14 Z9 14 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0048-6604 J9 RADIO SCI JI Radio Sci. PD MAR-APR PY 1993 VL 28 IS 2 BP 139 EP 150 DI 10.1029/92RS02884 PG 12 WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Remote Sensing; Telecommunications SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Remote Sensing; Telecommunications GA KX051 UT WOS:A1993KX05100004 ER PT J AU SHRIVERLAKE, LC OGERT, RA LIGLER, FS AF SHRIVERLAKE, LC OGERT, RA LIGLER, FS TI A FIBEROPTIC EVANESCENT-WAVE IMMUNOSENSOR FOR LARGE MOLECULES SO SENSORS AND ACTUATORS B-CHEMICAL LA English DT Article; Proceedings Paper CT 1ST EUROPEAN CONF ON OPTICAL CHEMICAL SENSORS AND BIOSENSORS ( EUROPT(R)ODE 1 ) CY APR 12-15, 1992 CL GRAZ, AUSTRIA AB Detection of toxins and other large molecules is important for both clinical and environmental analyses. A significant factor in analyses of these compounds is the safety of the operator. The NRL fiber-optic biosensor has been created to utilize long optical fibers to prevent the contamination of the operator and the optical components from hazardous materials. The optical fiber is clad for the majority of its length, with only a small portion of the core exposed. Capture antibodies are immobilized on the exposed core, which has been tapered for improved sensitivity. The toxins from Clostridium botulinum and pseudexin have been detected in the evanescent wave in concentrations as low as 30 pM in under 1 min. RP SHRIVERLAKE, LC (reprint author), USN, RES LAB, CTR BIO MOLEC SCI & ENGN, CODE 6900, WASHINGTON, DC 20375 USA. NR 20 TC 27 Z9 27 U1 1 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 MAR 1 PY 1993 VL 11 IS 1-3 BP 239 EP 243 DI 10.1016/0925-4005(93)85261-8 PG 5 WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation SC Chemistry; Electrochemistry; Instruments & Instrumentation GA KX147 UT WOS:A1993KX14700031 ER PT J AU BRIGGS, WL HENSON, VE AF BRIGGS, WL HENSON, VE TI WAVELETS AND MULTIGRID SO SIAM JOURNAL ON SCIENTIFIC COMPUTING LA English DT Note DE WAVELETS; MULTIGRID ID ORTHONORMAL BASES; DECOMPOSITION AB This note explores the suggestive similarities between wavelet (multiresolution) and multigrid approaches to general operator equations. After presenting the essentials of wavelet and multigrid methods, it can be shown that classical multigrid methods use near-orthogonal basis functions to provide the same orthogonal decomposition of the fine grid space OMEGA(h) that multiresolution methods generate for the maximum resolution space V0. C1 USN,POSTGRAD SCH,DEPT MATH,MONTEREY,CA 93493. UNIV COLORADO,COMPUTAT MATH GRP,DENVER,CO 80217. RP BRIGGS, WL (reprint author), UNIV COLORADO,DEPT MATH,DENVER,CO 80217, USA. NR 12 TC 18 Z9 20 U1 0 U2 0 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 MAR PY 1993 VL 14 IS 2 BP 506 EP 510 DI 10.1137/0914031 PG 5 WC Mathematics, Applied SC Mathematics GA KP467 UT WOS:A1993KP46700015 ER PT J AU SWARTZ, P AF SWARTZ, P TI NEW ROLES FOR UNITED-STATES MILITARY SO SLOAN MANAGEMENT REVIEW LA English DT Letter RP SWARTZ, P (reprint author), USN,CTR NAVAL ANAL,ALEXANDRIA,VA, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU MASS INST TECHNOL PI CAMBRIDGE PA SLOAN SCH MANAGE, 50 MEMORIAL DR, CAMBRIDGE, MA 02139 SN 0019-848X J9 SLOAN MANAGE REV JI Sloan Manage. Rev. PD SPR PY 1993 VL 34 IS 3 BP 6 EP 6 PG 1 WC Business; Management SC Business & Economics GA KX852 UT WOS:A1993KX85200007 ER PT J AU LEE, GS THOMPSON, PE DAVIS, JL OMAGGIO, JP SCHMIDT, WA AF LEE, GS THOMPSON, PE DAVIS, JL OMAGGIO, JP SCHMIDT, WA TI CHARACTERIZATION OF MOLECULAR-BEAM EPITAXIALLY GROWN INSB LAYERS AND DIODE STRUCTURES SO SOLID-STATE ELECTRONICS LA English DT Article ID DETECTOR APPLICATIONS; SUPERLATTICES; INASSB; GAAS; BUFFER AB InSb epitaxial layers have been grown on GaAs and InSb substrates by molecular beam epitaxy (MBE). A 14 mum-thick InSb film grown on a GaAs substrate with a 300 angstrom buffer layer of InSb grown by atomic layer epitaxy has 65,000 and 125,000 cm2/Vs electron mobilities at room temperature and 77 K, respectively, and a 41 arcsec full width at half maximum (FWHM) X-ray rocking curve. The mobility was 60,000 and 110,000 cm2/Vs at room temperature and 77 K, respectively, for thicknesses of 4-5 mum when the sample was sequentially stripped. InSb diode structures were grown on GaAs substrates and processed to make mesa diodes. They had large leakage currents and zero bias resistance area products (R0 A) were less than 100 OMEGA-cm2 at 77 K. However a homoepitaxially grown InSb diode had a R0 A value of 2.5 x 10(5) OMEGA-cm2 at 77 K. The leakage current density was 7.0 x 10(-8) A/cm2 at 25 mV reverse bias. This is the first reported high performance InSb diode grown by MBE. C1 USN,RES LAB,WASHINGTON,DC 20375. NR 22 TC 13 Z9 13 U1 2 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1101 J9 SOLID STATE ELECTRON JI Solid-State Electron. PD MAR PY 1993 VL 36 IS 3 BP 387 EP 389 DI 10.1016/0038-1101(93)90091-4 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied; Physics, Condensed Matter SC Engineering; Physics GA KP193 UT WOS:A1993KP19300010 ER PT J AU OKAMOTO, Y XU, ZS MCLIN, MG FONTANELLA, JJ PAK, YS GREENBAUM, SG AF OKAMOTO, Y XU, ZS MCLIN, MG FONTANELLA, JJ PAK, YS GREENBAUM, SG TI SYNTHESIS AND PROPERTIES OF A CATION-CONDUCTING, HIGH-TEMPERATURE POLYMER ELECTROLYTE SO SOLID STATE IONICS LA English DT Article; Proceedings Paper CT SATELLITE MEETING ON POLYMER IONICS, AT THE INTERNATIONAL CONF ON THE SCIENCE AND TECHNOLOGY OF SYNTHETIC METALS CY AUG 19-21, 1992 CL CHALMERS UNIV, GOTHENBURG, SWEDEN SP NFR, NUTEK, NORDISKA MINISTERRADET HO CHALMERS UNIV ID ELECTRICAL RESPONSE AB A new class of polymer electrolyte, high temperature polymer electrolytes, as an electrolyte in high discharge rate batteries is Proposed. As an initial effort in the development of these materials, sodium and lithium salts of sulfonated poly(p-phenyleneterephtalamide) have been prepared. DSC and electrical conductivity studies have been performed on these films. The conductivity exhibits Arrhenius behavior over the temperature range in which they are thermally stable (180-240-degrees-C) with the material containing sodium being more conductive than those containing lithium. Although the electrical performance of these materials is inadequate from a practical standpoint, it is suggested that with additional development these materials could function as electrolytes for high discharge rate batteries. C1 USN ACAD,DEPT PHYS,ANNAPOLIS,MD 21402. CUNY HUNTER COLL,DEPT PHYS,NEW YORK,NY 10021. RP OKAMOTO, Y (reprint author), POLYTECH INST NEW YORK,DEPT CHEM,BROOKLYN,NY 11201, USA. NR 23 TC 14 Z9 14 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2738 J9 SOLID STATE IONICS JI Solid State Ion. PD MAR PY 1993 VL 60 IS 1-3 BP 131 EP 134 DI 10.1016/0167-2738(93)90286-C PG 4 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA LC309 UT WOS:A1993LC30900021 ER PT J AU MCLIN, MG WINTERSGILL, MC FONTANELLA, JJ CHEN, RS JAYAKODY, JP GREENBAUM, SG AF MCLIN, MG WINTERSGILL, MC FONTANELLA, JJ CHEN, RS JAYAKODY, JP GREENBAUM, SG TI HIGH-PRESSURE STUDIES OF HYDRATED NAFION MEMBRANES - DIELECTRIC-RELAXATION AND DEUTERON NMR SO SOLID STATE IONICS LA English DT Article; Proceedings Paper CT SATELLITE MEETING ON POLYMER IONICS, AT THE INTERNATIONAL CONF ON THE SCIENCE AND TECHNOLOGY OF SYNTHETIC METALS CY AUG 19-21, 1992 CL CHALMERS UNIV, GOTHENBURG, SWEDEN SP NFR, NUTEK, NORDISKA MINISTERRADET HO CHALMERS UNIV ID CONTAINING PERFLUOROSULFONATE IONOMERS; ION MOTIONS; SYSTEMS; NACL; KCL AB Audio frequency electrical conductivity/dielectric relaxation and nuclear magnetic resonance studies of NAFION-117 have been carried out at pressures up to 0.3 GPa (3 kbar). For some samples, the electrical conductivity exhibits dispersion typical of hopping conductivity in an amorphous material, sigma = sigma0omega(m). The values of m are sample dependent and vary from about 0.55 to 0.75. In addition, the values of m are not strongly pressure sensitive. At a given frequency, the electrical conductivity tends to decrease as pressure increases and yield activation volumes on the order of 5 to 10 cm3/mol. The activation volume determined from the NMR spin-lattice relaxation time measurements are also sample dependent. The data shown correspond to an activation volume of about 8.6 cm3/mol. The results of the high pressure electrical conductivity studies also yield activation volumes on the order of that determined via NMR. C1 CUNY HUNTER COLL,DEPT PHYS,NEW YORK,NY 10021. RP MCLIN, MG (reprint author), USN ACAD,DEPT PHYS,ANNAPOLIS,MD 21402, USA. NR 12 TC 18 Z9 18 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2738 J9 SOLID STATE IONICS JI Solid State Ion. PD MAR PY 1993 VL 60 IS 1-3 BP 137 EP 140 DI 10.1016/0167-2738(93)90287-D PG 4 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA LC309 UT WOS:A1993LC30900022 ER PT J AU Moran, LB Berkowitz, JK Yesinowski, JP AF Moran, Liam B. Berkowitz, Jeffery K. Yesinowski, James P. TI A method for detection of spectral spin diffusion from minor peaks, and its application to F-19 MAS NMR of antimony(III)-doped fluorapatite SO SOLID STATE NUCLEAR MAGNETIC RESONANCE LA English DT Article DE phosphor; fluorapatite; spin diffusion; F-19 NMR; MAS NMR AB A new technique for detecting spectral spin diffusion in solids under MAS NMR conditions that is particularly well suited for accurately measuring cross-relaxation from minor spectral components is presented. The pulse sequence, SINK (Saturation Inter-Nuclear Kinetics), selectively saturates the magnetization of a minor spectral component with a series of rotor-synchronized DANTE pulse trains and monitors spin diffusion to other peaks with a non-selective 90 degrees pulse. We have used SINK with F-19 MAS NMR on samples of calcium fluorapatite doped with Sb3+ to measure spin diffusion between a weak peak at 68.6 ppm due to fluoride ions associated with Sb3+ and other peaks in the spectrum. The SINK experiment clearly demonstrates that spin diffusion from the former peak to the main resonance of fluorapatite at 64.0 ppm is faster than spin diffusion to a second antimony-related peak at 65.6 ppm. These results strengthen our previous conclusion that antimony(III) occupies a phosphate site in the apatite lattice, with an SbO33- group replacing a PO43- group. The SINK experiment also enables the detection of a "hidden" peak at approximately 62.9 ppm that is otherwise obscured by the intense main peak at 64.0 ppm. C1 [Moran, Liam B.; Yesinowski, James P.] Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA. [Berkowitz, Jeffery K.] GTE Elect Prod Corp, Danvers, MA 01923 USA. [Yesinowski, James P.] USN, Res Lab, Washington, DC 20375 USA. RP Yesinowski, JP (reprint author), USN, Res Lab, Code 6120, Washington, DC 20374 USA. FU GTE Electrical Products Corporation; Office of Naval Research FX We are grateful to Dr. James L. Dye for useful discussions. We gratefully acknowledge GTE Electrical Products Corporation for partial financial support of this work. This work was supported in part by the Office of Naval Research. NR 19 TC 3 Z9 3 U1 1 U2 3 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0926-2040 J9 SOLID STATE NUCL MAG JI Solid State Nucl. Magn. Reson. PD MAR PY 1993 VL 1 IS 6 BP 307 EP 311 DI 10.1016/0926-2040(93)90012-C PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter; Spectroscopy SC Chemistry; Physics; Spectroscopy GA V26HU UT WOS:000208537500002 PM 7834305 ER PT J AU GAMMEL, JT SAXENA, A BISHOP, AR BATISTIC, I AF GAMMEL, JT SAXENA, A BISHOP, AR BATISTIC, I TI FEMTOSECOND DYNAMICS, PHOTOEXCITATION AND ESR-SPECTRA OF MX CHAIN SOLIDS SO SYNTHETIC METALS LA English DT Article; Proceedings Paper CT SYMP ON SYNTHETIC ELECTROACTIVE MATERIALS FOR NONLINEAR OPTICS AND ELECTRONICS, AT THE 1992 SPRING CONF OF THE EUROPEAN MATERIAL RESEARCH SOC CY JUN 02-05, 1992 CL STRASBOURG, FRANCE SP COUNCIL EUROPE, COMMISS EUROPEAN COMMUNITIES, BANQUE POPULAIRE, CTR RECH NUCL, CNRS, ELSEVIER SCI PUBL, OFF TOURISME VILLE STRASBOURG, EUROPEAN PARLIAMENT, VILLE STRASBOURG, XEROX AB Non-linear adiabatic dynamics and ESR spectra associated with non-linear excitations in MX chain (M = Pt; X = Cl, Br, I) materials are numerically studied within a discrete, 3/4-filled, two-band, tight-binding extended Peierls-Hubbard model. Both Hartree-Fock (HF) adiabatic molecular relaxation and molecular dynamics techniques are employed to investigate the time evolution of solitons, polarons, bipolarons in charge-density-wave (CDW) ground state materials. The time evolution of excitons, defect pairs and/or breathers is studied subsequent to photoexcitation. The ESR spectra associated with the resulting spin carrying non-linear excitations such as neutral solitons, triplet excitons as well as electron and hole polarons are then calculated within the above model. The superhyperfine structure in the ESR spectra is attributed to a small spin density present on the halogen sublattice. C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. UNIV ZAGREB,INST PHYS,ZAGREB 410011,CROATIA. LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. RP GAMMEL, JT (reprint author), USN COMMAND,CTR CONTROL & OCEAN SURVEILLANCE,MAT RES BRANCH,DIV RDT & E,SAN DIEGO,CA 92152, USA. NR 6 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0379-6779 J9 SYNTHETIC MET JI Synth. Met. PD MAR 1 PY 1993 VL 54 IS 1-3 BP 237 EP 241 DI 10.1016/0379-6779(93)91066-B PG 5 WC Materials Science, Multidisciplinary; Physics, Condensed Matter; Polymer Science SC Materials Science; Physics; Polymer Science GA KT786 UT WOS:A1993KT78600028 ER PT J AU SAXENA, A HUANG, XZ BISHOP, AR WORL, LA LOVE, SP SWANSON, BI GAMMEL, JT AF SAXENA, A HUANG, XZ BISHOP, AR WORL, LA LOVE, SP SWANSON, BI GAMMEL, JT TI PHOTOINDUCED ELECTRON-HOLE CHARGE SEPARATION, INTRINSIC SELF-DOPING AND NOVEL DEVICE APPLICATIONS OF Q1D HETEROJUNCTION MATERIALS - MIXED-HALIDE MX SOLIDS SO SYNTHETIC METALS LA English DT Article; Proceedings Paper CT SYMP ON SYNTHETIC ELECTROACTIVE MATERIALS FOR NONLINEAR OPTICS AND ELECTRONICS, AT THE 1992 SPRING CONF OF THE EUROPEAN MATERIAL RESEARCH SOC CY JUN 02-05, 1992 CL STRASBOURG, FRANCE SP COUNCIL EUROPE, COMMISS EUROPEAN COMMUNITIES, BANQUE POPULAIRE, CTR RECH NUCL, CNRS, ELSEVIER SCI PUBL, OFF TOURISME VILLE STRASBOURG, EUROPEAN PARLIAMENT, VILLE STRASBOURG, XEROX AB We have extensively studied, both experimentally and theoretically, the following three mixed-halide systems: (i) PtClxBr1-x, (ii) PtClxI1-x and (iii) PtBrxI1-x for a variety of concentrations x. We have obtained direct spectroscopic evidence (vibrational modes) for charge separation from resonance Raman (RR) experiments on doped and photoexcited single crystals of PtClxBr1-x. In particular, electron polarons preferentially locate on the PtBr segment while hole polarons are trapped within PtCl segments. This polaron charge selectivity, which is potentially very useful for photovoltaic device applications, is demonstrated within theoretical calculations based on a discrete, 3/4-filled, two-band, tight-binding, extended Peierls-Hubbard model, showing strong hybridization of PtCl and PtBr electronic bands as the driving force for separation. In contrast to PtClxBr1-x, we find that both the PtClxI1-x and the PtBrxI1-x systems exhibit qualitatively different behavior, such as intrinsic 'self-doping'. In other words, our simulations predict that electronic charge is spontaneously removed from the PtI segment and injected into the PtCl (or PtBR) segment, thus creating hole defects in PtI and electron defects (polarons/bipolarons) in PtCl (or PtBr). C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,ISOTOPE & STRUCT CHEM GRP,LOS ALAMOS,NM 87545. USN,CTR OCEAN SYST,MAT RES BRANCH,SAN DIEGO,CA 92152. LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. RP SAXENA, A (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 9 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0379-6779 J9 SYNTHETIC MET JI Synth. Met. PD MAR 1 PY 1993 VL 54 IS 1-3 BP 385 EP 390 DI 10.1016/0379-6779(93)91084-F PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter; Polymer Science SC Materials Science; Physics; Polymer Science GA KT786 UT WOS:A1993KT78600046 ER PT J AU RODIER, G SOLIMAN, AK BOULOUMIE, J KREMER, D AF RODIER, G SOLIMAN, AK BOULOUMIE, J KREMER, D TI PRESENCE OF ANTIBODIES TO HANTAVIRUS IN RAT AND HUMAN-POPULATIONS OF DJIBOUTI SO TRANSACTIONS OF THE ROYAL SOCIETY OF TROPICAL MEDICINE AND HYGIENE LA English DT Note ID HEMORRHAGIC-FEVER; VIRUSES C1 UNIV MARYLAND,INST PHYS SCI & TECHNOL,INT HLTH PROGRAM,COLL PK,MD 20742. DJIBOUTI MINIST HLTH,DJIBOUTI,DJIBOUTI. RP RODIER, G (reprint author), USN,MED RES UNIT 3,CAIRO,EGYPT. NR 6 TC 11 Z9 11 U1 0 U2 1 PU ROYAL SOC TROPICAL MEDICINE PI LONDON PA MANSON HOUSE 26 PORTLAND PLACE, LONDON, ENGLAND W1N 4EY SN 0035-9203 J9 T ROY SOC TROP MED H JI Trans. Roy. Soc. Trop. Med. Hyg. PD MAR-APR PY 1993 VL 87 IS 2 BP 160 EP 161 DI 10.1016/0035-9203(93)90469-7 PG 2 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA LC477 UT WOS:A1993LC47700011 PM 8101667 ER PT J AU CORWIN, A HABIB, M WATTS, D OLSON, J DARWISH, M HIBBS, R BOTROS, B KLEINOSKY, M SHOPE, R KILPATRICK, M AF CORWIN, A HABIB, M WATTS, D OLSON, J DARWISH, M HIBBS, R BOTROS, B KLEINOSKY, M SHOPE, R KILPATRICK, M TI PREVALENCE OF ANTIBODY TO RIFT-VALLEY FEVER VIRUS IN THE NILE RIVER DELTA OF EGYPT, 13 YEARS AFTER A MAJOR OUTBREAK SO TRANSACTIONS OF THE ROYAL SOCIETY OF TROPICAL MEDICINE AND HYGIENE LA English DT Note C1 MINIST HLTH CAIRO,CTR FIELD APPL RES,CAIRO,EGYPT. AIN SHAMS UNIV,FAC MED,CAIRO,EGYPT. YALE UNIV,NEW HAVEN,CT 06520. RP CORWIN, A (reprint author), USN,MED RES UNIT 3,CAIRO,EGYPT. NR 5 TC 1 Z9 1 U1 0 U2 0 PU ROYAL SOC TROPICAL MEDICINE PI LONDON PA MANSON HOUSE 26 PORTLAND PLACE, LONDON, ENGLAND W1N 4EY SN 0035-9203 J9 T ROY SOC TROP MED H JI Trans. Roy. Soc. Trop. Med. Hyg. PD MAR-APR PY 1993 VL 87 IS 2 BP 161 EP 161 DI 10.1016/0035-9203(93)90470-B PG 1 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA LC477 UT WOS:A1993LC47700012 PM 8337715 ER PT J AU HUBA, JD GREBOWSKY, JM AF HUBA, JD GREBOWSKY, JM TI SMALL-SCALE DENSITY IRREGULARITIES IN THE NIGHTSIDE VENUS IONOSPHERE - COMPARISON OF THEORY AND OBSERVATIONS SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID HYBRID-DRIFT INSTABILITY; PLASMA; ORBITER; SIGNALS AB The lower-hybrid-drift instability has been proposed as a mechanism to generate small-scale density and 100 Hz electric field fluctuations in the nightside Venus ionosphere [Huba, 1992]. The primary purpose of this paper is to compare this theory with observations of density irregularities. Marginal stability boundaries (gamma = 0) for the lower-hybrid-drift instability and the occurrence of small-scale density fluctuations are presented as a function of magnetic field B and density n. For density gradient scale lengths in the range 2 - 10 km, 80 - 85% of the density fluctuations lie in the unstable B/n parameter regime (gamma > 0). A secondary purpose of the paper is to present stability boundaries for the onset of instability at a wavelength for which the Pioneer Venus Orbiter (PVO) could measure a Doppler-shifted frequency of 100 Hz. The conditions on B and n for instability in this situation are more stringent than those for marginal stability, especially at low densities (n less-than-or-equal-to 5 x 10(3) cm-3). In general, the instability is most likely to be generated in regions of low beta: high magnetic field strength and low density, as found in ionospheric holes or troughs. C1 NASA,GODDARD SPACE FLIGHT CTR,ATMOSPHERES LAB,GREENBELT,MD 20771. RP HUBA, JD (reprint author), USN,RES LAB,DIV PLASMA PHYS,SPACE PLASMA BRANCH,CODE 6780,WASHINGTON,DC 20375, USA. RI Grebowsky, Joseph/I-7185-2013 NR 35 TC 6 Z9 6 U1 0 U2 0 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 FEB 25 PY 1993 VL 98 IS E2 BP 3079 EP 3086 DI 10.1029/92JE02841 PG 8 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KX587 UT WOS:A1993KX58700005 ER PT J AU BLIGHTYNAN, ME BHAGWAT, SA DOUGLASS, LW THOMAS, JR CASTONGUAY, TW AF BLIGHTYNAN, ME BHAGWAT, SA DOUGLASS, LW THOMAS, JR CASTONGUAY, TW TI THE EFFECTS OF CHRONIC COLD STRESS AND FOOD-DEPRIVATION ON ADRENAL HORMONES AND MACRONUTRIENT CHOICE SO FASEB JOURNAL LA English DT Meeting Abstract C1 UNIV MARYLAND,COLL PK,MD 20742. USN,MED RES INST,BETHESDA,MD 20814. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 23 PY 1993 VL 7 IS 4 BP A647 EP A647 PN 2 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP975 UT WOS:A1993KP97500740 ER PT J AU JONES, TE HOYT, RW DELANY, JP HESSLINK, RL ASKEW, EW AF JONES, TE HOYT, RW DELANY, JP HESSLINK, RL ASKEW, EW TI A COMPARISON OF 2 METHODS OF MEASURING WATER-INTAKE OF SOLDIERS IN THE FIELD SO FASEB JOURNAL LA English DT Meeting Abstract C1 USA,ENVIRONM MED RES INST,NATICK,MA 01760. PENNIGTON BIOMED RES CTR,BATON ROUGE,LA 70808. USN,HLTH RES CTR,SAN DIEGO,CA 92186. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 23 PY 1993 VL 7 IS 4 BP A610 EP A610 PN 2 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP975 UT WOS:A1993KP97500528 ER PT J AU BACKER, DC HAMA, S VANHOOK, S FOSTER, RS AF BACKER, DC HAMA, S VANHOOK, S FOSTER, RS TI TEMPORAL VARIATIONS OF PULSAR DISPERSION MEASURES SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, GENERAL; PULSARS, GENERAL ID MILLISECOND PULSARS; INTERSTELLAR-MEDIUM; ASTROMETRY; SCATTERING; DENSITIES; DISCOVERY AB We present observations of dispersion measure (DM) variability in the directions of pulsars PSR 1821 - 24, PSR 1855 + 09, PSR 1937 + 2 1, and PSR 1951 + 32, and relate these results to previously reported work. Temporal variations of pulsar dispersion measures provide a direct sample of the integrated spectrum of electron density fluctuations in the intervening plasma. The spectrum is sampled over a range of length scales from 10(13) to 10(15) cm owing to the relative peculiar motion of the Sun and the pulsar with respect to their local standards of rest. The amplitude of the variations over a fixed time interval appears to depend on the square root of the distance. This dependence is flatter than expected based on studies of diffractive scattering effects that are produced by density fluctuations on scales from 10(9) to 10(11) cm. This difference in statistics suggests a distinction in the physical properties, such as location or driving mechanism, of the fluctuations on the two scales. The square root dependence of the DM variations can be attributed to the random walk growth of the electron column density fluctuations through many independent cells. Observations over a wider range of dispersion measure are required to place the dependence on firmer statistical grounds. We interpret the cells as wedges of electron density excess, or deficit. Pulsars in supernova remnants and pulsar wind nebulae show enhanced scattering in comparison with isolated pulsars with similar electron column densities-a conclusion which has been assumed true, but which has lacked strong experimental evidence. C1 UNIV CALIF BERKELEY,RADIO ASTRON LAB,BERKELEY,CA 94720. USN,RES LAB,CTR ADV SPACE SENSING,WASHINGTON,DC 20375. RP BACKER, DC (reprint author), UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720, USA. NR 42 TC 56 Z9 59 U1 1 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 FEB 20 PY 1993 VL 404 IS 2 BP 636 EP 642 DI 10.1086/172317 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KL879 UT WOS:A1993KL87900024 ER PT J AU FELDMAN, U LAMING, JM AF FELDMAN, U LAMING, JM TI A BURST MODEL FOR LINE EMISSION IN THE SOLAR ATMOSPHERE .3. A REASSESSMENT OF THE ASSUMPTIONS OF CONSTANT PRESSURE AND STEADY-STATE CORONAL EQUILIBRIUM IN THE SOLAR TRANSITION REGION SO ASTROPHYSICAL JOURNAL LA English DT Article DE SUN, FLARES; SUN, TRANSITION REGION ID UNRESOLVED FINE-STRUCTURES; TEMPERATURE REGION; SUN; RATIOS; PLASMAS AB We investigate the temperature dependence of the electron densities inferred from various spectral line diagnostics for the quiet Sun, two active regions, and the 1973 June 15 flare, all observed by NRL instruments on Skylab. We find that the common assumption of constant pressure in these solar regions is very poor, especially for the quiet Sun and the active regions, and that a constant density assumption is much closer to the observations. Such a conclusion is not contradicted by the morphology of these regions, as observed by the HRTS instrument. We also investigate the variation of the nonthermal mass motion with departures of the line formation temperature from that corresponding to ionization equilibrium. C1 SFA INC,LANDOVER,MD 20785. RP FELDMAN, U (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 25 TC 21 Z9 21 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 FEB 20 PY 1993 VL 404 IS 2 BP 799 EP 804 DI 10.1086/172334 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KL879 UT WOS:A1993KL87900041 ER PT J AU KYLLING, A STAMNES, K MEIER, RR ANDERSON, DE AF KYLLING, A STAMNES, K MEIER, RR ANDERSON, DE TI THE 200-NM TO 300-NM RADIATION-FIELD IN THE STRATOSPHERE - COMPARISON OF MODELS WITH OBSERVATION SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID MULTIPLE-SCATTERING; CROSS-SECTIONS; ABSORPTION AB The SABE 1 experiment (Herman and Mentall, 1982) measured the direct and scattered solar radiation at wavelengths between 190 and 320 nm from a balloon floating at 40 km altitude. We use state of the art radiative transfer models together with cross sections and solar flux data commonly used in modeling of the stratosphere to calculate the direct and scattered radiation at 40 km. The comparison between theory and experiment made by Herman and Mentall (1982) is extended. Significant discrepancies in the ratio of the scattered to direct flux not discussed in their work were found in the Schumann-Runge band and above 280 nm. Possible reasons for the differences are discussed. C1 USN,RES LAB,EO HULBURT CTR SPACE RES,DIV SPACE SCI,WASHINGTON,DC 20375. JOHNS HOPKINS UNIV,APPL PHYS LAB,LAUREL,MD 20723. RP KYLLING, A (reprint author), UNIV ALASKA,INST GEOPHYS,FAIRBANKS,AK 99775, USA. RI Meier, Robert/G-4749-2014; Kylling, Arve/B-1137-2017 OI Meier, Robert/0000-0001-8497-7115; Kylling, Arve/0000-0003-1584-5033 NR 16 TC 9 Z9 9 U1 0 U2 0 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 FEB 20 PY 1993 VL 98 IS D2 BP 2741 EP 2745 DI 10.1029/92JD02687 PG 5 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KN689 UT WOS:A1993KN68900013 ER PT J AU AELLIG, CP KAMPFER, N BEVILACQUA, RM AF AELLIG, CP KAMPFER, N BEVILACQUA, RM TI ERROR ANALYSIS OF CLO, O-3, AND H2O ABUNDANCE PROFILES RETRIEVED FROM MILLIMETER-WAVE LIMB SOUNDING MEASUREMENTS SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID WATER-VAPOR; SUBMILLIMETER; TEMPERATURE AB A rigorous error analysis is applied to the retrieval of chlorine monoxide (ClO), ozone (O3), and water vapor (H2O) profiles from millimeter wave spectra measured with a limb sounding instrument at 204, 184, and 183 GHz. The effect of different height resolutions on the accuracy and precision is studied. The nature of the different error sources and their contributions to the total error are discussed. A quantitative analysis for a specific limb sounding experiment, the MAS on the ATLAS spacelab shuttle program, is presented. The accuracy of the profiles to be retrieved is 30% for ClO around 35 km (for an altitude resolution of 5 km and an integration time of 200 s per tangent height). O3 can be retrieved at an accuracy of 5 to 9% between 18 and 60 km (3 km; 1-100 s, depending on height). H2O can be retrieved at an accuracy of 4 to 9% between 20 and 75 km (3 km; 1-100 s). For O3, measurements at a resolution of 1 km are possible between 18 and 50 km, for H2O between 20 and 60 km. C1 USN,RES LAB,CTR ADV SPACE SENSING,WASHINGTON,DC 20375. RP AELLIG, CP (reprint author), UNIV BERN,INST ANGEW PHYS,SIDLERSTR 5,CH-3012 BERN,SWITZERLAND. NR 18 TC 13 Z9 13 U1 0 U2 0 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 FEB 20 PY 1993 VL 98 IS D2 BP 2975 EP 2983 DI 10.1029/92JD02131 PG 9 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KN689 UT WOS:A1993KN68900031 ER PT J AU BRAISTED, JC HARABIN, AL AF BRAISTED, JC HARABIN, AL TI INCREASED RED-CELL OSMOTIC FRAGILITY AND HEMATOCRIT FOLLOWING HYPERBARIC O2 ARE RELATED TO ACIDOSIS SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,BETHESDA,MD 20889. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 19 PY 1993 VL 7 IS 3 BP A349 EP A349 PN 1 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP974 UT WOS:A1993KP97402023 ER PT J AU DERION, T BECKETT, MB HODGDON, JA MOFFATT, R WEBB, P AF DERION, T BECKETT, MB HODGDON, JA MOFFATT, R WEBB, P TI REGIONAL BODY HEAT EXTRACTION IN DIVERS WEARING A WATER-COOLED TUBE SUIT SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,HLTH RES CTR,SAN DIEGO,CA 92186. USN,HLTH RES CTR,YELLOW SPRINGS,OH 45387. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 19 PY 1993 VL 7 IS 3 BP A16 EP A16 PN 1 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP974 UT WOS:A1993KP97400087 ER PT J AU FISHMAN, RS LARSON, DE SYSTROM, DM HROVAT, MI HESSLINK, RI AF FISHMAN, RS LARSON, DE SYSTROM, DM HROVAT, MI HESSLINK, RI TI DIETARY-EFFECTS ON EXERCISING MUSCLE METABOLISM BY P-31-MRS SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,HLTH RES CTR,SAN DIEGO,CA 92152. MGH,PULM & CRIT CARE UNIT,BOSTON,MA. MIT,FRANCIS BITTER NATL MAGNET LAB,BOSTON,MA. NIDDK,CDNS,PHOENIX,AZ. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 19 PY 1993 VL 7 IS 3 BP A225 EP A225 PN 1 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP974 UT WOS:A1993KP97401297 ER PT J AU HARFORD, R REED, HL KOWALSKI, K MALIK, M HESSLINK, RL QUESADA, MH DALESANDRO, MM COSGROVE, S YOUNG, B AF HARFORD, R REED, HL KOWALSKI, K MALIK, M HESSLINK, RL QUESADA, MH DALESANDRO, MM COSGROVE, S YOUNG, B TI 5'MONO-DEIODINASE ACTIVITY IN SWINE LIVER, KIDNEY, THYROID, AND SKIN WITH COLD-EXPOSURE SO FASEB JOURNAL LA English DT Meeting Abstract C1 UNIV ALBERTA,EDMONTON T6G 2P5,ALBERTA,CANADA. USN,MED RES INST,BETHESDA,MD 20889. NR 2 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 19 PY 1993 VL 7 IS 3 BP A439 EP A439 PN 1 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP974 UT WOS:A1993KP97402540 ER PT J AU KAUFMAN, JW SCHERER, PW AF KAUFMAN, JW SCHERER, PW TI A PROPOSED MECHANISM FOR UPPER RESPIRATORY-INFECTIONS SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,CTR AIR WARFARE,WARMINSTER,PA 18974. UNIV PENN,PHILADELPHIA,PA 19104. NR 4 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 19 PY 1993 VL 7 IS 3 BP A504 EP A504 PN 1 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP974 UT WOS:A1993KP97402922 ER PT J AU KAYAR, SR AXLEY, MJ HARABIN, AL AF KAYAR, SR AXLEY, MJ HARABIN, AL TI OXIDATION OF HYDROGEN BY MAMMALIAN-TISSUES IN HYPERBARIA SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,MED RES INST,BETHESDA,MD 20889. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 19 PY 1993 VL 7 IS 3 BP A449 EP A449 PN 1 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP974 UT WOS:A1993KP97402600 ER PT J AU KINCAID, P EMENS, K HOWIE, R HESSLINK, R AF KINCAID, P EMENS, K HOWIE, R HESSLINK, R TI THYROTROPIN (TSH) AND ALDOSTERONE (ALDO) ARE INFLUENCED BY ALTITUDE, COLD-EXPOSURE, AND ENERGY DEFICIT SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,HLTH RES CTR,SAN DIEGO,CA 92186. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 19 PY 1993 VL 7 IS 3 BP A439 EP A439 PN 1 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP974 UT WOS:A1993KP97402537 ER PT J AU KOWALSKI, KR HARFORD, R REED, HL HOMER, L AF KOWALSKI, KR HARFORD, R REED, HL HOMER, L TI OXYGEN-CONSUMPTION MODIFICATION IN MILITARY PERSONNEL ASSIGNED TO OUTDOOR WORK IN A COLD CLIMATE SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,MED RES INST,BETHESDA,MD 20889. NR 0 TC 0 Z9 0 U1 0 U2 1 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 19 PY 1993 VL 7 IS 3 BP A438 EP A438 PN 1 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP974 UT WOS:A1993KP97402535 ER PT J AU MALIK, M DALESANDRO, MM REED, HL QUESADA, M HESSLINK, R HOMER, L YOUNG, B AF MALIK, M DALESANDRO, MM REED, HL QUESADA, M HESSLINK, R HOMER, L YOUNG, B TI THYROID-HORMONE RECEPTORS - EFFECTS OF COLD-EXPOSURE ON HEPATIC NUCLEAR T(3)-RECEPTOR ACTIVITY SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,MED RES INST,BETHESDA,MD 20889. UNIV ALBERTA,EDMONTON T6G 2P5,ALBERTA,CANADA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 19 PY 1993 VL 7 IS 3 BP A439 EP A439 PN 1 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP974 UT WOS:A1993KP97402536 ER PT J AU MCKIRNAN, MD WILLIAMS, RL LIMJOCO, U GRAY, CG AF MCKIRNAN, MD WILLIAMS, RL LIMJOCO, U GRAY, CG TI HYPERTONIC SALINE/DEXTRAN VS LACTATED RINGERS TREATMENT FOR HEMORRHAGE IN DEHYDRATED SWINE SO FASEB JOURNAL LA English DT Meeting Abstract C1 UNIV CALIF SAN DIEGO,DEPT MED,LA JOLLA,CA 92093. USN HOSP,SAN DIEGO,CA 92134. NR 0 TC 1 Z9 1 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 19 PY 1993 VL 7 IS 3 BP A320 EP A320 PN 1 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP974 UT WOS:A1993KP97401851 ER PT J AU QUESADA, MH AF QUESADA, MH TI MODULATION OF THE THERMOGENIC PROPERTIES OF AMINOPHYLLINE SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,MED RES INST,BETHESDA,MD 20889. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 19 PY 1993 VL 7 IS 3 BP A439 EP A439 PN 1 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP974 UT WOS:A1993KP97402539 ER PT J AU THORNTON, M SHURTLEFF, D KOWALSKI, K SCHROT, J HARFORD, R THOMAS, J AF THORNTON, M SHURTLEFF, D KOWALSKI, K SCHROT, J HARFORD, R THOMAS, J TI EFFECT OF THE OPIATE ANTAGONIST NALTREXONE ON COGNITIVE FUNCTION AND BODY-TEMPERATURE IN HUMANS EXPOSED TO SEVERE HEAT-STRESS SO FASEB JOURNAL LA English DT Meeting Abstract C1 USN,MED RES INST,BETHESDA,MD 20889. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD FEB 19 PY 1993 VL 7 IS 3 BP A489 EP A489 PN 1 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA KP974 UT WOS:A1993KP97402830 ER PT J AU DENNIS, ML DULING, IN AF DENNIS, ML DULING, IN TI INTRACAVITY DISPERSION MEASUREMENT IN MODELOCKED FIBER LASER SO ELECTRONICS LETTERS LA English DT Article DE OPTICAL FIBERS; LASERS AB It has previously been shown that the minimum pulse width obtainable in modelocked fibre lasers depends primarily on he total cavity dispersion. The Letter compares measurements of the dispersion in figure eight lasers, taken directly by wavelength tuning and indirectly by the sideband spectrum. The dispersions of the different component fibres, including the gain fibre, are deduced from these in situ measurements. RP DENNIS, ML (reprint author), USN,RES LAB,CODE 6572,WASHINGTON,DC 20375, USA. NR 9 TC 18 Z9 19 U1 0 U2 7 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD FEB 18 PY 1993 VL 29 IS 4 BP 409 EP 411 DI 10.1049/el:19930274 PG 3 WC Engineering, Electrical & Electronic SC Engineering GA LB766 UT WOS:A1993LB76600055 ER PT J AU BODNAR, JW AF BODNAR, JW TI TELEPHONE BOOK OF LIFE SO NATURE LA English DT Letter RP BODNAR, JW (reprint author), USN ACAD,DEPT CHEM,ANNAPOLIS,MD 21402, USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD FEB 18 PY 1993 VL 361 IS 6413 BP 580 EP 580 DI 10.1038/361580a0 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KM776 UT WOS:A1993KM77600024 PM 8437620 ER PT J AU WANEBO, JE MALIK, JM VANDENBERG, SR WANEBO, HJ DRIESEN, N PERSING, JA AF WANEBO, JE MALIK, JM VANDENBERG, SR WANEBO, HJ DRIESEN, N PERSING, JA TI MALIGNANT PERIPHERAL-NERVE SHEATH TUMORS - A CLINICOPATHOLOGICAL STUDY OF 28 CASES SO CANCER LA English DT Article DE NEUROFIBROMATOSIS, MALIGNANT SCHWANNOMA; NEUROFIBROSARCOMA; MALIGNANT NEURILEMOMA; MALIGNANT PERIPHERAL NERVE SHEATH TUMOR ID SCHWANNOMA; SURVIVAL; EXTREMITY; SARCOMAS; PATIENT AB Background. In order to improve management, the files and tissue sections of 28 cases of malignant peripheral nerve sheath tumors (MPNST) diagnosed at the University of Virginia Health Sciences Center between 1960 and 1990 were reviewed. Methods. Clinical data tabulated included age, sex, race, the presence or absence of von Recklinghausen neurofibromatosis type 1 (NF-1), tumor size, tumor location, type of treatment, and status of surgical margins. Pathologic study included assessment of mitotic rate, divergent differentiation, cellular atypia, necrosis, and vascular reaction. Results. The median disease-free survival time was 11 months, and the median overall survival time was 44 months. Overall survival and disease-free survival were significantly influenced by patient age, tumor location, tumor size, extent of surgery, and quality of margins. Patients with a family history of neurofibromatosis also had better disease-free survival. None of the other clinical variables correlated with survival. Conclusions. The authors recommended that patients with NF-1 be followed closely for MPNST development. For most cases, treatment should include aggressive surgery with wide surgical margins combined with adjuvant radiation therapy. Chemotherapy may have a role for treatment failures. C1 YALE UNIV,SCH MED,DEPT PLAST SURG,333 CEDAR ST,4YPB,POB 333,NEW HAVEN,CT 06510. ROGER WILLIAMS MED CTR,PROVIDENCE,RI. YALE UNIV,SCH MED,DEPT NEUROL SURG,NEW HAVEN,CT 06510. YALE UNIV,SCH MED,DEPT PATHOL,NEW HAVEN,CT 06510. BROWN UNIV,DEPT SURG,PROVIDENCE,RI 02912. USN HOSP,DEPT SURG,BETHESDA,MD 20814. OI Wanebo, John/0000-0003-1833-2938 NR 25 TC 173 Z9 178 U1 1 U2 1 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0008-543X J9 CANCER JI Cancer PD FEB 15 PY 1993 VL 71 IS 4 BP 1247 EP 1253 DI 10.1002/1097-0142(19930215)71:4<1247::AID-CNCR2820710413>3.0.CO;2-S PG 7 WC Oncology SC Oncology GA KN064 UT WOS:A1993KN06400012 PM 8435801 ER PT J AU GRUBER, JB SELTZER, MD HILLS, ME STEVENS, SB MORRISON, CA AF GRUBER, JB SELTZER, MD HILLS, ME STEVENS, SB MORRISON, CA TI ENERGY-LEVELS AND UP-CONVERSION FLUORESCENCE IN TRIVALENT THULIUM-DOPED YTTRIUM SCANDIUM ALUMINUM GARNET SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID LASERS; GROWTH; CW AB Absorption spectra of Tm3+ ions in Yttrium scandium aluminum garnet are reported between 1.9 and 0.25 mum at 4 K. Laser-excited fluorescence was observed at 4 K from Tm3+ (4f12) multiplet manifolds 1D2, 1G4, F-3(2), and H-3(4) to the ground-state manifold H-3(6). Emission from 1D2 and 1G4 also includes transitions to Stark levels in manifolds F-3(4) and H-3(5). Upconversion excited fluorescence was observed between 1D2 and F-3(4) at 10 K. Analysis of the fluorescence emission confirms assignments given to individual Stark levels based on an analysis of the absorption spectra. A crystal-field splitting calculation was carried out in which a parameterized Hamiltonian (including Coulombic, spin-orbit, and crystal-field terms in D2 symmetry) was diagonalized for all multiplets of the Tm3+ (4f12) configuration. The rms deviation between 42 experimental and calculated Stark levels was 8 cm-1. C1 USN,CTR AIR WARFARE,DIV WEAP,RES DEPT,DIV CHEM,CHINA LAKE,CA 93555. USA,ADELPHI LAB CTR,HARRY DIAMOND LABS,ADELPHI,MD 20375. RP GRUBER, JB (reprint author), SAN JOSE STATE UNIV,DEPT PHYS,SAN JOSE,CA 95192, USA. NR 16 TC 18 Z9 18 U1 0 U2 7 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 FEB 15 PY 1993 VL 73 IS 4 BP 1929 EP 1935 DI 10.1063/1.354080 PG 7 WC Physics, Applied SC Physics GA KM233 UT WOS:A1993KM23300055 ER PT J AU SHENG, YL ROBERGE, D SZU, H LU, TW AF SHENG, YL ROBERGE, D SZU, H LU, TW TI OPTICAL WAVELET MATCHED-FILTERS FOR SHIFT-INVARIANT PATTERN-RECOGNITION SO OPTICS LETTERS LA English DT Article AB We introduce optical wavelet matched filters that perform the wavelet transforms for edge enhancement and perform correlations between the wavelet coefficients for shift-invariant pattern recognition. These new bandpass matched filters show improved discrimination capability with respect to the conventional matched spatial filter and improved signal-to-noise ratio with respect to the phase-only matched filter. C1 USN,SURFACE WARFARE CTR WHITE OAK,INFORMAT PROC GRP,SILVER SPRING,MD 20903. PHYS OPT CORP,TORRANCE,CA 90501. RP SHENG, YL (reprint author), UNIV LAVAL,CTR OPT PHOTON & LASER,DEPT PHYS,ST FOY G1K 7P4,PQ,CANADA. NR 11 TC 58 Z9 61 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD FEB 15 PY 1993 VL 18 IS 4 BP 299 EP 301 DI 10.1364/OL.18.000299 PG 3 WC Optics SC Optics GA KK808 UT WOS:A1993KK80800015 PM 19802116 ER PT J AU BUTLER, JE WOODIN, RL AF BUTLER, JE WOODIN, RL TI THIN-FILM DIAMOND GROWTH MECHANISMS SO PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES LA English DT Article ID CHEMICAL VAPOR-DEPOSITION; HYDROGEN; ENVIRONMENT; KINETICS; METHYL AB The principal chemical mechanisms relevant to the growth of diamond from gaseous hydrogen and hydrocarbon species are presented. The kinetic processes occurring during the activation and transport of the gaseous species to the growing surface are described, with the key processes being the generation and subsequent reactions of gaseous atomic hydrogen. The structure, composition, and dynamics of the growing surface are discussed. A simple, non-stereospecific model of the surface growth process is presented which reveals most of the general characteristics of the growth process, such as the H atom flux dependence of growth rate and quality. A detailed model of growth at the (110) surface sites from single carbon reactants then follows, which highlights the key role of gaseous atomic hydrogen abstractions of hydrogen from the surface. The extension of this understanding to chemistries containing oxygen and halogen species is indicated. C1 NORTON DIAMOND FILM,NORTHBOROUGH,MA 01532. RP BUTLER, JE (reprint author), USN,RES LAB,CODE 6174,WASHINGTON,DC 20375, USA. RI Butler, James/B-7965-2008 OI Butler, James/0000-0002-4794-7176 NR 36 TC 229 Z9 231 U1 4 U2 39 PU ROYAL SOC LONDON PI LONDON PA 6 CARLTON HOUSE TERRACE, LONDON, ENGLAND SW1Y 5AG SN 0962-8428 J9 PHILOS T ROY SOC A JI Philos. Trans. R. Soc. Lond. Ser. A-Math. Phys. Eng. Sci. PD FEB 15 PY 1993 VL 342 IS 1664 BP 209 EP 224 DI 10.1098/rsta.1993.0015 PG 16 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KN321 UT WOS:A1993KN32100002 ER PT J AU NITHIANANDAM, J RIFE, JC AF NITHIANANDAM, J RIFE, JC TI SYNCHROTRON X-RAY OPTICAL-PROPERTIES OF NATURAL DIAMOND SO PHYSICAL REVIEW B LA English DT Article AB Reflectance spectrum of a diamond crystal measured between 200.0 and 610.0 eV is presented. The x-ray reflectance spectrum was combined with an earlier ultraviolet optical spectrum of diamond. Extrapolations to these reflectance spectra were calculated using a set of Lorentz oscillators. These reflectance values were used in obtaining the spectral dependence of the optical dielectric function of diamond via a Kramers-Kronig transform. The accuracy of these optical constants and the reflectance extrapolations were verified using optical sum rules. The refractive index of the diamond is found to be greater than unity near 287.0 eV. C1 USN,RES LAB,DYNAM SOLIDS BRANCH,WASHINGTON,DC 20375. NR 18 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 FEB 15 PY 1993 VL 47 IS 7 BP 3517 EP 3521 DI 10.1103/PhysRevB.47.3517 PG 5 WC Physics, Condensed Matter SC Physics GA KP086 UT WOS:A1993KP08600006 ER PT J AU DUNLAP, BI AF DUNLAP, BI TI ENERGETICS AND FULLERENE FRACTIONATION SO PHYSICAL REVIEW B LA English DT Note ID CARBON CAGES; C70; C60; C-60; APPROXIMATIONS; MOLECULES; FORM; C-70; C34 AB The local-density-functional binding energies per carbon atom Of C50, C60, C70, C72, C76, C78, C84, C180, and C240 fullerenes and various isomers of these are computed at geometries that have been optimized using an empirical potential. Little is found to distinguish fullerenes that have been obtained experimentally and those that have not. It is unlikely that energetics plays a dominant role in determining which fullerenes are made in the Kratschmer-Huffman process. RP DUNLAP, BI (reprint author), USN,RES LAB,CODE 6179,WASHINGTON,DC 20375, USA. OI Dunlap, Brett/0000-0003-1356-6559 NR 41 TC 14 Z9 14 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 FEB 15 PY 1993 VL 47 IS 7 BP 4018 EP 4021 DI 10.1103/PhysRevB.47.4018 PG 4 WC Physics, Condensed Matter SC Physics GA KP086 UT WOS:A1993KP08600077 ER PT J AU MRSTIK, BJ MCMARR, PJ SAKS, NS RENDELL, RW KLEIN, RB AF MRSTIK, BJ MCMARR, PJ SAKS, NS RENDELL, RW KLEIN, RB TI HYDROGEN PERMEABILITY IN THERMALLY GROWN FILMS OF SIO2 ON SILICON SUBSTRATES SO PHYSICAL REVIEW B LA English DT Note ID INTERFACE STATES; VITREOUS SILICA; DIFFUSION; MODEL AB We describe a technique for measuring the room-temperature permeability of molecular hydrogen through thin films of thermally grown SiO2 on Si substrates. We have used this technique to determine the H-2 permeability in oxide films ranging from 161 to 1082 angstrom in thickness. We find that the permeability decreases as the film thickness decreases. Even for the thickest films studied, the permeability is only about 8% of the value characteristic of bulk SiO2. We attribute the permeability differences to a gradient in the density of the thermal oxide. C1 SFA INC,LANDOVER,MD 20785. RP MRSTIK, BJ (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 18 TC 11 Z9 11 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 FEB 15 PY 1993 VL 47 IS 7 BP 4115 EP 4118 DI 10.1103/PhysRevB.47.4115 PG 4 WC Physics, Condensed Matter SC Physics GA KP086 UT WOS:A1993KP08600102 ER PT J AU HEMSTREET, LA FONG, CY NELSON, JS AF HEMSTREET, LA FONG, CY NELSON, JS TI 1ST-PRINCIPLES CALCULATIONS OF SPIN-ORBIT SPLITTINGS IN SOLIDS USING NONLOCAL SEPARABLE PSEUDOPOTENTIALS SO PHYSICAL REVIEW B LA English DT Article ID NORM-CONSERVING PSEUDOPOTENTIALS; SEMICONDUCTORS AB We have extended the considerable computational advantages of separable, nonlocal pseudopotentials to the calculation of spin-orbit splittings in solids. We write the total ionic pseudopotential as a sum of scalar relativistic and spin-orbit contributions, where each term can be represented by a fully nonlocal potential of the separable Kleinman-Bylander (KB) form. The scalar term, which reduces to the standard KB expression for the pseudopotential in the limit where one can neglect spin-orbit interactions, is used in the local-density approximation to calculate zeroth-order electronic properties in the usual way, and spin-orbit splittings are calculated to first order using perturbation theory. We have tested our procedure by calculating the spin-orbit splittings at high symmetry points of the zinc-blende III-V semiconductors GaAs, InAs, AlSb, GaSb, and InSb. The calculated splittings in all cases are in excellent agreement with those obtained from other first-principles calculations and with experiment. Since our spin-orbit operator is fully nonlocal in both radial and angular coordinates, a considerable reduction in the labor required to calculate matrix elements has been achieved. This makes our approach ideally suited for use with ab initio molecular-dynamics techniques, which currently have become the methods of choice for exploring the electronic and structural properties of solids. C1 UNIV CALIF DAVIS, DEPT PHYS, DAVIS, CA 95616 USA. SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. RP USN, RES LAB, WASHINGTON, DC 20375 USA. NR 18 TC 26 Z9 26 U1 1 U2 1 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 FEB 15 PY 1993 VL 47 IS 8 BP 4238 EP 4243 DI 10.1103/PhysRevB.47.4238 PG 6 WC Physics, Condensed Matter SC Physics GA KQ098 UT WOS:A1993KQ09800011 ER PT J AU DENK, W KEOLIAN, RM OGAWA, S JELINSKI, LW AF DENK, W KEOLIAN, RM OGAWA, S JELINSKI, LW TI OSCILLATORY FLOW IN THE COCHLEA VISUALIZED BY A MAGNETIC-RESONANCE-IMAGING TECHNIQUE SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID MEMBRANE AB We report a magnetic resonance imaging technique that directly measures motion of cochlear fluids. It uses oscillating magnetic field gradients phase-locked to an external stimulus to selectively visualize and quantify oscillatory fluid motion. It is not invasive, and it does not require optical line-of-sight access to the inner ear. It permits the detection of displacements far smaller than the spatial resolution. The method is demonstrated on a phantom and on living rats. It is projected to have applications for auditory research, for the visualization of vocal tract dynamics during speech and singing, and for determination of the spatial distribution of mechanical relaxations in materials. C1 USN,POSTGRAD SCH,DEPT PHYS,MONTEREY,CA 93943. RP DENK, W (reprint author), AT&T BELL LABS,MURRAY HILL,NJ 07974, USA. RI denk, winfried/I-6627-2012 NR 10 TC 13 Z9 13 U1 0 U2 2 PU NATL ACAD SCIENCES 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 FEB 15 PY 1993 VL 90 IS 4 BP 1595 EP 1598 DI 10.1073/pnas.90.4.1595 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KM607 UT WOS:A1993KM60700093 PM 8434023 ER PT J AU BLANKENSHIP, DD BELL, RE HODGE, SM BROZENA, JM BEHRENDT, JC FINN, CA AF BLANKENSHIP, DD BELL, RE HODGE, SM BROZENA, JM BEHRENDT, JC FINN, CA TI ACTIVE VOLCANISM BENEATH THE WEST ANTARCTIC ICE-SHEET AND IMPLICATIONS FOR ICE-SHEET STABILITY SO NATURE LA English DT Article ID STREAM AB IT is widely understood that the collapse of the West Antarctic ice sheet (WAIS) would cause a global sea level rise of 6 m, yet there continues to be considerable debate about the detailed response of this ice sheet to climate change1-3. Because its bed is grounded well below sea level, the stability of the WAIS may depend on geologically controlled conditions at the base which are independent of climate. In particular, heat supplied to the base of the ice sheet could increase basal melting and thereby trigger ice streaming, by providing the water for a lubricating basal layer of till on which ice streams are thought to slide4,5. Ice streams act to protect the reservoir of slowly moving inland ice from exposure to oceanic degradation, thus enhancing ice-sheet stability. Here we present aerogeophysical evidence for active volcanism and associated elevated heat flow beneath the WAIS near the critical region where ice streaming begins. If this heat flow is indeed controlling ice-stream formation, then penetration of ocean waters inland of the thin hot crust of the active portion of the West Antarctic rift system could lead to the disappearance of ice streams, and possibly trigger a collapse of the inland ice reservoir. C1 COLUMBIA UNIV,LAMONT DOHERTY GEOL OBSERV,PALISADES,NY 10964. US GEOL SURVEY,TACOMA,WA 98406. US GEOL SURVEY,DENVER,CO 80225. USN,RES LAB,WASHINGTON,DC 20375. RP BLANKENSHIP, DD (reprint author), UNIV TEXAS,INST GEOPHYS,AUSTIN,TX 78759, USA. RI Blankenship, Donald/G-5935-2010 NR 17 TC 114 Z9 115 U1 0 U2 11 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD FEB 11 PY 1993 VL 361 IS 6412 BP 526 EP 529 DI 10.1038/361526a0 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KL714 UT WOS:A1993KL71400056 ER PT J AU FEY, AL MUTEL, RL AF FEY, AL MUTEL, RL TI 608 MHZ VLBI OBSERVATIONS OF THE COMPACT DOUBLE RADIO-SOURCE 2050+364 - CONSTRAINTS ON INTERSTELLAR SCATTERING SO ASTROPHYSICAL JOURNAL LA English DT Article DE ISM, STRUCTURE; RADIO CONTINUUM, INTERSTELLAR; TURBULENCE ID DENSITY TURBULENCE; SCINTILLATION; SCALE; IMAGE AB We report the results of second epoch 608 MHz VLBI observations of the compact double radio source 2050 + 364. Both components of the double have observed angular sizes which scale as theta is-proportional-to lambda2, a result expected for angular broadening by intervening plasma turbulence. The magnitude of the observed broadening is the same for both components and is only moderately in excess of that expected from a diffuse component of interstellar turbulence. Refraction appears to be small for this line of sight. The lack of significant change in component separation since the first epoch places constraints on refractive image wander of the individual components. The observed differential wander of 4 +/- 4 mas is much smaller than the diffractive scattering size and is consistent with an index of an assumed power-law turbulent electron density power spectrum with spectral index alpha < 3.8 for those scales which determine the wander. The smoothness of the image and its stationarity over a period of almost-equal-to 4 yr also support a power-law spectrum with alpha < 4. C1 UNIV IOWA HOSP & CLIN,DEPT PHYS & ASTRON,IOWA CITY,IA 52242. RP FEY, AL (reprint author), USN,RES LAB,CODE 4210,WASHINGTON,DC 20375, USA. NR 31 TC 8 Z9 8 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 FEB 10 PY 1993 VL 404 IS 1 BP 197 EP 205 DI 10.1086/172268 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KK912 UT WOS:A1993KK91200016 ER PT J AU STERLING, AC DOSCHEK, GA FELDMAN, U AF STERLING, AC DOSCHEK, GA FELDMAN, U TI ON THE ABSOLUTE ABUNDANCE OF CALCIUM IN SOLAR-FLARES SO ASTROPHYSICAL JOURNAL LA English DT Article DE SUN, ABUNDANCES; SUN, FLARES; SUN, X-RAYS, GAMMA-RAYS ID DIELECTRONIC SATELLITE SPECTRA; HELIUM-LIKE IONS; EMISSION; ATMOSPHERE; PLASMAS; IRON AB In this paper we determine the abundance of calcium relative to hydrogen in soft X-ray-emitting solar flare plasmas. The abundance is determined by two methods: (1) We measure the intensity ratio of the resonance line of Ca XIX at 3.177 angstrom, which is proportional to the calcium abundance, to the intensity of the adjacent X-ray continuum, which is proportional to the hydrogen abundance, using Bragg crystal spectrometer data. (2) We measure the intensity ratio of the Ca XIX resonance line to the integrated X-ray flux in the 0.5-4.0 angstrom band recorded by GOES spacecraft X-ray detectors. In both cases the data for the Ca XIX resonance line was obtained from the Naval Research Laboratory Bragg crystal spectrometer (SOLFLEX) flown on the Department of Defense P78-1 spacecraft. Results were obtained for 25 flares. We find an average calcium-to-hydrogen abundance of about 5 x 10(-6), which is about a factor of 2 greater than measured for the photosphere. Therefore, on average, our result is consistent with an enhancement of low first ionization potential (FIP) elements in soft X-ray flare plasmas. For one flare, however, the calcium abundance was higher, at about 1.6 times our average result. This indicates that the calcium abundance can vary among flares, as found previously by Solar Maximimum Mission (SMM) investigators. Significant variations of the calcium abundance during the course of a flare are not detected in our data. If such variations exist, they are within about 1 sigma of our average errors. C1 COMPUTAT PHYS INC,FAIRFAX,VA 22031. USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. NR 20 TC 29 Z9 29 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 FEB 10 PY 1993 VL 404 IS 1 BP 394 EP 402 DI 10.1086/172288 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KK912 UT WOS:A1993KK91200036 ER PT J AU MORIARTY, RM RAO, MSC TULADHAR, SM DSILVA, C WILLIAMS, G GILARDI, R AF MORIARTY, RM RAO, MSC TULADHAR, SM DSILVA, C WILLIAMS, G GILARDI, R TI CROWN-ETHER IONOPHORES - CONSTRUCTION OF NEUTRAL CARRIER ION-SELECTIVE ELECTRODES SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID DERIVATIVES C1 UNIV WALES,INST MOLEC & BIOMOLEC ELECTR,BANGOR LL57 IUT,GWYNEDD,WALES. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. RP MORIARTY, RM (reprint author), UNIV ILLINOIS,DEPT CHEM MC111,BOX 4348,CHICAGO,IL 60680, USA. NR 11 TC 26 Z9 26 U1 0 U2 0 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 FEB 10 PY 1993 VL 115 IS 3 BP 1194 EP 1196 DI 10.1021/ja00056a081 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA KL716 UT WOS:A1993KL71600081 ER PT J AU JACKSON, EM WEAVER, BD SUMMERS, GP AF JACKSON, EM WEAVER, BD SUMMERS, GP TI PROTON-INDUCED INCREASE OF THE PENETRATION DEPTH IN A TL2BA2CA1CU2OX MICROSTRIP RESONATOR SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article ID YBA2CU3O7-DELTA AB A microstrip resonator made from two Tl2Ba2Ca1Cu2Ox films separated by a LaAlO3 dielectric has been irradiated with 2 MeV protons in fluence increments up to 10(17) protons/cm2. Measurements of the temperature- and fluence-dependence of the resonant frequency are analyzed in order to determine changes in the microwave penetration depth. The temperature dependence of the penetration depth exhibits Josephson-like behavior. The penetration depth increases almost linearly with fluence, from about 0.8 mum to about 2.3 mum. The increase is attributed to a decrease in the Josepson critical current density. C1 UNIV MARYLAND, DEPT PHYS, CATONSVILLE, MD 21228 USA. RP JACKSON, EM (reprint author), USN, RES LAB, CODE 6615, WASHINGTON, DC 20375 USA. NR 18 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 EI 1873-2143 J9 PHYSICA C JI Physica C PD FEB 10 PY 1993 VL 206 IS 1-2 BP 163 EP 168 DI 10.1016/0921-4534(93)90717-5 PG 6 WC Physics, Applied SC Physics GA KM095 UT WOS:A1993KM09500025 ER PT J AU MEHUYS, D WELCH, DF GOLDBERG, L WELLER, J AF MEHUYS, D WELCH, DF GOLDBERG, L WELLER, J TI 11.6-W PEAK POWER, DIFFRACTION-LIMITED DIODE-TO-DIODE OPTICAL AMPLIFIER SO APPLIED PHYSICS LETTERS LA English DT Article ID BEAM OPERATION AB A 600-mum-wide by 2200-mum-long broad area single-pass semiconductor amplifier is demonstrated to emit up to 11.6 W of peak power in a nearly diffraction-limited far field pattern when injected with 100 mW from a single-mode laser diode. The amplifier slope efficiency of 0.60 W/A is identical to that obtained using a 100 mW Ti:sapphire master oscillator, and only slightly lower than the slope efficiency of 0.75 W/A measured under fully saturated conditions with 400 mW of Ti:sapphire incident power. C1 USN,RES LAB,WASHINGTON,DC 20375. RP MEHUYS, D (reprint author), SPECTRA DIODE LABS,80 ROSE ORCHARD WAY,SAN JOSE,CA 95134, USA. NR 13 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 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD FEB 8 PY 1993 VL 62 IS 6 BP 544 EP 546 DI 10.1063/1.108905 PG 3 WC Physics, Applied SC Physics GA KK924 UT WOS:A1993KK92400002 ER PT J AU RICHARDSON, GE VENZON, DJ PHELPS, R EDISON, M BROWN, M FRAME, JN IHDE, DC JOHNSON, BE AF RICHARDSON, GE VENZON, DJ PHELPS, R EDISON, M BROWN, M FRAME, JN IHDE, DC JOHNSON, BE TI APPLICATION OF AN ALGORITHM FOR STAGING SMALL-CELL LUNG-CANCER CAN SAVE 1/3 OF THE INITIAL EVALUATION COSTS SO ARCHIVES OF INTERNAL MEDICINE LA English DT Article ID BONE-MARROW TRANSPLANTATION; COMBINED MODALITY THERAPY; LEUKEMIA GROUP-B; BRONCHOGENIC-CARCINOMA; PROGNOSTIC FACTORS; COMBINATION CHEMOTHERAPY; COMPUTED-TOMOGRAPHY; RANDOMIZED TRIAL; ANAPLASTIC CARCINOMA; RADIATION-THERAPY AB Objective: Design of a cost-effective algorithm for staging disease in patients with small-cell lung cancer. Designs: An algorithm was constructed by analyzing all permutations of a sequence of procedures required to stage disease in patients with small-cell lung cancer. Procedural costs were determined, and the model was applied to the small-cell lung cancer patient population treated at the National Cancer Institute, Bethesda, Md, from 1973 to 1989. The final algorithm was derived from the permutation with the lowest cost per accurately staged patient. Setting: A single government institute, the National Cancer Institute. Patients: Four hundred fifty-one patients with previously untreated, consecutive histologically documented small-cell lung cancer entered into therapeutic protocols at the National Cancer Institute from April 1973 through July 1989. Data were obtained from small-cell lung cancer protocol databases and patients' medical records. Main Outcome Measures The cost per patient of each sequence of staging procedures when applied to the patient population. Results: The least expensive sequence of procedures saved $1418 per patient when compared with application of a standard set of staging procedures to all patients. The major factor in reducing costs was the concept of stopping the staging procedures after a site of distant metastatic disease had been identified. Conclusions: An algorithm consisting of a set of sequential staging procedures can accurately stage disease in patients with small-cell lung cancer and save more than one third of the costs of an inclusive standard set of staging procedures. C1 NCI, USN,MED ONCOL BRANCH,NATL NAVAL MED CTR,BLDG 8, ROOM 5105, BETHESDA, MD 20889 USA. NCI, BIOSTAT & DATA MANAGEMENT SECT, BETHESDA, MD 20892 USA. NCI, CLIN ONCOL PROGRAM, BETHESDA, MD 20892 USA. NCI, DIV CANC PREVENT & CONTROL, APPL RES BRANCH, BETHESDA, MD 20892 USA. UNIFORMED SERV UNIV HLTH SCI, DEPT MED, BETHESDA, MD 20814 USA. NATL NAVAL MED CTR, BETHESDA, MD 20814 USA. RI Venzon, David/B-3078-2008 NR 75 TC 27 Z9 27 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0003-9926 J9 ARCH INTERN MED JI Arch. Intern. Med. PD FEB 8 PY 1993 VL 153 IS 3 BP 329 EP 337 DI 10.1001/archinte.153.3.329 PG 9 WC Medicine, General & Internal SC General & Internal Medicine GA KK886 UT WOS:A1993KK88600007 PM 8280192 ER PT J AU ANDERSON, GP WIJESURIYA, DC OGERT, RA SHRIVERLAKE, LC GOLDEN, JP LIGLER, FS AF ANDERSON, GP WIJESURIYA, DC OGERT, RA SHRIVERLAKE, LC GOLDEN, JP LIGLER, FS TI FIBER OPTIC-BASED BIOSENSOR - APPLICATIONS IN ENVIRONMENTAL MONITORING SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIO MOLEC SCI & ENGN,WASHINGTON,DC 20375. RI Anderson, George/D-2461-2011 OI Anderson, George/0000-0001-7545-9893 NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD FEB 8 PY 1993 SU 17C BP 197 EP 197 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN466 UT WOS:A1993KN46600669 ER PT J AU SPEEDIE, MK GEELHAAR, L PAYNE, GF SUN, WQ STACY, J AF SPEEDIE, MK GEELHAAR, L PAYNE, GF SUN, WQ STACY, J TI ENZYMES FOR THE BIOREMEDIATION OF NITRATE ESTER WASTE SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 UNIV MARYLAND,DEPT BIOMED CHEM,BALTIMORE,MD 21201. UNIV MARYLAND,CTR AGR BIOTECHNOL,CATONSVILLE,MD 21228. USN,CTR SURFACE WARFARE,INDIAN HEAD,MD 20640. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD FEB 8 PY 1993 SU 17C BP 198 EP 198 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN466 UT WOS:A1993KN46600676 ER PT J AU PRINCE, AS GROTBERG, JB REISS, EL AF PRINCE, AS GROTBERG, JB REISS, EL TI PRIMARY AND SECONDARY FLUTTER OF LEAKAGE FLOW CHANNELS SO JOURNAL OF SOUND AND VIBRATION LA English DT Article ID MULTIPLE-EIGENVALUES; BIFURCATION; LEAD C1 NORTHWESTERN UNIV,DEPT BIOMED ENGN,EVANSTON,IL 60208. NORTHWESTERN UNIV,DEPT ENGN SCI & APPL MATH,EVANSTON,IL 60208. RP PRINCE, AS (reprint author), USN,CTR AIR DEV,WARMINSTER,PA 18974, USA. NR 19 TC 0 Z9 0 U1 1 U2 1 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-460X J9 J SOUND VIB JI J. Sound Vibr. PD FEB 8 PY 1993 VL 161 IS 1 BP 89 EP 107 DI 10.1016/0022-460X(93)90325-6 PG 19 WC Acoustics; Engineering, Mechanical; Mechanics SC Acoustics; Engineering; Mechanics GA KM216 UT WOS:A1993KM21600005 ER PT J AU MERA, AE WALTON, TR AF MERA, AE WALTON, TR TI ANALYSIS OF VOLATILES EVOLVED DURING HIGH-TEMPERATURE TREATMENT OF THERMALLY STABLE POLYMERS .1. NITROGEN-CONTAINING ACETYLENE-TERMINATED RESIN SO JOURNAL OF APPLIED POLYMER SCIENCE LA English DT Article ID CARBONIZATION; CARBON; PYROLYSIS AB Cured samples of a nitrogen-containing acetylene-terminated resin, N,N'-(1,3-phenylene-dimethylidene) bis(3-ethynylaniline), have been heated at 10-degrees-C/min up to 900-degrees-C in a pyroprobe attached to a gas chromatograph/mass spectrometer (GC/MS). Analysis of the volatiles evolved during heating identified both gases and higher boiling compounds. The major higher boiling compounds are benzene, toluene, xylene, aniline, benzonitrile, m-methylaniline, and m-methylbenzonitrile; the gases include ammonia, methane, and traces of carbon dioxide. Correlations between sample temperature and the evolution of each of these compounds have been made. The onset of all volatile formation occurs between 450 and 500-degrees-C. The higher boiling volatiles peak, then end by approximately 700-degrees-C, while the gases peak then fall off but are still being evolved at 900-degrees-C. Average weight loss measurements of 13.6% at 700-degrees-C and 15.7% at 900-degrees-C agree with previously published thermogravimetric analysis (TGA) data. RP MERA, AE (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 18 TC 4 Z9 4 U1 1 U2 2 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0021-8995 J9 J APPL POLYM SCI JI J. Appl. Polym. Sci. PD FEB 5 PY 1993 VL 47 IS 5 BP 867 EP 876 DI 10.1002/app.1993.070470514 PG 10 WC Polymer Science SC Polymer Science GA KG340 UT WOS:A1993KG34000014 ER PT J AU EBITANI, M IN, Y ISHIDA, T SAKAGUCHI, K FLIPPENANDERSON, JL KARLE, IL AF EBITANI, M IN, Y ISHIDA, T SAKAGUCHI, K FLIPPENANDERSON, JL KARLE, IL TI STRUCTURES OF RIBOFLAVIN TETRAACETATE AND TETRABUTYRATE - MOLECULAR PACKING MODE OF RIBOFLAVIN TETRACARBOXYLATE AND ITS EXTENSIVE STACKING AND HYDROGEN-BONDING CHARACTERISTICS SO ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE LA English DT Article ID GLUTATHIONE-REDUCTASE; CRYSTAL-STRUCTURE; RESOLUTION AB Riboflavin tetraacetate (RTAc) acetone solvate monohydrate, 2C25H2gN4O10.C3H6O.H2O, M(r) = 1165.12, orthorhombic, P2(1)2(1)2(1), a = 61.896(8), b = 11.424 (1), c = 8.134 (i) angstrom, V = 5751.5 (12) angstrom3, Z = 4, D(m) = 1.320 (3), D(x) = 1.345 g cm-3, lambda(Cu Kalpha) = 1. 5418 angstrom, mu = 7.84 cm-1, F(000) = 2456, T = 278 K, final R = 0.046 for 5060 independent observed (F(o) > 0.0) reflections. Riboflavin tetrabutyrate (RTB), C33H44N4O10, M(r) = 656.73, triclinic, P1, a = 19.409 (2), b = 15.332 (2), c = 11.784 (1) angstrom, alpha = 95.51 (1), beta = 92.17 (1), gamma = 83.59 (1)-degrees, V = 3465.1 (6) angstrom3, Z = 4, D(m) = 1.250 (2), D(x) = 1.259 g cm-3, lambda(Cu Kalpha) = 1.5418 angstrom, mu = 7.39 cm -1, F(000) = 1400, T = 255 K, final R = 0.094 for 6342 independent observed [F(o) > 3sigma(F(o))] reflections. The crystal structures of RTAc and RTB consist of two and four crystallographically independent molecules, respectively, and are stabilized by extensive stacking (aromatic spacing of 3.3-3.5 angstrom) and NH ... O=C hydrogen-bonded dimer formation between the neighboring molecules. Each of the RTAc and RTB molecules assumes an open conformation, in order to avoid short contacts among four neighboring acetyl or butyryl groups. Although the ribityl backbones are in one of the usually observed conformations, the flexibility of the ester groups contributes to the formation of many conformers in the riboflavin derivatives. The structural characteristics inherent in the isoalloxazine ring and ribityl conformation are discussed. C1 OSAKA UNIV PHARMACEUT SCI,2-10-65 KAWAI,MATSUBARA,OSAKA 580,JAPAN. TOYAMA UNIV,FAC ENGN,GOFU KU,TOYAMA 930,JAPAN. OSAKA UNIV,PROT ENGN RES CTR,SUITA,OSAKA 565,JAPAN. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. NR 18 TC 11 Z9 11 U1 2 U2 4 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-7681 J9 ACTA CRYSTALLOGR B JI Acta Crystallogr. Sect. B-Struct. Commun. PD FEB 1 PY 1993 VL 49 BP 136 EP 144 DI 10.1107/S0108768192007195 PN 1 PG 9 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA KM629 UT WOS:A1993KM62900017 ER PT J AU HARROD, FS AF HARROD, FS TI TO SHINING SEA - A HISTORY OF THE UNITED-STATES-NAVY, 1775-1991 - HOWARTH,S SO AMERICAN HISTORICAL REVIEW LA English DT Book Review RP HARROD, FS (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER HISTORICAL REVIEW PI WASHINGTON PA 400 A ST SE, WASHINGTON, DC 20003 SN 0002-8762 J9 AM HIST REV JI Am. Hist. Rev. PD FEB PY 1993 VL 98 IS 1 BP 229 EP 229 DI 10.2307/2166516 PG 1 WC History SC History GA KN839 UT WOS:A1993KN83900144 ER PT J AU THOUNE, RJ MARGOLIS, LH AF THOUNE, RJ MARGOLIS, LH TI AGE AND SEX AS RISK-FACTORS FOR BURN DEATHS AMONG CHILDREN SO AMERICAN JOURNAL OF DISEASES OF CHILDREN LA English DT Editorial Material C1 UNIV N CAROLINA,DEPT MATERNAL & CHILD HLTH,CHAPEL HILL,NC 27599. RP THOUNE, RJ (reprint author), USN HOSP,CHARLESTON,SC 29408, USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0002-922X J9 AM J DIS CHILD JI Am. J. Dis. Child. PD FEB PY 1993 VL 147 IS 2 BP 132 EP 133 PG 2 WC Pediatrics SC Pediatrics GA KL363 UT WOS:A1993KL36300009 PM 8427232 ER PT J AU BOURGEOIS, AL GARDINER, CH THORNTON, SA BATCHELOR, RA BURR, DH ESCAMILLA, J ECHEVERRIA, P BLACKLOW, NR HERRMANN, JE HYAMS, KC AF BOURGEOIS, AL GARDINER, CH THORNTON, SA BATCHELOR, RA BURR, DH ESCAMILLA, J ECHEVERRIA, P BLACKLOW, NR HERRMANN, JE HYAMS, KC TI ETIOLOGY OF ACUTE DIARRHEA AMONG UNITED-STATES MILITARY PERSONNEL DEPLOYED TO SOUTH-AMERICA AND WEST-AFRICA SO AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE LA English DT Article ID ESCHERICHIA-COLI ENTEROTOXIN; TRAVELERS DIARRHEA; PATHOGENS; CHILDREN; SHIGELLA; DISEASE; CELLS; VIRUS AB A study of acute diarrhea was conducted from 1985 to 1987 among U.S. military personnel participating in routine shipboard exercises in South America and West Africa and ground troops deployed to coastal Ecuador. An enteropathogen was identified in 146 (51%) of 289 acute cases of diarrhea. Enterotoxigenic Escherichia coli, found in 50 (17%) patients with diarrhea, was the most commonly identified enteropathogen. Viral enteropathogens were also found in a high percentage of acute cases of diarrhea: rotavirus was detected in 11% of the patients and Norwalk virus infection in 10%. Most enteric pathogens were acquired in equal frequencies in South America and West Africa, except for rotavirus infection which was identified more often in West Africa and enteroaggregative E. coli infection which was identified more often in South America. Bacterial enteropathogens were frequently resistant to trimethoprim/sulfamethoxazole, but no resistance to quinolone drugs was observed, indicating that quinolone drugs have become important agents for the treatment of diarrhea in South America and West Africa. C1 USN,MED RES INST DETACHMENT,APO AE MIAMI,FL 34031. ARMED FORCES RES INST MED SCI,SAN FRANCISCO,CA 96346. UNIV MASSACHUSETTS,SCH MED,DIV INFECT DIS & IMMUNOL,WORCESTER,MA 01605. RP BOURGEOIS, AL (reprint author), USN,NATL USN MED CTR,INST MED RES,BLDG 17,BETHESDA,MD 20889, USA. NR 25 TC 38 Z9 38 U1 0 U2 1 PU AMER SOC TROP MED & HYGIENE PI MCLEAN PA 8000 WESTPARK DRIVE SUITE 130, MCLEAN, VA 22101 SN 0002-9637 J9 AM J TROP MED HYG JI Am. J. Trop. Med. Hyg. PD FEB PY 1993 VL 48 IS 2 BP 243 EP 248 PG 6 WC Public, Environmental & Occupational Health; Tropical Medicine SC Public, Environmental & Occupational Health; Tropical Medicine GA KU121 UT WOS:A1993KU12100016 PM 8383470 ER PT J AU ADKISSON, GH WATERS, JH BURGER, GA AF ADKISSON, GH WATERS, JH BURGER, GA TI FENTANYL ADDED TO LIDOCAINE RESULTS IN HIGHER SPINAL ANESTHETIC LEVELS SO ANESTHESIA AND ANALGESIA LA English DT Meeting Abstract C1 USN HOSP,SAN DIEGO,CA 92134. NR 2 TC 3 Z9 3 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0003-2999 J9 ANESTH ANALG JI Anesth. Analg. PD FEB PY 1993 VL 76 IS 2 SU S BP S2 EP S2 PG 1 WC Anesthesiology SC Anesthesiology GA KY039 UT WOS:A1993KY03900002 ER PT J AU RHEE, KW PECKERAR, MC AF RHEE, KW PECKERAR, MC TI PROXIMITY EFFECT REDUCTION USING THIN INSULATING LAYERS SO APPLIED PHYSICS LETTERS LA English DT Article ID ELECTRON AB In this letter, we demonstrate a novel method for reducing or eliminating e-beam proximity effect in patterning tungsten for use as an x-ray mask absorber material. The method involves interposting a thin (200 nm) layer of low atomic weight insulating material (such as SiO2) between the resist and the underlying substrate. Examples are shown in which gratings of 0.2 mum lines with a 0.5 mum period were written without dose correction for proximity effect compensation. RP RHEE, KW (reprint author), USN,RES LAB,NANOELECTR PROC FACIL,WASHINGTON,DC 20375, 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 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD FEB 1 PY 1993 VL 62 IS 5 BP 533 EP 534 DI 10.1063/1.108903 PG 2 WC Physics, Applied SC Physics GA KJ726 UT WOS:A1993KJ72600035 ER PT J AU JAGANATHAN, J AGGARWAL, I AF JAGANATHAN, J AGGARWAL, I TI DETERMINATION OF IRON, COBALT, NICKEL, AND COPPER IN HAFNIUM FLUORIDE BY GF-AAS SO APPLIED SPECTROSCOPY LA English DT Article DE ZBLAN GLASS; OPTICAL FIBERS; CORE-CLAD; FORK PLATFORM ID CORE CLAD COMPOSITION; CRYSTALLIZATION; GLASSES; FIBERS AB This paper describes an analytical method for the quantitation of iron, cobalt, nickel, and copper at trace levels with graphite furnace-atomic absorption spectrometry (GF-AAS) without the use of any matrix modifier or preconcentration techniques. A solution of HfF4 (10%, w/v) in HF (24%) was used for this study. The detection limits for iron, cobalt, nickel, and copper were found to be 3, 1, 3, and 2 ppb, respectively. The average precision of measurements (% RSD) for all the elements was <10%. C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. RP JAGANATHAN, J (reprint author), USN,RES LAB,DIV OPT SCI,CODE 6505,WASHINGTON,DC 20375, USA. NR 9 TC 7 Z9 7 U1 1 U2 2 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA PO BOX 1438, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD FEB PY 1993 VL 47 IS 2 BP 190 EP 191 DI 10.1366/0003702934048217 PG 2 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA KM239 UT WOS:A1993KM23900009 ER PT J AU KARPEN, JT ANTIOCHOS, SK DAHLBURG, RB SPICER, DS AF KARPEN, JT ANTIOCHOS, SK DAHLBURG, RB SPICER, DS TI THE KELVIN-HELMHOLTZ INSTABILITY IN PHOTOSPHERIC FLOWS - EFFECTS ON CORONAL HEATING AND STRUCTURE SO ASTROPHYSICAL JOURNAL LA English DT Article DE HYDRODYNAMICS; INSTABILITIES; SUN, ATMOSPHERE; SUN, CORONA ID CURRENT-SHEET FORMATION; ELECTRIC-CURRENT SHEETS; TANG VORTEX SYSTEM; SOLAR CORONA; MAGNETIC-FIELDS; COMPRESSIBLE MEDIUM; DISSIPATION; CONVECTION; ENERGY; TURBULENCE AB The continual motion of the photosphere is essential to a wide range of solar phenomena, from the formation of fluxules and the structure of the granulation network to coronal heating. The velocity structure in and around intergranular lanes is unknown at scales below a few hundred kilometers. Both theoretical and observational arguments lead us to believe, however, that a significant sheared component exists in these locations. For example, largely random, strongly sheared flows have been observed down to the smallest resolved scales in Halpha and continuum images. Sheared flows can be susceptible to the Kelvin-Helmholtz instability, which breaks down the laminar velocity patterns into smaller scale components with significant transverse structure. Any morphological alteration in the velocity field will be reflected in the magnetic field, due to the frozen-in condition. Because the footpoints of the coronal magnetic field move with the photospheric flows, the fine structure of the entire solar atmosphere can be affected. We have performed a series of hydrodynamic numerical simulations which investigate the nonlinear evolution of driven, subsonic velocity shears under a range of typical photospheric conditions. Here the hydrodynamic assumption is justified because the magnetic field is primarily perpendicular to the surface of the high-beta photosphere, thus affecting the characteristic time scales but not the qualitative behavior of the instability. Our calculations show that typical photospheric flows are indeed susceptible to the Kelvin-Helmholtz instability, with rapid nonlinear growth times roughly half of a typical granule lifetime. Approximately half of the initial kinetic energy is transferred to smaller spatial scales, the bulk being concentrated at the scale of the persistent Kelvin-Helmholtz vortices (approximately 100 km). Hence the KHI produces vortical structures in intergranule lanes comparable to a typical fluxule radius, which is precisely the right scale for maximum power transfer to the corona. Relevant photospheric observations and implications for wave-resonance heating and coronal structure also are discussed. C1 USN, RES LAB, COMPUTAT PHYS & FLUID DYNAM LAB, WASHINGTON, DC 20375 USA. NASA, GODDARD SPACE FLIGHT CTR, CTR COMPUTAT SCI, GREENBELT, MD 20771 USA. RP USN, RES LAB, EO HULBURT CTR SPACE RES, CODE 7670, WASHINGTON, DC 20375 USA. RI Karpen, Judith/E-1484-2012; Antiochos, Spiro/D-4668-2012 OI Antiochos, Spiro/0000-0003-0176-4312 NR 51 TC 26 Z9 26 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD FEB 1 PY 1993 VL 403 IS 2 BP 769 EP 779 DI 10.1086/172248 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KJ468 UT WOS:A1993KJ46800034 ER PT J AU CUSHMAN, WB AF CUSHMAN, WB TI A PARALLEL PRINTER PORT TO MATRIX DRIVER WITH HIGH-CURRENT DAC OUTPUT SO BEHAVIOR RESEARCH METHODS INSTRUMENTS & COMPUTERS LA English DT Article AB The circuit described here takes data from an IBM PC, or a compatible, parallel printer port and expands it to drive a matrix of devices. The matrix size is user definable up to a maximum size of 16 by 16 elements (256 elements), but as drawn is an 8 by 24 matrix (196 elements). Each element in the matrix can be inductive, resistive, or capacitive, with a maximum voltage of about 18 volts, and a total maximum current of 15 amps peak, or 8 amps continuous with adequate heat sinks (dissipating 80 watts maximum per driver device). Several matrix elements may be asserted simultaneously. The voltage applied across the matrix ''rails'' is controlled by a digital-to-analog converter with 4096 steps (12-bit accuracy). RP CUSHMAN, WB (reprint author), USN,AEROSP MED RES LAB,NAVAL AIR STN,PENSACOLA,FL 32508, USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU PSYCHONOMIC SOC INC PI AUSTIN PA 1710 FORTVIEW RD, AUSTIN, TX 78704 SN 0743-3808 J9 BEHAV RES METH INSTR JI Behav. Res. Methods Instr. Comput. PD FEB PY 1993 VL 25 IS 1 BP 48 EP 52 DI 10.3758/BF03204448 PG 5 WC Psychology, Mathematical; Psychology, Experimental SC Psychology GA LE096 UT WOS:A1993LE09600006 ER PT J AU ANDERSON, GP WIJESURIYA, DC OGERT, RA SHRIVERLAKE, LC GOLDEN, JP LIGLER, FS AF ANDERSON, GP WIJESURIYA, DC OGERT, RA SHRIVERLAKE, LC GOLDEN, JP LIGLER, FS TI FIBER OPTIC-BASED BIOSENSOR - APPLICATIONS FOR ENVIRONMENTAL MONITORING SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,CODE 6900,WASHINGTON,DC 20375. RI Anderson, George/D-2461-2011 OI Anderson, George/0000-0001-7545-9893 NR 0 TC 1 Z9 1 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1993 VL 64 IS 2 BP A219 EP A219 PN 2 PG 1 WC Biophysics SC Biophysics GA KP517 UT WOS:A1993KP51701260 ER PT J AU BEZRUKOV, SM VODYANOY, I PARSEGIAN, VA AF BEZRUKOV, SM VODYANOY, I PARSEGIAN, VA TI DELINEATION OF CHANNEL STRUCTURES BY THE OSMOTIC ACTION AND PENETRATION OF DIFFERENTLY SIZED NEUTRAL POLYMERS SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 ST PETERSBURG NUCL PHYS INST,ST PETERSBURG,RUSSIA. OFF NAVAL RES,ARLINGTON,VA 22217. NR 0 TC 1 Z9 1 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1993 VL 64 IS 2 BP A92 EP A92 PN 2 PG 1 WC Biophysics SC Biophysics GA KP517 UT WOS:A1993KP51700523 ER PT J AU CHANG, EL MARKOWITZ, M SINGH, A AF CHANG, EL MARKOWITZ, M SINGH, A TI DETERGENT STABILITY OF LIPOSOMES FORMED WITH 1,2-BIS(TRICOSA-10,12-DIYNOYL)-SN-GLYCERO-3-PHOSPHO-CHOLINE (DC8,9PC) AND DINONANOYLPHOSPHATIDYLCHOLINE (DNPC) SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1993 VL 64 IS 2 BP A297 EP A297 PN 2 PG 1 WC Biophysics SC Biophysics GA KP517 UT WOS:A1993KP51701701 ER PT J AU DAVIES, MA PEEK, BM GABER, BP AF DAVIES, MA PEEK, BM GABER, BP TI INTERACTIONS BETWEEN DMPC AND THE FUSION-INHIBITING PEPTIDE, Z-PHE-PHE-GLY, DETERMINED BY FT-IR SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 GEORGETOWN UNIV,SCH MED,DEPT BIOCHEM & MOLEC BIOL,WASHINGTON,DC 20007. USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1993 VL 64 IS 2 BP A187 EP A187 PN 2 PG 1 WC Biophysics SC Biophysics GA KP517 UT WOS:A1993KP51701074 ER PT J AU DAVIES, MA RATNA, BR RUDOLPH, AS AF DAVIES, MA RATNA, BR RUDOLPH, AS TI STRUCTURAL AND THERMODYNAMIC INVESTIGATION OF FILAMENT FORMATION IN A DIACETYLENIC PHOSPHOLIPID SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. GEORGETOWN UNIV,SCH MED,DEPT BIOCHEM & MOLEC BIOL,WASHINGTON,DC 20007. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1993 VL 64 IS 2 BP A73 EP A73 PN 2 PG 1 WC Biophysics SC Biophysics GA KP517 UT WOS:A1993KP51700410 ER PT J AU GOTTSCHALK, WA YEANDLE, S CHURILLA, AM LIEBOVITCH, LS SELECTOR, LY AF GOTTSCHALK, WA YEANDLE, S CHURILLA, AM LIEBOVITCH, LS SELECTOR, LY TI FLUCTUATING MEMBRANE-POTENTIAL, RECORDED BY THE WHOLE CELL PATCH CLAMP TECHNIQUE, OF HUMAN T-LYMPHOCYTE CELL-LINES - EVIDENCE THAT IT IS A FRACTAL OF THE KIND PRODUCED BY FRACTIONAL BROWNIAN-MOTION SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 USN,MED RES INST,WASHINGTON,DC 20350. COLUMBIA UNIV,NEW YORK,NY 10027. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1993 VL 64 IS 2 BP A223 EP A223 PN 2 PG 1 WC Biophysics SC Biophysics GA KP517 UT WOS:A1993KP51701288 ER PT J AU JAMES, E SHRIVERLAKE, L OGERT, R WIESMANN, W CROSS, A LIGLER, F AF JAMES, E SHRIVERLAKE, L OGERT, R WIESMANN, W CROSS, A LIGLER, F TI VERSATILITY OF A FIBER OPTIC BIOSENSOR SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 WRAIR,WASHINGTON,DC 20307. NRL,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1993 VL 64 IS 2 BP A338 EP A338 PN 2 PG 1 WC Biophysics SC Biophysics GA KP517 UT WOS:A1993KP51701946 ER PT J AU PUVVADA, S RATNA, BR AF PUVVADA, S RATNA, BR TI IONOTROPIC GELATION OF ALGINATE IN A CUBIC PHASE SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 USN,RES LAB,CTR BIOMOLEC SCI & ENGN,WASHINGTON,DC 20375. UNIV COLORADO,DEPT PHYS,BOULDER,CO 80309. GEORGETOWN UNIV,MED CTR,DEPT BIOCHEM,WASHINGTON,DC 20007. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1993 VL 64 IS 2 BP A349 EP A349 PN 2 PG 1 WC Biophysics SC Biophysics GA KP517 UT WOS:A1993KP51702007 ER PT J AU TURNER, DC BRANDOW, SL MURPHY, DB GABER, BP AF TURNER, DC BRANDOW, SL MURPHY, DB GABER, BP TI IMAGING TUBULIN MICROTUBULES WITH THE ATOMIC FORCE MICROSCOPE SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 USN,RES LAB,WASHINGTON,DC 20375. JOHNS HOPKINS UNIV,SCH MED,DEPT CELL BIOL & ANAT,BALTIMORE,MD 21205. NR 0 TC 1 Z9 1 U1 1 U2 3 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1993 VL 64 IS 2 BP A262 EP A262 PN 2 PG 1 WC Biophysics SC Biophysics GA KP517 UT WOS:A1993KP51701506 ER PT J AU WILLIAMS, RW LOWREY, AH AF WILLIAMS, RW LOWREY, AH TI STRUCTURE OF UNFOLDED PEPTIDES IN SOLUTION FROM VIBRATIONAL ANALYSIS AND C-13 SUBSTITUTION SO BIOPHYSICAL JOURNAL LA English DT Meeting Abstract C1 UNIFORMED SERV UNIV HLTH SCI,DEPT BIOCHEM,BETHESDA,MD 20814. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD FEB PY 1993 VL 64 IS 2 BP A376 EP A376 PN 2 PG 1 WC Biophysics SC Biophysics GA KP517 UT WOS:A1993KP51702166 ER PT J AU BARAL, S SCHOEN, P AF BARAL, S SCHOEN, P TI SILICA-DEPOSITED PHOSPHOLIPID TUBULES AS A PRECURSOR TO HOLLOW SUBMICRON-DIAMETER SILICA CYLINDERS SO CHEMISTRY OF MATERIALS LA English DT Note ID ELECTROLESS; MICROSTRUCTURES; CHEMISTRY AB A 50-nm-thick silica film was deposited on a phospholipid tubule surface through aggregation of 10-15-nm-diameter silica particulates from an aqueous dispersion. The silica films were mechanically strong enough to remain intact during freeze-drying. When dry coated tubules were heated to 600-degrees-C, the phospholipid decomposed and hollow silica cylinders were left behind. When the coated tubules were electrolessly plated with nickel metal, hollow ferromagnetic cylinders were obtained. C1 USN,RES LAB,WASHINGTON,DC 20375. RP BARAL, S (reprint author), GEOCENTERS INC,10903 INDIWAY,FT WASHINGTON,MD 20744, USA. NR 32 TC 108 Z9 108 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD FEB PY 1993 VL 5 IS 2 BP 145 EP 147 DI 10.1021/cm00026a001 PG 3 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA KN063 UT WOS:A1993KN06300001 ER PT J AU DRESSICK, WJ DULCEY, CS GEORGER, JH CALVERT, JM AF DRESSICK, WJ DULCEY, CS GEORGER, JH CALVERT, JM TI PHOTOPATTERNING AND SELECTIVE ELECTROLESS METALLIZATION OF SURFACE-ATTACHED LIGANDS SO CHEMISTRY OF MATERIALS LA English DT Note AB Organosilanes possessing ligating functions are chemisorbed to surfaces as monolayer thickness films. Patterned deep UV irradiation selectively destroys the ligating ability in the irradiated regions of the film. The resulting surface selectively binds Pd(II) from solution. The bound Pd(II) functions as an electroless catalyst for the deposition of patterned metal films useful in microlithographic applications. C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. RP DRESSICK, WJ (reprint author), USN,RES LAB,CODE 6900,WASHINGTON,DC 20375, USA. NR 19 TC 123 Z9 123 U1 0 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD FEB PY 1993 VL 5 IS 2 BP 148 EP 150 DI 10.1021/cm00026a002 PG 3 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA KN063 UT WOS:A1993KN06300002 ER PT J AU MONDSCHEIN, JF LAZARUS, AA AF MONDSCHEIN, JF LAZARUS, AA TI MULTIPLE BILATERAL UPPER LOBE CAVITARY LESIONS IN A PATIENT WITH INGUINAL DIFFUSE LARGE CELL LYMPHOMA SO CHEST LA English DT Article ID NON-HODGKIN LYMPHOMA; LUNG RP MONDSCHEIN, JF (reprint author), USN HOSP,DEPT PULM 5A,DIV PULM DIS,PORTSMOUTH,VA 23708, USA. NR 8 TC 2 Z9 3 U1 0 U2 0 PU AMER COLL CHEST PHYSICIANS PI NORTHBROOK PA 3300 DUNDEE ROAD, NORTHBROOK, IL 60062-2348 SN 0012-3692 J9 CHEST JI Chest PD FEB PY 1993 VL 103 IS 2 BP 583 EP 584 DI 10.1378/chest.103.2.583 PG 2 WC Critical Care Medicine; Respiratory System SC General & Internal Medicine; Respiratory System GA KL712 UT WOS:A1993KL71200051 PM 8432157 ER PT J AU BEADLE, C HOFFMAN, SL AF BEADLE, C HOFFMAN, SL TI HISTORY OF MALARIA IN THE UNITED-STATES-NAVAL-FORCES AT WAR - WORLD-WAR-I THROUGH THE VIETNAM CONFLICT SO CLINICAL INFECTIOUS DISEASES LA English DT Article AB Malaria has had a major influence on military campaigns for thousands of years. In this paper we summarize the experience of U.S. Navy and Marine forces with malaria during wars of the twentieth century. During World War 1, there were 4,746 new cases of malaria, 68,373 sick-days because of malaria, and 7 deaths due to malaria; during World War II, there were 113,256 new cases, 3,310,800 sick-days, and 90 deaths; and during the Korean War, there were 4,542 new cases, 50,924 sick-days, and no deaths-since most infections were with Plasmodium vivax. During the Vietnam War, there were 24,606 cases of malaria, an estimated 391,965 sick-days because of malaria, and 46 deaths due to malaria. With the worldwide resurgence of malaria, the spread of drug-resistant strains of Plasmodium falciparum, the emergence of chloroquine-resistant P. vivax, and the increasing resistance of Anopheles mosquitoes to insecticides, malaria continues to be an enormous threat to U.S. Navy and Marine Corps personnel deployed to the tropics and subtropics. RP BEADLE, C (reprint author), USN,MED RES INST,MALARIA PROGRAM,12300 WASHINGTON AVE,ROCKVILLE,MD 20852, USA. NR 38 TC 32 Z9 34 U1 1 U2 6 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 1058-4838 J9 CLIN INFECT DIS JI Clin. Infect. Dis. PD FEB PY 1993 VL 16 IS 2 BP 320 EP 329 PG 10 WC Immunology; Infectious Diseases; Microbiology SC Immunology; Infectious Diseases; Microbiology GA KK667 UT WOS:A1993KK66700024 PM 8443317 ER PT J AU BAILEY, W POPOVICH, B JONES, KL AF BAILEY, W POPOVICH, B JONES, KL TI IDENTICAL-TWINS DISCORDANT FOR THE RUSSELL-SILVER SYNDROME SO CLINICAL RESEARCH LA English DT Meeting Abstract C1 USN HOSP SAN DIEGO,DEPT PEDIAT,SAN DIEGO,CA. UNIV CALIF SAN DIEGO,SCH MED,DEPT PEDIAT,LA JOLLA,CA 92093. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SLACK INC PI THOROFARE PA 6900 GROVE RD, THOROFARE, NJ 08086 SN 0009-9279 J9 CLIN RES JI Clin. Res. PD FEB PY 1993 VL 41 IS 1 BP A48 EP A48 PG 1 WC Medicine, Research & Experimental SC Research & Experimental Medicine GA KH410 UT WOS:A1993KH41000257 ER PT J AU DERENONCOURT, A CASTROMAGAN, M JONES, KL AF DERENONCOURT, A CASTROMAGAN, M JONES, KL TI MEDIASTINAL TERATOMA AND PRECOCIOUS PUBERTY IN KLINEFELTER SYNDROME MOSAICISM SO CLINICAL RESEARCH LA English DT Meeting Abstract C1 USN HOSP,DEPT PEDIAT,SAN DIEGO,CA 92134. UC SAN DIEGO,LA JOLLA,CA. WINTHROP U HOSP,MINEOLA,NY. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SLACK INC PI THOROFARE PA 6900 GROVE RD, THOROFARE, NJ 08086 SN 0009-9279 J9 CLIN RES JI Clin. Res. PD FEB PY 1993 VL 41 IS 1 BP A61 EP A61 PG 1 WC Medicine, Research & Experimental SC Research & Experimental Medicine GA KH410 UT WOS:A1993KH41000330 ER PT J AU FLEMING, B AF FLEMING, B TI BROTHERS UNDER THE SKIN, ACHEBE ON 'HEART OF DARKNESS' SO COLLEGE LITERATURE LA English DT Article RP FLEMING, B (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 8 TC 1 Z9 1 U1 0 U2 1 PU WEST CHESTER UNIV PI W CHESTER PA SPECIAL FUNDS OFFICE, W CHESTER, PA 19383 SN 0093-3139 J9 COLL LITERATURE JI Coll. Lit. PD FEB PY 1993 VL 20 IS 1 BP 90 EP 99 PG 10 WC Literature SC Literature GA JW586 UT WOS:A1993JW58600007 ER PT J AU PIVOVAROV, MA ZHANG, H RAMAKER, DE TATEM, PA WILLIAMS, FW AF PIVOVAROV, MA ZHANG, H RAMAKER, DE TATEM, PA WILLIAMS, FW TI SIMILARITY SOLUTIONS IN BUOYANCY-CONTROLLED TURBULENT-DIFFUSION FLAME MODELING (TURBULENT BUOYANT DIFFUSION FLAME MODELING) SO COMBUSTION AND FLAME LA English DT Article ID CHEMICAL-REACTION; FIRE PLUMES; ENTRAINMENT; LAYER; JETS; AIR AB This work considers the applicability of different versions of the k-epsilon hypothesis of turbulence for flame modeling. Utilizing similarity solutions, we find that the k-epsilon hypothesis gives a finite radius for a weak axysimmetric plume above the heat source. The radius of this plume is defined as an eigenvalue of the boundary value problem with unknown boundary. Solving this problem with an adjusted set of parameters from the standard version of the k-epsilon hypothesis gives excellent agreement with experimental data for center line and radial profiles of the mean and turbulent quantities, and also for the radius of the plume and entrainment level. In contrast, the standard set of parameters, widely utilized in flame modeling, gives inaccurate predictions. Specifically, this set of parameters yields underestimates of the radius of the plume and the entrainment level. Since this same trend has been extensively observed in flame modeling, we conclude that the standard set of parameters for the k-epsilon hypothesis is inadequate, and that this is the main reason for the shortcomings of previous numerical models. C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. RP PIVOVAROV, MA (reprint author), GEORGE WASHINGTON UNIV,DEPT CHEM,WASHINGTON,DC 20052, USA. NR 43 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD FEB PY 1993 VL 92 IS 3 BP 308 EP 319 DI 10.1016/0010-2180(93)90042-2 PG 12 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA KK994 UT WOS:A1993KK99400011 ER PT J AU COHEN, ME AF COHEN, ME TI SIMULATION STUDY OF METHODS TO DETECT PERIODONTAL ASSOCIATIONS WHEN THEY ARE INCONSISTENT AMONG SUBJECTS SO COMMUNITY DENTISTRY AND ORAL EPIDEMIOLOGY LA English DT Article DE BIOSTATISTICS; PERIODONTAL ASSOCIATIONS ID GINGIVAL CREVICULAR FLUID; ASPARTATE-AMINOTRANSFERASE AB Most statistical methods used to evaluate associations between indices of clinical periodontal diseases and purported prognostic markers test for effects across subjects. If associations exist within only a subset of subjects. however, associations may be masked, particularly in small studies. This issue was explored by using simulation to study four methods for detecting periodontal associations. Built into the simulations was the possible biological reality that a non-zero association between the two variables of interest (squared correlation coefficients, rho2, ranged from 0.1 to 0.9 depending on simulation), measured at 16 sites per subject, did not exist in all of 10 hypothetical subjects. The four methods for testing the null hypothesis that rho=0, or a related hypothesis; were: (1) Sites, analysis based on 160 sites incorrectly considered independent observations, (2) Subjects, analysis based on one score for each of 10 subjects; (3) Each subject, separate analyses based on sites within each of 10 subjects, family-wise type I (alpha) error corrected for multiplicity, and (4) the Each Subject method where P-levels were estimated using permutation procedures rather than t-distributions. Each Subject methods were found to have greater relative power (although there are differences in null hypotheses) under conditions of heterogeneity in rho and are considered to be particularly relevant in exploratory periodontal research when the primary interest is establishing the existence of a relationship, even if in only a subset of subjects. RP COHEN, ME (reprint author), USN,INST DENT RES,BLDG 1-H,GREAT LAKES,IL 60088, USA. NR 13 TC 0 Z9 0 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0301-5661 J9 COMMUNITY DENT ORAL JI Community Dentist. Oral Epidemiol. PD FEB PY 1993 VL 21 IS 1 BP 19 EP 23 DI 10.1111/j.1600-0528.1993.tb00712.x PG 5 WC Dentistry, Oral Surgery & Medicine; Public, Environmental & Occupational Health SC Dentistry, Oral Surgery & Medicine; Public, Environmental & Occupational Health GA KL949 UT WOS:A1993KL94900006 PM 8432099 ER PT J AU CONNOLLY, JP AF CONNOLLY, JP TI HEMODYNAMIC MEASUREMENTS DURING A TENSION PNEUMOTHORAX SO CRITICAL CARE MEDICINE LA English DT Article C1 USN HOSP,DEPT INTERNAL MED,PENSACOLA,FL. USN HOSP,DEPT INTENS CARE,PENSACOLA,FL. NR 6 TC 18 Z9 18 U1 0 U2 1 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0090-3493 J9 CRIT CARE MED JI Crit. Care Med. PD FEB PY 1993 VL 21 IS 2 BP 294 EP 296 DI 10.1097/00003246-199302000-00024 PG 3 WC Critical Care Medicine SC General & Internal Medicine GA KM480 UT WOS:A1993KM48000024 PM 8428484 ER PT J AU MITCHELL, CS OSBORN, RE GROSSKREUTZ, SR AF MITCHELL, CS OSBORN, RE GROSSKREUTZ, SR TI COMPUTED-TOMOGRAPHY IN THE HEADACHE PATIENT - IS ROUTINE EVALUATION REALLY NECESSARY SO HEADACHE LA English DT Article DE BRAIN; COMPUTED TOMOGRAPHY; HEADACHE ID COST-EFFECTIVENESS AB Objective. To determine the likelihood ratio of a positive computed tomogram of the brain in the routine evaluation of headache patients. Design. Consecutive patients with a chief complaint of headache were prospectively evaluated with computed tomography of the brain. Patients with headaches complicating other clinical disorders such as trauma, postictal state or known intracranial neoplasm were excluded. Setting. Military tertiary care center. Patients. Consecutive sample of 350 patients with a chief complaint of headache, regardless of the presence or absence of physical or neurologic signs, were referred for computed tomography of the brain. The patients were referred from a variety of inpatient and out patient settings. Results. Seven (2%) of the 350 patients had computed tomographic findings that were clinically significant. An additional 25 (7%) had positive computed tomographic findings, which were clinically insignificant for findings. All of the patients with significant computed tomographic findings had an abnormal physical or neurologic exam or unusual clinical symptoms. Conclusion. Routine computed tomography of the brain in headache patients with normal physical and neurologic exams and no unusual clinical symptoms has a low likelihood ratio for discovering significant intracranial disease. C1 USN HOSP,DEPT RADIOL,SAN DIEGO,CA 92134. NAVAL HOSP,DEPT RADIOL,OKINAWA,JAPAN. MERCY MED CTR,DEPT RADIOL,SPRINGFIELD,OH 45504. RP MITCHELL, CS (reprint author), USN HOSP,DEPT CLIN INVEST,SAN DIEGO,CA 92134, USA. NR 14 TC 41 Z9 41 U1 0 U2 2 PU AMER ASSOC STUDY HEADACHE PI WOODBURY PA 875 KINGS HIGHWAY, STE 200, WOODBURY, NJ 08096 SN 0017-8748 J9 HEADACHE JI Headache PD FEB PY 1993 VL 33 IS 2 BP 82 EP 86 DI 10.1111/j.1526-4610.1993.hed3302082.x PG 5 WC Clinical Neurology SC Neurosciences & Neurology GA KU756 UT WOS:A1993KU75600007 PM 8458727 ER PT J AU BOYER, JH HAAG, AM SATHYAMOORTHI, G SOONG, ML THANGARAJ, K PAVLOPOULOS, TG AF BOYER, JH HAAG, AM SATHYAMOORTHI, G SOONG, ML THANGARAJ, K PAVLOPOULOS, TG TI PYRROMETHENE-BF2 COMPLEXES AS LASER-DYES .2. SO HETEROATOM CHEMISTRY LA English DT Article AB Pyrromethene-BF2 complexes (P-BF2) 7 were obtained from alpha-unsubstituted pyrroles 5 by acylation and condensation to give intermediate pyrromethene hydrohalides 6 followed by treatment with boron trifluoride etherate. Conversion of ethyl alpha-pyrrolecarboxylates 4 to alpha-unsubstituted pyrroles 5 was brought about by thermolysis in phosphoric acid at 160-degrees-C, or by saponification followed by decarboxylation in ethanolamine at 180-degrees-C, or as unisolated intermediates in the conversion of esters 4 to pyrromethene hydrobromides 6 by heating in a mixture of formic and hydrobromic acids. Addition of hydrogen cyanide followed by dehydrogenation by treatment with bromine converted 3,5,3',5'-tetramethyl-4,4'-diethylpyrromethene hydrobromide 9 to 3,5,-3',5'-tetramethyl-4,4'-diethyl-6-cyanopyrromethene hydrobromide 6bb, confirmed by the further conversion to 1,3,5,7-tetra-methyl-2,6-diethyl-8-cyanopyrromethene-BF2 complex 7bb on treatment with boron trifluoride etherate. An alternation effect in the relative efficiency (PE) of laser activity in 1,3,5,7,8-pentamethyl-2,6-di-n-alkylpyrromethene-BF2 dyes depended on the number of methylene units in the n-alkyl substituent, -(CH2)nH, to give PE equal-to-or-greater-than 100 when n = 0,2,4 and RE 65, 85 when n = 1,3. (The PE 100 was arbitrarily assigned to the dye rhodamine 6G). The absence of fluorescence and laser activity in 1,3,5,7-tetramethyl-2,6-diethyl-8-isopropylpyrromethene-BF2 complex 7p and a markedly diminished fluorescence quantum yield (PHI 0.23) and lack of laser activity in 1,3,5,7-tetramethyl-2,6-diethyl-8-cyclohexylpyrromethene-BF2 complex 7q were attributed to molecular nonplanarity brought about by the steric interference between each of the two bulky 8-substituents with the 1,7-dimethyl substituents. An atypically low RE 20 for a peralkylated dye without steric interference was observed for 1,2,6,7-bistrimethylene-3,5,8-trimethylpyrromethene-BF2 complex 7j. Comparisons with peralkylated dyes revealed a major reduction in RE 0-40 for the six dyes 7u-z lacking substitution at the 8-position. Low laser activity RE was brought about by functional group (polar) substitution in the 2,6-diphenyl derivative 71, RE 20, and the 2,6-diacetamido derivative 7m, RE 5, of 1,3,5,7,8-pentamethylpyrromethene-BF2 complex (PMP-BF2) 7a and in 1,7-dimethoxy-2,3,5,6,8-pentamethylpyrromethene-BF2 complex 7n, RE 30. Diethyl 1,3,5,7-tetramethyl-8-cyanopyrromethene-2,6-dicarboxylate-BF2 complex, 7aa, and 1,3,5,7-tetramethyl-2,6-diethyl-8-cyanopyrromethene-BF, complex, 7bb, offered examples of P-BF2 dyes with electron withdrawing substituents at the 8-position. The dye 7aa, lambda(las) 617 nm, showed nearly twice the power efficiency that was obtained from rhodamine B, lambda(las) 611 nm. C1 USN,CTR OCEAN SYST,SAN DIEGO,CA 92152. RP BOYER, JH (reprint author), UNIV NEW ORLEANS,DEPT CHEM,NEW ORLEANS,LA 70148, USA. NR 35 TC 134 Z9 134 U1 8 U2 30 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 1042-7163 J9 HETEROATOM CHEM JI Heteroatom Chem. PD FEB PY 1993 VL 4 IS 1 BP 39 EP 49 DI 10.1002/hc.520040107 PG 11 WC Chemistry, Multidisciplinary SC Chemistry GA KU521 UT WOS:A1993KU52100006 ER PT J AU SITZMANN, ME ADOLPH, HG AF SITZMANN, ME ADOLPH, HG TI SYNTHESIS AND STABILITY OF 2,4,6-TRINITROBENZYLAMINE SO HETEROATOM CHEMISTRY LA English DT Article AB 2,4,6-Trinitrobenzylamine was synthesized via 2,4,6-trinitrophenylacetic acid and 2,4,6-trinitrobenzyl isocyanate. The title compound decomposes at room temperature but forms a stable hydrochloride and acetyl derivative. RP SITZMANN, ME (reprint author), USN,CTR SURFACE WARFARE,DIV ENERGET MAT,SILVER SPRING,MD 20903, USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 1042-7163 J9 HETEROATOM CHEM JI Heteroatom Chem. PD FEB PY 1993 VL 4 IS 1 BP 51 EP 53 DI 10.1002/hc.520040108 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA KU521 UT WOS:A1993KU52100007 ER PT J AU ATKINS, GP AF ATKINS, GP TI INTERVENTION IN THE CARIBBEAN - THE DOMINICAN CRISIS OF 1965 - PALMER,B SO HISPANIC AMERICAN HISTORICAL REVIEW LA English DT Book Review RP ATKINS, GP (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU DUKE UNIV PRESS PI DURHAM PA BOX 90660, DURHAM, NC 27708-0660 SN 0018-2168 J9 HISPANIC AM HIST REV JI Hisp. Am. Hist. Rev. PD FEB PY 1993 VL 73 IS 1 BP 188 EP 189 DI 10.2307/2517684 PG 2 WC History SC History GA KR105 UT WOS:A1993KR10500060 ER PT J AU EDWARDS, JE ROSENFELD, P THOMAS, PJ THOMAS, MD AF EDWARDS, JE ROSENFELD, P THOMAS, PJ THOMAS, MD TI WILLINGNESS TO RELOCATE FOR EMPLOYMENT - A SURVEY OF HISPANICS, NON-HISPANIC WHITES, AND BLACKS SO HISPANIC JOURNAL OF BEHAVIORAL SCIENCES LA English DT Article ID WORK FORCE AB Hispanics are underrepresented in many public- and private-sector organizations. This underrepresentation has led to calls for intensified targeted recruiting of Hispanics. The success of such recruiting efforts partially depends on the degree to which Hispanics are willing to relocate for employment. The present study compared the geographic mobility of Hispanics (N = 704), non-Hispanic Whites (N = 525), and Blacks (N = 149). Persons who were applying for civil service jobs or taking civil service examinations in Corpus Christi, Texas, completed a survey that assessed their likelihood of moving for employment. The results showed that Hispanics were as willing as Blacks and non-Hispanic Whites to relocate if incentives were high or the new employment areas had high Hispanic concentrations. If the new employment area did not have a high percentage of Hispanics, then Hispanics frequently indicated significantly less intention to move than did non-Hispanic Whites. RP EDWARDS, JE (reprint author), USN,CTR PERSONNEL RES & DEV,WOMEN & MULTICULTURAL RES OFF,WASHINGTON,DC 20350, USA. NR 18 TC 4 Z9 4 U1 0 U2 0 PU SAGE PUBLICATIONS INC PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 SN 0739-9863 J9 HISPANIC J BEHAV SCI JI Hisp. J. Behav. Sci. PD FEB PY 1993 VL 15 IS 1 BP 121 EP 133 DI 10.1177/07399863930151007 PG 13 WC Psychology, Multidisciplinary SC Psychology GA KG660 UT WOS:A1993KG66000007 ER PT J AU ODYA, CE YAPA, R SOLTANITEHRANI, B CARLIN, RJ LEE, CH AF ODYA, CE YAPA, R SOLTANITEHRANI, B CARLIN, RJ LEE, CH TI MONOCLONAL LIGAND-BINDING SITE RELATED ANTIIDIOTYPIC ANTIBODIES ELICITED WITH A POLYCLONAL KININ ANTIBODY SO HYBRIDOMA LA English DT Article ID INTERNAL IMAGE; ANGIOTENSIN-II; RECEPTOR; BRADYKININ AB Splenocytes from mice immunized with homogenous, polyclonal, rabbit kinin antibody (BK21) were fused using polyethylene glycol with the mouse myeloma cell line SP2/o. Eleven monoclonal antibodies, whose binding to BK21 could be inhibited by bradykinin, were obtained from 3 fusions. All of these anti-idiotypic antibodies were of the IgG1k isotype, except for one, which was an IgG2ak. An IgM(k), auto-anti-idiotypic antibody, reactive with BK21 was obtained from a fusion of SP2/o cells and splenocytes from a mouse immunized with bradykinin conjugated with carbodiimide to keyhole limpet hemocyanin. Bradykinin could completely inhibit the binding of all of the anti-idiotypic antibodies to BK21 in an enzyme-linked immunosorbent assay. This result is consistent with the anti-idiotypic antibodies being reactive with the ligand binding sites of BK21. It was possible to separate the anti-idiotypic antibodies into 2 groups. The first group, 10 of the 12 antibodies tested, was more sensitive to inhibition by bradykinin than the second group and was not readily inhibited by des-Arg9-bradykinin. The second group was about 7 times more sensitive to inhibition by des-Arg9-bradykinin than by bradykinin. Further experiments will be needed to determine whether or not these monoclonal anti-idiotypic antibodies are ''internal image'' antibodies. C1 USN,NATL MED CTR,MED RES INST,DEPT CASUALTY CARE RES,BETHESDA,MD 20889. RP ODYA, CE (reprint author), INDIANA UNIV,SCH MED,PHARMACOL SECT,MED SCI PROGRAM,MYERS HALL,ROOM 306,BLOOMINGTON,IN 47405, USA. OI soltani tehrani, bahram/0000-0003-2685-8606 FU NHLBI NIH HHS [HL 38833] NR 21 TC 0 Z9 0 U1 0 U2 0 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 0272-457X J9 HYBRIDOMA JI Hybridoma PD FEB PY 1993 VL 12 IS 1 BP 45 EP 53 DI 10.1089/hyb.1993.12.45 PG 9 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Immunology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Immunology GA KN267 UT WOS:A1993KN26700004 PM 8454303 ER PT J AU ALLEN, R ESTEROWITZ, L AGGARWAL, I AF ALLEN, R ESTEROWITZ, L AGGARWAL, I TI AN EFFICIENT 1.46 MU-M THULIUM FIBER LASER VIA A CASCADE PROCESS SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Letter AB CW lasing in a thulium-doped fluorozirconate fiber at 1.46 mum with 20% slope efficiency was observed. Simultaneous lasing at 1.86 mum with 29% slope efficiency serves to depopulate the normally long lived 1.46 mum terminal level. RP ALLEN, R (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 5 TC 16 Z9 17 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD FEB PY 1993 VL 29 IS 2 BP 303 EP 306 DI 10.1109/3.199282 PG 4 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA KQ480 UT WOS:A1993KQ48000001 ER PT J AU BARONAVSKI, AP LADOUCEUR, HD SHAW, JK AF BARONAVSKI, AP LADOUCEUR, HD SHAW, JK TI ANALYSIS OF CROSS-CORRELATION, PHASE-VELOCITY MISMATCH, AND GROUP-VELOCITY MISMATCHES IN SUM-FREQUENCY GENERATION SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article ID AUTO-CORRELATION; PULSES AB Sum-frequency generation obtained by phase-matched optical pulses of different profiles and unequal pulse widths and frequencies is analyzed. Expressions are obtained which indicate the exact dependence of field and intensity upon phase mismatch, crystal thickness and group velocity mismatches between the fundamental pulses and between fundamental and the sum frequency pulses. The expressions reduce to known results in the case of replica fundamental pulses, in which case autocorrelation is used. A rigorous model is derived and, in the case where the group velocity mismatch between incident and generated pulses for a specific profile can be neglected, analytical and numerical treatments are given. New results of an asymptotic nature are derived for the standard cross correlation of squared hyperbolic secant pulses on the basis of which a novel numerical recipe is obtained. Specifically, the simple formula DELTA(tau) almost-equal-to (DELTAt1p + DELTAt2p)1/p, p = 1.615, is found, where DELTAt1, DELTAt2, and DELTAtau are the full width half maximum of two incident pulses and their cross-correlation intensity, respectively. C1 VIRGINIA POLYTECH INST & STATE UNIV,DEPT MATH,BLACKSBURG,VA 24061. RP BARONAVSKI, AP (reprint author), USN,RES LAB,DIV CHEM,CODE 6110,WASHINGTON,DC 20375, USA. NR 11 TC 22 Z9 26 U1 4 U2 9 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD FEB PY 1993 VL 29 IS 2 BP 580 EP 589 DI 10.1109/3.199312 PG 10 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA KQ480 UT WOS:A1993KQ48000031 ER PT J AU LEVY, M ILIC, I SCARMOZZINO, R OSGOOD, RM WOLFE, R GUTIERREZ, CJ PRINZ, GA AF LEVY, M ILIC, I SCARMOZZINO, R OSGOOD, RM WOLFE, R GUTIERREZ, CJ PRINZ, GA TI THIN-FILM-MAGNET MAGNETOOPTIC WAVE-GUIDE ISOLATOR SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article ID GUIDE AB Recent advances in thin-film-magnet and Bi-YIG film technologies have opened up the possibility of fabricating very compact magnetooptic structures. In this letter we demonstrate for the first time that these new technologies can be brought together to make a thin-film-magnet magnetooptic isolator for use in optical packaging and integrated optical circuits. The device operates at a 1.55 mum wavelength and uses a waveguide etched into a Bi-YIG film whose linear birefringence has been tuned to near zero at this wavelength. The Bi-YIG's magnetization is saturated by a thin ferromagnetic film. Isolation ratios of -21 dB have been obtained. C1 AT&T BELL LABS,MURRAY HILL,NJ 07974. USN,RES LAB,WASHINGTON,DC 20375. RP LEVY, M (reprint author), COLUMBIA UNIV,MICROELECTR SCI LAB,NEW YORK,NY 10027, USA. NR 8 TC 24 Z9 24 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD FEB PY 1993 VL 5 IS 2 BP 198 EP 200 DI 10.1109/68.196003 PG 3 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA KN746 UT WOS:A1993KN74600028 ER PT J AU LANGWORTHY, JB AF LANGWORTHY, JB TI THE EFFECTS OF FUNNELING ON SPACE UPSET RATE SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article ID N-TYPE; CHARGE AB The complete three dimensional analog of the usual upset rate integral is explored, exhibiting explicitly the average over solid angle which is often finessed or ignored. This permits a precise statement of how funneling can be included in the chord distribution and an approximation is written which applies directly to the usual formalism. The mixed way that measured funneling contributes or does not contribute to input quantities is analyzed and an algorithm is developed which includes funneling. Examples show what effects funneling adds to the no funneling case and impact is discussed. This is the first systematic inclusion of funneling in space upset rate. RP LANGWORTHY, JB (reprint author), USN,RES LAB,DIV CONDENSED MATTER & RADIAT SCI,RADIAT EFFECTS BRANCH,WASHINGTON,DC 20375, USA. NR 10 TC 2 Z9 2 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD FEB PY 1993 VL 40 IS 1 BP 63 EP 72 DI 10.1109/23.199488 PG 10 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA KN089 UT WOS:A1993KN08900008 ER PT J AU LIU, X UMSTADTER, D ESAREY, E TING, A AF LIU, X UMSTADTER, D ESAREY, E TING, A TI HARMONIC-GENERATION BY AN INTENSE LASER-PULSE IN NEUTRAL AND IONIZED-GASES SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID RADIATION; XENON; IONIZATION; PLASMAS AB Reported are the results of a harmonic generation experiment in a simple gas (hydrogen) using 1-ps, 1-mum laser pulses with a range of intensities extending from below to far above the laser ionization saturation threshold. The scaling with intensity above saturation of the third harmonic generated by a single laser-pulse in a filled gas cell is observed to not fit with a simple model that takes into consideration volume ionization effects alone. In another experiment, a pump-probe type, an upper limit on the conversion efficiency of third harmonic generation in a preformed plasma is determined. It is found to be in agreement with the efficiency predicted by a relativistic harmonic generation theory. C1 USN,RES LAB,BEAM PHYS BRANCH,WASHINGTON,DC 20375. RP LIU, X (reprint author), UNIV MICHIGAN,CTR ULTRAFAST OPT SCI,ANN ARBOR,MI 48109, USA. RI Umstadter, Donald/A-1581-2016 OI Umstadter, Donald/0000-0002-2182-4346 NR 22 TC 51 Z9 51 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0093-3813 J9 IEEE T PLASMA SCI JI IEEE Trans. Plasma Sci. PD FEB PY 1993 VL 21 IS 1 BP 90 EP 94 DI 10.1109/27.221106 PG 5 WC Physics, Fluids & Plasmas SC Physics GA LD709 UT WOS:A1993LD70900011 ER PT J AU ESAREY, E TING, A SPRANGLE, P UMSTADTER, D LIU, X AF ESAREY, E TING, A SPRANGLE, P UMSTADTER, D LIU, X TI NONLINEAR-ANALYSIS OF RELATIVISTIC HARMONIC-GENERATION BY INTENSE LASERS IN PLASMAS SO IEEE TRANSACTIONS ON PLASMA SCIENCE LA English DT Article ID CHIRPED-PULSE AMPLIFICATION; ELECTROMAGNETIC-WAVES; RARE-GASES; RADIATION; IONIZATION; ACCELERATOR; COMPRESSION; BEAMS AB A linearly polarized, ultra-intense laser field induces transverse plasma currents which are highly relativistic and nonlinear, resulting in the generation of coherent harmonic radiation in the forward direction (i.e., co-propagating with the incident laser field). A nonlinear cold fluid model, valid for ultrahigh intensities, is formulated and used to analyze relativistic harmonic generation. The plasma density response is included self-consistently and is shown to significantly reduce the current driving the harmonic radiation. Phase detuning severely limits the growth of the harmonic radiation. The effects of diffraction are considered in the mildly relativistic limit. No third harmonic signal will emerge from a uniform plasma of near infinite extent. A finite third harmonic signal requires the use of a semi-infinite or finite slab plasma. For an initially uniform plasma, no second harmonic radiation is generated. Generation of even harmonics requires transverse gradients in the initial plasma density profile. C1 UNIV MICHIGAN,CTR ULTRAFAST OPT SCI,ANN ARBOR,MI 48109. RP ESAREY, E (reprint author), USN,RES LAB,DIV PLASMA PHYS,BEAM PHYS BRANCH,WASHINGTON,DC 20375, USA. RI Umstadter, Donald/A-1581-2016 OI Umstadter, Donald/0000-0002-2182-4346 NR 46 TC 133 Z9 136 U1 2 U2 7 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0093-3813 J9 IEEE T PLASMA SCI JI IEEE Trans. Plasma Sci. PD FEB PY 1993 VL 21 IS 1 BP 95 EP 104 DI 10.1109/27.221107 PG 10 WC Physics, Fluids & Plasmas SC Physics GA LD709 UT WOS:A1993LD70900012 ER PT J AU BROWN, WA LOOMIS, HH AF BROWN, WA LOOMIS, HH TI DIGITAL IMPLEMENTATIONS OF SPECTRAL CORRELATION ANALYZERS SO IEEE TRANSACTIONS ON SIGNAL PROCESSING LA English DT Article ID MODULATED SIGNALS AB The spectral correlation function plays a central role in the analysis and design of signal processing systems operating on cyclostationary signals. In applications such as detecting the presence of a cyclostationary signal buried in noise and interference, estimation of the spectral correlation function is an integral part of the required processing. This paper addresses the issues involved in the design of computationally efficient algorithms for spectral correlation estimation and the resulting impact on high-speed digital realization. First, to develop the theoretical framework for understanding the realizations studied, the spectral correlation analyzer is characterized as a periodically time-varying quadratic system with a kernel possessing certain gross properties. The mean and variance of the output are expressed in terms of the kernel and the spectral correlation function of the input. Then, three realizations, each with different advantages, are analyzed in detail. One approach is based on the frequency-smoothing method of cross spectral analysis. The remaining approaches are variants of the time-smoothing method in which the time-smoothing integral is transformed into a Fourier transform operation. For each of these realizations, an exact expression for the quadratic system kernel is given, the digital implementation is developed, and a detailed complexity analysis is presented. High speed pipeline realizations of the algorithms are analyzed, and related special issues are discussed. Finally, examples involving the calculation of the spectral correlation function in near-real time for broad-band communications signals are presented and discussed. C1 NAVAL POST GRAD SCH,MONTEREY,CA 93943. RP BROWN, WA (reprint author), MISSION RES CORP,MONTEREY,CA 93940, USA. NR 17 TC 25 Z9 34 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1053-587X J9 IEEE T SIGNAL PROCES JI IEEE Trans. Signal Process. PD FEB PY 1993 VL 41 IS 2 BP 703 EP 720 DI 10.1109/78.193211 PG 18 WC Engineering, Electrical & Electronic SC Engineering GA KL823 UT WOS:A1993KL82300017 ER PT J AU SUBRAHMANYAM, MB AF SUBRAHMANYAM, MB TI SYNTHESIS OF SUBOPTIMAL H-INFINITY CONTROLLERS OVER A FINITE-HORIZON SO INTERNATIONAL JOURNAL OF CONTROL LA English DT Article AB In this paper a finite horizon H(infinity) optimal control problem is posed and solved. It is shown by way of examples that the finite horizon performance is useful for the fast computation of the infimal H(infinite) norm in the infinite interval case. Also, a differential equation is derived for the measure of performance. A general suboptimal control problem is then posed and an expression for a suboptimal controller is derived solving the saddle point conditions. An expression for a feedback controller can be derived by solving a dynamic Riccati equation. In the time-invariant case, the finite horizon controller converges to a static controller as the final time becomes large. Examples are given to illustrate the usefulness of the theory. RP SUBRAHMANYAM, MB (reprint author), USN,CTR AIR WARFARE,DIV AIRCRAFT,FLIGHT CONTROL,CODE 6012,WARMINSTER,PA 18974, USA. NR 13 TC 1 Z9 1 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0020-7179 J9 INT J CONTROL JI Int. J. Control PD FEB PY 1993 VL 57 IS 2 BP 351 EP 363 DI 10.1080/00207179308934392 PG 13 WC Automation & Control Systems SC Automation & Control Systems GA KL950 UT WOS:A1993KL95000007 ER PT J AU SUBRAHMANYAM, MB AF SUBRAHMANYAM, MB TI GENERAL FORMULAS FOR SUBOPTIMAL H-INFINITY CONTROL OVER A FINITE-HORIZON SO INTERNATIONAL JOURNAL OF CONTROL LA English DT Article AB A general suboptimal control problem is posed and an expression for a suboptimal controller is derived solving the saddle point conditions. An expression for a state feedback suboptimal controller can be derived by solving a dynamic Riccati equation. Then, an expression for a suboptimal output feedback controller is developed in a general case via the solution of two dynamic Riccati equations. RP SUBRAHMANYAM, MB (reprint author), USN,CTR AIR WARFARE,DIV AIRCRAFT,FLIGHT CONTROL,CODE 6012,WARMINSTER,PA 18974, USA. NR 13 TC 2 Z9 2 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0020-7179 J9 INT J CONTROL JI Int. J. Control PD FEB PY 1993 VL 57 IS 2 BP 365 EP 375 DI 10.1080/00207179308934393 PG 11 WC Automation & Control Systems SC Automation & Control Systems GA KL950 UT WOS:A1993KL95000008 ER PT J AU COLOMBANT, DG LAU, YY FRIEDMAN, M KRALL, J SERLIN, V AF COLOMBANT, DG LAU, YY FRIEDMAN, M KRALL, J SERLIN, V TI RF CONVERTER SIMULATION-IMPOSITION OF THE RADIATION CONDITION SO INTERNATIONAL JOURNAL OF INFRARED AND MILLIMETER WAVES LA English DT Article AB The transmission coefficient of a radiating horn is calculated. The calculation imposes a radiation condition at large distances. It employs the boundary integral method developed by Bernstein and Rokhlin. It is performed in the frequency domain and assumes axial symmetry. We discuss the dependence of rf transmission for the horn geometry that is used in the relativistic klystron amplifier experiments at the Naval Research Laboratory. RP COLOMBANT, DG (reprint author), USN,RES LAB,DIV PLASMA PHYS,WASHINGTON,DC 20375, USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0195-9271 J9 INT J INFRARED MILLI JI Int. J. Infrared Millimeter Waves PD FEB PY 1993 VL 14 IS 2 BP 335 EP 346 DI 10.1007/BF02282076 PG 12 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA KL946 UT WOS:A1993KL94600014 ER PT J AU MAKEIG, S AF MAKEIG, S TI GAMMA-BAND EVENT-RELATED BRAIN DYNAMICS - HISTORIC PERSPECTIVE SO INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY LA English DT Meeting Abstract C1 USN,HLTH RES CTR,SAN DIEGO,CA 92152. NR 0 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-8760 J9 INT J PSYCHOPHYSIOL JI Int. J. Psychophysiol. PD FEB PY 1993 VL 14 IS 2 BP 136 EP 136 DI 10.1016/0167-8760(93)90202-Z PG 1 WC Psychology, Biological; Neurosciences; Physiology; Psychology; Psychology, Experimental SC Psychology; Neurosciences & Neurology; Physiology GA KU039 UT WOS:A1993KU03900095 ER PT J AU MALONE, JD SMITH, ES SHEFFIELD, J BIGELOW, D HYAMS, KC BEARDSLEY, SG LEWIS, RS ROBERTS, CR AF MALONE, JD SMITH, ES SHEFFIELD, J BIGELOW, D HYAMS, KC BEARDSLEY, SG LEWIS, RS ROBERTS, CR TI COMPARATIVE-EVALUATION OF 6 RAPID SEROLOGICAL TESTS FOR HIV-1 ANTIBODY SO JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES AND HUMAN RETROVIROLOGY LA English DT Article DE HIV-1; ANTIBODY; UNITED-STATES MILITARY; SEROLOGICAL ASSAYS ID HUMAN-IMMUNODEFICIENCY-VIRUS; DEVELOPING-COUNTRIES; AGGLUTINATION ASSAY; SCREENING ASSAYS; SEROPOSITIVITY AB Six commercial rapid test kits for HIV-1 antibody were evaluated. Four laboratory technologists tested sera from four groups of U.S. military personnel or dependents: 202 subjects positive tor HIV-1 antibody by Western blot, 200 seronegative voluntary blood donors, 199 seronegative obstetrics/gynecology patients. and 99 subjects with sera reactive by ELISA but negative by recombinant protein EIA and indeterminate by Western blot. The three tests using solid-phase immunoassay technology demonstrated the highest mean sensitivity (>99%) and specificity (>91%) for all groups tested, including sera indeterminate by Western blot. Two dot-immunoblot assays were less specific, possibly due to indistinct reaction end points, and a latex agglutination assay was also less specific because of difficulty distinguishing reactive results from the granular background. In an ''ease-of-use'' assessment, solid-phase capture immunoassays required less time and equipment and were easier to interpret than other testing methods. Solid-phase capture immunoassays for HIV-1 antibody may be suitable for use in emergency situations and in developing countries because they are highly sensitive and specific and are rapidly performed with minimal laboratory equipment. C1 BROOKE ARMY MED CTR,SAN ANTONIO,TX. WALTER REED ARMY INST RES,ROCKVILLE,MD. WALTER REED ARMY INST RES,DIV RETROVIROL,DEPT DIAGNOST RETROVIROL,WASHINGTON,DC 20307. USN,MED RES INST,BETHESDA,MD 20814. RP MALONE, JD (reprint author), USN,NATL MED CTR,DIV INFECT DIS,BETHESDA,MD 20014, USA. NR 11 TC 38 Z9 38 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 1077-9450 J9 J ACQ IMMUN DEF SYND JI J. Acquir. Immune Defic. Syndr. Hum. Retrovirol. PD FEB PY 1993 VL 6 IS 2 BP 115 EP 119 PG 5 WC Immunology; Infectious Diseases SC Immunology; Infectious Diseases GA KK252 UT WOS:A1993KK25200002 PM 8433277 ER PT J AU LEE, WM UHM, HS AF LEE, WM UHM, HS TI EFFECT OF TEMPERATURE-GRADIENT ON CONCENTRATION PROFILE OF HYDROGEN IN A PALLADIUM LATTICE SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID METALS; ALLOYS AB A thermodynamic calculation is conducted to determine the distribution of hydrogen atoms absorbed in a one-dimensional palladium rod, along which a temperature gradient is imposed. The rod is assumed to be completely sealed, so that the total number of the hydrogen atoms is conserved regardless of its thermal conditions. A model calculation based on a zeroth-order interaction model predicts that upon the imposition of the gradient, the hydrogen distribution will significantly change from its initial uniformity. The profile of the redistributed hydrogen can be discontinuous at one point on the rod. The concentration gap developed at this point of temperature T implies that the two-phase region in the palladium hydride phase under the thermal equilibrium is nonexistent under the nonequilibrium condition. Similar to the disappearance of the two-phase region above the critical temperature, the concentration gap is reduced with an increase of the temperature gradient. RP LEE, WM (reprint author), USN,CTR SURFACE WARFARE,WHITE OAK LAB,SILVER SPRING,MD 20903, USA. NR 18 TC 3 Z9 3 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 FEB 1 PY 1993 VL 73 IS 3 BP 1011 EP 1017 DI 10.1063/1.353318 PG 7 WC Physics, Applied SC Physics GA KK921 UT WOS:A1993KK92100001 ER PT J AU FATEMI, M CHAUDHURI, J MITTEREDER, J CHRISTOU, A AF FATEMI, M CHAUDHURI, J MITTEREDER, J CHRISTOU, A TI X-RAY DOUBLE-CRYSTAL ANALYSIS OF MISORIENTATION AND STRAIN IN GAAS/SI AND RELATED HETEROSTRUCTURES SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SI AB A detailed x-ray double-crystal-diffractometry investigation of GaAs on Si tilted towards [110] direction has been carried out to understand the structure, misorientation, and residual stress present in this system. The structure of the GaAs epilayer is approximately triclinic, with the in-plane lattice parameters a and b being in most cases slightly larger than, and that along the growth direction c less than, the bulk GaAs. For vicinal angles between 0-degrees and 5-degrees, a tilt angle of up to 0.12-degrees between GaAs and Si lattice is observed, inclined mostly in the same direction as the vicinal angle, but also having a small component in a perpendicular direction. A residual tensile stress of the order of 10(9) dyn/cm2 exists in the epilayer, which can be accounted for by the difference in the thermal expansion coefficients of GaAs and Si. The strain due to the lattice parameter mismatch between the two materials is found to be negligibly small. C1 WICHITA STATE UNIV, DEPT MECH ENGN, WICHITA, KS 67208 USA. SACHS FREEMAN ASSOCIATES INC, LANDOVER, MD 20785 USA. UNIV MARYLAND, CALCE, CTR ELECTR PACKAGING, COLL PK, MD 20742 USA. RP FATEMI, M (reprint author), USN, RES LAB, WASHINGTON, DC 20375 USA. RI Chaudhuri, Jharna/E-8863-2013 NR 15 TC 21 Z9 23 U1 1 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD FEB 1 PY 1993 VL 73 IS 3 BP 1154 EP 1160 DI 10.1063/1.353282 PG 7 WC Physics, Applied SC Physics GA KK921 UT WOS:A1993KK92100024 ER PT J AU CALAME, JP GRAY, HF SHAW, JL AF CALAME, JP GRAY, HF SHAW, JL TI ANALYSIS AND DESIGN OF MICROWAVE-AMPLIFIERS EMPLOYING FIELD-EMITTER ARRAYS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID EMISSION; SIMULATION; TUBES AB An analysis of the microwave (f > 1 GHz) properties of field-emitter arrays (FEAs) and several representative medium power (10-100 W) microwave amplifiers employing FEAs is presented. The FEA analysis is limited to parallel-plate structures having discrete pointlike vertical emitter tips and gate apertures aligned to each tip. A transmission line analysis of wave propagation in this structure is presented and used to evaluate the geometries and materials needed for microwave operation. This analysis is used to investigate the performance capabilities and emitter requirements of both modulated-emission linear beam tubes and microdevices based on FEAs. Specific microtriode designs are used to investigate practical problems such as space charge and thermal effects. Competitive performance should be achievable in gated-emission linear beam tubes by using FEAs that perform at levels previously reported by several laboratories. Existing FEA technology (currents of 10 muA per emitter, transconductances of 1 muS per emitter, 1 mum oxide thickness, and 3 mum emitter spacing) is suitable for use in cavity klystrodes(R) at frequencies through 10 GHz, and in moderately bunched beam (bunch width of 180-degrees), octave-bandwidth traveling-wave-tube applications through 3 GHz. Extending the operating frequency and/or reducing the bunch width will require a larger ratio of transconductance to current. Microtriodes operating at 10 GHz will benefit from a modified FEA structure and improved emitter performance. An extra acceleration electrode must be added above the gate aperture to alleviate problems due to space charge between the gate and collector, and the gate oxide thickness must be increased 10 at least 2 mum. A FEA incorporating these features and capable of producing 5 muS and 100 muA per emitter could generate 130 W from a 5-mm-wide device with 8.6 dB gain, 7% bandwidth, and 36% power added efficiency. To allow higher gain and wideband operation, the transconductance at a given current must be increased. A FEA capable of producing 5 muS at only 10 muA per emitter would result in a microtriode with more than 1 octave bandwidth, 45 W output power, 10 dB gain, and 34% power added efficiency. Anode-to-case temperature differences of less than 100-degrees-C appear possible in this device if BeO is used as the dielectric. RP CALAME, JP (reprint author), USN,RES LAB,VACUUM ELECTR BRANCH,WASHINGTON,DC 20375, USA. NR 37 TC 52 Z9 52 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 FEB 1 PY 1993 VL 73 IS 3 BP 1485 EP 1504 DI 10.1063/1.353223 PG 20 WC Physics, Applied SC Physics GA KK921 UT WOS:A1993KK92100072 ER PT J AU DRISKELL, JE OLMSTEAD, B SALAS, E AF DRISKELL, JE OLMSTEAD, B SALAS, E TI TASK CUES, DOMINANCE CUES, AND INFLUENCE IN TASK GROUPS SO JOURNAL OF APPLIED PSYCHOLOGY LA English DT Article ID SEX-ROLE STEREOTYPES; SUPERVISORY BEHAVIOR; SOCIAL-INFLUENCE; GENDER; STYLE; LEADERSHIP AB Both basic and applied research indicates that women are generally seen as less competent and are less influential in task groups than men. Two studies were conducted, with both female and male speakers, to examine the effectiveness of influence attempts when displaying task cues (behaviors that imply ability or task competence) or dominance cues (attempts to influence or control through threat). Results indicated a significant positive effect of task cues on perceived competence and actual influence, whereas the display of dominance cues was ineffective in gaining status and influence and resulted in negative reactions from others. Furthermore, this pattern held for female and male speakers. These results suggest that the display of task cues is an effective means to enhance one's status in groups and that the attempt to gain influence in task groups through dominance is an ineffective and poorly received strategy for both men and women. C1 SCHROEDER FLYNN & CO,ORLANDO,FL. USN,CTR TRAINING SYST,ORLANDO,FL. RP DRISKELL, JE (reprint author), FLORIDA MAXIMA CORP,147 E LYMAN AVE,WINTER PK,FL 32789, USA. NR 31 TC 62 Z9 62 U1 0 U2 9 PU AMER PSYCHOLOGICAL ASSOC PI WASHINGTON PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 SN 0021-9010 J9 J APPL PSYCHOL JI J. Appl. Psychol. PD FEB PY 1993 VL 78 IS 1 BP 51 EP 60 DI 10.1037//0021-9010.78.1.51 PG 10 WC Psychology, Applied; Management SC Psychology; Business & Economics GA KN941 UT WOS:A1993KN94100006 ER PT J AU MAY, DA HAWKINS, JD PICKETT, RL AF MAY, DA HAWKINS, JD PICKETT, RL TI DETECTING GULF-OF-MEXICO OCEANOGRAPHIC FEATURES IN SUMMER USING AVHRR CHANNEL-3 SO JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY LA English DT Article AB Efforts to monitor the Gulf of Mexico Loop Current and mesoscale ocean features using IR satellite imagery in the summertime have been significantly hindered by 1) strong surface heating that masks surface frontal gradients and 2) extremely high atmospheric water vapor attenuation that lowers effective satellite brightness-temperature values. These problems can now be addressed, provided high-quality multichannel infrared data are available during nighttime satellite passes. The National Oceanic and Atmospheric Administration (NOAA) Advanced Very High Resolution Radiometer (AVHRR) consists of three IR channels that include channels 3 (3.55-3.93 mum), 4 (10.3-11.3 mum), and 5 (11.5-12.5 mum). Of these, channel 3 is least affected by water vapor attenuation, making it better suited for viewing the ocean through a humid atmosphere. All satellites prior to NOAA-11, however, experienced substantial noise in channel 3 soon after launch, rendering the channel relatively useless for long-term oceanographic monitoring. NOAA-11, with a high-quality 3.7-mum channel, has enabled us to detect Loop Current and eddy features throughout the typical worst summertime conditions. A three-channel cross-product sea surface temperature (CPSST) algorithm was applied to nighttime images in August and September 1990 to monitor the Loop Current, a major warm-core eddy (Quiet Eddy), and a minor warm-core eddy (Quiet Eddy II). Feature locations are verified using drifting data buoys. This capability demonstrates the importance of a low-noise AVHRR channel 3, and will increase our knowledge about Loop Current dynamics and ring periodicity during periods previously unfavorable for IR images. RP MAY, DA (reprint author), USN,DEPT NAVY,RES LAB,BAY ST LOUIS,MS 39529, USA. NR 0 TC 5 Z9 5 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0739-0572 J9 J ATMOS OCEAN TECH JI J. Atmos. Ocean. Technol. PD FEB PY 1993 VL 10 IS 1 BP 64 EP 75 DI 10.1175/1520-0426(1993)010<0064:DGOMOF>2.0.CO;2 PG 12 WC Engineering, Ocean; Meteorology & Atmospheric Sciences SC Engineering; Meteorology & Atmospheric Sciences GA LM203 UT WOS:A1993LM20300006 ER PT J AU BOYD, JD LINZELL, RS AF BOYD, JD LINZELL, RS TI THE TEMPERATURE AND DEPTH ACCURACY OF SIPPICAN T-5 XBTS SO JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY LA English DT Note AB Thirty-four near-simultaneous pairs of CTD and Sippican model T-5 XBT profiles were obtained during an experiment in the Sargasso Sea during the summer of 1991. The data were analyzed to assess the temperature and fall-rate accuracies of the T-5 probes. The XBT temperatures averaged 0.07-degrees-C warmer than CTD temperatures, with some suggestion that the offset might be different for different acquisition systems and that it might be slightly temperature or pressure dependent. When the offset was removed, the differences between CTD and XBT temperatures had a standard deviation of about 0.08-degrees-C over a temperature range of 3-degrees-29-degrees-C. An improved elapsed fall-time-to-depth conversion equation for Sippican T-5's in the Sargasso Sea was found to be z = 6.705t - 0.001619t2, with z the depth in meters and t the elapsed fall time of the probe in seconds. The standard deviation of depth was about 8 m over a depth range of 0 to approximately 1800 m. A cubic fit to the data was equally good or slightly better. Whether a geographically universal fall-rate equation can be devised for each model XBT is still unclear. In addition, now that a number of different manufacturers are introducing their versions of XBTs and XBT acquisition systems onto the market, unresolved questions exist regarding the differences in data taken with these different models. RP BOYD, JD (reprint author), USN,RES LAB,CODE 7332,BAY ST LOUIS,MS 39529, USA. NR 0 TC 15 Z9 15 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0739-0572 J9 J ATMOS OCEAN TECH JI J. Atmos. Ocean. Technol. PD FEB PY 1993 VL 10 IS 1 BP 128 EP 136 DI 10.1175/1520-0426(1993)010<0128:TTADAO>2.0.CO;2 PG 9 WC Engineering, Ocean; Meteorology & Atmospheric Sciences SC Engineering; Meteorology & Atmospheric Sciences GA LM203 UT WOS:A1993LM20300012 ER PT J AU KOUBEK, E LAMBERT, JL AF KOUBEK, E LAMBERT, JL TI DEMONSTRATION OF THE COMMON ION EFFECT SO JOURNAL OF CHEMICAL EDUCATION LA English DT Article C1 KANSAS STATE UNIV AGR & APPL SCI,MANHATTAN,KS 66506. RP KOUBEK, E (reprint author), USN ACAD,ANNAPOLIS,MD 21401, USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0021-9584 J9 J CHEM EDUC JI J. Chem. Educ. PD FEB PY 1993 VL 70 IS 2 BP 155 EP 155 PG 1 WC Chemistry, Multidisciplinary; Education, Scientific Disciplines SC Chemistry; Education & Educational Research GA KT436 UT WOS:A1993KT43600032 ER PT J AU SIMAKASKI, M HEGEDUS, CR AF SIMAKASKI, M HEGEDUS, CR TI A METHODOLOGY FOR EVALUATING THE TOTAL PERFORMANCE OF COATINGS AND COATING SYSTEMS SO JOURNAL OF COATINGS TECHNOLOGY LA English DT Article AB Coatings technologists are frequently asked to develop or select an optimum coating or coating system for a specific application. In most cases the intended application places several demands on the coating(s) which in turn must display numerous properties. Even when several coatings meet all of the fundamental requirements, it is usually desirable to identify the material which will out-perform the others. This decision-making process becomes difficult when property trade-offs exist. A methodology to quantitatively and consistently evaluate the cumulative effects of a number of coating (or coating system) properties on overall performance has been developed. This analysis is based on the Zero-Max Technique which converts property values to an equivalent scale for comparative purposes. A weighting value which is representative of property importance on overall performance is also determined and utilized to obtain an overall Total Performance Evaluation (TPE) rating. This approach has been demonstrated in the selection of an optimum binder system for a self-priming topcoat for military ground equipment. The demonstration illustrates that the TPE can be used to determine statistical differences between overall coating performance. The methodology is applicable to all areas of coating characterization and selection. C1 USN,CTR AIR WARFARE,DIV AEROSP MAT,WARMINSTER,PA 18974. RP SIMAKASKI, M (reprint author), DREXEL UNIV,DEPT CHEM ENGN,PHILADELPHIA,PA 19140, USA. NR 15 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION SOC COATING TECH PI BLUE BELL PA 492 NORRISTOWN ROAD, BLUE BELL, PA 19422 SN 0361-8773 J9 J COATING TECHNOL JI J. Coat. Technol. PD FEB PY 1993 VL 65 IS 817 BP 51 EP 58 PG 8 WC Chemistry, Applied; Materials Science, Coatings & Films SC Chemistry; Materials Science GA KN832 UT WOS:A1993KN83200002 ER PT J AU STEINER, TD HENGEHOLD, RL YEO, YK GODBEY, DJ THOMPSON, PE POMRENKE, GS AF STEINER, TD HENGEHOLD, RL YEO, YK GODBEY, DJ THOMPSON, PE POMRENKE, GS TI A STUDY OF BROAD-BAND PHOTOLUMINESCENCE FROM SI1-XGEX/SI SUPERLATTICES SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 7TH INTERNATIONAL CONF ON MOLECULAR BEAM EPITAXY ( MBE-7 ) CY AUG 24-28, 1992 CL SCHWABISCH, GERMANY SP DEUT FORSCHUNGSGEMEINSCH, MINIST WISSENSCH & KUNST BADEN WURTTEMBERG, MAX PLANCK GESELL, BAYER, DAIMLER BENZ, DEGUSSA, FISONS INSTRUMENTS, HEWLETT PACKARD, INSTRUMENTS SA, INTEVEC MBE EQUIPMENT ID ALLOYS AB Using photoluminescence (PL) obtained with ultraviolet (UV) laser excitation, we have examined Si1-xGex/Si long-period superlattices (SLs) grown by molecular beam epitaxy at 500-degrees-C and annealed post-growth at 550 to 750-degrees-C. Our as-grown samples show broad PL bands, 120 meV below the band gap when the effects of quantum confinement of holes are added in. The broad PL band peak positions shift to higher energies as the anneal temperature increases. This coincides with a reduction in the activation energies of the broad PL bands. The broad bands from both the as-grown and annealed samples shift to lower energies as the sample temperature increases. C1 USN,RES LAB,WASHINGTON,DC 20375. USAF,OFF SCI RES,WASHINGTON,DC 20330. RP STEINER, TD (reprint author), USAF,INST TECHNOL,WRIGHT PATTERSON AFB,OH 45433, USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD FEB PY 1993 VL 127 IS 1-4 BP 472 EP 475 DI 10.1016/0022-0248(93)90663-H PG 4 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA KZ453 UT WOS:A1993KZ45300100 ER PT J AU GOLDING, TD DURA, JA WANG, WC ZBOROWSKI, JT VIGLIANTE, A CHEN, HC MEYER, JR AF GOLDING, TD DURA, JA WANG, WC ZBOROWSKI, JT VIGLIANTE, A CHEN, HC MEYER, JR TI MOLECULAR-BEAM EPITAXIAL-GROWTH OF SB/GASB MULTILAYER STRUCTURES - POTENTIAL APPLICATION AS A NARROW BANDGAP SYSTEM SO JOURNAL OF CRYSTAL GROWTH LA English DT Article; Proceedings Paper CT 7TH INTERNATIONAL CONF ON MOLECULAR BEAM EPITAXY ( MBE-7 ) CY AUG 24-28, 1992 CL SCHWABISCH, GERMANY SP DEUT FORSCHUNGSGEMEINSCH, MINIST WISSENSCH & KUNST BADEN WURTTEMBERG, MAX PLANCK GESELL, BAYER, DAIMLER BENZ, DEGUSSA, FISONS INSTRUMENTS, HEWLETT PACKARD, INSTRUMENTS SA, INTEVEC MBE EQUIPMENT ID TRANSPORT-PROPERTIES AB We have performed an investigation into the synthesis of Sb/GaSb heterojunctions and multilayered structures grown by molecular beam epitaxy. The study has been motivated by the potential of the system as an indirect narrow-gap superlattice, where spacial quantization effects are proposed to induce a positive valence-conduction band energy gap in the Sb semimetal layers, and the potential to exploit the large characteristic lengths in the Sb layers for the study of size quantization effects. The GaSb/Sb system presents a number of unique features with regard to synthesis of the epitaxial semimetal/semiconductor system. On the (111) plane of the rhombohedral crystal structure of Sb, both the hexagonal symmetry and in-plane lattice parameter allow near perfect registry to the Sb atoms on the (111) plane of the zincblende structure of GaSb. We show that Sb can be grown epitaxially on GaSb on both (111)A and (111)B orientations for growth temperature T(s) < 240-degrees-C and that GaSb can subsequently be grown on the Sb epilayers. The successful growth of GaSb at temperatures less than 240-degrees-C has been achieved using migration enhanced epitaxy. Epilayer growth of Sb and Sb/GaSb heterojunction structures have been characterized by in situ reflection high energy electron diffraction, X-ray diffraction and X-ray photoelectron spectroscopy. C1 UNIV HOUSTON,CTR SPACE VACUUM EPITAXY,HOUSTON,TX 77204. USN,RES LAB,WASHINGTON,DC 20375. RP GOLDING, TD (reprint author), UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204, USA. RI Dura, Joseph/B-8452-2008 OI Dura, Joseph/0000-0001-6877-959X NR 13 TC 3 Z9 3 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD FEB PY 1993 VL 127 IS 1-4 BP 777 EP 782 DI 10.1016/0022-0248(93)90731-B PG 6 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA KZ453 UT WOS:A1993KZ45300168 ER PT J AU CLAWSON, AR JIANG, X YU, PKL HANSON, CM VU, TT AF CLAWSON, AR JIANG, X YU, PKL HANSON, CM VU, TT TI INTERFACE STRAIN IN ORGANOMETALLIC VAPOR-PHASE EPITAXY GROWN INGAAS/INP SUPERLATTICES SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article DE INP/INGAAS SUPERLATTICE; INTERFACIAL STRAIN; ORGANOMETALLIC VAPOR PHASE EPITAXY (OMVPE) ID GAINAS/INP; INP AB The spatial distribution of strain in organometallic vapor phase epitaxy grown InGaAs/InP superlattice structures has been studied by varying the thicknesses of the InGaAs well and the InP barrier layers and measuring the strain. High resolution x-ray diffraction rocking curves were used to measure the strain from angular separation between the zeroth-order superlattice peak and the substrate (004) peak. The results are consistent with a compressive strain resulting from arsenic carryover into the InP following InGaAs growth. The strain is not localized at the interfaces but extends into the InP barrier layer. The amount of arsenic carryover increases with the growth time of the InGaAs well. C1 USN,CTR COMMAND CONTROL OCEAN SURVEILLANCE,RDTE DIV,SAN DIEGO,CA 92152. RP CLAWSON, AR (reprint author), UNIV CALIF SAN DIEGO,DEPT ELECT & COMP ENGN,LA JOLLA,CA 92093, USA. NR 16 TC 5 Z9 5 U1 1 U2 2 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD FEB PY 1993 VL 22 IS 2 BP 155 EP 160 DI 10.1007/BF02665020 PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA KL348 UT WOS:A1993KL34800001 ER PT J AU PAPANICOLAOU, NA ANDERSON, GW ILIADIS, AA CHRISTOU, A AF PAPANICOLAOU, NA ANDERSON, GW ILIADIS, AA CHRISTOU, A TI LATTICE MISMATCHED INGAAS ON SILICON PHOTODETECTORS GROWN BY MOLECULAR-BEAM EPITAXY SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article DE INGAAS/SI; MOLECULAR BEAM EPITAXY; PHOTODETECTORS ID GAINAS AB In0.5Ga0.5As on silicon photodetectors, including three types of interdigitated-finger devices as well as linear photoconductors, were fabricated and measured. The InGaAs/Si structure was grown by molecular beam epitaxy and utilized a 100 angstrom GaAs intervening nucleation layer between the silicon substrate and the InGaAs layers, step-graded InxGa1-x As layers, and an in-situ grown 40 angstrom thick GaAs surface layer, which substantially enhanced the metal-semiconductor barrier height (PHI(b) = 0.67 V) for the InGaAs. Schottky diodes fabricated independently of the photodetectors had nearly ideal characteristics with an ideality factor (n) of 1.02 and a reverse breakdown voltage of 40 V. The interdigitated Schottky photodetectors showed dark currents between <3nA and 54 muA at a 3 V bias and initial photoresponse rise times in the range of 600 to 725 ps, comparable to similar InGaAs metal-semiconductor-metal photodetectors grown lattice matched on InP. The photoconductors fabricated in the same material had rise times in the range of 575 to 1300 ps, thus being slightly slower, and had dark currents of 7 to 80 mA. The responsivity of the photoconductors was typically greater than that of the diodes by a factor of five to fifteen. The results show potential for monolithic integration of InGaAs photodetectors on silicon substrates. C1 UNIV MARYLAND,DEPT ELECT ENGN,COLL PK,MD 20742. RP PAPANICOLAOU, NA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 19 TC 11 Z9 11 U1 0 U2 1 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD FEB PY 1993 VL 22 IS 2 BP 201 EP 206 DI 10.1007/BF02665027 PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA KL348 UT WOS:A1993KL34800008 ER PT J AU BASU, S BASU, S EASTES, R HUFFMAN, RE DANIELL, RE CHATURVEDI, PK VALLADARES, CE LIVINGSTON, RC AF BASU, S BASU, S EASTES, R HUFFMAN, RE DANIELL, RE CHATURVEDI, PK VALLADARES, CE LIVINGSTON, RC TI REMOTE-SENSING OF AURORAL E-REGION PLASMA STRUCTURES BY RADIO, RADAR, AND UV TECHNIQUES AT SOLAR MINIMUM SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID INCIDENT ELECTRON-SPECTRA; IONOSPHERIC IRREGULARITIES; OPTICAL MEASUREMENTS; EQUATORIAL ELECTROJET; DEDUCING COMPOSITION; VELOCITY SHEARS; POLAR-CAP; F-REGION; SCINTILLATION; DENSITY AB The unique capability of the Polar BEAR satellite to simultaneously image auroral luminosities at multiple ultraviolet (UV) wavelengths and to remote sense large-scale (hundreds to tens of kilometers) and small-scale (kilometers to hundreds of meters) plasma density structures with its multifrequency beacon package is utilized to probe the auroral E region in the vicinity of the incoherent scatter radar (ISR) facility near Sondrestrom. In particular, we present coordinated observations on two nights obtained during the sunspot minimum (sunspot number < 10) January-February 1987 period when good spatial and temporal conjunction was obtained between Polar BEAR overflights and Sondrestrom ISR measurements. With careful coordinated observations we were able to confirm that the energetic particle precipitation responsible for the UV emissions causes the electron density increases in the E region. These E region electron density enhancements were measured by the ISR at Sondrestrom. The integrations up to the topside of these ISR electron density profiles were consistent with the total electron content (TEC) measured by the Polar BEAR satellite. An election transport model was utilized to determine quantitatively the electron density profiles which could be produced by the particle precipitation, which also produced multiple UV emissions measured by the imager; these profiles were found to be in good agreement with the observed ISR profiles in the E region. Surprisingly large magnitudes of phase and amplitude scintillations were measured at 137 and 413 MHz in the regions of TEC enhancements associated with the particle precipitation. Steep phase spectral slopes with spectral index of 4 were found in these regions. Strength-of-turbulence computations utilizing the ISR electron density profiles and observed characteristics of phase and amplitude scintillations are interpreted in terms of an irregularity amplitude varying between 10 and 20% at a several-kilometer outer scale size in the E region extending approximately 50 km in altitude. This outer scale size is also consistent with the measured phase to amplitude scintillation ratio. An estimate of the linear growth rate of the gradient-drift instability in the E region shows that these plasma density irregularities could have been generated by this process. The mutual consistency of these different sets of measurements provides confidence in the ability of the different techniques to remote sense large- and small-scale plasma density structures in the E region at least during sunspot minimum when the convection-dominated high-latitude F region is fairly weak. C1 USAF,PHILLIPS LAB,GPIS,BEDFORD,MA 01731. COMPUTAT PHYS INC,NEWTON,MA 02159. BOSTON COLL,INST SPACE RES,NEWTON,MA 02159. USN,RES LAB,DIV PLASMA PHYS,SPACE PLASMA BRANCH,WASHINGTON,DC 20375. SRI INT,MENLO PK,CA 94025. NR 56 TC 13 Z9 13 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 JI J. Geophys. Res-Space Phys. PD FEB 1 PY 1993 VL 98 IS A2 BP 1589 EP 1602 DI 10.1029/92JA01655 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KK720 UT WOS:A1993KK72000033 ER PT J AU BERNHARDT, PA HUBA, JD PONGRATZ, MB SIMONS, DJ WOLCOTT, JH AF BERNHARDT, PA HUBA, JD PONGRATZ, MB SIMONS, DJ WOLCOTT, JH TI PLASMA IRREGULARITIES CAUSED BY CYCLOID BUNCHING OF THE CRRES G-2 BARIUM RELEASE SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID ION CLOUDS; CRIT-I; IONOSPHERE; FIELD; INSTABILITY; IONIZATION; STRIATIONS; STABILITY; SIMULATION; EVOLUTION AB The Combined Release and Radiation Effects Satellite (CRRES) spacecraft carried a number of barium thermite canisters for release into the upper atmosphere. The barium release labeled G-2 showed evidence of curved irregularities not aligned with the ambient magnetic field B. The newly discovered curved structures can be explained by a process called cycloid bunching. Cycloid bunching occurs when plasma is created by photoionization of a neutral cloud injected at high velocity perpendicular to B. If the injection velocity is much larger than the expansion speed of the cloud, the ion trail will form a cycloid that has irregularities spaced by the product of the perpendicular injection speed and the ion gyroperiod. Images of the solar-illuminated barium ions are compared with the results of a three-dimensional kinetic simulation. Cycloid bunching is shown to be responsible for the rapid generation of both curved and field-aligned irregularities in the CRRES G-2 experiment. C1 LOS ALAMOS NATL LAB,GRP SST-7,LOS ALAMOS,NM 87545. RP BERNHARDT, PA (reprint author), USN,RES LAB,DIV PLASMA PHYS,SPACE PLASMA BRANCH,CODE 6780,WASHINGTON,DC 20375, USA. NR 47 TC 11 Z9 14 U1 2 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD FEB 1 PY 1993 VL 98 IS A2 BP 1613 EP 1627 DI 10.1029/92JA00987 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KK720 UT WOS:A1993KK72000035 ER PT J AU KASHYAP, RL CHANG, LW AF KASHYAP, RL CHANG, LW TI STUDY OF INTERVAL BELIEF COMBINATION SO JOURNAL OF INTELLIGENT & ROBOTIC SYSTEMS LA English DT Article DE BELIEF COMBINATION; CONFLICTING EVIDENCE; DEPENDENT EVIDENCE; INTERVAL BELIEF AB In this paper, a new mathematical procedure is presented for combining different pieces of evidence which are represented in the interval form to reflect our knowledge about the truth of a hypothesis. Evidence may be correlated to each other (dependent evidence) or conflicting in support (conflicting evidence). First, assuming independent evidence, we propose a methodology to construct combination rules which obey a set of essential properties. The method is based on a geometric model. We compare results obtained from the Dempster-Shafer rule, interval Bayes rule, and the proposed combination rules with both conflicting and nonconflicting data and show that the values generated by the proposed combining rules are in tune with our intuition in both cases. Secondly, in the case that evidence is known to be dependent, we consider extensions of the rules derived for handling conflicting evidence. The performance of proposed rules are shown by different examples. The results show that the proposed rules reasonably make decisions under dependent evidence. C1 USN,RES LAB,WASHINGTON,DC 20375. RP KASHYAP, RL (reprint author), PURDUE UNIV,SCH ELECT ENGN,W LAFAYETTE,IN 47907, USA. NR 15 TC 0 Z9 0 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0921-0296 J9 J INTELL ROBOT SYST JI J. Intell. Robot. Syst. PD FEB PY 1993 VL 7 IS 1 BP 1 EP 13 DI 10.1007/BF01258209 PG 13 WC Computer Science, Artificial Intelligence; Robotics SC Computer Science; Robotics GA KJ271 UT WOS:A1993KJ27100001 ER PT J AU HACKERT, MJ BROWN, GD AF HACKERT, MJ BROWN, GD TI SYSTEM-DESIGN METHODOLOGY FOR POWER BUDGETING OF 62.5-MU-M MULTIMODE FIBER SYSTEMS SO JOURNAL OF LIGHTWAVE TECHNOLOGY LA English DT Article AB This paper presents the data to support a recommendation of a new system loss budgeting rule applicable to high-component-count systems using 62.5-mum core diameter multimode fiber. The limited phase space or restricted launch characterization of fiber again is demonstrated to give the most accurate system loss prediction. However, for this fiber size, components such as connectors, switches, and couplers are shown to exhibit loss equivalent to the overfilled launch loss. Two mechanisms are found to explain why the overfilled launch component loss best characterizes their actual loss in common multimode fiber systems. One is the large numerical aperture (NA) of the power distribution launched by the light-emitting diode (LED) system sources and the mode mixing by the components that excites higher numerical aperture to be carried by the fiber. The 62.5-mum fiber's loss is relatively insensitive to this larger power distribution, and thus carries it to the components without any significant additional loss. The second mechanism is the sensitivity of components' loss to higher numerical aperture. When this power distribution passed through the components, this high numerical aperture distribution caused higher loss than would have been expected from a restricted mode power distribution that had been measured. It is important to note that these mechanisms only have been observed on components made with 62.5-mum multimode fiber. Extrapolation to other fiber types should be avoided without a similar investigation since this behavior is likely to be different in other fiber sizes. C1 CORNING INC,PASS COMPONENTS DEV GRP,CORNING,NY 14831. USN,CTR SURFACE WARFARE,DAHLGREN,VA 22448. NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0733-8724 J9 J LIGHTWAVE TECHNOL JI J. Lightwave Technol. PD FEB PY 1993 VL 11 IS 2 BP 205 EP 211 DI 10.1109/50.212528 PG 7 WC Engineering, Electrical & Electronic; Optics; Telecommunications SC Engineering; Optics; Telecommunications GA LB518 UT WOS:A1993LB51800004 ER PT J AU SHAKER, AW AF SHAKER, AW TI ON SINGULAR SEMILINEAR ELLIPTIC-EQUATIONS SO JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS LA English DT Article ID DIFFERENTIAL-EQUATIONS; GEOMETRY RP SHAKER, AW (reprint author), USN,POSTGRAD SCH,DEPT MATH,MONTEREY,CA 93943, USA. NR 18 TC 31 Z9 34 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 0022-247X J9 J MATH ANAL APPL JI J. Math. Anal. Appl. PD FEB PY 1993 VL 173 IS 1 BP 222 EP 228 DI 10.1006/jmaa.1993.1062 PG 7 WC Mathematics, Applied; Mathematics SC Mathematics GA KR084 UT WOS:A1993KR08400015 ER PT J AU JEWELL, JM RULLER, JA AF JEWELL, JM RULLER, JA TI A STRUCTURAL MODEL FOR PBO-GA2O3-SIO2 GLASSES SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article ID BARIUM GALLOSILICATE GLASSES; LEAD SILICATE-GLASSES; PBO-SIO2; SYSTEM; RAMAN AB The effect of composition on the glass transformation temperature, viscosity, coefficient of thermal expansion, and density/molar volume of PbO-Ga2O3-SiO2 glasses was investigated. Trends in these data cannot be fully accounted for by previous structural explanations of the properties and glass-forming ability of the PbO-Ga2O3-based heavy metal oxide glasses. A new structural model is proposed which incorporates what is known about the structures of both PbO-SiO2 and PbO-Ga2O3 glasses to explain the anomalies in composition-property relationships demonstrated in this paper. In addition, this model is able to account for the discontinuities in the properties of PbO-Ga2O3 binary glasses which occur near the 75PbO-25Ga2O3 composition. RP JEWELL, JM (reprint author), USN,RES LAB,OPT MAT RES GRP,CODE 6505,WASHINGTON,DC 20375, USA. NR 28 TC 7 Z9 7 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD FEB PY 1993 VL 152 IS 2-3 BP 179 EP 187 DI 10.1016/0022-3093(93)90249-W PG 9 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA KN171 UT WOS:A1993KN17100012 ER PT J AU MEADOWS, CL GHER, ME QUINTERO, G LAFFERTY, TA AF MEADOWS, CL GHER, ME QUINTERO, G LAFFERTY, TA TI A COMPARISON OF POLYLACTIC ACID GRANULES AND DECALCIFIED FREEZE-DRIED BONE ALLOGRAFT IN HUMAN PERIODONTAL OSSEOUS DEFECTS SO JOURNAL OF PERIODONTOLOGY LA English DT Article DE GRAFTS; BONE REGENERATION; PERIODONTAL POCKETS SURGERY; SURGICAL FLAPS ID HISTOLOGIC EVALUATION; CLINICAL-EVALUATION; DISEASE; REPRODUCIBILITY; ATTACHMENT AB THE PURPOSE OF THIS STUDY was to compare the effectiveness of polylactic acid (PLA) granules as an alloplastic grafting material to that of decalcified freeze-dried bone allograft (DFDBA) and a flap procedure for debridement without graft (FPD) when treating periodontal intrabony defects. Ten patients presenting with advanced adult periodontitis, including at least 3 similar periodontal osseous defects (2- and 3-walled), comprised the study group. After completion of a hygienic phase of treatment, measurements were made with calibrated periodontal probes and stents to determine soft tissue recession, probing pocket depths, and probing attachment levels. Each defect was surgically exposed and hard tissue measurements were obtained. Defects were treated with one of the 3 methods above chosen randomly prior to the surgical appointment. Six months postsurgery, soft tissue measurements were repeated and all sites were surgically reentered to obtain hard tissue measurements. All surgical sites heated without clinical complication. The initial pocket depths and initial depth of osseous defects were compared between the groups using ANOVA and no significant differences were found. A mean osseous defect fill of 0.4 mm (11.2%) occurred with the flap procedure for debridement, 3.0 mm (65%) with DFDBA, and 0.1 mm (2.2%) with PLA. Mean crestal bone loss was 1.30 mm for FPD, 0.60 mm for DFDBA, and 1.55 mm for PLA. No statistically significant differences were found in soft tissue recession between groups or in the osseous defect measurement between PLA and FPD. A statistically significant improvement (P < 0.001) was found in the fill of the osseous defects when using DFDBA compared to the initial defect depth and to the other 2 groups. Probing depths decreased a mean of 3.4 mm with FPD, 4.15 mm with DFDBA, and 1.8 mm with PLA. DFDBA produced the greatest amount of osseous defect fill, FPD less fill, and PLA the least amount of fill. RP MEADOWS, CL (reprint author), USN,NATL DENT CTR,SCH DENT,DEPT PERIODONT,BETHESDA,MD 20814, USA. NR 26 TC 17 Z9 17 U1 0 U2 1 PU AMER ACAD PERIODONTOLOGY PI CHICAGO PA 737 NORTH MICHIGAN AVENUE, SUITE 800, CHICAGO, IL 60611-2690 USA SN 0022-3492 J9 J PERIODONTOL JI J. Periodont. PD FEB PY 1993 VL 64 IS 2 BP 103 EP 109 PG 7 WC Dentistry, Oral Surgery & Medicine SC Dentistry, Oral Surgery & Medicine GA KN151 UT WOS:A1993KN15100004 PM 8433249 ER PT J AU WEBB, AW SKELTON, EF QADRI, SB CARPENTER, ER AF WEBB, AW SKELTON, EF QADRI, SB CARPENTER, ER TI SYNTHESIS AND STUDY IN 23 METAL-LA-CU-O SYSTEMS SO JOURNAL OF SOLID STATE CHEMISTRY LA English DT Article ID DEFICIENT PEROVSKITE PHASE; COPPER OXIDES; IONIC-RADII; SUPERCONDUCTIVITY; PRESSURE; COMPOUND; SERIES RP USN, RES LAB, DIV CONDENSED MATTER & RADIAT SCI, WASHINGTON, DC 20375 USA. NR 60 TC 19 Z9 19 U1 1 U2 2 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0022-4596 EI 1095-726X J9 J SOLID STATE CHEM JI J. Solid State Chem. PD FEB PY 1993 VL 102 IS 2 BP 519 EP 533 DI 10.1006/jssc.1993.1063 PG 15 WC Chemistry, Inorganic & Nuclear; Chemistry, Physical SC Chemistry GA KQ305 UT WOS:A1993KQ30500027 ER PT J AU PERKINS, JS KUPERMAN, WA INGENITO, F FIALKOWSKI, LT GLATTETRE, J AF PERKINS, JS KUPERMAN, WA INGENITO, F FIALKOWSKI, LT GLATTETRE, J TI MODELING AMBIENT NOISE IN 3-DIMENSIONAL OCEAN ENVIRONMENTS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID WIND-GENERATED NOISE; SHALLOW-WATER; DIRECTIONALITY; FIELDS; LEVEL AB A model is developed for the calculation of the spatial properties of the surface-generated noise in a three-dimensional ocean. This is an extension of the work of Kuperman and Ingenito [J. Acoust. Soc. Am. 67, 1988-1996 (1980)], which used a normal-mode representation of the noise field in a stratified ocean. Noise fields are simulated for both point receivers and vertical line receivers. These examples show how the spatial and directional characteristics of the noise field are affected by the ocean environment. For example, as is apparent in ambient noise data, surface noise propagating at high angles over a sloping ocean bottom is deflected into shallower angles. Also, matched-field processing simulations in three-dimensional ocean environments can be done in a consistent manner: signals and surface-generated noise are modeled by propagating through the same environment with the same theory. C1 NORWEGIAN DEF RES ESTAB,HORTEN,NORWAY. RP PERKINS, JS (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 31 TC 26 Z9 29 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD FEB PY 1993 VL 93 IS 2 BP 739 EP 752 DI 10.1121/1.405437 PG 14 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KL820 UT WOS:A1993KL82000014 ER PT J AU LIU, JY SCHMIDT, H KUPERMAN, WA AF LIU, JY SCHMIDT, H KUPERMAN, WA TI EFFECT OF A ROUGH SEABED ON THE SPECTRAL COMPOSITION OF DEEP OCEAN INFRASONIC AMBIENT NOISE SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID SURFACE SCATTERING; SEAFLOOR AB In deep water, the vertical separation of surface noise sources from the elastic bottom is too large for direct excitation of the experimentally observed seismic interface waves in the frequency regime 1-10 Hz. It is here proposed that these strong seismic components are generated by scattering at rough elastic interfaces in the bottom, thereby coupling the noise field produced by the primary surface sources into evanescent waves in the bottom. This hypothesis is investigated by combining a previously developed perturbation theory of rough interface scattering with a model for surface generated noise in a stratified ocean environment. The resulting theory predicts a spectral composition of the noise field near the seabed that is consistent with the spectral structure of relevant seismic noise data recently collected in the Pacific. The present analysis, in combination with earlier analysis of a data set gathered in a shallow-water region, makes it quite clear that waveguide propagation mechanisms have an extreme coloring effect on the spectral shape of ocean ambient noise; hence, these mechanisms must be subtracted from measured noise data before inferring the spectral level of surface noise sources. C1 USN,RES LAB,WASHINGTON,DC 20375. RP LIU, JY (reprint author), MIT,CAMBRIDGE,MA 02139, USA. NR 23 TC 12 Z9 12 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD FEB PY 1993 VL 93 IS 2 BP 753 EP 769 DI 10.1121/1.405438 PG 17 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KL820 UT WOS:A1993KL82000015 ER PT J AU GROSH, K WILLIAMS, EG AF GROSH, K WILLIAMS, EG TI COMPLEX WAVE-NUMBER DECOMPOSITION OF STRUCTURAL VIBRATIONS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article ID MAXIMUM-LIKELIHOOD; ORDER AB A high-resolution parameter estimation technique is used to analyze the spatial dependence of the steady-state vibrations of finite structures. The complex wave-number dependence is extracted using a modified version of the Prony method along with model order overdetermination. This Prony technique forms the basis of an automated algorithm for the robust and efficient estimation of the structural system parameters. A specific algorithm is described and implemented using a wave viewpoint of the spatial response. The algorithm is used to deconvolve the helical wave spectrum of a point driven cylindrical shell from analytic response data. The effects of added noise are studied. C1 SFA INC,LANDOVER,MD 20785. USN,RES LAB,WASHINGTON,DC 20375. OI Grosh, Karl/0000-0001-8704-6199 NR 30 TC 27 Z9 27 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD FEB PY 1993 VL 93 IS 2 BP 836 EP 848 DI 10.1121/1.405445 PG 13 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KL820 UT WOS:A1993KL82000023 ER PT J AU BORGIOTTI, GV ROSEN, EM AF BORGIOTTI, GV ROSEN, EM TI THE STATE-VECTOR APPROACH TO THE WAVE ANALYSIS OF THE FORCED VIBRATION OF A CYLINDRICAL-SHELL .2. FINITE CYLINDERS IN VACUUM SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB The vibrational response of a circular cylindrical shell of a finite length in vacuum, excited by a point force of arbitrary orientation, is studied by using wave techniques and the state vector formalism. Because of the geometric symmetry, both the point excitation and the resulting vibrational response can be decomposed into Fourier circumferential components. The forced vibration is expressed as a linear superposition of ''waveguide modes'' with different circumferential numbers both propagating and attenuating. State vector techniques are used to identify the ''reflection matrices,'' characterizing, for each circumferential number, the linear relationship between the complex amplitudes of the waves ''ingoing'' to and ''outgoing'' from the end terminations. The discontinuity conditions at the point excitation provide the last set of equations needed for the complete identification of the vibrational response. A few particular cases, including a termination consisting of rigid disks having masses and moving as rigid bodies, are discussed in detail. Numerical results are presented. Because the approach is essentially analytical, the computational complexity is substantially reduced with respect to purely numerical methods, and largely independent of the cylinder length. C1 SFA INC,LANDOVER,MD. USN,RES LAB,WASHINGTON,DC 20375. RP BORGIOTTI, GV (reprint author), GEORGE WASHINGTON UNIV,DEPT ELECT & COMP ENGN,WASHINGTON,DC 20052, USA. NR 7 TC 2 Z9 2 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD FEB PY 1993 VL 93 IS 2 BP 864 EP 874 DI 10.1121/1.405448 PG 11 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA KL820 UT WOS:A1993KL82000026 ER PT J AU BACH, SBH PARENT, DC AF BACH, SBH PARENT, DC TI ION MOLECULE REACTIONS IN MIXTURES OF TRIMETHYLALUMINUM AND METHYLAMINES SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY LA English DT Article AB The ion-molecule reactions of mixtures of trimethylaluminum and methylamines, to serve as a model system for group 13-15 semiconductor fabrication, were examined by using Fourier transform ion cyclotron resonance mass spectrometry. Sequential ion-molecule reactions leading to formation of multiple adducts were observed for each of the reactant mixtures investigated. Collision-induced dissociation was used to probe the adduct structures. There is evidence for hydrogen bonding between the amines and aluminum in most of the adducts studied. Rearrangement of the aluminum/nitrogen skeletons was not observed, although the aluminum/nitrogen bonds appear to be relatively strong, so that stable adducts can be formed. The monomethylamine and dimethylamine readily produce gas-phase neutral adducts with trimethylaluminum, which can be related to the basicities of the methylamines. C1 USN,RES LAB,DIV CHEM,CODE 6110,WASHINGTON,DC 20375. RI Bach, Stephan/B-7496-2009 NR 18 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 1044-0305 J9 J AM SOC MASS SPECTR JI J. Am. Soc. Mass Spectrom. PD FEB PY 1993 VL 4 IS 2 BP 111 EP 116 DI 10.1016/1044-0305(93)85066-7 PG 6 WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA KM118 UT WOS:A1993KM11800004 PM 24234789 ER PT J AU MARCHYWKA, M PEHRSSON, PE BINARI, SC MOSES, D AF MARCHYWKA, M PEHRSSON, PE BINARI, SC MOSES, D TI ELECTROCHEMICAL PATTERNING OF AMORPHOUS-CARBON ON DIAMOND SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Letter AB The ability to pattern ion-implantation damaged or other nondiamond carbon on a diamond substrate is useful for fabricating a variety of devices. We accomplished such patterning by an unmasked implantation into a diamond substrate followed by photolithography and a selective electrochemical etch. The use of a high resistivity medium coupled with applied biases over 50 V permitted etching without requiring contact between the substrate and an electrode. Many electrolytes gave etches that exhibit high selectivity for nondiamond carbon over both diamond and dielectrics such as photoresist. Optical electrical, and Raman spectroscopic measurements elucidate the effects of the etch on the implanted diamond surface. C1 USN,RES LAB,DIV CHEM,WASHINGTON,DC 20375. USN,RES LAB,DIV ELECTR SCI & TECHNOL,WASHINGTON,DC 20375. RP MARCHYWKA, M (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 6 TC 29 Z9 29 U1 3 U2 7 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD FEB PY 1993 VL 140 IS 2 BP L19 EP L22 DI 10.1149/1.2221093 PG 4 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA KL863 UT WOS:A1993KL86300003 ER PT J AU YU, HY SANDAY, SC AF YU, HY SANDAY, SC TI ELASTIC FIELDS DUE TO CENTERS OF DILATATION AND THERMAL INHOMOGENEITIES IN PLANE-LAYERED SOLIDS SO JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS LA English DT Article AB AN IMAGE METHoD for obtaining the solution for a center of dilatation in a three-layer elastic solid with planar interfaces is presented. The three-layered elastic solid consists of an elastic slab sandwiched between two semi-infinite elastic solids. The three elastic solids are perfectly bonded together at the two planar interfaces. The solution is given in terms of Galerkin vectors which are in terms of an infinite series of the Newtonian potential function of a mass point at the center of dilatation, its mirror images and their derivatives. As an application, the solution for the center of dilatation is used to obtain the elastic solution due to thermal inhomogeneities. The thermoelastic solution is obtained by a method which is based on the integration of properly weighted centers of dilatation over the volume occupied by the inhomogeneity. The potential functions for the problem solved are the harmonic potential functions of attracting matter filling the volume of the thermal inhomogeneity and its mirror images. The solution for the thermal elastic stresses due to an expanding (or contracting) thermal inhomogeneity (inclusion) of any shape embedded in one of the solids is given as an example. Numerical results for a spherical inclusion with pure dilatation eigenstrain are also presented and discussed. RP YU, HY (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 17 TC 12 Z9 12 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-5096 J9 J MECH PHYS SOLIDS JI J. Mech. Phys. Solids PD FEB PY 1993 VL 41 IS 2 BP 267 EP 296 DI 10.1016/0022-5096(93)90009-5 PG 30 WC Materials Science, Multidisciplinary; Mechanics; Physics, Condensed Matter SC Materials Science; Mechanics; Physics GA KK034 UT WOS:A1993KK03400003 ER PT J AU STENGERSMITH, JD AF STENGERSMITH, JD TI REEVALUATION OF THE ULTRAVIOLET VISIBLE SPECTRUM OF THE 4-(DIALKYLAMINO)-ALPHA-CYANOCINNAMIC ACID ESTER-TYPE CHROMOPHORE SO MAKROMOLEKULARE CHEMIE-RAPID COMMUNICATIONS LA English DT Article ID NONLINEAR OPTICAL POLYMER; MAIN-CHAIN RP STENGERSMITH, JD (reprint author), USN,CTR AIR WARFARE,DIV WEAP,RES DEPT,DIV CHEM,CHINA LAKE,CA 93555, USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU HUTHIG & WEPF VERLAG PI BASEL PA AUF DEM WOLF 4 FX#001-41-61-317-94-11, CH-4052 BASEL, SWITZERLAND SN 0173-2803 J9 MAKROMOL CHEM-RAPID PD FEB PY 1993 VL 14 IS 2 BP 67 EP 68 PG 2 WC Polymer Science SC Polymer Science GA KM060 UT WOS:A1993KM06000002 ER PT J AU AARONSON, HI AF AARONSON, HI TI ATOMIC MECHANISMS OF DIFFUSIONAL NUCLEATION AND GROWTH AND COMPARISONS WITH THEIR COUNTERPARTS IN SHEAR TRANSFORMATIONS SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Review ID FE-C ALLOYS; GRAIN-BOUNDARY ALLOTRIOMORPHS; LEDGED INTERPHASE BOUNDARIES; PRECIPITATE PLATE GROWTH; CRITICAL NUCLEUS SHAPES; FCC-FCC NUCLEATION; BETA-1-GAMMA-1' MARTENSITIC INTERFACE; TRANSMISSION ELECTRON-MICROSCOPY; 3-DIMENSIONAL ISING-MODEL; ELASTIC STRAIN-ENERGY AB An integrated overview is presented of a viewpoint on the present understanding of nucleation and growth mechanisms in both diffusional and shear (martensitic) transformations. Special emphasis is placed on the roles played by the anisotropy of interphase boundary structure and energy and also upon elastic shear strain energy in both types of transformation. Even though diffusional nucleation is based on random statistical fluctuations, use of the time reversal principle shows that interfacial energy anisotropy leads to accurately reproducible orientation relationships and hence to partially or fully coherent boundaries, even when nucleation at a grain boundary requires an irrational orientation relationship to obtain. Since the fully coherent boundary areas separating most linear misfit compensating defects are wholly immobile during diffusional growth because of the improbability of moving substitutional atoms even temporarily into interstitial sites under conditions normally encountered, partially and fully coherent interphase boundaries should be immovable without the intervention of growth ledges. These ledges, however, must be heavily kinked and usually irregular in both spacing and path if they, too, are not to be similarly trapped. On the other hand, the large shear strain energy usually associated with martensite requires that its formation be initiated through a process which avoids the activation barrier associated with nucleation, perhaps by the Olson-Cohen matrix dislocation rearrangement mechanism. During growth, certain ledges on martensite plates serve as transformation dislocations and perform the crystal structure change (Bain strain). However, the terraces between these ledges in martensite (unlike those present during diffusional growth) are also mobile during non-fcc/hcp transformations; glissile dislocations on these terraces perform the lattice invariant deformation. Growth ledges operative during both diffusional and shear growth probably migrate by means of kink mechanisms. However, diffusional kinks appear to be nonconservative and sessile (and therefore resist immediate transmission of elastic shear strain energy), whereas those associated with martensitic growth must be conservative and glissile (and fully transmit such strain energy). The broad faces of both diffusionally and martensitically formed plates contain an invariant line, as emphasized by Dahmen and Weatherly. However, in the diffusional case, minimization of growth ledge formation kinetics seems to be the main role thereby played, whereas in martensitic growth, the main purpose of such an interface is to minimize elastic shear strain energy. The latter minimization requires that martensite forms as plates (or perhaps as laths) enclosed by a pair of invariant line-containing interfaces. During diffusional transformations, on the other hand, other interfaces at which growth ledge formation kinetics are not too much faster than those at the invariant line interface can also comprise a significant portion of the interfacial area, thereby leading to the formation of other, quite different morphologies, such as intragranular idiomorphs and grain boundary allotriomorphs. Critical problems remaining unsolved in diffusional transformations include calculation of critical nucleus shapes when the crystal structures of the two phases are significantly different, highly accurate calculation of the energies of the interphase boundaries thus formed, and direct observation of atomic scale kinks on the risers of growth ledges by means of a yet-to-be-invented three-dimensional (3-D) atomic-resolution form of transmission electron microscopy. Experimental identification and characterization of transformation dislocations and experimental testing of ''nucleation'' mechanisms are now of special importance in fundamental studies of martensitic transformations. RP AARONSON, HI (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 252 TC 78 Z9 78 U1 4 U2 25 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD FEB PY 1993 VL 24 IS 2 BP 241 EP 276 DI 10.1007/BF02657313 PG 36 WC Materials Science, Multidisciplinary SC Materials Science GA KK981 UT WOS:A1993KK98100001 ER PT J AU GREEN, JB AF GREEN, JB TI LAPAROSCOPIC SURGERY IN THE MILITARY SO MILITARY MEDICINE LA English DT Letter RP GREEN, JB (reprint author), USN HOSP,DEPT SURG,SAN DIEGO,CA 92134, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASSN MILITARY SURG US PI BETHESDA PA 9320 OLD GEORGETOWN RD, BETHESDA, MD 20814 SN 0026-4075 J9 MIL MED JI Milit. Med. PD FEB PY 1993 VL 158 IS 2 BP A3 EP A3 PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA KM459 UT WOS:A1993KM45900001 PM 8441485 ER PT J AU GELARO, R ERRICO, RM AF GELARO, R ERRICO, RM TI THE FORCING AND BALANCE OF ZONALLY SYMMETRICAL MODES IN A GLOBAL-MODEL SO MONTHLY WEATHER REVIEW LA English DT Article ID NUMERICAL WEATHER PREDICTION; GENERAL-CIRCULATION MODEL; LARGE-SCALE ENVIRONMENT; CUMULUS CLOUD ENSEMBLE; INITIALIZATION AB The temporal behavior of the zonal wavenumber 0 Hadley modes in the U.S. Navy's operational numerical weather prediction model is investigated. Time series of individual gravitational normal modes are examined in forecasts using different initialization strategies to determine the existence and nature of any nonlinear balance and the impact of initial conditions. A form of diabatic initialization based on a least-squares fit to the modes' trajectories in the forecast model is developed. A straightforward interpretation of the results, particularly how they relate to the principles of nonlinear normal-mode initialization, is afforded via a simple prognostic equation for a single gravitational mode. A limited number of behavior types is observed, which varies depending on the temporal and meridional scales of the modes. Only the largest-scale zonally symmetric modes show any evidence of diabatic balance and may thus be suitable candidates for diabatic initialization. Convective heating is the primary stationary forcing for these modes. Most medium-scale modes, whose natural periods may be close to the diurnal period, behave in a forced, wavelike manner due, apparently, to near-resonant diurnal forcing. Those modes with the smallest temporal and meridional scales exhibit both balanced and forced behavior. The dominant forcing for these modes appears to be adiabatic. C1 NATL CTR ATMOSPHER RES,BOULDER,CO 80307. RP GELARO, R (reprint author), USN,RES LAB,MONTEREY,CA 93943, USA. NR 29 TC 3 Z9 3 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0027-0644 J9 MON WEATHER REV JI Mon. Weather Rev. PD FEB PY 1993 VL 121 IS 2 BP 470 EP 481 DI 10.1175/1520-0493(1993)121<0470:TFABOZ>2.0.CO;2 PG 12 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KN838 UT WOS:A1993KN83800012 ER PT J AU ERRICO, RM ROSMOND, TE GOERSS, JS AF ERRICO, RM ROSMOND, TE GOERSS, JS TI A COMPARISON OF ANALYSIS AND INITIALIZATION INCREMENTS IN AN OPERATIONAL DATA-ASSIMILATION SYSTEM SO MONTHLY WEATHER REVIEW LA English DT Article ID NORMAL MODE INITIALIZATION; NUMERICAL WEATHER PREDICTION; SPECTRAL MODEL; CIRCULATION; DIVERGENCE AB We have compared analysis increments produced by the optimal interpolation scheme and initialization increments produced by the nonlinear normal-mode initialization scheme in the U.S. Navy Operational Global Atmospheric Prediction System. Results indicate that analysis increments of height in the tropics are partially removed by the subsequent initialization. Similar results are obtained for the field of horizontal velocity divergence within the extratropics as well as tropics. Consequently, for some fields in some areas, the initialized analyses are primarily defined by the model-produced background field, irrespective of the availability of observations or model error estimates. C1 USN,RES LAB,MONTEREY,CA 93940. RP ERRICO, RM (reprint author), NATL CTR ATMOSPHER RES,POB 3000,BOULDER,CO 80307, USA. NR 29 TC 5 Z9 5 U1 0 U2 0 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0027-0644 J9 MON WEATHER REV JI Mon. Weather Rev. PD FEB PY 1993 VL 121 IS 2 BP 579 EP 588 DI 10.1175/1520-0493(1993)121<0579:ACOAAI>2.0.CO;2 PG 10 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KN838 UT WOS:A1993KN83800019 ER PT J AU BROWN, GG VASSILIOU, AL AF BROWN, GG VASSILIOU, AL TI OPTIMIZING DISASTER RELIEF - REAL-TIME OPERATIONAL AND TACTICAL DECISION SUPPORT SO NAVAL RESEARCH LOGISTICS LA English DT Article AB We introduce a real-time decision support system which uses optimization methods, simulation, and the judgement of the decision maker for operational assignment of units to tasks and for tactical allocation of units to task requirements. rhe system, named ARES for the Greek god of war. accommodates a high degree of detail in the logistics of unit movements during operations, yet separates the assignment and allocation activities in a fashion which naturally accommodates human intervention and judgement-ARES is designed to assist the decision maker, not to replace him. ARES is demonstrated with a hypothetical scenario constructed for 14 Engineering Battalions of the Hellenic Army which are assigned 20 tasks employing 25 resource types in repairing major damage to public works following a great earthquake. (This hypothetical data was prepared prior to the earthquake in Kalamata near Athens on 13 September, 1986, and exhibits uncanny hut coincidental, resemblance to that real situation.) ARES is designed for use in real time, and quick data preparation is aided by the provision from published sources of standard data for many foreseeable tasks; this data can be quickly accessed via visual icons on a computer screen and customized for the actual work at hand. C1 HELLEN ARMY HEADQUARTERS,ATHENS,GREECE. RP BROWN, GG (reprint author), USN,POSTGRAD SCH,MONTEREY,CA 93943, USA. NR 21 TC 35 Z9 40 U1 2 U2 11 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0894-069X J9 NAV RES LOG JI Nav. Res. Logist. PD FEB PY 1993 VL 40 IS 1 BP 1 EP 23 DI 10.1002/1520-6750(199302)40:1<1::AID-NAV3220400102>3.0.CO;2-S PG 23 WC Operations Research & Management Science SC Operations Research & Management Science GA KK307 UT WOS:A1993KK30700001 ER PT J AU CHANTLER, CT LAMING, JM SILVER, JD AF CHANTLER, CT LAMING, JM SILVER, JD TI BEAM GAS RECOIL SPECTRA OF HIGHLY IONIZED NEON SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article ID LAMB SHIFT; ATOMS AB Observations of neon gas recoil spectra from bromine ion bombardment at 81-83 Mev energies are reported. Hydrogenic and helium-like ions were observed with a resolving power of 225. This is improved over previous work with the exception of narrow-range high-precision results of Laming et al. (Phys. Lett. A123 (1987) 395; Phys. Lett. A126(1988) 253). Current data complementary to these narrow-range results provide wavelengths which show improved agreement with theory compared to earlier work. C1 USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 4174L,WASHINGTON,DC 20375. UNIV OXFORD,DEPT PHYS,CLARENDON LAB,OXFORD OX1 3PU,ENGLAND. SFA INC,LANDOVER,MD 20785. RP CHANTLER, CT (reprint author), NATL INST STAND & TECHNOL,DIV QUANTUM METROL,GAITHERSBURG,MD 20899, USA. RI Chantler, Christopher/D-4744-2013 OI Chantler, Christopher/0000-0001-6608-0048 NR 23 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD FEB PY 1993 VL 73 IS 2 BP 130 EP 134 DI 10.1016/0168-583X(93)95726-L PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA KL011 UT WOS:A1993KL01100004 ER PT J AU DOYLE, RJ AF DOYLE, RJ TI SPUTTERED AMMONIUM DINITRAMIDE - TANDEM MASS-SPECTROMETRY OF A NEW IONIC NITRAMINE SO ORGANIC MASS SPECTROMETRY LA English DT Article ID FAST ATOM BOMBARDMENT; GAS-PHASE; CLUSTER IONS; DISSOCIATION; HEXAHYDRO-1,3,5-TRINITRO-1,3,5-TRIAZINE; FAB; FD AB The recently synthesized ammonium dinitramide (ADN) is an ionic compound containing the ammonium ion and a new oxide of nitrogen, the dinitramide anion (O2N-N-NO2-). ADN has been investigated using high-energy xenon atoms to sputter ions directly from the surface of the neat crystalline solid. Tandem mass spectrometric techniques were used to study dissociation pathways and products of the sputtered ions. Among the sputtered ionic products were NH4+, NO+, NO2+, NO2-, N2O2-., N3O4- and an unexpected high abundance of NO3-. Tandem mass spectra of the dinitramide anion reveal the uncommon situation where a product ion (NO3-) is formed in high relative abundance from metastable parent ions but is formed in very low relative abundance from collisionally activated parent ions. It is proposed that the nitrate anion is formed in the gas phase by a rate-determining isomerization of the dinitramide anion that proceeds through a four-centered transition state. The formation of the strong gas-phase acid, dinitraminic acid (HN3O4), the conjugate acid of the dinitramide anion, was observed to occur by dissociation of protonated ADN and by dissociation of ADN aggregate ions with the general formula [NH4(N(NO2)2)]nNH4+, where n = 1-30. RP DOYLE, RJ (reprint author), USN,RES LAB,DIV CHEM,CODE 6110D,WASHINGTON,DC 20375, USA. NR 34 TC 18 Z9 19 U1 0 U2 2 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0030-493X J9 ORG MASS SPECTROM JI Org. Mass Spectrom. PD FEB PY 1993 VL 28 IS 2 BP 83 EP 91 DI 10.1002/oms.1210280205 PG 9 WC Chemistry, Organic; Spectroscopy SC Chemistry; Spectroscopy GA KP775 UT WOS:A1993KP77500004 ER PT J AU GADRE, AK FAYAD, JN OLEARY, MJ ZAKHARY, R LINTHICUM, FH AF GADRE, AK FAYAD, JN OLEARY, MJ ZAKHARY, R LINTHICUM, FH TI ARTERIAL SUPPLY OF THE HUMAN ENDOLYMPHATIC DUCT AND SAC SO OTOLARYNGOLOGY-HEAD AND NECK SURGERY LA English DT Article ID VESTIBULAR AQUEDUCT; MONGOLIAN GERBIL; BLOOD-VESSELS; INNER-EAR; GROSS AB The arterial anatomy of the endolymphatic duct and sac was studied in vascular casts of methyl methacrylate of six human heads. The chief source of arterial blood supply to the endolymphatic duct and sac appeared to be the occipital artery. Arterioles entered the bone of the mastoid process. Arterioles in bone, the walls of the sigmoid sinus, and the posterior fossa dura coursed medially to supply the endolymphatic sac. The orientation of arterioles tended to be along the long axis of the endolymphatic duct and sac, whereas venules were more likely to be circumferentially oriented. Arterioles arising from dural vessels divided into deeper branches, which supplied periductal connective tissue, and superficial branches, which entered canaliculi of the vestibular aqueduct. Gross anatomic findings were confirmed by histologic examination of temporal bones. C1 UNIV SO CALIF,SCH MED,INST HOUSE EAR,LOS ANGELES,CA 90033. UCD DAVIS,MED CTR,DEPT OTOLARYNGOL HEAD & NECK SURG,DAVIS,CA. COLUMBIA UNIV,SCH MED,NEW YORK,NY 10027. USN HOSP,SAN DIEGO,CA 92134. USC LOS ANGELES,SCH DENT,DEPT ANAT,LOS ANGELES,CA. USC LOS ANGELES,SCH MED,DEPT OTOLARYNGOL,LOS ANGELES,CA. NR 32 TC 17 Z9 19 U1 0 U2 1 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0194-5998 J9 OTOLARYNG HEAD NECK JI Otolaryngol. Head Neck Surg. PD FEB PY 1993 VL 108 IS 2 BP 141 EP 148 PG 8 WC Otorhinolaryngology; Surgery SC Otorhinolaryngology; Surgery GA KP630 UT WOS:A1993KP63000006 PM 8441538 ER PT J AU COLETTA, PE AF COLETTA, PE TI LAUNCHING THE DOOLITTLE RAID ON JAPAN, APRIL 18, 1942 SO PACIFIC HISTORICAL REVIEW LA English DT Note RP COLETTA, PE (reprint author), USN ACAD,ANNAPOLIS,MD 21402, USA. NR 9 TC 3 Z9 3 U1 0 U2 0 PU UNIV CALIF PRESS PI BERKELEY PA JOURNALS DEPT 2120 BERKELEY WAY, BERKELEY, CA 94720 SN 0030-8684 J9 PAC HIST REV JI Pac. Hist. Rev. PD FEB PY 1993 VL 62 IS 1 BP 73 EP 86 PG 14 WC History SC History GA KR601 UT WOS:A1993KR60100004 ER PT J AU AHLERS, ST SALANDER, MK AF AHLERS, ST SALANDER, MK TI EFFECTS OF REPEATED ADMINISTRATION OF CORTICOTROPIN-RELEASING FACTOR ON SCHEDULE-CONTROLLED BEHAVIOR IN RATS SO PHARMACOLOGY BIOCHEMISTRY AND BEHAVIOR LA English DT Article DE CORTICOTROPIN-RELEASING FACTOR; STRESS; SCHEDULE-CONTROLLED BEHAVIOR; ADAPTATION; TOLERANCE; CHRONIC ID NERVOUS-SYSTEM; STRESS; CRF; ACTIVATION AB To examine the effects of repeated administration of corticotropin-releasing factor (CRF) on behavior, rats were administered ICV injections of CRF or saline on alternate days for 10 days prior to performing on a multiple fixed-interval (FI) 60 s/fixed-ratio (FR) 20 schedule for food reinforcement. A daily session consisted of 10 components of each schedule that alternated, starting with the FI component. CRF doses were individually determined for each rat and were either 1.0, 3.0, or 10 mug CRF based upon the dose that occasioned more than a 50% reduction in the rate of responding. Acute administration of CRF decreased the rate of responding in both components well below control rates; this decrease in responding was associated with a 20 or 50% decrease in the number of earned reinforcements in the FI and FR components, respectively. With repeated administration, CRF-induced suppression of responding was attenuated, although CRF continued to decrease response rate. Despite the continued reduction in response rate, subsequent CRF injections did not result in a loss of reinforcements in the FI component, whereas rats continued to lose 20% of the reinforcers in the FR component. After an 18-day hiatus in which no CRF was administered, the baseline rate of responding on the multiple schedule increased, in particular in the FI component. When CRF was readministered, response rates were slightly suppressed relative to a reestablished saline control but significantly higher than CRF-induced suppression on the last day of the chronic regimen. These data demonstrate that with repeated administration tolerance develops to CRF-induced suppression of responding in rats. RP AHLERS, ST (reprint author), USN,MED RES INST,DIV NEUROCHEM,THERMAL STRESS ADAPTAT PROGRAM,BETHESDA,MD 20889, USA. NR 28 TC 9 Z9 9 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0091-3057 J9 PHARMACOL BIOCHEM BE JI Pharmacol. Biochem. Behav. PD FEB PY 1993 VL 44 IS 2 BP 375 EP 380 DI 10.1016/0091-3057(93)90477-B PG 6 WC Behavioral Sciences; Neurosciences; Pharmacology & Pharmacy SC Behavioral Sciences; Neurosciences & Neurology; Pharmacology & Pharmacy GA KM966 UT WOS:A1993KM96600020 PM 8446669 ER PT J AU KRIVEC, R HAFTEL, MI MANDELZWEIG, VB AF KRIVEC, R HAFTEL, MI MANDELZWEIG, VB TI PRECISE NONVARIATIONAL CALCULATION OF THE 2-PHOTON ANNIHILATION RATE OF THE POSITRONIUM NEGATIVE-ION SO PHYSICAL REVIEW A LA English DT Article ID HYPERSPHERICAL-HARMONIC METHOD; HELIUM ISOELECTRONIC SEQUENCE; VARIATIONAL CALCULATIONS; STATES; EXPANSION AB A direct (nonvariational) solution of the Schrodinger equation for the ground state of the positronium negative ion is obtained with the correlation-function hyperspherical-harmonic (CFHH) method. Given the proper correlation function chosen from physical considerations, the CFHH method generates wave functions accurate in the whole range of interparticle distances that lead, in turn, to precise estimates of the expectation values of the Hamiltonian and of different functions of interparticle distances. The correlation function used was chosen to have proper electron-positron and electron-electron cusps as well as asymptotic behavior. The inclusion of 225 hyperspherical functions yields the nonextrapolated ground-state energy value of 0.262 005 058 atomic units, which is lower than the nonextrapolated energy values 0.262 004 895 and 0.262 005 056 calculated in works of Ho [J. Phys. B 16, 1503 (1983)] and Bhatia and Drachman [Phys. Rev. A 28, 2523 (1983)] but higher than the best variational value 0.262 005 069 obtained by Petenlenz and Smith [Phys. Rev. A 36, 5125 (1987)]. The accuracy of our value of 2.086 10+/-0.000 06 nsec-1 for the two-photon annihilation rate is higher by an order of magnitude than obtained in the previous literature. C1 J STEFAN INST, LJUBLJANA 61111, SLOVENIA. MAX PLANCK INST NUCL PHYS, W-6900 HEIDELBERG 1, GERMANY. USN, RES LAB, WASHINGTON, DC 20375 USA. RP KRIVEC, R (reprint author), HEBREW UNIV JERUSALEM, DEPT PHYS, IL-91904 JERUSALEM, ISRAEL. NR 35 TC 38 Z9 38 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 FEB PY 1993 VL 47 IS 2 BP 911 EP 917 DI 10.1103/PhysRevA.47.911 PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA KV979 UT WOS:A1993KV97900029 ER PT J AU MEHL, MJ AF MEHL, MJ TI PRESSURE-DEPENDENCE OF THE ELASTIC-MODULI IN ALUMINUM-RICH AL-LI COMPOUNDS SO PHYSICAL REVIEW B LA English DT Article ID STRUCTURAL-PROPERTIES; INTERMETALLIC COMPOUNDS; PHASE; CONSTANTS; ALLOYS; ENERGY; AL3LI AB I have carried out numerical first-principles calculations of the pressure dependence of the elastic moduli for several ordered structures in the aluminum-lithium system, specifically fcc Al, fcc and bcc Li, L1(2) Al3Li, and an ordered fcc Al7Li supercell. The calculations were performed using the full-potential linear augmented plane-wave method (LAPW) to calculate the total energy as a function of strain, after which the data were fit to a polynomial function of the strain to determine the modulus. A procedure for estimating the errors in this process is also given. The predicted equilibrium lattice parameters are slightly smaller than found experimentally, consistent with other local-density-approximation (LDA) calculations. The computed elastic moduli are within approximately 10% of the experimentally measured moduli, provided the calculations are carried out at the experimental lattice constant. The LDA equilibrium shear modulus C-11-C-12 increases from 59.3 GPa in Al, to 76.0 GPa in Al7Li, to 106.2 GPa in Al3Li. The modulus C44 increases from 38.4 GPa in Al to 46.1 GPa in Al7Li, then falls to 40.7 GPa in Al3Li. All of the calculated elastic moduli increase with pressure with the exception of bcc Li, which becomes elastically unstable at about 2 GPa, where C-11-C-12 vanishes. C1 USN, RES LAB, COMPLEX SYST THEORY BRANCH, WASHINGTON, DC 20375 USA. RP PHB ECUBLENS, INST ROMAND RECH NUMER PHYS MAT, CH-1015 LAUSANNE, SWITZERLAND. RI Mehl, Michael/H-8814-2016 NR 38 TC 253 Z9 255 U1 3 U2 24 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 FEB 1 PY 1993 VL 47 IS 5 BP 2493 EP 2500 DI 10.1103/PhysRevB.47.2493 PG 8 WC Physics, Condensed Matter SC Physics GA KL789 UT WOS:A1993KL78900009 ER PT J AU ERICKSON, RP HATHAWAY, KB CULLEN, JR AF ERICKSON, RP HATHAWAY, KB CULLEN, JR TI MECHANISM FOR NON-HEISENBERG-EXCHANGE COUPLING BETWEEN FERROMAGNETIC LAYERS SO PHYSICAL REVIEW B LA English DT Article ID FE LAYERS; MAGNETIC MULTILAYERS; CR; SUPERLATTICES; TRILAYERS AB We consider a free-electron model of exchange coupling between transition-metal ferromagnetic films separated by a paramagnetic metal spacer. The minority-spin energy bands in the ferromagnets are matched to those of the paramagnetic spacer. The majority-spin electrons experience a repulsive potential arising from the lack of corresponding states in the spacer. The height of the potential barrier is equal to the exchange-energy gap in the ferromagnets. We show how the model, applicable to a trilayer film such as Fe/Cr/Fe or Co/Ru/Co, generates an infinite sum of terms with coefficients A12,B-12,... in the coupling energy, extending beyond the Heisenberg-like A12 term of bilinear coupling between the moments of the ferromagnets. Both the A12 and non-Heisenberg (biquadratic) B-12 exchange terms oscillate with spacer-layer thickness. We find that the phase of B-12 relative to A12 shifts with this thickness, so that at certain regions of spacer-layer thickness, the magnitude of B-12 is greater than that of A12, and B-12 is of the proper sip to cause 90-degrees coupling between the ferromagnets. These special thicknesses are predicted to appear over a broad range of the ratio of Fermi to exchange-gap energies. Thus, we show from our model that biquadratic, or 90-degrees, coupling between the ferromagnets is intrinsic to itinerant-electron exchange across the paramagnetic sparer. C1 USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903. RP ERICKSON, RP (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 25 TC 114 Z9 115 U1 1 U2 7 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 FEB 1 PY 1993 VL 47 IS 5 BP 2626 EP 2635 DI 10.1103/PhysRevB.47.2626 PG 10 WC Physics, Condensed Matter SC Physics GA KL789 UT WOS:A1993KL78900027 ER PT J AU RAJAGOPAL, AK JHA, SS AF RAJAGOPAL, AK JHA, SS TI STRUCTURE OF INTRALAYER AND INTERLAYER PAIRING INTERACTIONS, THE ANISOTROPY OF ORDER PARAMETERS, AND THE TRANSITION-TEMPERATURE IN LAYERED SUPERCONDUCTORS SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TC SUPERCONDUCTORS; COPPER-OXIDE SUPERCONDUCTORS; CONDUCTING LAYERS; UNIT-CELL; MODEL; SUPERLATTICES; DEPENDENCE; SYSTEMS; NUMBER; GAP AB The structure of the general effective pairing interaction V(r1,r2;omega) for spin-singlet superconductivity in layered systems is examined in detail in a layer representation for the single-particle states. This interaction, averaged over the layer-plane momentum transfers near the Fermi surface [i.e., (pp)VBAR(q,q',omega)], is expressed in terms of intracell-intralayer, intracell-interlayer, intercell-intralayer, and intercell-interlayer couplings, where q,q' are wave vectors in the direction of the normal to the layers. In our general picture, because of the interaction process, a localized particle can scatter across from one layer to another in the same unit cell, as well as from one vertical unit cell to another cell. The dominant coupling terms are due to the interaction of two particles localized on layers within the same vertical unit cell, both before and after the scattering. The intercell coupling terms correspond to scattering process in which at least one of the particles is localized in a different vertical unit cell either before or after the scattering. Whereas the ratio delta(c) between the intracell and nearest-neighbor intercell couplings is assumed to be small compared with unity in our analysis, no perturbative approach is used to distinguish the magnitudes of interlayer couplings from the corresponding intralayer couplings. General results for T(c) and the superconducting-order-parameter matrix DELTA, are discussed for the case of N layers per unit cell, both in the limit in which the off-diagonal tunneling terms, t(q), appearing in the inverse of the normal-state single-particle N X N Green-function matrix, g-1, in the layer representation, are either neglected or included to the lowest order in \t(q)\/mu. Here, mu is the chemical potential. We find that the q,q' dependence of (pp)V arises only from intercell couplings which in turn implies that the q dependence and anisotropy in DELTA are entirely due to intercell interactions. Explicit results are given for T(c) as well as the order parameters for the case of N = 1 and 2, to leading orders in delta(c) and \t(q)\/mu. We find that anisotropy in the gap parameter in the layer representation always arises due to the intercell interactions, and is present even in the N = 1 case. It is also found that the presence of interlayer couplings tends to enhance T(c) in general. In a representation in which g-1 is diagonal, called the alpha-band representation here, we reformulate the problem in terms of new order parameters, DELTA(alpha) and new effective interaction, (pp)V(alpha)(qq';omega). Although, in this representation there appear additional q,q' dependences in (pp)V(alpha), these do not imply extra anisotropy in the corresponding gap parameter DELTA in the layer representation. This is only an artifact of the use of the alpha representation as revealed by the relation between DELTA(alpha) and DELTA. For interband pairing in the alpha representation, we also present a complete calculation for the resulting order parameter. C1 USN,RES LAB,WASHINGTON,DC 20375. RP RAJAGOPAL, AK (reprint author), TATA INST FUNDAMENTAL RES,HOMI BHABHA RD,BOMBAY 400005,INDIA. NR 29 TC 10 Z9 10 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 FEB 1 PY 1993 VL 47 IS 5 BP 2780 EP 2794 DI 10.1103/PhysRevB.47.2780 PG 15 WC Physics, Condensed Matter SC Physics GA KL789 UT WOS:A1993KL78900045 ER PT J AU CARROLL, TL PECORA, LM AF CARROLL, TL PECORA, LM TI STOCHASTIC RESONANCE AND CRISES SO PHYSICAL REVIEW LETTERS LA English DT Article ID EXPONENTS; CHAOS AB Stochastic resonance is a phenomenon seen in multistable systems where the addition of noise to the system can amplify small periodic signals. We show in an experiment with a circuit that many of the concepts used to describe crises may also be used to describe stochastic resonance. We speculate that stochastic resonance may be an example of a crisis. This would allow the use of dynamical concepts to describe a process that is usually considered statistically. RP CARROLL, TL (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. OI Carroll, Thomas/0000-0002-2371-2049 NR 18 TC 69 Z9 70 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 FEB 1 PY 1993 VL 70 IS 5 BP 576 EP 579 DI 10.1103/PhysRevLett.70.576 PG 4 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800015 ER PT J AU WAYLAND, R BROMLEY, D PICKETT, D PASSAMANTE, A AF WAYLAND, R BROMLEY, D PICKETT, D PASSAMANTE, A TI RECOGNIZING DETERMINISM IN A TIME-SERIES SO PHYSICAL REVIEW LETTERS LA English DT Article AB A quantitative measure of determinism in a recurrent time series is developed. Specifically, scalar time series data are used to form a vector series in reconstructed phase space. A statistic is then developed to measure the observed ''continuity'' of the vector series. The statistic is used as a measure of determinism. Several examples are included to demonstrate the effectiveness of the method. RP WAYLAND, R (reprint author), USN,CTR AIR WARFARE,DIV AIRCRAFT,WARMINSTER,PA 18974, USA. NR 5 TC 129 Z9 132 U1 1 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 FEB 1 PY 1993 VL 70 IS 5 BP 580 EP 582 DI 10.1103/PhysRevLett.70.580 PG 3 WC Physics, Multidisciplinary SC Physics GA KK248 UT WOS:A1993KK24800016 ER PT J AU DAHLBURG, JP GARDNER, JH DOOLEN, GD HAAN, SW AF DAHLBURG, JP GARDNER, JH DOOLEN, GD HAAN, SW TI THE EFFECT OF SHAPE IN THE 3-DIMENSIONAL ABLATIVE RAYLEIGH-TAYLOR INSTABILITY .1. SINGLE-MODE PERTURBATIONS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID HYDRODYNAMIC INSTABILITIES; NUMERICAL-SIMULATION; FUSION; GROWTH AB The nonlinear saturation amplitudes attained by Rayleigh-Taylor perturbations growing on ablatively stabilized laser fusion targets are crucial in determining the survival time of those targets. For a given set of baseline simulation parameters, the peak amplitude is found to be a progressive function of cross-sectional perturbation shape as well as of wave number, with three-dimensional (3-D) square modes and two-dimensional (2-D) axisymmetric bubbles saturating later, and at higher amplitudes than two-dimensional planar modes. In late nonlinear times hydrodynamic evolution diverges; the 3-D square mode bubble continues to widen, while the 2-D axisymmetric bubble fills in. C1 LOS ALAMOS NATL LAB, CTR NONLINEAR STUDIES, LOS ALAMOS, NM 87545 USA. LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RP USN, RES LAB, COMPUTAT PHYS & FLUID DYNAM LAB, WASHINGTON, DC 20375 USA. NR 25 TC 36 Z9 36 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD FEB PY 1993 VL 5 IS 2 BP 571 EP 584 DI 10.1063/1.860543 PG 14 WC Physics, Fluids & Plasmas SC Physics GA KL787 UT WOS:A1993KL78700030 ER PT J AU WINKLER, GMR AF WINKLER, GMR TI SYNCHRONIZATION AND RELATIVITY - REPLY SO PROCEEDINGS OF THE IEEE LA English DT Note RP WINKLER, GMR (reprint author), USN OBSERV,WASHINGTON,DC 20392, USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9219 J9 P IEEE JI Proc. IEEE PD FEB PY 1993 VL 81 IS 2 BP 306 EP 307 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA LC115 UT WOS:A1993LC11500011 ER PT J AU FOERSTER, JW AF FOERSTER, JW TI NORTHEAST NORTH PACIFIC-OCEAN - SURFACE CURRENT PATTERN SHIFTS DURING THE SPRING SO REMOTE SENSING OF ENVIRONMENT LA English DT Article ID CALIFORNIA CURRENT SYSTEM; BOUNDARY AB This work is a study of the interaction of the wind and the sea where easterly moving geostrophic flow becomes eastern boundary currents. To be as synoptic as possible, a satellite time series study (1983-1989) and an oceanographic survey (1989) concentrated on the Pacific Ocean surface waters adjacent to the northwest coast of North America. The hypothesis tested was that the changes in temperature contours of the sea surface infer a shift in current patterns. Of special interest are the surface current patterns during the spring transitional period (1 March-15 June). This is the time when the California current begins to dominate the eastern boundary currents, and biological production increases. At this time, the predominant wind patterns over the North Pacific change. These changes affect the water masses where the West Wind Drift becomes the California Current. By using the Advanced very High Resolution Radiometer (AVHRR) aboard NOAA's polar orbiter satellites, a pattern of current shifts over time is measurable. The results from analyzing 53 images over 7 years show a noticeable and distinct shift in surface temperature pattern during the spring period. This pattern shift was visible over time and space, and reflects the effect of the wind in changing the pattern of surface water current flow. Although limited in time and space, the ship-deployed instruments, also, reflect these changes and allow a look at the physical processes in the mixed layer. RP FOERSTER, JW (reprint author), USN ACAD,DEPT OCEANOG,ANNAPOLIS,MD 21402, USA. NR 22 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0034-4257 J9 REMOTE SENS ENVIRON JI Remote Sens. Environ. PD FEB PY 1993 VL 43 IS 2 BP 149 EP 159 DI 10.1016/0034-4257(93)90004-H PG 11 WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic Technology SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science & Photographic Technology GA KK487 UT WOS:A1993KK48700004 ER PT J AU BEARD, BC SANDUSKY, HW GLANCY, BC ELBAN, WL AF BEARD, BC SANDUSKY, HW GLANCY, BC ELBAN, WL TI QUANTITATIVE CORRELATION OF XPS LINEWIDTH WITH DISLOCATION DENSITY IN SHOCK-LOADED AMMONIUM-PERCHLORATE SO SURFACE AND INTERFACE ANALYSIS LA English DT Article ID RAY PHOTOELECTRON-SPECTROSCOPY; SIO2 AB The linewidths of x-ray photoelectron spectra have been correlated with dislocation densities in a shock-damaged crystal of ammonium perchlorate (AP). A centimeter-size AP crystal was non-uniformly damaged by a rapidly decaying shock (peak pressure of 24.4 kbar at the entry surface), recovered intact and cleaved. The cleaved planes permitted interior analysis of the crystal by x-ray photoelectron spectroscopy (XPS) over a pattern of 1 mm x 1 mm areas. The linewidth of the Cl 2p3/2 peak ranged from 1.70 eV for the region of greatest damage to 1.22 eV for the region demonstrating no visible damage, the same linewidth as that for unshocked AP (control). The correlation between dislocation density and XPS linewidth was quantitatively established by chemically etching and counting dislocations on cleaved planes from the shocked crystal. By this technique, a 100 x increase in dislocation density was determined for the region of greatest shock damage relative to undamaged crystal. Molecular orbital energy variation caused by distortion of the lattice in the vicinity of a dislocation is the physical mechanism responsible for the broadening of the photoelectron lines. Ab initio calculations of the Cl 2p energy level from various distorted perchlorate anion geometries have predicted orbital energy shifts sufficient to produce the observed linewidth broadening. C1 LOYOLA COLL,BALTIMORE,MD 21210. RP BEARD, BC (reprint author), USN,CTR SURFACE WARFARE,10901 NEW HAMPSHIRE AVE,SILVER SPRING,MD 20903, USA. NR 14 TC 1 Z9 1 U1 0 U2 3 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0142-2421 J9 SURF INTERFACE ANAL JI Surf. Interface Anal. PD FEB PY 1993 VL 20 IS 2 BP 140 EP 148 DI 10.1002/sia.740200208 PG 9 WC Chemistry, Physical SC Chemistry GA KR192 UT WOS:A1993KR19200006 ER PT J AU TRAN, TT THEVUTHASAN, S KIM, YJ FRIEDMAN, DJ KADUWELA, AP HERMAN, GS FADLEY, CS AF TRAN, TT THEVUTHASAN, S KIM, YJ FRIEDMAN, DJ KADUWELA, AP HERMAN, GS FADLEY, CS TI PHOTOELECTRON DIFFRACTION AND PHOTOELECTRON HOLOGRAPHY STUDY OF A GE(111) HIGH-TEMPERATURE SURFACE PHASE-TRANSITION SO SURFACE SCIENCE LA English DT Article ID SCANNING TUNNELING MICROSCOPY; BULK MELTING TEMPERATURE; GERMANIUM CRYSTAL; ATOMIC-RESOLUTION; ELECTRON-EMISSION; MEDIUM-ENERGY; RANGE ORDER; 111 SURFACE; CORE-LEVEL; SCATTERING AB Further evidence for a reversible high-temperature surface-disordering phase transition at approximately 1060 K on Ge(111) has been found using Ge 3p X-ray photoelectron diffraction (a short-range order probe of surface structure that is sensitive to the first 3-5 spheres of neighbors) and photoelectron holography (a recently suggested direct 3D imaging technique). Azimuthal diffraction data at takeoff angles of theta = 19-degrees (including nearest-neighbor forward-scattering directions and yielding high surface sensitivity) and theta = 55-degrees (for which second-nearest-neighbor forward-scattering directions and more bulk sensitivity are involved) show abrupt drops in intensity of approximately 30%-40% over the temperature interval of 900-1200 K. Photoelectron holographic near-neighbor images at temperatures both below and above the transition region furthermore indicate an identical near-neighbor structure for all atoms present in ordered sites. These combined diffraction and holography data show that by 1200 K, the Ge(111) surface is covered by a completely disordered overlayer of 2.0-2.5 Ge monolayers in thickness. The rate of growth of this overlayer with increasing temperature is also in excellent agreement with recent medium-energy ion scattering results, although the thicknesses we find for the overlayer are 1.5-2.0 times larger. A more detailed analysis of the theta = 19-degrees and the theta = 55-degrees data also suggests the possible presence of a partially disordered interface between the liquid-like overlayer and the bulk, also of 2 Ge monolayers in thickness and consisting of laterally strained domains. C1 UNIV CALIF DAVIS,DAVIS,CA 95616. NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. USN,RES LAB,WASHINGTON,DC 20375. RP TRAN, TT (reprint author), UNIV HAWAII,HONOLULU,HI 96822, USA. OI Kaduwela, Ajith/0000-0002-7236-2698 NR 49 TC 30 Z9 30 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD FEB 1 PY 1993 VL 281 IS 3 BP 270 EP 284 DI 10.1016/0039-6028(93)90640-6 PG 15 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA KK387 UT WOS:A1993KK38700010 ER PT J AU SKEATH, P QADRI, SB STEVIE, FA AF SKEATH, P QADRI, SB STEVIE, FA TI X-RAY-DIFFRACTION ANALYSIS OF TI-DIFFUSED SINGLE-CRYSTAL LINBO3 SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article ID LITHIUM-NIOBATE; TITANIUM DIFFUSION; OPTICAL-WAVEGUIDES; SPECTROSCOPY; DEPENDENCE AB Lattice changes due to Ti diffusion into single crystal LiNbO3 have been characterized by double crystal rocking curve measurements using the (220)hex, (226)hex, and (0012)hex reflections. Narrow full width at half-maxima of these reflections observed at low Ti concentrations indicate a high degree of lattice uniformity despite a substantial intrinsic defect density. The a lattice parameter of LiNbO3 varies bilinearly with Ti concentration, while the c lattice parameter variation is nearly zero. This result is consistent with a concentration-dependent Ti site in LiNbO3. The break in the bilinear function of the a lattice parameter occurs between a Ti concentration of 3% and 6% of the Li or Nb lattice sites. This strongly suggests that the Ti, below a concentration of 6%, replaces the Nb which is located in approximately 6% of the Li sites of congruent LiNbO3. The maximum solubility of Ti in LiNbO3 (at 1050-degrees-C) is deduced from the maximum change in a lattice parameter. C1 USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375. USN,RES LAB,DIV CONDENSED MATTER & RADIAT SCI,WASHINGTON,DC 20375. AT&T BELL LABS,ALLENTOWN,PA 18103. NR 25 TC 0 Z9 0 U1 1 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD JAN 29 PY 1993 VL 191 IS 1 BP 15 EP 19 DI 10.1016/0925-8388(93)90264-N PG 5 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA KM862 UT WOS:A1993KM86200004 ER PT J AU OLAH, GA RAMAIAH, P PRAKASH, GKS GILARDI, R AF OLAH, GA RAMAIAH, P PRAKASH, GKS GILARDI, R TI POLYNITRONORBORNANES, BICYCLOOCTANES, AND CYCLOHEXANES SO JOURNAL OF ORGANIC CHEMISTRY LA English DT Article ID NITRO-COMPOUNDS; SUBSTITUTION-REACTIONS; PRIMARY AMINES; CHEMISTRY; OXIDATION; DIMETHYLDIOXIRANE; CONVERSION; DIOXIRANES; PROCEED; OXIMES C1 UNIV SO CALIF,DEPT CHEM,LOS ANGELES,CA 90089. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. RP OLAH, GA (reprint author), UNIV SO CALIF,LOKER HYDROCARBON RES INST,LOS ANGELES,CA 90089, USA. NR 39 TC 10 Z9 10 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3263 J9 J ORG CHEM JI J. Org. Chem. PD JAN 29 PY 1993 VL 58 IS 3 BP 763 EP 765 DI 10.1021/jo00055a038 PG 3 WC Chemistry, Organic SC Chemistry GA KK263 UT WOS:A1993KK26300038 ER PT J AU TETTENBORN, CS SIEGEL, JN AF TETTENBORN, CS SIEGEL, JN TI MULTIPLE MECHANISMS UNDERLYING SYNERGY BETWEEN IL-3 AND SCF SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 USN,MED RES INST,ICBP,BETHESDA,MD 20889. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 26 PY 1993 SU 17B BP 69 EP 69 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN465 UT WOS:A1993KN46500239 ER PT J AU FINKELMAN, FD RYAN, JJ MORRIS, SC AF FINKELMAN, FD RYAN, JJ MORRIS, SC TI INDUCTION OF T-CELL ACTIVATION OR TOLERANCE BY ANTIGEN PRESENTING LYMPHOCYTES-B INVIVO SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 UNIFORMED SERV UNIV HLTH SCI,DEPT MED,BETHESDA,MD 20814. USN,MED RES INST,BETHESDA,MD 20814. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 26 PY 1993 SU 17B BP 164 EP 164 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN465 UT WOS:A1993KN46500578 ER PT J AU VICTORKOBRIN, C KUEHL, M AF VICTORKOBRIN, C KUEHL, M TI A CLONED MURINE B-LYMPHOMA HAS GENERATED VARIANTS WITH SOMATIC MUTATIONS IN H-CHAIN AND L-CHAIN V-REGIONS SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 NCI,USN,MED ONCOL BRANCH,BETHESDA,MD 20889. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 26 PY 1993 SU 17B BP 186 EP 186 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN465 UT WOS:A1993KN46500663 ER PT J AU BERGSAGEL, PL VICTORKOBRIN, C BRENTS, LA KUEHL, WM AF BERGSAGEL, PL VICTORKOBRIN, C BRENTS, LA KUEHL, WM TI THE IDENTIFICATION OF GENES SELECTIVELY EXPRESSED IN MURINE PLASMACYTOMAS SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 NCI,USN,MED ONCOL BRANCH,BETHESDA,MD 20889. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 26 PY 1993 SU 17B BP 240 EP 240 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN465 UT WOS:A1993KN46500863 ER PT J AU TRUMP, DH HYAMS, KC CROSS, ER STRUEWING, JP AF TRUMP, DH HYAMS, KC CROSS, ER STRUEWING, JP TI TUBERCULOSIS INFECTION AMONG YOUNG-ADULTS ENTERING THE UNITED-STATES NAVY IN 1990 SO ARCHIVES OF INTERNAL MEDICINE LA English DT Article ID PROGRAM C1 USN,CTR ENVIRONM HLTH,DEPT EPIDEMIOL,NORFOLK,VA 23511. USN,MED RES INST,DIV EPIDEMIOL,BETHESDA,MD 20814. USN,ENVIRONM & PREVENT MED UNIT 5,SAN DIEGO,CA 92132. RP TRUMP, DH (reprint author), NAVY ENVIRONM & PREVENT MED UNIT 7,PSC 810,BOX 41,FPO AE09619-4299,NAPLES,ITALY. RI Struewing, Jeffery/C-3221-2008; Struewing, Jeffery/I-7502-2013 OI Struewing, Jeffery/0000-0002-4848-3334 NR 18 TC 32 Z9 32 U1 0 U2 0 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0003-9926 J9 ARCH INTERN MED JI Arch. Intern. Med. PD JAN 25 PY 1993 VL 153 IS 2 BP 211 EP 216 DI 10.1001/archinte.153.2.211 PG 6 WC Medicine, General & Internal SC General & Internal Medicine GA KK027 UT WOS:A1993KK02700004 PM 8422208 ER PT J AU LUTTRELL, WE AF LUTTRELL, WE TI RESEARCH IN JAPAN SO SCIENCE LA English DT Letter RP LUTTRELL, WE (reprint author), USN HOSP,POSTAL SERV CTR 475,BOX 1810,APO,SAN FRANCISCO,CA 96350, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD JAN 22 PY 1993 VL 259 IS 5094 BP 442 EP 442 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA KJ079 UT WOS:A1993KJ07900005 ER PT J AU MEHUYS, D GOLDBERG, L WAARTS, R WELCH, DF AF MEHUYS, D GOLDBERG, L WAARTS, R WELCH, DF TI 4.5W CW, NEAR-DIFFRACTION-LIMITED TAPERED-STRIPE SEMICONDUCTOR OPTICAL AMPLIFIER SO ELECTRONICS LETTERS LA English DT Article DE OPTICAL AMPLIFIERS AB A 1.5 mm-long semiconductor amplifier injected with 150 mW from a discrete master oscillator emitted up to 4.5 W CW in a near-diffraction-limited beam at 860 nm. C1 USN,RES LAB,WASHINGTON,DC 20375. RP MEHUYS, D (reprint author), SPECTRA DIODE LABS INC,80 ROSE ORCHARD WAY,SAN JOSE,CA 95134, USA. NR 7 TC 12 Z9 12 U1 1 U2 1 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD JAN 21 PY 1993 VL 29 IS 2 BP 219 EP 221 DI 10.1049/el:19930150 PG 3 WC Engineering, Electrical & Electronic SC Engineering GA LB763 UT WOS:A1993LB76300059 ER PT J AU RUSSELL, AE LIN, AS OGRADY, WE AF RUSSELL, AE LIN, AS OGRADY, WE TI INSITU FAR-INFRARED EVIDENCE FOR A POTENTIAL DEPENDENCE OF SILVER WATER INTERACTIONS SO JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS LA English DT Article ID ENHANCED RAMAN-SPECTROSCOPY; MOLECULAR-DYNAMICS; ADSORBED HYDROGEN; DOUBLE-LAYER; SURFACE; ADSORPTION; ELECTRODES; AG(110); IONS; VIBRATIONS AB The influence of the adsorption of fluoride on the bonding of water to a silver electrode surface has been studied by observing the nu(Ag-O) stretching vibration in the far-IR. The experiments were conducted using potential-difference external-reflectance spectroscopy with synchrotron radiation as the far-IR source. It was found that the adsorption of fluoride ions at potentials positive of the potential of zero charge (p.z.c.) decreased the coverage of water adsorbed onto the silver electrode surface. At potentials negative of the p.z.c., water molecules were found to be bound to the silver surface through the oxygen atom. C1 USN,RES LAB,WASHINGTON,DC 20375. RP RUSSELL, AE (reprint author), UNIV LIVERPOOL,DEPT CHEM,POB 147,LIVERPOOL L69 3BX,ENGLAND. RI Russell, Andrea/B-8114-2009; Russell, Andrea/A-9625-2012 NR 32 TC 50 Z9 50 U1 0 U2 3 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0956-5000 J9 J CHEM SOC FARADAY T JI J. Chem. Soc.-Faraday Trans. PD JAN 21 PY 1993 VL 89 IS 2 BP 195 EP 198 DI 10.1039/ft9938900195 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA KJ761 UT WOS:A1993KJ76100003 ER PT J AU LAMING, JM FELDMAN, U AF LAMING, JM FELDMAN, U TI THE HE-II 1640-ANGSTROM MULTIPLET OBSERVED FROM SOLAR PROMINENCES SO ASTROPHYSICAL JOURNAL LA English DT Article DE ATOMIC PROCESSES; SUN, ABUNDANCES; SUN, PROMINENCES; SUN, UV RADIATION ID ELECTRON-IMPACT EXCITATION; LINE RATIOS; SI-III; O-III; SEMI-FORBIDDEN; C-III; SUN; TRANSITIONS; EMISSION; SPECTRUM AB We describe an analysis of EUV spectra of solar prominences taken with the S082-B instrument on Skylab, with special attention to the 1640 angstrom 2l-3l' multiplet of He II. It appears that the line intensities emitted from plasma at temperatures between 2 x 10(4) and 4 x 10(4) K can be explained by an ionization equilibrium model, incorporating photoexcitation and photoionization by incident radiation from the solar disk. With this interpretation, the data are consistent with an abundance for He of 0.1 relative to H. Some problems remain however in predicting the relative intensities of the components of the 1640 angstrom multiplet. C1 SFA INC,LANDOVER,MD 20785. RP LAMING, JM (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375, USA. NR 43 TC 13 Z9 13 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 JAN 20 PY 1993 VL 403 IS 1 BP 434 EP 440 DI 10.1086/172214 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KG277 UT WOS:A1993KG27700040 ER PT J AU PAULS, T JOHNSTON, KJ WILSON, TL MARR, JM RUDOLPH, A AF PAULS, T JOHNSTON, KJ WILSON, TL MARR, JM RUDOLPH, A TI HIGH-VELOCITY FORMALDEHYDE ABSORPTION WITHIN 30'' OF THE GALACTIC NUCLEUS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXY, CENTER; GALAXIES, NUCLEI; ISM, MOLECULES ID SAGITTARIUS-A COMPLEX; LINE OBSERVATIONS; SGR-A; RADIO; WEST; GAS; DYNAMICS; GALAXY; DISK AB We report VLA observations of the (1(10)-1(11)) fine of H2CO in absorption within 30'' of the Galactic center point source Sagittarius A* (Sgr A*) with a resolution of 20.6'' x 9.5'' at P.A. = 4-degrees, and an rms noise of 3.5 m Jy beam-1. The absorption peaks within 15'' of Sgr A*, and extends in velocity from about +135 km s-1 to at least -210 km s-1 (with some interruptions). We performed a number of baseline subtractions using different velocity intervals to define the continuum level. In all cases the absorption is definitely present. At positions offset +/-1' in latitude from Sgr A* there is no evidence for absorption at high velocities. Thus, the high-velocity gas may be close to, but is not coincident with, Sgr A*. The gas with velocities between -157 and -205 km s-1 is located east and northeast of the continuum peak, and gas at about +135 km s-1 is also located to the east. The position of the absorption relative to the continuum leads us to believe that the negative velocity molecular gas is behind Sgr A*. Because the gas is localized near Sgr A*, we do not think that there is any interaction with Sgr A East Taken together with observations of HCO+, HCN, and [O I], there are now several lines of evidence which indicate that the central cavity at the Galactic center contains a mixture of neutral and ionized gas. C1 MAX PLANCK INST RADIOASTRON,W-5300 BONN 1,GERMANY. UNIV MARYLAND,DEPT ASTRON,COLL PK,MD 20742. HAVERFORD COLL,DEPT ASTRON,HAVERFORD,PA 19041. RP PAULS, T (reprint author), USN,RES LAB,DIV REMOTE SENSING,WASHINGTON,DC 20375, USA. NR 20 TC 16 Z9 16 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 JAN 20 PY 1993 VL 403 IS 1 BP L13 EP & DI 10.1086/186710 PN 2 PG 0 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA KG282 UT WOS:A1993KG28200004 ER PT J AU ASKARI, F GEERNAEFT, GL KELLER, WC RAMAN, S AF ASKARI, F GEERNAEFT, GL KELLER, WC RAMAN, S TI RADAR IMAGING OF THERMAL FRONTS SO INTERNATIONAL JOURNAL OF REMOTE SENSING LA English DT Article ID MARINE BOUNDARY-LAYER; INTERACTION EXPERIMENT FASINEX; SYNTHETIC-APERTURE RADAR; CROSS-SECTION; OCEAN; WINDS; WAVES; GALE; BAND AB The paper investigates the physics of radar backscatter across sea surface temperature fronts using a simple drag model followed by actual airborne radar observations. The model predicts large changes in radar cross section for low wind speed conditions. The X-band (9.43 GHz) Real Aperture Radar (RAR) observations in the vicinity of the sea surface temperature fronts show that radar cross-section variations are largely dependent on the local wind direction with respect to the front and the change in wind stress response at the front and feedbacks from the larger scale buoyancy driven circulation Other radar imaging mechanisms are discussed. C1 N CAROLINA STATE UNIV,DEPT MARINE EARTH & ATMOSPHER SCI,RALEIGH,NC 27695. RP ASKARI, F (reprint author), USN,RES LAB,CTR ADV SPACE SENSING,WASHINGTON,DC 20375, USA. NR 33 TC 26 Z9 29 U1 0 U2 1 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0143-1161 J9 INT J REMOTE SENS JI Int. J. Remote Sens. PD JAN 20 PY 1993 VL 14 IS 2 BP 275 EP 294 PG 20 WC Remote Sensing; Imaging Science & Photographic Technology SC Remote Sensing; Imaging Science & Photographic Technology GA KL653 UT WOS:A1993KL65300007 ER PT J AU ZHOU, N GERMANN, MW VANDESANDE, JH PATTABIRAMAN, N VOGEL, HJ AF ZHOU, N GERMANN, MW VANDESANDE, JH PATTABIRAMAN, N VOGEL, HJ TI SOLUTION STRUCTURE OF THE PARALLEL-STRANDED HAIRPIN-D(T8/C4A8) AS DETERMINED BY 2-DIMENSIONAL NMR SO BIOCHEMISTRY LA English DT Article ID TWO-DIMENSIONAL NMR; SEQUENTIAL RESONANCE ASSIGNMENTS; MOLECULAR MECHANICS CALCULATIONS; RELAXATION MATRIX ANALYSIS; H-1-NMR SPECTRA; COUPLING-CONSTANTS; OLIGODEOXYRIBONUCLEOTIDE DUPLEX; CONFORMATIONAL-ANALYSIS; DNA DUPLEXES; DOUBLE HELIX AB The structure of the oligodeoxynucleotide (3')T8(5')-(5')C4A8(3') hairpin in aqueous solution was studied by two-dimensional (2D) proton and phosphorus nuclear magnetic resonance (NMR) spectroscopy. At 2.5 mM and 10-degrees-C, the molecule exists predominantly as a monomolecular hairpin with a C4 loop. At higher concentrations and lower temperatures, NMR signals from multimers are obvious. They account for approximately 25% of the total population at 4 mM and 10-degrees-C. Nearly all of the proton NMR signals for the hairpin could be assigned using 2D COSY, HOHAHA, and NOESY experiments. 2D H-1-P-31 correlation experiments were used to assign all the phosphorus resonances and to provide an additional check for the sequential assignments. A parallel-stranded T8.A8 stem can be formed in the hairpin due to the presence of the unusual 5'-5' linkage in the loop. 2D NOESY experiments indicate that the A H2 and its 5'-end neighbor base pair T methyl protons are within 5 angstrom of each other. This is in accord with reverse Watson-Crick base pairing between T and A, which locates the A H2 and the T methyl protons in the same groove of the duplex. The chemical shifts of A H1', H2', and H2'' sugar and the H2 base protons are quite different compared to normal B-DNA. Analysis of the 2D COSY and NOESY cross peak patterns indicates that the deoxyribose rings are mainly in the C2'-endo conformation and that the stem forms a right-handed helix, with the two strands held together by eight reverse Watson-Crick A-T base pairs to form a parallel-stranded duplex. The backbone torsion angles, as determined from the P-31 chemical shifts, are slightly different for the A and the T residues. A molecular model was constructed, using a total of 336 proton NOE cross peak intensities as proton-proton distance constraints. In there fined structure, the conformations of the sugar-phosphate linkage, the deoxyribose rings, and the glycosyl bonds for the two parallel strands of the hairpin are close to a regular B-DNA structure. The base-stacking and the hydrogen-bonding interactions are well optimized; however, the two grooves are of approximately equal width. Thus, compared to B-DNA, the parallel-stranded duplex has a very different surface shape, and because of the reverse Watson-Crick base pairing, it has different groups exposed in each groove. C1 UNIV CALGARY,DEPT BIOL SCI,CALGARY T2N 1N4,ALBERTA,CANADA. UNIV CALGARY,DEPT MED BIOCHEM,CALGARY T2N 1N4,ALBERTA,CANADA. USN,RES LAB,STRUCT MATTER LAB,WASHINGTON,DC 20375. RI German, Markus/L-1531-2013 NR 46 TC 22 Z9 22 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JAN 19 PY 1993 VL 32 IS 2 BP 646 EP 656 DI 10.1021/bi00053a033 PG 11 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA KH386 UT WOS:A1993KH38600033 PM 8380706 ER PT J AU FRANKEL, MY TADAYON, B CARRUTHERS, TF AF FRANKEL, MY TADAYON, B CARRUTHERS, TF TI INTEGRATION OF LOW-TEMPERATURE GAAS ON SI SUBSTRATES SO APPLIED PHYSICS LETTERS LA English DT Article ID PHOTOCONDUCTIVE DEVICES; SILICON AB GaAs was grown on Si substrates by molecular-beam epitaxy at low substrate temperatures. Femtosecond time-resolved reflectivity investigations revealed a significant reduction of carrier lifetime in GaAs epilayers from 14 ps to < 0.5 ps as the growth temperature was reduced from 400 to 150-degrees-C. Photoconductors were fabricated on the epilayers, and electro-optic sampling was used to confirm the electrical response times of < 1 ps. The responsivity is comparable to that for low-substrate-temperature GaAs grown on GaAs substrates, with a photogenerated carrier mobility of approximately 100-300 cm2/V s. The low growth temperatures allow ultrafast GaAs-based photodetector incorporation into Si-based integrated circuits for novel optoelectronic applications. RP FRANKEL, MY (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 18 TC 19 Z9 19 U1 0 U2 3 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 JAN 18 PY 1993 VL 62 IS 3 BP 255 EP 257 DI 10.1063/1.109620 PG 3 WC Physics, Applied SC Physics GA KG799 UT WOS:A1993KG79900016 ER PT J AU KIM, OK CHOI, LS LONG, T MCGRATH, K ARMISTEAD, JP YOON, TH AF KIM, OK CHOI, LS LONG, T MCGRATH, K ARMISTEAD, JP YOON, TH TI UNUSUAL COMPLEXATION BEHAVIOR OF POLY(ACRYLIC ACID) INDUCED BY SHEAR SO MACROMOLECULES LA English DT Article ID POLYMER-SOLUTIONS; DRAG REDUCTION; FLOW; COIL AB Poly(acrylic acid) (PAA) in dilute solution undergoes a stable interchain association under high shear flow. This is reflected in a sharp decrease in drag reduction (DR). For this flow-induced deformation to occur the PAA must be of ultrahigh molecular weight (greater-than-or-equal-to 5 X 10(6)), in low concentration (<5 X 10(-4) M), and in a pH range of 6-8. Addition of a minute amount of salt to the shearing PAA solution induced a full recovery of the DR, suggesting a disruption of interchain association. Fluorescence emission of auramine O (AuO) that appears only upon shearing suggests that the shearing has developed a rigidity along the PAA chains. This is probably the direct result of supermolecular chain complexation by interchain H-bonding. The formation and stability of the supermolecular H-bonding is characterized by AuO fluorescence, FTIR, and Na-23 NMR spectra as well as DR. C1 GEOCENTERS INC,FT WASHINGTON,MD 20744. RP KIM, OK (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 27 TC 13 Z9 13 U1 1 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD JAN 18 PY 1993 VL 26 IS 2 BP 379 EP 384 DI 10.1021/ma00054a018 PG 6 WC Polymer Science SC Polymer Science GA KH579 UT WOS:A1993KH57900018 ER PT J AU PLATT, N SPIEGEL, EA TRESSER, C AF PLATT, N SPIEGEL, EA TRESSER, C TI ON-OFF INTERMITTENCY - A MECHANISM FOR BURSTING SO PHYSICAL REVIEW LETTERS LA English DT Article AB On-off intermittency is an aperiodic switching between static, or laminar, behavior and chaotic bursts of oscillation. It can be generated by systems having an unstable invariant (or quasi-invariant) manifold, within which is found a suitable attractor. We clarify the roles of such attractors in producing intermittency, provide examples, and relate them to previous work. C1 COLUMBIA UNIV,DEPT ASTRON,NEW YORK,NY 10027. IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. RP PLATT, N (reprint author), USN,CTR SURFACE WARFARE,SILVER SPRING,MD 20903, USA. NR 12 TC 535 Z9 542 U1 2 U2 10 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 JAN 18 PY 1993 VL 70 IS 3 BP 279 EP 282 DI 10.1103/PhysRevLett.70.279 PG 4 WC Physics, Multidisciplinary SC Physics GA KG618 UT WOS:A1993KG61800008 ER PT J AU GANGULY, AK HIRSHFIELD, JL AF GANGULY, AK HIRSHFIELD, JL TI NONLINEAR-THEORY OF GYROHARMONIC RADIATION FROM SPATIOTEMPORALLY MODULATED ELECTRON-BEAMS SO PHYSICAL REVIEW LETTERS LA English DT Article ID TRAVELING-WAVE AMPLIFIER; GYROTRON; ACCELERATOR AB A multimode nonlinear particle simulation code is used to find the saturated efficiency for power transfer into modes of a cylindrical waveguide carrying a spatiotemporally modulated gyrating electron beam. For a TE51-mode fifth harmonic 94-GHz harmonic converter using a 150-kV, 6.7-A cold beam, this code predicts a conversion efficiency of 57% when a linearly tapered guide magnetic field is used, and 70% when a nonlinear taper is used. Efficiency in the linear taper case is shown to be insensitive to beam axial velocity spread, while both cases show negligible power flow into competing modes. C1 OMEGA P INC,NEW HAVEN,CT 06520. YALE UNIV,DEPT PHYS,NEW HAVEN,CT 06511. RP GANGULY, AK (reprint author), USN,RES LAB,CODE 6841,WASHINGTON,DC 20375, USA. NR 14 TC 16 Z9 16 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 JAN 18 PY 1993 VL 70 IS 3 BP 291 EP 294 DI 10.1103/PhysRevLett.70.291 PG 4 WC Physics, Multidisciplinary SC Physics GA KG618 UT WOS:A1993KG61800011 ER PT J AU SHAKIR, KMM MICHAELS, RD HAYS, JH POTTER, BB AF SHAKIR, KMM MICHAELS, RD HAYS, JH POTTER, BB TI THE USE OF BILE-ACID SEQUESTRANTS TO LOWER SERUM THYROID-HORMONES IN IATROGENIC HYPERTHYROIDISM SO ANNALS OF INTERNAL MEDICINE LA English DT Note DE HYPERTHYROIDISM; MYOCARDIAL INFARCTION; THYROID HORMONES; CHOLESTYRAMINE; LEVOTHYROXINE AB Hyperthyroidism occasionally must be rapidly restored to euthyroidism, especially if it is associated with an emergent condition such as myocardial infarction. Several modalities are available to render endogenous hyperthyroid patients to a euthyroid state rapidly. Few therapeutic options, however, are available to rapidly treat hyperthyroidism caused by ingestion of excess thyroid hormones, except perhaps the use of beta-blockers. We observed hypothyroidism develop in two patients taking stable doses of levothyroxine after cholestyramine was added to their drug regimen. This finding led us to treat two patients with iatrogenic hyperthyroidism with cholestyramine. A euthyroid state was achieved in 72 to 96 hours whereas in three similar patients without cholestyramine treatment it had taken almost 8 days for serum thyroid hormone levels to fall into normal range. Our preliminary results suggest that bile acid sequestrants may be useful in treating exogenous thyroid-hormone-induced hyperthyroidism in emergent situations. C1 UNIFORMED SERV UNIV HLTH SCI,BETHESDA,MD 20814. RP SHAKIR, KMM (reprint author), USN,NATL NAVAL MED CTR,DIV ENDOCRINOL & METAB,BETHESDA,MD 20889, USA. NR 6 TC 27 Z9 27 U1 0 U2 0 PU AMER COLL PHYSICIANS PI PHILADELPHIA PA INDEPENDENCE MALL WEST 6TH AND RACE ST, PHILADELPHIA, PA 19106-1572 SN 0003-4819 J9 ANN INTERN MED JI Ann. Intern. Med. PD JAN 15 PY 1993 VL 118 IS 2 BP 112 EP 113 PG 2 WC Medicine, General & Internal SC General & Internal Medicine GA KF918 UT WOS:A1993KF91800006 PM 8416306 ER PT J AU COHEN, RB ABDALLAH, JM GRAY, JR FOSS, F AF COHEN, RB ABDALLAH, JM GRAY, JR FOSS, F TI REVERSIBLE NEUROLOGIC TOXICITY IN PATIENTS TREATED WITH STANDARD-DOSE FLUDARABINE PHOSPHATE FOR MYCOSIS-FUNGOIDES AND CHRONIC LYMPHOCYTIC-LEUKEMIA SO ANNALS OF INTERNAL MEDICINE LA English DT Note DE LEUKEMIA, LYMPHATIC, CHRONIC; MYCOSIS FUNGOIDES; FLUDARABINE PHOSPHATE; CENTRAL NERVOUS SYSTEM DISEASES; NEUROLOGIC MANIFESTATIONS ID NERVOUS-SYSTEM TOXICITY; PHASE-I AB Fludarabine phosphate is approved for the treatment of advanced B-cell chronic lymphocytic leukemia refractory to alkylating agents. We report two cases of disabling but reversible neurotoxicity in a patient with mycosis fungoides and a patient with chronic lymphocytic leukemia who received standard doses of fludarabine (20 to 25 mg m2 per day for 5 days) every 28 days for 6 to 8 cycles). Serial brain magnetic resonance imaging scans in the patient with mycosis fungoides showed rapid evolution of white-matter changes with subsequent complete resolution. C1 NCI,BETHESDA,MD 20892. RP COHEN, RB (reprint author), USN,NATL NAVAL MED CTR,NCI,MED ONCOL BRANCH,BETHESDA,MD 20889, USA. NR 9 TC 40 Z9 41 U1 0 U2 2 PU AMER COLL PHYSICIANS PI PHILADELPHIA PA INDEPENDENCE MALL WEST 6TH AND RACE ST, PHILADELPHIA, PA 19106-1572 SN 0003-4819 J9 ANN INTERN MED JI Ann. Intern. Med. PD JAN 15 PY 1993 VL 118 IS 2 BP 114 EP 116 PG 3 WC Medicine, General & Internal SC General & Internal Medicine GA KF918 UT WOS:A1993KF91800007 PM 8416307 ER PT J AU STAHLBUSH, RE EDWARDS, AH GRISCOM, DL MRSTIK, BJ AF STAHLBUSH, RE EDWARDS, AH GRISCOM, DL MRSTIK, BJ TI POSTIRRADIATION CRACKING OF H2 AND FORMATION OF INTERFACE STATES IN IRRADIATED METAL-OXIDE-SEMICONDUCTOR FIELD-EFFECT TRANSISTORS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID LOW-TEMPERATURE IRRADIATION; 111 SI/SIO2 INTERFACE; VITREOUS SILICA; MOLECULAR-HYDROGEN; MOS STRUCTURES; TRAP FORMATION; RADIATION; DEVICES; CHARGE; GENERATION AB Molecular hydrogen is alternately introduced into and removed from the gate oxide of irradiated metal-oxide-semiconductor field-effect transistors at room temperature by changing the ambient between forming gas (10/90% H-2/N2) and nitrogen. Using charge pumping, it is observed that H-2 causes a simultaneous buildup of interface states and decrease of trapped positive charge. The results are explained by a reaction sequence in which H-2 is cracked to form mobile H+, which under positive bias drifts to the Si/SiO2 interface, and reacts to produce a dangling-bond defect. The rate limiting step over most of the time domain studied is the cracking process. Two types of cracking sites are modeled by molecular orbital calculations: oxygen vacancies (E' centers) and broken bond hole traps (BBHTs). Initial- and final-state energies, as well as the activation energies, are calculated. The calculations indicate that the latter is the more likely H-2 cracking site. The combined experimental and theoretical results suggest that at least 15% of the trapped positive charge is at sites similar to the BBHT sites. Implications of the model and similarities between interface-state formation by cracked H-2 and irradiation are discussed. C1 UNIV N CAROLINA,DEPT ELECT ENGN,CHARLOTTE,NC 28223. RP STAHLBUSH, RE (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 49 TC 133 Z9 135 U1 4 U2 11 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 JAN 15 PY 1993 VL 73 IS 2 BP 658 EP 667 DI 10.1063/1.353348 PG 10 WC Physics, Applied SC Physics GA KG476 UT WOS:A1993KG47600022 ER PT J AU MARKS, CM BURRIS, HR GRUN, J SNAIL, KA AF MARKS, CM BURRIS, HR GRUN, J SNAIL, KA TI STUDIES OF TURBULENT OXYACETYLENE FLAMES USED FOR DIAMOND GROWTH SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID OXYGEN-ACETYLENE FLAME; HIGH-QUALITY DIAMOND; COMBUSTION-FLAME; DEPOSITION; MECHANISM; CRYSTALS; TORCH; FILMS; GAS AB Turbulence in the flame of an oxyacetylene torch used for diamond growth was studied with mass spectrometry and dark-field shadowgraphy. H-2, CO, N2, and C2H2 were observed in both laminar and turbulent diamond growing flames, while O2, CO2, and H2O were detected in only the turbulent flame. Dark-field shadowgraphs showed a broken, changing flame front in the turbulent flame, although the boundary layer remained laminar under all flow conditions. The broken flame front suggests that unburned gases are passing through the turbulent flame front to form the detected oxidation products. A model is proposed in which the gas phase environment above the surface in turbulent flame diamond growth oscillates between oxidizing and reducing conditions. C1 RES SUPPORT INSTRUMENTS, ALEXANDRIA, VA 23314 USA. USN, RES LAB, DIV PLASMA PHYS, WASHINGTON, DC 20375 USA. RP USN, RES LAB, DIV OPT SCI, CODE 5622, WASHINGTON, DC 20375 USA. NR 36 TC 18 Z9 18 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD JAN 15 PY 1993 VL 73 IS 2 BP 755 EP 759 DI 10.1063/1.353333 PG 5 WC Physics, Applied SC Physics GA KG476 UT WOS:A1993KG47600036 ER PT J AU STRONG, AE AF STRONG, AE TI A NOTE ON THE POSSIBLE CONNECTION BETWEEN THE EL-CHICHON ERUPTION AND OCEAN PRODUCTION IN THE NORTHWEST ARABIAN SEA DURING 1982 SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Note AB The coastal zone color scanner (CZCS) has provided what may be the most convincing evidence to date of a large-scale ocean response to a volcanic eruption. Brock and McClain's (1992) 4-year time series of pigments over the Arabian Sea appears to reveal a slowdown in production over much of this basin. Apparently, the entire southwest monsoon relaxed beneath the tremendous pall of the El Chichon aerosol cloud that had overshadowed the region 4 months earlier, producing dramatically reduced concentrations of phytoplankton during summer and fall 1982. RP STRONG, AE (reprint author), USN,NOAA,NATL ENVIRONM SATELLITE DATA & INFORMAT SERV,ANNAPOLIS,MD 21402, USA. RI Strong, Alan/E-7924-2011 NR 10 TC 4 Z9 4 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-OCEANS JI J. Geophys. Res.-Oceans PD JAN 15 PY 1993 VL 98 IS C1 BP 985 EP 987 DI 10.1029/92JC02443 PG 3 WC Oceanography SC Oceanography GA KG675 UT WOS:A1993KG67500012 ER PT J AU HIRSCHBERG, PA FRITSCH, JM AF HIRSCHBERG, PA FRITSCH, JM TI A STUDY OF THE DEVELOPMENT OF EXTRATROPICAL CYCLONES WITH AN ANALYTIC MODEL .1. THE EFFECTS OF STRATOSPHERIC STRUCTURE SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID BAROCLINIC WAVES; DIABATIC PROCESSES; CYCLOGENESIS; DISTURBANCES; GROWTH; EVENT; STORM AB A new five-layer, quasigeostrophic model of baroclinic development is utilized to examine the initial-value problem sensitivity of extratropical cyclogenesis to the variation of stratospheric thermal and geopotential configurations associated with tropopause undulations. Previous studies have suggested that such undulations or potential vorticity anomalies can influence both the structure and evolution of lower-tropospheric cyclones. A series of experiments with the five-layer model are performed to evaluate the sensitivity of the model height, vertical motion, and height tendency patterns to various. Stratospheric temperature and geopotential distributions. It is found that idealized tropospheric baroclinic systems do not show typically observed characteristics unless certain stratospheric temperature, geopotential, and wind anomaly configurations associated with tropopause undulations are present. Furthermore, for given tropospheric patterns, there are particular lower-stratospheric configurations that optimize the development of model lower-tropospheric cyclones. These stratospheric configurations are functions of 1) the value of the lower-stratospheric temperature anomaly, 2) the amplitude of the tropopause undulation, and 3) the horizontal location of the undulation relative to the tropospheric temperature anomalies. Finally, both the rate of cyclogenesis and the amplification of the tropopause undulation increase if tropospheric static stability is reduced. C1 PENN STATE UNIV,DEPT METEOROL,UNIV PK,PA 16802. RP HIRSCHBERG, PA (reprint author), USN,POSTGRAD SCH,DEPT METEOROL,CODE MR-HS,MONTEREY,CA 93943, USA. NR 39 TC 8 Z9 9 U1 1 U2 1 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0022-4928 J9 J ATMOS SCI JI J. Atmos. Sci. PD JAN 15 PY 1993 VL 50 IS 2 BP 311 EP 327 DI 10.1175/1520-0469(1993)050<0311:ASOTDO>2.0.CO;2 PG 17 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA KL111 UT WOS:A1993KL11100009 ER PT J AU GLASER, ER KENNEDY, TA GODBEY, DJ THOMPSON, PE WANG, KL CHERN, CH AF GLASER, ER KENNEDY, TA GODBEY, DJ THOMPSON, PE WANG, KL CHERN, CH TI PHOTOLUMINESCENCE AND OPTICALLY DETECTED MAGNETIC-RESONANCE OF SI/SI1-XGEX STRAINED-LAYER SUPERLATTICES GROWN BY MOLECULAR-BEAM EPITAXY SO PHYSICAL REVIEW B LA English DT Article ID SI1-XGEX ALLOYS; QUANTUM-WELLS; BAND-GAP; EXCITONS; SILICON AB Photoluminescence (PL) and optically detected magnetic-resonance (ODMR) experiments have been performed on a set of Si/Si1-xGex strained-layer superlattices grown by molecular-beam epitaxy. A variety of parameters was explored to expand on the results of an earlier investigation and to test models proposed for the origin of the broad emission bands. These include the dependences of the magnetic resonance on temperature, microwave power, and excitation power density. In addition, sets of samples were grown to study the PL and ODMR as a function of layer thickness, Ge composition, total superlattice thickness, and doping with group-V impurities. The results provide clear evidence that the recombining holes derive from the strain-split M(J) = +/-3/2 valence band in the Si1-xGex layers. Although the identification of the recombining electron is not as strong as that made for the hole, it can be associated with the valley-degenerate Si/Si1-xGex conduction band. When these conclusions from the ODMR are combined with results from the PL and other studies, the most appealing model for the origin of the broad emission bands is donor-acceptor pair recombination. C1 UNIV CALIF LOS ANGELES,DEPT ELECT ENGN,DEVICE RES LAB,LOS ANGELES,CA 90024. RP GLASER, ER (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 39 TC 26 Z9 26 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 JAN 15 PY 1993 VL 47 IS 3 BP 1305 EP 1315 DI 10.1103/PhysRevB.47.1305 PG 11 WC Physics, Condensed Matter SC Physics GA KJ518 UT WOS:A1993KJ51800021 ER PT J AU BENNING, PJ OHNO, TR WEAVER, JH MUKHERJEE, P ADCOCK, JL COMPTON, RN DUNLAP, BI AF BENNING, PJ OHNO, TR WEAVER, JH MUKHERJEE, P ADCOCK, JL COMPTON, RN DUNLAP, BI TI ELECTRONIC-STRUCTURE OF HIGHLY FLUORINATED C-60 SO PHYSICAL REVIEW B LA English DT Article ID C60; BUCKMINSTERFULLERENE; CARBON; STATES; KXC60 AB Synchrotron-radiation photoemission was used to investigate the valence bands and C Is core-level features of thin films of C60Fx, x=46+/-2. The valence-band spectra show seven distinct features and a bandwidth of approximately 12 eV. Comparison of the calculated and experimental 40-eV photoemission spectra and the C Is core-level shifts suggests that the CF bond distances are closer to those of fluoromethane than to those of icosahedral C60F60 optimized within the local-density approximation. The valence-band maximum is approximately 5 eV below the Fermi level E(F), indicating that C60F46+/-2 is a wide-band-gap insulator. The deposition of potassium atoms on these fluorinated C60 films results in the partial removal of fluorine to form KF. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. USN,RES LAB,DIV CHEM,THEORET CHEM SECT,WASHINGTON,DC 20375. RP BENNING, PJ (reprint author), UNIV MINNESOTA,DEPT MAT SCI & CHEM ENGN,MINNEAPOLIS,MN 55455, USA. RI Ohno, Timothy/J-9384-2014; OI Dunlap, Brett/0000-0003-1356-6559 NR 30 TC 31 Z9 32 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 JAN 15 PY 1993 VL 47 IS 3 BP 1589 EP 1592 DI 10.1103/PhysRevB.47.1589 PG 4 WC Physics, Condensed Matter SC Physics GA KJ518 UT WOS:A1993KJ51800056 ER PT J AU YANG, MJ LINCHUNG, PJ SHANABROOK, BV WATERMAN, JR WAGNER, RJ MOORE, WJ AF YANG, MJ LINCHUNG, PJ SHANABROOK, BV WATERMAN, JR WAGNER, RJ MOORE, WJ TI ENHANCEMENT OF CYCLOTRON MASS IN SEMICONDUCTOR QUANTUM-WELLS SO PHYSICAL REVIEW B LA English DT Note ID ELECTRONIC-PROPERTIES; RESONANCE; HETEROSTRUCTURES; DENSITIES; INSB; INAS; GAAS AB The spin-resolved cyclotron resonance of a two-dimensional electron ps in an InAs quantum well sandwiched by AlSb barriers has been investigated to determine the energy dependence of the effective mass. We observe variations of the cyclotron mass correlated with the filling factor due to the linear dependence of the effective mass and Lande g factor on the electron energy. The experimental results are analyzed by the envelope-function approximation under a four-band k.p model which leads to a renormalized effective mass in the well. Excellent agreement with experiment is achieved and we are able to conclude that the effective mass is enhanced as a result of the penetration of electron wave functions into the barrier. RP YANG, MJ (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 21 TC 40 Z9 40 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 15 PY 1993 VL 47 IS 3 BP 1691 EP 1694 DI 10.1103/PhysRevB.47.1691 PG 4 WC Physics, Condensed Matter SC Physics GA KJ518 UT WOS:A1993KJ51800080 ER PT J AU ZEIDLER, JR HEWETT, CA WILSON, RG AF ZEIDLER, JR HEWETT, CA WILSON, RG TI CARRIER ACTIVATION AND MOBILITY OF BORON-DOPANT ATOMS IN ION-IMPLANTED DIAMOND AS A FUNCTION OF IMPLANTATION CONDITIONS SO PHYSICAL REVIEW B LA English DT Article ID SEMICONDUCTING DIAMOND; OHMIC CONTACTS; LAYERS; CARBON; FILMS AB Natural type-Ila diamonds were implanted with either boron alone, or carbon plus boron at 77, 300, or 800 K. van der Pauw resistivity and Hall effect measurements of carrier concentration and mobility were made as a function of temperature to determine the most effective implantation conditions for semiconducting device applications. No measurable dopant incorporation occurs for the 800-K implant. The highest carrier concentration and mobility are observed when the implantation is carried out at 77 K. It is further shown that a significant increase in the hole concentration occurs when carbon is implanted prior to boron. These measurements provide direct confirmation of the theoretical predictions of Prins and co-workers. It is shown, however that the carbon co-implant results in a decreased hole mobility. A multiple-step, low-temperature boron-ion implantation procedure that used three different implantation energies to produce an approximately uniformly doped p-type layer of about 200 nm thickness (as verified by secondary-ion-mass spectrometry on a separate sample) produced the best combination of carrier concentration and mobility. The resulting doped layer was used in the fabrication of an insulated-gate field-effect transistor that demonstrated current saturation and pinch-off at room temperature. C1 HUGHES RES LABS,MALIBU,CA 90265. RP ZEIDLER, JR (reprint author), USN,CTR COMMAND CONTROL & OCEAN SURVEILLANCE,DIV DEV TEST & EVALUAT,SAN DIEGO,CA 92152, USA. NR 31 TC 16 Z9 16 U1 0 U2 4 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 JAN 15 PY 1993 VL 47 IS 4 BP 2065 EP 2071 DI 10.1103/PhysRevB.47.2065 PG 7 WC Physics, Condensed Matter SC Physics GA KK584 UT WOS:A1993KK58400041 ER PT J AU LONG, JP GOLDENBERG, SS KABLER, MN AF LONG, JP GOLDENBERG, SS KABLER, MN TI PHOTOELECTRON-SPECTROSCOPY OF THE LASER-EXCITED (X)OVER-BAR SURFACE-STATE ON GAAS(110) USING SYNCHROTRON RADIATION SO PHYSICAL REVIEW B LA English DT Note ID RESOLVED INVERSE PHOTOEMISSION; RECOMBINATION; GAP AB An excited surface state on GaAs(110) has been investigated using a technique which populates the state with a laser pulse and measures its properties by time-resolved photoelectron spectroscopy using synchrotron radiation. Measurements of momentum, energy, and lifetime show that this is an intrinsic surface state near XBAR in the surface Brillouin zone which equilibrates with bulk conduction electrons during the 5-ns pump pulse. The narrow photoelectron band increases linearly in kinetic energy with the probe photon energy, and no final-state effects appear in the limited energy range investigated. RP LONG, JP (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 14 TC 2 Z9 2 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JAN 15 PY 1993 VL 47 IS 4 BP 2402 EP 2405 DI 10.1103/PhysRevB.47.2402 PG 4 WC Physics, Condensed Matter SC Physics GA KK584 UT WOS:A1993KK58400079 ER PT J AU JONES, HN AF JONES, HN TI THERMAL-ACTIVATION OF PLASTIC INSTABILITIES IN LOW-CARBON STEEL SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article RP JONES, HN (reprint author), USN,RES LAB,DIV MAT SCI & TECHNOL,WASHINGTON,DC 20375, USA. NR 9 TC 1 Z9 1 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 JAN 15 PY 1993 VL 28 IS 2 BP 225 EP 230 DI 10.1016/0956-716X(93)90567-C PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA KF148 UT WOS:A1993KF14800012 ER PT J AU FONTANELLA, JJ WINTERSGILL, MC SHANNON, RD CHAI, BHT AF FONTANELLA, JJ WINTERSGILL, MC SHANNON, RD CHAI, BHT TI EFFECT OF H2O ON DIELECTRIC-PROPERTIES OF BERLINITE .2. DIELECTRIC LOSS SO JOURNAL OF PHYSICS D-APPLIED PHYSICS LA English DT Article ID ALPHA-QUARTZ; RELAXATION; PRESSURE; ALUMINUM AB Audio frequency complex Impedance measurements have been carried out over the temperature range 5.5-38 K on samples of berlinite (aluminium phosphate) both parallel and perpendicular to the optic axis. The berlinite samples contain varying amounts of water. All of the berlinite samples exhibit a dielectric relaxation peak in the vicinity of 40 K and 1000 Hz. The data were best fit using an expression based on the stretched exponential (SE). The best fit SE parameter betaSE ranges from 0.68 to 0.85. In the direction perpendicular to the optic axis, the activation energy is approximately 0.053 eV and the relaxation is correlated with the aqueous solution inside inclusions. The relaxation parallel to the optic axis has an activation energy of about 0.049 eV and is attributed to hydroxyl ions at the surface of the inclusions. A dielectric relaxation peak is also observed near 240 K and 1000 Hz for the samples with a higher nominal water concentration. In addition, dielectric loss, which is attributed to trace impurities or Maxwell-Wagner polarization of inclusions, is observed in the vicinity of room temperature. C1 DUPONT CO,DEPT CENT RES & DEV,EXPTL STN,WILMINGTON,DE 19898. UNIV CENT FLORIDA,CTR RES ELECTROOPT & LASER,ORLANDO,FL 32826. RP FONTANELLA, JJ (reprint author), USN ACAD,DEPT PHYS,ANNAPOLIS,MD 21402, USA. NR 11 TC 2 Z9 2 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0022-3727 J9 J PHYS D APPL PHYS JI J. Phys. D-Appl. Phys. PD JAN 14 PY 1993 VL 26 IS 1 BP 101 EP 105 DI 10.1088/0022-3727/26/1/016 PG 5 WC Physics, Applied SC Physics GA KH167 UT WOS:A1993KH16700016 ER PT J AU GLESENER, JW SNAIL, KA MORRISH, AA AF GLESENER, JW SNAIL, KA MORRISH, AA TI ADMITTANCE SPECTROSCOPY OF BORON DOPED DIAMOND SO APPLIED PHYSICS LETTERS LA English DT Article ID SCHOTTKY BARRIERS AB The boron acceptor level in diamond was investigated using admittance spectroscopy. The conductance of a flame grown sample was measured between 125 and 200 K at five frequencies between 0.1 and 5.0 kHz using a 16.0 mV ac signal applied across a Schottky diode at zero dc bias. The admittance spectroscopy technique yielded a deep impurity level of 0.33 eV. From the same set of data, a hole capture cross section of 2 X 10(-12) cm2 was also measured. The cross section reported here is assumed to be caused by ionized boron acceptors. RP GLESENER, JW (reprint author), USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375, USA. NR 14 TC 6 Z9 6 U1 1 U2 3 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 JAN 11 PY 1993 VL 62 IS 2 BP 181 EP 183 DI 10.1063/1.109332 PG 3 WC Physics, Applied SC Physics GA KF689 UT WOS:A1993KF68900024 ER PT J AU DREWS, AR RUBINSTEIN, M STAUSS, GH BENNETT, LH SWARTZENDRUBER, LJ AF DREWS, AR RUBINSTEIN, M STAUSS, GH BENNETT, LH SWARTZENDRUBER, LJ TI NMR, MAGNETISM AND MOSSBAUER-EFFECT IN ICOSAHEDRAL AL63CU24.5FE12.5 - A THERMODYNAMICALLY STABLE QUASI-PERIODIC ALLOY SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article ID CRYSTALS; QUASICRYSTALS AB We report results of Al-27 nuclear magnetic resonance (NMR), magnetism and iron-site Mossbauer experiments on the thermodynamically stable and ''perfectly'' quasicrystalline icosahedral alloy Al63Cu24.5Fe12.5. NMR experiments were performed at 11.10, 17.8 and 45.7 MHz and at temperatures as low as 50 K. Magnetization was measured at 295, 100 and 5 K, while iron site Mossbauer was measured at 295 and 4.2 K. We find very small NMR Knight shifts and long relaxation times that we interpret as consistent with a pseudo-gap in the density of states near the Fermi level. NMR line shapes in AlCuFe do not show quadrupolar structure consistent with a single aluminum site. We report results of numerical simulations that effectively reproduce the features and trends in observed line shapes by means of a broad distribution of electric field gradients (EFGs) at aluminum sites. Our magnetization and Mossbauer effect experiments show that there is a very small fraction of the material that is magnetically ordered at low temperatures. This magnetic behavior was only observed well below the lowest temperature of NMR experiments and cannot be responsible for the broad NMR lines. Iron-site Mossbauer lines show significant broadening characteristic of a distribution of EFGs that is qualitatively similar to that indicated for the aluminum site. C1 NATL INST STAND & TECHNOL, GAITHERSBURG, MD 20899 USA. RP USN, RES LAB, MAT PHYS BRANCH, WASHINGTON, DC 20375 USA. NR 17 TC 7 Z9 7 U1 1 U2 1 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-8388 EI 1873-4669 J9 J ALLOY COMPD JI J. Alloy. Compd. PD JAN 11 PY 1993 VL 190 IS 2 BP 189 EP 195 DI 10.1016/0925-8388(93)90398-7 PG 7 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA KF326 UT WOS:A1993KF32600015 ER PT J AU BURNHAM, NA COLTON, RJ POLLOCK, HM AF BURNHAM, NA COLTON, RJ POLLOCK, HM TI WORK-FUNCTION ANISOTROPIES AS AN ORIGIN OF LONG-RANGE SURFACE FORCES - REPLY SO PHYSICAL REVIEW LETTERS LA English DT Note C1 USN,RES LAB,SURFACE CHEM BRANCH,WASHINGTON,DC 20375. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. RP BURNHAM, NA (reprint author), FORSCHUNGSZENTRUM JULICH,INST SCHICHT & IONENTECH,W-5170 JULICH 1,GERMANY. RI Burnham, Nancy/A-5210-2013 NR 3 TC 2 Z9 2 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JAN 11 PY 1993 VL 70 IS 2 BP 247 EP 247 DI 10.1103/PhysRevLett.70.247 PG 1 WC Physics, Multidisciplinary SC Physics GA KF880 UT WOS:A1993KF88000038 ER PT J AU ROWE, MM GETTRUST, JF AF ROWE, MM GETTRUST, JF TI FINE-STRUCTURE OF METHANE HYDRATE-BEARING SEDIMENTS ON THE BLAKE OUTER RIDGE AS DETERMINED FROM DEEP-TOW MULTICHANNEL SEISMIC DATA SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID DRILLING PROJECT LEG-76; GAS-HYDRATE; ISOTOPIC COMPOSITIONS; BOTTOM SEDIMENTS; SEA; SITE-533; HORIZONS AB High-resolution, deep-tow multichannel seismic data are used to investigate the detailed structure of sediments containing methane hydrate. These data support thick, laterally extensive layers of methane hydrate-bearing sediment underlain by a bottom simulating reflector (BSR) and spatially discontinuous zones of hydrate within the sediments above the BSR depth where rio BSR is present. These data resolve normal faults which extend from the surface through the BSR with apparent offsets of up to 20 m. A phase inversion identified at the top of the BSR shows that the material immediately beneath the BSR has anomalously low velocity, consistent with a layer of sediment containing free methane gas. The fault offsets along the BSR are consistent with a pressure change of approximately 200 kPa (approximately 2 bars) across the fault zone. RP ROWE, MM (reprint author), USN,RES LAB,CODE 362,BLDG 1005,BAY ST LOUIS,MS 39529, USA. NR 41 TC 47 Z9 52 U1 1 U2 6 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD JAN 10 PY 1993 VL 98 IS B1 BP 463 EP 473 DI 10.1029/92JB01706 PG 11 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA KG667 UT WOS:A1993KG66700008 ER PT J AU WEINSTEIN, SL JUNE, CH SANGHERA, JS PELECH, SL DEFRANCO, AL AF WEINSTEIN, SL JUNE, CH SANGHERA, JS PELECH, SL DEFRANCO, AL TI LPS-INDUCED PROTEIN TYROSINE PHOSPHORYLATION IN MACROPHAGES IS MEDIATED BY CD14 AND LEADS TO THE ACTIVATION OF MAP KINASES SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 UNIV CALIF SAN FRANCISCO,DEPT PHYSIOL,SAN FRANCISCO,CA 94143. UNIV CALIF SAN FRANCISCO,DEPT MICROBIOL IMMUNOL,SAN FRANCISCO,CA 94143. USN,RES INST,BETHESDA,MD 20814. UNIV BRITISH COLUMBIA,BIOMED RES CTR,VANCOUVER V6T 1Z3,BC,CANADA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 9 PY 1993 SU 17A BP 277 EP 277 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN464 UT WOS:A1993KN46401035 ER PT J AU ROLLWAGEN, FM PACHECO, ND LI, YY AUERBACH, R SNEED, R NIELSEN, TB AF ROLLWAGEN, FM PACHECO, ND LI, YY AUERBACH, R SNEED, R NIELSEN, TB TI CELL-SURFACE ANTIGEN EXPRESSION IN A MURINE ENDOTHELIOMA CELL-LINE IN RESPONSE TO CYTOKINES SO JOURNAL OF CELLULAR BIOCHEMISTRY LA English DT Meeting Abstract C1 USN,MED RES INST,BETHESDA,MD 20814. GEOCTR,FT WASHINGTON,MD. UNIV WISCONSIN,MADISON,WI 53706. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0730-2312 J9 J CELL BIOCHEM JI J. Cell. Biochem. PD JAN 9 PY 1993 SU 17A BP 335 EP 335 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA KN464 UT WOS:A1993KN46401245 ER PT J AU MURPHY, GS BASRI, H PURNOMO ANDERSEN, EM BANGS, MJ MOUNT, DL GORDEN, J LAL, AA PURWOKUSUMO, AR HARJOSUWARNO, S SORENSEN, K HOFFMAN, SL AF MURPHY, GS BASRI, H PURNOMO ANDERSEN, EM BANGS, MJ MOUNT, DL GORDEN, J LAL, AA PURWOKUSUMO, AR HARJOSUWARNO, S SORENSEN, K HOFFMAN, SL TI VIVAX MALARIA RESISTANT TO TREATMENT AND PROPHYLAXIS WITH CHLOROQUINE SO LANCET LA English DT Article ID FINGER-STICK BLOOD; PLASMODIUM-VIVAX; WHOLE-BLOOD; DESETHYLCHLOROQUINE; PYRIMETHAMINE; FALCIPARUM; INDONESIA; SAMPLES; PLASMA; SERUM AB Chloroquine has been the treatment of choice for vivax malaria for more than 40 years. Lately, several case-reports have suggested the emergence of resistance to chloroquine in Plasmodium vivax in Papua New Guinea and Indonesia. We undertook prospective treatment and prophylaxis trials of chloroquine in children and adults with vivax malaria living in Irian Jaya (Indonesian New Guinea). 46 villagers with P vivax parasitaemia were treated with chloroquine by mouth (25 mg base/kg body weight divided over 3 days) and followed up for 14 days. Parasitaemia cleared initially but recurred within 14 days in 10 (22%) subjects. All recurrences were in children younger than 11 years, 7 of whom were younger than 4 years; the failure rate among children under 4 was 70%. 7 of the patients with recurrences were given a second course of chloroquine. In all, the infections initially cleared but recurrent parasitaemia developed in 5 (71%) within 14 days. Whole-blood chloroquine concentrations were consistently above those previously shown to cure P vivax blood infections (90 mug/L whole blood). Subjects whose initial infections cleared and who had no parasitaemia on day 14 received weekly prophylaxis with chloroquine. Despite the presence of expected blood chloroquine concentrations, P vivax parasitaemia developed in 9 of 17 subjects receiving prophylaxis during 8 weeks of follow-up (median time to parasitaemia 5.3 weeks). Chloroquine can no longer be relied upon for effective treatment or chemoprophylaxis of P vivax blood infections acquired in this part of New Guinea. C1 USN,MED RES UNIT 2,JAKARTA,INDONESIA. MINIST HLTH REPUBL INDONESIA,JAKARTA,INDONESIA. CTR DIS CONTROL,MALARIA BRANCH,ATLANTA,GA 30333. USN,MED RES INST,BETHESDA,MD 20814. NR 29 TC 158 Z9 161 U1 0 U2 5 PU LANCET LTD PI LONDON PA 42 BEDFORD SQUARE, LONDON, ENGLAND WC1B 3SL SN 0140-6736 J9 LANCET JI Lancet PD JAN 9 PY 1993 VL 341 IS 8837 BP 96 EP 100 DI 10.1016/0140-6736(93)92568-E PG 5 WC Medicine, General & Internal SC General & Internal Medicine GA KF870 UT WOS:A1993KF87000015 PM 8093414 ER PT J AU BARRETT, DJ AF BARRETT, DJ TI ON THE USE OF STRESS COUPLING IN DAMPED PLATES SO JOURNAL OF SOUND AND VIBRATION LA English DT Letter RP BARRETT, DJ (reprint author), USN,CTR AIR WARFARE,DIV AIRCRAFT,ADV STRUCT TECHNOL BRANCH,CODE 6043,WARMINSTER,PA 18974, USA. NR 6 TC 2 Z9 2 U1 0 U2 0 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-460X J9 J SOUND VIB JI J. Sound Vibr. PD JAN 8 PY 1993 VL 160 IS 1 BP 187 EP 191 DI 10.1006/jsvi.1993.1016 PG 5 WC Acoustics; Engineering, Mechanical; Mechanics SC Acoustics; Engineering; Mechanics GA KH230 UT WOS:A1993KH23000016 ER PT J AU KUZMIK, J MICHELAKIS, C KONSTANTINIDIS, G PAPANICOLAOU, N AF KUZMIK, J MICHELAKIS, C KONSTANTINIDIS, G PAPANICOLAOU, N TI REACTIVE ION ETCHING OF BETA-SIC IN CCL2F2/O2 SO ELECTRONICS LETTERS LA English DT Article DE ETCHING; PLASMA; SEMICONDUCTOR TECHNOLOGY ID SILICON-CARBIDE; MIXTURES AB For the first time, the reactive ion etching (RIE) of beta-SiC in CCl2F2/O2 gas mixture is reported. The addition of oxygen to the CCl2F2 does not appear to enhance the etch rate, however, the RF power and the DC bias conditions prove to be the dominant factors for controlling the etch rate. In addition, fine line structures with vertical walls and smooth etched surfaces are achieved. C1 USN,RES LAB,WASHINGTON,DC 20375. RP KUZMIK, J (reprint author), FORTH,INST ELECTR STRUCT & LASERS,MICROELECTR RES GRP,POB 1527,GR-71110 IRAKLION,GREECE. RI Konstantinidis, George/A-1719-2014 OI Konstantinidis, George/0000-0002-1072-9618 NR 8 TC 2 Z9 2 U1 0 U2 1 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD JAN 7 PY 1993 VL 29 IS 1 BP 18 EP 19 DI 10.1049/el:19930012 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA LB760 UT WOS:A1993LB76000012 ER PT J AU TADAYON, S METZE, G CORNFELD, A PANDE, K HUANG, H TADAYON, B AF TADAYON, S METZE, G CORNFELD, A PANDE, K HUANG, H TADAYON, B TI APPLICATION OF MICRO-AIRBRIDGE ISOLATION IN HIGH-SPEED HBT FABRICATION SO ELECTRONICS LETTERS LA English DT Article DE BIPOLAR DEVICES; TRANSISTORS; SEMICONDUCTOR DEVICES AND MATERIALS AB A new selfaligned AlGaAs/GaAs heterojunction bipolar transistor (HBT) fabrication process is presented, featuring a deep wet etching that undercuts the base and the emitter interconnects, and forms micro-airbridges for device isolation. The advantages of this isolation process include critical lithographies on flat surfaces, capacitance reduction, and compatibility with thick collector layers. 1.5 x 10 mum2 HBT devices, grown by MOCVD, exhibit an F(max) of 120 GHz. C1 USN,RES LAB,WASHINGTON,DC 20375. RP TADAYON, S (reprint author), COMSAT LABS,22300 COMSAT DR,CLARKSBURG,MD 20871, USA. NR 2 TC 10 Z9 11 U1 1 U2 1 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD JAN 7 PY 1993 VL 29 IS 1 BP 26 EP 27 DI 10.1049/el:19930017 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA LB760 UT WOS:A1993LB76000017 ER PT J AU BUSSE, LE GOLDBERG, L MEHUYS, D MIZELL, G AF BUSSE, LE GOLDBERG, L MEHUYS, D MIZELL, G TI 3.O-W BLUE-LIGHT GENERATION BY FREQUENCY-DOUBLING OF BROAD AREA SEMICONDUCTOR AMPLIFIER EMISSION SO ELECTRONICS LETTERS LA English DT Article DE HARMONIC GENERATION; OPTICAL AMPLIFIERS; LASERS AB Broad area GaAlAs amplifier emission is frequency doubled in a single pass through a 2 cm long KNbO3 crystal. A maximum peak power of 3.0 W at 432 nm is achieved with 15.6 W of incident fundamental power and 0.3 mus long pulses, corresponding to a 19% nonlinear conversion efficiency. C1 SPECTRA DIODE LABS,SAN JOSE,CA 95134. VIRGO OPT,PORT RICHEY,FL 34668. RP BUSSE, LE (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. NR 5 TC 8 Z9 8 U1 0 U2 0 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD JAN 7 PY 1993 VL 29 IS 1 BP 77 EP 78 DI 10.1049/el:19930050 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA LB760 UT WOS:A1993LB76000050 ER PT J AU KERSEY, AD MOREY, WW AF KERSEY, AD MOREY, WW TI MULTIPLEXED BRAGG GRATING FIBER-LASER STRAIN-SENSOR SYSTEM WITH MODE-LOCKED INTERROGATION SO ELECTRONICS LETTERS LA English DT Article DE OPTICAL SENSORS; OPTICAL FIBERS; LASERS AB A technique for the detection of wavelength shifts in wavelength-encoded fibre Bragg grating sensors, which is capable of interrogating several sensors on a common fibre path using a mode-locked laser principle, is described. Preliminary results obtained using two sensor elements are presented. RP KERSEY, AD (reprint author), USN,RES LAB,DIV OPT SCI,CODE 6574,WASHINGTON,DC 20375, USA. NR 4 TC 83 Z9 98 U1 0 U2 7 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD JAN 7 PY 1993 VL 29 IS 1 BP 112 EP 114 DI 10.1049/el:19930073 PG 3 WC Engineering, Electrical & Electronic SC Engineering GA LB760 UT WOS:A1993LB76000073 ER PT J AU CALLAHAN, JH ROSS, MM WEISKE, T SCHWARZ, H AF CALLAHAN, JH ROSS, MM WEISKE, T SCHWARZ, H TI HIGH-ENERGY COLLISIONS OF CARBON CLUSTER CATIONS WITH HELIUM - EXPERIMENTAL SUPPORT FOR THE EXISTENCE OF IMPERFECT FULLERENE STRUCTURES SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Letter ID ENDOHEDRAL COMPLEXES; C60 CAGE; IONS; MOLECULES; ATOMS; C-60; REACTIVITY; STABILITY; CS AB High-energy (kilovolt) collisions of carbon cluster (fullerene) cations with helium are used to differentiate between species that do and do not satisfy the isolated pentagon rule (IPR). The initial studies of collisions of C60.+ and C70.+ with helium, which showed incorporation of the helium atom in the fullerene cage and inelastic scattering, have been extended to other C(x)+ with even x. We report here that, unlike C60.+ and C70.+, kilovolt collisions of C58+ and C68+ with helium do not yield a detectable helium/parent ion endohedral complex, (He @ C58)+ or (He @ C68)+, nor is an inelastic scattering ''foot'' in the kinetic energy distribution of the precursor ion detected. These two observations are taken as evidence of structures that are less stable than those that satisfy the IPR. However, adducts of helium with carbon cluster fragment ions, (C(x)He)+ with x < 58 or x < 68, are observed from C58.+ and C68.+ collisions with He, indicating that the helium is taken up by the parent ion yielding a relatively unstable product ion. C1 USN, RES LAB, DIV CHEM, CODE 6113, WASHINGTON, DC 20375 USA. TECH UNIV BERLIN, INST ORGAN CHEM, W-1000 BERLIN 12, GERMANY. NR 43 TC 13 Z9 13 U1 0 U2 1 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 JAN 7 PY 1993 VL 97 IS 1 BP 20 EP 22 DI 10.1021/j100103a006 PG 3 WC Chemistry, Physical SC Chemistry GA KG898 UT WOS:A1993KG89800006 ER PT J AU ROLISON, DR STEMPLE, JZ AF ROLISON, DR STEMPLE, JZ TI ELECTRIFIED MICROHETEROGENEOUS CATALYSIS IN LOW IONIC-STRENGTH MEDIA SO JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS LA English DT Article ID ULTRAMICROELECTRODES AB The ability to drive catalytic processes when dc voltages are applied to low ionic strength dispersions has been demonstrated for the selective partial oxidation of propene at 0-degrees-C in an aqueous dispersion of Pd(II)-Cu(II) supported on Y zeolite where the primary partial oxidation product can be either acetone or propylene oxide depending on the nature of the dispersed solid; in the absence of the applied electrifying force no product forms and in the absence of the molecular catalyst no selective oxidation occurs. RP ROLISON, DR (reprint author), USN, RES LAB, SURFACE CHEM BRANCH, CODE 6170, WASHINGTON, DC 20375 USA. NR 21 TC 14 Z9 14 U1 0 U2 0 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 0022-4936 J9 J CHEM SOC CHEM COMM JI J. Chem. Soc.-Chem. Commun. PD JAN 7 PY 1993 IS 1 BP 25 EP 27 DI 10.1039/c39930000025 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA KH239 UT WOS:A1993KH23900010 ER PT J AU WALLACE, MR ROSSETTI, RJ OLSON, PE AF WALLACE, MR ROSSETTI, RJ OLSON, PE TI CATS AND TOXOPLASMOSIS RISK IN HIV-INFECTED ADULTS SO JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION LA English DT Note ID ENCEPHALITIS; PREVALENCE; GONDII; AIDS AB Objective.-To establish the prevalence and incidence of toxoplasmosis in an adult human immunodeficiency virus (HIV) population, and to determine if cat ownership contributes to the risk of toxoplasmosis. Design.-Retrospective record and laboratory review, coupled with a patient survey. Setting.-A tertiary-care military hospital HIV program. Patients.-A total of 723 HIV-infected adults, all former or current US military personnel. Main Outcome Measures.-Prevalence and incidence of serologic evidence of toxoplasmosis infection. Results.-A total of 723 HIV-infected patients had serial Toxoplasma IgG antibody determinations. Seventy patients (9.7%) were positive on their initial screen; the seronegative patients were tested annually for 1 to 5 years (mean duration of follow-up, 2.1 years). Only 13 patients (2.0%) who were initially seronegative acquired antibodies to Toxoplasma gondii. None of the patients who seroconverted developed clinical disease. A pet history was available on 12 of 13 patients who seroconverted; only one (8.3%) had owned or lived in a household with a cat during the period of seroconversion. The calculated attributable risk of cat ownership/exposure for toxoplasmosis seroconversion in this population is -2.9 per 100 persons annually. Conclusion.-Toxoplasma antibody seroconversion in an adult HIV-infected population is unusual and appears unrelated to cat ownership or exposure. C1 USN HOSP,DEPT CLIN INVEST,SAN DIEGO,CA 92134. RP WALLACE, MR (reprint author), USN HOSP,DEPT INTERNAL MED,DIV INFECT DIS,SAN DIEGO,CA 92134, USA. NR 13 TC 59 Z9 60 U1 1 U2 3 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0098-7484 J9 JAMA-J AM MED ASSOC JI JAMA-J. Am. Med. Assoc. PD JAN 6 PY 1993 VL 269 IS 1 BP 76 EP 77 DI 10.1001/jama.269.1.76 PG 2 WC Medicine, General & Internal SC General & Internal Medicine GA KF026 UT WOS:A1993KF02600031 PM 8416410 ER PT J AU HOFF, HA VESTYCK, DJ BUTLER, JE PRINS, JF AF HOFF, HA VESTYCK, DJ BUTLER, JE PRINS, JF TI ION-IMPLANTED, OUTDIFFUSION PRODUCED DIAMOND THIN-FILMS SO APPLIED PHYSICS LETTERS LA English DT Article AB A thin film, produced by carbon ion implantation and outdiffusion at the temperature of irradiation, has been confirmed to be diamond using micro-Raman spectroscopy and electron diffraction. The Raman spectra contained a definitive diamond peak shifted slightly from that of natural diamond. This shift may be due to residual strain and is consistent with the broad linewidth. Fragments of the film over a micron in size were examined with transmission electron microscopy and found to be untwinned, single crystals. The film had been produced on a polycrystalline copper substrate. The carbon ions were at an ion energy of 120 keV and the irradiation was carried out to a high dose. C1 UNIV WITWATERSRAND,JOHANNESBURG 2001,SOUTH AFRICA. RP HOFF, HA (reprint author), USN,RES LAB,WASHINGTON,DC 20375, USA. RI Butler, James/B-7965-2008 OI Butler, James/0000-0002-4794-7176 NR 8 TC 13 Z9 13 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 JAN 4 PY 1993 VL 62 IS 1 BP 34 EP 36 DI 10.1063/1.108810 PG 3 WC Physics, Applied SC Physics GA KE896 UT WOS:A1993KE89600012 ER PT J AU TUMA, DF AF TUMA, DF TI AND THE BAN PLAYED ON SO NEW REPUBLIC LA English DT Letter C1 USN,PORT HUENEME,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NEW REPUBLIC INC PI WASHINGTON PA 1220 19TH ST NW SUITE 600, WASHINGTON, DC 20036 SN 0028-6583 J9 NEW REPUBLIC JI New Repub. PD JAN 4 PY 1993 VL 208 IS 1-2 BP 4 EP 4 PG 1 WC Political Science SC Government & Law GA KD663 UT WOS:A1993KD66300005 ER PT B AU TWIGG, ME ALLEN, LP MRSTIK, BJ ARDIS, LT AF TWIGG, ME ALLEN, LP MRSTIK, BJ ARDIS, LT GP IEEE TI CHARACTERIZATION OF SIMOX MATERIAL WITH CHANNELED AND UNCHANNELED OXYGEN IMPLANTATION SO 1993 IEEE INTERNATIONAL SOI CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1993 IEEE International SOI Conference CY OCT 05-07, 1993 CL PALM SPRINGS, CA SP IEEE, ELECTRON DEVICES SOC C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-1346-1 PY 1993 BP 50 EP 51 PG 2 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BA38C UT WOS:A1993BA38C00018 ER PT B AU CAMPISI, GJ THOMPSON, P ANC, M CORDTS, B IOANNOU, DE AF CAMPISI, GJ THOMPSON, P ANC, M CORDTS, B IOANNOU, DE GP IEEE TI A SIGE STRAIN LAYER FOR GETTERING FE IN SIMOX SO 1993 IEEE INTERNATIONAL SOI CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1993 IEEE International SOI Conference CY OCT 05-07, 1993 CL PALM SPRINGS, CA SP IEEE, ELECTRON DEVICES SOC C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-1346-1 PY 1993 BP 56 EP 57 PG 2 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BA38C UT WOS:A1993BA38C00021 ER PT B AU LAMBERT, RJ BHAR, TN HUGHES, HL AF LAMBERT, RJ BHAR, TN HUGHES, HL GP IEEE TI ELECTRON TRAPPING IN SIMOX WITH SUPPLEMENTAL IMPLANT SO 1993 IEEE INTERNATIONAL SOI CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1993 IEEE International SOI Conference CY OCT 05-07, 1993 CL PALM SPRINGS, CA SP IEEE, ELECTRON DEVICES SOC C1 USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-1346-1 PY 1993 BP 70 EP 71 PG 2 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BA38C UT WOS:A1993BA38C00028 ER PT B AU CHERMAK, JM PATRICK, RH AF CHERMAK, JM PATRICK, RH BE McCarl, HN TI DECREASING MARGINAL PRODUCTION COSTS AND THE THEORY OF EXHAUSTIBLE RESOURCES - THE CASE OF NATURAL GAS SO 1993 PROCEEDINGS OF THE MINERAL ECONOMICS AND MANAGEMENT SOCIETY LA English DT Proceedings Paper CT 2nd Annual Professional Conference of the Mineral-Economics-and-Management-Society CY FEB 18-20, 1993 CL RENO, NV SP MINERAL ECON & MANAGEMENT SOC C1 USN,POSTGRAD SCH,DRMI,MONTEREY,CA 93943. NR 0 TC 0 Z9 0 U1 1 U2 2 PU MINERAL ECONOMICS & MANAGEMENTSOCIETY PI HOUGHTON PA PO BOX 721, HOUGHTON, MI 49931 PY 1993 BP 117 EP 128 PG 12 WC Business; Economics; Environmental Studies SC Business & Economics; Environmental Sciences & Ecology GA BC59B UT WOS:A1993BC59B00015 ER PT J AU CHUBB, JE AF CHUBB, JE GP CANADIAN INST GEOMAT TI TECHNOLOGYS IMPACT ON THE NAVAL OCEANOGRAPHY COMMAND SURVEY FLEET SO 1993 SURVEYING AND MAPPING CONFERENCE - CELEBRATING OUR HERITAGE, CHARTING OUR FUTURE LA English DT Proceedings Paper CT 1993 Surveying and Mapping Conference on Celebrating Our Heritage - Charting Our Future CY JUN 08-11, 1993 CL TORONTO, CANADA C1 USN,OCEANOG COMMAND,BAY ST LOUIS,MS. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CANADIAN HYDROGRAPHIC ASSOC PI OTTAWA PA PO BOX 5378, STN F, OTTAWA ON, CANADA PY 1993 BP 24 EP 29 PG 6 WC Computer Science, Information Systems; Remote Sensing SC Computer Science; Remote Sensing GA BC03A UT WOS:A1993BC03A00002 ER PT J AU KALCIC, MT KAMINSKY, E AF KALCIC, MT KAMINSKY, E GP CANADIAN INST GEOMAT TI FIELD TESTS OF THE DOLPHIN EM-100 OVER NORFOLK CANYON SO 1993 SURVEYING AND MAPPING CONFERENCE - CELEBRATING OUR HERITAGE, CHARTING OUR FUTURE LA English DT Proceedings Paper CT 1993 Surveying and Mapping Conference on Celebrating Our Heritage - Charting Our Future CY JUN 08-11, 1993 CL TORONTO, CANADA C1 USN,RES LAB,MAPPING CHARTING & GEODESY BRANCH,BAY ST LOUIS,MS. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CANADIAN HYDROGRAPHIC ASSOC PI OTTAWA PA PO BOX 5378, STN F, OTTAWA ON, CANADA PY 1993 BP 60 EP 67 PG 8 WC Computer Science, Information Systems; Remote Sensing SC Computer Science; Remote Sensing GA BC03A UT WOS:A1993BC03A00007 ER PT B AU BAILEY, MP AF BAILEY, MP BE Evans, GW Mollaghasemi, M Russell, EC Biles, WE TI ESTIMATING SERVICE CAPACITY USING NONHOMOGENEOUS WORK ARRIVALS SO 1993 WINTER SIMULATION CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1993 Winter Simulation Conference CY DEC 12-15, 1993 CL LOS ANGELES, CA SP AMER STAT ASSOC, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP SIMULAT, IEEE, COMP SOC, IEEE, SYST MAN & CYBERNET SOC, INST IND ENGINEERS, NIST, OPERAT RES SOC AMER, INST MANAGEMENT SCI, COLL SIMULAT, SOC COMP SIMULAT INT C1 USN,POSTGRAD SCH,DEPT OPERAT RES,MONTEREY,CA 93943. NR 0 TC 1 Z9 1 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-1381-X PY 1993 BP 408 EP 413 PG 6 WC Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BA27E UT WOS:A1993BA27E00058 ER PT B AU HECKATHORN, H WIELAND, F AF HECKATHORN, H WIELAND, F BE Evans, GW Mollaghasemi, M Russell, EC Biles, WE TI PHYSICS-BASED, HIGH-FIDELITY SIMULATION - STRATEGIC SCENE GENERATION MODEL SO 1993 WINTER SIMULATION CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1993 Winter Simulation Conference CY DEC 12-15, 1993 CL LOS ANGELES, CA SP AMER STAT ASSOC, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP SIMULAT, IEEE, COMP SOC, IEEE, SYST MAN & CYBERNET SOC, INST IND ENGINEERS, NIST, OPERAT RES SOC AMER, INST MANAGEMENT SCI, COLL SIMULAT, SOC COMP SIMULAT INT C1 USN,RES LAB,DIV SPACE SCI,OFF STRATEG PHENOMENA,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-1381-X PY 1993 BP 989 EP 995 PG 7 WC Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BA27E UT WOS:A1993BA27E00135 ER PT B AU BAILEY, M DORKO, M KEMPLE, W SCHULTZ, R SOVEREIGN, M AF BAILEY, M DORKO, M KEMPLE, W SCHULTZ, R SOVEREIGN, M BE Evans, GW Mollaghasemi, M Russell, EC Biles, WE TI TESTING, EVALUATING, AND ENHANCING NATO TACTICAL COMMUNICATIONS SCHEMES SO 1993 WINTER SIMULATION CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 1993 Winter Simulation Conference CY DEC 12-15, 1993 CL LOS ANGELES, CA SP AMER STAT ASSOC, ASSOC COMP MACHINERY, SPECIAL INTEREST GRP SIMULAT, IEEE, COMP SOC, IEEE, SYST MAN & CYBERNET SOC, INST IND ENGINEERS, NIST, OPERAT RES SOC AMER, INST MANAGEMENT SCI, COLL SIMULAT, SOC COMP SIMULAT INT C1 USN,POSTGRAD SCH,DEPT OPERAT RES,MONTEREY,CA 93943. NR 0 TC 0 Z9 0 U1 0 U2 0 PU I E E E PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 BN 0-7803-1381-X PY 1993 BP 1098 EP 1105 PG 8 WC Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BA27E UT WOS:A1993BA27E00152 ER PT J AU DERMER, CD SCHLICKEISER, R AF DERMER, CD SCHLICKEISER, R GP INT UNION PURE & APPL PHYS TI PHOTON ATTENUATION FROM SCATTERED RADIATION IN GAMMA-RAY BLAZARS SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 1: CONTRIBUTED PAPERS - OG SESSIONS 1-5 LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 USN,EO HULBERT CTR SPACE RES,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 156 EP 159 PG 4 WC Astronomy & Astrophysics; Physics, Applied; Physics, Nuclear SC Astronomy & Astrophysics; Physics GA BC03S UT WOS:A1993BC03S00041 ER PT J AU DERMER, CD SCHLICKEISER, R AF DERMER, CD SCHLICKEISER, R GP INT UNION PURE & APPL PHYS TI LOCATION OF THE ACCELERATION AND EMISSION SITES IN GAMMA-RAY BLAZARS SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 1: CONTRIBUTED PAPERS - OG SESSIONS 1-5 LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 USN,EO HULBERT CTR SPACE RES,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 160 EP 163 PG 4 WC Astronomy & Astrophysics; Physics, Applied; Physics, Nuclear SC Astronomy & Astrophysics; Physics GA BC03S UT WOS:A1993BC03S00042 ER PT B AU ADAMS, JH BEAHM, LP BOBERG, PR KLEIS, T TYLKA, AJ AF ADAMS, JH BEAHM, LP BOBERG, PR KLEIS, T TYLKA, AJ GP UNIV CALGARY TI HIIS OBSERVATIONS DURING THE LARGE SOLAR ENERGETIC PARTICLE EVENTS OF OCTOBER 1989 SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 3: CONTRIBUTED PAPERS - SH SESSIONS LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 USN,RES LAB,E O HULBURT CTR SPACE RES,WASHINGTON,DC 20375. RI Tylka, Allan/G-9592-2014 NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 374 EP 377 PG 4 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA BC09G UT WOS:A1993BC09G00094 ER PT B AU TYLKA, AJ AF TYLKA, AJ GP UNIV CALGARY TI SPECTRA AND GEOGRAPHICAL DISTRIBUTION OF GEOMAGNETICALLY TRAPPED ANOMALOUS COSMIC RAYS SO 23RD INTERNATIONAL COSMIC RAY CONFERENCE, VOL 3: CONTRIBUTED PAPERS - SH SESSIONS LA English DT Proceedings Paper CT 23rd International Cosmic Ray Conference (XXIII ICRC) CY JUL 19-30, 1993 CL CALGARY, CANADA SP INT UNION PURE & APPL PHYS C1 USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375. RI Tylka, Allan/G-9592-2014 NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALGARY PR PI CALGARY PA 2500 UNIVERSITY DRIVE NW, CALGARY AB T2N 1N4, CANADA PY 1993 BP 436 EP 439 PG 4 WC Astronomy & Astrophysics; Geosciences, Multidisciplinary SC Astronomy & Astrophysics; Geology GA BC09G UT WOS:A1993BC09G00113 ER PT J AU WOOTEN, M RODERICK, DP GORDON, V AF WOOTEN, M RODERICK, DP GORDON, V GP SOC FLIGHT TEST ENGINEERS TI HANDS ON TRAINING FOR THE FLIGHT TEST ENGINEER SO 24TH ANNUAL SYMPOSIUM OF THE SOCIETY OF FLIGHT TEST ENGINEERS, PROCEEDINGS SE PROCEEDINGS - ANNUAL SYMPOSIUM OF THE SOCIETY OF FLIGHT TEST ENGINEERS LA English DT Proceedings Paper CT 24th Annual Symposium of the Society-of-Flight-Test-Engineers CY JUL, 1993 CL SEATTLE, WA SP SOC FLIGHT TEST ENGINEERS, SEATTLE CHAPTER C1 USN,CTR AIR WARFARE,DIV AIRCRAFT,PATUXENT RIVER,MD. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SOC FLIGHT TEST ENGINEERS PI LANCASTER PA P.O. BOX 4047, LANCASTER, CA 93534 SN 1050-9690 J9 PROC ANN SYMP SFTE PY 1993 BP 157 EP 164 PG 8 WC Engineering, Aerospace SC Engineering GA BC03X UT WOS:A1993BC03X00014 ER EF